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bc38a6ab RD |
1 | /* |
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. |
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 | #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> | |
a99bbaf5 | 43 | #include <linux/sched.h> |
bc38a6ab | 44 | #include <linux/file.h> |
70a30e16 | 45 | #include <linux/cdev.h> |
a265e558 | 46 | #include <linux/anon_inodes.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
bc38a6ab RD |
48 | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | #include "uverbs.h" | |
52 | ||
53 | MODULE_AUTHOR("Roland Dreier"); | |
54 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
bc38a6ab RD |
57 | enum { |
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 | ||
70a30e16 RD |
65 | static struct class *uverbs_class; |
66 | ||
9ead190b | 67 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
68 | DEFINE_IDR(ib_uverbs_pd_idr); |
69 | DEFINE_IDR(ib_uverbs_mr_idr); | |
70 | DEFINE_IDR(ib_uverbs_mw_idr); | |
71 | DEFINE_IDR(ib_uverbs_ah_idr); | |
72 | DEFINE_IDR(ib_uverbs_cq_idr); | |
73 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 74 | DEFINE_IDR(ib_uverbs_srq_idr); |
53d0bd1e | 75 | DEFINE_IDR(ib_uverbs_xrcd_idr); |
436f2ad0 | 76 | DEFINE_IDR(ib_uverbs_rule_idr); |
bc38a6ab | 77 | |
6276e08a | 78 | static DEFINE_SPINLOCK(map_lock); |
bc38a6ab RD |
79 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
80 | ||
81 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
82 | const char __user *buf, int in_len, | |
83 | int out_len) = { | |
9afed76d AC |
84 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
85 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
86 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
87 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
88 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
89 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
90 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, | |
6b52a12b SM |
91 | [IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw, |
92 | [IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw, | |
6b73597e | 93 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
9afed76d AC |
94 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
95 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, | |
96 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, | |
97 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
98 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, | |
99 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
100 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, | |
101 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, | |
102 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
103 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, | |
104 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
105 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
106 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
107 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
108 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, | |
109 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
110 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
111 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
112 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, | |
113 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, | |
53d0bd1e SH |
114 | [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrcd, |
115 | [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrcd, | |
42849b26 | 116 | [IB_USER_VERBS_CMD_CREATE_XSRQ] = ib_uverbs_create_xsrq, |
436f2ad0 | 117 | [IB_USER_VERBS_CMD_OPEN_QP] = ib_uverbs_open_qp, |
7afbddfa | 118 | #ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING |
436f2ad0 HHZ |
119 | [IB_USER_VERBS_CMD_CREATE_FLOW] = ib_uverbs_create_flow, |
120 | [IB_USER_VERBS_CMD_DESTROY_FLOW] = ib_uverbs_destroy_flow | |
7afbddfa | 121 | #endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */ |
bc38a6ab RD |
122 | }; |
123 | ||
bc38a6ab RD |
124 | static void ib_uverbs_add_one(struct ib_device *device); |
125 | static void ib_uverbs_remove_one(struct ib_device *device); | |
