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 | ||
e6bd18f5 | 51 | #include <rdma/ib.h> |
595e726a SH |
52 | #include <rdma/ib_cm.h> |
53 | #include <rdma/ib_user_cm.h> | |
6a9af2e1 | 54 | #include <rdma/ib_marshall.h> |
a5b74540 HR |
55 | |
56 | MODULE_AUTHOR("Libor Michalek"); | |
57 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
58 | MODULE_LICENSE("Dual BSD/GPL"); | |
59 | ||
07d357d0 SH |
60 | struct ib_ucm_device { |
61 | int devnum; | |
f4e91eb4 TJ |
62 | struct cdev cdev; |
63 | struct device dev; | |
07d357d0 SH |
64 | struct ib_device *ib_dev; |
65 | }; | |
66 | ||
595e726a | 67 | struct ib_ucm_file { |
4be10c1e | 68 | struct mutex file_mutex; |
595e726a | 69 | struct file *filp; |
07d357d0 | 70 | struct ib_ucm_device *device; |
79d81907 | 71 | |
07d357d0 SH |
72 | struct list_head ctxs; |
73 | struct list_head events; | |
595e726a SH |
74 | wait_queue_head_t poll_wait; |
75 | }; | |
76 | ||
77 | struct ib_ucm_context { | |
78 | int id; | |
1b52fa98 | 79 | struct completion comp; |
595e726a SH |
80 | atomic_t ref; |
81 | int events_reported; | |
82 | ||
83 | struct ib_ucm_file *file; | |
84 | struct ib_cm_id *cm_id; | |
85 | __u64 uid; | |
86 | ||
87 | struct list_head events; /* list of pending events. */ | |
88 | struct list_head file_list; /* member in file ctx list */ | |
89 | }; | |
90 | ||
91 | struct ib_ucm_event { | |
92 | struct ib_ucm_context *ctx; | |
93 | struct list_head file_list; /* member in file event list */ | |
94 | struct list_head ctx_list; /* member in ctx event list */ | |
95 | ||
96 | struct ib_cm_id *cm_id; | |
97 | struct ib_ucm_event_resp resp; | |
98 | void *data; | |
99 | void *info; | |
100 | int data_len; | |
101 | int info_len; | |
102 | }; | |
79d81907 | 103 | |
a5b74540 HR |
104 | enum { |
105 | IB_UCM_MAJOR = 231, | |
07d357d0 SH |
106 | IB_UCM_BASE_MINOR = 224, |
107 | IB_UCM_MAX_DEVICES = 32 | |
a5b74540 HR |
108 | }; |
109 | ||
07d357d0 | 110 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 111 | |
07d357d0 | 112 | static void ib_ucm_add_one(struct ib_device *device); |
7c1eb45a | 113 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data); |
a5b74540 | 114 | |
07d357d0 SH |
115 | static struct ib_client ucm_client = { |
116 | .name = "ucm", | |
117 | .add = ib_ucm_add_one, | |
118 | .remove = ib_ucm_remove_one | |
119 | }; | |
120 | ||
95ed644f | 121 | static DEFINE_MUTEX(ctx_id_mutex); |
762a03e2 | 122 | static DEFINE_IDR(ctx_id_table); |
07d357d0 | 123 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 124 | |
b9ef520f | 125 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
126 | { |
127 | struct ib_ucm_context *ctx; | |
128 | ||
95ed644f | 129 | mutex_lock(&ctx_id_mutex); |
a5b74540 | 130 | ctx = idr_find(&ctx_id_table, id); |
b9ef520f SH |
131 | if (!ctx) |
132 | ctx = ERR_PTR(-ENOENT); | |
133 | else if (ctx->file != file) | |
134 | ctx = ERR_PTR(-EINVAL); | |
135 | else | |
136 | atomic_inc(&ctx->ref); | |
95ed644f | 137 | mutex_unlock(&ctx_id_mutex); |
a5b74540 HR |
138 | |
139 | return ctx; | |
140 | } | |
141 | ||
142 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
143 | { | |
b9ef520f | 144 | if (atomic_dec_and_test(&ctx->ref)) |
1b52fa98 | 145 | complete(&ctx->comp); |
b9ef520f SH |
146 | } |
147 | ||
0b2b35f6 | 148 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 149 | { |
0b2b35f6 SH |
150 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
151 | } | |
b9ef520f | 152 | |
0b2b35f6 SH |
153 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
154 | { | |
155 | struct ib_ucm_event *uevent; | |
a5b74540 | 156 | |
4be10c1e | 157 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
158 | list_del(&ctx->file_list); |
159 | while (!list_empty(&ctx->events)) { | |
160 | ||
161 | uevent = list_entry(ctx->events.next, | |
162 | struct ib_ucm_event, ctx_list); | |
163 | list_del(&uevent->file_list); | |
164 | list_del(&uevent->ctx_list); | |
f469b262 | 165 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
166 | |
167 | /* clear incoming connections. */ | |
0b2b35f6 | 168 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
169 | ib_destroy_cm_id(uevent->cm_id); |
170 | ||
171 | kfree(uevent); | |
f469b262 | 172 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 | 173 | } |
4be10c1e | 174 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
175 | } |
176 | ||
177 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
178 | { | |
179 | struct ib_ucm_context *ctx; | |
a5b74540 | 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 | |
3b069c5d TH |
190 | mutex_lock(&ctx_id_mutex); |
191 | ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); | |
192 | mutex_unlock(&ctx_id_mutex); | |
193 | if (ctx->id < 0) | |
a5b74540 HR |
194 | goto error; |
195 | ||
0b2b35f6 | 196 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 197 | return ctx; |
0b2b35f6 | 198 | |
a5b74540 | 199 | error: |
a5b74540 | 200 | kfree(ctx); |
a5b74540 HR |
201 | return NULL; |
202 | } | |
07d357d0 | 203 | |
0b2b35f6 | 204 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
205 | struct ib_cm_req_event_param *kreq) |
206 | { | |
a5b74540 HR |
207 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
208 | ureq->remote_qkey = kreq->remote_qkey; | |
209 | ureq->remote_qpn = kreq->remote_qpn; | |
210 | ureq->qp_type = kreq->qp_type; | |
211 | ureq->starting_psn = kreq->starting_psn; | |
212 | ureq->responder_resources = kreq->responder_resources; | |
213 | ureq->initiator_depth = kreq->initiator_depth; | |
214 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
215 | ureq->flow_control = kreq->flow_control; | |
216 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
217 | ureq->retry_count = kreq->retry_count; | |
218 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
