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[PATCH] drivers/cdrom: fix-up schedule_timeout() usage
[deliverable/linux.git] / drivers / char / ipmi / ipmi_si_intf.c
CommitLineData
1da177e4
LT		 1/*
2 * ipmi_si.c
3 *
4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
5 * BT).
6 *
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
9 * source@mvista.com
10 *
11 * Copyright 2002 MontaVista Software Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 *
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
27 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
28 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * You should have received a copy of the GNU General Public License along
31 * with this program; if not, write to the Free Software Foundation, Inc.,
32 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 */
34
35/*
36 * This file holds the "policy" for the interface to the SMI state
37 * machine. It does the configuration, handles timers and interrupts,
38 * and drives the real SMI state machine.
39 */
40
41#include <linux/config.h>
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 <asm/irq.h>
55#ifdef CONFIG_HIGH_RES_TIMERS
56#include <linux/hrtime.h>
57# if defined(schedule_next_int)
58/* Old high-res timer code, do translations. */
59# define get_arch_cycles(a) quick_update_jiffies_sub(a)
60# define arch_cycles_per_jiffy cycles_per_jiffies
61# endif
62static inline void add_usec_to_timer(struct timer_list *t, long v)
63{
75b0768a
CM		 64 t->arch_cycle_expires += nsec_to_arch_cycle(v * 1000);
65 while (t->arch_cycle_expires >= arch_cycles_per_jiffy)
1da177e4
LT		 66 {
67 t->expires++;
75b0768a 68 t->arch_cycle_expires -= arch_cycles_per_jiffy;
1da177e4
LT		 69 }
70}
71#endif
72#include <linux/interrupt.h>
73#include <linux/rcupdate.h>
74#include <linux/ipmi_smi.h>
75#include <asm/io.h>
76#include "ipmi_si_sm.h"
77#include <linux/init.h>
b224cd3a 78#include <linux/dmi.h>
1da177e4
LT		 79
80/* Measure times between events in the driver. */
81#undef DEBUG_TIMING
82
83/* Call every 10 ms. */
84#define SI_TIMEOUT_TIME_USEC 10000
85#define SI_USEC_PER_JIFFY (1000000/HZ)
86#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
87#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
88 short timeout */
89
90enum si_intf_state {
91 SI_NORMAL,
92 SI_GETTING_FLAGS,
93 SI_GETTING_EVENTS,
94 SI_CLEARING_FLAGS,
95 SI_CLEARING_FLAGS_THEN_SET_IRQ,
96 SI_GETTING_MESSAGES,
97 SI_ENABLE_INTERRUPTS1,
98 SI_ENABLE_INTERRUPTS2
99 /* FIXME - add watchdog stuff. */
100};
101
9dbf68f9
CM		 102/* Some BT-specific defines we need here. */
103#define IPMI_BT_INTMASK_REG 2
104#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
105#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106
1da177e4
LT		 107enum si_type {
108 SI_KCS, SI_SMIC, SI_BT
109};
110
3ae0e0f9
CM		 111struct ipmi_device_id {
112 unsigned char device_id;
113 unsigned char device_revision;
114 unsigned char firmware_revision_1;
115 unsigned char firmware_revision_2;
116 unsigned char ipmi_version;
117 unsigned char additional_device_support;
118 unsigned char manufacturer_id[3];
119 unsigned char product_id[2];
120 unsigned char aux_firmware_revision[4];
121} __attribute__((packed));
122
123#define ipmi_version_major(v) ((v)->ipmi_version & 0xf)
124#define ipmi_version_minor(v) ((v)->ipmi_version >> 4)
125
1da177e4
LT		 126struct smi_info
127{
128 ipmi_smi_t intf;
129 struct si_sm_data *si_sm;
130 struct si_sm_handlers *handlers;
131 enum si_type si_type;
132 spinlock_t si_lock;
133 spinlock_t msg_lock;
134 struct list_head xmit_msgs;
135 struct list_head hp_xmit_msgs;
136 struct ipmi_smi_msg *curr_msg;
137 enum si_intf_state si_state;
138
139 /* Used to handle the various types of I/O that can occur with
140 IPMI */
141 struct si_sm_io io;
142 int (*io_setup)(struct smi_info *info);
143 void (*io_cleanup)(struct smi_info *info);
144 int (*irq_setup)(struct smi_info *info);
145 void (*irq_cleanup)(struct smi_info *info);
146 unsigned int io_size;
147
3ae0e0f9
CM		 148 /* Per-OEM handler, called from handle_flags().
149 Returns 1 when handle_flags() needs to be re-run
150 or 0 indicating it set si_state itself.
151 */
152 int (*oem_data_avail_handler)(struct smi_info *smi_info);
153
1da177e4
LT		 154 /* Flags from the last GET_MSG_FLAGS command, used when an ATTN
155 is set to hold the flags until we are done handling everything
156 from the flags. */
157#define RECEIVE_MSG_AVAIL 0x01
158#define EVENT_MSG_BUFFER_FULL 0x02
159#define WDT_PRE_TIMEOUT_INT 0x08
3ae0e0f9
CM		 160#define OEM0_DATA_AVAIL 0x20
161#define OEM1_DATA_AVAIL 0x40
162#define OEM2_DATA_AVAIL 0x80
163#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
164 OEM1_DATA_AVAIL | \
165 OEM2_DATA_AVAIL)
1da177e4
LT		 166 unsigned char msg_flags;
167
168 /* If set to true, this will request events the next time the
169 state machine is idle. */
170 atomic_t req_events;
171
172 /* If true, run the state machine to completion on every send
173 call. Generally used after a panic to make sure stuff goes
174 out. */
175 int run_to_completion;
176
177 /* The I/O port of an SI interface. */
178 int port;
179
180 /* The space between start addresses of the two ports. For
181 instance, if the first port is 0xca2 and the spacing is 4, then
182 the second port is 0xca6. */
183 unsigned int spacing;
184
185 /* zero if no irq; */
186 int irq;
187
188 /* The timer for this si. */
189 struct timer_list si_timer;
190
191 /* The time (in jiffies) the last timeout occurred at. */
192 unsigned long last_timeout_jiffies;
193
194 /* Used to gracefully stop the timer without race conditions. */
195 volatile int stop_operation;
196 volatile int timer_stopped;
197
198 /* The driver will disable interrupts when it gets into a
199 situation where it cannot handle messages due to lack of
200 memory. Once that situation clears up, it will re-enable
201 interrupts. */
202 int interrupt_disabled;
203
3ae0e0f9 204 struct ipmi_device_id device_id;
1da177e4
LT		 205
206 /* Slave address, could be reported from DMI. */
207 unsigned char slave_addr;
208
209 /* Counters and things for the proc filesystem. */
210 spinlock_t count_lock;
211 unsigned long short_timeouts;
212 unsigned long long_timeouts;
213 unsigned long timeout_restarts;
214 unsigned long idles;
215 unsigned long interrupts;
216 unsigned long attentions;
217 unsigned long flag_fetches;
218 unsigned long hosed_count;
219 unsigned long complete_transactions;
220 unsigned long events;
221 unsigned long watchdog_pretimeouts;
222 unsigned long incoming_messages;
223};
224
225static void si_restart_short_timer(struct smi_info *smi_info);
226
227static void deliver_recv_msg(struct smi_info *smi_info,
228 struct ipmi_smi_msg *msg)
229{
230 /* Deliver the message to the upper layer with the lock
231 released. */
232 spin_unlock(&(smi_info->si_lock));
233 ipmi_smi_msg_received(smi_info->intf, msg);
234 spin_lock(&(smi_info->si_lock));
235}
236
237static void return_hosed_msg(struct smi_info *smi_info)
238{
239 struct ipmi_smi_msg *msg = smi_info->curr_msg;
240
241 /* Make it a reponse */
242 msg->rsp[0] = msg->data[0] | 4;
243 msg->rsp[1] = msg->data[1];
244 msg->rsp[2] = 0xFF; /* Unknown error. */
245 msg->rsp_size = 3;
246
247 smi_info->curr_msg = NULL;
248 deliver_recv_msg(smi_info, msg);
249}
250
251static enum si_sm_result start_next_msg(struct smi_info *smi_info)
252{
253 int rv;
254 struct list_head *entry = NULL;
255#ifdef DEBUG_TIMING
256 struct timeval t;
257#endif
258
259 /* No need to save flags, we aleady have interrupts off and we
260 already hold the SMI lock. */
261 spin_lock(&(smi_info->msg_lock));
262
263 /* Pick the high priority queue first. */
264 if (! list_empty(&(smi_info->hp_xmit_msgs))) {
265 entry = smi_info->hp_xmit_msgs.next;
266 } else if (! list_empty(&(smi_info->xmit_msgs))) {
267 entry = smi_info->xmit_msgs.next;
268 }
269
e8b33617 270 if (! entry) {
1da177e4
LT		 271 smi_info->curr_msg = NULL;
272 rv = SI_SM_IDLE;
273 } else {
274 int err;
275
276 list_del(entry);
277 smi_info->curr_msg = list_entry(entry,
278 struct ipmi_smi_msg,
279 link);
280#ifdef DEBUG_TIMING
281 do_gettimeofday(&t);
282 printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
283#endif
284 err = smi_info->handlers->start_transaction(
285 smi_info->si_sm,
286 smi_info->curr_msg->data,
287 smi_info->curr_msg->data_size);
288 if (err) {
289 return_hosed_msg(smi_info);
290 }
291
292 rv = SI_SM_CALL_WITHOUT_DELAY;
293 }
294 spin_unlock(&(smi_info->msg_lock));
295
296 return rv;
297}
298
299static void start_enable_irq(struct smi_info *smi_info)
300{
301 unsigned char msg[2];
302
303 /* If we are enabling interrupts, we have to tell the
304 BMC to use them. */
305 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
306 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
307
308 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
