4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <asm/system.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/errno.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/list.h>
52 #include <linux/pci.h>
53 #include <linux/ioport.h>
54 #include <linux/notifier.h>
55 #include <linux/mutex.h>
56 #include <linux/kthread.h>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi_smi.h>
62 #include "ipmi_si_sm.h"
63 #include <linux/init.h>
64 #include <linux/dmi.h>
65 #include <linux/string.h>
66 #include <linux/ctype.h>
67 #include <linux/pnp.h>
70 #include <linux/of_device.h>
71 #include <linux/of_platform.h>
74 #define PFX "ipmi_si: "
76 /* Measure times between events in the driver. */
79 /* Call every 10 ms. */
80 #define SI_TIMEOUT_TIME_USEC 10000
81 #define SI_USEC_PER_JIFFY (1000000/HZ)
82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
91 SI_CLEARING_FLAGS_THEN_SET_IRQ,
93 SI_ENABLE_INTERRUPTS1,
94 SI_ENABLE_INTERRUPTS2,
95 SI_DISABLE_INTERRUPTS1,
96 SI_DISABLE_INTERRUPTS2
97 /* FIXME - add watchdog stuff. */
100 /* Some BT-specific defines we need here. */
101 #define IPMI_BT_INTMASK_REG 2
102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106 SI_KCS, SI_SMIC, SI_BT
108 static char *si_to_str[] = { "kcs", "smic", "bt" };
111 SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS,
112 SI_PCI, SI_DEVICETREE, SI_DEFAULT
114 static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
115 "ACPI", "SMBIOS", "PCI",
116 "device-tree", "default" };
118 #define DEVICE_NAME "ipmi_si"
120 static struct platform_driver ipmi_driver = {
123 .bus = &platform_bus_type
129 * Indexes into stats[] in smi_info below.
131 enum si_stat_indexes {
133 * Number of times the driver requested a timer while an operation
136 SI_STAT_short_timeouts = 0,
139 * Number of times the driver requested a timer while nothing was in
142 SI_STAT_long_timeouts,
144 /* Number of times the interface was idle while being polled. */
147 /* Number of interrupts the driver handled. */
150 /* Number of time the driver got an ATTN from the hardware. */
153 /* Number of times the driver requested flags from the hardware. */
154 SI_STAT_flag_fetches,
156 /* Number of times the hardware didn't follow the state machine. */
159 /* Number of completed messages. */
160 SI_STAT_complete_transactions,
162 /* Number of IPMI events received from the hardware. */
165 /* Number of watchdog pretimeouts. */
166 SI_STAT_watchdog_pretimeouts,
168 /* Number of asyncronous messages received. */
169 SI_STAT_incoming_messages,
172 /* This *must* remain last, add new values above this. */
179 struct si_sm_data *si_sm;
180 struct si_sm_handlers *handlers;
181 enum si_type si_type;
184 struct list_head xmit_msgs;
185 struct list_head hp_xmit_msgs;
186 struct ipmi_smi_msg *curr_msg;
187 enum si_intf_state si_state;
190 * Used to handle the various types of I/O that can occur with
194 int (*io_setup)(struct smi_info *info);
195 void (*io_cleanup)(struct smi_info *info);
196 int (*irq_setup)(struct smi_info *info);
197 void (*irq_cleanup)(struct smi_info *info);
198 unsigned int io_size;
199 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
200 void (*addr_source_cleanup)(struct smi_info *info);
201 void *addr_source_data;
204 * Per-OEM handler, called from handle_flags(). Returns 1
205 * when handle_flags() needs to be re-run or 0 indicating it
206 * set si_state itself.
208 int (*oem_data_avail_handler)(struct smi_info *smi_info);
211 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
212 * is set to hold the flags until we are done handling everything
215 #define RECEIVE_MSG_AVAIL 0x01
216 #define EVENT_MSG_BUFFER_FULL 0x02
217 #define WDT_PRE_TIMEOUT_INT 0x08
218 #define OEM0_DATA_AVAIL 0x20
219 #define OEM1_DATA_AVAIL 0x40
220 #define OEM2_DATA_AVAIL 0x80
221 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
224 unsigned char msg_flags;
226 /* Does the BMC have an event buffer? */
227 char has_event_buffer;
230 * If set to true, this will request events the next time the
231 * state machine is idle.
236 * If true, run the state machine to completion on every send
237 * call. Generally used after a panic to make sure stuff goes
240 int run_to_completion;
242 /* The I/O port of an SI interface. */
246 * The space between start addresses of the two ports. For
247 * instance, if the first port is 0xca2 and the spacing is 4, then
248 * the second port is 0xca6.
250 unsigned int spacing;
252 /* zero if no irq; */
255 /* The timer for this si. */
256 struct timer_list si_timer;
258 /* The time (in jiffies) the last timeout occurred at. */
259 unsigned long last_timeout_jiffies;
261 /* Used to gracefully stop the timer without race conditions. */
262 atomic_t stop_operation;
265 * The driver will disable interrupts when it gets into a
266 * situation where it cannot handle messages due to lack of
267 * memory. Once that situation clears up, it will re-enable
270 int interrupt_disabled;
272 /* From the get device id response... */
273 struct ipmi_device_id device_id;
275 /* Driver model stuff. */
277 struct platform_device *pdev;
280 * True if we allocated the device, false if it came from
281 * someplace else (like PCI).
285 /* Slave address, could be reported from DMI. */
286 unsigned char slave_addr;
288 /* Counters and things for the proc filesystem. */
289 atomic_t stats[SI_NUM_STATS];
291 struct task_struct *thread;
293 struct list_head link;
296 #define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298 #define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
301 #define SI_MAX_PARMS 4
303 static int force_kipmid[SI_MAX_PARMS];
304 static int num_force_kipmid;
306 static int pci_registered;
309 static int of_registered;
312 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
313 static int num_max_busy_us;
315 static int unload_when_empty = 1;
317 static int add_smi(struct smi_info *smi);
318 static int try_smi_init(struct smi_info *smi);
319 static void cleanup_one_si(struct smi_info *to_clean);
321 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
322 static int register_xaction_notifier(struct notifier_block *nb)
324 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
327 static void deliver_recv_msg(struct smi_info *smi_info,
328 struct ipmi_smi_msg *msg)
330 /* Deliver the message to the upper layer with the lock
333 if (smi_info->run_to_completion) {
334 ipmi_smi_msg_received(smi_info->intf, msg);
336 spin_unlock(&(smi_info->si_lock));
337 ipmi_smi_msg_received(smi_info->intf, msg);
338 spin_lock(&(smi_info->si_lock));
342 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
344 struct ipmi_smi_msg *msg = smi_info->curr_msg;
346 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
347 cCode = IPMI_ERR_UNSPECIFIED;
348 /* else use it as is */
350 /* Make it a reponse */
351 msg->rsp[0] = msg->data[0] | 4;
352 msg->rsp[1] = msg->data[1];
356 smi_info->curr_msg = NULL;
357 deliver_recv_msg(smi_info, msg);
360 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
363 struct list_head *entry = NULL;
369 * No need to save flags, we aleady have interrupts off and we
370 * already hold the SMI lock.
372 if (!smi_info->run_to_completion)
373 spin_lock(&(smi_info->msg_lock));
375 /* Pick the high priority queue first. */
376 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
377 entry = smi_info->hp_xmit_msgs.next;
378 } else if (!list_empty(&(smi_info->xmit_msgs))) {
379 entry = smi_info->xmit_msgs.next;
383 smi_info->curr_msg = NULL;
389 smi_info->curr_msg = list_entry(entry,
394 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
396 err = atomic_notifier_call_chain(&xaction_notifier_list,
398 if (err & NOTIFY_STOP_MASK) {
399 rv = SI_SM_CALL_WITHOUT_DELAY;
402 err = smi_info->handlers->start_transaction(
404 smi_info->curr_msg->data,
405 smi_info->curr_msg->data_size);
407 return_hosed_msg(smi_info, err);
409 rv = SI_SM_CALL_WITHOUT_DELAY;
412 if (!smi_info->run_to_completion)
413 spin_unlock(&(smi_info->msg_lock));
418 static void start_enable_irq(struct smi_info *smi_info)
420 unsigned char msg[2];
423 * If we are enabling interrupts, we have to tell the
426 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
427 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
429 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
430 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
433 static void start_disable_irq(struct smi_info *smi_info)
435 unsigned char msg[2];
437 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
438 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
440 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
441 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
444 static void start_clear_flags(struct smi_info *smi_info)
446 unsigned char msg[3];
448 /* Make sure the watchdog pre-timeout flag is not set at startup. */
449 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
450 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
451 msg[2] = WDT_PRE_TIMEOUT_INT;
453 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
454 smi_info->si_state = SI_CLEARING_FLAGS;
458 * When we have a situtaion where we run out of memory and cannot
459 * allocate messages, we just leave them in the BMC and run the system
460 * polled until we can allocate some memory. Once we have some
461 * memory, we will re-enable the interrupt.
