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bc38a6ab RD |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
33b9b3ee | 3 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. |
2a1d9b7f RD |
4 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. |
5 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. | |
67cdb40c | 6 | * Copyright (c) 2005 PathScale, Inc. All rights reserved. |
bc38a6ab RD |
7 | * |
8 | * This software is available to you under a choice of one of two | |
9 | * licenses. You may choose to be licensed under the terms of the GNU | |
10 | * General Public License (GPL) Version 2, available from the file | |
11 | * COPYING in the main directory of this source tree, or the | |
12 | * OpenIB.org BSD license below: | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or | |
15 | * without modification, are permitted provided that the following | |
16 | * conditions are met: | |
17 | * | |
18 | * - Redistributions of source code must retain the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer. | |
21 | * | |
22 | * - Redistributions in binary form must reproduce the above | |
23 | * copyright notice, this list of conditions and the following | |
24 | * disclaimer in the documentation and/or other materials | |
25 | * provided with the distribution. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
28 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
29 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
30 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
31 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
32 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
33 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
34 | * SOFTWARE. | |
bc38a6ab RD |
35 | */ |
36 | ||
37 | #include <linux/module.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/device.h> | |
40 | #include <linux/err.h> | |
41 | #include <linux/fs.h> | |
42 | #include <linux/poll.h> | |
a99bbaf5 | 43 | #include <linux/sched.h> |
bc38a6ab | 44 | #include <linux/file.h> |
70a30e16 | 45 | #include <linux/cdev.h> |
a265e558 | 46 | #include <linux/anon_inodes.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
bc38a6ab RD |
48 | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | #include "uverbs.h" | |
52 | ||
53 | MODULE_AUTHOR("Roland Dreier"); | |
54 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
55 | MODULE_LICENSE("Dual BSD/GPL"); | |
56 | ||
bc38a6ab RD |
57 | enum { |
58 | IB_UVERBS_MAJOR = 231, | |
59 | IB_UVERBS_BASE_MINOR = 192, | |
60 | IB_UVERBS_MAX_DEVICES = 32 | |
61 | }; | |
62 | ||
63 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) | |
64 | ||
70a30e16 RD |
65 | static struct class *uverbs_class; |
66 | ||
9ead190b | 67 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
68 | DEFINE_IDR(ib_uverbs_pd_idr); |
69 | DEFINE_IDR(ib_uverbs_mr_idr); | |
70 | DEFINE_IDR(ib_uverbs_mw_idr); | |
71 | DEFINE_IDR(ib_uverbs_ah_idr); | |
72 | DEFINE_IDR(ib_uverbs_cq_idr); | |
73 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 74 | DEFINE_IDR(ib_uverbs_srq_idr); |
53d0bd1e | 75 | DEFINE_IDR(ib_uverbs_xrcd_idr); |
436f2ad0 | 76 | DEFINE_IDR(ib_uverbs_rule_idr); |
bc38a6ab | 77 | |
6276e08a | 78 | static DEFINE_SPINLOCK(map_lock); |
bc38a6ab RD |
79 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
80 | ||
81 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
82 | const char __user *buf, int in_len, | |
83 | int out_len) = { | |
9afed76d AC |
84 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
85 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
86 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
87 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
88 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
89 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
7e6edb9b | 90 | [IB_USER_VERBS_CMD_REREG_MR] = ib_uverbs_rereg_mr, |
9afed76d | 91 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, |
6b52a12b SM |
92 | [IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw, |
93 | [IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw, | |
6b73597e | 94 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
9afed76d AC |
95 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
96 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, | |
97 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, | |
