Commit | Line | Data |
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a5b74540 HR |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
b9ef520f | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
a5b74540 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | * | |
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; | |
a5b74540 | 75 | |
b9ef520f | 76 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
77 | { |
78 | struct ib_ucm_context *ctx; | |
79 | ||
80 | down(&ctx_id_mutex); | |
81 | ctx = idr_find(&ctx_id_table, id); | |
b9ef520f SH |
82 | if (!ctx) |
83 | ctx = ERR_PTR(-ENOENT); | |
84 | else if (ctx->file != file) | |
85 | ctx = ERR_PTR(-EINVAL); | |
86 | else | |
87 | atomic_inc(&ctx->ref); | |
a5b74540 HR |
88 | up(&ctx_id_mutex); |
89 | ||
90 | return ctx; | |
91 | } | |
92 | ||
93 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
94 | { | |
b9ef520f SH |
95 | if (atomic_dec_and_test(&ctx->ref)) |
96 | wake_up(&ctx->wait); | |
97 | } | |
98 | ||
0b2b35f6 | 99 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 100 | { |
0b2b35f6 SH |
101 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
102 | } | |
b9ef520f | 103 | |
0b2b35f6 SH |
104 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
105 | { | |
106 | struct ib_ucm_event *uevent; | |
a5b74540 | 107 | |
0b2b35f6 | 108 | down(&ctx->file->mutex); |
a5b74540 HR |
109 | list_del(&ctx->file_list); |
110 | while (!list_empty(&ctx->events)) { | |
111 | ||
112 | uevent = list_entry(ctx->events.next, | |
113 | struct ib_ucm_event, ctx_list); | |
114 | list_del(&uevent->file_list); | |
115 | list_del(&uevent->ctx_list); | |
116 | ||
117 | /* clear incoming connections. */ | |
0b2b35f6 | 118 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
119 | ib_destroy_cm_id(uevent->cm_id); |
120 | ||
121 | kfree(uevent); | |
122 | } | |
0b2b35f6 | 123 | up(&ctx->file->mutex); |
a5b74540 HR |
124 | } |
125 | ||
126 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
127 | { | |
128 | struct ib_ucm_context *ctx; | |
129 | int result; | |
130 | ||
131 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); | |
132 | if (!ctx) | |
133 | return NULL; | |
134 | ||
0b2b35f6 | 135 | memset(ctx, 0, sizeof *ctx); |
b9ef520f SH |
136 | atomic_set(&ctx->ref, 1); |
137 | init_waitqueue_head(&ctx->wait); | |
a5b74540 | 138 | ctx->file = file; |
a5b74540 | 139 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 140 | |
0b2b35f6 SH |
141 | do { |
142 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
143 | if (!result) | |
144 | goto error; | |
a5b74540 | 145 | |
0b2b35f6 SH |
146 | down(&ctx_id_mutex); |
147 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); | |
148 | up(&ctx_id_mutex); | |
149 | } while (result == -EAGAIN); | |
a5b74540 | 150 | |
a5b74540 HR |
151 | if (result) |
152 | goto error; | |
153 | ||
0b2b35f6 | 154 | list_add_tail(&ctx->file_list, &file->ctxs); |
79d81907 | 155 | ucm_dbg("Allocated CM ID <%d>\n", ctx->id); |
a5b74540 | 156 | return ctx; |
0b2b35f6 | 157 | |
a5b74540 | 158 | error: |
a5b74540 | 159 | kfree(ctx); |
a5b74540 HR |
160 | return NULL; |
161 | } | |
162 | /* | |
163 | * Event portion of the API, handle CM events | |
164 | * and allow event polling. | |
165 | */ | |
166 | static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath, | |
167 | struct ib_sa_path_rec *kpath) | |
168 | { | |
169 | if (!kpath || !upath) | |
170 | return; | |
171 | ||
b9ef520f SH |
172 | memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid); |
173 | memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid); | |
a5b74540 HR |
174 | |
175 | upath->dlid = kpath->dlid; | |
176 | upath->slid = kpath->slid; | |
177 | upath->raw_traffic = kpath->raw_traffic; | |
178 | upath->flow_label = kpath->flow_label; | |
179 | upath->hop_limit = kpath->hop_limit; | |
180 | upath->traffic_class = kpath->traffic_class; | |
181 | upath->reversible = kpath->reversible; | |
182 | upath->numb_path = kpath->numb_path; | |
183 | upath->pkey = kpath->pkey; | |
184 | upath->sl = kpath->sl; | |
185 | upath->mtu_selector = kpath->mtu_selector; | |
186 | upath->mtu = kpath->mtu; | |
187 | upath->rate_selector = kpath->rate_selector; | |
188 | upath->rate = kpath->rate; | |
189 | upath->packet_life_time = kpath->packet_life_time; | |
190 | upath->preference = kpath->preference; | |
191 | ||
192 | upath->packet_life_time_selector = | |
193 | kpath->packet_life_time_selector; | |
194 | } | |
195 | ||
0b2b35f6 | 196 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
197 | struct ib_cm_req_event_param *kreq) |
198 | { | |
a5b74540 HR |
199 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
200 | ureq->remote_qkey = kreq->remote_qkey; | |
201 | ureq->remote_qpn = kreq->remote_qpn; | |
202 | ureq->qp_type = kreq->qp_type; | |
203 | ureq->starting_psn = kreq->starting_psn; | |
204 | ureq->responder_resources = kreq->responder_resources; | |
205 | ureq->initiator_depth = kreq->initiator_depth; | |
206 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
207 | ureq->flow_control = kreq->flow_control; | |
208 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
209 | ureq->retry_count = kreq->retry_count; | |
210 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
211 | ureq->srq = kreq->srq; | |
212 | ||
213 | ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path); | |
214 | ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path); | |
