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 | ||
9af57b7a SH |
109 | /* ib_cm and ib_user_cm modules share /sys/class/infiniband_cm */ |
110 | extern struct class cm_class; | |
111 | ||
07d357d0 | 112 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 113 | |
07d357d0 SH |
114 | static void ib_ucm_add_one(struct ib_device *device); |
115 | static void ib_ucm_remove_one(struct ib_device *device); | |
a5b74540 | 116 | |
07d357d0 SH |
117 | static struct ib_client ucm_client = { |
118 | .name = "ucm", | |
119 | .add = ib_ucm_add_one, | |
120 | .remove = ib_ucm_remove_one | |
121 | }; | |
122 | ||
95ed644f | 123 | static DEFINE_MUTEX(ctx_id_mutex); |
762a03e2 | 124 | static DEFINE_IDR(ctx_id_table); |
07d357d0 | 125 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 126 | |
b9ef520f | 127 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
128 | { |
129 | struct ib_ucm_context *ctx; | |
130 | ||
95ed644f | 131 | mutex_lock(&ctx_id_mutex); |
a5b74540 | 132 | ctx = idr_find(&ctx_id_table, id); |
b9ef520f SH |
133 | if (!ctx) |
134 | ctx = ERR_PTR(-ENOENT); | |
135 | else if (ctx->file != file) | |
136 | ctx = ERR_PTR(-EINVAL); | |
137 | else | |
138 | atomic_inc(&ctx->ref); | |
95ed644f | 139 | mutex_unlock(&ctx_id_mutex); |
a5b74540 HR |
140 | |
141 | return ctx; | |
142 | } | |
143 | ||
144 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
145 | { | |
b9ef520f | 146 | if (atomic_dec_and_test(&ctx->ref)) |
1b52fa98 | 147 | complete(&ctx->comp); |
b9ef520f SH |
148 | } |
149 | ||
0b2b35f6 | 150 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 151 | { |
0b2b35f6 SH |
152 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
153 | } | |
b9ef520f | 154 | |
0b2b35f6 SH |
155 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
156 | { | |
157 | struct ib_ucm_event *uevent; | |
a5b74540 | 158 | |
4be10c1e | 159 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
160 | list_del(&ctx->file_list); |
161 | while (!list_empty(&ctx->events)) { | |
162 | ||
163 | uevent = list_entry(ctx->events.next, | |
164 | struct ib_ucm_event, ctx_list); | |
165 | list_del(&uevent->file_list); | |
166 | list_del(&uevent->ctx_list); | |
f469b262 | 167 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
168 | |
169 | /* clear incoming connections. */ | |
0b2b35f6 | 170 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
171 | ib_destroy_cm_id(uevent->cm_id); |
172 | ||
173 | kfree(uevent); | |
f469b262 | 174 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 | 175 | } |
4be10c1e | 176 | mutex_unlock(&ctx->file->file_mutex); |
a5b74540 HR |
177 | } |
178 | ||
179 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
180 | { | |
181 | struct ib_ucm_context *ctx; | |
182 | int result; | |
183 | ||
de6eb66b | 184 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
185 | if (!ctx) |
186 | return NULL; | |
187 | ||
b9ef520f | 188 | atomic_set(&ctx->ref, 1); |
1b52fa98 | 189 | init_completion(&ctx->comp); |
a5b74540 | 190 | ctx->file = file; |
a5b74540 | 191 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 192 | |
0b2b35f6 SH |
193 | do { |
194 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
195 | if (!result) | |
196 | goto error; | |
a5b74540 | 197 | |
95ed644f | 198 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 199 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); |
95ed644f | 200 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 201 | } while (result == -EAGAIN); |
a5b74540 | 202 | |
a5b74540 HR |
203 | if (result) |
204 | goto error; | |
205 | ||
0b2b35f6 | 206 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 207 | return ctx; |
0b2b35f6 | 208 | |
a5b74540 | 209 | error: |
a5b74540 | 210 | kfree(ctx); |
a5b74540 HR |
211 | return NULL; |
212 | } | |
07d357d0 | 213 | |
0b2b35f6 | 214 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
215 | struct ib_cm_req_event_param *kreq) |
216 | { | |
a5b74540 HR |
217 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
218 | ureq->remote_qkey = kreq->remote_qkey; | |
219 | ureq->remote_qpn = kreq->remote_qpn; | |
220 | ureq->qp_type = kreq->qp_type; | |
221 | ureq->starting_psn = kreq->starting_psn; | |
222 | ureq->responder_resources = kreq->responder_resources; | |
223 | ureq->initiator_depth = kreq->initiator_depth; | |
224 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
225 | ureq->flow_control = kreq->flow_control; | |
226 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
227 | ureq->retry_count = kreq->retry_count; | |
228 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
229 | ureq->srq = kreq->srq; | |
07d357d0 | 230 | ureq->port = kreq->port; |
a5b74540 | 231 | |
6a9af2e1 SH |
232 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
233 | if (kreq->alternate_path) | |
234 | ib_copy_path_rec_to_user(&ureq->alternate_path, | |
235 | kreq->alternate_path); | |
a5b74540 HR |
236 | } |
237 | ||
238 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
239 | struct ib_cm_rep_event_param *krep) | |
240 | { | |
241 | urep->remote_ca_guid = krep->remote_ca_guid; | |
242 | urep->remote_qkey = krep->remote_qkey; | |
243 | urep->remote_qpn = krep->remote_qpn; | |
244 | urep->starting_psn = krep->starting_psn; | |
245 | urep->responder_resources = krep->responder_resources; | |
246 | urep->initiator_depth = krep->initiator_depth; | |
247 | urep->target_ack_delay = krep->target_ack_delay; | |
248 | urep->failover_accepted = krep->failover_accepted; | |
249 | urep->flow_control = krep->flow_control; | |
250 | urep->rnr_retry_count = krep->rnr_retry_count; | |
251 | urep->srq = krep->srq; | |
