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 <linux/sched.h>
45 #include <linux/seq_file.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/dmi.h>
65 #include <linux/string.h>
66 #include <linux/ctype.h>
67 #include <linux/of_device.h>
68 #include <linux/of_platform.h>
69 #include <linux/of_address.h>
70 #include <linux/of_irq.h>
73 #include <asm/hardware.h> /* for register_parisc_driver() stuff */
74 #include <asm/parisc-device.h>
77 #define PFX "ipmi_si: "
79 /* Measure times between events in the driver. */
82 /* Call every 10 ms. */
83 #define SI_TIMEOUT_TIME_USEC 10000
84 #define SI_USEC_PER_JIFFY (1000000/HZ)
85 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
86 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
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 #define DEVICE_NAME "ipmi_si"
112 static struct platform_driver ipmi_driver
;
115 * Indexes into stats[] in smi_info below.
117 enum si_stat_indexes
{
119 * Number of times the driver requested a timer while an operation
122 SI_STAT_short_timeouts
= 0,
125 * Number of times the driver requested a timer while nothing was in
128 SI_STAT_long_timeouts
,
130 /* Number of times the interface was idle while being polled. */
133 /* Number of interrupts the driver handled. */
136 /* Number of time the driver got an ATTN from the hardware. */
139 /* Number of times the driver requested flags from the hardware. */
140 SI_STAT_flag_fetches
,
142 /* Number of times the hardware didn't follow the state machine. */
145 /* Number of completed messages. */
146 SI_STAT_complete_transactions
,
148 /* Number of IPMI events received from the hardware. */
151 /* Number of watchdog pretimeouts. */
152 SI_STAT_watchdog_pretimeouts
,
154 /* Number of asynchronous messages received. */
155 SI_STAT_incoming_messages
,
158 /* This *must* remain last, add new values above this. */
165 struct si_sm_data
*si_sm
;
166 const struct si_sm_handlers
*handlers
;
167 enum si_type si_type
;
169 struct ipmi_smi_msg
*waiting_msg
;
170 struct ipmi_smi_msg
*curr_msg
;
171 enum si_intf_state si_state
;
174 * Used to handle the various types of I/O that can occur with
178 int (*io_setup
)(struct smi_info
*info
);
179 void (*io_cleanup
)(struct smi_info
*info
);
180 int (*irq_setup
)(struct smi_info
*info
);
181 void (*irq_cleanup
)(struct smi_info
*info
);
182 unsigned int io_size
;
183 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
184 void (*addr_source_cleanup
)(struct smi_info
*info
);
185 void *addr_source_data
;
188 * Per-OEM handler, called from handle_flags(). Returns 1
189 * when handle_flags() needs to be re-run or 0 indicating it
190 * set si_state itself.
192 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
195 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
196 * is set to hold the flags until we are done handling everything
199 #define RECEIVE_MSG_AVAIL 0x01
200 #define EVENT_MSG_BUFFER_FULL 0x02
201 #define WDT_PRE_TIMEOUT_INT 0x08
202 #define OEM0_DATA_AVAIL 0x20
203 #define OEM1_DATA_AVAIL 0x40
204 #define OEM2_DATA_AVAIL 0x80
205 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
208 unsigned char msg_flags
;
210 /* Does the BMC have an event buffer? */
211 bool has_event_buffer
;
214 * If set to true, this will request events the next time the
215 * state machine is idle.
220 * If true, run the state machine to completion on every send
221 * call. Generally used after a panic to make sure stuff goes
224 bool run_to_completion
;
226 /* The I/O port of an SI interface. */
230 * The space between start addresses of the two ports. For
231 * instance, if the first port is 0xca2 and the spacing is 4, then
232 * the second port is 0xca6.
234 unsigned int spacing
;
236 /* zero if no irq; */
239 /* The timer for this si. */
240 struct timer_list si_timer
;
242 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
245 /* The time (in jiffies) the last timeout occurred at. */
246 unsigned long last_timeout_jiffies
;
248 /* Are we waiting for the events, pretimeouts, received msgs? */
252 * The driver will disable interrupts when it gets into a
253 * situation where it cannot handle messages due to lack of
254 * memory. Once that situation clears up, it will re-enable
257 bool interrupt_disabled
;
260 * Does the BMC support events?
262 bool supports_event_msg_buff
;
265 * Can we disable interrupts the global enables receive irq
266 * bit? There are currently two forms of brokenness, some
267 * systems cannot disable the bit (which is technically within
268 * the spec but a bad idea) and some systems have the bit
269 * forced to zero even though interrupts work (which is
270 * clearly outside the spec). The next bool tells which form
271 * of brokenness is present.
273 bool cannot_disable_irq
;
276 * Some systems are broken and cannot set the irq enable
277 * bit, even if they support interrupts.
279 bool irq_enable_broken
;
282 * Did we get an attention that we did not handle?
286 /* From the get device id response... */
287 struct ipmi_device_id device_id
;
289 /* Driver model stuff. */
291 struct platform_device
*pdev
;
294 * True if we allocated the device, false if it came from
295 * someplace else (like PCI).
299 /* Slave address, could be reported from DMI. */
300 unsigned char slave_addr
;
302 /* Counters and things for the proc filesystem. */
303 atomic_t stats
[SI_NUM_STATS
];
305 struct task_struct
*thread
;
307 struct list_head link
;
308 union ipmi_smi_info_union addr_info
;
311 #define smi_inc_stat(smi, stat) \
312 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
313 #define smi_get_stat(smi, stat) \
314 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
316 #define SI_MAX_PARMS 4
318 static int force_kipmid
[SI_MAX_PARMS
];
319 static int num_force_kipmid
;
321 static bool pci_registered
;
324 static bool parisc_registered
;
327 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
328 static int num_max_busy_us
;
330 static bool unload_when_empty
= true;
332 static int add_smi(struct smi_info
*smi
);
333 static int try_smi_init(struct smi_info
*smi
);
334 static void cleanup_one_si(struct smi_info
*to_clean
);
335 static void cleanup_ipmi_si(void);
338 void debug_timestamp(char *msg
)
342 getnstimeofday64(&t
);
343 pr_debug("**%s: %lld.%9.9ld\n", msg
, (long long) t
.tv_sec
, t
.tv_nsec
);
346 #define debug_timestamp(x)
349 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
350 static int register_xaction_notifier(struct notifier_block
*nb
)
352 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
355 static void deliver_recv_msg(struct smi_info
*smi_info
,
356 struct ipmi_smi_msg
*msg
)
358 /* Deliver the message to the upper layer. */
360 ipmi_smi_msg_received(smi_info
->intf
, msg
);
362 ipmi_free_smi_msg(msg
);
365 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
367 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
369 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
370 cCode
= IPMI_ERR_UNSPECIFIED
;
371 /* else use it as is */
373 /* Make it a response */
374 msg
->rsp
[0] = msg
->data
[0] | 4;
375 msg
->rsp
[1] = msg
->data
[1];
379 smi_info
->curr_msg
= NULL
;
380 deliver_recv_msg(smi_info
, msg
);
383 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
387 if (!smi_info
->waiting_msg
) {
388 smi_info
->curr_msg
= NULL
;
393 smi_info
->curr_msg
= smi_info
->waiting_msg
;
394 smi_info
->waiting_msg
= NULL
;
395 debug_timestamp("Start2");
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
;
415 static void start_check_enables(struct smi_info
*smi_info
)
417 unsigned char msg
[2];
419 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
420 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
422 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
423 smi_info
->si_state
= SI_CHECKING_ENABLES
;
426 static void start_clear_flags(struct smi_info
*smi_info
)
428 unsigned char msg
[3];
430 /* Make sure the watchdog pre-timeout flag is not set at startup. */
431 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
432 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
433 msg
[2] = WDT_PRE_TIMEOUT_INT
;
435 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
436 smi_info
->si_state
= SI_CLEARING_FLAGS
;
439 static void start_getting_msg_queue(struct smi_info
*smi_info
)
441 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
442 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
443 smi_info
->curr_msg
->data_size
= 2;
445 smi_info
->handlers
->start_transaction(
447 smi_info
->curr_msg
->data
,
448 smi_info
->curr_msg
->data_size
);
449 smi_info
->si_state
= SI_GETTING_MESSAGES
;
452 static void start_getting_events(struct smi_info
*smi_info
)
454 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
455 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
456 smi_info
->curr_msg
->data_size
= 2;
458 smi_info
->handlers
->start_transaction(
460 smi_info
->curr_msg
->data
,
461 smi_info
->curr_msg
->data_size
);
462 smi_info
->si_state
= SI_GETTING_EVENTS
;
465 static void smi_mod_timer(struct smi_info
*smi_info
, unsigned long new_val
)
467 smi_info
->last_timeout_jiffies
= jiffies
;
468 mod_timer(&smi_info
->si_timer
, new_val
);
469 smi_info
->timer_running
= true;
473 * When we have a situtaion where we run out of memory and cannot
474 * allocate messages, we just leave them in the BMC and run the system
475 * polled until we can allocate some memory. Once we have some
476 * memory, we will re-enable the interrupt.
478 * Note that we cannot just use disable_irq(), since the interrupt may
481 static inline bool disable_si_irq(struct smi_info
*smi_info
)
483 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
484 smi_info
->interrupt_disabled
= true;
485 start_check_enables(smi_info
);
491 static inline bool enable_si_irq(struct smi_info
*smi_info
)
493 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
494 smi_info
->interrupt_disabled
= false;
495 start_check_enables(smi_info
);
502 * Allocate a message. If unable to allocate, start the interrupt
503 * disable process and return NULL. If able to allocate but
504 * interrupts are disabled, free the message and return NULL after
505 * starting the interrupt enable process.
507 static struct ipmi_smi_msg
*alloc_msg_handle_irq(struct smi_info
*smi_info
)
509 struct ipmi_smi_msg
*msg
;
511 msg
= ipmi_alloc_smi_msg();
513 if (!disable_si_irq(smi_info
))
514 smi_info
->si_state
= SI_NORMAL
;
515 } else if (enable_si_irq(smi_info
)) {
516 ipmi_free_smi_msg(msg
);
522 static void handle_flags(struct smi_info
*smi_info
)
525 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
526 /* Watchdog pre-timeout */
527 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
529 start_clear_flags(smi_info
);
530 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
532 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
533 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
534 /* Messages available. */
535 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
536 if (!smi_info
->curr_msg
)
539 start_getting_msg_queue(smi_info
);
540 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
541 /* Events available. */
542 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
543 if (!smi_info
->curr_msg
)
546 start_getting_events(smi_info
);
547 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
548 smi_info
->oem_data_avail_handler
) {
549 if (smi_info
->oem_data_avail_handler(smi_info
))
552 smi_info
->si_state
= SI_NORMAL
;
556 * Global enables we care about.
