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>
72 #include <linux/of_address.h>
73 #include <linux/of_irq.h>
76 #define PFX "ipmi_si: "
78 /* Measure times between events in the driver. */
81 /* Call every 10 ms. */
82 #define SI_TIMEOUT_TIME_USEC 10000
83 #define SI_USEC_PER_JIFFY (1000000/HZ)
84 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
85 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
93 SI_CLEARING_FLAGS_THEN_SET_IRQ,
95 SI_ENABLE_INTERRUPTS1,
96 SI_ENABLE_INTERRUPTS2,
97 SI_DISABLE_INTERRUPTS1,
98 SI_DISABLE_INTERRUPTS2
99 /* FIXME - add watchdog stuff. */
102 /* Some BT-specific defines we need here. */
103 #define IPMI_BT_INTMASK_REG 2
104 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
105 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
108 SI_KCS, SI_SMIC, SI_BT
110 static char *si_to_str[] = { "kcs", "smic", "bt" };
113 SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS,
114 SI_PCI, SI_DEVICETREE, SI_DEFAULT
116 static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
117 "ACPI", "SMBIOS", "PCI",
118 "device-tree", "default" };
120 #define DEVICE_NAME "ipmi_si"
122 static struct platform_driver ipmi_driver = {
125 .bus = &platform_bus_type
131 * Indexes into stats[] in smi_info below.
133 enum si_stat_indexes {
135 * Number of times the driver requested a timer while an operation
138 SI_STAT_short_timeouts = 0,
141 * Number of times the driver requested a timer while nothing was in
144 SI_STAT_long_timeouts,
146 /* Number of times the interface was idle while being polled. */
149 /* Number of interrupts the driver handled. */
152 /* Number of time the driver got an ATTN from the hardware. */
155 /* Number of times the driver requested flags from the hardware. */
156 SI_STAT_flag_fetches,
158 /* Number of times the hardware didn't follow the state machine. */
161 /* Number of completed messages. */
162 SI_STAT_complete_transactions,
164 /* Number of IPMI events received from the hardware. */
167 /* Number of watchdog pretimeouts. */
168 SI_STAT_watchdog_pretimeouts,
170 /* Number of asyncronous messages received. */
171 SI_STAT_incoming_messages,
174 /* This *must* remain last, add new values above this. */
181 struct si_sm_data *si_sm;
182 struct si_sm_handlers *handlers;
183 enum si_type si_type;
186 struct list_head xmit_msgs;
187 struct list_head hp_xmit_msgs;
188 struct ipmi_smi_msg *curr_msg;
189 enum si_intf_state si_state;
192 * Used to handle the various types of I/O that can occur with
196 int (*io_setup)(struct smi_info *info);
197 void (*io_cleanup)(struct smi_info *info);
198 int (*irq_setup)(struct smi_info *info);
199 void (*irq_cleanup)(struct smi_info *info);
200 unsigned int io_size;
201 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
202 void (*addr_source_cleanup)(struct smi_info *info);
203 void *addr_source_data;
206 * Per-OEM handler, called from handle_flags(). Returns 1
207 * when handle_flags() needs to be re-run or 0 indicating it
208 * set si_state itself.
210 int (*oem_data_avail_handler)(struct smi_info *smi_info);
213 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
214 * is set to hold the flags until we are done handling everything
217 #define RECEIVE_MSG_AVAIL 0x01
218 #define EVENT_MSG_BUFFER_FULL 0x02
219 #define WDT_PRE_TIMEOUT_INT 0x08
220 #define OEM0_DATA_AVAIL 0x20
221 #define OEM1_DATA_AVAIL 0x40
222 #define OEM2_DATA_AVAIL 0x80
223 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
226 unsigned char msg_flags;
228 /* Does the BMC have an event buffer? */
229 char has_event_buffer;
232 * If set to true, this will request events the next time the
233 * state machine is idle.
238 * If true, run the state machine to completion on every send
239 * call. Generally used after a panic to make sure stuff goes
242 int run_to_completion;
244 /* The I/O port of an SI interface. */
248 * The space between start addresses of the two ports. For
249 * instance, if the first port is 0xca2 and the spacing is 4, then
250 * the second port is 0xca6.
252 unsigned int spacing;
254 /* zero if no irq; */
257 /* The timer for this si. */
258 struct timer_list si_timer;
260 /* The time (in jiffies) the last timeout occurred at. */
261 unsigned long last_timeout_jiffies;
263 /* Used to gracefully stop the timer without race conditions. */
264 atomic_t stop_operation;
267 * The driver will disable interrupts when it gets into a
268 * situation where it cannot handle messages due to lack of
269 * memory. Once that situation clears up, it will re-enable
272 int interrupt_disabled;
274 /* From the get device id response... */
275 struct ipmi_device_id device_id;
277 /* Driver model stuff. */
279 struct platform_device *pdev;
282 * True if we allocated the device, false if it came from
283 * someplace else (like PCI).
287 /* Slave address, could be reported from DMI. */
288 unsigned char slave_addr;
290 /* Counters and things for the proc filesystem. */
291 atomic_t stats[SI_NUM_STATS];
293 struct task_struct *thread;
295 struct list_head link;
298 #define smi_inc_stat(smi, stat) \
299 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
300 #define smi_get_stat(smi, stat) \
301 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
303 #define SI_MAX_PARMS 4
305 static int force_kipmid[SI_MAX_PARMS];
306 static int num_force_kipmid;
308 static int pci_registered;
311 static int pnp_registered;
314 static int of_registered;
317 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
318 static int num_max_busy_us;
320 static int unload_when_empty = 1;
322 static int add_smi(struct smi_info *smi);
323 static int try_smi_init(struct smi_info *smi);
324 static void cleanup_one_si(struct smi_info *to_clean);
326 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
327 static int register_xaction_notifier(struct notifier_block *nb)
329 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
332 static void deliver_recv_msg(struct smi_info *smi_info,
333 struct ipmi_smi_msg *msg)
335 /* Deliver the message to the upper layer with the lock
338 if (smi_info->run_to_completion) {
339 ipmi_smi_msg_received(smi_info->intf, msg);
341 spin_unlock(&(smi_info->si_lock));
342 ipmi_smi_msg_received(smi_info->intf, msg);
343 spin_lock(&(smi_info->si_lock));
347 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
349 struct ipmi_smi_msg *msg = smi_info->curr_msg;
351 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
352 cCode = IPMI_ERR_UNSPECIFIED;
353 /* else use it as is */
355 /* Make it a reponse */
356 msg->rsp[0] = msg->data[0] | 4;
357 msg->rsp[1] = msg->data[1];
361 smi_info->curr_msg = NULL;
362 deliver_recv_msg(smi_info, msg);
365 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
368 struct list_head *entry = NULL;
374 * No need to save flags, we aleady have interrupts off and we
375 * already hold the SMI lock.
377 if (!smi_info->run_to_completion)
378 spin_lock(&(smi_info->msg_lock));
380 /* Pick the high priority queue first. */
381 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
382 entry = smi_info->hp_xmit_msgs.next;
383 } else if (!list_empty(&(smi_info->xmit_msgs))) {
384 entry = smi_info->xmit_msgs.next;
388 smi_info->curr_msg = NULL;
394 smi_info->curr_msg = list_entry(entry,
399 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
401 err = atomic_notifier_call_chain(&xaction_notifier_list,
403 if (err & NOTIFY_STOP_MASK) {
404 rv = SI_SM_CALL_WITHOUT_DELAY;
407 err = smi_info->handlers->start_transaction(
409 smi_info->curr_msg->data,
410 smi_info->curr_msg->data_size);
412 return_hosed_msg(smi_info, err);
414 rv = SI_SM_CALL_WITHOUT_DELAY;
417 if (!smi_info->run_to_completion)
418 spin_unlock(&(smi_info->msg_lock));
423 static void start_enable_irq(struct smi_info *smi_info)
425 unsigned char msg[2];
428 * If we are enabling interrupts, we have to tell the
431 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
432 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
434 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
435 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
438 static void start_disable_irq(struct smi_info *smi_info)
440 unsigned char msg[2];
442 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
443 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
445 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
446 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
449 static void start_clear_flags(struct smi_info *smi_info)
451 unsigned char msg[3];
453 /* Make sure the watchdog pre-timeout flag is not set at startup. */
454 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
455 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
456 msg[2] = WDT_PRE_TIMEOUT_INT;
458 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
459 smi_info->si_state = SI_CLEARING_FLAGS;
463 * When we have a situtaion where we run out of memory and cannot
464 * allocate messages, we just leave them in the BMC and run the system
465 * polled until we can allocate some memory. Once we have some
466 * memory, we will re-enable the interrupt.
