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
109 static const char * const si_to_str
[] = { "kcs", "smic", "bt" };
111 #define DEVICE_NAME "ipmi_si"
113 static struct platform_driver ipmi_driver
;
116 * Indexes into stats[] in smi_info below.
118 enum si_stat_indexes
{
120 * Number of times the driver requested a timer while an operation
123 SI_STAT_short_timeouts
= 0,
126 * Number of times the driver requested a timer while nothing was in
129 SI_STAT_long_timeouts
,
131 /* Number of times the interface was idle while being polled. */
134 /* Number of interrupts the driver handled. */
137 /* Number of time the driver got an ATTN from the hardware. */
140 /* Number of times the driver requested flags from the hardware. */
141 SI_STAT_flag_fetches
,
143 /* Number of times the hardware didn't follow the state machine. */
146 /* Number of completed messages. */
147 SI_STAT_complete_transactions
,
149 /* Number of IPMI events received from the hardware. */
152 /* Number of watchdog pretimeouts. */
153 SI_STAT_watchdog_pretimeouts
,
155 /* Number of asynchronous messages received. */
156 SI_STAT_incoming_messages
,
159 /* This *must* remain last, add new values above this. */
166 struct si_sm_data
*si_sm
;
167 const struct si_sm_handlers
*handlers
;
168 enum si_type si_type
;
170 struct ipmi_smi_msg
*waiting_msg
;
171 struct ipmi_smi_msg
*curr_msg
;
172 enum si_intf_state si_state
;
175 * Used to handle the various types of I/O that can occur with
179 int (*io_setup
)(struct smi_info
*info
);
180 void (*io_cleanup
)(struct smi_info
*info
);
181 int (*irq_setup
)(struct smi_info
*info
);
182 void (*irq_cleanup
)(struct smi_info
*info
);
183 unsigned int io_size
;
184 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
185 void (*addr_source_cleanup
)(struct smi_info
*info
);
186 void *addr_source_data
;
189 * Per-OEM handler, called from handle_flags(). Returns 1
190 * when handle_flags() needs to be re-run or 0 indicating it
191 * set si_state itself.
193 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
196 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
197 * is set to hold the flags until we are done handling everything
200 #define RECEIVE_MSG_AVAIL 0x01
201 #define EVENT_MSG_BUFFER_FULL 0x02
202 #define WDT_PRE_TIMEOUT_INT 0x08
203 #define OEM0_DATA_AVAIL 0x20
204 #define OEM1_DATA_AVAIL 0x40
205 #define OEM2_DATA_AVAIL 0x80
206 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
209 unsigned char msg_flags
;
211 /* Does the BMC have an event buffer? */
212 bool has_event_buffer
;
215 * If set to true, this will request events the next time the
216 * state machine is idle.
221 * If true, run the state machine to completion on every send
222 * call. Generally used after a panic to make sure stuff goes
225 bool run_to_completion
;
227 /* The I/O port of an SI interface. */
231 * The space between start addresses of the two ports. For
232 * instance, if the first port is 0xca2 and the spacing is 4, then
233 * the second port is 0xca6.
235 unsigned int spacing
;
237 /* zero if no irq; */
240 /* The timer for this si. */
241 struct timer_list si_timer
;
243 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
246 /* The time (in jiffies) the last timeout occurred at. */
247 unsigned long last_timeout_jiffies
;
249 /* Are we waiting for the events, pretimeouts, received msgs? */
253 * The driver will disable interrupts when it gets into a
254 * situation where it cannot handle messages due to lack of
255 * memory. Once that situation clears up, it will re-enable
258 bool interrupt_disabled
;
261 * Does the BMC support events?
263 bool supports_event_msg_buff
;
266 * Can we disable interrupts the global enables receive irq
267 * bit? There are currently two forms of brokenness, some
268 * systems cannot disable the bit (which is technically within
269 * the spec but a bad idea) and some systems have the bit
270 * forced to zero even though interrupts work (which is
271 * clearly outside the spec). The next bool tells which form
272 * of brokenness is present.
274 bool cannot_disable_irq
;
277 * Some systems are broken and cannot set the irq enable
278 * bit, even if they support interrupts.
280 bool irq_enable_broken
;
283 * Did we get an attention that we did not handle?
287 /* From the get device id response... */
288 struct ipmi_device_id device_id
;
290 /* Driver model stuff. */
292 struct platform_device
*pdev
;
295 * True if we allocated the device, false if it came from
296 * someplace else (like PCI).
300 /* Slave address, could be reported from DMI. */
301 unsigned char slave_addr
;
303 /* Counters and things for the proc filesystem. */
304 atomic_t stats
[SI_NUM_STATS
];
306 struct task_struct
*thread
;
308 struct list_head link
;
309 union ipmi_smi_info_union addr_info
;
312 #define smi_inc_stat(smi, stat) \
313 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
314 #define smi_get_stat(smi, stat) \
315 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
317 #define SI_MAX_PARMS 4
319 static int force_kipmid
[SI_MAX_PARMS
];
320 static int num_force_kipmid
;
322 static bool pci_registered
;
325 static bool parisc_registered
;
328 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
329 static int num_max_busy_us
;
331 static bool unload_when_empty
= true;
333 static int add_smi(struct smi_info
*smi
);
334 static int try_smi_init(struct smi_info
*smi
);
335 static void cleanup_one_si(struct smi_info
*to_clean
);
336 static void cleanup_ipmi_si(void);
339 void debug_timestamp(char *msg
)
343 getnstimeofday64(&t
);
344 pr_debug("**%s: %lld.%9.9ld\n", msg
, (long long) t
.tv_sec
, t
.tv_nsec
);
347 #define debug_timestamp(x)
350 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
351 static int register_xaction_notifier(struct notifier_block
*nb
)
353 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
356 static void deliver_recv_msg(struct smi_info
*smi_info
,
357 struct ipmi_smi_msg
*msg
)
359 /* Deliver the message to the upper layer. */
361 ipmi_smi_msg_received(smi_info
->intf
, msg
);
363 ipmi_free_smi_msg(msg
);
366 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
368 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
370 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
371 cCode
= IPMI_ERR_UNSPECIFIED
;
372 /* else use it as is */
374 /* Make it a response */
375 msg
->rsp
[0] = msg
->data
[0] | 4;
376 msg
->rsp
[1] = msg
->data
[1];
380 smi_info
->curr_msg
= NULL
;
381 deliver_recv_msg(smi_info
, msg
);
384 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
388 if (!smi_info
->waiting_msg
) {
389 smi_info
->curr_msg
= NULL
;
394 smi_info
->curr_msg
= smi_info
->waiting_msg
;
395 smi_info
->waiting_msg
= NULL
;
396 debug_timestamp("Start2");
397 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
399 if (err
& NOTIFY_STOP_MASK
) {
400 rv
= SI_SM_CALL_WITHOUT_DELAY
;
403 err
= smi_info
->handlers
->start_transaction(
405 smi_info
->curr_msg
->data
,
406 smi_info
->curr_msg
->data_size
);
408 return_hosed_msg(smi_info
, err
);
410 rv
= SI_SM_CALL_WITHOUT_DELAY
;
416 static void smi_mod_timer(struct smi_info
*smi_info
, unsigned long new_val
)
418 smi_info
->last_timeout_jiffies
= jiffies
;
419 mod_timer(&smi_info
->si_timer
, new_val
);
420 smi_info
->timer_running
= true;
424 * Start a new message and (re)start the timer and thread.
426 static void start_new_msg(struct smi_info
*smi_info
, unsigned char *msg
,
429 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
431 if (smi_info
->thread
)
432 wake_up_process(smi_info
->thread
);
434 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, size
);
437 static void start_check_enables(struct smi_info
*smi_info
, bool start_timer
)
439 unsigned char msg
[2];
441 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
442 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
445 start_new_msg(smi_info
, msg
, 2);
447 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
448 smi_info
->si_state
= SI_CHECKING_ENABLES
;
451 static void start_clear_flags(struct smi_info
*smi_info
, bool start_timer
)
453 unsigned char msg
[3];
455 /* Make sure the watchdog pre-timeout flag is not set at startup. */
456 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
457 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
458 msg
[2] = WDT_PRE_TIMEOUT_INT
;
461 start_new_msg(smi_info
, msg
, 3);
463 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
464 smi_info
->si_state
= SI_CLEARING_FLAGS
;
467 static void start_getting_msg_queue(struct smi_info
*smi_info
)
469 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
470 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
471 smi_info
->curr_msg
->data_size
= 2;
473 start_new_msg(smi_info
, smi_info
->curr_msg
->data
,
474 smi_info
->curr_msg
->data_size
);
475 smi_info
->si_state
= SI_GETTING_MESSAGES
;
478 static void start_getting_events(struct smi_info
*smi_info
)
480 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
481 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
482 smi_info
->curr_msg
->data_size
= 2;
484 start_new_msg(smi_info
, smi_info
->curr_msg
->data
,
485 smi_info
->curr_msg
->data_size
);
486 smi_info
->si_state
= SI_GETTING_EVENTS
;
490 * When we have a situtaion where we run out of memory and cannot
491 * allocate messages, we just leave them in the BMC and run the system
492 * polled until we can allocate some memory. Once we have some
493 * memory, we will re-enable the interrupt.
495 * Note that we cannot just use disable_irq(), since the interrupt may
498 static inline bool disable_si_irq(struct smi_info
*smi_info
, bool start_timer
)
500 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
501 smi_info
->interrupt_disabled
= true;
502 start_check_enables(smi_info
, start_timer
);
508 static inline bool enable_si_irq(struct smi_info
*smi_info
)
510 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
511 smi_info
->interrupt_disabled
= false;
512 start_check_enables(smi_info
, true);
519 * Allocate a message. If unable to allocate, start the interrupt
520 * disable process and return NULL. If able to allocate but
521 * interrupts are disabled, free the message and return NULL after
522 * starting the interrupt enable process.
524 static struct ipmi_smi_msg
*alloc_msg_handle_irq(struct smi_info
*smi_info
)
526 struct ipmi_smi_msg
*msg
;
528 msg
= ipmi_alloc_smi_msg();
530 if (!disable_si_irq(smi_info
, true))
531 smi_info
->si_state
= SI_NORMAL
;
532 } else if (enable_si_irq(smi_info
)) {
533 ipmi_free_smi_msg(msg
);
539 static void handle_flags(struct smi_info
*smi_info
)
542 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
543 /* Watchdog pre-timeout */
544 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
546 start_clear_flags(smi_info
, true);
547 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
549 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
550 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
551 /* Messages available. */
552 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
553 if (!smi_info
->curr_msg
)
556 start_getting_msg_queue(smi_info
);
557 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
558 /* Events available. */
559 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
560 if (!smi_info
->curr_msg
)
563 start_getting_events(smi_info
);
564 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
565 smi_info
->oem_data_avail_handler
) {
566 if (smi_info
->oem_data_avail_handler(smi_info
))
569 smi_info
->si_state
= SI_NORMAL
;
573 * Global enables we care about.
