[linux-2.6-block.git] / include / rdma / uverbs_named_ioctl.h

/*
 * Copyright (c) 2018, 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_NAMED_IOCTL_
#define _UVERBS_NAMED_IOCTL_

#include <rdma/uverbs_ioctl.h>

#ifndef UVERBS_MODULE_NAME
#error "Please #define UVERBS_MODULE_NAME before including rdma/uverbs_named_ioctl.h"
#endif

#define _UVERBS_PASTE(x, y)	x ## y
#define _UVERBS_NAME(x, y)	_UVERBS_PASTE(x, y)
#define UVERBS_METHOD(id)	_UVERBS_NAME(UVERBS_MODULE_NAME, _method_##id)
#define UVERBS_HANDLER(id)	_UVERBS_NAME(UVERBS_MODULE_NAME, _handler_##id)
#define UVERBS_OBJECT(id)	_UVERBS_NAME(UVERBS_MODULE_NAME, _object_##id)

/* These are static so they do not need to be qualified */
#define UVERBS_METHOD_ATTRS(method_id) _method_attrs_##method_id
#define UVERBS_OBJECT_METHODS(object_id) _object_methods_##object_id

#define DECLARE_UVERBS_NAMED_METHOD(_method_id, ...)                           \
	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
		_method_id)[] = { __VA_ARGS__ };                               \
	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
		.id = _method_id,                                              \
		.handler = UVERBS_HANDLER(_method_id),                         \
		.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
		.attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
	}

/* Create a standard destroy method using the default handler. The handle_attr
 * argument must be the attribute specifying the handle to destroy, the
 * default handler does not support any other attributes.
 */
#define DECLARE_UVERBS_NAMED_METHOD_DESTROY(_method_id, _handle_attr)          \
	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
		_method_id)[] = { _handle_attr };                              \
	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
		.id = _method_id,                                              \
		.handler = uverbs_destroy_def_handler,                         \
		.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
		.attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
	}

#define DECLARE_UVERBS_NAMED_OBJECT(_object_id, _type_attrs, ...)              \
	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
		_object_id)[] = { __VA_ARGS__ };                               \
	const struct uverbs_object_def UVERBS_OBJECT(_object_id) = {           \
		.id = _object_id,                                              \
		.type_attrs = &_type_attrs,                                    \
		.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
		.methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
	}

/*
 * Declare global methods. These still have a unique object_id because we
 * identify all uapi methods with a (object,method) tuple. However, they have
 * no type pointer.
 */
#define DECLARE_UVERBS_GLOBAL_METHODS(_object_id, ...)	\
	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
		_object_id)[] = { __VA_ARGS__ };                               \
	const struct uverbs_object_def UVERBS_OBJECT(_object_id) = {           \
		.id = _object_id,                                              \
		.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
		.methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
	}

/* Used by drivers to declare a complete parsing tree for new methods
 */
#define ADD_UVERBS_METHODS(_name, _object_id, ...)                             \
	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS(    \
		_object_id)[] = { __VA_ARGS__ };                               \
	static const struct uverbs_object_def _name = {                        \
		.id = _object_id,                                              \
		.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)),  \
		.methods = &UVERBS_OBJECT_METHODS(_object_id)                  \
	};

/* Used by drivers to declare a complete parsing tree for a single method that
 * differs only in having additional driver specific attributes.
 */
#define ADD_UVERBS_ATTRIBUTES_SIMPLE(_name, _object_id, _method_id, ...)       \
	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS(        \
		_method_id)[] = { __VA_ARGS__ };                               \
	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = {    \
		.id = _method_id,                                              \
		.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)),      \
		.attrs = &UVERBS_METHOD_ATTRS(_method_id),                     \
	};                                                                     \
	ADD_UVERBS_METHODS(_name, _object_id, &UVERBS_METHOD(_method_id))

