Merge tag 'drm-intel-fixes-2015-08-20' of git://anongit.freedesktop.org/drm-intel...
[deliverable/linux.git] / drivers / infiniband / core / uverbs.h
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1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
33b9b3ee 3 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
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4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
67cdb40c 6 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
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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.
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35 */
36
37#ifndef UVERBS_H
38#define UVERBS_H
39
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40#include <linux/kref.h>
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
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50#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
51 do { \
309243ec 52 (udata)->inbuf = (const void __user *) (ibuf); \
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53 (udata)->outbuf = (void __user *) (obuf); \
54 (udata)->inlen = (ilen); \
55 (udata)->outlen = (olen); \
56 } while (0)
57
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58#define INIT_UDATA_BUF_OR_NULL(udata, ibuf, obuf, ilen, olen) \
59 do { \
60 (udata)->inbuf = (ilen) ? (const void __user *) (ibuf) : NULL; \
61 (udata)->outbuf = (olen) ? (void __user *) (obuf) : NULL; \
62 (udata)->inlen = (ilen); \
63 (udata)->outlen = (olen); \
64 } while (0)
65
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66/*
67 * Our lifetime rules for these structs are the following:
68 *
69 * struct ib_uverbs_device: One reference is held by the module and
70 * released in ib_uverbs_remove_one(). Another reference is taken by
71 * ib_uverbs_open() each time the character special file is opened,
72 * and released in ib_uverbs_release_file() when the file is released.
73 *
74 * struct ib_uverbs_file: One reference is held by the VFS and
75 * released when the file is closed. Another reference is taken when
76 * an asynchronous event queue file is created and released when the
77 * event file is closed.
78 *
79 * struct ib_uverbs_event_file: One reference is held by the VFS and
80 * released when the file is closed. For asynchronous event files,
81 * another reference is held by the corresponding main context file
82 * and released when that file is closed. For completion event files,
83 * a reference is taken when a CQ is created that uses the file, and
84 * released when the CQ is destroyed.
85 */
86
bc38a6ab 87struct ib_uverbs_device {
70a30e16 88 struct kref ref;
055422dd 89 int num_comp_vectors;
fd60ae40 90 struct completion comp;
f4e91eb4 91 struct device *dev;
bc38a6ab 92 struct ib_device *ib_dev;
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93 int devnum;
94 struct cdev cdev;
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95 struct rb_root xrcd_tree;
96 struct mutex xrcd_tree_mutex;
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97};
98
99struct ib_uverbs_event_file {
100 struct kref ref;
830a3871 101 int is_async;
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102 struct ib_uverbs_file *uverbs_file;
103 spinlock_t lock;
830a3871 104 int is_closed;
bc38a6ab 105 wait_queue_head_t poll_wait;
abdf119b 106 struct fasync_struct *async_queue;
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107 struct list_head event_list;
108};
109
110struct ib_uverbs_file {
111 struct kref ref;
95ed644f 112 struct mutex mutex;
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113 struct ib_uverbs_device *device;
114 struct ib_ucontext *ucontext;
115 struct ib_event_handler event_handler;
6b73597e 116 struct ib_uverbs_event_file *async_file;
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117};
118
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119struct ib_uverbs_event {
120 union {
121 struct ib_uverbs_async_event_desc async;
122 struct ib_uverbs_comp_event_desc comp;
123 } desc;
bc38a6ab 124 struct list_head list;
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125 struct list_head obj_list;
126 u32 *counter;
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127};
128
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129struct ib_uverbs_mcast_entry {
130 struct list_head list;
131 union ib_gid gid;
132 u16 lid;
133};
134
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135struct ib_uevent_object {
136 struct ib_uobject uobject;
137 struct list_head event_list;
138 u32 events_reported;
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139};
140
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141struct ib_uxrcd_object {
142 struct ib_uobject uobject;
143 atomic_t refcnt;
144};
145
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146struct ib_usrq_object {
147 struct ib_uevent_object uevent;
148 struct ib_uxrcd_object *uxrcd;
149};
150
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151struct ib_uqp_object {
152 struct ib_uevent_object uevent;
153 struct list_head mcast_list;
846be90d 154 struct ib_uxrcd_object *uxrcd;
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155};
