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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> | |
43 | #include <linux/file.h> | |
44 | #include <linux/mount.h> | |
70a30e16 | 45 | #include <linux/cdev.h> |
bc38a6ab RD |
46 | |
47 | #include <asm/uaccess.h> | |
48 | ||
49 | #include "uverbs.h" | |
50 | ||
51 | MODULE_AUTHOR("Roland Dreier"); | |
52 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
53 | MODULE_LICENSE("Dual BSD/GPL"); | |
54 | ||
55 | #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */ | |
56 | ||
57 | enum { | |
58 | IB_UVERBS_MAJOR = 231, | |
59 | IB_UVERBS_BASE_MINOR = 192, | |
60 | IB_UVERBS_MAX_DEVICES = 32 | |
61 | }; | |
62 | ||
63 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) | |
64 | ||
70a30e16 RD |
65 | static struct class *uverbs_class; |
66 | ||
9ead190b | 67 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
68 | DEFINE_IDR(ib_uverbs_pd_idr); |
69 | DEFINE_IDR(ib_uverbs_mr_idr); | |
70 | DEFINE_IDR(ib_uverbs_mw_idr); | |
71 | DEFINE_IDR(ib_uverbs_ah_idr); | |
72 | DEFINE_IDR(ib_uverbs_cq_idr); | |
73 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 74 | DEFINE_IDR(ib_uverbs_srq_idr); |
bc38a6ab RD |
75 | |
76 | static spinlock_t map_lock; | |
70a30e16 | 77 | static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES]; |
bc38a6ab RD |
78 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
79 | ||
80 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
81 | const char __user *buf, int in_len, | |
82 | int out_len) = { | |
6b73597e RD |
83 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
84 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
85 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
86 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
87 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
88 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
89 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, | |
90 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, | |
91 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, | |
33b9b3ee | 92 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, |
67cdb40c RD |
93 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, |
94 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
6b73597e RD |
95 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, |
96 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
7ccc9a24 | 97 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, |
6b73597e RD |
98 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, |
99 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
67cdb40c RD |
100 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, |
101 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
102 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
103 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
104 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
6b73597e RD |
105 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, |
106 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
107 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
108 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
8bdb0e86 | 109 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, |
6b73597e | 110 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, |
bc38a6ab RD |
111 | }; |
112 | ||
113 | static struct vfsmount *uverbs_event_mnt; | |
114 | ||
115 | static void ib_uverbs_add_one(struct ib_device *device); | |
116 | static void ib_uverbs_remove_one(struct ib_device *device); | |
117 | ||
70a30e16 RD |
118 | static void ib_uverbs_release_dev(struct kref *ref) |
119 | { | |
120 | struct ib_uverbs_device *dev = | |
121 | container_of(ref, struct ib_uverbs_device, ref); | |
122 | ||
fd60ae40 | 123 | complete(&dev->comp); |
70a30e16 RD |
124 | } |
125 | ||
04d29b0e RD |
126 | static void ib_uverbs_release_event_file(struct kref *ref) |
127 | { | |
128 | struct ib_uverbs_event_file *file = | |
129 | container_of(ref, struct ib_uverbs_event_file, ref); | |
130 | ||
131 | kfree(file); | |
132 | } | |
133 | ||
70a30e16 RD |
134 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
135 | struct ib_uverbs_event_file *ev_file, | |
136 | struct ib_ucq_object *uobj) | |
137 | { | |
138 | struct ib_uverbs_event *evt, *tmp; | |
139 | ||
140 | if (ev_file) { | |
141 | spin_lock_irq(&ev_file->lock); | |
142 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
