Commit | Line | Data |
---|---|---|
a5b74540 HR |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
b9ef520f | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
a5b74540 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
a5b74540 | 32 | */ |
1b52fa98 SH |
33 | |
34 | #include <linux/completion.h> | |
a5b74540 HR |
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> | |
a99bbaf5 | 41 | #include <linux/sched.h> |
a5b74540 HR |
42 | #include <linux/file.h> |
43 | #include <linux/mount.h> | |
44 | #include <linux/cdev.h> | |
595e726a | 45 | #include <linux/idr.h> |
95ed644f | 46 | #include <linux/mutex.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
a5b74540 HR |
48 | |
49 | #include <asm/uaccess.h> | |
50 | ||
595e726a SH |
51 | #include <rdma/ib_cm.h> |
52 | #include <rdma/ib_user_cm.h> | |
6a9af2e1 | 53 | #include <rdma/ib_marshall.h> |
a5b74540 HR |
54 | |
55 | MODULE_AUTHOR("Libor Michalek"); | |
56 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
57 | MODULE_LICENSE("Dual BSD/GPL"); | |
58 | ||
07d357d0 SH |
59 | struct ib_ucm_device { |
60 | int devnum; | |
f4e91eb4 TJ |
61 | struct cdev cdev; |
62 | struct device dev; | |
07d357d0 SH |
63 | struct ib_device *ib_dev; |
64 | }; | |
65 | ||
595e726a | 66 | struct ib_ucm_file { |
4be10c1e | 67 | struct mutex file_mutex; |
595e726a | 68 | struct file *filp; |
07d357d0 | 69 | struct ib_ucm_device *device; |
79d81907 | 70 | |
07d357d0 SH |
71 | struct list_head ctxs; |
72 | struct list_head events; | |
595e726a SH |
73 | wait_queue_head_t poll_wait; |
74 | }; | |
75 | ||
76 | struct ib_ucm_context { | |
77 | int id; | |
1b52fa98 | 78 | struct completion comp; |
595e726a SH |
79 | atomic_t ref; |
80 | int events_reported; | |
81 | ||
82 | struct ib_ucm_file *file; | |
83 | struct ib_cm_id *cm_id; | |
84 | __u64 uid; | |
85 | ||
86 | struct list_head events; /* list of pending events. */ | |
87 | struct list_head file_list; /* member in file ctx list */ | |
88 | }; | |
89 | ||
90 | struct ib_ucm_event { | |
91 | struct ib_ucm_context *ctx; | |
92 | struct list_head file_list; /* member in file event list */ | |
93 | struct list_head ctx_list; /* member in ctx event list */ | |
94 | ||
95 | struct ib_cm_id *cm_id; | |
96 | struct ib_ucm_event_resp resp; | |
97 | void *data; | |
98 | void *info; | |
99 | int data_len; | |
100 | int info_len; | |
101 | }; | |
79d81907 | 102 | |
a5b74540 HR |
103 | enum { |
104 | IB_UCM_MAJOR = 231, | |
07d357d0 SH |
105 | IB_UCM_BASE_MINOR = 224, |
106 | IB_UCM_MAX_DEVICES = 32 | |
a5b74540 HR |
107 | }; |
108 | ||
07d357d0 | 109 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 110 | |
07d357d0 | 111 | static void ib_ucm_add_one(struct ib_device *device); |
7c1eb45a | 112 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data); |
a5b74540 | 113 | |
07d357d0 SH |
114 | static struct ib_client ucm_client = { |
115 | .name = "ucm", | |
116 | .add = ib_ucm_add_one, | |
117 | .remove = ib_ucm_remove_one | |
118 | }; | |
119 | ||
95ed644f | 120 | static DEFINE_MUTEX(ctx_id_mutex); |
762a03e2 | 121 | static DEFINE_IDR(ctx_id_table); |
07d357d0 | 122 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 123 | |
b9ef520f | 124 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
125 | { |
126 | struct ib_ucm_context *ctx; | |
127 | ||
95ed644f | 128 | mutex_lock(&ctx_id_mutex); |
a5b74540 | 129 | ctx = idr_find(&ctx_id_table, id); |
b9ef520f SH |
130 | if (!ctx) |
131 | ctx = ERR_PTR(-ENOENT); | |
132 | else if (ctx->file != file) | |
133 | ctx = ERR_PTR(-EINVAL); | |
134 | else | |
135 | atomic_inc(&ctx->ref); | |
95ed644f | 136 | mutex_unlock(&ctx_id_mutex); |
a5b74540 HR |
137 | |
138 | return ctx; | |
139 | } | |
140 | ||
141 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
142 | { | |
b9ef520f | 143 | if (atomic_dec_and_test(&ctx->ref)) |
1b52fa98 | 144 | complete(&ctx->comp); |
b9ef520f SH |
145 | } |
146 | ||
0b2b35f6 | 147 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 148 | { |
0b2b35f6 SH |
149 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
150 | } | |
b9ef520f | 151 | |
0b2b35f6 SH |
152 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
153 | { | |
154 | struct ib_ucm_event *uevent; | |
a5b74540 | 155 | |
4be10c1e | 156 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
157 | list_del(&ctx->file_list); |
158 | while (!list_empty(&ctx->events)) { | |
159 | ||
160 | uevent = list_entry(ctx->events.next, | |
161 | struct ib_ucm_event, ctx_list); | |
162 | list_del(&uevent->file_list); | |
163 | list_del(&uevent->ctx_list); | |
f469b262 | 164 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
165 | |
166 | /* clear incoming connections. */ | |
0b2b35f6 | 167 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
168 | ib_destroy_cm_id(uevent->cm_id); |
169 | ||
170 | kfree(uevent); | |
f469b262 | 171 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 | 172 | } |
4be10c1e | 173 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
174 | } |
175 | ||
176 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
177 | { | |
178 | struct ib_ucm_context *ctx; | |
a5b74540 | 179 | |
de6eb66b | 180 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
181 | if (!ctx) |
182 | return NULL; | |
183 | ||
b9ef520f | 184 | atomic_set(&ctx->ref, 1); |
1b52fa98 | 185 | init_completion(&ctx->comp); |
a5b74540 | 186 | ctx->file = file; |
a5b74540 | 187 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 188 | |
3b069c5d TH |
189 | mutex_lock(&ctx_id_mutex); |
190 | ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); | |
191 | mutex_unlock(&ctx_id_mutex); | |
192 | if (ctx->id < 0) | |
a5b74540 HR |
193 | goto error; |
194 | ||
0b2b35f6 | 195 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 196 | return ctx; |
0b2b35f6 | 197 | |
a5b74540 | 198 | error: |
a5b74540 | 199 | kfree(ctx); |
a5b74540 HR |
