Commit 76884835 authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller
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sfc: Extend MTD driver for use with new NICs



In new NICs flash is managed by firmware and we will use high-level
operations on partitions rather than direct SPI commands.  Add support
for multiple MTD partitions per flash device and remove the direct
link between MTD and SPI devices.  Maintain a list of MTD partitions
in struct efx_nic.
Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c1c4f453
......@@ -1977,6 +1977,9 @@ static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
spin_lock_init(&efx->biu_lock);
mutex_init(&efx->mdio_lock);
mutex_init(&efx->spi_lock);
#ifdef CONFIG_SFC_MTD
INIT_LIST_HEAD(&efx->mtd_list);
#endif
INIT_WORK(&efx->reset_work, efx_reset_work);
INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
efx->pci_dev = pci_dev;
......
......@@ -567,7 +567,8 @@ static int efx_ethtool_get_eeprom(struct net_device *net_dev,
rc = mutex_lock_interruptible(&efx->spi_lock);
if (rc)
return rc;
rc = falcon_spi_read(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
rc = falcon_spi_read(efx, spi,
eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
eeprom->len, &len, buf);
mutex_unlock(&efx->spi_lock);
......@@ -590,7 +591,8 @@ static int efx_ethtool_set_eeprom(struct net_device *net_dev,
rc = mutex_lock_interruptible(&efx->spi_lock);
if (rc)
return rc;
rc = falcon_spi_write(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
rc = falcon_spi_write(efx, spi,
eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
eeprom->len, &len, buf);
mutex_unlock(&efx->spi_lock);
......
......@@ -1640,11 +1640,10 @@ static int falcon_spi_wait(struct efx_nic *efx)
}
}
int falcon_spi_cmd(const struct efx_spi_device *spi,
int falcon_spi_cmd(struct efx_nic *efx, const struct efx_spi_device *spi,
unsigned int command, int address,
const void *in, void *out, size_t len)
{
struct efx_nic *efx = spi->efx;
bool addressed = (address >= 0);
bool reading = (out != NULL);
efx_oword_t reg;
......@@ -1713,15 +1712,15 @@ efx_spi_munge_command(const struct efx_spi_device *spi,
}
/* Wait up to 10 ms for buffered write completion */
int falcon_spi_wait_write(const struct efx_spi_device *spi)
int
falcon_spi_wait_write(struct efx_nic *efx, const struct efx_spi_device *spi)
{
struct efx_nic *efx = spi->efx;
unsigned long timeout = jiffies + 1 + DIV_ROUND_UP(HZ, 100);
u8 status;
int rc;
for (;;) {
rc = falcon_spi_cmd(spi, SPI_RDSR, -1, NULL,
rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
&status, sizeof(status));
if (rc)
return rc;
......@@ -1737,8 +1736,8 @@ int falcon_spi_wait_write(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_read(struct efx_nic *efx, const struct efx_spi_device *spi,
loff_t start, size_t len, size_t *retlen, u8 *buffer)
{
size_t block_len, pos = 0;
unsigned int command;
......@@ -1748,7 +1747,7 @@ int falcon_spi_read(const struct efx_spi_device *spi, loff_t start,
block_len = min(len - pos, FALCON_SPI_MAX_LEN);
command = efx_spi_munge_command(spi, SPI_READ, start + pos);
rc = falcon_spi_cmd(spi, command, start + pos, NULL,
