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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/sched.h>
39#include <linux/spinlock.h>
40#include <linux/mutex.h>
41#include <linux/slab.h>
42#include <linux/ipmi.h>
43#include <linux/ipmi_smi.h>
44#include <linux/notifier.h>
45#include <linux/init.h>
46#include <linux/proc_fs.h>
47#include <linux/rcupdate.h>
48
49#define PFX "IPMI message handler: "
50
51#define IPMI_DRIVER_VERSION "39.2"
52
53static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
54static int ipmi_init_msghandler(void);
55
56static int initialized;
57
58#ifdef CONFIG_PROC_FS
59static struct proc_dir_entry *proc_ipmi_root;
60#endif
61
62
63#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
64
65#define MAX_EVENTS_IN_QUEUE 25
66
67
68
69
70
71#define MAX_MSG_TIMEOUT 60000
72
73
74
75
76struct ipmi_user {
77 struct list_head link;
78
79
80 int valid;
81
82 struct kref refcount;
83
84
85 struct ipmi_user_hndl *handler;
86 void *handler_data;
87
88
89 ipmi_smi_t intf;
90
91
92 int gets_events;
93};
94
95struct cmd_rcvr {
96 struct list_head link;
97
98 ipmi_user_t user;
99 unsigned char netfn;
100 unsigned char cmd;
101 unsigned int chans;
102
103
104
105
106
107
108
109
110
111 struct cmd_rcvr *next;
112};
113
114struct seq_table {
115 unsigned int inuse : 1;
116 unsigned int broadcast : 1;
117
118 unsigned long timeout;
119 unsigned long orig_timeout;
120 unsigned int retries_left;
121
122
123
124
125
126
127 long seqid;
128
129
130
131
132
133
134 struct ipmi_recv_msg *recv_msg;
135};
136
137
138
139
140
141#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
142
143#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
144 do { \
145 seq = ((msgid >> 26) & 0x3f); \
146 seqid = (msgid & 0x3fffff); \
147 } while (0)
148
149#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
150
151struct ipmi_channel {
152 unsigned char medium;
153 unsigned char protocol;
154
155
156
157
158
159 unsigned char address;
160
161
162
163
164
165 unsigned char lun;
166};
167
168#ifdef CONFIG_PROC_FS
169struct ipmi_proc_entry {
170 char *name;
171 struct ipmi_proc_entry *next;
172};
173#endif
174
175struct bmc_device {
176 struct platform_device *dev;
177 struct ipmi_device_id id;
178 unsigned char guid[16];
179 int guid_set;
180
181 struct kref refcount;
182
183
184 struct device_attribute device_id_attr;
185 struct device_attribute provides_dev_sdrs_attr;
186 struct device_attribute revision_attr;
187 struct device_attribute firmware_rev_attr;
188 struct device_attribute version_attr;
189 struct device_attribute add_dev_support_attr;
190 struct device_attribute manufacturer_id_attr;
191 struct device_attribute product_id_attr;
192 struct device_attribute guid_attr;
193 struct device_attribute aux_firmware_rev_attr;
194};
195
196
197
198
199
200enum ipmi_stat_indexes {
201
202 IPMI_STAT_sent_invalid_commands = 0,
203
204
205 IPMI_STAT_sent_local_commands,
206
207
208 IPMI_STAT_handled_local_responses,
209
210
211 IPMI_STAT_unhandled_local_responses,
212
213
214 IPMI_STAT_sent_ipmb_commands,
215
216
217 IPMI_STAT_sent_ipmb_command_errs,
218
219
220 IPMI_STAT_retransmitted_ipmb_commands,
221
222
223
224
225
226 IPMI_STAT_timed_out_ipmb_commands,
227
228
229
230
231
232
233 IPMI_STAT_timed_out_ipmb_broadcasts,
234
235
236 IPMI_STAT_sent_ipmb_responses,
237
238
239 IPMI_STAT_handled_ipmb_responses,
240
241
242 IPMI_STAT_invalid_ipmb_responses,
243
244
245 IPMI_STAT_unhandled_ipmb_responses,
246
247
248 IPMI_STAT_sent_lan_commands,
249
250
251 IPMI_STAT_sent_lan_command_errs,
252
253
254 IPMI_STAT_retransmitted_lan_commands,
255
256
257
258
259
260 IPMI_STAT_timed_out_lan_commands,
261
262
263 IPMI_STAT_sent_lan_responses,
264
265
266 IPMI_STAT_handled_lan_responses,
267
268
269 IPMI_STAT_invalid_lan_responses,
270
271
272 IPMI_STAT_unhandled_lan_responses,
273
274
275 IPMI_STAT_handled_commands,
276
277
278 IPMI_STAT_invalid_commands,
279
280
281 IPMI_STAT_unhandled_commands,
282
283
284 IPMI_STAT_invalid_events,
285
286
287 IPMI_STAT_events,
288
289
290 IPMI_STAT_dropped_rexmit_ipmb_commands,
291
292
293 IPMI_STAT_dropped_rexmit_lan_commands,
294
295
296 IPMI_NUM_STATS
297};
298
299
300#define IPMI_IPMB_NUM_SEQ 64
301#define IPMI_MAX_CHANNELS 16
302struct ipmi_smi {
303
304 int intf_num;
305
306 struct kref refcount;
307
308
309 struct list_head link;
310
311
312
313
314
315 struct list_head users;
316
317
318 unsigned char ipmi_version_major;
319 unsigned char ipmi_version_minor;
320
321
322 wait_queue_head_t waitq;
323
324 struct bmc_device *bmc;
325 char *my_dev_name;
326 char *sysfs_name;
327
328
329
330
331
332
333
334 struct ipmi_smi_handlers *handlers;
335 void *send_info;
336
337#ifdef CONFIG_PROC_FS
338
339 struct mutex proc_entry_lock;
340 struct ipmi_proc_entry *proc_entries;
341#endif
342
343
344 struct device *si_dev;
345
346
347
348
349
350
351
352 spinlock_t seq_lock;
353 struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
354 int curr_seq;
355
356
357
358
359
360
361 spinlock_t waiting_msgs_lock;
362 struct list_head waiting_msgs;
363
364
365
366
367
368 struct mutex cmd_rcvrs_mutex;
369 struct list_head cmd_rcvrs;
370
371
372
373
374
375 spinlock_t events_lock;
376 struct list_head waiting_events;
377 unsigned int waiting_events_count;
378 char delivering_events;
379 char event_msg_printed;
380
381
382
383
384
385 unsigned char event_receiver;
386 unsigned char event_receiver_lun;
387 unsigned char local_sel_device;
388 unsigned char local_event_generator;
389
390
391 int maintenance_mode;
392 int maintenance_mode_enable;
393 int auto_maintenance_timeout;
394 spinlock_t maintenance_mode_lock;
395
396
397
398
399
400
401
402 void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
403
404
405
406
407
408 int curr_channel;
409
410
411 struct ipmi_channel channels[IPMI_MAX_CHANNELS];
412
413
414 struct proc_dir_entry *proc_dir;
415 char proc_dir_name[10];
416
417 atomic_t stats[IPMI_NUM_STATS];
418
419
420
421
422
423
424 int run_to_completion;
425};
426#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
427
428
429
430
431static struct platform_driver ipmidriver = {
432 .driver = {
433 .name = "ipmi",
434 .bus = &platform_bus_type
435 }
436};
437static DEFINE_MUTEX(ipmidriver_mutex);
438
439static LIST_HEAD(ipmi_interfaces);
440static DEFINE_MUTEX(ipmi_interfaces_mutex);
441
442
443
444
445static LIST_HEAD(smi_watchers);
446static DEFINE_MUTEX(smi_watchers_mutex);
447
448
449#define ipmi_inc_stat(intf, stat) \
450 atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
451#define ipmi_get_stat(intf, stat) \
452 ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
453
454static int is_lan_addr(struct ipmi_addr *addr)
455{
456 return addr->addr_type == IPMI_LAN_ADDR_TYPE;
457}
458
459static int is_ipmb_addr(struct ipmi_addr *addr)
460{
461 return addr->addr_type == IPMI_IPMB_ADDR_TYPE;
462}
463
464static int is_ipmb_bcast_addr(struct ipmi_addr *addr)
465{
466 return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE;
467}
468
469static void free_recv_msg_list(struct list_head *q)
470{
471 struct ipmi_recv_msg *msg, *msg2;
472
473 list_for_each_entry_safe(msg, msg2, q, link) {
474 list_del(&msg->link);
475 ipmi_free_recv_msg(msg);
476 }
477}
478
479static void free_smi_msg_list(struct list_head *q)
480{
481 struct ipmi_smi_msg *msg, *msg2;
482
483 list_for_each_entry_safe(msg, msg2, q, link) {
484 list_del(&msg->link);
485 ipmi_free_smi_msg(msg);
486 }
487}
488
489static void clean_up_interface_data(ipmi_smi_t intf)
490{
491 int i;
492 struct cmd_rcvr *rcvr, *rcvr2;
493 struct list_head list;
494
495 free_smi_msg_list(&intf->waiting_msgs);
496 free_recv_msg_list(&intf->waiting_events);
497
498
499
500
501
502 mutex_lock(&intf->cmd_rcvrs_mutex);
503 INIT_LIST_HEAD(&list);
504 list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
505 mutex_unlock(&intf->cmd_rcvrs_mutex);
506
507 list_for_each_entry_safe(rcvr, rcvr2, &list, link)
508 kfree(rcvr);
509
510 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
511 if ((intf->seq_table[i].inuse)
512 && (intf->seq_table[i].recv_msg))
513 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
514 }
515}
516
517static void intf_free(struct kref *ref)
518{
519 ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
520
521 clean_up_interface_data(intf);
522 kfree(intf);
523}
524
525struct watcher_entry {
526 int intf_num;
527 ipmi_smi_t intf;
528 struct list_head link;
529};
530
531int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
532{
533 ipmi_smi_t intf;
534 LIST_HEAD(to_deliver);
535 struct watcher_entry *e, *e2;
536
537 mutex_lock(&smi_watchers_mutex);
538
539 mutex_lock(&ipmi_interfaces_mutex);
540
541
542 list_for_each_entry(intf, &ipmi_interfaces, link) {
543 if (intf->intf_num == -1)
544 continue;
545 e = kmalloc(sizeof(*e), GFP_KERNEL);
546 if (!e)
547 goto out_err;
548 kref_get(&intf->refcount);
549 e->intf = intf;
550 e->intf_num = intf->intf_num;
551 list_add_tail(&e->link, &to_deliver);
552 }
553
554
555 list_add(&watcher->link, &smi_watchers);
556
557 mutex_unlock(&ipmi_interfaces_mutex);
558
559 list_for_each_entry_safe(e, e2, &to_deliver, link) {
560 list_del(&e->link);
561 watcher->new_smi(e->intf_num, e->intf->si_dev);
562 kref_put(&e->intf->refcount, intf_free);
563 kfree(e);
564 }
565
566 mutex_unlock(&smi_watchers_mutex);
567
568 return 0;
569
570 out_err:
571 mutex_unlock(&ipmi_interfaces_mutex);
572 mutex_unlock(&smi_watchers_mutex);
573 list_for_each_entry_safe(e, e2, &to_deliver, link) {
574 list_del(&e->link);
575 kref_put(&e->intf->refcount, intf_free);
576 kfree(e);
577 }
578 return -ENOMEM;
579}
580EXPORT_SYMBOL(ipmi_smi_watcher_register);
581
582int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
583{
584 mutex_lock(&smi_watchers_mutex);
585 list_del(&(watcher->link));
586 mutex_unlock(&smi_watchers_mutex);
587 return 0;
588}
589EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
590
591
592
593
594static void
595call_smi_watchers(int i, struct device *dev)
596{
597 struct ipmi_smi_watcher *w;
598
599 list_for_each_entry(w, &smi_watchers, link) {
600 if (try_module_get(w->owner)) {
601 w->new_smi(i, dev);
602 module_put(w->owner);
603 }
604 }
605}
606
607static int
608ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
609{
610 if (addr1->addr_type != addr2->addr_type)
611 return 0;
612
613 if (addr1->channel != addr2->channel)
614 return 0;
615
616 if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
617 struct ipmi_system_interface_addr *smi_addr1
618 = (struct ipmi_system_interface_addr *) addr1;
619 struct ipmi_system_interface_addr *smi_addr2
620 = (struct ipmi_system_interface_addr *) addr2;
621 return (smi_addr1->lun == smi_addr2->lun);
622 }
623
624 if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) {
625 struct ipmi_ipmb_addr *ipmb_addr1
626 = (struct ipmi_ipmb_addr *) addr1;
627 struct ipmi_ipmb_addr *ipmb_addr2
628 = (struct ipmi_ipmb_addr *) addr2;
629
630 return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
631 && (ipmb_addr1->lun == ipmb_addr2->lun));
632 }
633
634 if (is_lan_addr(addr1)) {
635 struct ipmi_lan_addr *lan_addr1
636 = (struct ipmi_lan_addr *) addr1;
637 struct ipmi_lan_addr *lan_addr2
638 = (struct ipmi_lan_addr *) addr2;
639
640 return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
641 && (lan_addr1->local_SWID == lan_addr2->local_SWID)
642 && (lan_addr1->session_handle
643 == lan_addr2->session_handle)
644 && (lan_addr1->lun == lan_addr2->lun));
645 }
646
647 return 1;
648}
649
650int ipmi_validate_addr(struct ipmi_addr *addr, int len)
651{
652 if (len < sizeof(struct ipmi_system_interface_addr))
653 return -EINVAL;
654
655 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
656 if (addr->channel != IPMI_BMC_CHANNEL)
657 return -EINVAL;
658 return 0;
659 }
660
661 if ((addr->channel == IPMI_BMC_CHANNEL)
662 || (addr->channel >= IPMI_MAX_CHANNELS)
663 || (addr->channel < 0))
664 return -EINVAL;
665
666 if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
667 if (len < sizeof(struct ipmi_ipmb_addr))
668 return -EINVAL;
669 return 0;
670 }
671
672 if (is_lan_addr(addr)) {
673 if (len < sizeof(struct ipmi_lan_addr))
674 return -EINVAL;
675 return 0;
676 }
677
678 return -EINVAL;
679}
680EXPORT_SYMBOL(ipmi_validate_addr);
681
682unsigned int ipmi_addr_length(int addr_type)
683{
684 if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
685 return sizeof(struct ipmi_system_interface_addr);
686
687 if ((addr_type == IPMI_IPMB_ADDR_TYPE)
688 || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
689 return sizeof(struct ipmi_ipmb_addr);
690
691 if (addr_type == IPMI_LAN_ADDR_TYPE)
692 return sizeof(struct ipmi_lan_addr);
693
694 return 0;
695}
696EXPORT_SYMBOL(ipmi_addr_length);
697
