4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <asm/system.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/errno.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/list.h>
52 #include <linux/pci.h>
53 #include <linux/ioport.h>
54 #include <linux/notifier.h>
55 #include <linux/mutex.h>
56 #include <linux/kthread.h>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi_smi.h>
62 #include "ipmi_si_sm.h"
63 #include <linux/init.h>
64 #include <linux/dmi.h>
65 #include <linux/string.h>
66 #include <linux/ctype.h>
67 #include <linux/pnp.h>
70 #include <linux/of_device.h>
71 #include <linux/of_platform.h>
74 #define PFX "ipmi_si: "
76 /* Measure times between events in the driver. */
79 /* Call every 10 ms. */
80 #define SI_TIMEOUT_TIME_USEC 10000
81 #define SI_USEC_PER_JIFFY (1000000/HZ)
82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
91 SI_CLEARING_FLAGS_THEN_SET_IRQ
,
93 SI_ENABLE_INTERRUPTS1
,
94 SI_ENABLE_INTERRUPTS2
,
95 SI_DISABLE_INTERRUPTS1
,
96 SI_DISABLE_INTERRUPTS2
97 /* FIXME - add watchdog stuff. */
100 /* Some BT-specific defines we need here. */
101 #define IPMI_BT_INTMASK_REG 2
102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106 SI_KCS
, SI_SMIC
, SI_BT
108 static char *si_to_str
[] = { "kcs", "smic", "bt" };
111 SI_INVALID
= 0, SI_HOTMOD
, SI_HARDCODED
, SI_SPMI
, SI_ACPI
, SI_SMBIOS
,
112 SI_PCI
, SI_DEVICETREE
, SI_DEFAULT
114 static char *ipmi_addr_src_to_str
[] = { NULL
, "hotmod", "hardcoded", "SPMI",
115 "ACPI", "SMBIOS", "PCI",
116 "device-tree", "default" };
118 #define DEVICE_NAME "ipmi_si"
120 static struct platform_driver ipmi_driver
= {
123 .bus
= &platform_bus_type
129 * Indexes into stats[] in smi_info below.
131 enum si_stat_indexes
{
133 * Number of times the driver requested a timer while an operation
136 SI_STAT_short_timeouts
= 0,
139 * Number of times the driver requested a timer while nothing was in
142 SI_STAT_long_timeouts
,
144 /* Number of times the interface was idle while being polled. */
147 /* Number of interrupts the driver handled. */
150 /* Number of time the driver got an ATTN from the hardware. */
153 /* Number of times the driver requested flags from the hardware. */
154 SI_STAT_flag_fetches
,
156 /* Number of times the hardware didn't follow the state machine. */
159 /* Number of completed messages. */
160 SI_STAT_complete_transactions
,
162 /* Number of IPMI events received from the hardware. */
165 /* Number of watchdog pretimeouts. */
166 SI_STAT_watchdog_pretimeouts
,
168 /* Number of asyncronous messages received. */
169 SI_STAT_incoming_messages
,
172 /* This *must* remain last, add new values above this. */
179 struct si_sm_data
*si_sm
;
180 struct si_sm_handlers
*handlers
;
181 enum si_type si_type
;
184 struct list_head xmit_msgs
;
185 struct list_head hp_xmit_msgs
;
186 struct ipmi_smi_msg
*curr_msg
;
187 enum si_intf_state si_state
;
190 * Used to handle the various types of I/O that can occur with
194 int (*io_setup
)(struct smi_info
*info
);
195 void (*io_cleanup
)(struct smi_info
*info
);
196 int (*irq_setup
)(struct smi_info
*info
);
197 void (*irq_cleanup
)(struct smi_info
*info
);
198 unsigned int io_size
;
199 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
200 void (*addr_source_cleanup
)(struct smi_info
*info
);
201 void *addr_source_data
;
204 * Per-OEM handler, called from handle_flags(). Returns 1
205 * when handle_flags() needs to be re-run or 0 indicating it
206 * set si_state itself.
208 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
211 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
212 * is set to hold the flags until we are done handling everything
215 #define RECEIVE_MSG_AVAIL 0x01
216 #define EVENT_MSG_BUFFER_FULL 0x02
217 #define WDT_PRE_TIMEOUT_INT 0x08
218 #define OEM0_DATA_AVAIL 0x20
219 #define OEM1_DATA_AVAIL 0x40
220 #define OEM2_DATA_AVAIL 0x80
221 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
224 unsigned char msg_flags
;
226 /* Does the BMC have an event buffer? */
227 char has_event_buffer
;
230 * If set to true, this will request events the next time the
231 * state machine is idle.
236 * If true, run the state machine to completion on every send
237 * call. Generally used after a panic to make sure stuff goes
240 int run_to_completion
;
242 /* The I/O port of an SI interface. */
246 * The space between start addresses of the two ports. For
247 * instance, if the first port is 0xca2 and the spacing is 4, then
248 * the second port is 0xca6.
250 unsigned int spacing
;
252 /* zero if no irq; */
255 /* The timer for this si. */
256 struct timer_list si_timer
;
258 /* The time (in jiffies) the last timeout occurred at. */
259 unsigned long last_timeout_jiffies
;
261 /* Used to gracefully stop the timer without race conditions. */
262 atomic_t stop_operation
;
265 * The driver will disable interrupts when it gets into a
266 * situation where it cannot handle messages due to lack of
267 * memory. Once that situation clears up, it will re-enable
270 int interrupt_disabled
;
272 /* From the get device id response... */
273 struct ipmi_device_id device_id
;
275 /* Driver model stuff. */
277 struct platform_device
*pdev
;
280 * True if we allocated the device, false if it came from
281 * someplace else (like PCI).
285 /* Slave address, could be reported from DMI. */
286 unsigned char slave_addr
;
288 /* Counters and things for the proc filesystem. */
289 atomic_t stats
[SI_NUM_STATS
];
291 struct task_struct
*thread
;
293 struct list_head link
;
296 #define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298 #define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
301 #define SI_MAX_PARMS 4
303 static int force_kipmid
[SI_MAX_PARMS
];
304 static int num_force_kipmid
;
306 static int pci_registered
;
309 static int pnp_registered
;
312 static int of_registered
;
315 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
316 static int num_max_busy_us
;
318 static int unload_when_empty
= 1;
320 static int add_smi(struct smi_info
*smi
);
321 static int try_smi_init(struct smi_info
*smi
);
322 static void cleanup_one_si(struct smi_info
*to_clean
);
324 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
325 static int register_xaction_notifier(struct notifier_block
*nb
)
327 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
330 static void deliver_recv_msg(struct smi_info
*smi_info
,
331 struct ipmi_smi_msg
*msg
)
333 /* Deliver the message to the upper layer with the lock
336 if (smi_info
->run_to_completion
) {
337 ipmi_smi_msg_received(smi_info
->intf
, msg
);
339 spin_unlock(&(smi_info
->si_lock
));
340 ipmi_smi_msg_received(smi_info
->intf
, msg
);
341 spin_lock(&(smi_info
->si_lock
));
345 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
347 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
349 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
350 cCode
= IPMI_ERR_UNSPECIFIED
;
351 /* else use it as is */
353 /* Make it a reponse */
354 msg
->rsp
[0] = msg
->data
[0] | 4;
355 msg
->rsp
[1] = msg
->data
[1];
359 smi_info
->curr_msg
= NULL
;
360 deliver_recv_msg(smi_info
, msg
);
363 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
366 struct list_head
*entry
= NULL
;
372 * No need to save flags, we aleady have interrupts off and we
373 * already hold the SMI lock.
375 if (!smi_info
->run_to_completion
)
376 spin_lock(&(smi_info
->msg_lock
));
378 /* Pick the high priority queue first. */
379 if (!list_empty(&(smi_info
->hp_xmit_msgs
))) {
380 entry
= smi_info
->hp_xmit_msgs
.next
;
381 } else if (!list_empty(&(smi_info
->xmit_msgs
))) {
382 entry
= smi_info
->xmit_msgs
.next
;
386 smi_info
->curr_msg
= NULL
;
392 smi_info
->curr_msg
= list_entry(entry
,
397 printk(KERN_DEBUG
"**Start2: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
399 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
401 if (err
& NOTIFY_STOP_MASK
) {
402 rv
= SI_SM_CALL_WITHOUT_DELAY
;
405 err
= smi_info
->handlers
->start_transaction(
407 smi_info
->curr_msg
->data
,
408 smi_info
->curr_msg
->data_size
);
410 return_hosed_msg(smi_info
, err
);
412 rv
= SI_SM_CALL_WITHOUT_DELAY
;
415 if (!smi_info
->run_to_completion
)
416 spin_unlock(&(smi_info
->msg_lock
));
421 static void start_enable_irq(struct smi_info
*smi_info
)
423 unsigned char msg
[2];
426 * If we are enabling interrupts, we have to tell the
429 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
430 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
432 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
433 smi_info
->si_state
= SI_ENABLE_INTERRUPTS1
;
436 static void start_disable_irq(struct smi_info
*smi_info
)
438 unsigned char msg
[2];
440 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
441 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
443 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
444 smi_info
->si_state
= SI_DISABLE_INTERRUPTS1
;
447 static void start_clear_flags(struct smi_info
*smi_info
)
449 unsigned char msg
[3];
451 /* Make sure the watchdog pre-timeout flag is not set at startup. */
452 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
453 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
454 msg
[2] = WDT_PRE_TIMEOUT_INT
;
456 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
457 smi_info
->si_state
= SI_CLEARING_FLAGS
;
461 * When we have a situtaion where we run out of memory and cannot
462 * allocate messages, we just leave them in the BMC and run the system
463 * polled until we can allocate some memory. Once we have some
464 * memory, we will re-enable the interrupt.
