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33
34#include <linux/module.h>
35#include <linux/errno.h>
36#include <asm/system.h>
37#include <linux/poll.h>
38#include <linux/spinlock.h>
39#include <linux/mutex.h>
40#include <linux/slab.h>
41#include <linux/ipmi.h>
42#include <linux/ipmi_smi.h>
43#include <linux/notifier.h>
44#include <linux/init.h>
45#include <linux/proc_fs.h>
46#include <linux/rcupdate.h>
47
48#define PFX "IPMI message handler: "
49
50#define IPMI_DRIVER_VERSION "39.2"
51
52static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
53static int ipmi_init_msghandler(void);
54
55static int initialized;
56
57#ifdef CONFIG_PROC_FS
58static struct proc_dir_entry *proc_ipmi_root;
59#endif
60
61
62#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
63
64#define MAX_EVENTS_IN_QUEUE 25
65
66
67
68
69
70#define MAX_MSG_TIMEOUT 60000
71
72
73
74
75struct ipmi_user {
76 struct list_head link;
77
78
79 int valid;
80
81 struct kref refcount;
82
83
84 struct ipmi_user_hndl *handler;
85 void *handler_data;
86
87
88 ipmi_smi_t intf;
89
90
91 int gets_events;
92};
93
94struct cmd_rcvr {
95 struct list_head link;
96
97 ipmi_user_t user;
98 unsigned char netfn;
99 unsigned char cmd;
100 unsigned int chans;
101
102
103
104
105
106
107
108
109
110 struct cmd_rcvr *next;
111};
112
113struct seq_table {
114 unsigned int inuse : 1;
115 unsigned int broadcast : 1;
116
117 unsigned long timeout;
118 unsigned long orig_timeout;
119 unsigned int retries_left;
120
121
122
123
124
125
126 long seqid;
127
128
129
130
131
132
133 struct ipmi_recv_msg *recv_msg;
134};
135
136
137
138
139
140#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
141
142#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
143 do { \
144 seq = ((msgid >> 26) & 0x3f); \
145 seqid = (msgid & 0x3fffff); \
146 } while (0)
147
148#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
149
150struct ipmi_channel {
151 unsigned char medium;
152 unsigned char protocol;
153
154
155
156
157
158 unsigned char address;
159
160
161
162
163
164 unsigned char lun;
165};
166
167#ifdef CONFIG_PROC_FS
168struct ipmi_proc_entry {
169 char *name;
170 struct ipmi_proc_entry *next;
171};
172#endif
173
174struct bmc_device {
175 struct platform_device *dev;
176 struct ipmi_device_id id;
177 unsigned char guid[16];
178 int guid_set;
179
180 struct kref refcount;
181
182
183 struct device_attribute device_id_attr;
184 struct device_attribute provides_dev_sdrs_attr;
185 struct device_attribute revision_attr;
186 struct device_attribute firmware_rev_attr;
187 struct device_attribute version_attr;
188 struct device_attribute add_dev_support_attr;
189 struct device_attribute manufacturer_id_attr;
190 struct device_attribute product_id_attr;
191 struct device_attribute guid_attr;
192 struct device_attribute aux_firmware_rev_attr;
193};
194
195
196
197
198
199enum ipmi_stat_indexes {
200
201 IPMI_STAT_sent_invalid_commands = 0,
202
203
204 IPMI_STAT_sent_local_commands,
205
206
207 IPMI_STAT_handled_local_responses,
208
209
210 IPMI_STAT_unhandled_local_responses,
211
212
213 IPMI_STAT_sent_ipmb_commands,
214
215
216 IPMI_STAT_sent_ipmb_command_errs,
217
218
219 IPMI_STAT_retransmitted_ipmb_commands,
220
221
222
223
224
225 IPMI_STAT_timed_out_ipmb_commands,
226
227
228
229
230
231
232 IPMI_STAT_timed_out_ipmb_broadcasts,
233
234
235 IPMI_STAT_sent_ipmb_responses,
236
237
238 IPMI_STAT_handled_ipmb_responses,
239
240
241 IPMI_STAT_invalid_ipmb_responses,
242
243
244 IPMI_STAT_unhandled_ipmb_responses,
245
246
247 IPMI_STAT_sent_lan_commands,
248
249
250 IPMI_STAT_sent_lan_command_errs,
251
252
253 IPMI_STAT_retransmitted_lan_commands,
254
255
256
257
258
259 IPMI_STAT_timed_out_lan_commands,
260
261
262 IPMI_STAT_sent_lan_responses,
263
264
265 IPMI_STAT_handled_lan_responses,
266
267
268 IPMI_STAT_invalid_lan_responses,
269
270
271 IPMI_STAT_unhandled_lan_responses,
272
273
274 IPMI_STAT_handled_commands,
275
276
277 IPMI_STAT_invalid_commands,
278
279
280 IPMI_STAT_unhandled_commands,
281
282
283 IPMI_STAT_invalid_events,
284
285
286 IPMI_STAT_events,
287
288
289
290 IPMI_NUM_STATS
291};
292
293
294#define IPMI_IPMB_NUM_SEQ 64
295#define IPMI_MAX_CHANNELS 16
296struct ipmi_smi {
297
298 int intf_num;
299
300 struct kref refcount;
301
302
303 struct list_head link;
304
305
306
307
308
309 struct list_head users;
310
311
312 unsigned char ipmi_version_major;
313 unsigned char ipmi_version_minor;
314
315
316 wait_queue_head_t waitq;
317
318 struct bmc_device *bmc;
319 char *my_dev_name;
320 char *sysfs_name;
321
322
323
324
325
326
327
328 struct ipmi_smi_handlers *handlers;
329 void *send_info;
330
331#ifdef CONFIG_PROC_FS
332
333 struct mutex proc_entry_lock;
334 struct ipmi_proc_entry *proc_entries;
335#endif
336
337
338 struct device *si_dev;
339
340
341
342
343
344
345
346 spinlock_t seq_lock;
347 struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
348 int curr_seq;
349
350
351
352
353
354
355 spinlock_t waiting_msgs_lock;
356 struct list_head waiting_msgs;
357
358
359
360
361
362 struct mutex cmd_rcvrs_mutex;
363 struct list_head cmd_rcvrs;
364
365
366
367
368
369 spinlock_t events_lock;
370 struct list_head waiting_events;
371 unsigned int waiting_events_count;
372 char delivering_events;
373 char event_msg_printed;
374
375
376
377
378
379 unsigned char event_receiver;
380 unsigned char event_receiver_lun;
381 unsigned char local_sel_device;
382 unsigned char local_event_generator;
383
384
385 int maintenance_mode;
386 int maintenance_mode_enable;
387 int auto_maintenance_timeout;
388 spinlock_t maintenance_mode_lock;
389
390
391
392
393
394
395
396 void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
397
398
399
400
401
402 int curr_channel;
403
404
405 struct ipmi_channel channels[IPMI_MAX_CHANNELS];
406
407
408 struct proc_dir_entry *proc_dir;
409 char proc_dir_name[10];
410
411 atomic_t stats[IPMI_NUM_STATS];
412
413
414
415
416
417
418 int run_to_completion;
419};
420#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
421
422
423
424
425static struct platform_driver ipmidriver = {
426 .driver = {
427 .name = "ipmi",
428 .bus = &platform_bus_type
429 }
430};
431static DEFINE_MUTEX(ipmidriver_mutex);
432
433static LIST_HEAD(ipmi_interfaces);
434static DEFINE_MUTEX(ipmi_interfaces_mutex);
435
436
437
438
439static LIST_HEAD(smi_watchers);
440static DEFINE_MUTEX(smi_watchers_mutex);
441
442
443#define ipmi_inc_stat(intf, stat) \
444 atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
445#define ipmi_get_stat(intf, stat) \
446 ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
447
448
449static void free_recv_msg_list(struct list_head *q)
450{
451 struct ipmi_recv_msg *msg, *msg2;
452
453 list_for_each_entry_safe(msg, msg2, q, link) {
454 list_del(&msg->link);
455 ipmi_free_recv_msg(msg);
456 }
457}
458
459static void free_smi_msg_list(struct list_head *q)
460{
461 struct ipmi_smi_msg *msg, *msg2;
462
463 list_for_each_entry_safe(msg, msg2, q, link) {
464 list_del(&msg->link);
465 ipmi_free_smi_msg(msg);
466 }
467}
468
469static void clean_up_interface_data(ipmi_smi_t intf)
470{
471 int i;
472 struct cmd_rcvr *rcvr, *rcvr2;
473 struct list_head list;
474
475 free_smi_msg_list(&intf->waiting_msgs);
476 free_recv_msg_list(&intf->waiting_events);
477
478
479
480
481
482 mutex_lock(&intf->cmd_rcvrs_mutex);
483 INIT_LIST_HEAD(&list);
484 list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
485 mutex_unlock(&intf->cmd_rcvrs_mutex);
486
487 list_for_each_entry_safe(rcvr, rcvr2, &list, link)
488 kfree(rcvr);
489
490 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
491 if ((intf->seq_table[i].inuse)
492 && (intf->seq_table[i].recv_msg))
493 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
494 }
495}
496
497static void intf_free(struct kref *ref)
498{
499 ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
500
501 clean_up_interface_data(intf);
502 kfree(intf);
503}
504
505struct watcher_entry {
506 int intf_num;
507 ipmi_smi_t intf;
508 struct list_head link;
509};
510
511int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
512{
513 ipmi_smi_t intf;
514 LIST_HEAD(to_deliver);
515 struct watcher_entry *e, *e2;
516
517 mutex_lock(&smi_watchers_mutex);
518
519 mutex_lock(&ipmi_interfaces_mutex);
520
521
522 list_for_each_entry(intf, &ipmi_interfaces, link) {
523 if (intf->intf_num == -1)
524 continue;
525 e = kmalloc(sizeof(*e), GFP_KERNEL);
526 if (!e)
527 goto out_err;
528 kref_get(&intf->refcount);
529 e->intf = intf;
530 e->intf_num = intf->intf_num;
531 list_add_tail(&e->link, &to_deliver);
532 }
533
534
535 list_add(&watcher->link, &smi_watchers);
536
537 mutex_unlock(&ipmi_interfaces_mutex);
538
539 list_for_each_entry_safe(e, e2, &to_deliver, link) {
540 list_del(&e->link);
541 watcher->new_smi(e->intf_num, e->intf->si_dev);
542 kref_put(&e->intf->refcount, intf_free);
543 kfree(e);
544 }
545
546 mutex_unlock(&smi_watchers_mutex);
547
548 return 0;
549
550 out_err:
551 mutex_unlock(&ipmi_interfaces_mutex);
552 mutex_unlock(&smi_watchers_mutex);
553 list_for_each_entry_safe(e, e2, &to_deliver, link) {
554 list_del(&e->link);
555 kref_put(&e->intf->refcount, intf_free);
556 kfree(e);
557 }
558 return -ENOMEM;
559}
560EXPORT_SYMBOL(ipmi_smi_watcher_register);
561
562int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
563{
564 mutex_lock(&smi_watchers_mutex);
565 list_del(&(watcher->link));
566 mutex_unlock(&smi_watchers_mutex);
567 return 0;
568}
569EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
570
571
572
573
574static void
575call_smi_watchers(int i, struct device *dev)
576{
577 struct ipmi_smi_watcher *w;
578
579 list_for_each_entry(w, &smi_watchers, link) {
580 if (try_module_get(w->owner)) {
581 w->new_smi(i, dev);
582 module_put(w->owner);
583 }
584 }
585}
586
587static int
588ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
589{
590 if (addr1->addr_type != addr2->addr_type)
591 return 0;
592
593 if (addr1->channel != addr2->channel)
594 return 0;
595
596 if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
597 struct ipmi_system_interface_addr *smi_addr1
598 = (struct ipmi_system_interface_addr *) addr1;
599 struct ipmi_system_interface_addr *smi_addr2
600 = (struct ipmi_system_interface_addr *) addr2;
601 return (smi_addr1->lun == smi_addr2->lun);
602 }
603
604 if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE)
605 || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
606 struct ipmi_ipmb_addr *ipmb_addr1
607 = (struct ipmi_ipmb_addr *) addr1;
608 struct ipmi_ipmb_addr *ipmb_addr2
609 = (struct ipmi_ipmb_addr *) addr2;
610
611 return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
612 && (ipmb_addr1->lun == ipmb_addr2->lun));
613 }
614
615 if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) {
616 struct ipmi_lan_addr *lan_addr1
617 = (struct ipmi_lan_addr *) addr1;
618 struct ipmi_lan_addr *lan_addr2
619 = (struct ipmi_lan_addr *) addr2;
620
621 return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
622 && (lan_addr1->local_SWID == lan_addr2->local_SWID)
623 && (lan_addr1->session_handle
624 == lan_addr2->session_handle)
625 && (lan_addr1->lun == lan_addr2->lun));
626 }
627
628 return 1;
629}
630
631int ipmi_validate_addr(struct ipmi_addr *addr, int len)
632{
633 if (len < sizeof(struct ipmi_system_interface_addr))
634 return -EINVAL;
635
636 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
637 if (addr->channel != IPMI_BMC_CHANNEL)
638 return -EINVAL;
639 return 0;
640 }
641
642 if ((addr->channel == IPMI_BMC_CHANNEL)
643 || (addr->channel >= IPMI_MAX_CHANNELS)
644 || (addr->channel < 0))
645 return -EINVAL;
646
647 if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
648 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
649 if (len < sizeof(struct ipmi_ipmb_addr))
650 return -EINVAL;
651 return 0;
652 }
653
654 if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
655 if (len < sizeof(struct ipmi_lan_addr))
656 return -EINVAL;
657 return 0;
658 }
659
660 return -EINVAL;
661}
662EXPORT_SYMBOL(ipmi_validate_addr);
663
664unsigned int ipmi_addr_length(int addr_type)
665{
666 if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
667 return sizeof(struct ipmi_system_interface_addr);
668
669 if ((addr_type == IPMI_IPMB_ADDR_TYPE)
670 || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
671 return sizeof(struct ipmi_ipmb_addr);
672
673 if (addr_type == IPMI_LAN_ADDR_TYPE)