98 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
99 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, | |
100 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
101 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, | |
102 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, | |
103 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
104 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, | |
105 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
106 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
107 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
108 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
109 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, | |
110 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
111 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
112 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
113 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, | |
114 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, | |
53d0bd1e SH |
115 | [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrcd, |
116 | [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrcd, | |
42849b26 | 117 | [IB_USER_VERBS_CMD_CREATE_XSRQ] = ib_uverbs_create_xsrq, |
436f2ad0 | 118 | [IB_USER_VERBS_CMD_OPEN_QP] = ib_uverbs_open_qp, |
f21519b2 YD |
119 | }; |
120 | ||
f21519b2 YD |
121 | static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file, |
122 | struct ib_udata *ucore, | |
123 | struct ib_udata *uhw) = { | |
124 | [IB_USER_VERBS_EX_CMD_CREATE_FLOW] = ib_uverbs_ex_create_flow, | |
5a77abf9 | 125 | [IB_USER_VERBS_EX_CMD_DESTROY_FLOW] = ib_uverbs_ex_destroy_flow, |
02d1aa7a | 126 | [IB_USER_VERBS_EX_CMD_QUERY_DEVICE] = ib_uverbs_ex_query_device, |
565197dd | 127 | [IB_USER_VERBS_EX_CMD_CREATE_CQ] = ib_uverbs_ex_create_cq, |
bc38a6ab RD |
128 | }; |
129 | ||
bc38a6ab | 130 | static void ib_uverbs_add_one(struct ib_device *device); |
7c1eb45a | 131 | static void ib_uverbs_remove_one(struct ib_device *device, void *client_data); |
bc38a6ab | 132 | |
70a30e16 RD |
133 | static void ib_uverbs_release_dev(struct kref *ref) |
134 | { | |
135 | struct ib_uverbs_device *dev = | |
136 | container_of(ref, struct ib_uverbs_device, ref); | |
137 | ||
fd60ae40 | 138 | complete(&dev->comp); |
70a30e16 RD |
139 | } |
140 | ||
04d29b0e RD |
141 | static void ib_uverbs_release_event_file(struct kref *ref) |
142 | { | |
143 | struct ib_uverbs_event_file *file = | |
144 | container_of(ref, struct ib_uverbs_event_file, ref); | |
145 | ||
146 | kfree(file); | |
147 | } | |
148 | ||
70a30e16 RD |
149 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
150 | struct ib_uverbs_event_file *ev_file, | |
151 | struct ib_ucq_object *uobj) | |
152 | { | |
153 | struct ib_uverbs_event *evt, *tmp; | |
154 | ||
155 | if (ev_file) { | |
156 | spin_lock_irq(&ev_file->lock); | |
157 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
158 | list_del(&evt->list); | |
159 | kfree(evt); | |
160 | } | |
161 | spin_unlock_irq(&ev_file->lock); | |
162 | ||
163 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
164 | } | |
165 | ||
166 | spin_lock_irq(&file->async_file->lock); | |
167 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
168 | list_del(&evt->list); | |
169 | kfree(evt); | |
170 | } | |
171 | spin_unlock_irq(&file->async_file->lock); | |
172 | } | |
173 | ||
174 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
175 | struct ib_uevent_object *uobj) | |
176 | { | |
177 | struct ib_uverbs_event *evt, *tmp; | |
178 | ||
179 | spin_lock_irq(&file->async_file->lock); | |
180 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
181 | list_del(&evt->list); | |
182 | kfree(evt); | |
183 | } | |
184 | spin_unlock_irq(&file->async_file->lock); | |
185 | } | |
186 | ||
f4e40156 JM |
187 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
188 | struct ib_uqp_object *uobj) | |
189 | { | |
190 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
191 | ||
192 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
193 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
194 | list_del(&mcast->list); | |
195 | kfree(mcast); | |
196 | } | |
197 | } | |
198 | ||
70a30e16 RD |
199 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
200 | struct ib_ucontext *context) | |
bc38a6ab RD |
201 | { |
202 | struct ib_uobject *uobj, *tmp; | |
