Commit | Line | Data |
---|---|---|
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> | |
44 | ||
45 | #include <asm/uaccess.h> | |
46 | ||
47 | #include "ucm.h" | |
48 | ||
49 | MODULE_AUTHOR("Libor Michalek"); | |
50 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
51 | MODULE_LICENSE("Dual BSD/GPL"); | |
52 | ||
79d81907 HR |
53 | static int ucm_debug_level; |
54 | ||
55 | module_param_named(debug_level, ucm_debug_level, int, 0644); | |
56 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); | |
57 | ||
a5b74540 HR |
58 | enum { |
59 | IB_UCM_MAJOR = 231, | |
60 | IB_UCM_MINOR = 255 | |
61 | }; | |
62 | ||
63 | #define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR) | |
64 | ||
79d81907 HR |
65 | #define PFX "UCM: " |
66 | ||
67 | #define ucm_dbg(format, arg...) \ | |
68 | do { \ | |
69 | if (ucm_debug_level > 0) \ | |
70 | printk(KERN_DEBUG PFX format, ## arg); \ | |
71 | } while (0) | |
72 | ||
a5b74540 HR |
73 | static struct semaphore ctx_id_mutex; |
74 | static struct idr ctx_id_table; | |
75 | static int ctx_id_rover = 0; | |
76 | ||
b9ef520f | 77 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
78 | { |
79 | struct ib_ucm_context *ctx; | |
80 | ||
81 | down(&ctx_id_mutex); | |
82 | ctx = idr_find(&ctx_id_table, id); | |
b9ef520f SH |
83 | if (!ctx) |
84 | ctx = ERR_PTR(-ENOENT); | |
85 | else if (ctx->file != file) | |
86 | ctx = ERR_PTR(-EINVAL); | |
87 | else | |
88 | atomic_inc(&ctx->ref); | |
a5b74540 HR |
89 | up(&ctx_id_mutex); |
90 | ||
91 | return ctx; | |
92 | } | |
93 | ||
94 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
95 | { | |
b9ef520f SH |
96 | if (atomic_dec_and_test(&ctx->ref)) |
97 | wake_up(&ctx->wait); | |
98 | } | |
99 | ||
100 | static ssize_t ib_ucm_destroy_ctx(struct ib_ucm_file *file, int id) | |
101 | { | |
102 | struct ib_ucm_context *ctx; | |
a5b74540 HR |
103 | struct ib_ucm_event *uevent; |
104 | ||
105 | down(&ctx_id_mutex); | |
b9ef520f SH |
106 | ctx = idr_find(&ctx_id_table, id); |
107 | if (!ctx) | |
108 | ctx = ERR_PTR(-ENOENT); | |
109 | else if (ctx->file != file) | |
110 | ctx = ERR_PTR(-EINVAL); | |
111 | else | |
a5b74540 | 112 | idr_remove(&ctx_id_table, ctx->id); |
a5b74540 HR |
113 | up(&ctx_id_mutex); |
114 | ||
b9ef520f SH |
115 | if (IS_ERR(ctx)) |
116 | return PTR_ERR(ctx); | |
a5b74540 | 117 | |
b9ef520f SH |
118 | atomic_dec(&ctx->ref); |
119 | wait_event(ctx->wait, !atomic_read(&ctx->ref)); | |
120 | ||
121 | /* No new events will be generated after destroying the cm_id. */ | |
122 | if (!IS_ERR(ctx->cm_id)) | |
123 | ib_destroy_cm_id(ctx->cm_id); | |
a5b74540 | 124 | |
b9ef520f SH |
125 | /* Cleanup events not yet reported to the user. */ |
126 | down(&file->mutex); | |
a5b74540 HR |
127 | list_del(&ctx->file_list); |
128 | while (!list_empty(&ctx->events)) { | |
129 | ||
130 | uevent = list_entry(ctx->events.next, | |
131 | struct ib_ucm_event, ctx_list); | |
132 | list_del(&uevent->file_list); | |
133 | list_del(&uevent->ctx_list); | |
134 | ||
135 | /* clear incoming connections. */ | |
136 | if (uevent->cm_id) | |
137 | ib_destroy_cm_id(uevent->cm_id); | |
138 | ||
139 | kfree(uevent); | |
140 | } | |
b9ef520f | 141 | up(&file->mutex); |
a5b74540 | 142 | |
a5b74540 | 143 | kfree(ctx); |
b9ef520f | 144 | return 0; |
a5b74540 HR |
145 | } |
146 | ||
147 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
148 | { | |
149 | struct ib_ucm_context *ctx; | |
150 | int result; | |
151 | ||
152 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); | |
153 | if (!ctx) | |
154 | return NULL; | |
155 | ||
b9ef520f SH |
156 | atomic_set(&ctx->ref, 1); |
157 | init_waitqueue_head(&ctx->wait); | |
a5b74540 HR |
158 | ctx->file = file; |
159 | ||
160 | INIT_LIST_HEAD(&ctx->events); | |
a5b74540 HR |
161 | |
162 | list_add_tail(&ctx->file_list, &file->ctxs); | |
163 | ||
164 | ctx_id_rover = (ctx_id_rover + 1) & INT_MAX; | |
165 | retry: | |
166 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
167 | if (!result) | |
168 | goto error; | |
169 | ||
170 | down(&ctx_id_mutex); | |
171 | result = idr_get_new_above(&ctx_id_table, ctx, ctx_id_rover, &ctx->id); | |
172 | up(&ctx_id_mutex); | |
173 | ||
174 | if (result == -EAGAIN) | |
175 | goto retry; | |
176 | if (result) | |
177 | goto error; | |
178 | ||
79d81907 | 179 | ucm_dbg("Allocated CM ID <%d>\n", ctx->id); |
a5b74540 HR |
180 | |
181 | return ctx; | |
182 | error: | |
183 | list_del(&ctx->file_list); | |
184 | kfree(ctx); | |
185 | ||
186 | return NULL; | |
187 | } | |
188 | /* | |
189 | * Event portion of the API, handle CM events | |
190 | * and allow event polling. | |
191 | */ | |
192 | static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath, | |
193 | struct ib_sa_path_rec *kpath) | |
194 | { | |
195 | if (!kpath || !upath) | |
196 | return; | |
197 | ||
b9ef520f SH |
198 | memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid); |
199 | memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid); | |
