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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 | ||
128 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, | |
129 | struct ib_uverbs_event_file *ev_file, | |
130 | struct ib_ucq_object *uobj) | |
131 | { | |
132 | struct ib_uverbs_event *evt, *tmp; | |
133 | ||
134 | if (ev_file) { | |
135 | spin_lock_irq(&ev_file->lock); | |
136 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
137 | list_del(&evt->list); | |
138 | kfree(evt); | |
139 | } | |
140 | spin_unlock_irq(&ev_file->lock); | |
141 | ||
142 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
143 | } | |
144 | ||
145 | spin_lock_irq(&file->async_file->lock); | |
146 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
147 | list_del(&evt->list); | |
148 | kfree(evt); | |
149 | } | |
150 | spin_unlock_irq(&file->async_file->lock); | |
151 | } | |
152 | ||
153 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
154 | struct ib_uevent_object *uobj) | |
155 | { | |
156 | struct ib_uverbs_event *evt, *tmp; | |
157 | ||
158 | spin_lock_irq(&file->async_file->lock); | |
159 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
160 | list_del(&evt->list); | |
161 | kfree(evt); | |
162 | } | |
163 | spin_unlock_irq(&file->async_file->lock); | |
164 | } | |
165 | ||
f4e40156 JM |
166 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
167 | struct ib_uqp_object *uobj) | |
168 | { | |
169 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
170 | ||
171 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
172 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
173 | list_del(&mcast->list); | |
174 | kfree(mcast); | |
175 | } | |
176 | } | |
177 | ||
70a30e16 RD |
178 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
179 | struct ib_ucontext *context) | |
bc38a6ab RD |
180 | { |
181 | struct ib_uobject *uobj, *tmp; | |
182 | ||
183 | if (!context) | |
184 | return 0; | |
185 | ||
67cdb40c | 186 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
187 | struct ib_ah *ah = uobj->object; |
188 | ||
189 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 190 | ib_destroy_ah(ah); |
67cdb40c RD |
191 | kfree(uobj); |
192 | } | |
bc38a6ab RD |
193 | |
194 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { | |
9ead190b | 195 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
196 | struct ib_uqp_object *uqp = |
197 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
198 | |
199 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
f4e40156 | 200 | ib_uverbs_detach_umcast(qp, uqp); |
bc38a6ab | 201 | ib_destroy_qp(qp); |
f4e40156 JM |
202 | ib_uverbs_release_uevent(file, &uqp->uevent); |
203 | kfree(uqp); | |
bc38a6ab RD |
204 | } |
205 | ||
206 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 207 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
208 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
209 | struct ib_ucq_object *ucq = | |
210 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
211 | |
212 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 213 | ib_destroy_cq(cq); |
70a30e16 RD |
214 | ib_uverbs_release_ucq(file, ev_file, ucq); |
215 | kfree(ucq); | |
bc38a6ab RD |
216 | } |
217 | ||
f520ba5a | 218 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 219 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
220 | struct ib_uevent_object *uevent = |
221 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
222 | |
223 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 224 | ib_destroy_srq(srq); |
70a30e16 RD |
225 | ib_uverbs_release_uevent(file, uevent); |
226 | kfree(uevent); | |
f520ba5a RD |
227 | } |
228 | ||
bc38a6ab RD |
229 | /* XXX Free MWs */ |
230 | ||
231 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { | |
9ead190b | 232 | struct ib_mr *mr = uobj->object; |
e1bcfcaa | 233 | struct ib_device *mrdev = mr->device; |