252 | } | |
253 | ||
a5b74540 HR |
254 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
255 | struct ib_cm_sidr_rep_event_param *krep) | |
256 | { | |
257 | urep->status = krep->status; | |
258 | urep->qkey = krep->qkey; | |
259 | urep->qpn = krep->qpn; | |
260 | }; | |
261 | ||
0b2b35f6 | 262 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
263 | struct ib_ucm_event *uvt) |
264 | { | |
265 | void *info = NULL; | |
a5b74540 HR |
266 | |
267 | switch (evt->event) { | |
268 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 269 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
270 | &evt->param.req_rcvd); |
271 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 272 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
273 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
274 | IB_UCM_PRES_ALTERNATE : 0); | |
275 | break; | |
276 | case IB_CM_REP_RECEIVED: | |
277 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
278 | &evt->param.rep_rcvd); | |
279 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
280 | break; |
281 | case IB_CM_RTU_RECEIVED: | |
282 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
283 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
284 | break; |
285 | case IB_CM_DREQ_RECEIVED: | |
286 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
287 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
288 | break; |
289 | case IB_CM_DREP_RECEIVED: | |
290 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
291 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
292 | break; |
293 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
294 | uvt->resp.u.mra_resp.timeout = |
295 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 296 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
297 | break; |
298 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 299 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
300 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
301 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
302 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
303 | break; |
304 | case IB_CM_LAP_RECEIVED: | |
6a9af2e1 SH |
305 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
306 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 307 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 308 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
309 | break; |
310 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 311 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
312 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
313 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
314 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
315 | break; |
316 | case IB_CM_SIDR_REQ_RECEIVED: | |
3cd96564 | 317 | uvt->resp.u.sidr_req_resp.pkey = |
0b2b35f6 | 318 | evt->param.sidr_req_rcvd.pkey; |
3cd96564 | 319 | uvt->resp.u.sidr_req_resp.port = |
07d357d0 | 320 | evt->param.sidr_req_rcvd.port; |
a5b74540 | 321 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
322 | break; |
323 | case IB_CM_SIDR_REP_RECEIVED: | |
324 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
325 | &evt->param.sidr_rep_rcvd); | |
326 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
327 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
328 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
329 | break; |
330 | default: | |
331 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
332 | break; |
333 | } | |
334 | ||
b9ef520f | 335 | if (uvt->data_len) { |
bed8bdfd | 336 | uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
337 | if (!uvt->data) |
338 | goto err1; | |
a5b74540 | 339 | |
a5b74540 HR |
340 | uvt->resp.present |= IB_UCM_PRES_DATA; |
341 | } | |
342 | ||
b9ef520f | 343 | if (uvt->info_len) { |
bed8bdfd | 344 | uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
345 | if (!uvt->info) |
346 | goto err2; | |
a5b74540 | 347 | |
a5b74540 HR |
348 | uvt->resp.present |= IB_UCM_PRES_INFO; |
349 | } | |
a5b74540 | 350 | return 0; |
b9ef520f SH |
351 | |
352 | err2: | |
79d81907 | 353 | kfree(uvt->data); |
b9ef520f SH |
354 | err1: |
355 | return -ENOMEM; | |
a5b74540 HR |
356 | } |
357 | ||
358 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
359 | struct ib_cm_event *event) | |
360 | { | |
361 | struct ib_ucm_event *uevent; | |
362 | struct ib_ucm_context *ctx; | |
363 | int result = 0; | |
a5b74540 | 364 | |
b9ef520f | 365 | ctx = cm_id->context; |
a5b74540 | 366 | |
de6eb66b | 367 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
368 | if (!uevent) |
369 | goto err1; | |
a5b74540 | 370 | |
0b2b35f6 SH |
371 | uevent->ctx = ctx; |
372 | uevent->cm_id = cm_id; | |
373 | uevent->resp.uid = ctx->uid; | |
374 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
375 | uevent->resp.event = event->event; |
376 | ||
0b2b35f6 | 377 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 378 | if (result) |
b9ef520f | 379 | goto err2; |
a5b74540 | 380 | |
4be10c1e | 381 | mutex_lock(&ctx->file->file_mutex); |
a5b74540 HR |
382 | list_add_tail(&uevent->file_list, &ctx->file->events); |
383 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 384 | wake_up_interruptible(&ctx->file->poll_wait); |
4be10c1e | 385 | mutex_unlock(&ctx->file->file_mutex); |
b9ef520f SH |
386 | return 0; |
387 | ||
388 | err2: | |
389 | kfree(uevent); | |
390 | err1: | |
391 | /* Destroy new cm_id's */ | |
0b2b35f6 | 392 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
393 | } |
394 | ||
395 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
396 | const char __user *inbuf, | |
397 | int in_len, int out_len) | |