466 static inline void disable_si_irq(struct smi_info
*smi_info
)
468 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
469 start_disable_irq(smi_info
);
470 smi_info
->interrupt_disabled
= 1;
471 if (!atomic_read(&smi_info
->stop_operation
))
472 mod_timer(&smi_info
->si_timer
,
473 jiffies
+ SI_TIMEOUT_JIFFIES
);
477 static inline void enable_si_irq(struct smi_info
*smi_info
)
479 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
480 start_enable_irq(smi_info
);
481 smi_info
->interrupt_disabled
= 0;
485 static void handle_flags(struct smi_info
*smi_info
)
488 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
489 /* Watchdog pre-timeout */
490 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
492 start_clear_flags(smi_info
);
493 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
494 spin_unlock(&(smi_info
->si_lock
));
495 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
496 spin_lock(&(smi_info
->si_lock
));
497 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
498 /* Messages available. */
499 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
500 if (!smi_info
->curr_msg
) {
501 disable_si_irq(smi_info
);
502 smi_info
->si_state
= SI_NORMAL
;
505 enable_si_irq(smi_info
);
507 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
508 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
509 smi_info
->curr_msg
->data_size
= 2;
511 smi_info
->handlers
->start_transaction(
513 smi_info
->curr_msg
->data
,
514 smi_info
->curr_msg
->data_size
);
515 smi_info
->si_state
= SI_GETTING_MESSAGES
;
516 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
517 /* Events available. */
518 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
519 if (!smi_info
->curr_msg
) {
520 disable_si_irq(smi_info
);
521 smi_info
->si_state
= SI_NORMAL
;
524 enable_si_irq(smi_info
);
526 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
527 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
528 smi_info
->curr_msg
->data_size
= 2;
530 smi_info
->handlers
->start_transaction(
532 smi_info
->curr_msg
->data
,
533 smi_info
->curr_msg
->data_size
);
534 smi_info
->si_state
= SI_GETTING_EVENTS
;
535 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
536 smi_info
->oem_data_avail_handler
) {
537 if (smi_info
->oem_data_avail_handler(smi_info
))
540 smi_info
->si_state
= SI_NORMAL
;
543 static void handle_transaction_done(struct smi_info
*smi_info
)
545 struct ipmi_smi_msg
*msg
;
550 printk(KERN_DEBUG
"**Done: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
552 switch (smi_info
->si_state
) {
554 if (!smi_info
->curr_msg
)
557 smi_info
->curr_msg
->rsp_size
558 = smi_info
->handlers
->get_result(
560 smi_info
->curr_msg
->rsp
,
561 IPMI_MAX_MSG_LENGTH
);
564 * Do this here becase deliver_recv_msg() releases the
565 * lock, and a new message can be put in during the
566 * time the lock is released.
568 msg
= smi_info
->curr_msg
;
569 smi_info
->curr_msg
= NULL
;
570 deliver_recv_msg(smi_info
, msg
);
573 case SI_GETTING_FLAGS
:
575 unsigned char msg
[4];
578 /* We got the flags from the SMI, now handle them. */
579 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
581 /* Error fetching flags, just give up for now. */
582 smi_info
->si_state
= SI_NORMAL
;
583 } else if (len
< 4) {
585 * Hmm, no flags. That's technically illegal, but
586 * don't use uninitialized data.
588 smi_info
->si_state
= SI_NORMAL
;
590 smi_info
->msg_flags
= msg
[3];
591 handle_flags(smi_info
);
596 case SI_CLEARING_FLAGS
:
597 case SI_CLEARING_FLAGS_THEN_SET_IRQ
:
599 unsigned char msg
[3];
601 /* We cleared the flags. */
602 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
604 /* Error clearing flags */
605 dev_warn(smi_info
->dev
,
606 "Error clearing flags: %2.2x\n", msg
[2]);
608 if (smi_info
->si_state
== SI_CLEARING_FLAGS_THEN_SET_IRQ
)
609 start_enable_irq(smi_info
);
611 smi_info
->si_state
= SI_NORMAL
;
615 case SI_GETTING_EVENTS
:
617 smi_info
->curr_msg
->rsp_size
618 = smi_info
->handlers
->get_result(
620 smi_info
->curr_msg
->rsp
,
621 IPMI_MAX_MSG_LENGTH
);
624 * Do this here becase deliver_recv_msg() releases the
625 * lock, and a new message can be put in during the
626 * time the lock is released.
628 msg
= smi_info
->curr_msg
;
629 smi_info
->curr_msg
= NULL
;
630 if (msg
->rsp
[2] != 0) {
631 /* Error getting event, probably done. */
634 /* Take off the event flag. */
635 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
636 handle_flags(smi_info
);
638 smi_inc_stat(smi_info
, events
);
641 * Do this before we deliver the message
642 * because delivering the message releases the
643 * lock and something else can mess with the
646 handle_flags(smi_info
);
648 deliver_recv_msg(smi_info
, msg
);
653 case SI_GETTING_MESSAGES
:
655 smi_info
->curr_msg
->rsp_size
656 = smi_info
->handlers
->get_result(
658 smi_info
->curr_msg
->rsp
,
659 IPMI_MAX_MSG_LENGTH
);
662 * Do this here becase deliver_recv_msg() releases the
663 * lock, and a new message can be put in during the
664 * time the lock is released.
666 msg
= smi_info
->curr_msg
;
667 smi_info
->curr_msg
= NULL
;
668 if (msg
->rsp
[2] != 0) {
669 /* Error getting event, probably done. */
672 /* Take off the msg flag. */
673 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
674 handle_flags(smi_info
);
676 smi_inc_stat(smi_info
, incoming_messages
);
679 * Do this before we deliver the message
680 * because delivering the message releases the
681 * lock and something else can mess with the
684 handle_flags(smi_info
);
686 deliver_recv_msg(smi_info
, msg
);
691 case SI_ENABLE_INTERRUPTS1
:
693 unsigned char msg
[4];
695 /* We got the flags from the SMI, now handle them. */
696 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
698 dev_warn(smi_info
->dev
, "Could not enable interrupts"
699 ", failed get, using polled mode.\n");
700 smi_info
->si_state
= SI_NORMAL
;
702 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
703 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
705 IPMI_BMC_RCV_MSG_INTR
|
706 IPMI_BMC_EVT_MSG_INTR
);
707 smi_info
->handlers
->start_transaction(
708 smi_info
->si_sm
, msg
, 3);
709 smi_info
->si_state
= SI_ENABLE_INTERRUPTS2
;
714 case SI_ENABLE_INTERRUPTS2
:
716 unsigned char msg
[4];
718 /* We got the flags from the SMI, now handle them. */
719 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
721 dev_warn(smi_info
->dev
, "Could not enable interrupts"
722 ", failed set, using polled mode.\n");
724 smi_info
->interrupt_disabled
= 0;
725 smi_info
->si_state
= SI_NORMAL
;
729 case SI_DISABLE_INTERRUPTS1
:
731 unsigned char msg
[4];
733 /* We got the flags from the SMI, now handle them. */
734 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
736 dev_warn(smi_info
->dev
, "Could not disable interrupts"
738 smi_info
->si_state
= SI_NORMAL
;
740 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
741 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
743 ~(IPMI_BMC_RCV_MSG_INTR
|
744 IPMI_BMC_EVT_MSG_INTR
));
745 smi_info
->handlers
->start_transaction(
746 smi_info
->si_sm
, msg
, 3);
747 smi_info
->si_state
= SI_DISABLE_INTERRUPTS2
;
752 case SI_DISABLE_INTERRUPTS2
:
754 unsigned char msg
[4];
756 /* We got the flags from the SMI, now handle them. */
757 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
759 dev_warn(smi_info
->dev
, "Could not disable interrupts"
762 smi_info
->si_state
= SI_NORMAL
;
769 * Called on timeouts and events. Timeouts should pass the elapsed
770 * time, interrupts should pass in zero. Must be called with
771 * si_lock held and interrupts disabled.
773 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
776 enum si_sm_result si_sm_result
;
780 * There used to be a loop here that waited a little while
781 * (around 25us) before giving up. That turned out to be
782 * pointless, the minimum delays I was seeing were in the 300us
783 * range, which is far too long to wait in an interrupt. So
784 * we just run until the state machine tells us something
785 * happened or it needs a delay.
787 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
789 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
790 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
792 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
793 smi_inc_stat(smi_info
, complete_transactions
);
795 handle_transaction_done(smi_info
);
796 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
797 } else if (si_sm_result
== SI_SM_HOSED
) {
798 smi_inc_stat(smi_info
, hosed_count
);
801 * Do the before return_hosed_msg, because that
804 smi_info
->si_state
= SI_NORMAL
;
805 if (smi_info
->curr_msg
!= NULL
) {
807 * If we were handling a user message, format
808 * a response to send to the upper layer to
809 * tell it about the error.
811 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
813 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
817 * We prefer handling attn over new messages. But don't do
818 * this if there is not yet an upper layer to handle anything.