309 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
310}
311
312static void start_clear_flags(struct smi_info *smi_info)
313{
314 unsigned char msg[3];
315
316 /* Make sure the watchdog pre-timeout flag is not set at startup. */
317 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
318 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
319 msg[2] = WDT_PRE_TIMEOUT_INT;
320
321 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
322 smi_info->si_state = SI_CLEARING_FLAGS;
323}
324
325/* When we have a situtaion where we run out of memory and cannot
326 allocate messages, we just leave them in the BMC and run the system
327 polled until we can allocate some memory. Once we have some
328 memory, we will re-enable the interrupt. */
329static inline void disable_si_irq(struct smi_info *smi_info)
330{
e8b33617 331 if ((smi_info->irq) && (! smi_info->interrupt_disabled)) {
1da177e4
LT		 332 disable_irq_nosync(smi_info->irq);
333 smi_info->interrupt_disabled = 1;
334 }
335}
336
337static inline void enable_si_irq(struct smi_info *smi_info)
338{
339 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
340 enable_irq(smi_info->irq);
341 smi_info->interrupt_disabled = 0;
342 }
343}
344
345static void handle_flags(struct smi_info *smi_info)
346{
3ae0e0f9 347 retry:
1da177e4
LT		 348 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
349 /* Watchdog pre-timeout */
350 spin_lock(&smi_info->count_lock);
351 smi_info->watchdog_pretimeouts++;
352 spin_unlock(&smi_info->count_lock);
353
354 start_clear_flags(smi_info);
355 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
356 spin_unlock(&(smi_info->si_lock));
357 ipmi_smi_watchdog_pretimeout(smi_info->intf);
358 spin_lock(&(smi_info->si_lock));
359 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
360 /* Messages available. */
361 smi_info->curr_msg = ipmi_alloc_smi_msg();
e8b33617 362 if (! smi_info->curr_msg) {
1da177e4
LT		 363 disable_si_irq(smi_info);
364 smi_info->si_state = SI_NORMAL;
365 return;
366 }
367 enable_si_irq(smi_info);
368
369 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
370 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
371 smi_info->curr_msg->data_size = 2;
372
373 smi_info->handlers->start_transaction(
374 smi_info->si_sm,
375 smi_info->curr_msg->data,
376 smi_info->curr_msg->data_size);
377 smi_info->si_state = SI_GETTING_MESSAGES;
378 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
379 /* Events available. */
380 smi_info->curr_msg = ipmi_alloc_smi_msg();
e8b33617 381 if (! smi_info->curr_msg) {
1da177e4
LT		 382 disable_si_irq(smi_info);
383 smi_info->si_state = SI_NORMAL;
384 return;
385 }
386 enable_si_irq(smi_info);
387
388 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
389 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
390 smi_info->curr_msg->data_size = 2;
391
392 smi_info->handlers->start_transaction(
393 smi_info->si_sm,
394 smi_info->curr_msg->data,
395 smi_info->curr_msg->data_size);
396 smi_info->si_state = SI_GETTING_EVENTS;
3ae0e0f9
CM		 397 } else if (smi_info->msg_flags & OEM_DATA_AVAIL) {
398 if (smi_info->oem_data_avail_handler)
399 if (smi_info->oem_data_avail_handler(smi_info))
400 goto retry;
1da177e4
LT		 401 } else {
402 smi_info->si_state = SI_NORMAL;
403 }
404}
405
406static void handle_transaction_done(struct smi_info *smi_info)
407{
408 struct ipmi_smi_msg *msg;
409#ifdef DEBUG_TIMING
410 struct timeval t;
411
412 do_gettimeofday(&t);
413 printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
414#endif
415 switch (smi_info->si_state) {
416 case SI_NORMAL:
e8b33617 417 if (! smi_info->curr_msg)
1da177e4
LT		 418 break;
419
420 smi_info->curr_msg->rsp_size
421 = smi_info->handlers->get_result(
422 smi_info->si_sm,
423 smi_info->curr_msg->rsp,
424 IPMI_MAX_MSG_LENGTH);
425
426 /* Do this here becase deliver_recv_msg() releases the
427 lock, and a new message can be put in during the
428 time the lock is released. */
429 msg = smi_info->curr_msg;
430 smi_info->curr_msg = NULL;
431 deliver_recv_msg(smi_info, msg);
432 break;
433
434 case SI_GETTING_FLAGS:
435 {
436 unsigned char msg[4];
437 unsigned int len;
438
439 /* We got the flags from the SMI, now handle them. */
440 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
441 if (msg[2] != 0) {
442 /* Error fetching flags, just give up for
443 now. */
444 smi_info->si_state = SI_NORMAL;
445 } else if (len < 4) {
446 /* Hmm, no flags. That's technically illegal, but
447 don't use uninitialized data. */
448 smi_info->si_state = SI_NORMAL;
449 } else {
450 smi_info->msg_flags = msg[3];
451 handle_flags(smi_info);
452 }
453 break;
454 }
455
456 case SI_CLEARING_FLAGS:
457 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
458 {
459 unsigned char msg[3];
460
461 /* We cleared the flags. */
462 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
463 if (msg[2] != 0) {
464 /* Error clearing flags */
465 printk(KERN_WARNING
466 "ipmi_si: Error clearing flags: %2.2x\n",
467 msg[2]);
468 }
469 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
470 start_enable_irq(smi_info);
471 else
472 smi_info->si_state = SI_NORMAL;
473 break;
474 }
475
476 case SI_GETTING_EVENTS:
477 {
478 smi_info->curr_msg->rsp_size
479 = smi_info->handlers->get_result(
480 smi_info->si_sm,
481 smi_info->curr_msg->rsp,
482 IPMI_MAX_MSG_LENGTH);
483
484 /* Do this here becase deliver_recv_msg() releases the
485 lock, and a new message can be put in during the
486 time the lock is released. */
487 msg = smi_info->curr_msg;
488 smi_info->curr_msg = NULL;
489 if (msg->rsp[2] != 0) {
490 /* Error getting event, probably done. */
491 msg->done(msg);
492
493 /* Take off the event flag. */
494 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
495 handle_flags(smi_info);
496 } else {
497 spin_lock(&smi_info->count_lock);
498 smi_info->events++;
499 spin_unlock(&smi_info->count_lock);
500
501 /* Do this before we deliver the message
502 because delivering the message releases the
503 lock and something else can mess with the
504 state. */
505 handle_flags(smi_info);
506
507 deliver_recv_msg(smi_info, msg);
508 }
509 break;
510 }
511
512 case SI_GETTING_MESSAGES:
513 {
514 smi_info->curr_msg->rsp_size
515 = smi_info->handlers->get_result(
516 smi_info->si_sm,
517 smi_info->curr_msg->rsp,
518 IPMI_MAX_MSG_LENGTH);
519
520 /* Do this here becase deliver_recv_msg() releases the
521 lock, and a new message can be put in during the
522 time the lock is released. */
523 msg = smi_info->curr_msg;
524 smi_info->curr_msg = NULL;
525 if (msg->rsp[2] != 0) {
526 /* Error getting event, probably done. */
527 msg->done(msg);
528
529 /* Take off the msg flag. */
530 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
531 handle_flags(smi_info);
532 } else {
533 spin_lock(&smi_info->count_lock);
534 smi_info->incoming_messages++;
535 spin_unlock(&smi_info->count_lock);
536
537 /* Do this before we deliver the message
538 because delivering the message releases the
539 lock and something else can mess with the
540 state. */
541 handle_flags(smi_info);
542
543 deliver_recv_msg(smi_info, msg);
544 }
545 break;
546 }
547
548 case SI_ENABLE_INTERRUPTS1:
549 {
550 unsigned char msg[4];
551
552 /* We got the flags from the SMI, now handle them. */
553 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
554 if (msg[2] != 0) {
555 printk(KERN_WARNING
556 "ipmi_si: Could not enable interrupts"
557 ", failed get, using polled mode.\n");
558 smi_info->si_state = SI_NORMAL;
559 } else {
560 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
561 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
562 msg[2] = msg[3] | 1; /* enable msg queue int */
563 smi_info->handlers->start_transaction(
564 smi_info->si_sm, msg, 3);
565 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
566 }
567 break;
568 }
569
570 case SI_ENABLE_INTERRUPTS2:
571 {
572 unsigned char msg[4];
573
574 /* We got the flags from the SMI, now handle them. */
575 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
576 if (msg[2] != 0) {
577 printk(KERN_WARNING
578 "ipmi_si: Could not enable interrupts"
579 ", failed set, using polled mode.\n");
580 }
581 smi_info->si_state = SI_NORMAL;
582 break;
583 }
584 }
585}
586
587/* Called on timeouts and events. Timeouts should pass the elapsed
588 time, interrupts should pass in zero. */
589static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
590 int time)
591{
592 enum si_sm_result si_sm_result;
593
594 restart:
595 /* There used to be a loop here that waited a little while
596 (around 25us) before giving up. That turned out to be
597 pointless, the minimum delays I was seeing were in the 300us
598 range, which is far too long to wait in an interrupt. So
599 we just run until the state machine tells us something
600 happened or it needs a delay. */
601 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
602 time = 0;
