4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/sched.h>
45 #include <linux/seq_file.h>
46 #include <linux/timer.h>
47 #include <linux/errno.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/list.h>
52 #include <linux/pci.h>
53 #include <linux/ioport.h>
54 #include <linux/notifier.h>
55 #include <linux/mutex.h>
56 #include <linux/kthread.h>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi.h>
61 #include <linux/ipmi_smi.h>
63 #include "ipmi_si_sm.h"
64 #include <linux/init.h>
65 #include <linux/dmi.h>
66 #include <linux/string.h>
67 #include <linux/ctype.h>
68 #include <linux/pnp.h>
69 #include <linux/of_device.h>
70 #include <linux/of_platform.h>
71 #include <linux/of_address.h>
72 #include <linux/of_irq.h>
74 #define PFX "ipmi_si: "
76 /* Measure times between events in the driver. */
79 /* Call every 10 ms. */
80 #define SI_TIMEOUT_TIME_USEC 10000
81 #define SI_USEC_PER_JIFFY (1000000/HZ)
82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
91 SI_CLEARING_FLAGS_THEN_SET_IRQ,
93 SI_ENABLE_INTERRUPTS1,
94 SI_ENABLE_INTERRUPTS2,
95 SI_DISABLE_INTERRUPTS1,
96 SI_DISABLE_INTERRUPTS2
97 /* FIXME - add watchdog stuff. */
100 /* Some BT-specific defines we need here. */
101 #define IPMI_BT_INTMASK_REG 2
102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106 SI_KCS, SI_SMIC, SI_BT
108 static char *si_to_str[] = { "kcs", "smic", "bt" };
110 static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
111 "ACPI", "SMBIOS", "PCI",
112 "device-tree", "default" };
114 #define DEVICE_NAME "ipmi_si"
116 static struct platform_driver ipmi_driver;
119 * Indexes into stats[] in smi_info below.
121 enum si_stat_indexes {
123 * Number of times the driver requested a timer while an operation
126 SI_STAT_short_timeouts = 0,
129 * Number of times the driver requested a timer while nothing was in
132 SI_STAT_long_timeouts,
134 /* Number of times the interface was idle while being polled. */
137 /* Number of interrupts the driver handled. */
140 /* Number of time the driver got an ATTN from the hardware. */
143 /* Number of times the driver requested flags from the hardware. */
144 SI_STAT_flag_fetches,
146 /* Number of times the hardware didn't follow the state machine. */
149 /* Number of completed messages. */
150 SI_STAT_complete_transactions,
152 /* Number of IPMI events received from the hardware. */
155 /* Number of watchdog pretimeouts. */
156 SI_STAT_watchdog_pretimeouts,
158 /* Number of asynchronous messages received. */
159 SI_STAT_incoming_messages,
162 /* This *must* remain last, add new values above this. */
169 struct si_sm_data *si_sm;
170 struct si_sm_handlers *handlers;
171 enum si_type si_type;
173 struct list_head xmit_msgs;
174 struct list_head hp_xmit_msgs;
175 struct ipmi_smi_msg *curr_msg;
176 enum si_intf_state si_state;
179 * Used to handle the various types of I/O that can occur with
183 int (*io_setup)(struct smi_info *info);
184 void (*io_cleanup)(struct smi_info *info);
185 int (*irq_setup)(struct smi_info *info);
186 void (*irq_cleanup)(struct smi_info *info);
187 unsigned int io_size;
188 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
189 void (*addr_source_cleanup)(struct smi_info *info);
190 void *addr_source_data;
193 * Per-OEM handler, called from handle_flags(). Returns 1
194 * when handle_flags() needs to be re-run or 0 indicating it
195 * set si_state itself.
197 int (*oem_data_avail_handler)(struct smi_info *smi_info);
200 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
201 * is set to hold the flags until we are done handling everything
204 #define RECEIVE_MSG_AVAIL 0x01
205 #define EVENT_MSG_BUFFER_FULL 0x02
206 #define WDT_PRE_TIMEOUT_INT 0x08
207 #define OEM0_DATA_AVAIL 0x20
208 #define OEM1_DATA_AVAIL 0x40
209 #define OEM2_DATA_AVAIL 0x80
210 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
213 unsigned char msg_flags;
215 /* Does the BMC have an event buffer? */
216 char has_event_buffer;
219 * If set to true, this will request events the next time the
220 * state machine is idle.
225 * If true, run the state machine to completion on every send
226 * call. Generally used after a panic to make sure stuff goes
229 int run_to_completion;
231 /* The I/O port of an SI interface. */
235 * The space between start addresses of the two ports. For
236 * instance, if the first port is 0xca2 and the spacing is 4, then
237 * the second port is 0xca6.
239 unsigned int spacing;
241 /* zero if no irq; */
244 /* The timer for this si. */
245 struct timer_list si_timer;
247 /* The time (in jiffies) the last timeout occurred at. */
248 unsigned long last_timeout_jiffies;
250 /* Used to gracefully stop the timer without race conditions. */
251 atomic_t stop_operation;
254 * The driver will disable interrupts when it gets into a
255 * situation where it cannot handle messages due to lack of
256 * memory. Once that situation clears up, it will re-enable
259 int interrupt_disabled;
261 /* From the get device id response... */
262 struct ipmi_device_id device_id;
264 /* Driver model stuff. */
266 struct platform_device *pdev;
269 * True if we allocated the device, false if it came from
270 * someplace else (like PCI).
274 /* Slave address, could be reported from DMI. */
275 unsigned char slave_addr;
277 /* Counters and things for the proc filesystem. */
278 atomic_t stats[SI_NUM_STATS];
280 struct task_struct *thread;
282 struct list_head link;
283 union ipmi_smi_info_union addr_info;
286 #define smi_inc_stat(smi, stat) \
287 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
288 #define smi_get_stat(smi, stat) \
289 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
291 #define SI_MAX_PARMS 4
293 static int force_kipmid[SI_MAX_PARMS];
294 static int num_force_kipmid;
296 static int pci_registered;
299 static int pnp_registered;
302 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
303 static int num_max_busy_us;
305 static int unload_when_empty = 1;
307 static int add_smi(struct smi_info *smi);
308 static int try_smi_init(struct smi_info *smi);
309 static void cleanup_one_si(struct smi_info *to_clean);
310 static void cleanup_ipmi_si(void);
312 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
313 static int register_xaction_notifier(struct notifier_block *nb)
315 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
318 static void deliver_recv_msg(struct smi_info *smi_info,
319 struct ipmi_smi_msg *msg)
321 /* Deliver the message to the upper layer. */
322 ipmi_smi_msg_received(smi_info->intf, msg);
325 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
327 struct ipmi_smi_msg *msg = smi_info->curr_msg;
329 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
330 cCode = IPMI_ERR_UNSPECIFIED;
331 /* else use it as is */
333 /* Make it a response */
334 msg->rsp[0] = msg->data[0] | 4;
335 msg->rsp[1] = msg->data[1];
339 smi_info->curr_msg = NULL;
340 deliver_recv_msg(smi_info, msg);
343 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
346 struct list_head *entry = NULL;
351 /* Pick the high priority queue first. */
352 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
353 entry = smi_info->hp_xmit_msgs.next;
354 } else if (!list_empty(&(smi_info->xmit_msgs))) {
355 entry = smi_info->xmit_msgs.next;
359 smi_info->curr_msg = NULL;
365 smi_info->curr_msg = list_entry(entry,
370 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
372 err = atomic_notifier_call_chain(&xaction_notifier_list,
374 if (err & NOTIFY_STOP_MASK) {
375 rv = SI_SM_CALL_WITHOUT_DELAY;
378 err = smi_info->handlers->start_transaction(
380 smi_info->curr_msg->data,
381 smi_info->curr_msg->data_size);
383 return_hosed_msg(smi_info, err);
385 rv = SI_SM_CALL_WITHOUT_DELAY;
391 static void start_enable_irq(struct smi_info *smi_info)
393 unsigned char msg[2];
396 * If we are enabling interrupts, we have to tell the
399 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
400 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
402 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
403 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
406 static void start_disable_irq(struct smi_info *smi_info)
408 unsigned char msg[2];
410 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
411 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
413 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
414 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
417 static void start_clear_flags(struct smi_info *smi_info)
419 unsigned char msg[3];
421 /* Make sure the watchdog pre-timeout flag is not set at startup. */
422 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
423 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
424 msg[2] = WDT_PRE_TIMEOUT_INT;
426 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
427 smi_info->si_state = SI_CLEARING_FLAGS;
431 * When we have a situtaion where we run out of memory and cannot
432 * allocate messages, we just leave them in the BMC and run the system
433 * polled until we can allocate some memory. Once we have some
434 * memory, we will re-enable the interrupt.