203 | ||
204 | if (!context) | |
205 | return 0; | |
206 | ||
f7c6a7b5 RD |
207 | context->closing = 1; |
208 | ||
67cdb40c | 209 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
210 | struct ib_ah *ah = uobj->object; |
211 | ||
212 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 213 | ib_destroy_ah(ah); |
67cdb40c RD |
214 | kfree(uobj); |
215 | } | |
bc38a6ab | 216 | |
6b52a12b SM |
217 | /* Remove MWs before QPs, in order to support type 2A MWs. */ |
218 | list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) { | |
219 | struct ib_mw *mw = uobj->object; | |
220 | ||
221 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); | |
222 | ib_dealloc_mw(mw); | |
223 | kfree(uobj); | |
224 | } | |
225 | ||
436f2ad0 HHZ |
226 | list_for_each_entry_safe(uobj, tmp, &context->rule_list, list) { |
227 | struct ib_flow *flow_id = uobj->object; | |
228 | ||
229 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); | |
230 | ib_destroy_flow(flow_id); | |
231 | kfree(uobj); | |
232 | } | |
233 | ||
bc38a6ab | 234 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
9ead190b | 235 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
236 | struct ib_uqp_object *uqp = |
237 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
238 | |
239 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
0e0ec7e0 SH |
240 | if (qp != qp->real_qp) { |
241 | ib_close_qp(qp); | |
b93f3c18 SH |
242 | } else { |
243 | ib_uverbs_detach_umcast(qp, uqp); | |
244 | ib_destroy_qp(qp); | |
245 | } | |
f4e40156 JM |
246 | ib_uverbs_release_uevent(file, &uqp->uevent); |
247 | kfree(uqp); | |
bc38a6ab RD |
248 | } |
249 | ||
a233c4b5 SD |
250 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
251 | struct ib_srq *srq = uobj->object; | |
252 | struct ib_uevent_object *uevent = | |
253 | container_of(uobj, struct ib_uevent_object, uobject); | |
254 | ||
255 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
256 | ib_destroy_srq(srq); | |
257 | ib_uverbs_release_uevent(file, uevent); | |
258 | kfree(uevent); | |
259 | } | |
260 | ||
bc38a6ab | 261 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { |
9ead190b | 262 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
263 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
264 | struct ib_ucq_object *ucq = | |
265 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
266 | |
267 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 268 | ib_destroy_cq(cq); |
70a30e16 RD |
269 | ib_uverbs_release_ucq(file, ev_file, ucq); |
270 | kfree(ucq); | |
bc38a6ab RD |
271 | } |
272 | ||
bc38a6ab | 273 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
9ead190b | 274 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 275 | |
9ead190b | 276 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 277 | ib_dereg_mr(mr); |
f7c6a7b5 | 278 | kfree(uobj); |
bc38a6ab RD |
279 | } |
280 | ||
53d0bd1e SH |
281 | mutex_lock(&file->device->xrcd_tree_mutex); |
282 | list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) { | |
283 | struct ib_xrcd *xrcd = uobj->object; | |
284 | struct ib_uxrcd_object *uxrcd = | |
285 | container_of(uobj, struct ib_uxrcd_object, uobject); | |
286 | ||
287 | idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); | |
288 | ib_uverbs_dealloc_xrcd(file->device, xrcd); | |
289 | kfree(uxrcd); | |
290 | } | |
291 | mutex_unlock(&file->device->xrcd_tree_mutex); | |
292 | ||
bc38a6ab | 293 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
9ead190b RD |
294 | struct ib_pd *pd = uobj->object; |
295 | ||
296 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 297 | ib_dealloc_pd(pd); |
bc38a6ab RD |
298 | kfree(uobj); |
299 | } | |
300 | ||
8ada2c1c SR |
301 | put_pid(context->tgid); |
302 | ||
bc38a6ab RD |
303 | return context->device->dealloc_ucontext(context); |
304 | } | |
305 | ||
306 | static void ib_uverbs_release_file(struct kref *ref) | |
307 | { | |
308 | struct ib_uverbs_file *file = | |
309 | container_of(ref, struct ib_uverbs_file, ref); | |
310 | ||
311 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
312 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
313 | ||
bc38a6ab RD |
314 | kfree(file); |
315 | } | |
316 | ||
317 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
318 | size_t count, loff_t *pos) | |
319 | { | |
320 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 321 | struct ib_uverbs_event *event; |
