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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 RD |
44 | #include <linux/file.h> |
45 | #include <linux/mount.h> | |
70a30e16 | 46 | #include <linux/cdev.h> |
bc38a6ab RD |
47 | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include "uverbs.h" | |
51 | ||
52 | MODULE_AUTHOR("Roland Dreier"); | |
53 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
56 | #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */ | |
57 | ||
58 | enum { | |
59 | IB_UVERBS_MAJOR = 231, | |
60 | IB_UVERBS_BASE_MINOR = 192, | |
61 | IB_UVERBS_MAX_DEVICES = 32 | |
62 | }; | |
63 | ||
64 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) | |
65 | ||
70a30e16 RD |
66 | static struct class *uverbs_class; |
67 | ||
9ead190b | 68 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
69 | DEFINE_IDR(ib_uverbs_pd_idr); |
70 | DEFINE_IDR(ib_uverbs_mr_idr); | |
71 | DEFINE_IDR(ib_uverbs_mw_idr); | |
72 | DEFINE_IDR(ib_uverbs_ah_idr); | |
73 | DEFINE_IDR(ib_uverbs_cq_idr); | |
74 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 75 | DEFINE_IDR(ib_uverbs_srq_idr); |
bc38a6ab | 76 | |
6276e08a | 77 | static DEFINE_SPINLOCK(map_lock); |
70a30e16 | 78 | static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES]; |
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) = { | |
6b73597e RD |
84 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
85 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
86 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
87 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
88 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
89 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
90 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, | |
91 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, | |
92 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, | |
33b9b3ee | 93 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, |
67cdb40c RD |
94 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, |
95 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
6b73597e RD |
96 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, |
97 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
7ccc9a24 | 98 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, |
6b73597e RD |
99 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, |
100 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
67cdb40c RD |
101 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, |
102 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
103 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
104 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
105 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
6b73597e RD |
106 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, |
107 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
108 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
109 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
8bdb0e86 | 110 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, |
6b73597e | 111 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, |
bc38a6ab RD |
112 | }; |
113 | ||
114 | static struct vfsmount *uverbs_event_mnt; | |
115 | ||
116 | static void ib_uverbs_add_one(struct ib_device *device); | |
117 | static void ib_uverbs_remove_one(struct ib_device *device); | |
118 | ||
70a30e16 RD |
119 | static void ib_uverbs_release_dev(struct kref *ref) |
120 | { | |
121 | struct ib_uverbs_device *dev = | |
122 | container_of(ref, struct ib_uverbs_device, ref); | |
123 | ||
fd60ae40 | 124 | complete(&dev->comp); |
70a30e16 RD |
125 | } |
126 | ||
04d29b0e RD |
127 | static void ib_uverbs_release_event_file(struct kref *ref) |
128 | { | |
129 | struct ib_uverbs_event_file *file = | |
130 | container_of(ref, struct ib_uverbs_event_file, ref); | |
131 | ||
132 | kfree(file); | |
133 | } | |
134 | ||
70a30e16 RD |
135 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
136 | struct ib_uverbs_event_file *ev_file, | |
137 | struct ib_ucq_object *uobj) | |
138 | { | |
139 | struct ib_uverbs_event *evt, *tmp; | |
140 | ||
141 | if (ev_file) { | |
142 | spin_lock_irq(&ev_file->lock); | |
143 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
144 | list_del(&evt->list); | |
145 | kfree(evt); | |
146 | } | |
147 | spin_unlock_irq(&ev_file->lock); | |
148 | ||
149 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
