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bc38a6ab RD |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
33b9b3ee | 3 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. |
2a1d9b7f RD |
4 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. |
5 | * Copyright (c) 2005 Voltaire, Inc. All rights reserved. | |
67cdb40c | 6 | * Copyright (c) 2005 PathScale, Inc. All rights reserved. |
bc38a6ab RD |
7 | * |
8 | * This software is available to you under a choice of one of two | |
9 | * licenses. You may choose to be licensed under the terms of the GNU | |
10 | * General Public License (GPL) Version 2, available from the file | |
11 | * COPYING in the main directory of this source tree, or the | |
12 | * OpenIB.org BSD license below: | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or | |
15 | * without modification, are permitted provided that the following | |
16 | * conditions are met: | |
17 | * | |
18 | * - Redistributions of source code must retain the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer. | |
21 | * | |
22 | * - Redistributions in binary form must reproduce the above | |
23 | * copyright notice, this list of conditions and the following | |
24 | * disclaimer in the documentation and/or other materials | |
25 | * provided with the distribution. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
28 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
29 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
30 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
31 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
32 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
33 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
34 | * SOFTWARE. | |
bc38a6ab RD |
35 | */ |
36 | ||
37 | #include <linux/module.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/device.h> | |
40 | #include <linux/err.h> | |
41 | #include <linux/fs.h> | |
42 | #include <linux/poll.h> | |
a99bbaf5 | 43 | #include <linux/sched.h> |
bc38a6ab | 44 | #include <linux/file.h> |
70a30e16 | 45 | #include <linux/cdev.h> |
a265e558 | 46 | #include <linux/anon_inodes.h> |
bc38a6ab RD |
47 | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include "uverbs.h" | |
51 | ||
52 | MODULE_AUTHOR("Roland Dreier"); | |
53 | MODULE_DESCRIPTION("InfiniBand userspace verbs access"); | |
54 | MODULE_LICENSE("Dual BSD/GPL"); | |
55 | ||
bc38a6ab RD |
56 | enum { |
57 | IB_UVERBS_MAJOR = 231, | |
58 | IB_UVERBS_BASE_MINOR = 192, | |
59 | IB_UVERBS_MAX_DEVICES = 32 | |
60 | }; | |
61 | ||
62 | #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) | |
63 | ||
70a30e16 RD |
64 | static struct class *uverbs_class; |
65 | ||
9ead190b | 66 | DEFINE_SPINLOCK(ib_uverbs_idr_lock); |
bc38a6ab RD |
67 | DEFINE_IDR(ib_uverbs_pd_idr); |
68 | DEFINE_IDR(ib_uverbs_mr_idr); | |
69 | DEFINE_IDR(ib_uverbs_mw_idr); | |
70 | DEFINE_IDR(ib_uverbs_ah_idr); | |
71 | DEFINE_IDR(ib_uverbs_cq_idr); | |
72 | DEFINE_IDR(ib_uverbs_qp_idr); | |
f520ba5a | 73 | DEFINE_IDR(ib_uverbs_srq_idr); |
bc38a6ab | 74 | |
6276e08a | 75 | static DEFINE_SPINLOCK(map_lock); |
bc38a6ab RD |
76 | static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES); |
77 | ||
78 | static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file, | |
79 | const char __user *buf, int in_len, | |
80 | int out_len) = { | |
9afed76d AC |
81 | [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context, |
82 | [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device, | |
83 | [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port, | |
84 | [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd, | |
85 | [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd, | |
86 | [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr, | |
87 | [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr, | |
6b73597e | 88 | [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel, |
9afed76d AC |
89 | [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq, |
90 | [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq, | |
91 | [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq, | |
92 | [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq, | |