126 | ||
70a30e16 RD |
127 | static void ib_uverbs_release_dev(struct kref *ref) |
128 | { | |
129 | struct ib_uverbs_device *dev = | |
130 | container_of(ref, struct ib_uverbs_device, ref); | |
131 | ||
fd60ae40 | 132 | complete(&dev->comp); |
70a30e16 RD |
133 | } |
134 | ||
04d29b0e RD |
135 | static void ib_uverbs_release_event_file(struct kref *ref) |
136 | { | |
137 | struct ib_uverbs_event_file *file = | |
138 | container_of(ref, struct ib_uverbs_event_file, ref); | |
139 | ||
140 | kfree(file); | |
141 | } | |
142 | ||
70a30e16 RD |
143 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
144 | struct ib_uverbs_event_file *ev_file, | |
145 | struct ib_ucq_object *uobj) | |
146 | { | |
147 | struct ib_uverbs_event *evt, *tmp; | |
148 | ||
149 | if (ev_file) { | |
150 | spin_lock_irq(&ev_file->lock); | |
151 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
152 | list_del(&evt->list); | |
153 | kfree(evt); | |
154 | } | |
155 | spin_unlock_irq(&ev_file->lock); | |
156 | ||
157 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
158 | } | |
159 | ||
160 | spin_lock_irq(&file->async_file->lock); | |
161 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
162 | list_del(&evt->list); | |
163 | kfree(evt); | |
164 | } | |
165 | spin_unlock_irq(&file->async_file->lock); | |
166 | } | |
167 | ||
168 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
169 | struct ib_uevent_object *uobj) | |
170 | { | |
171 | struct ib_uverbs_event *evt, *tmp; | |
172 | ||
173 | spin_lock_irq(&file->async_file->lock); | |
174 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
175 | list_del(&evt->list); | |
176 | kfree(evt); | |
177 | } | |
178 | spin_unlock_irq(&file->async_file->lock); | |
179 | } | |
180 | ||
f4e40156 JM |
181 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
182 | struct ib_uqp_object *uobj) | |
183 | { | |
184 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
185 | ||
186 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
187 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
188 | list_del(&mcast->list); | |
189 | kfree(mcast); | |
190 | } | |
191 | } | |
192 | ||
70a30e16 RD |
193 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
194 | struct ib_ucontext *context) | |
bc38a6ab RD |
195 | { |
196 | struct ib_uobject *uobj, *tmp; | |
197 | ||
198 | if (!context) | |
199 | return 0; | |
200 | ||
f7c6a7b5 RD |
201 | context->closing = 1; |
202 | ||
67cdb40c | 203 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
204 | struct ib_ah *ah = uobj->object; |
205 | ||
206 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 207 | ib_destroy_ah(ah); |
67cdb40c RD |
208 | kfree(uobj); |
209 | } | |
bc38a6ab | 210 | |
6b52a12b SM |
211 | /* Remove MWs before QPs, in order to support type 2A MWs. */ |
212 | list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) { | |
213 | struct ib_mw *mw = uobj->object; | |
214 | ||
215 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); | |
216 | ib_dealloc_mw(mw); | |
217 | kfree(uobj); | |
218 | } | |
219 | ||
436f2ad0 HHZ |
220 | list_for_each_entry_safe(uobj, tmp, &context->rule_list, list) { |
221 | struct ib_flow *flow_id = uobj->object; | |
222 | ||
223 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); | |
224 | ib_destroy_flow(flow_id); | |
225 | kfree(uobj); | |
226 | } | |
227 | ||
bc38a6ab | 228 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
9ead190b | 229 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
230 | struct ib_uqp_object *uqp = |
231 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
232 | |
233 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
0e0ec7e0 SH |
234 | if (qp != qp->real_qp) { |
235 | ib_close_qp(qp); | |
b93f3c18 SH |
236 | } else { |
237 | ib_uverbs_detach_umcast(qp, uqp); | |
238 | ib_destroy_qp(qp); | |
239 | } | |
f4e40156 JM |
240 | ib_uverbs_release_uevent(file, &uqp->uevent); |
241 | kfree(uqp); | |
bc38a6ab RD |
242 | } |
243 | ||
244 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 245 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
246 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
247 | struct ib_ucq_object *ucq = | |
