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> | |
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 | ||
175 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); | |
176 | if (!ctx) | |
177 | return NULL; | |
178 | ||
0b2b35f6 | 179 | memset(ctx, 0, sizeof *ctx); |
b9ef520f SH |
180 | atomic_set(&ctx->ref, 1); |
181 | init_waitqueue_head(&ctx->wait); | |
a5b74540 | 182 | ctx->file = file; |
a5b74540 | 183 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 184 | |
0b2b35f6 SH |
185 | do { |
186 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
187 | if (!result) | |
188 | goto error; | |
a5b74540 | 189 | |
0b2b35f6 SH |
190 | down(&ctx_id_mutex); |
191 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); | |
192 | up(&ctx_id_mutex); | |
193 | } while (result == -EAGAIN); | |
a5b74540 | 194 | |
a5b74540 HR |
195 | if (result) |
196 | goto error; | |
197 | ||
0b2b35f6 | 198 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 199 | return ctx; |
0b2b35f6 | 200 | |
a5b74540 | 201 | error: |
a5b74540 | 202 | kfree(ctx); |
a5b74540 HR |
203 | return NULL; |
204 | } | |
07d357d0 | 205 | |
a5b74540 HR |
206 | static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath, |
207 | struct ib_sa_path_rec *kpath) | |
208 | { | |
209 | if (!kpath || !upath) | |
210 | return; | |
211 | ||
b9ef520f SH |
212 | memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid); |
213 | memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid); | |
a5b74540 HR |
214 | |
215 | upath->dlid = kpath->dlid; | |
216 | upath->slid = kpath->slid; | |
217 | upath->raw_traffic = kpath->raw_traffic; | |
218 | upath->flow_label = kpath->flow_label; | |
219 | upath->hop_limit = kpath->hop_limit; | |
220 | upath->traffic_class = kpath->traffic_class; | |
221 | upath->reversible = kpath->reversible; | |
222 | upath->numb_path = kpath->numb_path; | |
223 | upath->pkey = kpath->pkey; | |
224 | upath->sl = kpath->sl; | |
225 | upath->mtu_selector = kpath->mtu_selector; | |
226 | upath->mtu = kpath->mtu; | |
227 | upath->rate_selector = kpath->rate_selector; | |
228 | upath->rate = kpath->rate; | |
229 | upath->packet_life_time = kpath->packet_life_time; | |
230 | upath->preference = kpath->preference; | |
231 | ||
232 | upath->packet_life_time_selector = | |
233 | kpath->packet_life_time_selector; | |
234 | } | |
235 | ||
0b2b35f6 | 236 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
237 | struct ib_cm_req_event_param *kreq) |
238 | { | |
a5b74540 HR |
239 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
240 | ureq->remote_qkey = kreq->remote_qkey; | |
241 | ureq->remote_qpn = kreq->remote_qpn; | |
242 | ureq->qp_type = kreq->qp_type; | |
243 | ureq->starting_psn = kreq->starting_psn; | |
244 | ureq->responder_resources = kreq->responder_resources; | |
245 | ureq->initiator_depth = kreq->initiator_depth; | |
246 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
247 | ureq->flow_control = kreq->flow_control; | |
248 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
249 | ureq->retry_count = kreq->retry_count; | |
250 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
251 | ureq->srq = kreq->srq; | |
07d357d0 | 252 | ureq->port = kreq->port; |
a5b74540 HR |
253 | |
254 | ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path); | |
255 | ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path); | |
256 | } | |
257 | ||
258 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
259 | struct ib_cm_rep_event_param *krep) | |
260 | { | |
261 | urep->remote_ca_guid = krep->remote_ca_guid; | |
262 | urep->remote_qkey = krep->remote_qkey; | |
263 | urep->remote_qpn = krep->remote_qpn; | |
264 | urep->starting_psn = krep->starting_psn; | |
265 | urep->responder_resources = krep->responder_resources; | |
266 | urep->initiator_depth = krep->initiator_depth; | |
267 | urep->target_ack_delay = krep->target_ack_delay; | |
268 | urep->failover_accepted = krep->failover_accepted; | |
269 | urep->flow_control = krep->flow_control; | |
270 | urep->rnr_retry_count = krep->rnr_retry_count; | |
271 | urep->srq = krep->srq; | |
272 | } | |
273 | ||
a5b74540 HR |
274 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
275 | struct ib_cm_sidr_rep_event_param *krep) | |
276 | { | |
277 | urep->status = krep->status; | |
278 | urep->qkey = krep->qkey; | |
279 | urep->qpn = krep->qpn; | |
280 | }; | |
281 | ||
0b2b35f6 | 282 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
283 | struct ib_ucm_event *uvt) |
284 | { | |
285 | void *info = NULL; | |
a5b74540 HR |
286 | |
287 | switch (evt->event) { | |
288 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 289 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
290 | &evt->param.req_rcvd); |
291 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 292 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
293 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
294 | IB_UCM_PRES_ALTERNATE : 0); | |
295 | break; | |
296 | case IB_CM_REP_RECEIVED: | |
297 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
298 | &evt->param.rep_rcvd); | |
299 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
300 | break; |
301 | case IB_CM_RTU_RECEIVED: | |
302 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
303 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
304 | break; |
305 | case IB_CM_DREQ_RECEIVED: | |
306 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
307 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
308 | break; |
309 | case IB_CM_DREP_RECEIVED: | |
310 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
