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
98 /* FIXME - add watchdog stuff. */
101 /* Some BT-specific defines we need here. */
102 #define IPMI_BT_INTMASK_REG 2
103 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
104 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
107 SI_KCS, SI_SMIC, SI_BT
109 static char *si_to_str[] = { "kcs", "smic", "bt" };
111 #define DEVICE_NAME "ipmi_si"
113 static struct platform_driver ipmi_driver;
116 * Indexes into stats[] in smi_info below.
118 enum si_stat_indexes {
120 * Number of times the driver requested a timer while an operation
123 SI_STAT_short_timeouts = 0,
126 * Number of times the driver requested a timer while nothing was in
129 SI_STAT_long_timeouts,
131 /* Number of times the interface was idle while being polled. */
134 /* Number of interrupts the driver handled. */
137 /* Number of time the driver got an ATTN from the hardware. */
140 /* Number of times the driver requested flags from the hardware. */
141 SI_STAT_flag_fetches,
143 /* Number of times the hardware didn't follow the state machine. */
146 /* Number of completed messages. */
147 SI_STAT_complete_transactions,
149 /* Number of IPMI events received from the hardware. */
152 /* Number of watchdog pretimeouts. */
153 SI_STAT_watchdog_pretimeouts,
155 /* Number of asynchronous messages received. */
156 SI_STAT_incoming_messages,
159 /* This *must* remain last, add new values above this. */
166 struct si_sm_data *si_sm;
167 struct si_sm_handlers *handlers;
168 enum si_type si_type;
170 struct ipmi_smi_msg *waiting_msg;
171 struct ipmi_smi_msg *curr_msg;
172 enum si_intf_state si_state;
175 * Used to handle the various types of I/O that can occur with
179 int (*io_setup)(struct smi_info *info);
180 void (*io_cleanup)(struct smi_info *info);
181 int (*irq_setup)(struct smi_info *info);
182 void (*irq_cleanup)(struct smi_info *info);
183 unsigned int io_size;
184 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
185 void (*addr_source_cleanup)(struct smi_info *info);
186 void *addr_source_data;
189 * Per-OEM handler, called from handle_flags(). Returns 1
190 * when handle_flags() needs to be re-run or 0 indicating it
191 * set si_state itself.
193 int (*oem_data_avail_handler)(struct smi_info *smi_info);
196 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
197 * is set to hold the flags until we are done handling everything
200 #define RECEIVE_MSG_AVAIL 0x01
201 #define EVENT_MSG_BUFFER_FULL 0x02
202 #define WDT_PRE_TIMEOUT_INT 0x08
203 #define OEM0_DATA_AVAIL 0x20
204 #define OEM1_DATA_AVAIL 0x40
205 #define OEM2_DATA_AVAIL 0x80
206 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
209 unsigned char msg_flags;
211 /* Does the BMC have an event buffer? */
212 bool has_event_buffer;
215 * If set to true, this will request events the next time the
216 * state machine is idle.
221 * If true, run the state machine to completion on every send
222 * call. Generally used after a panic to make sure stuff goes
225 bool run_to_completion;
227 /* The I/O port of an SI interface. */
231 * The space between start addresses of the two ports. For
232 * instance, if the first port is 0xca2 and the spacing is 4, then
233 * the second port is 0xca6.
235 unsigned int spacing;
237 /* zero if no irq; */
240 /* The timer for this si. */
241 struct timer_list si_timer;
243 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
246 /* The time (in jiffies) the last timeout occurred at. */
247 unsigned long last_timeout_jiffies;
249 /* Are we waiting for the events, pretimeouts, received msgs? */
253 * The driver will disable interrupts when it gets into a
254 * situation where it cannot handle messages due to lack of
255 * memory. Once that situation clears up, it will re-enable
258 bool interrupt_disabled;
261 * Does the BMC support events?
263 bool supports_event_msg_buff;
266 * Did we get an attention that we did not handle?
270 /* From the get device id response... */
271 struct ipmi_device_id device_id;
273 /* Driver model stuff. */
275 struct platform_device *pdev;
278 * True if we allocated the device, false if it came from
279 * someplace else (like PCI).
283 /* Slave address, could be reported from DMI. */
284 unsigned char slave_addr;
286 /* Counters and things for the proc filesystem. */
287 atomic_t stats[SI_NUM_STATS];
289 struct task_struct *thread;
291 struct list_head link;
292 union ipmi_smi_info_union addr_info;
295 #define smi_inc_stat(smi, stat) \
296 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
297 #define smi_get_stat(smi, stat) \
298 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
300 #define SI_MAX_PARMS 4
302 static int force_kipmid[SI_MAX_PARMS];
303 static int num_force_kipmid;
305 static bool pci_registered;
308 static bool pnp_registered;
311 static bool parisc_registered;
314 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
315 static int num_max_busy_us;
317 static bool unload_when_empty = true;
319 static int add_smi(struct smi_info *smi);
320 static int try_smi_init(struct smi_info *smi);
321 static void cleanup_one_si(struct smi_info *to_clean);
322 static void cleanup_ipmi_si(void);
324 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
325 static int register_xaction_notifier(struct notifier_block *nb)
327 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
330 static void deliver_recv_msg(struct smi_info *smi_info,
331 struct ipmi_smi_msg *msg)
333 /* Deliver the message to the upper layer. */
335 ipmi_smi_msg_received(smi_info->intf, msg);
337 ipmi_free_smi_msg(msg);
340 static void return_hosed_msg(struct smi_info *smi_info, int cCode)
342 struct ipmi_smi_msg *msg = smi_info->curr_msg;
344 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
345 cCode = IPMI_ERR_UNSPECIFIED;
346 /* else use it as is */
348 /* Make it a response */
349 msg->rsp[0] = msg->data[0] | 4;
350 msg->rsp[1] = msg->data[1];
354 smi_info->curr_msg = NULL;
355 deliver_recv_msg(smi_info, msg);
358 static enum si_sm_result start_next_msg(struct smi_info *smi_info)
365 if (!smi_info->waiting_msg) {
366 smi_info->curr_msg = NULL;
371 smi_info->curr_msg = smi_info->waiting_msg;
372 smi_info->waiting_msg = NULL;
375 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
377 err = atomic_notifier_call_chain(&xaction_notifier_list,
379 if (err & NOTIFY_STOP_MASK) {
380 rv = SI_SM_CALL_WITHOUT_DELAY;
383 err = smi_info->handlers->start_transaction(
385 smi_info->curr_msg->data,
386 smi_info->curr_msg->data_size);
388 return_hosed_msg(smi_info, err);
390 rv = SI_SM_CALL_WITHOUT_DELAY;
396 static void start_check_enables(struct smi_info *smi_info)
398 unsigned char msg[2];
400 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
401 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
403 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
404 smi_info->si_state = SI_CHECKING_ENABLES;
407 static void start_clear_flags(struct smi_info *smi_info)
409 unsigned char msg[3];
411 /* Make sure the watchdog pre-timeout flag is not set at startup. */
412 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
413 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
414 msg[2] = WDT_PRE_TIMEOUT_INT;
416 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
417 smi_info->si_state = SI_CLEARING_FLAGS;
420 static void start_getting_msg_queue(struct smi_info *smi_info)
422 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
423 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
424 smi_info->curr_msg->data_size = 2;
426 smi_info->handlers->start_transaction(
428 smi_info->curr_msg->data,
429 smi_info->curr_msg->data_size);
430 smi_info->si_state = SI_GETTING_MESSAGES;
433 static void start_getting_events(struct smi_info *smi_info)
435 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
436 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
437 smi_info->curr_msg->data_size = 2;
439 smi_info->handlers->start_transaction(
441 smi_info->curr_msg->data,
442 smi_info->curr_msg->data_size);
443 smi_info->si_state = SI_GETTING_EVENTS;
446 static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
448 smi_info->last_timeout_jiffies = jiffies;
449 mod_timer(&smi_info->si_timer, new_val);
450 smi_info->timer_running = true;
454 * When we have a situtaion where we run out of memory and cannot
455 * allocate messages, we just leave them in the BMC and run the system
456 * polled until we can allocate some memory. Once we have some
457 * memory, we will re-enable the interrupt.
459 static inline bool disable_si_irq(struct smi_info *smi_info)
461 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
462 smi_info->interrupt_disabled = true;
463 start_check_enables(smi_info);
469 static inline bool enable_si_irq(struct smi_info *smi_info)
471 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
472 smi_info->interrupt_disabled = false;
473 start_check_enables(smi_info);
480 * Allocate a message. If unable to allocate, start the interrupt
481 * disable process and return NULL. If able to allocate but
482 * interrupts are disabled, free the message and return NULL after
483 * starting the interrupt enable process.
485 static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info)
487 struct ipmi_smi_msg *msg;
489 msg = ipmi_alloc_smi_msg();
491 if (!disable_si_irq(smi_info))
492 smi_info->si_state = SI_NORMAL;
493 } else if (enable_si_irq(smi_info)) {
494 ipmi_free_smi_msg(msg);
500 static void handle_flags(struct smi_info *smi_info)
503 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
504 /* Watchdog pre-timeout */
505 smi_inc_stat(smi_info, watchdog_pretimeouts);
507 start_clear_flags(smi_info);
508 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
510 ipmi_smi_watchdog_pretimeout(smi_info->intf);
511 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
512 /* Messages available. */
513 smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
514 if (!smi_info->curr_msg)
517 start_getting_msg_queue(smi_info);
518 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
519 /* Events available. */
520 smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
521 if (!smi_info->curr_msg)
524 start_getting_events(smi_info);
525 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
526 smi_info->oem_data_avail_handler) {
527 if (smi_info->oem_data_avail_handler(smi_info))
530 smi_info->si_state = SI_NORMAL;
534 * Global enables we care about.
