include/rdma/uverbs_std_types.h

/*
 * Copyright (c) 2017, Mellanox Technologies inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _UVERBS_STD_TYPES__
#define _UVERBS_STD_TYPES__

#include <rdma/uverbs_types.h>
#include <rdma/uverbs_ioctl.h>
#include <rdma/ib_user_ioctl_verbs.h>

#define UVERBS_OBJECT(id)	uverbs_object_##id

#if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
const struct uverbs_object_tree_def *uverbs_default_get_objects(void);
#else
static inline const struct uverbs_object_tree_def *uverbs_default_get_objects(void)
{
	return NULL;
}
#endif

static inline struct ib_uobject *__uobj_get(const struct uverbs_obj_type *type,
					    bool write,
					    struct ib_ucontext *ucontext,
					    int id)
{
	return rdma_lookup_get_uobject(type, ucontext, id, write);
}

#define uobj_get_type(_object) UVERBS_OBJECT(_object).type_attrs

#define uobj_get_read(_type, _id, _ucontext)				\
	 __uobj_get(uobj_get_type(_type), false, _ucontext, _id)

#define uobj_get_obj_read(_object, _type, _id, _ucontext)		\
({									\
	struct ib_uobject *__uobj =					\
		__uobj_get(uobj_get_type(_type),			\
			   false, _ucontext, _id);			\
									\
	(struct ib_##_object *)(IS_ERR(__uobj) ? NULL : __uobj->object);\
})

#define uobj_get_write(_type, _id, _ucontext)				\
	 __uobj_get(uobj_get_type(_type), true, _ucontext, _id)

static inline void uobj_put_read(struct ib_uobject *uobj)
{
	rdma_lookup_put_uobject(uobj, false);
}

#define uobj_put_obj_read(_obj)					\
	uobj_put_read((_obj)->uobject)

static inline void uobj_put_write(struct ib_uobject *uobj)
{
	rdma_lookup_put_uobject(uobj, true);
}

static inline int __must_check uobj_remove_commit(struct ib_uobject *uobj)
{
	return rdma_remove_commit_uobject(uobj);
}

static inline void uobj_alloc_commit(struct ib_uobject *uobj)
{
	rdma_alloc_commit_uobject(uobj);
}

static inline void uobj_alloc_abort(struct ib_uobject *uobj)
{
	rdma_alloc_abort_uobject(uobj);
}

static inline struct ib_uobject *__uobj_alloc(const struct uverbs_obj_type *type,
					      struct ib_ucontext *ucontext)
{
	return rdma_alloc_begin_uobject(type, ucontext);
}

#define uobj_alloc(_type, ucontext)	\
	__uobj_alloc(uobj_get_type(_type), ucontext)

#endif