4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
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>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi_smi.h>
62 #include "ipmi_si_sm.h"
63 #include <linux/init.h>
64 #include <linux/dmi.h>
65 #include <linux/string.h>
66 #include <linux/ctype.h>
69 #include <linux/of_device.h>
70 #include <linux/of_platform.h>
73 #define PFX "ipmi_si: "
75 /* Measure times between events in the driver. */
78 /* Call every 10 ms. */
79 #define SI_TIMEOUT_TIME_USEC 10000
80 #define SI_USEC_PER_JIFFY (1000000/HZ)
81 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
82 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
85 /* Bit for BMC global enables. */
86 #define IPMI_BMC_RCV_MSG_INTR 0x01
87 #define IPMI_BMC_EVT_MSG_INTR 0x02
88 #define IPMI_BMC_EVT_MSG_BUFF 0x04
89 #define IPMI_BMC_SYS_LOG 0x08
96 SI_CLEARING_FLAGS_THEN_SET_IRQ
,
98 SI_ENABLE_INTERRUPTS1
,
99 SI_ENABLE_INTERRUPTS2
,
100 SI_DISABLE_INTERRUPTS1
,
101 SI_DISABLE_INTERRUPTS2
102 /* FIXME - add watchdog stuff. */
105 /* Some BT-specific defines we need here. */
106 #define IPMI_BT_INTMASK_REG 2
107 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
108 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
111 SI_KCS
, SI_SMIC
, SI_BT
113 static char *si_to_str
[] = { "kcs", "smic", "bt" };
115 #define DEVICE_NAME "ipmi_si"
117 static struct platform_driver ipmi_driver
= {
120 .bus
= &platform_bus_type
126 * Indexes into stats[] in smi_info below.
128 enum si_stat_indexes
{
130 * Number of times the driver requested a timer while an operation
133 SI_STAT_short_timeouts
= 0,
136 * Number of times the driver requested a timer while nothing was in
139 SI_STAT_long_timeouts
,
141 /* Number of times the interface was idle while being polled. */
144 /* Number of interrupts the driver handled. */
147 /* Number of time the driver got an ATTN from the hardware. */
150 /* Number of times the driver requested flags from the hardware. */
151 SI_STAT_flag_fetches
,
153 /* Number of times the hardware didn't follow the state machine. */
156 /* Number of completed messages. */
157 SI_STAT_complete_transactions
,
159 /* Number of IPMI events received from the hardware. */
162 /* Number of watchdog pretimeouts. */
163 SI_STAT_watchdog_pretimeouts
,
165 /* Number of asyncronous messages received. */
166 SI_STAT_incoming_messages
,
169 /* This *must* remain last, add new values above this. */
176 struct si_sm_data
*si_sm
;
177 struct si_sm_handlers
*handlers
;
178 enum si_type si_type
;
181 struct list_head xmit_msgs
;
182 struct list_head hp_xmit_msgs
;
183 struct ipmi_smi_msg
*curr_msg
;
184 enum si_intf_state si_state
;
187 * Used to handle the various types of I/O that can occur with
191 int (*io_setup
)(struct smi_info
*info
);
192 void (*io_cleanup
)(struct smi_info
*info
);
193 int (*irq_setup
)(struct smi_info
*info
);
194 void (*irq_cleanup
)(struct smi_info
*info
);
195 unsigned int io_size
;
196 char *addr_source
; /* ACPI, PCI, SMBIOS, hardcode, default. */
197 void (*addr_source_cleanup
)(struct smi_info
*info
);
198 void *addr_source_data
;
201 * Per-OEM handler, called from handle_flags(). Returns 1
202 * when handle_flags() needs to be re-run or 0 indicating it
203 * set si_state itself.
205 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
208 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
209 * is set to hold the flags until we are done handling everything
212 #define RECEIVE_MSG_AVAIL 0x01
213 #define EVENT_MSG_BUFFER_FULL 0x02
214 #define WDT_PRE_TIMEOUT_INT 0x08
215 #define OEM0_DATA_AVAIL 0x20
216 #define OEM1_DATA_AVAIL 0x40
217 #define OEM2_DATA_AVAIL 0x80
218 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
221 unsigned char msg_flags
;
224 * If set to true, this will request events the next time the
225 * state machine is idle.
230 * If true, run the state machine to completion on every send
231 * call. Generally used after a panic to make sure stuff goes
234 int run_to_completion
;
236 /* The I/O port of an SI interface. */
240 * The space between start addresses of the two ports. For
241 * instance, if the first port is 0xca2 and the spacing is 4, then
242 * the second port is 0xca6.
244 unsigned int spacing
;
246 /* zero if no irq; */
249 /* The timer for this si. */
250 struct timer_list si_timer
;
252 /* The time (in jiffies) the last timeout occurred at. */
253 unsigned long last_timeout_jiffies
;
255 /* Used to gracefully stop the timer without race conditions. */
256 atomic_t stop_operation
;
259 * The driver will disable interrupts when it gets into a
260 * situation where it cannot handle messages due to lack of
261 * memory. Once that situation clears up, it will re-enable
264 int interrupt_disabled
;
266 /* From the get device id response... */
267 struct ipmi_device_id device_id
;
269 /* Driver model stuff. */
271 struct platform_device
*pdev
;
274 * True if we allocated the device, false if it came from
275 * someplace else (like PCI).
279 /* Slave address, could be reported from DMI. */
280 unsigned char slave_addr
;
282 /* Counters and things for the proc filesystem. */
283 atomic_t stats
[SI_NUM_STATS
];
285 struct task_struct
*thread
;
287 struct list_head link
;
290 #define smi_inc_stat(smi, stat) \
291 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
292 #define smi_get_stat(smi, stat) \
293 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
295 #define SI_MAX_PARMS 4
297 static int force_kipmid
[SI_MAX_PARMS
];
298 static int num_force_kipmid
;
300 static int unload_when_empty
= 1;
302 static int try_smi_init(struct smi_info
*smi
);
303 static void cleanup_one_si(struct smi_info
*to_clean
);
305 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
306 static int register_xaction_notifier(struct notifier_block
*nb
)
308 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
311 static void deliver_recv_msg(struct smi_info
*smi_info
,
312 struct ipmi_smi_msg
*msg
)
314 /* Deliver the message to the upper layer with the lock
316 spin_unlock(&(smi_info
->si_lock
));
317 ipmi_smi_msg_received(smi_info
->intf
, msg
);
318 spin_lock(&(smi_info
->si_lock
));
321 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
323 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
325 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
326 cCode
= IPMI_ERR_UNSPECIFIED
;
327 /* else use it as is */
329 /* Make it a reponse */
330 msg
->rsp
[0] = msg
->data
[0] | 4;
331 msg
->rsp
[1] = msg
->data
[1];
335 smi_info
->curr_msg
= NULL
;
336 deliver_recv_msg(smi_info
, msg
);
339 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
342 struct list_head
*entry
= NULL
;
348 * No need to save flags, we aleady have interrupts off and we
349 * already hold the SMI lock.
351 if (!smi_info
->run_to_completion
)
352 spin_lock(&(smi_info
->msg_lock
));
354 /* Pick the high priority queue first. */
355 if (!list_empty(&(smi_info
->hp_xmit_msgs
))) {
356 entry
= smi_info
->hp_xmit_msgs
.next
;
357 } else if (!list_empty(&(smi_info
->xmit_msgs
))) {
358 entry
= smi_info
->xmit_msgs
.next
;
362 smi_info
->curr_msg
= NULL
;
368 smi_info
->curr_msg
= list_entry(entry
,
373 printk(KERN_DEBUG
"**Start2: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
375 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
377 if (err
& NOTIFY_STOP_MASK
) {
378 rv
= SI_SM_CALL_WITHOUT_DELAY
;
381 err
= smi_info
->handlers
->start_transaction(
383 smi_info
->curr_msg
->data
,
384 smi_info
->curr_msg
->data_size
);
386 return_hosed_msg(smi_info
, err
);
388 rv
= SI_SM_CALL_WITHOUT_DELAY
;
391 if (!smi_info
->run_to_completion
)
392 spin_unlock(&(smi_info
->msg_lock
));
397 static void start_enable_irq(struct smi_info
*smi_info
)
399 unsigned char msg
[2];
402 * If we are enabling interrupts, we have to tell the
405 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
406 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
408 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
409 smi_info
->si_state
= SI_ENABLE_INTERRUPTS1
;
412 static void start_disable_irq(struct smi_info
*smi_info
)
414 unsigned char msg
[2];
416 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
417 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
419 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
420 smi_info
->si_state
= SI_DISABLE_INTERRUPTS1
;
423 static void start_clear_flags(struct smi_info
*smi_info
)
425 unsigned char msg
[3];
427 /* Make sure the watchdog pre-timeout flag is not set at startup. */
428 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
429 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
430 msg
[2] = WDT_PRE_TIMEOUT_INT
;
432 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
433 smi_info
->si_state
= SI_CLEARING_FLAGS
;
437 * When we have a situtaion where we run out of memory and cannot
438 * allocate messages, we just leave them in the BMC and run the system
439 * polled until we can allocate some memory. Once we have some
440 * memory, we will re-enable the interrupt.
