diff options
Diffstat (limited to 'drivers')
82 files changed, 6953 insertions, 2786 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 8822eca58ffa..5fab6470f4b2 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -20,6 +20,20 @@ config HW_RANDOM If unsure, say Y. +config HW_RANDOM_TIMERIOMEM + tristate "Timer IOMEM HW Random Number Generator support" + depends on HW_RANDOM && HAS_IOMEM + ---help--- + This driver provides kernel-side support for a generic Random + Number Generator used by reading a 'dumb' iomem address that + is to be read no faster than, for example, once a second; + the default FPGA bitstream on the TS-7800 has such functionality. + + To compile this driver as a module, choose M here: the + module will be called timeriomem-rng. + + If unsure, say Y. + config HW_RANDOM_INTEL tristate "Intel HW Random Number Generator support" depends on HW_RANDOM && (X86 || IA64) && PCI diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index b6effb7522c2..e81d21a5f28f 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_HW_RANDOM) += rng-core.o rng-core-y := core.o +obj-$(CONFIG_HW_RANDOM_TIMERIOMEM) += timeriomem-rng.o obj-$(CONFIG_HW_RANDOM_INTEL) += intel-rng.o obj-$(CONFIG_HW_RANDOM_AMD) += amd-rng.o obj-$(CONFIG_HW_RANDOM_GEODE) += geode-rng.o diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c new file mode 100644 index 000000000000..10ad41be5897 --- /dev/null +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -0,0 +1,151 @@ +/* + * drivers/char/hw_random/timeriomem-rng.c + * + * Copyright (C) 2009 Alexander Clouter <alex@digriz.org.uk> + * + * Derived from drivers/char/hw_random/omap-rng.c + * Copyright 2005 (c) MontaVista Software, Inc. + * Author: Deepak Saxena <dsaxena@plexity.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Overview: + * This driver is useful for platforms that have an IO range that provides + * periodic random data from a single IO memory address. All the platform + * has to do is provide the address and 'wait time' that new data becomes + * available. + * + * TODO: add support for reading sizes other than 32bits and masking + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/hw_random.h> +#include <linux/io.h> +#include <linux/timeriomem-rng.h> +#include <linux/jiffies.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/completion.h> + +static struct timeriomem_rng_data *timeriomem_rng_data; + +static void timeriomem_rng_trigger(unsigned long); +static DEFINE_TIMER(timeriomem_rng_timer, timeriomem_rng_trigger, 0, 0); + +/* + * have data return 1, however return 0 if we have nothing + */ +static int timeriomem_rng_data_present(struct hwrng *rng, int wait) +{ + if (rng->priv == 0) + return 1; + + if (!wait || timeriomem_rng_data->present) + return timeriomem_rng_data->present; + + wait_for_completion(&timeriomem_rng_data->completion); + + return 1; +} + +static int timeriomem_rng_data_read(struct hwrng *rng, u32 *data) +{ + unsigned long cur; + s32 delay; + + *data = readl(timeriomem_rng_data->address); + + if (rng->priv != 0) { + cur = jiffies; + + delay = cur - timeriomem_rng_timer.expires; + delay = rng->priv - (delay % rng->priv); + + timeriomem_rng_timer.expires = cur + delay; + timeriomem_rng_data->present = 0; + + init_completion(&timeriomem_rng_data->completion); + add_timer(&timeriomem_rng_timer); + } + + return 4; +} + +static void timeriomem_rng_trigger(unsigned long dummy) +{ + timeriomem_rng_data->present = 1; + complete(&timeriomem_rng_data->completion); +} + +static struct hwrng timeriomem_rng_ops = { + .name = "timeriomem", + .data_present = timeriomem_rng_data_present, + .data_read = timeriomem_rng_data_read, + .priv = 0, +}; + +static int __init timeriomem_rng_probe(struct platform_device *pdev) +{ + int ret; + + timeriomem_rng_data = pdev->dev.platform_data; + + if (timeriomem_rng_data->period != 0 + && usecs_to_jiffies(timeriomem_rng_data->period) > 0) { + timeriomem_rng_timer.expires = jiffies; + + timeriomem_rng_ops.priv = usecs_to_jiffies( + timeriomem_rng_data->period); + } + timeriomem_rng_data->present = 1; + + ret = hwrng_register(&timeriomem_rng_ops); + if (ret) { + dev_err(&pdev->dev, "problem registering\n"); + return ret; + } + + dev_info(&pdev->dev, "32bits from 0x%p @ %dus\n", + timeriomem_rng_data->address, + timeriomem_rng_data->period); + + return 0; +} + +static int __devexit timeriomem_rng_remove(struct platform_device *pdev) +{ + del_timer_sync(&timeriomem_rng_timer); + hwrng_unregister(&timeriomem_rng_ops); + + return 0; +} + +static struct platform_driver timeriomem_rng_driver = { + .driver = { + .name = "timeriomem_rng", + .owner = THIS_MODULE, + }, + .probe = timeriomem_rng_probe, + .remove = __devexit_p(timeriomem_rng_remove), +}; + +static int __init timeriomem_rng_init(void) +{ + return platform_driver_register(&timeriomem_rng_driver); +} + +static void __exit timeriomem_rng_exit(void) +{ + platform_driver_unregister(&timeriomem_rng_driver); +} + +module_init(timeriomem_rng_init); +module_exit(timeriomem_rng_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alexander Clouter <alex@digriz.org.uk>"); +MODULE_DESCRIPTION("Timer IOMEM H/W RNG driver"); diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 9c47dc48c9fd..ccdd828adcef 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -429,134 +429,148 @@ out: #define TPM_DIGEST_SIZE 20 #define TPM_ERROR_SIZE 10 #define TPM_RET_CODE_IDX 6 -#define TPM_GET_CAP_RET_SIZE_IDX 10 -#define TPM_GET_CAP_RET_UINT32_1_IDX 14 -#define TPM_GET_CAP_RET_UINT32_2_IDX 18 -#define TPM_GET_CAP_RET_UINT32_3_IDX 22 -#define TPM_GET_CAP_RET_UINT32_4_IDX 26 -#define TPM_GET_CAP_PERM_DISABLE_IDX 16 -#define TPM_GET_CAP_PERM_INACTIVE_IDX 18 -#define TPM_GET_CAP_RET_BOOL_1_IDX 14 -#define TPM_GET_CAP_TEMP_INACTIVE_IDX 16 - -#define TPM_CAP_IDX 13 -#define TPM_CAP_SUBCAP_IDX 21 enum tpm_capabilities { - TPM_CAP_FLAG = 4, - TPM_CAP_PROP = 5, + TPM_CAP_FLAG = cpu_to_be32(4), + TPM_CAP_PROP = cpu_to_be32(5), + CAP_VERSION_1_1 = cpu_to_be32(0x06), + CAP_VERSION_1_2 = cpu_to_be32(0x1A) }; enum tpm_sub_capabilities { - TPM_CAP_PROP_PCR = 0x1, - TPM_CAP_PROP_MANUFACTURER = 0x3, - TPM_CAP_FLAG_PERM = 0x8, - TPM_CAP_FLAG_VOL = 0x9, - TPM_CAP_PROP_OWNER = 0x11, - TPM_CAP_PROP_TIS_TIMEOUT = 0x15, - TPM_CAP_PROP_TIS_DURATION = 0x20, -}; + TPM_CAP_PROP_PCR = cpu_to_be32(0x101), + TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103), + TPM_CAP_FLAG_PERM = cpu_to_be32(0x108), + TPM_CAP_FLAG_VOL = cpu_to_be32(0x109), + TPM_CAP_PROP_OWNER = cpu_to_be32(0x111), + TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115), + TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120), -/* - * This is a semi generic GetCapability command for use - * with the capability type TPM_CAP_PROP or TPM_CAP_FLAG - * and their associated sub_capabilities. - */ - -static const u8 tpm_cap[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 22, /* length */ - 0, 0, 0, 101, /* TPM_ORD_GetCapability */ - 0, 0, 0, 0, /* TPM_CAP_<TYPE> */ - 0, 0, 0, 4, /* TPM_CAP_SUB_<TYPE> size */ - 0, 0, 1, 0 /* TPM_CAP_SUB_<TYPE> */ }; -static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len, - char *desc) +static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd, + int len, const char *desc) { int err; - len = tpm_transmit(chip, data, len); + len = tpm_transmit(chip,(u8 *) cmd, len); if (len < 0) return len; if (len == TPM_ERROR_SIZE) { - err = be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))); + err = be32_to_cpu(cmd->header.out.return_code); dev_dbg(chip->dev, "A TPM error (%d) occurred %s\n", err, desc); return err; } return 0; } +#define TPM_INTERNAL_RESULT_SIZE 200 +#define TPM_TAG_RQU_COMMAND cpu_to_be16(193) +#define TPM_ORD_GET_CAP cpu_to_be32(101) + +static const struct tpm_input_header tpm_getcap_header = { + .tag = TPM_TAG_RQU_COMMAND, + .length = cpu_to_be32(22), + .ordinal = TPM_ORD_GET_CAP +}; + +ssize_t tpm_getcap(struct device *dev, __be32 subcap_id, cap_t *cap, + const char *desc) +{ + struct tpm_cmd_t tpm_cmd; + int rc; + struct tpm_chip *chip = dev_get_drvdata(dev); + + tpm_cmd.header.in = tpm_getcap_header; + if (subcap_id == CAP_VERSION_1_1 || subcap_id == CAP_VERSION_1_2) { + tpm_cmd.params.getcap_in.cap = subcap_id; + /*subcap field not necessary */ + tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(0); + tpm_cmd.header.in.length -= cpu_to_be32(sizeof(__be32)); + } else { + if (subcap_id == TPM_CAP_FLAG_PERM || + subcap_id == TPM_CAP_FLAG_VOL) + tpm_cmd.params.getcap_in.cap = TPM_CAP_FLAG; + else + tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP; + tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4); + tpm_cmd.params.getcap_in.subcap = subcap_id; + } + rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc); + if (!rc) + *cap = tpm_cmd.params.getcap_out.cap; + return rc; +} + void tpm_gen_interrupt(struct tpm_chip *chip) { - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)]; + struct tpm_cmd_t tpm_cmd; ssize_t rc; - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT; + tpm_cmd.header.in = tpm_getcap_header; + tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP; + tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4); + tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT; - rc = transmit_cmd(chip, data, sizeof(data), + rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, "attempting to determine the timeouts"); } EXPORT_SYMBOL_GPL(tpm_gen_interrupt); void tpm_get_timeouts(struct tpm_chip *chip) { - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)]; + struct tpm_cmd_t tpm_cmd; + struct timeout_t *timeout_cap; + struct duration_t *duration_cap; ssize_t rc; u32 timeout; - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT; + tpm_cmd.header.in = tpm_getcap_header; + tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP; + tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4); + tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT; - rc = transmit_cmd(chip, data, sizeof(data), + rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, "attempting to determine the timeouts"); if (rc) goto duration; - if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX))) + if (be32_to_cpu(tpm_cmd.header.out.length) != 4 * sizeof(u32)) goto duration; + timeout_cap = &tpm_cmd.params.getcap_out.cap.timeout; /* Don't overwrite default if value is 0 */ - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))); + timeout = be32_to_cpu(timeout_cap->a); if (timeout) chip->vendor.timeout_a = usecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX))); + timeout = be32_to_cpu(timeout_cap->b); if (timeout) chip->vendor.timeout_b = usecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX))); + timeout = be32_to_cpu(timeout_cap->c); if (timeout) chip->vendor.timeout_c = usecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX))); + timeout = be32_to_cpu(timeout_cap->d); if (timeout) chip->vendor.timeout_d = usecs_to_jiffies(timeout); duration: - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_DURATION; + tpm_cmd.header.in = tpm_getcap_header; + tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP; + tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4); + tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION; - rc = transmit_cmd(chip, data, sizeof(data), + rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, "attempting to determine the durations"); if (rc) return; - if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX))) + if (be32_to_cpu(tpm_cmd.header.out.return_code) != 3 * sizeof(u32)) return; - + duration_cap = &tpm_cmd.params.getcap_out.cap.duration; chip->vendor.duration[TPM_SHORT] = - usecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_1_IDX)))); + usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_short)); /* The Broadcom BCM0102 chipset in a Dell Latitude D820 gets the above * value wrong and apparently reports msecs rather than usecs. So we * fix up the resulting too-small TPM_SHORT value to make things work. @@ -565,13 +579,9 @@ duration: chip->vendor.duration[TPM_SHORT] = HZ; chip->vendor.duration[TPM_MEDIUM] = - usecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_2_IDX)))); + usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_medium)); chip->vendor.duration[TPM_LONG] = - usecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_3_IDX)))); + usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_long)); } EXPORT_SYMBOL_GPL(tpm_get_timeouts); @@ -587,36 +597,18 @@ void tpm_continue_selftest(struct tpm_chip *chip) } EXPORT_SYMBOL_GPL(tpm_continue_selftest); -#define TPM_INTERNAL_RESULT_SIZE 200 - ssize_t tpm_show_enabled(struct device * dev, struct device_attribute * attr, char *buf) { - u8 *data; + cap_t cap; ssize_t rc; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM; - - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attemtping to determine the permanent enabled state"); - if (rc) { - kfree(data); + rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap, + "attempting to determine the permanent enabled state"); + if (rc) return 0; - } - - rc = sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_DISABLE_IDX]); - kfree(data); + rc = sprintf(buf, "%d\n", !cap.perm_flags.disable); return rc; } EXPORT_SYMBOL_GPL(tpm_show_enabled); @@ -624,31 +616,15 @@ EXPORT_SYMBOL_GPL(tpm_show_enabled); ssize_t tpm_show_active(struct device * dev, struct device_attribute * attr, char *buf) { - u8 *data; + cap_t cap; ssize_t rc; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM; - - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attemtping to determine the permanent active state"); - if (rc) { - kfree(data); + rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap, + "attempting to determine the permanent active state"); + if (rc) return 0; - } - rc = sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_INACTIVE_IDX]); - - kfree(data); + rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated); return rc; } EXPORT_SYMBOL_GPL(tpm_show_active); @@ -656,31 +632,15 @@ EXPORT_SYMBOL_GPL(tpm_show_active); ssize_t tpm_show_owned(struct device * dev, struct device_attribute * attr, char *buf) { - u8 *data; + cap_t cap; ssize_t rc; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_OWNER; - - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attempting to determine the owner state"); - if (rc) { - kfree(data); + rc = tpm_getcap(dev, TPM_CAP_PROP_OWNER, &cap, + "attempting to determine the owner state"); + if (rc) return 0; - } - - rc = sprintf(buf, "%d\n", data[TPM_GET_CAP_RET_BOOL_1_IDX]); - kfree(data); + rc = sprintf(buf, "%d\n", cap.owned); return rc; } EXPORT_SYMBOL_GPL(tpm_show_owned); @@ -688,116 +648,180 @@ EXPORT_SYMBOL_GPL(tpm_show_owned); ssize_t tpm_show_temp_deactivated(struct device * dev, struct device_attribute * attr, char *buf) { - u8 *data; + cap_t cap; ssize_t rc; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; + rc = tpm_getcap(dev, TPM_CAP_FLAG_VOL, &cap, + "attempting to determine the temporary state"); + if (rc) + return 0; - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; + rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated); + return rc; +} +EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated); - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_VOL; +/* + * tpm_chip_find_get - return tpm_chip for given chip number + */ +static struct tpm_chip *tpm_chip_find_get(int chip_num) +{ + struct tpm_chip *pos, *chip = NULL; - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attempting to determine the temporary state"); - if (rc) { - kfree(data); - return 0; + rcu_read_lock(); + list_for_each_entry_rcu(pos, &tpm_chip_list, list) { + if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num) + continue; + + if (try_module_get(pos->dev->driver->owner)) { + chip = pos; + break; + } } + rcu_read_unlock(); + return chip; +} - rc = sprintf(buf, "%d\n", data[TPM_GET_CAP_TEMP_INACTIVE_IDX]); +#define TPM_ORDINAL_PCRREAD cpu_to_be32(21) +#define READ_PCR_RESULT_SIZE 30 +static struct tpm_input_header pcrread_header = { + .tag = TPM_TAG_RQU_COMMAND, + .length = cpu_to_be32(14), + .ordinal = TPM_ORDINAL_PCRREAD +}; - kfree(data); +int __tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf) +{ + int rc; + struct tpm_cmd_t cmd; + + cmd.header.in = pcrread_header; + cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx); + BUILD_BUG_ON(cmd.header.in.length > READ_PCR_RESULT_SIZE); + rc = transmit_cmd(chip, &cmd, cmd.header.in.length, + "attempting to read a pcr value"); + + if (rc == 0) + memcpy(res_buf, cmd.params.pcrread_out.pcr_result, + TPM_DIGEST_SIZE); return rc; } -EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated); -static const u8 pcrread[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 14, /* length */ - 0, 0, 0, 21, /* TPM_ORD_PcrRead */ - 0, 0, 0, 0 /* PCR index */ +/** + * tpm_pcr_read - read a pcr value + * @chip_num: tpm idx # or ANY + * @pcr_idx: pcr idx to retrieve + * @res_buf: TPM_PCR value + * size of res_buf is 20 bytes (or NULL if you don't care) + * + * The TPM driver should be built-in, but for whatever reason it + * isn't, protect against the chip disappearing, by incrementing + * the module usage count. + */ +int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) +{ + struct tpm_chip *chip; + int rc; + + chip = tpm_chip_find_get(chip_num); + if (chip == NULL) + return -ENODEV; + rc = __tpm_pcr_read(chip, pcr_idx, res_buf); + module_put(chip->dev->driver->owner); + return rc; +} +EXPORT_SYMBOL_GPL(tpm_pcr_read); + +/** + * tpm_pcr_extend - extend pcr value with hash + * @chip_num: tpm idx # or AN& + * @pcr_idx: pcr idx to extend + * @hash: hash value used to extend pcr value + * + * The TPM driver should be built-in, but for whatever reason it + * isn't, protect against the chip disappearing, by incrementing + * the module usage count. + */ +#define TPM_ORD_PCR_EXTEND cpu_to_be32(20) +#define EXTEND_PCR_SIZE 34 +static struct tpm_input_header pcrextend_header = { + .tag = TPM_TAG_RQU_COMMAND, + .length = cpu_to_be32(34), + .ordinal = TPM_ORD_PCR_EXTEND }; +int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) +{ + struct tpm_cmd_t cmd; + int rc; + struct tpm_chip *chip; + + chip = tpm_chip_find_get(chip_num); + if (chip == NULL) + return -ENODEV; + + cmd.header.in = pcrextend_header; + BUILD_BUG_ON(be32_to_cpu(cmd.header.in.length) > EXTEND_PCR_SIZE); + cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx); + memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE); + rc = transmit_cmd(chip, &cmd, cmd.header.in.length, + "attempting extend a PCR value"); + + module_put(chip->dev->driver->owner); + return rc; +} +EXPORT_SYMBOL_GPL(tpm_pcr_extend); + ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr, char *buf) { - u8 *data; + cap_t cap; + u8 digest[TPM_DIGEST_SIZE]; ssize_t rc; int i, j, num_pcrs; - __be32 index; char *str = buf; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_PCR; - - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, + rc = tpm_getcap(dev, TPM_CAP_PROP_PCR, &cap, "attempting to determine the number of PCRS"); - if (rc) { - kfree(data); + if (rc) return 0; - } - num_pcrs = be32_to_cpu(*((__be32 *) (data + 14))); + num_pcrs = be32_to_cpu(cap.num_pcrs); for (i = 0; i < num_pcrs; i++) { - memcpy(data, pcrread, sizeof(pcrread)); - index = cpu_to_be32(i); - memcpy(data + 10, &index, 4); - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attempting to read a PCR"); + rc = __tpm_pcr_read(chip, i, digest); if (rc) - goto out; + break; str += sprintf(str, "PCR-%02d: ", i); for (j = 0; j < TPM_DIGEST_SIZE; j++) - str += sprintf(str, "%02X ", *(data + 10 + j)); + str += sprintf(str, "%02X ", digest[j]); str += sprintf(str, "\n"); } -out: - kfree(data); return str - buf; } EXPORT_SYMBOL_GPL(tpm_show_pcrs); #define READ_PUBEK_RESULT_SIZE 314 -static const u8 readpubek[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 30, /* length */ - 0, 0, 0, 124, /* TPM_ORD_ReadPubek */ +#define TPM_ORD_READPUBEK cpu_to_be32(124) +struct tpm_input_header tpm_readpubek_header = { + .tag = TPM_TAG_RQU_COMMAND, + .length = cpu_to_be32(30), + .ordinal = TPM_ORD_READPUBEK }; ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr, char *buf) { u8 *data; + struct tpm_cmd_t tpm_cmd; ssize_t err; int i, rc; char *str = buf; struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - data = kzalloc(READ_PUBEK_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, readpubek, sizeof(readpubek)); - - err = transmit_cmd(chip, data, READ_PUBEK_RESULT_SIZE, + tpm_cmd.header.in = tpm_readpubek_header; + err = transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, "attempting to read the PUBEK"); if (err) goto out; @@ -812,7 +836,7 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr, 256 byte modulus ignore checksum 20 bytes */ - + data = tpm_cmd.params.readpubek_out_buffer; str += sprintf(str, "Algorithm: %02X %02X %02X %02X\nEncscheme: %02X %02X\n" @@ -832,65 +856,33 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr, } out: rc = str - buf; - kfree(data); return rc; } EXPORT_SYMBOL_GPL(tpm_show_pubek); -#define CAP_VERSION_1_1 6 -#define CAP_VERSION_1_2 0x1A -#define CAP_VERSION_IDX 13 -static const u8 cap_version[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 18, /* length */ - 0, 0, 0, 101, /* TPM_ORD_GetCapability */ - 0, 0, 0, 0, - 0, 0, 0, 0 -}; ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr, char *buf) { - u8 *data; + cap_t cap; ssize_t rc; char *str = buf; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER; - - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, + rc = tpm_getcap(dev, TPM_CAP_PROP_MANUFACTURER, &cap, "attempting to determine the manufacturer"); - if (rc) { - kfree(data); + if (rc) return 0; - } - str += sprintf(str, "Manufacturer: 0x%x\n", - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)))); + be32_to_cpu(cap.manufacturer_id)); - memcpy(data, cap_version, sizeof(cap_version)); - data[CAP_VERSION_IDX] = CAP_VERSION_1_1; - rc = transmit_cmd(chip, data, TPM_INTERNAL_RESULT_SIZE, - "attempting to determine the 1.1 version"); + rc = tpm_getcap(dev, CAP_VERSION_1_1, &cap, + "attempting to determine the 1.1 version"); if (rc) - goto out; - + return 0; str += sprintf(str, "TCG version: %d.%d\nFirmware version: %d.%d\n", - (int) data[14], (int) data[15], (int) data[16], - (int) data[17]); - -out: - kfree(data); + cap.tpm_version.Major, cap.tpm_version.Minor, + cap.tpm_version.revMajor, cap.tpm_version.revMinor); return str - buf; } EXPORT_SYMBOL_GPL(tpm_show_caps); @@ -898,51 +890,25 @@ EXPORT_SYMBOL_GPL(tpm_show_caps); ssize_t tpm_show_caps_1_2(struct device * dev, struct device_attribute * attr, char *buf) { - u8 *data; - ssize_t len; + cap_t cap; + ssize_t rc; char *str = buf; - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(TPM_INTERNAL_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER; - - len = tpm_transmit(chip, data, TPM_INTERNAL_RESULT_SIZE); - if (len <= TPM_ERROR_SIZE) { - dev_dbg(chip->dev, "A TPM error (%d) occurred " - "attempting to determine the manufacturer\n", - be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)))); - kfree(data); + rc = tpm_getcap(dev, TPM_CAP_PROP_MANUFACTURER, &cap, + "attempting to determine the manufacturer"); + if (rc) return 0; - } - str += sprintf(str, "Manufacturer: 0x%x\n", - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)))); - - memcpy(data, cap_version, sizeof(cap_version)); - data[CAP_VERSION_IDX] = CAP_VERSION_1_2; - - len = tpm_transmit(chip, data, TPM_INTERNAL_RESULT_SIZE); - if (len <= TPM_ERROR_SIZE) { - dev_err(chip->dev, "A TPM error (%d) occurred " - "attempting to determine the 1.2 version\n", - be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)))); - goto out; - } + be32_to_cpu(cap.manufacturer_id)); + rc = tpm_getcap(dev, CAP_VERSION_1_2, &cap, + "attempting to determine the 1.2 version"); + if (rc) + return 0; str += sprintf(str, "TCG version: %d.%d\nFirmware version: %d.%d\n", - (int) data[16], (int) data[17], (int) data[18], - (int) data[19]); - -out: - kfree(data); + cap.tpm_version_1_2.Major, cap.tpm_version_1_2.Minor, + cap.tpm_version_1_2.revMajor, + cap.tpm_version_1_2.revMinor); return str - buf; } EXPORT_SYMBOL_GPL(tpm_show_caps_1_2); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 8e30df4a4388..8e00b4ddd083 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -26,6 +26,7 @@ #include <linux/miscdevice.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/tpm.h> enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ @@ -123,6 +124,147 @@ static inline void tpm_write_index(int base, int index, int value) outb(index, base); outb(value & 0xFF, base+1); } +struct tpm_input_header { + __be16 tag; + __be32 length; + __be32 ordinal; +}__attribute__((packed)); + +struct tpm_output_header { + __be16 tag; + __be32 length; + __be32 return_code; +}__attribute__((packed)); + +struct stclear_flags_t { + __be16 tag; + u8 deactivated; + u8 disableForceClear; + u8 physicalPresence; + u8 physicalPresenceLock; + u8 bGlobalLock; +}__attribute__((packed)); + +struct tpm_version_t { + u8 Major; + u8 Minor; + u8 revMajor; + u8 revMinor; +}__attribute__((packed)); + +struct tpm_version_1_2_t { + __be16 tag; + u8 Major; + u8 Minor; + u8 revMajor; + u8 revMinor; +}__attribute__((packed)); + +struct timeout_t { + __be32 a; + __be32 b; + __be32 c; + __be32 d; +}__attribute__((packed)); + +struct duration_t { + __be32 tpm_short; + __be32 tpm_medium; + __be32 tpm_long; +}__attribute__((packed)); + +struct permanent_flags_t { + __be16 tag; + u8 disable; + u8 ownership; + u8 deactivated; + u8 readPubek; + u8 disableOwnerClear; + u8 allowMaintenance; + u8 physicalPresenceLifetimeLock; + u8 physicalPresenceHWEnable; + u8 physicalPresenceCMDEnable; + u8 CEKPUsed; + u8 TPMpost; + u8 TPMpostLock; + u8 FIPS; + u8 operator; + u8 enableRevokeEK; + u8 nvLocked; + u8 readSRKPub; + u8 tpmEstablished; + u8 maintenanceDone; + u8 disableFullDALogicInfo; +}__attribute__((packed)); + +typedef union { + struct permanent_flags_t perm_flags; + struct stclear_flags_t stclear_flags; + bool owned; + __be32 num_pcrs; + struct tpm_version_t tpm_version; + struct tpm_version_1_2_t tpm_version_1_2; + __be32 manufacturer_id; + struct timeout_t timeout; + struct duration_t duration; +} cap_t; + +struct tpm_getcap_params_in { + __be32 cap; + __be32 subcap_size; + __be32 subcap; +}__attribute__((packed)); + +struct tpm_getcap_params_out { + __be32 cap_size; + cap_t cap; +}__attribute__((packed)); + +struct tpm_readpubek_params_out { + u8 algorithm[4]; + u8 encscheme[2]; + u8 sigscheme[2]; + u8 parameters[12]; /*assuming RSA*/ + __be32 keysize; + u8 modulus[256]; + u8 checksum[20]; +}__attribute__((packed)); + +typedef union { + struct tpm_input_header in; + struct tpm_output_header out; +} tpm_cmd_header; + +#define TPM_DIGEST_SIZE 20 +struct tpm_pcrread_out { + u8 pcr_result[TPM_DIGEST_SIZE]; +}__attribute__((packed)); + +struct tpm_pcrread_in { + __be32 pcr_idx; +}__attribute__((packed)); + +struct tpm_pcrextend_in { + __be32 pcr_idx; + u8 hash[TPM_DIGEST_SIZE]; +}__attribute__((packed)); + +typedef union { + struct tpm_getcap_params_out getcap_out; + struct tpm_readpubek_params_out readpubek_out; + u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; + struct tpm_getcap_params_in getcap_in; + struct tpm_pcrread_in pcrread_in; + struct tpm_pcrread_out pcrread_out; + struct tpm_pcrextend_in pcrextend_in; +} tpm_cmd_params; + +struct tpm_cmd_t { + tpm_cmd_header header; + tpm_cmd_params params; +}__attribute__((packed)); + +ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); extern void tpm_get_timeouts(struct tpm_chip *); extern void tpm_gen_interrupt(struct tpm_chip *); diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 1525882190fd..1efb2879a94f 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o obj-$(CONFIG_X86_CYCLONE_TIMER) += cyclone.o obj-$(CONFIG_X86_PM_TIMER) += acpi_pm.o obj-$(CONFIG_SCx200HR_TIMER) += scx200_hrt.o +obj-$(CONFIG_SH_TIMER_CMT) += sh_cmt.o diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c new file mode 100644 index 000000000000..7783b42f6914 --- /dev/null +++ b/drivers/clocksource/sh_cmt.c @@ -0,0 +1,615 @@ +/* + * SuperH Timer Support - CMT + * + * Copyright (C) 2008 Magnus Damm + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/irq.h> +#include <linux/err.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/sh_cmt.h> + +struct sh_cmt_priv { + void __iomem *mapbase; + struct clk *clk; + unsigned long width; /* 16 or 32 bit version of hardware block */ + unsigned long overflow_bit; + unsigned long clear_bits; + struct irqaction irqaction; + struct platform_device *pdev; + + unsigned long flags; + unsigned long match_value; + unsigned long next_match_value; + unsigned long max_match_value; + unsigned long rate; + spinlock_t lock; + struct clock_event_device ced; + unsigned long total_cycles; +}; + +static DEFINE_SPINLOCK(sh_cmt_lock); + +#define CMSTR -1 /* shared register */ +#define CMCSR 0 /* channel register */ +#define CMCNT 1 /* channel register */ +#define CMCOR 2 /* channel register */ + +static inline unsigned long sh_cmt_read(struct sh_cmt_priv *p, int reg_nr) +{ + struct sh_cmt_config *cfg = p->pdev->dev.platform_data; + void __iomem *base = p->mapbase; + unsigned long offs; + + if (reg_nr == CMSTR) { + offs = 0; + base -= cfg->channel_offset; + } else + offs = reg_nr; + + if (p->width == 16) + offs <<= 1; + else { + offs <<= 2; + if ((reg_nr == CMCNT) || (reg_nr == CMCOR)) + return ioread32(base + offs); + } + + return ioread16(base + offs); +} + +static inline void sh_cmt_write(struct sh_cmt_priv *p, int reg_nr, + unsigned long value) +{ + struct sh_cmt_config *cfg = p->pdev->dev.platform_data; + void __iomem *base = p->mapbase; + unsigned long offs; + + if (reg_nr == CMSTR) { + offs = 0; + base -= cfg->channel_offset; + } else + offs = reg_nr; + + if (p->width == 16) + offs <<= 1; + else { + offs <<= 2; + if ((reg_nr == CMCNT) || (reg_nr == CMCOR)) { + iowrite32(value, base + offs); + return; + } + } + + iowrite16(value, base + offs); +} + +static unsigned long sh_cmt_get_counter(struct sh_cmt_priv *p, + int *has_wrapped) +{ + unsigned long v1, v2, v3; + + /* Make sure the timer value is stable. Stolen from acpi_pm.c */ + do { + v1 = sh_cmt_read(p, CMCNT); + v2 = sh_cmt_read(p, CMCNT); + v3 = sh_cmt_read(p, CMCNT); + } while (unlikely((v1 > v2 && v1 < v3) || (v2 > v3 && v2 < v1) + || (v3 > v1 && v3 < v2))); + + *has_wrapped = sh_cmt_read(p, CMCSR) & p->overflow_bit; + return v2; +} + + +static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start) +{ + struct sh_cmt_config *cfg = p->pdev->dev.platform_data; + unsigned long flags, value; + + /* start stop register shared by multiple timer channels */ + spin_lock_irqsave(&sh_cmt_lock, flags); + value = sh_cmt_read(p, CMSTR); + + if (start) + value |= 1 << cfg->timer_bit; + else + value &= ~(1 << cfg->timer_bit); + + sh_cmt_write(p, CMSTR, value); + spin_unlock_irqrestore(&sh_cmt_lock, flags); +} + +static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate) +{ + struct sh_cmt_config *cfg = p->pdev->dev.platform_data; + int ret; + + /* enable clock */ + ret = clk_enable(p->clk); + if (ret) { + pr_err("sh_cmt: cannot enable clock \"%s\"\n", cfg->clk); + return ret; + } + *rate = clk_get_rate(p->clk) / 8; + + /* make sure channel is disabled */ + sh_cmt_start_stop_ch(p, 0); + + /* configure channel, periodic mode and maximum timeout */ + if (p->width == 16) + sh_cmt_write(p, CMCSR, 0); + else + sh_cmt_write(p, CMCSR, 0x01a4); + + sh_cmt_write(p, CMCOR, 0xffffffff); + sh_cmt_write(p, CMCNT, 0); + + /* enable channel */ + sh_cmt_start_stop_ch(p, 1); + return 0; +} + +static void sh_cmt_disable(struct sh_cmt_priv *p) +{ + /* disable channel */ + sh_cmt_start_stop_ch(p, 0); + + /* stop clock */ + clk_disable(p->clk); +} + +/* private flags */ +#define FLAG_CLOCKEVENT (1 << 0) +#define FLAG_CLOCKSOURCE (1 << 1) +#define FLAG_REPROGRAM (1 << 2) +#define FLAG_SKIPEVENT (1 << 3) +#define FLAG_IRQCONTEXT (1 << 4) + +static void sh_cmt_clock_event_program_verify(struct sh_cmt_priv *p, + int absolute) +{ + unsigned long new_match; + unsigned long value = p->next_match_value; + unsigned long delay = 0; + unsigned long now = 0; + int has_wrapped; + + now = sh_cmt_get_counter(p, &has_wrapped); + p->flags |= FLAG_REPROGRAM; /* force reprogram */ + + if (has_wrapped) { + /* we're competing with the interrupt handler. + * -> let the interrupt handler reprogram the timer. + * -> interrupt number two handles the event. + */ + p->flags |= FLAG_SKIPEVENT; + return; + } + + if (absolute) + now = 0; + + do { + /* reprogram the timer hardware, + * but don't save the new match value yet. + */ + new_match = now + value + delay; + if (new_match > p->max_match_value) + new_match = p->max_match_value; + + sh_cmt_write(p, CMCOR, new_match); + + now = sh_cmt_get_counter(p, &has_wrapped); + if (has_wrapped && (new_match > p->match_value)) { + /* we are changing to a greater match value, + * so this wrap must be caused by the counter + * matching the old value. + * -> first interrupt reprograms the timer. + * -> interrupt number two handles the event. + */ + p->flags |= FLAG_SKIPEVENT; + break; + } + + if (has_wrapped) { + /* we are changing to a smaller match value, + * so the wrap must be caused by the counter + * matching the new value. + * -> save programmed match value. + * -> let isr handle the event. + */ + p->match_value = new_match; + break; + } + + /* be safe: verify hardware settings */ + if (now < new_match) { + /* timer value is below match value, all good. + * this makes sure we won't miss any match events. + * -> save programmed match value. + * -> let isr handle the event. + */ + p->match_value = new_match; + break; + } + + /* the counter has reached a value greater + * than our new match value. and since the + * has_wrapped flag isn't set we must have + * programmed a too close event. + * -> increase delay and retry. + */ + if (delay) + delay <<= 1; + else + delay = 1; + + if (!delay) + pr_warning("sh_cmt: too long delay\n"); + + } while (delay); +} + +static void sh_cmt_set_next(struct sh_cmt_priv *p, unsigned long delta) +{ + unsigned long flags; + + if (delta > p->max_match_value) + pr_warning("sh_cmt: delta out of range\n"); + + spin_lock_irqsave(&p->lock, flags); + p->next_match_value = delta; + sh_cmt_clock_event_program_verify(p, 0); + spin_unlock_irqrestore(&p->lock, flags); +} + +static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id) +{ + struct sh_cmt_priv *p = dev_id; + + /* clear flags */ + sh_cmt_write(p, CMCSR, sh_cmt_read(p, CMCSR) & p->clear_bits); + + /* update clock source counter to begin with if enabled + * the wrap flag should be cleared by the timer specific + * isr before we end up here. + */ + if (p->flags & FLAG_CLOCKSOURCE) + p->total_cycles += p->match_value; + + if (!(p->flags & FLAG_REPROGRAM)) + p->next_match_value = p->max_match_value; + + p->flags |= FLAG_IRQCONTEXT; + + if (p->flags & FLAG_CLOCKEVENT) { + if (!(p->flags & FLAG_SKIPEVENT)) { + if (p->ced.mode == CLOCK_EVT_MODE_ONESHOT) { + p->next_match_value = p->max_match_value; + p->flags |= FLAG_REPROGRAM; + } + + p->ced.event_handler(&p->ced); + } + } + + p->flags &= ~FLAG_SKIPEVENT; + + if (p->flags & FLAG_REPROGRAM) { + p->flags &= ~FLAG_REPROGRAM; + sh_cmt_clock_event_program_verify(p, 1); + + if (p->flags & FLAG_CLOCKEVENT) + if ((p->ced.mode == CLOCK_EVT_MODE_SHUTDOWN) + || (p->match_value == p->next_match_value)) + p->flags &= ~FLAG_REPROGRAM; + } + + p->flags &= ~FLAG_IRQCONTEXT; + + return IRQ_HANDLED; +} + +static int sh_cmt_start(struct sh_cmt_priv *p, unsigned long flag) +{ + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&p->lock, flags); + + if (!(p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE))) + ret = sh_cmt_enable(p, &p->rate); + + if (ret) + goto out; + p->flags |= flag; + + /* setup timeout if no clockevent */ + if ((flag == FLAG_CLOCKSOURCE) && (!(p->flags & FLAG_CLOCKEVENT))) + sh_cmt_set_next(p, p->max_match_value); + out: + spin_unlock_irqrestore(&p->lock, flags); + + return ret; +} + +static void sh_cmt_stop(struct sh_cmt_priv *p, unsigned long flag) +{ + unsigned long flags; + unsigned long f; + + spin_lock_irqsave(&p->lock, flags); + + f = p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE); + p->flags &= ~flag; + + if (f && !(p->flags & (FLAG_CLOCKEVENT | FLAG_CLOCKSOURCE))) + sh_cmt_disable(p); + + /* adjust the timeout to maximum if only clocksource left */ + if ((flag == FLAG_CLOCKEVENT) && (p->flags & FLAG_CLOCKSOURCE)) + sh_cmt_set_next(p, p->max_match_value); + + spin_unlock_irqrestore(&p->lock, flags); +} + +static struct sh_cmt_priv *ced_to_sh_cmt(struct clock_event_device *ced) +{ + return container_of(ced, struct sh_cmt_priv, ced); +} + +static void sh_cmt_clock_event_start(struct sh_cmt_priv *p, int periodic) +{ + struct clock_event_device *ced = &p->ced; + + sh_cmt_start(p, FLAG_CLOCKEVENT); + + /* TODO: calculate good shift from rate and counter bit width */ + + ced->shift = 32; + ced->mult = div_sc(p->rate, NSEC_PER_SEC, ced->shift); + ced->max_delta_ns = clockevent_delta2ns(p->max_match_value, ced); + ced->min_delta_ns = clockevent_delta2ns(0x1f, ced); + + if (periodic) + sh_cmt_set_next(p, (p->rate + HZ/2) / HZ); + else + sh_cmt_set_next(p, p->max_match_value); +} + +static void sh_cmt_clock_event_mode(enum clock_event_mode mode, + struct clock_event_device *ced) +{ + struct sh_cmt_priv *p = ced_to_sh_cmt(ced); + + /* deal with old setting first */ + switch (ced->mode) { + case CLOCK_EVT_MODE_PERIODIC: + case CLOCK_EVT_MODE_ONESHOT: + sh_cmt_stop(p, FLAG_CLOCKEVENT); + break; + default: + break; + } + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + pr_info("sh_cmt: %s used for periodic clock events\n", + ced->name); + sh_cmt_clock_event_start(p, 1); + break; + case CLOCK_EVT_MODE_ONESHOT: + pr_info("sh_cmt: %s used for oneshot clock events\n", + ced->name); + sh_cmt_clock_event_start(p, 0); + break; + case CLOCK_EVT_MODE_SHUTDOWN: + case CLOCK_EVT_MODE_UNUSED: + sh_cmt_stop(p, FLAG_CLOCKEVENT); + break; + default: + break; + } +} + +static int sh_cmt_clock_event_next(unsigned long delta, + struct clock_event_device *ced) +{ + struct sh_cmt_priv *p = ced_to_sh_cmt(ced); + + BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT); + if (likely(p->flags & FLAG_IRQCONTEXT)) + p->next_match_value = delta; + else + sh_cmt_set_next(p, delta); + + return 0; +} + +static void sh_cmt_register_clockevent(struct sh_cmt_priv *p, + char *name, unsigned long rating) +{ + struct clock_event_device *ced = &p->ced; + + memset(ced, 0, sizeof(*ced)); + + ced->name = name; + ced->features = CLOCK_EVT_FEAT_PERIODIC; + ced->features |= CLOCK_EVT_FEAT_ONESHOT; + ced->rating = rating; + ced->cpumask = cpumask_of(0); + ced->set_next_event = sh_cmt_clock_event_next; + ced->set_mode = sh_cmt_clock_event_mode; + + pr_info("sh_cmt: %s used for clock events\n", ced->name); + ced->mult = 1; /* work around misplaced WARN_ON() in clockevents.c */ + clockevents_register_device(ced); +} + +int sh_cmt_register(struct sh_cmt_priv *p, char *name, + unsigned long clockevent_rating, + unsigned long clocksource_rating) +{ + if (p->width == (sizeof(p->max_match_value) * 8)) + p->max_match_value = ~0; + else + p->max_match_value = (1 << p->width) - 1; + + p->match_value = p->max_match_value; + spin_lock_init(&p->lock); + + if (clockevent_rating) + sh_cmt_register_clockevent(p, name, clockevent_rating); + + return 0; +} + +static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev) +{ + struct sh_cmt_config *cfg = pdev->dev.platform_data; + struct resource *res; + int irq, ret; + ret = -ENXIO; + + memset(p, 0, sizeof(*p)); + p->pdev = pdev; + + if (!cfg) { + dev_err(&p->pdev->dev, "missing platform data\n"); + goto err0; + } + + platform_set_drvdata(pdev, p); + + res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&p->pdev->dev, "failed to get I/O memory\n"); + goto err0; + } + + irq = platform_get_irq(p->pdev, 0); + if (irq < 0) { + dev_err(&p->pdev->dev, "failed to get irq\n"); + goto err0; + } + + /* map memory, let mapbase point to our channel */ + p->mapbase = ioremap_nocache(res->start, resource_size(res)); + if (p->mapbase == NULL) { + pr_err("sh_cmt: failed to remap I/O memory\n"); + goto err0; + } + + /* request irq using setup_irq() (too early for request_irq()) */ + p->irqaction.name = cfg->name; + p->irqaction.handler = sh_cmt_interrupt; + p->irqaction.dev_id = p; + p->irqaction.