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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 | ||
e6bd18f5 JG |
51 | #include <rdma/ib.h> |
52 | ||
bc38a6ab RD |
53 | #include "uverbs.h" |
54 | ||
55 | MODULE_AUTHOR("Roland Dreier"); | |
56 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
bc38a6ab RD |
59 | enum { |
60 | IB_UVERBS_MAJOR = 231, | |
61 | IB_UVERBS_BASE_MINOR = 192, | |
62 | IB_UVERBS_MAX_DEVICES = 32 | |
63 | }; | |
64 | ||
65 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) | |
66 | ||
70a30e16 RD |
67 | static struct class *uverbs_class; |
68 | ||
9ead190b | 69 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
70 | DEFINE_IDR(ib_uverbs_pd_idr); |
71 | DEFINE_IDR(ib_uverbs_mr_idr); | |
72 | DEFINE_IDR(ib_uverbs_mw_idr); | |
73 | DEFINE_IDR(ib_uverbs_ah_idr); | |
74 | DEFINE_IDR(ib_uverbs_cq_idr); | |
75 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 76 | DEFINE_IDR(ib_uverbs_srq_idr); |
53d0bd1e | 77 | DEFINE_IDR(ib_uverbs_xrcd_idr); |
436f2ad0 | 78 | DEFINE_IDR(ib_uverbs_rule_idr); |
f213c052 | 79 | DEFINE_IDR(ib_uverbs_wq_idr); |
de019a94 | 80 | DEFINE_IDR(ib_uverbs_rwq_ind_tbl_idr); |
bc38a6ab | 81 | |
6276e08a | 82 | static DEFINE_SPINLOCK(map_lock); |
bc38a6ab RD |
83 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
84 | ||
85 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
057aec0d | 86 | struct ib_device *ib_dev, |
bc38a6ab RD |
87 | const char __user *buf, int in_len, |
88 | int out_len) = { | |
9afed76d AC |
89 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
90 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
91 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
92 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
93 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
94 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
7e6edb9b | 95 | [IB_USER_VERBS_CMD_REREG_MR] = ib_uverbs_rereg_mr, |
9afed76d | 96 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, |
6b52a12b SM |
97 | [IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw, |
98 | [IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw, | |
6b73597e | 99 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
9afed76d AC |
100 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
101 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, | |
102 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, | |
103 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
104 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, | |
105 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
106 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, | |
107 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, | |
108 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
109 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, | |
110 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
111 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
112 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
113 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
114 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, | |
115 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
116 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
117 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
118 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, | |
119 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, | |
53d0bd1e SH |
120 | [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrcd, |
121 | [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrcd, | |
42849b26 | 122 | [IB_USER_VERBS_CMD_CREATE_XSRQ] = ib_uverbs_create_xsrq, |
436f2ad0 | 123 | [IB_USER_VERBS_CMD_OPEN_QP] = ib_uverbs_open_qp, |
f21519b2 YD |
124 | }; |
125 | ||
f21519b2 | 126 | static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file, |
057aec0d | 127 | struct ib_device *ib_dev, |
f21519b2 YD |
128 | struct ib_udata *ucore, |
129 | struct ib_udata *uhw) = { | |
130 | [IB_USER_VERBS_EX_CMD_CREATE_FLOW] = ib_uverbs_ex_create_flow, | |
5a77abf9 | 131 | [IB_USER_VERBS_EX_CMD_DESTROY_FLOW] = ib_uverbs_ex_destroy_flow, |
02d1aa7a | 132 | [IB_USER_VERBS_EX_CMD_QUERY_DEVICE] = ib_uverbs_ex_query_device, |
565197dd | 133 | [IB_USER_VERBS_EX_CMD_CREATE_CQ] = ib_uverbs_ex_create_cq, |
6d8a7497 | 134 | [IB_USER_VERBS_EX_CMD_CREATE_QP] = ib_uverbs_ex_create_qp, |
f213c052 YH |
135 | [IB_USER_VERBS_EX_CMD_CREATE_WQ] = ib_uverbs_ex_create_wq, |
136 | [IB_USER_VERBS_EX_CMD_MODIFY_WQ] = ib_uverbs_ex_modify_wq, | |
137 | [IB_USER_VERBS_EX_CMD_DESTROY_WQ] = ib_uverbs_ex_destroy_wq, | |
de019a94 YH |
138 | [IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL] = ib_uverbs_ex_create_rwq_ind_table, |
139 | [IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL] = ib_uverbs_ex_destroy_rwq_ind_table, | |
bc38a6ab RD |
140 | }; |
141 | ||
bc38a6ab | 142 | static void ib_uverbs_add_one(struct ib_device *device); |
7c1eb45a | 143 | static void ib_uverbs_remove_one(struct ib_device *device, void *client_data); |
bc38a6ab | 144 | |
feb7c1e3 CH |
145 | int uverbs_dealloc_mw(struct ib_mw *mw) |
146 | { | |
147 | struct ib_pd *pd = mw->pd; | |
148 | int ret; | |
149 | ||
150 | ret = mw->device->dealloc_mw(mw); | |
151 | if (!ret) | |
152 | atomic_dec(&pd->usecnt); | |
153 | return ret; | |
154 | } | |
155 | ||
35d4a0b6 | 156 | static void ib_uverbs_release_dev(struct kobject *kobj) |
70a30e16 RD |
157 | { |
158 | struct ib_uverbs_device *dev = | |
35d4a0b6 | 159 | container_of(kobj, struct ib_uverbs_device, kobj); |
70a30e16 | 160 | |
036b1063 | 161 | cleanup_srcu_struct(&dev->disassociate_srcu); |
35d4a0b6 | 162 | kfree(dev); |
70a30e16 RD |
163 | } |
164 | ||
35d4a0b6 YH |
165 | static struct kobj_type ib_uverbs_dev_ktype = { |
166 | .release = ib_uverbs_release_dev, | |
167 | }; | |
168 | ||
04d29b0e RD |
169 | static void ib_uverbs_release_event_file(struct kref *ref) |
170 | { | |
171 | struct ib_uverbs_event_file *file = | |
172 | container_of(ref, struct ib_uverbs_event_file, ref); | |
173 | ||
174 | kfree(file); | |
175 | } | |
176 | ||
70a30e16 RD |
177 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
178 | struct ib_uverbs_event_file *ev_file, | |
179 | struct ib_ucq_object *uobj) | |
180 | { | |
181 | struct ib_uverbs_event *evt, *tmp; | |
