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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, | |
7e6edb9b | 90 | [IB_USER_VERBS_CMD_REREG_MR] = ib_uverbs_rereg_mr, |
9afed76d | 91 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, |
6b52a12b SM |
92 | [IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw, |
93 | [IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw, | |
6b73597e | 94 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
9afed76d AC |
95 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
96 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, | |
97 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, | |
98 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
99 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, | |
100 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
101 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, | |
102 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, | |
103 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
104 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, | |
105 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
106 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
107 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
108 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
109 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, | |
110 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
111 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
112 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
113 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, | |
114 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, | |
53d0bd1e SH |
115 | [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrcd, |
116 | [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrcd, | |
42849b26 | 117 | [IB_USER_VERBS_CMD_CREATE_XSRQ] = ib_uverbs_create_xsrq, |
436f2ad0 | 118 | [IB_USER_VERBS_CMD_OPEN_QP] = ib_uverbs_open_qp, |
f21519b2 YD |
119 | }; |
120 | ||
f21519b2 YD |
121 | static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file, |
122 | struct ib_udata *ucore, | |
123 | struct ib_udata *uhw) = { | |
124 | [IB_USER_VERBS_EX_CMD_CREATE_FLOW] = ib_uverbs_ex_create_flow, | |
5a77abf9 | 125 | [IB_USER_VERBS_EX_CMD_DESTROY_FLOW] = ib_uverbs_ex_destroy_flow, |
02d1aa7a | 126 | [IB_USER_VERBS_EX_CMD_QUERY_DEVICE] = ib_uverbs_ex_query_device, |
565197dd | 127 | [IB_USER_VERBS_EX_CMD_CREATE_CQ] = ib_uverbs_ex_create_cq, |
bc38a6ab RD |
128 | }; |
129 | ||
bc38a6ab RD |
130 | static void ib_uverbs_add_one(struct ib_device *device); |
131 | static void ib_uverbs_remove_one(struct ib_device *device); | |
132 | ||
70a30e16 RD |
133 | static void ib_uverbs_release_dev(struct kref *ref) |
134 | { | |
135 | struct ib_uverbs_device *dev = | |
136 | container_of(ref, struct ib_uverbs_device, ref); | |
137 | ||
fd60ae40 | 138 | complete(&dev->comp); |
70a30e16 RD |
139 | } |
140 | ||
04d29b0e RD |
141 | static void ib_uverbs_release_event_file(struct kref *ref) |
142 | { | |
143 | struct ib_uverbs_event_file *file = | |
144 | container_of(ref, struct ib_uverbs_event_file, ref); | |
145 | ||
146 | kfree(file); | |
147 | } | |
148 | ||
70a30e16 RD |
149 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
150 | struct ib_uverbs_event_file *ev_file, | |
151 | struct ib_ucq_object *uobj) | |
152 | { | |
153 | struct ib_uverbs_event *evt, *tmp; | |
154 | ||
155 | if (ev_file) { | |
156 | spin_lock_irq(&ev_file->lock); | |
157 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
158 | list_del(&evt->list); | |
159 | kfree(evt); | |
160 | } | |
161 | spin_unlock_irq(&ev_file->lock); | |
162 | ||
163 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
164 | } | |
165 | ||
166 | spin_lock_irq(&file->async_file->lock); | |
167 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
168 | list_del(&evt->list); | |
169 | kfree(evt); | |
170 | } | |
171 | spin_unlock_irq(&file->async_file->lock); | |
172 | } | |
173 | ||
174 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
175 | struct ib_uevent_object *uobj) | |
176 | { | |
177 | struct ib_uverbs_event *evt, *tmp; | |
178 | ||
179 | spin_lock_irq(&file->async_file->lock); | |
180 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
181 | list_del(&evt->list); | |
