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Manual merge of for-linus to upstream (fix conflicts in drivers/infiniband/core/ucm.c)
[linux-2.6/x86.git] / drivers / infiniband / core / ucm.c
blob28477565ecba8df54012a0562cee7a0eec78b6ef
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
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 */
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>
41 #include <linux/file.h>
42 #include <linux/mount.h>
43 #include <linux/cdev.h>
44 #include <linux/idr.h>
45
46 #include <asm/uaccess.h>
47
48 #include <rdma/ib_cm.h>
49 #include <rdma/ib_user_cm.h>
50
51 MODULE_AUTHOR("Libor Michalek");
52 MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
53 MODULE_LICENSE("Dual BSD/GPL");
54
55 struct ib_ucm_device {
56 int devnum;
57 struct cdev dev;
58 struct class_device class_dev;
59 struct ib_device *ib_dev;
60 };
61
62 struct ib_ucm_file {
63 struct semaphore mutex;
64 struct file *filp;
65 struct ib_ucm_device *device;
66
67 struct list_head ctxs;
68 struct list_head events;
69 wait_queue_head_t poll_wait;
70 };
71
72 struct ib_ucm_context {
73 int id;
74 wait_queue_head_t wait;
75 atomic_t ref;
76 int events_reported;
77
78 struct ib_ucm_file *file;
79 struct ib_cm_id *cm_id;
80 __u64 uid;
81
82 struct list_head events; /* list of pending events. */
83 struct list_head file_list; /* member in file ctx list */
84 };
85
86 struct ib_ucm_event {
87 struct ib_ucm_context *ctx;
88 struct list_head file_list; /* member in file event list */
89 struct list_head ctx_list; /* member in ctx event list */
90
91 struct ib_cm_id *cm_id;
92 struct ib_ucm_event_resp resp;
93 void *data;
94 void *info;
95 int data_len;
96 int info_len;
97 };
98
99 enum {
100 IB_UCM_MAJOR = 231,
101 IB_UCM_BASE_MINOR = 224,
102 IB_UCM_MAX_DEVICES = 32
103 };
104
105 #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
106
107 static void ib_ucm_add_one(struct ib_device *device);
108 static void ib_ucm_remove_one(struct ib_device *device);
109
110 static struct ib_client ucm_client = {
111 .name = "ucm",
112 .add = ib_ucm_add_one,
113 .remove = ib_ucm_remove_one
114 };
115
116 static DECLARE_MUTEX(ctx_id_mutex);
117 static DEFINE_IDR(ctx_id_table);
118 static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
119
120 static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
121 {
122 struct ib_ucm_context *ctx;
123
124 down(&ctx_id_mutex);
125 ctx = idr_find(&ctx_id_table, id);
126 if (!ctx)
127 ctx = ERR_PTR(-ENOENT);
128 else if (ctx->file != file)
129 ctx = ERR_PTR(-EINVAL);
130 else
131 atomic_inc(&ctx->ref);
132 up(&ctx_id_mutex);
133
134 return ctx;
135 }
136
137 static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
138 {
139 if (atomic_dec_and_test(&ctx->ref))
140 wake_up(&ctx->wait);
141 }
142
143 static inline int ib_ucm_new_cm_id(int event)
144 {
145 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED;
146 }
147
148 static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
149 {
150 struct ib_ucm_event *uevent;
151
152 down(&ctx->file->mutex);
153 list_del(&ctx->file_list);
154 while (!list_empty(&ctx->events)) {
155
156 uevent = list_entry(ctx->events.next,
157 struct ib_ucm_event, ctx_list);
158 list_del(&uevent->file_list);
159 list_del(&uevent->ctx_list);
160
161 /* clear incoming connections. */
162 if (ib_ucm_new_cm_id(uevent->resp.event))
163 ib_destroy_cm_id(uevent->cm_id);
164
165 kfree(uevent);
166 }
167 up(&ctx->file->mutex);
168 }
169
170 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
171 {
172 struct ib_ucm_context *ctx;
173 int result;
174
175 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
176 if (!ctx)
177 return NULL;
178
179 memset(ctx, 0, sizeof *ctx);
180 atomic_set(&ctx->ref, 1);
181 init_waitqueue_head(&ctx->wait);
182 ctx->file = file;
183 INIT_LIST_HEAD(&ctx->events);
184
185 do {
186 result = idr_pre_get(&ctx_id_table, GFP_KERNEL);
187 if (!result)
188 goto error;
189
190 down(&ctx_id_mutex);
191 result = idr_get_new(&ctx_id_table, ctx, &ctx->id);
192 up(&ctx_id_mutex);
193 } while (result == -EAGAIN);
194
195 if (result)
196 goto error;
197
198 list_add_tail(&ctx->file_list, &file->ctxs);
199 return ctx;
200
201 error:
202 kfree(ctx);
203 return NULL;
204 }
205
206 static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath,
207 struct ib_sa_path_rec *kpath)
208 {
209 if (!kpath || !upath)
210 return;
211
212 memcpy(upath->dgid, kpath->dgid.raw, sizeof *upath->dgid);
213 memcpy(upath->sgid, kpath->sgid.raw, sizeof *upath->sgid);
214
215 upath->dlid = kpath->dlid;
216 upath->slid = kpath->slid;
217 upath->raw_traffic = kpath->raw_traffic;
218 upath->flow_label = kpath->flow_label;
219 upath->hop_limit = kpath->hop_limit;
220 upath->traffic_class = kpath->traffic_class;
221 upath->reversible = kpath->reversible;
222 upath->numb_path = kpath->numb_path;
223 upath->pkey = kpath->pkey;
224 upath->sl = kpath->sl;
225 upath->mtu_selector = kpath->mtu_selector;
