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[net-next-2.6.git] / drivers / char / ipmi / ipmi_devintf.c
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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>
37#include <asm/system.h>
1da177e4 38#include <linux/poll.h>
a99bbaf5 39#include <linux/sched.h>
1da177e4
LT		 40#include <linux/spinlock.h>
41#include <linux/slab.h>
1da177e4 42#include <linux/ipmi.h>
d6dfd131 43#include <linux/mutex.h>
1da177e4 44#include <linux/init.h>
37e0915b 45#include <linux/device.h>
6a94f920 46#include <linux/compat.h>
ecc38983 47#include <linux/smp_lock.h>
1da177e4 48
1da177e4
LT		 49struct ipmi_file_private
50{
51 ipmi_user_t user;
52 spinlock_t recv_msg_lock;
53 struct list_head recv_msgs;
54 struct file *file;
55 struct fasync_struct *fasync_queue;
56 wait_queue_head_t wait;
d6dfd131 57 struct mutex recv_mutex;
1da177e4
LT		 58 int default_retries;
59 unsigned int default_retry_time_ms;
60};
61
62static void file_receive_handler(struct ipmi_recv_msg *msg,
63 void *handler_data)
64{
65 struct ipmi_file_private *priv = handler_data;
66 int was_empty;
67 unsigned long flags;
68
69 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
70
71 was_empty = list_empty(&(priv->recv_msgs));
72 list_add_tail(&(msg->link), &(priv->recv_msgs));
73
74 if (was_empty) {
75 wake_up_interruptible(&priv->wait);
76 kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN);
77 }
78
79 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
80}
81
82static unsigned int ipmi_poll(struct file *file, poll_table *wait)
83{
84 struct ipmi_file_private *priv = file->private_data;
85 unsigned int mask = 0;
86 unsigned long flags;
87
88 poll_wait(file, &priv->wait, wait);
89
90 spin_lock_irqsave(&priv->recv_msg_lock, flags);
91
50c812b2 92 if (!list_empty(&(priv->recv_msgs)))
1da177e4
LT		 93 mask |= (POLLIN | POLLRDNORM);
94
95 spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
96
97 return mask;
98}
99
100static int ipmi_fasync(int fd, struct file *file, int on)
101{
102 struct ipmi_file_private *priv = file->private_data;
103 int result;
104
70b028b7 105 lock_kernel(); /* could race against open() otherwise */
1da177e4 106 result = fasync_helper(fd, file, on, &priv->fasync_queue);
70b028b7 107 unlock_kernel();
1da177e4
LT		 108
109 return (result);
110}
111
112static struct ipmi_user_hndl ipmi_hndlrs =
113{
114 .ipmi_recv_hndl = file_receive_handler,
115};
116
117static int ipmi_open(struct inode *inode, struct file *file)
118{
119 int if_num = iminor(inode);
120 int rv;
121 struct ipmi_file_private *priv;
122
123
124 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
125 if (!priv)
126 return -ENOMEM;
127
ecc38983 128 lock_kernel();
1da177e4
LT		 129 priv->file = file;
130
131 rv = ipmi_create_user(if_num,
132 &ipmi_hndlrs,
133 priv,
134 &(priv->user));
135 if (rv) {
136 kfree(priv);
ecc38983 137 goto out;
1da177e4
LT		 138 }
139
140 file->private_data = priv;
141
142 spin_lock_init(&(priv->recv_msg_lock));
143 INIT_LIST_HEAD(&(priv->recv_msgs));
144 init_waitqueue_head(&priv->wait);
145 priv->fasync_queue = NULL;
