diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/mtd.c')
-rw-r--r-- | drivers/net/ethernet/sfc/mtd.c | 564 |
1 files changed, 8 insertions, 556 deletions
diff --git a/drivers/net/ethernet/sfc/mtd.c b/drivers/net/ethernet/sfc/mtd.c index f5819c746e7a..8be9a69a61e1 100644 --- a/drivers/net/ethernet/sfc/mtd.c +++ b/drivers/net/ethernet/sfc/mtd.c @@ -8,167 +8,17 @@ * by the Free Software Foundation, incorporated herein by reference. */ -#include <linux/bitops.h> #include <linux/module.h> #include <linux/mtd/mtd.h> -#include <linux/delay.h> #include <linux/slab.h> #include <linux/rtnetlink.h> #include "net_driver.h" -#include "spi.h" #include "efx.h" -#include "nic.h" -#include "mcdi.h" -#include "mcdi_pcol.h" - -#define FALCON_SPI_VERIFY_BUF_LEN 16 - -struct efx_mtd_partition { - struct list_head node; - struct mtd_info mtd; - const char *dev_type_name; - const char *type_name; - char name[IFNAMSIZ + 20]; -}; - -struct falcon_mtd_partition { - struct efx_mtd_partition common; - const struct falcon_spi_device *spi; - size_t offset; -}; - -struct efx_mtd_ops { - void (*rename)(struct efx_mtd_partition *part); - int (*read)(struct mtd_info *mtd, loff_t start, size_t len, - size_t *retlen, u8 *buffer); - int (*erase)(struct mtd_info *mtd, loff_t start, size_t len); - int (*write)(struct mtd_info *mtd, loff_t start, size_t len, - size_t *retlen, const u8 *buffer); - int (*sync)(struct mtd_info *mtd); -}; #define to_efx_mtd_partition(mtd) \ container_of(mtd, struct efx_mtd_partition, mtd) -#define to_falcon_mtd_partition(mtd) \ - container_of(mtd, struct falcon_mtd_partition, common.mtd) - -static int falcon_mtd_probe(struct efx_nic *efx); -static int siena_mtd_probe(struct efx_nic *efx); - -/* SPI utilities */ - -static int -falcon_spi_slow_wait(struct falcon_mtd_partition *part, bool uninterruptible) -{ - const struct falcon_spi_device *spi = part->spi; - struct efx_nic *efx = part->common.mtd.priv; - u8 status; - int rc, i; - - /* Wait up to 4s for flash/EEPROM to finish a slow operation. */ - for (i = 0; i < 40; i++) { - __set_current_state(uninterruptible ? - TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE); - schedule_timeout(HZ / 10); - rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL, - &status, sizeof(status)); - if (rc) - return rc; - if (!(status & SPI_STATUS_NRDY)) - return 0; - if (signal_pending(current)) - return -EINTR; - } - pr_err("%s: timed out waiting for %s\n", - part->common.name, part->common.dev_type_name); - return -ETIMEDOUT; -} - -static int -falcon_spi_unlock(struct efx_nic *efx, const struct falcon_spi_device *spi) -{ - const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 | - SPI_STATUS_BP0); - u8 status; - int rc; - - rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL, - &status, sizeof(status)); - if (rc) - return rc; - - if (!(status & unlock_mask)) - return 0; /* already unlocked */ - - rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0); - if (rc) - return rc; - rc = falcon_spi_cmd(efx, spi, SPI_SST_EWSR, -1, NULL, NULL, 0); - if (rc) - return rc; - - status &= ~unlock_mask; - rc = falcon_spi_cmd(efx, spi, SPI_WRSR, -1, &status, - NULL, sizeof(status)); - if (rc) - return rc; - rc = falcon_spi_wait_write(efx, spi); - if (rc) - return rc; - - return 0; -} - -static int -falcon_spi_erase(struct falcon_mtd_partition *part, loff_t start, size_t len) -{ - const struct falcon_spi_device *spi = part->spi; - struct efx_nic *efx = part->common.mtd.priv; - unsigned pos, block_len; - u8 empty[FALCON_SPI_VERIFY_BUF_LEN]; - u8 buffer[FALCON_SPI_VERIFY_BUF_LEN]; - int rc; - - if (len != spi->erase_size) - return -EINVAL; - - if (spi->erase_command == 0) - return -EOPNOTSUPP; - - rc = falcon_spi_unlock(efx, spi); - if (rc) - return rc; - rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0); - if (rc) - return rc; - rc = falcon_spi_cmd(efx, spi, spi->erase_command, start, NULL, - NULL, 0); - if (rc) - return rc; - rc = falcon_spi_slow_wait(part, false); - - /* Verify the entire region has been wiped */ - memset(empty, 0xff, sizeof(empty)); - for (pos = 0; pos < len; pos += block_len) { - block_len = min(len - pos, sizeof(buffer)); - rc = falcon_spi_read(efx, spi, start + pos, block_len, - NULL, buffer); - if (rc) - return rc; - if (memcmp(empty, buffer, block_len)) - return -EIO; - - /* Avoid locking up the system */ - cond_resched(); - if (signal_pending(current)) - return -EINTR; - } - - return rc; -} - /* MTD interface */ static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase) @@ -176,7 +26,7 @@ static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase) struct efx_nic *efx = mtd->priv; int rc; - rc = efx->mtd_ops->erase(mtd, erase->addr, erase->len); + rc = efx->type->mtd_erase(mtd, erase->addr, erase->len); if (rc == 0) { erase->state = MTD_ERASE_DONE; } else { @@ -193,7 +43,7 @@ static void efx_mtd_sync(struct mtd_info *mtd) struct efx_nic *efx = mtd->priv; int rc; - rc = efx->mtd_ops->sync(mtd); + rc = efx->type->mtd_sync(mtd); if (rc) pr_err("%s: %s sync failed (%d)\n", part->name, part->dev_type_name, rc); @@ -213,15 +63,8 @@ static void efx_mtd_remove_partition(struct efx_mtd_partition *part) list_del(&part->node); } -static void efx_mtd_rename_partition(struct efx_mtd_partition *part) -{ - struct efx_nic *efx = part->mtd.priv; - - efx->mtd_ops->rename(part); -} - -static int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, - size_t n_parts, size_t sizeof_part) +int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, + size_t n_parts, size_t sizeof_part) { struct efx_mtd_partition *part; size_t i; @@ -236,11 +79,11 @@ static int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts, part->mtd.priv = efx; part->mtd.name = part->name; part->mtd._erase = efx_mtd_erase; - part->mtd._read = efx->mtd_ops->read; - part->mtd._write = efx->mtd_ops->write; + part->mtd._read = efx->type->mtd_read; + part->mtd._write = efx->type->mtd_write; part->mtd._sync = efx_mtd_sync; - efx_mtd_rename_partition(part); + efx->type->mtd_rename(part); if (mtd_device_register(&part->mtd, NULL, 0)) goto fail; @@ -286,396 +129,5 @@ void efx_mtd_rename(struct efx_nic *efx) ASSERT_RTNL(); list_for_each_entry(part, &efx->mtd_list, node) - efx_mtd_rename_partition(part); -} - -int efx_mtd_probe(struct efx_nic *efx) -{ - if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) - return siena_mtd_probe(efx); - else - return falcon_mtd_probe(efx); -} - -/* Implementation of MTD operations for Falcon */ - -static void falcon_mtd_rename(struct efx_mtd_partition *part) -{ - struct efx_nic *efx = part->mtd.priv; - - snprintf(part->name, sizeof(part->name), "%s %s", - efx->name, part->type_name); -} - -static int