248 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
249 | |
250 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 251 | ib_destroy_cq(cq); |
70a30e16 RD |
252 | ib_uverbs_release_ucq(file, ev_file, ucq); |
253 | kfree(ucq); | |
bc38a6ab RD |
254 | } |
255 | ||
f520ba5a | 256 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 257 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
258 | struct ib_uevent_object *uevent = |
259 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
260 | |
261 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 262 | ib_destroy_srq(srq); |
70a30e16 RD |
263 | ib_uverbs_release_uevent(file, uevent); |
264 | kfree(uevent); | |
f520ba5a RD |
265 | } |
266 | ||
bc38a6ab | 267 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
9ead190b | 268 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 269 | |
9ead190b | 270 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 271 | ib_dereg_mr(mr); |
f7c6a7b5 | 272 | kfree(uobj); |
bc38a6ab RD |
273 | } |
274 | ||
53d0bd1e SH |
275 | mutex_lock(&file->device->xrcd_tree_mutex); |
276 | list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) { | |
277 | struct ib_xrcd *xrcd = uobj->object; | |
278 | struct ib_uxrcd_object *uxrcd = | |
279 | container_of(uobj, struct ib_uxrcd_object, uobject); | |
280 | ||
281 | idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); | |
282 | ib_uverbs_dealloc_xrcd(file->device, xrcd); | |
283 | kfree(uxrcd); | |
284 | } | |
285 | mutex_unlock(&file->device->xrcd_tree_mutex); | |
286 | ||
bc38a6ab | 287 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
9ead190b RD |
288 | struct ib_pd *pd = uobj->object; |
289 | ||
290 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 291 | ib_dealloc_pd(pd); |
bc38a6ab RD |
292 | kfree(uobj); |
293 | } | |
294 | ||
bc38a6ab RD |
295 | return context->device->dealloc_ucontext(context); |
296 | } | |
297 | ||
298 | static void ib_uverbs_release_file(struct kref *ref) | |
299 | { | |
300 | struct ib_uverbs_file *file = | |
301 | container_of(ref, struct ib_uverbs_file, ref); | |
302 | ||
303 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
304 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
305 | ||
bc38a6ab RD |
306 | kfree(file); |
307 | } | |
308 | ||
309 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
310 | size_t count, loff_t *pos) | |
311 | { | |
312 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 313 | struct ib_uverbs_event *event; |
bc38a6ab RD |
314 | int eventsz; |
315 | int ret = 0; | |
316 | ||
317 | spin_lock_irq(&file->lock); | |
318 | ||
6b73597e | 319 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
320 | spin_unlock_irq(&file->lock); |
321 | ||
322 | if (filp->f_flags & O_NONBLOCK) | |
323 | return -EAGAIN; | |
324 | ||
325 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 326 | !list_empty(&file->event_list))) |
bc38a6ab RD |
327 | return -ERESTARTSYS; |
328 | ||
329 | spin_lock_irq(&file->lock); | |
330 | } | |
331 | ||
63aaf647 RD |
332 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
333 | ||
334 | if (file->is_async) | |
bc38a6ab | 335 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 336 | else |
bc38a6ab | 337 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
338 | |
339 | if (eventsz > count) { | |
340 | ret = -EINVAL; | |
341 | event = NULL; | |
63aaf647 | 342 | } else { |
bc38a6ab | 343 | list_del(file->event_list.next); |
63aaf647 RD |
344 | if (event->counter) { |
345 | ++(*event->counter); | |
346 | list_del(&event->obj_list); | |
347 | } | |
348 | } | |
bc38a6ab RD |
349 | |
350 | spin_unlock_irq(&file->lock); | |
351 | ||
352 | if (event) { | |
353 | if (copy_to_user(buf, event, eventsz)) | |
354 | ret = -EFAULT; | |
355 | else | |
356 | ret = eventsz; | |
357 | } | |
358 | ||
359 | kfree(event); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
365 | struct poll_table_struct *wait) | |
366 | { | |
367 | unsigned int pollflags = 0; | |
368 | struct ib_uverbs_event_file *file = filp->private_data; | |
369 | ||
370 | poll_wait(filp, &file->poll_wait, wait); | |
371 | ||
372 | spin_lock_irq(&file->lock); | |
6b73597e | 373 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