674 return sizeof(struct ipmi_lan_addr);
675
676 return 0;
677}
678EXPORT_SYMBOL(ipmi_addr_length);
679
680static void deliver_response(struct ipmi_recv_msg *msg)
681{
682 if (!msg->user) {
683 ipmi_smi_t intf = msg->user_msg_data;
684
685
686 if (intf->null_user_handler) {
687 intf->null_user_handler(intf, msg);
688 ipmi_inc_stat(intf, handled_local_responses);
689 } else {
690
691 ipmi_inc_stat(intf, unhandled_local_responses);
692 }
693 ipmi_free_recv_msg(msg);
694 } else {
695 ipmi_user_t user = msg->user;
696 user->handler->ipmi_recv_hndl(msg, user->handler_data);
697 }
698}
699
700static void
701deliver_err_response(struct ipmi_recv_msg *msg, int err)
702{
703 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
704 msg->msg_data[0] = err;
705 msg->msg.netfn |= 1;
706 msg->msg.data_len = 1;
707 msg->msg.data = msg->msg_data;
708 deliver_response(msg);
709}
710
711
712
713
714
715
716static int intf_next_seq(ipmi_smi_t intf,
717 struct ipmi_recv_msg *recv_msg,
718 unsigned long timeout,
719 int retries,
720 int broadcast,
721 unsigned char *seq,
722 long *seqid)
723{
724 int rv = 0;
725 unsigned int i;
726
727 for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
728 i = (i+1)%IPMI_IPMB_NUM_SEQ) {
729 if (!intf->seq_table[i].inuse)
730 break;
731 }
732
733 if (!intf->seq_table[i].inuse) {
734 intf->seq_table[i].recv_msg = recv_msg;
735
736
737
738
739
740 intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
741 intf->seq_table[i].orig_timeout = timeout;
742 intf->seq_table[i].retries_left = retries;
743 intf->seq_table[i].broadcast = broadcast;
744 intf->seq_table[i].inuse = 1;
745 intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
746 *seq = i;
747 *seqid = intf->seq_table[i].seqid;
748 intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
749 } else {
750 rv = -EAGAIN;
751 }
752
753 return rv;
754}
755
756
757
758
759
760
761
762
763static int intf_find_seq(ipmi_smi_t intf,
764 unsigned char seq,
765 short channel,
766 unsigned char cmd,
767 unsigned char netfn,
768 struct ipmi_addr *addr,
769 struct ipmi_recv_msg **recv_msg)
770{
771 int rv = -ENODEV;
772 unsigned long flags;
773
774 if (seq >= IPMI_IPMB_NUM_SEQ)
775 return -EINVAL;
776
777 spin_lock_irqsave(&(intf->seq_lock), flags);
778 if (intf->seq_table[seq].inuse) {
779 struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
780
781 if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
782 && (msg->msg.netfn == netfn)
783 && (ipmi_addr_equal(addr, &(msg->addr)))) {
784 *recv_msg = msg;
785 intf->seq_table[seq].inuse = 0;
786 rv = 0;
787 }
788 }
789 spin_unlock_irqrestore(&(intf->seq_lock), flags);
790
791 return rv;
792}
793
794
795
796static int intf_start_seq_timer(ipmi_smi_t intf,
797 long msgid)
798{
799 int rv = -ENODEV;
800 unsigned long flags;
801 unsigned char seq;
802 unsigned long seqid;
803
804
805 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
806
807 spin_lock_irqsave(&(intf->seq_lock), flags);
808
809
810
811
812 if ((intf->seq_table[seq].inuse)
813 && (intf->seq_table[seq].seqid == seqid)) {
814 struct seq_table *ent = &(intf->seq_table[seq]);
815 ent->timeout = ent->orig_timeout;
816 rv = 0;
817 }
818 spin_unlock_irqrestore(&(intf->seq_lock), flags);
819
820 return rv;
821}
822
823
824static int intf_err_seq(ipmi_smi_t intf,
825 long msgid,
826 unsigned int err)
827{
828 int rv = -ENODEV;
829 unsigned long flags;
830 unsigned char seq;
831 unsigned long seqid;
832 struct ipmi_recv_msg *msg = NULL;
833
834
835 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
836
837 spin_lock_irqsave(&(intf->seq_lock), flags);
838
839
840
841
842 if ((intf->seq_table[seq].inuse)
843 && (intf->seq_table[seq].seqid == seqid)) {
844 struct seq_table *ent = &(intf->seq_table[seq]);
845
846 ent->inuse = 0;
847 msg = ent->recv_msg;
848 rv = 0;
849 }
850 spin_unlock_irqrestore(&(intf->seq_lock), flags);
851
852 if (msg)
853 deliver_err_response(msg, err);
854
855 return rv;
856}
857
858
859int ipmi_create_user(unsigned int if_num,
860 struct ipmi_user_hndl *handler,
861 void *handler_data,
862 ipmi_user_t *user)
863{
864 unsigned long flags;
865 ipmi_user_t new_user;
866 int rv = 0;
867 ipmi_smi_t intf;
868
869
870
871
872
873
874
875
876
877 if (handler == NULL)
878 return -EINVAL;
879
880
881
882
883
884 if (!initialized) {
885 rv = ipmi_init_msghandler();
886 if (rv)
887 return rv;
888
889
890
891
892
893 if (!initialized)
894 return -ENODEV;
895 }
896
897 new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
898 if (!new_user)
899 return -ENOMEM;
900
901 mutex_lock(&ipmi_interfaces_mutex);
902 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
903 if (intf->intf_num == if_num)
904 goto found;
905 }
906
907 rv = -EINVAL;
908 goto out_kfree;
909
910 found:
911
912 kref_get(&intf->refcount);
913
914 kref_init(&new_user->refcount);
915 new_user->handler = handler;
916 new_user->handler_data = handler_data;
917 new_user->intf = intf;
918 new_user->gets_events = 0;
919
920 if (!try_module_get(intf->handlers->owner)) {
921 rv = -ENODEV;
922 goto out_kref;
923 }
924
925 if (intf->handlers->inc_usecount) {
926 rv = intf->handlers->inc_usecount(intf->send_info);
927 if (rv) {
928 module_put(intf->handlers->owner);
929 goto out_kref;
930 }
931 }
932
933
934
935
936
937 mutex_unlock(&ipmi_interfaces_mutex);
938
939 new_user->valid = 1;
940 spin_lock_irqsave(&intf->seq_lock, flags);
941 list_add_rcu(&new_user->link, &intf->users);
942 spin_unlock_irqrestore(&intf->seq_lock, flags);
943 *user = new_user;
944 return 0;
945
946out_kref:
947 kref_put(&intf->refcount, intf_free);
948out_kfree:
949 mutex_unlock(&ipmi_interfaces_mutex);
950 kfree(new_user);
951 return rv;
952}
953EXPORT_SYMBOL(ipmi_create_user);
954
955static void free_user(struct kref *ref)
956{
957 ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
958 kfree(user);
959}
960
961int ipmi_destroy_user(ipmi_user_t user)
962{
963 ipmi_smi_t intf = user->intf;
964 int i;
965 unsigned long flags;
966 struct cmd_rcvr *rcvr;
967 struct cmd_rcvr *rcvrs = NULL;
968
969 user->valid = 0;
970
971
972 spin_lock_irqsave(&intf->seq_lock, flags);
973 list_del_rcu(&user->link);
974
975 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
976 if (intf->seq_table[i].inuse
977 && (intf->seq_table[i].recv_msg->user == user)) {
978 intf->seq_table[i].inuse = 0;
979 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
980 }
981 }
982 spin_unlock_irqrestore(&intf->seq_lock, flags);
983
984
985
986
987
988
989
990 mutex_lock(&intf->cmd_rcvrs_mutex);
991 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
992 if (rcvr->user == user) {
993 list_del_rcu(&rcvr->link);
994 rcvr->next = rcvrs;
995 rcvrs = rcvr;
996 }
997 }
998 mutex_unlock(&intf->cmd_rcvrs_mutex);
999 synchronize_rcu();
1000 while (rcvrs) {
1001 rcvr = rcvrs;
1002 rcvrs = rcvr->next;
1003 kfree(rcvr);
1004 }
1005
1006 mutex_lock(&ipmi_interfaces_mutex);
1007 if (intf->handlers) {
1008 module_put(intf->handlers->owner);
1009 if (intf->handlers->dec_usecount)
1010 intf->handlers->dec_usecount(intf->send_info);
1011 }
1012 mutex_unlock(&ipmi_interfaces_mutex);
1013
1014 kref_put(&intf->refcount, intf_free);
1015
1016 kref_put(&user->refcount, free_user);
1017
1018 return 0;
1019}
1020EXPORT_SYMBOL(ipmi_destroy_user);
1021
1022void ipmi_get_version(ipmi_user_t user,
1023 unsigned char *major,
1024 unsigned char *minor)
1025{
1026 *major = user->intf->ipmi_version_major;
1027 *minor = user->intf->ipmi_version_minor;
1028}
1029EXPORT_SYMBOL(ipmi_get_version);
1030
1031int ipmi_set_my_address(ipmi_user_t user,
1032 unsigned int channel,
1033 unsigned char address)
1034{
1035 if (channel >= IPMI_MAX_CHANNELS)
1036 return -EINVAL;
1037 user->intf->channels[channel].address = address;
1038 return 0;
1039}
1040EXPORT_SYMBOL(ipmi_set_my_address);
1041
1042int ipmi_get_my_address(ipmi_user_t user,
1043 unsigned int channel,
1044 unsigned char *address)
1045{
1046 if (channel >= IPMI_MAX_CHANNELS)
1047 return -EINVAL;
1048 *address = user->intf->channels[channel].address;
1049 return 0;
1050}
1051EXPORT_SYMBOL(ipmi_get_my_address);
1052
1053int ipmi_set_my_LUN(ipmi_user_t user,
1054 unsigned int channel,
1055 unsigned char LUN)
1056{
1057 if (channel >= IPMI_MAX_CHANNELS)
1058 return -EINVAL;
1059 user->intf->channels[channel].lun = LUN & 0x3;
1060 return 0;
1061}
1062EXPORT_SYMBOL(ipmi_set_my_LUN);
1063
1064int ipmi_get_my_LUN(ipmi_user_t user,
1065 unsigned int channel,
1066 unsigned char *address)
1067{
1068 if (channel >= IPMI_MAX_CHANNELS)
1069 return -EINVAL;
1070 *address = user->intf->channels[channel].lun;
1071 return 0;
1072}
1073EXPORT_SYMBOL(ipmi_get_my_LUN);
1074
1075int ipmi_get_maintenance_mode(ipmi_user_t user)
1076{
1077 int mode;
1078 unsigned long flags;
1079
1080 spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
1081 mode = user->intf->maintenance_mode;
1082 spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
1083
1084 return mode;
1085}
1086EXPORT_SYMBOL(ipmi_get_maintenance_mode);
1087
1088static void maintenance_mode_update(ipmi_smi_t intf)
1089{
1090 if (intf->handlers->set_maintenance_mode)
1091 intf->handlers->set_maintenance_mode(
1092 intf->send_info, intf->maintenance_mode_enable);
1093}
1094
1095int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
1096{
1097 int rv = 0;
1098 unsigned long flags;
1099 ipmi_smi_t intf = user->intf;
1100
1101 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1102 if (intf->maintenance_mode != mode) {
1103 switch (mode) {
1104 case IPMI_MAINTENANCE_MODE_AUTO:
1105 intf->maintenance_mode = mode;
1106 intf->maintenance_mode_enable
1107 = (intf->auto_maintenance_timeout > 0);
1108 break;
1109
1110 case IPMI_MAINTENANCE_MODE_OFF:
1111 intf->maintenance_mode = mode;
1112 intf->maintenance_mode_enable = 0;
1113 break;
1114
1115 case IPMI_MAINTENANCE_MODE_ON:
1116 intf->maintenance_mode = mode;
1117 intf->maintenance_mode_enable = 1;
1118 break;
1119
1120 default:
1121 rv = -EINVAL;
1122 goto out_unlock;
1123 }
1124
1125 maintenance_mode_update(intf);
1126 }
1127 out_unlock:
1128 spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
1129
1130 return rv;
1131}
1132EXPORT_SYMBOL(ipmi_set_maintenance_mode);
1133
1134int ipmi_set_gets_events(ipmi_user_t user, int val)
1135{
1136 unsigned long flags;
1137 ipmi_smi_t intf = user->intf;
1138 struct ipmi_recv_msg *msg, *msg2;
1139 struct list_head msgs;
1140
1141 INIT_LIST_HEAD(&msgs);
1142
1143 spin_lock_irqsave(&intf->events_lock, flags);
1144 user->gets_events = val;
1145
1146 if (intf->delivering_events)
1147
1148
1149
1150
1151 goto out;
1152
1153
1154 while (user->gets_events && !list_empty(&intf->waiting_events)) {
1155 list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
1156 list_move_tail(&msg->link, &msgs);
1157 intf->waiting_events_count = 0;
1158 if (intf->event_msg_printed) {
1159 printk(KERN_WARNING PFX "Event queue no longer"
1160 " full\n");
1161 intf->event_msg_printed = 0;
1162 }
1163
1164 intf->delivering_events = 1;
1165 spin_unlock_irqrestore(&intf->events_lock, flags);
1166
1167 list_for_each_entry_safe(msg, msg2, &msgs, link) {
1168 msg->user = user;
1169 kref_get(&user->refcount);
1170 deliver_response(msg);
1171 }
1172
1173 spin_lock_irqsave(&intf->events_lock, flags);
1174 intf->delivering_events = 0;
1175 }
1176
1177 out:
1178 spin_unlock_irqrestore(&intf->events_lock, flags);
1179
1180 return 0;
1181}
1182EXPORT_SYMBOL(ipmi_set_gets_events);
1183
1184static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
1185 unsigned char netfn,
1186 unsigned char cmd,
1187 unsigned char chan)
1188{
1189 struct cmd_rcvr *rcvr;
1190
1191 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1192 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1193 && (rcvr->chans & (1 << chan)))
1194 return rcvr;
1195 }
1196 return NULL;
1197}
1198
1199static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
1200 unsigned char netfn,
1201 unsigned char cmd,
1202 unsigned int chans)
1203{
1204 struct cmd_rcvr *rcvr;
1205
1206 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1207 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1208 && (rcvr->chans & chans))
1209 return 0;
1210 }
1211 return 1;
1212}
1213
1214int ipmi_register_for_cmd(ipmi_user_t user,
1215 unsigned char netfn,
1216 unsigned char cmd,
1217 unsigned int chans)
1218{
1219 ipmi_smi_t intf = user->intf;
1220 struct cmd_rcvr *rcvr;
1221 int rv = 0;
1222
1223