215 | } | |
216 | ||
217 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
218 | struct ib_cm_rep_event_param *krep) | |
219 | { | |
220 | urep->remote_ca_guid = krep->remote_ca_guid; | |
221 | urep->remote_qkey = krep->remote_qkey; | |
222 | urep->remote_qpn = krep->remote_qpn; | |
223 | urep->starting_psn = krep->starting_psn; | |
224 | urep->responder_resources = krep->responder_resources; | |
225 | urep->initiator_depth = krep->initiator_depth; | |
226 | urep->target_ack_delay = krep->target_ack_delay; | |
227 | urep->failover_accepted = krep->failover_accepted; | |
228 | urep->flow_control = krep->flow_control; | |
229 | urep->rnr_retry_count = krep->rnr_retry_count; | |
230 | urep->srq = krep->srq; | |
231 | } | |
232 | ||
a5b74540 HR |
233 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
234 | struct ib_cm_sidr_rep_event_param *krep) | |
235 | { | |
236 | urep->status = krep->status; | |
237 | urep->qkey = krep->qkey; | |
238 | urep->qpn = krep->qpn; | |
239 | }; | |
240 | ||
0b2b35f6 | 241 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
242 | struct ib_ucm_event *uvt) |
243 | { | |
244 | void *info = NULL; | |
a5b74540 HR |
245 | |
246 | switch (evt->event) { | |
247 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 248 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
249 | &evt->param.req_rcvd); |
250 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 251 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
252 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
253 | IB_UCM_PRES_ALTERNATE : 0); | |
254 | break; | |
255 | case IB_CM_REP_RECEIVED: | |
256 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
257 | &evt->param.rep_rcvd); | |
258 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
259 | break; |
260 | case IB_CM_RTU_RECEIVED: | |
261 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
262 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
263 | break; |
264 | case IB_CM_DREQ_RECEIVED: | |
265 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
266 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
267 | break; |
268 | case IB_CM_DREP_RECEIVED: | |
269 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
270 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
271 | break; |
272 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
273 | uvt->resp.u.mra_resp.timeout = |
274 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 275 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
276 | break; |
277 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 278 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
279 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
280 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
281 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
282 | break; |
283 | case IB_CM_LAP_RECEIVED: | |
b9ef520f SH |
284 | ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path, |
285 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 286 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 287 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
288 | break; |
289 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 290 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
291 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
292 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
293 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
294 | break; |
295 | case IB_CM_SIDR_REQ_RECEIVED: | |
0b2b35f6 SH |
296 | uvt->resp.u.sidr_req_resp.pkey = |
297 | evt->param.sidr_req_rcvd.pkey; | |
a5b74540 | 298 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
299 | break; |
300 | case IB_CM_SIDR_REP_RECEIVED: | |
301 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
302 | &evt->param.sidr_rep_rcvd); | |
303 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
304 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
305 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
306 | break; |
307 | default: | |
308 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
309 | break; |
310 | } | |
311 | ||
b9ef520f | 312 | if (uvt->data_len) { |
a5b74540 | 313 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
314 | if (!uvt->data) |
315 | goto err1; | |
a5b74540 HR |
316 | |
317 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
318 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
319 | } | |
320 | ||
b9ef520f | 321 | if (uvt->info_len) { |
a5b74540 | 322 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
323 | if (!uvt->info) |
324 | goto err2; | |
a5b74540 HR |
325 | |
326 | memcpy(uvt->info, info, uvt->info_len); | |
327 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
328 | } | |
a5b74540 | 329 | return 0; |
b9ef520f SH |
330 | |
331 | err2: | |
79d81907 | 332 | kfree(uvt->data); |
b9ef520f SH |
333 | err1: |
334 | return -ENOMEM; | |
a5b74540 HR |
335 | } |
336 | ||
337 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
338 | struct ib_cm_event *event) | |
339 | { | |
340 | struct ib_ucm_event *uevent; | |
341 | struct ib_ucm_context *ctx; | |
342 | int result = 0; | |
a5b74540 | 343 | |
b9ef520f | 344 | ctx = cm_id->context; |
a5b74540 | 345 | |
a5b74540 | 346 | uevent = kmalloc(sizeof(*uevent), GFP_KERNEL); |
b9ef520f SH |
347 | if (!uevent) |
348 | goto err1; | |
a5b74540 HR |
349 | |
350 | memset(uevent, 0, sizeof(*uevent)); | |
0b2b35f6 SH |
351 | uevent->ctx = ctx; |