a5b74540 HR |
200 | |
201 | upath->dlid = kpath->dlid; | |
202 | upath->slid = kpath->slid; | |
203 | upath->raw_traffic = kpath->raw_traffic; | |
204 | upath->flow_label = kpath->flow_label; | |
205 | upath->hop_limit = kpath->hop_limit; | |
206 | upath->traffic_class = kpath->traffic_class; | |
207 | upath->reversible = kpath->reversible; | |
208 | upath->numb_path = kpath->numb_path; | |
209 | upath->pkey = kpath->pkey; | |
210 | upath->sl = kpath->sl; | |
211 | upath->mtu_selector = kpath->mtu_selector; | |
212 | upath->mtu = kpath->mtu; | |
213 | upath->rate_selector = kpath->rate_selector; | |
214 | upath->rate = kpath->rate; | |
215 | upath->packet_life_time = kpath->packet_life_time; | |
216 | upath->preference = kpath->preference; | |
217 | ||
218 | upath->packet_life_time_selector = | |
219 | kpath->packet_life_time_selector; | |
220 | } | |
221 | ||
b9ef520f SH |
222 | static void ib_ucm_event_req_get(struct ib_ucm_context *ctx, |
223 | struct ib_ucm_req_event_resp *ureq, | |
a5b74540 HR |
224 | struct ib_cm_req_event_param *kreq) |
225 | { | |
b9ef520f | 226 | ureq->listen_id = ctx->id; |
a5b74540 HR |
227 | |
228 | ureq->remote_ca_guid = kreq->remote_ca_guid; | |
229 | ureq->remote_qkey = kreq->remote_qkey; | |
230 | ureq->remote_qpn = kreq->remote_qpn; | |
231 | ureq->qp_type = kreq->qp_type; | |
232 | ureq->starting_psn = kreq->starting_psn; | |
233 | ureq->responder_resources = kreq->responder_resources; | |
234 | ureq->initiator_depth = kreq->initiator_depth; | |
235 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
236 | ureq->flow_control = kreq->flow_control; | |
237 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
238 | ureq->retry_count = kreq->retry_count; | |
239 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
240 | ureq->srq = kreq->srq; | |
241 | ||
242 | ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path); | |
243 | ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path); | |
244 | } | |
245 | ||
246 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
247 | struct ib_cm_rep_event_param *krep) | |
248 | { | |
249 | urep->remote_ca_guid = krep->remote_ca_guid; | |
250 | urep->remote_qkey = krep->remote_qkey; | |
251 | urep->remote_qpn = krep->remote_qpn; | |
252 | urep->starting_psn = krep->starting_psn; | |
253 | urep->responder_resources = krep->responder_resources; | |
254 | urep->initiator_depth = krep->initiator_depth; | |
255 | urep->target_ack_delay = krep->target_ack_delay; | |
256 | urep->failover_accepted = krep->failover_accepted; | |
257 | urep->flow_control = krep->flow_control; | |
258 | urep->rnr_retry_count = krep->rnr_retry_count; | |
259 | urep->srq = krep->srq; | |
260 | } | |
261 | ||
b9ef520f SH |
262 | static void ib_ucm_event_sidr_req_get(struct ib_ucm_context *ctx, |
263 | struct ib_ucm_sidr_req_event_resp *ureq, | |
a5b74540 HR |
264 | struct ib_cm_sidr_req_event_param *kreq) |
265 | { | |
b9ef520f | 266 | ureq->listen_id = ctx->id; |
a5b74540 HR |
267 | ureq->pkey = kreq->pkey; |
268 | } | |
269 | ||
270 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, | |
271 | struct ib_cm_sidr_rep_event_param *krep) | |
272 | { | |
273 | urep->status = krep->status; | |
274 | urep->qkey = krep->qkey; | |
275 | urep->qpn = krep->qpn; | |
276 | }; | |
277 | ||
b9ef520f SH |
278 | static int ib_ucm_event_process(struct ib_ucm_context *ctx, |
279 | struct ib_cm_event *evt, | |
a5b74540 HR |
280 | struct ib_ucm_event *uvt) |
281 | { | |
282 | void *info = NULL; | |
a5b74540 HR |
283 | |
284 | switch (evt->event) { | |
285 | case IB_CM_REQ_RECEIVED: | |
b9ef520f | 286 | ib_ucm_event_req_get(ctx, &uvt->resp.u.req_resp, |
a5b74540 HR |
287 | &evt->param.req_rcvd); |
288 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 289 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
290 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
291 | IB_UCM_PRES_ALTERNATE : 0); | |
292 | break; | |
293 | case IB_CM_REP_RECEIVED: | |
294 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
295 | &evt->param.rep_rcvd); | |
296 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
297 | break; |
298 | case IB_CM_RTU_RECEIVED: | |
299 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
300 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
301 | break; |
302 | case IB_CM_DREQ_RECEIVED: | |
303 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
304 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
305 | break; |
306 | case IB_CM_DREP_RECEIVED: | |
307 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
308 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
309 | break; |
310 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
311 | uvt->resp.u.mra_resp.timeout = |
312 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 313 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
314 | break; |
315 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 316 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
