blob: ec83e9fe387bd9112266d984254a9f00200e7652 [file] [log] [blame]
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
Roland Dreier33b9b3e2006-01-30 14:29:21 -08003 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
Roland Dreier2a1d9b72005-08-10 23:03:10 -07004 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
Roland Dreier67cdb402005-10-14 15:26:04 -07006 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
Roland Dreierbc38a6a2005-07-07 17:57:13 -07007 *
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.
Roland Dreierbc38a6a2005-07-07 17:57:13 -070035 */
36
37#include <linux/module.h>
38#include <linux/init.h>
39#include <linux/device.h>
40#include <linux/err.h>
41#include <linux/fs.h>
42#include <linux/poll.h>
Alexey Dobriyana99bbaf2009-10-04 16:11:37 +040043#include <linux/sched.h>
Roland Dreierbc38a6a2005-07-07 17:57:13 -070044#include <linux/file.h>
Roland Dreier70a30e12005-10-28 15:38:26 -070045#include <linux/cdev.h>
Roland Dreiera265e552010-02-24 16:51:20 -080046#include <linux/anon_inodes.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090047#include <linux/slab.h>
Roland Dreierbc38a6a2005-07-07 17:57:13 -070048
49#include <asm/uaccess.h>
50
51#include "uverbs.h"
52
53MODULE_AUTHOR("Roland Dreier");
54MODULE_DESCRIPTION("InfiniBand userspace verbs access");
55MODULE_LICENSE("Dual BSD/GPL");
56
Roland Dreierbc38a6a2005-07-07 17:57:13 -070057enum {
58 IB_UVERBS_MAJOR = 231,
59 IB_UVERBS_BASE_MINOR = 192,
60 IB_UVERBS_MAX_DEVICES = 32
61};
62
63#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
64
Roland Dreier70a30e12005-10-28 15:38:26 -070065static struct class *uverbs_class;
66
Roland Dreier9ead1902006-06-17 20:44:49 -070067DEFINE_SPINLOCK(ib_uverbs_idr_lock);
Roland Dreierbc38a6a2005-07-07 17:57:13 -070068DEFINE_IDR(ib_uverbs_pd_idr);
69DEFINE_IDR(ib_uverbs_mr_idr);
70DEFINE_IDR(ib_uverbs_mw_idr);
71DEFINE_IDR(ib_uverbs_ah_idr);
72DEFINE_IDR(ib_uverbs_cq_idr);
73DEFINE_IDR(ib_uverbs_qp_idr);
Roland Dreierf520ba52005-08-18 12:24:13 -070074DEFINE_IDR(ib_uverbs_srq_idr);
Roland Dreierbc38a6a2005-07-07 17:57:13 -070075
Roland Dreier6276e082009-09-05 20:24:23 -070076static DEFINE_SPINLOCK(map_lock);
Roland Dreierbc38a6a2005-07-07 17:57:13 -070077static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
78
79static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
80 const char __user *buf, int in_len,
81 int out_len) = {
Alexander Chiang9afed762010-02-02 19:08:19 +000082 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
83 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
84 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
85 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
86 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
87 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
88 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
Roland Dreier6b735972005-09-26 13:53:25 -070089 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
Alexander Chiang9afed762010-02-02 19:08:19 +000090 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
91 [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
92 [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
93 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
94 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
95 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
96 [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
97 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
98 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
99 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
100 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
101 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
102 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
103 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
104 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
105 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
106 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
107 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
108 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
109 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700110};
111
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700112static void ib_uverbs_add_one(struct ib_device *device);
113static void ib_uverbs_remove_one(struct ib_device *device);
114
Roland Dreier70a30e12005-10-28 15:38:26 -0700115static void ib_uverbs_release_dev(struct kref *ref)
116{
117 struct ib_uverbs_device *dev =
118 container_of(ref, struct ib_uverbs_device, ref);
119
Jack Morgensteinfd60ae42006-08-03 10:56:42 -0700120 complete(&dev->comp);
Roland Dreier70a30e12005-10-28 15:38:26 -0700121}
122
Roland Dreier04d29b02007-10-09 19:59:15 -0700123static void ib_uverbs_release_event_file(struct kref *ref)
124{
125 struct ib_uverbs_event_file *file =
126 container_of(ref, struct ib_uverbs_event_file, ref);
