net/mlx5e: Expose catastrophic steering error counters

Add generated_pkt_steering_fail and handled_pkt_steering_fail to devlink
heatlth reporter.
generated_pkt_steering_fail indicates the number of packets dropped due to
illegal steering operation within the vport steering domain.
handled_pkt_steering_fail indicates the number of packets dropped due to
illegal steering operation, originated by the vport.

Also, update devlink reporter functionality documentation with the newly
exposed counters.

Signed-off-by: Lama Kayal <lkayal@nvidia.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst

@@ -290,6 +290,13 @@ Description of the vnic counters:
 - nic_receive_steering_discard
         number of packets that completed RX flow
         steering but were discarded due to a mismatch in flow table.
+- generated_pkt_steering_fail
+	number of packets generated by the VNIC experiencing unexpected steering
+	failure (at any point in steering flow).
+- handled_pkt_steering_fail
+	number of packets handled by the VNIC experiencing unexpected steering
+	failure (at any point in steering flow owned by the VNIC, including the FDB
+	for the eswitch owner).
 
 User commands examples:
 

drivers/net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c

@@ -76,6 +76,16 @@ int mlx5_reporter_vnic_diagnose_counters(struct mlx5_core_dev *dev,
 	if (err)
 		return err;
 
+	err = devlink_fmsg_u64_pair_put(fmsg, "generated_pkt_steering_fail",
+					VNIC_ENV_GET64(&vnic, generated_pkt_steering_fail));
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u64_pair_put(fmsg, "handled_pkt_steering_fail",
+					VNIC_ENV_GET64(&vnic, handled_pkt_steering_fail));
+	if (err)
+		return err;
+
 	err = devlink_fmsg_obj_nest_end(fmsg);
 	if (err)
 		return err;

include/linux/mlx5/mlx5_ifc.h

@@ -1755,7 +1755,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 	u8         reserved_at_328[0x2];
 	u8	   relaxed_ordering_read[0x1];
 	u8         log_max_pd[0x5];
-	u8         reserved_at_330[0x9];
+	u8         reserved_at_330[0x7];
+	u8         vnic_env_cnt_steering_fail[0x1];
+	u8         reserved_at_338[0x1];
 	u8         q_counter_aggregation[0x1];
 	u8         q_counter_other_vport[0x1];
 	u8         log_max_xrcd[0x5];
@@ -3673,7 +3675,13 @@ struct mlx5_ifc_vnic_diagnostic_statistics_bits {
 
 	u8         eth_wqe_too_small[0x20];
 
-	u8         reserved_at_220[0xdc0];
+	u8         reserved_at_220[0xc0];
+
+	u8         generated_pkt_steering_fail[0x40];
+
+	u8         handled_pkt_steering_fail[0x40];
+
+	u8         reserved_at_360[0xc80];
 };
 
 struct mlx5_ifc_traffic_counter_bits {