226 upath->mtu = kpath->mtu;
227 upath->rate_selector = kpath->rate_selector;
228 upath->rate = kpath->rate;
229 upath->packet_life_time = kpath->packet_life_time;
230 upath->preference = kpath->preference;
231
232 upath->packet_life_time_selector =
233 kpath->packet_life_time_selector;
234 }
235
236 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
237 struct ib_cm_req_event_param *kreq)
238 {
239 ureq->remote_ca_guid = kreq->remote_ca_guid;
240 ureq->remote_qkey = kreq->remote_qkey;
241 ureq->remote_qpn = kreq->remote_qpn;
242 ureq->qp_type = kreq->qp_type;
243 ureq->starting_psn = kreq->starting_psn;
244 ureq->responder_resources = kreq->responder_resources;
245 ureq->initiator_depth = kreq->initiator_depth;
246 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
247 ureq->flow_control = kreq->flow_control;
248 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
249 ureq->retry_count = kreq->retry_count;
250 ureq->rnr_retry_count = kreq->rnr_retry_count;
251 ureq->srq = kreq->srq;
252 ureq->port = kreq->port;
253
254 ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path);
255 ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path);
256 }
257
258 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
259 struct ib_cm_rep_event_param *krep)
260 {
261 urep->remote_ca_guid = krep->remote_ca_guid;
262 urep->remote_qkey = krep->remote_qkey;
263 urep->remote_qpn = krep->remote_qpn;
264 urep->starting_psn = krep->starting_psn;
265 urep->responder_resources = krep->responder_resources;
266 urep->initiator_depth = krep->initiator_depth;
267 urep->target_ack_delay = krep->target_ack_delay;
268 urep->failover_accepted = krep->failover_accepted;
269 urep->flow_control = krep->flow_control;
270 urep->rnr_retry_count = krep->rnr_retry_count;
271 urep->srq = krep->srq;
272 }
273
274 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
275 struct ib_cm_sidr_rep_event_param *krep)
276 {
277 urep->status = krep->status;
278 urep->qkey = krep->qkey;
279 urep->qpn = krep->qpn;
280 };
281
282 static int ib_ucm_event_process(struct ib_cm_event *evt,
283 struct ib_ucm_event *uvt)
284 {
285 void *info = NULL;
286
287 switch (evt->event) {
288 case IB_CM_REQ_RECEIVED:
289 ib_ucm_event_req_get(&uvt->resp.u.req_resp,
290 &evt->param.req_rcvd);
291 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
292 uvt->resp.present = IB_UCM_PRES_PRIMARY;
293 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
294 IB_UCM_PRES_ALTERNATE : 0);
295 break;
296 case IB_CM_REP_RECEIVED:
297 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
298 &evt->param.rep_rcvd);
299 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
300 break;
301 case IB_CM_RTU_RECEIVED:
302 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
303 uvt->resp.u.send_status = evt->param.send_status;
304 break;
305 case IB_CM_DREQ_RECEIVED:
306 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
307 uvt->resp.u.send_status = evt->param.send_status;
308 break;
309 case IB_CM_DREP_RECEIVED:
310 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
311 uvt->resp.u.send_status = evt->param.send_status;
312 break;
313 case IB_CM_MRA_RECEIVED:
314 uvt->resp.u.mra_resp.timeout =
315 evt->param.mra_rcvd.service_timeout;
316 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
317 break;
318 case IB_CM_REJ_RECEIVED:
319 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason;
320 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
321 uvt->info_len = evt->param.rej_rcvd.ari_length;
322 info = evt->param.rej_rcvd.ari;
323 break;
324 case IB_CM_LAP_RECEIVED:
325 ib_ucm_event_path_get(&uvt->resp.u.lap_resp.path,
326 evt->param.lap_rcvd.alternate_path);
327 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
328 uvt->resp.present = IB_UCM_PRES_ALTERNATE;
329 break;
330 case IB_CM_APR_RECEIVED:
331 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status;
332 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
333 uvt->info_len = evt->param.apr_rcvd.info_len;
334 info = evt->param.apr_rcvd.apr_info;
335 break;
336 case IB_CM_SIDR_REQ_RECEIVED:
337 uvt->resp.u.sidr_req_resp.pkey =
338 evt->param.sidr_req_rcvd.pkey;
339 uvt->resp.u.sidr_req_resp.port =
340 evt->param.sidr_req_rcvd.port;
341 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
342 break;
343 case IB_CM_SIDR_REP_RECEIVED:
344 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
345 &evt->param.sidr_rep_rcvd);
346 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
347 uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
348 info = evt->param.sidr_rep_rcvd.info;
349 break;
350 default:
351 uvt->resp.u.send_status = evt->param.send_status;
352 break;
353 }
354
355 if (uvt->data_len) {
356 uvt->data = kmalloc(uvt->data_len, GFP_KERNEL);
357 if (!uvt->data)
358 goto err1;
359
360 memcpy(uvt->data, evt->private_data, uvt->data_len);
361 uvt->resp.present |= IB_UCM_PRES_DATA;
362 }
363
364 if (uvt->info_len) {
