net/mlx5: fs, add HWS actions pool

The HW Steering actions pool will help utilize the option in HW Steering
to share steering actions among different rules.

Create pool on root namespace creation and add few HW Steering actions
that don't depend on the steering rule itself and thus can be shared
between rules, created on same namespace: tag, pop_vlan, push_vlan,
drop, decap l2.

Signed-off-by: Moshe Shemesh <[email protected]>
Reviewed-by: Yevgeny Kliteynik <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: mosheshemesh2

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c

@@ -9,9 +9,60 @@
 #define MLX5HWS_CTX_MAX_NUM_OF_QUEUES 16
 #define MLX5HWS_CTX_QUEUE_SIZE 256
 
+static int mlx5_fs_init_hws_actions_pool(struct mlx5_fs_hws_context *fs_ctx)
+{
+	u32 flags = MLX5HWS_ACTION_FLAG_HWS_FDB | MLX5HWS_ACTION_FLAG_SHARED;
+	struct mlx5_fs_hws_actions_pool *hws_pool = &fs_ctx->hws_pool;
+	struct mlx5hws_action_reformat_header reformat_hdr = {};
+	struct mlx5hws_context *ctx = fs_ctx->hws_ctx;
+	enum mlx5hws_action_type action_type;
+
+	hws_pool->tag_action = mlx5hws_action_create_tag(ctx, flags);
+	if (!hws_pool->tag_action)
+		return -ENOSPC;
+	hws_pool->pop_vlan_action = mlx5hws_action_create_pop_vlan(ctx, flags);
+	if (!hws_pool->pop_vlan_action)
+		goto destroy_tag;
+	hws_pool->push_vlan_action = mlx5hws_action_create_push_vlan(ctx, flags);
+	if (!hws_pool->push_vlan_action)
+		goto destroy_pop_vlan;
+	hws_pool->drop_action = mlx5hws_action_create_dest_drop(ctx, flags);
+	if (!hws_pool->drop_action)
+		goto destroy_push_vlan;
+	action_type = MLX5HWS_ACTION_TYP_REFORMAT_TNL_L2_TO_L2;
+	hws_pool->decapl2_action =
+		mlx5hws_action_create_reformat(ctx, action_type, 1,
+					       &reformat_hdr, 0, flags);
+	if (!hws_pool->decapl2_action)
+		goto destroy_drop;
+	return 0;
+
+destroy_drop:
+	mlx5hws_action_destroy(hws_pool->drop_action);
+destroy_push_vlan:
+	mlx5hws_action_destroy(hws_pool->push_vlan_action);
+destroy_pop_vlan:
+	mlx5hws_action_destroy(hws_pool->pop_vlan_action);
+destroy_tag:
+	mlx5hws_action_destroy(hws_pool->tag_action);
+	return -ENOSPC;
+}
+
+static void mlx5_fs_cleanup_hws_actions_pool(struct mlx5_fs_hws_context *fs_ctx)
+{
+	struct mlx5_fs_hws_actions_pool *hws_pool = &fs_ctx->hws_pool;
+
+	mlx5hws_action_destroy(hws_pool->decapl2_action);
+	mlx5hws_action_destroy(hws_pool->drop_action);
+	mlx5hws_action_destroy(hws_pool->push_vlan_action);
+	mlx5hws_action_destroy(hws_pool->pop_vlan_action);
+	mlx5hws_action_destroy(hws_pool->tag_action);
+}
+
 static int mlx5_cmd_hws_create_ns(struct mlx5_flow_root_namespace *ns)
 {
 	struct mlx5hws_context_attr hws_ctx_attr = {};
+	int err;
 
 	hws_ctx_attr.queues = min_t(int, num_online_cpus(),
 				    MLX5HWS_CTX_MAX_NUM_OF_QUEUES);
@@ -23,11 +74,18 @@ static int mlx5_cmd_hws_create_ns(struct mlx5_flow_root_namespace *ns)
 		mlx5_core_err(ns->dev, "Failed to create hws flow namespace\n");
 		return -EINVAL;
 	}
+	err = mlx5_fs_init_hws_actions_pool(&ns->fs_hws_context);
+	if (err) {
+		mlx5_core_err(ns->dev, "Failed to init hws actions pool\n");
+		mlx5hws_context_close(ns->fs_hws_context.hws_ctx);
+		return err;
+	}
 	return 0;
 }
 
 static int mlx5_cmd_hws_destroy_ns(struct mlx5_flow_root_namespace *ns)
 {
+	mlx5_fs_cleanup_hws_actions_pool(&ns->fs_hws_context);
 	return mlx5hws_context_close(ns->fs_hws_context.hws_ctx);
 }
 

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.h

@@ -6,8 +6,17 @@
 
 #include "mlx5hws.h"
 
+struct mlx5_fs_hws_actions_pool {
+	struct mlx5hws_action *tag_action;
+	struct mlx5hws_action *pop_vlan_action;
+	struct mlx5hws_action *push_vlan_action;
+	struct mlx5hws_action *drop_action;
+	struct mlx5hws_action *decapl2_action;
+};
+
 struct mlx5_fs_hws_context {
 	struct mlx5hws_context	*hws_ctx;
+	struct mlx5_fs_hws_actions_pool hws_pool;
 };
 
 struct mlx5_fs_hws_table {