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