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>
67 #include <linux/pnp.h>
70 #include <linux/of_device.h>
71 #include <linux/of_platform.h>
74 #define PFX "ipmi_si: "
76 /* Measure times between events in the driver. */
79 /* Call every 10 ms. */
80 #define SI_TIMEOUT_TIME_USEC 10000
81 #define SI_USEC_PER_JIFFY (1000000/HZ)
82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
91 SI_CLEARING_FLAGS_THEN_SET_IRQ
,
93 SI_ENABLE_INTERRUPTS1
,
94 SI_ENABLE_INTERRUPTS2
,
95 SI_DISABLE_INTERRUPTS1
,
96 SI_DISABLE_INTERRUPTS2
97 /* FIXME - add watchdog stuff. */
100 /* Some BT-specific defines we need here. */
101 #define IPMI_BT_INTMASK_REG 2
102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106 SI_KCS
, SI_SMIC
, SI_BT
108 static char *si_to_str
[] = { "kcs", "smic", "bt" };
111 SI_INVALID
= 0, SI_HOTMOD
, SI_HARDCODED
, SI_SPMI
, SI_ACPI
, SI_SMBIOS
,
112 SI_PCI
, SI_DEVICETREE
, SI_DEFAULT
114 static char *ipmi_addr_src_to_str
[] = { NULL
, "hotmod", "hardcoded", "SPMI",
115 "ACPI", "SMBIOS", "PCI",
116 "device-tree", "default" };
118 #define DEVICE_NAME "ipmi_si"
120 static struct platform_driver ipmi_driver
= {
123 .bus
= &platform_bus_type
129 * Indexes into stats[] in smi_info below.
131 enum si_stat_indexes
{
133 * Number of times the driver requested a timer while an operation
136 SI_STAT_short_timeouts
= 0,
139 * Number of times the driver requested a timer while nothing was in
142 SI_STAT_long_timeouts
,
144 /* Number of times the interface was idle while being polled. */
147 /* Number of interrupts the driver handled. */
150 /* Number of time the driver got an ATTN from the hardware. */
153 /* Number of times the driver requested flags from the hardware. */
154 SI_STAT_flag_fetches
,
156 /* Number of times the hardware didn't follow the state machine. */
159 /* Number of completed messages. */
160 SI_STAT_complete_transactions
,
162 /* Number of IPMI events received from the hardware. */
165 /* Number of watchdog pretimeouts. */
166 SI_STAT_watchdog_pretimeouts
,
168 /* Number of asyncronous messages received. */
169 SI_STAT_incoming_messages
,
172 /* This *must* remain last, add new values above this. */
179 struct si_sm_data
*si_sm
;
180 struct si_sm_handlers
*handlers
;
181 enum si_type si_type
;
184 struct list_head xmit_msgs
;
185 struct list_head hp_xmit_msgs
;
186 struct ipmi_smi_msg
*curr_msg
;
187 enum si_intf_state si_state
;
190 * Used to handle the various types of I/O that can occur with
194 int (*io_setup
)(struct smi_info
*info
);
195 void (*io_cleanup
)(struct smi_info
*info
);
196 int (*irq_setup
)(struct smi_info
*info
);
197 void (*irq_cleanup
)(struct smi_info
*info
);
198 unsigned int io_size
;
199 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
200 void (*addr_source_cleanup
)(struct smi_info
*info
);
201 void *addr_source_data
;
204 * Per-OEM handler, called from handle_flags(). Returns 1
205 * when handle_flags() needs to be re-run or 0 indicating it
206 * set si_state itself.
208 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
211 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
212 * is set to hold the flags until we are done handling everything
215 #define RECEIVE_MSG_AVAIL 0x01
216 #define EVENT_MSG_BUFFER_FULL 0x02
217 #define WDT_PRE_TIMEOUT_INT 0x08
218 #define OEM0_DATA_AVAIL 0x20
219 #define OEM1_DATA_AVAIL 0x40
220 #define OEM2_DATA_AVAIL 0x80
221 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
224 unsigned char msg_flags
;
226 /* Does the BMC have an event buffer? */
227 char has_event_buffer
;
230 * If set to true, this will request events the next time the
231 * state machine is idle.
236 * If true, run the state machine to completion on every send
237 * call. Generally used after a panic to make sure stuff goes
240 int run_to_completion
;
242 /* The I/O port of an SI interface. */
246 * The space between start addresses of the two ports. For
247 * instance, if the first port is 0xca2 and the spacing is 4, then
248 * the second port is 0xca6.
250 unsigned int spacing
;
252 /* zero if no irq; */
255 /* The timer for this si. */
256 struct timer_list si_timer
;
258 /* The time (in jiffies) the last timeout occurred at. */
259 unsigned long last_timeout_jiffies
;
261 /* Used to gracefully stop the timer without race conditions. */
262 atomic_t stop_operation
;
265 * The driver will disable interrupts when it gets into a
266 * situation where it cannot handle messages due to lack of
267 * memory. Once that situation clears up, it will re-enable
270 int interrupt_disabled
;
272 /* From the get device id response... */
273 struct ipmi_device_id device_id
;
275 /* Driver model stuff. */
277 struct platform_device
*pdev
;
280 * True if we allocated the device, false if it came from
281 * someplace else (like PCI).
285 /* Slave address, could be reported from DMI. */
286 unsigned char slave_addr
;
288 /* Counters and things for the proc filesystem. */
289 atomic_t stats
[SI_NUM_STATS
];
291 struct task_struct
*thread
;
293 struct list_head link
;
296 #define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298 #define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
301 #define SI_MAX_PARMS 4
303 static int force_kipmid
[SI_MAX_PARMS
];
304 static int num_force_kipmid
;
306 static int pci_registered
;
309 static int of_registered
;
312 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
313 static int num_max_busy_us
;
315 static int unload_when_empty
= 1;
317 static int add_smi(struct smi_info
*smi
);
318 static int try_smi_init(struct smi_info
*smi
);
319 static void cleanup_one_si(struct smi_info
*to_clean
);
321 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
322 static int register_xaction_notifier(struct notifier_block
*nb
)
324 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
327 static void deliver_recv_msg(struct smi_info
*smi_info
,
328 struct ipmi_smi_msg
*msg
)
330 /* Deliver the message to the upper layer with the lock
333 if (smi_info
->run_to_completion
) {
334 ipmi_smi_msg_received(smi_info
->intf
, msg
);
336 spin_unlock(&(smi_info
->si_lock
));
337 ipmi_smi_msg_received(smi_info
->intf
, msg
);
338 spin_lock(&(smi_info
->si_lock
));
342 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
344 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
346 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
347 cCode
= IPMI_ERR_UNSPECIFIED
;
348 /* else use it as is */
350 /* Make it a reponse */
351 msg
->rsp
[0] = msg
->data
[0] | 4;
352 msg
->rsp
[1] = msg
->data
[1];
356 smi_info
->curr_msg
= NULL
;
357 deliver_recv_msg(smi_info
, msg
);
360 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
363 struct list_head
*entry
= NULL
;
369 * No need to save flags, we aleady have interrupts off and we
370 * already hold the SMI lock.
372 if (!smi_info
->run_to_completion
)
373 spin_lock(&(smi_info
->msg_lock
));
375 /* Pick the high priority queue first. */
376 if (!list_empty(&(smi_info
->hp_xmit_msgs
))) {
377 entry
= smi_info
->hp_xmit_msgs
.next
;
378 } else if (!list_empty(&(smi_info
->xmit_msgs
))) {
379 entry
= smi_info
->xmit_msgs
.next
;
383 smi_info
->curr_msg
= NULL
;
389 smi_info
->curr_msg
= list_entry(entry
,
394 printk(KERN_DEBUG
"**Start2: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
396 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
398 if (err
& NOTIFY_STOP_MASK
) {
399 rv
= SI_SM_CALL_WITHOUT_DELAY
;
402 err
= smi_info
->handlers
->start_transaction(
404 smi_info
->curr_msg
->data
,
405 smi_info
->curr_msg
->data_size
);
407 return_hosed_msg(smi_info
, err
);
409 rv
= SI_SM_CALL_WITHOUT_DELAY
;
412 if (!smi_info
->run_to_completion
)
413 spin_unlock(&(smi_info
->msg_lock
));
418 static void start_enable_irq(struct smi_info
*smi_info
)
420 unsigned char msg
[2];
423 * If we are enabling interrupts, we have to tell the
426 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
427 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
429 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
430 smi_info
->si_state
= SI_ENABLE_INTERRUPTS1
;
433 static void start_disable_irq(struct smi_info
*smi_info
)
435 unsigned char msg
[2];
437 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
438 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
440 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
441 smi_info
->si_state
= SI_DISABLE_INTERRUPTS1
;
444 static void start_clear_flags(struct smi_info
*smi_info
)
446 unsigned char msg
[3];
448 /* Make sure the watchdog pre-timeout flag is not set at startup. */
449 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
450 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
451 msg
[2] = WDT_PRE_TIMEOUT_INT
;
453 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
454 smi_info
->si_state
= SI_CLEARING_FLAGS
;
458 * When we have a situtaion where we run out of memory and cannot
459 * allocate messages, we just leave them in the BMC and run the system
460 * polled until we can allocate some memory. Once we have some
461 * memory, we will re-enable the interrupt.
