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 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
250 /* The time (in jiffies) the last timeout occurred at. */
251 unsigned long last_timeout_jiffies;
253 /* Used to gracefully stop the timer without race conditions. */
254 atomic_t stop_operation;
257 * The driver will disable interrupts when it gets into a
258 * situation where it cannot handle messages due to lack of
259 * memory. Once that situation clears up, it will re-enable
262 int interrupt_disabled;
264 /* From the get device id response... */
265 struct ipmi_device_id device_id;
267 /* Driver model stuff. */
269 struct platform_device *pdev;
272 * True if we allocated the device, false if it came from
273 * someplace else (like PCI).
277 /* Slave address, could be reported from DMI. */
278 unsigned char slave_addr;
280 /* Counters and things for the proc filesystem. */
281 atomic_t stats[SI_NUM_STATS];
283 struct task_struct *thread;
285 struct list_head link;
286 union ipmi_smi_info_union addr_info;
289 #define smi_inc_stat(smi, stat) \
290 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
291 #define smi_get_stat(smi, stat) \
292 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
294 #define SI_MAX_PARMS 4
296 static int force_kipmid[SI_MAX_PARMS];
297 static int num_force_kipmid;
299 static int pci_registered;
302 static int pnp_registered;
305 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
306 static int num_max_busy_us;
308 static int unload_when_empty = 1;
310 static int add_smi(struct smi_info *smi);
311 static int try_smi_init(struct smi_info *smi);
312 static void cleanup_one_si(struct smi_info *to_clean);
313 static void cleanup_ipmi_si(void);
315 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
316 static int register_xaction_notifier(struct notifier_block *nb)
318 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
321 static void deliver_recv_msg(struct smi_info *smi_info,
322 struct ipmi_smi_msg *msg)
324 /* Deliver the message to the upper layer. */
325 ipmi_smi_msg_received(smi_info->intf, msg);
328 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
330 struct ipmi_smi_msg *msg = smi_info->curr_msg;
332 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
333 cCode = IPMI_ERR_UNSPECIFIED;
334 /* else use it as is */
336 /* Make it a response */
337 msg->rsp[0] = msg->data[0] | 4;
338 msg->rsp[1] = msg->data[1];
342 smi_info->curr_msg = NULL;
343 deliver_recv_msg(smi_info, msg);
346 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
349 struct list_head *entry = NULL;
354 /* Pick the high priority queue first. */
355 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
356 entry = smi_info->hp_xmit_msgs.next;
357 } else if (!list_empty(&(smi_info->xmit_msgs))) {
358 entry = smi_info->xmit_msgs.next;
362 smi_info->curr_msg = NULL;
368 smi_info->curr_msg = list_entry(entry,
373 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
375 err = atomic_notifier_call_chain(&xaction_notifier_list,
377 if (err & NOTIFY_STOP_MASK) {
378 rv = SI_SM_CALL_WITHOUT_DELAY;
381 err = smi_info->handlers->start_transaction(
383 smi_info->curr_msg->data,
384 smi_info->curr_msg->data_size);
386 return_hosed_msg(smi_info, err);
388 rv = SI_SM_CALL_WITHOUT_DELAY;
394 static void start_enable_irq(struct smi_info *smi_info)
396 unsigned char msg[2];
399 * If we are enabling interrupts, we have to tell the
402 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
403 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
405 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
406 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
409 static void start_disable_irq(struct smi_info *smi_info)
411 unsigned char msg[2];
413 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
414 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
416 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
417 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
420 static void start_clear_flags(struct smi_info *smi_info)
422 unsigned char msg[3];
424 /* Make sure the watchdog pre-timeout flag is not set at startup. */
425 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
426 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
427 msg[2] = WDT_PRE_TIMEOUT_INT;
429 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
430 smi_info->si_state = SI_CLEARING_FLAGS;
433 static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
435 smi_info->last_timeout_jiffies = jiffies;
436 mod_timer(&smi_info->si_timer, new_val);
437 smi_info->timer_running = true;
441 * When we have a situtaion where we run out of memory and cannot
442 * allocate messages, we just leave them in the BMC and run the system
443 * polled until we can allocate some memory. Once we have some
444 * memory, we will re-enable the interrupt.
446 static inline void disable_si_irq(struct smi_info *smi_info)
448 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
449 start_disable_irq(smi_info);
450 smi_info->interrupt_disabled = 1;
451 if (!atomic_read(&smi_info->stop_operation))
452 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
456 static inline void enable_si_irq(struct smi_info *smi_info)
458 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
459 start_enable_irq(smi_info);
460 smi_info->interrupt_disabled = 0;
464 static void handle_flags(struct smi_info *smi_info)
467 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
468 /* Watchdog pre-timeout */
469 smi_inc_stat(smi_info, watchdog_pretimeouts);
471 start_clear_flags(smi_info);
472 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
473 ipmi_smi_watchdog_pretimeout(smi_info->intf);
474 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
475 /* Messages available. */
476 smi_info->curr_msg = ipmi_alloc_smi_msg();
477 if (!smi_info->curr_msg) {
478 disable_si_irq(smi_info);
479 smi_info->si_state = SI_NORMAL;
482 enable_si_irq(smi_info);
484 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
485 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
486 smi_info->curr_msg->data_size = 2;
488 smi_info->handlers->start_transaction(
490 smi_info->curr_msg->data,
491 smi_info->curr_msg->data_size);
492 smi_info->si_state = SI_GETTING_MESSAGES;
493 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
494 /* Events available. */
495 smi_info->curr_msg = ipmi_alloc_smi_msg();
496 if (!smi_info->curr_msg) {
497 disable_si_irq(smi_info);
498 smi_info->si_state = SI_NORMAL;
501 enable_si_irq(smi_info);
503 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
504 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
505 smi_info->curr_msg->data_size = 2;
507 smi_info->handlers->start_transaction(
509 smi_info->curr_msg->data,
510 smi_info->curr_msg->data_size);
511 smi_info->si_state = SI_GETTING_EVENTS;
512 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
513 smi_info->oem_data_avail_handler) {
514 if (smi_info->oem_data_avail_handler(smi_info))
517 smi_info->si_state = SI_NORMAL;
520 static void handle_transaction_done(struct smi_info *smi_info)
522 struct ipmi_smi_msg *msg;
527 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
529 switch (smi_info->si_state) {
531 if (!smi_info->curr_msg)
534 smi_info->curr_msg->rsp_size
535 = smi_info->handlers->get_result(
537 smi_info->curr_msg->rsp,
538 IPMI_MAX_MSG_LENGTH);
541 * Do this here becase deliver_recv_msg() releases the
542 * lock, and a new message can be put in during the
543 * time the lock is released.
545 msg = smi_info->curr_msg;
546 smi_info->curr_msg = NULL;
547 deliver_recv_msg(smi_info, msg);
550 case SI_GETTING_FLAGS:
552 unsigned char msg[4];
555 /* We got the flags from the SMI, now handle them. */
556 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
558 /* Error fetching flags, just give up for now. */
559 smi_info->si_state = SI_NORMAL;
560 } else if (len < 4) {
562 * Hmm, no flags. That's technically illegal, but
563 * don't use uninitialized data.
565 smi_info->si_state = SI_NORMAL;
567 smi_info->msg_flags = msg[3];
568 handle_flags(smi_info);
573 case SI_CLEARING_FLAGS:
574 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
576 unsigned char msg[3];
578 /* We cleared the flags. */
579 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
581 /* Error clearing flags */
582 dev_warn(smi_info->dev,
583 "Error clearing flags: %2.2x\n", msg[2]);
585 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
586 start_enable_irq(smi_info);
588 smi_info->si_state = SI_NORMAL;
592 case SI_GETTING_EVENTS:
594 smi_info->curr_msg->rsp_size
595 = smi_info->handlers->get_result(
597 smi_info->curr_msg->rsp,
598 IPMI_MAX_MSG_LENGTH);
601 * Do this here becase deliver_recv_msg() releases the
602 * lock, and a new message can be put in during the
603 * time the lock is released.
605 msg = smi_info->curr_msg;
606 smi_info->curr_msg = NULL;
607 if (msg->rsp[2] != 0) {
608 /* Error getting event, probably done. */
611 /* Take off the event flag. */
612 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
613 handle_flags(smi_info);
615 smi_inc_stat(smi_info, events);
618 * Do this before we deliver the message
619 * because delivering the message releases the
620 * lock and something else can mess with the
623 handle_flags(smi_info);
625 deliver_recv_msg(smi_info, msg);
630 case SI_GETTING_MESSAGES:
632 smi_info->curr_msg->rsp_size
633 = smi_info->handlers->get_result(
635 smi_info->curr_msg->rsp,
636 IPMI_MAX_MSG_LENGTH);
639 * Do this here becase deliver_recv_msg() releases the
640 * lock, and a new message can be put in during the
641 * time the lock is released.
