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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. | |
35 | * | |
36 | * $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $ | |
37 | */ | |
38 | ||
39 | #include <linux/module.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/device.h> | |
42 | #include <linux/err.h> | |
43 | #include <linux/fs.h> | |
44 | #include <linux/poll.h> | |
45 | #include <linux/file.h> | |
46 | #include <linux/mount.h> | |
70a30e16 | 47 | #include <linux/cdev.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 | ||
57 | #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */ | |
58 | ||
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); |
bc38a6ab RD |
77 | |
78 | static spinlock_t map_lock; | |
70a30e16 | 79 | static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES]; |
bc38a6ab RD |
80 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
81 | ||
82 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
83 | const char __user *buf, int in_len, | |
84 | int out_len) = { | |
6b73597e RD |
85 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
86 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
87 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
88 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
89 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
90 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
91 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, | |
92 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, | |
93 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, | |
33b9b3ee | 94 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, |
67cdb40c RD |
95 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, |
96 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
6b73597e RD |
97 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, |
98 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
7ccc9a24 | 99 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, |
6b73597e RD |
100 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, |
101 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
67cdb40c RD |
102 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, |
103 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
104 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
105 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
106 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
6b73597e RD |
107 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, |
108 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
109 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
110 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
8bdb0e86 | 111 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, |
6b73597e | 112 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, |
bc38a6ab RD |
113 | }; |
114 | ||
115 | static struct vfsmount *uverbs_event_mnt; | |
116 | ||
117 | static void ib_uverbs_add_one(struct ib_device *device); | |
118 | static void ib_uverbs_remove_one(struct ib_device *device); | |
119 | ||
70a30e16 RD |
120 | static void ib_uverbs_release_dev(struct kref *ref) |
121 | { | |
122 | struct ib_uverbs_device *dev = | |
123 | container_of(ref, struct ib_uverbs_device, ref); | |
124 | ||
fd60ae40 | 125 | complete(&dev->comp); |
70a30e16 RD |
126 | } |
127 | ||
04d29b0e RD |
128 | static void ib_uverbs_release_event_file(struct kref *ref) |
129 | { | |
130 | struct ib_uverbs_event_file *file = | |
131 | container_of(ref, struct ib_uverbs_event_file, ref); | |
132 | ||
133 | kfree(file); | |
134 | } | |
135 | ||
70a30e16 RD |
136 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
137 | struct ib_uverbs_event_file *ev_file, | |
138 | struct ib_ucq_object *uobj) | |
139 | { | |
140 | struct ib_uverbs_event *evt, *tmp; | |
141 | ||
142 | if (ev_file) { | |
143 | spin_lock_irq(&ev_file->lock); | |
144 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
145 | list_del(&evt->list); | |
146 | kfree(evt); | |
147 | } | |
148 | spin_unlock_irq(&ev_file->lock); | |
149 | ||
150 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
151 | } | |
152 | ||
153 | spin_lock_irq(&file->async_file->lock); | |
154 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
