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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
[deliverable/linux.git] / drivers / char / ipmi / ipmi_devintf.c
CommitLineData
1da177e4
LT		 1/*
2 * ipmi_devintf.c
3 *
4 * Linux device interface for the IPMI message handler.
5 *
6 * Author: MontaVista Software, Inc.
7 * Corey Minyard <minyard@mvista.com>
8 * source@mvista.com
9 *
10 * Copyright 2002 MontaVista Software Inc.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
27 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * You should have received a copy of the GNU General Public License along
30 * with this program; if not, write to the Free Software Foundation, Inc.,
31 * 675 Mass Ave, Cambridge, MA 02139, USA.
32 */
33
1da177e4
LT		 34#include <linux/module.h>
35#include <linux/moduleparam.h>
36#include <linux/errno.h>
1da177e4 37#include <linux/poll.h>
a99bbaf5 38#include <linux/sched.h>
1da177e4
LT		 39#include <linux/spinlock.h>
40#include <linux/slab.h>
1da177e4 41#include <linux/ipmi.h>
d6dfd131 42#include <linux/mutex.h>
1da177e4 43#include <linux/init.h>
37e0915b 44#include <linux/device.h>
6a94f920 45#include <linux/compat.h>
1da177e4 46
1da177e4
LT		 47struct ipmi_file_private
48{
49 ipmi_user_t user;
50 spinlock_t recv_msg_lock;
51 struct list_head recv_msgs;
52 struct file *file;
53 struct fasync_struct *fasync_queue;
54 wait_queue_head_t wait;
d6dfd131 55 struct mutex recv_mutex;
1da177e4
LT		 56 int default_retries;
57 unsigned int default_retry_time_ms;
58};
59
609146fd 60static DEFINE_MUTEX(ipmi_mutex);
1da177e4
LT		 61static void file_receive_handler(struct ipmi_recv_msg *msg,
62 void *handler_data)
63{
64 struct ipmi_file_private *priv = handler_data;
65 int was_empty;
66 unsigned long flags;
67
68 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
69
70 was_empty = list_empty(&(priv->recv_msgs));
71 list_add_tail(&(msg->link), &(priv->recv_msgs));
72
73 if (was_empty) {
74 wake_up_interruptible(&priv->wait);
75 kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN);
76 }
77
78 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
79}
80
81static unsigned int ipmi_poll(struct file *file, poll_table *wait)
82{
83 struct ipmi_file_private *priv = file->private_data;
84 unsigned int mask = 0;
85 unsigned long flags;
86
87 poll_wait(file, &priv->wait, wait);
88
89 spin_lock_irqsave(&priv->recv_msg_lock, flags);
90
50c812b2 91 if (!list_empty(&(priv->recv_msgs)))
1da177e4
LT		 92 mask |= (POLLIN | POLLRDNORM);
93
94 spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
95
96 return mask;
97}
98
99static int ipmi_fasync(int fd, struct file *file, int on)
100{
101 struct ipmi_file_private *priv = file->private_data;
102 int result;
103
609146fd 104 mutex_lock(&ipmi_mutex); /* could race against open() otherwise */
1da177e4 105 result = fasync_helper(fd, file, on, &priv->fasync_queue);
609146fd 106 mutex_unlock(&ipmi_mutex);
1da177e4
LT		 107
108 return (result);
109}
110
111static struct ipmi_user_hndl ipmi_hndlrs =
112{
113 .ipmi_recv_hndl = file_receive_handler,
114};
115
116static int ipmi_open(struct inode *inode, struct file *file)
117{
118 int if_num = iminor(inode);
119 int rv;
120 struct ipmi_file_private *priv;
121
122
123 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
124 if (!priv)
125 return -ENOMEM;
126
609146fd 127 mutex_lock(&ipmi_mutex);
1da177e4
LT		 128 priv->file = file;
129
130 rv = ipmi_create_user(if_num,
131 &ipmi_hndlrs,
132 priv,
133 &(priv->user));