127
128 kfree(file);
129}
130
Roland Dreier70a30e12005-10-28 15:38:26 -0700131void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
132 struct ib_uverbs_event_file *ev_file,
133 struct ib_ucq_object *uobj)
134{
135 struct ib_uverbs_event *evt, *tmp;
136
137 if (ev_file) {
138 spin_lock_irq(&ev_file->lock);
139 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
140 list_del(&evt->list);
141 kfree(evt);
142 }
143 spin_unlock_irq(&ev_file->lock);
144
145 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
146 }
147
148 spin_lock_irq(&file->async_file->lock);
149 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
150 list_del(&evt->list);
151 kfree(evt);
152 }
153 spin_unlock_irq(&file->async_file->lock);
154}
155
156void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
157 struct ib_uevent_object *uobj)
158{
159 struct ib_uverbs_event *evt, *tmp;
160
161 spin_lock_irq(&file->async_file->lock);
162 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
163 list_del(&evt->list);
164 kfree(evt);
165 }
166 spin_unlock_irq(&file->async_file->lock);
167}
168
Jack Morgensteinf4e40152005-11-29 16:57:01 -0800169static void ib_uverbs_detach_umcast(struct ib_qp *qp,
170 struct ib_uqp_object *uobj)
171{
172 struct ib_uverbs_mcast_entry *mcast, *tmp;
173
174 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
175 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
176 list_del(&mcast->list);
177 kfree(mcast);
178 }
179}
180
Roland Dreier70a30e12005-10-28 15:38:26 -0700181static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
182 struct ib_ucontext *context)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700183{
184 struct ib_uobject *uobj, *tmp;
185
186 if (!context)
187 return 0;
188
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800189 context->closing = 1;
190
Roland Dreier67cdb402005-10-14 15:26:04 -0700191 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700192 struct ib_ah *ah = uobj->object;
193
194 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -0700195 ib_destroy_ah(ah);
Roland Dreier67cdb402005-10-14 15:26:04 -0700196 kfree(uobj);
197 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700198
199 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700200 struct ib_qp *qp = uobj->object;
Jack Morgensteinf4e40152005-11-29 16:57:01 -0800201 struct ib_uqp_object *uqp =
202 container_of(uobj, struct ib_uqp_object, uevent.uobject);
Roland Dreier9ead1902006-06-17 20:44:49 -0700203
204 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
Jack Morgensteinf4e40152005-11-29 16:57:01 -0800205 ib_uverbs_detach_umcast(qp, uqp);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700206 ib_destroy_qp(qp);
Jack Morgensteinf4e40152005-11-29 16:57:01 -0800207 ib_uverbs_release_uevent(file, &uqp->uevent);
208 kfree(uqp);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700209 }
210
211 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700212 struct ib_cq *cq = uobj->object;
Roland Dreier70a30e12005-10-28 15:38:26 -0700213 struct ib_uverbs_event_file *ev_file = cq->cq_context;
214 struct ib_ucq_object *ucq =
215 container_of(uobj, struct ib_ucq_object, uobject);
Roland Dreier9ead1902006-06-17 20:44:49 -0700216
217 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700218 ib_destroy_cq(cq);
Roland Dreier70a30e12005-10-28 15:38:26 -0700219 ib_uverbs_release_ucq(file, ev_file, ucq);
220 kfree(ucq);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700221 }
222
Roland Dreierf520ba52005-08-18 12:24:13 -0700223 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700224 struct ib_srq *srq = uobj->object;
Roland Dreier70a30e12005-10-28 15:38:26 -0700225 struct ib_uevent_object *uevent =
226 container_of(uobj, struct ib_uevent_object, uobject);
Roland Dreier9ead1902006-06-17 20:44:49 -0700227
228 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
Roland Dreierf520ba52005-08-18 12:24:13 -0700229 ib_destroy_srq(srq);
Roland Dreier70a30e12005-10-28 15:38:26 -0700230 ib_uverbs_release_uevent(file, uevent);
231 kfree(uevent);
Roland Dreierf520ba52005-08-18 12:24:13 -0700232 }
233
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700234 /* XXX Free MWs */
235
236 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700237 struct ib_mr *mr = uobj->object;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700238
Roland Dreier9ead1902006-06-17 20:44:49 -0700239 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700240 ib_dereg_mr(mr);
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800241 kfree(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700242 }
243
244 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
Roland Dreier9ead1902006-06-17 20:44:49 -0700245 struct ib_pd *pd = uobj->object;
246
247 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700248 ib_dealloc_pd(pd);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700249 kfree(uobj);