575 #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
576 IPMI_BMC_EVT_MSG_INTR)
578 static u8
current_global_enables(struct smi_info
*smi_info
, u8 base
,
583 if (smi_info
->supports_event_msg_buff
)
584 enables
|= IPMI_BMC_EVT_MSG_BUFF
;
586 if (((smi_info
->irq
&& !smi_info
->interrupt_disabled
) ||
587 smi_info
->cannot_disable_irq
) &&
588 !smi_info
->irq_enable_broken
)
589 enables
|= IPMI_BMC_RCV_MSG_INTR
;
591 if (smi_info
->supports_event_msg_buff
&&
592 smi_info
->irq
&& !smi_info
->interrupt_disabled
&&
593 !smi_info
->irq_enable_broken
)
594 enables
|= IPMI_BMC_EVT_MSG_INTR
;
596 *irq_on
= enables
& (IPMI_BMC_EVT_MSG_INTR
| IPMI_BMC_RCV_MSG_INTR
);
601 static void check_bt_irq(struct smi_info
*smi_info
, bool irq_on
)
603 u8 irqstate
= smi_info
->io
.inputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
);
605 irqstate
&= IPMI_BT_INTMASK_ENABLE_IRQ_BIT
;
607 if ((bool)irqstate
== irq_on
)
611 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
612 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
614 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
, 0);
617 static void handle_transaction_done(struct smi_info
*smi_info
)
619 struct ipmi_smi_msg
*msg
;
621 debug_timestamp("Done");
622 switch (smi_info
->si_state
) {
624 if (!smi_info
->curr_msg
)
627 smi_info
->curr_msg
->rsp_size
628 = smi_info
->handlers
->get_result(
630 smi_info
->curr_msg
->rsp
,
631 IPMI_MAX_MSG_LENGTH
);
634 * Do this here becase deliver_recv_msg() releases the
635 * lock, and a new message can be put in during the
636 * time the lock is released.
638 msg
= smi_info
->curr_msg
;
639 smi_info
->curr_msg
= NULL
;
640 deliver_recv_msg(smi_info
, msg
);
643 case SI_GETTING_FLAGS
:
645 unsigned char msg
[4];
648 /* We got the flags from the SMI, now handle them. */
649 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
651 /* Error fetching flags, just give up for now. */
652 smi_info
->si_state
= SI_NORMAL
;
653 } else if (len
< 4) {
655 * Hmm, no flags. That's technically illegal, but
656 * don't use uninitialized data.
658 smi_info
->si_state
= SI_NORMAL
;
660 smi_info
->msg_flags
= msg
[3];
661 handle_flags(smi_info
);
666 case SI_CLEARING_FLAGS
:
668 unsigned char msg
[3];
670 /* We cleared the flags. */
671 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
673 /* Error clearing flags */
674 dev_warn(smi_info
->dev
,
675 "Error clearing flags: %2.2x\n", msg
[2]);
677 smi_info
->si_state
= SI_NORMAL
;
681 case SI_GETTING_EVENTS
:
683 smi_info
->curr_msg
->rsp_size
684 = smi_info
->handlers
->get_result(
686 smi_info
->curr_msg
->rsp
,
687 IPMI_MAX_MSG_LENGTH
);
690 * Do this here becase deliver_recv_msg() releases the
691 * lock, and a new message can be put in during the
692 * time the lock is released.
694 msg
= smi_info
->curr_msg
;
695 smi_info
->curr_msg
= NULL
;
696 if (msg
->rsp
[2] != 0) {
697 /* Error getting event, probably done. */
700 /* Take off the event flag. */
701 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
702 handle_flags(smi_info
);
704 smi_inc_stat(smi_info
, events
);
707 * Do this before we deliver the message
708 * because delivering the message releases the
709 * lock and something else can mess with the
712 handle_flags(smi_info
);
714 deliver_recv_msg(smi_info
, msg
);
719 case SI_GETTING_MESSAGES
:
721 smi_info
->curr_msg
->rsp_size
722 = smi_info
->handlers
->get_result(
724 smi_info
->curr_msg
->rsp
,
725 IPMI_MAX_MSG_LENGTH
);
728 * Do this here becase deliver_recv_msg() releases the
729 * lock, and a new message can be put in during the
730 * time the lock is released.
732 msg
= smi_info
->curr_msg
;
733 smi_info
->curr_msg
= NULL
;
734 if (msg
->rsp
[2] != 0) {
735 /* Error getting event, probably done. */
738 /* Take off the msg flag. */
739 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
740 handle_flags(smi_info
);
742 smi_inc_stat(smi_info
, incoming_messages
);
745 * Do this before we deliver the message
746 * because delivering the message releases the
747 * lock and something else can mess with the
750 handle_flags(smi_info
);
752 deliver_recv_msg(smi_info
, msg
);
757 case SI_CHECKING_ENABLES
:
759 unsigned char msg
[4];
763 /* We got the flags from the SMI, now handle them. */
764 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
766 dev_warn(smi_info
->dev
,
767 "Couldn't get irq info: %x.\n", msg
[2]);
768 dev_warn(smi_info
->dev
,
769 "Maybe ok, but ipmi might run very slowly.\n");
770 smi_info
->si_state
= SI_NORMAL
;
773 enables
= current_global_enables(smi_info
, 0, &irq_on
);
774 if (smi_info
->si_type
== SI_BT
)
775 /* BT has its own interrupt enable bit. */
776 check_bt_irq(smi_info
, irq_on
);
777 if (enables
!= (msg
[3] & GLOBAL_ENABLES_MASK
)) {
778 /* Enables are not correct, fix them. */
779 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
780 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
781 msg
[2] = enables
| (msg
[3] & ~GLOBAL_ENABLES_MASK
);
782 smi_info
->handlers
->start_transaction(
783 smi_info
->si_sm
, msg
, 3);
784 smi_info
->si_state
= SI_SETTING_ENABLES
;
785 } else if (smi_info
->supports_event_msg_buff
) {
786 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
787 if (!smi_info
->curr_msg
) {
788 smi_info
->si_state
= SI_NORMAL
;
791 start_getting_msg_queue(smi_info
);
793 smi_info
->si_state
= SI_NORMAL
;
798 case SI_SETTING_ENABLES
:
800 unsigned char msg
[4];
802 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
804 dev_warn(smi_info
->dev
,
805 "Could not set the global enables: 0x%x.\n",
808 if (smi_info
->supports_event_msg_buff
) {
809 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
810 if (!smi_info
->curr_msg
) {
811 smi_info
->si_state
= SI_NORMAL
;
814 start_getting_msg_queue(smi_info
);
816 smi_info
->si_state
= SI_NORMAL
;
824 * Called on timeouts and events. Timeouts should pass the elapsed
825 * time, interrupts should pass in zero. Must be called with
826 * si_lock held and interrupts disabled.
828 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
831 enum si_sm_result si_sm_result
;
835 * There used to be a loop here that waited a little while
836 * (around 25us) before giving up. That turned out to be
837 * pointless, the minimum delays I was seeing were in the 300us
838 * range, which is far too long to wait in an interrupt. So
839 * we just run until the state machine tells us something
840 * happened or it needs a delay.
842 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
844 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
845 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
847 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
848 smi_inc_stat(smi_info
, complete_transactions
);
850 handle_transaction_done(smi_info
);
851 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
852 } else if (si_sm_result
== SI_SM_HOSED
) {
853 smi_inc_stat(smi_info
, hosed_count
);
856 * Do the before return_hosed_msg, because that
859 smi_info
->si_state
= SI_NORMAL
;
860 if (smi_info
->curr_msg
!= NULL
) {
862 * If we were handling a user message, format
863 * a response to send to the upper layer to
864 * tell it about the error.
866 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
868 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
872 * We prefer handling attn over new messages. But don't do
873 * this if there is not yet an upper layer to handle anything.
875 if (likely(smi_info
->intf
) &&
876 (si_sm_result
== SI_SM_ATTN
|| smi_info
->got_attn
)) {
877 unsigned char msg
[2];
879 if (smi_info
->si_state
!= SI_NORMAL
) {
881 * We got an ATTN, but we are doing something else.
882 * Handle the ATTN later.
884 smi_info
->got_attn
= true;
886 smi_info
->got_attn
= false;
887 smi_inc_stat(smi_info
, attentions
);
890 * Got a attn, send down a get message flags to see
891 * what's causing it. It would be better to handle
892 * this in the upper layer, but due to the way
893 * interrupts work with the SMI, that's not really
896 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
897 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
899 start_new_msg(smi_info
, msg
, 2);
900 smi_info
->si_state
= SI_GETTING_FLAGS
;
905 /* If we are currently idle, try to start the next message. */
906 if (si_sm_result
== SI_SM_IDLE
) {
907 smi_inc_stat(smi_info
, idles
);
909 si_sm_result
= start_next_msg(smi_info
);
910 if (si_sm_result
!= SI_SM_IDLE
)
914 if ((si_sm_result
== SI_SM_IDLE
)
915 && (atomic_read(&smi_info
->req_events
))) {
917 * We are idle and the upper layer requested that I fetch
920 atomic_set(&smi_info
->req_events
, 0);
923 * Take this opportunity to check the interrupt and
924 * message enable state for the BMC. The BMC can be
925 * asynchronously reset, and may thus get interrupts
926 * disable and messages disabled.
928 if (smi_info
->supports_event_msg_buff
|| smi_info
->irq
) {
929 start_check_enables(smi_info
, true);
931 smi_info
->curr_msg
= alloc_msg_handle_irq(smi_info
);
932 if (!smi_info
->curr_msg
)
935 start_getting_events(smi_info
);
940 if (si_sm_result
== SI_SM_IDLE
&& smi_info
->timer_running
) {
941 /* Ok it if fails, the timer will just go off. */
942 if (del_timer(&smi_info
->si_timer
))
943 smi_info
->timer_running
= false;
950 static void check_start_timer_thread(struct smi_info
*smi_info
)
952 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
) {
953 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
955 if (smi_info
->thread
)
956 wake_up_process(smi_info
->thread
);
958 start_next_msg(smi_info
);
959 smi_event_handler(smi_info
, 0);
963 static void flush_messages(void *send_info
)
965 struct smi_info
*smi_info
= send_info
;
966 enum si_sm_result result
;
969 * Currently, this function is called only in run-to-completion
970 * mode. This means we are single-threaded, no need for locks.
972 result
= smi_event_handler(smi_info
, 0);
973 while (result
!= SI_SM_IDLE
) {
974 udelay(SI_SHORT_TIMEOUT_USEC
);
975 result
= smi_event_handler(smi_info
, SI_SHORT_TIMEOUT_USEC
);
979 static void sender(void *send_info
,
980 struct ipmi_smi_msg
*msg
)
982 struct smi_info
*smi_info
= send_info
;
985 debug_timestamp("Enqueue");
987 if (smi_info
->run_to_completion
) {
989 * If we are running to completion, start it. Upper
990 * layer will call flush_messages to clear it out.