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL; + p->irqaction.mask = CPU_MASK_NONE; + ret = setup_irq(irq, &p->irqaction); + if (ret) { + pr_err("sh_cmt: failed to request irq %d\n", irq); + goto err1; + } + + /* get hold of clock */ + p->clk = clk_get(&p->pdev->dev, cfg->clk); + if (IS_ERR(p->clk)) { + pr_err("sh_cmt: cannot get clock \"%s\"\n", cfg->clk); + ret = PTR_ERR(p->clk); + goto err2; + } + + if (resource_size(res) == 6) { + p->width = 16; + p->overflow_bit = 0x80; + p->clear_bits = ~0xc0; + } else { + p->width = 32; + p->overflow_bit = 0x8000; + p->clear_bits = ~0xc000; + } + + return sh_cmt_register(p, cfg->name, + cfg->clockevent_rating, + cfg->clocksource_rating); + err2: + free_irq(irq, p); + err1: + iounmap(p->mapbase); + err0: + return ret; +} + +static int __devinit sh_cmt_probe(struct platform_device *pdev) +{ + struct sh_cmt_priv *p = platform_get_drvdata(pdev); + int ret; + + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (p == NULL) { + dev_err(&pdev->dev, "failed to allocate driver data\n"); + return -ENOMEM; + } + + ret = sh_cmt_setup(p, pdev); + if (ret) { + kfree(p); + + platform_set_drvdata(pdev, NULL); + } + return ret; +} + +static int __devexit sh_cmt_remove(struct platform_device *pdev) +{ + return -EBUSY; /* cannot unregister clockevent and clocksource */ +} + +static struct platform_driver sh_cmt_device_driver = { + .probe = sh_cmt_probe, + .remove = __devexit_p(sh_cmt_remove), + .driver = { + .name = "sh_cmt", + } +}; + +static int __init sh_cmt_init(void) +{ + return platform_driver_register(&sh_cmt_device_driver); +} + +static void __exit sh_cmt_exit(void) +{ + platform_driver_unregister(&sh_cmt_device_driver); +} + +module_init(sh_cmt_init); +module_exit(sh_cmt_exit); + +MODULE_AUTHOR("Magnus Damm"); +MODULE_DESCRIPTION("SuperH CMT Timer Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index d6daf3c507d3..d270e8eb3e67 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -104,7 +104,8 @@ EXPORT_SYMBOL_GPL(unlock_policy_rwsem_write); /* internal prototypes */ -static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event); +static int __cpufreq_governor(struct cpufreq_policy *policy, + unsigned int event); static unsigned int __cpufreq_get(unsigned int cpu); static void handle_update(struct work_struct *work); @@ -128,7 +129,7 @@ static int __init init_cpufreq_transition_notifier_list(void) pure_initcall(init_cpufreq_transition_notifier_list); static LIST_HEAD(cpufreq_governor_list); -static DEFINE_MUTEX (cpufreq_governor_mutex); +static DEFINE_MUTEX(cpufreq_governor_mutex); struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) { @@ -371,7 +372,7 @@ static struct cpufreq_governor *__find_governor(const char *str_governor) struct cpufreq_governor *t; list_for_each_entry(t, &cpufreq_governor_list, governor_list) - if (!strnicmp(str_governor,t->name,CPUFREQ_NAME_LEN)) + if (!strnicmp(str_governor, t->name, CPUFREQ_NAME_LEN)) return t; return NULL; @@ -429,15 +430,11 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy, mutex_unlock(&cpufreq_governor_mutex); } - out: +out: return err; } -/* drivers/base/cpu.c */ -extern struct sysdev_class cpu_sysdev_class; - - /** * cpufreq_per_cpu_attr_read() / show_##file_name() - * print out cpufreq information @@ -450,11 +447,12 @@ extern struct sysdev_class cpu_sysdev_class; static ssize_t show_##file_name \ (struct cpufreq_policy *policy, char *buf) \ { \ - return sprintf (buf, "%u\n", policy->object); \ + return sprintf(buf, "%u\n", policy->object); \ } show_one(cpuinfo_min_freq, cpuinfo.min_freq); show_one(cpuinfo_max_freq, cpuinfo.max_freq); +show_one(cpuinfo_transition_latency, cpuinfo.transition_latency); show_one(scaling_min_freq, min); show_one(scaling_max_freq, max); show_one(scaling_cur_freq, cur); @@ -476,7 +474,7 @@ static ssize_t store_##file_name \ if (ret) \ return -EINVAL; \ \ - ret = sscanf (buf, "%u", &new_policy.object); \ + ret = sscanf(buf, "%u", &new_policy.object); \ if (ret != 1) \ return -EINVAL; \ \ @@ -486,8 +484,8 @@ static ssize_t store_##file_name \ return ret ? ret : count; \ } -store_one(scaling_min_freq,min); -store_one(scaling_max_freq,max); +store_one(scaling_min_freq, min); +store_one(scaling_max_freq, max); /** * show_cpuinfo_cur_freq - current CPU frequency as detected by hardware @@ -507,12 +505,13 @@ static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy, */ static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf) { - if(policy->policy == CPUFREQ_POLICY_POWERSAVE) + if (policy->policy == CPUFREQ_POLICY_POWERSAVE) return sprintf(buf, "powersave\n"); else if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) return sprintf(buf, "performance\n"); else if (policy->governor) - return scnprintf(buf, CPUFREQ_NAME_LEN, "%s\n", policy->governor->name); + return scnprintf(buf, CPUFREQ_NAME_LEN, "%s\n", + policy->governor->name); return -EINVAL; } @@ -531,7 +530,7 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy, if (ret) return ret; - ret = sscanf (buf, "%15s", str_governor); + ret = sscanf(buf, "%15s", str_governor); if (ret != 1) return -EINVAL; @@ -575,7 +574,8 @@ static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy, } list_for_each_entry(t, &cpufreq_governor_list, governor_list) { - if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) - (CPUFREQ_NAME_LEN + 2))) + if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) + - (CPUFREQ_NAME_LEN + 2))) goto out; i += scnprintf(&buf[i], CPUFREQ_NAME_LEN, "%s ", t->name); } @@ -594,7 +594,7 @@ static ssize_t show_cpus(const struct cpumask *mask, char *buf) i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " "); i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu); if (i >= (PAGE_SIZE - 5)) - break; + break; } i += sprintf(&buf[i], "\n"); return i; @@ -660,6 +660,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name) define_one_ro0400(cpuinfo_cur_freq); define_one_ro(cpuinfo_min_freq); define_one_ro(cpuinfo_max_freq); +define_one_ro(cpuinfo_transition_latency); define_one_ro(scaling_available_governors); define_one_ro(scaling_driver); define_one_ro(scaling_cur_freq); @@ -673,6 +674,7 @@ define_one_rw(scaling_setspeed); static struct attribute *default_attrs[] = { &cpuinfo_min_freq.attr, &cpuinfo_max_freq.attr, + &cpuinfo_transition_latency.attr, &scaling_min_freq.attr, &scaling_max_freq.attr, &affected_cpus.attr, @@ -684,10 +686,10 @@ static struct attribute *default_attrs[] = { NULL }; -#define to_policy(k) container_of(k,struct cpufreq_policy,kobj) -#define to_attr(a) container_of(a,struct freq_attr,attr) +#define to_policy(k) container_of(k, struct cpufreq_policy, kobj) +#define to_attr(a) container_of(a, struct freq_attr, attr) -static ssize_t show(struct kobject *kobj, struct attribute *attr ,char *buf) +static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) { struct cpufreq_policy *policy = to_policy(kobj); struct freq_attr *fattr = to_attr(attr); @@ -853,10 +855,10 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) if (cpu == j) continue; - /* check for existing affected CPUs. They may not be aware - * of it due to CPU Hotplug. + /* Check for existing affected CPUs. + * They may not be aware of it due to CPU Hotplug. */ - managed_policy = cpufreq_cpu_get(j); // FIXME: Where is this released? What about error paths? + managed_policy = cpufreq_cpu_get(j); /* FIXME: Where is this released? What about error paths? */ if (unlikely(managed_policy)) { /* Set proper policy_cpu */ @@ -1127,8 +1129,8 @@ static void handle_update(struct work_struct *work) * @old_freq: CPU frequency the kernel thinks the CPU runs at * @new_freq: CPU frequency the CPU actually runs at * - * We adjust to current frequency first, and need to clean up later. So either call - * to cpufreq_update_policy() or schedule handle_update()). + * We adjust to current frequency first, and need to clean up later. + * So either call to cpufreq_update_policy() or schedule handle_update()). */ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, unsigned int new_freq) @@ -1610,7 +1612,8 @@ EXPORT_SYMBOL_GPL(cpufreq_unregister_governor); /** * cpufreq_get_policy - get the current cpufreq_policy - * @policy: struct cpufreq_policy into which the current cpufreq_policy is written + * @policy: struct cpufreq_policy into which the current cpufreq_policy + * is written * * Reads the current cpufreq policy. */ diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 0320962c4ec5..2ecd95e4ab1a 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -4,7 +4,7 @@ * Copyright (C) 2001 Russell King * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. * Jun Nakajima <jun.nakajima@intel.com> - * (C) 2004 Alexander Clouter <alex-kernel@digriz.org.uk> + * (C) 2009 Alexander Clouter <alex@digriz.org.uk> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -13,22 +13,17 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/smp.h> #include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ctype.h> #include <linux/cpufreq.h> -#include <linux/sysctl.h> -#include <linux/types.h> -#include <linux/fs.h> -#include <linux/sysfs.h> #include <linux/cpu.h> -#include <linux/kmod.h> -#include <linux/workqueue.h> #include <linux/jiffies.h> #include <linux/kernel_stat.h> -#include <linux/percpu.h> #include <linux/mutex.h> +#include <linux/hrtimer.h> +#include <linux/tick.h> +#include <linux/ktime.h> +#include <linux/sched.h> + /* * dbs is used in this file as a shortform for demandbased switching * It helps to keep variable names smaller, simpler @@ -43,19 +38,31 @@ * latency of the processor. The governor will work on any processor with * transition latency <= 10mS, using appropriate sampling * rate. - * For CPUs with transition latency > 10mS (mostly drivers - * with CPUFREQ_ETERNAL), this governor will not work. + * For CPUs with transition latency > 10mS (mostly drivers with CPUFREQ_ETERNAL) + * this governor will not work. * All times here are in uS. */ static unsigned int def_sampling_rate; #define MIN_SAMPLING_RATE_RATIO (2) /* for correct statistics, we need at least 10 ticks between each measure */ -#define MIN_STAT_SAMPLING_RATE \ +#define MIN_STAT_SAMPLING_RATE \ (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10)) #define MIN_SAMPLING_RATE \ (def_sampling_rate / MIN_SAMPLING_RATE_RATIO) +/* Above MIN_SAMPLING_RATE will vanish with its sysfs file soon + * Define the minimal settable sampling rate to the greater of: + * - "HW transition latency" * 100 (same as default sampling / 10) + * - MIN_STAT_SAMPLING_RATE + * To avoid that userspace shoots itself. +*/ +static unsigned int minimum_sampling_rate(void) +{ + return max(def_sampling_rate / 10, MIN_STAT_SAMPLING_RATE); +} + +/* This will also vanish soon with removing sampling_rate_max */ #define MAX_SAMPLING_RATE (500 * def_sampling_rate) -#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000) +#define LATENCY_MULTIPLIER (1000) #define DEF_SAMPLING_DOWN_FACTOR (1) #define MAX_SAMPLING_DOWN_FACTOR (10) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) @@ -63,12 +70,15 @@ static unsigned int def_sampling_rate; static void do_dbs_timer(struct work_struct *work); struct cpu_dbs_info_s { + cputime64_t prev_cpu_idle; + cputime64_t prev_cpu_wall; + cputime64_t prev_cpu_nice; struct cpufreq_policy *cur_policy; - unsigned int prev_cpu_idle_up; - unsigned int prev_cpu_idle_down; - unsigned int enable; + struct delayed_work work; unsigned int down_skip; unsigned int requested_freq; + int cpu; + unsigned int enable:1; }; static DEFINE_PER_CPU(struct cpu_dbs_info_s, cpu_dbs_info); @@ -82,19 +92,18 @@ static unsigned int dbs_enable; /* number of CPUs using this policy */ * cpu_hotplug lock should be taken before that. Note that cpu_hotplug lock * is recursive for the same process. -Venki */ -static DEFINE_MUTEX (dbs_mutex); -static DECLARE_DELAYED_WORK(dbs_work, do_dbs_timer); +static DEFINE_MUTEX(dbs_mutex); -struct dbs_tuners { +static struct workqueue_struct *kconservative_wq; + +static struct dbs_tuners { unsigned int sampling_rate; unsigned int sampling_down_factor; unsigned int up_threshold; unsigned int down_threshold; unsigned int ignore_nice; unsigned int freq_step; -}; - -static struct dbs_tuners dbs_tuners_ins = { +} dbs_tuners_ins = { .up_threshold = DEF_FREQUENCY_UP_THRESHOLD, .down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD, .sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR, @@ -102,18 +111,37 @@ static struct dbs_tuners dbs_tuners_ins = { .freq_step = 5, }; -static inline unsigned int get_cpu_idle_time(unsigned int cpu) +static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu, + cputime64_t *wall) { - unsigned int add_nice = 0, ret; + cputime64_t idle_time; + cputime64_t cur_wall_time; + cputime64_t busy_time; - if (dbs_tuners_ins.ignore_nice) - add_nice = kstat_cpu(cpu).cpustat.nice; + cur_wall_time = jiffies64_to_cputime64(get_jiffies_64()); + busy_time = cputime64_add(kstat_cpu(cpu).cpustat.user, + kstat_cpu(cpu).cpustat.system); + + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.irq); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.softirq); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.steal); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.nice); + + idle_time = cputime64_sub(cur_wall_time, busy_time); + if (wall) + *wall = cur_wall_time; + + return idle_time; +} + +static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall) +{ + u64 idle_time = get_cpu_idle_time_us(cpu, wall); - ret = kstat_cpu(cpu).cpustat.idle + - kstat_cpu(cpu).cpustat.iowait + - add_nice; + if (idle_time == -1ULL) + return get_cpu_idle_time_jiffy(cpu, wall); - return ret; + return idle_time; } /* keep track of frequency transitions */ @@ -125,10 +153,21 @@ dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val, struct cpu_dbs_info_s *this_dbs_info = &per_cpu(cpu_dbs_info, freq->cpu); + struct cpufreq_policy *policy; + if (!this_dbs_info->enable) return 0; - this_dbs_info->requested_freq = freq->new; + policy = this_dbs_info->cur_policy; + + /* + * we only care if our internally tracked freq moves outside + * the 'valid' ranges of freqency available to us otherwise + * we do not change it + */ + if (this_dbs_info->requested_freq > policy->max + || this_dbs_info->requested_freq < policy->min) + this_dbs_info->requested_freq = freq->new; return 0; } @@ -140,16 +179,31 @@ static struct notifier_block dbs_cpufreq_notifier_block = { /************************** sysfs interface ************************/ static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) { - return sprintf (buf, "%u\n", MAX_SAMPLING_RATE); + static int print_once; + + if (!print_once) { + printk(KERN_INFO "CPUFREQ: conservative sampling_rate_max " + "sysfs file is deprecated - used by: %s\n", + current->comm); + print_once = 1; + } + return sprintf(buf, "%u\n", MAX_SAMPLING_RATE); } static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) { - return sprintf (buf, "%u\n", MIN_SAMPLING_RATE); + static int print_once; + + if (!print_once) { + printk(KERN_INFO "CPUFREQ: conservative sampling_rate_max " + "sysfs file is deprecated - used by: %s\n", current->comm); + print_once = 1; + } + return sprintf(buf, "%u\n", MIN_SAMPLING_RATE); } -#define define_one_ro(_name) \ -static struct freq_attr _name = \ +#define define_one_ro(_name) \ +static struct freq_attr _name = \ __ATTR(_name, 0444, show_##_name, NULL) define_one_ro(sampling_rate_max); @@ -174,7 +228,8 @@ static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, { unsigned int input; int ret; - ret = sscanf (buf, "%u", &input); + ret = sscanf(buf, "%u", &input); + if (ret != 1 || input > MAX_SAMPLING_DOWN_FACTOR || input < 1) return -EINVAL; @@ -190,15 +245,13 @@ static ssize_t store_sampling_rate(struct cpufreq_policy *unused, { unsigned int input; int ret; - ret = sscanf (buf, "%u", &input); + ret = sscanf(buf, "%u", &input); - mutex_lock(&dbs_mutex); - if (ret != 1 || input > MAX_SAMPLING_RATE || input < MIN_SAMPLING_RATE) { - mutex_unlock(&dbs_mutex); + if (ret != 1) return -EINVAL; - } - dbs_tuners_ins.sampling_rate = input; + mutex_lock(&dbs_mutex); + dbs_tuners_ins.sampling_rate = max(input, minimum_sampling_rate()); mutex_unlock(&dbs_mutex); return count; @@ -209,10 +262,11 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused, { unsigned int input; int ret; - ret = sscanf (buf, "%u", &input); + ret = sscanf(buf, "%u", &input); mutex_lock(&dbs_mutex); - if (ret != 1 || input > 100 || input <= dbs_tuners_ins.down_threshold) { + if (ret != 1 || input > 100 || + input <= dbs_tuners_ins.down_threshold) { mutex_unlock(&dbs_mutex); return -EINVAL; } @@ -228,10 +282,12 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused, { unsigned int input; int ret; - ret = sscanf (buf, "%u", &input); + ret = sscanf(buf, "%u", &input); mutex_lock(&dbs_mutex); - if (ret != 1 || input > 100 || input >= dbs_tuners_ins.up_threshold) { + /* cannot be lower than 11 otherwise freq will not fall */ + if (ret != 1 || input < 11 || input > 100 || + input >= dbs_tuners_ins.up_threshold) { mutex_unlock(&dbs_mutex); return -EINVAL; } @@ -264,12 +320,14 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, } dbs_tuners_ins.ignore_nice = input; - /* we need to re-evaluate prev_cpu_idle_up and prev_cpu_idle_down */ + /* we need to re-evaluate prev_cpu_idle */ for_each_online_cpu(j) { - struct cpu_dbs_info_s *j_dbs_info; - j_dbs_info = &per_cpu(cpu_dbs_info, j); - j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(j); - j_dbs_info->prev_cpu_idle_down = j_dbs_info->prev_cpu_idle_up; + struct cpu_dbs_info_s *dbs_info; + dbs_info = &per_cpu(cpu_dbs_info, j); + dbs_info->prev_cpu_idle = get_cpu_idle_time(j, + &dbs_info->prev_cpu_wall); + if (dbs_tuners_ins.ignore_nice) + dbs_info->prev_cpu_nice = kstat_cpu(j).cpustat.nice; } mutex_unlock(&dbs_mutex); @@ -281,7 +339,6 @@ static ssize_t store_freq_step(struct cpufreq_policy *policy, { unsigned int input; int ret; - ret = sscanf(buf, "%u", &input); if (ret != 1) @@ -310,7 +367,7 @@ define_one_rw(down_threshold); define_one_rw(ignore_nice_load); define_one_rw(freq_step); -static struct attribute * dbs_attributes[] = { +static struct attribute *dbs_attributes[] = { &sampling_rate_max.attr, &sampling_rate_min.attr, &sampling_rate.attr, @@ -329,55 +386,78 @@ static struct attribute_group dbs_attr_group = { /************************** sysfs end ************************/ -static void dbs_check_cpu(int cpu) +static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) { - unsigned int idle_ticks, up_idle_ticks, down_idle_ticks; - unsigned int tmp_idle_ticks, total_idle_ticks; + unsigned int load = 0; unsigned int freq_target; - unsigned int freq_down_sampling_rate; - struct cpu_dbs_info_s *this_dbs_info = &per_cpu(cpu_dbs_info, cpu); - struct cpufreq_policy *policy; - if (!this_dbs_info->enable) - return; + struct cpufreq_policy *policy; + unsigned int j; policy = this_dbs_info->cur_policy; /* - * The default safe range is 20% to 80% - * Every sampling_rate, we check - * - If current idle time is less than 20%, then we try to - * increase frequency - * Every sampling_rate*sampling_down_factor, we check - * - If current idle time is more than 80%, then we try to - * decrease frequency + * Every sampling_rate, we check, if current idle time is less + * than 20% (default), then we try to increase frequency + * Every sampling_rate*sampling_down_factor, we check, if current + * idle time is more than 80%, then we try to decrease frequency * * Any frequency increase takes it to the maximum frequency. * Frequency reduction happens at minimum steps of - * 5% (default) of max_frequency + * 5% (default) of maximum frequency */ - /* Check for frequency increase */ - idle_ticks = UINT_MAX; + /* Get Absolute Load */ + for_each_cpu(j, policy->cpus) { + struct cpu_dbs_info_s *j_dbs_info; + cputime64_t cur_wall_time, cur_idle_time; + unsigned int idle_time, wall_time; - /* Check for frequency increase */ - total_idle_ticks = get_cpu_idle_time(cpu); - tmp_idle_ticks = total_idle_ticks - - this_dbs_info->prev_cpu_idle_up; - this_dbs_info->prev_cpu_idle_up = total_idle_ticks; + j_dbs_info = &per_cpu(cpu_dbs_info, j); + + cur_idle_time = get_cpu_idle_time(j, &cur_wall_time); + + wall_time = (unsigned int) cputime64_sub(cur_wall_time, + j_dbs_info->prev_cpu_wall); + j_dbs_info->prev_cpu_wall = cur_wall_time; + + idle_time = (unsigned int) cputime64_sub(cur_idle_time, + j_dbs_info->prev_cpu_idle); + j_dbs_info->prev_cpu_idle = cur_idle_time; + + if (dbs_tuners_ins.ignore_nice) { + cputime64_t cur_nice; + unsigned long cur_nice_jiffies; + + cur_nice = cputime64_sub(kstat_cpu(j).cpustat.nice, + j_dbs_info->prev_cpu_nice); + /* + * Assumption: nice time between sampling periods will + * be less than 2^32 jiffies for 32 bit sys + */ + cur_nice_jiffies = (unsigned long) + cputime64_to_jiffies64(cur_nice); - if (tmp_idle_ticks < idle_ticks) - idle_ticks = tmp_idle_ticks; + j_dbs_info->prev_cpu_nice = kstat_cpu(j).cpustat.nice; + idle_time += jiffies_to_usecs(cur_nice_jiffies); + } + + if (unlikely(!wall_time || wall_time < idle_time)) + continue; + + load = 100 * (wall_time - idle_time) / wall_time; + } - /* Scale idle ticks by 100 and compare with up and down ticks */ - idle_ticks *= 100; - up_idle_ticks = (100 - dbs_tuners_ins.up_threshold) * - usecs_to_jiffies(dbs_tuners_ins.sampling_rate); + /* + * break out if we 'cannot' reduce the speed as the user might + * want freq_step to be zero + */ + if (dbs_tuners_ins.freq_step == 0) + return; - if (idle_ticks < up_idle_ticks) { + /* Check for frequency increase */ + if (load > dbs_tuners_ins.up_threshold) { this_dbs_info->down_skip = 0; - this_dbs_info->prev_cpu_idle_down = - this_dbs_info->prev_cpu_idle_up; /* if we are already at full speed then break out early */ if (this_dbs_info->requested_freq == policy->max) @@ -398,49 +478,24 @@ static void dbs_check_cpu(int cpu) return; } - /* Check for frequency decrease */ - this_dbs_info->down_skip++; - if (this_dbs_info->down_skip < dbs_tuners_ins.sampling_down_factor) - return; - - /* Check for frequency decrease */ - total_idle_ticks = this_dbs_info->prev_cpu_idle_up; - tmp_idle_ticks = total_idle_ticks - - this_dbs_info->prev_cpu_idle_down; - this_dbs_info->prev_cpu_idle_down = total_idle_ticks; - - if (tmp_idle_ticks < idle_ticks) - idle_ticks = tmp_idle_ticks; - - /* Scale idle ticks by 100 and compare with up and down ticks */ - idle_ticks *= 100; - this_dbs_info->down_skip = 0; - - freq_down_sampling_rate = dbs_tuners_ins.sampling_rate * - dbs_tuners_ins.sampling_down_factor; - down_idle_ticks = (100 - dbs_tuners_ins.down_threshold) * - usecs_to_jiffies(freq_down_sampling_rate); - - if (idle_ticks > down_idle_ticks) { - /* - * if we are already at the lowest speed then break out early - * or if we 'cannot' reduce the speed as the user might want - * freq_target to be zero - */ - if (this_dbs_info->requested_freq == policy->min - || dbs_tuners_ins.freq_step == 0) - return; - + /* + * The optimal frequency is the frequency that is the lowest that + * can support the current CPU usage without triggering the up + * policy. To be safe, we focus 10 points under the threshold. + */ + if (load < (dbs_tuners_ins.down_threshold - 10)) { freq_target = (dbs_tuners_ins.freq_step * policy->max) / 100; - /* max freq cannot be less than 100. But who knows.... */ - if (unlikely(freq_target == 0)) - freq_target = 5; - this_dbs_info->requested_freq -= freq_target; if (this_dbs_info->requested_freq < policy->min) this_dbs_info->requested_freq = policy->min; + /* + * if we cannot reduce the frequency anymore, break out early + */ + if (policy->cur == policy->min) + return; + __cpufreq_driver_target(policy, this_dbs_info->requested_freq, CPUFREQ_RELATION_H); return; @@ -449,27 +504,45 @@ static void dbs_check_cpu(int cpu) static void do_dbs_timer(struct work_struct *work) { - int i; - mutex_lock(&dbs_mutex); - for_each_online_cpu(i) - dbs_check_cpu(i); - schedule_delayed_work(&dbs_work, - usecs_to_jiffies(dbs_tuners_ins.sampling_rate)); - mutex_unlock(&dbs_mutex); + struct cpu_dbs_info_s *dbs_info = + container_of(work, struct cpu_dbs_info_s, work.work); + unsigned int cpu = dbs_info->cpu; + + /* We want all CPUs to do sampling nearly on same jiffy */ + int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); + + delay -= jiffies % delay; + + if (lock_policy_rwsem_write(cpu) < 0) + return; + + if (!dbs_info->enable) { + unlock_policy_rwsem_write(cpu); + return; + } + + dbs_check_cpu(dbs_info); + + queue_delayed_work_on(cpu, kconservative_wq, &dbs_info->work, delay); + unlock_policy_rwsem_write(cpu); } -static inline void dbs_timer_init(void) +static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info) { - init_timer_deferrable(&dbs_work.timer); - schedule_delayed_work(&dbs_work, - usecs_to_jiffies(dbs_tuners_ins.sampling_rate)); - return; + /* We want all CPUs to do sampling nearly on same jiffy */ + int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate); + delay -= jiffies % delay; + + dbs_info->enable = 1; + INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer); + queue_delayed_work_on(dbs_info->cpu, kconservative_wq, &dbs_info->work, + delay); } -static inline void dbs_timer_exit(void) +static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info) { - cancel_delayed_work(&dbs_work); - return; + dbs_info->enable = 0; + cancel_delayed_work(&dbs_info->work); } static int cpufreq_governor_dbs(struct cpufreq_policy *policy, @@ -503,11 +576,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, j_dbs_info = &per_cpu(cpu_dbs_info, j); j_dbs_info->cur_policy = policy; - j_dbs_info->prev_cpu_idle_up = get_cpu_idle_time(cpu); - j_dbs_info->prev_cpu_idle_down - = j_dbs_info->prev_cpu_idle_up; + j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j, + &j_dbs_info->prev_cpu_wall); + if (dbs_tuners_ins.ignore_nice) { + j_dbs_info->prev_cpu_nice = + kstat_cpu(j).cpustat.nice; + } } - this_dbs_info->enable = 1; this_dbs_info->down_skip = 0; this_dbs_info->requested_freq = policy->cur; @@ -523,38 +598,36 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, if (latency == 0) latency = 1; - def_sampling_rate = 10 * latency * - DEF_SAMPLING_RATE_LATENCY_MULTIPLIER; - - if (def_sampling_rate < MIN_STAT_SAMPLING_RATE) - def_sampling_rate = MIN_STAT_SAMPLING_RATE; + def_sampling_rate = + max(latency * LATENCY_MULTIPLIER, + MIN_STAT_SAMPLING_RATE); dbs_tuners_ins.sampling_rate = def_sampling_rate; - dbs_timer_init(); cpufreq_register_notifier( &dbs_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER); } + dbs_timer_init(this_dbs_info); mutex_unlock(&dbs_mutex); + break; case CPUFREQ_GOV_STOP: mutex_lock(&dbs_mutex); - this_dbs_info->enable = 0; + dbs_timer_exit(this_dbs_info); sysfs_remove_group(&policy->kobj, &dbs_attr_group); dbs_enable--; + /* * Stop the timerschedule work, when this governor * is used for first time */ - if (dbs_enable == 0) { - dbs_timer_exit(); + if (dbs_enable == 0) cpufreq_unregister_notifier( &dbs_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER); - } mutex_unlock(&dbs_mutex); @@ -571,6 +644,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, this_dbs_info->cur_policy, policy->min, CPUFREQ_RELATION_L); mutex_unlock(&dbs_mutex); + break; } return 0; @@ -588,23 +662,33 @@ struct cpufreq_governor cpufreq_gov_conservative = { static int __init cpufreq_gov_dbs_init(void) { - return cpufreq_register_governor(&cpufreq_gov_conservative); + int err; + + kconservative_wq = create_workqueue("kconservative"); + if (!kconservative_wq) { + printk(KERN_ERR "Creation of kconservative failed\n"); + return -EFAULT; + } + + err = cpufreq_register_governor(&cpufreq_gov_conservative); + if (err) + destroy_workqueue(kconservative_wq); + + return err; } static void __exit cpufreq_gov_dbs_exit(void) { - /* Make sure that the scheduled work is indeed not running */ - flush_scheduled_work(); - cpufreq_unregister_governor(&cpufreq_gov_conservative); + destroy_workqueue(kconservative_wq); } -MODULE_AUTHOR ("Alexander Clouter <alex-kernel@digriz.org.uk>"); -MODULE_DESCRIPTION ("'cpufreq_conservative' - A dynamic cpufreq governor for " +MODULE_AUTHOR("Alexander Clouter <alex@digriz.org.uk>"); +MODULE_DESCRIPTION("'cpufreq_conservative' - A dynamic cpufreq governor for " "Low Latency Frequency Transition capable processors " "optimised for use in a battery environment"); -MODULE_LICENSE ("GPL"); +MODULE_LICENSE("GPL"); #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE fs_initcall(cpufreq_gov_dbs_init); diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 6f45b1658a67..338f428a15b7 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -21,6 +21,7 @@ #include <linux/hrtimer.h> #include <linux/tick.h> #include <linux/ktime.h> +#include <linux/sched.h> /* * dbs is used in this file as a shortform for demandbased switching @@ -51,8 +52,20 @@ static unsigned int def_sampling_rate; (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10)) #define MIN_SAMPLING_RATE \ (def_sampling_rate / MIN_SAMPLING_RATE_RATIO) +/* Above MIN_SAMPLING_RATE will vanish with its sysfs file soon + * Define the minimal settable sampling rate to the greater of: + * - "HW transition latency" * 100 (same as default sampling / 10) + * - MIN_STAT_SAMPLING_RATE + * To avoid that userspace shoots itself. +*/ +static unsigned int minimum_sampling_rate(void) +{ + return max(def_sampling_rate / 10, MIN_STAT_SAMPLING_RATE); +} + +/* This will also vanish soon with removing sampling_rate_max */ #define MAX_SAMPLING_RATE (500 * def_sampling_rate) -#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000) +#define LATENCY_MULTIPLIER (1000) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) static void do_dbs_timer(struct work_struct *work); @@ -65,14 +78,14 @@ struct cpu_dbs_info_s { cputime64_t prev_cpu_wall; cputime64_t prev_cpu_nice; struct cpufreq_policy *cur_policy; - struct delayed_work work; + struct delayed_work work; struct cpufreq_frequency_table *freq_table; unsigned int freq_lo; unsigned int freq_lo_jiffies; unsigned int freq_hi_jiffies; int cpu; unsigned int enable:1, - sample_type:1; + sample_type:1; }; static DEFINE_PER_CPU(struct cpu_dbs_info_s, cpu_dbs_info); @@ -203,12 +216,28 @@ static void ondemand_powersave_bias_init(void) /************************** sysfs interface ************************/ static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) { - return sprintf (buf, "%u\n", MAX_SAMPLING_RATE); + static int print_once; + + if (!print_once) { + printk(KERN_INFO "CPUFREQ: ondemand sampling_rate_max " + "sysfs file is deprecated - used by: %s\n", + current->comm); + print_once = 1; + } + return sprintf(buf, "%u\n", MAX_SAMPLING_RATE); } static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) { - return sprintf (buf, "%u\n", MIN_SAMPLING_RATE); + static int print_once; + + if (!print_once) { + printk(KERN_INFO "CPUFREQ: ondemand sampling_rate_min " + "sysfs file is deprecated - used by: %s\n", + current->comm); + print_once = 1; + } + return sprintf(buf, "%u\n", MIN_SAMPLING_RATE); } #define define_one_ro(_name) \ @@ -238,13 +267,11 @@ static ssize_t store_sampling_rate(struct cpufreq_policy *unused, ret = sscanf(buf, "%u", &input); mutex_lock(&dbs_mutex); - if (ret != 1 || input > MAX_SAMPLING_RATE - || input < MIN_SAMPLING_RATE) { + if (ret != 1) { mutex_unlock(&dbs_mutex); return -EINVAL; } - - dbs_tuners_ins.sampling_rate = input; + dbs_tuners_ins.sampling_rate = max(input, minimum_sampling_rate()); mutex_unlock(&dbs_mutex); return count; @@ -279,14 +306,14 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, unsigned int j; ret = sscanf(buf, "%u", &input); - if ( ret != 1 ) + if (ret != 1) return -EINVAL; - if ( input > 1 ) + if (input > 1) input = 1; mutex_lock(&dbs_mutex); - if ( input == dbs_tuners_ins.ignore_nice ) { /* nothing to do */ + if (input == dbs_tuners_ins.ignore_nice) { /* nothing to do */ mutex_unlock(&dbs_mutex); return count; } @@ -337,7 +364,7 @@ define_one_rw(up_threshold); define_one_rw(ignore_nice_load); define_one_rw(powersave_bias); -static struct attribute * dbs_attributes[] = { +static struct attribute *dbs_attributes[] = { &sampling_rate_max.attr, &sampling_rate_min.attr, &sampling_rate.attr, @@ -512,8 +539,7 @@ static void do_dbs_timer(struct work_struct *work) } } else { __cpufreq_driver_target(dbs_info->cur_policy, - dbs_info->freq_lo, - CPUFREQ_RELATION_H); + dbs_info->freq_lo, CPUFREQ_RELATION_H); } queue_delayed_work_on(cpu, kondemand_wq, &dbs_info->work, delay); unlock_policy_rwsem_write(cpu); @@ -530,7 +556,7 @@ static inline void dbs_timer_init(struct cpu_dbs_info_s *dbs_info) dbs_info->sample_type = DBS_NORMAL_SAMPLE; INIT_DELAYED_WORK_DEFERRABLE(&dbs_info->work, do_dbs_timer); queue_delayed_work_on(dbs_info->cpu, kondemand_wq, &dbs_info->work, - delay); + delay); } static inline void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info) @@ -591,11 +617,9 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, if (latency == 0) latency = 1; - def_sampling_rate = latency * - DEF_SAMPLING_RATE_LATENCY_MULTIPLIER; - - if (def_sampling_rate < MIN_STAT_SAMPLING_RATE) - def_sampling_rate = MIN_STAT_SAMPLING_RATE; + def_sampling_rate = + max(latency * LATENCY_MULTIPLIER, + MIN_STAT_SAMPLING_RATE); dbs_tuners_ins.sampling_rate = def_sampling_rate; } @@ -617,12 +641,10 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, mutex_lock(&dbs_mutex); if (policy->max < this_dbs_info->cur_policy->cur) __cpufreq_driver_target(this_dbs_info->cur_policy, - policy->max, - CPUFREQ_RELATION_H); + policy->max, CPUFREQ_RELATION_H); else if (policy->min > this_dbs_info->cur_policy->cur) __cpufreq_driver_target(this_dbs_info->cur_policy, - policy->min, - CPUFREQ_RELATION_L); + policy->min, CPUFREQ_RELATION_L); mutex_unlock(&dbs_mutex); break; } @@ -677,7 +699,7 @@ static void __exit cpufreq_gov_dbs_exit(void) MODULE_AUTHOR("Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>"); MODULE_AUTHOR("Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>"); MODULE_DESCRIPTION("'cpufreq_ondemand' - A dynamic cpufreq governor for " - "Low Latency Frequency Transition capable processors"); + "Low Latency Frequency Transition capable processors"); MODULE_LICENSE("GPL"); #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index c0ff97d375d7..5a62d678dd19 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -2,7 +2,7 @@ * drivers/cpufreq/cpufreq_stats.c * * Copyright (C) 2003-2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. - * (C) 2004 Zou Nan hai <nanhai.zou@intel.com>. + * (C) 2004 Zou Nan hai <nanhai.zou@intel.com>. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -23,7 +23,7 @@ static spinlock_t cpufreq_stats_lock; -#define CPUFREQ_STATDEVICE_ATTR(_name,_mode,_show) \ +#define CPUFREQ_STATDEVICE_ATTR(_name, _mode, _show) \ static struct freq_attr _attr_##_name = {\ .attr = {.name = __stringify(_name), .mode = _mode, }, \ .show = _show,\ @@ -50,8 +50,7 @@ struct cpufreq_stats_attribute { ssize_t(*show) (struct cpufreq_stats *, char *); }; -static int -cpufreq_stats_update (unsigned int cpu) +static int cpufreq_stats_update(unsigned int cpu) { struct cpufreq_stats *stat; unsigned long long cur_time; @@ -68,8 +67,7 @@ cpufreq_stats_update (unsigned int cpu) return 0; } -static ssize_t -show_total_trans(struct cpufreq_policy *policy, char *buf) +static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf) { struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); if (!stat) @@ -78,8 +76,7 @@ show_total_trans(struct cpufreq_policy *policy, char *buf) per_cpu(cpufreq_stats_table, stat->cpu)->total_trans); } -static ssize_t -show_time_in_state(struct cpufreq_policy *policy, char *buf) +static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf) { ssize_t len = 0; int i; @@ -89,14 +86,14 @@ show_time_in_state(struct cpufreq_policy *policy, char *buf) cpufreq_stats_update(stat->cpu); for (i = 0; i < stat->state_num; i++) { len += sprintf(buf + len, "%u %llu\n", stat->freq_table[i], - (unsigned long long)cputime64_to_clock_t(stat->time_in_state[i])); + (unsigned long long) + cputime64_to_clock_t(stat->time_in_state[i])); } return len; } #ifdef CONFIG_CPU_FREQ_STAT_DETAILS -static ssize_t -show_trans_table(struct cpufreq_policy *policy, char *buf) +static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf) { ssize_t len = 0; int i, j; @@ -139,11 +136,11 @@ show_trans_table(struct cpufreq_policy *policy, char *buf) return PAGE_SIZE; return len; } -CPUFREQ_STATDEVICE_ATTR(trans_table,0444,show_trans_table); +CPUFREQ_STATDEVICE_ATTR(trans_table, 0444, show_trans_table); #endif -CPUFREQ_STATDEVICE_ATTR(total_trans,0444,show_total_trans); -CPUFREQ_STATDEVICE_ATTR(time_in_state,0444,show_time_in_state); +CPUFREQ_STATDEVICE_ATTR(total_trans, 0444, show_total_trans); +CPUFREQ_STATDEVICE_ATTR(time_in_state, 0444, show_time_in_state); static struct attribute *default_attrs[] = { &_attr_total_trans.attr, @@ -158,8 +155,7 @@ static struct attribute_group stats_attr_group = { .name = "stats" }; -static int -freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq) +static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq) { int index; for (index = 0; index < stat->max_state; index++) @@ -183,8 +179,7 @@ static void cpufreq_stats_free_table(unsigned int cpu) cpufreq_cpu_put(policy); } -static int -cpufreq_stats_create_table (struct cpufreq_policy *policy, +static int cpufreq_stats_create_table(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table) { unsigned int i, j, count = 0, ret = 0; @@ -194,7 +189,8 @@ cpufreq_stats_create_table (struct cpufreq_policy *policy, unsigned int cpu = policy->cpu; if (per_cpu(cpufreq_stats_table, cpu)) return -EBUSY; - if ((stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL)) == NULL) + stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL); + if ((stat) == NULL) return -ENOMEM; data = cpufreq_cpu_get(cpu); @@ -203,13 +199,14 @@ cpufreq_stats_create_table (struct cpufreq_policy *policy, goto error_get_fail; } - if ((ret = sysfs_create_group(&data->kobj, &stats_attr_group))) + ret = sysfs_create_group(&data->kobj, &stats_attr_group); + if (ret) goto error_out; stat->cpu = cpu; per_cpu(cpufreq_stats_table, cpu) = stat; - for (i=0; table[i].frequency != CPUFREQ_TABLE_END; i++) { + for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { unsigned int freq = table[i].frequency; if (freq == CPUFREQ_ENTRY_INVALID) continue; @@ -255,9 +252,8 @@ error_get_fail: return ret; } -static int -cpufreq_stat_notifier_policy (struct notifier_block *nb, unsigned long val, - void *data) +static int cpufreq_stat_notifier_policy(struct notifier_block *nb, + unsigned long val, void *data) { int ret; struct cpufreq_policy *policy = data; @@ -268,14 +264,14 @@ cpufreq_stat_notifier_policy (struct notifier_block *nb, unsigned long val, table = cpufreq_frequency_get_table(cpu); if (!table) return 0; - if ((ret = cpufreq_stats_create_table(policy, table))) + ret = cpufreq_stats_create_table(policy, table); + if (ret) return ret; return 0; } -static int -cpufreq_stat_notifier_trans (struct notifier_block *nb, unsigned long val, - void *data) +static int cpufreq_stat_notifier_trans(struct notifier_block *nb, + unsigned long val, void *data) { struct cpufreq_freqs *freq = data; struct cpufreq_stats *stat; @@ -340,19 +336,20 @@ static struct notifier_block notifier_trans_block = { .notifier_call = cpufreq_stat_notifier_trans }; -static int -__init cpufreq_stats_init(void) +static int __init cpufreq_stats_init(void) { int ret; unsigned int cpu; spin_lock_init(&cpufreq_stats_lock); - if ((ret = cpufreq_register_notifier(¬ifier_policy_block, - CPUFREQ_POLICY_NOTIFIER))) + ret = cpufreq_register_notifier(¬ifier_policy_block, + CPUFREQ_POLICY_NOTIFIER); + if (ret) return ret; - if ((ret = cpufreq_register_notifier(¬ifier_trans_block, - CPUFREQ_TRANSITION_NOTIFIER))) { + ret = cpufreq_register_notifier(¬ifier_trans_block, + CPUFREQ_TRANSITION_NOTIFIER); + if (ret) { cpufreq_unregister_notifier(¬ifier_policy_block, CPUFREQ_POLICY_NOTIFIER); return ret; @@ -364,8 +361,7 @@ __init cpufreq_stats_init(void) } return 0; } -static void -__exit cpufreq_stats_exit(void) +static void __exit cpufreq_stats_exit(void) { unsigned int cpu; @@ -379,10 +375,10 @@ __exit cpufreq_stats_exit(void) } } -MODULE_AUTHOR ("Zou Nan hai <nanhai.zou@intel.com>"); -MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats " +MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>"); +MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats " "through sysfs filesystem"); -MODULE_LICENSE ("GPL"); +MODULE_LICENSE("GPL"); module_init(cpufreq_stats_init); module_exit(cpufreq_stats_exit); diff --git a/drivers/cpufreq/cpufreq_userspace.c b/drivers/cpufreq/cpufreq_userspace.c index 1442bbada053..66d2d1d6c80f 100644 --- a/drivers/cpufreq/cpufreq_userspace.c +++ b/drivers/cpufreq/cpufreq_userspace.c @@ -24,9 +24,6 @@ #include <linux/sysfs.h> #include <linux/mutex.h> -#include <asm/uaccess.h> - - /** * A few values needed by the userspace governor */ @@ -37,7 +34,7 @@ static DEFINE_PER_CPU(unsigned int, cpu_set_freq); /* CPU freq desired by userspace */ static DEFINE_PER_CPU(unsigned int, cpu_is_managed); -static DEFINE_MUTEX (userspace_mutex); +static DEFINE_MUTEX(userspace_mutex); static int cpus_using_userspace_governor; #define dprintk(msg...) \ @@ -46,9 +43,9 @@ static int cpus_using_userspace_governor; /* keep track of frequency transitions */ static int userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val, - void *data) + void *data) { - struct cpufreq_freqs *freq = data; + struct cpufreq_freqs *freq = data; if (!per_cpu(cpu_is_managed, freq->cpu)) return 0; @@ -57,11 +54,11 @@ userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val, freq->cpu, freq->new); per_cpu(cpu_cur_freq, freq->cpu) = freq->new; - return 0; + return 0; } static struct notifier_block userspace_cpufreq_notifier_block = { - .notifier_call = userspace_cpufreq_notifier + .notifier_call = userspace_cpufreq_notifier }; @@ -93,8 +90,11 @@ static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq) * We're safe from concurrent calls to ->target() here * as we hold the userspace_mutex lock. If we were calling * cpufreq_driver_target, a deadlock situation might occur: - * A: cpufreq_set (lock userspace_mutex) -> cpufreq_driver_target(lock policy->lock) - * B: cpufreq_set_policy(lock policy->lock) -> __cpufreq_governor -> cpufreq_governor_userspace (lock userspace_mutex) + * A: cpufreq_set (lock userspace_mutex) -> + * cpufreq_driver_target(lock policy->lock) + * B: cpufreq_set_policy(lock policy->lock) -> + * __cpufreq_governor -> + * cpufreq_governor_userspace (lock userspace_mutex) */ ret = __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L); @@ -210,9 +210,10 @@ static void __exit cpufreq_gov_userspace_exit(void) } -MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>, Russell King <rmk@arm.linux.org.uk>"); -MODULE_DESCRIPTION ("CPUfreq policy governor 'userspace'"); -MODULE_LICENSE ("GPL"); +MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>, " + "Russell King <rmk@arm.linux.org.uk>"); +MODULE_DESCRIPTION("CPUfreq policy governor 'userspace'"); +MODULE_LICENSE("GPL"); #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE fs_initcall(cpufreq_gov_userspace_init); diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c index 9071d80fbba2..a9bd3a05a684 100644 --- a/drivers/cpufreq/freq_table.c +++ b/drivers/cpufreq/freq_table.c @@ -28,7 +28,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, unsigned int max_freq = 0; unsigned int i; - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { unsigned int freq = table[i].frequency; if (freq == CPUFREQ_ENTRY_INVALID) { dprintk("table entry %u is invalid, skipping\n", i); @@ -70,7 +70,7 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { unsigned int freq = table[i].frequency; if (freq == CPUFREQ_ENTRY_INVALID) continue; @@ -125,13 +125,13 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy, if (!cpu_online(policy->cpu)) return -EINVAL; - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { unsigned int freq = table[i].frequency; if (freq == CPUFREQ_ENTRY_INVALID) continue; if ((freq < policy->min) || (freq > policy->max)) continue; - switch(relation) { + switch (relation) { case CPUFREQ_RELATION_H: if (freq <= target_freq) { if (freq >= optimal.frequency) { @@ -178,7 +178,7 @@ static DEFINE_PER_CPU(struct cpufreq_frequency_table *, show_table); /** * show_available_freqs - show available frequencies for the specified CPU */ -static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf) +static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf) { unsigned int i = 0; unsigned int cpu = policy->cpu; @@ -190,7 +190,7 @@ static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf) table = per_cpu(show_table, cpu); - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { if (table[i].frequency == CPUFREQ_ENTRY_INVALID) continue; count += sprintf(&buf[count], "%d ", table[i].frequency); @@ -234,6 +234,6 @@ struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu) } EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table); -MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>"); -MODULE_DESCRIPTION ("CPUfreq frequency table helpers"); -MODULE_LICENSE ("GPL"); +MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>"); +MODULE_DESCRIPTION("CPUfreq frequency table helpers"); +MODULE_LICENSE("GPL"); diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index e522144cba3a..01afd758072f 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -86,7 +86,7 @@ config ZCRYPT_MONOLITHIC config CRYPTO_SHA1_S390 tristate "SHA1 digest algorithm" depends on S390 - select CRYPTO_ALGAPI + select CRYPTO_HASH help This is the s390 hardware accelerated implementation of the SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2). @@ -94,7 +94,7 @@ config CRYPTO_SHA1_S390 config CRYPTO_SHA256_S390 tristate "SHA256 digest algorithm" depends on S390 - select CRYPTO_ALGAPI + select CRYPTO_HASH help This is the s390 hardware accelerated implementation of the SHA256 secure hash standard (DFIPS 180-2). @@ -105,7 +105,7 @@ config CRYPTO_SHA256_S390 config CRYPTO_SHA512_S390 tristate "SHA384 and SHA512 digest algorithm" depends on S390 - select CRYPTO_ALGAPI + select CRYPTO_HASH help This is the s390 hardware accelerated implementation of the SHA512 secure hash standard. @@ -200,4 +200,13 @@ config CRYPTO_DEV_IXP4XX help Driver for the IXP4xx NPE crypto engine. +config CRYPTO_DEV_PPC4XX + tristate "Driver AMCC PPC4xx crypto accelerator" + depends on PPC && 4xx + select CRYPTO_HASH + select CRYPTO_ALGAPI + select CRYPTO_BLKCIPHER + help + This option allows you to have support for AMCC crypto acceleration. + endif # CRYPTO_HW diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile index 73557b2968d3..9bf4a2bc8846 100644 --- a/drivers/crypto/Makefile +++ b/drivers/crypto/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_CRYPTO_DEV_GEODE) += geode-aes.o obj-$(CONFIG_CRYPTO_DEV_HIFN_795X) += hifn_795x.o obj-$(CONFIG_CRYPTO_DEV_TALITOS) += talitos.o obj-$(CONFIG_CRYPTO_DEV_IXP4XX) += ixp4xx_crypto.o +obj-$(CONFIG_CRYPTO_DEV_PPC4XX) += amcc/ diff --git a/drivers/crypto/amcc/Makefile b/drivers/crypto/amcc/Makefile new file mode 100644 index 000000000000..aa376e8d5ed5 --- /dev/null +++ b/drivers/crypto/amcc/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_CRYPTO_DEV_PPC4XX) += crypto4xx.o +crypto4xx-objs := crypto4xx_core.o crypto4xx_alg.o crypto4xx_sa.o diff --git a/drivers/crypto/amcc/crypto4xx_alg.c b/drivers/crypto/amcc/crypto4xx_alg.c new file mode 100644 index 000000000000..61b6e1bec8c6 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_alg.c @@ -0,0 +1,293 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This file implements the Linux crypto algorithms. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/spinlock_types.h> +#include <linux/scatterlist.h> +#include <linux/crypto.h> +#include <linux/hash.h> +#include <crypto/internal/hash.h> +#include <linux/dma-mapping.h> +#include <crypto/algapi.h> +#include <crypto/aes.h> +#include <crypto/sha.h> +#include "crypto4xx_reg_def.h" +#include "crypto4xx_sa.h" +#include "crypto4xx_core.h" + +void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h, + u32 save_iv, u32 ld_h, u32 ld_iv, u32 hdr_proc, + u32 h, u32 c, u32 pad_type, u32 op_grp, u32 op, + u32 dir) +{ + sa->sa_command_0.w = 0; + sa->sa_command_0.bf.save_hash_state = save_h; + sa->sa_command_0.bf.save_iv = save_iv; + sa->sa_command_0.bf.load_hash_state = ld_h; + sa->sa_command_0.bf.load_iv = ld_iv; + sa->sa_command_0.bf.hdr_proc = hdr_proc; + sa->sa_command_0.bf.hash_alg = h; + sa->sa_command_0.bf.cipher_alg = c; + sa->sa_command_0.bf.pad_type = pad_type & 3; + sa->sa_command_0.bf.extend_pad = pad_type >> 2; + sa->sa_command_0.bf.op_group = op_grp; + sa->sa_command_0.bf.opcode = op; + sa->sa_command_0.bf.dir = dir; +} + +void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, u32 hmac_mc, + u32 cfb, u32 esn, u32 sn_mask, u32 mute, + u32 cp_pad, u32 cp_pay, u32 cp_hdr) +{ + sa->sa_command_1.w = 0; + sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2; + sa->sa_command_1.bf.crypto_mode9_8 = cm & 3; + sa->sa_command_1.bf.feedback_mode = cfb, + sa->sa_command_1.bf.sa_rev = 1; + sa->sa_command_1.bf.extended_seq_num = esn; + sa->sa_command_1.bf.seq_num_mask = sn_mask; + sa->sa_command_1.bf.mutable_bit_proc = mute; + sa->sa_command_1.bf.copy_pad = cp_pad; + sa->sa_command_1.bf.copy_payload = cp_pay; + sa->sa_command_1.bf.copy_hdr = cp_hdr; +} + +int crypto4xx_encrypt(struct ablkcipher_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->direction = DIR_OUTBOUND; + ctx->hash_final = 0; + ctx->is_hash = 0; + ctx->pd_ctl = 0x1; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->nbytes, req->info, + get_dynamic_sa_iv_size(ctx)); +} + +int crypto4xx_decrypt(struct ablkcipher_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->direction = DIR_INBOUND; + ctx->hash_final = 0; + ctx->is_hash = 0; + ctx->pd_ctl = 1; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->nbytes, req->info, + get_dynamic_sa_iv_size(ctx)); +} + +/** + * AES Functions + */ +static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher, + const u8 *key, + unsigned int keylen, + unsigned char cm, + u8 fb) +{ + struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + int rc; + + if (keylen != AES_KEYSIZE_256 && + keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) { + crypto_ablkcipher_set_flags(cipher, + CRYPTO_TFM_RES_BAD_KEY_LEN); + return -EINVAL; + } + + /* Create SA */ + if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4); + if (rc) + return rc; + + if (ctx->state_record_dma_addr == 0) { + rc = crypto4xx_alloc_state_record(ctx); + if (rc) { + crypto4xx_free_sa(ctx); + return rc; + } + } + /* Setup SA */ + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + ctx->hash_final = 0; + + set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV, + SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, + SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, + SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, + SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT, + DIR_INBOUND); + + set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH, + fb, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx), + key, keylen); + sa->sa_contents = SA_AES_CONTENTS | (keylen << 2); + sa->sa_command_1.bf.key_len = keylen >> 3; + ctx->is_hash = 0; + ctx->direction = DIR_INBOUND; + memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx), + (void *)&ctx->state_record_dma_addr, 4); + ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx); + + memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); + sa = (struct dynamic_sa_ctl *) ctx->sa_out; + sa->sa_command_0.bf.dir = DIR_OUTBOUND; + + return 0; +} + +int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC, + CRYPTO_FEEDBACK_MODE_NO_FB); +} + +/** + * HASH SHA1 Functions + */ +static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm, + unsigned int sa_len, + unsigned char ha, + unsigned char hm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + struct dynamic_sa_hash160 *sa_in; + int rc; + + ctx->dev = my_alg->dev; + ctx->is_hash = 1; + ctx->hash_final = 0; + + /* Create SA */ + if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, sa_len); + if (rc) + return rc; + + if (ctx->state_record_dma_addr == 0) { + crypto4xx_alloc_state_record(ctx); + if (!ctx->state_record_dma_addr) { + crypto4xx_free_sa(ctx); + return -ENOMEM; + } + } + + tfm->crt_ahash.reqsize = sizeof(struct crypto4xx_ctx); + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA, + SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL, + SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, + SA_OPCODE_HASH, DIR_INBOUND); + set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + ctx->direction = DIR_INBOUND; + sa->sa_contents = SA_HASH160_CONTENTS; + sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in; + /* Need to zero hash digest in SA */ + memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest)); + memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest)); + sa_in->state_ptr = ctx->state_record_dma_addr; + ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx); + + return 0; +} + +int crypto4xx_hash_init(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + int ds; + struct dynamic_sa_ctl *sa; + + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + ds = crypto_ahash_digestsize( + __crypto_ahash_cast(req->base.tfm)); + sa->sa_command_0.bf.digest_len = ds >> 2; + sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA; + ctx->is_hash = 1; + ctx->direction = DIR_INBOUND; + + return 0; +} + +int crypto4xx_hash_update(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->is_hash = 1; + ctx->hash_final = 0; + ctx->pd_ctl = 0x11; + ctx->direction = DIR_INBOUND; + + return crypto4xx_build_pd(&req->base, ctx, req->src, + (struct scatterlist *) req->result, + req->nbytes, NULL, 0); +} + +int crypto4xx_hash_final(struct ahash_request *req) +{ + return 0; +} + +int crypto4xx_hash_digest(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->hash_final = 1; + ctx->pd_ctl = 0x11; + ctx->direction = DIR_INBOUND; + + return crypto4xx_build_pd(&req->base, ctx, req->src, + (struct scatterlist *) req->result, + req->nbytes, NULL, 0); +} + +/** + * SHA1 Algorithm + */ +int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm) +{ + return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1, + SA_HASH_MODE_HASH); +} + + diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c new file mode 100644 index 000000000000..4c0dfb2b872e --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_core.c @@ -0,0 +1,1310 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This file implements AMCC crypto offload Linux device driver for use with + * Linux CryptoAPI. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/spinlock_types.h> +#include <linux/random.h> +#include <linux/scatterlist.h> +#include <linux/crypto.h> +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/of_platform.h> +#include <asm/dcr.h> +#include <asm/dcr-regs.h> +#include <asm/cacheflush.h> +#include <crypto/internal/hash.h> +#include <crypto/algapi.h> +#include <crypto/aes.h> +#include <crypto/sha.h> +#include "crypto4xx_reg_def.h" +#include "crypto4xx_core.h" +#include "crypto4xx_sa.h" + +#define PPC4XX_SEC_VERSION_STR "0.5" + +/** + * PPC4xx Crypto Engine Initialization Routine + */ +static void crypto4xx_hw_init(struct crypto4xx_device *dev) +{ + union ce_ring_size ring_size; + union ce_ring_contol ring_ctrl; + union ce_part_ring_size part_ring_size; + union ce_io_threshold io_threshold; + u32 rand_num; + union ce_pe_dma_cfg pe_dma_cfg; + + writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG); + /* setup pe dma, include reset sg, pdr and pe, then release reset */ + pe_dma_cfg.w = 0; + pe_dma_cfg.bf.bo_sgpd_en = 1; + pe_dma_cfg.bf.bo_data_en = 0; + pe_dma_cfg.bf.bo_sa_en = 1; + pe_dma_cfg.bf.bo_pd_en = 1; + pe_dma_cfg.bf.dynamic_sa_en = 1; + pe_dma_cfg.bf.reset_sg = 1; + pe_dma_cfg.bf.reset_pdr = 1; + pe_dma_cfg.bf.reset_pe = 1; + writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); + /* un reset pe,sg and pdr */ + pe_dma_cfg.bf.pe_mode = 0; + pe_dma_cfg.bf.reset_sg = 0; + pe_dma_cfg.bf.reset_pdr = 0; + pe_dma_cfg.bf.reset_pe = 0; + pe_dma_cfg.bf.bo_td_en = 0; + writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); + writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE); + writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE); + writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL); + get_random_bytes(&rand_num, sizeof(rand_num)); + writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L); + get_random_bytes(&rand_num, sizeof(rand_num)); + writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H); + ring_size.w = 0; + ring_size.bf.ring_offset = PPC4XX_PD_SIZE; + ring_size.bf.ring_size = PPC4XX_NUM_PD; + writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE); + ring_ctrl.w = 0; + writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL); + writel(PPC4XX_DC_3DES_EN, dev->ce_base + CRYPTO4XX_DEVICE_CTRL); + writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE); + writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE); + part_ring_size.w = 0; + part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE; + part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE; + writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE); + writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG); + io_threshold.w = 0; + io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD; + io_threshold.bf.input_threshold = PPC4XX_INPUT_THRESHOLD; + writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD); + writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR); + writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR); + /* un reset pe,sg and pdr */ + pe_dma_cfg.bf.pe_mode = 1; + pe_dma_cfg.bf.reset_sg = 0; + pe_dma_cfg.bf.reset_pdr = 0; + pe_dma_cfg.bf.reset_pe = 0; + pe_dma_cfg.bf.bo_td_en = 0; + writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG); + /*clear all pending interrupt*/ + writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR); + writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); + writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); + writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG); + writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN); +} + +int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size) +{ + ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4, + &ctx->sa_in_dma_addr, GFP_ATOMIC); + if (ctx->sa_in == NULL) + return -ENOMEM; + + ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4, + &ctx->sa_out_dma_addr, GFP_ATOMIC); + if (ctx->sa_out == NULL) { + dma_free_coherent(ctx->dev->core_dev->device, + ctx->sa_len * 4, + ctx->sa_in, ctx->sa_in_dma_addr); + return -ENOMEM; + } + + memset(ctx->sa_in, 0, size * 4); + memset(ctx->sa_out, 0, size * 4); + ctx->sa_len = size; + + return 0; +} + +void crypto4xx_free_sa(struct crypto4xx_ctx *ctx) +{ + if (ctx->sa_in != NULL) + dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4, + ctx->sa_in, ctx->sa_in_dma_addr); + if (ctx->sa_out != NULL) + dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4, + ctx->sa_out, ctx->sa_out_dma_addr); + + ctx->sa_in_dma_addr = 0; + ctx->sa_out_dma_addr = 0; + ctx->sa_len = 0; +} + +u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx) +{ + ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device, + sizeof(struct sa_state_record), + &ctx->state_record_dma_addr, GFP_ATOMIC); + if (!ctx->state_record_dma_addr) + return -ENOMEM; + memset(ctx->state_record, 0, sizeof(struct sa_state_record)); + + return 0; +} + +void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx) +{ + if (ctx->state_record != NULL) + dma_free_coherent(ctx->dev->core_dev->device, + sizeof(struct sa_state_record), + ctx->state_record, + ctx->state_record_dma_addr); + ctx->state_record_dma_addr = 0; +} + +/** + * alloc memory for the gather ring + * no need to alloc buf for the ring + * gdr_tail, gdr_head and gdr_count are initialized by this function + */ +static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev) +{ + int i; + struct pd_uinfo *pd_uinfo; + dev->pdr = dma_alloc_coherent(dev->core_dev->device, + sizeof(struct ce_pd) * PPC4XX_NUM_PD, + &dev->pdr_pa, GFP_ATOMIC); + if (!dev->pdr) + return -ENOMEM; + + dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD, + GFP_KERNEL); + if (!dev->pdr_uinfo) { + dma_free_coherent(dev->core_dev->device, + sizeof(struct ce_pd) * PPC4XX_NUM_PD, + dev->pdr, + dev->pdr_pa); + return -ENOMEM; + } + memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD); + dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device, + 256 * PPC4XX_NUM_PD, + &dev->shadow_sa_pool_pa, + GFP_ATOMIC); + if (!dev->shadow_sa_pool) + return -ENOMEM; + + dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device, + sizeof(struct sa_state_record) * PPC4XX_NUM_PD, + &dev->shadow_sr_pool_pa, GFP_ATOMIC); + if (!dev->shadow_sr_pool) + return -ENOMEM; + for (i = 0; i < PPC4XX_NUM_PD; i++) { + pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo + + sizeof(struct pd_uinfo) * i); + + /* alloc 256 bytes which is enough for any kind of dynamic sa */ + pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i; + pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i; + + /* alloc state record */ + pd_uinfo->sr_va = dev->shadow_sr_pool + + sizeof(struct sa_state_record) * i; + pd_uinfo->sr_pa = dev->shadow_sr_pool_pa + + sizeof(struct sa_state_record) * i; + } + + return 0; +} + +static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev) +{ + if (dev->pdr != NULL) + dma_free_coherent(dev->core_dev->device, + sizeof(struct ce_pd) * PPC4XX_NUM_PD, + dev->pdr, dev->pdr_pa); + if (dev->shadow_sa_pool) + dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD, + dev->shadow_sa_pool, dev->shadow_sa_pool_pa); + if (dev->shadow_sr_pool) + dma_free_coherent(dev->core_dev->device, + sizeof(struct sa_state_record) * PPC4XX_NUM_PD, + dev->shadow_sr_pool, dev->shadow_sr_pool_pa); + + kfree(dev->pdr_uinfo); +} + +static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev) +{ + u32 retval; + u32 tmp; + + retval = dev->pdr_head; + tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD; + + if (tmp == dev->pdr_tail) + return ERING_WAS_FULL; + + dev->pdr_head = tmp; + + return retval; +} + +static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx) +{ + struct pd_uinfo *pd_uinfo; + unsigned long flags; + + pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo + + sizeof(struct pd_uinfo) * idx); + spin_lock_irqsave(&dev->core_dev->lock, flags); + if (dev->pdr_tail != PPC4XX_LAST_PD) + dev->pdr_tail++; + else + dev->pdr_tail = 0; + pd_uinfo->state = PD_ENTRY_FREE; + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + + return 0; +} + +static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev, + dma_addr_t *pd_dma, u32 idx) +{ + *pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx; + + return dev->pdr + sizeof(struct ce_pd) * idx; +} + +/** + * alloc memory for the gather ring + * no need to alloc buf for the ring + * gdr_tail, gdr_head and gdr_count are initialized by this function + */ +static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev) +{ + dev->gdr = dma_alloc_coherent(dev->core_dev->device, + sizeof(struct ce_gd) * PPC4XX_NUM_GD, + &dev->gdr_pa, GFP_ATOMIC); + if (!dev->gdr) + return -ENOMEM; + + memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD); + + return 0; +} + +static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev) +{ + dma_free_coherent(dev->core_dev->device, + sizeof(struct ce_gd) * PPC4XX_NUM_GD, + dev->gdr, dev->gdr_pa); +} + +/* + * when this function is called. + * preemption or interrupt must be disabled + */ +u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n) +{ + u32 retval; + u32 tmp; + if (n >= PPC4XX_NUM_GD) + return ERING_WAS_FULL; + + retval = dev->gdr_head; + tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD; + if (dev->gdr_head > dev->gdr_tail) { + if (tmp < dev->gdr_head && tmp >= dev->gdr_tail) + return ERING_WAS_FULL; + } else if (dev->gdr_head < dev->gdr_tail) { + if (tmp < dev->gdr_head || tmp >= dev->gdr_tail) + return ERING_WAS_FULL; + } + dev->gdr_head = tmp; + + return retval; +} + +static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->core_dev->lock, flags); + if (dev->gdr_tail == dev->gdr_head) { + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + return 0; + } + + if (dev->gdr_tail != PPC4XX_LAST_GD) + dev->gdr_tail++; + else + dev->gdr_tail = 0; + + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + + return 0; +} + +static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev, + dma_addr_t *gd_dma, u32 idx) +{ + *gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx; + + return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx); +} + +/** + * alloc memory for the scatter ring + * need to alloc buf for the ring + * sdr_tail, sdr_head and sdr_count are initialized by this function + */ +static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev) +{ + int i; + struct ce_sd *sd_array; + + /* alloc memory for scatter descriptor ring */ + dev->sdr = dma_alloc_coherent(dev->core_dev->device, + sizeof(struct ce_sd) * PPC4XX_NUM_SD, + &dev->sdr_pa, GFP_ATOMIC); + if (!dev->sdr) + return -ENOMEM; + + dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE; + dev->scatter_buffer_va = + dma_alloc_coherent(dev->core_dev->device, + dev->scatter_buffer_size * PPC4XX_NUM_SD, + &dev->scatter_buffer_pa, GFP_ATOMIC); + if (!dev->scatter_buffer_va) { + dma_free_coherent(dev->core_dev->device, + sizeof(struct ce_sd) * PPC4XX_NUM_SD, + dev->sdr, dev->sdr_pa); + return -ENOMEM; + } + + sd_array = dev->sdr; + + for (i = 0; i < PPC4XX_NUM_SD; i++) { + sd_array[i].ptr = dev->scatter_buffer_pa + + dev->scatter_buffer_size * i; + } + + return 0; +} + +static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev) +{ + if (dev->sdr != NULL) + dma_free_coherent(dev->core_dev->device, + sizeof(struct ce_sd) * PPC4XX_NUM_SD, + dev->sdr, dev->sdr_pa); + + if (dev->scatter_buffer_va != NULL) + dma_free_coherent(dev->core_dev->device, + dev->scatter_buffer_size * PPC4XX_NUM_SD, + dev->scatter_buffer_va, + dev->scatter_buffer_pa); +} + +/* + * when this function is called. + * preemption or interrupt must be disabled + */ +static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n) +{ + u32 retval; + u32 tmp; + + if (n >= PPC4XX_NUM_SD) + return ERING_WAS_FULL; + + retval = dev->sdr_head; + tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD; + if (dev->sdr_head > dev->gdr_tail) { + if (tmp < dev->sdr_head && tmp >= dev->sdr_tail) + return ERING_WAS_FULL; + } else if (dev->sdr_head < dev->sdr_tail) { + if (tmp < dev->sdr_head || tmp >= dev->sdr_tail) + return ERING_WAS_FULL; + } /* the head = tail, or empty case is already take cared */ + dev->sdr_head = tmp; + + return retval; +} + +static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->core_dev->lock, flags); + if (dev->sdr_tail == dev->sdr_head) { + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + return 0; + } + if (dev->sdr_tail != PPC4XX_LAST_SD) + dev->sdr_tail++; + else + dev->sdr_tail = 0; + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + + return 0; +} + +static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev, + dma_addr_t *sd_dma, u32 idx) +{ + *sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx; + + return (struct ce_sd *)(dev->sdr + sizeof(struct ce_sd) * idx); +} + +static u32 crypto4xx_fill_one_page(struct crypto4xx_device *dev, + dma_addr_t *addr, u32 *length, + u32 *idx, u32 *offset, u32 *nbytes) +{ + u32 len; + + if (*length > dev->scatter_buffer_size) { + memcpy(phys_to_virt(*addr), + dev->scatter_buffer_va + + *idx * dev->scatter_buffer_size + *offset, + dev->scatter_buffer_size); + *offset = 0; + *length -= dev->scatter_buffer_size; + *nbytes -= dev->scatter_buffer_size; + if (*idx == PPC4XX_LAST_SD) + *idx = 0; + else + (*idx)++; + *addr = *addr + dev->scatter_buffer_size; + return 1; + } else if (*length < dev->scatter_buffer_size) { + memcpy(phys_to_virt(*addr), + dev->scatter_buffer_va + + *idx * dev->scatter_buffer_size + *offset, *length); + if ((*offset + *length) == dev->scatter_buffer_size) { + if (*idx == PPC4XX_LAST_SD) + *idx = 0; + else + (*idx)++; + *nbytes -= *length; + *offset = 0; + } else { + *nbytes -= *length; + *offset += *length; + } + + return 0; + } else { + len = (*nbytes <= dev->scatter_buffer_size) ? + (*nbytes) : dev->scatter_buffer_size; + memcpy(phys_to_virt(*addr), + dev->scatter_buffer_va + + *idx * dev->scatter_buffer_size + *offset, + len); + *offset = 0; + *nbytes -= len; + + if (*idx == PPC4XX_LAST_SD) + *idx = 0; + else + (*idx)++; + + return 0; + } +} + +static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev, + struct ce_pd *pd, + struct pd_uinfo *pd_uinfo, + u32 nbytes, + struct scatterlist *dst) +{ + dma_addr_t addr; + u32 this_sd; + u32 offset; + u32 len; + u32 i; + u32 sg_len; + struct scatterlist *sg; + + this_sd = pd_uinfo->first_sd; + offset = 0; + i = 0; + + while (nbytes) { + sg = &dst[i]; + sg_len = sg->length; + addr = dma_map_page(dev->core_dev->device, sg_page(sg), + sg->offset, sg->length, DMA_TO_DEVICE); + + if (offset == 0) { + len = (nbytes <= sg->length) ? nbytes : sg->length; + while (crypto4xx_fill_one_page(dev, &addr, &len, + &this_sd, &offset, &nbytes)) + ; + if (!nbytes) + return; + i++; + } else { + len = (nbytes <= (dev->scatter_buffer_size - offset)) ? + nbytes : (dev->scatter_buffer_size - offset); + len = (sg->length < len) ? sg->length : len; + while (crypto4xx_fill_one_page(dev, &addr, &len, + &this_sd, &offset, &nbytes)) + ; + if (!nbytes) + return; + sg_len -= len; + if (sg_len) { + addr += len; + while (crypto4xx_fill_one_page(dev, &addr, + &sg_len, &this_sd, &offset, &nbytes)) + ; + } + i++; + } + } +} + +static u32 crypto4xx_copy_digest_to_dst(struct pd_uinfo *pd_uinfo, + struct crypto4xx_ctx *ctx) +{ + struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in; + struct sa_state_record *state_record = + (struct sa_state_record *) pd_uinfo->sr_va; + + if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) { + memcpy((void *) pd_uinfo->dest_va, state_record->save_digest, + SA_HASH_ALG_SHA1_DIGEST_SIZE); + } + + return 0; +} + +static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev, + struct pd_uinfo *pd_uinfo) +{ + int i; + if (pd_uinfo->num_gd) { + for (i = 0; i < pd_uinfo->num_gd; i++) + crypto4xx_put_gd_to_gdr(dev); + pd_uinfo->first_gd = 0xffffffff; + pd_uinfo->num_gd = 0; + } + if (pd_uinfo->num_sd) { + for (i = 0; i < pd_uinfo->num_sd; i++) + crypto4xx_put_sd_to_sdr(dev); + + pd_uinfo->first_sd = 0xffffffff; + pd_uinfo->num_sd = 0; + } +} + +static u32 crypto4xx_ablkcipher_done(struct crypto4xx_device *dev, + struct pd_uinfo *pd_uinfo, + struct ce_pd *pd) +{ + struct crypto4xx_ctx *ctx; + struct ablkcipher_request *ablk_req; + struct scatterlist *dst; + dma_addr_t addr; + + ablk_req = ablkcipher_request_cast(pd_uinfo->async_req); + ctx = crypto_tfm_ctx(ablk_req->base.tfm); + + if (pd_uinfo->using_sd) { + crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo, ablk_req->nbytes, + ablk_req->dst); + } else { + dst = pd_uinfo->dest_va; + addr = dma_map_page(dev->core_dev->device, sg_page(dst), + dst->offset, dst->length, DMA_FROM_DEVICE); + } + crypto4xx_ret_sg_desc(dev, pd_uinfo); + if (ablk_req->base.complete != NULL) + ablk_req->base.complete(&ablk_req->base, 0); + + return 0; +} + +static u32 crypto4xx_ahash_done(struct crypto4xx_device *dev, + struct pd_uinfo *pd_uinfo) +{ + struct crypto4xx_ctx *ctx; + struct ahash_request *ahash_req; + + ahash_req = ahash_request_cast(pd_uinfo->async_req); + ctx = crypto_tfm_ctx(ahash_req->base.tfm); + + crypto4xx_copy_digest_to_dst(pd_uinfo, + crypto_tfm_ctx(ahash_req->base.tfm)); + crypto4xx_ret_sg_desc(dev, pd_uinfo); + /* call user provided callback function x */ + if (ahash_req->base.complete != NULL) + ahash_req->base.complete(&ahash_req->base, 0); + + return 0; +} + +static u32 crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx) +{ + struct ce_pd *pd; + struct pd_uinfo *pd_uinfo; + + pd = dev->pdr + sizeof(struct ce_pd)*idx; + pd_uinfo = dev->pdr_uinfo + sizeof(struct pd_uinfo)*idx; + if (crypto_tfm_alg_type(pd_uinfo->async_req->tfm) == + CRYPTO_ALG_TYPE_ABLKCIPHER) + return crypto4xx_ablkcipher_done(dev, pd_uinfo, pd); + else + return crypto4xx_ahash_done(dev, pd_uinfo); +} + +/** + * Note: Only use this function to copy items that is word aligned. + */ +void crypto4xx_memcpy_le(unsigned int *dst, + const unsigned char *buf, + int len) +{ + u8 *tmp; + for (; len >= 4; buf += 4, len -= 4) + *dst++ = cpu_to_le32(*(unsigned int *) buf); + + tmp = (u8 *)dst; + switch (len) { + case 3: + *tmp++ = 0; + *tmp++ = *(buf+2); + *tmp++ = *(buf+1); + *tmp++ = *buf; + break; + case 2: + *tmp++ = 0; + *tmp++ = 0; + *tmp++ = *(buf+1); + *tmp++ = *buf; + break; + case 1: + *tmp++ = 0; + *tmp++ = 0; + *tmp++ = 0; + *tmp++ = *buf; + break; + default: + break; + } +} + +static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev) +{ + crypto4xx_destroy_pdr(core_dev->dev); + crypto4xx_destroy_gdr(core_dev->dev); + crypto4xx_destroy_sdr(core_dev->dev); + dev_set_drvdata(core_dev->device, NULL); + iounmap(core_dev->dev->ce_base); + kfree(core_dev->dev); + kfree(core_dev); +} + +void crypto4xx_return_pd(struct crypto4xx_device *dev, + u32 pd_entry, struct ce_pd *pd, + struct pd_uinfo *pd_uinfo) +{ + /* irq should be already disabled */ + dev->pdr_head = pd_entry; + pd->pd_ctl.w = 0; + pd->pd_ctl_len.w = 0; + pd_uinfo->state = PD_ENTRY_FREE; +} + +/* + * derive number of elements in scatterlist + * Shamlessly copy from talitos.c + */ +static int get_sg_count(struct scatterlist *sg_list, int nbytes) +{ + struct scatterlist *sg = sg_list; + int sg_nents = 0; + + while (nbytes) { + sg_nents++; + if (sg->length > nbytes) + break; + nbytes -= sg->length; + sg = sg_next(sg); + } + + return sg_nents; +} + +static u32 get_next_gd(u32 current) +{ + if (current != PPC4XX_LAST_GD) + return current + 1; + else + return 0; +} + +static u32 get_next_sd(u32 current) +{ + if (current != PPC4XX_LAST_SD) + return current + 1; + else + return 0; +} + +u32 crypto4xx_build_pd(struct crypto_async_request *req, + struct crypto4xx_ctx *ctx, + struct scatterlist *src, + struct scatterlist *dst, + unsigned int datalen, + void *iv, u32 iv_len) +{ + struct crypto4xx_device *dev = ctx->dev; + dma_addr_t addr, pd_dma, sd_dma, gd_dma; + struct dynamic_sa_ctl *sa; + struct scatterlist *sg; + struct ce_gd *gd; + struct ce_pd *pd; + u32 num_gd, num_sd; + u32 fst_gd = 0xffffffff; + u32 fst_sd = 0xffffffff; + u32 pd_entry; + unsigned long flags; + struct pd_uinfo *pd_uinfo = NULL; + unsigned int nbytes = datalen, idx; + unsigned int ivlen = 0; + u32 gd_idx = 0; + + /* figure how many gd is needed */ + num_gd = get_sg_count(src, datalen); + if (num_gd == 1) + num_gd = 0; + + /* figure how many sd is needed */ + if (sg_is_last(dst) || ctx->is_hash) { + num_sd = 0; + } else { + if (datalen > PPC4XX_SD_BUFFER_SIZE) { + num_sd = datalen / PPC4XX_SD_BUFFER_SIZE; + if (datalen % PPC4XX_SD_BUFFER_SIZE) + num_sd++; + } else { + num_sd = 1; + } + } + + /* + * The follow section of code needs to be protected + * The gather ring and scatter ring needs to be consecutive + * In case of run out of any kind of descriptor, the descriptor + * already got must be return the original place. + */ + spin_lock_irqsave(&dev->core_dev->lock, flags); + if (num_gd) { + fst_gd = crypto4xx_get_n_gd(dev, num_gd); + if (fst_gd == ERING_WAS_FULL) { + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + return -EAGAIN; + } + } + if (num_sd) { + fst_sd = crypto4xx_get_n_sd(dev, num_sd); + if (fst_sd == ERING_WAS_FULL) { + if (num_gd) + dev->gdr_head = fst_gd; + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + return -EAGAIN; + } + } + pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev); + if (pd_entry == ERING_WAS_FULL) { + if (num_gd) + dev->gdr_head = fst_gd; + if (num_sd) + dev->sdr_head = fst_sd; + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + return -EAGAIN; + } + spin_unlock_irqrestore(&dev->core_dev->lock, flags); + + pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo + + sizeof(struct pd_uinfo) * pd_entry); + pd = crypto4xx_get_pdp(dev, &pd_dma, pd_entry); + pd_uinfo->async_req = req; + pd_uinfo->num_gd = num_gd; + pd_uinfo->num_sd = num_sd; + + if (iv_len || ctx->is_hash) { + ivlen = iv_len; + pd->sa = pd_uinfo->sa_pa; + sa = (struct dynamic_sa_ctl *) pd_uinfo->sa_va; + if (ctx->direction == DIR_INBOUND) + memcpy(sa, ctx->sa_in, ctx->sa_len * 4); + else + memcpy(sa, ctx->sa_out, ctx->sa_len * 4); + + memcpy((void *) sa + ctx->offset_to_sr_ptr, + &pd_uinfo->sr_pa, 4); + + if (iv_len) + crypto4xx_memcpy_le(pd_uinfo->sr_va, iv, iv_len); + } else { + if (ctx->direction == DIR_INBOUND) { + pd->sa = ctx->sa_in_dma_addr; + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + } else { + pd->sa = ctx->sa_out_dma_addr; + sa = (struct dynamic_sa_ctl *) ctx->sa_out; + } + } + pd->sa_len = ctx->sa_len; + if (num_gd) { + /* get first gd we are going to use */ + gd_idx = fst_gd; + pd_uinfo->first_gd = fst_gd; + pd_uinfo->num_gd = num_gd; + gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx); + pd->src = gd_dma; + /* enable gather */ + sa->sa_command_0.bf.gather = 1; + idx = 0; + src = &src[0]; + /* walk the sg, and setup gather array */ + while (nbytes) { + sg = &src[idx]; + addr = dma_map_page(dev->core_dev->device, sg_page(sg), + sg->offset, sg->length, DMA_TO_DEVICE); + gd->ptr = addr; + gd->ctl_len.len = sg->length; + gd->ctl_len.done = 0; + gd->ctl_len.ready = 1; + if (sg->length >= nbytes) + break; + nbytes -= sg->length; + gd_idx = get_next_gd(gd_idx); + gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx); + idx++; + } + } else { + pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src), + src->offset, src->length, DMA_TO_DEVICE); + /* + * Disable gather in sa command + */ + sa->sa_command_0.bf.gather = 0; + /* + * Indicate gather array is not used + */ + pd_uinfo->first_gd = 0xffffffff; + pd_uinfo->num_gd = 0; + } + if (ctx->is_hash || sg_is_last(dst)) { + /* + * we know application give us dst a whole piece of memory + * no need to use scatter ring. + * In case of is_hash, the icv is always at end of src data. + */ + pd_uinfo->using_sd = 0; + pd_uinfo->first_sd = 0xffffffff; + pd_uinfo->num_sd = 0; + pd_uinfo->dest_va = dst; + sa->sa_command_0.bf.scatter = 0; + if (ctx->is_hash) + pd->dest = virt_to_phys((void *)dst); + else + pd->dest = (u32)dma_map_page(dev->core_dev->device, + sg_page(dst), dst->offset, + dst->length, DMA_TO_DEVICE); + } else { + struct ce_sd *sd = NULL; + u32 sd_idx = fst_sd; + nbytes = datalen; + sa->sa_command_0.bf.scatter = 1; + pd_uinfo->using_sd = 1; + pd_uinfo->dest_va = dst; + pd_uinfo->first_sd = fst_sd; + pd_uinfo->num_sd = num_sd; + sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx); + pd->dest = sd_dma; + /* setup scatter descriptor */ + sd->ctl.done = 0; + sd->ctl.rdy = 1; + /* sd->ptr should be setup by sd_init routine*/ + idx = 0; + if (nbytes >= PPC4XX_SD_BUFFER_SIZE) + nbytes -= PPC4XX_SD_BUFFER_SIZE; + else + nbytes = 0; + while (nbytes) { + sd_idx = get_next_sd(sd_idx); + sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx); + /* setup scatter descriptor */ + sd->ctl.done = 0; + sd->ctl.rdy = 1; + if (nbytes >= PPC4XX_SD_BUFFER_SIZE) + nbytes -= PPC4XX_SD_BUFFER_SIZE; + else + /* + * SD entry can hold PPC4XX_SD_BUFFER_SIZE, + * which is more than nbytes, so done. + */ + nbytes = 0; + } + } + + sa->sa_command_1.bf.hash_crypto_offset = 0; + pd->pd_ctl.w = ctx->pd_ctl; + pd->pd_ctl_len.w = 0x00400000 | (ctx->bypass << 24) | datalen; + pd_uinfo->state = PD_ENTRY_INUSE; + wmb(); + /* write any value to push engine to read a pd */ + writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD); + return -EINPROGRESS; +} + +/** + * Algorithm Registration Functions + */ +static int crypto4xx_alg_init(struct crypto_tfm *tfm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct crypto4xx_alg *amcc_alg = crypto_alg_to_crypto4xx_alg(alg); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + + ctx->dev = amcc_alg->dev; + ctx->sa_in = NULL; + ctx->sa_out = NULL; + ctx->sa_in_dma_addr = 0; + ctx->sa_out_dma_addr = 0; + ctx->sa_len = 0; + + if (alg->cra_type == &crypto_ablkcipher_type) + tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx); + else if (alg->cra_type == &crypto_ahash_type) + tfm->crt_ahash.reqsize = sizeof(struct crypto4xx_ctx); + + return 0; +} + +static void crypto4xx_alg_exit(struct crypto_tfm *tfm) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + + crypto4xx_free_sa(ctx); + crypto4xx_free_state_record(ctx); +} + +int crypto4xx_register_alg(struct crypto4xx_device *sec_dev, + struct crypto_alg *crypto_alg, int array_size) +{ + struct crypto4xx_alg *alg; + int i; + int rc = 0; + + for (i = 0; i < array_size; i++) { + alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL); + if (!alg) + return -ENOMEM; + + alg->alg = crypto_alg[i]; + INIT_LIST_HEAD(&alg->alg.cra_list); + if (alg->alg.cra_init == NULL) + alg->alg.cra_init = crypto4xx_alg_init; + if (alg->alg.cra_exit == NULL) + alg->alg.cra_exit = crypto4xx_alg_exit; + alg->dev = sec_dev; + rc = crypto_register_alg(&alg->alg); + if (rc) { + list_del(&alg->entry); + kfree(alg); + } else { + list_add_tail(&alg->entry, &sec_dev->alg_list); + } + } + + return 0; +} + +static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev) +{ + struct crypto4xx_alg *alg, *tmp; + + list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) { + list_del(&alg->entry); + crypto_unregister_alg(&alg->alg); + kfree(alg); + } +} + +static void crypto4xx_bh_tasklet_cb(unsigned long data) +{ + struct device *dev = (struct device *)data; + struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); + struct pd_uinfo *pd_uinfo; + struct ce_pd *pd; + u32 tail; + + while (core_dev->dev->pdr_head != core_dev->dev->pdr_tail) { + tail = core_dev->dev->pdr_tail; + pd_uinfo = core_dev->dev->pdr_uinfo + + sizeof(struct pd_uinfo)*tail; + pd = core_dev->dev->pdr + sizeof(struct ce_pd) * tail; + if ((pd_uinfo->state == PD_ENTRY_INUSE) && + pd->pd_ctl.bf.pe_done && + !pd->pd_ctl.bf.host_ready) { + pd->pd_ctl.bf.pe_done = 0; + crypto4xx_pd_done(core_dev->dev, tail); + crypto4xx_put_pd_to_pdr(core_dev->dev, tail); + pd_uinfo->state = PD_ENTRY_FREE; + } else { + /* if tail not done, break */ + break; + } + } +} + +/** + * Top Half of isr. + */ +static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data) +{ + struct device *dev = (struct device *)data; + struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); + + if (core_dev->dev->ce_base == 0) + return 0; + + writel(PPC4XX_INTERRUPT_CLR, + core_dev->dev->ce_base + CRYPTO4XX_INT_CLR); + tasklet_schedule(&core_dev->tasklet); + + return IRQ_HANDLED; +} + +/** + * Supported Crypto Algorithms + */ +struct crypto_alg crypto4xx_alg[] = { + /* Crypto AES modes */ + { + .cra_name = "cbc(aes)", + .cra_driver_name = "cbc-aes-ppc4xx", + .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto4xx_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_ablkcipher_type, + .cra_module = THIS_MODULE, + .cra_u = { + .ablkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_IV_SIZE, + .setkey = crypto4xx_setkey_aes_cbc, + .encrypt = crypto4xx_encrypt, + .decrypt = crypto4xx_decrypt, + } + } + }, + /* Hash SHA1 */ + { + .cra_name = "sha1", + .cra_driver_name = "sha1-ppc4xx", + .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto4xx_ctx), + .cra_alignmask = 0, + .cra_type = &crypto_ahash_type, + .cra_init = crypto4xx_sha1_alg_init, + .cra_module = THIS_MODULE, + .cra_u = { + .ahash = { + .digestsize = SHA1_DIGEST_SIZE, + .init = crypto4xx_hash_init, + .update = crypto4xx_hash_update, + .final = crypto4xx_hash_final, + .digest = crypto4xx_hash_digest, + } + } + }, +}; + +/** + * Module Initialization Routine + */ +static int __init crypto4xx_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + int rc; + struct resource res; + struct device *dev = &ofdev->dev; + struct crypto4xx_core_device *core_dev; + + rc = of_address_to_resource(ofdev->node, 0, &res); + if (rc) + return -ENODEV; + + if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) { + mtdcri(SDR0, PPC460EX_SDR0_SRST, + mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET); + mtdcri(SDR0, PPC460EX_SDR0_SRST, + mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET); + } else if (of_find_compatible_node(NULL, NULL, + "amcc,ppc405ex-crypto")) { + mtdcri(SDR0, PPC405EX_SDR0_SRST, + mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET); + mtdcri(SDR0, PPC405EX_SDR0_SRST, + mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET); + } else if (of_find_compatible_node(NULL, NULL, + "amcc,ppc460sx-crypto")) { + mtdcri(SDR0, PPC460SX_SDR0_SRST, + mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET); + mtdcri(SDR0, PPC460SX_SDR0_SRST, + mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET); + } else { + printk(KERN_ERR "Crypto Function Not supported!