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/dmi.h>
65 #include <linux/string.h>
66 #include <linux/ctype.h>
67 #include <linux/pnp.h>
68 #include <linux/of_device.h>
69 #include <linux/of_platform.h>
70 #include <linux/of_address.h>
71 #include <linux/of_irq.h>
74 #include <asm/hardware.h> /* for register_parisc_driver() stuff */
75 #include <asm/parisc-device.h>
78 #define PFX "ipmi_si: "
80 /* Measure times between events in the driver. */
83 /* Call every 10 ms. */
84 #define SI_TIMEOUT_TIME_USEC 10000
85 #define SI_USEC_PER_JIFFY (1000000/HZ)
86 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
87 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
95 SI_CLEARING_FLAGS_THEN_SET_IRQ,
97 SI_ENABLE_INTERRUPTS1,
98 SI_ENABLE_INTERRUPTS2,
99 SI_DISABLE_INTERRUPTS1,
100 SI_DISABLE_INTERRUPTS2
101 /* FIXME - add watchdog stuff. */
104 /* Some BT-specific defines we need here. */
105 #define IPMI_BT_INTMASK_REG 2
106 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
107 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
110 SI_KCS, SI_SMIC, SI_BT
112 static char *si_to_str[] = { "kcs", "smic", "bt" };
114 static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
115 "ACPI", "SMBIOS", "PCI",
116 "device-tree", "default" };
118 #define DEVICE_NAME "ipmi_si"
120 static struct platform_driver ipmi_driver;
123 * Indexes into stats[] in smi_info below.
125 enum si_stat_indexes {
127 * Number of times the driver requested a timer while an operation
130 SI_STAT_short_timeouts = 0,
133 * Number of times the driver requested a timer while nothing was in
136 SI_STAT_long_timeouts,
138 /* Number of times the interface was idle while being polled. */
141 /* Number of interrupts the driver handled. */
144 /* Number of time the driver got an ATTN from the hardware. */
147 /* Number of times the driver requested flags from the hardware. */
148 SI_STAT_flag_fetches,
150 /* Number of times the hardware didn't follow the state machine. */
153 /* Number of completed messages. */
154 SI_STAT_complete_transactions,
156 /* Number of IPMI events received from the hardware. */
159 /* Number of watchdog pretimeouts. */
160 SI_STAT_watchdog_pretimeouts,
162 /* Number of asynchronous messages received. */
163 SI_STAT_incoming_messages,
166 /* This *must* remain last, add new values above this. */
173 struct si_sm_data *si_sm;
174 struct si_sm_handlers *handlers;
175 enum si_type si_type;
177 struct list_head xmit_msgs;
178 struct list_head hp_xmit_msgs;
179 struct ipmi_smi_msg *curr_msg;
180 enum si_intf_state si_state;
183 * Used to handle the various types of I/O that can occur with
187 int (*io_setup)(struct smi_info *info);
188 void (*io_cleanup)(struct smi_info *info);
189 int (*irq_setup)(struct smi_info *info);
190 void (*irq_cleanup)(struct smi_info *info);
191 unsigned int io_size;
192 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
193 void (*addr_source_cleanup)(struct smi_info *info);
194 void *addr_source_data;
197 * Per-OEM handler, called from handle_flags(). Returns 1
198 * when handle_flags() needs to be re-run or 0 indicating it
199 * set si_state itself.
201 int (*oem_data_avail_handler)(struct smi_info *smi_info);
204 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
205 * is set to hold the flags until we are done handling everything
208 #define RECEIVE_MSG_AVAIL 0x01
209 #define EVENT_MSG_BUFFER_FULL 0x02
210 #define WDT_PRE_TIMEOUT_INT 0x08
211 #define OEM0_DATA_AVAIL 0x20
212 #define OEM1_DATA_AVAIL 0x40
213 #define OEM2_DATA_AVAIL 0x80
214 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
217 unsigned char msg_flags;
219 /* Does the BMC have an event buffer? */
220 bool has_event_buffer;
223 * If set to true, this will request events the next time the
224 * state machine is idle.
229 * If true, run the state machine to completion on every send
230 * call. Generally used after a panic to make sure stuff goes
233 bool run_to_completion;
235 /* The I/O port of an SI interface. */
239 * The space between start addresses of the two ports. For
240 * instance, if the first port is 0xca2 and the spacing is 4, then
241 * the second port is 0xca6.
243 unsigned int spacing;
245 /* zero if no irq; */
248 /* The timer for this si. */
249 struct timer_list si_timer;
251 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
254 /* The time (in jiffies) the last timeout occurred at. */
255 unsigned long last_timeout_jiffies;
257 /* Used to gracefully stop the timer without race conditions. */
258 atomic_t stop_operation;
260 /* Are we waiting for the events, pretimeouts, received msgs? */
264 * The driver will disable interrupts when it gets into a
265 * situation where it cannot handle messages due to lack of
266 * memory. Once that situation clears up, it will re-enable
269 bool interrupt_disabled;
271 /* From the get device id response... */
272 struct ipmi_device_id device_id;
274 /* Driver model stuff. */
276 struct platform_device *pdev;
279 * True if we allocated the device, false if it came from
280 * someplace else (like PCI).
284 /* Slave address, could be reported from DMI. */
285 unsigned char slave_addr;
287 /* Counters and things for the proc filesystem. */
288 atomic_t stats[SI_NUM_STATS];
290 struct task_struct *thread;
292 struct list_head link;
293 union ipmi_smi_info_union addr_info;
296 #define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298 #define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
301 #define SI_MAX_PARMS 4
303 static int force_kipmid[SI_MAX_PARMS];
304 static int num_force_kipmid;
306 static bool pci_registered;
309 static bool pnp_registered;
312 static bool parisc_registered;
315 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
316 static int num_max_busy_us;
318 static bool unload_when_empty = true;
320 static int add_smi(struct smi_info *smi);
321 static int try_smi_init(struct smi_info *smi);
322 static void cleanup_one_si(struct smi_info *to_clean);
323 static void cleanup_ipmi_si(void);
325 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
326 static int register_xaction_notifier(struct notifier_block *nb)
328 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
331 static void deliver_recv_msg(struct smi_info *smi_info,
332 struct ipmi_smi_msg *msg)
334 /* Deliver the message to the upper layer. */
335 ipmi_smi_msg_received(smi_info->intf, msg);
338 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
340 struct ipmi_smi_msg *msg = smi_info->curr_msg;
342 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
343 cCode = IPMI_ERR_UNSPECIFIED;
344 /* else use it as is */
346 /* Make it a response */
347 msg->rsp[0] = msg->data[0] | 4;
348 msg->rsp[1] = msg->data[1];
352 smi_info->curr_msg = NULL;
353 deliver_recv_msg(smi_info, msg);
356 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
359 struct list_head *entry = NULL;
364 /* Pick the high priority queue first. */
365 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
366 entry = smi_info->hp_xmit_msgs.next;
367 } else if (!list_empty(&(smi_info->xmit_msgs))) {
368 entry = smi_info->xmit_msgs.next;
372 smi_info->curr_msg = NULL;
378 smi_info->curr_msg = list_entry(entry,
383 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
385 err = atomic_notifier_call_chain(&xaction_notifier_list,
387 if (err & NOTIFY_STOP_MASK) {
388 rv = SI_SM_CALL_WITHOUT_DELAY;
391 err = smi_info->handlers->start_transaction(
393 smi_info->curr_msg->data,
394 smi_info->curr_msg->data_size);
396 return_hosed_msg(smi_info, err);
398 rv = SI_SM_CALL_WITHOUT_DELAY;
404 static void start_enable_irq(struct smi_info *smi_info)
406 unsigned char msg[2];
409 * If we are enabling interrupts, we have to tell the
412 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
413 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
415 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
416 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
419 static void start_disable_irq(struct smi_info *smi_info)
421 unsigned char msg[2];
423 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
424 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
426 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
427 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
430 static void start_clear_flags(struct smi_info *smi_info)
432 unsigned char msg[3];
434 /* Make sure the watchdog pre-timeout flag is not set at startup. */
435 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
436 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
437 msg[2] = WDT_PRE_TIMEOUT_INT;
439 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
440 smi_info->si_state = SI_CLEARING_FLAGS;
443 static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
445 smi_info->last_timeout_jiffies = jiffies;
446 mod_timer(&smi_info->si_timer, new_val);
447 smi_info->timer_running = true;
451 * When we have a situtaion where we run out of memory and cannot
452 * allocate messages, we just leave them in the BMC and run the system
453 * polled until we can allocate some memory. Once we have some
454 * memory, we will re-enable the interrupt.
456 static inline void disable_si_irq(struct smi_info *smi_info)
458 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
459 start_disable_irq(smi_info);
460 smi_info->interrupt_disabled = true;
461 if (!atomic_read(&smi_info->stop_operation))
462 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
466 static inline void enable_si_irq(struct smi_info *smi_info)
468 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
469 start_enable_irq(smi_info);
470 smi_info->interrupt_disabled = false;
474 static void handle_flags(struct smi_info *smi_info)
477 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
478 /* Watchdog pre-timeout */
479 smi_inc_stat(smi_info, watchdog_pretimeouts);
481 start_clear_flags(smi_info);
482 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
483 ipmi_smi_watchdog_pretimeout(smi_info->intf);
484 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
485 /* Messages 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_GET_MSG_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_MESSAGES;
503 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
504 /* Events available. */
505 smi_info->curr_msg = ipmi_alloc_smi_msg();
506 if (!smi_info->curr_msg) {
507 disable_si_irq(smi_info);
508 smi_info->si_state = SI_NORMAL;
511 enable_si_irq(smi_info);
513 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
514 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
515 smi_info->curr_msg->data_size = 2;
517 smi_info->handlers->start_transaction(
519 smi_info->curr_msg->data,
520 smi_info->curr_msg->data_size);
521 smi_info->si_state = SI_GETTING_EVENTS;
522 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
523 smi_info->oem_data_avail_handler) {
524 if (smi_info->oem_data_avail_handler(smi_info))
527 smi_info->si_state = SI_NORMAL;
530 static void handle_transaction_done(struct smi_info *smi_info)
532 struct ipmi_smi_msg *msg;
537 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
539 switch (smi_info->si_state) {
541 if (!smi_info->curr_msg)
544 smi_info->curr_msg->rsp_size
545 = smi_info->handlers->get_result(
547 smi_info->curr_msg->rsp,
548 IPMI_MAX_MSG_LENGTH);
551 * Do this here becase deliver_recv_msg() releases the
552 * lock, and a new message can be put in during the
553 * time the lock is released.