1224 rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
1225 if (!rcvr)
1226 return -ENOMEM;
1227 rcvr->cmd = cmd;
1228 rcvr->netfn = netfn;
1229 rcvr->chans = chans;
1230 rcvr->user = user;
1231
1232 mutex_lock(&intf->cmd_rcvrs_mutex);
1233
1234 if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
1235 rv = -EBUSY;
1236 goto out_unlock;
1237 }
1238
1239 list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1240
1241 out_unlock:
1242 mutex_unlock(&intf->cmd_rcvrs_mutex);
1243 if (rv)
1244 kfree(rcvr);
1245
1246 return rv;
1247}
1248EXPORT_SYMBOL(ipmi_register_for_cmd);
1249
1250int ipmi_unregister_for_cmd(ipmi_user_t user,
1251 unsigned char netfn,
1252 unsigned char cmd,
1253 unsigned int chans)
1254{
1255 ipmi_smi_t intf = user->intf;
1256 struct cmd_rcvr *rcvr;
1257 struct cmd_rcvr *rcvrs = NULL;
1258 int i, rv = -ENOENT;
1259
1260 mutex_lock(&intf->cmd_rcvrs_mutex);
1261 for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
1262 if (((1 << i) & chans) == 0)
1263 continue;
1264 rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
1265 if (rcvr == NULL)
1266 continue;
1267 if (rcvr->user == user) {
1268 rv = 0;
1269 rcvr->chans &= ~chans;
1270 if (rcvr->chans == 0) {
1271 list_del_rcu(&rcvr->link);
1272 rcvr->next = rcvrs;
1273 rcvrs = rcvr;
1274 }
1275 }
1276 }
1277 mutex_unlock(&intf->cmd_rcvrs_mutex);
1278 synchronize_rcu();
1279 while (rcvrs) {
1280 rcvr = rcvrs;
1281 rcvrs = rcvr->next;
1282 kfree(rcvr);
1283 }
1284 return rv;
1285}
1286EXPORT_SYMBOL(ipmi_unregister_for_cmd);
1287
1288static unsigned char
1289ipmb_checksum(unsigned char *data, int size)
1290{
1291 unsigned char csum = 0;
1292
1293 for (; size > 0; size--, data++)
1294 csum += *data;
1295
1296 return -csum;
1297}
1298
1299static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1300 struct kernel_ipmi_msg *msg,
1301 struct ipmi_ipmb_addr *ipmb_addr,
1302 long msgid,
1303 unsigned char ipmb_seq,
1304 int broadcast,
1305 unsigned char source_address,
1306 unsigned char source_lun)
1307{
1308 int i = broadcast;
1309
1310
1311 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1312 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1313 smi_msg->data[2] = ipmb_addr->channel;
1314 if (broadcast)
1315 smi_msg->data[3] = 0;
1316 smi_msg->data[i+3] = ipmb_addr->slave_addr;
1317 smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1318 smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1319 smi_msg->data[i+6] = source_address;
1320 smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1321 smi_msg->data[i+8] = msg->cmd;
1322
1323
1324 if (msg->data_len > 0)
1325 memcpy(&(smi_msg->data[i+9]), msg->data,
1326 msg->data_len);
1327 smi_msg->data_size = msg->data_len + 9;
1328
1329
1330 smi_msg->data[i+smi_msg->data_size]
1331 = ipmb_checksum(&(smi_msg->data[i+6]),
1332 smi_msg->data_size-6);
1333
1334
1335
1336
1337
1338 smi_msg->data_size += 1 + i;
1339
1340 smi_msg->msgid = msgid;
1341}
1342
1343static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1344 struct kernel_ipmi_msg *msg,
1345 struct ipmi_lan_addr *lan_addr,
1346 long msgid,
1347 unsigned char ipmb_seq,
1348 unsigned char source_lun)
1349{
1350
1351 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1352 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1353 smi_msg->data[2] = lan_addr->channel;
1354 smi_msg->data[3] = lan_addr->session_handle;
1355 smi_msg->data[4] = lan_addr->remote_SWID;
1356 smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1357 smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1358 smi_msg->data[7] = lan_addr->local_SWID;
1359 smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1360 smi_msg->data[9] = msg->cmd;
1361
1362
1363 if (msg->data_len > 0)
1364 memcpy(&(smi_msg->data[10]), msg->data,
1365 msg->data_len);
1366 smi_msg->data_size = msg->data_len + 10;
1367
1368
1369 smi_msg->data[smi_msg->data_size]
1370 = ipmb_checksum(&(smi_msg->data[7]),
1371 smi_msg->data_size-7);
1372
1373
1374
1375
1376
1377 smi_msg->data_size += 1;
1378
1379 smi_msg->msgid = msgid;
1380}
1381
1382
1383
1384
1385
1386
1387
1388static int i_ipmi_request(ipmi_user_t user,
1389 ipmi_smi_t intf,
1390 struct ipmi_addr *addr,
1391 long msgid,
1392 struct kernel_ipmi_msg *msg,
1393 void *user_msg_data,
1394 void *supplied_smi,
1395 struct ipmi_recv_msg *supplied_recv,
1396 int priority,
1397 unsigned char source_address,
1398 unsigned char source_lun,
1399 int retries,
1400 unsigned int retry_time_ms)
1401{
1402 int rv = 0;
1403 struct ipmi_smi_msg *smi_msg;
1404 struct ipmi_recv_msg *recv_msg;
1405 unsigned long flags;
1406 struct ipmi_smi_handlers *handlers;
1407
1408
1409 if (supplied_recv)
1410 recv_msg = supplied_recv;
1411 else {
1412 recv_msg = ipmi_alloc_recv_msg();
1413 if (recv_msg == NULL)
1414 return -ENOMEM;
1415 }
1416 recv_msg->user_msg_data = user_msg_data;
1417
1418 if (supplied_smi)
1419 smi_msg = (struct ipmi_smi_msg *) supplied_smi;
1420 else {
1421 smi_msg = ipmi_alloc_smi_msg();
1422 if (smi_msg == NULL) {
1423 ipmi_free_recv_msg(recv_msg);
1424 return -ENOMEM;
1425 }
1426 }
1427
1428 rcu_read_lock();
1429 handlers = intf->handlers;
1430 if (!handlers) {
1431 rv = -ENODEV;
1432 goto out_err;
1433 }
1434
1435 recv_msg->user = user;
1436 if (user)
1437 kref_get(&user->refcount);
1438 recv_msg->msgid = msgid;
1439
1440
1441
1442
1443 recv_msg->msg = *msg;
1444
1445 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1446 struct ipmi_system_interface_addr *smi_addr;
1447
1448 if (msg->netfn & 1) {
1449
1450 rv = -EINVAL;
1451 goto out_err;
1452 }
1453
1454 smi_addr = (struct ipmi_system_interface_addr *) addr;
1455 if (smi_addr->lun > 3) {
1456 ipmi_inc_stat(intf, sent_invalid_commands);
1457 rv = -EINVAL;
1458 goto out_err;
1459 }
1460
1461 memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1462
1463 if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1464 && ((msg->cmd == IPMI_SEND_MSG_CMD)
1465 || (msg->cmd == IPMI_GET_MSG_CMD)
1466 || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
1467
1468
1469
1470
1471 ipmi_inc_stat(intf, sent_invalid_commands);
1472 rv = -EINVAL;
1473 goto out_err;
1474 }
1475
1476 if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
1477 && ((msg->cmd == IPMI_COLD_RESET_CMD)
1478 || (msg->cmd == IPMI_WARM_RESET_CMD)))
1479 || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
1480 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1481 intf->auto_maintenance_timeout
1482 = IPMI_MAINTENANCE_MODE_TIMEOUT;
1483 if (!intf->maintenance_mode
1484 && !intf->maintenance_mode_enable) {
1485 intf->maintenance_mode_enable = 1;
1486 maintenance_mode_update(intf);
1487 }
1488 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
1489 flags);
1490 }
1491
1492 if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
1493 ipmi_inc_stat(intf, sent_invalid_commands);
1494 rv = -EMSGSIZE;
1495 goto out_err;
1496 }
1497
1498 smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1499 smi_msg->data[1] = msg->cmd;
1500 smi_msg->msgid = msgid;
1501 smi_msg->user_data = recv_msg;
1502 if (msg->data_len > 0)
1503 memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1504 smi_msg->data_size = msg->data_len + 2;
1505 ipmi_inc_stat(intf, sent_local_commands);
1506 } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
1507 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
1508 struct ipmi_ipmb_addr *ipmb_addr;
1509 unsigned char ipmb_seq;
1510 long seqid;
1511 int broadcast = 0;
1512
1513 if (addr->channel >= IPMI_MAX_CHANNELS) {
1514 ipmi_inc_stat(intf, sent_invalid_commands);
1515 rv = -EINVAL;
1516 goto out_err;
1517 }
1518
1519 if (intf->channels[addr->channel].medium
1520 != IPMI_CHANNEL_MEDIUM_IPMB) {
1521 ipmi_inc_stat(intf, sent_invalid_commands);
1522 rv = -EINVAL;
1523 goto out_err;
1524 }
1525
1526 if (retries < 0) {
1527 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1528 retries = 0;
1529 else
1530 retries = 4;
1531 }
1532 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
1533
1534
1535
1536
1537
1538 addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1539 broadcast = 1;
1540 }
1541
1542
1543
1544 if (retry_time_ms == 0)
1545 retry_time_ms = 1000;
1546
1547
1548
1549
1550
1551 if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
1552 ipmi_inc_stat(intf, sent_invalid_commands);
1553 rv = -EMSGSIZE;
1554 goto out_err;
1555 }
1556
1557 ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1558 if (ipmb_addr->lun > 3) {
1559 ipmi_inc_stat(intf, sent_invalid_commands);
1560 rv = -EINVAL;
1561 goto out_err;
1562 }
1563
1564 memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1565
1566 if (recv_msg->msg.netfn & 0x1) {
1567
1568
1569
1570
1571 ipmi_inc_stat(intf, sent_ipmb_responses);
1572 format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1573 msgid, broadcast,
1574 source_address, source_lun);
1575
1576
1577
1578
1579
1580 smi_msg->user_data = recv_msg;
1581 } else {
1582
1583
1584 spin_lock_irqsave(&(intf->seq_lock), flags);
1585
1586 ipmi_inc_stat(intf, sent_ipmb_commands);
1587
1588
1589
1590
1591
1592 rv = intf_next_seq(intf,
1593 recv_msg,
1594 retry_time_ms,
1595 retries,
1596 broadcast,
1597 &ipmb_seq,
1598 &seqid);
1599 if (rv) {
1600
1601
1602
1603
1604 spin_unlock_irqrestore(&(intf->seq_lock),
1605 flags);
1606 goto out_err;
1607 }
1608
1609
1610
1611
1612
1613
1614 format_ipmb_msg(smi_msg, msg, ipmb_addr,
1615 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1616 ipmb_seq, broadcast,
1617 source_address, source_lun);
1618
1619
1620
1621
1622
1623 memcpy(recv_msg->msg_data, smi_msg->data,
1624 smi_msg->data_size);
1625 recv_msg->msg.data = recv_msg->msg_data;
1626 recv_msg->msg.data_len = smi_msg->data_size;
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1637 }
1638 } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
1639 struct ipmi_lan_addr *lan_addr;
1640 unsigned char ipmb_seq;
1641 long seqid;
1642
1643 if (addr->channel >= IPMI_MAX_CHANNELS) {
1644 ipmi_inc_stat(intf, sent_invalid_commands);
1645 rv = -EINVAL;
1646 goto out_err;
1647 }
1648
1649 if ((intf->channels[addr->channel].medium
1650 != IPMI_CHANNEL_MEDIUM_8023LAN)
1651 && (intf->channels[addr->channel].medium
1652 != IPMI_CHANNEL_MEDIUM_ASYNC)) {
1653 ipmi_inc_stat(intf, sent_invalid_commands);
1654 rv = -EINVAL;
1655 goto out_err;
1656 }
1657
1658 retries = 4;
1659
1660
1661 if (retry_time_ms == 0)
1662 retry_time_ms = 1000;
1663
1664
1665 if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
1666 ipmi_inc_stat(intf, sent_invalid_commands);
1667 rv = -EMSGSIZE;
1668 goto out_err;
1669 }
1670
1671 lan_addr = (struct ipmi_lan_addr *) addr;
1672 if (lan_addr->lun > 3) {
1673 ipmi_inc_stat(intf, sent_invalid_commands);
1674 rv = -EINVAL;
1675 goto out_err;
1676 }
1677
1678 memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1679
1680 if (recv_msg->msg.netfn & 0x1) {
1681
1682
1683
1684
1685 ipmi_inc_stat(intf, sent_lan_responses);
1686 format_lan_msg(smi_msg, msg, lan_addr, msgid,
1687 msgid, source_lun);
1688
1689
1690
1691
1692
1693 smi_msg->user_data = recv_msg;
1694 } else {
1695
1696
1697 spin_lock_irqsave(&(intf->seq_lock), flags);
1698
1699 ipmi_inc_stat(intf, sent_lan_commands);
1700
1701
1702
1703
1704
1705 rv = intf_next_seq(intf,
1706 recv_msg,
1707 retry_time_ms,
1708 retries,
1709 0,
1710 &ipmb_seq,
1711 &seqid);
1712 if (rv) {
1713
1714
1715
1716
1717 spin_unlock_irqrestore(&(intf->seq_lock),
1718 flags);
1719 goto out_err;
1720 }
1721
1722
1723
1724
1725
1726
1727 format_lan_msg(smi_msg, msg, lan_addr,
1728 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1729 ipmb_seq, source_lun);
1730
1731
1732
1733
1734
1735 memcpy(recv_msg->msg_data, smi_msg->data,
1736 smi_msg->data_size);
1737 recv_msg->msg.data = recv_msg->msg_data;
1738 recv_msg->msg.data_len = smi_msg->data_size;
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1749 }
1750 } else {
1751
1752 ipmi_inc_stat(intf, sent_invalid_commands);
1753 rv = -EINVAL;
1754 goto out_err;
1755 }
1756
1757#ifdef DEBUG_MSGING
1758 {
1759 int m;
1760 for (m = 0; m < smi_msg->data_size; m++)
1761 printk(" %2.2x", smi_msg->data[m]);
1762 printk("\n");
1763 }
1764#endif
1765
1766 handlers->sender(intf->send_info, smi_msg, priority);
1767 rcu_read_unlock();
1768
1769 return 0;
1770
1771 out_err:
1772 rcu_read_unlock();
1773 ipmi_free_smi_msg(smi_msg);
1774 ipmi_free_recv_msg(recv_msg);
1775 return rv;
1776}
1777
1778static int check_addr(ipmi_smi_t intf,
1779 struct ipmi_addr *addr,
