Commit | Line | Data |
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a5b74540 HR |
1 | /* |
2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. | |
b9ef520f | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
a5b74540 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | * | |
33 | * $Id: ucm.c 2594 2005-06-13 19:46:02Z libor $ | |
34 | */ | |
1b52fa98 SH |
35 | |
36 | #include <linux/completion.h> | |
a5b74540 HR |
37 | #include <linux/init.h> |
38 | #include <linux/fs.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/device.h> | |
41 | #include <linux/err.h> | |
42 | #include <linux/poll.h> | |
43 | #include <linux/file.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/cdev.h> | |
595e726a | 46 | #include <linux/idr.h> |
95ed644f | 47 | #include <linux/mutex.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> | |
a5b74540 HR |
53 | |
54 | MODULE_AUTHOR("Libor Michalek"); | |
55 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); | |
56 | MODULE_LICENSE("Dual BSD/GPL"); | |
57 | ||
07d357d0 SH |
58 | struct ib_ucm_device { |
59 | int devnum; | |
60 | struct cdev dev; | |
61 | struct class_device class_dev; | |
62 | struct ib_device *ib_dev; | |
63 | }; | |
64 | ||
595e726a SH |
65 | struct ib_ucm_file { |
66 | struct semaphore mutex; | |
67 | struct file *filp; | |
07d357d0 | 68 | struct ib_ucm_device *device; |
79d81907 | 69 | |
07d357d0 SH |
70 | struct list_head ctxs; |
71 | struct list_head events; | |
595e726a SH |
72 | wait_queue_head_t poll_wait; |
73 | }; | |
74 | ||
75 | struct ib_ucm_context { | |
76 | int id; | |
1b52fa98 | 77 | struct completion comp; |
595e726a SH |
78 | atomic_t ref; |
79 | int events_reported; | |
80 | ||
81 | struct ib_ucm_file *file; | |
82 | struct ib_cm_id *cm_id; | |
83 | __u64 uid; | |
84 | ||
85 | struct list_head events; /* list of pending events. */ | |
86 | struct list_head file_list; /* member in file ctx list */ | |
87 | }; | |
88 | ||
89 | struct ib_ucm_event { | |
90 | struct ib_ucm_context *ctx; | |
91 | struct list_head file_list; /* member in file event list */ | |
92 | struct list_head ctx_list; /* member in ctx event list */ | |
93 | ||
94 | struct ib_cm_id *cm_id; | |
95 | struct ib_ucm_event_resp resp; | |
96 | void *data; | |
97 | void *info; | |
98 | int data_len; | |
99 | int info_len; | |
100 | }; | |
79d81907 | 101 | |
a5b74540 HR |
102 | enum { |
103 | IB_UCM_MAJOR = 231, | |
07d357d0 SH |
104 | IB_UCM_BASE_MINOR = 224, |
105 | IB_UCM_MAX_DEVICES = 32 | |
a5b74540 HR |
106 | }; |
107 | ||
07d357d0 | 108 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
a5b74540 | 109 | |
07d357d0 SH |
110 | static void ib_ucm_add_one(struct ib_device *device); |
111 | static void ib_ucm_remove_one(struct ib_device *device); | |
a5b74540 | 112 | |
07d357d0 SH |
113 | static struct ib_client ucm_client = { |
114 | .name = "ucm", | |
115 | .add = ib_ucm_add_one, | |
116 | .remove = ib_ucm_remove_one | |
117 | }; | |
118 | ||
95ed644f | 119 | static DEFINE_MUTEX(ctx_id_mutex); |
762a03e2 | 120 | static DEFINE_IDR(ctx_id_table); |
07d357d0 | 121 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
595e726a | 122 | |
b9ef520f | 123 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
a5b74540 HR |
124 | { |
125 | struct ib_ucm_context *ctx; | |
126 | ||
95ed644f | 127 | mutex_lock(&ctx_id_mutex); |
a5b74540 | 128 | ctx = idr_find(&ctx_id_table, id); |
b9ef520f SH |
129 | if (!ctx) |
130 | ctx = ERR_PTR(-ENOENT); | |
131 | else if (ctx->file != file) | |
132 | ctx = ERR_PTR(-EINVAL); | |
133 | else | |
134 | atomic_inc(&ctx->ref); | |
95ed644f | 135 | mutex_unlock(&ctx_id_mutex); |
a5b74540 HR |
136 | |
137 | return ctx; | |
138 | } | |
139 | ||
140 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) | |
141 | { | |
b9ef520f | 142 | if (atomic_dec_and_test(&ctx->ref)) |
1b52fa98 | 143 | complete(&ctx->comp); |
b9ef520f SH |
144 | } |
145 | ||
0b2b35f6 | 146 | static inline int ib_ucm_new_cm_id(int event) |
b9ef520f | 147 | { |
0b2b35f6 SH |
148 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
149 | } | |
b9ef520f | 150 | |
0b2b35f6 SH |
151 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
152 | { | |
153 | struct ib_ucm_event *uevent; | |
a5b74540 | 154 | |
0b2b35f6 | 155 | down(&ctx->file->mutex); |
a5b74540 HR |
156 | list_del(&ctx->file_list); |
157 | while (!list_empty(&ctx->events)) { | |
158 | ||
159 | uevent = list_entry(ctx->events.next, | |
160 | struct ib_ucm_event, ctx_list); | |
161 | list_del(&uevent->file_list); | |
162 | list_del(&uevent->ctx_list); | |
163 | ||
164 | /* clear incoming connections. */ | |
0b2b35f6 | 165 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
a5b74540 HR |
166 | ib_destroy_cm_id(uevent->cm_id); |
167 | ||
168 | kfree(uevent); | |
169 | } | |
0b2b35f6 | 170 | up(&ctx->file->mutex); |
a5b74540 HR |
171 | } |
172 | ||
173 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) | |
174 | { | |
175 | struct ib_ucm_context *ctx; | |
176 | int result; | |
177 | ||
de6eb66b | 178 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
a5b74540 HR |
179 | if (!ctx) |
180 | return NULL; | |
181 | ||
b9ef520f | 182 | atomic_set(&ctx->ref, 1); |
1b52fa98 | 183 | init_completion(&ctx->comp); |
a5b74540 | 184 | ctx->file = file; |
a5b74540 | 185 | INIT_LIST_HEAD(&ctx->events); |
a5b74540 | 186 | |
0b2b35f6 SH |
187 | do { |
188 | result = idr_pre_get(&ctx_id_table, GFP_KERNEL); | |
189 | if (!result) | |
190 | goto error; | |
a5b74540 | 191 | |
95ed644f | 192 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 193 | result = idr_get_new(&ctx_id_table, ctx, &ctx->id); |
95ed644f | 194 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 195 | } while (result == -EAGAIN); |
a5b74540 | 196 | |
a5b74540 HR |
197 | if (result) |
198 | goto error; | |
199 | ||
0b2b35f6 | 200 | list_add_tail(&ctx->file_list, &file->ctxs); |
a5b74540 | 201 | return ctx; |
0b2b35f6 | 202 | |
a5b74540 | 203 | error: |
a5b74540 | 204 | kfree(ctx); |
a5b74540 HR |
205 | return NULL; |
206 | } | |
07d357d0 | 207 | |
a5b74540 HR |
208 | static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath, |
209 | struct ib_sa_path_rec *kpath) | |
210 | { | |
211 | if (!kpath || !upath) | |
212 | return; | |
213 | ||
b9ef520f SH |
214 | memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid); |
