4 * The interface to the IPMI driver for the system interfaces (KCS, SMIC,
7 * Author: MontaVista Software, Inc.
8 * Corey Minyard <minyard@mvista.com>
11 * Copyright 2002 MontaVista Software Inc.
12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/sched.h>
45 #include <linux/seq_file.h>
46 #include <linux/timer.h>
47 #include <linux/errno.h>
48 #include <linux/spinlock.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/list.h>
52 #include <linux/pci.h>
53 #include <linux/ioport.h>
54 #include <linux/notifier.h>
55 #include <linux/mutex.h>
56 #include <linux/kthread.h>
58 #include <linux/interrupt.h>
59 #include <linux/rcupdate.h>
60 #include <linux/ipmi.h>
61 #include <linux/ipmi_smi.h>
63 #include "ipmi_si_sm.h"
64 #include <linux/init.h>
65 #include <linux/dmi.h>
66 #include <linux/string.h>
67 #include <linux/ctype.h>
68 #include <linux/pnp.h>
69 #include <linux/of_device.h>
70 #include <linux/of_platform.h>
71 #include <linux/of_address.h>
72 #include <linux/of_irq.h>
74 #define PFX "ipmi_si: "
76 /* Measure times between events in the driver. */
79 /* Call every 10 ms. */
80 #define SI_TIMEOUT_TIME_USEC 10000
81 #define SI_USEC_PER_JIFFY (1000000/HZ)
82 #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83 #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
91 SI_CLEARING_FLAGS_THEN_SET_IRQ
,
93 SI_ENABLE_INTERRUPTS1
,
94 SI_ENABLE_INTERRUPTS2
,
95 SI_DISABLE_INTERRUPTS1
,
96 SI_DISABLE_INTERRUPTS2
97 /* FIXME - add watchdog stuff. */
100 /* Some BT-specific defines we need here. */
101 #define IPMI_BT_INTMASK_REG 2
102 #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103 #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
106 SI_KCS
, SI_SMIC
, SI_BT
108 static char *si_to_str
[] = { "kcs", "smic", "bt" };
110 static char *ipmi_addr_src_to_str
[] = { NULL
, "hotmod", "hardcoded", "SPMI",
111 "ACPI", "SMBIOS", "PCI",
112 "device-tree", "default" };
114 #define DEVICE_NAME "ipmi_si"
116 static struct platform_driver ipmi_driver
;
119 * Indexes into stats[] in smi_info below.
121 enum si_stat_indexes
{
123 * Number of times the driver requested a timer while an operation
126 SI_STAT_short_timeouts
= 0,
129 * Number of times the driver requested a timer while nothing was in
132 SI_STAT_long_timeouts
,
134 /* Number of times the interface was idle while being polled. */
137 /* Number of interrupts the driver handled. */
140 /* Number of time the driver got an ATTN from the hardware. */
143 /* Number of times the driver requested flags from the hardware. */
144 SI_STAT_flag_fetches
,
146 /* Number of times the hardware didn't follow the state machine. */
149 /* Number of completed messages. */
150 SI_STAT_complete_transactions
,
152 /* Number of IPMI events received from the hardware. */
155 /* Number of watchdog pretimeouts. */
156 SI_STAT_watchdog_pretimeouts
,
158 /* Number of asynchronous messages received. */
159 SI_STAT_incoming_messages
,
162 /* This *must* remain last, add new values above this. */
169 struct si_sm_data
*si_sm
;
170 struct si_sm_handlers
*handlers
;
171 enum si_type si_type
;
173 struct list_head xmit_msgs
;
174 struct list_head hp_xmit_msgs
;
175 struct ipmi_smi_msg
*curr_msg
;
176 enum si_intf_state si_state
;
179 * Used to handle the various types of I/O that can occur with
183 int (*io_setup
)(struct smi_info
*info
);
184 void (*io_cleanup
)(struct smi_info
*info
);
185 int (*irq_setup
)(struct smi_info
*info
);
186 void (*irq_cleanup
)(struct smi_info
*info
);
187 unsigned int io_size
;
188 enum ipmi_addr_src addr_source
; /* ACPI, PCI, SMBIOS, hardcode, etc. */
189 void (*addr_source_cleanup
)(struct smi_info
*info
);
190 void *addr_source_data
;
193 * Per-OEM handler, called from handle_flags(). Returns 1
194 * when handle_flags() needs to be re-run or 0 indicating it
195 * set si_state itself.
197 int (*oem_data_avail_handler
)(struct smi_info
*smi_info
);
200 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
201 * is set to hold the flags until we are done handling everything
204 #define RECEIVE_MSG_AVAIL 0x01
205 #define EVENT_MSG_BUFFER_FULL 0x02
206 #define WDT_PRE_TIMEOUT_INT 0x08
207 #define OEM0_DATA_AVAIL 0x20
208 #define OEM1_DATA_AVAIL 0x40
209 #define OEM2_DATA_AVAIL 0x80
210 #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
213 unsigned char msg_flags
;
215 /* Does the BMC have an event buffer? */
216 char has_event_buffer
;
219 * If set to true, this will request events the next time the
220 * state machine is idle.
225 * If true, run the state machine to completion on every send
226 * call. Generally used after a panic to make sure stuff goes
229 int run_to_completion
;
231 /* The I/O port of an SI interface. */
235 * The space between start addresses of the two ports. For
236 * instance, if the first port is 0xca2 and the spacing is 4, then
237 * the second port is 0xca6.
239 unsigned int spacing
;
241 /* zero if no irq; */
244 /* The timer for this si. */
245 struct timer_list si_timer
;
247 /* This flag is set, if the timer is running (timer_pending() isn't enough) */
250 /* The time (in jiffies) the last timeout occurred at. */
251 unsigned long last_timeout_jiffies
;
253 /* Used to gracefully stop the timer without race conditions. */
254 atomic_t stop_operation
;
257 * The driver will disable interrupts when it gets into a
258 * situation where it cannot handle messages due to lack of
259 * memory. Once that situation clears up, it will re-enable
262 int interrupt_disabled
;
264 /* From the get device id response... */
265 struct ipmi_device_id device_id
;
267 /* Driver model stuff. */
269 struct platform_device
*pdev
;
272 * True if we allocated the device, false if it came from
273 * someplace else (like PCI).
277 /* Slave address, could be reported from DMI. */
278 unsigned char slave_addr
;
280 /* Counters and things for the proc filesystem. */
281 atomic_t stats
[SI_NUM_STATS
];
283 struct task_struct
*thread
;
285 struct list_head link
;
286 union ipmi_smi_info_union addr_info
;
289 #define smi_inc_stat(smi, stat) \
290 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
291 #define smi_get_stat(smi, stat) \
292 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
294 #define SI_MAX_PARMS 4
296 static int force_kipmid
[SI_MAX_PARMS
];
297 static int num_force_kipmid
;
299 static int pci_registered
;
302 static int pnp_registered
;
305 static unsigned int kipmid_max_busy_us
[SI_MAX_PARMS
];
306 static int num_max_busy_us
;
308 static int unload_when_empty
= 1;
310 static int add_smi(struct smi_info
*smi
);
311 static int try_smi_init(struct smi_info
*smi
);
312 static void cleanup_one_si(struct smi_info
*to_clean
);
313 static void cleanup_ipmi_si(void);
315 static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list
);
316 static int register_xaction_notifier(struct notifier_block
*nb
)
318 return atomic_notifier_chain_register(&xaction_notifier_list
, nb
);
321 static void deliver_recv_msg(struct smi_info
*smi_info
,
322 struct ipmi_smi_msg
*msg
)
324 /* Deliver the message to the upper layer. */
325 ipmi_smi_msg_received(smi_info
->intf
, msg
);
328 static void return_hosed_msg(struct smi_info
*smi_info
, int cCode
)
330 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
332 if (cCode
< 0 || cCode
> IPMI_ERR_UNSPECIFIED
)
333 cCode
= IPMI_ERR_UNSPECIFIED
;
334 /* else use it as is */
336 /* Make it a response */
337 msg
->rsp
[0] = msg
->data
[0] | 4;
338 msg
->rsp
[1] = msg
->data
[1];
342 smi_info
->curr_msg
= NULL
;
343 deliver_recv_msg(smi_info
, msg
);
346 static enum si_sm_result
start_next_msg(struct smi_info
*smi_info
)
349 struct list_head
*entry
= NULL
;
354 /* Pick the high priority queue first. */
355 if (!list_empty(&(smi_info
->hp_xmit_msgs
))) {
356 entry
= smi_info
->hp_xmit_msgs
.next
;
357 } else if (!list_empty(&(smi_info
->xmit_msgs
))) {
358 entry
= smi_info
->xmit_msgs
.next
;
362 smi_info
->curr_msg
= NULL
;
368 smi_info
->curr_msg
= list_entry(entry
,
373 printk(KERN_DEBUG
"**Start2: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
375 err
= atomic_notifier_call_chain(&xaction_notifier_list
,
377 if (err
& NOTIFY_STOP_MASK
) {
378 rv
= SI_SM_CALL_WITHOUT_DELAY
;
381 err
= smi_info
->handlers
->start_transaction(
383 smi_info
->curr_msg
->data
,
384 smi_info
->curr_msg
->data_size
);
386 return_hosed_msg(smi_info
, err
);
388 rv
= SI_SM_CALL_WITHOUT_DELAY
;
394 static void start_enable_irq(struct smi_info
*smi_info
)
396 unsigned char msg
[2];
399 * If we are enabling interrupts, we have to tell the
402 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
403 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
405 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
406 smi_info
->si_state
= SI_ENABLE_INTERRUPTS1
;
409 static void start_disable_irq(struct smi_info
*smi_info
)
411 unsigned char msg
[2];
413 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
414 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
416 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
417 smi_info
->si_state
= SI_DISABLE_INTERRUPTS1
;
420 static void start_clear_flags(struct smi_info
*smi_info
)
422 unsigned char msg
[3];
424 /* Make sure the watchdog pre-timeout flag is not set at startup. */
425 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
426 msg
[1] = IPMI_CLEAR_MSG_FLAGS_CMD
;
427 msg
[2] = WDT_PRE_TIMEOUT_INT
;
429 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
430 smi_info
->si_state
= SI_CLEARING_FLAGS
;
433 static void smi_mod_timer(struct smi_info
*smi_info
, unsigned long new_val
)
435 smi_info
->last_timeout_jiffies
= jiffies
;
436 mod_timer(&smi_info
->si_timer
, new_val
);
437 smi_info
->timer_running
= true;
441 * When we have a situtaion where we run out of memory and cannot
442 * allocate messages, we just leave them in the BMC and run the system
443 * polled until we can allocate some memory. Once we have some
444 * memory, we will re-enable the interrupt.