d6dfd131 146 mutex_init(&priv->recv_mutex);
1da177e4
LT		 147
148 /* Use the low-level defaults. */
149 priv->default_retries = -1;
150 priv->default_retry_time_ms = 0;
151
ecc38983
JC		 152out:
153 unlock_kernel();
154 return rv;
1da177e4
LT		 155}
156
157static int ipmi_release(struct inode *inode, struct file *file)
158{
159 struct ipmi_file_private *priv = file->private_data;
160 int rv;
161
162 rv = ipmi_destroy_user(priv->user);
163 if (rv)
164 return rv;
165
1da177e4
LT		 166 /* FIXME - free the messages in the list. */
167 kfree(priv);
168
169 return 0;
170}
171
172static int handle_send_req(ipmi_user_t user,
173 struct ipmi_req *req,
174 int retries,
175 unsigned int retry_time_ms)
176{
177 int rv;
178 struct ipmi_addr addr;
179 struct kernel_ipmi_msg msg;
180
181 if (req->addr_len > sizeof(struct ipmi_addr))
182 return -EINVAL;
183
184 if (copy_from_user(&addr, req->addr, req->addr_len))
185 return -EFAULT;
186
187 msg.netfn = req->msg.netfn;
188 msg.cmd = req->msg.cmd;
189 msg.data_len = req->msg.data_len;
190 msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
191 if (!msg.data)
192 return -ENOMEM;
193
194 /* From here out we cannot return, we must jump to "out" for
195 error exits to free msgdata. */
196
197 rv = ipmi_validate_addr(&addr, req->addr_len);
198 if (rv)
199 goto out;
200
201 if (req->msg.data != NULL) {
202 if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) {
203 rv = -EMSGSIZE;
204 goto out;
205 }
206
207 if (copy_from_user(msg.data,
208 req->msg.data,
209 req->msg.data_len))
210 {
211 rv = -EFAULT;
212 goto out;
213 }
214 } else {
215 msg.data_len = 0;
216 }
217
218 rv = ipmi_request_settime(user,
219 &addr,
220 req->msgid,
221 &msg,
222 NULL,
223 0,
224 retries,
225 retry_time_ms);
226 out:
227 kfree(msg.data);
228 return rv;
229}
230
55929332 231static int ipmi_ioctl(struct file *file,
1da177e4
LT		 232 unsigned int cmd,
233 unsigned long data)
234{
235 int rv = -EINVAL;
236 struct ipmi_file_private *priv = file->private_data;
237 void __user *arg = (void __user *)data;
238
239 switch (cmd)
240 {
241 case IPMICTL_SEND_COMMAND:
242 {
243 struct ipmi_req req;
244
245 if (copy_from_user(&req, arg, sizeof(req))) {
246 rv = -EFAULT;
247 break;
248 }
249
250 rv = handle_send_req(priv->user,
251 &req,
252 priv->default_retries,
253 priv->default_retry_time_ms);
254 break;
255 }
256
257 case IPMICTL_SEND_COMMAND_SETTIME:
258 {
259 struct ipmi_req_settime req;
260
261 if (copy_from_user(&req, arg, sizeof(req))) {
262 rv = -EFAULT;
263 break;
264 }
265
266 rv = handle_send_req(priv->user,
267 &req.req,
268 req.retries,
269 req.retry_time_ms);
270 break;
271 }
272
273 case IPMICTL_RECEIVE_MSG:
274 case IPMICTL_RECEIVE_MSG_TRUNC:
275 {
276 struct ipmi_recv rsp;
277 int addr_len;
278 struct list_head *entry;
279 struct ipmi_recv_msg *msg;
280 unsigned long flags;
281
282
283 rv = 0;
284 if (copy_from_user(&rsp, arg, sizeof(rsp))) {
285 rv = -EFAULT;
286 break;
287 }
288
d6dfd131 289 /* We claim a mutex because we don't want two
1da177e4
LT		 290 users getting something from the queue at a time.
