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.h>
61 #include <linux/ipmi_smi.h>
63 #include "ipmi_si_sm.h"
64 #include <linux/init.h>
65 #include <linux/dmi.h>
66 #include <linux/string.h>
67 #include <linux/ctype.h>
68 #include <linux/pnp.h>
69 #include <linux/of_device.h>
70 #include <linux/of_platform.h>
71 #include <linux/of_address.h>
72 #include <linux/of_irq.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" };
110 static char *ipmi_addr_src_to_str
[] = { NULL
, "hotmod", "hardcoded", "SPMI",
111 "ACPI", "SMBIOS", "PCI",
112 "device-tree", "default" };
114 #define DEVICE_NAME "ipmi_si"
116 static struct platform_driver ipmi_driver
;
119 * Indexes into stats[] in smi_info below.
121 enum si_stat_indexes
{
123 * Number of times the driver requested a timer while an operation
126 SI_STAT_short_timeouts
= 0,
129 * Number of times the driver requested a timer while nothing was in
132 SI_STAT_long_timeouts
,
134 /* Number of times the interface was idle while being polled. */
137 /* Number of interrupts the driver handled. */
140 /* Number of time the driver got an ATTN from the hardware. */
143 /* Number of times the driver requested flags from the hardware. */
144 SI_STAT_flag_fetches
,
146 /* Number of times the hardware didn't follow the state machine. */
149 /* Number of completed messages. */
150 SI_STAT_complete_transactions
,
152 /* Number of IPMI events received from the hardware. */
155 /* Number of watchdog pretimeouts. */
156 SI_STAT_watchdog_pretimeouts
,
158 /* Number of asyncronous messages received. */
159 SI_STAT_incoming_messages
,
162 /* This *must* remain last, add new values above this. */
169 struct si_sm_data
*si_sm
;
170 struct si_sm_handlers
*handlers
;
171 enum si_type si_type
;
174 struct list_head xmit_msgs
;
175 struct list_head hp_xmit_msgs
;
176 struct ipmi_smi_msg
*curr_msg
;
177 enum si_intf_state si_state
;
180 * Used to handle the various types of I/O that can occur with
184 int (*io_setup
)(struct smi_info
*info
);
185 void (*io_cleanup
)(struct smi_info
*info
);
186 int (*irq_setup
)(struct smi_info
*info
);
187 void (*irq_cleanup
)(struct smi_info
*info
);
188 unsigned int io_size
;
189 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
190 void (*addr_source_cleanup
)(struct smi_info
*info
);
191 void *addr_source_data
;
194 * Per-OEM handler, called from handle_flags(). Returns 1
195 * when handle_flags() needs to be re-run or 0 indicating it
196 * set si_state itself.
198 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
201 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
202 * is set to hold the flags until we are done handling everything
205 #define RECEIVE_MSG_AVAIL 0x01
206 #define EVENT_MSG_BUFFER_FULL 0x02
207 #define WDT_PRE_TIMEOUT_INT 0x08
208 #define OEM0_DATA_AVAIL 0x20
209 #define OEM1_DATA_AVAIL 0x40
210 #define OEM2_DATA_AVAIL 0x80
211 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
214 unsigned char msg_flags
;
216 /* Does the BMC have an event buffer? */
217 char has_event_buffer
;
220 * If set to true, this will request events the next time the
221 * state machine is idle.
226 * If true, run the state machine to completion on every send
227 * call. Generally used after a panic to make sure stuff goes
230 int run_to_completion
;
232 /* The I/O port of an SI interface. */
236 * The space between start addresses of the two ports. For
237 * instance, if the first port is 0xca2 and the spacing is 4, then
238 * the second port is 0xca6.
240 unsigned int spacing
;
242 /* zero if no irq; */
245 /* The timer for this si. */
246 struct timer_list si_timer
;
248 /* The time (in jiffies) the last timeout occurred at. */
249 unsigned long last_timeout_jiffies
;
251 /* Used to gracefully stop the timer without race conditions. */
252 atomic_t stop_operation
;
255 * The driver will disable interrupts when it gets into a
256 * situation where it cannot handle messages due to lack of
257 * memory. Once that situation clears up, it will re-enable
260 int interrupt_disabled
;
262 /* From the get device id response... */
263 struct ipmi_device_id device_id
;
265 /* Driver model stuff. */
267 struct platform_device
*pdev
;
270 * True if we allocated the device, false if it came from
271 * someplace else (like PCI).
275 /* Slave address, could be reported from DMI. */
276 unsigned char slave_addr
;
278 /* Counters and things for the proc filesystem. */
279 atomic_t stats
[SI_NUM_STATS
];
281 struct task_struct
*thread
;
283 struct list_head link
;
284 union ipmi_smi_info_union addr_info
;
287 #define smi_inc_stat(smi, stat) \
288 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
289 #define smi_get_stat(smi, stat) \
290 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
292 #define SI_MAX_PARMS 4
294 static int force_kipmid
[SI_MAX_PARMS
];
295 static int num_force_kipmid
;
297 static int pci_registered
;
300 static int pnp_registered
;
303 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
304 static int num_max_busy_us
;
306 static int unload_when_empty
= 1;
308 static int add_smi(struct smi_info
*smi
);
309 static int try_smi_init(struct smi_info
*smi
);
310 static void cleanup_one_si(struct smi_info
*to_clean
);
311 static void cleanup_ipmi_si(void);
313 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
314 static int register_xaction_notifier(struct notifier_block
*nb
)
316 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
319 static void deliver_recv_msg(struct smi_info
*smi_info
,
320 struct ipmi_smi_msg
*msg
)
322 /* Deliver the message to the upper layer with the lock
325 if (smi_info
->run_to_completion
) {
326 ipmi_smi_msg_received(smi_info
->intf
, msg
);
328 spin_unlock(&(smi_info
->si_lock
));
329 ipmi_smi_msg_received(smi_info
->intf
, msg
);
330 spin_lock(&(smi_info
->si_lock
));
334 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
336 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
338 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
339 cCode
= IPMI_ERR_UNSPECIFIED
;
340 /* else use it as is */
342 /* Make it a reponse */
343 msg
->rsp
[0] = msg
->data
[0] | 4;
344 msg
->rsp
[1] = msg
->data
[1];
348 smi_info
->curr_msg
= NULL
;
349 deliver_recv_msg(smi_info
, msg
);
352 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
355 struct list_head
*entry
= NULL
;
361 * No need to save flags, we aleady have interrupts off and we
362 * already hold the SMI lock.
364 if (!smi_info
->run_to_completion
)
365 spin_lock(&(smi_info
->msg_lock
));
367 /* Pick the high priority queue first. */
368 if (!list_empty(&(smi_info
->hp_xmit_msgs
))) {
369 entry
= smi_info
->hp_xmit_msgs
.next
;
370 } else if (!list_empty(&(smi_info
->xmit_msgs
))) {
371 entry
= smi_info
->xmit_msgs
.next
;
375 smi_info
->curr_msg
= NULL
;
381 smi_info
->curr_msg
= list_entry(entry
,
386 printk(KERN_DEBUG
"**Start2: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
388 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
390 if (err
& NOTIFY_STOP_MASK
) {
391 rv
= SI_SM_CALL_WITHOUT_DELAY
;
394 err
= smi_info
->handlers
->start_transaction(
396 smi_info
->curr_msg
->data
,
397 smi_info
->curr_msg
->data_size
);
399 return_hosed_msg(smi_info
, err
);
401 rv
= SI_SM_CALL_WITHOUT_DELAY
;
404 if (!smi_info
->run_to_completion
)
405 spin_unlock(&(smi_info
->msg_lock
));
410 static void start_enable_irq(struct smi_info
*smi_info
)
412 unsigned char msg
[2];
415 * If we are enabling interrupts, we have to tell the
418 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
419 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
421 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
422 smi_info
->si_state
= SI_ENABLE_INTERRUPTS1
;
425 static void start_disable_irq(struct smi_info
*smi_info
)
427 unsigned char msg
[2];
429 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
430 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
432 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
433 smi_info
->si_state
= SI_DISABLE_INTERRUPTS1
;
436 static void start_clear_flags(struct smi_info
*smi_info
)
438 unsigned char msg
[3];
440 /* Make sure the watchdog pre-timeout flag is not set at startup. */
441 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
442 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
443 msg
[2] = WDT_PRE_TIMEOUT_INT
;
445 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
446 smi_info
->si_state
= SI_CLEARING_FLAGS
;
450 * When we have a situtaion where we run out of memory and cannot
451 * allocate messages, we just leave them in the BMC and run the system
452 * polled until we can allocate some memory. Once we have some
453 * memory, we will re-enable the interrupt.
