4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <asm/system.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/errno.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/list.h>
52 #include <linux/pci.h>
53 #include <linux/ioport.h>
54 #include <linux/notifier.h>
55 #include <linux/mutex.h>
56 #include <linux/kthread.h>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi.h>
61 #include <linux/ipmi_smi.h>
63 #include "ipmi_si_sm.h"
64 #include <linux/init.h>
65 #include <linux/dmi.h>
66 #include <linux/string.h>
67 #include <linux/ctype.h>
68 #include <linux/pnp.h>
71 #include <linux/of_device.h>
72 #include <linux/of_platform.h>
75 #define PFX "ipmi_si: "
77 /* Measure times between events in the driver. */
80 /* Call every 10 ms. */
81 #define SI_TIMEOUT_TIME_USEC 10000
82 #define SI_USEC_PER_JIFFY (1000000/HZ)
83 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
84 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
92 SI_CLEARING_FLAGS_THEN_SET_IRQ,
94 SI_ENABLE_INTERRUPTS1,
95 SI_ENABLE_INTERRUPTS2,
96 SI_DISABLE_INTERRUPTS1,
97 SI_DISABLE_INTERRUPTS2
98 /* FIXME - add watchdog stuff. */
101 /* Some BT-specific defines we need here. */
102 #define IPMI_BT_INTMASK_REG 2
103 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
104 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
107 SI_KCS, SI_SMIC, SI_BT
109 static char *si_to_str[] = { "kcs", "smic", "bt" };
111 static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
112 "ACPI", "SMBIOS", "PCI",
113 "device-tree", "default" };
115 #define DEVICE_NAME "ipmi_si"
117 static struct platform_driver ipmi_driver = {
120 .bus = &platform_bus_type
126 * Indexes into stats[] in smi_info below.
128 enum si_stat_indexes {
130 * Number of times the driver requested a timer while an operation
133 SI_STAT_short_timeouts = 0,
136 * Number of times the driver requested a timer while nothing was in
139 SI_STAT_long_timeouts,
141 /* Number of times the interface was idle while being polled. */
144 /* Number of interrupts the driver handled. */
147 /* Number of time the driver got an ATTN from the hardware. */
150 /* Number of times the driver requested flags from the hardware. */
151 SI_STAT_flag_fetches,
153 /* Number of times the hardware didn't follow the state machine. */
156 /* Number of completed messages. */
157 SI_STAT_complete_transactions,
159 /* Number of IPMI events received from the hardware. */
162 /* Number of watchdog pretimeouts. */
163 SI_STAT_watchdog_pretimeouts,
165 /* Number of asyncronous messages received. */
166 SI_STAT_incoming_messages,
169 /* This *must* remain last, add new values above this. */
176 struct si_sm_data *si_sm;
177 struct si_sm_handlers *handlers;
178 enum si_type si_type;
181 struct list_head xmit_msgs;
182 struct list_head hp_xmit_msgs;
183 struct ipmi_smi_msg *curr_msg;
184 enum si_intf_state si_state;
187 * Used to handle the various types of I/O that can occur with
191 int (*io_setup)(struct smi_info *info);
192 void (*io_cleanup)(struct smi_info *info);
193 int (*irq_setup)(struct smi_info *info);
194 void (*irq_cleanup)(struct smi_info *info);
195 unsigned int io_size;
196 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
197 void (*addr_source_cleanup)(struct smi_info *info);
198 void *addr_source_data;
201 * Per-OEM handler, called from handle_flags(). Returns 1
202 * when handle_flags() needs to be re-run or 0 indicating it
203 * set si_state itself.
205 int (*oem_data_avail_handler)(struct smi_info *smi_info);
208 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
209 * is set to hold the flags until we are done handling everything
212 #define RECEIVE_MSG_AVAIL 0x01
213 #define EVENT_MSG_BUFFER_FULL 0x02
214 #define WDT_PRE_TIMEOUT_INT 0x08
215 #define OEM0_DATA_AVAIL 0x20
216 #define OEM1_DATA_AVAIL 0x40
217 #define OEM2_DATA_AVAIL 0x80
218 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
221 unsigned char msg_flags;
223 /* Does the BMC have an event buffer? */
224 char has_event_buffer;
227 * If set to true, this will request events the next time the
228 * state machine is idle.
233 * If true, run the state machine to completion on every send
234 * call. Generally used after a panic to make sure stuff goes
237 int run_to_completion;
239 /* The I/O port of an SI interface. */
243 * The space between start addresses of the two ports. For
244 * instance, if the first port is 0xca2 and the spacing is 4, then
245 * the second port is 0xca6.
247 unsigned int spacing;
249 /* zero if no irq; */
252 /* The timer for this si. */
253 struct timer_list si_timer;
255 /* The time (in jiffies) the last timeout occurred at. */
256 unsigned long last_timeout_jiffies;
258 /* Used to gracefully stop the timer without race conditions. */
259 atomic_t stop_operation;
262 * The driver will disable interrupts when it gets into a
263 * situation where it cannot handle messages due to lack of
264 * memory. Once that situation clears up, it will re-enable
267 int interrupt_disabled;
269 /* From the get device id response... */
270 struct ipmi_device_id device_id;
272 /* Driver model stuff. */
274 struct platform_device *pdev;
277 * True if we allocated the device, false if it came from
278 * someplace else (like PCI).
282 /* Slave address, could be reported from DMI. */
283 unsigned char slave_addr;
285 /* Counters and things for the proc filesystem. */
286 atomic_t stats[SI_NUM_STATS];
288 struct task_struct *thread;
290 struct list_head link;
291 union ipmi_smi_info_union addr_info;
294 #define smi_inc_stat(smi, stat) \
295 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
296 #define smi_get_stat(smi, stat) \
297 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
299 #define SI_MAX_PARMS 4
301 static int force_kipmid[SI_MAX_PARMS];
302 static int num_force_kipmid;
304 static int pci_registered;
307 static int pnp_registered;
310 static int of_registered;
313 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
314 static int num_max_busy_us;
316 static int unload_when_empty = 1;
318 static int add_smi(struct smi_info *smi);
319 static int try_smi_init(struct smi_info *smi);
320 static void cleanup_one_si(struct smi_info *to_clean);
322 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
323 static int register_xaction_notifier(struct notifier_block *nb)
325 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
328 static void deliver_recv_msg(struct smi_info *smi_info,
329 struct ipmi_smi_msg *msg)
331 /* Deliver the message to the upper layer with the lock
334 if (smi_info->run_to_completion) {
335 ipmi_smi_msg_received(smi_info->intf, msg);
337 spin_unlock(&(smi_info->si_lock));
338 ipmi_smi_msg_received(smi_info->intf, msg);
339 spin_lock(&(smi_info->si_lock));
343 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
345 struct ipmi_smi_msg *msg = smi_info->curr_msg;
347 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
348 cCode = IPMI_ERR_UNSPECIFIED;
349 /* else use it as is */
351 /* Make it a reponse */
352 msg->rsp[0] = msg->data[0] | 4;
353 msg->rsp[1] = msg->data[1];
357 smi_info->curr_msg = NULL;
358 deliver_recv_msg(smi_info, msg);
361 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
364 struct list_head *entry = NULL;
370 * No need to save flags, we aleady have interrupts off and we
371 * already hold the SMI lock.
373 if (!smi_info->run_to_completion)
374 spin_lock(&(smi_info->msg_lock));
376 /* Pick the high priority queue first. */
377 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
378 entry = smi_info->hp_xmit_msgs.next;
379 } else if (!list_empty(&(smi_info->xmit_msgs))) {
380 entry = smi_info->xmit_msgs.next;
384 smi_info->curr_msg = NULL;
390 smi_info->curr_msg = list_entry(entry,
395 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
397 err = atomic_notifier_call_chain(&xaction_notifier_list,
399 if (err & NOTIFY_STOP_MASK) {
400 rv = SI_SM_CALL_WITHOUT_DELAY;
403 err = smi_info->handlers->start_transaction(
405 smi_info->curr_msg->data,
406 smi_info->curr_msg->data_size);
408 return_hosed_msg(smi_info, err);
410 rv = SI_SM_CALL_WITHOUT_DELAY;
413 if (!smi_info->run_to_completion)
414 spin_unlock(&(smi_info->msg_lock));
419 static void start_enable_irq(struct smi_info *smi_info)
421 unsigned char msg[2];
424 * If we are enabling interrupts, we have to tell the
427 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
428 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
430 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
431 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
434 static void start_disable_irq(struct smi_info *smi_info)
436 unsigned char msg[2];
438 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
439 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
441 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
442 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
445 static void start_clear_flags(struct smi_info *smi_info)
447 unsigned char msg[3];
449 /* Make sure the watchdog pre-timeout flag is not set at startup. */
450 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
451 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
452 msg[2] = WDT_PRE_TIMEOUT_INT;
454 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
455 smi_info->si_state = SI_CLEARING_FLAGS;
459 * When we have a situtaion where we run out of memory and cannot
460 * allocate messages, we just leave them in the BMC and run the system
461 * polled until we can allocate some memory. Once we have some
462 * memory, we will re-enable the interrupt.