134 if (rv) {
135 kfree(priv);
ecc38983 136 goto out;
1da177e4
LT		 137 }
138
139 file->private_data = priv;
140
141 spin_lock_init(&(priv->recv_msg_lock));
142 INIT_LIST_HEAD(&(priv->recv_msgs));
143 init_waitqueue_head(&priv->wait);
144 priv->fasync_queue = NULL;
d6dfd131 145 mutex_init(&priv->recv_mutex);
1da177e4
LT		 146
147 /* Use the low-level defaults. */
148 priv->default_retries = -1;
149 priv->default_retry_time_ms = 0;
150
ecc38983 151out:
609146fd 152 mutex_unlock(&ipmi_mutex);
ecc38983 153 return rv;
1da177e4
LT		 154}
155
156static int ipmi_release(struct inode *inode, struct file *file)
157{
158 struct ipmi_file_private *priv = file->private_data;
159 int rv;
bdf2829c 160 struct ipmi_recv_msg *msg, *next;
1da177e4
LT		 161
162 rv = ipmi_destroy_user(priv->user);
163 if (rv)
164 return rv;
165
bdf2829c
NK		 166 list_for_each_entry_safe(msg, next, &priv->recv_msgs, link)
167 ipmi_free_recv_msg(msg);
168
169
1da177e4
LT		 170 kfree(priv);
171
172 return 0;
173}
174
175static int handle_send_req(ipmi_user_t user,
176 struct ipmi_req *req,
177 int retries,
178 unsigned int retry_time_ms)
179{
180 int rv;
181 struct ipmi_addr addr;
182 struct kernel_ipmi_msg msg;
183
184 if (req->addr_len > sizeof(struct ipmi_addr))
185 return -EINVAL;
186
187 if (copy_from_user(&addr, req->addr, req->addr_len))
188 return -EFAULT;
189
190 msg.netfn = req->msg.netfn;
191 msg.cmd = req->msg.cmd;
192 msg.data_len = req->msg.data_len;
193 msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
194 if (!msg.data)
195 return -ENOMEM;
196
197 /* From here out we cannot return, we must jump to "out" for
198 error exits to free msgdata. */
199
200 rv = ipmi_validate_addr(&addr, req->addr_len);
201 if (rv)
202 goto out;
203
204 if (req->msg.data != NULL) {
205 if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) {
206 rv = -EMSGSIZE;
207 goto out;
208 }
209
210 if (copy_from_user(msg.data,
211 req->msg.data,
212 req->msg.data_len))
213 {
214 rv = -EFAULT;
215 goto out;
216 }
217 } else {
218 msg.data_len = 0;
219 }
220
221 rv = ipmi_request_settime(user,
222 &addr,
223 req->msgid,
224 &msg,
225 NULL,
226 0,
227 retries,
228 retry_time_ms);
229 out:
230 kfree(msg.data);
231 return rv;
232}
233
55929332 234static int ipmi_ioctl(struct file *file,
1da177e4
LT		 235 unsigned int cmd,
236 unsigned long data)
237{
238 int rv = -EINVAL;
239 struct ipmi_file_private *priv = file->private_data;
240 void __user *arg = (void __user *)data;
241
242 switch (cmd)
243 {
244 case IPMICTL_SEND_COMMAND:
245 {
246 struct ipmi_req req;
247
248 if (copy_from_user(&req, arg, sizeof(req))) {
249 rv = -EFAULT;
250 break;
251 }
252
253 rv = handle_send_req(priv->user,
254 &req,
255 priv->default_retries,
256 priv->default_retry_time_ms);
257 break;
258 }
259
260 case IPMICTL_SEND_COMMAND_SETTIME:
261 {
262 struct ipmi_req_settime req;
263
264 if (copy_from_user(&req, arg, sizeof(req))) {
265 rv = -EFAULT;
266 break;
267 }
268
269 rv = handle_send_req(priv->user,
270 &req.req,
271 req.retries,
272 req.retry_time_ms);
273 break;
274 }
275
276 case IPMICTL_RECEIVE_MSG:
277 case IPMICTL_RECEIVE_MSG_TRUNC:
278 {
279 struct ipmi_recv rsp;
280 int addr_len;
281 struct list_head *entry;
282 struct ipmi_recv_msg *msg;
283 unsigned long flags;
284
285
286 rv = 0;
287 if (copy_from_user(&rsp, arg, sizeof(rsp))) {
288 rv = -EFAULT;
289 break;
290 }
291
d6dfd131 292 /* We claim a mutex because we don't want two
1da177e4
LT		 293 users getting something from the queue at a time.