442 static inline void disable_si_irq(struct smi_info
*smi_info
)
444 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
445 start_disable_irq(smi_info
);
446 smi_info
->interrupt_disabled
= 1;
450 static inline void enable_si_irq(struct smi_info
*smi_info
)
452 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
453 start_enable_irq(smi_info
);
454 smi_info
->interrupt_disabled
= 0;
458 static void handle_flags(struct smi_info
*smi_info
)
461 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
462 /* Watchdog pre-timeout */
463 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
465 start_clear_flags(smi_info
);
466 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
467 spin_unlock(&(smi_info
->si_lock
));
468 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
469 spin_lock(&(smi_info
->si_lock
));
470 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
471 /* Messages available. */
472 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
473 if (!smi_info
->curr_msg
) {
474 disable_si_irq(smi_info
);
475 smi_info
->si_state
= SI_NORMAL
;
478 enable_si_irq(smi_info
);
480 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
481 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
482 smi_info
->curr_msg
->data_size
= 2;
484 smi_info
->handlers
->start_transaction(
486 smi_info
->curr_msg
->data
,
487 smi_info
->curr_msg
->data_size
);
488 smi_info
->si_state
= SI_GETTING_MESSAGES
;
489 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
490 /* Events available. */
491 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
492 if (!smi_info
->curr_msg
) {
493 disable_si_irq(smi_info
);
494 smi_info
->si_state
= SI_NORMAL
;
497 enable_si_irq(smi_info
);
499 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
500 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
501 smi_info
->curr_msg
->data_size
= 2;
503 smi_info
->handlers
->start_transaction(
505 smi_info
->curr_msg
->data
,
506 smi_info
->curr_msg
->data_size
);
507 smi_info
->si_state
= SI_GETTING_EVENTS
;
508 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
509 smi_info
->oem_data_avail_handler
) {
510 if (smi_info
->oem_data_avail_handler(smi_info
))
513 smi_info
->si_state
= SI_NORMAL
;
516 static void handle_transaction_done(struct smi_info
*smi_info
)
518 struct ipmi_smi_msg
*msg
;
523 printk(KERN_DEBUG
"**Done: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
525 switch (smi_info
->si_state
) {
527 if (!smi_info
->curr_msg
)
530 smi_info
->curr_msg
->rsp_size
531 = smi_info
->handlers
->get_result(
533 smi_info
->curr_msg
->rsp
,
534 IPMI_MAX_MSG_LENGTH
);
537 * Do this here becase deliver_recv_msg() releases the
538 * lock, and a new message can be put in during the
539 * time the lock is released.
541 msg
= smi_info
->curr_msg
;
542 smi_info
->curr_msg
= NULL
;
543 deliver_recv_msg(smi_info
, msg
);
546 case SI_GETTING_FLAGS
:
548 unsigned char msg
[4];
551 /* We got the flags from the SMI, now handle them. */
552 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
554 /* Error fetching flags, just give up for now. */
555 smi_info
->si_state
= SI_NORMAL
;
556 } else if (len
< 4) {
558 * Hmm, no flags. That's technically illegal, but
559 * don't use uninitialized data.
561 smi_info
->si_state
= SI_NORMAL
;
563 smi_info
->msg_flags
= msg
[3];
564 handle_flags(smi_info
);
569 case SI_CLEARING_FLAGS
:
570 case SI_CLEARING_FLAGS_THEN_SET_IRQ
:
572 unsigned char msg
[3];
574 /* We cleared the flags. */
575 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
577 /* Error clearing flags */
579 "ipmi_si: Error clearing flags: %2.2x\n",
582 if (smi_info
->si_state
== SI_CLEARING_FLAGS_THEN_SET_IRQ
)
583 start_enable_irq(smi_info
);
585 smi_info
->si_state
= SI_NORMAL
;
589 case SI_GETTING_EVENTS
:
591 smi_info
->curr_msg
->rsp_size
592 = smi_info
->handlers
->get_result(
594 smi_info
->curr_msg
->rsp
,
595 IPMI_MAX_MSG_LENGTH
);
598 * Do this here becase deliver_recv_msg() releases the
599 * lock, and a new message can be put in during the
600 * time the lock is released.
602 msg
= smi_info
->curr_msg
;
603 smi_info
->curr_msg
= NULL
;
604 if (msg
->rsp
[2] != 0) {
605 /* Error getting event, probably done. */
608 /* Take off the event flag. */
609 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
610 handle_flags(smi_info
);
612 smi_inc_stat(smi_info
, events
);
615 * Do this before we deliver the message
616 * because delivering the message releases the
617 * lock and something else can mess with the
620 handle_flags(smi_info
);
622 deliver_recv_msg(smi_info
, msg
);
627 case SI_GETTING_MESSAGES
:
629 smi_info
->curr_msg
->rsp_size
630 = smi_info
->handlers
->get_result(
632 smi_info
->curr_msg
->rsp
,
633 IPMI_MAX_MSG_LENGTH
);
636 * Do this here becase deliver_recv_msg() releases the
637 * lock, and a new message can be put in during the
638 * time the lock is released.
640 msg
= smi_info
->curr_msg
;
641 smi_info
->curr_msg
= NULL
;
642 if (msg
->rsp
[2] != 0) {
643 /* Error getting event, probably done. */
646 /* Take off the msg flag. */
647 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
648 handle_flags(smi_info
);
650 smi_inc_stat(smi_info
, incoming_messages
);
653 * Do this before we deliver the message
654 * because delivering the message releases the
655 * lock and something else can mess with the
658 handle_flags(smi_info
);
660 deliver_recv_msg(smi_info
, msg
);
665 case SI_ENABLE_INTERRUPTS1
:
667 unsigned char msg
[4];
669 /* We got the flags from the SMI, now handle them. */
670 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
673 "ipmi_si: Could not enable interrupts"
674 ", failed get, using polled mode.\n");
675 smi_info
->si_state
= SI_NORMAL
;
677 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
678 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
680 IPMI_BMC_RCV_MSG_INTR
|
681 IPMI_BMC_EVT_MSG_INTR
);
682 smi_info
->handlers
->start_transaction(
683 smi_info
->si_sm
, msg
, 3);
684 smi_info
->si_state
= SI_ENABLE_INTERRUPTS2
;
689 case SI_ENABLE_INTERRUPTS2
:
691 unsigned char msg
[4];
693 /* We got the flags from the SMI, now handle them. */
694 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
697 "ipmi_si: Could not enable interrupts"
698 ", failed set, using polled mode.\n");
700 smi_info
->si_state
= SI_NORMAL
;
704 case SI_DISABLE_INTERRUPTS1
:
706 unsigned char msg
[4];
708 /* We got the flags from the SMI, now handle them. */
709 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
712 "ipmi_si: Could not disable interrupts"
714 smi_info
->si_state
= SI_NORMAL
;
716 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
717 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
719 ~(IPMI_BMC_RCV_MSG_INTR
|
720 IPMI_BMC_EVT_MSG_INTR
));
721 smi_info
->handlers
->start_transaction(
722 smi_info
->si_sm
, msg
, 3);
723 smi_info
->si_state
= SI_DISABLE_INTERRUPTS2
;
728 case SI_DISABLE_INTERRUPTS2
:
730 unsigned char msg
[4];
732 /* We got the flags from the SMI, now handle them. */
733 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
736 "ipmi_si: Could not disable interrupts"
739 smi_info
->si_state
= SI_NORMAL
;
746 * Called on timeouts and events. Timeouts should pass the elapsed
747 * time, interrupts should pass in zero. Must be called with
748 * si_lock held and interrupts disabled.
750 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
753 enum si_sm_result si_sm_result
;
757 * There used to be a loop here that waited a little while
758 * (around 25us) before giving up. That turned out to be
759 * pointless, the minimum delays I was seeing were in the 300us
760 * range, which is far too long to wait in an interrupt. So
761 * we just run until the state machine tells us something
762 * happened or it needs a delay.
764 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
766 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
767 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
769 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
770 smi_inc_stat(smi_info
, complete_transactions
);
772 handle_transaction_done(smi_info
);
773 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
774 } else if (si_sm_result
== SI_SM_HOSED
) {
775 smi_inc_stat(smi_info
, hosed_count
);
778 * Do the before return_hosed_msg, because that
781 smi_info
->si_state
= SI_NORMAL
;
782 if (smi_info
->curr_msg
!= NULL
) {
784 * If we were handling a user message, format
785 * a response to send to the upper layer to
786 * tell it about the error.
