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42#include <linux/module.h>
43#include <linux/moduleparam.h>
44#include <asm/system.h>
45#include <linux/sched.h>
46#include <linux/timer.h>
47#include <linux/errno.h>
48#include <linux/spinlock.h>
49#include <linux/slab.h>
50#include <linux/delay.h>
51#include <linux/list.h>
52#include <linux/pci.h>
53#include <linux/ioport.h>
54#include <linux/notifier.h>
55#include <linux/mutex.h>
56#include <linux/kthread.h>
57#include <asm/irq.h>
58#include <linux/interrupt.h>
59#include <linux/rcupdate.h>
60#include <linux/ipmi.h>
61#include <linux/ipmi_smi.h>
62#include <asm/io.h>
63#include "ipmi_si_sm.h"
64#include <linux/init.h>
65#include <linux/dmi.h>
66#include <linux/string.h>
67#include <linux/ctype.h>
68#include <linux/pnp.h>
69
70#ifdef CONFIG_PPC_OF
71#include <linux/of_device.h>
72#include <linux/of_platform.h>
73#include <linux/of_address.h>
74#include <linux/of_irq.h>
75#endif
76
77#define PFX "ipmi_si: "
78
79
80#undef DEBUG_TIMING
81
82
83#define SI_TIMEOUT_TIME_USEC 10000
84#define SI_USEC_PER_JIFFY (1000000/HZ)
85#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
86#define SI_SHORT_TIMEOUT_USEC 250
87
88
89enum si_intf_state {
90 SI_NORMAL,
91 SI_GETTING_FLAGS,
92 SI_GETTING_EVENTS,
93 SI_CLEARING_FLAGS,
94 SI_CLEARING_FLAGS_THEN_SET_IRQ,
95 SI_GETTING_MESSAGES,
96 SI_ENABLE_INTERRUPTS1,
97 SI_ENABLE_INTERRUPTS2,
98 SI_DISABLE_INTERRUPTS1,
99 SI_DISABLE_INTERRUPTS2
100
101};
102
103
104#define IPMI_BT_INTMASK_REG 2
105#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
106#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
107
108enum si_type {
109 SI_KCS, SI_SMIC, SI_BT
110};
111static char *si_to_str[] = { "kcs", "smic", "bt" };
112
113static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
114 "ACPI", "SMBIOS", "PCI",
115 "device-tree", "default" };
116
117#define DEVICE_NAME "ipmi_si"
118
119static struct platform_driver ipmi_driver = {
120 .driver = {
121 .name = DEVICE_NAME,
122 .bus = &platform_bus_type
123 }
124};
125
126
127
128
129
130enum si_stat_indexes {
131
132
133
134
135 SI_STAT_short_timeouts = 0,
136
137
138
139
140
141 SI_STAT_long_timeouts,
142
143
144 SI_STAT_idles,
145
146
147 SI_STAT_interrupts,
148
149
150 SI_STAT_attentions,
151
152
153 SI_STAT_flag_fetches,
154
155
156 SI_STAT_hosed_count,
157
158
159 SI_STAT_complete_transactions,
160
161
162 SI_STAT_events,
163
164
165 SI_STAT_watchdog_pretimeouts,
166
167
168 SI_STAT_incoming_messages,
169
170
171
172 SI_NUM_STATS
173};
174
175struct smi_info {
176 int intf_num;
177 ipmi_smi_t intf;
178 struct si_sm_data *si_sm;
179 struct si_sm_handlers *handlers;
180 enum si_type si_type;
181 spinlock_t si_lock;
182 spinlock_t msg_lock;
183 struct list_head xmit_msgs;
184 struct list_head hp_xmit_msgs;
185 struct ipmi_smi_msg *curr_msg;
186 enum si_intf_state si_state;
187
188
189
190
191
192 struct si_sm_io io;
193 int (*io_setup)(struct smi_info *info);
194 void (*io_cleanup)(struct smi_info *info);
195 int (*irq_setup)(struct smi_info *info);
196 void (*irq_cleanup)(struct smi_info *info);
197 unsigned int io_size;
198 enum ipmi_addr_src addr_source;
199 void (*addr_source_cleanup)(struct smi_info *info);
200 void *addr_source_data;
201
202
203
204
205
206
207 int (*oem_data_avail_handler)(struct smi_info *smi_info);
208
209
210
211
212
213
214#define RECEIVE_MSG_AVAIL 0x01
215#define EVENT_MSG_BUFFER_FULL 0x02
216#define WDT_PRE_TIMEOUT_INT 0x08
217#define OEM0_DATA_AVAIL 0x20
218#define OEM1_DATA_AVAIL 0x40
219#define OEM2_DATA_AVAIL 0x80
220#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
221 OEM1_DATA_AVAIL | \
222 OEM2_DATA_AVAIL)
223 unsigned char msg_flags;
224
225
226 char has_event_buffer;
227
228
229
230
231
232 atomic_t req_events;
233
234
235
236
237
238
239 int run_to_completion;
240
241
242 int port;
243
244
245
246
247
248
249 unsigned int spacing;
250
251
252 int irq;
253
254
255 struct timer_list si_timer;
256
257
258 unsigned long last_timeout_jiffies;
259
260
261 atomic_t stop_operation;
262
263
264
265
266
267
268
269 int interrupt_disabled;
270
271
272 struct ipmi_device_id device_id;
273
274
275 struct device *dev;
276 struct platform_device *pdev;
277
278
279
280
281
282 int dev_registered;
283
284
285 unsigned char slave_addr;
286
287
288 atomic_t stats[SI_NUM_STATS];
289
290 struct task_struct *thread;
291
292 struct list_head link;
293 union ipmi_smi_info_union addr_info;
294};
295
296#define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298#define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
300
301#define SI_MAX_PARMS 4
302
303static int force_kipmid[SI_MAX_PARMS];
304static int num_force_kipmid;
305#ifdef CONFIG_PCI
306static int pci_registered;
307#endif
308#ifdef CONFIG_ACPI
309static int pnp_registered;
310#endif
311#ifdef CONFIG_PPC_OF
312static int of_registered;
313#endif
314
315static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
316static int num_max_busy_us;
317
318static int unload_when_empty = 1;
319
320static int add_smi(struct smi_info *smi);
321static int try_smi_init(struct smi_info *smi);
322static void cleanup_one_si(struct smi_info *to_clean);
323static void cleanup_ipmi_si(void);
324
325static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
326static int register_xaction_notifier(struct notifier_block *nb)
327{
328 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
329}
330
331static void deliver_recv_msg(struct smi_info *smi_info,
332 struct ipmi_smi_msg *msg)
333{
334
335
336
337 if (smi_info->run_to_completion) {
338 ipmi_smi_msg_received(smi_info->intf, msg);
339 } else {
340 spin_unlock(&(smi_info->si_lock));
341 ipmi_smi_msg_received(smi_info->intf, msg);
342 spin_lock(&(smi_info->si_lock));
343 }
344}
345
346static void return_hosed_msg(struct smi_info *smi_info, int cCode)
347{
348 struct ipmi_smi_msg *msg = smi_info->curr_msg;
349
350 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
351 cCode = IPMI_ERR_UNSPECIFIED;
352
353
354
355 msg->rsp[0] = msg->data[0] | 4;
356 msg->rsp[1] = msg->data[1];
357 msg->rsp[2] = cCode;
358 msg->rsp_size = 3;
359
360 smi_info->curr_msg = NULL;
361 deliver_recv_msg(smi_info, msg);
362}
363
364static enum si_sm_result start_next_msg(struct smi_info *smi_info)
365{
366 int rv;
367 struct list_head *entry = NULL;
368#ifdef DEBUG_TIMING
369 struct timeval t;
370#endif
371
372
373
374
375
376 if (!smi_info->run_to_completion)
377 spin_lock(&(smi_info->msg_lock));
378
379
380 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
381 entry = smi_info->hp_xmit_msgs.next;
382 } else if (!list_empty(&(smi_info->xmit_msgs))) {
383 entry = smi_info->xmit_msgs.next;
384 }
385
386 if (!entry) {
387 smi_info->curr_msg = NULL;
388 rv = SI_SM_IDLE;
389 } else {
390 int err;
391
392 list_del(entry);
393 smi_info->curr_msg = list_entry(entry,
394 struct ipmi_smi_msg,
395 link);
396#ifdef DEBUG_TIMING
397 do_gettimeofday(&t);
398 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
399#endif
400 err = atomic_notifier_call_chain(&xaction_notifier_list,
401 0, smi_info);
402 if (err & NOTIFY_STOP_MASK) {
403 rv = SI_SM_CALL_WITHOUT_DELAY;
404 goto out;
405 }
406 err = smi_info->handlers->start_transaction(
407 smi_info->si_sm,
408 smi_info->curr_msg->data,
409 smi_info->curr_msg->data_size);
410 if (err)
411 return_hosed_msg(smi_info, err);
412
413 rv = SI_SM_CALL_WITHOUT_DELAY;
414 }
415 out:
416 if (!smi_info->run_to_completion)
417 spin_unlock(&(smi_info->msg_lock));
418
419 return rv;
420}
421
422static void start_enable_irq(struct smi_info *smi_info)
423{
424 unsigned char msg[2];
425
426
427
428
429
430 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
431 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
432
433 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
434 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
435}
436
437static void start_disable_irq(struct smi_info *smi_info)
438{
439 unsigned char msg[2];
440
441 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
442 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
443
444 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
445 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
446}
447
448static void start_clear_flags(struct smi_info *smi_info)
449{
450 unsigned char msg[3];
451
452
453 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
454 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
455 msg[2] = WDT_PRE_TIMEOUT_INT;
456
457 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
458 smi_info->si_state = SI_CLEARING_FLAGS;
459}
460
461
462
463
464
465
466
467static inline void disable_si_irq(struct smi_info *smi_info)
468{
469 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
470 start_disable_irq(smi_info);
471 smi_info->interrupt_disabled = 1;
472 if (!atomic_read(&smi_info->stop_operation))
473 mod_timer(&smi_info->si_timer,
474 jiffies + SI_TIMEOUT_JIFFIES);
475 }
476}
477
478static inline void enable_si_irq(struct smi_info *smi_info)
479{
480 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
481 start_enable_irq(smi_info);
482 smi_info->interrupt_disabled = 0;
483 }
484}
485
486static void handle_flags(struct smi_info *smi_info)
487{
488 retry:
489 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
490
491 smi_inc_stat(smi_info, watchdog_pretimeouts);
492
493 start_clear_flags(smi_info);
494 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
495 spin_unlock(&(smi_info->si_lock));
496 ipmi_smi_watchdog_pretimeout(smi_info->intf);
497 spin_lock(&(smi_info->si_lock));
498 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
499
500 smi_info->curr_msg = ipmi_alloc_smi_msg();
501 if (!smi_info->curr_msg) {
502 disable_si_irq(smi_info);
503 smi_info->si_state = SI_NORMAL;
504 return;
505 }
506 enable_si_irq(smi_info);
507
508 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
509 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
510 smi_info->curr_msg->data_size = 2;
511
512 smi_info->handlers->start_transaction(
513 smi_info->si_sm,
514 smi_info->curr_msg->data,
515 smi_info->curr_msg->data_size);
516 smi_info->si_state = SI_GETTING_MESSAGES;
517 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
518
519 smi_info->curr_msg = ipmi_alloc_smi_msg();
520 if (!smi_info->curr_msg) {
521 disable_si_irq(smi_info);
522 smi_info->si_state = SI_NORMAL;
523 return;
524 }
525 enable_si_irq(smi_info);
526
527 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
