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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 | * | |
33 | * $Id: ucm.c 2594 2005-06-13 19:46:02Z libor $ | |
34 | */ | |
35 | #include <linux/init.h> | |
36 | #include <linux/fs.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/device.h> | |
39 | #include <linux/err.h> | |
40 | #include <linux/poll.h> | |
41 | #include <linux/file.h> | |
42 | #include <linux/mount.h> | |
43 | #include <linux/cdev.h> | |
595e726a | 44 | #include <linux/idr.h> |
a5b74540 HR |
45 | |
46 | #include <asm/uaccess.h> | |
47 | ||
595e726a SH |
48 | #include <rdma/ib_cm.h> |
49 | #include <rdma/ib_user_cm.h> | |
a5b74540 HR |
50 | |
51 | MODULE_AUTHOR("Libor Michalek"); | |
52 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
53 | MODULE_LICENSE("Dual BSD/GPL"); | |
54 | ||
07d357d0 SH |
55 | struct ib_ucm_device { |
56 | int devnum; | |
57 | struct cdev dev; | |
58 | struct class_device class_dev; | |
59 | struct ib_device *ib_dev; | |
60 | }; | |
61 | ||
595e726a SH |
62 | struct ib_ucm_file { |
63 | struct semaphore mutex; | |
64 | struct file *filp; | |
07d357d0 | 65 | struct ib_ucm_device *device; |
79d81907 | 66 | |
07d357d0 SH |
67 | struct list_head ctxs; |
68 | struct list_head events; | |
595e726a SH |
69 | wait_queue_head_t poll_wait; |
70 | }; | |
71 | ||
72 | struct ib_ucm_context { | |
73 | int id; | |
74 | wait_queue_head_t wait; | |
75 | atomic_t ref; | |
76 | int events_reported; | |
77 | ||
78 | struct ib_ucm_file *file; | |
79 | struct ib_cm_id *cm_id; | |
80 | __u64 uid; | |
81 | ||
82 | struct list_head events; /* list of pending events. */ | |
83 | struct list_head file_list; /* member in file ctx list */ | |
84 | }; | |
85 | ||
86 | struct ib_ucm_event { | |
87 | struct ib_ucm_context *ctx; | |
88 | struct list_head file_list; /* member in file event list */ | |
89 | struct list_head ctx_list; /* member in ctx event list */ | |
90 | ||
91 | struct ib_cm_id *cm_id; | |
92 | struct ib_ucm_event_resp resp; | |
93 | void *data; | |
94 | void *info; | |
95 | int data_len; | |
96 | int info_len; | |
97 | }; | |
79d81907 | 98 | |
a5b74540 HR |
99 | enum { |
100 | IB_UCM_MAJOR = 231, | |
07d357d0 SH |
101 | IB_UCM_BASE_MINOR = 224, |
102 | IB_UCM_MAX_DEVICES = 32 | |
a5b74540 HR |
103 | }; |
104 | ||
07d357d0 | 105 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 106 | |
07d357d0 SH |
107 | static void ib_ucm_add_one(struct ib_device *device); |
108 | static void ib_ucm_remove_one(struct ib_device *device); | |
a5b74540 | 109 | |
07d357d0 SH |
110 | static struct ib_client ucm_client = { |
111 | .name = "ucm", | |
112 | .add = ib_ucm_add_one, | |
113 | .remove = ib_ucm_remove_one | |
114 | }; | |
115 | ||
762a03e2 RD |
116 | static DECLARE_MUTEX(ctx_id_mutex); |
117 | static DEFINE_IDR(ctx_id_table); | |
07d357d0 | 118 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 119 | |
b9ef520f | 120 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
121 | { |
122 | struct ib_ucm_context *ctx; | |
123 | ||
124 | down(&ctx_id_mutex); | |
125 | ctx = idr_find(&ctx_id_table, id); | |
b9ef520f SH |
126 | if (!ctx) |
127 | ctx = ERR_PTR(-ENOENT); | |
128 | else if (ctx->file != file) | |
129 | ctx = ERR_PTR(-EINVAL); | |
130 | else | |
131 | atomic_inc(&ctx->ref); | |
a5b74540 HR |
132 | up(&ctx_id_mutex); |
133 | ||
134 | return ctx; | |
135 | } | |
136 | ||
137 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
138 | { | |
b9ef520f SH |
139 | if (atomic_dec_and_test(&ctx->ref)) |
140 | wake_up(&ctx->wait); | |
141 | } | |
142 | ||
0b2b35f6 | 143 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 144 | { |
0b2b35f6 SH |
145 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
146 | } | |
b9ef520f | 147 | |
0b2b35f6 SH |
148 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
149 | { | |
150 | struct ib_ucm_event *uevent; | |
a5b74540 | 151 | |
0b2b35f6 | 152 | down(&ctx->file->mutex); |
a5b74540 HR |
153 | list_del(&ctx->file_list); |
154 | while (!list_empty(&ctx->events)) { | |
155 | ||
156 | uevent = list_entry(ctx->events.next, | |
157 | struct ib_ucm_event, ctx_list); | |
158 | list_del(&uevent->file_list); | |
159 | list_del(&uevent->ctx_list); | |
160 | ||
161 | /* clear incoming connections. */ | |
0b2b35f6 | 162 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
163 | ib_destroy_cm_id(uevent->cm_id); |
164 | ||
165 | kfree(uevent); | |
166 | } | |
0b2b35f6 | 167 | up(&ctx->file->mutex); |
a5b74540 HR |
168 | } |
169 | ||
170 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
171 | { | |
172 | struct ib_ucm_context *ctx; | |
173 | int result; | |
174 | ||
de6eb66b | 175 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
176 | if (!ctx) |
177 | return NULL; | |
178 | ||
b9ef520f SH |
179 | atomic_set(&ctx->ref, 1); |
180 | init_waitqueue_head(&ctx->wait); | |
a5b74540 | 181 | ctx->file = file; |
a5b74540 | 182 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 183 | |
0b2b35f6 SH |
184 | do { |
185 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
186 | if (!result) | |
187 | goto error; | |
a5b74540 | 188 | |
0b2b35f6 SH |
189 | down(&ctx_id_mutex); |
190 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); | |
191 | up(&ctx_id_mutex); | |
192 | } while (result == -EAGAIN); | |
a5b74540 | 193 | |
a5b74540 HR |
194 | if (result) |
195 | goto error; | |
196 | ||
0b2b35f6 | 197 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 198 | return ctx; |
0b2b35f6 | 199 | |
a5b74540 | 200 | error: |
a5b74540 | 201 | kfree(ctx); |
a5b74540 HR |
202 | return NULL; |
203 | } | |
07d357d0 | 204 | |
a5b74540 HR |
205 | static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath, |
206 | struct ib_sa_path_rec *kpath) | |
207 | { | |
208 | if (!kpath || !upath) | |
209 | return; | |
210 | ||
b9ef520f SH |
211 | memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid); |
212 | memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid); | |
a5b74540 HR |
213 | |
214 | upath->dlid = kpath->dlid; | |
215 | upath->slid = kpath->slid; | |
216 | upath->raw_traffic = kpath->raw_traffic; | |
217 | upath->flow_label = kpath->flow_label; | |
