Commit | Line | Data |
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a5b74540 HR |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
b9ef520f | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
a5b74540 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | * | |
6a9af2e1 | 33 | * $Id: ucm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
a5b74540 | 34 | */ |
1b52fa98 SH |
35 | |
36 | #include <linux/completion.h> | |
a5b74540 HR |
37 | #include <linux/init.h> |
38 | #include <linux/fs.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/device.h> | |
41 | #include <linux/err.h> | |
42 | #include <linux/poll.h> | |
43 | #include <linux/file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/cdev.h> | |
595e726a | 46 | #include <linux/idr.h> |
95ed644f | 47 | #include <linux/mutex.h> |
a5b74540 HR |
48 | |
49 | #include <asm/uaccess.h> | |
50 | ||
595e726a SH |
51 | #include <rdma/ib_cm.h> |
52 | #include <rdma/ib_user_cm.h> | |
6a9af2e1 | 53 | #include <rdma/ib_marshall.h> |
a5b74540 HR |
54 | |
55 | MODULE_AUTHOR("Libor Michalek"); | |
56 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
07d357d0 SH |
59 | struct ib_ucm_device { |
60 | int devnum; | |
61 | struct cdev dev; | |
62 | struct class_device class_dev; | |
63 | struct ib_device *ib_dev; | |
64 | }; | |
65 | ||
595e726a SH |
66 | struct ib_ucm_file { |
67 | struct semaphore mutex; | |
68 | struct file *filp; | |
07d357d0 | 69 | struct ib_ucm_device *device; |
79d81907 | 70 | |
07d357d0 SH |
71 | struct list_head ctxs; |
72 | struct list_head events; | |
595e726a SH |
73 | wait_queue_head_t poll_wait; |
74 | }; | |
75 | ||
76 | struct ib_ucm_context { | |
77 | int id; | |
1b52fa98 | 78 | struct completion comp; |
595e726a SH |
79 | atomic_t ref; |
80 | int events_reported; | |
81 | ||
82 | struct ib_ucm_file *file; | |
83 | struct ib_cm_id *cm_id; | |
84 | __u64 uid; | |
85 | ||
86 | struct list_head events; /* list of pending events. */ | |
87 | struct list_head file_list; /* member in file ctx list */ | |
88 | }; | |
89 | ||
90 | struct ib_ucm_event { | |
91 | struct ib_ucm_context *ctx; | |
92 | struct list_head file_list; /* member in file event list */ | |
93 | struct list_head ctx_list; /* member in ctx event list */ | |
94 | ||
95 | struct ib_cm_id *cm_id; | |
96 | struct ib_ucm_event_resp resp; | |
97 | void *data; | |
98 | void *info; | |
99 | int data_len; | |
100 | int info_len; | |
101 | }; | |
79d81907 | 102 | |
a5b74540 HR |
103 | enum { |
104 | IB_UCM_MAJOR = 231, | |
07d357d0 SH |
105 | IB_UCM_BASE_MINOR = 224, |
106 | IB_UCM_MAX_DEVICES = 32 | |
a5b74540 HR |
107 | }; |
108 | ||
07d357d0 | 109 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 110 | |
07d357d0 SH |
111 | static void ib_ucm_add_one(struct ib_device *device); |
112 | static void ib_ucm_remove_one(struct ib_device *device); | |
a5b74540 | 113 | |
07d357d0 SH |
114 | static struct ib_client ucm_client = { |
115 | .name = "ucm", | |
116 | .add = ib_ucm_add_one, | |
117 | .remove = ib_ucm_remove_one | |
118 | }; | |
119 | ||
95ed644f | 120 | static DEFINE_MUTEX(ctx_id_mutex); |
762a03e2 | 121 | static DEFINE_IDR(ctx_id_table); |
07d357d0 | 122 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 123 | |
b9ef520f | 124 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
125 | { |
126 | struct ib_ucm_context *ctx; | |
127 | ||
95ed644f | 128 | mutex_lock(&ctx_id_mutex); |
a5b74540 | 129 | ctx = idr_find(&ctx_id_table, id); |
b9ef520f SH |
130 | if (!ctx) |
131 | ctx = ERR_PTR(-ENOENT); | |
132 | else if (ctx->file != file) | |
133 | ctx = ERR_PTR(-EINVAL); | |
134 | else | |
135 | atomic_inc(&ctx->ref); | |
95ed644f | 136 | mutex_unlock(&ctx_id_mutex); |
a5b74540 HR |
137 | |
138 | return ctx; | |
139 | } | |
140 | ||
141 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
142 | { | |
b9ef520f | 143 | if (atomic_dec_and_test(&ctx->ref)) |
1b52fa98 | 144 | complete(&ctx->comp); |
b9ef520f SH |
145 | } |
146 | ||
0b2b35f6 | 147 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 148 | { |
0b2b35f6 SH |
149 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
150 | } | |
b9ef520f | 151 | |
0b2b35f6 SH |
152 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
153 | { | |
154 | struct ib_ucm_event *uevent; | |
a5b74540 | 155 | |
0b2b35f6 | 156 | down(&ctx->file->mutex); |
a5b74540 HR |
157 | list_del(&ctx->file_list); |
158 | while (!list_empty(&ctx->events)) { | |
159 | ||
160 | uevent = list_entry(ctx->events.next, | |
161 | struct ib_ucm_event, ctx_list); | |
162 | list_del(&uevent->file_list); | |
163 | list_del(&uevent->ctx_list); | |
164 | ||
165 | /* clear incoming connections. */ | |
0b2b35f6 | 166 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
167 | ib_destroy_cm_id(uevent->cm_id); |
168 | ||
169 | kfree(uevent); | |
170 | } | |
0b2b35f6 | 171 | up(&ctx->file->mutex); |
a5b74540 HR |
172 | } |
173 | ||
174 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
175 | { | |
176 | struct ib_ucm_context *ctx; | |
177 | int result; | |
178 | ||
de6eb66b | 179 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
180 | if (!ctx) |
181 | return NULL; | |
182 | ||
b9ef520f | 183 | atomic_set(&ctx->ref, 1); |
1b52fa98 | 184 | init_completion(&ctx->comp); |
a5b74540 | 185 | ctx->file = file; |
a5b74540 | 186 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 187 | |
0b2b35f6 SH |
188 | do { |
189 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
190 | if (!result) | |
191 | goto error; | |
a5b74540 | 192 | |