294 Since we have to release the spinlock before we can
295 copy the data to the user, it's possible another
296 user will grab something from the queue, too. Then
297 the messages might get out of order if something
298 fails and the message gets put back onto the
d6dfd131
CM		 299 queue. This mutex prevents that problem. */
300 mutex_lock(&priv->recv_mutex);
1da177e4
LT		 301
302 /* Grab the message off the list. */
303 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
304 if (list_empty(&(priv->recv_msgs))) {
305 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
306 rv = -EAGAIN;
307 goto recv_err;
308 }
309 entry = priv->recv_msgs.next;
310 msg = list_entry(entry, struct ipmi_recv_msg, link);
311 list_del(entry);
312 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
313
314 addr_len = ipmi_addr_length(msg->addr.addr_type);
315 if (rsp.addr_len < addr_len)
316 {
317 rv = -EINVAL;
318 goto recv_putback_on_err;
319 }
320
321 if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) {
322 rv = -EFAULT;
323 goto recv_putback_on_err;
324 }
325 rsp.addr_len = addr_len;
326
327 rsp.recv_type = msg->recv_type;
328 rsp.msgid = msg->msgid;
329 rsp.msg.netfn = msg->msg.netfn;
330 rsp.msg.cmd = msg->msg.cmd;
331
332 if (msg->msg.data_len > 0) {
333 if (rsp.msg.data_len < msg->msg.data_len) {
334 rv = -EMSGSIZE;
335 if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) {
336 msg->msg.data_len = rsp.msg.data_len;
337 } else {
338 goto recv_putback_on_err;
339 }
340 }
341
342 if (copy_to_user(rsp.msg.data,
343 msg->msg.data,
344 msg->msg.data_len))
345 {
346 rv = -EFAULT;
347 goto recv_putback_on_err;
348 }
349 rsp.msg.data_len = msg->msg.data_len;
350 } else {
351 rsp.msg.data_len = 0;
352 }
353
354 if (copy_to_user(arg, &rsp, sizeof(rsp))) {
355 rv = -EFAULT;
356 goto recv_putback_on_err;
357 }
358
d6dfd131 359 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 360 ipmi_free_recv_msg(msg);
361 break;
362
363 recv_putback_on_err:
364 /* If we got an error, put the message back onto
365 the head of the queue. */
366 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
367 list_add(entry, &(priv->recv_msgs));
368 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
d6dfd131 369 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 370 break;
371
372 recv_err:
d6dfd131 373 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 374 break;
375 }
376
377 case IPMICTL_REGISTER_FOR_CMD:
378 {
379 struct ipmi_cmdspec val;
380
381 if (copy_from_user(&val, arg, sizeof(val))) {
382 rv = -EFAULT;
383 break;
384 }
385
c69c3127
CM		 386 rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
387 IPMI_CHAN_ALL);
1da177e4
LT		 388 break;
389 }
390
391 case IPMICTL_UNREGISTER_FOR_CMD:
392 {
393 struct ipmi_cmdspec val;
394
395 if (copy_from_user(&val, arg, sizeof(val))) {
396 rv = -EFAULT;
397 break;
398 }
399
c69c3127
CM		 400 rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
401 IPMI_CHAN_ALL);
402 break;
403 }
404
405 case IPMICTL_REGISTER_FOR_CMD_CHANS:
406 {
407 struct ipmi_cmdspec_chans val;
408
409 if (copy_from_user(&val, arg, sizeof(val))) {
410 rv = -EFAULT;
411 break;
412 }
413
414 rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
415 val.chans);
416 break;
417 }
418
419 case IPMICTL_UNREGISTER_FOR_CMD_CHANS:
420 {
421 struct ipmi_cmdspec_chans val;
422
423 if (copy_from_user(&val, arg, sizeof(val))) {
424 rv = -EFAULT;
425 break;
426 }
427
428 rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
429 val.chans);
1da177e4
LT		 430 break;
431 }
432
433 case IPMICTL_SET_GETS_EVENTS_CMD:
434 {
435 int val;
436