463 static inline void disable_si_irq(struct smi_info
*smi_info
)
465 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
466 start_disable_irq(smi_info
);
467 smi_info
->interrupt_disabled
= 1;
468 if (!atomic_read(&smi_info
->stop_operation
))
469 mod_timer(&smi_info
->si_timer
,
470 jiffies
+ SI_TIMEOUT_JIFFIES
);
474 static inline void enable_si_irq(struct smi_info
*smi_info
)
476 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
477 start_enable_irq(smi_info
);
478 smi_info
->interrupt_disabled
= 0;
482 static void handle_flags(struct smi_info
*smi_info
)
485 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
486 /* Watchdog pre-timeout */
487 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
489 start_clear_flags(smi_info
);
490 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
491 spin_unlock(&(smi_info
->si_lock
));
492 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
493 spin_lock(&(smi_info
->si_lock
));
494 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
495 /* Messages available. */
496 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
497 if (!smi_info
->curr_msg
) {
498 disable_si_irq(smi_info
);
499 smi_info
->si_state
= SI_NORMAL
;
502 enable_si_irq(smi_info
);
504 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
505 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
506 smi_info
->curr_msg
->data_size
= 2;
508 smi_info
->handlers
->start_transaction(
510 smi_info
->curr_msg
->data
,
511 smi_info
->curr_msg
->data_size
);
512 smi_info
->si_state
= SI_GETTING_MESSAGES
;
513 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
514 /* Events available. */
515 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
516 if (!smi_info
->curr_msg
) {
517 disable_si_irq(smi_info
);
518 smi_info
->si_state
= SI_NORMAL
;
521 enable_si_irq(smi_info
);
523 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
524 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
525 smi_info
->curr_msg
->data_size
= 2;
527 smi_info
->handlers
->start_transaction(
529 smi_info
->curr_msg
->data
,
530 smi_info
->curr_msg
->data_size
);
531 smi_info
->si_state
= SI_GETTING_EVENTS
;
532 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
533 smi_info
->oem_data_avail_handler
) {
534 if (smi_info
->oem_data_avail_handler(smi_info
))
537 smi_info
->si_state
= SI_NORMAL
;
540 static void handle_transaction_done(struct smi_info
*smi_info
)
542 struct ipmi_smi_msg
*msg
;
547 printk(KERN_DEBUG
"**Done: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
549 switch (smi_info
->si_state
) {
551 if (!smi_info
->curr_msg
)
554 smi_info
->curr_msg
->rsp_size
555 = smi_info
->handlers
->get_result(
557 smi_info
->curr_msg
->rsp
,
558 IPMI_MAX_MSG_LENGTH
);
561 * Do this here becase deliver_recv_msg() releases the
562 * lock, and a new message can be put in during the
563 * time the lock is released.
565 msg
= smi_info
->curr_msg
;
566 smi_info
->curr_msg
= NULL
;
567 deliver_recv_msg(smi_info
, msg
);
570 case SI_GETTING_FLAGS
:
572 unsigned char msg
[4];
575 /* We got the flags from the SMI, now handle them. */
576 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
578 /* Error fetching flags, just give up for now. */
579 smi_info
->si_state
= SI_NORMAL
;
580 } else if (len
< 4) {
582 * Hmm, no flags. That's technically illegal, but
583 * don't use uninitialized data.
585 smi_info
->si_state
= SI_NORMAL
;
587 smi_info
->msg_flags
= msg
[3];
588 handle_flags(smi_info
);
593 case SI_CLEARING_FLAGS
:
594 case SI_CLEARING_FLAGS_THEN_SET_IRQ
:
596 unsigned char msg
[3];
598 /* We cleared the flags. */
599 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
601 /* Error clearing flags */
602 dev_warn(smi_info
->dev
,
603 "Error clearing flags: %2.2x\n", msg
[2]);
605 if (smi_info
->si_state
== SI_CLEARING_FLAGS_THEN_SET_IRQ
)
606 start_enable_irq(smi_info
);
608 smi_info
->si_state
= SI_NORMAL
;
612 case SI_GETTING_EVENTS
:
614 smi_info
->curr_msg
->rsp_size
615 = smi_info
->handlers
->get_result(
617 smi_info
->curr_msg
->rsp
,
618 IPMI_MAX_MSG_LENGTH
);
621 * Do this here becase deliver_recv_msg() releases the
622 * lock, and a new message can be put in during the
623 * time the lock is released.
625 msg
= smi_info
->curr_msg
;
626 smi_info
->curr_msg
= NULL
;
627 if (msg
->rsp
[2] != 0) {
628 /* Error getting event, probably done. */
631 /* Take off the event flag. */
632 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
633 handle_flags(smi_info
);
635 smi_inc_stat(smi_info
, events
);
638 * Do this before we deliver the message
639 * because delivering the message releases the
640 * lock and something else can mess with the
643 handle_flags(smi_info
);
645 deliver_recv_msg(smi_info
, msg
);
650 case SI_GETTING_MESSAGES
:
652 smi_info
->curr_msg
->rsp_size
653 = smi_info
->handlers
->get_result(
655 smi_info
->curr_msg
->rsp
,
656 IPMI_MAX_MSG_LENGTH
);
659 * Do this here becase deliver_recv_msg() releases the
660 * lock, and a new message can be put in during the
661 * time the lock is released.
663 msg
= smi_info
->curr_msg
;
664 smi_info
->curr_msg
= NULL
;
665 if (msg
->rsp
[2] != 0) {
666 /* Error getting event, probably done. */
669 /* Take off the msg flag. */
670 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
671 handle_flags(smi_info
);
673 smi_inc_stat(smi_info
, incoming_messages
);
676 * Do this before we deliver the message
677 * because delivering the message releases the
678 * lock and something else can mess with the
681 handle_flags(smi_info
);
683 deliver_recv_msg(smi_info
, msg
);
688 case SI_ENABLE_INTERRUPTS1
:
690 unsigned char msg
[4];
692 /* We got the flags from the SMI, now handle them. */
693 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
695 dev_warn(smi_info
->dev
, "Could not enable interrupts"
696 ", failed get, using polled mode.\n");
697 smi_info
->si_state
= SI_NORMAL
;
699 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
700 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
702 IPMI_BMC_RCV_MSG_INTR
|
703 IPMI_BMC_EVT_MSG_INTR
);
704 smi_info
->handlers
->start_transaction(
705 smi_info
->si_sm
, msg
, 3);
706 smi_info
->si_state
= SI_ENABLE_INTERRUPTS2
;
711 case SI_ENABLE_INTERRUPTS2
:
713 unsigned char msg
[4];
715 /* We got the flags from the SMI, now handle them. */
716 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
718 dev_warn(smi_info
->dev
, "Could not enable interrupts"
719 ", failed set, using polled mode.\n");
721 smi_info
->interrupt_disabled
= 0;
722 smi_info
->si_state
= SI_NORMAL
;
726 case SI_DISABLE_INTERRUPTS1
:
728 unsigned char msg
[4];
730 /* We got the flags from the SMI, now handle them. */
731 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
733 dev_warn(smi_info
->dev
, "Could not disable interrupts"
735 smi_info
->si_state
= SI_NORMAL
;
737 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
738 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
740 ~(IPMI_BMC_RCV_MSG_INTR
|
741 IPMI_BMC_EVT_MSG_INTR
));
742 smi_info
->handlers
->start_transaction(
743 smi_info
->si_sm
, msg
, 3);
744 smi_info
->si_state
= SI_DISABLE_INTERRUPTS2
;
749 case SI_DISABLE_INTERRUPTS2
:
751 unsigned char msg
[4];
753 /* We got the flags from the SMI, now handle them. */
754 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
756 dev_warn(smi_info
->dev
, "Could not disable interrupts"
759 smi_info
->si_state
= SI_NORMAL
;
766 * Called on timeouts and events. Timeouts should pass the elapsed
767 * time, interrupts should pass in zero. Must be called with
768 * si_lock held and interrupts disabled.
770 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
773 enum si_sm_result si_sm_result
;
777 * There used to be a loop here that waited a little while
778 * (around 25us) before giving up. That turned out to be
779 * pointless, the minimum delays I was seeing were in the 300us
780 * range, which is far too long to wait in an interrupt. So
781 * we just run until the state machine tells us something
782 * happened or it needs a delay.
784 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
786 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
787 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
789 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
790 smi_inc_stat(smi_info
, complete_transactions
);
792 handle_transaction_done(smi_info
);
793 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
794 } else if (si_sm_result
== SI_SM_HOSED
) {
795 smi_inc_stat(smi_info
, hosed_count
);
798 * Do the before return_hosed_msg, because that
801 smi_info
->si_state
= SI_NORMAL
;
802 if (smi_info
->curr_msg
!= NULL
) {
804 * If we were handling a user message, format
805 * a response to send to the upper layer to
806 * tell it about the error.
808 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
810 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
814 * We prefer handling attn over new messages. But don't do
815 * this if there is not yet an upper layer to handle anything.
817 if (likely(smi_info
->intf
) && si_sm_result
== SI_SM_ATTN
) {
818 unsigned char msg
[2];
820 smi_inc_stat(smi_info
, attentions
);
823 * Got a attn, send down a get message flags to see
824 * what's causing it. It would be better to handle
825 * this in the upper layer, but due to the way
826 * interrupts work with the SMI, that's not really
829 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
830 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
832 smi_info
->handlers
->start_transaction(
833 smi_info
->si_sm
, msg
, 2);
834 smi_info
->si_state
= SI_GETTING_FLAGS
;
838 /* If we are currently idle, try to start the next message. */
839 if (si_sm_result
== SI_SM_IDLE
) {
840 smi_inc_stat(smi_info
, idles
);
842 si_sm_result
= start_next_msg(smi_info
);
843 if (si_sm_result
!= SI_SM_IDLE
)
847 if ((si_sm_result
== SI_SM_IDLE
)
848 && (atomic_read(&smi_info
->req_events
))) {
850 * We are idle and the upper layer requested that I fetch
853 atomic_set(&smi_info
->req_events
, 0);
855 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
856 if (!smi_info
->curr_msg
)
859 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
860 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
861 smi_info
->curr_msg
->data_size
= 2;
863 smi_info
->handlers
->start_transaction(
865 smi_info
->curr_msg
->data
,
866 smi_info
->curr_msg
->data_size
);
867 smi_info
->si_state
= SI_GETTING_EVENTS
;
874 static void sender(void *send_info
,
875 struct ipmi_smi_msg
*msg
,
878 struct smi_info
*smi_info
= send_info
;
879 enum si_sm_result result
;
885 if (atomic_read(&smi_info
->stop_operation
)) {
886 msg
->rsp
[0] = msg
->data
[0] | 4;
887 msg
->rsp
[1] = msg
->data
[1];
888 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
890 deliver_recv_msg(smi_info
, msg
);
896 printk("**Enqueue: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
899 mod_timer(&smi_info
->si_timer
, jiffies
+ SI_TIMEOUT_JIFFIES
);
901 if (smi_info
->thread
)
902 wake_up_process(smi_info
->thread
);
904 if (smi_info
->run_to_completion
) {
906 * If we are running to completion, then throw it in
907 * the list and run transactions until everything is
908 * clear. Priority doesn't matter here.
