2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/completion.h>
36 #include <linux/module.h>
37 #include <linux/device.h>
38 #include <linux/err.h>
39 #include <linux/poll.h>
40 #include <linux/file.h>
41 #include <linux/cdev.h>
42 #include <linux/idr.h>
43 #include <linux/mutex.h>
44 #include <linux/string.h>
46 #include <asm/uaccess.h>
48 #include <rdma/ib_cm.h>
49 #include <rdma/ib_user_cm.h>
50 #include <rdma/ib_marshall.h>
52 MODULE_AUTHOR("Libor Michalek");
53 MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
54 MODULE_LICENSE("Dual BSD/GPL");
56 struct ib_ucm_device {
60 struct ib_device *ib_dev;
64 struct mutex file_mutex;
66 struct ib_ucm_device *device;
68 struct list_head ctxs;
69 struct list_head events;
70 wait_queue_head_t poll_wait;
73 struct ib_ucm_context {
75 struct completion comp;
79 struct ib_ucm_file *file;
80 struct ib_cm_id *cm_id;
83 struct list_head events; /* list of pending events. */
84 struct list_head file_list; /* member in file ctx list */
88 struct ib_ucm_context *ctx;
89 struct list_head file_list; /* member in file event list */
90 struct list_head ctx_list; /* member in ctx event list */
92 struct ib_cm_id *cm_id;
93 struct ib_ucm_event_resp resp;
102 IB_UCM_BASE_MINOR = 224,
103 IB_UCM_MAX_DEVICES = 32
106 #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
108 static void ib_ucm_add_one(struct ib_device *device);
109 static void ib_ucm_remove_one(struct ib_device *device);
111 static struct ib_client ucm_client = {
113 .add = ib_ucm_add_one,
114 .remove = ib_ucm_remove_one
117 static DEFINE_MUTEX(ctx_id_mutex);
118 static DEFINE_IDR(ctx_id_table);
119 static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
121 static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
123 struct ib_ucm_context *ctx;
125 mutex_lock(&ctx_id_mutex);
126 ctx = idr_find(&ctx_id_table, id);
128 ctx = ERR_PTR(-ENOENT);
129 else if (ctx->file != file)
130 ctx = ERR_PTR(-EINVAL);
132 atomic_inc(&ctx->ref);
133 mutex_unlock(&ctx_id_mutex);
138 static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
140 if (atomic_dec_and_test(&ctx->ref))
141 complete(&ctx->comp);
144 static inline int ib_ucm_new_cm_id(int event)
146 return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED;
149 static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx)
151 struct ib_ucm_event *uevent;
153 mutex_lock(&ctx->file->file_mutex);
154 list_del(&ctx->file_list);
155 while (!list_empty(&ctx->events)) {
157 uevent = list_entry(ctx->events.next,
158 struct ib_ucm_event, ctx_list);
159 list_del(&uevent->file_list);
160 list_del(&uevent->ctx_list);
161 mutex_unlock(&ctx->file->file_mutex);
163 /* clear incoming connections. */
164 if (ib_ucm_new_cm_id(uevent->resp.event))
165 ib_destroy_cm_id(uevent->cm_id);
168 mutex_lock(&ctx->file->file_mutex);
170 mutex_unlock(&ctx->file->file_mutex);
173 static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
175 struct ib_ucm_context *ctx;
178 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
182 atomic_set(&ctx->ref, 1);
183 init_completion(&ctx->comp);
185 INIT_LIST_HEAD(&ctx->events);
188 result = idr_pre_get(&ctx_id_table, GFP_KERNEL);
192 mutex_lock(&ctx_id_mutex);
193 result = idr_get_new(&ctx_id_table, ctx, &ctx->id);
194 mutex_unlock(&ctx_id_mutex);
195 } while (result == -EAGAIN);
200 list_add_tail(&ctx->file_list, &file->ctxs);
208 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
209 struct ib_cm_req_event_param *kreq)
211 ureq->remote_ca_guid = kreq->remote_ca_guid;
212 ureq->remote_qkey = kreq->remote_qkey;
213 ureq->remote_qpn = kreq->remote_qpn;
214 ureq->qp_type = kreq->qp_type;
215 ureq->starting_psn = kreq->starting_psn;
216 ureq->responder_resources = kreq->responder_resources;
217 ureq->initiator_depth = kreq->initiator_depth;
218 ureq->local_cm_response_timeout = kreq->local_cm_response_timeout;
219 ureq->flow_control = kreq->flow_control;
220 ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout;
