diff options
Diffstat (limited to 'drivers/misc/habanalabs/sysfs.c')
| -rw-r--r-- | drivers/misc/habanalabs/sysfs.c | 539 |
1 files changed, 539 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/sysfs.c b/drivers/misc/habanalabs/sysfs.c new file mode 100644 index 000000000000..c900ab15cceb --- /dev/null +++ b/drivers/misc/habanalabs/sysfs.c @@ -0,0 +1,539 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright 2016-2019 HabanaLabs, Ltd. + * All Rights Reserved. + */ + +#include "habanalabs.h" + +#include <linux/pci.h> + +#define SET_CLK_PKT_TIMEOUT 1000000 /* 1s */ +#define SET_PWR_PKT_TIMEOUT 1000000 /* 1s */ + +long hl_get_frequency(struct hl_device *hdev, u32 pll_index, bool curr) +{ + struct armcp_packet pkt; + long result; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + if (curr) + pkt.ctl = __cpu_to_le32(ARMCP_PACKET_FREQUENCY_CURR_GET << + ARMCP_PKT_CTL_OPCODE_SHIFT); + else + pkt.ctl = __cpu_to_le32(ARMCP_PACKET_FREQUENCY_GET << + ARMCP_PKT_CTL_OPCODE_SHIFT); + pkt.pll_index = __cpu_to_le32(pll_index); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + SET_CLK_PKT_TIMEOUT, &result); + + if (rc) { + dev_err(hdev->dev, + "Failed to get frequency of PLL %d, error %d\n", + pll_index, rc); + result = rc; + } + + return result; +} + +void hl_set_frequency(struct hl_device *hdev, u32 pll_index, u64 freq) +{ + struct armcp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = __cpu_to_le32(ARMCP_PACKET_FREQUENCY_SET << + ARMCP_PKT_CTL_OPCODE_SHIFT); + pkt.pll_index = __cpu_to_le32(pll_index); + pkt.value = __cpu_to_le64(freq); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + SET_CLK_PKT_TIMEOUT, NULL); + + if (rc) + dev_err(hdev->dev, + "Failed to set frequency to PLL %d, error %d\n", + pll_index, rc); +} + +u64 hl_get_max_power(struct hl_device *hdev) +{ + struct armcp_packet pkt; + long result; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = __cpu_to_le32(ARMCP_PACKET_MAX_POWER_GET << + ARMCP_PKT_CTL_OPCODE_SHIFT); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + SET_PWR_PKT_TIMEOUT, &result); + + if (rc) { + dev_err(hdev->dev, "Failed to get max power, error %d\n", rc); + result = rc; + } + + return result; +} + +void hl_set_max_power(struct hl_device *hdev, u64 value) +{ + struct armcp_packet pkt; + int rc; + + memset(&pkt, 0, sizeof(pkt)); + + pkt.ctl = __cpu_to_le32(ARMCP_PACKET_MAX_POWER_SET << + ARMCP_PKT_CTL_OPCODE_SHIFT); + pkt.value = __cpu_to_le64(value); + + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt), + SET_PWR_PKT_TIMEOUT, NULL); + + if (rc) + dev_err(hdev->dev, "Failed to set max power, error %d\n", rc); +} + +static ssize_t pm_mng_profile_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + return sprintf(buf, "%s\n", + (hdev->pm_mng_profile == PM_AUTO) ? "auto" : + (hdev->pm_mng_profile == PM_MANUAL) ? "manual" : + "unknown"); +} + +static ssize_t pm_mng_profile_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + if (hl_device_disabled_or_in_reset(hdev)) { + count = -ENODEV; + goto out; + } + + mutex_lock(&hdev->fd_open_cnt_lock); + + if (atomic_read(&hdev->fd_open_cnt) > 0) { + dev_err(hdev->dev, + "Can't change PM profile while user process is opened on the device\n"); + count = -EPERM; + goto unlock_mutex; + } + + if (strncmp("auto", buf, strlen("auto")) == 0) { + /* Make sure we are in LOW PLL when changing modes */ + if (hdev->pm_mng_profile == PM_MANUAL) { + atomic_set(&hdev->curr_pll_profile, PLL_HIGH); + hl_device_set_frequency(hdev, PLL_LOW); + hdev->pm_mng_profile = PM_AUTO; + } + } else if (strncmp("manual", buf, strlen("manual")) == 