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. | |
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 SH |
111 | static void ib_ucm_add_one(struct ib_device *device); |
112 | static void ib_ucm_remove_one(struct ib_device *device); | |
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; | |
179 | int result; | |
180 | ||
de6eb66b | 181 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
182 | if (!ctx) |
183 | return NULL; | |
184 | ||
b9ef520f | 185 | atomic_set(&ctx->ref, 1); |
1b52fa98 | 186 | init_completion(&ctx->comp); |
a5b74540 | 187 | ctx->file = file; |
a5b74540 | 188 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 189 | |
0b2b35f6 SH |
190 | do { |
191 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
192 | if (!result) | |
193 | goto error; | |
a5b74540 | 194 | |
95ed644f | 195 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 196 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); |
95ed644f | 197 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 198 | } while (result == -EAGAIN); |
a5b74540 | 199 | |
a5b74540 HR |
200 | if (result) |
201 | goto error; | |
202 | ||
0b2b35f6 | 203 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 204 | return ctx; |
0b2b35f6 | 205 | |
a5b74540 | 206 | error: |
a5b74540 | 207 | kfree(ctx); |
a5b74540 HR |
208 | return NULL; |
209 | } | |
07d357d0 | 210 | |
0b2b35f6 | 211 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
212 | struct ib_cm_req_event_param *kreq) |
213 | { | |
a5b74540 HR |
214 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
215 | ureq->remote_qkey = kreq->remote_qkey; | |
216 | ureq->remote_qpn = kreq->remote_qpn; | |
217 | ureq->qp_type = kreq->qp_type; | |
218 | ureq->starting_psn = kreq->starting_psn; | |
219 | ureq->responder_resources = kreq->responder_resources; | |
220 | ureq->initiator_depth = kreq->initiator_depth; | |
221 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
222 | ureq->flow_control = kreq->flow_control; | |
223 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
224 | ureq->retry_count = kreq->retry_count; | |
225 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
226 | ureq->srq = kreq->srq; | |
07d357d0 | 227 | ureq->port = kreq->port; |
a5b74540 | 228 | |
6a9af2e1 SH |
229 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
230 | if (kreq->alternate_path) | |
231 | ib_copy_path_rec_to_user(&ureq->alternate_path, | |
232 | kreq->alternate_path); | |
a5b74540 HR |
233 | } |
234 | ||
235 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
236 | struct ib_cm_rep_event_param *krep) | |
237 | { | |
238 | urep->remote_ca_guid = krep->remote_ca_guid; | |
239 | urep->remote_qkey = krep->remote_qkey; | |
240 | urep->remote_qpn = krep->remote_qpn; | |
241 | urep->starting_psn = krep->starting_psn; | |
242 | urep->responder_resources = krep->responder_resources; | |
243 | urep->initiator_depth = krep->initiator_depth; | |
244 | urep->target_ack_delay = krep->target_ack_delay; | |
245 | urep->failover_accepted = krep->failover_accepted; | |
246 | urep->flow_control = krep->flow_control; | |
247 | urep->rnr_retry_count = krep->rnr_retry_count; | |
248 | urep->srq = krep->srq; | |
249 | } | |
250 | ||
a5b74540 HR |
251 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
252 | struct ib_cm_sidr_rep_event_param *krep) | |
253 | { | |
254 | urep->status = krep->status; | |
255 | urep->qkey = krep->qkey; | |
256 | urep->qpn = krep->qpn; | |
257 | }; | |
258 | ||
0b2b35f6 | 259 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
260 | struct ib_ucm_event *uvt) |
261 | { | |
262 | void *info = NULL; | |
a5b74540 HR |
263 | |
264 | switch (evt->event) { | |
265 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 266 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
267 | &evt->param.req_rcvd); |
268 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 269 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
270 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
271 | IB_UCM_PRES_ALTERNATE : 0); | |
272 | break; | |
273 | case IB_CM_REP_RECEIVED: | |
274 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
275 | &evt->param.rep_rcvd); | |
276 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
277 | break; |
278 | case IB_CM_RTU_RECEIVED: | |
279 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
280 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
281 | break; |
282 | case IB_CM_DREQ_RECEIVED: | |
283 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
284 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
285 | break; |
286 | case IB_CM_DREP_RECEIVED: | |
287 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
288 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
289 | break; |
290 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
291 | uvt->resp.u.mra_resp.timeout = |
292 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 293 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
294 | break; |
295 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 296 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
297 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
298 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
299 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