468 static inline void disable_si_irq(struct smi_info *smi_info)
470 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
471 start_disable_irq(smi_info);
472 smi_info->interrupt_disabled = 1;
473 if (!atomic_read(&smi_info->stop_operation))
474 mod_timer(&smi_info->si_timer,
475 jiffies + SI_TIMEOUT_JIFFIES);
479 static inline void enable_si_irq(struct smi_info *smi_info)
481 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
482 start_enable_irq(smi_info);
483 smi_info->interrupt_disabled = 0;
487 static void handle_flags(struct smi_info *smi_info)
490 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
491 /* Watchdog pre-timeout */
492 smi_inc_stat(smi_info, watchdog_pretimeouts);
494 start_clear_flags(smi_info);
495 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
496 spin_unlock(&(smi_info->si_lock));
497 ipmi_smi_watchdog_pretimeout(smi_info->intf);
498 spin_lock(&(smi_info->si_lock));
499 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
500 /* Messages available. */
501 smi_info->curr_msg = ipmi_alloc_smi_msg();
502 if (!smi_info->curr_msg) {
503 disable_si_irq(smi_info);
504 smi_info->si_state = SI_NORMAL;
507 enable_si_irq(smi_info);
509 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
510 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
511 smi_info->curr_msg->data_size = 2;
513 smi_info->handlers->start_transaction(
515 smi_info->curr_msg->data,
516 smi_info->curr_msg->data_size);
517 smi_info->si_state = SI_GETTING_MESSAGES;
518 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
519 /* Events available. */
520 smi_info->curr_msg = ipmi_alloc_smi_msg();
521 if (!smi_info->curr_msg) {
522 disable_si_irq(smi_info);
523 smi_info->si_state = SI_NORMAL;
526 enable_si_irq(smi_info);
528 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
529 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
530 smi_info->curr_msg->data_size = 2;
532 smi_info->handlers->start_transaction(
534 smi_info->curr_msg->data,
535 smi_info->curr_msg->data_size);
536 smi_info->si_state = SI_GETTING_EVENTS;
537 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
538 smi_info->oem_data_avail_handler) {
539 if (smi_info->oem_data_avail_handler(smi_info))
542 smi_info->si_state = SI_NORMAL;
545 static void handle_transaction_done(struct smi_info *smi_info)
547 struct ipmi_smi_msg *msg;
552 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
554 switch (smi_info->si_state) {
556 if (!smi_info->curr_msg)
559 smi_info->curr_msg->rsp_size
560 = smi_info->handlers->get_result(
562 smi_info->curr_msg->rsp,
563 IPMI_MAX_MSG_LENGTH);
566 * Do this here becase deliver_recv_msg() releases the
567 * lock, and a new message can be put in during the
568 * time the lock is released.
570 msg = smi_info->curr_msg;
571 smi_info->curr_msg = NULL;
572 deliver_recv_msg(smi_info, msg);
575 case SI_GETTING_FLAGS:
577 unsigned char msg[4];
580 /* We got the flags from the SMI, now handle them. */
581 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
583 /* Error fetching flags, just give up for now. */
584 smi_info->si_state = SI_NORMAL;
585 } else if (len < 4) {
587 * Hmm, no flags. That's technically illegal, but
588 * don't use uninitialized data.
590 smi_info->si_state = SI_NORMAL;
592 smi_info->msg_flags = msg[3];
593 handle_flags(smi_info);
598 case SI_CLEARING_FLAGS:
599 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
601 unsigned char msg[3];
603 /* We cleared the flags. */
604 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
606 /* Error clearing flags */
607 dev_warn(smi_info->dev,
608 "Error clearing flags: %2.2x\n", msg[2]);
610 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
611 start_enable_irq(smi_info);
613 smi_info->si_state = SI_NORMAL;
617 case SI_GETTING_EVENTS:
619 smi_info->curr_msg->rsp_size
620 = smi_info->handlers->get_result(
622 smi_info->curr_msg->rsp,
623 IPMI_MAX_MSG_LENGTH);
626 * Do this here becase deliver_recv_msg() releases the
627 * lock, and a new message can be put in during the
628 * time the lock is released.
630 msg = smi_info->curr_msg;
631 smi_info->curr_msg = NULL;
632 if (msg->rsp[2] != 0) {
633 /* Error getting event, probably done. */
636 /* Take off the event flag. */
637 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
638 handle_flags(smi_info);
640 smi_inc_stat(smi_info, events);
643 * Do this before we deliver the message
644 * because delivering the message releases the
645 * lock and something else can mess with the
648 handle_flags(smi_info);
650 deliver_recv_msg(smi_info, msg);
655 case SI_GETTING_MESSAGES:
657 smi_info->curr_msg->rsp_size
658 = smi_info->handlers->get_result(
660 smi_info->curr_msg->rsp,
661 IPMI_MAX_MSG_LENGTH);
664 * Do this here becase deliver_recv_msg() releases the
665 * lock, and a new message can be put in during the
666 * time the lock is released.
668 msg = smi_info->curr_msg;
669 smi_info->curr_msg = NULL;
670 if (msg->rsp[2] != 0) {
671 /* Error getting event, probably done. */
674 /* Take off the msg flag. */
675 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
676 handle_flags(smi_info);
678 smi_inc_stat(smi_info, incoming_messages);
681 * Do this before we deliver the message
682 * because delivering the message releases the
683 * lock and something else can mess with the
686 handle_flags(smi_info);
688 deliver_recv_msg(smi_info, msg);
693 case SI_ENABLE_INTERRUPTS1:
695 unsigned char msg[4];
697 /* We got the flags from the SMI, now handle them. */
698 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
700 dev_warn(smi_info->dev, "Could not enable interrupts"
701 ", failed get, using polled mode.\n");
702 smi_info->si_state = SI_NORMAL;
704 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
705 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
707 IPMI_BMC_RCV_MSG_INTR |
708 IPMI_BMC_EVT_MSG_INTR);
709 smi_info->handlers->start_transaction(
710 smi_info->si_sm, msg, 3);
711 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
716 case SI_ENABLE_INTERRUPTS2:
718 unsigned char msg[4];
720 /* We got the flags from the SMI, now handle them. */
721 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
723 dev_warn(smi_info->dev, "Could not enable interrupts"
724 ", failed set, using polled mode.\n");
726 smi_info->interrupt_disabled = 0;
727 smi_info->si_state = SI_NORMAL;
731 case SI_DISABLE_INTERRUPTS1:
733 unsigned char msg[4];
735 /* We got the flags from the SMI, now handle them. */
736 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
738 dev_warn(smi_info->dev, "Could not disable interrupts"
740 smi_info->si_state = SI_NORMAL;
742 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
743 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
745 ~(IPMI_BMC_RCV_MSG_INTR |
746 IPMI_BMC_EVT_MSG_INTR));
747 smi_info->handlers->start_transaction(
748 smi_info->si_sm, msg, 3);
749 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
754 case SI_DISABLE_INTERRUPTS2:
756 unsigned char msg[4];
758 /* We got the flags from the SMI, now handle them. */
759 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
761 dev_warn(smi_info->dev, "Could not disable interrupts"
764 smi_info->si_state = SI_NORMAL;
771 * Called on timeouts and events. Timeouts should pass the elapsed
772 * time, interrupts should pass in zero. Must be called with
773 * si_lock held and interrupts disabled.
775 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
778 enum si_sm_result si_sm_result;
782 * There used to be a loop here that waited a little while
783 * (around 25us) before giving up. That turned out to be
784 * pointless, the minimum delays I was seeing were in the 300us
785 * range, which is far too long to wait in an interrupt. So
786 * we just run until the state machine tells us something
787 * happened or it needs a delay.
789 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
791 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
792 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
794 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
795 smi_inc_stat(smi_info, complete_transactions);
797 handle_transaction_done(smi_info);
798 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
799 } else if (si_sm_result == SI_SM_HOSED) {
800 smi_inc_stat(smi_info, hosed_count);
803 * Do the before return_hosed_msg, because that
806 smi_info->si_state = SI_NORMAL;
807 if (smi_info->curr_msg != NULL) {
809 * If we were handling a user message, format
810 * a response to send to the upper layer to
811 * tell it about the error.
813 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
815 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
819 * We prefer handling attn over new messages. But don't do
820 * this if there is not yet an upper layer to handle anything.
822 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
823 unsigned char msg[2];
825 smi_inc_stat(smi_info, attentions);
828 * Got a attn, send down a get message flags to see
829 * what's causing it. It would be better to handle
830 * this in the upper layer, but due to the way
831 * interrupts work with the SMI, that's not really
834 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
835 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
837 smi_info->handlers->start_transaction(
838 smi_info->si_sm, msg, 2);
839 smi_info->si_state = SI_GETTING_FLAGS;
843 /* If we are currently idle, try to start the next message. */
844 if (si_sm_result == SI_SM_IDLE) {
845 smi_inc_stat(smi_info, idles);
847 si_sm_result = start_next_msg(smi_info);
848 if (si_sm_result != SI_SM_IDLE)
852 if ((si_sm_result == SI_SM_IDLE)
853 && (atomic_read(&smi_info->req_events))) {
855 * We are idle and the upper layer requested that I fetch
858 atomic_set(&smi_info->req_events, 0);
860 smi_info->curr_msg = ipmi_alloc_smi_msg();
861 if (!smi_info->curr_msg)
864 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
865 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
866 smi_info->curr_msg->data_size = 2;
868 smi_info->handlers->start_transaction(
870 smi_info->curr_msg->data,
871 smi_info->curr_msg->data_size);
872 smi_info->si_state = SI_GETTING_EVENTS;
879 static void sender(void *send_info,
880 struct ipmi_smi_msg *msg,
883 struct smi_info *smi_info = send_info;
884 enum si_sm_result result;
890 if (atomic_read(&smi_info->stop_operation)) {
891 msg->rsp[0] = msg->data[0] | 4;
892 msg->rsp[1] = msg->data[1];
893 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
895 deliver_recv_msg(smi_info, msg);
901 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
904 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
906 if (smi_info->thread)
907 wake_up_process(smi_info->thread);
909 if (smi_info->run_to_completion) {
911 * If we are running to completion, then throw it in
912 * the list and run transactions until everything is
913 * clear. Priority doesn't matter here.