317 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
318 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
319 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
320 | break; |
321 | case IB_CM_LAP_RECEIVED: | |
b9ef520f SH |
322 | ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path, |
323 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 324 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 325 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
326 | break; |
327 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 328 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
329 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
330 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
331 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
332 | break; |
333 | case IB_CM_SIDR_REQ_RECEIVED: | |
b9ef520f | 334 | ib_ucm_event_sidr_req_get(ctx, &uvt->resp.u.sidr_req_resp, |
a5b74540 HR |
335 | &evt->param.sidr_req_rcvd); |
336 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
337 | break; |
338 | case IB_CM_SIDR_REP_RECEIVED: | |
339 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
340 | &evt->param.sidr_rep_rcvd); | |
341 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
342 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
343 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
344 | break; |
345 | default: | |
346 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
347 | break; |
348 | } | |
349 | ||
b9ef520f | 350 | if (uvt->data_len) { |
a5b74540 | 351 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
352 | if (!uvt->data) |
353 | goto err1; | |
a5b74540 HR |
354 | |
355 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
356 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
357 | } | |
358 | ||
b9ef520f | 359 | if (uvt->info_len) { |
a5b74540 | 360 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
361 | if (!uvt->info) |
362 | goto err2; | |
a5b74540 HR |
363 | |
364 | memcpy(uvt->info, info, uvt->info_len); | |
365 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
366 | } | |
a5b74540 | 367 | return 0; |
b9ef520f SH |
368 | |
369 | err2: | |
79d81907 | 370 | kfree(uvt->data); |
b9ef520f SH |
371 | err1: |
372 | return -ENOMEM; | |
a5b74540 HR |
373 | } |
374 | ||
375 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
376 | struct ib_cm_event *event) | |
377 | { | |
378 | struct ib_ucm_event *uevent; | |
379 | struct ib_ucm_context *ctx; | |
380 | int result = 0; | |
381 | int id; | |
a5b74540 | 382 | |
b9ef520f | 383 | ctx = cm_id->context; |
a5b74540 HR |
384 | |
385 | if (event->event == IB_CM_REQ_RECEIVED || | |
386 | event->event == IB_CM_SIDR_REQ_RECEIVED) | |
387 | id = IB_UCM_CM_ID_INVALID; | |
b9ef520f SH |
388 | else |
389 | id = ctx->id; | |
a5b74540 HR |
390 | |
391 | uevent = kmalloc(sizeof(*uevent), GFP_KERNEL); | |
b9ef520f SH |
392 | if (!uevent) |
393 | goto err1; | |
a5b74540 HR |
394 | |
395 | memset(uevent, 0, sizeof(*uevent)); | |
a5b74540 HR |
396 | uevent->resp.id = id; |
397 | uevent->resp.event = event->event; | |
398 | ||
b9ef520f | 399 | result = ib_ucm_event_process(ctx, event, uevent); |
a5b74540 | 400 | if (result) |
b9ef520f | 401 | goto err2; |
a5b74540 HR |
402 | |
403 | uevent->ctx = ctx; | |
b9ef520f | 404 | uevent->cm_id = (id == IB_UCM_CM_ID_INVALID) ? cm_id : NULL; |
a5b74540 HR |
405 | |
406 | down(&ctx->file->mutex); | |
a5b74540 HR |
407 | list_add_tail(&uevent->file_list, &ctx->file->events); |
408 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 409 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 410 | up(&ctx->file->mutex); |
b9ef520f SH |
411 | return 0; |
412 | ||
413 | err2: | |
414 | kfree(uevent); | |
415 | err1: | |
416 | /* Destroy new cm_id's */ | |
417 | return (id == IB_UCM_CM_ID_INVALID); | |
a5b74540 HR |
418 | } |
419 | ||
420 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
421 | const char __user *inbuf, | |
422 | int in_len, int out_len) | |
423 | { | |
424 | struct ib_ucm_context *ctx; | |
425 | struct ib_ucm_event_get cmd; | |
426 | struct ib_ucm_event *uevent = NULL; | |
427 | int result = 0; | |
428 | DEFINE_WAIT(wait); | |
429 | ||
430 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
431 | return -ENOSPC; | |
432 | ||
433 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
434 | return -EFAULT; | |
435 | /* | |
436 | * wait | |
437 | */ | |
438 | down(&file->mutex); | |
439 | ||
440 | while (list_empty(&file->events)) { | |
441 | ||
442 | if (file->filp->f_flags & O_NONBLOCK) { | |
443 | result = -EAGAIN; | |
444 | break; | |
445 | } | |
446 | ||
447 | if (signal_pending(current)) { | |
448 | result = -ERESTARTSYS; | |
449 | break; | |
450 | } | |
451 | ||
452 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
453 | ||
454 | up(&file->mutex); | |
455 | schedule(); | |
456 | down(&file->mutex); | |
457 | ||
458 | finish_wait(&file->poll_wait, &wait); | |
459 | } | |
460 | ||