992 smi_info
->waiting_msg
= msg
;
996 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
998 * The following two lines don't need to be under the lock for
999 * the lock's sake, but they do need SMP memory barriers to
1000 * avoid getting things out of order. We are already claiming
1001 * the lock, anyway, so just do it under the lock to avoid the
1004 BUG_ON(smi_info
->waiting_msg
);
1005 smi_info
->waiting_msg
= msg
;
1006 check_start_timer_thread(smi_info
);
1007 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1010 static void set_run_to_completion(void *send_info
, bool i_run_to_completion
)
1012 struct smi_info
*smi_info
= send_info
;
1014 smi_info
->run_to_completion
= i_run_to_completion
;
1015 if (i_run_to_completion
)
1016 flush_messages(smi_info
);
1020 * Use -1 in the nsec value of the busy waiting timespec to tell that
1021 * we are spinning in kipmid looking for something and not delaying
1024 static inline void ipmi_si_set_not_busy(struct timespec64
*ts
)
1028 static inline int ipmi_si_is_busy(struct timespec64
*ts
)
1030 return ts
->tv_nsec
!= -1;
1033 static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result
,
1034 const struct smi_info
*smi_info
,
1035 struct timespec64
*busy_until
)
1037 unsigned int max_busy_us
= 0;
1039 if (smi_info
->intf_num
< num_max_busy_us
)
1040 max_busy_us
= kipmid_max_busy_us
[smi_info
->intf_num
];
1041 if (max_busy_us
== 0 || smi_result
!= SI_SM_CALL_WITH_DELAY
)
1042 ipmi_si_set_not_busy(busy_until
);
1043 else if (!ipmi_si_is_busy(busy_until
)) {
1044 getnstimeofday64(busy_until
);
1045 timespec64_add_ns(busy_until
, max_busy_us
*NSEC_PER_USEC
);
1047 struct timespec64 now
;
1049 getnstimeofday64(&now
);
1050 if (unlikely(timespec64_compare(&now
, busy_until
) > 0)) {
1051 ipmi_si_set_not_busy(busy_until
);
1060 * A busy-waiting loop for speeding up IPMI operation.
1062 * Lousy hardware makes this hard. This is only enabled for systems
1063 * that are not BT and do not have interrupts. It starts spinning
1064 * when an operation is complete or until max_busy tells it to stop
1065 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1066 * Documentation/IPMI.txt for details.
1068 static int ipmi_thread(void *data
)
1070 struct smi_info
*smi_info
= data
;
1071 unsigned long flags
;
1072 enum si_sm_result smi_result
;
1073 struct timespec64 busy_until
;
1075 ipmi_si_set_not_busy(&busy_until
);
1076 set_user_nice(current
, MAX_NICE
);
1077 while (!kthread_should_stop()) {
1080 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1081 smi_result
= smi_event_handler(smi_info
, 0);
1084 * If the driver is doing something, there is a possible
1085 * race with the timer. If the timer handler see idle,
1086 * and the thread here sees something else, the timer
1087 * handler won't restart the timer even though it is
1088 * required. So start it here if necessary.
1090 if (smi_result
!= SI_SM_IDLE
&& !smi_info
->timer_running
)
1091 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1093 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1094 busy_wait
= ipmi_thread_busy_wait(smi_result
, smi_info
,
1096 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
1098 else if (smi_result
== SI_SM_CALL_WITH_DELAY
&& busy_wait
)
1100 else if (smi_result
== SI_SM_IDLE
) {
1101 if (atomic_read(&smi_info
->need_watch
)) {
1102 schedule_timeout_interruptible(100);
1104 /* Wait to be woken up when we are needed. */
1105 __set_current_state(TASK_INTERRUPTIBLE
);
1109 schedule_timeout_interruptible(1);
1115 static void poll(void *send_info
)
1117 struct smi_info
*smi_info
= send_info
;
1118 unsigned long flags
= 0;
1119 bool run_to_completion
= smi_info
->run_to_completion
;
1122 * Make sure there is some delay in the poll loop so we can
1123 * drive time forward and timeout things.
1126 if (!run_to_completion
)
1127 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1128 smi_event_handler(smi_info
, 10);
1129 if (!run_to_completion
)
1130 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1133 static void request_events(void *send_info
)
1135 struct smi_info
*smi_info
= send_info
;
1137 if (!smi_info
->has_event_buffer
)
1140 atomic_set(&smi_info
->req_events
, 1);
1143 static void set_need_watch(void *send_info
, bool enable
)
1145 struct smi_info
*smi_info
= send_info
;
1146 unsigned long flags
;
1148 atomic_set(&smi_info
->need_watch
, enable
);
1149 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1150 check_start_timer_thread(smi_info
);
1151 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1154 static int initialized
;
1156 static void smi_timeout(unsigned long data
)
1158 struct smi_info
*smi_info
= (struct smi_info
*) data
;
1159 enum si_sm_result smi_result
;
1160 unsigned long flags
;
1161 unsigned long jiffies_now
;
1165 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1166 debug_timestamp("Timer");
1168 jiffies_now
= jiffies
;
1169 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
1170 * SI_USEC_PER_JIFFY
);
1171 smi_result
= smi_event_handler(smi_info
, time_diff
);
1173 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1174 /* Running with interrupts, only do long timeouts. */
1175 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1176 smi_inc_stat(smi_info
, long_timeouts
);
1181 * If the state machine asks for a short delay, then shorten
1182 * the timer timeout.
1184 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1185 smi_inc_stat(smi_info
, short_timeouts
);
1186 timeout
= jiffies
+ 1;
1188 smi_inc_stat(smi_info
, long_timeouts
);
1189 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1193 if (smi_result
!= SI_SM_IDLE
)
1194 smi_mod_timer(smi_info
, timeout
);
1196 smi_info
->timer_running
= false;
1197 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1200 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1202 struct smi_info
*smi_info
= data
;
1203 unsigned long flags
;
1205 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1207 smi_inc_stat(smi_info
, interrupts
);
1209 debug_timestamp("Interrupt");
1211 smi_event_handler(smi_info
, 0);
1212 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1216 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1218 struct smi_info
*smi_info
= data
;
1219 /* We need to clear the IRQ flag for the BT interface. */
1220 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1221 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1222 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1223 return si_irq_handler(irq
, data
);
1226 static int smi_start_processing(void *send_info
,
1229 struct smi_info
*new_smi
= send_info
;
1232 new_smi
->intf
= intf
;
1234 /* Set up the timer that drives the interface. */
1235 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1236 smi_mod_timer(new_smi
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1238 /* Try to claim any interrupts. */
1239 if (new_smi
->irq_setup
)
1240 new_smi
->irq_setup(new_smi
);
1243 * Check if the user forcefully enabled the daemon.
1245 if (new_smi
->intf_num
< num_force_kipmid
)
1246 enable
= force_kipmid
[new_smi
->intf_num
];
1248 * The BT interface is efficient enough to not need a thread,
1249 * and there is no need for a thread if we have interrupts.
1251 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1255 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1256 "kipmi%d", new_smi
->intf_num
);
1257 if (IS_ERR(new_smi
->thread
)) {
1258 dev_notice(new_smi
->dev
, "Could not start"
1259 " kernel thread due to error %ld, only using"
1260 " timers to drive the interface\n",
1261 PTR_ERR(new_smi
->thread
));
1262 new_smi
->thread
= NULL
;
1269 static int get_smi_info(void *send_info
, struct ipmi_smi_info
*data
)
1271 struct smi_info
*smi
= send_info
;
1273 data
->addr_src
= smi
->addr_source
;
1274 data
->dev
= smi
->dev
;
1275 data
->addr_info
= smi
->addr_info
;
1276 get_device(smi
->dev
);
1281 static void set_maintenance_mode(void *send_info
, bool enable
)
1283 struct smi_info
*smi_info
= send_info
;
1286 atomic_set(&smi_info
->req_events
, 0);
1289 static const struct ipmi_smi_handlers handlers
= {
1290 .owner
= THIS_MODULE
,
1291 .start_processing
= smi_start_processing
,
1292 .get_smi_info
= get_smi_info
,
1294 .request_events
= request_events
,
1295 .set_need_watch
= set_need_watch
,
1296 .set_maintenance_mode
= set_maintenance_mode
,
1297 .set_run_to_completion
= set_run_to_completion
,
1298 .flush_messages
= flush_messages
,
1303 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1304 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1307 static LIST_HEAD(smi_infos
);
1308 static DEFINE_MUTEX(smi_infos_lock
);
1309 static int smi_num
; /* Used to sequence the SMIs */
1311 #define DEFAULT_REGSPACING 1
1312 #define DEFAULT_REGSIZE 1
1315 static bool si_tryacpi
= true;
1318 static bool si_trydmi
= true;
1320 static bool si_tryplatform
= true;
1322 static bool si_trypci
= true;
1324 static bool si_trydefaults
= IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS
);
1325 static char *si_type
[SI_MAX_PARMS
];
1326 #define MAX_SI_TYPE_STR 30
1327 static char si_type_str
[MAX_SI_TYPE_STR
];
1328 static unsigned long addrs
[SI_MAX_PARMS
];
1329 static unsigned int num_addrs
;
1330 static unsigned int ports
[SI_MAX_PARMS
];
1331 static unsigned int num_ports
;
1332 static int irqs
[SI_MAX_PARMS
];
1333 static unsigned int num_irqs
;
1334 static int regspacings
[SI_MAX_PARMS
];
1335 static unsigned int num_regspacings
;
1336 static int regsizes
[SI_MAX_PARMS
];
1337 static unsigned int num_regsizes
;
1338 static int regshifts
[SI_MAX_PARMS
];
1339 static unsigned int num_regshifts
;
1340 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1341 static unsigned int num_slave_addrs
;
1343 #define IPMI_IO_ADDR_SPACE 0
1344 #define IPMI_MEM_ADDR_SPACE 1
1345 static const char * const addr_space_to_str
[] = { "i/o", "mem" };
1347 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1349 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1350 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1351 " Documentation/IPMI.txt in the kernel sources for the"
1355 module_param_named(tryacpi
, si_tryacpi
, bool, 0);
1356 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1357 " default scan of the interfaces identified via ACPI");
1360 module_param_named(trydmi
, si_trydmi
, bool, 0);
1361 MODULE_PARM_DESC(trydmi
, "Setting this to zero will disable the"
1362 " default scan of the interfaces identified via DMI");
1364 module_param_named(tryplatform
, si_tryplatform
, bool, 0);
1365 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1366 " default scan of the interfaces identified via platform"
1367 " interfaces like openfirmware");
1369 module_param_named(trypci
, si_trypci
, bool, 0);
1370 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1371 " default scan of the interfaces identified via pci");
1373 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1374 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1375 " default scan of the KCS and SMIC interface at the standard"
1377 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1378 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1379 " interface separated by commas. The types are 'kcs',"
1380 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1381 " the first interface to kcs and the second to bt");
1382 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1383 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1384 " addresses separated by commas. Only use if an interface"
1385 " is in memory. Otherwise, set it to zero or leave"
1387 module_param_array(ports
, uint
, &num_ports
, 0);
1388 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1389 " addresses separated by commas. Only use if an interface"
1390 " is a port. Otherwise, set it to zero or leave"
1392 module_param_array(irqs
, int, &num_irqs
, 0);
1393 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1394 " addresses separated by commas. Only use if an interface"
1395 " has an interrupt. Otherwise, set it to zero or leave"
1397 module_param_array(regspacings
, int, &num_regspacings
, 0);
1398 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1399 " and each successive register used by the interface. For"
1400 " instance, if the start address is 0xca2 and the spacing"
1401 " is 2, then the second address is at 0xca4. Defaults"
1403 module_param_array(regsizes
, int, &num_regsizes
, 0);
1404 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1405 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1406 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1407 " the 8-bit IPMI register has to be read from a larger"
1409 module_param_array(regshifts
, int, &num_regshifts
, 0);
1410 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1411 " IPMI register, in bits. For instance, if the data"
1412 " is read from a 32-bit word and the IPMI data is in"
1413 " bit 8-15, then the shift would be 8");
1414 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1415 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1416 " the controller. Normally this is 0x20, but can be"
1417 " overridden by this parm. This is an array indexed"
1418 " by interface number.");