365 uvt->info = kmalloc(uvt->info_len, GFP_KERNEL);
366 if (!uvt->info)
367 goto err2;
368
369 memcpy(uvt->info, info, uvt->info_len);
370 uvt->resp.present |= IB_UCM_PRES_INFO;
371 }
372 return 0;
373
374 err2:
375 kfree(uvt->data);
376 err1:
377 return -ENOMEM;
378 }
379
380 static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
381 struct ib_cm_event *event)
382 {
383 struct ib_ucm_event *uevent;
384 struct ib_ucm_context *ctx;
385 int result = 0;
386
387 ctx = cm_id->context;
388
389 uevent = kmalloc(sizeof(*uevent), GFP_KERNEL);
390 if (!uevent)
391 goto err1;
392
393 memset(uevent, 0, sizeof(*uevent));
394 uevent->ctx = ctx;
395 uevent->cm_id = cm_id;
396 uevent->resp.uid = ctx->uid;
397 uevent->resp.id = ctx->id;
398 uevent->resp.event = event->event;
399
400 result = ib_ucm_event_process(event, uevent);
401 if (result)
402 goto err2;
403
404 down(&ctx->file->mutex);
405 list_add_tail(&uevent->file_list, &ctx->file->events);
406 list_add_tail(&uevent->ctx_list, &ctx->events);
407 wake_up_interruptible(&ctx->file->poll_wait);
408 up(&ctx->file->mutex);
409 return 0;
410
411 err2:
412 kfree(uevent);
413 err1:
414 /* Destroy new cm_id's */
415 return ib_ucm_new_cm_id(event->event);
416 }
417
418 static ssize_t ib_ucm_event(struct ib_ucm_file *file,
419 const char __user *inbuf,
420 int in_len, int out_len)
421 {
422 struct ib_ucm_context *ctx;
423 struct ib_ucm_event_get cmd;
424 struct ib_ucm_event *uevent;
425 int result = 0;
426 DEFINE_WAIT(wait);
427
428 if (out_len < sizeof(struct ib_ucm_event_resp))
429 return -ENOSPC;
430
431 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
432 return -EFAULT;
433
434 down(&file->mutex);
435 while (list_empty(&file->events)) {
436
437 if (file->filp->f_flags & O_NONBLOCK) {
438 result = -EAGAIN;
439 break;
440 }
441
442 if (signal_pending(current)) {
443 result = -ERESTARTSYS;
444 break;
445 }
446
447 prepare_to_wait(&file->poll_wait, &wait, TASK_INTERRUPTIBLE);
448
449 up(&file->mutex);
450 schedule();
451 down(&file->mutex);
452
453 finish_wait(&file->poll_wait, &wait);
454 }
455
456 if (result)
457 goto done;
458
459 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
460
461 if (ib_ucm_new_cm_id(uevent->resp.event)) {
462 ctx = ib_ucm_ctx_alloc(file);
463 if (!ctx) {
464 result = -ENOMEM;
465 goto done;
466 }
467
468 ctx->cm_id = uevent->cm_id;
469 ctx->cm_id->context = ctx;
470 uevent->resp.id = ctx->id;
471 }
472
473 if (copy_to_user((void __user *)(unsigned long)cmd.response,
474 &uevent->resp, sizeof(uevent->resp))) {
475 result = -EFAULT;
476 goto done;
477 }
478
479 if (uevent->data) {
480 if (cmd.data_len < uevent->data_len) {
481 result = -ENOMEM;
482 goto done;
483 }
484 if (copy_to_user((void __user *)(unsigned long)cmd.data,
485 uevent->data, uevent->data_len)) {
486 result = -EFAULT;
487 goto done;
488 }
489 }
490
491 if (uevent->info) {
492 if (cmd.info_len < uevent->info_len) {
493 result = -ENOMEM;
494 goto done;
495 }
496 if (copy_to_user((void __user *)(unsigned long)cmd.info,
497 uevent->info, uevent->info_len)) {
498 result = -EFAULT;
499 goto done;
500 }
501 }
502
503 list_del(&uevent->file_list);
504 list_del(&uevent->ctx_list);
505 uevent->ctx->events_reported++;
506
507 kfree(uevent->data);
508 kfree(uevent->info);
509 kfree(uevent);
510 done:
511 up(&file->mutex);
512 return result;
513 }
514
515 static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
516 const char __user *inbuf,
517 int in_len, int out_len)
518 {
519 struct ib_ucm_create_id cmd;
520 struct ib_ucm_create_id_resp resp;
521 struct ib_ucm_context *ctx;
522 int result;
523
524 if (out_len < sizeof(resp))
525 return -ENOSPC;
526
527 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
528 return -EFAULT;
529
530 down(&file->mutex);
531 ctx = ib_ucm_ctx_alloc(file);
532 up(&file->mutex);
533 if (!ctx)
534 return -ENOMEM;
535
536 ctx->uid = cmd.uid;
537 ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
538 ib_ucm_event_handler, ctx);
539 if (IS_ERR(ctx->cm_id)) {
540 result = PTR_ERR(ctx->cm_id);
541 goto err1;
542 }
543
544 resp.id = ctx->id;
545 if (copy_to_user((void __user *)(unsigned long)cmd.response,
546 &resp, sizeof(resp))) {
547 result = -EFAULT;
548 goto err2;
549 }
550 return 0;
551
552 err2:
553 ib_destroy_cm_id(ctx->cm_id);
554 err1:
555 down(&ctx_id_mutex);
556 idr_remove(&ctx_id_table, ctx->id);
557 up(&ctx_id_mutex);
558 kfree(ctx);
559 return result;
560 }
561
562 static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
563 const char __user *inbuf,
564 int in_len, int out_len)
565 {
566 struct ib_ucm_destroy_id cmd;
567 struct ib_ucm_destroy_id_resp resp;
568 struct ib_ucm_context *ctx;
569 int result = 0;
570
571 if (out_len < sizeof(resp))
572 return -ENOSPC;
573
574 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
575 return -EFAULT;
576
577 down(&ctx_id_mutex);
578 ctx = idr_find(&ctx_id_table, cmd.id);
579 if (!ctx)
580 ctx = ERR_PTR(-ENOENT);
