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[PATCH] Notifier chain update: API changes
[linux-2.6-block.git] / drivers / char / ipmi / ipmi_msghandler.c
CommitLineData
1da177e4
LT		 1/*
2 * ipmi_msghandler.c
3 *
4 * Incoming and outgoing message routing for an IPMI interface.
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
34#include <linux/config.h>
35#include <linux/module.h>
36#include <linux/errno.h>
37#include <asm/system.h>
38#include <linux/sched.h>
39#include <linux/poll.h>
40#include <linux/spinlock.h>
1da177e4
LT		 41#include <linux/slab.h>
42#include <linux/ipmi.h>
43#include <linux/ipmi_smi.h>
44#include <linux/notifier.h>
45#include <linux/init.h>
46#include <linux/proc_fs.h>
393d2cc3 47#include <linux/rcupdate.h>
1da177e4
LT		 48
49#define PFX "IPMI message handler: "
1fdd75bd 50
a23f9a3c 51#define IPMI_DRIVER_VERSION "39.0"
1da177e4
LT		 52
53static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
54static int ipmi_init_msghandler(void);
55
56static int initialized = 0;
57
3b625943
CM		 58#ifdef CONFIG_PROC_FS
59struct proc_dir_entry *proc_ipmi_root = NULL;
be4f1bb2 60EXPORT_SYMBOL(proc_ipmi_root);
3b625943 61#endif /* CONFIG_PROC_FS */
1da177e4
LT		 62
63#define MAX_EVENTS_IN_QUEUE 25
64
65/* Don't let a message sit in a queue forever, always time it with at lest
66 the max message timer. This is in milliseconds. */
67#define MAX_MSG_TIMEOUT 60000
68
393d2cc3
CM		 69
70/*
71 * The main "user" data structure.
72 */
1da177e4
LT		 73struct ipmi_user
74{
75 struct list_head link;
76
393d2cc3
CM		 77 /* Set to "0" when the user is destroyed. */
78 int valid;
79
80 struct kref refcount;
81
1da177e4
LT		 82 /* The upper layer that handles receive messages. */
83 struct ipmi_user_hndl *handler;
84 void *handler_data;
85
86 /* The interface this user is bound to. */
87 ipmi_smi_t intf;
88
89 /* Does this interface receive IPMI events? */
90 int gets_events;
91};
92
93struct cmd_rcvr
94{
95 struct list_head link;
96
97 ipmi_user_t user;
98 unsigned char netfn;
99 unsigned char cmd;
393d2cc3
CM		 100
101 /*
102 * This is used to form a linked lised during mass deletion.
103 * Since this is in an RCU list, we cannot use the link above
104 * or change any data until the RCU period completes. So we
105 * use this next variable during mass deletion so we can have
106 * a list and don't have to wait and restart the search on
107 * every individual deletion of a command. */
108 struct cmd_rcvr *next;
1da177e4
LT		 109};
110
111struct seq_table
112{
113 unsigned int inuse : 1;
114 unsigned int broadcast : 1;
115
116 unsigned long timeout;
117 unsigned long orig_timeout;
118 unsigned int retries_left;
119
120 /* To verify on an incoming send message response that this is
121 the message that the response is for, we keep a sequence id
122 and increment it every time we send a message. */
123 long seqid;
124
125 /* This is held so we can properly respond to the message on a
126 timeout, and it is used to hold the temporary data for
127 retransmission, too. */
128 struct ipmi_recv_msg *recv_msg;
129};
130
131/* Store the information in a msgid (long) to allow us to find a
132 sequence table entry from the msgid. */
133#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
134
135#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
136 do { \
137 seq = ((msgid >> 26) & 0x3f); \
138 seqid = (msgid & 0x3fffff); \
e8b33617 139 } while (0)
1da177e4
LT		 140
141#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
142
143struct ipmi_channel
144{
145 unsigned char medium;
146 unsigned char protocol;
c14979b9
CM		 147
148 /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
149 but may be changed by the user. */
150 unsigned char address;
151
152 /* My LUN. This should generally stay the SMS LUN, but just in
153 case... */
154 unsigned char lun;
1da177e4
LT		 155};
156
3b625943 157#ifdef CONFIG_PROC_FS
1da177e4
LT		 158struct ipmi_proc_entry
159{
160 char *name;
161 struct ipmi_proc_entry *next;
162};
3b625943 163#endif
1da177e4 164
50c812b2
CM		 165struct bmc_device
166{
167 struct platform_device *dev;
168 struct ipmi_device_id id;
169 unsigned char guid[16];
170 int guid_set;
171
172 struct kref refcount;
173
174 /* bmc device attributes */
175 struct device_attribute device_id_attr;
176 struct device_attribute provides_dev_sdrs_attr;
177 struct device_attribute revision_attr;
178 struct device_attribute firmware_rev_attr;
179 struct device_attribute version_attr;
180 struct device_attribute add_dev_support_attr;
181 struct device_attribute manufacturer_id_attr;
182 struct device_attribute product_id_attr;
183 struct device_attribute guid_attr;
184 struct device_attribute aux_firmware_rev_attr;
185};
186
1da177e4 187#define IPMI_IPMB_NUM_SEQ 64
c14979b9 188#define IPMI_MAX_CHANNELS 16
1da177e4
LT		 189struct ipmi_smi
190{
191 /* What interface number are we? */
192 int intf_num;
193
393d2cc3
CM		 194 struct kref refcount;
195
196 /* The list of upper layers that are using me. seq_lock
197 * protects this. */
198 struct list_head users;
1da177e4
LT		 199
200 /* Used for wake ups at startup. */
201 wait_queue_head_t waitq;
202
50c812b2
CM		 203 struct bmc_device *bmc;
204 char *my_dev_name;
1da177e4
LT		 205
206 /* This is the lower-layer's sender routine. */
207 struct ipmi_smi_handlers *handlers;
208 void *send_info;
209
3b625943 210#ifdef CONFIG_PROC_FS
1da177e4
LT		 211 /* A list of proc entries for this interface. This does not
212 need a lock, only one thread creates it and only one thread
213 destroys it. */
3b625943 214 spinlock_t proc_entry_lock;
1da177e4 215 struct ipmi_proc_entry *proc_entries;
3b625943 216#endif
1da177e4 217
50c812b2
CM		 218 /* Driver-model device for the system interface. */
219 struct device *si_dev;
220
1da177e4
LT		 221 /* A table of sequence numbers for this interface. We use the
222 sequence numbers for IPMB messages that go out of the
223 interface to match them up with their responses. A routine
224 is called periodically to time the items in this list. */
225 spinlock_t seq_lock;
226 struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
227 int curr_seq;
228
229 /* Messages that were delayed for some reason (out of memory,
230 for instance), will go in here to be processed later in a
231 periodic timer interrupt. */
232 spinlock_t waiting_msgs_lock;
233 struct list_head waiting_msgs;
234
235 /* The list of command receivers that are registered for commands
236 on this interface. */
e61fb5b6 237 struct semaphore cmd_rcvrs_lock;
1da177e4
LT		 238 struct list_head cmd_rcvrs;
239
240 /* Events that were queues because no one was there to receive
241 them. */
242 spinlock_t events_lock; /* For dealing with event stuff. */
243 struct list_head waiting_events;
244 unsigned int waiting_events_count; /* How many events in queue? */
245
1da177e4
LT		 246 /* The event receiver for my BMC, only really used at panic
247 shutdown as a place to store this. */
248 unsigned char event_receiver;
249 unsigned char event_receiver_lun;
250 unsigned char local_sel_device;
251 unsigned char local_event_generator;
252
253 /* A cheap hack, if this is non-null and a message to an
254 interface comes in with a NULL user, call this routine with
255 it. Note that the message will still be freed by the
256 caller. This only works on the system interface. */
56a55ec6 257 void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
1da177e4
LT		 258
259 /* When we are scanning the channels for an SMI, this will
260 tell which channel we are scanning. */
261 int curr_channel;
262
263 /* Channel information */
264 struct ipmi_channel channels[IPMI_MAX_CHANNELS];
265
266 /* Proc FS stuff. */
267 struct proc_dir_entry *proc_dir;
268 char proc_dir_name[10];
269
270 spinlock_t counter_lock; /* For making counters atomic. */
271
272 /* Commands we got that were invalid. */
273 unsigned int sent_invalid_commands;
274
275 /* Commands we sent to the MC. */
276 unsigned int sent_local_commands;
277 /* Responses from the MC that were delivered to a user. */
278 unsigned int handled_local_responses;
279 /* Responses from the MC that were not delivered to a user. */
280 unsigned int unhandled_local_responses;
281
282 /* Commands we sent out to the IPMB bus. */
283 unsigned int sent_ipmb_commands;
284 /* Commands sent on the IPMB that had errors on the SEND CMD */
285 unsigned int sent_ipmb_command_errs;
286 /* Each retransmit increments this count. */
287 unsigned int retransmitted_ipmb_commands;
288 /* When a message times out (runs out of retransmits) this is
289 incremented. */
290 unsigned int timed_out_ipmb_commands;
291
292 /* This is like above, but for broadcasts. Broadcasts are
293 *not* included in the above count (they are expected to
294 time out). */
295 unsigned int timed_out_ipmb_broadcasts;
296
297 /* Responses I have sent to the IPMB bus. */
298 unsigned int sent_ipmb_responses;
299
300 /* The response was delivered to the user. */
301 unsigned int handled_ipmb_responses;
302 /* The response had invalid data in it. */
303 unsigned int invalid_ipmb_responses;
304 /* The response didn't have anyone waiting for it. */
305 unsigned int unhandled_ipmb_responses;
306
307 /* Commands we sent out to the IPMB bus. */
308 unsigned int sent_lan_commands;
309 /* Commands sent on the IPMB that had errors on the SEND CMD */
310 unsigned int sent_lan_command_errs;
311 /* Each retransmit increments this count. */
312 unsigned int retransmitted_lan_commands;
313 /* When a message times out (runs out of retransmits) this is
314 incremented. */
315 unsigned int timed_out_lan_commands;
316
317 /* Responses I have sent to the IPMB bus. */
318 unsigned int sent_lan_responses;
319
320 /* The response was delivered to the user. */
321 unsigned int handled_lan_responses;
322 /* The response had invalid data in it. */
323 unsigned int invalid_lan_responses;
324 /* The response didn't have anyone waiting for it. */
325 unsigned int unhandled_lan_responses;
326
327 /* The command was delivered to the user. */
328 unsigned int handled_commands;
329 /* The command had invalid data in it. */
330 unsigned int invalid_commands;
331 /* The command didn't have anyone waiting for it. */
332 unsigned int unhandled_commands;
333
334 /* Invalid data in an event. */
335 unsigned int invalid_events;
336 /* Events that were received with the proper format. */
337 unsigned int events;
338};
50c812b2 339#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
1da177e4 340
393d2cc3
CM		 341/* Used to mark an interface entry that cannot be used but is not a
342 * free entry, either, primarily used at creation and deletion time so
343 * a slot doesn't get reused too quickly. */
344#define IPMI_INVALID_INTERFACE_ENTRY ((ipmi_smi_t) ((long) 1))
345#define IPMI_INVALID_INTERFACE(i) (((i) == NULL) \
346 || (i == IPMI_INVALID_INTERFACE_ENTRY))
347
50c812b2
CM		 348/**
349 * The driver model view of the IPMI messaging driver.
350 */
351static struct device_driver ipmidriver = {
352 .name = "ipmi",
353 .bus = &platform_bus_type
354};
355static DEFINE_MUTEX(ipmidriver_mutex);
356
1da177e4
LT		 357#define MAX_IPMI_INTERFACES 4
358static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES];
359
393d2cc3 360/* Directly protects the ipmi_interfaces data structure. */
1da177e4
LT		 361static DEFINE_SPINLOCK(interfaces_lock);
362
363/* List of watchers that want to know when smi's are added and
364 deleted. */
365static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers);
366static DECLARE_RWSEM(smi_watchers_sem);
367
393d2cc3
CM		 368
369static void free_recv_msg_list(struct list_head *q)
370{
371 struct ipmi_recv_msg *msg, *msg2;
372
373 list_for_each_entry_safe(msg, msg2, q, link) {
374 list_del(&msg->link);
375 ipmi_free_recv_msg(msg);
376 }
377}
378
379static void clean_up_interface_data(ipmi_smi_t intf)
380{
381 int i;
382 struct cmd_rcvr *rcvr, *rcvr2;
393d2cc3
CM		 383 struct list_head list;
384
385 free_recv_msg_list(&intf->waiting_msgs);
386 free_recv_msg_list(&intf->waiting_events);
387
388 /* Wholesale remove all the entries from the list in the
389 * interface and wait for RCU to know that none are in use. */
e61fb5b6 390 down(&intf->cmd_rcvrs_lock);
393d2cc3
CM		 391 list_add_rcu(&list, &intf->cmd_rcvrs);
392 list_del_rcu(&intf->cmd_rcvrs);
e61fb5b6 393 up(&intf->cmd_rcvrs_lock);
393d2cc3
CM		 394 synchronize_rcu();
395
396 list_for_each_entry_safe(rcvr, rcvr2, &list, link)
397 kfree(rcvr);
398
399 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
400 if ((intf->seq_table[i].inuse)
401 && (intf->seq_table[i].recv_msg))
402 {
403 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
404 }
405 }
406}
407
408static void intf_free(struct kref *ref)
409{
410 ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
411
412 clean_up_interface_data(intf);
413 kfree(intf);
414}
415
1da177e4
LT		 416int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
417{
393d2cc3
CM		 418 int i;
419 unsigned long flags;
1da177e4 420
1da177e4
LT		 421 down_write(&smi_watchers_sem);
422 list_add(&(watcher->link), &smi_watchers);
393d2cc3
CM		 423 up_write(&smi_watchers_sem);
424 spin_lock_irqsave(&interfaces_lock, flags);
e8b33617 425 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
393d2cc3
CM		 426 ipmi_smi_t intf = ipmi_interfaces[i];
427 if (IPMI_INVALID_INTERFACE(intf))
428 continue;
429 spin_unlock_irqrestore(&interfaces_lock, flags);
50c812b2 430 watcher->new_smi(i, intf->si_dev);
393d2cc3 431 spin_lock_irqsave(&interfaces_lock, flags);
1da177e4 432 }
393d2cc3 433 spin_unlock_irqrestore(&interfaces_lock, flags);
1da177e4
LT		 434 return 0;
435}
436
437int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
438{
439 down_write(&smi_watchers_sem);
440 list_del(&(watcher->link));
441 up_write(&smi_watchers_sem);
442 return 0;
443}
444
445static void
50c812b2 446call_smi_watchers(int i, struct device *dev)
1da177e4
LT		 447{
448 struct ipmi_smi_watcher *w;
449
450 down_read(&smi_watchers_sem);
451 list_for_each_entry(w, &smi_watchers, link) {
452 if (try_module_get(w->owner)) {
50c812b2 453 w->new_smi(i, dev);
1da177e4
LT		 454 module_put(w->owner);
455 }
456 }
457 up_read(&smi_watchers_sem);
458}
459
460static int
461ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
462{
463 if (addr1->addr_type != addr2->addr_type)
464 return 0;
465
466 if (addr1->channel != addr2->channel)
467 return 0;
468
469 if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
470 struct ipmi_system_interface_addr *smi_addr1
471 = (struct ipmi_system_interface_addr *) addr1;
472 struct ipmi_system_interface_addr *smi_addr2
473 = (struct ipmi_system_interface_addr *) addr2;
474 return (smi_addr1->lun == smi_addr2->lun);
475 }
476
477 if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE)
