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Commit 0a95f563 authored by Ben Hutchings's avatar Ben Hutchings Committed by Jeff Garzik
Browse files

sfc: Clean up non-volatile memory partitioning 



Move flash and EEPROM partition boundary constants into spi.h and rename
them to be consistent.

Add a comment on the partitioning.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 2883f552

drivers/net/sfc/ethtool.c

+4 −7
Original line number Diff line number Diff line
@@ -172,10 +172,7 @@ static struct efx_ethtool_stat efx_ethtool_stats[] = { 
/* Number of ethtool statistics */

#define EFX_ETHTOOL_NUM_STATS ARRAY_SIZE(efx_ethtool_stats)



/* EEPROM range with gPXE configuration */

#define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB

#define EFX_ETHTOOL_EEPROM_MIN 0x800U

#define EFX_ETHTOOL_EEPROM_MAX 0x1800U



/**************************************************************************

 *
@@ -545,8 +542,8 @@ static int efx_ethtool_get_eeprom_len(struct net_device *net_dev) 


	if (!spi)

		return 0;

	return min(spi->size, EFX_ETHTOOL_EEPROM_MAX) -

		min(spi->size, EFX_ETHTOOL_EEPROM_MIN);

	return min(spi->size, EFX_EEPROM_BOOTCONFIG_END) -

		min(spi->size, EFX_EEPROM_BOOTCONFIG_START);

}



static int efx_ethtool_get_eeprom(struct net_device *net_dev,
@@ -557,7 +554,7 @@ static int efx_ethtool_get_eeprom(struct net_device *net_dev, 
	size_t len;

	int rc;



	rc = falcon_spi_read(spi, eeprom->offset + EFX_ETHTOOL_EEPROM_MIN,

	rc = falcon_spi_read(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,

			     eeprom->len, &len, buf);

	eeprom->magic = EFX_ETHTOOL_EEPROM_MAGIC;

	eeprom->len = len;
@@ -575,7 +572,7 @@ static int efx_ethtool_set_eeprom(struct net_device *net_dev, 
	if (eeprom->magic != EFX_ETHTOOL_EEPROM_MAGIC)

		return -EINVAL;



	rc = falcon_spi_write(spi, eeprom->offset + EFX_ETHTOOL_EEPROM_MIN,

	rc = falcon_spi_write(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,

			      eeprom->len, &len, buf);

	eeprom->len = len;

	return rc;

drivers/net/sfc/falcon.c

+3 −3
Original line number Diff line number Diff line
@@ -2253,13 +2253,13 @@ int falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out) 
	__le16 *word, *limit;

	u32 csum;



	region = kmalloc(NVCONFIG_END, GFP_KERNEL);

	region = kmalloc(FALCON_NVCONFIG_END, GFP_KERNEL);

	if (!region)

		return -ENOMEM;

	nvconfig = region + NVCONFIG_OFFSET;



	spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom;

	rc = falcon_spi_read(spi, 0, NVCONFIG_END, NULL, region);

	rc = falcon_spi_read(spi, 0, FALCON_NVCONFIG_END, NULL, region);

	if (rc) {

		EFX_ERR(efx, "Failed to read %s\n",

			efx->spi_flash ? "flash" : "EEPROM");
@@ -2283,7 +2283,7 @@ int falcon_read_nvram(struct efx_nic *efx, struct falcon_nvconfig *nvconfig_out) 
		limit = (__le16 *) (nvconfig + 1);

	} else {

		word = region;

		limit = region + NVCONFIG_END;

		limit = region + FALCON_NVCONFIG_END;

	}

	for (csum = 0; word < limit; ++word)

		csum += le16_to_cpu(*word);

drivers/net/sfc/falcon_hwdefs.h

+0 −1
Original line number Diff line number Diff line
@@ -1150,7 +1150,6 @@ struct falcon_nvconfig_board_v3 { 
	(((type) >> EFX_LOW_BIT(field)) & EFX_MASK32(EFX_WIDTH(field)))



#define NVCONFIG_OFFSET 0x300

#define NVCONFIG_END 0x400



#define NVCONFIG_BOARD_MAGIC_NUM 0xFA1C

struct falcon_nvconfig {

drivers/net/sfc/spi.h

+17 −0
Original line number Diff line number Diff line
@@ -63,4 +63,21 @@ int falcon_spi_read(const struct efx_spi_device *spi, loff_t start, 
int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,

		     size_t len, size_t *retlen, const u8 *buffer);



/*

 * SFC4000 flash is partitioned into:

 *     0-0x400       chip and board config (see falcon_hwdefs.h)

 *     0x400-0x8000  unused (or may contain VPD if EEPROM not present)

 *     0x8000-end    boot code (mapped to PCI expansion ROM)

 * SFC4000 small EEPROM (size < 0x400) is used for VPD only.

 * SFC4000 large EEPROM (size >= 0x400) is partitioned into:

 *     0-0x400       chip and board config

 *     configurable  VPD

 *     0x800-0x1800  boot config

 * Aside from the chip and board config, all of these are optional and may

 * be absent or truncated depending on the devices used.

 */

#define FALCON_NVCONFIG_END 0x400U

#define EFX_EEPROM_BOOTCONFIG_START 0x800U

#define EFX_EEPROM_BOOTCONFIG_END 0x1800U



#endif /* EFX_SPI_H */