300 | break; |
301 | case IB_CM_LAP_RECEIVED: | |
6a9af2e1 SH |
302 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
303 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 304 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 305 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
306 | break; |
307 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 308 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
309 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
310 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
311 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
312 | break; |
313 | case IB_CM_SIDR_REQ_RECEIVED: | |
3cd96564 | 314 | uvt->resp.u.sidr_req_resp.pkey = |
0b2b35f6 | 315 | evt->param.sidr_req_rcvd.pkey; |
3cd96564 | 316 | uvt->resp.u.sidr_req_resp.port = |
07d357d0 | 317 | evt->param.sidr_req_rcvd.port; |
a5b74540 | 318 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
319 | break; |
320 | case IB_CM_SIDR_REP_RECEIVED: | |
321 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
322 | &evt->param.sidr_rep_rcvd); | |
323 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
324 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
325 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
326 | break; |
327 | default: | |
328 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
329 | break; |
330 | } | |
331 | ||
b9ef520f | 332 | if (uvt->data_len) { |
bed8bdfd | 333 | uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
334 | if (!uvt->data) |
335 | goto err1; | |
a5b74540 | 336 | |
a5b74540 HR |
337 | uvt->resp.present |= IB_UCM_PRES_DATA; |
338 | } | |
339 | ||
b9ef520f | 340 | if (uvt->info_len) { |
bed8bdfd | 341 | uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
342 | if (!uvt->info) |
343 | goto err2; | |
a5b74540 | 344 | |
a5b74540 HR |
345 | uvt->resp.present |= IB_UCM_PRES_INFO; |
346 | } | |
a5b74540 | 347 | return 0; |
b9ef520f SH |
348 | |
349 | err2: | |
79d81907 | 350 | kfree(uvt->data); |
b9ef520f SH |
351 | err1: |
352 | return -ENOMEM; | |
a5b74540 HR |
353 | } |
354 | ||
355 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
356 | struct ib_cm_event *event) | |
357 | { | |
358 | struct ib_ucm_event *uevent; | |
359 | struct ib_ucm_context *ctx; | |
360 | int result = 0; | |
a5b74540 | 361 | |
b9ef520f | 362 | ctx = cm_id->context; |
a5b74540 | 363 | |
de6eb66b | 364 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
365 | if (!uevent) |
366 | goto err1; | |
a5b74540 | 367 | |
0b2b35f6 SH |
368 | uevent->ctx = ctx; |
369 | uevent->cm_id = cm_id; | |
370 | uevent->resp.uid = ctx->uid; | |
371 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
372 | uevent->resp.event = event->event; |
373 | ||
0b2b35f6 | 374 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 375 | if (result) |
b9ef520f | 376 | goto err2; |
a5b74540 | 377 | |
4be10c1e | 378 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
379 | list_add_tail(&uevent->file_list, &ctx->file->events); |
380 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 381 | wake_up_interruptible(&ctx->file->poll_wait); |
4be10c1e | 382 | mutex_unlock(&ctx->file->file_mutex); |
b9ef520f SH |
383 | return 0; |
384 | ||
385 | err2: | |
386 | kfree(uevent); | |
387 | err1: | |
388 | /* Destroy new cm_id's */ | |
0b2b35f6 | 389 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
390 | } |
391 | ||
392 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
393 | const char __user *inbuf, | |
394 | int in_len, int out_len) | |
395 | { | |
396 | struct ib_ucm_context *ctx; | |
397 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 398 | struct ib_ucm_event *uevent; |
a5b74540 HR |
399 | int result = 0; |
400 | DEFINE_WAIT(wait); | |
401 | ||
402 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
403 | return -ENOSPC; | |
404 | ||
405 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
406 | return -EFAULT; | |
07d357d0 | 407 | |
4be10c1e | 408 | mutex_lock(&file->file_mutex); |
a5b74540 | 409 | while (list_empty(&file->events)) { |
9d41b7fd | 410 | mutex_unlock(&file->file_mutex); |
a5b74540 | 411 | |
9d41b7fd SH |
412 | if (file->filp->f_flags & O_NONBLOCK) |
413 | return -EAGAIN; | |
a5b74540 | 414 | |
9d41b7fd SH |
415 | if (wait_event_interruptible(file->poll_wait, |
416 | !list_empty(&file->events))) | |
417 | return -ERESTARTSYS; | |
a5b74540 | 418 | |
4be10c1e | 419 | mutex_lock(&file->file_mutex); |
a5b74540 HR |
420 | } |
421 | ||
a5b74540 HR |
422 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); |
423 | ||
0b2b35f6 SH |
424 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
425 | ctx = ib_ucm_ctx_alloc(file); | |
426 | if (!ctx) { | |
427 | result = -ENOMEM; | |
428 | goto done; | |
429 | } | |
a5b74540 | 430 | |
0b2b35f6 SH |
431 | ctx->cm_id = uevent->cm_id; |
432 | ctx->cm_id->context = ctx; | |
433 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
434 | } |
435 | ||
a5b74540 HR |
436 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
437 | &uevent->resp, sizeof(uevent->resp))) { | |
438 | result = -EFAULT; | |
439 | goto done; | |
440 | } | |
441 | ||
442 | if (uevent->data) { | |
a5b74540 HR |
443 | if (cmd.data_len < uevent->data_len) { |
444 | result = -ENOMEM; | |