917 * Run to completion means we are single-threaded, no
920 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
922 result = smi_event_handler(smi_info, 0);
923 while (result != SI_SM_IDLE) {
924 udelay(SI_SHORT_TIMEOUT_USEC);
925 result = smi_event_handler(smi_info,
926 SI_SHORT_TIMEOUT_USEC);
931 spin_lock_irqsave(&smi_info->msg_lock, flags);
933 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
935 list_add_tail(&msg->link, &smi_info->xmit_msgs);
936 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
938 spin_lock_irqsave(&smi_info->si_lock, flags);
939 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
940 start_next_msg(smi_info);
941 spin_unlock_irqrestore(&smi_info->si_lock, flags);
944 static void set_run_to_completion(void *send_info, int i_run_to_completion)
946 struct smi_info *smi_info = send_info;
947 enum si_sm_result result;
949 smi_info->run_to_completion = i_run_to_completion;
950 if (i_run_to_completion) {
951 result = smi_event_handler(smi_info, 0);
952 while (result != SI_SM_IDLE) {
953 udelay(SI_SHORT_TIMEOUT_USEC);
954 result = smi_event_handler(smi_info,
955 SI_SHORT_TIMEOUT_USEC);
961 * Use -1 in the nsec value of the busy waiting timespec to tell that
962 * we are spinning in kipmid looking for something and not delaying
965 static inline void ipmi_si_set_not_busy(struct timespec *ts)
969 static inline int ipmi_si_is_busy(struct timespec *ts)
971 return ts->tv_nsec != -1;
974 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
975 const struct smi_info *smi_info,
976 struct timespec *busy_until)
978 unsigned int max_busy_us = 0;
980 if (smi_info->intf_num < num_max_busy_us)
981 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
982 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
983 ipmi_si_set_not_busy(busy_until);
984 else if (!ipmi_si_is_busy(busy_until)) {
985 getnstimeofday(busy_until);
986 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
989 getnstimeofday(&now);
990 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
991 ipmi_si_set_not_busy(busy_until);
1000 * A busy-waiting loop for speeding up IPMI operation.
1002 * Lousy hardware makes this hard. This is only enabled for systems
1003 * that are not BT and do not have interrupts. It starts spinning
1004 * when an operation is complete or until max_busy tells it to stop
1005 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1006 * Documentation/IPMI.txt for details.
1008 static int ipmi_thread(void *data)
1010 struct smi_info *smi_info = data;
1011 unsigned long flags;
1012 enum si_sm_result smi_result;
1013 struct timespec busy_until;
1015 ipmi_si_set_not_busy(&busy_until);
1016 set_user_nice(current, 19);
1017 while (!kthread_should_stop()) {
1020 spin_lock_irqsave(&(smi_info->si_lock), flags);
1021 smi_result = smi_event_handler(smi_info, 0);
1022 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1023 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1025 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1027 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1029 else if (smi_result == SI_SM_IDLE)
1030 schedule_timeout_interruptible(100);
1032 schedule_timeout_interruptible(1);
1038 static void poll(void *send_info)
1040 struct smi_info *smi_info = send_info;
1041 unsigned long flags;
1044 * Make sure there is some delay in the poll loop so we can
1045 * drive time forward and timeout things.
1048 spin_lock_irqsave(&smi_info->si_lock, flags);
1049 smi_event_handler(smi_info, 10);
1050 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1053 static void request_events(void *send_info)
1055 struct smi_info *smi_info = send_info;
1057 if (atomic_read(&smi_info->stop_operation) ||
1058 !smi_info->has_event_buffer)
1061 atomic_set(&smi_info->req_events, 1);
1064 static int initialized;
1066 static void smi_timeout(unsigned long data)
1068 struct smi_info *smi_info = (struct smi_info *) data;
1069 enum si_sm_result smi_result;
1070 unsigned long flags;
1071 unsigned long jiffies_now;
1078 spin_lock_irqsave(&(smi_info->si_lock), flags);
1080 do_gettimeofday(&t);
1081 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1083 jiffies_now = jiffies;
1084 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1085 * SI_USEC_PER_JIFFY);
1086 smi_result = smi_event_handler(smi_info, time_diff);
1088 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1090 smi_info->last_timeout_jiffies = jiffies_now;
1092 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1093 /* Running with interrupts, only do long timeouts. */
1094 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1095 smi_inc_stat(smi_info, long_timeouts);
1100 * If the state machine asks for a short delay, then shorten
1101 * the timer timeout.
1103 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1104 smi_inc_stat(smi_info, short_timeouts);
1105 timeout = jiffies + 1;
1107 smi_inc_stat(smi_info, long_timeouts);
1108 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1112 if (smi_result != SI_SM_IDLE)
1113 mod_timer(&(smi_info->si_timer), timeout);
1116 static irqreturn_t si_irq_handler(int irq, void *data)
1118 struct smi_info *smi_info = data;
1119 unsigned long flags;
1124 spin_lock_irqsave(&(smi_info->si_lock), flags);
1126 smi_inc_stat(smi_info, interrupts);
1129 do_gettimeofday(&t);
1130 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1132 smi_event_handler(smi_info, 0);
1133 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1137 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1139 struct smi_info *smi_info = data;
1140 /* We need to clear the IRQ flag for the BT interface. */
1141 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1142 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1143 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1144 return si_irq_handler(irq, data);
1147 static int smi_start_processing(void *send_info,
1150 struct smi_info *new_smi = send_info;
1153 new_smi->intf = intf;
1155 /* Try to claim any interrupts. */
1156 if (new_smi->irq_setup)
1157 new_smi->irq_setup(new_smi);
1159 /* Set up the timer that drives the interface. */
1160 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1161 new_smi->last_timeout_jiffies = jiffies;
1162 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1165 * Check if the user forcefully enabled the daemon.
1167 if (new_smi->intf_num < num_force_kipmid)
1168 enable = force_kipmid[new_smi->intf_num];
1170 * The BT interface is efficient enough to not need a thread,
1171 * and there is no need for a thread if we have interrupts.
1173 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1177 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1178 "kipmi%d", new_smi->intf_num);
1179 if (IS_ERR(new_smi->thread)) {
1180 dev_notice(new_smi->dev, "Could not start"
1181 " kernel thread due to error %ld, only using"
1182 " timers to drive the interface\n",
1183 PTR_ERR(new_smi->thread));
1184 new_smi->thread = NULL;
1191 static void set_maintenance_mode(void *send_info, int enable)
1193 struct smi_info *smi_info = send_info;
1196 atomic_set(&smi_info->req_events, 0);
1199 static struct ipmi_smi_handlers handlers = {
1200 .owner = THIS_MODULE,
1201 .start_processing = smi_start_processing,
1203 .request_events = request_events,
1204 .set_maintenance_mode = set_maintenance_mode,
1205 .set_run_to_completion = set_run_to_completion,
1210 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1211 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1214 static LIST_HEAD(smi_infos);
1215 static DEFINE_MUTEX(smi_infos_lock);
1216 static int smi_num; /* Used to sequence the SMIs */
1218 #define DEFAULT_REGSPACING 1
1219 #define DEFAULT_REGSIZE 1
1221 static int si_trydefaults = 1;
1222 static char *si_type[SI_MAX_PARMS];
1223 #define MAX_SI_TYPE_STR 30
1224 static char si_type_str[MAX_SI_TYPE_STR];
1225 static unsigned long addrs[SI_MAX_PARMS];
1226 static unsigned int num_addrs;
1227 static unsigned int ports[SI_MAX_PARMS];
1228 static unsigned int num_ports;
1229 static int irqs[SI_MAX_PARMS];
1230 static unsigned int num_irqs;
1231 static int regspacings[SI_MAX_PARMS];
1232 static unsigned int num_regspacings;
1233 static int regsizes[SI_MAX_PARMS];
1234 static unsigned int num_regsizes;
1235 static int regshifts[SI_MAX_PARMS];
1236 static unsigned int num_regshifts;
1237 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1238 static unsigned int num_slave_addrs;
1240 #define IPMI_IO_ADDR_SPACE 0
1241 #define IPMI_MEM_ADDR_SPACE 1
1242 static char *addr_space_to_str[] = { "i/o", "mem" };
1244 static int hotmod_handler(const char *val, struct kernel_param *kp);
1246 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1247 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1248 " Documentation/IPMI.txt in the kernel sources for the"
1251 module_param_named(trydefaults, si_trydefaults, bool, 0);
1252 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1253 " default scan of the KCS and SMIC interface at the standard"
1255 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1256 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1257 " interface separated by commas. The types are 'kcs',"
1258 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1259 " the first interface to kcs and the second to bt");
1260 module_param_array(addrs, ulong, &num_addrs, 0);
1261 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1262 " addresses separated by commas. Only use if an interface"
1263 " is in memory. Otherwise, set it to zero or leave"
1265 module_param_array(ports, uint, &num_ports, 0);
1266 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1267 " addresses separated by commas. Only use if an interface"
1268 " is a port. Otherwise, set it to zero or leave"
1270 module_param_array(irqs, int, &num_irqs, 0);
1271 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1272 " addresses separated by commas. Only use if an interface"