352 | uevent->cm_id = cm_id; | |
353 | uevent->resp.uid = ctx->uid; | |
354 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
355 | uevent->resp.event = event->event; |
356 | ||
0b2b35f6 | 357 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 358 | if (result) |
b9ef520f | 359 | goto err2; |
a5b74540 | 360 | |
a5b74540 | 361 | down(&ctx->file->mutex); |
a5b74540 HR |
362 | list_add_tail(&uevent->file_list, &ctx->file->events); |
363 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 364 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 365 | up(&ctx->file->mutex); |
b9ef520f SH |
366 | return 0; |
367 | ||
368 | err2: | |
369 | kfree(uevent); | |
370 | err1: | |
371 | /* Destroy new cm_id's */ | |
0b2b35f6 | 372 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
373 | } |
374 | ||
375 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
376 | const char __user *inbuf, | |
377 | int in_len, int out_len) | |
378 | { | |
379 | struct ib_ucm_context *ctx; | |
380 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 381 | struct ib_ucm_event *uevent; |
a5b74540 HR |
382 | int result = 0; |
383 | DEFINE_WAIT(wait); | |
384 | ||
385 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
386 | return -ENOSPC; | |
387 | ||
388 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
389 | return -EFAULT; | |
390 | /* | |
391 | * wait | |
392 | */ | |
393 | down(&file->mutex); | |
a5b74540 HR |
394 | while (list_empty(&file->events)) { |
395 | ||
396 | if (file->filp->f_flags & O_NONBLOCK) { | |
397 | result = -EAGAIN; | |
398 | break; | |
399 | } | |
400 | ||
401 | if (signal_pending(current)) { | |
402 | result = -ERESTARTSYS; | |
403 | break; | |
404 | } | |
405 | ||
406 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
407 | ||
408 | up(&file->mutex); | |
409 | schedule(); | |
410 | down(&file->mutex); | |
411 | ||
412 | finish_wait(&file->poll_wait, &wait); | |
413 | } | |
414 | ||
415 | if (result) | |
416 | goto done; | |
417 | ||
418 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
419 | ||
0b2b35f6 SH |
420 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
421 | ctx = ib_ucm_ctx_alloc(file); | |
422 | if (!ctx) { | |
423 | result = -ENOMEM; | |
424 | goto done; | |
425 | } | |
a5b74540 | 426 | |
0b2b35f6 SH |
427 | ctx->cm_id = uevent->cm_id; |
428 | ctx->cm_id->context = ctx; | |
429 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
430 | } |
431 | ||
a5b74540 HR |
432 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
433 | &uevent->resp, sizeof(uevent->resp))) { | |
434 | result = -EFAULT; | |
435 | goto done; | |
436 | } | |
437 | ||
438 | if (uevent->data) { | |
a5b74540 HR |
439 | if (cmd.data_len < uevent->data_len) { |
440 | result = -ENOMEM; | |
441 | goto done; | |
442 | } | |
a5b74540 HR |
443 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
444 | uevent->data, uevent->data_len)) { | |
445 | result = -EFAULT; | |
446 | goto done; | |
447 | } | |
448 | } | |
449 | ||
450 | if (uevent->info) { | |
a5b74540 HR |
451 | if (cmd.info_len < uevent->info_len) { |
452 | result = -ENOMEM; | |
453 | goto done; | |
454 | } | |
a5b74540 HR |
455 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
456 | uevent->info, uevent->info_len)) { | |
457 | result = -EFAULT; | |
458 | goto done; | |
459 | } | |
460 | } | |
461 | ||
462 | list_del(&uevent->file_list); | |
463 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 464 | uevent->ctx->events_reported++; |
a5b74540 | 465 | |
79d81907 HR |
466 | kfree(uevent->data); |
467 | kfree(uevent->info); | |
a5b74540 HR |
468 | kfree(uevent); |
469 | done: | |
470 | up(&file->mutex); | |
471 | return result; | |
472 | } | |
473 | ||
474 | ||
475 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, | |
476 | const char __user *inbuf, | |
477 | int in_len, int out_len) | |
478 | { | |
479 | struct ib_ucm_create_id cmd; | |
480 | struct ib_ucm_create_id_resp resp; | |
481 | struct ib_ucm_context *ctx; | |
482 | int result; | |
483 | ||
484 | if (out_len < sizeof(resp)) | |
485 | return -ENOSPC; | |
486 | ||
487 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
488 | return -EFAULT; | |
489 | ||
b9ef520f | 490 | down(&file->mutex); |
a5b74540 | 491 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 492 | up(&file->mutex); |
a5b74540 HR |
493 | if (!ctx) |
494 | return -ENOMEM; | |
495 | ||
0b2b35f6 | 496 | ctx->uid = cmd.uid; |
b9ef520f SH |
497 | ctx->cm_id = ib_create_cm_id(ib_ucm_event_handler, ctx); |
498 | if (IS_ERR(ctx->cm_id)) { | |
499 | result = PTR_ERR(ctx->cm_id); | |
500 | goto err; | |
a5b74540 HR |
501 | } |
502 | ||
503 | resp.id = ctx->id; | |
504 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
505 | &resp, sizeof(resp))) { | |
506 | result = -EFAULT; | |
b9ef520f | 507 | goto err; |
a5b74540 HR |
508 | } |
509 | ||
510 | return 0; | |
a5b74540 | 511 | |
b9ef520f | 512 | err: |
0b2b35f6 SH |
513 | down(&ctx_id_mutex); |
514 | idr_remove(&ctx_id_table, ctx->id); | |
515 | up(&ctx_id_mutex); | |
516 | ||
517 | if (!IS_ERR(ctx->cm_id)) | |
518 | ib_destroy_cm_id(ctx->cm_id); | |
519 | ||
520 | kfree(ctx); | |
a5b74540 HR |
521 | return result; |
522 | } | |
523 | ||
524 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
525 | const char __user *inbuf, | |
526 | int in_len, int out_len) | |
527 | { | |
528 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
529 | struct ib_ucm_destroy_id_resp resp; |