291 Since we have to release the spinlock before we can
292 copy the data to the user, it's possible another
293 user will grab something from the queue, too. Then
294 the messages might get out of order if something
295 fails and the message gets put back onto the
d6dfd131
CM		 296 queue. This mutex prevents that problem. */
297 mutex_lock(&priv->recv_mutex);
1da177e4
LT		 298
299 /* Grab the message off the list. */
300 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
301 if (list_empty(&(priv->recv_msgs))) {
302 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
303 rv = -EAGAIN;
304 goto recv_err;
305 }
306 entry = priv->recv_msgs.next;
307 msg = list_entry(entry, struct ipmi_recv_msg, link);
308 list_del(entry);
309 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
310
311 addr_len = ipmi_addr_length(msg->addr.addr_type);
312 if (rsp.addr_len < addr_len)
313 {
314 rv = -EINVAL;
315 goto recv_putback_on_err;
316 }
317
318 if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) {
319 rv = -EFAULT;
320 goto recv_putback_on_err;
321 }
322 rsp.addr_len = addr_len;
323
324 rsp.recv_type = msg->recv_type;
325 rsp.msgid = msg->msgid;
326 rsp.msg.netfn = msg->msg.netfn;
327 rsp.msg.cmd = msg->msg.cmd;
328
329 if (msg->msg.data_len > 0) {
330 if (rsp.msg.data_len < msg->msg.data_len) {
331 rv = -EMSGSIZE;
332 if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) {
333 msg->msg.data_len = rsp.msg.data_len;
334 } else {
335 goto recv_putback_on_err;
336 }
337 }
338
339 if (copy_to_user(rsp.msg.data,
340 msg->msg.data,
341 msg->msg.data_len))
342 {
343 rv = -EFAULT;
344 goto recv_putback_on_err;
345 }
346 rsp.msg.data_len = msg->msg.data_len;
347 } else {
348 rsp.msg.data_len = 0;
349 }
350
351 if (copy_to_user(arg, &rsp, sizeof(rsp))) {
352 rv = -EFAULT;
353 goto recv_putback_on_err;
354 }
355
d6dfd131 356 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 357 ipmi_free_recv_msg(msg);
358 break;
359
360 recv_putback_on_err:
361 /* If we got an error, put the message back onto
362 the head of the queue. */
363 spin_lock_irqsave(&(priv->recv_msg_lock), flags);
364 list_add(entry, &(priv->recv_msgs));
365 spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
d6dfd131 366 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 367 break;
368
369 recv_err:
d6dfd131 370 mutex_unlock(&priv->recv_mutex);
1da177e4
LT		 371 break;
372 }
373
374 case IPMICTL_REGISTER_FOR_CMD:
375 {
376 struct ipmi_cmdspec val;
377
378 if (copy_from_user(&val, arg, sizeof(val))) {
379 rv = -EFAULT;
380 break;
381 }
382
c69c3127
CM		 383 rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
384 IPMI_CHAN_ALL);
1da177e4
LT		 385 break;
386 }
387
388 case IPMICTL_UNREGISTER_FOR_CMD:
389 {
390 struct ipmi_cmdspec val;
391
392 if (copy_from_user(&val, arg, sizeof(val))) {
393 rv = -EFAULT;
394 break;
395 }
396
c69c3127
CM		 397 rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
398 IPMI_CHAN_ALL);
399 break;
400 }
401
402 case IPMICTL_REGISTER_FOR_CMD_CHANS:
403 {
404 struct ipmi_cmdspec_chans val;
405
406 if (copy_from_user(&val, arg, sizeof(val))) {
407 rv = -EFAULT;
408 break;
409 }
410
411 rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
412 val.chans);
413 break;
414 }
415
416 case IPMICTL_UNREGISTER_FOR_CMD_CHANS:
417 {
418 struct ipmi_cmdspec_chans val;
419
420 if (copy_from_user(&val, arg, sizeof(val))) {
421 rv = -EFAULT;
422 break;
423 }
424
425 rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
426 val.chans);
1da177e4
LT		 427 break;
428 }