536 #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
537 IPMI_BMC_EVT_MSG_INTR)
539 static u8 current_global_enables(struct smi_info *smi_info, u8 base,
544 if (smi_info->supports_event_msg_buff)
545 enables |= IPMI_BMC_EVT_MSG_BUFF;
547 enables &= ~IPMI_BMC_EVT_MSG_BUFF;
549 if (smi_info->irq && !smi_info->interrupt_disabled)
550 enables |= IPMI_BMC_RCV_MSG_INTR;
552 enables &= ~IPMI_BMC_RCV_MSG_INTR;
554 if (smi_info->supports_event_msg_buff &&
555 smi_info->irq && !smi_info->interrupt_disabled)
557 enables |= IPMI_BMC_EVT_MSG_INTR;
559 enables &= ~IPMI_BMC_EVT_MSG_INTR;
561 *irq_on = enables & (IPMI_BMC_EVT_MSG_INTR | IPMI_BMC_RCV_MSG_INTR);
566 static void check_bt_irq(struct smi_info *smi_info, bool irq_on)
568 u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG);
570 irqstate &= IPMI_BT_INTMASK_ENABLE_IRQ_BIT;
572 if ((bool)irqstate == irq_on)
576 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
577 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
579 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0);
582 static void handle_transaction_done(struct smi_info *smi_info)
584 struct ipmi_smi_msg *msg;
589 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
591 switch (smi_info->si_state) {
593 if (!smi_info->curr_msg)
596 smi_info->curr_msg->rsp_size
597 = smi_info->handlers->get_result(
599 smi_info->curr_msg->rsp,
600 IPMI_MAX_MSG_LENGTH);
603 * Do this here becase deliver_recv_msg() releases the
604 * lock, and a new message can be put in during the
605 * time the lock is released.
607 msg = smi_info->curr_msg;
608 smi_info->curr_msg = NULL;
609 deliver_recv_msg(smi_info, msg);
612 case SI_GETTING_FLAGS:
614 unsigned char msg[4];
617 /* We got the flags from the SMI, now handle them. */
618 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
620 /* Error fetching flags, just give up for now. */
621 smi_info->si_state = SI_NORMAL;
622 } else if (len < 4) {
624 * Hmm, no flags. That's technically illegal, but
625 * don't use uninitialized data.
627 smi_info->si_state = SI_NORMAL;
629 smi_info->msg_flags = msg[3];
630 handle_flags(smi_info);
635 case SI_CLEARING_FLAGS:
637 unsigned char msg[3];
639 /* We cleared the flags. */
640 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
642 /* Error clearing flags */
643 dev_warn(smi_info->dev,
644 "Error clearing flags: %2.2x\n", msg[2]);
646 smi_info->si_state = SI_NORMAL;
650 case SI_GETTING_EVENTS:
652 smi_info->curr_msg->rsp_size
653 = smi_info->handlers->get_result(
655 smi_info->curr_msg->rsp,
656 IPMI_MAX_MSG_LENGTH);
659 * Do this here becase deliver_recv_msg() releases the
660 * lock, and a new message can be put in during the
661 * time the lock is released.
663 msg = smi_info->curr_msg;
664 smi_info->curr_msg = NULL;
665 if (msg->rsp[2] != 0) {
666 /* Error getting event, probably done. */
669 /* Take off the event flag. */
670 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
671 handle_flags(smi_info);
673 smi_inc_stat(smi_info, events);
676 * Do this before we deliver the message
677 * because delivering the message releases the
678 * lock and something else can mess with the
681 handle_flags(smi_info);
683 deliver_recv_msg(smi_info, msg);
688 case SI_GETTING_MESSAGES:
690 smi_info->curr_msg->rsp_size
691 = smi_info->handlers->get_result(
693 smi_info->curr_msg->rsp,
694 IPMI_MAX_MSG_LENGTH);
697 * Do this here becase deliver_recv_msg() releases the
698 * lock, and a new message can be put in during the
699 * time the lock is released.
701 msg = smi_info->curr_msg;
702 smi_info->curr_msg = NULL;
703 if (msg->rsp[2] != 0) {
704 /* Error getting event, probably done. */
707 /* Take off the msg flag. */
708 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
709 handle_flags(smi_info);
711 smi_inc_stat(smi_info, incoming_messages);
714 * Do this before we deliver the message
715 * because delivering the message releases the
716 * lock and something else can mess with the
719 handle_flags(smi_info);
721 deliver_recv_msg(smi_info, msg);
726 case SI_CHECKING_ENABLES:
728 unsigned char msg[4];
732 /* We got the flags from the SMI, now handle them. */
733 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
735 dev_warn(smi_info->dev,
736 "Couldn't get irq info: %x.\n", msg[2]);
737 dev_warn(smi_info->dev,
738 "Maybe ok, but ipmi might run very slowly.\n");
739 smi_info->si_state = SI_NORMAL;
742 enables = current_global_enables(smi_info, 0, &irq_on);
743 if (smi_info->si_type == SI_BT)
744 /* BT has its own interrupt enable bit. */
745 check_bt_irq(smi_info, irq_on);
746 if (enables != (msg[3] & GLOBAL_ENABLES_MASK)) {
747 /* Enables are not correct, fix them. */
748 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
749 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
750 msg[2] = enables | (msg[3] & ~GLOBAL_ENABLES_MASK);
751 smi_info->handlers->start_transaction(
752 smi_info->si_sm, msg, 3);
753 smi_info->si_state = SI_SETTING_ENABLES;
754 } else if (smi_info->supports_event_msg_buff) {
755 smi_info->curr_msg = ipmi_alloc_smi_msg();
756 if (!smi_info->curr_msg) {
757 smi_info->si_state = SI_NORMAL;
760 start_getting_msg_queue(smi_info);
762 smi_info->si_state = SI_NORMAL;
767 case SI_SETTING_ENABLES:
769 unsigned char msg[4];
771 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
773 dev_warn(smi_info->dev,
774 "Could not set the global enables: 0x%x.\n",
777 if (smi_info->supports_event_msg_buff) {
778 smi_info->curr_msg = ipmi_alloc_smi_msg();
779 if (!smi_info->curr_msg) {
780 smi_info->si_state = SI_NORMAL;
783 start_getting_msg_queue(smi_info);
785 smi_info->si_state = SI_NORMAL;
793 * Called on timeouts and events. Timeouts should pass the elapsed
794 * time, interrupts should pass in zero. Must be called with
795 * si_lock held and interrupts disabled.
797 static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
800 enum si_sm_result si_sm_result;
804 * There used to be a loop here that waited a little while
805 * (around 25us) before giving up. That turned out to be
806 * pointless, the minimum delays I was seeing were in the 300us
807 * range, which is far too long to wait in an interrupt. So
808 * we just run until the state machine tells us something
809 * happened or it needs a delay.
811 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
813 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
814 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
816 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
817 smi_inc_stat(smi_info, complete_transactions);
819 handle_transaction_done(smi_info);
820 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
821 } else if (si_sm_result == SI_SM_HOSED) {
822 smi_inc_stat(smi_info, hosed_count);
825 * Do the before return_hosed_msg, because that
828 smi_info->si_state = SI_NORMAL;
829 if (smi_info->curr_msg != NULL) {
831 * If we were handling a user message, format
832 * a response to send to the upper layer to
833 * tell it about the error.
835 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
837 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
841 * We prefer handling attn over new messages. But don't do
842 * this if there is not yet an upper layer to handle anything.
844 if (likely(smi_info->intf) &&
845 (si_sm_result == SI_SM_ATTN || smi_info->got_attn)) {
846 unsigned char msg[2];
848 if (smi_info->si_state != SI_NORMAL) {
850 * We got an ATTN, but we are doing something else.
851 * Handle the ATTN later.
853 smi_info->got_attn = true;
855 smi_info->got_attn = false;
856 smi_inc_stat(smi_info, attentions);
859 * Got a attn, send down a get message flags to see
860 * what's causing it. It would be better to handle
861 * this in the upper layer, but due to the way
862 * interrupts work with the SMI, that's not really
865 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
866 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
868 smi_info->handlers->start_transaction(
869 smi_info->si_sm, msg, 2);
870 smi_info->si_state = SI_GETTING_FLAGS;
875 /* If we are currently idle, try to start the next message. */
876 if (si_sm_result == SI_SM_IDLE) {
877 smi_inc_stat(smi_info, idles);
879 si_sm_result = start_next_msg(smi_info);
880 if (si_sm_result != SI_SM_IDLE)
884 if ((si_sm_result == SI_SM_IDLE)
885 && (atomic_read(&smi_info->req_events))) {
887 * We are idle and the upper layer requested that I fetch
890 atomic_set(&smi_info->req_events, 0);
893 * Take this opportunity to check the interrupt and
894 * message enable state for the BMC. The BMC can be
895 * asynchronously reset, and may thus get interrupts
896 * disable and messages disabled.
898 if (smi_info->supports_event_msg_buff || smi_info->irq) {
899 start_check_enables(smi_info);
901 smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
902 if (!smi_info->curr_msg)
905 start_getting_events(smi_info);
913 static void check_start_timer_thread(struct smi_info *smi_info)
915 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
916 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
918 if (smi_info->thread)
919 wake_up_process(smi_info->thread);
921 start_next_msg(smi_info);
922 smi_event_handler(smi_info, 0);
926 static void sender(void *send_info,
927 struct ipmi_smi_msg *msg)
929 struct smi_info *smi_info = send_info;
930 enum si_sm_result result;
936 BUG_ON(smi_info->waiting_msg);
937 smi_info->waiting_msg = msg;
941 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
944 if (smi_info->run_to_completion) {
946 * If we are running to completion, start it and run
947 * transactions until everything is clear.