530 | struct ib_ucm_context *ctx; | |
531 | int result = 0; | |
532 | ||
533 | if (out_len < sizeof(resp)) | |
534 | return -ENOSPC; | |
a5b74540 HR |
535 | |
536 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
537 | return -EFAULT; | |
538 | ||
0b2b35f6 SH |
539 | down(&ctx_id_mutex); |
540 | ctx = idr_find(&ctx_id_table, cmd.id); | |
541 | if (!ctx) | |
542 | ctx = ERR_PTR(-ENOENT); | |
543 | else if (ctx->file != file) | |
544 | ctx = ERR_PTR(-EINVAL); | |
545 | else | |
546 | idr_remove(&ctx_id_table, ctx->id); | |
547 | up(&ctx_id_mutex); | |
548 | ||
549 | if (IS_ERR(ctx)) | |
550 | return PTR_ERR(ctx); | |
551 | ||
552 | atomic_dec(&ctx->ref); | |
553 | wait_event(ctx->wait, !atomic_read(&ctx->ref)); | |
554 | ||
555 | /* No new events will be generated after destroying the cm_id. */ | |
556 | ib_destroy_cm_id(ctx->cm_id); | |
557 | /* Cleanup events not yet reported to the user. */ | |
558 | ib_ucm_cleanup_events(ctx); | |
559 | ||
560 | resp.events_reported = ctx->events_reported; | |
561 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
562 | &resp, sizeof(resp))) | |
563 | result = -EFAULT; | |
564 | ||
565 | kfree(ctx); | |
566 | return result; | |
a5b74540 HR |
567 | } |
568 | ||
569 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
570 | const char __user *inbuf, | |
571 | int in_len, int out_len) | |
572 | { | |
573 | struct ib_ucm_attr_id_resp resp; | |
574 | struct ib_ucm_attr_id cmd; | |
575 | struct ib_ucm_context *ctx; | |
576 | int result = 0; | |
577 | ||
578 | if (out_len < sizeof(resp)) | |
579 | return -ENOSPC; | |
580 | ||
581 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
582 | return -EFAULT; | |
583 | ||
b9ef520f SH |
584 | ctx = ib_ucm_ctx_get(file, cmd.id); |
585 | if (IS_ERR(ctx)) | |
586 | return PTR_ERR(ctx); | |
a5b74540 HR |
587 | |
588 | resp.service_id = ctx->cm_id->service_id; | |
589 | resp.service_mask = ctx->cm_id->service_mask; | |
590 | resp.local_id = ctx->cm_id->local_id; | |
591 | resp.remote_id = ctx->cm_id->remote_id; | |
592 | ||
593 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
594 | &resp, sizeof(resp))) | |
595 | result = -EFAULT; | |
596 | ||
b9ef520f | 597 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
598 | return result; |
599 | } | |
600 | ||
0b2b35f6 SH |
601 | static void ib_ucm_copy_ah_attr(struct ib_ucm_ah_attr *dest_attr, |
602 | struct ib_ah_attr *src_attr) | |
603 | { | |
604 | memcpy(dest_attr->grh_dgid, src_attr->grh.dgid.raw, | |
605 | sizeof src_attr->grh.dgid); | |
606 | dest_attr->grh_flow_label = src_attr->grh.flow_label; | |
607 | dest_attr->grh_sgid_index = src_attr->grh.sgid_index; | |
608 | dest_attr->grh_hop_limit = src_attr->grh.hop_limit; | |
609 | dest_attr->grh_traffic_class = src_attr->grh.traffic_class; | |
610 | ||
611 | dest_attr->dlid = src_attr->dlid; | |
612 | dest_attr->sl = src_attr->sl; | |
613 | dest_attr->src_path_bits = src_attr->src_path_bits; | |
614 | dest_attr->static_rate = src_attr->static_rate; | |
615 | dest_attr->is_global = (src_attr->ah_flags & IB_AH_GRH); | |
616 | dest_attr->port_num = src_attr->port_num; | |
617 | } | |
618 | ||
619 | static void ib_ucm_copy_qp_attr(struct ib_ucm_init_qp_attr_resp *dest_attr, | |
620 | struct ib_qp_attr *src_attr) | |
621 | { | |
622 | dest_attr->cur_qp_state = src_attr->cur_qp_state; | |
623 | dest_attr->path_mtu = src_attr->path_mtu; | |
624 | dest_attr->path_mig_state = src_attr->path_mig_state; | |
625 | dest_attr->qkey = src_attr->qkey; | |
626 | dest_attr->rq_psn = src_attr->rq_psn; | |
627 | dest_attr->sq_psn = src_attr->sq_psn; | |
628 | dest_attr->dest_qp_num = src_attr->dest_qp_num; | |
629 | dest_attr->qp_access_flags = src_attr->qp_access_flags; | |
630 | ||
631 | dest_attr->max_send_wr = src_attr->cap.max_send_wr; | |
632 | dest_attr->max_recv_wr = src_attr->cap.max_recv_wr; | |
633 | dest_attr->max_send_sge = src_attr->cap.max_send_sge; | |
634 | dest_attr->max_recv_sge = src_attr->cap.max_recv_sge; | |
635 | dest_attr->max_inline_data = src_attr->cap.max_inline_data; | |
636 | ||
637 | ib_ucm_copy_ah_attr(&dest_attr->ah_attr, &src_attr->ah_attr); | |
638 | ib_ucm_copy_ah_attr(&dest_attr->alt_ah_attr, &src_attr->alt_ah_attr); | |
639 | ||
640 | dest_attr->pkey_index = src_attr->pkey_index; | |
641 | dest_attr->alt_pkey_index = src_attr->alt_pkey_index; | |
642 | dest_attr->en_sqd_async_notify = src_attr->en_sqd_async_notify; | |
643 | dest_attr->sq_draining = src_attr->sq_draining; | |
644 | dest_attr->max_rd_atomic = src_attr->max_rd_atomic; | |
645 | dest_attr->max_dest_rd_atomic = src_attr->max_dest_rd_atomic; | |
646 | dest_attr->min_rnr_timer = src_attr->min_rnr_timer; | |
647 | dest_attr->port_num = src_attr->port_num; | |
648 | dest_attr->timeout = src_attr->timeout; | |
649 | dest_attr->retry_cnt = src_attr->retry_cnt; | |
650 | dest_attr->rnr_retry = src_attr->rnr_retry; | |
651 | dest_attr->alt_port_num = src_attr->alt_port_num; | |
652 | dest_attr->alt_timeout = src_attr->alt_timeout; | |
653 | } | |
654 | ||
655 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, | |
656 | const char __user *inbuf, | |
657 | int in_len, int out_len) | |
658 | { | |
659 | struct ib_ucm_init_qp_attr_resp resp; | |
660 | struct ib_ucm_init_qp_attr cmd; | |
661 | struct ib_ucm_context *ctx; | |
662 | struct ib_qp_attr qp_attr; | |
663 | int result = 0; | |
664 | ||
665 | if (out_len < sizeof(resp)) | |
666 | return -ENOSPC; | |
667 | ||