478 || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
479 {
480 struct ipmi_ipmb_addr *ipmb_addr1
481 = (struct ipmi_ipmb_addr *) addr1;
482 struct ipmi_ipmb_addr *ipmb_addr2
483 = (struct ipmi_ipmb_addr *) addr2;
484
485 return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
486 && (ipmb_addr1->lun == ipmb_addr2->lun));
487 }
488
489 if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) {
490 struct ipmi_lan_addr *lan_addr1
491 = (struct ipmi_lan_addr *) addr1;
492 struct ipmi_lan_addr *lan_addr2
493 = (struct ipmi_lan_addr *) addr2;
494
495 return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
496 && (lan_addr1->local_SWID == lan_addr2->local_SWID)
497 && (lan_addr1->session_handle
498 == lan_addr2->session_handle)
499 && (lan_addr1->lun == lan_addr2->lun));
500 }
501
502 return 1;
503}
504
505int ipmi_validate_addr(struct ipmi_addr *addr, int len)
506{
507 if (len < sizeof(struct ipmi_system_interface_addr)) {
508 return -EINVAL;
509 }
510
511 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
512 if (addr->channel != IPMI_BMC_CHANNEL)
513 return -EINVAL;
514 return 0;
515 }
516
517 if ((addr->channel == IPMI_BMC_CHANNEL)
12fc1d7b 518 || (addr->channel >= IPMI_MAX_CHANNELS)
1da177e4
LT		 519 || (addr->channel < 0))
520 return -EINVAL;
521
522 if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
523 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
524 {
525 if (len < sizeof(struct ipmi_ipmb_addr)) {
526 return -EINVAL;
527 }
528 return 0;
529 }
530
531 if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
532 if (len < sizeof(struct ipmi_lan_addr)) {
533 return -EINVAL;
534 }
535 return 0;
536 }
537
538 return -EINVAL;
539}
540
541unsigned int ipmi_addr_length(int addr_type)
542{
543 if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
544 return sizeof(struct ipmi_system_interface_addr);
545
546 if ((addr_type == IPMI_IPMB_ADDR_TYPE)
547 || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
548 {
549 return sizeof(struct ipmi_ipmb_addr);
550 }
551
552 if (addr_type == IPMI_LAN_ADDR_TYPE)
553 return sizeof(struct ipmi_lan_addr);
554
555 return 0;
556}
557
558static void deliver_response(struct ipmi_recv_msg *msg)
559{
56a55ec6
CM		 560 if (! msg->user) {
561 ipmi_smi_t intf = msg->user_msg_data;
562 unsigned long flags;
563
564 /* Special handling for NULL users. */
565 if (intf->null_user_handler) {
566 intf->null_user_handler(intf, msg);
567 spin_lock_irqsave(&intf->counter_lock, flags);
568 intf->handled_local_responses++;
569 spin_unlock_irqrestore(&intf->counter_lock, flags);
570 } else {
571 /* No handler, so give up. */
572 spin_lock_irqsave(&intf->counter_lock, flags);
573 intf->unhandled_local_responses++;
574 spin_unlock_irqrestore(&intf->counter_lock, flags);
575 }
576 ipmi_free_recv_msg(msg);
577 } else {
393d2cc3
CM		 578 ipmi_user_t user = msg->user;
579 user->handler->ipmi_recv_hndl(msg, user->handler_data);
56a55ec6 580 }
1da177e4
LT		 581}
582
583/* Find the next sequence number not being used and add the given
584 message with the given timeout to the sequence table. This must be
585 called with the interface's seq_lock held. */
586static int intf_next_seq(ipmi_smi_t intf,
587 struct ipmi_recv_msg *recv_msg,
588 unsigned long timeout,
589 int retries,
590 int broadcast,
591 unsigned char *seq,
592 long *seqid)
593{
594 int rv = 0;
595 unsigned int i;
596
e8b33617 597 for (i = intf->curr_seq;
1da177e4 598 (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
e8b33617 599 i = (i+1)%IPMI_IPMB_NUM_SEQ)
1da177e4
LT		 600 {
601 if (! intf->seq_table[i].inuse)
602 break;
603 }
604
605 if (! intf->seq_table[i].inuse) {
606 intf->seq_table[i].recv_msg = recv_msg;
607
608 /* Start with the maximum timeout, when the send response
609 comes in we will start the real timer. */
610 intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
611 intf->seq_table[i].orig_timeout = timeout;
612 intf->seq_table[i].retries_left = retries;
613 intf->seq_table[i].broadcast = broadcast;
614 intf->seq_table[i].inuse = 1;
615 intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
616 *seq = i;
617 *seqid = intf->seq_table[i].seqid;
618 intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
619 } else {
620 rv = -EAGAIN;
621 }
622
623 return rv;
624}
625
626/* Return the receive message for the given sequence number and
627 release the sequence number so it can be reused. Some other data
628 is passed in to be sure the message matches up correctly (to help
629 guard against message coming in after their timeout and the
630 sequence number being reused). */
631static int intf_find_seq(ipmi_smi_t intf,
632 unsigned char seq,
633 short channel,
634 unsigned char cmd,
635 unsigned char netfn,
636 struct ipmi_addr *addr,
637 struct ipmi_recv_msg **recv_msg)
638{
639 int rv = -ENODEV;
640 unsigned long flags;
641
642 if (seq >= IPMI_IPMB_NUM_SEQ)
643 return -EINVAL;
644
645 spin_lock_irqsave(&(intf->seq_lock), flags);
646 if (intf->seq_table[seq].inuse) {
647 struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
648
649 if ((msg->addr.channel == channel)
650 && (msg->msg.cmd == cmd)
651 && (msg->msg.netfn == netfn)
652 && (ipmi_addr_equal(addr, &(msg->addr))))
653 {
654 *recv_msg = msg;
655 intf->seq_table[seq].inuse = 0;
656 rv = 0;
657 }
658 }
659 spin_unlock_irqrestore(&(intf->seq_lock), flags);
660
661 return rv;
662}
663
664
665/* Start the timer for a specific sequence table entry. */
666static int intf_start_seq_timer(ipmi_smi_t intf,
667 long msgid)
668{
669 int rv = -ENODEV;
670 unsigned long flags;
671 unsigned char seq;
672 unsigned long seqid;
673
674
675 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
676
677 spin_lock_irqsave(&(intf->seq_lock), flags);
678 /* We do this verification because the user can be deleted
679 while a message is outstanding. */
680 if ((intf->seq_table[seq].inuse)
681 && (intf->seq_table[seq].seqid == seqid))
682 {
683 struct seq_table *ent = &(intf->seq_table[seq]);
684 ent->timeout = ent->orig_timeout;
685 rv = 0;
686 }
687 spin_unlock_irqrestore(&(intf->seq_lock), flags);
688
689 return rv;
690}
691
692/* Got an error for the send message for a specific sequence number. */
693static int intf_err_seq(ipmi_smi_t intf,
694 long msgid,
695 unsigned int err)
696{
697 int rv = -ENODEV;
698 unsigned long flags;
699 unsigned char seq;
700 unsigned long seqid;
701 struct ipmi_recv_msg *msg = NULL;
702
703
704 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
705
706 spin_lock_irqsave(&(intf->seq_lock), flags);
707 /* We do this verification because the user can be deleted
708 while a message is outstanding. */
709 if ((intf->seq_table[seq].inuse)
710 && (intf->seq_table[seq].seqid == seqid))
711 {
712 struct seq_table *ent = &(intf->seq_table[seq]);
713
714 ent->inuse = 0;
715 msg = ent->recv_msg;
716 rv = 0;
717 }
718 spin_unlock_irqrestore(&(intf->seq_lock), flags);
719
720 if (msg) {
721 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
722 msg->msg_data[0] = err;
723 msg->msg.netfn |= 1; /* Convert to a response. */
724 msg->msg.data_len = 1;
725 msg->msg.data = msg->msg_data;
726 deliver_response(msg);
727 }
728
729 return rv;
730}
731
732
733int ipmi_create_user(unsigned int if_num,
734 struct ipmi_user_hndl *handler,
735 void *handler_data,
736 ipmi_user_t *user)
737{
738 unsigned long flags;
739 ipmi_user_t new_user;
740 int rv = 0;
741 ipmi_smi_t intf;
742
743 /* There is no module usecount here, because it's not
744 required. Since this can only be used by and called from
745 other modules, they will implicitly use this module, and
746 thus this can't be removed unless the other modules are
747 removed. */
748
749 if (handler == NULL)
750 return -EINVAL;
751
752 /* Make sure the driver is actually initialized, this handles
753 problems with initialization order. */
754 if (!initialized) {
755 rv = ipmi_init_msghandler();
756 if (rv)
757 return rv;
758
759 /* The init code doesn't return an error if it was turned
760 off, but it won't initialize. Check that. */
761 if (!initialized)
762 return -ENODEV;
763 }
764
765 new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
766 if (! new_user)
767 return -ENOMEM;
768
393d2cc3
CM		 769 spin_lock_irqsave(&interfaces_lock, flags);
770 intf = ipmi_interfaces[if_num];
771 if ((if_num >= MAX_IPMI_INTERFACES) || IPMI_INVALID_INTERFACE(intf)) {
772 spin_unlock_irqrestore(&interfaces_lock, flags);
5c98d29a
AB		 773 rv = -EINVAL;
774 goto out_kfree;
1da177e4
LT		 775 }
776
393d2cc3
CM		 777 /* Note that each existing user holds a refcount to the interface. */
778 kref_get(&intf->refcount);
779 spin_unlock_irqrestore(&interfaces_lock, flags);
1da177e4 780
393d2cc3 781 kref_init(&new_user->refcount);
1da177e4
LT		 782 new_user->handler = handler;
783 new_user->handler_data = handler_data;
784 new_user->intf = intf;
785 new_user->gets_events = 0;
786
787 if (!try_module_get(intf->handlers->owner)) {
788 rv = -ENODEV;
5c98d29a 789 goto out_kref;
1da177e4
LT		 790 }
791
792 if (intf->handlers->inc_usecount) {
793 rv = intf->handlers->inc_usecount(intf->send_info);
794 if (rv) {
795 module_put(intf->handlers->owner);
5c98d29a 796 goto out_kref;
1da177e4
LT		 797 }
798 }
799
393d2cc3
CM		 800 new_user->valid = 1;
801 spin_lock_irqsave(&intf->seq_lock, flags);
802 list_add_rcu(&new_user->link, &intf->users);
803 spin_unlock_irqrestore(&intf->seq_lock, flags);
804 *user = new_user;
805 return 0;
1da177e4 806
5c98d29a 807out_kref:
393d2cc3 808 kref_put(&intf->refcount, intf_free);
5c98d29a
AB		 809out_kfree:
810 kfree(new_user);
1da177e4
LT		 811 return rv;
812}
813
393d2cc3
CM		 814static void free_user(struct kref *ref)
815{
816 ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
817 kfree(user);
818}
819
820int ipmi_destroy_user(ipmi_user_t user)
1da177e4
LT		 821{
822 int rv = -ENODEV;
393d2cc3 823 ipmi_smi_t intf = user->intf;
1da177e4
LT		 824 int i;
825 unsigned long flags;
393d2cc3 826 struct cmd_rcvr *rcvr;
393d2cc3 827 struct cmd_rcvr *rcvrs = NULL;
1da177e4 828
393d2cc3 829 user->valid = 1;
1da177e4 830
393d2cc3
CM		 831 /* Remove the user from the interface's sequence table. */
832 spin_lock_irqsave(&intf->seq_lock, flags);
833 list_del_rcu(&user->link);
1da177e4 834
e8b33617 835 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
393d2cc3
CM		 836 if (intf->seq_table[i].inuse
837 && (intf->seq_table[i].recv_msg->user == user))
1da177e4 838 {
393d2cc3 839 intf->seq_table[i].inuse = 0;
1da177e4
LT		 840 }
841 }
393d2cc3
CM		 842 spin_unlock_irqrestore(&intf->seq_lock, flags);
843
844 /*
845 * Remove the user from the command receiver's table. First
846 * we build a list of everything (not using the standard link,
847 * since other things may be using it till we do
848 * synchronize_rcu()) then free everything in that list.
849 */
e61fb5b6 850 down(&intf->cmd_rcvrs_lock);
066bb8d0 851 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1da177e4 852 if (rcvr->user == user) {
393d2cc3
CM		 853 list_del_rcu(&rcvr->link);
854 rcvr->next = rcvrs;
855 rcvrs = rcvr;
1da177e4
LT		 856 }
857 }
e61fb5b6 858 up(&intf->cmd_rcvrs_lock);
393d2cc3
CM		 859 synchronize_rcu();
860 while (rcvrs) {
861 rcvr = rcvrs;
862 rcvrs = rcvr->next;
863 kfree(rcvr);
864 }
1da177e4 865
393d2cc3
CM		 866 module_put(intf->handlers->owner);
867 if (intf->handlers->dec_usecount)
868 intf->handlers->dec_usecount(intf->send_info);
1da177e4 869
393d2cc3 870 kref_put(&intf->refcount, intf_free);
1da177e4 871
393d2cc3 872 kref_put(&user->refcount, free_user);
1da177e4 873
1da177e4
LT		 874 return rv;
875}
876
877void ipmi_get_version(ipmi_user_t user,
878 unsigned char *major,
879 unsigned char *minor)
880{
50c812b2
CM		 881 *major = ipmi_version_major(&user->intf->bmc->id);
882 *minor = ipmi_version_minor(&user->intf->bmc->id);
1da177e4
LT		 883}
884
c14979b9
CM		 885int ipmi_set_my_address(ipmi_user_t user,
886 unsigned int channel,
887 unsigned char address)
1da177e4 888{
c14979b9
CM		 889 if (channel >= IPMI_MAX_CHANNELS)
890 return -EINVAL;
891 user->intf->channels[channel].address = address;
892 return 0;
1da177e4
LT		 893}
894
c14979b9
CM		 895int ipmi_get_my_address(ipmi_user_t user,
896 unsigned int channel,
897 unsigned char *address)
1da177e4 898{
c14979b9
CM		 899 if (channel >= IPMI_MAX_CHANNELS)
900 return -EINVAL;
901 *address = user->intf->channels[channel].address;
902 return 0;
1da177e4
LT		 903}
904
c14979b9
CM		 905int ipmi_set_my_LUN(ipmi_user_t user,
906 unsigned int channel,
907 unsigned char LUN)
1da177e4 908{
c14979b9
CM		 909 if (channel >= IPMI_MAX_CHANNELS)
910 return -EINVAL;
911 user->intf->channels[channel].lun = LUN & 0x3;
912 return 0;
1da177e4
LT		 913}
914
c14979b9
CM		 915int ipmi_get_my_LUN(ipmi_user_t user,
916 unsigned int channel,
917 unsigned char *address)
1da177e4 918{
c14979b9
CM		 919 if (channel >= IPMI_MAX_CHANNELS)
920 return -EINVAL;
921 *address = user->intf->channels[channel].lun;
922 return 0;
1da177e4
LT		 923}
924
925int ipmi_set_gets_events(ipmi_user_t user, int val)
926{
393d2cc3
CM		 927 unsigned long flags;
928 ipmi_smi_t intf = user->intf;
929 struct ipmi_recv_msg *msg, *msg2;
930 struct list_head msgs;
1da177e4 931
393d2cc3
CM		 932 INIT_LIST_HEAD(&msgs);
933
934 spin_lock_irqsave(&intf->events_lock, flags);
1da177e4
LT		 935 user->gets_events = val;
936
937 if (val) {
938 /* Deliver any queued events. */
393d2cc3 939 list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) {
1da177e4 940 list_del(&msg->link);
393d2cc3 941 list_add_tail(&msg->link, &msgs);
1da177e4
LT		 942 }
943 }
393d2cc3
CM		 944
945 /* Hold the events lock while doing this to preserve order. */
946 list_for_each_entry_safe(msg, msg2, &msgs, link) {
947 msg->user = user;
948 kref_get(&user->refcount);
949 deliver_response(msg);
950 }
951
952 spin_unlock_irqrestore(&intf->events_lock, flags);
1da177e4
LT		 953
954 return 0;
955}
956
393d2cc3
CM		 957static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
958 unsigned char netfn,
959 unsigned char cmd)
960{
961 struct cmd_rcvr *rcvr;
962
963 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
964 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd))
965 return rcvr;
966 }
967 return NULL;
968}
969
1da177e4
LT		 970int ipmi_register_for_cmd(ipmi_user_t user,
971 unsigned char netfn,
972 unsigned char cmd)
973{
393d2cc3
CM		 974 ipmi_smi_t intf = user->intf;
975 struct cmd_rcvr *rcvr;
976 struct cmd_rcvr *entry;
977 int rv = 0;
1da177e4
LT		 978
979
980 rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
981 if (! rcvr)
982 return -ENOMEM;
393d2cc3
CM		 983 rcvr->cmd = cmd;
984 rcvr->netfn = netfn;
985 rcvr->user = user;
1da177e4 986
e61fb5b6 987 down(&intf->cmd_rcvrs_lock);
1da177e4 988 /* Make sure the command/netfn is not already registered. */
393d2cc3
CM		 989 entry = find_cmd_rcvr(intf, netfn, cmd);