461 | if (result) | |
462 | goto done; | |
463 | ||
464 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
465 | ||
466 | if (!uevent->cm_id) | |
467 | goto user; | |
468 | ||
469 | ctx = ib_ucm_ctx_alloc(file); | |
470 | if (!ctx) { | |
471 | result = -ENOMEM; | |
472 | goto done; | |
473 | } | |
474 | ||
b9ef520f SH |
475 | ctx->cm_id = uevent->cm_id; |
476 | ctx->cm_id->context = ctx; | |
a5b74540 HR |
477 | |
478 | uevent->resp.id = ctx->id; | |
479 | ||
480 | user: | |
481 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
482 | &uevent->resp, sizeof(uevent->resp))) { | |
483 | result = -EFAULT; | |
484 | goto done; | |
485 | } | |
486 | ||
487 | if (uevent->data) { | |
488 | ||
489 | if (cmd.data_len < uevent->data_len) { | |
490 | result = -ENOMEM; | |
491 | goto done; | |
492 | } | |
493 | ||
494 | if (copy_to_user((void __user *)(unsigned long)cmd.data, | |
495 | uevent->data, uevent->data_len)) { | |
496 | result = -EFAULT; | |
497 | goto done; | |
498 | } | |
499 | } | |
500 | ||
501 | if (uevent->info) { | |
502 | ||
503 | if (cmd.info_len < uevent->info_len) { | |
504 | result = -ENOMEM; | |
505 | goto done; | |
506 | } | |
507 | ||
508 | if (copy_to_user((void __user *)(unsigned long)cmd.info, | |
509 | uevent->info, uevent->info_len)) { | |
510 | result = -EFAULT; | |
511 | goto done; | |
512 | } | |
513 | } | |
514 | ||
515 | list_del(&uevent->file_list); | |
516 | list_del(&uevent->ctx_list); | |
517 | ||
79d81907 HR |
518 | kfree(uevent->data); |
519 | kfree(uevent->info); | |
a5b74540 HR |
520 | kfree(uevent); |
521 | done: | |
522 | up(&file->mutex); | |
523 | return result; | |
524 | } | |
525 | ||
526 | ||
527 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, | |
528 | const char __user *inbuf, | |
529 | int in_len, int out_len) | |
530 | { | |
531 | struct ib_ucm_create_id cmd; | |
532 | struct ib_ucm_create_id_resp resp; | |
533 | struct ib_ucm_context *ctx; | |
534 | int result; | |
535 | ||
536 | if (out_len < sizeof(resp)) | |
537 | return -ENOSPC; | |
538 | ||
539 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
540 | return -EFAULT; | |
541 | ||
b9ef520f | 542 | down(&file->mutex); |
a5b74540 | 543 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 544 | up(&file->mutex); |
a5b74540 HR |
545 | if (!ctx) |
546 | return -ENOMEM; | |
547 | ||
b9ef520f SH |
548 | ctx->cm_id = ib_create_cm_id(ib_ucm_event_handler, ctx); |
549 | if (IS_ERR(ctx->cm_id)) { | |
550 | result = PTR_ERR(ctx->cm_id); | |
551 | goto err; | |
a5b74540 HR |
552 | } |
553 | ||
554 | resp.id = ctx->id; | |
555 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
556 | &resp, sizeof(resp))) { | |
557 | result = -EFAULT; | |
b9ef520f | 558 | goto err; |
a5b74540 HR |
559 | } |
560 | ||
561 | return 0; | |
a5b74540 | 562 | |
b9ef520f SH |
563 | err: |
564 | ib_ucm_destroy_ctx(file, ctx->id); | |
a5b74540 HR |
565 | return result; |
566 | } | |
567 | ||
568 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
569 | const char __user *inbuf, | |
570 | int in_len, int out_len) | |
571 | { | |
572 | struct ib_ucm_destroy_id cmd; | |
a5b74540 HR |
573 | |
574 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
575 | return -EFAULT; | |
576 | ||
b9ef520f | 577 | return ib_ucm_destroy_ctx(file, cmd.id); |
a5b74540 HR |
578 | } |
579 | ||
580 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
581 | const char __user *inbuf, | |
582 | int in_len, int out_len) | |
583 | { | |
584 | struct ib_ucm_attr_id_resp resp; | |
585 | struct ib_ucm_attr_id cmd; | |
586 | struct ib_ucm_context *ctx; | |
587 | int result = 0; | |
588 | ||
589 | if (out_len < sizeof(resp)) | |
590 | return -ENOSPC; | |
591 | ||
592 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
593 | return -EFAULT; | |
594 | ||
b9ef520f SH |
595 | ctx = ib_ucm_ctx_get(file, cmd.id); |
596 | if (IS_ERR(ctx)) | |
597 | return PTR_ERR(ctx); | |
a5b74540 HR |
598 | |
599 | resp.service_id = ctx->cm_id->service_id; | |
600 | resp.service_mask = ctx->cm_id->service_mask; | |
601 | resp.local_id = ctx->cm_id->local_id; | |
602 | resp.remote_id = ctx->cm_id->remote_id; | |
603 | ||
604 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
605 | &resp, sizeof(resp))) | |
606 | result = -EFAULT; | |
607 | ||
b9ef520f | 608 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
609 | return result; |
610 | } | |
611 | ||
612 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, | |
613 | const char __user *inbuf, | |
614 | int in_len, int out_len) | |
615 | { | |
616 | struct ib_ucm_listen cmd; | |
617 | struct ib_ucm_context *ctx; | |
618 | int result; | |
619 | ||
620 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
621 | return -EFAULT; | |
622 | ||
b9ef520f SH |
623 | ctx = ib_ucm_ctx_get(file, cmd.id); |
624 | if (IS_ERR(ctx)) | |
625 | return PTR_ERR(ctx); | |
a5b74540 | 626 | |
b9ef520f SH |
627 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
628 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