182 | kfree(evt); | |
183 | } | |
184 | spin_unlock_irq(&file->async_file->lock); | |
185 | } | |
186 | ||
f4e40156 JM |
187 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
188 | struct ib_uqp_object *uobj) | |
189 | { | |
190 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
191 | ||
192 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
193 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
194 | list_del(&mcast->list); | |
195 | kfree(mcast); | |
196 | } | |
197 | } | |
198 | ||
70a30e16 RD |
199 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
200 | struct ib_ucontext *context) | |
bc38a6ab RD |
201 | { |
202 | struct ib_uobject *uobj, *tmp; | |
203 | ||
204 | if (!context) | |
205 | return 0; | |
206 | ||
f7c6a7b5 RD |
207 | context->closing = 1; |
208 | ||
67cdb40c | 209 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
210 | struct ib_ah *ah = uobj->object; |
211 | ||
212 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 213 | ib_destroy_ah(ah); |
67cdb40c RD |
214 | kfree(uobj); |
215 | } | |
bc38a6ab | 216 | |
6b52a12b SM |
217 | /* Remove MWs before QPs, in order to support type 2A MWs. */ |
218 | list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) { | |
219 | struct ib_mw *mw = uobj->object; | |
220 | ||
221 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); | |
222 | ib_dealloc_mw(mw); | |
223 | kfree(uobj); | |
224 | } | |
225 | ||
436f2ad0 HHZ |
226 | list_for_each_entry_safe(uobj, tmp, &context->rule_list, list) { |
227 | struct ib_flow *flow_id = uobj->object; | |
228 | ||
229 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); | |
230 | ib_destroy_flow(flow_id); | |
231 | kfree(uobj); | |
232 | } | |
233 | ||
bc38a6ab | 234 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
9ead190b | 235 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
236 | struct ib_uqp_object *uqp = |
237 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
238 | |
239 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
0e0ec7e0 SH |
240 | if (qp != qp->real_qp) { |
241 | ib_close_qp(qp); | |
b93f3c18 SH |
242 | } else { |
243 | ib_uverbs_detach_umcast(qp, uqp); | |
244 | ib_destroy_qp(qp); | |
245 | } | |
f4e40156 JM |
246 | ib_uverbs_release_uevent(file, &uqp->uevent); |
247 | kfree(uqp); | |
bc38a6ab RD |
248 | } |
249 | ||
a233c4b5 SD |
250 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
251 | struct ib_srq *srq = uobj->object; | |
252 | struct ib_uevent_object *uevent = | |
253 | container_of(uobj, struct ib_uevent_object, uobject); | |
254 | ||
255 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
256 | ib_destroy_srq(srq); | |
257 | ib_uverbs_release_uevent(file, uevent); | |
258 | kfree(uevent); | |
259 | } | |
260 | ||
bc38a6ab | 261 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { |
9ead190b | 262 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
263 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
264 | struct ib_ucq_object *ucq = | |
265 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
266 | |
267 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 268 | ib_destroy_cq(cq); |
70a30e16 RD |
269 | ib_uverbs_release_ucq(file, ev_file, ucq); |
270 | kfree(ucq); | |
bc38a6ab RD |
271 | } |
272 | ||
bc38a6ab | 273 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
9ead190b | 274 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 275 | |
9ead190b | 276 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 277 | ib_dereg_mr(mr); |
f7c6a7b5 | 278 | kfree(uobj); |
bc38a6ab RD |
279 | } |
280 | ||
53d0bd1e SH |
281 | mutex_lock(&file->device->xrcd_tree_mutex); |
282 | list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) { | |
283 | struct ib_xrcd *xrcd = uobj->object; | |
284 | struct ib_uxrcd_object *uxrcd = | |
285 | container_of(uobj, struct ib_uxrcd_object, uobject); | |
286 | ||
287 | idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); | |
288 | ib_uverbs_dealloc_xrcd(file->device, xrcd); | |
289 | kfree(uxrcd); | |
290 | } | |
291 | mutex_unlock(&file->device->xrcd_tree_mutex); | |
292 | ||
bc38a6ab | 293 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
9ead190b RD |
294 | struct ib_pd *pd = uobj->object; |
295 | ||
296 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 297 | ib_dealloc_pd(pd); |
bc38a6ab RD |
298 | kfree(uobj); |