528 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
529 smi_info->curr_msg->data_size = 2;
530
531 smi_info->handlers->start_transaction(
532 smi_info->si_sm,
533 smi_info->curr_msg->data,
534 smi_info->curr_msg->data_size);
535 smi_info->si_state = SI_GETTING_EVENTS;
536 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
537 smi_info->oem_data_avail_handler) {
538 if (smi_info->oem_data_avail_handler(smi_info))
539 goto retry;
540 } else
541 smi_info->si_state = SI_NORMAL;
542}
543
544static void handle_transaction_done(struct smi_info *smi_info)
545{
546 struct ipmi_smi_msg *msg;
547#ifdef DEBUG_TIMING
548 struct timeval t;
549
550 do_gettimeofday(&t);
551 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
552#endif
553 switch (smi_info->si_state) {
554 case SI_NORMAL:
555 if (!smi_info->curr_msg)
556 break;
557
558 smi_info->curr_msg->rsp_size
559 = smi_info->handlers->get_result(
560 smi_info->si_sm,
561 smi_info->curr_msg->rsp,
562 IPMI_MAX_MSG_LENGTH);
563
564
565
566
567
568
569 msg = smi_info->curr_msg;
570 smi_info->curr_msg = NULL;
571 deliver_recv_msg(smi_info, msg);
572 break;
573
574 case SI_GETTING_FLAGS:
575 {
576 unsigned char msg[4];
577 unsigned int len;
578
579
580 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
581 if (msg[2] != 0) {
582
583 smi_info->si_state = SI_NORMAL;
584 } else if (len < 4) {
585
586
587
588
589 smi_info->si_state = SI_NORMAL;
590 } else {
591 smi_info->msg_flags = msg[3];
592 handle_flags(smi_info);
593 }
594 break;
595 }
596
597 case SI_CLEARING_FLAGS:
598 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
599 {
600 unsigned char msg[3];
601
602
603 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
604 if (msg[2] != 0) {
605
606 dev_warn(smi_info->dev,
607 "Error clearing flags: %2.2x\n", msg[2]);
608 }
609 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
610 start_enable_irq(smi_info);
611 else
612 smi_info->si_state = SI_NORMAL;
613 break;
614 }
615
616 case SI_GETTING_EVENTS:
617 {
618 smi_info->curr_msg->rsp_size
619 = smi_info->handlers->get_result(
620 smi_info->si_sm,
621 smi_info->curr_msg->rsp,
622 IPMI_MAX_MSG_LENGTH);
623
624
625
626
627
628
629 msg = smi_info->curr_msg;
630 smi_info->curr_msg = NULL;
631 if (msg->rsp[2] != 0) {
632
633 msg->done(msg);
634
635
636 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
637 handle_flags(smi_info);
638 } else {
639 smi_inc_stat(smi_info, events);
640
641
642
643
644
645
646
647 handle_flags(smi_info);
648
649 deliver_recv_msg(smi_info, msg);
650 }
651 break;
652 }
653
654 case SI_GETTING_MESSAGES:
655 {
656 smi_info->curr_msg->rsp_size
657 = smi_info->handlers->get_result(
658 smi_info->si_sm,
659 smi_info->curr_msg->rsp,
660 IPMI_MAX_MSG_LENGTH);
661
662
663
664
665
666
667 msg = smi_info->curr_msg;
668 smi_info->curr_msg = NULL;
669 if (msg->rsp[2] != 0) {
670
671 msg->done(msg);
672
673
674 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
675 handle_flags(smi_info);
676 } else {
677 smi_inc_stat(smi_info, incoming_messages);
678
679
680
681
682
683
684
685 handle_flags(smi_info);
686
687 deliver_recv_msg(smi_info, msg);
688 }
689 break;
690 }
691
692 case SI_ENABLE_INTERRUPTS1:
693 {
694 unsigned char msg[4];
695
696
697 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
698 if (msg[2] != 0) {
699 dev_warn(smi_info->dev, "Could not enable interrupts"
700 ", failed get, using polled mode.\n");
701 smi_info->si_state = SI_NORMAL;
702 } else {
703 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
704 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
705 msg[2] = (msg[3] |
706 IPMI_BMC_RCV_MSG_INTR |
707 IPMI_BMC_EVT_MSG_INTR);
708 smi_info->handlers->start_transaction(
709 smi_info->si_sm, msg, 3);
710 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
711 }
712 break;
713 }
714
715 case SI_ENABLE_INTERRUPTS2:
716 {
717 unsigned char msg[4];
718
719
720 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
721 if (msg[2] != 0)
722 dev_warn(smi_info->dev, "Could not enable interrupts"
723 ", failed set, using polled mode.\n");
724 else
725 smi_info->interrupt_disabled = 0;
726 smi_info->si_state = SI_NORMAL;
727 break;
728 }
729
730 case SI_DISABLE_INTERRUPTS1:
731 {
732 unsigned char msg[4];
733
734
735 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
736 if (msg[2] != 0) {
737 dev_warn(smi_info->dev, "Could not disable interrupts"
738 ", failed get.\n");
739 smi_info->si_state = SI_NORMAL;
740 } else {
741 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
742 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
743 msg[2] = (msg[3] &
744 ~(IPMI_BMC_RCV_MSG_INTR |
745 IPMI_BMC_EVT_MSG_INTR));
746 smi_info->handlers->start_transaction(
747 smi_info->si_sm, msg, 3);
748 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
749 }
750 break;
751 }
752
753 case SI_DISABLE_INTERRUPTS2:
754 {
755 unsigned char msg[4];
756
757
758 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
759 if (msg[2] != 0) {
760 dev_warn(smi_info->dev, "Could not disable interrupts"
761 ", failed set.\n");
762 }
763 smi_info->si_state = SI_NORMAL;
764 break;
765 }
766 }
767}
768
769
770
771
772
773
774static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
775 int time)
776{
777 enum si_sm_result si_sm_result;
778
779 restart:
780
781
782
783
784
785
786
787
788 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
789 time = 0;
790 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
791 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
792
793 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
794 smi_inc_stat(smi_info, complete_transactions);
795
796 handle_transaction_done(smi_info);
797 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
798 } else if (si_sm_result == SI_SM_HOSED) {
799 smi_inc_stat(smi_info, hosed_count);
800
801
802
803
804
805 smi_info->si_state = SI_NORMAL;
806 if (smi_info->curr_msg != NULL) {
807
808
809
810
811
812 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
813 }
814 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
815 }
816
817
818
819
820
821 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
822 unsigned char msg[2];
823
824 smi_inc_stat(smi_info, attentions);
825
826
827
828
829
830
831
832
833 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
834 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
835
836 smi_info->handlers->start_transaction(
837 smi_info->si_sm, msg, 2);
838 smi_info->si_state = SI_GETTING_FLAGS;
839 goto restart;
840 }
841
842
843 if (si_sm_result == SI_SM_IDLE) {
844 smi_inc_stat(smi_info, idles);
845
846 si_sm_result = start_next_msg(smi_info);
847 if (si_sm_result != SI_SM_IDLE)
848 goto restart;
849 }
850
851 if ((si_sm_result == SI_SM_IDLE)
852 && (atomic_read(&smi_info->req_events))) {
853
854
855
856
857 atomic_set(&smi_info->req_events, 0);
858
859 smi_info->curr_msg = ipmi_alloc_smi_msg();
860 if (!smi_info->curr_msg)
861 goto out;
862
863 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
864 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
865 smi_info->curr_msg->data_size = 2;
866
867 smi_info->handlers->start_transaction(
868 smi_info->si_sm,
869 smi_info->curr_msg->data,
870 smi_info->curr_msg->data_size);
871 smi_info->si_state = SI_GETTING_EVENTS;
872 goto restart;
873 }
874 out:
875 return si_sm_result;
876}
877
878static void sender(void *send_info,
879 struct ipmi_smi_msg *msg,
880 int priority)
881{
882 struct smi_info *smi_info = send_info;
883 enum si_sm_result result;
884 unsigned long flags;
885#ifdef DEBUG_TIMING
886 struct timeval t;
887#endif
888
889 if (atomic_read(&smi_info->stop_operation)) {
890 msg->rsp[0] = msg->data[0] | 4;
891 msg->rsp[1] = msg->data[1];
892 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
893 msg->rsp_size = 3;
894 deliver_recv_msg(smi_info, msg);
895 return;
896 }
897
898#ifdef DEBUG_TIMING
899 do_gettimeofday(&t);
900 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
901#endif
902
903
904
905
906
907
908
909 smi_info->last_timeout_jiffies = jiffies;
910
911 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
912
913 if (smi_info->thread)
914 wake_up_process(smi_info->thread);
915
916 if (smi_info->run_to_completion) {
917
918
919
920
921
922
923
924
925
926
927 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
928
929 result = smi_event_handler(smi_info, 0);
930 while (result != SI_SM_IDLE) {
931 udelay(SI_SHORT_TIMEOUT_USEC);
932 result = smi_event_handler(smi_info,
933 SI_SHORT_TIMEOUT_USEC);
934 }
935 return;
936 }
937
938 spin_lock_irqsave(&smi_info->msg_lock, flags);
939 if (priority > 0)
940 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
941 else
942 list_add_tail(&msg->link, &smi_info->xmit_msgs);
943 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
944
945 spin_lock_irqsave(&smi_info->si_lock, flags);
946 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
947 start_next_msg(smi_info);
948 spin_unlock_irqrestore(&smi_info->si_lock, flags);
949}
950
951static void set_run_to_completion(void *send_info, int i_run_to_completion)
952{
953 struct smi_info *smi_info = send_info;
954 enum si_sm_result result;
955
956 smi_info->run_to_completion = i_run_to_completion;
957 if (i_run_to_completion) {
958 result = smi_event_handler(smi_info, 0);
959 while (result != SI_SM_IDLE) {
960 udelay(SI_SHORT_TIMEOUT_USEC);
961 result = smi_event_handler(smi_info,
962 SI_SHORT_TIMEOUT_USEC);
963 }
964 }
965}
966
967
968
969
970
971
972static inline void ipmi_si_set_not_busy(struct timespec *ts)
973{
974 ts->tv_nsec = -1;
975}
976static inline int ipmi_si_is_busy(struct timespec *ts)
977{
978 return ts->tv_nsec != -1;
979}
980
981static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
982 const struct smi_info *smi_info,
983 struct timespec *busy_until)
984{
985 unsigned int max_busy_us = 0;
986
987 if (smi_info->intf_num < num_max_busy_us)
988 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
989 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
990 ipmi_si_set_not_busy(busy_until);
991 else if (!ipmi_si_is_busy(busy_until)) {
992 getnstimeofday(busy_until);
993 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
994 } else {
995 struct timespec now;
996 getnstimeofday(&now);
997 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
998 ipmi_si_set_not_busy(busy_until);
999 return 0;
1000 }
1001 }
1002 return 1;
1003}
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015static int ipmi_thread(void *data)
1016{