200 | return NULL; |
201 | } | |
07d357d0 | 202 | |
0b2b35f6 | 203 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
204 | struct ib_cm_req_event_param *kreq) |
205 | { | |
a5b74540 HR |
206 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
207 | ureq->remote_qkey = kreq->remote_qkey; | |
208 | ureq->remote_qpn = kreq->remote_qpn; | |
209 | ureq->qp_type = kreq->qp_type; | |
210 | ureq->starting_psn = kreq->starting_psn; | |
211 | ureq->responder_resources = kreq->responder_resources; | |
212 | ureq->initiator_depth = kreq->initiator_depth; | |
213 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
214 | ureq->flow_control = kreq->flow_control; | |
215 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
216 | ureq->retry_count = kreq->retry_count; | |
217 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
218 | ureq->srq = kreq->srq; | |
07d357d0 | 219 | ureq->port = kreq->port; |
a5b74540 | 220 | |
6a9af2e1 SH |
221 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
222 | if (kreq->alternate_path) | |
223 | ib_copy_path_rec_to_user(&ureq->alternate_path, | |
224 | kreq->alternate_path); | |
a5b74540 HR |
225 | } |
226 | ||
227 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
228 | struct ib_cm_rep_event_param *krep) | |
229 | { | |
230 | urep->remote_ca_guid = krep->remote_ca_guid; | |
231 | urep->remote_qkey = krep->remote_qkey; | |
232 | urep->remote_qpn = krep->remote_qpn; | |
233 | urep->starting_psn = krep->starting_psn; | |
234 | urep->responder_resources = krep->responder_resources; | |
235 | urep->initiator_depth = krep->initiator_depth; | |
236 | urep->target_ack_delay = krep->target_ack_delay; | |
237 | urep->failover_accepted = krep->failover_accepted; | |
238 | urep->flow_control = krep->flow_control; | |
239 | urep->rnr_retry_count = krep->rnr_retry_count; | |
240 | urep->srq = krep->srq; | |
241 | } | |
242 | ||
a5b74540 HR |
243 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
244 | struct ib_cm_sidr_rep_event_param *krep) | |
245 | { | |
246 | urep->status = krep->status; | |
247 | urep->qkey = krep->qkey; | |
248 | urep->qpn = krep->qpn; | |
249 | }; | |
250 | ||
0b2b35f6 | 251 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
252 | struct ib_ucm_event *uvt) |
253 | { | |
254 | void *info = NULL; | |
a5b74540 HR |
255 | |
256 | switch (evt->event) { | |
257 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 258 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
259 | &evt->param.req_rcvd); |
260 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 261 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
262 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
263 | IB_UCM_PRES_ALTERNATE : 0); | |
264 | break; | |
265 | case IB_CM_REP_RECEIVED: | |
266 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
267 | &evt->param.rep_rcvd); | |
268 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
269 | break; |
270 | case IB_CM_RTU_RECEIVED: | |
271 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
272 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
273 | break; |
274 | case IB_CM_DREQ_RECEIVED: | |
275 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
276 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
277 | break; |
278 | case IB_CM_DREP_RECEIVED: | |
279 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
280 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
281 | break; |
282 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
283 | uvt->resp.u.mra_resp.timeout = |
284 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 285 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
286 | break; |
287 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 288 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
289 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
290 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
291 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
292 | break; |
293 | case IB_CM_LAP_RECEIVED: | |
6a9af2e1 SH |
294 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
295 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 296 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 297 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
298 | break; |
299 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 300 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
301 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
302 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
303 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
304 | break; |
305 | case IB_CM_SIDR_REQ_RECEIVED: | |
3cd96564 | 306 | uvt->resp.u.sidr_req_resp.pkey = |
0b2b35f6 | 307 | evt->param.sidr_req_rcvd.pkey; |
3cd96564 | 308 | uvt->resp.u.sidr_req_resp.port = |
07d357d0 | 309 | evt->param.sidr_req_rcvd.port; |
a5b74540 | 310 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
311 | break; |
312 | case IB_CM_SIDR_REP_RECEIVED: | |
313 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
314 | &evt->param.sidr_rep_rcvd); | |
315 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
316 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
317 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
318 | break; |
319 | default: | |
320 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
321 | break; |
322 | } | |
323 | ||
b9ef520f | 324 | if (uvt->data_len) { |
bed8bdfd | 325 | uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
326 | if (!uvt->data) |
327 | goto err1; | |
a5b74540 | 328 | |
a5b74540 HR |
329 | uvt->resp.present |= IB_UCM_PRES_DATA; |
330 | } | |
331 | ||
b9ef520f | 332 | if (uvt->info_len) { |
bed8bdfd | 333 | uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
334 | if (!uvt->info) |
335 | goto err2; | |
a5b74540 | 336 | |
a5b74540 HR |
337 | uvt->resp.present |= IB_UCM_PRES_INFO; |
338 | } | |