bc38a6ab RD |
234 | struct ib_umem_object *memobj; |
235 | ||
9ead190b | 236 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab RD |
237 | ib_dereg_mr(mr); |
238 | ||
239 | memobj = container_of(uobj, struct ib_umem_object, uobject); | |
e1bcfcaa | 240 | ib_umem_release_on_close(mrdev, &memobj->umem); |
bc38a6ab | 241 | |
bc38a6ab RD |
242 | kfree(memobj); |
243 | } | |
244 | ||
245 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { | |
9ead190b RD |
246 | struct ib_pd *pd = uobj->object; |
247 | ||
248 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 249 | ib_dealloc_pd(pd); |
bc38a6ab RD |
250 | kfree(uobj); |
251 | } | |
252 | ||
bc38a6ab RD |
253 | return context->device->dealloc_ucontext(context); |
254 | } | |
255 | ||
256 | static void ib_uverbs_release_file(struct kref *ref) | |
257 | { | |
258 | struct ib_uverbs_file *file = | |
259 | container_of(ref, struct ib_uverbs_file, ref); | |
260 | ||
261 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
262 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
263 | ||
bc38a6ab RD |
264 | kfree(file); |
265 | } | |
266 | ||
267 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
268 | size_t count, loff_t *pos) | |
269 | { | |
270 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 271 | struct ib_uverbs_event *event; |
bc38a6ab RD |
272 | int eventsz; |
273 | int ret = 0; | |
274 | ||
275 | spin_lock_irq(&file->lock); | |
276 | ||
6b73597e | 277 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
278 | spin_unlock_irq(&file->lock); |
279 | ||
280 | if (filp->f_flags & O_NONBLOCK) | |
281 | return -EAGAIN; | |
282 | ||
283 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 284 | !list_empty(&file->event_list))) |
bc38a6ab RD |
285 | return -ERESTARTSYS; |
286 | ||
287 | spin_lock_irq(&file->lock); | |
288 | } | |
289 | ||
63aaf647 RD |
290 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
291 | ||
292 | if (file->is_async) | |
bc38a6ab | 293 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 294 | else |
bc38a6ab | 295 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
296 | |
297 | if (eventsz > count) { | |
298 | ret = -EINVAL; | |
299 | event = NULL; | |
63aaf647 | 300 | } else { |
bc38a6ab | 301 | list_del(file->event_list.next); |
63aaf647 RD |
302 | if (event->counter) { |
303 | ++(*event->counter); | |
304 | list_del(&event->obj_list); | |
305 | } | |
306 | } | |
bc38a6ab RD |
307 | |
308 | spin_unlock_irq(&file->lock); | |
309 | ||
310 | if (event) { | |
311 | if (copy_to_user(buf, event, eventsz)) | |
312 | ret = -EFAULT; | |
313 | else | |
314 | ret = eventsz; | |
315 | } | |
316 | ||
317 | kfree(event); | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
323 | struct poll_table_struct *wait) | |
324 | { | |
325 | unsigned int pollflags = 0; | |
326 | struct ib_uverbs_event_file *file = filp->private_data; | |
327 | ||
328 | poll_wait(filp, &file->poll_wait, wait); | |
329 | ||
330 | spin_lock_irq(&file->lock); | |
6b73597e | 331 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
332 | pollflags = POLLIN | POLLRDNORM; |
333 | spin_unlock_irq(&file->lock); | |
334 | ||
335 | return pollflags; | |
336 | } | |
337 | ||
6b73597e | 338 | void ib_uverbs_release_event_file(struct kref *ref) |
bc38a6ab | 339 | { |
6b73597e RD |
340 | struct ib_uverbs_event_file *file = |
341 | container_of(ref, struct ib_uverbs_event_file, ref); | |
bc38a6ab | 342 | |
6b73597e | 343 | kfree(file); |
bc38a6ab RD |
344 | } |
345 | ||
abdf119b GN |
346 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
347 | { | |
348 | struct ib_uverbs_event_file *file = filp->private_data; | |
349 | ||
350 | return fasync_helper(fd, filp, on, &file->async_queue); | |
351 | } | |
352 | ||
bc38a6ab RD |
353 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
354 | { | |
355 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