643 msg = smi_info->curr_msg;
644 smi_info->curr_msg = NULL;
645 if (msg->rsp[2] != 0) {
646 /* Error getting event, probably done. */
649 /* Take off the msg flag. */
650 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
651 handle_flags(smi_info);
653 smi_inc_stat(smi_info, incoming_messages);
656 * Do this before we deliver the message
657 * because delivering the message releases the
658 * lock and something else can mess with the
661 handle_flags(smi_info);
663 deliver_recv_msg(smi_info, msg);
668 case SI_ENABLE_INTERRUPTS1:
670 unsigned char msg[4];
672 /* We got the flags from the SMI, now handle them. */
673 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
675 dev_warn(smi_info->dev,
676 "Couldn't get irq info: %x.\n", msg[2]);
677 dev_warn(smi_info->dev,
678 "Maybe ok, but ipmi might run very slowly.\n");
679 smi_info->si_state = SI_NORMAL;
681 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
682 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
684 IPMI_BMC_RCV_MSG_INTR |
685 IPMI_BMC_EVT_MSG_INTR);
686 smi_info->handlers->start_transaction(
687 smi_info->si_sm, msg, 3);
688 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
693 case SI_ENABLE_INTERRUPTS2:
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,
701 "Couldn't set irq info: %x.\n", msg[2]);
702 dev_warn(smi_info->dev,
703 "Maybe ok, but ipmi might run very slowly.\n");
705 smi_info->interrupt_disabled = 0;
706 smi_info->si_state = SI_NORMAL;
710 case SI_DISABLE_INTERRUPTS1:
712 unsigned char msg[4];
714 /* We got the flags from the SMI, now handle them. */
715 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
717 dev_warn(smi_info->dev, "Could not disable interrupts"
719 smi_info->si_state = SI_NORMAL;
721 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
722 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
724 ~(IPMI_BMC_RCV_MSG_INTR |
725 IPMI_BMC_EVT_MSG_INTR));
726 smi_info->handlers->start_transaction(
727 smi_info->si_sm, msg, 3);
728 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
733 case SI_DISABLE_INTERRUPTS2:
735 unsigned char msg[4];
737 /* We got the flags from the SMI, now handle them. */
738 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
740 dev_warn(smi_info->dev, "Could not disable interrupts"
743 smi_info->si_state = SI_NORMAL;
750 * Called on timeouts and events. Timeouts should pass the elapsed
751 * time, interrupts should pass in zero. Must be called with
752 * si_lock held and interrupts disabled.
754 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
757 enum si_sm_result si_sm_result;
761 * There used to be a loop here that waited a little while
762 * (around 25us) before giving up. That turned out to be
763 * pointless, the minimum delays I was seeing were in the 300us
764 * range, which is far too long to wait in an interrupt. So
765 * we just run until the state machine tells us something
766 * happened or it needs a delay.
768 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
770 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
771 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
773 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
774 smi_inc_stat(smi_info, complete_transactions);
776 handle_transaction_done(smi_info);
777 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
778 } else if (si_sm_result == SI_SM_HOSED) {
779 smi_inc_stat(smi_info, hosed_count);
782 * Do the before return_hosed_msg, because that
785 smi_info->si_state = SI_NORMAL;
786 if (smi_info->curr_msg != NULL) {
788 * If we were handling a user message, format
789 * a response to send to the upper layer to
790 * tell it about the error.
792 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
794 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
798 * We prefer handling attn over new messages. But don't do
799 * this if there is not yet an upper layer to handle anything.
801 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
802 unsigned char msg[2];
804 smi_inc_stat(smi_info, attentions);
807 * Got a attn, send down a get message flags to see
808 * what's causing it. It would be better to handle
809 * this in the upper layer, but due to the way
810 * interrupts work with the SMI, that's not really
813 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
814 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
816 smi_info->handlers->start_transaction(
817 smi_info->si_sm, msg, 2);
818 smi_info->si_state = SI_GETTING_FLAGS;
822 /* If we are currently idle, try to start the next message. */
823 if (si_sm_result == SI_SM_IDLE) {
824 smi_inc_stat(smi_info, idles);
826 si_sm_result = start_next_msg(smi_info);
827 if (si_sm_result != SI_SM_IDLE)
831 if ((si_sm_result == SI_SM_IDLE)
832 && (atomic_read(&smi_info->req_events))) {
834 * We are idle and the upper layer requested that I fetch
837 atomic_set(&smi_info->req_events, 0);
839 smi_info->curr_msg = ipmi_alloc_smi_msg();
840 if (!smi_info->curr_msg)
843 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
844 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
845 smi_info->curr_msg->data_size = 2;
847 smi_info->handlers->start_transaction(
849 smi_info->curr_msg->data,
850 smi_info->curr_msg->data_size);
851 smi_info->si_state = SI_GETTING_EVENTS;
858 static void sender(void *send_info,
859 struct ipmi_smi_msg *msg,
862 struct smi_info *smi_info = send_info;
863 enum si_sm_result result;
869 if (atomic_read(&smi_info->stop_operation)) {
870 msg->rsp[0] = msg->data[0] | 4;
871 msg->rsp[1] = msg->data[1];
872 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
874 deliver_recv_msg(smi_info, msg);
880 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
883 if (smi_info->run_to_completion) {
885 * If we are running to completion, then throw it in
886 * the list and run transactions until everything is
887 * clear. Priority doesn't matter here.
891 * Run to completion means we are single-threaded, no
894 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
896 result = smi_event_handler(smi_info, 0);
897 while (result != SI_SM_IDLE) {
898 udelay(SI_SHORT_TIMEOUT_USEC);
899 result = smi_event_handler(smi_info,
900 SI_SHORT_TIMEOUT_USEC);
905 spin_lock_irqsave(&smi_info->si_lock, flags);
907 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
909 list_add_tail(&msg->link, &smi_info->xmit_msgs);
911 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
912 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
914 if (smi_info->thread)
915 wake_up_process(smi_info->thread);
917 start_next_msg(smi_info);
918 smi_event_handler(smi_info, 0);
920 spin_unlock_irqrestore(&smi_info->si_lock, flags);
923 static void set_run_to_completion(void *send_info, int i_run_to_completion)
925 struct smi_info *smi_info = send_info;
926 enum si_sm_result result;
928 smi_info->run_to_completion = i_run_to_completion;
929 if (i_run_to_completion) {
930 result = smi_event_handler(smi_info, 0);
931 while (result != SI_SM_IDLE) {
932 udelay(SI_SHORT_TIMEOUT_USEC);
933 result = smi_event_handler(smi_info,
934 SI_SHORT_TIMEOUT_USEC);
940 * Use -1 in the nsec value of the busy waiting timespec to tell that
941 * we are spinning in kipmid looking for something and not delaying
944 static inline void ipmi_si_set_not_busy(struct timespec *ts)
948 static inline int ipmi_si_is_busy(struct timespec *ts)
950 return ts->tv_nsec != -1;
953 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
954 const struct smi_info *smi_info,
955 struct timespec *busy_until)
957 unsigned int max_busy_us = 0;
959 if (smi_info->intf_num < num_max_busy_us)
960 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
961 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
962 ipmi_si_set_not_busy(busy_until);
963 else if (!ipmi_si_is_busy(busy_until)) {
964 getnstimeofday(busy_until);
965 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
968 getnstimeofday(&now);
969 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
970 ipmi_si_set_not_busy(busy_until);
979 * A busy-waiting loop for speeding up IPMI operation.
981 * Lousy hardware makes this hard. This is only enabled for systems
982 * that are not BT and do not have interrupts. It starts spinning
983 * when an operation is complete or until max_busy tells it to stop
984 * (if that is enabled). See the paragraph on kimid_max_busy_us in
985 * Documentation/IPMI.txt for details.
987 static int ipmi_thread(void *data)
989 struct smi_info *smi_info = data;
991 enum si_sm_result smi_result;
992 struct timespec busy_until;
994 ipmi_si_set_not_busy(&busy_until);
995 set_user_nice(current, 19);
996 while (!kthread_should_stop()) {
999 spin_lock_irqsave(&(smi_info->si_lock), flags);
1000 smi_result = smi_event_handler(smi_info, 0);
1003 * If the driver is doing something, there is a possible
1004 * race with the timer. If the timer handler see idle,
1005 * and the thread here sees something else, the timer
1006 * handler won't restart the timer even though it is
1007 * required. So start it here if necessary.
1009 if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
1010 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
1012 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1013 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1015 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1017 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1019 else if (smi_result == SI_SM_IDLE)
1020 schedule_timeout_interruptible(100);
1022 schedule_timeout_interruptible(1);
1028 static void poll(void *send_info)
1030 struct smi_info *smi_info = send_info;
1031 unsigned long flags = 0;
1032 int run_to_completion = smi_info->run_to_completion;
1035 * Make sure there is some delay in the poll loop so we can
1036 * drive time forward and timeout things.