788 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
790 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
794 * We prefer handling attn over new messages. But don't do
795 * this if there is not yet an upper layer to handle anything.
797 if (likely(smi_info
->intf
) && si_sm_result
== SI_SM_ATTN
) {
798 unsigned char msg
[2];
800 smi_inc_stat(smi_info
, attentions
);
803 * Got a attn, send down a get message flags to see
804 * what's causing it. It would be better to handle
805 * this in the upper layer, but due to the way
806 * interrupts work with the SMI, that's not really
809 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
810 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
812 smi_info
->handlers
->start_transaction(
813 smi_info
->si_sm
, msg
, 2);
814 smi_info
->si_state
= SI_GETTING_FLAGS
;
818 /* If we are currently idle, try to start the next message. */
819 if (si_sm_result
== SI_SM_IDLE
) {
820 smi_inc_stat(smi_info
, idles
);
822 si_sm_result
= start_next_msg(smi_info
);
823 if (si_sm_result
!= SI_SM_IDLE
)
827 if ((si_sm_result
== SI_SM_IDLE
)
828 && (atomic_read(&smi_info
->req_events
))) {
830 * We are idle and the upper layer requested that I fetch
833 atomic_set(&smi_info
->req_events
, 0);
835 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
836 if (!smi_info
->curr_msg
)
839 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
840 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
841 smi_info
->curr_msg
->data_size
= 2;
843 smi_info
->handlers
->start_transaction(
845 smi_info
->curr_msg
->data
,
846 smi_info
->curr_msg
->data_size
);
847 smi_info
->si_state
= SI_GETTING_EVENTS
;
854 static void sender(void *send_info
,
855 struct ipmi_smi_msg
*msg
,
858 struct smi_info
*smi_info
= send_info
;
859 enum si_sm_result result
;
865 if (atomic_read(&smi_info
->stop_operation
)) {
866 msg
->rsp
[0] = msg
->data
[0] | 4;
867 msg
->rsp
[1] = msg
->data
[1];
868 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
870 deliver_recv_msg(smi_info
, msg
);
876 printk("**Enqueue: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
879 if (smi_info
->run_to_completion
) {
881 * If we are running to completion, then throw it in
882 * the list and run transactions until everything is
883 * clear. Priority doesn't matter here.
887 * Run to completion means we are single-threaded, no
890 list_add_tail(&(msg
->link
), &(smi_info
->xmit_msgs
));
892 result
= smi_event_handler(smi_info
, 0);
893 while (result
!= SI_SM_IDLE
) {
894 udelay(SI_SHORT_TIMEOUT_USEC
);
895 result
= smi_event_handler(smi_info
,
896 SI_SHORT_TIMEOUT_USEC
);
901 spin_lock_irqsave(&smi_info
->msg_lock
, flags
);
903 list_add_tail(&msg
->link
, &smi_info
->hp_xmit_msgs
);
905 list_add_tail(&msg
->link
, &smi_info
->xmit_msgs
);
906 spin_unlock_irqrestore(&smi_info
->msg_lock
, flags
);
908 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
909 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
)
910 start_next_msg(smi_info
);
911 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
914 static void set_run_to_completion(void *send_info
, int i_run_to_completion
)
916 struct smi_info
*smi_info
= send_info
;
917 enum si_sm_result result
;
919 smi_info
->run_to_completion
= i_run_to_completion
;
920 if (i_run_to_completion
) {
921 result
= smi_event_handler(smi_info
, 0);
922 while (result
!= SI_SM_IDLE
) {
923 udelay(SI_SHORT_TIMEOUT_USEC
);
924 result
= smi_event_handler(smi_info
,
925 SI_SHORT_TIMEOUT_USEC
);
930 static int ipmi_thread(void *data
)
932 struct smi_info
*smi_info
= data
;
934 enum si_sm_result smi_result
;
936 set_user_nice(current
, 19);
937 while (!kthread_should_stop()) {
938 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
939 smi_result
= smi_event_handler(smi_info
, 0);
940 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
941 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
943 else if (smi_result
== SI_SM_CALL_WITH_DELAY
)
946 schedule_timeout_interruptible(1);
952 static void poll(void *send_info
)
954 struct smi_info
*smi_info
= send_info
;
958 * Make sure there is some delay in the poll loop so we can
959 * drive time forward and timeout things.
962 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
963 smi_event_handler(smi_info
, 10);
964 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
967 static void request_events(void *send_info
)
969 struct smi_info
*smi_info
= send_info
;
971 if (atomic_read(&smi_info
->stop_operation
))
974 atomic_set(&smi_info
->req_events
, 1);
977 static int initialized
;
979 static void smi_timeout(unsigned long data
)
981 struct smi_info
*smi_info
= (struct smi_info
*) data
;
982 enum si_sm_result smi_result
;
984 unsigned long jiffies_now
;
990 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
993 printk(KERN_DEBUG
"**Timer: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
995 jiffies_now
= jiffies
;
996 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
997 * SI_USEC_PER_JIFFY
);
998 smi_result
= smi_event_handler(smi_info
, time_diff
);
1000 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1002 smi_info
->last_timeout_jiffies
= jiffies_now
;
1004 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1005 /* Running with interrupts, only do long timeouts. */
1006 smi_info
->si_timer
.expires
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1007 smi_inc_stat(smi_info
, long_timeouts
);
1012 * If the state machine asks for a short delay, then shorten
1013 * the timer timeout.
1015 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1016 smi_inc_stat(smi_info
, short_timeouts
);
1017 smi_info
->si_timer
.expires
= jiffies
+ 1;
1019 smi_inc_stat(smi_info
, long_timeouts
);
1020 smi_info
->si_timer
.expires
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1024 add_timer(&(smi_info
->si_timer
));
1027 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1029 struct smi_info
*smi_info
= data
;
1030 unsigned long flags
;
1035 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1037 smi_inc_stat(smi_info
, interrupts
);
1040 do_gettimeofday(&t
);
1041 printk(KERN_DEBUG
"**Interrupt: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1043 smi_event_handler(smi_info
, 0);
1044 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1048 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1050 struct smi_info
*smi_info
= data
;
1051 /* We need to clear the IRQ flag for the BT interface. */
1052 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1053 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1054 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1055 return si_irq_handler(irq
, data
);
1058 static int smi_start_processing(void *send_info
,
1061 struct smi_info
*new_smi
= send_info
;
1064 new_smi
->intf
= intf
;
1066 /* Try to claim any interrupts. */
1067 if (new_smi
->irq_setup
)
1068 new_smi
->irq_setup(new_smi
);
1070 /* Set up the timer that drives the interface. */
1071 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1072 new_smi
->last_timeout_jiffies
= jiffies
;
1073 mod_timer(&new_smi
->si_timer
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1076 * Check if the user forcefully enabled the daemon.
1078 if (new_smi
->intf_num
< num_force_kipmid
)
1079 enable
= force_kipmid
[new_smi
->intf_num
];
1081 * The BT interface is efficient enough to not need a thread,
1082 * and there is no need for a thread if we have interrupts.