95ed644f | 193 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 194 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); |
95ed644f | 195 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 196 | } while (result == -EAGAIN); |
a5b74540 | 197 | |
a5b74540 HR |
198 | if (result) |
199 | goto error; | |
200 | ||
0b2b35f6 | 201 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 202 | return ctx; |
0b2b35f6 | 203 | |
a5b74540 | 204 | error: |
a5b74540 | 205 | kfree(ctx); |
a5b74540 HR |
206 | return NULL; |
207 | } | |
07d357d0 | 208 | |
0b2b35f6 | 209 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
210 | struct ib_cm_req_event_param *kreq) |
211 | { | |
a5b74540 HR |
212 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
213 | ureq->remote_qkey = kreq->remote_qkey; | |
214 | ureq->remote_qpn = kreq->remote_qpn; | |
215 | ureq->qp_type = kreq->qp_type; | |
216 | ureq->starting_psn = kreq->starting_psn; | |
217 | ureq->responder_resources = kreq->responder_resources; | |
218 | ureq->initiator_depth = kreq->initiator_depth; | |
219 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
220 | ureq->flow_control = kreq->flow_control; | |
221 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
222 | ureq->retry_count = kreq->retry_count; | |
223 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
224 | ureq->srq = kreq->srq; | |
07d357d0 | 225 | ureq->port = kreq->port; |
a5b74540 | 226 | |
6a9af2e1 SH |
227 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
228 | if (kreq->alternate_path) | |
229 | ib_copy_path_rec_to_user(&ureq->alternate_path, | |
230 | kreq->alternate_path); | |
a5b74540 HR |
231 | } |
232 | ||
233 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
234 | struct ib_cm_rep_event_param *krep) | |
235 | { | |
236 | urep->remote_ca_guid = krep->remote_ca_guid; | |
237 | urep->remote_qkey = krep->remote_qkey; | |
238 | urep->remote_qpn = krep->remote_qpn; | |
239 | urep->starting_psn = krep->starting_psn; | |
240 | urep->responder_resources = krep->responder_resources; | |
241 | urep->initiator_depth = krep->initiator_depth; | |
242 | urep->target_ack_delay = krep->target_ack_delay; | |
243 | urep->failover_accepted = krep->failover_accepted; | |
244 | urep->flow_control = krep->flow_control; | |
245 | urep->rnr_retry_count = krep->rnr_retry_count; | |
246 | urep->srq = krep->srq; | |
247 | } | |
248 | ||
a5b74540 HR |
249 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
250 | struct ib_cm_sidr_rep_event_param *krep) | |
251 | { | |
252 | urep->status = krep->status; | |
253 | urep->qkey = krep->qkey; | |
254 | urep->qpn = krep->qpn; | |
255 | }; | |
256 | ||
0b2b35f6 | 257 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
258 | struct ib_ucm_event *uvt) |
259 | { | |
260 | void *info = NULL; | |
a5b74540 HR |
261 | |
262 | switch (evt->event) { | |
263 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 264 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
265 | &evt->param.req_rcvd); |
266 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 267 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
268 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
269 | IB_UCM_PRES_ALTERNATE : 0); | |
270 | break; | |
271 | case IB_CM_REP_RECEIVED: | |
272 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
273 | &evt->param.rep_rcvd); | |
274 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
275 | break; |
276 | case IB_CM_RTU_RECEIVED: | |
277 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
278 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
279 | break; |
280 | case IB_CM_DREQ_RECEIVED: | |
281 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
282 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
283 | break; |
284 | case IB_CM_DREP_RECEIVED: | |
285 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
286 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
287 | break; |
288 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
289 | uvt->resp.u.mra_resp.timeout = |
290 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 291 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
292 | break; |
293 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 294 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
295 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
296 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
297 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
298 | break; |
299 | case IB_CM_LAP_RECEIVED: | |
6a9af2e1 SH |
300 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
301 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 302 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 303 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
304 | break; |
305 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 306 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
307 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
308 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
309 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
310 | break; |
311 | case IB_CM_SIDR_REQ_RECEIVED: | |
0b2b35f6 SH |
312 | uvt->resp.u.sidr_req_resp.pkey = |
313 | evt->param.sidr_req_rcvd.pkey; | |
07d357d0 SH |
314 | uvt->resp.u.sidr_req_resp.port = |
315 | evt->param.sidr_req_rcvd.port; | |
a5b74540 | 316 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
317 | break; |
318 | case IB_CM_SIDR_REP_RECEIVED: | |
319 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
320 | &evt->param.sidr_rep_rcvd); | |
321 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
322 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
