diff options
Diffstat (limited to 'drivers/net/sfc')
| -rw-r--r-- | drivers/net/sfc/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/sfc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/sfc/efx.c | 7 | ||||
| -rw-r--r-- | drivers/net/sfc/efx.h | 10 | ||||
| -rw-r--r-- | drivers/net/sfc/ethtool.c | 4 | ||||
| -rw-r--r-- | drivers/net/sfc/falcon.c | 17 | ||||
| -rw-r--r-- | drivers/net/sfc/mtd.c | 268 | ||||
| -rw-r--r-- | drivers/net/sfc/net_driver.h | 2 | ||||
| -rw-r--r-- | drivers/net/sfc/spi.h | 17 |
9 files changed, 327 insertions, 7 deletions
diff --git a/drivers/net/sfc/Kconfig b/drivers/net/sfc/Kconfig index 3be13b592b4..3e25fb38f73 100644 --- a/drivers/net/sfc/Kconfig +++ b/drivers/net/sfc/Kconfig @@ -12,3 +12,11 @@ config SFC To compile this driver as a module, choose M here. The module will be called sfc. +config SFC_MTD + bool "Solarflare Solarstorm SFC4000 flash MTD support" + depends on SFC && MTD + default y + help + This exposes the on-board flash memory as an MTD device (e.g. + /dev/mtd1). This makes it possible to upload new boot code + to the NIC. diff --git a/drivers/net/sfc/Makefile b/drivers/net/sfc/Makefile index c8f5704c8fb..e507daa4f0e 100644 --- a/drivers/net/sfc/Makefile +++ b/drivers/net/sfc/Makefile @@ -1,5 +1,6 @@ sfc-y += efx.o falcon.o tx.o rx.o falcon_xmac.o \ selftest.o ethtool.o xfp_phy.o \ mdio_10g.o tenxpress.o boards.o sfe4001.o +sfc-$(CONFIG_SFC_MTD) += mtd.o obj-$(CONFIG_SFC) += sfc.o diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c index 5b05789f0b7..f9139377989 100644 --- a/drivers/net/sfc/efx.c +++ b/drivers/net/sfc/efx.c @@ -1459,6 +1459,7 @@ static int efx_netdev_event(struct notifier_block *this, struct efx_nic *efx = netdev_priv(net_dev); strcpy(efx->name, net_dev->name); + efx_mtd_rename(efx); } return NOTIFY_DONE; @@ -1550,6 +1551,7 @@ void efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd) efx_stop_all(efx); mutex_lock(&efx->mac_lock); + mutex_lock(&efx->spi_lock); rc = falcon_xmac_get_settings(efx, ecmd); if (rc) @@ -1582,6 +1584,7 @@ int efx_reset_up(struct efx_nic *efx, struct ethtool_cmd *ecmd, bool ok) EFX_ERR(efx, "could not restore PHY settings\n"); } + mutex_unlock(&efx->spi_lock); mutex_unlock(&efx->mac_lock); if (ok) { @@ -1777,6 +1780,7 @@ static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type, memset(efx, 0, sizeof(*efx)); spin_lock_init(&efx->biu_lock); spin_lock_init(&efx->phy_lock); + mutex_init(&efx->spi_lock); INIT_WORK(&efx->reset_work, efx_reset_work); INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); efx->pci_dev = pci_dev; @@ -1911,6 +1915,8 @@ static void efx_pci_remove(struct pci_dev *pci_dev) if (!efx) return; + efx_mtd_remove(efx); + /* Mark the NIC as fini, then stop the interface */ rtnl_lock(); efx->state = STATE_FINI; @@ -2077,6 +2083,7 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev, EFX_LOG(efx, "initialisation successful\n"); + efx_mtd_probe(efx); /* allowed to fail */ return 0; fail5: diff --git a/drivers/net/sfc/efx.h b/drivers/net/sfc/efx.h index d02937b70ee..dd0d45b9e71 100644 --- a/drivers/net/sfc/efx.h +++ b/drivers/net/sfc/efx.h @@ -58,6 +58,16 @@ extern int efx_port_dummy_op_int(struct efx_nic *efx); extern void efx_port_dummy_op_void(struct efx_nic *efx); extern void efx_port_dummy_op_blink(struct efx_nic *efx, bool blink); +/* MTD */ +#ifdef CONFIG_SFC_MTD +extern int efx_mtd_probe(struct efx_nic *efx); +extern void efx_mtd_rename(struct efx_nic *efx); +extern void efx_mtd_remove(struct efx_nic *efx); +#else +static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; } +static inline void efx_mtd_rename(struct efx_nic *efx) {} +static inline void efx_mtd_remove(struct efx_nic *efx) {} +#endif extern unsigned int efx_monitor_interval; diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c index df0579e386f..abd8fcd6e62 100644 --- a/drivers/net/sfc/ethtool.c +++ b/drivers/net/sfc/ethtool.c @@ -554,8 +554,10 @@ static int efx_ethtool_get_eeprom(struct net_device *net_dev, size_t len; int rc; + mutex_lock(&efx->spi_lock); rc = falcon_spi_read(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START, eeprom->len, &len, buf); + mutex_unlock(&efx->spi_lock); eeprom->magic = EFX_ETHTOOL_EEPROM_MAGIC; eeprom->len = len; return rc; @@ -572,8 +574,10 @@ static int efx_ethtool_set_eeprom(struct net_device *net_dev, if (eeprom->magic != EFX_ETHTOOL_EEPROM_MAGIC) return -EINVAL; + mutex_lock(&efx->spi_lock); rc = falcon_spi_write(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START, eeprom->len, &len, buf); + mutex_unlock(&efx->spi_lock); eeprom->len = len; return rc; } diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c index 3f74ceff6a2..71e0bed6061 100644 --- a/drivers/net/sfc/falcon.c +++ b/drivers/net/sfc/falcon.c @@ -1628,9 +1628,9 @@ static int falcon_spi_wait(struct efx_nic *efx) } } -static int falcon_spi_cmd(const struct efx_spi_device *spi, - unsigned int command, int address, - const void *in, void *out, unsigned int len) +int falcon_spi_cmd(const struct efx_spi_device *spi, + unsigned int command, int address, + const void *in, void *out, unsigned int len) { struct efx_nic *efx = spi->efx; bool addressed = (address >= 0); @@ -1641,6 +1641,7 @@ static int falcon_spi_cmd(const struct efx_spi_device *spi, /* Input validation */ if (len > FALCON_SPI_MAX_LEN) return -EINVAL; + BUG_ON(!mutex_is_locked(&efx->spi_lock)); /* Check SPI not currently being accessed */ rc = falcon_spi_wait(efx); @@ -1699,8 +1700,7 @@ efx_spi_munge_command(const struct efx_spi_device *spi, return command | (((address >> 8) & spi->munge_address) << 3); } - -static int falcon_spi_fast_wait(const struct efx_spi_device *spi) +int falcon_spi_fast_wait(const struct efx_spi_device *spi) { u8 status; int i, rc; @@ -2259,7 +2259,9 @@ int falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out) nvconfig = region + NVCONFIG_OFFSET; spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom; + mutex_lock(&efx->spi_lock); rc = falcon_spi_read(spi, 0, FALCON_NVCONFIG_END, NULL, region); + mutex_unlock(&efx->spi_lock); if (rc) { EFX_ERR(efx, "Failed to read %s\n", efx->spi_flash ? "flash" : "EEPROM"); @@ -2555,6 +2557,11 @@ static int falcon_spi_device_init(struct efx_nic *efx, SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN); spi_device->munge_address = (spi_device->size == 1 << 9 && spi_device->addr_len == 1); + spi_device->erase_command = + SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD); + spi_device->erase_size = + 1 << SPI_DEV_TYPE_FIELD(device_type, + SPI_DEV_TYPE_ERASE_SIZE); spi_device->block_size = 1 << SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_BLOCK_SIZE); diff --git a/drivers/net/sfc/mtd.c b/drivers/net/sfc/mtd.c new file mode 100644 index 00000000000..a1e6c2875fc --- /dev/null +++ b/drivers/net/sfc/mtd.c @@ -0,0 +1,268 @@ +/**************************************************************************** + * Driver for Solarflare Solarstorm network controllers and boards + * Copyright 2005-2006 Fen Systems Ltd. + * Copyright 2006-2008 Solarflare Communications Inc. + * + * 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, incorporated herein by reference. + */ + +#include <linux/module.h> +#include <linux/mtd/mtd.h> +#include <linux/delay.h> + +#define EFX_DRIVER_NAME "sfc_mtd" +#include "net_driver.h" +#include "spi.h" + +#define EFX_SPI_VERIFY_BUF_LEN 16 + +struct efx_mtd { + const struct efx_spi_device *spi; + struct mtd_info mtd; + char name[IFNAMSIZ + 20]; +}; + +/* SPI utilities */ + +static int efx_spi_slow_wait(struct efx_mtd *efx_mtd, bool uninterruptible) +{ + const struct efx_spi_device *spi = efx_mtd->spi; + struct efx_nic *efx = spi->efx; + 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(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; + } + EFX_ERR(efx, "timed out waiting for %s\n", efx_mtd->name); + return -ETIMEDOUT; +} + +static int efx_spi_unlock(const struct efx_spi_device *spi) +{ + const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 | + SPI_STATUS_BP0); + u8 status; + int rc; + + rc = falcon_spi_cmd(spi, SPI_RDSR, -1, NULL, &status, sizeof(status)); + if (rc) + return rc; + + if (!