182 | ||
183 | if (ev_file) { | |
184 | spin_lock_irq(&ev_file->lock); | |
185 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
186 | list_del(&evt->list); | |
187 | kfree(evt); | |
188 | } | |
189 | spin_unlock_irq(&ev_file->lock); | |
190 | ||
191 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
192 | } | |
193 | ||
194 | spin_lock_irq(&file->async_file->lock); | |
195 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
196 | list_del(&evt->list); | |
197 | kfree(evt); | |
198 | } | |
199 | spin_unlock_irq(&file->async_file->lock); | |
200 | } | |
201 | ||
202 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
203 | struct ib_uevent_object *uobj) | |
204 | { | |
205 | struct ib_uverbs_event *evt, *tmp; | |
206 | ||
207 | spin_lock_irq(&file->async_file->lock); | |
208 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
209 | list_del(&evt->list); | |
210 | kfree(evt); | |
211 | } | |
212 | spin_unlock_irq(&file->async_file->lock); | |
213 | } | |
214 | ||
f4e40156 JM |
215 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
216 | struct ib_uqp_object *uobj) | |
217 | { | |
218 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
219 | ||
220 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
221 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
222 | list_del(&mcast->list); | |
223 | kfree(mcast); | |
224 | } | |
225 | } | |
226 | ||
70a30e16 RD |
227 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
228 | struct ib_ucontext *context) | |
bc38a6ab RD |
229 | { |
230 | struct ib_uobject *uobj, *tmp; | |
231 | ||
f7c6a7b5 RD |
232 | context->closing = 1; |
233 | ||
67cdb40c | 234 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
235 | struct ib_ah *ah = uobj->object; |
236 | ||
237 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 238 | ib_destroy_ah(ah); |
67cdb40c RD |
239 | kfree(uobj); |
240 | } | |
bc38a6ab | 241 | |
6b52a12b SM |
242 | /* Remove MWs before QPs, in order to support type 2A MWs. */ |
243 | list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) { | |
244 | struct ib_mw *mw = uobj->object; | |
245 | ||
246 | idr_remove_uobj(&ib_uverbs_mw_idr, uobj); | |
feb7c1e3 | 247 | uverbs_dealloc_mw(mw); |
6b52a12b SM |
248 | kfree(uobj); |
249 | } | |
250 | ||
436f2ad0 HHZ |
251 | list_for_each_entry_safe(uobj, tmp, &context->rule_list, list) { |
252 | struct ib_flow *flow_id = uobj->object; | |
253 | ||
254 | idr_remove_uobj(&ib_uverbs_rule_idr, uobj); | |
255 | ib_destroy_flow(flow_id); | |
256 | kfree(uobj); | |
257 | } | |
258 | ||
bc38a6ab | 259 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { |
9ead190b | 260 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
261 | struct ib_uqp_object *uqp = |
262 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
263 | |
264 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
0e0ec7e0 SH |
265 | if (qp != qp->real_qp) { |
266 | ib_close_qp(qp); | |
b93f3c18 SH |
267 | } else { |
268 | ib_uverbs_detach_umcast(qp, uqp); | |
269 | ib_destroy_qp(qp); | |
270 | } | |
f4e40156 JM |
271 | ib_uverbs_release_uevent(file, &uqp->uevent); |
272 | kfree(uqp); | |
bc38a6ab RD |
273 | } |
274 | ||
de019a94 YH |
275 | list_for_each_entry_safe(uobj, tmp, &context->rwq_ind_tbl_list, list) { |
276 | struct ib_rwq_ind_table *rwq_ind_tbl = uobj->object; | |
277 | struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl; | |
278 | ||
279 | idr_remove_uobj(&ib_uverbs_rwq_ind_tbl_idr, uobj); | |
280 | ib_destroy_rwq_ind_table(rwq_ind_tbl); | |
281 | kfree(ind_tbl); | |
282 | kfree(uobj); | |
283 | } | |
284 | ||
f213c052 YH |
285 | list_for_each_entry_safe(uobj, tmp, &context->wq_list, list) { |
286 | struct ib_wq *wq = uobj->object; | |
287 | struct ib_uwq_object *uwq = | |
288 | container_of(uobj, struct ib_uwq_object, uevent.uobject); | |
289 | ||
290 | idr_remove_uobj(&ib_uverbs_wq_idr, uobj); | |
291 | ib_destroy_wq(wq); | |
292 | ib_uverbs_release_uevent(file, &uwq->uevent); | |
293 | kfree(uwq); | |
294 | } | |
295 | ||
a233c4b5 SD |
296 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
297 | struct ib_srq *srq = uobj->object; | |
298 | struct ib_uevent_object *uevent = | |
299 | container_of(uobj, struct ib_uevent_object, uobject); | |
300 | ||
301 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
302 | ib_destroy_srq(srq); | |
303 | ib_uverbs_release_uevent(file, uevent); | |
304 | kfree(uevent); | |
305 | } | |
306 | ||
bc38a6ab | 307 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { |
9ead190b | 308 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
309 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
310 | struct ib_ucq_object *ucq = | |
311 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
312 | |
313 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 314 | ib_destroy_cq(cq); |
70a30e16 RD |
315 | ib_uverbs_release_ucq(file, ev_file, ucq); |
316 | kfree(ucq); | |
bc38a6ab RD |
317 | } |
318 | ||
bc38a6ab | 319 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { |
9ead190b | 320 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 321 | |
9ead190b | 322 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 323 | ib_dereg_mr(mr); |
f7c6a7b5 | 324 | kfree(uobj); |
bc38a6ab RD |
325 | } |
326 | ||
53d0bd1e SH |
327 | mutex_lock(&file->device->xrcd_tree_mutex); |
328 | list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) { | |
329 | struct ib_xrcd *xrcd = uobj->object; | |
330 | struct ib_uxrcd_object *uxrcd = | |
331 | container_of(uobj, struct ib_uxrcd_object, uobject); | |
332 | ||
333 | idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj); | |
334 | ib_uverbs_dealloc_xrcd(file->device, xrcd); | |
335 | kfree(uxrcd); | |
336 | } | |
337 | mutex_unlock(&file->device->xrcd_tree_mutex); | |
338 | ||
bc38a6ab | 339 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { |
9ead190b RD |
340 | struct ib_pd *pd = uobj->object; |
341 | ||
342 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 343 | ib_dealloc_pd(pd); |
bc38a6ab RD |
344 | kfree(uobj); |
345 | } | |
346 | ||
8ada2c1c SR |
347 | put_pid(context->tgid); |
348 | ||
bc38a6ab RD |
349 | return context->device->dealloc_ucontext(context); |
350 | } | |
351 | ||
35d4a0b6 YH |
352 | static void ib_uverbs_comp_dev(struct ib_uverbs_device *dev) |
353 | { | |