1017 struct smi_info *smi_info = data;
1018 unsigned long flags;
1019 enum si_sm_result smi_result;
1020 struct timespec busy_until;
1021
1022 ipmi_si_set_not_busy(&busy_until);
1023 set_user_nice(current, 19);
1024 while (!kthread_should_stop()) {
1025 int busy_wait;
1026
1027 spin_lock_irqsave(&(smi_info->si_lock), flags);
1028 smi_result = smi_event_handler(smi_info, 0);
1029 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1030 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1031 &busy_until);
1032 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1033 ;
1034 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1035 schedule();
1036 else if (smi_result == SI_SM_IDLE)
1037 schedule_timeout_interruptible(100);
1038 else
1039 schedule_timeout_interruptible(1);
1040 }
1041 return 0;
1042}
1043
1044
1045static void poll(void *send_info)
1046{
1047 struct smi_info *smi_info = send_info;
1048 unsigned long flags;
1049
1050
1051
1052
1053
1054 udelay(10);
1055 spin_lock_irqsave(&smi_info->si_lock, flags);
1056 smi_event_handler(smi_info, 10);
1057 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1058}
1059
1060static void request_events(void *send_info)
1061{
1062 struct smi_info *smi_info = send_info;
1063
1064 if (atomic_read(&smi_info->stop_operation) ||
1065 !smi_info->has_event_buffer)
1066 return;
1067
1068 atomic_set(&smi_info->req_events, 1);
1069}
1070
1071static int initialized;
1072
1073static void smi_timeout(unsigned long data)
1074{
1075 struct smi_info *smi_info = (struct smi_info *) data;
1076 enum si_sm_result smi_result;
1077 unsigned long flags;
1078 unsigned long jiffies_now;
1079 long time_diff;
1080 long timeout;
1081#ifdef DEBUG_TIMING
1082 struct timeval t;
1083#endif
1084
1085 spin_lock_irqsave(&(smi_info->si_lock), flags);
1086#ifdef DEBUG_TIMING
1087 do_gettimeofday(&t);
1088 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1089#endif
1090 jiffies_now = jiffies;
1091 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1092 * SI_USEC_PER_JIFFY);
1093 smi_result = smi_event_handler(smi_info, time_diff);
1094
1095 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1096
1097 smi_info->last_timeout_jiffies = jiffies_now;
1098
1099 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1100
1101 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1102 smi_inc_stat(smi_info, long_timeouts);
1103 goto do_mod_timer;
1104 }
1105
1106
1107
1108
1109
1110 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1111 smi_inc_stat(smi_info, short_timeouts);
1112 timeout = jiffies + 1;
1113 } else {
1114 smi_inc_stat(smi_info, long_timeouts);
1115 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1116 }
1117
1118 do_mod_timer:
1119 if (smi_result != SI_SM_IDLE)
1120 mod_timer(&(smi_info->si_timer), timeout);
1121}
1122
1123static irqreturn_t si_irq_handler(int irq, void *data)
1124{
1125 struct smi_info *smi_info = data;
1126 unsigned long flags;
1127#ifdef DEBUG_TIMING
1128 struct timeval t;
1129#endif
1130
1131 spin_lock_irqsave(&(smi_info->si_lock), flags);
1132
1133 smi_inc_stat(smi_info, interrupts);
1134
1135#ifdef DEBUG_TIMING
1136 do_gettimeofday(&t);
1137 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1138#endif
1139 smi_event_handler(smi_info, 0);
1140 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1141 return IRQ_HANDLED;
1142}
1143
1144static irqreturn_t si_bt_irq_handler(int irq, void *data)
1145{
1146 struct smi_info *smi_info = data;
1147
1148 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1149 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1150 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1151 return si_irq_handler(irq, data);
1152}
1153
1154static int smi_start_processing(void *send_info,
1155 ipmi_smi_t intf)
1156{
1157 struct smi_info *new_smi = send_info;
1158 int enable = 0;
1159
1160 new_smi->intf = intf;
1161
1162
1163 if (new_smi->irq_setup)
1164 new_smi->irq_setup(new_smi);
1165
1166
1167 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1168 new_smi->last_timeout_jiffies = jiffies;
1169 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1170
1171
1172
1173
1174 if (new_smi->intf_num < num_force_kipmid)
1175 enable = force_kipmid[new_smi->intf_num];
1176
1177
1178
1179
1180 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1181 enable = 1;
1182
1183 if (enable) {
1184 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1185 "kipmi%d", new_smi->intf_num);
1186 if (IS_ERR(new_smi->thread)) {
1187 dev_notice(new_smi->dev, "Could not start"
1188 " kernel thread due to error %ld, only using"
1189 " timers to drive the interface\n",
1190 PTR_ERR(new_smi->thread));
1191 new_smi->thread = NULL;
1192 }
1193 }
1194
1195 return 0;
1196}
1197
1198static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1199{
1200 struct smi_info *smi = send_info;
1201
1202 data->addr_src = smi->addr_source;
1203 data->dev = smi->dev;
1204 data->addr_info = smi->addr_info;
1205 get_device(smi->dev);
1206
1207 return 0;
1208}
1209
1210static void set_maintenance_mode(void *send_info, int enable)
1211{
1212 struct smi_info *smi_info = send_info;
1213
1214 if (!enable)
1215 atomic_set(&smi_info->req_events, 0);
1216}
1217
1218static struct ipmi_smi_handlers handlers = {
1219 .owner = THIS_MODULE,
1220 .start_processing = smi_start_processing,
1221 .get_smi_info = get_smi_info,
1222 .sender = sender,
1223 .request_events = request_events,
1224 .set_maintenance_mode = set_maintenance_mode,
1225 .set_run_to_completion = set_run_to_completion,
1226 .poll = poll,
1227};
1228
1229
1230
1231
1232
1233
1234static LIST_HEAD(smi_infos);
1235static DEFINE_MUTEX(smi_infos_lock);
1236static int smi_num;
1237
1238#define DEFAULT_REGSPACING 1
1239#define DEFAULT_REGSIZE 1
1240
1241static int si_trydefaults = 1;
1242static char *si_type[SI_MAX_PARMS];
1243#define MAX_SI_TYPE_STR 30
1244static char si_type_str[MAX_SI_TYPE_STR];
1245static unsigned long addrs[SI_MAX_PARMS];
1246static unsigned int num_addrs;
1247static unsigned int ports[SI_MAX_PARMS];
1248static unsigned int num_ports;
1249static int irqs[SI_MAX_PARMS];
1250static unsigned int num_irqs;
1251static int regspacings[SI_MAX_PARMS];
1252static unsigned int num_regspacings;
1253static int regsizes[SI_MAX_PARMS];
1254static unsigned int num_regsizes;
1255static int regshifts[SI_MAX_PARMS];
1256static unsigned int num_regshifts;
1257static int slave_addrs[SI_MAX_PARMS];
1258static unsigned int num_slave_addrs;
1259
1260#define IPMI_IO_ADDR_SPACE 0
1261#define IPMI_MEM_ADDR_SPACE 1
1262static char *addr_space_to_str[] = { "i/o", "mem" };
1263
1264static int hotmod_handler(const char *val, struct kernel_param *kp);
1265
1266module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1267MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1268 " Documentation/IPMI.txt in the kernel sources for the"
1269 " gory details.");
1270
1271module_param_named(trydefaults, si_trydefaults, bool, 0);
1272MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1273 " default scan of the KCS and SMIC interface at the standard"
1274 " address");
1275module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1276MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1277 " interface separated by commas. The types are 'kcs',"
1278 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1279 " the first interface to kcs and the second to bt");
1280module_param_array(addrs, ulong, &num_addrs, 0);
1281MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1282 " addresses separated by commas. Only use if an interface"
1283 " is in memory. Otherwise, set it to zero or leave"
1284 " it blank.");
1285module_param_array(ports, uint, &num_ports, 0);
1286MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1287 " addresses separated by commas. Only use if an interface"
1288 " is a port. Otherwise, set it to zero or leave"
1289 " it blank.");
1290module_param_array(irqs, int, &num_irqs, 0);
1291MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1292 " addresses separated by commas. Only use if an interface"
1293 " has an interrupt. Otherwise, set it to zero or leave"
1294 " it blank.");
1295module_param_array(regspacings, int, &num_regspacings, 0);
1296MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1297 " and each successive register used by the interface. For"
1298 " instance, if the start address is 0xca2 and the spacing"
1299 " is 2, then the second address is at 0xca4. Defaults"
1300 " to 1.");
1301module_param_array(regsizes, int, &num_regsizes, 0);
1302MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1303 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1304 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1305 " the 8-bit IPMI register has to be read from a larger"
1306 " register.");
1307module_param_array(regshifts, int, &num_regshifts, 0);
1308MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1309 " IPMI register, in bits. For instance, if the data"
1310 " is read from a 32-bit word and the IPMI data is in"
1311 " bit 8-15, then the shift would be 8");
1312module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1313MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1314 " the controller. Normally this is 0x20, but can be"
1315 " overridden by this parm. This is an array indexed"
1316 " by interface number.");
1317module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1318MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1319 " disabled(0). Normally the IPMI driver auto-detects"
1320 " this, but the value may be overridden by this parm.");
1321module_param(unload_when_empty, int, 0);
1322MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1323 " specified or found, default is 1. Setting to 0"
1324 " is useful for hot add of devices using hotmod.");
1325module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1326MODULE_PARM_DESC(kipmid_max_busy_us,
1327 "Max time (in microseconds) to busy-wait for IPMI data before"
1328 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1329 " if kipmid is using up a lot of CPU time.");
1330
1331
1332static void std_irq_cleanup(struct smi_info *info)
1333{
1334 if (info->si_type == SI_BT)
1335
1336 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1337 free_irq(info->irq, info);
1338}
1339
1340static int std_irq_setup(struct smi_info *info)
1341{
1342 int rv;
1343
1344 if (!info->irq)
1345 return 0;
1346
1347 if (info->si_type == SI_BT) {
1348 rv = request_irq(info->irq,