\n"); + return -EINVAL; + } + + core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL); + if (!core_dev) + return -ENOMEM; + + dev_set_drvdata(dev, core_dev); + core_dev->ofdev = ofdev; + core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL); + if (!core_dev->dev) + goto err_alloc_dev; + + core_dev->dev->core_dev = core_dev; + core_dev->device = dev; + spin_lock_init(&core_dev->lock); + INIT_LIST_HEAD(&core_dev->dev->alg_list); + rc = crypto4xx_build_pdr(core_dev->dev); + if (rc) + goto err_build_pdr; + + rc = crypto4xx_build_gdr(core_dev->dev); + if (rc) + goto err_build_gdr; + + rc = crypto4xx_build_sdr(core_dev->dev); + if (rc) + goto err_build_sdr; + + /* Init tasklet for bottom half processing */ + tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb, + (unsigned long) dev); + + /* Register for Crypto isr, Crypto Engine IRQ */ + core_dev->irq = irq_of_parse_and_map(ofdev->node, 0); + rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0, + core_dev->dev->name, dev); + if (rc) + goto err_request_irq; + + core_dev->dev->ce_base = of_iomap(ofdev->node, 0); + if (!core_dev->dev->ce_base) { + dev_err(dev, "failed to of_iomap\n"); + goto err_iomap; + } + + /* need to setup pdr, rdr, gdr and sdr before this */ + crypto4xx_hw_init(core_dev->dev); + + /* Register security algorithms with Linux CryptoAPI */ + rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg, + ARRAY_SIZE(crypto4xx_alg)); + if (rc) + goto err_start_dev; + + return 0; + +err_start_dev: + iounmap(core_dev->dev->ce_base); +err_iomap: + free_irq(core_dev->irq, dev); + irq_dispose_mapping(core_dev->irq); + tasklet_kill(&core_dev->tasklet); +err_request_irq: + crypto4xx_destroy_sdr(core_dev->dev); +err_build_sdr: + crypto4xx_destroy_gdr(core_dev->dev); +err_build_gdr: + crypto4xx_destroy_pdr(core_dev->dev); +err_build_pdr: + kfree(core_dev->dev); +err_alloc_dev: + kfree(core_dev); + + return rc; +} + +static int __exit crypto4xx_remove(struct of_device *ofdev) +{ + struct device *dev = &ofdev->dev; + struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); + + free_irq(core_dev->irq, dev); + irq_dispose_mapping(core_dev->irq); + + tasklet_kill(&core_dev->tasklet); + /* Un-register with Linux CryptoAPI */ + crypto4xx_unregister_alg(core_dev->dev); + /* Free all allocated memory */ + crypto4xx_stop_all(core_dev); + + return 0; +} + +static struct of_device_id crypto4xx_match[] = { + { .compatible = "amcc,ppc4xx-crypto",}, + { }, +}; + +static struct of_platform_driver crypto4xx_driver = { + .name = "crypto4xx", + .match_table = crypto4xx_match, + .probe = crypto4xx_probe, + .remove = crypto4xx_remove, +}; + +static int __init crypto4xx_init(void) +{ + return of_register_platform_driver(&crypto4xx_driver); +} + +static void __exit crypto4xx_exit(void) +{ + of_unregister_platform_driver(&crypto4xx_driver); +} + +module_init(crypto4xx_init); +module_exit(crypto4xx_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>"); +MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator"); + diff --git a/drivers/crypto/amcc/crypto4xx_core.h b/drivers/crypto/amcc/crypto4xx_core.h new file mode 100644 index 000000000000..1ef103449364 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_core.h @@ -0,0 +1,177 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This is the header file for AMCC Crypto offload Linux device driver for + * use with Linux CryptoAPI. + + */ + +#ifndef __CRYPTO4XX_CORE_H__ +#define __CRYPTO4XX_CORE_H__ + +#define PPC460SX_SDR0_SRST 0x201 +#define PPC405EX_SDR0_SRST 0x200 +#define PPC460EX_SDR0_SRST 0x201 +#define PPC460EX_CE_RESET 0x08000000 +#define PPC460SX_CE_RESET 0x20000000 +#define PPC405EX_CE_RESET 0x00000008 + +#define CRYPTO4XX_CRYPTO_PRIORITY 300 +#define PPC4XX_LAST_PD 63 +#define PPC4XX_NUM_PD 64 +#define PPC4XX_LAST_GD 1023 +#define PPC4XX_NUM_GD 1024 +#define PPC4XX_LAST_SD 63 +#define PPC4XX_NUM_SD 64 +#define PPC4XX_SD_BUFFER_SIZE 2048 + +#define PD_ENTRY_INUSE 1 +#define PD_ENTRY_FREE 0 +#define ERING_WAS_FULL 0xffffffff + +struct crypto4xx_device; + +struct pd_uinfo { + struct crypto4xx_device *dev; + u32 state; + u32 using_sd; + u32 first_gd; /* first gather discriptor + used by this packet */ + u32 num_gd; /* number of gather discriptor + used by this packet */ + u32 first_sd; /* first scatter discriptor + used by this packet */ + u32 num_sd; /* number of scatter discriptors + used by this packet */ + void *sa_va; /* shadow sa, when using cp from ctx->sa */ + u32 sa_pa; + void *sr_va; /* state record for shadow sa */ + u32 sr_pa; + struct scatterlist *dest_va; + struct crypto_async_request *async_req; /* base crypto request + for this packet */ +}; + +struct crypto4xx_device { + struct crypto4xx_core_device *core_dev; + char *name; + u64 ce_phy_address; + void __iomem *ce_base; + + void *pdr; /* base address of packet + descriptor ring */ + dma_addr_t pdr_pa; /* physical address used to + program ce pdr_base_register */ + void *gdr; /* gather descriptor ring */ + dma_addr_t gdr_pa; /* physical address used to + program ce gdr_base_register */ + void *sdr; /* scatter descriptor ring */ + dma_addr_t sdr_pa; /* physical address used to + program ce sdr_base_register */ + void *scatter_buffer_va; + dma_addr_t scatter_buffer_pa; + u32 scatter_buffer_size; + + void *shadow_sa_pool; /* pool of memory for sa in pd_uinfo */ + dma_addr_t shadow_sa_pool_pa; + void *shadow_sr_pool; /* pool of memory for sr in pd_uinfo */ + dma_addr_t shadow_sr_pool_pa; + u32 pdr_tail; + u32 pdr_head; + u32 gdr_tail; + u32 gdr_head; + u32 sdr_tail; + u32 sdr_head; + void *pdr_uinfo; + struct list_head alg_list; /* List of algorithm supported + by this device */ +}; + +struct crypto4xx_core_device { + struct device *device; + struct of_device *ofdev; + struct crypto4xx_device *dev; + u32 int_status; + u32 irq; + struct tasklet_struct tasklet; + spinlock_t lock; +}; + +struct crypto4xx_ctx { + struct crypto4xx_device *dev; + void *sa_in; + dma_addr_t sa_in_dma_addr; + void *sa_out; + dma_addr_t sa_out_dma_addr; + void *state_record; + dma_addr_t state_record_dma_addr; + u32 sa_len; + u32 offset_to_sr_ptr; /* offset to state ptr, in dynamic sa */ + u32 direction; + u32 next_hdr; + u32 save_iv; + u32 pd_ctl_len; + u32 pd_ctl; + u32 bypass; + u32 is_hash; + u32 hash_final; +}; + +struct crypto4xx_req_ctx { + struct crypto4xx_device *dev; /* Device in which + operation to send to */ + void *sa; + u32 sa_dma_addr; + u16 sa_len; +}; + +struct crypto4xx_alg { + struct list_head entry; + struct crypto_alg alg; + struct crypto4xx_device *dev; +}; + +#define crypto_alg_to_crypto4xx_alg(x) \ + container_of(x, struct crypto4xx_alg, alg) + +extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size); +extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx); +extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx, + struct crypto4xx_ctx *rctx); +extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx); +extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx); +extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx); +extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx); +extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx); +extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx); +extern void crypto4xx_memcpy_le(unsigned int *dst, + const unsigned char *buf, int len); +extern u32 crypto4xx_build_pd(struct crypto_async_request *req, + struct crypto4xx_ctx *ctx, + struct scatterlist *src, + struct scatterlist *dst, + unsigned int datalen, + void *iv, u32 iv_len); +extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen); +extern int crypto4xx_encrypt(struct ablkcipher_request *req); +extern int crypto4xx_decrypt(struct ablkcipher_request *req); +extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm); +extern int crypto4xx_hash_digest(struct ahash_request *req); +extern int crypto4xx_hash_final(struct ahash_request *req); +extern int crypto4xx_hash_update(struct ahash_request *req); +extern int crypto4xx_hash_init(struct ahash_request *req); +#endif diff --git a/drivers/crypto/amcc/crypto4xx_reg_def.h b/drivers/crypto/amcc/crypto4xx_reg_def.h new file mode 100644 index 000000000000..7d4edb002619 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_reg_def.h @@ -0,0 +1,284 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This filr defines the register set for Security Subsystem + */ + +#ifndef __CRYPTO4XX_REG_DEF_H__ +#define __CRYPTO4XX_REG_DEF_H__ + +/* CRYPTO4XX Register offset */ +#define CRYPTO4XX_DESCRIPTOR 0x00000000 +#define CRYPTO4XX_CTRL_STAT 0x00000000 +#define CRYPTO4XX_SOURCE 0x00000004 +#define CRYPTO4XX_DEST 0x00000008 +#define CRYPTO4XX_SA 0x0000000C +#define CRYPTO4XX_SA_LENGTH 0x00000010 +#define CRYPTO4XX_LENGTH 0x00000014 + +#define CRYPTO4XX_PE_DMA_CFG 0x00000040 +#define CRYPTO4XX_PE_DMA_STAT 0x00000044 +#define CRYPTO4XX_PDR_BASE 0x00000048 +#define CRYPTO4XX_RDR_BASE 0x0000004c +#define CRYPTO4XX_RING_SIZE 0x00000050 +#define CRYPTO4XX_RING_CTRL 0x00000054 +#define CRYPTO4XX_INT_RING_STAT 0x00000058 +#define CRYPTO4XX_EXT_RING_STAT 0x0000005c +#define CRYPTO4XX_IO_THRESHOLD 0x00000060 +#define CRYPTO4XX_GATH_RING_BASE 0x00000064 +#define CRYPTO4XX_SCAT_RING_BASE 0x00000068 +#define CRYPTO4XX_PART_RING_SIZE 0x0000006c +#define CRYPTO4XX_PART_RING_CFG 0x00000070 + +#define CRYPTO4XX_PDR_BASE_UADDR 0x00000080 +#define CRYPTO4XX_RDR_BASE_UADDR 0x00000084 +#define CRYPTO4XX_PKT_SRC_UADDR 0x00000088 +#define CRYPTO4XX_PKT_DEST_UADDR 0x0000008c +#define CRYPTO4XX_SA_UADDR 0x00000090 +#define CRYPTO4XX_GATH_RING_BASE_UADDR 0x000000A0 +#define CRYPTO4XX_SCAT_RING_BASE_UADDR 0x000000A4 + +#define CRYPTO4XX_SEQ_RD 0x00000408 +#define CRYPTO4XX_SEQ_MASK_RD 0x0000040C + +#define CRYPTO4XX_SA_CMD_0 0x00010600 +#define CRYPTO4XX_SA_CMD_1 0x00010604 + +#define CRYPTO4XX_STATE_PTR 0x000106dc +#define CRYPTO4XX_STATE_IV 0x00010700 +#define CRYPTO4XX_STATE_HASH_BYTE_CNT_0 0x00010710 +#define CRYPTO4XX_STATE_HASH_BYTE_CNT_1 0x00010714 + +#define CRYPTO4XX_STATE_IDIGEST_0 0x00010718 +#define CRYPTO4XX_STATE_IDIGEST_1 0x0001071c + +#define CRYPTO4XX_DATA_IN 0x00018000 +#define CRYPTO4XX_DATA_OUT 0x0001c000 + +#define CRYPTO4XX_INT_UNMASK_STAT 0x000500a0 +#define CRYPTO4XX_INT_MASK_STAT 0x000500a4 +#define CRYPTO4XX_INT_CLR 0x000500a4 +#define CRYPTO4XX_INT_EN 0x000500a8 + +#define CRYPTO4XX_INT_PKA 0x00000002 +#define CRYPTO4XX_INT_PDR_DONE 0x00008000 +#define CRYPTO4XX_INT_MA_WR_ERR 0x00020000 +#define CRYPTO4XX_INT_MA_RD_ERR 0x00010000 +#define CRYPTO4XX_INT_PE_ERR 0x00000200 +#define CRYPTO4XX_INT_USER_DMA_ERR 0x00000040 +#define CRYPTO4XX_INT_SLAVE_ERR 0x00000010 +#define CRYPTO4XX_INT_MASTER_ERR 0x00000008 +#define CRYPTO4XX_INT_ERROR 0x00030258 + +#define CRYPTO4XX_INT_CFG 0x000500ac +#define CRYPTO4XX_INT_DESCR_RD 0x000500b0 +#define CRYPTO4XX_INT_DESCR_CNT 0x000500b4 +#define CRYPTO4XX_INT_TIMEOUT_CNT 0x000500b8 + +#define CRYPTO4XX_DEVICE_CTRL 0x00060080 +#define CRYPTO4XX_DEVICE_ID 0x00060084 +#define CRYPTO4XX_DEVICE_INFO 0x00060088 +#define CRYPTO4XX_DMA_USER_SRC 0x00060094 +#define CRYPTO4XX_DMA_USER_DEST 0x00060098 +#define CRYPTO4XX_DMA_USER_CMD 0x0006009C + +#define CRYPTO4XX_DMA_CFG 0x000600d4 +#define CRYPTO4XX_BYTE_ORDER_CFG 0x000600d8 +#define CRYPTO4XX_ENDIAN_CFG 0x000600d8 + +#define CRYPTO4XX_PRNG_STAT 0x00070000 +#define CRYPTO4XX_PRNG_CTRL 0x00070004 +#define CRYPTO4XX_PRNG_SEED_L 0x00070008 +#define CRYPTO4XX_PRNG_SEED_H 0x0007000c + +#define CRYPTO4XX_PRNG_RES_0 0x00070020 +#define CRYPTO4XX_PRNG_RES_1 0x00070024 +#define CRYPTO4XX_PRNG_RES_2 0x00070028 +#define CRYPTO4XX_PRNG_RES_3 0x0007002C + +#define CRYPTO4XX_PRNG_LFSR_L 0x00070030 +#define CRYPTO4XX_PRNG_LFSR_H 0x00070034 + +/** + * Initilize CRYPTO ENGINE registers, and memory bases. + */ +#define PPC4XX_PDR_POLL 0x3ff +#define PPC4XX_OUTPUT_THRESHOLD 2 +#define PPC4XX_INPUT_THRESHOLD 2 +#define PPC4XX_PD_SIZE 6 +#define PPC4XX_CTX_DONE_INT 0x2000 +#define PPC4XX_PD_DONE_INT 0x8000 +#define PPC4XX_BYTE_ORDER 0x22222 +#define PPC4XX_INTERRUPT_CLR 0x3ffff +#define PPC4XX_PRNG_CTRL_AUTO_EN 0x3 +#define PPC4XX_DC_3DES_EN 1 +#define PPC4XX_INT_DESCR_CNT 4 +#define PPC4XX_INT_TIMEOUT_CNT 0 +#define PPC4XX_INT_CFG 1 +/** + * all follow define are ad hoc + */ +#define PPC4XX_RING_RETRY 100 +#define PPC4XX_RING_POLL 100 +#define PPC4XX_SDR_SIZE PPC4XX_NUM_SD +#define PPC4XX_GDR_SIZE PPC4XX_NUM_GD + +/** + * Generic Security Association (SA) with all possible fields. These will + * never likely used except for reference purpose. These structure format + * can be not changed as the hardware expects them to be layout as defined. + * Field can be removed or reduced but ordering can not be changed. + */ +#define CRYPTO4XX_DMA_CFG_OFFSET 0x40 +union ce_pe_dma_cfg { + struct { + u32 rsv:7; + u32 dir_host:1; + u32 rsv1:2; + u32 bo_td_en:1; + u32 dis_pdr_upd:1; + u32 bo_sgpd_en:1; + u32 bo_data_en:1; + u32 bo_sa_en:1; + u32 bo_pd_en:1; + u32 rsv2:4; + u32 dynamic_sa_en:1; + u32 pdr_mode:2; + u32 pe_mode:1; + u32 rsv3:5; + u32 reset_sg:1; + u32 reset_pdr:1; + u32 reset_pe:1; + } bf; + u32 w; +} __attribute__((packed)); + +#define CRYPTO4XX_PDR_BASE_OFFSET 0x48 +#define CRYPTO4XX_RDR_BASE_OFFSET 0x4c +#define CRYPTO4XX_RING_SIZE_OFFSET 0x50 +union ce_ring_size { + struct { + u32 ring_offset:16; + u32 rsv:6; + u32 ring_size:10; + } bf; + u32 w; +} __attribute__((packed)); + +#define CRYPTO4XX_RING_CONTROL_OFFSET 0x54 +union ce_ring_contol { + struct { + u32 continuous:1; + u32 rsv:5; + u32 ring_retry_divisor:10; + u32 rsv1:4; + u32 ring_poll_divisor:10; + } bf; + u32 w; +} __attribute__((packed)); + +#define CRYPTO4XX_IO_THRESHOLD_OFFSET 0x60 +union ce_io_threshold { + struct { + u32 rsv:6; + u32 output_threshold:10; + u32 rsv1:6; + u32 input_threshold:10; + } bf; + u32 w; +} __attribute__((packed)); + +#define CRYPTO4XX_GATHER_RING_BASE_OFFSET 0x64 +#define CRYPTO4XX_SCATTER_RING_BASE_OFFSET 0x68 + +union ce_part_ring_size { + struct { + u32 sdr_size:16; + u32 gdr_size:16; + } bf; + u32 w; +} __attribute__((packed)); + +#define MAX_BURST_SIZE_32 0 +#define MAX_BURST_SIZE_64 1 +#define MAX_BURST_SIZE_128 2 +#define MAX_BURST_SIZE_256 3 + +/* gather descriptor control length */ +struct gd_ctl_len { + u32 len:16; + u32 rsv:14; + u32 done:1; + u32 ready:1; +} __attribute__((packed)); + +struct ce_gd { + u32 ptr; + struct gd_ctl_len ctl_len; +} __attribute__((packed)); + +struct sd_ctl { + u32 ctl:30; + u32 done:1; + u32 rdy:1; +} __attribute__((packed)); + +struct ce_sd { + u32 ptr; + struct sd_ctl ctl; +} __attribute__((packed)); + +#define PD_PAD_CTL_32 0x10 +#define PD_PAD_CTL_64 0x20 +#define PD_PAD_CTL_128 0x40 +#define PD_PAD_CTL_256 0x80 +union ce_pd_ctl { + struct { + u32 pd_pad_ctl:8; + u32 status:8; + u32 next_hdr:8; + u32 rsv:2; + u32 cached_sa:1; + u32 hash_final:1; + u32 init_arc4:1; + u32 rsv1:1; + u32 pe_done:1; + u32 host_ready:1; + } bf; + u32 w; +} __attribute__((packed)); + +union ce_pd_ctl_len { + struct { + u32 bypass:8; + u32 pe_done:1; + u32 host_ready:1; + u32 rsv:2; + u32 pkt_len:20; + } bf; + u32 w; +} __attribute__((packed)); + +struct ce_pd { + union ce_pd_ctl pd_ctl; + u32 src; + u32 dest; + u32 sa; /* get from ctx->sa_dma_addr */ + u32 sa_len; /* only if dynamic sa is used */ + union ce_pd_ctl_len pd_ctl_len; + +} __attribute__((packed)); +#endif diff --git a/drivers/crypto/amcc/crypto4xx_sa.c b/drivers/crypto/amcc/crypto4xx_sa.c new file mode 100644 index 000000000000..466fd94cd4a3 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_sa.c @@ -0,0 +1,108 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * @file crypto4xx_sa.c + * + * This file implements the security context + * assoicate format. + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/mod_devicetable.h> +#include <linux/interrupt.h> +#include <linux/spinlock_types.h> +#include <linux/highmem.h> +#include <linux/scatterlist.h> +#include <linux/crypto.h> +#include <crypto/algapi.h> +#include <crypto/des.h> +#include "crypto4xx_reg_def.h" +#include "crypto4xx_sa.h" +#include "crypto4xx_core.h" + +u32 get_dynamic_sa_offset_iv_field(struct crypto4xx_ctx *ctx) +{ + u32 offset; + union dynamic_sa_contents cts; + + if (ctx->direction == DIR_INBOUND) + cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_in))->sa_contents; + else + cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_out))->sa_contents; + offset = cts.bf.key_size + + cts.bf.inner_size + + cts.bf.outer_size + + cts.bf.spi + + cts.bf.seq_num0 + + cts.bf.seq_num1 + + cts.bf.seq_num_mask0 + + cts.bf.seq_num_mask1 + + cts.bf.seq_num_mask2 + + cts.bf.seq_num_mask3; + + return sizeof(struct dynamic_sa_ctl) + offset * 4; +} + +u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx) +{ + u32 offset; + union dynamic_sa_contents cts; + + if (ctx->direction == DIR_INBOUND) + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; + else + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; + offset = cts.bf.key_size + + cts.bf.inner_size + + cts.bf.outer_size + + cts.bf.spi + + cts.bf.seq_num0 + + cts.bf.seq_num1 + + cts.bf.seq_num_mask0 + + cts.bf.seq_num_mask1 + + cts.bf.seq_num_mask2 + + cts.bf.seq_num_mask3 + + cts.bf.iv0 + + cts.bf.iv1 + + cts.bf.iv2 + + cts.bf.iv3; + + return sizeof(struct dynamic_sa_ctl) + offset * 4; +} + +u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx) +{ + union dynamic_sa_contents cts; + + if (ctx->direction == DIR_INBOUND) + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; + else + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; + return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4; +} + +u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx) +{ + union dynamic_sa_contents cts; + + if (ctx->direction == DIR_INBOUND) + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents; + else + cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents; + + return sizeof(struct dynamic_sa_ctl); +} diff --git a/drivers/crypto/amcc/crypto4xx_sa.h b/drivers/crypto/amcc/crypto4xx_sa.h new file mode 100644 index 000000000000..4b83ed7e5570 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_sa.h @@ -0,0 +1,243 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This file defines the security context + * assoicate format. + */ + +#ifndef __CRYPTO4XX_SA_H__ +#define __CRYPTO4XX_SA_H__ + +#define AES_IV_SIZE 16 + +/** + * Contents of Dynamic Security Association (SA) with all possible fields + */ +union dynamic_sa_contents { + struct { + u32 arc4_state_ptr:1; + u32 arc4_ij_ptr:1; + u32 state_ptr:1; + u32 iv3:1; + u32 iv2:1; + u32 iv1:1; + u32 iv0:1; + u32 seq_num_mask3:1; + u32 seq_num_mask2:1; + u32 seq_num_mask1:1; + u32 seq_num_mask0:1; + u32 seq_num1:1; + u32 seq_num0:1; + u32 spi:1; + u32 outer_size:5; + u32 inner_size:5; + u32 key_size:4; + u32 cmd_size:4; + } bf; + u32 w; +} __attribute__((packed)); + +#define DIR_OUTBOUND 0 +#define DIR_INBOUND 1 +#define SA_OP_GROUP_BASIC 0 +#define SA_OPCODE_ENCRYPT 0 +#define SA_OPCODE_DECRYPT 0 +#define SA_OPCODE_HASH 3 +#define SA_CIPHER_ALG_DES 0 +#define SA_CIPHER_ALG_3DES 1 +#define SA_CIPHER_ALG_ARC4 2 +#define SA_CIPHER_ALG_AES 3 +#define SA_CIPHER_ALG_KASUMI 4 +#define SA_CIPHER_ALG_NULL 15 + +#define SA_HASH_ALG_MD5 0 +#define SA_HASH_ALG_SHA1 1 +#define SA_HASH_ALG_NULL 15 +#define SA_HASH_ALG_SHA1_DIGEST_SIZE 20 + +#define SA_LOAD_HASH_FROM_SA 0 +#define SA_LOAD_HASH_FROM_STATE 2 +#define SA_NOT_LOAD_HASH 3 +#define SA_LOAD_IV_FROM_SA 0 +#define SA_LOAD_IV_FROM_INPUT 1 +#define SA_LOAD_IV_FROM_STATE 2 +#define SA_LOAD_IV_GEN_IV 3 + +#define SA_PAD_TYPE_CONSTANT 2 +#define SA_PAD_TYPE_ZERO 3 +#define SA_PAD_TYPE_TLS 5 +#define SA_PAD_TYPE_DTLS 5 +#define SA_NOT_SAVE_HASH 0 +#define SA_SAVE_HASH 1 +#define SA_NOT_SAVE_IV 0 +#define SA_SAVE_IV 1 +#define SA_HEADER_PROC 1 +#define SA_NO_HEADER_PROC 0 + +union sa_command_0 { + struct { + u32 scatter:1; + u32 gather:1; + u32 save_hash_state:1; + u32 save_iv:1; + u32 load_hash_state:2; + u32 load_iv:2; + u32 digest_len:4; + u32 hdr_proc:1; + u32 extend_pad:1; + u32 stream_cipher_pad:1; + u32 rsv:1; + u32 hash_alg:4; + u32 cipher_alg:4; + u32 pad_type:2; + u32 op_group:2; + u32 dir:1; + u32 opcode:3; + } bf; + u32 w; +} __attribute__((packed)); + +#define CRYPTO_MODE_ECB 0 +#define CRYPTO_MODE_CBC 1 + +#define CRYPTO_FEEDBACK_MODE_NO_FB 0 +#define CRYPTO_FEEDBACK_MODE_64BIT_OFB 0 +#define CRYPTO_FEEDBACK_MODE_8BIT_CFB 1 +#define CRYPTO_FEEDBACK_MODE_1BIT_CFB 2 +#define CRYPTO_FEEDBACK_MODE_128BIT_CFB 3 + +#define SA_AES_KEY_LEN_128 2 +#define SA_AES_KEY_LEN_192 3 +#define SA_AES_KEY_LEN_256 4 + +#define SA_REV2 1 +/** + * The follow defines bits sa_command_1 + * In Basic hash mode this bit define simple hash or hmac. + * In IPsec mode, this bit define muting control. + */ +#define SA_HASH_MODE_HASH 0 +#define SA_HASH_MODE_HMAC 1 +#define SA_MC_ENABLE 0 +#define SA_MC_DISABLE 1 +#define SA_NOT_COPY_HDR 0 +#define SA_COPY_HDR 1 +#define SA_NOT_COPY_PAD 0 +#define SA_COPY_PAD 1 +#define SA_NOT_COPY_PAYLOAD 0 +#define SA_COPY_PAYLOAD 1 +#define SA_EXTENDED_SN_OFF 0 +#define SA_EXTENDED_SN_ON 1 +#define SA_SEQ_MASK_OFF 0 +#define SA_SEQ_MASK_ON 1 + +union sa_command_1 { + struct { + u32 crypto_mode31:1; + u32 save_arc4_state:1; + u32 arc4_stateful:1; + u32 key_len:5; + u32 hash_crypto_offset:8; + u32 sa_rev:2; + u32 byte_offset:1; + u32 hmac_muting:1; + u32 feedback_mode:2; + u32 crypto_mode9_8:2; + u32 extended_seq_num:1; + u32 seq_num_mask:1; + u32 mutable_bit_proc:1; + u32 ip_version:1; + u32 copy_pad:1; + u32 copy_payload:1; + u32 copy_hdr:1; + u32 rsv1:1; + } bf; + u32 w; +} __attribute__((packed)); + +struct dynamic_sa_ctl { + u32 sa_contents; + union sa_command_0 sa_command_0; + union sa_command_1 sa_command_1; +} __attribute__((packed)); + +/** + * State Record for Security Association (SA) + */ +struct sa_state_record { + u32 save_iv[4]; + u32 save_hash_byte_cnt[2]; + u32 save_digest[16]; +} __attribute__((packed)); + +/** + * Security Association (SA) for AES128 + * + */ +struct dynamic_sa_aes128 { + struct dynamic_sa_ctl ctrl; + u32 key[4]; + u32 iv[4]; /* for CBC, OFC, and CFB mode */ + u32 state_ptr; + u32 reserved; +} __attribute__((packed)); + +#define SA_AES128_LEN (sizeof(struct dynamic_sa_aes128)/4) +#define SA_AES128_CONTENTS 0x3e000042 + +/* + * Security Association (SA) for AES192 + */ +struct dynamic_sa_aes192 { + struct dynamic_sa_ctl ctrl; + u32 key[6]; + u32 iv[4]; /* for CBC, OFC, and CFB mode */ + u32 state_ptr; + u32 reserved; +} __attribute__((packed)); + +#define SA_AES192_LEN (sizeof(struct dynamic_sa_aes192)/4) +#define SA_AES192_CONTENTS 0x3e000062 + +/** + * Security Association (SA) for AES256 + */ +struct dynamic_sa_aes256 { + struct dynamic_sa_ctl ctrl; + u32 key[8]; + u32 iv[4]; /* for CBC, OFC, and CFB mode */ + u32 state_ptr; + u32 reserved; +} __attribute__((packed)); + +#define SA_AES256_LEN (sizeof(struct dynamic_sa_aes256)/4) +#define SA_AES256_CONTENTS 0x3e000082 +#define SA_AES_CONTENTS 0x3e000002 + +/** + * Security Association (SA) for HASH160: HMAC-SHA1 + */ +struct dynamic_sa_hash160 { + struct dynamic_sa_ctl ctrl; + u32 inner_digest[5]; + u32 outer_digest[5]; + u32 state_ptr; + u32 reserved; +} __attribute__((packed)); +#define SA_HASH160_LEN (sizeof(struct dynamic_sa_hash160)/4) +#define SA_HASH160_CONTENTS 0x2000a502 + +#endif diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig index 5ea3bfad172a..640c99207242 100644 --- a/drivers/ide/Kconfig +++ b/drivers/ide/Kconfig @@ -56,8 +56,12 @@ if IDE comment "Please see Documentation/ide/ide.txt for help/info on IDE drives" +config IDE_XFER_MODE + bool + config IDE_TIMINGS bool + select IDE_XFER_MODE config IDE_ATAPI bool @@ -698,6 +702,7 @@ config BLK_DEV_IDE_PMAC_ATA100FIRST config BLK_DEV_IDE_AU1XXX bool "IDE for AMD Alchemy Au1200" depends on SOC_AU1200 + select IDE_XFER_MODE choice prompt "IDE Mode for AMD Alchemy Au1200" default CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA @@ -871,6 +876,7 @@ config BLK_DEV_ALI14XX config BLK_DEV_DTC2278 tristate "DTC-2278 support" + select IDE_XFER_MODE select IDE_LEGACY help This driver is enabled at runtime using the "dtc2278.probe" kernel @@ -902,6 +908,7 @@ config BLK_DEV_QD65XX config BLK_DEV_UMC8672 tristate "UMC-8672 support" + select IDE_XFER_MODE select IDE_LEGACY help This driver is enabled at runtime using the "umc8672.probe" kernel @@ -915,5 +922,6 @@ endif config BLK_DEV_IDEDMA def_bool BLK_DEV_IDEDMA_SFF || \ BLK_DEV_IDEDMA_ICS || BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA + select IDE_XFER_MODE endif # IDE diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile index 1c326d94aa6d..9b4bbe1cdc1a 100644 --- a/drivers/ide/Makefile +++ b/drivers/ide/Makefile @@ -5,9 +5,11 @@ EXTRA_CFLAGS += -Idrivers/ide ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \ - ide-taskfile.o ide-pm.o ide-park.o ide-pio-blacklist.o ide-sysfs.o + ide-taskfile.o ide-pm.o ide-park.o ide-sysfs.o ide-devsets.o \ + ide-io-std.o ide-eh.o # core IDE code +ide-core-$(CONFIG_IDE_XFER_MODE) += ide-pio-blacklist.o ide-xfer-mode.o ide-core-$(CONFIG_IDE_TIMINGS) += ide-timings.o ide-core-$(CONFIG_IDE_ATAPI) += ide-atapi.o ide-core-$(CONFIG_BLK_DEV_IDEPCI) += setup-pci.o diff --git a/drivers/ide/aec62xx.c b/drivers/ide/aec62xx.c index 4485b9c6f0e6..878f8ec6dbe1 100644 --- a/drivers/ide/aec62xx.c +++ b/drivers/ide/aec62xx.c @@ -139,7 +139,7 @@ static void aec_set_pio_mode(ide_drive_t *drive, const u8 pio) drive->hwif->port_ops->set_dma_mode(drive, pio + XFER_PIO_0); } -static unsigned int init_chipset_aec62xx(struct pci_dev *dev) +static int init_chipset_aec62xx(struct pci_dev *dev) { /* These are necessary to get AEC6280 Macintosh cards to work */ if ((dev->device == PCI_DEVICE_ID_ARTOP_ATP865) || @@ -156,7 +156,7 @@ static unsigned int init_chipset_aec62xx(struct pci_dev *dev) pci_write_config_byte(dev, 0x4a, reg4ah | 0x80); } - return dev->irq; + return 0; } static u8 atp86x_cable_detect(ide_hwif_t *hwif) diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c index 66f43083408b..d3513b6b8530 100644 --- a/drivers/ide/alim15x3.c +++ b/drivers/ide/alim15x3.c @@ -212,7 +212,7 @@ static int ali15x3_dma_setup(ide_drive_t *drive) * appropriate also sets up the 1533 southbridge. */ -static unsigned int init_chipset_ali15x3(struct pci_dev *dev) +static int init_chipset_ali15x3(struct pci_dev *dev) { unsigned long flags; u8 tmpbyte; diff --git a/drivers/ide/amd74xx.c b/drivers/ide/amd74xx.c index 77267c859965..628cd2e5fed8 100644 --- a/drivers/ide/amd74xx.c +++ b/drivers/ide/amd74xx.c @@ -140,7 +140,7 @@ static void amd7411_cable_detect(struct pci_dev *dev) * The initialization callback. Initialize drive independent registers. */ -static unsigned int init_chipset_amd74xx(struct pci_dev *dev) +static int init_chipset_amd74xx(struct pci_dev *dev) { u8 t = 0, offset = amd_offset(dev); @@ -172,7 +172,7 @@ static unsigned int init_chipset_amd74xx(struct pci_dev *dev) t |= 0xf0; pci_write_config_byte(dev, AMD_IDE_CONFIG + offset, t); - return dev->irq; + return 0; } static u8 amd_cable_detect(ide_hwif_t *hwif) @@ -183,14 +183,6 @@ static u8 amd_cable_detect(ide_hwif_t *hwif) return ATA_CBL_PATA40; } -static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif) -{ - struct pci_dev *dev = to_pci_dev(hwif->dev); - - if (hwif->irq == 0) /* 0 is bogus but will do for now */ - hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel); -} - static const struct ide_port_ops amd_port_ops = { .set_pio_mode = amd_set_pio_mode, .set_dma_mode = amd_set_drive, @@ -207,7 +199,6 @@ static const struct ide_port_ops amd_port_ops = { { \ .name = DRV_NAME, \ .init_chipset = init_chipset_amd74xx, \ - .init_hwif = init_hwif_amd74xx, \ .enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}}, \ .port_ops = &amd_port_ops, \ .host_flags = IDE_HFLAGS_AMD, \ @@ -221,7 +212,6 @@ static const struct ide_port_ops amd_port_ops = { { \ .name = DRV_NAME, \ .init_chipset = init_chipset_amd74xx, \ - .init_hwif = init_hwif_amd74xx, \ .enablebits = {{0x50,0x02,0x02}, {0x50,0x01,0x01}}, \ .port_ops = &amd_port_ops, \ .host_flags = IDE_HFLAGS_AMD, \ diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c index ecd1e62ca91a..923cbfe259d3 100644 --- a/drivers/ide/atiixp.c +++ b/drivers/ide/atiixp.c @@ -142,7 +142,6 @@ static const struct ide_port_info atiixp_pci_info[] __devinitdata = { .name = DRV_NAME, .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}}, .port_ops = &atiixp_port_ops, - .host_flags = IDE_HFLAG_LEGACY_IRQS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, @@ -151,7 +150,7 @@ static const struct ide_port_info atiixp_pci_info[] __devinitdata = { .name = DRV_NAME, .enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}}, .port_ops = &atiixp_port_ops, - .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_LEGACY_IRQS, + .host_flags = IDE_HFLAG_SINGLE, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c index 2f9688d87ecd..aeee036b1503 100644 --- a/drivers/ide/cmd64x.c +++ b/drivers/ide/cmd64x.c @@ -333,7 +333,7 @@ static int cmd646_1_dma_end(ide_drive_t *drive) return (dma_stat & 7) != 4; } -static unsigned int init_chipset_cmd64x(struct pci_dev *dev) +static int init_chipset_cmd64x(struct pci_dev *dev) { u8 mrdmode = 0; diff --git a/drivers/ide/cs5520.c b/drivers/ide/cs5520.c index d003bec56ff9..58fb90e5b763 100644 --- a/drivers/ide/cs5520.c +++ b/drivers/ide/cs5520.c @@ -133,7 +133,8 @@ static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_devic * do all the device setup for us */ - ide_pci_setup_ports(dev, d, 14, &hw[0], &hws[0]); + ide_pci_setup_ports(dev, d, &hw[0], &hws[0]); + hw[0].irq = 14; return ide_host_add(d, hws, NULL); } diff --git a/drivers/ide/cs5530.c b/drivers/ide/cs5530.c index d8ede85fe17f..8e8b35a89901 100644 --- a/drivers/ide/cs5530.c +++ b/drivers/ide/cs5530.c @@ -135,7 +135,7 @@ static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode) * Initialize the cs5530 bridge for reliable IDE DMA operation. */ -static unsigned int init_chipset_cs5530(struct pci_dev *dev) +static int init_chipset_cs5530(struct pci_dev *dev) { struct pci_dev *master_0 = NULL, *cs5530_0 = NULL; diff --git a/drivers/ide/delkin_cb.c b/drivers/ide/delkin_cb.c index 8f1b2d9f0513..bacb1194c9c9 100644 --- a/drivers/ide/delkin_cb.c +++ b/drivers/ide/delkin_cb.c @@ -46,7 +46,7 @@ static const struct ide_port_ops delkin_cb_port_ops = { .quirkproc = ide_undecoded_slave, }; -static unsigned int delkin_cb_init_chipset(struct pci_dev *dev) +static int delkin_cb_init_chipset(struct pci_dev *dev) { unsigned long base = pci_resource_start(dev, 0); int i; diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c index 3eb9b5c63a0f..d3b3e824f445 100644 --- a/drivers/ide/hpt366.c +++ b/drivers/ide/hpt366.c @@ -995,7 +995,7 @@ static void hpt3xx_disable_fast_irq(struct pci_dev *dev, u8 mcr_addr) pci_write_config_byte(dev, mcr_addr + 1, new_mcr); } -static unsigned int init_chipset_hpt366(struct pci_dev *dev) +static int init_chipset_hpt366(struct pci_dev *dev) { unsigned long io_base = pci_resource_start(dev, 4); struct hpt_info *info = hpt3xx_get_info(&dev->dev); @@ -1237,7 +1237,7 @@ static unsigned int init_chipset_hpt366(struct pci_dev *dev) hpt3xx_disable_fast_irq(dev, 0x50); hpt3xx_disable_fast_irq(dev, 0x54); - return dev->irq; + return 0; } static u8 hpt3xx_cable_detect(ide_hwif_t *hwif) diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c index ec7d07fa570a..5b704f1ea90c 100644 --- a/drivers/ide/ide-acpi.c +++ b/drivers/ide/ide-acpi.c @@ -20,9 +20,6 @@ #include <acpi/acpi_bus.h> #define REGS_PER_GTF 7 -struct taskfile_array { - u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ -}; struct GTM_buffer { u32 PIO_speed0; @@ -89,12 +86,8 @@ static const struct dmi_system_id ide_acpi_dmi_table[] = { { } /* terminate list */ }; -static int ide_acpi_blacklist(void) +int ide_acpi_init(void) { - static int done; - if (done) - return 0; - done = 1; dmi_check_system(ide_acpi_dmi_table); return 0; } @@ -202,40 +195,6 @@ static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) } /** - * ide_acpi_drive_get_handle - Get ACPI object handle for a given drive - * @drive: device to locate - * - * Retrieves the object handle of a given drive. According to the ACPI - * spec the drive is a child of the hwif. - * - * Returns handle on success, 0 on error. - */ -static acpi_handle ide_acpi_drive_get_handle(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - int port; - acpi_handle drive_handle; - - if (!hwif->acpidata) - return NULL; - - if (!hwif->acpidata->obj_handle) - return NULL; - - port = hwif->channel ? drive->dn - 2: drive->dn; - - DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", - drive->name, hwif->channel, port); - - - /* TBD: could also check ACPI object VALID bits */ - drive_handle = acpi_get_child(hwif->acpidata->obj_handle, port); - DEBPRINT("drive %s handle 0x%p\n", drive->name, drive_handle); - - return drive_handle; -} - -/** * do_drive_get_GTF - get the drive bootup default taskfile settings * @drive: the drive for which the taskfile settings should be retrieved * @gtf_length: number of bytes of _GTF data returned at @gtf_address @@ -257,47 +216,15 @@ static int do_drive_get_GTF(ide_drive_t *drive, acpi_status status; struct acpi_buffer output; union acpi_object *out_obj; - ide_hwif_t *hwif = drive->hwif; - struct device *dev = hwif->gendev.parent; int err = -ENODEV; - int port; *gtf_length = 0; *gtf_address = 0UL; *obj_loc = 0UL; - if (ide_noacpi) - return 0; - - if (!dev) { - DEBPRINT("no PCI device for %s\n", hwif->name); - goto out; - } - - if (!hwif->acpidata) { - DEBPRINT("no ACPI data for %s\n", hwif->name); - goto out; - } - - port = hwif->channel ? drive->dn - 2: drive->dn; - - DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n", - hwif->name, dev_name(dev), port, hwif->channel); - - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) { - DEBPRINT("%s drive %d:%d not present\n", - hwif->name, hwif->channel, port); - goto out; - } - - /* Get this drive's _ADR info. if not already known. */ if (!drive->acpidata->obj_handle) { - drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); - if (!drive->acpidata->obj_handle) { - DEBPRINT("No ACPI object found for %s\n", - drive->name); - goto out; - } + DEBPRINT("No ACPI object found for %s\n", drive->name); + goto out; } /* Setting up output buffer */ @@ -355,43 +282,6 @@ out: } /** - * taskfile_load_raw - send taskfile registers to drive - * @drive: drive to which output is sent - * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) - * - * Outputs IDE taskfile to the drive. - */ -static int taskfile_load_raw(ide_drive_t *drive, - const struct taskfile_array *gtf) -{ - ide_task_t args; - int err = 0; - - DEBPRINT("(0x1f1-1f7): hex: " - "%02x %02x %02x %02x %02x %02x %02x\n", - gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], - gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); - - memset(&args, 0, sizeof(ide_task_t)); - - /* convert gtf to IDE Taskfile */ - memcpy(&args.tf_array[7], >f->tfa, 7); - args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; - - if (!ide_acpigtf) { - DEBPRINT("_GTF execution disabled\n"); - return err; - } - - err = ide_no_data_taskfile(drive, &args); - if (err) - printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", - __func__, err); - - return err; -} - -/** * do_drive_set_taskfiles - write the drive taskfile settings from _GTF * @drive: the drive to which the taskfile command should be sent * @gtf_length: total number of bytes of _GTF taskfiles @@ -404,43 +294,41 @@ static int do_drive_set_taskfiles(ide_drive_t *drive, unsigned int gtf_length, unsigned long gtf_address) { - int rc = -ENODEV, err; + int rc = 0, err; int gtf_count = gtf_length / REGS_PER_GTF; int ix; - struct taskfile_array *gtf; - - if (ide_noacpi) - return 0; - - DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn); - - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) - goto out; - - if (!gtf_count) /* shouldn't be here */ - goto out; DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", gtf_length, gtf_length, gtf_count, gtf_address); - if (gtf_length % REGS_PER_GTF) { - printk(KERN_ERR "%s: unexpected GTF length (%d)\n", - __func__, gtf_length); - goto out; - } - - rc = 0; + /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */ for (ix = 0; ix < gtf_count; ix++) { - gtf = (struct taskfile_array *) - (gtf_address + ix * REGS_PER_GTF); + u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF); + ide_task_t task; - /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ - err = taskfile_load_raw(drive, gtf); - if (err) + DEBPRINT("(0x1f1-1f7): " + "hex: %02x %02x %02x %02x %02x %02x %02x\n", + gtf[0], gtf[1], gtf[2], + gtf[3], gtf[4], gtf[5], gtf[6]); + + if (!ide_acpigtf) { + DEBPRINT("_GTF execution disabled\n"); + continue; + } + + /* convert GTF to taskfile */ + memset(&task, 0, sizeof(ide_task_t)); + memcpy(&task.tf_array[7], gtf, REGS_PER_GTF); + task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; + + err = ide_no_data_taskfile(drive, &task); + if (err) { + printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", + __func__, err); rc = err; + } } -out: return rc; } @@ -647,26 +535,23 @@ void ide_acpi_set_state(ide_hwif_t *hwif, int on) DEBPRINT("no ACPI data for %s\n", hwif->name); return; } + /* channel first and then drives for power on and verse versa for power off */ if (on) acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); - ide_port_for_each_dev(i, drive, hwif) { - if (!drive->acpidata->obj_handle) - drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); - - if (drive->acpidata->obj_handle && - (drive->dev_flags & IDE_DFLAG_PRESENT)) { + ide_port_for_each_present_dev(i, drive, hwif) { + if (drive->acpidata->obj_handle) acpi_bus_set_power(drive->acpidata->obj_handle, - on? ACPI_STATE_D0: ACPI_STATE_D3); - } + on ? ACPI_STATE_D0 : ACPI_STATE_D3); } + if (!on) acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); } /** - * ide_acpi_init - initialize the ACPI link for an IDE interface + * ide_acpi_init_port - initialize the ACPI link for an IDE interface * @hwif: target IDE interface (channel) * * The ACPI spec is not quite clear when the drive identify buffer @@ -676,10 +561,8 @@ void ide_acpi_set_state(ide_hwif_t *hwif, int on) * So we get the information during startup; but this means that * any changes during run-time will be lost after resume. */ -void ide_acpi_init(ide_hwif_t *hwif) +void ide_acpi_init_port(ide_hwif_t *hwif) { - ide_acpi_blacklist(); - hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); if (!hwif->acpidata) return; @@ -708,15 +591,24 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif) hwif->devices[0]->acpidata = &hwif->acpidata->master; hwif->devices[1]->acpidata = &hwif->acpidata->slave; - /* - * Send IDENTIFY for each drive - */ - ide_port_for_each_dev(i, drive, hwif) { - memset(drive->acpidata, 0, sizeof(*drive->acpidata)); + /* get _ADR info for each device */ + ide_port_for_each_present_dev(i, drive, hwif) { + acpi_handle dev_handle; - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) - continue; + DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", + drive->name, hwif->channel, drive->dn & 1); + + /* TBD: could also check ACPI object VALID bits */ + dev_handle = acpi_get_child(hwif->acpidata->obj_handle, + drive->dn & 1); + + DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); + + drive->acpidata->obj_handle = dev_handle; + } + /* send IDENTIFY for each device */ + ide_port_for_each_present_dev(i, drive, hwif) { err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); if (err) DEBPRINT("identify device %s failed (%d)\n", @@ -736,9 +628,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif) ide_acpi_get_timing(hwif); ide_acpi_push_timing(hwif); - ide_port_for_each_dev(i, drive, hwif) { - if (drive->dev_flags & IDE_DFLAG_PRESENT) - /* Execute ACPI startup code */ - ide_acpi_exec_tfs(drive); + ide_port_for_each_present_dev(i, drive, hwif) { + ide_acpi_exec_tfs(drive); } } diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index e9d042dba0e0..6adc5b4a4406 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -149,7 +149,10 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk, memcpy(rq->cmd, pc->c, 12); if (drive->media == ide_tape) rq->cmd[13] = REQ_IDETAPE_PC1; - ide_do_drive_cmd(drive, rq); + + drive->hwif->rq = NULL; + + elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); } /* @@ -297,6 +300,21 @@ int ide_cd_get_xferlen(struct request *rq) } EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); +void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) +{ + ide_task_t task; + + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | + IDE_TFLAG_IN_NSECT; + + drive->hwif->tp_ops->tf_read(drive, &task); + + *bcount = (task.tf.lbah << 8) | task.tf.lbam; + *ireason = task.tf.nsect & 3; +} +EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); + /* * This is the usual interrupt handler which will be called during a packet * command. We will transfer some of the data (as requested by the drive) @@ -456,6 +474,25 @@ next_irq: return ide_started; } +static void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount) +{ + ide_hwif_t *hwif = drive->hwif; + ide_task_t task; + u8 dma = drive->dma; + + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM | + IDE_TFLAG_OUT_FEATURE | tf_flags; + task.tf.feature = dma; /* Use PIO/DMA */ + task.tf.lbam = bcount & 0xff; + task.tf.lbah = (bcount >> 8) & 0xff; + + ide_tf_dump(drive->name, &task.tf); + hwif->tp_ops->set_irq(hwif, 1); + SELECT_MASK(drive, 0); + hwif->tp_ops->tf_load(drive, &task); +} + static u8 ide_read_ireason(ide_drive_t *drive) { ide_task_t task; @@ -629,7 +666,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive) : WAIT_TAPE_CMD; } - ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma); + ide_pktcmd_tf_load(drive, tf_flags, bcount); /* Issue the packet command */ if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index ddfbea41d296..2177cd11664c 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -242,7 +242,9 @@ static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n", failed_command->cmd[0]); - ide_do_drive_cmd(drive, rq); + drive->hwif->rq = NULL; + + elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); } static void cdrom_end_request(ide_drive_t *drive, int uptodate) diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c new file mode 100644 index 000000000000..7c3953414d47 --- /dev/null +++ b/drivers/ide/ide-devsets.c @@ -0,0 +1,190 @@ + +#include <linux/kernel.h> +#include <linux/ide.h> + +DEFINE_MUTEX(ide_setting_mtx); + +ide_devset_get(io_32bit, io_32bit); + +static int set_io_32bit(ide_drive_t *drive, int arg) +{ + if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) + return -EPERM; + + if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) + return -EINVAL; + + drive->io_32bit = arg; + + return 0; +} + +ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS); + +static int set_ksettings(ide_drive_t *drive, int arg) +{ + if (arg < 0 || arg > 1) + return -EINVAL; + + if (arg) + drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS; + else + drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS; + + return 0; +} + +ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA); + +static int set_using_dma(ide_drive_t *drive, int arg) +{ +#ifdef CONFIG_BLK_DEV_IDEDMA + int err = -EPERM; + + if (arg < 0 || arg > 1) + return -EINVAL; + + if (ata_id_has_dma(drive->id) == 0) + goto out; + + if (drive->hwif->dma_ops == NULL) + goto out; + + err = 0; + + if (arg) { + if (ide_set_dma(drive)) + err = -EIO; + } else + ide_dma_off(drive); + +out: + return err; +#else + if (arg < 0 || arg > 1) + return -EINVAL; + + return -EPERM; +#endif +} + +/* + * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away + */ +static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) +{ + switch (req_pio) { + case 202: + case 201: + case 200: + case 102: + case 101: + case 100: + return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; + case 9: + case 8: + return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; + case 7: + case 6: + return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; + default: + return 0; + } +} + +static int set_pio_mode(ide_drive_t *drive, int arg) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + + if (arg < 0 || arg > 255) + return -EINVAL; + + if (port_ops == NULL || port_ops->set_pio_mode == NULL || + (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) + return -ENOSYS; + + if (set_pio_mode_abuse(drive->hwif, arg)) { + if (arg == 8 || arg == 9) { + unsigned long flags; + + /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ + spin_lock_irqsave(&hwif->lock, flags); + port_ops->set_pio_mode(drive, arg); + spin_unlock_irqrestore(&hwif->lock, flags); + } else + port_ops->set_pio_mode(drive, arg); + } else { + int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); + + ide_set_pio(drive, arg); + + if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) { + if (keep_dma) + ide_dma_on(drive); + } + } + + return 0; +} + +ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK); + +static int set_unmaskirq(ide_drive_t *drive, int arg) +{ + if (drive->dev_flags & IDE_DFLAG_NO_UNMASK) + return -EPERM; + + if (arg < 0 || arg > 1) + return -EINVAL; + + if (arg) + drive->dev_flags |= IDE_DFLAG_UNMASK; + else + drive->dev_flags &= ~IDE_DFLAG_UNMASK; + + return 0; +} + +ide_ext_devset_rw_sync(io_32bit, io_32bit); +ide_ext_devset_rw_sync(keepsettings, ksettings); +ide_ext_devset_rw_sync(unmaskirq, unmaskirq); +ide_ext_devset_rw_sync(using_dma, using_dma); +__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode); + +int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting, + int arg) +{ + struct request_queue *q = drive->queue; + struct request *rq; + int ret = 0; + + if (!