1273 " has an interrupt. Otherwise, set it to zero or leave"
1275 module_param_array(regspacings, int, &num_regspacings, 0);
1276 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1277 " and each successive register used by the interface. For"
1278 " instance, if the start address is 0xca2 and the spacing"
1279 " is 2, then the second address is at 0xca4. Defaults"
1281 module_param_array(regsizes, int, &num_regsizes, 0);
1282 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1283 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1284 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1285 " the 8-bit IPMI register has to be read from a larger"
1287 module_param_array(regshifts, int, &num_regshifts, 0);
1288 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1289 " IPMI register, in bits. For instance, if the data"
1290 " is read from a 32-bit word and the IPMI data is in"
1291 " bit 8-15, then the shift would be 8");
1292 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1293 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1294 " the controller. Normally this is 0x20, but can be"
1295 " overridden by this parm. This is an array indexed"
1296 " by interface number.");
1297 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1298 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1299 " disabled(0). Normally the IPMI driver auto-detects"
1300 " this, but the value may be overridden by this parm.");
1301 module_param(unload_when_empty, int, 0);
1302 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1303 " specified or found, default is 1. Setting to 0"
1304 " is useful for hot add of devices using hotmod.");
1305 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1306 MODULE_PARM_DESC(kipmid_max_busy_us,
1307 "Max time (in microseconds) to busy-wait for IPMI data before"
1308 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1309 " if kipmid is using up a lot of CPU time.");
1312 static void std_irq_cleanup(struct smi_info *info)
1314 if (info->si_type == SI_BT)
1315 /* Disable the interrupt in the BT interface. */
1316 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1317 free_irq(info->irq, info);
1320 static int std_irq_setup(struct smi_info *info)
1327 if (info->si_type == SI_BT) {
1328 rv = request_irq(info->irq,
1330 IRQF_SHARED | IRQF_DISABLED,
1334 /* Enable the interrupt in the BT interface. */
1335 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1336 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1338 rv = request_irq(info->irq,
1340 IRQF_SHARED | IRQF_DISABLED,
1344 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1345 " running polled\n",
1346 DEVICE_NAME, info->irq);
1349 info->irq_cleanup = std_irq_cleanup;
1350 dev_info(info->dev, "Using irq %d\n", info->irq);
1356 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1358 unsigned int addr = io->addr_data;
1360 return inb(addr + (offset * io->regspacing));
1363 static void port_outb(struct si_sm_io *io, unsigned int offset,
1366 unsigned int addr = io->addr_data;
1368 outb(b, addr + (offset * io->regspacing));
1371 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1373 unsigned int addr = io->addr_data;
1375 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1378 static void port_outw(struct si_sm_io *io, unsigned int offset,
1381 unsigned int addr = io->addr_data;
1383 outw(b << io->regshift, addr + (offset * io->regspacing));
1386 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1388 unsigned int addr = io->addr_data;
1390 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1393 static void port_outl(struct si_sm_io *io, unsigned int offset,
1396 unsigned int addr = io->addr_data;
1398 outl(b << io->regshift, addr+(offset * io->regspacing));
1401 static void port_cleanup(struct smi_info *info)
1403 unsigned int addr = info->io.addr_data;
1407 for (idx = 0; idx < info->io_size; idx++)
1408 release_region(addr + idx * info->io.regspacing,
1413 static int port_setup(struct smi_info *info)
1415 unsigned int addr = info->io.addr_data;
1421 info->io_cleanup = port_cleanup;
1424 * Figure out the actual inb/inw/inl/etc routine to use based
1425 * upon the register size.
1427 switch (info->io.regsize) {
1429 info->io.inputb = port_inb;
1430 info->io.outputb = port_outb;
1433 info->io.inputb = port_inw;
1434 info->io.outputb = port_outw;
1437 info->io.inputb = port_inl;
1438 info->io.outputb = port_outl;
1441 dev_warn(info->dev, "Invalid register size: %d\n",
1447 * Some BIOSes reserve disjoint I/O regions in their ACPI
1448 * tables. This causes problems when trying to register the
1449 * entire I/O region. Therefore we must register each I/O
1452 for (idx = 0; idx < info->io_size; idx++) {
1453 if (request_region(addr + idx * info->io.regspacing,
1454 info->io.regsize, DEVICE_NAME) == NULL) {
1455 /* Undo allocations */
1457 release_region(addr + idx * info->io.regspacing,
1466 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1468 return readb((io->addr)+(offset * io->regspacing));
1471 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1474 writeb(b, (io->addr)+(offset * io->regspacing));
1477 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1479 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1483 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1486 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1489 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1491 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1495 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1498 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1502 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1504 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1508 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1511 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1515 static void mem_cleanup(struct smi_info *info)
1517 unsigned long addr = info->io.addr_data;
1520 if (info->io.addr) {
1521 iounmap(info->io.addr);
1523 mapsize = ((info->io_size * info->io.regspacing)
1524 - (info->io.regspacing - info->io.regsize));
1526 release_mem_region(addr, mapsize);
1530 static int mem_setup(struct smi_info *info)
1532 unsigned long addr = info->io.addr_data;
1538 info->io_cleanup = mem_cleanup;
1541 * Figure out the actual readb/readw/readl/etc routine to use based
1542 * upon the register size.
1544 switch (info->io.regsize) {
1546 info->io.inputb = intf_mem_inb;
1547 info->io.outputb = intf_mem_outb;
1550 info->io.inputb = intf_mem_inw;
1551 info->io.outputb = intf_mem_outw;
1554 info->io.inputb = intf_mem_inl;
1555 info->io.outputb = intf_mem_outl;
1559 info->io.inputb = mem_inq;
1560 info->io.outputb = mem_outq;
1564 dev_warn(info->dev, "Invalid register size: %d\n",
1570 * Calculate the total amount of memory to claim. This is an
1571 * unusual looking calculation, but it avoids claiming any
1572 * more memory than it has to. It will claim everything
1573 * between the first address to the end of the last full
1576 mapsize = ((info->io_size * info->io.regspacing)
1577 - (info->io.regspacing - info->io.regsize));
1579 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1582 info->io.addr = ioremap(addr, mapsize);
1583 if (info->io.addr == NULL) {
1584 release_mem_region(addr, mapsize);
1591 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1592 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1600 enum hotmod_op { HM_ADD, HM_REMOVE };
1601 struct hotmod_vals {
1605 static struct hotmod_vals hotmod_ops[] = {
1607 { "remove", HM_REMOVE },
1610 static struct hotmod_vals hotmod_si[] = {
1612 { "smic", SI_SMIC },
1616 static struct hotmod_vals hotmod_as[] = {
1617 { "mem", IPMI_MEM_ADDR_SPACE },
1618 { "i/o", IPMI_IO_ADDR_SPACE },
1622 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1627 s = strchr(*curr, ',');
1629 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1634 for (i = 0; hotmod_ops[i].name; i++) {
1635 if (strcmp(*curr, v[i].name) == 0) {
1642 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1646 static int check_hotmod_int_op(const char *curr, const char *option,
1647 const char *name, int *val)
1651 if (strcmp(curr, name) == 0) {
1653 printk(KERN_WARNING PFX
1654 "No option given for '%s'\n",
1658 *val = simple_strtoul(option, &n, 0);
1659 if ((*n != '\0') || (*option == '\0')) {
1660 printk(KERN_WARNING PFX
1661 "Bad option given for '%s'\n",
1670 static struct smi_info *smi_info_alloc(void)
1672 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1675 spin_lock_init(&info->si_lock);
1676 spin_lock_init(&info->msg_lock);
1681 static int hotmod_handler(const char *val, struct kernel_param *kp)
1683 char *str = kstrdup(val, GFP_KERNEL);
1685 char *next, *curr, *s, *n, *o;
1687 enum si_type si_type;
1697 struct smi_info *info;
1702 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1705 while ((ival >= 0) && isspace(str[ival])) {
1710 for (curr = str; curr; curr = next) {
1715 ipmb = 0; /* Choose the default if not specified */
1717 next = strchr(curr, ':');
1723 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1728 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1733 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1737 s = strchr(curr, ',');
1742 addr = simple_strtoul(curr, &n, 0);
1743 if ((*n != '\0') || (*curr == '\0')) {
1744 printk(KERN_WARNING PFX "Invalid hotmod address"
1751 s = strchr(curr, ',');
1756 o = strchr(curr, '=');
1761 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1766 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1771 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1776 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1781 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1788 printk(KERN_WARNING PFX
1789 "Invalid hotmod option '%s'\n",
1795 info = smi_info_alloc();
1801 info->addr_source = SI_HOTMOD;
1802 info->si_type = si_type;
1803 info->io.addr_data = addr;
1804 info->io.addr_type = addr_space;
