4 * Incoming and outgoing message routing for an IPMI interface.
6 * Author: MontaVista Software, Inc.
7 * Corey Minyard <minyard@mvista.com>
10 * Copyright 2002 MontaVista Software Inc.
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
27 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * You should have received a copy of the GNU General Public License along
30 * with this program; if not, write to the Free Software Foundation, Inc.,
31 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include <linux/module.h>
35 #include <linux/errno.h>
36 #include <asm/system.h>
37 #include <linux/poll.h>
38 #include <linux/spinlock.h>
39 #include <linux/mutex.h>
40 #include <linux/slab.h>
41 #include <linux/ipmi.h>
42 #include <linux/ipmi_smi.h>
43 #include <linux/notifier.h>
44 #include <linux/init.h>
45 #include <linux/proc_fs.h>
46 #include <linux/rcupdate.h>
48 #define PFX "IPMI message handler: "
50 #define IPMI_DRIVER_VERSION "39.1"
52 static struct ipmi_recv_msg
*ipmi_alloc_recv_msg(void);
53 static int ipmi_init_msghandler(void);
55 static int initialized
;
58 static struct proc_dir_entry
*proc_ipmi_root
;
59 #endif /* CONFIG_PROC_FS */
61 /* Remain in auto-maintenance mode for this amount of time (in ms). */
62 #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
64 #define MAX_EVENTS_IN_QUEUE 25
66 /* Don't let a message sit in a queue forever, always time it with at lest
67 the max message timer. This is in milliseconds. */
68 #define MAX_MSG_TIMEOUT 60000
72 * The main "user" data structure.
76 struct list_head link
;
78 /* Set to "0" when the user is destroyed. */
83 /* The upper layer that handles receive messages. */
84 struct ipmi_user_hndl
*handler
;
87 /* The interface this user is bound to. */
90 /* Does this interface receive IPMI events? */
96 struct list_head link
;
104 * This is used to form a linked lised during mass deletion.
105 * Since this is in an RCU list, we cannot use the link above
106 * or change any data until the RCU period completes. So we
107 * use this next variable during mass deletion so we can have
108 * a list and don't have to wait and restart the search on
109 * every individual deletion of a command. */
110 struct cmd_rcvr
*next
;
115 unsigned int inuse
: 1;
116 unsigned int broadcast
: 1;
118 unsigned long timeout
;
119 unsigned long orig_timeout
;
120 unsigned int retries_left
;
122 /* To verify on an incoming send message response that this is
123 the message that the response is for, we keep a sequence id
124 and increment it every time we send a message. */
127 /* This is held so we can properly respond to the message on a
128 timeout, and it is used to hold the temporary data for
129 retransmission, too. */
130 struct ipmi_recv_msg
*recv_msg
;
133 /* Store the information in a msgid (long) to allow us to find a
134 sequence table entry from the msgid. */
135 #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
137 #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
139 seq = ((msgid >> 26) & 0x3f); \
140 seqid = (msgid & 0x3fffff); \
143 #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
147 unsigned char medium
;
148 unsigned char protocol
;
150 /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
151 but may be changed by the user. */
152 unsigned char address
;
154 /* My LUN. This should generally stay the SMS LUN, but just in
159 #ifdef CONFIG_PROC_FS
160 struct ipmi_proc_entry
163 struct ipmi_proc_entry
*next
;
169 struct platform_device
*dev
;
170 struct ipmi_device_id id
;
171 unsigned char guid
[16];
174 struct kref refcount
;
176 /* bmc device attributes */
177 struct device_attribute device_id_attr
;
178 struct device_attribute provides_dev_sdrs_attr
