net/mlx5: Add per-namespace flow table default miss action support

Currently all the namespaces under the same steering domain share the same
default table miss action, however in some situations (e.g., RDMA RX)
different actions are required. This patch adds a per-namespace default
table miss action instead of using the miss action of the steering domain.
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

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

@@ -182,7 +182,7 @@ static int mlx5_cmd_create_flow_table(struct mlx5_flow_root_namespace *ns,
 		} else {
 			MLX5_SET(create_flow_table_in, in,
 				 flow_table_context.table_miss_action,
-				 ns->def_miss_action);
+				 ft->def_miss_action);
 		}
 		break;
 
@@ -262,7 +262,7 @@ static int mlx5_cmd_modify_flow_table(struct mlx5_flow_root_namespace *ns,
 		} else {
 			MLX5_SET(modify_flow_table_in, in,
 				 flow_table_context.table_miss_action,
-				 ns->def_miss_action);
+				 ft->def_miss_action);
 		}
 	}
 

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

@@ -60,7 +60,8 @@
 	ADD_PRIO(num_prios_val, 0, num_levels_val, {},\
 		 __VA_ARGS__)\
 
-#define ADD_NS(...) {.type = FS_TYPE_NAMESPACE,\
+#define ADD_NS(def_miss_act, ...) {.type = FS_TYPE_NAMESPACE,	\
+	.def_miss_action = def_miss_act,\
 	.children = (struct init_tree_node[]) {__VA_ARGS__},\
 	.ar_size = INIT_TREE_NODE_ARRAY_SIZE(__VA_ARGS__) \
 }
@@ -131,33 +132,41 @@ static struct init_tree_node {
 	int num_leaf_prios;
 	int prio;
 	int num_levels;
+	enum mlx5_flow_table_miss_action def_miss_action;
 } root_fs = {
 	.type = FS_TYPE_NAMESPACE,
 	.ar_size = 7,
-	.children = (struct init_tree_node[]) {
-		ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0,
-			 FS_CHAINING_CAPS,
-			 ADD_NS(ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
+	  .children = (struct init_tree_node[]){
+		  ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0, FS_CHAINING_CAPS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
 						    BY_PASS_PRIO_NUM_LEVELS))),
-		ADD_PRIO(0, LAG_MIN_LEVEL, 0,
-			 FS_CHAINING_CAPS,
-			 ADD_NS(ADD_MULTIPLE_PRIO(LAG_NUM_PRIOS,
+		  ADD_PRIO(0, LAG_MIN_LEVEL, 0, FS_CHAINING_CAPS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(LAG_NUM_PRIOS,
 						    LAG_PRIO_NUM_LEVELS))),
 		  ADD_PRIO(0, OFFLOADS_MIN_LEVEL, 0, {},
-			 ADD_NS(ADD_MULTIPLE_PRIO(OFFLOADS_NUM_PRIOS, OFFLOADS_MAX_FT))),
-		ADD_PRIO(0, ETHTOOL_MIN_LEVEL, 0,
-			 FS_CHAINING_CAPS,
-			 ADD_NS(ADD_MULTIPLE_PRIO(ETHTOOL_NUM_PRIOS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(OFFLOADS_NUM_PRIOS,
+						    OFFLOADS_MAX_FT))),
+		  ADD_PRIO(0, ETHTOOL_MIN_LEVEL, 0, FS_CHAINING_CAPS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(ETHTOOL_NUM_PRIOS,
 						    ETHTOOL_PRIO_NUM_LEVELS))),
 		  ADD_PRIO(0, KERNEL_MIN_LEVEL, 0, {},
-			 ADD_NS(ADD_MULTIPLE_PRIO(KERNEL_NIC_TC_NUM_PRIOS, KERNEL_NIC_TC_NUM_LEVELS),
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(KERNEL_NIC_TC_NUM_PRIOS,
+						    KERNEL_NIC_TC_NUM_LEVELS),
 				  ADD_MULTIPLE_PRIO(KERNEL_NIC_NUM_PRIOS,
 						    KERNEL_NIC_PRIO_NUM_LEVELS))),
-		ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0,
-			 FS_CHAINING_CAPS,
-			 ADD_NS(ADD_MULTIPLE_PRIO(LEFTOVERS_NUM_PRIOS, LEFTOVERS_NUM_LEVELS))),
+		  ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0, FS_CHAINING_CAPS,
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(LEFTOVERS_NUM_PRIOS,
+						    LEFTOVERS_NUM_LEVELS))),
 		  ADD_PRIO(0, ANCHOR_MIN_LEVEL, 0, {},
-			 ADD_NS(ADD_MULTIPLE_PRIO(ANCHOR_NUM_PRIOS, ANCHOR_NUM_LEVELS))),
+			   ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				  ADD_MULTIPLE_PRIO(ANCHOR_NUM_PRIOS,
+						    ANCHOR_NUM_LEVELS))),
 	}
 };
 