299 | } | |
300 | ||
8ada2c1c SR |
301 | put_pid(context->tgid); |
302 | ||
bc38a6ab RD |
303 | return context->device->dealloc_ucontext(context); |
304 | } | |
305 | ||
306 | static void ib_uverbs_release_file(struct kref *ref) | |
307 | { | |
308 | struct ib_uverbs_file *file = | |
309 | container_of(ref, struct ib_uverbs_file, ref); | |
310 | ||
311 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
312 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
313 | ||
bc38a6ab RD |
314 | kfree(file); |
315 | } | |
316 | ||
317 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
318 | size_t count, loff_t *pos) | |
319 | { | |
320 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 321 | struct ib_uverbs_event *event; |
bc38a6ab RD |
322 | int eventsz; |
323 | int ret = 0; | |
324 | ||
325 | spin_lock_irq(&file->lock); | |
326 | ||
6b73597e | 327 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
328 | spin_unlock_irq(&file->lock); |
329 | ||
330 | if (filp->f_flags & O_NONBLOCK) | |
331 | return -EAGAIN; | |
332 | ||
333 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 334 | !list_empty(&file->event_list))) |
bc38a6ab RD |
335 | return -ERESTARTSYS; |
336 | ||
337 | spin_lock_irq(&file->lock); | |
338 | } | |
339 | ||
63aaf647 RD |
340 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
341 | ||
342 | if (file->is_async) | |
bc38a6ab | 343 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 344 | else |
bc38a6ab | 345 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
346 | |
347 | if (eventsz > count) { | |
348 | ret = -EINVAL; | |
349 | event = NULL; | |
63aaf647 | 350 | } else { |
bc38a6ab | 351 | list_del(file->event_list.next); |
63aaf647 RD |
352 | if (event->counter) { |
353 | ++(*event->counter); | |
354 | list_del(&event->obj_list); | |
355 | } | |
356 | } | |
bc38a6ab RD |
357 | |
358 | spin_unlock_irq(&file->lock); | |
359 | ||
360 | if (event) { | |
361 | if (copy_to_user(buf, event, eventsz)) | |
362 | ret = -EFAULT; | |
363 | else | |
364 | ret = eventsz; | |
365 | } | |
366 | ||
367 | kfree(event); | |
368 | ||
369 | return ret; | |
370 | } | |
371 | ||
372 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
373 | struct poll_table_struct *wait) | |
374 | { | |
375 | unsigned int pollflags = 0; | |
376 | struct ib_uverbs_event_file *file = filp->private_data; | |
377 | ||
378 | poll_wait(filp, &file->poll_wait, wait); | |
379 | ||
380 | spin_lock_irq(&file->lock); | |
6b73597e | 381 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
382 | pollflags = POLLIN | POLLRDNORM; |
383 | spin_unlock_irq(&file->lock); | |
384 | ||
385 | return pollflags; | |
386 | } | |
387 | ||
abdf119b GN |
388 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
389 | { | |
390 | struct ib_uverbs_event_file *file = filp->private_data; | |
391 | ||
392 | return fasync_helper(fd, filp, on, &file->async_queue); | |
393 | } | |
394 | ||
bc38a6ab RD |
395 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
396 | { | |
397 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
398 | struct ib_uverbs_event *entry, *tmp; |
399 | ||
400 | spin_lock_irq(&file->lock); | |
1ae5c187 | 401 | file->is_closed = 1; |
6b73597e RD |
402 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
403 | if (entry->counter) | |
404 | list_del(&entry->obj_list); | |
405 | kfree(entry); | |
406 | } | |
407 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 408 | |
6b73597e RD |
409 | if (file->is_async) { |
410 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
411 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
412 | } | |
413 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
414 | |
415 | return 0; | |
416 | } | |
417 | ||
2b8693c0 | 418 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 419 | .owner = THIS_MODULE, |
9afed76d | 420 | .read = ib_uverbs_event_read, |
bc38a6ab | 421 | .poll = ib_uverbs_event_poll, |
abdf119b | 422 | .release = ib_uverbs_event_close, |
bc1db9af RD |
423 | .fasync = ib_uverbs_event_fasync, |
424 | .llseek = no_llseek, | |
bc38a6ab RD |
425 | }; |
426 | ||
427 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
428 | { | |
6b73597e RD |
429 | struct ib_uverbs_event_file *file = cq_context; |
430 | struct ib_ucq_object *uobj; | |
431 | struct ib_uverbs_event *entry; | |