311 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
312 | break; |
313 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
314 | uvt->resp.u.mra_resp.timeout = |
315 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 316 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
317 | break; |
318 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 319 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
320 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
321 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
322 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
323 | break; |
324 | case IB_CM_LAP_RECEIVED: | |
b9ef520f SH |
325 | ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path, |
326 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 327 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 328 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
329 | break; |
330 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 331 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
332 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
333 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
334 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
335 | break; |
336 | case IB_CM_SIDR_REQ_RECEIVED: | |
0b2b35f6 SH |
337 | uvt->resp.u.sidr_req_resp.pkey = |
338 | evt->param.sidr_req_rcvd.pkey; | |
07d357d0 SH |
339 | uvt->resp.u.sidr_req_resp.port = |
340 | evt->param.sidr_req_rcvd.port; | |
a5b74540 | 341 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
342 | break; |
343 | case IB_CM_SIDR_REP_RECEIVED: | |
344 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
345 | &evt->param.sidr_rep_rcvd); | |
346 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
347 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
348 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
349 | break; |
350 | default: | |
351 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
352 | break; |
353 | } | |
354 | ||
b9ef520f | 355 | if (uvt->data_len) { |
a5b74540 | 356 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
357 | if (!uvt->data) |
358 | goto err1; | |
a5b74540 HR |
359 | |
360 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
361 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
362 | } | |
363 | ||
b9ef520f | 364 | if (uvt->info_len) { |
a5b74540 | 365 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
366 | if (!uvt->info) |
367 | goto err2; | |
a5b74540 HR |
368 | |
369 | memcpy(uvt->info, info, uvt->info_len); | |
370 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
371 | } | |
a5b74540 | 372 | return 0; |
b9ef520f SH |
373 | |
374 | err2: | |
79d81907 | 375 | kfree(uvt->data); |
b9ef520f SH |
376 | err1: |
377 | return -ENOMEM; | |
a5b74540 HR |
378 | } |
379 | ||
380 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
381 | struct ib_cm_event *event) | |
382 | { | |
383 | struct ib_ucm_event *uevent; | |
384 | struct ib_ucm_context *ctx; | |
385 | int result = 0; | |
a5b74540 | 386 | |
b9ef520f | 387 | ctx = cm_id->context; |
a5b74540 | 388 | |
a5b74540 | 389 | uevent = kmalloc(sizeof(*uevent), GFP_KERNEL); |
b9ef520f SH |
390 | if (!uevent) |
391 | goto err1; | |
a5b74540 HR |
392 | |
393 | memset(uevent, 0, sizeof(*uevent)); | |
0b2b35f6 SH |
394 | uevent->ctx = ctx; |
395 | uevent->cm_id = cm_id; | |
396 | uevent->resp.uid = ctx->uid; | |
397 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
398 | uevent->resp.event = event->event; |
399 | ||
0b2b35f6 | 400 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 401 | if (result) |
b9ef520f | 402 | goto err2; |
a5b74540 | 403 | |
a5b74540 | 404 | down(&ctx->file->mutex); |
a5b74540 HR |
405 | list_add_tail(&uevent->file_list, &ctx->file->events); |
406 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 407 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 408 | up(&ctx->file->mutex); |
b9ef520f SH |
409 | return 0; |
410 | ||
411 | err2: | |
412 | kfree(uevent); | |
413 | err1: | |
414 | /* Destroy new cm_id's */ | |
0b2b35f6 | 415 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
416 | } |
417 | ||
418 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
419 | const char __user *inbuf, | |
420 | int in_len, int out_len) | |
421 | { | |
422 | struct ib_ucm_context *ctx; | |
423 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 424 | struct ib_ucm_event *uevent; |
a5b74540 HR |
425 | int result = 0; |
426 | DEFINE_WAIT(wait); | |
427 | ||
428 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
429 | return -ENOSPC; | |
430 | ||
431 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
432 | return -EFAULT; | |
07d357d0 | 433 | |
a5b74540 | 434 | down(&file->mutex); |
a5b74540 HR |
435 | while (list_empty(&file->events)) { |
436 | ||
437 | if (file->filp->f_flags & O_NONBLOCK) { | |
438 | result = -EAGAIN; | |
439 | break; | |
440 | } | |
441 | ||
442 | if (signal_pending(current)) { | |
443 | result = -ERESTARTSYS; | |
444 | break; | |
445 | } | |
446 | ||
447 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
448 | ||
449 | up(&file->mutex); | |
450 | schedule(); | |
451 | down(&file->mutex); | |
452 | ||
453 | finish_wait(&file->poll_wait, &wait); | |
454 | } | |
455 | ||
456 | if (result) | |
457 | goto done; | |
458 | ||
459 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
460 | ||
0b2b35f6 SH |
461 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
462 | ctx = ib_ucm_ctx_alloc(file); | |
463 | if (!ctx) { | |
464 | result = -ENOMEM; | |
465 | goto done; | |
466 | } | |
a5b74540 | 467 | |
0b2b35f6 SH |
468 | ctx->cm_id = uevent->cm_id; |
469 | ctx->cm_id->context = ctx; | |
