[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / uverbs.h

/*
 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
 * Copyright (c) 2005 PathScale, 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_H
#define UVERBS_H

#include <linux/kref.h>
#include <linux/idr.h>
#include <linux/mutex.h>
#include <linux/completion.h>
#include <linux/cdev.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>

/*
 * Our lifetime rules for these structs are the following:
 *
 * struct ib_uverbs_device: One reference is held by the module and
 * released in ib_uverbs_remove_one().  Another reference is taken by
 * ib_uverbs_open() each time the character special file is opened,
 * and released in ib_uverbs_release_file() when the file is released.
 *
 * struct ib_uverbs_file: One reference is held by the VFS and
 * released when the file is closed.  Another reference is taken when
 * an asynchronous event queue file is created and released when the
 * event file is closed.
 *
 * struct ib_uverbs_event_file: One reference is held by the VFS and
 * released when the file is closed.  For asynchronous event files,
 * another reference is held by the corresponding main context file
 * and released when that file is closed.  For completion event files,
 * a reference is taken when a CQ is created that uses the file, and
 * released when the CQ is destroyed.
 */

struct ib_uverbs_device {
	struct kref				ref;
	int					num_comp_vectors;
	struct completion			comp;
	struct device			       *dev;
	struct ib_device		       *ib_dev;
	int					devnum;
	struct cdev			        cdev;
	struct rb_root				xrcd_tree;
	struct mutex				xrcd_tree_mutex;
};

struct ib_uverbs_event_file {
	struct kref				ref;
	int					is_async;
	struct ib_uverbs_file		       *uverbs_file;
	spinlock_t				lock;
	int					is_closed;
	wait_queue_head_t			poll_wait;
	struct fasync_struct		       *async_queue;
	struct list_head			event_list;
};

struct ib_uverbs_file {
	struct kref				ref;
	struct mutex				mutex;
	struct ib_uverbs_device		       *device;
	struct ib_ucontext		       *ucontext;
	struct ib_event_handler			event_handler;
	struct ib_uverbs_event_file	       *async_file;
};

struct ib_uverbs_event {
	union {
		struct ib_uverbs_async_event_desc	async;
		struct ib_uverbs_comp_event_desc	comp;
	}					desc;
	struct list_head			list;
	struct list_head			obj_list;
	u32				       *counter;
};

struct ib_uverbs_mcast_entry {
	struct list_head	list;
	union ib_gid 		gid;
	u16 			lid;
};

struct ib_uevent_object {
	struct ib_uobject	uobject;
	struct list_head	event_list;
	u32			events_reported;
};

struct ib_uxrcd_object {
	struct ib_uobject	uobject;
	atomic_t		refcnt;
};

struct ib_usrq_object {
	struct ib_uevent_object	uevent;
	struct ib_uxrcd_object *uxrcd;
};

struct ib_uqp_object {
	struct ib_uevent_object	uevent;
	struct list_head 	mcast_list;
};

struct ib_ucq_object {
	struct ib_uobject	uobject;
	struct ib_uverbs_file  *uverbs_file;
	struct list_head	comp_list;
	struct list_head	async_list;
	u32			comp_events_reported;
	u32			async_events_reported;
};

extern spinlock_t ib_uverbs_idr_lock;
extern struct idr ib_uverbs_pd_idr;
extern struct idr ib_uverbs_mr_idr;
extern struct idr ib_uverbs_mw_idr;
extern struct idr ib_uverbs_ah_idr;
extern struct idr ib_uverbs_cq_idr;
extern struct idr ib_uverbs_qp_idr;
extern struct idr ib_uverbs_srq_idr;
extern struct idr ib_uverbs_xrcd_idr;

void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj);

struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
					int is_async);
struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);

void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
			   struct ib_uverbs_event_file *ev_file,
			   struct ib_ucq_object *uobj);
void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
			      struct ib_uevent_object *uobj);

void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
void ib_uverbs_event_handler(struct ib_event_handler *handler,
			     struct ib_event *event);
void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd);

#define IB_UVERBS_DECLARE_CMD(name)					\
	ssize_t ib_uverbs_##name(struct ib_uverbs_file *file,		\
				 const char __user *buf, int in_len,	\
				 int out_len)