446 static inline void disable_si_irq(struct smi_info
*smi_info
)
448 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
449 start_disable_irq(smi_info
);
450 smi_info
->interrupt_disabled
= 1;
451 if (!atomic_read(&smi_info
->stop_operation
))
452 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
456 static inline void enable_si_irq(struct smi_info
*smi_info
)
458 if ((smi_info
->irq
) && (smi_info
->interrupt_disabled
)) {
459 start_enable_irq(smi_info
);
460 smi_info
->interrupt_disabled
= 0;
464 static void handle_flags(struct smi_info
*smi_info
)
467 if (smi_info
->msg_flags
& WDT_PRE_TIMEOUT_INT
) {
468 /* Watchdog pre-timeout */
469 smi_inc_stat(smi_info
, watchdog_pretimeouts
);
471 start_clear_flags(smi_info
);
472 smi_info
->msg_flags
&= ~WDT_PRE_TIMEOUT_INT
;
473 ipmi_smi_watchdog_pretimeout(smi_info
->intf
);
474 } else if (smi_info
->msg_flags
& RECEIVE_MSG_AVAIL
) {
475 /* Messages available. */
476 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
477 if (!smi_info
->curr_msg
) {
478 disable_si_irq(smi_info
);
479 smi_info
->si_state
= SI_NORMAL
;
482 enable_si_irq(smi_info
);
484 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
485 smi_info
->curr_msg
->data
[1] = IPMI_GET_MSG_CMD
;
486 smi_info
->curr_msg
->data_size
= 2;
488 smi_info
->handlers
->start_transaction(
490 smi_info
->curr_msg
->data
,
491 smi_info
->curr_msg
->data_size
);
492 smi_info
->si_state
= SI_GETTING_MESSAGES
;
493 } else if (smi_info
->msg_flags
& EVENT_MSG_BUFFER_FULL
) {
494 /* Events available. */
495 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
496 if (!smi_info
->curr_msg
) {
497 disable_si_irq(smi_info
);
498 smi_info
->si_state
= SI_NORMAL
;
501 enable_si_irq(smi_info
);
503 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
504 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
505 smi_info
->curr_msg
->data_size
= 2;
507 smi_info
->handlers
->start_transaction(
509 smi_info
->curr_msg
->data
,
510 smi_info
->curr_msg
->data_size
);
511 smi_info
->si_state
= SI_GETTING_EVENTS
;
512 } else if (smi_info
->msg_flags
& OEM_DATA_AVAIL
&&
513 smi_info
->oem_data_avail_handler
) {
514 if (smi_info
->oem_data_avail_handler(smi_info
))
517 smi_info
->si_state
= SI_NORMAL
;
520 static void handle_transaction_done(struct smi_info
*smi_info
)
522 struct ipmi_smi_msg
*msg
;
527 printk(KERN_DEBUG
"**Done: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
529 switch (smi_info
->si_state
) {
531 if (!smi_info
->curr_msg
)
534 smi_info
->curr_msg
->rsp_size
535 = smi_info
->handlers
->get_result(
537 smi_info
->curr_msg
->rsp
,
538 IPMI_MAX_MSG_LENGTH
);
541 * Do this here becase deliver_recv_msg() releases the
542 * lock, and a new message can be put in during the
543 * time the lock is released.
545 msg
= smi_info
->curr_msg
;
546 smi_info
->curr_msg
= NULL
;
547 deliver_recv_msg(smi_info
, msg
);
550 case SI_GETTING_FLAGS
:
552 unsigned char msg
[4];
555 /* We got the flags from the SMI, now handle them. */
556 len
= smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
558 /* Error fetching flags, just give up for now. */
559 smi_info
->si_state
= SI_NORMAL
;
560 } else if (len
< 4) {
562 * Hmm, no flags. That's technically illegal, but
563 * don't use uninitialized data.
565 smi_info
->si_state
= SI_NORMAL
;
567 smi_info
->msg_flags
= msg
[3];
568 handle_flags(smi_info
);
573 case SI_CLEARING_FLAGS
:
574 case SI_CLEARING_FLAGS_THEN_SET_IRQ
:
576 unsigned char msg
[3];
578 /* We cleared the flags. */
579 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 3);
581 /* Error clearing flags */
582 dev_warn(smi_info
->dev
,
583 "Error clearing flags: %2.2x\n", msg
[2]);
585 if (smi_info
->si_state
== SI_CLEARING_FLAGS_THEN_SET_IRQ
)
586 start_enable_irq(smi_info
);
588 smi_info
->si_state
= SI_NORMAL
;
592 case SI_GETTING_EVENTS
:
594 smi_info
->curr_msg
->rsp_size
595 = smi_info
->handlers
->get_result(
597 smi_info
->curr_msg
->rsp
,
598 IPMI_MAX_MSG_LENGTH
);
601 * Do this here becase deliver_recv_msg() releases the
602 * lock, and a new message can be put in during the
603 * time the lock is released.
605 msg
= smi_info
->curr_msg
;
606 smi_info
->curr_msg
= NULL
;
607 if (msg
->rsp
[2] != 0) {
608 /* Error getting event, probably done. */
611 /* Take off the event flag. */
612 smi_info
->msg_flags
&= ~EVENT_MSG_BUFFER_FULL
;
613 handle_flags(smi_info
);
615 smi_inc_stat(smi_info
, events
);
618 * Do this before we deliver the message
619 * because delivering the message releases the
620 * lock and something else can mess with the
623 handle_flags(smi_info
);
625 deliver_recv_msg(smi_info
, msg
);
630 case SI_GETTING_MESSAGES
:
632 smi_info
->curr_msg
->rsp_size
633 = smi_info
->handlers
->get_result(
635 smi_info
->curr_msg
->rsp
,
636 IPMI_MAX_MSG_LENGTH
);
639 * Do this here becase deliver_recv_msg() releases the
640 * lock, and a new message can be put in during the
641 * time the lock is released.
643 msg
= smi_info
->curr_msg
;
644 smi_info
->curr_msg
= NULL
;
645 if (msg
->rsp
[2] != 0) {
646 /* Error getting event, probably done. */
649 /* Take off the msg flag. */
650 smi_info
->msg_flags
&= ~RECEIVE_MSG_AVAIL
;
651 handle_flags(smi_info
);
653 smi_inc_stat(smi_info
, incoming_messages
);
656 * Do this before we deliver the message
657 * because delivering the message releases the
658 * lock and something else can mess with the
661 handle_flags(smi_info
);
663 deliver_recv_msg(smi_info
, msg
);
668 case SI_ENABLE_INTERRUPTS1
:
670 unsigned char msg
[4];
672 /* We got the flags from the SMI, now handle them. */
673 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
675 dev_warn(smi_info
->dev
,
676 "Couldn't get irq info: %x.\n", msg
[2]);
677 dev_warn(smi_info
->dev
,
678 "Maybe ok, but ipmi might run very slowly.\n");
679 smi_info
->si_state
= SI_NORMAL
;
681 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
682 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
684 IPMI_BMC_RCV_MSG_INTR
|
685 IPMI_BMC_EVT_MSG_INTR
);
686 smi_info
->handlers
->start_transaction(
687 smi_info
->si_sm
, msg
, 3);
688 smi_info
->si_state
= SI_ENABLE_INTERRUPTS2
;
693 case SI_ENABLE_INTERRUPTS2
:
695 unsigned char msg
[4];
697 /* We got the flags from the SMI, now handle them. */
698 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
700 dev_warn(smi_info
->dev
,
701 "Couldn't set irq info: %x.\n", msg
[2]);
702 dev_warn(smi_info
->dev
,
703 "Maybe ok, but ipmi might run very slowly.\n");
705 smi_info
->interrupt_disabled
= 0;
706 smi_info
->si_state
= SI_NORMAL
;
710 case SI_DISABLE_INTERRUPTS1
:
712 unsigned char msg
[4];
714 /* We got the flags from the SMI, now handle them. */
715 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
717 dev_warn(smi_info
->dev
, "Could not disable interrupts"
719 smi_info
->si_state
= SI_NORMAL
;
721 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
722 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
724 ~(IPMI_BMC_RCV_MSG_INTR
|
725 IPMI_BMC_EVT_MSG_INTR
));
726 smi_info
->handlers
->start_transaction(
727 smi_info
->si_sm
, msg
, 3);
728 smi_info
->si_state
= SI_DISABLE_INTERRUPTS2
;
733 case SI_DISABLE_INTERRUPTS2
:
735 unsigned char msg
[4];
737 /* We got the flags from the SMI, now handle them. */
738 smi_info
->handlers
->get_result(smi_info
->si_sm
, msg
, 4);
740 dev_warn(smi_info
->dev
, "Could not disable interrupts"
743 smi_info
->si_state
= SI_NORMAL
;
750 * Called on timeouts and events. Timeouts should pass the elapsed
751 * time, interrupts should pass in zero. Must be called with
752 * si_lock held and interrupts disabled.
754 static enum si_sm_result
smi_event_handler(struct smi_info
*smi_info
,
757 enum si_sm_result si_sm_result
;
761 * There used to be a loop here that waited a little while
762 * (around 25us) before giving up. That turned out to be
763 * pointless, the minimum delays I was seeing were in the 300us
764 * range, which is far too long to wait in an interrupt. So
765 * we just run until the state machine tells us something
766 * happened or it needs a delay.
768 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, time
);
770 while (si_sm_result
== SI_SM_CALL_WITHOUT_DELAY
)
771 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
773 if (si_sm_result
== SI_SM_TRANSACTION_COMPLETE
) {
774 smi_inc_stat(smi_info
, complete_transactions
);
776 handle_transaction_done(smi_info
);
777 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
778 } else if (si_sm_result
== SI_SM_HOSED
) {
779 smi_inc_stat(smi_info
, hosed_count
);
782 * Do the before return_hosed_msg, because that
785 smi_info
->si_state
= SI_NORMAL
;
786 if (smi_info
->curr_msg
!= NULL
) {
788 * If we were handling a user message, format
789 * a response to send to the upper layer to
790 * tell it about the error.
792 return_hosed_msg(smi_info
, IPMI_ERR_UNSPECIFIED
);
794 si_sm_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
798 * We prefer handling attn over new messages. But don't do
799 * this if there is not yet an upper layer to handle anything.
801 if (likely(smi_info
->intf
) && si_sm_result
== SI_SM_ATTN
) {
802 unsigned char msg
[2];
804 smi_inc_stat(smi_info
, attentions
);
807 * Got a attn, send down a get message flags to see
808 * what's causing it. It would be better to handle
809 * this in the upper layer, but due to the way
810 * interrupts work with the SMI, that's not really
813 msg
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
814 msg
[1] = IPMI_GET_MSG_FLAGS_CMD
;
816 smi_info
->handlers
->start_transaction(
817 smi_info
->si_sm
, msg
, 2);
818 smi_info
->si_state
= SI_GETTING_FLAGS
;
822 /* If we are currently idle, try to start the next message. */
823 if (si_sm_result
== SI_SM_IDLE
) {
824 smi_inc_stat(smi_info
, idles
);
826 si_sm_result
= start_next_msg(smi_info
);
827 if (si_sm_result
!= SI_SM_IDLE
)
831 if ((si_sm_result
== SI_SM_IDLE
)
832 && (atomic_read(&smi_info
->req_events
))) {
834 * We are idle and the upper layer requested that I fetch
837 atomic_set(&smi_info
->req_events
, 0);
839 smi_info
->curr_msg
= ipmi_alloc_smi_msg();
840 if (!smi_info
->curr_msg
)
843 smi_info
->curr_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
844 smi_info
->curr_msg
->data
[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD
;
845 smi_info
->curr_msg
->data_size
= 2;
847 smi_info
->handlers
->start_transaction(
849 smi_info
->curr_msg
->data
,
850 smi_info
->curr_msg
->data_size
);
851 smi_info
->si_state
= SI_GETTING_EVENTS
;
858 static void sender(void *send_info
,
859 struct ipmi_smi_msg
*msg
,
862 struct smi_info
*smi_info
= send_info
;
863 enum si_sm_result result
;
869 if (atomic_read(&smi_info
->stop_operation
)) {
870 msg
->rsp
[0] = msg
->data
[0] | 4;
871 msg
->rsp
[1] = msg
->data
[1];
872 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
874 deliver_recv_msg(smi_info
, msg
);
880 printk("**Enqueue: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
883 if (smi_info
->run_to_completion
) {
885 * If we are running to completion, then throw it in
886 * the list and run transactions until everything is
887 * clear. Priority doesn't matter here.