398 | { | |
399 | struct ib_ucm_context *ctx; | |
400 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 401 | struct ib_ucm_event *uevent; |
a5b74540 HR |
402 | int result = 0; |
403 | DEFINE_WAIT(wait); | |
404 | ||
405 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
406 | return -ENOSPC; | |
407 | ||
408 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
409 | return -EFAULT; | |
07d357d0 | 410 | |
4be10c1e | 411 | mutex_lock(&file->file_mutex); |
a5b74540 | 412 | while (list_empty(&file->events)) { |
9d41b7fd | 413 | mutex_unlock(&file->file_mutex); |
a5b74540 | 414 | |
9d41b7fd SH |
415 | if (file->filp->f_flags & O_NONBLOCK) |
416 | return -EAGAIN; | |
a5b74540 | 417 | |
9d41b7fd SH |
418 | if (wait_event_interruptible(file->poll_wait, |
419 | !list_empty(&file->events))) | |
420 | return -ERESTARTSYS; | |
a5b74540 | 421 | |
4be10c1e | 422 | mutex_lock(&file->file_mutex); |
a5b74540 HR |
423 | } |
424 | ||
a5b74540 HR |
425 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); |
426 | ||
0b2b35f6 SH |
427 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
428 | ctx = ib_ucm_ctx_alloc(file); | |
429 | if (!ctx) { | |
430 | result = -ENOMEM; | |
431 | goto done; | |
432 | } | |
a5b74540 | 433 | |
0b2b35f6 SH |
434 | ctx->cm_id = uevent->cm_id; |
435 | ctx->cm_id->context = ctx; | |
436 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
437 | } |
438 | ||
a5b74540 HR |
439 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
440 | &uevent->resp, sizeof(uevent->resp))) { | |
441 | result = -EFAULT; | |
442 | goto done; | |
443 | } | |
444 | ||
445 | if (uevent->data) { | |
a5b74540 HR |
446 | if (cmd.data_len < uevent->data_len) { |
447 | result = -ENOMEM; | |
448 | goto done; | |
449 | } | |
a5b74540 HR |
450 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
451 | uevent->data, uevent->data_len)) { | |
452 | result = -EFAULT; | |
453 | goto done; | |
454 | } | |
455 | } | |
456 | ||
457 | if (uevent->info) { | |
a5b74540 HR |
458 | if (cmd.info_len < uevent->info_len) { |
459 | result = -ENOMEM; | |
460 | goto done; | |
461 | } | |
a5b74540 HR |
462 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
463 | uevent->info, uevent->info_len)) { | |
464 | result = -EFAULT; | |
465 | goto done; | |
466 | } | |
467 | } | |
468 | ||
469 | list_del(&uevent->file_list); | |
470 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 471 | uevent->ctx->events_reported++; |
a5b74540 | 472 | |
79d81907 HR |
473 | kfree(uevent->data); |
474 | kfree(uevent->info); | |
a5b74540 HR |
475 | kfree(uevent); |
476 | done: | |
4be10c1e | 477 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
478 | return result; |
479 | } | |
480 | ||
a5b74540 HR |
481 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
482 | const char __user *inbuf, | |
483 | int in_len, int out_len) | |
484 | { | |
485 | struct ib_ucm_create_id cmd; | |
486 | struct ib_ucm_create_id_resp resp; | |
487 | struct ib_ucm_context *ctx; | |
488 | int result; | |
489 | ||
490 | if (out_len < sizeof(resp)) | |
491 | return -ENOSPC; | |
492 | ||
493 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
494 | return -EFAULT; | |
495 | ||
4be10c1e | 496 | mutex_lock(&file->file_mutex); |
a5b74540 | 497 | ctx = ib_ucm_ctx_alloc(file); |
4be10c1e | 498 | mutex_unlock(&file->file_mutex); |
a5b74540 HR |
499 | if (!ctx) |
500 | return -ENOMEM; | |
501 | ||
0b2b35f6 | 502 | ctx->uid = cmd.uid; |
07d357d0 SH |
503 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
504 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
505 | if (IS_ERR(ctx->cm_id)) { |
506 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 507 | goto err1; |
a5b74540 HR |
508 | } |
509 | ||
510 | resp.id = ctx->id; | |
511 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
512 | &resp, sizeof(resp))) { | |
513 | result = -EFAULT; | |
07d357d0 | 514 | goto err2; |
a5b74540 | 515 | } |
a5b74540 | 516 | return 0; |
a5b74540 | 517 | |
07d357d0 SH |
518 | err2: |
519 | ib_destroy_cm_id(ctx->cm_id); | |
520 | err1: | |
95ed644f | 521 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 522 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 523 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 524 | kfree(ctx); |
a5b74540 HR |
525 | return result; |
526 | } | |
527 | ||
528 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
529 | const char __user *inbuf, | |
530 | int in_len, int out_len) | |
531 | { | |
532 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
533 | struct ib_ucm_destroy_id_resp resp; |
534 | struct ib_ucm_context *ctx; | |
535 | int result = 0; | |
536 | ||
537 | if (out_len < sizeof(resp)) | |
538 | return -ENOSPC; | |
a5b74540 HR |
539 | |
540 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
541 | return -EFAULT; | |
542 | ||
95ed644f | 543 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
544 | ctx = idr_find(&ctx_id_table, cmd.id); |
545 | if (!ctx) | |
546 | ctx = ERR_PTR(-ENOENT); | |
547 | else if (ctx->file != file) | |
548 | ctx = ERR_PTR(-EINVAL); | |
549 | else | |
550 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 551 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
552 | |
553 | if (IS_ERR(ctx)) | |
554 | return PTR_ERR(ctx); | |
555 | ||
1b52fa98 SH |
556 | ib_ucm_ctx_put(ctx); |
557 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
558 | |
559 | /* No new events will be generated after destroying the cm_id. */ | |
560 | ib_destroy_cm_id(ctx->cm_id); | |
561 | /* Cleanup events not yet reported to the user. */ | |
562 | ib_ucm_cleanup_events(ctx); | |
563 | ||
