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 .of_match_table
= ipmi_match
,
2793 .probe
= ipmi_probe
,
2794 .remove
= ipmi_remove
,
2797 #ifdef CONFIG_PARISC
2798 static int ipmi_parisc_probe(struct parisc_device
*dev
)
2800 struct smi_info
*info
;
2803 info
= smi_info_alloc();
2807 "could not allocate memory for PARISC probe\n");
2811 info
->si_type
= SI_KCS
;
2812 info
->addr_source
= SI_DEVICETREE
;
2813 info
->io_setup
= mem_setup
;
2814 info
->io
.addr_type
= IPMI_MEM_ADDR_SPACE
;
2815 info
->io
.addr_data
= dev
->hpa
.start
;
2816 info
->io
.regsize
= 1;
2817 info
->io
.regspacing
= 1;
2818 info
->io
.regshift
= 0;
2819 info
->irq
= 0; /* no interrupt */
2820 info
->irq_setup
= NULL
;
2821 info
->dev
= &dev
->dev
;
2823 dev_dbg(&dev
->dev
, "addr 0x%lx\n", info
->io
.addr_data
);
2825 dev_set_drvdata(&dev
->dev
, info
);
2836 static int ipmi_parisc_remove(struct parisc_device
*dev
)
2838 cleanup_one_si(dev_get_drvdata(&dev
->dev
));
2842 static struct parisc_device_id ipmi_parisc_tbl
[] = {
2843 { HPHW_MC
, HVERSION_REV_ANY_ID
, 0x004, 0xC0 },
2847 static struct parisc_driver ipmi_parisc_driver
= {
2849 .id_table
= ipmi_parisc_tbl
,
2850 .probe
= ipmi_parisc_probe
,
2851 .remove
= ipmi_parisc_remove
,
2853 #endif /* CONFIG_PARISC */
2855 static int wait_for_msg_done(struct smi_info
*smi_info
)
2857 enum si_sm_result smi_result
;
2859 smi_result
= smi_info
->handlers
->event(smi_info
->si_sm
, 0);
2861 if (smi_result
== SI_SM_CALL_WITH_DELAY
||
2862 smi_result
== SI_SM_CALL_WITH_TICK_DELAY
) {
2863 schedule_timeout_uninterruptible(1);
2864 smi_result
= smi_info
->handlers
->event(
2865 smi_info
->si_sm
, jiffies_to_usecs(1));
2866 } else if (smi_result
== SI_SM_CALL_WITHOUT_DELAY
) {
2867 smi_result
= smi_info
->handlers
->event(
2868 smi_info
->si_sm
, 0);
2872 if (smi_result
== SI_SM_HOSED
)
2874 * We couldn't get the state machine to run, so whatever's at
2875 * the port is probably not an IPMI SMI interface.
2882 static int try_get_dev_id(struct smi_info
*smi_info
)
2884 unsigned char msg
[2];
2885 unsigned char *resp
;
2886 unsigned long resp_len
;
2889 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2894 * Do a Get Device ID command, since it comes back with some
2897 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2898 msg
[1] = IPMI_GET_DEVICE_ID_CMD
;
2899 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2901 rv
= wait_for_msg_done(smi_info
);
2905 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2906 resp
, IPMI_MAX_MSG_LENGTH
);
2908 /* Check and record info from the get device id, in case we need it. */
2909 rv
= ipmi_demangle_device_id(resp
, resp_len
, &smi_info
->device_id
);
2916 static int try_enable_event_buffer(struct smi_info
*smi_info
)
2918 unsigned char msg
[3];
2919 unsigned char *resp
;
2920 unsigned long resp_len
;
2923 resp
= kmalloc(IPMI_MAX_MSG_LENGTH
, GFP_KERNEL
);
2927 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2928 msg
[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD
;
2929 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 2);
2931 rv
= wait_for_msg_done(smi_info
);
2933 printk(KERN_WARNING PFX
"Error getting response from get"
2934 " global enables command, the event buffer is not"
2939 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2940 resp
, IPMI_MAX_MSG_LENGTH
);
2943 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2944 resp
[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD
||
2946 printk(KERN_WARNING PFX
"Invalid return from get global"
2947 " enables command, cannot enable the event buffer.\n");
2952 if (resp
[3] & IPMI_BMC_EVT_MSG_BUFF
) {
2953 /* buffer is already enabled, nothing to do. */