949 smi_info->curr_msg = smi_info->waiting_msg;
950 smi_info->waiting_msg = NULL;
953 * Run to completion means we are single-threaded, no
957 result = smi_event_handler(smi_info, 0);
958 while (result != SI_SM_IDLE) {
959 udelay(SI_SHORT_TIMEOUT_USEC);
960 result = smi_event_handler(smi_info,
961 SI_SHORT_TIMEOUT_USEC);
966 spin_lock_irqsave(&smi_info->si_lock, flags);
967 check_start_timer_thread(smi_info);
968 spin_unlock_irqrestore(&smi_info->si_lock, flags);
971 static void set_run_to_completion(void *send_info, bool i_run_to_completion)
973 struct smi_info *smi_info = send_info;
974 enum si_sm_result result;
976 smi_info->run_to_completion = i_run_to_completion;
977 if (i_run_to_completion) {
978 result = smi_event_handler(smi_info, 0);
979 while (result != SI_SM_IDLE) {
980 udelay(SI_SHORT_TIMEOUT_USEC);
981 result = smi_event_handler(smi_info,
982 SI_SHORT_TIMEOUT_USEC);
988 * Use -1 in the nsec value of the busy waiting timespec to tell that
989 * we are spinning in kipmid looking for something and not delaying
992 static inline void ipmi_si_set_not_busy(struct timespec *ts)
996 static inline int ipmi_si_is_busy(struct timespec *ts)
998 return ts->tv_nsec != -1;
1001 static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result,
1002 const struct smi_info *smi_info,
1003 struct timespec *busy_until)
1005 unsigned int max_busy_us = 0;
1007 if (smi_info->intf_num < num_max_busy_us)
1008 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
1009 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
1010 ipmi_si_set_not_busy(busy_until);
1011 else if (!ipmi_si_is_busy(busy_until)) {
1012 getnstimeofday(busy_until);
1013 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
1015 struct timespec now;
1016 getnstimeofday(&now);
1017 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
1018 ipmi_si_set_not_busy(busy_until);
1027 * A busy-waiting loop for speeding up IPMI operation.
1029 * Lousy hardware makes this hard. This is only enabled for systems
1030 * that are not BT and do not have interrupts. It starts spinning
1031 * when an operation is complete or until max_busy tells it to stop
1032 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1033 * Documentation/IPMI.txt for details.
1035 static int ipmi_thread(void *data)
1037 struct smi_info *smi_info = data;
1038 unsigned long flags;
1039 enum si_sm_result smi_result;
1040 struct timespec busy_until;
1042 ipmi_si_set_not_busy(&busy_until);
1043 set_user_nice(current, MAX_NICE);
1044 while (!kthread_should_stop()) {
1047 spin_lock_irqsave(&(smi_info->si_lock), flags);
1048 smi_result = smi_event_handler(smi_info, 0);
1051 * If the driver is doing something, there is a possible
1052 * race with the timer. If the timer handler see idle,
1053 * and the thread here sees something else, the timer
1054 * handler won't restart the timer even though it is
1055 * required. So start it here if necessary.
1057 if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
1058 smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
1060 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1061 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1063 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1065 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
1067 else if (smi_result == SI_SM_IDLE) {
1068 if (atomic_read(&smi_info->need_watch)) {
1069 schedule_timeout_interruptible(100);
1071 /* Wait to be woken up when we are needed. */
1072 __set_current_state(TASK_INTERRUPTIBLE);
1076 schedule_timeout_interruptible(1);
1082 static void poll(void *send_info)
1084 struct smi_info *smi_info = send_info;
1085 unsigned long flags = 0;
1086 bool run_to_completion = smi_info->run_to_completion;
1089 * Make sure there is some delay in the poll loop so we can
1090 * drive time forward and timeout things.
1093 if (!run_to_completion)
1094 spin_lock_irqsave(&smi_info->si_lock, flags);
1095 smi_event_handler(smi_info, 10);
1096 if (!run_to_completion)
1097 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1100 static void request_events(void *send_info)
1102 struct smi_info *smi_info = send_info;
1104 if (!smi_info->has_event_buffer)
1107 atomic_set(&smi_info->req_events, 1);
1110 static void set_need_watch(void *send_info, bool enable)
1112 struct smi_info *smi_info = send_info;
1113 unsigned long flags;
1115 atomic_set(&smi_info->need_watch, enable);
1116 spin_lock_irqsave(&smi_info->si_lock, flags);
1117 check_start_timer_thread(smi_info);
1118 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1121 static int initialized;
1123 static void smi_timeout(unsigned long data)
1125 struct smi_info *smi_info = (struct smi_info *) data;
1126 enum si_sm_result smi_result;
1127 unsigned long flags;
1128 unsigned long jiffies_now;
1135 spin_lock_irqsave(&(smi_info->si_lock), flags);
1137 do_gettimeofday(&t);
1138 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1140 jiffies_now = jiffies;
1141 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1142 * SI_USEC_PER_JIFFY);
1143 smi_result = smi_event_handler(smi_info, time_diff);
1145 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1146 /* Running with interrupts, only do long timeouts. */
1147 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1148 smi_inc_stat(smi_info, long_timeouts);
1153 * If the state machine asks for a short delay, then shorten
1154 * the timer timeout.
1156 if (smi_result == SI_SM_CALL_WITH_DELAY) {
1157 smi_inc_stat(smi_info, short_timeouts);
1158 timeout = jiffies + 1;
1160 smi_inc_stat(smi_info, long_timeouts);
1161 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1165 if (smi_result != SI_SM_IDLE)
1166 smi_mod_timer(smi_info, timeout);
1168 smi_info->timer_running = false;
1169 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1172 static irqreturn_t si_irq_handler(int irq, void *data)
1174 struct smi_info *smi_info = data;
1175 unsigned long flags;
1180 spin_lock_irqsave(&(smi_info->si_lock), flags);
1182 smi_inc_stat(smi_info, interrupts);
1185 do_gettimeofday(&t);
1186 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1188 smi_event_handler(smi_info, 0);
1189 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1193 static irqreturn_t si_bt_irq_handler(int irq, void *data)
1195 struct smi_info *smi_info = data;
1196 /* We need to clear the IRQ flag for the BT interface. */
1197 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1198 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1199 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1200 return si_irq_handler(irq, data);
1203 static int smi_start_processing(void *send_info,
1206 struct smi_info *new_smi = send_info;
1209 new_smi->intf = intf;
1211 /* Try to claim any interrupts. */
1212 if (new_smi->irq_setup)
1213 new_smi->irq_setup(new_smi);
1215 /* Set up the timer that drives the interface. */
1216 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1217 smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
1220 * Check if the user forcefully enabled the daemon.
1222 if (new_smi->intf_num < num_force_kipmid)
1223 enable = force_kipmid[new_smi->intf_num];
1225 * The BT interface is efficient enough to not need a thread,
1226 * and there is no need for a thread if we have interrupts.
1228 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
1232 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1233 "kipmi%d", new_smi->intf_num);
1234 if (IS_ERR(new_smi->thread)) {
1235 dev_notice(new_smi->dev, "Could not start"
1236 " kernel thread due to error %ld, only using"
1237 " timers to drive the interface\n",
1238 PTR_ERR(new_smi->thread));
1239 new_smi->thread = NULL;
1246 static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1248 struct smi_info *smi = send_info;
1250 data->addr_src = smi->addr_source;
1251 data->dev = smi->dev;
1252 data->addr_info = smi->addr_info;
1253 get_device(smi->dev);
1258 static void set_maintenance_mode(void *send_info, bool enable)
1260 struct smi_info *smi_info = send_info;
1263 atomic_set(&smi_info->req_events, 0);
1266 static struct ipmi_smi_handlers handlers = {
1267 .owner = THIS_MODULE,
1268 .start_processing = smi_start_processing,
1269 .get_smi_info = get_smi_info,
1271 .request_events = request_events,
1272 .set_need_watch = set_need_watch,
1273 .set_maintenance_mode = set_maintenance_mode,
1274 .set_run_to_completion = set_run_to_completion,
1279 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1280 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1283 static LIST_HEAD(smi_infos);
1284 static DEFINE_MUTEX(smi_infos_lock);
1285 static int smi_num; /* Used to sequence the SMIs */
1287 #define DEFAULT_REGSPACING 1
1288 #define DEFAULT_REGSIZE 1
1291 static bool si_tryacpi = 1;
1294 static bool si_trydmi = 1;
1296 static bool si_tryplatform = 1;
1298 static bool si_trypci = 1;
1300 static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
1301 static char *si_type[SI_MAX_PARMS];
1302 #define MAX_SI_TYPE_STR 30
1303 static char si_type_str[MAX_SI_TYPE_STR];
1304 static unsigned long addrs[SI_MAX_PARMS];
1305 static unsigned int num_addrs;
1306 static unsigned int ports[SI_MAX_PARMS];
1307 static unsigned int num_ports;
1308 static int irqs[SI_MAX_PARMS];
1309 static unsigned int num_irqs;
1310 static int regspacings[SI_MAX_PARMS];
1311 static unsigned int num_regspacings;
1312 static int regsizes[SI_MAX_PARMS];
1313 static unsigned int num_regsizes;
1314 static int regshifts[SI_MAX_PARMS];
1315 static unsigned int num_regshifts;
1316 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
1317 static unsigned int num_slave_addrs;
1319 #define IPMI_IO_ADDR_SPACE 0
1320 #define IPMI_MEM_ADDR_SPACE 1
1321 static char *addr_space_to_str[] = { "i/o", "mem" };
1323 static int hotmod_handler(const char *val, struct kernel_param *kp);
1325 module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1326 MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1327 " Documentation/IPMI.txt in the kernel sources for the"
1331 module_param_named(tryacpi, si_tryacpi, bool, 0);
1332 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1333 " default scan of the interfaces identified via ACPI");
1336 module_param_named(trydmi, si_trydmi, bool, 0);
1337 MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
1338 " default scan of the interfaces identified via DMI");
1340 module_param_named(tryplatform, si_tryplatform, bool, 0);
1341 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1342 " default scan of the interfaces identified via platform"
1343 " interfaces like openfirmware");
1345 module_param_named(trypci, si_trypci, bool, 0);