463 static inline void disable_si_irq(struct smi_info *smi_info)
465 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
466 start_disable_irq(smi_info);
467 smi_info->interrupt_disabled = 1;
468 if (!atomic_read(&smi_info->stop_operation))
469 mod_timer(&smi_info->si_timer,
470 jiffies + SI_TIMEOUT_JIFFIES);
474 static inline void enable_si_irq(struct smi_info *smi_info)
476 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
477 start_enable_irq(smi_info);
478 smi_info->interrupt_disabled = 0;
482 static void handle_flags(struct smi_info *smi_info)
485 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
486 /* Watchdog pre-timeout */
487 smi_inc_stat(smi_info, watchdog_pretimeouts);
489 start_clear_flags(smi_info);
490 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
491 spin_unlock(&(smi_info->si_lock));
492 ipmi_smi_watchdog_pretimeout(smi_info->intf);
493 spin_lock(&(smi_info->si_lock));
494 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
495 /* Messages available. */
496 smi_info->curr_msg = ipmi_alloc_smi_msg();
497 if (!smi_info->curr_msg) {
498 disable_si_irq(smi_info);
499 smi_info->si_state = SI_NORMAL;
502 enable_si_irq(smi_info);
504 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
505 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
506 smi_info->curr_msg->data_size = 2;
508 smi_info->handlers->start_transaction(
510 smi_info->curr_msg->data,
511 smi_info->curr_msg->data_size);
512 smi_info->si_state = SI_GETTING_MESSAGES;
513 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
514 /* Events available. */
515 smi_info->curr_msg = ipmi_alloc_smi_msg();
516 if (!smi_info->curr_msg) {
517 disable_si_irq(smi_info);
518 smi_info->si_state = SI_NORMAL;
521 enable_si_irq(smi_info);
523 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
524 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
525 smi_info->curr_msg->data_size = 2;
527 smi_info->handlers->start_transaction(
529 smi_info->curr_msg->data,
530 smi_info->curr_msg->data_size);
531 smi_info->si_state = SI_GETTING_EVENTS;
532 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
533 smi_info->oem_data_avail_handler) {
534 if (smi_info->oem_data_avail_handler(smi_info))
537 smi_info->si_state = SI_NORMAL;
540 static void handle_transaction_done(struct smi_info *smi_info)
542 struct ipmi_smi_msg *msg;
547 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
549 switch (smi_info->si_state) {
551 if (!smi_info->curr_msg)
554 smi_info->curr_msg->rsp_size
555 = smi_info->handlers->get_result(
557 smi_info->curr_msg->rsp,
558 IPMI_MAX_MSG_LENGTH);
561 * Do this here becase deliver_recv_msg() releases the
562 * lock, and a new message can be put in during the
563 * time the lock is released.
565 msg = smi_info->curr_msg;
566 smi_info->curr_msg = NULL;
567 deliver_recv_msg(smi_info, msg);
570 case SI_GETTING_FLAGS:
572 unsigned char msg[4];
575 /* We got the flags from the SMI, now handle them. */
576 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
578 /* Error fetching flags, just give up for now. */
579 smi_info->si_state = SI_NORMAL;
580 } else if (len < 4) {
582 * Hmm, no flags. That's technically illegal, but
583 * don't use uninitialized data.
585 smi_info->si_state = SI_NORMAL;
587 smi_info->msg_flags = msg[3];
588 handle_flags(smi_info);
593 case SI_CLEARING_FLAGS:
594 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
596 unsigned char msg[3];
598 /* We cleared the flags. */
599 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
601 /* Error clearing flags */
602 dev_warn(smi_info->dev,
603 "Error clearing flags: %2.2x\n", msg[2]);
605 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
606 start_enable_irq(smi_info);
608 smi_info->si_state = SI_NORMAL;
612 case SI_GETTING_EVENTS:
614 smi_info->curr_msg->rsp_size
615 = smi_info->handlers->get_result(
617 smi_info->curr_msg->rsp,
618 IPMI_MAX_MSG_LENGTH);
621 * Do this here becase deliver_recv_msg() releases the
622 * lock, and a new message can be put in during the
623 * time the lock is released.
625 msg = smi_info->curr_msg;
626 smi_info->curr_msg = NULL;
627 if (msg->rsp[2] != 0) {
628 /* Error getting event, probably done. */
631 /* Take off the event flag. */
632 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
633 handle_flags(smi_info);
635 smi_inc_stat(smi_info, events);
638 * Do this before we deliver the message
639 * because delivering the message releases the
640 * lock and something else can mess with the
643 handle_flags(smi_info);
645 deliver_recv_msg(smi_info, msg);
650 case SI_GETTING_MESSAGES:
652 smi_info->curr_msg->rsp_size
653 = smi_info->handlers->get_result(
655 smi_info->curr_msg->rsp,
656 IPMI_MAX_MSG_LENGTH);
659 * Do this here becase deliver_recv_msg() releases the
660 * lock, and a new message can be put in during the
661 * time the lock is released.
663 msg = smi_info->curr_msg;
664 smi_info->curr_msg = NULL;
665 if (msg->rsp[2] != 0) {
666 /* Error getting event, probably done. */
669 /* Take off the msg flag. */
670 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
671 handle_flags(smi_info);
673 smi_inc_stat(smi_info, incoming_messages);
676 * Do this before we deliver the message
677 * because delivering the message releases the
678 * lock and something else can mess with the
681 handle_flags(smi_info);
683 deliver_recv_msg(smi_info, msg);
688 case SI_ENABLE_INTERRUPTS1:
690 unsigned char msg[4];
692 /* We got the flags from the SMI, now handle them. */
693 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
695 dev_warn(smi_info->dev, "Could not enable interrupts"
696 ", failed get, using polled mode.\n");
697 smi_info->si_state = SI_NORMAL;
699 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
700 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
702 IPMI_BMC_RCV_MSG_INTR |
703 IPMI_BMC_EVT_MSG_INTR);
704 smi_info->handlers->start_transaction(
705 smi_info->si_sm, msg, 3);
706 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
711 case SI_ENABLE_INTERRUPTS2:
713 unsigned char msg[4];
715 /* We got the flags from the SMI, now handle them. */
716 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
718 dev_warn(smi_info->dev, "Could not enable interrupts"
719 ", failed set, using polled mode.\n");
721 smi_info->interrupt_disabled = 0;
722 smi_info->si_state = SI_NORMAL;
726 case SI_DISABLE_INTERRUPTS1:
728 unsigned char msg[4];
730 /* We got the flags from the SMI, now handle them. */
731 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
733 dev_warn(smi_info->dev, "Could not disable interrupts"
735 smi_info->si_state = SI_NORMAL;
737 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
738 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
740 ~(IPMI_BMC_RCV_MSG_INTR |
741 IPMI_BMC_EVT_MSG_INTR));
742 smi_info->handlers->start_transaction(
743 smi_info->si_sm, msg, 3);
744 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
749 case SI_DISABLE_INTERRUPTS2:
751 unsigned char msg[4];
753 /* We got the flags from the SMI, now handle them. */
754 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
756 dev_warn(smi_info->dev, "Could not disable interrupts"
759 smi_info->si_state = SI_NORMAL;
766 * Called on timeouts and events. Timeouts should pass the elapsed
767 * time, interrupts should pass in zero. Must be called with
768 * si_lock held and interrupts disabled.
770 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
773 enum si_sm_result si_sm_result;
777 * There used to be a loop here that waited a little while
778 * (around 25us) before giving up. That turned out to be
779 * pointless, the minimum delays I was seeing were in the 300us
780 * range, which is far too long to wait in an interrupt. So
781 * we just run until the state machine tells us something
782 * happened or it needs a delay.
784 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
786 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
787 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
789 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
790 smi_inc_stat(smi_info, complete_transactions);
792 handle_transaction_done(smi_info);
793 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
794 } else if (si_sm_result == SI_SM_HOSED) {
795 smi_inc_stat(smi_info, hosed_count);
798 * Do the before return_hosed_msg, because that
801 smi_info->si_state = SI_NORMAL;
802 if (smi_info->curr_msg != NULL) {
804 * If we were handling a user message, format
805 * a response to send to the upper layer to
806 * tell it about the error.
808 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
810 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
814 * We prefer handling attn over new messages. But don't do
815 * this if there is not yet an upper layer to handle anything.
817 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
818 unsigned char msg[2];
820 smi_inc_stat(smi_info, attentions);
823 * Got a attn, send down a get message flags to see
824 * what's causing it. It would be better to handle
825 * this in the upper layer, but due to the way
826 * interrupts work with the SMI, that's not really
829 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
830 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
832 smi_info->handlers->start_transaction(
833 smi_info->si_sm, msg, 2);
834 smi_info->si_state = SI_GETTING_FLAGS;
838 /* If we are currently idle, try to start the next message. */
839 if (si_sm_result == SI_SM_IDLE) {
840 smi_inc_stat(smi_info, idles);
842 si_sm_result = start_next_msg(smi_info);
843 if (si_sm_result != SI_SM_IDLE)
847 if ((si_sm_result == SI_SM_IDLE)
848 && (atomic_read(&smi_info->req_events))) {
850 * We are idle and the upper layer requested that I fetch
853 atomic_set(&smi_info->req_events, 0);
855 smi_info->curr_msg = ipmi_alloc_smi_msg();
856 if (!smi_info->curr_msg)
859 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
860 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
861 smi_info->curr_msg->data_size = 2;
863 smi_info->handlers->start_transaction(
865 smi_info->curr_msg->data,
866 smi_info->curr_msg->data_size);
867 smi_info->si_state = SI_GETTING_EVENTS;
874 static void sender(void *send_info,
875 struct ipmi_smi_msg *msg,
878 struct smi_info *smi_info = send_info;
879 enum si_sm_result result;
885 if (atomic_read(&smi_info->stop_operation)) {
886 msg->rsp[0] = msg->data[0] | 4;
887 msg->rsp[1] = msg->data[1];
888 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
890 deliver_recv_msg(smi_info, msg);
896 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
899 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
901 if (smi_info->thread)
902 wake_up_process(smi_info->thread);
904 if (smi_info->run_to_completion) {
906 * If we are running to completion, then throw it in
907 * the list and run transactions until everything is
908 * clear. Priority doesn't matter here.