374 | pollflags = POLLIN | POLLRDNORM; |
375 | spin_unlock_irq(&file->lock); | |
376 | ||
377 | return pollflags; | |
378 | } | |
379 | ||
abdf119b GN |
380 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
381 | { | |
382 | struct ib_uverbs_event_file *file = filp->private_data; | |
383 | ||
384 | return fasync_helper(fd, filp, on, &file->async_queue); | |
385 | } | |
386 | ||
bc38a6ab RD |
387 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
388 | { | |
389 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
390 | struct ib_uverbs_event *entry, *tmp; |
391 | ||
392 | spin_lock_irq(&file->lock); | |
1ae5c187 | 393 | file->is_closed = 1; |
6b73597e RD |
394 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
395 | if (entry->counter) | |
396 | list_del(&entry->obj_list); | |
397 | kfree(entry); | |
398 | } | |
399 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 400 | |
6b73597e RD |
401 | if (file->is_async) { |
402 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
403 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
404 | } | |
405 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
2b8693c0 | 410 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 411 | .owner = THIS_MODULE, |
9afed76d | 412 | .read = ib_uverbs_event_read, |
bc38a6ab | 413 | .poll = ib_uverbs_event_poll, |
abdf119b | 414 | .release = ib_uverbs_event_close, |
bc1db9af RD |
415 | .fasync = ib_uverbs_event_fasync, |
416 | .llseek = no_llseek, | |
bc38a6ab RD |
417 | }; |
418 | ||
419 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
420 | { | |
6b73597e RD |
421 | struct ib_uverbs_event_file *file = cq_context; |
422 | struct ib_ucq_object *uobj; | |
423 | struct ib_uverbs_event *entry; | |
424 | unsigned long flags; | |
425 | ||
426 | if (!file) | |
427 | return; | |
428 | ||
429 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 430 | if (file->is_closed) { |
6b73597e RD |
431 | spin_unlock_irqrestore(&file->lock, flags); |
432 | return; | |
433 | } | |
bc38a6ab RD |
434 | |
435 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
436 | if (!entry) { |
437 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 438 | return; |
305a7e87 | 439 | } |
bc38a6ab | 440 | |
63aaf647 RD |
441 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
442 | ||
443 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
444 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 445 | |
6b73597e | 446 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 447 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 448 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 449 | |
6b73597e RD |
450 | wake_up_interruptible(&file->poll_wait); |
451 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
452 | } |
453 | ||
454 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
455 | __u64 element, __u64 event, |
456 | struct list_head *obj_list, | |
457 | u32 *counter) | |
bc38a6ab | 458 | { |
63aaf647 | 459 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
460 | unsigned long flags; |
461 | ||
6b73597e | 462 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 463 | if (file->async_file->is_closed) { |
6b73597e RD |
464 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
465 | return; | |
466 | } | |
467 | ||
bc38a6ab | 468 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
469 | if (!entry) { |
470 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 471 | return; |
305a7e87 | 472 | } |
bc38a6ab | 473 | |
63aaf647 RD |
474 | entry->desc.async.element = element; |
475 | entry->desc.async.event_type = event; | |
476 | entry->counter = counter; | |
bc38a6ab | 477 | |
6b73597e | 478 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
479 | if (obj_list) |
480 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 481 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 482 | |
6b73597e RD |
483 | wake_up_interruptible(&file->async_file->poll_wait); |
484 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
485 | } |
486 | ||
487 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
488 | { | |
7162a3e0 RD |
489 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
490 | struct ib_ucq_object, uobject); | |
63aaf647 | 491 | |