1805 if (addr_space == IPMI_MEM_ADDR_SPACE)
1806 info->io_setup = mem_setup;
1808 info->io_setup = port_setup;
1810 info->io.addr = NULL;
1811 info->io.regspacing = regspacing;
1812 if (!info->io.regspacing)
1813 info->io.regspacing = DEFAULT_REGSPACING;
1814 info->io.regsize = regsize;
1815 if (!info->io.regsize)
1816 info->io.regsize = DEFAULT_REGSPACING;
1817 info->io.regshift = regshift;
1820 info->irq_setup = std_irq_setup;
1821 info->slave_addr = ipmb;
1823 if (!add_smi(info)) {
1824 if (try_smi_init(info))
1825 cleanup_one_si(info);
1831 struct smi_info *e, *tmp_e;
1833 mutex_lock(&smi_infos_lock);
1834 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1835 if (e->io.addr_type != addr_space)
1837 if (e->si_type != si_type)
1839 if (e->io.addr_data == addr)
1842 mutex_unlock(&smi_infos_lock);
1851 static void __devinit hardcode_find_bmc(void)
1854 struct smi_info *info;
1856 for (i = 0; i < SI_MAX_PARMS; i++) {
1857 if (!ports[i] && !addrs[i])
1860 info = smi_info_alloc();
1864 info->addr_source = SI_HARDCODED;
1865 printk(KERN_INFO PFX "probing via hardcoded address\n");
1867 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1868 info->si_type = SI_KCS;
1869 } else if (strcmp(si_type[i], "smic") == 0) {
1870 info->si_type = SI_SMIC;
1871 } else if (strcmp(si_type[i], "bt") == 0) {
1872 info->si_type = SI_BT;
1874 printk(KERN_WARNING PFX "Interface type specified "
1875 "for interface %d, was invalid: %s\n",
1883 info->io_setup = port_setup;
1884 info->io.addr_data = ports[i];
1885 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1886 } else if (addrs[i]) {
1888 info->io_setup = mem_setup;
1889 info->io.addr_data = addrs[i];
1890 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1892 printk(KERN_WARNING PFX "Interface type specified "
1893 "for interface %d, but port and address were "
1894 "not set or set to zero.\n", i);
1899 info->io.addr = NULL;
1900 info->io.regspacing = regspacings[i];
1901 if (!info->io.regspacing)
1902 info->io.regspacing = DEFAULT_REGSPACING;
1903 info->io.regsize = regsizes[i];
1904 if (!info->io.regsize)
1905 info->io.regsize = DEFAULT_REGSPACING;
1906 info->io.regshift = regshifts[i];
1907 info->irq = irqs[i];
1909 info->irq_setup = std_irq_setup;
1910 info->slave_addr = slave_addrs[i];
1912 if (!add_smi(info)) {
1913 if (try_smi_init(info))
1914 cleanup_one_si(info);
1923 #include <linux/acpi.h>
1926 * Once we get an ACPI failure, we don't try any more, because we go
1927 * through the tables sequentially. Once we don't find a table, there
1930 static int acpi_failure;
1932 /* For GPE-type interrupts. */
1933 static u32 ipmi_acpi_gpe(void *context)
1935 struct smi_info *smi_info = context;
1936 unsigned long flags;
1941 spin_lock_irqsave(&(smi_info->si_lock), flags);
1943 smi_inc_stat(smi_info, interrupts);
1946 do_gettimeofday(&t);
1947 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1949 smi_event_handler(smi_info, 0);
1950 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1952 return ACPI_INTERRUPT_HANDLED;
1955 static void acpi_gpe_irq_cleanup(struct smi_info *info)
1960 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1963 static int acpi_gpe_irq_setup(struct smi_info *info)
1970 /* FIXME - is level triggered right? */
1971 status = acpi_install_gpe_handler(NULL,
1973 ACPI_GPE_LEVEL_TRIGGERED,
1976 if (status != AE_OK) {
1977 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1978 " running polled\n", DEVICE_NAME, info->irq);
1982 info->irq_cleanup = acpi_gpe_irq_cleanup;
1983 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
1990 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2001 s8 CreatorRevision[4];
2004 s16 SpecificationRevision;
2007 * Bit 0 - SCI interrupt supported
2008 * Bit 1 - I/O APIC/SAPIC
2013 * If bit 0 of InterruptType is set, then this is the SCI
2014 * interrupt in the GPEx_STS register.
2021 * If bit 1 of InterruptType is set, then this is the I/O
2022 * APIC/SAPIC interrupt.
2024 u32 GlobalSystemInterrupt;
2026 /* The actual register address. */
2027 struct acpi_generic_address addr;
2031 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2034 static int __devinit try_init_spmi(struct SPMITable *spmi)
2036 struct smi_info *info;
2038 if (spmi->IPMIlegacy != 1) {
2039 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2043 info = smi_info_alloc();
2045 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2049 info->addr_source = SI_SPMI;
2050 printk(KERN_INFO PFX "probing via SPMI\n");
2052 /* Figure out the interface type. */
2053 switch (spmi->InterfaceType) {
2055 info->si_type = SI_KCS;
2058 info->si_type = SI_SMIC;
2061 info->si_type = SI_BT;
2064 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2065 spmi->InterfaceType);
2070 if (spmi->InterruptType & 1) {
2071 /* We've got a GPE interrupt. */
2072 info->irq = spmi->GPE;
2073 info->irq_setup = acpi_gpe_irq_setup;
2074 } else if (spmi->InterruptType & 2) {
2075 /* We've got an APIC/SAPIC interrupt. */
2076 info->irq = spmi->GlobalSystemInterrupt;
2077 info->irq_setup = std_irq_setup;
2079 /* Use the default interrupt setting. */
2081 info->irq_setup = NULL;
2084 if (spmi->addr.bit_width) {
2085 /* A (hopefully) properly formed register bit width. */
2086 info->io.regspacing = spmi->addr.bit_width / 8;
2088 info->io.regspacing = DEFAULT_REGSPACING;
2090 info->io.regsize = info->io.regspacing;
2091 info->io.regshift = spmi->addr.bit_offset;
2093 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2094 info->io_setup = mem_setup;
2095 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2096 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2097 info->io_setup = port_setup;
2098 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2101 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2104 info->io.addr_data = spmi->addr.address;
2106 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2107 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2108 info->io.addr_data, info->io.regsize, info->io.regspacing,
2117 static void __devinit spmi_find_bmc(void)
2120 struct SPMITable *spmi;
2129 for (i = 0; ; i++) {
2130 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2131 (struct acpi_table_header **)&spmi);
2132 if (status != AE_OK)
2135 try_init_spmi(spmi);
2139 static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2140 const struct pnp_device_id *dev_id)
2142 struct acpi_device *acpi_dev;
2143 struct smi_info *info;
2144 struct resource *res, *res_second;
2147 unsigned long long tmp;
2149 acpi_dev = pnp_acpi_device(dev);
2153 info = smi_info_alloc();
2157 info->addr_source = SI_ACPI;
2158 printk(KERN_INFO PFX "probing via ACPI\n");
2160 handle = acpi_dev->handle;
2162 /* _IFT tells us the interface type: KCS, BT, etc */
2163 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2164 if (ACPI_FAILURE(status))
2169 info->si_type = SI_KCS;
2172 info->si_type = SI_SMIC;
2175 info->si_type = SI_BT;
2178 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2182 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2184 info->io_setup = port_setup;
2185 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2187 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2189 info->io_setup = mem_setup;
2190 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2194 dev_err(&dev->dev, "no I/O or memory address\n");
2197 info->io.addr_data = res->start;
2199 info->io.regspacing = DEFAULT_REGSPACING;
2200 res_second = pnp_get_resource(dev,
2201 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2202 IORESOURCE_IO : IORESOURCE_MEM,
2205 if (res_second->start > info->io.addr_data)
2206 info->io.regspacing = res_second->start - info->io.addr_data;
2208 info->io.regsize = DEFAULT_REGSPACING;
2209 info->io.regshift = 0;
2211 /* If _GPE exists, use it; otherwise use standard interrupts */
2212 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2213 if (ACPI_SUCCESS(status)) {
2215 info->irq_setup = acpi_gpe_irq_setup;
2216 } else if (pnp_irq_valid(dev, 0)) {
2217 info->irq = pnp_irq(dev, 0);
2218 info->irq_setup = std_irq_setup;
2221 info->dev = &dev->dev;
2222 pnp_set_drvdata(dev, info);
2224 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2225 res, info->io.regsize, info->io.regspacing,
2238 static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2240 struct smi_info *info = pnp_get_drvdata(dev);
2242 cleanup_one_si(info);
2245 static const struct pnp_device_id pnp_dev_table[] = {
2250 static struct pnp_driver ipmi_pnp_driver = {
2251 .name = DEVICE_NAME,
2252 .probe = ipmi_pnp_probe,
2253 .remove = __devexit_p(ipmi_pnp_remove),
2254 .id_table = pnp_dev_table,
2259 struct dmi_ipmi_data {
2262 unsigned long base_addr;
2268 static int __devinit decode_dmi(const struct dmi_header *dm,
2269 struct dmi_ipmi_data *dmi)
2271 const u8 *data = (const u8 *)dm;
2272 unsigned long base_addr;
2274 u8 len = dm->length;
2276 dmi->type = data[4];
2278 memcpy(&base_addr, data+8, sizeof(unsigned long));
2280 if (base_addr & 1) {
2282 base_addr &= 0xFFFE;
2283 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2286 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2288 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2290 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2292 dmi->irq = data[0x11];
2294 /* The top two bits of byte 0x10 hold the register spacing. */
2295 reg_spacing = (data[0x10] & 0xC0) >> 6;
2296 switch (reg_spacing) {
2297 case 0x00: /* Byte boundaries */
2300 case 0x01: /* 32-bit boundaries */
2303 case 0x02: /* 16-byte boundaries */
2307 /* Some other interface, just ignore it. */
2313 * Note that technically, the lower bit of the base
2314 * address should be 1 if the address is I/O and 0 if
2315 * the address is in memory. So many systems get that
2316 * wrong (and all that I have seen are I/O) so we just
2317 * ignore that bit and assume I/O. Systems that use
2318 * memory should use the newer spec, anyway.