470 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
471 | } |
472 | ||
a5b74540 HR |
473 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
474 | &uevent->resp, sizeof(uevent->resp))) { | |
475 | result = -EFAULT; | |
476 | goto done; | |
477 | } | |
478 | ||
479 | if (uevent->data) { | |
a5b74540 HR |
480 | if (cmd.data_len < uevent->data_len) { |
481 | result = -ENOMEM; | |
482 | goto done; | |
483 | } | |
a5b74540 HR |
484 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
485 | uevent->data, uevent->data_len)) { | |
486 | result = -EFAULT; | |
487 | goto done; | |
488 | } | |
489 | } | |
490 | ||
491 | if (uevent->info) { | |
a5b74540 HR |
492 | if (cmd.info_len < uevent->info_len) { |
493 | result = -ENOMEM; | |
494 | goto done; | |
495 | } | |
a5b74540 HR |
496 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
497 | uevent->info, uevent->info_len)) { | |
498 | result = -EFAULT; | |
499 | goto done; | |
500 | } | |
501 | } | |
502 | ||
503 | list_del(&uevent->file_list); | |
504 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 505 | uevent->ctx->events_reported++; |
a5b74540 | 506 | |
79d81907 HR |
507 | kfree(uevent->data); |
508 | kfree(uevent->info); | |
a5b74540 HR |
509 | kfree(uevent); |
510 | done: | |
511 | up(&file->mutex); | |
512 | return result; | |
513 | } | |
514 | ||
a5b74540 HR |
515 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
516 | const char __user *inbuf, | |
517 | int in_len, int out_len) | |
518 | { | |
519 | struct ib_ucm_create_id cmd; | |
520 | struct ib_ucm_create_id_resp resp; | |
521 | struct ib_ucm_context *ctx; | |
522 | int result; | |
523 | ||
524 | if (out_len < sizeof(resp)) | |
525 | return -ENOSPC; | |
526 | ||
527 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
528 | return -EFAULT; | |
529 | ||
b9ef520f | 530 | down(&file->mutex); |
a5b74540 | 531 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 532 | up(&file->mutex); |
a5b74540 HR |
533 | if (!ctx) |
534 | return -ENOMEM; | |
535 | ||
0b2b35f6 | 536 | ctx->uid = cmd.uid; |
07d357d0 SH |
537 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
538 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
539 | if (IS_ERR(ctx->cm_id)) { |
540 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 541 | goto err1; |
a5b74540 HR |
542 | } |
543 | ||
544 | resp.id = ctx->id; | |
545 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
546 | &resp, sizeof(resp))) { | |
547 | result = -EFAULT; | |
07d357d0 | 548 | goto err2; |
a5b74540 | 549 | } |
a5b74540 | 550 | return 0; |
a5b74540 | 551 | |
07d357d0 SH |
552 | err2: |
553 | ib_destroy_cm_id(ctx->cm_id); | |
554 | err1: | |
0b2b35f6 SH |
555 | down(&ctx_id_mutex); |
556 | idr_remove(&ctx_id_table, ctx->id); | |
557 | up(&ctx_id_mutex); | |
0b2b35f6 | 558 | kfree(ctx); |
a5b74540 HR |
559 | return result; |
560 | } | |
561 | ||
562 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
563 | const char __user *inbuf, | |
564 | int in_len, int out_len) | |
565 | { | |
566 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
567 | struct ib_ucm_destroy_id_resp resp; |
568 | struct ib_ucm_context *ctx; | |
569 | int result = 0; | |
570 | ||
571 | if (out_len < sizeof(resp)) | |
572 | return -ENOSPC; | |
a5b74540 HR |
573 | |
574 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
575 | return -EFAULT; | |
576 | ||
0b2b35f6 SH |
577 | down(&ctx_id_mutex); |
578 | ctx = idr_find(&ctx_id_table, cmd.id); | |
579 | if (!ctx) | |
580 | ctx = ERR_PTR(-ENOENT); | |
581 | else if (ctx->file != file) | |
582 | ctx = ERR_PTR(-EINVAL); | |
583 | else | |
584 | idr_remove(&ctx_id_table, ctx->id); | |
585 | up(&ctx_id_mutex); | |
586 | ||
587 | if (IS_ERR(ctx)) | |
588 | return PTR_ERR(ctx); | |
589 | ||
590 | atomic_dec(&ctx->ref); | |
591 | wait_event(ctx->wait, !atomic_read(&ctx->ref)); | |
592 | ||
593 | /* No new events will be generated after destroying the cm_id. */ | |
594 | ib_destroy_cm_id(ctx->cm_id); | |
595 | /* Cleanup events not yet reported to the user. */ | |
596 | ib_ucm_cleanup_events(ctx); | |
597 | ||
598 | resp.events_reported = ctx->events_reported; | |
599 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
600 | &resp, sizeof(resp))) | |
601 | result = -EFAULT; | |
602 | ||
603 | kfree(ctx); | |
604 | return result; | |
a5b74540 HR |
605 | } |
606 | ||
607 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
608 | const char __user *inbuf, | |
609 | int in_len, int out_len) | |
610 | { | |
611 | struct ib_ucm_attr_id_resp resp; | |
612 | struct ib_ucm_attr_id cmd; | |
613 | struct ib_ucm_context *ctx; | |
614 | int result = 0; | |
615 | ||
616 | if (out_len < sizeof(resp)) | |
617 | return -ENOSPC; | |
618 | ||
619 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
620 | return -EFAULT; | |
621 | ||
b9ef520f SH |
622 | ctx = ib_ucm_ctx_get(file, cmd.id); |
623 | if (IS_ERR(ctx)) | |
624 | return PTR_ERR(ctx); | |
a5b74540 HR |
625 | |
626 | resp.service_id = ctx->cm_id->service_id; | |
627 | resp.service_mask = ctx->cm_id->service_mask; | |
628 | resp.local_id = ctx->cm_id->local_id; | |
629 | resp.remote_id = ctx->cm_id->remote_id; | |
630 | ||
631 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
632 | &resp, sizeof(resp))) | |
633 | result = -EFAULT; | |
634 | ||
b9ef520f | 635 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
636 | return result; |
637 | } | |
638 | ||
0b2b35f6 SH |
639 | static void ib_ucm_copy_ah_attr(struct ib_ucm_ah_attr *dest_attr, |
640 | struct ib_ah_attr *src_attr) | |
641 | { | |
642 | memcpy(dest_attr->grh_dgid, src_attr->grh.dgid.raw, | |
643 | sizeof src_attr->grh.dgid); | |