1419 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1420 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1421 " disabled(0). Normally the IPMI driver auto-detects"
1422 " this, but the value may be overridden by this parm.");
1423 module_param(unload_when_empty
, bool, 0);
1424 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1425 " specified or found, default is 1. Setting to 0"
1426 " is useful for hot add of devices using hotmod.");
1427 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1428 MODULE_PARM_DESC(kipmid_max_busy_us
,
1429 "Max time (in microseconds) to busy-wait for IPMI data before"
1430 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1431 " if kipmid is using up a lot of CPU time.");
1434 static void std_irq_cleanup(struct smi_info
*info
)
1436 if (info
->si_type
== SI_BT
)
1437 /* Disable the interrupt in the BT interface. */
1438 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1439 free_irq(info
->irq
, info
);
1442 static int std_irq_setup(struct smi_info
*info
)
1449 if (info
->si_type
== SI_BT
) {
1450 rv
= request_irq(info
->irq
,
1456 /* Enable the interrupt in the BT interface. */
1457 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1458 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1460 rv
= request_irq(info
->irq
,
1466 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1467 " running polled\n",
1468 DEVICE_NAME
, info
->irq
);
1471 info
->irq_cleanup
= std_irq_cleanup
;
1472 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1478 static unsigned char port_inb(const struct si_sm_io
*io
, unsigned int offset
)
1480 unsigned int addr
= io
->addr_data
;
1482 return inb(addr
+ (offset
* io
->regspacing
));
1485 static void port_outb(const struct si_sm_io
*io
, unsigned int offset
,
1488 unsigned int addr
= io
->addr_data
;
1490 outb(b
, addr
+ (offset
* io
->regspacing
));
1493 static unsigned char port_inw(const struct si_sm_io
*io
, unsigned int offset
)
1495 unsigned int addr
= io
->addr_data
;
1497 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1500 static void port_outw(const struct si_sm_io
*io
, unsigned int offset
,
1503 unsigned int addr
= io
->addr_data
;
1505 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1508 static unsigned char port_inl(const struct si_sm_io
*io
, unsigned int offset
)
1510 unsigned int addr
= io
->addr_data
;
1512 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1515 static void port_outl(const struct si_sm_io
*io
, unsigned int offset
,
1518 unsigned int addr
= io
->addr_data
;
1520 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1523 static void port_cleanup(struct smi_info
*info
)
1525 unsigned int addr
= info
->io
.addr_data
;
1529 for (idx
= 0; idx
< info
->io_size
; idx
++)
1530 release_region(addr
+ idx
* info
->io
.regspacing
,
1535 static int port_setup(struct smi_info
*info
)
1537 unsigned int addr
= info
->io
.addr_data
;
1543 info
->io_cleanup
= port_cleanup
;
1546 * Figure out the actual inb/inw/inl/etc routine to use based
1547 * upon the register size.
1549 switch (info
->io
.regsize
) {
1551 info
->io
.inputb
= port_inb
;
1552 info
->io
.outputb
= port_outb
;
1555 info
->io
.inputb
= port_inw
;
1556 info
->io
.outputb
= port_outw
;
1559 info
->io
.inputb
= port_inl
;
1560 info
->io
.outputb
= port_outl
;
1563 dev_warn(info
->dev
, "Invalid register size: %d\n",
1569 * Some BIOSes reserve disjoint I/O regions in their ACPI
1570 * tables. This causes problems when trying to register the
1571 * entire I/O region. Therefore we must register each I/O
1574 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1575 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1576 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1577 /* Undo allocations */
1579 release_region(addr
+ idx
* info
->io
.regspacing
,
1588 static unsigned char intf_mem_inb(const struct si_sm_io
*io
,
1589 unsigned int offset
)
1591 return readb((io
->addr
)+(offset
* io
->regspacing
));
1594 static void intf_mem_outb(const struct si_sm_io
*io
, unsigned int offset
,
1597 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1600 static unsigned char intf_mem_inw(const struct si_sm_io
*io
,
1601 unsigned int offset
)
1603 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1607 static void intf_mem_outw(const struct si_sm_io
*io
, unsigned int offset
,
1610 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1613 static unsigned char intf_mem_inl(const struct si_sm_io
*io
,
1614 unsigned int offset
)
1616 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1620 static void intf_mem_outl(const struct si_sm_io
*io
, unsigned int offset
,
1623 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1627 static unsigned char mem_inq(const struct si_sm_io
*io
, unsigned int offset
)
1629 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1633 static void mem_outq(const struct si_sm_io
*io
, unsigned int offset
,
1636 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1640 static void mem_cleanup(struct smi_info
*info
)
1642 unsigned long addr
= info
->io
.addr_data
;
1645 if (info
->io
.addr
) {
1646 iounmap(info
->io
.addr
);
1648 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1649 - (info
->io
.regspacing
- info
->io
.regsize
));
1651 release_mem_region(addr
, mapsize
);
1655 static int mem_setup(struct smi_info
*info
)
1657 unsigned long addr
= info
->io
.addr_data
;
1663 info
->io_cleanup
= mem_cleanup
;
1666 * Figure out the actual readb/readw/readl/etc routine to use based
1667 * upon the register size.
1669 switch (info
->io
.regsize
) {
1671 info
->io
.inputb
= intf_mem_inb
;
1672 info
->io
.outputb
= intf_mem_outb
;
1675 info
->io
.inputb
= intf_mem_inw
;
1676 info
->io
.outputb
= intf_mem_outw
;
1679 info
->io
.inputb
= intf_mem_inl
;
1680 info
->io
.outputb
= intf_mem_outl
;
1684 info
->io
.inputb
= mem_inq
;
1685 info
->io
.outputb
= mem_outq
;
1689 dev_warn(info
->dev
, "Invalid register size: %d\n",
1695 * Calculate the total amount of memory to claim. This is an
1696 * unusual looking calculation, but it avoids claiming any
1697 * more memory than it has to. It will claim everything
1698 * between the first address to the end of the last full
1701 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1702 - (info
->io
.regspacing
- info
->io
.regsize
));
1704 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1707 info
->io
.addr
= ioremap(addr
, mapsize
);
1708 if (info
->io
.addr
== NULL
) {
1709 release_mem_region(addr
, mapsize
);
1716 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1717 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1725 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1726 struct hotmod_vals
{
1731 static const struct hotmod_vals hotmod_ops
[] = {
1733 { "remove", HM_REMOVE
},
1737 static const struct hotmod_vals hotmod_si
[] = {
1739 { "smic", SI_SMIC
},
1744 static const struct hotmod_vals hotmod_as
[] = {
1745 { "mem", IPMI_MEM_ADDR_SPACE
},
1746 { "i/o", IPMI_IO_ADDR_SPACE
},
1750 static int parse_str(const struct hotmod_vals
*v
, int *val
, char *name
,
1756 s
= strchr(*curr
, ',');
1758 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1763 for (i
= 0; v
[i
].name
; i
++) {
1764 if (strcmp(*curr
, v
[i
].name
) == 0) {
1771 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1775 static int check_hotmod_int_op(const char *curr
, const char *option
,
1776 const char *name
, int *val
)
1780 if (strcmp(curr
, name
) == 0) {
1782 printk(KERN_WARNING PFX
1783 "No option given for '%s'\n",
1787 *val
= simple_strtoul(option
, &n
, 0);
1788 if ((*n
!= '\0') || (*option
== '\0')) {
1789 printk(KERN_WARNING PFX
1790 "Bad option given for '%s'\n",
1799 static struct smi_info
*smi_info_alloc(void)
1801 struct smi_info
*info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1804 spin_lock_init(&info
->si_lock
);
1808 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1810 char *str
= kstrdup(val
, GFP_KERNEL
);
1812 char *next
, *curr
, *s
, *n
, *o
;
1814 enum si_type si_type
;
1824 struct smi_info
*info
;
1829 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1832 while ((ival
>= 0) && isspace(str
[ival
])) {
1837 for (curr
= str
; curr
; curr
= next
) {
1842 ipmb
= 0; /* Choose the default if not specified */
1844 next
= strchr(curr
, ':');
1850 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1855 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1860 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1864 s
= strchr(curr
, ',');
1869 addr
= simple_strtoul(curr
, &n
, 0);
1870 if ((*n
!= '\0') || (*curr
== '\0')) {
1871 printk(KERN_WARNING PFX
"Invalid hotmod address"
1878 s
= strchr(curr
, ',');
1883 o
= strchr(curr
, '=');
1888 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1893 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1898 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1903 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1908 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1915 printk(KERN_WARNING PFX
1916 "Invalid hotmod option '%s'\n",
1922 info
= smi_info_alloc();
1928 info
->addr_source
= SI_HOTMOD
;
1929 info
->si_type
= si_type
;
1930 info
->io
.addr_data
= addr
;
1931 info
->io
.addr_type
= addr_space
;
1932 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1933 info
->io_setup
= mem_setup
;
1935 info
->io_setup
= port_setup
;
1937 info
->io
.addr
= NULL
;
1938 info
->io
.regspacing
= regspacing
;
1939 if (!info
->io
.regspacing
)
1940 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1941 info
->io
.regsize
= regsize
;
1942 if (!info
->io
.regsize
)
1943 info
->io
.regsize
= DEFAULT_REGSPACING
;
1944 info
->io
.regshift
= regshift
;
1947 info
->irq_setup
= std_irq_setup
;
1948 info
->slave_addr
= ipmb
;
1955 rv
= try_smi_init(info
);
1957 cleanup_one_si(info
);
1962 struct smi_info
*e
, *tmp_e
;
1964 mutex_lock(&smi_infos_lock
);
1965 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1966 if (e
->io
.addr_type
!= addr_space
)
1968 if (e
->si_type
!= si_type
)
1970 if (e
->io
.addr_data
== addr
)
1973 mutex_unlock(&smi_infos_lock
);
1982 static int hardcode_find_bmc(void)
1986 struct smi_info
*info
;
1988 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1989 if (!ports
[i
] && !addrs
[i
])
1992 info
= smi_info_alloc();
1996 info
->addr_source
= SI_HARDCODED
;
1997 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1999 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
2000 info
->si_type
= SI_KCS
;
2001 } else if (strcmp(si_type
[i
], "smic") == 0) {
2002 info
->si_type
= SI_SMIC
;
2003 } else if (strcmp(si_type
[i
], "bt") == 0) {
2004 info
->si_type
= SI_BT
;
2006 printk(KERN_WARNING PFX
"Interface type specified "
2007 "for interface %d, was invalid: %s\n",
2015 info
->io_setup
= port_setup
;
2016 info
->io
.addr_data
= ports
[i
];
2017 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2018 } else if (addrs
[i
]) {
2020 info
->io_setup
= mem_setup
;
2021 info
->io
.addr_data
= addrs
[i
];
2022 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2024 printk(KERN_WARNING PFX
"Interface type specified "
2025 "for interface %d, but port and address were "
2026 "not set or set to zero.\n", i
);
2031 info
->io
.addr
= NULL
;
2032 info
->io
.regspacing
= regspacings
[i
];
2033 if (!info
->io
.regspacing
)
2034 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2035 info
->io
.regsize
= regsizes
[i
];
2036 if (!info
->io
.regsize
)
2037 info
->io
.regsize
= DEFAULT_REGSPACING
;
2038 info
->io
.regshift
= regshifts
[i
];
2039 info
->irq
= irqs
[i
];
2041 info
->irq_setup
= std_irq_setup
;
2042 info
->slave_addr
= slave_addrs
[i
];
2044 if (!add_smi(info
)) {
2045 if (try_smi_init(info
))
2046 cleanup_one_si(info
);
2057 #include <linux/acpi.h>
2060 * Once we get an ACPI failure, we don't try any more, because we go
2061 * through the tables sequentially. Once we don't find a table, there
2064 static int acpi_failure
;
2066 /* For GPE-type interrupts. */
2067 static u32
ipmi_acpi_gpe(acpi_handle gpe_device
,
2068 u32 gpe_number
, void *context
)
2070 struct smi_info
*smi_info
= context
;
2071 unsigned long flags
;
2073 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
2075 smi_inc_stat(smi_info
, interrupts
);
2077 debug_timestamp("ACPI_GPE");
2079 smi_event_handler(smi_info
, 0);
2080 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
2082 return ACPI_INTERRUPT_HANDLED
;
2085 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
2090 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
2093 static int acpi_gpe_irq_setup(struct smi_info
*info
)
2100 status
= acpi_install_gpe_handler(NULL
,
2102 ACPI_GPE_LEVEL_TRIGGERED
,
2105 if (status
!= AE_OK
) {
2106 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
2107 " running polled\n", DEVICE_NAME
, info
->irq
);
2111 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
2112 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
2119 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2130 s8 CreatorRevision
[4];
2133 s16 SpecificationRevision
;
2136 * Bit 0 - SCI interrupt supported
2137 * Bit 1 - I/O APIC/SAPIC
2142 * If bit 0 of InterruptType is set, then this is the SCI
2143 * interrupt in the GPEx_STS register.