219 | ureq->srq = kreq->srq; | |
07d357d0 | 220 | ureq->port = kreq->port; |
a5b74540 | 221 | |
6a9af2e1 SH |
222 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
223 | if (kreq->alternate_path) | |
224 | ib_copy_path_rec_to_user(&ureq->alternate_path, | |
225 | kreq->alternate_path); | |
a5b74540 HR |
226 | } |
227 | ||
228 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
229 | struct ib_cm_rep_event_param *krep) | |
230 | { | |
231 | urep->remote_ca_guid = krep->remote_ca_guid; | |
232 | urep->remote_qkey = krep->remote_qkey; | |
233 | urep->remote_qpn = krep->remote_qpn; | |
234 | urep->starting_psn = krep->starting_psn; | |
235 | urep->responder_resources = krep->responder_resources; | |
236 | urep->initiator_depth = krep->initiator_depth; | |
237 | urep->target_ack_delay = krep->target_ack_delay; | |
238 | urep->failover_accepted = krep->failover_accepted; | |
239 | urep->flow_control = krep->flow_control; | |
240 | urep->rnr_retry_count = krep->rnr_retry_count; | |
241 | urep->srq = krep->srq; | |
242 | } | |
243 | ||
a5b74540 HR |
244 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
245 | struct ib_cm_sidr_rep_event_param *krep) | |
246 | { | |
247 | urep->status = krep->status; | |
248 | urep->qkey = krep->qkey; | |
249 | urep->qpn = krep->qpn; | |
250 | }; | |
251 | ||
0b2b35f6 | 252 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
253 | struct ib_ucm_event *uvt) |
254 | { | |
255 | void *info = NULL; | |
a5b74540 HR |
256 | |
257 | switch (evt->event) { | |
258 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 259 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
260 | &evt->param.req_rcvd); |
261 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 262 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
263 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
264 | IB_UCM_PRES_ALTERNATE : 0); | |
265 | break; | |
266 | case IB_CM_REP_RECEIVED: | |
267 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
268 | &evt->param.rep_rcvd); | |
269 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
270 | break; |
271 | case IB_CM_RTU_RECEIVED: | |
272 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
273 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
274 | break; |
275 | case IB_CM_DREQ_RECEIVED: | |
276 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
277 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
278 | break; |
279 | case IB_CM_DREP_RECEIVED: | |
280 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
281 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
282 | break; |
283 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
284 | uvt->resp.u.mra_resp.timeout = |
285 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 286 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
287 | break; |
288 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 289 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
290 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
291 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
292 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
293 | break; |
294 | case IB_CM_LAP_RECEIVED: | |
6a9af2e1 SH |
295 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
296 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 297 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 298 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
299 | break; |
300 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 301 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
302 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
303 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
304 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
305 | break; |
306 | case IB_CM_SIDR_REQ_RECEIVED: | |
3cd96564 | 307 | uvt->resp.u.sidr_req_resp.pkey = |
0b2b35f6 | 308 | evt->param.sidr_req_rcvd.pkey; |
3cd96564 | 309 | uvt->resp.u.sidr_req_resp.port = |
07d357d0 | 310 | evt->param.sidr_req_rcvd.port; |
a5b74540 | 311 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
312 | break; |
313 | case IB_CM_SIDR_REP_RECEIVED: | |
314 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
315 | &evt->param.sidr_rep_rcvd); | |
316 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
317 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
318 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
319 | break; |
320 | default: | |
321 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
322 | break; |
323 | } | |
324 | ||
b9ef520f | 325 | if (uvt->data_len) { |
bed8bdfd | 326 | uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
327 | if (!uvt->data) |
328 | goto err1; | |
a5b74540 | 329 | |
a5b74540 HR |
330 | uvt->resp.present |= IB_UCM_PRES_DATA; |
331 | } | |
332 | ||
b9ef520f | 333 | if (uvt->info_len) { |
bed8bdfd | 334 | uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
335 | if (!uvt->info) |
336 | goto err2; | |
a5b74540 | 337 | |
a5b74540 HR |
338 | uvt->resp.present |= IB_UCM_PRES_INFO; |
339 | } | |
a5b74540 | 340 | return 0; |
b9ef520f SH |
341 | |
342 | err2: | |
79d81907 | 343 | kfree(uvt->data); |
b9ef520f SH |
344 | err1: |
345 | return -ENOMEM; | |
a5b74540 HR |
346 | } |
347 | ||
348 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
349 | struct ib_cm_event *event) | |
350 | { | |
351 | struct ib_ucm_event *uevent; | |
352 | struct ib_ucm_context *ctx; | |
353 | int result = 0; | |
a5b74540 | 354 | |
b9ef520f | 355 | ctx = cm_id->context; |
a5b74540 | 356 | |
de6eb66b | 357 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
358 | if (!uevent) |
359 | goto err1; | |
a5b74540 | 360 | |
0b2b35f6 SH |
361 | uevent->ctx = ctx; |
362 | uevent->cm_id = cm_id; | |
363 | uevent->resp.uid = ctx->uid; | |