250 }
251
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700252 return context->device->dealloc_ucontext(context);
253}
254
255static void ib_uverbs_release_file(struct kref *ref)
256{
257 struct ib_uverbs_file *file =
258 container_of(ref, struct ib_uverbs_file, ref);
259
260 module_put(file->device->ib_dev->owner);
Roland Dreier70a30e12005-10-28 15:38:26 -0700261 kref_put(&file->device->ref, ib_uverbs_release_dev);
262
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700263 kfree(file);
264}
265
266static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
267 size_t count, loff_t *pos)
268{
269 struct ib_uverbs_event_file *file = filp->private_data;
Roland Dreier63aaf642005-09-09 15:55:08 -0700270 struct ib_uverbs_event *event;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700271 int eventsz;
272 int ret = 0;
273
274 spin_lock_irq(&file->lock);
275
Roland Dreier6b735972005-09-26 13:53:25 -0700276 while (list_empty(&file->event_list)) {
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700277 spin_unlock_irq(&file->lock);
278
279 if (filp->f_flags & O_NONBLOCK)
280 return -EAGAIN;
281
282 if (wait_event_interruptible(file->poll_wait,
Roland Dreier6b735972005-09-26 13:53:25 -0700283 !list_empty(&file->event_list)))
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700284 return -ERESTARTSYS;
285
286 spin_lock_irq(&file->lock);
287 }
288
Roland Dreier63aaf642005-09-09 15:55:08 -0700289 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
290
291 if (file->is_async)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700292 eventsz = sizeof (struct ib_uverbs_async_event_desc);
Roland Dreier63aaf642005-09-09 15:55:08 -0700293 else
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700294 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700295
296 if (eventsz > count) {
297 ret = -EINVAL;
298 event = NULL;
Roland Dreier63aaf642005-09-09 15:55:08 -0700299 } else {
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700300 list_del(file->event_list.next);
Roland Dreier63aaf642005-09-09 15:55:08 -0700301 if (event->counter) {
302 ++(*event->counter);
303 list_del(&event->obj_list);
304 }
305 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700306
307 spin_unlock_irq(&file->lock);
308
309 if (event) {
310 if (copy_to_user(buf, event, eventsz))
311 ret = -EFAULT;
312 else
313 ret = eventsz;
314 }
315
316 kfree(event);
317
318 return ret;
319}
320
321static unsigned int ib_uverbs_event_poll(struct file *filp,
322 struct poll_table_struct *wait)
323{
324 unsigned int pollflags = 0;
325 struct ib_uverbs_event_file *file = filp->private_data;
326
327 poll_wait(filp, &file->poll_wait, wait);
328
329 spin_lock_irq(&file->lock);
Roland Dreier6b735972005-09-26 13:53:25 -0700330 if (!list_empty(&file->event_list))
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700331 pollflags = POLLIN | POLLRDNORM;
332 spin_unlock_irq(&file->lock);
333
334 return pollflags;
335}
336
Gleb Natapovabdf1192005-07-27 14:40:00 -0700337static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
338{
339 struct ib_uverbs_event_file *file = filp->private_data;
340
341 return fasync_helper(fd, filp, on, &file->async_queue);
342}
343
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700344static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
345{
346 struct ib_uverbs_event_file *file = filp->private_data;
Roland Dreier6b735972005-09-26 13:53:25 -0700347 struct ib_uverbs_event *entry, *tmp;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700348
Roland Dreier6b735972005-09-26 13:53:25 -0700349 spin_lock_irq(&file->lock);
Roland Dreier1ae5c182008-04-16 21:01:08 -0700350 file->is_closed = 1;
Roland Dreier6b735972005-09-26 13:53:25 -0700351 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
352 if (entry->counter)
353 list_del(&entry->obj_list);
354 kfree(entry);
355 }
356 spin_unlock_irq(&file->lock);
357
Roland Dreier6b735972005-09-26 13:53:25 -0700358 if (file->is_async) {
359 ib_unregister_event_handler(&file->uverbs_file->event_handler);
360 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
361 }
362 kref_put(&file->ref, ib_uverbs_release_event_file);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700363
364 return 0;
365}
366
Arjan van de Ven2b8693c2007-02-12 00:55:32 -0800367static const struct file_operations uverbs_event_fops = {
Roland Dreier6b735972005-09-26 13:53:25 -0700368 .owner = THIS_MODULE,
Alexander Chiang9afed762010-02-02 19:08:19 +0000369 .read = ib_uverbs_event_read,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700370 .poll = ib_uverbs_event_poll,
Gleb Natapovabdf1192005-07-27 14:40:00 -0700371 .release = ib_uverbs_event_close,
Roland Dreierbc1db9a2010-04-09 17:13:50 -0700372 .fasync = ib_uverbs_event_fasync,
373 .llseek = no_llseek,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700374};
