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Date: Tue, 08 Apr 2008 10:26:07 -0700
From: "Kok, Auke" <auke-jan.h.kok@...el.com>
To: Andy Gospodarek <andy@...yhouse.net>
CC: Carsten Aulbert <carsten.aulbert@....mpg.de>,
netdev@...r.kernel.org, bill.hayes@...com
Subject: Re: Setting alternate MAC addresses on e1000
Andy Gospodarek wrote:
> On Tue, Apr 01, 2008 at 03:15:54PM +0200, Carsten Aulbert wrote:
>> Hi,
>>
>> I know that quite a few e1000 experts are reading here, so I hope to
>> have some luck here:
>>
>> I need to reprogram the MAC addresses of several 82573E/L NICs. I tried
>> the obvious approach first using ethtool -E to write the numbers into
>> the first six bytes and this works quite ok [1], except that I need to
>> specifically change the second MAC not necessarily the first one. This
>> approach only changed the first NIC and left the second unchanged.
>>
>> I've browsed http://download.intel.com/design/network/manuals/31608004.pdf
>> quite a bit, but except finding that I seem to need to set word 0x37 to
>> point to 12 free bytes I have not come up with much. For example, I
>> don't know where I would find those 12 free bytes.
>>
>> Anyone with a different approach or a hint how to succeed?
>>
>> TIA
>>
>> Carsten
>>
>
> Bill posted a patch for this a while back (but it was not accepted since
> support for that hardware is offically moving to e1000e). This may be
> what you want....
yeah I thought of that as well and after digging through the documentation I don't
think this will work for 82573's - it seems that only 82571 hardware supports this
feature, which is not what Carsten needs.
as stated above, the alternate eeprom layout of the 82573 seems to also indicate that.
Auke
> Port alternate MAC address support from the sourceforge
> e1000 driver to the upstream e1000 driver.
>
> Signed-off-by: Bill Hayes <bill.hayes@...com>
> ---
>
> drivers/net/e1000/e1000_hw.c | 42 +++++++++++++++++++++++++++++++++++++++---
> drivers/net/e1000/e1000_hw.h | 2 ++
> 2 files changed, 41 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/e1000/e1000_hw.c b/drivers/net/e1000/e1000_hw.c
> index 8fa0fe4..07e3178 100644
> --- a/drivers/net/e1000/e1000_hw.c
> +++ b/drivers/net/e1000/e1000_hw.c
> @@ -719,6 +719,11 @@ e1000_reset_hw(struct e1000_hw *hw)
> DEBUGOUT("Masking off all interrupts\n");
> E1000_WRITE_REG(hw, IMC, 0xffffffff);
>
> + if (hw->mac_type == e1000_82571 && hw->alt_mac_addr_is_present) {
> + hw->laa_is_present = 1;
> + e1000_rar_set(hw, hw->mac_addr, E1000_RAR_ENTRIES - 1);
> + }
> +
> /* Clear any pending interrupt events. */
> icr = E1000_READ_REG(hw, ICR);
>
> @@ -5693,11 +5698,41 @@ e1000_read_mac_addr(struct e1000_hw * hw)
> {
> uint16_t offset;
> uint16_t eeprom_data, i;
> + u16 mac_addr_offset = 0;
>
> DEBUGFUNC("e1000_read_mac_addr");
>
> + 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. */
> + if (e1000_read_eeprom(hw, EEPROM_ALT_MAC_ADDR_PTR, 1,
> + &mac_addr_offset) < 0) {
> + DEBUGOUT("EEPROM Read Error\n");
> + return -E1000_ERR_EEPROM;
> + }
> + if (mac_addr_offset == 0xFFFF)
> + mac_addr_offset = 0;
> +
> + if (mac_addr_offset) {
> + if (E1000_READ_REG(hw, STATUS) & E1000_STATUS_FUNC_1)
> + mac_addr_offset += NODE_ADDRESS_SIZE/sizeof(u16);
> +
> + /* make sure we have a valid mac address here before using it */
> + if (e1000_read_eeprom(hw, mac_addr_offset, 1, &eeprom_data) < 0) {
> + DEBUGOUT("EEPROM Read Error\n");
> + return -E1000_ERR_EEPROM;
> + }
> + if (eeprom_data & 0x0001)
> + mac_addr_offset = 0;
> + }
> +
> + if (mac_addr_offset)
> + hw->alt_mac_addr_is_present = 1;
> + }
> +
> for (i = 0; i < NODE_ADDRESS_SIZE; i += 2) {
> - offset = i >> 1;
> + offset = mac_addr_offset + (i >> 1);
> if (e1000_read_eeprom(hw, offset, 1, &eeprom_data) < 0) {
> DEBUGOUT("EEPROM Read Error\n");
> return -E1000_ERR_EEPROM;
> @@ -5713,8 +5748,9 @@ e1000_read_mac_addr(struct e1000_hw * hw)
> case e1000_82546_rev_3:
> case e1000_82571:
> case e1000_80003es2lan:
> - if (E1000_READ_REG(hw, STATUS) & E1000_STATUS_FUNC_1)
> - hw->perm_mac_addr[5] ^= 0x01;
> + if (!mac_addr_offset &&
> + (E1000_READ_REG(hw, STATUS) & E1000_STATUS_FUNC_1))
> + hw->perm_mac_addr[5] ^= 0x01;
> break;
> }
>
> diff --git a/drivers/net/e1000/e1000_hw.h b/drivers/net/e1000/e1000_hw.h
> index a2a86c5..e18760d 100644
> --- a/drivers/net/e1000/e1000_hw.h
> +++ b/drivers/net/e1000/e1000_hw.h
> @@ -1456,6 +1456,7 @@ struct e1000_hw {
> boolean_t tbi_compatibility_en;
> boolean_t tbi_compatibility_on;
> boolean_t laa_is_present;
> + boolean_t alt_mac_addr_is_present;
> boolean_t phy_reset_disable;
> boolean_t initialize_hw_bits_disable;
> boolean_t fc_send_xon;
> @@ -2286,6 +2287,7 @@ struct e1000_host_command_info {
> #define EEPROM_INIT_CONTROL3_PORT_A 0x0024
> #define EEPROM_CFG 0x0012
> #define EEPROM_FLASH_VERSION 0x0032
> +#define EEPROM_ALT_MAC_ADDR_PTR 0x0037
> #define EEPROM_CHECKSUM_REG 0x003F
>
> #define E1000_EEPROM_CFG_DONE 0x00040000 /* MNG config cycle done */
>
> -
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