437 if (copy_from_user(&val, arg, sizeof(val))) {
438 rv = -EFAULT;
439 break;
440 }
441
442 rv = ipmi_set_gets_events(priv->user, val);
443 break;
444 }
445
c14979b9 446 /* The next four are legacy, not per-channel. */
1da177e4
LT		 447 case IPMICTL_SET_MY_ADDRESS_CMD:
448 {
449 unsigned int val;
450
451 if (copy_from_user(&val, arg, sizeof(val))) {
452 rv = -EFAULT;
453 break;
454 }
455
c14979b9 456 rv = ipmi_set_my_address(priv->user, 0, val);
1da177e4
LT		 457 break;
458 }
459
460 case IPMICTL_GET_MY_ADDRESS_CMD:
461 {
c14979b9
CM		 462 unsigned int val;
463 unsigned char rval;
464
465 rv = ipmi_get_my_address(priv->user, 0, &rval);
466 if (rv)
467 break;
1da177e4 468
c14979b9 469 val = rval;
1da177e4
LT		 470
471 if (copy_to_user(arg, &val, sizeof(val))) {
472 rv = -EFAULT;
473 break;
474 }
1da177e4
LT		 475 break;
476 }
477
478 case IPMICTL_SET_MY_LUN_CMD:
479 {
480 unsigned int val;
481
482 if (copy_from_user(&val, arg, sizeof(val))) {
483 rv = -EFAULT;
484 break;
485 }
486
c14979b9 487 rv = ipmi_set_my_LUN(priv->user, 0, val);
1da177e4
LT		 488 break;
489 }
490
491 case IPMICTL_GET_MY_LUN_CMD:
492 {
c14979b9
CM		 493 unsigned int val;
494 unsigned char rval;
495
496 rv = ipmi_get_my_LUN(priv->user, 0, &rval);
497 if (rv)
498 break;
1da177e4 499
c14979b9 500 val = rval;
1da177e4
LT		 501
502 if (copy_to_user(arg, &val, sizeof(val))) {
503 rv = -EFAULT;
504 break;
505 }
1da177e4
LT		 506 break;
507 }
c14979b9
CM		 508
509 case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD:
510 {
511 struct ipmi_channel_lun_address_set val;
512
513 if (copy_from_user(&val, arg, sizeof(val))) {
514 rv = -EFAULT;
515 break;
516 }
517
518 return ipmi_set_my_address(priv->user, val.channel, val.value);
519 break;
520 }
521
522 case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
523 {
524 struct ipmi_channel_lun_address_set val;
525
526 if (copy_from_user(&val, arg, sizeof(val))) {
527 rv = -EFAULT;
528 break;
529 }
530
531 rv = ipmi_get_my_address(priv->user, val.channel, &val.value);
532 if (rv)
533 break;
534
535 if (copy_to_user(arg, &val, sizeof(val))) {
536 rv = -EFAULT;
537 break;
538 }
539 break;
540 }
541
542 case IPMICTL_SET_MY_CHANNEL_LUN_CMD:
543 {
544 struct ipmi_channel_lun_address_set val;
545
546 if (copy_from_user(&val, arg, sizeof(val))) {
547 rv = -EFAULT;
548 break;
549 }
550
551 rv = ipmi_set_my_LUN(priv->user, val.channel, val.value);
552 break;
553 }
554
555 case IPMICTL_GET_MY_CHANNEL_LUN_CMD:
556 {
557 struct ipmi_channel_lun_address_set val;
558
559 if (copy_from_user(&val, arg, sizeof(val))) {
560 rv = -EFAULT;
561 break;
562 }
563
564 rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value);
565 if (rv)
566 break;
567
568 if (copy_to_user(arg, &val, sizeof(val))) {
569 rv = -EFAULT;
570 break;
571 }
572 break;
573 }
574
1da177e4
LT		 575 case IPMICTL_SET_TIMING_PARMS_CMD:
576 {
577 struct ipmi_timing_parms parms;
578
579 if (copy_from_user(&parms, arg, sizeof(parms))) {
580 rv = -EFAULT;
581 break;
582 }
583
584 priv->default_retries = parms.retries;
585 priv->default_retry_time_ms = parms.retry_time_ms;
586 rv = 0;
587 break;
588 }
589
590 case IPMICTL_GET_TIMING_PARMS_CMD:
591 {
592 struct ipmi_timing_parms parms;
593
594 parms.retries = priv->default_retries;
595 parms.retry_time_ms = priv->default_retry_time_ms;
596
597 if (copy_to_user(arg, &parms, sizeof(parms))) {
598 rv = -EFAULT;
599 break;
600 }
601
602 rv = 0;
603 break;
604 }
b9675136
CM		 605
606 case IPMICTL_GET_MAINTENANCE_MODE_CMD:
607 {
608 int mode;
609
610 mode = ipmi_get_maintenance_mode(priv->user);
611 if (copy_to_user(arg, &mode, sizeof(mode))) {
612 rv = -EFAULT;