1039 if (!run_to_completion)
1040 spin_lock_irqsave(&smi_info->si_lock, flags);
1041 smi_event_handler(smi_info, 10);
1042 if (!run_to_completion)
1043 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1046 static void request_events(void *send_info)
1048 struct smi_info *smi_info = send_info;
1050 if (atomic_read(&smi_info->stop_operation) ||
1051 !smi_info->has_event_buffer)
1054 atomic_set(&smi_info->req_events, 1);
1057 static int initialized;
1059 static void smi_timeout(unsigned long data)
1061 struct smi_info *smi_info = (struct smi_info *) data;
1062 enum si_sm_result smi_result;
1063 unsigned long flags;
1064 unsigned long jiffies_now;
1071 spin_lock_irqsave(&(smi_info->si_lock), flags);
1073 do_gettimeofday(&t);
1074 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1076 jiffies_now = jiffies;
1077 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1078 * SI_USEC_PER_JIFFY);
1079 smi_result = smi_event_handler(smi_info, time_diff);
1081 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1082 /* Running with interrupts, only do long timeouts. */
1083 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1084 smi_inc_stat(smi_info, long_timeouts);
1089 * If the state machine asks for a short delay, then shorten
1090 * the timer timeout.
1092 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1093 smi_inc_stat(smi_info, short_timeouts);
1094 timeout = jiffies + 1;
1096 smi_inc_stat(smi_info, long_timeouts);
1097 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1101 if (smi_result != SI_SM_IDLE)
1102 smi_mod_timer(smi_info, timeout);
1104 smi_info->timer_running = false;
1105 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1108 static irqreturn_t si_irq_handler(int irq, void *data)
1110 struct smi_info *smi_info = data;
1111 unsigned long flags;
1116 spin_lock_irqsave(&(smi_info->si_lock), flags);
1118 smi_inc_stat(smi_info, interrupts);
1121 do_gettimeofday(&t);
1122 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1124 smi_event_handler(smi_info, 0);
1125 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1129 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1131 struct smi_info *smi_info = data;
1132 /* We need to clear the IRQ flag for the BT interface. */
1133 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1134 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1135 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1136 return si_irq_handler(irq, data);
1139 static int smi_start_processing(void *send_info,
1142 struct smi_info *new_smi = send_info;
1145 new_smi->intf = intf;
1147 /* Try to claim any interrupts. */
1148 if (new_smi->irq_setup)
1149 new_smi->irq_setup(new_smi);
1151 /* Set up the timer that drives the interface. */
1152 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1153 smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
1156 * Check if the user forcefully enabled the daemon.
1158 if (new_smi->intf_num < num_force_kipmid)
1159 enable = force_kipmid[new_smi->intf_num];
1161 * The BT interface is efficient enough to not need a thread,
1162 * and there is no need for a thread if we have interrupts.
1164 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1168 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1169 "kipmi%d", new_smi->intf_num);
1170 if (IS_ERR(new_smi->thread)) {
1171 dev_notice(new_smi->dev, "Could not start"
1172 " kernel thread due to error %ld, only using"
1173 " timers to drive the interface\n",
1174 PTR_ERR(new_smi->thread));
1175 new_smi->thread = NULL;
1182 static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1184 struct smi_info *smi = send_info;
1186 data->addr_src = smi->addr_source;
1187 data->dev = smi->dev;
1188 data->addr_info = smi->addr_info;
1189 get_device(smi->dev);
1194 static void set_maintenance_mode(void *send_info, int enable)
1196 struct smi_info *smi_info = send_info;
1199 atomic_set(&smi_info->req_events, 0);
1202 static struct ipmi_smi_handlers handlers = {
1203 .owner = THIS_MODULE,
1204 .start_processing = smi_start_processing,
1205 .get_smi_info = get_smi_info,
1207 .request_events = request_events,
1208 .set_maintenance_mode = set_maintenance_mode,
1209 .set_run_to_completion = set_run_to_completion,
1214 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1215 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1218 static LIST_HEAD(smi_infos);
1219 static DEFINE_MUTEX(smi_infos_lock);
1220 static int smi_num; /* Used to sequence the SMIs */
1222 #define DEFAULT_REGSPACING 1
1223 #define DEFAULT_REGSIZE 1
1226 static bool si_tryacpi = 1;
1229 static bool si_trydmi = 1;
1231 static bool si_tryplatform = 1;
1233 static bool si_trypci = 1;
1235 static bool si_trydefaults = 1;
1236 static char *si_type[SI_MAX_PARMS];
1237 #define MAX_SI_TYPE_STR 30
1238 static char si_type_str[MAX_SI_TYPE_STR];
1239 static unsigned long addrs[SI_MAX_PARMS];
1240 static unsigned int num_addrs;
1241 static unsigned int ports[SI_MAX_PARMS];
1242 static unsigned int num_ports;
1243 static int irqs[SI_MAX_PARMS];
1244 static unsigned int num_irqs;
1245 static int regspacings[SI_MAX_PARMS];
1246 static unsigned int num_regspacings;
1247 static int regsizes[SI_MAX_PARMS];
1248 static unsigned int num_regsizes;
1249 static int regshifts[SI_MAX_PARMS];
1250 static unsigned int num_regshifts;
1251 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1252 static unsigned int num_slave_addrs;
1254 #define IPMI_IO_ADDR_SPACE 0
1255 #define IPMI_MEM_ADDR_SPACE 1
1256 static char *addr_space_to_str[] = { "i/o", "mem" };
1258 static int hotmod_handler(const char *val, struct kernel_param *kp);
1260 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1261 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1262 " Documentation/IPMI.txt in the kernel sources for the"
1266 module_param_named(tryacpi, si_tryacpi, bool, 0);
1267 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1268 " default scan of the interfaces identified via ACPI");
1271 module_param_named(trydmi, si_trydmi, bool, 0);
1272 MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
1273 " default scan of the interfaces identified via DMI");
1275 module_param_named(tryplatform, si_tryplatform, bool, 0);
1276 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1277 " default scan of the interfaces identified via platform"
1278 " interfaces like openfirmware");
1280 module_param_named(trypci, si_trypci, bool, 0);
1281 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1282 " default scan of the interfaces identified via pci");
1284 module_param_named(trydefaults, si_trydefaults, bool, 0);
1285 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1286 " default scan of the KCS and SMIC interface at the standard"
1288 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1289 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1290 " interface separated by commas. The types are 'kcs',"
1291 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1292 " the first interface to kcs and the second to bt");
1293 module_param_array(addrs, ulong, &num_addrs, 0);
1294 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1295 " addresses separated by commas. Only use if an interface"
1296 " is in memory. Otherwise, set it to zero or leave"
1298 module_param_array(ports, uint, &num_ports, 0);
1299 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1300 " addresses separated by commas. Only use if an interface"
1301 " is a port. Otherwise, set it to zero or leave"
1303 module_param_array(irqs, int, &num_irqs, 0);
1304 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1305 " addresses separated by commas. Only use if an interface"
1306 " has an interrupt. Otherwise, set it to zero or leave"
1308 module_param_array(regspacings, int, &num_regspacings, 0);
1309 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1310 " and each successive register used by the interface. For"
1311 " instance, if the start address is 0xca2 and the spacing"
1312 " is 2, then the second address is at 0xca4. Defaults"
1314 module_param_array(regsizes, int, &num_regsizes, 0);
1315 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1316 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1317 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1318 " the 8-bit IPMI register has to be read from a larger"
1320 module_param_array(regshifts, int, &num_regshifts, 0);
1321 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1322 " IPMI register, in bits. For instance, if the data"
1323 " is read from a 32-bit word and the IPMI data is in"
1324 " bit 8-15, then the shift would be 8");
1325 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1326 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1327 " the controller. Normally this is 0x20, but can be"
1328 " overridden by this parm. This is an array indexed"
1329 " by interface number.");
1330 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1331 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1332 " disabled(0). Normally the IPMI driver auto-detects"
1333 " this, but the value may be overridden by this parm.");
1334 module_param(unload_when_empty, int, 0);
1335 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1336 " specified or found, default is 1. Setting to 0"
1337 " is useful for hot add of devices using hotmod.");
1338 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1339 MODULE_PARM_DESC(kipmid_max_busy_us,
1340 "Max time (in microseconds) to busy-wait for IPMI data before"
1341 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1342 " if kipmid is using up a lot of CPU time.");
1345 static void std_irq_cleanup(struct smi_info *info)
1347 if (info->si_type == SI_BT)
1348 /* Disable the interrupt in the BT interface. */
1349 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1350 free_irq(info->irq, info);
1353 static int std_irq_setup(struct smi_info *info)
1360 if (info->si_type == SI_BT) {
1361 rv = request_irq(info->irq,
1363 IRQF_SHARED | IRQF_DISABLED,
1367 /* Enable the interrupt in the BT interface. */
1368 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1369 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1371 rv = request_irq(info->irq,
1373 IRQF_SHARED | IRQF_DISABLED,
1377 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1378 " running polled\n",
1379 DEVICE_NAME, info->irq);
1382 info->irq_cleanup = std_irq_cleanup;
1383 dev_info(info->dev, "Using irq %d\n", info->irq);
1389 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1391 unsigned int addr = io->addr_data;
1393 return inb(addr + (offset * io->regspacing));
1396 static void port_outb(struct si_sm_io *io, unsigned int offset,
1399 unsigned int addr = io->addr_data;
1401 outb(b, addr + (offset * io->regspacing));
1404 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1406 unsigned int addr = io->addr_data;
1408 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1411 static void port_outw(struct si_sm_io *io, unsigned int offset,
1414 unsigned int addr = io->addr_data;
1416 outw(b << io->regshift, addr + (offset * io->regspacing));
1419 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1421 unsigned int addr = io->addr_data;
1423 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1426 static void port_outl(struct si_sm_io *io, unsigned int offset,
1429 unsigned int addr = io->addr_data;
1431 outl(b << io->regshift, addr+(offset * io->regspacing));
1434 static void port_cleanup(struct smi_info *info)
1436 unsigned int addr = info->io.addr_data;
1440 for (idx = 0; idx < info->io_size; idx++)
1441 release_region(addr + idx * info->io.regspacing,
1446 static int port_setup(struct smi_info *info)
1448 unsigned int addr = info->io.addr_data;
1454 info->io_cleanup = port_cleanup;
1457 * Figure out the actual inb/inw/inl/etc routine to use based
1458 * upon the register size.