644 | dest_attr->grh_flow_label = src_attr->grh.flow_label; | |
645 | dest_attr->grh_sgid_index = src_attr->grh.sgid_index; | |
646 | dest_attr->grh_hop_limit = src_attr->grh.hop_limit; | |
647 | dest_attr->grh_traffic_class = src_attr->grh.traffic_class; | |
648 | ||
649 | dest_attr->dlid = src_attr->dlid; | |
650 | dest_attr->sl = src_attr->sl; | |
651 | dest_attr->src_path_bits = src_attr->src_path_bits; | |
652 | dest_attr->static_rate = src_attr->static_rate; | |
653 | dest_attr->is_global = (src_attr->ah_flags & IB_AH_GRH); | |
654 | dest_attr->port_num = src_attr->port_num; | |
655 | } | |
656 | ||
657 | static void ib_ucm_copy_qp_attr(struct ib_ucm_init_qp_attr_resp *dest_attr, | |
658 | struct ib_qp_attr *src_attr) | |
659 | { | |
660 | dest_attr->cur_qp_state = src_attr->cur_qp_state; | |
661 | dest_attr->path_mtu = src_attr->path_mtu; | |
662 | dest_attr->path_mig_state = src_attr->path_mig_state; | |
663 | dest_attr->qkey = src_attr->qkey; | |
664 | dest_attr->rq_psn = src_attr->rq_psn; | |
665 | dest_attr->sq_psn = src_attr->sq_psn; | |
666 | dest_attr->dest_qp_num = src_attr->dest_qp_num; | |
667 | dest_attr->qp_access_flags = src_attr->qp_access_flags; | |
668 | ||
669 | dest_attr->max_send_wr = src_attr->cap.max_send_wr; | |
670 | dest_attr->max_recv_wr = src_attr->cap.max_recv_wr; | |
671 | dest_attr->max_send_sge = src_attr->cap.max_send_sge; | |
672 | dest_attr->max_recv_sge = src_attr->cap.max_recv_sge; | |
673 | dest_attr->max_inline_data = src_attr->cap.max_inline_data; | |
674 | ||
675 | ib_ucm_copy_ah_attr(&dest_attr->ah_attr, &src_attr->ah_attr); | |
676 | ib_ucm_copy_ah_attr(&dest_attr->alt_ah_attr, &src_attr->alt_ah_attr); | |
677 | ||
678 | dest_attr->pkey_index = src_attr->pkey_index; | |
679 | dest_attr->alt_pkey_index = src_attr->alt_pkey_index; | |
680 | dest_attr->en_sqd_async_notify = src_attr->en_sqd_async_notify; | |
681 | dest_attr->sq_draining = src_attr->sq_draining; | |
682 | dest_attr->max_rd_atomic = src_attr->max_rd_atomic; | |
683 | dest_attr->max_dest_rd_atomic = src_attr->max_dest_rd_atomic; | |
684 | dest_attr->min_rnr_timer = src_attr->min_rnr_timer; | |
685 | dest_attr->port_num = src_attr->port_num; | |
686 | dest_attr->timeout = src_attr->timeout; | |
687 | dest_attr->retry_cnt = src_attr->retry_cnt; | |
688 | dest_attr->rnr_retry = src_attr->rnr_retry; | |
689 | dest_attr->alt_port_num = src_attr->alt_port_num; | |
690 | dest_attr->alt_timeout = src_attr->alt_timeout; | |
691 | } | |
692 | ||
693 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, | |
694 | const char __user *inbuf, | |
695 | int in_len, int out_len) | |
696 | { | |
697 | struct ib_ucm_init_qp_attr_resp resp; | |
698 | struct ib_ucm_init_qp_attr cmd; | |
699 | struct ib_ucm_context *ctx; | |
700 | struct ib_qp_attr qp_attr; | |
701 | int result = 0; | |
702 | ||
703 | if (out_len < sizeof(resp)) | |
704 | return -ENOSPC; | |
705 | ||
706 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
707 | return -EFAULT; | |
708 | ||
709 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
710 | if (IS_ERR(ctx)) | |
711 | return PTR_ERR(ctx); | |
712 | ||
713 | resp.qp_attr_mask = 0; | |
714 | memset(&qp_attr, 0, sizeof qp_attr); | |
715 | qp_attr.qp_state = cmd.qp_state; | |
716 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
717 | if (result) | |
718 | goto out; | |
719 | ||
720 | ib_ucm_copy_qp_attr(&resp, &qp_attr); | |
721 | ||
722 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
723 | &resp, sizeof(resp))) | |
724 | result = -EFAULT; | |
725 | ||
726 | out: | |
727 | ib_ucm_ctx_put(ctx); | |
728 | return result; | |
729 | } | |
730 | ||
a5b74540 HR |
731 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
732 | const char __user *inbuf, | |
733 | int in_len, int out_len) | |
734 | { | |
735 | struct ib_ucm_listen cmd; | |
736 | struct ib_ucm_context *ctx; | |
737 | int result; | |
738 | ||
739 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
740 | return -EFAULT; | |
741 | ||
b9ef520f SH |
742 | ctx = ib_ucm_ctx_get(file, cmd.id); |
743 | if (IS_ERR(ctx)) | |
744 | return PTR_ERR(ctx); | |
a5b74540 | 745 | |
b9ef520f SH |
746 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
747 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
748 | return result; |
749 | } | |
750 | ||
751 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
752 | const char __user *inbuf, | |
753 | int in_len, int out_len) | |
754 | { | |
755 | struct ib_ucm_establish cmd; | |
756 | struct ib_ucm_context *ctx; | |
757 | int result; | |
758 | ||
759 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
760 | return -EFAULT; | |
761 | ||
b9ef520f SH |
762 | ctx = ib_ucm_ctx_get(file, cmd.id); |
763 | if (IS_ERR(ctx)) | |
764 | return PTR_ERR(ctx); | |
a5b74540 | 765 | |
b9ef520f SH |
766 | result = ib_cm_establish(ctx->cm_id); |
767 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
768 | return result; |
769 | } | |
770 | ||
771 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
772 | { | |
773 | void *data; | |
774 | ||
775 | *dest = NULL; | |
776 | ||
777 | if (!len) | |
778 | return 0; | |
779 | ||
780 | data = kmalloc(len, GFP_KERNEL); | |
781 | if (!data) | |
782 | return -ENOMEM; | |
783 | ||
784 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
785 | kfree(data); | |
786 | return -EFAULT; | |
787 | } | |
788 | ||
789 | *dest = data; | |
790 | return 0; | |
791 | } | |
792 | ||
793 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
794 | { | |
795 | struct ib_ucm_path_rec ucm_path; | |
796 | struct ib_sa_path_rec *sa_path; | |
797 | ||
798 | *path = NULL; | |