603 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
604 {
605 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
606 }
607
608 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE)
609 {
610 spin_lock(&smi_info->count_lock);
611 smi_info->complete_transactions++;
612 spin_unlock(&smi_info->count_lock);
613
614 handle_transaction_done(smi_info);
615 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
616 }
617 else if (si_sm_result == SI_SM_HOSED)
618 {
619 spin_lock(&smi_info->count_lock);
620 smi_info->hosed_count++;
621 spin_unlock(&smi_info->count_lock);
622
623 /* Do the before return_hosed_msg, because that
624 releases the lock. */
625 smi_info->si_state = SI_NORMAL;
626 if (smi_info->curr_msg != NULL) {
627 /* If we were handling a user message, format
628 a response to send to the upper layer to
629 tell it about the error. */
630 return_hosed_msg(smi_info);
631 }
632 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
633 }
634
635 /* We prefer handling attn over new messages. */
636 if (si_sm_result == SI_SM_ATTN)
637 {
638 unsigned char msg[2];
639
640 spin_lock(&smi_info->count_lock);
641 smi_info->attentions++;
642 spin_unlock(&smi_info->count_lock);
643
644 /* Got a attn, send down a get message flags to see
645 what's causing it. It would be better to handle
646 this in the upper layer, but due to the way
647 interrupts work with the SMI, that's not really
648 possible. */
649 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
650 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
651
652 smi_info->handlers->start_transaction(
653 smi_info->si_sm, msg, 2);
654 smi_info->si_state = SI_GETTING_FLAGS;
655 goto restart;
656 }
657
658 /* If we are currently idle, try to start the next message. */
659 if (si_sm_result == SI_SM_IDLE) {
660 spin_lock(&smi_info->count_lock);
661 smi_info->idles++;
662 spin_unlock(&smi_info->count_lock);
663
664 si_sm_result = start_next_msg(smi_info);
665 if (si_sm_result != SI_SM_IDLE)
666 goto restart;
667 }
668
669 if ((si_sm_result == SI_SM_IDLE)
670 && (atomic_read(&smi_info->req_events)))
671 {
672 /* We are idle and the upper layer requested that I fetch
673 events, so do so. */
674 unsigned char msg[2];
675
676 spin_lock(&smi_info->count_lock);
677 smi_info->flag_fetches++;
678 spin_unlock(&smi_info->count_lock);
679
680 atomic_set(&smi_info->req_events, 0);
681 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
682 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
683
684 smi_info->handlers->start_transaction(
685 smi_info->si_sm, msg, 2);
686 smi_info->si_state = SI_GETTING_FLAGS;
687 goto restart;
688 }
689
690 return si_sm_result;
691}
692
693static void sender(void *send_info,
694 struct ipmi_smi_msg *msg,
695 int priority)
696{
697 struct smi_info *smi_info = send_info;
698 enum si_sm_result result;
699 unsigned long flags;
700#ifdef DEBUG_TIMING
701 struct timeval t;
702#endif
703
704 spin_lock_irqsave(&(smi_info->msg_lock), flags);
705#ifdef DEBUG_TIMING
706 do_gettimeofday(&t);
707 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
708#endif
709
710 if (smi_info->run_to_completion) {
711 /* If we are running to completion, then throw it in
712 the list and run transactions until everything is
713 clear. Priority doesn't matter here. */
714 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
715
716 /* We have to release the msg lock and claim the smi
717 lock in this case, because of race conditions. */
718 spin_unlock_irqrestore(&(smi_info->msg_lock), flags);
719
720 spin_lock_irqsave(&(smi_info->si_lock), flags);
721 result = smi_event_handler(smi_info, 0);
722 while (result != SI_SM_IDLE) {
723 udelay(SI_SHORT_TIMEOUT_USEC);
724 result = smi_event_handler(smi_info,
725 SI_SHORT_TIMEOUT_USEC);
726 }
727 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
728 return;
729 } else {
730 if (priority > 0) {
731 list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs));
732 } else {
733 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
734 }
735 }
736 spin_unlock_irqrestore(&(smi_info->msg_lock), flags);
737
738 spin_lock_irqsave(&(smi_info->si_lock), flags);
739 if ((smi_info->si_state == SI_NORMAL)
740 && (smi_info->curr_msg == NULL))
741 {
742 start_next_msg(smi_info);
743 si_restart_short_timer(smi_info);
744 }
745 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
746}
747
748static void set_run_to_completion(void *send_info, int i_run_to_completion)
749{
750 struct smi_info *smi_info = send_info;
751 enum si_sm_result result;
752 unsigned long flags;
753
754 spin_lock_irqsave(&(smi_info->si_lock), flags);
755
756 smi_info->run_to_completion = i_run_to_completion;
757 if (i_run_to_completion) {
758 result = smi_event_handler(smi_info, 0);
759 while (result != SI_SM_IDLE) {
760 udelay(SI_SHORT_TIMEOUT_USEC);
761 result = smi_event_handler(smi_info,
762 SI_SHORT_TIMEOUT_USEC);
763 }
764 }
765
766 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
767}
768
769static void poll(void *send_info)
770{
771 struct smi_info *smi_info = send_info;
772
773 smi_event_handler(smi_info, 0);
774}
775
776static void request_events(void *send_info)
777{
778 struct smi_info *smi_info = send_info;
779
780 atomic_set(&smi_info->req_events, 1);
781}
782
783static int initialized = 0;
784
785/* Must be called with interrupts off and with the si_lock held. */
786static void si_restart_short_timer(struct smi_info *smi_info)
787{
788#if defined(CONFIG_HIGH_RES_TIMERS)
789 unsigned long flags;
790 unsigned long jiffies_now;
75b0768a 791 unsigned long seq;
1da177e4
LT		 792
793 if (del_timer(&(smi_info->si_timer))) {
794 /* If we don't delete the timer, then it will go off
795 immediately, anyway. So we only process if we
796 actually delete the timer. */
797
75b0768a
CM		 798 do {
799 seq = read_seqbegin_irqsave(&xtime_lock, flags);
800 jiffies_now = jiffies;
801 smi_info->si_timer.expires = jiffies_now;
802 smi_info->si_timer.arch_cycle_expires
803 = get_arch_cycles(jiffies_now);
804 } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
1da177e4
LT		 805
806 add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC);
807
808 add_timer(&(smi_info->si_timer));
809 spin_lock_irqsave(&smi_info->count_lock, flags);
810 smi_info->timeout_restarts++;
811 spin_unlock_irqrestore(&smi_info->count_lock, flags);
812 }
813#endif
814}
815
816static void smi_timeout(unsigned long data)
817{
818 struct smi_info *smi_info = (struct smi_info *) data;
819 enum si_sm_result smi_result;
820 unsigned long flags;
821 unsigned long jiffies_now;
822 unsigned long time_diff;
823#ifdef DEBUG_TIMING
824 struct timeval t;
825#endif
826
827 if (smi_info->stop_operation) {
828 smi_info->timer_stopped = 1;
829 return;
830 }
831
832 spin_lock_irqsave(&(smi_info->si_lock), flags);
833#ifdef DEBUG_TIMING
834 do_gettimeofday(&t);
835 printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
836#endif
837 jiffies_now = jiffies;
838 time_diff = ((jiffies_now - smi_info->last_timeout_jiffies)
839 * SI_USEC_PER_JIFFY);
840 smi_result = smi_event_handler(smi_info, time_diff);
841
842 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
843
844 smi_info->last_timeout_jiffies = jiffies_now;
845
846 if ((smi_info->irq) && (! smi_info->interrupt_disabled)) {
847 /* Running with interrupts, only do long timeouts. */
848 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
849 spin_lock_irqsave(&smi_info->count_lock, flags);
850 smi_info->long_timeouts++;
851 spin_unlock_irqrestore(&smi_info->count_lock, flags);
852 goto do_add_timer;
853 }
854
855 /* If the state machine asks for a short delay, then shorten
856 the timer timeout. */
857 if (smi_result == SI_SM_CALL_WITH_DELAY) {
75b0768a
CM		 858#if defined(CONFIG_HIGH_RES_TIMERS)
859 unsigned long seq;
860#endif
1da177e4
LT		 861 spin_lock_irqsave(&smi_info->count_lock, flags);
862 smi_info->short_timeouts++;
863 spin_unlock_irqrestore(&smi_info->count_lock, flags);
864#if defined(CONFIG_HIGH_RES_TIMERS)
75b0768a
CM		 865 do {
866 seq = read_seqbegin_irqsave(&xtime_lock, flags);
867 smi_info->si_timer.expires = jiffies;
868 smi_info->si_timer.arch_cycle_expires
869 = get_arch_cycles(smi_info->si_timer.expires);
870 } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
1da177e4
LT		 871 add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC);
872#else
873 smi_info->si_timer.expires = jiffies + 1;
874#endif
875 } else {
876 spin_lock_irqsave(&smi_info->count_lock, flags);
877 smi_info->long_timeouts++;
878 spin_unlock_irqrestore(&smi_info->count_lock, flags);
879 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
880#if defined(CONFIG_HIGH_RES_TIMERS)
75b0768a 881 smi_info->si_timer.arch_cycle_expires = 0;
1da177e4
LT		 882#endif
883 }
884
885 do_add_timer:
886 add_timer(&(smi_info->si_timer));
887}
888
889static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs)
890{
891 struct smi_info *smi_info = data;
892 unsigned long flags;