364 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
365 | uevent->resp.event = event->event; |
366 | ||
0b2b35f6 | 367 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 368 | if (result) |
b9ef520f | 369 | goto err2; |
a5b74540 | 370 | |
4be10c1e | 371 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
372 | list_add_tail(&uevent->file_list, &ctx->file->events); |
373 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 374 | wake_up_interruptible(&ctx->file->poll_wait); |
4be10c1e | 375 | mutex_unlock(&ctx->file->file_mutex); |
b9ef520f SH |
376 | return 0; |
377 | ||
378 | err2: | |
379 | kfree(uevent); | |
380 | err1: | |
381 | /* Destroy new cm_id's */ | |
0b2b35f6 | 382 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
383 | } |
384 | ||
385 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
386 | const char __user *inbuf, | |
387 | int in_len, int out_len) | |
388 | { | |
389 | struct ib_ucm_context *ctx; | |
390 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 391 | struct ib_ucm_event *uevent; |
a5b74540 | 392 | int result = 0; |
a5b74540 HR |
393 | |
394 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
395 | return -ENOSPC; | |
396 | ||
397 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
398 | return -EFAULT; | |
07d357d0 | 399 | |
4be10c1e | 400 | mutex_lock(&file->file_mutex); |
a5b74540 | 401 | while (list_empty(&file->events)) { |
9d41b7fd | 402 | mutex_unlock(&file->file_mutex); |
a5b74540 | 403 | |
9d41b7fd SH |
404 | if (file->filp->f_flags & O_NONBLOCK) |
405 | return -EAGAIN; | |
a5b74540 | 406 | |
9d41b7fd SH |
407 | if (wait_event_interruptible(file->poll_wait, |
408 | !list_empty(&file->events))) | |
409 | return -ERESTARTSYS; | |
a5b74540 | 410 | |
4be10c1e | 411 | mutex_lock(&file->file_mutex); |
a5b74540 HR |
412 | } |
413 | ||
a5b74540 HR |
414 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); |
415 | ||
0b2b35f6 SH |
416 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
417 | ctx = ib_ucm_ctx_alloc(file); | |
418 | if (!ctx) { | |
419 | result = -ENOMEM; | |
420 | goto done; | |
421 | } | |
a5b74540 | 422 | |
0b2b35f6 SH |
423 | ctx->cm_id = uevent->cm_id; |
424 | ctx->cm_id->context = ctx; | |
425 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
426 | } |
427 | ||
a5b74540 HR |
428 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
429 | &uevent->resp, sizeof(uevent->resp))) { | |
430 | result = -EFAULT; | |
431 | goto done; | |
432 | } | |
433 | ||
434 | if (uevent->data) { | |
a5b74540 HR |
435 | if (cmd.data_len < uevent->data_len) { |
436 | result = -ENOMEM; | |
437 | goto done; | |
438 | } | |
a5b74540 HR |
439 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
440 | uevent->data, uevent->data_len)) { | |
441 | result = -EFAULT; | |
442 | goto done; | |
443 | } | |
444 | } | |
445 | ||
446 | if (uevent->info) { | |
a5b74540 HR |
447 | if (cmd.info_len < uevent->info_len) { |
448 | result = -ENOMEM; | |
449 | goto done; | |
450 | } | |
a5b74540 HR |
451 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
452 | uevent->info, uevent->info_len)) { | |
453 | result = -EFAULT; | |
454 | goto done; | |
455 | } | |
456 | } | |
457 | ||
458 | list_del(&uevent->file_list); | |
459 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 460 | uevent->ctx->events_reported++; |
a5b74540 | 461 | |
79d81907 HR |
462 | kfree(uevent->data); |
463 | kfree(uevent->info); | |
a5b74540 HR |
464 | kfree(uevent); |
465 | done: | |
4be10c1e | 466 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
467 | return result; |
468 | } | |
469 | ||
a5b74540 HR |
470 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
471 | const char __user *inbuf, | |
472 | int in_len, int out_len) | |
473 | { | |
474 | struct ib_ucm_create_id cmd; | |
475 | struct ib_ucm_create_id_resp resp; | |
476 | struct ib_ucm_context *ctx; | |
477 | int result; | |
478 | ||
479 | if (out_len < sizeof(resp)) | |
480 | return -ENOSPC; | |
481 | ||
482 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
483 | return -EFAULT; | |
484 | ||
4be10c1e | 485 | mutex_lock(&file->file_mutex); |
a5b74540 | 486 | ctx = ib_ucm_ctx_alloc(file); |
4be10c1e | 487 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
488 | if (!ctx) |
489 | return -ENOMEM; | |
490 | ||
0b2b35f6 | 491 | ctx->uid = cmd.uid; |
07d357d0 SH |
492 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
493 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
494 | if (IS_ERR(ctx->cm_id)) { |
495 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 496 | goto err1; |
a5b74540 HR |
497 | } |
498 | ||
499 | resp.id = ctx->id; | |
500 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
501 | &resp, sizeof(resp))) { | |
502 | result = -EFAULT; | |
07d357d0 | 503 | goto err2; |
a5b74540 | 504 | } |
a5b74540 | 505 | return 0; |
a5b74540 | 506 | |
07d357d0 SH |
507 | err2: |
508 | ib_destroy_cm_id(ctx->cm_id); | |
509 | err1: | |
95ed644f | 510 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 511 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 512 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 513 | kfree(ctx); |
a5b74540 HR |
514 | return result; |
515 | } | |
516 | ||
517 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
518 | const char __user *inbuf, | |
519 | int in_len, int out_len) | |
520 | { | |
521 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
522 | struct ib_ucm_destroy_id_resp resp; |
523 | struct ib_ucm_context *ctx; | |
524 | int result = 0; | |
525 | ||
526 | if (out_len < sizeof(resp)) | |
527 | return -ENOSPC; | |
a5b74540 HR |
528 | |
529 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
530 | return -EFAULT; | |
531 | ||
95ed644f | 532 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