1460 switch (info->io.regsize) {
1462 info->io.inputb = port_inb;
1463 info->io.outputb = port_outb;
1466 info->io.inputb = port_inw;
1467 info->io.outputb = port_outw;
1470 info->io.inputb = port_inl;
1471 info->io.outputb = port_outl;
1474 dev_warn(info->dev, "Invalid register size: %d\n",
1480 * Some BIOSes reserve disjoint I/O regions in their ACPI
1481 * tables. This causes problems when trying to register the
1482 * entire I/O region. Therefore we must register each I/O
1485 for (idx = 0; idx < info->io_size; idx++) {
1486 if (request_region(addr + idx * info->io.regspacing,
1487 info->io.regsize, DEVICE_NAME) == NULL) {
1488 /* Undo allocations */
1490 release_region(addr + idx * info->io.regspacing,
1499 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1501 return readb((io->addr)+(offset * io->regspacing));
1504 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1507 writeb(b, (io->addr)+(offset * io->regspacing));
1510 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1512 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1516 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1519 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1522 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1524 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1528 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1531 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1535 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1537 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1541 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1544 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1548 static void mem_cleanup(struct smi_info *info)
1550 unsigned long addr = info->io.addr_data;
1553 if (info->io.addr) {
1554 iounmap(info->io.addr);
1556 mapsize = ((info->io_size * info->io.regspacing)
1557 - (info->io.regspacing - info->io.regsize));
1559 release_mem_region(addr, mapsize);
1563 static int mem_setup(struct smi_info *info)
1565 unsigned long addr = info->io.addr_data;
1571 info->io_cleanup = mem_cleanup;
1574 * Figure out the actual readb/readw/readl/etc routine to use based
1575 * upon the register size.
1577 switch (info->io.regsize) {
1579 info->io.inputb = intf_mem_inb;
1580 info->io.outputb = intf_mem_outb;
1583 info->io.inputb = intf_mem_inw;
1584 info->io.outputb = intf_mem_outw;
1587 info->io.inputb = intf_mem_inl;
1588 info->io.outputb = intf_mem_outl;
1592 info->io.inputb = mem_inq;
1593 info->io.outputb = mem_outq;
1597 dev_warn(info->dev, "Invalid register size: %d\n",
1603 * Calculate the total amount of memory to claim. This is an
1604 * unusual looking calculation, but it avoids claiming any
1605 * more memory than it has to. It will claim everything
1606 * between the first address to the end of the last full
1609 mapsize = ((info->io_size * info->io.regspacing)
1610 - (info->io.regspacing - info->io.regsize));
1612 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1615 info->io.addr = ioremap(addr, mapsize);
1616 if (info->io.addr == NULL) {
1617 release_mem_region(addr, mapsize);
1624 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1625 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1633 enum hotmod_op { HM_ADD, HM_REMOVE };
1634 struct hotmod_vals {
1638 static struct hotmod_vals hotmod_ops[] = {
1640 { "remove", HM_REMOVE },
1643 static struct hotmod_vals hotmod_si[] = {
1645 { "smic", SI_SMIC },
1649 static struct hotmod_vals hotmod_as[] = {
1650 { "mem", IPMI_MEM_ADDR_SPACE },
1651 { "i/o", IPMI_IO_ADDR_SPACE },
1655 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1660 s = strchr(*curr, ',');
1662 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1667 for (i = 0; hotmod_ops[i].name; i++) {
1668 if (strcmp(*curr, v[i].name) == 0) {
1675 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1679 static int check_hotmod_int_op(const char *curr, const char *option,
1680 const char *name, int *val)
1684 if (strcmp(curr, name) == 0) {
1686 printk(KERN_WARNING PFX
1687 "No option given for '%s'\n",
1691 *val = simple_strtoul(option, &n, 0);
1692 if ((*n != '\0') || (*option == '\0')) {
1693 printk(KERN_WARNING PFX
1694 "Bad option given for '%s'\n",
1703 static struct smi_info *smi_info_alloc(void)
1705 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1708 spin_lock_init(&info->si_lock);
1712 static int hotmod_handler(const char *val, struct kernel_param *kp)
1714 char *str = kstrdup(val, GFP_KERNEL);
1716 char *next, *curr, *s, *n, *o;
1718 enum si_type si_type;
1728 struct smi_info *info;
1733 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1736 while ((ival >= 0) && isspace(str[ival])) {
1741 for (curr = str; curr; curr = next) {
1746 ipmb = 0; /* Choose the default if not specified */
1748 next = strchr(curr, ':');
1754 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1759 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1764 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1768 s = strchr(curr, ',');
1773 addr = simple_strtoul(curr, &n, 0);
1774 if ((*n != '\0') || (*curr == '\0')) {
1775 printk(KERN_WARNING PFX "Invalid hotmod address"
1782 s = strchr(curr, ',');
1787 o = strchr(curr, '=');
1792 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1797 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1802 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1807 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1812 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1819 printk(KERN_WARNING PFX
1820 "Invalid hotmod option '%s'\n",
1826 info = smi_info_alloc();
1832 info->addr_source = SI_HOTMOD;
1833 info->si_type = si_type;
1834 info->io.addr_data = addr;
1835 info->io.addr_type = addr_space;
1836 if (addr_space == IPMI_MEM_ADDR_SPACE)
1837 info->io_setup = mem_setup;
1839 info->io_setup = port_setup;
1841 info->io.addr = NULL;
1842 info->io.regspacing = regspacing;
1843 if (!info->io.regspacing)
1844 info->io.regspacing = DEFAULT_REGSPACING;
1845 info->io.regsize = regsize;
1846 if (!info->io.regsize)
1847 info->io.regsize = DEFAULT_REGSPACING;
1848 info->io.regshift = regshift;
1851 info->irq_setup = std_irq_setup;
1852 info->slave_addr = ipmb;
1854 if (!add_smi(info)) {
1855 if (try_smi_init(info))
1856 cleanup_one_si(info);
1862 struct smi_info *e, *tmp_e;
1864 mutex_lock(&smi_infos_lock);
1865 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1866 if (e->io.addr_type != addr_space)
1868 if (e->si_type != si_type)
1870 if (e->io.addr_data == addr)
1873 mutex_unlock(&smi_infos_lock);
1882 static int hardcode_find_bmc(void)
1886 struct smi_info *info;
1888 for (i = 0; i < SI_MAX_PARMS; i++) {
1889 if (!ports[i] && !addrs[i])
1892 info = smi_info_alloc();
1896 info->addr_source = SI_HARDCODED;
1897 printk(KERN_INFO PFX "probing via hardcoded address\n");
1899 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1900 info->si_type = SI_KCS;
1901 } else if (strcmp(si_type[i], "smic") == 0) {
1902 info->si_type = SI_SMIC;
1903 } else if (strcmp(si_type[i], "bt") == 0) {
1904 info->si_type = SI_BT;
1906 printk(KERN_WARNING PFX "Interface type specified "
1907 "for interface %d, was invalid: %s\n",
1915 info->io_setup = port_setup;
1916 info->io.addr_data = ports[i];
1917 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1918 } else if (addrs[i]) {
1920 info->io_setup = mem_setup;
1921 info->io.addr_data = addrs[i];
1922 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1924 printk(KERN_WARNING PFX "Interface type specified "
1925 "for interface %d, but port and address were "
1926 "not set or set to zero.\n", i);
1931 info->io.addr = NULL;
1932 info->io.regspacing = regspacings[i];
1933 if (!info->io.regspacing)
1934 info->io.regspacing = DEFAULT_REGSPACING;
1935 info->io.regsize = regsizes[i];
1936 if (!info->io.regsize)
1937 info->io.regsize = DEFAULT_REGSPACING;
1938 info->io.regshift = regshifts[i];
1939 info->irq = irqs[i];
1941 info->irq_setup = std_irq_setup;
1942 info->slave_addr = slave_addrs[i];
1944 if (!add_smi(info)) {
1945 if (try_smi_init(info))
1946 cleanup_one_si(info);
1957 #include <linux/acpi.h>
1960 * Once we get an ACPI failure, we don't try any more, because we go
1961 * through the tables sequentially. Once we don't find a table, there
1964 static int acpi_failure;
1966 /* For GPE-type interrupts. */
1967 static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
1968 u32 gpe_number, void *context)
1970 struct smi_info *smi_info = context;
1971 unsigned long flags;
1976 spin_lock_irqsave(&(smi_info->si_lock), flags);
1978 smi_inc_stat(smi_info, interrupts);
1981 do_gettimeofday(&t);
1982 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1984 smi_event_handler(smi_info, 0);
1985 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1987 return ACPI_INTERRUPT_HANDLED;
1990 static void acpi_gpe_irq_cleanup(struct smi_info *info)
1995 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1998 static int acpi_gpe_irq_setup(struct smi_info *info)
2005 /* FIXME - is level triggered right? */
2006 status = acpi_install_gpe_handler(NULL,
2008 ACPI_GPE_LEVEL_TRIGGERED,
2011 if (status != AE_OK) {
2012 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
2013 " running polled\n", DEVICE_NAME, info->irq);
2017 info->irq_cleanup = acpi_gpe_irq_cleanup;
2018 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
2025 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2036 s8 CreatorRevision[4];
2039 s16 SpecificationRevision;
2042 * Bit 0 - SCI interrupt supported
2043 * Bit 1 - I/O APIC/SAPIC
2048 * If bit 0 of InterruptType is set, then this is the SCI
2049 * interrupt in the GPEx_STS register.