rc = falcon_spi_cmd(efx, spi, command, start + pos, NULL,
buffer + pos, block_len);
if (rc)
break;
......@@ -1767,8 +1766,9 @@ int falcon_spi_read(const struct efx_spi_device *spi, loff_t start,
return rc;
}
int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
size_t len, size_t *retlen, const u8 *buffer)
int
falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi,
loff_t start, size_t len, size_t *retlen, const u8 *buffer)
{
u8 verify_buffer[FALCON_SPI_MAX_LEN];
size_t block_len, pos = 0;
......@@ -1776,24 +1776,24 @@ int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
int rc = 0;
while (pos < len) {
rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0);
rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
if (rc)
break;
block_len = min(len - pos,
falcon_spi_write_limit(spi, start + pos));
command = efx_spi_munge_command(spi, SPI_WRITE, start + pos);
rc = falcon_spi_cmd(spi, command, start + pos,
rc = falcon_spi_cmd(efx, spi, command, start + pos,
buffer + pos, NULL, block_len);
if (rc)
break;
rc = falcon_spi_wait_write(spi);
rc = falcon_spi_wait_write(efx, spi);
if (rc)
break;
command = efx_spi_munge_command(spi, SPI_READ, start + pos);
rc = falcon_spi_cmd(spi, command, start + pos,
rc = falcon_spi_cmd(efx, spi, command, start + pos,
NULL, verify_buffer, block_len);
if (memcmp(verify_buffer, buffer + pos, block_len)) {
rc = -EIO;
......@@ -2352,7 +2352,7 @@ falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out)
nvconfig = region + FALCON_NVCONFIG_OFFSET;
mutex_lock(&efx->spi_lock);
rc = falcon_spi_read(spi, 0, FALCON_NVCONFIG_END, NULL, region);
rc = falcon_spi_read(efx, spi, 0, FALCON_NVCONFIG_END, NULL, region);
mutex_unlock(&efx->spi_lock);
if (rc) {
EFX_ERR(efx, "Failed to read %s\n",
......@@ -2710,8 +2710,6 @@ static int falcon_spi_device_init(struct efx_nic *efx,
spi_device->block_size =
1 << SPI_DEV_TYPE_FIELD(device_type,
SPI_DEV_TYPE_BLOCK_SIZE);
spi_device->efx = efx;
} else {
spi_device = NULL;
}
......
......@@ -11,26 +11,58 @@
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/delay.h>
#include <linux/rtnetlink.h>
#define EFX_DRIVER_NAME "sfc_mtd"
#include "net_driver.h"
#include "spi.h"
#include "efx.h"
#include "falcon.h"
#define EFX_SPI_VERIFY_BUF_LEN 16
struct efx_mtd {
const struct efx_spi_device *spi;
struct efx_mtd_partition {
struct mtd_info mtd;
size_t offset;
const char *type_name;
char name[IFNAMSIZ + 20];
};
struct efx_mtd_ops {
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);
};
struct efx_mtd {
struct list_head node;
struct efx_nic *efx;
const struct efx_spi_device *spi;
const char *name;
const struct efx_mtd_ops *ops;
size_t n_parts;
struct efx_mtd_partition part[0];
};
#define efx_for_each_partition(part, efx_mtd) \
for ((part) = &(efx_mtd)->part[0]; \
(part) != &(efx_mtd)->part[(efx_mtd)->n_parts]; \
(part)++)
#define to_efx_mtd_partition(mtd) \
container_of(mtd, struct efx_mtd_partition, mtd)
static int falcon_mtd_probe(struct efx_nic *efx);
/* 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;
struct efx_nic *efx = efx_mtd->efx;
u8 status;
int rc, i;
......@@ -39,7 +71,7 @@ static int efx_spi_slow_wait(struct efx_mtd *efx_mtd, bool uninterruptible)