912 * Run to completion means we are single-threaded, no
915 list_add_tail(&(msg
->link
), &(smi_info
->xmit_msgs
));
917 result
= smi_event_handler(smi_info
, 0);
918 while (result
!= SI_SM_IDLE
) {
919 udelay(SI_SHORT_TIMEOUT_USEC
);
920 result
= smi_event_handler(smi_info
,
921 SI_SHORT_TIMEOUT_USEC
);
926 spin_lock_irqsave(&smi_info
->msg_lock
, flags
);
928 list_add_tail(&msg
->link
, &smi_info
->hp_xmit_msgs
);
930 list_add_tail(&msg
->link
, &smi_info
->xmit_msgs
);
931 spin_unlock_irqrestore(&smi_info
->msg_lock
, flags
);
933 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
934 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
)
935 start_next_msg(smi_info
);
936 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
939 static void set_run_to_completion(void *send_info
, int i_run_to_completion
)
941 struct smi_info
*smi_info
= send_info
;
942 enum si_sm_result result
;
944 smi_info
->run_to_completion
= i_run_to_completion
;
945 if (i_run_to_completion
) {
946 result
= smi_event_handler(smi_info
, 0);
947 while (result
!= SI_SM_IDLE
) {
948 udelay(SI_SHORT_TIMEOUT_USEC
);
949 result
= smi_event_handler(smi_info
,
950 SI_SHORT_TIMEOUT_USEC
);
956 * Use -1 in the nsec value of the busy waiting timespec to tell that
957 * we are spinning in kipmid looking for something and not delaying
960 static inline void ipmi_si_set_not_busy(struct timespec
*ts
)
964 static inline int ipmi_si_is_busy(struct timespec
*ts
)
966 return ts
->tv_nsec
!= -1;
969 static int ipmi_thread_busy_wait(enum si_sm_result smi_result
,
970 const struct smi_info
*smi_info
,
971 struct timespec
*busy_until
)
973 unsigned int max_busy_us
= 0;
975 if (smi_info
->intf_num
< num_max_busy_us
)
976 max_busy_us
= kipmid_max_busy_us
[smi_info
->intf_num
];
977 if (max_busy_us
== 0 || smi_result
!= SI_SM_CALL_WITH_DELAY
)
978 ipmi_si_set_not_busy(busy_until
);
979 else if (!ipmi_si_is_busy(busy_until
)) {
980 getnstimeofday(busy_until
);
981 timespec_add_ns(busy_until
, max_busy_us
*NSEC_PER_USEC
);
984 getnstimeofday(&now
);
985 if (unlikely(timespec_compare(&now
, busy_until
) > 0)) {
986 ipmi_si_set_not_busy(busy_until
);
995 * A busy-waiting loop for speeding up IPMI operation.
997 * Lousy hardware makes this hard. This is only enabled for systems
998 * that are not BT and do not have interrupts. It starts spinning
999 * when an operation is complete or until max_busy tells it to stop
1000 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1001 * Documentation/IPMI.txt for details.
1003 static int ipmi_thread(void *data
)
1005 struct smi_info
*smi_info
= data
;
1006 unsigned long flags
;
1007 enum si_sm_result smi_result
;
1008 struct timespec busy_until
;
1010 ipmi_si_set_not_busy(&busy_until
);
1011 set_user_nice(current
, 19);
1012 while (!kthread_should_stop()) {
1015 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1016 smi_result
= smi_event_handler(smi_info
, 0);
1017 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1018 busy_wait
= ipmi_thread_busy_wait(smi_result
, smi_info
,
1020 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
1022 else if (smi_result
== SI_SM_CALL_WITH_DELAY
&& busy_wait
)
1024 else if (smi_result
== SI_SM_IDLE
)
1025 schedule_timeout_interruptible(100);
1027 schedule_timeout_interruptible(1);
1033 static void poll(void *send_info
)
1035 struct smi_info
*smi_info
= send_info
;
1036 unsigned long flags
;
1039 * Make sure there is some delay in the poll loop so we can
1040 * drive time forward and timeout things.
1043 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1044 smi_event_handler(smi_info
, 10);
1045 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1048 static void request_events(void *send_info
)
1050 struct smi_info
*smi_info
= send_info
;
1052 if (atomic_read(&smi_info
->stop_operation
) ||
1053 !smi_info
->has_event_buffer
)
1056 atomic_set(&smi_info
->req_events
, 1);
1059 static int initialized
;
1061 static void smi_timeout(unsigned long data
)
1063 struct smi_info
*smi_info
= (struct smi_info
*) data
;
1064 enum si_sm_result smi_result
;
1065 unsigned long flags
;
1066 unsigned long jiffies_now
;
1073 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1075 do_gettimeofday(&t
);
1076 printk(KERN_DEBUG
"**Timer: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1078 jiffies_now
= jiffies
;
1079 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
1080 * SI_USEC_PER_JIFFY
);
1081 smi_result
= smi_event_handler(smi_info
, time_diff
);
1083 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1085 smi_info
->last_timeout_jiffies
= jiffies_now
;
1087 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1088 /* Running with interrupts, only do long timeouts. */
1089 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1090 smi_inc_stat(smi_info
, long_timeouts
);
1095 * If the state machine asks for a short delay, then shorten
1096 * the timer timeout.
1098 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1099 smi_inc_stat(smi_info
, short_timeouts
);
1100 timeout
= jiffies
+ 1;
1102 smi_inc_stat(smi_info
, long_timeouts
);
1103 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1107 if (smi_result
!= SI_SM_IDLE
)
1108 mod_timer(&(smi_info
->si_timer
), timeout
);
1111 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1113 struct smi_info
*smi_info
= data
;
1114 unsigned long flags
;
1119 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1121 smi_inc_stat(smi_info
, interrupts
);
1124 do_gettimeofday(&t
);
1125 printk(KERN_DEBUG
"**Interrupt: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1127 smi_event_handler(smi_info
, 0);
1128 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1132 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1134 struct smi_info
*smi_info
= data
;
1135 /* We need to clear the IRQ flag for the BT interface. */
1136 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1137 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1138 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1139 return si_irq_handler(irq
, data
);
1142 static int smi_start_processing(void *send_info
,
1145 struct smi_info
*new_smi
= send_info
;
1148 new_smi
->intf
= intf
;
1150 /* Try to claim any interrupts. */
1151 if (new_smi
->irq_setup
)
1152 new_smi
->irq_setup(new_smi
);
1154 /* Set up the timer that drives the interface. */
1155 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1156 new_smi
->last_timeout_jiffies
= jiffies
;
1157 mod_timer(&new_smi
->si_timer
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1160 * Check if the user forcefully enabled the daemon.
1162 if (new_smi
->intf_num
< num_force_kipmid
)
1163 enable
= force_kipmid
[new_smi
->intf_num
];
1165 * The BT interface is efficient enough to not need a thread,
1166 * and there is no need for a thread if we have interrupts.
