IB/mlx5: Enable driver uapi commands for flow steering

Expose the mlx5 flow steering parsing trees, exposing the functionality to
user space.

Signed-off-by: Yishai Hadas <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

Author: yishaih

drivers/infiniband/hw/mlx5/flow.c

@@ -242,3 +242,13 @@ DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_FLOW_MATCHER,
 
 DECLARE_UVERBS_OBJECT_TREE(flow_objects,
 			   &UVERBS_OBJECT(MLX5_IB_OBJECT_FLOW_MATCHER));
+
+int mlx5_ib_get_flow_trees(const struct uverbs_object_tree_def **root)
+{
+	int i = 0;
+
+	root[i++] = &flow_objects;
+	root[i++] = &mlx5_ib_fs;
+
+	return i;
+}

drivers/infiniband/hw/mlx5/main.c

@@ -5535,7 +5535,7 @@ ADD_UVERBS_ATTRIBUTES_SIMPLE(
 			   UVERBS_ATTR_TYPE(u64),
 			   UA_MANDATORY));
 
-#define NUM_TREES	3
+#define NUM_TREES	5
 static int populate_specs_root(struct mlx5_ib_dev *dev)
 {
 	const struct uverbs_object_tree_def *default_root[NUM_TREES + 1] = {
@@ -5555,6 +5555,8 @@ static int populate_specs_root(struct mlx5_ib_dev *dev)
 	    !WARN_ON(num_trees >= ARRAY_SIZE(default_root)))
 		default_root[num_trees++] = mlx5_ib_get_devx_tree();
 
+	num_trees += mlx5_ib_get_flow_trees(default_root + num_trees);
+
 	dev->ib_dev.driver_specs_root =
 		uverbs_alloc_spec_tree(num_trees, default_root);
 

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -1236,6 +1236,7 @@ struct mlx5_ib_flow_handler *mlx5_ib_raw_fs_rule_add(
 	struct mlx5_ib_dev *dev, struct mlx5_ib_flow_matcher *fs_matcher,
 	void *cmd_in, int inlen, int dest_id, int dest_type);
 bool mlx5_ib_devx_is_flow_dest(void *obj, int *dest_id, int *dest_type);
+int mlx5_ib_get_flow_trees(const struct uverbs_object_tree_def **root);
 #else
 static inline int
 mlx5_ib_devx_create(struct mlx5_ib_dev *dev,
@@ -1244,17 +1245,16 @@ static inline void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev,
 					struct mlx5_ib_ucontext *context) {}
 static inline const struct uverbs_object_tree_def *
 mlx5_ib_get_devx_tree(void) { return NULL; }
-static inline struct mlx5_ib_flow_handler *mlx5_ib_raw_fs_rule_add(
-	struct mlx5_ib_dev *dev, struct mlx5_ib_flow_matcher *fs_matcher,
-	void *cmd_in, int inlen, int dest_id, int dest_type)
-{
-	return ERR_PTR(-EOPNOTSUPP);
-}
 static inline bool mlx5_ib_devx_is_flow_dest(void *obj, int *dest_id,
 					     int *dest_type)
 {
 	return false;
 }
+static inline int
+mlx5_ib_get_flow_trees(const struct uverbs_object_tree_def **root)
+{
+	return 0;
+}
 #endif
 static inline void init_query_mad(struct ib_smp *mad)
 {