93 | [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq, | |
94 | [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp, | |
95 | [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp, | |
96 | [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp, | |
97 | [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp, | |
98 | [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send, | |
99 | [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv, | |
100 | [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv, | |
101 | [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah, | |
102 | [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah, | |
103 | [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast, | |
104 | [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast, | |
105 | [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq, | |
106 | [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq, | |
107 | [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq, | |
108 | [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq, | |
bc38a6ab RD |
109 | }; |
110 | ||
bc38a6ab RD |
111 | static void ib_uverbs_add_one(struct ib_device *device); |
112 | static void ib_uverbs_remove_one(struct ib_device *device); | |
113 | ||
70a30e16 RD |
114 | static void ib_uverbs_release_dev(struct kref *ref) |
115 | { | |
116 | struct ib_uverbs_device *dev = | |
117 | container_of(ref, struct ib_uverbs_device, ref); | |
118 | ||
fd60ae40 | 119 | complete(&dev->comp); |
70a30e16 RD |
120 | } |
121 | ||
04d29b0e RD |
122 | static void ib_uverbs_release_event_file(struct kref *ref) |
123 | { | |
124 | struct ib_uverbs_event_file *file = | |
125 | container_of(ref, struct ib_uverbs_event_file, ref); | |
126 | ||
127 | kfree(file); | |
128 | } | |
129 | ||
70a30e16 RD |
130 | void ib_uverbs_release_ucq(struct ib_uverbs_file *file, |
131 | struct ib_uverbs_event_file *ev_file, | |
132 | struct ib_ucq_object *uobj) | |
133 | { | |
134 | struct ib_uverbs_event *evt, *tmp; | |
135 | ||
136 | if (ev_file) { | |
137 | spin_lock_irq(&ev_file->lock); | |
138 | list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) { | |
139 | list_del(&evt->list); | |
140 | kfree(evt); | |
141 | } | |
142 | spin_unlock_irq(&ev_file->lock); | |
143 | ||
144 | kref_put(&ev_file->ref, ib_uverbs_release_event_file); | |
145 | } | |
146 | ||
147 | spin_lock_irq(&file->async_file->lock); | |
148 | list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) { | |
149 | list_del(&evt->list); | |
150 | kfree(evt); | |
151 | } | |
152 | spin_unlock_irq(&file->async_file->lock); | |
153 | } | |
154 | ||
155 | void ib_uverbs_release_uevent(struct ib_uverbs_file *file, | |
156 | struct ib_uevent_object *uobj) | |
157 | { | |
158 | struct ib_uverbs_event *evt, *tmp; | |
159 | ||
160 | spin_lock_irq(&file->async_file->lock); | |
161 | list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { | |
162 | list_del(&evt->list); | |
163 | kfree(evt); | |
164 | } | |
165 | spin_unlock_irq(&file->async_file->lock); | |
166 | } | |
167 | ||
f4e40156 JM |
168 | static void ib_uverbs_detach_umcast(struct ib_qp *qp, |
169 | struct ib_uqp_object *uobj) | |
170 | { | |
171 | struct ib_uverbs_mcast_entry *mcast, *tmp; | |
172 | ||
173 | list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) { | |
174 | ib_detach_mcast(qp, &mcast->gid, mcast->lid); | |
175 | list_del(&mcast->list); | |
176 | kfree(mcast); | |
177 | } | |
178 | } | |
179 | ||
70a30e16 RD |
180 | static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, |
181 | struct ib_ucontext *context) | |
bc38a6ab RD |
182 | { |
183 | struct ib_uobject *uobj, *tmp; | |
184 | ||
185 | if (!context) | |
186 | return 0; | |
187 | ||
f7c6a7b5 RD |
188 | context->closing = 1; |
189 | ||
67cdb40c | 190 | list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { |
9ead190b RD |
191 | struct ib_ah *ah = uobj->object; |
192 | ||
193 | idr_remove_uobj(&ib_uverbs_ah_idr, uobj); | |
67cdb40c | 194 | ib_destroy_ah(ah); |
67cdb40c RD |
195 | kfree(uobj); |
196 | } | |
bc38a6ab RD |
197 | |
198 | list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { | |
9ead190b | 199 | struct ib_qp *qp = uobj->object; |
