summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/core/uverbs.h
blob: 643c08a025a52d015431b8a27be1ddcacbd36845 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/*
 * 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>

#define INIT_UDATA(udata, ibuf, obuf, ilen, olen)			\
	do {								\
		(udata)->inbuf  = (const void __user *) (ibuf);		\
		(udata)->outbuf = (void __user *) (obuf);		\
		(udata)->inlen  = (ilen);				\
		(udata)->outlen = (olen);				\
	} while (0)

#define INIT_UDATA_BUF_OR_NULL(udata, ibuf, obuf, ilen, olen)			\
	do {									\
		(udata)->inbuf  = (ilen) ? (const void __user *) (ibuf) : NULL;	\
		(udata)->outbuf = (olen) ? (void __user *) (obuf) : NULL;	\
		(udata)->inlen  = (ilen);					\
		(udata)->outlen = (olen);					\
	} while (0)

/*
 * 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_uxrcd_object *uxrcd;
};

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;
extern struct idr ib_uverbs_rule_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);

struct ib_uverbs_flow_spec {
	union {
		union {
			struct ib_uverbs_flow_spec_hdr hdr;
			struct {
				__u32 type;
				__u16 size;
				__u16 reserved;
			};
		};
		struct ib_uverbs_flow_spec_eth     eth;
		struct ib_uverbs_flow_spec_ipv4    ipv4;
		struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
	};
};

#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(rereg_mr);
IB_UVERBS_DECLARE_CMD(dereg_mr);
IB_UVERBS_DECLARE_CMD(alloc_mw);
IB_UVERBS_DECLARE_CMD(dealloc_mw);
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(open_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);

#define IB_UVERBS_DECLARE_EX_CMD(name)				\
	int ib_uverbs_ex_##name(struct ib_uverbs_file *file,	\
				struct ib_udata *ucore,		\
				struct ib_udata *uhw)

IB_UVERBS_DECLARE_EX_CMD(create_flow);
IB_UVERBS_DECLARE_EX_CMD(destroy_flow);

#endif /* UVERBS_H */
OpenPOWER on IntegriCloud