1780 unsigned char *saddr,
1781 unsigned char *lun)
1782{
1783 if (addr->channel >= IPMI_MAX_CHANNELS)
1784 return -EINVAL;
1785 *lun = intf->channels[addr->channel].lun;
1786 *saddr = intf->channels[addr->channel].address;
1787 return 0;
1788}
1789
1790int ipmi_request_settime(ipmi_user_t user,
1791 struct ipmi_addr *addr,
1792 long msgid,
1793 struct kernel_ipmi_msg *msg,
1794 void *user_msg_data,
1795 int priority,
1796 int retries,
1797 unsigned int retry_time_ms)
1798{
1799 unsigned char saddr, lun;
1800 int rv;
1801
1802 if (!user)
1803 return -EINVAL;
1804 rv = check_addr(user->intf, addr, &saddr, &lun);
1805 if (rv)
1806 return rv;
1807 return i_ipmi_request(user,
1808 user->intf,
1809 addr,
1810 msgid,
1811 msg,
1812 user_msg_data,
1813 NULL, NULL,
1814 priority,
1815 saddr,
1816 lun,
1817 retries,
1818 retry_time_ms);
1819}
1820EXPORT_SYMBOL(ipmi_request_settime);
1821
1822int ipmi_request_supply_msgs(ipmi_user_t user,
1823 struct ipmi_addr *addr,
1824 long msgid,
1825 struct kernel_ipmi_msg *msg,
1826 void *user_msg_data,
1827 void *supplied_smi,
1828 struct ipmi_recv_msg *supplied_recv,
1829 int priority)
1830{
1831 unsigned char saddr, lun;
1832 int rv;
1833
1834 if (!user)
1835 return -EINVAL;
1836 rv = check_addr(user->intf, addr, &saddr, &lun);
1837 if (rv)
1838 return rv;
1839 return i_ipmi_request(user,
1840 user->intf,
1841 addr,
1842 msgid,
1843 msg,
1844 user_msg_data,
1845 supplied_smi,
1846 supplied_recv,
1847 priority,
1848 saddr,
1849 lun,
1850 -1, 0);
1851}
1852EXPORT_SYMBOL(ipmi_request_supply_msgs);
1853
1854#ifdef CONFIG_PROC_FS
1855static int ipmb_file_read_proc(char *page, char **start, off_t off,
1856 int count, int *eof, void *data)
1857{
1858 char *out = (char *) page;
1859 ipmi_smi_t intf = data;
1860 int i;
1861 int rv = 0;
1862
1863 for (i = 0; i < IPMI_MAX_CHANNELS; i++)
1864 rv += sprintf(out+rv, "%x ", intf->channels[i].address);
1865 out[rv-1] = '\n';
1866 out[rv] = '\0';
1867 rv++;
1868 return rv;
1869}
1870
1871static int version_file_read_proc(char *page, char **start, off_t off,
1872 int count, int *eof, void *data)
1873{
1874 char *out = (char *) page;
1875 ipmi_smi_t intf = data;
1876
1877 return sprintf(out, "%u.%u\n",
1878 ipmi_version_major(&intf->bmc->id),
1879 ipmi_version_minor(&intf->bmc->id));
1880}
1881
1882static int stat_file_read_proc(char *page, char **start, off_t off,
1883 int count, int *eof, void *data)
1884{
1885 char *out = (char *) page;
1886 ipmi_smi_t intf = data;
1887
1888 out += sprintf(out, "sent_invalid_commands: %u\n",
1889 ipmi_get_stat(intf, sent_invalid_commands));
1890 out += sprintf(out, "sent_local_commands: %u\n",
1891 ipmi_get_stat(intf, sent_local_commands));
1892 out += sprintf(out, "handled_local_responses: %u\n",
1893 ipmi_get_stat(intf, handled_local_responses));
1894 out += sprintf(out, "unhandled_local_responses: %u\n",
1895 ipmi_get_stat(intf, unhandled_local_responses));
1896 out += sprintf(out, "sent_ipmb_commands: %u\n",
1897 ipmi_get_stat(intf, sent_ipmb_commands));
1898 out += sprintf(out, "sent_ipmb_command_errs: %u\n",
1899 ipmi_get_stat(intf, sent_ipmb_command_errs));
1900 out += sprintf(out, "retransmitted_ipmb_commands: %u\n",
1901 ipmi_get_stat(intf, retransmitted_ipmb_commands));
1902 out += sprintf(out, "timed_out_ipmb_commands: %u\n",
1903 ipmi_get_stat(intf, timed_out_ipmb_commands));
1904 out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n",
1905 ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
1906 out += sprintf(out, "sent_ipmb_responses: %u\n",
1907 ipmi_get_stat(intf, sent_ipmb_responses));
1908 out += sprintf(out, "handled_ipmb_responses: %u\n",
1909 ipmi_get_stat(intf, handled_ipmb_responses));
1910 out += sprintf(out, "invalid_ipmb_responses: %u\n",
1911 ipmi_get_stat(intf, invalid_ipmb_responses));
1912 out += sprintf(out, "unhandled_ipmb_responses: %u\n",
1913 ipmi_get_stat(intf, unhandled_ipmb_responses));
1914 out += sprintf(out, "sent_lan_commands: %u\n",
1915 ipmi_get_stat(intf, sent_lan_commands));
1916 out += sprintf(out, "sent_lan_command_errs: %u\n",
1917 ipmi_get_stat(intf, sent_lan_command_errs));
1918 out += sprintf(out, "retransmitted_lan_commands: %u\n",
1919 ipmi_get_stat(intf, retransmitted_lan_commands));
1920 out += sprintf(out, "timed_out_lan_commands: %u\n",
1921 ipmi_get_stat(intf, timed_out_lan_commands));
1922 out += sprintf(out, "sent_lan_responses: %u\n",
1923 ipmi_get_stat(intf, sent_lan_responses));
1924 out += sprintf(out, "handled_lan_responses: %u\n",
1925 ipmi_get_stat(intf, handled_lan_responses));
1926 out += sprintf(out, "invalid_lan_responses: %u\n",
1927 ipmi_get_stat(intf, invalid_lan_responses));
1928 out += sprintf(out, "unhandled_lan_responses: %u\n",
1929 ipmi_get_stat(intf, unhandled_lan_responses));
1930 out += sprintf(out, "handled_commands: %u\n",
1931 ipmi_get_stat(intf, handled_commands));
1932 out += sprintf(out, "invalid_commands: %u\n",
1933 ipmi_get_stat(intf, invalid_commands));
1934 out += sprintf(out, "unhandled_commands: %u\n",
1935 ipmi_get_stat(intf, unhandled_commands));
1936 out += sprintf(out, "invalid_events: %u\n",
1937 ipmi_get_stat(intf, invalid_events));
1938 out += sprintf(out, "events: %u\n",
1939 ipmi_get_stat(intf, events));
1940
1941 return (out - ((char *) page));
1942}
1943#endif
1944
1945int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
1946 read_proc_t *read_proc,
1947 void *data, struct module *owner)
1948{
1949 int rv = 0;
1950#ifdef CONFIG_PROC_FS
1951 struct proc_dir_entry *file;
1952 struct ipmi_proc_entry *entry;
1953
1954
1955 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1956 if (!entry)
1957 return -ENOMEM;
1958 entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
1959 if (!entry->name) {
1960 kfree(entry);
1961 return -ENOMEM;
1962 }
1963 strcpy(entry->name, name);
1964
1965 file = create_proc_entry(name, 0, smi->proc_dir);
1966 if (!file) {
1967 kfree(entry->name);
1968 kfree(entry);
1969 rv = -ENOMEM;
1970 } else {
1971 file->data = data;
1972 file->read_proc = read_proc;
1973 file->owner = owner;
1974
1975 mutex_lock(&smi->proc_entry_lock);
1976
1977 entry->next = smi->proc_entries;
1978 smi->proc_entries = entry;
1979 mutex_unlock(&smi->proc_entry_lock);
1980 }
1981#endif
1982
1983 return rv;
1984}
1985EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
1986
1987static int add_proc_entries(ipmi_smi_t smi, int num)
1988{
1989 int rv = 0;
1990
1991#ifdef CONFIG_PROC_FS
1992 sprintf(smi->proc_dir_name, "%d", num);
1993 smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
1994 if (!smi->proc_dir)
1995 rv = -ENOMEM;
1996 else
1997 smi->proc_dir->owner = THIS_MODULE;
1998
1999 if (rv == 0)
2000 rv = ipmi_smi_add_proc_entry(smi, "stats",
2001 stat_file_read_proc,
2002 smi, THIS_MODULE);
2003
2004 if (rv == 0)
2005 rv = ipmi_smi_add_proc_entry(smi, "ipmb",
2006 ipmb_file_read_proc,
2007 smi, THIS_MODULE);
2008
2009 if (rv == 0)
2010 rv = ipmi_smi_add_proc_entry(smi, "version",
2011 version_file_read_proc,
2012 smi, THIS_MODULE);
2013#endif
2014
2015 return rv;
2016}
2017
2018static void remove_proc_entries(ipmi_smi_t smi)
2019{
2020#ifdef CONFIG_PROC_FS
2021 struct ipmi_proc_entry *entry;
2022
2023 mutex_lock(&smi->proc_entry_lock);
2024 while (smi->proc_entries) {
2025 entry = smi->proc_entries;
2026 smi->proc_entries = entry->next;
2027
2028 remove_proc_entry(entry->name, smi->proc_dir);
2029 kfree(entry->name);
2030 kfree(entry);
2031 }
2032 mutex_unlock(&smi->proc_entry_lock);
2033 remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
2034#endif
2035}
2036
2037static int __find_bmc_guid(struct device *dev, void *data)
2038{
2039 unsigned char *id = data;
2040 struct bmc_device *bmc = dev_get_drvdata(dev);
2041 return memcmp(bmc->guid, id, 16) == 0;
2042}
2043
2044static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
2045 unsigned char *guid)
2046{
2047 struct device *dev;
2048
2049 dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
2050 if (dev)
2051 return dev_get_drvdata(dev);
2052 else
2053 return NULL;
2054}
2055
2056struct prod_dev_id {
2057 unsigned int product_id;
2058 unsigned char device_id;
2059};
2060
2061static int __find_bmc_prod_dev_id(struct device *dev, void *data)
2062{
2063 struct prod_dev_id *id = data;
2064 struct bmc_device *bmc = dev_get_drvdata(dev);
2065
2066 return (bmc->id.product_id == id->product_id
2067 && bmc->id.device_id == id->device_id);
2068}
2069
2070static struct bmc_device *ipmi_find_bmc_prod_dev_id(
2071 struct device_driver *drv,
2072 unsigned int product_id, unsigned char device_id)
2073{
2074 struct prod_dev_id id = {
2075 .product_id = product_id,
2076 .device_id = device_id,
2077 };
2078 struct device *dev;
2079
2080 dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
2081 if (dev)
2082 return dev_get_drvdata(dev);
2083 else
2084 return NULL;
2085}
2086
2087static ssize_t device_id_show(struct device *dev,
2088 struct device_attribute *attr,
2089 char *buf)
2090{
2091 struct bmc_device *bmc = dev_get_drvdata(dev);
2092
2093 return snprintf(buf, 10, "%u\n", bmc->id.device_id);
2094}
2095
2096static ssize_t provides_dev_sdrs_show(struct device *dev,
2097 struct device_attribute *attr,
2098 char *buf)
2099{
2100 struct bmc_device *bmc = dev_get_drvdata(dev);
2101
2102 return snprintf(buf, 10, "%u\n",
2103 (bmc->id.device_revision & 0x80) >> 7);
2104}
2105
2106static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
2107 char *buf)
2108{
2109 struct bmc_device *bmc = dev_get_drvdata(dev);
2110
2111 return snprintf(buf, 20, "%u\n",
2112 bmc->id.device_revision & 0x0F);
2113}
2114
2115static ssize_t firmware_rev_show(struct device *dev,
2116 struct device_attribute *attr,
2117 char *buf)
2118{
2119 struct bmc_device *bmc = dev_get_drvdata(dev);
2120
2121 return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
2122 bmc->id.firmware_revision_2);
2123}
2124
2125static ssize_t ipmi_version_show(struct device *dev,
2126 struct device_attribute *attr,
2127 char *buf)
2128{
2129 struct bmc_device *bmc = dev_get_drvdata(dev);
2130
2131 return snprintf(buf, 20, "%u.%u\n",
2132 ipmi_version_major(&bmc->id),
2133 ipmi_version_minor(&bmc->id));
2134}
2135
2136static ssize_t add_dev_support_show(struct device *dev,
2137 struct device_attribute *attr,
2138 char *buf)
2139{
2140 struct bmc_device *bmc = dev_get_drvdata(dev);
2141
2142 return snprintf(buf, 10, "0x%02x\n",
2143 bmc->id.additional_device_support);
2144}
2145
2146static ssize_t manufacturer_id_show(struct device *dev,
2147 struct device_attribute *attr,
2148 char *buf)
2149{
2150 struct bmc_device *bmc = dev_get_drvdata(dev);
2151
2152 return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
2153}
2154
2155static ssize_t product_id_show(struct device *dev,
2156 struct device_attribute *attr,
2157 char *buf)
2158{
2159 struct bmc_device *bmc = dev_get_drvdata(dev);
2160
2161 return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
2162}
2163
2164static ssize_t aux_firmware_rev_show(struct device *dev,
2165 struct device_attribute *attr,
2166 char *buf)
2167{
2168 struct bmc_device *bmc = dev_get_drvdata(dev);
2169
2170 return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2171 bmc->id.aux_firmware_revision[3],
2172 bmc->id.aux_firmware_revision[2],
2173 bmc->id.aux_firmware_revision[1],
2174 bmc->id.aux_firmware_revision[0]);
2175}
2176
2177static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
2178 char *buf)
2179{
2180 struct bmc_device *bmc = dev_get_drvdata(dev);
2181
2182 return snprintf(buf, 100, "%Lx%Lx\n",
2183 (long long) bmc->guid[0],
2184 (long long) bmc->guid[8]);
2185}
2186
2187static void remove_files(struct bmc_device *bmc)
2188{
2189 if (!bmc->dev)
2190 return;
2191
2192 device_remove_file(&bmc->dev->dev,
2193 &bmc->device_id_attr);
2194 device_remove_file(&bmc->dev->dev,
2195 &bmc->provides_dev_sdrs_attr);
2196 device_remove_file(&bmc->dev->dev,
2197 &bmc->revision_attr);
2198 device_remove_file(&bmc->dev->dev,
2199 &bmc->firmware_rev_attr);
2200 device_remove_file(&bmc->dev->dev,
2201 &bmc->version_attr);
2202 device_remove_file(&bmc->dev->dev,
2203 &bmc->add_dev_support_attr);
2204 device_remove_file(&bmc->dev->dev,
2205 &bmc->manufacturer_id_attr);
2206 device_remove_file(&bmc->dev->dev,
2207 &bmc->product_id_attr);
2208
2209 if (bmc->id.aux_firmware_revision_set)
2210 device_remove_file(&bmc->dev->dev,
2211 &bmc->aux_firmware_rev_attr);
2212 if (bmc->guid_set)