891 * Run to completion means we are single-threaded, no
894 list_add_tail(&(msg
->link
), &(smi_info
->xmit_msgs
));
896 result
= smi_event_handler(smi_info
, 0);
897 while (result
!= SI_SM_IDLE
) {
898 udelay(SI_SHORT_TIMEOUT_USEC
);
899 result
= smi_event_handler(smi_info
,
900 SI_SHORT_TIMEOUT_USEC
);
905 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
907 list_add_tail(&msg
->link
, &smi_info
->hp_xmit_msgs
);
909 list_add_tail(&msg
->link
, &smi_info
->xmit_msgs
);
911 if (smi_info
->si_state
== SI_NORMAL
&& smi_info
->curr_msg
== NULL
) {
912 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
914 if (smi_info
->thread
)
915 wake_up_process(smi_info
->thread
);
917 start_next_msg(smi_info
);
918 smi_event_handler(smi_info
, 0);
920 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
923 static void set_run_to_completion(void *send_info
, int i_run_to_completion
)
925 struct smi_info
*smi_info
= send_info
;
926 enum si_sm_result result
;
928 smi_info
->run_to_completion
= i_run_to_completion
;
929 if (i_run_to_completion
) {
930 result
= smi_event_handler(smi_info
, 0);
931 while (result
!= SI_SM_IDLE
) {
932 udelay(SI_SHORT_TIMEOUT_USEC
);
933 result
= smi_event_handler(smi_info
,
934 SI_SHORT_TIMEOUT_USEC
);
940 * Use -1 in the nsec value of the busy waiting timespec to tell that
941 * we are spinning in kipmid looking for something and not delaying
944 static inline void ipmi_si_set_not_busy(struct timespec
*ts
)
948 static inline int ipmi_si_is_busy(struct timespec
*ts
)
950 return ts
->tv_nsec
!= -1;
953 static int ipmi_thread_busy_wait(enum si_sm_result smi_result
,
954 const struct smi_info
*smi_info
,
955 struct timespec
*busy_until
)
957 unsigned int max_busy_us
= 0;
959 if (smi_info
->intf_num
< num_max_busy_us
)
960 max_busy_us
= kipmid_max_busy_us
[smi_info
->intf_num
];
961 if (max_busy_us
== 0 || smi_result
!= SI_SM_CALL_WITH_DELAY
)
962 ipmi_si_set_not_busy(busy_until
);
963 else if (!ipmi_si_is_busy(busy_until
)) {
964 getnstimeofday(busy_until
);
965 timespec_add_ns(busy_until
, max_busy_us
*NSEC_PER_USEC
);
968 getnstimeofday(&now
);
969 if (unlikely(timespec_compare(&now
, busy_until
) > 0)) {
970 ipmi_si_set_not_busy(busy_until
);
979 * A busy-waiting loop for speeding up IPMI operation.
981 * Lousy hardware makes this hard. This is only enabled for systems
982 * that are not BT and do not have interrupts. It starts spinning
983 * when an operation is complete or until max_busy tells it to stop
984 * (if that is enabled). See the paragraph on kimid_max_busy_us in
985 * Documentation/IPMI.txt for details.
987 static int ipmi_thread(void *data
)
989 struct smi_info
*smi_info
= data
;
991 enum si_sm_result smi_result
;
992 struct timespec busy_until
;
994 ipmi_si_set_not_busy(&busy_until
);
995 set_user_nice(current
, 19);
996 while (!kthread_should_stop()) {
999 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1000 smi_result
= smi_event_handler(smi_info
, 0);
1003 * If the driver is doing something, there is a possible
1004 * race with the timer. If the timer handler see idle,
1005 * and the thread here sees something else, the timer
1006 * handler won't restart the timer even though it is
1007 * required. So start it here if necessary.
1009 if (smi_result
!= SI_SM_IDLE
&& !smi_info
->timer_running
)
1010 smi_mod_timer(smi_info
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1012 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1013 busy_wait
= ipmi_thread_busy_wait(smi_result
, smi_info
,
1015 if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
)
1017 else if (smi_result
== SI_SM_CALL_WITH_DELAY
&& busy_wait
)
1019 else if (smi_result
== SI_SM_IDLE
)
1020 schedule_timeout_interruptible(100);
1022 schedule_timeout_interruptible(1);
1028 static void poll(void *send_info
)
1030 struct smi_info
*smi_info
= send_info
;
1031 unsigned long flags
= 0;
1032 int run_to_completion
= smi_info
->run_to_completion
;
1035 * Make sure there is some delay in the poll loop so we can
1036 * drive time forward and timeout things.
1039 if (!run_to_completion
)
1040 spin_lock_irqsave(&smi_info
->si_lock
, flags
);
1041 smi_event_handler(smi_info
, 10);
1042 if (!run_to_completion
)
1043 spin_unlock_irqrestore(&smi_info
->si_lock
, flags
);
1046 static void request_events(void *send_info
)
1048 struct smi_info
*smi_info
= send_info
;
1050 if (atomic_read(&smi_info
->stop_operation
) ||
1051 !smi_info
->has_event_buffer
)
1054 atomic_set(&smi_info
->req_events
, 1);
1057 static int initialized
;
1059 static void smi_timeout(unsigned long data
)
1061 struct smi_info
*smi_info
= (struct smi_info
*) data
;
1062 enum si_sm_result smi_result
;
1063 unsigned long flags
;
1064 unsigned long jiffies_now
;
1071 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1073 do_gettimeofday(&t
);
1074 printk(KERN_DEBUG
"**Timer: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1076 jiffies_now
= jiffies
;
1077 time_diff
= (((long)jiffies_now
- (long)smi_info
->last_timeout_jiffies
)
1078 * SI_USEC_PER_JIFFY
);
1079 smi_result
= smi_event_handler(smi_info
, time_diff
);
1081 if ((smi_info
->irq
) && (!smi_info
->interrupt_disabled
)) {
1082 /* Running with interrupts, only do long timeouts. */
1083 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1084 smi_inc_stat(smi_info
, long_timeouts
);
1089 * If the state machine asks for a short delay, then shorten
1090 * the timer timeout.
1092 if (smi_result
== SI_SM_CALL_WITH_DELAY
) {
1093 smi_inc_stat(smi_info
, short_timeouts
);
1094 timeout
= jiffies
+ 1;
1096 smi_inc_stat(smi_info
, long_timeouts
);
1097 timeout
= jiffies
+ SI_TIMEOUT_JIFFIES
;
1101 if (smi_result
!= SI_SM_IDLE
)
1102 smi_mod_timer(smi_info
, timeout
);
1104 smi_info
->timer_running
= false;
1105 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1108 static irqreturn_t
si_irq_handler(int irq
, void *data
)
1110 struct smi_info
*smi_info
= data
;
1111 unsigned long flags
;
1116 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1118 smi_inc_stat(smi_info
, interrupts
);
1121 do_gettimeofday(&t
);
1122 printk(KERN_DEBUG
"**Interrupt: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1124 smi_event_handler(smi_info
, 0);
1125 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1129 static irqreturn_t
si_bt_irq_handler(int irq
, void *data
)
1131 struct smi_info
*smi_info
= data
;
1132 /* We need to clear the IRQ flag for the BT interface. */
1133 smi_info
->io
.outputb(&smi_info
->io
, IPMI_BT_INTMASK_REG
,
1134 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1135 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1136 return si_irq_handler(irq
, data
);
1139 static int smi_start_processing(void *send_info
,
1142 struct smi_info
*new_smi
= send_info
;
1145 new_smi
->intf
= intf
;
1147 /* Set up the timer that drives the interface. */
1148 setup_timer(&new_smi
->si_timer
, smi_timeout
, (long)new_smi
);
1149 smi_mod_timer(new_smi
, jiffies
+ SI_TIMEOUT_JIFFIES
);
1151 /* Try to claim any interrupts. */
1152 if (new_smi
->irq_setup
)
1153 new_smi
->irq_setup(new_smi
);
1156 * Check if the user forcefully enabled the daemon.
1158 if (new_smi
->intf_num
< num_force_kipmid
)
1159 enable
= force_kipmid
[new_smi
->intf_num
];
1161 * The BT interface is efficient enough to not need a thread,
1162 * and there is no need for a thread if we have interrupts.
1164 else if ((new_smi
->si_type
!= SI_BT
) && (!new_smi
->irq
))
1168 new_smi
->thread
= kthread_run(ipmi_thread
, new_smi
,
1169 "kipmi%d", new_smi
->intf_num
);
1170 if (IS_ERR(new_smi
->thread
)) {
1171 dev_notice(new_smi
->dev
, "Could not start"
1172 " kernel thread due to error %ld, only using"
1173 " timers to drive the interface\n",
1174 PTR_ERR(new_smi
->thread
));
1175 new_smi
->thread
= NULL
;
1182 static int get_smi_info(void *send_info
, struct ipmi_smi_info
*data
)
1184 struct smi_info
*smi
= send_info
;
1186 data
->addr_src
= smi
->addr_source
;
1187 data
->dev
= smi
->dev
;
1188 data
->addr_info
= smi
->addr_info
;
1189 get_device(smi
->dev
);
1194 static void set_maintenance_mode(void *send_info
, int enable
)
1196 struct smi_info
*smi_info
= send_info
;
1199 atomic_set(&smi_info
->req_events
, 0);
1202 static struct ipmi_smi_handlers handlers
= {
1203 .owner
= THIS_MODULE
,
1204 .start_processing
= smi_start_processing
,
1205 .get_smi_info
= get_smi_info
,
1207 .request_events
= request_events
,
1208 .set_maintenance_mode
= set_maintenance_mode
,
1209 .set_run_to_completion
= set_run_to_completion
,
1214 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1215 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1218 static LIST_HEAD(smi_infos
);
1219 static DEFINE_MUTEX(smi_infos_lock
);
1220 static int smi_num
; /* Used to sequence the SMIs */
1222 #define DEFAULT_REGSPACING 1
1223 #define DEFAULT_REGSIZE 1
1226 static bool si_tryacpi
= 1;
1229 static bool si_trydmi
= 1;
1231 static bool si_tryplatform
= 1;
1233 static bool si_trypci
= 1;
1235 static bool si_trydefaults
= 1;
1236 static char *si_type
[SI_MAX_PARMS
];
1237 #define MAX_SI_TYPE_STR 30
1238 static char si_type_str
[MAX_SI_TYPE_STR
];
1239 static unsigned long addrs
[SI_MAX_PARMS
];
1240 static unsigned int num_addrs
;
1241 static unsigned int ports
[SI_MAX_PARMS
];
1242 static unsigned int num_ports
;
1243 static int irqs
[SI_MAX_PARMS
];
1244 static unsigned int num_irqs
;
1245 static int regspacings
[SI_MAX_PARMS
];
1246 static unsigned int num_regspacings
;
1247 static int regsizes
[SI_MAX_PARMS
];
1248 static unsigned int num_regsizes
;
1249 static int regshifts
[SI_MAX_PARMS
];
1250 static unsigned int num_regshifts
;
1251 static int slave_addrs
[SI_MAX_PARMS
]; /* Leaving 0 chooses the default value */
1252 static unsigned int num_slave_addrs
;
1254 #define IPMI_IO_ADDR_SPACE 0
1255 #define IPMI_MEM_ADDR_SPACE 1
1256 static char *addr_space_to_str
[] = { "i/o", "mem" };
1258 static int hotmod_handler(const char *val
, struct kernel_param
*kp
);
1260 module_param_call(hotmod
, hotmod_handler
, NULL
, NULL
, 0200);
1261 MODULE_PARM_DESC(hotmod
, "Add and remove interfaces. See"
1262 " Documentation/IPMI.txt in the kernel sources for the"
1266 module_param_named(tryacpi
, si_tryacpi
, bool, 0);
1267 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1268 " default scan of the interfaces identified via ACPI");
1271 module_param_named(trydmi
, si_trydmi
, bool, 0);
1272 MODULE_PARM_DESC(trydmi
, "Setting this to zero will disable the"
1273 " default scan of the interfaces identified via DMI");
1275 module_param_named(tryplatform
, si_tryplatform
, bool, 0);
1276 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1277 " default scan of the interfaces identified via platform"
1278 " interfaces like openfirmware");
1280 module_param_named(trypci
, si_trypci
, bool, 0);
1281 MODULE_PARM_DESC(tryacpi
, "Setting this to zero will disable the"
1282 " default scan of the interfaces identified via pci");
1284 module_param_named(trydefaults
, si_trydefaults
, bool, 0);
1285 MODULE_PARM_DESC(trydefaults
, "Setting this to 'false' will disable the"
1286 " default scan of the KCS and SMIC interface at the standard"
1288 module_param_string(type
, si_type_str
, MAX_SI_TYPE_STR
, 0);
1289 MODULE_PARM_DESC(type
, "Defines the type of each interface, each"
1290 " interface separated by commas. The types are 'kcs',"
1291 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1292 " the first interface to kcs and the second to bt");
1293 module_param_array(addrs
, ulong
, &num_addrs
, 0);
1294 MODULE_PARM_DESC(addrs
, "Sets the memory address of each interface, the"
1295 " addresses separated by commas. Only use if an interface"
1296 " is in memory. Otherwise, set it to zero or leave"
1298 module_param_array(ports
, uint
, &num_ports
, 0);
1299 MODULE_PARM_DESC(ports
, "Sets the port address of each interface, the"
1300 " addresses separated by commas. Only use if an interface"
1301 " is a port. Otherwise, set it to zero or leave"
1303 module_param_array(irqs
, int, &num_irqs
, 0);
1304 MODULE_PARM_DESC(irqs
, "Sets the interrupt of each interface, the"
1305 " addresses separated by commas. Only use if an interface"
1306 " has an interrupt. Otherwise, set it to zero or leave"
1308 module_param_array(regspacings
, int, &num_regspacings
, 0);
1309 MODULE_PARM_DESC(regspacings
, "The number of bytes between the start address"
1310 " and each successive register used by the interface. For"
1311 " instance, if the start address is 0xca2 and the spacing"
1312 " is 2, then the second address is at 0xca4. Defaults"
1314 module_param_array(regsizes
, int, &num_regsizes
, 0);
1315 MODULE_PARM_DESC(regsizes
, "The size of the specific IPMI register in bytes."