464 static inline void disable_si_irq(struct smi_info *smi_info)
466 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
467 start_disable_irq(smi_info);
468 smi_info->interrupt_disabled = 1;
469 if (!atomic_read(&smi_info->stop_operation))
470 mod_timer(&smi_info->si_timer,
471 jiffies + SI_TIMEOUT_JIFFIES);
475 static inline void enable_si_irq(struct smi_info *smi_info)
477 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
478 start_enable_irq(smi_info);
479 smi_info->interrupt_disabled = 0;
483 static void handle_flags(struct smi_info *smi_info)
486 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
487 /* Watchdog pre-timeout */
488 smi_inc_stat(smi_info, watchdog_pretimeouts);
490 start_clear_flags(smi_info);
491 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
492 spin_unlock(&(smi_info->si_lock));
493 ipmi_smi_watchdog_pretimeout(smi_info->intf);
494 spin_lock(&(smi_info->si_lock));
495 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
496 /* Messages available. */
497 smi_info->curr_msg = ipmi_alloc_smi_msg();
498 if (!smi_info->curr_msg) {
499 disable_si_irq(smi_info);
500 smi_info->si_state = SI_NORMAL;
503 enable_si_irq(smi_info);
505 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
506 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
507 smi_info->curr_msg->data_size = 2;
509 smi_info->handlers->start_transaction(
511 smi_info->curr_msg->data,
512 smi_info->curr_msg->data_size);
513 smi_info->si_state = SI_GETTING_MESSAGES;
514 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
515 /* Events available. */
516 smi_info->curr_msg = ipmi_alloc_smi_msg();
517 if (!smi_info->curr_msg) {
518 disable_si_irq(smi_info);
519 smi_info->si_state = SI_NORMAL;
522 enable_si_irq(smi_info);
524 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
525 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
526 smi_info->curr_msg->data_size = 2;
528 smi_info->handlers->start_transaction(
530 smi_info->curr_msg->data,
531 smi_info->curr_msg->data_size);
532 smi_info->si_state = SI_GETTING_EVENTS;
533 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
534 smi_info->oem_data_avail_handler) {
535 if (smi_info->oem_data_avail_handler(smi_info))
538 smi_info->si_state = SI_NORMAL;
541 static void handle_transaction_done(struct smi_info *smi_info)
543 struct ipmi_smi_msg *msg;
548 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
550 switch (smi_info->si_state) {
552 if (!smi_info->curr_msg)
555 smi_info->curr_msg->rsp_size
556 = smi_info->handlers->get_result(
558 smi_info->curr_msg->rsp,
559 IPMI_MAX_MSG_LENGTH);
562 * Do this here becase deliver_recv_msg() releases the
563 * lock, and a new message can be put in during the
564 * time the lock is released.
566 msg = smi_info->curr_msg;
567 smi_info->curr_msg = NULL;
568 deliver_recv_msg(smi_info, msg);
571 case SI_GETTING_FLAGS:
573 unsigned char msg[4];
576 /* We got the flags from the SMI, now handle them. */
577 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
579 /* Error fetching flags, just give up for now. */
580 smi_info->si_state = SI_NORMAL;
581 } else if (len < 4) {
583 * Hmm, no flags. That's technically illegal, but
584 * don't use uninitialized data.
586 smi_info->si_state = SI_NORMAL;
588 smi_info->msg_flags = msg[3];
589 handle_flags(smi_info);
594 case SI_CLEARING_FLAGS:
595 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
597 unsigned char msg[3];
599 /* We cleared the flags. */
600 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
602 /* Error clearing flags */
603 dev_warn(smi_info->dev,
604 "Error clearing flags: %2.2x\n", msg[2]);
606 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
607 start_enable_irq(smi_info);
609 smi_info->si_state = SI_NORMAL;
613 case SI_GETTING_EVENTS:
615 smi_info->curr_msg->rsp_size
616 = smi_info->handlers->get_result(
618 smi_info->curr_msg->rsp,
619 IPMI_MAX_MSG_LENGTH);
622 * Do this here becase deliver_recv_msg() releases the
623 * lock, and a new message can be put in during the
624 * time the lock is released.
626 msg = smi_info->curr_msg;
627 smi_info->curr_msg = NULL;
628 if (msg->rsp[2] != 0) {
629 /* Error getting event, probably done. */
632 /* Take off the event flag. */
633 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
634 handle_flags(smi_info);
636 smi_inc_stat(smi_info, events);
639 * Do this before we deliver the message
640 * because delivering the message releases the
641 * lock and something else can mess with the
644 handle_flags(smi_info);
646 deliver_recv_msg(smi_info, msg);
651 case SI_GETTING_MESSAGES:
653 smi_info->curr_msg->rsp_size
654 = smi_info->handlers->get_result(
656 smi_info->curr_msg->rsp,
657 IPMI_MAX_MSG_LENGTH);
660 * Do this here becase deliver_recv_msg() releases the
661 * lock, and a new message can be put in during the
662 * time the lock is released.
664 msg = smi_info->curr_msg;
665 smi_info->curr_msg = NULL;
666 if (msg->rsp[2] != 0) {
667 /* Error getting event, probably done. */
670 /* Take off the msg flag. */
671 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
672 handle_flags(smi_info);
674 smi_inc_stat(smi_info, incoming_messages);
677 * Do this before we deliver the message
678 * because delivering the message releases the
679 * lock and something else can mess with the
682 handle_flags(smi_info);
684 deliver_recv_msg(smi_info, msg);
689 case SI_ENABLE_INTERRUPTS1:
691 unsigned char msg[4];
693 /* We got the flags from the SMI, now handle them. */
694 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
696 dev_warn(smi_info->dev, "Could not enable interrupts"
697 ", failed get, using polled mode.\n");
698 smi_info->si_state = SI_NORMAL;
700 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
701 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
703 IPMI_BMC_RCV_MSG_INTR |
704 IPMI_BMC_EVT_MSG_INTR);
705 smi_info->handlers->start_transaction(
706 smi_info->si_sm, msg, 3);
707 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
712 case SI_ENABLE_INTERRUPTS2:
714 unsigned char msg[4];
716 /* We got the flags from the SMI, now handle them. */
717 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
719 dev_warn(smi_info->dev, "Could not enable interrupts"
720 ", failed set, using polled mode.\n");
722 smi_info->interrupt_disabled = 0;
723 smi_info->si_state = SI_NORMAL;
727 case SI_DISABLE_INTERRUPTS1:
729 unsigned char msg[4];
731 /* We got the flags from the SMI, now handle them. */
732 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
734 dev_warn(smi_info->dev, "Could not disable interrupts"
736 smi_info->si_state = SI_NORMAL;
738 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
739 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
741 ~(IPMI_BMC_RCV_MSG_INTR |
742 IPMI_BMC_EVT_MSG_INTR));
743 smi_info->handlers->start_transaction(
744 smi_info->si_sm, msg, 3);
745 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
750 case SI_DISABLE_INTERRUPTS2:
752 unsigned char msg[4];
754 /* We got the flags from the SMI, now handle them. */
755 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
757 dev_warn(smi_info->dev, "Could not disable interrupts"
760 smi_info->si_state = SI_NORMAL;
767 * Called on timeouts and events. Timeouts should pass the elapsed
768 * time, interrupts should pass in zero. Must be called with
769 * si_lock held and interrupts disabled.
771 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
774 enum si_sm_result si_sm_result;
778 * There used to be a loop here that waited a little while
779 * (around 25us) before giving up. That turned out to be
780 * pointless, the minimum delays I was seeing were in the 300us
781 * range, which is far too long to wait in an interrupt. So
782 * we just run until the state machine tells us something
783 * happened or it needs a delay.
785 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
787 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
788 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
790 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
791 smi_inc_stat(smi_info, complete_transactions);
793 handle_transaction_done(smi_info);
794 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
795 } else if (si_sm_result == SI_SM_HOSED) {
796 smi_inc_stat(smi_info, hosed_count);
799 * Do the before return_hosed_msg, because that
802 smi_info->si_state = SI_NORMAL;
803 if (smi_info->curr_msg != NULL) {
805 * If we were handling a user message, format
806 * a response to send to the upper layer to
807 * tell it about the error.
809 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
811 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
815 * We prefer handling attn over new messages. But don't do
816 * this if there is not yet an upper layer to handle anything.
818 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
819 unsigned char msg[2];
821 smi_inc_stat(smi_info, attentions);
824 * Got a attn, send down a get message flags to see
825 * what's causing it. It would be better to handle
826 * this in the upper layer, but due to the way
827 * interrupts work with the SMI, that's not really
830 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
831 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
833 smi_info->handlers->start_transaction(
834 smi_info->si_sm, msg, 2);
835 smi_info->si_state = SI_GETTING_FLAGS;
839 /* If we are currently idle, try to start the next message. */
840 if (si_sm_result == SI_SM_IDLE) {
841 smi_inc_stat(smi_info, idles);
843 si_sm_result = start_next_msg(smi_info);
844 if (si_sm_result != SI_SM_IDLE)
848 if ((si_sm_result == SI_SM_IDLE)
849 && (atomic_read(&smi_info->req_events))) {
851 * We are idle and the upper layer requested that I fetch
854 atomic_set(&smi_info->req_events, 0);
856 smi_info->curr_msg = ipmi_alloc_smi_msg();
857 if (!smi_info->curr_msg)
860 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
861 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
862 smi_info->curr_msg->data_size = 2;
864 smi_info->handlers->start_transaction(
866 smi_info->curr_msg->data,
867 smi_info->curr_msg->data_size);
868 smi_info->si_state = SI_GETTING_EVENTS;
875 static void sender(void *send_info,
876 struct ipmi_smi_msg *msg,
879 struct smi_info *smi_info = send_info;
880 enum si_sm_result result;
886 if (atomic_read(&smi_info->stop_operation)) {
887 msg->rsp[0] = msg->data[0] | 4;
888 msg->rsp[1] = msg->data[1];
889 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
891 deliver_recv_msg(smi_info, msg);
897 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
900 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
902 if (smi_info->thread)
903 wake_up_process(smi_info->thread);
905 if (smi_info->run_to_completion) {
907 * If we are running to completion, then throw it in
908 * the list and run transactions until everything is
909 * clear. Priority doesn't matter here.
