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igb: change how we handle alternate mac addresses 

This patch allows us to treat the alternate mac address as though it is the
physical address on the adapter.  This is accomplished by letting the
alt_mac_address function to only fail on an NVM error.  If no errors occur
and the alternate mac address is not present then RAR0 is read as the
default mac address.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-10-05 06:34:25 +00:00 committed by David S. Miller
parent 3272686c98
commit 22896639af
3 changed files with 22 additions and 10 deletions
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13
drivers/net/igb/e1000_82575.c
View File

@ -1152,9 +1152,18 @@ static s32 igb_read_mac_addr_82575(struct e1000_hw *hw)
{
s32 ret_val = 0;
if (igb_check_alt_mac_addr(hw))
ret_val = igb_read_mac_addr(hw);
/*
* If there's an alternate MAC address place it in RAR0
* so that it will override the Si installed default perm
* address.
*/
ret_val = igb_check_alt_mac_addr(hw);
if (ret_val)
goto out;
ret_val = igb_read_mac_addr(hw);
out:
return ret_val;
}

2
drivers/net/igb/e1000_hw.h
View File

@ -54,6 +54,8 @@ struct e1000_hw;
#define E1000_FUNC_0 0
#define E1000_FUNC_1 1
#define E1000_ALT_MAC_ADDRESS_OFFSET_LAN1 3
enum e1000_mac_type {
e1000_undefined = 0,
e1000_82575,

17
drivers/net/igb/e1000_mac.c
View File

@ -185,13 +185,12 @@ s32 igb_check_alt_mac_addr(struct e1000_hw *hw)
}
if (nvm_alt_mac_addr_offset == 0xFFFF) {
ret_val = -(E1000_NOT_IMPLEMENTED);
/* There is no Alternate MAC Address */
goto out;
}
if (hw->bus.func == E1000_FUNC_1)
nvm_alt_mac_addr_offset += ETH_ALEN/sizeof(u16);
nvm_alt_mac_addr_offset += E1000_ALT_MAC_ADDRESS_OFFSET_LAN1;
for (i = 0; i < ETH_ALEN; i += 2) {
offset = nvm_alt_mac_addr_offset + (i >> 1);
ret_val = hw->nvm.ops.read(hw, offset, 1, &nvm_data);
@ -206,14 +205,16 @@ s32 igb_check_alt_mac_addr(struct e1000_hw *hw)
/* if multicast bit is set, the alternate address will not be used */
if (alt_mac_addr[0] & 0x01) {
ret_val = -(E1000_NOT_IMPLEMENTED);
hw_dbg("Ignoring Alternate Mac Address with MC bit set\n");
goto out;
}
for (i = 0; i < ETH_ALEN; i++)
hw->mac.addr[i] = hw->mac.perm_addr[i] = alt_mac_addr[i];
hw->mac.ops.rar_set(hw, hw->mac.perm_addr, 0);
/*
* We have a valid alternate MAC address, and we want to treat it the
* same as the normal permanent MAC address stored by the HW into the
* RAR. Do this by mapping this address into RAR0.
*/
hw->mac.ops.rar_set(hw, alt_mac_addr, 0);
out:
return ret_val;