2150 * If bit 1 of InterruptType is set, then this is the I/O
2151 * APIC/SAPIC interrupt.
2153 u32 GlobalSystemInterrupt
;
2155 /* The actual register address. */
2156 struct acpi_generic_address addr
;
2160 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2163 static int try_init_spmi(struct SPMITable
*spmi
)
2165 struct smi_info
*info
;
2168 if (spmi
->IPMIlegacy
!= 1) {
2169 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2173 info
= smi_info_alloc();
2175 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2179 info
->addr_source
= SI_SPMI
;
2180 printk(KERN_INFO PFX
"probing via SPMI\n");
2182 /* Figure out the interface type. */
2183 switch (spmi
->InterfaceType
) {
2185 info
->si_type
= SI_KCS
;
2188 info
->si_type
= SI_SMIC
;
2191 info
->si_type
= SI_BT
;
2193 case 4: /* SSIF, just ignore */
2197 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2198 spmi
->InterfaceType
);
2203 if (spmi
->InterruptType
& 1) {
2204 /* We've got a GPE interrupt. */
2205 info
->irq
= spmi
->GPE
;
2206 info
->irq_setup
= acpi_gpe_irq_setup
;
2207 } else if (spmi
->InterruptType
& 2) {
2208 /* We've got an APIC/SAPIC interrupt. */
2209 info
->irq
= spmi
->GlobalSystemInterrupt
;
2210 info
->irq_setup
= std_irq_setup
;
2212 /* Use the default interrupt setting. */
2214 info
->irq_setup
= NULL
;
2217 if (spmi
->addr
.bit_width
) {
2218 /* A (hopefully) properly formed register bit width. */
2219 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2221 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2223 info
->io
.regsize
= info
->io
.regspacing
;
2224 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2226 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2227 info
->io_setup
= mem_setup
;
2228 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2229 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2230 info
->io_setup
= port_setup
;
2231 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2234 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2237 info
->io
.addr_data
= spmi
->addr
.address
;
2239 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2240 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2241 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2251 static void spmi_find_bmc(void)
2254 struct SPMITable
*spmi
;
2263 for (i
= 0; ; i
++) {
2264 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2265 (struct acpi_table_header
**)&spmi
);
2266 if (status
!= AE_OK
)
2269 try_init_spmi(spmi
);
2275 struct dmi_ipmi_data
{
2278 unsigned long base_addr
;
2284 static int decode_dmi(const struct dmi_header
*dm
,
2285 struct dmi_ipmi_data
*dmi
)
2287 const u8
*data
= (const u8
*)dm
;
2288 unsigned long base_addr
;
2290 u8 len
= dm
->length
;
2292 dmi
->type
= data
[4];
2294 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2296 if (base_addr
& 1) {
2298 base_addr
&= 0xFFFE;
2299 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2302 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2304 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2306 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2308 dmi
->irq
= data
[0x11];
2310 /* The top two bits of byte 0x10 hold the register spacing. */
2311 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2312 switch (reg_spacing
) {
2313 case 0x00: /* Byte boundaries */
2316 case 0x01: /* 32-bit boundaries */
2319 case 0x02: /* 16-byte boundaries */
2323 /* Some other interface, just ignore it. */
2329 * Note that technically, the lower bit of the base
2330 * address should be 1 if the address is I/O and 0 if
2331 * the address is in memory. So many systems get that
2332 * wrong (and all that I have seen are I/O) so we just
2333 * ignore that bit and assume I/O. Systems that use
2334 * memory should use the newer spec, anyway.
2336 dmi
->base_addr
= base_addr
& 0xfffe;
2337 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2341 dmi
->slave_addr
= data
[6];
2346 static void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2348 struct smi_info
*info
;
2350 info
= smi_info_alloc();
2352 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2356 info
->addr_source
= SI_SMBIOS
;
2357 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2359 switch (ipmi_data
->type
) {
2360 case 0x01: /* KCS */
2361 info
->si_type
= SI_KCS
;
2363 case 0x02: /* SMIC */
2364 info
->si_type
= SI_SMIC
;
2367 info
->si_type
= SI_BT
;
2374 switch (ipmi_data
->addr_space
) {
2375 case IPMI_MEM_ADDR_SPACE
:
2376 info
->io_setup
= mem_setup
;
2377 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2380 case IPMI_IO_ADDR_SPACE
:
2381 info
->io_setup
= port_setup
;
2382 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2387 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2388 ipmi_data
->addr_space
);
2391 info
->io
.addr_data
= ipmi_data
->base_addr
;
2393 info
->io
.regspacing
= ipmi_data
->offset
;
2394 if (!info
->io
.regspacing
)
2395 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2396 info
->io
.regsize
= DEFAULT_REGSPACING
;
2397 info
->io
.regshift
= 0;
2399 info
->slave_addr
= ipmi_data
->slave_addr
;
2401 info
->irq
= ipmi_data
->irq
;
2403 info
->irq_setup
= std_irq_setup
;
2405 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2406 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2407 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2414 static void dmi_find_bmc(void)
2416 const struct dmi_device
*dev
= NULL
;
2417 struct dmi_ipmi_data data
;
2420 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2421 memset(&data
, 0, sizeof(data
));
2422 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2425 try_init_dmi(&data
);
2428 #endif /* CONFIG_DMI */
2432 #define PCI_ERMC_CLASSCODE 0x0C0700
2433 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2434 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2435 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2436 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2437 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2439 #define PCI_HP_VENDOR_ID 0x103C
2440 #define PCI_MMC_DEVICE_ID 0x121A
2441 #define PCI_MMC_ADDR_CW 0x10
2443 static void ipmi_pci_cleanup(struct smi_info
*info
)
2445 struct pci_dev
*pdev
= info
->addr_source_data
;
2447 pci_disable_device(pdev
);
2450 static int ipmi_pci_probe_regspacing(struct smi_info
*info
)
2452 if (info
->si_type
== SI_KCS
) {
2453 unsigned char status
;
2456 info
->io
.regsize
= DEFAULT_REGSIZE
;
2457 info
->io
.regshift
= 0;
2459 info
->handlers
= &kcs_smi_handlers
;
2461 /* detect 1, 4, 16byte spacing */
2462 for (regspacing
= DEFAULT_REGSPACING
; regspacing
<= 16;) {
2463 info
->io
.regspacing
= regspacing
;
2464 if (info
->io_setup(info
)) {
2466 "Could not setup I/O space\n");
2467 return DEFAULT_REGSPACING
;
2469 /* write invalid cmd */
2470 info
->io
.outputb(&info
->io
, 1, 0x10);
2471 /* read status back */
2472 status
= info
->io
.inputb(&info
->io
, 1);
2473 info
->io_cleanup(info
);
2479 return DEFAULT_REGSPACING
;
2482 static int ipmi_pci_probe(struct pci_dev
*pdev
,
2483 const struct pci_device_id
*ent
)
2486 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2487 struct smi_info
*info
;
2489 info
= smi_info_alloc();
2493 info
->addr_source
= SI_PCI
;
2494 dev_info(&pdev
->dev
, "probing via PCI");
2496 switch (class_type
) {
2497 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2498 info
->si_type
= SI_SMIC
;
2501 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2502 info
->si_type
= SI_KCS
;
2505 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2506 info
->si_type
= SI_BT
;
2511 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2515 rv
= pci_enable_device(pdev
);
2517 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2522 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2523 info
->addr_source_data
= pdev
;
2525 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2526 info
->io_setup
= port_setup
;
2527 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2529 info
->io_setup
= mem_setup
;
2530 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2532 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2534 info
->io
.regspacing
= ipmi_pci_probe_regspacing(info
);
2535 info
->io
.regsize
= DEFAULT_REGSIZE
;
2536 info
->io
.regshift
= 0;
2538 info
->irq
= pdev
->irq
;
2540 info
->irq_setup
= std_irq_setup
;
2542 info
->dev
= &pdev
->dev
;
2543 pci_set_drvdata(pdev
, info
);
2545 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2546 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2552 pci_disable_device(pdev
);
2558 static void ipmi_pci_remove(struct pci_dev
*pdev
)
2560 struct smi_info
*info
= pci_get_drvdata(pdev
);
2561 cleanup_one_si(info
);
2564 static const struct pci_device_id ipmi_pci_devices
[] = {
2565 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2566 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2569 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2571 static struct pci_driver ipmi_pci_driver
= {
2572 .name
= DEVICE_NAME
,
2573 .id_table
= ipmi_pci_devices
,
2574 .probe
= ipmi_pci_probe
,
2575 .remove
= ipmi_pci_remove
,
2577 #endif /* CONFIG_PCI */
2580 static const struct of_device_id of_ipmi_match
[] = {
2581 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2582 .data
= (void *)(unsigned long) SI_KCS
},
2583 { .type
= "ipmi", .compatible
= "ipmi-smic",
2584 .data
= (void *)(unsigned long) SI_SMIC
},
2585 { .type
= "ipmi", .compatible
= "ipmi-bt",
2586 .data
= (void *)(unsigned long) SI_BT
},