698static void deliver_response(struct ipmi_recv_msg *msg)
699{
700 if (!msg->user) {
701 ipmi_smi_t intf = msg->user_msg_data;
702
703
704 if (intf->null_user_handler) {
705 intf->null_user_handler(intf, msg);
706 ipmi_inc_stat(intf, handled_local_responses);
707 } else {
708
709 ipmi_inc_stat(intf, unhandled_local_responses);
710 }
711 ipmi_free_recv_msg(msg);
712 } else {
713 ipmi_user_t user = msg->user;
714 user->handler->ipmi_recv_hndl(msg, user->handler_data);
715 }
716}
717
718static void
719deliver_err_response(struct ipmi_recv_msg *msg, int err)
720{
721 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
722 msg->msg_data[0] = err;
723 msg->msg.netfn |= 1;
724 msg->msg.data_len = 1;
725 msg->msg.data = msg->msg_data;
726 deliver_response(msg);
727}
728
729
730
731
732
733
734static int intf_next_seq(ipmi_smi_t intf,
735 struct ipmi_recv_msg *recv_msg,
736 unsigned long timeout,
737 int retries,
738 int broadcast,
739 unsigned char *seq,
740 long *seqid)
741{
742 int rv = 0;
743 unsigned int i;
744
745 for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
746 i = (i+1)%IPMI_IPMB_NUM_SEQ) {
747 if (!intf->seq_table[i].inuse)
748 break;
749 }
750
751 if (!intf->seq_table[i].inuse) {
752 intf->seq_table[i].recv_msg = recv_msg;
753
754
755
756
757
758 intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
759 intf->seq_table[i].orig_timeout = timeout;
760 intf->seq_table[i].retries_left = retries;
761 intf->seq_table[i].broadcast = broadcast;
762 intf->seq_table[i].inuse = 1;
763 intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
764 *seq = i;
765 *seqid = intf->seq_table[i].seqid;
766 intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
767 } else {
768 rv = -EAGAIN;
769 }
770
771 return rv;
772}
773
774
775
776
777
778
779
780
781static int intf_find_seq(ipmi_smi_t intf,
782 unsigned char seq,
783 short channel,
784 unsigned char cmd,
785 unsigned char netfn,
786 struct ipmi_addr *addr,
787 struct ipmi_recv_msg **recv_msg)
788{
789 int rv = -ENODEV;
790 unsigned long flags;
791
792 if (seq >= IPMI_IPMB_NUM_SEQ)
793 return -EINVAL;
794
795 spin_lock_irqsave(&(intf->seq_lock), flags);
796 if (intf->seq_table[seq].inuse) {
797 struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
798
799 if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
800 && (msg->msg.netfn == netfn)
801 && (ipmi_addr_equal(addr, &(msg->addr)))) {
802 *recv_msg = msg;
803 intf->seq_table[seq].inuse = 0;
804 rv = 0;
805 }
806 }
807 spin_unlock_irqrestore(&(intf->seq_lock), flags);
808
809 return rv;
810}
811
812
813
814static int intf_start_seq_timer(ipmi_smi_t intf,
815 long msgid)
816{
817 int rv = -ENODEV;
818 unsigned long flags;
819 unsigned char seq;
820 unsigned long seqid;
821
822
823 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
824
825 spin_lock_irqsave(&(intf->seq_lock), flags);
826
827
828
829
830 if ((intf->seq_table[seq].inuse)
831 && (intf->seq_table[seq].seqid == seqid)) {
832 struct seq_table *ent = &(intf->seq_table[seq]);
833 ent->timeout = ent->orig_timeout;
834 rv = 0;
835 }
836 spin_unlock_irqrestore(&(intf->seq_lock), flags);
837
838 return rv;
839}
840
841
842static int intf_err_seq(ipmi_smi_t intf,
843 long msgid,
844 unsigned int err)
845{
846 int rv = -ENODEV;
847 unsigned long flags;
848 unsigned char seq;
849 unsigned long seqid;
850 struct ipmi_recv_msg *msg = NULL;
851
852
853 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
854
855 spin_lock_irqsave(&(intf->seq_lock), flags);
856
857
858
859
860 if ((intf->seq_table[seq].inuse)
861 && (intf->seq_table[seq].seqid == seqid)) {
862 struct seq_table *ent = &(intf->seq_table[seq]);
863
864 ent->inuse = 0;
865 msg = ent->recv_msg;
866 rv = 0;
867 }
868 spin_unlock_irqrestore(&(intf->seq_lock), flags);
869
870 if (msg)
871 deliver_err_response(msg, err);
872
873 return rv;
874}
875
876
877int ipmi_create_user(unsigned int if_num,
878 struct ipmi_user_hndl *handler,
879 void *handler_data,
880 ipmi_user_t *user)
881{
882 unsigned long flags;
883 ipmi_user_t new_user;
884 int rv = 0;
885 ipmi_smi_t intf;
886
887
888
889
890
891
892
893
894
895 if (handler == NULL)
896 return -EINVAL;
897
898
899
900
901
902 if (!initialized) {
903 rv = ipmi_init_msghandler();
904 if (rv)
905 return rv;
906
907
908
909
910
911 if (!initialized)
912 return -ENODEV;
913 }
914
915 new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
916 if (!new_user)
917 return -ENOMEM;
918
919 mutex_lock(&ipmi_interfaces_mutex);
920 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
921 if (intf->intf_num == if_num)
922 goto found;
923 }
924
925 rv = -EINVAL;
926 goto out_kfree;
927
928 found:
929
930 kref_get(&intf->refcount);
931
932 kref_init(&new_user->refcount);
933 new_user->handler = handler;
934 new_user->handler_data = handler_data;
935 new_user->intf = intf;
936 new_user->gets_events = 0;
937
938 if (!try_module_get(intf->handlers->owner)) {
939 rv = -ENODEV;
940 goto out_kref;
941 }
942
943 if (intf->handlers->inc_usecount) {
944 rv = intf->handlers->inc_usecount(intf->send_info);
945 if (rv) {
946 module_put(intf->handlers->owner);
947 goto out_kref;
948 }
949 }
950
951
952
953
954
955 mutex_unlock(&ipmi_interfaces_mutex);
956
957 new_user->valid = 1;
958 spin_lock_irqsave(&intf->seq_lock, flags);
959 list_add_rcu(&new_user->link, &intf->users);
960 spin_unlock_irqrestore(&intf->seq_lock, flags);
961 *user = new_user;
962 return 0;
963
964out_kref:
965 kref_put(&intf->refcount, intf_free);
966out_kfree:
967 mutex_unlock(&ipmi_interfaces_mutex);
968 kfree(new_user);
969 return rv;
970}
971EXPORT_SYMBOL(ipmi_create_user);
972
973static void free_user(struct kref *ref)
974{
975 ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
976 kfree(user);
977}
978
979int ipmi_destroy_user(ipmi_user_t user)
980{
981 ipmi_smi_t intf = user->intf;
982 int i;
983 unsigned long flags;
984 struct cmd_rcvr *rcvr;
985 struct cmd_rcvr *rcvrs = NULL;
986
987 user->valid = 0;
988
989
990 spin_lock_irqsave(&intf->seq_lock, flags);
991 list_del_rcu(&user->link);
992
993 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
994 if (intf->seq_table[i].inuse
995 && (intf->seq_table[i].recv_msg->user == user)) {
996 intf->seq_table[i].inuse = 0;
997 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
998 }
999 }
1000 spin_unlock_irqrestore(&intf->seq_lock, flags);
1001
1002
1003
1004
1005
1006
1007
1008 mutex_lock(&intf->cmd_rcvrs_mutex);
1009 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1010 if (rcvr->user == user) {
1011 list_del_rcu(&rcvr->link);
1012 rcvr->next = rcvrs;
1013 rcvrs = rcvr;
1014 }
1015 }
1016 mutex_unlock(&intf->cmd_rcvrs_mutex);
1017 synchronize_rcu();
1018 while (rcvrs) {
1019 rcvr = rcvrs;
1020 rcvrs = rcvr->next;
1021 kfree(rcvr);
1022 }
1023
1024 mutex_lock(&ipmi_interfaces_mutex);
1025 if (intf->handlers) {
1026 module_put(intf->handlers->owner);
1027 if (intf->handlers->dec_usecount)
1028 intf->handlers->dec_usecount(intf->send_info);
1029 }
1030 mutex_unlock(&ipmi_interfaces_mutex);
1031
1032 kref_put(&intf->refcount, intf_free);
1033
1034 kref_put(&user->refcount, free_user);
1035
1036 return 0;
1037}
1038EXPORT_SYMBOL(ipmi_destroy_user);
1039
1040void ipmi_get_version(ipmi_user_t user,
1041 unsigned char *major,
1042 unsigned char *minor)
1043{
1044 *major = user->intf->ipmi_version_major;
1045 *minor = user->intf->ipmi_version_minor;
1046}
1047EXPORT_SYMBOL(ipmi_get_version);
1048
1049int ipmi_set_my_address(ipmi_user_t user,
1050 unsigned int channel,
1051 unsigned char address)
1052{
1053 if (channel >= IPMI_MAX_CHANNELS)
1054 return -EINVAL;
1055 user->intf->channels[channel].address = address;
1056 return 0;
1057}
1058EXPORT_SYMBOL(ipmi_set_my_address);
1059
1060int ipmi_get_my_address(ipmi_user_t user,
1061 unsigned int channel,
1062 unsigned char *address)
1063{
1064 if (channel >= IPMI_MAX_CHANNELS)
1065 return -EINVAL;
1066 *address = user->intf->channels[channel].address;
1067 return 0;
1068}
1069EXPORT_SYMBOL(ipmi_get_my_address);
1070
1071int ipmi_set_my_LUN(ipmi_user_t user,
1072 unsigned int channel,
1073 unsigned char LUN)
1074{
1075 if (channel >= IPMI_MAX_CHANNELS)
1076 return -EINVAL;
1077 user->intf->channels[channel].lun = LUN & 0x3;
1078 return 0;
1079}
1080EXPORT_SYMBOL(ipmi_set_my_LUN);
1081
1082int ipmi_get_my_LUN(ipmi_user_t user,
1083 unsigned int channel,
1084 unsigned char *address)
1085{
1086 if (channel >= IPMI_MAX_CHANNELS)
1087 return -EINVAL;
1088 *address = user->intf->channels[channel].lun;
1089 return 0;
1090}
1091EXPORT_SYMBOL(ipmi_get_my_LUN);
1092
1093int ipmi_get_maintenance_mode(ipmi_user_t user)
1094{
1095 int mode;
1096 unsigned long flags;
1097
1098 spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
1099 mode = user->intf->maintenance_mode;
1100 spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
1101
1102 return mode;
1103}
1104EXPORT_SYMBOL(ipmi_get_maintenance_mode);
1105
1106static void maintenance_mode_update(ipmi_smi_t intf)
1107{
1108 if (intf->handlers->set_maintenance_mode)
1109 intf->handlers->set_maintenance_mode(
1110 intf->send_info, intf->maintenance_mode_enable);
1111}
1112
1113int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
1114{
1115 int rv = 0;
1116 unsigned long flags;
1117 ipmi_smi_t intf = user->intf;
1118
1119 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1120 if (intf->maintenance_mode != mode) {
1121 switch (mode) {
1122 case IPMI_MAINTENANCE_MODE_AUTO:
1123 intf->maintenance_mode = mode;
1124 intf->maintenance_mode_enable
1125 = (intf->auto_maintenance_timeout > 0);
1126 break;
1127
1128 case IPMI_MAINTENANCE_MODE_OFF:
1129 intf->maintenance_mode = mode;
1130 intf->maintenance_mode_enable = 0;
1131 break;
1132
1133 case IPMI_MAINTENANCE_MODE_ON:
1134 intf->maintenance_mode = mode;
1135 intf->maintenance_mode_enable = 1;
1136 break;
1137
1138 default:
1139 rv = -EINVAL;
1140 goto out_unlock;
1141 }
1142
1143 maintenance_mode_update(intf);
1144 }
1145 out_unlock:
1146 spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
1147
1148 return rv;
1149}
1150EXPORT_SYMBOL(ipmi_set_maintenance_mode);
1151
1152int ipmi_set_gets_events(ipmi_user_t user, int val)
1153{
1154 unsigned long flags;
1155 ipmi_smi_t intf = user->intf;
1156 struct ipmi_recv_msg *msg, *msg2;
1157 struct list_head msgs;
1158
1159 INIT_LIST_HEAD(&msgs);
1160
1161 spin_lock_irqsave(&intf->events_lock, flags);
1162 user->gets_events = val;
1163
1164 if (intf->delivering_events)
1165
1166
1167
1168
1169 goto out;
1170
1171
1172 while (user->gets_events && !list_empty(&intf->waiting_events)) {
1173 list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
1174 list_move_tail(&msg->link, &msgs);
1175 intf->waiting_events_count = 0;
1176 if (intf->event_msg_printed) {
1177 printk(KERN_WARNING PFX "Event queue no longer"
1178 " full\n");
1179 intf->event_msg_printed = 0;
1180 }
1181
1182 intf->delivering_events = 1;
1183 spin_unlock_irqrestore(&intf->events_lock, flags);
1184
1185 list_for_each_entry_safe(msg, msg2, &msgs, link) {
1186 msg->user = user;
1187 kref_get(&user->refcount);
1188 deliver_response(msg);
1189 }
1190
1191 spin_lock_irqsave(&intf->events_lock, flags);
1192 intf->delivering_events = 0;
1193 }
1194
1195 out:
1196 spin_unlock_irqrestore(&intf->events_lock, flags);
1197
1198 return 0;
1199}
1200EXPORT_SYMBOL(ipmi_set_gets_events);
1201
1202static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
1203 unsigned char netfn,
1204 unsigned char cmd,
1205 unsigned char chan)
1206{
1207 struct cmd_rcvr *rcvr;
1208
1209 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1210 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1211 && (rcvr->chans & (1 << chan)))
1212 return rcvr;
1213 }
1214 return NULL;
1215}
1216
1217static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
1218 unsigned char netfn,
1219 unsigned char cmd,
1220 unsigned int chans)
1221{
1222 struct cmd_rcvr *rcvr;
1223
1224 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1225 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1226 && (rcvr->chans & chans))
1227 return 0;
1228 }
1229 return 1;
1230}
1231
1232int ipmi_register_for_cmd(ipmi_user_t user,
1233 unsigned char netfn,
1234 unsigned char cmd,
1235 unsigned int chans)
1236{
1237 ipmi_smi_t intf = user->intf;
1238 struct cmd_rcvr *rcvr;
1239 int rv = 0;
1240
1241
1242 rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
1243 if (!rcvr)
1244 return -ENOMEM;
1245 rcvr->cmd = cmd;
1246 rcvr->netfn = netfn;
1247 rcvr->chans = chans;
1248 rcvr->user = user;
1249
1250 mutex_lock(&intf->cmd_rcvrs_mutex);
1251
1252 if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
1253 rv = -EBUSY;
1254 goto out_unlock;
1255 }
1256
1257 list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1258
1259 out_unlock:
