1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
6 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
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.
35 *
36 * $Id: uverbs.h 2559 2005-06-06 19:43:16Z roland $
37 */
38
39 #ifndef UVERBS_H
40 #define UVERBS_H
41
42 #include <linux/kref.h>
43 #include <linux/idr.h>
44 #include <linux/mutex.h>
45 #include <linux/completion.h>
46
47 #include <rdma/ib_verbs.h>
48 #include <rdma/ib_umem.h>
49 #include <rdma/ib_user_verbs.h>
50
51 /*
52 * Our lifetime rules for these structs are the following:
53 *
54 * struct ib_uverbs_device: One reference is held by the module and
55 * released in ib_uverbs_remove_one(). Another reference is taken by
56 * ib_uverbs_open() each time the character special file is opened,
57 * and released in ib_uverbs_release_file() when the file is released.
58 *
59 * struct ib_uverbs_file: One reference is held by the VFS and
60 * released when the file is closed. Another reference is taken when
61 * an asynchronous event queue file is created and released when the
62 * event file is closed.
63 *
64 * struct ib_uverbs_event_file: One reference is held by the VFS and
65 * released when the file is closed. For asynchronous event files,
66 * another reference is held by the corresponding main context file
67 * and released when that file is closed. For completion event files,
68 * a reference is taken when a CQ is created that uses the file, and
69 * released when the CQ is destroyed.
70 */
71
72 struct ib_uverbs_device {
73 struct kref ref;
74 struct completion comp;
75 int devnum;
76 struct cdev *dev;
77 struct class_device *class_dev;
78 struct ib_device *ib_dev;
79 int num_comp_vectors;
80 };
81
82 struct ib_uverbs_event_file {
83 struct kref ref;
84 struct file *file;
85 struct ib_uverbs_file *uverbs_file;
86 spinlock_t lock;
87 int is_async;
88 wait_queue_head_t poll_wait;
89 struct fasync_struct *async_queue;
90 struct list_head event_list;
91 };
92
93 struct ib_uverbs_file {
94 struct kref ref;
95 struct mutex mutex;
96 struct ib_uverbs_device *device;
97 struct ib_ucontext *ucontext;
98 struct ib_event_handler event_handler;
99 struct ib_uverbs_event_file *async_file;
100 };
101
102 struct ib_uverbs_event {
103 union {
104 struct ib_uverbs_async_event_desc async;
105 struct ib_uverbs_comp_event_desc comp;
106 } desc;
107 struct list_head list;
108 struct list_head obj_list;
109 u32 *counter;
110 };
111
112 struct ib_uverbs_mcast_entry {
113 struct list_head list;
114 union ib_gid gid;
115 u16 lid;
116 };
117
118 struct ib_uevent_object {
119 struct ib_uobject uobject;
120 struct list_head event_list;
121 u32 events_reported;
122 };
123
124 struct ib_uqp_object {
125 struct ib_uevent_object uevent;
126 struct list_head mcast_list;
127 };
128
129 struct ib_ucq_object {
130 struct ib_uobject uobject;
131 struct ib_uverbs_file *uverbs_file;
132 struct list_head comp_list;
133 struct list_head async_list;
134 u32 comp_events_reported;
135 u32 async_events_reported;
136 };
137
138 extern spinlock_t ib_uverbs_idr_lock;
139 extern struct idr ib_uverbs_pd_idr;
140 extern struct idr ib_uverbs_mr_idr;
141 extern struct idr ib_uverbs_mw_idr;
142 extern struct idr ib_uverbs_ah_idr;
143 extern struct idr ib_uverbs_cq_idr;
144 extern struct idr ib_uverbs_qp_idr;
145 extern struct idr ib_uverbs_srq_idr;
146
147 void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj);
148
149 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
150 int is_async, int *fd);
151 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);
152
153 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
154 struct ib_uverbs_event_file *ev_file,
155 struct ib_ucq_object *uobj);
156 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
157 struct ib_uevent_object *uobj);
158
159 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
160 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
161 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
162 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
163 void ib_uverbs_event_handler(struct ib_event_handler *handler,
164 struct ib_event *event);
165
166 #define IB_UVERBS_DECLARE_CMD(name) \
167 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
168 const char __user *buf, int in_len, \
169 int out_len)
170
171 IB_UVERBS_DECLARE_CMD(get_context);
172 IB_UVERBS_DECLARE_CMD(query_device);
173 IB_UVERBS_DECLARE_CMD(query_port);
174 IB_UVERBS_DECLARE_CMD(alloc_pd);
175 IB_UVERBS_DECLARE_CMD(dealloc_pd);
176 IB_UVERBS_DECLARE_CMD(reg_mr);
177 IB_UVERBS_DECLARE_CMD(dereg_mr);
178 IB_UVERBS_DECLARE_CMD(create_comp_channel);
179 IB_UVERBS_DECLARE_CMD(create_cq);
180 IB_UVERBS_DECLARE_CMD(resize_cq);
181 IB_UVERBS_DECLARE_CMD(poll_cq);
182 IB_UVERBS_DECLARE_CMD(req_notify_cq);
183 IB_UVERBS_DECLARE_CMD(destroy_cq);
184 IB_UVERBS_DECLARE_CMD(create_qp);
185 IB_UVERBS_DECLARE_CMD(query_qp);
186 IB_UVERBS_DECLARE_CMD(modify_qp);
187 IB_UVERBS_DECLARE_CMD(destroy_qp);
188 IB_UVERBS_DECLARE_CMD(post_send);
189 IB_UVERBS_DECLARE_CMD(post_recv);
190 IB_UVERBS_DECLARE_CMD(post_srq_recv);
191 IB_UVERBS_DECLARE_CMD(create_ah);
192 IB_UVERBS_DECLARE_CMD(destroy_ah);
193 IB_UVERBS_DECLARE_CMD(attach_mcast);
194 IB_UVERBS_DECLARE_CMD(detach_mcast);
195 IB_UVERBS_DECLARE_CMD(create_srq);
196 IB_UVERBS_DECLARE_CMD(modify_srq);
197 IB_UVERBS_DECLARE_CMD(query_srq);
198 IB_UVERBS_DECLARE_CMD(destroy_srq);
199
200 #endif /* UVERBS_H */
201
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