990 if (entry) {
991 rv = -EBUSY;
992 goto out_unlock;
1da177e4 993 }
877197ef 994
393d2cc3 995 list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1da177e4 996
393d2cc3 997 out_unlock:
e61fb5b6 998 up(&intf->cmd_rcvrs_lock);
1da177e4
LT		 999 if (rv)
1000 kfree(rcvr);
1001
1002 return rv;
1003}
1004
1005int ipmi_unregister_for_cmd(ipmi_user_t user,
1006 unsigned char netfn,
1007 unsigned char cmd)
1008{
393d2cc3
CM		 1009 ipmi_smi_t intf = user->intf;
1010 struct cmd_rcvr *rcvr;
1da177e4 1011
e61fb5b6 1012 down(&intf->cmd_rcvrs_lock);
1da177e4 1013 /* Make sure the command/netfn is not already registered. */
393d2cc3
CM		 1014 rcvr = find_cmd_rcvr(intf, netfn, cmd);
1015 if ((rcvr) && (rcvr->user == user)) {
1016 list_del_rcu(&rcvr->link);
e61fb5b6 1017 up(&intf->cmd_rcvrs_lock);
393d2cc3
CM		 1018 synchronize_rcu();
1019 kfree(rcvr);
1020 return 0;
1021 } else {
e61fb5b6 1022 up(&intf->cmd_rcvrs_lock);
393d2cc3 1023 return -ENOENT;
1da177e4 1024 }
1da177e4
LT		 1025}
1026
1027void ipmi_user_set_run_to_completion(ipmi_user_t user, int val)
1028{
393d2cc3
CM		 1029 ipmi_smi_t intf = user->intf;
1030 intf->handlers->set_run_to_completion(intf->send_info, val);
1da177e4
LT		 1031}
1032
1033static unsigned char
1034ipmb_checksum(unsigned char *data, int size)
1035{
1036 unsigned char csum = 0;
1037
1038 for (; size > 0; size--, data++)
1039 csum += *data;
1040
1041 return -csum;
1042}
1043
1044static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1045 struct kernel_ipmi_msg *msg,
1046 struct ipmi_ipmb_addr *ipmb_addr,
1047 long msgid,
1048 unsigned char ipmb_seq,
1049 int broadcast,
1050 unsigned char source_address,
1051 unsigned char source_lun)
1052{
1053 int i = broadcast;
1054
1055 /* Format the IPMB header data. */
1056 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1057 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1058 smi_msg->data[2] = ipmb_addr->channel;
1059 if (broadcast)
1060 smi_msg->data[3] = 0;
1061 smi_msg->data[i+3] = ipmb_addr->slave_addr;
1062 smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1063 smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1064 smi_msg->data[i+6] = source_address;
1065 smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1066 smi_msg->data[i+8] = msg->cmd;
1067
1068 /* Now tack on the data to the message. */
1069 if (msg->data_len > 0)
1070 memcpy(&(smi_msg->data[i+9]), msg->data,
1071 msg->data_len);
1072 smi_msg->data_size = msg->data_len + 9;
1073
1074 /* Now calculate the checksum and tack it on. */
1075 smi_msg->data[i+smi_msg->data_size]
1076 = ipmb_checksum(&(smi_msg->data[i+6]),
1077 smi_msg->data_size-6);
1078
1079 /* Add on the checksum size and the offset from the
1080 broadcast. */
1081 smi_msg->data_size += 1 + i;
1082
1083 smi_msg->msgid = msgid;
1084}
1085
1086static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1087 struct kernel_ipmi_msg *msg,
1088 struct ipmi_lan_addr *lan_addr,
1089 long msgid,
1090 unsigned char ipmb_seq,
1091 unsigned char source_lun)
1092{
1093 /* Format the IPMB header data. */
1094 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1095 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1096 smi_msg->data[2] = lan_addr->channel;
1097 smi_msg->data[3] = lan_addr->session_handle;
1098 smi_msg->data[4] = lan_addr->remote_SWID;
1099 smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1100 smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1101 smi_msg->data[7] = lan_addr->local_SWID;
1102 smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1103 smi_msg->data[9] = msg->cmd;
1104
1105 /* Now tack on the data to the message. */
1106 if (msg->data_len > 0)
1107 memcpy(&(smi_msg->data[10]), msg->data,
1108 msg->data_len);
1109 smi_msg->data_size = msg->data_len + 10;
1110
1111 /* Now calculate the checksum and tack it on. */
1112 smi_msg->data[smi_msg->data_size]
1113 = ipmb_checksum(&(smi_msg->data[7]),
1114 smi_msg->data_size-7);
1115
1116 /* Add on the checksum size and the offset from the
1117 broadcast. */
1118 smi_msg->data_size += 1;
1119
1120 smi_msg->msgid = msgid;
1121}
1122
1123/* Separate from ipmi_request so that the user does not have to be
1124 supplied in certain circumstances (mainly at panic time). If
1125 messages are supplied, they will be freed, even if an error
1126 occurs. */
393d2cc3
CM		 1127static int i_ipmi_request(ipmi_user_t user,
1128 ipmi_smi_t intf,
1129 struct ipmi_addr *addr,
1130 long msgid,
1131 struct kernel_ipmi_msg *msg,
1132 void *user_msg_data,
1133 void *supplied_smi,
1134 struct ipmi_recv_msg *supplied_recv,
1135 int priority,
1136 unsigned char source_address,
1137 unsigned char source_lun,
1138 int retries,
1139 unsigned int retry_time_ms)
1da177e4
LT		 1140{
1141 int rv = 0;
1142 struct ipmi_smi_msg *smi_msg;
1143 struct ipmi_recv_msg *recv_msg;
1144 unsigned long flags;
1145
1146
1147 if (supplied_recv) {
1148 recv_msg = supplied_recv;
1149 } else {
1150 recv_msg = ipmi_alloc_recv_msg();
1151 if (recv_msg == NULL) {
1152 return -ENOMEM;
1153 }
1154 }
1155 recv_msg->user_msg_data = user_msg_data;
1156
1157 if (supplied_smi) {
1158 smi_msg = (struct ipmi_smi_msg *) supplied_smi;
1159 } else {
1160 smi_msg = ipmi_alloc_smi_msg();
1161 if (smi_msg == NULL) {
1162 ipmi_free_recv_msg(recv_msg);
1163 return -ENOMEM;
1164 }
1165 }
1166
1167 recv_msg->user = user;
393d2cc3
CM		 1168 if (user)
1169 kref_get(&user->refcount);
1da177e4
LT		 1170 recv_msg->msgid = msgid;
1171 /* Store the message to send in the receive message so timeout
1172 responses can get the proper response data. */
1173 recv_msg->msg = *msg;
1174
1175 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1176 struct ipmi_system_interface_addr *smi_addr;
1177
1178 if (msg->netfn & 1) {
1179 /* Responses are not allowed to the SMI. */
1180 rv = -EINVAL;
1181 goto out_err;
1182 }
1183
1184 smi_addr = (struct ipmi_system_interface_addr *) addr;
1185 if (smi_addr->lun > 3) {
1186 spin_lock_irqsave(&intf->counter_lock, flags);
1187 intf->sent_invalid_commands++;
1188 spin_unlock_irqrestore(&intf->counter_lock, flags);
1189 rv = -EINVAL;
1190 goto out_err;
1191 }
1192
1193 memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1194
1195 if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1196 && ((msg->cmd == IPMI_SEND_MSG_CMD)
1197 || (msg->cmd == IPMI_GET_MSG_CMD)
1198 || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD)))
1199 {
1200 /* We don't let the user do these, since we manage
1201 the sequence numbers. */
1202 spin_lock_irqsave(&intf->counter_lock, flags);
1203 intf->sent_invalid_commands++;
1204 spin_unlock_irqrestore(&intf->counter_lock, flags);
1205 rv = -EINVAL;
1206 goto out_err;
1207 }
1208
1209 if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
1210 spin_lock_irqsave(&intf->counter_lock, flags);
1211 intf->sent_invalid_commands++;
1212 spin_unlock_irqrestore(&intf->counter_lock, flags);
1213 rv = -EMSGSIZE;
1214 goto out_err;
1215 }
1216
1217 smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1218 smi_msg->data[1] = msg->cmd;
1219 smi_msg->msgid = msgid;
1220 smi_msg->user_data = recv_msg;
1221 if (msg->data_len > 0)
1222 memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1223 smi_msg->data_size = msg->data_len + 2;
1224 spin_lock_irqsave(&intf->counter_lock, flags);
1225 intf->sent_local_commands++;
1226 spin_unlock_irqrestore(&intf->counter_lock, flags);
1227 } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
1228 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
1229 {
1230 struct ipmi_ipmb_addr *ipmb_addr;
1231 unsigned char ipmb_seq;
1232 long seqid;
1233 int broadcast = 0;
1234
9c101fd4
KZ		 1235 if (addr->channel >= IPMI_MAX_CHANNELS) {
1236 spin_lock_irqsave(&intf->counter_lock, flags);
1da177e4
LT		 1237 intf->sent_invalid_commands++;
1238 spin_unlock_irqrestore(&intf->counter_lock, flags);
1239 rv = -EINVAL;
1240 goto out_err;
1241 }
1242
1243 if (intf->channels[addr->channel].medium
1244 != IPMI_CHANNEL_MEDIUM_IPMB)
1245 {
1246 spin_lock_irqsave(&intf->counter_lock, flags);
1247 intf->sent_invalid_commands++;
1248 spin_unlock_irqrestore(&intf->counter_lock, flags);
1249 rv = -EINVAL;
1250 goto out_err;
1251 }
1252
1253 if (retries < 0) {
1254 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1255 retries = 0; /* Don't retry broadcasts. */
1256 else
1257 retries = 4;
1258 }
1259 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
1260 /* Broadcasts add a zero at the beginning of the
1261 message, but otherwise is the same as an IPMB
1262 address. */
1263 addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1264 broadcast = 1;
1265 }
1266
1267
1268 /* Default to 1 second retries. */
1269 if (retry_time_ms == 0)
1270 retry_time_ms = 1000;
1271
1272 /* 9 for the header and 1 for the checksum, plus
1273 possibly one for the broadcast. */
1274 if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
1275 spin_lock_irqsave(&intf->counter_lock, flags);
1276 intf->sent_invalid_commands++;
1277 spin_unlock_irqrestore(&intf->counter_lock, flags);
1278 rv = -EMSGSIZE;
1279 goto out_err;
1280 }
1281
1282 ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1283 if (ipmb_addr->lun > 3) {
1284 spin_lock_irqsave(&intf->counter_lock, flags);
1285 intf->sent_invalid_commands++;
1286 spin_unlock_irqrestore(&intf->counter_lock, flags);
1287 rv = -EINVAL;
1288 goto out_err;
1289 }
1290
1291 memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1292
1293 if (recv_msg->msg.netfn & 0x1) {
1294 /* It's a response, so use the user's sequence
1295 from msgid. */
1296 spin_lock_irqsave(&intf->counter_lock, flags);
1297 intf->sent_ipmb_responses++;
1298 spin_unlock_irqrestore(&intf->counter_lock, flags);
1299 format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1300 msgid, broadcast,
1301 source_address, source_lun);
1302
1303 /* Save the receive message so we can use it
1304 to deliver the response. */
1305 smi_msg->user_data = recv_msg;
1306 } else {
1307 /* It's a command, so get a sequence for it. */
1308
1309 spin_lock_irqsave(&(intf->seq_lock), flags);
1310
1311 spin_lock(&intf->counter_lock);
1312 intf->sent_ipmb_commands++;
1313 spin_unlock(&intf->counter_lock);
1314
1315 /* Create a sequence number with a 1 second
1316 timeout and 4 retries. */
1317 rv = intf_next_seq(intf,
1318 recv_msg,
1319 retry_time_ms,
1320 retries,
1321 broadcast,
1322 &ipmb_seq,
1323 &seqid);
1324 if (rv) {
1325 /* We have used up all the sequence numbers,
1326 probably, so abort. */
1327 spin_unlock_irqrestore(&(intf->seq_lock),
1328 flags);
1329 goto out_err;
1330 }
1331
1332 /* Store the sequence number in the message,
1333 so that when the send message response
1334 comes back we can start the timer. */
1335 format_ipmb_msg(smi_msg, msg, ipmb_addr,
1336 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1337 ipmb_seq, broadcast,
1338 source_address, source_lun);
1339
1340 /* Copy the message into the recv message data, so we
1341 can retransmit it later if necessary. */
1342 memcpy(recv_msg->msg_data, smi_msg->data,
1343 smi_msg->data_size);
1344 recv_msg->msg.data = recv_msg->msg_data;
1345 recv_msg->msg.data_len = smi_msg->data_size;
1346
1347 /* We don't unlock until here, because we need
1348 to copy the completed message into the
1349 recv_msg before we release the lock.
1350 Otherwise, race conditions may bite us. I
1351 know that's pretty paranoid, but I prefer
1352 to be correct. */
1353 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1354 }
1355 } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
1356 struct ipmi_lan_addr *lan_addr;
1357 unsigned char ipmb_seq;
1358 long seqid;
1359
12fc1d7b 1360 if (addr->channel >= IPMI_MAX_CHANNELS) {
1da177e4
LT		 1361 spin_lock_irqsave(&intf->counter_lock, flags);
1362 intf->sent_invalid_commands++;
1363 spin_unlock_irqrestore(&intf->counter_lock, flags);
1364 rv = -EINVAL;
1365 goto out_err;
1366 }
1367
1368 if ((intf->channels[addr->channel].medium
1369 != IPMI_CHANNEL_MEDIUM_8023LAN)
1370 && (intf->channels[addr->channel].medium
1371 != IPMI_CHANNEL_MEDIUM_ASYNC))
1372 {
1373 spin_lock_irqsave(&intf->counter_lock, flags);
1374 intf->sent_invalid_commands++;
1375 spin_unlock_irqrestore(&intf->counter_lock, flags);
1376 rv = -EINVAL;
1377 goto out_err;
1378 }
1379
1380 retries = 4;
1381
1382 /* Default to 1 second retries. */
1383 if (retry_time_ms == 0)
1384 retry_time_ms = 1000;
1385
1386 /* 11 for the header and 1 for the checksum. */
1387 if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
1388 spin_lock_irqsave(&intf->counter_lock, flags);
1389 intf->sent_invalid_commands++;
1390 spin_unlock_irqrestore(&intf->counter_lock, flags);
1391 rv = -EMSGSIZE;
1392 goto out_err;
1393 }
1394
1395 lan_addr = (struct ipmi_lan_addr *) addr;
1396 if (lan_addr->lun > 3) {
1397 spin_lock_irqsave(&intf->counter_lock, flags);
1398 intf->sent_invalid_commands++;
1399 spin_unlock_irqrestore(&intf->counter_lock, flags);
1400 rv = -EINVAL;
1401 goto out_err;
1402 }
1403
1404 memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1405
1406 if (recv_msg->msg.netfn & 0x1) {
1407 /* It's a response, so use the user's sequence
1408 from msgid. */
1409 spin_lock_irqsave(&intf->counter_lock, flags);
1410 intf->sent_lan_responses++;
1411 spin_unlock_irqrestore(&intf->counter_lock, flags);
1412 format_lan_msg(smi_msg, msg, lan_addr, msgid,
1413 msgid, source_lun);
1414
1415 /* Save the receive message so we can use it
1416 to deliver the response. */
1417 smi_msg->user_data = recv_msg;
1418 } else {
1419 /* It's a command, so get a sequence for it. */
1420
1421 spin_lock_irqsave(&(intf->seq_lock), flags);
1422
1423 spin_lock(&intf->counter_lock);
1424 intf->sent_lan_commands++;
1425 spin_unlock(&intf->counter_lock);
1426
1427 /* Create a sequence number with a 1 second
1428 timeout and 4 retries. */
1429 rv = intf_next_seq(intf,
1430 recv_msg,
1431 retry_time_ms,
1432 retries,
1433 0,
1434 &ipmb_seq,
1435 &seqid);
1436 if (rv) {
1437 /* We have used up all the sequence numbers,
1438 probably, so abort. */
1439 spin_unlock_irqrestore(&(intf->seq_lock),
1440 flags);
1441 goto out_err;
1442 }
1443
1444 /* Store the sequence number in the message,
1445 so that when the send message response
1446 comes back we can start the timer. */
1447 format_lan_msg(smi_msg, msg, lan_addr,
1448 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1449 ipmb_seq, source_lun);
1450
1451 /* Copy the message into the recv message data, so we
1452 can retransmit it later if necessary. */
1453 memcpy(recv_msg->msg_data, smi_msg->data,
1454 smi_msg->data_size);
1455 recv_msg->msg.data = recv_msg->msg_data;
1456 recv_msg->msg.data_len = smi_msg->data_size;
1457
1458 /* We don't unlock until here, because we need
1459 to copy the completed message into the
1460 recv_msg before we release the lock.