2213 device_remove_file(&bmc->dev->dev,
2214 &bmc->guid_attr);
2215}
2216
2217static void
2218cleanup_bmc_device(struct kref *ref)
2219{
2220 struct bmc_device *bmc;
2221
2222 bmc = container_of(ref, struct bmc_device, refcount);
2223
2224 remove_files(bmc);
2225 platform_device_unregister(bmc->dev);
2226 kfree(bmc);
2227}
2228
2229static void ipmi_bmc_unregister(ipmi_smi_t intf)
2230{
2231 struct bmc_device *bmc = intf->bmc;
2232
2233 if (intf->sysfs_name) {
2234 sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
2235 kfree(intf->sysfs_name);
2236 intf->sysfs_name = NULL;
2237 }
2238 if (intf->my_dev_name) {
2239 sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
2240 kfree(intf->my_dev_name);
2241 intf->my_dev_name = NULL;
2242 }
2243
2244 mutex_lock(&ipmidriver_mutex);
2245 kref_put(&bmc->refcount, cleanup_bmc_device);
2246 intf->bmc = NULL;
2247 mutex_unlock(&ipmidriver_mutex);
2248}
2249
2250static int create_files(struct bmc_device *bmc)
2251{
2252 int err;
2253
2254 bmc->device_id_attr.attr.name = "device_id";
2255 bmc->device_id_attr.attr.mode = S_IRUGO;
2256 bmc->device_id_attr.show = device_id_show;
2257
2258 bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
2259 bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
2260 bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
2261
2262 bmc->revision_attr.attr.name = "revision";
2263 bmc->revision_attr.attr.mode = S_IRUGO;
2264 bmc->revision_attr.show = revision_show;
2265
2266 bmc->firmware_rev_attr.attr.name = "firmware_revision";
2267 bmc->firmware_rev_attr.attr.mode = S_IRUGO;
2268 bmc->firmware_rev_attr.show = firmware_rev_show;
2269
2270 bmc->version_attr.attr.name = "ipmi_version";
2271 bmc->version_attr.attr.mode = S_IRUGO;
2272 bmc->version_attr.show = ipmi_version_show;
2273
2274 bmc->add_dev_support_attr.attr.name = "additional_device_support";
2275 bmc->add_dev_support_attr.attr.mode = S_IRUGO;
2276 bmc->add_dev_support_attr.show = add_dev_support_show;
2277
2278 bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
2279 bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
2280 bmc->manufacturer_id_attr.show = manufacturer_id_show;
2281
2282 bmc->product_id_attr.attr.name = "product_id";
2283 bmc->product_id_attr.attr.mode = S_IRUGO;
2284 bmc->product_id_attr.show = product_id_show;
2285
2286 bmc->guid_attr.attr.name = "guid";
2287 bmc->guid_attr.attr.mode = S_IRUGO;
2288 bmc->guid_attr.show = guid_show;
2289
2290 bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
2291 bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
2292 bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
2293
2294 err = device_create_file(&bmc->dev->dev,
2295 &bmc->device_id_attr);
2296 if (err)
2297 goto out;
2298 err = device_create_file(&bmc->dev->dev,
2299 &bmc->provides_dev_sdrs_attr);
2300 if (err)
2301 goto out_devid;
2302 err = device_create_file(&bmc->dev->dev,
2303 &bmc->revision_attr);
2304 if (err)
2305 goto out_sdrs;
2306 err = device_create_file(&bmc->dev->dev,
2307 &bmc->firmware_rev_attr);
2308 if (err)
2309 goto out_rev;
2310 err = device_create_file(&bmc->dev->dev,
2311 &bmc->version_attr);
2312 if (err)
2313 goto out_firm;
2314 err = device_create_file(&bmc->dev->dev,
2315 &bmc->add_dev_support_attr);
2316 if (err)
2317 goto out_version;
2318 err = device_create_file(&bmc->dev->dev,
2319 &bmc->manufacturer_id_attr);
2320 if (err)
2321 goto out_add_dev;
2322 err = device_create_file(&bmc->dev->dev,
2323 &bmc->product_id_attr);
2324 if (err)
2325 goto out_manu;
2326 if (bmc->id.aux_firmware_revision_set) {
2327 err = device_create_file(&bmc->dev->dev,
2328 &bmc->aux_firmware_rev_attr);
2329 if (err)
2330 goto out_prod_id;
2331 }
2332 if (bmc->guid_set) {
2333 err = device_create_file(&bmc->dev->dev,
2334 &bmc->guid_attr);
2335 if (err)
2336 goto out_aux_firm;
2337 }
2338
2339 return 0;
2340
2341out_aux_firm:
2342 if (bmc->id.aux_firmware_revision_set)
2343 device_remove_file(&bmc->dev->dev,
2344 &bmc->aux_firmware_rev_attr);
2345out_prod_id:
2346 device_remove_file(&bmc->dev->dev,
2347 &bmc->product_id_attr);
2348out_manu:
2349 device_remove_file(&bmc->dev->dev,
2350 &bmc->manufacturer_id_attr);
2351out_add_dev:
2352 device_remove_file(&bmc->dev->dev,
2353 &bmc->add_dev_support_attr);
2354out_version:
2355 device_remove_file(&bmc->dev->dev,
2356 &bmc->version_attr);
2357out_firm:
2358 device_remove_file(&bmc->dev->dev,
2359 &bmc->firmware_rev_attr);
2360out_rev:
2361 device_remove_file(&bmc->dev->dev,
2362 &bmc->revision_attr);
2363out_sdrs:
2364 device_remove_file(&bmc->dev->dev,
2365 &bmc->provides_dev_sdrs_attr);
2366out_devid:
2367 device_remove_file(&bmc->dev->dev,
2368 &bmc->device_id_attr);
2369out:
2370 return err;
2371}
2372
2373static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
2374 const char *sysfs_name)
2375{
2376 int rv;
2377 struct bmc_device *bmc = intf->bmc;
2378 struct bmc_device *old_bmc;
2379 int size;
2380 char dummy[1];
2381
2382 mutex_lock(&ipmidriver_mutex);
2383
2384
2385
2386
2387
2388 if (bmc->guid_set)
2389 old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid);
2390 else
2391 old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2392 bmc->id.product_id,
2393 bmc->id.device_id);
2394
2395
2396
2397
2398
2399 if (old_bmc) {
2400 kfree(bmc);
2401 intf->bmc = old_bmc;
2402 bmc = old_bmc;
2403
2404 kref_get(&bmc->refcount);
2405 mutex_unlock(&ipmidriver_mutex);
2406
2407 printk(KERN_INFO
2408 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2409 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2410 bmc->id.manufacturer_id,
2411 bmc->id.product_id,
2412 bmc->id.device_id);
2413 } else {
2414 char name[14];
2415 unsigned char orig_dev_id = bmc->id.device_id;
2416 int warn_printed = 0;
2417
2418 snprintf(name, sizeof(name),
2419 "ipmi_bmc.%4.4x", bmc->id.product_id);
2420
2421 while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2422 bmc->id.product_id,
2423 bmc->id.device_id)) {
2424 if (!warn_printed) {
2425 printk(KERN_WARNING PFX
2426 "This machine has two different BMCs"
2427 " with the same product id and device"
2428 " id. This is an error in the"
2429 " firmware, but incrementing the"
2430 " device id to work around the problem."
2431 " Prod ID = 0x%x, Dev ID = 0x%x\n",
2432 bmc->id.product_id, bmc->id.device_id);
2433 warn_printed = 1;
2434 }
2435 bmc->id.device_id++;
2436 if (bmc->id.device_id == orig_dev_id) {
2437 printk(KERN_ERR PFX
2438 "Out of device ids!\n");
2439 break;
2440 }
2441 }
2442
2443 bmc->dev = platform_device_alloc(name, bmc->id.device_id);
2444 if (!bmc->dev) {
2445 mutex_unlock(&ipmidriver_mutex);
2446 printk(KERN_ERR
2447 "ipmi_msghandler:"
2448 " Unable to allocate platform device\n");
2449 return -ENOMEM;
2450 }
2451 bmc->dev->dev.driver = &ipmidriver.driver;
2452 dev_set_drvdata(&bmc->dev->dev, bmc);
2453 kref_init(&bmc->refcount);
2454
2455 rv = platform_device_add(bmc->dev);
2456 mutex_unlock(&ipmidriver_mutex);
2457 if (rv) {
2458 platform_device_put(bmc->dev);
2459 bmc->dev = NULL;
2460 printk(KERN_ERR
2461 "ipmi_msghandler:"
2462 " Unable to register bmc device: %d\n",
2463 rv);
2464
2465
2466
2467
2468 return rv;
2469 }
2470
2471 rv = create_files(bmc);
2472 if (rv) {
2473 mutex_lock(&ipmidriver_mutex);
2474 platform_device_unregister(bmc->dev);
2475 mutex_unlock(&ipmidriver_mutex);
2476
2477 return rv;
2478 }
2479
2480 printk(KERN_INFO
2481 "ipmi: Found new BMC (man_id: 0x%6.6x, "
2482 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2483 bmc->id.manufacturer_id,
2484 bmc->id.product_id,
2485 bmc->id.device_id);
2486 }
2487
2488
2489
2490
2491
2492 intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
2493 if (!intf->sysfs_name) {
2494 rv = -ENOMEM;
2495 printk(KERN_ERR
2496 "ipmi_msghandler: allocate link to BMC: %d\n",
2497 rv);
2498 goto out_err;
2499 }
2500
2501 rv = sysfs_create_link(&intf->si_dev->kobj,
2502 &bmc->dev->dev.kobj, intf->sysfs_name);
2503 if (rv) {
2504 kfree(intf->sysfs_name);
2505 intf->sysfs_name = NULL;
2506 printk(KERN_ERR
2507 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2508 rv);
2509 goto out_err;
2510 }
2511
2512 size = snprintf(dummy, 0, "ipmi%d", ifnum);
2513 intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
2514 if (!intf->my_dev_name) {
2515 kfree(intf->sysfs_name);
2516 intf->sysfs_name = NULL;
2517 rv = -ENOMEM;
2518 printk(KERN_ERR
2519 "ipmi_msghandler: allocate link from BMC: %d\n",
2520 rv);
2521 goto out_err;
2522 }
2523 snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
2524
2525 rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
2526 intf->my_dev_name);
2527 if (rv) {
2528 kfree(intf->sysfs_name);
2529 intf->sysfs_name = NULL;
2530 kfree(intf->my_dev_name);
2531 intf->my_dev_name = NULL;
2532 printk(KERN_ERR
2533 "ipmi_msghandler:"
2534 " Unable to create symlink to bmc: %d\n",
2535 rv);
2536 goto out_err;
2537 }
2538
2539 return 0;
2540
2541out_err:
2542 ipmi_bmc_unregister(intf);
2543 return rv;
2544}
2545
2546static int
2547send_guid_cmd(ipmi_smi_t intf, int chan)
2548{
2549 struct kernel_ipmi_msg msg;
2550 struct ipmi_system_interface_addr si;
2551
2552 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2553 si.channel = IPMI_BMC_CHANNEL;
2554 si.lun = 0;
2555
2556 msg.netfn = IPMI_NETFN_APP_REQUEST;
2557 msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2558 msg.data = NULL;
2559 msg.data_len = 0;
2560 return i_ipmi_request(NULL,
2561 intf,
2562 (struct ipmi_addr *) &si,
2563 0,
2564 &msg,
2565 intf,
2566 NULL,
2567 NULL,
2568 0,
2569 intf->channels[0].address,
2570 intf->channels[0].lun,
2571 -1, 0);
2572}
2573
2574static void
2575guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2576{
2577 if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2578 || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2579 || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2580
2581 return;
2582
2583 if (msg->msg.data[0] != 0) {
2584
2585 intf->bmc->guid_set = 0;
2586 goto out;
2587 }
2588
2589 if (msg->msg.data_len < 17) {
2590 intf->bmc->guid_set = 0;
2591 printk(KERN_WARNING PFX
2592 "guid_handler: The GUID response from the BMC was too"
2593 " short, it was %d but should have been 17. Assuming"
2594 " GUID is not available.\n",
2595 msg->msg.data_len);
2596 goto out;
2597 }
2598
2599 memcpy(intf->bmc->guid, msg->msg.data, 16);
2600 intf->bmc->guid_set = 1;
2601 out:
2602 wake_up(&intf->waitq);
2603}
2604
2605static void
2606get_guid(ipmi_smi_t intf)
2607{
2608 int rv;
2609
2610 intf->bmc->guid_set = 0x2;
2611 intf->null_user_handler = guid_handler;
2612 rv = send_guid_cmd(intf, 0);
2613 if (rv)
2614
2615 intf->bmc->guid_set = 0;
2616 wait_event(intf->waitq, intf->bmc->guid_set != 2);
2617 intf->null_user_handler = NULL;
2618}
2619
2620static int
2621send_channel_info_cmd(ipmi_smi_t intf, int chan)
2622{
2623 struct kernel_ipmi_msg msg;
2624 unsigned char data[1];
2625 struct ipmi_system_interface_addr si;
2626
2627 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2628 si.channel = IPMI_BMC_CHANNEL;
2629 si.lun = 0;
2630
2631 msg.netfn = IPMI_NETFN_APP_REQUEST;
2632 msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2633 msg.data = data;
2634 msg.data_len = 1;
2635 data[0] = chan;
2636 return i_ipmi_request(NULL,
2637 intf,
2638 (struct ipmi_addr *) &si,
2639 0,
2640 &msg,
2641 intf,
2642 NULL,
2643 NULL,
2644 0,
2645 intf->channels[0].address,
2646 intf->channels[0].lun,
2647 -1, 0);
2648}
2649
2650static void
2651channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2652{
2653 int rv = 0;
2654 int chan;
2655
2656 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2657 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
2658 && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
2659
2660 if (msg->msg.data[0] != 0) {
2661
2662
2663 if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
2664
2665
2666
2667
2668
2669
2670 intf->channels[0].medium
2671 = IPMI_CHANNEL_MEDIUM_IPMB;
2672 intf->channels[0].protocol
2673 = IPMI_CHANNEL_PROTOCOL_IPMB;
2674 rv = -ENOSYS;
2675
2676 intf->curr_channel = IPMI_MAX_CHANNELS;
2677 wake_up(&intf->waitq);
2678 goto out;
2679 }
2680 goto next_channel;
2681 }
2682 if (msg->msg.data_len < 4) {
2683
2684 goto next_channel;
2685 }
2686 chan = intf->curr_channel;
2687 intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2688 intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
2689
2690 next_channel:
2691 intf->curr_channel++;