558 #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
559 IPMI_BMC_EVT_MSG_INTR)
561 static u8
current_global_enables(struct smi_info
*smi_info
, u8 base
,
566 if (smi_info
->supports_event_msg_buff
)
567 enables
|= IPMI_BMC_EVT_MSG_BUFF
;
569 if (((smi_info
->irq
&& !smi_info
->interrupt_disabled
) ||
570 smi_info
->cannot_disable_irq
) &&
571 !smi_info
->irq_enable_broken
)
572 enables
|= IPMI_BMC_RCV_MSG_INTR
;
574 if (smi_info
->supports_event_msg_buff
&&
575 smi_info
->irq
&& !smi_info
->interrupt_disabled
&&
576 !smi_info
->irq_enable_broken
)
577 enables
|= IPMI_BMC_EVT_MSG_INTR
;
579 *irq_on
= enables
& (IPMI_BMC_EVT_MSG_INTR
| IPMI_BMC_RCV_MSG_INTR
);
584 static void check_bt_irq(struct smi_info
*smi_info
, bool irq_on
)
586 u8 irqstate
= smi_info
->io
.inputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
);
588 irqstate
&= IPMI_BT_INTMASK_ENABLE_IRQ_BIT
;
590 if ((bool)irqstate
== irq_on
)
594 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
595 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
597 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
, 0);
600 static void handle_transaction_done(struct smi_info
*smi_info
)
602 struct ipmi_smi_msg
*msg
;
604 debug_timestamp("Done");
605 switch (smi_info
->si_state
) {
607 if (!smi_info
->curr_msg
)
610 smi_info
->curr_msg
->rsp_size
611 = smi_info
->handlers
->get_result(
613 smi_info
->curr_msg
->rsp
,
614 IPMI_MAX_MSG_LENGTH
);
617 * Do this here becase deliver_recv_msg() releases the
618 * lock, and a new message can be put in during the
619 * time the lock is released.
621 msg
= smi_info
->curr_msg
;
622 smi_info
->curr_msg
= NULL
;
623 deliver_recv_msg(smi_info
, msg
);
626 case SI_GETTING_FLAGS
:
628 unsigned char msg
[4];
631 /* We got the flags from the SMI, now handle them. */
632 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
634 /* Error fetching flags, just give up for now. */
635 smi_info
->si_state
= SI_NORMAL
;
636 } else if (len
< 4) {
638 * Hmm, no flags. That's technically illegal, but
639 * don't use uninitialized data.
641 smi_info
->si_state
= SI_NORMAL
;
643 smi_info
->msg_flags
= msg
[3];
644 handle_flags(smi_info
);
649 case SI_CLEARING_FLAGS
:
651 unsigned char msg
[3];
653 /* We cleared the flags. */
654 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
656 /* Error clearing flags */
657 dev_warn(smi_info
->dev
,
658 "Error clearing flags: %2.2x\n", msg
[2]);
660 smi_info
->si_state
= SI_NORMAL
;
664 case SI_GETTING_EVENTS
:
666 smi_info
->curr_msg
->rsp_size
667 = smi_info
->handlers
->get_result(
669 smi_info
->curr_msg
->rsp
,
670 IPMI_MAX_MSG_LENGTH
);
673 * Do this here becase deliver_recv_msg() releases the
674 * lock, and a new message can be put in during the
675 * time the lock is released.
677 msg
= smi_info
->curr_msg
;
678 smi_info
->curr_msg
= NULL
;
679 if (msg
->rsp
[2] != 0) {
680 /* Error getting event, probably done. */
683 /* Take off the event flag. */
684 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
685 handle_flags(smi_info
);
687 smi_inc_stat(smi_info
, events
);
690 * Do this before we deliver the message
691 * because delivering the message releases the
692 * lock and something else can mess with the
695 handle_flags(smi_info
);
697 deliver_recv_msg(smi_info
, msg
);
702 case SI_GETTING_MESSAGES
:
704 smi_info
->curr_msg
->rsp_size
705 = smi_info
->handlers
->get_result(
707 smi_info
->curr_msg
->rsp
,
708 IPMI_MAX_MSG_LENGTH
);
711 * Do this here becase deliver_recv_msg() releases the
712 * lock, and a new message can be put in during the
713 * time the lock is released.
715 msg
= smi_info
->curr_msg
;
716 smi_info
->curr_msg
= NULL
;
717 if (msg
->rsp
[2] != 0) {
718 /* Error getting event, probably done. */
721 /* Take off the msg flag. */
722 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
723 handle_flags(smi_info
);
725 smi_inc_stat(smi_info
, incoming_messages
);
728 * Do this before we deliver the message
729 * because delivering the message releases the
730 * lock and something else can mess with the
733 handle_flags(smi_info
);
735 deliver_recv_msg(smi_info
, msg
);
740 case SI_CHECKING_ENABLES
:
742 unsigned char msg
[4];
746 /* We got the flags from the SMI, now handle them. */
747 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
749 dev_warn(smi_info
->dev
,
750 "Couldn't get irq info: %x.\n", msg
[2]);
751 dev_warn(smi_info
->dev
,
752 "Maybe ok, but ipmi might run very slowly.\n");
753 smi_info
->si_state
= SI_NORMAL
;
756 enables
= current_global_enables(smi_info
, 0, &irq_on
);
757 if (smi_info
->si_type
== SI_BT
)
758 /* BT has its own interrupt enable bit. */
759 check_bt_irq(smi_info
, irq_on
);
760 if (enables
!= (msg
[3] & GLOBAL_ENABLES_MASK
)) {
761 /* Enables are not correct, fix them. */
762 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
763 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
764 msg
[2] = enables
| (msg
[3] & ~GLOBAL_ENABLES_MASK
);
765 smi_info
->handlers
->start_transaction(
766 smi_info
->si_sm
, msg
, 3);
767 smi_info
->si_state
= SI_SETTING_ENABLES
;
768 } else if (smi_info
->supports_event_msg_buff
) {
769 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
770 if (!smi_info
->curr_msg
) {
771 smi_info
->si_state
= SI_NORMAL
;
774 start_getting_msg_queue(smi_info
);
776 smi_info
->si_state
= SI_NORMAL
;
781 case SI_SETTING_ENABLES
:
783 unsigned char msg
[4];
785 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
787 dev_warn(smi_info
->dev
,
788 "Could not set the global enables: 0x%x.\n",
791 if (smi_info
->supports_event_msg_buff
) {
792 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
793 if (!smi_info
->curr_msg
) {
794 smi_info
->si_state
= SI_NORMAL
;
797 start_getting_msg_queue(smi_info
);
799 smi_info
->si_state
= SI_NORMAL
;
807 * Called on timeouts and events. Timeouts should pass the elapsed
808 * time, interrupts should pass in zero. Must be called with
809 * si_lock held and interrupts disabled.
811 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
814 enum si_sm_result si_sm_result
;
818 * There used to be a loop here that waited a little while
819 * (around 25us) before giving up. That turned out to be
820 * pointless, the minimum delays I was seeing were in the 300us
821 * range, which is far too long to wait in an interrupt. So
822 * we just run until the state machine tells us something
823 * happened or it needs a delay.
825 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
827 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
828 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
830 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
831 smi_inc_stat(smi_info
, complete_transactions
);
833 handle_transaction_done(smi_info
);
834 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
835 } else if (si_sm_result
== SI_SM_HOSED
) {
836 smi_inc_stat(smi_info
, hosed_count
);
839 * Do the before return_hosed_msg, because that
842 smi_info
->si_state
= SI_NORMAL
;
843 if (smi_info
->curr_msg
!= NULL
) {
845 * If we were handling a user message, format
846 * a response to send to the upper layer to
847 * tell it about the error.
849 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
851 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
855 * We prefer handling attn over new messages. But don't do
856 * this if there is not yet an upper layer to handle anything.
858 if (likely(smi_info
->intf
) &&
859 (si_sm_result
== SI_SM_ATTN
|| smi_info
->got_attn
)) {
860 unsigned char msg
[2];
862 if (smi_info
->si_state
!= SI_NORMAL
) {
864 * We got an ATTN, but we are doing something else.
865 * Handle the ATTN later.
867 smi_info
->got_attn
= true;
869 smi_info
->got_attn
= false;
870 smi_inc_stat(smi_info
, attentions
);
873 * Got a attn, send down a get message flags to see
874 * what's causing it. It would be better to handle
875 * this in the upper layer, but due to the way
876 * interrupts work with the SMI, that's not really
879 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
880 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
882 smi_info
->handlers
->start_transaction(
883 smi_info
->si_sm
, msg
, 2);
884 smi_info
->si_state
= SI_GETTING_FLAGS
;
889 /* If we are currently idle, try to start the next message. */
890 if (si_sm_result
== SI_SM_IDLE
) {
891 smi_inc_stat(smi_info
, idles
);
893 si_sm_result
= start_next_msg(smi_info
);
894 if (si_sm_result
!= SI_SM_IDLE
)
898 if ((si_sm_result
== SI_SM_IDLE
)
899 && (atomic_read(&smi_info
->req_events
))) {
901 * We are idle and the upper layer requested that I fetch
904 atomic_set(&smi_info
->req_events
, 0);
907 * Take this opportunity to check the interrupt and
908 * message enable state for the BMC. The BMC can be
909 * asynchronously reset, and may thus get interrupts
910 * disable and messages disabled.
912 if (smi_info
->supports_event_msg_buff
|| smi_info
->irq
) {
913 start_check_enables(smi_info
);
915 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
916 if (!smi_info
->curr_msg
)
919 start_getting_events(smi_info
);
927 static void check_start_timer_thread(struct smi_info
*smi_info
)
929 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
) {
930 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
932 if (smi_info
->thread
)
933 wake_up_process(smi_info
->thread
);
935 start_next_msg(smi_info
);
936 smi_event_handler(smi_info
, 0);
940 static void flush_messages(void *send_info
)
942 struct smi_info
*smi_info
= send_info
;
943 enum si_sm_result result
;
946 * Currently, this function is called only in run-to-completion
947 * mode. This means we are single-threaded, no need for locks.
949 result
= smi_event_handler(smi_info
, 0);
950 while (result
!= SI_SM_IDLE
) {
951 udelay(SI_SHORT_TIMEOUT_USEC
);
952 result
= smi_event_handler(smi_info
, SI_SHORT_TIMEOUT_USEC
);
956 static void sender(void *send_info
,
957 struct ipmi_smi_msg
*msg
)
959 struct smi_info
*smi_info
= send_info
;
962 debug_timestamp("Enqueue");
964 if (smi_info
->run_to_completion
) {
966 * If we are running to completion, start it. Upper
967 * layer will call flush_messages to clear it out.
