i40e/i40evf: Remove VF Rx csum offload for tunneled packets

Rx checksum offload for tunneled packets was never being negotiated or
requested by VF. This capability was assumed by default and enabled in
current hardware for VF. Going forward, this feature needs to be disabled
or advanced ptypes should be negotiated with PF in the future.

Change-ID: I9e54cfa8a90e03ab6956db4412f1e337ccd2c2e0
Signed-off-by: Preethi Banala <preethi.banala@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 26785018
(cherry picked from commit 53240e99dbbfe69a6b3ca808a6d15eea744be169)
Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Reviewed-by: Kyle Fortin <kyle.fortin@oracle.com>

diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
index 0dc4541569a1dadd0e19b41fa7a12e72fe1f840f..4112fa0a07ee927fb0a6d99d1789c4197e58640c 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
@@ -819,19 +819,16 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi,
        if (rx_error & BIT(I40E_RX_DESC_ERROR_PPRS_SHIFT))
                return;
 
-       /* The hardware supported by this driver does not validate outer
-        * checksums for tunneled VXLAN or GENEVE frames.  I don't agree
-        * with it but the specification states that you "MAY validate", it
-        * doesn't make it a hard requirement so if we have validated the
-        * inner checksum report CHECKSUM_UNNECESSARY.
-        */
-       if (decoded.inner_prot & (I40E_RX_PTYPE_INNER_PROT_TCP |
-                                 I40E_RX_PTYPE_INNER_PROT_UDP |
-                                 I40E_RX_PTYPE_INNER_PROT_SCTP))
-               tunnel = true;
-
-       skb->ip_summed = CHECKSUM_UNNECESSARY;
-       skb->csum_level = tunnel ? 1 : 0;
+       /* Only report checksum unnecessary for TCP, UDP, or SCTP */
+       switch (decoded.inner_prot) {
+       case I40E_RX_PTYPE_INNER_PROT_TCP:
+       case I40E_RX_PTYPE_INNER_PROT_UDP:
+       case I40E_RX_PTYPE_INNER_PROT_SCTP:
+               skb->ip_summed = CHECKSUM_UNNECESSARY;
+               /* fall though */
+       default:
+               break;
+       }
 
        return;