2692 if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2693 wake_up(&intf->waitq);
2694 else
2695 rv = send_channel_info_cmd(intf, intf->curr_channel);
2696
2697 if (rv) {
2698
2699 intf->curr_channel = IPMI_MAX_CHANNELS;
2700 wake_up(&intf->waitq);
2701
2702 printk(KERN_WARNING PFX
2703 "Error sending channel information: %d\n",
2704 rv);
2705 }
2706 }
2707 out:
2708 return;
2709}
2710
2711void ipmi_poll_interface(ipmi_user_t user)
2712{
2713 ipmi_smi_t intf = user->intf;
2714
2715 if (intf->handlers->poll)
2716 intf->handlers->poll(intf->send_info);
2717}
2718EXPORT_SYMBOL(ipmi_poll_interface);
2719
2720int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2721 void *send_info,
2722 struct ipmi_device_id *device_id,
2723 struct device *si_dev,
2724 const char *sysfs_name,
2725 unsigned char slave_addr)
2726{
2727 int i, j;
2728 int rv;
2729 ipmi_smi_t intf;
2730 ipmi_smi_t tintf;
2731 struct list_head *link;
2732
2733
2734
2735
2736
2737 if (!initialized) {
2738 rv = ipmi_init_msghandler();
2739 if (rv)
2740 return rv;
2741
2742
2743
2744
2745 if (!initialized)
2746 return -ENODEV;
2747 }
2748
2749 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
2750 if (!intf)
2751 return -ENOMEM;
2752
2753 intf->ipmi_version_major = ipmi_version_major(device_id);
2754 intf->ipmi_version_minor = ipmi_version_minor(device_id);
2755
2756 intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2757 if (!intf->bmc) {
2758 kfree(intf);
2759 return -ENOMEM;
2760 }
2761 intf->intf_num = -1;
2762 kref_init(&intf->refcount);
2763 intf->bmc->id = *device_id;
2764 intf->si_dev = si_dev;
2765 for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2766 intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2767 intf->channels[j].lun = 2;
2768 }
2769 if (slave_addr != 0)
2770 intf->channels[0].address = slave_addr;
2771 INIT_LIST_HEAD(&intf->users);
2772 intf->handlers = handlers;
2773 intf->send_info = send_info;
2774 spin_lock_init(&intf->seq_lock);
2775 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2776 intf->seq_table[j].inuse = 0;
2777 intf->seq_table[j].seqid = 0;
2778 }
2779 intf->curr_seq = 0;
2780#ifdef CONFIG_PROC_FS
2781 mutex_init(&intf->proc_entry_lock);
2782#endif
2783 spin_lock_init(&intf->waiting_msgs_lock);
2784 INIT_LIST_HEAD(&intf->waiting_msgs);
2785 spin_lock_init(&intf->events_lock);
2786 INIT_LIST_HEAD(&intf->waiting_events);
2787 intf->waiting_events_count = 0;
2788 mutex_init(&intf->cmd_rcvrs_mutex);
2789 spin_lock_init(&intf->maintenance_mode_lock);
2790 INIT_LIST_HEAD(&intf->cmd_rcvrs);
2791 init_waitqueue_head(&intf->waitq);
2792 for (i = 0; i < IPMI_NUM_STATS; i++)
2793 atomic_set(&intf->stats[i], 0);
2794
2795 intf->proc_dir = NULL;
2796
2797 mutex_lock(&smi_watchers_mutex);
2798 mutex_lock(&ipmi_interfaces_mutex);
2799
2800 i = 0;
2801 link = &ipmi_interfaces;
2802 list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
2803 if (tintf->intf_num != i) {
2804 link = &tintf->link;
2805 break;
2806 }
2807 i++;
2808 }
2809
2810 if (i == 0)
2811 list_add_rcu(&intf->link, &ipmi_interfaces);
2812 else
2813 list_add_tail_rcu(&intf->link, link);
2814
2815 rv = handlers->start_processing(send_info, intf);
2816 if (rv)
2817 goto out;
2818
2819 get_guid(intf);
2820
2821 if ((intf->ipmi_version_major > 1)
2822 || ((intf->ipmi_version_major == 1)
2823 && (intf->ipmi_version_minor >= 5))) {
2824
2825
2826
2827
2828 intf->null_user_handler = channel_handler;
2829 intf->curr_channel = 0;
2830 rv = send_channel_info_cmd(intf, 0);
2831 if (rv)
2832 goto out;
2833
2834
2835 wait_event(intf->waitq,
2836 intf->curr_channel >= IPMI_MAX_CHANNELS);
2837 intf->null_user_handler = NULL;
2838 } else {
2839
2840 intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2841 intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
2842 }
2843
2844 if (rv == 0)
2845 rv = add_proc_entries(intf, i);
2846
2847 rv = ipmi_bmc_register(intf, i, sysfs_name);
2848
2849 out:
2850 if (rv) {
2851 if (intf->proc_dir)
2852 remove_proc_entries(intf);
2853 intf->handlers = NULL;
2854 list_del_rcu(&intf->link);
2855 mutex_unlock(&ipmi_interfaces_mutex);
2856 mutex_unlock(&smi_watchers_mutex);
2857 synchronize_rcu();
2858 kref_put(&intf->refcount, intf_free);
2859 } else {
2860
2861
2862
2863
2864
2865 smp_wmb();
2866 intf->intf_num = i;
2867 mutex_unlock(&ipmi_interfaces_mutex);
2868
2869 call_smi_watchers(i, intf->si_dev);
2870 mutex_unlock(&smi_watchers_mutex);
2871 }
2872
2873 return rv;
2874}
2875EXPORT_SYMBOL(ipmi_register_smi);
2876
2877static void cleanup_smi_msgs(ipmi_smi_t intf)
2878{
2879 int i;
2880 struct seq_table *ent;
2881
2882
2883 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
2884 ent = &(intf->seq_table[i]);
2885 if (!ent->inuse)
2886 continue;
2887 deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
2888 }
2889}
2890
2891int ipmi_unregister_smi(ipmi_smi_t intf)
2892{
2893 struct ipmi_smi_watcher *w;
2894 int intf_num = intf->intf_num;
2895
2896 ipmi_bmc_unregister(intf);
2897
2898 mutex_lock(&smi_watchers_mutex);
2899 mutex_lock(&ipmi_interfaces_mutex);
2900 intf->intf_num = -1;
2901 intf->handlers = NULL;
2902 list_del_rcu(&intf->link);
2903 mutex_unlock(&ipmi_interfaces_mutex);
2904 synchronize_rcu();
2905
2906 cleanup_smi_msgs(intf);
2907
2908 remove_proc_entries(intf);
2909
2910
2911
2912
2913
2914 list_for_each_entry(w, &smi_watchers, link)
2915 w->smi_gone(intf_num);
2916 mutex_unlock(&smi_watchers_mutex);
2917
2918 kref_put(&intf->refcount, intf_free);
2919 return 0;
2920}
2921EXPORT_SYMBOL(ipmi_unregister_smi);
2922
2923static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
2924 struct ipmi_smi_msg *msg)
2925{
2926 struct ipmi_ipmb_addr ipmb_addr;
2927 struct ipmi_recv_msg *recv_msg;
2928
2929
2930
2931
2932
2933 if (msg->rsp_size < 11) {
2934
2935 ipmi_inc_stat(intf, invalid_ipmb_responses);
2936 return 0;
2937 }
2938
2939 if (msg->rsp[2] != 0) {
2940
2941 return 0;
2942 }
2943
2944 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
2945 ipmb_addr.slave_addr = msg->rsp[6];
2946 ipmb_addr.channel = msg->rsp[3] & 0x0f;
2947 ipmb_addr.lun = msg->rsp[7] & 3;
2948
2949
2950
2951
2952
2953 if (intf_find_seq(intf,
2954 msg->rsp[7] >> 2,
2955 msg->rsp[3] & 0x0f,
2956 msg->rsp[8],
2957 (msg->rsp[4] >> 2) & (~1),
2958 (struct ipmi_addr *) &(ipmb_addr),
2959 &recv_msg)) {
2960
2961
2962
2963
2964 ipmi_inc_stat(intf, unhandled_ipmb_responses);
2965 return 0;
2966 }
2967
2968 memcpy(recv_msg->msg_data,
2969 &(msg->rsp[9]),
2970 msg->rsp_size - 9);
2971
2972
2973
2974
2975
2976 recv_msg->msg.netfn = msg->rsp[4] >> 2;
2977 recv_msg->msg.data = recv_msg->msg_data;
2978 recv_msg->msg.data_len = msg->rsp_size - 10;
2979 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2980 ipmi_inc_stat(intf, handled_ipmb_responses);
2981 deliver_response(recv_msg);
2982
2983 return 0;
2984}
2985
2986static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
2987 struct ipmi_smi_msg *msg)
2988{
2989 struct cmd_rcvr *rcvr;
2990 int rv = 0;
2991 unsigned char netfn;
2992 unsigned char cmd;
2993 unsigned char chan;
2994 ipmi_user_t user = NULL;
2995 struct ipmi_ipmb_addr *ipmb_addr;
2996 struct ipmi_recv_msg *recv_msg;
2997 struct ipmi_smi_handlers *handlers;
2998
2999 if (msg->rsp_size < 10) {
3000
3001 ipmi_inc_stat(intf, invalid_commands);
3002 return 0;
3003 }
3004
3005 if (msg->rsp[2] != 0) {
3006
3007 return 0;
3008 }
3009
3010 netfn = msg->rsp[4] >> 2;
3011 cmd = msg->rsp[8];
3012 chan = msg->rsp[3] & 0xf;
3013
3014 rcu_read_lock();
3015 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3016 if (rcvr) {
3017 user = rcvr->user;
3018 kref_get(&user->refcount);
3019 } else
3020 user = NULL;
3021 rcu_read_unlock();
3022
3023 if (user == NULL) {
3024
3025 ipmi_inc_stat(intf, unhandled_commands);
3026
3027 msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
3028 msg->data[1] = IPMI_SEND_MSG_CMD;
3029 msg->data[2] = msg->rsp[3];
3030 msg->data[3] = msg->rsp[6];
3031 msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
3032 msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
3033 msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
3034
3035 msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
3036 msg->data[8] = msg->rsp[8];
3037 msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
3038 msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
3039 msg->data_size = 11;
3040
3041#ifdef DEBUG_MSGING
3042 {
3043 int m;
3044 printk("Invalid command:");
3045 for (m = 0; m < msg->data_size; m++)
3046 printk(" %2.2x", msg->data[m]);
3047 printk("\n");
3048 }
3049#endif
3050 rcu_read_lock();
3051 handlers = intf->handlers;
3052 if (handlers) {
3053 handlers->sender(intf->send_info, msg, 0);
3054
3055
3056
3057
3058
3059 rv = -1;
3060 }
3061 rcu_read_unlock();
3062 } else {
3063
3064 ipmi_inc_stat(intf, handled_commands);
3065
3066 recv_msg = ipmi_alloc_recv_msg();
3067 if (!recv_msg) {
3068
3069
3070
3071
3072
3073 rv = 1;
3074 kref_put(&user->refcount, free_user);
3075 } else {
3076
3077 ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
3078 ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
3079 ipmb_addr->slave_addr = msg->rsp[6];
3080 ipmb_addr->lun = msg->rsp[7] & 3;
3081 ipmb_addr->channel = msg->rsp[3] & 0xf;
3082
3083
3084
3085
3086
3087 recv_msg->user = user;
3088 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3089 recv_msg->msgid = msg->rsp[7] >> 2;
3090 recv_msg->msg.netfn = msg->rsp[4] >> 2;
3091 recv_msg->msg.cmd = msg->rsp[8];
3092 recv_msg->msg.data = recv_msg->msg_data;
3093
3094
3095
3096
3097
3098 recv_msg->msg.data_len = msg->rsp_size - 10;
3099 memcpy(recv_msg->msg_data,
3100 &(msg->rsp[9]),
3101 msg->rsp_size - 10);
3102 deliver_response(recv_msg);
3103 }
3104 }
3105
3106 return rv;
3107}
3108
3109static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
3110 struct ipmi_smi_msg *msg)
3111{
3112 struct ipmi_lan_addr lan_addr;
3113 struct ipmi_recv_msg *recv_msg;
3114
3115
3116
3117
3118
3119
3120 if (msg->rsp_size < 13) {
3121
3122 ipmi_inc_stat(intf, invalid_lan_responses);
3123 return 0;
3124 }
3125
3126 if (msg->rsp[2] != 0) {
3127
3128 return 0;
3129 }
3130
3131 lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
3132 lan_addr.session_handle = msg->rsp[4];
3133 lan_addr.remote_SWID = msg->rsp[8];
3134 lan_addr.local_SWID = msg->rsp[5];
3135 lan_addr.channel = msg->rsp[3] & 0x0f;
3136 lan_addr.privilege = msg->rsp[3] >> 4;
3137 lan_addr.lun = msg->rsp[9] & 3;
3138
3139
3140
3141
3142
3143 if (intf_find_seq(intf,
3144 msg->rsp[9] >> 2,
3145 msg->rsp[3] & 0x0f,
3146 msg->rsp[10],
3147 (msg->rsp[6] >> 2) & (~1),
3148 (struct ipmi_addr *) &(lan_addr),
3149 &recv_msg)) {
3150
3151
3152
3153
3154 ipmi_inc_stat(intf, unhandled_lan_responses);
3155 return 0;
3156 }
3157
3158 memcpy(recv_msg->msg_data,
3159 &(msg->rsp[11]),
3160 msg->rsp_size - 11);
3161
3162
3163
3164
3165
3166 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3167 recv_msg->msg.data = recv_msg->msg_data;
3168 recv_msg->msg.data_len = msg->rsp_size - 12;
3169 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3170 ipmi_inc_stat(intf, handled_lan_responses);
3171 deliver_response(recv_msg);
3172
3173 return 0;
3174}
3175
3176static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
3177 struct ipmi_smi_msg *msg)
3178{
3179 struct cmd_rcvr *rcvr;
3180 int rv = 0;
3181 unsigned char netfn;
3182 unsigned char cmd;
3183 unsigned char chan;
3184 ipmi_user_t user = NULL;
3185 struct ipmi_lan_addr *lan_addr;
3186 struct ipmi_recv_msg *recv_msg;
3187
3188 if (msg->rsp_size < 12) {
3189
3190 ipmi_inc_stat(intf, invalid_commands);
3191 return 0;
3192 }
3193
3194 if (msg->rsp[2] != 0) {
3195
3196 return 0;
3197 }
3198
3199 netfn = msg->rsp[6] >> 2;
3200 cmd = msg->rsp[10];
3201 chan = msg->rsp[3] & 0xf;
3202
3203 rcu_read_lock();
3204 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3205 if (rcvr) {
3206 user = rcvr->user;
3207 kref_get(&user->refcount);
3208 } else
3209 user = NULL;
3210 rcu_read_unlock();
3211
3212 if (user == NULL) {
3213
3214 ipmi_inc_stat(intf, unhandled_commands);
3215
3216
3217
3218
3219
3220 rv = 0;
3221 } else {
3222
3223 ipmi_inc_stat(intf, handled_commands);
3224
3225 recv_msg = ipmi_alloc_recv_msg();
3226 if (!recv_msg) {
3227
3228
3229
3230
3231 rv = 1;
3232 kref_put(&user->refcount, free_user);
3233 } else {
3234
3235 lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
3236 lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