455 static inline void disable_si_irq(struct smi_info
*smi_info
)
457 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
458 start_disable_irq(smi_info
);
459 smi_info
->interrupt_disabled
= 1;
460 if (!atomic_read(&smi_info
->stop_operation
))
461 mod_timer(&smi_info
->si_timer
,
462 jiffies
+ SI_TIMEOUT_JIFFIES
);
466 static inline void enable_si_irq(struct smi_info
*smi_info
)
468 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
469 start_enable_irq(smi_info
);
470 smi_info
->interrupt_disabled
= 0;
474 static void handle_flags(struct smi_info
*smi_info
)
477 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
478 /* Watchdog pre-timeout */
479 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
481 start_clear_flags(smi_info
);
482 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
483 spin_unlock(&(smi_info
->si_lock
));
484 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
485 spin_lock(&(smi_info
->si_lock
));
486 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
487 /* Messages available. */
488 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
489 if (!smi_info
->curr_msg
) {
490 disable_si_irq(smi_info
);
491 smi_info
->si_state
= SI_NORMAL
;
494 enable_si_irq(smi_info
);
496 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
497 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
498 smi_info
->curr_msg
->data_size
= 2;
500 smi_info
->handlers
->start_transaction(
502 smi_info
->curr_msg
->data
,
503 smi_info
->curr_msg
->data_size
);
504 smi_info
->si_state
= SI_GETTING_MESSAGES
;
505 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
506 /* Events available. */
507 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
508 if (!smi_info
->curr_msg
) {
509 disable_si_irq(smi_info
);
510 smi_info
->si_state
= SI_NORMAL
;
513 enable_si_irq(smi_info
);
515 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
516 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
517 smi_info
->curr_msg
->data_size
= 2;
519 smi_info
->handlers
->start_transaction(
521 smi_info
->curr_msg
->data
,
522 smi_info
->curr_msg
->data_size
);
523 smi_info
->si_state
= SI_GETTING_EVENTS
;
524 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
525 smi_info
->oem_data_avail_handler
) {
526 if (smi_info
->oem_data_avail_handler(smi_info
))
529 smi_info
->si_state
= SI_NORMAL
;
532 static void handle_transaction_done(struct smi_info
*smi_info
)
534 struct ipmi_smi_msg
*msg
;
539 printk(KERN_DEBUG
"**Done: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
541 switch (smi_info
->si_state
) {
543 if (!smi_info
->curr_msg
)
546 smi_info
->curr_msg
->rsp_size
547 = smi_info
->handlers
->get_result(
549 smi_info
->curr_msg
->rsp
,
550 IPMI_MAX_MSG_LENGTH
);
553 * Do this here becase deliver_recv_msg() releases the
554 * lock, and a new message can be put in during the
555 * time the lock is released.
557 msg
= smi_info
->curr_msg
;
558 smi_info
->curr_msg
= NULL
;
559 deliver_recv_msg(smi_info
, msg
);
562 case SI_GETTING_FLAGS
:
564 unsigned char msg
[4];
567 /* We got the flags from the SMI, now handle them. */
568 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
570 /* Error fetching flags, just give up for now. */
571 smi_info
->si_state
= SI_NORMAL
;
572 } else if (len
< 4) {
574 * Hmm, no flags. That's technically illegal, but
575 * don't use uninitialized data.
577 smi_info
->si_state
= SI_NORMAL
;
579 smi_info
->msg_flags
= msg
[3];
580 handle_flags(smi_info
);
585 case SI_CLEARING_FLAGS
:
586 case SI_CLEARING_FLAGS_THEN_SET_IRQ
:
588 unsigned char msg
[3];
590 /* We cleared the flags. */
591 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
593 /* Error clearing flags */
594 dev_warn(smi_info
->dev
,
595 "Error clearing flags: %2.2x\n", msg
[2]);
597 if (smi_info
->si_state
== SI_CLEARING_FLAGS_THEN_SET_IRQ
)
598 start_enable_irq(smi_info
);
600 smi_info
->si_state
= SI_NORMAL
;
604 case SI_GETTING_EVENTS
:
606 smi_info
->curr_msg
->rsp_size
607 = smi_info
->handlers
->get_result(
609 smi_info
->curr_msg
->rsp
,
610 IPMI_MAX_MSG_LENGTH
);
613 * Do this here becase deliver_recv_msg() releases the
614 * lock, and a new message can be put in during the
615 * time the lock is released.
617 msg
= smi_info
->curr_msg
;
618 smi_info
->curr_msg
= NULL
;
619 if (msg
->rsp
[2] != 0) {
620 /* Error getting event, probably done. */
623 /* Take off the event flag. */
624 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
625 handle_flags(smi_info
);
627 smi_inc_stat(smi_info
, events
);
630 * Do this before we deliver the message
631 * because delivering the message releases the
632 * lock and something else can mess with the
635 handle_flags(smi_info
);
637 deliver_recv_msg(smi_info
, msg
);
642 case SI_GETTING_MESSAGES
:
644 smi_info
->curr_msg
->rsp_size
645 = smi_info
->handlers
->get_result(
647 smi_info
->curr_msg
->rsp
,
648 IPMI_MAX_MSG_LENGTH
);
651 * Do this here becase deliver_recv_msg() releases the
652 * lock, and a new message can be put in during the
653 * time the lock is released.
655 msg
= smi_info
->curr_msg
;
656 smi_info
->curr_msg
= NULL
;
657 if (msg
->rsp
[2] != 0) {
658 /* Error getting event, probably done. */
661 /* Take off the msg flag. */
662 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
663 handle_flags(smi_info
);
665 smi_inc_stat(smi_info
, incoming_messages
);
668 * Do this before we deliver the message
669 * because delivering the message releases the
670 * lock and something else can mess with the
673 handle_flags(smi_info
);
675 deliver_recv_msg(smi_info
, msg
);
680 case SI_ENABLE_INTERRUPTS1
:
682 unsigned char msg
[4];
684 /* We got the flags from the SMI, now handle them. */
685 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
687 dev_warn(smi_info
->dev
, "Could not enable interrupts"
688 ", failed get, using polled mode.\n");
689 smi_info
->si_state
= SI_NORMAL
;
691 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
692 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
694 IPMI_BMC_RCV_MSG_INTR
|
695 IPMI_BMC_EVT_MSG_INTR
);
696 smi_info
->handlers
->start_transaction(
697 smi_info
->si_sm
, msg
, 3);
698 smi_info
->si_state
= SI_ENABLE_INTERRUPTS2
;
703 case SI_ENABLE_INTERRUPTS2
:
705 unsigned char msg
[4];
707 /* We got the flags from the SMI, now handle them. */
708 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
710 dev_warn(smi_info
->dev
, "Could not enable interrupts"
711 ", failed set, using polled mode.\n");
713 smi_info
->interrupt_disabled
= 0;
714 smi_info
->si_state
= SI_NORMAL
;
718 case SI_DISABLE_INTERRUPTS1
:
720 unsigned char msg
[4];
722 /* We got the flags from the SMI, now handle them. */
723 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
725 dev_warn(smi_info
->dev
, "Could not disable interrupts"
727 smi_info
->si_state
= SI_NORMAL
;
729 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
730 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
732 ~(IPMI_BMC_RCV_MSG_INTR
|
733 IPMI_BMC_EVT_MSG_INTR
));
734 smi_info
->handlers
->start_transaction(
735 smi_info
->si_sm
, msg
, 3);
736 smi_info
->si_state
= SI_DISABLE_INTERRUPTS2
;
741 case SI_DISABLE_INTERRUPTS2
:
743 unsigned char msg
[4];
745 /* We got the flags from the SMI, now handle them. */
746 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
748 dev_warn(smi_info
->dev
, "Could not disable interrupts"
751 smi_info
->si_state
= SI_NORMAL
;
758 * Called on timeouts and events. Timeouts should pass the elapsed
759 * time, interrupts should pass in zero. Must be called with
760 * si_lock held and interrupts disabled.
762 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
765 enum si_sm_result si_sm_result
;
769 * There used to be a loop here that waited a little while
770 * (around 25us) before giving up. That turned out to be
771 * pointless, the minimum delays I was seeing were in the 300us
772 * range, which is far too long to wait in an interrupt. So
773 * we just run until the state machine tells us something
774 * happened or it needs a delay.
776 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
778 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
779 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
781 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
782 smi_inc_stat(smi_info
, complete_transactions
);
784 handle_transaction_done(smi_info
);
785 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
786 } else if (si_sm_result
== SI_SM_HOSED
) {
787 smi_inc_stat(smi_info
, hosed_count
);
790 * Do the before return_hosed_msg, because that
793 smi_info
->si_state
= SI_NORMAL
;
794 if (smi_info
->curr_msg
!= NULL
) {
796 * If we were handling a user message, format
797 * a response to send to the upper layer to
798 * tell it about the error.
800 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
802 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
806 * We prefer handling attn over new messages. But don't do
807 * this if there is not yet an upper layer to handle anything.
