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: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index cd0d087..df0579e 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -172,10 +172,7 @@
/* 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 @@
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 @@
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 @@
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;
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 31ed1f4..3f74cef 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -2253,13 +2253,13 @@
__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 @@
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);
diff --git a/drivers/net/sfc/falcon_hwdefs.h b/drivers/net/sfc/falcon_hwdefs.h
index 5d584b0..040e70e 100644
--- a/drivers/net/sfc/falcon_hwdefs.h
+++ b/drivers/net/sfc/falcon_hwdefs.h
@@ -1150,7 +1150,6 @@
(((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 {
diff --git a/drivers/net/sfc/spi.h b/drivers/net/sfc/spi.h
index feef619..b73f86c 100644
--- a/drivers/net/sfc/spi.h
+++ b/drivers/net/sfc/spi.h
@@ -63,4 +63,21 @@
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 */