2589 MODULE_DEVICE_TABLE(of
, of_ipmi_match
);
2591 static int of_ipmi_probe(struct platform_device
*dev
)
2593 const struct of_device_id
*match
;
2594 struct smi_info
*info
;
2595 struct resource resource
;
2596 const __be32
*regsize
, *regspacing
, *regshift
;
2597 struct device_node
*np
= dev
->dev
.of_node
;
2601 dev_info(&dev
->dev
, "probing via device tree\n");
2603 match
= of_match_device(of_ipmi_match
, &dev
->dev
);
2607 if (!of_device_is_available(np
))
2610 ret
= of_address_to_resource(np
, 0, &resource
);
2612 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2616 regsize
= of_get_property(np
, "reg-size", &proplen
);
2617 if (regsize
&& proplen
!= 4) {
2618 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2622 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2623 if (regspacing
&& proplen
!= 4) {
2624 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2628 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2629 if (regshift
&& proplen
!= 4) {
2630 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2634 info
= smi_info_alloc();
2638 "could not allocate memory for OF probe\n");
2642 info
->si_type
= (enum si_type
) match
->data
;
2643 info
->addr_source
= SI_DEVICETREE
;
2644 info
->irq_setup
= std_irq_setup
;
2646 if (resource
.flags
& IORESOURCE_IO
) {
2647 info
->io_setup
= port_setup
;
2648 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2650 info
->io_setup
= mem_setup
;
2651 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2654 info
->io
.addr_data
= resource
.start
;
2656 info
->io
.regsize
= regsize
? be32_to_cpup(regsize
) : DEFAULT_REGSIZE
;
2657 info
->io
.regspacing
= regspacing
? be32_to_cpup(regspacing
) : DEFAULT_REGSPACING
;
2658 info
->io
.regshift
= regshift
? be32_to_cpup(regshift
) : 0;
2660 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2661 info
->dev
= &dev
->dev
;
2663 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2664 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2667 dev_set_drvdata(&dev
->dev
, info
);
2669 ret
= add_smi(info
);
2677 #define of_ipmi_match NULL
2678 static int of_ipmi_probe(struct platform_device
*dev
)
2685 static int acpi_ipmi_probe(struct platform_device
*dev
)
2687 struct smi_info
*info
;
2688 struct resource
*res
, *res_second
;
2691 unsigned long long tmp
;
2694 handle
= ACPI_HANDLE(&dev
->dev
);
2698 info
= smi_info_alloc();
2702 info
->addr_source
= SI_ACPI
;
2703 dev_info(&dev
->dev
, PFX
"probing via ACPI\n");
2705 info
->addr_info
.acpi_info
.acpi_handle
= handle
;
2707 /* _IFT tells us the interface type: KCS, BT, etc */
2708 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2709 if (ACPI_FAILURE(status
)) {
2710 dev_err(&dev
->dev
, "Could not find ACPI IPMI interface type\n");
2716 info
->si_type
= SI_KCS
;
2719 info
->si_type
= SI_SMIC
;
2722 info
->si_type
= SI_BT
;
2724 case 4: /* SSIF, just ignore */
2728 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2732 res
= platform_get_resource(dev
, IORESOURCE_IO
, 0);
2734 info
->io_setup
= port_setup
;
2735 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2737 res
= platform_get_resource(dev
, IORESOURCE_MEM
, 0);
2739 info
->io_setup
= mem_setup
;
2740 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2744 dev_err(&dev
->dev
, "no I/O or memory address\n");
2747 info
->io
.addr_data
= res
->start
;
2749 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2750 res_second
= platform_get_resource(dev
,
2751 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2752 IORESOURCE_IO
: IORESOURCE_MEM
,
2755 if (res_second
->start
> info
->io
.addr_data
)
2756 info
->io
.regspacing
=
2757 res_second
->start
- info
->io
.addr_data
;
2759 info
->io
.regsize
= DEFAULT_REGSPACING
;
2760 info
->io
.regshift
= 0;
2762 /* If _GPE exists, use it; otherwise use standard interrupts */
2763 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2764 if (ACPI_SUCCESS(status
)) {
2766 info
->irq_setup
= acpi_gpe_irq_setup
;
2768 int irq
= platform_get_irq(dev
, 0);
2772 info
->irq_setup
= std_irq_setup
;
2776 info
->dev
= &dev
->dev
;
2777 platform_set_drvdata(dev
, info
);
2779 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2780 res
, info
->io
.regsize
, info
->io
.regspacing
,
2794 static const struct acpi_device_id acpi_ipmi_match
[] = {
2798 MODULE_DEVICE_TABLE(acpi
, acpi_ipmi_match
);
2800 static int acpi_ipmi_probe(struct platform_device
*dev
)
2806 static int ipmi_probe(struct platform_device
*dev
)
2808 if (of_ipmi_probe(dev
) == 0)
2811 return acpi_ipmi_probe(dev
);
2814 static int ipmi_remove(struct platform_device
*dev
)
2816 struct smi_info
*info
= dev_get_drvdata(&dev
->dev
);
2818 cleanup_one_si(info
);
2822 static struct platform_driver ipmi_driver
= {
2824 .name
= DEVICE_NAME
,
2825 .of_match_table
= of_ipmi_match
,
2826 .acpi_match_table
= ACPI_PTR(acpi_ipmi_match
),
2828 .probe
= ipmi_probe
,
2829 .remove
= ipmi_remove
,
2832 #ifdef CONFIG_PARISC
2833 static int ipmi_parisc_probe(struct parisc_device
*dev
)
2835 struct smi_info
*info
;
2838 info
= smi_info_alloc();
2842 "could not allocate memory for PARISC probe\n");
2846 info
->si_type
= SI_KCS
;
2847 info
->addr_source
= SI_DEVICETREE
;
2848 info
->io_setup
= mem_setup
;
2849 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2850 info
->io
.addr_data
= dev
->hpa
.start
;
2851 info
->io
.regsize
= 1;
2852 info
->io
.regspacing
= 1;
2853 info
->io
.regshift
= 0;
2854 info
->irq
= 0; /* no interrupt */
2855 info
->irq_setup
= NULL
;
2856 info
->dev
= &dev
->dev
;
2858 dev_dbg(&dev
->dev
, "addr 0x%lx\n", info
->io
.addr_data
);
2860 dev_set_drvdata(&dev
->dev
, info
);
2871 static int ipmi_parisc_remove(struct parisc_device
*dev
)
2873 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2877 static const struct parisc_device_id ipmi_parisc_tbl
[] = {
2878 { HPHW_MC
, HVERSION_REV_ANY_ID
, 0x004, 0xC0 },
2882 static struct parisc_driver ipmi_parisc_driver
= {
2884 .id_table
= ipmi_parisc_tbl
,
2885 .probe
= ipmi_parisc_probe
,
2886 .remove
= ipmi_parisc_remove
,
2888 #endif /* CONFIG_PARISC */
2890 static int wait_for_msg_done(struct smi_info
*smi_info
)
2892 enum si_sm_result smi_result
;
2894 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2896 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2897 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2898 schedule_timeout_uninterruptible(1);
2899 smi_result
= smi_info
->handlers
->event(
2900 smi_info
->si_sm
, jiffies_to_usecs(1));
2901 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2902 smi_result
= smi_info
->handlers
->event(
2903 smi_info
->si_sm
, 0);
2907 if (smi_result
== SI_SM_HOSED
)
2909 * We couldn't get the state machine to run, so whatever's at
2910 * the port is probably not an IPMI SMI interface.
2917 static int try_get_dev_id(struct smi_info
*smi_info
)
2919 unsigned char msg
[2];
2920 unsigned char *resp
;
2921 unsigned long resp_len
;
2924 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2929 * Do a Get Device ID command, since it comes back with some
2932 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2933 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2934 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2936 rv
= wait_for_msg_done(smi_info
);
2940 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2941 resp
, IPMI_MAX_MSG_LENGTH
);
2943 /* Check and record info from the get device id, in case we need it. */
2944 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2951 static int get_global_enables(struct smi_info
*smi_info
, u8
*enables
)
2953 unsigned char msg
[3];
2954 unsigned char *resp
;
2955 unsigned long resp_len
;
2958 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2962 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2963 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2964 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2966 rv
= wait_for_msg_done(smi_info
);
2968 dev_warn(smi_info
->dev
,
2969 "Error getting response from get global enables command: %d\n",
2974 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2975 resp
, IPMI_MAX_MSG_LENGTH
);
2978 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2979 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2981 dev_warn(smi_info
->dev
,
2982 "Invalid return from get global enables command: %ld %x %x %x\n",
2983 resp_len
, resp
[0], resp
[1], resp
[2]);
2996 * Returns 1 if it gets an error from the command.
2998 static int set_global_enables(struct smi_info
*smi_info
, u8 enables
)
3000 unsigned char msg
[3];
3001 unsigned char *resp
;
3002 unsigned long resp_len
;
3005 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
3009 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
3010 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
3012 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
3014 rv
= wait_for_msg_done(smi_info
);
3016 dev_warn(smi_info
->dev
,
3017 "Error getting response from set global enables command: %d\n",
3022 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
3023 resp
, IPMI_MAX_MSG_LENGTH
);
3026 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3027 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
3028 dev_warn(smi_info
->dev
,
3029 "Invalid return from set global enables command: %ld %x %x\n",
3030 resp_len
, resp
[0], resp
[1]);
3044 * Some BMCs do not support clearing the receive irq bit in the global
3045 * enables (even if they don't support interrupts on the BMC). Check
3046 * for this and handle it properly.