143 | list_del(&evt->list); | |
144 | kfree(evt); | |
145 | } | |
146 | spin_unlock_irq(&ev_file->lock); | |
147 | ||
148 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
149 | } | |
150 | ||
151 | spin_lock_irq(&file->async_file->lock); | |
152 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
153 | list_del(&evt->list); | |
154 | kfree(evt); | |
155 | } | |
156 | spin_unlock_irq(&file->async_file->lock); | |
157 | } | |
158 | ||
159 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
160 | struct ib_uevent_object *uobj) | |
161 | { | |
162 | struct ib_uverbs_event *evt, *tmp; | |
163 | ||
164 | spin_lock_irq(&file->async_file->lock); | |
165 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
166 | list_del(&evt->list); | |
167 | kfree(evt); | |
168 | } | |
169 | spin_unlock_irq(&file->async_file->lock); | |
170 | } | |
171 | ||
f4e40156 JM |
172 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
173 | struct ib_uqp_object *uobj) | |
174 | { | |
175 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
176 | ||
177 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
178 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
179 | list_del(&mcast->list); | |
180 | kfree(mcast); | |
181 | } | |
182 | } | |
183 | ||
70a30e16 RD |
184 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
185 | struct ib_ucontext *context) | |
bc38a6ab RD |
186 | { |
187 | struct ib_uobject *uobj, *tmp; | |
188 | ||
189 | if (!context) | |
190 | return 0; | |
191 | ||
f7c6a7b5 RD |
192 | context->closing = 1; |
193 | ||
67cdb40c | 194 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
195 | struct ib_ah *ah = uobj->object; |
196 | ||
197 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 198 | ib_destroy_ah(ah); |
67cdb40c RD |
199 | kfree(uobj); |
200 | } | |
bc38a6ab RD |
201 | |
202 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { | |
9ead190b | 203 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
204 | struct ib_uqp_object *uqp = |
205 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
206 | |
207 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
f4e40156 | 208 | ib_uverbs_detach_umcast(qp, uqp); |
bc38a6ab | 209 | ib_destroy_qp(qp); |
f4e40156 JM |
210 | ib_uverbs_release_uevent(file, &uqp->uevent); |
211 | kfree(uqp); | |
bc38a6ab RD |
212 | } |
213 | ||
214 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 215 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
216 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
217 | struct ib_ucq_object *ucq = | |
218 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
219 | |
220 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 221 | ib_destroy_cq(cq); |
70a30e16 RD |
222 | ib_uverbs_release_ucq(file, ev_file, ucq); |
223 | kfree(ucq); | |
bc38a6ab RD |
224 | } |
225 | ||
f520ba5a | 226 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 227 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
228 | struct ib_uevent_object *uevent = |
229 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
230 | |
231 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 232 | ib_destroy_srq(srq); |
70a30e16 RD |
233 | ib_uverbs_release_uevent(file, uevent); |
234 | kfree(uevent); | |
f520ba5a RD |
235 | } |
236 | ||
bc38a6ab RD |
237 | /* XXX Free MWs */ |
238 | ||
239 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { | |
9ead190b | 240 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 241 | |
9ead190b | 242 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 243 | ib_dereg_mr(mr); |
f7c6a7b5 | 244 | kfree(uobj); |
bc38a6ab RD |
245 | } |
246 | ||
247 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { | |
9ead190b RD |
248 | struct ib_pd *pd = uobj->object; |
249 | ||
250 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 251 | ib_dealloc_pd(pd); |
bc38a6ab RD |
252 | kfree(uobj); |
253 | } | |
254 | ||
bc38a6ab RD |
255 | return context->device->dealloc_ucontext(context); |
256 | } | |
257 | ||
258 | static void ib_uverbs_release_file(struct kref *ref) | |
259 | { | |
260 | struct ib_uverbs_file *file = | |
261 | container_of(ref, struct ib_uverbs_file, ref); | |
262 | ||
263 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
264 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
265 | ||
bc38a6ab RD |
266 | kfree(file); |
267 | } | |
268 | ||
269 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