150 | } | |
151 | ||
152 | spin_lock_irq(&file->async_file->lock); | |
153 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
154 | list_del(&evt->list); | |
155 | kfree(evt); | |
156 | } | |
157 | spin_unlock_irq(&file->async_file->lock); | |
158 | } | |
159 | ||
160 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
161 | struct ib_uevent_object *uobj) | |
162 | { | |
163 | struct ib_uverbs_event *evt, *tmp; | |
164 | ||
165 | spin_lock_irq(&file->async_file->lock); | |
166 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
167 | list_del(&evt->list); | |
168 | kfree(evt); | |
169 | } | |
170 | spin_unlock_irq(&file->async_file->lock); | |
171 | } | |
172 | ||
f4e40156 JM |
173 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
174 | struct ib_uqp_object *uobj) | |
175 | { | |
176 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
177 | ||
178 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
179 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
180 | list_del(&mcast->list); | |
181 | kfree(mcast); | |
182 | } | |
183 | } | |
184 | ||
70a30e16 RD |
185 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
186 | struct ib_ucontext *context) | |
bc38a6ab RD |
187 | { |
188 | struct ib_uobject *uobj, *tmp; | |
189 | ||
190 | if (!context) | |
191 | return 0; | |
192 | ||
f7c6a7b5 RD |
193 | context->closing = 1; |
194 | ||
67cdb40c | 195 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
196 | struct ib_ah *ah = uobj->object; |
197 | ||
198 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 199 | ib_destroy_ah(ah); |
67cdb40c RD |
200 | kfree(uobj); |
201 | } | |
bc38a6ab RD |
202 | |
203 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { | |
9ead190b | 204 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
205 | struct ib_uqp_object *uqp = |
206 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
207 | |
208 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
f4e40156 | 209 | ib_uverbs_detach_umcast(qp, uqp); |
bc38a6ab | 210 | ib_destroy_qp(qp); |
f4e40156 JM |
211 | ib_uverbs_release_uevent(file, &uqp->uevent); |
212 | kfree(uqp); | |
bc38a6ab RD |
213 | } |
214 | ||
215 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 216 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
217 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
218 | struct ib_ucq_object *ucq = | |
219 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
220 | |
221 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 222 | ib_destroy_cq(cq); |
70a30e16 RD |
223 | ib_uverbs_release_ucq(file, ev_file, ucq); |
224 | kfree(ucq); | |
bc38a6ab RD |
225 | } |
226 | ||
f520ba5a | 227 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 228 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
229 | struct ib_uevent_object *uevent = |
230 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
231 | |
232 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 233 | ib_destroy_srq(srq); |
70a30e16 RD |
234 | ib_uverbs_release_uevent(file, uevent); |
235 | kfree(uevent); | |
f520ba5a RD |
236 | } |
237 | ||
bc38a6ab RD |
238 | /* XXX Free MWs */ |
239 | ||
240 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { | |
9ead190b | 241 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 242 | |
9ead190b | 243 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 244 | ib_dereg_mr(mr); |
f7c6a7b5 | 245 | kfree(uobj); |
bc38a6ab RD |
246 | } |
247 | ||
248 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { | |
9ead190b RD |
249 | struct ib_pd *pd = uobj->object; |
250 | ||
251 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 252 | ib_dealloc_pd(pd); |
bc38a6ab RD |
253 | kfree(uobj); |
254 | } | |
255 | ||
bc38a6ab RD |
256 | return context->device->dealloc_ucontext(context); |
257 | } | |
258 | ||
259 | static void ib_uverbs_release_file(struct kref *ref) | |
260 | { | |
261 | struct ib_uverbs_file *file = | |
262 | container_of(ref, struct ib_uverbs_file, ref); | |
263 | ||
264 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
265 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
266 | ||
bc38a6ab RD |
267 | kfree(file); |
268 | } | |
269 | ||
270 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
271 | size_t count, loff_t *pos) | |
272 | { | |
273 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 274 | struct ib_uverbs_event *event; |
bc38a6ab RD |
275 | int eventsz; |
276 | int ret = 0; | |