1084 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1088 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1089 "kipmi%d", new_smi
->intf_num
);
1090 if (IS_ERR(new_smi
->thread
)) {
1091 printk(KERN_NOTICE
"ipmi_si_intf: Could not start"
1092 " kernel thread due to error %ld, only using"
1093 " timers to drive the interface\n",
1094 PTR_ERR(new_smi
->thread
));
1095 new_smi
->thread
= NULL
;
1102 static void set_maintenance_mode(void *send_info
, int enable
)
1104 struct smi_info
*smi_info
= send_info
;
1107 atomic_set(&smi_info
->req_events
, 0);
1110 static struct ipmi_smi_handlers handlers
= {
1111 .owner
= THIS_MODULE
,
1112 .start_processing
= smi_start_processing
,
1114 .request_events
= request_events
,
1115 .set_maintenance_mode
= set_maintenance_mode
,
1116 .set_run_to_completion
= set_run_to_completion
,
1121 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1122 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1125 static LIST_HEAD(smi_infos
);
1126 static DEFINE_MUTEX(smi_infos_lock
);
1127 static int smi_num
; /* Used to sequence the SMIs */
1129 #define DEFAULT_REGSPACING 1
1130 #define DEFAULT_REGSIZE 1
1132 static int si_trydefaults
= 1;
1133 static char *si_type
[SI_MAX_PARMS
];
1134 #define MAX_SI_TYPE_STR 30
1135 static char si_type_str
[MAX_SI_TYPE_STR
];
1136 static unsigned long addrs
[SI_MAX_PARMS
];
1137 static unsigned int num_addrs
;
1138 static unsigned int ports
[SI_MAX_PARMS
];
1139 static unsigned int num_ports
;
1140 static int irqs
[SI_MAX_PARMS
];
1141 static unsigned int num_irqs
;
1142 static int regspacings
[SI_MAX_PARMS
];
1143 static unsigned int num_regspacings
;
1144 static int regsizes
[SI_MAX_PARMS
];
1145 static unsigned int num_regsizes
;
1146 static int regshifts
[SI_MAX_PARMS
];
1147 static unsigned int num_regshifts
;
1148 static int slave_addrs
[SI_MAX_PARMS
];
1149 static unsigned int num_slave_addrs
;
1151 #define IPMI_IO_ADDR_SPACE 0
1152 #define IPMI_MEM_ADDR_SPACE 1
1153 static char *addr_space_to_str
[] = { "i/o", "mem" };
1155 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1157 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1158 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1159 " Documentation/IPMI.txt in the kernel sources for the"
1162 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1163 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1164 " default scan of the KCS and SMIC interface at the standard"
1166 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1167 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1168 " interface separated by commas. The types are 'kcs',"
1169 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1170 " the first interface to kcs and the second to bt");
1171 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1172 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1173 " addresses separated by commas. Only use if an interface"
1174 " is in memory. Otherwise, set it to zero or leave"
1176 module_param_array(ports
, uint
, &num_ports
, 0);
1177 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1178 " addresses separated by commas. Only use if an interface"
1179 " is a port. Otherwise, set it to zero or leave"
1181 module_param_array(irqs
, int, &num_irqs
, 0);
1182 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1183 " addresses separated by commas. Only use if an interface"
1184 " has an interrupt. Otherwise, set it to zero or leave"
1186 module_param_array(regspacings
, int, &num_regspacings
, 0);
1187 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1188 " and each successive register used by the interface. For"
1189 " instance, if the start address is 0xca2 and the spacing"
1190 " is 2, then the second address is at 0xca4. Defaults"
1192 module_param_array(regsizes
, int, &num_regsizes
, 0);
1193 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1194 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1195 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1196 " the 8-bit IPMI register has to be read from a larger"
1198 module_param_array(regshifts
, int, &num_regshifts
, 0);
1199 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1200 " IPMI register, in bits. For instance, if the data"
1201 " is read from a 32-bit word and the IPMI data is in"
1202 " bit 8-15, then the shift would be 8");
1203 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1204 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1205 " the controller. Normally this is 0x20, but can be"
1206 " overridden by this parm. This is an array indexed"
1207 " by interface number.");
1208 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1209 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1210 " disabled(0). Normally the IPMI driver auto-detects"
1211 " this, but the value may be overridden by this parm.");
1212 module_param(unload_when_empty
, int, 0);
1213 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1214 " specified or found, default is 1. Setting to 0"
1215 " is useful for hot add of devices using hotmod.");
1218 static void std_irq_cleanup(struct smi_info
*info
)
1220 if (info
->si_type
== SI_BT
)
1221 /* Disable the interrupt in the BT interface. */
1222 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1223 free_irq(info
->irq
, info
);
1226 static int std_irq_setup(struct smi_info
*info
)
1233 if (info
->si_type
== SI_BT
) {
1234 rv
= request_irq(info
->irq
,
1236 IRQF_SHARED
| IRQF_DISABLED
,
1240 /* Enable the interrupt in the BT interface. */
1241 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1242 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1244 rv
= request_irq(info
->irq
,
1246 IRQF_SHARED
| IRQF_DISABLED
,
1251 "ipmi_si: %s unable to claim interrupt %d,"
1252 " running polled\n",
1253 DEVICE_NAME
, info
->irq
);
1256 info
->irq_cleanup
= std_irq_cleanup
;
1257 printk(" Using irq %d\n", info
->irq
);
1263 static unsigned char port_inb(struct si_sm_io
*io
, unsigned int offset
)
1265 unsigned int addr
= io
->addr_data
;
1267 return inb(addr
+ (offset
* io
->regspacing
));
1270 static void port_outb(struct si_sm_io
*io
, unsigned int offset
,
1273 unsigned int addr
= io
->addr_data
;
1275 outb(b
, addr
+ (offset
* io
->regspacing
));
1278 static unsigned char port_inw(struct si_sm_io
*io
, unsigned int offset
)
1280 unsigned int addr
= io
->addr_data
;
1282 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1285 static void port_outw(struct si_sm_io
*io
, unsigned int offset
,
1288 unsigned int addr
= io
->addr_data
;
1290 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1293 static unsigned char port_inl(struct si_sm_io
*io
, unsigned int offset
)
1295 unsigned int addr
= io
->addr_data
;
1297 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1300 static void port_outl(struct si_sm_io
*io
, unsigned int offset
,
1303 unsigned int addr
= io
->addr_data
;
1305 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1308 static void port_cleanup(struct smi_info
*info
)
1310 unsigned int addr
= info
->io
.addr_data
;
1314 for (idx
= 0; idx
< info
->io_size
; idx
++)
1315 release_region(addr
+ idx
* info
->io
.regspacing
,
1320 static int port_setup(struct smi_info
*info
)
1322 unsigned int addr
= info
->io
.addr_data
;
1328 info
->io_cleanup
= port_cleanup
;
1331 * Figure out the actual inb/inw/inl/etc routine to use based
1332 * upon the register size.
1334 switch (info
->io
.regsize
) {
1336 info
->io
.inputb
= port_inb
;
1337 info
->io
.outputb
= port_outb
;
1340 info
->io
.inputb
= port_inw
;
1341 info
->io
.outputb
= port_outw
;
1344 info
->io
.inputb
= port_inl
;
1345 info
->io
.outputb
= port_outl
;
1348 printk(KERN_WARNING
"ipmi_si: Invalid register size: %d\n",
1354 * Some BIOSes reserve disjoint I/O regions in their ACPI
1355 * tables. This causes problems when trying to register the
1356 * entire I/O region. Therefore we must register each I/O
1359 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1360 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1361 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1362 /* Undo allocations */
1364 release_region(addr
+ idx
* info
->io
.regspacing
,
1373 static unsigned char intf_mem_inb(struct si_sm_io
*io
, unsigned int offset
)
1375 return readb((io
->addr
)+(offset
* io
->regspacing
));
1378 static void intf_mem_outb(struct si_sm_io
*io
, unsigned int offset
,
1381 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1384 static unsigned char intf_mem_inw(struct si_sm_io
*io
, unsigned int offset
)
1386 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1390 static void intf_mem_outw(struct si_sm_io
*io
, unsigned int offset
,
1393 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1396 static unsigned char intf_mem_inl(struct si_sm_io
*io
, unsigned int offset
)
1398 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1402 static void intf_mem_outl(struct si_sm_io
*io
, unsigned int offset
,
1405 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1409 static unsigned char mem_inq(struct si_sm_io
*io
, unsigned int offset
)
1411 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1415 static void mem_outq(struct si_sm_io
*io
, unsigned int offset
,
1418 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1422 static void mem_cleanup(struct smi_info
*info
)
1424 unsigned long addr
= info
->io
.addr_data
;
1427 if (info
->io
.addr
) {
1428 iounmap(info
->io
.addr
);
1430 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1431 - (info
->io
.regspacing
- info
->io
.regsize
));
1433 release_mem_region(addr
, mapsize
);
1437 static int mem_setup(struct smi_info
*info
)
1439 unsigned long addr
= info
->io
.addr_data
;
1445 info
->io_cleanup
= mem_cleanup
;
1448 * Figure out the actual readb/readw/readl/etc routine to use based
1449 * upon the register size.