1346 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1347 " default scan of the interfaces identified via pci");
1349 module_param_named(trydefaults, si_trydefaults, bool, 0);
1350 MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1351 " default scan of the KCS and SMIC interface at the standard"
1353 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1354 MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1355 " interface separated by commas. The types are 'kcs',"
1356 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1357 " the first interface to kcs and the second to bt");
1358 module_param_array(addrs, ulong, &num_addrs, 0);
1359 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1360 " addresses separated by commas. Only use if an interface"
1361 " is in memory. Otherwise, set it to zero or leave"
1363 module_param_array(ports, uint, &num_ports, 0);
1364 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1365 " addresses separated by commas. Only use if an interface"
1366 " is a port. Otherwise, set it to zero or leave"
1368 module_param_array(irqs, int, &num_irqs, 0);
1369 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1370 " addresses separated by commas. Only use if an interface"
1371 " has an interrupt. Otherwise, set it to zero or leave"
1373 module_param_array(regspacings, int, &num_regspacings, 0);
1374 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1375 " and each successive register used by the interface. For"
1376 " instance, if the start address is 0xca2 and the spacing"
1377 " is 2, then the second address is at 0xca4. Defaults"
1379 module_param_array(regsizes, int, &num_regsizes, 0);
1380 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1381 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1382 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1383 " the 8-bit IPMI register has to be read from a larger"
1385 module_param_array(regshifts, int, &num_regshifts, 0);
1386 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1387 " IPMI register, in bits. For instance, if the data"
1388 " is read from a 32-bit word and the IPMI data is in"
1389 " bit 8-15, then the shift would be 8");
1390 module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1391 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1392 " the controller. Normally this is 0x20, but can be"
1393 " overridden by this parm. This is an array indexed"
1394 " by interface number.");
1395 module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1396 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1397 " disabled(0). Normally the IPMI driver auto-detects"
1398 " this, but the value may be overridden by this parm.");
1399 module_param(unload_when_empty, bool, 0);
1400 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1401 " specified or found, default is 1. Setting to 0"
1402 " is useful for hot add of devices using hotmod.");
1403 module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1404 MODULE_PARM_DESC(kipmid_max_busy_us,
1405 "Max time (in microseconds) to busy-wait for IPMI data before"
1406 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1407 " if kipmid is using up a lot of CPU time.");
1410 static void std_irq_cleanup(struct smi_info *info)
1412 if (info->si_type == SI_BT)
1413 /* Disable the interrupt in the BT interface. */
1414 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1415 free_irq(info->irq, info);
1418 static int std_irq_setup(struct smi_info *info)
1425 if (info->si_type == SI_BT) {
1426 rv = request_irq(info->irq,
1432 /* Enable the interrupt in the BT interface. */
1433 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1434 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1436 rv = request_irq(info->irq,
1442 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1443 " running polled\n",
1444 DEVICE_NAME, info->irq);
1447 info->irq_cleanup = std_irq_cleanup;
1448 dev_info(info->dev, "Using irq %d\n", info->irq);
1454 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1456 unsigned int addr = io->addr_data;
1458 return inb(addr + (offset * io->regspacing));
1461 static void port_outb(struct si_sm_io *io, unsigned int offset,
1464 unsigned int addr = io->addr_data;
1466 outb(b, addr + (offset * io->regspacing));
1469 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1471 unsigned int addr = io->addr_data;
1473 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1476 static void port_outw(struct si_sm_io *io, unsigned int offset,
1479 unsigned int addr = io->addr_data;
1481 outw(b << io->regshift, addr + (offset * io->regspacing));
1484 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1486 unsigned int addr = io->addr_data;
1488 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1491 static void port_outl(struct si_sm_io *io, unsigned int offset,
1494 unsigned int addr = io->addr_data;
1496 outl(b << io->regshift, addr+(offset * io->regspacing));
1499 static void port_cleanup(struct smi_info *info)
1501 unsigned int addr = info->io.addr_data;
1505 for (idx = 0; idx < info->io_size; idx++)
1506 release_region(addr + idx * info->io.regspacing,
1511 static int port_setup(struct smi_info *info)
1513 unsigned int addr = info->io.addr_data;
1519 info->io_cleanup = port_cleanup;
1522 * Figure out the actual inb/inw/inl/etc routine to use based
1523 * upon the register size.
1525 switch (info->io.regsize) {
1527 info->io.inputb = port_inb;
1528 info->io.outputb = port_outb;
1531 info->io.inputb = port_inw;
1532 info->io.outputb = port_outw;
1535 info->io.inputb = port_inl;
1536 info->io.outputb = port_outl;
1539 dev_warn(info->dev, "Invalid register size: %d\n",
1545 * Some BIOSes reserve disjoint I/O regions in their ACPI
1546 * tables. This causes problems when trying to register the
1547 * entire I/O region. Therefore we must register each I/O
1550 for (idx = 0; idx < info->io_size; idx++) {
1551 if (request_region(addr + idx * info->io.regspacing,
1552 info->io.regsize, DEVICE_NAME) == NULL) {
1553 /* Undo allocations */
1555 release_region(addr + idx * info->io.regspacing,
1564 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1566 return readb((io->addr)+(offset * io->regspacing));
1569 static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1572 writeb(b, (io->addr)+(offset * io->regspacing));
1575 static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1577 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
1581 static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1584 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1587 static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1589 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
1593 static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1596 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1600 static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1602 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
1606 static void mem_outq(struct si_sm_io *io, unsigned int offset,
1609 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1613 static void mem_cleanup(struct smi_info *info)
1615 unsigned long addr = info->io.addr_data;
1618 if (info->io.addr) {
1619 iounmap(info->io.addr);
1621 mapsize = ((info->io_size * info->io.regspacing)
1622 - (info->io.regspacing - info->io.regsize));
1624 release_mem_region(addr, mapsize);
1628 static int mem_setup(struct smi_info *info)
1630 unsigned long addr = info->io.addr_data;
1636 info->io_cleanup = mem_cleanup;
1639 * Figure out the actual readb/readw/readl/etc routine to use based
1640 * upon the register size.
1642 switch (info->io.regsize) {
1644 info->io.inputb = intf_mem_inb;
1645 info->io.outputb = intf_mem_outb;
1648 info->io.inputb = intf_mem_inw;
1649 info->io.outputb = intf_mem_outw;
1652 info->io.inputb = intf_mem_inl;
1653 info->io.outputb = intf_mem_outl;
1657 info->io.inputb = mem_inq;
1658 info->io.outputb = mem_outq;
1662 dev_warn(info->dev, "Invalid register size: %d\n",
1668 * Calculate the total amount of memory to claim. This is an
1669 * unusual looking calculation, but it avoids claiming any
1670 * more memory than it has to. It will claim everything
1671 * between the first address to the end of the last full
1674 mapsize = ((info->io_size * info->io.regspacing)
1675 - (info->io.regspacing - info->io.regsize));
1677 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1680 info->io.addr = ioremap(addr, mapsize);
1681 if (info->io.addr == NULL) {
1682 release_mem_region(addr, mapsize);
1689 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1690 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1698 enum hotmod_op { HM_ADD, HM_REMOVE };
1699 struct hotmod_vals {
1703 static struct hotmod_vals hotmod_ops[] = {
1705 { "remove", HM_REMOVE },
1708 static struct hotmod_vals hotmod_si[] = {
1710 { "smic", SI_SMIC },
1714 static struct hotmod_vals hotmod_as[] = {
1715 { "mem", IPMI_MEM_ADDR_SPACE },
1716 { "i/o", IPMI_IO_ADDR_SPACE },
1720 static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1725 s = strchr(*curr, ',');
1727 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1732 for (i = 0; v[i].name; i++) {
1733 if (strcmp(*curr, v[i].name) == 0) {
1740 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1744 static int check_hotmod_int_op(const char *curr, const char *option,
1745 const char *name, int *val)
1749 if (strcmp(curr, name) == 0) {
1751 printk(KERN_WARNING PFX
1752 "No option given for '%s'\n",
1756 *val = simple_strtoul(option, &n, 0);
1757 if ((*n != '\0') || (*option == '\0')) {
1758 printk(KERN_WARNING PFX
1759 "Bad option given for '%s'\n",
1768 static struct smi_info *smi_info_alloc(void)
1770 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1773 spin_lock_init(&info->si_lock);
1777 static int hotmod_handler(const char *val, struct kernel_param *kp)
1779 char *str = kstrdup(val, GFP_KERNEL);
1781 char *next, *curr, *s, *n, *o;
1783 enum si_type si_type;
1793 struct smi_info *info;
1798 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1801 while ((ival >= 0) && isspace(str[ival])) {
1806 for (curr = str; curr; curr = next) {
1811 ipmb = 0; /* Choose the default if not specified */
1813 next = strchr(curr, ':');
1819 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1824 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1829 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1833 s = strchr(curr, ',');
1838 addr = simple_strtoul(curr, &n, 0);
1839 if ((*n != '\0') || (*curr == '\0')) {
1840 printk(KERN_WARNING PFX "Invalid hotmod address"
1847 s = strchr(curr, ',');