445 | goto done; | |
446 | } | |
a5b74540 HR |
447 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
448 | uevent->data, uevent->data_len)) { | |
449 | result = -EFAULT; | |
450 | goto done; | |
451 | } | |
452 | } | |
453 | ||
454 | if (uevent->info) { | |
a5b74540 HR |
455 | if (cmd.info_len < uevent->info_len) { |
456 | result = -ENOMEM; | |
457 | goto done; | |
458 | } | |
a5b74540 HR |
459 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
460 | uevent->info, uevent->info_len)) { | |
461 | result = -EFAULT; | |
462 | goto done; | |
463 | } | |
464 | } | |
465 | ||
466 | list_del(&uevent->file_list); | |
467 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 468 | uevent->ctx->events_reported++; |
a5b74540 | 469 | |
79d81907 HR |
470 | kfree(uevent->data); |
471 | kfree(uevent->info); | |
a5b74540 HR |
472 | kfree(uevent); |
473 | done: | |
4be10c1e | 474 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
475 | return result; |
476 | } | |
477 | ||
a5b74540 HR |
478 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
479 | const char __user *inbuf, | |
480 | int in_len, int out_len) | |
481 | { | |
482 | struct ib_ucm_create_id cmd; | |
483 | struct ib_ucm_create_id_resp resp; | |
484 | struct ib_ucm_context *ctx; | |
485 | int result; | |
486 | ||
487 | if (out_len < sizeof(resp)) | |
488 | return -ENOSPC; | |
489 | ||
490 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
491 | return -EFAULT; | |
492 | ||
4be10c1e | 493 | mutex_lock(&file->file_mutex); |
a5b74540 | 494 | ctx = ib_ucm_ctx_alloc(file); |
4be10c1e | 495 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
496 | if (!ctx) |
497 | return -ENOMEM; | |
498 | ||
0b2b35f6 | 499 | ctx->uid = cmd.uid; |
07d357d0 SH |
500 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
501 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
502 | if (IS_ERR(ctx->cm_id)) { |
503 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 504 | goto err1; |
a5b74540 HR |
505 | } |
506 | ||
507 | resp.id = ctx->id; | |
508 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
509 | &resp, sizeof(resp))) { | |
510 | result = -EFAULT; | |
07d357d0 | 511 | goto err2; |
a5b74540 | 512 | } |
a5b74540 | 513 | return 0; |
a5b74540 | 514 | |
07d357d0 SH |
515 | err2: |
516 | ib_destroy_cm_id(ctx->cm_id); | |
517 | err1: | |
95ed644f | 518 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 519 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 520 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 521 | kfree(ctx); |
a5b74540 HR |
522 | return result; |
523 | } | |
524 | ||
525 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
526 | const char __user *inbuf, | |
527 | int in_len, int out_len) | |
528 | { | |
529 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
530 | struct ib_ucm_destroy_id_resp resp; |
531 | struct ib_ucm_context *ctx; | |
532 | int result = 0; | |
533 | ||
534 | if (out_len < sizeof(resp)) | |
535 | return -ENOSPC; | |
a5b74540 HR |
536 | |
537 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
538 | return -EFAULT; | |
539 | ||
95ed644f | 540 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
541 | ctx = idr_find(&ctx_id_table, cmd.id); |
542 | if (!ctx) | |
543 | ctx = ERR_PTR(-ENOENT); | |
544 | else if (ctx->file != file) | |
545 | ctx = ERR_PTR(-EINVAL); | |
546 | else | |
547 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 548 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
549 | |
550 | if (IS_ERR(ctx)) | |
551 | return PTR_ERR(ctx); | |
552 | ||
1b52fa98 SH |
553 | ib_ucm_ctx_put(ctx); |
554 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
555 | |
556 | /* No new events will be generated after destroying the cm_id. */ | |
557 | ib_destroy_cm_id(ctx->cm_id); | |
558 | /* Cleanup events not yet reported to the user. */ | |
559 | ib_ucm_cleanup_events(ctx); | |
560 | ||
561 | resp.events_reported = ctx->events_reported; | |
562 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
563 | &resp, sizeof(resp))) | |
564 | result = -EFAULT; | |
565 | ||
566 | kfree(ctx); | |
567 | return result; | |
a5b74540 HR |
568 | } |
569 | ||
570 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
571 | const char __user *inbuf, | |
572 | int in_len, int out_len) | |
573 | { | |
574 | struct ib_ucm_attr_id_resp resp; | |
575 | struct ib_ucm_attr_id cmd; | |
576 | struct ib_ucm_context *ctx; | |
577 | int result = 0; | |
578 | ||
579 | if (out_len < sizeof(resp)) | |
580 | return -ENOSPC; | |
581 | ||
582 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
583 | return -EFAULT; | |
584 | ||
b9ef520f SH |
585 | ctx = ib_ucm_ctx_get(file, cmd.id); |
586 | if (IS_ERR(ctx)) | |
587 | return PTR_ERR(ctx); | |
a5b74540 HR |
588 | |
589 | resp.service_id = ctx->cm_id->service_id; | |
590 | resp.service_mask = ctx->cm_id->service_mask; | |
591 | resp.local_id = ctx->cm_id->local_id; | |
592 | resp.remote_id = ctx->cm_id->remote_id; | |
593 | ||
594 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
595 | &resp, sizeof(resp))) | |
596 | result = -EFAULT; | |
597 | ||
b9ef520f | 598 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
599 | return result; |
600 | } | |
601 | ||
0b2b35f6 SH |
602 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