155 | list_del(&evt->list); | |
156 | kfree(evt); | |
157 | } | |
158 | spin_unlock_irq(&file->async_file->lock); | |
159 | } | |
160 | ||
161 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
162 | struct ib_uevent_object *uobj) | |
163 | { | |
164 | struct ib_uverbs_event *evt, *tmp; | |
165 | ||
166 | spin_lock_irq(&file->async_file->lock); | |
167 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
168 | list_del(&evt->list); | |
169 | kfree(evt); | |
170 | } | |
171 | spin_unlock_irq(&file->async_file->lock); | |
172 | } | |
173 | ||
f4e40156 JM |
174 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
175 | struct ib_uqp_object *uobj) | |
176 | { | |
177 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
178 | ||
179 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
180 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
181 | list_del(&mcast->list); | |
182 | kfree(mcast); | |
183 | } | |
184 | } | |
185 | ||
70a30e16 RD |
186 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
187 | struct ib_ucontext *context) | |
bc38a6ab RD |
188 | { |
189 | struct ib_uobject *uobj, *tmp; | |
190 | ||
191 | if (!context) | |
192 | return 0; | |
193 | ||
f7c6a7b5 RD |
194 | context->closing = 1; |
195 | ||
67cdb40c | 196 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
197 | struct ib_ah *ah = uobj->object; |
198 | ||
199 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 200 | ib_destroy_ah(ah); |
67cdb40c RD |
201 | kfree(uobj); |
202 | } | |
bc38a6ab RD |
203 | |
204 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { | |
9ead190b | 205 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
206 | struct ib_uqp_object *uqp = |
207 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
208 | |
209 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
f4e40156 | 210 | ib_uverbs_detach_umcast(qp, uqp); |
bc38a6ab | 211 | ib_destroy_qp(qp); |
f4e40156 JM |
212 | ib_uverbs_release_uevent(file, &uqp->uevent); |
213 | kfree(uqp); | |
bc38a6ab RD |
214 | } |
215 | ||
216 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 217 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
218 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
219 | struct ib_ucq_object *ucq = | |
220 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
221 | |
222 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 223 | ib_destroy_cq(cq); |
70a30e16 RD |
224 | ib_uverbs_release_ucq(file, ev_file, ucq); |
225 | kfree(ucq); | |
bc38a6ab RD |
226 | } |
227 | ||
f520ba5a | 228 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 229 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
230 | struct ib_uevent_object *uevent = |
231 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
232 | |
233 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 234 | ib_destroy_srq(srq); |
70a30e16 RD |
235 | ib_uverbs_release_uevent(file, uevent); |
236 | kfree(uevent); | |
f520ba5a RD |
237 | } |
238 | ||
bc38a6ab RD |
239 | /* XXX Free MWs */ |
240 | ||
241 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { | |
9ead190b | 242 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 243 | |
9ead190b | 244 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 245 | ib_dereg_mr(mr); |
f7c6a7b5 | 246 | kfree(uobj); |
bc38a6ab RD |
247 | } |
248 | ||
249 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { | |
9ead190b RD |
250 | struct ib_pd *pd = uobj->object; |
251 | ||
252 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 253 | ib_dealloc_pd(pd); |
bc38a6ab RD |
254 | kfree(uobj); |
255 | } | |
256 | ||
bc38a6ab RD |
257 | return context->device->dealloc_ucontext(context); |
258 | } | |
259 | ||
260 | static void ib_uverbs_release_file(struct kref *ref) | |
261 | { | |
262 | struct ib_uverbs_file *file = | |
263 | container_of(ref, struct ib_uverbs_file, ref); | |
264 | ||
265 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
266 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
267 | ||
bc38a6ab RD |
268 | kfree(file); |
269 | } | |
270 | ||
271 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
272 | size_t count, loff_t *pos) | |
273 | { | |
274 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 275 | struct ib_uverbs_event *event; |
bc38a6ab RD |