820 if (likely(smi_info
->intf
) && si_sm_result
== SI_SM_ATTN
) {
821 unsigned char msg
[2];
823 smi_inc_stat(smi_info
, attentions
);
826 * Got a attn, send down a get message flags to see
827 * what's causing it. It would be better to handle
828 * this in the upper layer, but due to the way
829 * interrupts work with the SMI, that's not really
832 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
833 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
835 smi_info
->handlers
->start_transaction(
836 smi_info
->si_sm
, msg
, 2);
837 smi_info
->si_state
= SI_GETTING_FLAGS
;
841 /* If we are currently idle, try to start the next message. */
842 if (si_sm_result
== SI_SM_IDLE
) {
843 smi_inc_stat(smi_info
, idles
);
845 si_sm_result
= start_next_msg(smi_info
);
846 if (si_sm_result
!= SI_SM_IDLE
)
850 if ((si_sm_result
== SI_SM_IDLE
)
851 && (atomic_read(&smi_info
->req_events
))) {
853 * We are idle and the upper layer requested that I fetch
856 atomic_set(&smi_info
->req_events
, 0);
858 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
859 if (!smi_info
->curr_msg
)
862 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
863 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
864 smi_info
->curr_msg
->data_size
= 2;
866 smi_info
->handlers
->start_transaction(
868 smi_info
->curr_msg
->data
,
869 smi_info
->curr_msg
->data_size
);
870 smi_info
->si_state
= SI_GETTING_EVENTS
;
877 static void sender(void *send_info
,
878 struct ipmi_smi_msg
*msg
,
881 struct smi_info
*smi_info
= send_info
;
882 enum si_sm_result result
;
888 if (atomic_read(&smi_info
->stop_operation
)) {
889 msg
->rsp
[0] = msg
->data
[0] | 4;
890 msg
->rsp
[1] = msg
->data
[1];
891 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
893 deliver_recv_msg(smi_info
, msg
);
899 printk("**Enqueue: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
902 mod_timer(&smi_info
->si_timer
, jiffies
+ SI_TIMEOUT_JIFFIES
);
904 if (smi_info
->thread
)
905 wake_up_process(smi_info
->thread
);
907 if (smi_info
->run_to_completion
) {
909 * If we are running to completion, then throw it in
910 * the list and run transactions until everything is
911 * clear. Priority doesn't matter here.
915 * Run to completion means we are single-threaded, no
918 list_add_tail(&(msg
->link
), &(smi_info
->xmit_msgs
));
920 result
= smi_event_handler(smi_info
, 0);
921 while (result
!= SI_SM_IDLE
) {
922 udelay(SI_SHORT_TIMEOUT_USEC
);
923 result
= smi_event_handler(smi_info
,
924 SI_SHORT_TIMEOUT_USEC
);
929 spin_lock_irqsave(&smi_info
->msg_lock
, flags
);
931 list_add_tail(&msg
->link
, &smi_info
->hp_xmit_msgs
);
933 list_add_tail(&msg
->link
, &smi_info
->xmit_msgs
);
934 spin_unlock_irqrestore(&smi_info
->msg_lock
, flags
);
936 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
937 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
)
938 start_next_msg(smi_info
);
939 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
942 static void set_run_to_completion(void *send_info
, int i_run_to_completion
)
944 struct smi_info
*smi_info
= send_info
;
945 enum si_sm_result result
;
947 smi_info
->run_to_completion
= i_run_to_completion
;
948 if (i_run_to_completion
) {
949 result
= smi_event_handler(smi_info
, 0);
950 while (result
!= SI_SM_IDLE
) {
951 udelay(SI_SHORT_TIMEOUT_USEC
);
952 result
= smi_event_handler(smi_info
,
953 SI_SHORT_TIMEOUT_USEC
);
959 * Use -1 in the nsec value of the busy waiting timespec to tell that
960 * we are spinning in kipmid looking for something and not delaying
963 static inline void ipmi_si_set_not_busy(struct timespec
*ts
)
967 static inline int ipmi_si_is_busy(struct timespec
*ts
)
969 return ts
->tv_nsec
!= -1;
972 static int ipmi_thread_busy_wait(enum si_sm_result smi_result
,
973 const struct smi_info
*smi_info
,
974 struct timespec
*busy_until
)
976 unsigned int max_busy_us
= 0;
978 if (smi_info
->intf_num
< num_max_busy_us
)
979 max_busy_us
= kipmid_max_busy_us
[smi_info
->intf_num
];
980 if (max_busy_us
== 0 || smi_result
!= SI_SM_CALL_WITH_DELAY
)
981 ipmi_si_set_not_busy(busy_until
);
982 else if (!ipmi_si_is_busy(busy_until
)) {
983 getnstimeofday(busy_until
);
984 timespec_add_ns(busy_until
, max_busy_us
*NSEC_PER_USEC
);
987 getnstimeofday(&now
);
988 if (unlikely(timespec_compare(&now
, busy_until
) > 0)) {
989 ipmi_si_set_not_busy(busy_until
);
998 * A busy-waiting loop for speeding up IPMI operation.
1000 * Lousy hardware makes this hard. This is only enabled for systems
1001 * that are not BT and do not have interrupts. It starts spinning
1002 * when an operation is complete or until max_busy tells it to stop
1003 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1004 * Documentation/IPMI.txt for details.
1006 static int ipmi_thread(void *data
)
1008 struct smi_info
*smi_info
= data
;
1009 unsigned long flags
;
1010 enum si_sm_result smi_result
;
1011 struct timespec busy_until
;
1013 ipmi_si_set_not_busy(&busy_until
);
1014 set_user_nice(current
, 19);
1015 while (!kthread_should_stop()) {
1018 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1019 smi_result
= smi_event_handler(smi_info
, 0);
1020 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1021 busy_wait
= ipmi_thread_busy_wait(smi_result
, smi_info
,
1023 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
1025 else if (smi_result
== SI_SM_CALL_WITH_DELAY
&& busy_wait
)
1027 else if (smi_result
== SI_SM_IDLE
)
1028 schedule_timeout_interruptible(100);
1030 schedule_timeout_interruptible(1);
1036 static void poll(void *send_info
)
1038 struct smi_info
*smi_info
= send_info
;
1039 unsigned long flags
;
1042 * Make sure there is some delay in the poll loop so we can
1043 * drive time forward and timeout things.
1046 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1047 smi_event_handler(smi_info
, 10);
1048 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1051 static void request_events(void *send_info
)
1053 struct smi_info
*smi_info
= send_info
;
1055 if (atomic_read(&smi_info
->stop_operation
) ||
1056 !smi_info
->has_event_buffer
)
1059 atomic_set(&smi_info
->req_events
, 1);
1062 static int initialized
;
1064 static void smi_timeout(unsigned long data
)
1066 struct smi_info
*smi_info
= (struct smi_info
*) data
;
1067 enum si_sm_result smi_result
;
1068 unsigned long flags
;
1069 unsigned long jiffies_now
;
1076 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1078 do_gettimeofday(&t
);
1079 printk(KERN_DEBUG
"**Timer: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1081 jiffies_now
= jiffies
;
1082 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
1083 * SI_USEC_PER_JIFFY
);
1084 smi_result
= smi_event_handler(smi_info
, time_diff
);
1086 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1088 smi_info
->last_timeout_jiffies
= jiffies_now
;
1090 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1091 /* Running with interrupts, only do long timeouts. */
1092 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1093 smi_inc_stat(smi_info
, long_timeouts
);
1098 * If the state machine asks for a short delay, then shorten
1099 * the timer timeout.
1101 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1102 smi_inc_stat(smi_info
, short_timeouts
);
1103 timeout
= jiffies
+ 1;
1105 smi_inc_stat(smi_info
, long_timeouts
);
1106 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1110 if (smi_result
!= SI_SM_IDLE
)
1111 mod_timer(&(smi_info
->si_timer
), timeout
);
1114 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1116 struct smi_info
*smi_info
= data
;
1117 unsigned long flags
;
1122 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1124 smi_inc_stat(smi_info
, interrupts
);
1127 do_gettimeofday(&t
);
1128 printk(KERN_DEBUG
"**Interrupt: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1130 smi_event_handler(smi_info
, 0);
1131 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1135 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1137 struct smi_info
*smi_info
= data
;
1138 /* We need to clear the IRQ flag for the BT interface. */
1139 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1140 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1141 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1142 return si_irq_handler(irq
, data
);
1145 static int smi_start_processing(void *send_info
,
1148 struct smi_info
*new_smi
= send_info
;
1151 new_smi
->intf
= intf
;
1153 /* Try to claim any interrupts. */
1154 if (new_smi
->irq_setup
)
1155 new_smi
->irq_setup(new_smi
);
1157 /* Set up the timer that drives the interface. */
1158 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1159 new_smi
->last_timeout_jiffies
= jiffies
;
1160 mod_timer(&new_smi
->si_timer
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1163 * Check if the user forcefully enabled the daemon.
1165 if (new_smi
->intf_num
< num_force_kipmid
)
1166 enable
= force_kipmid
[new_smi
->intf_num
];
1168 * The BT interface is efficient enough to not need a thread,
1169 * and there is no need for a thread if we have interrupts.