893#ifdef DEBUG_TIMING
894 struct timeval t;
895#endif
896
897 spin_lock_irqsave(&(smi_info->si_lock), flags);
898
899 spin_lock(&smi_info->count_lock);
900 smi_info->interrupts++;
901 spin_unlock(&smi_info->count_lock);
902
903 if (smi_info->stop_operation)
904 goto out;
905
906#ifdef DEBUG_TIMING
907 do_gettimeofday(&t);
908 printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
909#endif
910 smi_event_handler(smi_info, 0);
911 out:
912 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
913 return IRQ_HANDLED;
914}
915
9dbf68f9
CM		 916static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs)
917{
918 struct smi_info *smi_info = data;
919 /* We need to clear the IRQ flag for the BT interface. */
920 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
921 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
922 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
923 return si_irq_handler(irq, data, regs);
924}
925
926
1da177e4
LT		 927static struct ipmi_smi_handlers handlers =
928{
929 .owner = THIS_MODULE,
930 .sender = sender,
931 .request_events = request_events,
932 .set_run_to_completion = set_run_to_completion,
933 .poll = poll,
934};
935
936/* There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
937 a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */
938
939#define SI_MAX_PARMS 4
940#define SI_MAX_DRIVERS ((SI_MAX_PARMS * 2) + 2)
941static struct smi_info *smi_infos[SI_MAX_DRIVERS] =
942{ NULL, NULL, NULL, NULL };
943
944#define DEVICE_NAME "ipmi_si"
945
946#define DEFAULT_KCS_IO_PORT 0xca2
947#define DEFAULT_SMIC_IO_PORT 0xca9
948#define DEFAULT_BT_IO_PORT 0xe4
949#define DEFAULT_REGSPACING 1
950
951static int si_trydefaults = 1;
952static char *si_type[SI_MAX_PARMS];
953#define MAX_SI_TYPE_STR 30
954static char si_type_str[MAX_SI_TYPE_STR];
955static unsigned long addrs[SI_MAX_PARMS];
956static int num_addrs;
957static unsigned int ports[SI_MAX_PARMS];
958static int num_ports;
959static int irqs[SI_MAX_PARMS];
960static int num_irqs;
961static int regspacings[SI_MAX_PARMS];
962static int num_regspacings = 0;
963static int regsizes[SI_MAX_PARMS];
964static int num_regsizes = 0;
965static int regshifts[SI_MAX_PARMS];
966static int num_regshifts = 0;
967static int slave_addrs[SI_MAX_PARMS];
968static int num_slave_addrs = 0;
969
970
971module_param_named(trydefaults, si_trydefaults, bool, 0);
972MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
973 " default scan of the KCS and SMIC interface at the standard"
974 " address");
975module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
976MODULE_PARM_DESC(type, "Defines the type of each interface, each"
977 " interface separated by commas. The types are 'kcs',"
978 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
979 " the first interface to kcs and the second to bt");
980module_param_array(addrs, long, &num_addrs, 0);
981MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
982 " addresses separated by commas. Only use if an interface"
983 " is in memory. Otherwise, set it to zero or leave"
984 " it blank.");
985module_param_array(ports, int, &num_ports, 0);
986MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
987 " addresses separated by commas. Only use if an interface"
988 " is a port. Otherwise, set it to zero or leave"
989 " it blank.");
990module_param_array(irqs, int, &num_irqs, 0);
991MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
992 " addresses separated by commas. Only use if an interface"
993 " has an interrupt. Otherwise, set it to zero or leave"
994 " it blank.");
995module_param_array(regspacings, int, &num_regspacings, 0);
996MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
997 " and each successive register used by the interface. For"
998 " instance, if the start address is 0xca2 and the spacing"
999 " is 2, then the second address is at 0xca4. Defaults"
1000 " to 1.");
1001module_param_array(regsizes, int, &num_regsizes, 0);
1002MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1003 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1004 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1005 " the 8-bit IPMI register has to be read from a larger"
1006 " register.");
1007module_param_array(regshifts, int, &num_regshifts, 0);
1008MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1009 " IPMI register, in bits. For instance, if the data"
1010 " is read from a 32-bit word and the IPMI data is in"
1011 " bit 8-15, then the shift would be 8");
1012module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1013MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1014 " the controller. Normally this is 0x20, but can be"
1015 " overridden by this parm. This is an array indexed"
1016 " by interface number.");
1017
1018
1019#define IPMI_MEM_ADDR_SPACE 1
1020#define IPMI_IO_ADDR_SPACE 2
1021
8466361a 1022#if defined(CONFIG_ACPI) || defined(CONFIG_X86) || defined(CONFIG_PCI)
1da177e4
LT		 1023static int is_new_interface(int intf, u8 addr_space, unsigned long base_addr)
1024{
1025 int i;
1026
1027 for (i = 0; i < SI_MAX_PARMS; ++i) {
1028 /* Don't check our address. */
1029 if (i == intf)
1030 continue;
1031 if (si_type[i] != NULL) {
1032 if ((addr_space == IPMI_MEM_ADDR_SPACE &&
1033 base_addr == addrs[i]) ||
1034 (addr_space == IPMI_IO_ADDR_SPACE &&
1035 base_addr == ports[i]))
1036 return 0;
1037 }
1038 else
1039 break;
1040 }
1041
1042 return 1;
1043}
1044#endif
1045
1046static int std_irq_setup(struct smi_info *info)
1047{
1048 int rv;
1049
e8b33617 1050 if (! info->irq)
1da177e4
LT		 1051 return 0;
1052
9dbf68f9
CM		 1053 if (info->si_type == SI_BT) {
1054 rv = request_irq(info->irq,
1055 si_bt_irq_handler,
1056 SA_INTERRUPT,
1057 DEVICE_NAME,
1058 info);
e8b33617 1059 if (! rv)
9dbf68f9
CM		 1060 /* Enable the interrupt in the BT interface. */
1061 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1062 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1063 } else
1064 rv = request_irq(info->irq,
1065 si_irq_handler,
1066 SA_INTERRUPT,
1067 DEVICE_NAME,
1068 info);
1da177e4
LT		 1069 if (rv) {
1070 printk(KERN_WARNING
1071 "ipmi_si: %s unable to claim interrupt %d,"
1072 " running polled\n",
1073 DEVICE_NAME, info->irq);
1074 info->irq = 0;
1075 } else {
1076 printk(" Using irq %d\n", info->irq);
1077 }
1078
1079 return rv;
1080}
1081
1082static void std_irq_cleanup(struct smi_info *info)
1083{
e8b33617 1084 if (! info->irq)
1da177e4
LT		 1085 return;
1086
9dbf68f9
CM		 1087 if (info->si_type == SI_BT)
1088 /* Disable the interrupt in the BT interface. */
1089 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1da177e4
LT		 1090 free_irq(info->irq, info);
1091}
1092
1093static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1094{
1095 unsigned int *addr = io->info;
1096
1097 return inb((*addr)+(offset*io->regspacing));
1098}
1099
1100static void port_outb(struct si_sm_io *io, unsigned int offset,
1101 unsigned char b)
1102{
1103 unsigned int *addr = io->info;
1104
1105 outb(b, (*addr)+(offset * io->regspacing));
1106}
1107
1108static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1109{
1110 unsigned int *addr = io->info;
1111
1112 return (inw((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
1113}
1114
1115static void port_outw(struct si_sm_io *io, unsigned int offset,
1116 unsigned char b)
1117{
1118 unsigned int *addr = io->info;
1119
1120 outw(b << io->regshift, (*addr)+(offset * io->regspacing));
1121}
1122
1123static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1124{
1125 unsigned int *addr = io->info;
1126
1127 return (inl((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
1128}
1129
1130static void port_outl(struct si_sm_io *io, unsigned int offset,
1131 unsigned char b)
1132{
1133 unsigned int *addr = io->info;
1134
1135 outl(b << io->regshift, (*addr)+(offset * io->regspacing));
1136}
1137
1138static void port_cleanup(struct smi_info *info)
1139{
1140 unsigned int *addr = info->io.info;
1141 int mapsize;
1142
1143 if (addr && (*addr)) {
1144 mapsize = ((info->io_size * info->io.regspacing)
1145 - (info->io.regspacing - info->io.regsize));
1146
1147 release_region (*addr, mapsize);
1148 }
1149 kfree(info);
1150}
1151
1152static int port_setup(struct smi_info *info)
1153{
1154 unsigned int *addr = info->io.info;
1155 int mapsize;
1156
e8b33617 1157 if (! addr || (! *addr))
1da177e4
LT		 1158 return -ENODEV;
1159
1160 info->io_cleanup = port_cleanup;
1161
1162 /* Figure out the actual inb/inw/inl/etc routine to use based
1163 upon the register size. */
1164 switch (info->io.regsize) {
1165 case 1:
1166 info->io.inputb = port_inb;
1167 info->io.outputb = port_outb;
1168 break;
1169 case 2:
1170 info->io.inputb = port_inw;
1171 info->io.outputb = port_outw;
1172 break;
1173 case 4:
1174 info->io.inputb = port_inl;
1175 info->io.outputb = port_outl;
1176 break;
1177 default:
1178 printk("ipmi_si: Invalid register size: %d\n",