581 else if (ctx->file != file)
582 ctx = ERR_PTR(-EINVAL);
583 else
584 idr_remove(&ctx_id_table, ctx->id);
585 up(&ctx_id_mutex);
586
587 if (IS_ERR(ctx))
588 return PTR_ERR(ctx);
589
590 atomic_dec(&ctx->ref);
591 wait_event(ctx->wait, !atomic_read(&ctx->ref));
592
593 /* No new events will be generated after destroying the cm_id. */
594 ib_destroy_cm_id(ctx->cm_id);
595 /* Cleanup events not yet reported to the user. */
596 ib_ucm_cleanup_events(ctx);
597
598 resp.events_reported = ctx->events_reported;
599 if (copy_to_user((void __user *)(unsigned long)cmd.response,
600 &resp, sizeof(resp)))
601 result = -EFAULT;
602
603 kfree(ctx);
604 return result;
605 }
606
607 static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
608 const char __user *inbuf,
609 int in_len, int out_len)
610 {
611 struct ib_ucm_attr_id_resp resp;
612 struct ib_ucm_attr_id cmd;
613 struct ib_ucm_context *ctx;
614 int result = 0;
615
616 if (out_len < sizeof(resp))
617 return -ENOSPC;
618
619 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
620 return -EFAULT;
621
622 ctx = ib_ucm_ctx_get(file, cmd.id);
623 if (IS_ERR(ctx))
624 return PTR_ERR(ctx);
625
626 resp.service_id = ctx->cm_id->service_id;
627 resp.service_mask = ctx->cm_id->service_mask;
628 resp.local_id = ctx->cm_id->local_id;
629 resp.remote_id = ctx->cm_id->remote_id;
630
631 if (copy_to_user((void __user *)(unsigned long)cmd.response,
632 &resp, sizeof(resp)))
633 result = -EFAULT;
634
635 ib_ucm_ctx_put(ctx);
636 return result;
637 }
638
639 static void ib_ucm_copy_ah_attr(struct ib_ucm_ah_attr *dest_attr,
640 struct ib_ah_attr *src_attr)
641 {
642 memcpy(dest_attr->grh_dgid, src_attr->grh.dgid.raw,
643 sizeof src_attr->grh.dgid);
644 dest_attr->grh_flow_label = src_attr->grh.flow_label;
645 dest_attr->grh_sgid_index = src_attr->grh.sgid_index;
646 dest_attr->grh_hop_limit = src_attr->grh.hop_limit;
647 dest_attr->grh_traffic_class = src_attr->grh.traffic_class;
648
649 dest_attr->dlid = src_attr->dlid;
650 dest_attr->sl = src_attr->sl;
651 dest_attr->src_path_bits = src_attr->src_path_bits;
652 dest_attr->static_rate = src_attr->static_rate;
653 dest_attr->is_global = (src_attr->ah_flags & IB_AH_GRH);
654 dest_attr->port_num = src_attr->port_num;
655 }
656
657 static void ib_ucm_copy_qp_attr(struct ib_ucm_init_qp_attr_resp *dest_attr,
658 struct ib_qp_attr *src_attr)
659 {
660 dest_attr->cur_qp_state = src_attr->cur_qp_state;
661 dest_attr->path_mtu = src_attr->path_mtu;
662 dest_attr->path_mig_state = src_attr->path_mig_state;
663 dest_attr->qkey = src_attr->qkey;
664 dest_attr->rq_psn = src_attr->rq_psn;
665 dest_attr->sq_psn = src_attr->sq_psn;
666 dest_attr->dest_qp_num = src_attr->dest_qp_num;
667 dest_attr->qp_access_flags = src_attr->qp_access_flags;
668
669 dest_attr->max_send_wr = src_attr->cap.max_send_wr;
670 dest_attr->max_recv_wr = src_attr->cap.max_recv_wr;
671 dest_attr->max_send_sge = src_attr->cap.max_send_sge;
672 dest_attr->max_recv_sge = src_attr->cap.max_recv_sge;
673 dest_attr->max_inline_data = src_attr->cap.max_inline_data;
674
675 ib_ucm_copy_ah_attr(&dest_attr->ah_attr, &src_attr->ah_attr);
676 ib_ucm_copy_ah_attr(&dest_attr->alt_ah_attr, &src_attr->alt_ah_attr);
677
678 dest_attr->pkey_index = src_attr->pkey_index;
679 dest_attr->alt_pkey_index = src_attr->alt_pkey_index;
680 dest_attr->en_sqd_async_notify = src_attr->en_sqd_async_notify;
681 dest_attr->sq_draining = src_attr->sq_draining;
682 dest_attr->max_rd_atomic = src_attr->max_rd_atomic;
683 dest_attr->max_dest_rd_atomic = src_attr->max_dest_rd_atomic;
684 dest_attr->min_rnr_timer = src_attr->min_rnr_timer;
685 dest_attr->port_num = src_attr->port_num;
686 dest_attr->timeout = src_attr->timeout;
687 dest_attr->retry_cnt = src_attr->retry_cnt;
688 dest_attr->rnr_retry = src_attr->rnr_retry;
689 dest_attr->alt_port_num = src_attr->alt_port_num;
690 dest_attr->alt_timeout = src_attr->alt_timeout;
691 }
692
693 static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
694 const char __user *inbuf,
695 int in_len, int out_len)
696 {
697 struct ib_ucm_init_qp_attr_resp resp;
698 struct ib_ucm_init_qp_attr cmd;
699 struct ib_ucm_context *ctx;
700 struct ib_qp_attr qp_attr;
701 int result = 0;
702
703 if (out_len < sizeof(resp))
704 return -ENOSPC;
705
706 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
707 return -EFAULT;
708
709 ctx = ib_ucm_ctx_get(file, cmd.id);
710 if (IS_ERR(ctx))
711 return PTR_ERR(ctx);
712
713 resp.qp_attr_mask = 0;
714 memset(&qp_attr, 0, sizeof qp_attr);
715 qp_attr.qp_state = cmd.qp_state;
716 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
717 if (result)
718 goto out;
719
720 ib_ucm_copy_qp_attr(&resp, &qp_attr);
721
722 if (copy_to_user((void __user *)(unsigned long)cmd.response,
723 &resp, sizeof(resp)))
724 result = -EFAULT;
725
726 out:
727 ib_ucm_ctx_put(ctx);
728 return result;
729 }
730
731 static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