1461 Otherwise, race conditions may bite us. I
1462 know that's pretty paranoid, but I prefer
1463 to be correct. */
1464 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1465 }
1466 } else {
1467 /* Unknown address type. */
1468 spin_lock_irqsave(&intf->counter_lock, flags);
1469 intf->sent_invalid_commands++;
1470 spin_unlock_irqrestore(&intf->counter_lock, flags);
1471 rv = -EINVAL;
1472 goto out_err;
1473 }
1474
1475#ifdef DEBUG_MSGING
1476 {
1477 int m;
e8b33617 1478 for (m = 0; m < smi_msg->data_size; m++)
1da177e4
LT		 1479 printk(" %2.2x", smi_msg->data[m]);
1480 printk("\n");
1481 }
1482#endif
1483 intf->handlers->sender(intf->send_info, smi_msg, priority);
1484
1485 return 0;
1486
1487 out_err:
1488 ipmi_free_smi_msg(smi_msg);
1489 ipmi_free_recv_msg(recv_msg);
1490 return rv;
1491}
1492
c14979b9
CM		 1493static int check_addr(ipmi_smi_t intf,
1494 struct ipmi_addr *addr,
1495 unsigned char *saddr,
1496 unsigned char *lun)
1497{
1498 if (addr->channel >= IPMI_MAX_CHANNELS)
1499 return -EINVAL;
1500 *lun = intf->channels[addr->channel].lun;
1501 *saddr = intf->channels[addr->channel].address;
1502 return 0;
1503}
1504
1da177e4
LT		 1505int ipmi_request_settime(ipmi_user_t user,
1506 struct ipmi_addr *addr,
1507 long msgid,
1508 struct kernel_ipmi_msg *msg,
1509 void *user_msg_data,
1510 int priority,
1511 int retries,
1512 unsigned int retry_time_ms)
1513{
c14979b9
CM		 1514 unsigned char saddr, lun;
1515 int rv;
1516
56a55ec6
CM		 1517 if (! user)
1518 return -EINVAL;
c14979b9
CM		 1519 rv = check_addr(user->intf, addr, &saddr, &lun);
1520 if (rv)
1521 return rv;
1da177e4
LT		 1522 return i_ipmi_request(user,
1523 user->intf,
1524 addr,
1525 msgid,
1526 msg,
1527 user_msg_data,
1528 NULL, NULL,
1529 priority,
c14979b9
CM		 1530 saddr,
1531 lun,
1da177e4
LT		 1532 retries,
1533 retry_time_ms);
1534}
1535
1536int ipmi_request_supply_msgs(ipmi_user_t user,
1537 struct ipmi_addr *addr,
1538 long msgid,
1539 struct kernel_ipmi_msg *msg,
1540 void *user_msg_data,
1541 void *supplied_smi,
1542 struct ipmi_recv_msg *supplied_recv,
1543 int priority)
1544{
c14979b9
CM		 1545 unsigned char saddr, lun;
1546 int rv;
1547
56a55ec6
CM		 1548 if (! user)
1549 return -EINVAL;
c14979b9
CM		 1550 rv = check_addr(user->intf, addr, &saddr, &lun);
1551 if (rv)
1552 return rv;
1da177e4
LT		 1553 return i_ipmi_request(user,
1554 user->intf,
1555 addr,
1556 msgid,
1557 msg,
1558 user_msg_data,
1559 supplied_smi,
1560 supplied_recv,
1561 priority,
c14979b9
CM		 1562 saddr,
1563 lun,
1da177e4
LT		 1564 -1, 0);
1565}
1566
1567static int ipmb_file_read_proc(char *page, char **start, off_t off,
1568 int count, int *eof, void *data)
1569{
1570 char *out = (char *) page;
1571 ipmi_smi_t intf = data;
c14979b9
CM		 1572 int i;
1573 int rv= 0;
1da177e4 1574
e8b33617 1575 for (i = 0; i < IPMI_MAX_CHANNELS; i++)
c14979b9
CM		 1576 rv += sprintf(out+rv, "%x ", intf->channels[i].address);
1577 out[rv-1] = '\n'; /* Replace the final space with a newline */
1578 out[rv] = '\0';
1579 rv++;
1580 return rv;
1da177e4
LT		 1581}
1582
1583static int version_file_read_proc(char *page, char **start, off_t off,
1584 int count, int *eof, void *data)
1585{
1586 char *out = (char *) page;
1587 ipmi_smi_t intf = data;
1588
1589 return sprintf(out, "%d.%d\n",
50c812b2
CM		 1590 ipmi_version_major(&intf->bmc->id),
1591 ipmi_version_minor(&intf->bmc->id));
1da177e4
LT		 1592}
1593
1594static int stat_file_read_proc(char *page, char **start, off_t off,
1595 int count, int *eof, void *data)
1596{
1597 char *out = (char *) page;
1598 ipmi_smi_t intf = data;
1599
1600 out += sprintf(out, "sent_invalid_commands: %d\n",
1601 intf->sent_invalid_commands);
1602 out += sprintf(out, "sent_local_commands: %d\n",
1603 intf->sent_local_commands);
1604 out += sprintf(out, "handled_local_responses: %d\n",
1605 intf->handled_local_responses);
1606 out += sprintf(out, "unhandled_local_responses: %d\n",
1607 intf->unhandled_local_responses);
1608 out += sprintf(out, "sent_ipmb_commands: %d\n",
1609 intf->sent_ipmb_commands);
1610 out += sprintf(out, "sent_ipmb_command_errs: %d\n",
1611 intf->sent_ipmb_command_errs);
1612 out += sprintf(out, "retransmitted_ipmb_commands: %d\n",
1613 intf->retransmitted_ipmb_commands);
1614 out += sprintf(out, "timed_out_ipmb_commands: %d\n",
1615 intf->timed_out_ipmb_commands);
1616 out += sprintf(out, "timed_out_ipmb_broadcasts: %d\n",
1617 intf->timed_out_ipmb_broadcasts);
1618 out += sprintf(out, "sent_ipmb_responses: %d\n",
1619 intf->sent_ipmb_responses);
1620 out += sprintf(out, "handled_ipmb_responses: %d\n",
1621 intf->handled_ipmb_responses);
1622 out += sprintf(out, "invalid_ipmb_responses: %d\n",
1623 intf->invalid_ipmb_responses);
1624 out += sprintf(out, "unhandled_ipmb_responses: %d\n",
1625 intf->unhandled_ipmb_responses);
1626 out += sprintf(out, "sent_lan_commands: %d\n",
1627 intf->sent_lan_commands);
1628 out += sprintf(out, "sent_lan_command_errs: %d\n",
1629 intf->sent_lan_command_errs);
1630 out += sprintf(out, "retransmitted_lan_commands: %d\n",
1631 intf->retransmitted_lan_commands);
1632 out += sprintf(out, "timed_out_lan_commands: %d\n",
1633 intf->timed_out_lan_commands);
1634 out += sprintf(out, "sent_lan_responses: %d\n",
1635 intf->sent_lan_responses);
1636 out += sprintf(out, "handled_lan_responses: %d\n",
1637 intf->handled_lan_responses);
1638 out += sprintf(out, "invalid_lan_responses: %d\n",
1639 intf->invalid_lan_responses);
1640 out += sprintf(out, "unhandled_lan_responses: %d\n",
1641 intf->unhandled_lan_responses);
1642 out += sprintf(out, "handled_commands: %d\n",
1643 intf->handled_commands);
1644 out += sprintf(out, "invalid_commands: %d\n",
1645 intf->invalid_commands);
1646 out += sprintf(out, "unhandled_commands: %d\n",
1647 intf->unhandled_commands);
1648 out += sprintf(out, "invalid_events: %d\n",
1649 intf->invalid_events);
1650 out += sprintf(out, "events: %d\n",
1651 intf->events);
1652
1653 return (out - ((char *) page));
1654}
1655
1656int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
1657 read_proc_t *read_proc, write_proc_t *write_proc,
1658 void *data, struct module *owner)
1659{
1da177e4 1660 int rv = 0;
3b625943
CM		 1661#ifdef CONFIG_PROC_FS
1662 struct proc_dir_entry *file;
1da177e4
LT		 1663 struct ipmi_proc_entry *entry;
1664
1665 /* Create a list element. */
1666 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1667 if (!entry)
1668 return -ENOMEM;
1669 entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
1670 if (!entry->name) {
1671 kfree(entry);
1672 return -ENOMEM;
1673 }
1674 strcpy(entry->name, name);
1675
1676 file = create_proc_entry(name, 0, smi->proc_dir);
1677 if (!file) {
1678 kfree(entry->name);
1679 kfree(entry);
1680 rv = -ENOMEM;
1681 } else {
1682 file->nlink = 1;
1683 file->data = data;
1684 file->read_proc = read_proc;
1685 file->write_proc = write_proc;
1686 file->owner = owner;
1687
3b625943 1688 spin_lock(&smi->proc_entry_lock);
1da177e4
LT		 1689 /* Stick it on the list. */
1690 entry->next = smi->proc_entries;
1691 smi->proc_entries = entry;
3b625943 1692 spin_unlock(&smi->proc_entry_lock);
1da177e4 1693 }
3b625943 1694#endif /* CONFIG_PROC_FS */
1da177e4
LT		 1695
1696 return rv;
1697}
1698
1699static int add_proc_entries(ipmi_smi_t smi, int num)
1700{
1701 int rv = 0;
1702
3b625943 1703#ifdef CONFIG_PROC_FS
1da177e4
LT		 1704 sprintf(smi->proc_dir_name, "%d", num);
1705 smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
1706 if (!smi->proc_dir)
1707 rv = -ENOMEM;
1708 else {
1709 smi->proc_dir->owner = THIS_MODULE;
1710 }
1711
1712 if (rv == 0)
1713 rv = ipmi_smi_add_proc_entry(smi, "stats",
1714 stat_file_read_proc, NULL,
1715 smi, THIS_MODULE);
1716
1717 if (rv == 0)
1718 rv = ipmi_smi_add_proc_entry(smi, "ipmb",
1719 ipmb_file_read_proc, NULL,
1720 smi, THIS_MODULE);
1721
1722 if (rv == 0)
1723 rv = ipmi_smi_add_proc_entry(smi, "version",
1724 version_file_read_proc, NULL,
1725 smi, THIS_MODULE);
3b625943 1726#endif /* CONFIG_PROC_FS */
1da177e4
LT		 1727
1728 return rv;
1729}
1730
1731static void remove_proc_entries(ipmi_smi_t smi)
1732{
3b625943 1733#ifdef CONFIG_PROC_FS
1da177e4
LT		 1734 struct ipmi_proc_entry *entry;
1735
3b625943 1736 spin_lock(&smi->proc_entry_lock);
1da177e4
LT		 1737 while (smi->proc_entries) {
1738 entry = smi->proc_entries;
1739 smi->proc_entries = entry->next;
1740
1741 remove_proc_entry(entry->name, smi->proc_dir);
1742 kfree(entry->name);
1743 kfree(entry);
1744 }
3b625943 1745 spin_unlock(&smi->proc_entry_lock);
1da177e4 1746 remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
3b625943 1747#endif /* CONFIG_PROC_FS */
1da177e4
LT		 1748}
1749
50c812b2
CM		 1750static int __find_bmc_guid(struct device *dev, void *data)
1751{
1752 unsigned char *id = data;
1753 struct bmc_device *bmc = dev_get_drvdata(dev);
1754 return memcmp(bmc->guid, id, 16) == 0;
1755}
1756
1757static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
1758 unsigned char *guid)
1759{
1760 struct device *dev;
1761
1762 dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
1763 if (dev)
1764 return dev_get_drvdata(dev);
1765 else
1766 return NULL;
1767}
1768
1769struct prod_dev_id {
1770 unsigned int product_id;
1771 unsigned char device_id;
1772};
1773
1774static int __find_bmc_prod_dev_id(struct device *dev, void *data)
1775{
1776 struct prod_dev_id *id = data;
1777 struct bmc_device *bmc = dev_get_drvdata(dev);
1778
1779 return (bmc->id.product_id == id->product_id
1780 && bmc->id.product_id == id->product_id
1781 && bmc->id.device_id == id->device_id);
1782}
1783
1784static struct bmc_device *ipmi_find_bmc_prod_dev_id(
1785 struct device_driver *drv,
1786 unsigned char product_id, unsigned char device_id)
1787{
1788 struct prod_dev_id id = {
1789 .product_id = product_id,
1790 .device_id = device_id,
1791 };
1792 struct device *dev;
1793
1794 dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
1795 if (dev)
1796 return dev_get_drvdata(dev);
1797 else
1798 return NULL;
1799}
1800
1801static ssize_t device_id_show(struct device *dev,
1802 struct device_attribute *attr,
1803 char *buf)
1804{
1805 struct bmc_device *bmc = dev_get_drvdata(dev);
1806
1807 return snprintf(buf, 10, "%u\n", bmc->id.device_id);
1808}
1809
1810static ssize_t provides_dev_sdrs_show(struct device *dev,
1811 struct device_attribute *attr,
1812 char *buf)
1813{
1814 struct bmc_device *bmc = dev_get_drvdata(dev);
1815
1816 return snprintf(buf, 10, "%u\n",
1817 bmc->id.device_revision && 0x80 >> 7);
1818}
1819
1820static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
1821 char *buf)
1822{
1823 struct bmc_device *bmc = dev_get_drvdata(dev);
1824
1825 return snprintf(buf, 20, "%u\n",
1826 bmc->id.device_revision && 0x0F);
1827}
1828
1829static ssize_t firmware_rev_show(struct device *dev,
1830 struct device_attribute *attr,
1831 char *buf)
1832{
1833 struct bmc_device *bmc = dev_get_drvdata(dev);
1834
1835 return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
1836 bmc->id.firmware_revision_2);
1837}
1838
1839static ssize_t ipmi_version_show(struct device *dev,
1840 struct device_attribute *attr,
1841 char *buf)
1842{
1843 struct bmc_device *bmc = dev_get_drvdata(dev);
1844
1845 return snprintf(buf, 20, "%u.%u\n",
1846 ipmi_version_major(&bmc->id),
1847 ipmi_version_minor(&bmc->id));
1848}
1849
1850static ssize_t add_dev_support_show(struct device *dev,
1851 struct device_attribute *attr,
1852 char *buf)
1853{
1854 struct bmc_device *bmc = dev_get_drvdata(dev);
1855
1856 return snprintf(buf, 10, "0x%02x\n",
1857 bmc->id.additional_device_support);
1858}
1859
1860static ssize_t manufacturer_id_show(struct device *dev,
1861 struct device_attribute *attr,
1862 char *buf)
1863{
1864 struct bmc_device *bmc = dev_get_drvdata(dev);
1865
1866 return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
1867}
1868
1869static ssize_t product_id_show(struct device *dev,
1870 struct device_attribute *attr,
1871 char *buf)
1872{
1873 struct bmc_device *bmc = dev_get_drvdata(dev);
1874
1875 return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
1876}
1877
1878static ssize_t aux_firmware_rev_show(struct device *dev,
1879 struct device_attribute *attr,
1880 char *buf)
1881{
1882 struct bmc_device *bmc = dev_get_drvdata(dev);
1883
1884 return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
1885 bmc->id.aux_firmware_revision[3],
1886 bmc->id.aux_firmware_revision[2],
1887 bmc->id.aux_firmware_revision[1],
1888 bmc->id.aux_firmware_revision[0]);
1889}
1890
1891static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
1892 char *buf)
1893{
1894 struct bmc_device *bmc = dev_get_drvdata(dev);
1895
1896 return snprintf(buf, 100, "%Lx%Lx\n",
1897 (long long) bmc->guid[0],
1898 (long long) bmc->guid[8]);
1899}
1900
1901static void
1902cleanup_bmc_device(struct kref *ref)
1903{
1904 struct bmc_device *bmc;
1905
1906 bmc = container_of(ref, struct bmc_device, refcount);
1907
1908 device_remove_file(&bmc->dev->dev,
1909 &bmc->device_id_attr);
1910 device_remove_file(&bmc->dev->dev,
1911 &bmc->provides_dev_sdrs_attr);
1912 device_remove_file(&bmc->dev->dev,
1913 &bmc->revision_attr);
1914 device_remove_file(&bmc->dev->dev,
1915 &bmc->firmware_rev_attr);
1916 device_remove_file(&bmc->dev->dev,
1917 &bmc->version_attr);
1918 device_remove_file(&bmc->dev->dev,
1919 &bmc->add_dev_support_attr);
1920 device_remove_file(&bmc->dev->dev,
1921 &bmc->manufacturer_id_attr);
1922 device_remove_file(&bmc->dev->dev,
1923 &bmc->product_id_attr);
1924 if (bmc->id.aux_firmware_revision_set)
1925 device_remove_file(&bmc->dev->dev,
1926 &bmc->aux_firmware_rev_attr);
1927 if (bmc->guid_set)
1928 device_remove_file(&bmc->dev->dev,
1929 &bmc->guid_attr);
1930 platform_device_unregister(bmc->dev);
1931 kfree(bmc);
1932}
1933
1934static void ipmi_bmc_unregister(ipmi_smi_t intf)
1935{
1936 struct bmc_device *bmc = intf->bmc;
1937
1938 sysfs_remove_link(&intf->si_dev->kobj, "bmc");
1939 if (intf->my_dev_name) {
1940 sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
1941 kfree(intf->my_dev_name);
1942 intf->my_dev_name = NULL;
1943 }
1944
1945 mutex_lock(&ipmidriver_mutex);
1946 kref_put(&bmc->refcount, cleanup_bmc_device);
1947 mutex_unlock(&ipmidriver_mutex);
1948}
1949
1950static int ipmi_bmc_register(ipmi_smi_t intf)
1951{
1952 int rv;
1953 struct bmc_device *bmc = intf->bmc;
1954 struct bmc_device *old_bmc;
1955 int size;
1956 char dummy[1];
1957
1958 mutex_lock(&ipmidriver_mutex);
1959
1960 /*
1961 * Try to find if there is an bmc_device struct
1962 * representing the interfaced BMC already
1963 */
1964 if (bmc->guid_set)
1965 old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid);
1966 else
1967 old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver,
1968 bmc->id.product_id,
1969 bmc->id.device_id);
1970
1971 /*
1972 * If there is already an bmc_device, free the new one,
1973 * otherwise register the new BMC device
1974 */
1975 if (old_bmc) {
1976 kfree(bmc);
1977 intf->bmc = old_bmc;
1978 bmc = old_bmc;
1979
1980 kref_get(&bmc->refcount);
1981 mutex_unlock(&ipmidriver_mutex);
1982
1983 printk(KERN_INFO
1984 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
1985 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
1986 bmc->id.manufacturer_id,
1987 bmc->id.product_id,
1988 bmc->id.device_id);
1989 } else {
1990 bmc->dev = platform_device_alloc("ipmi_bmc",
1991 bmc->id.device_id);
1992 if (! bmc->dev) {
1993 printk(KERN_ERR
1994 "ipmi_msghandler:"
1995 " Unable to allocate platform device\n");
1996 return -ENOMEM;
1997 }
1998 bmc->dev->dev.driver = &ipmidriver;
1999 dev_set_drvdata(&bmc->dev->dev, bmc);
2000 kref_init(&bmc->refcount);
2001
2002 rv = platform_device_register(bmc->dev);
2003 mutex_unlock(&ipmidriver_mutex);
2004 if (rv) {
2005 printk(KERN_ERR
2006 "ipmi_msghandler:"
2007 " Unable to register bmc device: %d\n",
2008 rv);
2009 /* Don't go to out_err, you can only do that if
2010 the device is registered already. */
2011 return rv;
2012 }
2013
2014 bmc->device_id_attr.attr.name = "device_id";
2015 bmc->device_id_attr.attr.owner = THIS_MODULE;
2016 bmc->device_id_attr.attr.mode = S_IRUGO;
2017 bmc->device_id_attr.show = device_id_show;
2018
2019 bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
2020 bmc->provides_dev_sdrs_attr.attr.owner = THIS_MODULE;
2021 bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
2022 bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
2023
2024
2025 bmc->revision_attr.attr.name = "revision";
2026 bmc->revision_attr.attr.owner = THIS_MODULE;
2027 bmc->revision_attr.attr.mode = S_IRUGO;
2028 bmc->revision_attr.show = revision_show;
2029
2030 bmc->firmware_rev_attr.attr.name = "firmware_revision";
2031 bmc->firmware_rev_attr.attr.owner = THIS_MODULE;
2032 bmc->firmware_rev_attr.attr.mode = S_IRUGO;
2033 bmc->firmware_rev_attr.show = firmware_rev_show;
2034
2035 bmc->version_attr.attr.name = "ipmi_version";
2036 bmc->version_attr.attr.owner = THIS_MODULE;
2037 bmc->version_attr.attr.mode = S_IRUGO;
2038 bmc->version_attr.show = ipmi_version_show;
2039
2040 bmc->add_dev_support_attr.attr.name
2041 = "additional_device_support";
2042 bmc->add_dev_support_attr.attr.owner = THIS_MODULE;
2043 bmc->add_dev_support_attr.attr.mode = S_IRUGO;
2044 bmc->add_dev_support_attr.show = add_dev_support_show;
2045
2046 bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
2047 bmc->manufacturer_id_attr.attr.owner = THIS_MODULE;
2048 bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
2049 bmc->manufacturer_id_attr.show = manufacturer_id_show;
2050
2051 bmc->product_id_attr.attr.name = "product_id";
2052 bmc->product_id_attr.attr.owner = THIS_MODULE;
2053 bmc->product_id_attr.attr.mode = S_IRUGO;
2054 bmc->product_id_attr.show = product_id_show;
2055
2056 bmc->guid_attr.attr.name = "guid";
2057 bmc->guid_attr.attr.owner = THIS_MODULE;
2058 bmc->guid_attr.attr.mode = S_IRUGO;
2059 bmc->guid_attr.show = guid_show;
2060
2061 bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
2062 bmc->aux_firmware_rev_attr.attr.owner = THIS_MODULE;
2063 bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
2064 bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
2065
2066 device_create_file(&bmc->dev->dev,
2067 &bmc->device_id_attr);
2068 device_create_file(&bmc->dev->dev,
2069 &bmc->provides_dev_sdrs_attr);
2070 device_create_file(&bmc->dev->dev,
2071 &bmc->revision_attr);
2072 device_create_file(&bmc->dev->dev,
2073 &bmc->firmware_rev_attr);
2074 device_create_file(&bmc->dev->dev,
2075 &bmc->version_attr);
2076 device_create_file(&bmc->dev->dev,
2077 &bmc->add_dev_support_attr);
2078 device_create_file(&bmc->dev->dev,
2079 &bmc->manufacturer_id_attr);
2080 device_create_file(&bmc->dev->dev,
2081 &bmc->product_id_attr);
2082 if (bmc->id.aux_firmware_revision_set)
2083 device_create_file(&bmc->dev->dev,
2084 &bmc->aux_firmware_rev_attr);
2085 if (bmc->guid_set)
2086 device_create_file(&bmc->dev->dev,
2087 &bmc->guid_attr);
2088
2089 printk(KERN_INFO
2090 "ipmi: Found new BMC (man_id: 0x%6.6x, "
2091 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2092 bmc->id.manufacturer_id,
2093 bmc->id.product_id,
2094 bmc->id.device_id);
2095 }
2096
2097 /*
2098 * create symlink from system interface device to bmc device
2099 * and back.