1451 switch (info
->io
.regsize
) {
1453 info
->io
.inputb
= intf_mem_inb
;
1454 info
->io
.outputb
= intf_mem_outb
;
1457 info
->io
.inputb
= intf_mem_inw
;
1458 info
->io
.outputb
= intf_mem_outw
;
1461 info
->io
.inputb
= intf_mem_inl
;
1462 info
->io
.outputb
= intf_mem_outl
;
1466 info
->io
.inputb
= mem_inq
;
1467 info
->io
.outputb
= mem_outq
;
1471 printk(KERN_WARNING
"ipmi_si: Invalid register size: %d\n",
1477 * Calculate the total amount of memory to claim. This is an
1478 * unusual looking calculation, but it avoids claiming any
1479 * more memory than it has to. It will claim everything
1480 * between the first address to the end of the last full
1483 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1484 - (info
->io
.regspacing
- info
->io
.regsize
));
1486 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1489 info
->io
.addr
= ioremap(addr
, mapsize
);
1490 if (info
->io
.addr
== NULL
) {
1491 release_mem_region(addr
, mapsize
);
1498 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1499 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1507 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1508 struct hotmod_vals
{
1512 static struct hotmod_vals hotmod_ops
[] = {
1514 { "remove", HM_REMOVE
},
1517 static struct hotmod_vals hotmod_si
[] = {
1519 { "smic", SI_SMIC
},
1523 static struct hotmod_vals hotmod_as
[] = {
1524 { "mem", IPMI_MEM_ADDR_SPACE
},
1525 { "i/o", IPMI_IO_ADDR_SPACE
},
1529 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1534 s
= strchr(*curr
, ',');
1536 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1541 for (i
= 0; hotmod_ops
[i
].name
; i
++) {
1542 if (strcmp(*curr
, v
[i
].name
) == 0) {
1549 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1553 static int check_hotmod_int_op(const char *curr
, const char *option
,
1554 const char *name
, int *val
)
1558 if (strcmp(curr
, name
) == 0) {
1560 printk(KERN_WARNING PFX
1561 "No option given for '%s'\n",
1565 *val
= simple_strtoul(option
, &n
, 0);
1566 if ((*n
!= '\0') || (*option
== '\0')) {
1567 printk(KERN_WARNING PFX
1568 "Bad option given for '%s'\n",
1577 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1579 char *str
= kstrdup(val
, GFP_KERNEL
);
1581 char *next
, *curr
, *s
, *n
, *o
;
1583 enum si_type si_type
;
1593 struct smi_info
*info
;
1598 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1601 while ((ival
>= 0) && isspace(str
[ival
])) {
1606 for (curr
= str
; curr
; curr
= next
) {
1613 next
= strchr(curr
, ':');
1619 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1624 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1629 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1633 s
= strchr(curr
, ',');
1638 addr
= simple_strtoul(curr
, &n
, 0);
1639 if ((*n
!= '\0') || (*curr
== '\0')) {
1640 printk(KERN_WARNING PFX
"Invalid hotmod address"
1647 s
= strchr(curr
, ',');
1652 o
= strchr(curr
, '=');
1657 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1662 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1667 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1672 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1677 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1684 printk(KERN_WARNING PFX
1685 "Invalid hotmod option '%s'\n",
1691 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1697 info
->addr_source
= "hotmod";
1698 info
->si_type
= si_type
;
1699 info
->io
.addr_data
= addr
;
1700 info
->io
.addr_type
= addr_space
;
1701 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1702 info
->io_setup
= mem_setup
;
1704 info
->io_setup
= port_setup
;
1706 info
->io
.addr
= NULL
;
1707 info
->io
.regspacing
= regspacing
;
1708 if (!info
->io
.regspacing
)
1709 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1710 info
->io
.regsize
= regsize
;
1711 if (!info
->io
.regsize
)
1712 info
->io
.regsize
= DEFAULT_REGSPACING
;
1713 info
->io
.regshift
= regshift
;
1716 info
->irq_setup
= std_irq_setup
;
1717 info
->slave_addr
= ipmb
;
1722 struct smi_info
*e
, *tmp_e
;
1724 mutex_lock(&smi_infos_lock
);
1725 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1726 if (e
->io
.addr_type
!= addr_space
)
1728 if (e
->si_type
!= si_type
)
1730 if (e
->io
.addr_data
== addr
)
1733 mutex_unlock(&smi_infos_lock
);
1742 static __devinit
void hardcode_find_bmc(void)
1745 struct smi_info
*info
;
1747 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1748 if (!ports
[i
] && !addrs
[i
])
1751 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1755 info
->addr_source
= "hardcoded";
1757 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1758 info
->si_type
= SI_KCS
;
1759 } else if (strcmp(si_type
[i
], "smic") == 0) {
1760 info
->si_type
= SI_SMIC
;
1761 } else if (strcmp(si_type
[i
], "bt") == 0) {
1762 info
->si_type
= SI_BT
;
1765 "ipmi_si: Interface type specified "
1766 "for interface %d, was invalid: %s\n",
1774 info
->io_setup
= port_setup
;
1775 info
->io
.addr_data
= ports
[i
];
1776 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1777 } else if (addrs
[i
]) {
1779 info
->io_setup
= mem_setup
;
1780 info
->io
.addr_data
= addrs
[i
];
1781 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1784 "ipmi_si: Interface type specified "
1785 "for interface %d, "
1786 "but port and address were not set or "
1787 "set to zero.\n", i
);
1792 info
->io
.addr
= NULL
;
1793 info
->io
.regspacing
= regspacings
[i
];
1794 if (!info
->io
.regspacing
)
1795 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1796 info
->io
.regsize
= regsizes
[i
];
1797 if (!info
->io
.regsize
)
1798 info
->io
.regsize
= DEFAULT_REGSPACING
;
1799 info
->io
.regshift
= regshifts
[i
];
1800 info
->irq
= irqs
[i
];
1802 info
->irq_setup
= std_irq_setup
;
1810 #include <linux/acpi.h>
1813 * Once we get an ACPI failure, we don't try any more, because we go
1814 * through the tables sequentially. Once we don't find a table, there
1817 static int acpi_failure
;
1819 /* For GPE-type interrupts. */
1820 static u32
ipmi_acpi_gpe(void *context
)
1822 struct smi_info
*smi_info
= context
;
1823 unsigned long flags
;
1828 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1830 smi_inc_stat(smi_info
, interrupts
);
1833 do_gettimeofday(&t
);
1834 printk("**ACPI_GPE: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1836 smi_event_handler(smi_info
, 0);
1837 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1839 return ACPI_INTERRUPT_HANDLED
;
1842 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
1847 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
1850 static int acpi_gpe_irq_setup(struct smi_info
*info
)
1857 /* FIXME - is level triggered right? */
1858 status
= acpi_install_gpe_handler(NULL
,
1860 ACPI_GPE_LEVEL_TRIGGERED
,
1863 if (status
!= AE_OK
) {
1865 "ipmi_si: %s unable to claim ACPI GPE %d,"
1866 " running polled\n",
1867 DEVICE_NAME
, info
->irq
);
1871 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
1872 printk(" Using ACPI GPE %d\n", info
->irq
);
1879 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/
1880 * Docs/TechPapers/IA64/hpspmi.pdf
1891 s8 CreatorRevision
[4];
1894 s16 SpecificationRevision
;
1897 * Bit 0 - SCI interrupt supported
1898 * Bit 1 - I/O APIC/SAPIC
1903 * If bit 0 of InterruptType is set, then this is the SCI
1904 * interrupt in the GPEx_STS register.
1911 * If bit 1 of InterruptType is set, then this is the I/O
1912 * APIC/SAPIC interrupt.
1914 u32 GlobalSystemInterrupt
;
1916 /* The actual register address. */
1917 struct acpi_generic_address addr
;
1921 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
1924 static __devinit
int try_init_acpi(struct SPMITable
*spmi
)
1926 struct smi_info
*info
;
1929 if (spmi
->IPMIlegacy
!= 1) {
1930 printk(KERN_INFO
"IPMI: Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
1934 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
1935 addr_space
= IPMI_MEM_ADDR_SPACE
;
1937 addr_space
= IPMI_IO_ADDR_SPACE
;
1939 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1941 printk(KERN_ERR
"ipmi_si: Could not allocate SI data (3)\n");
1945 info
->addr_source
= "ACPI";
1947 /* Figure out the interface type. */
1948 switch (spmi
->InterfaceType
) {
1950 info
->si_type
= SI_KCS
;
1953 info
->si_type
= SI_SMIC
;
1956 info
->si_type
= SI_BT
;
1959 printk(KERN_INFO
"ipmi_si: Unknown ACPI/SPMI SI type %d\n",
1960 spmi
->InterfaceType
);
1965 if (spmi
->InterruptType
& 1) {
1966 /* We've got a GPE interrupt. */
1967 info
->irq
= spmi
->GPE
;
1968 info
->irq_setup
= acpi_gpe_irq_setup
;
1969 } else if (spmi
->InterruptType
& 2) {
1970 /* We've got an APIC/SAPIC interrupt. */
1971 info
->irq
= spmi
->GlobalSystemInterrupt
;
1972 info
->irq_setup
= std_irq_setup
;
1974 /* Use the default interrupt setting. */
1976 info
->irq_setup
= NULL
;
1979 if (spmi
->addr
.bit_width
) {
1980 /* A (hopefully) properly formed register bit width. */
1981 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
1983 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1985 info
->io
.regsize
= info
->io
.regspacing
;
1986 info
->io
.regshift
= spmi
->addr
.bit_offset
;
1988 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
1989 info
->io_setup
= mem_setup
;
1990 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1991 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
1992 info
->io_setup
= port_setup
;
1993 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1997 "ipmi_si: Unknown ACPI I/O Address type\n");
2000 info
->io
.addr_data
= spmi
->addr
.address
;
2007 static __devinit
void acpi_find_bmc(void)
2010 struct SPMITable
*spmi
;
2019 for (i
= 0; ; i
++) {
2020 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2021 (struct acpi_table_header
**)&spmi
);
2022 if (status
!= AE_OK
)
2025 try_init_acpi(spmi
);
2031 struct dmi_ipmi_data
{
2034 unsigned long base_addr
;
2040 static int __devinit
decode_dmi(const struct dmi_header
*dm
,
2041 struct dmi_ipmi_data
*dmi
)
2043 const u8
*data
= (const u8
*)dm
;
2044 unsigned long base_addr
;
2046 u8 len
= dm
->length
;
2048 dmi
->type
= data
[4];
2050 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2052 if (base_addr
& 1) {
2054 base_addr
&= 0xFFFE;
2055 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2058 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2060 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2062 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2064 dmi
->irq
= data
[0x11];
2066 /* The top two bits of byte 0x10 hold the register spacing. */
2067 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2068 switch (reg_spacing
) {
2069 case 0x00: /* Byte boundaries */
2072 case 0x01: /* 32-bit boundaries */
2075 case 0x02: /* 16-byte boundaries */
2079 /* Some other interface, just ignore it. */
2085 * Note that technically, the lower bit of the base
2086 * address should be 1 if the address is I/O and 0 if
2087 * the address is in memory. So many systems get that
2088 * wrong (and all that I have seen are I/O) so we just
2089 * ignore that bit and assume I/O. Systems that use
2090 * memory should use the newer spec, anyway.
