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authorPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>2009-05-17 12:35:16 +0000
committerDavid S. Miller <davem@davemloft.net>2009-05-17 21:04:13 -0700
commit264857b8fe8a16fc95f12e898951fc6bd4bdaa7a (patch)
treeefb090175b49f72170555eab18cdcf1156ed2a4a /drivers/net/ixgbe/ixgbe_common.c
parent70b77628d8d943b27cc0f72002b5884028aee38c (diff)
downloadop-kernel-dev-264857b8fe8a16fc95f12e898951fc6bd4bdaa7a.zip
op-kernel-dev-264857b8fe8a16fc95f12e898951fc6bd4bdaa7a.tar.gz
ixgbe: Allow link flow control in DCB mode for 82599 adapters
82599 supports using either link flow control or priority flow control when in DCB mode. The dcbnl interface already supports sending down configurations through rtnetlink that can enable LFC when DCB is enabled, so the driver should take advantage of this. 82598 does not support using LFC when DCB is enabled, so explicitly disable it when we're in DCB mode. This means we always run in PFC mode when DCB is enabled. Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_common.c')
-rw-r--r--drivers/net/ixgbe/ixgbe_common.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index 530da90..0cc3c47 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -1661,9 +1661,10 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num)
reg = IXGBE_READ_REG(hw, IXGBE_MTQC);
/* Thresholds are different for link flow control when in DCB mode */
if (reg & IXGBE_MTQC_RT_ENA) {
- rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
-
/* Always disable XON for LFC when in DCB mode */
+ IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), 0);
+
+ rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num));
reg = (rx_pba_size >> 2) & 0xFFE0;
if (hw->fc.current_mode & ixgbe_fc_tx_pause)
reg |= IXGBE_FCRTH_FCEN;
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