1260 mutex_unlock(&intf->cmd_rcvrs_mutex);
1261 if (rv)
1262 kfree(rcvr);
1263
1264 return rv;
1265}
1266EXPORT_SYMBOL(ipmi_register_for_cmd);
1267
1268int ipmi_unregister_for_cmd(ipmi_user_t user,
1269 unsigned char netfn,
1270 unsigned char cmd,
1271 unsigned int chans)
1272{
1273 ipmi_smi_t intf = user->intf;
1274 struct cmd_rcvr *rcvr;
1275 struct cmd_rcvr *rcvrs = NULL;
1276 int i, rv = -ENOENT;
1277
1278 mutex_lock(&intf->cmd_rcvrs_mutex);
1279 for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
1280 if (((1 << i) & chans) == 0)
1281 continue;
1282 rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
1283 if (rcvr == NULL)
1284 continue;
1285 if (rcvr->user == user) {
1286 rv = 0;
1287 rcvr->chans &= ~chans;
1288 if (rcvr->chans == 0) {
1289 list_del_rcu(&rcvr->link);
1290 rcvr->next = rcvrs;
1291 rcvrs = rcvr;
1292 }
1293 }
1294 }
1295 mutex_unlock(&intf->cmd_rcvrs_mutex);
1296 synchronize_rcu();
1297 while (rcvrs) {
1298 rcvr = rcvrs;
1299 rcvrs = rcvr->next;
1300 kfree(rcvr);
1301 }
1302 return rv;
1303}
1304EXPORT_SYMBOL(ipmi_unregister_for_cmd);
1305
1306static unsigned char
1307ipmb_checksum(unsigned char *data, int size)
1308{
1309 unsigned char csum = 0;
1310
1311 for (; size > 0; size--, data++)
1312 csum += *data;
1313
1314 return -csum;
1315}
1316
1317static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1318 struct kernel_ipmi_msg *msg,
1319 struct ipmi_ipmb_addr *ipmb_addr,
1320 long msgid,
1321 unsigned char ipmb_seq,
1322 int broadcast,
1323 unsigned char source_address,
1324 unsigned char source_lun)
1325{
1326 int i = broadcast;
1327
1328
1329 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1330 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1331 smi_msg->data[2] = ipmb_addr->channel;
1332 if (broadcast)
1333 smi_msg->data[3] = 0;
1334 smi_msg->data[i+3] = ipmb_addr->slave_addr;
1335 smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1336 smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1337 smi_msg->data[i+6] = source_address;
1338 smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1339 smi_msg->data[i+8] = msg->cmd;
1340
1341
1342 if (msg->data_len > 0)
1343 memcpy(&(smi_msg->data[i+9]), msg->data,
1344 msg->data_len);
1345 smi_msg->data_size = msg->data_len + 9;
1346
1347
1348 smi_msg->data[i+smi_msg->data_size]
1349 = ipmb_checksum(&(smi_msg->data[i+6]),
1350 smi_msg->data_size-6);
1351
1352
1353
1354
1355
1356 smi_msg->data_size += 1 + i;
1357
1358 smi_msg->msgid = msgid;
1359}
1360
1361static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1362 struct kernel_ipmi_msg *msg,
1363 struct ipmi_lan_addr *lan_addr,
1364 long msgid,
1365 unsigned char ipmb_seq,
1366 unsigned char source_lun)
1367{
1368
1369 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1370 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1371 smi_msg->data[2] = lan_addr->channel;
1372 smi_msg->data[3] = lan_addr->session_handle;
1373 smi_msg->data[4] = lan_addr->remote_SWID;
1374 smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1375 smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1376 smi_msg->data[7] = lan_addr->local_SWID;
1377 smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1378 smi_msg->data[9] = msg->cmd;
1379
1380
1381 if (msg->data_len > 0)
1382 memcpy(&(smi_msg->data[10]), msg->data,
1383 msg->data_len);
1384 smi_msg->data_size = msg->data_len + 10;
1385
1386
1387 smi_msg->data[smi_msg->data_size]
1388 = ipmb_checksum(&(smi_msg->data[7]),
1389 smi_msg->data_size-7);
1390
1391
1392
1393
1394
1395 smi_msg->data_size += 1;
1396
1397 smi_msg->msgid = msgid;
1398}
1399
1400
1401
1402
1403
1404
1405
1406static int i_ipmi_request(ipmi_user_t user,
1407 ipmi_smi_t intf,
1408 struct ipmi_addr *addr,
1409 long msgid,
1410 struct kernel_ipmi_msg *msg,
1411 void *user_msg_data,
1412 void *supplied_smi,
1413 struct ipmi_recv_msg *supplied_recv,
1414 int priority,
1415 unsigned char source_address,
1416 unsigned char source_lun,
1417 int retries,
1418 unsigned int retry_time_ms)
1419{
1420 int rv = 0;
1421 struct ipmi_smi_msg *smi_msg;
1422 struct ipmi_recv_msg *recv_msg;
1423 unsigned long flags;
1424 struct ipmi_smi_handlers *handlers;
1425
1426
1427 if (supplied_recv)
1428 recv_msg = supplied_recv;
1429 else {
1430 recv_msg = ipmi_alloc_recv_msg();
1431 if (recv_msg == NULL)
1432 return -ENOMEM;
1433 }
1434 recv_msg->user_msg_data = user_msg_data;
1435
1436 if (supplied_smi)
1437 smi_msg = (struct ipmi_smi_msg *) supplied_smi;
1438 else {
1439 smi_msg = ipmi_alloc_smi_msg();
1440 if (smi_msg == NULL) {
1441 ipmi_free_recv_msg(recv_msg);
1442 return -ENOMEM;
1443 }
1444 }
1445
1446 rcu_read_lock();
1447 handlers = intf->handlers;
1448 if (!handlers) {
1449 rv = -ENODEV;
1450 goto out_err;
1451 }
1452
1453 recv_msg->user = user;
1454 if (user)
1455 kref_get(&user->refcount);
1456 recv_msg->msgid = msgid;
1457
1458
1459
1460
1461 recv_msg->msg = *msg;
1462
1463 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1464 struct ipmi_system_interface_addr *smi_addr;
1465
1466 if (msg->netfn & 1) {
1467
1468 rv = -EINVAL;
1469 goto out_err;
1470 }
1471
1472 smi_addr = (struct ipmi_system_interface_addr *) addr;
1473 if (smi_addr->lun > 3) {
1474 ipmi_inc_stat(intf, sent_invalid_commands);
1475 rv = -EINVAL;
1476 goto out_err;
1477 }
1478
1479 memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1480
1481 if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1482 && ((msg->cmd == IPMI_SEND_MSG_CMD)
1483 || (msg->cmd == IPMI_GET_MSG_CMD)
1484 || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
1485
1486
1487
1488
1489 ipmi_inc_stat(intf, sent_invalid_commands);
1490 rv = -EINVAL;
1491 goto out_err;
1492 }
1493
1494 if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
1495 && ((msg->cmd == IPMI_COLD_RESET_CMD)
1496 || (msg->cmd == IPMI_WARM_RESET_CMD)))
1497 || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
1498 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1499 intf->auto_maintenance_timeout
1500 = IPMI_MAINTENANCE_MODE_TIMEOUT;
1501 if (!intf->maintenance_mode
1502 && !intf->maintenance_mode_enable) {
1503 intf->maintenance_mode_enable = 1;
1504 maintenance_mode_update(intf);
1505 }
1506 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
1507 flags);
1508 }
1509
1510 if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
1511 ipmi_inc_stat(intf, sent_invalid_commands);
1512 rv = -EMSGSIZE;
1513 goto out_err;
1514 }
1515
1516 smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1517 smi_msg->data[1] = msg->cmd;
1518 smi_msg->msgid = msgid;
1519 smi_msg->user_data = recv_msg;
1520 if (msg->data_len > 0)
1521 memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1522 smi_msg->data_size = msg->data_len + 2;
1523 ipmi_inc_stat(intf, sent_local_commands);
1524 } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
1525 struct ipmi_ipmb_addr *ipmb_addr;
1526 unsigned char ipmb_seq;
1527 long seqid;
1528 int broadcast = 0;
1529
1530 if (addr->channel >= IPMI_MAX_CHANNELS) {
1531 ipmi_inc_stat(intf, sent_invalid_commands);
1532 rv = -EINVAL;
1533 goto out_err;
1534 }
1535
1536 if (intf->channels[addr->channel].medium
1537 != IPMI_CHANNEL_MEDIUM_IPMB) {
1538 ipmi_inc_stat(intf, sent_invalid_commands);
1539 rv = -EINVAL;
1540 goto out_err;
1541 }
1542
1543 if (retries < 0) {
1544 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1545 retries = 0;
1546 else
1547 retries = 4;
1548 }
1549 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
1550
1551
1552
1553
1554
1555 addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1556 broadcast = 1;
1557 }
1558
1559
1560
1561 if (retry_time_ms == 0)
1562 retry_time_ms = 1000;
1563
1564
1565
1566
1567
1568 if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
1569 ipmi_inc_stat(intf, sent_invalid_commands);
1570 rv = -EMSGSIZE;
1571 goto out_err;
1572 }
1573
1574 ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1575 if (ipmb_addr->lun > 3) {
1576 ipmi_inc_stat(intf, sent_invalid_commands);
1577 rv = -EINVAL;
1578 goto out_err;
1579 }
1580
1581 memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1582
1583 if (recv_msg->msg.netfn & 0x1) {
1584
1585
1586
1587
1588 ipmi_inc_stat(intf, sent_ipmb_responses);
1589 format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1590 msgid, broadcast,
1591 source_address, source_lun);
1592
1593
1594
1595
1596
1597 smi_msg->user_data = recv_msg;
1598 } else {
1599
1600
1601 spin_lock_irqsave(&(intf->seq_lock), flags);
1602
1603
1604
1605
1606
1607 rv = intf_next_seq(intf,
1608 recv_msg,
1609 retry_time_ms,
1610 retries,
1611 broadcast,
1612 &ipmb_seq,
1613 &seqid);
1614 if (rv) {
1615
1616
1617
1618
1619 spin_unlock_irqrestore(&(intf->seq_lock),
1620 flags);
1621 goto out_err;
1622 }
1623
1624 ipmi_inc_stat(intf, sent_ipmb_commands);
1625
1626
1627
1628
1629
1630
1631 format_ipmb_msg(smi_msg, msg, ipmb_addr,
1632 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1633 ipmb_seq, broadcast,
1634 source_address, source_lun);
1635
1636
1637
1638
1639
1640 memcpy(recv_msg->msg_data, smi_msg->data,
1641 smi_msg->data_size);
1642 recv_msg->msg.data = recv_msg->msg_data;
1643 recv_msg->msg.data_len = smi_msg->data_size;
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1654 }
1655 } else if (is_lan_addr(addr)) {
1656 struct ipmi_lan_addr *lan_addr;
1657 unsigned char ipmb_seq;
1658 long seqid;
1659
1660 if (addr->channel >= IPMI_MAX_CHANNELS) {
1661 ipmi_inc_stat(intf, sent_invalid_commands);
1662 rv = -EINVAL;
1663 goto out_err;
1664 }
1665
1666 if ((intf->channels[addr->channel].medium
1667 != IPMI_CHANNEL_MEDIUM_8023LAN)
1668 && (intf->channels[addr->channel].medium
1669 != IPMI_CHANNEL_MEDIUM_ASYNC)) {
1670 ipmi_inc_stat(intf, sent_invalid_commands);
1671 rv = -EINVAL;
1672 goto out_err;
1673 }
1674
1675 retries = 4;
1676
1677
1678 if (retry_time_ms == 0)
1679 retry_time_ms = 1000;
1680
1681
1682 if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
1683 ipmi_inc_stat(intf, sent_invalid_commands);
1684 rv = -EMSGSIZE;
1685 goto out_err;
1686 }
1687
1688 lan_addr = (struct ipmi_lan_addr *) addr;
1689 if (lan_addr->lun > 3) {
1690 ipmi_inc_stat(intf, sent_invalid_commands);
1691 rv = -EINVAL;
1692 goto out_err;
1693 }
1694
1695 memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1696
1697 if (recv_msg->msg.netfn & 0x1) {
1698
1699
1700
1701
1702 ipmi_inc_stat(intf, sent_lan_responses);
1703 format_lan_msg(smi_msg, msg, lan_addr, msgid,
1704 msgid, source_lun);
1705
1706
1707
1708
1709
1710 smi_msg->user_data = recv_msg;
1711 } else {
1712
1713
1714 spin_lock_irqsave(&(intf->seq_lock), flags);
1715
1716
1717
1718
1719
1720 rv = intf_next_seq(intf,
1721 recv_msg,
1722 retry_time_ms,
1723 retries,
1724 0,
1725 &ipmb_seq,
1726 &seqid);
1727 if (rv) {
1728
1729
1730
1731
1732 spin_unlock_irqrestore(&(intf->seq_lock),
1733 flags);
1734 goto out_err;
1735 }
1736
1737 ipmi_inc_stat(intf, sent_lan_commands);
1738
1739
1740
1741
1742
1743
1744 format_lan_msg(smi_msg, msg, lan_addr,
1745 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1746 ipmb_seq, source_lun);
1747
1748
1749
1750
1751
1752 memcpy(recv_msg->msg_data, smi_msg->data,
1753 smi_msg->data_size);
1754 recv_msg->msg.data = recv_msg->msg_data;
1755 recv_msg->msg.data_len = smi_msg->data_size;
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1766 }
1767 } else {
1768
1769 ipmi_inc_stat(intf, sent_invalid_commands);
1770 rv = -EINVAL;
1771 goto out_err;
1772 }
1773
1774#ifdef DEBUG_MSGING
1775 {
1776 int m;
1777 for (m = 0; m < smi_msg->data_size; m++)
1778 printk(" %2.2x", smi_msg->data[m]);
1779 printk("\n");
1780 }
1781#endif
1782
1783 handlers->sender(intf->send_info, smi_msg, priority);
1784 rcu_read_unlock();
1785
1786 return 0;
1787
1788 out_err:
1789 rcu_read_unlock();
1790 ipmi_free_smi_msg(smi_msg);
1791 ipmi_free_recv_msg(recv_msg);
1792 return rv;
1793}
1794
1795static int check_addr(ipmi_smi_t intf,
1796 struct ipmi_addr *addr,
1797 unsigned char *saddr,
1798 unsigned char *lun)
1799{
1800 if (addr->channel >= IPMI_MAX_CHANNELS)
1801 return -EINVAL;
1802 *lun = intf->channels[addr->channel].lun;
1803 *saddr = intf->channels[addr->channel].address;
1804 return 0;
1805}
1806
1807int ipmi_request_settime(ipmi_user_t user,
1808 struct ipmi_addr *addr,
1809 long msgid,
1810 struct kernel_ipmi_msg *msg,
1811 void *user_msg_data,
1812 int priority,
1813 int retries,
1814 unsigned int retry_time_ms)
1815{
1816 unsigned char saddr, lun;
1817 int rv;
1818
1819 if (!user)
1820 return -EINVAL;
1821 rv = check_addr(user->intf, addr, &saddr, &lun);
1822 if (rv)
1823 return rv;
1824 return i_ipmi_request(user,
1825 user->intf,
1826 addr,
1827 msgid,
1828 msg,
1829 user_msg_data,
1830 NULL, NULL,
1831 priority,
1832 saddr,
1833 lun,
1834 retries,