555 msg = smi_info->curr_msg;
556 smi_info->curr_msg = NULL;
557 deliver_recv_msg(smi_info, msg);
560 case SI_GETTING_FLAGS:
562 unsigned char msg[4];
565 /* We got the flags from the SMI, now handle them. */
566 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
568 /* Error fetching flags, just give up for now. */
569 smi_info->si_state = SI_NORMAL;
570 } else if (len < 4) {
572 * Hmm, no flags. That's technically illegal, but
573 * don't use uninitialized data.
575 smi_info->si_state = SI_NORMAL;
577 smi_info->msg_flags = msg[3];
578 handle_flags(smi_info);
583 case SI_CLEARING_FLAGS:
584 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
586 unsigned char msg[3];
588 /* We cleared the flags. */
589 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
591 /* Error clearing flags */
592 dev_warn(smi_info->dev,
593 "Error clearing flags: %2.2x\n", msg[2]);
595 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
596 start_enable_irq(smi_info);
598 smi_info->si_state = SI_NORMAL;
602 case SI_GETTING_EVENTS:
604 smi_info->curr_msg->rsp_size
605 = smi_info->handlers->get_result(
607 smi_info->curr_msg->rsp,
608 IPMI_MAX_MSG_LENGTH);
611 * Do this here becase deliver_recv_msg() releases the
612 * lock, and a new message can be put in during the
613 * time the lock is released.
615 msg = smi_info->curr_msg;
616 smi_info->curr_msg = NULL;
617 if (msg->rsp[2] != 0) {
618 /* Error getting event, probably done. */
621 /* Take off the event flag. */
622 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
623 handle_flags(smi_info);
625 smi_inc_stat(smi_info, events);
628 * Do this before we deliver the message
629 * because delivering the message releases the
630 * lock and something else can mess with the
633 handle_flags(smi_info);
635 deliver_recv_msg(smi_info, msg);
640 case SI_GETTING_MESSAGES:
642 smi_info->curr_msg->rsp_size
643 = smi_info->handlers->get_result(
645 smi_info->curr_msg->rsp,
646 IPMI_MAX_MSG_LENGTH);
649 * Do this here becase deliver_recv_msg() releases the
650 * lock, and a new message can be put in during the
651 * time the lock is released.
653 msg = smi_info->curr_msg;
654 smi_info->curr_msg = NULL;
655 if (msg->rsp[2] != 0) {
656 /* Error getting event, probably done. */
659 /* Take off the msg flag. */
660 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
661 handle_flags(smi_info);
663 smi_inc_stat(smi_info, incoming_messages);
666 * Do this before we deliver the message
667 * because delivering the message releases the
668 * lock and something else can mess with the
671 handle_flags(smi_info);
673 deliver_recv_msg(smi_info, msg);
678 case SI_ENABLE_INTERRUPTS1:
680 unsigned char msg[4];
682 /* We got the flags from the SMI, now handle them. */
683 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
685 dev_warn(smi_info->dev,
686 "Couldn't get irq info: %x.\n", msg[2]);
687 dev_warn(smi_info->dev,
688 "Maybe ok, but ipmi might run very slowly.\n");
689 smi_info->si_state = SI_NORMAL;
691 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
692 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
694 IPMI_BMC_RCV_MSG_INTR |
695 IPMI_BMC_EVT_MSG_INTR);
696 smi_info->handlers->start_transaction(
697 smi_info->si_sm, msg, 3);
698 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
703 case SI_ENABLE_INTERRUPTS2:
705 unsigned char msg[4];
707 /* We got the flags from the SMI, now handle them. */
708 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
710 dev_warn(smi_info->dev,
711 "Couldn't set irq info: %x.\n", msg[2]);
712 dev_warn(smi_info->dev,
713 "Maybe ok, but ipmi might run very slowly.\n");
715 smi_info->interrupt_disabled = false;
716 smi_info->si_state = SI_NORMAL;
720 case SI_DISABLE_INTERRUPTS1:
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"
729 smi_info->si_state = SI_NORMAL;
731 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
732 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
734 ~(IPMI_BMC_RCV_MSG_INTR |
735 IPMI_BMC_EVT_MSG_INTR));
736 smi_info->handlers->start_transaction(
737 smi_info->si_sm, msg, 3);
738 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
743 case SI_DISABLE_INTERRUPTS2:
745 unsigned char msg[4];
747 /* We got the flags from the SMI, now handle them. */
748 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
750 dev_warn(smi_info->dev, "Could not disable interrupts"
753 smi_info->si_state = SI_NORMAL;
760 * Called on timeouts and events. Timeouts should pass the elapsed
761 * time, interrupts should pass in zero. Must be called with
762 * si_lock held and interrupts disabled.
764 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
767 enum si_sm_result si_sm_result;
771 * There used to be a loop here that waited a little while
772 * (around 25us) before giving up. That turned out to be
773 * pointless, the minimum delays I was seeing were in the 300us
774 * range, which is far too long to wait in an interrupt. So
775 * we just run until the state machine tells us something
776 * happened or it needs a delay.
778 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
780 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
781 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
783 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
784 smi_inc_stat(smi_info, complete_transactions);
786 handle_transaction_done(smi_info);
787 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
788 } else if (si_sm_result == SI_SM_HOSED) {
789 smi_inc_stat(smi_info, hosed_count);
792 * Do the before return_hosed_msg, because that
795 smi_info->si_state = SI_NORMAL;
796 if (smi_info->curr_msg != NULL) {
798 * If we were handling a user message, format
799 * a response to send to the upper layer to
800 * tell it about the error.
802 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
804 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
808 * We prefer handling attn over new messages. But don't do
809 * this if there is not yet an upper layer to handle anything.
811 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
812 unsigned char msg[2];
814 smi_inc_stat(smi_info, attentions);
817 * Got a attn, send down a get message flags to see
818 * what's causing it. It would be better to handle
819 * this in the upper layer, but due to the way
820 * interrupts work with the SMI, that's not really
823 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
824 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
826 smi_info->handlers->start_transaction(
827 smi_info->si_sm, msg, 2);
828 smi_info->si_state = SI_GETTING_FLAGS;
832 /* If we are currently idle, try to start the next message. */
833 if (si_sm_result == SI_SM_IDLE) {
834 smi_inc_stat(smi_info, idles);
836 si_sm_result = start_next_msg(smi_info);
837 if (si_sm_result != SI_SM_IDLE)
841 if ((si_sm_result == SI_SM_IDLE)
842 && (atomic_read(&smi_info->req_events))) {
844 * We are idle and the upper layer requested that I fetch
847 atomic_set(&smi_info->req_events, 0);
849 smi_info->curr_msg = ipmi_alloc_smi_msg();
850 if (!smi_info->curr_msg)
853 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
854 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
855 smi_info->curr_msg->data_size = 2;
857 smi_info->handlers->start_transaction(
859 smi_info->curr_msg->data,
860 smi_info->curr_msg->data_size);
861 smi_info->si_state = SI_GETTING_EVENTS;
868 static void check_start_timer_thread(struct smi_info *smi_info)
870 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
871 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
873 if (smi_info->thread)
874 wake_up_process(smi_info->thread);
876 start_next_msg(smi_info);
877 smi_event_handler(smi_info, 0);
881 static void sender(void *send_info,
882 struct ipmi_smi_msg *msg,
885 struct smi_info *smi_info = send_info;
886 enum si_sm_result result;
892 if (atomic_read(&smi_info->stop_operation)) {
893 msg->rsp[0] = msg->data[0] | 4;
894 msg->rsp[1] = msg->data[1];
895 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
897 deliver_recv_msg(smi_info, msg);
903 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
906 if (smi_info->run_to_completion) {
908 * If we are running to completion, then throw it in
909 * the list and run transactions until everything is
910 * clear. Priority doesn't matter here.
914 * Run to completion means we are single-threaded, no
917 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
919 result = smi_event_handler(smi_info, 0);
920 while (result != SI_SM_IDLE) {
921 udelay(SI_SHORT_TIMEOUT_USEC);
922 result = smi_event_handler(smi_info,
923 SI_SHORT_TIMEOUT_USEC);
928 spin_lock_irqsave(&smi_info->si_lock, flags);
930 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
932 list_add_tail(&msg->link, &smi_info->xmit_msgs);
934 check_start_timer_thread(smi_info);
935 spin_unlock_irqrestore(&smi_info->si_lock, flags);
938 static void set_run_to_completion(void *send_info, bool i_run_to_completion)
940 struct smi_info *smi_info = send_info;
941 enum si_sm_result result;
943 smi_info->run_to_completion = i_run_to_completion;
944 if (i_run_to_completion) {
945 result = smi_event_handler(smi_info, 0);
946 while (result != SI_SM_IDLE) {
947 udelay(SI_SHORT_TIMEOUT_USEC);
948 result = smi_event_handler(smi_info,
949 SI_SHORT_TIMEOUT_USEC);
955 * Use -1 in the nsec value of the busy waiting timespec to tell that
956 * we are spinning in kipmid looking for something and not delaying
959 static inline void ipmi_si_set_not_busy(struct timespec *ts)
963 static inline int ipmi_si_is_busy(struct timespec *ts)
965 return ts->tv_nsec != -1;
968 static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
969 const struct smi_info *smi_info,
970 struct timespec *busy_until)
972 unsigned int max_busy_us = 0;
974 if (smi_info->intf_num < num_max_busy_us)
975 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
976 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
977 ipmi_si_set_not_busy(busy_until);
978 else if (!ipmi_si_is_busy(busy_until)) {
979 getnstimeofday(busy_until);
980 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
983 getnstimeofday(&now);
984 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
985 ipmi_si_set_not_busy(busy_until);
994 * A busy-waiting loop for speeding up IPMI operation.