356 | struct ib_uverbs_event *entry, *tmp; |
357 | ||
358 | spin_lock_irq(&file->lock); | |
359 | file->file = NULL; | |
360 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { | |
361 | if (entry->counter) | |
362 | list_del(&entry->obj_list); | |
363 | kfree(entry); | |
364 | } | |
365 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 366 | |
abdf119b | 367 | ib_uverbs_event_fasync(-1, filp, 0); |
6b73597e RD |
368 | |
369 | if (file->is_async) { | |
370 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
371 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
372 | } | |
373 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
374 | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static struct file_operations uverbs_event_fops = { | |
6b73597e | 379 | .owner = THIS_MODULE, |
bc38a6ab RD |
380 | .read = ib_uverbs_event_read, |
381 | .poll = ib_uverbs_event_poll, | |
abdf119b GN |
382 | .release = ib_uverbs_event_close, |
383 | .fasync = ib_uverbs_event_fasync | |
bc38a6ab RD |
384 | }; |
385 | ||
386 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
387 | { | |
6b73597e RD |
388 | struct ib_uverbs_event_file *file = cq_context; |
389 | struct ib_ucq_object *uobj; | |
390 | struct ib_uverbs_event *entry; | |
391 | unsigned long flags; | |
392 | ||
393 | if (!file) | |
394 | return; | |
395 | ||
396 | spin_lock_irqsave(&file->lock, flags); | |
397 | if (!file->file) { | |
398 | spin_unlock_irqrestore(&file->lock, flags); | |
399 | return; | |
400 | } | |
bc38a6ab RD |
401 | |
402 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
403 | if (!entry) { |
404 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 405 | return; |
305a7e87 | 406 | } |
bc38a6ab | 407 | |
63aaf647 RD |
408 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
409 | ||
410 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
411 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 412 | |
6b73597e | 413 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 414 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 415 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 416 | |
6b73597e RD |
417 | wake_up_interruptible(&file->poll_wait); |
418 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
419 | } |
420 | ||
421 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
422 | __u64 element, __u64 event, |
423 | struct list_head *obj_list, | |
424 | u32 *counter) | |
bc38a6ab | 425 | { |
63aaf647 | 426 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
427 | unsigned long flags; |
428 | ||
6b73597e RD |
429 | spin_lock_irqsave(&file->async_file->lock, flags); |
430 | if (!file->async_file->file) { | |
431 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
432 | return; | |
433 | } | |
434 | ||
bc38a6ab | 435 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
436 | if (!entry) { |
437 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 438 | return; |
305a7e87 | 439 | } |
bc38a6ab | 440 | |
63aaf647 RD |
441 | entry->desc.async.element = element; |
442 | entry->desc.async.event_type = event; | |
443 | entry->counter = counter; | |
bc38a6ab | 444 | |
6b73597e | 445 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
446 | if (obj_list) |
447 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 448 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 449 | |
6b73597e RD |
450 | wake_up_interruptible(&file->async_file->poll_wait); |
451 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
452 | } |
453 | ||
454 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
455 | { | |
7162a3e0 RD |
456 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
457 | struct ib_ucq_object, uobject); | |
63aaf647 | 458 | |
7162a3e0 | 459 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
460 | event->event, &uobj->async_list, |
461 | &uobj->async_events_reported); | |
