diff options
Diffstat (limited to 'drivers/net/e1000e/lib.c')
| -rw-r--r-- | drivers/net/e1000e/lib.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c index 0bdeca30c75f..16f35fadb74b 100644 --- a/drivers/net/e1000e/lib.c +++ b/drivers/net/e1000e/lib.c @@ -2059,9 +2059,44 @@ s32 e1000e_read_mac_addr(struct e1000_hw *hw) { s32 ret_val; u16 offset, nvm_data, i; + u16 mac_addr_offset = 0; + + if (hw->mac.type == e1000_82571) { + /* Check for an alternate MAC address. An alternate MAC + * address can be setup by pre-boot software and must be + * treated like a permanent address and must override the + * actual permanent MAC address. */ + ret_val = e1000_read_nvm(hw, NVM_ALT_MAC_ADDR_PTR, 1, + &mac_addr_offset); + if (ret_val) { + hw_dbg(hw, "NVM Read Error\n"); + return ret_val; + } + if (mac_addr_offset == 0xFFFF) + mac_addr_offset = 0; + + if (mac_addr_offset) { + if (hw->bus.func == E1000_FUNC_1) + mac_addr_offset += ETH_ALEN/sizeof(u16); + + /* make sure we have a valid mac address here + * before using it */ + ret_val = e1000_read_nvm(hw, mac_addr_offset, 1, + &nvm_data); + if (ret_val) { + hw_dbg(hw, "NVM Read Error\n"); + return ret_val; + } + if (nvm_data & 0x0001) + mac_addr_offset = 0; + } + + if (mac_addr_offset) + hw->dev_spec.e82571.alt_mac_addr_is_present = 1; + } for (i = 0; i < ETH_ALEN; i += 2) { - offset = i >> 1; + offset = mac_addr_offset + (i >> 1); ret_val = e1000_read_nvm(hw, offset, 1, &nvm_data); if (ret_val) { hw_dbg(hw, "NVM Read Error\n"); @@ -2072,7 +2107,7 @@ s32 e1000e_read_mac_addr(struct e1000_hw *hw) } /* Flip last bit of mac address if we're on second port */ - if (hw->bus.func == E1000_FUNC_1) + if (!mac_addr_offset && hw->bus.func == E1000_FUNC_1) hw->mac.perm_addr[5] ^= 1; for (i = 0; i < ETH_ALEN; i++) |