912 * Run to completion means we are single-threaded, no
915 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
917 result = smi_event_handler(smi_info, 0);
918 while (result != SI_SM_IDLE) {
919 udelay(SI_SHORT_TIMEOUT_USEC);
920 result = smi_event_handler(smi_info,
921 SI_SHORT_TIMEOUT_USEC);
926 spin_lock_irqsave(&smi_info->msg_lock, flags);
928 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
930 list_add_tail(&msg->link, &smi_info->xmit_msgs);
931 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
933 spin_lock_irqsave(&smi_info->si_lock, flags);
934 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
935 start_next_msg(smi_info);
936 spin_unlock_irqrestore(&smi_info->si_lock, flags);
939 static void set_run_to_completion(void *send_info, int i_run_to_completion)
941 struct smi_info *smi_info = send_info;
942 enum si_sm_result result;
944 smi_info->run_to_completion = i_run_to_completion;
945 if (i_run_to_completion) {
946 result = smi_event_handler(smi_info, 0);
947 while (result != SI_SM_IDLE) {
948 udelay(SI_SHORT_TIMEOUT_USEC);
949 result = smi_event_handler(smi_info,
950 SI_SHORT_TIMEOUT_USEC);
956 * Use -1 in the nsec value of the busy waiting timespec to tell that
957 * we are spinning in kipmid looking for something and not delaying
960 static inline void ipmi_si_set_not_busy(struct timespec *ts)
964 static inline int ipmi_si_is_busy(struct timespec *ts)
966 return ts->tv_nsec != -1;
969 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
970 const struct smi_info *smi_info,
971 struct timespec *busy_until)
973 unsigned int max_busy_us = 0;
975 if (smi_info->intf_num < num_max_busy_us)
976 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
977 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
978 ipmi_si_set_not_busy(busy_until);
979 else if (!ipmi_si_is_busy(busy_until)) {
980 getnstimeofday(busy_until);
981 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
984 getnstimeofday(&now);
985 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
986 ipmi_si_set_not_busy(busy_until);
995 * A busy-waiting loop for speeding up IPMI operation.
997 * Lousy hardware makes this hard. This is only enabled for systems
998 * that are not BT and do not have interrupts. It starts spinning
999 * when an operation is complete or until max_busy tells it to stop
1000 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1001 * Documentation/IPMI.txt for details.
1003 static int ipmi_thread(void *data)
1005 struct smi_info *smi_info = data;
1006 unsigned long flags;
1007 enum si_sm_result smi_result;
1008 struct timespec busy_until;
1010 ipmi_si_set_not_busy(&busy_until);
1011 set_user_nice(current, 19);
1012 while (!kthread_should_stop()) {
1015 spin_lock_irqsave(&(smi_info->si_lock), flags);
1016 smi_result = smi_event_handler(smi_info, 0);
1017 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1018 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1020 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1022 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1024 else if (smi_result == SI_SM_IDLE)
1025 schedule_timeout_interruptible(100);
1027 schedule_timeout_interruptible(1);
1033 static void poll(void *send_info)
1035 struct smi_info *smi_info = send_info;
1036 unsigned long flags;
1039 * Make sure there is some delay in the poll loop so we can
1040 * drive time forward and timeout things.
1043 spin_lock_irqsave(&smi_info->si_lock, flags);
1044 smi_event_handler(smi_info, 10);
1045 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1048 static void request_events(void *send_info)
1050 struct smi_info *smi_info = send_info;
1052 if (atomic_read(&smi_info->stop_operation) ||
1053 !smi_info->has_event_buffer)
1056 atomic_set(&smi_info->req_events, 1);
1059 static int initialized;
1061 static void smi_timeout(unsigned long data)
1063 struct smi_info *smi_info = (struct smi_info *) data;
1064 enum si_sm_result smi_result;
1065 unsigned long flags;
1066 unsigned long jiffies_now;
1073 spin_lock_irqsave(&(smi_info->si_lock), flags);
1075 do_gettimeofday(&t);
1076 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1078 jiffies_now = jiffies;
1079 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1080 * SI_USEC_PER_JIFFY);
1081 smi_result = smi_event_handler(smi_info, time_diff);
1083 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1085 smi_info->last_timeout_jiffies = jiffies_now;
1087 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1088 /* Running with interrupts, only do long timeouts. */
1089 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1090 smi_inc_stat(smi_info, long_timeouts);
1095 * If the state machine asks for a short delay, then shorten
1096 * the timer timeout.
1098 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1099 smi_inc_stat(smi_info, short_timeouts);
1100 timeout = jiffies + 1;
1102 smi_inc_stat(smi_info, long_timeouts);
1103 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1107 if (smi_result != SI_SM_IDLE)
1108 mod_timer(&(smi_info->si_timer), timeout);
1111 static irqreturn_t si_irq_handler(int irq, void *data)
1113 struct smi_info *smi_info = data;
1114 unsigned long flags;
1119 spin_lock_irqsave(&(smi_info->si_lock), flags);
1121 smi_inc_stat(smi_info, interrupts);
1124 do_gettimeofday(&t);
1125 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1127 smi_event_handler(smi_info, 0);
1128 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1132 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1134 struct smi_info *smi_info = data;
1135 /* We need to clear the IRQ flag for the BT interface. */
1136 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1137 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1138 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1139 return si_irq_handler(irq, data);
1142 static int smi_start_processing(void *send_info,
1145 struct smi_info *new_smi = send_info;
1148 new_smi->intf = intf;
1150 /* Try to claim any interrupts. */
1151 if (new_smi->irq_setup)
1152 new_smi->irq_setup(new_smi);
1154 /* Set up the timer that drives the interface. */
1155 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1156 new_smi->last_timeout_jiffies = jiffies;
1157 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1160 * Check if the user forcefully enabled the daemon.
1162 if (new_smi->intf_num < num_force_kipmid)
1163 enable = force_kipmid[new_smi->intf_num];
1165 * The BT interface is efficient enough to not need a thread,
1166 * and there is no need for a thread if we have interrupts.
1168 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1172 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1173 "kipmi%d", new_smi->intf_num);
1174 if (IS_ERR(new_smi->thread)) {
1175 dev_notice(new_smi->dev, "Could not start"
1176 " kernel thread due to error %ld, only using"
1177 " timers to drive the interface\n",
1178 PTR_ERR(new_smi->thread));
1179 new_smi->thread = NULL;
1186 static void set_maintenance_mode(void *send_info, int enable)
1188 struct smi_info *smi_info = send_info;
1191 atomic_set(&smi_info->req_events, 0);
1194 static struct ipmi_smi_handlers handlers = {
1195 .owner = THIS_MODULE,
1196 .start_processing = smi_start_processing,
1198 .request_events = request_events,
1199 .set_maintenance_mode = set_maintenance_mode,
1200 .set_run_to_completion = set_run_to_completion,
1205 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1206 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1209 static LIST_HEAD(smi_infos);
1210 static DEFINE_MUTEX(smi_infos_lock);
1211 static int smi_num; /* Used to sequence the SMIs */
1213 #define DEFAULT_REGSPACING 1
1214 #define DEFAULT_REGSIZE 1
1216 static int si_trydefaults = 1;
1217 static char *si_type[SI_MAX_PARMS];
1218 #define MAX_SI_TYPE_STR 30
1219 static char si_type_str[MAX_SI_TYPE_STR];
1220 static unsigned long addrs[SI_MAX_PARMS];
1221 static unsigned int num_addrs;
1222 static unsigned int ports[SI_MAX_PARMS];
1223 static unsigned int num_ports;
1224 static int irqs[SI_MAX_PARMS];
1225 static unsigned int num_irqs;
1226 static int regspacings[SI_MAX_PARMS];
1227 static unsigned int num_regspacings;
1228 static int regsizes[SI_MAX_PARMS];
1229 static unsigned int num_regsizes;
1230 static int regshifts[SI_MAX_PARMS];
1231 static unsigned int num_regshifts;
1232 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1233 static unsigned int num_slave_addrs;
1235 #define IPMI_IO_ADDR_SPACE 0
1236 #define IPMI_MEM_ADDR_SPACE 1
1237 static char *addr_space_to_str[] = { "i/o", "mem" };
1239 static int hotmod_handler(const char *val, struct kernel_param *kp);
1241 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1242 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1243 " Documentation/IPMI.txt in the kernel sources for the"
1246 module_param_named(trydefaults, si_trydefaults, bool, 0);
1247 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1248 " default scan of the KCS and SMIC interface at the standard"
1250 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1251 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1252 " interface separated by commas. The types are 'kcs',"
1253 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1254 " the first interface to kcs and the second to bt");
1255 module_param_array(addrs, ulong, &num_addrs, 0);
1256 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1257 " addresses separated by commas. Only use if an interface"
1258 " is in memory. Otherwise, set it to zero or leave"
1260 module_param_array(ports, uint, &num_ports, 0);
1261 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1262 " addresses separated by commas. Only use if an interface"
1263 " is a port. Otherwise, set it to zero or leave"
1265 module_param_array(irqs, int, &num_irqs, 0);
1266 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1267 " addresses separated by commas. Only use if an interface"