432 | unsigned long flags; | |
433 | ||
434 | if (!file) | |
435 | return; | |
436 | ||
437 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 438 | if (file->is_closed) { |
6b73597e RD |
439 | spin_unlock_irqrestore(&file->lock, flags); |
440 | return; | |
441 | } | |
bc38a6ab RD |
442 | |
443 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
444 | if (!entry) { |
445 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 446 | return; |
305a7e87 | 447 | } |
bc38a6ab | 448 | |
63aaf647 RD |
449 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
450 | ||
451 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
452 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 453 | |
6b73597e | 454 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 455 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 456 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 457 | |
6b73597e RD |
458 | wake_up_interruptible(&file->poll_wait); |
459 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
460 | } |
461 | ||
462 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
463 | __u64 element, __u64 event, |
464 | struct list_head *obj_list, | |
465 | u32 *counter) | |
bc38a6ab | 466 | { |
63aaf647 | 467 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
468 | unsigned long flags; |
469 | ||
6b73597e | 470 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 471 | if (file->async_file->is_closed) { |
6b73597e RD |
472 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
473 | return; | |
474 | } | |
475 | ||
bc38a6ab | 476 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
477 | if (!entry) { |
478 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 479 | return; |
305a7e87 | 480 | } |
bc38a6ab | 481 | |
63aaf647 RD |
482 | entry->desc.async.element = element; |
483 | entry->desc.async.event_type = event; | |
377b5134 | 484 | entry->desc.async.reserved = 0; |
63aaf647 | 485 | entry->counter = counter; |
bc38a6ab | 486 | |
6b73597e | 487 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
488 | if (obj_list) |
489 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 490 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 491 | |
6b73597e RD |
492 | wake_up_interruptible(&file->async_file->poll_wait); |
493 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
494 | } |
495 | ||
496 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
497 | { | |
7162a3e0 RD |
498 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
499 | struct ib_ucq_object, uobject); | |
63aaf647 | 500 | |
7162a3e0 | 501 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
502 | event->event, &uobj->async_list, |
503 | &uobj->async_events_reported); | |
bc38a6ab RD |
504 | } |
505 | ||
506 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
507 | { | |
63aaf647 RD |
508 | struct ib_uevent_object *uobj; |
509 | ||
a040f95d JM |
510 | /* for XRC target qp's, check that qp is live */ |
511 | if (!event->element.qp->uobject || !event->element.qp->uobject->live) | |
512 | return; | |
513 | ||
63aaf647 RD |
514 | uobj = container_of(event->element.qp->uobject, |
515 | struct ib_uevent_object, uobject); | |
516 | ||
517 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
518 | event->event, &uobj->event_list, | |
519 | &uobj->events_reported); | |
bc38a6ab RD |
520 | } |
521 | ||
f520ba5a RD |
522 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
523 | { | |
63aaf647 RD |
524 | struct ib_uevent_object *uobj; |
525 | ||
526 | uobj = container_of(event->element.srq->uobject, | |
527 | struct ib_uevent_object, uobject); | |
528 | ||
529 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
530 | event->event, &uobj->event_list, | |
531 | &uobj->events_reported); | |
f520ba5a RD |
532 | } |
533 | ||
6b73597e RD |
534 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
535 | struct ib_event *event) | |
bc38a6ab RD |
536 | { |
537 | struct ib_uverbs_file *file = | |
538 | container_of(handler, struct ib_uverbs_file, event_handler); | |
539 | ||
63aaf647 RD |
540 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
541 | NULL, NULL); | |
bc38a6ab RD |
542 | } |
543 | ||
6b73597e | 544 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
b1e4594b | 545 | int is_async) |
bc38a6ab | 546 | { |
6b73597e | 547 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab RD |