969 smi_info
->waiting_msg
= msg
;
973 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
975 * The following two lines don't need to be under the lock for
976 * the lock's sake, but they do need SMP memory barriers to
977 * avoid getting things out of order. We are already claiming
978 * the lock, anyway, so just do it under the lock to avoid the
981 BUG_ON(smi_info
->waiting_msg
);
982 smi_info
->waiting_msg
= msg
;
983 check_start_timer_thread(smi_info
);
984 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
987 static void set_run_to_completion(void *send_info
, bool i_run_to_completion
)
989 struct smi_info
*smi_info
= send_info
;
991 smi_info
->run_to_completion
= i_run_to_completion
;
992 if (i_run_to_completion
)
993 flush_messages(smi_info
);
997 * Use -1 in the nsec value of the busy waiting timespec to tell that
998 * we are spinning in kipmid looking for something and not delaying
1001 static inline void ipmi_si_set_not_busy(struct timespec64
*ts
)
1005 static inline int ipmi_si_is_busy(struct timespec64
*ts
)
1007 return ts
->tv_nsec
!= -1;
1010 static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result
,
1011 const struct smi_info
*smi_info
,
1012 struct timespec64
*busy_until
)
1014 unsigned int max_busy_us
= 0;
1016 if (smi_info
->intf_num
< num_max_busy_us
)
1017 max_busy_us
= kipmid_max_busy_us
[smi_info
->intf_num
];
1018 if (max_busy_us
== 0 || smi_result
!= SI_SM_CALL_WITH_DELAY
)
1019 ipmi_si_set_not_busy(busy_until
);
1020 else if (!ipmi_si_is_busy(busy_until
)) {
1021 getnstimeofday64(busy_until
);
1022 timespec64_add_ns(busy_until
, max_busy_us
*NSEC_PER_USEC
);
1024 struct timespec64 now
;
1026 getnstimeofday64(&now
);
1027 if (unlikely(timespec64_compare(&now
, busy_until
) > 0)) {
1028 ipmi_si_set_not_busy(busy_until
);
1037 * A busy-waiting loop for speeding up IPMI operation.
1039 * Lousy hardware makes this hard. This is only enabled for systems
1040 * that are not BT and do not have interrupts. It starts spinning
1041 * when an operation is complete or until max_busy tells it to stop
1042 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1043 * Documentation/IPMI.txt for details.
1045 static int ipmi_thread(void *data
)
1047 struct smi_info
*smi_info
= data
;
1048 unsigned long flags
;
1049 enum si_sm_result smi_result
;
1050 struct timespec64 busy_until
;
1052 ipmi_si_set_not_busy(&busy_until
);
1053 set_user_nice(current
, MAX_NICE
);
1054 while (!kthread_should_stop()) {
1057 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1058 smi_result
= smi_event_handler(smi_info
, 0);
1061 * If the driver is doing something, there is a possible
1062 * race with the timer. If the timer handler see idle,
1063 * and the thread here sees something else, the timer
1064 * handler won't restart the timer even though it is
1065 * required. So start it here if necessary.
1067 if (smi_result
!= SI_SM_IDLE
&& !smi_info
->timer_running
)
1068 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1070 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1071 busy_wait
= ipmi_thread_busy_wait(smi_result
, smi_info
,
1073 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
1075 else if (smi_result
== SI_SM_CALL_WITH_DELAY
&& busy_wait
)
1077 else if (smi_result
== SI_SM_IDLE
) {
1078 if (atomic_read(&smi_info
->need_watch
)) {
1079 schedule_timeout_interruptible(100);
1081 /* Wait to be woken up when we are needed. */
1082 __set_current_state(TASK_INTERRUPTIBLE
);
1086 schedule_timeout_interruptible(1);
1092 static void poll(void *send_info
)
1094 struct smi_info
*smi_info
= send_info
;
1095 unsigned long flags
= 0;
1096 bool run_to_completion
= smi_info
->run_to_completion
;
1099 * Make sure there is some delay in the poll loop so we can
1100 * drive time forward and timeout things.
1103 if (!run_to_completion
)
1104 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1105 smi_event_handler(smi_info
, 10);
1106 if (!run_to_completion
)
1107 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1110 static void request_events(void *send_info
)
1112 struct smi_info
*smi_info
= send_info
;
1114 if (!smi_info
->has_event_buffer
)
1117 atomic_set(&smi_info
->req_events
, 1);
1120 static void set_need_watch(void *send_info
, bool enable
)
1122 struct smi_info
*smi_info
= send_info
;
1123 unsigned long flags
;
1125 atomic_set(&smi_info
->need_watch
, enable
);
1126 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1127 check_start_timer_thread(smi_info
);
1128 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1131 static int initialized
;
1133 static void smi_timeout(unsigned long data
)
1135 struct smi_info
*smi_info
= (struct smi_info
*) data
;
1136 enum si_sm_result smi_result
;
1137 unsigned long flags
;
1138 unsigned long jiffies_now
;
1142 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1143 debug_timestamp("Timer");
1145 jiffies_now
= jiffies
;
1146 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
1147 * SI_USEC_PER_JIFFY
);
1148 smi_result
= smi_event_handler(smi_info
, time_diff
);
1150 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1151 /* Running with interrupts, only do long timeouts. */
1152 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1153 smi_inc_stat(smi_info
, long_timeouts
);
1158 * If the state machine asks for a short delay, then shorten
1159 * the timer timeout.
1161 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1162 smi_inc_stat(smi_info
, short_timeouts
);
1163 timeout
= jiffies
+ 1;
1165 smi_inc_stat(smi_info
, long_timeouts
);
1166 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1170 if (smi_result
!= SI_SM_IDLE
)
1171 smi_mod_timer(smi_info
, timeout
);
1173 smi_info
->timer_running
= false;
1174 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1177 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1179 struct smi_info
*smi_info
= data
;
1180 unsigned long flags
;
1182 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1184 smi_inc_stat(smi_info
, interrupts
);
1186 debug_timestamp("Interrupt");
1188 smi_event_handler(smi_info
, 0);
1189 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1193 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1195 struct smi_info
*smi_info
= data
;
1196 /* We need to clear the IRQ flag for the BT interface. */
1197 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1198 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1199 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1200 return si_irq_handler(irq
, data
);
1203 static int smi_start_processing(void *send_info
,
1206 struct smi_info
*new_smi
= send_info
;
1209 new_smi
->intf
= intf
;
1211 /* Try to claim any interrupts. */
1212 if (new_smi
->irq_setup
)
1213 new_smi
->irq_setup(new_smi
);
1215 /* Set up the timer that drives the interface. */
1216 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1217 smi_mod_timer(new_smi
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1220 * Check if the user forcefully enabled the daemon.
1222 if (new_smi
->intf_num
< num_force_kipmid
)
1223 enable
= force_kipmid
[new_smi
->intf_num
];
1225 * The BT interface is efficient enough to not need a thread,
1226 * and there is no need for a thread if we have interrupts.
1228 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1232 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1233 "kipmi%d", new_smi
->intf_num
);
1234 if (IS_ERR(new_smi
->thread
)) {
1235 dev_notice(new_smi
->dev
, "Could not start"
1236 " kernel thread due to error %ld, only using"
1237 " timers to drive the interface\n",
1238 PTR_ERR(new_smi
->thread
));
1239 new_smi
->thread
= NULL
;
1246 static int get_smi_info(void *send_info
, struct ipmi_smi_info
*data
)
1248 struct smi_info
*smi
= send_info
;
1250 data
->addr_src
= smi
->addr_source
;
1251 data
->dev
= smi
->dev
;
1252 data
->addr_info
= smi
->addr_info
;
1253 get_device(smi
->dev
);
1258 static void set_maintenance_mode(void *send_info
, bool enable
)
1260 struct smi_info
*smi_info
= send_info
;
1263 atomic_set(&smi_info
->req_events
, 0);
1266 static const struct ipmi_smi_handlers handlers
= {
1267 .owner
= THIS_MODULE
,
1268 .start_processing
= smi_start_processing
,
1269 .get_smi_info
= get_smi_info
,
1271 .request_events
= request_events
,
1272 .set_need_watch
= set_need_watch
,
1273 .set_maintenance_mode
= set_maintenance_mode
,
1274 .set_run_to_completion
= set_run_to_completion
,
1275 .flush_messages
= flush_messages
,
1280 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1281 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1284 static LIST_HEAD(smi_infos
);
1285 static DEFINE_MUTEX(smi_infos_lock
);
1286 static int smi_num
; /* Used to sequence the SMIs */
1288 #define DEFAULT_REGSPACING 1
1289 #define DEFAULT_REGSIZE 1
1292 static bool si_tryacpi
= true;
1295 static bool si_trydmi
= true;
1297 static bool si_tryplatform
= true;
1299 static bool si_trypci
= true;
1301 static bool si_trydefaults
= IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS
);
1302 static char *si_type
[SI_MAX_PARMS
];
1303 #define MAX_SI_TYPE_STR 30
1304 static char si_type_str
[MAX_SI_TYPE_STR
];
1305 static unsigned long addrs
[SI_MAX_PARMS
];
1306 static unsigned int num_addrs
;
1307 static unsigned int ports
[SI_MAX_PARMS
];
1308 static unsigned int num_ports
;
1309 static int irqs
[SI_MAX_PARMS
];
1310 static unsigned int num_irqs
;
1311 static int regspacings
[SI_MAX_PARMS
];
1312 static unsigned int num_regspacings
;
1313 static int regsizes
[SI_MAX_PARMS
];
1314 static unsigned int num_regsizes
;
1315 static int regshifts
[SI_MAX_PARMS
];
1316 static unsigned int num_regshifts
;
1317 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1318 static unsigned int num_slave_addrs
;
1320 #define IPMI_IO_ADDR_SPACE 0
1321 #define IPMI_MEM_ADDR_SPACE 1
1322 static char *addr_space_to_str
[] = { "i/o", "mem" };
1324 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1326 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1327 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1328 " Documentation/IPMI.txt in the kernel sources for the"
1332 module_param_named(tryacpi
, si_tryacpi
, bool, 0);
1333 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1334 " default scan of the interfaces identified via ACPI");
1337 module_param_named(trydmi
, si_trydmi
, bool, 0);
1338 MODULE_PARM_DESC(trydmi
, "Setting this to zero will disable the"
1339 " default scan of the interfaces identified via DMI");
1341 module_param_named(tryplatform
, si_tryplatform
, bool, 0);
1342 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1343 " default scan of the interfaces identified via platform"
1344 " interfaces like openfirmware");
1346 module_param_named(trypci
, si_trypci
, bool, 0);
1347 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1348 " default scan of the interfaces identified via pci");
1350 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1351 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1352 " default scan of the KCS and SMIC interface at the standard"
1354 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1355 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1356 " interface separated by commas. The types are 'kcs',"
1357 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1358 " the first interface to kcs and the second to bt");
1359 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1360 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1361 " addresses separated by commas. Only use if an interface"
1362 " is in memory. Otherwise, set it to zero or leave"
1364 module_param_array(ports
, uint
, &num_ports
, 0);
1365 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1366 " addresses separated by commas. Only use if an interface"
1367 " is a port. Otherwise, set it to zero or leave"
1369 module_param_array(irqs
, int, &num_irqs
, 0);
1370 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1371 " addresses separated by commas. Only use if an interface"
1372 " has an interrupt. Otherwise, set it to zero or leave"
1374 module_param_array(regspacings
, int, &num_regspacings
, 0);
1375 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1376 " and each successive register used by the interface. For"
1377 " instance, if the start address is 0xca2 and the spacing"
1378 " is 2, then the second address is at 0xca4. Defaults"
1380 module_param_array(regsizes
, int, &num_regsizes
, 0);
1381 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1382 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1383 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1384 " the 8-bit IPMI register has to be read from a larger"
1386 module_param_array(regshifts
, int, &num_regshifts
, 0);
1387 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1388 " IPMI register, in bits. For instance, if the data"
1389 " is read from a 32-bit word and the IPMI data is in"
1390 " bit 8-15, then the shift would be 8");
1391 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1392 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1393 " the controller. Normally this is 0x20, but can be"
1394 " overridden by this parm. This is an array indexed"
1395 " by interface number.");