bc38a6ab RD |
322 | int eventsz; |
323 | int ret = 0; | |
324 | ||
325 | spin_lock_irq(&file->lock); | |
326 | ||
6b73597e | 327 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
328 | spin_unlock_irq(&file->lock); |
329 | ||
330 | if (filp->f_flags & O_NONBLOCK) | |
331 | return -EAGAIN; | |
332 | ||
333 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 334 | !list_empty(&file->event_list))) |
bc38a6ab RD |
335 | return -ERESTARTSYS; |
336 | ||
337 | spin_lock_irq(&file->lock); | |
338 | } | |
339 | ||
63aaf647 RD |
340 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
341 | ||
342 | if (file->is_async) | |
bc38a6ab | 343 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 344 | else |
bc38a6ab | 345 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
346 | |
347 | if (eventsz > count) { | |
348 | ret = -EINVAL; | |
349 | event = NULL; | |
63aaf647 | 350 | } else { |
bc38a6ab | 351 | list_del(file->event_list.next); |
63aaf647 RD |
352 | if (event->counter) { |
353 | ++(*event->counter); | |
354 | list_del(&event->obj_list); | |
355 | } | |
356 | } | |
bc38a6ab RD |
357 | |
358 | spin_unlock_irq(&file->lock); | |
359 | ||
360 | if (event) { | |
361 | if (copy_to_user(buf, event, eventsz)) | |
362 | ret = -EFAULT; | |
363 | else | |
364 | ret = eventsz; | |
365 | } | |
366 | ||
367 | kfree(event); | |
368 | ||
369 | return ret; | |
370 | } | |
371 | ||
372 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
373 | struct poll_table_struct *wait) | |
374 | { | |
375 | unsigned int pollflags = 0; | |
376 | struct ib_uverbs_event_file *file = filp->private_data; | |
377 | ||
378 | poll_wait(filp, &file->poll_wait, wait); | |
379 | ||
380 | spin_lock_irq(&file->lock); | |
6b73597e | 381 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
382 | pollflags = POLLIN | POLLRDNORM; |
383 | spin_unlock_irq(&file->lock); | |
384 | ||
385 | return pollflags; | |
386 | } | |
387 | ||
abdf119b GN |
388 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
389 | { | |
390 | struct ib_uverbs_event_file *file = filp->private_data; | |
391 | ||
392 | return fasync_helper(fd, filp, on, &file->async_queue); | |
393 | } | |
394 | ||
bc38a6ab RD |
395 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
396 | { | |
397 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
398 | struct ib_uverbs_event *entry, *tmp; |
399 | ||
400 | spin_lock_irq(&file->lock); | |
1ae5c187 | 401 | file->is_closed = 1; |
6b73597e RD |
402 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
403 | if (entry->counter) | |
404 | list_del(&entry->obj_list); | |
405 | kfree(entry); | |
406 | } | |
407 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 408 | |
03c40442 | 409 | if (file->is_async) |
6b73597e | 410 | ib_unregister_event_handler(&file->uverbs_file->event_handler); |
03c40442 | 411 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); |
6b73597e | 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 | ||
03c40442 YH |
543 | void ib_uverbs_free_async_event_file(struct ib_uverbs_file *file) |
544 | { | |
545 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
546 | file->async_file = NULL; | |
547 | } | |
548 | ||
6b73597e | 549 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
b1e4594b | 550 | int is_async) |
bc38a6ab | 551 | { |
6b73597e | 552 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab | 553 | struct file *filp; |
03c40442 | 554 | int ret; |
bc38a6ab | 555 | |
03c40442 | 556 | ev_file = kzalloc(sizeof(*ev_file), GFP_KERNEL); |
6b73597e RD |
557 | if (!ev_file) |
558 | return ERR_PTR(-ENOMEM); | |
559 | ||
560 | kref_init(&ev_file->ref); | |
561 | spin_lock_init(&ev_file->lock); | |
562 | INIT_LIST_HEAD(&ev_file->event_list); | |
563 | init_waitqueue_head(&ev_file->poll_wait); | |
564 | ev_file->uverbs_file = uverbs_file; | |
03c40442 | 565 | kref_get(&ev_file->uverbs_file->ref); |
6b73597e | 566 | ev_file->async_queue = NULL; |
1ae5c187 | 567 | ev_file->is_closed = 0; |
6b73597e | 568 | |
b1e4594b | 569 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
a265e558 | 570 | ev_file, O_RDONLY); |
b1e4594b | 571 | if (IS_ERR(filp)) |
03c40442 YH |
572 | goto err_put_refs; |
573 | ||
574 | if (is_async) { | |
575 | WARN_ON(uverbs_file->async_file); | |
576 | uverbs_file->async_file = ev_file; | |
577 | kref_get(&uverbs_file->async_file->ref); | |