732 const char __user *inbuf,
733 int in_len, int out_len)
734 {
735 struct ib_ucm_listen cmd;
736 struct ib_ucm_context *ctx;
737 int result;
738
739 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
740 return -EFAULT;
741
742 ctx = ib_ucm_ctx_get(file, cmd.id);
743 if (IS_ERR(ctx))
744 return PTR_ERR(ctx);
745
746 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask);
747 ib_ucm_ctx_put(ctx);
748 return result;
749 }
750
751 static ssize_t ib_ucm_establish(struct ib_ucm_file *file,
752 const char __user *inbuf,
753 int in_len, int out_len)
754 {
755 struct ib_ucm_establish cmd;
756 struct ib_ucm_context *ctx;
757 int result;
758
759 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
760 return -EFAULT;
761
762 ctx = ib_ucm_ctx_get(file, cmd.id);
763 if (IS_ERR(ctx))
764 return PTR_ERR(ctx);
765
766 result = ib_cm_establish(ctx->cm_id);
767 ib_ucm_ctx_put(ctx);
768 return result;
769 }
770
771 static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
772 {
773 void *data;
774
775 *dest = NULL;
776
777 if (!len)
778 return 0;
779
780 data = kmalloc(len, GFP_KERNEL);
781 if (!data)
782 return -ENOMEM;
783
784 if (copy_from_user(data, (void __user *)(unsigned long)src, len)) {
785 kfree(data);
786 return -EFAULT;
787 }
788
789 *dest = data;
790 return 0;
791 }
792
793 static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src)
794 {
795 struct ib_ucm_path_rec ucm_path;
796 struct ib_sa_path_rec *sa_path;
797
798 *path = NULL;
799
800 if (!src)
801 return 0;
802
803 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
804 if (!sa_path)
805 return -ENOMEM;
806
807 if (copy_from_user(&ucm_path, (void __user *)(unsigned long)src,
808 sizeof(ucm_path))) {
809
810 kfree(sa_path);
811 return -EFAULT;
812 }
813
814 memcpy(sa_path->dgid.raw, ucm_path.dgid, sizeof sa_path->dgid);
815 memcpy(sa_path->sgid.raw, ucm_path.sgid, sizeof sa_path->sgid);
816
817 sa_path->dlid = ucm_path.dlid;
818 sa_path->slid = ucm_path.slid;
819 sa_path->raw_traffic = ucm_path.raw_traffic;
820 sa_path->flow_label = ucm_path.flow_label;
821 sa_path->hop_limit = ucm_path.hop_limit;
822 sa_path->traffic_class = ucm_path.traffic_class;
823 sa_path->reversible = ucm_path.reversible;
824 sa_path->numb_path = ucm_path.numb_path;
825 sa_path->pkey = ucm_path.pkey;
826 sa_path->sl = ucm_path.sl;
827 sa_path->mtu_selector = ucm_path.mtu_selector;
828 sa_path->mtu = ucm_path.mtu;
829 sa_path->rate_selector = ucm_path.rate_selector;
830 sa_path->rate = ucm_path.rate;
831 sa_path->packet_life_time = ucm_path.packet_life_time;
832 sa_path->preference = ucm_path.preference;
833
834 sa_path->packet_life_time_selector =
835 ucm_path.packet_life_time_selector;
836
837 *path = sa_path;
838 return 0;
839 }
840
841 static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
842 const char __user *inbuf,
843 int in_len, int out_len)
844 {
845 struct ib_cm_req_param param;
846 struct ib_ucm_context *ctx;
847 struct ib_ucm_req cmd;
848 int result;
849
850 param.private_data = NULL;
851 param.primary_path = NULL;
852 param.alternate_path = NULL;
853
854 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
855 return -EFAULT;
856
857 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
858 if (result)
859 goto done;
860
861 result = ib_ucm_path_get(&param.primary_path, cmd.primary_path);
862 if (result)
863 goto done;
864
865 result = ib_ucm_path_get(&param.alternate_path, cmd.alternate_path);
866 if (result)
867 goto done;
868
869 param.private_data_len = cmd.len;
870 param.service_id = cmd.sid;
871 param.qp_num = cmd.qpn;
872 param.qp_type = cmd.qp_type;
873 param.starting_psn = cmd.psn;
874 param.peer_to_peer = cmd.peer_to_peer;
875 param.responder_resources = cmd.responder_resources;
876 param.initiator_depth = cmd.initiator_depth;
877 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
878 param.flow_control = cmd.flow_control;
879 param.local_cm_response_timeout = cmd.local_cm_response_timeout;
880 param.retry_count = cmd.retry_count;
881 param.rnr_retry_count = cmd.rnr_retry_count;
882 param.max_cm_retries = cmd.max_cm_retries;
883 param.srq = cmd.srq;
884
885 ctx = ib_ucm_ctx_get(file, cmd.id);
886 if (!IS_ERR(ctx)) {
887 result = ib_send_cm_req(ctx->cm_id, &param);
888 ib_ucm_ctx_put(ctx);
889 } else
890 result = PTR_ERR(ctx);
891
892 done:
893 kfree(param.private_data);
894 kfree(param.primary_path);
895 kfree(param.alternate_path);
896 return result;
897 }
898
899 static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
900 const char __user *inbuf,
901 int in_len, int out_len)
902 {
903 struct ib_cm_rep_param param;
904 struct ib_ucm_context *ctx;
905 struct ib_ucm_rep cmd;
906 int result;
907
908 param.private_data = NULL;
909
910 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
911 return -EFAULT;
912
913 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
914 if (result)
915 return result;
916
917 param.qp_num = cmd.qpn;
918 param.starting_psn = cmd.psn;
