net/mlx5: Add priorities for counters in RDMA namespaces

Add additional flow steering priorities in the RDMA namespace.
This allows adding flow counters to count filtered RDMA traffic and then
continue processing in the regular RDMA steering flow.

Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

@@ -99,6 +99,9 @@
 #define LEFTOVERS_NUM_LEVELS 1
 #define LEFTOVERS_NUM_PRIOS 1
 
+#define RDMA_RX_COUNTERS_PRIO_NUM_LEVELS 1
+#define RDMA_TX_COUNTERS_PRIO_NUM_LEVELS 1
+
 #define BY_PASS_PRIO_NUM_LEVELS 1
 #define BY_PASS_MIN_LEVEL (ETHTOOL_MIN_LEVEL + MLX5_BY_PASS_NUM_PRIOS +\
 			   LEFTOVERS_NUM_PRIOS)
@@ -206,34 +209,63 @@ static struct init_tree_node egress_root_fs = {
 	}
 };
 
-#define RDMA_RX_BYPASS_PRIO 0
-#define RDMA_RX_KERNEL_PRIO 1
+enum {
+	RDMA_RX_COUNTERS_PRIO,
+	RDMA_RX_BYPASS_PRIO,
+	RDMA_RX_KERNEL_PRIO,
+};
+
+#define RDMA_RX_BYPASS_MIN_LEVEL MLX5_BY_PASS_NUM_REGULAR_PRIOS
+#define RDMA_RX_KERNEL_MIN_LEVEL (RDMA_RX_BYPASS_MIN_LEVEL + 1)
+#define RDMA_RX_COUNTERS_MIN_LEVEL (RDMA_RX_KERNEL_MIN_LEVEL + 2)
+
 static struct init_tree_node rdma_rx_root_fs = {
 	.type = FS_TYPE_NAMESPACE,
-	.ar_size = 2,
+	.ar_size = 3,
 	.children = (struct init_tree_node[]) {
+		[RDMA_RX_COUNTERS_PRIO] =
+		ADD_PRIO(0, RDMA_RX_COUNTERS_MIN_LEVEL, 0,
+			 FS_CHAINING_CAPS,
+			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				ADD_MULTIPLE_PRIO(MLX5_RDMA_RX_NUM_COUNTERS_PRIOS,
+						  RDMA_RX_COUNTERS_PRIO_NUM_LEVELS))),
 		[RDMA_RX_BYPASS_PRIO] =
-		ADD_PRIO(0, MLX5_BY_PASS_NUM_REGULAR_PRIOS, 0,
+		ADD_PRIO(0, RDMA_RX_BYPASS_MIN_LEVEL, 0,
 			 FS_CHAINING_CAPS,
 			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
 				ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_REGULAR_PRIOS,
 						  BY_PASS_PRIO_NUM_LEVELS))),
 		[RDMA_RX_KERNEL_PRIO] =
-		ADD_PRIO(0, MLX5_BY_PASS_NUM_REGULAR_PRIOS + 1, 0,
+		ADD_PRIO(0, RDMA_RX_KERNEL_MIN_LEVEL, 0,
 			 FS_CHAINING_CAPS,
 			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_SWITCH_DOMAIN,
 				ADD_MULTIPLE_PRIO(1, 1))),
 	}
 };
 
+enum {
+	RDMA_TX_COUNTERS_PRIO,
+	RDMA_TX_BYPASS_PRIO,
+};
+
+#define RDMA_TX_BYPASS_MIN_LEVEL MLX5_BY_PASS_NUM_PRIOS
+#define RDMA_TX_COUNTERS_MIN_LEVEL (RDMA_TX_BYPASS_MIN_LEVEL + 1)
+
 static struct init_tree_node rdma_tx_root_fs = {
 	.type = FS_TYPE_NAMESPACE,
-	.ar_size = 1,
+	.ar_size = 2,
 	.children = (struct init_tree_node[]) {
-		ADD_PRIO(0, MLX5_BY_PASS_NUM_PRIOS, 0,
+		[RDMA_TX_COUNTERS_PRIO] =
+		ADD_PRIO(0, RDMA_TX_COUNTERS_MIN_LEVEL, 0,
+			 FS_CHAINING_CAPS,
+			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				ADD_MULTIPLE_PRIO(MLX5_RDMA_TX_NUM_COUNTERS_PRIOS,
+						  RDMA_TX_COUNTERS_PRIO_NUM_LEVELS))),
+		[RDMA_TX_BYPASS_PRIO] =
+		ADD_PRIO(0, RDMA_TX_BYPASS_MIN_LEVEL, 0,
 			 FS_CHAINING_CAPS_RDMA_TX,
 			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
-				ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
+				ADD_MULTIPLE_PRIO(RDMA_TX_BYPASS_MIN_LEVEL,
 						  BY_PASS_PRIO_NUM_LEVELS))),
 	}
 };
@@ -2215,6 +2247,12 @@ struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
 		prio = RDMA_RX_KERNEL_PRIO;
 	} else if (type == MLX5_FLOW_NAMESPACE_RDMA_TX) {
 		root_ns = steering->rdma_tx_root_ns;
+	} else if (type == MLX5_FLOW_NAMESPACE_RDMA_RX_COUNTERS) {
+		root_ns = steering->rdma_rx_root_ns;
+		prio = RDMA_RX_COUNTERS_PRIO;
+	} else if (type == MLX5_FLOW_NAMESPACE_RDMA_TX_COUNTERS) {
+		root_ns = steering->rdma_tx_root_ns;
+		prio = RDMA_TX_COUNTERS_PRIO;
 	} else { /* Must be NIC RX */
 		root_ns = steering->root_ns;
 		prio = type;

include/linux/mlx5/device.h

@@ -1456,6 +1456,8 @@ static inline u16 mlx5_to_sw_pkey_sz(int pkey_sz)
 	return MLX5_MIN_PKEY_TABLE_SIZE << pkey_sz;
 }
 
+#define MLX5_RDMA_RX_NUM_COUNTERS_PRIOS 2
+#define MLX5_RDMA_TX_NUM_COUNTERS_PRIOS 1
 #define MLX5_BY_PASS_NUM_REGULAR_PRIOS 16
 #define MLX5_BY_PASS_NUM_DONT_TRAP_PRIOS 16
 #define MLX5_BY_PASS_NUM_MULTICAST_PRIOS 1

include/linux/mlx5/fs.h

@@ -83,6 +83,8 @@ enum mlx5_flow_namespace_type {
 	MLX5_FLOW_NAMESPACE_RDMA_RX,
 	MLX5_FLOW_NAMESPACE_RDMA_RX_KERNEL,
 	MLX5_FLOW_NAMESPACE_RDMA_TX,
+	MLX5_FLOW_NAMESPACE_RDMA_RX_COUNTERS,
+	MLX5_FLOW_NAMESPACE_RDMA_TX_COUNTERS,
 };
 
 enum {