2092 dmi
->base_addr
= base_addr
& 0xfffe;
2093 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2097 dmi
->slave_addr
= data
[6];
2102 static __devinit
void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2104 struct smi_info
*info
;
2106 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2109 "ipmi_si: Could not allocate SI data\n");
2113 info
->addr_source
= "SMBIOS";
2115 switch (ipmi_data
->type
) {
2116 case 0x01: /* KCS */
2117 info
->si_type
= SI_KCS
;
2119 case 0x02: /* SMIC */
2120 info
->si_type
= SI_SMIC
;
2123 info
->si_type
= SI_BT
;
2130 switch (ipmi_data
->addr_space
) {
2131 case IPMI_MEM_ADDR_SPACE
:
2132 info
->io_setup
= mem_setup
;
2133 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2136 case IPMI_IO_ADDR_SPACE
:
2137 info
->io_setup
= port_setup
;
2138 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2144 "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n",
2145 ipmi_data
->addr_space
);
2148 info
->io
.addr_data
= ipmi_data
->base_addr
;
2150 info
->io
.regspacing
= ipmi_data
->offset
;
2151 if (!info
->io
.regspacing
)
2152 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2153 info
->io
.regsize
= DEFAULT_REGSPACING
;
2154 info
->io
.regshift
= 0;
2156 info
->slave_addr
= ipmi_data
->slave_addr
;
2158 info
->irq
= ipmi_data
->irq
;
2160 info
->irq_setup
= std_irq_setup
;
2165 static void __devinit
dmi_find_bmc(void)
2167 const struct dmi_device
*dev
= NULL
;
2168 struct dmi_ipmi_data data
;
2171 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2172 memset(&data
, 0, sizeof(data
));
2173 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2176 try_init_dmi(&data
);
2179 #endif /* CONFIG_DMI */
2183 #define PCI_ERMC_CLASSCODE 0x0C0700
2184 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2185 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2186 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2187 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2188 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2190 #define PCI_HP_VENDOR_ID 0x103C
2191 #define PCI_MMC_DEVICE_ID 0x121A
2192 #define PCI_MMC_ADDR_CW 0x10
2194 static void ipmi_pci_cleanup(struct smi_info
*info
)
2196 struct pci_dev
*pdev
= info
->addr_source_data
;
2198 pci_disable_device(pdev
);
2201 static int __devinit
ipmi_pci_probe(struct pci_dev
*pdev
,
2202 const struct pci_device_id
*ent
)
2205 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2206 struct smi_info
*info
;
2207 int first_reg_offset
= 0;
2209 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2213 info
->addr_source
= "PCI";
2215 switch (class_type
) {
2216 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2217 info
->si_type
= SI_SMIC
;
2220 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2221 info
->si_type
= SI_KCS
;
2224 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2225 info
->si_type
= SI_BT
;
2230 printk(KERN_INFO
"ipmi_si: %s: Unknown IPMI type: %d\n",
2231 pci_name(pdev
), class_type
);
2235 rv
= pci_enable_device(pdev
);
2237 printk(KERN_ERR
"ipmi_si: %s: couldn't enable PCI device\n",
2243 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2244 info
->addr_source_data
= pdev
;
2246 if (pdev
->subsystem_vendor
== PCI_HP_VENDOR_ID
)
2247 first_reg_offset
= 1;
2249 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2250 info
->io_setup
= port_setup
;
2251 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2253 info
->io_setup
= mem_setup
;
2254 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2256 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2258 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2259 info
->io
.regsize
= DEFAULT_REGSPACING
;
2260 info
->io
.regshift
= 0;
2262 info
->irq
= pdev
->irq
;
2264 info
->irq_setup
= std_irq_setup
;
2266 info
->dev
= &pdev
->dev
;
2267 pci_set_drvdata(pdev
, info
);
2269 return try_smi_init(info
);
2272 static void __devexit
ipmi_pci_remove(struct pci_dev
*pdev
)
2274 struct smi_info
*info
= pci_get_drvdata(pdev
);
2275 cleanup_one_si(info
);
2279 static int ipmi_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2284 static int ipmi_pci_resume(struct pci_dev
*pdev
)
2290 static struct pci_device_id ipmi_pci_devices
[] = {
2291 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2292 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2295 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2297 static struct pci_driver ipmi_pci_driver
= {
2298 .name
= DEVICE_NAME
,
2299 .id_table
= ipmi_pci_devices
,
2300 .probe
= ipmi_pci_probe
,
2301 .remove
= __devexit_p(ipmi_pci_remove
),
2303 .suspend
= ipmi_pci_suspend
,
2304 .resume
= ipmi_pci_resume
,
2307 #endif /* CONFIG_PCI */
2310 #ifdef CONFIG_PPC_OF
2311 static int __devinit
ipmi_of_probe(struct of_device
*dev
,
2312 const struct of_device_id
*match
)
2314 struct smi_info
*info
;
2315 struct resource resource
;
2316 const int *regsize
, *regspacing
, *regshift
;
2317 struct device_node
*np
= dev
->node
;
2321 dev_info(&dev
->dev
, PFX
"probing via device tree\n");
2323 ret
= of_address_to_resource(np
, 0, &resource
);
2325 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2329 regsize
= of_get_property(np
, "reg-size", &proplen
);
2330 if (regsize
&& proplen
!= 4) {
2331 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2335 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2336 if (regspacing
&& proplen
!= 4) {
2337 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2341 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2342 if (regshift
&& proplen
!= 4) {
2343 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2347 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2351 PFX
"could not allocate memory for OF probe\n");
2355 info
->si_type
= (enum si_type
) match
->data
;
2356 info
->addr_source
= "device-tree";
2357 info
->irq_setup
= std_irq_setup
;
2359 if (resource
.flags
& IORESOURCE_IO
) {
2360 info
->io_setup
= port_setup
;
2361 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2363 info
->io_setup
= mem_setup
;
2364 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2367 info
->io
.addr_data
= resource
.start
;
2369 info
->io
.regsize
= regsize
? *regsize
: DEFAULT_REGSIZE
;
2370 info
->io
.regspacing
= regspacing
? *regspacing
: DEFAULT_REGSPACING
;
2371 info
->io
.regshift
= regshift
? *regshift
: 0;
2373 info
->irq
= irq_of_parse_and_map(dev
->node
, 0);
2374 info
->dev
= &dev
->dev
;
2376 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %x\n",
2377 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2380 dev
->dev
.driver_data
= (void *) info
;
2382 return try_smi_init(info
);
2385 static int __devexit
ipmi_of_remove(struct of_device
*dev
)
2387 cleanup_one_si(dev
->dev
.driver_data
);
2391 static struct of_device_id ipmi_match
[] =
2393 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2394 .data
= (void *)(unsigned long) SI_KCS
},
2395 { .type
= "ipmi", .compatible
= "ipmi-smic",
2396 .data
= (void *)(unsigned long) SI_SMIC
},
2397 { .type
= "ipmi", .compatible
= "ipmi-bt",
2398 .data
= (void *)(unsigned long) SI_BT
},
2402 static struct of_platform_driver ipmi_of_platform_driver
= {
2404 .match_table
= ipmi_match
,
2405 .probe
= ipmi_of_probe
,
2406 .remove
= __devexit_p(ipmi_of_remove
),
2408 #endif /* CONFIG_PPC_OF */
2411 static int try_get_dev_id(struct smi_info
*smi_info
)
2413 unsigned char msg
[2];
2414 unsigned char *resp
;
2415 unsigned long resp_len
;
2416 enum si_sm_result smi_result
;
2419 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2424 * Do a Get Device ID command, since it comes back with some
2427 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2428 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2429 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2431 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2433 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2434 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2435 schedule_timeout_uninterruptible(1);
2436 smi_result
= smi_info
->handlers
->event(
2437 smi_info
->si_sm
, 100);
2438 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2439 smi_result
= smi_info
->handlers
->event(
2440 smi_info
->si_sm
, 0);
2444 if (smi_result
== SI_SM_HOSED
) {
2446 * We couldn't get the state machine to run, so whatever's at
2447 * the port is probably not an IPMI SMI interface.