1852 o = strchr(curr, '=');
1857 rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
1862 rv = check_hotmod_int_op(curr, o, "rsi", ®size);
1867 rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
1872 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1877 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1884 printk(KERN_WARNING PFX
1885 "Invalid hotmod option '%s'\n",
1891 info = smi_info_alloc();
1897 info->addr_source = SI_HOTMOD;
1898 info->si_type = si_type;
1899 info->io.addr_data = addr;
1900 info->io.addr_type = addr_space;
1901 if (addr_space == IPMI_MEM_ADDR_SPACE)
1902 info->io_setup = mem_setup;
1904 info->io_setup = port_setup;
1906 info->io.addr = NULL;
1907 info->io.regspacing = regspacing;
1908 if (!info->io.regspacing)
1909 info->io.regspacing = DEFAULT_REGSPACING;
1910 info->io.regsize = regsize;
1911 if (!info->io.regsize)
1912 info->io.regsize = DEFAULT_REGSPACING;
1913 info->io.regshift = regshift;
1916 info->irq_setup = std_irq_setup;
1917 info->slave_addr = ipmb;
1924 rv = try_smi_init(info);
1926 cleanup_one_si(info);
1931 struct smi_info *e, *tmp_e;
1933 mutex_lock(&smi_infos_lock);
1934 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1935 if (e->io.addr_type != addr_space)
1937 if (e->si_type != si_type)
1939 if (e->io.addr_data == addr)
1942 mutex_unlock(&smi_infos_lock);
1951 static int hardcode_find_bmc(void)
1955 struct smi_info *info;
1957 for (i = 0; i < SI_MAX_PARMS; i++) {
1958 if (!ports[i] && !addrs[i])
1961 info = smi_info_alloc();
1965 info->addr_source = SI_HARDCODED;
1966 printk(KERN_INFO PFX "probing via hardcoded address\n");
1968 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
1969 info->si_type = SI_KCS;
1970 } else if (strcmp(si_type[i], "smic") == 0) {
1971 info->si_type = SI_SMIC;
1972 } else if (strcmp(si_type[i], "bt") == 0) {
1973 info->si_type = SI_BT;
1975 printk(KERN_WARNING PFX "Interface type specified "
1976 "for interface %d, was invalid: %s\n",
1984 info->io_setup = port_setup;
1985 info->io.addr_data = ports[i];
1986 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1987 } else if (addrs[i]) {
1989 info->io_setup = mem_setup;
1990 info->io.addr_data = addrs[i];
1991 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1993 printk(KERN_WARNING PFX "Interface type specified "
1994 "for interface %d, but port and address were "
1995 "not set or set to zero.\n", i);
2000 info->io.addr = NULL;
2001 info->io.regspacing = regspacings[i];
2002 if (!info->io.regspacing)
2003 info->io.regspacing = DEFAULT_REGSPACING;
2004 info->io.regsize = regsizes[i];
2005 if (!info->io.regsize)
2006 info->io.regsize = DEFAULT_REGSPACING;
2007 info->io.regshift = regshifts[i];
2008 info->irq = irqs[i];
2010 info->irq_setup = std_irq_setup;
2011 info->slave_addr = slave_addrs[i];
2013 if (!add_smi(info)) {
2014 if (try_smi_init(info))
2015 cleanup_one_si(info);
2026 #include <linux/acpi.h>
2029 * Once we get an ACPI failure, we don't try any more, because we go
2030 * through the tables sequentially. Once we don't find a table, there
2033 static int acpi_failure;
2035 /* For GPE-type interrupts. */
2036 static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
2037 u32 gpe_number, void *context)
2039 struct smi_info *smi_info = context;
2040 unsigned long flags;
2045 spin_lock_irqsave(&(smi_info->si_lock), flags);
2047 smi_inc_stat(smi_info, interrupts);
2050 do_gettimeofday(&t);
2051 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
2053 smi_event_handler(smi_info, 0);
2054 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
2056 return ACPI_INTERRUPT_HANDLED;
2059 static void acpi_gpe_irq_cleanup(struct smi_info *info)
2064 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
2067 static int acpi_gpe_irq_setup(struct smi_info *info)
2074 /* FIXME - is level triggered right? */
2075 status = acpi_install_gpe_handler(NULL,
2077 ACPI_GPE_LEVEL_TRIGGERED,
2080 if (status != AE_OK) {
2081 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
2082 " running polled\n", DEVICE_NAME, info->irq);
2086 info->irq_cleanup = acpi_gpe_irq_cleanup;
2087 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
2094 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2105 s8 CreatorRevision[4];
2108 s16 SpecificationRevision;
2111 * Bit 0 - SCI interrupt supported
2112 * Bit 1 - I/O APIC/SAPIC
2117 * If bit 0 of InterruptType is set, then this is the SCI
2118 * interrupt in the GPEx_STS register.
2125 * If bit 1 of InterruptType is set, then this is the I/O
2126 * APIC/SAPIC interrupt.
2128 u32 GlobalSystemInterrupt;
2130 /* The actual register address. */
2131 struct acpi_generic_address addr;
2135 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2138 static int try_init_spmi(struct SPMITable *spmi)
2140 struct smi_info *info;
2143 if (spmi->IPMIlegacy != 1) {
2144 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2148 info = smi_info_alloc();
2150 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
2154 info->addr_source = SI_SPMI;
2155 printk(KERN_INFO PFX "probing via SPMI\n");
2157 /* Figure out the interface type. */
2158 switch (spmi->InterfaceType) {
2160 info->si_type = SI_KCS;
2163 info->si_type = SI_SMIC;
2166 info->si_type = SI_BT;
2168 case 4: /* SSIF, just ignore */
2172 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2173 spmi->InterfaceType);
2178 if (spmi->InterruptType & 1) {
2179 /* We've got a GPE interrupt. */
2180 info->irq = spmi->GPE;
2181 info->irq_setup = acpi_gpe_irq_setup;
2182 } else if (spmi->InterruptType & 2) {
2183 /* We've got an APIC/SAPIC interrupt. */
2184 info->irq = spmi->GlobalSystemInterrupt;
2185 info->irq_setup = std_irq_setup;
2187 /* Use the default interrupt setting. */
2189 info->irq_setup = NULL;
2192 if (spmi->addr.bit_width) {
2193 /* A (hopefully) properly formed register bit width. */
2194 info->io.regspacing = spmi->addr.bit_width / 8;
2196 info->io.regspacing = DEFAULT_REGSPACING;
2198 info->io.regsize = info->io.regspacing;
2199 info->io.regshift = spmi->addr.bit_offset;
2201 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
2202 info->io_setup = mem_setup;
2203 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2204 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
2205 info->io_setup = port_setup;
2206 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2209 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
2212 info->io.addr_data = spmi->addr.address;
2214 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2215 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2216 info->io.addr_data, info->io.regsize, info->io.regspacing,
2226 static void spmi_find_bmc(void)
2229 struct SPMITable *spmi;
2238 for (i = 0; ; i++) {
2239 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2240 (struct acpi_table_header **)&spmi);
2241 if (status != AE_OK)
2244 try_init_spmi(spmi);
2248 static int ipmi_pnp_probe(struct pnp_dev *dev,
2249 const struct pnp_device_id *dev_id)
2251 struct acpi_device *acpi_dev;
2252 struct smi_info *info;
2253 struct resource *res, *res_second;
2256 unsigned long long tmp;
2259 acpi_dev = pnp_acpi_device(dev);
2263 info = smi_info_alloc();
2267 info->addr_source = SI_ACPI;
2268 printk(KERN_INFO PFX "probing via ACPI\n");
2270 handle = acpi_dev->handle;
2271 info->addr_info.acpi_info.acpi_handle = handle;
2273 /* _IFT tells us the interface type: KCS, BT, etc */
2274 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2275 if (ACPI_FAILURE(status))
2280 info->si_type = SI_KCS;
2283 info->si_type = SI_SMIC;
2286 info->si_type = SI_BT;
2288 case 4: /* SSIF, just ignore */
2291 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
2295 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2297 info->io_setup = port_setup;
2298 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2300 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2302 info->io_setup = mem_setup;
2303 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2307 dev_err(&dev->dev, "no I/O or memory address\n");
2310 info->io.addr_data = res->start;
2312 info->io.regspacing = DEFAULT_REGSPACING;
2313 res_second = pnp_get_resource(dev,
2314 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2315 IORESOURCE_IO : IORESOURCE_MEM,
2318 if (res_second->start > info->io.addr_data)
2319 info->io.regspacing = res_second->start - info->io.addr_data;
2321 info->io.regsize = DEFAULT_REGSPACING;
2322 info->io.regshift = 0;
2324 /* If _GPE exists, use it; otherwise use standard interrupts */
2325 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2326 if (ACPI_SUCCESS(status)) {
2328 info->irq_setup = acpi_gpe_irq_setup;
2329 } else if (pnp_irq_valid(dev, 0)) {
2330 info->irq = pnp_irq(dev, 0);
2331 info->irq_setup = std_irq_setup;
2334 info->dev = &dev->dev;
2335 pnp_set_drvdata(dev, info);
2337 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2338 res, info->io.regsize, info->io.regspacing,
2352 static void ipmi_pnp_remove(struct pnp_dev *dev)
2354 struct smi_info *info = pnp_get_drvdata(dev);
2356 cleanup_one_si(info);
2359 static const struct pnp_device_id pnp_dev_table[] = {
2364 static struct pnp_driver ipmi_pnp_driver = {
2365 .name = DEVICE_NAME,
2366 .probe = ipmi_pnp_probe,
2367 .remove = ipmi_pnp_remove,
2368 .id_table = pnp_dev_table,
2371 MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
2375 struct dmi_ipmi_data {
2378 unsigned long base_addr;
2384 static int decode_dmi(const struct dmi_header *dm,
2385 struct dmi_ipmi_data *dmi)
2387 const u8 *data = (const u8 *)dm;
2388 unsigned long base_addr;
2390 u8 len = dm->length;
2392 dmi->type = data[4];
2394 memcpy(&base_addr, data+8, sizeof(unsigned long));
2396 if (base_addr & 1) {
2398 base_addr &= 0xFFFE;
2399 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2402 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
2404 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2406 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
2408 dmi->irq = data[0x11];
2410 /* The top two bits of byte 0x10 hold the register spacing. */
2411 reg_spacing = (data[0x10] & 0xC0) >> 6;
2412 switch (reg_spacing) {
2413 case 0x00: /* Byte boundaries */
2416 case 0x01: /* 32-bit boundaries */
2419 case 0x02: /* 16-byte boundaries */
2423 /* Some other interface, just ignore it. */
2429 * Note that technically, the lower bit of the base
2430 * address should be 1 if the address is I/O and 0 if
2431 * the address is in memory. So many systems get that
2432 * wrong (and all that I have seen are I/O) so we just
2433 * ignore that bit and assume I/O. Systems that use
2434 * memory should use the newer spec, anyway.