1835 retry_time_ms);
1836}
1837EXPORT_SYMBOL(ipmi_request_settime);
1838
1839int ipmi_request_supply_msgs(ipmi_user_t user,
1840 struct ipmi_addr *addr,
1841 long msgid,
1842 struct kernel_ipmi_msg *msg,
1843 void *user_msg_data,
1844 void *supplied_smi,
1845 struct ipmi_recv_msg *supplied_recv,
1846 int priority)
1847{
1848 unsigned char saddr, lun;
1849 int rv;
1850
1851 if (!user)
1852 return -EINVAL;
1853 rv = check_addr(user->intf, addr, &saddr, &lun);
1854 if (rv)
1855 return rv;
1856 return i_ipmi_request(user,
1857 user->intf,
1858 addr,
1859 msgid,
1860 msg,
1861 user_msg_data,
1862 supplied_smi,
1863 supplied_recv,
1864 priority,
1865 saddr,
1866 lun,
1867 -1, 0);
1868}
1869EXPORT_SYMBOL(ipmi_request_supply_msgs);
1870
1871#ifdef CONFIG_PROC_FS
1872static int ipmb_file_read_proc(char *page, char **start, off_t off,
1873 int count, int *eof, void *data)
1874{
1875 char *out = (char *) page;
1876 ipmi_smi_t intf = data;
1877 int i;
1878 int rv = 0;
1879
1880 for (i = 0; i < IPMI_MAX_CHANNELS; i++)
1881 rv += sprintf(out+rv, "%x ", intf->channels[i].address);
1882 out[rv-1] = '\n';
1883 out[rv] = '\0';
1884 rv++;
1885 return rv;
1886}
1887
1888static int version_file_read_proc(char *page, char **start, off_t off,
1889 int count, int *eof, void *data)
1890{
1891 char *out = (char *) page;
1892 ipmi_smi_t intf = data;
1893
1894 return sprintf(out, "%u.%u\n",
1895 ipmi_version_major(&intf->bmc->id),
1896 ipmi_version_minor(&intf->bmc->id));
1897}
1898
1899static int stat_file_read_proc(char *page, char **start, off_t off,
1900 int count, int *eof, void *data)
1901{
1902 char *out = (char *) page;
1903 ipmi_smi_t intf = data;
1904
1905 out += sprintf(out, "sent_invalid_commands: %u\n",
1906 ipmi_get_stat(intf, sent_invalid_commands));
1907 out += sprintf(out, "sent_local_commands: %u\n",
1908 ipmi_get_stat(intf, sent_local_commands));
1909 out += sprintf(out, "handled_local_responses: %u\n",
1910 ipmi_get_stat(intf, handled_local_responses));
1911 out += sprintf(out, "unhandled_local_responses: %u\n",
1912 ipmi_get_stat(intf, unhandled_local_responses));
1913 out += sprintf(out, "sent_ipmb_commands: %u\n",
1914 ipmi_get_stat(intf, sent_ipmb_commands));
1915 out += sprintf(out, "sent_ipmb_command_errs: %u\n",
1916 ipmi_get_stat(intf, sent_ipmb_command_errs));
1917 out += sprintf(out, "retransmitted_ipmb_commands: %u\n",
1918 ipmi_get_stat(intf, retransmitted_ipmb_commands));
1919 out += sprintf(out, "timed_out_ipmb_commands: %u\n",
1920 ipmi_get_stat(intf, timed_out_ipmb_commands));
1921 out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n",
1922 ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
1923 out += sprintf(out, "sent_ipmb_responses: %u\n",
1924 ipmi_get_stat(intf, sent_ipmb_responses));
1925 out += sprintf(out, "handled_ipmb_responses: %u\n",
1926 ipmi_get_stat(intf, handled_ipmb_responses));
1927 out += sprintf(out, "invalid_ipmb_responses: %u\n",
1928 ipmi_get_stat(intf, invalid_ipmb_responses));
1929 out += sprintf(out, "unhandled_ipmb_responses: %u\n",
1930 ipmi_get_stat(intf, unhandled_ipmb_responses));
1931 out += sprintf(out, "sent_lan_commands: %u\n",
1932 ipmi_get_stat(intf, sent_lan_commands));
1933 out += sprintf(out, "sent_lan_command_errs: %u\n",
1934 ipmi_get_stat(intf, sent_lan_command_errs));
1935 out += sprintf(out, "retransmitted_lan_commands: %u\n",
1936 ipmi_get_stat(intf, retransmitted_lan_commands));
1937 out += sprintf(out, "timed_out_lan_commands: %u\n",
1938 ipmi_get_stat(intf, timed_out_lan_commands));
1939 out += sprintf(out, "sent_lan_responses: %u\n",
1940 ipmi_get_stat(intf, sent_lan_responses));
1941 out += sprintf(out, "handled_lan_responses: %u\n",
1942 ipmi_get_stat(intf, handled_lan_responses));
1943 out += sprintf(out, "invalid_lan_responses: %u\n",
1944 ipmi_get_stat(intf, invalid_lan_responses));
1945 out += sprintf(out, "unhandled_lan_responses: %u\n",
1946 ipmi_get_stat(intf, unhandled_lan_responses));
1947 out += sprintf(out, "handled_commands: %u\n",
1948 ipmi_get_stat(intf, handled_commands));
1949 out += sprintf(out, "invalid_commands: %u\n",
1950 ipmi_get_stat(intf, invalid_commands));
1951 out += sprintf(out, "unhandled_commands: %u\n",
1952 ipmi_get_stat(intf, unhandled_commands));
1953 out += sprintf(out, "invalid_events: %u\n",
1954 ipmi_get_stat(intf, invalid_events));
1955 out += sprintf(out, "events: %u\n",
1956 ipmi_get_stat(intf, events));
1957 out += sprintf(out, "failed rexmit LAN msgs: %u\n",
1958 ipmi_get_stat(intf, dropped_rexmit_lan_commands));
1959 out += sprintf(out, "failed rexmit IPMB msgs: %u\n",
1960 ipmi_get_stat(intf, dropped_rexmit_ipmb_commands));
1961
1962 return (out - ((char *) page));
1963}
1964#endif
1965
1966int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
1967 read_proc_t *read_proc,
1968 void *data)
1969{
1970 int rv = 0;
1971#ifdef CONFIG_PROC_FS
1972 struct proc_dir_entry *file;
1973 struct ipmi_proc_entry *entry;
1974
1975
1976 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1977 if (!entry)
1978 return -ENOMEM;
1979 entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
1980 if (!entry->name) {
1981 kfree(entry);
1982 return -ENOMEM;
1983 }
1984 strcpy(entry->name, name);
1985
1986 file = create_proc_entry(name, 0, smi->proc_dir);
1987 if (!file) {
1988 kfree(entry->name);
1989 kfree(entry);
1990 rv = -ENOMEM;
1991 } else {
1992 file->data = data;
1993 file->read_proc = read_proc;
1994
1995 mutex_lock(&smi->proc_entry_lock);
1996
1997 entry->next = smi->proc_entries;
1998 smi->proc_entries = entry;
1999 mutex_unlock(&smi->proc_entry_lock);
2000 }
2001#endif
2002
2003 return rv;
2004}
2005EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
2006
2007static int add_proc_entries(ipmi_smi_t smi, int num)
2008{
2009 int rv = 0;
2010
2011#ifdef CONFIG_PROC_FS
2012 sprintf(smi->proc_dir_name, "%d", num);
2013 smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
2014 if (!smi->proc_dir)
2015 rv = -ENOMEM;
2016
2017 if (rv == 0)
2018 rv = ipmi_smi_add_proc_entry(smi, "stats",
2019 stat_file_read_proc,
2020 smi);
2021
2022 if (rv == 0)
2023 rv = ipmi_smi_add_proc_entry(smi, "ipmb",
2024 ipmb_file_read_proc,
2025 smi);
2026
2027 if (rv == 0)
2028 rv = ipmi_smi_add_proc_entry(smi, "version",
2029 version_file_read_proc,
2030 smi);
2031#endif
2032
2033 return rv;
2034}
2035
2036static void remove_proc_entries(ipmi_smi_t smi)
2037{
2038#ifdef CONFIG_PROC_FS
2039 struct ipmi_proc_entry *entry;
2040
2041 mutex_lock(&smi->proc_entry_lock);
2042 while (smi->proc_entries) {
2043 entry = smi->proc_entries;
2044 smi->proc_entries = entry->next;
2045
2046 remove_proc_entry(entry->name, smi->proc_dir);
2047 kfree(entry->name);
2048 kfree(entry);
2049 }
2050 mutex_unlock(&smi->proc_entry_lock);
2051 remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
2052#endif
2053}
2054
2055static int __find_bmc_guid(struct device *dev, void *data)
2056{
2057 unsigned char *id = data;
2058 struct bmc_device *bmc = dev_get_drvdata(dev);
2059 return memcmp(bmc->guid, id, 16) == 0;
2060}
2061
2062static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
2063 unsigned char *guid)
2064{
2065 struct device *dev;
2066
2067 dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
2068 if (dev)
2069 return dev_get_drvdata(dev);
2070 else
2071 return NULL;
2072}
2073
2074struct prod_dev_id {
2075 unsigned int product_id;
2076 unsigned char device_id;
2077};
2078
2079static int __find_bmc_prod_dev_id(struct device *dev, void *data)
2080{
2081 struct prod_dev_id *id = data;
2082 struct bmc_device *bmc = dev_get_drvdata(dev);
2083
2084 return (bmc->id.product_id == id->product_id
2085 && bmc->id.device_id == id->device_id);
2086}
2087
2088static struct bmc_device *ipmi_find_bmc_prod_dev_id(
2089 struct device_driver *drv,
2090 unsigned int product_id, unsigned char device_id)
2091{
2092 struct prod_dev_id id = {
2093 .product_id = product_id,
2094 .device_id = device_id,
2095 };
2096 struct device *dev;
2097
2098 dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
2099 if (dev)
2100 return dev_get_drvdata(dev);
2101 else
2102 return NULL;
2103}
2104
2105static ssize_t device_id_show(struct device *dev,
2106 struct device_attribute *attr,
2107 char *buf)
2108{
2109 struct bmc_device *bmc = dev_get_drvdata(dev);
2110
2111 return snprintf(buf, 10, "%u\n", bmc->id.device_id);
2112}
2113
2114static ssize_t provides_dev_sdrs_show(struct device *dev,
2115 struct device_attribute *attr,
2116 char *buf)
2117{
2118 struct bmc_device *bmc = dev_get_drvdata(dev);
2119
2120 return snprintf(buf, 10, "%u\n",
2121 (bmc->id.device_revision & 0x80) >> 7);
2122}
2123
2124static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
2125 char *buf)
2126{
2127 struct bmc_device *bmc = dev_get_drvdata(dev);
2128
2129 return snprintf(buf, 20, "%u\n",
2130 bmc->id.device_revision & 0x0F);
2131}
2132
2133static ssize_t firmware_rev_show(struct device *dev,
2134 struct device_attribute *attr,
2135 char *buf)
2136{
2137 struct bmc_device *bmc = dev_get_drvdata(dev);
2138
2139 return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
2140 bmc->id.firmware_revision_2);
2141}
2142
2143static ssize_t ipmi_version_show(struct device *dev,
2144 struct device_attribute *attr,
2145 char *buf)
2146{
2147 struct bmc_device *bmc = dev_get_drvdata(dev);
2148
2149 return snprintf(buf, 20, "%u.%u\n",
2150 ipmi_version_major(&bmc->id),
2151 ipmi_version_minor(&bmc->id));
2152}
2153
2154static ssize_t add_dev_support_show(struct device *dev,
2155 struct device_attribute *attr,
2156 char *buf)
2157{
2158 struct bmc_device *bmc = dev_get_drvdata(dev);
2159
2160 return snprintf(buf, 10, "0x%02x\n",
2161 bmc->id.additional_device_support);
2162}
2163
2164static ssize_t manufacturer_id_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, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
2171}
2172
2173static ssize_t product_id_show(struct device *dev,
2174 struct device_attribute *attr,
2175 char *buf)
2176{
2177 struct bmc_device *bmc = dev_get_drvdata(dev);
2178
2179 return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
2180}
2181
2182static ssize_t aux_firmware_rev_show(struct device *dev,
2183 struct device_attribute *attr,
2184 char *buf)
2185{
2186 struct bmc_device *bmc = dev_get_drvdata(dev);
2187
2188 return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2189 bmc->id.aux_firmware_revision[3],
2190 bmc->id.aux_firmware_revision[2],
2191 bmc->id.aux_firmware_revision[1],
2192 bmc->id.aux_firmware_revision[0]);
2193}
2194
2195static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
2196 char *buf)
2197{
2198 struct bmc_device *bmc = dev_get_drvdata(dev);
2199
2200 return snprintf(buf, 100, "%Lx%Lx\n",
2201 (long long) bmc->guid[0],
2202 (long long) bmc->guid[8]);
2203}
2204
2205static void remove_files(struct bmc_device *bmc)
2206{
2207 if (!bmc->dev)
2208 return;
2209
2210 device_remove_file(&bmc->dev->dev,
2211 &bmc->device_id_attr);
2212 device_remove_file(&bmc->dev->dev,
2213 &bmc->provides_dev_sdrs_attr);
2214 device_remove_file(&bmc->dev->dev,
2215 &bmc->revision_attr);
2216 device_remove_file(&bmc->dev->dev,
2217 &bmc->firmware_rev_attr);
2218 device_remove_file(&bmc->dev->dev,
2219 &bmc->version_attr);
2220 device_remove_file(&bmc->dev->dev,
2221 &bmc->add_dev_support_attr);
2222 device_remove_file(&bmc->dev->dev,
2223 &bmc->manufacturer_id_attr);
2224 device_remove_file(&bmc->dev->dev,
2225 &bmc->product_id_attr);
2226
2227 if (bmc->id.aux_firmware_revision_set)
2228 device_remove_file(&bmc->dev->dev,
2229 &bmc->aux_firmware_rev_attr);
2230 if (bmc->guid_set)
2231 device_remove_file(&bmc->dev->dev,
2232 &bmc->guid_attr);
2233}
2234
2235static void
2236cleanup_bmc_device(struct kref *ref)
2237{
2238 struct bmc_device *bmc;
2239
2240 bmc = container_of(ref, struct bmc_device, refcount);
2241
2242 remove_files(bmc);
2243 platform_device_unregister(bmc->dev);
2244 kfree(bmc);
2245}
2246
2247static void ipmi_bmc_unregister(ipmi_smi_t intf)
2248{
2249 struct bmc_device *bmc = intf->bmc;
2250
2251 if (intf->sysfs_name) {
2252 sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
2253 kfree(intf->sysfs_name);
2254 intf->sysfs_name = NULL;
2255 }
2256 if (intf->my_dev_name) {
2257 sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
2258 kfree(intf->my_dev_name);
2259 intf->my_dev_name = NULL;
2260 }
2261
2262 mutex_lock(&ipmidriver_mutex);
2263 kref_put(&bmc->refcount, cleanup_bmc_device);
2264 intf->bmc = NULL;
2265 mutex_unlock(&ipmidriver_mutex);
2266}
2267
2268static int create_files(struct bmc_device *bmc)
2269{
2270 int err;
2271
2272 bmc->device_id_attr.attr.name = "device_id";
2273 bmc->device_id_attr.attr.mode = S_IRUGO;
2274 bmc->device_id_attr.show = device_id_show;
2275
2276 bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