548 | struct file *filp; |
549 | ||
6b73597e RD |
550 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
551 | if (!ev_file) | |
552 | return ERR_PTR(-ENOMEM); | |
553 | ||
554 | kref_init(&ev_file->ref); | |
555 | spin_lock_init(&ev_file->lock); | |
556 | INIT_LIST_HEAD(&ev_file->event_list); | |
557 | init_waitqueue_head(&ev_file->poll_wait); | |
558 | ev_file->uverbs_file = uverbs_file; | |
559 | ev_file->async_queue = NULL; | |
560 | ev_file->is_async = is_async; | |
1ae5c187 | 561 | ev_file->is_closed = 0; |
6b73597e | 562 | |
b1e4594b | 563 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
a265e558 | 564 | ev_file, O_RDONLY); |
b1e4594b AV |
565 | if (IS_ERR(filp)) |
566 | kfree(ev_file); | |
a7dab9e8 | 567 | |
6b73597e | 568 | return filp; |
6b73597e RD |
569 | } |
570 | ||
571 | /* | |
572 | * Look up a completion event file by FD. If lookup is successful, | |
573 | * takes a ref to the event file struct that it returns; if | |
574 | * unsuccessful, returns NULL. | |
575 | */ | |
576 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
577 | { | |
578 | struct ib_uverbs_event_file *ev_file = NULL; | |
2903ff01 | 579 | struct fd f = fdget(fd); |
6b73597e | 580 | |
2903ff01 | 581 | if (!f.file) |
6b73597e RD |
582 | return NULL; |
583 | ||
2903ff01 | 584 | if (f.file->f_op != &uverbs_event_fops) |
6b73597e RD |
585 | goto out; |
586 | ||
2903ff01 | 587 | ev_file = f.file->private_data; |
6b73597e RD |
588 | if (ev_file->is_async) { |
589 | ev_file = NULL; | |
590 | goto out; | |
591 | } | |
592 | ||
593 | kref_get(&ev_file->ref); | |
594 | ||
595 | out: | |
2903ff01 | 596 | fdput(f); |
6b73597e | 597 | return ev_file; |
bc38a6ab RD |
598 | } |
599 | ||
600 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
601 | size_t count, loff_t *pos) | |
602 | { | |
603 | struct ib_uverbs_file *file = filp->private_data; | |
604 | struct ib_uverbs_cmd_hdr hdr; | |
f21519b2 | 605 | __u32 flags; |
bc38a6ab RD |
606 | |
607 | if (count < sizeof hdr) | |
608 | return -EINVAL; | |
609 | ||
610 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
611 | return -EFAULT; | |
612 | ||
f21519b2 YD |
613 | flags = (hdr.command & |
614 | IB_USER_VERBS_CMD_FLAGS_MASK) >> IB_USER_VERBS_CMD_FLAGS_SHIFT; | |
bc38a6ab | 615 | |
f21519b2 YD |
616 | if (!flags) { |
617 | __u32 command; | |
bc38a6ab | 618 | |
f21519b2 YD |
619 | if (hdr.command & ~(__u32)(IB_USER_VERBS_CMD_FLAGS_MASK | |
620 | IB_USER_VERBS_CMD_COMMAND_MASK)) | |
621 | return -EINVAL; | |
b1b8afb8 | 622 | |
f21519b2 | 623 | command = hdr.command & IB_USER_VERBS_CMD_COMMAND_MASK; |
400dbc96 | 624 | |
f21519b2 YD |
625 | if (command >= ARRAY_SIZE(uverbs_cmd_table) || |
626 | !uverbs_cmd_table[command]) | |
627 | return -EINVAL; | |
400dbc96 | 628 | |
f21519b2 YD |
629 | if (!file->ucontext && |
630 | command != IB_USER_VERBS_CMD_GET_CONTEXT) | |
400dbc96 II |
631 | return -EINVAL; |
632 | ||
f21519b2 YD |
633 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << command))) |
634 | return -ENOSYS; | |
635 | ||
400dbc96 II |
636 | if (hdr.in_words * 4 != count) |
637 | return -EINVAL; | |
638 | ||
f21519b2 YD |
639 | return uverbs_cmd_table[command](file, |
640 | buf + sizeof(hdr), | |
641 | hdr.in_words * 4, | |
642 | hdr.out_words * 4); | |
643 | ||
f21519b2 YD |
644 | } else if (flags == IB_USER_VERBS_CMD_FLAG_EXTENDED) { |
645 | __u32 command; | |
646 | ||
647 | struct ib_uverbs_ex_cmd_hdr ex_hdr; | |
648 | struct ib_udata ucore; | |
649 | struct ib_udata uhw; | |
650 | int err; | |
651 | size_t written_count = count; | |
652 | ||
653 | if (hdr.command & ~(__u32)(IB_USER_VERBS_CMD_FLAGS_MASK | | |
654 | IB_USER_VERBS_CMD_COMMAND_MASK)) | |
655 | return -EINVAL; | |
656 | ||
657 | command = hdr.command & IB_USER_VERBS_CMD_COMMAND_MASK; | |
658 | ||
659 | if (command >= ARRAY_SIZE(uverbs_ex_cmd_table) || | |
660 | !uverbs_ex_cmd_table[command]) | |
661 | return -ENOSYS; | |
662 | ||
663 | if (!file->ucontext) | |
664 | return -EINVAL; | |
665 | ||
666 | if (!(file->device->ib_dev->uverbs_ex_cmd_mask & (1ull << command))) | |
667 | return -ENOSYS; | |
668 | ||
669 | if (count < (sizeof(hdr) + sizeof(ex_hdr))) | |
670 | return -EINVAL; | |
671 | ||
672 | if (copy_from_user(&ex_hdr, buf + sizeof(hdr), sizeof(ex_hdr))) | |
673 | return -EFAULT; | |
674 | ||