0) { + /* Make sure we are in LOW PLL when changing modes */ + if (hdev->pm_mng_profile == PM_AUTO) { + flush_delayed_work(&hdev->work_freq); + hdev->pm_mng_profile = PM_MANUAL; + } + } else { + dev_err(hdev->dev, "value should be auto or manual\n"); + count = -EINVAL; + goto unlock_mutex; + } + +unlock_mutex: + mutex_unlock(&hdev->fd_open_cnt_lock); +out: + return count; +} + +static ssize_t high_pll_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + return sprintf(buf, "%u\n", hdev->high_pll); +} + +static ssize_t high_pll_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + long value; + int rc; + + if (hl_device_disabled_or_in_reset(hdev)) { + count = -ENODEV; + goto out; + } + + rc = kstrtoul(buf, 0, &value); + + if (rc) { + count = -EINVAL; + goto out; + } + + hdev->high_pll = value; + +out: + return count; +} + +static ssize_t uboot_ver_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", hdev->asic_prop.uboot_ver); +} + +static ssize_t armcp_kernel_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s", hdev->asic_prop.armcp_info.kernel_version); +} + +static ssize_t armcp_ver_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.armcp_version); +} + +static ssize_t cpld_ver_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "0x%08x\n", + hdev->asic_prop.armcp_info.cpld_version); +} + +static ssize_t infineon_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "0x%04x\n", + hdev->asic_prop.armcp_info.infineon_version); +} + +static ssize_t fuse_ver_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", hdev->asic_prop.armcp_info.fuse_version); +} + +static ssize_t thermal_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s", hdev->asic_prop.armcp_info.thermal_version); +} + +static ssize_t preboot_btl_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", hdev->asic_prop.preboot_ver); +} + +static ssize_t soft_reset_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + long value; + int rc; + + rc = kstrtoul(buf, 0, &value); + + if (rc) { + count = -EINVAL; + goto out; + } + + hl_device_reset(hdev, false, false); + +out: + return count; +} + +static ssize_t hard_reset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + long value; + int rc; + + rc = kstrtoul(buf, 0, &value); + + if (rc) { + count = -EINVAL; + goto out; + } + + hl_device_reset(hdev, true, false); + +out: + return count; +} + +static ssize_t device_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + char *str; + + switch (hdev->asic_type) { + case ASIC_GOYA: + str = "GOYA"; + break; + default: + dev_err(hdev->dev, "Unrecognized ASIC type %d\n", + hdev->asic_type); + return -EINVAL; + } + + return sprintf(buf, "%s\n", str); +} + +static ssize_t pci_addr_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + /* Use dummy, fixed address for simulator */ + if (!hdev->pdev) + return sprintf(buf, "0000:%02d:00.0\n", hdev->id); + + return sprintf(buf, "%04x:%02x:%02x.%x\n", + pci_domain_nr(hdev->pdev->bus), + hdev->pdev->bus->number, + PCI_SLOT(hdev->pdev->devfn), + PCI_FUNC(hdev->pdev->devfn)); +} + +static ssize_t status_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + char *str; + + if (atomic_read(&hdev->in_reset)) + str = "In reset"; + else if (hdev->disabled) + str = "Malfunction"; + else + str = "Operational"; + + return sprintf(buf, "%s\n", str); +} + +static ssize_t write_open_cnt_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", hdev->user_ctx ? 