1349 si_bt_irq_handler,
1350 IRQF_SHARED | IRQF_DISABLED,
1351 DEVICE_NAME,
1352 info);
1353 if (!rv)
1354
1355 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1356 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1357 } else
1358 rv = request_irq(info->irq,
1359 si_irq_handler,
1360 IRQF_SHARED | IRQF_DISABLED,
1361 DEVICE_NAME,
1362 info);
1363 if (rv) {
1364 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1365 " running polled\n",
1366 DEVICE_NAME, info->irq);
1367 info->irq = 0;
1368 } else {
1369 info->irq_cleanup = std_irq_cleanup;
1370 dev_info(info->dev, "Using irq %d\n", info->irq);
1371 }
1372
1373 return rv;
1374}
1375
1376static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1377{
1378 unsigned int addr = io->addr_data;
1379
1380 return inb(addr + (offset * io->regspacing));
1381}
1382
1383static void port_outb(struct si_sm_io *io, unsigned int offset,
1384 unsigned char b)
1385{
1386 unsigned int addr = io->addr_data;
1387
1388 outb(b, addr + (offset * io->regspacing));
1389}
1390
1391static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1392{
1393 unsigned int addr = io->addr_data;
1394
1395 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1396}
1397
1398static void port_outw(struct si_sm_io *io, unsigned int offset,
1399 unsigned char b)
1400{
1401 unsigned int addr = io->addr_data;
1402
1403 outw(b << io->regshift, addr + (offset * io->regspacing));
1404}
1405
1406static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1407{
1408 unsigned int addr = io->addr_data;
1409
1410 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1411}
1412
1413static void port_outl(struct si_sm_io *io, unsigned int offset,
1414 unsigned char b)
1415{
1416 unsigned int addr = io->addr_data;
1417
1418 outl(b << io->regshift, addr+(offset * io->regspacing));
1419}
1420
1421static void port_cleanup(struct smi_info *info)
1422{
1423 unsigned int addr = info->io.addr_data;
1424 int idx;
1425
1426 if (addr) {
1427 for (idx = 0; idx < info->io_size; idx++)
1428 release_region(addr + idx * info->io.regspacing,
1429 info->io.regsize);
1430 }
1431}
1432
1433static int port_setup(struct smi_info *info)
1434{
1435 unsigned int addr = info->io.addr_data;
1436 int idx;
1437
1438 if (!addr)
1439 return -ENODEV;
1440
1441 info->io_cleanup = port_cleanup;
1442
1443
1444
1445
1446
1447 switch (info->io.regsize) {
1448 case 1:
1449 info->io.inputb = port_inb;
1450 info->io.outputb = port_outb;
1451 break;
1452 case 2:
1453 info->io.inputb = port_inw;
1454 info->io.outputb = port_outw;
1455 break;
1456 case 4:
1457 info->io.inputb = port_inl;
1458 info->io.outputb = port_outl;
1459 break;
1460 default:
1461 dev_warn(info->dev, "Invalid register size: %d\n",
1462 info->io.regsize);
1463 return -EINVAL;
1464 }
1465
1466
1467
1468
1469
1470
1471
1472 for (idx = 0; idx < info->io_size; idx++) {
1473 if (request_region(addr + idx * info->io.regspacing,
1474 info->io.regsize, DEVICE_NAME) == NULL) {
1475
1476 while (idx--) {
1477 release_region(addr + idx * info->io.regspacing,
1478 info->io.regsize);
1479 }
1480 return -EIO;
1481 }
1482 }
1483 return 0;
1484}
1485
1486static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1487{
1488 return readb((io->addr)+(offset * io->regspacing));
1489}
1490
1491static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1492 unsigned char b)
1493{
1494 writeb(b, (io->addr)+(offset * io->regspacing));
1495}
1496
1497static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1498{
1499 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1500 & 0xff;
1501}
1502
1503static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1504 unsigned char b)
1505{
1506 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1507}
1508
1509static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1510{
1511 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1512 & 0xff;
1513}
1514
1515static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1516 unsigned char b)
1517{
1518 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1519}
1520
1521#ifdef readq
1522static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1523{
1524 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1525 & 0xff;
1526}
1527
1528static void mem_outq(struct si_sm_io *io, unsigned int offset,
1529 unsigned char b)
1530{
1531 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1532}
1533#endif
1534
1535static void mem_cleanup(struct smi_info *info)
1536{
1537 unsigned long addr = info->io.addr_data;
1538 int mapsize;
1539
1540 if (info->io.addr) {
1541 iounmap(info->io.addr);
1542
1543 mapsize = ((info->io_size * info->io.regspacing)
1544 - (info->io.regspacing - info->io.regsize));
1545
1546 release_mem_region(addr, mapsize);
1547 }
1548}
1549
1550static int mem_setup(struct smi_info *info)
1551{
1552 unsigned long addr = info->io.addr_data;
1553 int mapsize;
1554
1555 if (!addr)
1556 return -ENODEV;
1557
1558 info->io_cleanup = mem_cleanup;
1559
1560
1561
1562
1563
1564 switch (info->io.regsize) {
1565 case 1:
1566 info->io.inputb = intf_mem_inb;
1567 info->io.outputb = intf_mem_outb;
1568 break;
1569 case 2:
1570 info->io.inputb = intf_mem_inw;
1571 info->io.outputb = intf_mem_outw;
1572 break;
1573 case 4:
1574 info->io.inputb = intf_mem_inl;
1575 info->io.outputb = intf_mem_outl;
1576 break;
1577#ifdef readq
1578 case 8:
1579 info->io.inputb = mem_inq;
1580 info->io.outputb = mem_outq;
1581 break;
1582#endif
1583 default:
1584 dev_warn(info->dev, "Invalid register size: %d\n",
1585 info->io.regsize);
1586 return -EINVAL;
1587 }
1588
1589
1590
1591
1592
1593
1594
1595
1596 mapsize = ((info->io_size * info->io.regspacing)
1597 - (info->io.regspacing - info->io.regsize));
1598
1599 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1600 return -EIO;
1601
1602 info->io.addr = ioremap(addr, mapsize);
1603 if (info->io.addr == NULL) {
1604 release_mem_region(addr, mapsize);
1605 return -EIO;
1606 }
1607 return 0;
1608}
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620enum hotmod_op { HM_ADD, HM_REMOVE };
1621struct hotmod_vals {
1622 char *name;
1623 int val;
1624};
1625static struct hotmod_vals hotmod_ops[] = {
1626 { "add", HM_ADD },
1627 { "remove", HM_REMOVE },
1628 { NULL }
1629};
1630static struct hotmod_vals hotmod_si[] = {
1631 { "kcs", SI_KCS },
1632 { "smic", SI_SMIC },
1633 { "bt", SI_BT },
1634 { NULL }
1635};
1636static struct hotmod_vals hotmod_as[] = {
1637 { "mem", IPMI_MEM_ADDR_SPACE },
1638 { "i/o", IPMI_IO_ADDR_SPACE },
1639 { NULL }
1640};
1641
1642static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1643{
1644 char *s;
1645 int i;
1646
1647 s = strchr(*curr, ',');
1648 if (!s) {
1649 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1650 return -EINVAL;
1651 }
1652 *s = '\0';
1653 s++;
1654 for (i = 0; hotmod_ops[i].name; i++) {
1655 if (strcmp(*curr, v[i].name) == 0) {
1656 *val = v[i].val;
1657 *curr = s;
1658 return 0;
1659 }
1660 }
1661
1662 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1663 return -EINVAL;
1664}
1665
1666static int check_hotmod_int_op(const char *curr, const char *option,
1667 const char *name, int *val)
1668{
1669 char *n;
1670
1671 if (strcmp(curr, name) == 0) {
1672 if (!option) {
1673 printk(KERN_WARNING PFX
1674 "No option given for '%s'\n",
1675 curr);
1676 return -EINVAL;
1677 }
1678 *val = simple_strtoul(option, &n, 0);
1679 if ((*n != '\0') || (*option == '\0')) {
1680 printk(KERN_WARNING PFX
1681 "Bad option given for '%s'\n",
1682 curr);
1683 return -EINVAL;
1684 }
1685 return 1;
1686 }
1687 return 0;
1688}
1689
1690static struct smi_info *smi_info_alloc(void)
1691{
1692 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1693
1694 if (info) {
1695 spin_lock_init(&info->si_lock);
1696 spin_lock_init(&info->msg_lock);
1697 }
1698 return info;
1699}
1700
1701static int hotmod_handler(const char *val, struct kernel_param *kp)
1702{
1703 char *str = kstrdup(val, GFP_KERNEL);
1704 int rv;
1705 char *next, *curr, *s, *n, *o;
1706 enum hotmod_op op;
1707 enum si_type si_type;
1708 int addr_space;
1709 unsigned long addr;
1710 int regspacing;
1711 int regsize;
1712 int regshift;
1713 int irq;
1714 int ipmb;
1715 int ival;
1716 int len;
1717 struct smi_info *info;
1718
1719 if (!str)
1720 return -ENOMEM;
1721
1722
1723 len = strlen(str);
1724 ival = len - 1;
1725 while ((ival >= 0) && isspace(str[ival])) {
1726 str[ival] = '\0';
1727 ival--;
1728 }
1729
1730 for (curr = str; curr; curr = next) {
1731 regspacing = 1;
1732 regsize = 1;
1733 regshift = 0;
1734 irq = 0;
1735 ipmb = 0;
1736
1737 next = strchr(curr, ':');
1738 if (next) {
1739 *next = '\0';
1740 next++;
1741 }
1742
1743 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1744 if (rv)
1745 break;
1746 op = ival;
1747
1748 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1749 if (rv)
1750 break;
1751 si_type = ival;
1752
1753 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1754 if (rv)
1755 break;
1756
1757 s = strchr(curr, ',');
1758 if (s) {
1759 *s = '\0';
1760 s++;
1761 }
1762 addr = simple_strtoul(curr, &n, 0);
1763 if ((*n != '\0') || (*curr == '\0')) {
1764 printk(KERN_WARNING PFX "Invalid hotmod address"
1765 " '%s'\n", curr);
1766 break;
1767 }
1768
1769 while (s) {
1770 curr = s;
1771 s = strchr(curr, ',');
1772 if (s) {
1773 *s = '\0';
1774 s++;
1775 }
1776 o = strchr(curr, '=');
1777 if (o) {
1778 *o = '\0';
1779 o++;
1780 }
1781 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1782 if (rv < 0)
1783 goto out;
1784 else if (rv)
1785 continue;
1786 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1787 if (rv < 0)
1788 goto out;
1789 else if (rv)
1790 continue;
1791 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1792 if (rv < 0)
1793 goto out;
1794 else if (rv)
1795 continue;
1796 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1797 if (rv < 0)
1798 goto out;
1799 else if (rv)
1800 continue;
1801 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1802 if (rv < 0)
1803 goto out;
1804 else if (rv)
1805 continue;
1806
1807 rv = -EINVAL;
1808 printk(KERN_WARNING PFX
1809 "Invalid hotmod option '%s'\n",
1810 curr);
1811 goto out;
1812 }
1813
1814 if (op == HM_ADD) {
1815 info = smi_info_alloc();
1816 if (!info) {
1817 rv = -ENOMEM;
1818 goto out;
1819 }
1820
1821 info->addr_source = SI_HOTMOD;
1822 info->si_type = si_type;
1823 info->io.addr_data = addr;
1824 info->io.addr_type = addr_space;
1825 if (addr_space == IPMI_MEM_ADDR_SPACE)
1826 info->io_setup = mem_setup;