1268 " has an interrupt. Otherwise, set it to zero or leave"
1270 module_param_array(regspacings, int, &num_regspacings, 0);
1271 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1272 " and each successive register used by the interface. For"
1273 " instance, if the start address is 0xca2 and the spacing"
1274 " is 2, then the second address is at 0xca4. Defaults"
1276 module_param_array(regsizes, int, &num_regsizes, 0);
1277 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1278 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1279 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1280 " the 8-bit IPMI register has to be read from a larger"
1282 module_param_array(regshifts, int, &num_regshifts, 0);
1283 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1284 " IPMI register, in bits. For instance, if the data"
1285 " is read from a 32-bit word and the IPMI data is in"
1286 " bit 8-15, then the shift would be 8");
1287 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1288 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1289 " the controller. Normally this is 0x20, but can be"
1290 " overridden by this parm. This is an array indexed"
1291 " by interface number.");
1292 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1293 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1294 " disabled(0). Normally the IPMI driver auto-detects"
1295 " this, but the value may be overridden by this parm.");
1296 module_param(unload_when_empty, int, 0);
1297 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1298 " specified or found, default is 1. Setting to 0"
1299 " is useful for hot add of devices using hotmod.");
1300 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1301 MODULE_PARM_DESC(kipmid_max_busy_us,
1302 "Max time (in microseconds) to busy-wait for IPMI data before"
1303 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1304 " if kipmid is using up a lot of CPU time.");
1307 static void std_irq_cleanup(struct smi_info *info)
1309 if (info->si_type == SI_BT)
1310 /* Disable the interrupt in the BT interface. */
1311 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1312 free_irq(info->irq, info);
1315 static int std_irq_setup(struct smi_info *info)
1322 if (info->si_type == SI_BT) {
1323 rv = request_irq(info->irq,
1325 IRQF_SHARED | IRQF_DISABLED,
1329 /* Enable the interrupt in the BT interface. */
1330 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1331 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1333 rv = request_irq(info->irq,
1335 IRQF_SHARED | IRQF_DISABLED,
1339 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1340 " running polled\n",
1341 DEVICE_NAME, info->irq);
1344 info->irq_cleanup = std_irq_cleanup;
1345 dev_info(info->dev, "Using irq %d\n", info->irq);
1351 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1353 unsigned int addr = io->addr_data;
1355 return inb(addr + (offset * io->regspacing));
1358 static void port_outb(struct si_sm_io *io, unsigned int offset,
1361 unsigned int addr = io->addr_data;
1363 outb(b, addr + (offset * io->regspacing));
1366 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1368 unsigned int addr = io->addr_data;
1370 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1373 static void port_outw(struct si_sm_io *io, unsigned int offset,
1376 unsigned int addr = io->addr_data;
1378 outw(b << io->regshift, addr + (offset * io->regspacing));
1381 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1383 unsigned int addr = io->addr_data;
1385 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1388 static void port_outl(struct si_sm_io *io, unsigned int offset,
1391 unsigned int addr = io->addr_data;
1393 outl(b << io->regshift, addr+(offset * io->regspacing));
1396 static void port_cleanup(struct smi_info *info)
1398 unsigned int addr = info->io.addr_data;
1402 for (idx = 0; idx < info->io_size; idx++)
1403 release_region(addr + idx * info->io.regspacing,
1408 static int port_setup(struct smi_info *info)
1410 unsigned int addr = info->io.addr_data;
1416 info->io_cleanup = port_cleanup;
1419 * Figure out the actual inb/inw/inl/etc routine to use based
1420 * upon the register size.
1422 switch (info->io.regsize) {
1424 info->io.inputb = port_inb;
1425 info->io.outputb = port_outb;
1428 info->io.inputb = port_inw;
1429 info->io.outputb = port_outw;
1432 info->io.inputb = port_inl;
1433 info->io.outputb = port_outl;
1436 dev_warn(info->dev, "Invalid register size: %d\n",
1442 * Some BIOSes reserve disjoint I/O regions in their ACPI
1443 * tables. This causes problems when trying to register the
1444 * entire I/O region. Therefore we must register each I/O
1447 for (idx = 0; idx < info->io_size; idx++) {
1448 if (request_region(addr + idx * info->io.regspacing,
1449 info->io.regsize, DEVICE_NAME) == NULL) {
1450 /* Undo allocations */
1452 release_region(addr + idx * info->io.regspacing,
1461 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1463 return readb((io->addr)+(offset * io->regspacing));
1466 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1469 writeb(b, (io->addr)+(offset * io->regspacing));
1472 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1474 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1478 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1481 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1484 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1486 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1490 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1493 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1497 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1499 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1503 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1506 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1510 static void mem_cleanup(struct smi_info *info)
1512 unsigned long addr = info->io.addr_data;
1515 if (info->io.addr) {
1516 iounmap(info->io.addr);
1518 mapsize = ((info->io_size * info->io.regspacing)
1519 - (info->io.regspacing - info->io.regsize));
1521 release_mem_region(addr, mapsize);
1525 static int mem_setup(struct smi_info *info)
1527 unsigned long addr = info->io.addr_data;
1533 info->io_cleanup = mem_cleanup;
1536 * Figure out the actual readb/readw/readl/etc routine to use based
1537 * upon the register size.
1539 switch (info->io.regsize) {
1541 info->io.inputb = intf_mem_inb;
1542 info->io.outputb = intf_mem_outb;
1545 info->io.inputb = intf_mem_inw;
1546 info->io.outputb = intf_mem_outw;
1549 info->io.inputb = intf_mem_inl;
1550 info->io.outputb = intf_mem_outl;
1554 info->io.inputb = mem_inq;
1555 info->io.outputb = mem_outq;
1559 dev_warn(info->dev, "Invalid register size: %d\n",
1565 * Calculate the total amount of memory to claim. This is an
1566 * unusual looking calculation, but it avoids claiming any
1567 * more memory than it has to. It will claim everything
1568 * between the first address to the end of the last full
1571 mapsize = ((info->io_size * info->io.regspacing)
1572 - (info->io.regspacing - info->io.regsize));
1574 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1577 info->io.addr = ioremap(addr, mapsize);
1578 if (info->io.addr == NULL) {
1579 release_mem_region(addr, mapsize);
1586 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1587 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1595 enum hotmod_op { HM_ADD, HM_REMOVE };
1596 struct hotmod_vals {
1600 static struct hotmod_vals hotmod_ops[] = {
1602 { "remove", HM_REMOVE },
1605 static struct hotmod_vals hotmod_si[] = {
1607 { "smic", SI_SMIC },
1611 static struct hotmod_vals hotmod_as[] = {
1612 { "mem", IPMI_MEM_ADDR_SPACE },
1613 { "i/o", IPMI_IO_ADDR_SPACE },
1617 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1622 s = strchr(*curr, ',');
1624 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1629 for (i = 0; hotmod_ops[i].name; i++) {
1630 if (strcmp(*curr, v[i].name) == 0) {
1637 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1641 static int check_hotmod_int_op(const char *curr, const char *option,
1642 const char *name, int *val)
1646 if (strcmp(curr, name) == 0) {
1648 printk(KERN_WARNING PFX
1649 "No option given for '%s'\n",
1653 *val = simple_strtoul(option, &n, 0);
1654 if ((*n != '\0') || (*option == '\0')) {
1655 printk(KERN_WARNING PFX
1656 "Bad option given for '%s'\n",
1665 static int hotmod_handler(const char *val, struct kernel_param *kp)
1667 char *str = kstrdup(val, GFP_KERNEL);
1669 char *next, *curr, *s, *n, *o;
1671 enum si_type si_type;
1681 struct smi_info *info;
1686 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1689 while ((ival >= 0) && isspace(str[ival])) {
1694 for (curr = str; curr; curr = next) {
1699 ipmb = 0; /* Choose the default if not specified */
1701 next = strchr(curr, ':');
1707 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1712 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1717 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1721 s = strchr(curr, ',');
1726 addr = simple_strtoul(curr, &n, 0);
1727 if ((*n != '\0') || (*curr == '\0')) {
1728 printk(KERN_WARNING PFX "Invalid hotmod address"
1735 s = strchr(curr, ',');
1740 o = strchr(curr, '=');
1745 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1750 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1755 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1760 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1765 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1772 printk(KERN_WARNING PFX
1773 "Invalid hotmod option '%s'\n",
1779 info = kzalloc(sizeof(*info), GFP_KERNEL);
1785 info->addr_source = SI_HOTMOD;
1786 info->si_type = si_type;
1787 info->io.addr_data = addr;
1788 info->io.addr_type = addr_space;
1789 if (addr_space == IPMI_MEM_ADDR_SPACE)
1790 info->io_setup = mem_setup;