1396 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1397 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1398 " disabled(0). Normally the IPMI driver auto-detects"
1399 " this, but the value may be overridden by this parm.");
1400 module_param(unload_when_empty
, bool, 0);
1401 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1402 " specified or found, default is 1. Setting to 0"
1403 " is useful for hot add of devices using hotmod.");
1404 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1405 MODULE_PARM_DESC(kipmid_max_busy_us
,
1406 "Max time (in microseconds) to busy-wait for IPMI data before"
1407 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1408 " if kipmid is using up a lot of CPU time.");
1411 static void std_irq_cleanup(struct smi_info
*info
)
1413 if (info
->si_type
== SI_BT
)
1414 /* Disable the interrupt in the BT interface. */
1415 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1416 free_irq(info
->irq
, info
);
1419 static int std_irq_setup(struct smi_info
*info
)
1426 if (info
->si_type
== SI_BT
) {
1427 rv
= request_irq(info
->irq
,
1433 /* Enable the interrupt in the BT interface. */
1434 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1435 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1437 rv
= request_irq(info
->irq
,
1443 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1444 " running polled\n",
1445 DEVICE_NAME
, info
->irq
);
1448 info
->irq_cleanup
= std_irq_cleanup
;
1449 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1455 static unsigned char port_inb(const struct si_sm_io
*io
, unsigned int offset
)
1457 unsigned int addr
= io
->addr_data
;
1459 return inb(addr
+ (offset
* io
->regspacing
));
1462 static void port_outb(const struct si_sm_io
*io
, unsigned int offset
,
1465 unsigned int addr
= io
->addr_data
;
1467 outb(b
, addr
+ (offset
* io
->regspacing
));
1470 static unsigned char port_inw(const struct si_sm_io
*io
, unsigned int offset
)
1472 unsigned int addr
= io
->addr_data
;
1474 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1477 static void port_outw(const struct si_sm_io
*io
, unsigned int offset
,
1480 unsigned int addr
= io
->addr_data
;
1482 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1485 static unsigned char port_inl(const struct si_sm_io
*io
, unsigned int offset
)
1487 unsigned int addr
= io
->addr_data
;
1489 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1492 static void port_outl(const struct si_sm_io
*io
, unsigned int offset
,
1495 unsigned int addr
= io
->addr_data
;
1497 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1500 static void port_cleanup(struct smi_info
*info
)
1502 unsigned int addr
= info
->io
.addr_data
;
1506 for (idx
= 0; idx
< info
->io_size
; idx
++)
1507 release_region(addr
+ idx
* info
->io
.regspacing
,
1512 static int port_setup(struct smi_info
*info
)
1514 unsigned int addr
= info
->io
.addr_data
;
1520 info
->io_cleanup
= port_cleanup
;
1523 * Figure out the actual inb/inw/inl/etc routine to use based
1524 * upon the register size.
1526 switch (info
->io
.regsize
) {
1528 info
->io
.inputb
= port_inb
;
1529 info
->io
.outputb
= port_outb
;
1532 info
->io
.inputb
= port_inw
;
1533 info
->io
.outputb
= port_outw
;
1536 info
->io
.inputb
= port_inl
;
1537 info
->io
.outputb
= port_outl
;
1540 dev_warn(info
->dev
, "Invalid register size: %d\n",
1546 * Some BIOSes reserve disjoint I/O regions in their ACPI
1547 * tables. This causes problems when trying to register the
1548 * entire I/O region. Therefore we must register each I/O
1551 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1552 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1553 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1554 /* Undo allocations */
1556 release_region(addr
+ idx
* info
->io
.regspacing
,
1565 static unsigned char intf_mem_inb(const struct si_sm_io
*io
,
1566 unsigned int offset
)
1568 return readb((io
->addr
)+(offset
* io
->regspacing
));
1571 static void intf_mem_outb(const struct si_sm_io
*io
, unsigned int offset
,
1574 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1577 static unsigned char intf_mem_inw(const struct si_sm_io
*io
,
1578 unsigned int offset
)
1580 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1584 static void intf_mem_outw(const struct si_sm_io
*io
, unsigned int offset
,
1587 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1590 static unsigned char intf_mem_inl(const struct si_sm_io
*io
,
1591 unsigned int offset
)
1593 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1597 static void intf_mem_outl(const struct si_sm_io
*io
, unsigned int offset
,
1600 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1604 static unsigned char mem_inq(const struct si_sm_io
*io
, unsigned int offset
)
1606 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1610 static void mem_outq(const struct si_sm_io
*io
, unsigned int offset
,
1613 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1617 static void mem_cleanup(struct smi_info
*info
)
1619 unsigned long addr
= info
->io
.addr_data
;
1622 if (info
->io
.addr
) {
1623 iounmap(info
->io
.addr
);
1625 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1626 - (info
->io
.regspacing
- info
->io
.regsize
));
1628 release_mem_region(addr
, mapsize
);
1632 static int mem_setup(struct smi_info
*info
)
1634 unsigned long addr
= info
->io
.addr_data
;
1640 info
->io_cleanup
= mem_cleanup
;
1643 * Figure out the actual readb/readw/readl/etc routine to use based
1644 * upon the register size.
1646 switch (info
->io
.regsize
) {
1648 info
->io
.inputb
= intf_mem_inb
;
1649 info
->io
.outputb
= intf_mem_outb
;
1652 info
->io
.inputb
= intf_mem_inw
;
1653 info
->io
.outputb
= intf_mem_outw
;
1656 info
->io
.inputb
= intf_mem_inl
;
1657 info
->io
.outputb
= intf_mem_outl
;
1661 info
->io
.inputb
= mem_inq
;
1662 info
->io
.outputb
= mem_outq
;
1666 dev_warn(info
->dev
, "Invalid register size: %d\n",
1672 * Calculate the total amount of memory to claim. This is an
1673 * unusual looking calculation, but it avoids claiming any
1674 * more memory than it has to. It will claim everything
1675 * between the first address to the end of the last full
1678 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1679 - (info
->io
.regspacing
- info
->io
.regsize
));
1681 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1684 info
->io
.addr
= ioremap(addr
, mapsize
);
1685 if (info
->io
.addr
== NULL
) {
1686 release_mem_region(addr
, mapsize
);
1693 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1694 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1702 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1703 struct hotmod_vals
{
1707 static struct hotmod_vals hotmod_ops
[] = {
1709 { "remove", HM_REMOVE
},
1712 static struct hotmod_vals hotmod_si
[] = {
1714 { "smic", SI_SMIC
},
1718 static struct hotmod_vals hotmod_as
[] = {
1719 { "mem", IPMI_MEM_ADDR_SPACE
},
1720 { "i/o", IPMI_IO_ADDR_SPACE
},
1724 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1729 s
= strchr(*curr
, ',');
1731 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1736 for (i
= 0; v
[i
].name
; i
++) {
1737 if (strcmp(*curr
, v
[i
].name
) == 0) {
1744 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1748 static int check_hotmod_int_op(const char *curr
, const char *option
,
1749 const char *name
, int *val
)
1753 if (strcmp(curr
, name
) == 0) {
1755 printk(KERN_WARNING PFX
1756 "No option given for '%s'\n",
1760 *val
= simple_strtoul(option
, &n
, 0);
1761 if ((*n
!= '\0') || (*option
== '\0')) {
1762 printk(KERN_WARNING PFX
1763 "Bad option given for '%s'\n",
1772 static struct smi_info
*smi_info_alloc(void)
1774 struct smi_info
*info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1777 spin_lock_init(&info
->si_lock
);
1781 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1783 char *str
= kstrdup(val
, GFP_KERNEL
);
1785 char *next
, *curr
, *s
, *n
, *o
;
1787 enum si_type si_type
;
1797 struct smi_info
*info
;
1802 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1805 while ((ival
>= 0) && isspace(str
[ival
])) {
1810 for (curr
= str
; curr
; curr
= next
) {
1815 ipmb
= 0; /* Choose the default if not specified */
1817 next
= strchr(curr
, ':');
1823 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1828 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1833 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1837 s
= strchr(curr
, ',');
1842 addr
= simple_strtoul(curr
, &n
, 0);
1843 if ((*n
!= '\0') || (*curr
== '\0')) {
1844 printk(KERN_WARNING PFX
"Invalid hotmod address"
1851 s
= strchr(curr
, ',');
1856 o
= strchr(curr
, '=');
1861 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1866 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1871 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1876 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1881 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1888 printk(KERN_WARNING PFX
1889 "Invalid hotmod option '%s'\n",
1895 info
= smi_info_alloc();
1901 info
->addr_source
= SI_HOTMOD
;
1902 info
->si_type
= si_type
;
1903 info
->io
.addr_data
= addr
;
1904 info
->io
.addr_type
= addr_space
;
1905 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1906 info
->io_setup
= mem_setup
;
1908 info
->io_setup
= port_setup
;
1910 info
->io
.addr
= NULL
;
1911 info
->io
.regspacing
= regspacing
;
1912 if (!info
->io
.regspacing
)
1913 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1914 info
->io
.regsize
= regsize
;
1915 if (!info
->io
.regsize
)
1916 info
->io
.regsize
= DEFAULT_REGSPACING
;
1917 info
->io
.regshift
= regshift
;
1920 info
->irq_setup
= std_irq_setup
;
1921 info
->slave_addr
= ipmb
;
1928 rv
= try_smi_init(info
);
1930 cleanup_one_si(info
);
1935 struct smi_info
*e
, *tmp_e
;
1937 mutex_lock(&smi_infos_lock
);
1938 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1939 if (e
->io
.addr_type
!= addr_space
)
1941 if (e
->si_type
!= si_type
)
1943 if (e
->io
.addr_data
== addr
)
1946 mutex_unlock(&smi_infos_lock
);
1955 static int hardcode_find_bmc(void)
1959 struct smi_info
*info
;
1961 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1962 if (!ports
[i
] && !addrs
[i
])
1965 info
= smi_info_alloc();
1969 info
->addr_source
= SI_HARDCODED
;
1970 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1972 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1973 info
->si_type
= SI_KCS
;
1974 } else if (strcmp(si_type
[i
], "smic") == 0) {
1975 info
->si_type
= SI_SMIC
;
1976 } else if (strcmp(si_type
[i
], "bt") == 0) {
1977 info
->si_type
= SI_BT
;
1979 printk(KERN_WARNING PFX
"Interface type specified "
1980 "for interface %d, was invalid: %s\n",
1988 info
->io_setup
= port_setup
;
1989 info
->io
.addr_data
= ports
[i
];
1990 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1991 } else if (addrs
[i
]) {
1993 info
->io_setup
= mem_setup
;
1994 info
->io
.addr_data
= addrs
[i
];
1995 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1997 printk(KERN_WARNING PFX
"Interface type specified "
1998 "for interface %d, but port and address were "
1999 "not set or set to zero.\n", i
);
2004 info
->io
.addr
= NULL
;
2005 info
->io
.regspacing
= regspacings
[i
];
2006 if (!info
->io
.regspacing
)
2007 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2008 info
->io
.regsize
= regsizes
[i
];
2009 if (!info
->io
.regsize
)
2010 info
->io
.regsize
= DEFAULT_REGSPACING
;
2011 info
->io
.regshift
= regshifts
[i
];
2012 info
->irq
= irqs
[i
];
2014 info
->irq_setup
= std_irq_setup
;
2015 info
->slave_addr
= slave_addrs
[i
];
2017 if (!add_smi(info
)) {
2018 if (try_smi_init(info
))
2019 cleanup_one_si(info
);
2030 #include <linux/acpi.h>
2033 * Once we get an ACPI failure, we don't try any more, because we go
2034 * through the tables sequentially. Once we don't find a table, there
2037 static int acpi_failure
;
2039 /* For GPE-type interrupts. */
2040 static u32
ipmi_acpi_gpe(acpi_handle gpe_device
,
2041 u32 gpe_number
, void *context
)
2043 struct smi_info
*smi_info
= context
;
2044 unsigned long flags
;
2046 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
2048 smi_inc_stat(smi_info
, interrupts
);
2050 debug_timestamp("ACPI_GPE");
2052 smi_event_handler(smi_info
, 0);
2053 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
2055 return ACPI_INTERRUPT_HANDLED
;
2058 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
2063 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
2066 static int acpi_gpe_irq_setup(struct smi_info
*info
)
2073 status
= acpi_install_gpe_handler(NULL
,
2075 ACPI_GPE_LEVEL_TRIGGERED
,
2078 if (status
!= AE_OK
) {
2079 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
2080 " running polled\n", DEVICE_NAME
, info
->irq
);
2084 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
2085 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
2092 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2103 s8 CreatorRevision
[4];
2106 s16 SpecificationRevision
;
2109 * Bit 0 - SCI interrupt supported
2110 * Bit 1 - I/O APIC/SAPIC
2115 * If bit 0 of InterruptType is set, then this is the SCI
2116 * interrupt in the GPEx_STS register.