3048 static void check_clr_rcv_irq(struct smi_info
*smi_info
)
3053 rv
= get_global_enables(smi_info
, &enables
);
3055 if ((enables
& IPMI_BMC_RCV_MSG_INTR
) == 0)
3056 /* Already clear, should work ok. */
3059 enables
&= ~IPMI_BMC_RCV_MSG_INTR
;
3060 rv
= set_global_enables(smi_info
, enables
);
3064 dev_err(smi_info
->dev
,
3065 "Cannot check clearing the rcv irq: %d\n", rv
);
3071 * An error when setting the event buffer bit means
3072 * clearing the bit is not supported.
3074 dev_warn(smi_info
->dev
,
3075 "The BMC does not support clearing the recv irq bit, compensating, but the BMC needs to be fixed.\n");
3076 smi_info
->cannot_disable_irq
= true;
3081 * Some BMCs do not support setting the interrupt bits in the global
3082 * enables even if they support interrupts. Clearly bad, but we can
3085 static void check_set_rcv_irq(struct smi_info
*smi_info
)
3093 rv
= get_global_enables(smi_info
, &enables
);
3095 enables
|= IPMI_BMC_RCV_MSG_INTR
;
3096 rv
= set_global_enables(smi_info
, enables
);
3100 dev_err(smi_info
->dev
,
3101 "Cannot check setting the rcv irq: %d\n", rv
);
3107 * An error when setting the event buffer bit means
3108 * setting the bit is not supported.
3110 dev_warn(smi_info
->dev
,
3111 "The BMC does not support setting the recv irq bit, compensating, but the BMC needs to be fixed.\n");
3112 smi_info
->cannot_disable_irq
= true;
3113 smi_info
->irq_enable_broken
= true;
3117 static int try_enable_event_buffer(struct smi_info
*smi_info
)
3119 unsigned char msg
[3];
3120 unsigned char *resp
;
3121 unsigned long resp_len
;
3124 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
3128 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
3129 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
3130 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
3132 rv
= wait_for_msg_done(smi_info
);
3134 printk(KERN_WARNING PFX
"Error getting response from get"
3135 " global enables command, the event buffer is not"
3140 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
3141 resp
, IPMI_MAX_MSG_LENGTH
);
3144 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3145 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
3147 printk(KERN_WARNING PFX
"Invalid return from get global"
3148 " enables command, cannot enable the event buffer.\n");
3153 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
) {
3154 /* buffer is already enabled, nothing to do. */
3155 smi_info
->supports_event_msg_buff
= true;
3159 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
3160 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
3161 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
3162 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
3164 rv
= wait_for_msg_done(smi_info
);
3166 printk(KERN_WARNING PFX
"Error getting response from set"
3167 " global, enables command, the event buffer is not"
3172 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
3173 resp
, IPMI_MAX_MSG_LENGTH
);
3176 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
3177 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
3178 printk(KERN_WARNING PFX
"Invalid return from get global,"
3179 "enables command, not enable the event buffer.\n");
3186 * An error when setting the event buffer bit means
3187 * that the event buffer is not supported.
3191 smi_info
->supports_event_msg_buff
= true;
3198 static int smi_type_proc_show(struct seq_file
*m
, void *v
)
3200 struct smi_info
*smi
= m
->private;
3202 seq_printf(m
, "%s\n", si_to_str
[smi
->si_type
]);
3207 static int smi_type_proc_open(struct inode
*inode
, struct file
*file
)
3209 return single_open(file
, smi_type_proc_show
, PDE_DATA(inode
));
3212 static const struct file_operations smi_type_proc_ops
= {
3213 .open
= smi_type_proc_open
,
3215 .llseek
= seq_lseek
,
3216 .release
= single_release
,
3219 static int smi_si_stats_proc_show(struct seq_file
*m
, void *v
)
3221 struct smi_info
*smi
= m
->private;
3223 seq_printf(m
, "interrupts_enabled: %d\n",
3224 smi
->irq
&& !smi
->interrupt_disabled
);
3225 seq_printf(m
, "short_timeouts: %u\n",
3226 smi_get_stat(smi
, short_timeouts
));
3227 seq_printf(m
, "long_timeouts: %u\n",
3228 smi_get_stat(smi
, long_timeouts
));
3229 seq_printf(m
, "idles: %u\n",
3230 smi_get_stat(smi
, idles
));
3231 seq_printf(m
, "interrupts: %u\n",
3232 smi_get_stat(smi
, interrupts
));
3233 seq_printf(m
, "attentions: %u\n",
3234 smi_get_stat(smi
, attentions
));
3235 seq_printf(m
, "flag_fetches: %u\n",
3236 smi_get_stat(smi
, flag_fetches
));
3237 seq_printf(m
, "hosed_count: %u\n",
3238 smi_get_stat(smi
, hosed_count
));
3239 seq_printf(m
, "complete_transactions: %u\n",
3240 smi_get_stat(smi
, complete_transactions
));
3241 seq_printf(m
, "events: %u\n",
3242 smi_get_stat(smi
, events
));
3243 seq_printf(m
, "watchdog_pretimeouts: %u\n",
3244 smi_get_stat(smi
, watchdog_pretimeouts
));
3245 seq_printf(m
, "incoming_messages: %u\n",
3246 smi_get_stat(smi
, incoming_messages
));
3250 static int smi_si_stats_proc_open(struct inode
*inode
, struct file
*file
)
3252 return single_open(file
, smi_si_stats_proc_show
, PDE_DATA(inode
));
3255 static const struct file_operations smi_si_stats_proc_ops
= {
3256 .open
= smi_si_stats_proc_open
,
3258 .llseek
= seq_lseek
,
3259 .release
= single_release
,
3262 static int smi_params_proc_show(struct seq_file
*m
, void *v
)
3264 struct smi_info
*smi
= m
->private;
3267 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
3268 si_to_str
[smi
->si_type
],
3269 addr_space_to_str
[smi
->io
.addr_type
],
3280 static int smi_params_proc_open(struct inode
*inode
, struct file
*file
)
3282 return single_open(file
, smi_params_proc_show
, PDE_DATA(inode
));
3285 static const struct file_operations smi_params_proc_ops
= {
3286 .open
= smi_params_proc_open
,
3288 .llseek
= seq_lseek
,
3289 .release
= single_release
,
3293 * oem_data_avail_to_receive_msg_avail
3294 * @info - smi_info structure with msg_flags set
3296 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
3297 * Returns 1 indicating need to re-run handle_flags().
3299 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
3301 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
3307 * setup_dell_poweredge_oem_data_handler
3308 * @info - smi_info.device_id must be populated
3310 * Systems that match, but have firmware version < 1.40 may assert
3311 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3312 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3313 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3314 * as RECEIVE_MSG_AVAIL instead.
3316 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3317 * assert the OEM[012] bits, and if it did, the driver would have to
3318 * change to handle that properly, we don't actually check for the
3320 * Device ID = 0x20 BMC on PowerEdge 8G servers
3321 * Device Revision = 0x80
3322 * Firmware Revision1 = 0x01 BMC version 1.40
3323 * Firmware Revision2 = 0x40 BCD encoded
3324 * IPMI Version = 0x51 IPMI 1.5
3325 * Manufacturer ID = A2 02 00 Dell IANA
3327 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3328 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3331 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3332 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3333 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
3334 #define DELL_IANA_MFR_ID 0x0002a2
3335 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
3337 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3338 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
3339 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
3340 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
3341 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
3342 smi_info
->oem_data_avail_handler
=
3343 oem_data_avail_to_receive_msg_avail
;
3344 } else if (ipmi_version_major(id
) < 1 ||
3345 (ipmi_version_major(id
) == 1 &&
3346 ipmi_version_minor(id
) < 5)) {
3347 smi_info
->oem_data_avail_handler
=
3348 oem_data_avail_to_receive_msg_avail
;
3353 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3354 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
3356 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
3358 /* Make it a response */
3359 msg
->rsp
[0] = msg
->data
[0] | 4;
3360 msg
->rsp
[1] = msg
->data
[1];
3361 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
3363 smi_info
->curr_msg
= NULL
;
3364 deliver_recv_msg(smi_info
, msg
);
3368 * dell_poweredge_bt_xaction_handler
3369 * @info - smi_info.device_id must be populated
3371 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3372 * not respond to a Get SDR command if the length of the data
3373 * requested is exactly 0x3A, which leads to command timeouts and no
3374 * data returned. This intercepts such commands, and causes userspace
3375 * callers to try again with a different-sized buffer, which succeeds.
3378 #define STORAGE_NETFN 0x0A
3379 #define STORAGE_CMD_GET_SDR 0x23
3380 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
3381 unsigned long unused
,
3384 struct smi_info
*smi_info
= in
;
3385 unsigned char *data
= smi_info
->curr_msg
->data
;
3386 unsigned int size
= smi_info
->curr_msg
->data_size
;
3388 (data
[0]>>2) == STORAGE_NETFN
&&
3389 data
[1] == STORAGE_CMD_GET_SDR
&&
3391 return_hosed_msg_badsize(smi_info
);
3397 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
3398 .notifier_call
= dell_poweredge_bt_xaction_handler
,
3402 * setup_dell_poweredge_bt_xaction_handler
3403 * @info - smi_info.device_id must be filled in already
3405 * Fills in smi_info.device_id.start_transaction_pre_hook
3406 * when we know what function to use there.
3409 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
3411 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3412 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
3413 smi_info
->si_type
== SI_BT
)
3414 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
3418 * setup_oem_data_handler
3419 * @info - smi_info.device_id must be filled in already
3421 * Fills in smi_info.device_id.oem_data_available_handler
3422 * when we know what function to use there.