354 | complete(&dev->comp); | |
355 | } | |
356 | ||
bc38a6ab RD |
357 | static void ib_uverbs_release_file(struct kref *ref) |
358 | { | |
359 | struct ib_uverbs_file *file = | |
360 | container_of(ref, struct ib_uverbs_file, ref); | |
036b1063 YH |
361 | struct ib_device *ib_dev; |
362 | int srcu_key; | |
363 | ||
364 | srcu_key = srcu_read_lock(&file->device->disassociate_srcu); | |
365 | ib_dev = srcu_dereference(file->device->ib_dev, | |
366 | &file->device->disassociate_srcu); | |
367 | if (ib_dev && !ib_dev->disassociate_ucontext) | |
368 | module_put(ib_dev->owner); | |
369 | srcu_read_unlock(&file->device->disassociate_srcu, srcu_key); | |
bc38a6ab | 370 | |
35d4a0b6 YH |
371 | if (atomic_dec_and_test(&file->device->refcount)) |
372 | ib_uverbs_comp_dev(file->device); | |
70a30e16 | 373 | |
bc38a6ab RD |
374 | kfree(file); |
375 | } | |
376 | ||
377 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
378 | size_t count, loff_t *pos) | |
379 | { | |
380 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 381 | struct ib_uverbs_event *event; |
bc38a6ab RD |
382 | int eventsz; |
383 | int ret = 0; | |
384 | ||
385 | spin_lock_irq(&file->lock); | |
386 | ||
6b73597e | 387 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
388 | spin_unlock_irq(&file->lock); |
389 | ||
390 | if (filp->f_flags & O_NONBLOCK) | |
391 | return -EAGAIN; | |
392 | ||
393 | if (wait_event_interruptible(file->poll_wait, | |
036b1063 YH |
394 | (!list_empty(&file->event_list) || |
395 | /* The barriers built into wait_event_interruptible() | |
396 | * and wake_up() guarentee this will see the null set | |
397 | * without using RCU | |
398 | */ | |
399 | !file->uverbs_file->device->ib_dev))) | |
bc38a6ab RD |
400 | return -ERESTARTSYS; |
401 | ||
036b1063 YH |
402 | /* If device was disassociated and no event exists set an error */ |
403 | if (list_empty(&file->event_list) && | |
404 | !file->uverbs_file->device->ib_dev) | |
405 | return -EIO; | |
406 | ||
bc38a6ab RD |
407 | spin_lock_irq(&file->lock); |
408 | } | |
409 | ||
63aaf647 RD |
410 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
411 | ||
412 | if (file->is_async) | |
bc38a6ab | 413 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 414 | else |
bc38a6ab | 415 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
416 | |
417 | if (eventsz > count) { | |
418 | ret = -EINVAL; | |
419 | event = NULL; | |
63aaf647 | 420 | } else { |
bc38a6ab | 421 | list_del(file->event_list.next); |
63aaf647 RD |
422 | if (event->counter) { |
423 | ++(*event->counter); | |
424 | list_del(&event->obj_list); | |
425 | } | |
426 | } | |
bc38a6ab RD |
427 | |
428 | spin_unlock_irq(&file->lock); | |
429 | ||
430 | if (event) { | |
431 | if (copy_to_user(buf, event, eventsz)) | |
432 | ret = -EFAULT; | |
433 | else | |
434 | ret = eventsz; | |
435 | } | |
436 | ||
437 | kfree(event); | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
443 | struct poll_table_struct *wait) | |
444 | { | |
445 | unsigned int pollflags = 0; | |
446 | struct ib_uverbs_event_file *file = filp->private_data; | |
447 | ||
448 | poll_wait(filp, &file->poll_wait, wait); | |
449 | ||
450 | spin_lock_irq(&file->lock); | |
6b73597e | 451 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
452 | pollflags = POLLIN | POLLRDNORM; |
453 | spin_unlock_irq(&file->lock); | |
454 | ||
455 | return pollflags; | |
456 | } | |
457 | ||
abdf119b GN |
458 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
459 | { | |
460 | struct ib_uverbs_event_file *file = filp->private_data; | |
461 | ||
462 | return fasync_helper(fd, filp, on, &file->async_queue); | |
463 | } | |
464 | ||
bc38a6ab RD |
465 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
466 | { | |
467 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e | 468 | struct ib_uverbs_event *entry, *tmp; |
036b1063 | 469 | int closed_already = 0; |
6b73597e | 470 | |
036b1063 | 471 | mutex_lock(&file->uverbs_file->device->lists_mutex); |
6b73597e | 472 | spin_lock_irq(&file->lock); |
036b1063 | 473 | closed_already = file->is_closed; |
1ae5c187 | 474 | file->is_closed = 1; |
6b73597e RD |
475 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
476 | if (entry->counter) | |
477 | list_del(&entry->obj_list); | |
478 | kfree(entry); | |
479 | } | |
480 | spin_unlock_irq(&file->lock); | |
036b1063 YH |
481 | if (!closed_already) { |
482 | list_del(&file->list); | |
483 | if (file->is_async) | |
484 | ib_unregister_event_handler(&file->uverbs_file-> | |
485 | event_handler); | |
486 | } | |
487 | mutex_unlock(&file->uverbs_file->device->lists_mutex); | |
bc38a6ab | 488 | |
03c40442 | 489 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); |
6b73597e | 490 | kref_put(&file->ref, ib_uverbs_release_event_file); |
bc38a6ab RD |
491 | |
492 | return 0; | |
493 | } | |
494 | ||
2b8693c0 | 495 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 496 | .owner = THIS_MODULE, |
9afed76d | 497 | .read = ib_uverbs_event_read, |
bc38a6ab | 498 | .poll = ib_uverbs_event_poll, |
abdf119b | 499 | .release = ib_uverbs_event_close, |
bc1db9af RD |
500 | .fasync = ib_uverbs_event_fasync, |
501 | .llseek = no_llseek, | |
bc38a6ab RD |
502 | }; |
503 | ||
504 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
505 | { | |
6b73597e RD |
506 | struct ib_uverbs_event_file *file = cq_context; |
507 | struct ib_ucq_object *uobj; | |
508 | struct ib_uverbs_event *entry; | |
509 | unsigned long flags; | |
510 | ||
511 | if (!file) | |
512 | return; | |
513 | ||
514 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 515 | if (file->is_closed) { |
6b73597e RD |
516 | spin_unlock_irqrestore(&file->lock, flags); |
517 | return; | |
518 | } | |
bc38a6ab RD |
519 | |
520 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
521 | if (!entry) { |
522 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 523 | return; |
305a7e87 | 524 | } |
bc38a6ab | 525 | |
63aaf647 RD |
526 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
527 | ||
528 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
529 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 530 | |
6b73597e | 531 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 532 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 533 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 534 | |