2100 */
2101 rv = sysfs_create_link(&intf->si_dev->kobj,
2102 &bmc->dev->dev.kobj, "bmc");
2103 if (rv) {
2104 printk(KERN_ERR
2105 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2106 rv);
2107 goto out_err;
2108 }
2109
2110 size = snprintf(dummy, 0, "ipmi%d", intf->intf_num);
2111 intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
2112 if (!intf->my_dev_name) {
2113 rv = -ENOMEM;
2114 printk(KERN_ERR
2115 "ipmi_msghandler: allocate link from BMC: %d\n",
2116 rv);
2117 goto out_err;
2118 }
2119 snprintf(intf->my_dev_name, size+1, "ipmi%d", intf->intf_num);
2120
2121 rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
2122 intf->my_dev_name);
2123 if (rv) {
2124 kfree(intf->my_dev_name);
2125 intf->my_dev_name = NULL;
2126 printk(KERN_ERR
2127 "ipmi_msghandler:"
2128 " Unable to create symlink to bmc: %d\n",
2129 rv);
2130 goto out_err;
2131 }
2132
2133 return 0;
2134
2135out_err:
2136 ipmi_bmc_unregister(intf);
2137 return rv;
2138}
2139
2140static int
2141send_guid_cmd(ipmi_smi_t intf, int chan)
2142{
2143 struct kernel_ipmi_msg msg;
2144 struct ipmi_system_interface_addr si;
2145
2146 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2147 si.channel = IPMI_BMC_CHANNEL;
2148 si.lun = 0;
2149
2150 msg.netfn = IPMI_NETFN_APP_REQUEST;
2151 msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2152 msg.data = NULL;
2153 msg.data_len = 0;
2154 return i_ipmi_request(NULL,
2155 intf,
2156 (struct ipmi_addr *) &si,
2157 0,
2158 &msg,
2159 intf,
2160 NULL,
2161 NULL,
2162 0,
2163 intf->channels[0].address,
2164 intf->channels[0].lun,
2165 -1, 0);
2166}
2167
2168static void
2169guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2170{
2171 if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2172 || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2173 || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2174 /* Not for me */
2175 return;
2176
2177 if (msg->msg.data[0] != 0) {
2178 /* Error from getting the GUID, the BMC doesn't have one. */
2179 intf->bmc->guid_set = 0;
2180 goto out;
2181 }
2182
2183 if (msg->msg.data_len < 17) {
2184 intf->bmc->guid_set = 0;
2185 printk(KERN_WARNING PFX
2186 "guid_handler: The GUID response from the BMC was too"
2187 " short, it was %d but should have been 17. Assuming"
2188 " GUID is not available.\n",
2189 msg->msg.data_len);
2190 goto out;
2191 }
2192
2193 memcpy(intf->bmc->guid, msg->msg.data, 16);
2194 intf->bmc->guid_set = 1;
2195 out:
2196 wake_up(&intf->waitq);
2197}
2198
2199static void
2200get_guid(ipmi_smi_t intf)
2201{
2202 int rv;
2203
2204 intf->bmc->guid_set = 0x2;
2205 intf->null_user_handler = guid_handler;
2206 rv = send_guid_cmd(intf, 0);
2207 if (rv)
2208 /* Send failed, no GUID available. */
2209 intf->bmc->guid_set = 0;
2210 wait_event(intf->waitq, intf->bmc->guid_set != 2);
2211 intf->null_user_handler = NULL;
2212}
2213
1da177e4
LT		 2214static int
2215send_channel_info_cmd(ipmi_smi_t intf, int chan)
2216{
2217 struct kernel_ipmi_msg msg;
2218 unsigned char data[1];
2219 struct ipmi_system_interface_addr si;
2220
2221 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2222 si.channel = IPMI_BMC_CHANNEL;
2223 si.lun = 0;
2224
2225 msg.netfn = IPMI_NETFN_APP_REQUEST;
2226 msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2227 msg.data = data;
2228 msg.data_len = 1;
2229 data[0] = chan;
2230 return i_ipmi_request(NULL,
2231 intf,
2232 (struct ipmi_addr *) &si,
2233 0,
2234 &msg,
56a55ec6 2235 intf,
1da177e4
LT		 2236 NULL,
2237 NULL,
2238 0,
c14979b9
CM		 2239 intf->channels[0].address,
2240 intf->channels[0].lun,
1da177e4
LT		 2241 -1, 0);
2242}
2243
2244static void
56a55ec6 2245channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4
LT		 2246{
2247 int rv = 0;
2248 int chan;
2249
56a55ec6
CM		 2250 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2251 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
2252 && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD))
1da177e4
LT		 2253 {
2254 /* It's the one we want */
56a55ec6 2255 if (msg->msg.data[0] != 0) {
1da177e4
LT		 2256 /* Got an error from the channel, just go on. */
2257
56a55ec6 2258 if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
1da177e4
LT		 2259 /* If the MC does not support this
2260 command, that is legal. We just
2261 assume it has one IPMB at channel
2262 zero. */
2263 intf->channels[0].medium
2264 = IPMI_CHANNEL_MEDIUM_IPMB;
2265 intf->channels[0].protocol
2266 = IPMI_CHANNEL_PROTOCOL_IPMB;
2267 rv = -ENOSYS;
2268
2269 intf->curr_channel = IPMI_MAX_CHANNELS;
2270 wake_up(&intf->waitq);
2271 goto out;
2272 }
2273 goto next_channel;
2274 }
56a55ec6 2275 if (msg->msg.data_len < 4) {
1da177e4
LT		 2276 /* Message not big enough, just go on. */
2277 goto next_channel;
2278 }
2279 chan = intf->curr_channel;
56a55ec6
CM		 2280 intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2281 intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
1da177e4
LT		 2282
2283 next_channel:
2284 intf->curr_channel++;
2285 if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2286 wake_up(&intf->waitq);
2287 else
2288 rv = send_channel_info_cmd(intf, intf->curr_channel);
2289
2290 if (rv) {
2291 /* Got an error somehow, just give up. */
2292 intf->curr_channel = IPMI_MAX_CHANNELS;
2293 wake_up(&intf->waitq);
2294
2295 printk(KERN_WARNING PFX
2296 "Error sending channel information: %d\n",
2297 rv);
2298 }
2299 }
2300 out:
2301 return;
2302}
2303
2304int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2305 void *send_info,
50c812b2
CM		 2306 struct ipmi_device_id *device_id,
2307 struct device *si_dev,
1da177e4 2308 unsigned char slave_addr,
393d2cc3 2309 ipmi_smi_t *new_intf)
1da177e4
LT		 2310{
2311 int i, j;
2312 int rv;
393d2cc3 2313 ipmi_smi_t intf;
1da177e4 2314 unsigned long flags;
50c812b2
CM		 2315 int version_major;
2316 int version_minor;
1da177e4 2317
50c812b2
CM		 2318 version_major = ipmi_version_major(device_id);
2319 version_minor = ipmi_version_minor(device_id);
1da177e4
LT		 2320
2321 /* Make sure the driver is actually initialized, this handles
2322 problems with initialization order. */
2323 if (!initialized) {
2324 rv = ipmi_init_msghandler();
2325 if (rv)
2326 return rv;
2327 /* The init code doesn't return an error if it was turned
2328 off, but it won't initialize. Check that. */
2329 if (!initialized)
2330 return -ENODEV;
2331 }
2332
393d2cc3
CM		 2333 intf = kmalloc(sizeof(*intf), GFP_KERNEL);
2334 if (!intf)
1da177e4 2335 return -ENOMEM;
393d2cc3 2336 memset(intf, 0, sizeof(*intf));
50c812b2
CM		 2337 intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2338 if (!intf->bmc) {
2339 kfree(intf);
2340 return -ENOMEM;
2341 }
393d2cc3
CM		 2342 intf->intf_num = -1;
2343 kref_init(&intf->refcount);
50c812b2
CM		 2344 intf->bmc->id = *device_id;
2345 intf->si_dev = si_dev;
393d2cc3
CM		 2346 for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2347 intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2348 intf->channels[j].lun = 2;
2349 }
2350 if (slave_addr != 0)
2351 intf->channels[0].address = slave_addr;
2352 INIT_LIST_HEAD(&intf->users);
2353 intf->handlers = handlers;
2354 intf->send_info = send_info;
2355 spin_lock_init(&intf->seq_lock);
2356 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2357 intf->seq_table[j].inuse = 0;
2358 intf->seq_table[j].seqid = 0;
2359 }
2360 intf->curr_seq = 0;
2361#ifdef CONFIG_PROC_FS
2362 spin_lock_init(&intf->proc_entry_lock);
2363#endif
2364 spin_lock_init(&intf->waiting_msgs_lock);
2365 INIT_LIST_HEAD(&intf->waiting_msgs);
2366 spin_lock_init(&intf->events_lock);
2367 INIT_LIST_HEAD(&intf->waiting_events);
2368 intf->waiting_events_count = 0;
e61fb5b6 2369 init_MUTEX(&intf->cmd_rcvrs_lock);
393d2cc3
CM		 2370 INIT_LIST_HEAD(&intf->cmd_rcvrs);
2371 init_waitqueue_head(&intf->waitq);
2372
2373 spin_lock_init(&intf->counter_lock);
2374 intf->proc_dir = NULL;
1da177e4
LT		 2375
2376 rv = -ENOMEM;
393d2cc3 2377 spin_lock_irqsave(&interfaces_lock, flags);
e8b33617 2378 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4 2379 if (ipmi_interfaces[i] == NULL) {
393d2cc3
CM		 2380 intf->intf_num = i;
2381 /* Reserve the entry till we are done. */
2382 ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY;
1da177e4 2383 rv = 0;
1da177e4
LT		 2384 break;
2385 }
2386 }
393d2cc3
CM		 2387 spin_unlock_irqrestore(&interfaces_lock, flags);
2388 if (rv)
2389 goto out;
1da177e4 2390
393d2cc3
CM		 2391 /* FIXME - this is an ugly kludge, this sets the intf for the
2392 caller before sending any messages with it. */
2393 *new_intf = intf;
1da177e4 2394
50c812b2
CM		 2395 get_guid(intf);
2396
393d2cc3
CM		 2397 if ((version_major > 1)
2398 || ((version_major == 1) && (version_minor >= 5)))
2399 {
2400 /* Start scanning the channels to see what is
2401 available. */
2402 intf->null_user_handler = channel_handler;
2403 intf->curr_channel = 0;
2404 rv = send_channel_info_cmd(intf, 0);
2405 if (rv)
2406 goto out;
1da177e4 2407
393d2cc3
CM		 2408 /* Wait for the channel info to be read. */
2409 wait_event(intf->waitq,
2410 intf->curr_channel >= IPMI_MAX_CHANNELS);
50c812b2 2411 intf->null_user_handler = NULL;
393d2cc3
CM		 2412 } else {
2413 /* Assume a single IPMB channel at zero. */
2414 intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2415 intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
1da177e4
LT		 2416 }
2417
393d2cc3
CM		 2418 if (rv == 0)
2419 rv = add_proc_entries(intf, i);
1da177e4 2420
50c812b2
CM		 2421 rv = ipmi_bmc_register(intf);
2422
393d2cc3 2423 out:
1da177e4 2424 if (rv) {
393d2cc3
CM		 2425 if (intf->proc_dir)
2426 remove_proc_entries(intf);
2427 kref_put(&intf->refcount, intf_free);
2428 if (i < MAX_IPMI_INTERFACES) {
2429 spin_lock_irqsave(&interfaces_lock, flags);
2430 ipmi_interfaces[i] = NULL;
2431 spin_unlock_irqrestore(&interfaces_lock, flags);
2432 }
2433 } else {
2434 spin_lock_irqsave(&interfaces_lock, flags);
2435 ipmi_interfaces[i] = intf;
2436 spin_unlock_irqrestore(&interfaces_lock, flags);
50c812b2 2437 call_smi_watchers(i, intf->si_dev);
1da177e4
LT		 2438 }
2439
2440 return rv;
2441}
2442
1da177e4
LT		 2443int ipmi_unregister_smi(ipmi_smi_t intf)
2444{
1da177e4
LT		 2445 int i;
2446 struct ipmi_smi_watcher *w;
2447 unsigned long flags;
2448
50c812b2
CM		 2449 ipmi_bmc_unregister(intf);
2450
393d2cc3
CM		 2451 spin_lock_irqsave(&interfaces_lock, flags);
2452 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
2453 if (ipmi_interfaces[i] == intf) {
2454 /* Set the interface number reserved until we
2455 * are done. */
2456 ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY;
2457 intf->intf_num = -1;
2458 break;
1da177e4 2459 }
1da177e4 2460 }
393d2cc3 2461 spin_unlock_irqrestore(&interfaces_lock,flags);
1da177e4 2462
393d2cc3
CM		 2463 if (i == MAX_IPMI_INTERFACES)
2464 return -ENODEV;
1da177e4 2465
393d2cc3 2466 remove_proc_entries(intf);
1da177e4
LT		 2467
2468 /* Call all the watcher interfaces to tell them that
2469 an interface is gone. */
2470 down_read(&smi_watchers_sem);
393d2cc3 2471 list_for_each_entry(w, &smi_watchers, link)
1da177e4 2472 w->smi_gone(i);
1da177e4 2473 up_read(&smi_watchers_sem);
393d2cc3
CM		 2474
2475 /* Allow the entry to be reused now. */
2476 spin_lock_irqsave(&interfaces_lock, flags);
2477 ipmi_interfaces[i] = NULL;
2478 spin_unlock_irqrestore(&interfaces_lock,flags);
2479
2480 kref_put(&intf->refcount, intf_free);
1da177e4
LT		 2481 return 0;
2482}
2483
2484static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
2485 struct ipmi_smi_msg *msg)
2486{
2487 struct ipmi_ipmb_addr ipmb_addr;
2488 struct ipmi_recv_msg *recv_msg;
2489 unsigned long flags;
2490
2491
2492 /* This is 11, not 10, because the response must contain a
2493 * completion code. */
2494 if (msg->rsp_size < 11) {
2495 /* Message not big enough, just ignore it. */
2496 spin_lock_irqsave(&intf->counter_lock, flags);
2497 intf->invalid_ipmb_responses++;
2498 spin_unlock_irqrestore(&intf->counter_lock, flags);
2499 return 0;
2500 }
2501
2502 if (msg->rsp[2] != 0) {
2503 /* An error getting the response, just ignore it. */
2504 return 0;
2505 }
2506
2507 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
2508 ipmb_addr.slave_addr = msg->rsp[6];
2509 ipmb_addr.channel = msg->rsp[3] & 0x0f;
2510 ipmb_addr.lun = msg->rsp[7] & 3;
2511
2512 /* It's a response from a remote entity. Look up the sequence
2513 number and handle the response. */
2514 if (intf_find_seq(intf,
2515 msg->rsp[7] >> 2,
2516 msg->rsp[3] & 0x0f,
2517 msg->rsp[8],
2518 (msg->rsp[4] >> 2) & (~1),
2519 (struct ipmi_addr *) &(ipmb_addr),
2520 &recv_msg))
2521 {
2522 /* We were unable to find the sequence number,
2523 so just nuke the message. */
2524 spin_lock_irqsave(&intf->counter_lock, flags);
2525 intf->unhandled_ipmb_responses++;
2526 spin_unlock_irqrestore(&intf->counter_lock, flags);
2527 return 0;
2528 }
2529
2530 memcpy(recv_msg->msg_data,
2531 &(msg->rsp[9]),
2532 msg->rsp_size - 9);
2533 /* THe other fields matched, so no need to set them, except
2534 for netfn, which needs to be the response that was
2535 returned, not the request value. */
2536 recv_msg->msg.netfn = msg->rsp[4] >> 2;
2537 recv_msg->msg.data = recv_msg->msg_data;
2538 recv_msg->msg.data_len = msg->rsp_size - 10;
2539 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2540 spin_lock_irqsave(&intf->counter_lock, flags);
2541 intf->handled_ipmb_responses++;
2542 spin_unlock_irqrestore(&intf->counter_lock, flags);
2543 deliver_response(recv_msg);
2544
2545 return 0;
2546}
2547
2548static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
2549 struct ipmi_smi_msg *msg)
2550{
393d2cc3
CM		 2551 struct cmd_rcvr *rcvr;
2552 int rv = 0;