218 | upath->hop_limit = kpath->hop_limit; | |
219 | upath->traffic_class = kpath->traffic_class; | |
220 | upath->reversible = kpath->reversible; | |
221 | upath->numb_path = kpath->numb_path; | |
222 | upath->pkey = kpath->pkey; | |
223 | upath->sl = kpath->sl; | |
224 | upath->mtu_selector = kpath->mtu_selector; | |
225 | upath->mtu = kpath->mtu; | |
226 | upath->rate_selector = kpath->rate_selector; | |
227 | upath->rate = kpath->rate; | |
228 | upath->packet_life_time = kpath->packet_life_time; | |
229 | upath->preference = kpath->preference; | |
230 | ||
231 | upath->packet_life_time_selector = | |
232 | kpath->packet_life_time_selector; | |
233 | } | |
234 | ||
0b2b35f6 | 235 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
236 | struct ib_cm_req_event_param *kreq) |
237 | { | |
a5b74540 HR |
238 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
239 | ureq->remote_qkey = kreq->remote_qkey; | |
240 | ureq->remote_qpn = kreq->remote_qpn; | |
241 | ureq->qp_type = kreq->qp_type; | |
242 | ureq->starting_psn = kreq->starting_psn; | |
243 | ureq->responder_resources = kreq->responder_resources; | |
244 | ureq->initiator_depth = kreq->initiator_depth; | |
245 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
246 | ureq->flow_control = kreq->flow_control; | |
247 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
248 | ureq->retry_count = kreq->retry_count; | |
249 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
250 | ureq->srq = kreq->srq; | |
07d357d0 | 251 | ureq->port = kreq->port; |
a5b74540 HR |
252 | |
253 | ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path); | |
254 | ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path); | |
255 | } | |
256 | ||
257 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
258 | struct ib_cm_rep_event_param *krep) | |
259 | { | |
260 | urep->remote_ca_guid = krep->remote_ca_guid; | |
261 | urep->remote_qkey = krep->remote_qkey; | |
262 | urep->remote_qpn = krep->remote_qpn; | |
263 | urep->starting_psn = krep->starting_psn; | |
264 | urep->responder_resources = krep->responder_resources; | |
265 | urep->initiator_depth = krep->initiator_depth; | |
266 | urep->target_ack_delay = krep->target_ack_delay; | |
267 | urep->failover_accepted = krep->failover_accepted; | |
268 | urep->flow_control = krep->flow_control; | |
269 | urep->rnr_retry_count = krep->rnr_retry_count; | |
270 | urep->srq = krep->srq; | |
271 | } | |
272 | ||
a5b74540 HR |
273 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
274 | struct ib_cm_sidr_rep_event_param *krep) | |
275 | { | |
276 | urep->status = krep->status; | |
277 | urep->qkey = krep->qkey; | |
278 | urep->qpn = krep->qpn; | |
279 | }; | |
280 | ||
0b2b35f6 | 281 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
282 | struct ib_ucm_event *uvt) |
283 | { | |
284 | void *info = NULL; | |
a5b74540 HR |
285 | |
286 | switch (evt->event) { | |
287 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 288 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
289 | &evt->param.req_rcvd); |
290 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 291 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
292 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
293 | IB_UCM_PRES_ALTERNATE : 0); | |
294 | break; | |
295 | case IB_CM_REP_RECEIVED: | |
296 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
297 | &evt->param.rep_rcvd); | |
298 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
299 | break; |
300 | case IB_CM_RTU_RECEIVED: | |
301 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
302 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
303 | break; |
304 | case IB_CM_DREQ_RECEIVED: | |
305 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
306 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
307 | break; |
308 | case IB_CM_DREP_RECEIVED: | |
309 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
310 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
311 | break; |
312 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
313 | uvt->resp.u.mra_resp.timeout = |
314 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 315 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
316 | break; |
317 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 318 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
319 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
320 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
321 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
322 | break; |
323 | case IB_CM_LAP_RECEIVED: | |
b9ef520f SH |
324 | ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path, |
325 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 326 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 327 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
328 | break; |
329 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 330 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
331 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
332 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
333 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
334 | break; |
335 | case IB_CM_SIDR_REQ_RECEIVED: | |
0b2b35f6 SH |
336 | uvt->resp.u.sidr_req_resp.pkey = |
337 | evt->param.sidr_req_rcvd.pkey; | |
07d357d0 SH |
338 | uvt->resp.u.sidr_req_resp.port = |
339 | evt->param.sidr_req_rcvd.port; | |
a5b74540 | 340 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
341 | break; |
342 | case IB_CM_SIDR_REP_RECEIVED: | |
343 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
344 | &evt->param.sidr_rep_rcvd); | |
345 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
346 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
347 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
348 | break; |
349 | default: | |
350 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
351 | break; |
352 | } | |
353 | ||
b9ef520f | 354 | if (uvt->data_len) { |
a5b74540 | 355 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
356 | if (!uvt->data) |
357 | goto err1; | |
a5b74540 HR |
358 | |
359 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
360 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