2320 dmi->base_addr = base_addr & 0xfffe;
2321 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2325 dmi->slave_addr = data[6];
2330 static void __devinit try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2332 struct smi_info *info;
2334 info = smi_info_alloc();
2336 printk(KERN_ERR PFX "Could not allocate SI data\n");
2340 info->addr_source = SI_SMBIOS;
2341 printk(KERN_INFO PFX "probing via SMBIOS\n");
2343 switch (ipmi_data->type) {
2344 case 0x01: /* KCS */
2345 info->si_type = SI_KCS;
2347 case 0x02: /* SMIC */
2348 info->si_type = SI_SMIC;
2351 info->si_type = SI_BT;
2358 switch (ipmi_data->addr_space) {
2359 case IPMI_MEM_ADDR_SPACE:
2360 info->io_setup = mem_setup;
2361 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2364 case IPMI_IO_ADDR_SPACE:
2365 info->io_setup = port_setup;
2366 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2371 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2372 ipmi_data->addr_space);
2375 info->io.addr_data = ipmi_data->base_addr;
2377 info->io.regspacing = ipmi_data->offset;
2378 if (!info->io.regspacing)
2379 info->io.regspacing = DEFAULT_REGSPACING;
2380 info->io.regsize = DEFAULT_REGSPACING;
2381 info->io.regshift = 0;
2383 info->slave_addr = ipmi_data->slave_addr;
2385 info->irq = ipmi_data->irq;
2387 info->irq_setup = std_irq_setup;
2389 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2390 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2391 info->io.addr_data, info->io.regsize, info->io.regspacing,
2398 static void __devinit dmi_find_bmc(void)
2400 const struct dmi_device *dev = NULL;
2401 struct dmi_ipmi_data data;
2404 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2405 memset(&data, 0, sizeof(data));
2406 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2409 try_init_dmi(&data);
2412 #endif /* CONFIG_DMI */
2416 #define PCI_ERMC_CLASSCODE 0x0C0700
2417 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2418 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2419 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2420 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2421 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2423 #define PCI_HP_VENDOR_ID 0x103C
2424 #define PCI_MMC_DEVICE_ID 0x121A
2425 #define PCI_MMC_ADDR_CW 0x10
2427 static void ipmi_pci_cleanup(struct smi_info *info)
2429 struct pci_dev *pdev = info->addr_source_data;
2431 pci_disable_device(pdev);
2434 static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2435 const struct pci_device_id *ent)
2438 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2439 struct smi_info *info;
2441 info = smi_info_alloc();
2445 info->addr_source = SI_PCI;
2446 dev_info(&pdev->dev, "probing via PCI");
2448 switch (class_type) {
2449 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2450 info->si_type = SI_SMIC;
2453 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2454 info->si_type = SI_KCS;
2457 case PCI_ERMC_CLASSCODE_TYPE_BT:
2458 info->si_type = SI_BT;
2463 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2467 rv = pci_enable_device(pdev);
2469 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2474 info->addr_source_cleanup = ipmi_pci_cleanup;
2475 info->addr_source_data = pdev;
2477 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2478 info->io_setup = port_setup;
2479 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2481 info->io_setup = mem_setup;
2482 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2484 info->io.addr_data = pci_resource_start(pdev, 0);
2486 info->io.regspacing = DEFAULT_REGSPACING;
2487 info->io.regsize = DEFAULT_REGSPACING;
2488 info->io.regshift = 0;
2490 info->irq = pdev->irq;
2492 info->irq_setup = std_irq_setup;
2494 info->dev = &pdev->dev;
2495 pci_set_drvdata(pdev, info);
2497 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2498 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2507 static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2509 struct smi_info *info = pci_get_drvdata(pdev);
2510 cleanup_one_si(info);
2514 static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2519 static int ipmi_pci_resume(struct pci_dev *pdev)
2525 static struct pci_device_id ipmi_pci_devices[] = {
2526 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2527 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2530 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2532 static struct pci_driver ipmi_pci_driver = {
2533 .name = DEVICE_NAME,
2534 .id_table = ipmi_pci_devices,
2535 .probe = ipmi_pci_probe,
2536 .remove = __devexit_p(ipmi_pci_remove),
2538 .suspend = ipmi_pci_suspend,
2539 .resume = ipmi_pci_resume,
2542 #endif /* CONFIG_PCI */
2545 #ifdef CONFIG_PPC_OF
2546 static int __devinit ipmi_of_probe(struct platform_device *dev,
2547 const struct of_device_id *match)
2549 struct smi_info *info;
2550 struct resource resource;
2551 const __be32 *regsize, *regspacing, *regshift;
2552 struct device_node *np = dev->dev.of_node;
2556 dev_info(&dev->dev, "probing via device tree\n");
2558 ret = of_address_to_resource(np, 0, &resource);
2560 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2564 regsize = of_get_property(np, "reg-size", &proplen);
2565 if (regsize && proplen != 4) {
2566 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2570 regspacing = of_get_property(np, "reg-spacing", &proplen);
2571 if (regspacing && proplen != 4) {
2572 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2576 regshift = of_get_property(np, "reg-shift", &proplen);
2577 if (regshift && proplen != 4) {
2578 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2582 info = smi_info_alloc();
2586 "could not allocate memory for OF probe\n");
2590 info->si_type = (enum si_type) match->data;
2591 info->addr_source = SI_DEVICETREE;
2592 info->irq_setup = std_irq_setup;
2594 if (resource.flags & IORESOURCE_IO) {
2595 info->io_setup = port_setup;
2596 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2598 info->io_setup = mem_setup;
2599 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2602 info->io.addr_data = resource.start;
2604 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2605 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2606 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2608 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2609 info->dev = &dev->dev;
2611 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2612 info->io.addr_data, info->io.regsize, info->io.regspacing,
2615 dev_set_drvdata(&dev->dev, info);
2617 if (add_smi(info)) {
2625 static int __devexit ipmi_of_remove(struct platform_device *dev)
2627 cleanup_one_si(dev_get_drvdata(&dev->dev));
2631 static struct of_device_id ipmi_match[] =
2633 { .type = "ipmi", .compatible = "ipmi-kcs",
2634 .data = (void *)(unsigned long) SI_KCS },
2635 { .type = "ipmi", .compatible = "ipmi-smic",
2636 .data = (void *)(unsigned long) SI_SMIC },
2637 { .type = "ipmi", .compatible = "ipmi-bt",
2638 .data = (void *)(unsigned long) SI_BT },
2642 static struct of_platform_driver ipmi_of_platform_driver = {
2645 .owner = THIS_MODULE,
2646 .of_match_table = ipmi_match,
2648 .probe = ipmi_of_probe,
2649 .remove = __devexit_p(ipmi_of_remove),
2651 #endif /* CONFIG_PPC_OF */
2653 static int wait_for_msg_done(struct smi_info *smi_info)
2655 enum si_sm_result smi_result;
2657 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2659 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2660 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2661 schedule_timeout_uninterruptible(1);
2662 smi_result = smi_info->handlers->event(
2663 smi_info->si_sm, 100);
2664 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2665 smi_result = smi_info->handlers->event(
2666 smi_info->si_sm, 0);
2670 if (smi_result == SI_SM_HOSED)
2672 * We couldn't get the state machine to run, so whatever's at
2673 * the port is probably not an IPMI SMI interface.
2680 static int try_get_dev_id(struct smi_info *smi_info)
2682 unsigned char msg[2];
2683 unsigned char *resp;
2684 unsigned long resp_len;
2687 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2692 * Do a Get Device ID command, since it comes back with some
2695 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2696 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2697 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2699 rv = wait_for_msg_done(smi_info);
2703 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2704 resp, IPMI_MAX_MSG_LENGTH);
2706 /* Check and record info from the get device id, in case we need it. */
2707 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2714 static int try_enable_event_buffer(struct smi_info *smi_info)
2716 unsigned char msg[3];
2717 unsigned char *resp;
2718 unsigned long resp_len;
2721 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2725 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2726 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2727 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2729 rv = wait_for_msg_done(smi_info);
2731 printk(KERN_WARNING PFX "Error getting response from get"
2732 " global enables command, the event buffer is not"
2737 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2738 resp, IPMI_MAX_MSG_LENGTH);
2741 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2742 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2744 printk(KERN_WARNING PFX "Invalid return from get global"
2745 " enables command, cannot enable the event buffer.\n");
2750 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2751 /* buffer is already enabled, nothing to do. */
2754 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2755 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2756 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2757 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2759 rv = wait_for_msg_done(smi_info);
2761 printk(KERN_WARNING PFX "Error getting response from set"
2762 " global, enables command, the event buffer is not"
2767 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2768 resp, IPMI_MAX_MSG_LENGTH);
2771 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2772 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2773 printk(KERN_WARNING PFX "Invalid return from get global,"
2774 "enables command, not enable the event buffer.\n");
2781 * An error when setting the event buffer bit means
2782 * that the event buffer is not supported.