;
179 struct device_attribute revision_attr
;
180 struct device_attribute firmware_rev_attr
;
181 struct device_attribute version_attr
;
182 struct device_attribute add_dev_support_attr
;
183 struct device_attribute manufacturer_id_attr
;
184 struct device_attribute product_id_attr
;
185 struct device_attribute guid_attr
;
186 struct device_attribute aux_firmware_rev_attr
;
189 #define IPMI_IPMB_NUM_SEQ 64
190 #define IPMI_MAX_CHANNELS 16
193 /* What interface number are we? */
196 struct kref refcount
;
198 /* Used for a list of interfaces. */
199 struct list_head link
;
201 /* The list of upper layers that are using me. seq_lock
203 struct list_head users
;
205 /* Information to supply to users. */
206 unsigned char ipmi_version_major
;
207 unsigned char ipmi_version_minor
;
209 /* Used for wake ups at startup. */
210 wait_queue_head_t waitq
;
212 struct bmc_device
*bmc
;
216 /* This is the lower-layer's sender routine. Note that you
217 * must either be holding the ipmi_interfaces_mutex or be in
218 * an umpreemptible region to use this. You must fetch the
219 * value into a local variable and make sure it is not NULL. */
220 struct ipmi_smi_handlers
*handlers
;
223 #ifdef CONFIG_PROC_FS
224 /* A list of proc entries for this interface. This does not
225 need a lock, only one thread creates it and only one thread
227 spinlock_t proc_entry_lock
;
228 struct ipmi_proc_entry
*proc_entries
;
231 /* Driver-model device for the system interface. */
232 struct device
*si_dev
;
234 /* A table of sequence numbers for this interface. We use the
235 sequence numbers for IPMB messages that go out of the
236 interface to match them up with their responses. A routine
237 is called periodically to time the items in this list. */
239 struct seq_table seq_table
[IPMI_IPMB_NUM_SEQ
];
242 /* Messages that were delayed for some reason (out of memory,
243 for instance), will go in here to be processed later in a
244 periodic timer interrupt. */
245 spinlock_t waiting_msgs_lock
;
246 struct list_head waiting_msgs
;
248 /* The list of command receivers that are registered for commands
249 on this interface. */
250 struct mutex cmd_rcvrs_mutex
;
251 struct list_head cmd_rcvrs
;
253 /* Events that were queues because no one was there to receive
255 spinlock_t events_lock
; /* For dealing with event stuff. */
256 struct list_head waiting_events
;
257 unsigned int waiting_events_count
; /* How many events in queue? */
258 int delivering_events
;
260 /* The event receiver for my BMC, only really used at panic
261 shutdown as a place to store this. */
262 unsigned char event_receiver
;
263 unsigned char event_receiver_lun
;
264 unsigned char local_sel_device
;
265 unsigned char local_event_generator
;
267 /* For handling of maintenance mode. */
268 int maintenance_mode
;
269 int maintenance_mode_enable
;
270 int auto_maintenance_timeout
;
271 spinlock_t maintenance_mode_lock
; /* Used in a timer... */
273 /* A cheap hack, if this is non-null and a message to an
274 interface comes in with a NULL user, call this routine with
275 it. Note that the message will still be freed by the
276 caller. This only works on the system interface. */
277 void (*null_user_handler
)(ipmi_smi_t intf
, struct ipmi_recv_msg
*msg
);
279 /* When we are scanning the channels for an SMI, this will
280 tell which channel we are scanning. */
283 /* Channel information */
284 struct ipmi_channel channels
[IPMI_MAX_CHANNELS
];
287 struct proc_dir_entry
*proc_dir
;
288 char proc_dir_name
[10];
290 spinlock_t counter_lock
; /* For making counters atomic. */
292 /* Commands we got that were invalid. */
293 unsigned int sent_invalid_commands
;
295 /* Commands we sent to the MC. */