323 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
324 | break; |
325 | default: | |
326 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
327 | break; |
328 | } | |
329 | ||
b9ef520f | 330 | if (uvt->data_len) { |
a5b74540 | 331 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
332 | if (!uvt->data) |
333 | goto err1; | |
a5b74540 HR |
334 | |
335 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
336 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
337 | } | |
338 | ||
b9ef520f | 339 | if (uvt->info_len) { |
a5b74540 | 340 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
341 | if (!uvt->info) |
342 | goto err2; | |
a5b74540 HR |
343 | |
344 | memcpy(uvt->info, info, uvt->info_len); | |
345 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
346 | } | |
a5b74540 | 347 | return 0; |
b9ef520f SH |
348 | |
349 | err2: | |
79d81907 | 350 | kfree(uvt->data); |
b9ef520f SH |
351 | err1: |
352 | return -ENOMEM; | |
a5b74540 HR |
353 | } |
354 | ||
355 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
356 | struct ib_cm_event *event) | |
357 | { | |
358 | struct ib_ucm_event *uevent; | |
359 | struct ib_ucm_context *ctx; | |
360 | int result = 0; | |
a5b74540 | 361 | |
b9ef520f | 362 | ctx = cm_id->context; |
a5b74540 | 363 | |
de6eb66b | 364 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
365 | if (!uevent) |
366 | goto err1; | |
a5b74540 | 367 | |
0b2b35f6 SH |
368 | uevent->ctx = ctx; |
369 | uevent->cm_id = cm_id; | |
370 | uevent->resp.uid = ctx->uid; | |
371 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
372 | uevent->resp.event = event->event; |
373 | ||
0b2b35f6 | 374 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 375 | if (result) |
b9ef520f | 376 | goto err2; |
a5b74540 | 377 | |
a5b74540 | 378 | down(&ctx->file->mutex); |
a5b74540 HR |
379 | list_add_tail(&uevent->file_list, &ctx->file->events); |
380 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 381 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 382 | up(&ctx->file->mutex); |
b9ef520f SH |
383 | return 0; |
384 | ||
385 | err2: | |
386 | kfree(uevent); | |
387 | err1: | |
388 | /* Destroy new cm_id's */ | |
0b2b35f6 | 389 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
390 | } |
391 | ||
392 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
393 | const char __user *inbuf, | |
394 | int in_len, int out_len) | |
395 | { | |
396 | struct ib_ucm_context *ctx; | |
397 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 398 | struct ib_ucm_event *uevent; |
a5b74540 HR |
399 | int result = 0; |
400 | DEFINE_WAIT(wait); | |
401 | ||
402 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
403 | return -ENOSPC; | |
404 | ||
405 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
406 | return -EFAULT; | |
07d357d0 | 407 | |
a5b74540 | 408 | down(&file->mutex); |
a5b74540 HR |
409 | while (list_empty(&file->events)) { |
410 | ||
411 | if (file->filp->f_flags & O_NONBLOCK) { | |
412 | result = -EAGAIN; | |
413 | break; | |
414 | } | |
415 | ||
416 | if (signal_pending(current)) { | |
417 | result = -ERESTARTSYS; | |
418 | break; | |
419 | } | |
420 | ||
421 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
422 | ||
423 | up(&file->mutex); | |
424 | schedule(); | |
425 | down(&file->mutex); | |
426 | ||
427 | finish_wait(&file->poll_wait, &wait); | |
428 | } | |
429 | ||
430 | if (result) | |
431 | goto done; | |
432 | ||
433 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
434 | ||
0b2b35f6 SH |
435 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
436 | ctx = ib_ucm_ctx_alloc(file); | |
437 | if (!ctx) { | |
438 | result = -ENOMEM; | |
439 | goto done; | |
440 | } | |
a5b74540 | 441 | |
0b2b35f6 SH |
442 | ctx->cm_id = uevent->cm_id; |
443 | ctx->cm_id->context = ctx; | |
444 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
445 | } |
446 | ||
a5b74540 HR |
447 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
448 | &uevent->resp, sizeof(uevent->resp))) { | |
449 | result = -EFAULT; | |
450 | goto done; | |
451 | } | |
452 | ||
453 | if (uevent->data) { | |
a5b74540 HR |
454 | if (cmd.data_len < uevent->data_len) { |
455 | result = -ENOMEM; | |
456 | goto done; | |
457 | } | |
a5b74540 HR |
458 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
459 | uevent->data, uevent->data_len)) { | |
460 | result = -EFAULT; | |
461 | goto done; | |
462 | } | |
463 | } | |
464 | ||
465 | if (uevent->info) { | |
a5b74540 HR |
466 | if (cmd.info_len < uevent->info_len) { |
467 | result = -ENOMEM; | |
468 | goto done; | |
469 | } | |
a5b74540 HR |
470 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
471 | uevent->info, uevent->info_len)) { | |
472 | result = -EFAULT; | |
473 | goto done; | |
474 | } | |
475 | } | |
476 | ||
477 | list_del(&uevent->file_list); | |
478 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 479 | uevent->ctx->events_reported++; |
a5b74540 | 480 | |
79d81907 HR |
481 | kfree(uevent->data); |
482 | kfree(uevent->info); | |
a5b74540 HR |
483 | kfree(uevent); |
484 | done: | |
485 | up(&file->mutex); | |
486 | return result; | |
487 | } | |
488 | ||
a5b74540 HR |
489 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
490 | const char __user *inbuf, | |
491 | int in_len, int out_len) | |
492 | { | |
493 | struct ib_ucm_create_id cmd; | |
494 | struct ib_ucm_create_id_resp resp; | |
495 | struct ib_ucm_context *ctx; | |
496 | int result; | |
497 | ||
498 | if (out_len < sizeof(resp)) | |
499 | return -ENOSPC; | |
500 | ||
501 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