2056 * If bit 1 of InterruptType is set, then this is the I/O
2057 * APIC/SAPIC interrupt.
2059 u32 GlobalSystemInterrupt;
2061 /* The actual register address. */
2062 struct acpi_generic_address addr;
2066 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2069 static int try_init_spmi(struct SPMITable *spmi)
2071 struct smi_info *info;
2073 if (spmi->IPMIlegacy != 1) {
2074 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2078 info = smi_info_alloc();
2080 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2084 info->addr_source = SI_SPMI;
2085 printk(KERN_INFO PFX "probing via SPMI\n");
2087 /* Figure out the interface type. */
2088 switch (spmi->InterfaceType) {
2090 info->si_type = SI_KCS;
2093 info->si_type = SI_SMIC;
2096 info->si_type = SI_BT;
2099 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2100 spmi->InterfaceType);
2105 if (spmi->InterruptType & 1) {
2106 /* We've got a GPE interrupt. */
2107 info->irq = spmi->GPE;
2108 info->irq_setup = acpi_gpe_irq_setup;
2109 } else if (spmi->InterruptType & 2) {
2110 /* We've got an APIC/SAPIC interrupt. */
2111 info->irq = spmi->GlobalSystemInterrupt;
2112 info->irq_setup = std_irq_setup;
2114 /* Use the default interrupt setting. */
2116 info->irq_setup = NULL;
2119 if (spmi->addr.bit_width) {
2120 /* A (hopefully) properly formed register bit width. */
2121 info->io.regspacing = spmi->addr.bit_width / 8;
2123 info->io.regspacing = DEFAULT_REGSPACING;
2125 info->io.regsize = info->io.regspacing;
2126 info->io.regshift = spmi->addr.bit_offset;
2128 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2129 info->io_setup = mem_setup;
2130 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2131 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2132 info->io_setup = port_setup;
2133 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2136 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2139 info->io.addr_data = spmi->addr.address;
2141 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2142 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2143 info->io.addr_data, info->io.regsize, info->io.regspacing,
2152 static void spmi_find_bmc(void)
2155 struct SPMITable *spmi;
2164 for (i = 0; ; i++) {
2165 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2166 (struct acpi_table_header **)&spmi);
2167 if (status != AE_OK)
2170 try_init_spmi(spmi);
2174 static int ipmi_pnp_probe(struct pnp_dev *dev,
2175 const struct pnp_device_id *dev_id)
2177 struct acpi_device *acpi_dev;
2178 struct smi_info *info;
2179 struct resource *res, *res_second;
2182 unsigned long long tmp;
2184 acpi_dev = pnp_acpi_device(dev);
2188 info = smi_info_alloc();
2192 info->addr_source = SI_ACPI;
2193 printk(KERN_INFO PFX "probing via ACPI\n");
2195 handle = acpi_dev->handle;
2196 info->addr_info.acpi_info.acpi_handle = handle;
2198 /* _IFT tells us the interface type: KCS, BT, etc */
2199 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2200 if (ACPI_FAILURE(status))
2205 info->si_type = SI_KCS;
2208 info->si_type = SI_SMIC;
2211 info->si_type = SI_BT;
2214 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2218 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2220 info->io_setup = port_setup;
2221 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2223 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2225 info->io_setup = mem_setup;
2226 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2230 dev_err(&dev->dev, "no I/O or memory address\n");
2233 info->io.addr_data = res->start;
2235 info->io.regspacing = DEFAULT_REGSPACING;
2236 res_second = pnp_get_resource(dev,
2237 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2238 IORESOURCE_IO : IORESOURCE_MEM,
2241 if (res_second->start > info->io.addr_data)
2242 info->io.regspacing = res_second->start - info->io.addr_data;
2244 info->io.regsize = DEFAULT_REGSPACING;
2245 info->io.regshift = 0;
2247 /* If _GPE exists, use it; otherwise use standard interrupts */
2248 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2249 if (ACPI_SUCCESS(status)) {
2251 info->irq_setup = acpi_gpe_irq_setup;
2252 } else if (pnp_irq_valid(dev, 0)) {
2253 info->irq = pnp_irq(dev, 0);
2254 info->irq_setup = std_irq_setup;
2257 info->dev = &dev->dev;
2258 pnp_set_drvdata(dev, info);
2260 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2261 res, info->io.regsize, info->io.regspacing,
2274 static void ipmi_pnp_remove(struct pnp_dev *dev)
2276 struct smi_info *info = pnp_get_drvdata(dev);
2278 cleanup_one_si(info);
2281 static const struct pnp_device_id pnp_dev_table[] = {
2286 static struct pnp_driver ipmi_pnp_driver = {
2287 .name = DEVICE_NAME,
2288 .probe = ipmi_pnp_probe,
2289 .remove = ipmi_pnp_remove,
2290 .id_table = pnp_dev_table,
2295 struct dmi_ipmi_data {
2298 unsigned long base_addr;
2304 static int decode_dmi(const struct dmi_header *dm,
2305 struct dmi_ipmi_data *dmi)
2307 const u8 *data = (const u8 *)dm;
2308 unsigned long base_addr;
2310 u8 len = dm->length;
2312 dmi->type = data[4];
2314 memcpy(&base_addr, data+8, sizeof(unsigned long));
2316 if (base_addr & 1) {
2318 base_addr &= 0xFFFE;
2319 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2322 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2324 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2326 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2328 dmi->irq = data[0x11];
2330 /* The top two bits of byte 0x10 hold the register spacing. */
2331 reg_spacing = (data[0x10] & 0xC0) >> 6;
2332 switch (reg_spacing) {
2333 case 0x00: /* Byte boundaries */
2336 case 0x01: /* 32-bit boundaries */
2339 case 0x02: /* 16-byte boundaries */
2343 /* Some other interface, just ignore it. */
2349 * Note that technically, the lower bit of the base
2350 * address should be 1 if the address is I/O and 0 if
2351 * the address is in memory. So many systems get that
2352 * wrong (and all that I have seen are I/O) so we just
2353 * ignore that bit and assume I/O. Systems that use
2354 * memory should use the newer spec, anyway.