436 static inline void disable_si_irq(struct smi_info *smi_info)
438 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
439 start_disable_irq(smi_info);
440 smi_info->interrupt_disabled = 1;
441 if (!atomic_read(&smi_info->stop_operation))
442 mod_timer(&smi_info->si_timer,
443 jiffies + SI_TIMEOUT_JIFFIES);
447 static inline void enable_si_irq(struct smi_info *smi_info)
449 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
450 start_enable_irq(smi_info);
451 smi_info->interrupt_disabled = 0;
455 static void handle_flags(struct smi_info *smi_info)
458 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
459 /* Watchdog pre-timeout */
460 smi_inc_stat(smi_info, watchdog_pretimeouts);
462 start_clear_flags(smi_info);
463 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
464 ipmi_smi_watchdog_pretimeout(smi_info->intf);
465 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
466 /* Messages available. */
467 smi_info->curr_msg = ipmi_alloc_smi_msg();
468 if (!smi_info->curr_msg) {
469 disable_si_irq(smi_info);
470 smi_info->si_state = SI_NORMAL;
473 enable_si_irq(smi_info);
475 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
476 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
477 smi_info->curr_msg->data_size = 2;
479 smi_info->handlers->start_transaction(
481 smi_info->curr_msg->data,
482 smi_info->curr_msg->data_size);
483 smi_info->si_state = SI_GETTING_MESSAGES;
484 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
485 /* Events available. */
486 smi_info->curr_msg = ipmi_alloc_smi_msg();
487 if (!smi_info->curr_msg) {
488 disable_si_irq(smi_info);
489 smi_info->si_state = SI_NORMAL;
492 enable_si_irq(smi_info);
494 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
495 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
496 smi_info->curr_msg->data_size = 2;
498 smi_info->handlers->start_transaction(
500 smi_info->curr_msg->data,
501 smi_info->curr_msg->data_size);
502 smi_info->si_state = SI_GETTING_EVENTS;
503 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
504 smi_info->oem_data_avail_handler) {
505 if (smi_info->oem_data_avail_handler(smi_info))
508 smi_info->si_state = SI_NORMAL;
511 static void handle_transaction_done(struct smi_info *smi_info)
513 struct ipmi_smi_msg *msg;
518 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
520 switch (smi_info->si_state) {
522 if (!smi_info->curr_msg)
525 smi_info->curr_msg->rsp_size
526 = smi_info->handlers->get_result(
528 smi_info->curr_msg->rsp,
529 IPMI_MAX_MSG_LENGTH);
532 * Do this here becase deliver_recv_msg() releases the
533 * lock, and a new message can be put in during the
534 * time the lock is released.
536 msg = smi_info->curr_msg;
537 smi_info->curr_msg = NULL;
538 deliver_recv_msg(smi_info, msg);
541 case SI_GETTING_FLAGS:
543 unsigned char msg[4];
546 /* We got the flags from the SMI, now handle them. */
547 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
549 /* Error fetching flags, just give up for now. */
550 smi_info->si_state = SI_NORMAL;
551 } else if (len < 4) {
553 * Hmm, no flags. That's technically illegal, but
554 * don't use uninitialized data.
556 smi_info->si_state = SI_NORMAL;
558 smi_info->msg_flags = msg[3];
559 handle_flags(smi_info);
564 case SI_CLEARING_FLAGS:
565 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
567 unsigned char msg[3];
569 /* We cleared the flags. */
570 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
572 /* Error clearing flags */
573 dev_warn(smi_info->dev,
574 "Error clearing flags: %2.2x\n", msg[2]);
576 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
577 start_enable_irq(smi_info);
579 smi_info->si_state = SI_NORMAL;
583 case SI_GETTING_EVENTS:
585 smi_info->curr_msg->rsp_size
586 = smi_info->handlers->get_result(
588 smi_info->curr_msg->rsp,
589 IPMI_MAX_MSG_LENGTH);
592 * Do this here becase deliver_recv_msg() releases the
593 * lock, and a new message can be put in during the
594 * time the lock is released.
596 msg = smi_info->curr_msg;
597 smi_info->curr_msg = NULL;
598 if (msg->rsp[2] != 0) {
599 /* Error getting event, probably done. */
602 /* Take off the event flag. */
603 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
604 handle_flags(smi_info);
606 smi_inc_stat(smi_info, events);
609 * Do this before we deliver the message
610 * because delivering the message releases the
611 * lock and something else can mess with the
614 handle_flags(smi_info);
616 deliver_recv_msg(smi_info, msg);
621 case SI_GETTING_MESSAGES:
623 smi_info->curr_msg->rsp_size
624 = smi_info->handlers->get_result(
626 smi_info->curr_msg->rsp,
627 IPMI_MAX_MSG_LENGTH);
630 * Do this here becase deliver_recv_msg() releases the
631 * lock, and a new message can be put in during the
632 * time the lock is released.
634 msg = smi_info->curr_msg;
635 smi_info->curr_msg = NULL;
636 if (msg->rsp[2] != 0) {
637 /* Error getting event, probably done. */
640 /* Take off the msg flag. */
641 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
642 handle_flags(smi_info);
644 smi_inc_stat(smi_info, incoming_messages);
647 * Do this before we deliver the message
648 * because delivering the message releases the
649 * lock and something else can mess with the
652 handle_flags(smi_info);
654 deliver_recv_msg(smi_info, msg);
659 case SI_ENABLE_INTERRUPTS1:
661 unsigned char msg[4];
663 /* We got the flags from the SMI, now handle them. */
664 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
666 dev_warn(smi_info->dev, "Could not enable interrupts"
667 ", failed get, using polled mode.\n");
668 smi_info->si_state = SI_NORMAL;
670 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
671 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
673 IPMI_BMC_RCV_MSG_INTR |
674 IPMI_BMC_EVT_MSG_INTR);
675 smi_info->handlers->start_transaction(
676 smi_info->si_sm, msg, 3);
677 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
682 case SI_ENABLE_INTERRUPTS2:
684 unsigned char msg[4];
686 /* We got the flags from the SMI, now handle them. */
687 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
689 dev_warn(smi_info->dev, "Could not enable interrupts"
690 ", failed set, using polled mode.\n");
692 smi_info->interrupt_disabled = 0;
693 smi_info->si_state = SI_NORMAL;
697 case SI_DISABLE_INTERRUPTS1:
699 unsigned char msg[4];
701 /* We got the flags from the SMI, now handle them. */
702 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
704 dev_warn(smi_info->dev, "Could not disable interrupts"
706 smi_info->si_state = SI_NORMAL;
708 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
709 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
711 ~(IPMI_BMC_RCV_MSG_INTR |
712 IPMI_BMC_EVT_MSG_INTR));
713 smi_info->handlers->start_transaction(
714 smi_info->si_sm, msg, 3);
715 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
720 case SI_DISABLE_INTERRUPTS2:
722 unsigned char msg[4];
724 /* We got the flags from the SMI, now handle them. */
725 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
727 dev_warn(smi_info->dev, "Could not disable interrupts"
730 smi_info->si_state = SI_NORMAL;
737 * Called on timeouts and events. Timeouts should pass the elapsed
738 * time, interrupts should pass in zero. Must be called with
739 * si_lock held and interrupts disabled.
741 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
744 enum si_sm_result si_sm_result;
748 * There used to be a loop here that waited a little while
749 * (around 25us) before giving up. That turned out to be
750 * pointless, the minimum delays I was seeing were in the 300us
751 * range, which is far too long to wait in an interrupt. So
752 * we just run until the state machine tells us something
753 * happened or it needs a delay.
755 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
757 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
758 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
760 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
761 smi_inc_stat(smi_info, complete_transactions);
763 handle_transaction_done(smi_info);
764 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
765 } else if (si_sm_result == SI_SM_HOSED) {
766 smi_inc_stat(smi_info, hosed_count);
769 * Do the before return_hosed_msg, because that
772 smi_info->si_state = SI_NORMAL;
773 if (smi_info->curr_msg != NULL) {
775 * If we were handling a user message, format
776 * a response to send to the upper layer to
777 * tell it about the error.
779 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
781 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
785 * We prefer handling attn over new messages. But don't do
786 * this if there is not yet an upper layer to handle anything.
788 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
789 unsigned char msg[2];
791 smi_inc_stat(smi_info, attentions);
794 * Got a attn, send down a get message flags to see
795 * what's causing it. It would be better to handle
796 * this in the upper layer, but due to the way
797 * interrupts work with the SMI, that's not really
800 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
801 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
803 smi_info->handlers->start_transaction(
804 smi_info->si_sm, msg, 2);
805 smi_info->si_state = SI_GETTING_FLAGS;
809 /* If we are currently idle, try to start the next message. */
810 if (si_sm_result == SI_SM_IDLE) {
811 smi_inc_stat(smi_info, idles);
813 si_sm_result = start_next_msg(smi_info);
814 if (si_sm_result != SI_SM_IDLE)
818 if ((si_sm_result == SI_SM_IDLE)
819 && (atomic_read(&smi_info->req_events))) {
821 * We are idle and the upper layer requested that I fetch
824 atomic_set(&smi_info->req_events, 0);
826 smi_info->curr_msg = ipmi_alloc_smi_msg();
827 if (!smi_info->curr_msg)
830 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
831 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
832 smi_info->curr_msg->data_size = 2;
834 smi_info->handlers->start_transaction(
836 smi_info->curr_msg->data,
837 smi_info->curr_msg->data_size);
838 smi_info->si_state = SI_GETTING_EVENTS;
845 static void sender(void *send_info,
846 struct ipmi_smi_msg *msg,
849 struct smi_info *smi_info = send_info;
850 enum si_sm_result result;
856 if (atomic_read(&smi_info->stop_operation)) {
857 msg->rsp[0] = msg->data[0] | 4;
858 msg->rsp[1] = msg->data[1];
859 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
861 deliver_recv_msg(smi_info, msg);
867 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
870 if (smi_info->run_to_completion) {
872 * If we are running to completion, then throw it in
873 * the list and run transactions until everything is
874 * clear. Priority doesn't matter here.