276 | int eventsz; |
277 | int ret = 0; | |
278 | ||
279 | spin_lock_irq(&file->lock); | |
280 | ||
6b73597e | 281 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
282 | spin_unlock_irq(&file->lock); |
283 | ||
284 | if (filp->f_flags & O_NONBLOCK) | |
285 | return -EAGAIN; | |
286 | ||
287 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 288 | !list_empty(&file->event_list))) |
bc38a6ab RD |
289 | return -ERESTARTSYS; |
290 | ||
291 | spin_lock_irq(&file->lock); | |
292 | } | |
293 | ||
63aaf647 RD |
294 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
295 | ||
296 | if (file->is_async) | |
bc38a6ab | 297 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 298 | else |
bc38a6ab | 299 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
300 | |
301 | if (eventsz > count) { | |
302 | ret = -EINVAL; | |
303 | event = NULL; | |
63aaf647 | 304 | } else { |
bc38a6ab | 305 | list_del(file->event_list.next); |
63aaf647 RD |
306 | if (event->counter) { |
307 | ++(*event->counter); | |
308 | list_del(&event->obj_list); | |
309 | } | |
310 | } | |
bc38a6ab RD |
311 | |
312 | spin_unlock_irq(&file->lock); | |
313 | ||
314 | if (event) { | |
315 | if (copy_to_user(buf, event, eventsz)) | |
316 | ret = -EFAULT; | |
317 | else | |
318 | ret = eventsz; | |
319 | } | |
320 | ||
321 | kfree(event); | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
326 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
327 | struct poll_table_struct *wait) | |
328 | { | |
329 | unsigned int pollflags = 0; | |
330 | struct ib_uverbs_event_file *file = filp->private_data; | |
331 | ||
332 | poll_wait(filp, &file->poll_wait, wait); | |
333 | ||
334 | spin_lock_irq(&file->lock); | |
6b73597e | 335 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
336 | pollflags = POLLIN | POLLRDNORM; |
337 | spin_unlock_irq(&file->lock); | |
338 | ||
339 | return pollflags; | |
340 | } | |
341 | ||
abdf119b GN |
342 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
343 | { | |
344 | struct ib_uverbs_event_file *file = filp->private_data; | |
345 | ||
346 | return fasync_helper(fd, filp, on, &file->async_queue); | |
347 | } | |
348 | ||
bc38a6ab RD |
349 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
350 | { | |
351 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
352 | struct ib_uverbs_event *entry, *tmp; |
353 | ||
354 | spin_lock_irq(&file->lock); | |
1ae5c187 | 355 | file->is_closed = 1; |
6b73597e RD |
356 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
357 | if (entry->counter) | |
358 | list_del(&entry->obj_list); | |
359 | kfree(entry); | |
360 | } | |
361 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 362 | |
abdf119b | 363 | ib_uverbs_event_fasync(-1, filp, 0); |
6b73597e RD |
364 | |
365 | if (file->is_async) { | |
366 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
367 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
368 | } | |
369 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
370 | |
371 | return 0; | |
372 | } | |
373 | ||
2b8693c0 | 374 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 375 | .owner = THIS_MODULE, |
bc38a6ab RD |
376 | .read = ib_uverbs_event_read, |
377 | .poll = ib_uverbs_event_poll, | |
abdf119b GN |
378 | .release = ib_uverbs_event_close, |
379 | .fasync = ib_uverbs_event_fasync | |
bc38a6ab RD |
380 | }; |
381 | ||
382 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
383 | { | |
6b73597e RD |
384 | struct ib_uverbs_event_file *file = cq_context; |
385 | struct ib_ucq_object *uobj; | |
386 | struct ib_uverbs_event *entry; | |
387 | unsigned long flags; | |
388 | ||
389 | if (!file) | |
390 | return; | |
391 | ||
392 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 393 | if (file->is_closed) { |
6b73597e RD |
394 | spin_unlock_irqrestore(&file->lock, flags); |
395 | return; | |
396 | } | |
bc38a6ab RD |
397 | |
398 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
399 | if (!entry) { |
400 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 401 | return; |
305a7e87 | 402 | } |
bc38a6ab | 403 | |
63aaf647 RD |
404 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
405 | ||
406 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
407 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 408 | |