533 | ctx = idr_find(&ctx_id_table, cmd.id); |
534 | if (!ctx) | |
535 | ctx = ERR_PTR(-ENOENT); | |
536 | else if (ctx->file != file) | |
537 | ctx = ERR_PTR(-EINVAL); | |
538 | else | |
539 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 540 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
541 | |
542 | if (IS_ERR(ctx)) | |
543 | return PTR_ERR(ctx); | |
544 | ||
1b52fa98 SH |
545 | ib_ucm_ctx_put(ctx); |
546 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
547 | |
548 | /* No new events will be generated after destroying the cm_id. */ | |
549 | ib_destroy_cm_id(ctx->cm_id); | |
550 | /* Cleanup events not yet reported to the user. */ | |
551 | ib_ucm_cleanup_events(ctx); | |
552 | ||
553 | resp.events_reported = ctx->events_reported; | |
554 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
555 | &resp, sizeof(resp))) | |
556 | result = -EFAULT; | |
557 | ||
558 | kfree(ctx); | |
559 | return result; | |
a5b74540 HR |
560 | } |
561 | ||
562 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
563 | const char __user *inbuf, | |
564 | int in_len, int out_len) | |
565 | { | |
566 | struct ib_ucm_attr_id_resp resp; | |
567 | struct ib_ucm_attr_id cmd; | |
568 | struct ib_ucm_context *ctx; | |
569 | int result = 0; | |
570 | ||
571 | if (out_len < sizeof(resp)) | |
572 | return -ENOSPC; | |
573 | ||
574 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
575 | return -EFAULT; | |
576 | ||
b9ef520f SH |
577 | ctx = ib_ucm_ctx_get(file, cmd.id); |
578 | if (IS_ERR(ctx)) | |
579 | return PTR_ERR(ctx); | |
a5b74540 HR |
580 | |
581 | resp.service_id = ctx->cm_id->service_id; | |
582 | resp.service_mask = ctx->cm_id->service_mask; | |
583 | resp.local_id = ctx->cm_id->local_id; | |
584 | resp.remote_id = ctx->cm_id->remote_id; | |
585 | ||
586 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
587 | &resp, sizeof(resp))) | |
588 | result = -EFAULT; | |
589 | ||
b9ef520f | 590 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
591 | return result; |
592 | } | |
593 | ||
0b2b35f6 SH |
594 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
595 | const char __user *inbuf, | |
596 | int in_len, int out_len) | |
597 | { | |
6a9af2e1 | 598 | struct ib_uverbs_qp_attr resp; |
0b2b35f6 SH |
599 | struct ib_ucm_init_qp_attr cmd; |
600 | struct ib_ucm_context *ctx; | |
601 | struct ib_qp_attr qp_attr; | |
602 | int result = 0; | |
603 | ||
604 | if (out_len < sizeof(resp)) | |
605 | return -ENOSPC; | |
606 | ||
607 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
608 | return -EFAULT; | |
609 | ||
610 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
611 | if (IS_ERR(ctx)) | |
612 | return PTR_ERR(ctx); | |
613 | ||
614 | resp.qp_attr_mask = 0; | |
615 | memset(&qp_attr, 0, sizeof qp_attr); | |
616 | qp_attr.qp_state = cmd.qp_state; | |
617 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
618 | if (result) | |
619 | goto out; | |
620 | ||
6a9af2e1 | 621 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
0b2b35f6 SH |
622 | |
623 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
624 | &resp, sizeof(resp))) | |
625 | result = -EFAULT; | |
626 | ||
627 | out: | |
628 | ib_ucm_ctx_put(ctx); | |
629 | return result; | |
630 | } | |
631 | ||
6e61d04f SH |
632 | static int ucm_validate_listen(__be64 service_id, __be64 service_mask) |
633 | { | |
634 | service_id &= service_mask; | |
635 | ||
636 | if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || | |
637 | ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) | |
638 | return -EINVAL; | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
a5b74540 HR |
643 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
644 | const char __user *inbuf, | |
645 | int in_len, int out_len) | |
646 | { | |
647 | struct ib_ucm_listen cmd; | |
648 | struct ib_ucm_context *ctx; | |
649 | int result; | |
650 | ||
651 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
652 | return -EFAULT; | |
653 | ||
b9ef520f SH |
654 | ctx = ib_ucm_ctx_get(file, cmd.id); |
655 | if (IS_ERR(ctx)) | |
656 | return PTR_ERR(ctx); | |
a5b74540 | 657 | |
6e61d04f SH |
658 | result = ucm_validate_listen(cmd.service_id, cmd.service_mask); |
659 | if (result) | |
660 | goto out; | |
661 | ||
73fec7fd | 662 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
6e61d04f | 663 | out: |
b9ef520f | 664 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
665 | return result; |
666 | } | |
667 | ||
e1444b5a SH |
668 | static ssize_t ib_ucm_notify(struct ib_ucm_file *file, |
669 | const char __user *inbuf, | |
670 | int in_len, int out_len) | |
a5b74540 | 671 | { |
e1444b5a | 672 | struct ib_ucm_notify cmd; |
a5b74540 HR |
673 | struct ib_ucm_context *ctx; |
674 | int result; | |
675 | ||
676 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
677 | return -EFAULT; | |
678 | ||
b9ef520f SH |
679 | ctx = ib_ucm_ctx_get(file, cmd.id); |
680 | if (IS_ERR(ctx)) | |
681 | return PTR_ERR(ctx); | |
a5b74540 | 682 | |
e1444b5a | 683 | result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
b9ef520f | 684 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
685 | return result; |
686 | } | |
687 | ||
688 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
689 | { | |
690 | void *data; | |
691 | ||
692 | *dest = NULL; | |
693 | ||
694 | if (!len) | |
695 | return 0; | |
696 | ||
e642df6a JL |
697 | data = memdup_user((void __user *)(unsigned long)src, len); |
698 | if (IS_ERR(data)) | |
699 | return PTR_ERR(data); | |
a5b74540 HR |
700 | |
701 | *dest = data; | |
702 | return 0; | |
703 | } | |
704 | ||
705 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
706 | { | |
6a9af2e1 | 707 | struct ib_user_path_rec upath; |
a5b74540 HR |
708 | struct ib_sa_path_rec *sa_path; |
709 | ||
710 | *path = NULL; | |
711 | ||