1316 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1317 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1318 " the 8-bit IPMI register has to be read from a larger"
1320 module_param_array(regshifts
, int, &num_regshifts
, 0);
1321 MODULE_PARM_DESC(regshifts
, "The amount to shift the data read from the."
1322 " IPMI register, in bits. For instance, if the data"
1323 " is read from a 32-bit word and the IPMI data is in"
1324 " bit 8-15, then the shift would be 8");
1325 module_param_array(slave_addrs
, int, &num_slave_addrs
, 0);
1326 MODULE_PARM_DESC(slave_addrs
, "Set the default IPMB slave address for"
1327 " the controller. Normally this is 0x20, but can be"
1328 " overridden by this parm. This is an array indexed"
1329 " by interface number.");
1330 module_param_array(force_kipmid
, int, &num_force_kipmid
, 0);
1331 MODULE_PARM_DESC(force_kipmid
, "Force the kipmi daemon to be enabled (1) or"
1332 " disabled(0). Normally the IPMI driver auto-detects"
1333 " this, but the value may be overridden by this parm.");
1334 module_param(unload_when_empty
, int, 0);
1335 MODULE_PARM_DESC(unload_when_empty
, "Unload the module if no interfaces are"
1336 " specified or found, default is 1. Setting to 0"
1337 " is useful for hot add of devices using hotmod.");
1338 module_param_array(kipmid_max_busy_us
, uint
, &num_max_busy_us
, 0644);
1339 MODULE_PARM_DESC(kipmid_max_busy_us
,
1340 "Max time (in microseconds) to busy-wait for IPMI data before"
1341 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1342 " if kipmid is using up a lot of CPU time.");
1345 static void std_irq_cleanup(struct smi_info
*info
)
1347 if (info
->si_type
== SI_BT
)
1348 /* Disable the interrupt in the BT interface. */
1349 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
, 0);
1350 free_irq(info
->irq
, info
);
1353 static int std_irq_setup(struct smi_info
*info
)
1360 if (info
->si_type
== SI_BT
) {
1361 rv
= request_irq(info
->irq
,
1363 IRQF_SHARED
| IRQF_DISABLED
,
1367 /* Enable the interrupt in the BT interface. */
1368 info
->io
.outputb(&info
->io
, IPMI_BT_INTMASK_REG
,
1369 IPMI_BT_INTMASK_ENABLE_IRQ_BIT
);
1371 rv
= request_irq(info
->irq
,
1373 IRQF_SHARED
| IRQF_DISABLED
,
1377 dev_warn(info
->dev
, "%s unable to claim interrupt %d,"
1378 " running polled\n",
1379 DEVICE_NAME
, info
->irq
);
1382 info
->irq_cleanup
= std_irq_cleanup
;
1383 dev_info(info
->dev
, "Using irq %d\n", info
->irq
);
1389 static unsigned char port_inb(struct si_sm_io
*io
, unsigned int offset
)
1391 unsigned int addr
= io
->addr_data
;
1393 return inb(addr
+ (offset
* io
->regspacing
));
1396 static void port_outb(struct si_sm_io
*io
, unsigned int offset
,
1399 unsigned int addr
= io
->addr_data
;
1401 outb(b
, addr
+ (offset
* io
->regspacing
));
1404 static unsigned char port_inw(struct si_sm_io
*io
, unsigned int offset
)
1406 unsigned int addr
= io
->addr_data
;
1408 return (inw(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1411 static void port_outw(struct si_sm_io
*io
, unsigned int offset
,
1414 unsigned int addr
= io
->addr_data
;
1416 outw(b
<< io
->regshift
, addr
+ (offset
* io
->regspacing
));
1419 static unsigned char port_inl(struct si_sm_io
*io
, unsigned int offset
)
1421 unsigned int addr
= io
->addr_data
;
1423 return (inl(addr
+ (offset
* io
->regspacing
)) >> io
->regshift
) & 0xff;
1426 static void port_outl(struct si_sm_io
*io
, unsigned int offset
,
1429 unsigned int addr
= io
->addr_data
;
1431 outl(b
<< io
->regshift
, addr
+(offset
* io
->regspacing
));
1434 static void port_cleanup(struct smi_info
*info
)
1436 unsigned int addr
= info
->io
.addr_data
;
1440 for (idx
= 0; idx
< info
->io_size
; idx
++)
1441 release_region(addr
+ idx
* info
->io
.regspacing
,
1446 static int port_setup(struct smi_info
*info
)
1448 unsigned int addr
= info
->io
.addr_data
;
1454 info
->io_cleanup
= port_cleanup
;
1457 * Figure out the actual inb/inw/inl/etc routine to use based
1458 * upon the register size.
1460 switch (info
->io
.regsize
) {
1462 info
->io
.inputb
= port_inb
;
1463 info
->io
.outputb
= port_outb
;
1466 info
->io
.inputb
= port_inw
;
1467 info
->io
.outputb
= port_outw
;
1470 info
->io
.inputb
= port_inl
;
1471 info
->io
.outputb
= port_outl
;
1474 dev_warn(info
->dev
, "Invalid register size: %d\n",
1480 * Some BIOSes reserve disjoint I/O regions in their ACPI
1481 * tables. This causes problems when trying to register the
1482 * entire I/O region. Therefore we must register each I/O
1485 for (idx
= 0; idx
< info
->io_size
; idx
++) {
1486 if (request_region(addr
+ idx
* info
->io
.regspacing
,
1487 info
->io
.regsize
, DEVICE_NAME
) == NULL
) {
1488 /* Undo allocations */
1490 release_region(addr
+ idx
* info
->io
.regspacing
,
1499 static unsigned char intf_mem_inb(struct si_sm_io
*io
, unsigned int offset
)
1501 return readb((io
->addr
)+(offset
* io
->regspacing
));
1504 static void intf_mem_outb(struct si_sm_io
*io
, unsigned int offset
,
1507 writeb(b
, (io
->addr
)+(offset
* io
->regspacing
));
1510 static unsigned char intf_mem_inw(struct si_sm_io
*io
, unsigned int offset
)
1512 return (readw((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1516 static void intf_mem_outw(struct si_sm_io
*io
, unsigned int offset
,
1519 writeb(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1522 static unsigned char intf_mem_inl(struct si_sm_io
*io
, unsigned int offset
)
1524 return (readl((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1528 static void intf_mem_outl(struct si_sm_io
*io
, unsigned int offset
,
1531 writel(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1535 static unsigned char mem_inq(struct si_sm_io
*io
, unsigned int offset
)
1537 return (readq((io
->addr
)+(offset
* io
->regspacing
)) >> io
->regshift
)
1541 static void mem_outq(struct si_sm_io
*io
, unsigned int offset
,
1544 writeq(b
<< io
->regshift
, (io
->addr
)+(offset
* io
->regspacing
));
1548 static void mem_cleanup(struct smi_info
*info
)
1550 unsigned long addr
= info
->io
.addr_data
;
1553 if (info
->io
.addr
) {
1554 iounmap(info
->io
.addr
);
1556 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1557 - (info
->io
.regspacing
- info
->io
.regsize
));
1559 release_mem_region(addr
, mapsize
);
1563 static int mem_setup(struct smi_info
*info
)
1565 unsigned long addr
= info
->io
.addr_data
;
1571 info
->io_cleanup
= mem_cleanup
;
1574 * Figure out the actual readb/readw/readl/etc routine to use based
1575 * upon the register size.