878 * Run to completion means we are single-threaded, no
881 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
883 result = smi_event_handler(smi_info, 0);
884 while (result != SI_SM_IDLE) {
885 udelay(SI_SHORT_TIMEOUT_USEC);
886 result = smi_event_handler(smi_info,
887 SI_SHORT_TIMEOUT_USEC);
892 spin_lock_irqsave(&smi_info->si_lock, flags);
894 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
896 list_add_tail(&msg->link, &smi_info->xmit_msgs);
898 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
900 * last_timeout_jiffies is updated here to avoid
901 * smi_timeout() handler passing very large time_diff
902 * value to smi_event_handler() that causes
903 * the send command to abort.
905 smi_info->last_timeout_jiffies = jiffies;
907 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
909 if (smi_info->thread)
910 wake_up_process(smi_info->thread);
912 start_next_msg(smi_info);
913 smi_event_handler(smi_info, 0);
915 spin_unlock_irqrestore(&smi_info->si_lock, flags);
918 static void set_run_to_completion(void *send_info, int i_run_to_completion)
920 struct smi_info *smi_info = send_info;
921 enum si_sm_result result;
923 smi_info->run_to_completion = i_run_to_completion;
924 if (i_run_to_completion) {
925 result = smi_event_handler(smi_info, 0);
926 while (result != SI_SM_IDLE) {
927 udelay(SI_SHORT_TIMEOUT_USEC);
928 result = smi_event_handler(smi_info,
929 SI_SHORT_TIMEOUT_USEC);
935 * Use -1 in the nsec value of the busy waiting timespec to tell that
936 * we are spinning in kipmid looking for something and not delaying
939 static inline void ipmi_si_set_not_busy(struct timespec *ts)
943 static inline int ipmi_si_is_busy(struct timespec *ts)
945 return ts->tv_nsec != -1;
948 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
949 const struct smi_info *smi_info,
950 struct timespec *busy_until)
952 unsigned int max_busy_us = 0;
954 if (smi_info->intf_num < num_max_busy_us)
955 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
956 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
957 ipmi_si_set_not_busy(busy_until);
958 else if (!ipmi_si_is_busy(busy_until)) {
959 getnstimeofday(busy_until);
960 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
963 getnstimeofday(&now);
964 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
965 ipmi_si_set_not_busy(busy_until);
974 * A busy-waiting loop for speeding up IPMI operation.
976 * Lousy hardware makes this hard. This is only enabled for systems
977 * that are not BT and do not have interrupts. It starts spinning
978 * when an operation is complete or until max_busy tells it to stop
979 * (if that is enabled). See the paragraph on kimid_max_busy_us in
980 * Documentation/IPMI.txt for details.
982 static int ipmi_thread(void *data)
984 struct smi_info *smi_info = data;
986 enum si_sm_result smi_result;
987 struct timespec busy_until;
989 ipmi_si_set_not_busy(&busy_until);
990 set_user_nice(current, 19);
991 while (!kthread_should_stop()) {
994 spin_lock_irqsave(&(smi_info->si_lock), flags);
995 smi_result = smi_event_handler(smi_info, 0);
996 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
997 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
999 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1001 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1003 else if (smi_result == SI_SM_IDLE)
1004 schedule_timeout_interruptible(100);
1006 schedule_timeout_interruptible(1);
1012 static void poll(void *send_info)
1014 struct smi_info *smi_info = send_info;
1015 unsigned long flags = 0;
1016 int run_to_completion = smi_info->run_to_completion;
1019 * Make sure there is some delay in the poll loop so we can
1020 * drive time forward and timeout things.
1023 if (!run_to_completion)
1024 spin_lock_irqsave(&smi_info->si_lock, flags);
1025 smi_event_handler(smi_info, 10);
1026 if (!run_to_completion)
1027 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1030 static void request_events(void *send_info)
1032 struct smi_info *smi_info = send_info;
1034 if (atomic_read(&smi_info->stop_operation) ||
1035 !smi_info->has_event_buffer)
1038 atomic_set(&smi_info->req_events, 1);
1041 static int initialized;
1043 static void smi_timeout(unsigned long data)
1045 struct smi_info *smi_info = (struct smi_info *) data;
1046 enum si_sm_result smi_result;
1047 unsigned long flags;
1048 unsigned long jiffies_now;
1055 spin_lock_irqsave(&(smi_info->si_lock), flags);
1057 do_gettimeofday(&t);
1058 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1060 jiffies_now = jiffies;
1061 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1062 * SI_USEC_PER_JIFFY);
1063 smi_result = smi_event_handler(smi_info, time_diff);
1065 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1067 smi_info->last_timeout_jiffies = jiffies_now;
1069 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1070 /* Running with interrupts, only do long timeouts. */
1071 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1072 smi_inc_stat(smi_info, long_timeouts);
1077 * If the state machine asks for a short delay, then shorten
1078 * the timer timeout.
1080 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1081 smi_inc_stat(smi_info, short_timeouts);
1082 timeout = jiffies + 1;
1084 smi_inc_stat(smi_info, long_timeouts);
1085 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1089 if (smi_result != SI_SM_IDLE)
1090 mod_timer(&(smi_info->si_timer), timeout);
1093 static irqreturn_t si_irq_handler(int irq, void *data)
1095 struct smi_info *smi_info = data;
1096 unsigned long flags;
1101 spin_lock_irqsave(&(smi_info->si_lock), flags);
1103 smi_inc_stat(smi_info, interrupts);
1106 do_gettimeofday(&t);
1107 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1109 smi_event_handler(smi_info, 0);
1110 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1114 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1116 struct smi_info *smi_info = data;
1117 /* We need to clear the IRQ flag for the BT interface. */
1118 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1119 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1120 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1121 return si_irq_handler(irq, data);
1124 static int smi_start_processing(void *send_info,
1127 struct smi_info *new_smi = send_info;
1130 new_smi->intf = intf;
1132 /* Try to claim any interrupts. */
1133 if (new_smi->irq_setup)
1134 new_smi->irq_setup(new_smi);
1136 /* Set up the timer that drives the interface. */
1137 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1138 new_smi->last_timeout_jiffies = jiffies;
1139 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1142 * Check if the user forcefully enabled the daemon.
1144 if (new_smi->intf_num < num_force_kipmid)
1145 enable = force_kipmid[new_smi->intf_num];
1147 * The BT interface is efficient enough to not need a thread,
1148 * and there is no need for a thread if we have interrupts.
1150 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1154 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1155 "kipmi%d", new_smi->intf_num);
1156 if (IS_ERR(new_smi->thread)) {
1157 dev_notice(new_smi->dev, "Could not start"
1158 " kernel thread due to error %ld, only using"
1159 " timers to drive the interface\n",
1160 PTR_ERR(new_smi->thread));
1161 new_smi->thread = NULL;
1168 static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1170 struct smi_info *smi = send_info;
1172 data->addr_src = smi->addr_source;
1173 data->dev = smi->dev;
1174 data->addr_info = smi->addr_info;
1175 get_device(smi->dev);
1180 static void set_maintenance_mode(void *send_info, int enable)
1182 struct smi_info *smi_info = send_info;
1185 atomic_set(&smi_info->req_events, 0);
1188 static struct ipmi_smi_handlers handlers = {
1189 .owner = THIS_MODULE,
1190 .start_processing = smi_start_processing,
1191 .get_smi_info = get_smi_info,
1193 .request_events = request_events,
1194 .set_maintenance_mode = set_maintenance_mode,
1195 .set_run_to_completion = set_run_to_completion,
1200 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1201 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1204 static LIST_HEAD(smi_infos);
1205 static DEFINE_MUTEX(smi_infos_lock);
1206 static int smi_num; /* Used to sequence the SMIs */
1208 #define DEFAULT_REGSPACING 1
1209 #define DEFAULT_REGSIZE 1
1212 static bool si_tryacpi = 1;
1215 static bool si_trydmi = 1;
1217 static bool si_tryplatform = 1;
1219 static bool si_trypci = 1;
1221 static bool 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"
1252 module_param_named(tryacpi, si_tryacpi, bool, 0);
1253 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1254 " default scan of the interfaces identified via ACPI");
1257 module_param_named(trydmi, si_trydmi, bool, 0);
1258 MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
1259 " default scan of the interfaces identified via DMI");
1261 module_param_named(tryplatform, si_tryplatform, bool, 0);
1262 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1263 " default scan of the interfaces identified via platform"
1264 " interfaces like openfirmware");
1266 module_param_named(trypci, si_trypci, bool, 0);
1267 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1268 " default scan of the interfaces identified via pci");
1270 module_param_named(trydefaults, si_trydefaults, bool, 0);
1271 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1272 " default scan of the KCS and SMIC interface at the standard"
1274 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1275 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1276 " interface separated by commas. The types are 'kcs',"
1277 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1278 " the first interface to kcs and the second to bt");
1279 module_param_array(addrs, ulong, &num_addrs, 0);
1280 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1281 " addresses separated by commas. Only use if an interface"
1282 " is in memory. Otherwise, set it to zero or leave"
1284 module_param_array(ports, uint, &num_ports, 0);
