i40e: Change the notion of src and dst for FD_SB in ethtool

In XL710 devices we program FD filter's fields from Tx perspective of the flow.
However the user interface exposed in ethtool should be compliant with the
previous generation of drivers where a filter src and dst field are from
the RX perspective. This patch changes the ethtool interface in this regard
to match the other drivers.

Change-ID: Iec6ccddd87357c4fb53ccf33aa0fae699faf70cf
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

2 files changed, 16 insertions, 8 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 2af28fd37bff..fc1bd1094397 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -159,6 +159,7 @@ struct i40e_fdir_filter {
         /* filter ipnut set */
         u8 flow_type;
         u8 ip4_proto;
+        /* TX packet view of src and dst */
         __be32 dst_ip[4];
         __be32 src_ip[4];
         __be16 src_port;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index b16c25111552..c7718631ed02 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -1249,10 +1249,13 @@ static int i40e_get_ethtool_fdir_entry(struct i40e_pf *pf,
                 fsp->m_u.usr_ip4_spec.proto = 0;
         }
 
-        fsp->h_u.tcp_ip4_spec.psrc = rule->src_port;
-        fsp->h_u.tcp_ip4_spec.pdst = rule->dst_port;
-        fsp->h_u.tcp_ip4_spec.ip4src = rule->src_ip[0];
-        fsp->h_u.tcp_ip4_spec.ip4dst = rule->dst_ip[0];
+        /* Reverse the src and dest notion, since the HW views them from
+         * Tx perspective where as the user expects it from Rx filter view.
+         */
+        fsp->h_u.tcp_ip4_spec.psrc = rule->dst_port;
+        fsp->h_u.tcp_ip4_spec.pdst = rule->src_port;
+        fsp->h_u.tcp_ip4_spec.ip4src = rule->dst_ip[0];
+        fsp->h_u.tcp_ip4_spec.ip4dst = rule->src_ip[0];
         fsp->ring_cookie = rule->q_index;
 
         return 0;
@@ -1581,10 +1584,14 @@ static int i40e_add_fdir_ethtool(struct i40e_vsi *vsi,
         input->cnt_index = 0;
         input->flow_type = fsp->flow_type;
         input->ip4_proto = fsp->h_u.usr_ip4_spec.proto;
-        input->src_port = fsp->h_u.tcp_ip4_spec.psrc;
-        input->dst_port = fsp->h_u.tcp_ip4_spec.pdst;
-        input->src_ip[0] = fsp->h_u.tcp_ip4_spec.ip4src;
-        input->dst_ip[0] = fsp->h_u.tcp_ip4_spec.ip4dst;
+
+        /* Reverse the src and dest notion, since the HW expects them to be from
+         * Tx perspective where as the input from user is from Rx filter view.
+         */
+        input->dst_port = fsp->h_u.tcp_ip4_spec.psrc;
+        input->src_port = fsp->h_u.tcp_ip4_spec.pdst;
+        input->dst_ip[0] = fsp->h_u.tcp_ip4_spec.ip4src;
+        input->src_ip[0] = fsp->h_u.tcp_ip4_spec.ip4dst;
 
         ret = i40e_add_del_fdir(vsi, input, true);
         if (ret)