bc38a6ab RD |
462 | } |
463 | ||
464 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
465 | { | |
63aaf647 RD |
466 | struct ib_uevent_object *uobj; |
467 | ||
468 | uobj = container_of(event->element.qp->uobject, | |
469 | struct ib_uevent_object, uobject); | |
470 | ||
471 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
472 | event->event, &uobj->event_list, | |
473 | &uobj->events_reported); | |
bc38a6ab RD |
474 | } |
475 | ||
f520ba5a RD |
476 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
477 | { | |
63aaf647 RD |
478 | struct ib_uevent_object *uobj; |
479 | ||
480 | uobj = container_of(event->element.srq->uobject, | |
481 | struct ib_uevent_object, uobject); | |
482 | ||
483 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
484 | event->event, &uobj->event_list, | |
485 | &uobj->events_reported); | |
f520ba5a RD |
486 | } |
487 | ||
6b73597e RD |
488 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
489 | struct ib_event *event) | |
bc38a6ab RD |
490 | { |
491 | struct ib_uverbs_file *file = | |
492 | container_of(handler, struct ib_uverbs_file, event_handler); | |
493 | ||
63aaf647 RD |
494 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
495 | NULL, NULL); | |
bc38a6ab RD |
496 | } |
497 | ||
6b73597e RD |
498 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
499 | int is_async, int *fd) | |
bc38a6ab | 500 | { |
6b73597e | 501 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab | 502 | struct file *filp; |
6b73597e | 503 | int ret; |
bc38a6ab | 504 | |
6b73597e RD |
505 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
506 | if (!ev_file) | |
507 | return ERR_PTR(-ENOMEM); | |
508 | ||
509 | kref_init(&ev_file->ref); | |
510 | spin_lock_init(&ev_file->lock); | |
511 | INIT_LIST_HEAD(&ev_file->event_list); | |
512 | init_waitqueue_head(&ev_file->poll_wait); | |
513 | ev_file->uverbs_file = uverbs_file; | |
514 | ev_file->async_queue = NULL; | |
515 | ev_file->is_async = is_async; | |
516 | ||
517 | *fd = get_unused_fd(); | |
518 | if (*fd < 0) { | |
519 | ret = *fd; | |
520 | goto err; | |
521 | } | |
bc38a6ab RD |
522 | |
523 | filp = get_empty_filp(); | |
524 | if (!filp) { | |
6b73597e RD |
525 | ret = -ENFILE; |
526 | goto err_fd; | |
bc38a6ab RD |
527 | } |
528 | ||
6b73597e RD |
529 | ev_file->file = filp; |
530 | ||
531 | /* | |
532 | * fops_get() can't fail here, because we're coming from a | |
533 | * system call on a uverbs file, which will already have a | |
534 | * module reference. | |
535 | */ | |
536 | filp->f_op = fops_get(&uverbs_event_fops); | |
1cfd6e64 JS |
537 | filp->f_path.mnt = mntget(uverbs_event_mnt); |
538 | filp->f_path.dentry = dget(uverbs_event_mnt->mnt_root); | |
539 | filp->f_mapping = filp->f_path.dentry->d_inode->i_mapping; | |
bc38a6ab RD |
540 | filp->f_flags = O_RDONLY; |
541 | filp->f_mode = FMODE_READ; | |
6b73597e | 542 | filp->private_data = ev_file; |
bc38a6ab | 543 | |
6b73597e | 544 | return filp; |
bc38a6ab | 545 | |
6b73597e RD |
546 | err_fd: |
547 | put_unused_fd(*fd); | |
548 | ||
549 | err: | |
550 | kfree(ev_file); | |
551 | return ERR_PTR(ret); | |
552 | } | |
553 | ||
554 | /* | |
555 | * Look up a completion event file by FD. If lookup is successful, | |
556 | * takes a ref to the event file struct that it returns; if | |
557 | * unsuccessful, returns NULL. | |
558 | */ | |
559 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
560 | { | |
561 | struct ib_uverbs_event_file *ev_file = NULL; | |
562 | struct file *filp; | |
563 | ||
564 | filp = fget(fd); | |
565 | if (!filp) | |
566 | return NULL; | |
567 | ||
568 | if (filp->f_op != &uverbs_event_fops) | |
569 | goto out; | |
570 | ||
571 | ev_file = filp->private_data; | |
572 | if (ev_file->is_async) { | |
573 | ev_file = NULL; | |
574 | goto out; | |
575 | } | |
576 | ||
577 | kref_get(&ev_file->ref); | |
578 | ||