996 * Lousy hardware makes this hard. This is only enabled for systems
997 * that are not BT and do not have interrupts. It starts spinning
998 * when an operation is complete or until max_busy tells it to stop
999 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1000 * Documentation/IPMI.txt for details.
1002 static int ipmi_thread(void *data)
1004 struct smi_info *smi_info = data;
1005 unsigned long flags;
1006 enum si_sm_result smi_result;
1007 struct timespec busy_until;
1009 ipmi_si_set_not_busy(&busy_until);
1010 set_user_nice(current, 19);
1011 while (!kthread_should_stop()) {
1014 spin_lock_irqsave(&(smi_info->si_lock), flags);
1015 smi_result = smi_event_handler(smi_info, 0);
1018 * If the driver is doing something, there is a possible
1019 * race with the timer. If the timer handler see idle,
1020 * and the thread here sees something else, the timer
1021 * handler won't restart the timer even though it is
1022 * required. So start it here if necessary.
1024 if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
1025 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
1027 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1028 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1030 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1032 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1034 else if (smi_result == SI_SM_IDLE) {
1035 if (atomic_read(&smi_info->need_watch)) {
1036 schedule_timeout_interruptible(100);
1038 /* Wait to be woken up when we are needed. */
1039 __set_current_state(TASK_INTERRUPTIBLE);
1043 schedule_timeout_interruptible(1);
1049 static void poll(void *send_info)
1051 struct smi_info *smi_info = send_info;
1052 unsigned long flags = 0;
1053 bool run_to_completion = smi_info->run_to_completion;
1056 * Make sure there is some delay in the poll loop so we can
1057 * drive time forward and timeout things.
1060 if (!run_to_completion)
1061 spin_lock_irqsave(&smi_info->si_lock, flags);
1062 smi_event_handler(smi_info, 10);
1063 if (!run_to_completion)
1064 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1067 static void request_events(void *send_info)
1069 struct smi_info *smi_info = send_info;
1071 if (atomic_read(&smi_info->stop_operation) ||
1072 !smi_info->has_event_buffer)
1075 atomic_set(&smi_info->req_events, 1);
1078 static void set_need_watch(void *send_info, bool enable)
1080 struct smi_info *smi_info = send_info;
1081 unsigned long flags;
1083 atomic_set(&smi_info->need_watch, enable);
1084 spin_lock_irqsave(&smi_info->si_lock, flags);
1085 check_start_timer_thread(smi_info);
1086 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1089 static int initialized;
1091 static void smi_timeout(unsigned long data)
1093 struct smi_info *smi_info = (struct smi_info *) data;
1094 enum si_sm_result smi_result;
1095 unsigned long flags;
1096 unsigned long jiffies_now;
1103 spin_lock_irqsave(&(smi_info->si_lock), flags);
1105 do_gettimeofday(&t);
1106 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1108 jiffies_now = jiffies;
1109 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1110 * SI_USEC_PER_JIFFY);
1111 smi_result = smi_event_handler(smi_info, time_diff);
1113 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1114 /* Running with interrupts, only do long timeouts. */
1115 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1116 smi_inc_stat(smi_info, long_timeouts);
1121 * If the state machine asks for a short delay, then shorten
1122 * the timer timeout.
1124 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1125 smi_inc_stat(smi_info, short_timeouts);
1126 timeout = jiffies + 1;
1128 smi_inc_stat(smi_info, long_timeouts);
1129 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1133 if (smi_result != SI_SM_IDLE)
1134 smi_mod_timer(smi_info, timeout);
1136 smi_info->timer_running = false;
1137 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1140 static irqreturn_t si_irq_handler(int irq, void *data)
1142 struct smi_info *smi_info = data;
1143 unsigned long flags;
1148 spin_lock_irqsave(&(smi_info->si_lock), flags);
1150 smi_inc_stat(smi_info, interrupts);
1153 do_gettimeofday(&t);
1154 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1156 smi_event_handler(smi_info, 0);
1157 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1161 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1163 struct smi_info *smi_info = data;
1164 /* We need to clear the IRQ flag for the BT interface. */
1165 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1166 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1167 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1168 return si_irq_handler(irq, data);
1171 static int smi_start_processing(void *send_info,
1174 struct smi_info *new_smi = send_info;
1177 new_smi->intf = intf;
1179 /* Try to claim any interrupts. */
1180 if (new_smi->irq_setup)
1181 new_smi->irq_setup(new_smi);
1183 /* Set up the timer that drives the interface. */
1184 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1185 smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
1188 * Check if the user forcefully enabled the daemon.
1190 if (new_smi->intf_num < num_force_kipmid)
1191 enable = force_kipmid[new_smi->intf_num];
1193 * The BT interface is efficient enough to not need a thread,
1194 * and there is no need for a thread if we have interrupts.
1196 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1200 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1201 "kipmi%d", new_smi->intf_num);
1202 if (IS_ERR(new_smi->thread)) {
1203 dev_notice(new_smi->dev, "Could not start"
1204 " kernel thread due to error %ld, only using"
1205 " timers to drive the interface\n",
1206 PTR_ERR(new_smi->thread));
1207 new_smi->thread = NULL;
1214 static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1216 struct smi_info *smi = send_info;
1218 data->addr_src = smi->addr_source;
1219 data->dev = smi->dev;
1220 data->addr_info = smi->addr_info;
1221 get_device(smi->dev);
1226 static void set_maintenance_mode(void *send_info, bool enable)
1228 struct smi_info *smi_info = send_info;
1231 atomic_set(&smi_info->req_events, 0);
1234 static struct ipmi_smi_handlers handlers = {
1235 .owner = THIS_MODULE,
1236 .start_processing = smi_start_processing,
1237 .get_smi_info = get_smi_info,
1239 .request_events = request_events,
1240 .set_need_watch = set_need_watch,
1241 .set_maintenance_mode = set_maintenance_mode,
1242 .set_run_to_completion = set_run_to_completion,
1247 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1248 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1251 static LIST_HEAD(smi_infos);
1252 static DEFINE_MUTEX(smi_infos_lock);
1253 static int smi_num; /* Used to sequence the SMIs */
1255 #define DEFAULT_REGSPACING 1
1256 #define DEFAULT_REGSIZE 1
1259 static bool si_tryacpi = 1;
1262 static bool si_trydmi = 1;
1264 static bool si_tryplatform = 1;
1266 static bool si_trypci = 1;
1268 static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
1269 static char *si_type[SI_MAX_PARMS];
1270 #define MAX_SI_TYPE_STR 30
1271 static char si_type_str[MAX_SI_TYPE_STR];
1272 static unsigned long addrs[SI_MAX_PARMS];
1273 static unsigned int num_addrs;
1274 static unsigned int ports[SI_MAX_PARMS];
1275 static unsigned int num_ports;
1276 static int irqs[SI_MAX_PARMS];
1277 static unsigned int num_irqs;
1278 static int regspacings[SI_MAX_PARMS];
1279 static unsigned int num_regspacings;
1280 static int regsizes[SI_MAX_PARMS];
1281 static unsigned int num_regsizes;
1282 static int regshifts[SI_MAX_PARMS];
1283 static unsigned int num_regshifts;
1284 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1285 static unsigned int num_slave_addrs;
1287 #define IPMI_IO_ADDR_SPACE 0
1288 #define IPMI_MEM_ADDR_SPACE 1
1289 static char *addr_space_to_str[] = { "i/o", "mem" };
1291 static int hotmod_handler(const char *val, struct kernel_param *kp);
1293 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1294 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1295 " Documentation/IPMI.txt in the kernel sources for the"
1299 module_param_named(tryacpi, si_tryacpi, bool, 0);
1300 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1301 " default scan of the interfaces identified via ACPI");
1304 module_param_named(trydmi, si_trydmi, bool, 0);
1305 MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
1306 " default scan of the interfaces identified via DMI");
1308 module_param_named(tryplatform, si_tryplatform, bool, 0);
1309 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1310 " default scan of the interfaces identified via platform"
1311 " interfaces like openfirmware");
1313 module_param_named(trypci, si_trypci, bool, 0);
1314 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1315 " default scan of the interfaces identified via pci");
1317 module_param_named(trydefaults, si_trydefaults, bool, 0);
1318 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1319 " default scan of the KCS and SMIC interface at the standard"
1321 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1322 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1323 " interface separated by commas. The types are 'kcs',"
1324 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1325 " the first interface to kcs and the second to bt");
1326 module_param_array(addrs, ulong, &num_addrs, 0);
1327 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1328 " addresses separated by commas. Only use if an interface"
1329 " is in memory. Otherwise, set it to zero or leave"
1331 module_param_array(ports, uint, &num_ports, 0);
1332 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1333 " addresses separated by commas. Only use if an interface"
1334 " is a port. Otherwise, set it to zero or leave"
1336 module_param_array(irqs, int, &num_irqs, 0);
1337 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1338 " addresses separated by commas. Only use if an interface"