2277 bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
2278 bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
2279
2280 bmc->revision_attr.attr.name = "revision";
2281 bmc->revision_attr.attr.mode = S_IRUGO;
2282 bmc->revision_attr.show = revision_show;
2283
2284 bmc->firmware_rev_attr.attr.name = "firmware_revision";
2285 bmc->firmware_rev_attr.attr.mode = S_IRUGO;
2286 bmc->firmware_rev_attr.show = firmware_rev_show;
2287
2288 bmc->version_attr.attr.name = "ipmi_version";
2289 bmc->version_attr.attr.mode = S_IRUGO;
2290 bmc->version_attr.show = ipmi_version_show;
2291
2292 bmc->add_dev_support_attr.attr.name = "additional_device_support";
2293 bmc->add_dev_support_attr.attr.mode = S_IRUGO;
2294 bmc->add_dev_support_attr.show = add_dev_support_show;
2295
2296 bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
2297 bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
2298 bmc->manufacturer_id_attr.show = manufacturer_id_show;
2299
2300 bmc->product_id_attr.attr.name = "product_id";
2301 bmc->product_id_attr.attr.mode = S_IRUGO;
2302 bmc->product_id_attr.show = product_id_show;
2303
2304 bmc->guid_attr.attr.name = "guid";
2305 bmc->guid_attr.attr.mode = S_IRUGO;
2306 bmc->guid_attr.show = guid_show;
2307
2308 bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
2309 bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
2310 bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
2311
2312 err = device_create_file(&bmc->dev->dev,
2313 &bmc->device_id_attr);
2314 if (err)
2315 goto out;
2316 err = device_create_file(&bmc->dev->dev,
2317 &bmc->provides_dev_sdrs_attr);
2318 if (err)
2319 goto out_devid;
2320 err = device_create_file(&bmc->dev->dev,
2321 &bmc->revision_attr);
2322 if (err)
2323 goto out_sdrs;
2324 err = device_create_file(&bmc->dev->dev,
2325 &bmc->firmware_rev_attr);
2326 if (err)
2327 goto out_rev;
2328 err = device_create_file(&bmc->dev->dev,
2329 &bmc->version_attr);
2330 if (err)
2331 goto out_firm;
2332 err = device_create_file(&bmc->dev->dev,
2333 &bmc->add_dev_support_attr);
2334 if (err)
2335 goto out_version;
2336 err = device_create_file(&bmc->dev->dev,
2337 &bmc->manufacturer_id_attr);
2338 if (err)
2339 goto out_add_dev;
2340 err = device_create_file(&bmc->dev->dev,
2341 &bmc->product_id_attr);
2342 if (err)
2343 goto out_manu;
2344 if (bmc->id.aux_firmware_revision_set) {
2345 err = device_create_file(&bmc->dev->dev,
2346 &bmc->aux_firmware_rev_attr);
2347 if (err)
2348 goto out_prod_id;
2349 }
2350 if (bmc->guid_set) {
2351 err = device_create_file(&bmc->dev->dev,
2352 &bmc->guid_attr);
2353 if (err)
2354 goto out_aux_firm;
2355 }
2356
2357 return 0;
2358
2359out_aux_firm:
2360 if (bmc->id.aux_firmware_revision_set)
2361 device_remove_file(&bmc->dev->dev,
2362 &bmc->aux_firmware_rev_attr);
2363out_prod_id:
2364 device_remove_file(&bmc->dev->dev,
2365 &bmc->product_id_attr);
2366out_manu:
2367 device_remove_file(&bmc->dev->dev,
2368 &bmc->manufacturer_id_attr);
2369out_add_dev:
2370 device_remove_file(&bmc->dev->dev,
2371 &bmc->add_dev_support_attr);
2372out_version:
2373 device_remove_file(&bmc->dev->dev,
2374 &bmc->version_attr);
2375out_firm:
2376 device_remove_file(&bmc->dev->dev,
2377 &bmc->firmware_rev_attr);
2378out_rev:
2379 device_remove_file(&bmc->dev->dev,
2380 &bmc->revision_attr);
2381out_sdrs:
2382 device_remove_file(&bmc->dev->dev,
2383 &bmc->provides_dev_sdrs_attr);
2384out_devid:
2385 device_remove_file(&bmc->dev->dev,
2386 &bmc->device_id_attr);
2387out:
2388 return err;
2389}
2390
2391static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
2392 const char *sysfs_name)
2393{
2394 int rv;
2395 struct bmc_device *bmc = intf->bmc;
2396 struct bmc_device *old_bmc;
2397 int size;
2398 char dummy[1];
2399
2400 mutex_lock(&ipmidriver_mutex);
2401
2402
2403
2404
2405
2406 if (bmc->guid_set)
2407 old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid);
2408 else
2409 old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2410 bmc->id.product_id,
2411 bmc->id.device_id);
2412
2413
2414
2415
2416
2417 if (old_bmc) {
2418 kfree(bmc);
2419 intf->bmc = old_bmc;
2420 bmc = old_bmc;
2421
2422 kref_get(&bmc->refcount);
2423 mutex_unlock(&ipmidriver_mutex);
2424
2425 printk(KERN_INFO
2426 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2427 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2428 bmc->id.manufacturer_id,
2429 bmc->id.product_id,
2430 bmc->id.device_id);
2431 } else {
2432 char name[14];
2433 unsigned char orig_dev_id = bmc->id.device_id;
2434 int warn_printed = 0;
2435
2436 snprintf(name, sizeof(name),
2437 "ipmi_bmc.%4.4x", bmc->id.product_id);
2438
2439 while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2440 bmc->id.product_id,
2441 bmc->id.device_id)) {
2442 if (!warn_printed) {
2443 printk(KERN_WARNING PFX
2444 "This machine has two different BMCs"
2445 " with the same product id and device"
2446 " id. This is an error in the"
2447 " firmware, but incrementing the"
2448 " device id to work around the problem."
2449 " Prod ID = 0x%x, Dev ID = 0x%x\n",
2450 bmc->id.product_id, bmc->id.device_id);
2451 warn_printed = 1;
2452 }
2453 bmc->id.device_id++;
2454 if (bmc->id.device_id == orig_dev_id) {
2455 printk(KERN_ERR PFX
2456 "Out of device ids!\n");
2457 break;
2458 }
2459 }
2460
2461 bmc->dev = platform_device_alloc(name, bmc->id.device_id);
2462 if (!bmc->dev) {
2463 mutex_unlock(&ipmidriver_mutex);
2464 printk(KERN_ERR
2465 "ipmi_msghandler:"
2466 " Unable to allocate platform device\n");
2467 return -ENOMEM;
2468 }
2469 bmc->dev->dev.driver = &ipmidriver.driver;
2470 dev_set_drvdata(&bmc->dev->dev, bmc);
2471 kref_init(&bmc->refcount);
2472
2473 rv = platform_device_add(bmc->dev);
2474 mutex_unlock(&ipmidriver_mutex);
2475 if (rv) {
2476 platform_device_put(bmc->dev);
2477 bmc->dev = NULL;
2478 printk(KERN_ERR
2479 "ipmi_msghandler:"
2480 " Unable to register bmc device: %d\n",
2481 rv);
2482
2483
2484
2485
2486 return rv;
2487 }
2488
2489 rv = create_files(bmc);
2490 if (rv) {
2491 mutex_lock(&ipmidriver_mutex);
2492 platform_device_unregister(bmc->dev);
2493 mutex_unlock(&ipmidriver_mutex);
2494
2495 return rv;
2496 }
2497
2498 printk(KERN_INFO
2499 "ipmi: Found new BMC (man_id: 0x%6.6x, "
2500 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2501 bmc->id.manufacturer_id,
2502 bmc->id.product_id,
2503 bmc->id.device_id);
2504 }
2505
2506
2507
2508
2509
2510 intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
2511 if (!intf->sysfs_name) {
2512 rv = -ENOMEM;
2513 printk(KERN_ERR
2514 "ipmi_msghandler: allocate link to BMC: %d\n",
2515 rv);
2516 goto out_err;
2517 }
2518
2519 rv = sysfs_create_link(&intf->si_dev->kobj,
2520 &bmc->dev->dev.kobj, intf->sysfs_name);
2521 if (rv) {
2522 kfree(intf->sysfs_name);
2523 intf->sysfs_name = NULL;
2524 printk(KERN_ERR
2525 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2526 rv);
2527 goto out_err;
2528 }
2529
2530 size = snprintf(dummy, 0, "ipmi%d", ifnum);
2531 intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
2532 if (!intf->my_dev_name) {
2533 kfree(intf->sysfs_name);
2534 intf->sysfs_name = NULL;
2535 rv = -ENOMEM;
2536 printk(KERN_ERR
2537 "ipmi_msghandler: allocate link from BMC: %d\n",
2538 rv);
2539 goto out_err;
2540 }
2541 snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
2542
2543 rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
2544 intf->my_dev_name);
2545 if (rv) {
2546 kfree(intf->sysfs_name);
2547 intf->sysfs_name = NULL;
2548 kfree(intf->my_dev_name);
2549 intf->my_dev_name = NULL;
2550 printk(KERN_ERR
2551 "ipmi_msghandler:"
2552 " Unable to create symlink to bmc: %d\n",
2553 rv);
2554 goto out_err;
2555 }
2556
2557 return 0;
2558
2559out_err:
2560 ipmi_bmc_unregister(intf);
2561 return rv;
2562}
2563
2564static int
2565send_guid_cmd(ipmi_smi_t intf, int chan)
2566{
2567 struct kernel_ipmi_msg msg;
2568 struct ipmi_system_interface_addr si;
2569
2570 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2571 si.channel = IPMI_BMC_CHANNEL;
2572 si.lun = 0;
2573
2574 msg.netfn = IPMI_NETFN_APP_REQUEST;
2575 msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2576 msg.data = NULL;
2577 msg.data_len = 0;
2578 return i_ipmi_request(NULL,
2579 intf,
2580 (struct ipmi_addr *) &si,
2581 0,
2582 &msg,
2583 intf,
2584 NULL,
2585 NULL,
2586 0,
2587 intf->channels[0].address,
2588 intf->channels[0].lun,
2589 -1, 0);
2590}
2591
2592static void
2593guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2594{
2595 if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2596 || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2597 || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2598
2599 return;
2600
2601 if (msg->msg.data[0] != 0) {
2602
2603 intf->bmc->guid_set = 0;
2604 goto out;
2605 }
2606
2607 if (msg->msg.data_len < 17) {
2608 intf->bmc->guid_set = 0;
2609 printk(KERN_WARNING PFX
2610 "guid_handler: The GUID response from the BMC was too"
2611 " short, it was %d but should have been 17. Assuming"
2612 " GUID is not available.\n",
2613 msg->msg.data_len);
2614 goto out;
2615 }
2616
2617 memcpy(intf->bmc->guid, msg->msg.data, 16);
2618 intf->bmc->guid_set = 1;
2619 out:
2620 wake_up(&intf->waitq);
2621}
2622
2623static void
2624get_guid(ipmi_smi_t intf)
2625{
2626 int rv;
2627
2628 intf->bmc->guid_set = 0x2;
2629 intf->null_user_handler = guid_handler;
2630 rv = send_guid_cmd(intf, 0);
2631 if (rv)
2632
2633 intf->bmc->guid_set = 0;
2634 wait_event(intf->waitq, intf->bmc->guid_set != 2);
2635 intf->null_user_handler = NULL;
2636}
2637
2638static int
2639send_channel_info_cmd(ipmi_smi_t intf, int chan)
2640{
2641 struct kernel_ipmi_msg msg;
2642 unsigned char data[1];
2643 struct ipmi_system_interface_addr si;
2644
2645 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2646 si.channel = IPMI_BMC_CHANNEL;
2647 si.lun = 0;
2648
2649 msg.netfn = IPMI_NETFN_APP_REQUEST;
2650 msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2651 msg.data = data;
2652 msg.data_len = 1;
2653 data[0] = chan;
2654 return i_ipmi_request(NULL,
2655 intf,
2656 (struct ipmi_addr *) &si,
2657 0,
2658 &msg,
2659 intf,
2660 NULL,
2661 NULL,
2662 0,
2663 intf->channels[0].address,
2664 intf->channels[0].lun,
2665 -1, 0);
2666}
2667
2668static void
2669channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2670{
2671 int rv = 0;
2672 int chan;
2673
2674 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2675 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
2676 && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
2677
2678 if (msg->msg.data[0] != 0) {
2679
2680
2681 if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
2682
2683
2684
2685
2686
2687
2688 intf->channels[0].medium
2689 = IPMI_CHANNEL_MEDIUM_IPMB;
2690 intf->channels[0].protocol
2691 = IPMI_CHANNEL_PROTOCOL_IPMB;
2692 rv = -ENOSYS;
2693
2694 intf->curr_channel = IPMI_MAX_CHANNELS;
2695 wake_up(&intf->waitq);
2696 goto out;
2697 }
2698 goto next_channel;
2699 }
2700 if (msg->msg.data_len < 4) {
2701
2702 goto next_channel;
2703 }
2704 chan = intf->curr_channel;
2705 intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2706 intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
2707
2708 next_channel:
2709 intf->curr_channel++;
2710 if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2711 wake_up(&intf->waitq);
2712 else
2713 rv = send_channel_info_cmd(intf, intf->curr_channel);
2714
2715 if (rv) {
2716
2717 intf->curr_channel = IPMI_MAX_CHANNELS;
2718 wake_up(&intf->waitq);
2719
2720 printk(KERN_WARNING PFX
2721 "Error sending channel information: %d\n",
2722 rv);
2723 }
2724 }
2725 out:
2726 return;
2727}
2728
2729void ipmi_poll_interface(ipmi_user_t user)
2730{
2731 ipmi_smi_t intf = user->intf;
2732
2733 if (intf->handlers->poll)
2734 intf->handlers->poll(intf->send_info);
2735}
2736EXPORT_SYMBOL(ipmi_poll_interface);
2737
2738int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2739 void *send_info,
2740 struct ipmi_device_id *device_id,
2741 struct device *si_dev,
2742 const char *sysfs_name,
2743 unsigned char slave_addr)
2744{
2745 int i, j;
2746 int rv;
2747 ipmi_smi_t intf;
2748 ipmi_smi_t tintf;
2749 struct list_head *link;
2750
2751
2752
2753
2754
2755 if (!initialized) {
2756 rv = ipmi_init_msghandler();
2757 if (rv)
2758 return rv;
2759
2760
2761
2762
2763 if (!initialized)
2764 return -ENODEV;
2765 }
2766
2767 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
2768 if (!intf)
2769 return -ENOMEM;
2770
2771 intf->ipmi_version_major = ipmi_version_major(device_id);
2772 intf->ipmi_version_minor = ipmi_version_minor(device_id);
2773
2774 intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2775 if (!intf->bmc) {
2776 kfree(intf);
2777 return -ENOMEM;
2778 }
2779 intf->intf_num = -1;