579 | out: | |
580 | fput(filp); | |
581 | return ev_file; | |
bc38a6ab RD |
582 | } |
583 | ||
584 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
585 | size_t count, loff_t *pos) | |
586 | { | |
587 | struct ib_uverbs_file *file = filp->private_data; | |
588 | struct ib_uverbs_cmd_hdr hdr; | |
589 | ||
590 | if (count < sizeof hdr) | |
591 | return -EINVAL; | |
592 | ||
593 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
594 | return -EFAULT; | |
595 | ||
596 | if (hdr.in_words * 4 != count) | |
597 | return -EINVAL; | |
598 | ||
63c47c28 RD |
599 | if (hdr.command < 0 || |
600 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || | |
883a99c7 RD |
601 | !uverbs_cmd_table[hdr.command] || |
602 | !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) | |
bc38a6ab RD |
603 | return -EINVAL; |
604 | ||
6b73597e | 605 | if (!file->ucontext && |
bc38a6ab RD |
606 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
607 | return -EINVAL; | |
608 | ||
609 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, | |
610 | hdr.in_words * 4, hdr.out_words * 4); | |
611 | } | |
612 | ||
613 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
614 | { | |
615 | struct ib_uverbs_file *file = filp->private_data; | |
616 | ||
617 | if (!file->ucontext) | |
618 | return -ENODEV; | |
619 | else | |
620 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
621 | } | |
622 | ||
623 | static int ib_uverbs_open(struct inode *inode, struct file *filp) | |
624 | { | |
70a30e16 | 625 | struct ib_uverbs_device *dev; |
bc38a6ab | 626 | struct ib_uverbs_file *file; |
70a30e16 | 627 | int ret; |
bc38a6ab | 628 | |
70a30e16 RD |
629 | spin_lock(&map_lock); |
630 | dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR]; | |
631 | if (dev) | |
632 | kref_get(&dev->ref); | |
633 | spin_unlock(&map_lock); | |
634 | ||
635 | if (!dev) | |
636 | return -ENXIO; | |
637 | ||
638 | if (!try_module_get(dev->ib_dev->owner)) { | |
639 | ret = -ENODEV; | |
640 | goto err; | |
641 | } | |
bc38a6ab | 642 | |
6b73597e | 643 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 644 | if (!file) { |
70a30e16 RD |
645 | ret = -ENOMEM; |
646 | goto err_module; | |
63c47c28 | 647 | } |
bc38a6ab | 648 | |
70a30e16 RD |
649 | file->device = dev; |
650 | file->ucontext = NULL; | |
651 | file->async_file = NULL; | |
bc38a6ab | 652 | kref_init(&file->ref); |
95ed644f | 653 | mutex_init(&file->mutex); |
bc38a6ab | 654 | |
bc38a6ab RD |
655 | filp->private_data = file; |
656 | ||
bc38a6ab | 657 | return 0; |
70a30e16 RD |
658 | |
659 | err_module: | |
660 | module_put(dev->ib_dev->owner); | |
661 | ||
662 | err: | |
663 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
664 | ||
665 | return ret; | |
bc38a6ab RD |
666 | } |
667 | ||
668 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
669 | { | |
670 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 671 | |
70a30e16 RD |
672 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
673 | ||
674 | if (file->async_file) | |
675 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 676 | |
bc38a6ab RD |
677 | kref_put(&file->ref, ib_uverbs_release_file); |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | static struct file_operations uverbs_fops = { | |
683 | .owner = THIS_MODULE, | |
684 | .write = ib_uverbs_write, | |
685 | .open = ib_uverbs_open, | |
686 | .release = ib_uverbs_close | |
687 | }; | |
688 | ||
689 | static struct file_operations uverbs_mmap_fops = { | |
690 | .owner = THIS_MODULE, | |
691 | .write = ib_uverbs_write, | |
692 | .mmap = ib_uverbs_mmap, | |
693 | .open = ib_uverbs_open, | |
694 | .release = ib_uverbs_close | |
695 | }; | |
696 | ||
697 | static struct ib_client uverbs_client = { | |
698 | .name = "uverbs", | |
699 | .add = ib_uverbs_add_one, | |
700 | .remove = ib_uverbs_remove_one | |
701 | }; | |
702 | ||