712 | if (!src) | |
713 | return 0; | |
714 | ||
715 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
716 | if (!sa_path) | |
717 | return -ENOMEM; | |
718 | ||
6a9af2e1 SH |
719 | if (copy_from_user(&upath, (void __user *)(unsigned long)src, |
720 | sizeof(upath))) { | |
a5b74540 HR |
721 | |
722 | kfree(sa_path); | |
723 | return -EFAULT; | |
724 | } | |
725 | ||
6a9af2e1 | 726 | ib_copy_path_rec_from_user(sa_path, &upath); |
a5b74540 HR |
727 | *path = sa_path; |
728 | return 0; | |
729 | } | |
730 | ||
731 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
732 | const char __user *inbuf, | |
733 | int in_len, int out_len) | |
734 | { | |
735 | struct ib_cm_req_param param; | |
736 | struct ib_ucm_context *ctx; | |
737 | struct ib_ucm_req cmd; | |
738 | int result; | |
739 | ||
740 | param.private_data = NULL; | |
741 | param.primary_path = NULL; | |
742 | param.alternate_path = NULL; | |
743 | ||
744 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
745 | return -EFAULT; | |
746 | ||
747 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
748 | if (result) | |
749 | goto done; | |
750 | ||
751 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
752 | if (result) | |
753 | goto done; | |
754 | ||
755 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
756 | if (result) | |
757 | goto done; | |
758 | ||
759 | param.private_data_len = cmd.len; | |
760 | param.service_id = cmd.sid; | |
761 | param.qp_num = cmd.qpn; | |
762 | param.qp_type = cmd.qp_type; | |
763 | param.starting_psn = cmd.psn; | |
764 | param.peer_to_peer = cmd.peer_to_peer; | |
765 | param.responder_resources = cmd.responder_resources; | |
766 | param.initiator_depth = cmd.initiator_depth; | |
767 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
768 | param.flow_control = cmd.flow_control; | |
769 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
770 | param.retry_count = cmd.retry_count; | |
771 | param.rnr_retry_count = cmd.rnr_retry_count; | |
772 | param.max_cm_retries = cmd.max_cm_retries; | |
773 | param.srq = cmd.srq; | |
774 | ||
b9ef520f SH |
775 | ctx = ib_ucm_ctx_get(file, cmd.id); |
776 | if (!IS_ERR(ctx)) { | |
a5b74540 | 777 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
778 | ib_ucm_ctx_put(ctx); |
779 | } else | |
780 | result = PTR_ERR(ctx); | |
a5b74540 | 781 | |
a5b74540 | 782 | done: |
79d81907 HR |
783 | kfree(param.private_data); |
784 | kfree(param.primary_path); | |
785 | kfree(param.alternate_path); | |
a5b74540 HR |
786 | return result; |
787 | } | |
788 | ||
789 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
790 | const char __user *inbuf, | |
791 | int in_len, int out_len) | |
792 | { | |
793 | struct ib_cm_rep_param param; | |
794 | struct ib_ucm_context *ctx; | |
795 | struct ib_ucm_rep cmd; | |
796 | int result; | |
797 | ||
798 | param.private_data = NULL; | |
799 | ||
800 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
801 | return -EFAULT; | |
802 | ||
803 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
804 | if (result) | |
805 | return result; | |
806 | ||
807 | param.qp_num = cmd.qpn; | |
808 | param.starting_psn = cmd.psn; | |
809 | param.private_data_len = cmd.len; | |
810 | param.responder_resources = cmd.responder_resources; | |
811 | param.initiator_depth = cmd.initiator_depth; | |
a5b74540 HR |
812 | param.failover_accepted = cmd.failover_accepted; |
813 | param.flow_control = cmd.flow_control; | |
814 | param.rnr_retry_count = cmd.rnr_retry_count; | |
815 | param.srq = cmd.srq; | |
816 | ||
b9ef520f SH |
817 | ctx = ib_ucm_ctx_get(file, cmd.id); |
818 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 819 | ctx->uid = cmd.uid; |
a5b74540 | 820 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
821 | ib_ucm_ctx_put(ctx); |
822 | } else | |
823 | result = PTR_ERR(ctx); | |
a5b74540 | 824 | |
79d81907 | 825 | kfree(param.private_data); |
a5b74540 HR |
826 | return result; |
827 | } | |
828 | ||
829 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
830 | const char __user *inbuf, int in_len, | |
831 | int (*func)(struct ib_cm_id *cm_id, | |
832 | const void *private_data, | |
833 | u8 private_data_len)) | |
834 | { | |
835 | struct ib_ucm_private_data cmd; | |
836 | struct ib_ucm_context *ctx; | |
837 | const void *private_data = NULL; | |
838 | int result; | |
839 | ||
840 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
841 | return -EFAULT; | |
842 | ||
843 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
844 | if (result) | |
845 | return result; | |
846 | ||
b9ef520f SH |
847 | ctx = ib_ucm_ctx_get(file, cmd.id); |
848 | if (!IS_ERR(ctx)) { | |
a5b74540 | 849 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
850 | ib_ucm_ctx_put(ctx); |
851 | } else | |
852 | result = PTR_ERR(ctx); | |
a5b74540 | 853 | |
79d81907 | 854 | kfree(private_data); |
a5b74540 HR |
855 | return result; |
856 | } | |
857 | ||
858 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
859 | const char __user *inbuf, | |
860 | int in_len, int out_len) | |
861 | { | |
862 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
863 | } | |
864 | ||
865 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
866 | const char __user *inbuf, | |
867 | int in_len, int out_len) | |
868 | { | |
869 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
870 | } | |
871 | ||
872 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
873 | const char __user *inbuf, | |
874 | int in_len, int out_len) | |
875 | { | |
876 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
877 | } | |
878 | ||
879 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
880 | const char __user *inbuf, int in_len, | |
881 | int (*func)(struct ib_cm_id *cm_id, | |
882 | int status, | |
883 | const void *info, | |