809 if (likely(smi_info
->intf
) && si_sm_result
== SI_SM_ATTN
) {
810 unsigned char msg
[2];
812 smi_inc_stat(smi_info
, attentions
);
815 * Got a attn, send down a get message flags to see
816 * what's causing it. It would be better to handle
817 * this in the upper layer, but due to the way
818 * interrupts work with the SMI, that's not really
821 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
822 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
824 smi_info
->handlers
->start_transaction(
825 smi_info
->si_sm
, msg
, 2);
826 smi_info
->si_state
= SI_GETTING_FLAGS
;
830 /* If we are currently idle, try to start the next message. */
831 if (si_sm_result
== SI_SM_IDLE
) {
832 smi_inc_stat(smi_info
, idles
);
834 si_sm_result
= start_next_msg(smi_info
);
835 if (si_sm_result
!= SI_SM_IDLE
)
839 if ((si_sm_result
== SI_SM_IDLE
)
840 && (atomic_read(&smi_info
->req_events
))) {
842 * We are idle and the upper layer requested that I fetch
845 atomic_set(&smi_info
->req_events
, 0);
847 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
848 if (!smi_info
->curr_msg
)
851 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
852 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
853 smi_info
->curr_msg
->data_size
= 2;
855 smi_info
->handlers
->start_transaction(
857 smi_info
->curr_msg
->data
,
858 smi_info
->curr_msg
->data_size
);
859 smi_info
->si_state
= SI_GETTING_EVENTS
;
866 static void sender(void *send_info
,
867 struct ipmi_smi_msg
*msg
,
870 struct smi_info
*smi_info
= send_info
;
871 enum si_sm_result result
;
877 if (atomic_read(&smi_info
->stop_operation
)) {
878 msg
->rsp
[0] = msg
->data
[0] | 4;
879 msg
->rsp
[1] = msg
->data
[1];
880 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
882 deliver_recv_msg(smi_info
, msg
);
888 printk("**Enqueue: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
892 * last_timeout_jiffies is updated here to avoid
893 * smi_timeout() handler passing very large time_diff
894 * value to smi_event_handler() that causes
895 * the send command to abort.
897 smi_info
->last_timeout_jiffies
= jiffies
;
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 int get_smi_info(void *send_info
, struct ipmi_smi_info
*data
)
1188 struct smi_info
*smi
= send_info
;
1190 data
->addr_src
= smi
->addr_source
;
1191 data
->dev
= smi
->dev
;
1192 data
->addr_info
= smi
->addr_info
;
1193 get_device(smi
->dev
);
1198 static void set_maintenance_mode(void *send_info
, int enable
)
1200 struct smi_info
*smi_info
= send_info
;
1203 atomic_set(&smi_info
->req_events
, 0);
1206 static struct ipmi_smi_handlers handlers
= {
1207 .owner
= THIS_MODULE
,
1208 .start_processing
= smi_start_processing
,
1209 .get_smi_info
= get_smi_info
,
1211 .request_events
= request_events
,
1212 .set_maintenance_mode
= set_maintenance_mode
,
1213 .set_run_to_completion
= set_run_to_completion
,
1218 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1219 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1222 static LIST_HEAD(smi_infos
);
1223 static DEFINE_MUTEX(smi_infos_lock
);
1224 static int smi_num
; /* Used to sequence the SMIs */
1226 #define DEFAULT_REGSPACING 1
1227 #define DEFAULT_REGSIZE 1
1229 static int si_trydefaults
= 1;
1230 static char *si_type
[SI_MAX_PARMS
];
1231 #define MAX_SI_TYPE_STR 30
1232 static char si_type_str
[MAX_SI_TYPE_STR
];
1233 static unsigned long addrs
[SI_MAX_PARMS
];
1234 static unsigned int num_addrs
;
1235 static unsigned int ports
[SI_MAX_PARMS
];
1236 static unsigned int num_ports
;
1237 static int irqs
[SI_MAX_PARMS
];
1238 static unsigned int num_irqs
;
1239 static int regspacings
[SI_MAX_PARMS
];
1240 static unsigned int num_regspacings
;
1241 static int regsizes
[SI_MAX_PARMS
];
1242 static unsigned int num_regsizes
;
1243 static int regshifts
[SI_MAX_PARMS
];
1244 static unsigned int num_regshifts
;
1245 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1246 static unsigned int num_slave_addrs
;
1248 #define IPMI_IO_ADDR_SPACE 0
1249 #define IPMI_MEM_ADDR_SPACE 1
1250 static char *addr_space_to_str
[] = { "i/o", "mem" };
1252 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1254 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1255 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1256 " Documentation/IPMI.txt in the kernel sources for the"
1259 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1260 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1261 " default scan of the KCS and SMIC interface at the standard"
1263 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1264 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1265 " interface separated by commas. The types are 'kcs',"
1266 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1267 " the first interface to kcs and the second to bt");
1268 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1269 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1270 " addresses separated by commas. Only use if an interface"
1271 " is in memory. Otherwise, set it to zero or leave"
1273 module_param_array(ports
, uint
, &num_ports
, 0);
1274 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1275 " addresses separated by commas. Only use if an interface"
1276 " is a port. Otherwise, set it to zero or leave"
1278 module_param_array(irqs
, int, &num_irqs
, 0);
1279 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1280 " addresses separated by commas. Only use if an interface"
1281 " has an interrupt. Otherwise, set it to zero or leave"
1283 module_param_array(regspacings
, int, &num_regspacings
, 0);
1284 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1285 " and each successive register used by the interface. For"
1286 " instance, if the start address is 0xca2 and the spacing"
1287 " is 2, then the second address is at 0xca4. Defaults"
1289 module_param_array(regsizes
, int, &num_regsizes
, 0);
1290 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1291 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1292 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1293 " the 8-bit IPMI register has to be read from a larger"
1295 module_param_array(regshifts
, int, &num_regshifts
, 0);
1296 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1297 " IPMI register, in bits. For instance, if the data"
1298 " is read from a 32-bit word and the IPMI data is in"
1299 " bit 8-15, then the shift would be 8");
1300 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1301 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1302 " the controller. Normally this is 0x20, but can be"
1303 " overridden by this parm. This is an array indexed"
1304 " by interface number.");
1305 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1306 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1307 " disabled(0). Normally the IPMI driver auto-detects"
1308 " this, but the value may be overridden by this parm.");
1309 module_param(unload_when_empty
, int, 0);
1310 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1311 " specified or found, default is 1. Setting to 0"
1312 " is useful for hot add of devices using hotmod.");
1313 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1314 MODULE_PARM_DESC(kipmid_max_busy_us
,
1315 "Max time (in microseconds) to busy-wait for IPMI data before"
1316 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1317 " if kipmid is using up a lot of CPU time.");
1320 static void std_irq_cleanup(struct smi_info
*info
)
1322 if (info
->si_type
== SI_BT
)
1323 /* Disable the interrupt in the BT interface. */
1324 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1325 free_irq(info
->irq
, info
);
1328 static int std_irq_setup(struct smi_info
*info
)
1335 if (info
->si_type
== SI_BT
) {
1336 rv
= request_irq(info
->irq
,
1338 IRQF_SHARED
| IRQF_DISABLED
,
1342 /* Enable the interrupt in the BT interface. */
1343 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1344 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1346 rv
= request_irq(info
->irq
,
1348 IRQF_SHARED
| IRQF_DISABLED
,
1352 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1353 " running polled\n",
1354 DEVICE_NAME
, info
->irq
);
1357 info
->irq_cleanup
= std_irq_cleanup
;
1358 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1364 static unsigned char port_inb(struct si_sm_io
*io
, unsigned int offset
)
1366 unsigned int addr
= io
->addr_data
;
1368 return inb(addr
+ (offset
* io
->regspacing
));
1371 static void port_outb(struct si_sm_io
*io
, unsigned int offset
,
1374 unsigned int addr
= io
->addr_data
;
1376 outb(b
, addr
+ (offset
* io
->regspacing
));
1379 static unsigned char port_inw(struct si_sm_io
*io
, unsigned int offset
)
1381 unsigned int addr
= io
->addr_data
;
1383 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1386 static void port_outw(struct si_sm_io
*io
, unsigned int offset
,
1389 unsigned int addr
= io
->addr_data
;
1391 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1394 static unsigned char port_inl(struct si_sm_io
*io
, unsigned int offset
)
1396 unsigned int addr
= io
->addr_data
;
1398 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1401 static void port_outl(struct si_sm_io
*io
, unsigned int offset
,
1404 unsigned int addr
= io
->addr_data
;
1406 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1409 static void port_cleanup(struct smi_info
*info
)
1411 unsigned int addr
= info
->io
.addr_data
;
1415 for (idx
= 0; idx
< info
->io_size
; idx
++)
1416 release_region(addr
+ idx
* info
->io
.regspacing
,
1421 static int port_setup(struct smi_info
*info
)
1423 unsigned int addr
= info
->io
.addr_data
;
1429 info
->io_cleanup
= port_cleanup
;
1432 * Figure out the actual inb/inw/inl/etc routine to use based
1433 * upon the register size.