2954 smi_info
->supports_event_msg_buff
= true;
2958 msg
[0] = IPMI_NETFN_APP_REQUEST
<< 2;
2959 msg
[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD
;
2960 msg
[2] = resp
[3] | IPMI_BMC_EVT_MSG_BUFF
;
2961 smi_info
->handlers
->start_transaction(smi_info
->si_sm
, msg
, 3);
2963 rv
= wait_for_msg_done(smi_info
);
2965 printk(KERN_WARNING PFX
"Error getting response from set"
2966 " global, enables command, the event buffer is not"
2971 resp_len
= smi_info
->handlers
->get_result(smi_info
->si_sm
,
2972 resp
, IPMI_MAX_MSG_LENGTH
);
2975 resp
[0] != (IPMI_NETFN_APP_REQUEST
| 1) << 2 ||
2976 resp
[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD
) {
2977 printk(KERN_WARNING PFX
"Invalid return from get global,"
2978 "enables command, not enable the event buffer.\n");
2985 * An error when setting the event buffer bit means
2986 * that the event buffer is not supported.
2990 smi_info
->supports_event_msg_buff
= true;
2997 static int smi_type_proc_show(struct seq_file
*m
, void *v
)
2999 struct smi_info
*smi
= m
->private;
3001 return seq_printf(m
, "%s\n", si_to_str
[smi
->si_type
]);
3004 static int smi_type_proc_open(struct inode
*inode
, struct file
*file
)
3006 return single_open(file
, smi_type_proc_show
, PDE_DATA(inode
));
3009 static const struct file_operations smi_type_proc_ops
= {
3010 .open
= smi_type_proc_open
,
3012 .llseek
= seq_lseek
,
3013 .release
= single_release
,
3016 static int smi_si_stats_proc_show(struct seq_file
*m
, void *v
)
3018 struct smi_info
*smi
= m
->private;
3020 seq_printf(m
, "interrupts_enabled: %d\n",
3021 smi
->irq
&& !smi
->interrupt_disabled
);
3022 seq_printf(m
, "short_timeouts: %u\n",
3023 smi_get_stat(smi
, short_timeouts
));
3024 seq_printf(m
, "long_timeouts: %u\n",
3025 smi_get_stat(smi
, long_timeouts
));
3026 seq_printf(m
, "idles: %u\n",
3027 smi_get_stat(smi
, idles
));
3028 seq_printf(m
, "interrupts: %u\n",
3029 smi_get_stat(smi
, interrupts
));
3030 seq_printf(m
, "attentions: %u\n",
3031 smi_get_stat(smi
, attentions
));
3032 seq_printf(m
, "flag_fetches: %u\n",
3033 smi_get_stat(smi
, flag_fetches
));
3034 seq_printf(m
, "hosed_count: %u\n",
3035 smi_get_stat(smi
, hosed_count
));
3036 seq_printf(m
, "complete_transactions: %u\n",
3037 smi_get_stat(smi
, complete_transactions
));
3038 seq_printf(m
, "events: %u\n",
3039 smi_get_stat(smi
, events
));
3040 seq_printf(m
, "watchdog_pretimeouts: %u\n",
3041 smi_get_stat(smi
, watchdog_pretimeouts
));
3042 seq_printf(m
, "incoming_messages: %u\n",
3043 smi_get_stat(smi
, incoming_messages
));
3047 static int smi_si_stats_proc_open(struct inode
*inode
, struct file
*file
)
3049 return single_open(file
, smi_si_stats_proc_show
, PDE_DATA(inode
));
3052 static const struct file_operations smi_si_stats_proc_ops
= {
3053 .open
= smi_si_stats_proc_open
,
3055 .llseek
= seq_lseek
,
3056 .release
= single_release
,
3059 static int smi_params_proc_show(struct seq_file
*m
, void *v
)
3061 struct smi_info
*smi
= m
->private;
3063 return seq_printf(m
,
3064 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
3065 si_to_str
[smi
->si_type
],
3066 addr_space_to_str
[smi
->io
.addr_type
],
3075 static int smi_params_proc_open(struct inode
*inode
, struct file
*file
)
3077 return single_open(file
, smi_params_proc_show
, PDE_DATA(inode
));
3080 static const struct file_operations smi_params_proc_ops
= {
3081 .open
= smi_params_proc_open
,
3083 .llseek
= seq_lseek
,
3084 .release
= single_release
,
3088 * oem_data_avail_to_receive_msg_avail
3089 * @info - smi_info structure with msg_flags set
3091 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
3092 * Returns 1 indicating need to re-run handle_flags().