2123 * If bit 1 of InterruptType is set, then this is the I/O
2124 * APIC/SAPIC interrupt.
2126 u32 GlobalSystemInterrupt
;
2128 /* The actual register address. */
2129 struct acpi_generic_address addr
;
2133 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2136 static int try_init_spmi(struct SPMITable
*spmi
)
2138 struct smi_info
*info
;
2141 if (spmi
->IPMIlegacy
!= 1) {
2142 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2146 info
= smi_info_alloc();
2148 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2152 info
->addr_source
= SI_SPMI
;
2153 printk(KERN_INFO PFX
"probing via SPMI\n");
2155 /* Figure out the interface type. */
2156 switch (spmi
->InterfaceType
) {
2158 info
->si_type
= SI_KCS
;
2161 info
->si_type
= SI_SMIC
;
2164 info
->si_type
= SI_BT
;
2166 case 4: /* SSIF, just ignore */
2170 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2171 spmi
->InterfaceType
);
2176 if (spmi
->InterruptType
& 1) {
2177 /* We've got a GPE interrupt. */
2178 info
->irq
= spmi
->GPE
;
2179 info
->irq_setup
= acpi_gpe_irq_setup
;
2180 } else if (spmi
->InterruptType
& 2) {
2181 /* We've got an APIC/SAPIC interrupt. */
2182 info
->irq
= spmi
->GlobalSystemInterrupt
;
2183 info
->irq_setup
= std_irq_setup
;
2185 /* Use the default interrupt setting. */
2187 info
->irq_setup
= NULL
;
2190 if (spmi
->addr
.bit_width
) {
2191 /* A (hopefully) properly formed register bit width. */
2192 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2194 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2196 info
->io
.regsize
= info
->io
.regspacing
;
2197 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2199 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2200 info
->io_setup
= mem_setup
;
2201 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2202 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2203 info
->io_setup
= port_setup
;
2204 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2207 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2210 info
->io
.addr_data
= spmi
->addr
.address
;
2212 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2213 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2214 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2224 static void spmi_find_bmc(void)
2227 struct SPMITable
*spmi
;
2236 for (i
= 0; ; i
++) {
2237 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2238 (struct acpi_table_header
**)&spmi
);
2239 if (status
!= AE_OK
)
2242 try_init_spmi(spmi
);
2248 struct dmi_ipmi_data
{
2251 unsigned long base_addr
;
2257 static int decode_dmi(const struct dmi_header
*dm
,
2258 struct dmi_ipmi_data
*dmi
)
2260 const u8
*data
= (const u8
*)dm
;
2261 unsigned long base_addr
;
2263 u8 len
= dm
->length
;
2265 dmi
->type
= data
[4];
2267 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2269 if (base_addr
& 1) {
2271 base_addr
&= 0xFFFE;
2272 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2275 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2277 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2279 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2281 dmi
->irq
= data
[0x11];
2283 /* The top two bits of byte 0x10 hold the register spacing. */
2284 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2285 switch (reg_spacing
) {
2286 case 0x00: /* Byte boundaries */
2289 case 0x01: /* 32-bit boundaries */
2292 case 0x02: /* 16-byte boundaries */
2296 /* Some other interface, just ignore it. */
2302 * Note that technically, the lower bit of the base
2303 * address should be 1 if the address is I/O and 0 if
2304 * the address is in memory. So many systems get that
2305 * wrong (and all that I have seen are I/O) so we just
2306 * ignore that bit and assume I/O. Systems that use
2307 * memory should use the newer spec, anyway.
2309 dmi
->base_addr
= base_addr
& 0xfffe;
2310 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2314 dmi
->slave_addr
= data
[6];
2319 static void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2321 struct smi_info
*info
;
2323 info
= smi_info_alloc();
2325 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2329 info
->addr_source
= SI_SMBIOS
;
2330 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2332 switch (ipmi_data
->type
) {
2333 case 0x01: /* KCS */
2334 info
->si_type
= SI_KCS
;
2336 case 0x02: /* SMIC */
2337 info
->si_type
= SI_SMIC
;
2340 info
->si_type
= SI_BT
;
2347 switch (ipmi_data
->addr_space
) {
2348 case IPMI_MEM_ADDR_SPACE
:
2349 info
->io_setup
= mem_setup
;
2350 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2353 case IPMI_IO_ADDR_SPACE
:
2354 info
->io_setup
= port_setup
;
2355 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2360 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2361 ipmi_data
->addr_space
);
2364 info
->io
.addr_data
= ipmi_data
->base_addr
;
2366 info
->io
.regspacing
= ipmi_data
->offset
;
2367 if (!info
->io
.regspacing
)
2368 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2369 info
->io
.regsize
= DEFAULT_REGSPACING
;
2370 info
->io
.regshift
= 0;
2372 info
->slave_addr
= ipmi_data
->slave_addr
;
2374 info
->irq
= ipmi_data
->irq
;
2376 info
->irq_setup
= std_irq_setup
;
2378 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2379 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2380 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2387 static void dmi_find_bmc(void)
2389 const struct dmi_device
*dev
= NULL
;
2390 struct dmi_ipmi_data data
;
2393 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2394 memset(&data
, 0, sizeof(data
));
2395 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2398 try_init_dmi(&data
);
2401 #endif /* CONFIG_DMI */
2405 #define PCI_ERMC_CLASSCODE 0x0C0700
2406 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2407 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2408 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2409 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2410 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2412 #define PCI_HP_VENDOR_ID 0x103C
2413 #define PCI_MMC_DEVICE_ID 0x121A
2414 #define PCI_MMC_ADDR_CW 0x10
2416 static void ipmi_pci_cleanup(struct smi_info
*info
)
2418 struct pci_dev
*pdev
= info
->addr_source_data
;
2420 pci_disable_device(pdev
);
2423 static int ipmi_pci_probe_regspacing(struct smi_info
*info
)
2425 if (info
->si_type
== SI_KCS
) {
2426 unsigned char status
;
2429 info
->io
.regsize
= DEFAULT_REGSIZE
;
2430 info
->io
.regshift
= 0;
2432 info
->handlers
= &kcs_smi_handlers
;
2434 /* detect 1, 4, 16byte spacing */
2435 for (regspacing
= DEFAULT_REGSPACING
; regspacing
<= 16;) {
2436 info
->io
.regspacing
= regspacing
;
2437 if (info
->io_setup(info
)) {
2439 "Could not setup I/O space\n");
2440 return DEFAULT_REGSPACING
;
2442 /* write invalid cmd */
2443 info
->io
.outputb(&info
->io
, 1, 0x10);
2444 /* read status back */
2445 status
= info
->io
.inputb(&info
->io
, 1);
2446 info
->io_cleanup(info
);
2452 return DEFAULT_REGSPACING
;
2455 static int ipmi_pci_probe(struct pci_dev
*pdev
,
2456 const struct pci_device_id
*ent
)
2459 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2460 struct smi_info
*info
;
2462 info
= smi_info_alloc();
2466 info
->addr_source
= SI_PCI
;
2467 dev_info(&pdev
->dev
, "probing via PCI");
2469 switch (class_type
) {
2470 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2471 info
->si_type
= SI_SMIC
;
2474 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2475 info
->si_type
= SI_KCS
;
2478 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2479 info
->si_type
= SI_BT
;
2484 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2488 rv
= pci_enable_device(pdev
);
2490 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2495 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2496 info
->addr_source_data
= pdev
;
2498 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2499 info
->io_setup
= port_setup
;
2500 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2502 info
->io_setup
= mem_setup
;
2503 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2505 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2507 info
->io
.regspacing
= ipmi_pci_probe_regspacing(info
);
2508 info
->io
.regsize
= DEFAULT_REGSIZE
;
2509 info
->io
.regshift
= 0;
2511 info
->irq
= pdev
->irq
;
2513 info
->irq_setup
= std_irq_setup
;
2515 info
->dev
= &pdev
->dev
;
2516 pci_set_drvdata(pdev
, info
);
2518 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2519 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2525 pci_disable_device(pdev
);
2531 static void ipmi_pci_remove(struct pci_dev
*pdev
)
2533 struct smi_info
*info
= pci_get_drvdata(pdev
);
2534 cleanup_one_si(info
);
2535 pci_disable_device(pdev
);
2538 static const 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
= ipmi_pci_remove
,
2551 #endif /* CONFIG_PCI */
2554 static const struct of_device_id of_ipmi_match
[] = {
2555 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2556 .data
= (void *)(unsigned long) SI_KCS
},
2557 { .type
= "ipmi", .compatible
= "ipmi-smic",
2558 .data
= (void *)(unsigned long) SI_SMIC
},
2559 { .type
= "ipmi", .compatible
= "ipmi-bt",
2560 .data
= (void *)(unsigned long) SI_BT
},
2564 static int of_ipmi_probe(struct platform_device
*dev
)
2566 const struct of_device_id
*match
;
2567 struct smi_info
*info
;
2568 struct resource resource
;
2569 const __be32
*regsize
, *regspacing
, *regshift
;
2570 struct device_node
*np
= dev
->dev
.of_node
;
2574 dev_info(&dev
->dev
, "probing via device tree\n");
2576 match
= of_match_device(of_ipmi_match
, &dev
->dev
);