1285 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1286 " addresses separated by commas. Only use if an interface"
1287 " is a port. Otherwise, set it to zero or leave"
1289 module_param_array(irqs, int, &num_irqs, 0);
1290 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1291 " addresses separated by commas. Only use if an interface"
1292 " has an interrupt. Otherwise, set it to zero or leave"
1294 module_param_array(regspacings, int, &num_regspacings, 0);
1295 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1296 " and each successive register used by the interface. For"
1297 " instance, if the start address is 0xca2 and the spacing"
1298 " is 2, then the second address is at 0xca4. Defaults"
1300 module_param_array(regsizes, int, &num_regsizes, 0);
1301 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1302 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1303 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1304 " the 8-bit IPMI register has to be read from a larger"
1306 module_param_array(regshifts, int, &num_regshifts, 0);
1307 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1308 " IPMI register, in bits. For instance, if the data"
1309 " is read from a 32-bit word and the IPMI data is in"
1310 " bit 8-15, then the shift would be 8");
1311 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1312 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1313 " the controller. Normally this is 0x20, but can be"
1314 " overridden by this parm. This is an array indexed"
1315 " by interface number.");
1316 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1317 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1318 " disabled(0). Normally the IPMI driver auto-detects"
1319 " this, but the value may be overridden by this parm.");
1320 module_param(unload_when_empty, int, 0);
1321 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1322 " specified or found, default is 1. Setting to 0"
1323 " is useful for hot add of devices using hotmod.");
1324 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1325 MODULE_PARM_DESC(kipmid_max_busy_us,
1326 "Max time (in microseconds) to busy-wait for IPMI data before"
1327 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1328 " if kipmid is using up a lot of CPU time.");
1331 static void std_irq_cleanup(struct smi_info *info)
1333 if (info->si_type == SI_BT)
1334 /* Disable the interrupt in the BT interface. */
1335 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1336 free_irq(info->irq, info);
1339 static int std_irq_setup(struct smi_info *info)
1346 if (info->si_type == SI_BT) {
1347 rv = request_irq(info->irq,
1349 IRQF_SHARED | IRQF_DISABLED,
1353 /* Enable the interrupt in the BT interface. */
1354 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1355 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1357 rv = request_irq(info->irq,
1359 IRQF_SHARED | IRQF_DISABLED,
1363 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1364 " running polled\n",
1365 DEVICE_NAME, info->irq);
1368 info->irq_cleanup = std_irq_cleanup;
1369 dev_info(info->dev, "Using irq %d\n", info->irq);
1375 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1377 unsigned int addr = io->addr_data;
1379 return inb(addr + (offset * io->regspacing));
1382 static void port_outb(struct si_sm_io *io, unsigned int offset,
1385 unsigned int addr = io->addr_data;
1387 outb(b, addr + (offset * io->regspacing));
1390 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1392 unsigned int addr = io->addr_data;
1394 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1397 static void port_outw(struct si_sm_io *io, unsigned int offset,
1400 unsigned int addr = io->addr_data;
1402 outw(b << io->regshift, addr + (offset * io->regspacing));
1405 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1407 unsigned int addr = io->addr_data;
1409 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1412 static void port_outl(struct si_sm_io *io, unsigned int offset,
1415 unsigned int addr = io->addr_data;
1417 outl(b << io->regshift, addr+(offset * io->regspacing));
1420 static void port_cleanup(struct smi_info *info)
1422 unsigned int addr = info->io.addr_data;
1426 for (idx = 0; idx < info->io_size; idx++)
1427 release_region(addr + idx * info->io.regspacing,
1432 static int port_setup(struct smi_info *info)
1434 unsigned int addr = info->io.addr_data;
1440 info->io_cleanup = port_cleanup;
1443 * Figure out the actual inb/inw/inl/etc routine to use based
1444 * upon the register size.
1446 switch (info->io.regsize) {
1448 info->io.inputb = port_inb;
1449 info->io.outputb = port_outb;
1452 info->io.inputb = port_inw;
1453 info->io.outputb = port_outw;
1456 info->io.inputb = port_inl;
1457 info->io.outputb = port_outl;
1460 dev_warn(info->dev, "Invalid register size: %d\n",
1466 * Some BIOSes reserve disjoint I/O regions in their ACPI
1467 * tables. This causes problems when trying to register the
1468 * entire I/O region. Therefore we must register each I/O
1471 for (idx = 0; idx < info->io_size; idx++) {
1472 if (request_region(addr + idx * info->io.regspacing,
1473 info->io.regsize, DEVICE_NAME) == NULL) {
1474 /* Undo allocations */
1476 release_region(addr + idx * info->io.regspacing,
1485 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1487 return readb((io->addr)+(offset * io->regspacing));
1490 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1493 writeb(b, (io->addr)+(offset * io->regspacing));
1496 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1498 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1502 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1505 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1508 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1510 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1514 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1517 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1521 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1523 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1527 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1530 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1534 static void mem_cleanup(struct smi_info *info)
1536 unsigned long addr = info->io.addr_data;
1539 if (info->io.addr) {
1540 iounmap(info->io.addr);
1542 mapsize = ((info->io_size * info->io.regspacing)
1543 - (info->io.regspacing - info->io.regsize));
1545 release_mem_region(addr, mapsize);
1549 static int mem_setup(struct smi_info *info)
1551 unsigned long addr = info->io.addr_data;
1557 info->io_cleanup = mem_cleanup;
1560 * Figure out the actual readb/readw/readl/etc routine to use based
1561 * upon the register size.
1563 switch (info->io.regsize) {
1565 info->io.inputb = intf_mem_inb;
1566 info->io.outputb = intf_mem_outb;
1569 info->io.inputb = intf_mem_inw;
1570 info->io.outputb = intf_mem_outw;
1573 info->io.inputb = intf_mem_inl;
1574 info->io.outputb = intf_mem_outl;
1578 info->io.inputb = mem_inq;
1579 info->io.outputb = mem_outq;
1583 dev_warn(info->dev, "Invalid register size: %d\n",
1589 * Calculate the total amount of memory to claim. This is an
1590 * unusual looking calculation, but it avoids claiming any
1591 * more memory than it has to. It will claim everything
1592 * between the first address to the end of the last full
1595 mapsize = ((info->io_size * info->io.regspacing)
1596 - (info->io.regspacing - info->io.regsize));
1598 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1601 info->io.addr = ioremap(addr, mapsize);
1602 if (info->io.addr == NULL) {
1603 release_mem_region(addr, mapsize);
1610 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1611 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1619 enum hotmod_op { HM_ADD, HM_REMOVE };
1620 struct hotmod_vals {
1624 static struct hotmod_vals hotmod_ops[] = {
1626 { "remove", HM_REMOVE },
1629 static struct hotmod_vals hotmod_si[] = {
1631 { "smic", SI_SMIC },
1635 static struct hotmod_vals hotmod_as[] = {
1636 { "mem", IPMI_MEM_ADDR_SPACE },
1637 { "i/o", IPMI_IO_ADDR_SPACE },
1641 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1646 s = strchr(*curr, ',');
1648 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1653 for (i = 0; hotmod_ops[i].name; i++) {
1654 if (strcmp(*curr, v[i].name) == 0) {
1661 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1665 static int check_hotmod_int_op(const char *curr, const char *option,
1666 const char *name, int *val)
1670 if (strcmp(curr, name) == 0) {
1672 printk(KERN_WARNING PFX
1673 "No option given for '%s'\n",
1677 *val = simple_strtoul(option, &n, 0);
1678 if ((*n != '\0') || (*option == '\0')) {
1679 printk(KERN_WARNING PFX
1680 "Bad option given for '%s'\n",
1689 static struct smi_info *smi_info_alloc(void)
1691 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1694 spin_lock_init(&info->si_lock);
1698 static int hotmod_handler(const char *val, struct kernel_param *kp)
1700 char *str = kstrdup(val, GFP_KERNEL);
1702 char *next, *curr, *s, *n, *o;
1704 enum si_type si_type;
1714 struct smi_info *info;
1719 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1722 while ((ival >= 0) && isspace(str[ival])) {
1727 for (curr = str; curr; curr = next) {
1732 ipmb = 0; /* Choose the default if not specified */
1734 next = strchr(curr, ':');
1740 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1745 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1750 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1754 s = strchr(curr, ',');
1759 addr = simple_strtoul(curr, &n, 0);
1760 if ((*n != '\0') || (*curr == '\0')) {
1761 printk(KERN_WARNING PFX "Invalid hotmod address"
1768 s = strchr(curr, ',');
1773 o = strchr(curr, '=');
1778 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1783 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1788 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1793 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1798 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1805 printk(KERN_WARNING PFX
1806 "Invalid hotmod option '%s'\n",
1812 info = smi_info_alloc();
