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e1000: Add enabled Jumbo frame support for 82573L

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Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
This commit is contained in:
Jeff Kirsher
2006-03-02 18:20:29 -08:00
committed by root
parent 9f68788856
commit 85b22eb632
2 changed files with 20 additions and 1 deletions
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16
drivers/net/e1000/e1000_main.c
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@@ -2978,6 +2978,7 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
uint16_t eeprom_data = 0;
if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
@@ -2989,12 +2990,25 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
switch (adapter->hw.mac_type) {
case e1000_82542_rev2_0:
case e1000_82542_rev2_1:
case e1000_82573:
if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
return -EINVAL;
}
break;
case e1000_82573:
/* only enable jumbo frames if ASPM is disabled completely
* this means both bits must be zero in 0x1A bits 3:2 */
e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
&eeprom_data);
if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
DPRINTK(PROBE, ERR,
"Jumbo Frames not supported.\n");
return -EINVAL;
}
break;
}
/* fall through to get support */
case e1000_82571:
case e1000_82572:
#define MAX_STD_JUMBO_FRAME_SIZE 9234