1792 info->io_setup = port_setup;
1794 info->io.addr = NULL;
1795 info->io.regspacing = regspacing;
1796 if (!info->io.regspacing)
1797 info->io.regspacing = DEFAULT_REGSPACING;
1798 info->io.regsize = regsize;
1799 if (!info->io.regsize)
1800 info->io.regsize = DEFAULT_REGSPACING;
1801 info->io.regshift = regshift;
1804 info->irq_setup = std_irq_setup;
1805 info->slave_addr = ipmb;
1807 if (!add_smi(info)) {
1808 if (try_smi_init(info))
1809 cleanup_one_si(info);
1815 struct smi_info *e, *tmp_e;
1817 mutex_lock(&smi_infos_lock);
1818 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1819 if (e->io.addr_type != addr_space)
1821 if (e->si_type != si_type)
1823 if (e->io.addr_data == addr)
1826 mutex_unlock(&smi_infos_lock);
1835 static __devinit void hardcode_find_bmc(void)
1838 struct smi_info *info;
1840 for (i = 0; i < SI_MAX_PARMS; i++) {
1841 if (!ports[i] && !addrs[i])
1844 info = kzalloc(sizeof(*info), GFP_KERNEL);
1848 info->addr_source = SI_HARDCODED;
1849 printk(KERN_INFO PFX "probing via hardcoded address\n");
1851 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1852 info->si_type = SI_KCS;
1853 } else if (strcmp(si_type[i], "smic") == 0) {
1854 info->si_type = SI_SMIC;
1855 } else if (strcmp(si_type[i], "bt") == 0) {
1856 info->si_type = SI_BT;
1858 printk(KERN_WARNING PFX "Interface type specified "
1859 "for interface %d, was invalid: %s\n",
1867 info->io_setup = port_setup;
1868 info->io.addr_data = ports[i];
1869 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1870 } else if (addrs[i]) {
1872 info->io_setup = mem_setup;
1873 info->io.addr_data = addrs[i];
1874 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1876 printk(KERN_WARNING PFX "Interface type specified "
1877 "for interface %d, but port and address were "
1878 "not set or set to zero.\n", i);
1883 info->io.addr = NULL;
1884 info->io.regspacing = regspacings[i];
1885 if (!info->io.regspacing)
1886 info->io.regspacing = DEFAULT_REGSPACING;
1887 info->io.regsize = regsizes[i];
1888 if (!info->io.regsize)
1889 info->io.regsize = DEFAULT_REGSPACING;
1890 info->io.regshift = regshifts[i];
1891 info->irq = irqs[i];
1893 info->irq_setup = std_irq_setup;
1894 info->slave_addr = slave_addrs[i];
1896 if (!add_smi(info)) {
1897 if (try_smi_init(info))
1898 cleanup_one_si(info);
1907 #include <linux/acpi.h>
1910 * Once we get an ACPI failure, we don't try any more, because we go
1911 * through the tables sequentially. Once we don't find a table, there
1914 static int acpi_failure;
1916 /* For GPE-type interrupts. */
1917 static u32 ipmi_acpi_gpe(void *context)
1919 struct smi_info *smi_info = context;
1920 unsigned long flags;
1925 spin_lock_irqsave(&(smi_info->si_lock), flags);
1927 smi_inc_stat(smi_info, interrupts);
1930 do_gettimeofday(&t);
1931 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1933 smi_event_handler(smi_info, 0);
1934 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1936 return ACPI_INTERRUPT_HANDLED;
1939 static void acpi_gpe_irq_cleanup(struct smi_info *info)
1944 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1947 static int acpi_gpe_irq_setup(struct smi_info *info)
1954 /* FIXME - is level triggered right? */
1955 status = acpi_install_gpe_handler(NULL,
1957 ACPI_GPE_LEVEL_TRIGGERED,
1960 if (status != AE_OK) {
1961 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1962 " running polled\n", DEVICE_NAME, info->irq);
1966 info->irq_cleanup = acpi_gpe_irq_cleanup;
1967 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
1974 * http://h21007.www2.hp.com/portal/download/files
1975 * /unprot/hpspmi.pdf
1986 s8 CreatorRevision[4];
1989 s16 SpecificationRevision;
1992 * Bit 0 - SCI interrupt supported
1993 * Bit 1 - I/O APIC/SAPIC
1998 * If bit 0 of InterruptType is set, then this is the SCI
1999 * interrupt in the GPEx_STS register.
2006 * If bit 1 of InterruptType is set, then this is the I/O
2007 * APIC/SAPIC interrupt.
2009 u32 GlobalSystemInterrupt;
2011 /* The actual register address. */
2012 struct acpi_generic_address addr;
2016 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2019 static __devinit int try_init_spmi(struct SPMITable *spmi)
2021 struct smi_info *info;
2023 if (spmi->IPMIlegacy != 1) {
2024 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2028 info = kzalloc(sizeof(*info), GFP_KERNEL);
2030 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2034 info->addr_source = SI_SPMI;
2035 printk(KERN_INFO PFX "probing via SPMI\n");
2037 /* Figure out the interface type. */
2038 switch (spmi->InterfaceType) {
2040 info->si_type = SI_KCS;
2043 info->si_type = SI_SMIC;
2046 info->si_type = SI_BT;
2049 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2050 spmi->InterfaceType);
2055 if (spmi->InterruptType & 1) {
2056 /* We've got a GPE interrupt. */
2057 info->irq = spmi->GPE;
2058 info->irq_setup = acpi_gpe_irq_setup;
2059 } else if (spmi->InterruptType & 2) {
2060 /* We've got an APIC/SAPIC interrupt. */
2061 info->irq = spmi->GlobalSystemInterrupt;
2062 info->irq_setup = std_irq_setup;
2064 /* Use the default interrupt setting. */
2066 info->irq_setup = NULL;
2069 if (spmi->addr.bit_width) {
2070 /* A (hopefully) properly formed register bit width. */
2071 info->io.regspacing = spmi->addr.bit_width / 8;
2073 info->io.regspacing = DEFAULT_REGSPACING;
2075 info->io.regsize = info->io.regspacing;
2076 info->io.regshift = spmi->addr.bit_offset;
2078 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2079 info->io_setup = mem_setup;
2080 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2081 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2082 info->io_setup = port_setup;
2083 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2086 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2089 info->io.addr_data = spmi->addr.address;
2091 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2092 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2093 info->io.addr_data, info->io.regsize, info->io.regspacing,
2102 static __devinit void spmi_find_bmc(void)
2105 struct SPMITable *spmi;
2114 for (i = 0; ; i++) {
2115 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2116 (struct acpi_table_header **)&spmi);
2117 if (status != AE_OK)
2120 try_init_spmi(spmi);
2124 static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2125 const struct pnp_device_id *dev_id)
2127 struct acpi_device *acpi_dev;
2128 struct smi_info *info;
2129 struct resource *res;
2132 unsigned long long tmp;
2134 acpi_dev = pnp_acpi_device(dev);
2138 info = kzalloc(sizeof(*info), GFP_KERNEL);
2142 info->addr_source = SI_ACPI;
2143 printk(KERN_INFO PFX "probing via ACPI\n");
2145 handle = acpi_dev->handle;
2147 /* _IFT tells us the interface type: KCS, BT, etc */
2148 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2149 if (ACPI_FAILURE(status))
2154 info->si_type = SI_KCS;
2157 info->si_type = SI_SMIC;
2160 info->si_type = SI_BT;
2163 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2167 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2169 info->io_setup = port_setup;
2170 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2172 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2174 info->io_setup = mem_setup;
2175 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2179 dev_err(&dev->dev, "no I/O or memory address\n");
2182 info->io.addr_data = res->start;
2184 info->io.regspacing = DEFAULT_REGSPACING;
2185 res = pnp_get_resource(dev,
2186 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2187 IORESOURCE_IO : IORESOURCE_MEM,
2190 if (res->start > info->io.addr_data)
2191 info->io.regspacing = res->start - info->io.addr_data;
2193 info->io.regsize = DEFAULT_REGSPACING;
2194 info->io.regshift = 0;
2196 /* If _GPE exists, use it; otherwise use standard interrupts */
2197 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2198 if (ACPI_SUCCESS(status)) {
2200 info->irq_setup = acpi_gpe_irq_setup;
2201 } else if (pnp_irq_valid(dev, 0)) {
2202 info->irq = pnp_irq(dev, 0);
2203 info->irq_setup = std_irq_setup;
2206 info->dev = &dev->dev;
2207 pnp_set_drvdata(dev, info);
2209 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2210 res, info->io.regsize, info->io.regspacing,
2223 static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2225 struct smi_info *info = pnp_get_drvdata(dev);
2227 cleanup_one_si(info);
2230 static const struct pnp_device_id pnp_dev_table[] = {
2235 static struct pnp_driver ipmi_pnp_driver = {
2236 .name = DEVICE_NAME,
2237 .probe = ipmi_pnp_probe,
2238 .remove = __devexit_p(ipmi_pnp_remove),
2239 .id_table = pnp_dev_table,
2244 struct dmi_ipmi_data {
2247 unsigned long base_addr;
2253 static int __devinit decode_dmi(const struct dmi_header *dm,
2254 struct dmi_ipmi_data *dmi)
2256 const u8 *data = (const u8 *)dm;
2257 unsigned long base_addr;
2259 u8 len = dm->length;
2261 dmi->type = data[4];
2263 memcpy(&base_addr, data+8, sizeof(unsigned long));
2265 if (base_addr & 1) {
2267 base_addr &= 0xFFFE;
2268 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2271 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2273 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2275 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2277 dmi->irq = data[0x11];
2279 /* The top two bits of byte 0x10 hold the register spacing. */
2280 reg_spacing = (data[0x10] & 0xC0) >> 6;
2281 switch (reg_spacing) {
2282 case 0x00: /* Byte boundaries */
2285 case 0x01: /* 32-bit boundaries */
2288 case 0x02: /* 16-byte boundaries */
2292 /* Some other interface, just ignore it. */
2298 * Note that technically, the lower bit of the base
2299 * address should be 1 if the address is I/O and 0 if
2300 * the address is in memory. So many systems get that
2301 * wrong (and all that I have seen are I/O) so we just
2302 * ignore that bit and assume I/O. Systems that use
2303 * memory should use the newer spec, anyway.