361 | } | |
362 | ||
b9ef520f | 363 | if (uvt->info_len) { |
a5b74540 | 364 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
365 | if (!uvt->info) |
366 | goto err2; | |
a5b74540 HR |
367 | |
368 | memcpy(uvt->info, info, uvt->info_len); | |
369 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
370 | } | |
a5b74540 | 371 | return 0; |
b9ef520f SH |
372 | |
373 | err2: | |
79d81907 | 374 | kfree(uvt->data); |
b9ef520f SH |
375 | err1: |
376 | return -ENOMEM; | |
a5b74540 HR |
377 | } |
378 | ||
379 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
380 | struct ib_cm_event *event) | |
381 | { | |
382 | struct ib_ucm_event *uevent; | |
383 | struct ib_ucm_context *ctx; | |
384 | int result = 0; | |
a5b74540 | 385 | |
b9ef520f | 386 | ctx = cm_id->context; |
a5b74540 | 387 | |
de6eb66b | 388 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
389 | if (!uevent) |
390 | goto err1; | |
a5b74540 | 391 | |
0b2b35f6 SH |
392 | uevent->ctx = ctx; |
393 | uevent->cm_id = cm_id; | |
394 | uevent->resp.uid = ctx->uid; | |
395 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
396 | uevent->resp.event = event->event; |
397 | ||
0b2b35f6 | 398 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 399 | if (result) |
b9ef520f | 400 | goto err2; |
a5b74540 | 401 | |
a5b74540 | 402 | down(&ctx->file->mutex); |
a5b74540 HR |
403 | list_add_tail(&uevent->file_list, &ctx->file->events); |
404 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 405 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 406 | up(&ctx->file->mutex); |
b9ef520f SH |
407 | return 0; |
408 | ||
409 | err2: | |
410 | kfree(uevent); | |
411 | err1: | |
412 | /* Destroy new cm_id's */ | |
0b2b35f6 | 413 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
414 | } |
415 | ||
416 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
417 | const char __user *inbuf, | |
418 | int in_len, int out_len) | |
419 | { | |
420 | struct ib_ucm_context *ctx; | |
421 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 422 | struct ib_ucm_event *uevent; |
a5b74540 HR |
423 | int result = 0; |
424 | DEFINE_WAIT(wait); | |
425 | ||
426 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
427 | return -ENOSPC; | |
428 | ||
429 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
430 | return -EFAULT; | |
07d357d0 | 431 | |
a5b74540 | 432 | down(&file->mutex); |
a5b74540 HR |
433 | while (list_empty(&file->events)) { |
434 | ||
435 | if (file->filp->f_flags & O_NONBLOCK) { | |
436 | result = -EAGAIN; | |
437 | break; | |
438 | } | |
439 | ||
440 | if (signal_pending(current)) { | |
441 | result = -ERESTARTSYS; | |
442 | break; | |
443 | } | |
444 | ||
445 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
446 | ||
447 | up(&file->mutex); | |
448 | schedule(); | |
449 | down(&file->mutex); | |
450 | ||
451 | finish_wait(&file->poll_wait, &wait); | |
452 | } | |
453 | ||
454 | if (result) | |
455 | goto done; | |
456 | ||
457 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
458 | ||
0b2b35f6 SH |
459 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
460 | ctx = ib_ucm_ctx_alloc(file); | |
461 | if (!ctx) { | |
462 | result = -ENOMEM; | |
463 | goto done; | |
464 | } | |
a5b74540 | 465 | |
0b2b35f6 SH |
466 | ctx->cm_id = uevent->cm_id; |
467 | ctx->cm_id->context = ctx; | |
468 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
469 | } |
470 | ||
a5b74540 HR |
471 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
472 | &uevent->resp, sizeof(uevent->resp))) { | |
473 | result = -EFAULT; | |
474 | goto done; | |
475 | } | |
476 | ||
477 | if (uevent->data) { | |
a5b74540 HR |
478 | if (cmd.data_len < uevent->data_len) { |
479 | result = -ENOMEM; | |
480 | goto done; | |
481 | } | |
a5b74540 HR |
482 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
483 | uevent->data, uevent->data_len)) { | |
484 | result = -EFAULT; | |
485 | goto done; | |
486 | } | |
487 | } | |
488 | ||
489 | if (uevent->info) { | |
a5b74540 HR |
490 | if (cmd.info_len < uevent->info_len) { |
491 | result = -ENOMEM; | |
492 | goto done; | |
493 | } | |
a5b74540 HR |
494 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
495 | uevent->info, uevent->info_len)) { | |
496 | result = -EFAULT; | |
497 | goto done; | |
498 | } | |
499 | } | |
500 | ||
501 | list_del(&uevent->file_list); | |
502 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 503 | uevent->ctx->events_reported++; |
a5b74540 | 504 | |
79d81907 HR |
505 | kfree(uevent->data); |
506 | kfree(uevent->info); | |
a5b74540 HR |
507 | kfree(uevent); |
508 | done: | |
509 | up(&file->mutex); | |
510 | return result; | |
511 | } | |
512 | ||
a5b74540 HR |
513 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
514 | const char __user *inbuf, | |
515 | int in_len, int out_len) | |
516 | { | |
517 | struct ib_ucm_create_id cmd; | |
518 | struct ib_ucm_create_id_resp resp; | |
519 | struct ib_ucm_context *ctx; | |
520 | int result; | |
521 | ||
522 | if (out_len < sizeof(resp)) | |
523 | return -ENOSPC; | |
524 | ||
525 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
526 | return -EFAULT; | |
527 | ||
b9ef520f | 528 | down(&file->mutex); |
a5b74540 | 529 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 530 | up(&file->mutex); |
a5b74540 HR |
531 | if (!ctx) |
532 | return -ENOMEM; | |
533 | ||
0b2b35f6 | 534 | ctx->uid = cmd.uid; |
07d357d0 SH |
535 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
536 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
537 | if (IS_ERR(ctx->cm_id)) { |
538 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 539 | goto err1; |
a5b74540 HR |
540 | } |
541 | ||
542 | resp.id = ctx->id; | |
543 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
544 | &resp, sizeof(resp))) { | |
545 | result = -EFAULT; | |
07d357d0 | 546 | goto err2; |
a5b74540 | 547 | } |
a5b74540 | 548 | return 0; |
a5b74540 | 549 | |
07d357d0 SH |
550 | err2: |
551 | ib_destroy_cm_id(ctx->cm_id); | |
552 | err1: | |
0b2b35f6 SH |
553 | down(&ctx_id_mutex); |
554 | idr_remove(&ctx_id_table, ctx->id); | |
555 | up(&ctx_id_mutex); | |
0b2b35f6 | 556 | kfree(ctx); |
a5b74540 HR |
557 | return result; |