1168 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1172 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1173 "kipmi%d", new_smi
->intf_num
);
1174 if (IS_ERR(new_smi
->thread
)) {
1175 dev_notice(new_smi
->dev
, "Could not start"
1176 " kernel thread due to error %ld, only using"
1177 " timers to drive the interface\n",
1178 PTR_ERR(new_smi
->thread
));
1179 new_smi
->thread
= NULL
;
1186 static void set_maintenance_mode(void *send_info
, int enable
)
1188 struct smi_info
*smi_info
= send_info
;
1191 atomic_set(&smi_info
->req_events
, 0);
1194 static struct ipmi_smi_handlers handlers
= {
1195 .owner
= THIS_MODULE
,
1196 .start_processing
= smi_start_processing
,
1198 .request_events
= request_events
,
1199 .set_maintenance_mode
= set_maintenance_mode
,
1200 .set_run_to_completion
= set_run_to_completion
,
1205 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1206 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1209 static LIST_HEAD(smi_infos
);
1210 static DEFINE_MUTEX(smi_infos_lock
);
1211 static int smi_num
; /* Used to sequence the SMIs */
1213 #define DEFAULT_REGSPACING 1
1214 #define DEFAULT_REGSIZE 1
1216 static int si_trydefaults
= 1;
1217 static char *si_type
[SI_MAX_PARMS
];
1218 #define MAX_SI_TYPE_STR 30
1219 static char si_type_str
[MAX_SI_TYPE_STR
];
1220 static unsigned long addrs
[SI_MAX_PARMS
];
1221 static unsigned int num_addrs
;
1222 static unsigned int ports
[SI_MAX_PARMS
];
1223 static unsigned int num_ports
;
1224 static int irqs
[SI_MAX_PARMS
];
1225 static unsigned int num_irqs
;
1226 static int regspacings
[SI_MAX_PARMS
];
1227 static unsigned int num_regspacings
;
1228 static int regsizes
[SI_MAX_PARMS
];
1229 static unsigned int num_regsizes
;
1230 static int regshifts
[SI_MAX_PARMS
];
1231 static unsigned int num_regshifts
;
1232 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1233 static unsigned int num_slave_addrs
;
1235 #define IPMI_IO_ADDR_SPACE 0
1236 #define IPMI_MEM_ADDR_SPACE 1
1237 static char *addr_space_to_str
[] = { "i/o", "mem" };
1239 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1241 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1242 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1243 " Documentation/IPMI.txt in the kernel sources for the"
1246 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1247 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1248 " default scan of the KCS and SMIC interface at the standard"
1250 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1251 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1252 " interface separated by commas. The types are 'kcs',"
1253 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1254 " the first interface to kcs and the second to bt");
1255 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1256 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1257 " addresses separated by commas. Only use if an interface"
1258 " is in memory. Otherwise, set it to zero or leave"
1260 module_param_array(ports
, uint
, &num_ports
, 0);
1261 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1262 " addresses separated by commas. Only use if an interface"
1263 " is a port. Otherwise, set it to zero or leave"
1265 module_param_array(irqs
, int, &num_irqs
, 0);
1266 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1267 " addresses separated by commas. Only use if an interface"
1268 " has an interrupt. Otherwise, set it to zero or leave"
1270 module_param_array(regspacings
, int, &num_regspacings
, 0);
1271 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1272 " and each successive register used by the interface. For"
1273 " instance, if the start address is 0xca2 and the spacing"
1274 " is 2, then the second address is at 0xca4. Defaults"
1276 module_param_array(regsizes
, int, &num_regsizes
, 0);
1277 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1278 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1279 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1280 " the 8-bit IPMI register has to be read from a larger"
1282 module_param_array(regshifts
, int, &num_regshifts
, 0);
1283 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1284 " IPMI register, in bits. For instance, if the data"
1285 " is read from a 32-bit word and the IPMI data is in"
1286 " bit 8-15, then the shift would be 8");
1287 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1288 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1289 " the controller. Normally this is 0x20, but can be"
1290 " overridden by this parm. This is an array indexed"
1291 " by interface number.");
1292 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1293 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1294 " disabled(0). Normally the IPMI driver auto-detects"
1295 " this, but the value may be overridden by this parm.");
1296 module_param(unload_when_empty
, int, 0);
1297 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1298 " specified or found, default is 1. Setting to 0"
1299 " is useful for hot add of devices using hotmod.");
1300 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1301 MODULE_PARM_DESC(kipmid_max_busy_us
,
1302 "Max time (in microseconds) to busy-wait for IPMI data before"
1303 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1304 " if kipmid is using up a lot of CPU time.");
1307 static void std_irq_cleanup(struct smi_info
*info
)
1309 if (info
->si_type
== SI_BT
)
1310 /* Disable the interrupt in the BT interface. */
1311 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1312 free_irq(info
->irq
, info
);
1315 static int std_irq_setup(struct smi_info
*info
)
1322 if (info
->si_type
== SI_BT
) {
1323 rv
= request_irq(info
->irq
,
1325 IRQF_SHARED
| IRQF_DISABLED
,
1329 /* Enable the interrupt in the BT interface. */
1330 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1331 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1333 rv
= request_irq(info
->irq
,
1335 IRQF_SHARED
| IRQF_DISABLED
,
1339 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1340 " running polled\n",
1341 DEVICE_NAME
, info
->irq
);
1344 info
->irq_cleanup
= std_irq_cleanup
;
1345 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1351 static unsigned char port_inb(struct si_sm_io
*io
, unsigned int offset
)
1353 unsigned int addr
= io
->addr_data
;
1355 return inb(addr
+ (offset
* io
->regspacing
));
1358 static void port_outb(struct si_sm_io
*io
, unsigned int offset
,
1361 unsigned int addr
= io
->addr_data
;
1363 outb(b
, addr
+ (offset
* io
->regspacing
));
1366 static unsigned char port_inw(struct si_sm_io
*io
, unsigned int offset
)
1368 unsigned int addr
= io
->addr_data
;
1370 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1373 static void port_outw(struct si_sm_io
*io
, unsigned int offset
,
1376 unsigned int addr
= io
->addr_data
;
1378 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1381 static unsigned char port_inl(struct si_sm_io
*io
, unsigned int offset
)
1383 unsigned int addr
= io
->addr_data
;
1385 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1388 static void port_outl(struct si_sm_io
*io
, unsigned int offset
,
1391 unsigned int addr
= io
->addr_data
;
1393 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1396 static void port_cleanup(struct smi_info
*info
)
1398 unsigned int addr
= info
->io
.addr_data
;
1402 for (idx
= 0; idx
< info
->io_size
; idx
++)
1403 release_region(addr
+ idx
* info
->io
.regspacing
,
1408 static int port_setup(struct smi_info
*info
)
1410 unsigned int addr
= info
->io
.addr_data
;
1416 info
->io_cleanup
= port_cleanup
;
1419 * Figure out the actual inb/inw/inl/etc routine to use based
1420 * upon the register size.
1422 switch (info
->io
.regsize
) {
1424 info
->io
.inputb
= port_inb
;
1425 info
->io
.outputb
= port_outb
;
1428 info
->io
.inputb
= port_inw
;
1429 info
->io
.outputb
= port_outw
;
1432 info
->io
.inputb
= port_inl
;
1433 info
->io
.outputb
= port_outl
;
1436 dev_warn(info
->dev
, "Invalid register size: %d\n",
1442 * Some BIOSes reserve disjoint I/O regions in their ACPI
1443 * tables. This causes problems when trying to register the
1444 * entire I/O region. Therefore we must register each I/O
1447 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1448 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1449 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1450 /* Undo allocations */
1452 release_region(addr
+ idx
* info
->io
.regspacing
,
1461 static unsigned char intf_mem_inb(struct si_sm_io
*io
, unsigned int offset
)
1463 return readb((io
->addr
)+(offset
* io
->regspacing
));
1466 static void intf_mem_outb(struct si_sm_io
*io
, unsigned int offset
,
1469 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1472 static unsigned char intf_mem_inw(struct si_sm_io
*io
, unsigned int offset
)
1474 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1478 static void intf_mem_outw(struct si_sm_io
*io
, unsigned int offset
,
1481 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1484 static unsigned char intf_mem_inl(struct si_sm_io
*io
, unsigned int offset
)
1486 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1490 static void intf_mem_outl(struct si_sm_io
*io
, unsigned int offset
,
1493 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1497 static unsigned char mem_inq(struct si_sm_io
*io
, unsigned int offset
)
1499 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1503 static void mem_outq(struct si_sm_io
*io
, unsigned int offset
,
1506 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1510 static void mem_cleanup(struct smi_info
*info
)
1512 unsigned long addr
= info
->io
.addr_data
;
1515 if (info
->io
.addr
) {
1516 iounmap(info
->io
.addr
);
1518 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1519 - (info
->io
.regspacing
- info
->io
.regsize
));
1521 release_mem_region(addr
, mapsize
);
1525 static int mem_setup(struct smi_info
*info
)
1527 unsigned long addr
= info
->io
.addr_data
;
1533 info
->io_cleanup
= mem_cleanup
;
1536 * Figure out the actual readb/readw/readl/etc routine to use based
1537 * upon the register size.