2790 static int type_file_read_proc(char *page, char **start, off_t off,
2791 int count, int *eof, void *data)
2793 struct smi_info *smi = data;
2795 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
2798 static int stat_file_read_proc(char *page, char **start, off_t off,
2799 int count, int *eof, void *data)
2801 char *out = (char *) page;
2802 struct smi_info *smi = data;
2804 out += sprintf(out, "interrupts_enabled: %d\n",
2805 smi->irq && !smi->interrupt_disabled);
2806 out += sprintf(out, "short_timeouts: %u\n",
2807 smi_get_stat(smi, short_timeouts));
2808 out += sprintf(out, "long_timeouts: %u\n",
2809 smi_get_stat(smi, long_timeouts));
2810 out += sprintf(out, "idles: %u\n",
2811 smi_get_stat(smi, idles));
2812 out += sprintf(out, "interrupts: %u\n",
2813 smi_get_stat(smi, interrupts));
2814 out += sprintf(out, "attentions: %u\n",
2815 smi_get_stat(smi, attentions));
2816 out += sprintf(out, "flag_fetches: %u\n",
2817 smi_get_stat(smi, flag_fetches));
2818 out += sprintf(out, "hosed_count: %u\n",
2819 smi_get_stat(smi, hosed_count));
2820 out += sprintf(out, "complete_transactions: %u\n",
2821 smi_get_stat(smi, complete_transactions));
2822 out += sprintf(out, "events: %u\n",
2823 smi_get_stat(smi, events));
2824 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2825 smi_get_stat(smi, watchdog_pretimeouts));
2826 out += sprintf(out, "incoming_messages: %u\n",
2827 smi_get_stat(smi, incoming_messages));
2832 static int param_read_proc(char *page, char **start, off_t off,
2833 int count, int *eof, void *data)
2835 struct smi_info *smi = data;
2837 return sprintf(page,
2838 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2839 si_to_str[smi->si_type],
2840 addr_space_to_str[smi->io.addr_type],
2850 * oem_data_avail_to_receive_msg_avail
2851 * @info - smi_info structure with msg_flags set
2853 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2854 * Returns 1 indicating need to re-run handle_flags().
2856 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2858 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2864 * setup_dell_poweredge_oem_data_handler
2865 * @info - smi_info.device_id must be populated
2867 * Systems that match, but have firmware version < 1.40 may assert
2868 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2869 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2870 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2871 * as RECEIVE_MSG_AVAIL instead.
2873 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2874 * assert the OEM[012] bits, and if it did, the driver would have to
2875 * change to handle that properly, we don't actually check for the
2877 * Device ID = 0x20 BMC on PowerEdge 8G servers
2878 * Device Revision = 0x80
2879 * Firmware Revision1 = 0x01 BMC version 1.40
2880 * Firmware Revision2 = 0x40 BCD encoded
2881 * IPMI Version = 0x51 IPMI 1.5
2882 * Manufacturer ID = A2 02 00 Dell IANA
2884 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2885 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2888 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2889 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2890 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2891 #define DELL_IANA_MFR_ID 0x0002a2
2892 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2894 struct ipmi_device_id *id = &smi_info->device_id;
2895 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
2896 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2897 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2898 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2899 smi_info->oem_data_avail_handler =
2900 oem_data_avail_to_receive_msg_avail;
2901 } else if (ipmi_version_major(id) < 1 ||
2902 (ipmi_version_major(id) == 1 &&
2903 ipmi_version_minor(id) < 5)) {
2904 smi_info->oem_data_avail_handler =
2905 oem_data_avail_to_receive_msg_avail;
2910 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2911 static void return_hosed_msg_badsize(struct smi_info *smi_info)
2913 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2915 /* Make it a reponse */
2916 msg->rsp[0] = msg->data[0] | 4;
2917 msg->rsp[1] = msg->data[1];
2918 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2920 smi_info->curr_msg = NULL;
2921 deliver_recv_msg(smi_info, msg);
2925 * dell_poweredge_bt_xaction_handler
2926 * @info - smi_info.device_id must be populated
2928 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2929 * not respond to a Get SDR command if the length of the data
2930 * requested is exactly 0x3A, which leads to command timeouts and no
2931 * data returned. This intercepts such commands, and causes userspace
2932 * callers to try again with a different-sized buffer, which succeeds.
2935 #define STORAGE_NETFN 0x0A
2936 #define STORAGE_CMD_GET_SDR 0x23
2937 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2938 unsigned long unused,
2941 struct smi_info *smi_info = in;
2942 unsigned char *data = smi_info->curr_msg->data;
2943 unsigned int size = smi_info->curr_msg->data_size;
2945 (data[0]>>2) == STORAGE_NETFN &&
2946 data[1] == STORAGE_CMD_GET_SDR &&
2948 return_hosed_msg_badsize(smi_info);
2954 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2955 .notifier_call = dell_poweredge_bt_xaction_handler,
2959 * setup_dell_poweredge_bt_xaction_handler
2960 * @info - smi_info.device_id must be filled in already
2962 * Fills in smi_info.device_id.start_transaction_pre_hook
2963 * when we know what function to use there.
2966 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2968 struct ipmi_device_id *id = &smi_info->device_id;
2969 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
2970 smi_info->si_type == SI_BT)
2971 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2975 * setup_oem_data_handler
2976 * @info - smi_info.device_id must be filled in already
2978 * Fills in smi_info.device_id.oem_data_available_handler
2979 * when we know what function to use there.
2982 static void setup_oem_data_handler(struct smi_info *smi_info)
2984 setup_dell_poweredge_oem_data_handler(smi_info);
2987 static void setup_xaction_handlers(struct smi_info *smi_info)
2989 setup_dell_poweredge_bt_xaction_handler(smi_info);
2992 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
2994 if (smi_info->intf) {
2996 * The timer and thread are only running if the
2997 * interface has been started up and registered.
2999 if (smi_info->thread != NULL)
3000 kthread_stop(smi_info->thread);
3001 del_timer_sync(&smi_info->si_timer);
3005 static __devinitdata struct ipmi_default_vals
3011 { .type = SI_KCS, .port = 0xca2 },
3012 { .type = SI_SMIC, .port = 0xca9 },
3013 { .type = SI_BT, .port = 0xe4 },
3017 static void __devinit default_find_bmc(void)
3019 struct smi_info *info;
3022 for (i = 0; ; i++) {
3023 if (!ipmi_defaults[i].port)
3026 if (check_legacy_ioport(ipmi_defaults[i].port))
3029 info = smi_info_alloc();
3033 info->addr_source = SI_DEFAULT;
3035 info->si_type = ipmi_defaults[i].type;
3036 info->io_setup = port_setup;
3037 info->io.addr_data = ipmi_defaults[i].port;
3038 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3040 info->io.addr = NULL;
3041 info->io.regspacing = DEFAULT_REGSPACING;
3042 info->io.regsize = DEFAULT_REGSPACING;
3043 info->io.regshift = 0;
3045 if (add_smi(info) == 0) {
3046 if ((try_smi_init(info)) == 0) {
3048 printk(KERN_INFO PFX "Found default %s"
3049 " state machine at %s address 0x%lx\n",
3050 si_to_str[info->si_type],
3051 addr_space_to_str[info->io.addr_type],
3052 info->io.addr_data);
3054 cleanup_one_si(info);
3061 static int is_new_interface(struct smi_info *info)
3065 list_for_each_entry(e, &smi_infos, link) {
3066 if (e->io.addr_type != info->io.addr_type)
3068 if (e->io.addr_data == info->io.addr_data)
3075 static int add_smi(struct smi_info *new_smi)
3079 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3080 ipmi_addr_src_to_str[new_smi->addr_source],
3081 si_to_str[new_smi->si_type]);
3082 mutex_lock(&smi_infos_lock);
3083 if (!is_new_interface(new_smi)) {
3084 printk(KERN_CONT " duplicate interface\n");
3089 printk(KERN_CONT "\n");
3091 /* So we know not to free it unless we have allocated one. */
3092 new_smi->intf = NULL;
3093 new_smi->si_sm = NULL;
3094 new_smi->handlers = NULL;
3096 list_add_tail(&new_smi->link, &smi_infos);
3099 mutex_unlock(&smi_infos_lock);
3103 static int try_smi_init(struct smi_info *new_smi)
3108 printk(KERN_INFO PFX "Trying %s-specified %s state"
3109 " machine at %s address 0x%lx, slave address 0x%x,"
3111 ipmi_addr_src_to_str[new_smi->addr_source],
3112 si_to_str[new_smi->si_type],
3113 addr_space_to_str[new_smi->io.addr_type],
3114 new_smi->io.addr_data,
3115 new_smi->slave_addr, new_smi->irq);
3117 switch (new_smi->si_type) {
3119 new_smi->handlers = &kcs_smi_handlers;
3123 new_smi->handlers = &smic_smi_handlers;
3127 new_smi->handlers = &bt_smi_handlers;
3131 /* No support for anything else yet. */
3136 /* Allocate the state machine's data and initialize it. */
3137 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3138 if (!new_smi->si_sm) {
3140 "Could not allocate state machine memory\n");
3144 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3147 /* Now that we know the I/O size, we can set up the I/O. */
3148 rv = new_smi->io_setup(new_smi);
3150 printk(KERN_ERR PFX "Could not set up I/O space\n");
3154 /* Do low-level detection first. */
3155 if (new_smi->handlers->detect(new_smi->si_sm)) {
3156 if (new_smi->addr_source)
3157 printk(KERN_INFO PFX "Interface detection failed\n");
3163 * Attempt a get device id command. If it fails, we probably
3164 * don't have a BMC here.