375
376void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
377{
Roland Dreier6b735972005-09-26 13:53:25 -0700378 struct ib_uverbs_event_file *file = cq_context;
379 struct ib_ucq_object *uobj;
380 struct ib_uverbs_event *entry;
381 unsigned long flags;
382
383 if (!file)
384 return;
385
386 spin_lock_irqsave(&file->lock, flags);
Roland Dreier1ae5c182008-04-16 21:01:08 -0700387 if (file->is_closed) {
Roland Dreier6b735972005-09-26 13:53:25 -0700388 spin_unlock_irqrestore(&file->lock, flags);
389 return;
390 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700391
392 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
Roland Dreier305a7e82005-10-11 15:39:38 -0700393 if (!entry) {
394 spin_unlock_irqrestore(&file->lock, flags);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700395 return;
Roland Dreier305a7e82005-10-11 15:39:38 -0700396 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700397
Roland Dreier63aaf642005-09-09 15:55:08 -0700398 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
399
400 entry->desc.comp.cq_handle = cq->uobject->user_handle;
401 entry->counter = &uobj->comp_events_reported;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700402
Roland Dreier6b735972005-09-26 13:53:25 -0700403 list_add_tail(&entry->list, &file->event_list);
Roland Dreier63aaf642005-09-09 15:55:08 -0700404 list_add_tail(&entry->obj_list, &uobj->comp_list);
Roland Dreier6b735972005-09-26 13:53:25 -0700405 spin_unlock_irqrestore(&file->lock, flags);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700406
Roland Dreier6b735972005-09-26 13:53:25 -0700407 wake_up_interruptible(&file->poll_wait);
408 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700409}
410
411static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
Roland Dreier63aaf642005-09-09 15:55:08 -0700412 __u64 element, __u64 event,
413 struct list_head *obj_list,
414 u32 *counter)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700415{
Roland Dreier63aaf642005-09-09 15:55:08 -0700416 struct ib_uverbs_event *entry;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700417 unsigned long flags;
418
Roland Dreier6b735972005-09-26 13:53:25 -0700419 spin_lock_irqsave(&file->async_file->lock, flags);
Jack Morgensteinfb77bce2008-06-18 15:36:38 -0700420 if (file->async_file->is_closed) {
Roland Dreier6b735972005-09-26 13:53:25 -0700421 spin_unlock_irqrestore(&file->async_file->lock, flags);
422 return;
423 }
424
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700425 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
Roland Dreier305a7e82005-10-11 15:39:38 -0700426 if (!entry) {
427 spin_unlock_irqrestore(&file->async_file->lock, flags);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700428 return;
Roland Dreier305a7e82005-10-11 15:39:38 -0700429 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700430
Roland Dreier63aaf642005-09-09 15:55:08 -0700431 entry->desc.async.element = element;
432 entry->desc.async.event_type = event;
433 entry->counter = counter;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700434
Roland Dreier6b735972005-09-26 13:53:25 -0700435 list_add_tail(&entry->list, &file->async_file->event_list);
Roland Dreier63aaf642005-09-09 15:55:08 -0700436 if (obj_list)
437 list_add_tail(&entry->obj_list, obj_list);
Roland Dreier6b735972005-09-26 13:53:25 -0700438 spin_unlock_irqrestore(&file->async_file->lock, flags);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700439
Roland Dreier6b735972005-09-26 13:53:25 -0700440 wake_up_interruptible(&file->async_file->poll_wait);
441 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700442}
443
444void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
445{
Roland Dreier7162a3e2005-10-30 09:50:04 -0800446 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
447 struct ib_ucq_object, uobject);
Roland Dreier63aaf642005-09-09 15:55:08 -0700448
Roland Dreier7162a3e2005-10-30 09:50:04 -0800449 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
Roland Dreier63aaf642005-09-09 15:55:08 -0700450 event->event, &uobj->async_list,
451 &uobj->async_events_reported);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700452}
453
454void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
455{
Roland Dreier63aaf642005-09-09 15:55:08 -0700456 struct ib_uevent_object *uobj;
457
458 uobj = container_of(event->element.qp->uobject,
459 struct ib_uevent_object, uobject);
460
461 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
462 event->event, &uobj->event_list,
463 &uobj->events_reported);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700464}
465
Roland Dreierf520ba52005-08-18 12:24:13 -0700466void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
467{
Roland Dreier63aaf642005-09-09 15:55:08 -0700468 struct ib_uevent_object *uobj;
469
470 uobj = container_of(event->element.srq->uobject,
471 struct ib_uevent_object, uobject);