215 | memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid); | |
a5b74540 HR |
216 | |
217 | upath->dlid = kpath->dlid; | |
218 | upath->slid = kpath->slid; | |
219 | upath->raw_traffic = kpath->raw_traffic; | |
220 | upath->flow_label = kpath->flow_label; | |
221 | upath->hop_limit = kpath->hop_limit; | |
222 | upath->traffic_class = kpath->traffic_class; | |
223 | upath->reversible = kpath->reversible; | |
224 | upath->numb_path = kpath->numb_path; | |
225 | upath->pkey = kpath->pkey; | |
226 | upath->sl = kpath->sl; | |
227 | upath->mtu_selector = kpath->mtu_selector; | |
228 | upath->mtu = kpath->mtu; | |
229 | upath->rate_selector = kpath->rate_selector; | |
230 | upath->rate = kpath->rate; | |
231 | upath->packet_life_time = kpath->packet_life_time; | |
232 | upath->preference = kpath->preference; | |
233 | ||
234 | upath->packet_life_time_selector = | |
235 | kpath->packet_life_time_selector; | |
236 | } | |
237 | ||
0b2b35f6 | 238 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
a5b74540 HR |
239 | struct ib_cm_req_event_param *kreq) |
240 | { | |
a5b74540 HR |
241 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
242 | ureq->remote_qkey = kreq->remote_qkey; | |
243 | ureq->remote_qpn = kreq->remote_qpn; | |
244 | ureq->qp_type = kreq->qp_type; | |
245 | ureq->starting_psn = kreq->starting_psn; | |
246 | ureq->responder_resources = kreq->responder_resources; | |
247 | ureq->initiator_depth = kreq->initiator_depth; | |
248 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; | |
249 | ureq->flow_control = kreq->flow_control; | |
250 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; | |
251 | ureq->retry_count = kreq->retry_count; | |
252 | ureq->rnr_retry_count = kreq->rnr_retry_count; | |
253 | ureq->srq = kreq->srq; | |
07d357d0 | 254 | ureq->port = kreq->port; |
a5b74540 HR |
255 | |
256 | ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path); | |
257 | ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path); | |
258 | } | |
259 | ||
260 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, | |
261 | struct ib_cm_rep_event_param *krep) | |
262 | { | |
263 | urep->remote_ca_guid = krep->remote_ca_guid; | |
264 | urep->remote_qkey = krep->remote_qkey; | |
265 | urep->remote_qpn = krep->remote_qpn; | |
266 | urep->starting_psn = krep->starting_psn; | |
267 | urep->responder_resources = krep->responder_resources; | |
268 | urep->initiator_depth = krep->initiator_depth; | |
269 | urep->target_ack_delay = krep->target_ack_delay; | |
270 | urep->failover_accepted = krep->failover_accepted; | |
271 | urep->flow_control = krep->flow_control; | |
272 | urep->rnr_retry_count = krep->rnr_retry_count; | |
273 | urep->srq = krep->srq; | |
274 | } | |
275 | ||
a5b74540 HR |
276 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
277 | struct ib_cm_sidr_rep_event_param *krep) | |
278 | { | |
279 | urep->status = krep->status; | |
280 | urep->qkey = krep->qkey; | |
281 | urep->qpn = krep->qpn; | |
282 | }; | |
283 | ||
0b2b35f6 | 284 | static int ib_ucm_event_process(struct ib_cm_event *evt, |
a5b74540 HR |
285 | struct ib_ucm_event *uvt) |
286 | { | |
287 | void *info = NULL; | |
a5b74540 HR |
288 | |
289 | switch (evt->event) { | |
290 | case IB_CM_REQ_RECEIVED: | |
0b2b35f6 | 291 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
a5b74540 HR |
292 | &evt->param.req_rcvd); |
293 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; | |
b9ef520f | 294 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
a5b74540 HR |
295 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
296 | IB_UCM_PRES_ALTERNATE : 0); | |
297 | break; | |
298 | case IB_CM_REP_RECEIVED: | |
299 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, | |
300 | &evt->param.rep_rcvd); | |
301 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; | |
a5b74540 HR |
302 | break; |
303 | case IB_CM_RTU_RECEIVED: | |
304 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; | |
305 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
306 | break; |
307 | case IB_CM_DREQ_RECEIVED: | |
308 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; | |
309 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
310 | break; |
311 | case IB_CM_DREP_RECEIVED: | |
312 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; | |
313 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
314 | break; |
315 | case IB_CM_MRA_RECEIVED: | |
b9ef520f SH |
316 | uvt->resp.u.mra_resp.timeout = |
317 | evt->param.mra_rcvd.service_timeout; | |
a5b74540 | 318 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
a5b74540 HR |
319 | break; |
320 | case IB_CM_REJ_RECEIVED: | |
b9ef520f | 321 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
a5b74540 HR |
322 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
323 | uvt->info_len = evt->param.rej_rcvd.ari_length; | |
324 | info = evt->param.rej_rcvd.ari; | |
a5b74540 HR |
325 | break; |
326 | case IB_CM_LAP_RECEIVED: | |
b9ef520f SH |
327 | ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path, |
328 | evt->param.lap_rcvd.alternate_path); | |
a5b74540 | 329 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
b9ef520f | 330 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
a5b74540 HR |
331 | break; |
332 | case IB_CM_APR_RECEIVED: | |
b9ef520f | 333 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
a5b74540 HR |
334 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
335 | uvt->info_len = evt->param.apr_rcvd.info_len; | |
336 | info = evt->param.apr_rcvd.apr_info; | |
a5b74540 HR |
337 | break; |
338 | case IB_CM_SIDR_REQ_RECEIVED: | |
0b2b35f6 SH |
339 | uvt->resp.u.sidr_req_resp.pkey = |
340 | evt->param.sidr_req_rcvd.pkey; | |
07d357d0 SH |
341 | uvt->resp.u.sidr_req_resp.port = |
342 | evt->param.sidr_req_rcvd.port; | |
a5b74540 | 343 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
a5b74540 HR |
344 | break; |
345 | case IB_CM_SIDR_REP_RECEIVED: | |
346 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, | |
347 | &evt->param.sidr_rep_rcvd); | |
348 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; | |
349 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; | |
350 | info = evt->param.sidr_rep_rcvd.info; | |
a5b74540 HR |
351 | break; |
352 | default: | |
