1 files changed, 15 insertions, 536 deletions

diff --git a/drivers/net/ethernet/sfc/mtd.c b/drivers/net/ethernet/sfc/mtd.c
index ba6c87a73d86..8be9a69a61e1 100644
--- a/drivers/net/ethernet/sfc/mtd.c
+++ b/drivers/net/ethernet/sfc/mtd.c
@@ -8,168 +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;
-	union {
-		struct {
-			bool updating;
-			u8 nvram_type;
-			u16 fw_subtype;
-		} mcdi;
-		struct {
-			const struct falcon_spi_device *spi;
-			size_t offset;
-		} falcon;
-	};
-	const char *dev_type_name;
-	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);
-};
 
 #define to_efx_mtd_partition(mtd)				\
 	container_of(mtd, struct efx_mtd_partition, 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 efx_mtd_partition *part, bool uninterruptible)
-{
-	const struct falcon_spi_device *spi = part->falcon.spi;
-	struct efx_nic *efx = part->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->name, part->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 efx_mtd_partition *part, loff_t start, size_t len)
-{
-	const struct falcon_spi_device *spi = part->falcon.spi;
-	struct efx_nic *efx = part->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)
@@ -177,7 +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 {
@@ -194,7 +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);
@@ -214,26 +63,15 @@ 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;
-
-	if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0)
-		snprintf(part->name, sizeof(part->name), "%s %s:%02x",
-			 efx->name, part->type_name, part->mcdi.fw_subtype);
-	else
-		snprintf(part->name, sizeof(part->name), "%s %s",
-			 efx->name, part->type_name);
-}
-
-static int efx_mtd_add(struct efx_nic *efx,
-		       struct efx_mtd_partition *parts, size_t n_parts)
+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;
 
 	for (i = 0; i < n_parts; i++) {
-		part = &parts[i];
+		part = (struct efx_mtd_partition *)((char *)parts +
+						    i * sizeof_part);
 
 		part->mtd.writesize = 1;
 
@@ -241,11 +79,11 @@ static int efx_mtd_add(struct efx_nic *efx,
 		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;
@@ -257,8 +95,11 @@ static int efx_mtd_add(struct efx_nic *efx,
 	return 0;
 
 fail:
-	while (i--)
-		efx_mtd_remove_partition(&parts[i]);
+	while (i--) {
+		part = (struct efx_mtd_partition *)((char *)parts +
+						    i * sizeof_part);
+		efx_mtd_remove_partition(part);
+	}
 	/* Failure is unlikely here, but probably means we're out of memory */
 	return -ENOMEM;
 }
@@ -288,367 +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 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_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->falcon.spi, part->falcon.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 efx_mtd_partition *part = to_efx_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->falcon.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 efx_mtd_partition *part = to_efx_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->falcon.spi,
-			      part->falcon.offset + start, len, retlen, buffer);
-	mutex_unlock(&nic_data->spi_lock);
-	return rc;
-}
-
-static int falcon_mtd_sync(struct mtd_info *mtd)
-{
-	struct efx_mtd_partition *part = to_efx_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 = {
-	.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 efx_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].falcon.spi = spi;
-		parts[n_parts].falcon.offset = FALCON_FLASH_BOOTCODE_START;
-		parts[n_parts].dev_type_name = "flash";
-		parts[n_parts].type_name = "sfc_flash_bootrom";
-		parts[n_parts].mtd.type = MTD_NORFLASH;
-		parts[n_parts].mtd.flags = MTD_CAP_NORFLASH;
-		parts[n_parts].mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START;
-		parts[n_parts].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].falcon.spi = spi;
-		parts[n_parts].falcon.offset = FALCON_EEPROM_BOOTCONFIG_START;
-		parts[n_parts].dev_type_name = "EEPROM";
-		parts[n_parts].type_name = "sfc_bootconfig";
-		parts[n_parts].mtd.type = MTD_RAM;
-		parts[n_parts].mtd.flags = MTD_CAP_RAM;
-		parts[n_parts].mtd.size =
-			min(spi->size, FALCON_EEPROM_BOOTCONFIG_END) -
-			FALCON_EEPROM_BOOTCONFIG_START;
-		parts[n_parts].mtd.erasesize = spi->erase_size;
-		n_parts++;
-	}
-
-	rc = efx_mtd_add(efx, parts, n_parts);
-	if (rc)
-		kfree(parts);
-	return rc;
-}
-
-/* Implementation of MTD operations for Siena */
-
-static int siena_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_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->mcdi.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_mtd_partition *part = to_efx_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->mtd.erasesize;
-	int rc = 0;
-
-	if (!part->mcdi.updating) {
-		rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type);
-		if (rc)
-			goto out;
-		part->mcdi.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->mcdi.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_mtd_partition *part = to_efx_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->mcdi.updating) {
-		rc = efx_mcdi_nvram_update_start(efx, part->mcdi.nvram_type);
-		if (rc)
-			goto out;
-		part->mcdi.updating = true;
-	}
-
-	while (offset < end) {
-		chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
-		rc = efx_mcdi_nvram_write(efx, part->mcdi.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_mtd_partition *part = to_efx_mtd_partition(mtd);
-	struct efx_nic *efx = mtd->priv;
-	int rc = 0;
-
-	if (part->mcdi.updating) {
-		part->mcdi.updating = false;
-		rc = efx_mcdi_nvram_update_finish(efx, part->mcdi.nvram_type);
-	}
-
-	return rc;
+		efx->type->mtd_rename(part);
 }
-
-static const struct efx_mtd_ops siena_mtd_ops = {
-	.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_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->mcdi.nvram_type = type;
-	part->dev_type_name = "Siena NVRAM manager";
-	part->type_name = info->name;
-
-	part->mtd.type = MTD_NORFLASH;
-	part->mtd.flags = MTD_CAP_NORFLASH;
-	part->mtd.size = size;
-	part->mtd.erasesize = erase_size;
-
-	return 0;
-}
-
-static int siena_mtd_get_fw_subtypes(struct efx_nic *efx,
-				     struct efx_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].mcdi.fw_subtype =
-			fw_subtype_list[parts[i].mcdi.nvram_type];
-
-	return 0;
-}
-
-static int siena_mtd_probe(struct efx_nic *efx)
-{
-	struct efx_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, n_parts);
-fail:
-	if (rc)
-		kfree(parts);
-	return rc;
-}
-