799 | ||
800 | if (!src) | |
801 | return 0; | |
802 | ||
803 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
804 | if (!sa_path) | |
805 | return -ENOMEM; | |
806 | ||
807 | if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src, | |
808 | sizeof(ucm_path))) { | |
809 | ||
810 | kfree(sa_path); | |
811 | return -EFAULT; | |
812 | } | |
813 | ||
b9ef520f SH |
814 | memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid); |
815 | memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid); | |
a5b74540 HR |
816 | |
817 | sa_path->dlid = ucm_path.dlid; | |
818 | sa_path->slid = ucm_path.slid; | |
819 | sa_path->raw_traffic = ucm_path.raw_traffic; | |
820 | sa_path->flow_label = ucm_path.flow_label; | |
821 | sa_path->hop_limit = ucm_path.hop_limit; | |
822 | sa_path->traffic_class = ucm_path.traffic_class; | |
823 | sa_path->reversible = ucm_path.reversible; | |
824 | sa_path->numb_path = ucm_path.numb_path; | |
825 | sa_path->pkey = ucm_path.pkey; | |
826 | sa_path->sl = ucm_path.sl; | |
827 | sa_path->mtu_selector = ucm_path.mtu_selector; | |
828 | sa_path->mtu = ucm_path.mtu; | |
829 | sa_path->rate_selector = ucm_path.rate_selector; | |
830 | sa_path->rate = ucm_path.rate; | |
831 | sa_path->packet_life_time = ucm_path.packet_life_time; | |
832 | sa_path->preference = ucm_path.preference; | |
833 | ||
834 | sa_path->packet_life_time_selector = | |
835 | ucm_path.packet_life_time_selector; | |
836 | ||
837 | *path = sa_path; | |
838 | return 0; | |
839 | } | |
840 | ||
841 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
842 | const char __user *inbuf, | |
843 | int in_len, int out_len) | |
844 | { | |
845 | struct ib_cm_req_param param; | |
846 | struct ib_ucm_context *ctx; | |
847 | struct ib_ucm_req cmd; | |
848 | int result; | |
849 | ||
850 | param.private_data = NULL; | |
851 | param.primary_path = NULL; | |
852 | param.alternate_path = NULL; | |
853 | ||
854 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
855 | return -EFAULT; | |
856 | ||
857 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
858 | if (result) | |
859 | goto done; | |
860 | ||
861 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
862 | if (result) | |
863 | goto done; | |
864 | ||
865 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
866 | if (result) | |
867 | goto done; | |
868 | ||
869 | param.private_data_len = cmd.len; | |
870 | param.service_id = cmd.sid; | |
871 | param.qp_num = cmd.qpn; | |
872 | param.qp_type = cmd.qp_type; | |
873 | param.starting_psn = cmd.psn; | |
874 | param.peer_to_peer = cmd.peer_to_peer; | |
875 | param.responder_resources = cmd.responder_resources; | |
876 | param.initiator_depth = cmd.initiator_depth; | |
877 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
878 | param.flow_control = cmd.flow_control; | |
879 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
880 | param.retry_count = cmd.retry_count; | |
881 | param.rnr_retry_count = cmd.rnr_retry_count; | |
882 | param.max_cm_retries = cmd.max_cm_retries; | |
883 | param.srq = cmd.srq; | |
884 | ||
b9ef520f SH |
885 | ctx = ib_ucm_ctx_get(file, cmd.id); |
886 | if (!IS_ERR(ctx)) { | |
a5b74540 | 887 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
888 | ib_ucm_ctx_put(ctx); |
889 | } else | |
890 | result = PTR_ERR(ctx); | |
a5b74540 | 891 | |
a5b74540 | 892 | done: |
79d81907 HR |
893 | kfree(param.private_data); |
894 | kfree(param.primary_path); | |
895 | kfree(param.alternate_path); | |
a5b74540 HR |
896 | return result; |
897 | } | |
898 | ||
899 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
900 | const char __user *inbuf, | |
901 | int in_len, int out_len) | |
902 | { | |
903 | struct ib_cm_rep_param param; | |
904 | struct ib_ucm_context *ctx; | |
905 | struct ib_ucm_rep cmd; | |
906 | int result; | |
907 | ||
908 | param.private_data = NULL; | |
909 | ||
910 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
911 | return -EFAULT; | |
912 | ||
913 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
914 | if (result) | |
915 | return result; | |
916 | ||
917 | param.qp_num = cmd.qpn; | |
918 | param.starting_psn = cmd.psn; | |
919 | param.private_data_len = cmd.len; | |
920 | param.responder_resources = cmd.responder_resources; | |
921 | param.initiator_depth = cmd.initiator_depth; | |
922 | param.target_ack_delay = cmd.target_ack_delay; | |
923 | param.failover_accepted = cmd.failover_accepted; | |
924 | param.flow_control = cmd.flow_control; | |
925 | param.rnr_retry_count = cmd.rnr_retry_count; | |
926 | param.srq = cmd.srq; | |
927 | ||
b9ef520f SH |
928 | ctx = ib_ucm_ctx_get(file, cmd.id); |
929 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 930 | ctx->uid = cmd.uid; |
a5b74540 | 931 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
932 | ib_ucm_ctx_put(ctx); |
933 | } else | |
934 | result = PTR_ERR(ctx); | |
a5b74540 | 935 | |
79d81907 | 936 | kfree(param.private_data); |
a5b74540 HR |
937 | return result; |
938 | } | |
939 | ||
940 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
941 | const char __user *inbuf, int in_len, | |
942 | int (*func)(struct ib_cm_id *cm_id, | |
943 | const void *private_data, | |
944 | u8 private_data_len)) | |
945 | { | |
946 | struct ib_ucm_private_data cmd; | |
947 | struct ib_ucm_context *ctx; | |
948 | const void *private_data = NULL; | |
949 | int result; | |
950 | ||
951 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
952 | return -EFAULT; | |
953 | ||
954 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
955 | if (result) | |
956 | return result; | |
957 | ||
b9ef520f SH |
958 | ctx = ib_ucm_ctx_get(file, cmd.id); |