IB_UVERBS_DECLARE_CMD(get_context);
IB_UVERBS_DECLARE_CMD(query_device);
IB_UVERBS_DECLARE_CMD(query_port);
IB_UVERBS_DECLARE_CMD(alloc_pd);
IB_UVERBS_DECLARE_CMD(dealloc_pd);
IB_UVERBS_DECLARE_CMD(reg_mr);
IB_UVERBS_DECLARE_CMD(dereg_mr);
IB_UVERBS_DECLARE_CMD(create_comp_channel);
IB_UVERBS_DECLARE_CMD(create_cq);
IB_UVERBS_DECLARE_CMD(resize_cq);
IB_UVERBS_DECLARE_CMD(poll_cq);
IB_UVERBS_DECLARE_CMD(req_notify_cq);
IB_UVERBS_DECLARE_CMD(destroy_cq);
IB_UVERBS_DECLARE_CMD(create_qp);
IB_UVERBS_DECLARE_CMD(query_qp);
IB_UVERBS_DECLARE_CMD(modify_qp);
IB_UVERBS_DECLARE_CMD(destroy_qp);
IB_UVERBS_DECLARE_CMD(post_send);
IB_UVERBS_DECLARE_CMD(post_recv);
IB_UVERBS_DECLARE_CMD(post_srq_recv);
IB_UVERBS_DECLARE_CMD(create_ah);
IB_UVERBS_DECLARE_CMD(destroy_ah);
IB_UVERBS_DECLARE_CMD(attach_mcast);
IB_UVERBS_DECLARE_CMD(detach_mcast);
IB_UVERBS_DECLARE_CMD(create_srq);
IB_UVERBS_DECLARE_CMD(modify_srq);
IB_UVERBS_DECLARE_CMD(query_srq);
IB_UVERBS_DECLARE_CMD(destroy_srq);
IB_UVERBS_DECLARE_CMD(create_xsrq);
IB_UVERBS_DECLARE_CMD(open_xrcd);
IB_UVERBS_DECLARE_CMD(close_xrcd);