353 | uvt->resp.u.send_status = evt->param.send_status; | |
a5b74540 HR |
354 | break; |
355 | } | |
356 | ||
b9ef520f | 357 | if (uvt->data_len) { |
a5b74540 | 358 | uvt->data = kmalloc(uvt->data_len, GFP_KERNEL); |
b9ef520f SH |
359 | if (!uvt->data) |
360 | goto err1; | |
a5b74540 HR |
361 | |
362 | memcpy(uvt->data, evt->private_data, uvt->data_len); | |
363 | uvt->resp.present |= IB_UCM_PRES_DATA; | |
364 | } | |
365 | ||
b9ef520f | 366 | if (uvt->info_len) { |
a5b74540 | 367 | uvt->info = kmalloc(uvt->info_len, GFP_KERNEL); |
b9ef520f SH |
368 | if (!uvt->info) |
369 | goto err2; | |
a5b74540 HR |
370 | |
371 | memcpy(uvt->info, info, uvt->info_len); | |
372 | uvt->resp.present |= IB_UCM_PRES_INFO; | |
373 | } | |
a5b74540 | 374 | return 0; |
b9ef520f SH |
375 | |
376 | err2: | |
79d81907 | 377 | kfree(uvt->data); |
b9ef520f SH |
378 | err1: |
379 | return -ENOMEM; | |
a5b74540 HR |
380 | } |
381 | ||
382 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, | |
383 | struct ib_cm_event *event) | |
384 | { | |
385 | struct ib_ucm_event *uevent; | |
386 | struct ib_ucm_context *ctx; | |
387 | int result = 0; | |
a5b74540 | 388 | |
b9ef520f | 389 | ctx = cm_id->context; |
a5b74540 | 390 | |
de6eb66b | 391 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
b9ef520f SH |
392 | if (!uevent) |
393 | goto err1; | |
a5b74540 | 394 | |
0b2b35f6 SH |
395 | uevent->ctx = ctx; |
396 | uevent->cm_id = cm_id; | |
397 | uevent->resp.uid = ctx->uid; | |
398 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
399 | uevent->resp.event = event->event; |
400 | ||
0b2b35f6 | 401 | result = ib_ucm_event_process(event, uevent); |
a5b74540 | 402 | if (result) |
b9ef520f | 403 | goto err2; |
a5b74540 | 404 | |
a5b74540 | 405 | down(&ctx->file->mutex); |
a5b74540 HR |
406 | list_add_tail(&uevent->file_list, &ctx->file->events); |
407 | list_add_tail(&uevent->ctx_list, &ctx->events); | |
a5b74540 | 408 | wake_up_interruptible(&ctx->file->poll_wait); |
a5b74540 | 409 | up(&ctx->file->mutex); |
b9ef520f SH |
410 | return 0; |
411 | ||
412 | err2: | |
413 | kfree(uevent); | |
414 | err1: | |
415 | /* Destroy new cm_id's */ | |
0b2b35f6 | 416 | return ib_ucm_new_cm_id(event->event); |
a5b74540 HR |
417 | } |
418 | ||
419 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, | |
420 | const char __user *inbuf, | |
421 | int in_len, int out_len) | |
422 | { | |
423 | struct ib_ucm_context *ctx; | |
424 | struct ib_ucm_event_get cmd; | |
0b2b35f6 | 425 | struct ib_ucm_event *uevent; |
a5b74540 HR |
426 | int result = 0; |
427 | DEFINE_WAIT(wait); | |
428 | ||
429 | if (out_len < sizeof(struct ib_ucm_event_resp)) | |
430 | return -ENOSPC; | |
431 | ||
432 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
433 | return -EFAULT; | |
07d357d0 | 434 | |
a5b74540 | 435 | down(&file->mutex); |
a5b74540 HR |
436 | while (list_empty(&file->events)) { |
437 | ||
438 | if (file->filp->f_flags & O_NONBLOCK) { | |
439 | result = -EAGAIN; | |
440 | break; | |
441 | } | |
442 | ||
443 | if (signal_pending(current)) { | |
444 | result = -ERESTARTSYS; | |
445 | break; | |
446 | } | |
447 | ||
448 | prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE); | |
449 | ||
450 | up(&file->mutex); | |
451 | schedule(); | |
452 | down(&file->mutex); | |
453 | ||
454 | finish_wait(&file->poll_wait, &wait); | |
455 | } | |
456 | ||
457 | if (result) | |
458 | goto done; | |
459 | ||
460 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); | |
461 | ||
0b2b35f6 SH |
462 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
463 | ctx = ib_ucm_ctx_alloc(file); | |
464 | if (!ctx) { | |
465 | result = -ENOMEM; | |
466 | goto done; | |
467 | } | |
a5b74540 | 468 | |
0b2b35f6 SH |
469 | ctx->cm_id = uevent->cm_id; |
470 | ctx->cm_id->context = ctx; | |
471 | uevent->resp.id = ctx->id; | |
a5b74540 HR |
472 | } |
473 | ||
a5b74540 HR |
474 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
475 | &uevent->resp, sizeof(uevent->resp))) { | |
476 | result = -EFAULT; | |
477 | goto done; | |
478 | } | |
479 | ||
480 | if (uevent->data) { | |
a5b74540 HR |
481 | if (cmd.data_len < uevent->data_len) { |
482 | result = -ENOMEM; | |
483 | goto done; | |
484 | } | |
a5b74540 HR |
485 | if (copy_to_user((void __user *)(unsigned long)cmd.data, |
486 | uevent->data, uevent->data_len)) { | |
487 | result = -EFAULT; | |
488 | goto done; | |
489 | } | |
490 | } | |
491 | ||
492 | if (uevent->info) { | |
a5b74540 HR |
493 | if (cmd.info_len < uevent->info_len) { |
494 | result = -ENOMEM; | |
495 | goto done; | |
496 | } | |
a5b74540 HR |
497 | if (copy_to_user((void __user *)(unsigned long)cmd.info, |
498 | uevent->info, uevent->info_len)) { | |
499 | result = -EFAULT; | |
500 | goto done; | |
501 | } | |
502 | } | |
503 | ||
504 | list_del(&uevent->file_list); | |
505 | list_del(&uevent->ctx_list); | |
0b2b35f6 | 506 | uevent->ctx->events_reported++; |
a5b74540 | 507 | |
79d81907 HR |
508 | kfree(uevent->data); |
509 | kfree(uevent->info); | |
a5b74540 HR |
510 | kfree(uevent); |
511 | done: | |
512 | up(&file->mutex); | |
513 | return result; | |
514 | } | |
515 | ||
a5b74540 HR |
516 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
517 | const char __user *inbuf, | |
518 | int in_len, int out_len) | |
519 | { | |
520 | struct ib_ucm_create_id cmd; | |
521 | struct ib_ucm_create_id_resp resp; | |
522 | struct ib_ucm_context *ctx; | |
523 | int result; | |
524 | ||
525 | if (out_len < sizeof(resp)) | |
526 | return -ENOSPC; | |
527 | ||
528 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
529 | return -EFAULT; | |
530 | ||
b9ef520f | 531 | down(&file->mutex); |
a5b74540 | 532 | ctx = ib_ucm_ctx_alloc(file); |
b9ef520f | 533 | up(&file->mutex); |
a5b74540 HR |
534 | if (!ctx) |
535 | return -ENOMEM; | |
536 | ||
0b2b35f6 | 537 | ctx->uid = cmd.uid; |
07d357d0 SH |
538 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
539 | ib_ucm_event_handler, ctx); | |
b9ef520f SH |
540 | if (IS_ERR(ctx->cm_id)) { |
541 | result = PTR_ERR(ctx->cm_id); | |
07d357d0 | 542 | goto err1; |
a5b74540 HR |
543 | } |
544 | ||
545 | resp.id = ctx->id; | |
546 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
547 | &resp, sizeof(resp))) { | |
548 | result = -EFAULT; | |
07d357d0 | 549 | goto err2; |
a5b74540 | 550 | } |