3425 static void setup_oem_data_handler(struct smi_info
*smi_info
)
3427 setup_dell_poweredge_oem_data_handler(smi_info
);
3430 static void setup_xaction_handlers(struct smi_info
*smi_info
)
3432 setup_dell_poweredge_bt_xaction_handler(smi_info
);
3435 static void check_for_broken_irqs(struct smi_info
*smi_info
)
3437 check_clr_rcv_irq(smi_info
);
3438 check_set_rcv_irq(smi_info
);
3441 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
3443 if (smi_info
->thread
!= NULL
)
3444 kthread_stop(smi_info
->thread
);
3445 if (smi_info
->timer_running
)
3446 del_timer_sync(&smi_info
->si_timer
);
3449 static const struct ipmi_default_vals
3455 { .type
= SI_KCS
, .port
= 0xca2 },
3456 { .type
= SI_SMIC
, .port
= 0xca9 },
3457 { .type
= SI_BT
, .port
= 0xe4 },
3461 static void default_find_bmc(void)
3463 struct smi_info
*info
;
3466 for (i
= 0; ; i
++) {
3467 if (!ipmi_defaults
[i
].port
)
3470 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3473 info
= smi_info_alloc();
3477 info
->addr_source
= SI_DEFAULT
;
3479 info
->si_type
= ipmi_defaults
[i
].type
;
3480 info
->io_setup
= port_setup
;
3481 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3482 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3484 info
->io
.addr
= NULL
;
3485 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3486 info
->io
.regsize
= DEFAULT_REGSPACING
;
3487 info
->io
.regshift
= 0;
3489 if (add_smi(info
) == 0) {
3490 if ((try_smi_init(info
)) == 0) {
3492 printk(KERN_INFO PFX
"Found default %s"
3493 " state machine at %s address 0x%lx\n",
3494 si_to_str
[info
->si_type
],
3495 addr_space_to_str
[info
->io
.addr_type
],
3496 info
->io
.addr_data
);
3498 cleanup_one_si(info
);
3505 static int is_new_interface(struct smi_info
*info
)
3509 list_for_each_entry(e
, &smi_infos
, link
) {
3510 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3512 if (e
->io
.addr_data
== info
->io
.addr_data
)
3519 static int add_smi(struct smi_info
*new_smi
)
3523 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3524 ipmi_addr_src_to_str(new_smi
->addr_source
),
3525 si_to_str
[new_smi
->si_type
]);
3526 mutex_lock(&smi_infos_lock
);
3527 if (!is_new_interface(new_smi
)) {
3528 printk(KERN_CONT
" duplicate interface\n");
3533 printk(KERN_CONT
"\n");
3535 /* So we know not to free it unless we have allocated one. */
3536 new_smi
->intf
= NULL
;
3537 new_smi
->si_sm
= NULL
;
3538 new_smi
->handlers
= NULL
;
3540 list_add_tail(&new_smi
->link
, &smi_infos
);
3543 mutex_unlock(&smi_infos_lock
);
3547 static int try_smi_init(struct smi_info
*new_smi
)
3552 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3553 " machine at %s address 0x%lx, slave address 0x%x,"
3555 ipmi_addr_src_to_str(new_smi
->addr_source
),
3556 si_to_str
[new_smi
->si_type
],
3557 addr_space_to_str
[new_smi
->io
.addr_type
],
3558 new_smi
->io
.addr_data
,
3559 new_smi
->slave_addr
, new_smi
->irq
);
3561 switch (new_smi
->si_type
) {
3563 new_smi
->handlers
= &kcs_smi_handlers
;
3567 new_smi
->handlers
= &smic_smi_handlers
;
3571 new_smi
->handlers
= &bt_smi_handlers
;
3575 /* No support for anything else yet. */
3580 /* Allocate the state machine's data and initialize it. */
3581 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3582 if (!new_smi
->si_sm
) {
3584 "Could not allocate state machine memory\n");
3588 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3591 /* Now that we know the I/O size, we can set up the I/O. */
3592 rv
= new_smi
->io_setup(new_smi
);
3594 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3598 /* Do low-level detection first. */
3599 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3600 if (new_smi
->addr_source
)
3601 printk(KERN_INFO PFX
"Interface detection failed\n");
3607 * Attempt a get device id command. If it fails, we probably
3608 * don't have a BMC here.
3610 rv
= try_get_dev_id(new_smi
);
3612 if (new_smi
->addr_source
)
3613 printk(KERN_INFO PFX
"There appears to be no BMC"
3614 " at this location\n");
3618 setup_oem_data_handler(new_smi
);
3619 setup_xaction_handlers(new_smi
);
3620 check_for_broken_irqs(new_smi
);
3622 new_smi
->waiting_msg
= NULL
;
3623 new_smi
->curr_msg
= NULL
;
3624 atomic_set(&new_smi
->req_events
, 0);
3625 new_smi
->run_to_completion
= false;
3626 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3627 atomic_set(&new_smi
->stats
[i
], 0);
3629 new_smi
->interrupt_disabled
= true;
3630 atomic_set(&new_smi
->need_watch
, 0);
3631 new_smi
->intf_num
= smi_num
;
3634 rv
= try_enable_event_buffer(new_smi
);
3636 new_smi
->has_event_buffer
= true;
3639 * Start clearing the flags before we enable interrupts or the
3640 * timer to avoid racing with the timer.
3642 start_clear_flags(new_smi
, false);
3645 * IRQ is defined to be set when non-zero. req_events will
3646 * cause a global flags check that will enable interrupts.
3649 new_smi
->interrupt_disabled
= false;
3650 atomic_set(&new_smi
->req_events
, 1);
3653 if (!new_smi
->dev
) {
3655 * If we don't already have a device from something
3656 * else (like PCI), then register a new one.
3658 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3660 if (!new_smi
->pdev
) {
3662 "Unable to allocate platform device\n");
3665 new_smi
->dev
= &new_smi
->pdev
->dev
;
3666 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3668 rv
= platform_device_add(new_smi
->pdev
);
3671 "Unable to register system interface device:"
3676 new_smi
->dev_registered
= true;
3679 rv
= ipmi_register_smi(&handlers
,
3681 &new_smi
->device_id
,
3683 new_smi
->slave_addr
);
3685 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3687 goto out_err_stop_timer
;
3690 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3694 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3695 goto out_err_stop_timer
;
3698 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3699 &smi_si_stats_proc_ops
,
3702 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3703 goto out_err_stop_timer
;
3706 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3707 &smi_params_proc_ops
,
3710 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3711 goto out_err_stop_timer
;
3714 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3715 si_to_str
[new_smi
->si_type
]);
3720 wait_for_timer_and_thread(new_smi
);
3723 new_smi
->interrupt_disabled
= true;
3725 if (new_smi
->intf
) {
3726 ipmi_smi_t intf
= new_smi
->intf
;
3727 new_smi
->intf
= NULL
;
3728 ipmi_unregister_smi(intf
);
3731 if (new_smi
->irq_cleanup
) {
3732 new_smi
->irq_cleanup(new_smi
);
3733 new_smi
->irq_cleanup
= NULL
;
3737 * Wait until we know that we are out of any interrupt
3738 * handlers might have been running before we freed the
3741 synchronize_sched();
3743 if (new_smi
->si_sm
) {
3744 if (new_smi
->handlers
)
3745 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3746 kfree(new_smi
->si_sm
);
3747 new_smi
->si_sm
= NULL
;
3749 if (new_smi
->addr_source_cleanup
) {
3750 new_smi
->addr_source_cleanup(new_smi
);
3751 new_smi
->addr_source_cleanup
= NULL
;
3753 if (new_smi
->io_cleanup
) {
3754 new_smi
->io_cleanup(new_smi
);
3755 new_smi
->io_cleanup
= NULL
;
3758 if (new_smi
->dev_registered
) {
3759 platform_device_unregister(new_smi
->pdev
);
3760 new_smi
->dev_registered
= false;
3766 static int init_ipmi_si(void)
3772 enum ipmi_addr_src type
= SI_INVALID
;
3778 if (si_tryplatform
) {
3779 rv
= platform_driver_register(&ipmi_driver
);
3781 printk(KERN_ERR PFX
"Unable to register "
3782 "driver: %d\n", rv
);
3787 /* Parse out the si_type string into its components. */
3790 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3792 str
= strchr(str
, ',');
3802 printk(KERN_INFO
"IPMI System Interface driver.\n");
3804 /* If the user gave us a device, they presumably want us to use it */
3805 if (!hardcode_find_bmc())
3810 rv
= pci_register_driver(&ipmi_pci_driver
);
3812 printk(KERN_ERR PFX
"Unable to register "
3813 "PCI driver: %d\n", rv
);
3815 pci_registered
= true;
3829 #ifdef CONFIG_PARISC
3830 register_parisc_driver(&ipmi_parisc_driver
);
3831 parisc_registered
= true;
3832 /* poking PC IO addresses will crash machine, don't do it */
3836 /* We prefer devices with interrupts, but in the case of a machine
3837 with multiple BMCs we assume that there will be several instances
3838 of a given type so if we succeed in registering a type then also
3839 try to register everything else of the same type */
3841 mutex_lock(&smi_infos_lock
);
3842 list_for_each_entry(e
, &smi_infos
, link
) {
3843 /* Try to register a device if it has an IRQ and we either
3844 haven't successfully registered a device yet or this
3845 device has the same type as one we successfully registered */
3846 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3847 if (!try_smi_init(e
)) {
3848 type
= e
->addr_source
;
3853 /* type will only have been set if we successfully registered an si */
3855 mutex_unlock(&smi_infos_lock
);
3859 /* Fall back to the preferred device */
3861 list_for_each_entry(e
, &smi_infos
, link
) {
3862 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3863 if (!try_smi_init(e
)) {
3864 type
= e
->addr_source
;
3868 mutex_unlock(&smi_infos_lock
);
3873 if (si_trydefaults
) {
3874 mutex_lock(&smi_infos_lock
);
3875 if (list_empty(&smi_infos
)) {
3876 /* No BMC was found, try defaults. */
3877 mutex_unlock(&smi_infos_lock
);
3880 mutex_unlock(&smi_infos_lock
);
3883 mutex_lock(&smi_infos_lock
);
3884 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3885 mutex_unlock(&smi_infos_lock
);
3887 printk(KERN_WARNING PFX
3888 "Unable to find any System Interface(s)\n");
3891 mutex_unlock(&smi_infos_lock
);
3895 module_init(init_ipmi_si
);
3897 static void cleanup_one_si(struct smi_info
*to_clean
)
3904 if (to_clean
->intf
) {
3905 ipmi_smi_t intf
= to_clean
->intf
;
3907 to_clean
->intf
= NULL
;
3908 rv
= ipmi_unregister_smi(intf
);
3910 pr_err(PFX
"Unable to unregister device: errno=%d\n",
3916 dev_set_drvdata(to_clean
->dev
, NULL
);
3918 list_del(&to_clean
->link
);
3921 * Make sure that interrupts, the timer and the thread are
3922 * stopped and will not run again.
3924 if (to_clean
->irq_cleanup
)
3925 to_clean
->irq_cleanup(to_clean
);
3926 wait_for_timer_and_thread(to_clean
);
3929 * Timeouts are stopped, now make sure the interrupts are off
3930 * in the BMC. Note that timers and CPU interrupts are off,
3931 * so no need for locks.
3933 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3935 schedule_timeout_uninterruptible(1);
3937 disable_si_irq(to_clean
, false);
3938 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3940 schedule_timeout_uninterruptible(1);
3943 if (to_clean
->handlers
)
3944 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3946 kfree(to_clean
->si_sm
);
3948 if (to_clean
->addr_source_cleanup
)
3949 to_clean
->addr_source_cleanup(to_clean
);
3950 if (to_clean
->io_cleanup
)
3951 to_clean
->io_cleanup(to_clean
);
3953 if (to_clean
->dev_registered
)
3954 platform_device_unregister(to_clean
->pdev
);
3959 static void cleanup_ipmi_si(void)
3961 struct smi_info
*e
, *tmp_e
;
3968 pci_unregister_driver(&ipmi_pci_driver
);
3970 #ifdef CONFIG_PARISC
3971 if (parisc_registered
)
3972 unregister_parisc_driver(&ipmi_parisc_driver
);
3975 platform_driver_unregister(&ipmi_driver
);
3977 mutex_lock(&smi_infos_lock
);
3978 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3980 mutex_unlock(&smi_infos_lock
);
3982 module_exit(cleanup_ipmi_si
);
3984 MODULE_LICENSE("GPL");
3985 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3986 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3987 " system interfaces.");