429
430 case IPMICTL_SET_GETS_EVENTS_CMD:
431 {
432 int val;
433
434 if (copy_from_user(&val, arg, sizeof(val))) {
435 rv = -EFAULT;
436 break;
437 }
438
439 rv = ipmi_set_gets_events(priv->user, val);
440 break;
441 }
442
c14979b9 443 /* The next four are legacy, not per-channel. */
1da177e4
LT		 444 case IPMICTL_SET_MY_ADDRESS_CMD:
445 {
446 unsigned int val;
447
448 if (copy_from_user(&val, arg, sizeof(val))) {
449 rv = -EFAULT;
450 break;
451 }
452
c14979b9 453 rv = ipmi_set_my_address(priv->user, 0, val);
1da177e4
LT		 454 break;
455 }
456
457 case IPMICTL_GET_MY_ADDRESS_CMD:
458 {
c14979b9
CM		 459 unsigned int val;
460 unsigned char rval;
461
462 rv = ipmi_get_my_address(priv->user, 0, &rval);
463 if (rv)
464 break;
1da177e4 465
c14979b9 466 val = rval;
1da177e4
LT		 467
468 if (copy_to_user(arg, &val, sizeof(val))) {
469 rv = -EFAULT;
470 break;
471 }
1da177e4
LT		 472 break;
473 }
474
475 case IPMICTL_SET_MY_LUN_CMD:
476 {
477 unsigned int val;
478
479 if (copy_from_user(&val, arg, sizeof(val))) {
480 rv = -EFAULT;
481 break;
482 }
483
c14979b9 484 rv = ipmi_set_my_LUN(priv->user, 0, val);
1da177e4
LT		 485 break;
486 }
487
488 case IPMICTL_GET_MY_LUN_CMD:
489 {
c14979b9
CM		 490 unsigned int val;
491 unsigned char rval;
492
493 rv = ipmi_get_my_LUN(priv->user, 0, &rval);
494 if (rv)
495 break;
1da177e4 496
c14979b9 497 val = rval;
1da177e4
LT		 498
499 if (copy_to_user(arg, &val, sizeof(val))) {
500 rv = -EFAULT;
501 break;
502 }
1da177e4
LT		 503 break;
504 }
c14979b9
CM		 505
506 case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD:
507 {
508 struct ipmi_channel_lun_address_set val;
509
510 if (copy_from_user(&val, arg, sizeof(val))) {
511 rv = -EFAULT;
512 break;
513 }
514
515 return ipmi_set_my_address(priv->user, val.channel, val.value);
516 break;
517 }
518
519 case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
520 {
521 struct ipmi_channel_lun_address_set val;
522
523 if (copy_from_user(&val, arg, sizeof(val))) {
524 rv = -EFAULT;
525 break;
526 }
527
528 rv = ipmi_get_my_address(priv->user, val.channel, &val.value);
529 if (rv)
530 break;
531
532 if (copy_to_user(arg, &val, sizeof(val))) {
533 rv = -EFAULT;
534 break;
535 }
536 break;
537 }
538
539 case IPMICTL_SET_MY_CHANNEL_LUN_CMD:
540 {
541 struct ipmi_channel_lun_address_set val;
542
543 if (copy_from_user(&val, arg, sizeof(val))) {
544 rv = -EFAULT;
545 break;
546 }
547
548 rv = ipmi_set_my_LUN(priv->user, val.channel, val.value);
549 break;
550 }
551
552 case IPMICTL_GET_MY_CHANNEL_LUN_CMD:
553 {
554 struct ipmi_channel_lun_address_set val;
555
556 if (copy_from_user(&val, arg, sizeof(val))) {
557 rv = -EFAULT;
558 break;
559 }
560
561 rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value);
562 if (rv)
563 break;
564
565 if (copy_to_user(arg, &val, sizeof(val))) {
566 rv = -EFAULT;
567 break;
568 }
569 break;
570 }
571
1da177e4
LT		 572 case IPMICTL_SET_TIMING_PARMS_CMD:
573 {
574 struct ipmi_timing_parms parms;
575
576 if (copy_from_user(&parms, arg, sizeof(parms))) {
577 rv = -EFAULT;
578 break;
579 }
580
581 priv->default_retries = parms.retries;
582 priv->default_retry_time_ms = parms.retry_time_ms;
583 rv = 0;
584 break;
585 }
586
587 case IPMICTL_GET_TIMING_PARMS_CMD:
588 {
589 struct ipmi_timing_parms parms;
590
591 parms.retries = priv->default_retries;
592 parms.retry_time_ms = priv->default_retry_time_ms;
593
594 if (copy_to_user(arg, &parms, sizeof(parms))) {
595 rv = -EFAULT;
596 break;
597 }
598
599 rv = 0;
600 break;
601 }
b9675136
CM		 602