f4e40156 JM |
200 | struct ib_uqp_object *uqp = |
201 | container_of(uobj, struct ib_uqp_object, uevent.uobject); | |
9ead190b RD |
202 | |
203 | idr_remove_uobj(&ib_uverbs_qp_idr, uobj); | |
f4e40156 | 204 | ib_uverbs_detach_umcast(qp, uqp); |
bc38a6ab | 205 | ib_destroy_qp(qp); |
f4e40156 JM |
206 | ib_uverbs_release_uevent(file, &uqp->uevent); |
207 | kfree(uqp); | |
bc38a6ab RD |
208 | } |
209 | ||
210 | list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { | |
9ead190b | 211 | struct ib_cq *cq = uobj->object; |
70a30e16 RD |
212 | struct ib_uverbs_event_file *ev_file = cq->cq_context; |
213 | struct ib_ucq_object *ucq = | |
214 | container_of(uobj, struct ib_ucq_object, uobject); | |
9ead190b RD |
215 | |
216 | idr_remove_uobj(&ib_uverbs_cq_idr, uobj); | |
bc38a6ab | 217 | ib_destroy_cq(cq); |
70a30e16 RD |
218 | ib_uverbs_release_ucq(file, ev_file, ucq); |
219 | kfree(ucq); | |
bc38a6ab RD |
220 | } |
221 | ||
f520ba5a | 222 | list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { |
9ead190b | 223 | struct ib_srq *srq = uobj->object; |
70a30e16 RD |
224 | struct ib_uevent_object *uevent = |
225 | container_of(uobj, struct ib_uevent_object, uobject); | |
9ead190b RD |
226 | |
227 | idr_remove_uobj(&ib_uverbs_srq_idr, uobj); | |
f520ba5a | 228 | ib_destroy_srq(srq); |
70a30e16 RD |
229 | ib_uverbs_release_uevent(file, uevent); |
230 | kfree(uevent); | |
f520ba5a RD |
231 | } |
232 | ||
bc38a6ab RD |
233 | /* XXX Free MWs */ |
234 | ||
235 | list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { | |
9ead190b | 236 | struct ib_mr *mr = uobj->object; |
bc38a6ab | 237 | |
9ead190b | 238 | idr_remove_uobj(&ib_uverbs_mr_idr, uobj); |
bc38a6ab | 239 | ib_dereg_mr(mr); |
f7c6a7b5 | 240 | kfree(uobj); |
bc38a6ab RD |
241 | } |
242 | ||
243 | list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { | |
9ead190b RD |
244 | struct ib_pd *pd = uobj->object; |
245 | ||
246 | idr_remove_uobj(&ib_uverbs_pd_idr, uobj); | |
bc38a6ab | 247 | ib_dealloc_pd(pd); |
bc38a6ab RD |
248 | kfree(uobj); |
249 | } | |
250 | ||
bc38a6ab RD |
251 | return context->device->dealloc_ucontext(context); |
252 | } | |
253 | ||
254 | static void ib_uverbs_release_file(struct kref *ref) | |
255 | { | |
256 | struct ib_uverbs_file *file = | |
257 | container_of(ref, struct ib_uverbs_file, ref); | |
258 | ||
259 | module_put(file->device->ib_dev->owner); | |
70a30e16 RD |
260 | kref_put(&file->device->ref, ib_uverbs_release_dev); |
261 | ||
bc38a6ab RD |
262 | kfree(file); |
263 | } | |
264 | ||
265 | static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf, | |
266 | size_t count, loff_t *pos) | |
267 | { | |
268 | struct ib_uverbs_event_file *file = filp->private_data; | |
63aaf647 | 269 | struct ib_uverbs_event *event; |
bc38a6ab RD |
270 | int eventsz; |
271 | int ret = 0; | |
272 | ||
273 | spin_lock_irq(&file->lock); | |
274 | ||
6b73597e | 275 | while (list_empty(&file->event_list)) { |
bc38a6ab RD |
276 | spin_unlock_irq(&file->lock); |
277 | ||
278 | if (filp->f_flags & O_NONBLOCK) | |
279 | return -EAGAIN; | |
280 | ||
281 | if (wait_event_interruptible(file->poll_wait, | |
6b73597e | 282 | !list_empty(&file->event_list))) |
bc38a6ab RD |
283 | return -ERESTARTSYS; |
284 | ||
285 | spin_lock_irq(&file->lock); | |
286 | } | |
287 | ||
63aaf647 RD |
288 | event = list_entry(file->event_list.next, struct ib_uverbs_event, list); |
289 | ||
290 | if (file->is_async) | |
bc38a6ab | 291 | eventsz = sizeof (struct ib_uverbs_async_event_desc); |
63aaf647 | 292 | else |
bc38a6ab | 293 | eventsz = sizeof (struct ib_uverbs_comp_event_desc); |
bc38a6ab RD |
294 | |
295 | if (eventsz > count) { | |
296 | ret = -EINVAL; | |
297 | event = NULL; | |
63aaf647 | 298 | } else { |
bc38a6ab | 299 | list_del(file->event_list.next); |
63aaf647 RD |
300 | if (event->counter) { |
301 | ++(*event->counter); | |
302 | list_del(&event->obj_list); | |
303 | } | |
304 | } | |
bc38a6ab RD |
305 | |
306 | spin_unlock_irq(&file->lock); | |
307 | ||
308 | if (event) { | |
309 | if (copy_to_user(buf, event, eventsz)) | |
310 | ret = -EFAULT; | |
311 | else | |
312 | ret = eventsz; | |
313 | } | |
314 | ||