156
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157struct ib_ucq_object {
158 struct ib_uobject uobject;
7162a3e0 159 struct ib_uverbs_file *uverbs_file;
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160 struct list_head comp_list;
161 struct list_head async_list;
162 u32 comp_events_reported;
163 u32 async_events_reported;
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164};
165
9ead190b 166extern spinlock_t ib_uverbs_idr_lock;
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167extern struct idr ib_uverbs_pd_idr;
168extern struct idr ib_uverbs_mr_idr;
169extern struct idr ib_uverbs_mw_idr;
170extern struct idr ib_uverbs_ah_idr;
171extern struct idr ib_uverbs_cq_idr;
172extern struct idr ib_uverbs_qp_idr;
f520ba5a 173extern struct idr ib_uverbs_srq_idr;
53d0bd1e 174extern struct idr ib_uverbs_xrcd_idr;
436f2ad0 175extern struct idr ib_uverbs_rule_idr;
bc38a6ab 176
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177void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj);
178
6b73597e 179struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
b1e4594b 180 int is_async);
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181struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
182
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183void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
184 struct ib_uverbs_event_file *ev_file,
185 struct ib_ucq_object *uobj);
186void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
187 struct ib_uevent_object *uobj);
188
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189void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
190void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
191void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
f520ba5a 192void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
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193void ib_uverbs_event_handler(struct ib_event_handler *handler,
194 struct ib_event *event);
53d0bd1e 195void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd);
bc38a6ab 196
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197struct ib_uverbs_flow_spec {
198 union {
199 union {
200 struct ib_uverbs_flow_spec_hdr hdr;
201 struct {
202 __u32 type;
203 __u16 size;
204 __u16 reserved;
205 };
206 };
207 struct ib_uverbs_flow_spec_eth eth;
208 struct ib_uverbs_flow_spec_ipv4 ipv4;
209 struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
210 };
211};
212
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213#define IB_UVERBS_DECLARE_CMD(name) \
214 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
215 const char __user *buf, int in_len, \
216 int out_len)
217
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218IB_UVERBS_DECLARE_CMD(get_context);
219IB_UVERBS_DECLARE_CMD(query_device);
220IB_UVERBS_DECLARE_CMD(query_port);
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221IB_UVERBS_DECLARE_CMD(alloc_pd);
222IB_UVERBS_DECLARE_CMD(dealloc_pd);
223IB_UVERBS_DECLARE_CMD(reg_mr);
7e6edb9b 224IB_UVERBS_DECLARE_CMD(rereg_mr);
bc38a6ab 225IB_UVERBS_DECLARE_CMD(dereg_mr);
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226IB_UVERBS_DECLARE_CMD(alloc_mw);
227IB_UVERBS_DECLARE_CMD(dealloc_mw);
6b73597e 228IB_UVERBS_DECLARE_CMD(create_comp_channel);
bc38a6ab 229IB_UVERBS_DECLARE_CMD(create_cq);
33b9b3ee 230IB_UVERBS_DECLARE_CMD(resize_cq);
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231IB_UVERBS_DECLARE_CMD(poll_cq);
232IB_UVERBS_DECLARE_CMD(req_notify_cq);
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233IB_UVERBS_DECLARE_CMD(destroy_cq);
234IB_UVERBS_DECLARE_CMD(create_qp);
42849b26 235IB_UVERBS_DECLARE_CMD(open_qp);
7ccc9a24 236IB_UVERBS_DECLARE_CMD(query_qp);
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237IB_UVERBS_DECLARE_CMD(modify_qp);
238IB_UVERBS_DECLARE_CMD(destroy_qp);
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239IB_UVERBS_DECLARE_CMD(post_send);
240IB_UVERBS_DECLARE_CMD(post_recv);
241IB_UVERBS_DECLARE_CMD(post_srq_recv);
242IB_UVERBS_DECLARE_CMD(create_ah);
243IB_UVERBS_DECLARE_CMD(destroy_ah);
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244IB_UVERBS_DECLARE_CMD(attach_mcast);
245IB_UVERBS_DECLARE_CMD(detach_mcast);
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246IB_UVERBS_DECLARE_CMD(create_srq);
247IB_UVERBS_DECLARE_CMD(modify_srq);
8bdb0e86 248IB_UVERBS_DECLARE_CMD(query_srq);
f520ba5a 249IB_UVERBS_DECLARE_CMD(destroy_srq);
8541f8de 250IB_UVERBS_DECLARE_CMD(create_xsrq);
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251IB_UVERBS_DECLARE_CMD(open_xrcd);
252IB_UVERBS_DECLARE_CMD(close_xrcd);
f21519b2 253
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254#define IB_UVERBS_DECLARE_EX_CMD(name) \
255 int ib_uverbs_ex_##name(struct ib_uverbs_file *file, \
256 struct ib_udata *ucore, \
257 struct ib_udata *uhw)
258
259IB_UVERBS_DECLARE_EX_CMD(create_flow);
260IB_UVERBS_DECLARE_EX_CMD(destroy_flow);
02d1aa7a 261IB_UVERBS_DECLARE_EX_CMD(query_device);
565197dd 262IB_UVERBS_DECLARE_EX_CMD(create_cq);
f21519b2 263
bc38a6ab 264#endif /* UVERBS_H */
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