603 case IPMICTL_GET_MAINTENANCE_MODE_CMD:
604 {
605 int mode;
606
607 mode = ipmi_get_maintenance_mode(priv->user);
608 if (copy_to_user(arg, &mode, sizeof(mode))) {
609 rv = -EFAULT;
610 break;
611 }
612 rv = 0;
613 break;
614 }
615
616 case IPMICTL_SET_MAINTENANCE_MODE_CMD:
617 {
618 int mode;
619
620 if (copy_from_user(&mode, arg, sizeof(mode))) {
621 rv = -EFAULT;
622 break;
623 }
624 rv = ipmi_set_maintenance_mode(priv->user, mode);
625 break;
626 }
1da177e4
LT		 627 }
628
629 return rv;
630}
631
55929332
AB		 632/*
633 * Note: it doesn't make sense to take the BKL here but
634 * not in compat_ipmi_ioctl. -arnd
635 */
636static long ipmi_unlocked_ioctl(struct file *file,
637 unsigned int cmd,
638 unsigned long data)
639{
640 int ret;
641
642 lock_kernel();
643 ret = ipmi_ioctl(file, cmd, data);
644 unlock_kernel();
645
646 return ret;
647}
648
6a94f920
AM		 649#ifdef CONFIG_COMPAT
650
651/*
652 * The following code contains code for supporting 32-bit compatible
653 * ioctls on 64-bit kernels. This allows running 32-bit apps on the
654 * 64-bit kernel
655 */
656#define COMPAT_IPMICTL_SEND_COMMAND \
657 _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req)
658#define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \
659 _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime)
660#define COMPAT_IPMICTL_RECEIVE_MSG \
661 _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv)
662#define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \
663 _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv)
664
665struct compat_ipmi_msg {
666 u8 netfn;
667 u8 cmd;
668 u16 data_len;
669 compat_uptr_t data;
670};
671
672struct compat_ipmi_req {
673 compat_uptr_t addr;
674 compat_uint_t addr_len;
675 compat_long_t msgid;
676 struct compat_ipmi_msg msg;
677};
678
679struct compat_ipmi_recv {
680 compat_int_t recv_type;
681 compat_uptr_t addr;
682 compat_uint_t addr_len;
683 compat_long_t msgid;
684 struct compat_ipmi_msg msg;
685};
686
687struct compat_ipmi_req_settime {
688 struct compat_ipmi_req req;
689 compat_int_t retries;
690 compat_uint_t retry_time_ms;
691};
692
693/*
694 * Define some helper functions for copying IPMI data
695 */
696static long get_compat_ipmi_msg(struct ipmi_msg *p64,
697 struct compat_ipmi_msg __user *p32)
698{
699 compat_uptr_t tmp;
700
701 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
702 __get_user(p64->netfn, &p32->netfn) ||
703 __get_user(p64->cmd, &p32->cmd) ||
704 __get_user(p64->data_len, &p32->data_len) ||
705 __get_user(tmp, &p32->data))
706 return -EFAULT;
707 p64->data = compat_ptr(tmp);
708 return 0;
709}
710
711static long put_compat_ipmi_msg(struct ipmi_msg *p64,
712 struct compat_ipmi_msg __user *p32)
713{
714 if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
715 __put_user(p64->netfn, &p32->netfn) ||
716 __put_user(p64->cmd, &p32->cmd) ||
717 __put_user(p64->data_len, &p32->data_len))
718 return -EFAULT;
719 return 0;
720}
721
722static long get_compat_ipmi_req(struct ipmi_req *p64,
723 struct compat_ipmi_req __user *p32)
724{
725
726 compat_uptr_t tmp;
727
728 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
729 __get_user(tmp, &p32->addr) ||
730 __get_user(p64->addr_len, &p32->addr_len) ||
731 __get_user(p64->msgid, &p32->msgid) ||
732 get_compat_ipmi_msg(&p64->msg, &p32->msg))
733 return -EFAULT;
734 p64->addr = compat_ptr(tmp);
735 return 0;
736}
737
738static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
739 struct compat_ipmi_req_settime __user *p32)
740{