6b73597e | 409 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 410 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 411 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 412 | |
6b73597e RD |
413 | wake_up_interruptible(&file->poll_wait); |
414 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
415 | } |
416 | ||
417 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
418 | __u64 element, __u64 event, |
419 | struct list_head *obj_list, | |
420 | u32 *counter) | |
bc38a6ab | 421 | { |
63aaf647 | 422 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
423 | unsigned long flags; |
424 | ||
6b73597e | 425 | spin_lock_irqsave(&file->async_file->lock, flags); |
1ae5c187 | 426 | if (!file->async_file->is_closed) { |
6b73597e RD |
427 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
428 | return; | |
429 | } | |
430 | ||
bc38a6ab | 431 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
432 | if (!entry) { |
433 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 434 | return; |
305a7e87 | 435 | } |
bc38a6ab | 436 | |
63aaf647 RD |
437 | entry->desc.async.element = element; |
438 | entry->desc.async.event_type = event; | |
439 | entry->counter = counter; | |
bc38a6ab | 440 | |
6b73597e | 441 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
442 | if (obj_list) |
443 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 444 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 445 | |
6b73597e RD |
446 | wake_up_interruptible(&file->async_file->poll_wait); |
447 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
448 | } |
449 | ||
450 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
451 | { | |
7162a3e0 RD |
452 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
453 | struct ib_ucq_object, uobject); | |
63aaf647 | 454 | |
7162a3e0 | 455 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
456 | event->event, &uobj->async_list, |
457 | &uobj->async_events_reported); | |
bc38a6ab RD |
458 | } |
459 | ||
460 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
461 | { | |
63aaf647 RD |
462 | struct ib_uevent_object *uobj; |
463 | ||
464 | uobj = container_of(event->element.qp->uobject, | |
465 | struct ib_uevent_object, uobject); | |
466 | ||
467 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
468 | event->event, &uobj->event_list, | |
469 | &uobj->events_reported); | |
bc38a6ab RD |
470 | } |
471 | ||
f520ba5a RD |
472 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
473 | { | |
63aaf647 RD |
474 | struct ib_uevent_object *uobj; |
475 | ||
476 | uobj = container_of(event->element.srq->uobject, | |
477 | struct ib_uevent_object, uobject); | |
478 | ||
479 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
480 | event->event, &uobj->event_list, | |
481 | &uobj->events_reported); | |
f520ba5a RD |
482 | } |
483 | ||
6b73597e RD |
484 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
485 | struct ib_event *event) | |
bc38a6ab RD |
486 | { |
487 | struct ib_uverbs_file *file = | |
488 | container_of(handler, struct ib_uverbs_file, event_handler); | |
489 | ||
63aaf647 RD |
490 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
491 | NULL, NULL); | |
bc38a6ab RD |
492 | } |
493 | ||
6b73597e RD |
494 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
495 | int is_async, int *fd) | |
bc38a6ab | 496 | { |
6b73597e | 497 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab | 498 | struct file *filp; |
6b73597e | 499 | int ret; |
bc38a6ab | 500 | |
6b73597e RD |
501 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
502 | if (!ev_file) | |
503 | return ERR_PTR(-ENOMEM); | |
504 | ||
505 | kref_init(&ev_file->ref); | |
506 | spin_lock_init(&ev_file->lock); | |
507 | INIT_LIST_HEAD(&ev_file->event_list); | |
508 | init_waitqueue_head(&ev_file->poll_wait); | |
509 | ev_file->uverbs_file = uverbs_file; | |
510 | ev_file->async_queue = NULL; | |
511 | ev_file->is_async = is_async; | |
1ae5c187 | 512 | ev_file->is_closed = 0; |
6b73597e RD |
513 | |
514 | *fd = get_unused_fd(); | |
515 | if (*fd < 0) { | |
516 | ret = *fd; | |
517 | goto err; | |
518 | } | |
bc38a6ab | 519 | |
6b73597e RD |
520 | /* |
521 | * fops_get() can't fail here, because we're coming from a | |
522 | * system call on a uverbs file, which will already have a | |
