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authorDimitris Michailidis <dm@chelsio.com>2010-08-23 17:20:59 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-23 20:38:14 -0700
commit1478b3ee931e83c7a94f61376e962574b28d23d6 (patch)
treee22cb1de6256301f2e5cf5476b5219977af66dc9 /drivers/net/cxgb4
parente46dab4d4be87769b09404135bc34f89e2e155d8 (diff)
cxgb4: support eeprom read/write on functions other than 0
Extend the address translation for eeprom read/write (code used by ethtool -[eE]) to functions other than 0. Signed-off-by: Dimitris Michailidis <dm@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/cxgb4')
-rw-r--r--drivers/net/cxgb4/cxgb4_main.c40
-rw-r--r--drivers/net/cxgb4/t4_hw.h1
2 files changed, 32 insertions, 9 deletions
diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
index 6e08e2d8eb3e..7552d8df55ed 100644
--- a/drivers/net/cxgb4/cxgb4_main.c
+++ b/drivers/net/cxgb4/cxgb4_main.c
@@ -1681,27 +1681,41 @@ static int get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
return 0;
}
-/*
- * Translate a physical EEPROM address to virtual. The first 1K is accessed
- * through virtual addresses starting at 31K, the rest is accessed through
- * virtual addresses starting at 0. This mapping is correct only for PF0.
+/**
+ * eeprom_ptov - translate a physical EEPROM address to virtual
+ * @phys_addr: the physical EEPROM address
+ * @fn: the PCI function number
+ * @sz: size of function-specific area
+ *
+ * Translate a physical EEPROM address to virtual. The first 1K is
+ * accessed through virtual addresses starting at 31K, the rest is
+ * accessed through virtual addresses starting at 0.
+ *
+ * The mapping is as follows:
+ * [0..1K) -> [31K..32K)
+ * [1K..1K+A) -> [31K-A..31K)
+ * [1K+A..ES) -> [0..ES-A-1K)
+ *
+ * where A = @fn * @sz, and ES = EEPROM size.
*/
-static int eeprom_ptov(unsigned int phys_addr)
+static int eeprom_ptov(unsigned int phys_addr, unsigned int fn, unsigned int sz)
{
+ fn *= sz;
if (phys_addr < 1024)
return phys_addr + (31 << 10);
+ if (phys_addr < 1024 + fn)
+ return 31744 - fn + phys_addr - 1024;
if (phys_addr < EEPROMSIZE)
- return phys_addr - 1024;
+ return phys_addr - 1024 - fn;
return -EINVAL;
}
/*
* The next two routines implement eeprom read/write from physical addresses.
- * The physical->virtual translation is correct only for PF0.
*/
static int eeprom_rd_phys(struct adapter *adap, unsigned int phys_addr, u32 *v)
{
- int vaddr = eeprom_ptov(phys_addr);
+ int vaddr = eeprom_ptov(phys_addr, adap->fn, EEPROMPFSIZE);
if (vaddr >= 0)
vaddr = pci_read_vpd(adap->pdev, vaddr, sizeof(u32), v);
@@ -1710,7 +1724,7 @@ static int eeprom_rd_phys(struct adapter *adap, unsigned int phys_addr, u32 *v)
static int eeprom_wr_phys(struct adapter *adap, unsigned int phys_addr, u32 v)
{
- int vaddr = eeprom_ptov(phys_addr);
+ int vaddr = eeprom_ptov(phys_addr, adap->fn, EEPROMPFSIZE);
if (vaddr >= 0)
vaddr = pci_write_vpd(adap->pdev, vaddr, sizeof(u32), &v);
@@ -1753,6 +1767,14 @@ static int set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
aligned_offset = eeprom->offset & ~3;
aligned_len = (eeprom->len + (eeprom->offset & 3) + 3) & ~3;
+ if (adapter->fn > 0) {
+ u32 start = 1024 + adapter->fn * EEPROMPFSIZE;
+
+ if (aligned_offset < start ||
+ aligned_offset + aligned_len > start + EEPROMPFSIZE)
+ return -EPERM;
+ }
+
if (aligned_offset != eeprom->offset || aligned_len != eeprom->len) {
/*
* RMW possibly needed for first or last words.
diff --git a/drivers/net/cxgb4/t4_hw.h b/drivers/net/cxgb4/t4_hw.h
index 10a055565776..c26b455f37de 100644
--- a/drivers/net/cxgb4/t4_hw.h
+++ b/drivers/net/cxgb4/t4_hw.h
@@ -42,6 +42,7 @@ enum {
MAX_MTU = 9600, /* max MAC MTU, excluding header + FCS */
EEPROMSIZE = 17408, /* Serial EEPROM physical size */
EEPROMVSIZE = 32768, /* Serial EEPROM virtual address space size */
+ EEPROMPFSIZE = 1024, /* EEPROM writable area size for PFn, n>0 */
RSS_NENTRIES = 2048, /* # of entries in RSS mapping table */
TCB_SIZE = 128, /* TCB size */
NMTUS = 16, /* size of MTU table */