2305 dmi->base_addr = base_addr & 0xfffe;
2306 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2310 dmi->slave_addr = data[6];
2315 static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2317 struct smi_info *info;
2319 info = kzalloc(sizeof(*info), GFP_KERNEL);
2321 printk(KERN_ERR PFX "Could not allocate SI data\n");
2325 info->addr_source = SI_SMBIOS;
2326 printk(KERN_INFO PFX "probing via SMBIOS\n");
2328 switch (ipmi_data->type) {
2329 case 0x01: /* KCS */
2330 info->si_type = SI_KCS;
2332 case 0x02: /* SMIC */
2333 info->si_type = SI_SMIC;
2336 info->si_type = SI_BT;
2343 switch (ipmi_data->addr_space) {
2344 case IPMI_MEM_ADDR_SPACE:
2345 info->io_setup = mem_setup;
2346 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2349 case IPMI_IO_ADDR_SPACE:
2350 info->io_setup = port_setup;
2351 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2356 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2357 ipmi_data->addr_space);
2360 info->io.addr_data = ipmi_data->base_addr;
2362 info->io.regspacing = ipmi_data->offset;
2363 if (!info->io.regspacing)
2364 info->io.regspacing = DEFAULT_REGSPACING;
2365 info->io.regsize = DEFAULT_REGSPACING;
2366 info->io.regshift = 0;
2368 info->slave_addr = ipmi_data->slave_addr;
2370 info->irq = ipmi_data->irq;
2372 info->irq_setup = std_irq_setup;
2374 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2375 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2376 info->io.addr_data, info->io.regsize, info->io.regspacing,
2383 static void __devinit dmi_find_bmc(void)
2385 const struct dmi_device *dev = NULL;
2386 struct dmi_ipmi_data data;
2389 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2390 memset(&data, 0, sizeof(data));
2391 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2394 try_init_dmi(&data);
2397 #endif /* CONFIG_DMI */
2401 #define PCI_ERMC_CLASSCODE 0x0C0700
2402 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2403 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2404 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2405 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2406 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2408 #define PCI_HP_VENDOR_ID 0x103C
2409 #define PCI_MMC_DEVICE_ID 0x121A
2410 #define PCI_MMC_ADDR_CW 0x10
2412 static void ipmi_pci_cleanup(struct smi_info *info)
2414 struct pci_dev *pdev = info->addr_source_data;
2416 pci_disable_device(pdev);
2419 static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2420 const struct pci_device_id *ent)
2423 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2424 struct smi_info *info;
2426 info = kzalloc(sizeof(*info), GFP_KERNEL);
2430 info->addr_source = SI_PCI;
2431 dev_info(&pdev->dev, "probing via PCI");
2433 switch (class_type) {
2434 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2435 info->si_type = SI_SMIC;
2438 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2439 info->si_type = SI_KCS;
2442 case PCI_ERMC_CLASSCODE_TYPE_BT:
2443 info->si_type = SI_BT;
2448 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2452 rv = pci_enable_device(pdev);
2454 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2459 info->addr_source_cleanup = ipmi_pci_cleanup;
2460 info->addr_source_data = pdev;
2462 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2463 info->io_setup = port_setup;
2464 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2466 info->io_setup = mem_setup;
2467 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2469 info->io.addr_data = pci_resource_start(pdev, 0);
2471 info->io.regspacing = DEFAULT_REGSPACING;
2472 info->io.regsize = DEFAULT_REGSPACING;
2473 info->io.regshift = 0;
2475 info->irq = pdev->irq;
2477 info->irq_setup = std_irq_setup;
2479 info->dev = &pdev->dev;
2480 pci_set_drvdata(pdev, info);
2482 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2483 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2492 static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2494 struct smi_info *info = pci_get_drvdata(pdev);
2495 cleanup_one_si(info);
2499 static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2504 static int ipmi_pci_resume(struct pci_dev *pdev)
2510 static struct pci_device_id ipmi_pci_devices[] = {
2511 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2512 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2515 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2517 static struct pci_driver ipmi_pci_driver = {
2518 .name = DEVICE_NAME,
2519 .id_table = ipmi_pci_devices,
2520 .probe = ipmi_pci_probe,
2521 .remove = __devexit_p(ipmi_pci_remove),
2523 .suspend = ipmi_pci_suspend,
2524 .resume = ipmi_pci_resume,
2527 #endif /* CONFIG_PCI */
2530 #ifdef CONFIG_PPC_OF
2531 static int __devinit ipmi_of_probe(struct platform_device *dev,
2532 const struct of_device_id *match)
2534 struct smi_info *info;
2535 struct resource resource;
2536 const int *regsize, *regspacing, *regshift;
2537 struct device_node *np = dev->dev.of_node;
2541 dev_info(&dev->dev, "probing via device tree\n");
2543 ret = of_address_to_resource(np, 0, &resource);
2545 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2549 regsize = of_get_property(np, "reg-size", &proplen);
2550 if (regsize && proplen != 4) {
2551 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2555 regspacing = of_get_property(np, "reg-spacing", &proplen);
2556 if (regspacing && proplen != 4) {
2557 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2561 regshift = of_get_property(np, "reg-shift", &proplen);
2562 if (regshift && proplen != 4) {
2563 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2567 info = kzalloc(sizeof(*info), GFP_KERNEL);
2571 "could not allocate memory for OF probe\n");
2575 info->si_type = (enum si_type) match->data;
2576 info->addr_source = SI_DEVICETREE;
2577 info->irq_setup = std_irq_setup;
2579 if (resource.flags & IORESOURCE_IO) {
2580 info->io_setup = port_setup;
2581 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2583 info->io_setup = mem_setup;
2584 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2587 info->io.addr_data = resource.start;
2589 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE;
2590 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING;
2591 info->io.regshift = regshift ? *regshift : 0;
2593 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2594 info->dev = &dev->dev;
2596 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2597 info->io.addr_data, info->io.regsize, info->io.regspacing,
2600 dev_set_drvdata(&dev->dev, info);
2602 if (add_smi(info)) {
2610 static int __devexit ipmi_of_remove(struct platform_device *dev)
2612 cleanup_one_si(dev_get_drvdata(&dev->dev));
2616 static struct of_device_id ipmi_match[] =
2618 { .type = "ipmi", .compatible = "ipmi-kcs",
2619 .data = (void *)(unsigned long) SI_KCS },
2620 { .type = "ipmi", .compatible = "ipmi-smic",
2621 .data = (void *)(unsigned long) SI_SMIC },
2622 { .type = "ipmi", .compatible = "ipmi-bt",
2623 .data = (void *)(unsigned long) SI_BT },
2627 static struct of_platform_driver ipmi_of_platform_driver = {
2630 .owner = THIS_MODULE,
2631 .of_match_table = ipmi_match,
2633 .probe = ipmi_of_probe,
2634 .remove = __devexit_p(ipmi_of_remove),
2636 #endif /* CONFIG_PPC_OF */
2638 static int wait_for_msg_done(struct smi_info *smi_info)
2640 enum si_sm_result smi_result;
2642 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2644 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2645 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2646 schedule_timeout_uninterruptible(1);
2647 smi_result = smi_info->handlers->event(
2648 smi_info->si_sm, 100);
2649 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2650 smi_result = smi_info->handlers->event(
2651 smi_info->si_sm, 0);
2655 if (smi_result == SI_SM_HOSED)
2657 * We couldn't get the state machine to run, so whatever's at
2658 * the port is probably not an IPMI SMI interface.
2665 static int try_get_dev_id(struct smi_info *smi_info)
2667 unsigned char msg[2];
2668 unsigned char *resp;
2669 unsigned long resp_len;
2672 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2677 * Do a Get Device ID command, since it comes back with some
2680 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2681 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2682 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2684 rv = wait_for_msg_done(smi_info);
2688 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2689 resp, IPMI_MAX_MSG_LENGTH);
2691 /* Check and record info from the get device id, in case we need it. */
2692 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2699 static int try_enable_event_buffer(struct smi_info *smi_info)
2701 unsigned char msg[3];
2702 unsigned char *resp;
2703 unsigned long resp_len;
2706 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2710 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2711 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2712 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2714 rv = wait_for_msg_done(smi_info);
2716 printk(KERN_WARNING PFX "Error getting response from get"
2717 " global enables command, the event buffer is not"
2722 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2723 resp, IPMI_MAX_MSG_LENGTH);
2726 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2727 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2729 printk(KERN_WARNING PFX "Invalid return from get global"
2730 " enables command, cannot enable the event buffer.\n");
2735 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2736 /* buffer is already enabled, nothing to do. */
2739 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2740 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2741 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2742 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2744 rv = wait_for_msg_done(smi_info);
2746 printk(KERN_WARNING PFX "Error getting response from set"
2747 " global, enables command, the event buffer is not"
2752 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2753 resp, IPMI_MAX_MSG_LENGTH);
2756 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2757 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2758 printk(KERN_WARNING PFX "Invalid return from get global,"
2759 "enables command, not enable the event buffer.\n");
2766 * An error when setting the event buffer bit means
2767 * that the event buffer is not supported.