315 | kfree(event); | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
320 | static unsigned int ib_uverbs_event_poll(struct file *filp, | |
321 | struct poll_table_struct *wait) | |
322 | { | |
323 | unsigned int pollflags = 0; | |
324 | struct ib_uverbs_event_file *file = filp->private_data; | |
325 | ||
326 | poll_wait(filp, &file->poll_wait, wait); | |
327 | ||
328 | spin_lock_irq(&file->lock); | |
6b73597e | 329 | if (!list_empty(&file->event_list)) |
bc38a6ab RD |
330 | pollflags = POLLIN | POLLRDNORM; |
331 | spin_unlock_irq(&file->lock); | |
332 | ||
333 | return pollflags; | |
334 | } | |
335 | ||
abdf119b GN |
336 | static int ib_uverbs_event_fasync(int fd, struct file *filp, int on) |
337 | { | |
338 | struct ib_uverbs_event_file *file = filp->private_data; | |
339 | ||
340 | return fasync_helper(fd, filp, on, &file->async_queue); | |
341 | } | |
342 | ||
bc38a6ab RD |
343 | static int ib_uverbs_event_close(struct inode *inode, struct file *filp) |
344 | { | |
345 | struct ib_uverbs_event_file *file = filp->private_data; | |
6b73597e RD |
346 | struct ib_uverbs_event *entry, *tmp; |
347 | ||
348 | spin_lock_irq(&file->lock); | |
1ae5c187 | 349 | file->is_closed = 1; |
6b73597e RD |
350 | list_for_each_entry_safe(entry, tmp, &file->event_list, list) { |
351 | if (entry->counter) | |
352 | list_del(&entry->obj_list); | |
353 | kfree(entry); | |
354 | } | |
355 | spin_unlock_irq(&file->lock); | |
bc38a6ab | 356 | |
6b73597e RD |
357 | if (file->is_async) { |
358 | ib_unregister_event_handler(&file->uverbs_file->event_handler); | |
359 | kref_put(&file->uverbs_file->ref, ib_uverbs_release_file); | |
360 | } | |
361 | kref_put(&file->ref, ib_uverbs_release_event_file); | |
bc38a6ab RD |
362 | |
363 | return 0; | |
364 | } | |
365 | ||
2b8693c0 | 366 | static const struct file_operations uverbs_event_fops = { |
6b73597e | 367 | .owner = THIS_MODULE, |
9afed76d | 368 | .read = ib_uverbs_event_read, |
bc38a6ab | 369 | .poll = ib_uverbs_event_poll, |
abdf119b GN |
370 | .release = ib_uverbs_event_close, |
371 | .fasync = ib_uverbs_event_fasync | |
bc38a6ab RD |
372 | }; |
373 | ||
374 | void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) | |
375 | { | |
6b73597e RD |
376 | struct ib_uverbs_event_file *file = cq_context; |
377 | struct ib_ucq_object *uobj; | |
378 | struct ib_uverbs_event *entry; | |
379 | unsigned long flags; | |
380 | ||
381 | if (!file) | |
382 | return; | |
383 | ||
384 | spin_lock_irqsave(&file->lock, flags); | |
1ae5c187 | 385 | if (file->is_closed) { |
6b73597e RD |
386 | spin_unlock_irqrestore(&file->lock, flags); |
387 | return; | |
388 | } | |
bc38a6ab RD |
389 | |
390 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); | |
305a7e87 RD |
391 | if (!entry) { |
392 | spin_unlock_irqrestore(&file->lock, flags); | |
bc38a6ab | 393 | return; |
305a7e87 | 394 | } |
bc38a6ab | 395 | |
63aaf647 RD |
396 | uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); |
397 | ||
398 | entry->desc.comp.cq_handle = cq->uobject->user_handle; | |
399 | entry->counter = &uobj->comp_events_reported; | |
bc38a6ab | 400 | |
6b73597e | 401 | list_add_tail(&entry->list, &file->event_list); |
63aaf647 | 402 | list_add_tail(&entry->obj_list, &uobj->comp_list); |
6b73597e | 403 | spin_unlock_irqrestore(&file->lock, flags); |
bc38a6ab | 404 | |
6b73597e RD |
405 | wake_up_interruptible(&file->poll_wait); |
406 | kill_fasync(&file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
407 | } |
408 | ||
409 | static void ib_uverbs_async_handler(struct ib_uverbs_file *file, | |
63aaf647 RD |
410 | __u64 element, __u64 event, |
411 | struct list_head *obj_list, | |
412 | u32 *counter) | |
bc38a6ab | 413 | { |
63aaf647 | 414 | struct ib_uverbs_event *entry; |
bc38a6ab RD |
415 | unsigned long flags; |
416 | ||
6b73597e | 417 | spin_lock_irqsave(&file->async_file->lock, flags); |
fb77bcef | 418 | if (file->async_file->is_closed) { |
6b73597e RD |
419 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
420 | return; | |
421 | } | |
422 | ||
bc38a6ab | 423 | entry = kmalloc(sizeof *entry, GFP_ATOMIC); |
305a7e87 RD |
424 | if (!entry) { |
425 | spin_unlock_irqrestore(&file->async_file->lock, flags); | |