1171 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1175 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1176 "kipmi%d", new_smi
->intf_num
);
1177 if (IS_ERR(new_smi
->thread
)) {
1178 dev_notice(new_smi
->dev
, "Could not start"
1179 " kernel thread due to error %ld, only using"
1180 " timers to drive the interface\n",
1181 PTR_ERR(new_smi
->thread
));
1182 new_smi
->thread
= NULL
;
1189 static void set_maintenance_mode(void *send_info
, int enable
)
1191 struct smi_info
*smi_info
= send_info
;
1194 atomic_set(&smi_info
->req_events
, 0);
1197 static struct ipmi_smi_handlers handlers
= {
1198 .owner
= THIS_MODULE
,
1199 .start_processing
= smi_start_processing
,
1201 .request_events
= request_events
,
1202 .set_maintenance_mode
= set_maintenance_mode
,
1203 .set_run_to_completion
= set_run_to_completion
,
1208 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1209 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1212 static LIST_HEAD(smi_infos
);
1213 static DEFINE_MUTEX(smi_infos_lock
);
1214 static int smi_num
; /* Used to sequence the SMIs */
1216 #define DEFAULT_REGSPACING 1
1217 #define DEFAULT_REGSIZE 1
1219 static int si_trydefaults
= 1;
1220 static char *si_type
[SI_MAX_PARMS
];
1221 #define MAX_SI_TYPE_STR 30
1222 static char si_type_str
[MAX_SI_TYPE_STR
];
1223 static unsigned long addrs
[SI_MAX_PARMS
];
1224 static unsigned int num_addrs
;
1225 static unsigned int ports
[SI_MAX_PARMS
];
1226 static unsigned int num_ports
;
1227 static int irqs
[SI_MAX_PARMS
];
1228 static unsigned int num_irqs
;
1229 static int regspacings
[SI_MAX_PARMS
];
1230 static unsigned int num_regspacings
;
1231 static int regsizes
[SI_MAX_PARMS
];
1232 static unsigned int num_regsizes
;
1233 static int regshifts
[SI_MAX_PARMS
];
1234 static unsigned int num_regshifts
;
1235 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1236 static unsigned int num_slave_addrs
;
1238 #define IPMI_IO_ADDR_SPACE 0
1239 #define IPMI_MEM_ADDR_SPACE 1
1240 static char *addr_space_to_str
[] = { "i/o", "mem" };
1242 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1244 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1245 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1246 " Documentation/IPMI.txt in the kernel sources for the"
1249 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1250 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1251 " default scan of the KCS and SMIC interface at the standard"
1253 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1254 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1255 " interface separated by commas. The types are 'kcs',"
1256 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1257 " the first interface to kcs and the second to bt");
1258 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1259 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1260 " addresses separated by commas. Only use if an interface"
1261 " is in memory. Otherwise, set it to zero or leave"
1263 module_param_array(ports
, uint
, &num_ports
, 0);
1264 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1265 " addresses separated by commas. Only use if an interface"
1266 " is a port. Otherwise, set it to zero or leave"
1268 module_param_array(irqs
, int, &num_irqs
, 0);
1269 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1270 " addresses separated by commas. Only use if an interface"
1271 " has an interrupt. Otherwise, set it to zero or leave"
1273 module_param_array(regspacings
, int, &num_regspacings
, 0);
1274 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1275 " and each successive register used by the interface. For"
1276 " instance, if the start address is 0xca2 and the spacing"
1277 " is 2, then the second address is at 0xca4. Defaults"
1279 module_param_array(regsizes
, int, &num_regsizes
, 0);
1280 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1281 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1282 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1283 " the 8-bit IPMI register has to be read from a larger"
1285 module_param_array(regshifts
, int, &num_regshifts
, 0);
1286 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1287 " IPMI register, in bits. For instance, if the data"
1288 " is read from a 32-bit word and the IPMI data is in"
1289 " bit 8-15, then the shift would be 8");
1290 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1291 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1292 " the controller. Normally this is 0x20, but can be"
1293 " overridden by this parm. This is an array indexed"
1294 " by interface number.");
1295 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1296 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1297 " disabled(0). Normally the IPMI driver auto-detects"
1298 " this, but the value may be overridden by this parm.");
1299 module_param(unload_when_empty
, int, 0);
1300 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1301 " specified or found, default is 1. Setting to 0"
1302 " is useful for hot add of devices using hotmod.");
1303 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1304 MODULE_PARM_DESC(kipmid_max_busy_us
,
1305 "Max time (in microseconds) to busy-wait for IPMI data before"
1306 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1307 " if kipmid is using up a lot of CPU time.");
1310 static void std_irq_cleanup(struct smi_info
*info
)
1312 if (info
->si_type
== SI_BT
)
1313 /* Disable the interrupt in the BT interface. */
1314 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1315 free_irq(info
->irq
, info
);
1318 static int std_irq_setup(struct smi_info
*info
)
1325 if (info
->si_type
== SI_BT
) {
1326 rv
= request_irq(info
->irq
,
1328 IRQF_SHARED
| IRQF_DISABLED
,
1332 /* Enable the interrupt in the BT interface. */
1333 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1334 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1336 rv
= request_irq(info
->irq
,
1338 IRQF_SHARED
| IRQF_DISABLED
,
1342 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1343 " running polled\n",
1344 DEVICE_NAME
, info
->irq
);
1347 info
->irq_cleanup
= std_irq_cleanup
;
1348 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1354 static unsigned char port_inb(struct si_sm_io
*io
, unsigned int offset
)
1356 unsigned int addr
= io
->addr_data
;
1358 return inb(addr
+ (offset
* io
->regspacing
));
1361 static void port_outb(struct si_sm_io
*io
, unsigned int offset
,
1364 unsigned int addr
= io
->addr_data
;
1366 outb(b
, addr
+ (offset
* io
->regspacing
));
1369 static unsigned char port_inw(struct si_sm_io
*io
, unsigned int offset
)
1371 unsigned int addr
= io
->addr_data
;
1373 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1376 static void port_outw(struct si_sm_io
*io
, unsigned int offset
,
1379 unsigned int addr
= io
->addr_data
;
1381 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1384 static unsigned char port_inl(struct si_sm_io
*io
, unsigned int offset
)
1386 unsigned int addr
= io
->addr_data
;
1388 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1391 static void port_outl(struct si_sm_io
*io
, unsigned int offset
,
1394 unsigned int addr
= io
->addr_data
;
1396 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1399 static void port_cleanup(struct smi_info
*info
)
1401 unsigned int addr
= info
->io
.addr_data
;
1405 for (idx
= 0; idx
< info
->io_size
; idx
++)
1406 release_region(addr
+ idx
* info
->io
.regspacing
,
1411 static int port_setup(struct smi_info
*info
)
1413 unsigned int addr
= info
->io
.addr_data
;
1419 info
->io_cleanup
= port_cleanup
;
1422 * Figure out the actual inb/inw/inl/etc routine to use based
1423 * upon the register size.
1425 switch (info
->io
.regsize
) {
1427 info
->io
.inputb
= port_inb
;
1428 info
->io
.outputb
= port_outb
;
1431 info
->io
.inputb
= port_inw
;
1432 info
->io
.outputb
= port_outw
;
1435 info
->io
.inputb
= port_inl
;
1436 info
->io
.outputb
= port_outl
;
1439 dev_warn(info
->dev
, "Invalid register size: %d\n",
1445 * Some BIOSes reserve disjoint I/O regions in their ACPI
1446 * tables. This causes problems when trying to register the
1447 * entire I/O region. Therefore we must register each I/O
1450 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1451 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1452 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1453 /* Undo allocations */
1455 release_region(addr
+ idx
* info
->io
.regspacing
,
1464 static unsigned char intf_mem_inb(struct si_sm_io
*io
, unsigned int offset
)
1466 return readb((io
->addr
)+(offset
* io
->regspacing
));
1469 static void intf_mem_outb(struct si_sm_io
*io
, unsigned int offset
,
1472 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1475 static unsigned char intf_mem_inw(struct si_sm_io
*io
, unsigned int offset
)
1477 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1481 static void intf_mem_outw(struct si_sm_io
*io
, unsigned int offset
,
1484 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1487 static unsigned char intf_mem_inl(struct si_sm_io
*io
, unsigned int offset
)
1489 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1493 static void intf_mem_outl(struct si_sm_io
*io
, unsigned int offset
,
1496 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1500 static unsigned char mem_inq(struct si_sm_io
*io
, unsigned int offset
)
1502 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1506 static void mem_outq(struct si_sm_io
*io
, unsigned int offset
,
1509 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1513 static void mem_cleanup(struct smi_info
*info
)
1515 unsigned long addr
= info
->io
.addr_data
;
1518 if (info
->io
.addr
) {
1519 iounmap(info
->io
.addr
);
1521 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1522 - (info
->io
.regspacing
- info
->io
.regsize
));
1524 release_mem_region(addr
, mapsize
);
1528 static int mem_setup(struct smi_info
*info
)
1530 unsigned long addr
= info
->io
.addr_data
;
1536 info
->io_cleanup
= mem_cleanup
;
1539 * Figure out the actual readb/readw/readl/etc routine to use based
1540 * upon the register size.