1539 switch (info
->io
.regsize
) {
1541 info
->io
.inputb
= intf_mem_inb
;
1542 info
->io
.outputb
= intf_mem_outb
;
1545 info
->io
.inputb
= intf_mem_inw
;
1546 info
->io
.outputb
= intf_mem_outw
;
1549 info
->io
.inputb
= intf_mem_inl
;
1550 info
->io
.outputb
= intf_mem_outl
;
1554 info
->io
.inputb
= mem_inq
;
1555 info
->io
.outputb
= mem_outq
;
1559 dev_warn(info
->dev
, "Invalid register size: %d\n",
1565 * Calculate the total amount of memory to claim. This is an
1566 * unusual looking calculation, but it avoids claiming any
1567 * more memory than it has to. It will claim everything
1568 * between the first address to the end of the last full
1571 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1572 - (info
->io
.regspacing
- info
->io
.regsize
));
1574 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1577 info
->io
.addr
= ioremap(addr
, mapsize
);
1578 if (info
->io
.addr
== NULL
) {
1579 release_mem_region(addr
, mapsize
);
1586 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1587 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1595 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1596 struct hotmod_vals
{
1600 static struct hotmod_vals hotmod_ops
[] = {
1602 { "remove", HM_REMOVE
},
1605 static struct hotmod_vals hotmod_si
[] = {
1607 { "smic", SI_SMIC
},
1611 static struct hotmod_vals hotmod_as
[] = {
1612 { "mem", IPMI_MEM_ADDR_SPACE
},
1613 { "i/o", IPMI_IO_ADDR_SPACE
},
1617 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1622 s
= strchr(*curr
, ',');
1624 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1629 for (i
= 0; hotmod_ops
[i
].name
; i
++) {
1630 if (strcmp(*curr
, v
[i
].name
) == 0) {
1637 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1641 static int check_hotmod_int_op(const char *curr
, const char *option
,
1642 const char *name
, int *val
)
1646 if (strcmp(curr
, name
) == 0) {
1648 printk(KERN_WARNING PFX
1649 "No option given for '%s'\n",
1653 *val
= simple_strtoul(option
, &n
, 0);
1654 if ((*n
!= '\0') || (*option
== '\0')) {
1655 printk(KERN_WARNING PFX
1656 "Bad option given for '%s'\n",
1665 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1667 char *str
= kstrdup(val
, GFP_KERNEL
);
1669 char *next
, *curr
, *s
, *n
, *o
;
1671 enum si_type si_type
;
1681 struct smi_info
*info
;
1686 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1689 while ((ival
>= 0) && isspace(str
[ival
])) {
1694 for (curr
= str
; curr
; curr
= next
) {
1699 ipmb
= 0; /* Choose the default if not specified */
1701 next
= strchr(curr
, ':');
1707 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1712 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1717 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1721 s
= strchr(curr
, ',');
1726 addr
= simple_strtoul(curr
, &n
, 0);
1727 if ((*n
!= '\0') || (*curr
== '\0')) {
1728 printk(KERN_WARNING PFX
"Invalid hotmod address"
1735 s
= strchr(curr
, ',');
1740 o
= strchr(curr
, '=');
1745 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1750 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1755 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1760 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1765 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1772 printk(KERN_WARNING PFX
1773 "Invalid hotmod option '%s'\n",
1779 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1785 info
->addr_source
= SI_HOTMOD
;
1786 info
->si_type
= si_type
;
1787 info
->io
.addr_data
= addr
;
1788 info
->io
.addr_type
= addr_space
;
1789 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1790 info
->io_setup
= mem_setup
;
1792 info
->io_setup
= port_setup
;
1794 info
->io
.addr
= NULL
;
1795 info
->io
.regspacing
= regspacing
;
1796 if (!info
->io
.regspacing
)
1797 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1798 info
->io
.regsize
= regsize
;
1799 if (!info
->io
.regsize
)
1800 info
->io
.regsize
= DEFAULT_REGSPACING
;
1801 info
->io
.regshift
= regshift
;
1804 info
->irq_setup
= std_irq_setup
;
1805 info
->slave_addr
= ipmb
;
1808 if (try_smi_init(info
))
1809 cleanup_one_si(info
);
1812 struct smi_info
*e
, *tmp_e
;
1814 mutex_lock(&smi_infos_lock
);
1815 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1816 if (e
->io
.addr_type
!= addr_space
)
1818 if (e
->si_type
!= si_type
)
1820 if (e
->io
.addr_data
== addr
)
1823 mutex_unlock(&smi_infos_lock
);
1832 static __devinit
void hardcode_find_bmc(void)
1835 struct smi_info
*info
;
1837 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1838 if (!ports
[i
] && !addrs
[i
])
1841 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1845 info
->addr_source
= SI_HARDCODED
;
1846 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1848 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1849 info
->si_type
= SI_KCS
;
1850 } else if (strcmp(si_type
[i
], "smic") == 0) {
1851 info
->si_type
= SI_SMIC
;
1852 } else if (strcmp(si_type
[i
], "bt") == 0) {
1853 info
->si_type
= SI_BT
;
1855 printk(KERN_WARNING PFX
"Interface type specified "
1856 "for interface %d, was invalid: %s\n",
1864 info
->io_setup
= port_setup
;
1865 info
->io
.addr_data
= ports
[i
];
1866 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1867 } else if (addrs
[i
]) {
1869 info
->io_setup
= mem_setup
;
1870 info
->io
.addr_data
= addrs
[i
];
1871 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1873 printk(KERN_WARNING PFX
"Interface type specified "
1874 "for interface %d, but port and address were "
1875 "not set or set to zero.\n", i
);
1880 info
->io
.addr
= NULL
;
1881 info
->io
.regspacing
= regspacings
[i
];
1882 if (!info
->io
.regspacing
)
1883 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1884 info
->io
.regsize
= regsizes
[i
];
1885 if (!info
->io
.regsize
)
1886 info
->io
.regsize
= DEFAULT_REGSPACING
;
1887 info
->io
.regshift
= regshifts
[i
];
1888 info
->irq
= irqs
[i
];
1890 info
->irq_setup
= std_irq_setup
;
1891 info
->slave_addr
= slave_addrs
[i
];
1894 if (try_smi_init(info
))
1895 cleanup_one_si(info
);
1901 #include <linux/acpi.h>
1904 * Once we get an ACPI failure, we don't try any more, because we go
1905 * through the tables sequentially. Once we don't find a table, there
1908 static int acpi_failure
;
1910 /* For GPE-type interrupts. */
1911 static u32
ipmi_acpi_gpe(void *context
)
1913 struct smi_info
*smi_info
= context
;
1914 unsigned long flags
;
1919 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1921 smi_inc_stat(smi_info
, interrupts
);
1924 do_gettimeofday(&t
);
1925 printk("**ACPI_GPE: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1927 smi_event_handler(smi_info
, 0);
1928 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1930 return ACPI_INTERRUPT_HANDLED
;
1933 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
1938 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
1941 static int acpi_gpe_irq_setup(struct smi_info
*info
)
1948 /* FIXME - is level triggered right? */
1949 status
= acpi_install_gpe_handler(NULL
,
1951 ACPI_GPE_LEVEL_TRIGGERED
,
1954 if (status
!= AE_OK
) {
1955 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
1956 " running polled\n", DEVICE_NAME
, info
->irq
);
1960 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
1961 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
1968 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/
1969 * Docs/TechPapers/IA64/hpspmi.pdf
1980 s8 CreatorRevision
[4];
1983 s16 SpecificationRevision
;
1986 * Bit 0 - SCI interrupt supported
1987 * Bit 1 - I/O APIC/SAPIC
1992 * If bit 0 of InterruptType is set, then this is the SCI
1993 * interrupt in the GPEx_STS register.
2000 * If bit 1 of InterruptType is set, then this is the I/O
2001 * APIC/SAPIC interrupt.
2003 u32 GlobalSystemInterrupt
;
2005 /* The actual register address. */
2006 struct acpi_generic_address addr
;
2010 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2013 static __devinit
int try_init_spmi(struct SPMITable
*spmi
)
2015 struct smi_info
*info
;
2018 if (spmi
->IPMIlegacy
!= 1) {
2019 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2023 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
2024 addr_space
= IPMI_MEM_ADDR_SPACE
;
2026 addr_space
= IPMI_IO_ADDR_SPACE
;
2028 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2030 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2034 info
->addr_source
= SI_SPMI
;
2035 printk(KERN_INFO PFX
"probing via SPMI\n");
2037 /* Figure out the interface type. */
2038 switch (spmi
->InterfaceType
) {
2040 info
->si_type
= SI_KCS
;
2043 info
->si_type
= SI_SMIC
;
2046 info
->si_type
= SI_BT
;
2049 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2050 spmi
->InterfaceType
);
2055 if (spmi
->InterruptType
& 1) {
2056 /* We've got a GPE interrupt. */
2057 info
->irq
= spmi
->GPE
;
2058 info
->irq_setup
= acpi_gpe_irq_setup
;
2059 } else if (spmi
->InterruptType
& 2) {
2060 /* We've got an APIC/SAPIC interrupt. */
2061 info
->irq
= spmi
->GlobalSystemInterrupt
;
2062 info
->irq_setup
= std_irq_setup
;
2064 /* Use the default interrupt setting. */
2066 info
->irq_setup
= NULL
;
2069 if (spmi
->addr
.bit_width
) {
2070 /* A (hopefully) properly formed register bit width. */
2071 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2073 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2075 info
->io
.regsize
= info
->io
.regspacing
;
2076 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2078 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2079 info
->io_setup
= mem_setup
;
2080 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2081 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2082 info
->io_setup
= port_setup
;
2083 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2086 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2089 info
->io
.addr_data
= spmi
->addr
.address
;
2096 static __devinit
void spmi_find_bmc(void)
2099 struct SPMITable
*spmi
;
2108 for (i
= 0; ; i
++) {
2109 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2110 (struct acpi_table_header
**)&spmi
);
2111 if (status
!= AE_OK
)
2114 try_init_spmi(spmi
);
2118 static int __devinit
ipmi_pnp_probe(struct pnp_dev
*dev
,
2119 const struct pnp_device_id
*dev_id
)
2121 struct acpi_device
*acpi_dev
;
2122 struct smi_info
*info
;
2123 struct resource
*res
;
2126 unsigned long long tmp
;
2128 acpi_dev
= pnp_acpi_device(dev
);
2132 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2136 info
->addr_source
= SI_ACPI
;
2137 printk(KERN_INFO PFX
"probing via ACPI\n");
2139 handle
= acpi_dev
->handle
;
2141 /* _IFT tells us the interface type: KCS, BT, etc */
2142 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2143 if (ACPI_FAILURE(status
))
2148 info
->si_type
= SI_KCS
;
2151 info
->si_type
= SI_SMIC
;
2154 info
->si_type
= SI_BT
;
2157 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2161 res
= pnp_get_resource(dev
, IORESOURCE_IO
, 0);
2163 info
->io_setup
= port_setup
;
2164 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2166 res
= pnp_get_resource(dev
, IORESOURCE_MEM
, 0);
2168 info
->io_setup
= mem_setup
;
2169 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2173 dev_err(&dev
->dev
, "no I/O or memory address\n");
2176 info
->io
.addr_data
= res
->start
;
2178 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2179 res
= pnp_get_resource(dev
,
2180 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2181 IORESOURCE_IO
: IORESOURCE_MEM
,
2184 if (res
->start
> info
->io
.addr_data
)
2185 info
->io
.regspacing
= res
->start
- info
->io
.addr_data
;
2187 info
->io
.regsize
= DEFAULT_REGSPACING
;
2188 info
->io
.regshift
= 0;
2190 /* If _GPE exists, use it; otherwise use standard interrupts */
2191 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2192 if (ACPI_SUCCESS(status
)) {
2194 info
->irq_setup
= acpi_gpe_irq_setup
;
2195 } else if (pnp_irq_valid(dev
, 0)) {
2196 info
->irq
= pnp_irq(dev
, 0);
2197 info
->irq_setup
= std_irq_setup
;
2200 info
->dev
= &dev
->dev
;
2201 pnp_set_drvdata(dev
, info
);
2203 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2204 res
, info
->io
.regsize
, info
->io
.regspacing
,
2207 return add_smi(info
);
2214 static void __devexit
ipmi_pnp_remove(struct pnp_dev
*dev
)
2216 struct smi_info
*info
= pnp_get_drvdata(dev
);
2218 cleanup_one_si(info
);
2221 static const struct pnp_device_id pnp_dev_table
[] = {
2226 static struct pnp_driver ipmi_pnp_driver
= {
2227 .name
= DEVICE_NAME
,
2228 .probe
= ipmi_pnp_probe
,
2229 .remove
= __devexit_p(ipmi_pnp_remove
),
2230 .id_table
= pnp_dev_table
,
2235 struct dmi_ipmi_data
{
2238 unsigned long base_addr
;
2244 static int __devinit
decode_dmi(const struct dmi_header
*dm
,
2245 struct dmi_ipmi_data
*dmi
)
2247 const u8
*data
= (const u8
*)dm
;
2248 unsigned long base_addr
;
2250 u8 len
= dm
->length
;
2252 dmi
->type
= data
[4];
2254 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2256 if (base_addr
& 1) {
2258 base_addr
&= 0xFFFE;
2259 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2262 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2264 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2266 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2268 dmi
->irq
= data
[0x11];
2270 /* The top two bits of byte 0x10 hold the register spacing. */
2271 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2272 switch (reg_spacing
) {
2273 case 0x00: /* Byte boundaries */
2276 case 0x01: /* 32-bit boundaries */
2279 case 0x02: /* 16-byte boundaries */
2283 /* Some other interface, just ignore it. */
2289 * Note that technically, the lower bit of the base
2290 * address should be 1 if the address is I/O and 0 if
2291 * the address is in memory. So many systems get that
2292 * wrong (and all that I have seen are I/O) so we just
2293 * ignore that bit and assume I/O. Systems that use
2294 * memory should use the newer spec, anyway.