270 | size_t count, loff_t *pos) | |
271 | { | |
272 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 273 | struct ib_uverbs_event *event; |
bc38a6ab RD |
274 | int eventsz; |
275 | int ret = 0; | |
276 | ||
277 | spin_lock_irq(&file->lock); | |
278 | ||
6b73597e | 279 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
280 | spin_unlock_irq(&file->lock); |
281 | ||
282 | if (filp->f_flags & O_NONBLOCK) | |
283 | return -EAGAIN; | |
284 | ||
285 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 286 | !list_empty(&file->event_list))) |
bc38a6ab RD |
287 | return -ERESTARTSYS; |
288 | ||
289 | spin_lock_irq(&file->lock); | |
290 | } | |
291 | ||
63aaf647 RD |
292 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
293 | ||
294 | if (file->is_async) | |
bc38a6ab | 295 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 296 | else |
bc38a6ab | 297 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
298 | |
299 | if (eventsz > count) { | |
300 | ret = -EINVAL; | |
301 | event = NULL; | |
63aaf647 | 302 | } else { |
bc38a6ab | 303 | list_del(file->event_list.next); |
63aaf647 RD |
304 | if (event->counter) { |
305 | ++(*event->counter); | |
306 | list_del(&event->obj_list); | |
307 | } | |
308 | } | |
bc38a6ab RD |
309 | |
310 | spin_unlock_irq(&file->lock); | |
311 | ||
312 | if (event) { | |
313 | if (copy_to_user(buf, event, eventsz)) | |
314 | ret = -EFAULT; | |
315 | else | |
316 | ret = eventsz; | |
317 | } | |
318 | ||
319 | kfree(event); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
325 | struct poll_table_struct *wait) | |
326 | { | |
327 | unsigned int pollflags = 0; | |
328 | struct ib_uverbs_event_file *file = filp->private_data; | |
329 | ||
330 | poll_wait(filp, &file->poll_wait, wait); | |
331 | ||
332 | spin_lock_irq(&file->lock); | |
6b73597e | 333 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
334 | pollflags = POLLIN | POLLRDNORM; |
335 | spin_unlock_irq(&file->lock); | |
336 | ||
337 | return pollflags; | |
338 | } | |
339 | ||
abdf119b GN |
340 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
341 | { | |
342 | struct ib_uverbs_event_file *file = filp->private_data; | |
343 | ||
344 | return fasync_helper(fd, filp, on, &file->async_queue); | |
345 | } | |
346 | ||
bc38a6ab RD |
347 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
348 | { | |
349 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
350 | struct ib_uverbs_event *entry, *tmp; |
351 | ||
352 | spin_lock_irq(&file->lock); | |
1ae5c187 | 353 | file->is_closed = 1; |
6b73597e RD |
354 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
355 | if (entry->counter) | |
356 | list_del(&entry->obj_list); | |
357 | kfree(entry); | |
358 | } | |
359 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 360 | |
6b73597e RD |
361 | if (file->is_async) { |
362 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
363 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
364 | } | |
365 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
366 | |
367 | return 0; | |
368 | } | |
369 | ||
2b8693c0 | 370 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 371 | .owner = THIS_MODULE, |
bc38a6ab RD |
372 | .read = ib_uverbs_event_read, |
373 | .poll = ib_uverbs_event_poll, | |
abdf119b GN |
374 | .release = ib_uverbs_event_close, |
375 | .fasync = ib_uverbs_event_fasync | |
bc38a6ab RD |
376 | }; |
377 | ||
378 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
379 | { | |
6b73597e RD |
380 | struct ib_uverbs_event_file *file = cq_context; |
381 | struct ib_ucq_object *uobj; | |
382 | struct ib_uverbs_event *entry; | |
383 | unsigned long flags; | |
384 | ||
385 | if (!file) | |
386 | return; | |
387 | ||
388 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 389 | if (file->is_closed) { |
6b73597e RD |
390 | spin_unlock_irqrestore(&file->lock, flags); |
391 | return; | |
392 | } | |
bc38a6ab RD |
393 | |
394 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
395 | if (!entry) { |
396 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 397 | return; |
305a7e87 | 398 | } |
bc38a6ab | 399 | |
63aaf647 RD |
400 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
401 | ||
402 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
403 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 404 | |
6b73597e | 405 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 406 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 407 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 408 | |