913 * Run to completion means we are single-threaded, no
916 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
918 result = smi_event_handler(smi_info, 0);
919 while (result != SI_SM_IDLE) {
920 udelay(SI_SHORT_TIMEOUT_USEC);
921 result = smi_event_handler(smi_info,
922 SI_SHORT_TIMEOUT_USEC);
927 spin_lock_irqsave(&smi_info->msg_lock, flags);
929 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
931 list_add_tail(&msg->link, &smi_info->xmit_msgs);
932 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
934 spin_lock_irqsave(&smi_info->si_lock, flags);
935 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
936 start_next_msg(smi_info);
937 spin_unlock_irqrestore(&smi_info->si_lock, flags);
940 static void set_run_to_completion(void *send_info, int i_run_to_completion)
942 struct smi_info *smi_info = send_info;
943 enum si_sm_result result;
945 smi_info->run_to_completion = i_run_to_completion;
946 if (i_run_to_completion) {
947 result = smi_event_handler(smi_info, 0);
948 while (result != SI_SM_IDLE) {
949 udelay(SI_SHORT_TIMEOUT_USEC);
950 result = smi_event_handler(smi_info,
951 SI_SHORT_TIMEOUT_USEC);
957 * Use -1 in the nsec value of the busy waiting timespec to tell that
958 * we are spinning in kipmid looking for something and not delaying
961 static inline void ipmi_si_set_not_busy(struct timespec *ts)
965 static inline int ipmi_si_is_busy(struct timespec *ts)
967 return ts->tv_nsec != -1;
970 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
971 const struct smi_info *smi_info,
972 struct timespec *busy_until)
974 unsigned int max_busy_us = 0;
976 if (smi_info->intf_num < num_max_busy_us)
977 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
978 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
979 ipmi_si_set_not_busy(busy_until);
980 else if (!ipmi_si_is_busy(busy_until)) {
981 getnstimeofday(busy_until);
982 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
985 getnstimeofday(&now);
986 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
987 ipmi_si_set_not_busy(busy_until);
996 * A busy-waiting loop for speeding up IPMI operation.
998 * Lousy hardware makes this hard. This is only enabled for systems
999 * that are not BT and do not have interrupts. It starts spinning
1000 * when an operation is complete or until max_busy tells it to stop
1001 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1002 * Documentation/IPMI.txt for details.
1004 static int ipmi_thread(void *data)
1006 struct smi_info *smi_info = data;
1007 unsigned long flags;
1008 enum si_sm_result smi_result;
1009 struct timespec busy_until;
1011 ipmi_si_set_not_busy(&busy_until);
1012 set_user_nice(current, 19);
1013 while (!kthread_should_stop()) {
1016 spin_lock_irqsave(&(smi_info->si_lock), flags);
1017 smi_result = smi_event_handler(smi_info, 0);
1018 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1019 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1021 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1023 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1025 else if (smi_result == SI_SM_IDLE)
1026 schedule_timeout_interruptible(100);
1028 schedule_timeout_interruptible(1);
1034 static void poll(void *send_info)
1036 struct smi_info *smi_info = send_info;
1037 unsigned long flags;
1040 * Make sure there is some delay in the poll loop so we can
1041 * drive time forward and timeout things.
1044 spin_lock_irqsave(&smi_info->si_lock, flags);
1045 smi_event_handler(smi_info, 10);
1046 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1049 static void request_events(void *send_info)
1051 struct smi_info *smi_info = send_info;
1053 if (atomic_read(&smi_info->stop_operation) ||
1054 !smi_info->has_event_buffer)
1057 atomic_set(&smi_info->req_events, 1);
1060 static int initialized;
1062 static void smi_timeout(unsigned long data)
1064 struct smi_info *smi_info = (struct smi_info *) data;
1065 enum si_sm_result smi_result;
1066 unsigned long flags;
1067 unsigned long jiffies_now;
1074 spin_lock_irqsave(&(smi_info->si_lock), flags);
1076 do_gettimeofday(&t);
1077 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1079 jiffies_now = jiffies;
1080 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1081 * SI_USEC_PER_JIFFY);
1082 smi_result = smi_event_handler(smi_info, time_diff);
1084 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1086 smi_info->last_timeout_jiffies = jiffies_now;
1088 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1089 /* Running with interrupts, only do long timeouts. */
1090 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1091 smi_inc_stat(smi_info, long_timeouts);
1096 * If the state machine asks for a short delay, then shorten
1097 * the timer timeout.
1099 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1100 smi_inc_stat(smi_info, short_timeouts);
1101 timeout = jiffies + 1;
1103 smi_inc_stat(smi_info, long_timeouts);
1104 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1108 if (smi_result != SI_SM_IDLE)
1109 mod_timer(&(smi_info->si_timer), timeout);
1112 static irqreturn_t si_irq_handler(int irq, void *data)
1114 struct smi_info *smi_info = data;
1115 unsigned long flags;
1120 spin_lock_irqsave(&(smi_info->si_lock), flags);
1122 smi_inc_stat(smi_info, interrupts);
1125 do_gettimeofday(&t);
1126 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1128 smi_event_handler(smi_info, 0);
1129 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1133 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1135 struct smi_info *smi_info = data;
1136 /* We need to clear the IRQ flag for the BT interface. */
1137 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1138 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1139 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1140 return si_irq_handler(irq, data);
1143 static int smi_start_processing(void *send_info,
1146 struct smi_info *new_smi = send_info;
1149 new_smi->intf = intf;
1151 /* Try to claim any interrupts. */
1152 if (new_smi->irq_setup)
1153 new_smi->irq_setup(new_smi);
1155 /* Set up the timer that drives the interface. */
1156 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1157 new_smi->last_timeout_jiffies = jiffies;
1158 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1161 * Check if the user forcefully enabled the daemon.
1163 if (new_smi->intf_num < num_force_kipmid)
1164 enable = force_kipmid[new_smi->intf_num];
1166 * The BT interface is efficient enough to not need a thread,
1167 * and there is no need for a thread if we have interrupts.