558 | } | |
559 | ||
560 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
561 | const char __user *inbuf, | |
562 | int in_len, int out_len) | |
563 | { | |
564 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
565 | struct ib_ucm_destroy_id_resp resp; |
566 | struct ib_ucm_context *ctx; | |
567 | int result = 0; | |
568 | ||
569 | if (out_len < sizeof(resp)) | |
570 | return -ENOSPC; | |
a5b74540 HR |
571 | |
572 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
573 | return -EFAULT; | |
574 | ||
0b2b35f6 SH |
575 | down(&ctx_id_mutex); |
576 | ctx = idr_find(&ctx_id_table, cmd.id); | |
577 | if (!ctx) | |
578 | ctx = ERR_PTR(-ENOENT); | |
579 | else if (ctx->file != file) | |
580 | ctx = ERR_PTR(-EINVAL); | |
581 | else | |
582 | idr_remove(&ctx_id_table, ctx->id); | |
583 | up(&ctx_id_mutex); | |
584 | ||
585 | if (IS_ERR(ctx)) | |
586 | return PTR_ERR(ctx); | |
587 | ||
588 | atomic_dec(&ctx->ref); | |
589 | wait_event(ctx->wait, !atomic_read(&ctx->ref)); | |
590 | ||
591 | /* No new events will be generated after destroying the cm_id. */ | |
592 | ib_destroy_cm_id(ctx->cm_id); | |
593 | /* Cleanup events not yet reported to the user. */ | |
594 | ib_ucm_cleanup_events(ctx); | |
595 | ||
596 | resp.events_reported = ctx->events_reported; | |
597 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
598 | &resp, sizeof(resp))) | |
599 | result = -EFAULT; | |
600 | ||
601 | kfree(ctx); | |
602 | return result; | |
a5b74540 HR |
603 | } |
604 | ||
605 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
606 | const char __user *inbuf, | |
607 | int in_len, int out_len) | |
608 | { | |
609 | struct ib_ucm_attr_id_resp resp; | |
610 | struct ib_ucm_attr_id cmd; | |
611 | struct ib_ucm_context *ctx; | |
612 | int result = 0; | |
613 | ||
614 | if (out_len < sizeof(resp)) | |
615 | return -ENOSPC; | |
616 | ||
617 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
618 | return -EFAULT; | |
619 | ||
b9ef520f SH |
620 | ctx = ib_ucm_ctx_get(file, cmd.id); |
621 | if (IS_ERR(ctx)) | |
622 | return PTR_ERR(ctx); | |
a5b74540 HR |
623 | |
624 | resp.service_id = ctx->cm_id->service_id; | |
625 | resp.service_mask = ctx->cm_id->service_mask; | |
626 | resp.local_id = ctx->cm_id->local_id; | |
627 | resp.remote_id = ctx->cm_id->remote_id; | |
628 | ||
629 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
630 | &resp, sizeof(resp))) | |
631 | result = -EFAULT; | |
632 | ||
b9ef520f | 633 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
634 | return result; |
635 | } | |
636 | ||
0b2b35f6 SH |
637 | static void ib_ucm_copy_ah_attr(struct ib_ucm_ah_attr *dest_attr, |
638 | struct ib_ah_attr *src_attr) | |
639 | { | |
640 | memcpy(dest_attr->grh_dgid, src_attr->grh.dgid.raw, | |
641 | sizeof src_attr->grh.dgid); | |
642 | dest_attr->grh_flow_label = src_attr->grh.flow_label; | |
643 | dest_attr->grh_sgid_index = src_attr->grh.sgid_index; | |
644 | dest_attr->grh_hop_limit = src_attr->grh.hop_limit; | |
645 | dest_attr->grh_traffic_class = src_attr->grh.traffic_class; | |
646 | ||
647 | dest_attr->dlid = src_attr->dlid; | |
648 | dest_attr->sl = src_attr->sl; | |
649 | dest_attr->src_path_bits = src_attr->src_path_bits; | |
650 | dest_attr->static_rate = src_attr->static_rate; | |
651 | dest_attr->is_global = (src_attr->ah_flags & IB_AH_GRH); | |
652 | dest_attr->port_num = src_attr->port_num; | |
653 | } | |
654 | ||
655 | static void ib_ucm_copy_qp_attr(struct ib_ucm_init_qp_attr_resp *dest_attr, | |
656 | struct ib_qp_attr *src_attr) | |
657 | { | |
658 | dest_attr->cur_qp_state = src_attr->cur_qp_state; | |
659 | dest_attr->path_mtu = src_attr->path_mtu; | |
660 | dest_attr->path_mig_state = src_attr->path_mig_state; | |
661 | dest_attr->qkey = src_attr->qkey; | |
662 | dest_attr->rq_psn = src_attr->rq_psn; | |
663 | dest_attr->sq_psn = src_attr->sq_psn; | |
664 | dest_attr->dest_qp_num = src_attr->dest_qp_num; | |
665 | dest_attr->qp_access_flags = src_attr->qp_access_flags; | |
666 | ||
667 | dest_attr->max_send_wr = src_attr->cap.max_send_wr; | |
668 | dest_attr->max_recv_wr = src_attr->cap.max_recv_wr; | |
669 | dest_attr->max_send_sge = src_attr->cap.max_send_sge; | |
670 | dest_attr->max_recv_sge = src_attr->cap.max_recv_sge; | |
671 | dest_attr->max_inline_data = src_attr->cap.max_inline_data; | |
672 | ||
673 | ib_ucm_copy_ah_attr(&dest_attr->ah_attr, &src_attr->ah_attr); | |
674 | ib_ucm_copy_ah_attr(&dest_attr->alt_ah_attr, &src_attr->alt_ah_attr); | |
675 | ||
676 | dest_attr->pkey_index = src_attr->pkey_index; | |
677 | dest_attr->alt_pkey_index = src_attr->alt_pkey_index; | |
678 | dest_attr->en_sqd_async_notify = src_attr->en_sqd_async_notify; | |
679 | dest_attr->sq_draining = src_attr->sq_draining; | |
680 | dest_attr->max_rd_atomic = src_attr->max_rd_atomic; | |
681 | dest_attr->max_dest_rd_atomic = src_attr->max_dest_rd_atomic; | |
682 | dest_attr->min_rnr_timer = src_attr->min_rnr_timer; | |
683 | dest_attr->port_num = src_attr->port_num; | |
684 | dest_attr->timeout = src_attr->timeout; | |
685 | dest_attr->retry_cnt = src_attr->retry_cnt; | |
686 | dest_attr->rnr_retry = src_attr->rnr_retry; | |
687 | dest_attr->alt_port_num = src_attr->alt_port_num; | |
688 | dest_attr->alt_timeout = src_attr->alt_timeout; | |
689 | } | |
690 | ||
691 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, | |
692 | const char __user *inbuf, | |
693 | int in_len, int out_len) | |
694 | { | |
695 | struct ib_ucm_init_qp_attr_resp resp; | |
696 | struct ib_ucm_init_qp_attr cmd; | |
697 | struct ib_ucm_context *ctx; | |
698 | struct ib_qp_attr qp_attr; | |
699 | int result = 0; | |
700 | ||
701 | if (out_len < sizeof(resp)) | |
702 | return -ENOSPC; | |
703 | ||
704 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
705 | return -EFAULT; | |
706 | ||
707 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
708 | if (IS_ERR(ctx)) | |
709 | return PTR_ERR(ctx); | |
710 | ||
711 | resp.qp_attr_mask = 0; | |
712 | memset(&qp_attr, 0, sizeof qp_attr); | |
713 | qp_attr.qp_state = cmd.qp_state; | |
714 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
715 | if (result) | |
716 | goto out; | |
717 | ||