1339 " has an interrupt. Otherwise, set it to zero or leave"
1341 module_param_array(regspacings, int, &num_regspacings, 0);
1342 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1343 " and each successive register used by the interface. For"
1344 " instance, if the start address is 0xca2 and the spacing"
1345 " is 2, then the second address is at 0xca4. Defaults"
1347 module_param_array(regsizes, int, &num_regsizes, 0);
1348 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1349 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1350 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1351 " the 8-bit IPMI register has to be read from a larger"
1353 module_param_array(regshifts, int, &num_regshifts, 0);
1354 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1355 " IPMI register, in bits. For instance, if the data"
1356 " is read from a 32-bit word and the IPMI data is in"
1357 " bit 8-15, then the shift would be 8");
1358 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1359 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1360 " the controller. Normally this is 0x20, but can be"
1361 " overridden by this parm. This is an array indexed"
1362 " by interface number.");
1363 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1364 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1365 " disabled(0). Normally the IPMI driver auto-detects"
1366 " this, but the value may be overridden by this parm.");
1367 module_param(unload_when_empty, bool, 0);
1368 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1369 " specified or found, default is 1. Setting to 0"
1370 " is useful for hot add of devices using hotmod.");
1371 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1372 MODULE_PARM_DESC(kipmid_max_busy_us,
1373 "Max time (in microseconds) to busy-wait for IPMI data before"
1374 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1375 " if kipmid is using up a lot of CPU time.");
1378 static void std_irq_cleanup(struct smi_info *info)
1380 if (info->si_type == SI_BT)
1381 /* Disable the interrupt in the BT interface. */
1382 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1383 free_irq(info->irq, info);
1386 static int std_irq_setup(struct smi_info *info)
1393 if (info->si_type == SI_BT) {
1394 rv = request_irq(info->irq,
1400 /* Enable the interrupt in the BT interface. */
1401 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1402 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1404 rv = request_irq(info->irq,
1410 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1411 " running polled\n",
1412 DEVICE_NAME, info->irq);
1415 info->irq_cleanup = std_irq_cleanup;
1416 dev_info(info->dev, "Using irq %d\n", info->irq);
1422 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1424 unsigned int addr = io->addr_data;
1426 return inb(addr + (offset * io->regspacing));
1429 static void port_outb(struct si_sm_io *io, unsigned int offset,
1432 unsigned int addr = io->addr_data;
1434 outb(b, addr + (offset * io->regspacing));
1437 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1439 unsigned int addr = io->addr_data;
1441 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1444 static void port_outw(struct si_sm_io *io, unsigned int offset,
1447 unsigned int addr = io->addr_data;
1449 outw(b << io->regshift, addr + (offset * io->regspacing));
1452 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1454 unsigned int addr = io->addr_data;
1456 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1459 static void port_outl(struct si_sm_io *io, unsigned int offset,
1462 unsigned int addr = io->addr_data;
1464 outl(b << io->regshift, addr+(offset * io->regspacing));
1467 static void port_cleanup(struct smi_info *info)
1469 unsigned int addr = info->io.addr_data;
1473 for (idx = 0; idx < info->io_size; idx++)
1474 release_region(addr + idx * info->io.regspacing,
1479 static int port_setup(struct smi_info *info)
1481 unsigned int addr = info->io.addr_data;
1487 info->io_cleanup = port_cleanup;
1490 * Figure out the actual inb/inw/inl/etc routine to use based
1491 * upon the register size.
1493 switch (info->io.regsize) {
1495 info->io.inputb = port_inb;
1496 info->io.outputb = port_outb;
1499 info->io.inputb = port_inw;
1500 info->io.outputb = port_outw;
1503 info->io.inputb = port_inl;
1504 info->io.outputb = port_outl;
1507 dev_warn(info->dev, "Invalid register size: %d\n",
1513 * Some BIOSes reserve disjoint I/O regions in their ACPI
1514 * tables. This causes problems when trying to register the
1515 * entire I/O region. Therefore we must register each I/O
1518 for (idx = 0; idx < info->io_size; idx++) {
1519 if (request_region(addr + idx * info->io.regspacing,
1520 info->io.regsize, DEVICE_NAME) == NULL) {
1521 /* Undo allocations */
1523 release_region(addr + idx * info->io.regspacing,
1532 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1534 return readb((io->addr)+(offset * io->regspacing));
1537 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1540 writeb(b, (io->addr)+(offset * io->regspacing));
1543 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1545 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1549 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1552 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1555 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1557 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1561 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1564 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1568 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1570 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1574 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1577 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1581 static void mem_cleanup(struct smi_info *info)
1583 unsigned long addr = info->io.addr_data;
1586 if (info->io.addr) {
1587 iounmap(info->io.addr);
1589 mapsize = ((info->io_size * info->io.regspacing)
1590 - (info->io.regspacing - info->io.regsize));
1592 release_mem_region(addr, mapsize);
1596 static int mem_setup(struct smi_info *info)
1598 unsigned long addr = info->io.addr_data;
1604 info->io_cleanup = mem_cleanup;
1607 * Figure out the actual readb/readw/readl/etc routine to use based
1608 * upon the register size.
1610 switch (info->io.regsize) {
1612 info->io.inputb = intf_mem_inb;
1613 info->io.outputb = intf_mem_outb;
1616 info->io.inputb = intf_mem_inw;
1617 info->io.outputb = intf_mem_outw;
1620 info->io.inputb = intf_mem_inl;
1621 info->io.outputb = intf_mem_outl;
1625 info->io.inputb = mem_inq;
1626 info->io.outputb = mem_outq;
1630 dev_warn(info->dev, "Invalid register size: %d\n",
1636 * Calculate the total amount of memory to claim. This is an
1637 * unusual looking calculation, but it avoids claiming any
1638 * more memory than it has to. It will claim everything
1639 * between the first address to the end of the last full
1642 mapsize = ((info->io_size * info->io.regspacing)
1643 - (info->io.regspacing - info->io.regsize));
1645 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1648 info->io.addr = ioremap(addr, mapsize);
1649 if (info->io.addr == NULL) {
1650 release_mem_region(addr, mapsize);
1657 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1658 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1666 enum hotmod_op { HM_ADD, HM_REMOVE };
1667 struct hotmod_vals {
1671 static struct hotmod_vals hotmod_ops[] = {
1673 { "remove", HM_REMOVE },
1676 static struct hotmod_vals hotmod_si[] = {
1678 { "smic", SI_SMIC },
1682 static struct hotmod_vals hotmod_as[] = {
1683 { "mem", IPMI_MEM_ADDR_SPACE },
1684 { "i/o", IPMI_IO_ADDR_SPACE },
1688 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1693 s = strchr(*curr, ',');
1695 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1700 for (i = 0; hotmod_ops[i].name; i++) {
1701 if (strcmp(*curr, v[i].name) == 0) {
1708 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1712 static int check_hotmod_int_op(const char *curr, const char *option,
1713 const char *name, int *val)
1717 if (strcmp(curr, name) == 0) {
1719 printk(KERN_WARNING PFX
1720 "No option given for '%s'\n",
1724 *val = simple_strtoul(option, &n, 0);
1725 if ((*n != '\0') || (*option == '\0')) {
1726 printk(KERN_WARNING PFX
1727 "Bad option given for '%s'\n",
1736 static struct smi_info *smi_info_alloc(void)
1738 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1741 spin_lock_init(&info->si_lock);
1745 static int hotmod_handler(const char *val, struct kernel_param *kp)
1747 char *str = kstrdup(val, GFP_KERNEL);
1749 char *next, *curr, *s, *n, *o;
1751 enum si_type si_type;
1761 struct smi_info *info;
1766 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1769 while ((ival >= 0) && isspace(str[ival])) {
1774 for (curr = str; curr; curr = next) {
1779 ipmb = 0; /* Choose the default if not specified */
1781 next = strchr(curr, ':');
1787 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1792 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1797 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1801 s = strchr(curr, ',');
1806 addr = simple_strtoul(curr, &n, 0);
1807 if ((*n != '\0') || (*curr == '\0')) {
1808 printk(KERN_WARNING PFX "Invalid hotmod address"
1815 s = strchr(curr, ',');
1820 o = strchr(curr, '=');
1825 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1830 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1835 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1840 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1845 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1852 printk(KERN_WARNING PFX
1853 "Invalid hotmod option '%s'\n",
1859 info = smi_info_alloc();
1865 info->addr_source = SI_HOTMOD;
1866 info->si_type = si_type;
1867 info->io.addr_data = addr;
1868 info->io.addr_type = addr_space;
1869 if (addr_space == IPMI_MEM_ADDR_SPACE)