1818 info->addr_source = SI_HOTMOD;
1819 info->si_type = si_type;
1820 info->io.addr_data = addr;
1821 info->io.addr_type = addr_space;
1822 if (addr_space == IPMI_MEM_ADDR_SPACE)
1823 info->io_setup = mem_setup;
1825 info->io_setup = port_setup;
1827 info->io.addr = NULL;
1828 info->io.regspacing = regspacing;
1829 if (!info->io.regspacing)
1830 info->io.regspacing = DEFAULT_REGSPACING;
1831 info->io.regsize = regsize;
1832 if (!info->io.regsize)
1833 info->io.regsize = DEFAULT_REGSPACING;
1834 info->io.regshift = regshift;
1837 info->irq_setup = std_irq_setup;
1838 info->slave_addr = ipmb;
1840 if (!add_smi(info)) {
1841 if (try_smi_init(info))
1842 cleanup_one_si(info);
1848 struct smi_info *e, *tmp_e;
1850 mutex_lock(&smi_infos_lock);
1851 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1852 if (e->io.addr_type != addr_space)
1854 if (e->si_type != si_type)
1856 if (e->io.addr_data == addr)
1859 mutex_unlock(&smi_infos_lock);
1868 static int hardcode_find_bmc(void)
1872 struct smi_info *info;
1874 for (i = 0; i < SI_MAX_PARMS; i++) {
1875 if (!ports[i] && !addrs[i])
1878 info = smi_info_alloc();
1882 info->addr_source = SI_HARDCODED;
1883 printk(KERN_INFO PFX "probing via hardcoded address\n");
1885 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1886 info->si_type = SI_KCS;
1887 } else if (strcmp(si_type[i], "smic") == 0) {
1888 info->si_type = SI_SMIC;
1889 } else if (strcmp(si_type[i], "bt") == 0) {
1890 info->si_type = SI_BT;
1892 printk(KERN_WARNING PFX "Interface type specified "
1893 "for interface %d, was invalid: %s\n",
1901 info->io_setup = port_setup;
1902 info->io.addr_data = ports[i];
1903 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1904 } else if (addrs[i]) {
1906 info->io_setup = mem_setup;
1907 info->io.addr_data = addrs[i];
1908 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1910 printk(KERN_WARNING PFX "Interface type specified "
1911 "for interface %d, but port and address were "
1912 "not set or set to zero.\n", i);
1917 info->io.addr = NULL;
1918 info->io.regspacing = regspacings[i];
1919 if (!info->io.regspacing)
1920 info->io.regspacing = DEFAULT_REGSPACING;
1921 info->io.regsize = regsizes[i];
1922 if (!info->io.regsize)
1923 info->io.regsize = DEFAULT_REGSPACING;
1924 info->io.regshift = regshifts[i];
1925 info->irq = irqs[i];
1927 info->irq_setup = std_irq_setup;
1928 info->slave_addr = slave_addrs[i];
1930 if (!add_smi(info)) {
1931 if (try_smi_init(info))
1932 cleanup_one_si(info);
1943 #include <linux/acpi.h>
1946 * Once we get an ACPI failure, we don't try any more, because we go
1947 * through the tables sequentially. Once we don't find a table, there
1950 static int acpi_failure;
1952 /* For GPE-type interrupts. */
1953 static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
1954 u32 gpe_number, void *context)
1956 struct smi_info *smi_info = context;
1957 unsigned long flags;
1962 spin_lock_irqsave(&(smi_info->si_lock), flags);
1964 smi_inc_stat(smi_info, interrupts);
1967 do_gettimeofday(&t);
1968 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1970 smi_event_handler(smi_info, 0);
1971 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1973 return ACPI_INTERRUPT_HANDLED;
1976 static void acpi_gpe_irq_cleanup(struct smi_info *info)
1981 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1984 static int acpi_gpe_irq_setup(struct smi_info *info)
1991 /* FIXME - is level triggered right? */
1992 status = acpi_install_gpe_handler(NULL,
1994 ACPI_GPE_LEVEL_TRIGGERED,
1997 if (status != AE_OK) {
1998 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1999 " running polled\n", DEVICE_NAME, info->irq);
2003 info->irq_cleanup = acpi_gpe_irq_cleanup;
2004 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
2011 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2022 s8 CreatorRevision[4];
2025 s16 SpecificationRevision;
2028 * Bit 0 - SCI interrupt supported
2029 * Bit 1 - I/O APIC/SAPIC
2034 * If bit 0 of InterruptType is set, then this is the SCI
2035 * interrupt in the GPEx_STS register.
2042 * If bit 1 of InterruptType is set, then this is the I/O
2043 * APIC/SAPIC interrupt.
2045 u32 GlobalSystemInterrupt;
2047 /* The actual register address. */
2048 struct acpi_generic_address addr;
2052 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2055 static int try_init_spmi(struct SPMITable *spmi)
2057 struct smi_info *info;
2059 if (spmi->IPMIlegacy != 1) {
2060 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2064 info = smi_info_alloc();
2066 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2070 info->addr_source = SI_SPMI;
2071 printk(KERN_INFO PFX "probing via SPMI\n");
2073 /* Figure out the interface type. */
2074 switch (spmi->InterfaceType) {
2076 info->si_type = SI_KCS;
2079 info->si_type = SI_SMIC;
2082 info->si_type = SI_BT;
2085 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2086 spmi->InterfaceType);
2091 if (spmi->InterruptType & 1) {
2092 /* We've got a GPE interrupt. */
2093 info->irq = spmi->GPE;
2094 info->irq_setup = acpi_gpe_irq_setup;
2095 } else if (spmi->InterruptType & 2) {
2096 /* We've got an APIC/SAPIC interrupt. */
2097 info->irq = spmi->GlobalSystemInterrupt;
2098 info->irq_setup = std_irq_setup;
2100 /* Use the default interrupt setting. */
2102 info->irq_setup = NULL;
2105 if (spmi->addr.bit_width) {
2106 /* A (hopefully) properly formed register bit width. */
2107 info->io.regspacing = spmi->addr.bit_width / 8;
2109 info->io.regspacing = DEFAULT_REGSPACING;
2111 info->io.regsize = info->io.regspacing;
2112 info->io.regshift = spmi->addr.bit_offset;
2114 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2115 info->io_setup = mem_setup;
2116 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2117 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2118 info->io_setup = port_setup;
2119 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2122 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2125 info->io.addr_data = spmi->addr.address;
2127 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2128 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2129 info->io.addr_data, info->io.regsize, info->io.regspacing,
2138 static void spmi_find_bmc(void)
2141 struct SPMITable *spmi;
2150 for (i = 0; ; i++) {
2151 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2152 (struct acpi_table_header **)&spmi);
2153 if (status != AE_OK)
2156 try_init_spmi(spmi);
2160 static int ipmi_pnp_probe(struct pnp_dev *dev,
2161 const struct pnp_device_id *dev_id)
2163 struct acpi_device *acpi_dev;
2164 struct smi_info *info;
2165 struct resource *res, *res_second;
2168 unsigned long long tmp;
2170 acpi_dev = pnp_acpi_device(dev);
2174 info = smi_info_alloc();
2178 info->addr_source = SI_ACPI;
2179 printk(KERN_INFO PFX "probing via ACPI\n");
2181 handle = acpi_dev->handle;
2182 info->addr_info.acpi_info.acpi_handle = handle;
2184 /* _IFT tells us the interface type: KCS, BT, etc */
2185 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2186 if (ACPI_FAILURE(status))
2191 info->si_type = SI_KCS;
2194 info->si_type = SI_SMIC;
2197 info->si_type = SI_BT;
2200 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2204 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2206 info->io_setup = port_setup;
2207 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2209 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2211 info->io_setup = mem_setup;
2212 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2216 dev_err(&dev->dev, "no I/O or memory address\n");
2219 info->io.addr_data = res->start;
2221 info->io.regspacing = DEFAULT_REGSPACING;
2222 res_second = pnp_get_resource(dev,
2223 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2224 IORESOURCE_IO : IORESOURCE_MEM,
2227 if (res_second->start > info->io.addr_data)
2228 info->io.regspacing = res_second->start - info->io.addr_data;
2230 info->io.regsize = DEFAULT_REGSPACING;
2231 info->io.regshift = 0;
2233 /* If _GPE exists, use it; otherwise use standard interrupts */
2234 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2235 if (ACPI_SUCCESS(status)) {
2237 info->irq_setup = acpi_gpe_irq_setup;
2238 } else if (pnp_irq_valid(dev, 0)) {
2239 info->irq = pnp_irq(dev, 0);
2240 info->irq_setup = std_irq_setup;
2243 info->dev = &dev->dev;
2244 pnp_set_drvdata(dev, info);
2246 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2247 res, info->io.regsize, info->io.regspacing,
2260 static void ipmi_pnp_remove(struct pnp_dev *dev)
2262 struct smi_info *info = pnp_get_drvdata(dev);
2264 cleanup_one_si(info);
2267 static const struct pnp_device_id pnp_dev_table[] = {
2272 static struct pnp_driver ipmi_pnp_driver = {
2273 .name = DEVICE_NAME,
2274 .probe = ipmi_pnp_probe,
2275 .remove = ipmi_pnp_remove,
2276 .id_table = pnp_dev_table,
2281 struct dmi_ipmi_data {
2284 unsigned long base_addr;
2290 static int decode_dmi(const struct dmi_header *dm,
2291 struct dmi_ipmi_data *dmi)
2293 const u8 *data = (const u8 *)dm;
2294 unsigned long base_addr;
2296 u8 len = dm->length;
2298 dmi->type = data[4];
2300 memcpy(&base_addr, data+8, sizeof(unsigned long));
2302 if (base_addr & 1) {
2304 base_addr &= 0xFFFE;
2305 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2308 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2310 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2312 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2314 dmi->irq = data[0x11];
2316 /* The top two bits of byte 0x10 hold the register spacing. */
2317 reg_spacing = (data[0x10] & 0xC0) >> 6;
2318 switch (reg_spacing) {
2319 case 0x00: /* Byte boundaries */
2322 case 0x01: /* 32-bit boundaries */
2325 case 0x02: /* 16-byte boundaries */
2329 /* Some other interface, just ignore it. */
2335 * Note that technically, the lower bit of the base
2336 * address should be 1 if the address is I/O and 0 if
2337 * the address is in memory. So many systems get that
2338 * wrong (and all that I have seen are I/O) so we just
2339 * ignore that bit and assume I/O. Systems that use
2340 * memory should use the newer spec, anyway.