296 unsigned int sent_local_commands
;
297 /* Responses from the MC that were delivered to a user. */
298 unsigned int handled_local_responses
;
299 /* Responses from the MC that were not delivered to a user. */
300 unsigned int unhandled_local_responses
;
302 /* Commands we sent out to the IPMB bus. */
303 unsigned int sent_ipmb_commands
;
304 /* Commands sent on the IPMB that had errors on the SEND CMD */
305 unsigned int sent_ipmb_command_errs
;
306 /* Each retransmit increments this count. */
307 unsigned int retransmitted_ipmb_commands
;
308 /* When a message times out (runs out of retransmits) this is
310 unsigned int timed_out_ipmb_commands
;
312 /* This is like above, but for broadcasts. Broadcasts are
313 *not* included in the above count (they are expected to
315 unsigned int timed_out_ipmb_broadcasts
;
317 /* Responses I have sent to the IPMB bus. */
318 unsigned int sent_ipmb_responses
;
320 /* The response was delivered to the user. */
321 unsigned int handled_ipmb_responses
;
322 /* The response had invalid data in it. */
323 unsigned int invalid_ipmb_responses
;
324 /* The response didn't have anyone waiting for it. */
325 unsigned int unhandled_ipmb_responses
;
327 /* Commands we sent out to the IPMB bus. */
328 unsigned int sent_lan_commands
;
329 /* Commands sent on the IPMB that had errors on the SEND CMD */
330 unsigned int sent_lan_command_errs
;
331 /* Each retransmit increments this count. */
332 unsigned int retransmitted_lan_commands
;
333 /* When a message times out (runs out of retransmits) this is
335 unsigned int timed_out_lan_commands
;
337 /* Responses I have sent to the IPMB bus. */
338 unsigned int sent_lan_responses
;
340 /* The response was delivered to the user. */
341 unsigned int handled_lan_responses
;
342 /* The response had invalid data in it. */
343 unsigned int invalid_lan_responses
;
344 /* The response didn't have anyone waiting for it. */
345 unsigned int unhandled_lan_responses
;
347 /* The command was delivered to the user. */
348 unsigned int handled_commands
;
349 /* The command had invalid data in it. */
350 unsigned int invalid_commands
;
351 /* The command didn't have anyone waiting for it. */
352 unsigned int unhandled_commands
;
354 /* Invalid data in an event. */
355 unsigned int invalid_events
;
356 /* Events that were received with the proper format. */
359 #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
362 * The driver model view of the IPMI messaging driver.
364 static struct device_driver ipmidriver
= {
366 .bus
= &platform_bus_type
368 static DEFINE_MUTEX(ipmidriver_mutex
);
370 static struct list_head ipmi_interfaces
= LIST_HEAD_INIT(ipmi_interfaces
);
371 static DEFINE_MUTEX(ipmi_interfaces_mutex
);
373 /* List of watchers that want to know when smi's are added and
375 static struct list_head smi_watchers
= LIST_HEAD_INIT(smi_watchers
);
376 static DEFINE_MUTEX(smi_watchers_mutex
);
379 static void free_recv_msg_list(struct list_head
*q
)
381 struct ipmi_recv_msg
*msg
, *msg2
;
383 list_for_each_entry_safe(msg
, msg2
, q
, link
) {
384 list_del(&msg
->link
);
385 ipmi_free_recv_msg(msg
);
389 static void free_smi_msg_list(struct list_head
*q
)
391 struct ipmi_smi_msg
*msg
, *msg2
;
393 list_for_each_entry_safe(msg
, msg2
, q
, link
) {
394 list_del(&msg
->link
);
395 ipmi_free_smi_msg(msg
);
399 static void clean_up_interface_data(ipmi_smi_t intf
)
402 struct cmd_rcvr
*rcvr
, *rcvr2
;
403 struct list_head list
;
405 free_smi_msg_list(&intf
->waiting_msgs
);
406 free_recv_msg_list(&intf
->waiting_events
);
409 * Wholesale remove all the entries from the list in the
410 * interface and wait for RCU to know that none are in use.