#endif /* UVERBS_H */
Commit	Line	Data
bc38a6ab RD	1	/*
bc38a6ab RD	2	* Copyright (c) 2005 Topspin Communications. All rights reserved.
33b9b3ee	3	* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
2a1d9b7f RD	4	* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
2a1d9b7f RD	5	* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
67cdb40c	6	* Copyright (c) 2005 PathScale, Inc. All rights reserved.
bc38a6ab RD	7	*
	8	* This software is available to you under a choice of one of two
	9	* licenses. You may choose to be licensed under the terms of the GNU
	10	* General Public License (GPL) Version 2, available from the file
	11	* COPYING in the main directory of this source tree, or the
	12	* OpenIB.org BSD license below:
	13	*
	14	* Redistribution and use in source and binary forms, with or
	15	* without modification, are permitted provided that the following
	16	* conditions are met:
	17	*
	18	* - Redistributions of source code must retain the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer.
	21	*
	22	* - Redistributions in binary form must reproduce the above
	23	* copyright notice, this list of conditions and the following
	24	* disclaimer in the documentation and/or other materials
	25	* provided with the distribution.
	26	*
	27	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	28	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	29	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	30	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	31	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	32	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	33	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	34	* SOFTWARE.
bc38a6ab RD	35	*/
	36
	37	#ifndef UVERBS_H
	38	#define UVERBS_H
	39
bc38a6ab RD	40	#include <linux/kref.h>
bc38a6ab RD	41	#include <linux/idr.h>
95ed644f	42	#include <linux/mutex.h>
fd60ae40	43	#include <linux/completion.h>
055422dd	44	#include <linux/cdev.h>
bc38a6ab	45
a4d61e84	46	#include <rdma/ib_verbs.h>
f7c6a7b5	47	#include <rdma/ib_umem.h>
a4d61e84	48	#include <rdma/ib_user_verbs.h>
bc38a6ab	49
70a30e16 RD	50	/*
	51	* Our lifetime rules for these structs are the following:
	52	*
	53	* struct ib_uverbs_device: One reference is held by the module and
	54	* released in ib_uverbs_remove_one(). Another reference is taken by
	55	* ib_uverbs_open() each time the character special file is opened,
	56	* and released in ib_uverbs_release_file() when the file is released.
	57	*
	58	* struct ib_uverbs_file: One reference is held by the VFS and
	59	* released when the file is closed. Another reference is taken when
	60	* an asynchronous event queue file is created and released when the
	61	* event file is closed.
	62	*
	63	* struct ib_uverbs_event_file: One reference is held by the VFS and
	64	* released when the file is closed. For asynchronous event files,
	65	* another reference is held by the corresponding main context file
	66	* and released when that file is closed. For completion event files,
	67	* a reference is taken when a CQ is created that uses the file, and
	68	* released when the CQ is destroyed.
	69	*/
	70
bc38a6ab	71	struct ib_uverbs_device {
70a30e16	72	struct kref ref;
055422dd	73	int num_comp_vectors;
fd60ae40	74	struct completion comp;
f4e91eb4	75	struct device *dev;
bc38a6ab	76	struct ib_device *ib_dev;
055422dd AC	77	int devnum;
055422dd AC	78	struct cdev cdev;
53d0bd1e SH	79	struct rb_root xrcd_tree;
53d0bd1e SH	80	struct mutex xrcd_tree_mutex;
bc38a6ab RD	81	};
	82
	83	struct ib_uverbs_event_file {
	84	struct kref ref;
830a3871	85	int is_async;
bc38a6ab RD	86	struct ib_uverbs_file *uverbs_file;
bc38a6ab RD	87	spinlock_t lock;
830a3871	88	int is_closed;
bc38a6ab	89	wait_queue_head_t poll_wait;
abdf119b	90	struct fasync_struct *async_queue;
bc38a6ab RD	91	struct list_head event_list;
	92	};
	93
	94	struct ib_uverbs_file {
	95	struct kref ref;
95ed644f	96	struct mutex mutex;
bc38a6ab RD	97	struct ib_uverbs_device *device;
	98	struct ib_ucontext *ucontext;
	99	struct ib_event_handler event_handler;
6b73597e	100	struct ib_uverbs_event_file *async_file;
bc38a6ab RD	101	};
bc38a6ab RD	102
63aaf647 RD	103	struct ib_uverbs_event {
	104	union {
	105	struct ib_uverbs_async_event_desc async;
	106	struct ib_uverbs_comp_event_desc comp;
	107	} desc;
bc38a6ab	108	struct list_head list;