603 | const char __user *inbuf, | |
604 | int in_len, int out_len) | |
605 | { | |
6a9af2e1 | 606 | struct ib_uverbs_qp_attr resp; |
0b2b35f6 SH |
607 | struct ib_ucm_init_qp_attr cmd; |
608 | struct ib_ucm_context *ctx; | |
609 | struct ib_qp_attr qp_attr; | |
610 | int result = 0; | |
611 | ||
612 | if (out_len < sizeof(resp)) | |
613 | return -ENOSPC; | |
614 | ||
615 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
616 | return -EFAULT; | |
617 | ||
618 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
619 | if (IS_ERR(ctx)) | |
620 | return PTR_ERR(ctx); | |
621 | ||
622 | resp.qp_attr_mask = 0; | |
623 | memset(&qp_attr, 0, sizeof qp_attr); | |
624 | qp_attr.qp_state = cmd.qp_state; | |
625 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
626 | if (result) | |
627 | goto out; | |
628 | ||
6a9af2e1 | 629 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
0b2b35f6 SH |
630 | |
631 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
632 | &resp, sizeof(resp))) | |
633 | result = -EFAULT; | |
634 | ||
635 | out: | |
636 | ib_ucm_ctx_put(ctx); | |
637 | return result; | |
638 | } | |
639 | ||
6e61d04f SH |
640 | static int ucm_validate_listen(__be64 service_id, __be64 service_mask) |
641 | { | |
642 | service_id &= service_mask; | |
643 | ||
644 | if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || | |
645 | ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) | |
646 | return -EINVAL; | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
a5b74540 HR |
651 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
652 | const char __user *inbuf, | |
653 | int in_len, int out_len) | |
654 | { | |
655 | struct ib_ucm_listen cmd; | |
656 | struct ib_ucm_context *ctx; | |
657 | int result; | |
658 | ||
659 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
660 | return -EFAULT; | |
661 | ||
b9ef520f SH |
662 | ctx = ib_ucm_ctx_get(file, cmd.id); |
663 | if (IS_ERR(ctx)) | |
664 | return PTR_ERR(ctx); | |
a5b74540 | 665 | |
6e61d04f SH |
666 | result = ucm_validate_listen(cmd.service_id, cmd.service_mask); |
667 | if (result) | |
668 | goto out; | |
669 | ||
670 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask, | |
671 | NULL); | |
672 | out: | |
b9ef520f | 673 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
674 | return result; |
675 | } | |
676 | ||
e1444b5a SH |
677 | static ssize_t ib_ucm_notify(struct ib_ucm_file *file, |
678 | const char __user *inbuf, | |
679 | int in_len, int out_len) | |
a5b74540 | 680 | { |
e1444b5a | 681 | struct ib_ucm_notify cmd; |
a5b74540 HR |
682 | struct ib_ucm_context *ctx; |
683 | int result; | |
684 | ||
685 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
686 | return -EFAULT; | |
687 | ||
b9ef520f SH |
688 | ctx = ib_ucm_ctx_get(file, cmd.id); |
689 | if (IS_ERR(ctx)) | |
690 | return PTR_ERR(ctx); | |
a5b74540 | 691 | |
e1444b5a | 692 | result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
b9ef520f | 693 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
694 | return result; |
695 | } | |
696 | ||
697 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
698 | { | |
699 | void *data; | |
700 | ||
701 | *dest = NULL; | |
702 | ||
703 | if (!len) | |
704 | return 0; | |
705 | ||
e642df6a JL |
706 | data = memdup_user((void __user *)(unsigned long)src, len); |
707 | if (IS_ERR(data)) | |
708 | return PTR_ERR(data); | |
a5b74540 HR |
709 | |
710 | *dest = data; | |
711 | return 0; | |
712 | } | |
713 | ||
714 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
715 | { | |
6a9af2e1 | 716 | struct ib_user_path_rec upath; |
a5b74540 HR |
717 | struct ib_sa_path_rec *sa_path; |
718 | ||
719 | *path = NULL; | |
720 | ||
721 | if (!src) | |
722 | return 0; | |
723 | ||
724 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
725 | if (!sa_path) | |
726 | return -ENOMEM; | |
727 | ||
6a9af2e1 SH |
728 | if (copy_from_user(&upath, (void __user *)(unsigned long)src, |
729 | sizeof(upath))) { | |
a5b74540 HR |
730 | |
731 | kfree(sa_path); | |
732 | return -EFAULT; | |
733 | } | |
734 | ||
6a9af2e1 | 735 | ib_copy_path_rec_from_user(sa_path, &upath); |
a5b74540 HR |
736 | *path = sa_path; |
737 | return 0; | |
738 | } | |
739 | ||
740 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
741 | const char __user *inbuf, | |
742 | int in_len, int out_len) | |
743 | { | |
744 | struct ib_cm_req_param param; | |
745 | struct ib_ucm_context *ctx; | |
746 | struct ib_ucm_req cmd; | |
747 | int result; | |
748 | ||
749 | param.private_data = NULL; | |
750 | param.primary_path = NULL; | |
751 | param.alternate_path = NULL; | |
752 | ||
753 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
754 | return -EFAULT; | |
755 | ||
756 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
757 | if (result) | |
758 | goto done; | |
759 | ||
760 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
761 | if (result) | |
762 | goto done; | |
763 | ||
764 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
765 | if (result) | |
766 | goto done; | |
767 | ||
768 | param.private_data_len = cmd.len; | |
769 | param.service_id = cmd.sid; | |
770 | param.qp_num = cmd.qpn; | |
771 | param.qp_type = cmd.qp_type; | |
772 | param.starting_psn = cmd.psn; | |