668 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
669 | return -EFAULT; | |
670 | ||
671 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
672 | if (IS_ERR(ctx)) | |
673 | return PTR_ERR(ctx); | |
674 | ||
675 | resp.qp_attr_mask = 0; | |
676 | memset(&qp_attr, 0, sizeof qp_attr); | |
677 | qp_attr.qp_state = cmd.qp_state; | |
678 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
679 | if (result) | |
680 | goto out; | |
681 | ||
682 | ib_ucm_copy_qp_attr(&resp, &qp_attr); | |
683 | ||
684 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
685 | &resp, sizeof(resp))) | |
686 | result = -EFAULT; | |
687 | ||
688 | out: | |
689 | ib_ucm_ctx_put(ctx); | |
690 | return result; | |
691 | } | |
692 | ||
a5b74540 HR |
693 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
694 | const char __user *inbuf, | |
695 | int in_len, int out_len) | |
696 | { | |
697 | struct ib_ucm_listen cmd; | |
698 | struct ib_ucm_context *ctx; | |
699 | int result; | |
700 | ||
701 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
702 | return -EFAULT; | |
703 | ||
b9ef520f SH |
704 | ctx = ib_ucm_ctx_get(file, cmd.id); |
705 | if (IS_ERR(ctx)) | |
706 | return PTR_ERR(ctx); | |
a5b74540 | 707 | |
b9ef520f SH |
708 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
709 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
710 | return result; |
711 | } | |
712 | ||
713 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
714 | const char __user *inbuf, | |
715 | int in_len, int out_len) | |
716 | { | |
717 | struct ib_ucm_establish cmd; | |
718 | struct ib_ucm_context *ctx; | |
719 | int result; | |
720 | ||
721 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
722 | return -EFAULT; | |
723 | ||
b9ef520f SH |
724 | ctx = ib_ucm_ctx_get(file, cmd.id); |
725 | if (IS_ERR(ctx)) | |
726 | return PTR_ERR(ctx); | |
a5b74540 | 727 | |
b9ef520f SH |
728 | result = ib_cm_establish(ctx->cm_id); |
729 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
730 | return result; |
731 | } | |
732 | ||
733 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
734 | { | |
735 | void *data; | |
736 | ||
737 | *dest = NULL; | |
738 | ||
739 | if (!len) | |
740 | return 0; | |
741 | ||
742 | data = kmalloc(len, GFP_KERNEL); | |
743 | if (!data) | |
744 | return -ENOMEM; | |
745 | ||
746 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
747 | kfree(data); | |
748 | return -EFAULT; | |
749 | } | |
750 | ||
751 | *dest = data; | |
752 | return 0; | |
753 | } | |
754 | ||
755 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
756 | { | |
757 | struct ib_ucm_path_rec ucm_path; | |
758 | struct ib_sa_path_rec *sa_path; | |
759 | ||
760 | *path = NULL; | |
761 | ||
762 | if (!src) | |
763 | return 0; | |
764 | ||
765 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
766 | if (!sa_path) | |
767 | return -ENOMEM; | |
768 | ||
769 | if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src, | |
770 | sizeof(ucm_path))) { | |
771 | ||
772 | kfree(sa_path); | |
773 | return -EFAULT; | |
774 | } | |
775 | ||
b9ef520f SH |
776 | memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid); |
777 | memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid); | |
a5b74540 HR |
778 | |
779 | sa_path->dlid = ucm_path.dlid; | |
780 | sa_path->slid = ucm_path.slid; | |
781 | sa_path->raw_traffic = ucm_path.raw_traffic; | |
782 | sa_path->flow_label = ucm_path.flow_label; | |
783 | sa_path->hop_limit = ucm_path.hop_limit; | |
784 | sa_path->traffic_class = ucm_path.traffic_class; | |
785 | sa_path->reversible = ucm_path.reversible; | |
786 | sa_path->numb_path = ucm_path.numb_path; | |
787 | sa_path->pkey = ucm_path.pkey; | |
788 | sa_path->sl = ucm_path.sl; | |
789 | sa_path->mtu_selector = ucm_path.mtu_selector; | |
790 | sa_path->mtu = ucm_path.mtu; | |
791 | sa_path->rate_selector = ucm_path.rate_selector; | |
792 | sa_path->rate = ucm_path.rate; | |
793 | sa_path->packet_life_time = ucm_path.packet_life_time; | |
794 | sa_path->preference = ucm_path.preference; | |
795 | ||
796 | sa_path->packet_life_time_selector = | |
797 | ucm_path.packet_life_time_selector; | |
798 | ||
799 | *path = sa_path; | |
800 | return 0; | |
801 | } | |
802 | ||
803 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
804 | const char __user *inbuf, | |
805 | int in_len, int out_len) | |
806 | { | |
807 | struct ib_cm_req_param param; | |
808 | struct ib_ucm_context *ctx; | |
809 | struct ib_ucm_req cmd; | |
810 | int result; | |
811 | ||
812 | param.private_data = NULL; | |
813 | param.primary_path = NULL; | |
814 | param.alternate_path = NULL; | |
815 | ||
816 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
817 | return -EFAULT; | |
818 | ||
819 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
820 | if (result) | |
821 | goto done; | |
822 | ||
823 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
824 | if (result) | |
825 | goto done; | |
826 | ||
827 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
828 | if (result) | |
829 | goto done; | |
830 | ||
831 | param.private_data_len = cmd.len; | |
832 | param.service_id = cmd.sid; | |
833 | param.qp_num = cmd.qpn; | |
834 | param.qp_type = cmd.qp_type; | |
835 | param.starting_psn = cmd.psn; | |
836 | param.peer_to_peer = cmd.peer_to_peer; | |
837 | param.responder_resources = cmd.responder_resources; | |
838 | param.initiator_depth = cmd.initiator_depth; | |