1169 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1173 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1174 "kipmi%d", new_smi->intf_num);
1175 if (IS_ERR(new_smi->thread)) {
1176 dev_notice(new_smi->dev, "Could not start"
1177 " kernel thread due to error %ld, only using"
1178 " timers to drive the interface\n",
1179 PTR_ERR(new_smi->thread));
1180 new_smi->thread = NULL;
1187 static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1189 struct smi_info *smi = send_info;
1191 data->addr_src = smi->addr_source;
1192 data->dev = smi->dev;
1193 data->addr_info = smi->addr_info;
1194 get_device(smi->dev);
1199 static void set_maintenance_mode(void *send_info, int enable)
1201 struct smi_info *smi_info = send_info;
1204 atomic_set(&smi_info->req_events, 0);
1207 static struct ipmi_smi_handlers handlers = {
1208 .owner = THIS_MODULE,
1209 .start_processing = smi_start_processing,
1210 .get_smi_info = get_smi_info,
1212 .request_events = request_events,
1213 .set_maintenance_mode = set_maintenance_mode,
1214 .set_run_to_completion = set_run_to_completion,
1219 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1220 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1223 static LIST_HEAD(smi_infos);
1224 static DEFINE_MUTEX(smi_infos_lock);
1225 static int smi_num; /* Used to sequence the SMIs */
1227 #define DEFAULT_REGSPACING 1
1228 #define DEFAULT_REGSIZE 1
1230 static int si_trydefaults = 1;
1231 static char *si_type[SI_MAX_PARMS];
1232 #define MAX_SI_TYPE_STR 30
1233 static char si_type_str[MAX_SI_TYPE_STR];
1234 static unsigned long addrs[SI_MAX_PARMS];
1235 static unsigned int num_addrs;
1236 static unsigned int ports[SI_MAX_PARMS];
1237 static unsigned int num_ports;
1238 static int irqs[SI_MAX_PARMS];
1239 static unsigned int num_irqs;
1240 static int regspacings[SI_MAX_PARMS];
1241 static unsigned int num_regspacings;
1242 static int regsizes[SI_MAX_PARMS];
1243 static unsigned int num_regsizes;
1244 static int regshifts[SI_MAX_PARMS];
1245 static unsigned int num_regshifts;
1246 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1247 static unsigned int num_slave_addrs;
1249 #define IPMI_IO_ADDR_SPACE 0
1250 #define IPMI_MEM_ADDR_SPACE 1
1251 static char *addr_space_to_str[] = { "i/o", "mem" };
1253 static int hotmod_handler(const char *val, struct kernel_param *kp);
1255 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1256 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1257 " Documentation/IPMI.txt in the kernel sources for the"
1260 module_param_named(trydefaults, si_trydefaults, bool, 0);
1261 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1262 " default scan of the KCS and SMIC interface at the standard"
1264 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1265 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1266 " interface separated by commas. The types are 'kcs',"
1267 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1268 " the first interface to kcs and the second to bt");
1269 module_param_array(addrs, ulong, &num_addrs, 0);
1270 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1271 " addresses separated by commas. Only use if an interface"
1272 " is in memory. Otherwise, set it to zero or leave"
1274 module_param_array(ports, uint, &num_ports, 0);
1275 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1276 " addresses separated by commas. Only use if an interface"
1277 " is a port. Otherwise, set it to zero or leave"
1279 module_param_array(irqs, int, &num_irqs, 0);
1280 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1281 " addresses separated by commas. Only use if an interface"
1282 " has an interrupt. Otherwise, set it to zero or leave"
1284 module_param_array(regspacings, int, &num_regspacings, 0);
1285 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1286 " and each successive register used by the interface. For"
1287 " instance, if the start address is 0xca2 and the spacing"
1288 " is 2, then the second address is at 0xca4. Defaults"
1290 module_param_array(regsizes, int, &num_regsizes, 0);
1291 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1292 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1293 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1294 " the 8-bit IPMI register has to be read from a larger"
1296 module_param_array(regshifts, int, &num_regshifts, 0);
1297 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1298 " IPMI register, in bits. For instance, if the data"
1299 " is read from a 32-bit word and the IPMI data is in"
1300 " bit 8-15, then the shift would be 8");
1301 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1302 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1303 " the controller. Normally this is 0x20, but can be"
1304 " overridden by this parm. This is an array indexed"
1305 " by interface number.");
1306 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1307 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1308 " disabled(0). Normally the IPMI driver auto-detects"
1309 " this, but the value may be overridden by this parm.");
1310 module_param(unload_when_empty, int, 0);
1311 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1312 " specified or found, default is 1. Setting to 0"
1313 " is useful for hot add of devices using hotmod.");
1314 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1315 MODULE_PARM_DESC(kipmid_max_busy_us,
1316 "Max time (in microseconds) to busy-wait for IPMI data before"
1317 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1318 " if kipmid is using up a lot of CPU time.");
1321 static void std_irq_cleanup(struct smi_info *info)
1323 if (info->si_type == SI_BT)
1324 /* Disable the interrupt in the BT interface. */
1325 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1326 free_irq(info->irq, info);
1329 static int std_irq_setup(struct smi_info *info)
1336 if (info->si_type == SI_BT) {
1337 rv = request_irq(info->irq,
1339 IRQF_SHARED | IRQF_DISABLED,
1343 /* Enable the interrupt in the BT interface. */
1344 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1345 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1347 rv = request_irq(info->irq,
1349 IRQF_SHARED | IRQF_DISABLED,
1353 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1354 " running polled\n",
1355 DEVICE_NAME, info->irq);
1358 info->irq_cleanup = std_irq_cleanup;
1359 dev_info(info->dev, "Using irq %d\n", info->irq);
1365 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1367 unsigned int addr = io->addr_data;
1369 return inb(addr + (offset * io->regspacing));
1372 static void port_outb(struct si_sm_io *io, unsigned int offset,
1375 unsigned int addr = io->addr_data;
1377 outb(b, addr + (offset * io->regspacing));
1380 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1382 unsigned int addr = io->addr_data;
1384 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1387 static void port_outw(struct si_sm_io *io, unsigned int offset,
1390 unsigned int addr = io->addr_data;
1392 outw(b << io->regshift, addr + (offset * io->regspacing));
1395 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1397 unsigned int addr = io->addr_data;
1399 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1402 static void port_outl(struct si_sm_io *io, unsigned int offset,
1405 unsigned int addr = io->addr_data;
1407 outl(b << io->regshift, addr+(offset * io->regspacing));
1410 static void port_cleanup(struct smi_info *info)
1412 unsigned int addr = info->io.addr_data;
1416 for (idx = 0; idx < info->io_size; idx++)
1417 release_region(addr + idx * info->io.regspacing,
1422 static int port_setup(struct smi_info *info)
1424 unsigned int addr = info->io.addr_data;
1430 info->io_cleanup = port_cleanup;
1433 * Figure out the actual inb/inw/inl/etc routine to use based
1434 * upon the register size.
1436 switch (info->io.regsize) {
1438 info->io.inputb = port_inb;
1439 info->io.outputb = port_outb;
1442 info->io.inputb = port_inw;
1443 info->io.outputb = port_outw;
1446 info->io.inputb = port_inl;
1447 info->io.outputb = port_outl;
1450 dev_warn(info->dev, "Invalid register size: %d\n",
1456 * Some BIOSes reserve disjoint I/O regions in their ACPI
1457 * tables. This causes problems when trying to register the
1458 * entire I/O region. Therefore we must register each I/O
1461 for (idx = 0; idx < info->io_size; idx++) {
1462 if (request_region(addr + idx * info->io.regspacing,
1463 info->io.regsize, DEVICE_NAME) == NULL) {
1464 /* Undo allocations */
1466 release_region(addr + idx * info->io.regspacing,
1475 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1477 return readb((io->addr)+(offset * io->regspacing));
1480 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1483 writeb(b, (io->addr)+(offset * io->regspacing));
1486 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1488 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1492 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1495 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1498 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1500 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1504 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1507 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1511 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1513 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1517 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1520 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1524 static void mem_cleanup(struct smi_info *info)
1526 unsigned long addr = info->io.addr_data;
1529 if (info->io.addr) {
1530 iounmap(info->io.addr);
1532 mapsize = ((info->io_size * info->io.regspacing)
1533 - (info->io.regspacing - info->io.regsize));
1535 release_mem_region(addr, mapsize);
1539 static int mem_setup(struct smi_info *info)
1541 unsigned long addr = info->io.addr_data;
1547 info->io_cleanup = mem_cleanup;
1550 * Figure out the actual readb/readw/readl/etc routine to use based
1551 * upon the register size.
1553 switch (info->io.regsize) {
1555 info->io.inputb = intf_mem_inb;
1556 info->io.outputb = intf_mem_outb;
1559 info->io.inputb = intf_mem_inw;
1560 info->io.outputb = intf_mem_outw;
1563 info->io.inputb = intf_mem_inl;
1564 info->io.outputb = intf_mem_outl;
1568 info->io.inputb = mem_inq;
1569 info->io.outputb = mem_outq;
1573 dev_warn(info->dev, "Invalid register size: %d\n",
1579 * Calculate the total amount of memory to claim. This is an
1580 * unusual looking calculation, but it avoids claiming any
1581 * more memory than it has to. It will claim everything
1582 * between the first address to the end of the last full
1585 mapsize = ((info->io_size * info->io.regspacing)
1586 - (info->io.regspacing - info->io.regsize));
1588 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1591 info->io.addr = ioremap(addr, mapsize);
1592 if (info->io.addr == NULL) {
1593 release_mem_region(addr, mapsize);
1600 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1601 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1609 enum hotmod_op { HM_ADD, HM_REMOVE };
1610 struct hotmod_vals {
1614 static struct hotmod_vals hotmod_ops[] = {
1616 { "remove", HM_REMOVE },
1619 static struct hotmod_vals hotmod_si[] = {
1621 { "smic", SI_SMIC },
1625 static struct hotmod_vals hotmod_as[] = {
1626 { "mem", IPMI_MEM_ADDR_SPACE },
1627 { "i/o", IPMI_IO_ADDR_SPACE },
1631 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1636 s = strchr(*curr, ',');
1638 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1643 for (i = 0; hotmod_ops[i].name; i++) {
1644 if (strcmp(*curr, v[i].name) == 0) {
1651 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1655 static int check_hotmod_int_op(const char *curr, const char *option,
1656 const char *name, int *val)