412 mutex_lock(&intf
->cmd_rcvrs_mutex
);
413 INIT_LIST_HEAD(&list
);
414 list_splice_init_rcu(&intf
->cmd_rcvrs
, &list
, synchronize_rcu
);
415 mutex_unlock(&intf
->cmd_rcvrs_mutex
);
417 list_for_each_entry_safe(rcvr
, rcvr2
, &list
, link
)
420 for (i
= 0; i
< IPMI_IPMB_NUM_SEQ
; i
++) {
421 if ((intf
->seq_table
[i
].inuse
)
422 && (intf
->seq_table
[i
].recv_msg
))
424 ipmi_free_recv_msg(intf
->seq_table
[i
].recv_msg
);
429 static void intf_free(struct kref
*ref
)
431 ipmi_smi_t intf
= container_of(ref
, struct ipmi_smi
, refcount
);
433 clean_up_interface_data(intf
);
437 struct watcher_entry
{
440 struct list_head link
;
443 int ipmi_smi_watcher_register(struct ipmi_smi_watcher
*watcher
)
446 struct list_head to_deliver
= LIST_HEAD_INIT(to_deliver
);
447 struct watcher_entry
*e
, *e2
;
449 mutex_lock(&smi_watchers_mutex
);
451 mutex_lock(&ipmi_interfaces_mutex
);
453 /* Build a list of things to deliver. */
454 list_for_each_entry(intf
, &ipmi_interfaces
, link
) {
455 if (intf
->intf_num
== -1)
457 e
= kmalloc(sizeof(*e
), GFP_KERNEL
);
460 kref_get(&intf
->refcount
);
462 e
->intf_num
= intf
->intf_num
;
463 list_add_tail(&e
->link
, &to_deliver
);
466 /* We will succeed, so add it to the list. */
467 list_add(&watcher
->link
, &smi_watchers
);
469 mutex_unlock(&ipmi_interfaces_mutex
);
471 list_for_each_entry_safe(e
, e2
, &to_deliver
, link
) {
473 watcher
->new_smi(e
->intf_num
, e
->intf
->si_dev
);
474 kref_put(&e
->intf
->refcount
, intf_free
);
478 mutex_unlock(&smi_watchers_mutex
);
483 mutex_unlock(&ipmi_interfaces_mutex
);
484 mutex_unlock(&smi_watchers_mutex
);
485 list_for_each_entry_safe(e
, e2
, &to_deliver
, link
) {
487 kref_put(&e
->intf
->refcount
, intf_free
);
493 int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher
*watcher
)
495 mutex_lock(&smi_watchers_mutex
);
496 list_del(&(watcher
->link
));
497 mutex_unlock(&smi_watchers_mutex
);
502 * Must be called with smi_watchers_mutex held.
505 call_smi_watchers(int i
, struct device
*dev
)
507 struct ipmi_smi_watcher
*w
;
509 list_for_each_entry(w
, &smi_watchers
, link
) {
510 if (try_module_get(w
->owner
)) {
512 module_put(w
->owner
);
518 ipmi_addr_equal(struct ipmi_addr
*addr1
, struct ipmi_addr
*addr2
)
520 if (addr1
->addr_type
!= addr2
->addr_type
)
523 if (addr1
->channel
!= addr2
->channel
)
526 if (addr1
->addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
) {
527 struct ipmi_system_interface_addr
*smi_addr1
528 = (struct ipmi_system_interface_addr
*) addr1
;
529 struct ipmi_system_interface_addr
*smi_addr2
530 = (struct ipmi_system_interface_addr
*) addr2
;
531 return (smi_addr1
->lun
== smi_addr2
->lun
);
534 if ((addr1
->addr_type
== IPMI_IPMB_ADDR_TYPE
)
535 || (addr1
->addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
))
537 struct ipmi_ipmb_addr
*ipmb_addr1
538 = (struct ipmi_ipmb_addr
*) addr1
;
539 struct ipmi_ipmb_addr
*ipmb_addr2
540 = (struct ipmi_ipmb_addr
*) addr2
;
542 return ((ipmb_addr1
->slave_addr
== ipmb_addr2
->slave_addr
)
543 && (ipmb_addr1
->lun
== ipmb_addr2
->lun
));
546 if (addr1
->addr_type
== IPMI_LAN_ADDR_TYPE
) {