2436 dmi->base_addr = base_addr & 0xfffe;
2437 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2441 dmi->slave_addr = data[6];
2446 static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
2448 struct smi_info *info;
2450 info = smi_info_alloc();
2452 printk(KERN_ERR PFX "Could not allocate SI data\n");
2456 info->addr_source = SI_SMBIOS;
2457 printk(KERN_INFO PFX "probing via SMBIOS\n");
2459 switch (ipmi_data->type) {
2460 case 0x01: /* KCS */
2461 info->si_type = SI_KCS;
2463 case 0x02: /* SMIC */
2464 info->si_type = SI_SMIC;
2467 info->si_type = SI_BT;
2474 switch (ipmi_data->addr_space) {
2475 case IPMI_MEM_ADDR_SPACE:
2476 info->io_setup = mem_setup;
2477 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2480 case IPMI_IO_ADDR_SPACE:
2481 info->io_setup = port_setup;
2482 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2487 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
2488 ipmi_data->addr_space);
2491 info->io.addr_data = ipmi_data->base_addr;
2493 info->io.regspacing = ipmi_data->offset;
2494 if (!info->io.regspacing)
2495 info->io.regspacing = DEFAULT_REGSPACING;
2496 info->io.regsize = DEFAULT_REGSPACING;
2497 info->io.regshift = 0;
2499 info->slave_addr = ipmi_data->slave_addr;
2501 info->irq = ipmi_data->irq;
2503 info->irq_setup = std_irq_setup;
2505 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2506 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2507 info->io.addr_data, info->io.regsize, info->io.regspacing,
2514 static void dmi_find_bmc(void)
2516 const struct dmi_device *dev = NULL;
2517 struct dmi_ipmi_data data;
2520 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
2521 memset(&data, 0, sizeof(data));
2522 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2525 try_init_dmi(&data);
2528 #endif /* CONFIG_DMI */
2532 #define PCI_ERMC_CLASSCODE 0x0C0700
2533 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2534 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2535 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2536 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2537 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2539 #define PCI_HP_VENDOR_ID 0x103C
2540 #define PCI_MMC_DEVICE_ID 0x121A
2541 #define PCI_MMC_ADDR_CW 0x10
2543 static void ipmi_pci_cleanup(struct smi_info *info)
2545 struct pci_dev *pdev = info->addr_source_data;
2547 pci_disable_device(pdev);
2550 static int ipmi_pci_probe_regspacing(struct smi_info *info)
2552 if (info->si_type == SI_KCS) {
2553 unsigned char status;
2556 info->io.regsize = DEFAULT_REGSIZE;
2557 info->io.regshift = 0;
2559 info->handlers = &kcs_smi_handlers;
2561 /* detect 1, 4, 16byte spacing */
2562 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
2563 info->io.regspacing = regspacing;
2564 if (info->io_setup(info)) {
2566 "Could not setup I/O space\n");
2567 return DEFAULT_REGSPACING;
2569 /* write invalid cmd */
2570 info->io.outputb(&info->io, 1, 0x10);
2571 /* read status back */
2572 status = info->io.inputb(&info->io, 1);
2573 info->io_cleanup(info);
2579 return DEFAULT_REGSPACING;
2582 static int ipmi_pci_probe(struct pci_dev *pdev,
2583 const struct pci_device_id *ent)
2586 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2587 struct smi_info *info;
2589 info = smi_info_alloc();
2593 info->addr_source = SI_PCI;
2594 dev_info(&pdev->dev, "probing via PCI");
2596 switch (class_type) {
2597 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2598 info->si_type = SI_SMIC;
2601 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2602 info->si_type = SI_KCS;
2605 case PCI_ERMC_CLASSCODE_TYPE_BT:
2606 info->si_type = SI_BT;
2611 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
2615 rv = pci_enable_device(pdev);
2617 dev_err(&pdev->dev, "couldn't enable PCI device\n");
2622 info->addr_source_cleanup = ipmi_pci_cleanup;
2623 info->addr_source_data = pdev;
2625 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2626 info->io_setup = port_setup;
2627 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2629 info->io_setup = mem_setup;
2630 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2632 info->io.addr_data = pci_resource_start(pdev, 0);
2634 info->io.regspacing = ipmi_pci_probe_regspacing(info);
2635 info->io.regsize = DEFAULT_REGSIZE;
2636 info->io.regshift = 0;
2638 info->irq = pdev->irq;
2640 info->irq_setup = std_irq_setup;
2642 info->dev = &pdev->dev;
2643 pci_set_drvdata(pdev, info);
2645 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2646 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2652 pci_disable_device(pdev);
2658 static void ipmi_pci_remove(struct pci_dev *pdev)
2660 struct smi_info *info = pci_get_drvdata(pdev);
2661 cleanup_one_si(info);
2662 pci_disable_device(pdev);
2665 static struct pci_device_id ipmi_pci_devices[] = {
2666 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
2667 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2670 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2672 static struct pci_driver ipmi_pci_driver = {
2673 .name = DEVICE_NAME,
2674 .id_table = ipmi_pci_devices,
2675 .probe = ipmi_pci_probe,
2676 .remove = ipmi_pci_remove,
2678 #endif /* CONFIG_PCI */
2680 static struct of_device_id ipmi_match[];
2681 static int ipmi_probe(struct platform_device *dev)
2684 const struct of_device_id *match;
2685 struct smi_info *info;
2686 struct resource resource;
2687 const __be32 *regsize, *regspacing, *regshift;
2688 struct device_node *np = dev->dev.of_node;
2692 dev_info(&dev->dev, "probing via device tree\n");
2694 match = of_match_device(ipmi_match, &dev->dev);
2698 if (!of_device_is_available(np))
2701 ret = of_address_to_resource(np, 0, &resource);
2703 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2707 regsize = of_get_property(np, "reg-size", &proplen);
2708 if (regsize && proplen != 4) {
2709 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2713 regspacing = of_get_property(np, "reg-spacing", &proplen);
2714 if (regspacing && proplen != 4) {
2715 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2719 regshift = of_get_property(np, "reg-shift", &proplen);
2720 if (regshift && proplen != 4) {
2721 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2725 info = smi_info_alloc();
2729 "could not allocate memory for OF probe\n");
2733 info->si_type = (enum si_type) match->data;
2734 info->addr_source = SI_DEVICETREE;
2735 info->irq_setup = std_irq_setup;
2737 if (resource.flags & IORESOURCE_IO) {
2738 info->io_setup = port_setup;
2739 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2741 info->io_setup = mem_setup;
2742 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2745 info->io.addr_data = resource.start;
2747 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2748 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2749 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
2751 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
2752 info->dev = &dev->dev;
2754 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
2755 info->io.addr_data, info->io.regsize, info->io.regspacing,
2758 dev_set_drvdata(&dev->dev, info);
2760 ret = add_smi(info);
2769 static int ipmi_remove(struct platform_device *dev)
2772 cleanup_one_si(dev_get_drvdata(&dev->dev));
2777 static struct of_device_id ipmi_match[] =
2779 { .type = "ipmi", .compatible = "ipmi-kcs",
2780 .data = (void *)(unsigned long) SI_KCS },
2781 { .type = "ipmi", .compatible = "ipmi-smic",
2782 .data = (void *)(unsigned long) SI_SMIC },
2783 { .type = "ipmi", .compatible = "ipmi-bt",
2784 .data = (void *)(unsigned long) SI_BT },
2788 static struct platform_driver ipmi_driver = {
2790 .name = DEVICE_NAME,
2791 .owner = THIS_MODULE,
2792 .of_match_table = ipmi_match,
2794 .probe = ipmi_probe,
2795 .remove = ipmi_remove,
2798 #ifdef CONFIG_PARISC
2799 static int ipmi_parisc_probe(struct parisc_device *dev)
2801 struct smi_info *info;
2804 info = smi_info_alloc();
2808 "could not allocate memory for PARISC probe\n");
2812 info->si_type = SI_KCS;
2813 info->addr_source = SI_DEVICETREE;
2814 info->io_setup = mem_setup;
2815 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2816 info->io.addr_data = dev->hpa.start;
2817 info->io.regsize = 1;
2818 info->io.regspacing = 1;
2819 info->io.regshift = 0;
2820 info->irq = 0; /* no interrupt */
2821 info->irq_setup = NULL;
2822 info->dev = &dev->dev;
2824 dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data);
2826 dev_set_drvdata(&dev->dev, info);
2837 static int ipmi_parisc_remove(struct parisc_device *dev)
2839 cleanup_one_si(dev_get_drvdata(&dev->dev));
2843 static struct parisc_device_id ipmi_parisc_tbl[] = {
2844 { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 },
2848 static struct parisc_driver ipmi_parisc_driver = {
2850 .id_table = ipmi_parisc_tbl,
2851 .probe = ipmi_parisc_probe,
2852 .remove = ipmi_parisc_remove,
2854 #endif /* CONFIG_PARISC */
2856 static int wait_for_msg_done(struct smi_info *smi_info)
2858 enum si_sm_result smi_result;
2860 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
2862 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2863 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
2864 schedule_timeout_uninterruptible(1);
2865 smi_result = smi_info->handlers->event(
2866 smi_info->si_sm, jiffies_to_usecs(1));
2867 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
2868 smi_result = smi_info->handlers->event(
2869 smi_info->si_sm, 0);
2873 if (smi_result == SI_SM_HOSED)
2875 * We couldn't get the state machine to run, so whatever's at
2876 * the port is probably not an IPMI SMI interface.