2775 static int type_file_read_proc(char *page, char **start, off_t off,
2776 int count, int *eof, void *data)
2778 struct smi_info *smi = data;
2780 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
2783 static int stat_file_read_proc(char *page, char **start, off_t off,
2784 int count, int *eof, void *data)
2786 char *out = (char *) page;
2787 struct smi_info *smi = data;
2789 out += sprintf(out, "interrupts_enabled: %d\n",
2790 smi->irq && !smi->interrupt_disabled);
2791 out += sprintf(out, "short_timeouts: %u\n",
2792 smi_get_stat(smi, short_timeouts));
2793 out += sprintf(out, "long_timeouts: %u\n",
2794 smi_get_stat(smi, long_timeouts));
2795 out += sprintf(out, "idles: %u\n",
2796 smi_get_stat(smi, idles));
2797 out += sprintf(out, "interrupts: %u\n",
2798 smi_get_stat(smi, interrupts));
2799 out += sprintf(out, "attentions: %u\n",
2800 smi_get_stat(smi, attentions));
2801 out += sprintf(out, "flag_fetches: %u\n",
2802 smi_get_stat(smi, flag_fetches));
2803 out += sprintf(out, "hosed_count: %u\n",
2804 smi_get_stat(smi, hosed_count));
2805 out += sprintf(out, "complete_transactions: %u\n",
2806 smi_get_stat(smi, complete_transactions));
2807 out += sprintf(out, "events: %u\n",
2808 smi_get_stat(smi, events));
2809 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2810 smi_get_stat(smi, watchdog_pretimeouts));
2811 out += sprintf(out, "incoming_messages: %u\n",
2812 smi_get_stat(smi, incoming_messages));
2817 static int param_read_proc(char *page, char **start, off_t off,
2818 int count, int *eof, void *data)
2820 struct smi_info *smi = data;
2822 return sprintf(page,
2823 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2824 si_to_str[smi->si_type],
2825 addr_space_to_str[smi->io.addr_type],
2835 * oem_data_avail_to_receive_msg_avail
2836 * @info - smi_info structure with msg_flags set
2838 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2839 * Returns 1 indicating need to re-run handle_flags().
2841 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2843 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2849 * setup_dell_poweredge_oem_data_handler
2850 * @info - smi_info.device_id must be populated
2852 * Systems that match, but have firmware version < 1.40 may assert
2853 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2854 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2855 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2856 * as RECEIVE_MSG_AVAIL instead.
2858 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2859 * assert the OEM[012] bits, and if it did, the driver would have to
2860 * change to handle that properly, we don't actually check for the
2862 * Device ID = 0x20 BMC on PowerEdge 8G servers
2863 * Device Revision = 0x80
2864 * Firmware Revision1 = 0x01 BMC version 1.40
2865 * Firmware Revision2 = 0x40 BCD encoded
2866 * IPMI Version = 0x51 IPMI 1.5
2867 * Manufacturer ID = A2 02 00 Dell IANA
2869 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2870 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2873 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2874 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2875 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2876 #define DELL_IANA_MFR_ID 0x0002a2
2877 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2879 struct ipmi_device_id *id = &smi_info->device_id;
2880 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
2881 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2882 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2883 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2884 smi_info->oem_data_avail_handler =
2885 oem_data_avail_to_receive_msg_avail;
2886 } else if (ipmi_version_major(id) < 1 ||
2887 (ipmi_version_major(id) == 1 &&
2888 ipmi_version_minor(id) < 5)) {
2889 smi_info->oem_data_avail_handler =
2890 oem_data_avail_to_receive_msg_avail;
2895 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2896 static void return_hosed_msg_badsize(struct smi_info *smi_info)
2898 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2900 /* Make it a reponse */
2901 msg->rsp[0] = msg->data[0] | 4;
2902 msg->rsp[1] = msg->data[1];
2903 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2905 smi_info->curr_msg = NULL;
2906 deliver_recv_msg(smi_info, msg);
2910 * dell_poweredge_bt_xaction_handler
2911 * @info - smi_info.device_id must be populated
2913 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2914 * not respond to a Get SDR command if the length of the data
2915 * requested is exactly 0x3A, which leads to command timeouts and no
2916 * data returned. This intercepts such commands, and causes userspace
2917 * callers to try again with a different-sized buffer, which succeeds.
2920 #define STORAGE_NETFN 0x0A
2921 #define STORAGE_CMD_GET_SDR 0x23
2922 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2923 unsigned long unused,
2926 struct smi_info *smi_info = in;
2927 unsigned char *data = smi_info->curr_msg->data;
2928 unsigned int size = smi_info->curr_msg->data_size;
2930 (data[0]>>2) == STORAGE_NETFN &&
2931 data[1] == STORAGE_CMD_GET_SDR &&
2933 return_hosed_msg_badsize(smi_info);
2939 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2940 .notifier_call = dell_poweredge_bt_xaction_handler,
2944 * setup_dell_poweredge_bt_xaction_handler
2945 * @info - smi_info.device_id must be filled in already
2947 * Fills in smi_info.device_id.start_transaction_pre_hook
2948 * when we know what function to use there.
2951 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2953 struct ipmi_device_id *id = &smi_info->device_id;
2954 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
2955 smi_info->si_type == SI_BT)
2956 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2960 * setup_oem_data_handler
2961 * @info - smi_info.device_id must be filled in already
2963 * Fills in smi_info.device_id.oem_data_available_handler
2964 * when we know what function to use there.
2967 static void setup_oem_data_handler(struct smi_info *smi_info)
2969 setup_dell_poweredge_oem_data_handler(smi_info);
2972 static void setup_xaction_handlers(struct smi_info *smi_info)
2974 setup_dell_poweredge_bt_xaction_handler(smi_info);
2977 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
2979 if (smi_info->intf) {
2981 * The timer and thread are only running if the
2982 * interface has been started up and registered.
2984 if (smi_info->thread != NULL)
2985 kthread_stop(smi_info->thread);
2986 del_timer_sync(&smi_info->si_timer);
2990 static __devinitdata struct ipmi_default_vals
2996 { .type = SI_KCS, .port = 0xca2 },
2997 { .type = SI_SMIC, .port = 0xca9 },
2998 { .type = SI_BT, .port = 0xe4 },
3002 static __devinit void default_find_bmc(void)
3004 struct smi_info *info;
3007 for (i = 0; ; i++) {
3008 if (!ipmi_defaults[i].port)
3011 if (check_legacy_ioport(ipmi_defaults[i].port))
3014 info = kzalloc(sizeof(*info), GFP_KERNEL);
3018 info->addr_source = SI_DEFAULT;
3020 info->si_type = ipmi_defaults[i].type;
3021 info->io_setup = port_setup;
3022 info->io.addr_data = ipmi_defaults[i].port;
3023 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3025 info->io.addr = NULL;
3026 info->io.regspacing = DEFAULT_REGSPACING;
3027 info->io.regsize = DEFAULT_REGSPACING;
3028 info->io.regshift = 0;
3030 if (add_smi(info) == 0) {
3031 if ((try_smi_init(info)) == 0) {
3033 printk(KERN_INFO PFX "Found default %s"
3034 " state machine at %s address 0x%lx\n",
3035 si_to_str[info->si_type],
3036 addr_space_to_str[info->io.addr_type],
3037 info->io.addr_data);
3039 cleanup_one_si(info);
3046 static int is_new_interface(struct smi_info *info)
3050 list_for_each_entry(e, &smi_infos, link) {
3051 if (e->io.addr_type != info->io.addr_type)
3053 if (e->io.addr_data == info->io.addr_data)
3060 static int add_smi(struct smi_info *new_smi)
3064 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3065 ipmi_addr_src_to_str[new_smi->addr_source],
3066 si_to_str[new_smi->si_type]);
3067 mutex_lock(&smi_infos_lock);
3068 if (!is_new_interface(new_smi)) {
3069 printk(KERN_CONT " duplicate interface\n");
3074 printk(KERN_CONT "\n");
3076 /* So we know not to free it unless we have allocated one. */
3077 new_smi->intf = NULL;
3078 new_smi->si_sm = NULL;
3079 new_smi->handlers = NULL;
3081 list_add_tail(&new_smi->link, &smi_infos);
3084 mutex_unlock(&smi_infos_lock);
3088 static int try_smi_init(struct smi_info *new_smi)
3093 printk(KERN_INFO PFX "Trying %s-specified %s state"
3094 " machine at %s address 0x%lx, slave address 0x%x,"
3096 ipmi_addr_src_to_str[new_smi->addr_source],
3097 si_to_str[new_smi->si_type],
3098 addr_space_to_str[new_smi->io.addr_type],
3099 new_smi->io.addr_data,
3100 new_smi->slave_addr, new_smi->irq);
3102 switch (new_smi->si_type) {
3104 new_smi->handlers = &kcs_smi_handlers;
3108 new_smi->handlers = &smic_smi_handlers;
3112 new_smi->handlers = &bt_smi_handlers;
3116 /* No support for anything else yet. */
3121 /* Allocate the state machine's data and initialize it. */
3122 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3123 if (!new_smi->si_sm) {
3125 "Could not allocate state machine memory\n");
3129 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3132 /* Now that we know the I/O size, we can set up the I/O. */
3133 rv = new_smi->io_setup(new_smi);
3135 printk(KERN_ERR PFX "Could not set up I/O space\n");
3139 spin_lock_init(&(new_smi->si_lock));
3140 spin_lock_init(&(new_smi->msg_lock));
3142 /* Do low-level detection first. */
3143 if (new_smi->handlers->detect(new_smi->si_sm)) {
3144 if (new_smi->addr_source)
3145 printk(KERN_INFO PFX "Interface detection failed\n");
3151 * Attempt a get device id command. If it fails, we probably
3152 * don't have a BMC here.