839 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
840 | param.flow_control = cmd.flow_control; | |
841 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
842 | param.retry_count = cmd.retry_count; | |
843 | param.rnr_retry_count = cmd.rnr_retry_count; | |
844 | param.max_cm_retries = cmd.max_cm_retries; | |
845 | param.srq = cmd.srq; | |
846 | ||
b9ef520f SH |
847 | ctx = ib_ucm_ctx_get(file, cmd.id); |
848 | if (!IS_ERR(ctx)) { | |
a5b74540 | 849 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
850 | ib_ucm_ctx_put(ctx); |
851 | } else | |
852 | result = PTR_ERR(ctx); | |
a5b74540 | 853 | |
a5b74540 | 854 | done: |
79d81907 HR |
855 | kfree(param.private_data); |
856 | kfree(param.primary_path); | |
857 | kfree(param.alternate_path); | |
a5b74540 HR |
858 | return result; |
859 | } | |
860 | ||
861 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
862 | const char __user *inbuf, | |
863 | int in_len, int out_len) | |
864 | { | |
865 | struct ib_cm_rep_param param; | |
866 | struct ib_ucm_context *ctx; | |
867 | struct ib_ucm_rep cmd; | |
868 | int result; | |
869 | ||
870 | param.private_data = NULL; | |
871 | ||
872 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
873 | return -EFAULT; | |
874 | ||
875 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
876 | if (result) | |
877 | return result; | |
878 | ||
879 | param.qp_num = cmd.qpn; | |
880 | param.starting_psn = cmd.psn; | |
881 | param.private_data_len = cmd.len; | |
882 | param.responder_resources = cmd.responder_resources; | |
883 | param.initiator_depth = cmd.initiator_depth; | |
884 | param.target_ack_delay = cmd.target_ack_delay; | |
885 | param.failover_accepted = cmd.failover_accepted; | |
886 | param.flow_control = cmd.flow_control; | |
887 | param.rnr_retry_count = cmd.rnr_retry_count; | |
888 | param.srq = cmd.srq; | |
889 | ||
b9ef520f SH |
890 | ctx = ib_ucm_ctx_get(file, cmd.id); |
891 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 892 | ctx->uid = cmd.uid; |
a5b74540 | 893 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
894 | ib_ucm_ctx_put(ctx); |
895 | } else | |
896 | result = PTR_ERR(ctx); | |
a5b74540 | 897 | |
79d81907 | 898 | kfree(param.private_data); |
a5b74540 HR |
899 | return result; |
900 | } | |
901 | ||
902 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
903 | const char __user *inbuf, int in_len, | |
904 | int (*func)(struct ib_cm_id *cm_id, | |
905 | const void *private_data, | |
906 | u8 private_data_len)) | |
907 | { | |
908 | struct ib_ucm_private_data cmd; | |
909 | struct ib_ucm_context *ctx; | |
910 | const void *private_data = NULL; | |
911 | int result; | |
912 | ||
913 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
914 | return -EFAULT; | |
915 | ||
916 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
917 | if (result) | |
918 | return result; | |
919 | ||
b9ef520f SH |
920 | ctx = ib_ucm_ctx_get(file, cmd.id); |
921 | if (!IS_ERR(ctx)) { | |
a5b74540 | 922 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
923 | ib_ucm_ctx_put(ctx); |
924 | } else | |
925 | result = PTR_ERR(ctx); | |
a5b74540 | 926 | |
79d81907 | 927 | kfree(private_data); |
a5b74540 HR |
928 | return result; |
929 | } | |
930 | ||
931 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
932 | const char __user *inbuf, | |
933 | int in_len, int out_len) | |
934 | { | |
935 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
936 | } | |
937 | ||
938 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
939 | const char __user *inbuf, | |
940 | int in_len, int out_len) | |
941 | { | |
942 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
943 | } | |
944 | ||
945 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
946 | const char __user *inbuf, | |
947 | int in_len, int out_len) | |
948 | { | |
949 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
950 | } | |
951 | ||
952 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
953 | const char __user *inbuf, int in_len, | |
954 | int (*func)(struct ib_cm_id *cm_id, | |
955 | int status, | |
956 | const void *info, | |
957 | u8 info_len, | |
958 | const void *data, | |
959 | u8 data_len)) | |
960 | { | |
961 | struct ib_ucm_context *ctx; | |
962 | struct ib_ucm_info cmd; | |
963 | const void *data = NULL; | |
964 | const void *info = NULL; | |
965 | int result; | |
966 | ||
967 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
968 | return -EFAULT; | |
969 | ||
970 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
971 | if (result) | |
972 | goto done; | |
973 | ||
974 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
975 | if (result) | |
976 | goto done; | |
977 | ||
b9ef520f SH |
978 | ctx = ib_ucm_ctx_get(file, cmd.id); |
979 | if (!IS_ERR(ctx)) { | |
980 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 981 | data, cmd.data_len); |
b9ef520f SH |
982 | ib_ucm_ctx_put(ctx); |
983 | } else | |
984 | result = PTR_ERR(ctx); | |
a5b74540 | 985 | |
a5b74540 | 986 | done: |
79d81907 HR |
987 | kfree(data); |
988 | kfree(info); | |
a5b74540 HR |
989 | return result; |
990 | } | |
991 | ||
992 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
993 | const char __user *inbuf, | |
994 | int in_len, int out_len) | |
995 | { | |
996 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
997 | } | |
998 | ||
999 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
1000 | const char __user *inbuf, | |
1001 | int in_len, int out_len) | |
1002 | { | |