1577 switch (info
->io
.regsize
) {
1579 info
->io
.inputb
= intf_mem_inb
;
1580 info
->io
.outputb
= intf_mem_outb
;
1583 info
->io
.inputb
= intf_mem_inw
;
1584 info
->io
.outputb
= intf_mem_outw
;
1587 info
->io
.inputb
= intf_mem_inl
;
1588 info
->io
.outputb
= intf_mem_outl
;
1592 info
->io
.inputb
= mem_inq
;
1593 info
->io
.outputb
= mem_outq
;
1597 dev_warn(info
->dev
, "Invalid register size: %d\n",
1603 * Calculate the total amount of memory to claim. This is an
1604 * unusual looking calculation, but it avoids claiming any
1605 * more memory than it has to. It will claim everything
1606 * between the first address to the end of the last full
1609 mapsize
= ((info
->io_size
* info
->io
.regspacing
)
1610 - (info
->io
.regspacing
- info
->io
.regsize
));
1612 if (request_mem_region(addr
, mapsize
, DEVICE_NAME
) == NULL
)
1615 info
->io
.addr
= ioremap(addr
, mapsize
);
1616 if (info
->io
.addr
== NULL
) {
1617 release_mem_region(addr
, mapsize
);
1624 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1625 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1633 enum hotmod_op
{ HM_ADD
, HM_REMOVE
};
1634 struct hotmod_vals
{
1638 static struct hotmod_vals hotmod_ops
[] = {
1640 { "remove", HM_REMOVE
},
1643 static struct hotmod_vals hotmod_si
[] = {
1645 { "smic", SI_SMIC
},
1649 static struct hotmod_vals hotmod_as
[] = {
1650 { "mem", IPMI_MEM_ADDR_SPACE
},
1651 { "i/o", IPMI_IO_ADDR_SPACE
},
1655 static int parse_str(struct hotmod_vals
*v
, int *val
, char *name
, char **curr
)
1660 s
= strchr(*curr
, ',');
1662 printk(KERN_WARNING PFX
"No hotmod %s given.\n", name
);
1667 for (i
= 0; hotmod_ops
[i
].name
; i
++) {
1668 if (strcmp(*curr
, v
[i
].name
) == 0) {
1675 printk(KERN_WARNING PFX
"Invalid hotmod %s '%s'\n", name
, *curr
);
1679 static int check_hotmod_int_op(const char *curr
, const char *option
,
1680 const char *name
, int *val
)
1684 if (strcmp(curr
, name
) == 0) {
1686 printk(KERN_WARNING PFX
1687 "No option given for '%s'\n",
1691 *val
= simple_strtoul(option
, &n
, 0);
1692 if ((*n
!= '\0') || (*option
== '\0')) {
1693 printk(KERN_WARNING PFX
1694 "Bad option given for '%s'\n",
1703 static struct smi_info
*smi_info_alloc(void)
1705 struct smi_info
*info
= kzalloc(sizeof(*info
), GFP_KERNEL
);
1708 spin_lock_init(&info
->si_lock
);
1712 static int hotmod_handler(const char *val
, struct kernel_param
*kp
)
1714 char *str
= kstrdup(val
, GFP_KERNEL
);
1716 char *next
, *curr
, *s
, *n
, *o
;
1718 enum si_type si_type
;
1728 struct smi_info
*info
;
1733 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1736 while ((ival
>= 0) && isspace(str
[ival
])) {
1741 for (curr
= str
; curr
; curr
= next
) {
1746 ipmb
= 0; /* Choose the default if not specified */
1748 next
= strchr(curr
, ':');
1754 rv
= parse_str(hotmod_ops
, &ival
, "operation", &curr
);
1759 rv
= parse_str(hotmod_si
, &ival
, "interface type", &curr
);
1764 rv
= parse_str(hotmod_as
, &addr_space
, "address space", &curr
);
1768 s
= strchr(curr
, ',');
1773 addr
= simple_strtoul(curr
, &n
, 0);
1774 if ((*n
!= '\0') || (*curr
== '\0')) {
1775 printk(KERN_WARNING PFX
"Invalid hotmod address"
1782 s
= strchr(curr
, ',');
1787 o
= strchr(curr
, '=');
1792 rv
= check_hotmod_int_op(curr
, o
, "rsp", ®spacing
);
1797 rv
= check_hotmod_int_op(curr
, o
, "rsi", ®size
);
1802 rv
= check_hotmod_int_op(curr
, o
, "rsh", ®shift
);
1807 rv
= check_hotmod_int_op(curr
, o
, "irq", &irq
);
1812 rv
= check_hotmod_int_op(curr
, o
, "ipmb", &ipmb
);
1819 printk(KERN_WARNING PFX
1820 "Invalid hotmod option '%s'\n",
1826 info
= smi_info_alloc();
1832 info
->addr_source
= SI_HOTMOD
;
1833 info
->si_type
= si_type
;
1834 info
->io
.addr_data
= addr
;
1835 info
->io
.addr_type
= addr_space
;
1836 if (addr_space
== IPMI_MEM_ADDR_SPACE
)
1837 info
->io_setup
= mem_setup
;
1839 info
->io_setup
= port_setup
;
1841 info
->io
.addr
= NULL
;
1842 info
->io
.regspacing
= regspacing
;
1843 if (!info
->io
.regspacing
)
1844 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1845 info
->io
.regsize
= regsize
;
1846 if (!info
->io
.regsize
)
1847 info
->io
.regsize
= DEFAULT_REGSPACING
;
1848 info
->io
.regshift
= regshift
;
1851 info
->irq_setup
= std_irq_setup
;
1852 info
->slave_addr
= ipmb
;
1854 if (!add_smi(info
)) {
1855 if (try_smi_init(info
))
1856 cleanup_one_si(info
);
1862 struct smi_info
*e
, *tmp_e
;
1864 mutex_lock(&smi_infos_lock
);
1865 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
) {
1866 if (e
->io
.addr_type
!= addr_space
)
1868 if (e
->si_type
!= si_type
)
1870 if (e
->io
.addr_data
== addr
)
1873 mutex_unlock(&smi_infos_lock
);
1882 static int hardcode_find_bmc(void)
1886 struct smi_info
*info
;
1888 for (i
= 0; i
< SI_MAX_PARMS
; i
++) {
1889 if (!ports
[i
] && !addrs
[i
])
1892 info
= smi_info_alloc();
1896 info
->addr_source
= SI_HARDCODED
;
1897 printk(KERN_INFO PFX
"probing via hardcoded address\n");
1899 if (!si_type
[i
] || strcmp(si_type
[i
], "kcs") == 0) {
1900 info
->si_type
= SI_KCS
;
1901 } else if (strcmp(si_type
[i
], "smic") == 0) {
1902 info
->si_type
= SI_SMIC
;
1903 } else if (strcmp(si_type
[i
], "bt") == 0) {
1904 info
->si_type
= SI_BT
;
1906 printk(KERN_WARNING PFX
"Interface type specified "
1907 "for interface %d, was invalid: %s\n",
1915 info
->io_setup
= port_setup
;
1916 info
->io
.addr_data
= ports
[i
];
1917 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
1918 } else if (addrs
[i
]) {
1920 info
->io_setup
= mem_setup
;
1921 info
->io
.addr_data
= addrs
[i
];
1922 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
1924 printk(KERN_WARNING PFX
"Interface type specified "
1925 "for interface %d, but port and address were "
1926 "not set or set to zero.\n", i
);
1931 info
->io
.addr
= NULL
;
1932 info
->io
.regspacing
= regspacings
[i
];
1933 if (!info
->io
.regspacing
)
1934 info
->io
.regspacing
= DEFAULT_REGSPACING
;
1935 info
->io
.regsize
= regsizes
[i
];
1936 if (!info
->io
.regsize
)
1937 info
->io
.regsize
= DEFAULT_REGSPACING
;
1938 info
->io
.regshift
= regshifts
[i
];
1939 info
->irq
= irqs
[i
];
1941 info
->irq_setup
= std_irq_setup
;
1942 info
->slave_addr
= slave_addrs
[i
];
1944 if (!add_smi(info
)) {
1945 if (try_smi_init(info
))
1946 cleanup_one_si(info
);
1957 #include <linux/acpi.h>
1960 * Once we get an ACPI failure, we don't try any more, because we go
1961 * through the tables sequentially. Once we don't find a table, there
1964 static int acpi_failure
;
1966 /* For GPE-type interrupts. */
1967 static u32
ipmi_acpi_gpe(acpi_handle gpe_device
,
1968 u32 gpe_number
, void *context
)
1970 struct smi_info
*smi_info
= context
;
1971 unsigned long flags
;
1976 spin_lock_irqsave(&(smi_info
->si_lock
), flags
);
1978 smi_inc_stat(smi_info
, interrupts
);
1981 do_gettimeofday(&t
);
1982 printk("**ACPI_GPE: %d.%9.9d\n", t
.tv_sec
, t
.tv_usec
);
1984 smi_event_handler(smi_info
, 0);
1985 spin_unlock_irqrestore(&(smi_info
->si_lock
), flags
);
1987 return ACPI_INTERRUPT_HANDLED
;
1990 static void acpi_gpe_irq_cleanup(struct smi_info
*info
)
1995 acpi_remove_gpe_handler(NULL
, info
->irq
, &ipmi_acpi_gpe
);
1998 static int acpi_gpe_irq_setup(struct smi_info
*info
)
2005 /* FIXME - is level triggered right? */
2006 status
= acpi_install_gpe_handler(NULL
,
2008 ACPI_GPE_LEVEL_TRIGGERED
,
2011 if (status
!= AE_OK
) {
2012 dev_warn(info
->dev
, "%s unable to claim ACPI GPE %d,"
2013 " running polled\n", DEVICE_NAME
, info
->irq
);
2017 info
->irq_cleanup
= acpi_gpe_irq_cleanup
;
2018 dev_info(info
->dev
, "Using ACPI GPE %d\n", info
->irq
);
2025 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
2036 s8 CreatorRevision
[4];
2039 s16 SpecificationRevision
;
2042 * Bit 0 - SCI interrupt supported
2043 * Bit 1 - I/O APIC/SAPIC
2048 * If bit 0 of InterruptType is set, then this is the SCI
2049 * interrupt in the GPEx_STS register.
2056 * If bit 1 of InterruptType is set, then this is the I/O
2057 * APIC/SAPIC interrupt.
2059 u32 GlobalSystemInterrupt
;
2061 /* The actual register address. */
2062 struct acpi_generic_address addr
;
2066 s8 spmi_id
[1]; /* A '\0' terminated array starts here. */
2069 static int try_init_spmi(struct SPMITable
*spmi
)
2071 struct smi_info
*info
;
2073 if (spmi
->IPMIlegacy
!= 1) {
2074 printk(KERN_INFO PFX
"Bad SPMI legacy %d\n", spmi
->IPMIlegacy
);
2078 info
= smi_info_alloc();
2080 printk(KERN_ERR PFX
"Could not allocate SI data (3)\n");
2084 info
->addr_source
= SI_SPMI
;
2085 printk(KERN_INFO PFX
"probing via SPMI\n");
2087 /* Figure out the interface type. */
2088 switch (spmi
->InterfaceType
) {
2090 info
->si_type
= SI_KCS
;
2093 info
->si_type
= SI_SMIC
;
2096 info
->si_type
= SI_BT
;
2099 printk(KERN_INFO PFX
"Unknown ACPI/SPMI SI type %d\n",
2100 spmi
->InterfaceType
);
2105 if (spmi
->InterruptType
& 1) {
2106 /* We've got a GPE interrupt. */
2107 info
->irq
= spmi
->GPE
;
2108 info
->irq_setup
= acpi_gpe_irq_setup
;
2109 } else if (spmi
->InterruptType
& 2) {
2110 /* We've got an APIC/SAPIC interrupt. */
2111 info
->irq
= spmi
->GlobalSystemInterrupt
;
2112 info
->irq_setup
= std_irq_setup
;
2114 /* Use the default interrupt setting. */
2116 info
->irq_setup
= NULL
;
2119 if (spmi
->addr
.bit_width
) {
2120 /* A (hopefully) properly formed register bit width. */
2121 info
->io
.regspacing
= spmi
->addr
.bit_width
/ 8;
2123 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2125 info
->io
.regsize
= info
->io
.regspacing
;
2126 info
->io
.regshift
= spmi
->addr
.bit_offset
;
2128 if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
) {
2129 info
->io_setup
= mem_setup
;
2130 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2131 } else if (spmi
->addr
.space_id
== ACPI_ADR_SPACE_SYSTEM_IO
) {
2132 info
->io_setup
= port_setup
;
2133 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2136 printk(KERN_WARNING PFX
"Unknown ACPI I/O Address type\n");
2139 info
->io
.addr_data
= spmi
->addr
.address
;
2141 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2142 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2143 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2152 static void spmi_find_bmc(void)
2155 struct SPMITable
*spmi
;
2164 for (i
= 0; ; i
++) {
2165 status
= acpi_get_table(ACPI_SIG_SPMI
, i
+1,
2166 (struct acpi_table_header
**)&spmi
);
2167 if (status
!= AE_OK
)
2170 try_init_spmi(spmi
);
2174 static int ipmi_pnp_probe(struct pnp_dev
*dev
,
2175 const struct pnp_device_id
*dev_id
)
2177 struct acpi_device
*acpi_dev
;
2178 struct smi_info
*info
;
2179 struct resource
*res
, *res_second
;
2182 unsigned long long tmp
;
2184 acpi_dev
= pnp_acpi_device(dev
);
2188 info
= smi_info_alloc();
2192 info
->addr_source
= SI_ACPI
;
2193 printk(KERN_INFO PFX
"probing via ACPI\n");
2195 handle
= acpi_dev
->handle
;
2196 info
->addr_info
.acpi_info
.acpi_handle
= handle
;
2198 /* _IFT tells us the interface type: KCS, BT, etc */
2199 status
= acpi_evaluate_integer(handle
, "_IFT", NULL
, &tmp
);
2200 if (ACPI_FAILURE(status
))
2205 info
->si_type
= SI_KCS
;
2208 info
->si_type
= SI_SMIC
;
2211 info
->si_type
= SI_BT
;
2214 dev_info(&dev
->dev
, "unknown IPMI type %lld\n", tmp
);
2218 res
= pnp_get_resource(dev
, IORESOURCE_IO
, 0);
2220 info
->io_setup
= port_setup
;
2221 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2223 res
= pnp_get_resource(dev
, IORESOURCE_MEM
, 0);
2225 info
->io_setup
= mem_setup
;
2226 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2230 dev_err(&dev
->dev
, "no I/O or memory address\n");
2233 info
->io
.addr_data
= res
->start
;
2235 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2236 res_second
= pnp_get_resource(dev
,
2237 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ?