773 | param.peer_to_peer = cmd.peer_to_peer; | |
774 | param.responder_resources = cmd.responder_resources; | |
775 | param.initiator_depth = cmd.initiator_depth; | |
776 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
777 | param.flow_control = cmd.flow_control; | |
778 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
779 | param.retry_count = cmd.retry_count; | |
780 | param.rnr_retry_count = cmd.rnr_retry_count; | |
781 | param.max_cm_retries = cmd.max_cm_retries; | |
782 | param.srq = cmd.srq; | |
783 | ||
b9ef520f SH |
784 | ctx = ib_ucm_ctx_get(file, cmd.id); |
785 | if (!IS_ERR(ctx)) { | |
a5b74540 | 786 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
787 | ib_ucm_ctx_put(ctx); |
788 | } else | |
789 | result = PTR_ERR(ctx); | |
a5b74540 | 790 | |
a5b74540 | 791 | done: |
79d81907 HR |
792 | kfree(param.private_data); |
793 | kfree(param.primary_path); | |
794 | kfree(param.alternate_path); | |
a5b74540 HR |
795 | return result; |
796 | } | |
797 | ||
798 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
799 | const char __user *inbuf, | |
800 | int in_len, int out_len) | |
801 | { | |
802 | struct ib_cm_rep_param param; | |
803 | struct ib_ucm_context *ctx; | |
804 | struct ib_ucm_rep cmd; | |
805 | int result; | |
806 | ||
807 | param.private_data = NULL; | |
808 | ||
809 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
810 | return -EFAULT; | |
811 | ||
812 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
813 | if (result) | |
814 | return result; | |
815 | ||
816 | param.qp_num = cmd.qpn; | |
817 | param.starting_psn = cmd.psn; | |
818 | param.private_data_len = cmd.len; | |
819 | param.responder_resources = cmd.responder_resources; | |
820 | param.initiator_depth = cmd.initiator_depth; | |
a5b74540 HR |
821 | param.failover_accepted = cmd.failover_accepted; |
822 | param.flow_control = cmd.flow_control; | |
823 | param.rnr_retry_count = cmd.rnr_retry_count; | |
824 | param.srq = cmd.srq; | |
825 | ||
b9ef520f SH |
826 | ctx = ib_ucm_ctx_get(file, cmd.id); |
827 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 828 | ctx->uid = cmd.uid; |
a5b74540 | 829 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
830 | ib_ucm_ctx_put(ctx); |
831 | } else | |
832 | result = PTR_ERR(ctx); | |
a5b74540 | 833 | |
79d81907 | 834 | kfree(param.private_data); |
a5b74540 HR |
835 | return result; |
836 | } | |
837 | ||
838 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
839 | const char __user *inbuf, int in_len, | |
840 | int (*func)(struct ib_cm_id *cm_id, | |
841 | const void *private_data, | |
842 | u8 private_data_len)) | |
843 | { | |
844 | struct ib_ucm_private_data cmd; | |
845 | struct ib_ucm_context *ctx; | |
846 | const void *private_data = NULL; | |
847 | int result; | |
848 | ||
849 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
850 | return -EFAULT; | |
851 | ||
852 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
853 | if (result) | |
854 | return result; | |
855 | ||
b9ef520f SH |
856 | ctx = ib_ucm_ctx_get(file, cmd.id); |
857 | if (!IS_ERR(ctx)) { | |
a5b74540 | 858 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
859 | ib_ucm_ctx_put(ctx); |
860 | } else | |
861 | result = PTR_ERR(ctx); | |
a5b74540 | 862 | |
79d81907 | 863 | kfree(private_data); |
a5b74540 HR |
864 | return result; |
865 | } | |
866 | ||
867 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
868 | const char __user *inbuf, | |
869 | int in_len, int out_len) | |
870 | { | |
871 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
872 | } | |
873 | ||
874 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
875 | const char __user *inbuf, | |
876 | int in_len, int out_len) | |
877 | { | |
878 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
879 | } | |
880 | ||
881 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
882 | const char __user *inbuf, | |
883 | int in_len, int out_len) | |
884 | { | |
885 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
886 | } | |
887 | ||
888 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
889 | const char __user *inbuf, int in_len, | |
890 | int (*func)(struct ib_cm_id *cm_id, | |
891 | int status, | |
892 | const void *info, | |
893 | u8 info_len, | |
894 | const void *data, | |
895 | u8 data_len)) | |
896 | { | |
897 | struct ib_ucm_context *ctx; | |
898 | struct ib_ucm_info cmd; | |
899 | const void *data = NULL; | |
900 | const void *info = NULL; | |
901 | int result; | |
902 | ||
903 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
904 | return -EFAULT; | |
905 | ||
906 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
907 | if (result) | |
908 | goto done; | |
909 | ||
910 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
911 | if (result) | |
912 | goto done; | |
913 | ||
b9ef520f SH |
914 | ctx = ib_ucm_ctx_get(file, cmd.id); |
915 | if (!IS_ERR(ctx)) { | |
916 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 917 | data, cmd.data_len); |
b9ef520f SH |
918 | ib_ucm_ctx_put(ctx); |
919 | } else | |
920 | result = PTR_ERR(ctx); | |
a5b74540 | 921 | |
a5b74540 | 922 | done: |
79d81907 HR |
923 | kfree(data); |
924 | kfree(info); | |
a5b74540 HR |
925 | return result; |
926 | } | |
927 | ||
928 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