2296 dmi
->base_addr
= base_addr
& 0xfffe;
2297 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2301 dmi
->slave_addr
= data
[6];
2306 static __devinit
void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2308 struct smi_info
*info
;
2310 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2312 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2316 info
->addr_source
= SI_SMBIOS
;
2317 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2319 switch (ipmi_data
->type
) {
2320 case 0x01: /* KCS */
2321 info
->si_type
= SI_KCS
;
2323 case 0x02: /* SMIC */
2324 info
->si_type
= SI_SMIC
;
2327 info
->si_type
= SI_BT
;
2334 switch (ipmi_data
->addr_space
) {
2335 case IPMI_MEM_ADDR_SPACE
:
2336 info
->io_setup
= mem_setup
;
2337 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2340 case IPMI_IO_ADDR_SPACE
:
2341 info
->io_setup
= port_setup
;
2342 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2347 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2348 ipmi_data
->addr_space
);
2351 info
->io
.addr_data
= ipmi_data
->base_addr
;
2353 info
->io
.regspacing
= ipmi_data
->offset
;
2354 if (!info
->io
.regspacing
)
2355 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2356 info
->io
.regsize
= DEFAULT_REGSPACING
;
2357 info
->io
.regshift
= 0;
2359 info
->slave_addr
= ipmi_data
->slave_addr
;
2361 info
->irq
= ipmi_data
->irq
;
2363 info
->irq_setup
= std_irq_setup
;
2368 static void __devinit
dmi_find_bmc(void)
2370 const struct dmi_device
*dev
= NULL
;
2371 struct dmi_ipmi_data data
;
2374 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2375 memset(&data
, 0, sizeof(data
));
2376 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2379 try_init_dmi(&data
);
2382 #endif /* CONFIG_DMI */
2386 #define PCI_ERMC_CLASSCODE 0x0C0700
2387 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2388 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2389 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2390 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2391 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2393 #define PCI_HP_VENDOR_ID 0x103C
2394 #define PCI_MMC_DEVICE_ID 0x121A
2395 #define PCI_MMC_ADDR_CW 0x10
2397 static void ipmi_pci_cleanup(struct smi_info
*info
)
2399 struct pci_dev
*pdev
= info
->addr_source_data
;
2401 pci_disable_device(pdev
);
2404 static int __devinit
ipmi_pci_probe(struct pci_dev
*pdev
,
2405 const struct pci_device_id
*ent
)
2408 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2409 struct smi_info
*info
;
2411 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2415 info
->addr_source
= SI_PCI
;
2416 dev_info(&pdev
->dev
, "probing via PCI");
2418 switch (class_type
) {
2419 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2420 info
->si_type
= SI_SMIC
;
2423 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2424 info
->si_type
= SI_KCS
;
2427 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2428 info
->si_type
= SI_BT
;
2433 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2437 rv
= pci_enable_device(pdev
);
2439 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2444 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2445 info
->addr_source_data
= pdev
;
2447 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2448 info
->io_setup
= port_setup
;
2449 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2451 info
->io_setup
= mem_setup
;
2452 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2454 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2456 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2457 info
->io
.regsize
= DEFAULT_REGSPACING
;
2458 info
->io
.regshift
= 0;
2460 info
->irq
= pdev
->irq
;
2462 info
->irq_setup
= std_irq_setup
;
2464 info
->dev
= &pdev
->dev
;
2465 pci_set_drvdata(pdev
, info
);
2467 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2468 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2471 return add_smi(info
);
2474 static void __devexit
ipmi_pci_remove(struct pci_dev
*pdev
)
2476 struct smi_info
*info
= pci_get_drvdata(pdev
);
2477 cleanup_one_si(info
);
2481 static int ipmi_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2486 static int ipmi_pci_resume(struct pci_dev
*pdev
)
2492 static struct pci_device_id ipmi_pci_devices
[] = {
2493 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2494 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2497 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2499 static struct pci_driver ipmi_pci_driver
= {
2500 .name
= DEVICE_NAME
,
2501 .id_table
= ipmi_pci_devices
,
2502 .probe
= ipmi_pci_probe
,
2503 .remove
= __devexit_p(ipmi_pci_remove
),
2505 .suspend
= ipmi_pci_suspend
,
2506 .resume
= ipmi_pci_resume
,
2509 #endif /* CONFIG_PCI */
2512 #ifdef CONFIG_PPC_OF
2513 static int __devinit
ipmi_of_probe(struct of_device
*dev
,
2514 const struct of_device_id
*match
)
2516 struct smi_info
*info
;
2517 struct resource resource
;
2518 const int *regsize
, *regspacing
, *regshift
;
2519 struct device_node
*np
= dev
->dev
.of_node
;
2523 dev_info(&dev
->dev
, "probing via device tree\n");
2525 ret
= of_address_to_resource(np
, 0, &resource
);
2527 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2531 regsize
= of_get_property(np
, "reg-size", &proplen
);
2532 if (regsize
&& proplen
!= 4) {
2533 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2537 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2538 if (regspacing
&& proplen
!= 4) {
2539 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2543 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2544 if (regshift
&& proplen
!= 4) {
2545 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2549 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2553 "could not allocate memory for OF probe\n");
2557 info
->si_type
= (enum si_type
) match
->data
;
2558 info
->addr_source
= SI_DEVICETREE
;
2559 info
->irq_setup
= std_irq_setup
;
2561 if (resource
.flags
& IORESOURCE_IO
) {
2562 info
->io_setup
= port_setup
;
2563 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2565 info
->io_setup
= mem_setup
;
2566 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2569 info
->io
.addr_data
= resource
.start
;
2571 info
->io
.regsize
= regsize
? *regsize
: DEFAULT_REGSIZE
;
2572 info
->io
.regspacing
= regspacing
? *regspacing
: DEFAULT_REGSPACING
;
2573 info
->io
.regshift
= regshift
? *regshift
: 0;
2575 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2576 info
->dev
= &dev
->dev
;
2578 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2579 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2582 dev_set_drvdata(&dev
->dev
, info
);
2584 return add_smi(info
);
2587 static int __devexit
ipmi_of_remove(struct of_device
*dev
)
2589 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2593 static struct of_device_id ipmi_match
[] =
2595 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2596 .data
= (void *)(unsigned long) SI_KCS
},
2597 { .type
= "ipmi", .compatible
= "ipmi-smic",
2598 .data
= (void *)(unsigned long) SI_SMIC
},
2599 { .type
= "ipmi", .compatible
= "ipmi-bt",
2600 .data
= (void *)(unsigned long) SI_BT
},
2604 static struct of_platform_driver ipmi_of_platform_driver
= {
2607 .owner
= THIS_MODULE
,
2608 .of_match_table
= ipmi_match
,
2610 .probe
= ipmi_of_probe
,
2611 .remove
= __devexit_p(ipmi_of_remove
),
2613 #endif /* CONFIG_PPC_OF */
2615 static int wait_for_msg_done(struct smi_info
*smi_info
)
2617 enum si_sm_result smi_result
;
2619 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2621 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2622 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2623 schedule_timeout_uninterruptible(1);
2624 smi_result
= smi_info
->handlers
->event(
2625 smi_info
->si_sm
, 100);
2626 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2627 smi_result
= smi_info
->handlers
->event(
2628 smi_info
->si_sm
, 0);
2632 if (smi_result
== SI_SM_HOSED
)
2634 * We couldn't get the state machine to run, so whatever's at
2635 * the port is probably not an IPMI SMI interface.