502 | return -EFAULT; | |
503 | ||
b9ef520f | 504 | down(&file->mutex); |
a5b74540 | 505 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 506 | up(&file->mutex); |
a5b74540 HR |
507 | if (!ctx) |
508 | return -ENOMEM; | |
509 | ||
0b2b35f6 | 510 | ctx->uid = cmd.uid; |
07d357d0 SH |
511 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
512 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
513 | if (IS_ERR(ctx->cm_id)) { |
514 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 515 | goto err1; |
a5b74540 HR |
516 | } |
517 | ||
518 | resp.id = ctx->id; | |
519 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
520 | &resp, sizeof(resp))) { | |
521 | result = -EFAULT; | |
07d357d0 | 522 | goto err2; |
a5b74540 | 523 | } |
a5b74540 | 524 | return 0; |
a5b74540 | 525 | |
07d357d0 SH |
526 | err2: |
527 | ib_destroy_cm_id(ctx->cm_id); | |
528 | err1: | |
95ed644f | 529 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 530 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 531 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 532 | kfree(ctx); |
a5b74540 HR |
533 | return result; |
534 | } | |
535 | ||
536 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
537 | const char __user *inbuf, | |
538 | int in_len, int out_len) | |
539 | { | |
540 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
541 | struct ib_ucm_destroy_id_resp resp; |
542 | struct ib_ucm_context *ctx; | |
543 | int result = 0; | |
544 | ||
545 | if (out_len < sizeof(resp)) | |
546 | return -ENOSPC; | |
a5b74540 HR |
547 | |
548 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
549 | return -EFAULT; | |
550 | ||
95ed644f | 551 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
552 | ctx = idr_find(&ctx_id_table, cmd.id); |
553 | if (!ctx) | |
554 | ctx = ERR_PTR(-ENOENT); | |
555 | else if (ctx->file != file) | |
556 | ctx = ERR_PTR(-EINVAL); | |
557 | else | |
558 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 559 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
560 | |
561 | if (IS_ERR(ctx)) | |
562 | return PTR_ERR(ctx); | |
563 | ||
1b52fa98 SH |
564 | ib_ucm_ctx_put(ctx); |
565 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
566 | |
567 | /* No new events will be generated after destroying the cm_id. */ | |
568 | ib_destroy_cm_id(ctx->cm_id); | |
569 | /* Cleanup events not yet reported to the user. */ | |
570 | ib_ucm_cleanup_events(ctx); | |
571 | ||
572 | resp.events_reported = ctx->events_reported; | |
573 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
574 | &resp, sizeof(resp))) | |
575 | result = -EFAULT; | |
576 | ||
577 | kfree(ctx); | |
578 | return result; | |
a5b74540 HR |
579 | } |
580 | ||
581 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
582 | const char __user *inbuf, | |
583 | int in_len, int out_len) | |
584 | { | |
585 | struct ib_ucm_attr_id_resp resp; | |
586 | struct ib_ucm_attr_id cmd; | |
587 | struct ib_ucm_context *ctx; | |
588 | int result = 0; | |
589 | ||
590 | if (out_len < sizeof(resp)) | |
591 | return -ENOSPC; | |
592 | ||
593 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
594 | return -EFAULT; | |
595 | ||
b9ef520f SH |
596 | ctx = ib_ucm_ctx_get(file, cmd.id); |
597 | if (IS_ERR(ctx)) | |
598 | return PTR_ERR(ctx); | |
a5b74540 HR |
599 | |
600 | resp.service_id = ctx->cm_id->service_id; | |
601 | resp.service_mask = ctx->cm_id->service_mask; | |
602 | resp.local_id = ctx->cm_id->local_id; | |
603 | resp.remote_id = ctx->cm_id->remote_id; | |
604 | ||
605 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
606 | &resp, sizeof(resp))) | |
607 | result = -EFAULT; | |
608 | ||
b9ef520f | 609 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
610 | return result; |
611 | } | |
612 | ||
0b2b35f6 SH |
613 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
614 | const char __user *inbuf, | |
615 | int in_len, int out_len) | |
616 | { | |
6a9af2e1 | 617 | struct ib_uverbs_qp_attr resp; |
0b2b35f6 SH |
618 | struct ib_ucm_init_qp_attr cmd; |
619 | struct ib_ucm_context *ctx; | |
620 | struct ib_qp_attr qp_attr; | |
621 | int result = 0; | |
622 | ||
623 | if (out_len < sizeof(resp)) | |
624 | return -ENOSPC; | |
625 | ||
626 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
627 | return -EFAULT; | |
628 | ||
629 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
630 | if (IS_ERR(ctx)) | |
631 | return PTR_ERR(ctx); | |
632 | ||
633 | resp.qp_attr_mask = 0; | |
634 | memset(&qp_attr, 0, sizeof qp_attr); | |
635 | qp_attr.qp_state = cmd.qp_state; | |
636 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
637 | if (result) | |
638 | goto out; | |
639 | ||
6a9af2e1 | 640 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
0b2b35f6 SH |
641 | |
642 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
643 | &resp, sizeof(resp))) | |
644 | result = -EFAULT; | |
645 | ||
646 | out: | |
647 | ib_ucm_ctx_put(ctx); | |
648 | return result; | |
649 | } | |
650 | ||
a5b74540 HR |
651 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
652 | const char __user *inbuf, | |
653 | int in_len, int out_len) | |
654 | { | |
655 | struct ib_ucm_listen cmd; | |
656 | struct ib_ucm_context *ctx; | |
657 | int result; | |
658 | ||
659 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
660 | return -EFAULT; | |
661 | ||
b9ef520f SH |
662 | ctx = ib_ucm_ctx_get(file, cmd.id); |
663 | if (IS_ERR(ctx)) | |
664 | return PTR_ERR(ctx); | |
a5b74540 | 665 | |
b9ef520f SH |
666 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
667 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