a5b74540 | 551 | return 0; |
a5b74540 | 552 | |
07d357d0 SH |
553 | err2: |
554 | ib_destroy_cm_id(ctx->cm_id); | |
555 | err1: | |
95ed644f | 556 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 557 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 558 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 | 559 | kfree(ctx); |
a5b74540 HR |
560 | return result; |
561 | } | |
562 | ||
563 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, | |
564 | const char __user *inbuf, | |
565 | int in_len, int out_len) | |
566 | { | |
567 | struct ib_ucm_destroy_id cmd; | |
0b2b35f6 SH |
568 | struct ib_ucm_destroy_id_resp resp; |
569 | struct ib_ucm_context *ctx; | |
570 | int result = 0; | |
571 | ||
572 | if (out_len < sizeof(resp)) | |
573 | return -ENOSPC; | |
a5b74540 HR |
574 | |
575 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
576 | return -EFAULT; | |
577 | ||
95ed644f | 578 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 SH |
579 | ctx = idr_find(&ctx_id_table, cmd.id); |
580 | if (!ctx) | |
581 | ctx = ERR_PTR(-ENOENT); | |
582 | else if (ctx->file != file) | |
583 | ctx = ERR_PTR(-EINVAL); | |
584 | else | |
585 | idr_remove(&ctx_id_table, ctx->id); | |
95ed644f | 586 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
587 | |
588 | if (IS_ERR(ctx)) | |
589 | return PTR_ERR(ctx); | |
590 | ||
1b52fa98 SH |
591 | ib_ucm_ctx_put(ctx); |
592 | wait_for_completion(&ctx->comp); | |
0b2b35f6 SH |
593 | |
594 | /* No new events will be generated after destroying the cm_id. */ | |
595 | ib_destroy_cm_id(ctx->cm_id); | |
596 | /* Cleanup events not yet reported to the user. */ | |
597 | ib_ucm_cleanup_events(ctx); | |
598 | ||
599 | resp.events_reported = ctx->events_reported; | |
600 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
601 | &resp, sizeof(resp))) | |
602 | result = -EFAULT; | |
603 | ||
604 | kfree(ctx); | |
605 | return result; | |
a5b74540 HR |
606 | } |
607 | ||
608 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, | |
609 | const char __user *inbuf, | |
610 | int in_len, int out_len) | |
611 | { | |
612 | struct ib_ucm_attr_id_resp resp; | |
613 | struct ib_ucm_attr_id cmd; | |
614 | struct ib_ucm_context *ctx; | |
615 | int result = 0; | |
616 | ||
617 | if (out_len < sizeof(resp)) | |
618 | return -ENOSPC; | |
619 | ||
620 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
621 | return -EFAULT; | |
622 | ||
b9ef520f SH |
623 | ctx = ib_ucm_ctx_get(file, cmd.id); |
624 | if (IS_ERR(ctx)) | |
625 | return PTR_ERR(ctx); | |
a5b74540 HR |
626 | |
627 | resp.service_id = ctx->cm_id->service_id; | |
628 | resp.service_mask = ctx->cm_id->service_mask; | |
629 | resp.local_id = ctx->cm_id->local_id; | |
630 | resp.remote_id = ctx->cm_id->remote_id; | |
631 | ||
632 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
633 | &resp, sizeof(resp))) | |
634 | result = -EFAULT; | |
635 | ||
b9ef520f | 636 | ib_ucm_ctx_put(ctx); |
a5b74540 HR |
637 | return result; |
638 | } | |
639 | ||
0b2b35f6 SH |
640 | static void ib_ucm_copy_ah_attr(struct ib_ucm_ah_attr *dest_attr, |
641 | struct ib_ah_attr *src_attr) | |
642 | { | |
643 | memcpy(dest_attr->grh_dgid, src_attr->grh.dgid.raw, | |
644 | sizeof src_attr->grh.dgid); | |
645 | dest_attr->grh_flow_label = src_attr->grh.flow_label; | |
646 | dest_attr->grh_sgid_index = src_attr->grh.sgid_index; | |
647 | dest_attr->grh_hop_limit = src_attr->grh.hop_limit; | |
648 | dest_attr->grh_traffic_class = src_attr->grh.traffic_class; | |
649 | ||
650 | dest_attr->dlid = src_attr->dlid; | |
651 | dest_attr->sl = src_attr->sl; | |
652 | dest_attr->src_path_bits = src_attr->src_path_bits; | |
653 | dest_attr->static_rate = src_attr->static_rate; | |
654 | dest_attr->is_global = (src_attr->ah_flags & IB_AH_GRH); | |
655 | dest_attr->port_num = src_attr->port_num; | |
656 | } | |
657 | ||
658 | static void ib_ucm_copy_qp_attr(struct ib_ucm_init_qp_attr_resp *dest_attr, | |
659 | struct ib_qp_attr *src_attr) | |
660 | { | |
661 | dest_attr->cur_qp_state = src_attr->cur_qp_state; | |
662 | dest_attr->path_mtu = src_attr->path_mtu; | |
663 | dest_attr->path_mig_state = src_attr->path_mig_state; | |
664 | dest_attr->qkey = src_attr->qkey; | |
665 | dest_attr->rq_psn = src_attr->rq_psn; | |
666 | dest_attr->sq_psn = src_attr->sq_psn; | |
667 | dest_attr->dest_qp_num = src_attr->dest_qp_num; | |
668 | dest_attr->qp_access_flags = src_attr->qp_access_flags; | |
669 | ||
670 | dest_attr->max_send_wr = src_attr->cap.max_send_wr; | |
671 | dest_attr->max_recv_wr = src_attr->cap.max_recv_wr; | |
672 | dest_attr->max_send_sge = src_attr->cap.max_send_sge; | |
673 | dest_attr->max_recv_sge = src_attr->cap.max_recv_sge; | |
674 | dest_attr->max_inline_data = src_attr->cap.max_inline_data; | |
675 | ||
676 | ib_ucm_copy_ah_attr(&dest_attr->ah_attr, &src_attr->ah_attr); | |
677 | ib_ucm_copy_ah_attr(&dest_attr->alt_ah_attr, &src_attr->alt_ah_attr); | |
678 | ||
679 | dest_attr->pkey_index = src_attr->pkey_index; | |
680 | dest_attr->alt_pkey_index = src_attr->alt_pkey_index; | |
681 | dest_attr->en_sqd_async_notify = src_attr->en_sqd_async_notify; | |
682 | dest_attr->sq_draining = src_attr->sq_draining; | |
683 | dest_attr->max_rd_atomic = src_attr->max_rd_atomic; | |
684 | dest_attr->max_dest_rd_atomic = src_attr->max_dest_rd_atomic; | |
685 | dest_attr->min_rnr_timer = src_attr->min_rnr_timer; | |
686 | dest_attr->port_num = src_attr->port_num; | |
687 | dest_attr->timeout = src_attr->timeout; | |
688 | dest_attr->retry_cnt = src_attr->retry_cnt; | |
689 | dest_attr->rnr_retry = src_attr->rnr_retry; | |
690 | dest_attr->alt_port_num = src_attr->alt_port_num; | |
691 | dest_attr->alt_timeout = src_attr->alt_timeout; | |
692 | } | |
693 | ||
694 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, | |
695 | const char __user *inbuf, | |
696 | int in_len, int out_len) | |
697 | { | |
698 | struct ib_ucm_init_qp_attr_resp resp; | |
699 | struct ib_ucm_init_qp_attr cmd; | |
700 | struct ib_ucm_context *ctx; | |
701 | struct ib_qp_attr qp_attr; | |
702 | int result = 0; | |
703 | ||
704 | if (out_len < sizeof(resp)) | |
705 | return -ENOSPC; | |
706 | ||
707 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
708 | return -EFAULT; | |
709 | ||
710 | ctx = ib_ucm_ctx_get(file, cmd.id); | |