884 | u8 info_len, | |
885 | const void *data, | |
886 | u8 data_len)) | |
887 | { | |
888 | struct ib_ucm_context *ctx; | |
889 | struct ib_ucm_info cmd; | |
890 | const void *data = NULL; | |
891 | const void *info = NULL; | |
892 | int result; | |
893 | ||
894 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
895 | return -EFAULT; | |
896 | ||
897 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
898 | if (result) | |
899 | goto done; | |
900 | ||
901 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
902 | if (result) | |
903 | goto done; | |
904 | ||
b9ef520f SH |
905 | ctx = ib_ucm_ctx_get(file, cmd.id); |
906 | if (!IS_ERR(ctx)) { | |
907 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 908 | data, cmd.data_len); |
b9ef520f SH |
909 | ib_ucm_ctx_put(ctx); |
910 | } else | |
911 | result = PTR_ERR(ctx); | |
a5b74540 | 912 | |
a5b74540 | 913 | done: |
79d81907 HR |
914 | kfree(data); |
915 | kfree(info); | |
a5b74540 HR |
916 | return result; |
917 | } | |
918 | ||
919 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
920 | const char __user *inbuf, | |
921 | int in_len, int out_len) | |
922 | { | |
923 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
924 | } | |
925 | ||
926 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
927 | const char __user *inbuf, | |
928 | int in_len, int out_len) | |
929 | { | |
930 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
931 | } | |
932 | ||
933 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
934 | const char __user *inbuf, | |
935 | int in_len, int out_len) | |
936 | { | |
937 | struct ib_ucm_context *ctx; | |
938 | struct ib_ucm_mra cmd; | |
939 | const void *data = NULL; | |
940 | int result; | |
941 | ||
942 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
943 | return -EFAULT; | |
944 | ||
945 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
946 | if (result) | |
947 | return result; | |
948 | ||
b9ef520f SH |
949 | ctx = ib_ucm_ctx_get(file, cmd.id); |
950 | if (!IS_ERR(ctx)) { | |
951 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
952 | ib_ucm_ctx_put(ctx); | |
953 | } else | |
954 | result = PTR_ERR(ctx); | |
a5b74540 | 955 | |
79d81907 | 956 | kfree(data); |
a5b74540 HR |
957 | return result; |
958 | } | |
959 | ||
960 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
961 | const char __user *inbuf, | |
962 | int in_len, int out_len) | |
963 | { | |
964 | struct ib_ucm_context *ctx; | |
965 | struct ib_sa_path_rec *path = NULL; | |
966 | struct ib_ucm_lap cmd; | |
967 | const void *data = NULL; | |
968 | int result; | |
969 | ||
970 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
971 | return -EFAULT; | |
972 | ||
973 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
974 | if (result) | |
975 | goto done; | |
976 | ||
977 | result = ib_ucm_path_get(&path, cmd.path); | |
978 | if (result) | |
979 | goto done; | |
980 | ||
b9ef520f SH |
981 | ctx = ib_ucm_ctx_get(file, cmd.id); |
982 | if (!IS_ERR(ctx)) { | |
a5b74540 | 983 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
984 | ib_ucm_ctx_put(ctx); |
985 | } else | |
986 | result = PTR_ERR(ctx); | |
a5b74540 | 987 | |
a5b74540 | 988 | done: |
79d81907 HR |
989 | kfree(data); |
990 | kfree(path); | |
a5b74540 HR |
991 | return result; |
992 | } | |
993 | ||
994 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
995 | const char __user *inbuf, | |
996 | int in_len, int out_len) | |
997 | { | |
998 | struct ib_cm_sidr_req_param param; | |
999 | struct ib_ucm_context *ctx; | |
1000 | struct ib_ucm_sidr_req cmd; | |
1001 | int result; | |
1002 | ||
1003 | param.private_data = NULL; | |
1004 | param.path = NULL; | |
1005 | ||
1006 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1007 | return -EFAULT; | |
1008 | ||
1009 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1010 | if (result) | |
1011 | goto done; | |
1012 | ||
1013 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1014 | if (result) | |
1015 | goto done; | |
1016 | ||
1017 | param.private_data_len = cmd.len; | |
1018 | param.service_id = cmd.sid; | |
1019 | param.timeout_ms = cmd.timeout; | |
1020 | param.max_cm_retries = cmd.max_cm_retries; | |
a5b74540 | 1021 | |
b9ef520f SH |
1022 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1023 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1024 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1025 | ib_ucm_ctx_put(ctx); |
1026 | } else | |
1027 | result = PTR_ERR(ctx); | |
a5b74540 | 1028 | |
a5b74540 | 1029 | done: |
79d81907 HR |
1030 | kfree(param.private_data); |
1031 | kfree(param.path); | |
a5b74540 HR |
1032 | return result; |
1033 | } | |
1034 | ||
1035 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1036 | const char __user *inbuf, | |
1037 | int in_len, int out_len) | |
1038 | { | |
1039 | struct ib_cm_sidr_rep_param param; | |
1040 | struct ib_ucm_sidr_rep cmd; | |
1041 | struct ib_ucm_context *ctx; | |
1042 | int result; | |
1043 | ||
1044 | param.info = NULL; | |
1045 | ||
1046 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1047 | return -EFAULT; | |
1048 | ||
1049 | result = ib_ucm_alloc_data(¶m.private_data, | |
1050 | cmd.data, cmd.data_len); | |
1051 | if (result) | |
1052 | goto done; | |
1053 | ||
1054 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1055 | if (result) | |
1056 | goto done; | |
1057 | ||
b9ef520f SH |
1058 | param.qp_num = cmd.qpn; |
1059 | param.qkey = cmd.qkey; | |
1060 | param.status = cmd.status; | |
1061 | param.info_length = cmd.info_len; | |
1062 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1063 | |
b9ef520f SH |
1064 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1065 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1066 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1067 | ib_ucm_ctx_put(ctx); |