578 | INIT_IB_EVENT_HANDLER(&uverbs_file->event_handler, | |
579 | uverbs_file->device->ib_dev, | |
580 | ib_uverbs_event_handler); | |
581 | ret = ib_register_event_handler(&uverbs_file->event_handler); | |
582 | if (ret) | |
583 | goto err_put_file; | |
584 | ||
585 | /* At that point async file stuff was fully set */ | |
586 | ev_file->is_async = 1; | |
587 | } | |
588 | ||
589 | return filp; | |
590 | ||
591 | err_put_file: | |
592 | fput(filp); | |
593 | kref_put(&uverbs_file->async_file->ref, ib_uverbs_release_event_file); | |
594 | uverbs_file->async_file = NULL; | |
595 | return ERR_PTR(ret); | |
a7dab9e8 | 596 | |
03c40442 YH |
597 | err_put_refs: |
598 | kref_put(&ev_file->uverbs_file->ref, ib_uverbs_release_file); | |
599 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
6b73597e | 600 | return filp; |
6b73597e RD |
601 | } |
602 | ||
603 | /* | |
604 | * Look up a completion event file by FD. If lookup is successful, | |
605 | * takes a ref to the event file struct that it returns; if | |
606 | * unsuccessful, returns NULL. | |
607 | */ | |
608 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
609 | { | |
610 | struct ib_uverbs_event_file *ev_file = NULL; | |
2903ff01 | 611 | struct fd f = fdget(fd); |
6b73597e | 612 | |
2903ff01 | 613 | if (!f.file) |
6b73597e RD |
614 | return NULL; |
615 | ||
2903ff01 | 616 | if (f.file->f_op != &uverbs_event_fops) |
6b73597e RD |
617 | goto out; |
618 | ||
2903ff01 | 619 | ev_file = f.file->private_data; |
6b73597e RD |
620 | if (ev_file->is_async) { |
621 | ev_file = NULL; | |
622 | goto out; | |
623 | } | |
624 | ||
625 | kref_get(&ev_file->ref); | |
626 | ||
627 | out: | |
2903ff01 | 628 | fdput(f); |
6b73597e | 629 | return ev_file; |
bc38a6ab RD |
630 | } |
631 | ||
632 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
633 | size_t count, loff_t *pos) | |
634 | { | |
635 | struct ib_uverbs_file *file = filp->private_data; | |
636 | struct ib_uverbs_cmd_hdr hdr; | |
f21519b2 | 637 | __u32 flags; |
bc38a6ab RD |
638 | |
639 | if (count < sizeof hdr) | |
640 | return -EINVAL; | |
641 | ||
642 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
643 | return -EFAULT; | |
644 | ||
f21519b2 YD |
645 | flags = (hdr.command & |
646 | IB_USER_VERBS_CMD_FLAGS_MASK) >> IB_USER_VERBS_CMD_FLAGS_SHIFT; | |
bc38a6ab | 647 | |
f21519b2 YD |
648 | if (!flags) { |
649 | __u32 command; | |
bc38a6ab | 650 | |
f21519b2 YD |
651 | if (hdr.command & ~(__u32)(IB_USER_VERBS_CMD_FLAGS_MASK | |
652 | IB_USER_VERBS_CMD_COMMAND_MASK)) | |
653 | return -EINVAL; | |
b1b8afb8 | 654 | |
f21519b2 | 655 | command = hdr.command & IB_USER_VERBS_CMD_COMMAND_MASK; |
400dbc96 | 656 | |
f21519b2 YD |
657 | if (command >= ARRAY_SIZE(uverbs_cmd_table) || |
658 | !uverbs_cmd_table[command]) | |
659 | return -EINVAL; | |
400dbc96 | 660 | |
f21519b2 YD |
661 | if (!file->ucontext && |
662 | command != IB_USER_VERBS_CMD_GET_CONTEXT) | |
400dbc96 II |
663 | return -EINVAL; |
664 | ||
f21519b2 YD |
665 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << command))) |
666 | return -ENOSYS; | |
667 | ||
400dbc96 II |
668 | if (hdr.in_words * 4 != count) |
669 | return -EINVAL; | |
670 | ||
f21519b2 YD |
671 | return uverbs_cmd_table[command](file, |
672 | buf + sizeof(hdr), | |
673 | hdr.in_words * 4, | |
674 | hdr.out_words * 4); | |
675 | ||
f21519b2 YD |
676 | } else if (flags == IB_USER_VERBS_CMD_FLAG_EXTENDED) { |
677 | __u32 command; | |
678 | ||
679 | struct ib_uverbs_ex_cmd_hdr ex_hdr; | |
680 | struct ib_udata ucore; | |
681 | struct ib_udata uhw; | |
682 | int err; | |
683 | size_t written_count = count; | |
684 | ||
685 | if (hdr.command & ~(__u32)(IB_USER_VERBS_CMD_FLAGS_MASK | | |
686 | IB_USER_VERBS_CMD_COMMAND_MASK)) | |
687 | return -EINVAL; | |
688 | ||
689 | command = hdr.command & IB_USER_VERBS_CMD_COMMAND_MASK; | |
690 | ||
691 | if (command >= ARRAY_SIZE(uverbs_ex_cmd_table) || | |
692 | !uverbs_ex_cmd_table[command]) | |
693 | return -ENOSYS; | |
694 | ||
695 | if (!file->ucontext) | |
696 | return -EINVAL; | |
697 | ||
698 | if (!(file->device->ib_dev->uverbs_ex_cmd_mask & (1ull << command))) | |
699 | return -ENOSYS; | |
700 | ||
701 | if (count < (sizeof(hdr) + sizeof(ex_hdr))) | |
702 | return -EINVAL; | |
703 | ||
704 | if (copy_from_user(&ex_hdr, buf + sizeof(hdr), sizeof(ex_hdr))) | |
705 | return -EFAULT; | |
