net/mlx4_core: Add basic support for TCP/IP offloads under tunneling

Add the low-level device commands and definitions used for TCP/IP HW offloads
of tunneled/vxlan traffic which are supported by the ConnectX3-pro NIC.

This is done through the following elements:

 - read tunneling device caps in QUERY_DEV_CAP
 - add helper function to do SET_PORT for tunneling
 - add DMFS VXLAN steering rule definitions
 - add CQE and WQE checksum offload field definitions

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mlx4/cq.h b/include/linux/mlx4/cq.h
index 98fa492cf406..5dd0d70a0689 100644
--- a/include/linux/mlx4/cq.h
+++ b/include/linux/mlx4/cq.h
@@ -81,7 +81,12 @@ struct mlx4_ts_cqe {
 } __packed;
 
 enum {
+        MLX4_CQE_L2_TUNNEL_IPOK         = 1 << 31,
         MLX4_CQE_VLAN_PRESENT_MASK      = 1 << 29,
+        MLX4_CQE_L2_TUNNEL              = 1 << 27,
+        MLX4_CQE_L2_TUNNEL_CSUM         = 1 << 26,
+        MLX4_CQE_L2_TUNNEL_IPV4         = 1 << 25,
+
         MLX4_CQE_QPN_MASK               = 0xffffff,
 };