2642 static int try_get_dev_id(struct smi_info
*smi_info
)
2644 unsigned char msg
[2];
2645 unsigned char *resp
;
2646 unsigned long resp_len
;
2649 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2654 * Do a Get Device ID command, since it comes back with some
2657 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2658 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2659 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2661 rv
= wait_for_msg_done(smi_info
);
2665 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2666 resp
, IPMI_MAX_MSG_LENGTH
);
2668 /* Check and record info from the get device id, in case we need it. */
2669 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2676 static int try_enable_event_buffer(struct smi_info
*smi_info
)
2678 unsigned char msg
[3];
2679 unsigned char *resp
;
2680 unsigned long resp_len
;
2683 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2687 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2688 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2689 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2691 rv
= wait_for_msg_done(smi_info
);
2693 printk(KERN_WARNING PFX
"Error getting response from get"
2694 " global enables command, the event buffer is not"
2699 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2700 resp
, IPMI_MAX_MSG_LENGTH
);
2703 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2704 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2706 printk(KERN_WARNING PFX
"Invalid return from get global"
2707 " enables command, cannot enable the event buffer.\n");
2712 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
)
2713 /* buffer is already enabled, nothing to do. */
2716 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2717 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2718 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
2719 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2721 rv
= wait_for_msg_done(smi_info
);
2723 printk(KERN_WARNING PFX
"Error getting response from set"
2724 " global, enables command, the event buffer is not"
2729 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2730 resp
, IPMI_MAX_MSG_LENGTH
);
2733 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2734 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
2735 printk(KERN_WARNING PFX
"Invalid return from get global,"
2736 "enables command, not enable the event buffer.\n");
2743 * An error when setting the event buffer bit means
2744 * that the event buffer is not supported.
2752 static int type_file_read_proc(char *page
, char **start
, off_t off
,
2753 int count
, int *eof
, void *data
)
2755 struct smi_info
*smi
= data
;
2757 return sprintf(page
, "%s\n", si_to_str
[smi
->si_type
]);
2760 static int stat_file_read_proc(char *page
, char **start
, off_t off
,
2761 int count
, int *eof
, void *data
)
2763 char *out
= (char *) page
;
2764 struct smi_info
*smi
= data
;
2766 out
+= sprintf(out
, "interrupts_enabled: %d\n",
2767 smi
->irq
&& !smi
->interrupt_disabled
);
2768 out
+= sprintf(out
, "short_timeouts: %u\n",
2769 smi_get_stat(smi
, short_timeouts
));
2770 out
+= sprintf(out
, "long_timeouts: %u\n",
2771 smi_get_stat(smi
, long_timeouts
));
2772 out
+= sprintf(out
, "idles: %u\n",
2773 smi_get_stat(smi
, idles
));
2774 out
+= sprintf(out
, "interrupts: %u\n",
2775 smi_get_stat(smi
, interrupts
));
2776 out
+= sprintf(out
, "attentions: %u\n",
2777 smi_get_stat(smi
, attentions
));
2778 out
+= sprintf(out
, "flag_fetches: %u\n",
2779 smi_get_stat(smi
, flag_fetches
));
2780 out
+= sprintf(out
, "hosed_count: %u\n",
2781 smi_get_stat(smi
, hosed_count
));
2782 out
+= sprintf(out
, "complete_transactions: %u\n",
2783 smi_get_stat(smi
, complete_transactions
));
2784 out
+= sprintf(out
, "events: %u\n",
2785 smi_get_stat(smi
, events
));
2786 out
+= sprintf(out
, "watchdog_pretimeouts: %u\n",
2787 smi_get_stat(smi
, watchdog_pretimeouts
));
2788 out
+= sprintf(out
, "incoming_messages: %u\n",
2789 smi_get_stat(smi
, incoming_messages
));
2794 static int param_read_proc(char *page
, char **start
, off_t off
,
2795 int count
, int *eof
, void *data
)
2797 struct smi_info
*smi
= data
;
2799 return sprintf(page
,
2800 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2801 si_to_str
[smi
->si_type
],
2802 addr_space_to_str
[smi
->io
.addr_type
],
2812 * oem_data_avail_to_receive_msg_avail
2813 * @info - smi_info structure with msg_flags set
2815 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2816 * Returns 1 indicating need to re-run handle_flags().
2818 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
2820 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
2826 * setup_dell_poweredge_oem_data_handler
2827 * @info - smi_info.device_id must be populated
2829 * Systems that match, but have firmware version < 1.40 may assert
2830 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2831 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2832 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2833 * as RECEIVE_MSG_AVAIL instead.
2835 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2836 * assert the OEM[012] bits, and if it did, the driver would have to
2837 * change to handle that properly, we don't actually check for the
2839 * Device ID = 0x20 BMC on PowerEdge 8G servers
2840 * Device Revision = 0x80
2841 * Firmware Revision1 = 0x01 BMC version 1.40
2842 * Firmware Revision2 = 0x40 BCD encoded
2843 * IPMI Version = 0x51 IPMI 1.5
2844 * Manufacturer ID = A2 02 00 Dell IANA
2846 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2847 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2850 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2851 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2852 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2853 #define DELL_IANA_MFR_ID 0x0002a2
2854 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
2856 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2857 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
2858 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
2859 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
2860 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
2861 smi_info
->oem_data_avail_handler
=
2862 oem_data_avail_to_receive_msg_avail
;
2863 } else if (ipmi_version_major(id
) < 1 ||
2864 (ipmi_version_major(id
) == 1 &&
2865 ipmi_version_minor(id
) < 5)) {
2866 smi_info
->oem_data_avail_handler
=
2867 oem_data_avail_to_receive_msg_avail
;
2872 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2873 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
2875 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
2877 /* Make it a reponse */
2878 msg
->rsp
[0] = msg
->data
[0] | 4;
2879 msg
->rsp
[1] = msg
->data
[1];
2880 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
2882 smi_info
->curr_msg
= NULL
;
2883 deliver_recv_msg(smi_info
, msg
);
2887 * dell_poweredge_bt_xaction_handler
2888 * @info - smi_info.device_id must be populated
2890 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2891 * not respond to a Get SDR command if the length of the data
2892 * requested is exactly 0x3A, which leads to command timeouts and no
2893 * data returned. This intercepts such commands, and causes userspace
2894 * callers to try again with a different-sized buffer, which succeeds.
2897 #define STORAGE_NETFN 0x0A
2898 #define STORAGE_CMD_GET_SDR 0x23
2899 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
2900 unsigned long unused
,
2903 struct smi_info
*smi_info
= in
;
2904 unsigned char *data
= smi_info
->curr_msg
->data
;
2905 unsigned int size
= smi_info
->curr_msg
->data_size
;
2907 (data
[0]>>2) == STORAGE_NETFN
&&
2908 data
[1] == STORAGE_CMD_GET_SDR
&&
2910 return_hosed_msg_badsize(smi_info
);
2916 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
2917 .notifier_call
= dell_poweredge_bt_xaction_handler
,
2921 * setup_dell_poweredge_bt_xaction_handler
2922 * @info - smi_info.device_id must be filled in already
2924 * Fills in smi_info.device_id.start_transaction_pre_hook
2925 * when we know what function to use there.
2928 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
2930 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2931 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
2932 smi_info
->si_type
== SI_BT
)
2933 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
2937 * setup_oem_data_handler
2938 * @info - smi_info.device_id must be filled in already
2940 * Fills in smi_info.device_id.oem_data_available_handler
2941 * when we know what function to use there.
2944 static void setup_oem_data_handler(struct smi_info
*smi_info
)
2946 setup_dell_poweredge_oem_data_handler(smi_info
);
2949 static void setup_xaction_handlers(struct smi_info
*smi_info
)
2951 setup_dell_poweredge_bt_xaction_handler(smi_info
);
2954 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
2956 if (smi_info
->intf
) {
2958 * The timer and thread are only running if the
2959 * interface has been started up and registered.
2961 if (smi_info
->thread
!= NULL
)
2962 kthread_stop(smi_info
->thread
);
2963 del_timer_sync(&smi_info
->si_timer
);
2967 static __devinitdata
struct ipmi_default_vals
2973 { .type
= SI_KCS
, .port
= 0xca2 },
2974 { .type
= SI_SMIC
, .port
= 0xca9 },
2975 { .type
= SI_BT
, .port
= 0xe4 },
2979 static __devinit
void default_find_bmc(void)
2981 struct smi_info
*info
;
2984 for (i
= 0; ; i
++) {
2985 if (!ipmi_defaults
[i
].port
)
2988 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
2991 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2995 info
->addr_source
= SI_DEFAULT
;
2997 info
->si_type
= ipmi_defaults
[i
].type
;
2998 info
->io_setup
= port_setup
;
2999 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3000 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3002 info
->io
.addr
= NULL
;
3003 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3004 info
->io
.regsize
= DEFAULT_REGSPACING
;
3005 info
->io
.regshift
= 0;
3007 if (add_smi(info
) == 0) {
3008 if ((try_smi_init(info
)) == 0) {
3010 printk(KERN_INFO PFX
"Found default %s"
3011 " state machine at %s address 0x%lx\n",
3012 si_to_str
[info
->si_type
],
3013 addr_space_to_str
[info
->io
.addr_type
],
3014 info
->io
.addr_data
);
3016 cleanup_one_si(info
);
3021 static int is_new_interface(struct smi_info
*info
)
3025 list_for_each_entry(e
, &smi_infos
, link
) {
3026 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3028 if (e
->io
.addr_data
== info
->io
.addr_data
)
3035 static int add_smi(struct smi_info
*new_smi
)
3039 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3040 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3041 si_to_str
[new_smi
->si_type
]);
3042 mutex_lock(&smi_infos_lock
);
3043 if (!is_new_interface(new_smi
)) {
3044 printk(KERN_CONT PFX
"duplicate interface\n");
3049 printk(KERN_CONT
"\n");
3051 /* So we know not to free it unless we have allocated one. */
3052 new_smi
->intf
= NULL
;
3053 new_smi
->si_sm
= NULL
;
3054 new_smi
->handlers
= NULL
;
3056 list_add_tail(&new_smi
->link
, &smi_infos
);
3059 mutex_unlock(&smi_infos_lock
);
3063 static int try_smi_init(struct smi_info
*new_smi
)
3068 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3069 " machine at %s address 0x%lx, slave address 0x%x,"
3071 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3072 si_to_str
[new_smi
->si_type
],
3073 addr_space_to_str
[new_smi
->io
.addr_type
],
3074 new_smi
->io
.addr_data
,
3075 new_smi
->slave_addr
, new_smi
->irq
);
3077 switch (new_smi
->si_type
) {
3079 new_smi
->handlers
= &kcs_smi_handlers
;
3083 new_smi
->handlers
= &smic_smi_handlers
;
3087 new_smi
->handlers
= &bt_smi_handlers
;
3091 /* No support for anything else yet. */
3096 /* Allocate the state machine's data and initialize it. */
3097 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3098 if (!new_smi
->si_sm
) {
3100 "Could not allocate state machine memory\n");
3104 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3107 /* Now that we know the I/O size, we can set up the I/O. */
3108 rv
= new_smi
->io_setup(new_smi
);
3110 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3114 spin_lock_init(&(new_smi
->si_lock
));
3115 spin_lock_init(&(new_smi
->msg_lock
));
3117 /* Do low-level detection first. */
3118 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3119 if (new_smi
->addr_source
)
3120 printk(KERN_INFO PFX
"Interface detection failed\n");
3126 * Attempt a get device id command. If it fails, we probably
3127 * don't have a BMC here.