6b73597e RD |
409 | wake_up_interruptible(&file->poll_wait); |
410 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
411 | } |
412 | ||
413 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
414 | __u64 element, __u64 event, |
415 | struct list_head *obj_list, | |
416 | u32 *counter) | |
bc38a6ab | 417 | { |
63aaf647 | 418 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
419 | unsigned long flags; |
420 | ||
6b73597e | 421 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 422 | if (file->async_file->is_closed) { |
6b73597e RD |
423 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
424 | return; | |
425 | } | |
426 | ||
bc38a6ab | 427 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
428 | if (!entry) { |
429 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 430 | return; |
305a7e87 | 431 | } |
bc38a6ab | 432 | |
63aaf647 RD |
433 | entry->desc.async.element = element; |
434 | entry->desc.async.event_type = event; | |
435 | entry->counter = counter; | |
bc38a6ab | 436 | |
6b73597e | 437 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
438 | if (obj_list) |
439 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 440 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 441 | |
6b73597e RD |
442 | wake_up_interruptible(&file->async_file->poll_wait); |
443 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
444 | } |
445 | ||
446 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
447 | { | |
7162a3e0 RD |
448 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
449 | struct ib_ucq_object, uobject); | |
63aaf647 | 450 | |
7162a3e0 | 451 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
452 | event->event, &uobj->async_list, |
453 | &uobj->async_events_reported); | |
bc38a6ab RD |
454 | } |
455 | ||
456 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
457 | { | |
63aaf647 RD |
458 | struct ib_uevent_object *uobj; |
459 | ||
460 | uobj = container_of(event->element.qp->uobject, | |
461 | struct ib_uevent_object, uobject); | |
462 | ||
463 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
464 | event->event, &uobj->event_list, | |
465 | &uobj->events_reported); | |
bc38a6ab RD |
466 | } |
467 | ||
f520ba5a RD |
468 | void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr) |
469 | { | |
63aaf647 RD |
470 | struct ib_uevent_object *uobj; |
471 | ||
472 | uobj = container_of(event->element.srq->uobject, | |
473 | struct ib_uevent_object, uobject); | |
474 | ||
475 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
476 | event->event, &uobj->event_list, | |
477 | &uobj->events_reported); | |
f520ba5a RD |
478 | } |
479 | ||
6b73597e RD |
480 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
481 | struct ib_event *event) | |
bc38a6ab RD |
482 | { |
483 | struct ib_uverbs_file *file = | |
484 | container_of(handler, struct ib_uverbs_file, event_handler); | |
485 | ||
63aaf647 RD |
486 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
487 | NULL, NULL); | |
bc38a6ab RD |
488 | } |
489 | ||
6b73597e RD |
490 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
491 | int is_async, int *fd) | |
bc38a6ab | 492 | { |
6b73597e | 493 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab | 494 | struct file *filp; |
6b73597e | 495 | int ret; |
bc38a6ab | 496 | |
6b73597e RD |
497 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
498 | if (!ev_file) | |
499 | return ERR_PTR(-ENOMEM); | |
500 | ||
501 | kref_init(&ev_file->ref); | |
502 | spin_lock_init(&ev_file->lock); | |
503 | INIT_LIST_HEAD(&ev_file->event_list); | |
504 | init_waitqueue_head(&ev_file->poll_wait); | |
505 | ev_file->uverbs_file = uverbs_file; | |
506 | ev_file->async_queue = NULL; | |
507 | ev_file->is_async = is_async; | |
1ae5c187 | 508 | ev_file->is_closed = 0; |
6b73597e RD |
509 | |
510 | *fd = get_unused_fd(); | |
511 | if (*fd < 0) { | |
512 | ret = *fd; | |
513 | goto err; | |
514 | } | |
bc38a6ab | 515 | |
6b73597e RD |
516 | /* |
517 | * fops_get() can't fail here, because we're coming from a | |
518 | * system call on a uverbs file, which will already have a | |
519 | * module reference. | |
520 | */ | |
a7dab9e8 RD |
521 | filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root), |
522 | FMODE_READ, fops_get(&uverbs_event_fops)); | |
523 | if (!filp) { | |
524 | ret = -ENFILE; | |