741 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
742 get_compat_ipmi_req(&p64->req, &p32->req) ||
743 __get_user(p64->retries, &p32->retries) ||
744 __get_user(p64->retry_time_ms, &p32->retry_time_ms))
745 return -EFAULT;
746 return 0;
747}
748
749static long get_compat_ipmi_recv(struct ipmi_recv *p64,
750 struct compat_ipmi_recv __user *p32)
751{
752 compat_uptr_t tmp;
753
754 if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
755 __get_user(p64->recv_type, &p32->recv_type) ||
756 __get_user(tmp, &p32->addr) ||
757 __get_user(p64->addr_len, &p32->addr_len) ||
758 __get_user(p64->msgid, &p32->msgid) ||
759 get_compat_ipmi_msg(&p64->msg, &p32->msg))
760 return -EFAULT;
761 p64->addr = compat_ptr(tmp);
762 return 0;
763}
764
765static long put_compat_ipmi_recv(struct ipmi_recv *p64,
766 struct compat_ipmi_recv __user *p32)
767{
768 if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
769 __put_user(p64->recv_type, &p32->recv_type) ||
770 __put_user(p64->addr_len, &p32->addr_len) ||
771 __put_user(p64->msgid, &p32->msgid) ||
772 put_compat_ipmi_msg(&p64->msg, &p32->msg))
773 return -EFAULT;
774 return 0;
775}
776
777/*
778 * Handle compatibility ioctls
779 */
780static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
781 unsigned long arg)
782{
783 int rc;
784 struct ipmi_file_private *priv = filep->private_data;
785
786 switch(cmd) {
787 case COMPAT_IPMICTL_SEND_COMMAND:
788 {
789 struct ipmi_req rp;
790
791 if (get_compat_ipmi_req(&rp, compat_ptr(arg)))
792 return -EFAULT;
793
794 return handle_send_req(priv->user, &rp,
795 priv->default_retries,
796 priv->default_retry_time_ms);
797 }
798 case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
799 {
800 struct ipmi_req_settime sp;
801
802 if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg)))
803 return -EFAULT;
804
805 return handle_send_req(priv->user, &sp.req,
806 sp.retries, sp.retry_time_ms);
807 }
808 case COMPAT_IPMICTL_RECEIVE_MSG:
809 case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC:
810 {
18fb9442
AV		 811 struct ipmi_recv __user *precv64;
812 struct ipmi_recv recv64;
6a94f920
AM		 813
814 if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
815 return -EFAULT;
816
817 precv64 = compat_alloc_user_space(sizeof(recv64));
818 if (copy_to_user(precv64, &recv64, sizeof(recv64)))
819 return -EFAULT;
820
55929332 821 rc = ipmi_ioctl(filep,
6a94f920
AM		 822 ((cmd == COMPAT_IPMICTL_RECEIVE_MSG)
823 ? IPMICTL_RECEIVE_MSG
824 : IPMICTL_RECEIVE_MSG_TRUNC),
18fb9442 825 (unsigned long) precv64);
6a94f920
AM		 826 if (rc != 0)
827 return rc;
828
829 if (copy_from_user(&recv64, precv64, sizeof(recv64)))
830 return -EFAULT;
831
832 if (put_compat_ipmi_recv(&recv64, compat_ptr(arg)))
833 return -EFAULT;
834
835 return rc;
836 }
837 default:
55929332 838 return ipmi_ioctl(filep, cmd, arg);
6a94f920
AM		 839 }
840}
841#endif
1da177e4 842
62322d25 843static const struct file_operations ipmi_fops = {
1da177e4 844 .owner = THIS_MODULE,
55929332 845 .unlocked_ioctl = ipmi_unlocked_ioctl,
6a94f920
AM		 846#ifdef CONFIG_COMPAT
847 .compat_ioctl = compat_ipmi_ioctl,
848#endif
1da177e4
LT		 849 .open = ipmi_open,
850 .release = ipmi_release,
851 .fasync = ipmi_fasync,
852 .poll = ipmi_poll,
6038f373 853 .llseek = noop_llseek,
1da177e4
LT		 854};
855
856#define DEVICE_NAME "ipmidev"
857
0c8204b3 858static int ipmi_major;
1da177e4
LT		 859module_param(ipmi_major, int, 0);
860MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By"
861 " default, or if you set it to zero, it will choose the next"