613 break;
614 }
615 rv = 0;
616 break;
617 }
618
619 case IPMICTL_SET_MAINTENANCE_MODE_CMD:
620 {
621 int mode;
622
623 if (copy_from_user(&mode, arg, sizeof(mode))) {
624 rv = -EFAULT;
625 break;
626 }
627 rv = ipmi_set_maintenance_mode(priv->user, mode);
628 break;
629 }
1da177e4
LT		 630 }
631
632 return rv;
633}
634
55929332
AB		 635/*
636 * Note: it doesn't make sense to take the BKL here but
637 * not in compat_ipmi_ioctl. -arnd
638 */
639static long ipmi_unlocked_ioctl(struct file *file,
640 unsigned int cmd,
641 unsigned long data)
642{
643 int ret;
644
609146fd 645 mutex_lock(&ipmi_mutex);
55929332 646 ret = ipmi_ioctl(file, cmd, data);
609146fd 647 mutex_unlock(&ipmi_mutex);
55929332
AB		 648
649 return ret;
650}
651
6a94f920
AM		 652#ifdef CONFIG_COMPAT
653
654/*
655 * The following code contains code for supporting 32-bit compatible
656 * ioctls on 64-bit kernels. This allows running 32-bit apps on the
657 * 64-bit kernel
658 */
659#define COMPAT_IPMICTL_SEND_COMMAND \
660 _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req)
661#define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \
662 _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime)
663#define COMPAT_IPMICTL_RECEIVE_MSG \
664 _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv)
665#define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \
666 _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv)
667
668struct compat_ipmi_msg {
669 u8 netfn;
670 u8 cmd;
671 u16 data_len;
672 compat_uptr_t data;
673};
674
675struct compat_ipmi_req {
676 compat_uptr_t addr;
677 compat_uint_t addr_len;
678 compat_long_t msgid;
679 struct compat_ipmi_msg msg;
680};
681
682struct compat_ipmi_recv {
683 compat_int_t recv_type;
684 compat_uptr_t addr;
685 compat_uint_t addr_len;
686 compat_long_t msgid;
687 struct compat_ipmi_msg msg;
688};
689
690struct compat_ipmi_req_settime {
691 struct compat_ipmi_req req;
692 compat_int_t retries;
693 compat_uint_t retry_time_ms;
694};
695
696/*
697 * Define some helper functions for copying IPMI data
698 */
699static long get_compat_ipmi_msg(struct ipmi_msg *p64,
700 struct compat_ipmi_msg __user *p32)
701{
702 compat_uptr_t tmp;
703
704 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
705 __get_user(p64->netfn, &p32->netfn) ||
706 __get_user(p64->cmd, &p32->cmd) ||
707 __get_user(p64->data_len, &p32->data_len) ||
708 __get_user(tmp, &p32->data))
709 return -EFAULT;
710 p64->data = compat_ptr(tmp);
711 return 0;
712}
713
714static long put_compat_ipmi_msg(struct ipmi_msg *p64,
715 struct compat_ipmi_msg __user *p32)
716{
717 if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
718 __put_user(p64->netfn, &p32->netfn) ||
719 __put_user(p64->cmd, &p32->cmd) ||
720 __put_user(p64->data_len, &p32->data_len))
721 return -EFAULT;
722 return 0;
723}
724
725static long get_compat_ipmi_req(struct ipmi_req *p64,
726 struct compat_ipmi_req __user *p32)
727{
728
729 compat_uptr_t tmp;
730
731 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
732 __get_user(tmp, &p32->addr) ||
733 __get_user(p64->addr_len, &p32->addr_len) ||
734 __get_user(p64->msgid, &p32->msgid) ||
735 get_compat_ipmi_msg(&p64->msg, &p32->msg))
736 return -EFAULT;
737 p64->addr = compat_ptr(tmp);
738 return 0;
739}
740
741static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
742 struct compat_ipmi_req_settime __user *p32)
743{
744 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
745 get_compat_ipmi_req(&p64->req, &p32->req) ||
746 __get_user(p64->retries, &p32->retries) ||
747 __get_user(p64->retry_time_ms, &p32->retry_time_ms))
748 return -EFAULT;