3094 static int oem_data_avail_to_receive_msg_avail(struct smi_info
*smi_info
)
3096 smi_info
->msg_flags
= ((smi_info
->msg_flags
& ~OEM_DATA_AVAIL
) |
3102 * setup_dell_poweredge_oem_data_handler
3103 * @info - smi_info.device_id must be populated
3105 * Systems that match, but have firmware version < 1.40 may assert
3106 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3107 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3108 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3109 * as RECEIVE_MSG_AVAIL instead.
3111 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3112 * assert the OEM[012] bits, and if it did, the driver would have to
3113 * change to handle that properly, we don't actually check for the
3115 * Device ID = 0x20 BMC on PowerEdge 8G servers
3116 * Device Revision = 0x80
3117 * Firmware Revision1 = 0x01 BMC version 1.40
3118 * Firmware Revision2 = 0x40 BCD encoded
3119 * IPMI Version = 0x51 IPMI 1.5
3120 * Manufacturer ID = A2 02 00 Dell IANA
3122 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3123 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3126 #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3127 #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3128 #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
3129 #define DELL_IANA_MFR_ID 0x0002a2
3130 static void setup_dell_poweredge_oem_data_handler(struct smi_info
*smi_info
)
3132 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3133 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
) {
3134 if (id
->device_id
== DELL_POWEREDGE_8G_BMC_DEVICE_ID
&&
3135 id
->device_revision
== DELL_POWEREDGE_8G_BMC_DEVICE_REV
&&
3136 id
->ipmi_version
== DELL_POWEREDGE_8G_BMC_IPMI_VERSION
) {
3137 smi_info
->oem_data_avail_handler
=
3138 oem_data_avail_to_receive_msg_avail
;
3139 } else if (ipmi_version_major(id
) < 1 ||
3140 (ipmi_version_major(id
) == 1 &&
3141 ipmi_version_minor(id
) < 5)) {
3142 smi_info
->oem_data_avail_handler
=
3143 oem_data_avail_to_receive_msg_avail
;
3148 #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3149 static void return_hosed_msg_badsize(struct smi_info
*smi_info
)
3151 struct ipmi_smi_msg
*msg
= smi_info
->curr_msg
;
3153 /* Make it a response */
3154 msg
->rsp
[0] = msg
->data
[0] | 4;
3155 msg
->rsp
[1] = msg
->data
[1];
3156 msg
->rsp
[2] = CANNOT_RETURN_REQUESTED_LENGTH
;
3158 smi_info
->curr_msg
= NULL
;
3159 deliver_recv_msg(smi_info
, msg
);
3163 * dell_poweredge_bt_xaction_handler
3164 * @info - smi_info.device_id must be populated
3166 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3167 * not respond to a Get SDR command if the length of the data
3168 * requested is exactly 0x3A, which leads to command timeouts and no
3169 * data returned. This intercepts such commands, and causes userspace
3170 * callers to try again with a different-sized buffer, which succeeds.