703 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
704 | { | |
70a30e16 RD |
705 | struct ib_uverbs_device *dev = class_get_devdata(class_dev); |
706 | ||
707 | if (!dev) | |
708 | return -ENODEV; | |
bc38a6ab RD |
709 | |
710 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
711 | } | |
712 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
713 | ||
274c0891 RD |
714 | static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf) |
715 | { | |
70a30e16 RD |
716 | struct ib_uverbs_device *dev = class_get_devdata(class_dev); |
717 | ||
718 | if (!dev) | |
719 | return -ENODEV; | |
274c0891 RD |
720 | |
721 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
722 | } | |
723 | static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); | |
724 | ||
bc38a6ab RD |
725 | static ssize_t show_abi_version(struct class *class, char *buf) |
726 | { | |
727 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); | |
728 | } | |
729 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
730 | ||
731 | static void ib_uverbs_add_one(struct ib_device *device) | |
732 | { | |
733 | struct ib_uverbs_device *uverbs_dev; | |
734 | ||
735 | if (!device->alloc_ucontext) | |
736 | return; | |
737 | ||
de6eb66b | 738 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
739 | if (!uverbs_dev) |
740 | return; | |
741 | ||
70a30e16 | 742 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 743 | init_completion(&uverbs_dev->comp); |
70a30e16 | 744 | |
bc38a6ab RD |
745 | spin_lock(&map_lock); |
746 | uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); | |
747 | if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { | |
748 | spin_unlock(&map_lock); | |
749 | goto err; | |
750 | } | |
751 | set_bit(uverbs_dev->devnum, dev_map); | |
752 | spin_unlock(&map_lock); | |
753 | ||
6b73597e RD |
754 | uverbs_dev->ib_dev = device; |
755 | uverbs_dev->num_comp_vectors = 1; | |
bc38a6ab | 756 | |
70a30e16 RD |
757 | uverbs_dev->dev = cdev_alloc(); |
758 | if (!uverbs_dev->dev) | |
bc38a6ab | 759 | goto err; |
70a30e16 RD |
760 | uverbs_dev->dev->owner = THIS_MODULE; |
761 | uverbs_dev->dev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
762 | kobject_set_name(&uverbs_dev->dev->kobj, "uverbs%d", uverbs_dev->devnum); | |
763 | if (cdev_add(uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) | |
764 | goto err_cdev; | |
bc38a6ab | 765 | |
4cce3390 RD |
766 | uverbs_dev->class_dev = class_device_create(uverbs_class, NULL, |
767 | uverbs_dev->dev->dev, | |
70a30e16 RD |
768 | device->dma_device, |
769 | "uverbs%d", uverbs_dev->devnum); | |
770 | if (IS_ERR(uverbs_dev->class_dev)) | |
bc38a6ab RD |
771 | goto err_cdev; |
772 | ||
70a30e16 RD |
773 | class_set_devdata(uverbs_dev->class_dev, uverbs_dev); |
774 | ||
775 | if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_ibdev)) | |
bc38a6ab | 776 | goto err_class; |
70a30e16 | 777 | if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_abi_version)) |
274c0891 | 778 | goto err_class; |
bc38a6ab | 779 | |
70a30e16 RD |
780 | spin_lock(&map_lock); |
781 | dev_table[uverbs_dev->devnum] = uverbs_dev; | |
782 | spin_unlock(&map_lock); | |
783 | ||
bc38a6ab RD |
784 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
785 | ||
786 | return; | |
787 | ||
788 | err_class: | |
70a30e16 | 789 | class_device_destroy(uverbs_class, uverbs_dev->dev->dev); |
bc38a6ab RD |
790 | |
791 | err_cdev: | |
70a30e16 | 792 | cdev_del(uverbs_dev->dev); |
bc38a6ab RD |
793 | clear_bit(uverbs_dev->devnum, dev_map); |
794 | ||
795 | err: | |
70a30e16 | 796 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
797 | wait_for_completion(&uverbs_dev->comp); |
798 | kfree(uverbs_dev); | |
bc38a6ab RD |
799 | return; |
800 | } | |
801 | ||
802 | static void ib_uverbs_remove_one(struct ib_device *device) | |
803 | { | |
804 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
805 | ||