675 | count -= sizeof(hdr) + sizeof(ex_hdr); | |
676 | buf += sizeof(hdr) + sizeof(ex_hdr); | |
677 | ||
678 | if ((hdr.in_words + ex_hdr.provider_in_words) * 8 != count) | |
679 | return -EINVAL; | |
680 | ||
7efb1b19 YD |
681 | if (ex_hdr.cmd_hdr_reserved) |
682 | return -EINVAL; | |
683 | ||
f21519b2 YD |
684 | if (ex_hdr.response) { |
685 | if (!hdr.out_words && !ex_hdr.provider_out_words) | |
686 | return -EINVAL; | |
6cc3df84 YD |
687 | |
688 | if (!access_ok(VERIFY_WRITE, | |
689 | (void __user *) (unsigned long) ex_hdr.response, | |
690 | (hdr.out_words + ex_hdr.provider_out_words) * 8)) | |
691 | return -EFAULT; | |
f21519b2 YD |
692 | } else { |
693 | if (hdr.out_words || ex_hdr.provider_out_words) | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
a96e4e2f RD |
697 | INIT_UDATA_BUF_OR_NULL(&ucore, buf, (unsigned long) ex_hdr.response, |
698 | hdr.in_words * 8, hdr.out_words * 8); | |
699 | ||
700 | INIT_UDATA_BUF_OR_NULL(&uhw, | |
701 | buf + ucore.inlen, | |
702 | (unsigned long) ex_hdr.response + ucore.outlen, | |
703 | ex_hdr.provider_in_words * 8, | |
704 | ex_hdr.provider_out_words * 8); | |
f21519b2 YD |
705 | |
706 | err = uverbs_ex_cmd_table[command](file, | |
707 | &ucore, | |
708 | &uhw); | |
709 | ||
710 | if (err) | |
711 | return err; | |
712 | ||
713 | return written_count; | |
400dbc96 | 714 | } |
f21519b2 YD |
715 | |
716 | return -ENOSYS; | |
bc38a6ab RD |
717 | } |
718 | ||
719 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
720 | { | |
721 | struct ib_uverbs_file *file = filp->private_data; | |
722 | ||
723 | if (!file->ucontext) | |
724 | return -ENODEV; | |
725 | else | |
726 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
727 | } | |
728 | ||
5b2d281a RD |
729 | /* |
730 | * ib_uverbs_open() does not need the BKL: | |
731 | * | |
2a72f212 | 732 | * - the ib_uverbs_device structures are properly reference counted and |
5b2d281a RD |
733 | * everything else is purely local to the file being created, so |
734 | * races against other open calls are not a problem; | |
735 | * - there is no ioctl method to race against; | |
2a72f212 AC |
736 | * - the open method will either immediately run -ENXIO, or all |
737 | * required initialization will be done. | |
5b2d281a | 738 | */ |
bc38a6ab RD |
739 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
740 | { | |
70a30e16 | 741 | struct ib_uverbs_device *dev; |
bc38a6ab | 742 | struct ib_uverbs_file *file; |
70a30e16 | 743 | int ret; |
bc38a6ab | 744 | |
2a72f212 | 745 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
70a30e16 RD |
746 | if (dev) |
747 | kref_get(&dev->ref); | |
2a72f212 | 748 | else |
70a30e16 RD |
749 | return -ENXIO; |
750 | ||
751 | if (!try_module_get(dev->ib_dev->owner)) { | |
752 | ret = -ENODEV; | |
753 | goto err; | |
754 | } | |
bc38a6ab | 755 | |
6b73597e | 756 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 757 | if (!file) { |
70a30e16 RD |
758 | ret = -ENOMEM; |
759 | goto err_module; | |
63c47c28 | 760 | } |
bc38a6ab | 761 | |
70a30e16 RD |
762 | file->device = dev; |
763 | file->ucontext = NULL; | |
764 | file->async_file = NULL; | |
bc38a6ab | 765 | kref_init(&file->ref); |
95ed644f | 766 | mutex_init(&file->mutex); |
bc38a6ab | 767 | |
bc38a6ab RD |
768 | filp->private_data = file; |
769 | ||
bc1db9af | 770 | return nonseekable_open(inode, filp); |
70a30e16 RD |
771 | |
772 | err_module: | |
773 | module_put(dev->ib_dev->owner); | |
774 | ||
775 | err: | |
776 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 777 | return ret; |
bc38a6ab RD |
778 | } |
779 | ||
780 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
781 | { | |
782 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 783 | |
70a30e16 RD |
784 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
785 | ||
786 | if (file->async_file) | |
787 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 788 | |
bc38a6ab RD |
789 | kref_put(&file->ref, ib_uverbs_release_file); |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
2b8693c0 | 794 | static const struct file_operations uverbs_fops = { |
9afed76d AC |
795 | .owner = THIS_MODULE, |
796 | .write = ib_uverbs_write, | |
797 | .open = ib_uverbs_open, | |
bc1db9af RD |
798 | .release = ib_uverbs_close, |
799 | .llseek = no_llseek, | |
bc38a6ab RD |
800 | }; |
801 | ||