2780 kref_init(&intf->refcount);
2781 intf->bmc->id = *device_id;
2782 intf->si_dev = si_dev;
2783 for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2784 intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2785 intf->channels[j].lun = 2;
2786 }
2787 if (slave_addr != 0)
2788 intf->channels[0].address = slave_addr;
2789 INIT_LIST_HEAD(&intf->users);
2790 intf->handlers = handlers;
2791 intf->send_info = send_info;
2792 spin_lock_init(&intf->seq_lock);
2793 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2794 intf->seq_table[j].inuse = 0;
2795 intf->seq_table[j].seqid = 0;
2796 }
2797 intf->curr_seq = 0;
2798#ifdef CONFIG_PROC_FS
2799 mutex_init(&intf->proc_entry_lock);
2800#endif
2801 spin_lock_init(&intf->waiting_msgs_lock);
2802 INIT_LIST_HEAD(&intf->waiting_msgs);
2803 spin_lock_init(&intf->events_lock);
2804 INIT_LIST_HEAD(&intf->waiting_events);
2805 intf->waiting_events_count = 0;
2806 mutex_init(&intf->cmd_rcvrs_mutex);
2807 spin_lock_init(&intf->maintenance_mode_lock);
2808 INIT_LIST_HEAD(&intf->cmd_rcvrs);
2809 init_waitqueue_head(&intf->waitq);
2810 for (i = 0; i < IPMI_NUM_STATS; i++)
2811 atomic_set(&intf->stats[i], 0);
2812
2813 intf->proc_dir = NULL;
2814
2815 mutex_lock(&smi_watchers_mutex);
2816 mutex_lock(&ipmi_interfaces_mutex);
2817
2818 i = 0;
2819 link = &ipmi_interfaces;
2820 list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
2821 if (tintf->intf_num != i) {
2822 link = &tintf->link;
2823 break;
2824 }
2825 i++;
2826 }
2827
2828 if (i == 0)
2829 list_add_rcu(&intf->link, &ipmi_interfaces);
2830 else
2831 list_add_tail_rcu(&intf->link, link);
2832
2833 rv = handlers->start_processing(send_info, intf);
2834 if (rv)
2835 goto out;
2836
2837 get_guid(intf);
2838
2839 if ((intf->ipmi_version_major > 1)
2840 || ((intf->ipmi_version_major == 1)
2841 && (intf->ipmi_version_minor >= 5))) {
2842
2843
2844
2845
2846 intf->null_user_handler = channel_handler;
2847 intf->curr_channel = 0;
2848 rv = send_channel_info_cmd(intf, 0);
2849 if (rv)
2850 goto out;
2851
2852
2853 wait_event(intf->waitq,
2854 intf->curr_channel >= IPMI_MAX_CHANNELS);
2855 intf->null_user_handler = NULL;
2856 } else {
2857
2858 intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2859 intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
2860 intf->curr_channel = IPMI_MAX_CHANNELS;
2861 }
2862
2863 if (rv == 0)
2864 rv = add_proc_entries(intf, i);
2865
2866 rv = ipmi_bmc_register(intf, i, sysfs_name);
2867
2868 out:
2869 if (rv) {
2870 if (intf->proc_dir)
2871 remove_proc_entries(intf);
2872 intf->handlers = NULL;
2873 list_del_rcu(&intf->link);
2874 mutex_unlock(&ipmi_interfaces_mutex);
2875 mutex_unlock(&smi_watchers_mutex);
2876 synchronize_rcu();
2877 kref_put(&intf->refcount, intf_free);
2878 } else {
2879
2880
2881
2882
2883
2884 smp_wmb();
2885 intf->intf_num = i;
2886 mutex_unlock(&ipmi_interfaces_mutex);
2887
2888 call_smi_watchers(i, intf->si_dev);
2889 mutex_unlock(&smi_watchers_mutex);
2890 }
2891
2892 return rv;
2893}
2894EXPORT_SYMBOL(ipmi_register_smi);
2895
2896static void cleanup_smi_msgs(ipmi_smi_t intf)
2897{
2898 int i;
2899 struct seq_table *ent;
2900
2901
2902 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
2903 ent = &(intf->seq_table[i]);
2904 if (!ent->inuse)
2905 continue;
2906 deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
2907 }
2908}
2909
2910int ipmi_unregister_smi(ipmi_smi_t intf)
2911{
2912 struct ipmi_smi_watcher *w;
2913 int intf_num = intf->intf_num;
2914
2915 ipmi_bmc_unregister(intf);
2916
2917 mutex_lock(&smi_watchers_mutex);
2918 mutex_lock(&ipmi_interfaces_mutex);
2919 intf->intf_num = -1;
2920 intf->handlers = NULL;
2921 list_del_rcu(&intf->link);
2922 mutex_unlock(&ipmi_interfaces_mutex);
2923 synchronize_rcu();
2924
2925 cleanup_smi_msgs(intf);
2926
2927 remove_proc_entries(intf);
2928
2929
2930
2931
2932
2933 list_for_each_entry(w, &smi_watchers, link)
2934 w->smi_gone(intf_num);
2935 mutex_unlock(&smi_watchers_mutex);
2936
2937 kref_put(&intf->refcount, intf_free);
2938 return 0;
2939}
2940EXPORT_SYMBOL(ipmi_unregister_smi);
2941
2942static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
2943 struct ipmi_smi_msg *msg)
2944{
2945 struct ipmi_ipmb_addr ipmb_addr;
2946 struct ipmi_recv_msg *recv_msg;
2947
2948
2949
2950
2951
2952 if (msg->rsp_size < 11) {
2953
2954 ipmi_inc_stat(intf, invalid_ipmb_responses);
2955 return 0;
2956 }
2957
2958 if (msg->rsp[2] != 0) {
2959
2960 return 0;
2961 }
2962
2963 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
2964 ipmb_addr.slave_addr = msg->rsp[6];
2965 ipmb_addr.channel = msg->rsp[3] & 0x0f;
2966 ipmb_addr.lun = msg->rsp[7] & 3;
2967
2968
2969
2970
2971
2972 if (intf_find_seq(intf,
2973 msg->rsp[7] >> 2,
2974 msg->rsp[3] & 0x0f,
2975 msg->rsp[8],
2976 (msg->rsp[4] >> 2) & (~1),
2977 (struct ipmi_addr *) &(ipmb_addr),
2978 &recv_msg)) {
2979
2980
2981
2982
2983 ipmi_inc_stat(intf, unhandled_ipmb_responses);
2984 return 0;
2985 }
2986
2987 memcpy(recv_msg->msg_data,
2988 &(msg->rsp[9]),
2989 msg->rsp_size - 9);
2990
2991
2992
2993
2994
2995 recv_msg->msg.netfn = msg->rsp[4] >> 2;
2996 recv_msg->msg.data = recv_msg->msg_data;
2997 recv_msg->msg.data_len = msg->rsp_size - 10;
2998 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2999 ipmi_inc_stat(intf, handled_ipmb_responses);
3000 deliver_response(recv_msg);
3001
3002 return 0;
3003}
3004
3005static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
3006 struct ipmi_smi_msg *msg)
3007{
3008 struct cmd_rcvr *rcvr;
3009 int rv = 0;
3010 unsigned char netfn;
3011 unsigned char cmd;
3012 unsigned char chan;
3013 ipmi_user_t user = NULL;
3014 struct ipmi_ipmb_addr *ipmb_addr;
3015 struct ipmi_recv_msg *recv_msg;
3016 struct ipmi_smi_handlers *handlers;
3017
3018 if (msg->rsp_size < 10) {
3019
3020 ipmi_inc_stat(intf, invalid_commands);
3021 return 0;
3022 }
3023
3024 if (msg->rsp[2] != 0) {
3025
3026 return 0;
3027 }
3028
3029 netfn = msg->rsp[4] >> 2;
3030 cmd = msg->rsp[8];
3031 chan = msg->rsp[3] & 0xf;
3032
3033 rcu_read_lock();
3034 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3035 if (rcvr) {
3036 user = rcvr->user;
3037 kref_get(&user->refcount);
3038 } else
3039 user = NULL;
3040 rcu_read_unlock();
3041
3042 if (user == NULL) {
3043
3044 ipmi_inc_stat(intf, unhandled_commands);
3045
3046 msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
3047 msg->data[1] = IPMI_SEND_MSG_CMD;
3048 msg->data[2] = msg->rsp[3];
3049 msg->data[3] = msg->rsp[6];
3050 msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
3051 msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
3052 msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
3053
3054 msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
3055 msg->data[8] = msg->rsp[8];
3056 msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
3057 msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
3058 msg->data_size = 11;
3059
3060#ifdef DEBUG_MSGING
3061 {
3062 int m;
3063 printk("Invalid command:");
3064 for (m = 0; m < msg->data_size; m++)
3065 printk(" %2.2x", msg->data[m]);
3066 printk("\n");
3067 }
3068#endif
3069 rcu_read_lock();
3070 handlers = intf->handlers;
3071 if (handlers) {
3072 handlers->sender(intf->send_info, msg, 0);
3073
3074
3075
3076
3077
3078 rv = -1;
3079 }
3080 rcu_read_unlock();
3081 } else {
3082
3083 ipmi_inc_stat(intf, handled_commands);
3084
3085 recv_msg = ipmi_alloc_recv_msg();
3086 if (!recv_msg) {
3087
3088
3089
3090
3091
3092 rv = 1;
3093 kref_put(&user->refcount, free_user);
3094 } else {
3095
3096 ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
3097 ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
3098 ipmb_addr->slave_addr = msg->rsp[6];
3099 ipmb_addr->lun = msg->rsp[7] & 3;
3100 ipmb_addr->channel = msg->rsp[3] & 0xf;
3101
3102
3103
3104
3105
3106 recv_msg->user = user;
3107 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3108 recv_msg->msgid = msg->rsp[7] >> 2;
3109 recv_msg->msg.netfn = msg->rsp[4] >> 2;
3110 recv_msg->msg.cmd = msg->rsp[8];
3111 recv_msg->msg.data = recv_msg->msg_data;
3112
3113
3114
3115
3116
3117 recv_msg->msg.data_len = msg->rsp_size - 10;
3118 memcpy(recv_msg->msg_data,
3119 &(msg->rsp[9]),
3120 msg->rsp_size - 10);
3121 deliver_response(recv_msg);
3122 }
3123 }
3124
3125 return rv;
3126}
3127
3128static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
3129 struct ipmi_smi_msg *msg)
3130{
3131 struct ipmi_lan_addr lan_addr;
3132 struct ipmi_recv_msg *recv_msg;
3133
3134
3135
3136
3137
3138
3139 if (msg->rsp_size < 13) {
3140
3141 ipmi_inc_stat(intf, invalid_lan_responses);
3142 return 0;
3143 }
3144
3145 if (msg->rsp[2] != 0) {
3146
3147 return 0;
3148 }
3149
3150 lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
3151 lan_addr.session_handle = msg->rsp[4];
3152 lan_addr.remote_SWID = msg->rsp[8];
3153 lan_addr.local_SWID = msg->rsp[5];
3154 lan_addr.channel = msg->rsp[3] & 0x0f;
3155 lan_addr.privilege = msg->rsp[3] >> 4;
3156 lan_addr.lun = msg->rsp[9] & 3;
3157
3158
3159
3160
3161
3162 if (intf_find_seq(intf,
3163 msg->rsp[9] >> 2,
3164 msg->rsp[3] & 0x0f,
3165 msg->rsp[10],
3166 (msg->rsp[6] >> 2) & (~1),
3167 (struct ipmi_addr *) &(lan_addr),
3168 &recv_msg)) {
3169
3170
3171
3172
3173 ipmi_inc_stat(intf, unhandled_lan_responses);
3174 return 0;
3175 }
3176
3177 memcpy(recv_msg->msg_data,
3178 &(msg->rsp[11]),
3179 msg->rsp_size - 11);
3180
3181
3182
3183
3184
3185 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3186 recv_msg->msg.data = recv_msg->msg_data;
3187 recv_msg->msg.data_len = msg->rsp_size - 12;
3188 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3189 ipmi_inc_stat(intf, handled_lan_responses);
3190 deliver_response(recv_msg);
3191
3192 return 0;
3193}
3194
3195static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
3196 struct ipmi_smi_msg *msg)
3197{
3198 struct cmd_rcvr *rcvr;
3199 int rv = 0;
3200 unsigned char netfn;
3201 unsigned char cmd;
3202 unsigned char chan;
3203 ipmi_user_t user = NULL;
3204 struct ipmi_lan_addr *lan_addr;
3205 struct ipmi_recv_msg *recv_msg;
3206
3207 if (msg->rsp_size < 12) {
3208
3209 ipmi_inc_stat(intf, invalid_commands);
3210 return 0;
3211 }
3212
3213 if (msg->rsp[2] != 0) {
3214
3215 return 0;
3216 }
3217
3218 netfn = msg->rsp[6] >> 2;
3219 cmd = msg->rsp[10];
3220 chan = msg->rsp[3] & 0xf;
3221
3222 rcu_read_lock();
3223 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3224 if (rcvr) {
3225 user = rcvr->user;
3226 kref_get(&user->refcount);
3227 } else
3228 user = NULL;
3229 rcu_read_unlock();
3230
3231 if (user == NULL) {
3232
3233 ipmi_inc_stat(intf, unhandled_commands);
3234
3235
3236
3237
3238
3239 rv = 0;
3240 } else {
3241
3242 ipmi_inc_stat(intf, handled_commands);
3243
3244 recv_msg = ipmi_alloc_recv_msg();
3245 if (!recv_msg) {
3246
3247
3248
3249
3250 rv = 1;
3251 kref_put(&user->refcount, free_user);
3252 } else {
3253
3254 lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
3255 lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
3256 lan_addr->session_handle = msg->rsp[4];
3257 lan_addr->remote_SWID = msg->rsp[8];
3258 lan_addr->local_SWID = msg->rsp[5];
3259 lan_addr->lun = msg->rsp[9] & 3;
3260 lan_addr->channel = msg->rsp[3] & 0xf;
3261 lan_addr->privilege = msg->rsp[3] >> 4;
3262
3263
3264
3265
3266
3267 recv_msg->user = user;
3268 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3269 recv_msg->msgid = msg->rsp[9] >> 2;
3270 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3271 recv_msg->msg.cmd = msg->rsp[10];
3272 recv_msg->msg.data = recv_msg->msg_data;
3273
3274
3275
3276
3277
3278 recv_msg->msg.data_len = msg->rsp_size - 12;
3279 memcpy(recv_msg->msg_data,
3280 &(msg->rsp[11]),
3281 msg->rsp_size - 12);
3282 deliver_response(recv_msg);
3283 }
3284 }
3285
3286 return rv;
3287}
3288
3289
3290
3291
3292
3293
3294
3295static int handle_oem_get_msg_cmd(ipmi_smi_t intf,
3296 struct ipmi_smi_msg *msg)
3297{
3298 struct cmd_rcvr *rcvr;
3299 int rv = 0;
3300 unsigned char netfn;
3301 unsigned char cmd;
3302 unsigned char chan;
3303 ipmi_user_t user = NULL;
3304 struct ipmi_system_interface_addr *smi_addr;
3305 struct ipmi_recv_msg *recv_msg;
3306
3307
3308
3309
3310
3311 if (msg->rsp_size < 4) {
3312
3313 ipmi_inc_stat(intf, invalid_commands);
3314 return 0;
3315 }
3316
3317 if (msg->rsp[2] != 0) {
3318
3319 return 0;
3320 }
3321
3322
3323
3324
3325
3326 netfn = msg->rsp[0] >> 2;
3327 cmd = msg->rsp[1];
3328 chan = msg->rsp[3] & 0xf;
3329
3330 rcu_read_lock();
3331 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3332 if (rcvr) {
3333 user = rcvr->user;
3334 kref_get(&user->refcount);
3335 } else
3336 user = NULL;
3337 rcu_read_unlock();
3338
3339 if (user == NULL) {
3340
3341 ipmi_inc_stat(intf, unhandled_commands);
3342
3343
3344
3345
3346
3347
3348 rv = 0;