2342 dmi->base_addr = base_addr & 0xfffe;
2343 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2347 dmi->slave_addr = data[6];
2352 static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2354 struct smi_info *info;
2356 info = smi_info_alloc();
2358 printk(KERN_ERR PFX "Could not allocate SI data\n");
2362 info->addr_source = SI_SMBIOS;
2363 printk(KERN_INFO PFX "probing via SMBIOS\n");
2365 switch (ipmi_data->type) {
2366 case 0x01: /* KCS */
2367 info->si_type = SI_KCS;
2369 case 0x02: /* SMIC */
2370 info->si_type = SI_SMIC;
2373 info->si_type = SI_BT;
2380 switch (ipmi_data->addr_space) {
2381 case IPMI_MEM_ADDR_SPACE:
2382 info->io_setup = mem_setup;
2383 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2386 case IPMI_IO_ADDR_SPACE:
2387 info->io_setup = port_setup;
2388 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2393 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2394 ipmi_data->addr_space);
2397 info->io.addr_data = ipmi_data->base_addr;
2399 info->io.regspacing = ipmi_data->offset;
2400 if (!info->io.regspacing)
2401 info->io.regspacing = DEFAULT_REGSPACING;
2402 info->io.regsize = DEFAULT_REGSPACING;
2403 info->io.regshift = 0;
2405 info->slave_addr = ipmi_data->slave_addr;
2407 info->irq = ipmi_data->irq;
2409 info->irq_setup = std_irq_setup;
2411 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2412 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2413 info->io.addr_data, info->io.regsize, info->io.regspacing,
2420 static void dmi_find_bmc(void)
2422 const struct dmi_device *dev = NULL;
2423 struct dmi_ipmi_data data;
2426 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2427 memset(&data, 0, sizeof(data));
2428 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2431 try_init_dmi(&data);
2434 #endif /* CONFIG_DMI */
2438 #define PCI_ERMC_CLASSCODE 0x0C0700
2439 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2440 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2441 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2442 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2443 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2445 #define PCI_HP_VENDOR_ID 0x103C
2446 #define PCI_MMC_DEVICE_ID 0x121A
2447 #define PCI_MMC_ADDR_CW 0x10
2449 static void ipmi_pci_cleanup(struct smi_info *info)
2451 struct pci_dev *pdev = info->addr_source_data;
2453 pci_disable_device(pdev);
2456 static int ipmi_pci_probe_regspacing(struct smi_info *info)
2458 if (info->si_type == SI_KCS) {
2459 unsigned char status;
2462 info->io.regsize = DEFAULT_REGSIZE;
2463 info->io.regshift = 0;
2465 info->handlers = &kcs_smi_handlers;
2467 /* detect 1, 4, 16byte spacing */
2468 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
2469 info->io.regspacing = regspacing;
2470 if (info->io_setup(info)) {
2472 "Could not setup I/O space\n");
2473 return DEFAULT_REGSPACING;
2475 /* write invalid cmd */
2476 info->io.outputb(&info->io, 1, 0x10);
2477 /* read status back */
2478 status = info->io.inputb(&info->io, 1);
2479 info->io_cleanup(info);
2485 return DEFAULT_REGSPACING;
2488 static int ipmi_pci_probe(struct pci_dev *pdev,
2489 const struct pci_device_id *ent)
2492 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2493 struct smi_info *info;
2495 info = smi_info_alloc();
2499 info->addr_source = SI_PCI;
2500 dev_info(&pdev->dev, "probing via PCI");
2502 switch (class_type) {
2503 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2504 info->si_type = SI_SMIC;
2507 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2508 info->si_type = SI_KCS;
2511 case PCI_ERMC_CLASSCODE_TYPE_BT:
2512 info->si_type = SI_BT;
2517 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2521 rv = pci_enable_device(pdev);
2523 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2528 info->addr_source_cleanup = ipmi_pci_cleanup;
2529 info->addr_source_data = pdev;
2531 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2532 info->io_setup = port_setup;
2533 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2535 info->io_setup = mem_setup;
2536 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2538 info->io.addr_data = pci_resource_start(pdev, 0);
2540 info->io.regspacing = ipmi_pci_probe_regspacing(info);
2541 info->io.regsize = DEFAULT_REGSIZE;
2542 info->io.regshift = 0;
2544 info->irq = pdev->irq;
2546 info->irq_setup = std_irq_setup;
2548 info->dev = &pdev->dev;
2549 pci_set_drvdata(pdev, info);
2551 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2552 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2561 static void ipmi_pci_remove(struct pci_dev *pdev)
2563 struct smi_info *info = pci_get_drvdata(pdev);
2564 cleanup_one_si(info);
2567 static struct pci_device_id ipmi_pci_devices[] = {
2568 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2569 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2572 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2574 static struct pci_driver ipmi_pci_driver = {
2575 .name = DEVICE_NAME,
2576 .id_table = ipmi_pci_devices,
2577 .probe = ipmi_pci_probe,
2578 .remove = ipmi_pci_remove,
2580 #endif /* CONFIG_PCI */
2582 static struct of_device_id ipmi_match[];
2583 static int ipmi_probe(struct platform_device *dev)
2586 const struct of_device_id *match;
2587 struct smi_info *info;
2588 struct resource resource;
2589 const __be32 *regsize, *regspacing, *regshift;
2590 struct device_node *np = dev->dev.of_node;
2594 dev_info(&dev->dev, "probing via device tree\n");
2596 match = of_match_device(ipmi_match, &dev->dev);
2600 ret = of_address_to_resource(np, 0, &resource);
2602 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2606 regsize = of_get_property(np, "reg-size", &proplen);
2607 if (regsize && proplen != 4) {
2608 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2612 regspacing = of_get_property(np, "reg-spacing", &proplen);
2613 if (regspacing && proplen != 4) {
2614 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2618 regshift = of_get_property(np, "reg-shift", &proplen);
2619 if (regshift && proplen != 4) {
2620 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2624 info = smi_info_alloc();
2628 "could not allocate memory for OF probe\n");
2632 info->si_type = (enum si_type) match->data;
2633 info->addr_source = SI_DEVICETREE;
2634 info->irq_setup = std_irq_setup;
2636 if (resource.flags & IORESOURCE_IO) {
2637 info->io_setup = port_setup;
2638 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2640 info->io_setup = mem_setup;
2641 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2644 info->io.addr_data = resource.start;
2646 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2647 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2648 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2650 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2651 info->dev = &dev->dev;
2653 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2654 info->io.addr_data, info->io.regsize, info->io.regspacing,
2657 dev_set_drvdata(&dev->dev, info);
2659 if (add_smi(info)) {
2667 static int ipmi_remove(struct platform_device *dev)
2670 cleanup_one_si(dev_get_drvdata(&dev->dev));
2675 static struct of_device_id ipmi_match[] =
2677 { .type = "ipmi", .compatible = "ipmi-kcs",
2678 .data = (void *)(unsigned long) SI_KCS },
2679 { .type = "ipmi", .compatible = "ipmi-smic",
2680 .data = (void *)(unsigned long) SI_SMIC },
2681 { .type = "ipmi", .compatible = "ipmi-bt",
2682 .data = (void *)(unsigned long) SI_BT },
2686 static struct platform_driver ipmi_driver = {
2688 .name = DEVICE_NAME,
2689 .owner = THIS_MODULE,
2690 .of_match_table = ipmi_match,
2692 .probe = ipmi_probe,
2693 .remove = ipmi_remove,
2696 static int wait_for_msg_done(struct smi_info *smi_info)
2698 enum si_sm_result smi_result;
2700 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2702 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2703 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2704 schedule_timeout_uninterruptible(1);
2705 smi_result = smi_info->handlers->event(
2706 smi_info->si_sm, 100);
2707 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2708 smi_result = smi_info->handlers->event(
2709 smi_info->si_sm, 0);
2713 if (smi_result == SI_SM_HOSED)
2715 * We couldn't get the state machine to run, so whatever's at
2716 * the port is probably not an IPMI SMI interface.
2723 static int try_get_dev_id(struct smi_info *smi_info)
2725 unsigned char msg[2];
2726 unsigned char *resp;
2727 unsigned long resp_len;
2730 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2735 * Do a Get Device ID command, since it comes back with some
2738 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2739 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2740 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2742 rv = wait_for_msg_done(smi_info);
2746 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2747 resp, IPMI_MAX_MSG_LENGTH);
2749 /* Check and record info from the get device id, in case we need it. */
2750 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2757 static int try_enable_event_buffer(struct smi_info *smi_info)
2759 unsigned char msg[3];
2760 unsigned char *resp;
2761 unsigned long resp_len;
2764 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2768 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2769 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2770 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2772 rv = wait_for_msg_done(smi_info);
2774 printk(KERN_WARNING PFX "Error getting response from get"
2775 " global enables command, the event buffer is not"
2780 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2781 resp, IPMI_MAX_MSG_LENGTH);
2784 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2785 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2787 printk(KERN_WARNING PFX "Invalid return from get global"
2788 " enables command, cannot enable the event buffer.\n");
2793 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2794 /* buffer is already enabled, nothing to do. */
2797 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2798 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2799 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2800 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2802 rv = wait_for_msg_done(smi_info);
2804 printk(KERN_WARNING PFX "Error getting response from set"
2805 " global, enables command, the event buffer is not"
2810 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2811 resp, IPMI_MAX_MSG_LENGTH);
2814 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2815 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2816 printk(KERN_WARNING PFX "Invalid return from get global,"
2817 "enables command, not enable the event buffer.\n");
2824 * An error when setting the event buffer bit means
2825 * that the event buffer is not supported.
