net/mlx5: split sample flow into two sub-flows

The flow with sample action will be split into two sub flows:
the prefix sub flow with the all actions preceding the sample
action and sample action itself, and the suffix sub flow with
the actions following the sample action.

The original items remain in the prefix sub flow, add the
implicit tag action with unique id to set in metadata register,
and suffix sub flow uses the tag item to match with that unique id.

The flow split as below:

Original flow: items / actions pre / sample / actions sfx ->
    prefix sub flow -
            items / actions pre / set_tag action / sample
    suffix sub flow -
            tag_item / actions sfx

Signed-off-by: Jiawei Wang <jiaweiw@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

drivers/net/mlx5/mlx5.c

@@ -241,6 +241,17 @@ static const struct mlx5_indexed_pool_config mlx5_ipool_cfg[] = {
 		.free = mlx5_free,
 		.type = "mlx5_jump_ipool",
 	},
+	{
+		.size = sizeof(struct mlx5_flow_dv_sample_resource),
+		.trunk_size = 64,
+		.grow_trunk = 3,
+		.grow_shift = 2,
+		.need_lock = 0,
+		.release_mem_en = 1,
+		.malloc = mlx5_malloc,
+		.free = mlx5_free,
+		.type = "mlx5_sample_ipool",
+	},
 #endif
 	{
 		.size = sizeof(struct mlx5_flow_meter),

drivers/net/mlx5/mlx5.h

@@ -39,6 +39,7 @@ enum mlx5_ipool_index {
 	MLX5_IPOOL_TAG, /* Pool for tag resource. */
 	MLX5_IPOOL_PORT_ID, /* Pool for port id resource. */
 	MLX5_IPOOL_JUMP, /* Pool for jump resource. */
+	MLX5_IPOOL_SAMPLE, /* Pool for sample resource. */
 #endif
 	MLX5_IPOOL_MTR, /* Pool for meter resource. */
 	MLX5_IPOOL_MCP, /* Pool for metadata resource. */
@@ -512,6 +513,7 @@ struct mlx5_flow_tbl_resource {
 #define MLX5_FLOW_TABLE_LEVEL_METER (MLX5_MAX_TABLES - 4)
 #define MLX5_FLOW_TABLE_LEVEL_SUFFIX (MLX5_MAX_TABLES - 3)
 #define MLX5_MAX_TABLES_FDB UINT16_MAX
+#define MLX5_FLOW_TABLE_FACTOR 10
 
 /* ID generation structure. */
 struct mlx5_flow_id_pool {
@@ -640,6 +642,7 @@ struct mlx5_dev_ctx_shared {
 	struct mlx5_hlist *tag_table;
 	uint32_t port_id_action_list; /* List of port ID actions. */
 	uint32_t push_vlan_action_list; /* List of push VLAN actions. */
+	uint32_t sample_action_list; /* List of sample actions. */
 	struct mlx5_flow_counter_mng cmng; /* Counters management structure. */
 	struct mlx5_flow_default_miss_resource default_miss;
 	/* Default miss action resource structure. */