547 struct ipmi_lan_addr
*lan_addr1
548 = (struct ipmi_lan_addr
*) addr1
;
549 struct ipmi_lan_addr
*lan_addr2
550 = (struct ipmi_lan_addr
*) addr2
;
552 return ((lan_addr1
->remote_SWID
== lan_addr2
->remote_SWID
)
553 && (lan_addr1
->local_SWID
== lan_addr2
->local_SWID
)
554 && (lan_addr1
->session_handle
555 == lan_addr2
->session_handle
)
556 && (lan_addr1
->lun
== lan_addr2
->lun
));
562 int ipmi_validate_addr(struct ipmi_addr
*addr
, int len
)
564 if (len
< sizeof(struct ipmi_system_interface_addr
)) {
568 if (addr
->addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
) {
569 if (addr
->channel
!= IPMI_BMC_CHANNEL
)
574 if ((addr
->channel
== IPMI_BMC_CHANNEL
)
575 || (addr
->channel
>= IPMI_MAX_CHANNELS
)
576 || (addr
->channel
< 0))
579 if ((addr
->addr_type
== IPMI_IPMB_ADDR_TYPE
)
580 || (addr
->addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
))
582 if (len
< sizeof(struct ipmi_ipmb_addr
)) {
588 if (addr
->addr_type
== IPMI_LAN_ADDR_TYPE
) {
589 if (len
< sizeof(struct ipmi_lan_addr
)) {
598 unsigned int ipmi_addr_length(int addr_type
)
600 if (addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
)
601 return sizeof(struct ipmi_system_interface_addr
);
603 if ((addr_type
== IPMI_IPMB_ADDR_TYPE
)
604 || (addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
))
606 return sizeof(struct ipmi_ipmb_addr
);
609 if (addr_type
== IPMI_LAN_ADDR_TYPE
)
610 return sizeof(struct ipmi_lan_addr
);
615 static void deliver_response(struct ipmi_recv_msg
*msg
)
618 ipmi_smi_t intf
= msg
->user_msg_data
;
621 /* Special handling for NULL users. */
622 if (intf
->null_user_handler
) {
623 intf
->null_user_handler(intf
, msg
);
624 spin_lock_irqsave(&intf
->counter_lock
, flags
);
625 intf
->handled_local_responses
++;
626 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
628 /* No handler, so give up. */
629 spin_lock_irqsave(&intf
->counter_lock
, flags
);
630 intf
->unhandled_local_responses
++;
631 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
633 ipmi_free_recv_msg(msg
);
635 ipmi_user_t user
= msg
->user
;
636 user
->handler
->ipmi_recv_hndl(msg
, user
->handler_data
);
641 deliver_err_response(struct ipmi_recv_msg
*msg
, int err
)
643 msg
->recv_type
= IPMI_RESPONSE_RECV_TYPE
;
644 msg
->msg_data
[0] = err
;
645 msg
->msg
.netfn
|= 1; /* Convert to a response. */
646 msg
->msg
.data_len
= 1;
647 msg
->msg
.data
= msg
->msg_data
;
648 deliver_response(msg
);
651 /* Find the next sequence number not being used and add the given
652 message with the given timeout to the sequence table. This must be
653 called with the interface's seq_lock held. */
654 static int intf_next_seq(ipmi_smi_t intf
,
655 struct ipmi_recv_msg
*recv_msg
,
656 unsigned long timeout
,
665 for (i
= intf
->curr_seq
;
666 (i
+1)%IPMI_IPMB_NUM_SEQ
!= intf
->curr_seq
;
667 i
= (i
+1)%IPMI_IPMB_NUM_SEQ
)
669 if (!intf
->seq_table
[i
].inuse
)
673 if (!intf
->seq_table
[i
].inuse
) {
674 intf
->seq_table
[i
].recv_msg
= recv_msg
;
676 /* Start with the maximum timeout, when the send response
677 comes in we will start the real timer. */
678 intf
->seq_table
