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[PATCH] e1000: Fix flow control water marks

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Fixed flow control water marks based on PBA size.
Store flow control state in original_fc in addition to fc.

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>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Jeff Kirsher 2006-01-12 16:50:51 -08:00 committed by Jeff Garzik
parent 4d351858e4
commit f11b7f8535
2 changed files with 8 additions and 15 deletions
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21
drivers/net/e1000/e1000_main.c
View file

@ -504,10 +504,8 @@ 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.
@ -531,15 +529,8 @@ e1000_reset(struct e1000_adapter *adapter)
}
if((adapter->hw.mac_type != e1000_82573) &&
(adapter->netdev->mtu > E1000_RXBUFFER_8192)) {
(adapter->netdev->mtu > 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) {
@ -553,10 +544,12 @@ e1000_reset(struct e1000_adapter *adapter)
E1000_WRITE_REG(&adapter->hw, PBA, pba);
/* flow control settings */
adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
fc_high_water_mark;
adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
fc_low_water_mark;
/* Set the FC high water mark to 90% of the FIFO size.
* Required to clear last 3 LSB */
fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
adapter->hw.fc_high_water = fc_high_water_mark;
adapter->hw.fc_low_water = fc_high_water_mark - 8;
adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
adapter->hw.fc_send_xon = 1;
adapter->hw.fc = adapter->hw.original_fc;

2
drivers/net/e1000/e1000_param.c
View file

@ -388,7 +388,7 @@ e1000_check_options(struct e1000_adapter *adapter)
e1000_validate_option(&fc, &opt, adapter);
adapter->hw.fc = adapter->hw.original_fc = fc;
} else {
adapter->hw.fc = opt.def;
adapter->hw.fc = adapter->hw.original_fc = opt.def;
}
}
{ /* Transmit Interrupt Delay */