1179 info->io.regsize);
1180 return -EINVAL;
1181 }
1182
1183 /* Calculate the total amount of memory to claim. This is an
1184 * unusual looking calculation, but it avoids claiming any
1185 * more memory than it has to. It will claim everything
1186 * between the first address to the end of the last full
1187 * register. */
1188 mapsize = ((info->io_size * info->io.regspacing)
1189 - (info->io.regspacing - info->io.regsize));
1190
1191 if (request_region(*addr, mapsize, DEVICE_NAME) == NULL)
1192 return -EIO;
1193 return 0;
1194}
1195
1196static int try_init_port(int intf_num, struct smi_info **new_info)
1197{
1198 struct smi_info *info;
1199
e8b33617 1200 if (! ports[intf_num])
1da177e4
LT		 1201 return -ENODEV;
1202
e8b33617 1203 if (! is_new_interface(intf_num, IPMI_IO_ADDR_SPACE,
1da177e4
LT		 1204 ports[intf_num]))
1205 return -ENODEV;
1206
1207 info = kmalloc(sizeof(*info), GFP_KERNEL);
e8b33617 1208 if (! info) {
1da177e4
LT		 1209 printk(KERN_ERR "ipmi_si: Could not allocate SI data (1)\n");
1210 return -ENOMEM;
1211 }
1212 memset(info, 0, sizeof(*info));
1213
1214 info->io_setup = port_setup;
1215 info->io.info = &(ports[intf_num]);
1216 info->io.addr = NULL;
1217 info->io.regspacing = regspacings[intf_num];
e8b33617 1218 if (! info->io.regspacing)
1da177e4
LT		 1219 info->io.regspacing = DEFAULT_REGSPACING;
1220 info->io.regsize = regsizes[intf_num];
e8b33617 1221 if (! info->io.regsize)
1da177e4
LT		 1222 info->io.regsize = DEFAULT_REGSPACING;
1223 info->io.regshift = regshifts[intf_num];
1224 info->irq = 0;
1225 info->irq_setup = NULL;
1226 *new_info = info;
1227
1228 if (si_type[intf_num] == NULL)
1229 si_type[intf_num] = "kcs";
1230
1231 printk("ipmi_si: Trying \"%s\" at I/O port 0x%x\n",
1232 si_type[intf_num], ports[intf_num]);
1233 return 0;
1234}
1235
1236static unsigned char mem_inb(struct si_sm_io *io, unsigned int offset)
1237{
1238 return readb((io->addr)+(offset * io->regspacing));
1239}
1240
1241static void mem_outb(struct si_sm_io *io, unsigned int offset,
1242 unsigned char b)
1243{
1244 writeb(b, (io->addr)+(offset * io->regspacing));
1245}
1246
1247static unsigned char mem_inw(struct si_sm_io *io, unsigned int offset)
1248{
1249 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1250 && 0xff;
1251}
1252
1253static void mem_outw(struct si_sm_io *io, unsigned int offset,
1254 unsigned char b)
1255{
1256 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1257}
1258
1259static unsigned char mem_inl(struct si_sm_io *io, unsigned int offset)
1260{
1261 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1262 && 0xff;
1263}
1264
1265static void mem_outl(struct si_sm_io *io, unsigned int offset,
1266 unsigned char b)
1267{
1268 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1269}
1270
1271#ifdef readq
1272static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1273{
1274 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1275 && 0xff;
1276}
1277
1278static void mem_outq(struct si_sm_io *io, unsigned int offset,
1279 unsigned char b)
1280{
1281 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1282}
1283#endif
1284
1285static void mem_cleanup(struct smi_info *info)
1286{
1287 unsigned long *addr = info->io.info;
1288 int mapsize;
1289
1290 if (info->io.addr) {
1291 iounmap(info->io.addr);
1292
1293 mapsize = ((info->io_size * info->io.regspacing)
1294 - (info->io.regspacing - info->io.regsize));
1295
1296 release_mem_region(*addr, mapsize);
1297 }
1298 kfree(info);
1299}
1300
1301static int mem_setup(struct smi_info *info)
1302{
1303 unsigned long *addr = info->io.info;
1304 int mapsize;
1305
e8b33617 1306 if (! addr || (! *addr))
1da177e4
LT		 1307 return -ENODEV;
1308
1309 info->io_cleanup = mem_cleanup;
1310
1311 /* Figure out the actual readb/readw/readl/etc routine to use based
1312 upon the register size. */
1313 switch (info->io.regsize) {
1314 case 1:
1315 info->io.inputb = mem_inb;
1316 info->io.outputb = mem_outb;
1317 break;
1318 case 2:
1319 info->io.inputb = mem_inw;
1320 info->io.outputb = mem_outw;
1321 break;
1322 case 4:
1323 info->io.inputb = mem_inl;
1324 info->io.outputb = mem_outl;
1325 break;
1326#ifdef readq
1327 case 8:
1328 info->io.inputb = mem_inq;
1329 info->io.outputb = mem_outq;
1330 break;
1331#endif
1332 default:
1333 printk("ipmi_si: Invalid register size: %d\n",
1334 info->io.regsize);
1335 return -EINVAL;
1336 }
1337
1338 /* Calculate the total amount of memory to claim. This is an
1339 * unusual looking calculation, but it avoids claiming any
1340 * more memory than it has to. It will claim everything
1341 * between the first address to the end of the last full
1342 * register. */
1343 mapsize = ((info->io_size * info->io.regspacing)
1344 - (info->io.regspacing - info->io.regsize));
1345
1346 if (request_mem_region(*addr, mapsize, DEVICE_NAME) == NULL)
1347 return -EIO;
1348
1349 info->io.addr = ioremap(*addr, mapsize);
1350 if (info->io.addr == NULL) {
1351 release_mem_region(*addr, mapsize);
1352 return -EIO;
1353 }
1354 return 0;
1355}
1356
1357static int try_init_mem(int intf_num, struct smi_info **new_info)
1358{
1359 struct smi_info *info;
1360
e8b33617 1361 if (! addrs[intf_num])
1da177e4
LT		 1362 return -ENODEV;
1363
e8b33617 1364 if (! is_new_interface(intf_num, IPMI_MEM_ADDR_SPACE,
1da177e4
LT		 1365 addrs[intf_num]))
1366 return -ENODEV;
1367
1368 info = kmalloc(sizeof(*info), GFP_KERNEL);
e8b33617 1369 if (! info) {
1da177e4
LT		 1370 printk(KERN_ERR "ipmi_si: Could not allocate SI data (2)\n");
1371 return -ENOMEM;
1372 }
1373 memset(info, 0, sizeof(*info));
1374
1375 info->io_setup = mem_setup;
1376 info->io.info = &addrs[intf_num];
1377 info->io.addr = NULL;
1378 info->io.regspacing = regspacings[intf_num];
e8b33617 1379 if (! info->io.regspacing)
1da177e4
LT		 1380 info->io.regspacing = DEFAULT_REGSPACING;
1381 info->io.regsize = regsizes[intf_num];
e8b33617 1382 if (! info->io.regsize)
1da177e4
LT		 1383 info->io.regsize = DEFAULT_REGSPACING;
1384 info->io.regshift = regshifts[intf_num];
1385 info->irq = 0;
1386 info->irq_setup = NULL;
1387 *new_info = info;
1388
1389 if (si_type[intf_num] == NULL)
1390 si_type[intf_num] = "kcs";
1391
1392 printk("ipmi_si: Trying \"%s\" at memory address 0x%lx\n",
1393 si_type[intf_num], addrs[intf_num]);
1394 return 0;
1395}
1396
1397
8466361a 1398#ifdef CONFIG_ACPI
1da177e4
LT		 1399
1400#include <linux/acpi.h>
1401
1402/* Once we get an ACPI failure, we don't try any more, because we go
1403 through the tables sequentially. Once we don't find a table, there
1404 are no more. */
1405static int acpi_failure = 0;
1406
1407/* For GPE-type interrupts. */
1408static u32 ipmi_acpi_gpe(void *context)
1409{
1410 struct smi_info *smi_info = context;
1411 unsigned long flags;
1412#ifdef DEBUG_TIMING
1413 struct timeval t;
1414#endif
1415
1416 spin_lock_irqsave(&(smi_info->si_lock), flags);
1417
1418 spin_lock(&smi_info->count_lock);
1419 smi_info->interrupts++;
1420 spin_unlock(&smi_info->count_lock);
1421
1422 if (smi_info->stop_operation)
1423 goto out;
1424
1425#ifdef DEBUG_TIMING
1426 do_gettimeofday(&t);
1427 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1428#endif
1429 smi_event_handler(smi_info, 0);
1430 out:
1431 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1432
1433 return ACPI_INTERRUPT_HANDLED;
1434}
1435
1436static int acpi_gpe_irq_setup(struct smi_info *info)
1437{
1438 acpi_status status;
1439
e8b33617 1440 if (! info->irq)
1da177e4
LT		 1441 return 0;
1442
1443 /* FIXME - is level triggered right? */
1444 status = acpi_install_gpe_handler(NULL,
1445 info->irq,
1446 ACPI_GPE_LEVEL_TRIGGERED,
1447 &ipmi_acpi_gpe,
1448 info);
1449 if (status != AE_OK) {
1450 printk(KERN_WARNING
1451 "ipmi_si: %s unable to claim ACPI GPE %d,"
1452 " running polled\n",
1453 DEVICE_NAME, info->irq);
1454 info->irq = 0;
1455 return -EINVAL;
1456 } else {
1457 printk(" Using ACPI GPE %d\n", info->irq);
1458 return 0;
1459 }
1460}
1461
1462static void acpi_gpe_irq_cleanup(struct smi_info *info)
1463{
e8b33617 1464 if (! info->irq)
1da177e4
LT		 1465 return;
1466
1467 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1468}
1469
1470/*
1471 * Defined at
1472 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf
1473 */
1474struct SPMITable {
1475 s8 Signature[4];
1476 u32 Length;
1477 u8 Revision;
1478 u8 Checksum;
1479 s8 OEMID[6];
1480 s8 OEMTableID[8];
1481 s8 OEMRevision[4];
1482 s8 CreatorID[4];
1483 s8 CreatorRevision[4];
1484 u8 InterfaceType;
1485 u8 IPMIlegacy;
1486 s16 SpecificationRevision;
1487
1488 /*
1489 * Bit 0 - SCI interrupt supported
1490 * Bit 1 - I/O APIC/SAPIC
1491 */
1492 u8 InterruptType;
1493
1494 /* If bit 0 of InterruptType is set, then this is the SCI
1495 interrupt in the GPEx_STS register. */
1496 u8 GPE;
1497
1498 s16 Reserved;
1499
1500 /* If bit 1 of InterruptType is set, then this is the I/O
1501 APIC/SAPIC interrupt. */