277 | ||
278 | spin_lock_irq(&file->lock); | |
279 | ||
6b73597e | 280 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
281 | spin_unlock_irq(&file->lock); |
282 | ||
283 | if (filp->f_flags & O_NONBLOCK) | |
284 | return -EAGAIN; | |
285 | ||
286 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 287 | !list_empty(&file->event_list))) |
bc38a6ab RD |
288 | return -ERESTARTSYS; |
289 | ||
290 | spin_lock_irq(&file->lock); | |
291 | } | |
292 | ||
63aaf647 RD |
293 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
294 | ||
295 | if (file->is_async) | |
bc38a6ab | 296 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 297 | else |
bc38a6ab | 298 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
299 | |
300 | if (eventsz > count) { | |
301 | ret = -EINVAL; | |
302 | event = NULL; | |
63aaf647 | 303 | } else { |
bc38a6ab | 304 | list_del(file->event_list.next); |
63aaf647 RD |
305 | if (event->counter) { |
306 | ++(*event->counter); | |
307 | list_del(&event->obj_list); | |
308 | } | |
309 | } | |
bc38a6ab RD |
310 | |
311 | spin_unlock_irq(&file->lock); | |
312 | ||
313 | if (event) { | |
314 | if (copy_to_user(buf, event, eventsz)) | |
315 | ret = -EFAULT; | |
316 | else | |
317 | ret = eventsz; | |
318 | } | |
319 | ||
320 | kfree(event); | |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
325 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
326 | struct poll_table_struct *wait) | |
327 | { | |
328 | unsigned int pollflags = 0; | |
329 | struct ib_uverbs_event_file *file = filp->private_data; | |
330 | ||
331 | poll_wait(filp, &file->poll_wait, wait); | |
332 | ||
333 | spin_lock_irq(&file->lock); | |
6b73597e | 334 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
335 | pollflags = POLLIN | POLLRDNORM; |
336 | spin_unlock_irq(&file->lock); | |
337 | ||
338 | return pollflags; | |
339 | } | |
340 | ||
abdf119b GN |
341 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
342 | { | |
343 | struct ib_uverbs_event_file *file = filp->private_data; | |
344 | ||
345 | return fasync_helper(fd, filp, on, &file->async_queue); | |
346 | } | |
347 | ||
bc38a6ab RD |
348 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
349 | { | |
350 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
351 | struct ib_uverbs_event *entry, *tmp; |
352 | ||
353 | spin_lock_irq(&file->lock); | |
1ae5c187 | 354 | file->is_closed = 1; |
6b73597e RD |
355 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
356 | if (entry->counter) | |
357 | list_del(&entry->obj_list); | |
358 | kfree(entry); | |
359 | } | |
360 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 361 | |
6b73597e RD |
362 | if (file->is_async) { |
363 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
364 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
365 | } | |
366 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
367 | |
368 | return 0; | |
369 | } | |
370 | ||
2b8693c0 | 371 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 372 | .owner = THIS_MODULE, |
bc38a6ab RD |
373 | .read = ib_uverbs_event_read, |
374 | .poll = ib_uverbs_event_poll, | |
abdf119b GN |
375 | .release = ib_uverbs_event_close, |
376 | .fasync = ib_uverbs_event_fasync | |
bc38a6ab RD |
377 | }; |
378 | ||
379 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
380 | { | |
6b73597e RD |
381 | struct ib_uverbs_event_file *file = cq_context; |
382 | struct ib_ucq_object *uobj; | |
383 | struct ib_uverbs_event *entry; | |
384 | unsigned long flags; | |
385 | ||
386 | if (!file) | |
387 | return; | |
388 | ||
389 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 390 | if (file->is_closed) { |
6b73597e RD |
391 | spin_unlock_irqrestore(&file->lock, flags); |
392 | return; | |
393 | } | |
bc38a6ab RD |
394 | |
395 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
396 | if (!entry) { |
397 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 398 | return; |
305a7e87 | 399 | } |
bc38a6ab | 400 | |
63aaf647 RD |
401 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
402 | ||
403 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
404 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 405 | |
6b73597e | 406 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 407 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 408 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 409 | |
6b73597e RD |
410 | wake_up_interruptible(&file->poll_wait); |