525 | goto err_fd; | |
526 | } | |
527 | ||
6b73597e | 528 | filp->private_data = ev_file; |
bc38a6ab | 529 | |
6b73597e | 530 | return filp; |
bc38a6ab | 531 | |
6b73597e RD |
532 | err_fd: |
533 | put_unused_fd(*fd); | |
534 | ||
535 | err: | |
536 | kfree(ev_file); | |
537 | return ERR_PTR(ret); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Look up a completion event file by FD. If lookup is successful, | |
542 | * takes a ref to the event file struct that it returns; if | |
543 | * unsuccessful, returns NULL. | |
544 | */ | |
545 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
546 | { | |
547 | struct ib_uverbs_event_file *ev_file = NULL; | |
548 | struct file *filp; | |
549 | ||
550 | filp = fget(fd); | |
551 | if (!filp) | |
552 | return NULL; | |
553 | ||
554 | if (filp->f_op != &uverbs_event_fops) | |
555 | goto out; | |
556 | ||
557 | ev_file = filp->private_data; | |
558 | if (ev_file->is_async) { | |
559 | ev_file = NULL; | |
560 | goto out; | |
561 | } | |
562 | ||
563 | kref_get(&ev_file->ref); | |
564 | ||
565 | out: | |
566 | fput(filp); | |
567 | return ev_file; | |
bc38a6ab RD |
568 | } |
569 | ||
570 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
571 | size_t count, loff_t *pos) | |
572 | { | |
573 | struct ib_uverbs_file *file = filp->private_data; | |
574 | struct ib_uverbs_cmd_hdr hdr; | |
575 | ||
576 | if (count < sizeof hdr) | |
577 | return -EINVAL; | |
578 | ||
579 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
580 | return -EFAULT; | |
581 | ||
582 | if (hdr.in_words * 4 != count) | |
583 | return -EINVAL; | |
584 | ||
63c47c28 RD |
585 | if (hdr.command < 0 || |
586 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || | |
883a99c7 RD |
587 | !uverbs_cmd_table[hdr.command] || |
588 | !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) | |
bc38a6ab RD |
589 | return -EINVAL; |
590 | ||
6b73597e | 591 | if (!file->ucontext && |
bc38a6ab RD |
592 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
593 | return -EINVAL; | |
594 | ||
595 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, | |
596 | hdr.in_words * 4, hdr.out_words * 4); | |
597 | } | |
598 | ||
599 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
600 | { | |
601 | struct ib_uverbs_file *file = filp->private_data; | |
602 | ||
603 | if (!file->ucontext) | |
604 | return -ENODEV; | |
605 | else | |
606 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
607 | } | |
608 | ||
5b2d281a RD |
609 | /* |
610 | * ib_uverbs_open() does not need the BKL: | |
611 | * | |
612 | * - dev_table[] accesses are protected by map_lock, the | |
613 | * ib_uverbs_device structures are properly reference counted, and | |
614 | * everything else is purely local to the file being created, so | |
615 | * races against other open calls are not a problem; | |
616 | * - there is no ioctl method to race against; | |
617 | * - the device is added to dev_table[] as the last part of module | |
618 | * initialization, the open method will either immediately run | |
619 | * -ENXIO, or all required initialization will be done. | |
620 | */ | |
bc38a6ab RD |
621 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
622 | { | |
70a30e16 | 623 | struct ib_uverbs_device *dev; |
bc38a6ab | 624 | struct ib_uverbs_file *file; |
70a30e16 | 625 | int ret; |
bc38a6ab | 626 | |
70a30e16 RD |
627 | spin_lock(&map_lock); |
628 | dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR]; | |
629 | if (dev) | |
630 | kref_get(&dev->ref); | |
631 | spin_unlock(&map_lock); | |
632 | ||
5b2d281a | 633 | if (!dev) |
70a30e16 RD |
634 | return -ENXIO; |
635 | ||
636 | if (!try_module_get(dev->ib_dev->owner)) { | |
637 | ret = -ENODEV; | |
638 | goto err; | |
639 | } | |
bc38a6ab | 640 | |
6b73597e | 641 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 642 | if (!file) { |
70a30e16 RD |
643 | ret = -ENOMEM; |
644 | goto err_module; | |
63c47c28 | 645 | } |
bc38a6ab | 646 | |
70a30e16 RD |
647 | file->device = dev; |
648 | file->ucontext = NULL; | |
649 | file->async_file = NULL; | |
bc38a6ab | 650 | kref_init(&file->ref); |
95ed644f | 651 | mutex_init(&file->mutex); |
bc38a6ab | 652 | |
bc38a6ab RD |
653 | filp->private_data = file; |
654 | ||
bc38a6ab | 655 | return 0; |
70a30e16 RD |
656 | |
657 | err_module: | |
658 | module_put(dev->ib_dev->owner); | |
659 | ||
660 | err: | |
661 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 662 | return ret; |