3129 rv
= try_get_dev_id(new_smi
);
3131 if (new_smi
->addr_source
)
3132 printk(KERN_INFO PFX
"There appears to be no BMC"
3133 " at this location\n");
3137 setup_oem_data_handler(new_smi
);
3138 setup_xaction_handlers(new_smi
);
3140 INIT_LIST_HEAD(&(new_smi
->xmit_msgs
));
3141 INIT_LIST_HEAD(&(new_smi
->hp_xmit_msgs
));
3142 new_smi
->curr_msg
= NULL
;
3143 atomic_set(&new_smi
->req_events
, 0);
3144 new_smi
->run_to_completion
= 0;
3145 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3146 atomic_set(&new_smi
->stats
[i
], 0);
3148 new_smi
->interrupt_disabled
= 1;
3149 atomic_set(&new_smi
->stop_operation
, 0);
3150 new_smi
->intf_num
= smi_num
;
3153 rv
= try_enable_event_buffer(new_smi
);
3155 new_smi
->has_event_buffer
= 1;
3158 * Start clearing the flags before we enable interrupts or the
3159 * timer to avoid racing with the timer.
3161 start_clear_flags(new_smi
);
3162 /* IRQ is defined to be set when non-zero. */
3164 new_smi
->si_state
= SI_CLEARING_FLAGS_THEN_SET_IRQ
;
3166 if (!new_smi
->dev
) {
3168 * If we don't already have a device from something
3169 * else (like PCI), then register a new one.
3171 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3173 if (!new_smi
->pdev
) {
3175 "Unable to allocate platform device\n");
3178 new_smi
->dev
= &new_smi
->pdev
->dev
;
3179 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3181 rv
= platform_device_add(new_smi
->pdev
);
3184 "Unable to register system interface device:"
3189 new_smi
->dev_registered
= 1;
3192 rv
= ipmi_register_smi(&handlers
,
3194 &new_smi
->device_id
,
3197 new_smi
->slave_addr
);
3199 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3201 goto out_err_stop_timer
;
3204 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3205 type_file_read_proc
,
3208 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3209 goto out_err_stop_timer
;
3212 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3213 stat_file_read_proc
,
3216 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3217 goto out_err_stop_timer
;
3220 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3224 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3225 goto out_err_stop_timer
;
3228 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3229 si_to_str
[new_smi
->si_type
]);
3234 atomic_inc(&new_smi
->stop_operation
);
3235 wait_for_timer_and_thread(new_smi
);
3238 new_smi
->interrupt_disabled
= 1;
3240 if (new_smi
->intf
) {
3241 ipmi_unregister_smi(new_smi
->intf
);
3242 new_smi
->intf
= NULL
;
3245 if (new_smi
->irq_cleanup
) {
3246 new_smi
->irq_cleanup(new_smi
);
3247 new_smi
->irq_cleanup
= NULL
;
3251 * Wait until we know that we are out of any interrupt
3252 * handlers might have been running before we freed the
3255 synchronize_sched();
3257 if (new_smi
->si_sm
) {
3258 if (new_smi
->handlers
)
3259 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3260 kfree(new_smi
->si_sm
);
3261 new_smi
->si_sm
= NULL
;
3263 if (new_smi
->addr_source_cleanup
) {
3264 new_smi
->addr_source_cleanup(new_smi
);
3265 new_smi
->addr_source_cleanup
= NULL
;
3267 if (new_smi
->io_cleanup
) {
3268 new_smi
->io_cleanup(new_smi
);
3269 new_smi
->io_cleanup
= NULL
;
3272 if (new_smi
->dev_registered
) {
3273 platform_device_unregister(new_smi
->pdev
);
3274 new_smi
->dev_registered
= 0;
3280 static __devinit
int init_ipmi_si(void)
3286 enum ipmi_addr_src type
= SI_INVALID
;
3292 /* Register the device drivers. */
3293 rv
= driver_register(&ipmi_driver
.driver
);
3295 printk(KERN_ERR PFX
"Unable to register driver: %d\n", rv
);
3300 /* Parse out the si_type string into its components. */
3303 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3305 str
= strchr(str
, ',');
3315 printk(KERN_INFO
"IPMI System Interface driver.\n");
3317 hardcode_find_bmc();
3319 /* If the user gave us a device, they presumably want us to use it */
3320 mutex_lock(&smi_infos_lock
);
3321 if (!list_empty(&smi_infos
)) {
3322 mutex_unlock(&smi_infos_lock
);
3325 mutex_unlock(&smi_infos_lock
);
3328 rv
= pci_register_driver(&ipmi_pci_driver
);
3330 printk(KERN_ERR PFX
"Unable to register PCI driver: %d\n", rv
);
3336 pnp_register_driver(&ipmi_pnp_driver
);
3347 #ifdef CONFIG_PPC_OF
3348 of_register_platform_driver(&ipmi_of_platform_driver
);
3352 /* We prefer devices with interrupts, but in the case of a machine
3353 with multiple BMCs we assume that there will be several instances
3354 of a given type so if we succeed in registering a type then also
3355 try to register everything else of the same type */
3357 mutex_lock(&smi_infos_lock
);
3358 list_for_each_entry(e
, &smi_infos
, link
) {
3359 /* Try to register a device if it has an IRQ and we either
3360 haven't successfully registered a device yet or this
3361 device has the same type as one we successfully registered */
3362 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3363 if (!try_smi_init(e
)) {
3364 type
= e
->addr_source
;
3369 /* type will only have been set if we successfully registered an si */
3371 mutex_unlock(&smi_infos_lock
);
3375 /* Fall back to the preferred device */
3377 list_for_each_entry(e
, &smi_infos
, link
) {
3378 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3379 if (!try_smi_init(e
)) {
3380 type
= e
->addr_source
;
3384 mutex_unlock(&smi_infos_lock
);
3389 if (si_trydefaults
) {
3390 mutex_lock(&smi_infos_lock
);
3391 if (list_empty(&smi_infos
)) {
3392 /* No BMC was found, try defaults. */
3393 mutex_unlock(&smi_infos_lock
);
3396 mutex_unlock(&smi_infos_lock
);
3399 mutex_lock(&smi_infos_lock
);
3400 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3401 mutex_unlock(&smi_infos_lock
);
3404 pci_unregister_driver(&ipmi_pci_driver
);
3407 #ifdef CONFIG_PPC_OF
3409 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3411 driver_unregister(&ipmi_driver
.driver
);
3412 printk(KERN_WARNING PFX
3413 "Unable to find any System Interface(s)\n");
3416 mutex_unlock(&smi_infos_lock
);
3420 module_init(init_ipmi_si
);
3422 static void cleanup_one_si(struct smi_info
*to_clean
)
3425 unsigned long flags
;
3430 list_del(&to_clean
->link
);
3432 /* Tell the driver that we are shutting down. */
3433 atomic_inc(&to_clean
->stop_operation
);
3436 * Make sure the timer and thread are stopped and will not run
3439 wait_for_timer_and_thread(to_clean
);
3442 * Timeouts are stopped, now make sure the interrupts are off
3443 * for the device. A little tricky with locks to make sure
3444 * there are no races.
3446 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3447 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3448 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3450 schedule_timeout_uninterruptible(1);
3451 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3453 disable_si_irq(to_clean
);
3454 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3455 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3457 schedule_timeout_uninterruptible(1);
3460 /* Clean up interrupts and make sure that everything is done. */
3461 if (to_clean
->irq_cleanup
)
3462 to_clean
->irq_cleanup(to_clean
);
3463 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3465 schedule_timeout_uninterruptible(1);
3469 rv
= ipmi_unregister_smi(to_clean
->intf
);
3472 printk(KERN_ERR PFX
"Unable to unregister device: errno=%d\n",
3476 if (to_clean
->handlers
)
3477 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3479 kfree(to_clean
->si_sm
);
3481 if (to_clean
->addr_source_cleanup
)
3482 to_clean
->addr_source_cleanup(to_clean
);
3483 if (to_clean
->io_cleanup
)
3484 to_clean
->io_cleanup(to_clean
);
3486 if (to_clean
->dev_registered
)
3487 platform_device_unregister(to_clean
->pdev
);
3492 static __exit
void cleanup_ipmi_si(void)
3494 struct smi_info
*e
, *tmp_e
;
3501 pci_unregister_driver(&ipmi_pci_driver
);
3504 pnp_unregister_driver(&ipmi_pnp_driver
);
3507 #ifdef CONFIG_PPC_OF
3509 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3512 mutex_lock(&smi_infos_lock
);
3513 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3515 mutex_unlock(&smi_infos_lock
);
3517 driver_unregister(&ipmi_driver
.driver
);
3519 module_exit(cleanup_ipmi_si
);
3521 MODULE_LICENSE("GPL");
3522 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3523 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3524 " system interfaces.");