a5b74540 | 339 | return 0; |
b9ef520f SH |
340 | |
341 | err2: | |
79d81907 | 342 | kfree(uvt->data); |
b9ef520f SH |
343 | err1: |
344 | return -ENOMEM; | |
a5b74540 HR |
345 | } |
346 | ||
347 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
348 | struct ib_cm_event *event) | |
349 | { | |
350 | struct ib_ucm_event *uevent; | |
351 | struct ib_ucm_context *ctx; | |
352 | int result = 0; | |
a5b74540 | 353 | |
b9ef520f | 354 | ctx = cm_id->context; |
a5b74540 | 355 | |
de6eb66b | 356 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
357 | if (!uevent) |
358 | goto err1; | |
a5b74540 | 359 | |
0b2b35f6 SH |
360 | uevent->ctx = ctx; |
361 | uevent->cm_id = cm_id; | |
362 | uevent->resp.uid = ctx->uid; | |
363 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
364 | uevent->resp.event = event->event; |
365 | ||
0b2b35f6 | 366 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 367 | if (result) |
b9ef520f | 368 | goto err2; |
a5b74540 | 369 | |
4be10c1e | 370 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
371 | list_add_tail(&uevent->file_list, &ctx->file->events); |
372 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 373 | wake_up_interruptible(&ctx->file->poll_wait); |
4be10c1e | 374 | mutex_unlock(&ctx->file->file_mutex); |
b9ef520f SH |
375 | return 0; |
376 | ||
377 | err2: | |
378 | kfree(uevent); | |
379 | err1: | |
380 | /* Destroy new cm_id's */ | |
0b2b35f6 | 381 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
382 | } |
383 | ||
384 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
385 | const char __user *inbuf, | |
386 | int in_len, int out_len) | |
387 | { | |
388 | struct ib_ucm_context *ctx; | |
389 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 390 | struct ib_ucm_event *uevent; |
a5b74540 | 391 | int result = 0; |
a5b74540 HR |
392 | |
393 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
394 | return -ENOSPC; | |
395 | ||
396 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
397 | return -EFAULT; | |
07d357d0 | 398 | |
4be10c1e | 399 | mutex_lock(&file->file_mutex); |
a5b74540 | 400 | while (list_empty(&file->events)) { |
9d41b7fd | 401 | mutex_unlock(&file->file_mutex); |
a5b74540 | 402 | |
9d41b7fd SH |
403 | if (file->filp->f_flags & O_NONBLOCK) |
404 | return -EAGAIN; | |
a5b74540 | 405 | |
9d41b7fd SH |
406 | if (wait_event_interruptible(file->poll_wait, |
407 | !list_empty(&file->events))) | |
408 | return -ERESTARTSYS; | |
a5b74540 | 409 | |
4be10c1e | 410 | mutex_lock(&file->file_mutex); |
a5b74540 HR |
411 | } |
412 | ||
a5b74540 HR |
413 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); |
414 | ||
0b2b35f6 SH |
415 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
416 | ctx = ib_ucm_ctx_alloc(file); | |
417 | if (!ctx) { | |
418 | result = -ENOMEM; | |
419 | goto done; | |
420 | } | |
a5b74540 | 421 | |
0b2b35f6 SH |
422 | ctx->cm_id = uevent->cm_id; |
423 | ctx->cm_id->context = ctx; | |
424 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
425 | } |
426 | ||
a5b74540 HR |
427 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
428 | &uevent->resp, sizeof(uevent->resp))) { | |
429 | result = -EFAULT; | |
430 | goto done; | |
431 | } | |
432 | ||
433 | if (uevent->data) { | |
a5b74540 HR |
434 | if (cmd.data_len < uevent->data_len) { |
435 | result = -ENOMEM; | |
436 | goto done; | |
437 | } | |
a5b74540 HR |
438 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
439 | uevent->data, uevent->data_len)) { | |
440 | result = -EFAULT; | |
441 | goto done; | |
442 | } | |
443 | } | |
444 | ||
445 | if (uevent->info) { | |
a5b74540 HR |
446 | if (cmd.info_len < uevent->info_len) { |
447 | result = -ENOMEM; | |
448 | goto done; | |
449 | } | |
a5b74540 HR |
450 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
451 | uevent->info, uevent->info_len)) { | |
452 | result = -EFAULT; | |
453 | goto done; | |
454 | } | |
455 | } | |
456 | ||
457 | list_del(&uevent->file_list); | |
458 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 459 | uevent->ctx->events_reported++; |
a5b74540 | 460 | |
79d81907 HR |
461 | kfree(uevent->data); |
462 | kfree(uevent->info); | |
a5b74540 HR |
463 | kfree(uevent); |
464 | done: | |
4be10c1e | 465 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
466 | return result; |
467 | } | |
468 | ||
a5b74540 HR |
469 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
470 | const char __user *inbuf, | |
471 | int in_len, int out_len) | |
472 | { | |
473 | struct ib_ucm_create_id cmd; | |
474 | struct ib_ucm_create_id_resp resp; | |
475 | struct ib_ucm_context *ctx; | |
476 | int result; | |
477 | ||
478 | if (out_len < sizeof(resp)) | |
479 | return -ENOSPC; | |
480 | ||
481 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
482 | return -EFAULT; | |
483 | ||
4be10c1e | 484 | mutex_lock(&file->file_mutex); |
a5b74540 | 485 | ctx = ib_ucm_ctx_alloc(file); |
4be10c1e | 486 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
487 | if (!ctx) |
488 | return -ENOMEM; | |
489 | ||
0b2b35f6 | 490 | ctx->uid = cmd.uid; |
07d357d0 SH |
491 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
492 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
493 | if (IS_ERR(ctx->cm_id)) { |
494 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 495 | goto err1; |
a5b74540 HR |
496 | } |
497 | ||
498 | resp.id = ctx->id; | |
499 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
500 | &resp, sizeof(resp))) { | |
501 | result = -EFAULT; | |
07d357d0 | 502 | goto err2; |
a5b74540 | 503 | } |
a5b74540 | 504 | return 0; |
a5b74540 | 505 | |
07d357d0 SH |
506 | err2: |
507 | ib_destroy_cm_id(ctx->cm_id); | |
508 | err1: | |
95ed644f | 509 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 510 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 511 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 512 | kfree(ctx); |