564 | resp.events_reported = ctx->events_reported; | |
565 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
566 | &resp, sizeof(resp))) | |
567 | result = -EFAULT; | |
568 | ||
569 | kfree(ctx); | |
570 | return result; | |
a5b74540 HR |
571 | } |
572 | ||
573 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
574 | const char __user *inbuf, | |
575 | int in_len, int out_len) | |
576 | { | |
577 | struct ib_ucm_attr_id_resp resp; | |
578 | struct ib_ucm_attr_id cmd; | |
579 | struct ib_ucm_context *ctx; | |
580 | int result = 0; | |
581 | ||
582 | if (out_len < sizeof(resp)) | |
583 | return -ENOSPC; | |
584 | ||
585 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
586 | return -EFAULT; | |
587 | ||
b9ef520f SH |
588 | ctx = ib_ucm_ctx_get(file, cmd.id); |
589 | if (IS_ERR(ctx)) | |
590 | return PTR_ERR(ctx); | |
a5b74540 HR |
591 | |
592 | resp.service_id = ctx->cm_id->service_id; | |
593 | resp.service_mask = ctx->cm_id->service_mask; | |
594 | resp.local_id = ctx->cm_id->local_id; | |
595 | resp.remote_id = ctx->cm_id->remote_id; | |
596 | ||
597 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
598 | &resp, sizeof(resp))) | |
599 | result = -EFAULT; | |
600 | ||
b9ef520f | 601 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
602 | return result; |
603 | } | |
604 | ||
0b2b35f6 SH |
605 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
606 | const char __user *inbuf, | |
607 | int in_len, int out_len) | |
608 | { | |
6a9af2e1 | 609 | struct ib_uverbs_qp_attr resp; |
0b2b35f6 SH |
610 | struct ib_ucm_init_qp_attr cmd; |
611 | struct ib_ucm_context *ctx; | |
612 | struct ib_qp_attr qp_attr; | |
613 | int result = 0; | |
614 | ||
615 | if (out_len < sizeof(resp)) | |
616 | return -ENOSPC; | |
617 | ||
618 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
619 | return -EFAULT; | |
620 | ||
621 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
622 | if (IS_ERR(ctx)) | |
623 | return PTR_ERR(ctx); | |
624 | ||
625 | resp.qp_attr_mask = 0; | |
626 | memset(&qp_attr, 0, sizeof qp_attr); | |
627 | qp_attr.qp_state = cmd.qp_state; | |
628 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
629 | if (result) | |
630 | goto out; | |
631 | ||
6a9af2e1 | 632 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
0b2b35f6 SH |
633 | |
634 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
635 | &resp, sizeof(resp))) | |
636 | result = -EFAULT; | |
637 | ||
638 | out: | |
639 | ib_ucm_ctx_put(ctx); | |
640 | return result; | |
641 | } | |
642 | ||
6e61d04f SH |
643 | static int ucm_validate_listen(__be64 service_id, __be64 service_mask) |
644 | { | |
645 | service_id &= service_mask; | |
646 | ||
647 | if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || | |
648 | ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) | |
649 | return -EINVAL; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
a5b74540 HR |
654 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
655 | const char __user *inbuf, | |
656 | int in_len, int out_len) | |
657 | { | |
658 | struct ib_ucm_listen cmd; | |
659 | struct ib_ucm_context *ctx; | |
660 | int result; | |
661 | ||
662 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
663 | return -EFAULT; | |
664 | ||
b9ef520f SH |
665 | ctx = ib_ucm_ctx_get(file, cmd.id); |
666 | if (IS_ERR(ctx)) | |
667 | return PTR_ERR(ctx); | |
a5b74540 | 668 | |
6e61d04f SH |
669 | result = ucm_validate_listen(cmd.service_id, cmd.service_mask); |
670 | if (result) | |
671 | goto out; | |
672 | ||
673 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask, | |
674 | NULL); | |
675 | out: | |
b9ef520f | 676 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
677 | return result; |
678 | } | |
679 | ||
e1444b5a SH |
680 | static ssize_t ib_ucm_notify(struct ib_ucm_file *file, |
681 | const char __user *inbuf, | |
682 | int in_len, int out_len) | |
a5b74540 | 683 | { |
e1444b5a | 684 | struct ib_ucm_notify cmd; |
a5b74540 HR |
685 | struct ib_ucm_context *ctx; |
686 | int result; | |
687 | ||
688 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
689 | return -EFAULT; | |
690 | ||
b9ef520f SH |
691 | ctx = ib_ucm_ctx_get(file, cmd.id); |
692 | if (IS_ERR(ctx)) | |
693 | return PTR_ERR(ctx); | |
a5b74540 | 694 | |
e1444b5a | 695 | result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
b9ef520f | 696 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
697 | return result; |
698 | } | |
699 | ||
700 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
701 | { | |
702 | void *data; | |
703 | ||
704 | *dest = NULL; | |
705 | ||
706 | if (!len) | |
707 | return 0; | |
708 | ||
709 | data = kmalloc(len, GFP_KERNEL); | |
710 | if (!data) | |
711 | return -ENOMEM; | |
712 | ||
713 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
714 | kfree(data); | |
715 | return -EFAULT; | |
716 | } | |
717 | ||
718 | *dest = data; | |
719 | return 0; | |
720 | } | |
721 | ||
722 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
723 | { | |
6a9af2e1 | 724 | struct ib_user_path_rec upath; |
a5b74540 HR |
725 | struct ib_sa_path_rec *sa_path; |
726 | ||
727 | *path = NULL; | |
728 | ||
729 | if (!src) | |
730 | return 0; | |
731 | ||
732 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
733 | if (!sa_path) | |
734 | return -ENOMEM; | |
735 | ||
6a9af2e1 SH |
736 | if (copy_from_user(&upath, (void __user *)(unsigned long)src, |
737 | sizeof(upath))) { | |
a5b74540 HR |
738 | |
739 | kfree(sa_path); | |
740 | return -EFAULT; | |
741 | } | |
742 | ||
6a9af2e1 | 743 | ib_copy_path_rec_from_user(sa_path, &upath); |
a5b74540 HR |
