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