6b73597e RD |
535 | wake_up_interruptible(&file->poll_wait); |
536 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
537 | } |
538 | ||
539 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
540 | __u64 element, __u64 event, |
541 | struct list_head *obj_list, | |
542 | u32 *counter) | |
bc38a6ab | 543 | { |
63aaf647 | 544 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
545 | unsigned long flags; |
546 | ||
6b73597e | 547 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 548 | if (file->async_file->is_closed) { |
6b73597e RD |
549 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
550 | return; | |
551 | } | |
552 | ||
bc38a6ab | 553 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
554 | if (!entry) { |
555 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 556 | return; |
305a7e87 | 557 | } |
bc38a6ab | 558 | |
63aaf647 RD |
559 | entry->desc.async.element = element; |
560 | entry->desc.async.event_type = event; | |
377b5134 | 561 | entry->desc.async.reserved = 0; |
63aaf647 | 562 | entry->counter = counter; |
bc38a6ab | 563 | |
6b73597e | 564 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
565 | if (obj_list) |
566 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 567 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 568 | |
6b73597e RD |
569 | wake_up_interruptible(&file->async_file->poll_wait); |
570 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
571 | } |
572 | ||
573 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
574 | { | |
7162a3e0 RD |
575 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
576 | struct ib_ucq_object, uobject); | |
63aaf647 | 577 | |
7162a3e0 | 578 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
579 | event->event, &uobj->async_list, |
580 | &uobj->async_events_reported); | |
bc38a6ab RD |
581 | } |
582 | ||
583 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
584 | { | |
63aaf647 RD |
585 | struct ib_uevent_object *uobj; |
586 | ||
a040f95d JM |
587 | /* for XRC target qp's, check that qp is live */ |
588 | if (!event->element.qp->uobject || !event->element.qp->uobject->live) | |
589 | return; | |
590 | ||
63aaf647 RD |
591 | uobj = container_of(event->element.qp->uobject, |
592 | struct ib_uevent_object, uobject); | |
593 | ||
594 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
595 | event->event, &uobj->event_list, | |
596 | &uobj->events_reported); | |
bc38a6ab RD |
597 | } |
598 | ||
f213c052 YH |
599 | void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr) |
600 | { | |
601 | struct ib_uevent_object *uobj = container_of(event->element.wq->uobject, | |
602 | struct ib_uevent_object, uobject); | |
603 | ||
604 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
605 | event->event, &uobj->event_list, | |
606 | &uobj->events_reported); | |
607 | } | |
608 | ||
f520ba5a RD |
609 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
610 | { | |
63aaf647 RD |
611 | struct ib_uevent_object *uobj; |
612 | ||
613 | uobj = container_of(event->element.srq->uobject, | |
614 | struct ib_uevent_object, uobject); | |
615 | ||
616 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
617 | event->event, &uobj->event_list, | |
618 | &uobj->events_reported); | |
f520ba5a RD |
619 | } |
620 | ||
6b73597e RD |
621 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
622 | struct ib_event *event) | |
bc38a6ab RD |
623 | { |
624 | struct ib_uverbs_file *file = | |
625 | container_of(handler, struct ib_uverbs_file, event_handler); | |
626 | ||
63aaf647 RD |
627 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
628 | NULL, NULL); | |
bc38a6ab RD |
629 | } |
630 | ||
03c40442 YH |
631 | void ib_uverbs_free_async_event_file(struct ib_uverbs_file *file) |
632 | { | |
633 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
634 | file->async_file = NULL; | |
635 | } | |
636 | ||
6b73597e | 637 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
057aec0d | 638 | struct ib_device *ib_dev, |
b1e4594b | 639 | int is_async) |
bc38a6ab | 640 | { |
6b73597e | 641 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab | 642 | struct file *filp; |
03c40442 | 643 | int ret; |
bc38a6ab | 644 | |
03c40442 | 645 | ev_file = kzalloc(sizeof(*ev_file), GFP_KERNEL); |
6b73597e RD |
646 | if (!ev_file) |
647 | return ERR_PTR(-ENOMEM); | |
648 | ||
649 | kref_init(&ev_file->ref); | |
650 | spin_lock_init(&ev_file->lock); | |
651 | INIT_LIST_HEAD(&ev_file->event_list); | |
652 | init_waitqueue_head(&ev_file->poll_wait); | |
653 | ev_file->uverbs_file = uverbs_file; | |
03c40442 | 654 | kref_get(&ev_file->uverbs_file->ref); |
6b73597e | 655 | ev_file->async_queue = NULL; |
1ae5c187 | 656 | ev_file->is_closed = 0; |
6b73597e | 657 | |
b1e4594b | 658 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
a265e558 | 659 | ev_file, O_RDONLY); |
b1e4594b | 660 | if (IS_ERR(filp)) |
03c40442 YH |
661 | goto err_put_refs; |
662 | ||
036b1063 YH |
663 | mutex_lock(&uverbs_file->device->lists_mutex); |
664 | list_add_tail(&ev_file->list, | |
665 | &uverbs_file->device->uverbs_events_file_list); | |
666 | mutex_unlock(&uverbs_file->device->lists_mutex); | |
667 | ||
03c40442 YH |
668 | if (is_async) { |
669 | WARN_ON(uverbs_file->async_file); | |
670 | uverbs_file->async_file = ev_file; | |
671 | kref_get(&uverbs_file->async_file->ref); | |
672 | INIT_IB_EVENT_HANDLER(&uverbs_file->event_handler, | |
057aec0d | 673 | ib_dev, |
03c40442 YH |
674 | ib_uverbs_event_handler); |
675 | ret = ib_register_event_handler(&uverbs_file->event_handler); | |
676 | if (ret) | |
677 | goto err_put_file; | |
678 | ||
679 | /* At that point async file stuff was fully set */ | |
680 | ev_file->is_async = 1; | |
681 | } | |
682 | ||
683 | return filp; | |
684 | ||
685 | err_put_file: | |
686 | fput(filp); | |
687 | kref_put(&uverbs_file->async_file->ref, ib_uverbs_release_event_file); | |
688 | uverbs_file->async_file = NULL; | |
689 | return ERR_PTR(ret); | |
a7dab9e8 | 690 | |
03c40442 YH |
691 | err_put_refs: |
692 | kref_put(&ev_file->uverbs_file->ref, ib_uverbs_release_file); | |
693 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
6b73597e | 694 | return filp; |
6b73597e RD |
695 | } |
696 | ||
697 | /* | |
698 | * Look up a completion event file by FD. If lookup is successful, | |