3349 } else {
3350
3351 ipmi_inc_stat(intf, handled_commands);
3352
3353 recv_msg = ipmi_alloc_recv_msg();
3354 if (!recv_msg) {
3355
3356
3357
3358
3359
3360 rv = 1;
3361 kref_put(&user->refcount, free_user);
3362 } else {
3363
3364
3365
3366
3367
3368
3369 smi_addr = ((struct ipmi_system_interface_addr *)
3370 &(recv_msg->addr));
3371 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3372 smi_addr->channel = IPMI_BMC_CHANNEL;
3373 smi_addr->lun = msg->rsp[0] & 3;
3374
3375 recv_msg->user = user;
3376 recv_msg->user_msg_data = NULL;
3377 recv_msg->recv_type = IPMI_OEM_RECV_TYPE;
3378 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3379 recv_msg->msg.cmd = msg->rsp[1];
3380 recv_msg->msg.data = recv_msg->msg_data;
3381
3382
3383
3384
3385
3386 recv_msg->msg.data_len = msg->rsp_size - 4;
3387 memcpy(recv_msg->msg_data,
3388 &(msg->rsp[4]),
3389 msg->rsp_size - 4);
3390 deliver_response(recv_msg);
3391 }
3392 }
3393
3394 return rv;
3395}
3396
3397static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
3398 struct ipmi_smi_msg *msg)
3399{
3400 struct ipmi_system_interface_addr *smi_addr;
3401
3402 recv_msg->msgid = 0;
3403 smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
3404 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3405 smi_addr->channel = IPMI_BMC_CHANNEL;
3406 smi_addr->lun = msg->rsp[0] & 3;
3407 recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
3408 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3409 recv_msg->msg.cmd = msg->rsp[1];
3410 memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
3411 recv_msg->msg.data = recv_msg->msg_data;
3412 recv_msg->msg.data_len = msg->rsp_size - 3;
3413}
3414
3415static int handle_read_event_rsp(ipmi_smi_t intf,
3416 struct ipmi_smi_msg *msg)
3417{
3418 struct ipmi_recv_msg *recv_msg, *recv_msg2;
3419 struct list_head msgs;
3420 ipmi_user_t user;
3421 int rv = 0;
3422 int deliver_count = 0;
3423 unsigned long flags;
3424
3425 if (msg->rsp_size < 19) {
3426
3427 ipmi_inc_stat(intf, invalid_events);
3428 return 0;
3429 }
3430
3431 if (msg->rsp[2] != 0) {
3432
3433 return 0;
3434 }
3435
3436 INIT_LIST_HEAD(&msgs);
3437
3438 spin_lock_irqsave(&intf->events_lock, flags);
3439
3440 ipmi_inc_stat(intf, events);
3441
3442
3443
3444
3445
3446 rcu_read_lock();
3447 list_for_each_entry_rcu(user, &intf->users, link) {
3448 if (!user->gets_events)
3449 continue;
3450
3451 recv_msg = ipmi_alloc_recv_msg();
3452 if (!recv_msg) {
3453 rcu_read_unlock();
3454 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
3455 link) {
3456 list_del(&recv_msg->link);
3457 ipmi_free_recv_msg(recv_msg);
3458 }
3459
3460
3461
3462
3463
3464 rv = 1;
3465 goto out;
3466 }
3467
3468 deliver_count++;
3469
3470 copy_event_into_recv_msg(recv_msg, msg);
3471 recv_msg->user = user;
3472 kref_get(&user->refcount);
3473 list_add_tail(&(recv_msg->link), &msgs);
3474 }
3475 rcu_read_unlock();
3476
3477 if (deliver_count) {
3478
3479 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
3480 list_del(&recv_msg->link);
3481 deliver_response(recv_msg);
3482 }
3483 } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
3484
3485
3486
3487
3488 recv_msg = ipmi_alloc_recv_msg();
3489 if (!recv_msg) {
3490
3491
3492
3493
3494
3495 rv = 1;
3496 goto out;
3497 }
3498
3499 copy_event_into_recv_msg(recv_msg, msg);
3500 list_add_tail(&(recv_msg->link), &(intf->waiting_events));
3501 intf->waiting_events_count++;
3502 } else if (!intf->event_msg_printed) {
3503
3504
3505
3506
3507 printk(KERN_WARNING PFX "Event queue full, discarding"
3508 " incoming events\n");
3509 intf->event_msg_printed = 1;
3510 }
3511
3512 out:
3513 spin_unlock_irqrestore(&(intf->events_lock), flags);
3514
3515 return rv;
3516}
3517
3518static int handle_bmc_rsp(ipmi_smi_t intf,
3519 struct ipmi_smi_msg *msg)
3520{
3521 struct ipmi_recv_msg *recv_msg;
3522 struct ipmi_user *user;
3523
3524 recv_msg = (struct ipmi_recv_msg *) msg->user_data;
3525 if (recv_msg == NULL) {
3526 printk(KERN_WARNING
3527 "IPMI message received with no owner. This\n"
3528 "could be because of a malformed message, or\n"
3529 "because of a hardware error. Contact your\n"
3530 "hardware vender for assistance\n");
3531 return 0;
3532 }
3533
3534 user = recv_msg->user;
3535
3536 if (user && !user->valid) {
3537
3538 ipmi_inc_stat(intf, unhandled_local_responses);
3539 ipmi_free_recv_msg(recv_msg);
3540 } else {
3541 struct ipmi_system_interface_addr *smi_addr;
3542
3543 ipmi_inc_stat(intf, handled_local_responses);
3544 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3545 recv_msg->msgid = msg->msgid;
3546 smi_addr = ((struct ipmi_system_interface_addr *)
3547 &(recv_msg->addr));
3548 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3549 smi_addr->channel = IPMI_BMC_CHANNEL;
3550 smi_addr->lun = msg->rsp[0] & 3;
3551 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3552 recv_msg->msg.cmd = msg->rsp[1];
3553 memcpy(recv_msg->msg_data,
3554 &(msg->rsp[2]),
3555 msg->rsp_size - 2);
3556 recv_msg->msg.data = recv_msg->msg_data;
3557 recv_msg->msg.data_len = msg->rsp_size - 2;
3558 deliver_response(recv_msg);
3559 }
3560
3561 return 0;
3562}
3563
3564
3565
3566
3567
3568
3569static int handle_new_recv_msg(ipmi_smi_t intf,
3570 struct ipmi_smi_msg *msg)
3571{
3572 int requeue;
3573 int chan;
3574
3575#ifdef DEBUG_MSGING
3576 int m;
3577 printk("Recv:");
3578 for (m = 0; m < msg->rsp_size; m++)
3579 printk(" %2.2x", msg->rsp[m]);
3580 printk("\n");
3581#endif
3582 if (msg->rsp_size < 2) {
3583
3584 printk(KERN_WARNING PFX "BMC returned to small a message"
3585 " for netfn %x cmd %x, got %d bytes\n",
3586 (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3587
3588
3589 msg->rsp[0] = msg->data[0] | (1 << 2);
3590 msg->rsp[1] = msg->data[1];
3591 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3592 msg->rsp_size = 3;
3593 } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
3594 || (msg->rsp[1] != msg->data[1])) {
3595
3596
3597
3598
3599 printk(KERN_WARNING PFX "BMC returned incorrect response,"
3600 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3601 (msg->data[0] >> 2) | 1, msg->data[1],
3602 msg->rsp[0] >> 2, msg->rsp[1]);
3603
3604
3605 msg->rsp[0] = msg->data[0] | (1 << 2);
3606 msg->rsp[1] = msg->data[1];
3607 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3608 msg->rsp_size = 3;
3609 }
3610
3611 if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3612 && (msg->rsp[1] == IPMI_SEND_MSG_CMD)
3613 && (msg->user_data != NULL)) {
3614
3615
3616
3617
3618 struct ipmi_recv_msg *recv_msg = msg->user_data;
3619
3620 requeue = 0;
3621 if (msg->rsp_size < 2)
3622
3623 goto out;
3624
3625 chan = msg->data[2] & 0x0f;
3626 if (chan >= IPMI_MAX_CHANNELS)
3627
3628 goto out;
3629
3630 if (!recv_msg)
3631 goto out;
3632
3633
3634 if (!recv_msg->user || !recv_msg->user->valid)
3635 goto out;
3636
3637 recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3638 recv_msg->msg.data = recv_msg->msg_data;
3639 recv_msg->msg.data_len = 1;
3640 recv_msg->msg_data[0] = msg->rsp[2];
3641 deliver_response(recv_msg);
3642 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3643 && (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
3644
3645 chan = msg->rsp[3] & 0xf;
3646 if (chan >= IPMI_MAX_CHANNELS) {
3647
3648 requeue = 0;
3649 goto out;
3650 }
3651
3652
3653
3654
3655
3656
3657
3658 if (intf->curr_channel < IPMI_MAX_CHANNELS) {
3659 requeue = 0;
3660 goto out;
3661 }
3662
3663 switch (intf->channels[chan].medium) {
3664 case IPMI_CHANNEL_MEDIUM_IPMB:
3665 if (msg->rsp[4] & 0x04) {
3666
3667
3668
3669
3670 requeue = handle_ipmb_get_msg_rsp(intf, msg);
3671 } else {
3672
3673
3674
3675
3676 requeue = handle_ipmb_get_msg_cmd(intf, msg);
3677 }
3678 break;
3679
3680 case IPMI_CHANNEL_MEDIUM_8023LAN:
3681 case IPMI_CHANNEL_MEDIUM_ASYNC:
3682 if (msg->rsp[6] & 0x04) {
3683
3684
3685
3686
3687 requeue = handle_lan_get_msg_rsp(intf, msg);
3688 } else {
3689
3690
3691
3692
3693 requeue = handle_lan_get_msg_cmd(intf, msg);
3694 }
3695 break;
3696
3697 default:
3698
3699
3700 if ((intf->channels[chan].medium
3701 >= IPMI_CHANNEL_MEDIUM_OEM_MIN)
3702 && (intf->channels[chan].medium
3703 <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) {
3704 requeue = handle_oem_get_msg_cmd(intf, msg);
3705 } else {
3706
3707
3708
3709
3710 requeue = 0;
3711 }
3712 }
3713
3714 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3715 && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
3716
3717 requeue = handle_read_event_rsp(intf, msg);
3718 } else {
3719
3720 requeue = handle_bmc_rsp(intf, msg);
3721 }
3722
3723 out:
3724 return requeue;
3725}
3726
3727
3728void ipmi_smi_msg_received(ipmi_smi_t intf,
3729 struct ipmi_smi_msg *msg)
3730{
3731 unsigned long flags = 0;
3732 int rv;
3733 int run_to_completion;
3734
3735
3736 if ((msg->data_size >= 2)
3737 && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3738 && (msg->data[1] == IPMI_SEND_MSG_CMD)
3739 && (msg->user_data == NULL)) {
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753 if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3754 && (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
3755 && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
3756 && (msg->rsp[2] != IPMI_BUS_ERR)
3757 && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
3758 int chan = msg->rsp[3] & 0xf;
3759
3760
3761 if (chan >= IPMI_MAX_CHANNELS)
3762 ;
3763 else if ((intf->channels[chan].medium
3764 == IPMI_CHANNEL_MEDIUM_8023LAN)
3765 || (intf->channels[chan].medium
3766 == IPMI_CHANNEL_MEDIUM_ASYNC))
3767 ipmi_inc_stat(intf, sent_lan_command_errs);
3768 else
3769 ipmi_inc_stat(intf, sent_ipmb_command_errs);
3770 intf_err_seq(intf, msg->msgid, msg->rsp[2]);
3771 } else
3772
3773 intf_start_seq_timer(intf, msg->msgid);
3774
3775 ipmi_free_smi_msg(msg);
3776 goto out;
3777 }
3778
3779
3780
3781
3782
3783 run_to_completion = intf->run_to_completion;
3784 if (!run_to_completion)
3785 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3786 if (!list_empty(&intf->waiting_msgs)) {
3787 list_add_tail(&msg->link, &intf->waiting_msgs);
3788 if (!run_to_completion)
3789 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3790 goto out;
3791 }
3792 if (!run_to_completion)
3793 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3794
3795 rv = handle_new_recv_msg(intf, msg);
3796 if (rv > 0) {
3797
3798
3799
3800
3801 run_to_completion = intf->run_to_completion;
3802 if (!run_to_completion)
3803 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3804 list_add_tail(&msg->link, &intf->waiting_msgs);
3805 if (!run_to_completion)
3806 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3807 } else if (rv == 0) {
3808 ipmi_free_smi_msg(msg);
3809 }
3810
3811 out:
3812 return;
3813}
3814EXPORT_SYMBOL(ipmi_smi_msg_received);
3815
3816void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3817{
3818 ipmi_user_t user;
3819
3820 rcu_read_lock();
3821 list_for_each_entry_rcu(user, &intf->users, link) {
3822 if (!user->handler->ipmi_watchdog_pretimeout)
3823 continue;
3824
3825 user->handler->ipmi_watchdog_pretimeout(user->handler_data);
3826 }
3827 rcu_read_unlock();
3828}
3829EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
3830
3831static struct ipmi_smi_msg *
3832smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3833 unsigned char seq, long seqid)
3834{
3835 struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
3836 if (!smi_msg)
3837
3838
3839
3840
3841 return NULL;
3842
3843 memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3844 smi_msg->data_size = recv_msg->msg.data_len;
3845 smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
3846
3847#ifdef DEBUG_MSGING
3848 {
3849 int m;
3850 printk("Resend: ");
3851 for (m = 0; m < smi_msg->data_size; m++)
3852 printk(" %2.2x", smi_msg->data[m]);
3853 printk("\n");
3854 }
3855#endif
3856 return smi_msg;
3857}
3858
3859static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3860 struct list_head *timeouts, long timeout_period,
3861 int slot, unsigned long *flags)
3862{
3863 struct ipmi_recv_msg *msg;
3864 struct ipmi_smi_handlers *handlers;
3865
3866 if (intf->intf_num == -1)
3867 return;
3868
3869 if (!ent->inuse)
3870 return;
3871
3872 ent->timeout -= timeout_period;
3873 if (ent->timeout > 0)
3874 return;
3875
3876 if (ent->retries_left == 0) {
3877
3878 ent->inuse = 0;
3879 msg = ent->recv_msg;
3880 list_add_tail(&msg->link, timeouts);
3881 if (ent->broadcast)
3882 ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
3883 else if (is_lan_addr(&ent->recv_msg->addr))
3884 ipmi_inc_stat(intf, timed_out_lan_commands);
3885 else
3886 ipmi_inc_stat(intf, timed_out_ipmb_commands);
3887 } else {
3888 struct ipmi_smi_msg *smi_msg;
3889
3890
3891
3892
3893
3894
3895 ent->timeout = MAX_MSG_TIMEOUT;