3173 #define STORAGE_NETFN 0x0A
3174 #define STORAGE_CMD_GET_SDR 0x23
3175 static int dell_poweredge_bt_xaction_handler(struct notifier_block
*self
,
3176 unsigned long unused
,
3179 struct smi_info
*smi_info
= in
;
3180 unsigned char *data
= smi_info
->curr_msg
->data
;
3181 unsigned int size
= smi_info
->curr_msg
->data_size
;
3183 (data
[0]>>2) == STORAGE_NETFN
&&
3184 data
[1] == STORAGE_CMD_GET_SDR
&&
3186 return_hosed_msg_badsize(smi_info
);
3192 static struct notifier_block dell_poweredge_bt_xaction_notifier
= {
3193 .notifier_call
= dell_poweredge_bt_xaction_handler
,
3197 * setup_dell_poweredge_bt_xaction_handler
3198 * @info - smi_info.device_id must be filled in already
3200 * Fills in smi_info.device_id.start_transaction_pre_hook
3201 * when we know what function to use there.
3204 setup_dell_poweredge_bt_xaction_handler(struct smi_info
*smi_info
)
3206 struct ipmi_device_id
*id
= &smi_info
->device_id
;
3207 if (id
->manufacturer_id
== DELL_IANA_MFR_ID
&&
3208 smi_info
->si_type
== SI_BT
)
3209 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier
);
3213 * setup_oem_data_handler
3214 * @info - smi_info.device_id must be filled in already
3216 * Fills in smi_info.device_id.oem_data_available_handler
3217 * when we know what function to use there.
3220 static void setup_oem_data_handler(struct smi_info
*smi_info
)
3222 setup_dell_poweredge_oem_data_handler(smi_info
);
3225 static void setup_xaction_handlers(struct smi_info
*smi_info
)
3227 setup_dell_poweredge_bt_xaction_handler(smi_info
);
3230 static inline void wait_for_timer_and_thread(struct smi_info
*smi_info
)
3232 if (smi_info
->thread
!= NULL
)
3233 kthread_stop(smi_info
->thread
);
3234 if (smi_info
->timer_running
)
3235 del_timer_sync(&smi_info
->si_timer
);
3238 static struct ipmi_default_vals
3244 { .type
= SI_KCS
, .port
= 0xca2 },
3245 { .type
= SI_SMIC
, .port
= 0xca9 },
3246 { .type
= SI_BT
, .port
= 0xe4 },
3250 static void default_find_bmc(void)
3252 struct smi_info
*info
;
3255 for (i
= 0; ; i
++) {
3256 if (!ipmi_defaults
[i
].port
)
3259 if (check_legacy_ioport(ipmi_defaults
[i
].port
))
3262 info
= smi_info_alloc();
3266 info
->addr_source
= SI_DEFAULT
;
3268 info
->si_type
= ipmi_defaults
[i
].type
;
3269 info
->io_setup
= port_setup
;
3270 info
->io
.addr_data
= ipmi_defaults
[i
].port
;
3271 info
->io
.addr_type
= IPMI_IO_ADDR_SPACE
;
3273 info
->io
.addr
= NULL
;
3274 info
->io
.regspacing
= DEFAULT_REGSPACING
;
3275 info
->io
.regsize
= DEFAULT_REGSPACING
;
3276 info
->io
.regshift
= 0;
3278 if (add_smi(info
) == 0) {
3279 if ((try_smi_init(info
)) == 0) {
3281 printk(KERN_INFO PFX
"Found default %s"
3282 " state machine at %s address 0x%lx\n",
3283 si_to_str
[info
->si_type
],
3284 addr_space_to_str
[info
->io
.addr_type
],
3285 info
->io
.addr_data
);
3287 cleanup_one_si(info
);
3294 static int is_new_interface(struct smi_info
*info
)
3298 list_for_each_entry(e
, &smi_infos
, link
) {
3299 if (e
->io
.addr_type
!= info
->io
.addr_type
)
3301 if (e
->io
.addr_data
== info
->io
.addr_data
)
3308 static int add_smi(struct smi_info