523 | * module reference. | |
524 | */ | |
a7dab9e8 RD |
525 | filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root), |
526 | FMODE_READ, fops_get(&uverbs_event_fops)); | |
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 RD |
536 | err_fd: |
537 | put_unused_fd(*fd); | |
538 | ||
539 | err: | |
540 | kfree(ev_file); | |
541 | return ERR_PTR(ret); | |
542 | } | |
543 | ||
544 | /* | |
545 | * Look up a completion event file by FD. If lookup is successful, | |
546 | * takes a ref to the event file struct that it returns; if | |
547 | * unsuccessful, returns NULL. | |
548 | */ | |
549 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
550 | { | |
551 | struct ib_uverbs_event_file *ev_file = NULL; | |
552 | struct file *filp; | |
553 | ||
554 | filp = fget(fd); | |
555 | if (!filp) | |
556 | return NULL; | |
557 | ||
558 | if (filp->f_op != &uverbs_event_fops) | |
559 | goto out; | |
560 | ||
561 | ev_file = filp->private_data; | |
562 | if (ev_file->is_async) { | |
563 | ev_file = NULL; | |
564 | goto out; | |
565 | } | |
566 | ||
567 | kref_get(&ev_file->ref); | |
568 | ||
569 | out: | |
570 | fput(filp); | |
571 | return ev_file; | |
bc38a6ab RD |
572 | } |
573 | ||
574 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
575 | size_t count, loff_t *pos) | |
576 | { | |
577 | struct ib_uverbs_file *file = filp->private_data; | |
578 | struct ib_uverbs_cmd_hdr hdr; | |
579 | ||
580 | if (count < sizeof hdr) | |
581 | return -EINVAL; | |
582 | ||
583 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
584 | return -EFAULT; | |
585 | ||
586 | if (hdr.in_words * 4 != count) | |
587 | return -EINVAL; | |
588 | ||
63c47c28 RD |
589 | if (hdr.command < 0 || |
590 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || | |
883a99c7 RD |
591 | !uverbs_cmd_table[hdr.command] || |
592 | !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) | |
bc38a6ab RD |
593 | return -EINVAL; |
594 | ||
6b73597e | 595 | if (!file->ucontext && |
bc38a6ab RD |
596 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
597 | return -EINVAL; | |
598 | ||
599 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, | |
600 | hdr.in_words * 4, hdr.out_words * 4); | |
601 | } | |
602 | ||
603 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
604 | { | |
605 | struct ib_uverbs_file *file = filp->private_data; | |
606 | ||
607 | if (!file->ucontext) | |
608 | return -ENODEV; | |
609 | else | |
610 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
611 | } | |
612 | ||
613 | static int ib_uverbs_open(struct inode *inode, struct file *filp) | |
614 | { | |
70a30e16 | 615 | struct ib_uverbs_device *dev; |
bc38a6ab | 616 | struct ib_uverbs_file *file; |
70a30e16 | 617 | int ret; |
bc38a6ab | 618 | |
70a30e16 RD |
619 | spin_lock(&map_lock); |
620 | dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR]; | |
621 | if (dev) | |
622 | kref_get(&dev->ref); | |
623 | spin_unlock(&map_lock); | |
624 | ||
625 | if (!dev) | |
626 | return -ENXIO; | |
627 | ||
628 | if (!try_module_get(dev->ib_dev->owner)) { | |
629 | ret = -ENODEV; | |
630 | goto err; | |
631 | } | |
bc38a6ab | 632 | |
6b73597e | 633 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 634 | if (!file) { |
70a30e16 RD |
635 | ret = -ENOMEM; |
636 | goto err_module; | |
63c47c28 | 637 | } |
bc38a6ab | 638 | |
70a30e16 RD |
639 | file->device = dev; |
640 | file->ucontext = NULL; | |
641 | file->async_file = NULL; | |
bc38a6ab | 642 | kref_init(&file->ref); |
95ed644f | 643 | mutex_init(&file->mutex); |
bc38a6ab | 644 | |
bc38a6ab RD |
645 | filp->private_data = file; |
646 | ||
bc38a6ab | 647 | return 0; |
70a30e16 RD |
648 | |
649 | err_module: | |
650 | module_put(dev->ib_dev->owner); | |
651 | ||
652 | err: | |
653 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
654 | ||
655 | return ret; | |
bc38a6ab RD |
656 | } |
657 | ||
658 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
659 | { | |
660 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 661 | |
70a30e16 RD |
662 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
663 | ||
664 | if (file->async_file) | |
665 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 666 | |
bc38a6ab RD |