1660 if (strcmp(curr, name) == 0) {
1662 printk(KERN_WARNING PFX
1663 "No option given for '%s'\n",
1667 *val = simple_strtoul(option, &n, 0);
1668 if ((*n != '\0') || (*option == '\0')) {
1669 printk(KERN_WARNING PFX
1670 "Bad option given for '%s'\n",
1679 static struct smi_info *smi_info_alloc(void)
1681 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1684 spin_lock_init(&info->si_lock);
1685 spin_lock_init(&info->msg_lock);
1690 static int hotmod_handler(const char *val, struct kernel_param *kp)
1692 char *str = kstrdup(val, GFP_KERNEL);
1694 char *next, *curr, *s, *n, *o;
1696 enum si_type si_type;
1706 struct smi_info *info;
1711 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1714 while ((ival >= 0) && isspace(str[ival])) {
1719 for (curr = str; curr; curr = next) {
1724 ipmb = 0; /* Choose the default if not specified */
1726 next = strchr(curr, ':');
1732 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1737 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1742 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1746 s = strchr(curr, ',');
1751 addr = simple_strtoul(curr, &n, 0);
1752 if ((*n != '\0') || (*curr == '\0')) {
1753 printk(KERN_WARNING PFX "Invalid hotmod address"
1760 s = strchr(curr, ',');
1765 o = strchr(curr, '=');
1770 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1775 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1780 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1785 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1790 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1797 printk(KERN_WARNING PFX
1798 "Invalid hotmod option '%s'\n",
1804 info = smi_info_alloc();
1810 info->addr_source = SI_HOTMOD;
1811 info->si_type = si_type;
1812 info->io.addr_data = addr;
1813 info->io.addr_type = addr_space;
1814 if (addr_space == IPMI_MEM_ADDR_SPACE)
1815 info->io_setup = mem_setup;
1817 info->io_setup = port_setup;
1819 info->io.addr = NULL;
1820 info->io.regspacing = regspacing;
1821 if (!info->io.regspacing)
1822 info->io.regspacing = DEFAULT_REGSPACING;
1823 info->io.regsize = regsize;
1824 if (!info->io.regsize)
1825 info->io.regsize = DEFAULT_REGSPACING;
1826 info->io.regshift = regshift;
1829 info->irq_setup = std_irq_setup;
1830 info->slave_addr = ipmb;
1832 if (!add_smi(info)) {
1833 if (try_smi_init(info))
1834 cleanup_one_si(info);
1840 struct smi_info *e, *tmp_e;
1842 mutex_lock(&smi_infos_lock);
1843 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1844 if (e->io.addr_type != addr_space)
1846 if (e->si_type != si_type)
1848 if (e->io.addr_data == addr)
1851 mutex_unlock(&smi_infos_lock);
1860 static void __devinit hardcode_find_bmc(void)
1863 struct smi_info *info;
1865 for (i = 0; i < SI_MAX_PARMS; i++) {
1866 if (!ports[i] && !addrs[i])
1869 info = smi_info_alloc();
1873 info->addr_source = SI_HARDCODED;
1874 printk(KERN_INFO PFX "probing via hardcoded address\n");
1876 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1877 info->si_type = SI_KCS;
1878 } else if (strcmp(si_type[i], "smic") == 0) {
1879 info->si_type = SI_SMIC;
1880 } else if (strcmp(si_type[i], "bt") == 0) {
1881 info->si_type = SI_BT;
1883 printk(KERN_WARNING PFX "Interface type specified "
1884 "for interface %d, was invalid: %s\n",
1892 info->io_setup = port_setup;
1893 info->io.addr_data = ports[i];
1894 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1895 } else if (addrs[i]) {
1897 info->io_setup = mem_setup;
1898 info->io.addr_data = addrs[i];
1899 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1901 printk(KERN_WARNING PFX "Interface type specified "
1902 "for interface %d, but port and address were "
1903 "not set or set to zero.\n", i);
1908 info->io.addr = NULL;
1909 info->io.regspacing = regspacings[i];
1910 if (!info->io.regspacing)
1911 info->io.regspacing = DEFAULT_REGSPACING;
1912 info->io.regsize = regsizes[i];
1913 if (!info->io.regsize)
1914 info->io.regsize = DEFAULT_REGSPACING;
1915 info->io.regshift = regshifts[i];
1916 info->irq = irqs[i];
1918 info->irq_setup = std_irq_setup;
1919 info->slave_addr = slave_addrs[i];
1921 if (!add_smi(info)) {
1922 if (try_smi_init(info))
1923 cleanup_one_si(info);
1932 #include <linux/acpi.h>
1935 * Once we get an ACPI failure, we don't try any more, because we go
1936 * through the tables sequentially. Once we don't find a table, there
1939 static int acpi_failure;
1941 /* For GPE-type interrupts. */
1942 static u32 ipmi_acpi_gpe(void *context)
1944 struct smi_info *smi_info = context;
1945 unsigned long flags;
1950 spin_lock_irqsave(&(smi_info->si_lock), flags);
1952 smi_inc_stat(smi_info, interrupts);
1955 do_gettimeofday(&t);
1956 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1958 smi_event_handler(smi_info, 0);
1959 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1961 return ACPI_INTERRUPT_HANDLED;
1964 static void acpi_gpe_irq_cleanup(struct smi_info *info)
1969 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1972 static int acpi_gpe_irq_setup(struct smi_info *info)
1979 /* FIXME - is level triggered right? */
1980 status = acpi_install_gpe_handler(NULL,
1982 ACPI_GPE_LEVEL_TRIGGERED,
1985 if (status != AE_OK) {
1986 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1987 " running polled\n", DEVICE_NAME, info->irq);
1991 info->irq_cleanup = acpi_gpe_irq_cleanup;
1992 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
1999 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2010 s8 CreatorRevision[4];
2013 s16 SpecificationRevision;
2016 * Bit 0 - SCI interrupt supported
2017 * Bit 1 - I/O APIC/SAPIC
2022 * If bit 0 of InterruptType is set, then this is the SCI
2023 * interrupt in the GPEx_STS register.
2030 * If bit 1 of InterruptType is set, then this is the I/O
2031 * APIC/SAPIC interrupt.
2033 u32 GlobalSystemInterrupt;
2035 /* The actual register address. */
2036 struct acpi_generic_address addr;
2040 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2043 static int __devinit try_init_spmi(struct SPMITable *spmi)
2045 struct smi_info *info;
2047 if (spmi->IPMIlegacy != 1) {
2048 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2052 info = smi_info_alloc();
2054 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2058 info->addr_source = SI_SPMI;
2059 printk(KERN_INFO PFX "probing via SPMI\n");
2061 /* Figure out the interface type. */
2062 switch (spmi->InterfaceType) {
2064 info->si_type = SI_KCS;
2067 info->si_type = SI_SMIC;
2070 info->si_type = SI_BT;
2073 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2074 spmi->InterfaceType);
2079 if (spmi->InterruptType & 1) {
2080 /* We've got a GPE interrupt. */
2081 info->irq = spmi->GPE;
2082 info->irq_setup = acpi_gpe_irq_setup;
2083 } else if (spmi->InterruptType & 2) {
2084 /* We've got an APIC/SAPIC interrupt. */
2085 info->irq = spmi->GlobalSystemInterrupt;
2086 info->irq_setup = std_irq_setup;
2088 /* Use the default interrupt setting. */
2090 info->irq_setup = NULL;
2093 if (spmi->addr.bit_width) {
2094 /* A (hopefully) properly formed register bit width. */
2095 info->io.regspacing = spmi->addr.bit_width / 8;
2097 info->io.regspacing = DEFAULT_REGSPACING;
2099 info->io.regsize = info->io.regspacing;
2100 info->io.regshift = spmi->addr.bit_offset;
2102 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2103 info->io_setup = mem_setup;
2104 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2105 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2106 info->io_setup = port_setup;
2107 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2110 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2113 info->io.addr_data = spmi->addr.address;
2115 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2116 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2117 info->io.addr_data, info->io.regsize, info->io.regspacing,
2126 static void __devinit spmi_find_bmc(void)
2129 struct SPMITable *spmi;
2138 for (i = 0; ; i++) {
2139 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2140 (struct acpi_table_header **)&spmi);
2141 if (status != AE_OK)
2144 try_init_spmi(spmi);
2148 static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2149 const struct pnp_device_id *dev_id)
2151 struct acpi_device *acpi_dev;
2152 struct smi_info *info;
2153 struct resource *res, *res_second;
2156 unsigned long long tmp;
2158 acpi_dev = pnp_acpi_device(dev);
2162 info = smi_info_alloc();
2166 info->addr_source = SI_ACPI;
2167 printk(KERN_INFO PFX "probing via ACPI\n");
2169 handle = acpi_dev->handle;
2170 info->addr_info.acpi_info.acpi_handle = handle;
2172 /* _IFT tells us the interface type: KCS, BT, etc */
2173 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2174 if (ACPI_FAILURE(status))
2179 info->si_type = SI_KCS;
2182 info->si_type = SI_SMIC;
2185 info->si_type = SI_BT;
2188 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2192 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2194 info->io_setup = port_setup;
2195 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2197 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2199 info->io_setup = mem_setup;
2200 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2204 dev_err(&dev->dev, "no I/O or memory address\n");
2207 info->io.addr_data = res->start;
2209 info->io.regspacing = DEFAULT_REGSPACING;
2210 res_second = pnp_get_resource(dev,
2211 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2212 IORESOURCE_IO : IORESOURCE_MEM,
2215 if (res_second->start > info->io.addr_data)
2216 info->io.regspacing = res_second->start - info->io.addr_data;
2218 info->io.regsize = DEFAULT_REGSPACING;
2219 info->io.regshift = 0;
2221 /* If _GPE exists, use it; otherwise use standard interrupts */
2222 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2223 if (ACPI_SUCCESS(status)) {
2225 info->irq_setup = acpi_gpe_irq_setup;
2226 } else if (pnp_irq_valid(dev, 0)) {
2227 info->irq = pnp_irq(dev, 0);
2228 info->irq_setup = std_irq_setup;
2231 info->dev = &dev->dev;
2232 pnp_set_drvdata(dev, info);
2234 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2235 res, info->io.regsize, info->io.regspacing,
2248 static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2250 struct smi_info *info = pnp_get_drvdata(dev);
2252 cleanup_one_si(info);
2255 static const struct pnp_device_id pnp_dev_table[] = {
2260 static struct pnp_driver ipmi_pnp_driver = {
2261 .name = DEVICE_NAME,
2262 .probe = ipmi_pnp_probe,
2263 .remove = __devexit_p(ipmi_pnp_remove),
2264 .id_table = pnp_dev_table,
2269 struct dmi_ipmi_data {
2272 unsigned long base_addr;
2278 static int __devinit decode_dmi(const struct dmi_header *dm,
2279 struct dmi_ipmi_data *dmi)
2281 const u8 *data = (const u8 *)dm;
2282 unsigned long base_addr;
2284 u8 len = dm->length;
2286 dmi->type = data[4];
2288 memcpy(&base_addr, data+8, sizeof(unsigned long));
2290 if (base_addr & 1) {
2292 base_addr &= 0xFFFE;
2293 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2296 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2298 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2300 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2302 dmi->irq = data[0x11];
2304 /* The top two bits of byte 0x10 hold the register spacing. */
2305 reg_spacing = (data[0x10] & 0xC0) >> 6;
2306 switch (reg_spacing) {
2307 case 0x00: /* Byte boundaries */
2310 case 0x01: /* 32-bit boundaries */
2313 case 0x02: /* 16-byte boundaries */
2317 /* Some other interface, just ignore it. */
2323 * Note that technically, the lower bit of the base
2324 * address should be 1 if the address is I/O and 0 if
2325 * the address is in memory. So many systems get that
2326 * wrong (and all that I have seen are I/O) so we just
2327 * ignore that bit and assume I/O. Systems that use
2328 * memory should use the newer spec, anyway.