1003 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
1004 | } | |
1005 | ||
1006 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
1007 | const char __user *inbuf, | |
1008 | int in_len, int out_len) | |
1009 | { | |
1010 | struct ib_ucm_context *ctx; | |
1011 | struct ib_ucm_mra cmd; | |
1012 | const void *data = NULL; | |
1013 | int result; | |
1014 | ||
1015 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1016 | return -EFAULT; | |
1017 | ||
1018 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1019 | if (result) | |
1020 | return result; | |
1021 | ||
b9ef520f SH |
1022 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1023 | if (!IS_ERR(ctx)) { | |
1024 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
1025 | ib_ucm_ctx_put(ctx); | |
1026 | } else | |
1027 | result = PTR_ERR(ctx); | |
a5b74540 | 1028 | |
79d81907 | 1029 | kfree(data); |
a5b74540 HR |
1030 | return result; |
1031 | } | |
1032 | ||
1033 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
1034 | const char __user *inbuf, | |
1035 | int in_len, int out_len) | |
1036 | { | |
1037 | struct ib_ucm_context *ctx; | |
1038 | struct ib_sa_path_rec *path = NULL; | |
1039 | struct ib_ucm_lap cmd; | |
1040 | const void *data = NULL; | |
1041 | int result; | |
1042 | ||
1043 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1044 | return -EFAULT; | |
1045 | ||
1046 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1047 | if (result) | |
1048 | goto done; | |
1049 | ||
1050 | result = ib_ucm_path_get(&path, cmd.path); | |
1051 | if (result) | |
1052 | goto done; | |
1053 | ||
b9ef520f SH |
1054 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1055 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1056 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
1057 | ib_ucm_ctx_put(ctx); |
1058 | } else | |
1059 | result = PTR_ERR(ctx); | |
a5b74540 | 1060 | |
a5b74540 | 1061 | done: |
79d81907 HR |
1062 | kfree(data); |
1063 | kfree(path); | |
a5b74540 HR |
1064 | return result; |
1065 | } | |
1066 | ||
1067 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1068 | const char __user *inbuf, | |
1069 | int in_len, int out_len) | |
1070 | { | |
1071 | struct ib_cm_sidr_req_param param; | |
1072 | struct ib_ucm_context *ctx; | |
1073 | struct ib_ucm_sidr_req cmd; | |
1074 | int result; | |
1075 | ||
1076 | param.private_data = NULL; | |
1077 | param.path = NULL; | |
1078 | ||
1079 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1080 | return -EFAULT; | |
1081 | ||
1082 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1083 | if (result) | |
1084 | goto done; | |
1085 | ||
1086 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1087 | if (result) | |
1088 | goto done; | |
1089 | ||
1090 | param.private_data_len = cmd.len; | |
1091 | param.service_id = cmd.sid; | |
1092 | param.timeout_ms = cmd.timeout; | |
1093 | param.max_cm_retries = cmd.max_cm_retries; | |
1094 | param.pkey = cmd.pkey; | |
1095 | ||
b9ef520f SH |
1096 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1097 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1098 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1099 | ib_ucm_ctx_put(ctx); |
1100 | } else | |
1101 | result = PTR_ERR(ctx); | |
a5b74540 | 1102 | |
a5b74540 | 1103 | done: |
79d81907 HR |
1104 | kfree(param.private_data); |
1105 | kfree(param.path); | |
a5b74540 HR |
1106 | return result; |
1107 | } | |
1108 | ||
1109 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1110 | const char __user *inbuf, | |
1111 | int in_len, int out_len) | |
1112 | { | |
1113 | struct ib_cm_sidr_rep_param param; | |
1114 | struct ib_ucm_sidr_rep cmd; | |
1115 | struct ib_ucm_context *ctx; | |
1116 | int result; | |
1117 | ||
1118 | param.info = NULL; | |
1119 | ||
1120 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1121 | return -EFAULT; | |
1122 | ||
1123 | result = ib_ucm_alloc_data(¶m.private_data, | |
1124 | cmd.data, cmd.data_len); | |
1125 | if (result) | |
1126 | goto done; | |
1127 | ||
1128 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1129 | if (result) | |
1130 | goto done; | |
1131 | ||
b9ef520f SH |
1132 | param.qp_num = cmd.qpn; |
1133 | param.qkey = cmd.qkey; | |
1134 | param.status = cmd.status; | |
1135 | param.info_length = cmd.info_len; | |
1136 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1137 | |
b9ef520f SH |
1138 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1139 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1140 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1141 | ib_ucm_ctx_put(ctx); |
1142 | } else | |
1143 | result = PTR_ERR(ctx); | |
a5b74540 | 1144 | |
a5b74540 | 1145 | done: |
79d81907 HR |
1146 | kfree(param.private_data); |
1147 | kfree(param.info); | |
a5b74540 HR |
1148 | return result; |
1149 | } | |
1150 | ||
1151 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1152 | const char __user *inbuf, | |
1153 | int in_len, int out_len) = { | |