629 | return result; |
630 | } | |
631 | ||
632 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
633 | const char __user *inbuf, | |
634 | int in_len, int out_len) | |
635 | { | |
636 | struct ib_ucm_establish cmd; | |
637 | struct ib_ucm_context *ctx; | |
638 | int result; | |
639 | ||
640 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
641 | return -EFAULT; | |
642 | ||
b9ef520f SH |
643 | ctx = ib_ucm_ctx_get(file, cmd.id); |
644 | if (IS_ERR(ctx)) | |
645 | return PTR_ERR(ctx); | |
a5b74540 | 646 | |
b9ef520f SH |
647 | result = ib_cm_establish(ctx->cm_id); |
648 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
649 | return result; |
650 | } | |
651 | ||
652 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
653 | { | |
654 | void *data; | |
655 | ||
656 | *dest = NULL; | |
657 | ||
658 | if (!len) | |
659 | return 0; | |
660 | ||
661 | data = kmalloc(len, GFP_KERNEL); | |
662 | if (!data) | |
663 | return -ENOMEM; | |
664 | ||
665 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
666 | kfree(data); | |
667 | return -EFAULT; | |
668 | } | |
669 | ||
670 | *dest = data; | |
671 | return 0; | |
672 | } | |
673 | ||
674 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
675 | { | |
676 | struct ib_ucm_path_rec ucm_path; | |
677 | struct ib_sa_path_rec *sa_path; | |
678 | ||
679 | *path = NULL; | |
680 | ||
681 | if (!src) | |
682 | return 0; | |
683 | ||
684 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
685 | if (!sa_path) | |
686 | return -ENOMEM; | |
687 | ||
688 | if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src, | |
689 | sizeof(ucm_path))) { | |
690 | ||
691 | kfree(sa_path); | |
692 | return -EFAULT; | |
693 | } | |
694 | ||
b9ef520f SH |
695 | memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid); |
696 | memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid); | |
a5b74540 HR |
697 | |
698 | sa_path->dlid = ucm_path.dlid; | |
699 | sa_path->slid = ucm_path.slid; | |
700 | sa_path->raw_traffic = ucm_path.raw_traffic; | |
701 | sa_path->flow_label = ucm_path.flow_label; | |
702 | sa_path->hop_limit = ucm_path.hop_limit; | |
703 | sa_path->traffic_class = ucm_path.traffic_class; | |
704 | sa_path->reversible = ucm_path.reversible; | |
705 | sa_path->numb_path = ucm_path.numb_path; | |
706 | sa_path->pkey = ucm_path.pkey; | |
707 | sa_path->sl = ucm_path.sl; | |
708 | sa_path->mtu_selector = ucm_path.mtu_selector; | |
709 | sa_path->mtu = ucm_path.mtu; | |
710 | sa_path->rate_selector = ucm_path.rate_selector; | |
711 | sa_path->rate = ucm_path.rate; | |
712 | sa_path->packet_life_time = ucm_path.packet_life_time; | |
713 | sa_path->preference = ucm_path.preference; | |
714 | ||
715 | sa_path->packet_life_time_selector = | |
716 | ucm_path.packet_life_time_selector; | |
717 | ||
718 | *path = sa_path; | |
719 | return 0; | |
720 | } | |
721 | ||
722 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
723 | const char __user *inbuf, | |
724 | int in_len, int out_len) | |
725 | { | |
726 | struct ib_cm_req_param param; | |
727 | struct ib_ucm_context *ctx; | |
728 | struct ib_ucm_req cmd; | |
729 | int result; | |
730 | ||
731 | param.private_data = NULL; | |
732 | param.primary_path = NULL; | |
733 | param.alternate_path = NULL; | |
734 | ||
735 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
736 | return -EFAULT; | |
737 | ||
738 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
739 | if (result) | |
740 | goto done; | |
741 | ||
742 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
743 | if (result) | |
744 | goto done; | |
745 | ||
746 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
747 | if (result) | |
748 | goto done; | |
749 | ||
750 | param.private_data_len = cmd.len; | |
751 | param.service_id = cmd.sid; | |
752 | param.qp_num = cmd.qpn; | |
753 | param.qp_type = cmd.qp_type; | |
754 | param.starting_psn = cmd.psn; | |
755 | param.peer_to_peer = cmd.peer_to_peer; | |
756 | param.responder_resources = cmd.responder_resources; | |
757 | param.initiator_depth = cmd.initiator_depth; | |
758 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
759 | param.flow_control = cmd.flow_control; | |
760 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
761 | param.retry_count = cmd.retry_count; | |
762 | param.rnr_retry_count = cmd.rnr_retry_count; | |
763 | param.max_cm_retries = cmd.max_cm_retries; | |
764 | param.srq = cmd.srq; | |
765 | ||
b9ef520f SH |
766 | ctx = ib_ucm_ctx_get(file, cmd.id); |
767 | if (!IS_ERR(ctx)) { | |
a5b74540 | 768 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
769 | ib_ucm_ctx_put(ctx); |
770 | } else | |
771 | result = PTR_ERR(ctx); | |
a5b74540 | 772 | |
a5b74540 | 773 | done: |
79d81907 HR |
774 | kfree(param.private_data); |
775 | kfree(param.primary_path); | |
776 | kfree(param.alternate_path); | |
a5b74540 HR |
777 | return result; |
778 | } | |
779 | ||
780 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