bc38a6ab | 426 | return; |
305a7e87 | 427 | } |
bc38a6ab | 428 | |
63aaf647 RD |
429 | entry->desc.async.element = element; |
430 | entry->desc.async.event_type = event; | |
431 | entry->counter = counter; | |
bc38a6ab | 432 | |
6b73597e | 433 | list_add_tail(&entry->list, &file->async_file->event_list); |
63aaf647 RD |
434 | if (obj_list) |
435 | list_add_tail(&entry->obj_list, obj_list); | |
6b73597e | 436 | spin_unlock_irqrestore(&file->async_file->lock, flags); |
bc38a6ab | 437 | |
6b73597e RD |
438 | wake_up_interruptible(&file->async_file->poll_wait); |
439 | kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN); | |
bc38a6ab RD |
440 | } |
441 | ||
442 | void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) | |
443 | { | |
7162a3e0 RD |
444 | struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, |
445 | struct ib_ucq_object, uobject); | |
63aaf647 | 446 | |
7162a3e0 | 447 | ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle, |
63aaf647 RD |
448 | event->event, &uobj->async_list, |
449 | &uobj->async_events_reported); | |
bc38a6ab RD |
450 | } |
451 | ||
452 | void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) | |
453 | { | |
63aaf647 RD |
454 | struct ib_uevent_object *uobj; |
455 | ||
456 | uobj = container_of(event->element.qp->uobject, | |
457 | struct ib_uevent_object, uobject); | |
458 | ||
459 | ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, | |
460 | event->event, &uobj->event_list, | |
461 | &uobj->events_reported); | |
bc38a6ab RD |
462 | } |
463 | ||
f520ba5a RD |
464 | void ib_uverbs_srq_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.srq->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); | |
f520ba5a RD |
474 | } |
475 | ||
6b73597e RD |
476 | void ib_uverbs_event_handler(struct ib_event_handler *handler, |
477 | struct ib_event *event) | |
bc38a6ab RD |
478 | { |
479 | struct ib_uverbs_file *file = | |
480 | container_of(handler, struct ib_uverbs_file, event_handler); | |
481 | ||
63aaf647 RD |
482 | ib_uverbs_async_handler(file, event->element.port_num, event->event, |
483 | NULL, NULL); | |
bc38a6ab RD |
484 | } |
485 | ||
6b73597e | 486 | struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, |
b1e4594b | 487 | int is_async) |
bc38a6ab | 488 | { |
6b73597e | 489 | struct ib_uverbs_event_file *ev_file; |
bc38a6ab RD |
490 | struct file *filp; |
491 | ||
6b73597e RD |
492 | ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL); |
493 | if (!ev_file) | |
494 | return ERR_PTR(-ENOMEM); | |
495 | ||
496 | kref_init(&ev_file->ref); | |
497 | spin_lock_init(&ev_file->lock); | |
498 | INIT_LIST_HEAD(&ev_file->event_list); | |
499 | init_waitqueue_head(&ev_file->poll_wait); | |
500 | ev_file->uverbs_file = uverbs_file; | |
501 | ev_file->async_queue = NULL; | |
502 | ev_file->is_async = is_async; | |
1ae5c187 | 503 | ev_file->is_closed = 0; |
6b73597e | 504 | |
b1e4594b | 505 | filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops, |
a265e558 | 506 | ev_file, O_RDONLY); |
b1e4594b AV |
507 | if (IS_ERR(filp)) |
508 | kfree(ev_file); | |
a7dab9e8 | 509 | |
6b73597e | 510 | return filp; |
6b73597e RD |
511 | } |
512 | ||
513 | /* | |
514 | * Look up a completion event file by FD. If lookup is successful, | |
515 | * takes a ref to the event file struct that it returns; if | |
516 | * unsuccessful, returns NULL. | |
517 | */ | |
518 | struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd) | |
519 | { | |
520 | struct ib_uverbs_event_file *ev_file = NULL; | |
521 | struct file *filp; | |
522 | ||
523 | filp = fget(fd); | |
524 | if (!filp) | |
525 | return NULL; | |
526 | ||
527 | if (filp->f_op != &uverbs_event_fops) | |
528 | goto out; | |
529 | ||
530 | ev_file = filp->private_data; | |
531 | if (ev_file->is_async) { | |
532 | ev_file = NULL; | |
533 | goto out; | |
534 | } | |
535 | ||
536 | kref_get(&ev_file->ref); | |
537 | ||
538 | out: | |
539 | fput(filp); | |
540 | return ev_file; | |
bc38a6ab RD |
541 | } |
542 | ||
543 | static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf, | |
544 | size_t count, loff_t *pos) | |
545 | { | |
546 | struct ib_uverbs_file *file = filp->private_data; | |