2453 /* Otherwise, we got some data. */
2454 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2455 resp
, IPMI_MAX_MSG_LENGTH
);
2457 /* Check and record info from the get device id, in case we need it. */
2458 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2465 static int type_file_read_proc(char *page
, char **start
, off_t off
,
2466 int count
, int *eof
, void *data
)
2468 struct smi_info
*smi
= data
;
2470 return sprintf(page
, "%s\n", si_to_str
[smi
->si_type
]);
2473 static int stat_file_read_proc(char *page
, char **start
, off_t off
,
2474 int count
, int *eof
, void *data
)
2476 char *out
= (char *) page
;
2477 struct smi_info
*smi
= data
;
2479 out
+= sprintf(out
, "interrupts_enabled: %d\n",
2480 smi
->irq
&& !smi
->interrupt_disabled
);
2481 out
+= sprintf(out
, "short_timeouts: %u\n",
2482 smi_get_stat(smi
, short_timeouts
));
2483 out
+= sprintf(out
, "long_timeouts: %u\n",
2484 smi_get_stat(smi
, long_timeouts
));
2485 out
+= sprintf(out
, "idles: %u\n",
2486 smi_get_stat(smi
, idles
));
2487 out
+= sprintf(out
, "interrupts: %u\n",
2488 smi_get_stat(smi
, interrupts
));
2489 out
+= sprintf(out
, "attentions: %u\n",
2490 smi_get_stat(smi
, attentions
));
2491 out
+= sprintf(out
, "flag_fetches: %u\n",
2492 smi_get_stat(smi
, flag_fetches
));
2493 out
+= sprintf(out
, "hosed_count: %u\n",
2494 smi_get_stat(smi
, hosed_count
));
2495 out
+= sprintf(out
, "complete_transactions: %u\n",
2496 smi_get_stat(smi
, complete_transactions
));
2497 out
+= sprintf(out
, "events: %u\n",
2498 smi_get_stat(smi
, events
));
2499 out
+= sprintf(out
, "watchdog_pretimeouts: %u\n",
2500 smi_get_stat(smi
, watchdog_pretimeouts
));
2501 out
+= sprintf(out
, "incoming_messages: %u\n",
2502 smi_get_stat(smi
, incoming_messages
));
2507 static int param_read_proc(char *page
, char **start
, off_t off
,
2508 int count
, int *eof
, void *data
)
2510 struct smi_info
*smi
= data
;
2512 return sprintf(page
,
2513 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2514 si_to_str
[smi
->si_type
],
2515 addr_space_to_str
[smi
->io
.addr_type
],
2525 * oem_data_avail_to_receive_msg_avail
2526 * @info - smi_info structure with msg_flags set
2528 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2529 * Returns 1 indicating need to re-run handle_flags().
2531 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
2533 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
2539 * setup_dell_poweredge_oem_data_handler
2540 * @info - smi_info.device_id must be populated
2542 * Systems that match, but have firmware version < 1.40 may assert
2543 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2544 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2545 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2546 * as RECEIVE_MSG_AVAIL instead.
2548 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2549 * assert the OEM[012] bits, and if it did, the driver would have to
2550 * change to handle that properly, we don't actually check for the
2552 * Device ID = 0x20 BMC on PowerEdge 8G servers
2553 * Device Revision = 0x80
2554 * Firmware Revision1 = 0x01 BMC version 1.40
2555 * Firmware Revision2 = 0x40 BCD encoded
2556 * IPMI Version = 0x51 IPMI 1.5
2557 * Manufacturer ID = A2 02 00 Dell IANA
2559 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2560 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2563 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2564 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2565 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2566 #define DELL_IANA_MFR_ID 0x0002a2
2567 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
2569 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2570 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
2571 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
2572 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
2573 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
2574 smi_info
->oem_data_avail_handler
=
2575 oem_data_avail_to_receive_msg_avail
;
2576 } else if (ipmi_version_major(id
) < 1 ||
2577 (ipmi_version_major(id
) == 1 &&
2578 ipmi_version_minor(id
) < 5)) {
2579 smi_info
->oem_data_avail_handler
=
2580 oem_data_avail_to_receive_msg_avail
;
2585 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2586 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
2588 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
2590 /* Make it a reponse */
2591 msg
->rsp
[0] = msg
->data
[0] | 4;
2592 msg
->rsp
[1] = msg
->data
[1];
2593 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
2595 smi_info
->curr_msg
= NULL
;
2596 deliver_recv_msg(smi_info
, msg
);
2600 * dell_poweredge_bt_xaction_handler
2601 * @info - smi_info.device_id must be populated
2603 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2604 * not respond to a Get SDR command if the length of the data
2605 * requested is exactly 0x3A, which leads to command timeouts and no
2606 * data returned. This intercepts such commands, and causes userspace
2607 * callers to try again with a different-sized buffer, which succeeds.
2610 #define STORAGE_NETFN 0x0A
2611 #define STORAGE_CMD_GET_SDR 0x23
2612 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
2613 unsigned long unused
,
2616 struct smi_info
*smi_info
= in
;
2617 unsigned char *data
= smi_info
->curr_msg
->data
;
2618 unsigned int size
= smi_info
->curr_msg
->data_size
;
2620 (data
[0]>>2) == STORAGE_NETFN
&&
2621 data
[1] == STORAGE_CMD_GET_SDR
&&
2623 return_hosed_msg_badsize(smi_info
);
2629 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
2630 .notifier_call
= dell_poweredge_bt_xaction_handler
,
2634 * setup_dell_poweredge_bt_xaction_handler
2635 * @info - smi_info.device_id must be filled in already
2637 * Fills in smi_info.device_id.start_transaction_pre_hook
2638 * when we know what function to use there.
2641 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
2643 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2644 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
2645 smi_info
->si_type
== SI_BT
)
2646 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
2650 * setup_oem_data_handler
2651 * @info - smi_info.device_id must be filled in already
2653 * Fills in smi_info.device_id.oem_data_available_handler
2654 * when we know what function to use there.
2657 static void setup_oem_data_handler(struct smi_info
*smi_info
)
2659 setup_dell_poweredge_oem_data_handler(smi_info
);
2662 static void setup_xaction_handlers(struct smi_info
*smi_info
)
2664 setup_dell_poweredge_bt_xaction_handler(smi_info
);
2667 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
2669 if (smi_info
->intf
) {
2671 * The timer and thread are only running if the
2672 * interface has been started up and registered.
2674 if (smi_info
->thread
!= NULL
)
2675 kthread_stop(smi_info
->thread
);
2676 del_timer_sync(&smi_info
->si_timer
);
2680 static __devinitdata
struct ipmi_default_vals
2686 { .type
= SI_KCS
, .port
= 0xca2 },
2687 { .type
= SI_SMIC
, .port
= 0xca9 },
2688 { .type
= SI_BT
, .port
= 0xe4 },
2692 static __devinit
void default_find_bmc(void)
2694 struct smi_info
*info
;
2697 for (i
= 0; ; i
++) {
2698 if (!ipmi_defaults
[i
].port
)
2701 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
2704 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2708 info
->addr_source
= NULL
;
2710 info
->si_type
= ipmi_defaults
[i
].type
;
2711 info
->io_setup
= port_setup
;
2712 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
2713 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2715 info
->io
.addr
= NULL
;
2716 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2717 info
->io
.regsize
= DEFAULT_REGSPACING
;
2718 info
->io
.regshift
= 0;
2720 if (try_smi_init(info
) == 0) {
2722 printk(KERN_INFO
"ipmi_si: Found default %s state"
2723 " machine at %s address 0x%lx\n",
2724 si_to_str
[info
->si_type
],
2725 addr_space_to_str
[info
->io
.addr_type
],
2726 info
->io
.addr_data
);
2732 static int is_new_interface(struct smi_info
*info
)
2736 list_for_each_entry(e
, &smi_infos
, link
) {
2737 if (e
->io
.addr_type
!= info
->io
.addr_type
)
2739 if (e
->io
.addr_data
== info
->io
.addr_data
)
2746 static int try_smi_init(struct smi_info
*new_smi
)
2751 if (new_smi
->addr_source
) {
2752 printk(KERN_INFO
"ipmi_si: Trying %s-specified %s state"
2753 " machine at %s address 0x%lx, slave address 0x%x,"
2755 new_smi
->addr_source
,
2756 si_to_str
[new_smi
->si_type
],
2757 addr_space_to_str
[new_smi
->io
.addr_type
],
2758 new_smi
->io
.addr_data
,
2759 new_smi
->slave_addr
, new_smi
->irq
);
2762 mutex_lock(&smi_infos_lock
);
2763 if (!is_new_interface(new_smi
)) {
2764 printk(KERN_WARNING
"ipmi_si: duplicate interface\n");
2769 /* So we know not to free it unless we have allocated one. */
2770 new_smi
->intf
= NULL
;
2771 new_smi
->si_sm
= NULL
;
2772 new_smi
->handlers
= NULL
;
2774 switch (new_smi
->si_type
) {
2776 new_smi
->handlers
= &kcs_smi_handlers
;
2780 new_smi
->handlers
= &smic_smi_handlers
;
2784 new_smi
->handlers
= &bt_smi_handlers
;
2788 /* No support for anything else yet. */
2793 /* Allocate the state machine's data and initialize it. */
2794 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
2795 if (!new_smi
->si_sm
) {
2796 printk(KERN_ERR
"Could not allocate state machine memory\n");
2800 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
2803 /* Now that we know the I/O size, we can set up the I/O. */
2804 rv
= new_smi
->io_setup(new_smi
);
2806 printk(KERN_ERR
"Could not set up I/O space\n");
2810 spin_lock_init(&(new_smi
->si_lock
));
2811 spin_lock_init(&(new_smi
->msg_lock
));
2813 /* Do low-level detection first. */
2814 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
2815 if (new_smi
->addr_source
)
2816 printk(KERN_INFO
"ipmi_si: Interface detection"
2823 * Attempt a get device id command. If it fails, we probably
2824 * don't have a BMC here.