1068 | } else | |
1069 | result = PTR_ERR(ctx); | |
a5b74540 | 1070 | |
a5b74540 | 1071 | done: |
79d81907 HR |
1072 | kfree(param.private_data); |
1073 | kfree(param.info); | |
a5b74540 HR |
1074 | return result; |
1075 | } | |
1076 | ||
1077 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1078 | const char __user *inbuf, | |
1079 | int in_len, int out_len) = { | |
1080 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1081 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1082 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1083 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
e1444b5a | 1084 | [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, |
a5b74540 HR |
1085 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, |
1086 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1087 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1088 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1089 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1090 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1091 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1092 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1093 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1094 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1095 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1096 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1097 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1098 | }; |
1099 | ||
1100 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1101 | size_t len, loff_t *pos) | |
1102 | { | |
1103 | struct ib_ucm_file *file = filp->private_data; | |
1104 | struct ib_ucm_cmd_hdr hdr; | |
1105 | ssize_t result; | |
1106 | ||
e6bd18f5 JG |
1107 | if (WARN_ON_ONCE(!ib_safe_file_access(filp))) |
1108 | return -EACCES; | |
1109 | ||
a5b74540 HR |
1110 | if (len < sizeof(hdr)) |
1111 | return -EINVAL; | |
1112 | ||
1113 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1114 | return -EFAULT; | |
1115 | ||
caf6e3f2 | 1116 | if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
a5b74540 HR |
1117 | return -EINVAL; |
1118 | ||
1119 | if (hdr.in + sizeof(hdr) > len) | |
1120 | return -EINVAL; | |
1121 | ||
1122 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1123 | hdr.in, hdr.out); | |
1124 | if (!result) | |
1125 | result = len; | |
1126 | ||
1127 | return result; | |
1128 | } | |
1129 | ||
1130 | static unsigned int ib_ucm_poll(struct file *filp, | |
1131 | struct poll_table_struct *wait) | |
1132 | { | |
1133 | struct ib_ucm_file *file = filp->private_data; | |
1134 | unsigned int mask = 0; | |
1135 | ||
1136 | poll_wait(filp, &file->poll_wait, wait); | |
1137 | ||
1138 | if (!list_empty(&file->events)) | |
1139 | mask = POLLIN | POLLRDNORM; | |
1140 | ||
1141 | return mask; | |
1142 | } | |
1143 | ||
5ba18b18 RD |
1144 | /* |
1145 | * ib_ucm_open() does not need the BKL: | |
1146 | * | |
1147 | * - no global state is referred to; | |
1148 | * - there is no ioctl method to race against; | |
1149 | * - no further module initialization is required for open to work | |
1150 | * after the device is registered. | |
1151 | */ | |
a5b74540 HR |
1152 | static int ib_ucm_open(struct inode *inode, struct file *filp) |
1153 | { | |
1154 | struct ib_ucm_file *file; | |
1155 | ||
1156 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1157 | if (!file) | |
1158 | return -ENOMEM; | |
1159 | ||
1160 | INIT_LIST_HEAD(&file->events); | |
1161 | INIT_LIST_HEAD(&file->ctxs); | |
1162 | init_waitqueue_head(&file->poll_wait); | |
1163 | ||
4be10c1e | 1164 | mutex_init(&file->file_mutex); |
a5b74540 HR |
1165 | |
1166 | filp->private_data = file; | |
1167 | file->filp = filp; | |
f4e91eb4 | 1168 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); |
a5b74540 | 1169 | |
bc1db9af | 1170 | return nonseekable_open(inode, filp); |
a5b74540 HR |
1171 | } |
1172 | ||
1173 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1174 | { | |
1175 | struct ib_ucm_file *file = filp->private_data; | |
1176 | struct ib_ucm_context *ctx; | |
1177 | ||
4be10c1e | 1178 | mutex_lock(&file->file_mutex); |
a5b74540 | 1179 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1180 | ctx = list_entry(file->ctxs.next, |
1181 | struct ib_ucm_context, file_list); | |
4be10c1e | 1182 | mutex_unlock(&file->file_mutex); |
0b2b35f6 | 1183 | |
95ed644f | 1184 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1185 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1186 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1187 | |
1188 | ib_destroy_cm_id(ctx->cm_id); | |
1189 | ib_ucm_cleanup_events(ctx); | |
1190 | kfree(ctx); | |
1191 | ||
4be10c1e | 1192 | mutex_lock(&file->file_mutex); |
a5b74540 | 1193 | } |
4be10c1e | 1194 | mutex_unlock(&file->file_mutex); |
a5b74540 | 1195 | kfree(file); |
a5b74540 HR |
1196 | return 0; |
1197 | } | |
1198 | ||
59d40dd9 | 1199 | static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); |
f4e91eb4 | 1200 | static void ib_ucm_release_dev(struct device *dev) |
07d357d0 | 1201 | { |
f4e91eb4 | 1202 | struct ib_ucm_device *ucm_dev; |
07d357d0 | 1203 | |
f4e91eb4 TJ |
1204 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1205 | cdev_del(&ucm_dev->cdev); | |
daa91358 AC |
1206 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1207 | clear_bit(ucm_dev->devnum, dev_map); | |
1208 | else | |
59d40dd9 | 1209 | clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, overflow_map); |
f4e91eb4 | 1210 | kfree(ucm_dev); |
07d357d0 SH |
1211 | } |
1212 | ||
2b8693c0 | 1213 | static const struct file_operations ucm_fops = { |
cdb8e438 AC |
1214 | .owner = THIS_MODULE, |
1215 | .open = ib_ucm_open, | |
a5b74540 | 1216 | .release = ib_ucm_close, |