711 | if (IS_ERR(ctx)) | |
712 | return PTR_ERR(ctx); | |
713 | ||
714 | resp.qp_attr_mask = 0; | |
715 | memset(&qp_attr, 0, sizeof qp_attr); | |
716 | qp_attr.qp_state = cmd.qp_state; | |
717 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); | |
718 | if (result) | |
719 | goto out; | |
720 | ||
721 | ib_ucm_copy_qp_attr(&resp, &qp_attr); | |
722 | ||
723 | if (copy_to_user((void __user *)(unsigned long)cmd.response, | |
724 | &resp, sizeof(resp))) | |
725 | result = -EFAULT; | |
726 | ||
727 | out: | |
728 | ib_ucm_ctx_put(ctx); | |
729 | return result; | |
730 | } | |
731 | ||
a5b74540 HR |
732 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
733 | const char __user *inbuf, | |
734 | int in_len, int out_len) | |
735 | { | |
736 | struct ib_ucm_listen cmd; | |
737 | struct ib_ucm_context *ctx; | |
738 | int result; | |
739 | ||
740 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
741 | return -EFAULT; | |
742 | ||
b9ef520f SH |
743 | ctx = ib_ucm_ctx_get(file, cmd.id); |
744 | if (IS_ERR(ctx)) | |
745 | return PTR_ERR(ctx); | |
a5b74540 | 746 | |
b9ef520f SH |
747 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
748 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
749 | return result; |
750 | } | |
751 | ||
752 | static ssize_t ib_ucm_establish(struct ib_ucm_file *file, | |
753 | const char __user *inbuf, | |
754 | int in_len, int out_len) | |
755 | { | |
756 | struct ib_ucm_establish cmd; | |
757 | struct ib_ucm_context *ctx; | |
758 | int result; | |
759 | ||
760 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
761 | return -EFAULT; | |
762 | ||
b9ef520f SH |
763 | ctx = ib_ucm_ctx_get(file, cmd.id); |
764 | if (IS_ERR(ctx)) | |
765 | return PTR_ERR(ctx); | |
a5b74540 | 766 | |
b9ef520f SH |
767 | result = ib_cm_establish(ctx->cm_id); |
768 | ib_ucm_ctx_put(ctx); | |
a5b74540 HR |
769 | return result; |
770 | } | |
771 | ||
772 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) | |
773 | { | |
774 | void *data; | |
775 | ||
776 | *dest = NULL; | |
777 | ||
778 | if (!len) | |
779 | return 0; | |
780 | ||
781 | data = kmalloc(len, GFP_KERNEL); | |
782 | if (!data) | |
783 | return -ENOMEM; | |
784 | ||
785 | if (copy_from_user(data, (void __user *)(unsigned long)src, len)) { | |
786 | kfree(data); | |
787 | return -EFAULT; | |
788 | } | |
789 | ||
790 | *dest = data; | |
791 | return 0; | |
792 | } | |
793 | ||
794 | static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src) | |
795 | { | |
796 | struct ib_ucm_path_rec ucm_path; | |
797 | struct ib_sa_path_rec *sa_path; | |
798 | ||
799 | *path = NULL; | |
800 | ||
801 | if (!src) | |
802 | return 0; | |
803 | ||
804 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); | |
805 | if (!sa_path) | |
806 | return -ENOMEM; | |
807 | ||
808 | if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src, | |
809 | sizeof(ucm_path))) { | |
810 | ||
811 | kfree(sa_path); | |
812 | return -EFAULT; | |
813 | } | |
814 | ||
b9ef520f SH |
815 | memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid); |
816 | memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid); | |
a5b74540 HR |
817 | |
818 | sa_path->dlid = ucm_path.dlid; | |
819 | sa_path->slid = ucm_path.slid; | |
820 | sa_path->raw_traffic = ucm_path.raw_traffic; | |
821 | sa_path->flow_label = ucm_path.flow_label; | |
822 | sa_path->hop_limit = ucm_path.hop_limit; | |
823 | sa_path->traffic_class = ucm_path.traffic_class; | |
824 | sa_path->reversible = ucm_path.reversible; | |
825 | sa_path->numb_path = ucm_path.numb_path; | |
826 | sa_path->pkey = ucm_path.pkey; | |
827 | sa_path->sl = ucm_path.sl; | |
828 | sa_path->mtu_selector = ucm_path.mtu_selector; | |
829 | sa_path->mtu = ucm_path.mtu; | |
830 | sa_path->rate_selector = ucm_path.rate_selector; | |
831 | sa_path->rate = ucm_path.rate; | |
832 | sa_path->packet_life_time = ucm_path.packet_life_time; | |
833 | sa_path->preference = ucm_path.preference; | |
834 | ||
835 | sa_path->packet_life_time_selector = | |
836 | ucm_path.packet_life_time_selector; | |
837 | ||
838 | *path = sa_path; | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, | |
843 | const char __user *inbuf, | |
844 | int in_len, int out_len) | |
845 | { | |
846 | struct ib_cm_req_param param; | |
847 | struct ib_ucm_context *ctx; | |
848 | struct ib_ucm_req cmd; | |
849 | int result; | |
850 | ||
851 | param.private_data = NULL; | |
852 | param.primary_path = NULL; | |
853 | param.alternate_path = NULL; | |
854 | ||
855 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
856 | return -EFAULT; | |
857 | ||
858 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
859 | if (result) | |
860 | goto done; | |
861 | ||
862 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); | |
863 | if (result) | |
864 | goto done; | |
865 | ||
866 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); | |
867 | if (result) | |
868 | goto done; | |
869 | ||
870 | param.private_data_len = cmd.len; | |
871 | param.service_id = cmd.sid; | |
872 | param.qp_num = cmd.qpn; | |
873 | param.qp_type = cmd.qp_type; | |
874 | param.starting_psn = cmd.psn; | |
875 | param.peer_to_peer = cmd.peer_to_peer; | |
876 | param.responder_resources = cmd.responder_resources; | |
877 | param.initiator_depth = cmd.initiator_depth; | |
878 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; | |
879 | param.flow_control = cmd.flow_control; | |
880 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; | |
881 | param.retry_count = cmd.retry_count; | |
882 | param.rnr_retry_count = cmd.rnr_retry_count; | |
883 | param.max_cm_retries = cmd.max_cm_retries; | |
884 | param.srq = cmd.srq; | |
885 | ||
b9ef520f SH |
886 | ctx = ib_ucm_ctx_get(file, cmd.id); |
887 | if (!IS_ERR(ctx)) { | |
a5b74540 | 888 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
b9ef520f SH |
889 | ib_ucm_ctx_put(ctx); |
890 | } else | |
891 | result = PTR_ERR(ctx); | |
a5b74540 | 892 | |
a5b74540 | 893 | done: |
79d81907 HR |
894 | kfree(param.private_data); |
895 | kfree(param.primary_path); | |
896 | kfree(param.alternate_path); | |
a5b74540 HR |
897 | return result; |
898 | } | |
899 | ||
900 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, | |
901 | const char __user *inbuf, | |
902 | int in_len, int out_len) | |