7162a3e0 | 492 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
493 | event->event, &uobj->async_list, |
494 | &uobj->async_events_reported); | |
bc38a6ab RD |
495 | } |
496 | ||
497 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
498 | { | |
63aaf647 RD |
499 | struct ib_uevent_object *uobj; |
500 | ||
501 | uobj = container_of(event->element.qp->uobject, | |
502 | struct ib_uevent_object, uobject); | |
503 | ||
504 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
505 | event->event, &uobj->event_list, | |
506 | &uobj->events_reported); | |
bc38a6ab RD |
507 | } |
508 | ||
f520ba5a RD |
509 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
510 | { | |
63aaf647 RD |
511 | struct ib_uevent_object *uobj; |
512 | ||
513 | uobj = container_of(event->element.srq->uobject, | |
514 | struct ib_uevent_object, uobject); | |
515 | ||
516 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
517 | event->event, &uobj->event_list, | |
518 | &uobj->events_reported); | |
f520ba5a RD |
519 | } |
520 | ||
6b73597e RD |
521 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
522 | struct ib_event *event) | |
bc38a6ab RD |
523 | { |
524 | struct ib_uverbs_file *file = | |
525 | container_of(handler, struct ib_uverbs_file, event_handler); | |
526 | ||
63aaf647 RD |
527 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
528 | NULL, NULL); | |
bc38a6ab RD |
529 | } |
530 | ||
6b73597e | 531 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
b1e4594b | 532 | int is_async) |
bc38a6ab | 533 | { |
6b73597e | 534 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab RD |
535 | struct file *filp; |
536 | ||
6b73597e RD |
537 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
538 | if (!ev_file) | |
539 | return ERR_PTR(-ENOMEM); | |
540 | ||
541 | kref_init(&ev_file->ref); | |
542 | spin_lock_init(&ev_file->lock); | |
543 | INIT_LIST_HEAD(&ev_file->event_list); | |
544 | init_waitqueue_head(&ev_file->poll_wait); | |
545 | ev_file->uverbs_file = uverbs_file; | |
546 | ev_file->async_queue = NULL; | |
547 | ev_file->is_async = is_async; | |
1ae5c187 | 548 | ev_file->is_closed = 0; |
6b73597e | 549 | |
b1e4594b | 550 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
a265e558 | 551 | ev_file, O_RDONLY); |
b1e4594b AV |
552 | if (IS_ERR(filp)) |
553 | kfree(ev_file); | |
a7dab9e8 | 554 | |
6b73597e | 555 | return filp; |
6b73597e RD |
556 | } |
557 | ||
558 | /* | |
559 | * Look up a completion event file by FD. If lookup is successful, | |
560 | * takes a ref to the event file struct that it returns; if | |
561 | * unsuccessful, returns NULL. | |
562 | */ | |
563 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
564 | { | |
565 | struct ib_uverbs_event_file *ev_file = NULL; | |
2903ff01 | 566 | struct fd f = fdget(fd); |
6b73597e | 567 | |
2903ff01 | 568 | if (!f.file) |
6b73597e RD |
569 | return NULL; |
570 | ||
2903ff01 | 571 | if (f.file->f_op != &uverbs_event_fops) |
6b73597e RD |
572 | goto out; |
573 | ||
2903ff01 | 574 | ev_file = f.file->private_data; |
6b73597e RD |
575 | if (ev_file->is_async) { |
576 | ev_file = NULL; | |
577 | goto out; | |
578 | } | |
579 | ||
580 | kref_get(&ev_file->ref); | |
581 | ||
582 | out: | |
2903ff01 | 583 | fdput(f); |
6b73597e | 584 | return ev_file; |
bc38a6ab RD |
585 | } |
586 | ||
587 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
588 | size_t count, loff_t *pos) | |
589 | { | |
590 | struct ib_uverbs_file *file = filp->private_data; | |
591 | struct ib_uverbs_cmd_hdr hdr; | |
592 | ||
593 | if (count < sizeof hdr) | |
594 | return -EINVAL; | |
595 | ||
596 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
597 | return -EFAULT; | |
598 | ||
caf6e3f2 | 599 | if (hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || |
b1b8afb8 | 600 | !uverbs_cmd_table[hdr.command]) |
bc38a6ab RD |
601 | return -EINVAL; |
602 | ||
6b73597e | 603 | if (!file->ucontext && |
bc38a6ab RD |
604 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
605 | return -EINVAL; | |
606 | ||
b1b8afb8 JM |
607 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) |
608 | return -ENOSYS; | |
609 | ||
7afbddfa | 610 | #ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING |
400dbc96 II |
611 | if (hdr.command >= IB_USER_VERBS_CMD_THRESHOLD) { |
612 | struct ib_uverbs_cmd_hdr_ex hdr_ex; | |
613 | ||
614 | if (copy_from_user(&hdr_ex, buf, sizeof(hdr_ex))) | |
615 | return -EFAULT; | |
616 | ||
617 | if (((hdr_ex.in_words + hdr_ex.provider_in_words) * 4) != count) | |
618 | return -EINVAL; | |
619 | ||
620 | return uverbs_cmd_table[hdr.command](file, | |
621 | buf + sizeof(hdr_ex), | |
622 | (hdr_ex.in_words + | |
623 | hdr_ex.provider_in_words) * 4, | |
624 | (hdr_ex.out_words + | |
625 | hdr_ex.provider_out_words) * 4); | |
626 | } else { | |
7afbddfa | 627 | #endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */ |
400dbc96 II |
628 | if (hdr.in_words * 4 != count) |
629 | return -EINVAL; | |
630 | ||
631 | return uverbs_cmd_table[hdr.command](file, | |
632 | buf + sizeof(hdr), | |
633 | hdr.in_words * 4, | |
634 | hdr.out_words * 4); | |
7afbddfa | 635 | #ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING |
400dbc96 | 636 | } |
7afbddfa | 637 | #endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */ |
bc38a6ab RD |
638 | } |
639 | ||
640 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
641 | { | |
642 | struct ib_uverbs_file *file = filp->private_data; | |
643 | ||
644 | if (!file->ucontext) | |
645 | return -ENODEV; | |
646 | else | |
647 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
648 | } | |
649 | ||
5b2d281a RD |
650 | /* |
651 | * ib_uverbs_open() does not need the BKL: | |
652 | * | |
2a72f212 | 653 | * - the ib_uverbs_device structures are properly reference counted and |
5b2d281a RD |
654 | * everything else is purely local to the file being created, so |
655 | * races against other open calls are not a problem; | |
656 | * - there is no ioctl method to race against; | |
2a72f212 AC |
657 | * - the open method will either immediately run -ENXIO, or all |
658 | * required initialization will be done. | |
5b2d281a | 659 | */ |
bc38a6ab RD |
660 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
661 | { | |
70a30e16 | 662 | struct ib_uverbs_device *dev; |
bc38a6ab | 663 | struct ib_uverbs_file *file; |
70a30e16 | 664 | int ret; |
bc38a6ab | 665 | |
2a72f212 | 666 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
70a30e16 RD |
667 | if (dev) |
668 | kref_get(&dev->ref); | |
2a72f212 | 669 | else |
70a30e16 RD |
670 | return -ENXIO; |
671 | ||
672 | if (!try_module_get(dev->ib_dev->owner)) { | |
673 | ret = -ENODEV; | |
674 | goto err; | |
675 | } | |
bc38a6ab | 676 | |
6b73597e | 677 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 678 | if (!file) { |
70a30e16 RD |
679 | ret = -ENOMEM; |
680 | goto err_module; | |
63c47c28 | 681 | } |
bc38a6ab | 682 | |
70a30e16 RD |
683 | file->device = dev; |
684 | file->ucontext = NULL; | |
685 | file->async_file = NULL; | |
bc38a6ab | 686 | kref_init(&file->ref); |
95ed644f | 687 | mutex_init(&file->mutex); |
bc38a6ab | 688 | |
bc38a6ab RD |
689 | filp->private_data = file; |
690 | ||
bc1db9af | 691 | return nonseekable_open(inode, filp); |
70a30e16 RD |
692 | |
693 | err_module: | |
694 | module_put(dev->ib_dev->owner); | |
695 | ||
696 | err: | |
697 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 698 | return ret; |
bc38a6ab RD |
699 | } |
700 | ||
701 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
702 | { | |
703 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 704 | |
70a30e16 RD |
705 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
706 | ||
707 | if (file->async_file) | |
708 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 709 | |
bc38a6ab RD |
710 | kref_put(&file->ref, ib_uverbs_release_file); |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
2b8693c0 | 715 | static const struct file_operations uverbs_fops = { |
9afed76d AC |
716 | .owner = THIS_MODULE, |
717 | .write = ib_uverbs_write, | |
718 | .open = ib_uverbs_open, | |
bc1db9af RD |
719 | .release = ib_uverbs_close, |
720 | .llseek = no_llseek, | |
bc38a6ab RD |
721 | }; |
722 | ||
2b8693c0 | 723 | static const struct file_operations uverbs_mmap_fops = { |
9afed76d AC |
724 | .owner = THIS_MODULE, |
725 | .write = ib_uverbs_write, | |
bc38a6ab | 726 | .mmap = ib_uverbs_mmap, |
