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