903 | { | |
904 | struct ib_cm_rep_param param; | |
905 | struct ib_ucm_context *ctx; | |
906 | struct ib_ucm_rep cmd; | |
907 | int result; | |
908 | ||
909 | param.private_data = NULL; | |
910 | ||
911 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
912 | return -EFAULT; | |
913 | ||
914 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
915 | if (result) | |
916 | return result; | |
917 | ||
918 | param.qp_num = cmd.qpn; | |
919 | param.starting_psn = cmd.psn; | |
920 | param.private_data_len = cmd.len; | |
921 | param.responder_resources = cmd.responder_resources; | |
922 | param.initiator_depth = cmd.initiator_depth; | |
923 | param.target_ack_delay = cmd.target_ack_delay; | |
924 | param.failover_accepted = cmd.failover_accepted; | |
925 | param.flow_control = cmd.flow_control; | |
926 | param.rnr_retry_count = cmd.rnr_retry_count; | |
927 | param.srq = cmd.srq; | |
928 | ||
b9ef520f SH |
929 | ctx = ib_ucm_ctx_get(file, cmd.id); |
930 | if (!IS_ERR(ctx)) { | |
0b2b35f6 | 931 | ctx->uid = cmd.uid; |
a5b74540 | 932 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
933 | ib_ucm_ctx_put(ctx); |
934 | } else | |
935 | result = PTR_ERR(ctx); | |
a5b74540 | 936 | |
79d81907 | 937 | kfree(param.private_data); |
a5b74540 HR |
938 | return result; |
939 | } | |
940 | ||
941 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, | |
942 | const char __user *inbuf, int in_len, | |
943 | int (*func)(struct ib_cm_id *cm_id, | |
944 | const void *private_data, | |
945 | u8 private_data_len)) | |
946 | { | |
947 | struct ib_ucm_private_data cmd; | |
948 | struct ib_ucm_context *ctx; | |
949 | const void *private_data = NULL; | |
950 | int result; | |
951 | ||
952 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
953 | return -EFAULT; | |
954 | ||
955 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); | |
956 | if (result) | |
957 | return result; | |
958 | ||
b9ef520f SH |
959 | ctx = ib_ucm_ctx_get(file, cmd.id); |
960 | if (!IS_ERR(ctx)) { | |
a5b74540 | 961 | result = func(ctx->cm_id, private_data, cmd.len); |
b9ef520f SH |
962 | ib_ucm_ctx_put(ctx); |
963 | } else | |
964 | result = PTR_ERR(ctx); | |
a5b74540 | 965 | |
79d81907 | 966 | kfree(private_data); |
a5b74540 HR |
967 | return result; |
968 | } | |
969 | ||
970 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, | |
971 | const char __user *inbuf, | |
972 | int in_len, int out_len) | |
973 | { | |
974 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); | |
975 | } | |
976 | ||
977 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, | |
978 | const char __user *inbuf, | |
979 | int in_len, int out_len) | |
980 | { | |
981 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); | |
982 | } | |
983 | ||
984 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, | |
985 | const char __user *inbuf, | |
986 | int in_len, int out_len) | |
987 | { | |
988 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); | |
989 | } | |
990 | ||
991 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, | |
992 | const char __user *inbuf, int in_len, | |
993 | int (*func)(struct ib_cm_id *cm_id, | |
994 | int status, | |
995 | const void *info, | |
996 | u8 info_len, | |
997 | const void *data, | |
998 | u8 data_len)) | |
999 | { | |
1000 | struct ib_ucm_context *ctx; | |
1001 | struct ib_ucm_info cmd; | |
1002 | const void *data = NULL; | |
1003 | const void *info = NULL; | |
1004 | int result; | |
1005 | ||
1006 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1007 | return -EFAULT; | |
1008 | ||
1009 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); | |
1010 | if (result) | |
1011 | goto done; | |
1012 | ||
1013 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); | |
1014 | if (result) | |
1015 | goto done; | |
1016 | ||
b9ef520f SH |
1017 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1018 | if (!IS_ERR(ctx)) { | |
1019 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, | |
a5b74540 | 1020 | data, cmd.data_len); |
b9ef520f SH |
1021 | ib_ucm_ctx_put(ctx); |
1022 | } else | |
1023 | result = PTR_ERR(ctx); | |
a5b74540 | 1024 | |
a5b74540 | 1025 | done: |
79d81907 HR |
1026 | kfree(data); |
1027 | kfree(info); | |
a5b74540 HR |
1028 | return result; |
1029 | } | |
1030 | ||
1031 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, | |
1032 | const char __user *inbuf, | |
1033 | int in_len, int out_len) | |
1034 | { | |
1035 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); | |
1036 | } | |
1037 | ||
1038 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, | |
1039 | const char __user *inbuf, | |
1040 | int in_len, int out_len) | |
1041 | { | |
1042 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); | |
1043 | } | |
1044 | ||
1045 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, | |
1046 | const char __user *inbuf, | |
1047 | int in_len, int out_len) | |
1048 | { | |
1049 | struct ib_ucm_context *ctx; | |
1050 | struct ib_ucm_mra cmd; | |
1051 | const void *data = NULL; | |
1052 | int result; | |
1053 | ||
1054 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1055 | return -EFAULT; | |
1056 | ||
1057 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1058 | if (result) | |
1059 | return result; | |
1060 | ||
b9ef520f SH |
1061 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1062 | if (!IS_ERR(ctx)) { | |
1063 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); | |
1064 | ib_ucm_ctx_put(ctx); | |
1065 | } else | |
1066 | result = PTR_ERR(ctx); | |
a5b74540 | 1067 | |
79d81907 | 1068 | kfree(data); |
a5b74540 HR |
1069 | return result; |
1070 | } | |
1071 | ||
1072 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, | |
1073 | const char __user *inbuf, | |
1074 | int in_len, int out_len) | |
1075 | { | |
1076 | struct ib_ucm_context *ctx; | |
1077 | struct ib_sa_path_rec *path = NULL; | |
1078 | struct ib_ucm_lap cmd; | |
1079 | const void *data = NULL; | |
1080 | int result; | |
1081 | ||
1082 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1083 | return -EFAULT; | |
1084 | ||
1085 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); | |
1086 | if (result) | |
1087 | goto done; | |
1088 | ||
1089 | result = ib_ucm_path_get(&path, cmd.path); | |
1090 | if (result) | |
1091 | goto done; | |
1092 | ||
b9ef520f SH |