9afed76d | 727 | .open = ib_uverbs_open, |
bc1db9af RD |
728 | .release = ib_uverbs_close, |
729 | .llseek = no_llseek, | |
bc38a6ab RD |
730 | }; |
731 | ||
732 | static struct ib_client uverbs_client = { | |
733 | .name = "uverbs", | |
734 | .add = ib_uverbs_add_one, | |
735 | .remove = ib_uverbs_remove_one | |
736 | }; | |
737 | ||
f4e91eb4 TJ |
738 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
739 | char *buf) | |
bc38a6ab | 740 | { |
f4e91eb4 | 741 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
742 | |
743 | if (!dev) | |
744 | return -ENODEV; | |
bc38a6ab RD |
745 | |
746 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
747 | } | |
f4e91eb4 | 748 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 749 | |
f4e91eb4 TJ |
750 | static ssize_t show_dev_abi_version(struct device *device, |
751 | struct device_attribute *attr, char *buf) | |
274c0891 | 752 | { |
f4e91eb4 | 753 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
754 | |
755 | if (!dev) | |
756 | return -ENODEV; | |
274c0891 RD |
757 | |
758 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
759 | } | |
f4e91eb4 | 760 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 761 | |
0933e2d9 AK |
762 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
763 | __stringify(IB_USER_VERBS_ABI_VERSION)); | |
bc38a6ab | 764 | |
6d6a0e71 AC |
765 | static dev_t overflow_maj; |
766 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); | |
767 | ||
768 | /* | |
769 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by | |
770 | * requesting a new major number and doubling the number of max devices we | |
771 | * support. It's stupid, but simple. | |
772 | */ | |
773 | static int find_overflow_devnum(void) | |
774 | { | |
775 | int ret; | |
776 | ||
777 | if (!overflow_maj) { | |
778 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, | |
779 | "infiniband_verbs"); | |
780 | if (ret) { | |
781 | printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n"); | |
782 | return ret; | |
783 | } | |
784 | } | |
785 | ||
786 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); | |
787 | if (ret >= IB_UVERBS_MAX_DEVICES) | |
788 | return -1; | |
789 | ||
790 | return ret; | |
791 | } | |
792 | ||
bc38a6ab RD |
793 | static void ib_uverbs_add_one(struct ib_device *device) |
794 | { | |
38707980 | 795 | int devnum; |
ddbd6883 | 796 | dev_t base; |
bc38a6ab RD |
797 | struct ib_uverbs_device *uverbs_dev; |
798 | ||
799 | if (!device->alloc_ucontext) | |
800 | return; | |
801 | ||
de6eb66b | 802 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
803 | if (!uverbs_dev) |
804 | return; | |
805 | ||
70a30e16 | 806 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 807 | init_completion(&uverbs_dev->comp); |
53d0bd1e SH |
808 | uverbs_dev->xrcd_tree = RB_ROOT; |
809 | mutex_init(&uverbs_dev->xrcd_tree_mutex); | |
70a30e16 | 810 | |
bc38a6ab | 811 | spin_lock(&map_lock); |
38707980 AC |
812 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
813 | if (devnum >= IB_UVERBS_MAX_DEVICES) { | |
bc38a6ab | 814 | spin_unlock(&map_lock); |
6d6a0e71 AC |
815 | devnum = find_overflow_devnum(); |
816 | if (devnum < 0) | |
817 | goto err; | |
818 | ||
819 | spin_lock(&map_lock); | |
820 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; | |
821 | base = devnum + overflow_maj; | |
822 | set_bit(devnum, overflow_map); | |
823 | } else { | |
824 | uverbs_dev->devnum = devnum; | |
825 | base = devnum + IB_UVERBS_BASE_DEV; | |
826 | set_bit(devnum, dev_map); | |
bc38a6ab | 827 | } |
bc38a6ab RD |
828 | spin_unlock(&map_lock); |
829 | ||
6b73597e | 830 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 831 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 832 | |
055422dd AC |
833 | cdev_init(&uverbs_dev->cdev, NULL); |
834 | uverbs_dev->cdev.owner = THIS_MODULE; | |
835 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
836 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); | |
ddbd6883 | 837 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
70a30e16 | 838 | goto err_cdev; |
bc38a6ab | 839 | |
91bd418f | 840 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
055422dd | 841 | uverbs_dev->cdev.dev, uverbs_dev, |