1435 switch (info
->io
.regsize
) {
1437 info
->io
.inputb
= port_inb
;
1438 info
->io
.outputb
= port_outb
;
1441 info
->io
.inputb
= port_inw
;
1442 info
->io
.outputb
= port_outw
;
1445 info
->io
.inputb
= port_inl
;
1446 info
->io
.outputb
= port_outl
;
1449 dev_warn(info
->dev
, "Invalid register size: %d\n",
1455 * Some BIOSes reserve disjoint I/O regions in their ACPI
1456 * tables. This causes problems when trying to register the
1457 * entire I/O region. Therefore we must register each I/O
1460 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1461 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1462 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1463 /* Undo allocations */
1465 release_region(addr
+ idx
* info
->io
.regspacing
,
1474 static unsigned char intf_mem_inb(struct si_sm_io
*io
, unsigned int offset
)
1476 return readb((io
->addr
)+(offset
* io
->regspacing
));
1479 static void intf_mem_outb(struct si_sm_io
*io
, unsigned int offset
,
1482 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1485 static unsigned char intf_mem_inw(struct si_sm_io
*io
, unsigned int offset
)
1487 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1491 static void intf_mem_outw(struct si_sm_io
*io
, unsigned int offset
,
1494 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1497 static unsigned char intf_mem_inl(struct si_sm_io
*io
, unsigned int offset
)
1499 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1503 static void intf_mem_outl(struct si_sm_io
*io
, unsigned int offset
,
1506 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1510 static unsigned char mem_inq(struct si_sm_io
*io
, unsigned int offset
)
1512 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1516 static void mem_outq(struct si_sm_io
*io
, unsigned int offset
,
1519 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1523 static void mem_cleanup(struct smi_info
*info
)
1525 unsigned long addr
= info
->io
.addr_data
;
1528 if (info
->io
.addr
) {
1529 iounmap(info
->io
.addr
);
1531 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1532 - (info
->io
.regspacing
- info
->io
.regsize
));
1534 release_mem_region(addr
, mapsize
);
1538 static int mem_setup(struct smi_info
*info
)
1540 unsigned long addr
= info
->io
.addr_data
;
1546 info
->io_cleanup
= mem_cleanup
;
1549 * Figure out the actual readb/readw/readl/etc routine to use based
1550 * upon the register size.
1552 switch (info
->io
.regsize
) {
1554 info
->io
.inputb
= intf_mem_inb
;
1555 info
->io
.outputb
= intf_mem_outb
;
1558 info
->io
.inputb
= intf_mem_inw
;
1559 info
->io
.outputb
= intf_mem_outw
;
1562 info
->io
.inputb
= intf_mem_inl
;
1563 info
->io
.outputb
= intf_mem_outl
;
1567 info
->io
.inputb
= mem_inq
;
1568 info
->io
.outputb
= mem_outq
;
1572 dev_warn(info
->dev
, "Invalid register size: %d\n",
1578 * Calculate the total amount of memory to claim. This is an
1579 * unusual looking calculation, but it avoids claiming any
1580 * more memory than it has to. It will claim everything
1581 * between the first address to the end of the last full
1584 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1585 - (info
->io
.regspacing
- info
->io
.regsize
));
1587 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1590 info
->io
.addr
= ioremap(addr
, mapsize
);
1591 if (info
->io
.addr
== NULL
) {
1592 release_mem_region(addr
, mapsize
);
1599 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1600 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1608 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1609 struct hotmod_vals
{
1613 static struct hotmod_vals hotmod_ops
[] = {
1615 { "remove", HM_REMOVE
},
1618 static struct hotmod_vals hotmod_si
[] = {
1620 { "smic", SI_SMIC
},
1624 static struct hotmod_vals hotmod_as
[] = {
1625 { "mem", IPMI_MEM_ADDR_SPACE
},
1626 { "i/o", IPMI_IO_ADDR_SPACE
},
1630 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1635 s
= strchr(*curr
, ',');
1637 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1642 for (i
= 0; hotmod_ops
[i
].name
; i
++) {
1643 if (strcmp(*curr
, v
[i
].name
) == 0) {
1650 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1654 static int check_hotmod_int_op(const char *curr
, const char *option
,
1655 const char *name
, int *val
)
1659 if (strcmp(curr
, name
) == 0) {
1661 printk(KERN_WARNING PFX
1662 "No option given for '%s'\n",
1666 *val
= simple_strtoul(option
, &n
, 0);
1667 if ((*n
!= '\0') || (*option
== '\0')) {
1668 printk(KERN_WARNING PFX
1669 "Bad option given for '%s'\n",
1678 static struct smi_info
*smi_info_alloc(void)
1680 struct smi_info
*info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1683 spin_lock_init(&info
->si_lock
);
1684 spin_lock_init(&info
->msg_lock
);
1689 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1691 char *str
= kstrdup(val
, GFP_KERNEL
);
1693 char *next
, *curr
, *s
, *n
, *o
;
1695 enum si_type si_type
;
1705 struct smi_info
*info
;
1710 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1713 while ((ival
>= 0) && isspace(str
[ival
])) {
1718 for (curr
= str
; curr
; curr
= next
) {
1723 ipmb
= 0; /* Choose the default if not specified */
1725 next
= strchr(curr
, ':');
1731 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1736 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1741 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1745 s
= strchr(curr
, ',');
1750 addr
= simple_strtoul(curr
, &n
, 0);
1751 if ((*n
!= '\0') || (*curr
== '\0')) {
1752 printk(KERN_WARNING PFX
"Invalid hotmod address"
1759 s
= strchr(curr
, ',');
1764 o
= strchr(curr
, '=');
1769 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1774 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1779 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1784 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1789 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1796 printk(KERN_WARNING PFX
1797 "Invalid hotmod option '%s'\n",
1803 info
= smi_info_alloc();
1809 info
->addr_source
= SI_HOTMOD
;
1810 info
->si_type
= si_type
;
1811 info
->io
.addr_data
= addr
;
1812 info
->io
.addr_type
= addr_space
;
1813 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1814 info
->io_setup
= mem_setup
;
1816 info
->io_setup
= port_setup
;
1818 info
->io
.addr
= NULL
;
1819 info
->io
.regspacing
= regspacing
;
1820 if (!info
->io
.regspacing
)
1821 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1822 info
->io
.regsize
= regsize
;
1823 if (!info
->io
.regsize
)
1824 info
->io
.regsize
= DEFAULT_REGSPACING
;
1825 info
->io
.regshift
= regshift
;
1828 info
->irq_setup
= std_irq_setup
;
1829 info
->slave_addr
= ipmb
;
1831 if (!add_smi(info
)) {
1832 if (try_smi_init(info
))
1833 cleanup_one_si(info
);
1839 struct smi_info
*e
, *tmp_e
;
1841 mutex_lock(&smi_infos_lock
);
1842 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1843 if (e
->io
.addr_type
!= addr_space
)
1845 if (e
->si_type
!= si_type
)
1847 if (e
->io
.addr_data
== addr
)
1850 mutex_unlock(&smi_infos_lock
);
1859 static int __devinit
hardcode_find_bmc(void)
1863 struct smi_info
*info
;
1865 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1866 if (!ports
[i
] && !addrs
[i
])
1869 info
= smi_info_alloc();
1873 info
->addr_source
= SI_HARDCODED
;
1874 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1876 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1877 info
->si_type
= SI_KCS
;
1878 } else if (strcmp(si_type
[i
], "smic") == 0) {
1879 info
->si_type
= SI_SMIC
;
1880 } else if (strcmp(si_type
[i
], "bt") == 0) {
1881 info
->si_type
= SI_BT
;
1883 printk(KERN_WARNING PFX
"Interface type specified "
1884 "for interface %d, was invalid: %s\n",
1892 info
->io_setup
= port_setup
;
1893 info
->io
.addr_data
= ports
[i
];
1894 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1895 } else if (addrs
[i
]) {
1897 info
->io_setup
= mem_setup
;
1898 info
->io
.addr_data
= addrs
[i
];
1899 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1901 printk(KERN_WARNING PFX
"Interface type specified "
1902 "for interface %d, but port and address were "
1903 "not set or set to zero.\n", i
);
1908 info
->io
.addr
= NULL
;
1909 info
->io
.regspacing
= regspacings
[i
];
1910 if (!info
->io
.regspacing
)
1911 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1912 info
->io
.regsize
= regsizes
[i
];
1913 if (!info
->io
.regsize
)
1914 info
->io
.regsize
= DEFAULT_REGSPACING
;
1915 info
->io
.regshift
= regshifts
[i
];
1916 info
->irq
= irqs
[i
];
1918 info
->irq_setup
= std_irq_setup
;
1919 info
->slave_addr
= slave_addrs
[i
];
1921 if (!add_smi(info
)) {
1922 if (try_smi_init(info
))
1923 cleanup_one_si(info
);
1934 #include <linux/acpi.h>
1937 * Once we get an ACPI failure, we don't try any more, because we go
1938 * through the tables sequentially. Once we don't find a table, there
1941 static int acpi_failure
;
1943 /* For GPE-type interrupts. */
1944 static u32
ipmi_acpi_gpe(acpi_handle gpe_device
,
1945 u32 gpe_number
, void *context
)
1947 struct smi_info
*smi_info
= context
;
1948 unsigned long flags
;
1953 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1955 smi_inc_stat(smi_info
, interrupts
);
1958 do_gettimeofday(&t
);
1959 printk("**ACPI_GPE: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1961 smi_event_handler(smi_info
, 0);
1962 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1964 return ACPI_INTERRUPT_HANDLED
;
1967 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
1972 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
1975 static int acpi_gpe_irq_setup(struct smi_info
*info
)
1982 /* FIXME - is level triggered right? */
1983 status
= acpi_install_gpe_handler(NULL
,
1985 ACPI_GPE_LEVEL_TRIGGERED
,
1988 if (status
!= AE_OK
) {
1989 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
1990 " running polled\n", DEVICE_NAME
, info
->irq
);
1994 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
1995 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
2002 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2013 s8 CreatorRevision
[4];
2016 s16 SpecificationRevision
;
2019 * Bit 0 - SCI interrupt supported
2020 * Bit 1 - I/O APIC/SAPIC
2025 * If bit 0 of InterruptType is set, then this is the SCI
2026 * interrupt in the GPEx_STS register.