1542 switch (info
->io
.regsize
) {
1544 info
->io
.inputb
= intf_mem_inb
;
1545 info
->io
.outputb
= intf_mem_outb
;
1548 info
->io
.inputb
= intf_mem_inw
;
1549 info
->io
.outputb
= intf_mem_outw
;
1552 info
->io
.inputb
= intf_mem_inl
;
1553 info
->io
.outputb
= intf_mem_outl
;
1557 info
->io
.inputb
= mem_inq
;
1558 info
->io
.outputb
= mem_outq
;
1562 dev_warn(info
->dev
, "Invalid register size: %d\n",
1568 * Calculate the total amount of memory to claim. This is an
1569 * unusual looking calculation, but it avoids claiming any
1570 * more memory than it has to. It will claim everything
1571 * between the first address to the end of the last full
1574 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1575 - (info
->io
.regspacing
- info
->io
.regsize
));
1577 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1580 info
->io
.addr
= ioremap(addr
, mapsize
);
1581 if (info
->io
.addr
== NULL
) {
1582 release_mem_region(addr
, mapsize
);
1589 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1590 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1598 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1599 struct hotmod_vals
{
1603 static struct hotmod_vals hotmod_ops
[] = {
1605 { "remove", HM_REMOVE
},
1608 static struct hotmod_vals hotmod_si
[] = {
1610 { "smic", SI_SMIC
},
1614 static struct hotmod_vals hotmod_as
[] = {
1615 { "mem", IPMI_MEM_ADDR_SPACE
},
1616 { "i/o", IPMI_IO_ADDR_SPACE
},
1620 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1625 s
= strchr(*curr
, ',');
1627 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1632 for (i
= 0; hotmod_ops
[i
].name
; i
++) {
1633 if (strcmp(*curr
, v
[i
].name
) == 0) {
1640 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1644 static int check_hotmod_int_op(const char *curr
, const char *option
,
1645 const char *name
, int *val
)
1649 if (strcmp(curr
, name
) == 0) {
1651 printk(KERN_WARNING PFX
1652 "No option given for '%s'\n",
1656 *val
= simple_strtoul(option
, &n
, 0);
1657 if ((*n
!= '\0') || (*option
== '\0')) {
1658 printk(KERN_WARNING PFX
1659 "Bad option given for '%s'\n",
1668 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1670 char *str
= kstrdup(val
, GFP_KERNEL
);
1672 char *next
, *curr
, *s
, *n
, *o
;
1674 enum si_type si_type
;
1684 struct smi_info
*info
;
1689 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1692 while ((ival
>= 0) && isspace(str
[ival
])) {
1697 for (curr
= str
; curr
; curr
= next
) {
1702 ipmb
= 0; /* Choose the default if not specified */
1704 next
= strchr(curr
, ':');
1710 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1715 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1720 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1724 s
= strchr(curr
, ',');
1729 addr
= simple_strtoul(curr
, &n
, 0);
1730 if ((*n
!= '\0') || (*curr
== '\0')) {
1731 printk(KERN_WARNING PFX
"Invalid hotmod address"
1738 s
= strchr(curr
, ',');
1743 o
= strchr(curr
, '=');
1748 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1753 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1758 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1763 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1768 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1775 printk(KERN_WARNING PFX
1776 "Invalid hotmod option '%s'\n",
1782 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1788 info
->addr_source
= SI_HOTMOD
;
1789 info
->si_type
= si_type
;
1790 info
->io
.addr_data
= addr
;
1791 info
->io
.addr_type
= addr_space
;
1792 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1793 info
->io_setup
= mem_setup
;
1795 info
->io_setup
= port_setup
;
1797 info
->io
.addr
= NULL
;
1798 info
->io
.regspacing
= regspacing
;
1799 if (!info
->io
.regspacing
)
1800 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1801 info
->io
.regsize
= regsize
;
1802 if (!info
->io
.regsize
)
1803 info
->io
.regsize
= DEFAULT_REGSPACING
;
1804 info
->io
.regshift
= regshift
;
1807 info
->irq_setup
= std_irq_setup
;
1808 info
->slave_addr
= ipmb
;
1810 if (!add_smi(info
)) {
1811 if (try_smi_init(info
))
1812 cleanup_one_si(info
);
1818 struct smi_info
*e
, *tmp_e
;
1820 mutex_lock(&smi_infos_lock
);
1821 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1822 if (e
->io
.addr_type
!= addr_space
)
1824 if (e
->si_type
!= si_type
)
1826 if (e
->io
.addr_data
== addr
)
1829 mutex_unlock(&smi_infos_lock
);
1838 static __devinit
void hardcode_find_bmc(void)
1841 struct smi_info
*info
;
1843 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1844 if (!ports
[i
] && !addrs
[i
])
1847 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1851 info
->addr_source
= SI_HARDCODED
;
1852 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1854 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1855 info
->si_type
= SI_KCS
;
1856 } else if (strcmp(si_type
[i
], "smic") == 0) {
1857 info
->si_type
= SI_SMIC
;
1858 } else if (strcmp(si_type
[i
], "bt") == 0) {
1859 info
->si_type
= SI_BT
;
1861 printk(KERN_WARNING PFX
"Interface type specified "
1862 "for interface %d, was invalid: %s\n",
1870 info
->io_setup
= port_setup
;
1871 info
->io
.addr_data
= ports
[i
];
1872 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1873 } else if (addrs
[i
]) {
1875 info
->io_setup
= mem_setup
;
1876 info
->io
.addr_data
= addrs
[i
];
1877 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1879 printk(KERN_WARNING PFX
"Interface type specified "
1880 "for interface %d, but port and address were "
1881 "not set or set to zero.\n", i
);
1886 info
->io
.addr
= NULL
;
1887 info
->io
.regspacing
= regspacings
[i
];
1888 if (!info
->io
.regspacing
)
1889 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1890 info
->io
.regsize
= regsizes
[i
];
1891 if (!info
->io
.regsize
)
1892 info
->io
.regsize
= DEFAULT_REGSPACING
;
1893 info
->io
.regshift
= regshifts
[i
];
1894 info
->irq
= irqs
[i
];
1896 info
->irq_setup
= std_irq_setup
;
1897 info
->slave_addr
= slave_addrs
[i
];
1899 if (!add_smi(info
)) {
1900 if (try_smi_init(info
))
1901 cleanup_one_si(info
);
1910 #include <linux/acpi.h>
1913 * Once we get an ACPI failure, we don't try any more, because we go
1914 * through the tables sequentially. Once we don't find a table, there
1917 static int acpi_failure
;
1919 /* For GPE-type interrupts. */
1920 static u32
ipmi_acpi_gpe(void *context
)
1922 struct smi_info
*smi_info
= context
;
1923 unsigned long flags
;
1928 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1930 smi_inc_stat(smi_info
, interrupts
);
1933 do_gettimeofday(&t
);
1934 printk("**ACPI_GPE: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1936 smi_event_handler(smi_info
, 0);
1937 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1939 return ACPI_INTERRUPT_HANDLED
;
1942 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
1947 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
1950 static int acpi_gpe_irq_setup(struct smi_info
*info
)
1957 /* FIXME - is level triggered right? */
1958 status
= acpi_install_gpe_handler(NULL
,
1960 ACPI_GPE_LEVEL_TRIGGERED
,
1963 if (status
!= AE_OK
) {
1964 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
1965 " running polled\n", DEVICE_NAME
, info
->irq
);
1969 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
1970 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
1977 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
1988 s8 CreatorRevision
[4];
1991 s16 SpecificationRevision
;
1994 * Bit 0 - SCI interrupt supported
1995 * Bit 1 - I/O APIC/SAPIC
2000 * If bit 0 of InterruptType is set, then this is the SCI
2001 * interrupt in the GPEx_STS register.
2008 * If bit 1 of InterruptType is set, then this is the I/O
2009 * APIC/SAPIC interrupt.
2011 u32 GlobalSystemInterrupt
;
2013 /* The actual register address. */
2014 struct acpi_generic_address addr
;
2018 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2021 static __devinit
int try_init_spmi(struct SPMITable
*spmi
)
2023 struct smi_info
*info
;
2025 if (spmi
->IPMIlegacy
!= 1) {
2026 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2030 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2032 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2036 info
->addr_source
= SI_SPMI
;
2037 printk(KERN_INFO PFX
"probing via SPMI\n");
2039 /* Figure out the interface type. */
2040 switch (spmi
->InterfaceType
) {
2042 info
->si_type
= SI_KCS
;
2045 info
->si_type
= SI_SMIC
;
2048 info
->si_type
= SI_BT
;
2051 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2052 spmi
->InterfaceType
);
2057 if (spmi
->InterruptType
& 1) {
2058 /* We've got a GPE interrupt. */
2059 info
->irq
= spmi
->GPE
;
2060 info
->irq_setup
= acpi_gpe_irq_setup
;
2061 } else if (spmi
->InterruptType
& 2) {
2062 /* We've got an APIC/SAPIC interrupt. */
2063 info
->irq
= spmi
->GlobalSystemInterrupt
;
2064 info
->irq_setup
= std_irq_setup
;
2066 /* Use the default interrupt setting. */
2068 info
->irq_setup
= NULL
;
2071 if (spmi
->addr
.bit_width
) {
2072 /* A (hopefully) properly formed register bit width. */
2073 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2075 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2077 info
->io
.regsize
= info
->io
.regspacing
;
2078 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2080 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2081 info
->io_setup
= mem_setup
;
2082 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2083 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2084 info
->io_setup
= port_setup
;
2085 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2088 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2091 info
->io
.addr_data
= spmi
->addr
.address
;
2093 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2094 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2095 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2104 static __devinit
void spmi_find_bmc(void)
2107 struct SPMITable
*spmi
;
2116 for (i
= 0; ; i
++) {
2117 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2118 (struct acpi_table_header
**)&spmi
);
2119 if (status
!= AE_OK
)
2122 try_init_spmi(spmi
);
2126 static int __devinit
ipmi_pnp_probe(struct pnp_dev
*dev
,
2127 const struct pnp_device_id
*dev_id
)
2129 struct acpi_device
*acpi_dev
;
2130 struct smi_info
*info
;
2131 struct resource
*res
, *res_second
;
2134 unsigned long long tmp
;
2136 acpi_dev
= pnp_acpi_device(dev
);
2140 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2144 info
->addr_source
= SI_ACPI
;
2145 printk(KERN_INFO PFX
"probing via ACPI\n");
2147 handle
= acpi_dev
->handle
;
2149 /* _IFT tells us the interface type: KCS, BT, etc */
2150 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2151 if (ACPI_FAILURE(status
))
2156 info
->si_type
= SI_KCS
;
2159 info
->si_type
= SI_SMIC
;
2162 info
->si_type
= SI_BT
;
2165 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2169 res
= pnp_get_resource(dev
, IORESOURCE_IO
, 0);
2171 info
->io_setup
= port_setup
;
2172 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2174 res
= pnp_get_resource(dev
, IORESOURCE_MEM
, 0);
2176 info
->io_setup
= mem_setup
;
2177 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2181 dev_err(&dev
->dev
, "no I/O or memory address\n");
2184 info
->io
.addr_data
= res
->start
;
2186 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2187 res_second
= pnp_get_resource(dev
,
2188 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2189 IORESOURCE_IO
: IORESOURCE_MEM
,
2192 if (res_second
->start
> info
->io
.addr_data
)
2193 info
->io
.regspacing
= res_second
->start
- info
->io
.addr_data
;
2195 info
->io
.regsize
= DEFAULT_REGSPACING
;
2196 info
->io
.regshift
= 0;
2198 /* If _GPE exists, use it; otherwise use standard interrupts */
2199 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2200 if (ACPI_SUCCESS(status
)) {
2202 info
->irq_setup
= acpi_gpe_irq_setup
;
2203 } else if (pnp_irq_valid(dev
, 0)) {
2204 info
->irq
= pnp_irq(dev
, 0);
2205 info
->irq_setup
= std_irq_setup
;
2208 info
->dev
= &dev
->dev
;
2209 pnp_set_drvdata(dev
, info
);
2211 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2212 res
, info
->io
.regsize
, info
->io
.regspacing
,
2225 static void __devexit
ipmi_pnp_remove(struct pnp_dev
*dev
)
2227 struct smi_info
*info
= pnp_get_drvdata(dev
);
2229 cleanup_one_si(info
);
2232 static const struct pnp_device_id pnp_dev_table
[] = {
2237 static struct pnp_driver ipmi_pnp_driver
= {
2238 .name
= DEVICE_NAME
,
2239 .probe
= ipmi_pnp_probe
,
2240 .remove
= __devexit_p(ipmi_pnp_remove
),
2241 .id_table
= pnp_dev_table
,
2246 struct dmi_ipmi_data
{
2249 unsigned long base_addr
;
2255 static int __devinit
decode_dmi(const struct dmi_header
*dm
,
2256 struct dmi_ipmi_data
*dmi
)
2258 const u8
*data
= (const u8
*)dm
;
2259 unsigned long base_addr
;
2261 u8 len
= dm
->length
;
2263 dmi
->type
= data
[4];
2265 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2267 if (base_addr
& 1) {
2269 base_addr
&= 0xFFFE;
2270 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2273 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2275 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2277 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2279 dmi
->irq
= data
[0x11];
2281 /* The top two bits of byte 0x10 hold the register spacing. */
2282 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2283 switch (reg_spacing
) {
2284 case 0x00: /* Byte boundaries */
2287 case 0x01: /* 32-bit boundaries */
2290 case 0x02: /* 16-byte boundaries */
2294 /* Some other interface, just ignore it. */
2300 * Note that technically, the lower bit of the base
2301 * address should be 1 if the address is I/O and 0 if
2302 * the address is in memory. So many systems get that
2303 * wrong (and all that I have seen are I/O) so we just
2304 * ignore that bit and assume I/O. Systems that use
2305 * memory should use the newer spec, anyway.