91bd418f | 842 | "uverbs%d", uverbs_dev->devnum); |
f4e91eb4 | 843 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
844 | goto err_cdev; |
845 | ||
f4e91eb4 | 846 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 847 | goto err_class; |
f4e91eb4 | 848 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 849 | goto err_class; |
bc38a6ab RD |
850 | |
851 | ib_set_client_data(device, &uverbs_client, uverbs_dev); | |
852 | ||
853 | return; | |
854 | ||
855 | err_class: | |
055422dd | 856 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
bc38a6ab RD |
857 | |
858 | err_cdev: | |
055422dd | 859 | cdev_del(&uverbs_dev->cdev); |
6d6a0e71 AC |
860 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
861 | clear_bit(devnum, dev_map); | |
862 | else | |
863 | clear_bit(devnum, overflow_map); | |
bc38a6ab RD |
864 | |
865 | err: | |
70a30e16 | 866 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
867 | wait_for_completion(&uverbs_dev->comp); |
868 | kfree(uverbs_dev); | |
bc38a6ab RD |
869 | return; |
870 | } | |
871 | ||
872 | static void ib_uverbs_remove_one(struct ib_device *device) | |
873 | { | |
874 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
875 | ||
876 | if (!uverbs_dev) | |
877 | return; | |
878 | ||
f4e91eb4 | 879 | dev_set_drvdata(uverbs_dev->dev, NULL); |
055422dd AC |
880 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
881 | cdev_del(&uverbs_dev->cdev); | |
70a30e16 | 882 | |
6d6a0e71 AC |
883 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
884 | clear_bit(uverbs_dev->devnum, dev_map); | |
885 | else | |
886 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); | |
fd60ae40 | 887 | |
70a30e16 | 888 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
889 | wait_for_completion(&uverbs_dev->comp); |
890 | kfree(uverbs_dev); | |
bc38a6ab RD |
891 | } |
892 | ||
2c9ede55 | 893 | static char *uverbs_devnode(struct device *dev, umode_t *mode) |
71c29bd5 | 894 | { |
b2bc4782 GR |
895 | if (mode) |
896 | *mode = 0666; | |
71c29bd5 RD |
897 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
898 | } | |
899 | ||
bc38a6ab RD |
900 | static int __init ib_uverbs_init(void) |
901 | { | |
902 | int ret; | |
903 | ||
bc38a6ab RD |
904 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
905 | "infiniband_verbs"); | |
906 | if (ret) { | |
907 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
908 | goto out; | |
909 | } | |
910 | ||
70a30e16 RD |
911 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
912 | if (IS_ERR(uverbs_class)) { | |
913 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
914 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
915 | goto out_chrdev; | |
916 | } | |
917 | ||
71c29bd5 RD |
918 | uverbs_class->devnode = uverbs_devnode; |
919 | ||
0933e2d9 | 920 | ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); |
bc38a6ab RD |
921 | if (ret) { |
922 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
923 | goto out_class; | |
924 | } | |
925 | ||
bc38a6ab RD |
926 | ret = ib_register_client(&uverbs_client); |
927 | if (ret) { | |
928 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
a265e558 | 929 | goto out_class; |
bc38a6ab RD |
930 | } |
931 | ||
932 | return 0; | |
933 | ||
bc38a6ab | 934 | out_class: |
70a30e16 | 935 | class_destroy(uverbs_class); |
bc38a6ab RD |
936 | |
937 | out_chrdev: | |
938 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
939 | ||
940 | out: | |
941 | return ret; | |
942 | } | |
943 | ||
944 | static void __exit ib_uverbs_cleanup(void) | |
945 | { | |
946 | ib_unregister_client(&uverbs_client); | |
70a30e16 | 947 | class_destroy(uverbs_class); |
bc38a6ab | 948 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
6d6a0e71 AC |
949 | if (overflow_maj) |
950 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); | |
5d7edb3c RD |
951 | idr_destroy(&ib_uverbs_pd_idr); |
952 | idr_destroy(&ib_uverbs_mr_idr); | |
953 | idr_destroy(&ib_uverbs_mw_idr); | |
954 | idr_destroy(&ib_uverbs_ah_idr); | |
955 | idr_destroy(&ib_uverbs_cq_idr); | |
956 | idr_destroy(&ib_uverbs_qp_idr); | |
957 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
958 | } |
959 | ||
960 | module_init(ib_uverbs_init); | |
961 | module_exit(ib_uverbs_cleanup); |