2b8693c0 | 802 | static const struct file_operations uverbs_mmap_fops = { |
9afed76d AC |
803 | .owner = THIS_MODULE, |
804 | .write = ib_uverbs_write, | |
bc38a6ab | 805 | .mmap = ib_uverbs_mmap, |
9afed76d | 806 | .open = ib_uverbs_open, |
bc1db9af RD |
807 | .release = ib_uverbs_close, |
808 | .llseek = no_llseek, | |
bc38a6ab RD |
809 | }; |
810 | ||
811 | static struct ib_client uverbs_client = { | |
812 | .name = "uverbs", | |
813 | .add = ib_uverbs_add_one, | |
814 | .remove = ib_uverbs_remove_one | |
815 | }; | |
816 | ||
f4e91eb4 TJ |
817 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
818 | char *buf) | |
bc38a6ab | 819 | { |
f4e91eb4 | 820 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
821 | |
822 | if (!dev) | |
823 | return -ENODEV; | |
bc38a6ab RD |
824 | |
825 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
826 | } | |
f4e91eb4 | 827 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 828 | |
f4e91eb4 TJ |
829 | static ssize_t show_dev_abi_version(struct device *device, |
830 | struct device_attribute *attr, char *buf) | |
274c0891 | 831 | { |
f4e91eb4 | 832 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
833 | |
834 | if (!dev) | |
835 | return -ENODEV; | |
274c0891 RD |
836 | |
837 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
838 | } | |
f4e91eb4 | 839 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 840 | |
0933e2d9 AK |
841 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
842 | __stringify(IB_USER_VERBS_ABI_VERSION)); | |
bc38a6ab | 843 | |
6d6a0e71 AC |
844 | static dev_t overflow_maj; |
845 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); | |
846 | ||
847 | /* | |
848 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by | |
849 | * requesting a new major number and doubling the number of max devices we | |
850 | * support. It's stupid, but simple. | |
851 | */ | |
852 | static int find_overflow_devnum(void) | |
853 | { | |
854 | int ret; | |
855 | ||
856 | if (!overflow_maj) { | |
857 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, | |
858 | "infiniband_verbs"); | |
859 | if (ret) { | |
860 | printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n"); | |
861 | return ret; | |
862 | } | |
863 | } | |
864 | ||
865 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); | |
866 | if (ret >= IB_UVERBS_MAX_DEVICES) | |
867 | return -1; | |
868 | ||
869 | return ret; | |
870 | } | |
871 | ||
bc38a6ab RD |
872 | static void ib_uverbs_add_one(struct ib_device *device) |
873 | { | |
38707980 | 874 | int devnum; |
ddbd6883 | 875 | dev_t base; |
bc38a6ab RD |
876 | struct ib_uverbs_device *uverbs_dev; |
877 | ||
878 | if (!device->alloc_ucontext) | |
879 | return; | |
880 | ||
de6eb66b | 881 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
882 | if (!uverbs_dev) |
883 | return; | |
884 | ||
70a30e16 | 885 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 886 | init_completion(&uverbs_dev->comp); |
53d0bd1e SH |
887 | uverbs_dev->xrcd_tree = RB_ROOT; |
888 | mutex_init(&uverbs_dev->xrcd_tree_mutex); | |
70a30e16 | 889 | |
bc38a6ab | 890 | spin_lock(&map_lock); |
38707980 AC |
891 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
892 | if (devnum >= IB_UVERBS_MAX_DEVICES) { | |
bc38a6ab | 893 | spin_unlock(&map_lock); |
6d6a0e71 AC |
894 | devnum = find_overflow_devnum(); |
895 | if (devnum < 0) | |
896 | goto err; | |
897 | ||
898 | spin_lock(&map_lock); | |
899 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; | |
900 | base = devnum + overflow_maj; | |
901 | set_bit(devnum, overflow_map); | |
902 | } else { | |
903 | uverbs_dev->devnum = devnum; | |
904 | base = devnum + IB_UVERBS_BASE_DEV; | |
905 | set_bit(devnum, dev_map); | |
bc38a6ab | 906 | } |
bc38a6ab RD |
907 | spin_unlock(&map_lock); |
908 | ||
6b73597e | 909 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 910 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 911 | |
055422dd AC |
912 | cdev_init(&uverbs_dev->cdev, NULL); |
913 | uverbs_dev->cdev.owner = THIS_MODULE; | |
914 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
915 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); | |
ddbd6883 | 916 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
70a30e16 | 917 | goto err_cdev; |
bc38a6ab | 918 | |
91bd418f | 919 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