2833 static int smi_type_proc_show(struct seq_file *m, void *v)
2835 struct smi_info *smi = m->private;
2837 return seq_printf(m, "%s\n", si_to_str[smi->si_type]);
2840 static int smi_type_proc_open(struct inode *inode, struct file *file)
2842 return single_open(file, smi_type_proc_show, PDE_DATA(inode));
2845 static const struct file_operations smi_type_proc_ops = {
2846 .open = smi_type_proc_open,
2848 .llseek = seq_lseek,
2849 .release = single_release,
2852 static int smi_si_stats_proc_show(struct seq_file *m, void *v)
2854 struct smi_info *smi = m->private;
2856 seq_printf(m, "interrupts_enabled: %d\n",
2857 smi->irq && !smi->interrupt_disabled);
2858 seq_printf(m, "short_timeouts: %u\n",
2859 smi_get_stat(smi, short_timeouts));
2860 seq_printf(m, "long_timeouts: %u\n",
2861 smi_get_stat(smi, long_timeouts));
2862 seq_printf(m, "idles: %u\n",
2863 smi_get_stat(smi, idles));
2864 seq_printf(m, "interrupts: %u\n",
2865 smi_get_stat(smi, interrupts));
2866 seq_printf(m, "attentions: %u\n",
2867 smi_get_stat(smi, attentions));
2868 seq_printf(m, "flag_fetches: %u\n",
2869 smi_get_stat(smi, flag_fetches));
2870 seq_printf(m, "hosed_count: %u\n",
2871 smi_get_stat(smi, hosed_count));
2872 seq_printf(m, "complete_transactions: %u\n",
2873 smi_get_stat(smi, complete_transactions));
2874 seq_printf(m, "events: %u\n",
2875 smi_get_stat(smi, events));
2876 seq_printf(m, "watchdog_pretimeouts: %u\n",
2877 smi_get_stat(smi, watchdog_pretimeouts));
2878 seq_printf(m, "incoming_messages: %u\n",
2879 smi_get_stat(smi, incoming_messages));
2883 static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
2885 return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
2888 static const struct file_operations smi_si_stats_proc_ops = {
2889 .open = smi_si_stats_proc_open,
2891 .llseek = seq_lseek,
2892 .release = single_release,
2895 static int smi_params_proc_show(struct seq_file *m, void *v)
2897 struct smi_info *smi = m->private;
2899 return seq_printf(m,
2900 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2901 si_to_str[smi->si_type],
2902 addr_space_to_str[smi->io.addr_type],
2911 static int smi_params_proc_open(struct inode *inode, struct file *file)
2913 return single_open(file, smi_params_proc_show, PDE_DATA(inode));
2916 static const struct file_operations smi_params_proc_ops = {
2917 .open = smi_params_proc_open,
2919 .llseek = seq_lseek,
2920 .release = single_release,
2924 * oem_data_avail_to_receive_msg_avail
2925 * @info - smi_info structure with msg_flags set
2927 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2928 * Returns 1 indicating need to re-run handle_flags().
2930 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2932 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2938 * setup_dell_poweredge_oem_data_handler
2939 * @info - smi_info.device_id must be populated
2941 * Systems that match, but have firmware version < 1.40 may assert
2942 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2943 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2944 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2945 * as RECEIVE_MSG_AVAIL instead.
2947 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2948 * assert the OEM[012] bits, and if it did, the driver would have to
2949 * change to handle that properly, we don't actually check for the
2951 * Device ID = 0x20 BMC on PowerEdge 8G servers
2952 * Device Revision = 0x80
2953 * Firmware Revision1 = 0x01 BMC version 1.40
2954 * Firmware Revision2 = 0x40 BCD encoded
2955 * IPMI Version = 0x51 IPMI 1.5
2956 * Manufacturer ID = A2 02 00 Dell IANA
2958 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2959 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2962 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2963 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2964 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2965 #define DELL_IANA_MFR_ID 0x0002a2
2966 static void setup_dell_poweredge_oem_data_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 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2971 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2972 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2973 smi_info->oem_data_avail_handler =
2974 oem_data_avail_to_receive_msg_avail;
2975 } else if (ipmi_version_major(id) < 1 ||
2976 (ipmi_version_major(id) == 1 &&
2977 ipmi_version_minor(id) < 5)) {
2978 smi_info->oem_data_avail_handler =
2979 oem_data_avail_to_receive_msg_avail;
2984 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2985 static void return_hosed_msg_badsize(struct smi_info *smi_info)
2987 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2989 /* Make it a response */
2990 msg->rsp[0] = msg->data[0] | 4;
2991 msg->rsp[1] = msg->data[1];
2992 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2994 smi_info->curr_msg = NULL;
2995 deliver_recv_msg(smi_info, msg);
2999 * dell_poweredge_bt_xaction_handler
3000 * @info - smi_info.device_id must be populated
3002 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3003 * not respond to a Get SDR command if the length of the data
3004 * requested is exactly 0x3A, which leads to command timeouts and no
3005 * data returned. This intercepts such commands, and causes userspace
3006 * callers to try again with a different-sized buffer, which succeeds.
3009 #define STORAGE_NETFN 0x0A
3010 #define STORAGE_CMD_GET_SDR 0x23
3011 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
3012 unsigned long unused,
3015 struct smi_info *smi_info = in;
3016 unsigned char *data = smi_info->curr_msg->data;
3017 unsigned int size = smi_info->curr_msg->data_size;
3019 (data[0]>>2) == STORAGE_NETFN &&
3020 data[1] == STORAGE_CMD_GET_SDR &&
3022 return_hosed_msg_badsize(smi_info);
3028 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
3029 .notifier_call = dell_poweredge_bt_xaction_handler,
3033 * setup_dell_poweredge_bt_xaction_handler
3034 * @info - smi_info.device_id must be filled in already
3036 * Fills in smi_info.device_id.start_transaction_pre_hook
3037 * when we know what function to use there.
3040 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
3042 struct ipmi_device_id *id = &smi_info->device_id;
3043 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
3044 smi_info->si_type == SI_BT)
3045 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
3049 * setup_oem_data_handler
3050 * @info - smi_info.device_id must be filled in already
3052 * Fills in smi_info.device_id.oem_data_available_handler
3053 * when we know what function to use there.
3056 static void setup_oem_data_handler(struct smi_info *smi_info)
3058 setup_dell_poweredge_oem_data_handler(smi_info);
3061 static void setup_xaction_handlers(struct smi_info *smi_info)
3063 setup_dell_poweredge_bt_xaction_handler(smi_info);
3066 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3068 if (smi_info->intf) {
3070 * The timer and thread are only running if the
3071 * interface has been started up and registered.
3073 if (smi_info->thread != NULL)
3074 kthread_stop(smi_info->thread);
3075 del_timer_sync(&smi_info->si_timer);
3079 static struct ipmi_default_vals
3085 { .type = SI_KCS, .port = 0xca2 },
3086 { .type = SI_SMIC, .port = 0xca9 },
3087 { .type = SI_BT, .port = 0xe4 },
3091 static void default_find_bmc(void)
3093 struct smi_info *info;
3096 for (i = 0; ; i++) {
3097 if (!ipmi_defaults[i].port)
3100 if (check_legacy_ioport(ipmi_defaults[i].port))
3103 info = smi_info_alloc();
3107 info->addr_source = SI_DEFAULT;
3109 info->si_type = ipmi_defaults[i].type;
3110 info->io_setup = port_setup;
3111 info->io.addr_data = ipmi_defaults[i].port;
3112 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3114 info->io.addr = NULL;
3115 info->io.regspacing = DEFAULT_REGSPACING;
3116 info->io.regsize = DEFAULT_REGSPACING;
3117 info->io.regshift = 0;
3119 if (add_smi(info) == 0) {
3120 if ((try_smi_init(info)) == 0) {
3122 printk(KERN_INFO PFX "Found default %s"
3123 " state machine at %s address 0x%lx\n",
3124 si_to_str[info->si_type],
3125 addr_space_to_str[info->io.addr_type],
3126 info->io.addr_data);
3128 cleanup_one_si(info);
3135 static int is_new_interface(struct smi_info *info)
3139 list_for_each_entry(e, &smi_infos, link) {
3140 if (e->io.addr_type != info->io.addr_type)
3142 if (e->io.addr_data == info->io.addr_data)
3149 static int add_smi(struct smi_info *new_smi)
3153 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3154 ipmi_addr_src_to_str[new_smi->addr_source],
3155 si_to_str[new_smi->si_type]);
3156 mutex_lock(&smi_infos_lock);
3157 if (!is_new_interface(new_smi)) {
3158 printk(KERN_CONT " duplicate interface\n");
3163 printk(KERN_CONT "\n");
3165 /* So we know not to free it unless we have allocated one. */
3166 new_smi->intf = NULL;
3167 new_smi->si_sm = NULL;
3168 new_smi->handlers = NULL;
3170 list_add_tail(&new_smi->link, &smi_infos);
3173 mutex_unlock(&smi_infos_lock);
3177 static int try_smi_init(struct smi_info *new_smi)
3182 printk(KERN_INFO PFX "Trying %s-specified %s state"
3183 " machine at %s address 0x%lx, slave address 0x%x,"
3185 ipmi_addr_src_to_str[new_smi->addr_source],
3186 si_to_str[new_smi->si_type],
3187 addr_space_to_str[new_smi->io.addr_type],
3188 new_smi->io.addr_data,
3189 new_smi->slave_addr, new_smi->irq);
3191 switch (new_smi->si_type) {
3193 new_smi->handlers = &kcs_smi_handlers;
3197 new_smi->handlers = &smic_smi_handlers;
3201 new_smi->handlers = &bt_smi_handlers;
3205 /* No support for anything else yet. */
3210 /* Allocate the state machine's data and initialize it. */
3211 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3212 if (!new_smi->si_sm) {
3214 "Could not allocate state machine memory\n");
3218 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3221 /* Now that we know the I/O size, we can set up the I/O. */
3222 rv = new_smi->io_setup(new_smi);
3224 printk(KERN_ERR PFX "Could not set up I/O space\n");
3228 /* Do low-level detection first. */
3229 if (new_smi->handlers->detect(new_smi->si_sm)) {
3230 if (new_smi->addr_source)
3231 printk(KERN_INFO PFX "Interface detection failed\n");
3237 * Attempt a get device id command. If it fails, we probably
3238 * don't have a BMC here.