472
473 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
474 event->event, &uobj->event_list,
475 &uobj->events_reported);
Roland Dreierf520ba52005-08-18 12:24:13 -0700476}
477
Roland Dreier6b735972005-09-26 13:53:25 -0700478void ib_uverbs_event_handler(struct ib_event_handler *handler,
479 struct ib_event *event)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700480{
481 struct ib_uverbs_file *file =
482 container_of(handler, struct ib_uverbs_file, event_handler);
483
Roland Dreier63aaf642005-09-09 15:55:08 -0700484 ib_uverbs_async_handler(file, event->element.port_num, event->event,
485 NULL, NULL);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700486}
487
Roland Dreier6b735972005-09-26 13:53:25 -0700488struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
Al Virob1e45942010-01-18 01:38:00 -0500489 int is_async)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700490{
Roland Dreier6b735972005-09-26 13:53:25 -0700491 struct ib_uverbs_event_file *ev_file;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700492 struct file *filp;
493
Roland Dreier6b735972005-09-26 13:53:25 -0700494 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
495 if (!ev_file)
496 return ERR_PTR(-ENOMEM);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700497
Roland Dreier6b735972005-09-26 13:53:25 -0700498 kref_init(&ev_file->ref);
499 spin_lock_init(&ev_file->lock);
500 INIT_LIST_HEAD(&ev_file->event_list);
501 init_waitqueue_head(&ev_file->poll_wait);
502 ev_file->uverbs_file = uverbs_file;
503 ev_file->async_queue = NULL;
504 ev_file->is_async = is_async;
Roland Dreier1ae5c182008-04-16 21:01:08 -0700505 ev_file->is_closed = 0;
Roland Dreier6b735972005-09-26 13:53:25 -0700506
Al Virob1e45942010-01-18 01:38:00 -0500507 filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops,
Roland Dreiera265e552010-02-24 16:51:20 -0800508 ev_file, O_RDONLY);
Al Virob1e45942010-01-18 01:38:00 -0500509 if (IS_ERR(filp))
510 kfree(ev_file);
Roland Dreiera7dab9e2008-04-16 21:01:08 -0700511
Roland Dreier6b735972005-09-26 13:53:25 -0700512 return filp;
Roland Dreier6b735972005-09-26 13:53:25 -0700513}
514
515/*
516 * Look up a completion event file by FD. If lookup is successful,
517 * takes a ref to the event file struct that it returns; if
518 * unsuccessful, returns NULL.
519 */
520struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
521{
522 struct ib_uverbs_event_file *ev_file = NULL;
523 struct file *filp;
524
525 filp = fget(fd);
526 if (!filp)
527 return NULL;
528
529 if (filp->f_op != &uverbs_event_fops)
530 goto out;
531
532 ev_file = filp->private_data;
533 if (ev_file->is_async) {
534 ev_file = NULL;
535 goto out;
536 }
537
538 kref_get(&ev_file->ref);
539
540out:
541 fput(filp);
542 return ev_file;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700543}
544
545static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
546 size_t count, loff_t *pos)
547{
548 struct ib_uverbs_file *file = filp->private_data;
549 struct ib_uverbs_cmd_hdr hdr;
550
551 if (count < sizeof hdr)
552 return -EINVAL;
553
554 if (copy_from_user(&hdr, buf, sizeof hdr))
555 return -EFAULT;
556
557 if (hdr.in_words * 4 != count)
558 return -EINVAL;
559
Roland Dreier63c47c22005-09-26 13:01:03 -0700560 if (hdr.command < 0 ||
561 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
Jack Morgensteinb1b8afb2009-09-05 20:24:24 -0700562 !uverbs_cmd_table[hdr.command])
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700563 return -EINVAL;
564
Roland Dreier6b735972005-09-26 13:53:25 -0700565 if (!file->ucontext &&
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700566 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
567 return -EINVAL;
568
Jack Morgensteinb1b8afb2009-09-05 20:24:24 -0700569 if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
570 return -ENOSYS;
571
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700572 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
573 hdr.in_words * 4, hdr.out_words * 4);
574}
575
576static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
577{
578 struct ib_uverbs_file *file = filp->private_data;
579
580 if (!file->ucontext)
581 return -ENODEV;
582 else
583 return file->device->ib_dev->mmap(file->ucontext, vma);
584}
585
Roland Dreier5b2d2812008-06-27 14:43:20 -0700586/*
587 * ib_uverbs_open() does not need the BKL:
588 *
Alexander Chiang2a72f212010-02-02 19:07:54 +0000589 * - the ib_uverbs_device structures are properly reference counted and
Roland Dreier5b2d2812008-06-27 14:43:20 -0700590 * everything else is purely local to the file being created, so
591 * races against other open calls are not a problem;
592 * - there is no ioctl method to race against;
Alexander Chiang2a72f212010-02-02 19:07:54 +0000593 * - the open method will either immediately run -ENXIO, or all
594 * required initialization will be done.