2553 unsigned char netfn;
2554 unsigned char cmd;
2555 ipmi_user_t user = NULL;
2556 struct ipmi_ipmb_addr *ipmb_addr;
2557 struct ipmi_recv_msg *recv_msg;
2558 unsigned long flags;
1da177e4
LT		 2559
2560 if (msg->rsp_size < 10) {
2561 /* Message not big enough, just ignore it. */
2562 spin_lock_irqsave(&intf->counter_lock, flags);
2563 intf->invalid_commands++;
2564 spin_unlock_irqrestore(&intf->counter_lock, flags);
2565 return 0;
2566 }
2567
2568 if (msg->rsp[2] != 0) {
2569 /* An error getting the response, just ignore it. */
2570 return 0;
2571 }
2572
2573 netfn = msg->rsp[4] >> 2;
2574 cmd = msg->rsp[8];
2575
e61fb5b6 2576 rcu_read_lock();
393d2cc3
CM		 2577 rcvr = find_cmd_rcvr(intf, netfn, cmd);
2578 if (rcvr) {
2579 user = rcvr->user;
2580 kref_get(&user->refcount);
2581 } else
2582 user = NULL;
e61fb5b6 2583 rcu_read_unlock();
1da177e4
LT		 2584
2585 if (user == NULL) {
2586 /* We didn't find a user, deliver an error response. */
2587 spin_lock_irqsave(&intf->counter_lock, flags);
2588 intf->unhandled_commands++;
2589 spin_unlock_irqrestore(&intf->counter_lock, flags);
2590
2591 msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
2592 msg->data[1] = IPMI_SEND_MSG_CMD;
2593 msg->data[2] = msg->rsp[3];
2594 msg->data[3] = msg->rsp[6];
2595 msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
2596 msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
c14979b9 2597 msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
1da177e4
LT		 2598 /* rqseq/lun */
2599 msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
2600 msg->data[8] = msg->rsp[8]; /* cmd */
2601 msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
2602 msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
2603 msg->data_size = 11;
2604
2605#ifdef DEBUG_MSGING
2606 {
2607 int m;
2608 printk("Invalid command:");
e8b33617 2609 for (m = 0; m < msg->data_size; m++)
1da177e4
LT		 2610 printk(" %2.2x", msg->data[m]);
2611 printk("\n");
2612 }
2613#endif
2614 intf->handlers->sender(intf->send_info, msg, 0);
2615
2616 rv = -1; /* We used the message, so return the value that
2617 causes it to not be freed or queued. */
2618 } else {
2619 /* Deliver the message to the user. */
2620 spin_lock_irqsave(&intf->counter_lock, flags);
2621 intf->handled_commands++;
2622 spin_unlock_irqrestore(&intf->counter_lock, flags);
2623
2624 recv_msg = ipmi_alloc_recv_msg();
2625 if (! recv_msg) {
2626 /* We couldn't allocate memory for the
2627 message, so requeue it for handling
2628 later. */
2629 rv = 1;
393d2cc3 2630 kref_put(&user->refcount, free_user);
1da177e4
LT		 2631 } else {
2632 /* Extract the source address from the data. */
2633 ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
2634 ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
2635 ipmb_addr->slave_addr = msg->rsp[6];
2636 ipmb_addr->lun = msg->rsp[7] & 3;
2637 ipmb_addr->channel = msg->rsp[3] & 0xf;
2638
2639 /* Extract the rest of the message information
2640 from the IPMB header.*/
2641 recv_msg->user = user;
2642 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
2643 recv_msg->msgid = msg->rsp[7] >> 2;
2644 recv_msg->msg.netfn = msg->rsp[4] >> 2;
2645 recv_msg->msg.cmd = msg->rsp[8];
2646 recv_msg->msg.data = recv_msg->msg_data;
2647
2648 /* We chop off 10, not 9 bytes because the checksum
2649 at the end also needs to be removed. */
2650 recv_msg->msg.data_len = msg->rsp_size - 10;
2651 memcpy(recv_msg->msg_data,
2652 &(msg->rsp[9]),
2653 msg->rsp_size - 10);
2654 deliver_response(recv_msg);
2655 }
2656 }
2657
2658 return rv;
2659}
2660
2661static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
2662 struct ipmi_smi_msg *msg)
2663{
2664 struct ipmi_lan_addr lan_addr;
2665 struct ipmi_recv_msg *recv_msg;
2666 unsigned long flags;
2667
2668
2669 /* This is 13, not 12, because the response must contain a
2670 * completion code. */
2671 if (msg->rsp_size < 13) {
2672 /* Message not big enough, just ignore it. */
2673 spin_lock_irqsave(&intf->counter_lock, flags);
2674 intf->invalid_lan_responses++;
2675 spin_unlock_irqrestore(&intf->counter_lock, flags);
2676 return 0;
2677 }
2678
2679 if (msg->rsp[2] != 0) {
2680 /* An error getting the response, just ignore it. */
2681 return 0;
2682 }
2683
2684 lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
2685 lan_addr.session_handle = msg->rsp[4];
2686 lan_addr.remote_SWID = msg->rsp[8];
2687 lan_addr.local_SWID = msg->rsp[5];
2688 lan_addr.channel = msg->rsp[3] & 0x0f;
2689 lan_addr.privilege = msg->rsp[3] >> 4;
2690 lan_addr.lun = msg->rsp[9] & 3;
2691
2692 /* It's a response from a remote entity. Look up the sequence
2693 number and handle the response. */
2694 if (intf_find_seq(intf,
2695 msg->rsp[9] >> 2,
2696 msg->rsp[3] & 0x0f,
2697 msg->rsp[10],
2698 (msg->rsp[6] >> 2) & (~1),
2699 (struct ipmi_addr *) &(lan_addr),
2700 &recv_msg))
2701 {
2702 /* We were unable to find the sequence number,
2703 so just nuke the message. */
2704 spin_lock_irqsave(&intf->counter_lock, flags);
2705 intf->unhandled_lan_responses++;
2706 spin_unlock_irqrestore(&intf->counter_lock, flags);
2707 return 0;
2708 }
2709
2710 memcpy(recv_msg->msg_data,
2711 &(msg->rsp[11]),
2712 msg->rsp_size - 11);
2713 /* The other fields matched, so no need to set them, except
2714 for netfn, which needs to be the response that was
2715 returned, not the request value. */
2716 recv_msg->msg.netfn = msg->rsp[6] >> 2;
2717 recv_msg->msg.data = recv_msg->msg_data;
2718 recv_msg->msg.data_len = msg->rsp_size - 12;
2719 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2720 spin_lock_irqsave(&intf->counter_lock, flags);
2721 intf->handled_lan_responses++;
2722 spin_unlock_irqrestore(&intf->counter_lock, flags);
2723 deliver_response(recv_msg);
2724
2725 return 0;
2726}
2727
2728static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
2729 struct ipmi_smi_msg *msg)
2730{
393d2cc3
CM		 2731 struct cmd_rcvr *rcvr;
2732 int rv = 0;
2733 unsigned char netfn;
2734 unsigned char cmd;
2735 ipmi_user_t user = NULL;
2736 struct ipmi_lan_addr *lan_addr;
2737 struct ipmi_recv_msg *recv_msg;
2738 unsigned long flags;
1da177e4
LT		 2739
2740 if (msg->rsp_size < 12) {
2741 /* Message not big enough, just ignore it. */
2742 spin_lock_irqsave(&intf->counter_lock, flags);
2743 intf->invalid_commands++;
2744 spin_unlock_irqrestore(&intf->counter_lock, flags);
2745 return 0;
2746 }
2747
2748 if (msg->rsp[2] != 0) {
2749 /* An error getting the response, just ignore it. */
2750 return 0;
2751 }
2752
2753 netfn = msg->rsp[6] >> 2;
2754 cmd = msg->rsp[10];
2755
e61fb5b6 2756 rcu_read_lock();
393d2cc3
CM		 2757 rcvr = find_cmd_rcvr(intf, netfn, cmd);
2758 if (rcvr) {
2759 user = rcvr->user;
2760 kref_get(&user->refcount);
2761 } else
2762 user = NULL;
e61fb5b6 2763 rcu_read_unlock();
1da177e4
LT		 2764
2765 if (user == NULL) {
393d2cc3 2766 /* We didn't find a user, just give up. */
1da177e4
LT		 2767 spin_lock_irqsave(&intf->counter_lock, flags);
2768 intf->unhandled_commands++;
2769 spin_unlock_irqrestore(&intf->counter_lock, flags);
2770
2771 rv = 0; /* Don't do anything with these messages, just
2772 allow them to be freed. */
2773 } else {
2774 /* Deliver the message to the user. */
2775 spin_lock_irqsave(&intf->counter_lock, flags);
2776 intf->handled_commands++;
2777 spin_unlock_irqrestore(&intf->counter_lock, flags);
2778
2779 recv_msg = ipmi_alloc_recv_msg();
2780 if (! recv_msg) {
2781 /* We couldn't allocate memory for the
2782 message, so requeue it for handling
2783 later. */
2784 rv = 1;
393d2cc3 2785 kref_put(&user->refcount, free_user);
1da177e4
LT		 2786 } else {
2787 /* Extract the source address from the data. */
2788 lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
2789 lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
2790 lan_addr->session_handle = msg->rsp[4];
2791 lan_addr->remote_SWID = msg->rsp[8];
2792 lan_addr->local_SWID = msg->rsp[5];
2793 lan_addr->lun = msg->rsp[9] & 3;
2794 lan_addr->channel = msg->rsp[3] & 0xf;
2795 lan_addr->privilege = msg->rsp[3] >> 4;
2796
2797 /* Extract the rest of the message information
2798 from the IPMB header.*/
2799 recv_msg->user = user;
2800 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
2801 recv_msg->msgid = msg->rsp[9] >> 2;
2802 recv_msg->msg.netfn = msg->rsp[6] >> 2;
2803 recv_msg->msg.cmd = msg->rsp[10];
2804 recv_msg->msg.data = recv_msg->msg_data;
2805
2806 /* We chop off 12, not 11 bytes because the checksum
2807 at the end also needs to be removed. */
2808 recv_msg->msg.data_len = msg->rsp_size - 12;
2809 memcpy(recv_msg->msg_data,
2810 &(msg->rsp[11]),
2811 msg->rsp_size - 12);
2812 deliver_response(recv_msg);
2813 }
2814 }
2815
2816 return rv;
2817}
2818
2819static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
2820 struct ipmi_smi_msg *msg)
2821{
2822 struct ipmi_system_interface_addr *smi_addr;
2823
2824 recv_msg->msgid = 0;
2825 smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
2826 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2827 smi_addr->channel = IPMI_BMC_CHANNEL;
2828 smi_addr->lun = msg->rsp[0] & 3;
2829 recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
2830 recv_msg->msg.netfn = msg->rsp[0] >> 2;
2831 recv_msg->msg.cmd = msg->rsp[1];
2832 memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
2833 recv_msg->msg.data = recv_msg->msg_data;
2834 recv_msg->msg.data_len = msg->rsp_size - 3;
2835}
2836
1da177e4
LT		 2837static int handle_read_event_rsp(ipmi_smi_t intf,
2838 struct ipmi_smi_msg *msg)
2839{
2840 struct ipmi_recv_msg *recv_msg, *recv_msg2;
2841 struct list_head msgs;
2842 ipmi_user_t user;
2843 int rv = 0;
2844 int deliver_count = 0;
2845 unsigned long flags;
2846
2847 if (msg->rsp_size < 19) {
2848 /* Message is too small to be an IPMB event. */
2849 spin_lock_irqsave(&intf->counter_lock, flags);
2850 intf->invalid_events++;
2851 spin_unlock_irqrestore(&intf->counter_lock, flags);
2852 return 0;
2853 }
2854
2855 if (msg->rsp[2] != 0) {
2856 /* An error getting the event, just ignore it. */
2857 return 0;
2858 }
2859
2860 INIT_LIST_HEAD(&msgs);
2861
393d2cc3 2862 spin_lock_irqsave(&intf->events_lock, flags);
1da177e4
LT		 2863
2864 spin_lock(&intf->counter_lock);
2865 intf->events++;
2866 spin_unlock(&intf->counter_lock);
2867
2868 /* Allocate and fill in one message for every user that is getting
2869 events. */
393d2cc3
CM		 2870 rcu_read_lock();
2871 list_for_each_entry_rcu(user, &intf->users, link) {
1da177e4
LT		 2872 if (! user->gets_events)
2873 continue;
2874
2875 recv_msg = ipmi_alloc_recv_msg();
2876 if (! recv_msg) {
393d2cc3 2877 rcu_read_unlock();
1da177e4
LT		 2878 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
2879 list_del(&recv_msg->link);
2880 ipmi_free_recv_msg(recv_msg);
2881 }
2882 /* We couldn't allocate memory for the
2883 message, so requeue it for handling
2884 later. */
2885 rv = 1;
2886 goto out;
2887 }
2888
2889 deliver_count++;
2890
2891 copy_event_into_recv_msg(recv_msg, msg);
2892 recv_msg->user = user;
393d2cc3 2893 kref_get(&user->refcount);
1da177e4
LT		 2894 list_add_tail(&(recv_msg->link), &msgs);
2895 }
393d2cc3 2896 rcu_read_unlock();
1da177e4
LT		 2897
2898 if (deliver_count) {
2899 /* Now deliver all the messages. */
2900 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
2901 list_del(&recv_msg->link);
2902 deliver_response(recv_msg);
2903 }
2904 } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
2905 /* No one to receive the message, put it in queue if there's
2906 not already too many things in the queue. */
2907 recv_msg = ipmi_alloc_recv_msg();
2908 if (! recv_msg) {
2909 /* We couldn't allocate memory for the
2910 message, so requeue it for handling
2911 later. */
2912 rv = 1;
2913 goto out;
2914 }
2915
2916 copy_event_into_recv_msg(recv_msg, msg);
2917 list_add_tail(&(recv_msg->link), &(intf->waiting_events));
2918 } else {
2919 /* There's too many things in the queue, discard this
2920 message. */
2921 printk(KERN_WARNING PFX "Event queue full, discarding an"
2922 " incoming event\n");
2923 }
2924
2925 out:
2926 spin_unlock_irqrestore(&(intf->events_lock), flags);
2927
2928 return rv;
2929}
2930
2931static int handle_bmc_rsp(ipmi_smi_t intf,
2932 struct ipmi_smi_msg *msg)
2933{
2934 struct ipmi_recv_msg *recv_msg;
1da177e4 2935 unsigned long flags;
393d2cc3 2936 struct ipmi_user *user;
1da177e4
LT		 2937
2938 recv_msg = (struct ipmi_recv_msg *) msg->user_data;
56a55ec6
CM		 2939 if (recv_msg == NULL)
2940 {
2941 printk(KERN_WARNING"IPMI message received with no owner. This\n"
2942 "could be because of a malformed message, or\n"
2943 "because of a hardware error. Contact your\n"
2944 "hardware vender for assistance\n");
2945 return 0;
2946 }
1da177e4 2947
393d2cc3 2948 user = recv_msg->user;
1da177e4 2949 /* Make sure the user still exists. */
393d2cc3 2950 if (user && !user->valid) {
56a55ec6
CM		 2951 /* The user for the message went away, so give up. */
2952 spin_lock_irqsave(&intf->counter_lock, flags);
2953 intf->unhandled_local_responses++;
2954 spin_unlock_irqrestore(&intf->counter_lock, flags);
1da177e4
LT		 2955 ipmi_free_recv_msg(recv_msg);
2956 } else {
2957 struct ipmi_system_interface_addr *smi_addr;
2958
2959 spin_lock_irqsave(&intf->counter_lock, flags);
2960 intf->handled_local_responses++;
2961 spin_unlock_irqrestore(&intf->counter_lock, flags);
2962 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2963 recv_msg->msgid = msg->msgid;
2964 smi_addr = ((struct ipmi_system_interface_addr *)
2965 &(recv_msg->addr));
2966 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2967 smi_addr->channel = IPMI_BMC_CHANNEL;
2968 smi_addr->lun = msg->rsp[0] & 3;
2969 recv_msg->msg.netfn = msg->rsp[0] >> 2;