[i
].timeout
= MAX_MSG_TIMEOUT
;
679 intf
->seq_table
[i
].orig_timeout
= timeout
;
680 intf
->seq_table
[i
].retries_left
= retries
;
681 intf
->seq_table
[i
].broadcast
= broadcast
;
682 intf
->seq_table
[i
].inuse
= 1;
683 intf
->seq_table
[i
].seqid
= NEXT_SEQID(intf
->seq_table
[i
].seqid
);
685 *seqid
= intf
->seq_table
[i
].seqid
;
686 intf
->curr_seq
= (i
+1)%IPMI_IPMB_NUM_SEQ
;
694 /* Return the receive message for the given sequence number and
695 release the sequence number so it can be reused. Some other data
696 is passed in to be sure the message matches up correctly (to help
697 guard against message coming in after their timeout and the
698 sequence number being reused). */
699 static int intf_find_seq(ipmi_smi_t intf
,
704 struct ipmi_addr
*addr
,
705 struct ipmi_recv_msg
**recv_msg
)
710 if (seq
>= IPMI_IPMB_NUM_SEQ
)
713 spin_lock_irqsave(&(intf
->seq_lock
), flags
);
714 if (intf
->seq_table
[seq
].inuse
) {
715 struct ipmi_recv_msg
*msg
= intf
->seq_table
[seq
].recv_msg
;
717 if ((msg
->addr
.channel
== channel
)
718 && (msg
->msg
.cmd
== cmd
)
719 && (msg
->msg
.netfn
== netfn
)
720 && (ipmi_addr_equal(addr
, &(msg
->addr
))))
723 intf
->seq_table
[seq
].inuse
= 0;
727 spin_unlock_irqrestore(&(intf
->seq_lock
), flags
);
733 /* Start the timer for a specific sequence table entry. */
734 static int intf_start_seq_timer(ipmi_smi_t intf
,
743 GET_SEQ_FROM_MSGID(msgid
, seq
, seqid
);
745 spin_lock_irqsave(&(intf
->seq_lock
), flags
);
746 /* We do this verification because the user can be deleted
747 while a message is outstanding. */
748 if ((intf
->seq_table
[seq
].inuse
)
749 && (intf
->seq_table
[seq
].seqid
== seqid
))
751 struct seq_table
*ent
= &(intf
->seq_table
[seq
]);
752 ent
->timeout
= ent
->orig_timeout
;
755 spin_unlock_irqrestore(&(intf
->seq_lock
), flags
);
760 /* Got an error for the send message for a specific sequence number. */
761 static int intf_err_seq(ipmi_smi_t intf
,
769 struct ipmi_recv_msg
*msg
= NULL
;
772 GET_SEQ_FROM_MSGID(msgid
, seq
, seqid
);
774 spin_lock_irqsave(&(intf
->seq_lock
), flags
);
775 /* We do this verification because the user can be deleted
776 while a message is outstanding. */
777 if ((intf
->seq_table
[seq
].inuse
)
778 && (intf
->seq_table
[seq
].seqid
== seqid
))
780 struct seq_table
*ent
= &(intf
->seq_table
[seq
]);
786 spin_unlock_irqrestore(&(intf
->seq_lock
), flags
);
789 deliver_err_response(msg
, err
);
795 int ipmi_create_user(unsigned int if_num
,
796 struct ipmi_user_hndl
*handler
,
801 ipmi_user_t new_user
;
805 /* There is no module usecount here, because it's not
806 required. Since this can only be used by and called from
807 other modules, they will implicitly use this module, and
808 thus this can't be removed unless the other modules are
814 /* Make sure the driver is actually initialized, this handles
815 problems with initialization order. */
817 rv
= ipmi_init_msghandler();
821 /* The init code doesn't return an error if it was turned
822 off, but it won't initialize. Check that. */
827 new_user
= kmalloc(sizeof(*new_user
), GFP_KERNEL
);