1093 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1094 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1095 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
b9ef520f SH |
1096 | ib_ucm_ctx_put(ctx); |
1097 | } else | |
1098 | result = PTR_ERR(ctx); | |
a5b74540 | 1099 | |
a5b74540 | 1100 | done: |
79d81907 HR |
1101 | kfree(data); |
1102 | kfree(path); | |
a5b74540 HR |
1103 | return result; |
1104 | } | |
1105 | ||
1106 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, | |
1107 | const char __user *inbuf, | |
1108 | int in_len, int out_len) | |
1109 | { | |
1110 | struct ib_cm_sidr_req_param param; | |
1111 | struct ib_ucm_context *ctx; | |
1112 | struct ib_ucm_sidr_req cmd; | |
1113 | int result; | |
1114 | ||
1115 | param.private_data = NULL; | |
1116 | param.path = NULL; | |
1117 | ||
1118 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1119 | return -EFAULT; | |
1120 | ||
1121 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); | |
1122 | if (result) | |
1123 | goto done; | |
1124 | ||
1125 | result = ib_ucm_path_get(¶m.path, cmd.path); | |
1126 | if (result) | |
1127 | goto done; | |
1128 | ||
1129 | param.private_data_len = cmd.len; | |
1130 | param.service_id = cmd.sid; | |
1131 | param.timeout_ms = cmd.timeout; | |
1132 | param.max_cm_retries = cmd.max_cm_retries; | |
1133 | param.pkey = cmd.pkey; | |
1134 | ||
b9ef520f SH |
1135 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1136 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1137 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
b9ef520f SH |
1138 | ib_ucm_ctx_put(ctx); |
1139 | } else | |
1140 | result = PTR_ERR(ctx); | |
a5b74540 | 1141 | |
a5b74540 | 1142 | done: |
79d81907 HR |
1143 | kfree(param.private_data); |
1144 | kfree(param.path); | |
a5b74540 HR |
1145 | return result; |
1146 | } | |
1147 | ||
1148 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, | |
1149 | const char __user *inbuf, | |
1150 | int in_len, int out_len) | |
1151 | { | |
1152 | struct ib_cm_sidr_rep_param param; | |
1153 | struct ib_ucm_sidr_rep cmd; | |
1154 | struct ib_ucm_context *ctx; | |
1155 | int result; | |
1156 | ||
1157 | param.info = NULL; | |
1158 | ||
1159 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) | |
1160 | return -EFAULT; | |
1161 | ||
1162 | result = ib_ucm_alloc_data(¶m.private_data, | |
1163 | cmd.data, cmd.data_len); | |
1164 | if (result) | |
1165 | goto done; | |
1166 | ||
1167 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); | |
1168 | if (result) | |
1169 | goto done; | |
1170 | ||
b9ef520f SH |
1171 | param.qp_num = cmd.qpn; |
1172 | param.qkey = cmd.qkey; | |
1173 | param.status = cmd.status; | |
1174 | param.info_length = cmd.info_len; | |
1175 | param.private_data_len = cmd.data_len; | |
a5b74540 | 1176 | |
b9ef520f SH |
1177 | ctx = ib_ucm_ctx_get(file, cmd.id); |
1178 | if (!IS_ERR(ctx)) { | |
a5b74540 | 1179 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
b9ef520f SH |
1180 | ib_ucm_ctx_put(ctx); |
1181 | } else | |
1182 | result = PTR_ERR(ctx); | |
a5b74540 | 1183 | |
a5b74540 | 1184 | done: |
79d81907 HR |
1185 | kfree(param.private_data); |
1186 | kfree(param.info); | |
a5b74540 HR |
1187 | return result; |
1188 | } | |
1189 | ||
1190 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, | |
1191 | const char __user *inbuf, | |
1192 | int in_len, int out_len) = { | |
1193 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, | |
1194 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, | |
1195 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, | |
1196 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, | |
1197 | [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish, | |
1198 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, | |
1199 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, | |
1200 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, | |
1201 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, | |
1202 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, | |
1203 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, | |
1204 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, | |
1205 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, | |
1206 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, | |
1207 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, | |
1208 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, | |
1209 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, | |
0b2b35f6 | 1210 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
a5b74540 HR |
1211 | }; |
1212 | ||
1213 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, | |
1214 | size_t len, loff_t *pos) | |
1215 | { | |
1216 | struct ib_ucm_file *file = filp->private_data; | |
1217 | struct ib_ucm_cmd_hdr hdr; | |
1218 | ssize_t result; | |
1219 | ||
1220 | if (len < sizeof(hdr)) | |
1221 | return -EINVAL; | |
1222 | ||
1223 | if (copy_from_user(&hdr, buf, sizeof(hdr))) | |
1224 | return -EFAULT; | |
1225 | ||
a5b74540 HR |
1226 | if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
1227 | return -EINVAL; | |
1228 | ||
1229 | if (hdr.in + sizeof(hdr) > len) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), | |
1233 | hdr.in, hdr.out); | |
1234 | if (!result) | |
1235 | result = len; | |
1236 | ||
1237 | return result; | |
1238 | } | |
1239 | ||
1240 | static unsigned int ib_ucm_poll(struct file *filp, | |
1241 | struct poll_table_struct *wait) | |
1242 | { | |
1243 | struct ib_ucm_file *file = filp->private_data; | |
1244 | unsigned int mask = 0; | |
1245 | ||
1246 | poll_wait(filp, &file->poll_wait, wait); | |
1247 | ||
1248 | if (!list_empty(&file->events)) | |
1249 | mask = POLLIN | POLLRDNORM; | |
1250 | ||
1251 | return mask; | |
1252 | } | |
1253 | ||
1254 | static int ib_ucm_open(struct inode *inode, struct file *filp) | |
1255 | { | |
1256 | struct ib_ucm_file *file; | |
1257 | ||
1258 | file = kmalloc(sizeof(*file), GFP_KERNEL); | |
1259 | if (!file) | |
1260 | return -ENOMEM; | |
1261 | ||
1262 | INIT_LIST_HEAD(&file->events); | |
1263 | INIT_LIST_HEAD(&file->ctxs); | |
1264 | init_waitqueue_head(&file->poll_wait); | |
1265 | ||
1266 | init_MUTEX(&file->mutex); | |
1267 | ||
1268 | filp->private_data = file; | |
1269 | file->filp = filp; | |