699 | * takes a ref to the event file struct that it returns; if | |
700 | * unsuccessful, returns NULL. | |
701 | */ | |
702 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
703 | { | |
704 | struct ib_uverbs_event_file *ev_file = NULL; | |
2903ff01 | 705 | struct fd f = fdget(fd); |
6b73597e | 706 | |
2903ff01 | 707 | if (!f.file) |
6b73597e RD |
708 | return NULL; |
709 | ||
2903ff01 | 710 | if (f.file->f_op != &uverbs_event_fops) |
6b73597e RD |
711 | goto out; |
712 | ||
2903ff01 | 713 | ev_file = f.file->private_data; |
6b73597e RD |
714 | if (ev_file->is_async) { |
715 | ev_file = NULL; | |
716 | goto out; | |
717 | } | |
718 | ||
719 | kref_get(&ev_file->ref); | |
720 | ||
721 | out: | |
2903ff01 | 722 | fdput(f); |
6b73597e | 723 | return ev_file; |
bc38a6ab RD |
724 | } |
725 | ||
2dbd5186 EC |
726 | static int verify_command_mask(struct ib_device *ib_dev, __u32 command) |
727 | { | |
728 | u64 mask; | |
729 | ||
730 | if (command <= IB_USER_VERBS_CMD_OPEN_QP) | |
731 | mask = ib_dev->uverbs_cmd_mask; | |
732 | else | |
733 | mask = ib_dev->uverbs_ex_cmd_mask; | |
734 | ||
735 | if (mask & ((u64)1 << command)) | |
736 | return 0; | |
737 | ||
738 | return -1; | |
739 | } | |
740 | ||
bc38a6ab RD |
741 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, |
742 | size_t count, loff_t *pos) | |
743 | { | |
744 | struct ib_uverbs_file *file = filp->private_data; | |
036b1063 | 745 | struct ib_device *ib_dev; |
bc38a6ab | 746 | struct ib_uverbs_cmd_hdr hdr; |
74a0b0a5 | 747 | __u32 command; |
f21519b2 | 748 | __u32 flags; |
036b1063 YH |
749 | int srcu_key; |
750 | ssize_t ret; | |
057aec0d | 751 | |
e6bd18f5 JG |
752 | if (WARN_ON_ONCE(!ib_safe_file_access(filp))) |
753 | return -EACCES; | |
754 | ||
bc38a6ab RD |
755 | if (count < sizeof hdr) |
756 | return -EINVAL; | |
757 | ||
758 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
759 | return -EFAULT; | |
760 | ||
036b1063 YH |
761 | srcu_key = srcu_read_lock(&file->device->disassociate_srcu); |
762 | ib_dev = srcu_dereference(file->device->ib_dev, | |
763 | &file->device->disassociate_srcu); | |
764 | if (!ib_dev) { | |
765 | ret = -EIO; | |
766 | goto out; | |
767 | } | |
768 | ||
74a0b0a5 EC |
769 | if (hdr.command & ~(__u32)(IB_USER_VERBS_CMD_FLAGS_MASK | |
770 | IB_USER_VERBS_CMD_COMMAND_MASK)) { | |
771 | ret = -EINVAL; | |
772 | goto out; | |
773 | } | |
774 | ||
775 | command = hdr.command & IB_USER_VERBS_CMD_COMMAND_MASK; | |
2dbd5186 EC |
776 | if (verify_command_mask(ib_dev, command)) { |
777 | ret = -EOPNOTSUPP; | |
778 | goto out; | |
779 | } | |
74a0b0a5 | 780 | |
eaebc7d2 EC |
781 | if (!file->ucontext && |
782 | command != IB_USER_VERBS_CMD_GET_CONTEXT) { | |
783 | ret = -EINVAL; | |
784 | goto out; | |
785 | } | |
786 | ||
f21519b2 YD |
787 | flags = (hdr.command & |
788 | IB_USER_VERBS_CMD_FLAGS_MASK) >> IB_USER_VERBS_CMD_FLAGS_SHIFT; | |
bc38a6ab | 789 | |
f21519b2 | 790 | if (!flags) { |
f21519b2 | 791 | if (command >= ARRAY_SIZE(uverbs_cmd_table) || |
036b1063 YH |
792 | !uverbs_cmd_table[command]) { |
793 | ret = -EINVAL; | |
794 | goto out; | |
795 | } | |
400dbc96 | 796 | |
036b1063 YH |
797 | if (hdr.in_words * 4 != count) { |
798 | ret = -EINVAL; | |
799 | goto out; | |
800 | } | |
400dbc96 | 801 | |
036b1063 | 802 | ret = uverbs_cmd_table[command](file, ib_dev, |
f21519b2 YD |
803 | buf + sizeof(hdr), |
804 | hdr.in_words * 4, | |
805 | hdr.out_words * 4); | |
806 | ||
f21519b2 | 807 | } else if (flags == IB_USER_VERBS_CMD_FLAG_EXTENDED) { |
f21519b2 YD |
808 | struct ib_uverbs_ex_cmd_hdr ex_hdr; |
809 | struct ib_udata ucore; | |
810 | struct ib_udata uhw; | |
f21519b2 YD |
811 | size_t written_count = count; |
812 | ||
f21519b2 | 813 | if (command >= ARRAY_SIZE(uverbs_ex_cmd_table) || |
036b1063 YH |
814 | !uverbs_ex_cmd_table[command]) { |
815 | ret = -ENOSYS; | |
816 | goto out; | |
817 | } | |
f21519b2 | 818 | |
036b1063 YH |
819 | if (!file->ucontext) { |
820 | ret = -EINVAL; | |
821 | goto out; | |
822 | } | |
f21519b2 | 823 | |
036b1063 YH |
824 | if (count < (sizeof(hdr) + sizeof(ex_hdr))) { |
825 | ret = -EINVAL; | |
826 | goto out; | |
827 | } | |
f21519b2 | 828 | |
036b1063 YH |
829 | if (copy_from_user(&ex_hdr, buf + sizeof(hdr), sizeof(ex_hdr))) { |
830 | ret = -EFAULT; | |
831 | goto out; | |
832 | } | |
f21519b2 YD |
833 | |
834 | count -= sizeof(hdr) + sizeof(ex_hdr); | |
835 | buf += sizeof(hdr) + sizeof(ex_hdr); | |
836 | ||
036b1063 YH |
837 | if ((hdr.in_words + ex_hdr.provider_in_words) * 8 != count) { |
838 | ret = -EINVAL; | |
839 | goto out; | |
840 | } | |
f21519b2 | 841 | |
036b1063 YH |
842 | if (ex_hdr.cmd_hdr_reserved) { |
843 | ret = -EINVAL; | |
844 | goto out; | |
845 | } | |
7efb1b19 | 846 | |
f21519b2 | 847 | if (ex_hdr.response) { |
036b1063 YH |
848 | if (!hdr.out_words && !ex_hdr.provider_out_words) { |
849 | ret = -EINVAL; | |
850 | goto out; | |
851 | } | |
6cc3df84 YD |
852 | |
853 | if (!access_ok(VERIFY_WRITE, | |
854 | (void __user *) (unsigned long) ex_hdr.response, | |
036b1063 YH |
855 | (hdr.out_words + ex_hdr.provider_out_words) * 8)) { |
856 | ret = -EFAULT; | |
857 | goto out; | |
858 | } | |
f21519b2 | 859 | } else { |
036b1063 YH |
860 | if (hdr.out_words || ex_hdr.provider_out_words) { |
861 | ret = -EINVAL; | |
862 | goto out; | |
863 | } | |
f21519b2 YD |
864 | } |
865 | ||
a96e4e2f RD |
866 | INIT_UDATA_BUF_OR_NULL(&ucore, buf, (unsigned long) ex_hdr.response, |
867 | hdr.in_words * 8, hdr.out_words * 8); | |
868 | ||
869 | INIT_UDATA_BUF_OR_NULL(&uhw, | |
870 | buf + ucore.inlen, | |
871 | (unsigned long) ex_hdr.response + ucore.outlen, | |
872 | ex_hdr.provider_in_words * 8, | |
873 | ex_hdr.provider_out_words * 8); | |
f21519b2 | 874 | |
036b1063 | 875 | ret = uverbs_ex_cmd_table[command](file, |
057aec0d | 876 | ib_dev, |
f21519b2 YD |
877 | &ucore, |
878 | &uhw); | |
036b1063 YH |
879 | if (!ret) |
880 | ret = written_count; | |
881 | } else { | |
882 | ret = -ENOSYS; | |
400dbc96 | 883 | } |
f21519b2 | 884 | |
036b1063 YH |
885 | out: |
886 | srcu_read_unlock(&file->device->disassociate_srcu, srcu_key); | |
887 | return ret; | |
bc38a6ab RD |
888 | } |
889 | ||
890 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
891 | { | |
892 | struct ib_uverbs_file *file = filp->private_data; | |
036b1063 YH |