919 param.private_data_len = cmd.len;
920 param.responder_resources = cmd.responder_resources;
921 param.initiator_depth = cmd.initiator_depth;
922 param.target_ack_delay = cmd.target_ack_delay;
923 param.failover_accepted = cmd.failover_accepted;
924 param.flow_control = cmd.flow_control;
925 param.rnr_retry_count = cmd.rnr_retry_count;
926 param.srq = cmd.srq;
927
928 ctx = ib_ucm_ctx_get(file, cmd.id);
929 if (!IS_ERR(ctx)) {
930 ctx->uid = cmd.uid;
931 result = ib_send_cm_rep(ctx->cm_id, &param);
932 ib_ucm_ctx_put(ctx);
933 } else
934 result = PTR_ERR(ctx);
935
936 kfree(param.private_data);
937 return result;
938 }
939
940 static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
941 const char __user *inbuf, int in_len,
942 int (*func)(struct ib_cm_id *cm_id,
943 const void *private_data,
944 u8 private_data_len))
945 {
946 struct ib_ucm_private_data cmd;
947 struct ib_ucm_context *ctx;
948 const void *private_data = NULL;
949 int result;
950
951 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
952 return -EFAULT;
953
954 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
955 if (result)
956 return result;
957
958 ctx = ib_ucm_ctx_get(file, cmd.id);
959 if (!IS_ERR(ctx)) {
960 result = func(ctx->cm_id, private_data, cmd.len);
961 ib_ucm_ctx_put(ctx);
962 } else
963 result = PTR_ERR(ctx);
964
965 kfree(private_data);
966 return result;
967 }
968
969 static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
970 const char __user *inbuf,
971 int in_len, int out_len)
972 {
973 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
974 }
975
976 static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
977 const char __user *inbuf,
978 int in_len, int out_len)
979 {
980 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
981 }
982
983 static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
984 const char __user *inbuf,
985 int in_len, int out_len)
986 {
987 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
988 }
989
990 static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
991 const char __user *inbuf, int in_len,
992 int (*func)(struct ib_cm_id *cm_id,
993 int status,
994 const void *info,
995 u8 info_len,
996 const void *data,
997 u8 data_len))
998 {
999 struct ib_ucm_context *ctx;
1000 struct ib_ucm_info cmd;
1001 const void *data = NULL;
1002 const void *info = NULL;
1003 int result;
1004
1005 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1006 return -EFAULT;
1007
1008 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
1009 if (result)
1010 goto done;
1011
1012 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
1013 if (result)
1014 goto done;
1015
1016 ctx = ib_ucm_ctx_get(file, cmd.id);
1017 if (!IS_ERR(ctx)) {
1018 result = func(ctx->cm_id, cmd.status, info, cmd.info_len,
1019 data, cmd.data_len);
1020 ib_ucm_ctx_put(ctx);
1021 } else
1022 result = PTR_ERR(ctx);
1023
1024 done:
1025 kfree(data);
1026 kfree(info);
1027 return result;
1028 }
1029
1030 static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
1031 const char __user *inbuf,
1032 int in_len, int out_len)
1033 {
1034 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
1035 }
1036
1037 static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
1038 const char __user *inbuf,
1039 int in_len, int out_len)
1040 {
1041 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
1042 }
1043
1044 static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
1045 const char __user *inbuf,
1046 int in_len, int out_len)
1047 {
1048 struct ib_ucm_context *ctx;
1049 struct ib_ucm_mra cmd;
1050 const void *data = NULL;
1051 int result;
1052
1053 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1054 return -EFAULT;
1055
1056 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
1057 if (result)
1058 return result;
1059
1060 ctx = ib_ucm_ctx_get(file, cmd.id);
1061 if (!IS_ERR(ctx)) {
1062 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len);
1063 ib_ucm_ctx_put(ctx);
1064 } else
1065 result = PTR_ERR(ctx);
1066
1067 kfree(data);
1068 return result;
1069 }
1070
1071 static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
1072 const char __user *inbuf,
1073 int in_len, int out_len)
1074 {
1075 struct ib_ucm_context *ctx;
1076 struct ib_sa_path_rec *path = NULL;
1077 struct ib_ucm_lap cmd;
1078 const void *data = NULL;
1079 int result;
1080
1081 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1082 return -EFAULT;
1083
1084 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
1085 if (result)
1086 goto done;
1087
1088 result = ib_ucm_path_get(&path, cmd.path);
1089 if (result)
1090 goto done;
1091
1092 ctx = ib_ucm_ctx_get(file, cmd.id);
1093 if (!IS_ERR(ctx)) {
1094 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
1095 ib_ucm_ctx_put(ctx);
1096 } else
1097 result = PTR_ERR(ctx);
1098
1099 done:
1100 kfree(data);
1101 kfree(path);
1102 return result;
1103 }
1104
1105 static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