668 | return result; |
669 | } | |
670 | ||
671 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
672 | const char __user *inbuf, | |
673 | int in_len, int out_len) | |
674 | { | |
675 | struct ib_ucm_establish cmd; | |
676 | struct ib_ucm_context *ctx; | |
677 | int result; | |
678 | ||
679 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
680 | return -EFAULT; | |
681 | ||
b9ef520f SH |
682 | ctx = ib_ucm_ctx_get(file, cmd.id); |
683 | if (IS_ERR(ctx)) | |
684 | return PTR_ERR(ctx); | |
a5b74540 | 685 | |
b9ef520f SH |
686 | result = ib_cm_establish(ctx->cm_id); |
687 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
688 | return result; |
689 | } | |
690 | ||
691 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
692 | { | |
693 | void *data; | |
694 | ||
695 | *dest = NULL; | |
696 | ||
697 | if (!len) | |
698 | return 0; | |
699 | ||
700 | data = kmalloc(len, GFP_KERNEL); | |
701 | if (!data) | |
702 | return -ENOMEM; | |
703 | ||
704 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
705 | kfree(data); | |
706 | return -EFAULT; | |
707 | } | |
708 | ||
709 | *dest = data; | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
714 | { | |
6a9af2e1 | 715 | struct ib_user_path_rec upath; |
a5b74540 HR |
716 | struct ib_sa_path_rec *sa_path; |
717 | ||
718 | *path = NULL; | |
719 | ||
720 | if (!src) | |
721 | return 0; | |
722 | ||
723 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
724 | if (!sa_path) | |
725 | return -ENOMEM; | |
726 | ||
6a9af2e1 SH |
727 | if (copy_from_user(&upath, (void __user *)(unsigned long)src, |
728 | sizeof(upath))) { | |
a5b74540 HR |
729 | |
730 | kfree(sa_path); | |
731 | return -EFAULT; | |
732 | } | |
733 | ||
6a9af2e1 | 734 | ib_copy_path_rec_from_user(sa_path, &upath); |
a5b74540 HR |
735 | *path = sa_path; |
736 | return 0; | |
737 | } | |
738 | ||
739 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
740 | const char __user *inbuf, | |
741 | int in_len, int out_len) | |
742 | { | |
743 | struct ib_cm_req_param param; | |
744 | struct ib_ucm_context *ctx; | |
745 | struct ib_ucm_req cmd; | |
746 | int result; | |
747 | ||
748 | param.private_data = NULL; | |
749 | param.primary_path = NULL; | |
750 | param.alternate_path = NULL; | |
751 | ||
752 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
753 | return -EFAULT; | |
754 | ||
755 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
756 | if (result) | |
757 | goto done; | |
758 | ||
759 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
760 | if (result) | |
761 | goto done; | |
762 | ||
763 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
764 | if (result) | |
765 | goto done; | |
766 | ||
767 | param.private_data_len = cmd.len; | |
768 | param.service_id = cmd.sid; | |
769 | param.qp_num = cmd.qpn; | |
770 | param.qp_type = cmd.qp_type; | |
771 | param.starting_psn = cmd.psn; | |
772 | param.peer_to_peer = cmd.peer_to_peer; | |
773 | param.responder_resources = cmd.responder_resources; | |
774 | param.initiator_depth = cmd.initiator_depth; | |
775 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
776 | param.flow_control = cmd.flow_control; | |
777 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
778 | param.retry_count = cmd.retry_count; | |
779 | param.rnr_retry_count = cmd.rnr_retry_count; | |
780 | param.max_cm_retries = cmd.max_cm_retries; | |
781 | param.srq = cmd.srq; | |
782 | ||
b9ef520f SH |
783 | ctx = ib_ucm_ctx_get(file, cmd.id); |
784 | if (!IS_ERR(ctx)) { | |
a5b74540 | 785 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
786 | ib_ucm_ctx_put(ctx); |
787 | } else | |
788 | result = PTR_ERR(ctx); | |
a5b74540 | 789 | |
a5b74540 | 790 | done: |
79d81907 HR |
791 | kfree(param.private_data); |
792 | kfree(param.primary_path); | |
793 | kfree(param.alternate_path); | |
a5b74540 HR |
794 | return result; |
795 | } | |
796 | ||
797 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
798 | const char __user *inbuf, | |
799 | int in_len, int out_len) | |
800 | { | |
801 | struct ib_cm_rep_param param; | |
802 | struct ib_ucm_context *ctx; | |
803 | struct ib_ucm_rep cmd; | |
804 | int result; | |
805 | ||
806 | param.private_data = NULL; | |
807 | ||
808 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
809 | return -EFAULT; | |
810 | ||
811 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
812 | if (result) | |
813 | return result; | |
814 | ||
815 | param.qp_num = cmd.qpn; | |
816 | param.starting_psn = cmd.psn; | |
817 | param.private_data_len = cmd.len; | |
818 | param.responder_resources = cmd.responder_resources; | |
819 | param.initiator_depth = cmd.initiator_depth; | |
820 | param.target_ack_delay = cmd.target_ack_delay; | |
821 | param.failover_accepted = cmd.failover_accepted; | |
822 | param.flow_control = cmd.flow_control; | |
823 | param.rnr_retry_count = cmd.rnr_retry_count; | |
824 | param.srq = cmd.srq; | |
825 | ||
b9ef520f SH |
826 | ctx = ib_ucm_ctx_get(file, cmd.id); |
827 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 828 | ctx->uid = cmd.uid; |
a5b74540 | 829 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
830 | ib_ucm_ctx_put(ctx); |
831 | } else | |
832 | result = PTR_ERR(ctx); | |
a5b74540 | 833 | |
79d81907 | 834 | kfree(param.private_data); |
a5b74540 HR |
835 | return result; |
836 | } | |
837 | ||
838 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
839 | const char __user *inbuf, int in_len, | |
840 | int (*func)(struct ib_cm_id *cm_id, | |
841 | const void *private_data, | |
842 | u8 private_data_len)) | |
843 | { | |