1870 info->io_setup = mem_setup;
1872 info->io_setup = port_setup;
1874 info->io.addr = NULL;
1875 info->io.regspacing = regspacing;
1876 if (!info->io.regspacing)
1877 info->io.regspacing = DEFAULT_REGSPACING;
1878 info->io.regsize = regsize;
1879 if (!info->io.regsize)
1880 info->io.regsize = DEFAULT_REGSPACING;
1881 info->io.regshift = regshift;
1884 info->irq_setup = std_irq_setup;
1885 info->slave_addr = ipmb;
1892 rv = try_smi_init(info);
1894 cleanup_one_si(info);
1899 struct smi_info *e, *tmp_e;
1901 mutex_lock(&smi_infos_lock);
1902 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1903 if (e->io.addr_type != addr_space)
1905 if (e->si_type != si_type)
1907 if (e->io.addr_data == addr)
1910 mutex_unlock(&smi_infos_lock);
1919 static int hardcode_find_bmc(void)
1923 struct smi_info *info;
1925 for (i = 0; i < SI_MAX_PARMS; i++) {
1926 if (!ports[i] && !addrs[i])
1929 info = smi_info_alloc();
1933 info->addr_source = SI_HARDCODED;
1934 printk(KERN_INFO PFX "probing via hardcoded address\n");
1936 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1937 info->si_type = SI_KCS;
1938 } else if (strcmp(si_type[i], "smic") == 0) {
1939 info->si_type = SI_SMIC;
1940 } else if (strcmp(si_type[i], "bt") == 0) {
1941 info->si_type = SI_BT;
1943 printk(KERN_WARNING PFX "Interface type specified "
1944 "for interface %d, was invalid: %s\n",
1952 info->io_setup = port_setup;
1953 info->io.addr_data = ports[i];
1954 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1955 } else if (addrs[i]) {
1957 info->io_setup = mem_setup;
1958 info->io.addr_data = addrs[i];
1959 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1961 printk(KERN_WARNING PFX "Interface type specified "
1962 "for interface %d, but port and address were "
1963 "not set or set to zero.\n", i);
1968 info->io.addr = NULL;
1969 info->io.regspacing = regspacings[i];
1970 if (!info->io.regspacing)
1971 info->io.regspacing = DEFAULT_REGSPACING;
1972 info->io.regsize = regsizes[i];
1973 if (!info->io.regsize)
1974 info->io.regsize = DEFAULT_REGSPACING;
1975 info->io.regshift = regshifts[i];
1976 info->irq = irqs[i];
1978 info->irq_setup = std_irq_setup;
1979 info->slave_addr = slave_addrs[i];
1981 if (!add_smi(info)) {
1982 if (try_smi_init(info))
1983 cleanup_one_si(info);
1994 #include <linux/acpi.h>
1997 * Once we get an ACPI failure, we don't try any more, because we go
1998 * through the tables sequentially. Once we don't find a table, there
2001 static int acpi_failure;
2003 /* For GPE-type interrupts. */
2004 static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
2005 u32 gpe_number, void *context)
2007 struct smi_info *smi_info = context;
2008 unsigned long flags;
2013 spin_lock_irqsave(&(smi_info->si_lock), flags);
2015 smi_inc_stat(smi_info, interrupts);
2018 do_gettimeofday(&t);
2019 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
2021 smi_event_handler(smi_info, 0);
2022 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
2024 return ACPI_INTERRUPT_HANDLED;
2027 static void acpi_gpe_irq_cleanup(struct smi_info *info)
2032 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
2035 static int acpi_gpe_irq_setup(struct smi_info *info)
2042 /* FIXME - is level triggered right? */
2043 status = acpi_install_gpe_handler(NULL,
2045 ACPI_GPE_LEVEL_TRIGGERED,
2048 if (status != AE_OK) {
2049 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
2050 " running polled\n", DEVICE_NAME, info->irq);
2054 info->irq_cleanup = acpi_gpe_irq_cleanup;
2055 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
2062 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2073 s8 CreatorRevision[4];
2076 s16 SpecificationRevision;
2079 * Bit 0 - SCI interrupt supported
2080 * Bit 1 - I/O APIC/SAPIC
2085 * If bit 0 of InterruptType is set, then this is the SCI
2086 * interrupt in the GPEx_STS register.
2093 * If bit 1 of InterruptType is set, then this is the I/O
2094 * APIC/SAPIC interrupt.
2096 u32 GlobalSystemInterrupt;
2098 /* The actual register address. */
2099 struct acpi_generic_address addr;
2103 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2106 static int try_init_spmi(struct SPMITable *spmi)
2108 struct smi_info *info;
2111 if (spmi->IPMIlegacy != 1) {
2112 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2116 info = smi_info_alloc();
2118 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2122 info->addr_source = SI_SPMI;
2123 printk(KERN_INFO PFX "probing via SPMI\n");
2125 /* Figure out the interface type. */
2126 switch (spmi->InterfaceType) {
2128 info->si_type = SI_KCS;
2131 info->si_type = SI_SMIC;
2134 info->si_type = SI_BT;
2137 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2138 spmi->InterfaceType);
2143 if (spmi->InterruptType & 1) {
2144 /* We've got a GPE interrupt. */
2145 info->irq = spmi->GPE;
2146 info->irq_setup = acpi_gpe_irq_setup;
2147 } else if (spmi->InterruptType & 2) {
2148 /* We've got an APIC/SAPIC interrupt. */
2149 info->irq = spmi->GlobalSystemInterrupt;
2150 info->irq_setup = std_irq_setup;
2152 /* Use the default interrupt setting. */
2154 info->irq_setup = NULL;
2157 if (spmi->addr.bit_width) {
2158 /* A (hopefully) properly formed register bit width. */
2159 info->io.regspacing = spmi->addr.bit_width / 8;
2161 info->io.regspacing = DEFAULT_REGSPACING;
2163 info->io.regsize = info->io.regspacing;
2164 info->io.regshift = spmi->addr.bit_offset;
2166 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2167 info->io_setup = mem_setup;
2168 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2169 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2170 info->io_setup = port_setup;
2171 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2174 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2177 info->io.addr_data = spmi->addr.address;
2179 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2180 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2181 info->io.addr_data, info->io.regsize, info->io.regspacing,
2191 static void spmi_find_bmc(void)
2194 struct SPMITable *spmi;
2203 for (i = 0; ; i++) {
2204 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2205 (struct acpi_table_header **)&spmi);
2206 if (status != AE_OK)
2209 try_init_spmi(spmi);
2213 static int ipmi_pnp_probe(struct pnp_dev *dev,
2214 const struct pnp_device_id *dev_id)
2216 struct acpi_device *acpi_dev;
2217 struct smi_info *info;
2218 struct resource *res, *res_second;
2221 unsigned long long tmp;
2224 acpi_dev = pnp_acpi_device(dev);
2228 info = smi_info_alloc();
2232 info->addr_source = SI_ACPI;
2233 printk(KERN_INFO PFX "probing via ACPI\n");
2235 handle = acpi_dev->handle;
2236 info->addr_info.acpi_info.acpi_handle = handle;
2238 /* _IFT tells us the interface type: KCS, BT, etc */
2239 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2240 if (ACPI_FAILURE(status))
2245 info->si_type = SI_KCS;
2248 info->si_type = SI_SMIC;
2251 info->si_type = SI_BT;
2254 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2258 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2260 info->io_setup = port_setup;
2261 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2263 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2265 info->io_setup = mem_setup;
2266 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2270 dev_err(&dev->dev, "no I/O or memory address\n");
2273 info->io.addr_data = res->start;
2275 info->io.regspacing = DEFAULT_REGSPACING;
2276 res_second = pnp_get_resource(dev,
2277 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2278 IORESOURCE_IO : IORESOURCE_MEM,
2281 if (res_second->start > info->io.addr_data)
2282 info->io.regspacing = res_second->start - info->io.addr_data;
2284 info->io.regsize = DEFAULT_REGSPACING;
2285 info->io.regshift = 0;
2287 /* If _GPE exists, use it; otherwise use standard interrupts */
2288 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2289 if (ACPI_SUCCESS(status)) {
2291 info->irq_setup = acpi_gpe_irq_setup;
2292 } else if (pnp_irq_valid(dev, 0)) {
2293 info->irq = pnp_irq(dev, 0);
2294 info->irq_setup = std_irq_setup;
2297 info->dev = &dev->dev;
2298 pnp_set_drvdata(dev, info);
2300 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2301 res, info->io.regsize, info->io.regspacing,
2315 static void ipmi_pnp_remove(struct pnp_dev *dev)
2317 struct smi_info *info = pnp_get_drvdata(dev);
2319 cleanup_one_si(info);
2322 static const struct pnp_device_id pnp_dev_table[] = {
2327 static struct pnp_driver ipmi_pnp_driver = {
2328 .name = DEVICE_NAME,
2329 .probe = ipmi_pnp_probe,
2330 .remove = ipmi_pnp_remove,
2331 .id_table = pnp_dev_table,
2334 MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
2338 struct dmi_ipmi_data {
2341 unsigned long base_addr;
2347 static int decode_dmi(const struct dmi_header *dm,
2348 struct dmi_ipmi_data *dmi)
2350 const u8 *data = (const u8 *)dm;
2351 unsigned long base_addr;
2353 u8 len = dm->length;
2355 dmi->type = data[4];
2357 memcpy(&base_addr, data+8, sizeof(unsigned long));
2359 if (base_addr & 1) {
2361 base_addr &= 0xFFFE;
2362 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2365 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2367 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2369 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2371 dmi->irq = data[0x11];
2373 /* The top two bits of byte 0x10 hold the register spacing. */
2374 reg_spacing = (data[0x10] & 0xC0) >> 6;
2375 switch (reg_spacing) {
2376 case 0x00: /* Byte boundaries */
2379 case 0x01: /* 32-bit boundaries */
2382 case 0x02: /* 16-byte boundaries */
2386 /* Some other interface, just ignore it. */
2392 * Note that technically, the lower bit of the base
2393 * address should be 1 if the address is I/O and 0 if
2394 * the address is in memory. So many systems get that
2395 * wrong (and all that I have seen are I/O) so we just
2396 * ignore that bit and assume I/O. Systems that use
2397 * memory should use the newer spec, anyway.