3154 rv = try_get_dev_id(new_smi);
3156 if (new_smi->addr_source)
3157 printk(KERN_INFO PFX "There appears to be no BMC"
3158 " at this location\n");
3162 setup_oem_data_handler(new_smi);
3163 setup_xaction_handlers(new_smi);
3165 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3166 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3167 new_smi->curr_msg = NULL;
3168 atomic_set(&new_smi->req_events, 0);
3169 new_smi->run_to_completion = 0;
3170 for (i = 0; i < SI_NUM_STATS; i++)
3171 atomic_set(&new_smi->stats[i], 0);
3173 new_smi->interrupt_disabled = 1;
3174 atomic_set(&new_smi->stop_operation, 0);
3175 new_smi->intf_num = smi_num;
3178 rv = try_enable_event_buffer(new_smi);
3180 new_smi->has_event_buffer = 1;
3183 * Start clearing the flags before we enable interrupts or the
3184 * timer to avoid racing with the timer.
3186 start_clear_flags(new_smi);
3187 /* IRQ is defined to be set when non-zero. */
3189 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3191 if (!new_smi->dev) {
3193 * If we don't already have a device from something
3194 * else (like PCI), then register a new one.
3196 new_smi->pdev = platform_device_alloc("ipmi_si",
3198 if (!new_smi->pdev) {
3200 "Unable to allocate platform device\n");
3203 new_smi->dev = &new_smi->pdev->dev;
3204 new_smi->dev->driver = &ipmi_driver.driver;
3206 rv = platform_device_add(new_smi->pdev);
3209 "Unable to register system interface device:"
3214 new_smi->dev_registered = 1;
3217 rv = ipmi_register_smi(&handlers,
3219 &new_smi->device_id,
3222 new_smi->slave_addr);
3224 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3226 goto out_err_stop_timer;
3229 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3230 type_file_read_proc,
3233 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3234 goto out_err_stop_timer;
3237 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3238 stat_file_read_proc,
3241 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3242 goto out_err_stop_timer;
3245 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3249 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3250 goto out_err_stop_timer;
3253 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3254 si_to_str[new_smi->si_type]);
3259 atomic_inc(&new_smi->stop_operation);
3260 wait_for_timer_and_thread(new_smi);
3263 new_smi->interrupt_disabled = 1;
3265 if (new_smi->intf) {
3266 ipmi_unregister_smi(new_smi->intf);
3267 new_smi->intf = NULL;
3270 if (new_smi->irq_cleanup) {
3271 new_smi->irq_cleanup(new_smi);
3272 new_smi->irq_cleanup = NULL;
3276 * Wait until we know that we are out of any interrupt
3277 * handlers might have been running before we freed the
3280 synchronize_sched();
3282 if (new_smi->si_sm) {
3283 if (new_smi->handlers)
3284 new_smi->handlers->cleanup(new_smi->si_sm);
3285 kfree(new_smi->si_sm);
3286 new_smi->si_sm = NULL;
3288 if (new_smi->addr_source_cleanup) {
3289 new_smi->addr_source_cleanup(new_smi);
3290 new_smi->addr_source_cleanup = NULL;
3292 if (new_smi->io_cleanup) {
3293 new_smi->io_cleanup(new_smi);
3294 new_smi->io_cleanup = NULL;
3297 if (new_smi->dev_registered) {
3298 platform_device_unregister(new_smi->pdev);
3299 new_smi->dev_registered = 0;
3305 static __devinit int init_ipmi_si(void)
3311 enum ipmi_addr_src type = SI_INVALID;
3317 /* Register the device drivers. */
3318 rv = driver_register(&ipmi_driver.driver);
3320 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
3325 /* Parse out the si_type string into its components. */
3328 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3330 str = strchr(str, ',');
3340 printk(KERN_INFO "IPMI System Interface driver.\n");
3342 hardcode_find_bmc();
3344 /* If the user gave us a device, they presumably want us to use it */
3345 mutex_lock(&smi_infos_lock);
3346 if (!list_empty(&smi_infos)) {
3347 mutex_unlock(&smi_infos_lock);
3350 mutex_unlock(&smi_infos_lock);
3353 rv = pci_register_driver(&ipmi_pci_driver);
3355 printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv);
3361 pnp_register_driver(&ipmi_pnp_driver);
3372 #ifdef CONFIG_PPC_OF
3373 of_register_platform_driver(&ipmi_of_platform_driver);
3377 /* We prefer devices with interrupts, but in the case of a machine
3378 with multiple BMCs we assume that there will be several instances
3379 of a given type so if we succeed in registering a type then also
3380 try to register everything else of the same type */
3382 mutex_lock(&smi_infos_lock);
3383 list_for_each_entry(e, &smi_infos, link) {
3384 /* Try to register a device if it has an IRQ and we either
3385 haven't successfully registered a device yet or this
3386 device has the same type as one we successfully registered */
3387 if (e->irq && (!type || e->addr_source == type)) {
3388 if (!try_smi_init(e)) {
3389 type = e->addr_source;
3394 /* type will only have been set if we successfully registered an si */
3396 mutex_unlock(&smi_infos_lock);
3400 /* Fall back to the preferred device */
3402 list_for_each_entry(e, &smi_infos, link) {
3403 if (!e->irq && (!type || e->addr_source == type)) {
3404 if (!try_smi_init(e)) {
3405 type = e->addr_source;
3409 mutex_unlock(&smi_infos_lock);
3414 if (si_trydefaults) {
3415 mutex_lock(&smi_infos_lock);
3416 if (list_empty(&smi_infos)) {
3417 /* No BMC was found, try defaults. */
3418 mutex_unlock(&smi_infos_lock);
3421 mutex_unlock(&smi_infos_lock);
3424 mutex_lock(&smi_infos_lock);
3425 if (unload_when_empty && list_empty(&smi_infos)) {
3426 mutex_unlock(&smi_infos_lock);
3429 pci_unregister_driver(&ipmi_pci_driver);
3432 #ifdef CONFIG_PPC_OF
3434 of_unregister_platform_driver(&ipmi_of_platform_driver);
3436 driver_unregister(&ipmi_driver.driver);
3437 printk(KERN_WARNING PFX
3438 "Unable to find any System Interface(s)\n");
3441 mutex_unlock(&smi_infos_lock);
3445 module_init(init_ipmi_si);
3447 static void cleanup_one_si(struct smi_info *to_clean)
3450 unsigned long flags;
3455 list_del(&to_clean->link);
3457 /* Tell the driver that we are shutting down. */
3458 atomic_inc(&to_clean->stop_operation);
3461 * Make sure the timer and thread are stopped and will not run
3464 wait_for_timer_and_thread(to_clean);
3467 * Timeouts are stopped, now make sure the interrupts are off
3468 * for the device. A little tricky with locks to make sure
3469 * there are no races.
3471 spin_lock_irqsave(&to_clean->si_lock, flags);
3472 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3473 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3475 schedule_timeout_uninterruptible(1);
3476 spin_lock_irqsave(&to_clean->si_lock, flags);
3478 disable_si_irq(to_clean);
3479 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3480 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3482 schedule_timeout_uninterruptible(1);
3485 /* Clean up interrupts and make sure that everything is done. */
3486 if (to_clean->irq_cleanup)
3487 to_clean->irq_cleanup(to_clean);
3488 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3490 schedule_timeout_uninterruptible(1);
3494 rv = ipmi_unregister_smi(to_clean->intf);
3497 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3501 if (to_clean->handlers)
3502 to_clean->handlers->cleanup(to_clean->si_sm);
3504 kfree(to_clean->si_sm);
3506 if (to_clean->addr_source_cleanup)
3507 to_clean->addr_source_cleanup(to_clean);
3508 if (to_clean->io_cleanup)
3509 to_clean->io_cleanup(to_clean);
3511 if (to_clean->dev_registered)
3512 platform_device_unregister(to_clean->pdev);
3517 static __exit void cleanup_ipmi_si(void)
3519 struct smi_info *e, *tmp_e;
3526 pci_unregister_driver(&ipmi_pci_driver);
3529 pnp_unregister_driver(&ipmi_pnp_driver);
3532 #ifdef CONFIG_PPC_OF
3534 of_unregister_platform_driver(&ipmi_of_platform_driver);
3537 mutex_lock(&smi_infos_lock);
3538 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3540 mutex_unlock(&smi_infos_lock);
3542 driver_unregister(&ipmi_driver.driver);
3544 module_exit(cleanup_ipmi_si);
3546 MODULE_LICENSE("GPL");
3547 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3548 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3549 " system interfaces.");