3237 lan_addr->session_handle = msg->rsp[4];
3238 lan_addr->remote_SWID = msg->rsp[8];
3239 lan_addr->local_SWID = msg->rsp[5];
3240 lan_addr->lun = msg->rsp[9] & 3;
3241 lan_addr->channel = msg->rsp[3] & 0xf;
3242 lan_addr->privilege = msg->rsp[3] >> 4;
3243
3244
3245
3246
3247
3248 recv_msg->user = user;
3249 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3250 recv_msg->msgid = msg->rsp[9] >> 2;
3251 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3252 recv_msg->msg.cmd = msg->rsp[10];
3253 recv_msg->msg.data = recv_msg->msg_data;
3254
3255
3256
3257
3258
3259 recv_msg->msg.data_len = msg->rsp_size - 12;
3260 memcpy(recv_msg->msg_data,
3261 &(msg->rsp[11]),
3262 msg->rsp_size - 12);
3263 deliver_response(recv_msg);
3264 }
3265 }
3266
3267 return rv;
3268}
3269
3270static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
3271 struct ipmi_smi_msg *msg)
3272{
3273 struct ipmi_system_interface_addr *smi_addr;
3274
3275 recv_msg->msgid = 0;
3276 smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
3277 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3278 smi_addr->channel = IPMI_BMC_CHANNEL;
3279 smi_addr->lun = msg->rsp[0] & 3;
3280 recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
3281 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3282 recv_msg->msg.cmd = msg->rsp[1];
3283 memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
3284 recv_msg->msg.data = recv_msg->msg_data;
3285 recv_msg->msg.data_len = msg->rsp_size - 3;
3286}
3287
3288static int handle_read_event_rsp(ipmi_smi_t intf,
3289 struct ipmi_smi_msg *msg)
3290{
3291 struct ipmi_recv_msg *recv_msg, *recv_msg2;
3292 struct list_head msgs;
3293 ipmi_user_t user;
3294 int rv = 0;
3295 int deliver_count = 0;
3296 unsigned long flags;
3297
3298 if (msg->rsp_size < 19) {
3299
3300 ipmi_inc_stat(intf, invalid_events);
3301 return 0;
3302 }
3303
3304 if (msg->rsp[2] != 0) {
3305
3306 return 0;
3307 }
3308
3309 INIT_LIST_HEAD(&msgs);
3310
3311 spin_lock_irqsave(&intf->events_lock, flags);
3312
3313 ipmi_inc_stat(intf, events);
3314
3315
3316
3317
3318
3319 rcu_read_lock();
3320 list_for_each_entry_rcu(user, &intf->users, link) {
3321 if (!user->gets_events)
3322 continue;
3323
3324 recv_msg = ipmi_alloc_recv_msg();
3325 if (!recv_msg) {
3326 rcu_read_unlock();
3327 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
3328 link) {
3329 list_del(&recv_msg->link);
3330 ipmi_free_recv_msg(recv_msg);
3331 }
3332
3333
3334
3335
3336
3337 rv = 1;
3338 goto out;
3339 }
3340
3341 deliver_count++;
3342
3343 copy_event_into_recv_msg(recv_msg, msg);
3344 recv_msg->user = user;
3345 kref_get(&user->refcount);
3346 list_add_tail(&(recv_msg->link), &msgs);
3347 }
3348 rcu_read_unlock();
3349
3350 if (deliver_count) {
3351
3352 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
3353 list_del(&recv_msg->link);
3354 deliver_response(recv_msg);
3355 }
3356 } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
3357
3358
3359
3360
3361 recv_msg = ipmi_alloc_recv_msg();
3362 if (!recv_msg) {
3363
3364
3365
3366
3367
3368 rv = 1;
3369 goto out;
3370 }
3371
3372 copy_event_into_recv_msg(recv_msg, msg);
3373 list_add_tail(&(recv_msg->link), &(intf->waiting_events));
3374 intf->waiting_events_count++;
3375 } else if (!intf->event_msg_printed) {
3376
3377
3378
3379
3380 printk(KERN_WARNING PFX "Event queue full, discarding"
3381 " incoming events\n");
3382 intf->event_msg_printed = 1;
3383 }
3384
3385 out:
3386 spin_unlock_irqrestore(&(intf->events_lock), flags);
3387
3388 return rv;
3389}
3390
3391static int handle_bmc_rsp(ipmi_smi_t intf,
3392 struct ipmi_smi_msg *msg)
3393{
3394 struct ipmi_recv_msg *recv_msg;
3395 struct ipmi_user *user;
3396
3397 recv_msg = (struct ipmi_recv_msg *) msg->user_data;
3398 if (recv_msg == NULL) {
3399 printk(KERN_WARNING
3400 "IPMI message received with no owner. This\n"
3401 "could be because of a malformed message, or\n"
3402 "because of a hardware error. Contact your\n"
3403 "hardware vender for assistance\n");
3404 return 0;
3405 }
3406
3407 user = recv_msg->user;
3408
3409 if (user && !user->valid) {
3410
3411 ipmi_inc_stat(intf, unhandled_local_responses);
3412 ipmi_free_recv_msg(recv_msg);
3413 } else {
3414 struct ipmi_system_interface_addr *smi_addr;
3415
3416 ipmi_inc_stat(intf, handled_local_responses);
3417 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3418 recv_msg->msgid = msg->msgid;
3419 smi_addr = ((struct ipmi_system_interface_addr *)
3420 &(recv_msg->addr));
3421 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3422 smi_addr->channel = IPMI_BMC_CHANNEL;
3423 smi_addr->lun = msg->rsp[0] & 3;
3424 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3425 recv_msg->msg.cmd = msg->rsp[1];
3426 memcpy(recv_msg->msg_data,
3427 &(msg->rsp[2]),
3428 msg->rsp_size - 2);
3429 recv_msg->msg.data = recv_msg->msg_data;
3430 recv_msg->msg.data_len = msg->rsp_size - 2;
3431 deliver_response(recv_msg);
3432 }
3433
3434 return 0;
3435}
3436
3437
3438
3439
3440
3441
3442static int handle_new_recv_msg(ipmi_smi_t intf,
3443 struct ipmi_smi_msg *msg)
3444{
3445 int requeue;
3446 int chan;
3447
3448#ifdef DEBUG_MSGING
3449 int m;
3450 printk("Recv:");
3451 for (m = 0; m < msg->rsp_size; m++)
3452 printk(" %2.2x", msg->rsp[m]);
3453 printk("\n");
3454#endif
3455 if (msg->rsp_size < 2) {
3456
3457 printk(KERN_WARNING PFX "BMC returned to small a message"
3458 " for netfn %x cmd %x, got %d bytes\n",
3459 (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3460
3461
3462 msg->rsp[0] = msg->data[0] | (1 << 2);
3463 msg->rsp[1] = msg->data[1];
3464 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3465 msg->rsp_size = 3;
3466 } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
3467 || (msg->rsp[1] != msg->data[1])) {
3468
3469
3470
3471
3472 printk(KERN_WARNING PFX "BMC returned incorrect response,"
3473 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3474 (msg->data[0] >> 2) | 1, msg->data[1],
3475 msg->rsp[0] >> 2, msg->rsp[1]);
3476
3477
3478 msg->rsp[0] = msg->data[0] | (1 << 2);
3479 msg->rsp[1] = msg->data[1];
3480 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3481 msg->rsp_size = 3;
3482 }
3483
3484 if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3485 && (msg->rsp[1] == IPMI_SEND_MSG_CMD)
3486 && (msg->user_data != NULL)) {
3487
3488
3489
3490
3491 struct ipmi_recv_msg *recv_msg = msg->user_data;
3492
3493 requeue = 0;
3494 if (msg->rsp_size < 2)
3495
3496 goto out;
3497
3498 chan = msg->data[2] & 0x0f;
3499 if (chan >= IPMI_MAX_CHANNELS)
3500
3501 goto out;
3502
3503 if (!recv_msg)
3504 goto out;
3505
3506
3507 if (!recv_msg->user || !recv_msg->user->valid)
3508 goto out;
3509
3510 recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3511 recv_msg->msg.data = recv_msg->msg_data;
3512 recv_msg->msg.data_len = 1;
3513 recv_msg->msg_data[0] = msg->rsp[2];
3514 deliver_response(recv_msg);
3515 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3516 && (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
3517
3518 chan = msg->rsp[3] & 0xf;
3519 if (chan >= IPMI_MAX_CHANNELS) {
3520
3521 requeue = 0;
3522 goto out;
3523 }
3524
3525 switch (intf->channels[chan].medium) {
3526 case IPMI_CHANNEL_MEDIUM_IPMB:
3527 if (msg->rsp[4] & 0x04) {
3528
3529
3530
3531
3532 requeue = handle_ipmb_get_msg_rsp(intf, msg);
3533 } else {
3534
3535
3536
3537
3538 requeue = handle_ipmb_get_msg_cmd(intf, msg);
3539 }
3540 break;
3541
3542 case IPMI_CHANNEL_MEDIUM_8023LAN:
3543 case IPMI_CHANNEL_MEDIUM_ASYNC:
3544 if (msg->rsp[6] & 0x04) {
3545
3546
3547
3548
3549 requeue = handle_lan_get_msg_rsp(intf, msg);
3550 } else {
3551
3552
3553
3554
3555 requeue = handle_lan_get_msg_cmd(intf, msg);
3556 }
3557 break;
3558
3559 default:
3560
3561
3562
3563
3564 requeue = 0;
3565 }
3566
3567 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3568 && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
3569
3570 requeue = handle_read_event_rsp(intf, msg);
3571 } else {
3572
3573 requeue = handle_bmc_rsp(intf, msg);
3574 }
3575
3576 out:
3577 return requeue;
3578}
3579
3580
3581void ipmi_smi_msg_received(ipmi_smi_t intf,
3582 struct ipmi_smi_msg *msg)
3583{
3584 unsigned long flags = 0;
3585 int rv;
3586 int run_to_completion;
3587
3588
3589 if ((msg->data_size >= 2)
3590 && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3591 && (msg->data[1] == IPMI_SEND_MSG_CMD)
3592 && (msg->user_data == NULL)) {
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606 if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3607 && (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
3608 && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
3609 && (msg->rsp[2] != IPMI_BUS_ERR)
3610 && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
3611 int chan = msg->rsp[3] & 0xf;
3612
3613
3614 if (chan >= IPMI_MAX_CHANNELS)
3615 ;
3616 else if ((intf->channels[chan].medium
3617 == IPMI_CHANNEL_MEDIUM_8023LAN)
3618 || (intf->channels[chan].medium
3619 == IPMI_CHANNEL_MEDIUM_ASYNC))
3620 ipmi_inc_stat(intf, sent_lan_command_errs);
3621 else
3622 ipmi_inc_stat(intf, sent_ipmb_command_errs);
3623 intf_err_seq(intf, msg->msgid, msg->rsp[2]);
3624 } else
3625
3626 intf_start_seq_timer(intf, msg->msgid);
3627
3628 ipmi_free_smi_msg(msg);
3629 goto out;
3630 }
3631
3632
3633
3634
3635
3636 run_to_completion = intf->run_to_completion;
3637 if (!run_to_completion)
3638 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3639 if (!list_empty(&intf->waiting_msgs)) {
3640 list_add_tail(&msg->link, &intf->waiting_msgs);
3641 if (!run_to_completion)
3642 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3643 goto out;
3644 }
3645 if (!run_to_completion)
3646 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3647
3648 rv = handle_new_recv_msg(intf, msg);
3649 if (rv > 0) {
3650
3651
3652
3653
3654 run_to_completion = intf->run_to_completion;
3655 if (!run_to_completion)
3656 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3657 list_add_tail(&msg->link, &intf->waiting_msgs);
3658 if (!run_to_completion)
3659 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3660 } else if (rv == 0) {
3661 ipmi_free_smi_msg(msg);
3662 }
3663
3664 out:
3665 return;
3666}
3667EXPORT_SYMBOL(ipmi_smi_msg_received);
3668
3669void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3670{
3671 ipmi_user_t user;
3672
3673 rcu_read_lock();
3674 list_for_each_entry_rcu(user, &intf->users, link) {
3675 if (!user->handler->ipmi_watchdog_pretimeout)
3676 continue;
3677
3678 user->handler->ipmi_watchdog_pretimeout(user->handler_data);
3679 }
3680 rcu_read_unlock();
3681}
3682EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
3683
3684static struct ipmi_smi_msg *
3685smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3686 unsigned char seq, long seqid)
3687{
3688 struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
3689 if (!smi_msg)
3690
3691
3692
3693
3694 return NULL;
3695
3696 memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3697 smi_msg->data_size = recv_msg->msg.data_len;
3698 smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
3699
3700#ifdef DEBUG_MSGING
3701 {
3702 int m;
3703 printk("Resend: ");
3704 for (m = 0; m < smi_msg->data_size; m++)
3705 printk(" %2.2x", smi_msg->data[m]);
3706 printk("\n");
3707 }
3708#endif
3709 return smi_msg;
3710}
3711
3712static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3713 struct list_head *timeouts, long timeout_period,
3714 int slot, unsigned long *flags)
3715{
3716 struct ipmi_recv_msg *msg;
3717 struct ipmi_smi_handlers *handlers;
3718
3719 if (intf->intf_num == -1)
3720 return;
3721
3722 if (!ent->inuse)
3723 return;
3724
3725 ent->timeout -= timeout_period;
3726 if (ent->timeout > 0)
3727 return;
3728
3729 if (ent->retries_left == 0) {
3730
3731 ent->inuse = 0;
3732 msg = ent->recv_msg;
3733 list_add_tail(&msg->link, timeouts);
3734 if (ent->broadcast)
3735 ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
3736 else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3737 ipmi_inc_stat(intf, timed_out_lan_commands);
3738 else
3739 ipmi_inc_stat(intf, timed_out_ipmb_commands);
3740 } else {
3741 struct ipmi_smi_msg *smi_msg;
3742
3743
3744
3745
3746
3747
3748 ent->timeout = MAX_MSG_TIMEOUT;
3749 ent->retries_left--;
3750 if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3751 ipmi_inc_stat(intf, retransmitted_lan_commands);
3752 else
3753 ipmi_inc_stat(intf, retransmitted_ipmb_commands);