2399 dmi->base_addr = base_addr & 0xfffe;
2400 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2404 dmi->slave_addr = data[6];
2409 static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2411 struct smi_info *info;
2413 info = smi_info_alloc();
2415 printk(KERN_ERR PFX "Could not allocate SI data\n");
2419 info->addr_source = SI_SMBIOS;
2420 printk(KERN_INFO PFX "probing via SMBIOS\n");
2422 switch (ipmi_data->type) {
2423 case 0x01: /* KCS */
2424 info->si_type = SI_KCS;
2426 case 0x02: /* SMIC */
2427 info->si_type = SI_SMIC;
2430 info->si_type = SI_BT;
2437 switch (ipmi_data->addr_space) {
2438 case IPMI_MEM_ADDR_SPACE:
2439 info->io_setup = mem_setup;
2440 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2443 case IPMI_IO_ADDR_SPACE:
2444 info->io_setup = port_setup;
2445 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2450 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2451 ipmi_data->addr_space);
2454 info->io.addr_data = ipmi_data->base_addr;
2456 info->io.regspacing = ipmi_data->offset;
2457 if (!info->io.regspacing)
2458 info->io.regspacing = DEFAULT_REGSPACING;
2459 info->io.regsize = DEFAULT_REGSPACING;
2460 info->io.regshift = 0;
2462 info->slave_addr = ipmi_data->slave_addr;
2464 info->irq = ipmi_data->irq;
2466 info->irq_setup = std_irq_setup;
2468 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2469 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2470 info->io.addr_data, info->io.regsize, info->io.regspacing,
2477 static void dmi_find_bmc(void)
2479 const struct dmi_device *dev = NULL;
2480 struct dmi_ipmi_data data;
2483 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2484 memset(&data, 0, sizeof(data));
2485 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2488 try_init_dmi(&data);
2491 #endif /* CONFIG_DMI */
2495 #define PCI_ERMC_CLASSCODE 0x0C0700
2496 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2497 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2498 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2499 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2500 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2502 #define PCI_HP_VENDOR_ID 0x103C
2503 #define PCI_MMC_DEVICE_ID 0x121A
2504 #define PCI_MMC_ADDR_CW 0x10
2506 static void ipmi_pci_cleanup(struct smi_info *info)
2508 struct pci_dev *pdev = info->addr_source_data;
2510 pci_disable_device(pdev);
2513 static int ipmi_pci_probe_regspacing(struct smi_info *info)
2515 if (info->si_type == SI_KCS) {
2516 unsigned char status;
2519 info->io.regsize = DEFAULT_REGSIZE;
2520 info->io.regshift = 0;
2522 info->handlers = &kcs_smi_handlers;
2524 /* detect 1, 4, 16byte spacing */
2525 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
2526 info->io.regspacing = regspacing;
2527 if (info->io_setup(info)) {
2529 "Could not setup I/O space\n");
2530 return DEFAULT_REGSPACING;
2532 /* write invalid cmd */
2533 info->io.outputb(&info->io, 1, 0x10);
2534 /* read status back */
2535 status = info->io.inputb(&info->io, 1);
2536 info->io_cleanup(info);
2542 return DEFAULT_REGSPACING;
2545 static int ipmi_pci_probe(struct pci_dev *pdev,
2546 const struct pci_device_id *ent)
2549 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2550 struct smi_info *info;
2552 info = smi_info_alloc();
2556 info->addr_source = SI_PCI;
2557 dev_info(&pdev->dev, "probing via PCI");
2559 switch (class_type) {
2560 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2561 info->si_type = SI_SMIC;
2564 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2565 info->si_type = SI_KCS;
2568 case PCI_ERMC_CLASSCODE_TYPE_BT:
2569 info->si_type = SI_BT;
2574 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2578 rv = pci_enable_device(pdev);
2580 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2585 info->addr_source_cleanup = ipmi_pci_cleanup;
2586 info->addr_source_data = pdev;
2588 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2589 info->io_setup = port_setup;
2590 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2592 info->io_setup = mem_setup;
2593 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2595 info->io.addr_data = pci_resource_start(pdev, 0);
2597 info->io.regspacing = ipmi_pci_probe_regspacing(info);
2598 info->io.regsize = DEFAULT_REGSIZE;
2599 info->io.regshift = 0;
2601 info->irq = pdev->irq;
2603 info->irq_setup = std_irq_setup;
2605 info->dev = &pdev->dev;
2606 pci_set_drvdata(pdev, info);
2608 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2609 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2615 pci_disable_device(pdev);
2621 static void ipmi_pci_remove(struct pci_dev *pdev)
2623 struct smi_info *info = pci_get_drvdata(pdev);
2624 cleanup_one_si(info);
2625 pci_disable_device(pdev);
2628 static struct pci_device_id ipmi_pci_devices[] = {
2629 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2630 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2633 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2635 static struct pci_driver ipmi_pci_driver = {
2636 .name = DEVICE_NAME,
2637 .id_table = ipmi_pci_devices,
2638 .probe = ipmi_pci_probe,
2639 .remove = ipmi_pci_remove,
2641 #endif /* CONFIG_PCI */
2643 static struct of_device_id ipmi_match[];
2644 static int ipmi_probe(struct platform_device *dev)
2647 const struct of_device_id *match;
2648 struct smi_info *info;
2649 struct resource resource;
2650 const __be32 *regsize, *regspacing, *regshift;
2651 struct device_node *np = dev->dev.of_node;
2655 dev_info(&dev->dev, "probing via device tree\n");
2657 match = of_match_device(ipmi_match, &dev->dev);
2661 ret = of_address_to_resource(np, 0, &resource);
2663 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2667 regsize = of_get_property(np, "reg-size", &proplen);
2668 if (regsize && proplen != 4) {
2669 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2673 regspacing = of_get_property(np, "reg-spacing", &proplen);
2674 if (regspacing && proplen != 4) {
2675 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2679 regshift = of_get_property(np, "reg-shift", &proplen);
2680 if (regshift && proplen != 4) {
2681 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2685 info = smi_info_alloc();
2689 "could not allocate memory for OF probe\n");
2693 info->si_type = (enum si_type) match->data;
2694 info->addr_source = SI_DEVICETREE;
2695 info->irq_setup = std_irq_setup;
2697 if (resource.flags & IORESOURCE_IO) {
2698 info->io_setup = port_setup;
2699 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2701 info->io_setup = mem_setup;
2702 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2705 info->io.addr_data = resource.start;
2707 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2708 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2709 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2711 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2712 info->dev = &dev->dev;
2714 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2715 info->io.addr_data, info->io.regsize, info->io.regspacing,
2718 dev_set_drvdata(&dev->dev, info);
2720 ret = add_smi(info);
2729 static int ipmi_remove(struct platform_device *dev)
2732 cleanup_one_si(dev_get_drvdata(&dev->dev));
2737 static struct of_device_id ipmi_match[] =
2739 { .type = "ipmi", .compatible = "ipmi-kcs",
2740 .data = (void *)(unsigned long) SI_KCS },
2741 { .type = "ipmi", .compatible = "ipmi-smic",
2742 .data = (void *)(unsigned long) SI_SMIC },
2743 { .type = "ipmi", .compatible = "ipmi-bt",
2744 .data = (void *)(unsigned long) SI_BT },
2748 static struct platform_driver ipmi_driver = {
2750 .name = DEVICE_NAME,
2751 .owner = THIS_MODULE,
2752 .of_match_table = ipmi_match,
2754 .probe = ipmi_probe,
2755 .remove = ipmi_remove,
2758 #ifdef CONFIG_PARISC
2759 static int ipmi_parisc_probe(struct parisc_device *dev)
2761 struct smi_info *info;
2764 info = smi_info_alloc();
2768 "could not allocate memory for PARISC probe\n");
2772 info->si_type = SI_KCS;
2773 info->addr_source = SI_DEVICETREE;
2774 info->io_setup = mem_setup;
2775 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2776 info->io.addr_data = dev->hpa.start;
2777 info->io.regsize = 1;
2778 info->io.regspacing = 1;
2779 info->io.regshift = 0;
2780 info->irq = 0; /* no interrupt */
2781 info->irq_setup = NULL;
2782 info->dev = &dev->dev;
2784 dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data);
2786 dev_set_drvdata(&dev->dev, info);
2797 static int ipmi_parisc_remove(struct parisc_device *dev)
2799 cleanup_one_si(dev_get_drvdata(&dev->dev));
2803 static struct parisc_device_id ipmi_parisc_tbl[] = {
2804 { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 },
2808 static struct parisc_driver ipmi_parisc_driver = {
2810 .id_table = ipmi_parisc_tbl,
2811 .probe = ipmi_parisc_probe,
2812 .remove = ipmi_parisc_remove,
2814 #endif /* CONFIG_PARISC */
2816 static int wait_for_msg_done(struct smi_info *smi_info)
2818 enum si_sm_result smi_result;
2820 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2822 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2823 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2824 schedule_timeout_uninterruptible(1);
2825 smi_result = smi_info->handlers->event(
2826 smi_info->si_sm, jiffies_to_usecs(1));
2827 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2828 smi_result = smi_info->handlers->event(
2829 smi_info->si_sm, 0);
2833 if (smi_result == SI_SM_HOSED)
2835 * We couldn't get the state machine to run, so whatever's at
2836 * the port is probably not an IPMI SMI interface.
2843 static int try_get_dev_id(struct smi_info *smi_info)
2845 unsigned char msg[2];
2846 unsigned char *resp;
2847 unsigned long resp_len;
2850 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2855 * Do a Get Device ID command, since it comes back with some
2858 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2859 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2860 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2862 rv = wait_for_msg_done(smi_info);
2866 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2867 resp, IPMI_MAX_MSG_LENGTH);
2869 /* Check and record info from the get device id, in case we need it. */
2870 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2877 static int try_enable_event_buffer(struct smi_info *smi_info)
2879 unsigned char msg[3];
2880 unsigned char *resp;
2881 unsigned long resp_len;
2884 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2888 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2889 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2890 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2892 rv = wait_for_msg_done(smi_info);
2894 printk(KERN_WARNING PFX "Error getting response from get"
2895 " global enables command, the event buffer is not"
2900 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2901 resp, IPMI_MAX_MSG_LENGTH);
2904 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2905 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2907 printk(KERN_WARNING PFX "Invalid return from get global"
2908 " enables command, cannot enable the event buffer.\n");
2913 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2914 /* buffer is already enabled, nothing to do. */
2917 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2918 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2919 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2920 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2922 rv = wait_for_msg_done(smi_info);
2924 printk(KERN_WARNING PFX "Error getting response from set"
2925 " global, enables command, the event buffer is not"
2930 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2931 resp, IPMI_MAX_MSG_LENGTH);
2934 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2935 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2936 printk(KERN_WARNING PFX "Invalid return from get global,"
2937 "enables command, not enable the event buffer.\n");
2944 * An error when setting the event buffer bit means
2945 * that the event buffer is not supported.