Roland Dreier5b2d2812008-06-27 14:43:20 -0700595 */
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700596static int ib_uverbs_open(struct inode *inode, struct file *filp)
597{
Roland Dreier70a30e12005-10-28 15:38:26 -0700598 struct ib_uverbs_device *dev;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700599 struct ib_uverbs_file *file;
Roland Dreier70a30e12005-10-28 15:38:26 -0700600 int ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700601
Alexander Chiang2a72f212010-02-02 19:07:54 +0000602 dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
Roland Dreier70a30e12005-10-28 15:38:26 -0700603 if (dev)
604 kref_get(&dev->ref);
Alexander Chiang2a72f212010-02-02 19:07:54 +0000605 else
Roland Dreier70a30e12005-10-28 15:38:26 -0700606 return -ENXIO;
607
608 if (!try_module_get(dev->ib_dev->owner)) {
609 ret = -ENODEV;
610 goto err;
611 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700612
Roland Dreier6b735972005-09-26 13:53:25 -0700613 file = kmalloc(sizeof *file, GFP_KERNEL);
Roland Dreier63c47c22005-09-26 13:01:03 -0700614 if (!file) {
Roland Dreier70a30e12005-10-28 15:38:26 -0700615 ret = -ENOMEM;
616 goto err_module;
Roland Dreier63c47c22005-09-26 13:01:03 -0700617 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700618
Roland Dreier70a30e12005-10-28 15:38:26 -0700619 file->device = dev;
620 file->ucontext = NULL;
621 file->async_file = NULL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700622 kref_init(&file->ref);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800623 mutex_init(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700624
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700625 filp->private_data = file;
626
Roland Dreierbc1db9a2010-04-09 17:13:50 -0700627 return nonseekable_open(inode, filp);
Roland Dreier70a30e12005-10-28 15:38:26 -0700628
629err_module:
630 module_put(dev->ib_dev->owner);
631
632err:
633 kref_put(&dev->ref, ib_uverbs_release_dev);
Roland Dreier70a30e12005-10-28 15:38:26 -0700634 return ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700635}
636
637static int ib_uverbs_close(struct inode *inode, struct file *filp)
638{
639 struct ib_uverbs_file *file = filp->private_data;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700640
Roland Dreier70a30e12005-10-28 15:38:26 -0700641 ib_uverbs_cleanup_ucontext(file, file->ucontext);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700642
Roland Dreier70a30e12005-10-28 15:38:26 -0700643 if (file->async_file)
644 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
645
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700646 kref_put(&file->ref, ib_uverbs_release_file);
647
648 return 0;
649}
650
Arjan van de Ven2b8693c2007-02-12 00:55:32 -0800651static const struct file_operations uverbs_fops = {
Alexander Chiang9afed762010-02-02 19:08:19 +0000652 .owner = THIS_MODULE,
653 .write = ib_uverbs_write,
654 .open = ib_uverbs_open,
Roland Dreierbc1db9a2010-04-09 17:13:50 -0700655 .release = ib_uverbs_close,
656 .llseek = no_llseek,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700657};
658
Arjan van de Ven2b8693c2007-02-12 00:55:32 -0800659static const struct file_operations uverbs_mmap_fops = {
Alexander Chiang9afed762010-02-02 19:08:19 +0000660 .owner = THIS_MODULE,
661 .write = ib_uverbs_write,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700662 .mmap = ib_uverbs_mmap,
Alexander Chiang9afed762010-02-02 19:08:19 +0000663 .open = ib_uverbs_open,
Roland Dreierbc1db9a2010-04-09 17:13:50 -0700664 .release = ib_uverbs_close,
665 .llseek = no_llseek,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700666};
667
668static struct ib_client uverbs_client = {
669 .name = "uverbs",
670 .add = ib_uverbs_add_one,
671 .remove = ib_uverbs_remove_one
672};
673
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100674static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
675 char *buf)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700676{
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100677 struct ib_uverbs_device *dev = dev_get_drvdata(device);
Roland Dreier70a30e12005-10-28 15:38:26 -0700678
679 if (!dev)
680 return -ENODEV;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700681
682 return sprintf(buf, "%s\n", dev->ib_dev->name);
683}
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100684static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700685
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100686static ssize_t show_dev_abi_version(struct device *device,