__set_current_state(uninterruptible ?
TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10);
rc = falcon_spi_cmd(spi, SPI_RDSR, -1, NULL,
rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
&status, sizeof(status));
if (rc)
return rc;
......@@ -52,32 +84,35 @@ static int efx_spi_slow_wait(struct efx_mtd *efx_mtd, bool uninterruptible)
return -ETIMEDOUT;
}
static int efx_spi_unlock(const struct efx_spi_device *spi)
static int
efx_spi_unlock(struct efx_nic *efx, 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));
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(spi, SPI_WREN, -1, NULL, NULL, 0);
rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
if (rc)
return rc;
rc = falcon_spi_cmd(spi, SPI_SST_EWSR, -1, NULL, NULL, 0);
rc = falcon_spi_cmd(efx, 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));
rc = falcon_spi_cmd(efx, spi, SPI_WRSR, -1, &status,
NULL, sizeof(status));
if (rc)
return rc;
rc = falcon_spi_wait_write(spi);
rc = falcon_spi_wait_write(efx, spi);
if (rc)
return rc;
......@@ -87,6 +122,7 @@ static int efx_spi_unlock(const struct efx_spi_device *spi)
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;
struct efx_nic *efx = efx_mtd->efx;
unsigned pos, block_len;
u8 empty[EFX_SPI_VERIFY_BUF_LEN];
u8 buffer[EFX_SPI_VERIFY_BUF_LEN];
......@@ -98,13 +134,14 @@ static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len)
if (spi->erase_command == 0)
return -EOPNOTSUPP;
rc = efx_spi_unlock(spi);
rc = efx_spi_unlock(efx, spi);
if (rc)
return rc;
rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0);
rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
if (rc)
return rc;
rc = falcon_spi_cmd(spi, spi->erase_command, start, NULL, NULL, 0);
rc = falcon_spi_cmd(efx, spi, spi->erase_command, start, NULL,
NULL, 0);
if (rc)
return rc;
rc = efx_spi_slow_wait(efx_mtd, false);
......@@ -113,7 +150,8 @@ static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len)
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);
rc = falcon_spi_read(efx, spi, start + pos, block_len,
NULL, buffer);
if (rc)
return rc;
if (memcmp(empty, buffer, block_len))
......@@ -130,140 +168,228 @@ static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len)
/* MTD interface */
static int efx_mtd_read(struct mtd_info *mtd, loff_t start, size_t len,
size_t *retlen, u8 *buffer)
static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
{
struct efx_mtd *efx_mtd = mtd->priv;
int rc;
rc = efx_mtd->ops->erase(mtd, erase->addr, erase->len);
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 void efx_mtd_sync(struct mtd_info *mtd)
{
struct efx_mtd *efx_mtd = mtd->priv;
struct efx_nic *efx = efx_mtd->efx;
int rc;
rc = efx_mtd->ops->sync(mtd);
if (rc)
EFX_ERR(efx, "%s sync failed (%d)\n", efx_mtd->name, rc);
}
static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
{
int rc;
for (;;) {
rc = del_mtd_device(&part->mtd);
if (rc != -EBUSY)
break;
ssleep(1);
}
WARN_ON(rc);
}
static void efx_mtd_remove_device(struct efx_mtd *efx_mtd)
{
struct efx_mtd_partition *part;
efx_for_each_partition(part, efx_mtd)
efx_mtd_remove_partition(part);
list_del(&efx_mtd->node);
kfree(efx_mtd);
}
static void efx_mtd_rename_device(struct efx_mtd *efx_mtd)
{
struct efx_mtd_partition *part;
efx_for_each_partition(part, efx_mtd)
snprintf(part->name, sizeof(part->name),
"%s %s", efx_mtd->efx->name,
part->type_name);
}
static int efx_mtd_probe_device(struct efx_nic *efx, struct efx_mtd *efx_mtd)
{
struct efx_mtd_partition *part;
efx_mtd->efx = efx;
efx_mtd_rename_device(efx_mtd);
efx_for_each_partition(part, efx_mtd) {
part->mtd.writesize = 1;
part->mtd.owner = THIS_MODULE;
part->mtd.priv = efx_mtd;
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.sync = efx_mtd_sync;
if (add_mtd_device(&part->mtd))
goto fail;
}
list_add(&efx_mtd->node, &efx->mtd_list);
return 0;
fail:
while (part != &efx_mtd->part[0]) {
--part;
efx_mtd_remove_partition(part);
}
/* add_mtd_device() returns 1 if the MTD table is full */
return -ENOMEM;
}
void efx_mtd_remove(struct efx_nic *efx)
{
struct efx_mtd *efx_mtd, *next;