781 | const char __user *inbuf, | |
782 | int in_len, int out_len) | |
783 | { | |
784 | struct ib_cm_rep_param param; | |
785 | struct ib_ucm_context *ctx; | |
786 | struct ib_ucm_rep cmd; | |
787 | int result; | |
788 | ||
789 | param.private_data = NULL; | |
790 | ||
791 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
792 | return -EFAULT; | |
793 | ||
794 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
795 | if (result) | |
796 | return result; | |
797 | ||
798 | param.qp_num = cmd.qpn; | |
799 | param.starting_psn = cmd.psn; | |
800 | param.private_data_len = cmd.len; | |
801 | param.responder_resources = cmd.responder_resources; | |
802 | param.initiator_depth = cmd.initiator_depth; | |
803 | param.target_ack_delay = cmd.target_ack_delay; | |
804 | param.failover_accepted = cmd.failover_accepted; | |
805 | param.flow_control = cmd.flow_control; | |
806 | param.rnr_retry_count = cmd.rnr_retry_count; | |
807 | param.srq = cmd.srq; | |
808 | ||
b9ef520f SH |
809 | ctx = ib_ucm_ctx_get(file, cmd.id); |
810 | if (!IS_ERR(ctx)) { | |
a5b74540 | 811 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
812 | ib_ucm_ctx_put(ctx); |
813 | } else | |
814 | result = PTR_ERR(ctx); | |
a5b74540 | 815 | |
79d81907 | 816 | kfree(param.private_data); |
a5b74540 HR |
817 | return result; |
818 | } | |
819 | ||
820 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
821 | const char __user *inbuf, int in_len, | |
822 | int (*func)(struct ib_cm_id *cm_id, | |
823 | const void *private_data, | |
824 | u8 private_data_len)) | |
825 | { | |
826 | struct ib_ucm_private_data cmd; | |
827 | struct ib_ucm_context *ctx; | |
828 | const void *private_data = NULL; | |
829 | int result; | |
830 | ||
831 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
832 | return -EFAULT; | |
833 | ||
834 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
835 | if (result) | |
836 | return result; | |
837 | ||
b9ef520f SH |
838 | ctx = ib_ucm_ctx_get(file, cmd.id); |
839 | if (!IS_ERR(ctx)) { | |
a5b74540 | 840 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
841 | ib_ucm_ctx_put(ctx); |
842 | } else | |
843 | result = PTR_ERR(ctx); | |
a5b74540 | 844 | |
79d81907 | 845 | kfree(private_data); |
a5b74540 HR |
846 | return result; |
847 | } | |
848 | ||
849 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
850 | const char __user *inbuf, | |
851 | int in_len, int out_len) | |
852 | { | |
853 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
854 | } | |
855 | ||
856 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
857 | const char __user *inbuf, | |
858 | int in_len, int out_len) | |
859 | { | |
860 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
861 | } | |
862 | ||
863 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
864 | const char __user *inbuf, | |
865 | int in_len, int out_len) | |
866 | { | |
867 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
868 | } | |
869 | ||
870 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
871 | const char __user *inbuf, int in_len, | |
872 | int (*func)(struct ib_cm_id *cm_id, | |
873 | int status, | |
874 | const void *info, | |
875 | u8 info_len, | |
876 | const void *data, | |
877 | u8 data_len)) | |
878 | { | |
879 | struct ib_ucm_context *ctx; | |
880 | struct ib_ucm_info cmd; | |
881 | const void *data = NULL; | |
882 | const void *info = NULL; | |
883 | int result; | |
884 | ||
885 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
886 | return -EFAULT; | |
887 | ||
888 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
889 | if (result) | |
890 | goto done; | |
891 | ||
892 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
893 | if (result) | |
894 | goto done; | |
895 | ||
b9ef520f SH |
896 | ctx = ib_ucm_ctx_get(file, cmd.id); |
897 | if (!IS_ERR(ctx)) { | |
898 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 899 | data, cmd.data_len); |
b9ef520f SH |
900 | ib_ucm_ctx_put(ctx); |
901 | } else | |
902 | result = PTR_ERR(ctx); | |
a5b74540 | 903 | |
a5b74540 | 904 | done: |
79d81907 HR |
905 | kfree(data); |
906 | kfree(info); | |
a5b74540 HR |
907 | return result; |
908 | } | |
909 | ||
910 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
911 | const char __user *inbuf, | |
912 | int in_len, int out_len) | |
913 | { | |
914 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
915 | } | |
916 | ||
917 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
918 | const char __user *inbuf, | |
919 | int in_len, int out_len) | |
920 | { | |
921 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
922 | } | |
923 | ||
924 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
925 | const char __user *inbuf, | |
926 | int in_len, int out_len) | |
927 | { | |
928 | struct ib_ucm_context *ctx; | |
929 | struct ib_ucm_mra cmd; | |
930 | const void *data = NULL; | |
931 | int result; | |
932 | ||
933 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
934 | return -EFAULT; | |
935 | ||