3754
3755 smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3756 ent->seqid);
3757 if (!smi_msg)
3758 return;
3759
3760 spin_unlock_irqrestore(&intf->seq_lock, *flags);
3761
3762
3763
3764
3765
3766
3767
3768
3769 handlers = intf->handlers;
3770 if (handlers)
3771 intf->handlers->sender(intf->send_info,
3772 smi_msg, 0);
3773 else
3774 ipmi_free_smi_msg(smi_msg);
3775
3776 spin_lock_irqsave(&intf->seq_lock, *flags);
3777 }
3778}
3779
3780static void ipmi_timeout_handler(long timeout_period)
3781{
3782 ipmi_smi_t intf;
3783 struct list_head timeouts;
3784 struct ipmi_recv_msg *msg, *msg2;
3785 struct ipmi_smi_msg *smi_msg, *smi_msg2;
3786 unsigned long flags;
3787 int i;
3788
3789 rcu_read_lock();
3790 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
3791
3792 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3793 list_for_each_entry_safe(smi_msg, smi_msg2,
3794 &intf->waiting_msgs, link) {
3795 if (!handle_new_recv_msg(intf, smi_msg)) {
3796 list_del(&smi_msg->link);
3797 ipmi_free_smi_msg(smi_msg);
3798 } else {
3799
3800
3801
3802
3803 break;
3804 }
3805 }
3806 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3807
3808
3809
3810
3811
3812
3813 INIT_LIST_HEAD(&timeouts);
3814 spin_lock_irqsave(&intf->seq_lock, flags);
3815 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
3816 check_msg_timeout(intf, &(intf->seq_table[i]),
3817 &timeouts, timeout_period, i,
3818 &flags);
3819 spin_unlock_irqrestore(&intf->seq_lock, flags);
3820
3821 list_for_each_entry_safe(msg, msg2, &timeouts, link)
3822 deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832 if (intf->auto_maintenance_timeout > 0) {
3833 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
3834 if (intf->auto_maintenance_timeout > 0) {
3835 intf->auto_maintenance_timeout
3836 -= timeout_period;
3837 if (!intf->maintenance_mode
3838 && (intf->auto_maintenance_timeout <= 0)) {
3839 intf->maintenance_mode_enable = 0;
3840 maintenance_mode_update(intf);
3841 }
3842 }
3843 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
3844 flags);
3845 }
3846 }
3847 rcu_read_unlock();
3848}
3849
3850static void ipmi_request_event(void)
3851{
3852 ipmi_smi_t intf;
3853 struct ipmi_smi_handlers *handlers;
3854
3855 rcu_read_lock();
3856
3857
3858
3859
3860 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
3861
3862 if (intf->maintenance_mode_enable)
3863 continue;
3864
3865 handlers = intf->handlers;
3866 if (handlers)
3867 handlers->request_events(intf->send_info);
3868 }
3869 rcu_read_unlock();
3870}
3871
3872static struct timer_list ipmi_timer;
3873
3874
3875#define IPMI_TIMEOUT_TIME 100
3876
3877
3878#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
3879
3880
3881
3882
3883
3884
3885
3886#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
3887
3888static atomic_t stop_operation;
3889static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3890
3891static void ipmi_timeout(unsigned long data)
3892{
3893 if (atomic_read(&stop_operation))
3894 return;
3895
3896 ticks_to_req_ev--;
3897 if (ticks_to_req_ev == 0) {
3898 ipmi_request_event();
3899 ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3900 }
3901
3902 ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
3903
3904 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
3905}
3906
3907
3908static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
3909static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
3910
3911
3912static void free_smi_msg(struct ipmi_smi_msg *msg)
3913{
3914 atomic_dec(&smi_msg_inuse_count);
3915 kfree(msg);
3916}
3917
3918struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
3919{
3920 struct ipmi_smi_msg *rv;
3921 rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
3922 if (rv) {
3923 rv->done = free_smi_msg;
3924 rv->user_data = NULL;
3925 atomic_inc(&smi_msg_inuse_count);
3926 }
3927 return rv;
3928}
3929EXPORT_SYMBOL(ipmi_alloc_smi_msg);
3930
3931static void free_recv_msg(struct ipmi_recv_msg *msg)
3932{
3933 atomic_dec(&recv_msg_inuse_count);
3934 kfree(msg);
3935}
3936
3937static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
3938{
3939 struct ipmi_recv_msg *rv;
3940
3941 rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
3942 if (rv) {
3943 rv->user = NULL;
3944 rv->done = free_recv_msg;
3945 atomic_inc(&recv_msg_inuse_count);
3946 }
3947 return rv;
3948}
3949
3950void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
3951{
3952 if (msg->user)
3953 kref_put(&msg->user->refcount, free_user);
3954 msg->done(msg);
3955}
3956EXPORT_SYMBOL(ipmi_free_recv_msg);
3957
3958#ifdef CONFIG_IPMI_PANIC_EVENT
3959
3960static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
3961{
3962}
3963
3964static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
3965{
3966}
3967
3968#ifdef CONFIG_IPMI_PANIC_STRING
3969static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
3970{
3971 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3972 && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
3973 && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
3974 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
3975
3976 intf->event_receiver = msg->msg.data[1];
3977 intf->event_receiver_lun = msg->msg.data[2] & 0x3;
3978 }
3979}
3980
3981static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
3982{
3983 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3984 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
3985 && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
3986 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
3987
3988
3989
3990
3991 intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
3992 intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
3993 }
3994}
3995#endif
3996
3997static void send_panic_events(char *str)
3998{
3999 struct kernel_ipmi_msg msg;
4000 ipmi_smi_t intf;
4001 unsigned char data[16];
4002 struct ipmi_system_interface_addr *si;
4003 struct ipmi_addr addr;
4004 struct ipmi_smi_msg smi_msg;
4005 struct ipmi_recv_msg recv_msg;
4006
4007 si = (struct ipmi_system_interface_addr *) &addr;
4008 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4009 si->channel = IPMI_BMC_CHANNEL;
4010 si->lun = 0;
4011
4012
4013 msg.netfn = 0x04;
4014 msg.cmd = 2;
4015 msg.data = data;
4016 msg.data_len = 8;
4017 data[0] = 0x41;
4018 data[1] = 0x03;
4019 data[2] = 0x20;
4020 data[4] = 0x6f;
4021 data[5] = 0xa1;
4022
4023
4024
4025
4026
4027 if (str) {
4028 data[3] = str[0];
4029 data[6] = str[1];
4030 data[7] = str[2];
4031 }
4032
4033 smi_msg.done = dummy_smi_done_handler;
4034 recv_msg.done = dummy_recv_done_handler;
4035
4036
4037 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4038 if (!intf->handlers)
4039
4040 continue;
4041
4042 intf->run_to_completion = 1;
4043
4044 intf->handlers->set_run_to_completion(intf->send_info, 1);
4045 i_ipmi_request(NULL,
4046 intf,
4047 &addr,
4048 0,
4049 &msg,
4050 intf,
4051 &smi_msg,
4052 &recv_msg,
4053 0,
4054 intf->channels[0].address,
4055 intf->channels[0].lun,
4056 0, 1);
4057 }
4058
4059#ifdef CONFIG_IPMI_PANIC_STRING
4060
4061
4062
4063
4064 if (!str)
4065 return;
4066
4067
4068 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4069 char *p = str;
4070 struct ipmi_ipmb_addr *ipmb;
4071 int j;
4072
4073 if (intf->intf_num == -1)
4074
4075 continue;
4076
4077
4078
4079
4080
4081
4082
4083 smp_rmb();
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094 intf->local_sel_device = 0;
4095 intf->local_event_generator = 0;
4096 intf->event_receiver = 0;
4097
4098
4099 msg.netfn = IPMI_NETFN_APP_REQUEST;
4100 msg.cmd = IPMI_GET_DEVICE_ID_CMD;
4101 msg.data = NULL;
4102 msg.data_len = 0;
4103 intf->null_user_handler = device_id_fetcher;
4104 i_ipmi_request(NULL,
4105 intf,
4106 &addr,
4107 0,
4108 &msg,
4109 intf,
4110 &smi_msg,
4111 &recv_msg,
4112 0,
4113 intf->channels[0].address,
4114 intf->channels[0].lun,
4115 0, 1);
4116
4117 if (intf->local_event_generator) {
4118
4119 msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
4120 msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
4121 msg.data = NULL;
4122 msg.data_len = 0;
4123 intf->null_user_handler = event_receiver_fetcher;
4124 i_ipmi_request(NULL,
4125 intf,
4126 &addr,
4127 0,
4128 &msg,
4129 intf,
4130 &smi_msg,
4131 &recv_msg,
4132 0,
4133 intf->channels[0].address,
4134 intf->channels[0].lun,
4135 0, 1);
4136 }
4137 intf->null_user_handler = NULL;
4138
4139
4140
4141
4142
4143
4144 if (((intf->event_receiver & 1) == 0)
4145 && (intf->event_receiver != 0)
4146 && (intf->event_receiver != intf->channels[0].address)) {
4147
4148
4149
4150
4151 ipmb = (struct ipmi_ipmb_addr *) &addr;
4152 ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
4153 ipmb->channel = 0;
4154 ipmb->lun = intf->event_receiver_lun;
4155 ipmb->slave_addr = intf->event_receiver;
4156 } else if (intf->local_sel_device) {
4157
4158
4159
4160
4161
4162 si = (struct ipmi_system_interface_addr *) &addr;
4163 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4164 si->channel = IPMI_BMC_CHANNEL;
4165 si->lun = 0;
4166 } else
4167 continue;
4168
4169 msg.netfn = IPMI_NETFN_STORAGE_REQUEST;
4170 msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
4171 msg.data = data;
4172 msg.data_len = 16;
4173
4174 j = 0;
4175 while (*p) {
4176 int size = strlen(p);
4177
4178 if (size > 11)
4179 size = 11;
4180 data[0] = 0;
4181 data[1] = 0;
4182 data[2] = 0xf0;
4183 data[3] = intf->channels[0].address;
4184 data[4] = j++;
4185
4186
4187
4188
4189 strncpy(data+5, p, 11);
4190 p += size;
4191
4192 i_ipmi_request(NULL,
4193 intf,
4194 &addr,
4195 0,
4196 &msg,
4197 intf,
4198 &smi_msg,
4199 &recv_msg,
4200 0,
4201 intf->channels[0].address,
4202 intf->channels[0].lun,
4203 0, 1);
4204 }
4205 }
4206#endif
4207}
4208#endif
4209
4210static int has_panicked;
4211
4212static int panic_event(struct notifier_block *this,
4213 unsigned long event,
4214 void *ptr)
4215{
4216 ipmi_smi_t intf;
4217
4218 if (has_panicked)
4219 return NOTIFY_DONE;
4220 has_panicked = 1;
4221
4222
4223 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4224 if (!intf->handlers)
4225
4226 continue;
4227
4228 intf->run_to_completion = 1;
4229 intf->handlers->set_run_to_completion(intf->send_info, 1);
4230 }
4231
4232#ifdef CONFIG_IPMI_PANIC_EVENT
4233 send_panic_events(ptr);
4234#endif
4235
4236 return NOTIFY_DONE;
4237}
4238
4239static struct notifier_block panic_block = {
4240 .notifier_call = panic_event,
4241 .next = NULL,
4242 .priority = 200
4243};
4244
4245static int ipmi_init_msghandler(void)
4246{
4247 int rv;
4248
4249 if (initialized)
4250 return 0;
4251
4252 rv = driver_register(&ipmidriver.driver);
4253 if (rv) {
4254 printk(KERN_ERR PFX "Could not register IPMI driver\n");
4255 return rv;
4256 }
4257
4258 printk(KERN_INFO "ipmi message handler version "
4259 IPMI_DRIVER_VERSION "\n");
4260
4261#ifdef CONFIG_PROC_FS
4262 proc_ipmi_root = proc_mkdir("ipmi", NULL);
4263 if (!proc_ipmi_root) {
4264 printk(KERN_ERR PFX "Unable to create IPMI proc dir");
4265 return -ENOMEM;
4266 }
4267
4268 proc_ipmi_root->owner = THIS_MODULE;
4269#endif
4270
4271 setup_timer(&ipmi_timer, ipmi_timeout, 0);
4272 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4273
4274 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
4275
4276 initialized = 1;
4277
4278 return 0;
4279}
4280
4281static __init int ipmi_init_msghandler_mod(void)
4282{
4283 ipmi_init_msghandler();
4284 return 0;
4285}
4286
4287static __exit void cleanup_ipmi(void)
4288{
4289 int count;
4290
4291 if (!initialized)
4292 return;
4293
4294 atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306 atomic_inc(&stop_operation);
4307 del_timer_sync(&ipmi_timer);
4308
4309#ifdef CONFIG_PROC_FS
4310 remove_proc_entry(proc_ipmi_root->name, NULL);
4311#endif
4312
4313 driver_unregister(&ipmidriver.driver);
4314
4315 initialized = 0;
4316
4317
4318 count = atomic_read(&smi_msg_inuse_count);
4319 if (count != 0)
4320 printk(KERN_WARNING PFX "SMI message count %d at exit\n",
4321 count);
4322 count = atomic_read(&recv_msg_inuse_count);
4323 if (count != 0)
4324 printk(KERN_WARNING PFX "recv message count %d at exit\n",
4325 count);
4326}
4327module_exit(cleanup_ipmi);
4328
4329module_init(ipmi_init_msghandler_mod);
4330MODULE_LICENSE("GPL");
4331MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
4332MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
4333 " interface.");
4334MODULE_VERSION(IPMI_DRIVER_VERSION);