667 | kref_put(&file->ref, ib_uverbs_release_file); |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
2b8693c0 | 672 | static const struct file_operations uverbs_fops = { |
bc38a6ab RD |
673 | .owner = THIS_MODULE, |
674 | .write = ib_uverbs_write, | |
675 | .open = ib_uverbs_open, | |
676 | .release = ib_uverbs_close | |
677 | }; | |
678 | ||
2b8693c0 | 679 | static const struct file_operations uverbs_mmap_fops = { |
bc38a6ab RD |
680 | .owner = THIS_MODULE, |
681 | .write = ib_uverbs_write, | |
682 | .mmap = ib_uverbs_mmap, | |
683 | .open = ib_uverbs_open, | |
684 | .release = ib_uverbs_close | |
685 | }; | |
686 | ||
687 | static struct ib_client uverbs_client = { | |
688 | .name = "uverbs", | |
689 | .add = ib_uverbs_add_one, | |
690 | .remove = ib_uverbs_remove_one | |
691 | }; | |
692 | ||
693 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
694 | { | |
70a30e16 RD |
695 | struct ib_uverbs_device *dev = class_get_devdata(class_dev); |
696 | ||
697 | if (!dev) | |
698 | return -ENODEV; | |
bc38a6ab RD |
699 | |
700 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
701 | } | |
702 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
703 | ||
274c0891 RD |
704 | static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf) |
705 | { | |
70a30e16 RD |
706 | struct ib_uverbs_device *dev = class_get_devdata(class_dev); |
707 | ||
708 | if (!dev) | |
709 | return -ENODEV; | |
274c0891 RD |
710 | |
711 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
712 | } | |
713 | static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); | |
714 | ||
bc38a6ab RD |
715 | static ssize_t show_abi_version(struct class *class, char *buf) |
716 | { | |
717 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); | |
718 | } | |
719 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
720 | ||
721 | static void ib_uverbs_add_one(struct ib_device *device) | |
722 | { | |
723 | struct ib_uverbs_device *uverbs_dev; | |
724 | ||
725 | if (!device->alloc_ucontext) | |
726 | return; | |
727 | ||
de6eb66b | 728 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
729 | if (!uverbs_dev) |
730 | return; | |
731 | ||
70a30e16 | 732 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 733 | init_completion(&uverbs_dev->comp); |
70a30e16 | 734 | |
bc38a6ab RD |
735 | spin_lock(&map_lock); |
736 | uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); | |
737 | if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { | |
738 | spin_unlock(&map_lock); | |
739 | goto err; | |
740 | } | |
741 | set_bit(uverbs_dev->devnum, dev_map); | |
742 | spin_unlock(&map_lock); | |
743 | ||
6b73597e | 744 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 745 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 746 | |
70a30e16 RD |
747 | uverbs_dev->dev = cdev_alloc(); |
748 | if (!uverbs_dev->dev) | |
bc38a6ab | 749 | goto err; |
70a30e16 RD |
750 | uverbs_dev->dev->owner = THIS_MODULE; |
751 | uverbs_dev->dev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
752 | kobject_set_name(&uverbs_dev->dev->kobj, "uverbs%d", uverbs_dev->devnum); | |
753 | if (cdev_add(uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) | |
754 | goto err_cdev; | |
bc38a6ab | 755 | |
4cce3390 RD |
756 | uverbs_dev->class_dev = class_device_create(uverbs_class, NULL, |
757 | uverbs_dev->dev->dev, | |
70a30e16 RD |
758 | device->dma_device, |
759 | "uverbs%d", uverbs_dev->devnum); | |
760 | if (IS_ERR(uverbs_dev->class_dev)) | |
bc38a6ab RD |
761 | goto err_cdev; |
762 | ||
70a30e16 RD |
763 | class_set_devdata(uverbs_dev->class_dev, uverbs_dev); |
764 | ||
765 | if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_ibdev)) | |
bc38a6ab | 766 | goto err_class; |
70a30e16 | 767 | if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_abi_version)) |
274c0891 | 768 | goto err_class; |
bc38a6ab | 769 | |
70a30e16 RD |
770 | spin_lock(&map_lock); |
771 | dev_table[uverbs_dev->devnum] = uverbs_dev; | |
772 | spin_unlock(&map_lock); | |
773 | ||
bc38a6ab RD |
774 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
775 | ||
776 | return; | |
777 | ||
778 | err_class: | |
70a30e16 | 779 | class_device_destroy(uverbs_class, uverbs_dev->dev->dev); |
bc38a6ab RD |
780 | |
781 | err_cdev: | |
70a30e16 | 782 | cdev_del(uverbs_dev->dev); |