959 | if (!IS_ERR(ctx)) { | |
a5b74540 | 960 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
961 | ib_ucm_ctx_put(ctx); |
962 | } else | |
963 | result = PTR_ERR(ctx); | |
a5b74540 | 964 | |
79d81907 | 965 | kfree(private_data); |
a5b74540 HR |
966 | return result; |
967 | } | |
968 | ||
969 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
970 | const char __user *inbuf, | |
971 | int in_len, int out_len) | |
972 | { | |
973 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
974 | } | |
975 | ||
976 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
977 | const char __user *inbuf, | |
978 | int in_len, int out_len) | |
979 | { | |
980 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
981 | } | |
982 | ||
983 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
984 | const char __user *inbuf, | |
985 | int in_len, int out_len) | |
986 | { | |
987 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
988 | } | |
989 | ||
990 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
991 | const char __user *inbuf, int in_len, | |
992 | int (*func)(struct ib_cm_id *cm_id, | |
993 | int status, | |
994 | const void *info, | |
995 | u8 info_len, | |
996 | const void *data, | |
997 | u8 data_len)) | |
998 | { | |
999 | struct ib_ucm_context *ctx; | |
1000 | struct ib_ucm_info cmd; | |
1001 | const void *data = NULL; | |
1002 | const void *info = NULL; | |
1003 | int result; | |
1004 | ||
1005 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1006 | return -EFAULT; | |
1007 | ||
1008 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
1009 | if (result) | |
1010 | goto done; | |
1011 | ||
1012 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
1013 | if (result) | |
1014 | goto done; | |
1015 | ||
b9ef520f SH |
1016 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1017 | if (!IS_ERR(ctx)) { | |
1018 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 1019 | data, cmd.data_len); |
b9ef520f SH |
1020 | ib_ucm_ctx_put(ctx); |
1021 | } else | |
1022 | result = PTR_ERR(ctx); | |
a5b74540 | 1023 | |
a5b74540 | 1024 | done: |
79d81907 HR |
1025 | kfree(data); |
1026 | kfree(info); | |
a5b74540 HR |
1027 | return result; |
1028 | } | |
1029 | ||
1030 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
1031 | const char __user *inbuf, | |
1032 | int in_len, int out_len) | |
1033 | { | |
1034 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
1035 | } | |
1036 | ||
1037 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
1038 | const char __user *inbuf, | |
1039 | int in_len, int out_len) | |
1040 | { | |
1041 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
1042 | } | |
1043 | ||
1044 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
1045 | const char __user *inbuf, | |
1046 | int in_len, int out_len) | |
1047 | { | |
1048 | struct ib_ucm_context *ctx; | |
1049 | struct ib_ucm_mra cmd; | |
1050 | const void *data = NULL; | |
1051 | int result; | |
1052 | ||
1053 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1054 | return -EFAULT; | |
1055 | ||
1056 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1057 | if (result) | |
1058 | return result; | |
1059 | ||
b9ef520f SH |
1060 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1061 | if (!IS_ERR(ctx)) { | |
1062 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
1063 | ib_ucm_ctx_put(ctx); | |
1064 | } else | |
1065 | result = PTR_ERR(ctx); | |
a5b74540 | 1066 | |
79d81907 | 1067 | kfree(data); |
a5b74540 HR |
1068 | return result; |
1069 | } | |
1070 | ||
1071 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
1072 | const char __user *inbuf, | |
1073 | int in_len, int out_len) | |
1074 | { | |
1075 | struct ib_ucm_context *ctx; | |
1076 | struct ib_sa_path_rec *path = NULL; | |
1077 | struct ib_ucm_lap cmd; | |
1078 | const void *data = NULL; | |
1079 | int result; | |
1080 | ||
1081 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1082 | return -EFAULT; | |
1083 | ||
1084 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1085 | if (result) | |
1086 | goto done; | |
1087 | ||
1088 | result = ib_ucm_path_get(&path, cmd.path); | |
1089 | if (result) | |
1090 | goto done; | |
1091 | ||
b9ef520f SH |
1092 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1093 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1094 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
1095 | ib_ucm_ctx_put(ctx); |
1096 | } else | |
1097 | result = PTR_ERR(ctx); | |
a5b74540 | 1098 | |
a5b74540 | 1099 | done: |
79d81907 HR |
1100 | kfree(data); |
1101 | kfree(path); | |
a5b74540 HR |
1102 | return result; |
1103 | } | |
1104 | ||
1105 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1106 | const char __user *inbuf, | |
1107 | int in_len, int out_len) | |
1108 | { | |
1109 | struct ib_cm_sidr_req_param param; | |
1110 | struct ib_ucm_context *ctx; | |
1111 | struct ib_ucm_sidr_req cmd; | |
1112 | int result; | |
1113 | ||
1114 | param.private_data = NULL; | |
1115 | param.path = NULL; | |
1116 | ||
1117 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1118 | return -EFAULT; | |
1119 | ||
1120 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1121 | if (result) | |
1122 | goto done; | |
1123 | ||
1124 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1125 | if (result) | |
1126 | goto done; | |
1127 | ||
1128 | param.private_data_len = cmd.len; | |
1129 | param.service_id = cmd.sid; | |
1130 | param.timeout_ms = cmd.timeout; | |
1131 | param.max_cm_retries = cmd.max_cm_retries; | |
1132 | param.pkey = cmd.pkey; | |
1133 | ||
b9ef520f SH |