bc38a6ab RD |
663 | } |
664 | ||
665 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
666 | { | |
667 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 668 | |
70a30e16 RD |
669 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
670 | ||
671 | if (file->async_file) | |
672 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 673 | |
bc38a6ab RD |
674 | kref_put(&file->ref, ib_uverbs_release_file); |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
2b8693c0 | 679 | static const struct file_operations uverbs_fops = { |
bc38a6ab RD |
680 | .owner = THIS_MODULE, |
681 | .write = ib_uverbs_write, | |
682 | .open = ib_uverbs_open, | |
683 | .release = ib_uverbs_close | |
684 | }; | |
685 | ||
2b8693c0 | 686 | static const struct file_operations uverbs_mmap_fops = { |
bc38a6ab RD |
687 | .owner = THIS_MODULE, |
688 | .write = ib_uverbs_write, | |
689 | .mmap = ib_uverbs_mmap, | |
690 | .open = ib_uverbs_open, | |
691 | .release = ib_uverbs_close | |
692 | }; | |
693 | ||
694 | static struct ib_client uverbs_client = { | |
695 | .name = "uverbs", | |
696 | .add = ib_uverbs_add_one, | |
697 | .remove = ib_uverbs_remove_one | |
698 | }; | |
699 | ||
f4e91eb4 TJ |
700 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
701 | char *buf) | |
bc38a6ab | 702 | { |
f4e91eb4 | 703 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
704 | |
705 | if (!dev) | |
706 | return -ENODEV; | |
bc38a6ab RD |
707 | |
708 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
709 | } | |
f4e91eb4 | 710 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 711 | |
f4e91eb4 TJ |
712 | static ssize_t show_dev_abi_version(struct device *device, |
713 | struct device_attribute *attr, char *buf) | |
274c0891 | 714 | { |
f4e91eb4 | 715 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
716 | |
717 | if (!dev) | |
718 | return -ENODEV; | |
274c0891 RD |
719 | |
720 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
721 | } | |
f4e91eb4 | 722 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 723 | |
bc38a6ab RD |
724 | static ssize_t show_abi_version(struct class *class, char *buf) |
725 | { | |
726 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); | |
727 | } | |
728 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
729 | ||
730 | static void ib_uverbs_add_one(struct ib_device *device) | |
731 | { | |
732 | struct ib_uverbs_device *uverbs_dev; | |
733 | ||
734 | if (!device->alloc_ucontext) | |
735 | return; | |
736 | ||
de6eb66b | 737 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
738 | if (!uverbs_dev) |
739 | return; | |
740 | ||
70a30e16 | 741 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 742 | init_completion(&uverbs_dev->comp); |
70a30e16 | 743 | |
bc38a6ab RD |
744 | spin_lock(&map_lock); |
745 | uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); | |
746 | if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { | |
747 | spin_unlock(&map_lock); | |
748 | goto err; | |
749 | } | |
750 | set_bit(uverbs_dev->devnum, dev_map); | |
751 | spin_unlock(&map_lock); | |
752 | ||
6b73597e | 753 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 754 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 755 | |
f4e91eb4 TJ |
756 | uverbs_dev->cdev = cdev_alloc(); |
757 | if (!uverbs_dev->cdev) | |
bc38a6ab | 758 | goto err; |
f4e91eb4 TJ |
759 | uverbs_dev->cdev->owner = THIS_MODULE; |
760 | uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
761 | kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum); | |
762 | if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) | |
70a30e16 | 763 | goto err_cdev; |
bc38a6ab | 764 | |
91bd418f GKH |
765 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
766 | uverbs_dev->cdev->dev, uverbs_dev, | |
767 | "uverbs%d", uverbs_dev->devnum); | |
f4e91eb4 | 768 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
769 | goto err_cdev; |
770 | ||
f4e91eb4 | 771 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 772 | goto err_class; |
f4e91eb4 | 773 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 774 | goto err_class; |
bc38a6ab | 775 | |
70a30e16 RD |
776 | spin_lock(&map_lock); |
777 | dev_table[uverbs_dev->devnum] = uverbs_dev; | |
778 | spin_unlock(&map_lock); | |
779 | ||
bc38a6ab RD |
780 | ib_set_client_data(device, &uverbs_client, uverbs_dev); |
781 | ||
782 | return; | |
783 | ||
784 | err_class: | |