WARN_ON(efx_dev_registered(efx));
list_for_each_entry_safe(efx_mtd, next, &efx->mtd_list, node)
efx_mtd_remove_device(efx_mtd);
}
void efx_mtd_rename(struct efx_nic *efx)
{
struct efx_mtd *efx_mtd;
ASSERT_RTNL();
list_for_each_entry(efx_mtd, &efx->mtd_list, node)
efx_mtd_rename_device(efx_mtd);
}
int efx_mtd_probe(struct efx_nic *efx)
{
return falcon_mtd_probe(efx);
}
/* Implementation of MTD operations for Falcon */
static int falcon_mtd_read(struct mtd_info *mtd, loff_t start,
size_t len, size_t *retlen, u8 *buffer)
{
struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
struct efx_mtd *efx_mtd = mtd->priv;
const struct efx_spi_device *spi = efx_mtd->spi;
struct efx_nic *efx = spi->efx;
struct efx_nic *efx = efx_mtd->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);
rc = falcon_spi_read(efx, spi, part->offset + start, len,
retlen, buffer);
mutex_unlock(&efx->spi_lock);
return rc;
}
static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
static int falcon_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)
{
struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
struct efx_mtd *efx_mtd = mtd->priv;
struct efx_nic *efx = efx_mtd->spi->efx;
struct efx_nic *efx = efx_mtd->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);
rc = efx_spi_erase(efx_mtd, part->offset + start, 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)
static int falcon_mtd_write(struct mtd_info *mtd, loff_t start,
size_t len, size_t *retlen, const u8 *buffer)
{
struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
struct efx_mtd *efx_mtd = mtd->priv;
const struct efx_spi_device *spi = efx_mtd->spi;
struct efx_nic *efx = spi->efx;
struct efx_nic *efx = efx_mtd->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);
rc = falcon_spi_write(efx, spi, part->offset + start, len,
retlen, buffer);
mutex_unlock(&efx->spi_lock);
return rc;
}
static void efx_mtd_sync(struct mtd_info *mtd)
static int falcon_mtd_sync(struct mtd_info *mtd)
{
struct efx_mtd *efx_mtd = mtd->priv;
struct efx_nic *efx = efx_mtd->spi->efx;
struct efx_nic *efx = efx_mtd->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);
}
return rc;
}
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);
}
}
static struct efx_mtd_ops falcon_mtd_ops = {
.read = falcon_mtd_read,
.erase = falcon_mtd_erase,
.write = falcon_mtd_write,
.sync = falcon_mtd_sync,
};
int efx_mtd_probe(struct efx_nic *efx)
static int falcon_mtd_probe(struct efx_nic *efx)
{
struct efx_spi_device *spi = efx->spi_flash;
struct efx_mtd *efx_mtd;
int rc;
ASSERT_RTNL();
if (!spi || spi->size <= FALCON_FLASH_BOOTCODE_START)
return -ENODEV;
efx_mtd = kzalloc(sizeof(*efx_mtd), GFP_KERNEL);
efx_mtd = kzalloc(sizeof(*efx_mtd) + sizeof(efx_mtd->part[0]),
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)) {
efx_mtd->name = "flash";
efx_mtd->ops = &falcon_mtd_ops;
efx_mtd->n_parts = 1;
efx_mtd->part[0].mtd.type = MTD_NORFLASH;
efx_mtd->part[0].mtd.flags = MTD_CAP_NORFLASH;
efx_mtd->part[0].mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START;
efx_mtd->part[0].mtd.erasesize = spi->erase_size;
efx_mtd->part[0].offset = FALCON_FLASH_BOOTCODE_START;
efx_mtd->part[0].type_name = "sfc_flash_bootrom";
rc = efx_mtd_probe_device(efx, efx_mtd);
if (rc)
kfree(efx_mtd);
spi->mtd = NULL;
/* add_mtd_device() returns 1 if the MTD table is full */
return -ENOMEM;
}
return 0;
return rc;
}
......@@ -674,10 +674,11 @@ union efx_multicast_hash {
* interrupt is handled. It is used by falcon_test_interrupt()
* to verify that an interrupt has occurred.
* @spi_flash: SPI flash device
* This field will be %NULL if no flash device is present.
* This field will be %NULL if no flash device is present (or for Siena).
* @spi_eeprom: SPI EEPROM device
* This field will be %NULL if no EEPROM device is present.
* This field will be %NULL if no EEPROM device is present (or for Siena).
* @spi_lock: SPI bus lock
* @mtd_list: List of MTDs attached to the NIC
* @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,
......@@ -759,6 +760,9 @@ struct efx_nic {
struct efx_spi_device *spi_flash;