1502 u32 GlobalSystemInterrupt;
1503
1504 /* The actual register address. */
1505 struct acpi_generic_address addr;
1506
1507 u8 UID[4];
1508
1509 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
1510};
1511
1512static int try_init_acpi(int intf_num, struct smi_info **new_info)
1513{
1514 struct smi_info *info;
1515 acpi_status status;
1516 struct SPMITable *spmi;
1517 char *io_type;
1518 u8 addr_space;
1519
4fbd1514
YD		 1520 if (acpi_disabled)
1521 return -ENODEV;
1522
1da177e4
LT		 1523 if (acpi_failure)
1524 return -ENODEV;
1525
1526 status = acpi_get_firmware_table("SPMI", intf_num+1,
1527 ACPI_LOGICAL_ADDRESSING,
1528 (struct acpi_table_header **) &spmi);
1529 if (status != AE_OK) {
1530 acpi_failure = 1;
1531 return -ENODEV;
1532 }
1533
1534 if (spmi->IPMIlegacy != 1) {
1535 printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
1536 return -ENODEV;
1537 }
1538
1539 if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
1540 addr_space = IPMI_MEM_ADDR_SPACE;
1541 else
1542 addr_space = IPMI_IO_ADDR_SPACE;
e8b33617 1543 if (! is_new_interface(-1, addr_space, spmi->addr.address))
1da177e4
LT		 1544 return -ENODEV;
1545
e8b33617 1546 if (! spmi->addr.register_bit_width) {
1da177e4
LT		 1547 acpi_failure = 1;
1548 return -ENODEV;
1549 }
1550
1551 /* Figure out the interface type. */
1552 switch (spmi->InterfaceType)
1553 {
1554 case 1: /* KCS */
1555 si_type[intf_num] = "kcs";
1556 break;
1557
1558 case 2: /* SMIC */
1559 si_type[intf_num] = "smic";
1560 break;
1561
1562 case 3: /* BT */
1563 si_type[intf_num] = "bt";
1564 break;
1565
1566 default:
1567 printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
1568 spmi->InterfaceType);
1569 return -EIO;
1570 }
1571
1572 info = kmalloc(sizeof(*info), GFP_KERNEL);
e8b33617 1573 if (! info) {
1da177e4
LT		 1574 printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
1575 return -ENOMEM;
1576 }
1577 memset(info, 0, sizeof(*info));
1578
1579 if (spmi->InterruptType & 1) {
1580 /* We've got a GPE interrupt. */
1581 info->irq = spmi->GPE;
1582 info->irq_setup = acpi_gpe_irq_setup;
1583 info->irq_cleanup = acpi_gpe_irq_cleanup;
1584 } else if (spmi->InterruptType & 2) {
1585 /* We've got an APIC/SAPIC interrupt. */
1586 info->irq = spmi->GlobalSystemInterrupt;
1587 info->irq_setup = std_irq_setup;
1588 info->irq_cleanup = std_irq_cleanup;
1589 } else {
1590 /* Use the default interrupt setting. */
1591 info->irq = 0;
1592 info->irq_setup = NULL;
1593 }
1594
35bc37a0
CM		 1595 if (spmi->addr.register_bit_width) {
1596 /* A (hopefully) properly formed register bit width. */
1597 regspacings[intf_num] = spmi->addr.register_bit_width / 8;
1598 info->io.regspacing = spmi->addr.register_bit_width / 8;
1599 } else {
1600 /* Some broken systems get this wrong and set the value
1601 * to zero. Assume it is the default spacing. If that
1602 * is wrong, too bad, the vendor should fix the tables. */
1603 regspacings[intf_num] = DEFAULT_REGSPACING;
1604 info->io.regspacing = DEFAULT_REGSPACING;
1605 }
1da177e4
LT		 1606 regsizes[intf_num] = regspacings[intf_num];
1607 info->io.regsize = regsizes[intf_num];
1608 regshifts[intf_num] = spmi->addr.register_bit_offset;
1609 info->io.regshift = regshifts[intf_num];
1610
1611 if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
1612 io_type = "memory";
1613 info->io_setup = mem_setup;
1614 addrs[intf_num] = spmi->addr.address;
1615 info->io.info = &(addrs[intf_num]);
1616 } else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
1617 io_type = "I/O";
1618 info->io_setup = port_setup;
1619 ports[intf_num] = spmi->addr.address;
1620 info->io.info = &(ports[intf_num]);
1621 } else {
1622 kfree(info);
1623 printk("ipmi_si: Unknown ACPI I/O Address type\n");
1624 return -EIO;
1625 }
1626
1627 *new_info = info;
1628
1629 printk("ipmi_si: ACPI/SPMI specifies \"%s\" %s SI @ 0x%lx\n",
1630 si_type[intf_num], io_type, (unsigned long) spmi->addr.address);
1631 return 0;
1632}
1633#endif
1634
1635#ifdef CONFIG_X86
1636typedef struct dmi_ipmi_data
1637{
1638 u8 type;
1639 u8 addr_space;
1640 unsigned long base_addr;
1641 u8 irq;
1642 u8 offset;
1643 u8 slave_addr;
1644} dmi_ipmi_data_t;
1645
1646static dmi_ipmi_data_t dmi_data[SI_MAX_DRIVERS];
1647static int dmi_data_entries;
1648
b224cd3a 1649static int __init decode_dmi(struct dmi_header *dm, int intf_num)
1da177e4 1650{
e8b33617 1651 u8 *data = (u8 *)dm;
1da177e4
LT		 1652 unsigned long base_addr;
1653 u8 reg_spacing;
b224cd3a 1654 u8 len = dm->length;
1da177e4
LT		 1655 dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
1656
b224cd3a 1657 ipmi_data->type = data[4];
1da177e4
LT		 1658
1659 memcpy(&base_addr, data+8, sizeof(unsigned long));
1660 if (len >= 0x11) {
1661 if (base_addr & 1) {
1662 /* I/O */
1663 base_addr &= 0xFFFE;
1664 ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
1665 }
1666 else {
1667 /* Memory */
1668 ipmi_data->addr_space = IPMI_MEM_ADDR_SPACE;
1669 }
1670 /* If bit 4 of byte 0x10 is set, then the lsb for the address
1671 is odd. */
b224cd3a 1672 ipmi_data->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
1da177e4 1673
b224cd3a 1674 ipmi_data->irq = data[0x11];
1da177e4
LT		 1675
1676 /* The top two bits of byte 0x10 hold the register spacing. */
b224cd3a 1677 reg_spacing = (data[0x10] & 0xC0) >> 6;
1da177e4
LT		 1678 switch(reg_spacing){
1679 case 0x00: /* Byte boundaries */
1680 ipmi_data->offset = 1;
1681 break;
1682 case 0x01: /* 32-bit boundaries */
1683 ipmi_data->offset = 4;
1684 break;
1685 case 0x02: /* 16-byte boundaries */
1686 ipmi_data->offset = 16;
1687 break;
1688 default:
1689 /* Some other interface, just ignore it. */
1690 return -EIO;
1691 }
1692 } else {
1693 /* Old DMI spec. */
92068801
CM		 1694 /* Note that technically, the lower bit of the base
1695 * address should be 1 if the address is I/O and 0 if
1696 * the address is in memory. So many systems get that
1697 * wrong (and all that I have seen are I/O) so we just
1698 * ignore that bit and assume I/O. Systems that use
1699 * memory should use the newer spec, anyway. */
1700 ipmi_data->base_addr = base_addr & 0xfffe;
1da177e4
LT		 1701 ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
1702 ipmi_data->offset = 1;
1703 }
1704
b224cd3a 1705 ipmi_data->slave_addr = data[6];
1da177e4
LT		 1706
1707 if (is_new_interface(-1, ipmi_data->addr_space,ipmi_data->base_addr)) {
1708 dmi_data_entries++;
1709 return 0;
1710 }
1711
1712 memset(ipmi_data, 0, sizeof(dmi_ipmi_data_t));
1713
1714 return -1;
1715}
1716
b224cd3a 1717static void __init dmi_find_bmc(void)
1da177e4 1718{
b224cd3a 1719 struct dmi_device *dev = NULL;
1da177e4
LT		 1720 int intf_num = 0;
1721
b224cd3a
AP		 1722 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
1723 if (intf_num >= SI_MAX_DRIVERS)
1724 break;
1da177e4 1725
b224cd3a 1726 decode_dmi((struct dmi_header *) dev->device_data, intf_num++);
1da177e4 1727 }
1da177e4
LT		 1728}
1729
1730static int try_init_smbios(int intf_num, struct smi_info **new_info)
1731{
e8b33617
CM		 1732 struct smi_info *info;
1733 dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
1734 char *io_type;
1da177e4
LT		 1735
1736 if (intf_num >= dmi_data_entries)
1737 return -ENODEV;
1738
e8b33617 1739 switch (ipmi_data->type) {
1da177e4
LT		 1740 case 0x01: /* KCS */
1741 si_type[intf_num] = "kcs";
1742 break;
1743 case 0x02: /* SMIC */
1744 si_type[intf_num] = "smic";
1745 break;
1746 case 0x03: /* BT */
1747 si_type[intf_num] = "bt";
1748 break;
1749 default:
1750 return -EIO;
1751 }
1752
1753 info = kmalloc(sizeof(*info), GFP_KERNEL);
e8b33617 1754 if (! info) {
1da177e4
LT		 1755 printk(KERN_ERR "ipmi_si: Could not allocate SI data (4)\n");
1756 return -ENOMEM;
1757 }
1758 memset(info, 0, sizeof(*info));
1759
1760 if (ipmi_data->addr_space == 1) {
1761 io_type = "memory";
1762 info->io_setup = mem_setup;
1763 addrs[intf_num] = ipmi_data->base_addr;
1764 info->io.info = &(addrs[intf_num]);
1765 } else if (ipmi_data->addr_space == 2) {
1766 io_type = "I/O";
1767 info->io_setup = port_setup;
1768 ports[intf_num] = ipmi_data->base_addr;
1769 info->io.info = &(ports[intf_num]);
1770 } else {
1771 kfree(info);
1772 printk("ipmi_si: Unknown SMBIOS I/O Address type.\n");
1773 return -EIO;
1774 }
1775
1776 regspacings[intf_num] = ipmi_data->offset;
1777 info->io.regspacing = regspacings[intf_num];
e8b33617 1778 if (! info->io.regspacing)
1da177e4
LT		 1779 info->io.regspacing = DEFAULT_REGSPACING;
1780 info->io.regsize = DEFAULT_REGSPACING;
1781 info->io.regshift = regshifts[intf_num];
1782
1783 info->slave_addr = ipmi_data->slave_addr;
1784
1785 irqs[intf_num] = ipmi_data->irq;
1786
1787 *new_info = info;
1788
1789 printk("ipmi_si: Found SMBIOS-specified state machine at %s"
1790 " address 0x%lx, slave address 0x%x\n",
1791 io_type, (unsigned long)ipmi_data->base_addr,
1792 ipmi_data->slave_addr);
1793 return 0;
1794}
1795#endif /* CONFIG_X86 */
1796
1797#ifdef CONFIG_PCI