929 | const char __user *inbuf, | |
930 | int in_len, int out_len) | |
931 | { | |
932 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
933 | } | |
934 | ||
935 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
936 | const char __user *inbuf, | |
937 | int in_len, int out_len) | |
938 | { | |
939 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
940 | } | |
941 | ||
942 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
943 | const char __user *inbuf, | |
944 | int in_len, int out_len) | |
945 | { | |
946 | struct ib_ucm_context *ctx; | |
947 | struct ib_ucm_mra cmd; | |
948 | const void *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(&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)) { | |
960 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
961 | ib_ucm_ctx_put(ctx); | |
962 | } else | |
963 | result = PTR_ERR(ctx); | |
a5b74540 | 964 | |
79d81907 | 965 | kfree(data); |
a5b74540 HR |
966 | return result; |
967 | } | |
968 | ||
969 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
970 | const char __user *inbuf, | |
971 | int in_len, int out_len) | |
972 | { | |
973 | struct ib_ucm_context *ctx; | |
974 | struct ib_sa_path_rec *path = NULL; | |
975 | struct ib_ucm_lap cmd; | |
976 | const void *data = NULL; | |
977 | int result; | |
978 | ||
979 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
980 | return -EFAULT; | |
981 | ||
982 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
983 | if (result) | |
984 | goto done; | |
985 | ||
986 | result = ib_ucm_path_get(&path, cmd.path); | |
987 | if (result) | |
988 | goto done; | |
989 | ||
b9ef520f SH |
990 | ctx = ib_ucm_ctx_get(file, cmd.id); |
991 | if (!IS_ERR(ctx)) { | |
a5b74540 | 992 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
993 | ib_ucm_ctx_put(ctx); |
994 | } else | |
995 | result = PTR_ERR(ctx); | |
a5b74540 | 996 | |
a5b74540 | 997 | done: |
79d81907 HR |
998 | kfree(data); |
999 | kfree(path); | |
a5b74540 HR |
1000 | return result; |
1001 | } | |
1002 | ||
1003 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1004 | const char __user *inbuf, | |
1005 | int in_len, int out_len) | |
1006 | { | |
1007 | struct ib_cm_sidr_req_param param; | |
1008 | struct ib_ucm_context *ctx; | |
1009 | struct ib_ucm_sidr_req cmd; | |
1010 | int result; | |
1011 | ||
1012 | param.private_data = NULL; | |
1013 | param.path = NULL; | |
1014 | ||
1015 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1016 | return -EFAULT; | |
1017 | ||
1018 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1019 | if (result) | |
1020 | goto done; | |
1021 | ||
1022 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1023 | if (result) | |
1024 | goto done; | |
1025 | ||
1026 | param.private_data_len = cmd.len; | |
1027 | param.service_id = cmd.sid; | |
1028 | param.timeout_ms = cmd.timeout; | |
1029 | param.max_cm_retries = cmd.max_cm_retries; | |
a5b74540 | 1030 | |
b9ef520f SH |
1031 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1032 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1033 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1034 | ib_ucm_ctx_put(ctx); |
1035 | } else | |
1036 | result = PTR_ERR(ctx); | |
a5b74540 | 1037 | |
a5b74540 | 1038 | done: |
79d81907 HR |
1039 | kfree(param.private_data); |
1040 | kfree(param.path); | |
a5b74540 HR |
1041 | return result; |
1042 | } | |
1043 | ||
1044 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1045 | const char __user *inbuf, | |
1046 | int in_len, int out_len) | |
1047 | { | |
1048 | struct ib_cm_sidr_rep_param param; | |
1049 | struct ib_ucm_sidr_rep cmd; | |
1050 | struct ib_ucm_context *ctx; | |
1051 | int result; | |
1052 | ||
1053 | param.info = NULL; | |
1054 | ||
1055 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1056 | return -EFAULT; | |
1057 | ||
1058 | result = ib_ucm_alloc_data(¶m.private_data, | |
1059 | cmd.data, cmd.data_len); | |
1060 | if (result) | |
1061 | goto done; | |
1062 | ||
1063 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1064 | if (result) | |
1065 | goto done; | |
1066 | ||
b9ef520f SH |
1067 | param.qp_num = cmd.qpn; |
1068 | param.qkey = cmd.qkey; | |
1069 | param.status = cmd.status; | |
1070 | param.info_length = cmd.info_len; | |
1071 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1072 | |
b9ef520f SH |
1073 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1074 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1075 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1076 | ib_ucm_ctx_put(ctx); |
1077 | } else | |
1078 | result = PTR_ERR(ctx); | |
a5b74540 | 1079 | |
a5b74540 | 1080 | done: |
79d81907 HR |
1081 | kfree(param.private_data); |
1082 | kfree(param.info); | |
a5b74540 HR |
1083 | return result; |
1084 | } | |
1085 | ||
1086 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1087 | const char __user *inbuf, | |
1088 | int in_len, int out_len) = { | |
1089 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1090 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1091 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1092 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
e1444b5a | 1093 | [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, |
a5b74540 HR |
