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ixgbe: DCB: enable RSS to be used with DCB

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RSS had previously been disabled when DCB was enabled because
DCB was single queued per traffic class. Now that DCB implements
multiple Tx/Rx rings per traffic class enable RSS.

Here RSS hashes across the queues in the traffic class.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Ross Brattain <ross.b.brattain.@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
John Fastabend 2011-02-23 05:58:08 +00:00 committed by Jeff Kirsher
parent 24095aa347
commit 8187cd485b
2 changed files with 25 additions and 9 deletions
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2
drivers/net/ixgbe/ixgbe_dcb_nl.c
View file

@ -129,7 +129,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_clear_interrupt_scheme(adapter);
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
switch (adapter->hw.mac.type) {
case ixgbe_mac_82598EB:
adapter->last_lfc_mode = adapter->hw.fc.current_mode;
@ -162,7 +161,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
adapter->temp_dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.pfc_mode_enable = false;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
switch (adapter->hw.mac.type) {
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:

32
drivers/net/ixgbe/ixgbe_main.c
View file

@ -2892,17 +2892,20 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
);
switch (mask) {
#ifdef CONFIG_IXGBE_DCB
case (IXGBE_FLAG_DCB_ENABLED | IXGBE_FLAG_RSS_ENABLED):
mrqc = IXGBE_MRQC_RTRSS8TCEN;
break;
case (IXGBE_FLAG_DCB_ENABLED):
mrqc = IXGBE_MRQC_RT8TCEN;
break;
#endif /* CONFIG_IXGBE_DCB */
case (IXGBE_FLAG_RSS_ENABLED):
mrqc = IXGBE_MRQC_RSSEN;
break;
case (IXGBE_FLAG_SRIOV_ENABLED):
mrqc = IXGBE_MRQC_VMDQEN;
break;
#ifdef CONFIG_IXGBE_DCB
case (IXGBE_FLAG_DCB_ENABLED):
mrqc = IXGBE_MRQC_RT8TCEN;
break;
#endif /* CONFIG_IXGBE_DCB */
default:
break;
}
@ -3672,6 +3675,23 @@ static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
/* reconfigure the hardware */
ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
/* Enable RSS Hash per TC */
if (hw->mac.type != ixgbe_mac_82598EB) {
int i;
u32 reg = 0;
for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
u8 msb = 0;
u8 cnt = adapter->netdev->tc_to_txq[i].count;
while (cnt >>= 1)
msb++;
reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
}
IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
}
}
#endif
@ -7343,8 +7363,6 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
IXGBE_FLAG_DCB_ENABLED);
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
#ifdef CONFIG_IXGBE_DCB
netdev->dcbnl_ops = &dcbnl_ops;