547 | struct ib_uverbs_cmd_hdr hdr; | |
548 | ||
549 | if (count < sizeof hdr) | |
550 | return -EINVAL; | |
551 | ||
552 | if (copy_from_user(&hdr, buf, sizeof hdr)) | |
553 | return -EFAULT; | |
554 | ||
555 | if (hdr.in_words * 4 != count) | |
556 | return -EINVAL; | |
557 | ||
63c47c28 RD |
558 | if (hdr.command < 0 || |
559 | hdr.command >= ARRAY_SIZE(uverbs_cmd_table) || | |
b1b8afb8 | 560 | !uverbs_cmd_table[hdr.command]) |
bc38a6ab RD |
561 | return -EINVAL; |
562 | ||
6b73597e | 563 | if (!file->ucontext && |
bc38a6ab RD |
564 | hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT) |
565 | return -EINVAL; | |
566 | ||
b1b8afb8 JM |
567 | if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command))) |
568 | return -ENOSYS; | |
569 | ||
bc38a6ab RD |
570 | return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr, |
571 | hdr.in_words * 4, hdr.out_words * 4); | |
572 | } | |
573 | ||
574 | static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma) | |
575 | { | |
576 | struct ib_uverbs_file *file = filp->private_data; | |
577 | ||
578 | if (!file->ucontext) | |
579 | return -ENODEV; | |
580 | else | |
581 | return file->device->ib_dev->mmap(file->ucontext, vma); | |
582 | } | |
583 | ||
5b2d281a RD |
584 | /* |
585 | * ib_uverbs_open() does not need the BKL: | |
586 | * | |
2a72f212 | 587 | * - the ib_uverbs_device structures are properly reference counted and |
5b2d281a RD |
588 | * everything else is purely local to the file being created, so |
589 | * races against other open calls are not a problem; | |
590 | * - there is no ioctl method to race against; | |
2a72f212 AC |
591 | * - the open method will either immediately run -ENXIO, or all |
592 | * required initialization will be done. | |
5b2d281a | 593 | */ |
bc38a6ab RD |
594 | static int ib_uverbs_open(struct inode *inode, struct file *filp) |
595 | { | |
70a30e16 | 596 | struct ib_uverbs_device *dev; |
bc38a6ab | 597 | struct ib_uverbs_file *file; |
70a30e16 | 598 | int ret; |
bc38a6ab | 599 | |
2a72f212 | 600 | dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev); |
70a30e16 RD |
601 | if (dev) |
602 | kref_get(&dev->ref); | |
2a72f212 | 603 | else |
70a30e16 RD |
604 | return -ENXIO; |
605 | ||
606 | if (!try_module_get(dev->ib_dev->owner)) { | |
607 | ret = -ENODEV; | |
608 | goto err; | |
609 | } | |
bc38a6ab | 610 | |
6b73597e | 611 | file = kmalloc(sizeof *file, GFP_KERNEL); |
63c47c28 | 612 | if (!file) { |
70a30e16 RD |
613 | ret = -ENOMEM; |
614 | goto err_module; | |
63c47c28 | 615 | } |
bc38a6ab | 616 | |
70a30e16 RD |
617 | file->device = dev; |
618 | file->ucontext = NULL; | |
619 | file->async_file = NULL; | |
bc38a6ab | 620 | kref_init(&file->ref); |
95ed644f | 621 | mutex_init(&file->mutex); |
bc38a6ab | 622 | |
bc38a6ab RD |
623 | filp->private_data = file; |
624 | ||
bc38a6ab | 625 | return 0; |
70a30e16 RD |
626 | |
627 | err_module: | |
628 | module_put(dev->ib_dev->owner); | |
629 | ||
630 | err: | |
631 | kref_put(&dev->ref, ib_uverbs_release_dev); | |
70a30e16 | 632 | return ret; |
bc38a6ab RD |
633 | } |
634 | ||
635 | static int ib_uverbs_close(struct inode *inode, struct file *filp) | |
636 | { | |
637 | struct ib_uverbs_file *file = filp->private_data; | |
bc38a6ab | 638 | |
70a30e16 RD |
639 | ib_uverbs_cleanup_ucontext(file, file->ucontext); |
640 | ||
641 | if (file->async_file) | |
642 | kref_put(&file->async_file->ref, ib_uverbs_release_event_file); | |
bc38a6ab | 643 | |
bc38a6ab RD |
644 | kref_put(&file->ref, ib_uverbs_release_file); |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
2b8693c0 | 649 | static const struct file_operations uverbs_fops = { |
9afed76d AC |
650 | .owner = THIS_MODULE, |
651 | .write = ib_uverbs_write, | |
652 | .open = ib_uverbs_open, | |
bc38a6ab RD |
653 | .release = ib_uverbs_close |
654 | }; | |
655 | ||
2b8693c0 | 656 | static const struct file_operations uverbs_mmap_fops = { |
9afed76d AC |
657 | .owner = THIS_MODULE, |
658 | .write = ib_uverbs_write, | |
bc38a6ab | 659 | .mmap = ib_uverbs_mmap, |
9afed76d | 660 | .open = ib_uverbs_open, |
bc38a6ab RD |
661 | .release = ib_uverbs_close |
662 | }; | |
663 | ||