687 struct device_attribute *attr, char *buf)
Roland Dreier274c0892005-09-29 14:17:48 -0700688{
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100689 struct ib_uverbs_device *dev = dev_get_drvdata(device);
Roland Dreier70a30e12005-10-28 15:38:26 -0700690
691 if (!dev)
692 return -ENODEV;
Roland Dreier274c0892005-09-29 14:17:48 -0700693
694 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
695}
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100696static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
Roland Dreier274c0892005-09-29 14:17:48 -0700697
Andi Kleen0933e2d2010-01-05 12:48:09 +0100698static CLASS_ATTR_STRING(abi_version, S_IRUGO,
699 __stringify(IB_USER_VERBS_ABI_VERSION));
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700700
Alexander Chiang6d6a0e72010-02-02 19:08:09 +0000701static dev_t overflow_maj;
702static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES);
703
704/*
705 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
706 * requesting a new major number and doubling the number of max devices we
707 * support. It's stupid, but simple.
708 */
709static int find_overflow_devnum(void)
710{
711 int ret;
712
713 if (!overflow_maj) {
714 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES,
715 "infiniband_verbs");
716 if (ret) {
717 printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n");
718 return ret;
719 }
720 }
721
722 ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES);
723 if (ret >= IB_UVERBS_MAX_DEVICES)
724 return -1;
725
726 return ret;
727}
728
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700729static void ib_uverbs_add_one(struct ib_device *device)
730{
Alexander Chiang38707982010-02-02 19:07:59 +0000731 int devnum;
Alexander Chiangddbd6882010-02-02 19:08:04 +0000732 dev_t base;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700733 struct ib_uverbs_device *uverbs_dev;
734
735 if (!device->alloc_ucontext)
736 return;
737
Roland Dreierde6eb662005-11-02 07:23:14 -0800738 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700739 if (!uverbs_dev)
740 return;
741
Roland Dreier70a30e12005-10-28 15:38:26 -0700742 kref_init(&uverbs_dev->ref);
Jack Morgensteinfd60ae42006-08-03 10:56:42 -0700743 init_completion(&uverbs_dev->comp);
Roland Dreier70a30e12005-10-28 15:38:26 -0700744
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700745 spin_lock(&map_lock);
Alexander Chiang38707982010-02-02 19:07:59 +0000746 devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
747 if (devnum >= IB_UVERBS_MAX_DEVICES) {
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700748 spin_unlock(&map_lock);
Alexander Chiang6d6a0e72010-02-02 19:08:09 +0000749 devnum = find_overflow_devnum();
750 if (devnum < 0)
751 goto err;
752
753 spin_lock(&map_lock);
754 uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES;
755 base = devnum + overflow_maj;
756 set_bit(devnum, overflow_map);
757 } else {
758 uverbs_dev->devnum = devnum;
759 base = devnum + IB_UVERBS_BASE_DEV;
760 set_bit(devnum, dev_map);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700761 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700762 spin_unlock(&map_lock);
763
Roland Dreier6b735972005-09-26 13:53:25 -0700764 uverbs_dev->ib_dev = device;
Michael S. Tsirkinf4fd0b22007-05-03 13:48:47 +0300765 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700766
Alexander Chiang055422d2010-02-02 19:07:49 +0000767 cdev_init(&uverbs_dev->cdev, NULL);
768 uverbs_dev->cdev.owner = THIS_MODULE;
769 uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
770 kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum);
Alexander Chiangddbd6882010-02-02 19:08:04 +0000771 if (cdev_add(&uverbs_dev->cdev, base, 1))
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700772 goto err_cdev;
773
Greg Kroah-Hartman91bd4182008-07-21 20:03:34 -0700774 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
Alexander Chiang055422d2010-02-02 19:07:49 +0000775 uverbs_dev->cdev.dev, uverbs_dev,
Greg Kroah-Hartman91bd4182008-07-21 20:03:34 -0700776 "uverbs%d", uverbs_dev->devnum);
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100777 if (IS_ERR(uverbs_dev->dev))
Roland Dreier70a30e12005-10-28 15:38:26 -0700778 goto err_cdev;
779
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100780 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700781 goto err_class;
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100782 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