2580 if (!of_device_is_available(np
))
2583 ret
= of_address_to_resource(np
, 0, &resource
);
2585 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2589 regsize
= of_get_property(np
, "reg-size", &proplen
);
2590 if (regsize
&& proplen
!= 4) {
2591 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2595 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2596 if (regspacing
&& proplen
!= 4) {
2597 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2601 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2602 if (regshift
&& proplen
!= 4) {
2603 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2607 info
= smi_info_alloc();
2611 "could not allocate memory for OF probe\n");
2615 info
->si_type
= (enum si_type
) match
->data
;
2616 info
->addr_source
= SI_DEVICETREE
;
2617 info
->irq_setup
= std_irq_setup
;
2619 if (resource
.flags
& IORESOURCE_IO
) {
2620 info
->io_setup
= port_setup
;
2621 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2623 info
->io_setup
= mem_setup
;
2624 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2627 info
->io
.addr_data
= resource
.start
;
2629 info
->io
.regsize
= regsize
? be32_to_cpup(regsize
) : DEFAULT_REGSIZE
;
2630 info
->io
.regspacing
= regspacing
? be32_to_cpup(regspacing
) : DEFAULT_REGSPACING
;
2631 info
->io
.regshift
= regshift
? be32_to_cpup(regshift
) : 0;
2633 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2634 info
->dev
= &dev
->dev
;
2636 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2637 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2640 dev_set_drvdata(&dev
->dev
, info
);
2642 ret
= add_smi(info
);
2649 MODULE_DEVICE_TABLE(of
, of_ipmi_match
);
2651 #define of_ipmi_match NULL
2652 static int of_ipmi_probe(struct platform_device
*dev
)
2659 static int acpi_ipmi_probe(struct platform_device
*dev
)
2661 struct smi_info
*info
;
2662 struct resource
*res
, *res_second
;
2665 unsigned long long tmp
;
2668 handle
= ACPI_HANDLE(&dev
->dev
);
2672 info
= smi_info_alloc();
2676 info
->addr_source
= SI_ACPI
;
2677 dev_info(&dev
->dev
, PFX
"probing via ACPI\n");
2679 info
->addr_info
.acpi_info
.acpi_handle
= handle
;
2681 /* _IFT tells us the interface type: KCS, BT, etc */
2682 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2683 if (ACPI_FAILURE(status
)) {
2684 dev_err(&dev
->dev
, "Could not find ACPI IPMI interface type\n");
2690 info
->si_type
= SI_KCS
;
2693 info
->si_type
= SI_SMIC
;
2696 info
->si_type
= SI_BT
;
2698 case 4: /* SSIF, just ignore */
2702 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2706 res
= platform_get_resource(dev
, IORESOURCE_IO
, 0);
2708 info
->io_setup
= port_setup
;
2709 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2711 res
= platform_get_resource(dev
, IORESOURCE_MEM
, 0);
2713 info
->io_setup
= mem_setup
;
2714 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2718 dev_err(&dev
->dev
, "no I/O or memory address\n");
2721 info
->io
.addr_data
= res
->start
;
2723 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2724 res_second
= platform_get_resource(dev
,
2725 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2726 IORESOURCE_IO
: IORESOURCE_MEM
,
2729 if (res_second
->start
> info
->io
.addr_data
)
2730 info
->io
.regspacing
=
2731 res_second
->start
- info
->io
.addr_data
;
2733 info
->io
.regsize
= DEFAULT_REGSPACING
;
2734 info
->io
.regshift
= 0;
2736 /* If _GPE exists, use it; otherwise use standard interrupts */
2737 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2738 if (ACPI_SUCCESS(status
)) {
2740 info
->irq_setup
= acpi_gpe_irq_setup
;
2742 int irq
= platform_get_irq(dev
, 0);
2746 info
->irq_setup
= std_irq_setup
;
2750 info
->dev
= &dev
->dev
;
2751 platform_set_drvdata(dev
, info
);
2753 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2754 res
, info
->io
.regsize
, info
->io
.regspacing
,
2768 static const struct acpi_device_id acpi_ipmi_match
[] = {
2772 MODULE_DEVICE_TABLE(acpi
, acpi_ipmi_match
);
2774 static int acpi_ipmi_probe(struct platform_device
*dev
)
2780 static int ipmi_probe(struct platform_device
*dev
)
2782 if (of_ipmi_probe(dev
) == 0)
2785 return acpi_ipmi_probe(dev
);
2788 static int ipmi_remove(struct platform_device
*dev
)
2790 struct smi_info
*info
= dev_get_drvdata(&dev
->dev
);
2792 cleanup_one_si(info
);
2796 static struct platform_driver ipmi_driver
= {
2798 .name
= DEVICE_NAME
,
2799 .of_match_table
= of_ipmi_match
,
2800 .acpi_match_table
= ACPI_PTR(acpi_ipmi_match
),
2802 .probe
= ipmi_probe
,
2803 .remove
= ipmi_remove
,
2806 #ifdef CONFIG_PARISC
2807 static int ipmi_parisc_probe(struct parisc_device
*dev
)
2809 struct smi_info
*info
;
2812 info
= smi_info_alloc();
2816 "could not allocate memory for PARISC probe\n");
2820 info
->si_type
= SI_KCS
;
2821 info
->addr_source
= SI_DEVICETREE
;
2822 info
->io_setup
= mem_setup
;
2823 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2824 info
->io
.addr_data
= dev
->hpa
.start
;
2825 info
->io
.regsize
= 1;
2826 info
->io
.regspacing
= 1;
2827 info
->io
.regshift
= 0;
2828 info
->irq
= 0; /* no interrupt */
2829 info
->irq_setup
= NULL
;
2830 info
->dev
= &dev
->dev
;
2832 dev_dbg(&dev
->dev
, "addr 0x%lx\n", info
->io
.addr_data
);
2834 dev_set_drvdata(&dev
->dev
, info
);
2845 static int ipmi_parisc_remove(struct parisc_device
*dev
)
2847 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2851 static struct parisc_device_id ipmi_parisc_tbl
[] = {
2852 { HPHW_MC
, HVERSION_REV_ANY_ID
, 0x004, 0xC0 },
2856 static struct parisc_driver ipmi_parisc_driver
= {
2858 .id_table
= ipmi_parisc_tbl
,
2859 .probe
= ipmi_parisc_probe
,
2860 .remove
= ipmi_parisc_remove
,
2862 #endif /* CONFIG_PARISC */
2864 static int wait_for_msg_done(struct smi_info
*smi_info
)
2866 enum si_sm_result smi_result
;
2868 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2870 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2871 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2872 schedule_timeout_uninterruptible(1);
2873 smi_result
= smi_info
->handlers
->event(
2874 smi_info
->si_sm
, jiffies_to_usecs(1));
2875 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2876 smi_result
= smi_info
->handlers
->event(
2877 smi_info
->si_sm
, 0);
2881 if (smi_result
== SI_SM_HOSED
)
2883 * We couldn't get the state machine to run, so whatever's at
2884 * the port is probably not an IPMI SMI interface.
2891 static int try_get_dev_id(struct smi_info
*smi_info
)
2893 unsigned char msg
[2];
2894 unsigned char *resp
;
2895 unsigned long resp_len
;
2898 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2903 * Do a Get Device ID command, since it comes back with some
2906 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2907 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2908 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2910 rv
= wait_for_msg_done(smi_info
);
2914 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2915 resp
, IPMI_MAX_MSG_LENGTH
);
2917 /* Check and record info from the get device id, in case we need it. */
2918 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2925 static int get_global_enables(struct smi_info
*smi_info
, u8
*enables
)
2927 unsigned char msg
[3];
2928 unsigned char *resp
;
2929 unsigned long resp_len
;
2932 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2936 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2937 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2938 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2940 rv
= wait_for_msg_done(smi_info
);
2942 dev_warn(smi_info
->dev
,
2943 "Error getting response from get global enables command: %d\n",
2948 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2949 resp
, IPMI_MAX_MSG_LENGTH
);
2952 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2953 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2955 dev_warn(smi_info
->dev
,
2956 "Invalid return from get global enables command: %ld %x %x %x\n",
2957 resp_len
, resp
[0], resp
[1], resp
[2]);
2970 * Returns 1 if it gets an error from the command.
2972 static int set_global_enables(struct smi_info
*smi_info
, u8 enables
)
2974 unsigned char msg
[3];
2975 unsigned char *resp
;
2976 unsigned long resp_len
;
2979 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2983 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2984 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2986 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2988 rv
= wait_for_msg_done(smi_info
);
2990 dev_warn(smi_info
->dev
,
2991 "Error getting response from set global enables command: %d\n",
2996 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2997 resp
, IPMI_MAX_MSG_LENGTH
);
3000 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3001 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
3002 dev_warn(smi_info
->dev
,
3003 "Invalid return from set global enables command: %ld %x %x\n",
3004 resp_len
, resp
[0], resp
[1]);
3018 * Some BMCs do not support clearing the receive irq bit in the global
3019 * enables (even if they don't support interrupts on the BMC). Check
3020 * for this and handle it properly.
3022 static void check_clr_rcv_irq(struct smi_info
*smi_info
)
3027 rv
= get_global_enables(smi_info
, &enables
);
3029 if ((enables
& IPMI_BMC_RCV_MSG_INTR
) == 0)
3030 /* Already clear, should work ok. */
3033 enables
&= ~IPMI_BMC_RCV_MSG_INTR
;
3034 rv
= set_global_enables(smi_info
, enables
);
3038 dev_err(smi_info
->dev
,
3039 "Cannot check clearing the rcv irq: %d\n", rv
);
3045 * An error when setting the event buffer bit means
3046 * clearing the bit is not supported.