1827 else
1828 info->io_setup = port_setup;
1829
1830 info->io.addr = NULL;
1831 info->io.regspacing = regspacing;
1832 if (!info->io.regspacing)
1833 info->io.regspacing = DEFAULT_REGSPACING;
1834 info->io.regsize = regsize;
1835 if (!info->io.regsize)
1836 info->io.regsize = DEFAULT_REGSPACING;
1837 info->io.regshift = regshift;
1838 info->irq = irq;
1839 if (info->irq)
1840 info->irq_setup = std_irq_setup;
1841 info->slave_addr = ipmb;
1842
1843 if (!add_smi(info)) {
1844 if (try_smi_init(info))
1845 cleanup_one_si(info);
1846 } else {
1847 kfree(info);
1848 }
1849 } else {
1850
1851 struct smi_info *e, *tmp_e;
1852
1853 mutex_lock(&smi_infos_lock);
1854 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1855 if (e->io.addr_type != addr_space)
1856 continue;
1857 if (e->si_type != si_type)
1858 continue;
1859 if (e->io.addr_data == addr)
1860 cleanup_one_si(e);
1861 }
1862 mutex_unlock(&smi_infos_lock);
1863 }
1864 }
1865 rv = len;
1866 out:
1867 kfree(str);
1868 return rv;
1869}
1870
1871static void __devinit hardcode_find_bmc(void)
1872{
1873 int i;
1874 struct smi_info *info;
1875
1876 for (i = 0; i < SI_MAX_PARMS; i++) {
1877 if (!ports[i] && !addrs[i])
1878 continue;
1879
1880 info = smi_info_alloc();
1881 if (!info)
1882 return;
1883
1884 info->addr_source = SI_HARDCODED;
1885 printk(KERN_INFO PFX "probing via hardcoded address\n");
1886
1887 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1888 info->si_type = SI_KCS;
1889 } else if (strcmp(si_type[i], "smic") == 0) {
1890 info->si_type = SI_SMIC;
1891 } else if (strcmp(si_type[i], "bt") == 0) {
1892 info->si_type = SI_BT;
1893 } else {
1894 printk(KERN_WARNING PFX "Interface type specified "
1895 "for interface %d, was invalid: %s\n",
1896 i, si_type[i]);
1897 kfree(info);
1898 continue;
1899 }
1900
1901 if (ports[i]) {
1902
1903 info->io_setup = port_setup;
1904 info->io.addr_data = ports[i];
1905 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1906 } else if (addrs[i]) {
1907
1908 info->io_setup = mem_setup;
1909 info->io.addr_data = addrs[i];
1910 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1911 } else {
1912 printk(KERN_WARNING PFX "Interface type specified "
1913 "for interface %d, but port and address were "
1914 "not set or set to zero.\n", i);
1915 kfree(info);
1916 continue;
1917 }
1918
1919 info->io.addr = NULL;
1920 info->io.regspacing = regspacings[i];
1921 if (!info->io.regspacing)
1922 info->io.regspacing = DEFAULT_REGSPACING;
1923 info->io.regsize = regsizes[i];
1924 if (!info->io.regsize)
1925 info->io.regsize = DEFAULT_REGSPACING;
1926 info->io.regshift = regshifts[i];
1927 info->irq = irqs[i];
1928 if (info->irq)
1929 info->irq_setup = std_irq_setup;
1930 info->slave_addr = slave_addrs[i];
1931
1932 if (!add_smi(info)) {
1933 if (try_smi_init(info))
1934 cleanup_one_si(info);
1935 } else {
1936 kfree(info);
1937 }
1938 }
1939}
1940
1941#ifdef CONFIG_ACPI
1942
1943#include <linux/acpi.h>
1944
1945
1946
1947
1948
1949
1950static int acpi_failure;
1951
1952
1953static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
1954 u32 gpe_number, void *context)
1955{
1956 struct smi_info *smi_info = context;
1957 unsigned long flags;
1958#ifdef DEBUG_TIMING
1959 struct timeval t;
1960#endif
1961
1962 spin_lock_irqsave(&(smi_info->si_lock), flags);
1963
1964 smi_inc_stat(smi_info, interrupts);
1965
1966#ifdef DEBUG_TIMING
1967 do_gettimeofday(&t);
1968 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1969#endif
1970 smi_event_handler(smi_info, 0);
1971 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1972
1973 return ACPI_INTERRUPT_HANDLED;
1974}
1975
1976static void acpi_gpe_irq_cleanup(struct smi_info *info)
1977{
1978 if (!info->irq)
1979 return;
1980
1981 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1982}
1983
1984static int acpi_gpe_irq_setup(struct smi_info *info)
1985{
1986 acpi_status status;
1987
1988 if (!info->irq)
1989 return 0;
1990
1991
1992 status = acpi_install_gpe_handler(NULL,
1993 info->irq,
1994 ACPI_GPE_LEVEL_TRIGGERED,
1995 &ipmi_acpi_gpe,
1996 info);
1997 if (status != AE_OK) {
1998 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1999 " running polled\n", DEVICE_NAME, info->irq);
2000 info->irq = 0;
2001 return -EINVAL;
2002 } else {
2003 info->irq_cleanup = acpi_gpe_irq_cleanup;
2004 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
2005 return 0;
2006 }
2007}
2008
2009
2010
2011
2012
2013struct SPMITable {
2014 s8 Signature[4];
2015 u32 Length;
2016 u8 Revision;
2017 u8 Checksum;
2018 s8 OEMID[6];
2019 s8 OEMTableID[8];
2020 s8 OEMRevision[4];
2021 s8 CreatorID[4];
2022 s8 CreatorRevision[4];
2023 u8 InterfaceType;
2024 u8 IPMIlegacy;
2025 s16 SpecificationRevision;
2026
2027
2028
2029
2030
2031 u8 InterruptType;
2032
2033
2034
2035
2036
2037 u8 GPE;
2038
2039 s16 Reserved;
2040
2041
2042
2043
2044
2045 u32 GlobalSystemInterrupt;
2046
2047
2048 struct acpi_generic_address addr;
2049
2050 u8 UID[4];
2051
2052 s8 spmi_id[1];
2053};
2054
2055static int __devinit try_init_spmi(struct SPMITable *spmi)
2056{
2057 struct smi_info *info;
2058
2059 if (spmi->IPMIlegacy != 1) {
2060 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2061 return -ENODEV;
2062 }
2063
2064 info = smi_info_alloc();
2065 if (!info) {
2066 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2067 return -ENOMEM;
2068 }
2069
2070 info->addr_source = SI_SPMI;
2071 printk(KERN_INFO PFX "probing via SPMI\n");
2072
2073
2074 switch (spmi->InterfaceType) {
2075 case 1:
2076 info->si_type = SI_KCS;
2077 break;
2078 case 2:
2079 info->si_type = SI_SMIC;
2080 break;
2081 case 3:
2082 info->si_type = SI_BT;
2083 break;
2084 default:
2085 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2086 spmi->InterfaceType);
2087 kfree(info);
2088 return -EIO;
2089 }
2090
2091 if (spmi->InterruptType & 1) {
2092
2093 info->irq = spmi->GPE;
2094 info->irq_setup = acpi_gpe_irq_setup;
2095 } else if (spmi->InterruptType & 2) {
2096
2097 info->irq = spmi->GlobalSystemInterrupt;
2098 info->irq_setup = std_irq_setup;
2099 } else {
2100
2101 info->irq = 0;
2102 info->irq_setup = NULL;
2103 }
2104
2105 if (spmi->addr.bit_width) {
2106
2107 info->io.regspacing = spmi->addr.bit_width / 8;
2108 } else {
2109 info->io.regspacing = DEFAULT_REGSPACING;
2110 }
2111 info->io.regsize = info->io.regspacing;
2112 info->io.regshift = spmi->addr.bit_offset;
2113
2114 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2115 info->io_setup = mem_setup;
2116 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2117 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2118 info->io_setup = port_setup;
2119 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2120 } else {
2121 kfree(info);
2122 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2123 return -EIO;
2124 }
2125 info->io.addr_data = spmi->addr.address;
2126
2127 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2128 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2129 info->io.addr_data, info->io.regsize, info->io.regspacing,
2130 info->irq);
2131
2132 if (add_smi(info))
2133 kfree(info);
2134
2135 return 0;
2136}
2137
2138static void __devinit spmi_find_bmc(void)
2139{
2140 acpi_status status;
2141 struct SPMITable *spmi;
2142 int i;
2143
2144 if (acpi_disabled)
2145 return;
2146
2147 if (acpi_failure)
2148 return;
2149
2150 for (i = 0; ; i++) {
2151 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2152 (struct acpi_table_header **)&spmi);
2153 if (status != AE_OK)
2154 return;
2155
2156 try_init_spmi(spmi);
2157 }
2158}
2159
2160static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2161 const struct pnp_device_id *dev_id)
2162{
2163 struct acpi_device *acpi_dev;
2164 struct smi_info *info;
2165 struct resource *res, *res_second;
2166 acpi_handle handle;
2167 acpi_status status;
2168 unsigned long long tmp;
2169
2170 acpi_dev = pnp_acpi_device(dev);
2171 if (!acpi_dev)
2172 return -ENODEV;
2173
2174 info = smi_info_alloc();
2175 if (!info)
2176 return -ENOMEM;
2177
2178 info->addr_source = SI_ACPI;
2179 printk(KERN_INFO PFX "probing via ACPI\n");
2180
2181 handle = acpi_dev->handle;
2182 info->addr_info.acpi_info.acpi_handle = handle;
2183
2184
2185 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2186 if (ACPI_FAILURE(status))
2187 goto err_free;
2188
2189 switch (tmp) {
2190 case 1:
2191 info->si_type = SI_KCS;
2192 break;
2193 case 2:
2194 info->si_type = SI_SMIC;
2195 break;
2196 case 3:
2197 info->si_type = SI_BT;
2198 break;
2199 default:
2200 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2201 goto err_free;
2202 }
2203
2204 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2205 if (res) {
2206 info->io_setup = port_setup;
2207 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2208 } else {
2209 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2210 if (res) {
2211 info->io_setup = mem_setup;
2212 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2213 }
2214 }
2215 if (!res) {
2216 dev_err(&dev->dev, "no I/O or memory address\n");
2217 goto err_free;
2218 }
2219 info->io.addr_data = res->start;
2220
2221 info->io.regspacing = DEFAULT_REGSPACING;
2222 res_second = pnp_get_resource(dev,
2223 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2224 IORESOURCE_IO : IORESOURCE_MEM,
2225 1);
2226 if (res_second) {
2227 if (res_second->start > info->io.addr_data)
2228 info->io.regspacing = res_second->start - info->io.addr_data;
2229 }
2230 info->io.regsize = DEFAULT_REGSPACING;
2231 info->io.regshift = 0;
2232
2233
2234 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2235 if (ACPI_SUCCESS(status)) {
2236 info->irq = tmp;
2237 info->irq_setup = acpi_gpe_irq_setup;
2238 } else if (pnp_irq_valid(dev, 0)) {
2239 info->irq = pnp_irq(dev, 0);
2240 info->irq_setup = std_irq_setup;
2241 }
2242
2243 info->dev = &dev->dev;
2244 pnp_set_drvdata(dev, info);
2245
2246 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2247 res, info->io.regsize, info->io.regspacing,
2248 info->irq);
2249
2250 if (add_smi(info))
2251 goto err_free;
2252
2253 return 0;
2254
2255err_free:
2256 kfree(info);
2257 return -EINVAL;
2258}
2259
2260static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2261{
2262 struct smi_info *info = pnp_get_drvdata(dev);
2263
2264 cleanup_one_si(info);
2265}
2266
2267static const struct pnp_device_id pnp_dev_table[] = {
2268 {"IPI0001", 0},
2269 {"", 0},
2270};
2271
2272static struct pnp_driver ipmi_pnp_driver = {
2273 .name = DEVICE_NAME,