a5b74540 HR |
513 | return result; |
514 | } | |
515 | ||
516 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
517 | const char __user *inbuf, | |
518 | int in_len, int out_len) | |
519 | { | |
520 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
521 | struct ib_ucm_destroy_id_resp resp; |
522 | struct ib_ucm_context *ctx; | |
523 | int result = 0; | |
524 | ||
525 | if (out_len < sizeof(resp)) | |
526 | return -ENOSPC; | |
a5b74540 HR |
527 | |
528 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
529 | return -EFAULT; | |
530 | ||
95ed644f | 531 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
532 | ctx = idr_find(&ctx_id_table, cmd.id); |
533 | if (!ctx) | |
534 | ctx = ERR_PTR(-ENOENT); | |
535 | else if (ctx->file != file) | |
536 | ctx = ERR_PTR(-EINVAL); | |
537 | else | |
538 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 539 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
540 | |
541 | if (IS_ERR(ctx)) | |
542 | return PTR_ERR(ctx); | |
543 | ||
1b52fa98 SH |
544 | ib_ucm_ctx_put(ctx); |
545 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
546 | |
547 | /* No new events will be generated after destroying the cm_id. */ | |
548 | ib_destroy_cm_id(ctx->cm_id); | |
549 | /* Cleanup events not yet reported to the user. */ | |
550 | ib_ucm_cleanup_events(ctx); | |
551 | ||
552 | resp.events_reported = ctx->events_reported; | |
553 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
554 | &resp, sizeof(resp))) | |
555 | result = -EFAULT; | |
556 | ||
557 | kfree(ctx); | |
558 | return result; | |
a5b74540 HR |
559 | } |
560 | ||
561 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
562 | const char __user *inbuf, | |
563 | int in_len, int out_len) | |
564 | { | |
565 | struct ib_ucm_attr_id_resp resp; | |
566 | struct ib_ucm_attr_id cmd; | |
567 | struct ib_ucm_context *ctx; | |
568 | int result = 0; | |
569 | ||
570 | if (out_len < sizeof(resp)) | |
571 | return -ENOSPC; | |
572 | ||
573 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
574 | return -EFAULT; | |
575 | ||
b9ef520f SH |
576 | ctx = ib_ucm_ctx_get(file, cmd.id); |
577 | if (IS_ERR(ctx)) | |
578 | return PTR_ERR(ctx); | |
a5b74540 HR |
579 | |
580 | resp.service_id = ctx->cm_id->service_id; | |
581 | resp.service_mask = ctx->cm_id->service_mask; | |
582 | resp.local_id = ctx->cm_id->local_id; | |
583 | resp.remote_id = ctx->cm_id->remote_id; | |
584 | ||
585 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
586 | &resp, sizeof(resp))) | |
587 | result = -EFAULT; | |
588 | ||
b9ef520f | 589 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
590 | return result; |
591 | } | |
592 | ||
0b2b35f6 SH |
593 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
594 | const char __user *inbuf, | |
595 | int in_len, int out_len) | |
596 | { | |
6a9af2e1 | 597 | struct ib_uverbs_qp_attr resp; |
0b2b35f6 SH |
598 | struct ib_ucm_init_qp_attr cmd; |
599 | struct ib_ucm_context *ctx; | |
600 | struct ib_qp_attr qp_attr; | |
601 | int result = 0; | |
602 | ||
603 | if (out_len < sizeof(resp)) | |
604 | return -ENOSPC; | |
605 | ||
606 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
607 | return -EFAULT; | |
608 | ||
609 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
610 | if (IS_ERR(ctx)) | |
611 | return PTR_ERR(ctx); | |
612 | ||
613 | resp.qp_attr_mask = 0; | |
614 | memset(&qp_attr, 0, sizeof qp_attr); | |
615 | qp_attr.qp_state = cmd.qp_state; | |
616 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
617 | if (result) | |
618 | goto out; | |
619 | ||
6a9af2e1 | 620 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
0b2b35f6 SH |
621 | |
622 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
623 | &resp, sizeof(resp))) | |
624 | result = -EFAULT; | |
625 | ||
626 | out: | |
627 | ib_ucm_ctx_put(ctx); | |
628 | return result; | |
629 | } | |
630 | ||
6e61d04f SH |
631 | static int ucm_validate_listen(__be64 service_id, __be64 service_mask) |
632 | { | |
633 | service_id &= service_mask; | |
634 | ||
635 | if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || | |
636 | ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) | |
637 | return -EINVAL; | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
a5b74540 HR |
642 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
643 | const char __user *inbuf, | |
644 | int in_len, int out_len) | |
645 | { | |
646 | struct ib_ucm_listen cmd; | |
647 | struct ib_ucm_context *ctx; | |
648 | int result; | |
649 | ||
650 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
651 | return -EFAULT; | |
652 | ||
b9ef520f SH |
653 | ctx = ib_ucm_ctx_get(file, cmd.id); |
654 | if (IS_ERR(ctx)) | |
655 | return PTR_ERR(ctx); | |
a5b74540 | 656 | |
6e61d04f SH |
657 | result = ucm_validate_listen(cmd.service_id, cmd.service_mask); |
658 | if (result) | |
659 | goto out; | |
660 | ||
73fec7fd | 661 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
6e61d04f | 662 | out: |
b9ef520f | 663 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
664 | return result; |
665 | } | |
666 | ||
e1444b5a SH |
667 | static ssize_t ib_ucm_notify(struct ib_ucm_file *file, |
668 | const char __user *inbuf, | |
669 | int in_len, int out_len) | |
a5b74540 | 670 | { |
e1444b5a | 671 | struct ib_ucm_notify cmd; |
a5b74540 HR |
672 | struct ib_ucm_context *ctx; |
673 | int result; | |
674 | ||
675 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
676 | return -EFAULT; | |
677 | ||
b9ef520f SH |
678 | ctx = ib_ucm_ctx_get(file, cmd.id); |
679 | if (IS_ERR(ctx)) | |
680 | return PTR_ERR(ctx); | |
a5b74540 | 681 | |
e1444b5a | 682 | result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
b9ef520f | 683 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
684 | return result; |
685 | } | |
686 | ||
687 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