2033 * If bit 1 of InterruptType is set, then this is the I/O
2034 * APIC/SAPIC interrupt.
2036 u32 GlobalSystemInterrupt
;
2038 /* The actual register address. */
2039 struct acpi_generic_address addr
;
2043 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2046 static int __devinit
try_init_spmi(struct SPMITable
*spmi
)
2048 struct smi_info
*info
;
2050 if (spmi
->IPMIlegacy
!= 1) {
2051 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2055 info
= smi_info_alloc();
2057 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2061 info
->addr_source
= SI_SPMI
;
2062 printk(KERN_INFO PFX
"probing via SPMI\n");
2064 /* Figure out the interface type. */
2065 switch (spmi
->InterfaceType
) {
2067 info
->si_type
= SI_KCS
;
2070 info
->si_type
= SI_SMIC
;
2073 info
->si_type
= SI_BT
;
2076 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2077 spmi
->InterfaceType
);
2082 if (spmi
->InterruptType
& 1) {
2083 /* We've got a GPE interrupt. */
2084 info
->irq
= spmi
->GPE
;
2085 info
->irq_setup
= acpi_gpe_irq_setup
;
2086 } else if (spmi
->InterruptType
& 2) {
2087 /* We've got an APIC/SAPIC interrupt. */
2088 info
->irq
= spmi
->GlobalSystemInterrupt
;
2089 info
->irq_setup
= std_irq_setup
;
2091 /* Use the default interrupt setting. */
2093 info
->irq_setup
= NULL
;
2096 if (spmi
->addr
.bit_width
) {
2097 /* A (hopefully) properly formed register bit width. */
2098 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2100 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2102 info
->io
.regsize
= info
->io
.regspacing
;
2103 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2105 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2106 info
->io_setup
= mem_setup
;
2107 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2108 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2109 info
->io_setup
= port_setup
;
2110 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2113 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2116 info
->io
.addr_data
= spmi
->addr
.address
;
2118 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2119 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2120 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2129 static void __devinit
spmi_find_bmc(void)
2132 struct SPMITable
*spmi
;
2141 for (i
= 0; ; i
++) {
2142 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2143 (struct acpi_table_header
**)&spmi
);
2144 if (status
!= AE_OK
)
2147 try_init_spmi(spmi
);
2151 static int __devinit
ipmi_pnp_probe(struct pnp_dev
*dev
,
2152 const struct pnp_device_id
*dev_id
)
2154 struct acpi_device
*acpi_dev
;
2155 struct smi_info
*info
;
2156 struct resource
*res
, *res_second
;
2159 unsigned long long tmp
;
2161 acpi_dev
= pnp_acpi_device(dev
);
2165 info
= smi_info_alloc();
2169 info
->addr_source
= SI_ACPI
;
2170 printk(KERN_INFO PFX
"probing via ACPI\n");
2172 handle
= acpi_dev
->handle
;
2173 info
->addr_info
.acpi_info
.acpi_handle
= handle
;
2175 /* _IFT tells us the interface type: KCS, BT, etc */
2176 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2177 if (ACPI_FAILURE(status
))
2182 info
->si_type
= SI_KCS
;
2185 info
->si_type
= SI_SMIC
;
2188 info
->si_type
= SI_BT
;
2191 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2195 res
= pnp_get_resource(dev
, IORESOURCE_IO
, 0);
2197 info
->io_setup
= port_setup
;
2198 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2200 res
= pnp_get_resource(dev
, IORESOURCE_MEM
, 0);
2202 info
->io_setup
= mem_setup
;
2203 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2207 dev_err(&dev
->dev
, "no I/O or memory address\n");
2210 info
->io
.addr_data
= res
->start
;
2212 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2213 res_second
= pnp_get_resource(dev
,
2214 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2215 IORESOURCE_IO
: IORESOURCE_MEM
,
2218 if (res_second
->start
> info
->io
.addr_data
)
2219 info
->io
.regspacing
= res_second
->start
- info
->io
.addr_data
;
2221 info
->io
.regsize
= DEFAULT_REGSPACING
;
2222 info
->io
.regshift
= 0;
2224 /* If _GPE exists, use it; otherwise use standard interrupts */
2225 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2226 if (ACPI_SUCCESS(status
)) {
2228 info
->irq_setup
= acpi_gpe_irq_setup
;
2229 } else if (pnp_irq_valid(dev
, 0)) {
2230 info
->irq
= pnp_irq(dev
, 0);
2231 info
->irq_setup
= std_irq_setup
;
2234 info
->dev
= &dev
->dev
;
2235 pnp_set_drvdata(dev
, info
);
2237 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2238 res
, info
->io
.regsize
, info
->io
.regspacing
,
2251 static void __devexit
ipmi_pnp_remove(struct pnp_dev
*dev
)
2253 struct smi_info
*info
= pnp_get_drvdata(dev
);
2255 cleanup_one_si(info
);
2258 static const struct pnp_device_id pnp_dev_table
[] = {
2263 static struct pnp_driver ipmi_pnp_driver
= {
2264 .name
= DEVICE_NAME
,
2265 .probe
= ipmi_pnp_probe
,
2266 .remove
= __devexit_p(ipmi_pnp_remove
),
2267 .id_table
= pnp_dev_table
,
2272 struct dmi_ipmi_data
{
2275 unsigned long base_addr
;
2281 static int __devinit
decode_dmi(const struct dmi_header
*dm
,
2282 struct dmi_ipmi_data
*dmi
)
2284 const u8
*data
= (const u8
*)dm
;
2285 unsigned long base_addr
;
2287 u8 len
= dm
->length
;
2289 dmi
->type
= data
[4];
2291 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2293 if (base_addr
& 1) {
2295 base_addr
&= 0xFFFE;
2296 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2299 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2301 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2303 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2305 dmi
->irq
= data
[0x11];
2307 /* The top two bits of byte 0x10 hold the register spacing. */
2308 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2309 switch (reg_spacing
) {
2310 case 0x00: /* Byte boundaries */
2313 case 0x01: /* 32-bit boundaries */
2316 case 0x02: /* 16-byte boundaries */
2320 /* Some other interface, just ignore it. */
2326 * Note that technically, the lower bit of the base
2327 * address should be 1 if the address is I/O and 0 if
2328 * the address is in memory. So many systems get that
2329 * wrong (and all that I have seen are I/O) so we just
2330 * ignore that bit and assume I/O. Systems that use
2331 * memory should use the newer spec, anyway.