221 ureq->retry_count = kreq->retry_count;
222 ureq->rnr_retry_count = kreq->rnr_retry_count;
223 ureq->srq = kreq->srq;
224 ureq->port = kreq->port;
226 ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path);
227 if (kreq->alternate_path)
228 ib_copy_path_rec_to_user(&ureq->alternate_path,
229 kreq->alternate_path);
232 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
233 struct ib_cm_rep_event_param *krep)
235 urep->remote_ca_guid = krep->remote_ca_guid;
236 urep->remote_qkey = krep->remote_qkey;
237 urep->remote_qpn = krep->remote_qpn;
238 urep->starting_psn = krep->starting_psn;
239 urep->responder_resources = krep->responder_resources;
240 urep->initiator_depth = krep->initiator_depth;
241 urep->target_ack_delay = krep->target_ack_delay;
242 urep->failover_accepted = krep->failover_accepted;
243 urep->flow_control = krep->flow_control;
244 urep->rnr_retry_count = krep->rnr_retry_count;
245 urep->srq = krep->srq;
248 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
249 struct ib_cm_sidr_rep_event_param *krep)
251 urep->status = krep->status;
252 urep->qkey = krep->qkey;
253 urep->qpn = krep->qpn;
256 static int ib_ucm_event_process(struct ib_cm_event *evt,
257 struct ib_ucm_event *uvt)
261 switch (evt->event) {
262 case IB_CM_REQ_RECEIVED:
263 ib_ucm_event_req_get(&uvt->resp.u.req_resp,
264 &evt->param.req_rcvd);
265 uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE;
266 uvt->resp.present = IB_UCM_PRES_PRIMARY;
267 uvt->resp.present |= (evt->param.req_rcvd.alternate_path ?
268 IB_UCM_PRES_ALTERNATE : 0);
270 case IB_CM_REP_RECEIVED:
271 ib_ucm_event_rep_get(&uvt->resp.u.rep_resp,
272 &evt->param.rep_rcvd);
273 uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
275 case IB_CM_RTU_RECEIVED:
276 uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE;
277 uvt->resp.u.send_status = evt->param.send_status;
279 case IB_CM_DREQ_RECEIVED:
280 uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE;
281 uvt->resp.u.send_status = evt->param.send_status;
283 case IB_CM_DREP_RECEIVED:
284 uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE;
285 uvt->resp.u.send_status = evt->param.send_status;
287 case IB_CM_MRA_RECEIVED:
288 uvt->resp.u.mra_resp.timeout =
289 evt->param.mra_rcvd.service_timeout;
290 uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE;
292 case IB_CM_REJ_RECEIVED:
293 uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason;
294 uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
295 uvt->info_len = evt->param.rej_rcvd.ari_length;
296 info = evt->param.rej_rcvd.ari;
298 case IB_CM_LAP_RECEIVED:
299 ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path,
300 evt->param.lap_rcvd.alternate_path);
301 uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE;
302 uvt->resp.present = IB_UCM_PRES_ALTERNATE;
304 case IB_CM_APR_RECEIVED:
305 uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status;
306 uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE;
307 uvt->info_len = evt->param.apr_rcvd.info_len;
308 info = evt->param.apr_rcvd.apr_info;
310 case IB_CM_SIDR_REQ_RECEIVED:
311 uvt->resp.u.sidr_req_resp.pkey =
312 evt->param.sidr_req_rcvd.pkey;
313 uvt->resp.u.sidr_req_resp.port =
314 evt->param.sidr_req_rcvd.port;
315 uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
317 case IB_CM_SIDR_REP_RECEIVED:
318 ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp,
319 &evt->param.sidr_rep_rcvd);
320 uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
321 uvt->info_len = evt->param.sidr_rep_rcvd.info_len;
322 info = evt->param.sidr_rep_rcvd.info;
325 uvt->resp.u.send_status = evt->param.send_status;
330 uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL);
334 uvt->resp.present |= IB_UCM_PRES_DATA;
338 uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL);
342 uvt->resp.present |= IB_UCM_PRES_INFO;
352 static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
353 struct ib_cm_event *event)