893 | struct ib_device *ib_dev; |
894 | int ret = 0; | |
895 | int srcu_key; | |
bc38a6ab | 896 | |
036b1063 YH |
897 | srcu_key = srcu_read_lock(&file->device->disassociate_srcu); |
898 | ib_dev = srcu_dereference(file->device->ib_dev, | |
899 | &file->device->disassociate_srcu); | |
900 | if (!ib_dev) { | |
901 | ret = -EIO; | |
902 | goto out; | |
903 | } | |
904 | ||
905 | if (!file->ucontext) | |
906 | ret = -ENODEV; | |
bc38a6ab | 907 | else |
036b1063 YH |
908 | ret = ib_dev->mmap(file->ucontext, vma); |
909 | out: | |
910 | srcu_read_unlock(&file->device->disassociate_srcu, srcu_key); | |
911 | return ret; | |
bc38a6ab RD |
912 | } |
913 | ||
5b2d281a RD |
914 | /* |
915 | * ib_uverbs_open() does not need the BKL: | |
916 | * | |
2a72f212 | 917 | * - the ib_uverbs_device structures are properly reference counted and |
5b2d281a RD |
918 | * everything else is purely local to the file being created, so |
919 | * races against other open calls are not a problem; | |
920 | * - there is no ioctl method to race against; | |
2a72f212 AC |
921 | * - the open method will either immediately run -ENXIO, or all |
922 | * required initialization will be done. | |
5b2d281a | 923 | */ |
bc38a6ab RD |
924 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
925 | { | |
70a30e16 | 926 | struct ib_uverbs_device *dev; |
bc38a6ab | 927 | struct ib_uverbs_file *file; |
036b1063 | 928 | struct ib_device *ib_dev; |
70a30e16 | 929 | int ret; |
036b1063 YH |
930 | int module_dependent; |
931 | int srcu_key; | |
bc38a6ab | 932 | |
2a72f212 | 933 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
35d4a0b6 | 934 | if (!atomic_inc_not_zero(&dev->refcount)) |
70a30e16 RD |
935 | return -ENXIO; |
936 | ||
036b1063 YH |
937 | srcu_key = srcu_read_lock(&dev->disassociate_srcu); |
938 | mutex_lock(&dev->lists_mutex); | |
939 | ib_dev = srcu_dereference(dev->ib_dev, | |
940 | &dev->disassociate_srcu); | |
941 | if (!ib_dev) { | |
942 | ret = -EIO; | |
70a30e16 RD |
943 | goto err; |
944 | } | |
bc38a6ab | 945 | |
036b1063 YH |
946 | /* In case IB device supports disassociate ucontext, there is no hard |
947 | * dependency between uverbs device and its low level device. | |
948 | */ | |
949 | module_dependent = !(ib_dev->disassociate_ucontext); | |
950 | ||
951 | if (module_dependent) { | |
952 | if (!try_module_get(ib_dev->owner)) { | |
953 | ret = -ENODEV; | |
954 | goto err; | |
955 | } | |
956 | } | |
957 | ||
958 | file = kzalloc(sizeof(*file), GFP_KERNEL); | |
63c47c28 | 959 | if (!file) { |
70a30e16 | 960 | ret = -ENOMEM; |
036b1063 YH |
961 | if (module_dependent) |
962 | goto err_module; | |
963 | ||
964 | goto err; | |
63c47c28 | 965 | } |
bc38a6ab | 966 | |
70a30e16 RD |
967 | file->device = dev; |
968 | file->ucontext = NULL; | |
969 | file->async_file = NULL; | |
bc38a6ab | 970 | kref_init(&file->ref); |
95ed644f | 971 | mutex_init(&file->mutex); |
bc38a6ab | 972 | |
bc38a6ab | 973 | filp->private_data = file; |
35d4a0b6 | 974 | kobject_get(&dev->kobj); |
036b1063 YH |
975 | list_add_tail(&file->list, &dev->uverbs_file_list); |
976 | mutex_unlock(&dev->lists_mutex); | |
977 | srcu_read_unlock(&dev->disassociate_srcu, srcu_key); | |
bc38a6ab | 978 | |
bc1db9af | 979 | return nonseekable_open(inode, filp); |
70a30e16 RD |
980 | |
981 | err_module: | |
036b1063 | 982 | module_put(ib_dev->owner); |
70a30e16 RD |
983 | |
984 | err: | |
036b1063 YH |
985 | mutex_unlock(&dev->lists_mutex); |
986 | srcu_read_unlock(&dev->disassociate_srcu, srcu_key); | |
35d4a0b6 YH |
987 | if (atomic_dec_and_test(&dev->refcount)) |
988 | ib_uverbs_comp_dev(dev); | |
989 | ||
70a30e16 | 990 | return ret; |
bc38a6ab RD |
991 | } |
992 | ||
993 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
994 | { | |
995 | struct ib_uverbs_file *file = filp->private_data; | |
35d4a0b6 | 996 | struct ib_uverbs_device *dev = file->device; |
036b1063 YH |
997 | struct ib_ucontext *ucontext = NULL; |
998 | ||
999 | mutex_lock(&file->device->lists_mutex); | |
1000 | ucontext = file->ucontext; | |
1001 | file->ucontext = NULL; | |
1002 | if (!file->is_closed) { | |
1003 | list_del(&file->list); | |
1004 | file->is_closed = 1; | |
1005 | } | |
1006 | mutex_unlock(&file->device->lists_mutex); | |
1007 | if (ucontext) | |
1008 | ib_uverbs_cleanup_ucontext(file, ucontext); | |
70a30e16 RD |
1009 | |
1010 | if (file->async_file) | |
1011 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 1012 | |
bc38a6ab | 1013 | kref_put(&file->ref, ib_uverbs_release_file); |
35d4a0b6 | 1014 | kobject_put(&dev->kobj); |
bc38a6ab RD |
1015 | |
1016 | return 0; | |
1017 | } | |
1018 | ||
2b8693c0 | 1019 | static const struct file_operations uverbs_fops = { |
9afed76d AC |
1020 | .owner = THIS_MODULE, |
1021 | .write = ib_uverbs_write, | |
1022 | .open = ib_uverbs_open, | |
bc1db9af RD |
1023 | .release = ib_uverbs_close, |
1024 | .llseek = no_llseek, | |
bc38a6ab RD |
1025 | }; |
1026 | ||
2b8693c0 | 1027 | static const struct file_operations uverbs_mmap_fops = { |
9afed76d AC |
1028 | .owner = THIS_MODULE, |
1029 | .write = ib_uverbs_write, | |
bc38a6ab | 1030 | .mmap = ib_uverbs_mmap, |
9afed76d | 1031 | .open = ib_uverbs_open, |
bc1db9af RD |
1032 | .release = ib_uverbs_close, |
1033 | .llseek = no_llseek, | |
bc38a6ab RD |
1034 | }; |
1035 | ||
1036 | static struct ib_client uverbs_client = { | |
1037 | .name = "uverbs", | |
1038 | .add = ib_uverbs_add_one, | |
1039 | .remove = ib_uverbs_remove_one | |
1040 | }; | |
1041 | ||
f4e91eb4 TJ |
1042 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
1043 | char *buf) | |
bc38a6ab | 1044 | { |
036b1063 YH |
1045 | int ret = -ENODEV; |
1046 | int srcu_key; | |
f4e91eb4 | 1047 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
036b1063 | 1048 | struct ib_device *ib_dev; |
70a30e16 RD |
1049 | |
1050 | if (!dev) | |
1051 | return -ENODEV; | |
bc38a6ab | 1052 | |
036b1063 YH |
1053 | srcu_key = srcu_read_lock(&dev->disassociate_srcu); |
1054 | ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu); | |
1055 | if (ib_dev) | |
1056 | ret = sprintf(buf, "%s\n", ib_dev->name); | |
1057 | srcu_read_unlock(&dev->disassociate_srcu, srcu_key); | |
1058 | ||
1059 | return ret; | |
bc38a6ab | 1060 | } |
f4e91eb4 | 1061 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 1062 | |
f4e91eb4 TJ |