1798
1799#define PCI_ERMC_CLASSCODE 0x0C0700
1800#define PCI_HP_VENDOR_ID 0x103C
1801#define PCI_MMC_DEVICE_ID 0x121A
1802#define PCI_MMC_ADDR_CW 0x10
1803
1804/* Avoid more than one attempt to probe pci smic. */
1805static int pci_smic_checked = 0;
1806
1807static int find_pci_smic(int intf_num, struct smi_info **new_info)
1808{
1809 struct smi_info *info;
1810 int error;
1811 struct pci_dev *pci_dev = NULL;
1812 u16 base_addr;
1813 int fe_rmc = 0;
1814
1815 if (pci_smic_checked)
1816 return -ENODEV;
1817
1818 pci_smic_checked = 1;
1819
e8b33617
CM		 1820 pci_dev = pci_get_device(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID, NULL);
1821 if (! pci_dev) {
1822 pci_dev = pci_get_class(PCI_ERMC_CLASSCODE, NULL);
1823 if (pci_dev && (pci_dev->subsystem_vendor == PCI_HP_VENDOR_ID))
1824 fe_rmc = 1;
1825 else
1826 return -ENODEV;
1827 }
1da177e4
LT		 1828
1829 error = pci_read_config_word(pci_dev, PCI_MMC_ADDR_CW, &base_addr);
1830 if (error)
1831 {
1832 pci_dev_put(pci_dev);
1833 printk(KERN_ERR
1834 "ipmi_si: pci_read_config_word() failed (%d).\n",
1835 error);
1836 return -ENODEV;
1837 }
1838
1839 /* Bit 0: 1 specifies programmed I/O, 0 specifies memory mapped I/O */
e8b33617 1840 if (! (base_addr & 0x0001))
1da177e4
LT		 1841 {
1842 pci_dev_put(pci_dev);
1843 printk(KERN_ERR
1844 "ipmi_si: memory mapped I/O not supported for PCI"
1845 " smic.\n");
1846 return -ENODEV;
1847 }
1848
1849 base_addr &= 0xFFFE;
e8b33617 1850 if (! fe_rmc)
1da177e4
LT		 1851 /* Data register starts at base address + 1 in eRMC */
1852 ++base_addr;
1853
e8b33617 1854 if (! is_new_interface(-1, IPMI_IO_ADDR_SPACE, base_addr)) {
1da177e4
LT		 1855 pci_dev_put(pci_dev);
1856 return -ENODEV;
1857 }
1858
1859 info = kmalloc(sizeof(*info), GFP_KERNEL);
e8b33617 1860 if (! info) {
1da177e4
LT		 1861 pci_dev_put(pci_dev);
1862 printk(KERN_ERR "ipmi_si: Could not allocate SI data (5)\n");
1863 return -ENOMEM;
1864 }
1865 memset(info, 0, sizeof(*info));
1866
1867 info->io_setup = port_setup;
1868 ports[intf_num] = base_addr;
1869 info->io.info = &(ports[intf_num]);
1870 info->io.regspacing = regspacings[intf_num];
e8b33617 1871 if (! info->io.regspacing)
1da177e4
LT		 1872 info->io.regspacing = DEFAULT_REGSPACING;
1873 info->io.regsize = DEFAULT_REGSPACING;
1874 info->io.regshift = regshifts[intf_num];
1875
1876 *new_info = info;
1877
1878 irqs[intf_num] = pci_dev->irq;
1879 si_type[intf_num] = "smic";
1880
1881 printk("ipmi_si: Found PCI SMIC at I/O address 0x%lx\n",
1882 (long unsigned int) base_addr);
1883
1884 pci_dev_put(pci_dev);
1885 return 0;
1886}
1887#endif /* CONFIG_PCI */
1888
1889static int try_init_plug_and_play(int intf_num, struct smi_info **new_info)
1890{
1891#ifdef CONFIG_PCI
e8b33617 1892 if (find_pci_smic(intf_num, new_info) == 0)
1da177e4
LT		 1893 return 0;
1894#endif
1895 /* Include other methods here. */
1896
1897 return -ENODEV;
1898}
1899
1900
1901static int try_get_dev_id(struct smi_info *smi_info)
1902{
1903 unsigned char msg[2];
1904 unsigned char *resp;
1905 unsigned long resp_len;
1906 enum si_sm_result smi_result;
1907 int rv = 0;
1908
1909 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
e8b33617 1910 if (! resp)
1da177e4
LT		 1911 return -ENOMEM;
1912
1913 /* Do a Get Device ID command, since it comes back with some
1914 useful info. */
1915 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
1916 msg[1] = IPMI_GET_DEVICE_ID_CMD;
1917 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
1918
1919 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
1920 for (;;)
1921 {
1922 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1923 set_current_state(TASK_UNINTERRUPTIBLE);
1924 schedule_timeout(1);
1925 smi_result = smi_info->handlers->event(
1926 smi_info->si_sm, 100);
1927 }
1928 else if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1929 {
1930 smi_result = smi_info->handlers->event(
1931 smi_info->si_sm, 0);
1932 }
1933 else
1934 break;
1935 }
1936 if (smi_result == SI_SM_HOSED) {
1937 /* We couldn't get the state machine to run, so whatever's at
1938 the port is probably not an IPMI SMI interface. */
1939 rv = -ENODEV;
1940 goto out;
1941 }
1942
1943 /* Otherwise, we got some data. */
1944 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
1945 resp, IPMI_MAX_MSG_LENGTH);
1946 if (resp_len < 6) {
1947 /* That's odd, it should be longer. */
1948 rv = -EINVAL;
1949 goto out;
1950 }
1951
1952 if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) {
1953 /* That's odd, it shouldn't be able to fail. */
1954 rv = -EINVAL;
1955 goto out;
1956 }
1957
1958 /* Record info from the get device id, in case we need it. */
3ae0e0f9
CM		 1959 memcpy(&smi_info->device_id, &resp[3],
1960 min_t(unsigned long, resp_len-3, sizeof(smi_info->device_id)));
1da177e4
LT		 1961
1962 out:
1963 kfree(resp);
1964 return rv;
1965}
1966
1967static int type_file_read_proc(char *page, char **start, off_t off,
1968 int count, int *eof, void *data)
1969{
1970 char *out = (char *) page;
1971 struct smi_info *smi = data;
1972
1973 switch (smi->si_type) {
1974 case SI_KCS:
1975 return sprintf(out, "kcs\n");
1976 case SI_SMIC:
1977 return sprintf(out, "smic\n");
1978 case SI_BT:
1979 return sprintf(out, "bt\n");
1980 default:
1981 return 0;
1982 }
1983}
1984
1985static int stat_file_read_proc(char *page, char **start, off_t off,
1986 int count, int *eof, void *data)
1987{
1988 char *out = (char *) page;
1989 struct smi_info *smi = data;
1990
1991 out += sprintf(out, "interrupts_enabled: %d\n",
e8b33617 1992 smi->irq && ! smi->interrupt_disabled);
1da177e4
LT		 1993 out += sprintf(out, "short_timeouts: %ld\n",
1994 smi->short_timeouts);
1995 out += sprintf(out, "long_timeouts: %ld\n",
1996 smi->long_timeouts);
1997 out += sprintf(out, "timeout_restarts: %ld\n",
1998 smi->timeout_restarts);
1999 out += sprintf(out, "idles: %ld\n",
2000 smi->idles);
2001 out += sprintf(out, "interrupts: %ld\n",
2002 smi->interrupts);
2003 out += sprintf(out, "attentions: %ld\n",
2004 smi->attentions);
2005 out += sprintf(out, "flag_fetches: %ld\n",
2006 smi->flag_fetches);
2007 out += sprintf(out, "hosed_count: %ld\n",
2008 smi->hosed_count);
2009 out += sprintf(out, "complete_transactions: %ld\n",
2010 smi->complete_transactions);
2011 out += sprintf(out, "events: %ld\n",
2012 smi->events);
2013 out += sprintf(out, "watchdog_pretimeouts: %ld\n",
2014 smi->watchdog_pretimeouts);
2015 out += sprintf(out, "incoming_messages: %ld\n",
2016 smi->incoming_messages);
2017
2018 return (out - ((char *) page));
2019}
2020
3ae0e0f9
CM		 2021/*
2022 * oem_data_avail_to_receive_msg_avail
2023 * @info - smi_info structure with msg_flags set
2024 *
2025 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2026 * Returns 1 indicating need to re-run handle_flags().
2027 */
2028static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2029{
e8b33617
CM		 2030 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2031 RECEIVE_MSG_AVAIL);
3ae0e0f9
CM		 2032 return 1;
2033}
2034
2035/*
2036 * setup_dell_poweredge_oem_data_handler
2037 * @info - smi_info.device_id must be populated
2038 *
2039 * Systems that match, but have firmware version < 1.40 may assert
2040 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2041 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2042 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2043 * as RECEIVE_MSG_AVAIL instead.
2044 *
2045 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2046 * assert the OEM[012] bits, and if it did, the driver would have to
2047 * change to handle that properly, we don't actually check for the
2048 * firmware version.
2049 * Device ID = 0x20 BMC on PowerEdge 8G servers
2050 * Device Revision = 0x80
2051 * Firmware Revision1 = 0x01 BMC version 1.40
2052 * Firmware Revision2 = 0x40 BCD encoded
2053 * IPMI Version = 0x51 IPMI 1.5
2054 * Manufacturer ID = A2 02 00 Dell IANA
2055 *
2056 */
2057#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2058#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2059#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2060#define DELL_IANA_MFR_ID {0xA2, 0x02, 0x00}
2061static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2062{
2063 struct ipmi_device_id *id = &smi_info->device_id;
2064 const char mfr[3]=DELL_IANA_MFR_ID;
e8b33617
CM		 2065 if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr))
2066 && (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID)
2067 && (id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV)
2068 && (id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION))
2069 {
3ae0e0f9
CM		 2070 smi_info->oem_data_avail_handler =
2071 oem_data_avail_to_receive_msg_avail;
2072 }
2073}
2074
2075/*
2076 * setup_oem_data_handler
2077 * @info - smi_info.device_id must be filled in already
2078 *
2079 * Fills in smi_info.device_id.oem_data_available_handler
2080 * when we know what function to use there.