2330 dmi->base_addr = base_addr & 0xfffe;
2331 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2335 dmi->slave_addr = data[6];
2340 static void __devinit try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2342 struct smi_info *info;
2344 info = smi_info_alloc();
2346 printk(KERN_ERR PFX "Could not allocate SI data\n");
2350 info->addr_source = SI_SMBIOS;
2351 printk(KERN_INFO PFX "probing via SMBIOS\n");
2353 switch (ipmi_data->type) {
2354 case 0x01: /* KCS */
2355 info->si_type = SI_KCS;
2357 case 0x02: /* SMIC */
2358 info->si_type = SI_SMIC;
2361 info->si_type = SI_BT;
2368 switch (ipmi_data->addr_space) {
2369 case IPMI_MEM_ADDR_SPACE:
2370 info->io_setup = mem_setup;
2371 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2374 case IPMI_IO_ADDR_SPACE:
2375 info->io_setup = port_setup;
2376 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2381 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2382 ipmi_data->addr_space);
2385 info->io.addr_data = ipmi_data->base_addr;
2387 info->io.regspacing = ipmi_data->offset;
2388 if (!info->io.regspacing)
2389 info->io.regspacing = DEFAULT_REGSPACING;
2390 info->io.regsize = DEFAULT_REGSPACING;
2391 info->io.regshift = 0;
2393 info->slave_addr = ipmi_data->slave_addr;
2395 info->irq = ipmi_data->irq;
2397 info->irq_setup = std_irq_setup;
2399 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2400 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2401 info->io.addr_data, info->io.regsize, info->io.regspacing,
2408 static void __devinit dmi_find_bmc(void)
2410 const struct dmi_device *dev = NULL;
2411 struct dmi_ipmi_data data;
2414 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2415 memset(&data, 0, sizeof(data));
2416 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2419 try_init_dmi(&data);
2422 #endif /* CONFIG_DMI */
2426 #define PCI_ERMC_CLASSCODE 0x0C0700
2427 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2428 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2429 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2430 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2431 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2433 #define PCI_HP_VENDOR_ID 0x103C
2434 #define PCI_MMC_DEVICE_ID 0x121A
2435 #define PCI_MMC_ADDR_CW 0x10
2437 static void ipmi_pci_cleanup(struct smi_info *info)
2439 struct pci_dev *pdev = info->addr_source_data;
2441 pci_disable_device(pdev);
2444 static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2445 const struct pci_device_id *ent)
2448 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2449 struct smi_info *info;
2451 info = smi_info_alloc();
2455 info->addr_source = SI_PCI;
2456 dev_info(&pdev->dev, "probing via PCI");
2458 switch (class_type) {
2459 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2460 info->si_type = SI_SMIC;
2463 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2464 info->si_type = SI_KCS;
2467 case PCI_ERMC_CLASSCODE_TYPE_BT:
2468 info->si_type = SI_BT;
2473 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2477 rv = pci_enable_device(pdev);
2479 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2484 info->addr_source_cleanup = ipmi_pci_cleanup;
2485 info->addr_source_data = pdev;
2487 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2488 info->io_setup = port_setup;
2489 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2491 info->io_setup = mem_setup;
2492 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2494 info->io.addr_data = pci_resource_start(pdev, 0);
2496 info->io.regspacing = DEFAULT_REGSPACING;
2497 info->io.regsize = DEFAULT_REGSPACING;
2498 info->io.regshift = 0;
2500 info->irq = pdev->irq;
2502 info->irq_setup = std_irq_setup;
2504 info->dev = &pdev->dev;
2505 pci_set_drvdata(pdev, info);
2507 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2508 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2517 static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2519 struct smi_info *info = pci_get_drvdata(pdev);
2520 cleanup_one_si(info);
2524 static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2529 static int ipmi_pci_resume(struct pci_dev *pdev)
2535 static struct pci_device_id ipmi_pci_devices[] = {
2536 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2537 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2540 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2542 static struct pci_driver ipmi_pci_driver = {
2543 .name = DEVICE_NAME,
2544 .id_table = ipmi_pci_devices,
2545 .probe = ipmi_pci_probe,
2546 .remove = __devexit_p(ipmi_pci_remove),
2548 .suspend = ipmi_pci_suspend,
2549 .resume = ipmi_pci_resume,
2552 #endif /* CONFIG_PCI */
2555 #ifdef CONFIG_PPC_OF
2556 static int __devinit ipmi_of_probe(struct platform_device *dev,
2557 const struct of_device_id *match)
2559 struct smi_info *info;
2560 struct resource resource;
2561 const int *regsize, *regspacing, *regshift;
2562 struct device_node *np = dev->dev.of_node;
2566 dev_info(&dev->dev, "probing via device tree\n");
2568 ret = of_address_to_resource(np, 0, &resource);
2570 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2574 regsize = of_get_property(np, "reg-size", &proplen);
2575 if (regsize && proplen != 4) {
2576 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2580 regspacing = of_get_property(np, "reg-spacing", &proplen);
2581 if (regspacing && proplen != 4) {
2582 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2586 regshift = of_get_property(np, "reg-shift", &proplen);
2587 if (regshift && proplen != 4) {
2588 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2592 info = smi_info_alloc();
2596 "could not allocate memory for OF probe\n");
2600 info->si_type = (enum si_type) match->data;
2601 info->addr_source = SI_DEVICETREE;
2602 info->irq_setup = std_irq_setup;
2604 if (resource.flags & IORESOURCE_IO) {
2605 info->io_setup = port_setup;
2606 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2608 info->io_setup = mem_setup;
2609 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2612 info->io.addr_data = resource.start;
2614 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE;
2615 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING;
2616 info->io.regshift = regshift ? *regshift : 0;
2618 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2619 info->dev = &dev->dev;
2621 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2622 info->io.addr_data, info->io.regsize, info->io.regspacing,
2625 dev_set_drvdata(&dev->dev, info);
2627 if (add_smi(info)) {
2635 static int __devexit ipmi_of_remove(struct platform_device *dev)
2637 cleanup_one_si(dev_get_drvdata(&dev->dev));
2641 static struct of_device_id ipmi_match[] =
2643 { .type = "ipmi", .compatible = "ipmi-kcs",
2644 .data = (void *)(unsigned long) SI_KCS },
2645 { .type = "ipmi", .compatible = "ipmi-smic",
2646 .data = (void *)(unsigned long) SI_SMIC },
2647 { .type = "ipmi", .compatible = "ipmi-bt",
2648 .data = (void *)(unsigned long) SI_BT },
2652 static struct of_platform_driver ipmi_of_platform_driver = {
2655 .owner = THIS_MODULE,
2656 .of_match_table = ipmi_match,
2658 .probe = ipmi_of_probe,
2659 .remove = __devexit_p(ipmi_of_remove),
2661 #endif /* CONFIG_PPC_OF */
2663 static int wait_for_msg_done(struct smi_info *smi_info)
2665 enum si_sm_result smi_result;
2667 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2669 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2670 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2671 schedule_timeout_uninterruptible(1);
2672 smi_result = smi_info->handlers->event(
2673 smi_info->si_sm, 100);
2674 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2675 smi_result = smi_info->handlers->event(
2676 smi_info->si_sm, 0);
2680 if (smi_result == SI_SM_HOSED)
2682 * We couldn't get the state machine to run, so whatever's at
2683 * the port is probably not an IPMI SMI interface.
2690 static int try_get_dev_id(struct smi_info *smi_info)
2692 unsigned char msg[2];
2693 unsigned char *resp;
2694 unsigned long resp_len;
2697 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2702 * Do a Get Device ID command, since it comes back with some
2705 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2706 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2707 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2709 rv = wait_for_msg_done(smi_info);
2713 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2714 resp, IPMI_MAX_MSG_LENGTH);
2716 /* Check and record info from the get device id, in case we need it. */
2717 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2724 static int try_enable_event_buffer(struct smi_info *smi_info)
2726 unsigned char msg[3];
2727 unsigned char *resp;
2728 unsigned long resp_len;
2731 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2735 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2736 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2737 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2739 rv = wait_for_msg_done(smi_info);
2741 printk(KERN_WARNING PFX "Error getting response from get"
2742 " global enables command, the event buffer is not"
2747 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2748 resp, IPMI_MAX_MSG_LENGTH);
2751 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2752 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2754 printk(KERN_WARNING PFX "Invalid return from get global"
2755 " enables command, cannot enable the event buffer.\n");
2760 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2761 /* buffer is already enabled, nothing to do. */
2764 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2765 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2766 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2767 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2769 rv = wait_for_msg_done(smi_info);
2771 printk(KERN_WARNING PFX "Error getting response from set"
2772 " global, enables command, the event buffer is not"
2777 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2778 resp, IPMI_MAX_MSG_LENGTH);
2781 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2782 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2783 printk(KERN_WARNING PFX "Invalid return from get global,"
2784 "enables command, not enable the event buffer.\n");
2791 * An error when setting the event buffer bit means
2792 * that the event buffer is not supported.