749 return 0;
750}
751
752static long get_compat_ipmi_recv(struct ipmi_recv *p64,
753 struct compat_ipmi_recv __user *p32)
754{
755 compat_uptr_t tmp;
756
757 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
758 __get_user(p64->recv_type, &p32->recv_type) ||
759 __get_user(tmp, &p32->addr) ||
760 __get_user(p64->addr_len, &p32->addr_len) ||
761 __get_user(p64->msgid, &p32->msgid) ||
762 get_compat_ipmi_msg(&p64->msg, &p32->msg))
763 return -EFAULT;
764 p64->addr = compat_ptr(tmp);
765 return 0;
766}
767
768static long put_compat_ipmi_recv(struct ipmi_recv *p64,
769 struct compat_ipmi_recv __user *p32)
770{
771 if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
772 __put_user(p64->recv_type, &p32->recv_type) ||
773 __put_user(p64->addr_len, &p32->addr_len) ||
774 __put_user(p64->msgid, &p32->msgid) ||
775 put_compat_ipmi_msg(&p64->msg, &p32->msg))
776 return -EFAULT;
777 return 0;
778}
779
780/*
781 * Handle compatibility ioctls
782 */
783static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
784 unsigned long arg)
785{
786 int rc;
787 struct ipmi_file_private *priv = filep->private_data;
788
789 switch(cmd) {
790 case COMPAT_IPMICTL_SEND_COMMAND:
791 {
792 struct ipmi_req rp;
793
794 if (get_compat_ipmi_req(&rp, compat_ptr(arg)))
795 return -EFAULT;
796
797 return handle_send_req(priv->user, &rp,
798 priv->default_retries,
799 priv->default_retry_time_ms);
800 }
801 case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
802 {
803 struct ipmi_req_settime sp;
804
805 if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg)))
806 return -EFAULT;
807
808 return handle_send_req(priv->user, &sp.req,
809 sp.retries, sp.retry_time_ms);
810 }
811 case COMPAT_IPMICTL_RECEIVE_MSG:
812 case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC:
813 {
18fb9442
Z		 814 struct ipmi_recv __user *precv64;
815 struct ipmi_recv recv64;
6a94f920 816
fa7df37b 817 memset(&recv64, 0, sizeof(recv64));
6a94f920
AM		 818 if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
819 return -EFAULT;
820
821 precv64 = compat_alloc_user_space(sizeof(recv64));
822 if (copy_to_user(precv64, &recv64, sizeof(recv64)))
823 return -EFAULT;
824
55929332 825 rc = ipmi_ioctl(filep,
6a94f920
AM		 826 ((cmd == COMPAT_IPMICTL_RECEIVE_MSG)
827 ? IPMICTL_RECEIVE_MSG
828 : IPMICTL_RECEIVE_MSG_TRUNC),
18fb9442 829 (unsigned long) precv64);
6a94f920
AM		 830 if (rc != 0)
831 return rc;
832
833 if (copy_from_user(&recv64, precv64, sizeof(recv64)))
834 return -EFAULT;
835
836 if (put_compat_ipmi_recv(&recv64, compat_ptr(arg)))
837 return -EFAULT;
838
839 return rc;
840 }
841 default:
55929332 842 return ipmi_ioctl(filep, cmd, arg);
6a94f920
AM		 843 }
844}
6368087e
BL		 845
846static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
847 unsigned long arg)
848{
849 int ret;
850
851 mutex_lock(&ipmi_mutex);
852 ret = compat_ipmi_ioctl(filep, cmd, arg);
853 mutex_unlock(&ipmi_mutex);
854
855 return ret;
856}
6a94f920 857#endif
1da177e4 858
62322d25 859static const struct file_operations ipmi_fops = {
1da177e4 860 .owner = THIS_MODULE,
55929332 861 .unlocked_ioctl = ipmi_unlocked_ioctl,
6a94f920 862#ifdef CONFIG_COMPAT
6368087e 863 .compat_ioctl = unlocked_compat_ipmi_ioctl,
6a94f920 864#endif
1da177e4
LT		 865 .open = ipmi_open,
866 .release = ipmi_release,
867 .fasync = ipmi_fasync,
868 .poll = ipmi_poll,
6038f373 869 .llseek = noop_llseek,
1da177e4
LT		 870};
871
872#define DEVICE_NAME "ipmidev"
873
0c8204b3 874static int ipmi_major;
1da177e4
LT		 875module_param(ipmi_major, int, 0);
876MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By"