718 | ib_ucm_copy_qp_attr(&resp, &qp_attr); | |
719 | ||
720 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
721 | &resp, sizeof(resp))) | |
722 | result = -EFAULT; | |
723 | ||
724 | out: | |
725 | ib_ucm_ctx_put(ctx); | |
726 | return result; | |
727 | } | |
728 | ||
a5b74540 HR |
729 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
730 | const char __user *inbuf, | |
731 | int in_len, int out_len) | |
732 | { | |
733 | struct ib_ucm_listen cmd; | |
734 | struct ib_ucm_context *ctx; | |
735 | int result; | |
736 | ||
737 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
738 | return -EFAULT; | |
739 | ||
b9ef520f SH |
740 | ctx = ib_ucm_ctx_get(file, cmd.id); |
741 | if (IS_ERR(ctx)) | |
742 | return PTR_ERR(ctx); | |
a5b74540 | 743 | |
b9ef520f SH |
744 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
745 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
746 | return result; |
747 | } | |
748 | ||
749 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
750 | const char __user *inbuf, | |
751 | int in_len, int out_len) | |
752 | { | |
753 | struct ib_ucm_establish cmd; | |
754 | struct ib_ucm_context *ctx; | |
755 | int result; | |
756 | ||
757 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
758 | return -EFAULT; | |
759 | ||
b9ef520f SH |
760 | ctx = ib_ucm_ctx_get(file, cmd.id); |
761 | if (IS_ERR(ctx)) | |
762 | return PTR_ERR(ctx); | |
a5b74540 | 763 | |
b9ef520f SH |
764 | result = ib_cm_establish(ctx->cm_id); |
765 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
766 | return result; |
767 | } | |
768 | ||
769 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
770 | { | |
771 | void *data; | |
772 | ||
773 | *dest = NULL; | |
774 | ||
775 | if (!len) | |
776 | return 0; | |
777 | ||
778 | data = kmalloc(len, GFP_KERNEL); | |
779 | if (!data) | |
780 | return -ENOMEM; | |
781 | ||
782 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
783 | kfree(data); | |
784 | return -EFAULT; | |
785 | } | |
786 | ||
787 | *dest = data; | |
788 | return 0; | |
789 | } | |
790 | ||
791 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
792 | { | |
793 | struct ib_ucm_path_rec ucm_path; | |
794 | struct ib_sa_path_rec *sa_path; | |
795 | ||
796 | *path = NULL; | |
797 | ||
798 | if (!src) | |
799 | return 0; | |
800 | ||
801 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
802 | if (!sa_path) | |
803 | return -ENOMEM; | |
804 | ||
805 | if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src, | |
806 | sizeof(ucm_path))) { | |
807 | ||
808 | kfree(sa_path); | |
809 | return -EFAULT; | |
810 | } | |
811 | ||
b9ef520f SH |
812 | memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid); |
813 | memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid); | |
a5b74540 HR |
814 | |
815 | sa_path->dlid = ucm_path.dlid; | |
816 | sa_path->slid = ucm_path.slid; | |
817 | sa_path->raw_traffic = ucm_path.raw_traffic; | |
818 | sa_path->flow_label = ucm_path.flow_label; | |
819 | sa_path->hop_limit = ucm_path.hop_limit; | |
820 | sa_path->traffic_class = ucm_path.traffic_class; | |
821 | sa_path->reversible = ucm_path.reversible; | |
822 | sa_path->numb_path = ucm_path.numb_path; | |
823 | sa_path->pkey = ucm_path.pkey; | |
824 | sa_path->sl = ucm_path.sl; | |
825 | sa_path->mtu_selector = ucm_path.mtu_selector; | |
826 | sa_path->mtu = ucm_path.mtu; | |
827 | sa_path->rate_selector = ucm_path.rate_selector; | |
828 | sa_path->rate = ucm_path.rate; | |
829 | sa_path->packet_life_time = ucm_path.packet_life_time; | |
830 | sa_path->preference = ucm_path.preference; | |
831 | ||
832 | sa_path->packet_life_time_selector = | |
833 | ucm_path.packet_life_time_selector; | |
834 | ||
835 | *path = sa_path; | |
836 | return 0; | |
837 | } | |
838 | ||
839 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
840 | const char __user *inbuf, | |
841 | int in_len, int out_len) | |
842 | { | |
843 | struct ib_cm_req_param param; | |
844 | struct ib_ucm_context *ctx; | |
845 | struct ib_ucm_req cmd; | |
846 | int result; | |
847 | ||
848 | param.private_data = NULL; | |
849 | param.primary_path = NULL; | |
850 | param.alternate_path = NULL; | |
851 | ||
852 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
853 | return -EFAULT; | |
854 | ||
855 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
856 | if (result) | |
857 | goto done; | |
858 | ||
859 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
860 | if (result) | |
861 | goto done; | |
862 | ||
863 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
864 | if (result) | |
865 | goto done; | |
866 | ||
867 | param.private_data_len = cmd.len; | |
868 | param.service_id = cmd.sid; | |
869 | param.qp_num = cmd.qpn; | |
870 | param.qp_type = cmd.qp_type; | |
871 | param.starting_psn = cmd.psn; | |
872 | param.peer_to_peer = cmd.peer_to_peer; | |
873 | param.responder_resources = cmd.responder_resources; | |
874 | param.initiator_depth = cmd.initiator_depth; | |
875 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
876 | param.flow_control = cmd.flow_control; | |
877 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
878 | param.retry_count = cmd.retry_count; | |
879 | param.rnr_retry_count = cmd.rnr_retry_count; | |
880 | param.max_cm_retries = cmd.max_cm_retries; | |
881 | param.srq = cmd.srq; | |
882 | ||
b9ef520f SH |
883 | ctx = ib_ucm_ctx_get(file, cmd.id); |
884 | if (!IS_ERR(ctx)) { | |
a5b74540 | 885 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
886 | ib_ucm_ctx_put(ctx); |
887 | } else | |
888 | result = PTR_ERR(ctx); | |
a5b74540 | 889 | |
a5b74540 | 890 | done: |
79d81907 HR |
891 | kfree(param.private_data); |
892 | kfree(param.primary_path); | |
893 | kfree(param.alternate_path); | |
a5b74540 HR |
894 | return result; |
895 | } | |
896 | ||
897 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
898 | const char __user *inbuf, | |
899 | int in_len, int out_len) | |
900 | { | |
901 | struct ib_cm_rep_param param; | |
902 | struct ib_ucm_context *ctx; | |
903 | struct ib_ucm_rep cmd; | |
904 | int result; | |
905 | ||
906 | param.private_data = NULL; | |
907 | ||
908 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