07d357d0 | 1270 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev); |
a5b74540 | 1271 | |
a5b74540 HR |
1272 | return 0; |
1273 | } | |
1274 | ||
1275 | static int ib_ucm_close(struct inode *inode, struct file *filp) | |
1276 | { | |
1277 | struct ib_ucm_file *file = filp->private_data; | |
1278 | struct ib_ucm_context *ctx; | |
1279 | ||
1280 | down(&file->mutex); | |
a5b74540 | 1281 | while (!list_empty(&file->ctxs)) { |
a5b74540 HR |
1282 | ctx = list_entry(file->ctxs.next, |
1283 | struct ib_ucm_context, file_list); | |
b9ef520f | 1284 | up(&file->mutex); |
0b2b35f6 | 1285 | |
95ed644f | 1286 | mutex_lock(&ctx_id_mutex); |
0b2b35f6 | 1287 | idr_remove(&ctx_id_table, ctx->id); |
95ed644f | 1288 | mutex_unlock(&ctx_id_mutex); |
0b2b35f6 SH |
1289 | |
1290 | ib_destroy_cm_id(ctx->cm_id); | |
1291 | ib_ucm_cleanup_events(ctx); | |
1292 | kfree(ctx); | |
1293 | ||
a5b74540 HR |
1294 | down(&file->mutex); |
1295 | } | |
a5b74540 | 1296 | up(&file->mutex); |
a5b74540 | 1297 | kfree(file); |
a5b74540 HR |
1298 | return 0; |
1299 | } | |
1300 | ||
07d357d0 SH |
1301 | static void ib_ucm_release_class_dev(struct class_device *class_dev) |
1302 | { | |
1303 | struct ib_ucm_device *dev; | |
1304 | ||
1305 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1306 | cdev_del(&dev->dev); | |
1307 | clear_bit(dev->devnum, dev_map); | |
1308 | kfree(dev); | |
1309 | } | |
1310 | ||
1311 | static struct file_operations ucm_fops = { | |
a5b74540 HR |
1312 | .owner = THIS_MODULE, |
1313 | .open = ib_ucm_open, | |
1314 | .release = ib_ucm_close, | |
1315 | .write = ib_ucm_write, | |
1316 | .poll = ib_ucm_poll, | |
1317 | }; | |
1318 | ||
07d357d0 SH |
1319 | static struct class ucm_class = { |
1320 | .name = "infiniband_cm", | |
1321 | .release = ib_ucm_release_class_dev | |
1322 | }; | |
1323 | ||
07d357d0 SH |
1324 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) |
1325 | { | |
1326 | struct ib_ucm_device *dev; | |
1327 | ||
1328 | dev = container_of(class_dev, struct ib_ucm_device, class_dev); | |
1329 | return sprintf(buf, "%s\n", dev->ib_dev->name); | |
1330 | } | |
1331 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
a5b74540 | 1332 | |
07d357d0 | 1333 | static void ib_ucm_add_one(struct ib_device *device) |
a5b74540 | 1334 | { |
07d357d0 | 1335 | struct ib_ucm_device *ucm_dev; |
a5b74540 | 1336 | |
07d357d0 SH |
1337 | if (!device->alloc_ucontext) |
1338 | return; | |
1339 | ||
de6eb66b | 1340 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
07d357d0 SH |
1341 | if (!ucm_dev) |
1342 | return; | |
a5b74540 | 1343 | |
07d357d0 | 1344 | ucm_dev->ib_dev = device; |
a5b74540 | 1345 | |
07d357d0 SH |
1346 | ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
1347 | if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES) | |
1348 | goto err; | |
1349 | ||
1350 | set_bit(ucm_dev->devnum, dev_map); | |
1351 | ||
1352 | cdev_init(&ucm_dev->dev, &ucm_fops); | |
1353 | ucm_dev->dev.owner = THIS_MODULE; | |
1354 | kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum); | |
1355 | if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1)) | |
1356 | goto err; | |
1357 | ||
1358 | ucm_dev->class_dev.class = &ucm_class; | |
1359 | ucm_dev->class_dev.dev = device->dma_device; | |
68f5f996 | 1360 | ucm_dev->class_dev.devt = ucm_dev->dev.dev; |
07d357d0 SH |
1361 | snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d", |
1362 | ucm_dev->devnum); | |
1363 | if (class_device_register(&ucm_dev->class_dev)) | |
a5b74540 | 1364 | goto err_cdev; |
a5b74540 | 1365 | |
07d357d0 SH |
1366 | if (class_device_create_file(&ucm_dev->class_dev, |
1367 | &class_device_attr_ibdev)) | |
a5b74540 | 1368 | goto err_class; |
07d357d0 SH |
1369 | |
1370 | ib_set_client_data(device, &ucm_client, ucm_dev); | |
1371 | return; | |
1372 | ||
1373 | err_class: | |
1374 | class_device_unregister(&ucm_dev->class_dev); | |
1375 | err_cdev: | |
1376 | cdev_del(&ucm_dev->dev); | |
1377 | clear_bit(ucm_dev->devnum, dev_map); | |
1378 | err: | |
1379 | kfree(ucm_dev); | |
1380 | return; | |
1381 | } | |
1382 | ||
1383 | static void ib_ucm_remove_one(struct ib_device *device) | |
1384 | { | |
1385 | struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client); | |
1386 | ||
1387 | if (!ucm_dev) | |
1388 | return; | |
1389 | ||
1390 | class_device_unregister(&ucm_dev->class_dev); | |
1391 | } | |
1392 | ||
1393 | static ssize_t show_abi_version(struct class *class, char *buf) | |
1394 | { | |
1395 | return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION); | |
1396 | } | |
1397 | static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); | |
1398 | ||
1399 | static int __init ib_ucm_init(void) | |
1400 | { | |
1401 | int ret; | |
1402 | ||
1403 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES, | |
1404 | "infiniband_cm"); | |
1405 | if (ret) { | |
1406 | printk(KERN_ERR "ucm: couldn't register device number\n"); | |
1407 | goto err; | |
a5b74540 HR |
1408 | } |
1409 | ||
07d357d0 SH |
1410 | ret = class_register(&ucm_class); |
1411 | if (ret) { | |
1412 | printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n"); | |
1413 | goto err_chrdev; | |
1414 | } | |
a5b74540 | 1415 | |
07d357d0 SH |
1416 | ret = class_create_file(&ucm_class, &class_attr_abi_version); |
1417 | if (ret) { | |
1418 | printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); | |
1419 | goto err_class; | |
1420 | } | |
a5b74540 | 1421 | |
07d357d0 SH |
1422 | ret = ib_register_client(&ucm_client); |
1423 | if (ret) { | |
1424 | printk(KERN_ERR "ucm: couldn't register client\n"); | |
1425 | goto err_class; | |
1426 | } | |
a5b74540 | 1427 | return 0; |
07d357d0 | 1428 | |
a5b74540 | 1429 | err_class: |
07d357d0 SH |
1430 | class_unregister(&ucm_class); |
1431 | err_chrdev: | |
1432 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
1433 | err: | |
1434 | return ret; | |
a5b74540 HR |
1435 | } |
1436 | ||
1437 | static void __exit ib_ucm_cleanup(void) | |
1438 | { | |
07d357d0 SH |
1439 | ib_unregister_client(&ucm_client); |
1440 | class_unregister(&ucm_class); | |
1441 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); | |
5d7edb3c | 1442 | idr_destroy(&ctx_id_table); |
a5b74540 HR |
1443 | } |
1444 | ||
1445 | module_init(ib_ucm_init); | |
1446 | module_exit(ib_ucm_cleanup); |