2970 recv_msg->msg.cmd = msg->rsp[1];
2971 memcpy(recv_msg->msg_data,
2972 &(msg->rsp[2]),
2973 msg->rsp_size - 2);
2974 recv_msg->msg.data = recv_msg->msg_data;
2975 recv_msg->msg.data_len = msg->rsp_size - 2;
2976 deliver_response(recv_msg);
2977 }
2978
2979 return 0;
2980}
2981
2982/* Handle a new message. Return 1 if the message should be requeued,
2983 0 if the message should be freed, or -1 if the message should not
2984 be freed or requeued. */
2985static int handle_new_recv_msg(ipmi_smi_t intf,
2986 struct ipmi_smi_msg *msg)
2987{
2988 int requeue;
2989 int chan;
2990
2991#ifdef DEBUG_MSGING
2992 int m;
2993 printk("Recv:");
e8b33617 2994 for (m = 0; m < msg->rsp_size; m++)
1da177e4
LT		 2995 printk(" %2.2x", msg->rsp[m]);
2996 printk("\n");
2997#endif
2998 if (msg->rsp_size < 2) {
2999 /* Message is too small to be correct. */
3000 printk(KERN_WARNING PFX "BMC returned to small a message"
3001 " for netfn %x cmd %x, got %d bytes\n",
3002 (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3003
3004 /* Generate an error response for the message. */
3005 msg->rsp[0] = msg->data[0] | (1 << 2);
3006 msg->rsp[1] = msg->data[1];
3007 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3008 msg->rsp_size = 3;
3009 } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))/* Netfn */
3010 || (msg->rsp[1] != msg->data[1])) /* Command */
3011 {
3012 /* The response is not even marginally correct. */
3013 printk(KERN_WARNING PFX "BMC returned incorrect response,"
3014 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3015 (msg->data[0] >> 2) | 1, msg->data[1],
3016 msg->rsp[0] >> 2, msg->rsp[1]);
3017
3018 /* Generate an error response for the message. */
3019 msg->rsp[0] = msg->data[0] | (1 << 2);
3020 msg->rsp[1] = msg->data[1];
3021 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3022 msg->rsp_size = 3;
3023 }
3024
3025 if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3026 && (msg->rsp[1] == IPMI_SEND_MSG_CMD)
3027 && (msg->user_data != NULL))
3028 {
3029 /* It's a response to a response we sent. For this we
3030 deliver a send message response to the user. */
393d2cc3 3031 struct ipmi_recv_msg *recv_msg = msg->user_data;
1da177e4
LT		 3032
3033 requeue = 0;
3034 if (msg->rsp_size < 2)
3035 /* Message is too small to be correct. */
3036 goto out;
3037
3038 chan = msg->data[2] & 0x0f;
3039 if (chan >= IPMI_MAX_CHANNELS)
3040 /* Invalid channel number */
3041 goto out;
3042
393d2cc3
CM		 3043 if (!recv_msg)
3044 goto out;
3045
3046 /* Make sure the user still exists. */
3047 if (!recv_msg->user || !recv_msg->user->valid)
3048 goto out;
3049
3050 recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3051 recv_msg->msg.data = recv_msg->msg_data;
3052 recv_msg->msg.data_len = 1;
3053 recv_msg->msg_data[0] = msg->rsp[2];
3054 deliver_response(recv_msg);
1da177e4
LT		 3055 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3056 && (msg->rsp[1] == IPMI_GET_MSG_CMD))
3057 {
3058 /* It's from the receive queue. */
3059 chan = msg->rsp[3] & 0xf;
3060 if (chan >= IPMI_MAX_CHANNELS) {
3061 /* Invalid channel number */
3062 requeue = 0;
3063 goto out;
3064 }
3065
3066 switch (intf->channels[chan].medium) {
3067 case IPMI_CHANNEL_MEDIUM_IPMB:
3068 if (msg->rsp[4] & 0x04) {
3069 /* It's a response, so find the
3070 requesting message and send it up. */
3071 requeue = handle_ipmb_get_msg_rsp(intf, msg);
3072 } else {
3073 /* It's a command to the SMS from some other
3074 entity. Handle that. */
3075 requeue = handle_ipmb_get_msg_cmd(intf, msg);
3076 }
3077 break;
3078
3079 case IPMI_CHANNEL_MEDIUM_8023LAN:
3080 case IPMI_CHANNEL_MEDIUM_ASYNC:
3081 if (msg->rsp[6] & 0x04) {
3082 /* It's a response, so find the
3083 requesting message and send it up. */
3084 requeue = handle_lan_get_msg_rsp(intf, msg);
3085 } else {
3086 /* It's a command to the SMS from some other
3087 entity. Handle that. */
3088 requeue = handle_lan_get_msg_cmd(intf, msg);
3089 }
3090 break;
3091
3092 default:
3093 /* We don't handle the channel type, so just
3094 * free the message. */
3095 requeue = 0;
3096 }
3097
3098 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3099 && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD))
3100 {
3101 /* It's an asyncronous event. */
3102 requeue = handle_read_event_rsp(intf, msg);
3103 } else {
3104 /* It's a response from the local BMC. */
3105 requeue = handle_bmc_rsp(intf, msg);
3106 }
3107
3108 out:
3109 return requeue;
3110}
3111
3112/* Handle a new message from the lower layer. */
3113void ipmi_smi_msg_received(ipmi_smi_t intf,
3114 struct ipmi_smi_msg *msg)
3115{
3116 unsigned long flags;
3117 int rv;
3118
3119
1da177e4
LT		 3120 if ((msg->data_size >= 2)
3121 && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3122 && (msg->data[1] == IPMI_SEND_MSG_CMD)
393d2cc3
CM		 3123 && (msg->user_data == NULL))
3124 {
1da177e4
LT		 3125 /* This is the local response to a command send, start
3126 the timer for these. The user_data will not be
3127 NULL if this is a response send, and we will let
3128 response sends just go through. */
3129
3130 /* Check for errors, if we get certain errors (ones
3131 that mean basically we can try again later), we
3132 ignore them and start the timer. Otherwise we
3133 report the error immediately. */
3134 if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3135 && (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
3136 && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR))
3137 {
3138 int chan = msg->rsp[3] & 0xf;
3139
3140 /* Got an error sending the message, handle it. */
3141 spin_lock_irqsave(&intf->counter_lock, flags);
3142 if (chan >= IPMI_MAX_CHANNELS)
3143 ; /* This shouldn't happen */
3144 else if ((intf->channels[chan].medium
3145 == IPMI_CHANNEL_MEDIUM_8023LAN)
3146 || (intf->channels[chan].medium
3147 == IPMI_CHANNEL_MEDIUM_ASYNC))
3148 intf->sent_lan_command_errs++;
3149 else
3150 intf->sent_ipmb_command_errs++;
3151 spin_unlock_irqrestore(&intf->counter_lock, flags);
3152 intf_err_seq(intf, msg->msgid, msg->rsp[2]);
3153 } else {
3154 /* The message was sent, start the timer. */
3155 intf_start_seq_timer(intf, msg->msgid);
3156 }
3157
3158 ipmi_free_smi_msg(msg);
393d2cc3 3159 goto out;
1da177e4
LT		 3160 }
3161
3162 /* To preserve message order, if the list is not empty, we
3163 tack this message onto the end of the list. */
393d2cc3
CM		 3164 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3165 if (!list_empty(&intf->waiting_msgs)) {
3166 list_add_tail(&msg->link, &intf->waiting_msgs);
177294d1 3167 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
393d2cc3 3168 goto out;
1da177e4 3169 }
393d2cc3 3170 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
1da177e4
LT		 3171
3172 rv = handle_new_recv_msg(intf, msg);
3173 if (rv > 0) {
3174 /* Could not handle the message now, just add it to a
3175 list to handle later. */
177294d1 3176 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
393d2cc3 3177 list_add_tail(&msg->link, &intf->waiting_msgs);
177294d1 3178 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
1da177e4
LT		 3179 } else if (rv == 0) {
3180 ipmi_free_smi_msg(msg);
3181 }
3182
393d2cc3
CM		 3183 out:
3184 return;
1da177e4
LT		 3185}
3186
3187void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3188{
3189 ipmi_user_t user;
3190
393d2cc3
CM		 3191 rcu_read_lock();
3192 list_for_each_entry_rcu(user, &intf->users, link) {
1da177e4
LT		 3193 if (! user->handler->ipmi_watchdog_pretimeout)
3194 continue;
3195
3196 user->handler->ipmi_watchdog_pretimeout(user->handler_data);
3197 }
393d2cc3 3198 rcu_read_unlock();
1da177e4
LT		 3199}
3200
3201static void
3202handle_msg_timeout(struct ipmi_recv_msg *msg)
3203{
3204 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3205 msg->msg_data[0] = IPMI_TIMEOUT_COMPLETION_CODE;
3206 msg->msg.netfn |= 1; /* Convert to a response. */
3207 msg->msg.data_len = 1;
3208 msg->msg.data = msg->msg_data;
3209 deliver_response(msg);
3210}
3211
882fe011
CM		 3212static struct ipmi_smi_msg *
3213smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3214 unsigned char seq, long seqid)
1da177e4 3215{
882fe011 3216 struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
1da177e4
LT		 3217 if (!smi_msg)
3218 /* If we can't allocate the message, then just return, we
3219 get 4 retries, so this should be ok. */
882fe011 3220 return NULL;
1da177e4
LT		 3221
3222 memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3223 smi_msg->data_size = recv_msg->msg.data_len;
3224 smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
3225
1da177e4
LT		 3226#ifdef DEBUG_MSGING
3227 {
3228 int m;
3229 printk("Resend: ");
e8b33617 3230 for (m = 0; m < smi_msg->data_size; m++)
1da177e4
LT		 3231 printk(" %2.2x", smi_msg->data[m]);
3232 printk("\n");
3233 }
3234#endif
882fe011 3235 return smi_msg;
1da177e4
LT		 3236}
3237
393d2cc3
CM		 3238static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3239 struct list_head *timeouts, long timeout_period,
3240 int slot, unsigned long *flags)
3241{
3242 struct ipmi_recv_msg *msg;
3243
3244 if (!ent->inuse)
3245 return;
3246
3247 ent->timeout -= timeout_period;
3248 if (ent->timeout > 0)
3249 return;
3250
3251 if (ent->retries_left == 0) {
3252 /* The message has used all its retries. */
3253 ent->inuse = 0;
3254 msg = ent->recv_msg;
3255 list_add_tail(&msg->link, timeouts);
3256 spin_lock(&intf->counter_lock);
3257 if (ent->broadcast)
3258 intf->timed_out_ipmb_broadcasts++;
3259 else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3260 intf->timed_out_lan_commands++;
3261 else
3262 intf->timed_out_ipmb_commands++;
3263 spin_unlock(&intf->counter_lock);
3264 } else {
3265 struct ipmi_smi_msg *smi_msg;
3266 /* More retries, send again. */
3267
3268 /* Start with the max timer, set to normal
3269 timer after the message is sent. */
3270 ent->timeout = MAX_MSG_TIMEOUT;
3271 ent->retries_left--;
3272 spin_lock(&intf->counter_lock);
3273 if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3274 intf->retransmitted_lan_commands++;
3275 else
3276 intf->retransmitted_ipmb_commands++;
3277 spin_unlock(&intf->counter_lock);
3278
3279 smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3280 ent->seqid);
3281 if (! smi_msg)
3282 return;
3283
3284 spin_unlock_irqrestore(&intf->seq_lock, *flags);
3285 /* Send the new message. We send with a zero
3286 * priority. It timed out, I doubt time is
3287 * that critical now, and high priority
3288 * messages are really only for messages to the
3289 * local MC, which don't get resent. */
3290 intf->handlers->sender(intf->send_info,
3291 smi_msg, 0);
3292 spin_lock_irqsave(&intf->seq_lock, *flags);
3293 }
3294}
3295
3296static void ipmi_timeout_handler(long timeout_period)
1da177e4
LT		 3297{
3298 ipmi_smi_t intf;
3299 struct list_head timeouts;
3300 struct ipmi_recv_msg *msg, *msg2;
3301 struct ipmi_smi_msg *smi_msg, *smi_msg2;
3302 unsigned long flags;
3303 int i, j;
3304
3305 INIT_LIST_HEAD(&timeouts);
3306
3307 spin_lock(&interfaces_lock);
e8b33617 3308 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4 3309 intf = ipmi_interfaces[i];
393d2cc3 3310 if (IPMI_INVALID_INTERFACE(intf))
1da177e4 3311 continue;
393d2cc3
CM		 3312 kref_get(&intf->refcount);
3313 spin_unlock(&interfaces_lock);
1da177e4
LT		 3314
3315 /* See if any waiting messages need to be processed. */
393d2cc3
CM		 3316 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3317 list_for_each_entry_safe(smi_msg, smi_msg2, &intf->waiting_msgs, link) {
1da177e4
LT		 3318 if (! handle_new_recv_msg(intf, smi_msg)) {
3319 list_del(&smi_msg->link);
3320 ipmi_free_smi_msg(smi_msg);
3321 } else {
3322 /* To preserve message order, quit if we
3323 can't handle a message. */
3324 break;
3325 }
3326 }
393d2cc3 3327 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
1da177e4
LT		 3328
3329 /* Go through the seq table and find any messages that
3330 have timed out, putting them in the timeouts
3331 list. */
393d2cc3
CM		 3332 spin_lock_irqsave(&intf->seq_lock, flags);
3333 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++)
3334 check_msg_timeout(intf, &(intf->seq_table[j]),
3335 &timeouts, timeout_period, j,
3336 &flags);
3337 spin_unlock_irqrestore(&intf->seq_lock, flags);
3338
3339 list_for_each_entry_safe(msg, msg2, &timeouts, link)
1da177e4 3340 handle_msg_timeout(msg);
1da177e4 3341
393d2cc3
CM		 3342 kref_put(&intf->refcount, intf_free);
3343 spin_lock(&interfaces_lock);
1da177e4
LT		 3344 }
3345 spin_unlock(&interfaces_lock);
3346}
3347
3348static void ipmi_request_event(void)
3349{
3350 ipmi_smi_t intf;
3351 int i;
3352
3353 spin_lock(&interfaces_lock);
e8b33617 3354 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4 3355 intf = ipmi_interfaces[i];
393d2cc3 3356 if (IPMI_INVALID_INTERFACE(intf))
1da177e4
LT		 3357 continue;
3358
3359 intf->handlers->request_events(intf->send_info);
3360 }
3361 spin_unlock(&interfaces_lock);
3362}
3363
3364static struct timer_list ipmi_timer;
3365
3366/* Call every ~100 ms. */
3367#define IPMI_TIMEOUT_TIME 100
3368
3369/* How many jiffies does it take to get to the timeout time. */
3370#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
3371
3372/* Request events from the queue every second (this is the number of
3373 IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
3374 future, IPMI will add a way to know immediately if an event is in
3375 the queue and this silliness can go away. */
3376#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
3377
8f43f84f 3378static atomic_t stop_operation;
1da177e4
LT		 3379static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3380
3381static void ipmi_timeout(unsigned long data)
3382{