2274 .probe = ipmi_pnp_probe,
2275 .remove = __devexit_p(ipmi_pnp_remove),
2276 .id_table = pnp_dev_table,
2277};
2278#endif
2279
2280#ifdef CONFIG_DMI
2281struct dmi_ipmi_data {
2282 u8 type;
2283 u8 addr_space;
2284 unsigned long base_addr;
2285 u8 irq;
2286 u8 offset;
2287 u8 slave_addr;
2288};
2289
2290static int __devinit decode_dmi(const struct dmi_header *dm,
2291 struct dmi_ipmi_data *dmi)
2292{
2293 const u8 *data = (const u8 *)dm;
2294 unsigned long base_addr;
2295 u8 reg_spacing;
2296 u8 len = dm->length;
2297
2298 dmi->type = data[4];
2299
2300 memcpy(&base_addr, data+8, sizeof(unsigned long));
2301 if (len >= 0x11) {
2302 if (base_addr & 1) {
2303
2304 base_addr &= 0xFFFE;
2305 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2306 } else
2307
2308 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2309
2310
2311
2312 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2313
2314 dmi->irq = data[0x11];
2315
2316
2317 reg_spacing = (data[0x10] & 0xC0) >> 6;
2318 switch (reg_spacing) {
2319 case 0x00:
2320 dmi->offset = 1;
2321 break;
2322 case 0x01:
2323 dmi->offset = 4;
2324 break;
2325 case 0x02:
2326 dmi->offset = 16;
2327 break;
2328 default:
2329
2330 return -EIO;
2331 }
2332 } else {
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342 dmi->base_addr = base_addr & 0xfffe;
2343 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2344 dmi->offset = 1;
2345 }
2346
2347 dmi->slave_addr = data[6];
2348
2349 return 0;
2350}
2351
2352static void __devinit try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2353{
2354 struct smi_info *info;
2355
2356 info = smi_info_alloc();
2357 if (!info) {
2358 printk(KERN_ERR PFX "Could not allocate SI data\n");
2359 return;
2360 }
2361
2362 info->addr_source = SI_SMBIOS;
2363 printk(KERN_INFO PFX "probing via SMBIOS\n");
2364
2365 switch (ipmi_data->type) {
2366 case 0x01:
2367 info->si_type = SI_KCS;
2368 break;
2369 case 0x02:
2370 info->si_type = SI_SMIC;
2371 break;
2372 case 0x03:
2373 info->si_type = SI_BT;
2374 break;
2375 default:
2376 kfree(info);
2377 return;
2378 }
2379
2380 switch (ipmi_data->addr_space) {
2381 case IPMI_MEM_ADDR_SPACE:
2382 info->io_setup = mem_setup;
2383 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2384 break;
2385
2386 case IPMI_IO_ADDR_SPACE:
2387 info->io_setup = port_setup;
2388 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2389 break;
2390
2391 default:
2392 kfree(info);
2393 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2394 ipmi_data->addr_space);
2395 return;
2396 }
2397 info->io.addr_data = ipmi_data->base_addr;
2398
2399 info->io.regspacing = ipmi_data->offset;
2400 if (!info->io.regspacing)
2401 info->io.regspacing = DEFAULT_REGSPACING;
2402 info->io.regsize = DEFAULT_REGSPACING;
2403 info->io.regshift = 0;
2404
2405 info->slave_addr = ipmi_data->slave_addr;
2406
2407 info->irq = ipmi_data->irq;
2408 if (info->irq)
2409 info->irq_setup = std_irq_setup;
2410
2411 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2412 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2413 info->io.addr_data, info->io.regsize, info->io.regspacing,
2414 info->irq);
2415
2416 if (add_smi(info))
2417 kfree(info);
2418}
2419
2420static void __devinit dmi_find_bmc(void)
2421{
2422 const struct dmi_device *dev = NULL;
2423 struct dmi_ipmi_data data;
2424 int rv;
2425
2426 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2427 memset(&data, 0, sizeof(data));
2428 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2429 &data);
2430 if (!rv)
2431 try_init_dmi(&data);
2432 }
2433}
2434#endif
2435
2436#ifdef CONFIG_PCI
2437
2438#define PCI_ERMC_CLASSCODE 0x0C0700
2439#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2440#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2441#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2442#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2443#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2444
2445#define PCI_HP_VENDOR_ID 0x103C
2446#define PCI_MMC_DEVICE_ID 0x121A
2447#define PCI_MMC_ADDR_CW 0x10
2448
2449static void ipmi_pci_cleanup(struct smi_info *info)
2450{
2451 struct pci_dev *pdev = info->addr_source_data;
2452
2453 pci_disable_device(pdev);
2454}
2455
2456static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2457 const struct pci_device_id *ent)
2458{
2459 int rv;
2460 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2461 struct smi_info *info;
2462
2463 info = smi_info_alloc();
2464 if (!info)
2465 return -ENOMEM;
2466
2467 info->addr_source = SI_PCI;
2468 dev_info(&pdev->dev, "probing via PCI");
2469
2470 switch (class_type) {
2471 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2472 info->si_type = SI_SMIC;
2473 break;
2474
2475 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2476 info->si_type = SI_KCS;
2477 break;
2478
2479 case PCI_ERMC_CLASSCODE_TYPE_BT:
2480 info->si_type = SI_BT;
2481 break;
2482
2483 default:
2484 kfree(info);
2485 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2486 return -ENOMEM;
2487 }
2488
2489 rv = pci_enable_device(pdev);
2490 if (rv) {
2491 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2492 kfree(info);
2493 return rv;
2494 }
2495
2496 info->addr_source_cleanup = ipmi_pci_cleanup;
2497 info->addr_source_data = pdev;
2498
2499 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2500 info->io_setup = port_setup;
2501 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2502 } else {
2503 info->io_setup = mem_setup;
2504 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2505 }
2506 info->io.addr_data = pci_resource_start(pdev, 0);
2507
2508 info->io.regspacing = DEFAULT_REGSPACING;
2509 info->io.regsize = DEFAULT_REGSPACING;
2510 info->io.regshift = 0;
2511
2512 info->irq = pdev->irq;
2513 if (info->irq)
2514 info->irq_setup = std_irq_setup;
2515
2516 info->dev = &pdev->dev;
2517 pci_set_drvdata(pdev, info);
2518
2519 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2520 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2521 info->irq);
2522
2523 if (add_smi(info))
2524 kfree(info);
2525
2526 return 0;
2527}
2528
2529static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2530{
2531 struct smi_info *info = pci_get_drvdata(pdev);
2532 cleanup_one_si(info);
2533}
2534
2535#ifdef CONFIG_PM
2536static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2537{
2538 return 0;
2539}
2540
2541static int ipmi_pci_resume(struct pci_dev *pdev)
2542{
2543 return 0;
2544}
2545#endif
2546
2547static struct pci_device_id ipmi_pci_devices[] = {
2548 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2549 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2550 { 0, }
2551};
2552MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2553
2554static struct pci_driver ipmi_pci_driver = {
2555 .name = DEVICE_NAME,
2556 .id_table = ipmi_pci_devices,
2557 .probe = ipmi_pci_probe,
2558 .remove = __devexit_p(ipmi_pci_remove),
2559#ifdef CONFIG_PM
2560 .suspend = ipmi_pci_suspend,
2561 .resume = ipmi_pci_resume,
2562#endif
2563};
2564#endif
2565
2566
2567#ifdef CONFIG_PPC_OF
2568static int __devinit ipmi_of_probe(struct platform_device *dev,
2569 const struct of_device_id *match)
2570{
2571 struct smi_info *info;
2572 struct resource resource;
2573 const __be32 *regsize, *regspacing, *regshift;
2574 struct device_node *np = dev->dev.of_node;
2575 int ret;
2576 int proplen;
2577
2578 dev_info(&dev->dev, "probing via device tree\n");
2579
2580 ret = of_address_to_resource(np, 0, &resource);
2581 if (ret) {
2582 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2583 return ret;
2584 }
2585
2586 regsize = of_get_property(np, "reg-size", &proplen);
2587 if (regsize && proplen != 4) {
2588 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2589 return -EINVAL;
2590 }
2591
2592 regspacing = of_get_property(np, "reg-spacing", &proplen);
2593 if (regspacing && proplen != 4) {
2594 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2595 return -EINVAL;
2596 }
2597
2598 regshift = of_get_property(np, "reg-shift", &proplen);
2599 if (regshift && proplen != 4) {
2600 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2601 return -EINVAL;
2602 }
2603
2604 info = smi_info_alloc();
2605
2606 if (!info) {
2607 dev_err(&dev->dev,
2608 "could not allocate memory for OF probe\n");
2609 return -ENOMEM;
2610 }
2611
2612 info->si_type = (enum si_type) match->data;
2613 info->addr_source = SI_DEVICETREE;
2614 info->irq_setup = std_irq_setup;
2615
2616 if (resource.flags & IORESOURCE_IO) {
2617 info->io_setup = port_setup;
2618 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2619 } else {
2620 info->io_setup = mem_setup;
2621 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2622 }
2623
2624 info->io.addr_data = resource.start;
2625
2626 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2627 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2628 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2629
2630 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2631 info->dev = &dev->dev;
2632
2633 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2634 info->io.addr_data, info->io.regsize, info->io.regspacing,
2635 info->irq);
2636
2637 dev_set_drvdata(&dev->dev, info);
2638
2639 if (add_smi(info)) {
2640 kfree(info);
2641 return -EBUSY;
2642 }
2643
2644 return 0;
2645}
2646
2647static int __devexit ipmi_of_remove(struct platform_device *dev)
2648{
2649 cleanup_one_si(dev_get_drvdata(&dev->dev));
2650 return 0;
2651}
2652
2653static struct of_device_id ipmi_match[] =
2654{
2655 { .type = "ipmi", .compatible = "ipmi-kcs",
2656 .data = (void *)(unsigned long) SI_KCS },
2657 { .type = "ipmi", .compatible = "ipmi-smic",
2658 .data = (void *)(unsigned long) SI_SMIC },
2659 { .type = "ipmi", .compatible = "ipmi-bt",
2660 .data = (void *)(unsigned long) SI_BT },
2661 {},
2662};
2663
2664static struct of_platform_driver ipmi_of_platform_driver = {
2665 .driver = {
2666 .name = "ipmi",
2667 .owner = THIS_MODULE,
2668 .of_match_table = ipmi_match,
2669 },
2670 .probe = ipmi_of_probe,
2671 .remove = __devexit_p(ipmi_of_remove),
2672};
2673#endif
2674
2675static int wait_for_msg_done(struct smi_info *smi_info)
2676{
2677 enum si_sm_result smi_result;
2678
2679 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2680 for (;;) {
2681 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2682 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2683 schedule_timeout_uninterruptible(1);
2684 smi_result = smi_info->handlers->event(