862 " available device. Setting it to -1 will disable the"
863 " interface. Other values will set the major device number"
864 " to that value.");
865
50c812b2
CM		 866/* Keep track of the devices that are registered. */
867struct ipmi_reg_list {
868 dev_t dev;
869 struct list_head link;
870};
871static LIST_HEAD(reg_list);
872static DEFINE_MUTEX(reg_list_mutex);
873
eb51b650 874static struct class *ipmi_class;
37e0915b 875
50c812b2 876static void ipmi_new_smi(int if_num, struct device *device)
1da177e4 877{
37e0915b 878 dev_t dev = MKDEV(ipmi_major, if_num);
50c812b2 879 struct ipmi_reg_list *entry;
37e0915b 880
50c812b2
CM		 881 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
882 if (!entry) {
883 printk(KERN_ERR "ipmi_devintf: Unable to create the"
884 " ipmi class device link\n");
885 return;
886 }
887 entry->dev = dev;
888
889 mutex_lock(&reg_list_mutex);
03457cd4 890 device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num);
50c812b2
CM		 891 list_add(&entry->link, &reg_list);
892 mutex_unlock(&reg_list_mutex);
1da177e4
LT		 893}
894
895static void ipmi_smi_gone(int if_num)
896{
50c812b2
CM		 897 dev_t dev = MKDEV(ipmi_major, if_num);
898 struct ipmi_reg_list *entry;
899
900 mutex_lock(&reg_list_mutex);
901 list_for_each_entry(entry, &reg_list, link) {
902 if (entry->dev == dev) {
903 list_del(&entry->link);
904 kfree(entry);
905 break;
906 }
907 }
07c015e7 908 device_destroy(ipmi_class, dev);
50c812b2 909 mutex_unlock(&reg_list_mutex);
1da177e4
LT		 910}
911
912static struct ipmi_smi_watcher smi_watcher =
913{
914 .owner = THIS_MODULE,
915 .new_smi = ipmi_new_smi,
916 .smi_gone = ipmi_smi_gone,
917};
918
919static __init int init_ipmi_devintf(void)
920{
921 int rv;
922
923 if (ipmi_major < 0)
924 return -EINVAL;
925
1fdd75bd 926 printk(KERN_INFO "ipmi device interface\n");
1da177e4 927
eb51b650 928 ipmi_class = class_create(THIS_MODULE, "ipmi");
37e0915b
CM		 929 if (IS_ERR(ipmi_class)) {
930 printk(KERN_ERR "ipmi: can't register device class\n");
931 return PTR_ERR(ipmi_class);
932 }
933
1da177e4
LT		 934 rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
935 if (rv < 0) {
eb51b650 936 class_destroy(ipmi_class);
1da177e4
LT		 937 printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major);
938 return rv;
939 }
940
941 if (ipmi_major == 0) {
942 ipmi_major = rv;
943 }
944
1da177e4
LT		 945 rv = ipmi_smi_watcher_register(&smi_watcher);
946 if (rv) {
947 unregister_chrdev(ipmi_major, DEVICE_NAME);
eb51b650 948 class_destroy(ipmi_class);
1da177e4
LT		 949 printk(KERN_WARNING "ipmi: can't register smi watcher\n");
950 return rv;
951 }
952
953 return 0;
954}
955module_init(init_ipmi_devintf);
956
957static __exit void cleanup_ipmi(void)
958{
50c812b2
CM		 959 struct ipmi_reg_list *entry, *entry2;
960 mutex_lock(&reg_list_mutex);
961 list_for_each_entry_safe(entry, entry2, &reg_list, link) {
962 list_del(&entry->link);
07c015e7 963 device_destroy(ipmi_class, entry->dev);
50c812b2
CM		 964 kfree(entry);
965 }
966 mutex_unlock(&reg_list_mutex);
eb51b650 967 class_destroy(ipmi_class);
1da177e4 968 ipmi_smi_watcher_unregister(&smi_watcher);
1da177e4
LT		 969 unregister_chrdev(ipmi_major, DEVICE_NAME);
970}
971module_exit(cleanup_ipmi);
972
973MODULE_LICENSE("GPL");
1fdd75bd
CM		 974MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
975MODULE_DESCRIPTION("Linux device interface for the IPMI message handler.");
6c89161b 976MODULE_ALIAS("platform:ipmi_si");
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