355 struct ib_ucm_event *uevent;
356 struct ib_ucm_context *ctx;
359 ctx = cm_id->context;
361 uevent = kzalloc(sizeof *uevent, GFP_KERNEL);
366 uevent->cm_id = cm_id;
367 uevent->resp.uid = ctx->uid;
368 uevent->resp.id = ctx->id;
369 uevent->resp.event = event->event;
371 result = ib_ucm_event_process(event, uevent);
375 mutex_lock(&ctx->file->file_mutex);
376 list_add_tail(&uevent->file_list, &ctx->file->events);
377 list_add_tail(&uevent->ctx_list, &ctx->events);
378 wake_up_interruptible(&ctx->file->poll_wait);
380 selwakeup(&ctx->file->filp->f_selinfo);
381 mutex_unlock(&ctx->file->file_mutex);
387 /* Destroy new cm_id's */
388 return ib_ucm_new_cm_id(event->event);
391 static ssize_t ib_ucm_event(struct ib_ucm_file *file,
392 const char __user *inbuf,
393 int in_len, int out_len)
395 struct ib_ucm_context *ctx;
396 struct ib_ucm_event_get cmd;
397 struct ib_ucm_event *uevent;
401 if (out_len < sizeof(struct ib_ucm_event_resp))
404 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
407 mutex_lock(&file->file_mutex);
408 while (list_empty(&file->events)) {
409 mutex_unlock(&file->file_mutex);
411 if (file->filp->f_flags & O_NONBLOCK)
414 if (wait_event_interruptible(file->poll_wait,
415 !list_empty(&file->events)))
418 mutex_lock(&file->file_mutex);
421 uevent = list_entry(file->events.next, struct ib_ucm_event, file_list);
423 if (ib_ucm_new_cm_id(uevent->resp.event)) {
424 ctx = ib_ucm_ctx_alloc(file);
430 ctx->cm_id = uevent->cm_id;
431 ctx->cm_id->context = ctx;
432 uevent->resp.id = ctx->id;
435 if (copy_to_user((void __user *)(unsigned long)cmd.response,
436 &uevent->resp, sizeof(uevent->resp))) {
442 if (cmd.data_len < uevent->data_len) {
446 if (copy_to_user((void __user *)(unsigned long)cmd.data,
447 uevent->data, uevent->data_len)) {
454 if (cmd.info_len < uevent->info_len) {
458 if (copy_to_user((void __user *)(unsigned long)cmd.info,
459 uevent->info, uevent->info_len)) {
465 list_del(&uevent->file_list);
466 list_del(&uevent->ctx_list);
467 uevent->ctx->events_reported++;
473 mutex_unlock(&file->file_mutex);
477 static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
478 const char __user *inbuf,
479 int in_len, int out_len)
481 struct ib_ucm_create_id cmd;
482 struct ib_ucm_create_id_resp resp;
483 struct ib_ucm_context *ctx;
486 if (out_len < sizeof(resp))
489 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
492 mutex_lock(&file->file_mutex);
493 ctx = ib_ucm_ctx_alloc(file);
494 mutex_unlock(&file->file_mutex);
499 ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
500 ib_ucm_event_handler, ctx);
501 if (IS_ERR(ctx->cm_id)) {
502 result = PTR_ERR(ctx->cm_id);
507 if (copy_to_user((void __user *)(unsigned long)cmd.response,
508 &resp, sizeof(resp))) {
515 ib_destroy_cm_id(ctx->cm_id);
517 mutex_lock(&ctx_id_mutex);
518 idr_remove(&ctx_id_table, ctx->id);
519 mutex_unlock(&ctx_id_mutex);
524 static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file,
525 const char __user *inbuf,
526 int in_len, int out_len)
528 struct ib_ucm_destroy_id cmd;
529 struct ib_ucm_destroy_id_resp resp;
530 struct ib_ucm_context *ctx;
533 if (out_len < sizeof(resp))
536 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
539 mutex_lock(&ctx_id_mutex);
540 ctx = idr_find(&ctx_id_table, cmd.id);
542 ctx = ERR_PTR(-ENOENT);
543 else if (ctx->file != file)
544 ctx = ERR_PTR(-EINVAL);
546 idr_remove(&ctx_id_table, ctx->id);
547 mutex_unlock(&ctx_id_mutex);
553 wait_for_completion(&ctx->comp);
555 /* No new events will be generated after destroying the cm_id. */
556 ib_destroy_cm_id(ctx->cm_id);
557 /* Cleanup events not yet reported to the user. */
558 ib_ucm_cleanup_events(ctx);
560 resp.events_reported = ctx->events_reported;
561 if (copy_to_user((void __user *)(unsigned long)cmd.response,
562 &resp, sizeof(resp)))
569 static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file,
570 const char __user *inbuf,
571 int in_len, int out_len)
573 struct ib_ucm_attr_id_resp resp;