2238 IORESOURCE_IO
: IORESOURCE_MEM
,
2241 if (res_second
->start
> info
->io
.addr_data
)
2242 info
->io
.regspacing
= res_second
->start
- info
->io
.addr_data
;
2244 info
->io
.regsize
= DEFAULT_REGSPACING
;
2245 info
->io
.regshift
= 0;
2247 /* If _GPE exists, use it; otherwise use standard interrupts */
2248 status
= acpi_evaluate_integer(handle
, "_GPE", NULL
, &tmp
);
2249 if (ACPI_SUCCESS(status
)) {
2251 info
->irq_setup
= acpi_gpe_irq_setup
;
2252 } else if (pnp_irq_valid(dev
, 0)) {
2253 info
->irq
= pnp_irq(dev
, 0);
2254 info
->irq_setup
= std_irq_setup
;
2257 info
->dev
= &dev
->dev
;
2258 pnp_set_drvdata(dev
, info
);
2260 dev_info(info
->dev
, "%pR regsize %d spacing %d irq %d\n",
2261 res
, info
->io
.regsize
, info
->io
.regspacing
,
2274 static void ipmi_pnp_remove(struct pnp_dev
*dev
)
2276 struct smi_info
*info
= pnp_get_drvdata(dev
);
2278 cleanup_one_si(info
);
2281 static const struct pnp_device_id pnp_dev_table
[] = {
2286 static struct pnp_driver ipmi_pnp_driver
= {
2287 .name
= DEVICE_NAME
,
2288 .probe
= ipmi_pnp_probe
,
2289 .remove
= ipmi_pnp_remove
,
2290 .id_table
= pnp_dev_table
,
2295 struct dmi_ipmi_data
{
2298 unsigned long base_addr
;
2304 static int decode_dmi(const struct dmi_header
*dm
,
2305 struct dmi_ipmi_data
*dmi
)
2307 const u8
*data
= (const u8
*)dm
;
2308 unsigned long base_addr
;
2310 u8 len
= dm
->length
;
2312 dmi
->type
= data
[4];
2314 memcpy(&base_addr
, data
+8, sizeof(unsigned long));
2316 if (base_addr
& 1) {
2318 base_addr
&= 0xFFFE;
2319 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2322 dmi
->addr_space
= IPMI_MEM_ADDR_SPACE
;
2324 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2326 dmi
->base_addr
= base_addr
| ((data
[0x10] & 0x10) >> 4);
2328 dmi
->irq
= data
[0x11];
2330 /* The top two bits of byte 0x10 hold the register spacing. */
2331 reg_spacing
= (data
[0x10] & 0xC0) >> 6;
2332 switch (reg_spacing
) {
2333 case 0x00: /* Byte boundaries */
2336 case 0x01: /* 32-bit boundaries */
2339 case 0x02: /* 16-byte boundaries */
2343 /* Some other interface, just ignore it. */
2349 * Note that technically, the lower bit of the base
2350 * address should be 1 if the address is I/O and 0 if
2351 * the address is in memory. So many systems get that
2352 * wrong (and all that I have seen are I/O) so we just
2353 * ignore that bit and assume I/O. Systems that use
2354 * memory should use the newer spec, anyway.
2356 dmi
->base_addr
= base_addr
& 0xfffe;
2357 dmi
->addr_space
= IPMI_IO_ADDR_SPACE
;
2361 dmi
->slave_addr
= data
[6];
2366 static void try_init_dmi(struct dmi_ipmi_data
*ipmi_data
)
2368 struct smi_info
*info
;
2370 info
= smi_info_alloc();
2372 printk(KERN_ERR PFX
"Could not allocate SI data\n");
2376 info
->addr_source
= SI_SMBIOS
;
2377 printk(KERN_INFO PFX
"probing via SMBIOS\n");
2379 switch (ipmi_data
->type
) {
2380 case 0x01: /* KCS */
2381 info
->si_type
= SI_KCS
;
2383 case 0x02: /* SMIC */
2384 info
->si_type
= SI_SMIC
;
2387 info
->si_type
= SI_BT
;
2394 switch (ipmi_data
->addr_space
) {
2395 case IPMI_MEM_ADDR_SPACE
:
2396 info
->io_setup
= mem_setup
;
2397 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2400 case IPMI_IO_ADDR_SPACE
:
2401 info
->io_setup
= port_setup
;
2402 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2407 printk(KERN_WARNING PFX
"Unknown SMBIOS I/O Address type: %d\n",
2408 ipmi_data
->addr_space
);
2411 info
->io
.addr_data
= ipmi_data
->base_addr
;
2413 info
->io
.regspacing
= ipmi_data
->offset
;
2414 if (!info
->io
.regspacing
)
2415 info
->io
.regspacing
= DEFAULT_REGSPACING
;
2416 info
->io
.regsize
= DEFAULT_REGSPACING
;
2417 info
->io
.regshift
= 0;
2419 info
->slave_addr
= ipmi_data
->slave_addr
;
2421 info
->irq
= ipmi_data
->irq
;
2423 info
->irq_setup
= std_irq_setup
;
2425 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2426 (info
->io
.addr_type
== IPMI_IO_ADDR_SPACE
) ? "io" : "mem",
2427 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2434 static void dmi_find_bmc(void)
2436 const struct dmi_device
*dev
= NULL
;
2437 struct dmi_ipmi_data data
;
2440 while ((dev
= dmi_find_device(DMI_DEV_TYPE_IPMI
, NULL
, dev
))) {
2441 memset(&data
, 0, sizeof(data
));
2442 rv
= decode_dmi((const struct dmi_header
*) dev
->device_data
,
2445 try_init_dmi(&data
);
2448 #endif /* CONFIG_DMI */
2452 #define PCI_ERMC_CLASSCODE 0x0C0700
2453 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2454 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2455 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2456 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2457 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2459 #define PCI_HP_VENDOR_ID 0x103C
2460 #define PCI_MMC_DEVICE_ID 0x121A
2461 #define PCI_MMC_ADDR_CW 0x10
2463 static void ipmi_pci_cleanup(struct smi_info
*info
)
2465 struct pci_dev
*pdev
= info
->addr_source_data
;
2467 pci_disable_device(pdev
);
2470 static int ipmi_pci_probe_regspacing(struct smi_info
*info
)
2472 if (info
->si_type
== SI_KCS
) {
2473 unsigned char status
;
2476 info
->io
.regsize
= DEFAULT_REGSIZE
;
2477 info
->io
.regshift
= 0;
2479 info
->handlers
= &kcs_smi_handlers
;
2481 /* detect 1, 4, 16byte spacing */
2482 for (regspacing
= DEFAULT_REGSPACING
; regspacing
<= 16;) {
2483 info
->io
.regspacing
= regspacing
;
2484 if (info
->io_setup(info
)) {
2486 "Could not setup I/O space\n");
2487 return DEFAULT_REGSPACING
;
2489 /* write invalid cmd */
2490 info
->io
.outputb(&info
->io
, 1, 0x10);
2491 /* read status back */
2492 status
= info
->io
.inputb(&info
->io
, 1);
2493 info
->io_cleanup(info
);
2499 return DEFAULT_REGSPACING
;
2502 static int ipmi_pci_probe(struct pci_dev
*pdev
,
2503 const struct pci_device_id
*ent
)
2506 int class_type
= pdev
->class & PCI_ERMC_CLASSCODE_TYPE_MASK
;
2507 struct smi_info
*info
;
2509 info
= smi_info_alloc();
2513 info
->addr_source
= SI_PCI
;
2514 dev_info(&pdev
->dev
, "probing via PCI");
2516 switch (class_type
) {
2517 case PCI_ERMC_CLASSCODE_TYPE_SMIC
:
2518 info
->si_type
= SI_SMIC
;
2521 case PCI_ERMC_CLASSCODE_TYPE_KCS
:
2522 info
->si_type
= SI_KCS
;
2525 case PCI_ERMC_CLASSCODE_TYPE_BT
:
2526 info
->si_type
= SI_BT
;
2531 dev_info(&pdev
->dev
, "Unknown IPMI type: %d\n", class_type
);
2535 rv
= pci_enable_device(pdev
);
2537 dev_err(&pdev
->dev
, "couldn't enable PCI device\n");
2542 info
->addr_source_cleanup
= ipmi_pci_cleanup
;
2543 info
->addr_source_data
= pdev
;
2545 if (pci_resource_flags(pdev
, 0) & IORESOURCE_IO
) {
2546 info
->io_setup
= port_setup
;
2547 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2549 info
->io_setup
= mem_setup
;
2550 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2552 info
->io
.addr_data
= pci_resource_start(pdev
, 0);
2554 info
->io
.regspacing
= ipmi_pci_probe_regspacing(info
);
2555 info
->io
.regsize
= DEFAULT_REGSIZE
;
2556 info
->io
.regshift
= 0;
2558 info
->irq
= pdev
->irq
;
2560 info
->irq_setup
= std_irq_setup
;
2562 info
->dev
= &pdev
->dev
;
2563 pci_set_drvdata(pdev
, info
);
2565 dev_info(&pdev
->dev
, "%pR regsize %d spacing %d irq %d\n",
2566 &pdev
->resource
[0], info
->io
.regsize
, info
->io
.regspacing
,
2575 static void ipmi_pci_remove(struct pci_dev
*pdev
)
2577 struct smi_info
*info
= pci_get_drvdata(pdev
);
2578 cleanup_one_si(info
);
2581 static struct pci_device_id ipmi_pci_devices
[] = {
2582 { PCI_DEVICE(PCI_HP_VENDOR_ID
, PCI_MMC_DEVICE_ID
) },
2583 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE
, PCI_ERMC_CLASSCODE_MASK
) },
2586 MODULE_DEVICE_TABLE(pci
, ipmi_pci_devices
);
2588 static struct pci_driver ipmi_pci_driver
= {
2589 .name
= DEVICE_NAME
,
2590 .id_table
= ipmi_pci_devices
,
2591 .probe
= ipmi_pci_probe
,
2592 .remove
= ipmi_pci_remove
,
2594 #endif /* CONFIG_PCI */
2596 static struct of_device_id ipmi_match
[];
2597 static int ipmi_probe(struct platform_device
*dev
)
2600 const struct of_device_id
*match
;
2601 struct smi_info
*info
;
2602 struct resource resource
;
2603 const __be32
*regsize
, *regspacing
, *regshift
;
2604 struct device_node
*np
= dev
->dev
.of_node
;
2608 dev_info(&dev
->dev
, "probing via device tree\n");
2610 match
= of_match_device(ipmi_match
, &dev
->dev
);
2614 ret
= of_address_to_resource(np
, 0, &resource
);
2616 dev_warn(&dev
->dev
, PFX
"invalid address from OF\n");
2620 regsize
= of_get_property(np
, "reg-size", &proplen
);
2621 if (regsize
&& proplen
!= 4) {
2622 dev_warn(&dev
->dev
, PFX
"invalid regsize from OF\n");
2626 regspacing
= of_get_property(np
, "reg-spacing", &proplen
);
2627 if (regspacing
&& proplen
!= 4) {
2628 dev_warn(&dev
->dev
, PFX
"invalid regspacing from OF\n");
2632 regshift
= of_get_property(np
, "reg-shift", &proplen
);
2633 if (regshift
&& proplen
!= 4) {
2634 dev_warn(&dev
->dev
, PFX
"invalid regshift from OF\n");
2638 info
= smi_info_alloc();
2642 "could not allocate memory for OF probe\n");
2646 info
->si_type
= (enum si_type
) match
->data
;
2647 info
->addr_source
= SI_DEVICETREE
;
2648 info
->irq_setup
= std_irq_setup
;
2650 if (resource
.flags
& IORESOURCE_IO
) {
2651 info
->io_setup
= port_setup
;
2652 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
2654 info
->io_setup
= mem_setup
;
2655 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2658 info
->io
.addr_data
= resource
.start
;
2660 info
->io
.regsize
= regsize
? be32_to_cpup(regsize
) : DEFAULT_REGSIZE
;
2661 info
->io
.regspacing
= regspacing
? be32_to_cpup(regspacing
) : DEFAULT_REGSPACING
;
2662 info
->io
.regshift
= regshift
? be32_to_cpup(regshift
) : 0;
2664 info
->irq
= irq_of_parse_and_map(dev
->dev
.of_node
, 0);
2665 info
->dev
= &dev
->dev
;
2667 dev_dbg(&dev
->dev
, "addr 0x%lx regsize %d spacing %d irq %d\n",
2668 info
->io
.addr_data
, info
->io
.regsize
, info
->io
.regspacing
,
2671 dev_set_drvdata(&dev
->dev
, info
);
2673 if (add_smi(info
)) {
2681 static int ipmi_remove(struct platform_device
*dev
)
2684 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2689 static struct of_device_id ipmi_match
[] =
2691 { .type
= "ipmi", .compatible
= "ipmi-kcs",
2692 .data
= (void *)(unsigned long) SI_KCS
},
2693 { .type
= "ipmi", .compatible
= "ipmi-smic",
2694 .data
= (void *)(unsigned long) SI_SMIC
},
2695 { .type
= "ipmi", .compatible
= "ipmi-bt",
2696 .data
= (void *)(unsigned long) SI_BT
},
2700 static struct platform_driver ipmi_driver
= {
2702 .name
= DEVICE_NAME
,
2703 .owner
= THIS_MODULE
,
2704 .of_match_table
= ipmi_match
,
2706 .probe
= ipmi_probe
,
2707 .remove
= ipmi_remove
,
2710 static int wait_for_msg_done(struct smi_info
*smi_info
)
2712 enum si_sm_result smi_result
;
2714 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2716 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2717 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2718 schedule_timeout_uninterruptible(1);
2719 smi_result
= smi_info
->handlers
->event(
2720 smi_info
->si_sm
, jiffies_to_usecs(1));
2721 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2722 smi_result
= smi_info
->handlers
->event(
2723 smi_info
->si_sm
, 0);
2727 if (smi_result
== SI_SM_HOSED
)
2729 * We couldn't get the state machine to run, so whatever's at
2730 * the port is probably not an IPMI SMI interface.