877 " default, or if you set it to zero, it will choose the next"
878 " available device. Setting it to -1 will disable the"
879 " interface. Other values will set the major device number"
880 " to that value.");
881
50c812b2
CM		 882/* Keep track of the devices that are registered. */
883struct ipmi_reg_list {
884 dev_t dev;
885 struct list_head link;
886};
887static LIST_HEAD(reg_list);
888static DEFINE_MUTEX(reg_list_mutex);
889
eb51b650 890static struct class *ipmi_class;
37e0915b 891
50c812b2 892static void ipmi_new_smi(int if_num, struct device *device)
1da177e4 893{
37e0915b 894 dev_t dev = MKDEV(ipmi_major, if_num);
50c812b2 895 struct ipmi_reg_list *entry;
37e0915b 896
50c812b2
CM		 897 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
898 if (!entry) {
899 printk(KERN_ERR "ipmi_devintf: Unable to create the"
900 " ipmi class device link\n");
901 return;
902 }
903 entry->dev = dev;
904
905 mutex_lock(&reg_list_mutex);
03457cd4 906 device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num);
50c812b2
CM		 907 list_add(&entry->link, &reg_list);
908 mutex_unlock(&reg_list_mutex);
1da177e4
LT		 909}
910
911static void ipmi_smi_gone(int if_num)
912{
50c812b2
CM		 913 dev_t dev = MKDEV(ipmi_major, if_num);
914 struct ipmi_reg_list *entry;
915
916 mutex_lock(&reg_list_mutex);
917 list_for_each_entry(entry, &reg_list, link) {
918 if (entry->dev == dev) {
919 list_del(&entry->link);
920 kfree(entry);
921 break;
922 }
923 }
07c015e7 924 device_destroy(ipmi_class, dev);
50c812b2 925 mutex_unlock(&reg_list_mutex);
1da177e4
LT		 926}
927
928static struct ipmi_smi_watcher smi_watcher =
929{
930 .owner = THIS_MODULE,
931 .new_smi = ipmi_new_smi,
932 .smi_gone = ipmi_smi_gone,
933};
934
60ee6d5f 935static int __init init_ipmi_devintf(void)
1da177e4
LT		 936{
937 int rv;
938
939 if (ipmi_major < 0)
940 return -EINVAL;
941
1fdd75bd 942 printk(KERN_INFO "ipmi device interface\n");
1da177e4 943
eb51b650 944 ipmi_class = class_create(THIS_MODULE, "ipmi");
37e0915b
CM		 945 if (IS_ERR(ipmi_class)) {
946 printk(KERN_ERR "ipmi: can't register device class\n");
947 return PTR_ERR(ipmi_class);
948 }
949
1da177e4
LT		 950 rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
951 if (rv < 0) {
eb51b650 952 class_destroy(ipmi_class);
1da177e4
LT		 953 printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major);
954 return rv;
955 }
956
957 if (ipmi_major == 0) {
958 ipmi_major = rv;
959 }
960
1da177e4
LT		 961 rv = ipmi_smi_watcher_register(&smi_watcher);
962 if (rv) {
963 unregister_chrdev(ipmi_major, DEVICE_NAME);
eb51b650 964 class_destroy(ipmi_class);
1da177e4
LT		 965 printk(KERN_WARNING "ipmi: can't register smi watcher\n");
966 return rv;
967 }
968
969 return 0;
970}
971module_init(init_ipmi_devintf);
972
60ee6d5f 973static void __exit cleanup_ipmi(void)
1da177e4 974{
50c812b2
CM		 975 struct ipmi_reg_list *entry, *entry2;
976 mutex_lock(&reg_list_mutex);
977 list_for_each_entry_safe(entry, entry2, &reg_list, link) {
978 list_del(&entry->link);
07c015e7 979 device_destroy(ipmi_class, entry->dev);
50c812b2
CM		 980 kfree(entry);
981 }
982 mutex_unlock(&reg_list_mutex);
eb51b650 983 class_destroy(ipmi_class);
1da177e4 984 ipmi_smi_watcher_unregister(&smi_watcher);
1da177e4
LT		 985 unregister_chrdev(ipmi_major, DEVICE_NAME);
986}
987module_exit(cleanup_ipmi);
988
989MODULE_LICENSE("GPL");
1fdd75bd
CM		 990MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
991MODULE_DESCRIPTION("Linux device interface for the IPMI message handler.");
6c89161b 992MODULE_ALIAS("platform:ipmi_si");
Linux kernel - Deliverables
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