706 | ||
707 | count -= sizeof(hdr) + sizeof(ex_hdr); | |
708 | buf += sizeof(hdr) + sizeof(ex_hdr); | |
709 | ||
710 | if ((hdr.in_words + ex_hdr.provider_in_words) * 8 != count) | |
711 | return -EINVAL; | |
712 | ||
7efb1b19 YD |
713 | if (ex_hdr.cmd_hdr_reserved) |
714 | return -EINVAL; | |
715 | ||
f21519b2 YD |
716 | if (ex_hdr.response) { |
717 | if (!hdr.out_words && !ex_hdr.provider_out_words) | |
718 | return -EINVAL; | |
6cc3df84 YD |
719 | |
720 | if (!access_ok(VERIFY_WRITE, | |
721 | (void __user *) (unsigned long) ex_hdr.response, | |
722 | (hdr.out_words + ex_hdr.provider_out_words) * 8)) | |
723 | return -EFAULT; | |
f21519b2 YD |
724 | } else { |
725 | if (hdr.out_words || ex_hdr.provider_out_words) | |
726 | return -EINVAL; | |
727 | } | |
728 | ||
a96e4e2f RD |
729 | INIT_UDATA_BUF_OR_NULL(&ucore, buf, (unsigned long) ex_hdr.response, |
730 | hdr.in_words * 8, hdr.out_words * 8); | |
731 | ||
732 | INIT_UDATA_BUF_OR_NULL(&uhw, | |
733 | buf + ucore.inlen, | |
734 | (unsigned long) ex_hdr.response + ucore.outlen, | |
735 | ex_hdr.provider_in_words * 8, | |
736 | ex_hdr.provider_out_words * 8); | |
f21519b2 YD |
737 | |
738 | err = uverbs_ex_cmd_table[command](file, | |
739 | &ucore, | |
740 | &uhw); | |
741 | ||
742 | if (err) | |
743 | return err; | |
744 | ||
745 | return written_count; | |
400dbc96 | 746 | } |
f21519b2 YD |
747 | |
748 | return -ENOSYS; | |
bc38a6ab RD |
749 | } |
750 | ||
751 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
752 | { | |
753 | struct ib_uverbs_file *file = filp->private_data; | |
754 | ||
755 | if (!file->ucontext) | |
756 | return -ENODEV; | |
757 | else | |
758 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
759 | } | |
760 | ||
5b2d281a RD |
761 | /* |
762 | * ib_uverbs_open() does not need the BKL: | |
763 | * | |
2a72f212 | 764 | * - the ib_uverbs_device structures are properly reference counted and |
5b2d281a RD |
765 | * everything else is purely local to the file being created, so |
766 | * races against other open calls are not a problem; | |
767 | * - there is no ioctl method to race against; | |
2a72f212 AC |
768 | * - the open method will either immediately run -ENXIO, or all |
769 | * required initialization will be done. | |
5b2d281a | 770 | */ |
bc38a6ab RD |
771 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
772 | { | |
70a30e16 | 773 | struct ib_uverbs_device *dev; |
bc38a6ab | 774 | struct ib_uverbs_file *file; |
70a30e16 | 775 | int ret; |
bc38a6ab | 776 | |
2a72f212 | 777 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
70a30e16 RD |
778 | if (dev) |
779 | kref_get(&dev->ref); | |
2a72f212 | 780 | else |
70a30e16 RD |
781 | return -ENXIO; |
782 | ||
783 | if (!try_module_get(dev->ib_dev->owner)) { | |
784 | ret = -ENODEV; | |
785 | goto err; | |
786 | } | |
bc38a6ab | 787 | |
6b73597e | 788 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 789 | if (!file) { |
70a30e16 RD |
790 | ret = -ENOMEM; |
791 | goto err_module; | |
63c47c28 | 792 | } |
bc38a6ab | 793 | |
70a30e16 RD |
794 | file->device = dev; |
795 | file->ucontext = NULL; | |
796 | file->async_file = NULL; | |
bc38a6ab | 797 | kref_init(&file->ref); |
95ed644f | 798 | mutex_init(&file->mutex); |
bc38a6ab | 799 | |
bc38a6ab RD |
800 | filp->private_data = file; |
801 | ||
bc1db9af | 802 | return nonseekable_open(inode, filp); |
70a30e16 RD |
803 | |
804 | err_module: | |
805 | module_put(dev->ib_dev->owner); | |
806 | ||
807 | err: | |
808 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 809 | return ret; |
bc38a6ab RD |
810 | } |
811 | ||
812 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
813 | { | |
814 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 815 | |
70a30e16 RD |
816 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
817 | ||
818 | if (file->async_file) | |
819 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 820 | |
bc38a6ab RD |
821 | kref_put(&file->ref, ib_uverbs_release_file); |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
2b8693c0 | 826 | static const struct file_operations uverbs_fops = { |
9afed76d AC |
827 | .owner = THIS_MODULE, |
828 | .write = ib_uverbs_write, | |
829 | .open = ib_uverbs_open, | |
bc1db9af RD |
830 | .release = ib_uverbs_close, |
831 | .llseek = no_llseek, | |
bc38a6ab RD |
832 | }; |
833 | ||