falcon_mtd_read(struct mtd_info *mtd, loff_t start, - size_t len, size_t *retlen, u8 *buffer) -{ - struct falcon_mtd_partition *part = to_falcon_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - struct falcon_nic_data *nic_data = efx->nic_data; - int rc; - - rc = mutex_lock_interruptible(&nic_data->spi_lock); - if (rc) - return rc; - rc = falcon_spi_read(efx, part->spi, part->offset + start, - len, retlen, buffer); - mutex_unlock(&nic_data->spi_lock); - return rc; -} - -static int falcon_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len) -{ - struct falcon_mtd_partition *part = to_falcon_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - struct falcon_nic_data *nic_data = efx->nic_data; - int rc; - - rc = mutex_lock_interruptible(&nic_data->spi_lock); - if (rc) - return rc; - rc = falcon_spi_erase(part, part->offset + start, len); - mutex_unlock(&nic_data->spi_lock); - return rc; -} - -static int falcon_mtd_write(struct mtd_info *mtd, loff_t start, - size_t len, size_t *retlen, const u8 *buffer) -{ - struct falcon_mtd_partition *part = to_falcon_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - struct falcon_nic_data *nic_data = efx->nic_data; - int rc; - - rc = mutex_lock_interruptible(&nic_data->spi_lock); - if (rc) - return rc; - rc = falcon_spi_write(efx, part->spi, part->offset + start, - len, retlen, buffer); - mutex_unlock(&nic_data->spi_lock); - return rc; -} - -static int falcon_mtd_sync(struct mtd_info *mtd) -{ - struct falcon_mtd_partition *part = to_falcon_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - struct falcon_nic_data *nic_data = efx->nic_data; - int rc; - - mutex_lock(&nic_data->spi_lock); - rc = falcon_spi_slow_wait(part, true); - mutex_unlock(&nic_data->spi_lock); - return rc; -} - -static const struct efx_mtd_ops falcon_mtd_ops = { - .rename = falcon_mtd_rename, - .read = falcon_mtd_read, - .erase = falcon_mtd_erase, - .write = falcon_mtd_write, - .sync = falcon_mtd_sync, -}; - -static int falcon_mtd_probe(struct efx_nic *efx) -{ - struct falcon_nic_data *nic_data = efx->nic_data; - struct falcon_mtd_partition *parts; - struct falcon_spi_device *spi; - size_t n_parts; - int rc = -ENODEV; - - ASSERT_RTNL(); - - efx->mtd_ops = &falcon_mtd_ops; - - /* Allocate space for maximum number of partitions */ - parts = kcalloc(2, sizeof(*parts), GFP_KERNEL); - n_parts = 0; - - spi = &nic_data->spi_flash; - if (falcon_spi_present(spi) && spi->size > FALCON_FLASH_BOOTCODE_START) { - parts[n_parts].spi = spi; - parts[n_parts].offset = FALCON_FLASH_BOOTCODE_START; - parts[n_parts].common.dev_type_name = "flash"; - parts[n_parts].common.type_name = "sfc_flash_bootrom"; - parts[n_parts].common.mtd.type = MTD_NORFLASH; - parts[n_parts].common.mtd.flags = MTD_CAP_NORFLASH; - parts[n_parts].common.mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START; - parts[n_parts].common.mtd.erasesize = spi->erase_size; - n_parts++; - } - - spi = &nic_data->spi_eeprom; - if (falcon_spi_present(spi) && spi->size > FALCON_EEPROM_BOOTCONFIG_START) { - parts[n_parts].spi = spi; - parts[n_parts].offset = FALCON_EEPROM_BOOTCONFIG_START; - parts[n_parts].common.dev_type_name = "EEPROM"; - parts[n_parts].common.type_name = "sfc_bootconfig"; - parts[n_parts].common.mtd.type = MTD_RAM; - parts[n_parts].common.mtd.flags = MTD_CAP_RAM; - parts[n_parts].common.mtd.size = - min(spi->size, FALCON_EEPROM_BOOTCONFIG_END) - - FALCON_EEPROM_BOOTCONFIG_START; - parts[n_parts].common.mtd.erasesize = spi->erase_size; - n_parts++; - } - - rc = efx_mtd_add(efx, &parts[0].common, n_parts, sizeof(*parts)); - if (rc) - kfree(parts); - return rc; -} - -/* Implementation of MTD operations for Siena */ - -struct efx_mcdi_mtd_partition { - struct efx_mtd_partition common; - bool updating; - u8 nvram_type; - u16 fw_subtype; -}; - -#define to_efx_mcdi_mtd_partition(mtd) \ - container_of(mtd, struct efx_mcdi_mtd_partition, common.mtd) - -static void siena_mtd_rename(struct efx_mtd_partition *part) -{ - struct efx_mcdi_mtd_partition *mcdi_part = - container_of(part, struct efx_mcdi_mtd_partition, common); - struct efx_nic *efx = part->mtd.priv; - - snprintf(part->name, sizeof(part->name), "%s %s:%02x", - efx->name, part->type_name, mcdi_part->fw_subtype); -} - -static int siena_mtd_read(struct mtd_info *mtd, loff_t start, - size_t len, size_t *retlen, u8 *buffer) -{ - struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - loff_t offset = start; - loff_t end = min_t(loff_t, start + len, mtd->size); - size_t chunk; - int rc = 0; - - while (offset < end) { - chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX); - rc = efx_mcdi_nvram_read(efx, part->nvram_type, offset, - buffer, chunk); - if (rc) - goto out; - offset += chunk; - buffer += chunk; - } -out: - *retlen = offset - start; - return rc; -} - -static int siena_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len) -{ - struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - loff_t offset = start & ~((loff_t)(mtd->erasesize - 1)); - loff_t end = min_t(loff_t, start + len, mtd->size); - size_t chunk = part->common.mtd.erasesize; - int rc = 0; - - if (!part->updating) { - rc = efx_mcdi_nvram_update_start(efx, part->nvram_type); - if (rc) - goto out; - part->updating = true; - } - - /* The MCDI interface can in fact do multiple erase blocks at once; - * but erasing may be slow, so we make multiple calls here to avoid - * tripping the MCDI RPC timeout. */ - while (offset < end) { - rc = efx_mcdi_nvram_erase(efx, part->nvram_type, offset, - chunk); - if (rc) - goto out; - offset += chunk; - } -out: - return rc; -} - -static int siena_mtd_write(struct mtd_info *mtd, loff_t start, - size_t len, size_t *retlen, const u8 *buffer) -{ - struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - loff_t offset = start; - loff_t end = min_t(loff_t, start + len, mtd->size); - size_t chunk; - int rc = 0; - - if (!part->updating) { - rc = efx_mcdi_nvram_update_start(efx, part->nvram_type); - if (rc) - goto out; - part->updating = true; - } - - while (offset < end) { - chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX); - rc = efx_mcdi_nvram_write(efx, part->nvram_type, offset, - buffer, chunk); - if (rc) - goto out; - offset += chunk; - buffer += chunk; - } -out: - *retlen = offset - start; - return rc; -} - -static int siena_mtd_sync(struct mtd_info *mtd) -{ - struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd); - struct efx_nic *efx = mtd->priv; - int rc = 0; - - if (part->updating) { - part->updating = false; - rc = efx_mcdi_nvram_update_finish(efx, part->nvram_type); - } - - return rc; + efx->type->mtd_rename(part); } - -static const struct efx_mtd_ops siena_mtd_ops = { - .rename = siena_mtd_rename, - .read = siena_mtd_read, - .erase = siena_mtd_erase, - .write = siena_mtd_write, - .sync = siena_mtd_sync, -}; - -struct siena_nvram_type_info { - int port; - const char *name; -}; - -static const struct siena_nvram_type_info siena_nvram_types[] = { - [MC_CMD_NVRAM_TYPE_DISABLED_CALLISTO] = { 0, "sfc_dummy_phy" }, - [MC_CMD_NVRAM_TYPE_MC_FW] = { 0, "sfc_mcfw" }, - [MC_CMD_NVRAM_TYPE_MC_FW_BACKUP] = { 0, "sfc_mcfw_backup" }, - [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT0] = { 0, "sfc_static_cfg" }, - [MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT1] = { 1, "sfc_static_cfg" }, - [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT0] = { 0, "sfc_dynamic_cfg" }, - [MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT1] = { 1, "sfc_dynamic_cfg" }, - [MC_CMD_NVRAM_TYPE_EXP_ROM] = { 0, "sfc_exp_rom" }, - [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT0] = { 0, "sfc_exp_rom_cfg" }, - [MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT1] = { 1, "sfc_exp_rom_cfg" }, - [MC_CMD_NVRAM_TYPE_PHY_PORT0] = { 0, "sfc_phy_fw" }, - [MC_CMD_NVRAM_TYPE_PHY_PORT1] = { 1, "sfc_phy_fw" }, - [MC_CMD_NVRAM_TYPE_FPGA] = { 0, "sfc_fpga" }, -}; - -static int siena_mtd_probe_partition(struct efx_nic *efx, - struct efx_mcdi_mtd_partition *part, - unsigned int type) -{ - const struct siena_nvram_type_info *info; - size_t size, erase_size; - bool protected; - int rc; - - if (type >= ARRAY_SIZE(siena_nvram_types) || - siena_nvram_types[type].name == NULL) - return -ENODEV; - - info = &siena_nvram_types[type]; - - if (info->port != efx_port_num(efx)) - return -ENODEV; - - rc = efx_mcdi_nvram_info(efx, type, &size, &erase_size, &protected); - if (rc) - return rc; - if (protected) - return -ENODEV; /* hide it */ - - part->nvram_type = type; - part->common.dev_type_name = "Siena NVRAM manager"; - part->common.type_name = info->name; - - part->common.mtd.type = MTD_NORFLASH; - part->common.mtd.flags = MTD_CAP_NORFLASH; - part->common.mtd.size = size; - part->common.mtd.erasesize = erase_size; - - return 0; -} - -static int siena_mtd_get_fw_subtypes(struct efx_nic *efx, - struct efx_mcdi_mtd_partition *parts, - size_t n_parts) -{ - uint16_t fw_subtype_list[ - MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM]; - size_t i; - int rc; - - rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list, NULL); - if (rc) - return rc; - - for (i = 0; i < n_parts; i++) - parts[i].fw_subtype = fw_subtype_list[parts[i].nvram_type]; - - return 0; -} - -static int siena_mtd_probe(struct efx_nic *efx) -{ - struct efx_mcdi_mtd_partition *parts; - u32 nvram_types; - unsigned int type; - size_t n_parts; - int rc; - - ASSERT_RTNL(); - - efx->mtd_ops = &siena_mtd_ops; - - rc = efx_mcdi_nvram_types(efx, &nvram_types); - if (rc) - return rc; - - parts = kcalloc(hweight32(nvram_types), sizeof(*parts), GFP_KERNEL); - if (!parts) - return -ENOMEM; - - type = 0; - n_parts = 0; - - while (nvram_types != 0) { - if (nvram_types & 1) { - rc = siena_mtd_probe_partition(efx, &parts[n_parts], - type); - if (rc == 0) - n_parts++; - else if (rc != -ENODEV) - goto fail; - } - type++; - nvram_types >>= 1; - } - - rc = siena_mtd_get_fw_subtypes(efx, parts, n_parts); - if (rc) - goto fail; - - rc = efx_mtd_add(efx, &parts[0].common, n_parts, sizeof(*parts)); -fail: - if (rc) - kfree(parts); - return rc; -} - |