2333 dmi
->base_addr
= base_addr
& 0xfffe;
2334 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2338 dmi
->slave_addr
= data
[6];
2343 static void __devinit
try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2345 struct smi_info
*info
;
2347 info
= smi_info_alloc();
2349 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2353 info
->addr_source
= SI_SMBIOS
;
2354 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2356 switch (ipmi_data
->type
) {
2357 case 0x01: /* KCS */
2358 info
->si_type
= SI_KCS
;
2360 case 0x02: /* SMIC */
2361 info
->si_type
= SI_SMIC
;
2364 info
->si_type
= SI_BT
;
2371 switch (ipmi_data
->addr_space
) {
2372 case IPMI_MEM_ADDR_SPACE
:
2373 info
->io_setup
= mem_setup
;
2374 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2377 case IPMI_IO_ADDR_SPACE
:
2378 info
->io_setup
= port_setup
;
2379 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2384 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2385 ipmi_data
->addr_space
);
2388 info
->io
.addr_data
= ipmi_data
->base_addr
;
2390 info
->io
.regspacing
= ipmi_data
->offset
;
2391 if (!info
->io
.regspacing
)
2392 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2393 info
->io
.regsize
= DEFAULT_REGSPACING
;
2394 info
->io
.regshift
= 0;
2396 info
->slave_addr
= ipmi_data
->slave_addr
;
2398 info
->irq
= ipmi_data
->irq
;
2400 info
->irq_setup
= std_irq_setup
;
2402 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2403 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2404 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2411 static void __devinit
dmi_find_bmc(void)
2413 const struct dmi_device
*dev
= NULL
;
2414 struct dmi_ipmi_data data
;
2417 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2418 memset(&data
, 0, sizeof(data
));
2419 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2422 try_init_dmi(&data
);
2425 #endif /* CONFIG_DMI */
2429 #define PCI_ERMC_CLASSCODE 0x0C0700
2430 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2431 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2432 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2433 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2434 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2436 #define PCI_HP_VENDOR_ID 0x103C
2437 #define PCI_MMC_DEVICE_ID 0x121A
2438 #define PCI_MMC_ADDR_CW 0x10
2440 static void ipmi_pci_cleanup(struct smi_info
*info
)
2442 struct pci_dev
*pdev
= info
->addr_source_data
;
2444 pci_disable_device(pdev
);
2447 static int __devinit
ipmi_pci_probe(struct pci_dev
*pdev
,
2448 const struct pci_device_id
*ent
)
2451 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2452 struct smi_info
*info
;
2454 info
= smi_info_alloc();
2458 info
->addr_source
= SI_PCI
;
2459 dev_info(&pdev
->dev
, "probing via PCI");
2461 switch (class_type
) {
2462 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2463 info
->si_type
= SI_SMIC
;
2466 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2467 info
->si_type
= SI_KCS
;
2470 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2471 info
->si_type
= SI_BT
;
2476 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2480 rv
= pci_enable_device(pdev
);
2482 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2487 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2488 info
->addr_source_data
= pdev
;
2490 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2491 info
->io_setup
= port_setup
;
2492 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2494 info
->io_setup
= mem_setup
;
2495 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2497 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2499 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2500 info
->io
.regsize
= DEFAULT_REGSPACING
;
2501 info
->io
.regshift
= 0;
2503 info
->irq
= pdev
->irq
;
2505 info
->irq_setup
= std_irq_setup
;
2507 info
->dev
= &pdev
->dev
;
2508 pci_set_drvdata(pdev
, info
);
2510 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2511 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2520 static void __devexit
ipmi_pci_remove(struct pci_dev
*pdev
)
2522 struct smi_info
*info
= pci_get_drvdata(pdev
);
2523 cleanup_one_si(info
);
2527 static int ipmi_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2532 static int ipmi_pci_resume(struct pci_dev
*pdev
)
2538 static struct pci_device_id ipmi_pci_devices
[] = {
2539 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2540 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2543 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2545 static struct pci_driver ipmi_pci_driver
= {
2546 .name
= DEVICE_NAME
,
2547 .id_table
= ipmi_pci_devices
,
2548 .probe
= ipmi_pci_probe
,
2549 .remove
= __devexit_p(ipmi_pci_remove
),
2551 .suspend
= ipmi_pci_suspend
,
2552 .resume
= ipmi_pci_resume
,
2555 #endif /* CONFIG_PCI */
2557 static int __devinit
ipmi_probe(struct platform_device
*dev
)
2560 struct smi_info
*info
;
2561 struct resource resource
;
2562 const __be32
*regsize
, *regspacing
, *regshift
;
2563 struct device_node
*np
= dev
->dev
.of_node
;
2567 dev_info(&dev
->dev
, "probing via device tree\n");
2569 if (!dev
->dev
.of_match
)
2572 ret
= of_address_to_resource(np
, 0, &resource
);
2574 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2578 regsize
= of_get_property(np
, "reg-size", &proplen
);
2579 if (regsize
&& proplen
!= 4) {
2580 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2584 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2585 if (regspacing
&& proplen
!= 4) {
2586 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2590 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2591 if (regshift
&& proplen
!= 4) {
2592 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2596 info
= smi_info_alloc();
2600 "could not allocate memory for OF probe\n");
2604 info
->si_type
= (enum si_type
) dev
->dev
.of_match
->data
;
2605 info
->addr_source
= SI_DEVICETREE
;
2606 info
->irq_setup
= std_irq_setup
;
2608 if (resource
.flags
& IORESOURCE_IO
) {
2609 info
->io_setup
= port_setup
;
2610 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2612 info
->io_setup
= mem_setup
;
2613 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2616 info
->io
.addr_data
= resource
.start
;
2618 info
->io
.regsize
= regsize
? be32_to_cpup(regsize
) : DEFAULT_REGSIZE
;
2619 info
->io
.regspacing
= regspacing
? be32_to_cpup(regspacing
) : DEFAULT_REGSPACING
;
2620 info
->io
.regshift
= regshift
? be32_to_cpup(regshift
) : 0;
2622 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2623 info
->dev
= &dev
->dev
;
2625 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2626 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2629 dev_set_drvdata(&dev
->dev
, info
);
2631 if (add_smi(info
)) {
2639 static int __devexit
ipmi_remove(struct platform_device
*dev
)
2642 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2647 static struct of_device_id ipmi_match
[] =
2649 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2650 .data
= (void *)(unsigned long) SI_KCS
},
2651 { .type
= "ipmi", .compatible
= "ipmi-smic",
2652 .data
= (void *)(unsigned long) SI_SMIC
},
2653 { .type
= "ipmi", .compatible
= "ipmi-bt",
2654 .data
= (void *)(unsigned long) SI_BT
},
2658 static struct platform_driver ipmi_driver
= {
2660 .name
= DEVICE_NAME
,
2661 .owner
= THIS_MODULE
,
2662 .of_match_table
= ipmi_match
,
2664 .probe
= ipmi_probe
,
2665 .remove
= __devexit_p(ipmi_remove
),
2668 static int wait_for_msg_done(struct smi_info
*smi_info
)
2670 enum si_sm_result smi_result
;
2672 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2674 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2675 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2676 schedule_timeout_uninterruptible(1);
2677 smi_result
= smi_info
->handlers
->event(
2678 smi_info
->si_sm
, 100);
2679 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2680 smi_result
= smi_info
->handlers
->event(
2681 smi_info
->si_sm
, 0);
2685 if (smi_result
== SI_SM_HOSED
)
2687 * We couldn't get the state machine to run, so whatever's at
2688 * the port is probably not an IPMI SMI interface.
2695 static int try_get_dev_id(struct smi_info
*smi_info
)
2697 unsigned char msg
[2];
2698 unsigned char *resp
;
2699 unsigned long resp_len
;
2702 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2707 * Do a Get Device ID command, since it comes back with some
2710 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2711 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2712 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2714 rv
= wait_for_msg_done(smi_info
);
2718 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2719 resp
, IPMI_MAX_MSG_LENGTH
);
2721 /* Check and record info from the get device id, in case we need it. */
2722 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2729 static int try_enable_event_buffer(struct smi_info
*smi_info
)
2731 unsigned char msg
[3];
2732 unsigned char *resp
;
2733 unsigned long resp_len
;
2736 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2740 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2741 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2742 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2744 rv
= wait_for_msg_done(smi_info
);
2746 printk(KERN_WARNING PFX
"Error getting response from get"
2747 " global enables command, the event buffer is not"
2752 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2753 resp
, IPMI_MAX_MSG_LENGTH
);
2756 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2757 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2759 printk(KERN_WARNING PFX
"Invalid return from get global"
2760 " enables command, cannot enable the event buffer.\n");
2765 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
)
2766 /* buffer is already enabled, nothing to do. */
2769 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2770 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2771 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
2772 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2774 rv
= wait_for_msg_done(smi_info
);
2776 printk(KERN_WARNING PFX
"Error getting response from set"
2777 " global, enables command, the event buffer is not"
2782 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2783 resp
, IPMI_MAX_MSG_LENGTH
);
2786 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2787 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
2788 printk(KERN_WARNING PFX
"Invalid return from get global,"
2789 "enables command, not enable the event buffer.\n");
2796 * An error when setting the event buffer bit means
2797 * that the event buffer is not supported.