1134 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1135 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1136 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1137 | ib_ucm_ctx_put(ctx); |
1138 | } else | |
1139 | result = PTR_ERR(ctx); | |
a5b74540 | 1140 | |
a5b74540 | 1141 | done: |
79d81907 HR |
1142 | kfree(param.private_data); |
1143 | kfree(param.path); | |
a5b74540 HR |
1144 | return result; |
1145 | } | |
1146 | ||
1147 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1148 | const char __user *inbuf, | |
1149 | int in_len, int out_len) | |
1150 | { | |
1151 | struct ib_cm_sidr_rep_param param; | |
1152 | struct ib_ucm_sidr_rep cmd; | |
1153 | struct ib_ucm_context *ctx; | |
1154 | int result; | |
1155 | ||
1156 | param.info = NULL; | |
1157 | ||
1158 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1159 | return -EFAULT; | |
1160 | ||
1161 | result = ib_ucm_alloc_data(¶m.private_data, | |
1162 | cmd.data, cmd.data_len); | |
1163 | if (result) | |
1164 | goto done; | |
1165 | ||
1166 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1167 | if (result) | |
1168 | goto done; | |
1169 | ||
b9ef520f SH |
1170 | param.qp_num = cmd.qpn; |
1171 | param.qkey = cmd.qkey; | |
1172 | param.status = cmd.status; | |
1173 | param.info_length = cmd.info_len; | |
1174 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1175 | |
b9ef520f SH |
1176 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1177 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1178 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1179 | ib_ucm_ctx_put(ctx); |
1180 | } else | |
1181 | result = PTR_ERR(ctx); | |
a5b74540 | 1182 | |
a5b74540 | 1183 | done: |
79d81907 HR |
1184 | kfree(param.private_data); |
1185 | kfree(param.info); | |
a5b74540 HR |
1186 | return result; |
1187 | } | |
1188 | ||
1189 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1190 | const char __user *inbuf, | |
1191 | int in_len, int out_len) = { | |
1192 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1193 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1194 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1195 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1196 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1197 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1198 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1199 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1200 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1201 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1202 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1203 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1204 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1205 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1206 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1207 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1208 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1209 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1210 | }; |
1211 | ||
1212 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1213 | size_t len, loff_t *pos) | |
1214 | { | |
1215 | struct ib_ucm_file *file = filp->private_data; | |
1216 | struct ib_ucm_cmd_hdr hdr; | |
1217 | ssize_t result; | |
1218 | ||
1219 | if (len < sizeof(hdr)) | |
1220 | return -EINVAL; | |
1221 | ||
1222 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1223 | return -EFAULT; | |
1224 | ||
a5b74540 HR |
1225 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
1226 | return -EINVAL; | |
1227 | ||
1228 | if (hdr.in + sizeof(hdr) > len) | |
1229 | return -EINVAL; | |
1230 | ||
1231 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1232 | hdr.in, hdr.out); | |
1233 | if (!result) | |
1234 | result = len; | |
1235 | ||
1236 | return result; | |
1237 | } | |
1238 | ||
1239 | static unsigned int ib_ucm_poll(struct file *filp, | |
1240 | struct poll_table_struct *wait) | |
1241 | { | |
1242 | struct ib_ucm_file *file = filp->private_data; | |
1243 | unsigned int mask = 0; | |
1244 | ||
1245 | poll_wait(filp, &file->poll_wait, wait); | |
1246 | ||
1247 | if (!list_empty(&file->events)) | |
1248 | mask = POLLIN | POLLRDNORM; | |
1249 | ||
1250 | return mask; | |
1251 | } | |
1252 | ||
1253 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1254 | { | |
1255 | struct ib_ucm_file *file; | |
1256 | ||
1257 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1258 | if (!file) | |
1259 | return -ENOMEM; | |
1260 | ||
1261 | INIT_LIST_HEAD(&file->events); | |
1262 | INIT_LIST_HEAD(&file->ctxs); | |
1263 | init_waitqueue_head(&file->poll_wait); | |
1264 | ||
1265 | init_MUTEX(&file->mutex); | |
1266 | ||
1267 | filp->private_data = file; | |
1268 | file->filp = filp; | |
07d357d0 | 1269 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev); |
a5b74540 | 1270 | |
a5b74540 HR |
1271 | return 0; |
1272 | } | |
1273 | ||
1274 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1275 | { | |
1276 | struct ib_ucm_file *file = filp->private_data; | |
1277 | struct ib_ucm_context *ctx; | |
1278 | ||
1279 | down(&file->mutex); | |
a5b74540 | 1280 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1281 | ctx = list_entry(file->ctxs.next, |
1282 | struct ib_ucm_context, file_list); | |
b9ef520f | 1283 | up(&file->mutex); |
0b2b35f6 SH |
1284 | |
1285 | down(&ctx_id_mutex); | |
1286 | idr_remove(&ctx_id_table, ctx->id); | |
1287 | up(&ctx_id_mutex); | |
1288 | ||
1289 | ib_destroy_cm_id(ctx->cm_id); | |
1290 | ib_ucm_cleanup_events(ctx); | |
1291 | kfree(ctx); | |
1292 | ||
a5b74540 HR |
1293 | down(&file->mutex); |
1294 | } | |
a5b74540 | 1295 | up(&file->mutex); |