1 : 0); +} + +static ssize_t soft_reset_cnt_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", hdev->soft_reset_cnt); +} + +static ssize_t hard_reset_cnt_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", hdev->hard_reset_cnt); +} + +static ssize_t max_power_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + long val; + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + val = hl_get_max_power(hdev); + + return sprintf(buf, "%lu\n", val); +} + +static ssize_t max_power_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + unsigned long value; + int rc; + + if (hl_device_disabled_or_in_reset(hdev)) { + count = -ENODEV; + goto out; + } + + rc = kstrtoul(buf, 0, &value); + + if (rc) { + count = -EINVAL; + goto out; + } + + hdev->max_power = value; + hl_set_max_power(hdev, value); + +out: + return count; +} + +static ssize_t eeprom_read_handler(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, loff_t offset, + size_t max_size) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct hl_device *hdev = dev_get_drvdata(dev); + char *data; + int rc; + + if (!max_size) + return -EINVAL; + + data = kzalloc(max_size, GFP_KERNEL); + if (!data) + return -ENOMEM; + + rc = hdev->asic_funcs->get_eeprom_data(hdev, data, max_size); + if (rc) + goto out; + + memcpy(buf, data, max_size); + +out: + kfree(data); + + return max_size; +} + +static DEVICE_ATTR_RO(armcp_kernel_ver); +static DEVICE_ATTR_RO(armcp_ver); +static DEVICE_ATTR_RO(cpld_ver); +static DEVICE_ATTR_RO(device_type); +static DEVICE_ATTR_RO(fuse_ver); +static DEVICE_ATTR_WO(hard_reset); +static DEVICE_ATTR_RO(hard_reset_cnt); +static DEVICE_ATTR_RW(high_pll); +static DEVICE_ATTR_RO(infineon_ver); +static DEVICE_ATTR_RW(max_power); +static DEVICE_ATTR_RO(pci_addr); +static DEVICE_ATTR_RW(pm_mng_profile); +static DEVICE_ATTR_RO(preboot_btl_ver); +static DEVICE_ATTR_WO(soft_reset); +static DEVICE_ATTR_RO(soft_reset_cnt); +static DEVICE_ATTR_RO(status); +static DEVICE_ATTR_RO(thermal_ver); +static DEVICE_ATTR_RO(uboot_ver); +static DEVICE_ATTR_RO(write_open_cnt); + +static struct bin_attribute bin_attr_eeprom = { + .attr = {.name = "eeprom", .mode = (0444)}, + .size = PAGE_SIZE, + .read = eeprom_read_handler +}; + +static struct attribute *hl_dev_attrs[] = { + &dev_attr_armcp_kernel_ver.attr, + &dev_attr_armcp_ver.attr, + &dev_attr_cpld_ver.attr, + &dev_attr_device_type.attr, + &dev_attr_fuse_ver.attr, + &dev_attr_hard_reset.attr, + &dev_attr_hard_reset_cnt.attr, + &dev_attr_high_pll.attr, + &dev_attr_infineon_ver.attr, + &dev_attr_max_power.attr, + &dev_attr_pci_addr.attr, + &dev_attr_pm_mng_profile.attr, + &dev_attr_preboot_btl_ver.attr, + &dev_attr_soft_reset.attr, + &dev_attr_soft_reset_cnt.attr, + &dev_attr_status.attr, + &dev_attr_thermal_ver.attr, + &dev_attr_uboot_ver.attr, + &dev_attr_write_open_cnt.attr, + NULL, +}; + +static struct bin_attribute *hl_dev_bin_attrs[] = { + &bin_attr_eeprom, + NULL +}; + +static struct attribute_group hl_dev_attr_group = { + .attrs = hl_dev_attrs, + .bin_attrs = hl_dev_bin_attrs, +}; + +static struct attribute_group hl_dev_clks_attr_group; + +static const struct attribute_group *hl_dev_attr_groups[] = { + &hl_dev_attr_group, + &hl_dev_clks_attr_group, + NULL, +}; + +int hl_sysfs_init(struct hl_device *hdev) +{ + int rc; + + hdev->pm_mng_profile = PM_AUTO; + hdev->max_power = hdev->asic_prop.max_power_default; + + hdev->asic_funcs->add_device_attr(hdev, &hl_dev_clks_attr_group); + + rc = device_add_groups(hdev->dev, hl_dev_attr_groups); + if (rc) { + dev_err(hdev->dev, + "Failed to add groups to device, error %d\n", rc); + return rc; + } + + return 0; +} + +void hl_sysfs_fini(struct hl_device *hdev) +{ + device_remove_groups(hdev->dev, hl_dev_attr_groups); +} |