2356 dmi->base_addr = base_addr & 0xfffe;
2357 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2361 dmi->slave_addr = data[6];
2366 static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2368 struct smi_info *info;
2370 info = smi_info_alloc();
2372 printk(KERN_ERR PFX "Could not allocate SI data\n");
2376 info->addr_source = SI_SMBIOS;
2377 printk(KERN_INFO PFX "probing via SMBIOS\n");
2379 switch (ipmi_data->type) {
2380 case 0x01: /* KCS */
2381 info->si_type = SI_KCS;
2383 case 0x02: /* SMIC */
2384 info->si_type = SI_SMIC;
2387 info->si_type = SI_BT;
2394 switch (ipmi_data->addr_space) {
2395 case IPMI_MEM_ADDR_SPACE:
2396 info->io_setup = mem_setup;
2397 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2400 case IPMI_IO_ADDR_SPACE:
2401 info->io_setup = port_setup;
2402 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2407 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2408 ipmi_data->addr_space);
2411 info->io.addr_data = ipmi_data->base_addr;
2413 info->io.regspacing = ipmi_data->offset;
2414 if (!info->io.regspacing)
2415 info->io.regspacing = DEFAULT_REGSPACING;
2416 info->io.regsize = DEFAULT_REGSPACING;
2417 info->io.regshift = 0;
2419 info->slave_addr = ipmi_data->slave_addr;
2421 info->irq = ipmi_data->irq;
2423 info->irq_setup = std_irq_setup;
2425 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2426 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2427 info->io.addr_data, info->io.regsize, info->io.regspacing,
2434 static void dmi_find_bmc(void)
2436 const struct dmi_device *dev = NULL;
2437 struct dmi_ipmi_data data;
2440 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2441 memset(&data, 0, sizeof(data));
2442 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2445 try_init_dmi(&data);
2448 #endif /* CONFIG_DMI */
2452 #define PCI_ERMC_CLASSCODE 0x0C0700
2453 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2454 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2455 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2456 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2457 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2459 #define PCI_HP_VENDOR_ID 0x103C
2460 #define PCI_MMC_DEVICE_ID 0x121A
2461 #define PCI_MMC_ADDR_CW 0x10
2463 static void ipmi_pci_cleanup(struct smi_info *info)
2465 struct pci_dev *pdev = info->addr_source_data;
2467 pci_disable_device(pdev);
2470 static int ipmi_pci_probe_regspacing(struct smi_info *info)
2472 if (info->si_type == SI_KCS) {
2473 unsigned char status;
2476 info->io.regsize = DEFAULT_REGSIZE;
2477 info->io.regshift = 0;
2479 info->handlers = &kcs_smi_handlers;
2481 /* detect 1, 4, 16byte spacing */
2482 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
2483 info->io.regspacing = regspacing;
2484 if (info->io_setup(info)) {
2486 "Could not setup I/O space\n");
2487 return DEFAULT_REGSPACING;
2489 /* write invalid cmd */
2490 info->io.outputb(&info->io, 1, 0x10);
2491 /* read status back */
2492 status = info->io.inputb(&info->io, 1);
2493 info->io_cleanup(info);
2499 return DEFAULT_REGSPACING;
2502 static int ipmi_pci_probe(struct pci_dev *pdev,
2503 const struct pci_device_id *ent)
2506 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2507 struct smi_info *info;
2509 info = smi_info_alloc();
2513 info->addr_source = SI_PCI;
2514 dev_info(&pdev->dev, "probing via PCI");
2516 switch (class_type) {
2517 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2518 info->si_type = SI_SMIC;
2521 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2522 info->si_type = SI_KCS;
2525 case PCI_ERMC_CLASSCODE_TYPE_BT:
2526 info->si_type = SI_BT;
2531 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2535 rv = pci_enable_device(pdev);
2537 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2542 info->addr_source_cleanup = ipmi_pci_cleanup;
2543 info->addr_source_data = pdev;
2545 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2546 info->io_setup = port_setup;
2547 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2549 info->io_setup = mem_setup;
2550 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2552 info->io.addr_data = pci_resource_start(pdev, 0);
2554 info->io.regspacing = ipmi_pci_probe_regspacing(info);
2555 info->io.regsize = DEFAULT_REGSIZE;
2556 info->io.regshift = 0;
2558 info->irq = pdev->irq;
2560 info->irq_setup = std_irq_setup;
2562 info->dev = &pdev->dev;
2563 pci_set_drvdata(pdev, info);
2565 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2566 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2575 static void ipmi_pci_remove(struct pci_dev *pdev)
2577 struct smi_info *info = pci_get_drvdata(pdev);
2578 cleanup_one_si(info);
2581 static struct pci_device_id ipmi_pci_devices[] = {
2582 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2583 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2586 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2588 static struct pci_driver ipmi_pci_driver = {
2589 .name = DEVICE_NAME,
2590 .id_table = ipmi_pci_devices,
2591 .probe = ipmi_pci_probe,
2592 .remove = ipmi_pci_remove,
2594 #endif /* CONFIG_PCI */
2596 static struct of_device_id ipmi_match[];
2597 static int ipmi_probe(struct platform_device *dev)
2600 const struct of_device_id *match;
2601 struct smi_info *info;
2602 struct resource resource;
2603 const __be32 *regsize, *regspacing, *regshift;
2604 struct device_node *np = dev->dev.of_node;
2608 dev_info(&dev->dev, "probing via device tree\n");
2610 match = of_match_device(ipmi_match, &dev->dev);
2614 ret = of_address_to_resource(np, 0, &resource);
2616 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2620 regsize = of_get_property(np, "reg-size", &proplen);
2621 if (regsize && proplen != 4) {
2622 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2626 regspacing = of_get_property(np, "reg-spacing", &proplen);
2627 if (regspacing && proplen != 4) {
2628 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2632 regshift = of_get_property(np, "reg-shift", &proplen);
2633 if (regshift && proplen != 4) {
2634 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2638 info = smi_info_alloc();
2642 "could not allocate memory for OF probe\n");
2646 info->si_type = (enum si_type) match->data;
2647 info->addr_source = SI_DEVICETREE;
2648 info->irq_setup = std_irq_setup;
2650 if (resource.flags & IORESOURCE_IO) {
2651 info->io_setup = port_setup;
2652 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2654 info->io_setup = mem_setup;
2655 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2658 info->io.addr_data = resource.start;
2660 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2661 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2662 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2664 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2665 info->dev = &dev->dev;
2667 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2668 info->io.addr_data, info->io.regsize, info->io.regspacing,
2671 dev_set_drvdata(&dev->dev, info);
2673 if (add_smi(info)) {
2681 static int ipmi_remove(struct platform_device *dev)
2684 cleanup_one_si(dev_get_drvdata(&dev->dev));
2689 static struct of_device_id ipmi_match[] =
2691 { .type = "ipmi", .compatible = "ipmi-kcs",
2692 .data = (void *)(unsigned long) SI_KCS },
2693 { .type = "ipmi", .compatible = "ipmi-smic",
2694 .data = (void *)(unsigned long) SI_SMIC },
2695 { .type = "ipmi", .compatible = "ipmi-bt",
2696 .data = (void *)(unsigned long) SI_BT },
2700 static struct platform_driver ipmi_driver = {
2702 .name = DEVICE_NAME,
2703 .owner = THIS_MODULE,
2704 .of_match_table = ipmi_match,
2706 .probe = ipmi_probe,
2707 .remove = ipmi_remove,
2710 static int wait_for_msg_done(struct smi_info *smi_info)
2712 enum si_sm_result smi_result;
2714 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2716 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2717 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2718 schedule_timeout_uninterruptible(1);
2719 smi_result = smi_info->handlers->event(
2720 smi_info->si_sm, 100);
2721 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2722 smi_result = smi_info->handlers->event(
2723 smi_info->si_sm, 0);
2727 if (smi_result == SI_SM_HOSED)
2729 * We couldn't get the state machine to run, so whatever's at
2730 * the port is probably not an IPMI SMI interface.
2737 static int try_get_dev_id(struct smi_info *smi_info)
2739 unsigned char msg[2];
2740 unsigned char *resp;
2741 unsigned long resp_len;
2744 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2749 * Do a Get Device ID command, since it comes back with some
2752 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2753 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2754 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2756 rv = wait_for_msg_done(smi_info);
2760 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2761 resp, IPMI_MAX_MSG_LENGTH);
2763 /* Check and record info from the get device id, in case we need it. */
2764 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2771 static int try_enable_event_buffer(struct smi_info *smi_info)
2773 unsigned char msg[3];
2774 unsigned char *resp;
2775 unsigned long resp_len;
2778 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2782 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2783 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2784 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2786 rv = wait_for_msg_done(smi_info);
2788 printk(KERN_WARNING PFX "Error getting response from get"
2789 " global enables command, the event buffer is not"
2794 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2795 resp, IPMI_MAX_MSG_LENGTH);
2798 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2799 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2801 printk(KERN_WARNING PFX "Invalid return from get global"
2802 " enables command, cannot enable the event buffer.\n");
2807 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2808 /* buffer is already enabled, nothing to do. */
2811 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2812 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2813 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2814 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2816 rv = wait_for_msg_done(smi_info);
2818 printk(KERN_WARNING PFX "Error getting response from set"
2819 " global, enables command, the event buffer is not"
2824 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2825 resp, IPMI_MAX_MSG_LENGTH);
2828 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2829 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2830 printk(KERN_WARNING PFX "Invalid return from get global,"
2831 "enables command, not enable the event buffer.\n");
2838 * An error when setting the event buffer bit means
2839 * that the event buffer is not supported.