2307 dmi
->base_addr
= base_addr
& 0xfffe;
2308 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2312 dmi
->slave_addr
= data
[6];
2317 static __devinit
void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2319 struct smi_info
*info
;
2321 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2323 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2327 info
->addr_source
= SI_SMBIOS
;
2328 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2330 switch (ipmi_data
->type
) {
2331 case 0x01: /* KCS */
2332 info
->si_type
= SI_KCS
;
2334 case 0x02: /* SMIC */
2335 info
->si_type
= SI_SMIC
;
2338 info
->si_type
= SI_BT
;
2345 switch (ipmi_data
->addr_space
) {
2346 case IPMI_MEM_ADDR_SPACE
:
2347 info
->io_setup
= mem_setup
;
2348 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2351 case IPMI_IO_ADDR_SPACE
:
2352 info
->io_setup
= port_setup
;
2353 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2358 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2359 ipmi_data
->addr_space
);
2362 info
->io
.addr_data
= ipmi_data
->base_addr
;
2364 info
->io
.regspacing
= ipmi_data
->offset
;
2365 if (!info
->io
.regspacing
)
2366 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2367 info
->io
.regsize
= DEFAULT_REGSPACING
;
2368 info
->io
.regshift
= 0;
2370 info
->slave_addr
= ipmi_data
->slave_addr
;
2372 info
->irq
= ipmi_data
->irq
;
2374 info
->irq_setup
= std_irq_setup
;
2376 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2377 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2378 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2385 static void __devinit
dmi_find_bmc(void)
2387 const struct dmi_device
*dev
= NULL
;
2388 struct dmi_ipmi_data data
;
2391 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2392 memset(&data
, 0, sizeof(data
));
2393 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2396 try_init_dmi(&data
);
2399 #endif /* CONFIG_DMI */
2403 #define PCI_ERMC_CLASSCODE 0x0C0700
2404 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2405 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2406 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2407 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2408 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2410 #define PCI_HP_VENDOR_ID 0x103C
2411 #define PCI_MMC_DEVICE_ID 0x121A
2412 #define PCI_MMC_ADDR_CW 0x10
2414 static void ipmi_pci_cleanup(struct smi_info
*info
)
2416 struct pci_dev
*pdev
= info
->addr_source_data
;
2418 pci_disable_device(pdev
);
2421 static int __devinit
ipmi_pci_probe(struct pci_dev
*pdev
,
2422 const struct pci_device_id
*ent
)
2425 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2426 struct smi_info
*info
;
2428 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2432 info
->addr_source
= SI_PCI
;
2433 dev_info(&pdev
->dev
, "probing via PCI");
2435 switch (class_type
) {
2436 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2437 info
->si_type
= SI_SMIC
;
2440 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2441 info
->si_type
= SI_KCS
;
2444 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2445 info
->si_type
= SI_BT
;
2450 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2454 rv
= pci_enable_device(pdev
);
2456 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2461 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2462 info
->addr_source_data
= pdev
;
2464 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2465 info
->io_setup
= port_setup
;
2466 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2468 info
->io_setup
= mem_setup
;
2469 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2471 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2473 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2474 info
->io
.regsize
= DEFAULT_REGSPACING
;
2475 info
->io
.regshift
= 0;
2477 info
->irq
= pdev
->irq
;
2479 info
->irq_setup
= std_irq_setup
;
2481 info
->dev
= &pdev
->dev
;
2482 pci_set_drvdata(pdev
, info
);
2484 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2485 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2494 static void __devexit
ipmi_pci_remove(struct pci_dev
*pdev
)
2496 struct smi_info
*info
= pci_get_drvdata(pdev
);
2497 cleanup_one_si(info
);
2501 static int ipmi_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2506 static int ipmi_pci_resume(struct pci_dev
*pdev
)
2512 static struct pci_device_id ipmi_pci_devices
[] = {
2513 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2514 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2517 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2519 static struct pci_driver ipmi_pci_driver
= {
2520 .name
= DEVICE_NAME
,
2521 .id_table
= ipmi_pci_devices
,
2522 .probe
= ipmi_pci_probe
,
2523 .remove
= __devexit_p(ipmi_pci_remove
),
2525 .suspend
= ipmi_pci_suspend
,
2526 .resume
= ipmi_pci_resume
,
2529 #endif /* CONFIG_PCI */
2532 #ifdef CONFIG_PPC_OF
2533 static int __devinit
ipmi_of_probe(struct platform_device
*dev
,
2534 const struct of_device_id
*match
)
2536 struct smi_info
*info
;
2537 struct resource resource
;
2538 const int *regsize
, *regspacing
, *regshift
;
2539 struct device_node
*np
= dev
->dev
.of_node
;
2543 dev_info(&dev
->dev
, "probing via device tree\n");
2545 ret
= of_address_to_resource(np
, 0, &resource
);
2547 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2551 regsize
= of_get_property(np
, "reg-size", &proplen
);
2552 if (regsize
&& proplen
!= 4) {
2553 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2557 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2558 if (regspacing
&& proplen
!= 4) {
2559 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2563 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2564 if (regshift
&& proplen
!= 4) {
2565 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2569 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
2573 "could not allocate memory for OF probe\n");
2577 info
->si_type
= (enum si_type
) match
->data
;
2578 info
->addr_source
= SI_DEVICETREE
;
2579 info
->irq_setup
= std_irq_setup
;
2581 if (resource
.flags
& IORESOURCE_IO
) {
2582 info
->io_setup
= port_setup
;
2583 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2585 info
->io_setup
= mem_setup
;
2586 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2589 info
->io
.addr_data
= resource
.start
;
2591 info
->io
.regsize
= regsize
? *regsize
: DEFAULT_REGSIZE
;
2592 info
->io
.regspacing
= regspacing
? *regspacing
: DEFAULT_REGSPACING
;
2593 info
->io
.regshift
= regshift
? *regshift
: 0;
2595 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2596 info
->dev
= &dev
->dev
;
2598 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2599 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2602 dev_set_drvdata(&dev
->dev
, info
);
2604 if (add_smi(info
)) {
2612 static int __devexit
ipmi_of_remove(struct platform_device
*dev
)
2614 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2618 static struct of_device_id ipmi_match
[] =
2620 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2621 .data
= (void *)(unsigned long) SI_KCS
},
2622 { .type
= "ipmi", .compatible
= "ipmi-smic",
2623 .data
= (void *)(unsigned long) SI_SMIC
},
2624 { .type
= "ipmi", .compatible
= "ipmi-bt",
2625 .data
= (void *)(unsigned long) SI_BT
},
2629 static struct of_platform_driver ipmi_of_platform_driver
= {
2632 .owner
= THIS_MODULE
,
2633 .of_match_table
= ipmi_match
,
2635 .probe
= ipmi_of_probe
,
2636 .remove
= __devexit_p(ipmi_of_remove
),
2638 #endif /* CONFIG_PPC_OF */
2640 static int wait_for_msg_done(struct smi_info
*smi_info
)
2642 enum si_sm_result smi_result
;
2644 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2646 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2647 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2648 schedule_timeout_uninterruptible(1);
2649 smi_result
= smi_info
->handlers
->event(
2650 smi_info
->si_sm
, 100);
2651 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2652 smi_result
= smi_info
->handlers
->event(
2653 smi_info
->si_sm
, 0);
2657 if (smi_result
== SI_SM_HOSED
)
2659 * We couldn't get the state machine to run, so whatever's at
2660 * the port is probably not an IPMI SMI interface.