3048 dev_warn(smi_info
->dev
,
3049 "The BMC does not support clearing the recv irq bit, compensating, but the BMC needs to be fixed.\n");
3050 smi_info
->cannot_disable_irq
= true;
3055 * Some BMCs do not support setting the interrupt bits in the global
3056 * enables even if they support interrupts. Clearly bad, but we can
3059 static void check_set_rcv_irq(struct smi_info
*smi_info
)
3067 rv
= get_global_enables(smi_info
, &enables
);
3069 enables
|= IPMI_BMC_RCV_MSG_INTR
;
3070 rv
= set_global_enables(smi_info
, enables
);
3074 dev_err(smi_info
->dev
,
3075 "Cannot check setting the rcv irq: %d\n", rv
);
3081 * An error when setting the event buffer bit means
3082 * setting the bit is not supported.
3084 dev_warn(smi_info
->dev
,
3085 "The BMC does not support setting the recv irq bit, compensating, but the BMC needs to be fixed.\n");
3086 smi_info
->cannot_disable_irq
= true;
3087 smi_info
->irq_enable_broken
= true;
3091 static int try_enable_event_buffer(struct smi_info
*smi_info
)
3093 unsigned char msg
[3];
3094 unsigned char *resp
;
3095 unsigned long resp_len
;
3098 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
3102 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
3103 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
3104 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
3106 rv
= wait_for_msg_done(smi_info
);
3108 printk(KERN_WARNING PFX
"Error getting response from get"
3109 " global enables command, the event buffer is not"
3114 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
3115 resp
, IPMI_MAX_MSG_LENGTH
);
3118 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3119 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
3121 printk(KERN_WARNING PFX
"Invalid return from get global"
3122 " enables command, cannot enable the event buffer.\n");
3127 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
) {
3128 /* buffer is already enabled, nothing to do. */
3129 smi_info
->supports_event_msg_buff
= true;
3133 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
3134 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
3135 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
3136 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
3138 rv
= wait_for_msg_done(smi_info
);
3140 printk(KERN_WARNING PFX
"Error getting response from set"
3141 " global, enables command, the event buffer is not"
3146 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
3147 resp
, IPMI_MAX_MSG_LENGTH
);
3150 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3151 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
3152 printk(KERN_WARNING PFX
"Invalid return from get global,"
3153 "enables command, not enable the event buffer.\n");
3160 * An error when setting the event buffer bit means
3161 * that the event buffer is not supported.
3165 smi_info
->supports_event_msg_buff
= true;
3172 static int smi_type_proc_show(struct seq_file
*m
, void *v
)
3174 struct smi_info
*smi
= m
->private;
3176 seq_printf(m
, "%s\n", si_to_str
[smi
->si_type
]);
3181 static int smi_type_proc_open(struct inode
*inode
, struct file
*file
)
3183 return single_open(file
, smi_type_proc_show
, PDE_DATA(inode
));
3186 static const struct file_operations smi_type_proc_ops
= {
3187 .open
= smi_type_proc_open
,
3189 .llseek
= seq_lseek
,
3190 .release
= single_release
,
3193 static int smi_si_stats_proc_show(struct seq_file
*m
, void *v
)
3195 struct smi_info
*smi
= m
->private;
3197 seq_printf(m
, "interrupts_enabled: %d\n",
3198 smi
->irq
&& !smi
->interrupt_disabled
);
3199 seq_printf(m
, "short_timeouts: %u\n",
3200 smi_get_stat(smi
, short_timeouts
));
3201 seq_printf(m
, "long_timeouts: %u\n",
3202 smi_get_stat(smi
, long_timeouts
));
3203 seq_printf(m
, "idles: %u\n",
3204 smi_get_stat(smi
, idles
));
3205 seq_printf(m
, "interrupts: %u\n",
3206 smi_get_stat(smi
, interrupts
));
3207 seq_printf(m
, "attentions: %u\n",
3208 smi_get_stat(smi
, attentions
));
3209 seq_printf(m
, "flag_fetches: %u\n",
3210 smi_get_stat(smi
, flag_fetches
));
3211 seq_printf(m
, "hosed_count: %u\n",
3212 smi_get_stat(smi
, hosed_count
));
3213 seq_printf(m
, "complete_transactions: %u\n",
3214 smi_get_stat(smi
, complete_transactions
));
3215 seq_printf(m
, "events: %u\n",
3216 smi_get_stat(smi
, events
));
3217 seq_printf(m
, "watchdog_pretimeouts: %u\n",
3218 smi_get_stat(smi
, watchdog_pretimeouts
));
3219 seq_printf(m
, "incoming_messages: %u\n",
3220 smi_get_stat(smi
, incoming_messages
));
3224 static int smi_si_stats_proc_open(struct inode
*inode
, struct file
*file
)
3226 return single_open(file
, smi_si_stats_proc_show
, PDE_DATA(inode
));
3229 static const struct file_operations smi_si_stats_proc_ops
= {
3230 .open
= smi_si_stats_proc_open
,
3232 .llseek
= seq_lseek
,
3233 .release
= single_release
,
3236 static int smi_params_proc_show(struct seq_file
*m
, void *v
)
3238 struct smi_info
*smi
= m
->private;
3241 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
3242 si_to_str
[smi
->si_type
],
3243 addr_space_to_str
[smi
->io
.addr_type
],
3254 static int smi_params_proc_open(struct inode
*inode
, struct file
*file
)
3256 return single_open(file
, smi_params_proc_show
, PDE_DATA(inode
));
3259 static const struct file_operations smi_params_proc_ops
= {
3260 .open
= smi_params_proc_open
,
3262 .llseek
= seq_lseek
,
3263 .release
= single_release
,
3267 * oem_data_avail_to_receive_msg_avail
3268 * @info - smi_info structure with msg_flags set
3270 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
3271 * Returns 1 indicating need to re-run handle_flags().
3273 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
3275 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
3281 * setup_dell_poweredge_oem_data_handler
3282 * @info - smi_info.device_id must be populated
3284 * Systems that match, but have firmware version < 1.40 may assert
3285 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3286 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3287 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3288 * as RECEIVE_MSG_AVAIL instead.
3290 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3291 * assert the OEM[012] bits, and if it did, the driver would have to
3292 * change to handle that properly, we don't actually check for the
3294 * Device ID = 0x20 BMC on PowerEdge 8G servers
3295 * Device Revision = 0x80
3296 * Firmware Revision1 = 0x01 BMC version 1.40
3297 * Firmware Revision2 = 0x40 BCD encoded
3298 * IPMI Version = 0x51 IPMI 1.5
3299 * Manufacturer ID = A2 02 00 Dell IANA
3301 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3302 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3305 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3306 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3307 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
3308 #define DELL_IANA_MFR_ID 0x0002a2
3309 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
3311 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3312 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
3313 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
3314 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
3315 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
3316 smi_info
->oem_data_avail_handler
=
3317 oem_data_avail_to_receive_msg_avail
;
3318 } else if (ipmi_version_major(id
) < 1 ||
3319 (ipmi_version_major(id
) == 1 &&
3320 ipmi_version_minor(id
) < 5)) {
3321 smi_info
->oem_data_avail_handler
=
3322 oem_data_avail_to_receive_msg_avail
;
3327 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3328 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
3330 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
3332 /* Make it a response */
3333 msg
->rsp
[0] = msg
->data
[0] | 4;
3334 msg
->rsp
[1] = msg
->data
[1];
3335 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
3337 smi_info
->curr_msg
= NULL
;
3338 deliver_recv_msg(smi_info
, msg
);
3342 * dell_poweredge_bt_xaction_handler
3343 * @info - smi_info.device_id must be populated
3345 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3346 * not respond to a Get SDR command if the length of the data
3347 * requested is exactly 0x3A, which leads to command timeouts and no
3348 * data returned. This intercepts such commands, and causes userspace
3349 * callers to try again with a different-sized buffer, which succeeds.
3352 #define STORAGE_NETFN 0x0A
3353 #define STORAGE_CMD_GET_SDR 0x23
3354 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
3355 unsigned long unused
,
3358 struct smi_info
*smi_info
= in
;
3359 unsigned char *data
= smi_info
->curr_msg
->data
;
3360 unsigned int size
= smi_info
->curr_msg
->data_size
;
3362 (data
[0]>>2) == STORAGE_NETFN
&&
3363 data
[1] == STORAGE_CMD_GET_SDR
&&
3365 return_hosed_msg_badsize(smi_info
);
3371 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
3372 .notifier_call
= dell_poweredge_bt_xaction_handler
,
3376 * setup_dell_poweredge_bt_xaction_handler
3377 * @info - smi_info.device_id must be filled in already
3379 * Fills in smi_info.device_id.start_transaction_pre_hook
3380 * when we know what function to use there.
3383 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
3385 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3386 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
3387 smi_info
->si_type
== SI_BT
)
3388 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
3392 * setup_oem_data_handler
3393 * @info - smi_info.device_id must be filled in already
3395 * Fills in smi_info.device_id.oem_data_available_handler
3396 * when we know what function to use there.