2685 smi_info->si_sm, 100);
2686 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2687 smi_result = smi_info->handlers->event(
2688 smi_info->si_sm, 0);
2689 } else
2690 break;
2691 }
2692 if (smi_result == SI_SM_HOSED)
2693
2694
2695
2696
2697 return -ENODEV;
2698
2699 return 0;
2700}
2701
2702static int try_get_dev_id(struct smi_info *smi_info)
2703{
2704 unsigned char msg[2];
2705 unsigned char *resp;
2706 unsigned long resp_len;
2707 int rv = 0;
2708
2709 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2710 if (!resp)
2711 return -ENOMEM;
2712
2713
2714
2715
2716
2717 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2718 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2719 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2720
2721 rv = wait_for_msg_done(smi_info);
2722 if (rv)
2723 goto out;
2724
2725 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2726 resp, IPMI_MAX_MSG_LENGTH);
2727
2728
2729 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2730
2731 out:
2732 kfree(resp);
2733 return rv;
2734}
2735
2736static int try_enable_event_buffer(struct smi_info *smi_info)
2737{
2738 unsigned char msg[3];
2739 unsigned char *resp;
2740 unsigned long resp_len;
2741 int rv = 0;
2742
2743 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2744 if (!resp)
2745 return -ENOMEM;
2746
2747 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2748 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2749 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2750
2751 rv = wait_for_msg_done(smi_info);
2752 if (rv) {
2753 printk(KERN_WARNING PFX "Error getting response from get"
2754 " global enables command, the event buffer is not"
2755 " enabled.\n");
2756 goto out;
2757 }
2758
2759 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2760 resp, IPMI_MAX_MSG_LENGTH);
2761
2762 if (resp_len < 4 ||
2763 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2764 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2765 resp[2] != 0) {
2766 printk(KERN_WARNING PFX "Invalid return from get global"
2767 " enables command, cannot enable the event buffer.\n");
2768 rv = -EINVAL;
2769 goto out;
2770 }
2771
2772 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2773
2774 goto out;
2775
2776 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2777 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2778 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2779 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2780
2781 rv = wait_for_msg_done(smi_info);
2782 if (rv) {
2783 printk(KERN_WARNING PFX "Error getting response from set"
2784 " global, enables command, the event buffer is not"
2785 " enabled.\n");
2786 goto out;
2787 }
2788
2789 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2790 resp, IPMI_MAX_MSG_LENGTH);
2791
2792 if (resp_len < 3 ||
2793 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2794 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2795 printk(KERN_WARNING PFX "Invalid return from get global,"
2796 "enables command, not enable the event buffer.\n");
2797 rv = -EINVAL;
2798 goto out;
2799 }
2800
2801 if (resp[2] != 0)
2802
2803
2804
2805
2806 rv = -ENOENT;
2807 out:
2808 kfree(resp);
2809 return rv;
2810}
2811
2812static int type_file_read_proc(char *page, char **start, off_t off,
2813 int count, int *eof, void *data)
2814{
2815 struct smi_info *smi = data;
2816
2817 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
2818}
2819
2820static int stat_file_read_proc(char *page, char **start, off_t off,
2821 int count, int *eof, void *data)
2822{
2823 char *out = (char *) page;
2824 struct smi_info *smi = data;
2825
2826 out += sprintf(out, "interrupts_enabled: %d\n",
2827 smi->irq && !smi->interrupt_disabled);
2828 out += sprintf(out, "short_timeouts: %u\n",
2829 smi_get_stat(smi, short_timeouts));
2830 out += sprintf(out, "long_timeouts: %u\n",
2831 smi_get_stat(smi, long_timeouts));
2832 out += sprintf(out, "idles: %u\n",
2833 smi_get_stat(smi, idles));
2834 out += sprintf(out, "interrupts: %u\n",
2835 smi_get_stat(smi, interrupts));
2836 out += sprintf(out, "attentions: %u\n",
2837 smi_get_stat(smi, attentions));
2838 out += sprintf(out, "flag_fetches: %u\n",
2839 smi_get_stat(smi, flag_fetches));
2840 out += sprintf(out, "hosed_count: %u\n",
2841 smi_get_stat(smi, hosed_count));
2842 out += sprintf(out, "complete_transactions: %u\n",
2843 smi_get_stat(smi, complete_transactions));
2844 out += sprintf(out, "events: %u\n",
2845 smi_get_stat(smi, events));
2846 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2847 smi_get_stat(smi, watchdog_pretimeouts));
2848 out += sprintf(out, "incoming_messages: %u\n",
2849 smi_get_stat(smi, incoming_messages));
2850
2851 return out - page;
2852}
2853
2854static int param_read_proc(char *page, char **start, off_t off,
2855 int count, int *eof, void *data)
2856{
2857 struct smi_info *smi = data;
2858
2859 return sprintf(page,
2860 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2861 si_to_str[smi->si_type],
2862 addr_space_to_str[smi->io.addr_type],
2863 smi->io.addr_data,
2864 smi->io.regspacing,
2865 smi->io.regsize,
2866 smi->io.regshift,
2867 smi->irq,
2868 smi->slave_addr);
2869}
2870
2871
2872
2873
2874
2875
2876
2877
2878static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2879{
2880 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2881 RECEIVE_MSG_AVAIL);
2882 return 1;
2883}
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2911#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2912#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2913#define DELL_IANA_MFR_ID 0x0002a2
2914static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2915{
2916 struct ipmi_device_id *id = &smi_info->device_id;
2917 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
2918 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2919 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2920 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2921 smi_info->oem_data_avail_handler =
2922 oem_data_avail_to_receive_msg_avail;
2923 } else if (ipmi_version_major(id) < 1 ||
2924 (ipmi_version_major(id) == 1 &&
2925 ipmi_version_minor(id) < 5)) {
2926 smi_info->oem_data_avail_handler =
2927 oem_data_avail_to_receive_msg_avail;
2928 }
2929 }
2930}
2931
2932#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2933static void return_hosed_msg_badsize(struct smi_info *smi_info)
2934{
2935 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2936
2937
2938 msg->rsp[0] = msg->data[0] | 4;
2939 msg->rsp[1] = msg->data[1];
2940 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2941 msg->rsp_size = 3;
2942 smi_info->curr_msg = NULL;
2943 deliver_recv_msg(smi_info, msg);
2944}
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957#define STORAGE_NETFN 0x0A
2958#define STORAGE_CMD_GET_SDR 0x23
2959static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2960 unsigned long unused,
2961 void *in)
2962{
2963 struct smi_info *smi_info = in;
2964 unsigned char *data = smi_info->curr_msg->data;
2965 unsigned int size = smi_info->curr_msg->data_size;
2966 if (size >= 8 &&
2967 (data[0]>>2) == STORAGE_NETFN &&
2968 data[1] == STORAGE_CMD_GET_SDR &&
2969 data[7] == 0x3A) {
2970 return_hosed_msg_badsize(smi_info);
2971 return NOTIFY_STOP;
2972 }
2973 return NOTIFY_DONE;
2974}
2975
2976static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2977 .notifier_call = dell_poweredge_bt_xaction_handler,
2978};
2979
2980
2981
2982
2983
2984
2985
2986
2987static void
2988setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2989{
2990 struct ipmi_device_id *id = &smi_info->device_id;
2991 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
2992 smi_info->si_type == SI_BT)
2993 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2994}
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004static void setup_oem_data_handler(struct smi_info *smi_info)
3005{
3006 setup_dell_poweredge_oem_data_handler(smi_info);
3007}
3008
3009static void setup_xaction_handlers(struct smi_info *smi_info)
3010{
3011 setup_dell_poweredge_bt_xaction_handler(smi_info);
3012}
3013
3014static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3015{
3016 if (smi_info->intf) {
3017
3018
3019
3020
3021 if (smi_info->thread != NULL)
3022 kthread_stop(smi_info->thread);
3023 del_timer_sync(&smi_info->si_timer);
3024 }
3025}
3026
3027static __devinitdata struct ipmi_default_vals
3028{
3029 int type;
3030 int port;
3031} ipmi_defaults[] =
3032{
3033 { .type = SI_KCS, .port = 0xca2 },
3034 { .type = SI_SMIC, .port = 0xca9 },
3035 { .type = SI_BT, .port = 0xe4 },
3036 { .port = 0 }
3037};
3038
3039static void __devinit default_find_bmc(void)
3040{
3041 struct smi_info *info;
3042 int i;
3043
3044 for (i = 0; ; i++) {
3045 if (!ipmi_defaults[i].port)
3046 break;
3047#ifdef CONFIG_PPC
3048 if (check_legacy_ioport(ipmi_defaults[i].port))
3049 continue;
3050#endif
3051 info = smi_info_alloc();
3052 if (!info)
3053 return;
3054
3055 info->addr_source = SI_DEFAULT;
3056
3057 info->si_type = ipmi_defaults[i].type;
3058 info->io_setup = port_setup;
3059 info->io.addr_data = ipmi_defaults[i].port;
3060 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3061
3062 info->io.addr = NULL;
3063 info->io.regspacing = DEFAULT_REGSPACING;
3064 info->io.regsize = DEFAULT_REGSPACING;
3065 info->io.regshift = 0;
3066
3067 if (add_smi(info) == 0) {
3068 if ((try_smi_init(info)) == 0) {
3069
3070 printk(KERN_INFO PFX "Found default %s"
3071 " state machine at %s address 0x%lx\n",
3072 si_to_str[info->si_type],
3073 addr_space_to_str[info->io.addr_type],
3074 info->io.addr_data);
3075 } else
3076 cleanup_one_si(info);
3077 } else {
3078 kfree(info);
3079 }
3080 }
3081}
3082
3083static int is_new_interface(struct smi_info *info)
3084{
3085 struct smi_info *e;
3086
3087 list_for_each_entry(e, &smi_infos, link) {
3088 if (e->io.addr_type != info->io.addr_type)
3089 continue;
3090 if (e->io.addr_data == info->io.addr_data)
3091 return 0;
3092 }
3093
3094 return 1;
3095}
3096
3097static int add_smi(struct smi_info *new_smi)
3098{
3099 int rv = 0;
3100
3101 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3102 ipmi_addr_src_to_str[new_smi->addr_source],
3103 si_to_str[new_smi->si_type]);
3104 mutex_lock(&smi_infos_lock);
3105 if (!is_new_interface(new_smi)) {
3106 printk(KERN_CONT " duplicate interface\n");
3107 rv = -EBUSY;
3108 goto out_err;
3109 }
3110
3111 printk(KERN_CONT "\n");
3112
3113