2805 static int type_file_read_proc(char *page
, char **start
, off_t off
,
2806 int count
, int *eof
, void *data
)
2808 struct smi_info
*smi
= data
;
2810 return sprintf(page
, "%s\n", si_to_str
[smi
->si_type
]);
2813 static int stat_file_read_proc(char *page
, char **start
, off_t off
,
2814 int count
, int *eof
, void *data
)
2816 char *out
= (char *) page
;
2817 struct smi_info
*smi
= data
;
2819 out
+= sprintf(out
, "interrupts_enabled: %d\n",
2820 smi
->irq
&& !smi
->interrupt_disabled
);
2821 out
+= sprintf(out
, "short_timeouts: %u\n",
2822 smi_get_stat(smi
, short_timeouts
));
2823 out
+= sprintf(out
, "long_timeouts: %u\n",
2824 smi_get_stat(smi
, long_timeouts
));
2825 out
+= sprintf(out
, "idles: %u\n",
2826 smi_get_stat(smi
, idles
));
2827 out
+= sprintf(out
, "interrupts: %u\n",
2828 smi_get_stat(smi
, interrupts
));
2829 out
+= sprintf(out
, "attentions: %u\n",
2830 smi_get_stat(smi
, attentions
));
2831 out
+= sprintf(out
, "flag_fetches: %u\n",
2832 smi_get_stat(smi
, flag_fetches
));
2833 out
+= sprintf(out
, "hosed_count: %u\n",
2834 smi_get_stat(smi
, hosed_count
));
2835 out
+= sprintf(out
, "complete_transactions: %u\n",
2836 smi_get_stat(smi
, complete_transactions
));
2837 out
+= sprintf(out
, "events: %u\n",
2838 smi_get_stat(smi
, events
));
2839 out
+= sprintf(out
, "watchdog_pretimeouts: %u\n",
2840 smi_get_stat(smi
, watchdog_pretimeouts
));
2841 out
+= sprintf(out
, "incoming_messages: %u\n",
2842 smi_get_stat(smi
, incoming_messages
));
2847 static int param_read_proc(char *page
, char **start
, off_t off
,
2848 int count
, int *eof
, void *data
)
2850 struct smi_info
*smi
= data
;
2852 return sprintf(page
,
2853 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2854 si_to_str
[smi
->si_type
],
2855 addr_space_to_str
[smi
->io
.addr_type
],
2865 * oem_data_avail_to_receive_msg_avail
2866 * @info - smi_info structure with msg_flags set
2868 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2869 * Returns 1 indicating need to re-run handle_flags().
2871 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
2873 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
2879 * setup_dell_poweredge_oem_data_handler
2880 * @info - smi_info.device_id must be populated
2882 * Systems that match, but have firmware version < 1.40 may assert
2883 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2884 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2885 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2886 * as RECEIVE_MSG_AVAIL instead.
2888 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2889 * assert the OEM[012] bits, and if it did, the driver would have to
2890 * change to handle that properly, we don't actually check for the
2892 * Device ID = 0x20 BMC on PowerEdge 8G servers
2893 * Device Revision = 0x80
2894 * Firmware Revision1 = 0x01 BMC version 1.40
2895 * Firmware Revision2 = 0x40 BCD encoded
2896 * IPMI Version = 0x51 IPMI 1.5
2897 * Manufacturer ID = A2 02 00 Dell IANA
2899 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2900 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2903 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2904 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2905 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2906 #define DELL_IANA_MFR_ID 0x0002a2
2907 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
2909 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2910 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
2911 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
2912 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
2913 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
2914 smi_info
->oem_data_avail_handler
=
2915 oem_data_avail_to_receive_msg_avail
;
2916 } else if (ipmi_version_major(id
) < 1 ||
2917 (ipmi_version_major(id
) == 1 &&
2918 ipmi_version_minor(id
) < 5)) {
2919 smi_info
->oem_data_avail_handler
=
2920 oem_data_avail_to_receive_msg_avail
;
2925 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2926 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
2928 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
2930 /* Make it a reponse */
2931 msg
->rsp
[0] = msg
->data
[0] | 4;
2932 msg
->rsp
[1] = msg
->data
[1];
2933 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
2935 smi_info
->curr_msg
= NULL
;
2936 deliver_recv_msg(smi_info
, msg
);
2940 * dell_poweredge_bt_xaction_handler
2941 * @info - smi_info.device_id must be populated
2943 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2944 * not respond to a Get SDR command if the length of the data
2945 * requested is exactly 0x3A, which leads to command timeouts and no
2946 * data returned. This intercepts such commands, and causes userspace
2947 * callers to try again with a different-sized buffer, which succeeds.
2950 #define STORAGE_NETFN 0x0A
2951 #define STORAGE_CMD_GET_SDR 0x23
2952 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
2953 unsigned long unused
,
2956 struct smi_info
*smi_info
= in
;
2957 unsigned char *data
= smi_info
->curr_msg
->data
;
2958 unsigned int size
= smi_info
->curr_msg
->data_size
;
2960 (data
[0]>>2) == STORAGE_NETFN
&&
2961 data
[1] == STORAGE_CMD_GET_SDR
&&
2963 return_hosed_msg_badsize(smi_info
);
2969 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
2970 .notifier_call
= dell_poweredge_bt_xaction_handler
,
2974 * setup_dell_poweredge_bt_xaction_handler
2975 * @info - smi_info.device_id must be filled in already
2977 * Fills in smi_info.device_id.start_transaction_pre_hook
2978 * when we know what function to use there.
2981 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
2983 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2984 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
2985 smi_info
->si_type
== SI_BT
)
2986 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
2990 * setup_oem_data_handler
2991 * @info - smi_info.device_id must be filled in already
2993 * Fills in smi_info.device_id.oem_data_available_handler
2994 * when we know what function to use there.
2997 static void setup_oem_data_handler(struct smi_info
*smi_info
)
2999 setup_dell_poweredge_oem_data_handler(smi_info
);
3002 static void setup_xaction_handlers(struct smi_info
*smi_info
)
3004 setup_dell_poweredge_bt_xaction_handler(smi_info
);
3007 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
3009 if (smi_info
->intf
) {
3011 * The timer and thread are only running if the
3012 * interface has been started up and registered.
3014 if (smi_info
->thread
!= NULL
)
3015 kthread_stop(smi_info
->thread
);
3016 del_timer_sync(&smi_info
->si_timer
);
3020 static __devinitdata
struct ipmi_default_vals
3026 { .type
= SI_KCS
, .port
= 0xca2 },
3027 { .type
= SI_SMIC
, .port
= 0xca9 },
3028 { .type
= SI_BT
, .port
= 0xe4 },
3032 static void __devinit
default_find_bmc(void)
3034 struct smi_info
*info
;
3037 for (i
= 0; ; i
++) {
3038 if (!ipmi_defaults
[i
].port
)
3041 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3044 info
= smi_info_alloc();
3048 info
->addr_source
= SI_DEFAULT
;
3050 info
->si_type
= ipmi_defaults
[i
].type
;
3051 info
->io_setup
= port_setup
;
3052 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3053 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3055 info
->io
.addr
= NULL
;
3056 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3057 info
->io
.regsize
= DEFAULT_REGSPACING
;
3058 info
->io
.regshift
= 0;
3060 if (add_smi(info
) == 0) {
3061 if ((try_smi_init(info
)) == 0) {
3063 printk(KERN_INFO PFX
"Found default %s"
3064 " state machine at %s address 0x%lx\n",
3065 si_to_str
[info
->si_type
],
3066 addr_space_to_str
[info
->io
.addr_type
],
3067 info
->io
.addr_data
);
3069 cleanup_one_si(info
);
3076 static int is_new_interface(struct smi_info
*info
)
3080 list_for_each_entry(e
, &smi_infos
, link
) {
3081 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3083 if (e
->io
.addr_data
== info
->io
.addr_data
)
3090 static int add_smi(struct smi_info
*new_smi
)
3094 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3095 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3096 si_to_str
[new_smi
->si_type
]);
3097 mutex_lock(&smi_infos_lock
);
3098 if (!is_new_interface(new_smi
)) {
3099 printk(KERN_CONT
" duplicate interface\n");
3104 printk(KERN_CONT
"\n");
3106 /* So we know not to free it unless we have allocated one. */
3107 new_smi
->intf
= NULL
;
3108 new_smi
->si_sm
= NULL
;
3109 new_smi
->handlers
= NULL
;
3111 list_add_tail(&new_smi
->link
, &smi_infos
);
3114 mutex_unlock(&smi_infos_lock
);
3118 static int try_smi_init(struct smi_info
*new_smi
)
3123 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3124 " machine at %s address 0x%lx, slave address 0x%x,"
3126 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3127 si_to_str
[new_smi
->si_type
],
3128 addr_space_to_str
[new_smi
->io
.addr_type
],
3129 new_smi
->io
.addr_data
,
3130 new_smi
->slave_addr
, new_smi
->irq
);
3132 switch (new_smi
->si_type
) {
3134 new_smi
->handlers
= &kcs_smi_handlers
;
3138 new_smi
->handlers
= &smic_smi_handlers
;
3142 new_smi
->handlers
= &bt_smi_handlers
;
3146 /* No support for anything else yet. */
3151 /* Allocate the state machine's data and initialize it. */
3152 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3153 if (!new_smi
->si_sm
) {
3155 "Could not allocate state machine memory\n");
3159 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3162 /* Now that we know the I/O size, we can set up the I/O. */
3163 rv
= new_smi
->io_setup(new_smi
);
3165 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3169 /* Do low-level detection first. */
3170 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3171 if (new_smi
->addr_source
)
3172 printk(KERN_INFO PFX
"Interface detection failed\n");
3178 * Attempt a get device id command. If it fails, we probably
3179 * don't have a BMC here.