1094 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, |
1095 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1096 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1097 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1098 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1099 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1100 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1101 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1102 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1103 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1104 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1105 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1106 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1107 | }; |
1108 | ||
1109 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1110 | size_t len, loff_t *pos) | |
1111 | { | |
1112 | struct ib_ucm_file *file = filp->private_data; | |
1113 | struct ib_ucm_cmd_hdr hdr; | |
1114 | ssize_t result; | |
1115 | ||
1116 | if (len < sizeof(hdr)) | |
1117 | return -EINVAL; | |
1118 | ||
1119 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1120 | return -EFAULT; | |
1121 | ||
caf6e3f2 | 1122 | if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
a5b74540 HR |
1123 | return -EINVAL; |
1124 | ||
1125 | if (hdr.in + sizeof(hdr) > len) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1129 | hdr.in, hdr.out); | |
1130 | if (!result) | |
1131 | result = len; | |
1132 | ||
1133 | return result; | |
1134 | } | |
1135 | ||
1136 | static unsigned int ib_ucm_poll(struct file *filp, | |
1137 | struct poll_table_struct *wait) | |
1138 | { | |
1139 | struct ib_ucm_file *file = filp->private_data; | |
1140 | unsigned int mask = 0; | |
1141 | ||
1142 | poll_wait(filp, &file->poll_wait, wait); | |
1143 | ||
1144 | if (!list_empty(&file->events)) | |
1145 | mask = POLLIN | POLLRDNORM; | |
1146 | ||
1147 | return mask; | |
1148 | } | |
1149 | ||
5ba18b18 RD |
1150 | /* |
1151 | * ib_ucm_open() does not need the BKL: | |
1152 | * | |
1153 | * - no global state is referred to; | |
1154 | * - there is no ioctl method to race against; | |
1155 | * - no further module initialization is required for open to work | |
1156 | * after the device is registered. | |
1157 | */ | |
a5b74540 HR |
1158 | static int ib_ucm_open(struct inode *inode, struct file *filp) |
1159 | { | |
1160 | struct ib_ucm_file *file; | |
1161 | ||
1162 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1163 | if (!file) | |
1164 | return -ENOMEM; | |
1165 | ||
1166 | INIT_LIST_HEAD(&file->events); | |
1167 | INIT_LIST_HEAD(&file->ctxs); | |
1168 | init_waitqueue_head(&file->poll_wait); | |
1169 | ||
4be10c1e | 1170 | mutex_init(&file->file_mutex); |
a5b74540 HR |
1171 | |
1172 | filp->private_data = file; | |
1173 | file->filp = filp; | |
f4e91eb4 | 1174 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); |
a5b74540 | 1175 | |
bc1db9af | 1176 | return nonseekable_open(inode, filp); |
a5b74540 HR |
1177 | } |
1178 | ||
1179 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1180 | { | |
1181 | struct ib_ucm_file *file = filp->private_data; | |
1182 | struct ib_ucm_context *ctx; | |
1183 | ||
4be10c1e | 1184 | mutex_lock(&file->file_mutex); |
a5b74540 | 1185 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1186 | ctx = list_entry(file->ctxs.next, |
1187 | struct ib_ucm_context, file_list); | |
4be10c1e | 1188 | mutex_unlock(&file->file_mutex); |
0b2b35f6 | 1189 | |
95ed644f | 1190 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1191 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1192 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1193 | |
1194 | ib_destroy_cm_id(ctx->cm_id); | |
1195 | ib_ucm_cleanup_events(ctx); | |
1196 | kfree(ctx); | |
1197 | ||
4be10c1e | 1198 | mutex_lock(&file->file_mutex); |
a5b74540 | 1199 | } |
4be10c1e | 1200 | mutex_unlock(&file->file_mutex); |
a5b74540 | 1201 | kfree(file); |
a5b74540 HR |
1202 | return 0; |
1203 | } | |
1204 | ||
f4e91eb4 | 1205 | static void ib_ucm_release_dev(struct device *dev) |
07d357d0 | 1206 | { |
f4e91eb4 | 1207 | struct ib_ucm_device *ucm_dev; |
07d357d0 | 1208 | |
f4e91eb4 TJ |
1209 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1210 | cdev_del(&ucm_dev->cdev); | |
daa91358 AC |
1211 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1212 | clear_bit(ucm_dev->devnum, dev_map); | |
1213 | else | |
1214 | clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, dev_map); | |
f4e91eb4 | 1215 | kfree(ucm_dev); |
07d357d0 SH |
1216 | } |
1217 | ||
2b8693c0 | 1218 | static const struct file_operations ucm_fops = { |
cdb8e438 AC |
1219 | .owner = THIS_MODULE, |
1220 | .open = ib_ucm_open, | |
a5b74540 | 1221 | .release = ib_ucm_close, |
cdb8e438 | 1222 | .write = ib_ucm_write, |
a5b74540 | 1223 | .poll = ib_ucm_poll, |
bc1db9af | 1224 | .llseek = no_llseek, |
a5b74540 HR |
1225 | }; |
1226 | ||
f4e91eb4 TJ |
1227 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1228 | char *buf) | |
07d357d0 | 1229 | { |
f4e91eb4 | 1230 | struct ib_ucm_device *ucm_dev; |
3cd96564 | 1231 | |
f4e91eb4 TJ |
1232 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1233 | return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); | |