(setting->flags & DS_SYNC)) + return setting->set(drive, arg); + + rq = blk_get_request(q, READ, __GFP_WAIT); + rq->cmd_type = REQ_TYPE_SPECIAL; + rq->cmd_len = 5; + rq->cmd[0] = REQ_DEVSET_EXEC; + *(int *)&rq->cmd[1] = arg; + rq->special = setting->set; + + if (blk_execute_rq(q, NULL, rq, 0)) + ret = rq->errors; + blk_put_request(rq); + + return ret; +} + +ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq) +{ + int err, (*setfunc)(ide_drive_t *, int) = rq->special; + + err = setfunc(drive, *(int *)&rq->cmd[1]); + if (err) + rq->errors = err; + else + err = 1; + ide_end_request(drive, err, 0); + return ide_stopped; +} diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 059c90bb5ad2..a878f4734f81 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -470,6 +470,63 @@ void ide_dma_timeout(ide_drive_t *drive) } EXPORT_SYMBOL_GPL(ide_dma_timeout); +/* + * un-busy the port etc, and clear any pending DMA status. we want to + * retry the current request in pio mode instead of risking tossing it + * all away + */ +ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) +{ + ide_hwif_t *hwif = drive->hwif; + struct request *rq; + ide_startstop_t ret = ide_stopped; + + /* + * end current dma transaction + */ + + if (error < 0) { + printk(KERN_WARNING "%s: DMA timeout error\n", drive->name); + (void)hwif->dma_ops->dma_end(drive); + ret = ide_error(drive, "dma timeout error", + hwif->tp_ops->read_status(hwif)); + } else { + printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name); + hwif->dma_ops->dma_timeout(drive); + } + + /* + * disable dma for now, but remember that we did so because of + * a timeout -- we'll reenable after we finish this next request + * (or rather the first chunk of it) in pio. + */ + drive->dev_flags |= IDE_DFLAG_DMA_PIO_RETRY; + drive->retry_pio++; + ide_dma_off_quietly(drive); + + /* + * un-busy drive etc and make sure request is sane + */ + + rq = hwif->rq; + if (!rq) + goto out; + + hwif->rq = NULL; + + rq->errors = 0; + + if (!rq->bio) + goto out; + + rq->sector = rq->bio->bi_sector; + rq->current_nr_sectors = bio_iovec(rq->bio)->bv_len >> 9; + rq->hard_cur_sectors = rq->current_nr_sectors; + rq->buffer = bio_data(rq->bio); +out: + return ret; +} + void ide_release_dma_engine(ide_hwif_t *hwif) { if (hwif->dmatable_cpu) { diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c new file mode 100644 index 000000000000..1231b5e486f2 --- /dev/null +++ b/drivers/ide/ide-eh.c @@ -0,0 +1,428 @@ + +#include <linux/kernel.h> +#include <linux/ide.h> +#include <linux/delay.h> + +static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, + u8 stat, u8 err) +{ + ide_hwif_t *hwif = drive->hwif; + + if ((stat & ATA_BUSY) || + ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { + /* other bits are useless when BUSY */ + rq->errors |= ERROR_RESET; + } else if (stat & ATA_ERR) { + /* err has different meaning on cdrom and tape */ + if (err == ATA_ABORTED) { + if ((drive->dev_flags & IDE_DFLAG_LBA) && + /* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */ + hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS) + return ide_stopped; + } else if ((err & BAD_CRC) == BAD_CRC) { + /* UDMA crc error, just retry the operation */ + drive->crc_count++; + } else if (err & (ATA_BBK | ATA_UNC)) { + /* retries won't help these */ + rq->errors = ERROR_MAX; + } else if (err & ATA_TRK0NF) { + /* help it find track zero */ + rq->errors |= ERROR_RECAL; + } + } + + if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ && + (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) { + int nsect = drive->mult_count ? drive->mult_count : 1; + + ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE); + } + + if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) { + ide_kill_rq(drive, rq); + return ide_stopped; + } + + if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) + rq->errors |= ERROR_RESET; + + if ((rq->errors & ERROR_RESET) == ERROR_RESET) { + ++rq->errors; + return ide_do_reset(drive); + } + + if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) + drive->special.b.recalibrate = 1; + + ++rq->errors; + + return ide_stopped; +} + +static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, + u8 stat, u8 err) +{ + ide_hwif_t *hwif = drive->hwif; + + if ((stat & ATA_BUSY) || + ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { + /* other bits are useless when BUSY */ + rq->errors |= ERROR_RESET; + } else { + /* add decoding error stuff */ + } + + if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) + /* force an abort */ + hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); + + if (rq->errors >= ERROR_MAX) { + ide_kill_rq(drive, rq); + } else { + if ((rq->errors & ERROR_RESET) == ERROR_RESET) { + ++rq->errors; + return ide_do_reset(drive); + } + ++rq->errors; + } + + return ide_stopped; +} + +static ide_startstop_t __ide_error(ide_drive_t *drive, struct request *rq, + u8 stat, u8 err) +{ + if (drive->media == ide_disk) + return ide_ata_error(drive, rq, stat, err); + return ide_atapi_error(drive, rq, stat, err); +} + +/** + * ide_error - handle an error on the IDE + * @drive: drive the error occurred on + * @msg: message to report + * @stat: status bits + * + * ide_error() takes action based on the error returned by the drive. + * For normal I/O that may well include retries. We deal with + * both new-style (taskfile) and old style command handling here. + * In the case of taskfile command handling there is work left to + * do + */ + +ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat) +{ + struct request *rq; + u8 err; + + err = ide_dump_status(drive, msg, stat); + + rq = drive->hwif->rq; + if (rq == NULL) + return ide_stopped; + + /* retry only "normal" I/O: */ + if (!blk_fs_request(rq)) { + rq->errors = 1; + ide_end_drive_cmd(drive, stat, err); + return ide_stopped; + } + + return __ide_error(drive, rq, stat, err); +} +EXPORT_SYMBOL_GPL(ide_error); + +static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) +{ + struct request *rq = drive->hwif->rq; + + if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) + ide_end_request(drive, err ? err : 1, 0); +} + +/* needed below */ +static ide_startstop_t do_reset1(ide_drive_t *, int); + +/* + * atapi_reset_pollfunc() gets invoked to poll the interface for completion + * every 50ms during an atapi drive reset operation. If the drive has not yet + * responded, and we have not yet hit our maximum waiting time, then the timer + * is restarted for another 50ms. + */ +static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + u8 stat; + + SELECT_DRIVE(drive); + udelay(10); + stat = hwif->tp_ops->read_status(hwif); + + if (OK_STAT(stat, 0, ATA_BUSY)) + printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name); + else { + if (time_before(jiffies, hwif->poll_timeout)) { + ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, + NULL); + /* continue polling */ + return ide_started; + } + /* end of polling */ + hwif->polling = 0; + printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n", + drive->name, stat); + /* do it the old fashioned way */ + return do_reset1(drive, 1); + } + /* done polling */ + hwif->polling = 0; + ide_complete_drive_reset(drive, 0); + return ide_stopped; +} + +static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) +{ + static const char *err_master_vals[] = + { NULL, "passed", "formatter device error", + "sector buffer error", "ECC circuitry error", + "controlling MPU error" }; + + u8 err_master = err & 0x7f; + + printk(KERN_ERR "%s: reset: master: ", hwif->name); + if (err_master && err_master < 6) + printk(KERN_CONT "%s", err_master_vals[err_master]); + else + printk(KERN_CONT "error (0x%02x?)", err); + if (err & 0x80) + printk(KERN_CONT "; slave: failed"); + printk(KERN_CONT "\n"); +} + +/* + * reset_pollfunc() gets invoked to poll the interface for completion every 50ms + * during an ide reset operation. If the drives have not yet responded, + * and we have not yet hit our maximum waiting time, then the timer is restarted + * for another 50ms. + */ +static ide_startstop_t reset_pollfunc(ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + u8 tmp; + int err = 0; + + if (port_ops && port_ops->reset_poll) { + err = port_ops->reset_poll(drive); + if (err) { + printk(KERN_ERR "%s: host reset_poll failure for %s.\n", + hwif->name, drive->name); + goto out; + } + } + + tmp = hwif->tp_ops->read_status(hwif); + + if (!OK_STAT(tmp, 0, ATA_BUSY)) { + if (time_before(jiffies, hwif->poll_timeout)) { + ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); + /* continue polling */ + return ide_started; + } + printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n", + hwif->name, tmp); + drive->failures++; + err = -EIO; + } else { + tmp = ide_read_error(drive); + + if (tmp == 1) { + printk(KERN_INFO "%s: reset: success\n", hwif->name); + drive->failures = 0; + } else { + ide_reset_report_error(hwif, tmp); + drive->failures++; + err = -EIO; + } + } +out: + hwif->polling = 0; /* done polling */ + ide_complete_drive_reset(drive, err); + return ide_stopped; +} + +static void ide_disk_pre_reset(ide_drive_t *drive) +{ + int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; + + drive->special.all = 0; + drive->special.b.set_geometry = legacy; + drive->special.b.recalibrate = legacy; + + drive->mult_count = 0; + drive->dev_flags &= ~IDE_DFLAG_PARKED; + + if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && + (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) + drive->mult_req = 0; + + if (drive->mult_req != drive->mult_count) + drive->special.b.set_multmode = 1; +} + +static void pre_reset(ide_drive_t *drive) +{ + const struct ide_port_ops *port_ops = drive->hwif->port_ops; + + if (drive->media == ide_disk) + ide_disk_pre_reset(drive); + else + drive->dev_flags |= IDE_DFLAG_POST_RESET; + + if (drive->dev_flags & IDE_DFLAG_USING_DMA) { + if (drive->crc_count) + ide_check_dma_crc(drive); + else + ide_dma_off(drive); + } + + if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { + if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { + drive->dev_flags &= ~IDE_DFLAG_UNMASK; + drive->io_32bit = 0; + } + return; + } + + if (port_ops && port_ops->pre_reset) + port_ops->pre_reset(drive); + + if (drive->current_speed != 0xff) + drive->desired_speed = drive->current_speed; + drive->current_speed = 0xff; +} + +/* + * do_reset1() attempts to recover a confused drive by resetting it. + * Unfortunately, resetting a disk drive actually resets all devices on + * the same interface, so it can really be thought of as resetting the + * interface rather than resetting the drive. + * + * ATAPI devices have their own reset mechanism which allows them to be + * individually reset without clobbering other devices on the same interface. + * + * Unfortunately, the IDE interface does not generate an interrupt to let + * us know when the reset operation has finished, so we must poll for this. + * Equally poor, though, is the fact that this may a very long time to complete, + * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, + * we set a timer to poll at 50ms intervals. + */ +static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi) +{ + ide_hwif_t *hwif = drive->hwif; + struct ide_io_ports *io_ports = &hwif->io_ports; + const struct ide_tp_ops *tp_ops = hwif->tp_ops; + const struct ide_port_ops *port_ops; + ide_drive_t *tdrive; + unsigned long flags, timeout; + int i; + DEFINE_WAIT(wait); + + spin_lock_irqsave(&hwif->lock, flags); + + /* We must not reset with running handlers */ + BUG_ON(hwif->handler != NULL); + + /* For an ATAPI device, first try an ATAPI SRST. */ + if (drive->media != ide_disk && !do_not_try_atapi) { + pre_reset(drive); + SELECT_DRIVE(drive); + udelay(20); + tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); + ndelay(400); + hwif->poll_timeout = jiffies + WAIT_WORSTCASE; + hwif->polling = 1; + __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); + spin_unlock_irqrestore(&hwif->lock, flags); + return ide_started; + } + + /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ + do { + unsigned long now; + + prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); + timeout = jiffies; + ide_port_for_each_present_dev(i, tdrive, hwif) { + if ((tdrive->dev_flags & IDE_DFLAG_PARKED) && + time_after(tdrive->sleep, timeout)) + timeout = tdrive->sleep; + } + + now = jiffies; + if (time_before_eq(timeout, now)) + break; + + spin_unlock_irqrestore(&hwif->lock, flags); + timeout = schedule_timeout_uninterruptible(timeout - now); + spin_lock_irqsave(&hwif->lock, flags); + } while (timeout); + finish_wait(&ide_park_wq, &wait); + + /* + * First, reset any device state data we were maintaining + * for any of the drives on this interface. + */ + ide_port_for_each_dev(i, tdrive, hwif) + pre_reset(tdrive); + + if (io_ports->ctl_addr == 0) { + spin_unlock_irqrestore(&hwif->lock, flags); + ide_complete_drive_reset(drive, -ENXIO); + return ide_stopped; + } + + /* + * Note that we also set nIEN while resetting the device, + * to mask unwanted interrupts from the interface during the reset. + * However, due to the design of PC hardware, this will cause an + * immediate interrupt due to the edge transition it produces. + * This single interrupt gives us a "fast poll" for drives that + * recover from reset very quickly, saving us the first 50ms wait time. + * + * TODO: add ->softreset method and stop abusing ->set_irq + */ + /* set SRST and nIEN */ + tp_ops->set_irq(hwif, 4); + /* more than enough time */ + udelay(10); + /* clear SRST, leave nIEN (unless device is on the quirk list) */ + tp_ops->set_irq(hwif, drive->quirk_list == 2); + /* more than enough time */ + udelay(10); + hwif->poll_timeout = jiffies + WAIT_WORSTCASE; + hwif->polling = 1; + __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); + + /* + * Some weird controller like resetting themselves to a strange + * state when the disks are reset this way. At least, the Winbond + * 553 documentation says that + */ + port_ops = hwif->port_ops; + if (port_ops && port_ops->resetproc) + port_ops->resetproc(drive); + + spin_unlock_irqrestore(&hwif->lock, flags); + return ide_started; +} + +/* + * ide_do_reset() is the entry point to the drive/interface reset code. + */ + +ide_startstop_t ide_do_reset(ide_drive_t *drive) +{ + return do_reset1(drive, 0); +} +EXPORT_SYMBOL(ide_do_reset); diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c new file mode 100644 index 000000000000..45b43dd49cda --- /dev/null +++ b/drivers/ide/ide-io-std.c @@ -0,0 +1,316 @@ + +#include <linux/kernel.h> +#include <linux/ide.h> + +/* + * Conventional PIO operations for ATA devices + */ + +static u8 ide_inb(unsigned long port) +{ + return (u8) inb(port); +} + +static void ide_outb(u8 val, unsigned long port) +{ + outb(val, port); +} + +/* + * MMIO operations, typically used for SATA controllers + */ + +static u8 ide_mm_inb(unsigned long port) +{ + return (u8) readb((void __iomem *) port); +} + +static void ide_mm_outb(u8 value, unsigned long port) +{ + writeb(value, (void __iomem *) port); +} + +void ide_exec_command(ide_hwif_t *hwif, u8 cmd) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); + else + outb(cmd, hwif->io_ports.command_addr); +} +EXPORT_SYMBOL_GPL(ide_exec_command); + +u8 ide_read_status(ide_hwif_t *hwif) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + return readb((void __iomem *)hwif->io_ports.status_addr); + else + return inb(hwif->io_ports.status_addr); +} +EXPORT_SYMBOL_GPL(ide_read_status); + +u8 ide_read_altstatus(ide_hwif_t *hwif) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + return readb((void __iomem *)hwif->io_ports.ctl_addr); + else + return inb(hwif->io_ports.ctl_addr); +} +EXPORT_SYMBOL_GPL(ide_read_altstatus); + +void ide_set_irq(ide_hwif_t *hwif, int on) +{ + u8 ctl = ATA_DEVCTL_OBS; + + if (on == 4) { /* hack for SRST */ + ctl |= 4; + on &= ~4; + } + + ctl |= on ? 0 : 2; + + if (hwif->host_flags & IDE_HFLAG_MMIO) + writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); + else + outb(ctl, hwif->io_ports.ctl_addr); +} +EXPORT_SYMBOL_GPL(ide_set_irq); + +void ide_tf_load(ide_drive_t *drive, ide_task_t *task) +{ + ide_hwif_t *hwif = drive->hwif; + struct ide_io_ports *io_ports = &hwif->io_ports; + struct ide_taskfile *tf = &task->tf; + void (*tf_outb)(u8 addr, unsigned long port); + u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; + u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; + + if (mmio) + tf_outb = ide_mm_outb; + else + tf_outb = ide_outb; + + if (task->tf_flags & IDE_TFLAG_FLAGGED) + HIHI = 0xFF; + + if (task->tf_flags & IDE_TFLAG_OUT_DATA) { + u16 data = (tf->hob_data << 8) | tf->data; + + if (mmio) + writew(data, (void __iomem *)io_ports->data_addr); + else + outw(data, io_ports->data_addr); + } + + if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) + tf_outb(tf->hob_feature, io_ports->feature_addr); + if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) + tf_outb(tf->hob_nsect, io_ports->nsect_addr); + if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) + tf_outb(tf->hob_lbal, io_ports->lbal_addr); + if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) + tf_outb(tf->hob_lbam, io_ports->lbam_addr); + if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) + tf_outb(tf->hob_lbah, io_ports->lbah_addr); + + if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) + tf_outb(tf->feature, io_ports->feature_addr); + if (task->tf_flags & IDE_TFLAG_OUT_NSECT) + tf_outb(tf->nsect, io_ports->nsect_addr); + if (task->tf_flags & IDE_TFLAG_OUT_LBAL) + tf_outb(tf->lbal, io_ports->lbal_addr); + if (task->tf_flags & IDE_TFLAG_OUT_LBAM) + tf_outb(tf->lbam, io_ports->lbam_addr); + if (task->tf_flags & IDE_TFLAG_OUT_LBAH) + tf_outb(tf->lbah, io_ports->lbah_addr); + + if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) + tf_outb((tf->device & HIHI) | drive->select, + io_ports->device_addr); +} +EXPORT_SYMBOL_GPL(ide_tf_load); + +void ide_tf_read(ide_drive_t *drive, ide_task_t *task) +{ + ide_hwif_t *hwif = drive->hwif; + struct ide_io_ports *io_ports = &hwif->io_ports; + struct ide_taskfile *tf = &task->tf; + void (*tf_outb)(u8 addr, unsigned long port); + u8 (*tf_inb)(unsigned long port); + u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; + + if (mmio) { + tf_outb = ide_mm_outb; + tf_inb = ide_mm_inb; + } else { + tf_outb = ide_outb; + tf_inb = ide_inb; + } + + if (task->tf_flags & IDE_TFLAG_IN_DATA) { + u16 data; + + if (mmio) + data = readw((void __iomem *)io_ports->data_addr); + else + data = inw(io_ports->data_addr); + + tf->data = data & 0xff; + tf->hob_data = (data >> 8) & 0xff; + } + + /* be sure we're looking at the low order bits */ + tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); + + if (task->tf_flags & IDE_TFLAG_IN_FEATURE) + tf->feature = tf_inb(io_ports->feature_addr); + if (task->tf_flags & IDE_TFLAG_IN_NSECT) + tf->nsect = tf_inb(io_ports->nsect_addr); + if (task->tf_flags & IDE_TFLAG_IN_LBAL) + tf->lbal = tf_inb(io_ports->lbal_addr); + if (task->tf_flags & IDE_TFLAG_IN_LBAM) + tf->lbam = tf_inb(io_ports->lbam_addr); + if (task->tf_flags & IDE_TFLAG_IN_LBAH) + tf->lbah = tf_inb(io_ports->lbah_addr); + if (task->tf_flags & IDE_TFLAG_IN_DEVICE) + tf->device = tf_inb(io_ports->device_addr); + + if (task->tf_flags & IDE_TFLAG_LBA48) { + tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); + + if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) + tf->hob_feature = tf_inb(io_ports->feature_addr); + if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) + tf->hob_nsect = tf_inb(io_ports->nsect_addr); + if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) + tf->hob_lbal = tf_inb(io_ports->lbal_addr); + if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) + tf->hob_lbam = tf_inb(io_ports->lbam_addr); + if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) + tf->hob_lbah = tf_inb(io_ports->lbah_addr); + } +} +EXPORT_SYMBOL_GPL(ide_tf_read); + +/* + * Some localbus EIDE interfaces require a special access sequence + * when using 32-bit I/O instructions to transfer data. We call this + * the "vlb_sync" sequence, which consists of three successive reads + * of the sector count register location, with interrupts disabled + * to ensure that the reads all happen together. + */ +static void ata_vlb_sync(unsigned long port) +{ + (void)inb(port); + (void)inb(port); + (void)inb(port); +} + +/* + * This is used for most PIO data transfers *from* the IDE interface + * + * These routines will round up any request for an odd number of bytes, + * so if an odd len is specified, be sure that there's at least one + * extra byte allocated for the buffer. + */ +void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, + unsigned int len) +{ + ide_hwif_t *hwif = drive->hwif; + struct ide_io_ports *io_ports = &hwif->io_ports; + unsigned long data_addr = io_ports->data_addr; + u8 io_32bit = drive->io_32bit; + u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; + + len++; + + if (io_32bit) { + unsigned long uninitialized_var(flags); + + if ((io_32bit & 2) && !mmio) { + local_irq_save(flags); + ata_vlb_sync(io_ports->nsect_addr); + } + + if (mmio) + __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); + else + insl(data_addr, buf, len / 4); + + if ((io_32bit & 2) && !mmio) + local_irq_restore(flags); + + if ((len & 3) >= 2) { + if (mmio) + __ide_mm_insw((void __iomem *)data_addr, + (u8 *)buf + (len & ~3), 1); + else + insw(data_addr, (u8 *)buf + (len & ~3), 1); + } + } else { + if (mmio) + __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); + else + insw(data_addr, buf, len / 2); + } +} +EXPORT_SYMBOL_GPL(ide_input_data); + +/* + * This is used for most PIO data transfers *to* the IDE interface + */ +void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, + unsigned int len) +{ + ide_hwif_t *hwif = drive->hwif; + struct ide_io_ports *io_ports = &hwif->io_ports; + unsigned long data_addr = io_ports->data_addr; + u8 io_32bit = drive->io_32bit; + u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; + + len++; + + if (io_32bit) { + unsigned long uninitialized_var(flags); + + if ((io_32bit & 2) && !mmio) { + local_irq_save(flags); + ata_vlb_sync(io_ports->nsect_addr); + } + + if (mmio) + __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); + else + outsl(data_addr, buf, len / 4); + + if ((io_32bit & 2) && !mmio) + local_irq_restore(flags); + + if ((len & 3) >= 2) { + if (mmio) + __ide_mm_outsw((void __iomem *)data_addr, + (u8 *)buf + (len & ~3), 1); + else + outsw(data_addr, (u8 *)buf + (len & ~3), 1); + } + } else { + if (mmio) + __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); + else + outsw(data_addr, buf, len / 2); + } +} +EXPORT_SYMBOL_GPL(ide_output_data); + +const struct ide_tp_ops default_tp_ops = { + .exec_command = ide_exec_command, + .read_status = ide_read_status, + .read_altstatus = ide_read_altstatus, + + .set_irq = ide_set_irq, + + .tf_load = ide_tf_load, + .tf_read = ide_tf_read, + + .input_data = ide_input_data, + .output_data = ide_output_data, +}; diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index a9a6c208288a..2e92497b58aa 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -196,7 +196,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err) } EXPORT_SYMBOL(ide_end_drive_cmd); -static void ide_kill_rq(ide_drive_t *drive, struct request *rq) +void ide_kill_rq(ide_drive_t *drive, struct request *rq) { if (rq->rq_disk) { struct ide_driver *drv; @@ -207,133 +207,6 @@ static void ide_kill_rq(ide_drive_t *drive, struct request *rq) ide_end_request(drive, 0, 0); } -static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) -{ - ide_hwif_t *hwif = drive->hwif; - - if ((stat & ATA_BUSY) || - ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { - /* other bits are useless when BUSY */ - rq->errors |= ERROR_RESET; - } else if (stat & ATA_ERR) { - /* err has different meaning on cdrom and tape */ - if (err == ATA_ABORTED) { - if ((drive->dev_flags & IDE_DFLAG_LBA) && - /* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */ - hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS) - return ide_stopped; - } else if ((err & BAD_CRC) == BAD_CRC) { - /* UDMA crc error, just retry the operation */ - drive->crc_count++; - } else if (err & (ATA_BBK | ATA_UNC)) { - /* retries won't help these */ - rq->errors = ERROR_MAX; - } else if (err & ATA_TRK0NF) { - /* help it find track zero */ - rq->errors |= ERROR_RECAL; - } - } - - if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ && - (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) { - int nsect = drive->mult_count ? drive->mult_count : 1; - - ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE); - } - - if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) { - ide_kill_rq(drive, rq); - return ide_stopped; - } - - if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) - rq->errors |= ERROR_RESET; - - if ((rq->errors & ERROR_RESET) == ERROR_RESET) { - ++rq->errors; - return ide_do_reset(drive); - } - - if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) - drive->special.b.recalibrate = 1; - - ++rq->errors; - - return ide_stopped; -} - -static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) -{ - ide_hwif_t *hwif = drive->hwif; - - if ((stat & ATA_BUSY) || - ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) { - /* other bits are useless when BUSY */ - rq->errors |= ERROR_RESET; - } else { - /* add decoding error stuff */ - } - - if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) - /* force an abort */ - hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); - - if (rq->errors >= ERROR_MAX) { - ide_kill_rq(drive, rq); - } else { - if ((rq->errors & ERROR_RESET) == ERROR_RESET) { - ++rq->errors; - return ide_do_reset(drive); - } - ++rq->errors; - } - - return ide_stopped; -} - -static ide_startstop_t -__ide_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) -{ - if (drive->media == ide_disk) - return ide_ata_error(drive, rq, stat, err); - return ide_atapi_error(drive, rq, stat, err); -} - -/** - * ide_error - handle an error on the IDE - * @drive: drive the error occurred on - * @msg: message to report - * @stat: status bits - * - * ide_error() takes action based on the error returned by the drive. - * For normal I/O that may well include retries. We deal with - * both new-style (taskfile) and old style command handling here. - * In the case of taskfile command handling there is work left to - * do - */ - -ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, u8 stat) -{ - struct request *rq; - u8 err; - - err = ide_dump_status(drive, msg, stat); - - rq = drive->hwif->rq; - if (rq == NULL) - return ide_stopped; - - /* retry only "normal" I/O: */ - if (!blk_fs_request(rq)) { - rq->errors = 1; - ide_end_drive_cmd(drive, stat, err); - return ide_stopped; - } - - return __ide_error(drive, rq, stat, err); -} -EXPORT_SYMBOL_GPL(ide_error); - static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf) { tf->nsect = drive->sect; @@ -490,71 +363,16 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, return ide_stopped; } -int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting, - int arg) -{ - struct request_queue *q = drive->queue; - struct request *rq; - int ret = 0; - - if (!(setting->flags & DS_SYNC)) - return setting->set(drive, arg); - - rq = blk_get_request(q, READ, __GFP_WAIT); - rq->cmd_type = REQ_TYPE_SPECIAL; - rq->cmd_len = 5; - rq->cmd[0] = REQ_DEVSET_EXEC; - *(int *)&rq->cmd[1] = arg; - rq->special = setting->set; - - if (blk_execute_rq(q, NULL, rq, 0)) - ret = rq->errors; - blk_put_request(rq); - - return ret; -} -EXPORT_SYMBOL_GPL(ide_devset_execute); - static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq) { u8 cmd = rq->cmd[0]; - if (cmd == REQ_PARK_HEADS || cmd == REQ_UNPARK_HEADS) { - ide_task_t task; - struct ide_taskfile *tf = &task.tf; - - memset(&task, 0, sizeof(task)); - if (cmd == REQ_PARK_HEADS) { - drive->sleep = *(unsigned long *)rq->special; - drive->dev_flags |= IDE_DFLAG_SLEEPING; - tf->command = ATA_CMD_IDLEIMMEDIATE; - tf->feature = 0x44; - tf->lbal = 0x4c; - tf->lbam = 0x4e; - tf->lbah = 0x55; - task.tf_flags |= IDE_TFLAG_CUSTOM_HANDLER; - } else /* cmd == REQ_UNPARK_HEADS */ - tf->command = ATA_CMD_CHK_POWER; - - task.tf_flags |= IDE_TFLAG_TF | IDE_TFLAG_DEVICE; - task.rq = rq; - drive->hwif->data_phase = task.data_phase = TASKFILE_NO_DATA; - return do_rw_taskfile(drive, &task); - } - switch (cmd) { + case REQ_PARK_HEADS: + case REQ_UNPARK_HEADS: + return ide_do_park_unpark(drive, rq); case REQ_DEVSET_EXEC: - { - int err, (*setfunc)(ide_drive_t *, int) = rq->special; - - err = setfunc(drive, *(int *)&rq->cmd[1]); - if (err) - rq->errors = err; - else - err = 1; - ide_end_request(drive, err, 0); - return ide_stopped; - } + return ide_do_devset(drive, rq); case REQ_DRIVE_RESET: return ide_do_reset(drive); default: @@ -820,63 +638,6 @@ plug_device_2: blk_plug_device(q); } -/* - * un-busy the port etc, and clear any pending DMA status. we want to - * retry the current request in pio mode instead of risking tossing it - * all away - */ -static ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) -{ - ide_hwif_t *hwif = drive->hwif; - struct request *rq; - ide_startstop_t ret = ide_stopped; - - /* - * end current dma transaction - */ - - if (error < 0) { - printk(KERN_WARNING "%s: DMA timeout error\n", drive->name); - (void)hwif->dma_ops->dma_end(drive); - ret = ide_error(drive, "dma timeout error", - hwif->tp_ops->read_status(hwif)); - } else { - printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name); - hwif->dma_ops->dma_timeout(drive); - } - - /* - * disable dma for now, but remember that we did so because of - * a timeout -- we'll reenable after we finish this next request - * (or rather the first chunk of it) in pio. - */ - drive->dev_flags |= IDE_DFLAG_DMA_PIO_RETRY; - drive->retry_pio++; - ide_dma_off_quietly(drive); - - /* - * un-busy drive etc and make sure request is sane - */ - - rq = hwif->rq; - if (!rq) - goto out; - - hwif->rq = NULL; - - rq->errors = 0; - - if (!rq->bio) - goto out; - - rq->sector = rq->bio->bi_sector; - rq->current_nr_sectors = bio_iovec(rq->bio)->bv_len >> 9; - rq->hard_cur_sectors = rq->current_nr_sectors; - rq->buffer = bio_data(rq->bio); -out: - return ret; -} - static void ide_plug_device(ide_drive_t *drive) { struct request_queue *q = drive->queue; @@ -888,6 +649,29 @@ static void ide_plug_device(ide_drive_t *drive) spin_unlock_irqrestore(q->queue_lock, flags); } +static int drive_is_ready(ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + u8 stat = 0; + + if (drive->waiting_for_dma) + return hwif->dma_ops->dma_test_irq(drive); + + if (hwif->io_ports.ctl_addr && + (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) + stat = hwif->tp_ops->read_altstatus(hwif); + else + /* Note: this may clear a pending IRQ!! */ + stat = hwif->tp_ops->read_status(hwif); + + if (stat & ATA_BUSY) + /* drive busy: definitely not interrupting */ + return 0; + + /* drive ready: *might* be interrupting */ + return 1; +} + /** * ide_timer_expiry - handle lack of an IDE interrupt * @data: timer callback magic (hwif) @@ -1164,54 +948,6 @@ out_early: } EXPORT_SYMBOL_GPL(ide_intr); -/** - * ide_do_drive_cmd - issue IDE special command - * @drive: device to issue command - * @rq: request to issue - * - * This function issues a special IDE device request - * onto the request queue. - * - * the rq is queued at the head of the request queue, displacing - * the currently-being-processed request and this function - * returns immediately without waiting for the new rq to be - * completed. This is VERY DANGEROUS, and is intended for - * careful use by the ATAPI tape/cdrom driver code. - */ - -void ide_do_drive_cmd(ide_drive_t *drive, struct request *rq) -{ - struct request_queue *q = drive->queue; - unsigned long flags; - - drive->hwif->rq = NULL; - - spin_lock_irqsave(q->queue_lock, flags); - __elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 0); - spin_unlock_irqrestore(q->queue_lock, flags); -} -EXPORT_SYMBOL(ide_do_drive_cmd); - -void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma) -{ - ide_hwif_t *hwif = drive->hwif; - ide_task_t task; - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM | - IDE_TFLAG_OUT_FEATURE | tf_flags; - task.tf.feature = dma; /* Use PIO/DMA */ - task.tf.lbam = bcount & 0xff; - task.tf.lbah = (bcount >> 8) & 0xff; - - ide_tf_dump(drive->name, &task.tf); - hwif->tp_ops->set_irq(hwif, 1); - SELECT_MASK(drive, 0); - hwif->tp_ops->tf_load(drive, &task); -} - -EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load); - void ide_pad_transfer(ide_drive_t *drive, int write, int len) { ide_hwif_t *hwif = drive->hwif; diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index b1892bd95c6f..317c5dadd7c0 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -27,35 +27,7 @@ #include <asm/uaccess.h> #include <asm/io.h> -/* - * Conventional PIO operations for ATA devices - */ - -static u8 ide_inb (unsigned long port) -{ - return (u8) inb(port); -} - -static void ide_outb (u8 val, unsigned long port) -{ - outb(val, port); -} - -/* - * MMIO operations, typically used for SATA controllers - */ - -static u8 ide_mm_inb (unsigned long port) -{ - return (u8) readb((void __iomem *) port); -} - -static void ide_mm_outb (u8 value, unsigned long port) -{ - writeb(value, (void __iomem *) port); -} - -void SELECT_DRIVE (ide_drive_t *drive) +void SELECT_DRIVE(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; const struct ide_port_ops *port_ops = hwif->port_ops; @@ -78,277 +50,6 @@ void SELECT_MASK(ide_drive_t *drive, int mask) port_ops->maskproc(drive, mask); } -void ide_exec_command(ide_hwif_t *hwif, u8 cmd) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); - else - outb(cmd, hwif->io_ports.command_addr); -} -EXPORT_SYMBOL_GPL(ide_exec_command); - -u8 ide_read_status(ide_hwif_t *hwif) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - return readb((void __iomem *)hwif->io_ports.status_addr); - else - return inb(hwif->io_ports.status_addr); -} -EXPORT_SYMBOL_GPL(ide_read_status); - -u8 ide_read_altstatus(ide_hwif_t *hwif) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - return readb((void __iomem *)hwif->io_ports.ctl_addr); - else - return inb(hwif->io_ports.ctl_addr); -} -EXPORT_SYMBOL_GPL(ide_read_altstatus); - -void ide_set_irq(ide_hwif_t *hwif, int on) -{ - u8 ctl = ATA_DEVCTL_OBS; - - if (on == 4) { /* hack for SRST */ - ctl |= 4; - on &= ~4; - } - - ctl |= on ? 0 : 2; - - if (hwif->host_flags & IDE_HFLAG_MMIO) - writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); - else - outb(ctl, hwif->io_ports.ctl_addr); -} -EXPORT_SYMBOL_GPL(ide_set_irq); - -void ide_tf_load(ide_drive_t *drive, ide_task_t *task) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - struct ide_taskfile *tf = &task->tf; - void (*tf_outb)(u8 addr, unsigned long port); - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; - - if (mmio) - tf_outb = ide_mm_outb; - else - tf_outb = ide_outb; - - if (task->tf_flags & IDE_TFLAG_FLAGGED) - HIHI = 0xFF; - - if (task->tf_flags & IDE_TFLAG_OUT_DATA) { - u16 data = (tf->hob_data << 8) | tf->data; - - if (mmio) - writew(data, (void __iomem *)io_ports->data_addr); - else - outw(data, io_ports->data_addr); - } - - if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) - tf_outb(tf->hob_feature, io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) - tf_outb(tf->hob_nsect, io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) - tf_outb(tf->hob_lbal, io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) - tf_outb(tf->hob_lbam, io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) - tf_outb(tf->hob_lbah, io_ports->lbah_addr); - - if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) - tf_outb(tf->feature, io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_OUT_NSECT) - tf_outb(tf->nsect, io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAL) - tf_outb(tf->lbal, io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAM) - tf_outb(tf->lbam, io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAH) - tf_outb(tf->lbah, io_ports->lbah_addr); - - if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) - tf_outb((tf->device & HIHI) | drive->select, - io_ports->device_addr); -} -EXPORT_SYMBOL_GPL(ide_tf_load); - -void ide_tf_read(ide_drive_t *drive, ide_task_t *task) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - struct ide_taskfile *tf = &task->tf; - void (*tf_outb)(u8 addr, unsigned long port); - u8 (*tf_inb)(unsigned long port); - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - if (mmio) { - tf_outb = ide_mm_outb; - tf_inb = ide_mm_inb; - } else { - tf_outb = ide_outb; - tf_inb = ide_inb; - } - - if (task->tf_flags & IDE_TFLAG_IN_DATA) { - u16 data; - - if (mmio) - data = readw((void __iomem *)io_ports->data_addr); - else - data = inw(io_ports->data_addr); - - tf->data = data & 0xff; - tf->hob_data = (data >> 8) & 0xff; - } - - /* be sure we're looking at the low order bits */ - tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); - - if (task->tf_flags & IDE_TFLAG_IN_FEATURE) - tf->feature = tf_inb(io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_IN_NSECT) - tf->nsect = tf_inb(io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAL) - tf->lbal = tf_inb(io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAM) - tf->lbam = tf_inb(io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAH) - tf->lbah = tf_inb(io_ports->lbah_addr); - if (task->tf_flags & IDE_TFLAG_IN_DEVICE) - tf->device = tf_inb(io_ports->device_addr); - - if (task->tf_flags & IDE_TFLAG_LBA48) { - tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); - - if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) - tf->hob_feature = tf_inb(io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) - tf->hob_nsect = tf_inb(io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) - tf->hob_lbal = tf_inb(io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) - tf->hob_lbam = tf_inb(io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) - tf->hob_lbah = tf_inb(io_ports->lbah_addr); - } -} -EXPORT_SYMBOL_GPL(ide_tf_read); - -/* - * Some localbus EIDE interfaces require a special access sequence - * when using 32-bit I/O instructions to transfer data. We call this - * the "vlb_sync" sequence, which consists of three successive reads - * of the sector count register location, with interrupts disabled - * to ensure that the reads all happen together. - */ -static void ata_vlb_sync(unsigned long port) -{ - (void)inb(port); - (void)inb(port); - (void)inb(port); -} - -/* - * This is used for most PIO data transfers *from* the IDE interface - * - * These routines will round up any request for an odd number of bytes, - * so if an odd len is specified, be sure that there's at least one - * extra byte allocated for the buffer. - */ -void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, - unsigned int len) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - unsigned long data_addr = io_ports->data_addr; - u8 io_32bit = drive->io_32bit; - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - len++; - - if (io_32bit) { - unsigned long uninitialized_var(flags); - - if ((io_32bit & 2) && !mmio) { - local_irq_save(flags); - ata_vlb_sync(io_ports->nsect_addr); - } - - if (mmio) - __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); - else - insl(data_addr, buf, len / 4); - - if ((io_32bit & 2) && !mmio) - local_irq_restore(flags); - - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - insw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); - else - insw(data_addr, buf, len / 2); - } -} -EXPORT_SYMBOL_GPL(ide_input_data); - -/* - * This is used for most PIO data transfers *to* the IDE interface - */ -void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, - unsigned int len) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - unsigned long data_addr = io_ports->data_addr; - u8 io_32bit = drive->io_32bit; - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - len++; - - if (io_32bit) { - unsigned long uninitialized_var(flags); - - if ((io_32bit & 2) && !mmio) { - local_irq_save(flags); - ata_vlb_sync(io_ports->nsect_addr); - } - - if (mmio) - __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); - else - outsl(data_addr, buf, len / 4); - - if ((io_32bit & 2) && !mmio) - local_irq_restore(flags); - - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - outsw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); - else - outsw(data_addr, buf, len / 2); - } -} -EXPORT_SYMBOL_GPL(ide_output_data); - u8 ide_read_error(ide_drive_t *drive) { ide_task_t task; @@ -362,35 +63,6 @@ u8 ide_read_error(ide_drive_t *drive) } EXPORT_SYMBOL_GPL(ide_read_error); -void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) -{ - ide_task_t task; - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | - IDE_TFLAG_IN_NSECT; - - drive->hwif->tp_ops->tf_read(drive, &task); - - *bcount = (task.tf.lbah << 8) | task.tf.lbam; - *ireason = task.tf.nsect & 3; -} -EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); - -const struct ide_tp_ops default_tp_ops = { - .exec_command = ide_exec_command, - .read_status = ide_read_status, - .read_altstatus = ide_read_altstatus, - - .set_irq = ide_set_irq, - - .tf_load = ide_tf_load, - .tf_read = ide_tf_read, - - .input_data = ide_input_data, - .output_data = ide_output_data, -}; - void ide_fix_driveid(u16 *id) { #ifndef __LITTLE_ENDIAN @@ -412,7 +84,7 @@ void ide_fix_driveid(u16 *id) * returned by the ATA_CMD_ID_ATA[PI] commands. */ -void ide_fixstring (u8 *s, const int bytecount, const int byteswap) +void ide_fixstring(u8 *s, const int bytecount, const int byteswap) { u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ @@ -435,44 +107,9 @@ void ide_fixstring (u8 *s, const int bytecount, const int byteswap) while (p != end) *p++ = '\0'; } - EXPORT_SYMBOL(ide_fixstring); /* - * Needed for PCI irq sharing - */ -int drive_is_ready (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - u8 stat = 0; - - if (drive->waiting_for_dma) - return hwif->dma_ops->dma_test_irq(drive); - - /* - * We do a passive status test under shared PCI interrupts on - * cards that truly share the ATA side interrupt, but may also share - * an interrupt with another pci card/device. We make no assumptions - * about possible isa-pnp and pci-pnp issues yet. - */ - if (hwif->io_ports.ctl_addr && - (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) - stat = hwif->tp_ops->read_altstatus(hwif); - else - /* Note: this may clear a pending IRQ!! */ - stat = hwif->tp_ops->read_status(hwif); - - if (stat & ATA_BUSY) - /* drive busy: definitely not interrupting */ - return 0; - - /* drive ready: *might* be interrupting */ - return 1; -} - -EXPORT_SYMBOL(drive_is_ready); - -/* * This routine busy-waits for the drive status to be not "busy". * It then checks the status for all of the "good" bits and none * of the "bad" bits, and if all is okay it returns 0. All other @@ -483,7 +120,8 @@ EXPORT_SYMBOL(drive_is_ready); * setting a timer to wake up at half second intervals thereafter, * until timeout is achieved, before timing out. */ -static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) +static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, + unsigned long timeout, u8 *rstat) { ide_hwif_t *hwif = drive->hwif; const struct ide_tp_ops *tp_ops = hwif->tp_ops; @@ -541,7 +179,8 @@ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long ti * The caller should return the updated value of "startstop" in this case, * "startstop" is unchanged when the function returns 0. */ -int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) +int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, + u8 bad, unsigned long timeout) { int err; u8 stat; @@ -561,7 +200,6 @@ int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 ba return err; } - EXPORT_SYMBOL(ide_wait_stat); /** @@ -582,7 +220,6 @@ int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) return 1; return 0; } - EXPORT_SYMBOL_GPL(ide_in_drive_list); /* @@ -607,7 +244,7 @@ static const struct drive_list_entry ivb_list[] = { * All hosts that use the 80c ribbon must use! * The name is derived from upper byte of word 93 and the 80c ribbon. */ -u8 eighty_ninty_three (ide_drive_t *drive) +u8 eighty_ninty_three(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; u16 *id = drive->id; @@ -652,47 +289,19 @@ no_80w: int ide_driveid_update(ide_drive_t *drive) { - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; u16 *id; - unsigned long flags; - u8 stat; - - /* - * Re-read drive->id for possible DMA mode - * change (copied from ide-probe.c) - */ - - SELECT_MASK(drive, 1); - tp_ops->set_irq(hwif, 0); - msleep(50); - tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); + int rc; - if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { - SELECT_MASK(drive, 0); + id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); + if (id == NULL) return 0; - } - - msleep(50); /* wait for IRQ and ATA_DRQ */ - stat = tp_ops->read_status(hwif); - if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { - SELECT_MASK(drive, 0); - printk("%s: CHECK for good STATUS\n", drive->name); - return 0; - } - local_irq_save(flags); + SELECT_MASK(drive, 1); + rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id); SELECT_MASK(drive, 0); - id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); - if (!id) { - local_irq_restore(flags); - return 0; - } - tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); - (void)tp_ops->read_status(hwif); /* clear drive IRQ */ - local_irq_enable(); - local_irq_restore(flags); - ide_fix_driveid(id); + + if (rc) + goto out_err; drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; @@ -705,6 +314,12 @@ int ide_driveid_update(ide_drive_t *drive) ide_dma_off(drive); return 1; +out_err: + SELECT_MASK(drive, 0); + if (rc == 2) + printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); + kfree(id); + return 0; } int ide_config_drive_speed(ide_drive_t *drive, u8 speed) @@ -731,18 +346,15 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) * but for some reason these don't work at * this point (lost interrupt). */ - /* - * Select the drive, and issue the SETFEATURES command - */ - disable_irq_nosync(hwif->irq); - + /* * FIXME: we race against the running IRQ here if * this is called from non IRQ context. If we use * disable_irq() we hang on the error path. Work * is needed. */ - + disable_irq_nosync(hwif->irq); + udelay(1); SELECT_DRIVE(drive); SELECT_MASK(drive, 1); @@ -812,8 +424,8 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) * * See also ide_execute_command */ -static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, - unsigned int timeout, ide_expiry_t *expiry) +void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, + unsigned int timeout, ide_expiry_t *expiry) { ide_hwif_t *hwif = drive->hwif; @@ -835,9 +447,8 @@ void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, __ide_set_handler(drive, handler, timeout, expiry); spin_unlock_irqrestore(&hwif->lock, flags); } - EXPORT_SYMBOL(ide_set_handler); - + /** * ide_execute_command - execute an IDE command * @drive: IDE drive to issue the command against @@ -847,7 +458,7 @@ EXPORT_SYMBOL(ide_set_handler); * @expiry: handler to run on timeout * * Helper function to issue an IDE command. This handles the - * atomicity requirements, command timing and ensures that the + * atomicity requirements, command timing and ensures that the * handler and IRQ setup do not race. All IDE command kick off * should go via this function or do equivalent locking. */ @@ -884,301 +495,6 @@ void ide_execute_pkt_cmd(ide_drive_t *drive) } EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); -static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) -{ - struct request *rq = drive->hwif->rq; - - if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) - ide_end_request(drive, err ? err : 1, 0); -} - -/* needed below */ -static ide_startstop_t do_reset1 (ide_drive_t *, int); - -/* - * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms - * during an atapi drive reset operation. If the drive has not yet responded, - * and we have not yet hit our maximum waiting time, then the timer is restarted - * for another 50ms. - */ -static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - u8 stat; - - SELECT_DRIVE(drive); - udelay (10); - stat = hwif->tp_ops->read_status(hwif); - - if (OK_STAT(stat, 0, ATA_BUSY)) - printk("%s: ATAPI reset complete\n", drive->name); - else { - if (time_before(jiffies, hwif->poll_timeout)) { - ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); - /* continue polling */ - return ide_started; - } - /* end of polling */ - hwif->polling = 0; - printk("%s: ATAPI reset timed-out, status=0x%02x\n", - drive->name, stat); - /* do it the old fashioned way */ - return do_reset1(drive, 1); - } - /* done polling */ - hwif->polling = 0; - ide_complete_drive_reset(drive, 0); - return ide_stopped; -} - -static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) -{ - static const char *err_master_vals[] = - { NULL, "passed", "formatter device error", - "sector buffer error", "ECC circuitry error", - "controlling MPU error" }; - - u8 err_master = err & 0x7f; - - printk(KERN_ERR "%s: reset: master: ", hwif->name); - if (err_master && err_master < 6) - printk(KERN_CONT "%s", err_master_vals[err_master]); - else - printk(KERN_CONT "error (0x%02x?)", err); - if (err & 0x80) - printk(KERN_CONT "; slave: failed"); - printk(KERN_CONT "\n"); -} - -/* - * reset_pollfunc() gets invoked to poll the interface for completion every 50ms - * during an ide reset operation. If the drives have not yet responded, - * and we have not yet hit our maximum waiting time, then the timer is restarted - * for another 50ms. - */ -static ide_startstop_t reset_pollfunc (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - u8 tmp; - int err = 0; - - if (port_ops && port_ops->reset_poll) { - err = port_ops->reset_poll(drive); - if (err) { - printk(KERN_ERR "%s: host reset_poll failure for %s.