831 mutex_lock(&ipmi_interfaces_mutex
);
832 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
833 if (intf
->intf_num
== if_num
)
836 /* Not found, return an error */
841 /* Note that each existing user holds a refcount to the interface. */
842 kref_get(&intf
->refcount
);
844 kref_init(&new_user
->refcount
);
845 new_user
->handler
= handler
;
846 new_user
->handler_data
= handler_data
;
847 new_user
->intf
= intf
;
848 new_user
->gets_events
= 0;
850 if (!try_module_get(intf
->handlers
->owner
)) {
855 if (intf
->handlers
->inc_usecount
) {
856 rv
= intf
->handlers
->inc_usecount(intf
->send_info
);
858 module_put(intf
->handlers
->owner
);
863 /* Hold the lock so intf->handlers is guaranteed to be good
865 mutex_unlock(&ipmi_interfaces_mutex
);
868 spin_lock_irqsave(&intf
->seq_lock
, flags
);
869 list_add_rcu(&new_user
->link
, &intf
->users
);
870 spin_unlock_irqrestore(&intf
->seq_lock
, flags
);
875 kref_put(&intf
->refcount
, intf_free
);
877 mutex_unlock(&ipmi_interfaces_mutex
);
882 static void free_user(struct kref
*ref
)
884 ipmi_user_t user
= container_of(ref
, struct ipmi_user
, refcount
);
888 int ipmi_destroy_user(ipmi_user_t user
)
890 ipmi_smi_t intf
= user
->intf
;
893 struct cmd_rcvr
*rcvr
;
894 struct cmd_rcvr
*rcvrs
= NULL
;
898 /* Remove the user from the interface's sequence table. */
899 spin_lock_irqsave(&intf
->seq_lock
, flags
);
900 list_del_rcu(&user
->link
);
902 for (i
= 0; i
< IPMI_IPMB_NUM_SEQ
; i
++) {
903 if (intf
->seq_table
[i
].inuse
904 && (intf
->seq_table
[i
].recv_msg
->user
== user
))
906 intf
->seq_table
[i
].inuse
= 0;
907 ipmi_free_recv_msg(intf
->seq_table
[i
].recv_msg
);
910 spin_unlock_irqrestore(&intf
->seq_lock
, flags
);
913 * Remove the user from the command receiver's table. First
914 * we build a list of everything (not using the standard link,
915 * since other things may be using it till we do
916 * synchronize_rcu()) then free everything in that list.
918 mutex_lock(&intf
->cmd_rcvrs_mutex
);
919 list_for_each_entry_rcu(rcvr
, &intf
->cmd_rcvrs
, link
) {
920 if (rcvr
->user
== user
) {
921 list_del_rcu(&rcvr
->link
);
926 mutex_unlock(&intf
->cmd_rcvrs_mutex
);
934 mutex_lock(&ipmi_interfaces_mutex
);
935 if (intf
->handlers
) {
936 module_put(intf
->handlers
->owner
);
937 if (intf
->handlers
->dec_usecount
)
938 intf
->handlers
->dec_usecount(intf
->send_info
);
940 mutex_unlock(&ipmi_interfaces_mutex
);
942 kref_put(&intf
->refcount
, intf_free
);
944 kref_put(&user
->refcount
, free_user
);
949 void ipmi_get_version(ipmi_user_t user
,
950 unsigned char *major
,
951 unsigned char *minor
)
953 *major
= user
->intf
->ipmi_version_major
;
954 *minor
= user
->intf
->ipmi_version_minor
;
957 int ipmi_set_my_address(ipmi_user_t user
,
958 unsigned int channel
,
959 unsigned char address
)
961 if (channel
>= IPMI_MAX_CHANNELS
)
963 user
->intf
->channels
[channel
].address
= address
;
967 int ipmi_get_my_address(ipmi_user_t user
,
968 unsigned int channel
,
969 unsigned char *address
)
971 if (channel
>= IPMI_MAX_CHANNELS
)
973 *address
= user
->intf
->channels
[channel
].address
;
977 int ipmi_set_my_LUN(ipmi_user_t user