664 | static struct ib_client uverbs_client = { | |
665 | .name = "uverbs", | |
666 | .add = ib_uverbs_add_one, | |
667 | .remove = ib_uverbs_remove_one | |
668 | }; | |
669 | ||
f4e91eb4 TJ |
670 | static ssize_t show_ibdev(struct device *device, struct device_attribute *attr, |
671 | char *buf) | |
bc38a6ab | 672 | { |
f4e91eb4 | 673 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
674 | |
675 | if (!dev) | |
676 | return -ENODEV; | |
bc38a6ab RD |
677 | |
678 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
679 | } | |
f4e91eb4 | 680 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
bc38a6ab | 681 | |
f4e91eb4 TJ |
682 | static ssize_t show_dev_abi_version(struct device *device, |
683 | struct device_attribute *attr, char *buf) | |
274c0891 | 684 | { |
f4e91eb4 | 685 | struct ib_uverbs_device *dev = dev_get_drvdata(device); |
70a30e16 RD |
686 | |
687 | if (!dev) | |
688 | return -ENODEV; | |
274c0891 RD |
689 | |
690 | return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver); | |
691 | } | |
f4e91eb4 | 692 | static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL); |
274c0891 | 693 | |
28812fe1 AK |
694 | static ssize_t show_abi_version(struct class *class, |
695 | struct class_attribute *attr, | |
696 | char *buf) | |
bc38a6ab RD |
697 | { |
698 | return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION); | |
699 | } | |
700 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
701 | ||
6d6a0e71 AC |
702 | static dev_t overflow_maj; |
703 | static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES); | |
704 | ||
705 | /* | |
706 | * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by | |
707 | * requesting a new major number and doubling the number of max devices we | |
708 | * support. It's stupid, but simple. | |
709 | */ | |
710 | static int find_overflow_devnum(void) | |
711 | { | |
712 | int ret; | |
713 | ||
714 | if (!overflow_maj) { | |
715 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES, | |
716 | "infiniband_verbs"); | |
717 | if (ret) { | |
718 | printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n"); | |
719 | return ret; | |
720 | } | |
721 | } | |
722 | ||
723 | ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES); | |
724 | if (ret >= IB_UVERBS_MAX_DEVICES) | |
725 | return -1; | |
726 | ||
727 | return ret; | |
728 | } | |
729 | ||
bc38a6ab RD |
730 | static void ib_uverbs_add_one(struct ib_device *device) |
731 | { | |
38707980 | 732 | int devnum; |
ddbd6883 | 733 | dev_t base; |
bc38a6ab RD |
734 | struct ib_uverbs_device *uverbs_dev; |
735 | ||
736 | if (!device->alloc_ucontext) | |
737 | return; | |
738 | ||
de6eb66b | 739 | uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL); |
bc38a6ab RD |
740 | if (!uverbs_dev) |
741 | return; | |
742 | ||
70a30e16 | 743 | kref_init(&uverbs_dev->ref); |
fd60ae40 | 744 | init_completion(&uverbs_dev->comp); |
70a30e16 | 745 | |
bc38a6ab | 746 | spin_lock(&map_lock); |
38707980 AC |
747 | devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); |
748 | if (devnum >= IB_UVERBS_MAX_DEVICES) { | |
bc38a6ab | 749 | spin_unlock(&map_lock); |
6d6a0e71 AC |
750 | devnum = find_overflow_devnum(); |
751 | if (devnum < 0) | |
752 | goto err; | |
753 | ||
754 | spin_lock(&map_lock); | |
755 | uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES; | |
756 | base = devnum + overflow_maj; | |
757 | set_bit(devnum, overflow_map); | |
758 | } else { | |
759 | uverbs_dev->devnum = devnum; | |
760 | base = devnum + IB_UVERBS_BASE_DEV; | |
761 | set_bit(devnum, dev_map); | |
bc38a6ab | 762 | } |
bc38a6ab RD |
763 | spin_unlock(&map_lock); |
764 | ||
6b73597e | 765 | uverbs_dev->ib_dev = device; |
f4fd0b22 | 766 | uverbs_dev->num_comp_vectors = device->num_comp_vectors; |
bc38a6ab | 767 | |
055422dd AC |
768 | cdev_init(&uverbs_dev->cdev, NULL); |
769 | uverbs_dev->cdev.owner = THIS_MODULE; | |
770 | uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; | |
771 | kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); | |
ddbd6883 | 772 | if (cdev_add(&uverbs_dev->cdev, base, 1)) |
70a30e16 | 773 | goto err_cdev; |
bc38a6ab | 774 | |
91bd418f | 775 | uverbs_dev->dev = device_create(uverbs_class, device->dma_device, |