2b8693c0 | 834 | static const struct file_operations uverbs_mmap_fops = { |
9afed76d AC |
835 | .owner = THIS_MODULE, |
836 | .write = ib_uverbs_write, | |
bc38a6ab | 837 | .mmap = ib_uverbs_mmap, |
9afed76d | 838 | .open = ib_uverbs_open, |
bc1db9af RD |
839 | .release = ib_uverbs_close, |
840 | .llseek = no_llseek, | |
bc38a6ab RD |
841 | }; |
842 | ||
843 | static struct ib_client uverbs_client = { | |
844 | .name = "uverbs", | |
845 | .add = ib_uverbs_add_one, | |
846 | .remove = ib_uverbs_remove_one | |
847 | }; | |
848 | ||
f4e91eb4 TJ |
849 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
850 | char *buf) | |
bc38a6ab | 851 | { |
f4e91eb4 | 852 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
853 | |
854 | if (!dev) | |
855 | return -ENODEV; | |
bc38a6ab RD |
856 | |
857 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
858 | } | |
f4e91eb4 | 859 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 860 | |
f4e91eb4 TJ |
861 | static ssize_t show_dev_abi_version(struct device *device, |
862 | struct device_attribute *attr, char *buf) | |
274c0891 | 863 | { |
f4e91eb4 | 864 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
865 | |
866 | if (!dev) | |
867 | return -ENODEV; | |
274c0891 RD |
868 | |
869 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
870 | } | |
f4e91eb4 | 871 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 872 | |
0933e2d9 AK |
873 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
874 | __stringify(IB_USER_VERBS_ABI_VERSION)); | |
bc38a6ab | 875 | |
6d6a0e71 AC |
876 | static dev_t overflow_maj; |
877 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); | |
878 | ||
879 | /* | |
880 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by | |
881 | * requesting a new major number and doubling the number of max devices we | |
882 | * support. It's stupid, but simple. | |
883 | */ | |
884 | static int find_overflow_devnum(void) | |
885 | { | |
886 | int ret; | |
887 | ||
888 | if (!overflow_maj) { | |
889 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, | |
890 | "infiniband_verbs"); | |
891 | if (ret) { | |
892 | printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n"); | |
893 | return ret; | |
894 | } | |
895 | } | |
896 | ||
897 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); | |
898 | if (ret >= IB_UVERBS_MAX_DEVICES) | |
899 | return -1; | |
900 | ||
901 | return ret; | |
902 | } | |
903 | ||
bc38a6ab RD |
904 | static void ib_uverbs_add_one(struct ib_device *device) |
905 | { | |
38707980 | 906 | int devnum; |
ddbd6883 | 907 | dev_t base; |
bc38a6ab RD |
908 | struct ib_uverbs_device *uverbs_dev; |
909 | ||
910 | if (!device->alloc_ucontext) | |
911 | return; | |
912 | ||
de6eb66b | 913 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
914 | if (!uverbs_dev) |
915 | return; | |
916 | ||
70a30e16 | 917 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 918 | init_completion(&uverbs_dev->comp); |
53d0bd1e SH |
919 | uverbs_dev->xrcd_tree = RB_ROOT; |
920 | mutex_init(&uverbs_dev->xrcd_tree_mutex); | |
70a30e16 | 921 | |
bc38a6ab | 922 | spin_lock(&map_lock); |
38707980 AC |
923 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
924 | if (devnum >= IB_UVERBS_MAX_DEVICES) { | |
bc38a6ab | 925 | spin_unlock(&map_lock); |
6d6a0e71 AC |
926 | devnum = find_overflow_devnum(); |
927 | if (devnum < 0) | |
928 | goto err; | |
929 | ||
930 | spin_lock(&map_lock); | |
931 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; | |
932 | base = devnum + overflow_maj; | |
933 | set_bit(devnum, overflow_map); | |
934 | } else { | |
935 | uverbs_dev->devnum = devnum; | |
936 | base = devnum + IB_UVERBS_BASE_DEV; | |
937 | set_bit(devnum, dev_map); | |
bc38a6ab | 938 | } |
bc38a6ab RD |
939 | spin_unlock(&map_lock); |
940 | ||
6b73597e | 941 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 942 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 943 | |
055422dd AC |
944 | cdev_init(&uverbs_dev->cdev, NULL); |
945 | uverbs_dev->cdev.owner = THIS_MODULE; | |
946 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
947 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); | |
ddbd6883 | 948 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
70a30e16 | 949 | goto err_cdev; |
bc38a6ab | 950 | |
91bd418f | 951 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
055422dd | 952 | uverbs_dev->cdev.dev, uverbs_dev, |