2800 static int type_file_read_proc(char *page, char **start, off_t off,
2801 int count, int *eof, void *data)
2803 struct smi_info *smi = data;
2805 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
2808 static int stat_file_read_proc(char *page, char **start, off_t off,
2809 int count, int *eof, void *data)
2811 char *out = (char *) page;
2812 struct smi_info *smi = data;
2814 out += sprintf(out, "interrupts_enabled: %d\n",
2815 smi->irq && !smi->interrupt_disabled);
2816 out += sprintf(out, "short_timeouts: %u\n",
2817 smi_get_stat(smi, short_timeouts));
2818 out += sprintf(out, "long_timeouts: %u\n",
2819 smi_get_stat(smi, long_timeouts));
2820 out += sprintf(out, "idles: %u\n",
2821 smi_get_stat(smi, idles));
2822 out += sprintf(out, "interrupts: %u\n",
2823 smi_get_stat(smi, interrupts));
2824 out += sprintf(out, "attentions: %u\n",
2825 smi_get_stat(smi, attentions));
2826 out += sprintf(out, "flag_fetches: %u\n",
2827 smi_get_stat(smi, flag_fetches));
2828 out += sprintf(out, "hosed_count: %u\n",
2829 smi_get_stat(smi, hosed_count));
2830 out += sprintf(out, "complete_transactions: %u\n",
2831 smi_get_stat(smi, complete_transactions));
2832 out += sprintf(out, "events: %u\n",
2833 smi_get_stat(smi, events));
2834 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2835 smi_get_stat(smi, watchdog_pretimeouts));
2836 out += sprintf(out, "incoming_messages: %u\n",
2837 smi_get_stat(smi, incoming_messages));
2842 static int param_read_proc(char *page, char **start, off_t off,
2843 int count, int *eof, void *data)
2845 struct smi_info *smi = data;
2847 return sprintf(page,
2848 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2849 si_to_str[smi->si_type],
2850 addr_space_to_str[smi->io.addr_type],
2860 * oem_data_avail_to_receive_msg_avail
2861 * @info - smi_info structure with msg_flags set
2863 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2864 * Returns 1 indicating need to re-run handle_flags().
2866 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2868 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2874 * setup_dell_poweredge_oem_data_handler
2875 * @info - smi_info.device_id must be populated
2877 * Systems that match, but have firmware version < 1.40 may assert
2878 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2879 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2880 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2881 * as RECEIVE_MSG_AVAIL instead.
2883 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2884 * assert the OEM[012] bits, and if it did, the driver would have to
2885 * change to handle that properly, we don't actually check for the
2887 * Device ID = 0x20 BMC on PowerEdge 8G servers
2888 * Device Revision = 0x80
2889 * Firmware Revision1 = 0x01 BMC version 1.40
2890 * Firmware Revision2 = 0x40 BCD encoded
2891 * IPMI Version = 0x51 IPMI 1.5
2892 * Manufacturer ID = A2 02 00 Dell IANA
2894 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2895 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2898 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2899 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2900 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2901 #define DELL_IANA_MFR_ID 0x0002a2
2902 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2904 struct ipmi_device_id *id = &smi_info->device_id;
2905 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
2906 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2907 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2908 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2909 smi_info->oem_data_avail_handler =
2910 oem_data_avail_to_receive_msg_avail;
2911 } else if (ipmi_version_major(id) < 1 ||
2912 (ipmi_version_major(id) == 1 &&
2913 ipmi_version_minor(id) < 5)) {
2914 smi_info->oem_data_avail_handler =
2915 oem_data_avail_to_receive_msg_avail;
2920 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2921 static void return_hosed_msg_badsize(struct smi_info *smi_info)
2923 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2925 /* Make it a reponse */
2926 msg->rsp[0] = msg->data[0] | 4;
2927 msg->rsp[1] = msg->data[1];
2928 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2930 smi_info->curr_msg = NULL;
2931 deliver_recv_msg(smi_info, msg);
2935 * dell_poweredge_bt_xaction_handler
2936 * @info - smi_info.device_id must be populated
2938 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2939 * not respond to a Get SDR command if the length of the data
2940 * requested is exactly 0x3A, which leads to command timeouts and no
2941 * data returned. This intercepts such commands, and causes userspace
2942 * callers to try again with a different-sized buffer, which succeeds.
2945 #define STORAGE_NETFN 0x0A
2946 #define STORAGE_CMD_GET_SDR 0x23
2947 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2948 unsigned long unused,
2951 struct smi_info *smi_info = in;
2952 unsigned char *data = smi_info->curr_msg->data;
2953 unsigned int size = smi_info->curr_msg->data_size;
2955 (data[0]>>2) == STORAGE_NETFN &&
2956 data[1] == STORAGE_CMD_GET_SDR &&
2958 return_hosed_msg_badsize(smi_info);
2964 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2965 .notifier_call = dell_poweredge_bt_xaction_handler,
2969 * setup_dell_poweredge_bt_xaction_handler
2970 * @info - smi_info.device_id must be filled in already
2972 * Fills in smi_info.device_id.start_transaction_pre_hook
2973 * when we know what function to use there.
2976 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2978 struct ipmi_device_id *id = &smi_info->device_id;
2979 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
2980 smi_info->si_type == SI_BT)
2981 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2985 * setup_oem_data_handler
2986 * @info - smi_info.device_id must be filled in already
2988 * Fills in smi_info.device_id.oem_data_available_handler
2989 * when we know what function to use there.
2992 static void setup_oem_data_handler(struct smi_info *smi_info)
2994 setup_dell_poweredge_oem_data_handler(smi_info);
2997 static void setup_xaction_handlers(struct smi_info *smi_info)
2999 setup_dell_poweredge_bt_xaction_handler(smi_info);
3002 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3004 if (smi_info->intf) {
3006 * The timer and thread are only running if the
3007 * interface has been started up and registered.
3009 if (smi_info->thread != NULL)
3010 kthread_stop(smi_info->thread);
3011 del_timer_sync(&smi_info->si_timer);
3015 static __devinitdata struct ipmi_default_vals
3021 { .type = SI_KCS, .port = 0xca2 },
3022 { .type = SI_SMIC, .port = 0xca9 },
3023 { .type = SI_BT, .port = 0xe4 },
3027 static void __devinit default_find_bmc(void)
3029 struct smi_info *info;
3032 for (i = 0; ; i++) {
3033 if (!ipmi_defaults[i].port)
3036 if (check_legacy_ioport(ipmi_defaults[i].port))
3039 info = smi_info_alloc();
3043 info->addr_source = SI_DEFAULT;
3045 info->si_type = ipmi_defaults[i].type;
3046 info->io_setup = port_setup;
3047 info->io.addr_data = ipmi_defaults[i].port;
3048 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3050 info->io.addr = NULL;
3051 info->io.regspacing = DEFAULT_REGSPACING;
3052 info->io.regsize = DEFAULT_REGSPACING;
3053 info->io.regshift = 0;
3055 if (add_smi(info) == 0) {
3056 if ((try_smi_init(info)) == 0) {
3058 printk(KERN_INFO PFX "Found default %s"
3059 " state machine at %s address 0x%lx\n",
3060 si_to_str[info->si_type],
3061 addr_space_to_str[info->io.addr_type],
3062 info->io.addr_data);
3064 cleanup_one_si(info);
3071 static int is_new_interface(struct smi_info *info)
3075 list_for_each_entry(e, &smi_infos, link) {
3076 if (e->io.addr_type != info->io.addr_type)
3078 if (e->io.addr_data == info->io.addr_data)
3085 static int add_smi(struct smi_info *new_smi)
3089 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3090 ipmi_addr_src_to_str[new_smi->addr_source],
3091 si_to_str[new_smi->si_type]);
3092 mutex_lock(&smi_infos_lock);
3093 if (!is_new_interface(new_smi)) {
3094 printk(KERN_CONT " duplicate interface\n");
3099 printk(KERN_CONT "\n");
3101 /* So we know not to free it unless we have allocated one. */
3102 new_smi->intf = NULL;
3103 new_smi->si_sm = NULL;
3104 new_smi->handlers = NULL;
3106 list_add_tail(&new_smi->link, &smi_infos);
3109 mutex_unlock(&smi_infos_lock);
3113 static int try_smi_init(struct smi_info *new_smi)
3118 printk(KERN_INFO PFX "Trying %s-specified %s state"
3119 " machine at %s address 0x%lx, slave address 0x%x,"
3121 ipmi_addr_src_to_str[new_smi->addr_source],
3122 si_to_str[new_smi->si_type],
3123 addr_space_to_str[new_smi->io.addr_type],
3124 new_smi->io.addr_data,
3125 new_smi->slave_addr, new_smi->irq);
3127 switch (new_smi->si_type) {
3129 new_smi->handlers = &kcs_smi_handlers;
3133 new_smi->handlers = &smic_smi_handlers;
3137 new_smi->handlers = &bt_smi_handlers;
3141 /* No support for anything else yet. */
3146 /* Allocate the state machine's data and initialize it. */
3147 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3148 if (!new_smi->si_sm) {
3150 "Could not allocate state machine memory\n");
3154 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3157 /* Now that we know the I/O size, we can set up the I/O. */
3158 rv = new_smi->io_setup(new_smi);
3160 printk(KERN_ERR PFX "Could not set up I/O space\n");
3164 /* Do low-level detection first. */
3165 if (new_smi->handlers->detect(new_smi->si_sm)) {
3166 if (new_smi->addr_source)
3167 printk(KERN_INFO PFX "Interface detection failed\n");
3173 * Attempt a get device id command. If it fails, we probably
3174 * don't have a BMC here.