f4e91eb4 | 785 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); |
bc38a6ab RD |
786 | |
787 | err_cdev: | |
f4e91eb4 | 788 | cdev_del(uverbs_dev->cdev); |
bc38a6ab RD |
789 | clear_bit(uverbs_dev->devnum, dev_map); |
790 | ||
791 | err: | |
70a30e16 | 792 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
793 | wait_for_completion(&uverbs_dev->comp); |
794 | kfree(uverbs_dev); | |
bc38a6ab RD |
795 | return; |
796 | } | |
797 | ||
798 | static void ib_uverbs_remove_one(struct ib_device *device) | |
799 | { | |
800 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
801 | ||
802 | if (!uverbs_dev) | |
803 | return; | |
804 | ||
f4e91eb4 TJ |
805 | dev_set_drvdata(uverbs_dev->dev, NULL); |
806 | device_destroy(uverbs_class, uverbs_dev->cdev->dev); | |
807 | cdev_del(uverbs_dev->cdev); | |
70a30e16 RD |
808 | |
809 | spin_lock(&map_lock); | |
810 | dev_table[uverbs_dev->devnum] = NULL; | |
811 | spin_unlock(&map_lock); | |
812 | ||
813 | clear_bit(uverbs_dev->devnum, dev_map); | |
fd60ae40 | 814 | |
70a30e16 | 815 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
816 | wait_for_completion(&uverbs_dev->comp); |
817 | kfree(uverbs_dev); | |
bc38a6ab RD |
818 | } |
819 | ||
454e2398 DH |
820 | static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags, |
821 | const char *dev_name, void *data, | |
822 | struct vfsmount *mnt) | |
bc38a6ab RD |
823 | { |
824 | return get_sb_pseudo(fs_type, "infinibandevent:", NULL, | |
454e2398 | 825 | INFINIBANDEVENTFS_MAGIC, mnt); |
bc38a6ab RD |
826 | } |
827 | ||
828 | static struct file_system_type uverbs_event_fs = { | |
829 | /* No owner field so module can be unloaded */ | |
830 | .name = "infinibandeventfs", | |
831 | .get_sb = uverbs_event_get_sb, | |
832 | .kill_sb = kill_litter_super | |
833 | }; | |
834 | ||
835 | static int __init ib_uverbs_init(void) | |
836 | { | |
837 | int ret; | |
838 | ||
839 | spin_lock_init(&map_lock); | |
840 | ||
841 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, | |
842 | "infiniband_verbs"); | |
843 | if (ret) { | |
844 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
845 | goto out; | |
846 | } | |
847 | ||
70a30e16 RD |
848 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
849 | if (IS_ERR(uverbs_class)) { | |
850 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
851 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
852 | goto out_chrdev; | |
853 | } | |
854 | ||
70a30e16 | 855 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
bc38a6ab RD |
856 | if (ret) { |
857 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
858 | goto out_class; | |
859 | } | |
860 | ||
861 | ret = register_filesystem(&uverbs_event_fs); | |
862 | if (ret) { | |
863 | printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n"); | |
864 | goto out_class; | |
865 | } | |
866 | ||
867 | uverbs_event_mnt = kern_mount(&uverbs_event_fs); | |
868 | if (IS_ERR(uverbs_event_mnt)) { | |
869 | ret = PTR_ERR(uverbs_event_mnt); | |
870 | printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n"); | |
871 | goto out_fs; | |
872 | } | |
873 | ||
874 | ret = ib_register_client(&uverbs_client); | |
875 | if (ret) { | |
876 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
877 | goto out_mnt; | |
878 | } | |
879 | ||
880 | return 0; | |
881 | ||
882 | out_mnt: | |
883 | mntput(uverbs_event_mnt); | |
884 | ||
885 | out_fs: | |
886 | unregister_filesystem(&uverbs_event_fs); | |
887 | ||
888 | out_class: | |
70a30e16 | 889 | class_destroy(uverbs_class); |
bc38a6ab RD |
890 | |
891 | out_chrdev: | |
892 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
893 | ||
894 | out: | |
895 | return ret; | |
896 | } | |
897 | ||
898 | static void __exit ib_uverbs_cleanup(void) | |
899 | { | |
900 | ib_unregister_client(&uverbs_client); | |
901 | mntput(uverbs_event_mnt); | |
902 | unregister_filesystem(&uverbs_event_fs); | |
70a30e16 | 903 | class_destroy(uverbs_class); |
bc38a6ab | 904 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
5d7edb3c RD |
905 | idr_destroy(&ib_uverbs_pd_idr); |
906 | idr_destroy(&ib_uverbs_mr_idr); | |
907 | idr_destroy(&ib_uverbs_mw_idr); | |
908 | idr_destroy(&ib_uverbs_ah_idr); | |
909 | idr_destroy(&ib_uverbs_cq_idr); | |
910 | idr_destroy(&ib_uverbs_qp_idr); | |
911 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
912 | } |
913 | ||
914 | module_init(ib_uverbs_init); | |
915 | module_exit(ib_uverbs_cleanup); |