2953 static int smi_type_proc_show(struct seq_file *m, void *v)
2955 struct smi_info *smi = m->private;
2957 return seq_printf(m, "%s\n", si_to_str[smi->si_type]);
2960 static int smi_type_proc_open(struct inode *inode, struct file *file)
2962 return single_open(file, smi_type_proc_show, PDE_DATA(inode));
2965 static const struct file_operations smi_type_proc_ops = {
2966 .open = smi_type_proc_open,
2968 .llseek = seq_lseek,
2969 .release = single_release,
2972 static int smi_si_stats_proc_show(struct seq_file *m, void *v)
2974 struct smi_info *smi = m->private;
2976 seq_printf(m, "interrupts_enabled: %d\n",
2977 smi->irq && !smi->interrupt_disabled);
2978 seq_printf(m, "short_timeouts: %u\n",
2979 smi_get_stat(smi, short_timeouts));
2980 seq_printf(m, "long_timeouts: %u\n",
2981 smi_get_stat(smi, long_timeouts));
2982 seq_printf(m, "idles: %u\n",
2983 smi_get_stat(smi, idles));
2984 seq_printf(m, "interrupts: %u\n",
2985 smi_get_stat(smi, interrupts));
2986 seq_printf(m, "attentions: %u\n",
2987 smi_get_stat(smi, attentions));
2988 seq_printf(m, "flag_fetches: %u\n",
2989 smi_get_stat(smi, flag_fetches));
2990 seq_printf(m, "hosed_count: %u\n",
2991 smi_get_stat(smi, hosed_count));
2992 seq_printf(m, "complete_transactions: %u\n",
2993 smi_get_stat(smi, complete_transactions));
2994 seq_printf(m, "events: %u\n",
2995 smi_get_stat(smi, events));
2996 seq_printf(m, "watchdog_pretimeouts: %u\n",
2997 smi_get_stat(smi, watchdog_pretimeouts));
2998 seq_printf(m, "incoming_messages: %u\n",
2999 smi_get_stat(smi, incoming_messages));
3003 static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
3005 return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
3008 static const struct file_operations smi_si_stats_proc_ops = {
3009 .open = smi_si_stats_proc_open,
3011 .llseek = seq_lseek,
3012 .release = single_release,
3015 static int smi_params_proc_show(struct seq_file *m, void *v)
3017 struct smi_info *smi = m->private;
3019 return seq_printf(m,
3020 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
3021 si_to_str[smi->si_type],
3022 addr_space_to_str[smi->io.addr_type],
3031 static int smi_params_proc_open(struct inode *inode, struct file *file)
3033 return single_open(file, smi_params_proc_show, PDE_DATA(inode));
3036 static const struct file_operations smi_params_proc_ops = {
3037 .open = smi_params_proc_open,
3039 .llseek = seq_lseek,
3040 .release = single_release,
3044 * oem_data_avail_to_receive_msg_avail
3045 * @info - smi_info structure with msg_flags set
3047 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
3048 * Returns 1 indicating need to re-run handle_flags().
3050 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
3052 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
3058 * setup_dell_poweredge_oem_data_handler
3059 * @info - smi_info.device_id must be populated
3061 * Systems that match, but have firmware version < 1.40 may assert
3062 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3063 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3064 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3065 * as RECEIVE_MSG_AVAIL instead.
3067 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3068 * assert the OEM[012] bits, and if it did, the driver would have to
3069 * change to handle that properly, we don't actually check for the
3071 * Device ID = 0x20 BMC on PowerEdge 8G servers
3072 * Device Revision = 0x80
3073 * Firmware Revision1 = 0x01 BMC version 1.40
3074 * Firmware Revision2 = 0x40 BCD encoded
3075 * IPMI Version = 0x51 IPMI 1.5
3076 * Manufacturer ID = A2 02 00 Dell IANA
3078 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3079 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3082 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3083 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3084 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
3085 #define DELL_IANA_MFR_ID 0x0002a2
3086 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
3088 struct ipmi_device_id *id = &smi_info->device_id;
3089 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
3090 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
3091 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
3092 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
3093 smi_info->oem_data_avail_handler =
3094 oem_data_avail_to_receive_msg_avail;
3095 } else if (ipmi_version_major(id) < 1 ||
3096 (ipmi_version_major(id) == 1 &&
3097 ipmi_version_minor(id) < 5)) {
3098 smi_info->oem_data_avail_handler =
3099 oem_data_avail_to_receive_msg_avail;
3104 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3105 static void return_hosed_msg_badsize(struct smi_info *smi_info)
3107 struct ipmi_smi_msg *msg = smi_info->curr_msg;
3109 /* Make it a response */
3110 msg->rsp[0] = msg->data[0] | 4;
3111 msg->rsp[1] = msg->data[1];
3112 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
3114 smi_info->curr_msg = NULL;
3115 deliver_recv_msg(smi_info, msg);
3119 * dell_poweredge_bt_xaction_handler
3120 * @info - smi_info.device_id must be populated
3122 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3123 * not respond to a Get SDR command if the length of the data
3124 * requested is exactly 0x3A, which leads to command timeouts and no
3125 * data returned. This intercepts such commands, and causes userspace
3126 * callers to try again with a different-sized buffer, which succeeds.
3129 #define STORAGE_NETFN 0x0A
3130 #define STORAGE_CMD_GET_SDR 0x23
3131 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
3132 unsigned long unused,
3135 struct smi_info *smi_info = in;
3136 unsigned char *data = smi_info->curr_msg->data;
3137 unsigned int size = smi_info->curr_msg->data_size;
3139 (data[0]>>2) == STORAGE_NETFN &&
3140 data[1] == STORAGE_CMD_GET_SDR &&
3142 return_hosed_msg_badsize(smi_info);
3148 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
3149 .notifier_call = dell_poweredge_bt_xaction_handler,
3153 * setup_dell_poweredge_bt_xaction_handler
3154 * @info - smi_info.device_id must be filled in already
3156 * Fills in smi_info.device_id.start_transaction_pre_hook
3157 * when we know what function to use there.
3160 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
3162 struct ipmi_device_id *id = &smi_info->device_id;
3163 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
3164 smi_info->si_type == SI_BT)
3165 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
3169 * setup_oem_data_handler
3170 * @info - smi_info.device_id must be filled in already
3172 * Fills in smi_info.device_id.oem_data_available_handler
3173 * when we know what function to use there.
3176 static void setup_oem_data_handler(struct smi_info *smi_info)
3178 setup_dell_poweredge_oem_data_handler(smi_info);
3181 static void setup_xaction_handlers(struct smi_info *smi_info)
3183 setup_dell_poweredge_bt_xaction_handler(smi_info);
3186 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3188 if (smi_info->intf) {
3190 * The timer and thread are only running if the
3191 * interface has been started up and registered.
3193 if (smi_info->thread != NULL)
3194 kthread_stop(smi_info->thread);
3195 del_timer_sync(&smi_info->si_timer);
3199 static struct ipmi_default_vals
3205 { .type = SI_KCS, .port = 0xca2 },
3206 { .type = SI_SMIC, .port = 0xca9 },
3207 { .type = SI_BT, .port = 0xe4 },
3211 static void default_find_bmc(void)
3213 struct smi_info *info;
3216 for (i = 0; ; i++) {
3217 if (!ipmi_defaults[i].port)
3220 if (check_legacy_ioport(ipmi_defaults[i].port))
3223 info = smi_info_alloc();
3227 info->addr_source = SI_DEFAULT;
3229 info->si_type = ipmi_defaults[i].type;
3230 info->io_setup = port_setup;
3231 info->io.addr_data = ipmi_defaults[i].port;
3232 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3234 info->io.addr = NULL;
3235 info->io.regspacing = DEFAULT_REGSPACING;
3236 info->io.regsize = DEFAULT_REGSPACING;
3237 info->io.regshift = 0;
3239 if (add_smi(info) == 0) {
3240 if ((try_smi_init(info)) == 0) {
3242 printk(KERN_INFO PFX "Found default %s"
3243 " state machine at %s address 0x%lx\n",
3244 si_to_str[info->si_type],
3245 addr_space_to_str[info->io.addr_type],
3246 info->io.addr_data);
3248 cleanup_one_si(info);
3255 static int is_new_interface(struct smi_info *info)
3259 list_for_each_entry(e, &smi_infos, link) {
3260 if (e->io.addr_type != info->io.addr_type)
3262 if (e->io.addr_data == info->io.addr_data)
3269 static int add_smi(struct smi_info *new_smi)
3273 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3274 ipmi_addr_src_to_str[new_smi->addr_source],
3275 si_to_str[new_smi->si_type]);
3276 mutex_lock(&smi_infos_lock);
3277 if (!is_new_interface(new_smi)) {
3278 printk(KERN_CONT " duplicate interface\n");
3283 printk(KERN_CONT "\n");
3285 /* So we know not to free it unless we have allocated one. */
3286 new_smi->intf = NULL;
3287 new_smi->si_sm = NULL;
3288 new_smi->handlers = NULL;
3290 list_add_tail(&new_smi->link, &smi_infos);
3293 mutex_unlock(&smi_infos_lock);
3297 static int try_smi_init(struct smi_info *new_smi)
3302 printk(KERN_INFO PFX "Trying %s-specified %s state"
3303 " machine at %s address 0x%lx, slave address 0x%x,"
3305 ipmi_addr_src_to_str[new_smi->addr_source],
3306 si_to_str[new_smi->si_type],
3307 addr_space_to_str[new_smi->io.addr_type],
3308 new_smi->io.addr_data,
3309 new_smi->slave_addr, new_smi->irq);
3311 switch (new_smi->si_type) {
3313 new_smi->handlers = &kcs_smi_handlers;
3317 new_smi->handlers = &smic_smi_handlers;
3321 new_smi->handlers = &bt_smi_handlers;
3325 /* No support for anything else yet. */
3330 /* Allocate the state machine's data and initialize it. */
3331 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3332 if (!new_smi->si_sm) {
3334 "Could not allocate state machine memory\n");
3338 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3341 /* Now that we know the I/O size, we can set up the I/O. */
3342 rv = new_smi->io_setup(new_smi);
3344 printk(KERN_ERR PFX "Could not set up I/O space\n");
3348 /* Do low-level detection first. */
3349 if (new_smi->handlers->detect(new_smi->si_sm)) {
3350 if (new_smi->addr_source)
3351 printk(KERN_INFO PFX "Interface detection failed\n");
3357 * Attempt a get device id command. If it fails, we probably
3358 * don't have a BMC here.