909 | return -EFAULT; | |
910 | ||
911 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
912 | if (result) | |
913 | return result; | |
914 | ||
915 | param.qp_num = cmd.qpn; | |
916 | param.starting_psn = cmd.psn; | |
917 | param.private_data_len = cmd.len; | |
918 | param.responder_resources = cmd.responder_resources; | |
919 | param.initiator_depth = cmd.initiator_depth; | |
920 | param.target_ack_delay = cmd.target_ack_delay; | |
921 | param.failover_accepted = cmd.failover_accepted; | |
922 | param.flow_control = cmd.flow_control; | |
923 | param.rnr_retry_count = cmd.rnr_retry_count; | |
924 | param.srq = cmd.srq; | |
925 | ||
b9ef520f SH |
926 | ctx = ib_ucm_ctx_get(file, cmd.id); |
927 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 928 | ctx->uid = cmd.uid; |
a5b74540 | 929 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
930 | ib_ucm_ctx_put(ctx); |
931 | } else | |
932 | result = PTR_ERR(ctx); | |
a5b74540 | 933 | |
79d81907 | 934 | kfree(param.private_data); |
a5b74540 HR |
935 | return result; |
936 | } | |
937 | ||
938 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
939 | const char __user *inbuf, int in_len, | |
940 | int (*func)(struct ib_cm_id *cm_id, | |
941 | const void *private_data, | |
942 | u8 private_data_len)) | |
943 | { | |
944 | struct ib_ucm_private_data cmd; | |
945 | struct ib_ucm_context *ctx; | |
946 | const void *private_data = NULL; | |
947 | int result; | |
948 | ||
949 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
950 | return -EFAULT; | |
951 | ||
952 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
953 | if (result) | |
954 | return result; | |
955 | ||
b9ef520f SH |
956 | ctx = ib_ucm_ctx_get(file, cmd.id); |
957 | if (!IS_ERR(ctx)) { | |
a5b74540 | 958 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
959 | ib_ucm_ctx_put(ctx); |
960 | } else | |
961 | result = PTR_ERR(ctx); | |
a5b74540 | 962 | |
79d81907 | 963 | kfree(private_data); |
a5b74540 HR |
964 | return result; |
965 | } | |
966 | ||
967 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
968 | const char __user *inbuf, | |
969 | int in_len, int out_len) | |
970 | { | |
971 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
972 | } | |
973 | ||
974 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
975 | const char __user *inbuf, | |
976 | int in_len, int out_len) | |
977 | { | |
978 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
979 | } | |
980 | ||
981 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
982 | const char __user *inbuf, | |
983 | int in_len, int out_len) | |
984 | { | |
985 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
986 | } | |
987 | ||
988 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
989 | const char __user *inbuf, int in_len, | |
990 | int (*func)(struct ib_cm_id *cm_id, | |
991 | int status, | |
992 | const void *info, | |
993 | u8 info_len, | |
994 | const void *data, | |
995 | u8 data_len)) | |
996 | { | |
997 | struct ib_ucm_context *ctx; | |
998 | struct ib_ucm_info cmd; | |
999 | const void *data = NULL; | |
1000 | const void *info = NULL; | |
1001 | int result; | |
1002 | ||
1003 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1004 | return -EFAULT; | |
1005 | ||
1006 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
1007 | if (result) | |
1008 | goto done; | |
1009 | ||
1010 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
1011 | if (result) | |
1012 | goto done; | |
1013 | ||
b9ef520f SH |
1014 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1015 | if (!IS_ERR(ctx)) { | |
1016 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 1017 | data, cmd.data_len); |
b9ef520f SH |
1018 | ib_ucm_ctx_put(ctx); |
1019 | } else | |
1020 | result = PTR_ERR(ctx); | |
a5b74540 | 1021 | |
a5b74540 | 1022 | done: |
79d81907 HR |
1023 | kfree(data); |
1024 | kfree(info); | |
a5b74540 HR |
1025 | return result; |
1026 | } | |
1027 | ||
1028 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
1029 | const char __user *inbuf, | |
1030 | int in_len, int out_len) | |
1031 | { | |
1032 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
1033 | } | |
1034 | ||
1035 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
1036 | const char __user *inbuf, | |
1037 | int in_len, int out_len) | |
1038 | { | |
1039 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
1040 | } | |
1041 | ||
1042 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
1043 | const char __user *inbuf, | |
1044 | int in_len, int out_len) | |
1045 | { | |
1046 | struct ib_ucm_context *ctx; | |
1047 | struct ib_ucm_mra cmd; | |
1048 | const void *data = NULL; | |
1049 | int result; | |
1050 | ||
1051 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1052 | return -EFAULT; | |
1053 | ||
1054 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1055 | if (result) | |
1056 | return result; | |
1057 | ||
b9ef520f SH |
1058 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1059 | if (!IS_ERR(ctx)) { | |
1060 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
1061 | ib_ucm_ctx_put(ctx); | |
1062 | } else | |
1063 | result = PTR_ERR(ctx); | |
a5b74540 | 1064 | |
79d81907 | 1065 | kfree(data); |
a5b74540 HR |
1066 | return result; |
1067 | } | |
1068 | ||
1069 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
1070 | const char __user *inbuf, | |
1071 | int in_len, int out_len) | |
1072 | { | |
1073 | struct ib_ucm_context *ctx; | |
1074 | struct ib_sa_path_rec *path = NULL; | |
1075 | struct ib_ucm_lap cmd; | |
1076 | const void *data = NULL; | |
1077 | int result; | |
1078 | ||
1079 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1080 | return -EFAULT; | |
1081 | ||
1082 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1083 | if (result) | |
1084 | goto done; | |
1085 | ||
1086 | result = ib_ucm_path_get(&path, cmd.path); | |
1087 | if (result) | |
1088 | goto done; | |
1089 | ||
b9ef520f SH |
1090 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1091 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1092 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
1093 | ib_ucm_ctx_put(ctx); |
1094 | } else | |
1095 | result = PTR_ERR(ctx); | |