744 | *path = sa_path; |
745 | return 0; | |
746 | } | |
747 | ||
748 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
749 | const char __user *inbuf, | |
750 | int in_len, int out_len) | |
751 | { | |
752 | struct ib_cm_req_param param; | |
753 | struct ib_ucm_context *ctx; | |
754 | struct ib_ucm_req cmd; | |
755 | int result; | |
756 | ||
757 | param.private_data = NULL; | |
758 | param.primary_path = NULL; | |
759 | param.alternate_path = NULL; | |
760 | ||
761 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
762 | return -EFAULT; | |
763 | ||
764 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
765 | if (result) | |
766 | goto done; | |
767 | ||
768 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
769 | if (result) | |
770 | goto done; | |
771 | ||
772 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
773 | if (result) | |
774 | goto done; | |
775 | ||
776 | param.private_data_len = cmd.len; | |
777 | param.service_id = cmd.sid; | |
778 | param.qp_num = cmd.qpn; | |
779 | param.qp_type = cmd.qp_type; | |
780 | param.starting_psn = cmd.psn; | |
781 | param.peer_to_peer = cmd.peer_to_peer; | |
782 | param.responder_resources = cmd.responder_resources; | |
783 | param.initiator_depth = cmd.initiator_depth; | |
784 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
785 | param.flow_control = cmd.flow_control; | |
786 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
787 | param.retry_count = cmd.retry_count; | |
788 | param.rnr_retry_count = cmd.rnr_retry_count; | |
789 | param.max_cm_retries = cmd.max_cm_retries; | |
790 | param.srq = cmd.srq; | |
791 | ||
b9ef520f SH |
792 | ctx = ib_ucm_ctx_get(file, cmd.id); |
793 | if (!IS_ERR(ctx)) { | |
a5b74540 | 794 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
795 | ib_ucm_ctx_put(ctx); |
796 | } else | |
797 | result = PTR_ERR(ctx); | |
a5b74540 | 798 | |
a5b74540 | 799 | done: |
79d81907 HR |
800 | kfree(param.private_data); |
801 | kfree(param.primary_path); | |
802 | kfree(param.alternate_path); | |
a5b74540 HR |
803 | return result; |
804 | } | |
805 | ||
806 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
807 | const char __user *inbuf, | |
808 | int in_len, int out_len) | |
809 | { | |
810 | struct ib_cm_rep_param param; | |
811 | struct ib_ucm_context *ctx; | |
812 | struct ib_ucm_rep cmd; | |
813 | int result; | |
814 | ||
815 | param.private_data = NULL; | |
816 | ||
817 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
818 | return -EFAULT; | |
819 | ||
820 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
821 | if (result) | |
822 | return result; | |
823 | ||
824 | param.qp_num = cmd.qpn; | |
825 | param.starting_psn = cmd.psn; | |
826 | param.private_data_len = cmd.len; | |
827 | param.responder_resources = cmd.responder_resources; | |
828 | param.initiator_depth = cmd.initiator_depth; | |
a5b74540 HR |
829 | param.failover_accepted = cmd.failover_accepted; |
830 | param.flow_control = cmd.flow_control; | |
831 | param.rnr_retry_count = cmd.rnr_retry_count; | |
832 | param.srq = cmd.srq; | |
833 | ||
b9ef520f SH |
834 | ctx = ib_ucm_ctx_get(file, cmd.id); |
835 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 836 | ctx->uid = cmd.uid; |
a5b74540 | 837 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
838 | ib_ucm_ctx_put(ctx); |
839 | } else | |
840 | result = PTR_ERR(ctx); | |
a5b74540 | 841 | |
79d81907 | 842 | kfree(param.private_data); |
a5b74540 HR |
843 | return result; |
844 | } | |
845 | ||
846 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
847 | const char __user *inbuf, int in_len, | |
848 | int (*func)(struct ib_cm_id *cm_id, | |
849 | const void *private_data, | |
850 | u8 private_data_len)) | |
851 | { | |
852 | struct ib_ucm_private_data cmd; | |
853 | struct ib_ucm_context *ctx; | |
854 | const void *private_data = NULL; | |
855 | int result; | |
856 | ||
857 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
858 | return -EFAULT; | |
859 | ||
860 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
861 | if (result) | |
862 | return result; | |
863 | ||
b9ef520f SH |
864 | ctx = ib_ucm_ctx_get(file, cmd.id); |
865 | if (!IS_ERR(ctx)) { | |
a5b74540 | 866 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
867 | ib_ucm_ctx_put(ctx); |
868 | } else | |
869 | result = PTR_ERR(ctx); | |
a5b74540 | 870 | |
79d81907 | 871 | kfree(private_data); |
a5b74540 HR |
872 | return result; |
873 | } | |
874 | ||
875 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
876 | const char __user *inbuf, | |
877 | int in_len, int out_len) | |
878 | { | |
879 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
880 | } | |
881 | ||
882 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
883 | const char __user *inbuf, | |
884 | int in_len, int out_len) | |
885 | { | |
886 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
887 | } | |
888 | ||
889 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
890 | const char __user *inbuf, | |
891 | int in_len, int out_len) | |
892 | { | |
893 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
894 | } | |
895 | ||
896 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
897 | const char __user *inbuf, int in_len, | |
898 | int (*func)(struct ib_cm_id *cm_id, | |
899 | int status, | |
900 | const void *info, | |
901 | u8 info_len, | |
902 | const void *data, | |
903 | u8 data_len)) | |
904 | { | |
905 | struct ib_ucm_context *ctx; | |
906 | struct ib_ucm_info cmd; | |
907 | const void *data = NULL; | |
908 | const void *info = NULL; | |
909 | int result; | |
910 | ||
911 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