3166 rv = try_get_dev_id(new_smi);
3168 if (new_smi->addr_source)
3169 printk(KERN_INFO PFX "There appears to be no BMC"
3170 " at this location\n");
3174 setup_oem_data_handler(new_smi);
3175 setup_xaction_handlers(new_smi);
3177 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3178 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3179 new_smi->curr_msg = NULL;
3180 atomic_set(&new_smi->req_events, 0);
3181 new_smi->run_to_completion = 0;
3182 for (i = 0; i < SI_NUM_STATS; i++)
3183 atomic_set(&new_smi->stats[i], 0);
3185 new_smi->interrupt_disabled = 1;
3186 atomic_set(&new_smi->stop_operation, 0);
3187 new_smi->intf_num = smi_num;
3190 rv = try_enable_event_buffer(new_smi);
3192 new_smi->has_event_buffer = 1;
3195 * Start clearing the flags before we enable interrupts or the
3196 * timer to avoid racing with the timer.
3198 start_clear_flags(new_smi);
3199 /* IRQ is defined to be set when non-zero. */
3201 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3203 if (!new_smi->dev) {
3205 * If we don't already have a device from something
3206 * else (like PCI), then register a new one.
3208 new_smi->pdev = platform_device_alloc("ipmi_si",
3210 if (!new_smi->pdev) {
3212 "Unable to allocate platform device\n");
3215 new_smi->dev = &new_smi->pdev->dev;
3216 new_smi->dev->driver = &ipmi_driver.driver;
3218 rv = platform_device_add(new_smi->pdev);
3221 "Unable to register system interface device:"
3226 new_smi->dev_registered = 1;
3229 rv = ipmi_register_smi(&handlers,
3231 &new_smi->device_id,
3234 new_smi->slave_addr);
3236 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3238 goto out_err_stop_timer;
3241 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3242 type_file_read_proc,
3245 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3246 goto out_err_stop_timer;
3249 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3250 stat_file_read_proc,
3253 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3254 goto out_err_stop_timer;
3257 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3261 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3262 goto out_err_stop_timer;
3265 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3266 si_to_str[new_smi->si_type]);
3271 atomic_inc(&new_smi->stop_operation);
3272 wait_for_timer_and_thread(new_smi);
3275 new_smi->interrupt_disabled = 1;
3277 if (new_smi->intf) {
3278 ipmi_unregister_smi(new_smi->intf);
3279 new_smi->intf = NULL;
3282 if (new_smi->irq_cleanup) {
3283 new_smi->irq_cleanup(new_smi);
3284 new_smi->irq_cleanup = NULL;
3288 * Wait until we know that we are out of any interrupt
3289 * handlers might have been running before we freed the
3292 synchronize_sched();
3294 if (new_smi->si_sm) {
3295 if (new_smi->handlers)
3296 new_smi->handlers->cleanup(new_smi->si_sm);
3297 kfree(new_smi->si_sm);
3298 new_smi->si_sm = NULL;
3300 if (new_smi->addr_source_cleanup) {
3301 new_smi->addr_source_cleanup(new_smi);
3302 new_smi->addr_source_cleanup = NULL;
3304 if (new_smi->io_cleanup) {
3305 new_smi->io_cleanup(new_smi);
3306 new_smi->io_cleanup = NULL;
3309 if (new_smi->dev_registered) {
3310 platform_device_unregister(new_smi->pdev);
3311 new_smi->dev_registered = 0;
3317 static int __devinit init_ipmi_si(void)
3323 enum ipmi_addr_src type = SI_INVALID;
3329 /* Register the device drivers. */
3330 rv = driver_register(&ipmi_driver.driver);
3332 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
3337 /* Parse out the si_type string into its components. */
3340 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3342 str = strchr(str, ',');
3352 printk(KERN_INFO "IPMI System Interface driver.\n");
3354 hardcode_find_bmc();
3356 /* If the user gave us a device, they presumably want us to use it */
3357 mutex_lock(&smi_infos_lock);
3358 if (!list_empty(&smi_infos)) {
3359 mutex_unlock(&smi_infos_lock);
3362 mutex_unlock(&smi_infos_lock);
3365 rv = pci_register_driver(&ipmi_pci_driver);
3367 printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv);
3373 pnp_register_driver(&ipmi_pnp_driver);
3385 #ifdef CONFIG_PPC_OF
3386 of_register_platform_driver(&ipmi_of_platform_driver);
3390 /* We prefer devices with interrupts, but in the case of a machine
3391 with multiple BMCs we assume that there will be several instances
3392 of a given type so if we succeed in registering a type then also
3393 try to register everything else of the same type */
3395 mutex_lock(&smi_infos_lock);
3396 list_for_each_entry(e, &smi_infos, link) {
3397 /* Try to register a device if it has an IRQ and we either
3398 haven't successfully registered a device yet or this
3399 device has the same type as one we successfully registered */
3400 if (e->irq && (!type || e->addr_source == type)) {
3401 if (!try_smi_init(e)) {
3402 type = e->addr_source;
3407 /* type will only have been set if we successfully registered an si */
3409 mutex_unlock(&smi_infos_lock);
3413 /* Fall back to the preferred device */
3415 list_for_each_entry(e, &smi_infos, link) {
3416 if (!e->irq && (!type || e->addr_source == type)) {
3417 if (!try_smi_init(e)) {
3418 type = e->addr_source;
3422 mutex_unlock(&smi_infos_lock);
3427 if (si_trydefaults) {
3428 mutex_lock(&smi_infos_lock);
3429 if (list_empty(&smi_infos)) {
3430 /* No BMC was found, try defaults. */
3431 mutex_unlock(&smi_infos_lock);
3434 mutex_unlock(&smi_infos_lock);
3437 mutex_lock(&smi_infos_lock);
3438 if (unload_when_empty && list_empty(&smi_infos)) {
3439 mutex_unlock(&smi_infos_lock);
3442 pci_unregister_driver(&ipmi_pci_driver);
3445 #ifdef CONFIG_PPC_OF
3447 of_unregister_platform_driver(&ipmi_of_platform_driver);
3449 driver_unregister(&ipmi_driver.driver);
3450 printk(KERN_WARNING PFX
3451 "Unable to find any System Interface(s)\n");
3454 mutex_unlock(&smi_infos_lock);
3458 module_init(init_ipmi_si);
3460 static void cleanup_one_si(struct smi_info *to_clean)
3463 unsigned long flags;
3468 list_del(&to_clean->link);
3470 /* Tell the driver that we are shutting down. */
3471 atomic_inc(&to_clean->stop_operation);
3474 * Make sure the timer and thread are stopped and will not run
3477 wait_for_timer_and_thread(to_clean);
3480 * Timeouts are stopped, now make sure the interrupts are off
3481 * for the device. A little tricky with locks to make sure
3482 * there are no races.
3484 spin_lock_irqsave(&to_clean->si_lock, flags);
3485 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3486 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3488 schedule_timeout_uninterruptible(1);
3489 spin_lock_irqsave(&to_clean->si_lock, flags);
3491 disable_si_irq(to_clean);
3492 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3493 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3495 schedule_timeout_uninterruptible(1);
3498 /* Clean up interrupts and make sure that everything is done. */
3499 if (to_clean->irq_cleanup)
3500 to_clean->irq_cleanup(to_clean);
3501 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3503 schedule_timeout_uninterruptible(1);
3507 rv = ipmi_unregister_smi(to_clean->intf);
3510 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3514 if (to_clean->handlers)
3515 to_clean->handlers->cleanup(to_clean->si_sm);
3517 kfree(to_clean->si_sm);
3519 if (to_clean->addr_source_cleanup)
3520 to_clean->addr_source_cleanup(to_clean);
3521 if (to_clean->io_cleanup)
3522 to_clean->io_cleanup(to_clean);
3524 if (to_clean->dev_registered)
3525 platform_device_unregister(to_clean->pdev);
3530 static void __exit cleanup_ipmi_si(void)
3532 struct smi_info *e, *tmp_e;
3539 pci_unregister_driver(&ipmi_pci_driver);
3543 pnp_unregister_driver(&ipmi_pnp_driver);
3546 #ifdef CONFIG_PPC_OF
3548 of_unregister_platform_driver(&ipmi_of_platform_driver);
3551 mutex_lock(&smi_infos_lock);
3552 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3554 mutex_unlock(&smi_infos_lock);
3556 driver_unregister(&ipmi_driver.driver);
3558 module_exit(cleanup_ipmi_si);
3560 MODULE_LICENSE("GPL");
3561 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3562 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3563 " system interfaces.");