2847 static int smi_type_proc_show(struct seq_file *m, void *v)
2849 struct smi_info *smi = m->private;
2851 return seq_printf(m, "%s\n", si_to_str[smi->si_type]);
2854 static int smi_type_proc_open(struct inode *inode, struct file *file)
2856 return single_open(file, smi_type_proc_show, PDE_DATA(inode));
2859 static const struct file_operations smi_type_proc_ops = {
2860 .open = smi_type_proc_open,
2862 .llseek = seq_lseek,
2863 .release = single_release,
2866 static int smi_si_stats_proc_show(struct seq_file *m, void *v)
2868 struct smi_info *smi = m->private;
2870 seq_printf(m, "interrupts_enabled: %d\n",
2871 smi->irq && !smi->interrupt_disabled);
2872 seq_printf(m, "short_timeouts: %u\n",
2873 smi_get_stat(smi, short_timeouts));
2874 seq_printf(m, "long_timeouts: %u\n",
2875 smi_get_stat(smi, long_timeouts));
2876 seq_printf(m, "idles: %u\n",
2877 smi_get_stat(smi, idles));
2878 seq_printf(m, "interrupts: %u\n",
2879 smi_get_stat(smi, interrupts));
2880 seq_printf(m, "attentions: %u\n",
2881 smi_get_stat(smi, attentions));
2882 seq_printf(m, "flag_fetches: %u\n",
2883 smi_get_stat(smi, flag_fetches));
2884 seq_printf(m, "hosed_count: %u\n",
2885 smi_get_stat(smi, hosed_count));
2886 seq_printf(m, "complete_transactions: %u\n",
2887 smi_get_stat(smi, complete_transactions));
2888 seq_printf(m, "events: %u\n",
2889 smi_get_stat(smi, events));
2890 seq_printf(m, "watchdog_pretimeouts: %u\n",
2891 smi_get_stat(smi, watchdog_pretimeouts));
2892 seq_printf(m, "incoming_messages: %u\n",
2893 smi_get_stat(smi, incoming_messages));
2897 static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
2899 return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
2902 static const struct file_operations smi_si_stats_proc_ops = {
2903 .open = smi_si_stats_proc_open,
2905 .llseek = seq_lseek,
2906 .release = single_release,
2909 static int smi_params_proc_show(struct seq_file *m, void *v)
2911 struct smi_info *smi = m->private;
2913 return seq_printf(m,
2914 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2915 si_to_str[smi->si_type],
2916 addr_space_to_str[smi->io.addr_type],
2925 static int smi_params_proc_open(struct inode *inode, struct file *file)
2927 return single_open(file, smi_params_proc_show, PDE_DATA(inode));
2930 static const struct file_operations smi_params_proc_ops = {
2931 .open = smi_params_proc_open,
2933 .llseek = seq_lseek,
2934 .release = single_release,
2938 * oem_data_avail_to_receive_msg_avail
2939 * @info - smi_info structure with msg_flags set
2941 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2942 * Returns 1 indicating need to re-run handle_flags().
2944 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2946 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
2952 * setup_dell_poweredge_oem_data_handler
2953 * @info - smi_info.device_id must be populated
2955 * Systems that match, but have firmware version < 1.40 may assert
2956 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2957 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2958 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2959 * as RECEIVE_MSG_AVAIL instead.
2961 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2962 * assert the OEM[012] bits, and if it did, the driver would have to
2963 * change to handle that properly, we don't actually check for the
2965 * Device ID = 0x20 BMC on PowerEdge 8G servers
2966 * Device Revision = 0x80
2967 * Firmware Revision1 = 0x01 BMC version 1.40
2968 * Firmware Revision2 = 0x40 BCD encoded
2969 * IPMI Version = 0x51 IPMI 1.5
2970 * Manufacturer ID = A2 02 00 Dell IANA
2972 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2973 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2976 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2977 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2978 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2979 #define DELL_IANA_MFR_ID 0x0002a2
2980 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2982 struct ipmi_device_id *id = &smi_info->device_id;
2983 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
2984 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2985 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
2986 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
2987 smi_info->oem_data_avail_handler =
2988 oem_data_avail_to_receive_msg_avail;
2989 } else if (ipmi_version_major(id) < 1 ||
2990 (ipmi_version_major(id) == 1 &&
2991 ipmi_version_minor(id) < 5)) {
2992 smi_info->oem_data_avail_handler =
2993 oem_data_avail_to_receive_msg_avail;
2998 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2999 static void return_hosed_msg_badsize(struct smi_info *smi_info)
3001 struct ipmi_smi_msg *msg = smi_info->curr_msg;
3003 /* Make it a response */
3004 msg->rsp[0] = msg->data[0] | 4;
3005 msg->rsp[1] = msg->data[1];
3006 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
3008 smi_info->curr_msg = NULL;
3009 deliver_recv_msg(smi_info, msg);
3013 * dell_poweredge_bt_xaction_handler
3014 * @info - smi_info.device_id must be populated
3016 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3017 * not respond to a Get SDR command if the length of the data
3018 * requested is exactly 0x3A, which leads to command timeouts and no
3019 * data returned. This intercepts such commands, and causes userspace
3020 * callers to try again with a different-sized buffer, which succeeds.
3023 #define STORAGE_NETFN 0x0A
3024 #define STORAGE_CMD_GET_SDR 0x23
3025 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
3026 unsigned long unused,
3029 struct smi_info *smi_info = in;
3030 unsigned char *data = smi_info->curr_msg->data;
3031 unsigned int size = smi_info->curr_msg->data_size;
3033 (data[0]>>2) == STORAGE_NETFN &&
3034 data[1] == STORAGE_CMD_GET_SDR &&
3036 return_hosed_msg_badsize(smi_info);
3042 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
3043 .notifier_call = dell_poweredge_bt_xaction_handler,
3047 * setup_dell_poweredge_bt_xaction_handler
3048 * @info - smi_info.device_id must be filled in already
3050 * Fills in smi_info.device_id.start_transaction_pre_hook
3051 * when we know what function to use there.
3054 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
3056 struct ipmi_device_id *id = &smi_info->device_id;
3057 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
3058 smi_info->si_type == SI_BT)
3059 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
3063 * setup_oem_data_handler
3064 * @info - smi_info.device_id must be filled in already
3066 * Fills in smi_info.device_id.oem_data_available_handler
3067 * when we know what function to use there.
3070 static void setup_oem_data_handler(struct smi_info *smi_info)
3072 setup_dell_poweredge_oem_data_handler(smi_info);
3075 static void setup_xaction_handlers(struct smi_info *smi_info)
3077 setup_dell_poweredge_bt_xaction_handler(smi_info);
3080 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3082 if (smi_info->intf) {
3084 * The timer and thread are only running if the
3085 * interface has been started up and registered.
3087 if (smi_info->thread != NULL)
3088 kthread_stop(smi_info->thread);
3089 del_timer_sync(&smi_info->si_timer);
3093 static struct ipmi_default_vals
3099 { .type = SI_KCS, .port = 0xca2 },
3100 { .type = SI_SMIC, .port = 0xca9 },
3101 { .type = SI_BT, .port = 0xe4 },
3105 static void default_find_bmc(void)
3107 struct smi_info *info;
3110 for (i = 0; ; i++) {
3111 if (!ipmi_defaults[i].port)
3114 if (check_legacy_ioport(ipmi_defaults[i].port))
3117 info = smi_info_alloc();
3121 info->addr_source = SI_DEFAULT;
3123 info->si_type = ipmi_defaults[i].type;
3124 info->io_setup = port_setup;
3125 info->io.addr_data = ipmi_defaults[i].port;
3126 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3128 info->io.addr = NULL;
3129 info->io.regspacing = DEFAULT_REGSPACING;
3130 info->io.regsize = DEFAULT_REGSPACING;
3131 info->io.regshift = 0;
3133 if (add_smi(info) == 0) {
3134 if ((try_smi_init(info)) == 0) {
3136 printk(KERN_INFO PFX "Found default %s"
3137 " state machine at %s address 0x%lx\n",
3138 si_to_str[info->si_type],
3139 addr_space_to_str[info->io.addr_type],
3140 info->io.addr_data);
3142 cleanup_one_si(info);
3149 static int is_new_interface(struct smi_info *info)
3153 list_for_each_entry(e, &smi_infos, link) {
3154 if (e->io.addr_type != info->io.addr_type)
3156 if (e->io.addr_data == info->io.addr_data)
3163 static int add_smi(struct smi_info *new_smi)
3167 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3168 ipmi_addr_src_to_str[new_smi->addr_source],
3169 si_to_str[new_smi->si_type]);
3170 mutex_lock(&smi_infos_lock);
3171 if (!is_new_interface(new_smi)) {
3172 printk(KERN_CONT " duplicate interface\n");
3177 printk(KERN_CONT "\n");
3179 /* So we know not to free it unless we have allocated one. */
3180 new_smi->intf = NULL;
3181 new_smi->si_sm = NULL;
3182 new_smi->handlers = NULL;
3184 list_add_tail(&new_smi->link, &smi_infos);
3187 mutex_unlock(&smi_infos_lock);
3191 static int try_smi_init(struct smi_info *new_smi)
3196 printk(KERN_INFO PFX "Trying %s-specified %s state"
3197 " machine at %s address 0x%lx, slave address 0x%x,"
3199 ipmi_addr_src_to_str[new_smi->addr_source],
3200 si_to_str[new_smi->si_type],
3201 addr_space_to_str[new_smi->io.addr_type],
3202 new_smi->io.addr_data,
3203 new_smi->slave_addr, new_smi->irq);
3205 switch (new_smi->si_type) {
3207 new_smi->handlers = &kcs_smi_handlers;
3211 new_smi->handlers = &smic_smi_handlers;
3215 new_smi->handlers = &bt_smi_handlers;
3219 /* No support for anything else yet. */
3224 /* Allocate the state machine's data and initialize it. */
3225 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3226 if (!new_smi->si_sm) {
3228 "Could not allocate state machine memory\n");
3232 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3235 /* Now that we know the I/O size, we can set up the I/O. */
3236 rv = new_smi->io_setup(new_smi);
3238 printk(KERN_ERR PFX "Could not set up I/O space\n");
3242 /* Do low-level detection first. */
3243 if (new_smi->handlers->detect(new_smi->si_sm)) {
3244 if (new_smi->addr_source)
3245 printk(KERN_INFO PFX "Interface detection failed\n");
3251 * Attempt a get device id command. If it fails, we probably
3252 * don't have a BMC here.