688 | { | |
689 | void *data; | |
690 | ||
691 | *dest = NULL; | |
692 | ||
693 | if (!len) | |
694 | return 0; | |
695 | ||
e642df6a JL |
696 | data = memdup_user((void __user *)(unsigned long)src, len); |
697 | if (IS_ERR(data)) | |
698 | return PTR_ERR(data); | |
a5b74540 HR |
699 | |
700 | *dest = data; | |
701 | return 0; | |
702 | } | |
703 | ||
704 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
705 | { | |
6a9af2e1 | 706 | struct ib_user_path_rec upath; |
a5b74540 HR |
707 | struct ib_sa_path_rec *sa_path; |
708 | ||
709 | *path = NULL; | |
710 | ||
711 | if (!src) | |
712 | return 0; | |
713 | ||
714 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
715 | if (!sa_path) | |
716 | return -ENOMEM; | |
717 | ||
6a9af2e1 SH |
718 | if (copy_from_user(&upath, (void __user *)(unsigned long)src, |
719 | sizeof(upath))) { | |
a5b74540 HR |
720 | |
721 | kfree(sa_path); | |
722 | return -EFAULT; | |
723 | } | |
724 | ||
6a9af2e1 | 725 | ib_copy_path_rec_from_user(sa_path, &upath); |
a5b74540 HR |
726 | *path = sa_path; |
727 | return 0; | |
728 | } | |
729 | ||
730 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
731 | const char __user *inbuf, | |
732 | int in_len, int out_len) | |
733 | { | |
734 | struct ib_cm_req_param param; | |
735 | struct ib_ucm_context *ctx; | |
736 | struct ib_ucm_req cmd; | |
737 | int result; | |
738 | ||
739 | param.private_data = NULL; | |
740 | param.primary_path = NULL; | |
741 | param.alternate_path = NULL; | |
742 | ||
743 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
744 | return -EFAULT; | |
745 | ||
746 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
747 | if (result) | |
748 | goto done; | |
749 | ||
750 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
751 | if (result) | |
752 | goto done; | |
753 | ||
754 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
755 | if (result) | |
756 | goto done; | |
757 | ||
758 | param.private_data_len = cmd.len; | |
759 | param.service_id = cmd.sid; | |
760 | param.qp_num = cmd.qpn; | |
761 | param.qp_type = cmd.qp_type; | |
762 | param.starting_psn = cmd.psn; | |
763 | param.peer_to_peer = cmd.peer_to_peer; | |
764 | param.responder_resources = cmd.responder_resources; | |
765 | param.initiator_depth = cmd.initiator_depth; | |
766 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
767 | param.flow_control = cmd.flow_control; | |
768 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
769 | param.retry_count = cmd.retry_count; | |
770 | param.rnr_retry_count = cmd.rnr_retry_count; | |
771 | param.max_cm_retries = cmd.max_cm_retries; | |
772 | param.srq = cmd.srq; | |
773 | ||
b9ef520f SH |
774 | ctx = ib_ucm_ctx_get(file, cmd.id); |
775 | if (!IS_ERR(ctx)) { | |
a5b74540 | 776 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
777 | ib_ucm_ctx_put(ctx); |
778 | } else | |
779 | result = PTR_ERR(ctx); | |
a5b74540 | 780 | |
a5b74540 | 781 | done: |
79d81907 HR |
782 | kfree(param.private_data); |
783 | kfree(param.primary_path); | |
784 | kfree(param.alternate_path); | |
a5b74540 HR |
785 | return result; |
786 | } | |
787 | ||
788 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
789 | const char __user *inbuf, | |
790 | int in_len, int out_len) | |
791 | { | |
792 | struct ib_cm_rep_param param; | |
793 | struct ib_ucm_context *ctx; | |
794 | struct ib_ucm_rep cmd; | |
795 | int result; | |
796 | ||
797 | param.private_data = NULL; | |
798 | ||
799 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
800 | return -EFAULT; | |
801 | ||
802 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
803 | if (result) | |
804 | return result; | |
805 | ||
806 | param.qp_num = cmd.qpn; | |
807 | param.starting_psn = cmd.psn; | |
808 | param.private_data_len = cmd.len; | |
809 | param.responder_resources = cmd.responder_resources; | |
810 | param.initiator_depth = cmd.initiator_depth; | |
a5b74540 HR |
811 | param.failover_accepted = cmd.failover_accepted; |
812 | param.flow_control = cmd.flow_control; | |
813 | param.rnr_retry_count = cmd.rnr_retry_count; | |
814 | param.srq = cmd.srq; | |
815 | ||
b9ef520f SH |
816 | ctx = ib_ucm_ctx_get(file, cmd.id); |
817 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 818 | ctx->uid = cmd.uid; |
a5b74540 | 819 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
820 | ib_ucm_ctx_put(ctx); |
821 | } else | |
822 | result = PTR_ERR(ctx); | |
a5b74540 | 823 | |
79d81907 | 824 | kfree(param.private_data); |
a5b74540 HR |
825 | return result; |
826 | } | |
827 | ||
828 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
829 | const char __user *inbuf, int in_len, | |
830 | int (*func)(struct ib_cm_id *cm_id, | |
831 | const void *private_data, | |
832 | u8 private_data_len)) | |
833 | { | |
834 | struct ib_ucm_private_data cmd; | |
835 | struct ib_ucm_context *ctx; | |
836 | const void *private_data = NULL; | |
837 | int result; | |
838 | ||
839 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
840 | return -EFAULT; | |
841 | ||
842 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
843 | if (result) | |
844 | return result; | |
845 | ||
b9ef520f SH |
846 | ctx = ib_ucm_ctx_get(file, cmd.id); |
847 | if (!IS_ERR(ctx)) { | |
a5b74540 | 848 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
849 | ib_ucm_ctx_put(ctx); |
850 | } else | |
851 | result = PTR_ERR(ctx); | |
a5b74540 | 852 | |
79d81907 | 853 | kfree(private_data); |
a5b74540 HR |
854 | return result; |
855 | } | |
856 | ||
857 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
858 | const char __user *inbuf, | |
859 | int in_len, int out_len) | |
860 | { | |
861 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
862 | } | |
863 | ||
864 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
865 | const char __user *inbuf, | |
866 | int in_len, int out_len) | |
867 | { | |