574 struct ib_ucm_attr_id cmd;
575 struct ib_ucm_context *ctx;
578 if (out_len < sizeof(resp))
581 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
584 ctx = ib_ucm_ctx_get(file, cmd.id);
588 resp.service_id = ctx->cm_id->service_id;
589 resp.service_mask = ctx->cm_id->service_mask;
590 resp.local_id = ctx->cm_id->local_id;
591 resp.remote_id = ctx->cm_id->remote_id;
593 if (copy_to_user((void __user *)(unsigned long)cmd.response,
594 &resp, sizeof(resp)))
601 static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
602 const char __user *inbuf,
603 int in_len, int out_len)
605 struct ib_uverbs_qp_attr resp;
606 struct ib_ucm_init_qp_attr cmd;
607 struct ib_ucm_context *ctx;
608 struct ib_qp_attr qp_attr;
611 if (out_len < sizeof(resp))
614 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
617 ctx = ib_ucm_ctx_get(file, cmd.id);
621 resp.qp_attr_mask = 0;
622 memset(&qp_attr, 0, sizeof qp_attr);
623 qp_attr.qp_state = cmd.qp_state;
624 result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask);
628 ib_copy_qp_attr_to_user(&resp, &qp_attr);
630 if (copy_to_user((void __user *)(unsigned long)cmd.response,
631 &resp, sizeof(resp)))
639 static int ucm_validate_listen(__be64 service_id, __be64 service_mask)
641 service_id &= service_mask;
643 if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) ||
644 ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID))
650 static ssize_t ib_ucm_listen(struct ib_ucm_file *file,
651 const char __user *inbuf,
652 int in_len, int out_len)
654 struct ib_ucm_listen cmd;
655 struct ib_ucm_context *ctx;
658 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
661 ctx = ib_ucm_ctx_get(file, cmd.id);
665 result = ucm_validate_listen(cmd.service_id, cmd.service_mask);
669 result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask,
676 static ssize_t ib_ucm_notify(struct ib_ucm_file *file,
677 const char __user *inbuf,
678 int in_len, int out_len)
680 struct ib_ucm_notify cmd;
681 struct ib_ucm_context *ctx;
684 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
687 ctx = ib_ucm_ctx_get(file, cmd.id);
691 result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event);
696 static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len)
705 data = kmalloc(len, GFP_KERNEL);
709 if (copy_from_user(data, (void __user *)(unsigned long)src, len)) {
718 static int ib_ucm_path_get(struct ib_sa_path_rec **path, u64 src)
720 struct ib_user_path_rec upath;
721 struct ib_sa_path_rec *sa_path;
728 sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL);
732 if (copy_from_user(&upath, (void __user *)(unsigned long)src,
739 ib_copy_path_rec_from_user(sa_path, &upath);
744 static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
745 const char __user *inbuf,
746 int in_len, int out_len)
748 struct ib_cm_req_param param;
749 struct ib_ucm_context *ctx;
750 struct ib_ucm_req cmd;
753 param.private_data = NULL;
754 param.primary_path = NULL;
755 param.alternate_path = NULL;
757 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
760 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
764 result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path);
768 result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path);
772 param.private_data_len = cmd.len;
773 param.service_id = cmd.sid;
774 param.qp_num = cmd.qpn;
775 param.qp_type = cmd.qp_type;
776 param.starting_psn = cmd.psn;
777 param.peer_to_peer = cmd.peer_to_peer;
778 param.responder_resources = cmd.responder_resources;
779 param.initiator_depth = cmd.initiator_depth;
780 param.remote_cm_response_timeout = cmd.remote_cm_response_timeout;
781 param.flow_control = cmd.flow_control;
782 param.local_cm_response_timeout = cmd.local_cm_response_timeout;
783 param.retry_count = cmd.retry_count;
784 param.rnr_retry_count = cmd.rnr_retry_count;
785 param.max_cm_retries = cmd.max_cm_retries;
788 ctx = ib_ucm_ctx_get(file, cmd.id);
790 result = ib_send_cm_req(ctx->cm_id, ¶m);