8f43f84f 3383 if (atomic_read(&stop_operation))
1da177e4 3384 return;
1da177e4
LT		 3385
3386 ticks_to_req_ev--;
3387 if (ticks_to_req_ev == 0) {
3388 ipmi_request_event();
3389 ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3390 }
3391
3392 ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
3393
8f43f84f 3394 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
1da177e4
LT		 3395}
3396
3397
3398static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
3399static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
3400
3401/* FIXME - convert these to slabs. */
3402static void free_smi_msg(struct ipmi_smi_msg *msg)
3403{
3404 atomic_dec(&smi_msg_inuse_count);
3405 kfree(msg);
3406}
3407
3408struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
3409{
3410 struct ipmi_smi_msg *rv;
3411 rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
3412 if (rv) {
3413 rv->done = free_smi_msg;
3414 rv->user_data = NULL;
3415 atomic_inc(&smi_msg_inuse_count);
3416 }
3417 return rv;
3418}
3419
3420static void free_recv_msg(struct ipmi_recv_msg *msg)
3421{
3422 atomic_dec(&recv_msg_inuse_count);
3423 kfree(msg);
3424}
3425
3426struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
3427{
3428 struct ipmi_recv_msg *rv;
3429
3430 rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
3431 if (rv) {
3432 rv->done = free_recv_msg;
3433 atomic_inc(&recv_msg_inuse_count);
3434 }
3435 return rv;
3436}
3437
393d2cc3
CM		 3438void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
3439{
3440 if (msg->user)
3441 kref_put(&msg->user->refcount, free_user);
3442 msg->done(msg);
3443}
3444
1da177e4
LT		 3445#ifdef CONFIG_IPMI_PANIC_EVENT
3446
3447static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
3448{
3449}
3450
3451static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
3452{
3453}
3454
3455#ifdef CONFIG_IPMI_PANIC_STRING
56a55ec6 3456static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4 3457{
56a55ec6
CM		 3458 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3459 && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
3460 && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
3461 && (msg->msg.data[0] == IPMI_CC_NO_ERROR))
1da177e4
LT		 3462 {
3463 /* A get event receiver command, save it. */
56a55ec6
CM		 3464 intf->event_receiver = msg->msg.data[1];
3465 intf->event_receiver_lun = msg->msg.data[2] & 0x3;
1da177e4
LT		 3466 }
3467}
3468
56a55ec6 3469static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4 3470{
56a55ec6
CM		 3471 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3472 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
3473 && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
3474 && (msg->msg.data[0] == IPMI_CC_NO_ERROR))
1da177e4
LT		 3475 {
3476 /* A get device id command, save if we are an event
3477 receiver or generator. */
56a55ec6
CM		 3478 intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
3479 intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
1da177e4
LT		 3480 }
3481}
3482#endif
3483
3484static void send_panic_events(char *str)
3485{
3486 struct kernel_ipmi_msg msg;
3487 ipmi_smi_t intf;
3488 unsigned char data[16];
3489 int i;
3490 struct ipmi_system_interface_addr *si;
3491 struct ipmi_addr addr;
3492 struct ipmi_smi_msg smi_msg;
3493 struct ipmi_recv_msg recv_msg;
3494
3495 si = (struct ipmi_system_interface_addr *) &addr;
3496 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3497 si->channel = IPMI_BMC_CHANNEL;
3498 si->lun = 0;
3499
3500 /* Fill in an event telling that we have failed. */
3501 msg.netfn = 0x04; /* Sensor or Event. */
3502 msg.cmd = 2; /* Platform event command. */
3503 msg.data = data;
3504 msg.data_len = 8;
cda315ab 3505 data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
1da177e4
LT		 3506 data[1] = 0x03; /* This is for IPMI 1.0. */
3507 data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
3508 data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
3509 data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
3510
3511 /* Put a few breadcrumbs in. Hopefully later we can add more things
3512 to make the panic events more useful. */
3513 if (str) {
3514 data[3] = str[0];
3515 data[6] = str[1];
3516 data[7] = str[2];
3517 }
3518
3519 smi_msg.done = dummy_smi_done_handler;
3520 recv_msg.done = dummy_recv_done_handler;
3521
3522 /* For every registered interface, send the event. */
e8b33617 3523 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4 3524 intf = ipmi_interfaces[i];
393d2cc3 3525 if (IPMI_INVALID_INTERFACE(intf))
1da177e4
LT		 3526 continue;
3527
3528 /* Send the event announcing the panic. */
3529 intf->handlers->set_run_to_completion(intf->send_info, 1);
3530 i_ipmi_request(NULL,
3531 intf,
3532 &addr,
3533 0,
3534 &msg,
56a55ec6 3535 intf,
1da177e4
LT		 3536 &smi_msg,
3537 &recv_msg,
3538 0,
c14979b9
CM		 3539 intf->channels[0].address,
3540 intf->channels[0].lun,
1da177e4
LT		 3541 0, 1); /* Don't retry, and don't wait. */
3542 }
3543
3544#ifdef CONFIG_IPMI_PANIC_STRING
3545 /* On every interface, dump a bunch of OEM event holding the
3546 string. */
3547 if (!str)
3548 return;
3549
e8b33617 3550 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4
LT		 3551 char *p = str;
3552 struct ipmi_ipmb_addr *ipmb;
3553 int j;
3554
3555 intf = ipmi_interfaces[i];
393d2cc3 3556 if (IPMI_INVALID_INTERFACE(intf))
1da177e4
LT		 3557 continue;
3558
3559 /* First job here is to figure out where to send the
3560 OEM events. There's no way in IPMI to send OEM
3561 events using an event send command, so we have to
3562 find the SEL to put them in and stick them in
3563 there. */
3564
3565 /* Get capabilities from the get device id. */
3566 intf->local_sel_device = 0;
3567 intf->local_event_generator = 0;
3568 intf->event_receiver = 0;
3569
3570 /* Request the device info from the local MC. */
3571 msg.netfn = IPMI_NETFN_APP_REQUEST;
3572 msg.cmd = IPMI_GET_DEVICE_ID_CMD;
3573 msg.data = NULL;
3574 msg.data_len = 0;
3575 intf->null_user_handler = device_id_fetcher;
3576 i_ipmi_request(NULL,
3577 intf,
3578 &addr,
3579 0,
3580 &msg,
56a55ec6 3581 intf,
1da177e4
LT		 3582 &smi_msg,
3583 &recv_msg,
3584 0,
c14979b9
CM		 3585 intf->channels[0].address,
3586 intf->channels[0].lun,
1da177e4
LT		 3587 0, 1); /* Don't retry, and don't wait. */
3588
3589 if (intf->local_event_generator) {
3590 /* Request the event receiver from the local MC. */
3591 msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
3592 msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
3593 msg.data = NULL;
3594 msg.data_len = 0;
3595 intf->null_user_handler = event_receiver_fetcher;
3596 i_ipmi_request(NULL,
3597 intf,
3598 &addr,
3599 0,
3600 &msg,
56a55ec6 3601 intf,
1da177e4
LT		 3602 &smi_msg,
3603 &recv_msg,
3604 0,
c14979b9
CM		 3605 intf->channels[0].address,
3606 intf->channels[0].lun,
1da177e4
LT		 3607 0, 1); /* no retry, and no wait. */
3608 }
3609 intf->null_user_handler = NULL;
3610
3611 /* Validate the event receiver. The low bit must not
3612 be 1 (it must be a valid IPMB address), it cannot
3613 be zero, and it must not be my address. */
3614 if (((intf->event_receiver & 1) == 0)
3615 && (intf->event_receiver != 0)
c14979b9 3616 && (intf->event_receiver != intf->channels[0].address))
1da177e4
LT		 3617 {
3618 /* The event receiver is valid, send an IPMB
3619 message. */
3620 ipmb = (struct ipmi_ipmb_addr *) &addr;
3621 ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
3622 ipmb->channel = 0; /* FIXME - is this right? */
3623 ipmb->lun = intf->event_receiver_lun;
3624 ipmb->slave_addr = intf->event_receiver;
3625 } else if (intf->local_sel_device) {
3626 /* The event receiver was not valid (or was
3627 me), but I am an SEL device, just dump it
3628 in my SEL. */
3629 si = (struct ipmi_system_interface_addr *) &addr;
3630 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3631 si->channel = IPMI_BMC_CHANNEL;
3632 si->lun = 0;
3633 } else
3634 continue; /* No where to send the event. */
3635
3636
3637 msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
3638 msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
3639 msg.data = data;
3640 msg.data_len = 16;
3641
3642 j = 0;
3643 while (*p) {
3644 int size = strlen(p);
3645
3646 if (size > 11)
3647 size = 11;
3648 data[0] = 0;
3649 data[1] = 0;
3650 data[2] = 0xf0; /* OEM event without timestamp. */
c14979b9 3651 data[3] = intf->channels[0].address;
1da177e4
LT		 3652 data[4] = j++; /* sequence # */
3653 /* Always give 11 bytes, so strncpy will fill
3654 it with zeroes for me. */
3655 strncpy(data+5, p, 11);
3656 p += size;
3657
3658 i_ipmi_request(NULL,
3659 intf,
3660 &addr,
3661 0,
3662 &msg,
56a55ec6 3663 intf,
1da177e4
LT		 3664 &smi_msg,
3665 &recv_msg,
3666 0,
c14979b9
CM		 3667 intf->channels[0].address,
3668 intf->channels[0].lun,
1da177e4
LT		 3669 0, 1); /* no retry, and no wait. */
3670 }
3671 }
3672#endif /* CONFIG_IPMI_PANIC_STRING */
3673}
3674#endif /* CONFIG_IPMI_PANIC_EVENT */
3675
3676static int has_paniced = 0;
3677
3678static int panic_event(struct notifier_block *this,
3679 unsigned long event,
3680 void *ptr)
3681{
3682 int i;
3683 ipmi_smi_t intf;
3684
3685 if (has_paniced)
3686 return NOTIFY_DONE;
3687 has_paniced = 1;
3688
3689 /* For every registered interface, set it to run to completion. */
e8b33617 3690 for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
1da177e4 3691 intf = ipmi_interfaces[i];
393d2cc3 3692 if (IPMI_INVALID_INTERFACE(intf))
1da177e4
LT		 3693 continue;
3694
3695 intf->handlers->set_run_to_completion(intf->send_info, 1);
3696 }
3697
3698#ifdef CONFIG_IPMI_PANIC_EVENT
3699 send_panic_events(ptr);
3700#endif
3701
3702 return NOTIFY_DONE;
3703}
3704
3705static struct notifier_block panic_block = {
3706 .notifier_call = panic_event,
3707 .next = NULL,
3708 .priority = 200 /* priority: INT_MAX >= x >= 0 */
3709};
3710
3711static int ipmi_init_msghandler(void)
3712{
3713 int i;
50c812b2 3714 int rv;
1da177e4
LT		 3715
3716 if (initialized)
3717 return 0;
3718
50c812b2
CM		 3719 rv = driver_register(&ipmidriver);
3720 if (rv) {
3721 printk(KERN_ERR PFX "Could not register IPMI driver\n");
3722 return rv;
3723 }
3724
1da177e4 3725 printk(KERN_INFO "ipmi message handler version "
1fdd75bd 3726 IPMI_DRIVER_VERSION "\n");
1da177e4 3727
393d2cc3 3728 for (i = 0; i < MAX_IPMI_INTERFACES; i++)
1da177e4 3729 ipmi_interfaces[i] = NULL;
1da177e4 3730
3b625943 3731#ifdef CONFIG_PROC_FS
1da177e4
LT		 3732 proc_ipmi_root = proc_mkdir("ipmi", NULL);
3733 if (!proc_ipmi_root) {
3734 printk(KERN_ERR PFX "Unable to create IPMI proc dir");
3735 return -ENOMEM;
3736 }
3737
3738 proc_ipmi_root->owner = THIS_MODULE;
3b625943 3739#endif /* CONFIG_PROC_FS */
1da177e4
LT		 3740
3741 init_timer(&ipmi_timer);
3742 ipmi_timer.data = 0;
3743 ipmi_timer.function = ipmi_timeout;
3744 ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES;
3745 add_timer(&ipmi_timer);
3746
e041c683 3747 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
1da177e4
LT		 3748
3749 initialized = 1;
3750
3751 return 0;
3752}
3753
3754static __init int ipmi_init_msghandler_mod(void)
3755{
3756 ipmi_init_msghandler();
3757 return 0;
3758}
3759
3760static __exit void cleanup_ipmi(void)
3761{
3762 int count;
3763
3764 if (!initialized)
3765 return;
3766
e041c683 3767 atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
1da177e4
LT		 3768
3769 /* This can't be called if any interfaces exist, so no worry about
3770 shutting down the interfaces. */
3771
3772 /* Tell the timer to stop, then wait for it to stop. This avoids
3773 problems with race conditions removing the timer here. */
8f43f84f
CM		 3774 atomic_inc(&stop_operation);
3775 del_timer_sync(&ipmi_timer);
1da177e4 3776
3b625943 3777#ifdef CONFIG_PROC_FS
1da177e4 3778 remove_proc_entry(proc_ipmi_root->name, &proc_root);
3b625943 3779#endif /* CONFIG_PROC_FS */
1da177e4 3780
50c812b2
CM		 3781 driver_unregister(&ipmidriver);
3782
1da177e4
LT		 3783 initialized = 0;
3784
3785 /* Check for buffer leaks. */
3786 count = atomic_read(&smi_msg_inuse_count);
3787 if (count != 0)
3788 printk(KERN_WARNING PFX "SMI message count %d at exit\n",
3789 count);
3790 count = atomic_read(&recv_msg_inuse_count);
3791 if (count != 0)
3792 printk(KERN_WARNING PFX "recv message count %d at exit\n",
3793 count);
3794}
3795module_exit(cleanup_ipmi);
3796
3797module_init(ipmi_init_msghandler_mod);
3798MODULE_LICENSE("GPL");
1fdd75bd
CM		 3799MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3800MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI interface.");
3801MODULE_VERSION(IPMI_DRIVER_VERSION);
1da177e4
LT		 3802
3803EXPORT_SYMBOL(ipmi_create_user);
3804EXPORT_SYMBOL(ipmi_destroy_user);
3805EXPORT_SYMBOL(ipmi_get_version);
3806EXPORT_SYMBOL(ipmi_request_settime);
3807EXPORT_SYMBOL(ipmi_request_supply_msgs);
3808EXPORT_SYMBOL(ipmi_register_smi);
3809EXPORT_SYMBOL(ipmi_unregister_smi);
3810EXPORT_SYMBOL(ipmi_register_for_cmd);
3811EXPORT_SYMBOL(ipmi_unregister_for_cmd);
3812EXPORT_SYMBOL(ipmi_smi_msg_received);
3813EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
3814EXPORT_SYMBOL(ipmi_alloc_smi_msg);
3815EXPORT_SYMBOL(ipmi_addr_length);
3816EXPORT_SYMBOL(ipmi_validate_addr);
3817EXPORT_SYMBOL(ipmi_set_gets_events);
3818EXPORT_SYMBOL(ipmi_smi_watcher_register);
3819EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
3820EXPORT_SYMBOL(ipmi_set_my_address);
3821EXPORT_SYMBOL(ipmi_get_my_address);
3822EXPORT_SYMBOL(ipmi_set_my_LUN);
3823EXPORT_SYMBOL(ipmi_get_my_LUN);
3824EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
3825EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
393d2cc3 3826EXPORT_SYMBOL(ipmi_free_recv_msg);
Linux 6.x block layer and io_uring tree(s)