2081 */
2082
2083static void setup_oem_data_handler(struct smi_info *smi_info)
2084{
2085 setup_dell_poweredge_oem_data_handler(smi_info);
2086}
2087
1da177e4
LT		 2088/* Returns 0 if initialized, or negative on an error. */
2089static int init_one_smi(int intf_num, struct smi_info **smi)
2090{
2091 int rv;
2092 struct smi_info *new_smi;
2093
2094
2095 rv = try_init_mem(intf_num, &new_smi);
2096 if (rv)
2097 rv = try_init_port(intf_num, &new_smi);
8466361a 2098#ifdef CONFIG_ACPI
e8b33617 2099 if (rv && si_trydefaults)
1da177e4 2100 rv = try_init_acpi(intf_num, &new_smi);
1da177e4
LT		 2101#endif
2102#ifdef CONFIG_X86
e8b33617 2103 if (rv && si_trydefaults)
1da177e4 2104 rv = try_init_smbios(intf_num, &new_smi);
1da177e4 2105#endif
e8b33617 2106 if (rv && si_trydefaults)
1da177e4 2107 rv = try_init_plug_and_play(intf_num, &new_smi);
1da177e4
LT		 2108
2109 if (rv)
2110 return rv;
2111
2112 /* So we know not to free it unless we have allocated one. */
2113 new_smi->intf = NULL;
2114 new_smi->si_sm = NULL;
2115 new_smi->handlers = NULL;
2116
e8b33617 2117 if (! new_smi->irq_setup) {
1da177e4
LT		 2118 new_smi->irq = irqs[intf_num];
2119 new_smi->irq_setup = std_irq_setup;
2120 new_smi->irq_cleanup = std_irq_cleanup;
2121 }
2122
2123 /* Default to KCS if no type is specified. */
2124 if (si_type[intf_num] == NULL) {
2125 if (si_trydefaults)
2126 si_type[intf_num] = "kcs";
2127 else {
2128 rv = -EINVAL;
2129 goto out_err;
2130 }
2131 }
2132
2133 /* Set up the state machine to use. */
2134 if (strcmp(si_type[intf_num], "kcs") == 0) {
2135 new_smi->handlers = &kcs_smi_handlers;
2136 new_smi->si_type = SI_KCS;
2137 } else if (strcmp(si_type[intf_num], "smic") == 0) {
2138 new_smi->handlers = &smic_smi_handlers;
2139 new_smi->si_type = SI_SMIC;
2140 } else if (strcmp(si_type[intf_num], "bt") == 0) {
2141 new_smi->handlers = &bt_smi_handlers;
2142 new_smi->si_type = SI_BT;
2143 } else {
2144 /* No support for anything else yet. */
2145 rv = -EIO;
2146 goto out_err;
2147 }
2148
2149 /* Allocate the state machine's data and initialize it. */
2150 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
e8b33617 2151 if (! new_smi->si_sm) {
1da177e4
LT		 2152 printk(" Could not allocate state machine memory\n");
2153 rv = -ENOMEM;
2154 goto out_err;
2155 }
2156 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
2157 &new_smi->io);
2158
2159 /* Now that we know the I/O size, we can set up the I/O. */
2160 rv = new_smi->io_setup(new_smi);
2161 if (rv) {
2162 printk(" Could not set up I/O space\n");
2163 goto out_err;
2164 }
2165
2166 spin_lock_init(&(new_smi->si_lock));
2167 spin_lock_init(&(new_smi->msg_lock));
2168 spin_lock_init(&(new_smi->count_lock));
2169
2170 /* Do low-level detection first. */
2171 if (new_smi->handlers->detect(new_smi->si_sm)) {
2172 rv = -ENODEV;
2173 goto out_err;
2174 }
2175
2176 /* Attempt a get device id command. If it fails, we probably
2177 don't have a SMI here. */
2178 rv = try_get_dev_id(new_smi);
2179 if (rv)
2180 goto out_err;
2181
3ae0e0f9
CM		 2182 setup_oem_data_handler(new_smi);
2183
1da177e4
LT		 2184 /* Try to claim any interrupts. */
2185 new_smi->irq_setup(new_smi);
2186
2187 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
2188 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
2189 new_smi->curr_msg = NULL;
2190 atomic_set(&new_smi->req_events, 0);
2191 new_smi->run_to_completion = 0;
2192
2193 new_smi->interrupt_disabled = 0;
2194 new_smi->timer_stopped = 0;
2195 new_smi->stop_operation = 0;
2196
2197 /* Start clearing the flags before we enable interrupts or the
2198 timer to avoid racing with the timer. */
2199 start_clear_flags(new_smi);
2200 /* IRQ is defined to be set when non-zero. */
2201 if (new_smi->irq)
2202 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
2203
2204 /* The ipmi_register_smi() code does some operations to
2205 determine the channel information, so we must be ready to
2206 handle operations before it is called. This means we have
2207 to stop the timer if we get an error after this point. */
2208 init_timer(&(new_smi->si_timer));
2209 new_smi->si_timer.data = (long) new_smi;
2210 new_smi->si_timer.function = smi_timeout;
2211 new_smi->last_timeout_jiffies = jiffies;
2212 new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
2213 add_timer(&(new_smi->si_timer));
2214
2215 rv = ipmi_register_smi(&handlers,
2216 new_smi,
3ae0e0f9
CM		 2217 ipmi_version_major(&new_smi->device_id),
2218 ipmi_version_minor(&new_smi->device_id),
1da177e4
LT		 2219 new_smi->slave_addr,
2220 &(new_smi->intf));
2221 if (rv) {
2222 printk(KERN_ERR
2223 "ipmi_si: Unable to register device: error %d\n",
2224 rv);
2225 goto out_err_stop_timer;
2226 }
2227
2228 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
2229 type_file_read_proc, NULL,
2230 new_smi, THIS_MODULE);
2231 if (rv) {
2232 printk(KERN_ERR
2233 "ipmi_si: Unable to create proc entry: %d\n",
2234 rv);
2235 goto out_err_stop_timer;
2236 }
2237
2238 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
2239 stat_file_read_proc, NULL,
2240 new_smi, THIS_MODULE);
2241 if (rv) {
2242 printk(KERN_ERR
2243 "ipmi_si: Unable to create proc entry: %d\n",
2244 rv);
2245 goto out_err_stop_timer;
2246 }
2247
2248 *smi = new_smi;
2249
2250 printk(" IPMI %s interface initialized\n", si_type[intf_num]);
2251
2252 return 0;
2253
2254 out_err_stop_timer:
2255 new_smi->stop_operation = 1;
2256
2257 /* Wait for the timer to stop. This avoids problems with race
2258 conditions removing the timer here. */
e8b33617 2259 while (! new_smi->timer_stopped) {
1da177e4
LT		 2260 set_current_state(TASK_UNINTERRUPTIBLE);
2261 schedule_timeout(1);
2262 }
2263
2264 out_err:
2265 if (new_smi->intf)
2266 ipmi_unregister_smi(new_smi->intf);
2267
2268 new_smi->irq_cleanup(new_smi);
2269
2270 /* Wait until we know that we are out of any interrupt
2271 handlers might have been running before we freed the
2272 interrupt. */
fbd568a3 2273 synchronize_sched();
1da177e4
LT		 2274
2275 if (new_smi->si_sm) {
2276 if (new_smi->handlers)
2277 new_smi->handlers->cleanup(new_smi->si_sm);
2278 kfree(new_smi->si_sm);
2279 }
2280 new_smi->io_cleanup(new_smi);
2281
2282 return rv;
2283}
2284
2285static __init int init_ipmi_si(void)
2286{
2287 int rv = 0;
2288 int pos = 0;
2289 int i;
2290 char *str;
2291
2292 if (initialized)
2293 return 0;
2294 initialized = 1;
2295
2296 /* Parse out the si_type string into its components. */
2297 str = si_type_str;
2298 if (*str != '\0') {
e8b33617 2299 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
1da177e4
LT		 2300 si_type[i] = str;
2301 str = strchr(str, ',');
2302 if (str) {
2303 *str = '\0';
2304 str++;
2305 } else {
2306 break;
2307 }
2308 }
2309 }
2310
1fdd75bd 2311 printk(KERN_INFO "IPMI System Interface driver.\n");
1da177e4
LT		 2312
2313#ifdef CONFIG_X86
b224cd3a 2314 dmi_find_bmc();
1da177e4
LT		 2315#endif
2316
2317 rv = init_one_smi(0, &(smi_infos[pos]));
e8b33617 2318 if (rv && ! ports[0] && si_trydefaults) {
1da177e4
LT		 2319 /* If we are trying defaults and the initial port is
2320 not set, then set it. */
2321 si_type[0] = "kcs";
2322 ports[0] = DEFAULT_KCS_IO_PORT;
2323 rv = init_one_smi(0, &(smi_infos[pos]));
2324 if (rv) {
2325 /* No KCS - try SMIC */
2326 si_type[0] = "smic";
2327 ports[0] = DEFAULT_SMIC_IO_PORT;
2328 rv = init_one_smi(0, &(smi_infos[pos]));
2329 }
2330 if (rv) {
2331 /* No SMIC - try BT */
2332 si_type[0] = "bt";
2333 ports[0] = DEFAULT_BT_IO_PORT;
2334 rv = init_one_smi(0, &(smi_infos[pos]));
2335 }
2336 }
2337 if (rv == 0)
2338 pos++;
2339
e8b33617 2340 for (i = 1; i < SI_MAX_PARMS; i++) {
1da177e4
LT		 2341 rv = init_one_smi(i, &(smi_infos[pos]));
2342 if (rv == 0)
2343 pos++;
2344 }
2345
2346 if (smi_infos[0] == NULL) {
2347 printk("ipmi_si: Unable to find any System Interface(s)\n");
2348 return -ENODEV;
2349 }
2350
2351 return 0;
2352}
2353module_init(init_ipmi_si);
2354
2355static void __exit cleanup_one_si(struct smi_info *to_clean)
2356{
2357 int rv;
2358 unsigned long flags;
2359
2360 if (! to_clean)
2361 return;
2362
2363 /* Tell the timer and interrupt handlers that we are shutting
2364 down. */
2365 spin_lock_irqsave(&(to_clean->si_lock), flags);
2366 spin_lock(&(to_clean->msg_lock));
2367
2368 to_clean->stop_operation = 1;
2369
2370 to_clean->irq_cleanup(to_clean);
2371
2372 spin_unlock(&(to_clean->msg_lock));
2373 spin_unlock_irqrestore(&(to_clean->si_lock), flags);
2374
2375 /* Wait until we know that we are out of any interrupt
2376 handlers might have been running before we freed the
2377 interrupt. */
fbd568a3 2378 synchronize_sched();
1da177e4
LT		 2379
2380 /* Wait for the timer to stop. This avoids problems with race
2381 conditions removing the timer here. */
e8b33617 2382 while (! to_clean->timer_stopped) {
1da177e4
LT		 2383 set_current_state(TASK_UNINTERRUPTIBLE);
2384 schedule_timeout(1);
2385 }
2386
2387 /* Interrupts and timeouts are stopped, now make sure the
2388 interface is in a clean state. */
e8b33617 2389 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
1da177e4
LT		 2390 poll(to_clean);
2391 set_current_state(TASK_UNINTERRUPTIBLE);
2392 schedule_timeout(1);
2393 }
2394
2395 rv = ipmi_unregister_smi(to_clean->intf);
2396 if (rv) {
2397 printk(KERN_ERR
2398 "ipmi_si: Unable to unregister device: errno=%d\n",
2399 rv);
2400 }
2401
2402 to_clean->handlers->cleanup(to_clean->si_sm);
2403
2404 kfree(to_clean->si_sm);
2405
2406 to_clean->io_cleanup(to_clean);
2407}
2408
2409static __exit void cleanup_ipmi_si(void)
2410{
2411 int i;
2412
e8b33617 2413 if (! initialized)
1da177e4
LT		 2414 return;
2415
e8b33617 2416 for (i = 0; i < SI_MAX_DRIVERS; i++) {
1da177e4
LT		 2417 cleanup_one_si(smi_infos[i]);
2418 }
2419}
2420module_exit(cleanup_ipmi_si);
2421
2422MODULE_LICENSE("GPL");
1fdd75bd
CM		 2423MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
2424MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT system interfaces.");
Linux kernel - Deliverables
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