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 <[EMAIL PROTECTED]>
Signed-off-by: Jesse Brandeburg <[EMAIL PROTECTED]>
Signed-off-by: John Ronciak <[EMAIL PROTECTED]>
---
drivers/net/e1000/e1000_main.c | 21 +++++++--------------
drivers/net/e1000/e1000_param.c | 2 +-
2 files changed, 8 insertions(+), 15 deletions(-)
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 4016264..cefc7cc 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -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 *adapte
}
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 *adapte
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;
diff --git a/drivers/net/e1000/e1000_param.c b/drivers/net/e1000/e1000_param.c
index eb3f009..37fbb56 100644
--- a/drivers/net/e1000/e1000_param.c
+++ b/drivers/net/e1000/e1000_param.c
@@ -388,7 +388,7 @@ e1000_check_options(struct e1000_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 */
-
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