2883 static int try_get_dev_id(struct smi_info *smi_info)
2885 unsigned char msg[2];
2886 unsigned char *resp;
2887 unsigned long resp_len;
2890 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2895 * Do a Get Device ID command, since it comes back with some
2898 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2899 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2900 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2902 rv = wait_for_msg_done(smi_info);
2906 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2907 resp, IPMI_MAX_MSG_LENGTH);
2909 /* Check and record info from the get device id, in case we need it. */
2910 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
2917 static int try_enable_event_buffer(struct smi_info *smi_info)
2919 unsigned char msg[3];
2920 unsigned char *resp;
2921 unsigned long resp_len;
2924 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2928 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2929 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2930 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2932 rv = wait_for_msg_done(smi_info);
2934 printk(KERN_WARNING PFX "Error getting response from get"
2935 " global enables command, the event buffer is not"
2940 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2941 resp, IPMI_MAX_MSG_LENGTH);
2944 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2945 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2947 printk(KERN_WARNING PFX "Invalid return from get global"
2948 " enables command, cannot enable the event buffer.\n");
2953 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) {
2954 /* buffer is already enabled, nothing to do. */
2955 smi_info->supports_event_msg_buff = true;
2959 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2960 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2961 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2962 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2964 rv = wait_for_msg_done(smi_info);
2966 printk(KERN_WARNING PFX "Error getting response from set"
2967 " global, enables command, the event buffer is not"
2972 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2973 resp, IPMI_MAX_MSG_LENGTH);
2976 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2977 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2978 printk(KERN_WARNING PFX "Invalid return from get global,"
2979 "enables command, not enable the event buffer.\n");
2986 * An error when setting the event buffer bit means
2987 * that the event buffer is not supported.
2991 smi_info->supports_event_msg_buff = true;
2998 static int smi_type_proc_show(struct seq_file *m, void *v)
3000 struct smi_info *smi = m->private;
3002 return seq_printf(m, "%s\n", si_to_str[smi->si_type]);
3005 static int smi_type_proc_open(struct inode *inode, struct file *file)
3007 return single_open(file, smi_type_proc_show, PDE_DATA(inode));
3010 static const struct file_operations smi_type_proc_ops = {
3011 .open = smi_type_proc_open,
3013 .llseek = seq_lseek,
3014 .release = single_release,
3017 static int smi_si_stats_proc_show(struct seq_file *m, void *v)
3019 struct smi_info *smi = m->private;
3021 seq_printf(m, "interrupts_enabled: %d\n",
3022 smi->irq && !smi->interrupt_disabled);
3023 seq_printf(m, "short_timeouts: %u\n",
3024 smi_get_stat(smi, short_timeouts));
3025 seq_printf(m, "long_timeouts: %u\n",
3026 smi_get_stat(smi, long_timeouts));
3027 seq_printf(m, "idles: %u\n",
3028 smi_get_stat(smi, idles));
3029 seq_printf(m, "interrupts: %u\n",
3030 smi_get_stat(smi, interrupts));
3031 seq_printf(m, "attentions: %u\n",
3032 smi_get_stat(smi, attentions));
3033 seq_printf(m, "flag_fetches: %u\n",
3034 smi_get_stat(smi, flag_fetches));
3035 seq_printf(m, "hosed_count: %u\n",
3036 smi_get_stat(smi, hosed_count));
3037 seq_printf(m, "complete_transactions: %u\n",
3038 smi_get_stat(smi, complete_transactions));
3039 seq_printf(m, "events: %u\n",
3040 smi_get_stat(smi, events));
3041 seq_printf(m, "watchdog_pretimeouts: %u\n",
3042 smi_get_stat(smi, watchdog_pretimeouts));
3043 seq_printf(m, "incoming_messages: %u\n",
3044 smi_get_stat(smi, incoming_messages));
3048 static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
3050 return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
3053 static const struct file_operations smi_si_stats_proc_ops = {
3054 .open = smi_si_stats_proc_open,
3056 .llseek = seq_lseek,
3057 .release = single_release,
3060 static int smi_params_proc_show(struct seq_file *m, void *v)
3062 struct smi_info *smi = m->private;
3064 return seq_printf(m,
3065 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
3066 si_to_str[smi->si_type],
3067 addr_space_to_str[smi->io.addr_type],
3076 static int smi_params_proc_open(struct inode *inode, struct file *file)
3078 return single_open(file, smi_params_proc_show, PDE_DATA(inode));
3081 static const struct file_operations smi_params_proc_ops = {
3082 .open = smi_params_proc_open,
3084 .llseek = seq_lseek,
3085 .release = single_release,
3089 * oem_data_avail_to_receive_msg_avail
3090 * @info - smi_info structure with msg_flags set
3092 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
3093 * Returns 1 indicating need to re-run handle_flags().
3095 static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
3097 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
3103 * setup_dell_poweredge_oem_data_handler
3104 * @info - smi_info.device_id must be populated
3106 * Systems that match, but have firmware version < 1.40 may assert
3107 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3108 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3109 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3110 * as RECEIVE_MSG_AVAIL instead.
3112 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3113 * assert the OEM[012] bits, and if it did, the driver would have to
3114 * change to handle that properly, we don't actually check for the
3116 * Device ID = 0x20 BMC on PowerEdge 8G servers
3117 * Device Revision = 0x80
3118 * Firmware Revision1 = 0x01 BMC version 1.40
3119 * Firmware Revision2 = 0x40 BCD encoded
3120 * IPMI Version = 0x51 IPMI 1.5
3121 * Manufacturer ID = A2 02 00 Dell IANA
3123 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3124 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3127 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3128 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3129 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
3130 #define DELL_IANA_MFR_ID 0x0002a2
3131 static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
3133 struct ipmi_device_id *id = &smi_info->device_id;
3134 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
3135 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
3136 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
3137 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
3138 smi_info->oem_data_avail_handler =
3139 oem_data_avail_to_receive_msg_avail;
3140 } else if (ipmi_version_major(id) < 1 ||
3141 (ipmi_version_major(id) == 1 &&
3142 ipmi_version_minor(id) < 5)) {
3143 smi_info->oem_data_avail_handler =
3144 oem_data_avail_to_receive_msg_avail;
3149 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3150 static void return_hosed_msg_badsize(struct smi_info *smi_info)
3152 struct ipmi_smi_msg *msg = smi_info->curr_msg;
3154 /* Make it a response */
3155 msg->rsp[0] = msg->data[0] | 4;
3156 msg->rsp[1] = msg->data[1];
3157 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
3159 smi_info->curr_msg = NULL;
3160 deliver_recv_msg(smi_info, msg);
3164 * dell_poweredge_bt_xaction_handler
3165 * @info - smi_info.device_id must be populated
3167 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3168 * not respond to a Get SDR command if the length of the data
3169 * requested is exactly 0x3A, which leads to command timeouts and no
3170 * data returned. This intercepts such commands, and causes userspace
3171 * callers to try again with a different-sized buffer, which succeeds.
3174 #define STORAGE_NETFN 0x0A
3175 #define STORAGE_CMD_GET_SDR 0x23
3176 static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
3177 unsigned long unused,
3180 struct smi_info *smi_info = in;
3181 unsigned char *data = smi_info->curr_msg->data;
3182 unsigned int size = smi_info->curr_msg->data_size;
3184 (data[0]>>2) == STORAGE_NETFN &&
3185 data[1] == STORAGE_CMD_GET_SDR &&
3187 return_hosed_msg_badsize(smi_info);
3193 static struct notifier_block dell_poweredge_bt_xaction_notifier = {
3194 .notifier_call = dell_poweredge_bt_xaction_handler,
3198 * setup_dell_poweredge_bt_xaction_handler
3199 * @info - smi_info.device_id must be filled in already
3201 * Fills in smi_info.device_id.start_transaction_pre_hook
3202 * when we know what function to use there.
3205 setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
3207 struct ipmi_device_id *id = &smi_info->device_id;
3208 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
3209 smi_info->si_type == SI_BT)
3210 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
3214 * setup_oem_data_handler
3215 * @info - smi_info.device_id must be filled in already
3217 * Fills in smi_info.device_id.oem_data_available_handler
3218 * when we know what function to use there.
3221 static void setup_oem_data_handler(struct smi_info *smi_info)
3223 setup_dell_poweredge_oem_data_handler(smi_info);
3226 static void setup_xaction_handlers(struct smi_info *smi_info)
3228 setup_dell_poweredge_bt_xaction_handler(smi_info);
3231 static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3233 if (smi_info->thread != NULL)
3234 kthread_stop(smi_info->thread);
3235 if (smi_info->timer_running)
3236 del_timer_sync(&smi_info->si_timer);
3239 static struct ipmi_default_vals
3245 { .type = SI_KCS, .port = 0xca2 },
3246 { .type = SI_SMIC, .port = 0xca9 },
3247 { .type = SI_BT, .port = 0xe4 },
3251 static void default_find_bmc(void)
3253 struct smi_info *info;
3256 for (i = 0; ; i++) {
3257 if (!ipmi_defaults[i].port)
3260 if (check_legacy_ioport(ipmi_defaults[i].port))
3263 info = smi_info_alloc();
3267 info->addr_source = SI_DEFAULT;
3269 info->si_type = ipmi_defaults[i].type;
3270 info->io_setup = port_setup;
3271 info->io.addr_data = ipmi_defaults[i].port;
3272 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3274 info->io.addr = NULL;
3275 info->io.regspacing = DEFAULT_REGSPACING;
3276 info->io.regsize = DEFAULT_REGSPACING;
3277 info->io.regshift = 0;
3279 if (add_smi(info) == 0) {
3280 if ((try_smi_init(info)) == 0) {
3282 printk(KERN_INFO PFX "Found default %s"
3283 " state machine at %s address 0x%lx\n",
3284 si_to_str[info->si_type],
3285 addr_space_to_str[info->io.addr_type],
3286 info->io.addr_data);
3288 cleanup_one_si(info);
3295 static int is_new_interface(struct smi_info *info)
3299 list_for_each_entry(e, &smi_infos, link) {
3300 if (e->io.addr_type != info->io.addr_type)
3302 if (e->io.addr_data == info->io.addr_data)
3309 static int add_smi(struct smi_info *new_smi)
3313 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
3314 ipmi_addr_src_to_str(new_smi->addr_source),
3315 si_to_str[new_smi->si_type]);
3316 mutex_lock(&smi_infos_lock);
3317 if (!is_new_interface(new_smi)) {
3318 printk(KERN_CONT " duplicate interface\n");
3323 printk(KERN_CONT "\n");
3325 /* So we know not to free it unless we have allocated one. */
3326 new_smi->intf = NULL;
3327 new_smi->si_sm = NULL;
3328 new_smi->handlers = NULL;
3330 list_add_tail(&new_smi->link, &smi_infos);
3333 mutex_unlock(&smi_infos_lock);
3337 static int try_smi_init(struct smi_info *new_smi)
3342 printk(KERN_INFO PFX "Trying %s-specified %s state"
3343 " machine at %s address 0x%lx, slave address 0x%x,"
3345 ipmi_addr_src_to_str(new_smi->addr_source),
3346 si_to_str[new_smi->si_type],
3347 addr_space_to_str[new_smi->io.addr_type],
3348 new_smi->io.addr_data,
3349 new_smi->slave_addr, new_smi->irq);
3351 switch (new_smi->si_type) {
3353 new_smi->handlers = &kcs_smi_handlers;
3357 new_smi->handlers = &smic_smi_handlers;
3361 new_smi->handlers = &bt_smi_handlers;
3365 /* No support for anything else yet. */
3370 /* Allocate the state machine's data and initialize it. */
3371 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
3372 if (!new_smi->si_sm) {
3374 "Could not allocate state machine memory\n");
3378 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3381 /* Now that we know the I/O size, we can set up the I/O. */
3382 rv = new_smi->io_setup(new_smi);
3384 printk(KERN_ERR PFX "Could not set up I/O space\n");
3388 /* Do low-level detection first. */
3389 if (new_smi->handlers->detect(new_smi->si_sm)) {
3390 if (new_smi->addr_source)
3391 printk(KERN_INFO PFX "Interface detection failed\n");
3397 * Attempt a get device id command. If it fails, we probably
3398 * don't have a BMC here.