*new_smi
)
3312 printk(KERN_INFO PFX
"Adding %s-specified %s state machine",
3313 ipmi_addr_src_to_str(new_smi
->addr_source
),
3314 si_to_str
[new_smi
->si_type
]);
3315 mutex_lock(&smi_infos_lock
);
3316 if (!is_new_interface(new_smi
)) {
3317 printk(KERN_CONT
" duplicate interface\n");
3322 printk(KERN_CONT
"\n");
3324 /* So we know not to free it unless we have allocated one. */
3325 new_smi
->intf
= NULL
;
3326 new_smi
->si_sm
= NULL
;
3327 new_smi
->handlers
= NULL
;
3329 list_add_tail(&new_smi
->link
, &smi_infos
);
3332 mutex_unlock(&smi_infos_lock
);
3336 static int try_smi_init(struct smi_info
*new_smi
)
3341 printk(KERN_INFO PFX
"Trying %s-specified %s state"
3342 " machine at %s address 0x%lx, slave address 0x%x,"
3344 ipmi_addr_src_to_str(new_smi
->addr_source
),
3345 si_to_str
[new_smi
->si_type
],
3346 addr_space_to_str
[new_smi
->io
.addr_type
],
3347 new_smi
->io
.addr_data
,
3348 new_smi
->slave_addr
, new_smi
->irq
);
3350 switch (new_smi
->si_type
) {
3352 new_smi
->handlers
= &kcs_smi_handlers
;
3356 new_smi
->handlers
= &smic_smi_handlers
;
3360 new_smi
->handlers
= &bt_smi_handlers
;
3364 /* No support for anything else yet. */
3369 /* Allocate the state machine's data and initialize it. */
3370 new_smi
->si_sm
= kmalloc(new_smi
->handlers
->size(), GFP_KERNEL
);
3371 if (!new_smi
->si_sm
) {
3373 "Could not allocate state machine memory\n");
3377 new_smi
->io_size
= new_smi
->handlers
->init_data(new_smi
->si_sm
,
3380 /* Now that we know the I/O size, we can set up the I/O. */
3381 rv
= new_smi
->io_setup(new_smi
);
3383 printk(KERN_ERR PFX
"Could not set up I/O space\n");
3387 /* Do low-level detection first. */
3388 if (new_smi
->handlers
->detect(new_smi
->si_sm
)) {
3389 if (new_smi
->addr_source
)
3390 printk(KERN_INFO PFX
"Interface detection failed\n");
3396 * Attempt a get device id command. If it fails, we probably
3397 * don't have a BMC here.
3399 rv
= try_get_dev_id(new_smi
);
3401 if (new_smi
->addr_source
)
3402 printk(KERN_INFO PFX
"There appears to be no BMC"
3403 " at this location\n");
3407 setup_oem_data_handler(new_smi
);
3408 setup_xaction_handlers(new_smi
);
3410 new_smi
->waiting_msg
= NULL
;
3411 new_smi
->curr_msg
= NULL
;
3412 atomic_set(&new_smi
->req_events
, 0);
3413 new_smi
->run_to_completion
= false;
3414 for (i
= 0; i
< SI_NUM_STATS
; i
++)
3415 atomic_set(&new_smi
->stats
[i
], 0);
3417 new_smi
->interrupt_disabled
= true;
3418 atomic_set(&new_smi
->need_watch
, 0);
3419 new_smi
->intf_num
= smi_num
;
3422 rv
= try_enable_event_buffer(new_smi
);
3424 new_smi
->has_event_buffer
= true;
3427 * Start clearing the flags before we enable interrupts or the
3428 * timer to avoid racing with the timer.
3430 start_clear_flags(new_smi
);
3433 * IRQ is defined to be set when non-zero. req_events will
3434 * cause a global flags check that will enable interrupts.
3437 new_smi
->interrupt_disabled
= false;
3438 atomic_set(&new_smi
->req_events
, 1);
3441 if (!new_smi
->dev
) {
3443 * If we don't already have a device from something
3444 * else (like PCI), then register a new one.