3240 rv = try_get_dev_id(new_smi);
3242 if (new_smi->addr_source)
3243 printk(KERN_INFO PFX "There appears to be no BMC"
3244 " at this location\n");
3248 setup_oem_data_handler(new_smi);
3249 setup_xaction_handlers(new_smi);
3251 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3252 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3253 new_smi->curr_msg = NULL;
3254 atomic_set(&new_smi->req_events, 0);
3255 new_smi->run_to_completion = 0;
3256 for (i = 0; i < SI_NUM_STATS; i++)
3257 atomic_set(&new_smi->stats[i], 0);
3259 new_smi->interrupt_disabled = 1;
3260 atomic_set(&new_smi->stop_operation, 0);
3261 new_smi->intf_num = smi_num;
3264 rv = try_enable_event_buffer(new_smi);
3266 new_smi->has_event_buffer = 1;
3269 * Start clearing the flags before we enable interrupts or the
3270 * timer to avoid racing with the timer.
3272 start_clear_flags(new_smi);
3273 /* IRQ is defined to be set when non-zero. */
3275 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3277 if (!new_smi->dev) {
3279 * If we don't already have a device from something
3280 * else (like PCI), then register a new one.
3282 new_smi->pdev = platform_device_alloc("ipmi_si",
3284 if (!new_smi->pdev) {
3286 "Unable to allocate platform device\n");
3289 new_smi->dev = &new_smi->pdev->dev;
3290 new_smi->dev->driver = &ipmi_driver.driver;
3292 rv = platform_device_add(new_smi->pdev);
3295 "Unable to register system interface device:"
3300 new_smi->dev_registered = 1;
3303 rv = ipmi_register_smi(&handlers,
3305 &new_smi->device_id,
3308 new_smi->slave_addr);
3310 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3312 goto out_err_stop_timer;
3315 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3319 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3320 goto out_err_stop_timer;
3323 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3324 &smi_si_stats_proc_ops,
3327 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3328 goto out_err_stop_timer;
3331 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3332 &smi_params_proc_ops,
3335 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3336 goto out_err_stop_timer;
3339 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3340 si_to_str[new_smi->si_type]);
3345 atomic_inc(&new_smi->stop_operation);
3346 wait_for_timer_and_thread(new_smi);
3349 new_smi->interrupt_disabled = 1;
3351 if (new_smi->intf) {
3352 ipmi_unregister_smi(new_smi->intf);
3353 new_smi->intf = NULL;
3356 if (new_smi->irq_cleanup) {
3357 new_smi->irq_cleanup(new_smi);
3358 new_smi->irq_cleanup = NULL;
3362 * Wait until we know that we are out of any interrupt
3363 * handlers might have been running before we freed the
3366 synchronize_sched();
3368 if (new_smi->si_sm) {
3369 if (new_smi->handlers)
3370 new_smi->handlers->cleanup(new_smi->si_sm);
3371 kfree(new_smi->si_sm);
3372 new_smi->si_sm = NULL;
3374 if (new_smi->addr_source_cleanup) {
3375 new_smi->addr_source_cleanup(new_smi);
3376 new_smi->addr_source_cleanup = NULL;
3378 if (new_smi->io_cleanup) {
3379 new_smi->io_cleanup(new_smi);
3380 new_smi->io_cleanup = NULL;
3383 if (new_smi->dev_registered) {
3384 platform_device_unregister(new_smi->pdev);
3385 new_smi->dev_registered = 0;
3391 static int init_ipmi_si(void)
3397 enum ipmi_addr_src type = SI_INVALID;
3403 if (si_tryplatform) {
3404 rv = platform_driver_register(&ipmi_driver);
3406 printk(KERN_ERR PFX "Unable to register "
3407 "driver: %d\n", rv);
3412 /* Parse out the si_type string into its components. */
3415 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3417 str = strchr(str, ',');
3427 printk(KERN_INFO "IPMI System Interface driver.\n");
3429 /* If the user gave us a device, they presumably want us to use it */
3430 if (!hardcode_find_bmc())
3435 rv = pci_register_driver(&ipmi_pci_driver);
3437 printk(KERN_ERR PFX "Unable to register "
3438 "PCI driver: %d\n", rv);
3446 pnp_register_driver(&ipmi_pnp_driver);
3461 /* We prefer devices with interrupts, but in the case of a machine
3462 with multiple BMCs we assume that there will be several instances
3463 of a given type so if we succeed in registering a type then also
3464 try to register everything else of the same type */
3466 mutex_lock(&smi_infos_lock);
3467 list_for_each_entry(e, &smi_infos, link) {
3468 /* Try to register a device if it has an IRQ and we either
3469 haven't successfully registered a device yet or this
3470 device has the same type as one we successfully registered */
3471 if (e->irq && (!type || e->addr_source == type)) {
3472 if (!try_smi_init(e)) {
3473 type = e->addr_source;
3478 /* type will only have been set if we successfully registered an si */
3480 mutex_unlock(&smi_infos_lock);
3484 /* Fall back to the preferred device */
3486 list_for_each_entry(e, &smi_infos, link) {
3487 if (!e->irq && (!type || e->addr_source == type)) {
3488 if (!try_smi_init(e)) {
3489 type = e->addr_source;
3493 mutex_unlock(&smi_infos_lock);
3498 if (si_trydefaults) {
3499 mutex_lock(&smi_infos_lock);
3500 if (list_empty(&smi_infos)) {
3501 /* No BMC was found, try defaults. */
3502 mutex_unlock(&smi_infos_lock);
3505 mutex_unlock(&smi_infos_lock);
3508 mutex_lock(&smi_infos_lock);
3509 if (unload_when_empty && list_empty(&smi_infos)) {
3510 mutex_unlock(&smi_infos_lock);
3512 printk(KERN_WARNING PFX
3513 "Unable to find any System Interface(s)\n");
3516 mutex_unlock(&smi_infos_lock);
3520 module_init(init_ipmi_si);
3522 static void cleanup_one_si(struct smi_info *to_clean)
3525 unsigned long flags;
3530 list_del(&to_clean->link);
3532 /* Tell the driver that we are shutting down. */
3533 atomic_inc(&to_clean->stop_operation);
3536 * Make sure the timer and thread are stopped and will not run
3539 wait_for_timer_and_thread(to_clean);
3542 * Timeouts are stopped, now make sure the interrupts are off
3543 * for the device. A little tricky with locks to make sure
3544 * there are no races.
3546 spin_lock_irqsave(&to_clean->si_lock, flags);
3547 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3548 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3550 schedule_timeout_uninterruptible(1);
3551 spin_lock_irqsave(&to_clean->si_lock, flags);
3553 disable_si_irq(to_clean);
3554 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3555 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3557 schedule_timeout_uninterruptible(1);
3560 /* Clean up interrupts and make sure that everything is done. */
3561 if (to_clean->irq_cleanup)
3562 to_clean->irq_cleanup(to_clean);
3563 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3565 schedule_timeout_uninterruptible(1);
3569 rv = ipmi_unregister_smi(to_clean->intf);
3572 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3576 if (to_clean->handlers)
3577 to_clean->handlers->cleanup(to_clean->si_sm);
3579 kfree(to_clean->si_sm);
3581 if (to_clean->addr_source_cleanup)
3582 to_clean->addr_source_cleanup(to_clean);
3583 if (to_clean->io_cleanup)
3584 to_clean->io_cleanup(to_clean);
3586 if (to_clean->dev_registered)
3587 platform_device_unregister(to_clean->pdev);
3592 static void cleanup_ipmi_si(void)
3594 struct smi_info *e, *tmp_e;
3601 pci_unregister_driver(&ipmi_pci_driver);
3605 pnp_unregister_driver(&ipmi_pnp_driver);
3608 platform_driver_unregister(&ipmi_driver);
3610 mutex_lock(&smi_infos_lock);
3611 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3613 mutex_unlock(&smi_infos_lock);
3615 module_exit(cleanup_ipmi_si);
3617 MODULE_LICENSE("GPL");
3618 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3619 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3620 " system interfaces.");