net/mlx5e: Query minimum required header copy during xmit

Add support for query the minimum inline mode from the Firmware.
It is required for correct TX steering according to L3/L4 packet
headers.

Each send queue (SQ) has inline mode that defines the minimal required
headers that needs to be copied into the SQ WQE.
The driver asks the Firmware for the wqe_inline_mode device capability
value.  In case the device capability defined as "vport context" the
driver must check the reported min inline mode from the vport context
before creating its SQs.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 3 deletions

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index d671e4e8e7db..21bc4557b67a 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -536,7 +536,8 @@ struct mlx5_ifc_per_protocol_networking_offload_caps_bits {
         u8         self_lb_en_modifiable[0x1];
         u8         reserved_at_9[0x2];
         u8         max_lso_cap[0x5];
-        u8         reserved_at_10[0x4];
+        u8         reserved_at_10[0x2];
+        u8         wqe_inline_mode[0x2];
         u8         rss_ind_tbl_cap[0x4];
         u8         reg_umr_sq[0x1];
         u8         scatter_fcs[0x1];
@@ -2270,7 +2271,8 @@ struct mlx5_ifc_sqc_bits {
         u8         cd_master[0x1];
         u8         fre[0x1];
         u8         flush_in_error_en[0x1];
-        u8         reserved_at_4[0x4];
+        u8         reserved_at_4[0x1];
+        u8         min_wqe_inline_mode[0x3];
         u8         state[0x4];
         u8         reg_umr[0x1];
         u8         reserved_at_d[0x13];
@@ -2367,7 +2369,9 @@ struct mlx5_ifc_rmpc_bits {
 };
 
 struct mlx5_ifc_nic_vport_context_bits {
-        u8         reserved_at_0[0x1f];
+        u8         reserved_at_0[0x5];
+        u8         min_wqe_inline_mode[0x3];
+        u8         reserved_at_8[0x17];
         u8         roce_en[0x1];
 
         u8         arm_change_event[0x1];
diff --git a/include/linux/mlx5/vport.h b/include/linux/mlx5/vport.h
index 6c16c198f680..e087b7d047ac 100644
--- a/include/linux/mlx5/vport.h
+++ b/include/linux/mlx5/vport.h
@@ -43,6 +43,8 @@ int mlx5_modify_vport_admin_state(struct mlx5_core_dev *mdev, u8 opmod,
                                   u16 vport, u8 state);
 int mlx5_query_nic_vport_mac_address(struct mlx5_core_dev *mdev,
                                      u16 vport, u8 *addr);
+void mlx5_query_nic_vport_min_inline(struct mlx5_core_dev *mdev,
+                                     u8 *min_inline);
 int mlx5_modify_nic_vport_mac_address(struct mlx5_core_dev *dev,
                                       u16 vport, u8 *addr);
 int mlx5_query_nic_vport_mtu(struct mlx5_core_dev *mdev, u16 *mtu);