793 result = PTR_ERR(ctx);
796 kfree(param.private_data);
797 kfree(param.primary_path);
798 kfree(param.alternate_path);
802 static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
803 const char __user *inbuf,
804 int in_len, int out_len)
806 struct ib_cm_rep_param param;
807 struct ib_ucm_context *ctx;
808 struct ib_ucm_rep cmd;
811 param.private_data = NULL;
813 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
816 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
820 param.qp_num = cmd.qpn;
821 param.starting_psn = cmd.psn;
822 param.private_data_len = cmd.len;
823 param.responder_resources = cmd.responder_resources;
824 param.initiator_depth = cmd.initiator_depth;
825 param.failover_accepted = cmd.failover_accepted;
826 param.flow_control = cmd.flow_control;
827 param.rnr_retry_count = cmd.rnr_retry_count;
830 ctx = ib_ucm_ctx_get(file, cmd.id);
833 result = ib_send_cm_rep(ctx->cm_id, ¶m);
836 result = PTR_ERR(ctx);
838 kfree(param.private_data);
842 static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
843 const char __user *inbuf, int in_len,
844 int (*func)(struct ib_cm_id *cm_id,
845 const void *private_data,
846 u8 private_data_len))
848 struct ib_ucm_private_data cmd;
849 struct ib_ucm_context *ctx;
850 const void *private_data = NULL;
853 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
856 result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);
860 ctx = ib_ucm_ctx_get(file, cmd.id);
862 result = func(ctx->cm_id, private_data, cmd.len);
865 result = PTR_ERR(ctx);
871 static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file,
872 const char __user *inbuf,
873 int in_len, int out_len)
875 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu);
878 static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file,
879 const char __user *inbuf,
880 int in_len, int out_len)
882 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq);
885 static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file,
886 const char __user *inbuf,
887 int in_len, int out_len)
889 return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep);
892 static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
893 const char __user *inbuf, int in_len,
894 int (*func)(struct ib_cm_id *cm_id,
901 struct ib_ucm_context *ctx;
902 struct ib_ucm_info cmd;
903 const void *data = NULL;
904 const void *info = NULL;
907 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
910 result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len);
914 result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len);
918 ctx = ib_ucm_ctx_get(file, cmd.id);
920 result = func(ctx->cm_id, cmd.status, info, cmd.info_len,
924 result = PTR_ERR(ctx);
932 static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file,
933 const char __user *inbuf,
934 int in_len, int out_len)
936 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej);
939 static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file,
940 const char __user *inbuf,
941 int in_len, int out_len)
943 return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr);
946 static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
947 const char __user *inbuf,
948 int in_len, int out_len)
950 struct ib_ucm_context *ctx;
951 struct ib_ucm_mra cmd;
952 const void *data = NULL;
955 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
958 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
962 ctx = ib_ucm_ctx_get(file, cmd.id);
964 result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len);
967 result = PTR_ERR(ctx);
973 static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
974 const char __user *inbuf,
975 int in_len, int out_len)
977 struct ib_ucm_context *ctx;
978 struct ib_sa_path_rec *path = NULL;
979 struct ib_ucm_lap cmd;
980 const void *data = NULL;
983 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
986 result = ib_ucm_alloc_data(&data, cmd.data, cmd.len);
990 result = ib_ucm_path_get(&path, cmd.path);