3181 rv
= try_get_dev_id(new_smi
);
3183 if (new_smi
->addr_source
)
3184 printk(KERN_INFO PFX
"There appears to be no BMC"
3185 " at this location\n");
3189 setup_oem_data_handler(new_smi
);
3190 setup_xaction_handlers(new_smi
);
3192 INIT_LIST_HEAD(&(new_smi
->xmit_msgs
));
3193 INIT_LIST_HEAD(&(new_smi
->hp_xmit_msgs
));
3194 new_smi
->curr_msg
= NULL
;
3195 atomic_set(&new_smi
->req_events
, 0);
3196 new_smi
->run_to_completion
= 0;
3197 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3198 atomic_set(&new_smi
->stats
[i
], 0);
3200 new_smi
->interrupt_disabled
= 1;
3201 atomic_set(&new_smi
->stop_operation
, 0);
3202 new_smi
->intf_num
= smi_num
;
3205 rv
= try_enable_event_buffer(new_smi
);
3207 new_smi
->has_event_buffer
= 1;
3210 * Start clearing the flags before we enable interrupts or the
3211 * timer to avoid racing with the timer.
3213 start_clear_flags(new_smi
);
3214 /* IRQ is defined to be set when non-zero. */
3216 new_smi
->si_state
= SI_CLEARING_FLAGS_THEN_SET_IRQ
;
3218 if (!new_smi
->dev
) {
3220 * If we don't already have a device from something
3221 * else (like PCI), then register a new one.
3223 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3225 if (!new_smi
->pdev
) {
3227 "Unable to allocate platform device\n");
3230 new_smi
->dev
= &new_smi
->pdev
->dev
;
3231 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3233 rv
= platform_device_add(new_smi
->pdev
);
3236 "Unable to register system interface device:"
3241 new_smi
->dev_registered
= 1;
3244 rv
= ipmi_register_smi(&handlers
,
3246 &new_smi
->device_id
,
3249 new_smi
->slave_addr
);
3251 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3253 goto out_err_stop_timer
;
3256 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3257 type_file_read_proc
,
3260 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3261 goto out_err_stop_timer
;
3264 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3265 stat_file_read_proc
,
3268 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3269 goto out_err_stop_timer
;
3272 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3276 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3277 goto out_err_stop_timer
;
3280 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3281 si_to_str
[new_smi
->si_type
]);
3286 atomic_inc(&new_smi
->stop_operation
);
3287 wait_for_timer_and_thread(new_smi
);
3290 new_smi
->interrupt_disabled
= 1;
3292 if (new_smi
->intf
) {
3293 ipmi_unregister_smi(new_smi
->intf
);
3294 new_smi
->intf
= NULL
;
3297 if (new_smi
->irq_cleanup
) {
3298 new_smi
->irq_cleanup(new_smi
);
3299 new_smi
->irq_cleanup
= NULL
;
3303 * Wait until we know that we are out of any interrupt
3304 * handlers might have been running before we freed the
3307 synchronize_sched();
3309 if (new_smi
->si_sm
) {
3310 if (new_smi
->handlers
)
3311 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3312 kfree(new_smi
->si_sm
);
3313 new_smi
->si_sm
= NULL
;
3315 if (new_smi
->addr_source_cleanup
) {
3316 new_smi
->addr_source_cleanup(new_smi
);
3317 new_smi
->addr_source_cleanup
= NULL
;
3319 if (new_smi
->io_cleanup
) {
3320 new_smi
->io_cleanup(new_smi
);
3321 new_smi
->io_cleanup
= NULL
;
3324 if (new_smi
->dev_registered
) {
3325 platform_device_unregister(new_smi
->pdev
);
3326 new_smi
->dev_registered
= 0;
3332 static int __devinit
init_ipmi_si(void)
3338 enum ipmi_addr_src type
= SI_INVALID
;
3344 rv
= platform_driver_register(&ipmi_driver
);
3346 printk(KERN_ERR PFX
"Unable to register driver: %d\n", rv
);
3351 /* Parse out the si_type string into its components. */
3354 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3356 str
= strchr(str
, ',');
3366 printk(KERN_INFO
"IPMI System Interface driver.\n");
3368 /* If the user gave us a device, they presumably want us to use it */
3369 if (!hardcode_find_bmc())
3373 rv
= pci_register_driver(&ipmi_pci_driver
);
3375 printk(KERN_ERR PFX
"Unable to register PCI driver: %d\n", rv
);
3381 pnp_register_driver(&ipmi_pnp_driver
);
3393 /* We prefer devices with interrupts, but in the case of a machine
3394 with multiple BMCs we assume that there will be several instances
3395 of a given type so if we succeed in registering a type then also
3396 try to register everything else of the same type */
3398 mutex_lock(&smi_infos_lock
);
3399 list_for_each_entry(e
, &smi_infos
, link
) {
3400 /* Try to register a device if it has an IRQ and we either
3401 haven't successfully registered a device yet or this
3402 device has the same type as one we successfully registered */
3403 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3404 if (!try_smi_init(e
)) {
3405 type
= e
->addr_source
;
3410 /* type will only have been set if we successfully registered an si */
3412 mutex_unlock(&smi_infos_lock
);
3416 /* Fall back to the preferred device */
3418 list_for_each_entry(e
, &smi_infos
, link
) {
3419 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3420 if (!try_smi_init(e
)) {
3421 type
= e
->addr_source
;
3425 mutex_unlock(&smi_infos_lock
);
3430 if (si_trydefaults
) {
3431 mutex_lock(&smi_infos_lock
);
3432 if (list_empty(&smi_infos
)) {
3433 /* No BMC was found, try defaults. */
3434 mutex_unlock(&smi_infos_lock
);
3437 mutex_unlock(&smi_infos_lock
);
3440 mutex_lock(&smi_infos_lock
);
3441 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3442 mutex_unlock(&smi_infos_lock
);
3444 printk(KERN_WARNING PFX
3445 "Unable to find any System Interface(s)\n");
3448 mutex_unlock(&smi_infos_lock
);
3452 module_init(init_ipmi_si
);
3454 static void cleanup_one_si(struct smi_info
*to_clean
)
3457 unsigned long flags
;
3462 list_del(&to_clean
->link
);
3464 /* Tell the driver that we are shutting down. */
3465 atomic_inc(&to_clean
->stop_operation
);
3468 * Make sure the timer and thread are stopped and will not run
3471 wait_for_timer_and_thread(to_clean
);
3474 * Timeouts are stopped, now make sure the interrupts are off
3475 * for the device. A little tricky with locks to make sure
3476 * there are no races.
3478 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3479 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3480 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3482 schedule_timeout_uninterruptible(1);
3483 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3485 disable_si_irq(to_clean
);
3486 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3487 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3489 schedule_timeout_uninterruptible(1);
3492 /* Clean up interrupts and make sure that everything is done. */
3493 if (to_clean
->irq_cleanup
)
3494 to_clean
->irq_cleanup(to_clean
);
3495 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3497 schedule_timeout_uninterruptible(1);
3501 rv
= ipmi_unregister_smi(to_clean
->intf
);
3504 printk(KERN_ERR PFX
"Unable to unregister device: errno=%d\n",
3508 if (to_clean
->handlers
)
3509 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3511 kfree(to_clean
->si_sm
);
3513 if (to_clean
->addr_source_cleanup
)
3514 to_clean
->addr_source_cleanup(to_clean
);
3515 if (to_clean
->io_cleanup
)
3516 to_clean
->io_cleanup(to_clean
);
3518 if (to_clean
->dev_registered
)
3519 platform_device_unregister(to_clean
->pdev
);
3524 static void cleanup_ipmi_si(void)
3526 struct smi_info
*e
, *tmp_e
;
3533 pci_unregister_driver(&ipmi_pci_driver
);
3537 pnp_unregister_driver(&ipmi_pnp_driver
);
3540 platform_driver_unregister(&ipmi_driver
);
3542 mutex_lock(&smi_infos_lock
);
3543 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3545 mutex_unlock(&smi_infos_lock
);
3547 module_exit(cleanup_ipmi_si
);
3549 MODULE_LICENSE("GPL");
3550 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3551 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3552 " system interfaces.");