3360 rv = try_get_dev_id(new_smi);
3362 if (new_smi->addr_source)
3363 printk(KERN_INFO PFX "There appears to be no BMC"
3364 " at this location\n");
3368 setup_oem_data_handler(new_smi);
3369 setup_xaction_handlers(new_smi);
3371 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3372 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3373 new_smi->curr_msg = NULL;
3374 atomic_set(&new_smi->req_events, 0);
3375 new_smi->run_to_completion = false;
3376 for (i = 0; i < SI_NUM_STATS; i++)
3377 atomic_set(&new_smi->stats[i], 0);
3379 new_smi->interrupt_disabled = true;
3380 atomic_set(&new_smi->stop_operation, 0);
3381 atomic_set(&new_smi->need_watch, 0);
3382 new_smi->intf_num = smi_num;
3385 rv = try_enable_event_buffer(new_smi);
3387 new_smi->has_event_buffer = true;
3390 * Start clearing the flags before we enable interrupts or the
3391 * timer to avoid racing with the timer.
3393 start_clear_flags(new_smi);
3394 /* IRQ is defined to be set when non-zero. */
3396 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3398 if (!new_smi->dev) {
3400 * If we don't already have a device from something
3401 * else (like PCI), then register a new one.
3403 new_smi->pdev = platform_device_alloc("ipmi_si",
3405 if (!new_smi->pdev) {
3407 "Unable to allocate platform device\n");
3410 new_smi->dev = &new_smi->pdev->dev;
3411 new_smi->dev->driver = &ipmi_driver.driver;
3413 rv = platform_device_add(new_smi->pdev);
3416 "Unable to register system interface device:"
3421 new_smi->dev_registered = true;
3424 rv = ipmi_register_smi(&handlers,
3426 &new_smi->device_id,
3429 new_smi->slave_addr);
3431 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3433 goto out_err_stop_timer;
3436 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3440 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3441 goto out_err_stop_timer;
3444 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3445 &smi_si_stats_proc_ops,
3448 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3449 goto out_err_stop_timer;
3452 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3453 &smi_params_proc_ops,
3456 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3457 goto out_err_stop_timer;
3460 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3461 si_to_str[new_smi->si_type]);
3466 atomic_inc(&new_smi->stop_operation);
3467 wait_for_timer_and_thread(new_smi);
3470 new_smi->interrupt_disabled = true;
3472 if (new_smi->intf) {
3473 ipmi_unregister_smi(new_smi->intf);
3474 new_smi->intf = NULL;
3477 if (new_smi->irq_cleanup) {
3478 new_smi->irq_cleanup(new_smi);
3479 new_smi->irq_cleanup = NULL;
3483 * Wait until we know that we are out of any interrupt
3484 * handlers might have been running before we freed the
3487 synchronize_sched();
3489 if (new_smi->si_sm) {
3490 if (new_smi->handlers)
3491 new_smi->handlers->cleanup(new_smi->si_sm);
3492 kfree(new_smi->si_sm);
3493 new_smi->si_sm = NULL;
3495 if (new_smi->addr_source_cleanup) {
3496 new_smi->addr_source_cleanup(new_smi);
3497 new_smi->addr_source_cleanup = NULL;
3499 if (new_smi->io_cleanup) {
3500 new_smi->io_cleanup(new_smi);
3501 new_smi->io_cleanup = NULL;
3504 if (new_smi->dev_registered) {
3505 platform_device_unregister(new_smi->pdev);
3506 new_smi->dev_registered = false;
3512 static int init_ipmi_si(void)
3518 enum ipmi_addr_src type = SI_INVALID;
3524 if (si_tryplatform) {
3525 rv = platform_driver_register(&ipmi_driver);
3527 printk(KERN_ERR PFX "Unable to register "
3528 "driver: %d\n", rv);
3533 /* Parse out the si_type string into its components. */
3536 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3538 str = strchr(str, ',');
3548 printk(KERN_INFO "IPMI System Interface driver.\n");
3550 /* If the user gave us a device, they presumably want us to use it */
3551 if (!hardcode_find_bmc())
3556 rv = pci_register_driver(&ipmi_pci_driver);
3558 printk(KERN_ERR PFX "Unable to register "
3559 "PCI driver: %d\n", rv);
3561 pci_registered = true;
3567 pnp_register_driver(&ipmi_pnp_driver);
3568 pnp_registered = true;
3582 #ifdef CONFIG_PARISC
3583 register_parisc_driver(&ipmi_parisc_driver);
3584 parisc_registered = true;
3585 /* poking PC IO addresses will crash machine, don't do it */
3589 /* We prefer devices with interrupts, but in the case of a machine
3590 with multiple BMCs we assume that there will be several instances
3591 of a given type so if we succeed in registering a type then also
3592 try to register everything else of the same type */
3594 mutex_lock(&smi_infos_lock);
3595 list_for_each_entry(e, &smi_infos, link) {
3596 /* Try to register a device if it has an IRQ and we either
3597 haven't successfully registered a device yet or this
3598 device has the same type as one we successfully registered */
3599 if (e->irq && (!type || e->addr_source == type)) {
3600 if (!try_smi_init(e)) {
3601 type = e->addr_source;
3606 /* type will only have been set if we successfully registered an si */
3608 mutex_unlock(&smi_infos_lock);
3612 /* Fall back to the preferred device */
3614 list_for_each_entry(e, &smi_infos, link) {
3615 if (!e->irq && (!type || e->addr_source == type)) {
3616 if (!try_smi_init(e)) {
3617 type = e->addr_source;
3621 mutex_unlock(&smi_infos_lock);
3626 if (si_trydefaults) {
3627 mutex_lock(&smi_infos_lock);
3628 if (list_empty(&smi_infos)) {
3629 /* No BMC was found, try defaults. */
3630 mutex_unlock(&smi_infos_lock);
3633 mutex_unlock(&smi_infos_lock);
3636 mutex_lock(&smi_infos_lock);
3637 if (unload_when_empty && list_empty(&smi_infos)) {
3638 mutex_unlock(&smi_infos_lock);
3640 printk(KERN_WARNING PFX
3641 "Unable to find any System Interface(s)\n");
3644 mutex_unlock(&smi_infos_lock);
3648 module_init(init_ipmi_si);
3650 static void cleanup_one_si(struct smi_info *to_clean)
3653 unsigned long flags;
3658 list_del(&to_clean->link);
3660 /* Tell the driver that we are shutting down. */
3661 atomic_inc(&to_clean->stop_operation);
3664 * Make sure the timer and thread are stopped and will not run
3667 wait_for_timer_and_thread(to_clean);
3670 * Timeouts are stopped, now make sure the interrupts are off
3671 * for the device. A little tricky with locks to make sure
3672 * there are no races.
3674 spin_lock_irqsave(&to_clean->si_lock, flags);
3675 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3676 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3678 schedule_timeout_uninterruptible(1);
3679 spin_lock_irqsave(&to_clean->si_lock, flags);
3681 disable_si_irq(to_clean);
3682 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3683 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3685 schedule_timeout_uninterruptible(1);
3688 /* Clean up interrupts and make sure that everything is done. */
3689 if (to_clean->irq_cleanup)
3690 to_clean->irq_cleanup(to_clean);
3691 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3693 schedule_timeout_uninterruptible(1);
3697 rv = ipmi_unregister_smi(to_clean->intf);
3700 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
3704 if (to_clean->handlers)
3705 to_clean->handlers->cleanup(to_clean->si_sm);
3707 kfree(to_clean->si_sm);
3709 if (to_clean->addr_source_cleanup)
3710 to_clean->addr_source_cleanup(to_clean);
3711 if (to_clean->io_cleanup)
3712 to_clean->io_cleanup(to_clean);
3714 if (to_clean->dev_registered)
3715 platform_device_unregister(to_clean->pdev);
3720 static void cleanup_ipmi_si(void)
3722 struct smi_info *e, *tmp_e;
3729 pci_unregister_driver(&ipmi_pci_driver);
3733 pnp_unregister_driver(&ipmi_pnp_driver);
3735 #ifdef CONFIG_PARISC
3736 if (parisc_registered)
3737 unregister_parisc_driver(&ipmi_parisc_driver);
3740 platform_driver_unregister(&ipmi_driver);
3742 mutex_lock(&smi_infos_lock);
3743 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3745 mutex_unlock(&smi_infos_lock);
3747 module_exit(cleanup_ipmi_si);
3749 MODULE_LICENSE("GPL");
3750 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3751 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3752 " system interfaces.");