411 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
412 | } |
413 | ||
414 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
415 | __u64 element, __u64 event, |
416 | struct list_head *obj_list, | |
417 | u32 *counter) | |
bc38a6ab | 418 | { |
63aaf647 | 419 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
420 | unsigned long flags; |
421 | ||
6b73597e | 422 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 423 | if (file->async_file->is_closed) { |
6b73597e RD |
424 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
425 | return; | |
426 | } | |
427 | ||
bc38a6ab | 428 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
429 | if (!entry) { |
430 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 431 | return; |
305a7e87 | 432 | } |
bc38a6ab | 433 | |
63aaf647 RD |
434 | entry->desc.async.element = element; |
435 | entry->desc.async.event_type = event; | |
436 | entry->counter = counter; | |
bc38a6ab | 437 | |
6b73597e | 438 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
439 | if (obj_list) |
440 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 441 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 442 | |
6b73597e RD |
443 | wake_up_interruptible(&file->async_file->poll_wait); |
444 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
445 | } |
446 | ||
447 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
448 | { | |
7162a3e0 RD |
449 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
450 | struct ib_ucq_object, uobject); | |
63aaf647 | 451 | |
7162a3e0 | 452 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
453 | event->event, &uobj->async_list, |
454 | &uobj->async_events_reported); | |
bc38a6ab RD |
455 | } |
456 | ||
457 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
458 | { | |
63aaf647 RD |
459 | struct ib_uevent_object *uobj; |
460 | ||
461 | uobj = container_of(event->element.qp->uobject, | |
462 | struct ib_uevent_object, uobject); | |
463 | ||
464 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
465 | event->event, &uobj->event_list, | |
466 | &uobj->events_reported); | |
bc38a6ab RD |
467 | } |
468 | ||
f520ba5a RD |
469 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
470 | { | |
63aaf647 RD |
471 | struct ib_uevent_object *uobj; |
472 | ||
473 | uobj = container_of(event->element.srq->uobject, | |
474 | struct ib_uevent_object, uobject); | |
475 | ||
476 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
477 | event->event, &uobj->event_list, | |
478 | &uobj->events_reported); | |
f520ba5a RD |
479 | } |
480 | ||
6b73597e RD |
481 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
482 | struct ib_event *event) | |
bc38a6ab RD |
483 | { |
484 | struct ib_uverbs_file *file = | |
485 | container_of(handler, struct ib_uverbs_file, event_handler); | |
486 | ||
63aaf647 RD |
487 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
488 | NULL, NULL); | |
bc38a6ab RD |
489 | } |
490 | ||
6b73597e RD |
491 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
492 | int is_async, int *fd) | |
bc38a6ab | 493 | { |
6b73597e | 494 | struct ib_uverbs_event_file *ev_file; |
2c48b9c4 | 495 | struct path path; |
bc38a6ab | 496 | struct file *filp; |
6b73597e | 497 | int ret; |
bc38a6ab | 498 | |
6b73597e RD |
499 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
500 | if (!ev_file) | |
501 | return ERR_PTR(-ENOMEM); | |
502 | ||
503 | kref_init(&ev_file->ref); | |
504 | spin_lock_init(&ev_file->lock); | |
505 | INIT_LIST_HEAD(&ev_file->event_list); | |
506 | init_waitqueue_head(&ev_file->poll_wait); | |
507 | ev_file->uverbs_file = uverbs_file; | |
508 | ev_file->async_queue = NULL; | |
509 | ev_file->is_async = is_async; | |
1ae5c187 | 510 | ev_file->is_closed = 0; |
6b73597e RD |
511 | |
512 | *fd = get_unused_fd(); | |
513 | if (*fd < 0) { | |
514 | ret = *fd; | |
515 | goto err; | |
516 | } | |
bc38a6ab | 517 | |
6b73597e RD |
518 | /* |
519 | * fops_get() can't fail here, because we're coming from a | |
520 | * system call on a uverbs file, which will already have a | |
521 | * module reference. | |
522 | */ | |
2c48b9c4 AV |
523 | path.mnt = uverbs_event_mnt; |
524 | path.dentry = uverbs_event_mnt->mnt_root; | |
525 | path_get(&path); | |
526 | filp = alloc_file(&path, FMODE_READ, fops_get(&uverbs_event_fops)); | |
a7dab9e8 RD |
527 | if (!filp) { |
528 | ret = -ENFILE; | |
529 | goto err_fd; | |
530 | } | |
531 | ||