1063 | static ssize_t show_dev_abi_version(struct device *device, |
1064 | struct device_attribute *attr, char *buf) | |
274c0891 | 1065 | { |
f4e91eb4 | 1066 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
036b1063 YH |
1067 | int ret = -ENODEV; |
1068 | int srcu_key; | |
1069 | struct ib_device *ib_dev; | |
70a30e16 RD |
1070 | |
1071 | if (!dev) | |
1072 | return -ENODEV; | |
036b1063 YH |
1073 | srcu_key = srcu_read_lock(&dev->disassociate_srcu); |
1074 | ib_dev = srcu_dereference(dev->ib_dev, &dev->disassociate_srcu); | |
1075 | if (ib_dev) | |
1076 | ret = sprintf(buf, "%d\n", ib_dev->uverbs_abi_ver); | |
1077 | srcu_read_unlock(&dev->disassociate_srcu, srcu_key); | |
274c0891 | 1078 | |
036b1063 | 1079 | return ret; |
274c0891 | 1080 | } |
f4e91eb4 | 1081 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 1082 | |
0933e2d9 AK |
1083 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1084 | __stringify(IB_USER_VERBS_ABI_VERSION)); | |
bc38a6ab | 1085 | |
6d6a0e71 AC |
1086 | static dev_t overflow_maj; |
1087 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); | |
1088 | ||
1089 | /* | |
1090 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by | |
1091 | * requesting a new major number and doubling the number of max devices we | |
1092 | * support. It's stupid, but simple. | |
1093 | */ | |
1094 | static int find_overflow_devnum(void) | |
1095 | { | |
1096 | int ret; | |
1097 | ||
1098 | if (!overflow_maj) { | |
1099 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, | |
1100 | "infiniband_verbs"); | |
1101 | if (ret) { | |
aba25a3e | 1102 | pr_err("user_verbs: couldn't register dynamic device number\n"); |
6d6a0e71 AC |
1103 | return ret; |
1104 | } | |
1105 | } | |
1106 | ||
1107 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); | |
1108 | if (ret >= IB_UVERBS_MAX_DEVICES) | |
1109 | return -1; | |
1110 | ||
1111 | return ret; | |
1112 | } | |
1113 | ||
bc38a6ab RD |
1114 | static void ib_uverbs_add_one(struct ib_device *device) |
1115 | { | |
38707980 | 1116 | int devnum; |
ddbd6883 | 1117 | dev_t base; |
bc38a6ab | 1118 | struct ib_uverbs_device *uverbs_dev; |
036b1063 | 1119 | int ret; |
bc38a6ab RD |
1120 | |
1121 | if (!device->alloc_ucontext) | |
1122 | return; | |
1123 | ||
de6eb66b | 1124 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
1125 | if (!uverbs_dev) |
1126 | return; | |
1127 | ||
036b1063 YH |
1128 | ret = init_srcu_struct(&uverbs_dev->disassociate_srcu); |
1129 | if (ret) { | |
1130 | kfree(uverbs_dev); | |
1131 | return; | |
1132 | } | |
1133 | ||
35d4a0b6 | 1134 | atomic_set(&uverbs_dev->refcount, 1); |
fd60ae40 | 1135 | init_completion(&uverbs_dev->comp); |
53d0bd1e SH |
1136 | uverbs_dev->xrcd_tree = RB_ROOT; |
1137 | mutex_init(&uverbs_dev->xrcd_tree_mutex); | |
35d4a0b6 | 1138 | kobject_init(&uverbs_dev->kobj, &ib_uverbs_dev_ktype); |
036b1063 YH |
1139 | mutex_init(&uverbs_dev->lists_mutex); |
1140 | INIT_LIST_HEAD(&uverbs_dev->uverbs_file_list); | |
1141 | INIT_LIST_HEAD(&uverbs_dev->uverbs_events_file_list); | |
70a30e16 | 1142 | |
bc38a6ab | 1143 | spin_lock(&map_lock); |
38707980 AC |
1144 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
1145 | if (devnum >= IB_UVERBS_MAX_DEVICES) { | |
bc38a6ab | 1146 | spin_unlock(&map_lock); |
6d6a0e71 AC |
1147 | devnum = find_overflow_devnum(); |
1148 | if (devnum < 0) | |
1149 | goto err; | |
1150 | ||
1151 | spin_lock(&map_lock); | |
1152 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; | |
1153 | base = devnum + overflow_maj; | |
1154 | set_bit(devnum, overflow_map); | |
1155 | } else { | |
1156 | uverbs_dev->devnum = devnum; | |
1157 | base = devnum + IB_UVERBS_BASE_DEV; | |
1158 | set_bit(devnum, dev_map); | |
bc38a6ab | 1159 | } |
bc38a6ab RD |
1160 | spin_unlock(&map_lock); |
1161 | ||
036b1063 | 1162 | rcu_assign_pointer(uverbs_dev->ib_dev, device); |
f4fd0b22 | 1163 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 1164 | |
055422dd AC |
1165 | cdev_init(&uverbs_dev->cdev, NULL); |
1166 | uverbs_dev->cdev.owner = THIS_MODULE; | |
1167 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
35d4a0b6 | 1168 | uverbs_dev->cdev.kobj.parent = &uverbs_dev->kobj; |
055422dd | 1169 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); |
ddbd6883 | 1170 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
70a30e16 | 1171 | goto err_cdev; |
bc38a6ab | 1172 | |
91bd418f | 1173 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
055422dd | 1174 | uverbs_dev->cdev.dev, uverbs_dev, |
91bd418f | 1175 | "uverbs%d", uverbs_dev->devnum); |
f4e91eb4 | 1176 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
1177 | goto err_cdev; |
1178 | ||
f4e91eb4 | 1179 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 1180 | goto err_class; |
f4e91eb4 | 1181 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 1182 | goto err_class; |
bc38a6ab RD |
1183 | |
1184 | ib_set_client_data(device, &uverbs_client, uverbs_dev); | |
1185 | ||
1186 | return; | |
1187 | ||
1188 | err_class: | |
055422dd | 1189 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
bc38a6ab RD |
1190 | |
1191 | err_cdev: | |
055422dd | 1192 | cdev_del(&uverbs_dev->cdev); |
6d6a0e71 AC |
1193 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
1194 | clear_bit(devnum, dev_map); | |
1195 | else | |
1196 | clear_bit(devnum, overflow_map); | |
bc38a6ab RD |
1197 | |
1198 | err: | |
35d4a0b6 YH |
1199 | if (atomic_dec_and_test(&uverbs_dev->refcount)) |
1200 | ib_uverbs_comp_dev(uverbs_dev); | |
fd60ae40 | 1201 | wait_for_completion(&uverbs_dev->comp); |
35d4a0b6 | 1202 | kobject_put(&uverbs_dev->kobj); |
bc38a6ab RD |
1203 | return; |
1204 | } | |
1205 | ||
036b1063 YH |
1206 | static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev, |
1207 | struct ib_device *ib_dev) | |
1208 | { | |
1209 | struct ib_uverbs_file *file; | |
1210 | struct ib_uverbs_event_file *event_file; | |
1211 | struct ib_event event; | |
1212 | ||
1213 | /* Pending running commands to terminate */ | |
1214 | synchronize_srcu(&uverbs_dev->disassociate_srcu); | |
1215 | event.event = IB_EVENT_DEVICE_FATAL; | |
1216 | event.element.port_num = 0; | |
1217 | event.device = ib_dev; | |
1218 | ||
1219 | mutex_lock(&uverbs_dev->lists_mutex); | |
1220 | while (!list_empty(&uverbs_dev->uverbs_file_list)) { | |