3399 static void setup_oem_data_handler(struct smi_info
*smi_info
)
3401 setup_dell_poweredge_oem_data_handler(smi_info
);
3404 static void setup_xaction_handlers(struct smi_info
*smi_info
)
3406 setup_dell_poweredge_bt_xaction_handler(smi_info
);
3409 static void check_for_broken_irqs(struct smi_info
*smi_info
)
3411 check_clr_rcv_irq(smi_info
);
3412 check_set_rcv_irq(smi_info
);
3415 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
3417 if (smi_info
->thread
!= NULL
)
3418 kthread_stop(smi_info
->thread
);
3419 if (smi_info
->timer_running
)
3420 del_timer_sync(&smi_info
->si_timer
);
3423 static const struct ipmi_default_vals
3429 { .type
= SI_KCS
, .port
= 0xca2 },
3430 { .type
= SI_SMIC
, .port
= 0xca9 },
3431 { .type
= SI_BT
, .port
= 0xe4 },
3435 static void default_find_bmc(void)
3437 struct smi_info
*info
;
3440 for (i
= 0; ; i
++) {
3441 if (!ipmi_defaults
[i
].port
)
3444 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3447 info
= smi_info_alloc();
3451 info
->addr_source
= SI_DEFAULT
;
3453 info
->si_type
= ipmi_defaults
[i
].type
;
3454 info
->io_setup
= port_setup
;
3455 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3456 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3458 info
->io
.addr
= NULL
;
3459 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3460 info
->io
.regsize
= DEFAULT_REGSPACING
;
3461 info
->io
.regshift
= 0;
3463 if (add_smi(info
) == 0) {
3464 if ((try_smi_init(info
)) == 0) {
3466 printk(KERN_INFO PFX
"Found default %s"
3467 " state machine at %s address 0x%lx\n",
3468 si_to_str
[info
->si_type
],
3469 addr_space_to_str
[info
->io
.addr_type
],
3470 info
->io
.addr_data
);
3472 cleanup_one_si(info
);
3479 static int is_new_interface(struct smi_info
*info
)
3483 list_for_each_entry(e
, &smi_infos
, link
) {
3484 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3486 if (e
->io
.addr_data
== info
->io
.addr_data
)
3493 static int add_smi(struct smi_info
*new_smi
)
3497 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3498 ipmi_addr_src_to_str(new_smi
->addr_source
),
3499 si_to_str
[new_smi
->si_type
]);
3500 mutex_lock(&smi_infos_lock
);
3501 if (!is_new_interface(new_smi
)) {
3502 printk(KERN_CONT
" duplicate interface\n");
3507 printk(KERN_CONT
"\n");
3509 /* So we know not to free it unless we have allocated one. */
3510 new_smi
->intf
= NULL
;
3511 new_smi
->si_sm
= NULL
;
3512 new_smi
->handlers
= NULL
;
3514 list_add_tail(&new_smi
->link
, &smi_infos
);
3517 mutex_unlock(&smi_infos_lock
);
3521 static int try_smi_init(struct smi_info
*new_smi
)
3526 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3527 " machine at %s address 0x%lx, slave address 0x%x,"
3529 ipmi_addr_src_to_str(new_smi
->addr_source
),
3530 si_to_str
[new_smi
->si_type
],
3531 addr_space_to_str
[new_smi
->io
.addr_type
],
3532 new_smi
->io
.addr_data
,
3533 new_smi
->slave_addr
, new_smi
->irq
);
3535 switch (new_smi
->si_type
) {
3537 new_smi
->handlers
= &kcs_smi_handlers
;
3541 new_smi
->handlers
= &smic_smi_handlers
;
3545 new_smi
->handlers
= &bt_smi_handlers
;
3549 /* No support for anything else yet. */
3554 /* Allocate the state machine's data and initialize it. */
3555 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3556 if (!new_smi
->si_sm
) {
3558 "Could not allocate state machine memory\n");
3562 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3565 /* Now that we know the I/O size, we can set up the I/O. */
3566 rv
= new_smi
->io_setup(new_smi
);
3568 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3572 /* Do low-level detection first. */
3573 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3574 if (new_smi
->addr_source
)
3575 printk(KERN_INFO PFX
"Interface detection failed\n");
3581 * Attempt a get device id command. If it fails, we probably
3582 * don't have a BMC here.
3584 rv
= try_get_dev_id(new_smi
);
3586 if (new_smi
->addr_source
)
3587 printk(KERN_INFO PFX
"There appears to be no BMC"
3588 " at this location\n");
3592 setup_oem_data_handler(new_smi
);
3593 setup_xaction_handlers(new_smi
);
3594 check_for_broken_irqs(new_smi
);
3596 new_smi
->waiting_msg
= NULL
;
3597 new_smi
->curr_msg
= NULL
;
3598 atomic_set(&new_smi
->req_events
, 0);
3599 new_smi
->run_to_completion
= false;
3600 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3601 atomic_set(&new_smi
->stats
[i
], 0);
3603 new_smi
->interrupt_disabled
= true;
3604 atomic_set(&new_smi
->need_watch
, 0);
3605 new_smi
->intf_num
= smi_num
;
3608 rv
= try_enable_event_buffer(new_smi
);
3610 new_smi
->has_event_buffer
= true;
3613 * Start clearing the flags before we enable interrupts or the
3614 * timer to avoid racing with the timer.
3616 start_clear_flags(new_smi
);
3619 * IRQ is defined to be set when non-zero. req_events will
3620 * cause a global flags check that will enable interrupts.
3623 new_smi
->interrupt_disabled
= false;
3624 atomic_set(&new_smi
->req_events
, 1);
3627 if (!new_smi
->dev
) {
3629 * If we don't already have a device from something
3630 * else (like PCI), then register a new one.
3632 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3634 if (!new_smi
->pdev
) {
3636 "Unable to allocate platform device\n");
3639 new_smi
->dev
= &new_smi
->pdev
->dev
;
3640 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3642 rv
= platform_device_add(new_smi
->pdev
);
3645 "Unable to register system interface device:"
3650 new_smi
->dev_registered
= true;
3653 rv
= ipmi_register_smi(&handlers
,
3655 &new_smi
->device_id
,
3657 new_smi
->slave_addr
);
3659 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3661 goto out_err_stop_timer
;
3664 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3668 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3669 goto out_err_stop_timer
;
3672 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3673 &smi_si_stats_proc_ops
,
3676 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3677 goto out_err_stop_timer
;
3680 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3681 &smi_params_proc_ops
,
3684 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3685 goto out_err_stop_timer
;
3688 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3689 si_to_str
[new_smi
->si_type
]);
3694 wait_for_timer_and_thread(new_smi
);
3697 new_smi
->interrupt_disabled
= true;
3699 if (new_smi
->intf
) {
3700 ipmi_smi_t intf
= new_smi
->intf
;
3701 new_smi
->intf
= NULL
;
3702 ipmi_unregister_smi(intf
);
3705 if (new_smi
->irq_cleanup
) {
3706 new_smi
->irq_cleanup(new_smi
);
3707 new_smi
->irq_cleanup
= NULL
;
3711 * Wait until we know that we are out of any interrupt
3712 * handlers might have been running before we freed the
3715 synchronize_sched();
3717 if (new_smi
->si_sm
) {
3718 if (new_smi
->handlers
)
3719 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3720 kfree(new_smi
->si_sm
);
3721 new_smi
->si_sm
= NULL
;
3723 if (new_smi
->addr_source_cleanup
) {
3724 new_smi
->addr_source_cleanup(new_smi
);
3725 new_smi
->addr_source_cleanup
= NULL
;
3727 if (new_smi
->io_cleanup
) {
3728 new_smi
->io_cleanup(new_smi
);
3729 new_smi
->io_cleanup
= NULL
;
3732 if (new_smi
->dev_registered
) {
3733 platform_device_unregister(new_smi
->pdev
);
3734 new_smi
->dev_registered
= false;
3740 static int init_ipmi_si(void)
3746 enum ipmi_addr_src type
= SI_INVALID
;
3752 if (si_tryplatform
) {
3753 rv
= platform_driver_register(&ipmi_driver
);
3755 printk(KERN_ERR PFX
"Unable to register "
3756 "driver: %d\n", rv
);
3761 /* Parse out the si_type string into its components. */
3764 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3766 str
= strchr(str
, ',');
3776 printk(KERN_INFO
"IPMI System Interface driver.\n");
3778 /* If the user gave us a device, they presumably want us to use it */
3779 if (!hardcode_find_bmc())
3784 rv
= pci_register_driver(&ipmi_pci_driver
);
3786 printk(KERN_ERR PFX
"Unable to register "
3787 "PCI driver: %d\n", rv
);
3789 pci_registered
= true;
3803 #ifdef CONFIG_PARISC
3804 register_parisc_driver(&ipmi_parisc_driver
);
3805 parisc_registered
= true;
3806 /* poking PC IO addresses will crash machine, don't do it */
3810 /* We prefer devices with interrupts, but in the case of a machine
3811 with multiple BMCs we assume that there will be several instances
3812 of a given type so if we succeed in registering a type then also
3813 try to register everything else of the same type */
3815 mutex_lock(&smi_infos_lock
);
3816 list_for_each_entry(e
, &smi_infos
, link
) {
3817 /* Try to register a device if it has an IRQ and we either
3818 haven't successfully registered a device yet or this
3819 device has the same type as one we successfully registered */
3820 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3821 if (!try_smi_init(e
)) {
3822 type
= e
->addr_source
;
3827 /* type will only have been set if we successfully registered an si */
3829 mutex_unlock(&smi_infos_lock
);
3833 /* Fall back to the preferred device */
3835 list_for_each_entry(e
, &smi_infos
, link
) {
3836 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3837 if (!try_smi_init(e
)) {
3838 type
= e
->addr_source
;
3842 mutex_unlock(&smi_infos_lock
);
3847 if (si_trydefaults
) {
3848 mutex_lock(&smi_infos_lock
);
3849 if (list_empty(&smi_infos
)) {
3850 /* No BMC was found, try defaults. */
3851 mutex_unlock(&smi_infos_lock
);
3854 mutex_unlock(&smi_infos_lock
);
3857 mutex_lock(&smi_infos_lock
);
3858 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3859 mutex_unlock(&smi_infos_lock
);
3861 printk(KERN_WARNING PFX
3862 "Unable to find any System Interface(s)\n");
3865 mutex_unlock(&smi_infos_lock
);
3869 module_init(init_ipmi_si
);
3871 static void cleanup_one_si(struct smi_info
*to_clean
)
3878 if (to_clean
->intf
) {
3879 ipmi_smi_t intf
= to_clean
->intf
;
3881 to_clean
->intf
= NULL
;
3882 rv
= ipmi_unregister_smi(intf
);
3884 pr_err(PFX
"Unable to unregister device: errno=%d\n",
3890 dev_set_drvdata(to_clean
->dev
, NULL
);
3892 list_del(&to_clean
->link
);
3895 * Make sure that interrupts, the timer and the thread are
3896 * stopped and will not run again.
3898 if (to_clean
->irq_cleanup
)
3899 to_clean
->irq_cleanup(to_clean
);
3900 wait_for_timer_and_thread(to_clean
);
3903 * Timeouts are stopped, now make sure the interrupts are off
3904 * in the BMC. Note that timers and CPU interrupts are off,
3905 * so no need for locks.
3907 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3909 schedule_timeout_uninterruptible(1);
3911 disable_si_irq(to_clean
);
3912 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3914 schedule_timeout_uninterruptible(1);
3917 if (to_clean
->handlers
)
3918 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3920 kfree(to_clean
->si_sm
);
3922 if (to_clean
->addr_source_cleanup
)
3923 to_clean
->addr_source_cleanup(to_clean
);
3924 if (to_clean
->io_cleanup
)
3925 to_clean
->io_cleanup(to_clean
);
3927 if (to_clean
->dev_registered
)
3928 platform_device_unregister(to_clean
->pdev
);
3933 static void cleanup_ipmi_si(void)
3935 struct smi_info
*e
, *tmp_e
;
3942 pci_unregister_driver(&ipmi_pci_driver
);
3944 #ifdef CONFIG_PARISC
3945 if (parisc_registered
)
3946 unregister_parisc_driver(&ipmi_parisc_driver
);
3949 platform_driver_unregister(&ipmi_driver
);
3951 mutex_lock(&smi_infos_lock
);
3952 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3954 mutex_unlock(&smi_infos_lock
);
3956 module_exit(cleanup_ipmi_si
);
3958 MODULE_LICENSE("GPL");
3959 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3960 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3961 " system interfaces.");