055422dd | 920 | uverbs_dev->cdev.dev, uverbs_dev, |
91bd418f | 921 | "uverbs%d", uverbs_dev->devnum); |
f4e91eb4 | 922 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
923 | goto err_cdev; |
924 | ||
f4e91eb4 | 925 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 926 | goto err_class; |
f4e91eb4 | 927 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 928 | goto err_class; |
bc38a6ab RD |
929 | |
930 | ib_set_client_data(device, &uverbs_client, uverbs_dev); | |
931 | ||
932 | return; | |
933 | ||
934 | err_class: | |
055422dd | 935 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
bc38a6ab RD |
936 | |
937 | err_cdev: | |
055422dd | 938 | cdev_del(&uverbs_dev->cdev); |
6d6a0e71 AC |
939 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
940 | clear_bit(devnum, dev_map); | |
941 | else | |
942 | clear_bit(devnum, overflow_map); | |
bc38a6ab RD |
943 | |
944 | err: | |
70a30e16 | 945 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
946 | wait_for_completion(&uverbs_dev->comp); |
947 | kfree(uverbs_dev); | |
bc38a6ab RD |
948 | return; |
949 | } | |
950 | ||
951 | static void ib_uverbs_remove_one(struct ib_device *device) | |
952 | { | |
953 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
954 | ||
955 | if (!uverbs_dev) | |
956 | return; | |
957 | ||
f4e91eb4 | 958 | dev_set_drvdata(uverbs_dev->dev, NULL); |
055422dd AC |
959 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
960 | cdev_del(&uverbs_dev->cdev); | |
70a30e16 | 961 | |
6d6a0e71 AC |
962 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
963 | clear_bit(uverbs_dev->devnum, dev_map); | |
964 | else | |
965 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); | |
fd60ae40 | 966 | |
70a30e16 | 967 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
968 | wait_for_completion(&uverbs_dev->comp); |
969 | kfree(uverbs_dev); | |
bc38a6ab RD |
970 | } |
971 | ||
2c9ede55 | 972 | static char *uverbs_devnode(struct device *dev, umode_t *mode) |
71c29bd5 | 973 | { |
b2bc4782 GR |
974 | if (mode) |
975 | *mode = 0666; | |
71c29bd5 RD |
976 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
977 | } | |
978 | ||
bc38a6ab RD |
979 | static int __init ib_uverbs_init(void) |
980 | { | |
981 | int ret; | |
982 | ||
bc38a6ab RD |
983 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
984 | "infiniband_verbs"); | |
985 | if (ret) { | |
986 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
987 | goto out; | |
988 | } | |
989 | ||
70a30e16 RD |
990 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
991 | if (IS_ERR(uverbs_class)) { | |
992 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
993 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
994 | goto out_chrdev; | |
995 | } | |
996 | ||
71c29bd5 RD |
997 | uverbs_class->devnode = uverbs_devnode; |
998 | ||
0933e2d9 | 999 | ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); |
bc38a6ab RD |
1000 | if (ret) { |
1001 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
1002 | goto out_class; | |
1003 | } | |
1004 | ||
bc38a6ab RD |
1005 | ret = ib_register_client(&uverbs_client); |
1006 | if (ret) { | |
1007 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
a265e558 | 1008 | goto out_class; |
bc38a6ab RD |
1009 | } |
1010 | ||
1011 | return 0; | |
1012 | ||
bc38a6ab | 1013 | out_class: |
70a30e16 | 1014 | class_destroy(uverbs_class); |
bc38a6ab RD |
1015 | |
1016 | out_chrdev: | |
1017 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
1018 | ||
1019 | out: | |
1020 | return ret; | |
1021 | } | |
1022 | ||
1023 | static void __exit ib_uverbs_cleanup(void) | |
1024 | { | |
1025 | ib_unregister_client(&uverbs_client); | |
70a30e16 | 1026 | class_destroy(uverbs_class); |
bc38a6ab | 1027 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
6d6a0e71 AC |
1028 | if (overflow_maj) |
1029 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); | |
5d7edb3c RD |
1030 | idr_destroy(&ib_uverbs_pd_idr); |
1031 | idr_destroy(&ib_uverbs_mr_idr); | |
1032 | idr_destroy(&ib_uverbs_mw_idr); | |
1033 | idr_destroy(&ib_uverbs_ah_idr); | |
1034 | idr_destroy(&ib_uverbs_cq_idr); | |
1035 | idr_destroy(&ib_uverbs_qp_idr); | |
1036 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
1037 | } |
1038 | ||
1039 | module_init(ib_uverbs_init); | |
1040 | module_exit(ib_uverbs_cleanup); |