@@ -167,7 +176,8 @@ static struct init_tree_node egress_root_fs = {
 	.children = (struct init_tree_node[]) {
 		ADD_PRIO(0, MLX5_BY_PASS_NUM_PRIOS, 0,
 			 FS_CHAINING_CAPS_EGRESS,
-			 ADD_NS(ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
+			 ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+				ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
 						  BY_PASS_PRIO_NUM_LEVELS))),
 	}
 };
@@ -1014,6 +1024,7 @@ static struct mlx5_flow_table *__mlx5_create_flow_table(struct mlx5_flow_namespa
 	tree_init_node(&ft->node, del_hw_flow_table, del_sw_flow_table);
 	log_table_sz = ft->max_fte ? ilog2(ft->max_fte) : 0;
 	next_ft = find_next_chained_ft(fs_prio);
+	ft->def_miss_action = ns->def_miss_action;
 	err = root->cmds->create_flow_table(root, ft, log_table_sz, next_ft);
 	if (err)
 		goto free_ft;
@@ -2155,7 +2166,8 @@ static struct mlx5_flow_namespace *fs_init_namespace(struct mlx5_flow_namespace
 	return ns;
 }
 
-static struct mlx5_flow_namespace *fs_create_namespace(struct fs_prio *prio)
+static struct mlx5_flow_namespace *fs_create_namespace(struct fs_prio *prio,
+						       int def_miss_act)
 {
 	struct mlx5_flow_namespace	*ns;
 
@@ -2164,6 +2176,7 @@ static struct mlx5_flow_namespace *fs_create_namespace(struct fs_prio *prio)
 		return ERR_PTR(-ENOMEM);
 
 	fs_init_namespace(ns);
+	ns->def_miss_action = def_miss_act;
 	tree_init_node(&ns->node, NULL, del_sw_ns);
 	tree_add_node(&ns->node, &prio->node);
 	list_add_tail(&ns->node.list, &prio->node.children);
@@ -2230,7 +2243,7 @@ static int init_root_tree_recursive(struct mlx5_flow_steering *steering,
 		base = &fs_prio->node;
 	} else if (init_node->type == FS_TYPE_NAMESPACE) {
 		fs_get_obj(fs_prio, fs_parent_node);
-		fs_ns = fs_create_namespace(fs_prio);
+		fs_ns = fs_create_namespace(fs_prio, init_node->def_miss_action);
 		if (IS_ERR(fs_ns))
 			return PTR_ERR(fs_ns);
 		base = &fs_ns->node;
@@ -2500,7 +2513,7 @@ static int init_rdma_rx_root_ns(struct mlx5_flow_steering *steering)
 	if (!steering->rdma_rx_root_ns)
 		return -ENOMEM;
 
-	steering->rdma_rx_root_ns->def_miss_action =
+	steering->rdma_rx_root_ns->ns.def_miss_action =
 		MLX5_FLOW_TABLE_MISS_ACTION_SWITCH_DOMAIN;
 
 	/* Create single prio */
@@ -2543,7 +2556,7 @@ static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
 	}
 
 	for (chain = 0; chain <= FDB_MAX_CHAIN; chain++) {
-		ns = fs_create_namespace(maj_prio);
+		ns = fs_create_namespace(maj_prio, MLX5_FLOW_TABLE_MISS_ACTION_DEF);
 		if (IS_ERR(ns)) {
 			err = PTR_ERR(ns);
 			goto out_err;

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

@@ -145,6 +145,7 @@ struct mlx5_flow_table {
 	struct list_head		fwd_rules;
 	u32				flags;
 	struct rhltable			fgs_hash;
+	enum mlx5_flow_table_miss_action def_miss_action;
 };
 
 struct mlx5_ft_underlay_qp {
@@ -191,6 +192,7 @@ struct fs_prio {
 struct mlx5_flow_namespace {
 	/* parent == NULL => root ns */
 	struct	fs_node			node;
+	enum mlx5_flow_table_miss_action def_miss_action;
 };
 
 struct mlx5_flow_group_mask {
@@ -219,7 +221,6 @@ struct mlx5_flow_root_namespace {
 	struct mutex			chain_lock;
 	struct list_head		underlay_qpns;
 	const struct mlx5_flow_cmds	*cmds;
-	enum mlx5_flow_table_miss_action def_miss_action;
 };
 
 int mlx5_init_fc_stats(struct mlx5_core_dev *dev);