3896 ent->retries_left--;
3897 smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3898 ent->seqid);
3899 if (!smi_msg) {
3900 if (is_lan_addr(&ent->recv_msg->addr))
3901 ipmi_inc_stat(intf,
3902 dropped_rexmit_lan_commands);
3903 else
3904 ipmi_inc_stat(intf,
3905 dropped_rexmit_ipmb_commands);
3906 return;
3907 }
3908
3909 spin_unlock_irqrestore(&intf->seq_lock, *flags);
3910
3911
3912
3913
3914
3915
3916
3917
3918 handlers = intf->handlers;
3919 if (handlers) {
3920 if (is_lan_addr(&ent->recv_msg->addr))
3921 ipmi_inc_stat(intf,
3922 retransmitted_lan_commands);
3923 else
3924 ipmi_inc_stat(intf,
3925 retransmitted_ipmb_commands);
3926
3927 intf->handlers->sender(intf->send_info,
3928 smi_msg, 0);
3929 } else
3930 ipmi_free_smi_msg(smi_msg);
3931
3932 spin_lock_irqsave(&intf->seq_lock, *flags);
3933 }
3934}
3935
3936static void ipmi_timeout_handler(long timeout_period)
3937{
3938 ipmi_smi_t intf;
3939 struct list_head timeouts;
3940 struct ipmi_recv_msg *msg, *msg2;
3941 struct ipmi_smi_msg *smi_msg, *smi_msg2;
3942 unsigned long flags;
3943 int i;
3944
3945 rcu_read_lock();
3946 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
3947
3948 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3949 list_for_each_entry_safe(smi_msg, smi_msg2,
3950 &intf->waiting_msgs, link) {
3951 if (!handle_new_recv_msg(intf, smi_msg)) {
3952 list_del(&smi_msg->link);
3953 ipmi_free_smi_msg(smi_msg);
3954 } else {
3955
3956
3957
3958
3959 break;
3960 }
3961 }
3962 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3963
3964
3965
3966
3967
3968
3969 INIT_LIST_HEAD(&timeouts);
3970 spin_lock_irqsave(&intf->seq_lock, flags);
3971 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
3972 check_msg_timeout(intf, &(intf->seq_table[i]),
3973 &timeouts, timeout_period, i,
3974 &flags);
3975 spin_unlock_irqrestore(&intf->seq_lock, flags);
3976
3977 list_for_each_entry_safe(msg, msg2, &timeouts, link)
3978 deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988 if (intf->auto_maintenance_timeout > 0) {
3989 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
3990 if (intf->auto_maintenance_timeout > 0) {
3991 intf->auto_maintenance_timeout
3992 -= timeout_period;
3993 if (!intf->maintenance_mode
3994 && (intf->auto_maintenance_timeout <= 0)) {
3995 intf->maintenance_mode_enable = 0;
3996 maintenance_mode_update(intf);
3997 }
3998 }
3999 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
4000 flags);
4001 }
4002 }
4003 rcu_read_unlock();
4004}
4005
4006static void ipmi_request_event(void)
4007{
4008 ipmi_smi_t intf;
4009 struct ipmi_smi_handlers *handlers;
4010
4011 rcu_read_lock();
4012
4013
4014
4015
4016 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4017
4018 if (intf->maintenance_mode_enable)
4019 continue;
4020
4021 handlers = intf->handlers;
4022 if (handlers)
4023 handlers->request_events(intf->send_info);
4024 }
4025 rcu_read_unlock();
4026}
4027
4028static struct timer_list ipmi_timer;
4029
4030
4031#define IPMI_TIMEOUT_TIME 100
4032
4033
4034#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
4035
4036
4037
4038
4039
4040
4041
4042#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
4043
4044static atomic_t stop_operation;
4045static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
4046
4047static void ipmi_timeout(unsigned long data)
4048{
4049 if (atomic_read(&stop_operation))
4050 return;
4051
4052 ticks_to_req_ev--;
4053 if (ticks_to_req_ev == 0) {
4054 ipmi_request_event();
4055 ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
4056 }
4057
4058 ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
4059
4060 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4061}
4062
4063
4064static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
4065static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
4066
4067
4068static void free_smi_msg(struct ipmi_smi_msg *msg)
4069{
4070 atomic_dec(&smi_msg_inuse_count);
4071 kfree(msg);
4072}
4073
4074struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
4075{
4076 struct ipmi_smi_msg *rv;
4077 rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
4078 if (rv) {
4079 rv->done = free_smi_msg;
4080 rv->user_data = NULL;
4081 atomic_inc(&smi_msg_inuse_count);
4082 }
4083 return rv;
4084}
4085EXPORT_SYMBOL(ipmi_alloc_smi_msg);
4086
4087static void free_recv_msg(struct ipmi_recv_msg *msg)
4088{
4089 atomic_dec(&recv_msg_inuse_count);
4090 kfree(msg);
4091}
4092
4093static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
4094{
4095 struct ipmi_recv_msg *rv;
4096
4097 rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
4098 if (rv) {
4099 rv->user = NULL;
4100 rv->done = free_recv_msg;
4101 atomic_inc(&recv_msg_inuse_count);
4102 }
4103 return rv;
4104}
4105
4106void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
4107{
4108 if (msg->user)
4109 kref_put(&msg->user->refcount, free_user);
4110 msg->done(msg);
4111}
4112EXPORT_SYMBOL(ipmi_free_recv_msg);
4113
4114#ifdef CONFIG_IPMI_PANIC_EVENT
4115
4116static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
4117{
4118}
4119
4120static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
4121{
4122}
4123
4124#ifdef CONFIG_IPMI_PANIC_STRING
4125static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
4126{
4127 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4128 && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
4129 && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
4130 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
4131
4132 intf->event_receiver = msg->msg.data[1];
4133 intf->event_receiver_lun = msg->msg.data[2] & 0x3;
4134 }
4135}
4136
4137static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
4138{
4139 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4140 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
4141 && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
4142 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
4143
4144
4145
4146
4147 intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
4148 intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
4149 }
4150}
4151#endif
4152
4153static void send_panic_events(char *str)
4154{
4155 struct kernel_ipmi_msg msg;
4156 ipmi_smi_t intf;
4157 unsigned char data[16];
4158 struct ipmi_system_interface_addr *si;
4159 struct ipmi_addr addr;
4160 struct ipmi_smi_msg smi_msg;
4161 struct ipmi_recv_msg recv_msg;
4162
4163 si = (struct ipmi_system_interface_addr *) &addr;
4164 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4165 si->channel = IPMI_BMC_CHANNEL;
4166 si->lun = 0;
4167
4168
4169 msg.netfn = 0x04;
4170 msg.cmd = 2;
4171 msg.data = data;
4172 msg.data_len = 8;
4173 data[0] = 0x41;
4174 data[1] = 0x03;
4175 data[2] = 0x20;
4176 data[4] = 0x6f;
4177 data[5] = 0xa1;
4178
4179
4180
4181
4182
4183 if (str) {
4184 data[3] = str[0];
4185 data[6] = str[1];
4186 data[7] = str[2];
4187 }
4188
4189 smi_msg.done = dummy_smi_done_handler;
4190 recv_msg.done = dummy_recv_done_handler;
4191
4192
4193 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4194 if (!intf->handlers)
4195
4196 continue;
4197
4198 intf->run_to_completion = 1;
4199
4200 intf->handlers->set_run_to_completion(intf->send_info, 1);
4201 i_ipmi_request(NULL,
4202 intf,
4203 &addr,
4204 0,
4205 &msg,
4206 intf,
4207 &smi_msg,
4208 &recv_msg,
4209 0,
4210 intf->channels[0].address,
4211 intf->channels[0].lun,
4212 0, 1);
4213 }
4214
4215#ifdef CONFIG_IPMI_PANIC_STRING
4216
4217
4218
4219
4220 if (!str)
4221 return;
4222
4223
4224 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4225 char *p = str;
4226 struct ipmi_ipmb_addr *ipmb;
4227 int j;
4228
4229 if (intf->intf_num == -1)
4230
4231 continue;
4232
4233
4234
4235
4236
4237
4238
4239 smp_rmb();
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250 intf->local_sel_device = 0;
4251 intf->local_event_generator = 0;
4252 intf->event_receiver = 0;
4253
4254
4255 msg.netfn = IPMI_NETFN_APP_REQUEST;
4256 msg.cmd = IPMI_GET_DEVICE_ID_CMD;
4257 msg.data = NULL;
4258 msg.data_len = 0;
4259 intf->null_user_handler = device_id_fetcher;
4260 i_ipmi_request(NULL,
4261 intf,
4262 &addr,
4263 0,
4264 &msg,
4265 intf,
4266 &smi_msg,
4267 &recv_msg,
4268 0,
4269 intf->channels[0].address,
4270 intf->channels[0].lun,
4271 0, 1);
4272
4273 if (intf->local_event_generator) {
4274
4275 msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
4276 msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
4277 msg.data = NULL;
4278 msg.data_len = 0;
4279 intf->null_user_handler = event_receiver_fetcher;
4280 i_ipmi_request(NULL,
4281 intf,
4282 &addr,
4283 0,
4284 &msg,
4285 intf,
4286 &smi_msg,
4287 &recv_msg,
4288 0,
4289 intf->channels[0].address,
4290 intf->channels[0].lun,
4291 0, 1);
4292 }
4293 intf->null_user_handler = NULL;
4294
4295
4296
4297
4298
4299
4300 if (((intf->event_receiver & 1) == 0)
4301 && (intf->event_receiver != 0)
4302 && (intf->event_receiver != intf->channels[0].address)) {
4303
4304
4305
4306
4307 ipmb = (struct ipmi_ipmb_addr *) &addr;
4308 ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
4309 ipmb->channel = 0;
4310 ipmb->lun = intf->event_receiver_lun;
4311 ipmb->slave_addr = intf->event_receiver;
4312 } else if (intf->local_sel_device) {
4313
4314
4315
4316
4317
4318 si = (struct ipmi_system_interface_addr *) &addr;
4319 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4320 si->channel = IPMI_BMC_CHANNEL;
4321 si->lun = 0;
4322 } else
4323 continue;
4324
4325 msg.netfn = IPMI_NETFN_STORAGE_REQUEST;
4326 msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
4327 msg.data = data;
4328 msg.data_len = 16;
4329
4330 j = 0;
4331 while (*p) {
4332 int size = strlen(p);
4333
4334 if (size > 11)
4335 size = 11;
4336 data[0] = 0;
4337 data[1] = 0;
4338 data[2] = 0xf0;
4339 data[3] = intf->channels[0].address;
4340 data[4] = j++;
4341
4342
4343
4344
4345 strncpy(data+5, p, 11);
4346 p += size;
4347
4348 i_ipmi_request(NULL,
4349 intf,
4350 &addr,
4351 0,
4352 &msg,
4353 intf,
4354 &smi_msg,
4355 &recv_msg,
4356 0,
4357 intf->channels[0].address,
4358 intf->channels[0].lun,
4359 0, 1);
4360 }
4361 }
4362#endif
4363}
4364#endif
4365
4366static int has_panicked;
4367
4368static int panic_event(struct notifier_block *this,
4369 unsigned long event,
4370 void *ptr)
4371{
4372 ipmi_smi_t intf;
4373
4374 if (has_panicked)
4375 return NOTIFY_DONE;
4376 has_panicked = 1;
4377
4378
4379 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4380 if (!intf->handlers)
4381
4382 continue;
4383
4384 intf->run_to_completion = 1;
4385 intf->handlers->set_run_to_completion(intf->send_info, 1);
4386 }
4387
4388#ifdef CONFIG_IPMI_PANIC_EVENT
4389 send_panic_events(ptr);
4390#endif
4391
4392 return NOTIFY_DONE;
4393}
4394
4395static struct notifier_block panic_block = {
4396 .notifier_call = panic_event,
4397 .next = NULL,
4398 .priority = 200
4399};
4400
4401static int ipmi_init_msghandler(void)
4402{
4403 int rv;
4404
4405 if (initialized)
4406 return 0;
4407
4408 rv = driver_register(&ipmidriver.driver);
4409 if (rv) {
4410 printk(KERN_ERR PFX "Could not register IPMI driver\n");
4411 return rv;
4412 }
4413
4414 printk(KERN_INFO "ipmi message handler version "
4415 IPMI_DRIVER_VERSION "\n");
4416
4417#ifdef CONFIG_PROC_FS
4418 proc_ipmi_root = proc_mkdir("ipmi", NULL);
4419 if (!proc_ipmi_root) {
4420 printk(KERN_ERR PFX "Unable to create IPMI proc dir");
4421 return -ENOMEM;
4422 }
4423
4424#endif
4425
4426 setup_timer(&ipmi_timer, ipmi_timeout, 0);
4427 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4428
4429 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
4430
4431 initialized = 1;
4432
4433 return 0;
4434}
4435
4436static __init int ipmi_init_msghandler_mod(void)
4437{
4438 ipmi_init_msghandler();
4439 return 0;
4440}
4441
4442static __exit void cleanup_ipmi(void)
4443{
4444 int count;
4445
4446 if (!initialized)
4447 return;
4448
4449 atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461 atomic_inc(&stop_operation);
4462 del_timer_sync(&ipmi_timer);
4463
4464#ifdef CONFIG_PROC_FS
4465 remove_proc_entry(proc_ipmi_root->name, NULL);
4466#endif
4467
4468 driver_unregister(&ipmidriver.driver);
4469
4470 initialized = 0;
4471
4472
4473 count = atomic_read(&smi_msg_inuse_count);
4474 if (count != 0)
4475 printk(KERN_WARNING PFX "SMI message count %d at exit\n",
4476 count);
4477 count = atomic_read(&recv_msg_inuse_count);
4478 if (count != 0)
4479 printk(KERN_WARNING PFX "recv message count %d at exit\n",
4480 count);
4481}
4482module_exit(cleanup_ipmi);
4483
4484module_init(ipmi_init_msghandler_mod);
4485MODULE_LICENSE("GPL");
4486MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
4487MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
4488 " interface.");
4489MODULE_VERSION(IPMI_DRIVER_VERSION);
4490