868 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
869 | } | |
870 | ||
871 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
872 | const char __user *inbuf, | |
873 | int in_len, int out_len) | |
874 | { | |
875 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
876 | } | |
877 | ||
878 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
879 | const char __user *inbuf, int in_len, | |
880 | int (*func)(struct ib_cm_id *cm_id, | |
881 | int status, | |
882 | const void *info, | |
883 | u8 info_len, | |
884 | const void *data, | |
885 | u8 data_len)) | |
886 | { | |
887 | struct ib_ucm_context *ctx; | |
888 | struct ib_ucm_info cmd; | |
889 | const void *data = NULL; | |
890 | const void *info = NULL; | |
891 | int result; | |
892 | ||
893 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
894 | return -EFAULT; | |
895 | ||
896 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
897 | if (result) | |
898 | goto done; | |
899 | ||
900 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
901 | if (result) | |
902 | goto done; | |
903 | ||
b9ef520f SH |
904 | ctx = ib_ucm_ctx_get(file, cmd.id); |
905 | if (!IS_ERR(ctx)) { | |
906 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 907 | data, cmd.data_len); |
b9ef520f SH |
908 | ib_ucm_ctx_put(ctx); |
909 | } else | |
910 | result = PTR_ERR(ctx); | |
a5b74540 | 911 | |
a5b74540 | 912 | done: |
79d81907 HR |
913 | kfree(data); |
914 | kfree(info); | |
a5b74540 HR |
915 | return result; |
916 | } | |
917 | ||
918 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
919 | const char __user *inbuf, | |
920 | int in_len, int out_len) | |
921 | { | |
922 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
923 | } | |
924 | ||
925 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
926 | const char __user *inbuf, | |
927 | int in_len, int out_len) | |
928 | { | |
929 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
930 | } | |
931 | ||
932 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
933 | const char __user *inbuf, | |
934 | int in_len, int out_len) | |
935 | { | |
936 | struct ib_ucm_context *ctx; | |
937 | struct ib_ucm_mra cmd; | |
938 | const void *data = NULL; | |
939 | int result; | |
940 | ||
941 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
942 | return -EFAULT; | |
943 | ||
944 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
945 | if (result) | |
946 | return result; | |
947 | ||
b9ef520f SH |
948 | ctx = ib_ucm_ctx_get(file, cmd.id); |
949 | if (!IS_ERR(ctx)) { | |
950 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
951 | ib_ucm_ctx_put(ctx); | |
952 | } else | |
953 | result = PTR_ERR(ctx); | |
a5b74540 | 954 | |
79d81907 | 955 | kfree(data); |
a5b74540 HR |
956 | return result; |
957 | } | |
958 | ||
959 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
960 | const char __user *inbuf, | |
961 | int in_len, int out_len) | |
962 | { | |
963 | struct ib_ucm_context *ctx; | |
964 | struct ib_sa_path_rec *path = NULL; | |
965 | struct ib_ucm_lap cmd; | |
966 | const void *data = NULL; | |
967 | int result; | |
968 | ||
969 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
970 | return -EFAULT; | |
971 | ||
972 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
973 | if (result) | |
974 | goto done; | |
975 | ||
976 | result = ib_ucm_path_get(&path, cmd.path); | |
977 | if (result) | |
978 | goto done; | |
979 | ||
b9ef520f SH |
980 | ctx = ib_ucm_ctx_get(file, cmd.id); |
981 | if (!IS_ERR(ctx)) { | |
a5b74540 | 982 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
983 | ib_ucm_ctx_put(ctx); |
984 | } else | |
985 | result = PTR_ERR(ctx); | |
a5b74540 | 986 | |
a5b74540 | 987 | done: |
79d81907 HR |
988 | kfree(data); |
989 | kfree(path); | |
a5b74540 HR |
990 | return result; |
991 | } | |
992 | ||
993 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
994 | const char __user *inbuf, | |
995 | int in_len, int out_len) | |
996 | { | |
997 | struct ib_cm_sidr_req_param param; | |
998 | struct ib_ucm_context *ctx; | |
999 | struct ib_ucm_sidr_req cmd; | |
1000 | int result; | |
1001 | ||
1002 | param.private_data = NULL; | |
1003 | param.path = NULL; | |
1004 | ||
1005 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1006 | return -EFAULT; | |
1007 | ||
1008 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1009 | if (result) | |
1010 | goto done; | |
1011 | ||
1012 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1013 | if (result) | |
1014 | goto done; | |
1015 | ||
1016 | param.private_data_len = cmd.len; | |
1017 | param.service_id = cmd.sid; | |
1018 | param.timeout_ms = cmd.timeout; | |
1019 | param.max_cm_retries = cmd.max_cm_retries; | |
a5b74540 | 1020 | |
b9ef520f SH |
1021 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1022 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1023 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1024 | ib_ucm_ctx_put(ctx); |
1025 | } else | |
1026 | result = PTR_ERR(ctx); | |
a5b74540 | 1027 | |
a5b74540 | 1028 | done: |
79d81907 HR |
1029 | kfree(param.private_data); |
1030 | kfree(param.path); | |
a5b74540 HR |
1031 | return result; |
1032 | } | |
1033 | ||
1034 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1035 | const char __user *inbuf, | |
1036 | int in_len, int out_len) | |
1037 | { | |
1038 | struct ib_cm_sidr_rep_param param; | |
1039 | struct ib_ucm_sidr_rep cmd; | |
1040 | struct ib_ucm_context *ctx; | |
1041 | int result; | |
1042 | ||
1043 | param.info = NULL; | |
1044 | ||
1045 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1046 | return -EFAULT; | |
1047 | ||
1048 | result = ib_ucm_alloc_data(¶m.private_data, | |
1049 | cmd.data, cmd.data_len); | |
1050 | if (result) | |
1051 | goto done; | |
1052 | ||
1053 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1054 | if (result) | |
1055 | goto done; | |
1056 | ||
b9ef520f SH |