994 ctx = ib_ucm_ctx_get(file, cmd.id);
996 result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len);
999 result = PTR_ERR(ctx);
1007 static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
1008 const char __user *inbuf,
1009 int in_len, int out_len)
1011 struct ib_cm_sidr_req_param param;
1012 struct ib_ucm_context *ctx;
1013 struct ib_ucm_sidr_req cmd;
1016 param.private_data = NULL;
1019 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1022 result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len);
1026 result = ib_ucm_path_get(¶m.path, cmd.path);
1030 param.private_data_len = cmd.len;
1031 param.service_id = cmd.sid;
1032 param.timeout_ms = cmd.timeout;
1033 param.max_cm_retries = cmd.max_cm_retries;
1035 ctx = ib_ucm_ctx_get(file, cmd.id);
1037 result = ib_send_cm_sidr_req(ctx->cm_id, ¶m);
1038 ib_ucm_ctx_put(ctx);
1040 result = PTR_ERR(ctx);
1043 kfree(param.private_data);
1048 static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
1049 const char __user *inbuf,
1050 int in_len, int out_len)
1052 struct ib_cm_sidr_rep_param param;
1053 struct ib_ucm_sidr_rep cmd;
1054 struct ib_ucm_context *ctx;
1059 if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
1062 result = ib_ucm_alloc_data(¶m.private_data,
1063 cmd.data, cmd.data_len);
1067 result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len);
1071 param.qp_num = cmd.qpn;
1072 param.qkey = cmd.qkey;
1073 param.status = cmd.status;
1074 param.info_length = cmd.info_len;
1075 param.private_data_len = cmd.data_len;
1077 ctx = ib_ucm_ctx_get(file, cmd.id);
1079 result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m);
1080 ib_ucm_ctx_put(ctx);
1082 result = PTR_ERR(ctx);
1085 kfree(param.private_data);
1090 static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file,
1091 const char __user *inbuf,
1092 int in_len, int out_len) = {
1093 [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id,
1094 [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id,
1095 [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id,
1096 [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen,
1097 [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify,
1098 [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req,
1099 [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep,
1100 [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu,
1101 [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq,
1102 [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep,
1103 [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej,
1104 [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra,
1105 [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap,
1106 [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr,
1107 [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req,
1108 [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep,
1109 [IB_USER_CM_CMD_EVENT] = ib_ucm_event,
1110 [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr,
1113 static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
1114 size_t len, loff_t *pos)
1116 struct ib_ucm_file *file = filp->private_data;
1117 struct ib_ucm_cmd_hdr hdr;
1120 if (len < sizeof(hdr))
1123 if (copy_from_user(&hdr, buf, sizeof(hdr)))
1126 if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
1129 if (hdr.in + sizeof(hdr) > len)
1132 result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr),
1140 static unsigned int ib_ucm_poll(struct file *filp,
1141 struct poll_table_struct *wait)
1143 struct ib_ucm_file *file = filp->private_data;
1144 unsigned int mask = 0;
1146 poll_wait(filp, &file->poll_wait, wait);
1148 if (!list_empty(&file->events))
1149 mask = POLLIN | POLLRDNORM;
1155 * ib_ucm_open() does not need the BKL:
1157 * - no global state is referred to;
1158 * - there is no ioctl method to race against;
1159 * - no further module initialization is required for open to work
1160 * after the device is registered.