cdb8e438 | 1217 | .write = ib_ucm_write, |
a5b74540 | 1218 | .poll = ib_ucm_poll, |
bc1db9af | 1219 | .llseek = no_llseek, |
a5b74540 HR |
1220 | }; |
1221 | ||
f4e91eb4 TJ |
1222 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1223 | char *buf) | |
07d357d0 | 1224 | { |
f4e91eb4 | 1225 | struct ib_ucm_device *ucm_dev; |
3cd96564 | 1226 | |
f4e91eb4 TJ |
1227 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1228 | return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); | |
07d357d0 | 1229 | } |
f4e91eb4 | 1230 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
a5b74540 | 1231 | |
daa91358 | 1232 | static dev_t overflow_maj; |
daa91358 AC |
1233 | static int find_overflow_devnum(void) |
1234 | { | |
1235 | int ret; | |
1236 | ||
1237 | if (!overflow_maj) { | |
1238 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, | |
1239 | "infiniband_cm"); | |
1240 | if (ret) { | |
aba25a3e | 1241 | pr_err("ucm: couldn't register dynamic device number\n"); |
daa91358 AC |
1242 | return ret; |
1243 | } | |
1244 | } | |
1245 | ||
1246 | ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); | |
1247 | if (ret >= IB_UCM_MAX_DEVICES) | |
1248 | return -1; | |
1249 | ||
1250 | return ret; | |
1251 | } | |
1252 | ||
07d357d0 | 1253 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1254 | { |
dd08f702 | 1255 | int devnum; |
31d14b6e | 1256 | dev_t base; |
07d357d0 | 1257 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1258 | |
72219cea | 1259 | if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) |
07d357d0 SH |
1260 | return; |
1261 | ||
de6eb66b | 1262 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1263 | if (!ucm_dev) |
1264 | return; | |
a5b74540 | 1265 | |
07d357d0 | 1266 | ucm_dev->ib_dev = device; |
a5b74540 | 1267 | |
dd08f702 | 1268 | devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1269 | if (devnum >= IB_UCM_MAX_DEVICES) { |
1270 | devnum = find_overflow_devnum(); | |
1271 | if (devnum < 0) | |
1272 | goto err; | |
1273 | ||
1274 | ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; | |
1275 | base = devnum + overflow_maj; | |
1276 | set_bit(devnum, overflow_map); | |
1277 | } else { | |
1278 | ucm_dev->devnum = devnum; | |
1279 | base = devnum + IB_UCM_BASE_DEV; | |
1280 | set_bit(devnum, dev_map); | |
1281 | } | |
07d357d0 | 1282 | |
f4e91eb4 TJ |
1283 | cdev_init(&ucm_dev->cdev, &ucm_fops); |
1284 | ucm_dev->cdev.owner = THIS_MODULE; | |
1285 | kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); | |
31d14b6e | 1286 | if (cdev_add(&ucm_dev->cdev, base, 1)) |
07d357d0 SH |
1287 | goto err; |
1288 | ||
f4e91eb4 TJ |
1289 | ucm_dev->dev.class = &cm_class; |
1290 | ucm_dev->dev.parent = device->dma_device; | |
1291 | ucm_dev->dev.devt = ucm_dev->cdev.dev; | |
1292 | ucm_dev->dev.release = ib_ucm_release_dev; | |
d927e38c | 1293 | dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); |
f4e91eb4 | 1294 | if (device_register(&ucm_dev->dev)) |
a5b74540 | 1295 | goto err_cdev; |
a5b74540 | 1296 | |
f4e91eb4 TJ |
1297 | if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) |
1298 | goto err_dev; | |
07d357d0 SH |
1299 | |
1300 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1301 | return; | |
1302 | ||
f4e91eb4 TJ |
1303 | err_dev: |
1304 | device_unregister(&ucm_dev->dev); | |
07d357d0 | 1305 | err_cdev: |
f4e91eb4 | 1306 | cdev_del(&ucm_dev->cdev); |
daa91358 AC |
1307 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1308 | clear_bit(devnum, dev_map); | |
1309 | else | |
1310 | clear_bit(devnum, overflow_map); | |
07d357d0 SH |
1311 | err: |
1312 | kfree(ucm_dev); | |
1313 | return; | |
1314 | } | |
1315 | ||
7c1eb45a | 1316 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data) |
07d357d0 | 1317 | { |
7c1eb45a | 1318 | struct ib_ucm_device *ucm_dev = client_data; |
07d357d0 SH |
1319 | |
1320 | if (!ucm_dev) | |
1321 | return; | |
1322 | ||
f4e91eb4 | 1323 | device_unregister(&ucm_dev->dev); |
07d357d0 SH |
1324 | } |
1325 | ||
0933e2d9 AK |
1326 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1327 | __stringify(IB_USER_CM_ABI_VERSION)); | |
07d357d0 SH |
1328 | |
1329 | static int __init ib_ucm_init(void) | |
1330 | { | |
1331 | int ret; | |
1332 | ||
1333 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1334 | "infiniband_cm"); | |
1335 | if (ret) { | |
aba25a3e | 1336 | pr_err("ucm: couldn't register device number\n"); |
9af57b7a | 1337 | goto error1; |
a5b74540 HR |
1338 | } |
1339 | ||
0933e2d9 | 1340 | ret = class_create_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1341 | if (ret) { |
aba25a3e | 1342 | pr_err("ucm: couldn't create abi_version attribute\n"); |
9af57b7a | 1343 | goto error2; |
07d357d0 | 1344 | } |
a5b74540 | 1345 | |
07d357d0 SH |
1346 | ret = ib_register_client(&ucm_client); |
1347 | if (ret) { | |
aba25a3e | 1348 | pr_err("ucm: couldn't register client\n"); |
9af57b7a | 1349 | goto error3; |
07d357d0 | 1350 | } |
a5b74540 | 1351 | return 0; |
07d357d0 | 1352 | |
9af57b7a | 1353 | error3: |
0933e2d9 | 1354 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
9af57b7a | 1355 | error2: |
07d357d0 | 1356 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
9af57b7a | 1357 | error1: |
07d357d0 | 1358 | return ret; |
a5b74540 HR |
1359 | } |
1360 | ||
1361 | static void __exit ib_ucm_cleanup(void) | |
1362 | { | |
07d357d0 | 1363 | ib_unregister_client(&ucm_client); |
0933e2d9 | 1364 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1365 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1366 | if (overflow_maj) |
1367 | unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1368 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1369 | } |
1370 | ||
1371 | module_init(ib_ucm_init); | |
1372 | module_exit(ib_ucm_cleanup); |