912 | return -EFAULT; | |
913 | ||
914 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
915 | if (result) | |
916 | goto done; | |
917 | ||
918 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
919 | if (result) | |
920 | goto done; | |
921 | ||
b9ef520f SH |
922 | ctx = ib_ucm_ctx_get(file, cmd.id); |
923 | if (!IS_ERR(ctx)) { | |
924 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 925 | data, cmd.data_len); |
b9ef520f SH |
926 | ib_ucm_ctx_put(ctx); |
927 | } else | |
928 | result = PTR_ERR(ctx); | |
a5b74540 | 929 | |
a5b74540 | 930 | done: |
79d81907 HR |
931 | kfree(data); |
932 | kfree(info); | |
a5b74540 HR |
933 | return result; |
934 | } | |
935 | ||
936 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
937 | const char __user *inbuf, | |
938 | int in_len, int out_len) | |
939 | { | |
940 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
941 | } | |
942 | ||
943 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
944 | const char __user *inbuf, | |
945 | int in_len, int out_len) | |
946 | { | |
947 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
948 | } | |
949 | ||
950 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
951 | const char __user *inbuf, | |
952 | int in_len, int out_len) | |
953 | { | |
954 | struct ib_ucm_context *ctx; | |
955 | struct ib_ucm_mra cmd; | |
956 | const void *data = NULL; | |
957 | int result; | |
958 | ||
959 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
960 | return -EFAULT; | |
961 | ||
962 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
963 | if (result) | |
964 | return result; | |
965 | ||
b9ef520f SH |
966 | ctx = ib_ucm_ctx_get(file, cmd.id); |
967 | if (!IS_ERR(ctx)) { | |
968 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
969 | ib_ucm_ctx_put(ctx); | |
970 | } else | |
971 | result = PTR_ERR(ctx); | |
a5b74540 | 972 | |
79d81907 | 973 | kfree(data); |
a5b74540 HR |
974 | return result; |
975 | } | |
976 | ||
977 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
978 | const char __user *inbuf, | |
979 | int in_len, int out_len) | |
980 | { | |
981 | struct ib_ucm_context *ctx; | |
982 | struct ib_sa_path_rec *path = NULL; | |
983 | struct ib_ucm_lap cmd; | |
984 | const void *data = NULL; | |
985 | int result; | |
986 | ||
987 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
988 | return -EFAULT; | |
989 | ||
990 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
991 | if (result) | |
992 | goto done; | |
993 | ||
994 | result = ib_ucm_path_get(&path, cmd.path); | |
995 | if (result) | |
996 | goto done; | |
997 | ||
b9ef520f SH |
998 | ctx = ib_ucm_ctx_get(file, cmd.id); |
999 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1000 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
1001 | ib_ucm_ctx_put(ctx); |
1002 | } else | |
1003 | result = PTR_ERR(ctx); | |
a5b74540 | 1004 | |
a5b74540 | 1005 | done: |
79d81907 HR |
1006 | kfree(data); |
1007 | kfree(path); | |
a5b74540 HR |
1008 | return result; |
1009 | } | |
1010 | ||
1011 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1012 | const char __user *inbuf, | |
1013 | int in_len, int out_len) | |
1014 | { | |
1015 | struct ib_cm_sidr_req_param param; | |
1016 | struct ib_ucm_context *ctx; | |
1017 | struct ib_ucm_sidr_req cmd; | |
1018 | int result; | |
1019 | ||
1020 | param.private_data = NULL; | |
1021 | param.path = NULL; | |
1022 | ||
1023 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1024 | return -EFAULT; | |
1025 | ||
1026 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1027 | if (result) | |
1028 | goto done; | |
1029 | ||
1030 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1031 | if (result) | |
1032 | goto done; | |
1033 | ||
1034 | param.private_data_len = cmd.len; | |
1035 | param.service_id = cmd.sid; | |
1036 | param.timeout_ms = cmd.timeout; | |
1037 | param.max_cm_retries = cmd.max_cm_retries; | |
a5b74540 | 1038 | |
b9ef520f SH |
1039 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1040 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1041 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1042 | ib_ucm_ctx_put(ctx); |
1043 | } else | |
1044 | result = PTR_ERR(ctx); | |
a5b74540 | 1045 | |
a5b74540 | 1046 | done: |
79d81907 HR |
1047 | kfree(param.private_data); |
1048 | kfree(param.path); | |
a5b74540 HR |
1049 | return result; |
1050 | } | |
1051 | ||
1052 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1053 | const char __user *inbuf, | |
1054 | int in_len, int out_len) | |
1055 | { | |
1056 | struct ib_cm_sidr_rep_param param; | |
1057 | struct ib_ucm_sidr_rep cmd; | |
1058 | struct ib_ucm_context *ctx; | |
1059 | int result; | |
1060 | ||
1061 | param.info = NULL; | |
1062 | ||
1063 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1064 | return -EFAULT; | |
1065 | ||
1066 | result = ib_ucm_alloc_data(¶m.private_data, | |
1067 | cmd.data, cmd.data_len); | |
1068 | if (result) | |
1069 | goto done; | |
1070 | ||
1071 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1072 | if (result) | |
1073 | goto done; | |
1074 | ||
b9ef520f SH |
1075 | param.qp_num = cmd.qpn; |
1076 | param.qkey = cmd.qkey; | |
1077 | param.status = cmd.status; | |
1078 | param.info_length = cmd.info_len; | |
1079 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1080 | |
b9ef520f SH |
1081 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1082 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1083 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1084 | ib_ucm_ctx_put(ctx); |
1085 | } else | |
1086 | result = PTR_ERR(ctx); | |