bc38a6ab RD |
783 | clear_bit(uverbs_dev->devnum, dev_map); |
784 | ||
785 | err: | |
70a30e16 | 786 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
787 | wait_for_completion(&uverbs_dev->comp); |
788 | kfree(uverbs_dev); | |
bc38a6ab RD |
789 | return; |
790 | } | |
791 | ||
792 | static void ib_uverbs_remove_one(struct ib_device *device) | |
793 | { | |
794 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
795 | ||
796 | if (!uverbs_dev) | |
797 | return; | |
798 | ||
70a30e16 RD |
799 | class_set_devdata(uverbs_dev->class_dev, NULL); |
800 | class_device_destroy(uverbs_class, uverbs_dev->dev->dev); | |
801 | cdev_del(uverbs_dev->dev); | |
802 | ||
803 | spin_lock(&map_lock); | |
804 | dev_table[uverbs_dev->devnum] = NULL; | |
805 | spin_unlock(&map_lock); | |
806 | ||
807 | clear_bit(uverbs_dev->devnum, dev_map); | |
fd60ae40 | 808 | |
70a30e16 | 809 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
810 | wait_for_completion(&uverbs_dev->comp); |
811 | kfree(uverbs_dev); | |
bc38a6ab RD |
812 | } |
813 | ||
454e2398 DH |
814 | static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags, |
815 | const char *dev_name, void *data, | |
816 | struct vfsmount *mnt) | |
bc38a6ab RD |
817 | { |
818 | return get_sb_pseudo(fs_type, "infinibandevent:", NULL, | |
454e2398 | 819 | INFINIBANDEVENTFS_MAGIC, mnt); |
bc38a6ab RD |
820 | } |
821 | ||
822 | static struct file_system_type uverbs_event_fs = { | |
823 | /* No owner field so module can be unloaded */ | |
824 | .name = "infinibandeventfs", | |
825 | .get_sb = uverbs_event_get_sb, | |
826 | .kill_sb = kill_litter_super | |
827 | }; | |
828 | ||
829 | static int __init ib_uverbs_init(void) | |
830 | { | |
831 | int ret; | |
832 | ||
833 | spin_lock_init(&map_lock); | |
834 | ||
835 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, | |
836 | "infiniband_verbs"); | |
837 | if (ret) { | |
838 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
839 | goto out; | |
840 | } | |
841 | ||
70a30e16 RD |
842 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
843 | if (IS_ERR(uverbs_class)) { | |
844 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
845 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
846 | goto out_chrdev; | |
847 | } | |
848 | ||
70a30e16 | 849 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
bc38a6ab RD |
850 | if (ret) { |
851 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
852 | goto out_class; | |
853 | } | |
854 | ||
855 | ret = register_filesystem(&uverbs_event_fs); | |
856 | if (ret) { | |
857 | printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n"); | |
858 | goto out_class; | |
859 | } | |
860 | ||
861 | uverbs_event_mnt = kern_mount(&uverbs_event_fs); | |
862 | if (IS_ERR(uverbs_event_mnt)) { | |
863 | ret = PTR_ERR(uverbs_event_mnt); | |
864 | printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n"); | |
865 | goto out_fs; | |
866 | } | |
867 | ||
868 | ret = ib_register_client(&uverbs_client); | |
869 | if (ret) { | |
870 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
871 | goto out_mnt; | |
872 | } | |
873 | ||
874 | return 0; | |
875 | ||
876 | out_mnt: | |
877 | mntput(uverbs_event_mnt); | |
878 | ||
879 | out_fs: | |
880 | unregister_filesystem(&uverbs_event_fs); | |
881 | ||
882 | out_class: | |
70a30e16 | 883 | class_destroy(uverbs_class); |
bc38a6ab RD |
884 | |
885 | out_chrdev: | |
886 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
887 | ||
888 | out: | |
889 | return ret; | |
890 | } | |
891 | ||
892 | static void __exit ib_uverbs_cleanup(void) | |
893 | { | |
894 | ib_unregister_client(&uverbs_client); | |
895 | mntput(uverbs_event_mnt); | |
896 | unregister_filesystem(&uverbs_event_fs); | |
70a30e16 | 897 | class_destroy(uverbs_class); |
bc38a6ab | 898 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
5d7edb3c RD |
899 | idr_destroy(&ib_uverbs_pd_idr); |
900 | idr_destroy(&ib_uverbs_mr_idr); | |
901 | idr_destroy(&ib_uverbs_mw_idr); | |
902 | idr_destroy(&ib_uverbs_ah_idr); | |
903 | idr_destroy(&ib_uverbs_cq_idr); | |
904 | idr_destroy(&ib_uverbs_qp_idr); | |
905 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
906 | } |
907 | ||
908 | module_init(ib_uverbs_init); | |
909 | module_exit(ib_uverbs_cleanup); |