Roland Dreier274c0892005-09-29 14:17:48 -0700783 goto err_class;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700784
785 ib_set_client_data(device, &uverbs_client, uverbs_dev);
786
787 return;
788
789err_class:
Alexander Chiang055422d2010-02-02 19:07:49 +0000790 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700791
792err_cdev:
Alexander Chiang055422d2010-02-02 19:07:49 +0000793 cdev_del(&uverbs_dev->cdev);
Alexander Chiang6d6a0e72010-02-02 19:08:09 +0000794 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
795 clear_bit(devnum, dev_map);
796 else
797 clear_bit(devnum, overflow_map);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700798
799err:
Roland Dreier70a30e12005-10-28 15:38:26 -0700800 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
Jack Morgensteinfd60ae42006-08-03 10:56:42 -0700801 wait_for_completion(&uverbs_dev->comp);
802 kfree(uverbs_dev);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700803 return;
804}
805
806static void ib_uverbs_remove_one(struct ib_device *device)
807{
808 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
809
810 if (!uverbs_dev)
811 return;
812
Tony Jonesf4e91eb2008-02-22 00:13:36 +0100813 dev_set_drvdata(uverbs_dev->dev, NULL);
Alexander Chiang055422d2010-02-02 19:07:49 +0000814 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
815 cdev_del(&uverbs_dev->cdev);
Roland Dreier70a30e12005-10-28 15:38:26 -0700816
Alexander Chiang6d6a0e72010-02-02 19:08:09 +0000817 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
818 clear_bit(uverbs_dev->devnum, dev_map);
819 else
820 clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map);
Jack Morgensteinfd60ae42006-08-03 10:56:42 -0700821
Roland Dreier70a30e12005-10-28 15:38:26 -0700822 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
Jack Morgensteinfd60ae42006-08-03 10:56:42 -0700823 wait_for_completion(&uverbs_dev->comp);
824 kfree(uverbs_dev);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700825}
826
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700827static int __init ib_uverbs_init(void)
828{
829 int ret;
830
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700831 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
832 "infiniband_verbs");
833 if (ret) {
834 printk(KERN_ERR "user_verbs: couldn't register device number\n");
835 goto out;
836 }
837
Roland Dreier70a30e12005-10-28 15:38:26 -0700838 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
839 if (IS_ERR(uverbs_class)) {
840 ret = PTR_ERR(uverbs_class);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700841 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
842 goto out_chrdev;
843 }
844
Andi Kleen0933e2d2010-01-05 12:48:09 +0100845 ret = class_create_file(uverbs_class, &class_attr_abi_version.attr);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700846 if (ret) {
847 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
848 goto out_class;
849 }
850
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700851 ret = ib_register_client(&uverbs_client);
852 if (ret) {
853 printk(KERN_ERR "user_verbs: couldn't register client\n");
Roland Dreiera265e552010-02-24 16:51:20 -0800854 goto out_class;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700855 }
856
857 return 0;
858
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700859out_class:
Roland Dreier70a30e12005-10-28 15:38:26 -0700860 class_destroy(uverbs_class);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700861
862out_chrdev:
863 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
864
865out:
866 return ret;
867}
868
869static void __exit ib_uverbs_cleanup(void)
870{
871 ib_unregister_client(&uverbs_client);
Roland Dreier70a30e12005-10-28 15:38:26 -0700872 class_destroy(uverbs_class);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700873 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
Alexander Chiang6d6a0e72010-02-02 19:08:09 +0000874 if (overflow_maj)
875 unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES);
Roland Dreier5d7edb32005-10-24 10:53:25 -0700876 idr_destroy(&ib_uverbs_pd_idr);
877 idr_destroy(&ib_uverbs_mr_idr);
878 idr_destroy(&ib_uverbs_mw_idr);
879 idr_destroy(&ib_uverbs_ah_idr);
880 idr_destroy(&ib_uverbs_cq_idr);
881 idr_destroy(&ib_uverbs_qp_idr);
882 idr_destroy(&ib_uverbs_srq_idr);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700883}
884
885module_init(ib_uverbs_init);
886module_exit(ib_uverbs_cleanup);