a5b74540 | 1296 | kfree(file); |
a5b74540 HR |
1297 | return 0; |
1298 | } | |
1299 | ||
07d357d0 SH |
1300 | static void ib_ucm_release_class_dev(struct class_device *class_dev) |
1301 | { | |
1302 | struct ib_ucm_device *dev; | |
1303 | ||
1304 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1305 | cdev_del(&dev->dev); | |
1306 | clear_bit(dev->devnum, dev_map); | |
1307 | kfree(dev); | |
1308 | } | |
1309 | ||
1310 | static struct file_operations ucm_fops = { | |
a5b74540 HR |
1311 | .owner = THIS_MODULE, |
1312 | .open = ib_ucm_open, | |
1313 | .release = ib_ucm_close, | |
1314 | .write = ib_ucm_write, | |
1315 | .poll = ib_ucm_poll, | |
1316 | }; | |
1317 | ||
07d357d0 SH |
1318 | static struct class ucm_class = { |
1319 | .name = "infiniband_cm", | |
1320 | .release = ib_ucm_release_class_dev | |
1321 | }; | |
1322 | ||
1323 | static ssize_t show_dev(struct class_device *class_dev, char *buf) | |
1324 | { | |
1325 | struct ib_ucm_device *dev; | |
1326 | ||
1327 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1328 | return print_dev_t(buf, dev->dev.dev); | |
1329 | } | |
1330 | static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL); | |
a5b74540 | 1331 | |
07d357d0 SH |
1332 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) |
1333 | { | |
1334 | struct ib_ucm_device *dev; | |
1335 | ||
1336 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1337 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
1338 | } | |
1339 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
a5b74540 | 1340 | |
07d357d0 | 1341 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1342 | { |
07d357d0 | 1343 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1344 | |
07d357d0 SH |
1345 | if (!device->alloc_ucontext) |
1346 | return; | |
1347 | ||
1348 | ucm_dev = kmalloc(sizeof *ucm_dev, GFP_KERNEL); | |
1349 | if (!ucm_dev) | |
1350 | return; | |
a5b74540 | 1351 | |
07d357d0 SH |
1352 | memset(ucm_dev, 0, sizeof *ucm_dev); |
1353 | ucm_dev->ib_dev = device; | |
a5b74540 | 1354 | |
07d357d0 SH |
1355 | ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
1356 | if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES) | |
1357 | goto err; | |
1358 | ||
1359 | set_bit(ucm_dev->devnum, dev_map); | |
1360 | ||
1361 | cdev_init(&ucm_dev->dev, &ucm_fops); | |
1362 | ucm_dev->dev.owner = THIS_MODULE; | |
1363 | kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum); | |
1364 | if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1)) | |
1365 | goto err; | |
1366 | ||
1367 | ucm_dev->class_dev.class = &ucm_class; | |
1368 | ucm_dev->class_dev.dev = device->dma_device; | |
1369 | snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d", | |
1370 | ucm_dev->devnum); | |
1371 | if (class_device_register(&ucm_dev->class_dev)) | |
a5b74540 | 1372 | goto err_cdev; |
a5b74540 | 1373 | |
07d357d0 SH |
1374 | if (class_device_create_file(&ucm_dev->class_dev, |
1375 | &class_device_attr_dev)) | |
1376 | goto err_class; | |
1377 | if (class_device_create_file(&ucm_dev->class_dev, | |
1378 | &class_device_attr_ibdev)) | |
a5b74540 | 1379 | goto err_class; |
07d357d0 SH |
1380 | |
1381 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1382 | return; | |
1383 | ||
1384 | err_class: | |
1385 | class_device_unregister(&ucm_dev->class_dev); | |
1386 | err_cdev: | |
1387 | cdev_del(&ucm_dev->dev); | |
1388 | clear_bit(ucm_dev->devnum, dev_map); | |
1389 | err: | |
1390 | kfree(ucm_dev); | |
1391 | return; | |
1392 | } | |
1393 | ||
1394 | static void ib_ucm_remove_one(struct ib_device *device) | |
1395 | { | |
1396 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1397 | ||
1398 | if (!ucm_dev) | |
1399 | return; | |
1400 | ||
1401 | class_device_unregister(&ucm_dev->class_dev); | |
1402 | } | |
1403 | ||
1404 | static ssize_t show_abi_version(struct class *class, char *buf) | |
1405 | { | |
1406 | return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION); | |
1407 | } | |
1408 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1409 | ||
1410 | static int __init ib_ucm_init(void) | |
1411 | { | |
1412 | int ret; | |
1413 | ||
1414 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1415 | "infiniband_cm"); | |
1416 | if (ret) { | |
1417 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
1418 | goto err; | |
a5b74540 HR |
1419 | } |
1420 | ||
07d357d0 SH |
1421 | ret = class_register(&ucm_class); |
1422 | if (ret) { | |
1423 | printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n"); | |
1424 | goto err_chrdev; | |
1425 | } | |
a5b74540 | 1426 | |
07d357d0 SH |
1427 | ret = class_create_file(&ucm_class, &class_attr_abi_version); |
1428 | if (ret) { | |
1429 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
1430 | goto err_class; | |
1431 | } | |
a5b74540 | 1432 | |
07d357d0 SH |
1433 | ret = ib_register_client(&ucm_client); |
1434 | if (ret) { | |
1435 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
1436 | goto err_class; | |
1437 | } | |
a5b74540 | 1438 | return 0; |
07d357d0 | 1439 | |
a5b74540 | 1440 | err_class: |
07d357d0 SH |
1441 | class_unregister(&ucm_class); |
1442 | err_chrdev: | |
1443 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
1444 | err: | |
1445 | return ret; | |
a5b74540 HR |
1446 | } |
1447 | ||
1448 | static void __exit ib_ucm_cleanup(void) | |
1449 | { | |
07d357d0 SH |
1450 | ib_unregister_client(&ucm_client); |
1451 | class_unregister(&ucm_class); | |
1452 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1453 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1454 | } |
1455 | ||
1456 | module_init(ib_ucm_init); | |
1457 | module_exit(ib_ucm_cleanup); |