2826 rv
= try_get_dev_id(new_smi
);
2828 if (new_smi
->addr_source
)
2829 printk(KERN_INFO
"ipmi_si: There appears to be no BMC"
2830 " at this location\n");
2834 setup_oem_data_handler(new_smi
);
2835 setup_xaction_handlers(new_smi
);
2837 INIT_LIST_HEAD(&(new_smi
->xmit_msgs
));
2838 INIT_LIST_HEAD(&(new_smi
->hp_xmit_msgs
));
2839 new_smi
->curr_msg
= NULL
;
2840 atomic_set(&new_smi
->req_events
, 0);
2841 new_smi
->run_to_completion
= 0;
2842 for (i
= 0; i
< SI_NUM_STATS
; i
++)
2843 atomic_set(&new_smi
->stats
[i
], 0);
2845 new_smi
->interrupt_disabled
= 0;
2846 atomic_set(&new_smi
->stop_operation
, 0);
2847 new_smi
->intf_num
= smi_num
;
2851 * Start clearing the flags before we enable interrupts or the
2852 * timer to avoid racing with the timer.
2854 start_clear_flags(new_smi
);
2855 /* IRQ is defined to be set when non-zero. */
2857 new_smi
->si_state
= SI_CLEARING_FLAGS_THEN_SET_IRQ
;
2859 if (!new_smi
->dev
) {
2861 * If we don't already have a device from something
2862 * else (like PCI), then register a new one.
2864 new_smi
->pdev
= platform_device_alloc("ipmi_si",
2869 " Unable to allocate platform device\n");
2872 new_smi
->dev
= &new_smi
->pdev
->dev
;
2873 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
2875 rv
= platform_device_add(new_smi
->pdev
);
2879 " Unable to register system interface device:"
2884 new_smi
->dev_registered
= 1;
2887 rv
= ipmi_register_smi(&handlers
,
2889 &new_smi
->device_id
,
2892 new_smi
->slave_addr
);
2895 "ipmi_si: Unable to register device: error %d\n",
2897 goto out_err_stop_timer
;
2900 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
2901 type_file_read_proc
,
2905 "ipmi_si: Unable to create proc entry: %d\n",
2907 goto out_err_stop_timer
;
2910 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
2911 stat_file_read_proc
,
2915 "ipmi_si: Unable to create proc entry: %d\n",
2917 goto out_err_stop_timer
;
2920 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
2925 "ipmi_si: Unable to create proc entry: %d\n",
2927 goto out_err_stop_timer
;
2930 list_add_tail(&new_smi
->link
, &smi_infos
);
2932 mutex_unlock(&smi_infos_lock
);
2934 printk(KERN_INFO
"IPMI %s interface initialized\n",
2935 si_to_str
[new_smi
->si_type
]);
2940 atomic_inc(&new_smi
->stop_operation
);
2941 wait_for_timer_and_thread(new_smi
);
2945 ipmi_unregister_smi(new_smi
->intf
);
2947 if (new_smi
->irq_cleanup
)
2948 new_smi
->irq_cleanup(new_smi
);
2951 * Wait until we know that we are out of any interrupt
2952 * handlers might have been running before we freed the
2955 synchronize_sched();
2957 if (new_smi
->si_sm
) {
2958 if (new_smi
->handlers
)
2959 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
2960 kfree(new_smi
->si_sm
);
2962 if (new_smi
->addr_source_cleanup
)
2963 new_smi
->addr_source_cleanup(new_smi
);
2964 if (new_smi
->io_cleanup
)
2965 new_smi
->io_cleanup(new_smi
);
2967 if (new_smi
->dev_registered
)
2968 platform_device_unregister(new_smi
->pdev
);
2972 mutex_unlock(&smi_infos_lock
);
2977 static __devinit
int init_ipmi_si(void)
2987 /* Register the device drivers. */
2988 rv
= driver_register(&ipmi_driver
.driver
);
2991 "init_ipmi_si: Unable to register driver: %d\n",
2997 /* Parse out the si_type string into its components. */
3000 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3002 str
= strchr(str
, ',');
3012 printk(KERN_INFO
"IPMI System Interface driver.\n");
3014 hardcode_find_bmc();
3025 rv
= pci_register_driver(&ipmi_pci_driver
);
3028 "init_ipmi_si: Unable to register PCI driver: %d\n",
3032 #ifdef CONFIG_PPC_OF
3033 of_register_platform_driver(&ipmi_of_platform_driver
);
3036 if (si_trydefaults
) {
3037 mutex_lock(&smi_infos_lock
);
3038 if (list_empty(&smi_infos
)) {
3039 /* No BMC was found, try defaults. */
3040 mutex_unlock(&smi_infos_lock
);
3043 mutex_unlock(&smi_infos_lock
);
3047 mutex_lock(&smi_infos_lock
);
3048 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3049 mutex_unlock(&smi_infos_lock
);
3051 pci_unregister_driver(&ipmi_pci_driver
);
3054 #ifdef CONFIG_PPC_OF
3055 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3057 driver_unregister(&ipmi_driver
.driver
);
3059 "ipmi_si: Unable to find any System Interface(s)\n");
3062 mutex_unlock(&smi_infos_lock
);
3066 module_init(init_ipmi_si
);
3068 static void cleanup_one_si(struct smi_info
*to_clean
)
3071 unsigned long flags
;
3076 list_del(&to_clean
->link
);
3078 /* Tell the driver that we are shutting down. */
3079 atomic_inc(&to_clean
->stop_operation
);
3082 * Make sure the timer and thread are stopped and will not run
3085 wait_for_timer_and_thread(to_clean
);
3088 * Timeouts are stopped, now make sure the interrupts are off
3089 * for the device. A little tricky with locks to make sure
3090 * there are no races.
3092 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3093 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3094 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3096 schedule_timeout_uninterruptible(1);
3097 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3099 disable_si_irq(to_clean
);
3100 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3101 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3103 schedule_timeout_uninterruptible(1);
3106 /* Clean up interrupts and make sure that everything is done. */
3107 if (to_clean
->irq_cleanup
)
3108 to_clean
->irq_cleanup(to_clean
);
3109 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3111 schedule_timeout_uninterruptible(1);
3114 rv
= ipmi_unregister_smi(to_clean
->intf
);
3117 "ipmi_si: Unable to unregister device: errno=%d\n",
3121 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3123 kfree(to_clean
->si_sm
);
3125 if (to_clean
->addr_source_cleanup
)
3126 to_clean
->addr_source_cleanup(to_clean
);
3127 if (to_clean
->io_cleanup
)
3128 to_clean
->io_cleanup(to_clean
);
3130 if (to_clean
->dev_registered
)
3131 platform_device_unregister(to_clean
->pdev
);
3136 static __exit
void cleanup_ipmi_si(void)
3138 struct smi_info
*e
, *tmp_e
;
3144 pci_unregister_driver(&ipmi_pci_driver
);
3147 #ifdef CONFIG_PPC_OF
3148 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3151 mutex_lock(&smi_infos_lock
);
3152 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3154 mutex_unlock(&smi_infos_lock
);
3156 driver_unregister(&ipmi_driver
.driver
);
3158 module_exit(cleanup_ipmi_si
);
3160 MODULE_LICENSE("GPL");
3161 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3162 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3163 " system interfaces.");