\n", - hwif->name, drive->name); - goto out; - } - } - - tmp = hwif->tp_ops->read_status(hwif); - - if (!OK_STAT(tmp, 0, ATA_BUSY)) { - if (time_before(jiffies, hwif->poll_timeout)) { - ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); - /* continue polling */ - return ide_started; - } - printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); - drive->failures++; - err = -EIO; - } else { - tmp = ide_read_error(drive); - - if (tmp == 1) { - printk(KERN_INFO "%s: reset: success\n", hwif->name); - drive->failures = 0; - } else { - ide_reset_report_error(hwif, tmp); - drive->failures++; - err = -EIO; - } - } -out: - hwif->polling = 0; /* done polling */ - ide_complete_drive_reset(drive, err); - return ide_stopped; -} - -static void ide_disk_pre_reset(ide_drive_t *drive) -{ - int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; - - drive->special.all = 0; - drive->special.b.set_geometry = legacy; - drive->special.b.recalibrate = legacy; - - drive->mult_count = 0; - drive->dev_flags &= ~IDE_DFLAG_PARKED; - - if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && - (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) - drive->mult_req = 0; - - if (drive->mult_req != drive->mult_count) - drive->special.b.set_multmode = 1; -} - -static void pre_reset(ide_drive_t *drive) -{ - const struct ide_port_ops *port_ops = drive->hwif->port_ops; - - if (drive->media == ide_disk) - ide_disk_pre_reset(drive); - else - drive->dev_flags |= IDE_DFLAG_POST_RESET; - - if (drive->dev_flags & IDE_DFLAG_USING_DMA) { - if (drive->crc_count) - ide_check_dma_crc(drive); - else - ide_dma_off(drive); - } - - if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { - if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { - drive->dev_flags &= ~IDE_DFLAG_UNMASK; - drive->io_32bit = 0; - } - return; - } - - if (port_ops && port_ops->pre_reset) - port_ops->pre_reset(drive); - - if (drive->current_speed != 0xff) - drive->desired_speed = drive->current_speed; - drive->current_speed = 0xff; -} - -/* - * do_reset1() attempts to recover a confused drive by resetting it. - * Unfortunately, resetting a disk drive actually resets all devices on - * the same interface, so it can really be thought of as resetting the - * interface rather than resetting the drive. - * - * ATAPI devices have their own reset mechanism which allows them to be - * individually reset without clobbering other devices on the same interface. - * - * Unfortunately, the IDE interface does not generate an interrupt to let - * us know when the reset operation has finished, so we must poll for this. - * Equally poor, though, is the fact that this may a very long time to complete, - * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, - * we set a timer to poll at 50ms intervals. - */ -static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - const struct ide_port_ops *port_ops; - ide_drive_t *tdrive; - unsigned long flags, timeout; - int i; - DEFINE_WAIT(wait); - - spin_lock_irqsave(&hwif->lock, flags); - - /* We must not reset with running handlers */ - BUG_ON(hwif->handler != NULL); - - /* For an ATAPI device, first try an ATAPI SRST. */ - if (drive->media != ide_disk && !do_not_try_atapi) { - pre_reset(drive); - SELECT_DRIVE(drive); - udelay (20); - tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); - ndelay(400); - hwif->poll_timeout = jiffies + WAIT_WORSTCASE; - hwif->polling = 1; - __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); - spin_unlock_irqrestore(&hwif->lock, flags); - return ide_started; - } - - /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ - do { - unsigned long now; - - prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); - timeout = jiffies; - ide_port_for_each_dev(i, tdrive, hwif) { - if (tdrive->dev_flags & IDE_DFLAG_PRESENT && - tdrive->dev_flags & IDE_DFLAG_PARKED && - time_after(tdrive->sleep, timeout)) - timeout = tdrive->sleep; - } - - now = jiffies; - if (time_before_eq(timeout, now)) - break; - - spin_unlock_irqrestore(&hwif->lock, flags); - timeout = schedule_timeout_uninterruptible(timeout - now); - spin_lock_irqsave(&hwif->lock, flags); - } while (timeout); - finish_wait(&ide_park_wq, &wait); - - /* - * First, reset any device state data we were maintaining - * for any of the drives on this interface. - */ - ide_port_for_each_dev(i, tdrive, hwif) - pre_reset(tdrive); - - if (io_ports->ctl_addr == 0) { - spin_unlock_irqrestore(&hwif->lock, flags); - ide_complete_drive_reset(drive, -ENXIO); - return ide_stopped; - } - - /* - * Note that we also set nIEN while resetting the device, - * to mask unwanted interrupts from the interface during the reset. - * However, due to the design of PC hardware, this will cause an - * immediate interrupt due to the edge transition it produces. - * This single interrupt gives us a "fast poll" for drives that - * recover from reset very quickly, saving us the first 50ms wait time. - * - * TODO: add ->softreset method and stop abusing ->set_irq - */ - /* set SRST and nIEN */ - tp_ops->set_irq(hwif, 4); - /* more than enough time */ - udelay(10); - /* clear SRST, leave nIEN (unless device is on the quirk list) */ - tp_ops->set_irq(hwif, drive->quirk_list == 2); - /* more than enough time */ - udelay(10); - hwif->poll_timeout = jiffies + WAIT_WORSTCASE; - hwif->polling = 1; - __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); - - /* - * Some weird controller like resetting themselves to a strange - * state when the disks are reset this way. At least, the Winbond - * 553 documentation says that - */ - port_ops = hwif->port_ops; - if (port_ops && port_ops->resetproc) - port_ops->resetproc(drive); - - spin_unlock_irqrestore(&hwif->lock, flags); - return ide_started; -} - -/* - * ide_do_reset() is the entry point to the drive/interface reset code. - */ - -ide_startstop_t ide_do_reset (ide_drive_t *drive) -{ - return do_reset1(drive, 0); -} - -EXPORT_SYMBOL(ide_do_reset); - /* * ide_wait_not_busy() waits for the currently selected device on the hwif * to report a non-busy status, see comments in ide_probe_port(). @@ -1187,7 +503,7 @@ int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) { u8 stat = 0; - while(timeout--) { + while (timeout--) { /* * Turn this into a schedule() sleep once I'm sure * about locking issues (2.5 work ?). diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index 09526a0de734..f6c683dd2987 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -5,163 +5,6 @@ #include <linux/ide.h> #include <linux/bitops.h> -static const char *udma_str[] = - { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44", - "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" }; -static const char *mwdma_str[] = - { "MWDMA0", "MWDMA1", "MWDMA2" }; -static const char *swdma_str[] = - { "SWDMA0", "SWDMA1", "SWDMA2" }; -static const char *pio_str[] = - { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" }; - -/** - * ide_xfer_verbose - return IDE mode names - * @mode: transfer mode - * - * Returns a constant string giving the name of the mode - * requested. - */ - -const char *ide_xfer_verbose(u8 mode) -{ - const char *s; - u8 i = mode & 0xf; - - if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7) - s = udma_str[i]; - else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2) - s = mwdma_str[i]; - else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2) - s = swdma_str[i]; - else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5) - s = pio_str[i & 0x7]; - else if (mode == XFER_PIO_SLOW) - s = "PIO SLOW"; - else - s = "XFER ERROR"; - - return s; -} -EXPORT_SYMBOL(ide_xfer_verbose); - -/** - * ide_rate_filter - filter transfer mode - * @drive: IDE device - * @speed: desired speed - * - * Given the available transfer modes this function returns - * the best available speed at or below the speed requested. - * - * TODO: check device PIO capabilities - */ - -static u8 ide_rate_filter(ide_drive_t *drive, u8 speed) -{ - ide_hwif_t *hwif = drive->hwif; - u8 mode = ide_find_dma_mode(drive, speed); - - if (mode == 0) { - if (hwif->pio_mask) - mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0; - else - mode = XFER_PIO_4; - } - -/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */ - - return min(speed, mode); -} - -/** - * ide_get_best_pio_mode - get PIO mode from drive - * @drive: drive to consider - * @mode_wanted: preferred mode - * @max_mode: highest allowed mode - * - * This routine returns the recommended PIO settings for a given drive, - * based on the drive->id information and the ide_pio_blacklist[]. - * - * Drive PIO mode is auto-selected if 255 is passed as mode_wanted. - * This is used by most chipset support modules when "auto-tuning". - */ - -u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode) -{ - u16 *id = drive->id; - int pio_mode = -1, overridden = 0; - - if (mode_wanted != 255) - return min_t(u8, mode_wanted, max_mode); - - if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0) - pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]); - - if (pio_mode != -1) { - printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); - } else { - pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8; - if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ - pio_mode = 2; - overridden = 1; - } - - if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */ - if (ata_id_has_iordy(id)) { - if (id[ATA_ID_PIO_MODES] & 7) { - overridden = 0; - if (id[ATA_ID_PIO_MODES] & 4) - pio_mode = 5; - else if (id[ATA_ID_PIO_MODES] & 2) - pio_mode = 4; - else - pio_mode = 3; - } - } - } - - if (overridden) - printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n", - drive->name); - } - - if (pio_mode > max_mode) - pio_mode = max_mode; - - return pio_mode; -} -EXPORT_SYMBOL_GPL(ide_get_best_pio_mode); - -/* req_pio == "255" for auto-tune */ -void ide_set_pio(ide_drive_t *drive, u8 req_pio) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - u8 host_pio, pio; - - if (port_ops == NULL || port_ops->set_pio_mode == NULL || - (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) - return; - - BUG_ON(hwif->pio_mask == 0x00); - - host_pio = fls(hwif->pio_mask) - 1; - - pio = ide_get_best_pio_mode(drive, req_pio, host_pio); - - /* - * TODO: - * - report device max PIO mode - * - check req_pio != 255 against device max PIO mode - */ - printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n", - drive->name, host_pio, req_pio, - req_pio == 255 ? "(auto-tune)" : "", pio); - - (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio); -} -EXPORT_SYMBOL_GPL(ide_set_pio); - /** * ide_toggle_bounce - handle bounce buffering * @drive: drive to update @@ -188,89 +31,6 @@ void ide_toggle_bounce(ide_drive_t *drive, int on) blk_queue_bounce_limit(drive->queue, addr); } -int ide_set_pio_mode(ide_drive_t *drive, const u8 mode) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - - if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) - return 0; - - if (port_ops == NULL || port_ops->set_pio_mode == NULL) - return -1; - - /* - * TODO: temporary hack for some legacy host drivers that didn't - * set transfer mode on the device in ->set_pio_mode method... - */ - if (port_ops->set_dma_mode == NULL) { - port_ops->set_pio_mode(drive, mode - XFER_PIO_0); - return 0; - } - - if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { - if (ide_config_drive_speed(drive, mode)) - return -1; - port_ops->set_pio_mode(drive, mode - XFER_PIO_0); - return 0; - } else { - port_ops->set_pio_mode(drive, mode - XFER_PIO_0); - return ide_config_drive_speed(drive, mode); - } -} - -int ide_set_dma_mode(ide_drive_t *drive, const u8 mode) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - - if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) - return 0; - - if (port_ops == NULL || port_ops->set_dma_mode == NULL) - return -1; - - if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { - if (ide_config_drive_speed(drive, mode)) - return -1; - port_ops->set_dma_mode(drive, mode); - return 0; - } else { - port_ops->set_dma_mode(drive, mode); - return ide_config_drive_speed(drive, mode); - } -} -EXPORT_SYMBOL_GPL(ide_set_dma_mode); - -/** - * ide_set_xfer_rate - set transfer rate - * @drive: drive to set - * @rate: speed to attempt to set - * - * General helper for setting the speed of an IDE device. This - * function knows about user enforced limits from the configuration - * which ->set_pio_mode/->set_dma_mode does not. - */ - -int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - - if (port_ops == NULL || port_ops->set_dma_mode == NULL || - (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) - return -1; - - rate = ide_rate_filter(drive, rate); - - BUG_ON(rate < XFER_PIO_0); - - if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5) - return ide_set_pio_mode(drive, rate); - - return ide_set_dma_mode(drive, rate); -} - static void ide_dump_opcode(ide_drive_t *drive) { struct request *rq = drive->hwif->rq; diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c index c875a957596c..f30e52152fcb 100644 --- a/drivers/ide/ide-park.c +++ b/drivers/ide/ide-park.c @@ -1,5 +1,6 @@ #include <linux/kernel.h> #include <linux/ide.h> +#include <linux/hdreg.h> #include <linux/jiffies.h> #include <linux/blkdev.h> @@ -60,6 +61,30 @@ out: return; } +ide_startstop_t ide_do_park_unpark(ide_drive_t *drive, struct request *rq) +{ + ide_task_t task; + struct ide_taskfile *tf = &task.tf; + + memset(&task, 0, sizeof(task)); + if (rq->cmd[0] == REQ_PARK_HEADS) { + drive->sleep = *(unsigned long *)rq->special; + drive->dev_flags |= IDE_DFLAG_SLEEPING; + tf->command = ATA_CMD_IDLEIMMEDIATE; + tf->feature = 0x44; + tf->lbal = 0x4c; + tf->lbam = 0x4e; + tf->lbah = 0x55; + task.tf_flags |= IDE_TFLAG_CUSTOM_HANDLER; + } else /* cmd == REQ_UNPARK_HEADS */ + tf->command = ATA_CMD_CHK_POWER; + + task.tf_flags |= IDE_TFLAG_TF | IDE_TFLAG_DEVICE; + task.rq = rq; + drive->hwif->data_phase = task.data_phase = TASKFILE_NO_DATA; + return do_rw_taskfile(drive, &task); +} + ssize_t ide_park_show(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/drivers/ide/ide-pci-generic.c b/drivers/ide/ide-pci-generic.c index bddae2b329a0..61111fd27130 100644 --- a/drivers/ide/ide-pci-generic.c +++ b/drivers/ide/ide-pci-generic.c @@ -33,8 +33,6 @@ static int ide_generic_all; /* Set to claim all devices */ module_param_named(all_generic_ide, ide_generic_all, bool, 0444); MODULE_PARM_DESC(all_generic_ide, "IDE generic will claim all unknown PCI IDE storage controllers."); -#define IDE_HFLAGS_UMC (IDE_HFLAG_NO_DMA | IDE_HFLAG_FORCE_LEGACY_IRQS) - #define DECLARE_GENERIC_PCI_DEV(extra_flags) \ { \ .name = DRV_NAME, \ @@ -61,7 +59,7 @@ static const struct ide_port_info generic_chipsets[] __devinitdata = { /* 2: SAMURAI / HT6565 / HINT_IDE */ DECLARE_GENERIC_PCI_DEV(0), /* 3: UM8673F / UM8886A / UM8886BF */ - DECLARE_GENERIC_PCI_DEV(IDE_HFLAGS_UMC), + DECLARE_GENERIC_PCI_DEV(IDE_HFLAG_NO_DMA), /* 4: VIA_IDE / OPTI621V / Piccolo010{2,3,5} */ DECLARE_GENERIC_PCI_DEV(IDE_HFLAG_NO_AUTODMA), diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index ee8e3e7cad51..974067043fba 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -181,16 +181,16 @@ static void ide_classify_atapi_dev(ide_drive_t *drive) * do_identify - identify a drive * @drive: drive to identify * @cmd: command used + * @id: buffer for IDENTIFY data * * Called when we have issued a drive identify command to * read and parse the results. This function is run with * interrupts disabled. */ -static void do_identify(ide_drive_t *drive, u8 cmd) +static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) { ide_hwif_t *hwif = drive->hwif; - u16 *id = drive->id; char *m = (char *)&id[ATA_ID_PROD]; unsigned long flags; int bswap = 1; @@ -233,16 +233,6 @@ static void do_identify(ide_drive_t *drive, u8 cmd) drive->dev_flags |= IDE_DFLAG_PRESENT; drive->dev_flags &= ~IDE_DFLAG_DEAD; - /* - * Check for an ATAPI device - */ - if (cmd == ATA_CMD_ID_ATAPI) - ide_classify_atapi_dev(drive); - else - /* - * Not an ATAPI device: looks like a "regular" hard disk - */ - ide_classify_ata_dev(drive); return; err_misc: kfree(id); @@ -250,21 +240,19 @@ err_misc: } /** - * actual_try_to_identify - send ata/atapi identify + * ide_dev_read_id - send ATA/ATAPI IDENTIFY command * @drive: drive to identify * @cmd: command to use + * @id: buffer for IDENTIFY data * - * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive - * and waits for a response. It also monitors irqs while this is - * happening, in hope of automatically determining which one is - * being used by the interface. + * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) */ -static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) +int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; @@ -273,6 +261,13 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) unsigned long timeout; u8 s = 0, a = 0; + /* + * Disable device IRQ. Otherwise we'll get spurious interrupts + * during the identify phase that the IRQ handler isn't expecting. + */ + if (io_ports->ctl_addr) + tp_ops->set_irq(hwif, 0); + /* take a deep breath */ msleep(50); @@ -317,7 +312,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { /* drive returned ID */ - do_identify(drive, cmd); + do_identify(drive, cmd, id); /* drive responded with ID */ rc = 0; /* clear drive IRQ */ @@ -329,63 +324,6 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) return rc; } -/** - * try_to_identify - try to identify a drive - * @drive: drive to probe - * @cmd: command to use - * - * Issue the identify command and then do IRQ probing to - * complete the identification when needed by finding the - * IRQ the drive is attached to - */ - -static int try_to_identify (ide_drive_t *drive, u8 cmd) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - int retval; - int autoprobe = 0; - unsigned long cookie = 0; - - /* - * Disable device irq unless we need to - * probe for it. Otherwise we'll get spurious - * interrupts during the identify-phase that - * the irq handler isn't expecting. - */ - if (hwif->io_ports.ctl_addr) { - if (!hwif->irq) { - autoprobe = 1; - cookie = probe_irq_on(); - } - tp_ops->set_irq(hwif, autoprobe); - } - - retval = actual_try_to_identify(drive, cmd); - - if (autoprobe) { - int irq; - - tp_ops->set_irq(hwif, 0); - /* clear drive IRQ */ - (void)tp_ops->read_status(hwif); - udelay(5); - irq = probe_irq_off(cookie); - if (!hwif->irq) { - if (irq > 0) { - hwif->irq = irq; - } else { - /* Mmmm.. multiple IRQs.. - * don't know which was ours - */ - printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", - drive->name, cookie); - } - } - } - return retval; -} - int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) { u8 stat; @@ -440,6 +378,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd) { ide_hwif_t *hwif = drive->hwif; const struct ide_tp_ops *tp_ops = hwif->tp_ops; + u16 *id = drive->id; int rc; u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; @@ -475,11 +414,10 @@ static int do_probe (ide_drive_t *drive, u8 cmd) if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || present || cmd == ATA_CMD_ID_ATAPI) { - /* send cmd and wait */ - if ((rc = try_to_identify(drive, cmd))) { + rc = ide_dev_read_id(drive, cmd, id); + if (rc) /* failed: try again */ - rc = try_to_identify(drive,cmd); - } + rc = ide_dev_read_id(drive, cmd, id); stat = tp_ops->read_status(hwif); @@ -494,7 +432,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd) msleep(50); tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); - rc = try_to_identify(drive, cmd); + rc = ide_dev_read_id(drive, cmd, id); } /* ensure drive IRQ is clear */ @@ -517,37 +455,6 @@ static int do_probe (ide_drive_t *drive, u8 cmd) return rc; } -/* - * - */ -static void enable_nest (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - u8 stat; - - printk(KERN_INFO "%s: enabling %s -- ", - hwif->name, (char *)&drive->id[ATA_ID_PROD]); - - SELECT_DRIVE(drive); - msleep(50); - tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); - - if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { - printk(KERN_CONT "failed (timeout)\n"); - return; - } - - msleep(50); - - stat = tp_ops->read_status(hwif); - - if (!OK_STAT(stat, 0, BAD_STAT)) - printk(KERN_CONT "failed (status = 0x%02x)\n", stat); - else - printk(KERN_CONT "success\n"); -} - /** * probe_for_drives - upper level drive probe * @drive: drive to probe for @@ -563,6 +470,8 @@ static void enable_nest (ide_drive_t *drive) static u8 probe_for_drive(ide_drive_t *drive) { char *m; + int rc; + u8 cmd; /* * In order to keep things simple we have an id @@ -586,21 +495,19 @@ static u8 probe_for_drive(ide_drive_t *drive) /* skip probing? */ if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { -retry: /* if !(success||timed-out) */ - if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) + cmd = ATA_CMD_ID_ATA; + rc = do_probe(drive, cmd); + if (rc >= 2) { /* look for ATAPI device */ - (void)do_probe(drive, ATA_CMD_ID_ATAPI); + cmd = ATA_CMD_ID_ATAPI; + rc = do_probe(drive, cmd); + } if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) /* drive not found */ return 0; - if (strstr(m, "E X A B Y T E N E S T")) { - enable_nest(drive); - goto retry; - } - /* identification failed? */ if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { if (drive->media == ide_disk) { @@ -614,8 +521,12 @@ retry: printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); drive->dev_flags &= ~IDE_DFLAG_PRESENT; } + } else { + if (cmd == ATA_CMD_ID_ATAPI) + ide_classify_atapi_dev(drive); + else + ide_classify_ata_dev(drive); } - /* drive was found */ } if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) @@ -779,7 +690,6 @@ EXPORT_SYMBOL_GPL(ide_undecoded_slave); static int ide_probe_port(ide_hwif_t *hwif) { ide_drive_t *drive; - unsigned long flags; unsigned int irqd; int i, rc = -ENODEV; @@ -797,9 +707,6 @@ static int ide_probe_port(ide_hwif_t *hwif) if (irqd) disable_irq(hwif->irq); - local_save_flags(flags); - local_irq_enable_in_hardirq(); - if (ide_port_wait_ready(hwif) == -EBUSY) printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); @@ -813,8 +720,6 @@ static int ide_probe_port(ide_hwif_t *hwif) rc = 0; } - local_irq_restore(flags); - /* * Use cached IRQ number. It might be (and is...) changed by probe * code above @@ -831,29 +736,18 @@ static void ide_port_tune_devices(ide_hwif_t *hwif) ide_drive_t *drive; int i; - ide_port_for_each_dev(i, drive, hwif) { - if (drive->dev_flags & IDE_DFLAG_PRESENT) { - if (port_ops && port_ops->quirkproc) - port_ops->quirkproc(drive); - } + ide_port_for_each_present_dev(i, drive, hwif) { + if (port_ops && port_ops->quirkproc) + port_ops->quirkproc(drive); } - ide_port_for_each_dev(i, drive, hwif) { - if (drive->dev_flags & IDE_DFLAG_PRESENT) { - ide_set_max_pio(drive); + ide_port_for_each_present_dev(i, drive, hwif) { + ide_set_max_pio(drive); - drive->dev_flags |= IDE_DFLAG_NICE1; - - if (hwif->dma_ops) - ide_set_dma(drive); - } - } + drive->dev_flags |= IDE_DFLAG_NICE1; - ide_port_for_each_dev(i, drive, hwif) { - if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) - drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; - else - drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; + if (hwif->dma_ops) + ide_set_dma(drive); } } @@ -924,10 +818,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif) int i, j = 0; mutex_lock(&ide_cfg_mtx); - ide_port_for_each_dev(i, drive, hwif) { - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) - continue; - + ide_port_for_each_present_dev(i, drive, hwif) { if (ide_init_queue(drive)) { printk(KERN_ERR "ide: failed to init %s\n", drive->name); @@ -953,13 +844,6 @@ static int init_irq (ide_hwif_t *hwif) irq_handler_t irq_handler; int sa = 0; - mutex_lock(&ide_cfg_mtx); - spin_lock_init(&hwif->lock); - - init_timer(&hwif->timer); - hwif->timer.function = &ide_timer_expiry; - hwif->timer.data = (unsigned long)hwif; - irq_handler = hwif->host->irq_handler; if (irq_handler == NULL) irq_handler = ide_intr; @@ -997,10 +881,8 @@ static int init_irq (ide_hwif_t *hwif) printk(KERN_CONT " (serialized)"); printk(KERN_CONT "\n"); - mutex_unlock(&ide_cfg_mtx); return 0; out_up: - mutex_unlock(&ide_cfg_mtx); return 1; } @@ -1099,14 +981,9 @@ static void drive_release_dev (struct device *dev) static int hwif_init(ide_hwif_t *hwif) { - int old_irq; - if (!hwif->irq) { - hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); - if (!hwif->irq) { - printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); - return 0; - } + printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); + return 0; } if (register_blkdev(hwif->major, hwif->name)) @@ -1124,29 +1001,12 @@ static int hwif_init(ide_hwif_t *hwif) sg_init_table(hwif->sg_table, hwif->sg_max_nents); - if (init_irq(hwif) == 0) - goto done; - - old_irq = hwif->irq; - /* - * It failed to initialise. Find the default IRQ for - * this port and try that. - */ - hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); - if (!hwif->irq) { - printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", - hwif->name, old_irq); - goto out; - } if (init_irq(hwif)) { - printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", - hwif->name, old_irq, hwif->irq); + printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", + hwif->name, hwif->irq); goto out; } - printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", - hwif->name, hwif->irq); -done: blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, THIS_MODULE, ata_probe, ata_lock, hwif); return 1; @@ -1161,13 +1021,10 @@ static void hwif_register_devices(ide_hwif_t *hwif) ide_drive_t *drive; unsigned int i; - ide_port_for_each_dev(i, drive, hwif) { + ide_port_for_each_present_dev(i, drive, hwif) { struct device *dev = &drive->gendev; int ret; - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) - continue; - dev_set_name(dev, "%u.%u", hwif->index, i); dev->parent = &hwif->gendev; dev->bus = &ide_bus_type; @@ -1192,6 +1049,8 @@ static void ide_port_init_devices(ide_hwif_t *hwif) if (hwif->host_flags & IDE_HFLAG_IO_32BIT) drive->io_32bit = 1; + if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) + drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) drive->dev_flags |= IDE_DFLAG_UNMASK; if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) @@ -1213,10 +1072,6 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port, if (d->init_iops) d->init_iops(hwif); - if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || - (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) - hwif->irq = port ? 15 : 14; - /* ->host_flags may be set by ->init_iops (or even earlier...) */ hwif->host_flags |= d->host_flags; hwif->pio_mask = d->pio_mask; @@ -1317,6 +1172,12 @@ static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) hwif->name[2] = 'e'; hwif->name[3] = '0' + index; + spin_lock_init(&hwif->lock); + + init_timer(&hwif->timer); + hwif->timer.function = &ide_timer_expiry; + hwif->timer.data = (unsigned long)hwif; + init_completion(&hwif->gendev_rel_comp); hwif->tp_ops = &default_tp_ops; @@ -1567,7 +1428,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d, j++; - ide_acpi_init(hwif); + ide_acpi_init_port(hwif); if (hwif->present) ide_acpi_port_init_devices(hwif); @@ -1624,11 +1485,9 @@ static void __ide_port_unregister_devices(ide_hwif_t *hwif) ide_drive_t *drive; int i; - ide_port_for_each_dev(i, drive, hwif) { - if (drive->dev_flags & IDE_DFLAG_PRESENT) { - device_unregister(&drive->gendev); - wait_for_completion(&drive->gendev_rel_comp); - } + ide_port_for_each_present_dev(i, drive, hwif) { + device_unregister(&drive->gendev); + wait_for_completion(&drive->gendev_rel_comp); } } diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c index a7b9287ee0d4..417cde56eafd 100644 --- a/drivers/ide/ide-proc.c +++ b/drivers/ide/ide-proc.c @@ -600,7 +600,7 @@ void ide_proc_port_register_devices(ide_hwif_t *hwif) int i; ide_port_for_each_dev(i, drive, hwif) { - if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0 || drive->proc) + if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) continue; drive->proc = proc_mkdir(drive->name, parent); diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c new file mode 100644 index 000000000000..6910f6a257e8 --- /dev/null +++ b/drivers/ide/ide-xfer-mode.c @@ -0,0 +1,246 @@ +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/ide.h> +#include <linux/bitops.h> + +static const char *udma_str[] = + { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44", + "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" }; +static const char *mwdma_str[] = + { "MWDMA0", "MWDMA1", "MWDMA2" }; +static const char *swdma_str[] = + { "SWDMA0", "SWDMA1", "SWDMA2" }; +static const char *pio_str[] = + { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" }; + +/** + * ide_xfer_verbose - return IDE mode names + * @mode: transfer mode + * + * Returns a constant string giving the name of the mode + * requested. + */ + +const char *ide_xfer_verbose(u8 mode) +{ + const char *s; + u8 i = mode & 0xf; + + if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7) + s = udma_str[i]; + else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2) + s = mwdma_str[i]; + else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2) + s = swdma_str[i]; + else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5) + s = pio_str[i & 0x7]; + else if (mode == XFER_PIO_SLOW) + s = "PIO SLOW"; + else + s = "XFER ERROR"; + + return s; +} +EXPORT_SYMBOL(ide_xfer_verbose); + +/** + * ide_get_best_pio_mode - get PIO mode from drive + * @drive: drive to consider + * @mode_wanted: preferred mode + * @max_mode: highest allowed mode + * + * This routine returns the recommended PIO settings for a given drive, + * based on the drive->id information and the ide_pio_blacklist[]. + * + * Drive PIO mode is auto-selected if 255 is passed as mode_wanted. + * This is used by most chipset support modules when "auto-tuning". + */ + +u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode) +{ + u16 *id = drive->id; + int pio_mode = -1, overridden = 0; + + if (mode_wanted != 255) + return min_t(u8, mode_wanted, max_mode); + + if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0) + pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]); + + if (pio_mode != -1) { + printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); + } else { + pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8; + if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ + pio_mode = 2; + overridden = 1; + } + + if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */ + if (ata_id_has_iordy(id)) { + if (id[ATA_ID_PIO_MODES] & 7) { + overridden = 0; + if (id[ATA_ID_PIO_MODES] & 4) + pio_mode = 5; + else if (id[ATA_ID_PIO_MODES] & 2) + pio_mode = 4; + else + pio_mode = 3; + } + } + } + + if (overridden) + printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n", + drive->name); + } + + if (pio_mode > max_mode) + pio_mode = max_mode; + + return pio_mode; +} +EXPORT_SYMBOL_GPL(ide_get_best_pio_mode); + +int ide_set_pio_mode(ide_drive_t *drive, const u8 mode) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + + if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) + return 0; + + if (port_ops == NULL || port_ops->set_pio_mode == NULL) + return -1; + + /* + * TODO: temporary hack for some legacy host drivers that didn't + * set transfer mode on the device in ->set_pio_mode method... + */ + if (port_ops->set_dma_mode == NULL) { + port_ops->set_pio_mode(drive, mode - XFER_PIO_0); + return 0; + } + + if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { + if (ide_config_drive_speed(drive, mode)) + return -1; + port_ops->set_pio_mode(drive, mode - XFER_PIO_0); + return 0; + } else { + port_ops->set_pio_mode(drive, mode - XFER_PIO_0); + return ide_config_drive_speed(drive, mode); + } +} + +int ide_set_dma_mode(ide_drive_t *drive, const u8 mode) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + + if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) + return 0; + + if (port_ops == NULL || port_ops->set_dma_mode == NULL) + return -1; + + if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { + if (ide_config_drive_speed(drive, mode)) + return -1; + port_ops->set_dma_mode(drive, mode); + return 0; + } else { + port_ops->set_dma_mode(drive, mode); + return ide_config_drive_speed(drive, mode); + } +} +EXPORT_SYMBOL_GPL(ide_set_dma_mode); + +/* req_pio == "255" for auto-tune */ +void ide_set_pio(ide_drive_t *drive, u8 req_pio) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + u8 host_pio, pio; + + if (port_ops == NULL || port_ops->set_pio_mode == NULL || + (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) + return; + + BUG_ON(hwif->pio_mask == 0x00); + + host_pio = fls(hwif->pio_mask) - 1; + + pio = ide_get_best_pio_mode(drive, req_pio, host_pio); + + /* + * TODO: + * - report device max PIO mode + * - check req_pio != 255 against device max PIO mode + */ + printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n", + drive->name, host_pio, req_pio, + req_pio == 255 ? "(auto-tune)" : "", pio); + + (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio); +} +EXPORT_SYMBOL_GPL(ide_set_pio); + +/** + * ide_rate_filter - filter transfer mode + * @drive: IDE device + * @speed: desired speed + * + * Given the available transfer modes this function returns + * the best available speed at or below the speed requested. + * + * TODO: check device PIO capabilities + */ + +static u8 ide_rate_filter(ide_drive_t *drive, u8 speed) +{ + ide_hwif_t *hwif = drive->hwif; + u8 mode = ide_find_dma_mode(drive, speed); + + if (mode == 0) { + if (hwif->pio_mask) + mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0; + else + mode = XFER_PIO_4; + } + +/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */ + + return min(speed, mode); +} + +/** + * ide_set_xfer_rate - set transfer rate + * @drive: drive to set + * @rate: speed to attempt to set + * + * General helper for setting the speed of an IDE device. This + * function knows about user enforced limits from the configuration + * which ->set_pio_mode/->set_dma_mode does not. + */ + +int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) +{ + ide_hwif_t *hwif = drive->hwif; + const struct ide_port_ops *port_ops = hwif->port_ops; + + if (port_ops == NULL || port_ops->set_dma_mode == NULL || + (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) + return -1; + + rate = ide_rate_filter(drive, rate); + + BUG_ON(rate < XFER_PIO_0); + + if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5) + return ide_set_pio_mode(drive, rate); + + return ide_set_dma_mode(drive, rate); +} diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 0920e3b0c962..92c9b90931e7 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -62,160 +62,6 @@ struct class *ide_port_class; -/* - * Locks for IDE setting functionality - */ - -DEFINE_MUTEX(ide_setting_mtx); - -ide_devset_get(io_32bit, io_32bit); - -static int set_io_32bit(ide_drive_t *drive, int arg) -{ - if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) - return -EPERM; - - if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) - return -EINVAL; - - drive->io_32bit = arg; - - return 0; -} - -ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS); - -static int set_ksettings(ide_drive_t *drive, int arg) -{ - if (arg < 0 || arg > 1) - return -EINVAL; - - if (arg) - drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS; - else - drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS; - - return 0; -} - -ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA); - -static int set_using_dma(ide_drive_t *drive, int arg) -{ -#ifdef CONFIG_BLK_DEV_IDEDMA - int err = -EPERM; - - if (arg < 0 || arg > 1) - return -EINVAL; - - if (ata_id_has_dma(drive->id) == 0) - goto out; - - if (drive->hwif->dma_ops == NULL) - goto out; - - err = 0; - - if (arg) { - if (ide_set_dma(drive)) - err = -EIO; - } else - ide_dma_off(drive); - -out: - return err; -#else - if (arg < 0 || arg > 1) - return -EINVAL; - - return -EPERM; -#endif -} - -/* - * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away - */ -static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) -{ - switch (req_pio) { - case 202: - case 201: - case 200: - case 102: - case 101: - case 100: - return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0; - case 9: - case 8: - return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0; - case 7: - case 6: - return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0; - default: - return 0; - } -} - -static int set_pio_mode(ide_drive_t *drive, int arg) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - - if (arg < 0 || arg > 255) - return -EINVAL; - - if (port_ops == NULL || port_ops->set_pio_mode == NULL || - (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) - return -ENOSYS; - - if (set_pio_mode_abuse(drive->hwif, arg)) { - if (arg == 8 || arg == 9) { - unsigned long flags; - - /* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ - spin_lock_irqsave(&hwif->lock, flags); - port_ops->set_pio_mode(drive, arg); - spin_unlock_irqrestore(&hwif->lock, flags); - } else - port_ops->set_pio_mode(drive, arg); - } else { - int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); - - ide_set_pio(drive, arg); - - if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) { - if (keep_dma) - ide_dma_on(drive); - } - } - - return 0; -} - -ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK); - -static int set_unmaskirq(ide_drive_t *drive, int arg) -{ - if (drive->dev_flags & IDE_DFLAG_NO_UNMASK) - return -EPERM; - - if (arg < 0 || arg > 1) - return -EINVAL; - - if (arg) - drive->dev_flags |= IDE_DFLAG_UNMASK; - else - drive->dev_flags &= ~IDE_DFLAG_UNMASK; - - return 0; -} - -ide_ext_devset_rw_sync(io_32bit, io_32bit); -ide_ext_devset_rw_sync(keepsettings, ksettings); -ide_ext_devset_rw_sync(unmaskirq, unmaskirq); -ide_ext_devset_rw_sync(using_dma, using_dma); -__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode); - /** * ide_device_get - get an additional reference to a ide_drive_t * @drive: device to get a reference to @@ -527,6 +373,8 @@ static int __init ide_init(void) goto out_port_class; } + ide_acpi_init(); + proc_ide_create(); return 0; diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c index 13b8153112ed..6b9fc950b4af 100644 --- a/drivers/ide/it821x.c +++ b/drivers/ide/it821x.c @@ -603,7 +603,7 @@ static void it8212_disable_raid(struct pci_dev *dev) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20); } -static unsigned int init_chipset_it821x(struct pci_dev *dev) +static int init_chipset_it821x(struct pci_dev *dev) { u8 conf; static char *mode[2] = { "pass through", "smart" }; diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c index 83643ed9a426..ea48a3ee8063 100644 --- a/drivers/ide/ns87415.c +++ b/drivers/ide/ns87415.c @@ -286,9 +286,7 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif) } if (!using_inta) - hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); - else if (!hwif->irq && hwif->mate && hwif->mate->irq) - hwif->irq = hwif->mate->irq; /* share IRQ with mate */ + hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel); if (!hwif->dma_base) return; diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c index f21290c4b447..b68906c3c17e 100644 --- a/drivers/ide/pdc202xx_new.c +++ b/drivers/ide/pdc202xx_new.c @@ -325,7 +325,7 @@ static void apple_kiwi_init(struct pci_dev *pdev) } #endif /* CONFIG_PPC_PMAC */ -static unsigned int init_chipset_pdcnew(struct pci_dev *dev) +static int init_chipset_pdcnew(struct pci_dev *dev) { const char *name = DRV_NAME; unsigned long dma_base = pci_resource_start(dev, 4); @@ -444,7 +444,7 @@ static unsigned int init_chipset_pdcnew(struct pci_dev *dev) #endif out: - return dev->irq; + return 0; } static struct pci_dev * __devinit pdc20270_get_dev2(struct pci_dev *dev) diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c index 97193323aebf..cba66ebce4e3 100644 --- a/drivers/ide/pdc202xx_old.c +++ b/drivers/ide/pdc202xx_old.c @@ -264,7 +264,7 @@ static void pdc202xx_dma_timeout(ide_drive_t *drive) ide_dma_timeout(drive); } -static unsigned int init_chipset_pdc202xx(struct pci_dev *dev) +static int init_chipset_pdc202xx(struct pci_dev *dev) { unsigned long dmabase = pci_resource_start(dev, 4); u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0; @@ -290,7 +290,7 @@ static unsigned int init_chipset_pdc202xx(struct pci_dev *dev) printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN"); } out: - return dev->irq; + return 0; } static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev, diff --git a/drivers/ide/piix.c b/drivers/ide/piix.c index f1e2e4ef0d71..2aa699933064 100644 --- a/drivers/ide/piix.c +++ b/drivers/ide/piix.c @@ -204,7 +204,7 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed) * out to be nice and simple. */ -static unsigned int init_chipset_ich(struct pci_dev *dev) +static int init_chipset_ich(struct pci_dev *dev) { u32 extra = 0; @@ -318,19 +318,12 @@ static const struct ide_port_ops ich_port_ops = { .cable_detect = piix_cable_detect, }; -#ifndef CONFIG_IA64 - #define IDE_HFLAGS_PIIX IDE_HFLAG_LEGACY_IRQS -#else - #define IDE_HFLAGS_PIIX 0 -#endif - #define DECLARE_PIIX_DEV(udma) \ { \ .name = DRV_NAME, \ .init_hwif = init_hwif_piix, \ .