844 | struct ib_ucm_private_data cmd; | |
845 | struct ib_ucm_context *ctx; | |
846 | const void *private_data = NULL; | |
847 | int result; | |
848 | ||
849 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
850 | return -EFAULT; | |
851 | ||
852 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
853 | if (result) | |
854 | return result; | |
855 | ||
b9ef520f SH |
856 | ctx = ib_ucm_ctx_get(file, cmd.id); |
857 | if (!IS_ERR(ctx)) { | |
a5b74540 | 858 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
859 | ib_ucm_ctx_put(ctx); |
860 | } else | |
861 | result = PTR_ERR(ctx); | |
a5b74540 | 862 | |
79d81907 | 863 | kfree(private_data); |
a5b74540 HR |
864 | return result; |
865 | } | |
866 | ||
867 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
868 | const char __user *inbuf, | |
869 | int in_len, int out_len) | |
870 | { | |
871 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
872 | } | |
873 | ||
874 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
875 | const char __user *inbuf, | |
876 | int in_len, int out_len) | |
877 | { | |
878 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
879 | } | |
880 | ||
881 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
882 | const char __user *inbuf, | |
883 | int in_len, int out_len) | |
884 | { | |
885 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
886 | } | |
887 | ||
888 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
889 | const char __user *inbuf, int in_len, | |
890 | int (*func)(struct ib_cm_id *cm_id, | |
891 | int status, | |
892 | const void *info, | |
893 | u8 info_len, | |
894 | const void *data, | |
895 | u8 data_len)) | |
896 | { | |
897 | struct ib_ucm_context *ctx; | |
898 | struct ib_ucm_info cmd; | |
899 | const void *data = NULL; | |
900 | const void *info = NULL; | |
901 | int result; | |
902 | ||
903 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
904 | return -EFAULT; | |
905 | ||
906 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
907 | if (result) | |
908 | goto done; | |
909 | ||
910 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
911 | if (result) | |
912 | goto done; | |
913 | ||
b9ef520f SH |
914 | ctx = ib_ucm_ctx_get(file, cmd.id); |
915 | if (!IS_ERR(ctx)) { | |
916 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 917 | data, cmd.data_len); |
b9ef520f SH |
918 | ib_ucm_ctx_put(ctx); |
919 | } else | |
920 | result = PTR_ERR(ctx); | |
a5b74540 | 921 | |
a5b74540 | 922 | done: |
79d81907 HR |
923 | kfree(data); |
924 | kfree(info); | |
a5b74540 HR |
925 | return result; |
926 | } | |
927 | ||
928 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
929 | const char __user *inbuf, | |
930 | int in_len, int out_len) | |
931 | { | |
932 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
933 | } | |
934 | ||
935 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
936 | const char __user *inbuf, | |
937 | int in_len, int out_len) | |
938 | { | |
939 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
940 | } | |
941 | ||
942 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
943 | const char __user *inbuf, | |
944 | int in_len, int out_len) | |
945 | { | |
946 | struct ib_ucm_context *ctx; | |
947 | struct ib_ucm_mra cmd; | |
948 | const void *data = NULL; | |
949 | int result; | |
950 | ||
951 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
952 | return -EFAULT; | |
953 | ||
954 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
955 | if (result) | |
956 | return result; | |
957 | ||
b9ef520f SH |
958 | ctx = ib_ucm_ctx_get(file, cmd.id); |
959 | if (!IS_ERR(ctx)) { | |
960 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
961 | ib_ucm_ctx_put(ctx); | |
962 | } else | |
963 | result = PTR_ERR(ctx); | |
a5b74540 | 964 | |
79d81907 | 965 | kfree(data); |
a5b74540 HR |
966 | return result; |
967 | } | |
968 | ||
969 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
970 | const char __user *inbuf, | |
971 | int in_len, int out_len) | |
972 | { | |
973 | struct ib_ucm_context *ctx; | |
974 | struct ib_sa_path_rec *path = NULL; | |
975 | struct ib_ucm_lap cmd; | |
976 | const void *data = NULL; | |
977 | int result; | |
978 | ||
979 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
980 | return -EFAULT; | |
981 | ||
982 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
983 | if (result) | |
984 | goto done; | |
985 | ||
986 | result = ib_ucm_path_get(&path, cmd.path); | |
987 | if (result) | |
988 | goto done; | |
989 | ||
b9ef520f SH |
990 | ctx = ib_ucm_ctx_get(file, cmd.id); |
991 | if (!IS_ERR(ctx)) { | |
a5b74540 | 992 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
993 | ib_ucm_ctx_put(ctx); |
994 | } else | |
995 | result = PTR_ERR(ctx); | |
a5b74540 | 996 | |
a5b74540 | 997 | done: |
79d81907 HR |
998 | kfree(data); |
999 | kfree(path); | |
a5b74540 HR |
1000 | return result; |
1001 | } | |
1002 | ||
1003 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1004 | const char __user *inbuf, | |
1005 | int in_len, int out_len) | |
1006 | { | |
1007 | struct ib_cm_sidr_req_param param; | |
1008 | struct ib_ucm_context *ctx; | |
1009 | struct ib_ucm_sidr_req cmd; | |
1010 | int result; | |
1011 | ||
1012 | param.private_data = NULL; | |
1013 | param.path = NULL; | |
1014 | ||
1015 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1016 | return -EFAULT; | |
1017 | ||
1018 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1019 | if (result) | |
1020 | goto done; | |
1021 | ||
1022 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1023 | if (result) | |