2667 static int try_get_dev_id(struct smi_info
*smi_info
)
2669 unsigned char msg
[2];
2670 unsigned char *resp
;
2671 unsigned long resp_len
;
2674 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2679 * Do a Get Device ID command, since it comes back with some
2682 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2683 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2684 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2686 rv
= wait_for_msg_done(smi_info
);
2690 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2691 resp
, IPMI_MAX_MSG_LENGTH
);
2693 /* Check and record info from the get device id, in case we need it. */
2694 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2701 static int try_enable_event_buffer(struct smi_info
*smi_info
)
2703 unsigned char msg
[3];
2704 unsigned char *resp
;
2705 unsigned long resp_len
;
2708 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2712 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2713 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2714 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2716 rv
= wait_for_msg_done(smi_info
);
2718 printk(KERN_WARNING PFX
"Error getting response from get"
2719 " global enables command, the event buffer is not"
2724 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2725 resp
, IPMI_MAX_MSG_LENGTH
);
2728 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2729 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2731 printk(KERN_WARNING PFX
"Invalid return from get global"
2732 " enables command, cannot enable the event buffer.\n");
2737 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
)
2738 /* buffer is already enabled, nothing to do. */
2741 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2742 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2743 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
2744 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2746 rv
= wait_for_msg_done(smi_info
);
2748 printk(KERN_WARNING PFX
"Error getting response from set"
2749 " global, enables command, the event buffer is not"
2754 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2755 resp
, IPMI_MAX_MSG_LENGTH
);
2758 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2759 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
2760 printk(KERN_WARNING PFX
"Invalid return from get global,"
2761 "enables command, not enable the event buffer.\n");
2768 * An error when setting the event buffer bit means
2769 * that the event buffer is not supported.
2777 static int type_file_read_proc(char *page
, char **start
, off_t off
,
2778 int count
, int *eof
, void *data
)
2780 struct smi_info
*smi
= data
;
2782 return sprintf(page
, "%s\n", si_to_str
[smi
->si_type
]);
2785 static int stat_file_read_proc(char *page
, char **start
, off_t off
,
2786 int count
, int *eof
, void *data
)
2788 char *out
= (char *) page
;
2789 struct smi_info
*smi
= data
;
2791 out
+= sprintf(out
, "interrupts_enabled: %d\n",
2792 smi
->irq
&& !smi
->interrupt_disabled
);
2793 out
+= sprintf(out
, "short_timeouts: %u\n",
2794 smi_get_stat(smi
, short_timeouts
));
2795 out
+= sprintf(out
, "long_timeouts: %u\n",
2796 smi_get_stat(smi
, long_timeouts
));
2797 out
+= sprintf(out
, "idles: %u\n",
2798 smi_get_stat(smi
, idles
));
2799 out
+= sprintf(out
, "interrupts: %u\n",
2800 smi_get_stat(smi
, interrupts
));
2801 out
+= sprintf(out
, "attentions: %u\n",
2802 smi_get_stat(smi
, attentions
));
2803 out
+= sprintf(out
, "flag_fetches: %u\n",
2804 smi_get_stat(smi
, flag_fetches
));
2805 out
+= sprintf(out
, "hosed_count: %u\n",
2806 smi_get_stat(smi
, hosed_count
));
2807 out
+= sprintf(out
, "complete_transactions: %u\n",
2808 smi_get_stat(smi
, complete_transactions
));
2809 out
+= sprintf(out
, "events: %u\n",
2810 smi_get_stat(smi
, events
));
2811 out
+= sprintf(out
, "watchdog_pretimeouts: %u\n",
2812 smi_get_stat(smi
, watchdog_pretimeouts
));
2813 out
+= sprintf(out
, "incoming_messages: %u\n",
2814 smi_get_stat(smi
, incoming_messages
));
2819 static int param_read_proc(char *page
, char **start
, off_t off
,
2820 int count
, int *eof
, void *data
)
2822 struct smi_info
*smi
= data
;
2824 return sprintf(page
,
2825 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2826 si_to_str
[smi
->si_type
],
2827 addr_space_to_str
[smi
->io
.addr_type
],
2837 * oem_data_avail_to_receive_msg_avail
2838 * @info - smi_info structure with msg_flags set
2840 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2841 * Returns 1 indicating need to re-run handle_flags().
2843 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
2845 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
2851 * setup_dell_poweredge_oem_data_handler
2852 * @info - smi_info.device_id must be populated
2854 * Systems that match, but have firmware version < 1.40 may assert
2855 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2856 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2857 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2858 * as RECEIVE_MSG_AVAIL instead.
2860 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2861 * assert the OEM[012] bits, and if it did, the driver would have to
2862 * change to handle that properly, we don't actually check for the
2864 * Device ID = 0x20 BMC on PowerEdge 8G servers
2865 * Device Revision = 0x80
2866 * Firmware Revision1 = 0x01 BMC version 1.40
2867 * Firmware Revision2 = 0x40 BCD encoded
2868 * IPMI Version = 0x51 IPMI 1.5
2869 * Manufacturer ID = A2 02 00 Dell IANA
2871 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2872 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2875 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2876 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2877 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2878 #define DELL_IANA_MFR_ID 0x0002a2
2879 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
2881 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2882 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
2883 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
2884 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
2885 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
2886 smi_info
->oem_data_avail_handler
=
2887 oem_data_avail_to_receive_msg_avail
;
2888 } else if (ipmi_version_major(id
) < 1 ||
2889 (ipmi_version_major(id
) == 1 &&
2890 ipmi_version_minor(id
) < 5)) {
2891 smi_info
->oem_data_avail_handler
=
2892 oem_data_avail_to_receive_msg_avail
;
2897 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2898 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
2900 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
2902 /* Make it a reponse */
2903 msg
->rsp
[0] = msg
->data
[0] | 4;
2904 msg
->rsp
[1] = msg
->data
[1];
2905 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
2907 smi_info
->curr_msg
= NULL
;
2908 deliver_recv_msg(smi_info
, msg
);
2912 * dell_poweredge_bt_xaction_handler
2913 * @info - smi_info.device_id must be populated
2915 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2916 * not respond to a Get SDR command if the length of the data
2917 * requested is exactly 0x3A, which leads to command timeouts and no
2918 * data returned. This intercepts such commands, and causes userspace
2919 * callers to try again with a different-sized buffer, which succeeds.
2922 #define STORAGE_NETFN 0x0A
2923 #define STORAGE_CMD_GET_SDR 0x23
2924 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
2925 unsigned long unused
,
2928 struct smi_info
*smi_info
= in
;
2929 unsigned char *data
= smi_info
->curr_msg
->data
;
2930 unsigned int size
= smi_info
->curr_msg
->data_size
;
2932 (data
[0]>>2) == STORAGE_NETFN
&&
2933 data
[1] == STORAGE_CMD_GET_SDR
&&
2935 return_hosed_msg_badsize(smi_info
);
2941 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
2942 .notifier_call
= dell_poweredge_bt_xaction_handler
,
2946 * setup_dell_poweredge_bt_xaction_handler
2947 * @info - smi_info.device_id must be filled in already
2949 * Fills in smi_info.device_id.start_transaction_pre_hook
2950 * when we know what function to use there.
2953 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
2955 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2956 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
2957 smi_info
->si_type
== SI_BT
)
2958 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
2962 * setup_oem_data_handler
2963 * @info - smi_info.device_id must be filled in already
2965 * Fills in smi_info.device_id.oem_data_available_handler
2966 * when we know what function to use there.
2969 static void setup_oem_data_handler(struct smi_info
*smi_info
)
2971 setup_dell_poweredge_oem_data_handler(smi_info
);
2974 static void setup_xaction_handlers(struct smi_info
*smi_info
)
2976 setup_dell_poweredge_bt_xaction_handler(smi_info
);
2979 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
2981 if (smi_info
->intf
) {
2983 * The timer and thread are only running if the
2984 * interface has been started up and registered.
2986 if (smi_info
->thread
!= NULL
)
2987 kthread_stop(smi_info
->thread
);
2988 del_timer_sync(&smi_info
->si_timer
);
2992 static __devinitdata
struct ipmi_default_vals
2998 { .type
= SI_KCS
, .port
= 0xca2 },
2999 { .type
= SI_SMIC
, .port
= 0xca9 },
3000 { .type
= SI_BT
, .port
= 0xe4 },
3004 static __devinit
void default_find_bmc(void)
3006 struct smi_info
*info
;
3009 for (i
= 0; ; i
++) {
3010 if (!ipmi_defaults
[i
].port
)
3013 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3016 info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
3020 info
->addr_source
= SI_DEFAULT
;
3022 info
->si_type
= ipmi_defaults
[i
].type
;
3023 info
->io_setup
= port_setup
;
3024 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3025 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3027 info
->io
.addr
= NULL
;
3028 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3029 info
->io
.regsize
= DEFAULT_REGSPACING
;
3030 info
->io
.regshift
= 0;
3032 if (add_smi(info
) == 0) {
3033 if ((try_smi_init(info
)) == 0) {
3035 printk(KERN_INFO PFX
"Found default %s"
3036 " state machine at %s address 0x%lx\n",
3037 si_to_str
[info
->si_type
],
3038 addr_space_to_str
[info
->io
.addr_type
],
3039 info
->io
.addr_data
);
3041 cleanup_one_si(info
);
3048 static int is_new_interface(struct smi_info
*info
)
3052 list_for_each_entry(e
, &smi_infos
, link
) {
3053 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3055 if (e
->io
.addr_data
== info
->io
.addr_data
)
3062 static int add_smi(struct smi_info
*new_smi
)
3066 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3067 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3068 si_to_str
[new_smi
->si_type
]);
3069 mutex_lock(&smi_infos_lock
);
3070 if (!is_new_interface(new_smi
)) {
3071 printk(KERN_CONT
" duplicate interface\n");
3076 printk(KERN_CONT
"\n");
3078 /* So we know not to free it unless we have allocated one. */
3079 new_smi
->intf
= NULL
;
3080 new_smi
->si_sm
= NULL
;
3081 new_smi
->handlers
= NULL
;
3083 list_add_tail(&new_smi
->link
, &smi_infos
);
3086 mutex_unlock(&smi_infos_lock
);
3090 static int try_smi_init(struct smi_info
*new_smi
)
3095 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3096 " machine at %s address 0x%lx, slave address 0x%x,"
3098 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3099 si_to_str
[new_smi
->si_type
],
3100 addr_space_to_str
[new_smi
->io
.addr_type
],
3101 new_smi
->io
.addr_data
,
3102 new_smi
->slave_addr
, new_smi
->irq
);
3104 switch (new_smi
->si_type
) {
3106 new_smi
->handlers
= &kcs_smi_handlers
;
3110 new_smi
->handlers
= &smic_smi_handlers
;
3114 new_smi
->handlers
= &bt_smi_handlers
;
3118 /* No support for anything else yet. */
3123 /* Allocate the state machine's data and initialize it. */
3124 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3125 if (!new_smi
->si_sm
) {
3127 "Could not allocate state machine memory\n");
3131 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3134 /* Now that we know the I/O size, we can set up the I/O. */
3135 rv
= new_smi
->io_setup(new_smi
);
3137 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3141 spin_lock_init(&(new_smi
->si_lock
));
3142 spin_lock_init(&(new_smi
->msg_lock
));
3144 /* Do low-level detection first. */
3145 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3146 if (new_smi
->addr_source
)
3147 printk(KERN_INFO PFX
"Interface detection failed\n");
3153 * Attempt a get device id command. If it fails, we probably
3154 * don't have a BMC here.