07d357d0 | 1234 | } |
f4e91eb4 | 1235 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
a5b74540 | 1236 | |
daa91358 AC |
1237 | static dev_t overflow_maj; |
1238 | static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); | |
1239 | static int find_overflow_devnum(void) | |
1240 | { | |
1241 | int ret; | |
1242 | ||
1243 | if (!overflow_maj) { | |
1244 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, | |
1245 | "infiniband_cm"); | |
1246 | if (ret) { | |
1247 | printk(KERN_ERR "ucm: couldn't register dynamic device number\n"); | |
1248 | return ret; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); | |
1253 | if (ret >= IB_UCM_MAX_DEVICES) | |
1254 | return -1; | |
1255 | ||
1256 | return ret; | |
1257 | } | |
1258 | ||
07d357d0 | 1259 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1260 | { |
dd08f702 | 1261 | int devnum; |
31d14b6e | 1262 | dev_t base; |
07d357d0 | 1263 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1264 | |
07ebafba TT |
1265 | if (!device->alloc_ucontext || |
1266 | rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) | |
07d357d0 SH |
1267 | return; |
1268 | ||
de6eb66b | 1269 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1270 | if (!ucm_dev) |
1271 | return; | |
a5b74540 | 1272 | |
07d357d0 | 1273 | ucm_dev->ib_dev = device; |
a5b74540 | 1274 | |
dd08f702 | 1275 | devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1276 | if (devnum >= IB_UCM_MAX_DEVICES) { |
1277 | devnum = find_overflow_devnum(); | |
1278 | if (devnum < 0) | |
1279 | goto err; | |
1280 | ||
1281 | ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; | |
1282 | base = devnum + overflow_maj; | |
1283 | set_bit(devnum, overflow_map); | |
1284 | } else { | |
1285 | ucm_dev->devnum = devnum; | |
1286 | base = devnum + IB_UCM_BASE_DEV; | |
1287 | set_bit(devnum, dev_map); | |
1288 | } | |
07d357d0 | 1289 | |
f4e91eb4 TJ |
1290 | cdev_init(&ucm_dev->cdev, &ucm_fops); |
1291 | ucm_dev->cdev.owner = THIS_MODULE; | |
1292 | kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); | |
31d14b6e | 1293 | if (cdev_add(&ucm_dev->cdev, base, 1)) |
07d357d0 SH |
1294 | goto err; |
1295 | ||
f4e91eb4 TJ |
1296 | ucm_dev->dev.class = &cm_class; |
1297 | ucm_dev->dev.parent = device->dma_device; | |
1298 | ucm_dev->dev.devt = ucm_dev->cdev.dev; | |
1299 | ucm_dev->dev.release = ib_ucm_release_dev; | |
d927e38c | 1300 | dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); |
f4e91eb4 | 1301 | if (device_register(&ucm_dev->dev)) |
a5b74540 | 1302 | goto err_cdev; |
a5b74540 | 1303 | |
f4e91eb4 TJ |
1304 | if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) |
1305 | goto err_dev; | |
07d357d0 SH |
1306 | |
1307 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1308 | return; | |
1309 | ||
f4e91eb4 TJ |
1310 | err_dev: |
1311 | device_unregister(&ucm_dev->dev); | |
07d357d0 | 1312 | err_cdev: |
f4e91eb4 | 1313 | cdev_del(&ucm_dev->cdev); |
daa91358 AC |
1314 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1315 | clear_bit(devnum, dev_map); | |
1316 | else | |
1317 | clear_bit(devnum, overflow_map); | |
07d357d0 SH |
1318 | err: |
1319 | kfree(ucm_dev); | |
1320 | return; | |
1321 | } | |
1322 | ||
1323 | static void ib_ucm_remove_one(struct ib_device *device) | |
1324 | { | |
1325 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1326 | ||
1327 | if (!ucm_dev) | |
1328 | return; | |
1329 | ||
f4e91eb4 | 1330 | device_unregister(&ucm_dev->dev); |
07d357d0 SH |
1331 | } |
1332 | ||
0933e2d9 AK |
1333 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1334 | __stringify(IB_USER_CM_ABI_VERSION)); | |
07d357d0 SH |
1335 | |
1336 | static int __init ib_ucm_init(void) | |
1337 | { | |
1338 | int ret; | |
1339 | ||
1340 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1341 | "infiniband_cm"); | |
1342 | if (ret) { | |
1343 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
9af57b7a | 1344 | goto error1; |
a5b74540 HR |
1345 | } |
1346 | ||
0933e2d9 | 1347 | ret = class_create_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 SH |
1348 | if (ret) { |
1349 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
9af57b7a | 1350 | goto error2; |
07d357d0 | 1351 | } |
a5b74540 | 1352 | |
07d357d0 SH |
1353 | ret = ib_register_client(&ucm_client); |
1354 | if (ret) { | |
1355 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
9af57b7a | 1356 | goto error3; |
07d357d0 | 1357 | } |
a5b74540 | 1358 | return 0; |
07d357d0 | 1359 | |
9af57b7a | 1360 | error3: |
0933e2d9 | 1361 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
9af57b7a | 1362 | error2: |
07d357d0 | 1363 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
9af57b7a | 1364 | error1: |
07d357d0 | 1365 | return ret; |
a5b74540 HR |
1366 | } |
1367 | ||
1368 | static void __exit ib_ucm_cleanup(void) | |
1369 | { | |
07d357d0 | 1370 | ib_unregister_client(&ucm_client); |
0933e2d9 | 1371 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1372 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1373 | if (overflow_maj) |
1374 | unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1375 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1376 | } |
1377 | ||
1378 | module_init(ib_ucm_init); | |
1379 | module_exit(ib_ucm_cleanup); |