a5b74540 | 1096 | |
a5b74540 | 1097 | done: |
79d81907 HR |
1098 | kfree(data); |
1099 | kfree(path); | |
a5b74540 HR |
1100 | return result; |
1101 | } | |
1102 | ||
1103 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1104 | const char __user *inbuf, | |
1105 | int in_len, int out_len) | |
1106 | { | |
1107 | struct ib_cm_sidr_req_param param; | |
1108 | struct ib_ucm_context *ctx; | |
1109 | struct ib_ucm_sidr_req cmd; | |
1110 | int result; | |
1111 | ||
1112 | param.private_data = NULL; | |
1113 | param.path = NULL; | |
1114 | ||
1115 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1116 | return -EFAULT; | |
1117 | ||
1118 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1119 | if (result) | |
1120 | goto done; | |
1121 | ||
1122 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1123 | if (result) | |
1124 | goto done; | |
1125 | ||
1126 | param.private_data_len = cmd.len; | |
1127 | param.service_id = cmd.sid; | |
1128 | param.timeout_ms = cmd.timeout; | |
1129 | param.max_cm_retries = cmd.max_cm_retries; | |
1130 | param.pkey = cmd.pkey; | |
1131 | ||
b9ef520f SH |
1132 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1133 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1134 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1135 | ib_ucm_ctx_put(ctx); |
1136 | } else | |
1137 | result = PTR_ERR(ctx); | |
a5b74540 | 1138 | |
a5b74540 | 1139 | done: |
79d81907 HR |
1140 | kfree(param.private_data); |
1141 | kfree(param.path); | |
a5b74540 HR |
1142 | return result; |
1143 | } | |
1144 | ||
1145 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1146 | const char __user *inbuf, | |
1147 | int in_len, int out_len) | |
1148 | { | |
1149 | struct ib_cm_sidr_rep_param param; | |
1150 | struct ib_ucm_sidr_rep cmd; | |
1151 | struct ib_ucm_context *ctx; | |
1152 | int result; | |
1153 | ||
1154 | param.info = NULL; | |
1155 | ||
1156 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1157 | return -EFAULT; | |
1158 | ||
1159 | result = ib_ucm_alloc_data(¶m.private_data, | |
1160 | cmd.data, cmd.data_len); | |
1161 | if (result) | |
1162 | goto done; | |
1163 | ||
1164 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1165 | if (result) | |
1166 | goto done; | |
1167 | ||
b9ef520f SH |
1168 | param.qp_num = cmd.qpn; |
1169 | param.qkey = cmd.qkey; | |
1170 | param.status = cmd.status; | |
1171 | param.info_length = cmd.info_len; | |
1172 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1173 | |
b9ef520f SH |
1174 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1175 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1176 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1177 | ib_ucm_ctx_put(ctx); |
1178 | } else | |
1179 | result = PTR_ERR(ctx); | |
a5b74540 | 1180 | |
a5b74540 | 1181 | done: |
79d81907 HR |
1182 | kfree(param.private_data); |
1183 | kfree(param.info); | |
a5b74540 HR |
1184 | return result; |
1185 | } | |
1186 | ||
1187 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1188 | const char __user *inbuf, | |
1189 | int in_len, int out_len) = { | |
1190 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1191 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1192 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1193 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1194 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1195 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1196 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1197 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1198 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1199 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1200 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1201 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1202 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1203 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1204 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1205 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1206 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1207 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1208 | }; |
1209 | ||
1210 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1211 | size_t len, loff_t *pos) | |
1212 | { | |
1213 | struct ib_ucm_file *file = filp->private_data; | |
1214 | struct ib_ucm_cmd_hdr hdr; | |
1215 | ssize_t result; | |
1216 | ||
1217 | if (len < sizeof(hdr)) | |
1218 | return -EINVAL; | |
1219 | ||
1220 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1221 | return -EFAULT; | |
1222 | ||
a5b74540 HR |
1223 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
1224 | return -EINVAL; | |
1225 | ||
1226 | if (hdr.in + sizeof(hdr) > len) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1230 | hdr.in, hdr.out); | |
1231 | if (!result) | |
1232 | result = len; | |
1233 | ||
1234 | return result; | |
1235 | } | |
1236 | ||
1237 | static unsigned int ib_ucm_poll(struct file *filp, | |
1238 | struct poll_table_struct *wait) | |
1239 | { | |
1240 | struct ib_ucm_file *file = filp->private_data; | |
1241 | unsigned int mask = 0; | |
1242 | ||
1243 | poll_wait(filp, &file->poll_wait, wait); | |
1244 | ||
1245 | if (!list_empty(&file->events)) | |
1246 | mask = POLLIN | POLLRDNORM; | |
1247 | ||
1248 | return mask; | |
1249 | } | |
1250 | ||
1251 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1252 | { | |
1253 | struct ib_ucm_file *file; | |
1254 | ||
1255 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1256 | if (!file) | |
1257 | return -ENOMEM; | |
1258 | ||
1259 | INIT_LIST_HEAD(&file->events); | |
1260 | INIT_LIST_HEAD(&file->ctxs); | |
1261 | init_waitqueue_head(&file->poll_wait); | |
1262 | ||
1263 | init_MUTEX(&file->mutex); | |
1264 | ||
1265 | filp->private_data = file; | |
1266 | file->filp = filp; | |
07d357d0 | 1267 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev); |
a5b74540 | 1268 | |
a5b74540 HR |
1269 | return 0; |
1270 | } | |
1271 | ||
1272 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1273 | { | |
1274 | struct ib_ucm_file *file = filp->private_data; | |
1275 | struct ib_ucm_context *ctx; | |
1276 | ||