a5b74540 | 1087 | |
a5b74540 | 1088 | done: |
79d81907 HR |
1089 | kfree(param.private_data); |
1090 | kfree(param.info); | |
a5b74540 HR |
1091 | return result; |
1092 | } | |
1093 | ||
1094 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1095 | const char __user *inbuf, | |
1096 | int in_len, int out_len) = { | |
1097 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1098 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1099 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1100 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
e1444b5a | 1101 | [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, |
a5b74540 HR |
1102 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, |
1103 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1104 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1105 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1106 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1107 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1108 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1109 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1110 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1111 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1112 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1113 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1114 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1115 | }; |
1116 | ||
1117 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1118 | size_t len, loff_t *pos) | |
1119 | { | |
1120 | struct ib_ucm_file *file = filp->private_data; | |
1121 | struct ib_ucm_cmd_hdr hdr; | |
1122 | ssize_t result; | |
1123 | ||
1124 | if (len < sizeof(hdr)) | |
1125 | return -EINVAL; | |
1126 | ||
1127 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1128 | return -EFAULT; | |
1129 | ||
a5b74540 HR |
1130 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
1131 | return -EINVAL; | |
1132 | ||
1133 | if (hdr.in + sizeof(hdr) > len) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1137 | hdr.in, hdr.out); | |
1138 | if (!result) | |
1139 | result = len; | |
1140 | ||
1141 | return result; | |
1142 | } | |
1143 | ||
1144 | static unsigned int ib_ucm_poll(struct file *filp, | |
1145 | struct poll_table_struct *wait) | |
1146 | { | |
1147 | struct ib_ucm_file *file = filp->private_data; | |
1148 | unsigned int mask = 0; | |
1149 | ||
1150 | poll_wait(filp, &file->poll_wait, wait); | |
1151 | ||
1152 | if (!list_empty(&file->events)) | |
1153 | mask = POLLIN | POLLRDNORM; | |
1154 | ||
1155 | return mask; | |
1156 | } | |
1157 | ||
5ba18b18 RD |
1158 | /* |
1159 | * ib_ucm_open() does not need the BKL: | |
1160 | * | |
1161 | * - no global state is referred to; | |
1162 | * - there is no ioctl method to race against; | |
1163 | * - no further module initialization is required for open to work | |
1164 | * after the device is registered. | |
1165 | */ | |
a5b74540 HR |
1166 | static int ib_ucm_open(struct inode *inode, struct file *filp) |
1167 | { | |
1168 | struct ib_ucm_file *file; | |
1169 | ||
1170 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1171 | if (!file) | |
1172 | return -ENOMEM; | |
1173 | ||
1174 | INIT_LIST_HEAD(&file->events); | |
1175 | INIT_LIST_HEAD(&file->ctxs); | |
1176 | init_waitqueue_head(&file->poll_wait); | |
1177 | ||
4be10c1e | 1178 | mutex_init(&file->file_mutex); |
a5b74540 HR |
1179 | |
1180 | filp->private_data = file; | |
1181 | file->filp = filp; | |
f4e91eb4 | 1182 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); |
a5b74540 | 1183 | |
bc1db9af | 1184 | return nonseekable_open(inode, filp); |
a5b74540 HR |
1185 | } |
1186 | ||
1187 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1188 | { | |
1189 | struct ib_ucm_file *file = filp->private_data; | |
1190 | struct ib_ucm_context *ctx; | |
1191 | ||
4be10c1e | 1192 | mutex_lock(&file->file_mutex); |
a5b74540 | 1193 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1194 | ctx = list_entry(file->ctxs.next, |
1195 | struct ib_ucm_context, file_list); | |
4be10c1e | 1196 | mutex_unlock(&file->file_mutex); |
0b2b35f6 | 1197 | |
95ed644f | 1198 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1199 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1200 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1201 | |
1202 | ib_destroy_cm_id(ctx->cm_id); | |
1203 | ib_ucm_cleanup_events(ctx); | |
1204 | kfree(ctx); | |
1205 | ||
4be10c1e | 1206 | mutex_lock(&file->file_mutex); |
a5b74540 | 1207 | } |
4be10c1e | 1208 | mutex_unlock(&file->file_mutex); |
a5b74540 | 1209 | kfree(file); |
a5b74540 HR |
1210 | return 0; |
1211 | } | |
1212 | ||
f4e91eb4 | 1213 | static void ib_ucm_release_dev(struct device *dev) |
07d357d0 | 1214 | { |
f4e91eb4 | 1215 | struct ib_ucm_device *ucm_dev; |
07d357d0 | 1216 | |
f4e91eb4 TJ |
1217 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1218 | cdev_del(&ucm_dev->cdev); | |
daa91358 AC |
1219 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1220 | clear_bit(ucm_dev->devnum, dev_map); | |
1221 | else | |
1222 | clear_bit(ucm_dev->devnum - IB_UCM_MAX_DEVICES, dev_map); | |
f4e91eb4 | 1223 | kfree(ucm_dev); |
07d357d0 SH |
1224 | } |
1225 | ||
2b8693c0 | 1226 | static const struct file_operations ucm_fops = { |
cdb8e438 AC |
1227 | .owner = THIS_MODULE, |
1228 | .open = ib_ucm_open, | |
a5b74540 | 1229 | .release = ib_ucm_close, |
cdb8e438 | 1230 | .write = ib_ucm_write, |
a5b74540 | 1231 | .poll = ib_ucm_poll, |
bc1db9af | 1232 | .llseek = no_llseek, |
a5b74540 HR |
1233 | }; |
1234 | ||
f4e91eb4 TJ |