6b73597e | 532 | filp->private_data = ev_file; |
bc38a6ab | 533 | |
6b73597e | 534 | return filp; |
bc38a6ab | 535 | |
6b73597e | 536 | err_fd: |
2c48b9c4 AV |
537 | fops_put(&uverbs_event_fops); |
538 | path_put(&path); | |
6b73597e RD |
539 | put_unused_fd(*fd); |
540 | ||
541 | err: | |
542 | kfree(ev_file); | |
543 | return ERR_PTR(ret); | |
544 | } | |
545 | ||
546 | /* | |
547 | * Look up a completion event file by FD. If lookup is successful, | |
548 | * takes a ref to the event file struct that it returns; if | |
549 | * unsuccessful, returns NULL. | |
550 | */ | |
551 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
552 | { | |
553 | struct ib_uverbs_event_file *ev_file = NULL; | |
554 | struct file *filp; | |
555 | ||
556 | filp = fget(fd); | |
557 | if (!filp) | |
558 | return NULL; | |
559 | ||
560 | if (filp->f_op != &uverbs_event_fops) | |
561 | goto out; | |
562 | ||
563 | ev_file = filp->private_data; | |
564 | if (ev_file->is_async) { | |
565 | ev_file = NULL; | |
566 | goto out; | |
567 | } | |
568 | ||
569 | kref_get(&ev_file->ref); | |
570 | ||
571 | out: | |
572 | fput(filp); | |
573 | return ev_file; | |
bc38a6ab RD |
574 | } |
575 | ||
576 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
577 | size_t count, loff_t *pos) | |
578 | { | |
579 | struct ib_uverbs_file *file = filp->private_data; | |
580 | struct ib_uverbs_cmd_hdr hdr; | |
581 | ||
582 | if (count < sizeof hdr) | |
583 | return -EINVAL; | |
584 | ||
585 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
586 | return -EFAULT; | |
587 | ||
588 | if (hdr.in_words * 4 != count) | |
589 | return -EINVAL; | |
590 | ||
63c47c28 RD |
591 | if (hdr.command < 0 || |
592 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || | |
b1b8afb8 | 593 | !uverbs_cmd_table[hdr.command]) |
bc38a6ab RD |
594 | return -EINVAL; |
595 | ||
6b73597e | 596 | if (!file->ucontext && |
bc38a6ab RD |
597 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
598 | return -EINVAL; | |
599 | ||
b1b8afb8 JM |
600 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) |
601 | return -ENOSYS; | |
602 | ||
bc38a6ab RD |
603 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, |
604 | hdr.in_words * 4, hdr.out_words * 4); | |
605 | } | |
606 | ||
607 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
608 | { | |
609 | struct ib_uverbs_file *file = filp->private_data; | |
610 | ||
611 | if (!file->ucontext) | |
612 | return -ENODEV; | |
613 | else | |
614 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
615 | } | |
616 | ||
5b2d281a RD |
617 | /* |
618 | * ib_uverbs_open() does not need the BKL: | |
619 | * | |
620 | * - dev_table[] accesses are protected by map_lock, the | |
621 | * ib_uverbs_device structures are properly reference counted, and | |
622 | * everything else is purely local to the file being created, so | |
623 | * races against other open calls are not a problem; | |
624 | * - there is no ioctl method to race against; | |
625 | * - the device is added to dev_table[] as the last part of module | |
626 | * initialization, the open method will either immediately run | |
627 | * -ENXIO, or all required initialization will be done. | |
628 | */ | |
bc38a6ab RD |
629 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
630 | { | |
70a30e16 | 631 | struct ib_uverbs_device *dev; |
bc38a6ab | 632 | struct ib_uverbs_file *file; |
70a30e16 | 633 | int ret; |
bc38a6ab | 634 | |
70a30e16 RD |
635 | spin_lock(&map_lock); |
636 | dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR]; | |
637 | if (dev) | |
638 | kref_get(&dev->ref); | |
639 | spin_unlock(&map_lock); | |
640 | ||
5b2d281a | 641 | if (!dev) |
70a30e16 RD |
642 | return -ENXIO; |
643 | ||
644 | if (!try_module_get(dev->ib_dev->owner)) { | |
645 | ret = -ENODEV; | |
646 | goto err; | |
647 | } | |
bc38a6ab | 648 | |
6b73597e | 649 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 650 | if (!file) { |
70a30e16 RD |
651 | ret = -ENOMEM; |
652 | goto err_module; | |
63c47c28 | 653 | } |
bc38a6ab | 654 | |
70a30e16 RD |
655 | file->device = dev; |
656 | file->ucontext = NULL; | |
657 | file->async_file = NULL; | |
bc38a6ab | 658 | kref_init(&file->ref); |
95ed644f | 659 | mutex_init(&file->mutex); |
bc38a6ab | 660 | |
bc38a6ab RD |
661 | filp->private_data = file; |
662 | ||
bc38a6ab | 663 | return 0; |
70a30e16 RD |
664 | |
665 | err_module: | |
666 | module_put(dev->ib_dev->owner); | |
667 | ||
668 | err: | |