91bd418f | 953 | "uverbs%d", uverbs_dev->devnum); |
f4e91eb4 | 954 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
955 | goto err_cdev; |
956 | ||
f4e91eb4 | 957 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 958 | goto err_class; |
f4e91eb4 | 959 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 960 | goto err_class; |
bc38a6ab RD |
961 | |
962 | ib_set_client_data(device, &uverbs_client, uverbs_dev); | |
963 | ||
964 | return; | |
965 | ||
966 | err_class: | |
055422dd | 967 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
bc38a6ab RD |
968 | |
969 | err_cdev: | |
055422dd | 970 | cdev_del(&uverbs_dev->cdev); |
6d6a0e71 AC |
971 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
972 | clear_bit(devnum, dev_map); | |
973 | else | |
974 | clear_bit(devnum, overflow_map); | |
bc38a6ab RD |
975 | |
976 | err: | |
70a30e16 | 977 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
978 | wait_for_completion(&uverbs_dev->comp); |
979 | kfree(uverbs_dev); | |
bc38a6ab RD |
980 | return; |
981 | } | |
982 | ||
7c1eb45a | 983 | static void ib_uverbs_remove_one(struct ib_device *device, void *client_data) |
bc38a6ab | 984 | { |
7c1eb45a | 985 | struct ib_uverbs_device *uverbs_dev = client_data; |
bc38a6ab RD |
986 | |
987 | if (!uverbs_dev) | |
988 | return; | |
989 | ||
f4e91eb4 | 990 | dev_set_drvdata(uverbs_dev->dev, NULL); |
055422dd AC |
991 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
992 | cdev_del(&uverbs_dev->cdev); | |
70a30e16 | 993 | |
6d6a0e71 AC |
994 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
995 | clear_bit(uverbs_dev->devnum, dev_map); | |
996 | else | |
997 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); | |
fd60ae40 | 998 | |
70a30e16 | 999 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
1000 | wait_for_completion(&uverbs_dev->comp); |
1001 | kfree(uverbs_dev); | |
bc38a6ab RD |
1002 | } |
1003 | ||
2c9ede55 | 1004 | static char *uverbs_devnode(struct device *dev, umode_t *mode) |
71c29bd5 | 1005 | { |
b2bc4782 GR |
1006 | if (mode) |
1007 | *mode = 0666; | |
71c29bd5 RD |
1008 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
1009 | } | |
1010 | ||
bc38a6ab RD |
1011 | static int __init ib_uverbs_init(void) |
1012 | { | |
1013 | int ret; | |
1014 | ||
bc38a6ab RD |
1015 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
1016 | "infiniband_verbs"); | |
1017 | if (ret) { | |
1018 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
1019 | goto out; | |
1020 | } | |
1021 | ||
70a30e16 RD |
1022 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
1023 | if (IS_ERR(uverbs_class)) { | |
1024 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
1025 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
1026 | goto out_chrdev; | |
1027 | } | |
1028 | ||
71c29bd5 RD |
1029 | uverbs_class->devnode = uverbs_devnode; |
1030 | ||
0933e2d9 | 1031 | ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); |
bc38a6ab RD |
1032 | if (ret) { |
1033 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
1034 | goto out_class; | |
1035 | } | |
1036 | ||
bc38a6ab RD |
1037 | ret = ib_register_client(&uverbs_client); |
1038 | if (ret) { | |
1039 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
a265e558 | 1040 | goto out_class; |
bc38a6ab RD |
1041 | } |
1042 | ||
1043 | return 0; | |
1044 | ||
bc38a6ab | 1045 | out_class: |
70a30e16 | 1046 | class_destroy(uverbs_class); |
bc38a6ab RD |
1047 | |
1048 | out_chrdev: | |
1049 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
1050 | ||
1051 | out: | |
1052 | return ret; | |
1053 | } | |
1054 | ||
1055 | static void __exit ib_uverbs_cleanup(void) | |
1056 | { | |
1057 | ib_unregister_client(&uverbs_client); | |
70a30e16 | 1058 | class_destroy(uverbs_class); |
bc38a6ab | 1059 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
6d6a0e71 AC |
1060 | if (overflow_maj) |
1061 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); | |
5d7edb3c RD |
1062 | idr_destroy(&ib_uverbs_pd_idr); |
1063 | idr_destroy(&ib_uverbs_mr_idr); | |
1064 | idr_destroy(&ib_uverbs_mw_idr); | |
1065 | idr_destroy(&ib_uverbs_ah_idr); | |
1066 | idr_destroy(&ib_uverbs_cq_idr); | |
1067 | idr_destroy(&ib_uverbs_qp_idr); | |
1068 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
1069 | } |
1070 | ||
1071 | module_init(ib_uverbs_init); | |
1072 | module_exit(ib_uverbs_cleanup); |