(status & unlock_mask)) + return 0; /* already unlocked */ + + rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0); + if (rc) + return rc; + rc = falcon_spi_cmd(spi, SPI_SST_EWSR, -1, NULL, NULL, 0); + if (rc) + return rc; + + status &= ~unlock_mask; + rc = falcon_spi_cmd(spi, SPI_WRSR, -1, &status, NULL, sizeof(status)); + if (rc) + return rc; + rc = falcon_spi_fast_wait(spi); + if (rc) + return rc; + + return 0; +} + +static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len) +{ + const struct efx_spi_device *spi = efx_mtd->spi; + unsigned pos, block_len; + u8 empty[EFX_SPI_VERIFY_BUF_LEN]; + u8 buffer[EFX_SPI_VERIFY_BUF_LEN]; + int rc; + + if (len != spi->erase_size) + return -EINVAL; + + if (spi->erase_command == 0) + return -EOPNOTSUPP; + + rc = efx_spi_unlock(spi); + if (rc) + return rc; + rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0); + if (rc) + return rc; + rc = falcon_spi_cmd(spi, spi->erase_command, start, NULL, NULL, 0); + if (rc) + return rc; + rc = efx_spi_slow_wait(efx_mtd, 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(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_read(struct mtd_info *mtd, loff_t start, size_t len, + size_t *retlen, u8 *buffer) +{ + struct efx_mtd *efx_mtd = mtd->priv; + const struct efx_spi_device *spi = efx_mtd->spi; + struct efx_nic *efx = spi->efx; + int rc; + + rc = mutex_lock_interruptible(&efx->spi_lock); + if (rc) + return rc; + rc = falcon_spi_read(spi, FALCON_FLASH_BOOTCODE_START + start, + len, retlen, buffer); + mutex_unlock(&efx->spi_lock); + return rc; +} + +static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase) +{ + struct efx_mtd *efx_mtd = mtd->priv; + struct efx_nic *efx = efx_mtd->spi->efx; + int rc; + + rc = mutex_lock_interruptible(&efx->spi_lock); + if (rc) + return rc; + rc = efx_spi_erase(efx_mtd, FALCON_FLASH_BOOTCODE_START + erase->addr, + erase->len); + mutex_unlock(&efx->spi_lock); + + if (rc == 0) { + erase->state = MTD_ERASE_DONE; + } else { + erase->state = MTD_ERASE_FAILED; + erase->fail_addr = 0xffffffff; + } + mtd_erase_callback(erase); + return rc; +} + +static int efx_mtd_write(struct mtd_info *mtd, loff_t start, + size_t len, size_t *retlen, const u8 *buffer) +{ + struct efx_mtd *efx_mtd = mtd->priv; + const struct efx_spi_device *spi = efx_mtd->spi; + struct efx_nic *efx = spi->efx; + int rc; + + rc = mutex_lock_interruptible(&efx->spi_lock); + if (rc) + return rc; + rc = falcon_spi_write(spi, FALCON_FLASH_BOOTCODE_START + start, + len, retlen, buffer); + mutex_unlock(&efx->spi_lock); + return rc; +} + +static void efx_mtd_sync(struct mtd_info *mtd) +{ + struct efx_mtd *efx_mtd = mtd->priv; + struct efx_nic *efx = efx_mtd->spi->efx; + int rc; + + mutex_lock(&efx->spi_lock); + rc = efx_spi_slow_wait(efx_mtd, true); + mutex_unlock(&efx->spi_lock); + + if (rc) + EFX_ERR(efx, "%s sync failed (%d)\n", efx_mtd->name, rc); + return; +} + +void efx_mtd_remove(struct efx_nic *efx) +{ + if (efx->spi_flash && efx->spi_flash->mtd) { + struct efx_mtd *efx_mtd = efx->spi_flash->mtd; + int rc; + + for (;;) { + rc = del_mtd_device(&efx_mtd->mtd); + if (rc != -EBUSY) + break; + ssleep(1); + } + WARN_ON(rc); + kfree(efx_mtd); + } +} + +void efx_mtd_rename(struct efx_nic *efx) +{ + if (efx->spi_flash && efx->spi_flash->mtd) { + struct efx_mtd *efx_mtd = efx->spi_flash->mtd; + snprintf(efx_mtd->name, sizeof(efx_mtd->name), + "%s sfc_flash_bootrom", efx->name); + } +} + +int efx_mtd_probe(struct efx_nic *efx) +{ + struct efx_spi_device *spi = efx->spi_flash; + struct efx_mtd *efx_mtd; + + if (!spi || spi->size <= FALCON_FLASH_BOOTCODE_START) + return -ENODEV; + + efx_mtd = kzalloc(sizeof(*efx_mtd), GFP_KERNEL); + if (!efx_mtd) + return -ENOMEM; + + efx_mtd->spi = spi; + spi->mtd = efx_mtd; + + efx_mtd->mtd.type = MTD_NORFLASH; + efx_mtd->mtd.flags = MTD_CAP_NORFLASH; + efx_mtd->mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START; + efx_mtd->mtd.erasesize = spi->erase_size; + efx_mtd->mtd.writesize = 1; + efx_mtd_rename(efx); + + efx_mtd->mtd.owner = THIS_MODULE; + efx_mtd->mtd.priv = efx_mtd; + efx_mtd->mtd.name = efx_mtd->name; + efx_mtd->mtd.erase = efx_mtd_erase; + efx_mtd->mtd.read = efx_mtd_read; + efx_mtd->mtd.write = efx_mtd_write; + efx_mtd->mtd.sync = efx_mtd_sync; + + if (add_mtd_device(&efx_mtd->mtd)) { + kfree(efx_mtd); + spi->mtd = NULL; + /* add_mtd_device() returns 1 if the MTD table is full */ + return -ENOMEM; + } + + return 0; +} diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h index cdb11fad605..c953eb19df4 100644 --- a/drivers/net/sfc/net_driver.h +++ b/drivers/net/sfc/net_driver.h @@ -655,6 +655,7 @@ union efx_multicast_hash { * This field will be %NULL if no flash device is present. * @spi_eeprom: SPI EEPROM device * This field will be %NULL if no EEPROM device is present. + * @spi_lock: SPI bus lock * @n_rx_nodesc_drop_cnt: RX no descriptor drop count * @nic_data: Hardware dependant state * @mac_lock: MAC access lock. Protects @port_enabled, @phy_mode, @@ -731,6 +732,7 @@ struct efx_nic { struct efx_spi_device *spi_flash; struct efx_spi_device *spi_eeprom; + struct mutex spi_lock; unsigned n_rx_nodesc_drop_cnt; diff --git a/drivers/net/sfc/spi.h b/drivers/net/sfc/spi.h index b73f86cf5fa..c4aca132348 100644 --- a/drivers/net/sfc/spi.h +++ b/drivers/net/sfc/spi.h @@ -25,6 +25,7 @@ #define SPI_WRDI 0x04 /* Reset write enable latch */ #define SPI_RDSR 0x05 /* Read status register */ #define SPI_WREN 0x06 /* Set write enable latch */ +#define SPI_SST_EWSR 0x50 /* SST: Enable write to status register */ #define SPI_STATUS_WPEN 0x80 /* Write-protect pin enabled */ #define SPI_STATUS_BP2 0x10 /* Block protection bit 2 */ @@ -36,6 +37,7 @@ /** * struct efx_spi_device - an Efx SPI (Serial Peripheral Interface) device * @efx: The Efx controller that owns this device + * @mtd: MTD state * @device_id: Controller's id for the device * @size: Size (in bytes) * @addr_len: Number of address bytes in read/write commands @@ -44,20 +46,30 @@ * use bit 3 of the command byte as address bit A8, rather * than having a two-byte address. If this flag is set, then * commands should be munged in this way. + * @erase_command: Erase command (or 0 if sector erase not needed). + * @erase_size: Erase sector size (in bytes) + * Erase commands affect sectors with this size and alignment. + * This must be a power of two. * @block_size: Write block size (in bytes). * Write commands are limited to blocks with this size and alignment. - * @read: Read function for the device - * @write: Write function for the device */ struct efx_spi_device { struct efx_nic *efx; +#ifdef CONFIG_SFC_MTD + void *mtd; +#endif int device_id; unsigned int size; unsigned int addr_len; unsigned int munge_address:1; + u8 erase_command; + unsigned int erase_size; unsigned int block_size; }; +int falcon_spi_cmd(const struct efx_spi_device *spi, unsigned int command, + int address, const void* in, void *out, unsigned int len); +int falcon_spi_fast_wait(const struct efx_spi_device *spi); int falcon_spi_read(const struct efx_spi_device *spi, loff_t start, size_t len, size_t *retlen, u8 *buffer); int falcon_spi_write(const struct efx_spi_device *spi, loff_t start, @@ -77,6 +89,7 @@ int falcon_spi_write(const struct efx_spi_device *spi, loff_t start, * be absent or truncated depending on the devices used. */ #define FALCON_NVCONFIG_END 0x400U +#define FALCON_FLASH_BOOTCODE_START 0x8000U #define EFX_EEPROM_BOOTCONFIG_START 0x800U #define EFX_EEPROM_BOOTCONFIG_END 0x1800U |