1057 | param.qp_num = cmd.qpn; |
1058 | param.qkey = cmd.qkey; | |
1059 | param.status = cmd.status; | |
1060 | param.info_length = cmd.info_len; | |
1061 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1062 | |
b9ef520f SH |
1063 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1064 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1065 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1066 | ib_ucm_ctx_put(ctx); |
1067 | } else | |
1068 | result = PTR_ERR(ctx); | |
a5b74540 | 1069 | |
a5b74540 | 1070 | done: |
79d81907 HR |
1071 | kfree(param.private_data); |
1072 | kfree(param.info); | |
a5b74540 HR |
1073 | return result; |
1074 | } | |
1075 | ||
1076 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1077 | const char __user *inbuf, | |
1078 | int in_len, int out_len) = { | |
1079 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1080 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1081 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1082 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
e1444b5a | 1083 | [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, |
a5b74540 HR |
1084 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, |
1085 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1086 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1087 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1088 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1089 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1090 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1091 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1092 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1093 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1094 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1095 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1096 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1097 | }; |
1098 | ||
1099 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1100 | size_t len, loff_t *pos) | |
1101 | { | |
1102 | struct ib_ucm_file *file = filp->private_data; | |
1103 | struct ib_ucm_cmd_hdr hdr; | |
1104 | ssize_t result; | |
1105 | ||
1106 | if (len < sizeof(hdr)) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1110 | return -EFAULT; | |
1111 | ||
caf6e3f2 | 1112 | if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
a5b74540 HR |
1113 | return -EINVAL; |
1114 | ||
1115 | if (hdr.in + sizeof(hdr) > len) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1119 | hdr.in, hdr.out); | |
1120 | if (!result) | |
1121 | result = len; | |
1122 | ||
1123 | return result; | |
1124 | } | |
1125 | ||
1126 | static unsigned int ib_ucm_poll(struct file *filp, | |
1127 | struct poll_table_struct *wait) | |
1128 | { | |
1129 | struct ib_ucm_file *file = filp->private_data; | |
1130 | unsigned int mask = 0; | |
1131 | ||
1132 | poll_wait(filp, &file->poll_wait, wait); | |
1133 | ||
1134 | if (!list_empty(&file->events)) | |
1135 | mask = POLLIN | POLLRDNORM; | |
1136 | ||
1137 | return mask; | |
1138 | } | |
1139 | ||
5ba18b18 RD |
1140 | /* |
1141 | * ib_ucm_open() does not need the BKL: | |
1142 | * | |
1143 | * - no global state is referred to; | |
1144 | * - there is no ioctl method to race against; | |
1145 | * - no further module initialization is required for open to work | |
1146 | * after the device is registered. | |
1147 | */ | |
a5b74540 HR |
1148 | static int ib_ucm_open(struct inode *inode, struct file *filp) |
1149 | { | |
1150 | struct ib_ucm_file *file; | |
1151 | ||
1152 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1153 | if (!file) | |
1154 | return -ENOMEM; | |
1155 | ||
1156 | INIT_LIST_HEAD(&file->events); | |
1157 | INIT_LIST_HEAD(&file->ctxs); | |
1158 | init_waitqueue_head(&file->poll_wait); | |
1159 | ||
4be10c1e | 1160 | mutex_init(&file->file_mutex); |
a5b74540 HR |
1161 | |
1162 | filp->private_data = file; | |
1163 | file->filp = filp; | |
f4e91eb4 | 1164 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); |
a5b74540 | 1165 | |
bc1db9af | 1166 | return nonseekable_open(inode, filp); |
a5b74540 HR |
1167 | } |
1168 | ||
1169 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1170 | { | |
1171 | struct ib_ucm_file *file = filp->private_data; | |
1172 | struct ib_ucm_context *ctx; | |
1173 | ||
4be10c1e | 1174 | mutex_lock(&file->file_mutex); |
a5b74540 | 1175 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1176 | ctx = list_entry(file->ctxs.next, |
1177 | struct ib_ucm_context, file_list); | |
4be10c1e | 1178 | mutex_unlock(&file->file_mutex); |
0b2b35f6 | 1179 | |
95ed644f | 1180 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1181 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1182 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1183 | |
1184 | ib_destroy_cm_id(ctx->cm_id); | |
1185 | ib_ucm_cleanup_events(ctx); | |
1186 | kfree(ctx); | |
1187 | ||
4be10c1e | 1188 | mutex_lock(&file->file_mutex); |
a5b74540 | 1189 | } |
4be10c1e | 1190 | mutex_unlock(&file->file_mutex); |
a5b74540 | 1191 | kfree(file); |
a5b74540 HR |
1192 | return 0; |
1193 | } | |
1194 | ||
59d40dd9 | 1195 | static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); |
f4e91eb4 | 1196 | static void ib_ucm_release_dev(struct device *dev) |
07d357d0 | 1197 | { |
f4e91eb4 | 1198 | struct ib_ucm_device *ucm_dev; |
07d357d0 | 1199 | |
f4e91eb4 TJ |
1200 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1201 | cdev_del(&ucm_dev->cdev); | |
daa91358 AC |
1202 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1203 | clear_bit(ucm_dev->devnum, dev_map); | |
1204 | else | |
59d40dd9 | 1205 | clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_map); |
f4e91eb4 | 1206 | kfree(ucm_dev); |
07d357d0 SH |
1207 | } |
1208 | ||
2b8693c0 | 1209 | static const struct file_operations ucm_fops = { |
cdb8e438 AC |