3156 rv
= try_get_dev_id(new_smi
);
3158 if (new_smi
->addr_source
)
3159 printk(KERN_INFO PFX
"There appears to be no BMC"
3160 " at this location\n");
3164 setup_oem_data_handler(new_smi
);
3165 setup_xaction_handlers(new_smi
);
3167 INIT_LIST_HEAD(&(new_smi
->xmit_msgs
));
3168 INIT_LIST_HEAD(&(new_smi
->hp_xmit_msgs
));
3169 new_smi
->curr_msg
= NULL
;
3170 atomic_set(&new_smi
->req_events
, 0);
3171 new_smi
->run_to_completion
= 0;
3172 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3173 atomic_set(&new_smi
->stats
[i
], 0);
3175 new_smi
->interrupt_disabled
= 1;
3176 atomic_set(&new_smi
->stop_operation
, 0);
3177 new_smi
->intf_num
= smi_num
;
3180 rv
= try_enable_event_buffer(new_smi
);
3182 new_smi
->has_event_buffer
= 1;
3185 * Start clearing the flags before we enable interrupts or the
3186 * timer to avoid racing with the timer.
3188 start_clear_flags(new_smi
);
3189 /* IRQ is defined to be set when non-zero. */
3191 new_smi
->si_state
= SI_CLEARING_FLAGS_THEN_SET_IRQ
;
3193 if (!new_smi
->dev
) {
3195 * If we don't already have a device from something
3196 * else (like PCI), then register a new one.
3198 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3200 if (!new_smi
->pdev
) {
3202 "Unable to allocate platform device\n");
3205 new_smi
->dev
= &new_smi
->pdev
->dev
;
3206 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3208 rv
= platform_device_add(new_smi
->pdev
);
3211 "Unable to register system interface device:"
3216 new_smi
->dev_registered
= 1;
3219 rv
= ipmi_register_smi(&handlers
,
3221 &new_smi
->device_id
,
3224 new_smi
->slave_addr
);
3226 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3228 goto out_err_stop_timer
;
3231 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3232 type_file_read_proc
,
3235 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3236 goto out_err_stop_timer
;
3239 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3240 stat_file_read_proc
,
3243 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3244 goto out_err_stop_timer
;
3247 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3251 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3252 goto out_err_stop_timer
;
3255 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3256 si_to_str
[new_smi
->si_type
]);
3261 atomic_inc(&new_smi
->stop_operation
);
3262 wait_for_timer_and_thread(new_smi
);
3265 new_smi
->interrupt_disabled
= 1;
3267 if (new_smi
->intf
) {
3268 ipmi_unregister_smi(new_smi
->intf
);
3269 new_smi
->intf
= NULL
;
3272 if (new_smi
->irq_cleanup
) {
3273 new_smi
->irq_cleanup(new_smi
);
3274 new_smi
->irq_cleanup
= NULL
;
3278 * Wait until we know that we are out of any interrupt
3279 * handlers might have been running before we freed the
3282 synchronize_sched();
3284 if (new_smi
->si_sm
) {
3285 if (new_smi
->handlers
)
3286 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3287 kfree(new_smi
->si_sm
);
3288 new_smi
->si_sm
= NULL
;
3290 if (new_smi
->addr_source_cleanup
) {
3291 new_smi
->addr_source_cleanup(new_smi
);
3292 new_smi
->addr_source_cleanup
= NULL
;
3294 if (new_smi
->io_cleanup
) {
3295 new_smi
->io_cleanup(new_smi
);
3296 new_smi
->io_cleanup
= NULL
;
3299 if (new_smi
->dev_registered
) {
3300 platform_device_unregister(new_smi
->pdev
);
3301 new_smi
->dev_registered
= 0;
3307 static __devinit
int init_ipmi_si(void)
3313 enum ipmi_addr_src type
= SI_INVALID
;
3319 /* Register the device drivers. */
3320 rv
= driver_register(&ipmi_driver
.driver
);
3322 printk(KERN_ERR PFX
"Unable to register driver: %d\n", rv
);
3327 /* Parse out the si_type string into its components. */
3330 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3332 str
= strchr(str
, ',');
3342 printk(KERN_INFO
"IPMI System Interface driver.\n");
3344 hardcode_find_bmc();
3346 /* If the user gave us a device, they presumably want us to use it */
3347 mutex_lock(&smi_infos_lock
);
3348 if (!list_empty(&smi_infos
)) {
3349 mutex_unlock(&smi_infos_lock
);
3352 mutex_unlock(&smi_infos_lock
);
3355 rv
= pci_register_driver(&ipmi_pci_driver
);
3357 printk(KERN_ERR PFX
"Unable to register PCI driver: %d\n", rv
);
3363 pnp_register_driver(&ipmi_pnp_driver
);
3375 #ifdef CONFIG_PPC_OF
3376 of_register_platform_driver(&ipmi_of_platform_driver
);
3380 /* We prefer devices with interrupts, but in the case of a machine
3381 with multiple BMCs we assume that there will be several instances
3382 of a given type so if we succeed in registering a type then also
3383 try to register everything else of the same type */
3385 mutex_lock(&smi_infos_lock
);
3386 list_for_each_entry(e
, &smi_infos
, link
) {
3387 /* Try to register a device if it has an IRQ and we either
3388 haven't successfully registered a device yet or this
3389 device has the same type as one we successfully registered */
3390 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3391 if (!try_smi_init(e
)) {
3392 type
= e
->addr_source
;
3397 /* type will only have been set if we successfully registered an si */
3399 mutex_unlock(&smi_infos_lock
);
3403 /* Fall back to the preferred device */
3405 list_for_each_entry(e
, &smi_infos
, link
) {
3406 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3407 if (!try_smi_init(e
)) {
3408 type
= e
->addr_source
;
3412 mutex_unlock(&smi_infos_lock
);
3417 if (si_trydefaults
) {
3418 mutex_lock(&smi_infos_lock
);
3419 if (list_empty(&smi_infos
)) {
3420 /* No BMC was found, try defaults. */
3421 mutex_unlock(&smi_infos_lock
);
3424 mutex_unlock(&smi_infos_lock
);
3427 mutex_lock(&smi_infos_lock
);
3428 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3429 mutex_unlock(&smi_infos_lock
);
3432 pci_unregister_driver(&ipmi_pci_driver
);
3435 #ifdef CONFIG_PPC_OF
3437 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3439 driver_unregister(&ipmi_driver
.driver
);
3440 printk(KERN_WARNING PFX
3441 "Unable to find any System Interface(s)\n");
3444 mutex_unlock(&smi_infos_lock
);
3448 module_init(init_ipmi_si
);
3450 static void cleanup_one_si(struct smi_info
*to_clean
)
3453 unsigned long flags
;
3458 list_del(&to_clean
->link
);
3460 /* Tell the driver that we are shutting down. */
3461 atomic_inc(&to_clean
->stop_operation
);
3464 * Make sure the timer and thread are stopped and will not run
3467 wait_for_timer_and_thread(to_clean
);
3470 * Timeouts are stopped, now make sure the interrupts are off
3471 * for the device. A little tricky with locks to make sure
3472 * there are no races.
3474 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3475 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3476 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3478 schedule_timeout_uninterruptible(1);
3479 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3481 disable_si_irq(to_clean
);
3482 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3483 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3485 schedule_timeout_uninterruptible(1);
3488 /* Clean up interrupts and make sure that everything is done. */
3489 if (to_clean
->irq_cleanup
)
3490 to_clean
->irq_cleanup(to_clean
);
3491 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3493 schedule_timeout_uninterruptible(1);
3497 rv
= ipmi_unregister_smi(to_clean
->intf
);
3500 printk(KERN_ERR PFX
"Unable to unregister device: errno=%d\n",
3504 if (to_clean
->handlers
)
3505 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3507 kfree(to_clean
->si_sm
);
3509 if (to_clean
->addr_source_cleanup
)
3510 to_clean
->addr_source_cleanup(to_clean
);
3511 if (to_clean
->io_cleanup
)
3512 to_clean
->io_cleanup(to_clean
);
3514 if (to_clean
->dev_registered
)
3515 platform_device_unregister(to_clean
->pdev
);
3520 static __exit
void cleanup_ipmi_si(void)
3522 struct smi_info
*e
, *tmp_e
;
3529 pci_unregister_driver(&ipmi_pci_driver
);
3533 pnp_unregister_driver(&ipmi_pnp_driver
);
3536 #ifdef CONFIG_PPC_OF
3538 of_unregister_platform_driver(&ipmi_of_platform_driver
);
3541 mutex_lock(&smi_infos_lock
);
3542 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3544 mutex_unlock(&smi_infos_lock
);
3546 driver_unregister(&ipmi_driver
.driver
);
3548 module_exit(cleanup_ipmi_si
);
3550 MODULE_LICENSE("GPL");
3551 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3552 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3553 " system interfaces.");