3446 new_smi
->pdev
= platform_device_alloc("ipmi_si",
3448 if (!new_smi
->pdev
) {
3450 "Unable to allocate platform device\n");
3453 new_smi
->dev
= &new_smi
->pdev
->dev
;
3454 new_smi
->dev
->driver
= &ipmi_driver
.driver
;
3456 rv
= platform_device_add(new_smi
->pdev
);
3459 "Unable to register system interface device:"
3464 new_smi
->dev_registered
= true;
3467 rv
= ipmi_register_smi(&handlers
,
3469 &new_smi
->device_id
,
3471 new_smi
->slave_addr
);
3473 dev_err(new_smi
->dev
, "Unable to register device: error %d\n",
3475 goto out_err_stop_timer
;
3478 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "type",
3482 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3483 goto out_err_stop_timer
;
3486 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "si_stats",
3487 &smi_si_stats_proc_ops
,
3490 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3491 goto out_err_stop_timer
;
3494 rv
= ipmi_smi_add_proc_entry(new_smi
->intf
, "params",
3495 &smi_params_proc_ops
,
3498 dev_err(new_smi
->dev
, "Unable to create proc entry: %d\n", rv
);
3499 goto out_err_stop_timer
;
3502 dev_info(new_smi
->dev
, "IPMI %s interface initialized\n",
3503 si_to_str
[new_smi
->si_type
]);
3508 wait_for_timer_and_thread(new_smi
);
3511 new_smi
->interrupt_disabled
= true;
3513 if (new_smi
->intf
) {
3514 ipmi_smi_t intf
= new_smi
->intf
;
3515 new_smi
->intf
= NULL
;
3516 ipmi_unregister_smi(intf
);
3519 if (new_smi
->irq_cleanup
) {
3520 new_smi
->irq_cleanup(new_smi
);
3521 new_smi
->irq_cleanup
= NULL
;
3525 * Wait until we know that we are out of any interrupt
3526 * handlers might have been running before we freed the
3529 synchronize_sched();
3531 if (new_smi
->si_sm
) {
3532 if (new_smi
->handlers
)
3533 new_smi
->handlers
->cleanup(new_smi
->si_sm
);
3534 kfree(new_smi
->si_sm
);
3535 new_smi
->si_sm
= NULL
;
3537 if (new_smi
->addr_source_cleanup
) {
3538 new_smi
->addr_source_cleanup(new_smi
);
3539 new_smi
->addr_source_cleanup
= NULL
;
3541 if (new_smi
->io_cleanup
) {
3542 new_smi
->io_cleanup(new_smi
);
3543 new_smi
->io_cleanup
= NULL
;
3546 if (new_smi
->dev_registered
) {
3547 platform_device_unregister(new_smi
->pdev
);
3548 new_smi
->dev_registered
= false;
3554 static int init_ipmi_si(void)
3560 enum ipmi_addr_src type
= SI_INVALID
;
3566 if (si_tryplatform
) {
3567 rv
= platform_driver_register(&ipmi_driver
);
3569 printk(KERN_ERR PFX
"Unable to register "
3570 "driver: %d\n", rv
);
3575 /* Parse out the si_type string into its components. */
3578 for (i
= 0; (i
< SI_MAX_PARMS
) && (*str
!= '\0'); i
++) {
3580 str
= strchr(str
, ',');
3590 printk(KERN_INFO
"IPMI System Interface driver.\n");
3592 /* If the user gave us a device, they presumably want us to use it */
3593 if (!hardcode_find_bmc())
3598 rv
= pci_register_driver(&ipmi_pci_driver
);
3600 printk(KERN_ERR PFX
"Unable to register "
3601 "PCI driver: %d\n", rv
);
3603 pci_registered
= true;
3609 pnp_register_driver(&ipmi_pnp_driver
);
3610 pnp_registered
= true;
3624 #ifdef CONFIG_PARISC
3625 register_parisc_driver(&ipmi_parisc_driver
);
3626 parisc_registered
= true;
3627 /* poking PC IO addresses will crash machine, don't do it */
3631 /* We prefer devices with interrupts, but in the case of a machine
3632 with multiple BMCs we assume that there will be several instances
3633 of a given type so if we succeed in registering a type then also
