net/ixgbe: disable NFS filtering

Disable NFS header filtering whether NFS packets coalescing are
required or not, in order to make RSS can work on NFS packets.

The code without the patch does follow datasheet, but not consistent
with the ixgbe kernel driver. It causes NFS packets to be filtered
and make them flow into queue 0, before RSS can work on them.

Fixes: b826efba6de4 ("net/ixgbe: align register setting when RSC is disabled")
Fixes: 8eecb3295aed ("ixgbe: add LRO support")
Cc: stable@dpdk.org
Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
Acked-by: Jeff Guo <jia.guo@intel.com>

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 36e6ca9..72d27f3 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -4923,15 +4923,11 @@ ixgbe_set_rsc(struct rte_eth_dev *dev)
        /* RFCTL configuration  */
        rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
        if ((rsc_capable) && (rx_conf->offloads & DEV_RX_OFFLOAD_TCP_LRO))
-               /*
-                * Since NFS packets coalescing is not supported - clear
-                * RFCTL.NFSW_DIS and RFCTL.NFSR_DIS when RSC is
-                * enabled.
-                */
-               rfctl &= ~(IXGBE_RFCTL_RSC_DIS | IXGBE_RFCTL_NFSW_DIS |
-                          IXGBE_RFCTL_NFSR_DIS);
+               rfctl &= ~IXGBE_RFCTL_RSC_DIS;
        else
                rfctl |= IXGBE_RFCTL_RSC_DIS;
+       /* disable NFS filtering */
+       rfctl |= IXGBE_RFCTL_NFSW_DIS | IXGBE_RFCTL_NFSR_DIS;
        IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
 
        /* If LRO hasn't been requested - we are done here. */