1024 | goto done; | |
1025 | ||
1026 | param.private_data_len = cmd.len; | |
1027 | param.service_id = cmd.sid; | |
1028 | param.timeout_ms = cmd.timeout; | |
1029 | param.max_cm_retries = cmd.max_cm_retries; | |
1030 | param.pkey = cmd.pkey; | |
1031 | ||
b9ef520f SH |
1032 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1033 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1034 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1035 | ib_ucm_ctx_put(ctx); |
1036 | } else | |
1037 | result = PTR_ERR(ctx); | |
a5b74540 | 1038 | |
a5b74540 | 1039 | done: |
79d81907 HR |
1040 | kfree(param.private_data); |
1041 | kfree(param.path); | |
a5b74540 HR |
1042 | return result; |
1043 | } | |
1044 | ||
1045 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1046 | const char __user *inbuf, | |
1047 | int in_len, int out_len) | |
1048 | { | |
1049 | struct ib_cm_sidr_rep_param param; | |
1050 | struct ib_ucm_sidr_rep cmd; | |
1051 | struct ib_ucm_context *ctx; | |
1052 | int result; | |
1053 | ||
1054 | param.info = NULL; | |
1055 | ||
1056 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1057 | return -EFAULT; | |
1058 | ||
1059 | result = ib_ucm_alloc_data(¶m.private_data, | |
1060 | cmd.data, cmd.data_len); | |
1061 | if (result) | |
1062 | goto done; | |
1063 | ||
1064 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1065 | if (result) | |
1066 | goto done; | |
1067 | ||
b9ef520f SH |
1068 | param.qp_num = cmd.qpn; |
1069 | param.qkey = cmd.qkey; | |
1070 | param.status = cmd.status; | |
1071 | param.info_length = cmd.info_len; | |
1072 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1073 | |
b9ef520f SH |
1074 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1075 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1076 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1077 | ib_ucm_ctx_put(ctx); |
1078 | } else | |
1079 | result = PTR_ERR(ctx); | |
a5b74540 | 1080 | |
a5b74540 | 1081 | done: |
79d81907 HR |
1082 | kfree(param.private_data); |
1083 | kfree(param.info); | |
a5b74540 HR |
1084 | return result; |
1085 | } | |
1086 | ||
1087 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1088 | const char __user *inbuf, | |
1089 | int in_len, int out_len) = { | |
1090 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1091 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1092 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1093 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1094 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1095 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1096 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1097 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1098 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1099 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1100 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1101 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1102 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1103 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1104 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1105 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1106 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1107 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1108 | }; |
1109 | ||
1110 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1111 | size_t len, loff_t *pos) | |
1112 | { | |
1113 | struct ib_ucm_file *file = filp->private_data; | |
1114 | struct ib_ucm_cmd_hdr hdr; | |
1115 | ssize_t result; | |
1116 | ||
1117 | if (len < sizeof(hdr)) | |
1118 | return -EINVAL; | |
1119 | ||
1120 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1121 | return -EFAULT; | |
1122 | ||
a5b74540 HR |
1123 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
1124 | return -EINVAL; | |
1125 | ||
1126 | if (hdr.in + sizeof(hdr) > len) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1130 | hdr.in, hdr.out); | |
1131 | if (!result) | |
1132 | result = len; | |
1133 | ||
1134 | return result; | |
1135 | } | |
1136 | ||
1137 | static unsigned int ib_ucm_poll(struct file *filp, | |
1138 | struct poll_table_struct *wait) | |
1139 | { | |
1140 | struct ib_ucm_file *file = filp->private_data; | |
1141 | unsigned int mask = 0; | |
1142 | ||
1143 | poll_wait(filp, &file->poll_wait, wait); | |
1144 | ||
1145 | if (!list_empty(&file->events)) | |
1146 | mask = POLLIN | POLLRDNORM; | |
1147 | ||
1148 | return mask; | |
1149 | } | |
1150 | ||
1151 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1152 | { | |
1153 | struct ib_ucm_file *file; | |
1154 | ||
1155 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1156 | if (!file) | |
1157 | return -ENOMEM; | |
1158 | ||
1159 | INIT_LIST_HEAD(&file->events); | |
1160 | INIT_LIST_HEAD(&file->ctxs); | |
1161 | init_waitqueue_head(&file->poll_wait); | |
1162 | ||
1163 | init_MUTEX(&file->mutex); | |
1164 | ||
1165 | filp->private_data = file; | |
1166 | file->filp = filp; | |
07d357d0 | 1167 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev); |
a5b74540 | 1168 | |
a5b74540 HR |
1169 | return 0; |
1170 | } | |
1171 | ||
1172 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1173 | { | |
1174 | struct ib_ucm_file *file = filp->private_data; | |
1175 | struct ib_ucm_context *ctx; | |
1176 | ||
1177 | down(&file->mutex); | |
a5b74540 | 1178 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1179 | ctx = list_entry(file->ctxs.next, |
1180 | struct ib_ucm_context, file_list); | |
b9ef520f | 1181 | up(&file->mutex); |
0b2b35f6 | 1182 | |