936 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
937 | if (result) | |
938 | return result; | |
939 | ||
b9ef520f SH |
940 | ctx = ib_ucm_ctx_get(file, cmd.id); |
941 | if (!IS_ERR(ctx)) { | |
942 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
943 | ib_ucm_ctx_put(ctx); | |
944 | } else | |
945 | result = PTR_ERR(ctx); | |
a5b74540 | 946 | |
79d81907 | 947 | kfree(data); |
a5b74540 HR |
948 | return result; |
949 | } | |
950 | ||
951 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
952 | const char __user *inbuf, | |
953 | int in_len, int out_len) | |
954 | { | |
955 | struct ib_ucm_context *ctx; | |
956 | struct ib_sa_path_rec *path = NULL; | |
957 | struct ib_ucm_lap cmd; | |
958 | const void *data = NULL; | |
959 | int result; | |
960 | ||
961 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
962 | return -EFAULT; | |
963 | ||
964 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
965 | if (result) | |
966 | goto done; | |
967 | ||
968 | result = ib_ucm_path_get(&path, cmd.path); | |
969 | if (result) | |
970 | goto done; | |
971 | ||
b9ef520f SH |
972 | ctx = ib_ucm_ctx_get(file, cmd.id); |
973 | if (!IS_ERR(ctx)) { | |
a5b74540 | 974 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
975 | ib_ucm_ctx_put(ctx); |
976 | } else | |
977 | result = PTR_ERR(ctx); | |
a5b74540 | 978 | |
a5b74540 | 979 | done: |
79d81907 HR |
980 | kfree(data); |
981 | kfree(path); | |
a5b74540 HR |
982 | return result; |
983 | } | |
984 | ||
985 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
986 | const char __user *inbuf, | |
987 | int in_len, int out_len) | |
988 | { | |
989 | struct ib_cm_sidr_req_param param; | |
990 | struct ib_ucm_context *ctx; | |
991 | struct ib_ucm_sidr_req cmd; | |
992 | int result; | |
993 | ||
994 | param.private_data = NULL; | |
995 | param.path = NULL; | |
996 | ||
997 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
998 | return -EFAULT; | |
999 | ||
1000 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1001 | if (result) | |
1002 | goto done; | |
1003 | ||
1004 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1005 | if (result) | |
1006 | goto done; | |
1007 | ||
1008 | param.private_data_len = cmd.len; | |
1009 | param.service_id = cmd.sid; | |
1010 | param.timeout_ms = cmd.timeout; | |
1011 | param.max_cm_retries = cmd.max_cm_retries; | |
1012 | param.pkey = cmd.pkey; | |
1013 | ||
b9ef520f SH |
1014 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1015 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1016 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1017 | ib_ucm_ctx_put(ctx); |
1018 | } else | |
1019 | result = PTR_ERR(ctx); | |
a5b74540 | 1020 | |
a5b74540 | 1021 | done: |
79d81907 HR |
1022 | kfree(param.private_data); |
1023 | kfree(param.path); | |
a5b74540 HR |
1024 | return result; |
1025 | } | |
1026 | ||
1027 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1028 | const char __user *inbuf, | |
1029 | int in_len, int out_len) | |
1030 | { | |
1031 | struct ib_cm_sidr_rep_param param; | |
1032 | struct ib_ucm_sidr_rep cmd; | |
1033 | struct ib_ucm_context *ctx; | |
1034 | int result; | |
1035 | ||
1036 | param.info = NULL; | |
1037 | ||
1038 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1039 | return -EFAULT; | |
1040 | ||
1041 | result = ib_ucm_alloc_data(¶m.private_data, | |
1042 | cmd.data, cmd.data_len); | |
1043 | if (result) | |
1044 | goto done; | |
1045 | ||
1046 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1047 | if (result) | |
1048 | goto done; | |
1049 | ||
b9ef520f SH |
1050 | param.qp_num = cmd.qpn; |
1051 | param.qkey = cmd.qkey; | |
1052 | param.status = cmd.status; | |
1053 | param.info_length = cmd.info_len; | |
1054 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1055 | |
b9ef520f SH |
1056 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1057 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1058 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1059 | ib_ucm_ctx_put(ctx); |
1060 | } else | |
1061 | result = PTR_ERR(ctx); | |
a5b74540 | 1062 | |
a5b74540 | 1063 | done: |
79d81907 HR |
1064 | kfree(param.private_data); |
1065 | kfree(param.info); | |
a5b74540 HR |
1066 | return result; |
1067 | } | |
1068 | ||
1069 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1070 | const char __user *inbuf, | |
1071 | int in_len, int out_len) = { | |
1072 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1073 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1074 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1075 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1076 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1077 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1078 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1079 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1080 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1081 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1082 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1083 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1084 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1085 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1086 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1087 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1088 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