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \ .port_ops = &piix_port_ops, \ - .host_flags = IDE_HFLAGS_PIIX, \ .pio_mask = ATA_PIO4, \ .swdma_mask = ATA_SWDMA2_ONLY, \ .mwdma_mask = ATA_MWDMA12_ONLY, \ @@ -344,7 +337,6 @@ static const struct ide_port_ops ich_port_ops = { .init_hwif = init_hwif_piix, \ .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \ .port_ops = &ich_port_ops, \ - .host_flags = IDE_HFLAGS_PIIX, \ .pio_mask = ATA_PIO4, \ .swdma_mask = ATA_SWDMA2_ONLY, \ .mwdma_mask = ATA_MWDMA12_ONLY, \ @@ -360,8 +352,7 @@ static const struct ide_port_info piix_pci_info[] __devinitdata = { */ .name = DRV_NAME, .enablebits = {{0x6d,0xc0,0x80}, {0x6d,0xc0,0xc0}}, - .host_flags = IDE_HFLAG_ISA_PORTS | IDE_HFLAG_NO_DMA | - IDE_HFLAGS_PIIX, + .host_flags = IDE_HFLAG_ISA_PORTS | IDE_HFLAG_NO_DMA, .pio_mask = ATA_PIO4, /* This is a painful system best to let it self tune for now */ }, diff --git a/drivers/ide/serverworks.c b/drivers/ide/serverworks.c index 382102ba467b..b6554ef92716 100644 --- a/drivers/ide/serverworks.c +++ b/drivers/ide/serverworks.c @@ -175,7 +175,7 @@ static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed) pci_write_config_byte(dev, 0x54, ultra_enable); } -static unsigned int init_chipset_svwks(struct pci_dev *dev) +static int init_chipset_svwks(struct pci_dev *dev) { unsigned int reg; u8 btr; @@ -270,7 +270,7 @@ static unsigned int init_chipset_svwks(struct pci_dev *dev) pci_write_config_byte(dev, 0x5A, btr); } - return dev->irq; + return 0; } static u8 ata66_svwks_svwks(ide_hwif_t *hwif) @@ -353,14 +353,11 @@ static const struct ide_port_ops svwks_port_ops = { .cable_detect = svwks_cable_detect, }; -#define IDE_HFLAGS_SVWKS IDE_HFLAG_LEGACY_IRQS - static const struct ide_port_info serverworks_chipsets[] __devinitdata = { { /* 0: OSB4 */ .name = DRV_NAME, .init_chipset = init_chipset_svwks, .port_ops = &osb4_port_ops, - .host_flags = IDE_HFLAGS_SVWKS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = 0x00, /* UDMA is problematic on OSB4 */ @@ -369,7 +366,6 @@ static const struct ide_port_info serverworks_chipsets[] __devinitdata = { .name = DRV_NAME, .init_chipset = init_chipset_svwks, .port_ops = &svwks_port_ops, - .host_flags = IDE_HFLAGS_SVWKS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, @@ -378,7 +374,6 @@ static const struct ide_port_info serverworks_chipsets[] __devinitdata = { .name = DRV_NAME, .init_chipset = init_chipset_svwks, .port_ops = &svwks_port_ops, - .host_flags = IDE_HFLAGS_SVWKS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, @@ -387,7 +382,7 @@ static const struct ide_port_info serverworks_chipsets[] __devinitdata = { .name = DRV_NAME, .init_chipset = init_chipset_svwks, .port_ops = &svwks_port_ops, - .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE, + .host_flags = IDE_HFLAG_SINGLE, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, @@ -396,7 +391,7 @@ static const struct ide_port_info serverworks_chipsets[] __devinitdata = { .name = DRV_NAME, .init_chipset = init_chipset_svwks, .port_ops = &svwks_port_ops, - .host_flags = IDE_HFLAGS_SVWKS | IDE_HFLAG_SINGLE, + .host_flags = IDE_HFLAG_SINGLE, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c index e85d1ed29c2a..24bc884826fc 100644 --- a/drivers/ide/setup-pci.c +++ b/drivers/ide/setup-pci.c @@ -305,7 +305,6 @@ static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info * * @dev: PCI device holding interface * @d: IDE port info * @port: port number - * @irq: PCI IRQ * @hw: hw_regs_t instance corresponding to this port * * Perform the initial set up for the hardware interface structure. This @@ -316,7 +315,7 @@ static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info * */ static int ide_hw_configure(struct pci_dev *dev, const struct ide_port_info *d, - unsigned int port, int irq, hw_regs_t *hw) + unsigned int port, hw_regs_t *hw) { unsigned long ctl = 0, base = 0; @@ -344,7 +343,6 @@ static int ide_hw_configure(struct pci_dev *dev, const struct ide_port_info *d, } memset(hw, 0, sizeof(*hw)); - hw->irq = irq; hw->dev = &dev->dev; hw->chipset = d->chipset ? d->chipset : ide_pci; ide_std_init_ports(hw, base, ctl | 2); @@ -448,7 +446,6 @@ out: * ide_pci_setup_ports - configure ports/devices on PCI IDE * @dev: PCI device * @d: IDE port info - * @pciirq: IRQ line * @hw: hw_regs_t instances corresponding to this PCI IDE device * @hws: hw_regs_t pointers table to update * @@ -462,7 +459,7 @@ out: */ void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, - int pciirq, hw_regs_t *hw, hw_regs_t **hws) + hw_regs_t *hw, hw_regs_t **hws) { int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port; u8 tmp; @@ -481,7 +478,7 @@ void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, continue; /* port not enabled */ } - if (ide_hw_configure(dev, d, port, pciirq, hw + port)) + if (ide_hw_configure(dev, d, port, hw + port)) continue; *(hws + port) = hw + port; @@ -524,7 +521,7 @@ static int do_ide_setup_pci_device(struct pci_dev *dev, if (noisy) printk(KERN_INFO "%s %s: not 100%% native mode: will " "probe irqs later\n", d->name, pci_name(dev)); - pciirq = ret; + pciirq = 0; } else if (!pciirq && noisy) { printk(KERN_WARNING "%s %s: bad irq (%d): will probe later\n", d->name, pci_name(dev), pciirq); @@ -549,7 +546,7 @@ int ide_pci_init_one(struct pci_dev *dev, const struct ide_port_info *d, if (ret < 0) goto out; - ide_pci_setup_ports(dev, d, 0, &hw[0], &hws[0]); + ide_pci_setup_ports(dev, d, &hw[0], &hws[0]); host = ide_host_alloc(d, hws); if (host == NULL) { @@ -568,7 +565,11 @@ int ide_pci_init_one(struct pci_dev *dev, const struct ide_port_info *d, goto out; /* fixup IRQ */ - hw[1].irq = hw[0].irq = ret; + if (ide_pci_is_in_compatibility_mode(dev)) { + hw[0].irq = pci_get_legacy_ide_irq(dev, 0); + hw[1].irq = pci_get_legacy_ide_irq(dev, 1); + } else + hw[1].irq = hw[0].irq = ret; ret = ide_host_register(host, d, hws); if (ret) @@ -591,7 +592,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, if (ret < 0) goto out; - ide_pci_setup_ports(pdev[i], d, 0, &hw[i*2], &hws[i*2]); + ide_pci_setup_ports(pdev[i], d, &hw[i*2], &hws[i*2]); } host = ide_host_alloc(d, hws); @@ -619,7 +620,11 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2, goto out; /* fixup IRQ */ - hw[i*2 + 1].irq = hw[i*2].irq = ret; + if (ide_pci_is_in_compatibility_mode(pdev[i])) { + hw[i*2].irq = pci_get_legacy_ide_irq(pdev[i], 0); + hw[i*2 + 1].irq = pci_get_legacy_ide_irq(pdev[i], 1); + } else + hw[i*2 + 1].irq = hw[i*2].irq = ret; } ret = ide_host_register(host, d, hws); diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c index cb2b352b876b..1811ae9cd843 100644 --- a/drivers/ide/siimage.c +++ b/drivers/ide/siimage.c @@ -464,7 +464,7 @@ static void sil_sata_pre_reset(ide_drive_t *drive) * to 133 MHz clocking if the system isn't already set up to do it. */ -static unsigned int init_chipset_siimage(struct pci_dev *dev) +static int init_chipset_siimage(struct pci_dev *dev) { struct ide_host *host = pci_get_drvdata(dev); void __iomem *ioaddr = host->host_priv; diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c index 9ec1a4a4432c..afca22beaadf 100644 --- a/drivers/ide/sis5513.c +++ b/drivers/ide/sis5513.c @@ -447,7 +447,7 @@ static int __devinit sis_find_family(struct pci_dev *dev) return chipset_family; } -static unsigned int init_chipset_sis5513(struct pci_dev *dev) +static int init_chipset_sis5513(struct pci_dev *dev) { /* Make general config ops here 1/ tell IDE channels to operate in Compatibility mode only @@ -563,7 +563,7 @@ static const struct ide_port_info sis5513_chipset __devinitdata = { .name = DRV_NAME, .init_chipset = init_chipset_sis5513, .enablebits = { {0x4a, 0x02, 0x02}, {0x4a, 0x04, 0x04} }, - .host_flags = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_NO_AUTODMA, + .host_flags = IDE_HFLAG_NO_AUTODMA, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, }; diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c index 6297956507c0..dba213c51baa 100644 --- a/drivers/ide/sl82c105.c +++ b/drivers/ide/sl82c105.c @@ -271,7 +271,7 @@ static u8 sl82c105_bridge_revision(struct pci_dev *dev) * channel 0 here at least, but channel 1 has to be enabled by * firmware or arch code. We still set both to 16 bits mode. */ -static unsigned int init_chipset_sl82c105(struct pci_dev *dev) +static int init_chipset_sl82c105(struct pci_dev *dev) { u32 val; @@ -281,7 +281,7 @@ static unsigned int init_chipset_sl82c105(struct pci_dev *dev) val |= CTRL_P0EN | CTRL_P0F16 | CTRL_P1F16; pci_write_config_dword(dev, 0x40, val); - return dev->irq; + return 0; } static const struct ide_port_ops sl82c105_port_ops = { diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c index 40b4b94a4288..f55d7d6313e8 100644 --- a/drivers/ide/slc90e66.c +++ b/drivers/ide/slc90e66.c @@ -136,7 +136,6 @@ static const struct ide_port_info slc90e66_chipset __devinitdata = { .name = DRV_NAME, .enablebits = { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} }, .port_ops = &slc90e66_port_ops, - .host_flags = IDE_HFLAG_LEGACY_IRQS, .pio_mask = ATA_PIO4, .swdma_mask = ATA_SWDMA2_ONLY, .mwdma_mask = ATA_MWDMA12_ONLY, diff --git a/drivers/ide/trm290.c b/drivers/ide/trm290.c index b6a1285a4021..1c09e549c423 100644 --- a/drivers/ide/trm290.c +++ b/drivers/ide/trm290.c @@ -277,9 +277,6 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif) if (reg & 0x10) /* legacy mode */ hwif->irq = hwif->channel ? 15 : 14; - else if (!hwif->irq && hwif->mate && hwif->mate->irq) - /* sharing IRQ with mate */ - hwif->irq = hwif->mate->irq; #if 1 { diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c index 6092fe3f409d..3ff7231e4858 100644 --- a/drivers/ide/via82cxxx.c +++ b/drivers/ide/via82cxxx.c @@ -267,7 +267,7 @@ static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u) * and initialize its drive independent registers. */ -static unsigned int init_chipset_via82cxxx(struct pci_dev *dev) +static int init_chipset_via82cxxx(struct pci_dev *dev) { struct ide_host *host = pci_get_drvdata(dev); struct via82cxxx_dev *vdev = host->host_priv; @@ -443,16 +443,6 @@ static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_i if ((via_config->flags & VIA_NO_UNMASK) == 0) d.host_flags |= IDE_HFLAG_UNMASK_IRQS; -#ifdef CONFIG_PPC_CHRP - if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos) - d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS; -#endif - -#ifdef CONFIG_AMIGAONE - if (machine_is(amigaone)) - d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS; -#endif - d.udma_mask = via_config->udma_mask; vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); diff --git a/drivers/input/joystick/maplecontrol.c b/drivers/input/joystick/maplecontrol.c index e50047bfe938..77cfde571bd9 100644 --- a/drivers/input/joystick/maplecontrol.c +++ b/drivers/input/joystick/maplecontrol.c @@ -3,7 +3,7 @@ * Based on drivers/usb/iforce.c * * Copyright Yaegashi Takeshi, 2001 - * Adrian McMenamin, 2008 + * Adrian McMenamin, 2008 - 2009 */ #include <linux/kernel.h> @@ -29,7 +29,7 @@ static void dc_pad_callback(struct mapleq *mq) struct maple_device *mapledev = mq->dev; struct dc_pad *pad = maple_get_drvdata(mapledev); struct input_dev *dev = pad->dev; - unsigned char *res = mq->recvbuf; + unsigned char *res = mq->recvbuf->buf; buttons = ~le16_to_cpup((__le16 *)(res + 8)); diff --git a/drivers/input/keyboard/maple_keyb.c b/drivers/input/keyboard/maple_keyb.c index 22f17a593be7..5aa2361aef95 100644 --- a/drivers/input/keyboard/maple_keyb.c +++ b/drivers/input/keyboard/maple_keyb.c @@ -1,8 +1,8 @@ /* * SEGA Dreamcast keyboard driver * Based on drivers/usb/usbkbd.c - * Copyright YAEGASHI Takeshi, 2001 - * Porting to 2.6 Copyright Adrian McMenamin, 2007, 2008 + * Copyright (c) YAEGASHI Takeshi, 2001 + * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -33,7 +33,7 @@ static DEFINE_MUTEX(maple_keyb_mutex); #define NR_SCANCODES 256 -MODULE_AUTHOR("YAEGASHI Takeshi, Adrian McMenamin"); +MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk"); MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver"); MODULE_LICENSE("GPL"); @@ -115,7 +115,7 @@ static void dc_scan_kbd(struct dc_kbd *kbd) input_event(dev, EV_MSC, MSC_SCAN, code); input_report_key(dev, keycode, 0); } else - printk(KERN_DEBUG "maple_keyb: " + dev_dbg(&dev->dev, "Unknown key (scancode %#x) released.", code); } @@ -127,7 +127,7 @@ static void dc_scan_kbd(struct dc_kbd *kbd) input_event(dev, EV_MSC, MSC_SCAN, code); input_report_key(dev, keycode, 1); } else - printk(KERN_DEBUG "maple_keyb: " + dev_dbg(&dev->dev, "Unknown key (scancode %#x) pressed.", code); } @@ -140,7 +140,7 @@ static void dc_kbd_callback(struct mapleq *mq) { struct maple_device *mapledev = mq->dev; struct dc_kbd *kbd = maple_get_drvdata(mapledev); - unsigned long *buf = mq->recvbuf; + unsigned long *buf = (unsigned long *)(mq->recvbuf->buf); /* * We should always get the lock because the only @@ -159,22 +159,27 @@ static void dc_kbd_callback(struct mapleq *mq) static int probe_maple_kbd(struct device *dev) { - struct maple_device *mdev = to_maple_dev(dev); - struct maple_driver *mdrv = to_maple_driver(dev->driver); + struct maple_device *mdev; + struct maple_driver *mdrv; int i, error; struct dc_kbd *kbd; struct input_dev *idev; - if (!(mdev->function & MAPLE_FUNC_KEYBOARD)) - return -EINVAL; + mdev = to_maple_dev(dev); + mdrv = to_maple_driver(dev->driver); kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL); - idev = input_allocate_device(); - if (!kbd || !idev) { + if (!kbd) { error = -ENOMEM; goto fail; } + idev = input_allocate_device(); + if (!idev) { + error = -ENOMEM; + goto fail_idev_alloc; + } + kbd->dev = idev; memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode)); @@ -195,7 +200,7 @@ static int probe_maple_kbd(struct device *dev) error = input_register_device(idev); if (error) - goto fail; + goto fail_register; /* Maple polling is locked to VBLANK - which may be just 50/s */ maple_getcond_callback(mdev, dc_kbd_callback, HZ/50, @@ -207,10 +212,12 @@ static int probe_maple_kbd(struct device *dev) return error; -fail: +fail_register: + maple_set_drvdata(mdev, NULL); input_free_device(idev); +fail_idev_alloc: kfree(kbd); - maple_set_drvdata(mdev, NULL); +fail: return error; } diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c index 5c8a1bcf7ca7..e1480fb11de3 100644 --- a/drivers/input/keyboard/sh_keysc.c +++ b/drivers/input/keyboard/sh_keysc.c @@ -219,6 +219,8 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev) pdata->scan_timing, priv->iomem_base + KYCR1_OFFS); iowrite16(0, priv->iomem_base + KYOUTDR_OFFS); iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS); + + device_init_wakeup(&pdev->dev, 1); return 0; err5: free_irq(irq, pdev); @@ -253,17 +255,33 @@ static int __devexit sh_keysc_remove(struct platform_device *pdev) return 0; } +static int sh_keysc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sh_keysc_priv *priv = platform_get_drvdata(pdev); + unsigned short value; + + value = ioread16(priv->iomem_base + KYCR1_OFFS); + + if (device_may_wakeup(dev)) + value |= 0x80; + else + value &= ~0x80; -#define sh_keysc_suspend NULL -#define sh_keysc_resume NULL + iowrite16(value, priv->iomem_base + KYCR1_OFFS); + return 0; +} + +static struct dev_pm_ops sh_keysc_dev_pm_ops = { + .suspend = sh_keysc_suspend, +}; struct platform_driver sh_keysc_device_driver = { .probe = sh_keysc_probe, .remove = __devexit_p(sh_keysc_remove), - .suspend = sh_keysc_suspend, - .resume = sh_keysc_resume, .driver = { .name = "sh_keysc", + .pm = &sh_keysc_dev_pm_ops, } }; diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c index 66c755c116dc..ce98d955231a 100644 --- a/drivers/media/video/cx88/cx88-alsa.c +++ b/drivers/media/video/cx88/cx88-alsa.c @@ -803,9 +803,10 @@ static int __devinit cx88_audio_initdev(struct pci_dev *pci, return (-ENOENT); } - card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t)); - if (!card) - return (-ENOMEM); + err = snd_card_create(index[devno], id[devno], THIS_MODULE, + sizeof(snd_cx88_card_t), &card); + if (err < 0) + return err; card->private_free = snd_cx88_dev_free; diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c index 2ac738fa6a07..f132e31f6edd 100644 --- a/drivers/media/video/em28xx/em28xx-audio.c +++ b/drivers/media/video/em28xx/em28xx-audio.c @@ -448,9 +448,10 @@ static int em28xx_audio_init(struct em28xx *dev) printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus " "Rechberger\n"); - card = snd_card_new(index[devnr], "Em28xx Audio", THIS_MODULE, 0); - if (card == NULL) - return -ENOMEM; + err = snd_card_create(index[devnr], "Em28xx Audio", THIS_MODULE, 0, + &card); + if (err < 0) + return err; spin_lock_init(&adev->slock); err = snd_pcm_new(card, "Em28xx Audio", 0, 0, 1, &pcm); diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c index c750d3dd57d2..8b0b64a89874 100644 --- a/drivers/media/video/saa7134/saa7134-alsa.c +++ b/drivers/media/video/saa7134/saa7134-alsa.c @@ -990,10 +990,10 @@ static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum) if (!enable[devnum]) return -ENODEV; - card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t)); - - if (card == NULL) - return -ENOMEM; + err = snd_card_create(index[devnum], id[devnum], THIS_MODULE, + sizeof(snd_card_saa7134_t), &card); + if (err < 0) + return err; strcpy(card->driver, "SAA7134"); diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 043d50fb6ef6..729f899a5cd5 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -551,5 +551,15 @@ config MTD_PLATRAM This selection automatically selects the map_ram driver. -endmenu +config MTD_VMU + tristate "Map driver for Dreamcast VMU" + depends on MAPLE + help + This driver enables access to the Dreamcast Visual Memory Unit (VMU). + + Most Dreamcast users will want to say Y here. + To build this as a module select M here, the module will be called + vmu-flash. + +endmenu diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile index 6d9ba35caf11..26b28a7a90b5 100644 --- a/drivers/mtd/maps/Makefile +++ b/drivers/mtd/maps/Makefile @@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o obj-$(CONFIG_MTD_INTEL_VR_NOR) += intel_vr_nor.o obj-$(CONFIG_MTD_BFIN_ASYNC) += bfin-async-flash.o +obj-$(CONFIG_MTD_VMU) += vmu-flash.o diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c new file mode 100644 index 000000000000..1f73297e7776 --- /dev/null +++ b/drivers/mtd/maps/vmu-flash.c @@ -0,0 +1,832 @@ +/* vmu-flash.c + * Driver for SEGA Dreamcast Visual Memory Unit + * + * Copyright (c) Adrian McMenamin 2002 - 2009 + * Copyright (c) Paul Mundt 2001 + * + * Licensed under version 2 of the + * GNU General Public Licence + */ +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/maple.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> + +struct vmu_cache { + unsigned char *buffer; /* Cache */ + unsigned int block; /* Which block was cached */ + unsigned long jiffies_atc; /* When was it cached? */ + int valid; +}; + +struct mdev_part { + struct maple_device *mdev; + int partition; +}; + +struct vmupart { + u16 user_blocks; + u16 root_block; + u16 numblocks; + char *name; + struct vmu_cache *pcache; +}; + +struct memcard { + u16 tempA; + u16 tempB; + u32 partitions; + u32 blocklen; + u32 writecnt; + u32 readcnt; + u32 removeable; + int partition; + int read; + unsigned char *blockread; + struct vmupart *parts; + struct mtd_info *mtd; +}; + +struct vmu_block { + unsigned int num; /* block number */ + unsigned int ofs; /* block offset */ +}; + +static struct vmu_block *ofs_to_block(unsigned long src_ofs, + struct mtd_info *mtd, int partition) +{ + struct vmu_block *vblock; + struct maple_device *mdev; + struct memcard *card; + struct mdev_part *mpart; + int num; + + mpart = mtd->priv; + mdev = mpart->mdev; + card = maple_get_drvdata(mdev); + + if (src_ofs >= card->parts[partition].numblocks * card->blocklen) + goto failed; + + num = src_ofs / card->blocklen; + if (num > card->parts[partition].numblocks) + goto failed; + + vblock = kmalloc(sizeof(struct vmu_block), GFP_KERNEL); + if (!vblock) + goto failed; + + vblock->num = num; + vblock->ofs = src_ofs % card->blocklen; + return vblock; + +failed: + return NULL; +} + +/* Maple bus callback function for reads */ +static void vmu_blockread(struct mapleq *mq) +{ + struct maple_device *mdev; + struct memcard *card; + + mdev = mq->dev; + card = maple_get_drvdata(mdev); + /* copy the read in data */ + + if (unlikely(!card->blockread)) + return; + + memcpy(card->blockread, mq->recvbuf->buf + 12, + card->blocklen/card->readcnt); + +} + +/* Interface with maple bus to read blocks + * caching the results so that other parts + * of the driver can access block reads */ +static int maple_vmu_read_block(unsigned int num, unsigned char *buf, + struct mtd_info *mtd) +{ + struct memcard *card; + struct mdev_part *mpart; + struct maple_device *mdev; + int partition, error = 0, x, wait; + unsigned char *blockread = NULL; + struct vmu_cache *pcache; + __be32 sendbuf; + + mpart = mtd->priv; + mdev = mpart->mdev; + partition = mpart->partition; + card = maple_get_drvdata(mdev); + pcache = card->parts[partition].pcache; + pcache->valid = 0; + + /* prepare the cache for this block */ + if (!pcache->buffer) { + pcache->buffer = kmalloc(card->blocklen, GFP_KERNEL); + if (!pcache->buffer) { + dev_err(&mdev->dev, "VMU at (%d, %d) - read fails due" + " to lack of memory\n", mdev->port, + mdev->unit); + error = -ENOMEM; + goto outB; + } + } + + /* + * Reads may be phased - again the hardware spec + * supports this - though may not be any devices in + * the wild that implement it, but we will here + */ + for (x = 0; x < card->readcnt; x++) { + sendbuf = cpu_to_be32(partition << 24 | x << 16 | num); + + if (atomic_read(&mdev->busy) == 1) { + wait_event_interruptible_timeout(mdev->maple_wait, + atomic_read(&mdev->busy) == 0, HZ); + if (atomic_read(&mdev->busy) == 1) { + dev_notice(&mdev->dev, "VMU at (%d, %d)" + " is busy\n", mdev->port, mdev->unit); + error = -EAGAIN; + goto outB; + } + } + + atomic_set(&mdev->busy, 1); + blockread = kmalloc(card->blocklen/card->readcnt, GFP_KERNEL); + if (!blockread) { + error = -ENOMEM; + atomic_set(&mdev->busy, 0); + goto outB; + } + card->blockread = blockread; + + maple_getcond_callback(mdev, vmu_blockread, 0, + MAPLE_FUNC_MEMCARD); + error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD, + MAPLE_COMMAND_BREAD, 2, &sendbuf); + /* Very long timeouts seem to be needed when box is stressed */ + wait = wait_event_interruptible_timeout(mdev->maple_wait, + (atomic_read(&mdev->busy) == 0 || + atomic_read(&mdev->busy) == 2), HZ * 3); + /* + * MTD layer does not handle hotplugging well + * so have to return errors when VMU is unplugged + * in the middle of a read (busy == 2) + */ + if (error || atomic_read(&mdev->busy) == 2) { + if (atomic_read(&mdev->busy) == 2) + error = -ENXIO; + atomic_set(&mdev->busy, 0); + card->blockread = NULL; + goto outA; + } + if (wait == 0 || wait == -ERESTARTSYS) { + card->blockread = NULL; + atomic_set(&mdev->busy, 0); + error = -EIO; + list_del_init(&(mdev->mq->list)); + kfree(mdev->mq->sendbuf); + mdev->mq->sendbuf = NULL; + if (wait == -ERESTARTSYS) { + dev_warn(&mdev->dev, "VMU read on (%d, %d)" + " interrupted on block 0x%X\n", + mdev->port, mdev->unit, num); + } else + dev_notice(&mdev->dev, "VMU read on (%d, %d)" + " timed out on block 0x%X\n", + mdev->port, mdev->unit, num); + goto outA; + } + + memcpy(buf + (card->blocklen/card->readcnt) * x, blockread, + card->blocklen/card->readcnt); + + memcpy(pcache->buffer + (card->blocklen/card->readcnt) * x, + card->blockread, card->blocklen/card->readcnt); + card->blockread = NULL; + pcache->block = num; + pcache->jiffies_atc = jiffies; + pcache->valid = 1; + kfree(blockread); + } + + return error; + +outA: + kfree(blockread); +outB: + return error; +} + +/* communicate with maple bus for phased writing */ +static int maple_vmu_write_block(unsigned int num, const unsigned char *buf, + struct mtd_info *mtd) +{ + struct memcard *card; + struct mdev_part *mpart; + struct maple_device *mdev; + int partition, error, locking, x, phaselen, wait; + __be32 *sendbuf; + + mpart = mtd->priv; + mdev = mpart->mdev; + partition = mpart->partition; + card = maple_get_drvdata(mdev); + + phaselen = card->blocklen/card->writecnt; + + sendbuf = kmalloc(phaselen + 4, GFP_KERNEL); + if (!sendbuf) { + error = -ENOMEM; + goto fail_nosendbuf; + } + for (x = 0; x < card->writecnt; x++) { + sendbuf[0] = cpu_to_be32(partition << 24 | x << 16 | num); + memcpy(&sendbuf[1], buf + phaselen * x, phaselen); + /* wait until the device is not busy doing something else + * or 1 second - which ever is longer */ + if (atomic_read(&mdev->busy) == 1) { + wait_event_interruptible_timeout(mdev->maple_wait, + atomic_read(&mdev->busy) == 0, HZ); + if (atomic_read(&mdev->busy) == 1) { + error = -EBUSY; + dev_notice(&mdev->dev, "VMU write at (%d, %d)" + "failed - device is busy\n", + mdev->port, mdev->unit); + goto fail_nolock; + } + } + atomic_set(&mdev->busy, 1); + + locking = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD, + MAPLE_COMMAND_BWRITE, phaselen / 4 + 2, sendbuf); + wait = wait_event_interruptible_timeout(mdev->maple_wait, + atomic_read(&mdev->busy) == 0, HZ/10); + if (locking) { + error = -EIO; + atomic_set(&mdev->busy, 0); + goto fail_nolock; + } + if (atomic_read(&mdev->busy) == 2) { + atomic_set(&mdev->busy, 0); + } else if (wait == 0 || wait == -ERESTARTSYS) { + error = -EIO; + dev_warn(&mdev->dev, "Write at (%d, %d) of block" + " 0x%X at phase %d failed: could not" + " communicate with VMU", mdev->port, + mdev->unit, num, x); + atomic_set(&mdev->busy, 0); + kfree(mdev->mq->sendbuf); + mdev->mq->sendbuf = NULL; + list_del_init(&(mdev->mq->list)); + goto fail_nolock; + } + } + kfree(sendbuf); + + return card->blocklen; + +fail_nolock: + kfree(sendbuf); +fail_nosendbuf: + dev_err(&mdev->dev, "VMU (%d, %d): write failed\n", mdev->port, + mdev->unit); + return error; +} + +/* mtd function to simulate reading byte by byte */ +static unsigned char vmu_flash_read_char(unsigned long ofs, int *retval, + struct mtd_info *mtd) +{ + struct vmu_block *vblock; + struct memcard *card; + struct mdev_part *mpart; + struct maple_device *mdev; + unsigned char *buf, ret; + int partition, error; + + mpart = mtd->priv; + mdev = mpart->mdev; + partition = mpart->partition; + card = maple_get_drvdata(mdev); + *retval = 0; + + buf = kmalloc(card->blocklen, GFP_KERNEL); + if (!buf) { + *retval = 1; + ret = -ENOMEM; + goto finish; + } + + vblock = ofs_to_block(ofs, mtd, partition); + if (!vblock) { + *retval = 3; + ret = -ENOMEM; + goto out_buf; + } + + error = maple_vmu_read_block(vblock->num, buf, mtd); + if (error) { + ret = error; + *retval = 2; + goto out_vblock; + } + + ret = buf[vblock->ofs]; + +out_vblock: + kfree(vblock); +out_buf: + kfree(buf); +finish: + return ret; +} + +/* mtd higher order function to read flash */ +static int vmu_flash_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, u_char *buf) +{ + struct maple_device *mdev; + struct memcard *card; + struct mdev_part *mpart; + struct vmu_cache *pcache; + struct vmu_block *vblock; + int index = 0, retval, partition, leftover, numblocks; + unsigned char cx; + + if (len < 1) + return -EIO; + + mpart = mtd->priv; + mdev = mpart->mdev; + partition = mpart->partition; + card = maple_get_drvdata(mdev); + + numblocks = card->parts[partition].numblocks; + if (from + len > numblocks * card->blocklen) + len = numblocks * card->blocklen - from; + if (len == 0) + return -EIO; + /* Have we cached this bit already? */ + pcache = card->parts[partition].pcache; + do { + vblock = ofs_to_block(from + index, mtd, partition); + if (!vblock) + return -ENOMEM; + /* Have we cached this and is the cache valid and timely? */ + if (pcache->valid && + time_before(jiffies, pcache->jiffies_atc + HZ) && + (pcache->block == vblock->num)) { + /* we have cached it, so do necessary copying */ + leftover = card->blocklen - vblock->ofs; + if (vblock->ofs + len - index < card->blocklen) { + /* only a bit of this block to copy */ + memcpy(buf + index, + pcache->buffer + vblock->ofs, + len - index); + index = len; + } else { + /* otherwise copy remainder of whole block */ + memcpy(buf + index, pcache->buffer + + vblock->ofs, leftover); + index += leftover; + } + } else { + /* + * Not cached so read one byte - + * but cache the rest of the block + */ + cx = vmu_flash_read_char(from + index, &retval, mtd); + if (retval) { + *retlen = index; + kfree(vblock); + return cx; + } + memset(buf + index, cx, 1); + index++; + } + kfree(vblock); + } while (len > index); + *retlen = index; + + return 0; +} + +static int vmu_flash_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct maple_device *mdev; + struct memcard *card; + struct mdev_part *mpart; + int index = 0, partition, error = 0, numblocks; + struct vmu_cache *pcache; + struct vmu_block *vblock; + unsigned char *buffer; + + mpart = mtd->priv; + mdev = mpart->mdev; + partition = mpart->partition; + card = maple_get_drvdata(mdev); + + /* simple sanity checks */ + if (len < 1) { + error = -EIO; + goto failed; + } + numblocks = card->parts[partition].numblocks; + if (to + len > numblocks * card->blocklen) + len = numblocks * card->blocklen - to; + if (len == 0) { + error = -EIO; + goto failed; + } + + vblock = ofs_to_block(to, mtd, partition); + if (!vblock) { + error = -ENOMEM; + goto failed; + } + + buffer = kmalloc(card->blocklen, GFP_KERNEL); + if (!buffer) { + error = -ENOMEM; + goto fail_buffer; + } + + do { + /* Read in the block we are to write to */ + error = maple_vmu_read_block(vblock->num, buffer, mtd); + if (error) + goto fail_io; + + do { + buffer[vblock->ofs] = buf[index]; + vblock->ofs++; + index++; + if (index >= len) + break; + } while (vblock->ofs < card->blocklen); + + /* write out new buffer */ + error = maple_vmu_write_block(vblock->num, buffer, mtd); + /* invalidate the cache */ + pcache = card->parts[partition].pcache; + pcache->valid = 0; + + if (error != card->blocklen) + goto fail_io; + + vblock->num++; + vblock->ofs = 0; + } while (len > index); + + kfree(buffer); + *retlen = index; + kfree(vblock); + return 0; + +fail_io: + kfree(buffer); +fail_buffer: + kfree(vblock); +failed: + dev_err(&mdev->dev, "VMU write failing with error %d\n", error); + return error; +} + +static void vmu_flash_sync(struct mtd_info *mtd) +{ + /* Do nothing here */ +} + +/* Maple bus callback function to recursively query hardware details */ +static void vmu_queryblocks(struct mapleq *mq) +{ + struct maple_device *mdev; + unsigned short *res; + struct memcard *card; + __be32 partnum; + struct vmu_cache *pcache; + struct mdev_part *mpart; + struct mtd_info *mtd_cur; + struct vmupart *part_cur; + int error; + + mdev = mq->dev; + card = maple_get_drvdata(mdev); + res = (unsigned short *) (mq->recvbuf->buf); + card->tempA = res[12]; + card->tempB = res[6]; + + dev_info(&mdev->dev, "VMU device at partition %d has %d user " + "blocks with a root block at %d\n", card->partition, + card->tempA, card->tempB); + + part_cur = &card->parts[card->partition]; + part_cur->user_blocks = card->tempA; + part_cur->root_block = card->tempB; + part_cur->numblocks = card->tempB + 1; + part_cur->name = kmalloc(12, GFP_KERNEL); + if (!part_cur->name) + goto fail_name; + + sprintf(part_cur->name, "vmu%d.%d.%d", + mdev->port, mdev->unit, card->partition); + mtd_cur = &card->mtd[card->partition]; + mtd_cur->name = part_cur->name; + mtd_cur->type = 8; + mtd_cur->flags = MTD_WRITEABLE|MTD_NO_ERASE; + mtd_cur->size = part_cur->numblocks * card->blocklen; + mtd_cur->erasesize = card->blocklen; + mtd_cur->write = vmu_flash_write; + mtd_cur->read = vmu_flash_read; + mtd_cur->sync = vmu_flash_sync; + mtd_cur->writesize = card->blocklen; + + mpart = kmalloc(sizeof(struct mdev_part), GFP_KERNEL); + if (!mpart) + goto fail_mpart; + + mpart->mdev = mdev; + mpart->partition = card->partition; + mtd_cur->priv = mpart; + mtd_cur->owner = THIS_MODULE; + + pcache = kzalloc(sizeof(struct vmu_cache), GFP_KERNEL); + if (!pcache) + goto fail_cache_create; + part_cur->pcache = pcache; + + error = add_mtd_device(mtd_cur); + if (error) + goto fail_mtd_register; + + maple_getcond_callback(mdev, NULL, 0, + MAPLE_FUNC_MEMCARD); + + /* + * Set up a recursive call to the (probably theoretical) + * second or more partition + */ + if (++card->partition < card->partitions) { + partnum = cpu_to_be32(card->partition << 24); + maple_getcond_callback(mdev, vmu_queryblocks, 0, + MAPLE_FUNC_MEMCARD); + maple_add_packet(mdev, MAPLE_FUNC_MEMCARD, + MAPLE_COMMAND_GETMINFO, 2, &partnum); + } + return; + +fail_mtd_register: + dev_err(&mdev->dev, "Could not register maple device at (%d, %d)" + "error is 0x%X\n", mdev->port, mdev->unit, error); + for (error = 0; error <= card->partition; error++) { + kfree(((card->parts)[error]).pcache); + ((card->parts)[error]).pcache = NULL; + } +fail_cache_create: +fail_mpart: + for (error = 0; error <= card->partition; error++) { + kfree(((card->mtd)[error]).priv); + ((card->mtd)[error]).priv = NULL; + } + maple_getcond_callback(mdev, NULL, 0, + MAPLE_FUNC_MEMCARD); + kfree(part_cur->name); +fail_name: + return; +} + +/* Handles very basic info about the flash, queries for details */ +static int __devinit vmu_connect(struct maple_device *mdev) +{ + unsigned long test_flash_data, basic_flash_data; + int c, error; + struct memcard *card; + u32 partnum = 0; + + test_flash_data = be32_to_cpu(mdev->devinfo.function); + /* Need to count how many bits are set - to find out which + * function_data element has details of the memory card: + * using Brian Kernighan's/Peter Wegner's method */ + for (c = 0; test_flash_data; c++) + test_flash_data &= test_flash_data - 1; + + basic_flash_data = be32_to_cpu(mdev->devinfo.function_data[c - 1]); + + card = kmalloc(sizeof(struct memcard), GFP_KERNEL); + if (!card) { + error = ENOMEM; + goto fail_nomem; + } + + card->partitions = (basic_flash_data >> 24 & 0xFF) + 1; + card->blocklen = ((basic_flash_data >> 16 & 0xFF) + 1) << 5; + card->writecnt = basic_flash_data >> 12 & 0xF; + card->readcnt = basic_flash_data >> 8 & 0xF; + card->removeable = basic_flash_data >> 7 & 1; + + card->partition = 0; + + /* + * Not sure there are actually any multi-partition devices in the + * real world, but the hardware supports them, so, so will we + */ + card->parts = kmalloc(sizeof(struct vmupart) * card->partitions, + GFP_KERNEL); + if (!card->parts) { + error = -ENOMEM; + goto fail_partitions; + } + + card->mtd = kmalloc(sizeof(struct mtd_info) * card->partitions, + GFP_KERNEL); + if (!card->mtd) { + error = -ENOMEM; + goto fail_mtd_info; + } + + maple_set_drvdata(mdev, card); + + /* + * We want to trap meminfo not get cond + * so set interval to zero, but rely on maple bus + * driver to pass back the results of the meminfo + */ + maple_getcond_callback(mdev, vmu_queryblocks, 0, + MAPLE_FUNC_MEMCARD); + + /* Make sure we are clear to go */ + if (atomic_read(&mdev->busy) == 1) { + wait_event_interruptible_timeout(mdev->maple_wait, + atomic_read(&mdev->busy) == 0, HZ); + if (atomic_read(&mdev->busy) == 1) { + dev_notice(&mdev->dev, "VMU at (%d, %d) is busy\n", + mdev->port, mdev->unit); + error = -EAGAIN; + goto fail_device_busy; + } + } + + atomic_set(&mdev->busy, 1); + + /* + * Set up the minfo call: vmu_queryblocks will handle + * the information passed back + */ + error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD, + MAPLE_COMMAND_GETMINFO, 2, &partnum); + if (error) { + dev_err(&mdev->dev, "Could not lock VMU at (%d, %d)" + " error is 0x%X\n", mdev->port, mdev->unit, error); + goto fail_mtd_info; + } + return 0; + +fail_device_busy: + kfree(card->mtd); +fail_mtd_info: + kfree(card->parts); +fail_partitions: + kfree(card); +fail_nomem: + return error; +} + +static void __devexit vmu_disconnect(struct maple_device *mdev) +{ + struct memcard *card; + struct mdev_part *mpart; + int x; + + mdev->callback = NULL; + card = maple_get_drvdata(mdev); + for (x = 0; x < card->partitions; x++) { + mpart = ((card->mtd)[x]).priv; + mpart->mdev = NULL; + del_mtd_device(&((card->mtd)[x])); + kfree(((card->parts)[x]).name); + } + kfree(card->parts); + kfree(card->mtd); + kfree(card); +} + +/* Callback to handle eccentricities of both mtd subsystem + * and general flakyness of Dreamcast VMUs + */ +static int vmu_can_unload(struct maple_device *mdev) +{ + struct memcard *card; + int x; + struct mtd_info *mtd; + + card = maple_get_drvdata(mdev); + for (x = 0; x < card->partitions; x++) { + mtd = &((card->mtd)[x]); + if (mtd->usecount > 0) + return 0; + } + return 1; +} + +#define ERRSTR "VMU at (%d, %d) file error -" + +static void vmu_file_error(struct maple_device *mdev, void *recvbuf) +{ + enum maple_file_errors error = ((int *)recvbuf)[1]; + + switch (error) { + + case MAPLE_FILEERR_INVALID_PARTITION: + dev_notice(&mdev->dev, ERRSTR " invalid partition number\n", + mdev->port, mdev->unit); + break; + + case MAPLE_FILEERR_PHASE_ERROR: + dev_notice(&mdev->dev, ERRSTR " phase error\n", + mdev->port, mdev->unit); + break; + + case MAPLE_FILEERR_INVALID_BLOCK: + dev_notice(&mdev->dev, ERRSTR " invalid block number\n", + mdev->port, mdev->unit); + break; + + case MAPLE_FILEERR_WRITE_ERROR: + dev_notice(&mdev->dev, ERRSTR " write error\n", + mdev->port, mdev->unit); + break; + + case MAPLE_FILEERR_INVALID_WRITE_LENGTH: + dev_notice(&mdev->dev, ERRSTR " invalid write length\n", + mdev->port, mdev->unit); + break; + + case MAPLE_FILEERR_BAD_CRC: + dev_notice(&mdev->dev, ERRSTR " bad CRC\n", + mdev->port, mdev->unit); + break; + + default: + dev_notice(&mdev->dev, ERRSTR " 0x%X\n", + mdev->port, mdev->unit, error); + } +} + + +static int __devinit probe_maple_vmu(struct device *dev) +{ + int error; + struct maple_device *mdev = to_maple_dev(dev); + struct maple_driver *mdrv = to_maple_driver(dev->driver); + + mdev->can_unload = vmu_can_unload; + mdev->fileerr_handler = vmu_file_error; + mdev->driver = mdrv; + + error = vmu_connect(mdev); + if (error) + return error; + + return 0; +} + +static int __devexit remove_maple_vmu(struct device *dev) +{ + struct maple_device *mdev = to_maple_dev(dev); + + vmu_disconnect(mdev); + return 0; +} + +static struct maple_driver vmu_flash_driver = { + .function = MAPLE_FUNC_MEMCARD, + .drv = { + .name = "Dreamcast_visual_memory", + .probe = probe_maple_vmu, + .remove = __devexit_p(remove_maple_vmu), + }, +}; + +static int __init vmu_flash_map_init(void) +{ + return maple_driver_register(&vmu_flash_driver); +} + +static void __exit vmu_flash_map_exit(void) +{ + maple_driver_unregister(&vmu_flash_driver); +} + +module_init(vmu_flash_map_init); +module_exit(vmu_flash_map_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Adrian McMenamin"); +MODULE_DESCRIPTION("Flash mapping for Sega Dreamcast visual memory"); diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index 1c3fc6b428e9..4898f7fe8518 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -28,7 +28,7 @@ #include <asm/rtc.h> #define DRV_NAME "sh-rtc" -#define DRV_VERSION "0.2.0" +#define DRV_VERSION "0.2.1" #define RTC_REG(r) ((r) * rtc_reg_size) @@ -99,56 +99,51 @@ struct sh_rtc { unsigned short periodic_freq; }; -static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id) +static int __sh_rtc_interrupt(struct sh_rtc *rtc) { - struct sh_rtc *rtc = dev_id; - unsigned int tmp; - - spin_lock(&rtc->lock); + unsigned int tmp, pending; tmp = readb(rtc->regbase + RCR1); + pending = tmp & RCR1_CF; tmp &= ~RCR1_CF; writeb(tmp, rtc->regbase + RCR1); /* Users have requested One x Second IRQ */ - if (rtc->periodic_freq & PF_OXS) + if (pending && rtc->periodic_freq & PF_OXS) rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF); - spin_unlock(&rtc->lock); - - return IRQ_HANDLED; + return pending; } -static irqreturn_t sh_rtc_alarm(int irq, void *dev_id) +static int __sh_rtc_alarm(struct sh_rtc *rtc) { - struct sh_rtc *rtc = dev_id; - unsigned int tmp; - - spin_lock(&rtc->lock); + unsigned int tmp, pending; tmp = readb(rtc->regbase + RCR1); + pending = tmp & RCR1_AF; tmp &= ~(RCR1_AF | RCR1_AIE); - writeb(tmp, rtc->regbase + RCR1); - - rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); + writeb(tmp, rtc->regbase + RCR1); - spin_unlock(&rtc->lock); + if (pending) + rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); - return IRQ_HANDLED; + return pending; } -static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) +static int __sh_rtc_periodic(struct sh_rtc *rtc) { - struct sh_rtc *rtc = dev_id; struct rtc_device *rtc_dev = rtc->rtc_dev; - unsigned int tmp; - - spin_lock(&rtc->lock); + struct rtc_task *irq_task; + unsigned int tmp, pending; tmp = readb(rtc->regbase + RCR2); + pending = tmp & RCR2_PEF; tmp &= ~RCR2_PEF; writeb(tmp, rtc->regbase + RCR2); + if (!pending) + return 0; + /* Half period enabled than one skipped and the next notified */ if ((rtc->periodic_freq & PF_HP) && (rtc->periodic_freq & PF_COUNT)) rtc->periodic_freq &= ~PF_COUNT; @@ -157,16 +152,65 @@ static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) rtc->periodic_freq |= PF_COUNT; if (rtc->periodic_freq & PF_KOU) { spin_lock(&rtc_dev->irq_task_lock); - if (rtc_dev->irq_task) - rtc_dev->irq_task->func(rtc_dev->irq_task->private_data); + irq_task = rtc_dev->irq_task; + if (irq_task) + irq_task->func(irq_task->private_data); spin_unlock(&rtc_dev->irq_task_lock); } else rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF); } + return pending; +} + +static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id) +{ + struct sh_rtc *rtc = dev_id; + int ret; + + spin_lock(&rtc->lock); + ret = __sh_rtc_interrupt(rtc); + spin_unlock(&rtc->lock); + + return IRQ_RETVAL(ret); +} + +static irqreturn_t sh_rtc_alarm(int irq, void *dev_id) +{ + struct sh_rtc *rtc = dev_id; + int ret; + + spin_lock(&rtc->lock); + ret = __sh_rtc_alarm(rtc); + spin_unlock(&rtc->lock); + + return IRQ_RETVAL(ret); +} + +static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) +{ + struct sh_rtc *rtc = dev_id; + int ret; + + spin_lock(&rtc->lock); + ret = __sh_rtc_periodic(rtc); spin_unlock(&rtc->lock); - return IRQ_HANDLED; + return IRQ_RETVAL(ret); +} + +static irqreturn_t sh_rtc_shared(int irq, void *dev_id) +{ + struct sh_rtc *rtc = dev_id; + int ret; + + spin_lock(&rtc->lock); + ret = __sh_rtc_interrupt(rtc); + ret |= __sh_rtc_alarm(rtc); + ret |= __sh_rtc_periodic(rtc); + spin_unlock(&rtc->lock); + + return IRQ_RETVAL(ret); } static inline void sh_rtc_setpie(struct device *dev, unsigned int enable) @@ -275,6 +319,25 @@ static int sh_rtc_proc(struct device *dev, struct seq_file *seq) return 0; } +static inline void sh_rtc_setcie(struct device *dev, unsigned int enable) +{ + struct sh_rtc *rtc = dev_get_drvdata(dev); + unsigned int tmp; + + spin_lock_irq(&rtc->lock); + + tmp = readb(rtc->regbase + RCR1); + + if (!enable) + tmp &= ~RCR1_CIE; + else + tmp |= RCR1_CIE; + + writeb(tmp, rtc->regbase + RCR1); + + spin_unlock_irq(&rtc->lock); +} + static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) { struct sh_rtc *rtc = dev_get_drvdata(dev); @@ -291,9 +354,11 @@ static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) break; case RTC_UIE_OFF: rtc->periodic_freq &= ~PF_OXS; + sh_rtc_setcie(dev, 0); break; case RTC_UIE_ON: rtc->periodic_freq |= PF_OXS; + sh_rtc_setcie(dev, 1); break; case RTC_IRQP_READ: ret = put_user(rtc->rtc_dev->irq_freq, @@ -356,18 +421,17 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) tm->tm_sec--; #endif + /* only keep the carry interrupt enabled if UIE is on */ + if (!