95ed644f | 1183 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1184 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1185 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1186 | |
1187 | ib_destroy_cm_id(ctx->cm_id); | |
1188 | ib_ucm_cleanup_events(ctx); | |
1189 | kfree(ctx); | |
1190 | ||
a5b74540 HR |
1191 | down(&file->mutex); |
1192 | } | |
a5b74540 | 1193 | up(&file->mutex); |
a5b74540 | 1194 | kfree(file); |
a5b74540 HR |
1195 | return 0; |
1196 | } | |
1197 | ||
07d357d0 SH |
1198 | static void ib_ucm_release_class_dev(struct class_device *class_dev) |
1199 | { | |
1200 | struct ib_ucm_device *dev; | |
1201 | ||
1202 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1203 | cdev_del(&dev->dev); | |
1204 | clear_bit(dev->devnum, dev_map); | |
1205 | kfree(dev); | |
1206 | } | |
1207 | ||
1208 | static struct file_operations ucm_fops = { | |
a5b74540 HR |
1209 | .owner = THIS_MODULE, |
1210 | .open = ib_ucm_open, | |
1211 | .release = ib_ucm_close, | |
1212 | .write = ib_ucm_write, | |
1213 | .poll = ib_ucm_poll, | |
1214 | }; | |
1215 | ||
07d357d0 SH |
1216 | static struct class ucm_class = { |
1217 | .name = "infiniband_cm", | |
1218 | .release = ib_ucm_release_class_dev | |
1219 | }; | |
1220 | ||
07d357d0 SH |
1221 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) |
1222 | { | |
1223 | struct ib_ucm_device *dev; | |
1224 | ||
1225 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1226 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
1227 | } | |
1228 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
a5b74540 | 1229 | |
07d357d0 | 1230 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1231 | { |
07d357d0 | 1232 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1233 | |
07d357d0 SH |
1234 | if (!device->alloc_ucontext) |
1235 | return; | |
1236 | ||
de6eb66b | 1237 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1238 | if (!ucm_dev) |
1239 | return; | |
a5b74540 | 1240 | |
07d357d0 | 1241 | ucm_dev->ib_dev = device; |
a5b74540 | 1242 | |
07d357d0 SH |
1243 | ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
1244 | if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES) | |
1245 | goto err; | |
1246 | ||
1247 | set_bit(ucm_dev->devnum, dev_map); | |
1248 | ||
1249 | cdev_init(&ucm_dev->dev, &ucm_fops); | |
1250 | ucm_dev->dev.owner = THIS_MODULE; | |
1251 | kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum); | |
1252 | if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1)) | |
1253 | goto err; | |
1254 | ||
1255 | ucm_dev->class_dev.class = &ucm_class; | |
1256 | ucm_dev->class_dev.dev = device->dma_device; | |
68f5f996 | 1257 | ucm_dev->class_dev.devt = ucm_dev->dev.dev; |
07d357d0 SH |
1258 | snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d", |
1259 | ucm_dev->devnum); | |
1260 | if (class_device_register(&ucm_dev->class_dev)) | |
a5b74540 | 1261 | goto err_cdev; |
a5b74540 | 1262 | |
07d357d0 SH |
1263 | if (class_device_create_file(&ucm_dev->class_dev, |
1264 | &class_device_attr_ibdev)) | |
a5b74540 | 1265 | goto err_class; |
07d357d0 SH |
1266 | |
1267 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1268 | return; | |
1269 | ||
1270 | err_class: | |
1271 | class_device_unregister(&ucm_dev->class_dev); | |
1272 | err_cdev: | |
1273 | cdev_del(&ucm_dev->dev); | |
1274 | clear_bit(ucm_dev->devnum, dev_map); | |
1275 | err: | |
1276 | kfree(ucm_dev); | |
1277 | return; | |
1278 | } | |
1279 | ||
1280 | static void ib_ucm_remove_one(struct ib_device *device) | |
1281 | { | |
1282 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1283 | ||
1284 | if (!ucm_dev) | |
1285 | return; | |
1286 | ||
1287 | class_device_unregister(&ucm_dev->class_dev); | |
1288 | } | |
1289 | ||
1290 | static ssize_t show_abi_version(struct class *class, char *buf) | |
1291 | { | |
1292 | return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION); | |
1293 | } | |
1294 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1295 | ||
1296 | static int __init ib_ucm_init(void) | |
1297 | { | |
1298 | int ret; | |
1299 | ||
1300 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1301 | "infiniband_cm"); | |
1302 | if (ret) { | |
1303 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
1304 | goto err; | |
a5b74540 HR |
1305 | } |
1306 | ||
07d357d0 SH |
1307 | ret = class_register(&ucm_class); |
1308 | if (ret) { | |
1309 | printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n"); | |
1310 | goto err_chrdev; | |
1311 | } | |
a5b74540 | 1312 | |
07d357d0 SH |
1313 | ret = class_create_file(&ucm_class, &class_attr_abi_version); |
1314 | if (ret) { | |
1315 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
1316 | goto err_class; | |
1317 | } | |
a5b74540 | 1318 | |
07d357d0 SH |
1319 | ret = ib_register_client(&ucm_client); |
1320 | if (ret) { | |
1321 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
1322 | goto err_class; | |
1323 | } | |
a5b74540 | 1324 | return 0; |
07d357d0 | 1325 | |
a5b74540 | 1326 | err_class: |
07d357d0 SH |
1327 | class_unregister(&ucm_class); |
1328 | err_chrdev: | |
1329 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
1330 | err: | |
1331 | return ret; | |
a5b74540 HR |
1332 | } |
1333 | ||
1334 | static void __exit ib_ucm_cleanup(void) | |
1335 | { | |
07d357d0 SH |
1336 | ib_unregister_client(&ucm_client); |
1337 | class_unregister(&ucm_class); | |
1338 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1339 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1340 | } |
1341 | ||
1342 | module_init(ib_ucm_init); | |
1343 | module_exit(ib_ucm_cleanup); |