1221 | struct ib_ucontext *ucontext; | |
1222 | ||
1223 | file = list_first_entry(&uverbs_dev->uverbs_file_list, | |
1224 | struct ib_uverbs_file, list); | |
1225 | file->is_closed = 1; | |
1226 | ucontext = file->ucontext; | |
1227 | list_del(&file->list); | |
1228 | file->ucontext = NULL; | |
1229 | kref_get(&file->ref); | |
1230 | mutex_unlock(&uverbs_dev->lists_mutex); | |
1231 | /* We must release the mutex before going ahead and calling | |
1232 | * disassociate_ucontext. disassociate_ucontext might end up | |
1233 | * indirectly calling uverbs_close, for example due to freeing | |
1234 | * the resources (e.g mmput). | |
1235 | */ | |
1236 | ib_uverbs_event_handler(&file->event_handler, &event); | |
1237 | if (ucontext) { | |
1238 | ib_dev->disassociate_ucontext(ucontext); | |
1239 | ib_uverbs_cleanup_ucontext(file, ucontext); | |
1240 | } | |
1241 | ||
1242 | mutex_lock(&uverbs_dev->lists_mutex); | |
1243 | kref_put(&file->ref, ib_uverbs_release_file); | |
1244 | } | |
1245 | ||
1246 | while (!list_empty(&uverbs_dev->uverbs_events_file_list)) { | |
1247 | event_file = list_first_entry(&uverbs_dev-> | |
1248 | uverbs_events_file_list, | |
1249 | struct ib_uverbs_event_file, | |
1250 | list); | |
1251 | spin_lock_irq(&event_file->lock); | |
1252 | event_file->is_closed = 1; | |
1253 | spin_unlock_irq(&event_file->lock); | |
1254 | ||
1255 | list_del(&event_file->list); | |
1256 | if (event_file->is_async) { | |
1257 | ib_unregister_event_handler(&event_file->uverbs_file-> | |
1258 | event_handler); | |
1259 | event_file->uverbs_file->event_handler.device = NULL; | |
1260 | } | |
1261 | ||
1262 | wake_up_interruptible(&event_file->poll_wait); | |
1263 | kill_fasync(&event_file->async_queue, SIGIO, POLL_IN); | |
1264 | } | |
1265 | mutex_unlock(&uverbs_dev->lists_mutex); | |
1266 | } | |
1267 | ||
7c1eb45a | 1268 | static void ib_uverbs_remove_one(struct ib_device *device, void *client_data) |
bc38a6ab | 1269 | { |
7c1eb45a | 1270 | struct ib_uverbs_device *uverbs_dev = client_data; |
036b1063 | 1271 | int wait_clients = 1; |
bc38a6ab RD |
1272 | |
1273 | if (!uverbs_dev) | |
1274 | return; | |
1275 | ||
f4e91eb4 | 1276 | dev_set_drvdata(uverbs_dev->dev, NULL); |
055422dd AC |
1277 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
1278 | cdev_del(&uverbs_dev->cdev); | |
70a30e16 | 1279 | |
6d6a0e71 AC |
1280 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
1281 | clear_bit(uverbs_dev->devnum, dev_map); | |
1282 | else | |
1283 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); | |
fd60ae40 | 1284 | |
036b1063 YH |
1285 | if (device->disassociate_ucontext) { |
1286 | /* We disassociate HW resources and immediately return. | |
1287 | * Userspace will see a EIO errno for all future access. | |
1288 | * Upon returning, ib_device may be freed internally and is not | |
1289 | * valid any more. | |
1290 | * uverbs_device is still available until all clients close | |
1291 | * their files, then the uverbs device ref count will be zero | |
1292 | * and its resources will be freed. | |
1293 | * Note: At this point no more files can be opened since the | |
1294 | * cdev was deleted, however active clients can still issue | |
1295 | * commands and close their open files. | |
1296 | */ | |
1297 | rcu_assign_pointer(uverbs_dev->ib_dev, NULL); | |
1298 | ib_uverbs_free_hw_resources(uverbs_dev, device); | |
1299 | wait_clients = 0; | |
1300 | } | |
1301 | ||
35d4a0b6 YH |
1302 | if (atomic_dec_and_test(&uverbs_dev->refcount)) |
1303 | ib_uverbs_comp_dev(uverbs_dev); | |
036b1063 YH |
1304 | if (wait_clients) |
1305 | wait_for_completion(&uverbs_dev->comp); | |
35d4a0b6 | 1306 | kobject_put(&uverbs_dev->kobj); |
bc38a6ab RD |
1307 | } |
1308 | ||
2c9ede55 | 1309 | static char *uverbs_devnode(struct device *dev, umode_t *mode) |
71c29bd5 | 1310 | { |
b2bc4782 GR |
1311 | if (mode) |
1312 | *mode = 0666; | |
71c29bd5 RD |
1313 | return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
1314 | } | |
1315 | ||
bc38a6ab RD |
1316 | static int __init ib_uverbs_init(void) |
1317 | { | |
1318 | int ret; | |
1319 | ||
bc38a6ab RD |
1320 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
1321 | "infiniband_verbs"); | |
1322 | if (ret) { | |
aba25a3e | 1323 | pr_err("user_verbs: couldn't register device number\n"); |
bc38a6ab RD |
1324 | goto out; |
1325 | } | |
1326 | ||
70a30e16 RD |
1327 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
1328 | if (IS_ERR(uverbs_class)) { | |
1329 | ret = PTR_ERR(uverbs_class); | |
aba25a3e | 1330 | pr_err("user_verbs: couldn't create class infiniband_verbs\n"); |
bc38a6ab RD |
1331 | goto out_chrdev; |
1332 | } | |
1333 | ||
71c29bd5 RD |
1334 | uverbs_class->devnode = uverbs_devnode; |
1335 | ||
0933e2d9 | 1336 | ret = class_create_file(uverbs_class, &class_attr_abi_version.attr); |
bc38a6ab | 1337 | if (ret) { |
aba25a3e | 1338 | pr_err("user_verbs: couldn't create abi_version attribute\n"); |
bc38a6ab RD |
1339 | goto out_class; |
1340 | } | |
1341 | ||
bc38a6ab RD |
1342 | ret = ib_register_client(&uverbs_client); |
1343 | if (ret) { | |
aba25a3e | 1344 | pr_err("user_verbs: couldn't register client\n"); |
a265e558 | 1345 | goto out_class; |
bc38a6ab RD |
1346 | } |
1347 | ||
1348 | return 0; | |
1349 | ||
bc38a6ab | 1350 | out_class: |
70a30e16 | 1351 | class_destroy(uverbs_class); |
bc38a6ab RD |
1352 | |
1353 | out_chrdev: | |
1354 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
1355 | ||
1356 | out: | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | static void __exit ib_uverbs_cleanup(void) | |
1361 | { | |
1362 | ib_unregister_client(&uverbs_client); | |
70a30e16 | 1363 | class_destroy(uverbs_class); |
bc38a6ab | 1364 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
6d6a0e71 AC |
1365 | if (overflow_maj) |
1366 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); | |
5d7edb3c RD |
1367 | idr_destroy(&ib_uverbs_pd_idr); |
1368 | idr_destroy(&ib_uverbs_mr_idr); | |
1369 | idr_destroy(&ib_uverbs_mw_idr); | |
1370 | idr_destroy(&ib_uverbs_ah_idr); | |
1371 | idr_destroy(&ib_uverbs_cq_idr); | |
1372 | idr_destroy(&ib_uverbs_qp_idr); | |
1373 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
1374 | } |
1375 | ||
1376 | module_init(ib_uverbs_init); | |
1377 | module_exit(ib_uverbs_cleanup); |