3254 rv = try_get_dev_id(new_smi);
3256 if (new_smi->addr_source)
3257 printk(KERN_INFO PFX "There appears to be no BMC"
3258 " at this location\n");
3262 setup_oem_data_handler(new_smi);
3263 setup_xaction_handlers(new_smi);
3265 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3266 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3267 new_smi->curr_msg = NULL;
3268 atomic_set(&new_smi->req_events, 0);
3269 new_smi->run_to_completion = 0;
3270 for (i = 0; i < SI_NUM_STATS; i++)
3271 atomic_set(&new_smi->stats[i], 0);
3273 new_smi->interrupt_disabled = 1;
3274 atomic_set(&new_smi->stop_operation, 0);
3275 new_smi->intf_num = smi_num;
3278 rv = try_enable_event_buffer(new_smi);
3280 new_smi->has_event_buffer = 1;
3283 * Start clearing the flags before we enable interrupts or the
3284 * timer to avoid racing with the timer.
3286 start_clear_flags(new_smi);
3287 /* IRQ is defined to be set when non-zero. */
3289 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3291 if (!new_smi->dev) {
3293 * If we don't already have a device from something
3294 * else (like PCI), then register a new one.
3296 new_smi->pdev = platform_device_alloc("ipmi_si",
3298 if (!new_smi->pdev) {
3300 "Unable to allocate platform device\n");
3303 new_smi->dev = &new_smi->pdev->dev;
3304 new_smi->dev->driver = &ipmi_driver.driver;
3306 rv = platform_device_add(new_smi->pdev);
3309 "Unable to register system interface device:"
3314 new_smi->dev_registered = 1;
3317 rv = ipmi_register_smi(&handlers,
3319 &new_smi->device_id,
3322 new_smi->slave_addr);
3324 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3326 goto out_err_stop_timer;
3329 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3333 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3334 goto out_err_stop_timer;
3337 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3338 &smi_si_stats_proc_ops,
3341 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3342 goto out_err_stop_timer;
3345 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3346 &smi_params_proc_ops,
3349 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3350 goto out_err_stop_timer;
3353 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3354 si_to_str[new_smi->si_type]);
3359 atomic_inc(&new_smi->stop_operation);
3360 wait_for_timer_and_thread(new_smi);
3363 new_smi->interrupt_disabled = 1;
3365 if (new_smi->intf) {
3366 ipmi_unregister_smi(new_smi->intf);
3367 new_smi->intf = NULL;
3370 if (new_smi->irq_cleanup) {
3371 new_smi->irq_cleanup(new_smi);
3372 new_smi->irq_cleanup = NULL;
3376 * Wait until we know that we are out of any interrupt
3377 * handlers might have been running before we freed the
3380 synchronize_sched();
3382 if (new_smi->si_sm) {
3383 if (new_smi->handlers)
3384 new_smi->handlers->cleanup(new_smi->si_sm);
3385 kfree(new_smi->si_sm);
3386 new_smi->si_sm = NULL;
3388 if (new_smi->addr_source_cleanup) {
3389 new_smi->addr_source_cleanup(new_smi);
3390 new_smi->addr_source_cleanup = NULL;
3392 if (new_smi->io_cleanup) {
3393 new_smi->io_cleanup(new_smi);
3394 new_smi->io_cleanup = NULL;
3397 if (new_smi->dev_registered) {
3398 platform_device_unregister(new_smi->pdev);
3399 new_smi->dev_registered = 0;
3405 static int init_ipmi_si(void)
3411 enum ipmi_addr_src type = SI_INVALID;
3417 if (si_tryplatform) {
3418 rv = platform_driver_register(&ipmi_driver);
3420 printk(KERN_ERR PFX "Unable to register "
3421 "driver: %d\n", rv);
3426 /* Parse out the si_type string into its components. */
3429 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3431 str = strchr(str, ',');
3441 printk(KERN_INFO "IPMI System Interface driver.\n");
3443 /* If the user gave us a device, they presumably want us to use it */
3444 if (!hardcode_find_bmc())
3449 rv = pci_register_driver(&ipmi_pci_driver);
3451 printk(KERN_ERR PFX "Unable to register "
3452 "PCI driver: %d\n", rv);
3460 pnp_register_driver(&ipmi_pnp_driver);
3475 /* We prefer devices with interrupts, but in the case of a machine
3476 with multiple BMCs we assume that there will be several instances
3477 of a given type so if we succeed in registering a type then also
3478 try to register everything else of the same type */
3480 mutex_lock(&smi_infos_lock);
3481 list_for_each_entry(e, &smi_infos, link) {
3482 /* Try to register a device if it has an IRQ and we either
3483 haven't successfully registered a device yet or this
3484 device has the same type as one we successfully registered */
3485 if (e->irq && (!type || e->addr_source == type)) {
3486 if (!try_smi_init(e)) {
3487 type = e->addr_source;
3492 /* type will only have been set if we successfully registered an si */
3494 mutex_unlock(&smi_infos_lock);
3498 /* Fall back to the preferred device */
3500 list_for_each_entry(e, &smi_infos, link) {
3501 if (!e->irq && (!type || e->addr_source == type)) {
3502 if (!try_smi_init(e)) {
3503 type = e->addr_source;
3507 mutex_unlock(&smi_infos_lock);
3512 if (si_trydefaults) {
3513 mutex_lock(&smi_infos_lock);
3514 if (list_empty(&smi_infos)) {
3515 /* No BMC was found, try defaults. */
3516 mutex_unlock(&smi_infos_lock);
3519 mutex_unlock(&smi_infos_lock);
3522 mutex_lock(&smi_infos_lock);
3523 if (unload_when_empty && list_empty(&smi_infos)) {
3524 mutex_unlock(&smi_infos_lock);
3526 printk(KERN_WARNING PFX
3527 "Unable to find any System Interface(s)\n");
3530 mutex_unlock(&smi_infos_lock);
3534 module_init(init_ipmi_si);
3536 static void cleanup_one_si(struct smi_info *to_clean)
3539 unsigned long flags;
3544 list_del(&to_clean->link);
3546 /* Tell the driver that we are shutting down. */
3547 atomic_inc(&to_clean->stop_operation);
3550 * Make sure the timer and thread are stopped and will not run
3553 wait_for_timer_and_thread(to_clean);
3556 * Timeouts are stopped, now make sure the interrupts are off
3557 * for the device. A little tricky with locks to make sure
3558 * there are no races.
3560 spin_lock_irqsave(&to_clean->si_lock, flags);
3561 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3562 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3564 schedule_timeout_uninterruptible(1);
3565 spin_lock_irqsave(&to_clean->si_lock, flags);
3567 disable_si_irq(to_clean);
3568 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3569 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3571 schedule_timeout_uninterruptible(1);
3574 /* Clean up interrupts and make sure that everything is done. */
3575 if (to_clean->irq_cleanup)
3576 to_clean->irq_cleanup(to_clean);
3577 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3579 schedule_timeout_uninterruptible(1);
3583 rv = ipmi_unregister_smi(to_clean->intf);
3586 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3590 if (to_clean->handlers)
3591 to_clean->handlers->cleanup(to_clean->si_sm);
3593 kfree(to_clean->si_sm);
3595 if (to_clean->addr_source_cleanup)
3596 to_clean->addr_source_cleanup(to_clean);
3597 if (to_clean->io_cleanup)
3598 to_clean->io_cleanup(to_clean);
3600 if (to_clean->dev_registered)
3601 platform_device_unregister(to_clean->pdev);
3606 static void cleanup_ipmi_si(void)
3608 struct smi_info *e, *tmp_e;
3615 pci_unregister_driver(&ipmi_pci_driver);
3619 pnp_unregister_driver(&ipmi_pnp_driver);
3622 platform_driver_unregister(&ipmi_driver);
3624 mutex_lock(&smi_infos_lock);
3625 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3627 mutex_unlock(&smi_infos_lock);
3629 module_exit(cleanup_ipmi_si);
3631 MODULE_LICENSE("GPL");
3632 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3633 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3634 " system interfaces.");