3400 rv = try_get_dev_id(new_smi);
3402 if (new_smi->addr_source)
3403 printk(KERN_INFO PFX "There appears to be no BMC"
3404 " at this location\n");
3408 setup_oem_data_handler(new_smi);
3409 setup_xaction_handlers(new_smi);
3411 new_smi->waiting_msg = NULL;
3412 new_smi->curr_msg = NULL;
3413 atomic_set(&new_smi->req_events, 0);
3414 new_smi->run_to_completion = false;
3415 for (i = 0; i < SI_NUM_STATS; i++)
3416 atomic_set(&new_smi->stats[i], 0);
3418 new_smi->interrupt_disabled = true;
3419 atomic_set(&new_smi->need_watch, 0);
3420 new_smi->intf_num = smi_num;
3423 rv = try_enable_event_buffer(new_smi);
3425 new_smi->has_event_buffer = true;
3428 * Start clearing the flags before we enable interrupts or the
3429 * timer to avoid racing with the timer.
3431 start_clear_flags(new_smi);
3434 * IRQ is defined to be set when non-zero. req_events will
3435 * cause a global flags check that will enable interrupts.
3438 new_smi->interrupt_disabled = false;
3439 atomic_set(&new_smi->req_events, 1);
3442 if (!new_smi->dev) {
3444 * If we don't already have a device from something
3445 * else (like PCI), then register a new one.
3447 new_smi->pdev = platform_device_alloc("ipmi_si",
3449 if (!new_smi->pdev) {
3451 "Unable to allocate platform device\n");
3454 new_smi->dev = &new_smi->pdev->dev;
3455 new_smi->dev->driver = &ipmi_driver.driver;
3457 rv = platform_device_add(new_smi->pdev);
3460 "Unable to register system interface device:"
3465 new_smi->dev_registered = true;
3468 rv = ipmi_register_smi(&handlers,
3470 &new_smi->device_id,
3472 new_smi->slave_addr);
3474 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3476 goto out_err_stop_timer;
3479 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
3483 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3484 goto out_err_stop_timer;
3487 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
3488 &smi_si_stats_proc_ops,
3491 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3492 goto out_err_stop_timer;
3495 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
3496 &smi_params_proc_ops,
3499 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
3500 goto out_err_stop_timer;
3503 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3504 si_to_str[new_smi->si_type]);
3509 wait_for_timer_and_thread(new_smi);
3512 new_smi->interrupt_disabled = true;
3514 if (new_smi->intf) {
3515 ipmi_smi_t intf = new_smi->intf;
3516 new_smi->intf = NULL;
3517 ipmi_unregister_smi(intf);
3520 if (new_smi->irq_cleanup) {
3521 new_smi->irq_cleanup(new_smi);
3522 new_smi->irq_cleanup = NULL;
3526 * Wait until we know that we are out of any interrupt
3527 * handlers might have been running before we freed the
3530 synchronize_sched();
3532 if (new_smi->si_sm) {
3533 if (new_smi->handlers)
3534 new_smi->handlers->cleanup(new_smi->si_sm);
3535 kfree(new_smi->si_sm);
3536 new_smi->si_sm = NULL;
3538 if (new_smi->addr_source_cleanup) {
3539 new_smi->addr_source_cleanup(new_smi);
3540 new_smi->addr_source_cleanup = NULL;
3542 if (new_smi->io_cleanup) {
3543 new_smi->io_cleanup(new_smi);
3544 new_smi->io_cleanup = NULL;
3547 if (new_smi->dev_registered) {
3548 platform_device_unregister(new_smi->pdev);
3549 new_smi->dev_registered = false;
3555 static int init_ipmi_si(void)
3561 enum ipmi_addr_src type = SI_INVALID;
3567 if (si_tryplatform) {
3568 rv = platform_driver_register(&ipmi_driver);
3570 printk(KERN_ERR PFX "Unable to register "
3571 "driver: %d\n", rv);
3576 /* Parse out the si_type string into its components. */
3579 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
3581 str = strchr(str, ',');
3591 printk(KERN_INFO "IPMI System Interface driver.\n");
3593 /* If the user gave us a device, they presumably want us to use it */
3594 if (!hardcode_find_bmc())
3599 rv = pci_register_driver(&ipmi_pci_driver);
3601 printk(KERN_ERR PFX "Unable to register "
3602 "PCI driver: %d\n", rv);
3604 pci_registered = true;
3610 pnp_register_driver(&ipmi_pnp_driver);
3611 pnp_registered = true;
3625 #ifdef CONFIG_PARISC
3626 register_parisc_driver(&ipmi_parisc_driver);
3627 parisc_registered = true;
3628 /* poking PC IO addresses will crash machine, don't do it */
3632 /* We prefer devices with interrupts, but in the case of a machine
3633 with multiple BMCs we assume that there will be several instances
3634 of a given type so if we succeed in registering a type then also
3635 try to register everything else of the same type */
3637 mutex_lock(&smi_infos_lock);
3638 list_for_each_entry(e, &smi_infos, link) {
3639 /* Try to register a device if it has an IRQ and we either
3640 haven't successfully registered a device yet or this
3641 device has the same type as one we successfully registered */
3642 if (e->irq && (!type || e->addr_source == type)) {
3643 if (!try_smi_init(e)) {
3644 type = e->addr_source;
3649 /* type will only have been set if we successfully registered an si */
3651 mutex_unlock(&smi_infos_lock);
3655 /* Fall back to the preferred device */
3657 list_for_each_entry(e, &smi_infos, link) {
3658 if (!e->irq && (!type || e->addr_source == type)) {
3659 if (!try_smi_init(e)) {
3660 type = e->addr_source;
3664 mutex_unlock(&smi_infos_lock);
3669 if (si_trydefaults) {
3670 mutex_lock(&smi_infos_lock);
3671 if (list_empty(&smi_infos)) {
3672 /* No BMC was found, try defaults. */
3673 mutex_unlock(&smi_infos_lock);
3676 mutex_unlock(&smi_infos_lock);
3679 mutex_lock(&smi_infos_lock);
3680 if (unload_when_empty && list_empty(&smi_infos)) {
3681 mutex_unlock(&smi_infos_lock);
3683 printk(KERN_WARNING PFX
3684 "Unable to find any System Interface(s)\n");
3687 mutex_unlock(&smi_infos_lock);
3691 module_init(init_ipmi_si);
3693 static void cleanup_one_si(struct smi_info *to_clean)
3700 if (to_clean->intf) {
3701 ipmi_smi_t intf = to_clean->intf;
3703 to_clean->intf = NULL;
3704 rv = ipmi_unregister_smi(intf);
3706 pr_err(PFX "Unable to unregister device: errno=%d\n",
3712 dev_set_drvdata(to_clean->dev, NULL);
3714 list_del(&to_clean->link);
3717 * Make sure that interrupts, the timer and the thread are
3718 * stopped and will not run again.
3720 if (to_clean->irq_cleanup)
3721 to_clean->irq_cleanup(to_clean);
3722 wait_for_timer_and_thread(to_clean);
3725 * Timeouts are stopped, now make sure the interrupts are off
3726 * in the BMC. Note that timers and CPU interrupts are off,
3727 * so no need for locks.
3729 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3731 schedule_timeout_uninterruptible(1);
3733 disable_si_irq(to_clean);
3734 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3736 schedule_timeout_uninterruptible(1);
3739 if (to_clean->handlers)
3740 to_clean->handlers->cleanup(to_clean->si_sm);
3742 kfree(to_clean->si_sm);
3744 if (to_clean->addr_source_cleanup)
3745 to_clean->addr_source_cleanup(to_clean);
3746 if (to_clean->io_cleanup)
3747 to_clean->io_cleanup(to_clean);
3749 if (to_clean->dev_registered)
3750 platform_device_unregister(to_clean->pdev);
3755 static void cleanup_ipmi_si(void)
3757 struct smi_info *e, *tmp_e;
3764 pci_unregister_driver(&ipmi_pci_driver);
3768 pnp_unregister_driver(&ipmi_pnp_driver);
3770 #ifdef CONFIG_PARISC
3771 if (parisc_registered)
3772 unregister_parisc_driver(&ipmi_parisc_driver);
3775 platform_driver_unregister(&ipmi_driver);
3777 mutex_lock(&smi_infos_lock);
3778 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3780 mutex_unlock(&smi_infos_lock);
3782 module_exit(cleanup_ipmi_si);
3784 MODULE_LICENSE("GPL");
3785 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3786 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3787 " system interfaces.");