63aaf647 RD	109	struct list_head obj_list;
63aaf647 RD	110	u32 *counter;
bc38a6ab RD	111	};
bc38a6ab RD	112
f4e40156 JM	113	struct ib_uverbs_mcast_entry {
	114	struct list_head list;
	115	union ib_gid gid;
	116	u16 lid;
	117	};
	118
63aaf647 RD	119	struct ib_uevent_object {
	120	struct ib_uobject uobject;
	121	struct list_head event_list;
	122	u32 events_reported;
bc38a6ab RD	123	};
bc38a6ab RD	124
53d0bd1e SH	125	struct ib_uxrcd_object {
	126	struct ib_uobject uobject;
	127	atomic_t refcnt;
	128	};
	129
8541f8de SH	130	struct ib_usrq_object {
	131	struct ib_uevent_object uevent;
	132	struct ib_uxrcd_object *uxrcd;
	133	};
	134
f4e40156 JM	135	struct ib_uqp_object {
	136	struct ib_uevent_object uevent;
	137	struct list_head mcast_list;
	138	};
	139
63aaf647 RD	140	struct ib_ucq_object {
63aaf647 RD	141	struct ib_uobject uobject;
7162a3e0	142	struct ib_uverbs_file *uverbs_file;
63aaf647 RD	143	struct list_head comp_list;
	144	struct list_head async_list;
	145	u32 comp_events_reported;
	146	u32 async_events_reported;
bc38a6ab RD	147	};
bc38a6ab RD	148
9ead190b	149	extern spinlock_t ib_uverbs_idr_lock;
bc38a6ab RD	150	extern struct idr ib_uverbs_pd_idr;
	151	extern struct idr ib_uverbs_mr_idr;
	152	extern struct idr ib_uverbs_mw_idr;
	153	extern struct idr ib_uverbs_ah_idr;
	154	extern struct idr ib_uverbs_cq_idr;
	155	extern struct idr ib_uverbs_qp_idr;
f520ba5a	156	extern struct idr ib_uverbs_srq_idr;
53d0bd1e	157	extern struct idr ib_uverbs_xrcd_idr;
bc38a6ab	158
9ead190b RD	159	void idr_remove_uobj(struct idr idp, struct ib_uobject uobj);
9ead190b RD	160
6b73597e	161	struct file ib_uverbs_alloc_event_file(struct ib_uverbs_file uverbs_file,
b1e4594b	162	int is_async);
6b73597e RD	163	struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
6b73597e RD	164
70a30e16 RD	165	void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
	166	struct ib_uverbs_event_file *ev_file,
	167	struct ib_ucq_object *uobj);
	168	void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
	169	struct ib_uevent_object *uobj);
	170
bc38a6ab RD	171	void ib_uverbs_comp_handler(struct ib_cq cq, void cq_context);
	172	void ib_uverbs_cq_event_handler(struct ib_event event, void context_ptr);
	173	void ib_uverbs_qp_event_handler(struct ib_event event, void context_ptr);
f520ba5a	174	void ib_uverbs_srq_event_handler(struct ib_event event, void context_ptr);
6b73597e RD	175	void ib_uverbs_event_handler(struct ib_event_handler *handler,
6b73597e RD	176	struct ib_event *event);
53d0bd1e	177	void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device dev, struct ib_xrcd xrcd);
bc38a6ab	178
bc38a6ab RD	179	#define IB_UVERBS_DECLARE_CMD(name) \
	180	ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
	181	const char __user *buf, int in_len, \
	182	int out_len)
	183
bc38a6ab RD	184	IB_UVERBS_DECLARE_CMD(get_context);
	185	IB_UVERBS_DECLARE_CMD(query_device);
	186	IB_UVERBS_DECLARE_CMD(query_port);
bc38a6ab RD	187	IB_UVERBS_DECLARE_CMD(alloc_pd);
	188	IB_UVERBS_DECLARE_CMD(dealloc_pd);
	189	IB_UVERBS_DECLARE_CMD(reg_mr);
	190	IB_UVERBS_DECLARE_CMD(dereg_mr);
6b73597e	191	IB_UVERBS_DECLARE_CMD(create_comp_channel);
bc38a6ab	192	IB_UVERBS_DECLARE_CMD(create_cq);
33b9b3ee	193	IB_UVERBS_DECLARE_CMD(resize_cq);
67cdb40c RD	194	IB_UVERBS_DECLARE_CMD(poll_cq);
67cdb40c RD	195	IB_UVERBS_DECLARE_CMD(req_notify_cq);
bc38a6ab RD	196	IB_UVERBS_DECLARE_CMD(destroy_cq);
bc38a6ab RD	197	IB_UVERBS_DECLARE_CMD(create_qp);
7ccc9a24	198	IB_UVERBS_DECLARE_CMD(query_qp);
bc38a6ab RD	199	IB_UVERBS_DECLARE_CMD(modify_qp);
bc38a6ab RD	200	IB_UVERBS_DECLARE_CMD(destroy_qp);
67cdb40c RD	201	IB_UVERBS_DECLARE_CMD(post_send);
	202	IB_UVERBS_DECLARE_CMD(post_recv);
	203	IB_UVERBS_DECLARE_CMD(post_srq_recv);
	204	IB_UVERBS_DECLARE_CMD(create_ah);
	205	IB_UVERBS_DECLARE_CMD(destroy_ah);
bc38a6ab RD	206	IB_UVERBS_DECLARE_CMD(attach_mcast);
bc38a6ab RD	207	IB_UVERBS_DECLARE_CMD(detach_mcast);
f520ba5a RD	208	IB_UVERBS_DECLARE_CMD(create_srq);
f520ba5a RD	209	IB_UVERBS_DECLARE_CMD(modify_srq);
8bdb0e86	210	IB_UVERBS_DECLARE_CMD(query_srq);
f520ba5a	211	IB_UVERBS_DECLARE_CMD(destroy_srq);
8541f8de	212	IB_UVERBS_DECLARE_CMD(create_xsrq);
53d0bd1e SH	213	IB_UVERBS_DECLARE_CMD(open_xrcd);
53d0bd1e SH	214	IB_UVERBS_DECLARE_CMD(close_xrcd);
bc38a6ab RD	215
bc38a6ab RD	216	#endif /* UVERBS_H */