3634 try to register everything else of the same type */
3636 mutex_lock(&smi_infos_lock
);
3637 list_for_each_entry(e
, &smi_infos
, link
) {
3638 /* Try to register a device if it has an IRQ and we either
3639 haven't successfully registered a device yet or this
3640 device has the same type as one we successfully registered */
3641 if (e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3642 if (!try_smi_init(e
)) {
3643 type
= e
->addr_source
;
3648 /* type will only have been set if we successfully registered an si */
3650 mutex_unlock(&smi_infos_lock
);
3654 /* Fall back to the preferred device */
3656 list_for_each_entry(e
, &smi_infos
, link
) {
3657 if (!e
->irq
&& (!type
|| e
->addr_source
== type
)) {
3658 if (!try_smi_init(e
)) {
3659 type
= e
->addr_source
;
3663 mutex_unlock(&smi_infos_lock
);
3668 if (si_trydefaults
) {
3669 mutex_lock(&smi_infos_lock
);
3670 if (list_empty(&smi_infos
)) {
3671 /* No BMC was found, try defaults. */
3672 mutex_unlock(&smi_infos_lock
);
3675 mutex_unlock(&smi_infos_lock
);
3678 mutex_lock(&smi_infos_lock
);
3679 if (unload_when_empty
&& list_empty(&smi_infos
)) {
3680 mutex_unlock(&smi_infos_lock
);
3682 printk(KERN_WARNING PFX
3683 "Unable to find any System Interface(s)\n");
3686 mutex_unlock(&smi_infos_lock
);
3690 module_init(init_ipmi_si
);
3692 static void cleanup_one_si(struct smi_info
*to_clean
)
3699 if (to_clean
->intf
) {
3700 ipmi_smi_t intf
= to_clean
->intf
;
3702 to_clean
->intf
= NULL
;
3703 rv
= ipmi_unregister_smi(intf
);
3705 pr_err(PFX
"Unable to unregister device: errno=%d\n",
3711 dev_set_drvdata(to_clean
->dev
, NULL
);
3713 list_del(&to_clean
->link
);
3716 * Make sure that interrupts, the timer and the thread are
3717 * stopped and will not run again.
3719 if (to_clean
->irq_cleanup
)
3720 to_clean
->irq_cleanup(to_clean
);
3721 wait_for_timer_and_thread(to_clean
);
3724 * Timeouts are stopped, now make sure the interrupts are off
3725 * in the BMC. Note that timers and CPU interrupts are off,
3726 * so no need for locks.
3728 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3730 schedule_timeout_uninterruptible(1);
3732 disable_si_irq(to_clean
);
3733 while (to_clean
->curr_msg
|| (to_clean
->si_state
!= SI_NORMAL
)) {
3735 schedule_timeout_uninterruptible(1);
3738 if (to_clean
->handlers
)
3739 to_clean
->handlers
->cleanup(to_clean
->si_sm
);
3741 kfree(to_clean
->si_sm
);
3743 if (to_clean
->addr_source_cleanup
)
3744 to_clean
->addr_source_cleanup(to_clean
);
3745 if (to_clean
->io_cleanup
)
3746 to_clean
->io_cleanup(to_clean
);
3748 if (to_clean
->dev_registered
)
3749 platform_device_unregister(to_clean
->pdev
);
3754 static void cleanup_ipmi_si(void)
3756 struct smi_info
*e
, *tmp_e
;
3763 pci_unregister_driver(&ipmi_pci_driver
);
3767 pnp_unregister_driver(&ipmi_pnp_driver
);
3769 #ifdef CONFIG_PARISC
3770 if (parisc_registered
)
3771 unregister_parisc_driver(&ipmi_parisc_driver
);
3774 platform_driver_unregister(&ipmi_driver
);
3776 mutex_lock(&smi_infos_lock
);
3777 list_for_each_entry_safe(e
, tmp_e
, &smi_infos
, link
)
3779 mutex_unlock(&smi_infos_lock
);
3781 module_exit(cleanup_ipmi_si
);
3783 MODULE_LICENSE("GPL");
3784 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
3785 MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3786 " system interfaces.");