1089 | }; | |
1090 | ||
1091 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1092 | size_t len, loff_t *pos) | |
1093 | { | |
1094 | struct ib_ucm_file *file = filp->private_data; | |
1095 | struct ib_ucm_cmd_hdr hdr; | |
1096 | ssize_t result; | |
1097 | ||
1098 | if (len < sizeof(hdr)) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1102 | return -EFAULT; | |
1103 | ||
79d81907 HR |
1104 | ucm_dbg("Write. cmd <%d> in <%d> out <%d> len <%Zu>\n", |
1105 | hdr.cmd, hdr.in, hdr.out, len); | |
a5b74540 HR |
1106 | |
1107 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | if (hdr.in + sizeof(hdr) > len) | |
1111 | return -EINVAL; | |
1112 | ||
1113 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1114 | hdr.in, hdr.out); | |
1115 | if (!result) | |
1116 | result = len; | |
1117 | ||
1118 | return result; | |
1119 | } | |
1120 | ||
1121 | static unsigned int ib_ucm_poll(struct file *filp, | |
1122 | struct poll_table_struct *wait) | |
1123 | { | |
1124 | struct ib_ucm_file *file = filp->private_data; | |
1125 | unsigned int mask = 0; | |
1126 | ||
1127 | poll_wait(filp, &file->poll_wait, wait); | |
1128 | ||
1129 | if (!list_empty(&file->events)) | |
1130 | mask = POLLIN | POLLRDNORM; | |
1131 | ||
1132 | return mask; | |
1133 | } | |
1134 | ||
1135 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1136 | { | |
1137 | struct ib_ucm_file *file; | |
1138 | ||
1139 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1140 | if (!file) | |
1141 | return -ENOMEM; | |
1142 | ||
1143 | INIT_LIST_HEAD(&file->events); | |
1144 | INIT_LIST_HEAD(&file->ctxs); | |
1145 | init_waitqueue_head(&file->poll_wait); | |
1146 | ||
1147 | init_MUTEX(&file->mutex); | |
1148 | ||
1149 | filp->private_data = file; | |
1150 | file->filp = filp; | |
1151 | ||
79d81907 | 1152 | ucm_dbg("Created struct\n"); |
a5b74540 HR |
1153 | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1158 | { | |
1159 | struct ib_ucm_file *file = filp->private_data; | |
1160 | struct ib_ucm_context *ctx; | |
1161 | ||
1162 | down(&file->mutex); | |
a5b74540 HR |
1163 | while (!list_empty(&file->ctxs)) { |
1164 | ||
1165 | ctx = list_entry(file->ctxs.next, | |
1166 | struct ib_ucm_context, file_list); | |
1167 | ||
b9ef520f SH |
1168 | up(&file->mutex); |
1169 | ib_ucm_destroy_ctx(file, ctx->id); | |
a5b74540 HR |
1170 | down(&file->mutex); |
1171 | } | |
a5b74540 | 1172 | up(&file->mutex); |
a5b74540 | 1173 | kfree(file); |
a5b74540 HR |
1174 | return 0; |
1175 | } | |
1176 | ||
1177 | static struct file_operations ib_ucm_fops = { | |
1178 | .owner = THIS_MODULE, | |
1179 | .open = ib_ucm_open, | |
1180 | .release = ib_ucm_close, | |
1181 | .write = ib_ucm_write, | |
1182 | .poll = ib_ucm_poll, | |
1183 | }; | |
1184 | ||
1185 | ||
2d0d099f | 1186 | static struct class *ib_ucm_class; |
a5b74540 HR |
1187 | static struct cdev ib_ucm_cdev; |
1188 | ||
1189 | static int __init ib_ucm_init(void) | |
1190 | { | |
1191 | int result; | |
1192 | ||
1193 | result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm"); | |
1194 | if (result) { | |
79d81907 | 1195 | ucm_dbg("Error <%d> registering dev\n", result); |
a5b74540 HR |
1196 | goto err_chr; |
1197 | } | |
1198 | ||
1199 | cdev_init(&ib_ucm_cdev, &ib_ucm_fops); | |
1200 | ||
1201 | result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1); | |
1202 | if (result) { | |
79d81907 | 1203 | ucm_dbg("Error <%d> adding cdev\n", result); |
a5b74540 HR |
1204 | goto err_cdev; |
1205 | } | |
1206 | ||
2d0d099f | 1207 | ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm"); |
a5b74540 HR |
1208 | if (IS_ERR(ib_ucm_class)) { |
1209 | result = PTR_ERR(ib_ucm_class); | |
79d81907 | 1210 | ucm_dbg("Error <%d> creating class\n", result); |
a5b74540 HR |
1211 | goto err_class; |
1212 | } | |
1213 | ||
2d0d099f | 1214 | class_device_create(ib_ucm_class, IB_UCM_DEV, NULL, "ucm"); |
a5b74540 HR |
1215 | |
1216 | idr_init(&ctx_id_table); | |
1217 | init_MUTEX(&ctx_id_mutex); | |
1218 | ||
1219 | return 0; | |
1220 | err_class: | |
1221 | cdev_del(&ib_ucm_cdev); | |
1222 | err_cdev: | |
1223 | unregister_chrdev_region(IB_UCM_DEV, 1); | |
1224 | err_chr: | |
1225 | return result; | |
1226 | } | |
1227 | ||
1228 | static void __exit ib_ucm_cleanup(void) | |
1229 | { | |
2d0d099f TD |
1230 | class_device_destroy(ib_ucm_class, IB_UCM_DEV); |
1231 | class_destroy(ib_ucm_class); | |
a5b74540 HR |
1232 | cdev_del(&ib_ucm_cdev); |
1233 | unregister_chrdev_region(IB_UCM_DEV, 1); | |
1234 | } | |
1235 | ||
1236 | module_init(ib_ucm_init); | |
1237 | module_exit(ib_ucm_cleanup); |