2737 static int try_get_dev_id(struct smi_info
*smi_info
)
2739 unsigned char msg
[2];
2740 unsigned char *resp
;
2741 unsigned long resp_len
;
2744 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2749 * Do a Get Device ID command, since it comes back with some
2752 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2753 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2754 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2756 rv
= wait_for_msg_done(smi_info
);
2760 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2761 resp
, IPMI_MAX_MSG_LENGTH
);
2763 /* Check and record info from the get device id, in case we need it. */
2764 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2771 static int try_enable_event_buffer(struct smi_info
*smi_info
)
2773 unsigned char msg
[3];
2774 unsigned char *resp
;
2775 unsigned long resp_len
;
2778 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2782 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2783 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2784 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2786 rv
= wait_for_msg_done(smi_info
);
2788 printk(KERN_WARNING PFX
"Error getting response from get"
2789 " global enables command, the event buffer is not"
2794 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2795 resp
, IPMI_MAX_MSG_LENGTH
);
2798 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2799 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2801 printk(KERN_WARNING PFX
"Invalid return from get global"
2802 " enables command, cannot enable the event buffer.\n");
2807 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
)
2808 /* buffer is already enabled, nothing to do. */
2811 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2812 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2813 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
2814 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2816 rv
= wait_for_msg_done(smi_info
);
2818 printk(KERN_WARNING PFX
"Error getting response from set"
2819 " global, enables command, the event buffer is not"
2824 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2825 resp
, IPMI_MAX_MSG_LENGTH
);
2828 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2829 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
2830 printk(KERN_WARNING PFX
"Invalid return from get global,"
2831 "enables command, not enable the event buffer.\n");
2838 * An error when setting the event buffer bit means
2839 * that the event buffer is not supported.
2847 static int smi_type_proc_show(struct seq_file
*m
, void *v
)
2849 struct smi_info
*smi
= m
->private;
2851 return seq_printf(m
, "%s\n", si_to_str
[smi
->si_type
]);
2854 static int smi_type_proc_open(struct inode
*inode
, struct file
*file
)
2856 return single_open(file
, smi_type_proc_show
, PDE_DATA(inode
));
2859 static const struct file_operations smi_type_proc_ops
= {
2860 .open
= smi_type_proc_open
,
2862 .llseek
= seq_lseek
,
2863 .release
= single_release
,
2866 static int smi_si_stats_proc_show(struct seq_file
*m
, void *v
)
2868 struct smi_info
*smi
= m
->private;
2870 seq_printf(m
, "interrupts_enabled: %d\n",
2871 smi
->irq
&& !smi
->interrupt_disabled
);
2872 seq_printf(m
, "short_timeouts: %u\n",
2873 smi_get_stat(smi
, short_timeouts
));
2874 seq_printf(m
, "long_timeouts: %u\n",
2875 smi_get_stat(smi
, long_timeouts
));
2876 seq_printf(m
, "idles: %u\n",
2877 smi_get_stat(smi
, idles
));
2878 seq_printf(m
, "interrupts: %u\n",
2879 smi_get_stat(smi
, interrupts
));
2880 seq_printf(m
, "attentions: %u\n",
2881 smi_get_stat(smi
, attentions
));
2882 seq_printf(m
, "flag_fetches: %u\n",
2883 smi_get_stat(smi
, flag_fetches
));
2884 seq_printf(m
, "hosed_count: %u\n",
2885 smi_get_stat(smi
, hosed_count
));
2886 seq_printf(m
, "complete_transactions: %u\n",
2887 smi_get_stat(smi
, complete_transactions
));
2888 seq_printf(m
, "events: %u\n",
2889 smi_get_stat(smi
, events
));
2890 seq_printf(m
, "watchdog_pretimeouts: %u\n",
2891 smi_get_stat(smi
, watchdog_pretimeouts
));
2892 seq_printf(m
, "incoming_messages: %u\n",
2893 smi_get_stat(smi
, incoming_messages
));
2897 static int smi_si_stats_proc_open(struct inode
*inode
, struct file
*file
)
2899 return single_open(file
, smi_si_stats_proc_show
, PDE_DATA(inode
));
2902 static const struct file_operations smi_si_stats_proc_ops
= {
2903 .open
= smi_si_stats_proc_open
,
2905 .llseek
= seq_lseek
,
2906 .release
= single_release
,
2909 static int smi_params_proc_show(struct seq_file
*m
, void *v
)
2911 struct smi_info
*smi
= m
->private;
2913 return seq_printf(m
,
2914 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2915 si_to_str
[smi
->si_type
],
2916 addr_space_to_str
[smi
->io
.addr_type
],
2925 static int smi_params_proc_open(struct inode
*inode
, struct file
*file
)
2927 return single_open(file
, smi_params_proc_show
, PDE_DATA(inode
));
2930 static const struct file_operations smi_params_proc_ops
= {
2931 .open
= smi_params_proc_open
,
2933 .llseek
= seq_lseek
,
2934 .release
= single_release
,
2938 * oem_data_avail_to_receive_msg_avail
2939 * @info - smi_info structure with msg_flags set
2941 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2942 * Returns 1 indicating need to re-run handle_flags().
2944 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
2946 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
2952 * setup_dell_poweredge_oem_data_handler
2953 * @info - smi_info.device_id must be populated
2955 * Systems that match, but have firmware version < 1.40 may assert
2956 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2957 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2958 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2959 * as RECEIVE_MSG_AVAIL instead.
2961 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2962 * assert the OEM[012] bits, and if it did, the driver would have to
2963 * change to handle that properly, we don't actually check for the
2965 * Device ID = 0x20 BMC on PowerEdge 8G servers
2966 * Device Revision = 0x80
2967 * Firmware Revision1 = 0x01 BMC version 1.40
2968 * Firmware Revision2 = 0x40 BCD encoded
2969 * IPMI Version = 0x51 IPMI 1.5
2970 * Manufacturer ID = A2 02 00 Dell IANA
2972 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2973 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2976 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2977 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2978 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
2979 #define DELL_IANA_MFR_ID 0x0002a2
2980 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
2982 struct ipmi_device_id
*id
= &smi_info
->device_id
;
2983 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
2984 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
2985 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
2986 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
2987 smi_info
->oem_data_avail_handler
=
2988 oem_data_avail_to_receive_msg_avail
;
2989 } else if (ipmi_version_major(id
) < 1 ||
2990 (ipmi_version_major(id
) == 1 &&
2991 ipmi_version_minor(id
) < 5)) {
2992 smi_info
->oem_data_avail_handler
=
2993 oem_data_avail_to_receive_msg_avail
;
2998 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2999 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
3001 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
3003 /* Make it a response */
3004 msg
->rsp
[0] = msg
->data
[0] | 4;
3005 msg
->rsp
[1] = msg
->data
[1];
3006 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
3008 smi_info
->curr_msg
= NULL
;
3009 deliver_recv_msg(smi_info
, msg
);
3013 * dell_poweredge_bt_xaction_handler
3014 * @info - smi_info.device_id must be populated
3016 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3017 * not respond to a Get SDR command if the length of the data
3018 * requested is exactly 0x3A, which leads to command timeouts and no
3019 * data returned. This intercepts such commands, and causes userspace
3020 * callers to try again with a different-sized buffer, which succeeds.
3023 #define STORAGE_NETFN 0x0A
3024 #define STORAGE_CMD_GET_SDR 0x23
3025 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
3026 unsigned long unused
,
3029 struct smi_info
*smi_info
= in
;
3030 unsigned char *data
= smi_info
->curr_msg
->data
;
3031 unsigned int size
= smi_info
->curr_msg
->data_size
;
3033 (data
[0]>>2) == STORAGE_NETFN
&&
3034 data
[1] == STORAGE_CMD_GET_SDR
&&
3036 return_hosed_msg_badsize(smi_info
);
3042 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
3043 .notifier_call
= dell_poweredge_bt_xaction_handler
,
3047 * setup_dell_poweredge_bt_xaction_handler
3048 * @info - smi_info.device_id must be filled in already
3050 * Fills in smi_info.device_id.start_transaction_pre_hook
3051 * when we know what function to use there.
3054 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
3056 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3057 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
3058 smi_info
->si_type
== SI_BT
)
3059 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
3063 * setup_oem_data_handler
3064 * @info - smi_info.device_id must be filled in already
3066 * Fills in smi_info.device_id.oem_data_available_handler
3067 * when we know what function to use there.
3070 static void setup_oem_data_handler(struct smi_info
*smi_info
)
3072 setup_dell_poweredge_oem_data_handler(smi_info
);
3075 static void setup_xaction_handlers(struct smi_info
*smi_info
)
3077 setup_dell_poweredge_bt_xaction_handler(smi_info
);
3080 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
3082 if (smi_info
->intf
) {
3084 * The timer and thread are only running if the
3085 * interface has been started up and registered.