3114 new_smi->intf = NULL;
3115 new_smi->si_sm = NULL;
3116 new_smi->handlers = NULL;
3117
3118 list_add_tail(&new_smi->link, &smi_infos);
3119
3120out_err:
3121 mutex_unlock(&smi_infos_lock);
3122 return rv;
3123}
3124
3125static int try_smi_init(struct smi_info *new_smi)
3126{
3127 int rv = 0;
3128 int i;
3129
3130 printk(KERN_INFO PFX "Trying %s-specified %s state"
3131 " machine at %s address 0x%lx, slave address 0x%x,"
3132 " irq %d\n",
3133 ipmi_addr_src_to_str[new_smi->addr_source],
3134 si_to_str[new_smi->si_type],
3135 addr_space_to_str[new_smi->io.addr_type],
3136 new_smi->io.addr_data,
3137 new_smi->slave_addr, new_smi->irq);
3138
3139 switch (new_smi->si_type) {
3140 case SI_KCS:
3141 new_smi->handlers = &kcs_smi_handlers;
3142 break;
3143
3144 case SI_SMIC:
3145 new_smi->handlers = &smic_smi_handlers;
3146 break;
3147
3148 case SI_BT:
3149 new_smi->handlers = &bt_smi_handlers;
3150 break;
3151
3152 default:
3153
3154 rv = -EIO;
3155 goto out_err;
3156 }
3157
3158
3159 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3160 if (!new_smi->si_sm) {
3161 printk(KERN_ERR PFX
3162 "Could not allocate state machine memory\n");
3163 rv = -ENOMEM;
3164 goto out_err;
3165 }
3166 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3167 &new_smi->io);
3168
3169
3170 rv = new_smi->io_setup(new_smi);
3171 if (rv) {
3172 printk(KERN_ERR PFX "Could not set up I/O space\n");
3173 goto out_err;
3174 }
3175
3176
3177 if (new_smi->handlers->detect(new_smi->si_sm)) {
3178 if (new_smi->addr_source)
3179 printk(KERN_INFO PFX "Interface detection failed\n");
3180 rv = -ENODEV;
3181 goto out_err;
3182 }
3183
3184
3185
3186
3187
3188 rv = try_get_dev_id(new_smi);
3189 if (rv) {
3190 if (new_smi->addr_source)
3191 printk(KERN_INFO PFX "There appears to be no BMC"
3192 " at this location\n");
3193 goto out_err;
3194 }
3195
3196 setup_oem_data_handler(new_smi);
3197 setup_xaction_handlers(new_smi);
3198
3199 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3200 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3201 new_smi->curr_msg = NULL;
3202 atomic_set(&new_smi->req_events, 0);
3203 new_smi->run_to_completion = 0;
3204 for (i = 0; i < SI_NUM_STATS; i++)
3205 atomic_set(&new_smi->stats[i], 0);
3206
3207 new_smi->interrupt_disabled = 1;
3208 atomic_set(&new_smi->stop_operation, 0);
3209 new_smi->intf_num = smi_num;
3210 smi_num++;
3211
3212 rv = try_enable_event_buffer(new_smi);
3213 if (rv == 0)
3214 new_smi->has_event_buffer = 1;
3215
3216
3217
3218
3219
3220 start_clear_flags(new_smi);
3221
3222 if (new_smi->irq)
3223 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3224
3225 if (!new_smi->dev) {
3226
3227
3228
3229
3230 new_smi->pdev = platform_device_alloc("ipmi_si",
3231 new_smi->intf_num);
3232 if (!new_smi->pdev) {
3233 printk(KERN_ERR PFX
3234 "Unable to allocate platform device\n");
3235 goto out_err;
3236 }
3237 new_smi->dev = &new_smi->pdev->dev;
3238 new_smi->dev->driver = &ipmi_driver.driver;
3239
3240 rv = platform_device_add(new_smi->pdev);
3241 if (rv) {
3242 printk(KERN_ERR PFX
3243 "Unable to register system interface device:"
3244 " %d\n",
3245 rv);
3246 goto out_err;
3247 }
3248 new_smi->dev_registered = 1;
3249 }
3250
3251 rv = ipmi_register_smi(&handlers,
3252 new_smi,
3253 &new_smi->device_id,
3254 new_smi->dev,
3255 "bmc",
3256 new_smi->slave_addr);
3257 if (rv) {
3258 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3259 rv);
3260 goto out_err_stop_timer;
3261 }
3262
3263 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3264 type_file_read_proc,
3265 new_smi);
3266 if (rv) {
3267 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3268 goto out_err_stop_timer;
3269 }
3270
3271 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3272 stat_file_read_proc,
3273 new_smi);
3274 if (rv) {
3275 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3276 goto out_err_stop_timer;
3277 }
3278
3279 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3280 param_read_proc,
3281 new_smi);
3282 if (rv) {
3283 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3284 goto out_err_stop_timer;
3285 }
3286
3287 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3288 si_to_str[new_smi->si_type]);
3289
3290 return 0;
3291
3292 out_err_stop_timer:
3293 atomic_inc(&new_smi->stop_operation);
3294 wait_for_timer_and_thread(new_smi);
3295
3296 out_err:
3297 new_smi->interrupt_disabled = 1;
3298
3299 if (new_smi->intf) {
3300 ipmi_unregister_smi(new_smi->intf);
3301 new_smi->intf = NULL;
3302 }
3303
3304 if (new_smi->irq_cleanup) {
3305 new_smi->irq_cleanup(new_smi);
3306 new_smi->irq_cleanup = NULL;
3307 }
3308
3309
3310
3311
3312
3313
3314 synchronize_sched();
3315
3316 if (new_smi->si_sm) {
3317 if (new_smi->handlers)
3318 new_smi->handlers->cleanup(new_smi->si_sm);
3319 kfree(new_smi->si_sm);
3320 new_smi->si_sm = NULL;
3321 }
3322 if (new_smi->addr_source_cleanup) {
3323 new_smi->addr_source_cleanup(new_smi);
3324 new_smi->addr_source_cleanup = NULL;
3325 }
3326 if (new_smi->io_cleanup) {
3327 new_smi->io_cleanup(new_smi);
3328 new_smi->io_cleanup = NULL;
3329 }
3330
3331 if (new_smi->dev_registered) {
3332 platform_device_unregister(new_smi->pdev);
3333 new_smi->dev_registered = 0;
3334 }
3335
3336 return rv;
3337}
3338
3339static int __devinit init_ipmi_si(void)
3340{
3341 int i;
3342 char *str;
3343 int rv;
3344 struct smi_info *e;
3345 enum ipmi_addr_src type = SI_INVALID;
3346
3347 if (initialized)
3348 return 0;
3349 initialized = 1;
3350
3351
3352 rv = driver_register(&ipmi_driver.driver);
3353 if (rv) {
3354 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
3355 return rv;
3356 }
3357
3358
3359
3360 str = si_type_str;
3361 if (*str != '\0') {
3362 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3363 si_type[i] = str;
3364 str = strchr(str, ',');
3365 if (str) {
3366 *str = '\0';
3367 str++;
3368 } else {
3369 break;
3370 }
3371 }
3372 }
3373
3374 printk(KERN_INFO "IPMI System Interface driver.\n");
3375
3376 hardcode_find_bmc();
3377
3378
3379 mutex_lock(&smi_infos_lock);
3380 if (!list_empty(&smi_infos)) {
3381 mutex_unlock(&smi_infos_lock);
3382 return 0;
3383 }
3384 mutex_unlock(&smi_infos_lock);
3385
3386#ifdef CONFIG_PCI
3387 rv = pci_register_driver(&ipmi_pci_driver);
3388 if (rv)
3389 printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv);
3390 else
3391 pci_registered = 1;
3392#endif
3393
3394#ifdef CONFIG_ACPI
3395 pnp_register_driver(&ipmi_pnp_driver);
3396 pnp_registered = 1;
3397#endif
3398
3399#ifdef CONFIG_DMI
3400 dmi_find_bmc();
3401#endif
3402
3403#ifdef CONFIG_ACPI
3404 spmi_find_bmc();
3405#endif
3406
3407#ifdef CONFIG_PPC_OF
3408 of_register_platform_driver(&ipmi_of_platform_driver);
3409 of_registered = 1;
3410#endif
3411
3412
3413
3414
3415
3416
3417 mutex_lock(&smi_infos_lock);
3418 list_for_each_entry(e, &smi_infos, link) {
3419
3420
3421
3422 if (e->irq && (!type || e->addr_source == type)) {
3423 if (!try_smi_init(e)) {
3424 type = e->addr_source;
3425 }
3426 }
3427 }
3428
3429
3430 if (type) {
3431 mutex_unlock(&smi_infos_lock);
3432 return 0;
3433 }
3434
3435
3436
3437 list_for_each_entry(e, &smi_infos, link) {
3438 if (!e->irq && (!type || e->addr_source == type)) {
3439 if (!try_smi_init(e)) {
3440 type = e->addr_source;
3441 }
3442 }
3443 }
3444 mutex_unlock(&smi_infos_lock);
3445
3446 if (type)
3447 return 0;
3448
3449 if (si_trydefaults) {
3450 mutex_lock(&smi_infos_lock);
3451 if (list_empty(&smi_infos)) {
3452
3453 mutex_unlock(&smi_infos_lock);
3454 default_find_bmc();
3455 } else
3456 mutex_unlock(&smi_infos_lock);
3457 }
3458
3459 mutex_lock(&smi_infos_lock);
3460 if (unload_when_empty && list_empty(&smi_infos)) {
3461 mutex_unlock(&smi_infos_lock);
3462 cleanup_ipmi_si();
3463 printk(KERN_WARNING PFX
3464 "Unable to find any System Interface(s)\n");
3465 return -ENODEV;
3466 } else {
3467 mutex_unlock(&smi_infos_lock);
3468 return 0;
3469 }
3470}
3471module_init(init_ipmi_si);
3472
3473static void cleanup_one_si(struct smi_info *to_clean)
3474{
3475 int rv = 0;
3476 unsigned long flags;
3477
3478 if (!to_clean)
3479 return;
3480
3481 list_del(&to_clean->link);
3482
3483
3484 atomic_inc(&to_clean->stop_operation);
3485
3486
3487
3488
3489
3490 wait_for_timer_and_thread(to_clean);
3491
3492
3493
3494
3495
3496
3497 spin_lock_irqsave(&to_clean->si_lock, flags);
3498 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3499 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3500 poll(to_clean);
3501 schedule_timeout_uninterruptible(1);
3502 spin_lock_irqsave(&to_clean->si_lock, flags);
3503 }
3504 disable_si_irq(to_clean);
3505 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3506 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3507 poll(to_clean);
3508 schedule_timeout_uninterruptible(1);
3509 }
3510
3511
3512 if (to_clean->irq_cleanup)
3513 to_clean->irq_cleanup(to_clean);
3514 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3515 poll(to_clean);
3516 schedule_timeout_uninterruptible(1);
3517 }
3518
3519 if (to_clean->intf)
3520 rv = ipmi_unregister_smi(to_clean->intf);
3521
3522 if (rv) {
3523 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3524 rv);
3525 }
3526
3527 if (to_clean->handlers)
3528 to_clean->handlers->cleanup(to_clean->si_sm);
3529
3530 kfree(to_clean->si_sm);
3531
3532 if (to_clean->addr_source_cleanup)
3533 to_clean->addr_source_cleanup(to_clean);
3534 if (to_clean->io_cleanup)
3535 to_clean->io_cleanup(to_clean);
3536
3537 if (to_clean->dev_registered)
3538 platform_device_unregister(to_clean->pdev);
3539
3540 kfree(to_clean);
3541}
3542
3543static void __exit cleanup_ipmi_si(void)
3544{
3545 struct smi_info *e, *tmp_e;
3546
3547 if (!initialized)
3548 return;
3549
3550#ifdef CONFIG_PCI
3551 if (pci_registered)
3552 pci_unregister_driver(&ipmi_pci_driver);
3553#endif
3554#ifdef CONFIG_ACPI
3555 if (pnp_registered)
3556 pnp_unregister_driver(&ipmi_pnp_driver);
3557#endif
3558
3559#ifdef CONFIG_PPC_OF
3560 if (of_registered)
3561 of_unregister_platform_driver(&ipmi_of_platform_driver);
3562#endif
3563
3564 mutex_lock(&smi_infos_lock);
3565 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3566 cleanup_one_si(e);
3567 mutex_unlock(&smi_infos_lock);
3568
3569 driver_unregister(&ipmi_driver.driver);
3570}
3571module_exit(cleanup_ipmi_si);
3572
3573MODULE_LICENSE("GPL");
3574MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3575MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3576 " system interfaces.");
3577