1235 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1236 | char *buf) | |
07d357d0 | 1237 | { |
f4e91eb4 | 1238 | struct ib_ucm_device *ucm_dev; |
3cd96564 | 1239 | |
f4e91eb4 TJ |
1240 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
1241 | return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); | |
07d357d0 | 1242 | } |
f4e91eb4 | 1243 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
a5b74540 | 1244 | |
daa91358 AC |
1245 | static dev_t overflow_maj; |
1246 | static DECLARE_BITMAP(overflow_map, IB_UCM_MAX_DEVICES); | |
1247 | static int find_overflow_devnum(void) | |
1248 | { | |
1249 | int ret; | |
1250 | ||
1251 | if (!overflow_maj) { | |
1252 | ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES, | |
1253 | "infiniband_cm"); | |
1254 | if (ret) { | |
1255 | printk(KERN_ERR "ucm: couldn't register dynamic device number\n"); | |
1256 | return ret; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | ret = find_first_zero_bit(overflow_map, IB_UCM_MAX_DEVICES); | |
1261 | if (ret >= IB_UCM_MAX_DEVICES) | |
1262 | return -1; | |
1263 | ||
1264 | return ret; | |
1265 | } | |
1266 | ||
07d357d0 | 1267 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1268 | { |
dd08f702 | 1269 | int devnum; |
31d14b6e | 1270 | dev_t base; |
07d357d0 | 1271 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1272 | |
07ebafba TT |
1273 | if (!device->alloc_ucontext || |
1274 | rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) | |
07d357d0 SH |
1275 | return; |
1276 | ||
de6eb66b | 1277 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1278 | if (!ucm_dev) |
1279 | return; | |
a5b74540 | 1280 | |
07d357d0 | 1281 | ucm_dev->ib_dev = device; |
a5b74540 | 1282 | |
dd08f702 | 1283 | devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1284 | if (devnum >= IB_UCM_MAX_DEVICES) { |
1285 | devnum = find_overflow_devnum(); | |
1286 | if (devnum < 0) | |
1287 | goto err; | |
1288 | ||
1289 | ucm_dev->devnum = devnum + IB_UCM_MAX_DEVICES; | |
1290 | base = devnum + overflow_maj; | |
1291 | set_bit(devnum, overflow_map); | |
1292 | } else { | |
1293 | ucm_dev->devnum = devnum; | |
1294 | base = devnum + IB_UCM_BASE_DEV; | |
1295 | set_bit(devnum, dev_map); | |
1296 | } | |
07d357d0 | 1297 | |
f4e91eb4 TJ |
1298 | cdev_init(&ucm_dev->cdev, &ucm_fops); |
1299 | ucm_dev->cdev.owner = THIS_MODULE; | |
1300 | kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); | |
31d14b6e | 1301 | if (cdev_add(&ucm_dev->cdev, base, 1)) |
07d357d0 SH |
1302 | goto err; |
1303 | ||
f4e91eb4 TJ |
1304 | ucm_dev->dev.class = &cm_class; |
1305 | ucm_dev->dev.parent = device->dma_device; | |
1306 | ucm_dev->dev.devt = ucm_dev->cdev.dev; | |
1307 | ucm_dev->dev.release = ib_ucm_release_dev; | |
d927e38c | 1308 | dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); |
f4e91eb4 | 1309 | if (device_register(&ucm_dev->dev)) |
a5b74540 | 1310 | goto err_cdev; |
a5b74540 | 1311 | |
f4e91eb4 TJ |
1312 | if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) |
1313 | goto err_dev; | |
07d357d0 SH |
1314 | |
1315 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1316 | return; | |
1317 | ||
f4e91eb4 TJ |
1318 | err_dev: |
1319 | device_unregister(&ucm_dev->dev); | |
07d357d0 | 1320 | err_cdev: |
f4e91eb4 | 1321 | cdev_del(&ucm_dev->cdev); |
daa91358 AC |
1322 | if (ucm_dev->devnum < IB_UCM_MAX_DEVICES) |
1323 | clear_bit(devnum, dev_map); | |
1324 | else | |
1325 | clear_bit(devnum, overflow_map); | |
07d357d0 SH |
1326 | err: |
1327 | kfree(ucm_dev); | |
1328 | return; | |
1329 | } | |
1330 | ||
1331 | static void ib_ucm_remove_one(struct ib_device *device) | |
1332 | { | |
1333 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1334 | ||
1335 | if (!ucm_dev) | |
1336 | return; | |
1337 | ||
f4e91eb4 | 1338 | device_unregister(&ucm_dev->dev); |
07d357d0 SH |
1339 | } |
1340 | ||
0933e2d9 AK |
1341 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
1342 | __stringify(IB_USER_CM_ABI_VERSION)); | |
07d357d0 SH |
1343 | |
1344 | static int __init ib_ucm_init(void) | |
1345 | { | |
1346 | int ret; | |
1347 | ||
1348 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1349 | "infiniband_cm"); | |
1350 | if (ret) { | |
1351 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
9af57b7a | 1352 | goto error1; |
a5b74540 HR |
1353 | } |
1354 | ||
0933e2d9 | 1355 | ret = class_create_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 SH |
1356 | if (ret) { |
1357 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
9af57b7a | 1358 | goto error2; |
07d357d0 | 1359 | } |
a5b74540 | 1360 | |
07d357d0 SH |
1361 | ret = ib_register_client(&ucm_client); |
1362 | if (ret) { | |
1363 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
9af57b7a | 1364 | goto error3; |
07d357d0 | 1365 | } |
a5b74540 | 1366 | return 0; |
07d357d0 | 1367 | |
9af57b7a | 1368 | error3: |
0933e2d9 | 1369 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
9af57b7a | 1370 | error2: |
07d357d0 | 1371 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
9af57b7a | 1372 | error1: |
07d357d0 | 1373 | return ret; |
a5b74540 HR |
1374 | } |
1375 | ||
1376 | static void __exit ib_ucm_cleanup(void) | |
1377 | { | |
07d357d0 | 1378 | ib_unregister_client(&ucm_client); |
0933e2d9 | 1379 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
07d357d0 | 1380 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); |
daa91358 AC |
1381 | if (overflow_maj) |
1382 | unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1383 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1384 | } |
1385 | ||
1386 | module_init(ib_ucm_init); | |
1387 | module_exit(ib_ucm_cleanup); |