1106 const char __user *inbuf,
1107 int in_len, int out_len)
1108 {
1109 struct ib_cm_sidr_req_param param;
1110 struct ib_ucm_context *ctx;
1111 struct ib_ucm_sidr_req cmd;
1112 int result;
1113
1114 param.private_data = NULL;
1115 param.path = NULL;
1116
1117 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1118 return -EFAULT;
1119
1120 result = ib_ucm_alloc_data(&param.private_data, cmd.data, cmd.len);
1121 if (result)
1122 goto done;
1123
1124 result = ib_ucm_path_get(&param.path, cmd.path);
1125 if (result)
1126 goto done;
1127
1128 param.private_data_len = cmd.len;
1129 param.service_id = cmd.sid;
1130 param.timeout_ms = cmd.timeout;
1131 param.max_cm_retries = cmd.max_cm_retries;
1132 param.pkey = cmd.pkey;
1133
1134 ctx = ib_ucm_ctx_get(file, cmd.id);
1135 if (!IS_ERR(ctx)) {
1136 result = ib_send_cm_sidr_req(ctx->cm_id, &param);
1137 ib_ucm_ctx_put(ctx);
1138 } else
1139 result = PTR_ERR(ctx);
1140
1141 done:
1142 kfree(param.private_data);
1143 kfree(param.path);
1144 return result;
1145 }
1146
1147 static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
1148 const char __user *inbuf,
1149 int in_len, int out_len)
1150 {
1151 struct ib_cm_sidr_rep_param param;
1152 struct ib_ucm_sidr_rep cmd;
1153 struct ib_ucm_context *ctx;
1154 int result;
1155
1156 param.info = NULL;
1157
1158 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1159 return -EFAULT;
1160
1161 result = ib_ucm_alloc_data(&param.private_data,
1162 cmd.data, cmd.data_len);
1163 if (result)
1164 goto done;
1165
1166 result = ib_ucm_alloc_data(&param.info, cmd.info, cmd.info_len);
1167 if (result)
1168 goto done;
1169
1170 param.qp_num = cmd.qpn;
1171 param.qkey = cmd.qkey;
1172 param.status = cmd.status;
1173 param.info_length = cmd.info_len;
1174 param.private_data_len = cmd.data_len;
1175
1176 ctx = ib_ucm_ctx_get(file, cmd.id);
1177 if (!IS_ERR(ctx)) {
1178 result = ib_send_cm_sidr_rep(ctx->cm_id, &param);
1179 ib_ucm_ctx_put(ctx);
1180 } else
1181 result = PTR_ERR(ctx);
1182
1183 done:
1184 kfree(param.private_data);
1185 kfree(param.info);
1186 return result;
1187 }
1188
1189 static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
1190 const char __user *inbuf,
1191 int in_len, int out_len) = {
1192 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
1193 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
1194 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
1195 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
1196 [IB_USER_CM_CMD_ESTABLISH] = ib_ucm_establish,
1197 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
1198 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
1199 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
1200 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
1201 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
1202 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
1203 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
1204 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
1205 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
1206 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
1207 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
1208 [IB_USER_CM_CMD_EVENT] = ib_ucm_event,
1209 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr,
1210 };
1211
1212 static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
1213 size_t len, loff_t *pos)
1214 {
1215 struct ib_ucm_file *file = filp->private_data;
1216 struct ib_ucm_cmd_hdr hdr;
1217 ssize_t result;
1218
1219 if (len < sizeof(hdr))
1220 return -EINVAL;
1221
1222 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1223 return -EFAULT;
1224
1225 if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
1226 return -EINVAL;
1227
1228 if (hdr.in + sizeof(hdr) > len)
1229 return -EINVAL;
1230
1231 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
1232 hdr.in, hdr.out);
1233 if (!result)
1234 result = len;
1235
1236 return result;
1237 }
1238
1239 static unsigned int ib_ucm_poll(struct file *filp,
1240 struct poll_table_struct *wait)
1241 {
1242 struct ib_ucm_file *file = filp->private_data;
1243 unsigned int mask = 0;
1244
1245 poll_wait(filp, &file->poll_wait, wait);
1246
1247 if (!list_empty(&file->events))
1248 mask = POLLIN | POLLRDNORM;
1249
1250 return mask;
1251 }
1252
1253 static int ib_ucm_open(struct inode *inode, struct file *filp)
1254 {
1255 struct ib_ucm_file *file;
1256
1257 file = kmalloc(sizeof(*file), GFP_KERNEL);
1258 if (!file)
1259 return -ENOMEM;
1260
1261 INIT_LIST_HEAD(&file->events);
1262 INIT_LIST_HEAD(&file->ctxs);
1263 init_waitqueue_head(&file->poll_wait);
1264
1265 init_MUTEX(&file->mutex);
1266
1267 filp->private_data = file;
1268 file->filp = filp;
1269 file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev);
1270
1271 return 0;
1272 }
1273
1274 static int ib_ucm_close(struct inode *inode, struct file *filp)
1275 {
1276 struct ib_ucm_file *file = filp->private_data;