3176 rv = try_get_dev_id(new_smi);
3178 if (new_smi->addr_source)
3179 printk(KERN_INFO PFX "There appears to be no BMC"
3180 " at this location\n");
3184 setup_oem_data_handler(new_smi);
3185 setup_xaction_handlers(new_smi);
3187 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3188 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3189 new_smi->curr_msg = NULL;
3190 atomic_set(&new_smi->req_events, 0);
3191 new_smi->run_to_completion = 0;
3192 for (i = 0; i < SI_NUM_STATS; i++)
3193 atomic_set(&new_smi->stats[i], 0);
3195 new_smi->interrupt_disabled = 1;
3196 atomic_set(&new_smi->stop_operation, 0);
3197 new_smi->intf_num = smi_num;
3200 rv = try_enable_event_buffer(new_smi);
3202 new_smi->has_event_buffer = 1;
3205 * Start clearing the flags before we enable interrupts or the
3206 * timer to avoid racing with the timer.
3208 start_clear_flags(new_smi);
3209 /* IRQ is defined to be set when non-zero. */
3211 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3213 if (!new_smi->dev) {
3215 * If we don't already have a device from something
3216 * else (like PCI), then register a new one.
3218 new_smi->pdev = platform_device_alloc("ipmi_si",
3220 if (!new_smi->pdev) {
3222 "Unable to allocate platform device\n");
3225 new_smi->dev = &new_smi->pdev->dev;
3226 new_smi->dev->driver = &ipmi_driver.driver;
3228 rv = platform_device_add(new_smi->pdev);
3231 "Unable to register system interface device:"
3236 new_smi->dev_registered = 1;
3239 rv = ipmi_register_smi(&handlers,
3241 &new_smi->device_id,
3244 new_smi->slave_addr);
3246 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3248 goto out_err_stop_timer;
3251 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3252 type_file_read_proc,
3255 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3256 goto out_err_stop_timer;
3259 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3260 stat_file_read_proc,
3263 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3264 goto out_err_stop_timer;
3267 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3271 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3272 goto out_err_stop_timer;
3275 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3276 si_to_str[new_smi->si_type]);
3281 atomic_inc(&new_smi->stop_operation);
3282 wait_for_timer_and_thread(new_smi);
3285 new_smi->interrupt_disabled = 1;
3287 if (new_smi->intf) {
3288 ipmi_unregister_smi(new_smi->intf);
3289 new_smi->intf = NULL;
3292 if (new_smi->irq_cleanup) {
3293 new_smi->irq_cleanup(new_smi);
3294 new_smi->irq_cleanup = NULL;
3298 * Wait until we know that we are out of any interrupt
3299 * handlers might have been running before we freed the
3302 synchronize_sched();
3304 if (new_smi->si_sm) {
3305 if (new_smi->handlers)
3306 new_smi->handlers->cleanup(new_smi->si_sm);
3307 kfree(new_smi->si_sm);
3308 new_smi->si_sm = NULL;
3310 if (new_smi->addr_source_cleanup) {
3311 new_smi->addr_source_cleanup(new_smi);
3312 new_smi->addr_source_cleanup = NULL;
3314 if (new_smi->io_cleanup) {
3315 new_smi->io_cleanup(new_smi);
3316 new_smi->io_cleanup = NULL;
3319 if (new_smi->dev_registered) {
3320 platform_device_unregister(new_smi->pdev);
3321 new_smi->dev_registered = 0;
3327 static int __devinit init_ipmi_si(void)
3333 enum ipmi_addr_src type = SI_INVALID;
3339 /* Register the device drivers. */
3340 rv = driver_register(&ipmi_driver.driver);
3342 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
3347 /* Parse out the si_type string into its components. */
3350 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3352 str = strchr(str, ',');
3362 printk(KERN_INFO "IPMI System Interface driver.\n");
3364 hardcode_find_bmc();
3366 /* If the user gave us a device, they presumably want us to use it */
3367 mutex_lock(&smi_infos_lock);
3368 if (!list_empty(&smi_infos)) {
3369 mutex_unlock(&smi_infos_lock);
3372 mutex_unlock(&smi_infos_lock);
3375 rv = pci_register_driver(&ipmi_pci_driver);
3377 printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv);
3383 pnp_register_driver(&ipmi_pnp_driver);
3395 #ifdef CONFIG_PPC_OF
3396 of_register_platform_driver(&ipmi_of_platform_driver);
3400 /* We prefer devices with interrupts, but in the case of a machine
3401 with multiple BMCs we assume that there will be several instances
3402 of a given type so if we succeed in registering a type then also
3403 try to register everything else of the same type */
3405 mutex_lock(&smi_infos_lock);
3406 list_for_each_entry(e, &smi_infos, link) {
3407 /* Try to register a device if it has an IRQ and we either
3408 haven't successfully registered a device yet or this
3409 device has the same type as one we successfully registered */
3410 if (e->irq && (!type || e->addr_source == type)) {
3411 if (!try_smi_init(e)) {
3412 type = e->addr_source;
3417 /* type will only have been set if we successfully registered an si */
3419 mutex_unlock(&smi_infos_lock);
3423 /* Fall back to the preferred device */
3425 list_for_each_entry(e, &smi_infos, link) {
3426 if (!e->irq && (!type || e->addr_source == type)) {
3427 if (!try_smi_init(e)) {
3428 type = e->addr_source;
3432 mutex_unlock(&smi_infos_lock);
3437 if (si_trydefaults) {
3438 mutex_lock(&smi_infos_lock);
3439 if (list_empty(&smi_infos)) {
3440 /* No BMC was found, try defaults. */
3441 mutex_unlock(&smi_infos_lock);
3444 mutex_unlock(&smi_infos_lock);
3447 mutex_lock(&smi_infos_lock);
3448 if (unload_when_empty && list_empty(&smi_infos)) {
3449 mutex_unlock(&smi_infos_lock);
3452 pci_unregister_driver(&ipmi_pci_driver);
3455 #ifdef CONFIG_PPC_OF
3457 of_unregister_platform_driver(&ipmi_of_platform_driver);
3459 driver_unregister(&ipmi_driver.driver);
3460 printk(KERN_WARNING PFX
3461 "Unable to find any System Interface(s)\n");
3464 mutex_unlock(&smi_infos_lock);
3468 module_init(init_ipmi_si);
3470 static void cleanup_one_si(struct smi_info *to_clean)
3473 unsigned long flags;
3478 list_del(&to_clean->link);
3480 /* Tell the driver that we are shutting down. */
3481 atomic_inc(&to_clean->stop_operation);
3484 * Make sure the timer and thread are stopped and will not run
3487 wait_for_timer_and_thread(to_clean);
3490 * Timeouts are stopped, now make sure the interrupts are off
3491 * for the device. A little tricky with locks to make sure
3492 * there are no races.
3494 spin_lock_irqsave(&to_clean->si_lock, flags);
3495 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3496 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3498 schedule_timeout_uninterruptible(1);
3499 spin_lock_irqsave(&to_clean->si_lock, flags);
3501 disable_si_irq(to_clean);
3502 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3503 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3505 schedule_timeout_uninterruptible(1);
3508 /* Clean up interrupts and make sure that everything is done. */
3509 if (to_clean->irq_cleanup)
3510 to_clean->irq_cleanup(to_clean);
3511 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3513 schedule_timeout_uninterruptible(1);
3517 rv = ipmi_unregister_smi(to_clean->intf);
3520 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3524 if (to_clean->handlers)
3525 to_clean->handlers->cleanup(to_clean->si_sm);
3527 kfree(to_clean->si_sm);
3529 if (to_clean->addr_source_cleanup)
3530 to_clean->addr_source_cleanup(to_clean);
3531 if (to_clean->io_cleanup)
3532 to_clean->io_cleanup(to_clean);
3534 if (to_clean->dev_registered)
3535 platform_device_unregister(to_clean->pdev);
3540 static void __exit cleanup_ipmi_si(void)
3542 struct smi_info *e, *tmp_e;
3549 pci_unregister_driver(&ipmi_pci_driver);
3553 pnp_unregister_driver(&ipmi_pnp_driver);
3556 #ifdef CONFIG_PPC_OF
3558 of_unregister_platform_driver(&ipmi_of_platform_driver);
3561 mutex_lock(&smi_infos_lock);
3562 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3564 mutex_unlock(&smi_infos_lock);
3566 driver_unregister(&ipmi_driver.driver);
3568 module_exit(cleanup_ipmi_si);
3570 MODULE_LICENSE("GPL");
3571 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3572 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3573 " system interfaces.");