mlx4_en: UDP RSS support

Adding capability for RSS for UDP traffic, hashing is done based on
IP addresses and UDP port number.
The support depends on HW/FW capabilities.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 7 deletions

diff --git a/drivers/net/mlx4/en_main.c b/drivers/net/mlx4/en_main.c
index cacac4e966ee..143906417048 100644
--- a/drivers/net/mlx4/en_main.c
+++ b/drivers/net/mlx4/en_main.c
@@ -63,11 +63,12 @@ static const char mlx4_en_version[] =
  */
 
 
-/* Use a XOR rathern than Toeplitz hash function for RSS */
-MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
-
-/* RSS hash type mask - default to <saddr, daddr, sport, dport> */
-MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
+/* Enable RSS TCP traffic */
+MLX4_EN_PARM_INT(tcp_rss, 1,
+                 "Enable RSS for incomming TCP traffic or disabled (0)");
+/* Enable RSS UDP traffic */
+MLX4_EN_PARM_INT(udp_rss, 1,
+                 "Enable RSS for incomming UDP traffic or disabled (0)");
 
 /* Priority pausing */
 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
@@ -103,8 +104,12 @@ static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
         struct mlx4_en_profile *params = &mdev->profile;
         int i;
 
-        params->rss_xor = (rss_xor != 0);
-        params->rss_mask = rss_mask & 0x1f;
+        params->tcp_rss = tcp_rss;
+        params->udp_rss = udp_rss;
+        if (params->udp_rss && !mdev->dev->caps.udp_rss) {
+                mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
+                params->udp_rss = 0;
+        }
         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
                 params->prof[i].rx_pause = 1;
                 params->prof[i].rx_ppp = pfcrx;