3087 if (smi_info
->thread
!= NULL
)
3088 kthread_stop(smi_info
->thread
);
3089 del_timer_sync(&smi_info
->si_timer
);
3093 static struct ipmi_default_vals
3099 { .type
= SI_KCS
, .port
= 0xca2 },
3100 { .type
= SI_SMIC
, .port
= 0xca9 },
3101 { .type
= SI_BT
, .port
= 0xe4 },
3105 static void default_find_bmc(void)
3107 struct smi_info
*info
;
3110 for (i
= 0; ; i
++) {
3111 if (!ipmi_defaults
[i
].port
)
3114 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3117 info
= smi_info_alloc();
3121 info
->addr_source
= SI_DEFAULT
;
3123 info
->si_type
= ipmi_defaults
[i
].type
;
3124 info
->io_setup
= port_setup
;
3125 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3126 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3128 info
->io
.addr
= NULL
;
3129 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3130 info
->io
.regsize
= DEFAULT_REGSPACING
;
3131 info
->io
.regshift
= 0;
3133 if (add_smi(info
) == 0) {
3134 if ((try_smi_init(info
)) == 0) {
3136 printk(KERN_INFO PFX
"Found default %s"
3137 " state machine at %s address 0x%lx\n",
3138 si_to_str
[info
->si_type
],
3139 addr_space_to_str
[info
->io
.addr_type
],
3140 info
->io
.addr_data
);
3142 cleanup_one_si(info
);
3149 static int is_new_interface(struct smi_info
*info
)
3153 list_for_each_entry(e
, &smi_infos
, link
) {
3154 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3156 if (e
->io
.addr_data
== info
->io
.addr_data
)
3163 static int add_smi(struct smi_info
*new_smi
)
3167 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3168 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3169 si_to_str
[new_smi
->si_type
]);
3170 mutex_lock(&smi_infos_lock
);
3171 if (!is_new_interface(new_smi
)) {
3172 printk(KERN_CONT
" duplicate interface\n");
3177 printk(KERN_CONT
"\n");
3179 /* So we know not to free it unless we have allocated one. */
3180 new_smi
->intf
= NULL
;
3181 new_smi
->si_sm
= NULL
;
3182 new_smi
->handlers
= NULL
;
3184 list_add_tail(&new_smi
->link
, &smi_infos
);
3187 mutex_unlock(&smi_infos_lock
);
3191 static int try_smi_init(struct smi_info
*new_smi
)
3196 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3197 " machine at %s address 0x%lx, slave address 0x%x,"
3199 ipmi_addr_src_to_str
[new_smi
->addr_source
],
3200 si_to_str
[new_smi
->si_type
],
3201 addr_space_to_str
[new_smi
->io
.addr_type
],
3202 new_smi
->io
.addr_data
,
3203 new_smi
->slave_addr
, new_smi
->irq
);
3205 switch (new_smi
->si_type
) {
3207 new_smi
->handlers
= &kcs_smi_handlers
;
3211 new_smi
->handlers
= &smic_smi_handlers
;
3215 new_smi
->handlers
= &bt_smi_handlers
;
3219 /* No support for anything else yet. */
3224 /* Allocate the state machine's data and initialize it. */
3225 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3226 if (!new_smi
->si_sm
) {
3228 "Could not allocate state machine memory\n");
3232 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3235 /* Now that we know the I/O size, we can set up the I/O. */
3236 rv
= new_smi
->io_setup(new_smi
);
3238 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3242 /* Do low-level detection first. */
3243 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3244 if (new_smi
->addr_source
)
3245 printk(KERN_INFO PFX
"Interface detection failed\n");
3251 * Attempt a get device id command. If it fails, we probably
3252 * don't have a BMC here.
3254 rv
= try_get_dev_id(new_smi
);
3256 if (new_smi
->addr_source
)
3257 printk(KERN_INFO PFX
"There appears to be no BMC"
3258 " at this location\n");
3262 setup_oem_data_handler(new_smi
);
3263 setup_xaction_handlers(new_smi
);
3265 INIT_LIST_HEAD(&(new_smi
->xmit_msgs
));
3266 INIT_LIST_HEAD(&(new_smi
->hp_xmit_msgs
));
3267 new_smi
->curr_msg
= NULL
;
3268 atomic_set(&new_smi
->req_events
, 0);
3269 new_smi
->run_to_completion
= 0;
3270 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3271 atomic_set(&new_smi
->stats
[i
], 0);
3273 new_smi
->interrupt_disabled
= 1;
3274 atomic_set(&new_smi
->stop_operation
, 0);
3275 new_smi
->intf_num
= smi_num
;
3278 rv
= try_enable_event_buffer(new_smi
);
3280 new_smi
->has_event_buffer
= 1;
3283 * Start clearing the flags before we enable interrupts or the
3284 * timer to avoid racing with the timer.
3286 start_clear_flags(new_smi
);
3287 /* IRQ is defined to be set when non-zero. */
3289 new_smi
->si_state
= SI_CLEARING_FLAGS_THEN_SET_IRQ
;
3291 if (!new_smi
->dev
) {
3293 * If we don't already have a device from something
3294 * else (like PCI), then register a new one.
3296 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3298 if (!new_smi
->pdev
) {
3300 "Unable to allocate platform device\n");
3303 new_smi
->dev
= &new_smi
->pdev
->dev
;
3304 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3306 rv
= platform_device_add(new_smi
->pdev
);
3309 "Unable to register system interface device:"
3314 new_smi
->dev_registered
= 1;
3317 rv
= ipmi_register_smi(&handlers
,
3319 &new_smi
->device_id
,
3322 new_smi
->slave_addr
);
3324 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3326 goto out_err_stop_timer
;
3329 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3333 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3334 goto out_err_stop_timer
;
3337 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3338 &smi_si_stats_proc_ops
,
3341 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3342 goto out_err_stop_timer
;
3345 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3346 &smi_params_proc_ops
,
3349 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3350 goto out_err_stop_timer
;
3353 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3354 si_to_str
[new_smi
->si_type
]);
3359 atomic_inc(&new_smi
->stop_operation
);
3360 wait_for_timer_and_thread(new_smi
);
3363 new_smi
->interrupt_disabled
= 1;
3365 if (new_smi
->intf
) {
3366 ipmi_unregister_smi(new_smi
->intf
);
3367 new_smi
->intf
= NULL
;
3370 if (new_smi
->irq_cleanup
) {
3371 new_smi
->irq_cleanup(new_smi
);
3372 new_smi
->irq_cleanup
= NULL
;
3376 * Wait until we know that we are out of any interrupt
3377 * handlers might have been running before we freed the
3380 synchronize_sched();
3382 if (new_smi
->si_sm
) {
3383 if (new_smi
->handlers
)
3384 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3385 kfree(new_smi
->si_sm
);
3386 new_smi
->si_sm
= NULL
;
3388 if (new_smi
->addr_source_cleanup
) {
3389 new_smi
->addr_source_cleanup(new_smi
);
3390 new_smi
->addr_source_cleanup
= NULL
;
3392 if (new_smi
->io_cleanup
) {
3393 new_smi
->io_cleanup(new_smi
);
3394 new_smi
->io_cleanup
= NULL
;
3397 if (new_smi
->dev_registered
) {
3398 platform_device_unregister(new_smi
->pdev
);
3399 new_smi
->dev_registered
= 0;
3405 static int init_ipmi_si(void)
3411 enum ipmi_addr_src type
= SI_INVALID
;
3417 if (si_tryplatform
) {
3418 rv
= platform_driver_register(&ipmi_driver
);
3420 printk(KERN_ERR PFX
"Unable to register "
3421 "driver: %d\n", rv
);
3426 /* Parse out the si_type string into its components. */
3429 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3431 str
= strchr(str
, ',');
3441 printk(KERN_INFO
"IPMI System Interface driver.\n");
3443 /* If the user gave us a device, they presumably want us to use it */
3444 if (!hardcode_find_bmc())
3449 rv
= pci_register_driver(&ipmi_pci_driver
);
3451 printk(KERN_ERR PFX
"Unable to register "
3452 "PCI driver: %d\n", rv
);
3460 pnp_register_driver(&ipmi_pnp_driver
);
3475 /* We prefer devices with interrupts, but in the case of a machine
3476 with multiple BMCs we assume that there will be several instances
3477 of a given type so if we succeed in registering a type then also
3478 try to register everything else of the same type */
3480 mutex_lock(&smi_infos_lock
);
3481 list_for_each_entry(e
, &smi_infos
, link
) {
3482 /* Try to register a device if it has an IRQ and we either
3483 haven't successfully registered a device yet or this
3484 device has the same type as one we successfully registered */
3485 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3486 if (!try_smi_init(e
)) {
3487 type
= e
->addr_source
;
3492 /* type will only have been set if we successfully registered an si */
3494 mutex_unlock(&smi_infos_lock
);
3498 /* Fall back to the preferred device */
3500 list_for_each_entry(e
, &smi_infos
, link
) {
3501 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3502 if (!try_smi_init(e
)) {
3503 type
= e
->addr_source
;
3507 mutex_unlock(&smi_infos_lock
);
3512 if (si_trydefaults
) {
3513 mutex_lock(&smi_infos_lock
);
3514 if (list_empty(&smi_infos
)) {
3515 /* No BMC was found, try defaults. */
3516 mutex_unlock(&smi_infos_lock
);
3519 mutex_unlock(&smi_infos_lock
);
3522 mutex_lock(&smi_infos_lock
);
3523 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3524 mutex_unlock(&smi_infos_lock
);
3526 printk(KERN_WARNING PFX
3527 "Unable to find any System Interface(s)\n");
3530 mutex_unlock(&smi_infos_lock
);
3534 module_init(init_ipmi_si
);
3536 static void cleanup_one_si(struct smi_info
*to_clean
)
3539 unsigned long flags
;
3544 list_del(&to_clean
->link
);
3546 /* Tell the driver that we are shutting down. */
3547 atomic_inc(&to_clean
->stop_operation
);
3550 * Make sure the timer and thread are stopped and will not run
3553 wait_for_timer_and_thread(to_clean
);
3556 * Timeouts are stopped, now make sure the interrupts are off
3557 * for the device. A little tricky with locks to make sure
3558 * there are no races.
3560 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3561 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3562 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3564 schedule_timeout_uninterruptible(1);
3565 spin_lock_irqsave(&to_clean
->si_lock
, flags
);
3567 disable_si_irq(to_clean
);
3568 spin_unlock_irqrestore(&to_clean
->si_lock
, flags
);
3569 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3571 schedule_timeout_uninterruptible(1);
3574 /* Clean up interrupts and make sure that everything is done. */
3575 if (to_clean
->irq_cleanup
)
3576 to_clean
->irq_cleanup(to_clean
);
3577 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3579 schedule_timeout_uninterruptible(1);
3583 rv
= ipmi_unregister_smi(to_clean
->intf
);
3586 printk(KERN_ERR PFX
"Unable to unregister device: errno=%d\n",
3590 if (to_clean
->handlers
)
3591 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3593 kfree(to_clean
->si_sm
);
3595 if (to_clean
->addr_source_cleanup
)
3596 to_clean
->addr_source_cleanup(to_clean
);
3597 if (to_clean
->io_cleanup
)
3598 to_clean
->io_cleanup(to_clean
);
3600 if (to_clean
->dev_registered
)
3601 platform_device_unregister(to_clean
->pdev
);
3606 static void cleanup_ipmi_si(void)
3608 struct smi_info
*e
, *tmp_e
;
3615 pci_unregister_driver(&ipmi_pci_driver
);
3619 pnp_unregister_driver(&ipmi_pnp_driver
);
3622 platform_driver_unregister(&ipmi_driver
);
3624 mutex_lock(&smi_infos_lock
);
3625 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3627 mutex_unlock(&smi_infos_lock
);
3629 module_exit(cleanup_ipmi_si
);
3631 MODULE_LICENSE("GPL");
3632 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3633 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3634 " system interfaces.");