806 | if (!uverbs_dev) | |
807 | return; | |
808 | ||
70a30e16 RD |
809 | class_set_devdata(uverbs_dev->class_dev, NULL); |
810 | class_device_destroy(uverbs_class, uverbs_dev->dev->dev); | |
811 | cdev_del(uverbs_dev->dev); | |
812 | ||
813 | spin_lock(&map_lock); | |
814 | dev_table[uverbs_dev->devnum] = NULL; | |
815 | spin_unlock(&map_lock); | |
816 | ||
817 | clear_bit(uverbs_dev->devnum, dev_map); | |
fd60ae40 | 818 | |
70a30e16 | 819 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
820 | wait_for_completion(&uverbs_dev->comp); |
821 | kfree(uverbs_dev); | |
bc38a6ab RD |
822 | } |
823 | ||
454e2398 DH |
824 | static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags, |
825 | const char *dev_name, void *data, | |
826 | struct vfsmount *mnt) | |
bc38a6ab RD |
827 | { |
828 | return get_sb_pseudo(fs_type, "infinibandevent:", NULL, | |
454e2398 | 829 | INFINIBANDEVENTFS_MAGIC, mnt); |
bc38a6ab RD |
830 | } |
831 | ||
832 | static struct file_system_type uverbs_event_fs = { | |
833 | /* No owner field so module can be unloaded */ | |
834 | .name = "infinibandeventfs", | |
835 | .get_sb = uverbs_event_get_sb, | |
836 | .kill_sb = kill_litter_super | |
837 | }; | |
838 | ||
839 | static int __init ib_uverbs_init(void) | |
840 | { | |
841 | int ret; | |
842 | ||
843 | spin_lock_init(&map_lock); | |
844 | ||
845 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, | |
846 | "infiniband_verbs"); | |
847 | if (ret) { | |
848 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
849 | goto out; | |
850 | } | |
851 | ||
70a30e16 RD |
852 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
853 | if (IS_ERR(uverbs_class)) { | |
854 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
855 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
856 | goto out_chrdev; | |
857 | } | |
858 | ||
70a30e16 | 859 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
bc38a6ab RD |
860 | if (ret) { |
861 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
862 | goto out_class; | |
863 | } | |
864 | ||
865 | ret = register_filesystem(&uverbs_event_fs); | |
866 | if (ret) { | |
867 | printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n"); | |
868 | goto out_class; | |
869 | } | |
870 | ||
871 | uverbs_event_mnt = kern_mount(&uverbs_event_fs); | |
872 | if (IS_ERR(uverbs_event_mnt)) { | |
873 | ret = PTR_ERR(uverbs_event_mnt); | |
874 | printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n"); | |
875 | goto out_fs; | |
876 | } | |
877 | ||
878 | ret = ib_register_client(&uverbs_client); | |
879 | if (ret) { | |
880 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
881 | goto out_mnt; | |
882 | } | |
883 | ||
884 | return 0; | |
885 | ||
886 | out_mnt: | |
887 | mntput(uverbs_event_mnt); | |
888 | ||
889 | out_fs: | |
890 | unregister_filesystem(&uverbs_event_fs); | |
891 | ||
892 | out_class: | |
70a30e16 | 893 | class_destroy(uverbs_class); |
bc38a6ab RD |
894 | |
895 | out_chrdev: | |
896 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
897 | ||
898 | out: | |
899 | return ret; | |
900 | } | |
901 | ||
902 | static void __exit ib_uverbs_cleanup(void) | |
903 | { | |
904 | ib_unregister_client(&uverbs_client); | |
905 | mntput(uverbs_event_mnt); | |
906 | unregister_filesystem(&uverbs_event_fs); | |
70a30e16 | 907 | class_destroy(uverbs_class); |
bc38a6ab | 908 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
cc76e33e | 909 | flush_scheduled_work(); |
5d7edb3c RD |
910 | idr_destroy(&ib_uverbs_pd_idr); |
911 | idr_destroy(&ib_uverbs_mr_idr); | |
912 | idr_destroy(&ib_uverbs_mw_idr); | |
913 | idr_destroy(&ib_uverbs_ah_idr); | |
914 | idr_destroy(&ib_uverbs_cq_idr); | |
915 | idr_destroy(&ib_uverbs_qp_idr); | |
916 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
917 | } |
918 | ||
919 | module_init(ib_uverbs_init); | |
920 | module_exit(ib_uverbs_cleanup); |