(rtc->periodic_freq & PF_OXS)) + sh_rtc_setcie(dev, 0); + dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " "mday=%d, mon=%d, year=%d, wday=%d\n", __func__, tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday); - if (rtc_valid_tm(tm) < 0) { - dev_err(dev, "invalid date\n"); - rtc_time_to_tm(0, tm); - } - - return 0; + return rtc_valid_tm(tm); } static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) @@ -572,7 +636,7 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev) { struct sh_rtc *rtc; struct resource *res; - unsigned int tmp; + struct rtc_time r; int ret; rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL); @@ -585,26 +649,12 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev) ret = platform_get_irq(pdev, 0); if (unlikely(ret <= 0)) { ret = -ENOENT; - dev_err(&pdev->dev, "No IRQ for period\n"); + dev_err(&pdev->dev, "No IRQ resource\n"); goto err_badres; } rtc->periodic_irq = ret; - - ret = platform_get_irq(pdev, 1); - if (unlikely(ret <= 0)) { - ret = -ENOENT; - dev_err(&pdev->dev, "No IRQ for carry\n"); - goto err_badres; - } - rtc->carry_irq = ret; - - ret = platform_get_irq(pdev, 2); - if (unlikely(ret <= 0)) { - ret = -ENOENT; - dev_err(&pdev->dev, "No IRQ for alarm\n"); - goto err_badres; - } - rtc->alarm_irq = ret; + rtc->carry_irq = platform_get_irq(pdev, 1); + rtc->alarm_irq = platform_get_irq(pdev, 2); res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (unlikely(res == NULL)) { @@ -646,47 +696,66 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev) } rtc->rtc_dev->max_user_freq = 256; - rtc->rtc_dev->irq_freq = 1; - rtc->periodic_freq = 0x60; platform_set_drvdata(pdev, rtc); - /* register periodic/carry/alarm irqs */ - ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED, - "sh-rtc period", rtc); - if (unlikely(ret)) { - dev_err(&pdev->dev, - "request period IRQ failed with %d, IRQ %d\n", ret, - rtc->periodic_irq); - goto err_unmap; - } + if (rtc->carry_irq <= 0) { + /* register shared periodic/carry/alarm irq */ + ret = request_irq(rtc->periodic_irq, sh_rtc_shared, + IRQF_DISABLED, "sh-rtc", rtc); + if (unlikely(ret)) { + dev_err(&pdev->dev, + "request IRQ failed with %d, IRQ %d\n", ret, + rtc->periodic_irq); + goto err_unmap; + } + } else { + /* register periodic/carry/alarm irqs */ + ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, + IRQF_DISABLED, "sh-rtc period", rtc); + if (unlikely(ret)) { + dev_err(&pdev->dev, + "request period IRQ failed with %d, IRQ %d\n", + ret, rtc->periodic_irq); + goto err_unmap; + } - ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED, - "sh-rtc carry", rtc); - if (unlikely(ret)) { - dev_err(&pdev->dev, - "request carry IRQ failed with %d, IRQ %d\n", ret, - rtc->carry_irq); - free_irq(rtc->periodic_irq, rtc); - goto err_unmap; - } + ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, + IRQF_DISABLED, "sh-rtc carry", rtc); + if (unlikely(ret)) { + dev_err(&pdev->dev, + "request carry IRQ failed with %d, IRQ %d\n", + ret, rtc->carry_irq); + free_irq(rtc->periodic_irq, rtc); + goto err_unmap; + } - ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED, - "sh-rtc alarm", rtc); - if (unlikely(ret)) { - dev_err(&pdev->dev, - "request alarm IRQ failed with %d, IRQ %d\n", ret, - rtc->alarm_irq); - free_irq(rtc->carry_irq, rtc); - free_irq(rtc->periodic_irq, rtc); - goto err_unmap; + ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, + IRQF_DISABLED, "sh-rtc alarm", rtc); + if (unlikely(ret)) { + dev_err(&pdev->dev, + "request alarm IRQ failed with %d, IRQ %d\n", + ret, rtc->alarm_irq); + free_irq(rtc->carry_irq, rtc); + free_irq(rtc->periodic_irq, rtc); + goto err_unmap; + } } - tmp = readb(rtc->regbase + RCR1); - tmp &= ~RCR1_CF; - tmp |= RCR1_CIE; - writeb(tmp, rtc->regbase + RCR1); + /* everything disabled by default */ + rtc->periodic_freq = 0; + rtc->rtc_dev->irq_freq = 0; + sh_rtc_setpie(&pdev->dev, 0); + sh_rtc_setaie(&pdev->dev, 0); + sh_rtc_setcie(&pdev->dev, 0); + + /* reset rtc to epoch 0 if time is invalid */ + if (rtc_read_time(rtc->rtc_dev, &r) < 0) { + rtc_time_to_tm(0, &r); + rtc_set_time(rtc->rtc_dev, &r); + } + device_init_wakeup(&pdev->dev, 1); return 0; err_unmap: @@ -708,10 +777,13 @@ static int __devexit sh_rtc_remove(struct platform_device *pdev) sh_rtc_setpie(&pdev->dev, 0); sh_rtc_setaie(&pdev->dev, 0); + sh_rtc_setcie(&pdev->dev, 0); - free_irq(rtc->carry_irq, rtc); free_irq(rtc->periodic_irq, rtc); - free_irq(rtc->alarm_irq, rtc); + if (rtc->carry_irq > 0) { + free_irq(rtc->carry_irq, rtc); + free_irq(rtc->alarm_irq, rtc); + } release_resource(rtc->res); diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c index 557b54ab2f25..dbf5357a77b3 100644 --- a/drivers/serial/sh-sci.c +++ b/drivers/serial/sh-sci.c @@ -139,7 +139,7 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c) } while (!(status & SCxSR_TDxE(port))); sci_in(port, SCxSR); /* Dummy read */ - sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); + sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port)); sci_out(port, SCxTDR, c); } #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */ @@ -263,6 +263,7 @@ static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) #elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \ defined(CONFIG_CPU_SUBTYPE_SH7780) || \ defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) || \ defined(CONFIG_CPU_SUBTYPE_SHX3) static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) { @@ -284,7 +285,8 @@ static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) + defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) static inline int scif_txroom(struct uart_port *port) { return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff); @@ -1095,6 +1097,7 @@ static void serial_console_write(struct console *co, const char *s, unsigned count) { struct uart_port *port = &serial_console_port->port; + unsigned short bits; int i; for (i = 0; i < count; i++) { @@ -1103,6 +1106,11 @@ static void serial_console_write(struct console *co, const char *s, sci_poll_put_char(port, *s++); } + + /* wait until fifo is empty and last bit has been transmitted */ + bits = SCxSR_TDxE(port) | SCxSR_TEND(port); + while ((sci_in(port, SCxSR) & bits) != bits) + cpu_relax(); } static int __init serial_console_setup(struct console *co, char *options) diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h index 022e89ffec1d..d0aa82d7fce0 100644 --- a/drivers/serial/sh-sci.h +++ b/drivers/serial/sh-sci.h @@ -1,6 +1,6 @@ #include <linux/serial_core.h> #include <asm/io.h> -#include <asm/gpio.h> +#include <linux/gpio.h> #if defined(CONFIG_H83007) || defined(CONFIG_H83068) #include <asm/regs306x.h> @@ -126,7 +126,8 @@ # define SCSPTR1 0xffe10024 /* 16 bit SCIF */ # define SCIF_ORER 0x0001 /* Overrun error bit */ # define SCSCR_INIT(port) 0x3a /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7785) +#elif defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) # define SCSPTR0 0xffea0024 /* 16 bit SCIF */ # define SCSPTR1 0xffeb0024 /* 16 bit SCIF */ # define SCSPTR2 0xffec0024 /* 16 bit SCIF */ @@ -182,6 +183,7 @@ defined(CONFIG_CPU_SUBTYPE_SH7763) || \ defined(CONFIG_CPU_SUBTYPE_SH7780) || \ defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) || \ defined(CONFIG_CPU_SUBTYPE_SHX3) #define SCI_CTRL_FLAGS_REIE 0x08 /* 7750 SCIF */ #else @@ -413,7 +415,8 @@ SCIx_FNS(SCxRDR, 0x0a, 8, 0x14, 8, 0x0A, 8, 0x14, 8, 0x05, 8) SCIF_FNS(SCFCR, 0x0c, 8, 0x18, 16) #if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) + defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) SCIF_FNS(SCFDR, 0x0e, 16, 0x1C, 16) SCIF_FNS(SCTFDR, 0x0e, 16, 0x1C, 16) SCIF_FNS(SCRFDR, 0x0e, 16, 0x20, 16) @@ -644,7 +647,8 @@ static inline int sci_rxd_in(struct uart_port *port) return ctrl_inw(SCSPTR1) & 0x0001 ? 1 : 0; /* SCIF */ return 1; } -#elif defined(CONFIG_CPU_SUBTYPE_SH7785) +#elif defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) static inline int sci_rxd_in(struct uart_port *port) { if (port->mapbase == 0xffea0000) @@ -746,7 +750,8 @@ static inline int sci_rxd_in(struct uart_port *port) */ #if defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) + defined(CONFIG_CPU_SUBTYPE_SH7785) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) #define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(16*bps)-1) #elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \ defined(CONFIG_CPU_SUBTYPE_SH7720) || \ diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c index 58d24c5a76ce..2269fbcaa182 100644 --- a/drivers/sh/intc.c +++ b/drivers/sh/intc.c @@ -568,6 +568,10 @@ static void __init intc_register_irq(struct intc_desc *desc, if (!data[0] && data[1]) primary = 1; + if (!data[0] && !data[1]) + pr_warning("intc: missing unique irq mask for " + "irq %d (vect 0x%04x)\n", irq, irq2evt(irq)); + data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1); data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1); @@ -641,6 +645,17 @@ static unsigned int __init save_reg(struct intc_desc_int *d, return 0; } +static unsigned char *intc_evt2irq_table; + +unsigned int intc_evt2irq(unsigned int vector) +{ + unsigned int irq = evt2irq(vector); + + if (intc_evt2irq_table && intc_evt2irq_table[irq]) + irq = intc_evt2irq_table[irq]; + + return irq; +} void __init register_intc_controller(struct intc_desc *desc) { @@ -705,9 +720,41 @@ void __init register_intc_controller(struct intc_desc *desc) BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */ + /* keep the first vector only if same enum is used multiple times */ + for (i = 0; i < desc->nr_vectors; i++) { + struct intc_vect *vect = desc->vectors + i; + int first_irq = evt2irq(vect->vect); + + if (!vect->enum_id) + continue; + + for (k = i + 1; k < desc->nr_vectors; k++) { + struct intc_vect *vect2 = desc->vectors + k; + + if (vect->enum_id != vect2->enum_id) + continue; + + vect2->enum_id = 0; + + if (!intc_evt2irq_table) + intc_evt2irq_table = alloc_bootmem(NR_IRQS); + + if (!intc_evt2irq_table) { + pr_warning("intc: cannot allocate evt2irq!\n"); + continue; + } + + intc_evt2irq_table[evt2irq(vect2->vect)] = first_irq; + } + } + + /* register the vectors one by one */ for (i = 0; i < desc->nr_vectors; i++) { struct intc_vect *vect = desc->vectors + i; + if (!vect->enum_id) + continue; + intc_register_irq(desc, d, vect->enum_id, evt2irq(vect->vect)); } } diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c index 7e1257af3d41..cab1ab7cfb78 100644 --- a/drivers/sh/maple/maple.c +++ b/drivers/sh/maple/maple.c @@ -1,16 +1,10 @@ /* * Core maple bus functionality * - * Copyright (C) 2007, 2008 Adrian McMenamin + * Copyright (C) 2007 - 2009 Adrian McMenamin * Copyright (C) 2001 - 2008 Paul Mundt - * - * Based on 2.4 code by: - * - * Copyright (C) 2000-2001 YAEGASHI Takeshi + * Copyright (C) 2000 - 2001 YAEGASHI Takeshi * Copyright (C) 2001 M. R. Brown - * Copyright (C) 2001 Paul Mundt - * - * and others. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -32,7 +26,7 @@ #include <mach/dma.h> #include <mach/sysasic.h> -MODULE_AUTHOR("Yaegashi Takeshi, Paul Mundt, M. R. Brown, Adrian McMenamin"); +MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); MODULE_DESCRIPTION("Maple bus driver for Dreamcast"); MODULE_LICENSE("GPL v2"); MODULE_SUPPORTED_DEVICE("{{SEGA, Dreamcast/Maple}}"); @@ -49,7 +43,7 @@ static LIST_HEAD(maple_sentq); /* mutex to protect queue of waiting packets */ static DEFINE_MUTEX(maple_wlist_lock); -static struct maple_driver maple_dummy_driver; +static struct maple_driver maple_unsupported_device; static struct device maple_bus; static int subdevice_map[MAPLE_PORTS]; static unsigned long *maple_sendbuf, *maple_sendptr, *maple_lastptr; @@ -62,8 +56,9 @@ struct maple_device_specify { int unit; }; -static bool checked[4]; -static struct maple_device *baseunits[4]; +static bool checked[MAPLE_PORTS]; +static bool empty[MAPLE_PORTS]; +static struct maple_device *baseunits[MAPLE_PORTS]; /** * maple_driver_register - register a maple driver @@ -97,12 +92,20 @@ void maple_driver_unregister(struct maple_driver *drv) EXPORT_SYMBOL_GPL(maple_driver_unregister); /* set hardware registers to enable next round of dma */ -static void maplebus_dma_reset(void) +static void maple_dma_reset(void) { ctrl_outl(MAPLE_MAGIC, MAPLE_RESET); /* set trig type to 0 for software trigger, 1 for hardware (VBLANK) */ ctrl_outl(1, MAPLE_TRIGTYPE); - ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(50000), MAPLE_SPEED); + /* + * Maple system register + * bits 31 - 16 timeout in units of 20nsec + * bit 12 hard trigger - set 0 to keep responding to VBLANK + * bits 9 - 8 set 00 for 2 Mbps, 01 for 1 Mbps + * bits 3 - 0 delay (in 1.3ms) between VBLANK and start of DMA + * max delay is 11 + */ + ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(0xFFFF), MAPLE_SPEED); ctrl_outl(PHYSADDR(maple_sendbuf), MAPLE_DMAADDR); ctrl_outl(1, MAPLE_ENABLE); } @@ -134,21 +137,16 @@ static void maple_release_device(struct device *dev) { struct maple_device *mdev; struct mapleq *mq; - if (!dev) - return; + mdev = to_maple_dev(dev); mq = mdev->mq; - if (mq) { - if (mq->recvbufdcsp) - kmem_cache_free(maple_queue_cache, mq->recvbufdcsp); - kfree(mq); - mq = NULL; - } + kmem_cache_free(maple_queue_cache, mq->recvbuf); + kfree(mq); kfree(mdev); } /** - * maple_add_packet - add a single instruction to the queue + * maple_add_packet - add a single instruction to the maple bus queue * @mdev: maple device * @function: function on device being queried * @command: maple command to add @@ -158,68 +156,12 @@ static void maple_release_device(struct device *dev) int maple_add_packet(struct maple_device *mdev, u32 function, u32 command, size_t length, void *data) { - int locking, ret = 0; + int ret = 0; void *sendbuf = NULL; - mutex_lock(&maple_wlist_lock); - /* bounce if device already locked */ - locking = mutex_is_locked(&mdev->mq->mutex); - if (locking) { - ret = -EBUSY; - goto out; - } - - mutex_lock(&mdev->mq->mutex); - if (length) { - sendbuf = kmalloc(length * 4, GFP_KERNEL); + sendbuf = kzalloc(length * 4, GFP_KERNEL); if (!sendbuf) { - mutex_unlock(&mdev->mq->mutex); - ret = -ENOMEM; - goto out; - } - ((__be32 *)sendbuf)[0] = cpu_to_be32(function); - } - - mdev->mq->command = command; - mdev->mq->length = length; - if (length > 1) - memcpy(sendbuf + 4, data, (length - 1) * 4); - mdev->mq->sendbuf = sendbuf; - - list_add(&mdev->mq->list, &maple_waitq); -out: - mutex_unlock(&maple_wlist_lock); - return ret; -} -EXPORT_SYMBOL_GPL(maple_add_packet); - -/** - * maple_add_packet_sleeps - add a single instruction to the queue - * @mdev: maple device - * @function: function on device being queried - * @command: maple command to add - * @length: length of command string (in 32 bit words) - * @data: remainder of command string - * - * Same as maple_add_packet(), but waits for the lock to become free. - */ -int maple_add_packet_sleeps(struct maple_device *mdev, u32 function, - u32 command, size_t length, void *data) -{ - int locking, ret = 0; - void *sendbuf = NULL; - - locking = mutex_lock_interruptible(&mdev->mq->mutex); - if (locking) { - ret = -EIO; - goto out; - } - - if (length) { - sendbuf = kmalloc(length * 4, GFP_KERNEL); - if (!sendbuf) { - mutex_unlock(&mdev->mq->mutex); ret = -ENOMEM; goto out; } @@ -233,38 +175,35 @@ int maple_add_packet_sleeps(struct maple_device *mdev, u32 function, mdev->mq->sendbuf = sendbuf; mutex_lock(&maple_wlist_lock); - list_add(&mdev->mq->list, &maple_waitq); + list_add_tail(&mdev->mq->list, &maple_waitq); mutex_unlock(&maple_wlist_lock); out: return ret; } -EXPORT_SYMBOL_GPL(maple_add_packet_sleeps); +EXPORT_SYMBOL_GPL(maple_add_packet); static struct mapleq *maple_allocq(struct maple_device *mdev) { struct mapleq *mq; - mq = kmalloc(sizeof(*mq), GFP_KERNEL); + mq = kzalloc(sizeof(*mq), GFP_KERNEL); if (!mq) goto failed_nomem; + INIT_LIST_HEAD(&mq->list); mq->dev = mdev; - mq->recvbufdcsp = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL); - mq->recvbuf = (void *) P2SEGADDR(mq->recvbufdcsp); + mq->recvbuf = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL); if (!mq->recvbuf) goto failed_p2; - /* - * most devices do not need the mutex - but - * anything that injects block reads or writes - * will rely on it - */ - mutex_init(&mq->mutex); + mq->recvbuf->buf = &((mq->recvbuf->bufx)[0]); return mq; failed_p2: kfree(mq); failed_nomem: + dev_err(&mdev->dev, "could not allocate memory for device (%d, %d)\n", + mdev->port, mdev->unit); return NULL; } @@ -272,12 +211,16 @@ static struct maple_device *maple_alloc_dev(int port, int unit) { struct maple_device *mdev; + /* zero this out to avoid kobj subsystem + * thinking it has already been registered */ + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); if (!mdev) return NULL; mdev->port = port; mdev->unit = unit; + mdev->mq = maple_allocq(mdev); if (!mdev->mq) { @@ -286,19 +229,14 @@ static struct maple_device *maple_alloc_dev(int port, int unit) } mdev->dev.bus = &maple_bus_type; mdev->dev.parent = &maple_bus; + init_waitqueue_head(&mdev->maple_wait); return mdev; } static void maple_free_dev(struct maple_device *mdev) { - if (!mdev) - return; - if (mdev->mq) { - if (mdev->mq->recvbufdcsp) - kmem_cache_free(maple_queue_cache, - mdev->mq->recvbufdcsp); - kfree(mdev->mq); - } + kmem_cache_free(maple_queue_cache, mdev->mq->recvbuf); + kfree(mdev->mq); kfree(mdev); } @@ -320,7 +258,7 @@ static void maple_build_block(struct mapleq *mq) maple_lastptr = maple_sendptr; *maple_sendptr++ = (port << 16) | len | 0x80000000; - *maple_sendptr++ = PHYSADDR(mq->recvbuf); + *maple_sendptr++ = PHYSADDR(mq->recvbuf->buf); *maple_sendptr++ = mq->command | (to << 8) | (from << 16) | (len << 24); while (len-- > 0) @@ -333,20 +271,28 @@ static void maple_send(void) int i, maple_packets = 0; struct mapleq *mq, *nmq; - if (!list_empty(&maple_sentq)) + if (!maple_dma_done()) return; + + /* disable DMA */ + ctrl_outl(0, MAPLE_ENABLE); + + if (!list_empty(&maple_sentq)) + goto finish; + mutex_lock(&maple_wlist_lock); - if (list_empty(&maple_waitq) || !maple_dma_done()) { + if (list_empty(&maple_waitq)) { mutex_unlock(&maple_wlist_lock); - return; + goto finish; } - mutex_unlock(&maple_wlist_lock); + maple_lastptr = maple_sendbuf; maple_sendptr = maple_sendbuf; - mutex_lock(&maple_wlist_lock); + list_for_each_entry_safe(mq, nmq, &maple_waitq, list) { maple_build_block(mq); - list_move(&mq->list, &maple_sentq); + list_del_init(&mq->list); + list_add_tail(&mq->list, &maple_sentq); if (maple_packets++ > MAPLE_MAXPACKETS) break; } @@ -356,10 +302,13 @@ static void maple_send(void) dma_cache_sync(0, maple_sendbuf + i * PAGE_SIZE, PAGE_SIZE, DMA_BIDIRECTIONAL); } + +finish: + maple_dma_reset(); } /* check if there is a driver registered likely to match this device */ -static int check_matching_maple_driver(struct device_driver *driver, +static int maple_check_matching_driver(struct device_driver *driver, void *devptr) { struct maple_driver *maple_drv; @@ -374,10 +323,7 @@ static int check_matching_maple_driver(struct device_driver *driver, static void maple_detach_driver(struct maple_device *mdev) { - if (!mdev) - return; device_unregister(&mdev->dev); - mdev = NULL; } /* process initial MAPLE_COMMAND_DEVINFO for each device or port */ @@ -385,9 +331,9 @@ static void maple_attach_driver(struct maple_device *mdev) { char *p, *recvbuf; unsigned long function; - int matched, retval; + int matched, error; - recvbuf = mdev->mq->recvbuf; + recvbuf = mdev->mq->recvbuf->buf; /* copy the data as individual elements in * case of memory optimisation */ memcpy(&mdev->devinfo.function, recvbuf + 4, 4); @@ -395,7 +341,6 @@ static void maple_attach_driver(struct maple_device *mdev) memcpy(&mdev->devinfo.area_code, recvbuf + 20, 1); memcpy(&mdev->devinfo.connector_direction, recvbuf + 21, 1); memcpy(&mdev->devinfo.product_name[0], recvbuf + 22, 30); - memcpy(&mdev->devinfo.product_licence[0], recvbuf + 52, 60); memcpy(&mdev->devinfo.standby_power, recvbuf + 112, 2); memcpy(&mdev->devinfo.max_power, recvbuf + 114, 2); memcpy(mdev->product_name, mdev->devinfo.product_name, 30); @@ -414,43 +359,39 @@ static void maple_attach_driver(struct maple_device *mdev) else break; - printk(KERN_INFO "Maple device detected: %s\n", - mdev->product_name); - printk(KERN_INFO "Maple device: %s\n", mdev->product_licence); - function = be32_to_cpu(mdev->devinfo.function); + dev_info(&mdev->dev, "detected %s: function 0x%lX: at (%d, %d)\n", + mdev->product_name, function, mdev->port, mdev->unit); + if (function > 0x200) { /* Do this silently - as not a real device */ function = 0; - mdev->driver = &maple_dummy_driver; + mdev->driver = &maple_unsupported_device; dev_set_name(&mdev->dev, "%d:0.port", mdev->port); } else { - printk(KERN_INFO - "Maple bus at (%d, %d): Function 0x%lX\n", - mdev->port, mdev->unit, function); - matched = bus_for_each_drv(&maple_bus_type, NULL, mdev, - check_matching_maple_driver); + maple_check_matching_driver); if (matched == 0) { /* Driver does not exist yet */ - printk(KERN_INFO - "No maple driver found.\n"); - mdev->driver = &maple_dummy_driver; + dev_info(&mdev->dev, "no driver found\n"); + mdev->driver = &maple_unsupported_device; } dev_set_name(&mdev->dev, "%d:0%d.%lX", mdev->port, mdev->unit, function); } + mdev->function = function; mdev->dev.release = &maple_release_device; - retval = device_register(&mdev->dev); - if (retval) { - printk(KERN_INFO - "Maple bus: Attempt to register device" - " (%x, %x) failed.\n", - mdev->port, mdev->unit); + + atomic_set(&mdev->busy, 0); + error = device_register(&mdev->dev); + if (error) { + dev_warn(&mdev->dev, "could not register device at" + " (%d, %d), with error 0x%X\n", mdev->unit, + mdev->port, error); maple_free_dev(mdev); mdev = NULL; return; @@ -462,7 +403,7 @@ static void maple_attach_driver(struct maple_device *mdev) * port and unit then return 1 - allows identification * of which devices need to be attached or detached */ -static int detach_maple_device(struct device *device, void *portptr) +static int check_maple_device(struct device *device, void *portptr) { struct maple_device_specify *ds; struct maple_device *mdev; @@ -477,21 +418,25 @@ static int detach_maple_device(struct device *device, void *portptr) static int setup_maple_commands(struct device *device, void *ignored) { int add; - struct maple_device *maple_dev = to_maple_dev(device); - - if ((maple_dev->interval > 0) - && time_after(jiffies, maple_dev->when)) { - /* bounce if we cannot lock */ - add = maple_add_packet(maple_dev, - be32_to_cpu(maple_dev->devinfo.function), + struct maple_device *mdev = to_maple_dev(device); + if (mdev->interval > 0 && atomic_read(&mdev->busy) == 0 && + time_after(jiffies, mdev->when)) { + /* bounce if we cannot add */ + add = maple_add_packet(mdev, + be32_to_cpu(mdev->devinfo.function), MAPLE_COMMAND_GETCOND, 1, NULL); if (!add) - maple_dev->when = jiffies + maple_dev->interval; + mdev->when = jiffies + mdev->interval; } else { if (time_after(jiffies, maple_pnp_time)) - /* This will also bounce */ - maple_add_packet(maple_dev, 0, - MAPLE_COMMAND_DEVINFO, 0, NULL); + /* Ensure we don't have block reads and devinfo + * calls interfering with one another - so flag the + * device as busy */ + if (atomic_read(&mdev->busy) == 0) { + atomic_set(&mdev->busy, 1); + maple_add_packet(mdev, 0, + MAPLE_COMMAND_DEVINFO, 0, NULL); + } } return 0; } @@ -499,29 +444,50 @@ static int setup_maple_commands(struct device *device, void *ignored) /* VBLANK bottom half - implemented via workqueue */ static void maple_vblank_handler(struct work_struct *work) { - if (!list_empty(&maple_sentq) || !maple_dma_done()) + int x, locking; + struct maple_device *mdev; + + if (!maple_dma_done()) return; ctrl_outl(0, MAPLE_ENABLE); + if (!list_empty(&maple_sentq)) + goto finish; + + /* + * Set up essential commands - to fetch data and + * check devices are still present + */ bus_for_each_dev(&maple_bus_type, NULL, NULL, - setup_maple_commands); + setup_maple_commands); + + if (time_after(jiffies, maple_pnp_time)) { + /* + * Scan the empty ports - bus is flakey and may have + * mis-reported emptyness + */ + for (x = 0; x < MAPLE_PORTS; x++) { + if (checked[x] && empty[x]) { + mdev = baseunits[x]; + if (!mdev) + break; + atomic_set(&mdev->busy, 1); + locking = maple_add_packet(mdev, 0, + MAPLE_COMMAND_DEVINFO, 0, NULL); + if (!locking) + break; + } + } - if (time_after(jiffies, maple_pnp_time)) maple_pnp_time = jiffies + MAPLE_PNP_INTERVAL; - - mutex_lock(&maple_wlist_lock); - if (!list_empty(&maple_waitq) && list_empty(&maple_sentq)) { - mutex_unlock(&maple_wlist_lock); - maple_send(); - } else { - mutex_unlock(&maple_wlist_lock); } - maplebus_dma_reset(); +finish: + maple_send(); } -/* handle devices added via hotplugs - placing them on queue for DEVINFO*/ +/* handle devices added via hotplugs - placing them on queue for DEVINFO */ static void maple_map_subunits(struct maple_device *mdev, int submask) { int retval, k, devcheck; @@ -533,7 +499,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask) ds.unit = k + 1; retval = bus_for_each_dev(&maple_bus_type, NULL, &ds, - detach_maple_device); + check_maple_device); if (retval) { submask = submask >> 1; continue; @@ -543,6 +509,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask) mdev_add = maple_alloc_dev(mdev->port, k + 1); if (!mdev_add) return; + atomic_set(&mdev_add->busy, 1); maple_add_packet(mdev_add, 0, MAPLE_COMMAND_DEVINFO, 0, NULL); /* mark that we are checking sub devices */ @@ -564,27 +531,45 @@ static void maple_clean_submap(struct maple_device *mdev) } /* handle empty port or hotplug removal */ -static void maple_response_none(struct maple_device *mdev, - struct mapleq *mq) -{ - if (mdev->unit != 0) { - list_del(&mq->list); - maple_clean_submap(mdev); - printk(KERN_INFO - "Maple bus device detaching at (%d, %d)\n", - mdev->port, mdev->unit); +static void maple_response_none(struct maple_device *mdev) +{ + maple_clean_submap(mdev); + + if (likely(mdev->unit != 0)) { + /* + * Block devices play up + * and give the impression they have + * been removed even when still in place or + * trip the mtd layer when they have + * really gone - this code traps that eventuality + * and ensures we aren't overloaded with useless + * error messages + */ + if (mdev->can_unload) { + if (!mdev->can_unload(mdev)) { + atomic_set(&mdev->busy, 2); + wake_up(&mdev->maple_wait); + return; + } + } + + dev_info(&mdev->dev, "detaching device at (%d, %d)\n", + mdev->port, mdev->unit); maple_detach_driver(mdev); return; - } - if (!started || !fullscan) { - if (checked[mdev->port] == false) { - checked[mdev->port] = true; - printk(KERN_INFO "No maple devices attached" - " to port %d\n", mdev->port); + } else { + if (!started || !fullscan) { + if (checked[mdev->port] == false) { + checked[mdev->port] = true; + empty[mdev->port] = true; + dev_info(&mdev->dev, "no devices" + " to port %d\n", mdev->port); + } + return; } - return; } - maple_clean_submap(mdev); + /* Some hardware devices generate false detach messages on unit 0 */ + atomic_set(&mdev->busy, 0); } /* preprocess hotplugs or scans */ @@ -599,8 +584,11 @@ static void maple_response_devinfo(struct maple_device *mdev, } else { if (mdev->unit != 0) maple_attach_driver(mdev); + if (mdev->unit == 0) { + empty[mdev->port] = false; + maple_attach_driver(mdev); + } } - return; } if (mdev->unit == 0) { submask = recvbuf[2] & 0x1F; @@ -611,6 +599,17 @@ static void maple_response_devinfo(struct maple_device *mdev, } } +static void maple_response_fileerr(struct maple_device *mdev, void *recvbuf) +{ + if (mdev->fileerr_handler) { + mdev->fileerr_handler(mdev, recvbuf); + return; + } else + dev_warn(&mdev->dev, "device at (%d, %d) reports" + "file error 0x%X\n", mdev->port, mdev->unit, + ((int *)recvbuf)[1]); +} + static void maple_port_rescan(void) { int i; @@ -621,12 +620,6 @@ static void maple_port_rescan(void) if (checked[i] == false) { fullscan = 0; mdev = baseunits[i]; - /* - * test lock in case scan has failed - * but device is still locked - */ - if (mutex_is_locked(&mdev->mq->mutex)) - mutex_unlock(&mdev->mq->mutex); maple_add_packet(mdev, 0, MAPLE_COMMAND_DEVINFO, 0, NULL); } @@ -637,7 +630,7 @@ static void maple_port_rescan(void) static void maple_dma_handler(struct work_struct *work) { struct mapleq *mq, *nmq; - struct maple_device *dev; + struct maple_device *mdev; char *recvbuf; enum maple_code code; @@ -646,43 +639,56 @@ static void maple_dma_handler(struct work_struct *work) ctrl_outl(0, MAPLE_ENABLE); if (!list_empty(&maple_sentq)) { list_for_each_entry_safe(mq, nmq, &maple_sentq, list) { - recvbuf = mq->recvbuf; + mdev = mq->dev; + recvbuf = mq->recvbuf->buf; + dma_cache_sync(&mdev->dev, recvbuf, 0x400, + DMA_FROM_DEVICE); code = recvbuf[0]; - dev = mq->dev; kfree(mq->sendbuf); - mutex_unlock(&mq->mutex); list_del_init(&mq->list); - switch (code) { case MAPLE_RESPONSE_NONE: - maple_response_none(dev, mq); + maple_response_none(mdev); break; case MAPLE_RESPONSE_DEVINFO: - maple_response_devinfo(dev, recvbuf); + maple_response_devinfo(mdev, recvbuf); + atomic_set(&mdev->busy, 0); break; case MAPLE_RESPONSE_DATATRF: - if (dev->callback) - dev->callback(mq); + if (mdev->callback) + mdev->callback(mq); + atomic_set(&mdev->busy, 0); + wake_up(&mdev->maple_wait); break; case MAPLE_RESPONSE_FILEERR: + maple_response_fileerr(mdev, recvbuf); + atomic_set(&mdev->busy, 0); + wake_up(&mdev->maple_wait); + break; + case MAPLE_RESPONSE_AGAIN: case MAPLE_RESPONSE_BADCMD: case MAPLE_RESPONSE_BADFUNC: - printk(KERN_DEBUG - "Maple non-fatal error 0x%X\n", - code); + dev_warn(&mdev->dev, "non-fatal error" + " 0x%X at (%d, %d)\n", code, + mdev->port, mdev->unit); + atomic_set(&mdev->busy, 0); break; case MAPLE_RESPONSE_ALLINFO: - printk(KERN_DEBUG - "Maple - extended device information" - " not supported\n"); + dev_notice(&mdev->dev, "extended" + " device information request for (%d, %d)" + " but call is not supported\n", mdev->port, + mdev->unit); + atomic_set(&mdev->busy, 0); break; case MAPLE_RESPONSE_OK: + atomic_set(&mdev->busy, 0); + wake_up(&mdev->maple_wait); break; default: @@ -699,20 +705,19 @@ static void maple_dma_handler(struct work_struct *work) if (!fullscan) maple_port_rescan(); /* mark that we have been through the first scan */ - if (started == 0) - started = 1; + started = 1; } - maplebus_dma_reset(); + maple_send(); } -static irqreturn_t maplebus_dma_interrupt(int irq, void *dev_id) +static irqreturn_t maple_dma_interrupt(int irq, void *dev_id) { /* Load everything into the bottom half */ schedule_work(&maple_dma_process); return IRQ_HANDLED; } -static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id) +static irqreturn_t maple_vblank_interrupt(int irq, void *dev_id) { schedule_work(&maple_vblank_process); return IRQ_HANDLED; @@ -720,14 +725,14 @@ static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id) static int maple_set_dma_interrupt_handler(void) { - return request_irq(HW_EVENT_MAPLE_DMA, maplebus_dma_interrupt, - IRQF_SHARED, "maple bus DMA", &maple_dummy_driver); + return request_irq(HW_EVENT_MAPLE_DMA, maple_dma_interrupt, + IRQF_SHARED, "maple bus DMA", &maple_unsupported_device); } static int maple_set_vblank_interrupt_handler(void) { - return request_irq(HW_EVENT_VSYNC, maplebus_vblank_interrupt, - IRQF_SHARED, "maple bus VBLANK", &maple_dummy_driver); + return request_irq(HW_EVENT_VSYNC, maple_vblank_interrupt, + IRQF_SHARED, "maple bus VBLANK", &maple_unsupported_device); } static int maple_get_dma_buffer(void) @@ -740,7 +745,7 @@ static int maple_get_dma_buffer(void) return 0; } -static int match_maple_bus_driver(struct device *devptr, +static int maple_match_bus_driver(struct device *devptr, struct device_driver *drvptr) { struct maple_driver *maple_drv = to_maple_driver(drvptr); @@ -765,16 +770,18 @@ static void maple_bus_release(struct device *dev) { } -static struct maple_driver maple_dummy_driver = { +static struct maple_driver maple_unsupported_device = { .drv = { - .name = "maple_dummy_driver", + .name = "maple_unsupported_device", .bus = &maple_bus_type, }, }; - +/** + * maple_bus_type - core maple bus structure + */ struct bus_type maple_bus_type = { .name = "maple", - .match = match_maple_bus_driver, + .match = maple_match_bus_driver, .uevent = maple_bus_uevent, }; EXPORT_SYMBOL_GPL(maple_bus_type); @@ -788,7 +795,8 @@ static int __init maple_bus_init(void) { int retval, i; struct maple_device *mdev[MAPLE_PORTS]; - ctrl_outl(0, MAPLE_STATE); + + ctrl_outl(0, MAPLE_ENABLE); retval = device_register(&maple_bus); if (retval) @@ -798,36 +806,33 @@ static int __init maple_bus_init(void) if (retval) goto cleanup_device; - retval = driver_register(&maple_dummy_driver.drv); + retval = driver_register(&maple_unsupported_device.drv); if (retval) goto cleanup_bus; /* allocate memory for maple bus dma */ retval = maple_get_dma_buffer(); if (retval) { - printk(KERN_INFO - "Maple bus: Failed to allocate Maple DMA buffers\n"); + dev_err(&maple_bus, "failed to allocate DMA buffers\n"); goto cleanup_basic; } /* set up DMA interrupt handler */ retval = maple_set_dma_interrupt_handler(); if (retval) { - printk(KERN_INFO - "Maple bus: Failed to grab maple DMA IRQ\n"); + dev_err(&maple_bus, "bus failed to grab maple " + "DMA IRQ\n"); goto cleanup_dma; } /* set up VBLANK interrupt handler */ retval = maple_set_vblank_interrupt_handler(); if (retval) { - printk(KERN_INFO "Maple bus: Failed to grab VBLANK IRQ\n"); + dev_err(&maple_bus, "bus failed to grab VBLANK IRQ\n"); goto cleanup_irq; } - maple_queue_cache = - kmem_cache_create("maple_queue_cache", 0x400, 0, - SLAB_HWCACHE_ALIGN, NULL); + maple_queue_cache = KMEM_CACHE(maple_buffer, SLAB_HWCACHE_ALIGN); if (!maple_queue_cache) goto cleanup_bothirqs; @@ -838,23 +843,23 @@ static int __init maple_bus_init(void) /* setup maple ports */ for (i = 0; i < MAPLE_PORTS; i++) { checked[i] = false; + empty[i] = false; mdev[i] = maple_alloc_dev(i, 0); - baseunits[i] = mdev[i]; if (!mdev[i]) { while (i-- > 0) maple_free_dev(mdev[i]); goto cleanup_cache; } + baseunits[i] = mdev[i]; + atomic_set(&mdev[i]->busy, 1); maple_add_packet(mdev[i], 0, MAPLE_COMMAND_DEVINFO, 0, NULL); subdevice_map[i] = 0; } - /* setup maplebus hardware */ - maplebus_dma_reset(); - /* initial detection */ + maple_pnp_time = jiffies + HZ; + /* prepare initial queue */ maple_send(); - maple_pnp_time = jiffies; - printk(KERN_INFO "Maple bus core now registered.\n"); + dev_info(&maple_bus, "bus core now registered\n"); return 0; @@ -871,7 +876,7 @@ cleanup_dma: free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES); cleanup_basic: - driver_unregister(&maple_dummy_driver.drv); + driver_unregister(&maple_unsupported_device.drv); cleanup_bus: bus_unregister(&maple_bus_type); @@ -880,7 +885,7 @@ cleanup_device: device_unregister(&maple_bus); cleanup: - printk(KERN_INFO "Maple bus registration failed\n"); + printk(KERN_ERR "Maple bus registration failed\n"); return retval; } /* Push init to later to ensure hardware gets detected */ diff --git a/drivers/staging/go7007/snd-go7007.c b/drivers/staging/go7007/snd-go7007.c index a7de401f61ab..cd19be6c00e0 100644 --- a/drivers/staging/go7007/snd-go7007.c +++ b/drivers/staging/go7007/snd-go7007.c @@ -248,10 +248,11 @@ int go7007_snd_init(struct go7007 *go) spin_lock_init(&gosnd->lock); gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0; gosnd->capturing = 0; - gosnd->card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); - if (gosnd->card == NULL) { + ret = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, + &gosnd->card); + if (ret < 0) { kfree(gosnd); - return -ENOMEM; + return ret; } ret = snd_device_new(gosnd->card, SNDRV_DEV_LOWLEVEL, go, &go7007_snd_device_ops); diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 83babb0a1df7..c6c816b7ecb5 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -47,6 +47,7 @@ config USB_ARCH_HAS_OHCI default y if CPU_SUBTYPE_SH7720 default y if CPU_SUBTYPE_SH7721 default y if CPU_SUBTYPE_SH7763 + default y if CPU_SUBTYPE_SH7786 # more: default PCI diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c index 60d3f9e9b51f..14e09abbddfc 100644 --- a/drivers/usb/gadget/gmidi.c +++ b/drivers/usb/gadget/gmidi.c @@ -1099,10 +1099,9 @@ static int gmidi_register_card(struct gmidi_device *dev) .dev_free = gmidi_snd_free, }; - card = snd_card_new(index, id, THIS_MODULE, 0); - if (!card) { - ERROR(dev, "snd_card_new failed\n"); - err = -ENOMEM; + err = snd_card_create(index, id, THIS_MODULE, 0, &card); + if (err < 0) { + ERROR(dev, "snd_card_create failed\n"); goto fail; } dev->card = card; diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 5cf5f1eca4f4..7658589edb1c 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1049,7 +1049,8 @@ MODULE_LICENSE ("GPL"); #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \ defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_CPU_SUBTYPE_SH7763) + defined(CONFIG_CPU_SUBTYPE_SH7763) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) #include "ohci-sh.c" #define PLATFORM_DRIVER ohci_hcd_sh_driver #endif diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c index 0a0fd48a8566..53f8f1100e81 100644 --- a/drivers/video/pvr2fb.c +++ b/drivers/video/pvr2fb.c @@ -61,7 +61,7 @@ #include <mach-dreamcast/mach/sysasic.h> #endif -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA #include <linux/pagemap.h> #include <mach/dma.h> #include <asm/dma.h> @@ -188,7 +188,7 @@ static unsigned int is_blanked = 0; /* Is the screen blanked? */ static unsigned long pvr2fb_map; #endif -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA static unsigned int shdma = PVR2_CASCADE_CHAN; static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS; #endif @@ -207,7 +207,7 @@ static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id); static int pvr2_init_cable(void); static int pvr2_get_param(const struct pvr2_params *p, const char *s, int val, int size); -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, size_t count, loff_t *ppos); #endif @@ -218,7 +218,7 @@ static struct fb_ops pvr2fb_ops = { .fb_blank = pvr2fb_blank, .fb_check_var = pvr2fb_check_var, .fb_set_par = pvr2fb_set_par, -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA .fb_write = pvr2fb_write, #endif .fb_fillrect = cfb_fillrect, @@ -671,7 +671,7 @@ static int pvr2_init_cable(void) return cable_type; } -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA static ssize_t pvr2fb_write(struct fb_info *info, const char *buf, size_t count, loff_t *ppos) { @@ -743,7 +743,7 @@ out_unmap: return ret; } -#endif /* CONFIG_SH_DMA */ +#endif /* CONFIG_PVR2_DMA */ /** * pvr2fb_common_init @@ -893,7 +893,7 @@ static int __init pvr2fb_dc_init(void) return -EBUSY; } -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA if (request_dma(pvr2dma, "pvr2") != 0) { free_irq(HW_EVENT_VSYNC, 0); return -EBUSY; @@ -915,7 +915,7 @@ static void __exit pvr2fb_dc_exit(void) } free_irq(HW_EVENT_VSYNC, 0); -#ifdef CONFIG_SH_DMA +#ifdef CONFIG_PVR2_DMA free_dma(pvr2dma); #endif } diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c index 1d2636a898c5..92ea0ab44ce2 100644 --- a/drivers/video/sh_mobile_lcdcfb.c +++ b/drivers/video/sh_mobile_lcdcfb.c @@ -33,6 +33,8 @@ struct sh_mobile_lcdc_chan { struct fb_info info; dma_addr_t dma_handle; struct fb_deferred_io defio; + unsigned long frame_end; + wait_queue_head_t frame_end_wait; }; struct sh_mobile_lcdc_priv { @@ -226,7 +228,10 @@ static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info) static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data) { struct sh_mobile_lcdc_priv *priv = data; + struct sh_mobile_lcdc_chan *ch; unsigned long tmp; + int is_sub; + int k; /* acknowledge interrupt */ tmp = lcdc_read(priv, _LDINTR); @@ -234,8 +239,24 @@ static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data) tmp |= 0x000000ff ^ LDINTR_FS; /* status in low 8 */ lcdc_write(priv, _LDINTR, tmp); - /* disable clocks */ - sh_mobile_lcdc_clk_off(priv); + /* figure out if this interrupt is for main or sub lcd */ + is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0; + + /* wake up channel and disable clocks*/ + for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { + ch = &priv->ch[k]; + + if (!ch->enabled) + continue; + + if (is_sub == lcdc_chan_is_sublcd(ch)) { + ch->frame_end = 1; + wake_up(&ch->frame_end_wait); + + sh_mobile_lcdc_clk_off(priv); + } + } + return IRQ_HANDLED; } @@ -448,18 +469,27 @@ static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) struct sh_mobile_lcdc_board_cfg *board_cfg; int k; - /* tell the board code to disable the panel */ + /* clean up deferred io and ask board code to disable panel */ for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { ch = &priv->ch[k]; - board_cfg = &ch->cfg.board_cfg; - if (board_cfg->display_off) - board_cfg->display_off(board_cfg->board_data); - /* cleanup deferred io if enabled */ + /* deferred io mode: + * flush frame, and wait for frame end interrupt + * clean up deferred io and enable clock + */ if (ch->info.fbdefio) { + ch->frame_end = 0; + schedule_delayed_work(&ch->info.deferred_work, 0); + wait_event(ch->frame_end_wait, ch->frame_end); fb_deferred_io_cleanup(&ch->info); ch->info.fbdefio = NULL; + sh_mobile_lcdc_clk_on(priv); } + + board_cfg = &ch->cfg.board_cfg; + if (board_cfg->display_off) + board_cfg->display_off(board_cfg->board_data); + } /* stop the lcdc */ @@ -652,6 +682,26 @@ static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp) return 0; } +static int sh_mobile_lcdc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + + sh_mobile_lcdc_stop(platform_get_drvdata(pdev)); + return 0; +} + +static int sh_mobile_lcdc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + + return sh_mobile_lcdc_start(platform_get_drvdata(pdev)); +} + +static struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = { + .suspend = sh_mobile_lcdc_suspend, + .resume = sh_mobile_lcdc_resume, +}; + static int sh_mobile_lcdc_remove(struct platform_device *pdev); static int __init sh_mobile_lcdc_probe(struct platform_device *pdev) @@ -707,6 +757,7 @@ static int __init sh_mobile_lcdc_probe(struct platform_device *pdev) dev_err(&pdev->dev, "unsupported interface type\n"); goto err1; } + init_waitqueue_head(&priv->ch[i].frame_end_wait); switch (pdata->ch[i].chan) { case LCDC_CHAN_MAINLCD: @@ -860,6 +911,7 @@ static struct platform_driver sh_mobile_lcdc_driver = { .driver = { .name = "sh_mobile_lcdc_fb", .owner = THIS_MODULE, + .pm = &sh_mobile_lcdc_dev_pm_ops, }, .probe = sh_mobile_lcdc_probe, .remove = sh_mobile_lcdc_remove, |