1154 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1155 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1156 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1157 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1158 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1159 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1160 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1161 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1162 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1163 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1164 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1165 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1166 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1167 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1168 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1169 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1170 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1171 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1172 | }; |
1173 | ||
1174 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1175 | size_t len, loff_t *pos) | |
1176 | { | |
1177 | struct ib_ucm_file *file = filp->private_data; | |
1178 | struct ib_ucm_cmd_hdr hdr; | |
1179 | ssize_t result; | |
1180 | ||
1181 | if (len < sizeof(hdr)) | |
1182 | return -EINVAL; | |
1183 | ||
1184 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1185 | return -EFAULT; | |
1186 | ||
79d81907 HR |
1187 | ucm_dbg("Write. cmd <%d> in <%d> out <%d> len <%Zu>\n", |
1188 | hdr.cmd, hdr.in, hdr.out, len); | |
a5b74540 HR |
1189 | |
1190 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) | |
1191 | return -EINVAL; | |
1192 | ||
1193 | if (hdr.in + sizeof(hdr) > len) | |
1194 | return -EINVAL; | |
1195 | ||
1196 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1197 | hdr.in, hdr.out); | |
1198 | if (!result) | |
1199 | result = len; | |
1200 | ||
1201 | return result; | |
1202 | } | |
1203 | ||
1204 | static unsigned int ib_ucm_poll(struct file *filp, | |
1205 | struct poll_table_struct *wait) | |
1206 | { | |
1207 | struct ib_ucm_file *file = filp->private_data; | |
1208 | unsigned int mask = 0; | |
1209 | ||
1210 | poll_wait(filp, &file->poll_wait, wait); | |
1211 | ||
1212 | if (!list_empty(&file->events)) | |
1213 | mask = POLLIN | POLLRDNORM; | |
1214 | ||
1215 | return mask; | |
1216 | } | |
1217 | ||
1218 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1219 | { | |
1220 | struct ib_ucm_file *file; | |
1221 | ||
1222 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1223 | if (!file) | |
1224 | return -ENOMEM; | |
1225 | ||
1226 | INIT_LIST_HEAD(&file->events); | |
1227 | INIT_LIST_HEAD(&file->ctxs); | |
1228 | init_waitqueue_head(&file->poll_wait); | |
1229 | ||
1230 | init_MUTEX(&file->mutex); | |
1231 | ||
1232 | filp->private_data = file; | |
1233 | file->filp = filp; | |
1234 | ||
79d81907 | 1235 | ucm_dbg("Created struct\n"); |
a5b74540 HR |
1236 | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1241 | { | |
1242 | struct ib_ucm_file *file = filp->private_data; | |
1243 | struct ib_ucm_context *ctx; | |
1244 | ||
1245 | down(&file->mutex); | |
a5b74540 | 1246 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1247 | ctx = list_entry(file->ctxs.next, |
1248 | struct ib_ucm_context, file_list); | |
b9ef520f | 1249 | up(&file->mutex); |
0b2b35f6 SH |
1250 | |
1251 | down(&ctx_id_mutex); | |
1252 | idr_remove(&ctx_id_table, ctx->id); | |
1253 | up(&ctx_id_mutex); | |
1254 | ||
1255 | ib_destroy_cm_id(ctx->cm_id); | |
1256 | ib_ucm_cleanup_events(ctx); | |
1257 | kfree(ctx); | |
1258 | ||
a5b74540 HR |
1259 | down(&file->mutex); |
1260 | } | |
a5b74540 | 1261 | up(&file->mutex); |
a5b74540 | 1262 | kfree(file); |
a5b74540 HR |
1263 | return 0; |
1264 | } | |
1265 | ||
1266 | static struct file_operations ib_ucm_fops = { | |
1267 | .owner = THIS_MODULE, | |
1268 | .open = ib_ucm_open, | |
1269 | .release = ib_ucm_close, | |
1270 | .write = ib_ucm_write, | |
1271 | .poll = ib_ucm_poll, | |
1272 | }; | |
1273 | ||
1274 | ||
2d0d099f | 1275 | static struct class *ib_ucm_class; |
a5b74540 HR |
1276 | static struct cdev ib_ucm_cdev; |
1277 | ||
1278 | static int __init ib_ucm_init(void) | |
1279 | { | |
1280 | int result; | |
1281 | ||
1282 | result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm"); | |
1283 | if (result) { | |
79d81907 | 1284 | ucm_dbg("Error <%d> registering dev\n", result); |
a5b74540 HR |
1285 | goto err_chr; |
1286 | } | |
1287 | ||
1288 | cdev_init(&ib_ucm_cdev, &ib_ucm_fops); | |
1289 | ||
1290 | result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1); | |
1291 | if (result) { | |
79d81907 | 1292 | ucm_dbg("Error <%d> adding cdev\n", result); |
a5b74540 HR |
1293 | goto err_cdev; |
1294 | } | |
1295 | ||
2d0d099f | 1296 | ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm"); |
a5b74540 HR |
1297 | if (IS_ERR(ib_ucm_class)) { |
1298 | result = PTR_ERR(ib_ucm_class); | |
79d81907 | 1299 | ucm_dbg("Error <%d> creating class\n", result); |
a5b74540 HR |
1300 | goto err_class; |
1301 | } | |
1302 | ||
2d0d099f | 1303 | class_device_create(ib_ucm_class, IB_UCM_DEV, NULL, "ucm"); |
a5b74540 HR |
1304 | |
1305 | idr_init(&ctx_id_table); | |
1306 | init_MUTEX(&ctx_id_mutex); | |
1307 | ||
1308 | return 0; | |
1309 | err_class: | |
1310 | cdev_del(&ib_ucm_cdev); | |
1311 | err_cdev: | |
1312 | unregister_chrdev_region(IB_UCM_DEV, 1); | |
1313 | err_chr: | |
1314 | return result; | |
1315 | } | |
1316 | ||
1317 | static void __exit ib_ucm_cleanup(void) | |
1318 | { | |
2d0d099f TD |
1319 | class_device_destroy(ib_ucm_class, IB_UCM_DEV); |
1320 | class_destroy(ib_ucm_class); | |
a5b74540 HR |
1321 | cdev_del(&ib_ucm_cdev); |
1322 | unregister_chrdev_region(IB_UCM_DEV, 1); | |
1323 | } | |
1324 | ||
1325 | module_init(ib_ucm_init); | |
1326 | module_exit(ib_ucm_cleanup); |