1277 | down(&file->mutex); | |
a5b74540 | 1278 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1279 | ctx = list_entry(file->ctxs.next, |
1280 | struct ib_ucm_context, file_list); | |
b9ef520f | 1281 | up(&file->mutex); |
0b2b35f6 SH |
1282 | |
1283 | down(&ctx_id_mutex); | |
1284 | idr_remove(&ctx_id_table, ctx->id); | |
1285 | up(&ctx_id_mutex); | |
1286 | ||
1287 | ib_destroy_cm_id(ctx->cm_id); | |
1288 | ib_ucm_cleanup_events(ctx); | |
1289 | kfree(ctx); | |
1290 | ||
a5b74540 HR |
1291 | down(&file->mutex); |
1292 | } | |
a5b74540 | 1293 | up(&file->mutex); |
a5b74540 | 1294 | kfree(file); |
a5b74540 HR |
1295 | return 0; |
1296 | } | |
1297 | ||
07d357d0 SH |
1298 | static void ib_ucm_release_class_dev(struct class_device *class_dev) |
1299 | { | |
1300 | struct ib_ucm_device *dev; | |
1301 | ||
1302 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1303 | cdev_del(&dev->dev); | |
1304 | clear_bit(dev->devnum, dev_map); | |
1305 | kfree(dev); | |
1306 | } | |
1307 | ||
1308 | static struct file_operations ucm_fops = { | |
a5b74540 HR |
1309 | .owner = THIS_MODULE, |
1310 | .open = ib_ucm_open, | |
1311 | .release = ib_ucm_close, | |
1312 | .write = ib_ucm_write, | |
1313 | .poll = ib_ucm_poll, | |
1314 | }; | |
1315 | ||
07d357d0 SH |
1316 | static struct class ucm_class = { |
1317 | .name = "infiniband_cm", | |
1318 | .release = ib_ucm_release_class_dev | |
1319 | }; | |
1320 | ||
1321 | static ssize_t show_dev(struct class_device *class_dev, char *buf) | |
1322 | { | |
1323 | struct ib_ucm_device *dev; | |
1324 | ||
1325 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1326 | return print_dev_t(buf, dev->dev.dev); | |
1327 | } | |
1328 | static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL); | |
a5b74540 | 1329 | |
07d357d0 SH |
1330 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) |
1331 | { | |
1332 | struct ib_ucm_device *dev; | |
1333 | ||
1334 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1335 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
1336 | } | |
1337 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
a5b74540 | 1338 | |
07d357d0 | 1339 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1340 | { |
07d357d0 | 1341 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1342 | |
07d357d0 SH |
1343 | if (!device->alloc_ucontext) |
1344 | return; | |
1345 | ||
de6eb66b | 1346 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1347 | if (!ucm_dev) |
1348 | return; | |
a5b74540 | 1349 | |
07d357d0 | 1350 | ucm_dev->ib_dev = device; |
a5b74540 | 1351 | |
07d357d0 SH |
1352 | ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
1353 | if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES) | |
1354 | goto err; | |
1355 | ||
1356 | set_bit(ucm_dev->devnum, dev_map); | |
1357 | ||
1358 | cdev_init(&ucm_dev->dev, &ucm_fops); | |
1359 | ucm_dev->dev.owner = THIS_MODULE; | |
1360 | kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum); | |
1361 | if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1)) | |
1362 | goto err; | |
1363 | ||
1364 | ucm_dev->class_dev.class = &ucm_class; | |
1365 | ucm_dev->class_dev.dev = device->dma_device; | |
1366 | snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d", | |
1367 | ucm_dev->devnum); | |
1368 | if (class_device_register(&ucm_dev->class_dev)) | |
a5b74540 | 1369 | goto err_cdev; |
a5b74540 | 1370 | |
07d357d0 SH |
1371 | if (class_device_create_file(&ucm_dev->class_dev, |
1372 | &class_device_attr_dev)) | |
1373 | goto err_class; | |
1374 | if (class_device_create_file(&ucm_dev->class_dev, | |
1375 | &class_device_attr_ibdev)) | |
a5b74540 | 1376 | goto err_class; |
07d357d0 SH |
1377 | |
1378 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1379 | return; | |
1380 | ||
1381 | err_class: | |
1382 | class_device_unregister(&ucm_dev->class_dev); | |
1383 | err_cdev: | |
1384 | cdev_del(&ucm_dev->dev); | |
1385 | clear_bit(ucm_dev->devnum, dev_map); | |
1386 | err: | |
1387 | kfree(ucm_dev); | |
1388 | return; | |
1389 | } | |
1390 | ||
1391 | static void ib_ucm_remove_one(struct ib_device *device) | |
1392 | { | |
1393 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1394 | ||
1395 | if (!ucm_dev) | |
1396 | return; | |
1397 | ||
1398 | class_device_unregister(&ucm_dev->class_dev); | |
1399 | } | |
1400 | ||
1401 | static ssize_t show_abi_version(struct class *class, char *buf) | |
1402 | { | |
1403 | return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION); | |
1404 | } | |
1405 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1406 | ||
1407 | static int __init ib_ucm_init(void) | |
1408 | { | |
1409 | int ret; | |
1410 | ||
1411 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1412 | "infiniband_cm"); | |
1413 | if (ret) { | |
1414 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
1415 | goto err; | |
a5b74540 HR |
1416 | } |
1417 | ||
07d357d0 SH |
1418 | ret = class_register(&ucm_class); |
1419 | if (ret) { | |
1420 | printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n"); | |
1421 | goto err_chrdev; | |
1422 | } | |
a5b74540 | 1423 | |
07d357d0 SH |
1424 | ret = class_create_file(&ucm_class, &class_attr_abi_version); |
1425 | if (ret) { | |
1426 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
1427 | goto err_class; | |
1428 | } | |
a5b74540 | 1429 | |
07d357d0 SH |
1430 | ret = ib_register_client(&ucm_client); |
1431 | if (ret) { | |
1432 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
1433 | goto err_class; | |
1434 | } | |
a5b74540 | 1435 | return 0; |
07d357d0 | 1436 | |
a5b74540 | 1437 | err_class: |
07d357d0 SH |
1438 | class_unregister(&ucm_class); |
1439 | err_chrdev: | |
1440 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
1441 | err: | |
1442 | return ret; | |
a5b74540 HR |
1443 | } |
1444 | ||
1445 | static void __exit ib_ucm_cleanup(void) | |
1446 | { | |
07d357d0 SH |
1447 | ib_unregister_client(&ucm_client); |
1448 | class_unregister(&ucm_class); | |
1449 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1450 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1451 | } |
1452 | ||
1453 | module_init(ib_ucm_init); | |
1454 | module_exit(ib_ucm_cleanup); |