669 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 670 | return ret; |
bc38a6ab RD |
671 | } |
672 | ||
673 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
674 | { | |
675 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 676 | |
70a30e16 RD |
677 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
678 | ||
679 | if (file->async_file) | |
680 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 681 | |
bc38a6ab RD |
682 | kref_put(&file->ref, ib_uverbs_release_file); |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
2b8693c0 | 687 | static const struct file_operations uverbs_fops = { |
bc38a6ab RD |
688 | .owner = THIS_MODULE, |
689 | .write = ib_uverbs_write, | |
690 | .open = ib_uverbs_open, | |
691 | .release = ib_uverbs_close | |
692 | }; | |
693 | ||
2b8693c0 | 694 | static const struct file_operations uverbs_mmap_fops = { |
bc38a6ab RD |
695 | .owner = THIS_MODULE, |
696 | .write = ib_uverbs_write, | |
697 | .mmap = ib_uverbs_mmap, | |
698 | .open = ib_uverbs_open, | |
699 | .release = ib_uverbs_close | |
700 | }; | |
701 | ||
702 | static struct ib_client uverbs_client = { | |
703 | .name = "uverbs", | |
704 | .add = ib_uverbs_add_one, | |
705 | .remove = ib_uverbs_remove_one | |
706 | }; | |
707 | ||
f4e91eb4 TJ |
708 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
709 | char *buf) | |
bc38a6ab | 710 | { |
f4e91eb4 | 711 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
712 | |
713 | if (!dev) | |
714 | return -ENODEV; | |
bc38a6ab RD |
715 | |
716 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
717 | } | |
f4e91eb4 | 718 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 719 | |
f4e91eb4 TJ |
720 | static ssize_t show_dev_abi_version(struct device *device, |
721 | struct device_attribute *attr, char *buf) | |
274c0891 | 722 | { |
f4e91eb4 | 723 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
724 | |
725 | if (!dev) | |
726 | return -ENODEV; | |
274c0891 RD |
727 | |
728 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
729 | } | |
f4e91eb4 | 730 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 731 | |
bc38a6ab RD |
732 | static ssize_t show_abi_version(struct class *class, char *buf) |
733 | { | |
734 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); | |
735 | } | |
736 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
737 | ||
738 | static void ib_uverbs_add_one(struct ib_device *device) | |
739 | { | |
740 | struct ib_uverbs_device *uverbs_dev; | |
741 | ||
742 | if (!device->alloc_ucontext) | |
743 | return; | |
744 | ||
de6eb66b | 745 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
746 | if (!uverbs_dev) |
747 | return; | |
748 | ||
70a30e16 | 749 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 750 | init_completion(&uverbs_dev->comp); |
70a30e16 | 751 | |
bc38a6ab RD |
752 | spin_lock(&map_lock); |
753 | uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); | |
754 | if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { | |
755 | spin_unlock(&map_lock); | |
756 | goto err; | |
757 | } | |
758 | set_bit(uverbs_dev->devnum, dev_map); | |
759 | spin_unlock(&map_lock); | |
760 | ||
6b73597e | 761 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 762 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 763 | |
f4e91eb4 TJ |
764 | uverbs_dev->cdev = cdev_alloc(); |
765 | if (!uverbs_dev->cdev) | |
bc38a6ab | 766 | goto err; |
f4e91eb4 TJ |
767 | uverbs_dev->cdev->owner = THIS_MODULE; |
768 | uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
769 | kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum); | |
770 | if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) | |
70a30e16 | 771 | goto err_cdev; |
bc38a6ab | 772 | |
91bd418f GKH |
773 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
774 | uverbs_dev->cdev->dev, uverbs_dev, | |
775 | "uverbs%d", uverbs_dev->devnum); | |
f4e91eb4 | 776 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
777 | goto err_cdev; |
778 | ||
f4e91eb4 | 779 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 780 | goto err_class; |
f4e91eb4 | 781 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 782 | goto err_class; |
bc38a6ab | 783 | |
70a30e16 RD |
784 | spin_lock(&map_lock); |
785 | dev_table[uverbs_dev->devnum] = uverbs_dev; | |
786 | spin_unlock(&map_lock); | |
787 | ||
bc38a6ab RD |
788 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
789 | ||
790 | return; | |
