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[PATCH] e1000:Adjust flow control watermarks for Jumbo Frames 

Adjust flow control watermarks for Jumbo Frames

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
diff -up net-drivers-2.6/drivers/net/e1000/e1000_main.c net-drivers-2.6/drivers/net/e1000.new/e1000_main.c
5bit-waveforms
Malli Chilakala 2005-04-28 19:44:25 -07:00 committed by Jeff Garzik
parent 0e6ef3e02b
commit 1125ecbc0a
1 changed files with 15 additions and 2 deletions
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17
drivers/net/e1000/e1000_main.c
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@ -409,7 +409,10 @@ e1000_down(struct e1000_adapter *adapter)
void
e1000_reset(struct e1000_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
uint32_t pba, manc;
uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
/* Repartition Pba for greater than 9k mtu
* To take effect CTRL.RST is required.
@ -428,6 +431,16 @@ e1000_reset(struct e1000_adapter *adapter)
break;
}
if((adapter->hw.mac_type != e1000_82573) &&
(adapter->rx_buffer_len > E1000_RXBUFFER_8192)) {
pba -= 8; /* allocate more FIFO for Tx */
/* send an XOFF when there is enough space in the
* Rx FIFO to hold one extra full size Rx packet
*/
fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
ETHERNET_FCS_SIZE + 1;
fc_low_water_mark = fc_high_water_mark + 8;
}
if(adapter->hw.mac_type == e1000_82547) {
@ -442,9 +455,9 @@ e1000_reset(struct e1000_adapter *adapter)
/* flow control settings */
adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
E1000_FC_HIGH_DIFF;
fc_high_water_mark;
adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
E1000_FC_LOW_DIFF;
fc_low_water_mark;
adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
adapter->hw.fc_send_xon = 1;
adapter->hw.fc = adapter->hw.original_fc;