1162 static int ib_ucm_open(struct inode *inode, struct file *filp)
1164 struct ib_ucm_file *file;
1166 file = kzalloc(sizeof(*file), GFP_KERNEL);
1170 INIT_LIST_HEAD(&file->events);
1171 INIT_LIST_HEAD(&file->ctxs);
1172 init_waitqueue_head(&file->poll_wait);
1174 mutex_init(&file->file_mutex);
1176 filp->private_data = file;
1178 file->device = container_of(inode->i_cdev->si_drv1, struct ib_ucm_device, cdev);
1183 static int ib_ucm_close(struct inode *inode, struct file *filp)
1185 struct ib_ucm_file *file = filp->private_data;
1186 struct ib_ucm_context *ctx;
1188 mutex_lock(&file->file_mutex);
1189 while (!list_empty(&file->ctxs)) {
1190 ctx = list_entry(file->ctxs.next,
1191 struct ib_ucm_context, file_list);
1192 mutex_unlock(&file->file_mutex);
1194 mutex_lock(&ctx_id_mutex);
1195 idr_remove(&ctx_id_table, ctx->id);
1196 mutex_unlock(&ctx_id_mutex);
1198 ib_destroy_cm_id(ctx->cm_id);
1199 ib_ucm_cleanup_events(ctx);
1202 mutex_lock(&file->file_mutex);
1204 mutex_unlock(&file->file_mutex);
1209 static void ib_ucm_release_dev(struct device *dev)
1211 struct ib_ucm_device *ucm_dev;
1213 ucm_dev = container_of(dev, struct ib_ucm_device, dev);
1214 cdev_del(&ucm_dev->cdev);
1215 clear_bit(ucm_dev->devnum, dev_map);
1219 static const struct file_operations ucm_fops = {
1220 .owner = THIS_MODULE,
1221 .open = ib_ucm_open,
1222 .release = ib_ucm_close,
1223 .write = ib_ucm_write,
1224 .poll = ib_ucm_poll,
1227 static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr,
1230 struct ib_ucm_device *ucm_dev;
1232 ucm_dev = container_of(dev, struct ib_ucm_device, dev);
1233 return sprintf(buf, "%s\n", ucm_dev->ib_dev->name);
1235 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
1237 static void ib_ucm_add_one(struct ib_device *device)
1239 struct ib_ucm_device *ucm_dev;
1241 if (!device->alloc_ucontext ||
1242 rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1245 ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL);
1249 ucm_dev->ib_dev = device;
1251 ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
1252 if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES)
1255 set_bit(ucm_dev->devnum, dev_map);
1257 cdev_init(&ucm_dev->cdev, &ucm_fops);
1258 ucm_dev->cdev.owner = THIS_MODULE;
1259 kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum);
1260 if (cdev_add(&ucm_dev->cdev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1))
1263 ucm_dev->dev.class = &cm_class;
1264 ucm_dev->dev.parent = device->dma_device;
1265 ucm_dev->dev.devt = ucm_dev->cdev.dev;
1266 ucm_dev->dev.release = ib_ucm_release_dev;
1267 dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum);
1268 if (device_register(&ucm_dev->dev))
1271 if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev))
1274 ib_set_client_data(device, &ucm_client, ucm_dev);
1278 device_unregister(&ucm_dev->dev);
1280 cdev_del(&ucm_dev->cdev);
1281 clear_bit(ucm_dev->devnum, dev_map);
1287 static void ib_ucm_remove_one(struct ib_device *device)
1289 struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client);
1294 device_unregister(&ucm_dev->dev);
1297 static ssize_t show_abi_version(struct class *class, struct class_attribute *attr, char *buf)
1299 return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
1301 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
1303 static int __init ib_ucm_init(void)
1307 ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
1310 printk(KERN_ERR "ucm: couldn't register device number\n");
1314 ret = class_create_file(&cm_class, &class_attr_abi_version);
1316 printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
1320 ret = ib_register_client(&ucm_client);
1322 printk(KERN_ERR "ucm: couldn't register client\n");
1328 class_remove_file(&cm_class, &class_attr_abi_version);
1330 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1335 static void __exit ib_ucm_cleanup(void)
1337 ib_unregister_client(&ucm_client);
1338 class_remove_file(&cm_class, &class_attr_abi_version);
1339 unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
1340 idr_destroy(&ctx_id_table);
1343 module_init_order(ib_ucm_init, SI_ORDER_THIRD);
1344 module_exit(ib_ucm_cleanup);