1210 | .owner = THIS_MODULE, |
1211 | .open = ib_ucm_open, | |
a5b74540 | 1212 | .release = ib_ucm_close, |
cdb8e438 | 1213 | .write = ib_ucm_write, |
a5b74540 | 1214 | .poll = ib_ucm_poll, |
bc1db9af | 1215 | .llseek = no_llseek, |
a5b74540 HR |
1216 | }; |
1217 | ||
f4e91eb4 TJ |
1218 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1219 | char *buf) | |
07d357d0 | 1220 | { |
f4e91eb4 | 1221 | struct ib_ucm_device *ucm_dev; |
3cd96564 | 1222 | |
f4e91eb4 TJ |
1223 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1224 | return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); | |
07d357d0 | 1225 | } |
f4e91eb4 | 1226 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
a5b74540 | 1227 | |
daa91358 | 1228 | static dev_t overflow_maj; |
daa91358 AC |
1229 | static int find_overflow_devnum(void) |
1230 | { | |
1231 | int ret; | |
1232 | ||
1233 | if (!overflow_maj) { | |
1234 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, | |
1235 | "infiniband_cm"); | |
1236 | if (ret) { | |
aba25a3e | 1237 | pr_err("ucm: couldn't register dynamic device number\n"); |
daa91358 AC |
1238 | return ret; |
1239 | } | |
1240 | } | |
1241 | ||
1242 | ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); | |
1243 | if (ret >= IB_UCM_MAX_DEVICES) | |
1244 | return -1; | |
1245 | ||
1246 | return ret; | |
1247 | } | |
1248 | ||
07d357d0 | 1249 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1250 | { |
dd08f702 | 1251 | int devnum; |
31d14b6e | 1252 | dev_t base; |
07d357d0 | 1253 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1254 | |
72219cea | 1255 | if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) |
07d357d0 SH |
1256 | return; |
1257 | ||
de6eb66b | 1258 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1259 | if (!ucm_dev) |
1260 | return; | |
a5b74540 | 1261 | |
07d357d0 | 1262 | ucm_dev->ib_dev = device; |
a5b74540 | 1263 | |
dd08f702 | 1264 | devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1265 | if (devnum >= IB_UCM_MAX_DEVICES) { |
1266 | devnum = find_overflow_devnum(); | |
1267 | if (devnum < 0) | |
1268 | goto err; | |
1269 | ||
1270 | ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; | |
1271 | base = devnum + overflow_maj; | |
1272 | set_bit(devnum, overflow_map); | |
1273 | } else { | |
1274 | ucm_dev->devnum = devnum; | |
1275 | base = devnum + IB_UCM_BASE_DEV; | |
1276 | set_bit(devnum, dev_map); | |
1277 | } | |
07d357d0 | 1278 | |
f4e91eb4 TJ |
1279 | cdev_init(&ucm_dev->cdev, &ucm_fops); |
1280 | ucm_dev->cdev.owner = THIS_MODULE; | |
1281 | kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); | |
31d14b6e | 1282 | if (cdev_add(&ucm_dev->cdev, base, 1)) |
07d357d0 SH |
1283 | goto err; |
1284 | ||
f4e91eb4 TJ |
1285 | ucm_dev->dev.class = &cm_class; |
1286 | ucm_dev->dev.parent = device->dma_device; | |
1287 | ucm_dev->dev.devt = ucm_dev->cdev.dev; | |
1288 | ucm_dev->dev.release = ib_ucm_release_dev; | |
d927e38c | 1289 | dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); |
f4e91eb4 | 1290 | if (device_register(&ucm_dev->dev)) |
a5b74540 | 1291 | goto err_cdev; |
a5b74540 | 1292 | |
f4e91eb4 TJ |
1293 | if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) |
1294 | goto err_dev; | |
07d357d0 SH |
1295 | |
1296 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1297 | return; | |
1298 | ||
f4e91eb4 TJ |
1299 | err_dev: |
1300 | device_unregister(&ucm_dev->dev); | |
07d357d0 | 1301 | err_cdev: |
f4e91eb4 | 1302 | cdev_del(&ucm_dev->cdev); |
daa91358 AC |
1303 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1304 | clear_bit(devnum, dev_map); | |
1305 | else | |
1306 | clear_bit(devnum, overflow_map); | |
07d357d0 SH |
1307 | err: |
1308 | kfree(ucm_dev); | |
1309 | return; | |
1310 | } | |
1311 | ||
7c1eb45a | 1312 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data) |
07d357d0 | 1313 | { |
7c1eb45a | 1314 | struct ib_ucm_device *ucm_dev = client_data; |
07d357d0 SH |
1315 | |
1316 | if (!ucm_dev) | |
1317 | return; | |
1318 | ||
f4e91eb4 | 1319 | device_unregister(&ucm_dev->dev); |
07d357d0 SH |
1320 | } |
1321 | ||
0933e2d9 AK |
1322 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1323 | __stringify(IB_USER_CM_ABI_VERSION)); | |
07d357d0 SH |
1324 | |
1325 | static int __init ib_ucm_init(void) | |
1326 | { | |
1327 | int ret; | |
1328 | ||
1329 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1330 | "infiniband_cm"); | |
1331 | if (ret) { | |
aba25a3e | 1332 | pr_err("ucm: couldn't register device number\n"); |
9af57b7a | 1333 | goto error1; |
a5b74540 HR |
1334 | } |
1335 | ||
0933e2d9 | 1336 | ret = class_create_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1337 | if (ret) { |
aba25a3e | 1338 | pr_err("ucm: couldn't create abi_version attribute\n"); |
9af57b7a | 1339 | goto error2; |
07d357d0 | 1340 | } |
a5b74540 | 1341 | |
07d357d0 SH |
1342 | ret = ib_register_client(&ucm_client); |
1343 | if (ret) { | |
aba25a3e | 1344 | pr_err("ucm: couldn't register client\n"); |
9af57b7a | 1345 | goto error3; |
07d357d0 | 1346 | } |
a5b74540 | 1347 | return 0; |
07d357d0 | 1348 | |
9af57b7a | 1349 | error3: |
0933e2d9 | 1350 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
9af57b7a | 1351 | error2: |
07d357d0 | 1352 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
9af57b7a | 1353 | error1: |
07d357d0 | 1354 | return ret; |
a5b74540 HR |
1355 | } |
1356 | ||
1357 | static void __exit ib_ucm_cleanup(void) | |
1358 | { | |
07d357d0 | 1359 | ib_unregister_client(&ucm_client); |
0933e2d9 | 1360 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1361 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1362 | if (overflow_maj) |
1363 | unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1364 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1365 | } |
1366 | ||
1367 | module_init(ib_ucm_init); | |
1368 | module_exit(ib_ucm_cleanup); |