1277 struct ib_ucm_context *ctx;
1278
1279 down(&file->mutex);
1280 while (!list_empty(&file->ctxs)) {
1281 ctx = list_entry(file->ctxs.next,
1282 struct ib_ucm_context, file_list);
1283 up(&file->mutex);
1284
1285 down(&ctx_id_mutex);
1286 idr_remove(&ctx_id_table, ctx->id);
1287 up(&ctx_id_mutex);
1288
1289 ib_destroy_cm_id(ctx->cm_id);
1290 ib_ucm_cleanup_events(ctx);
1291 kfree(ctx);
1292
1293 down(&file->mutex);
1294 }
1295 up(&file->mutex);
1296 kfree(file);
1297 return 0;
1298 }
1299
1300 static void ib_ucm_release_class_dev(struct class_device *class_dev)
1301 {
1302 struct ib_ucm_device *dev;
1303
1304 dev = container_of(class_dev, struct ib_ucm_device, class_dev);
1305 cdev_del(&dev->dev);
1306 clear_bit(dev->devnum, dev_map);
1307 kfree(dev);
1308 }
1309
1310 static struct file_operations ucm_fops = {
1311 .owner = THIS_MODULE,
1312 .open = ib_ucm_open,
1313 .release = ib_ucm_close,
1314 .write = ib_ucm_write,
1315 .poll = ib_ucm_poll,
1316 };
1317
1318 static struct class ucm_class = {
1319 .name = "infiniband_cm",
1320 .release = ib_ucm_release_class_dev
1321 };
1322
1323 static ssize_t show_dev(struct class_device *class_dev, char *buf)
1324 {
1325 struct ib_ucm_device *dev;
1326
1327 dev = container_of(class_dev, struct ib_ucm_device, class_dev);
1328 return print_dev_t(buf, dev->dev.dev);
1329 }
1330 static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
1331
1332 static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
1333 {
1334 struct ib_ucm_device *dev;
1335
1336 dev = container_of(class_dev, struct ib_ucm_device, class_dev);
1337 return sprintf(buf, "%s\n", dev->ib_dev->name);
1338 }
1339 static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
1340
1341 static void ib_ucm_add_one(struct ib_device *device)
1342 {
1343 struct ib_ucm_device *ucm_dev;
1344
1345 if (!device->alloc_ucontext)
1346 return;
1347
1348 ucm_dev = kmalloc(sizeof *ucm_dev, GFP_KERNEL);
1349 if (!ucm_dev)
1350 return;
1351
1352 memset(ucm_dev, 0, sizeof *ucm_dev);
1353 ucm_dev->ib_dev = device;
1354
1355 ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
1356 if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES)
1357 goto err;
1358
1359 set_bit(ucm_dev->devnum, dev_map);
1360
1361 cdev_init(&ucm_dev->dev, &ucm_fops);
1362 ucm_dev->dev.owner = THIS_MODULE;
1363 kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum);
1364 if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1))
1365 goto err;
1366
1367 ucm_dev->class_dev.class = &ucm_class;
1368 ucm_dev->class_dev.dev = device->dma_device;
1369 snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d",
1370 ucm_dev->devnum);
1371 if (class_device_register(&ucm_dev->class_dev))
1372 goto err_cdev;
1373
1374 if (class_device_create_file(&ucm_dev->class_dev,
1375 &class_device_attr_dev))
1376 goto err_class;
1377 if (class_device_create_file(&ucm_dev->class_dev,
1378 &class_device_attr_ibdev))
1379 goto err_class;
1380
1381 ib_set_client_data(device, &ucm_client, ucm_dev);
1382 return;
1383
1384 err_class:
1385 class_device_unregister(&ucm_dev->class_dev);
1386 err_cdev:
1387 cdev_del(&ucm_dev->dev);
1388 clear_bit(ucm_dev->devnum, dev_map);
1389 err:
1390 kfree(ucm_dev);
1391 return;
1392 }
1393
1394 static void ib_ucm_remove_one(struct ib_device *device)
1395 {
1396 struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client);
1397
1398 if (!ucm_dev)
1399 return;
1400
1401 class_device_unregister(&ucm_dev->class_dev);
1402 }
1403
1404 static ssize_t show_abi_version(struct class *class, char *buf)
1405 {
1406 return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
1407 }
1408 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1409
1410 static int __init ib_ucm_init(void)
1411 {
1412 int ret;
1413
1414 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
1415 "infiniband_cm");
1416 if (ret) {
1417 printk(KERN_ERR "ucm: couldn't register device number\n");
1418 goto err;
1419 }
1420
1421 ret = class_register(&ucm_class);
1422 if (ret) {
1423 printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n");
1424 goto err_chrdev;
1425 }
1426
1427 ret = class_create_file(&ucm_class, &class_attr_abi_version);
1428 if (ret) {
1429 printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
1430 goto err_class;
1431 }
1432
1433 ret = ib_register_client(&ucm_client);
1434 if (ret) {
1435 printk(KERN_ERR "ucm: couldn't register client\n");
1436 goto err_class;
1437 }
1438 return 0;
1439
1440 err_class:
1441 class_unregister(&ucm_class);
1442 err_chrdev:
1443 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1444 err:
1445 return ret;
1446 }
1447
1448 static void __exit ib_ucm_cleanup(void)
1449 {
1450 ib_unregister_client(&ucm_client);
1451 class_unregister(&ucm_class);
1452 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1453 idr_destroy(&ctx_id_table);
1454 }
1455
1456 module_init(ib_ucm_init);
1457 module_exit(ib_ucm_cleanup);
x86 "subsystem" repository