net/mlx5: Set number of allowed levels in priority

Refactors the flow steering namespace creation,
by changing the name num_fts to num_levels.
When new flow table is created, the driver assign new level
to this flow table therefore the meaning is equivalent.
Since downstream patches will introduce the ability to create more
than one flow table per level, the name num_fts is no
longer accurate.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -40,18 +40,18 @@
 #define INIT_TREE_NODE_ARRAY_SIZE(...)	(sizeof((struct init_tree_node[]){__VA_ARGS__}) /\
 					 sizeof(struct init_tree_node))
 
-#define ADD_PRIO(num_prios_val, min_level_val, max_ft_val, caps_val,\
+#define ADD_PRIO(num_prios_val, min_level_val, num_levels_val, caps_val,\
 		 ...) {.type = FS_TYPE_PRIO,\
 	.min_ft_level = min_level_val,\
-	.max_ft = max_ft_val,\
+	.num_levels = num_levels_val,\
 	.num_leaf_prios = num_prios_val,\
 	.caps = caps_val,\
 	.children = (struct init_tree_node[]) {__VA_ARGS__},\
 	.ar_size = INIT_TREE_NODE_ARRAY_SIZE(__VA_ARGS__) \
 }
 
-#define ADD_MULTIPLE_PRIO(num_prios_val, max_ft_val, ...)\
-	ADD_PRIO(num_prios_val, 0, max_ft_val, {},\
+#define ADD_MULTIPLE_PRIO(num_prios_val, num_levels_val, ...)\
+	ADD_PRIO(num_prios_val, 0, num_levels_val, {},\
 		 __VA_ARGS__)\
 
 #define ADD_NS(...) {.type = FS_TYPE_NAMESPACE,\
@@ -67,17 +67,18 @@
 #define FS_REQUIRED_CAPS(...) {.arr_sz = INIT_CAPS_ARRAY_SIZE(__VA_ARGS__), \
 			       .caps = (long[]) {__VA_ARGS__} }
 
-#define LEFTOVERS_MAX_FT 1
+#define LEFTOVERS_NUM_LEVELS 1
 #define LEFTOVERS_NUM_PRIOS 1
-#define BY_PASS_PRIO_MAX_FT 1
-#define BY_PASS_MIN_LEVEL (KENREL_MIN_LEVEL + MLX5_BY_PASS_NUM_PRIOS +\
-			   LEFTOVERS_MAX_FT)
 
-#define KERNEL_MAX_FT 3
+#define BY_PASS_PRIO_NUM_LEVELS 1
+#define BY_PASS_MIN_LEVEL (KERNEL_MIN_LEVEL + MLX5_BY_PASS_NUM_PRIOS +\
+			   LEFTOVERS_NUM_PRIOS)
+
+#define KERNEL_NUM_LEVELS 3
 #define KERNEL_NUM_PRIOS 2
-#define KENREL_MIN_LEVEL 2
+#define KERNEL_MIN_LEVEL 2
 
-#define ANCHOR_MAX_FT 1
+#define ANCHOR_NUM_LEVELS 1
 #define ANCHOR_NUM_PRIOS 1
 #define ANCHOR_MIN_LEVEL (BY_PASS_MIN_LEVEL + 1)
 struct node_caps {
@@ -92,7 +93,7 @@ static struct init_tree_node {
 	int min_ft_level;
 	int num_leaf_prios;
 	int prio;
-	int max_ft;
+	int num_levels;
 } root_fs = {
 	.type = FS_TYPE_NAMESPACE,
 	.ar_size = 4,
@@ -102,17 +103,19 @@ static struct init_tree_node {
 					  FS_CAP(flow_table_properties_nic_receive.modify_root),
 					  FS_CAP(flow_table_properties_nic_receive.identified_miss_table_mode),
 					  FS_CAP(flow_table_properties_nic_receive.flow_table_modify)),
-			 ADD_NS(ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS, BY_PASS_PRIO_MAX_FT))),
-		ADD_PRIO(0, KENREL_MIN_LEVEL, 0, {},
-			 ADD_NS(ADD_MULTIPLE_PRIO(KERNEL_NUM_PRIOS, KERNEL_MAX_FT))),
+			 ADD_NS(ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
+						  BY_PASS_PRIO_NUM_LEVELS))),
+		ADD_PRIO(0, KERNEL_MIN_LEVEL, 0, {},
+			 ADD_NS(ADD_MULTIPLE_PRIO(KERNEL_NUM_PRIOS,
+						  KERNEL_NUM_LEVELS))),
 		ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0,
 			 FS_REQUIRED_CAPS(FS_CAP(flow_table_properties_nic_receive.flow_modify_en),
 					  FS_CAP(flow_table_properties_nic_receive.modify_root),
 					  FS_CAP(flow_table_properties_nic_receive.identified_miss_table_mode),
 					  FS_CAP(flow_table_properties_nic_receive.flow_table_modify)),
-			 ADD_NS(ADD_MULTIPLE_PRIO(LEFTOVERS_NUM_PRIOS, LEFTOVERS_MAX_FT))),
+			 ADD_NS(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_MAX_FT))),
+			 ADD_NS(ADD_MULTIPLE_PRIO(ANCHOR_NUM_PRIOS, ANCHOR_NUM_LEVELS))),
 	}
 };
 