#endif
Commit	Line	Data
1f7ff9d5 MB	1	/*
	2	* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
	33	#ifndef _UVERBS_NAMED_IOCTL_
	34	#define _UVERBS_NAMED_IOCTL_
	35
	36	#include <rdma/uverbs_ioctl.h>
	37
	38	#ifndef UVERBS_MODULE_NAME
	39	#error "Please #define UVERBS_MODULE_NAME before including rdma/uverbs_named_ioctl.h"
	40	#endif
	41
	42	#define _UVERBS_PASTE(x, y) x ## y
	43	#define _UVERBS_NAME(x, y) _UVERBS_PASTE(x, y)
	44	#define UVERBS_METHOD(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _method_##id)
	45	#define UVERBS_HANDLER(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _handler_##id)
c471de14	46	#define UVERBS_OBJECT(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _object_##id)
1f7ff9d5	47
6c61d2a5 JG	48	/* These are static so they do not need to be qualified */
	49	#define UVERBS_METHOD_ATTRS(method_id) _method_attrs_##method_id
	50	#define UVERBS_OBJECT_METHODS(object_id) _object_methods_##object_id
1f7ff9d5	51
595c7736 JG	52	#define DECLARE_UVERBS_NAMED_METHOD(_method_id, ...) \
	53	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \
	54	_method_id)[] = { __VA_ARGS__ }; \
	55	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \
	56	.id = _method_id, \
	57	.handler = UVERBS_HANDLER(_method_id), \
	58	.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \
	59	.attrs = &UVERBS_METHOD_ATTRS(_method_id), \
	60	}
1f7ff9d5	61
595c7736 JG	62	/* Create a standard destroy method using the default handler. The handle_attr
	63	* argument must be the attribute specifying the handle to destroy, the
	64	* default handler does not support any other attributes.
	65	*/
	66	#define DECLARE_UVERBS_NAMED_METHOD_DESTROY(_method_id, _handle_attr) \
	67	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \
	68	_method_id)[] = { _handle_attr }; \
	69	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \
	70	.id = _method_id, \
	71	.handler = uverbs_destroy_def_handler, \
	72	.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \
	73	.attrs = &UVERBS_METHOD_ATTRS(_method_id), \
	74	}
1f7ff9d5	75
6c61d2a5 JG	76	#define DECLARE_UVERBS_NAMED_OBJECT(_object_id, _type_attrs, ...) \
	77	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \
	78	_object_id)[] = { __VA_ARGS__ }; \
	79	const struct uverbs_object_def UVERBS_OBJECT(_object_id) = { \
	80	.id = _object_id, \
9a119cd5	81	.type_attrs = &_type_attrs, \
6c61d2a5 JG	82	.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \
	83	.methods = &UVERBS_OBJECT_METHODS(_object_id) \
	84	}
1f7ff9d5	85
9a119cd5 JG	86	/*
	87	* Declare global methods. These still have a unique object_id because we
	88	* identify all uapi methods with a (object,method) tuple. However, they have
	89	* no type pointer.
	90	*/
	91	#define DECLARE_UVERBS_GLOBAL_METHODS(_object_id, ...) \
	92	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \
	93	_object_id)[] = { __VA_ARGS__ }; \
	94	const struct uverbs_object_def UVERBS_OBJECT(_object_id) = { \
	95	.id = _object_id, \
	96	.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \
	97	.methods = &UVERBS_OBJECT_METHODS(_object_id) \
	98	}
e502a864	99
32269441	100	/* Used by drivers to declare a complete parsing tree for new methods
3d64addd	101	*/
32269441	102	#define ADD_UVERBS_METHODS(_name, _object_id, ...) \
6c61d2a5	103	static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \
32269441	104	_object_id)[] = { __VA_ARGS__ }; \
0cbf432d	105	static const struct uverbs_object_def _name = { \
6c61d2a5	106	.id = _object_id, \
32269441	107	.num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \
6c61d2a5	108	.methods = &UVERBS_OBJECT_METHODS(_object_id) \
0cbf432d	109	};
3d64addd	110
32269441 YH	111	/* Used by drivers to declare a complete parsing tree for a single method that
	112	* differs only in having additional driver specific attributes.
	113	*/
	114	#define ADD_UVERBS_ATTRIBUTES_SIMPLE(_name, _object_id, _method_id, ...) \
	115	static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \
	116	_method_id)[] = { __VA_ARGS__ }; \
	117	static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \
	118	.id = _method_id, \
	119	.num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \
	120	.attrs = &UVERBS_METHOD_ATTRS(_method_id), \
	121	}; \
	122	ADD_UVERBS_METHODS(_name, _object_id, &UVERBS_METHOD(_method_id))
	123
1f7ff9d5	124	#endif