791 | ||
792 | err_class: | |
f4e91eb4 | 793 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); |
bc38a6ab RD |
794 | |
795 | err_cdev: | |
f4e91eb4 | 796 | cdev_del(uverbs_dev->cdev); |
bc38a6ab RD |
797 | clear_bit(uverbs_dev->devnum, dev_map); |
798 | ||
799 | err: | |
70a30e16 | 800 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
801 | wait_for_completion(&uverbs_dev->comp); |
802 | kfree(uverbs_dev); | |
bc38a6ab RD |
803 | return; |
804 | } | |
805 | ||
806 | static void ib_uverbs_remove_one(struct ib_device *device) | |
807 | { | |
808 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
809 | ||
810 | if (!uverbs_dev) | |
811 | return; | |
812 | ||
f4e91eb4 TJ |
813 | dev_set_drvdata(uverbs_dev->dev, NULL); |
814 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); | |
815 | cdev_del(uverbs_dev->cdev); | |
70a30e16 RD |
816 | |
817 | spin_lock(&map_lock); | |
818 | dev_table[uverbs_dev->devnum] = NULL; | |
819 | spin_unlock(&map_lock); | |
820 | ||
821 | clear_bit(uverbs_dev->devnum, dev_map); | |
fd60ae40 | 822 | |
70a30e16 | 823 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
824 | wait_for_completion(&uverbs_dev->comp); |
825 | kfree(uverbs_dev); | |
bc38a6ab RD |
826 | } |
827 | ||
454e2398 DH |
828 | static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags, |
829 | const char *dev_name, void *data, | |
830 | struct vfsmount *mnt) | |
bc38a6ab RD |
831 | { |
832 | return get_sb_pseudo(fs_type, "infinibandevent:", NULL, | |
454e2398 | 833 | INFINIBANDEVENTFS_MAGIC, mnt); |
bc38a6ab RD |
834 | } |
835 | ||
836 | static struct file_system_type uverbs_event_fs = { | |
837 | /* No owner field so module can be unloaded */ | |
838 | .name = "infinibandeventfs", | |
839 | .get_sb = uverbs_event_get_sb, | |
840 | .kill_sb = kill_litter_super | |
841 | }; | |
842 | ||
843 | static int __init ib_uverbs_init(void) | |
844 | { | |
845 | int ret; | |
846 | ||
bc38a6ab RD |
847 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
848 | "infiniband_verbs"); | |
849 | if (ret) { | |
850 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
851 | goto out; | |
852 | } | |
853 | ||
70a30e16 RD |
854 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
855 | if (IS_ERR(uverbs_class)) { | |
856 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
857 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
858 | goto out_chrdev; | |
859 | } | |
860 | ||
70a30e16 | 861 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
bc38a6ab RD |
862 | if (ret) { |
863 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
864 | goto out_class; | |
865 | } | |
866 | ||
867 | ret = register_filesystem(&uverbs_event_fs); | |
868 | if (ret) { | |
869 | printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n"); | |
870 | goto out_class; | |
871 | } | |
872 | ||
873 | uverbs_event_mnt = kern_mount(&uverbs_event_fs); | |
874 | if (IS_ERR(uverbs_event_mnt)) { | |
875 | ret = PTR_ERR(uverbs_event_mnt); | |
876 | printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n"); | |
877 | goto out_fs; | |
878 | } | |
879 | ||
880 | ret = ib_register_client(&uverbs_client); | |
881 | if (ret) { | |
882 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
883 | goto out_mnt; | |
884 | } | |
885 | ||
886 | return 0; | |
887 | ||
888 | out_mnt: | |
889 | mntput(uverbs_event_mnt); | |
890 | ||
891 | out_fs: | |
892 | unregister_filesystem(&uverbs_event_fs); | |
893 | ||
894 | out_class: | |
70a30e16 | 895 | class_destroy(uverbs_class); |
bc38a6ab RD |
896 | |
897 | out_chrdev: | |
898 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
899 | ||
900 | out: | |
901 | return ret; | |
902 | } | |
903 | ||
904 | static void __exit ib_uverbs_cleanup(void) | |
905 | { | |
906 | ib_unregister_client(&uverbs_client); | |
907 | mntput(uverbs_event_mnt); | |
908 | unregister_filesystem(&uverbs_event_fs); | |
70a30e16 | 909 | class_destroy(uverbs_class); |
bc38a6ab | 910 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
5d7edb3c RD |
911 | idr_destroy(&ib_uverbs_pd_idr); |
912 | idr_destroy(&ib_uverbs_mr_idr); | |
913 | idr_destroy(&ib_uverbs_mw_idr); | |
914 | idr_destroy(&ib_uverbs_ah_idr); | |
915 | idr_destroy(&ib_uverbs_cq_idr); | |
916 | idr_destroy(&ib_uverbs_qp_idr); | |
917 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
918 | } |
919 | ||
920 | module_init(ib_uverbs_init); | |
921 | module_exit(ib_uverbs_cleanup); |