@@ -716,7 +719,7 @@ struct mlx5_flow_table *mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
 		err = -EINVAL;
 		goto unlock_root;
 	}
-	if (fs_prio->num_ft == fs_prio->max_ft) {
+	if (fs_prio->num_ft == fs_prio->num_levels) {
 		err = -ENOSPC;
 		goto unlock_root;
 	}
@@ -1311,7 +1314,7 @@ struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
 EXPORT_SYMBOL(mlx5_get_flow_namespace);
 
 static struct fs_prio *fs_create_prio(struct mlx5_flow_namespace *ns,
-				      unsigned prio, int max_ft)
+				      unsigned int prio, int num_levels)
 {
 	struct fs_prio *fs_prio;
 
@@ -1322,7 +1325,7 @@ static struct fs_prio *fs_create_prio(struct mlx5_flow_namespace *ns,
 	fs_prio->node.type = FS_TYPE_PRIO;
 	tree_init_node(&fs_prio->node, 1, NULL);
 	tree_add_node(&fs_prio->node, &ns->node);
-	fs_prio->max_ft = max_ft;
+	fs_prio->num_levels = num_levels;
 	fs_prio->prio = prio;
 	list_add_tail(&fs_prio->node.list, &ns->node.children);
 
@@ -1360,7 +1363,7 @@ static int create_leaf_prios(struct mlx5_flow_namespace *ns, struct init_tree_no
 	int i;
 
 	for (i = 0; i < prio_metadata->num_leaf_prios; i++) {
-		fs_prio = fs_create_prio(ns, i, prio_metadata->max_ft);
+		fs_prio = fs_create_prio(ns, i, prio_metadata->num_levels);
 		if (IS_ERR(fs_prio))
 			return PTR_ERR(fs_prio);
 	}
@@ -1406,7 +1409,7 @@ static int init_root_tree_recursive(struct mlx5_core_dev *dev,
 		fs_get_obj(fs_ns, fs_parent_node);
 		if (init_node->num_leaf_prios)
 			return create_leaf_prios(fs_ns, init_node);
-		fs_prio = fs_create_prio(fs_ns, index, init_node->max_ft);
+		fs_prio = fs_create_prio(fs_ns, index, init_node->num_levels);
 		if (IS_ERR(fs_prio))
 			return PTR_ERR(fs_prio);
 		base = &fs_prio->node;
@@ -1479,9 +1482,9 @@ static int set_prio_attrs_in_ns(struct mlx5_flow_namespace *ns, int acc_level)
 	struct fs_prio *prio;
 
 	fs_for_each_prio(prio, ns) {
-		 /* This updates prio start_level and max_ft */
+		 /* This updates prio start_level and num_levels */
 		set_prio_attrs_in_prio(prio, acc_level);
-		acc_level += prio->max_ft;
+		acc_level += prio->num_levels;
 	}
 	return acc_level;
 }
@@ -1493,11 +1496,11 @@ static void set_prio_attrs_in_prio(struct fs_prio *prio, int acc_level)
 
 	prio->start_level = acc_level;
 	fs_for_each_ns(ns, prio)
-		/* This updates start_level and max_ft of ns's priority descendants */
+		/* This updates start_level and num_levels of ns's priority descendants */
 		acc_level_ns = set_prio_attrs_in_ns(ns, acc_level);
-	if (!prio->max_ft)
-		prio->max_ft = acc_level_ns - prio->start_level;
-	WARN_ON(prio->max_ft < acc_level_ns - prio->start_level);
+	if (!prio->num_levels)
+		prio->num_levels = acc_level_ns - prio->start_level;
+	WARN_ON(prio->num_levels < acc_level_ns - prio->start_level);
 }
 
 static void set_prio_attrs(struct mlx5_flow_root_namespace *root_ns)
@@ -1508,7 +1511,7 @@ static void set_prio_attrs(struct mlx5_flow_root_namespace *root_ns)
 
 	fs_for_each_prio(prio, ns) {
 		set_prio_attrs_in_prio(prio, start_level);
-		start_level += prio->max_ft;
+		start_level += prio->num_levels;
 	}
 }
 

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

@@ -107,7 +107,7 @@ struct fs_fte {
 /* Type of children is mlx5_flow_table/namespace */
 struct fs_prio {
 	struct fs_node			node;
-	unsigned int			max_ft;
+	unsigned int			num_levels;
 	unsigned int			start_level;
 	unsigned int			prio;
 	unsigned int			num_ft;