055422dd | 776 | uverbs_dev->cdev.dev, uverbs_dev, |
91bd418f | 777 | "uverbs%d", uverbs_dev->devnum); |
f4e91eb4 | 778 | if (IS_ERR(uverbs_dev->dev)) |
bc38a6ab RD |
779 | goto err_cdev; |
780 | ||
f4e91eb4 | 781 | if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev)) |
bc38a6ab | 782 | goto err_class; |
f4e91eb4 | 783 | if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version)) |
274c0891 | 784 | goto err_class; |
bc38a6ab RD |
785 | |
786 | ib_set_client_data(device, &uverbs_client, uverbs_dev); | |
787 | ||
788 | return; | |
789 | ||
790 | err_class: | |
055422dd | 791 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
bc38a6ab RD |
792 | |
793 | err_cdev: | |
055422dd | 794 | cdev_del(&uverbs_dev->cdev); |
6d6a0e71 AC |
795 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
796 | clear_bit(devnum, dev_map); | |
797 | else | |
798 | clear_bit(devnum, overflow_map); | |
bc38a6ab RD |
799 | |
800 | err: | |
70a30e16 | 801 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
802 | wait_for_completion(&uverbs_dev->comp); |
803 | kfree(uverbs_dev); | |
bc38a6ab RD |
804 | return; |
805 | } | |
806 | ||
807 | static void ib_uverbs_remove_one(struct ib_device *device) | |
808 | { | |
809 | struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client); | |
810 | ||
811 | if (!uverbs_dev) | |
812 | return; | |
813 | ||
f4e91eb4 | 814 | dev_set_drvdata(uverbs_dev->dev, NULL); |
055422dd AC |
815 | device_destroy(uverbs_class, uverbs_dev->cdev.dev); |
816 | cdev_del(&uverbs_dev->cdev); | |
70a30e16 | 817 | |
6d6a0e71 AC |
818 | if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES) |
819 | clear_bit(uverbs_dev->devnum, dev_map); | |
820 | else | |
821 | clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map); | |
fd60ae40 | 822 | |
70a30e16 | 823 | kref_put(&uverbs_dev->ref, ib_uverbs_release_dev); |
fd60ae40 JM |
824 | wait_for_completion(&uverbs_dev->comp); |
825 | kfree(uverbs_dev); | |
bc38a6ab RD |
826 | } |
827 | ||
bc38a6ab RD |
828 | static int __init ib_uverbs_init(void) |
829 | { | |
830 | int ret; | |
831 | ||
bc38a6ab RD |
832 | ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES, |
833 | "infiniband_verbs"); | |
834 | if (ret) { | |
835 | printk(KERN_ERR "user_verbs: couldn't register device number\n"); | |
836 | goto out; | |
837 | } | |
838 | ||
70a30e16 RD |
839 | uverbs_class = class_create(THIS_MODULE, "infiniband_verbs"); |
840 | if (IS_ERR(uverbs_class)) { | |
841 | ret = PTR_ERR(uverbs_class); | |
bc38a6ab RD |
842 | printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n"); |
843 | goto out_chrdev; | |
844 | } | |
845 | ||
70a30e16 | 846 | ret = class_create_file(uverbs_class, &class_attr_abi_version); |
bc38a6ab RD |
847 | if (ret) { |
848 | printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n"); | |
849 | goto out_class; | |
850 | } | |
851 | ||
bc38a6ab RD |
852 | ret = ib_register_client(&uverbs_client); |
853 | if (ret) { | |
854 | printk(KERN_ERR "user_verbs: couldn't register client\n"); | |
a265e558 | 855 | goto out_class; |
bc38a6ab RD |
856 | } |
857 | ||
858 | return 0; | |
859 | ||
bc38a6ab | 860 | out_class: |
70a30e16 | 861 | class_destroy(uverbs_class); |
bc38a6ab RD |
862 | |
863 | out_chrdev: | |
864 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); | |
865 | ||
866 | out: | |
867 | return ret; | |
868 | } | |
869 | ||
870 | static void __exit ib_uverbs_cleanup(void) | |
871 | { | |
872 | ib_unregister_client(&uverbs_client); | |
70a30e16 | 873 | class_destroy(uverbs_class); |
bc38a6ab | 874 | unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES); |
6d6a0e71 AC |
875 | if (overflow_maj) |
876 | unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES); | |
5d7edb3c RD |
877 | idr_destroy(&ib_uverbs_pd_idr); |
878 | idr_destroy(&ib_uverbs_mr_idr); | |
879 | idr_destroy(&ib_uverbs_mw_idr); | |
880 | idr_destroy(&ib_uverbs_ah_idr); | |
881 | idr_destroy(&ib_uverbs_cq_idr); | |
882 | idr_destroy(&ib_uverbs_qp_idr); | |
883 | idr_destroy(&ib_uverbs_srq_idr); | |
bc38a6ab RD |
884 | } |
885 | ||
886 | module_init(ib_uverbs_init); | |
887 | module_exit(ib_uverbs_cleanup); |