,
978 unsigned int channel
,
981 if (channel
>= IPMI_MAX_CHANNELS
)
983 user
->intf
->channels
[channel
].lun
= LUN
& 0x3;
987 int ipmi_get_my_LUN(ipmi_user_t user
,
988 unsigned int channel
,
989 unsigned char *address
)
991 if (channel
>= IPMI_MAX_CHANNELS
)
993 *address
= user
->intf
->channels
[channel
].lun
;
997 int ipmi_get_maintenance_mode(ipmi_user_t user
)
1000 unsigned long flags
;
1002 spin_lock_irqsave(&user
->intf
->maintenance_mode_lock
, flags
);
1003 mode
= user
->intf
->maintenance_mode
;
1004 spin_unlock_irqrestore(&user
->intf
->maintenance_mode_lock
, flags
);
1008 EXPORT_SYMBOL(ipmi_get_maintenance_mode
);
1010 static void maintenance_mode_update(ipmi_smi_t intf
)
1012 if (intf
->handlers
->set_maintenance_mode
)
1013 intf
->handlers
->set_maintenance_mode(
1014 intf
->send_info
, intf
->maintenance_mode_enable
);
1017 int ipmi_set_maintenance_mode(ipmi_user_t user
, int mode
)
1020 unsigned long flags
;
1021 ipmi_smi_t intf
= user
->intf
;
1023 spin_lock_irqsave(&intf
->maintenance_mode_lock
, flags
);
1024 if (intf
->maintenance_mode
!= mode
) {
1026 case IPMI_MAINTENANCE_MODE_AUTO
:
1027 intf
->maintenance_mode
= mode
;
1028 intf
->maintenance_mode_enable
1029 = (intf
->auto_maintenance_timeout
> 0);
1032 case IPMI_MAINTENANCE_MODE_OFF
:
1033 intf
->maintenance_mode
= mode
;
1034 intf
->maintenance_mode_enable
= 0;
1037 case IPMI_MAINTENANCE_MODE_ON
:
1038 intf
->maintenance_mode
= mode
;
1039 intf
->maintenance_mode_enable
= 1;
1047 maintenance_mode_update(intf
);
1050 spin_unlock_irqrestore(&intf
->maintenance_mode_lock
, flags
);
1054 EXPORT_SYMBOL(ipmi_set_maintenance_mode
);
1056 int ipmi_set_gets_events(ipmi_user_t user
, int val
)
1058 unsigned long flags
;
1059 ipmi_smi_t intf
= user
->intf
;
1060 struct ipmi_recv_msg
*msg
, *msg2
;
1061 struct list_head msgs
;
1063 INIT_LIST_HEAD(&msgs
);
1065 spin_lock_irqsave(&intf
->events_lock
, flags
);
1066 user
->gets_events
= val
;
1068 if (intf
->delivering_events
)
1070 * Another thread is delivering events for this, so
1071 * let it handle any new events.
1075 /* Deliver any queued events. */
1076 while (user
->gets_events
&& !list_empty(&intf
->waiting_events
)) {
1077 list_for_each_entry_safe(msg
, msg2
, &intf
->waiting_events
, link
)
1078 list_move_tail(&msg
->link
, &msgs
);
1079 intf
->waiting_events_count
= 0;
1081 intf
->delivering_events
= 1;
1082 spin_unlock_irqrestore(&intf
->events_lock
, flags
);
1084 list_for_each_entry_safe(msg
, msg2
, &msgs
, link
) {
1086 kref_get(&user
->refcount
);
1087 deliver_response(msg
);
1090 spin_lock_irqsave(&intf
->events_lock
, flags
);
1091 intf
->delivering_events
= 0;
1095 spin_unlock_irqrestore(&intf
->events_lock
, flags
);
1100 static struct cmd_rcvr
*find_cmd_rcvr(ipmi_smi_t intf
,
1101 unsigned char netfn
,
1105 struct cmd_rcvr
*rcvr
;
1107 list_for_each_entry_rcu(rcvr
, &intf
->cmd_rcvrs
, link
) {
1108 if ((rcvr
->netfn
== netfn
) && (rcvr
->cmd
== cmd
)
1109 && (rcvr
->chans
& (1 << chan
)))
1115 static int is_cmd_rcvr_exclusive(ipmi_smi_t intf
,
1116 unsigned char netfn
,
1120 struct cmd_rcvr
*rcvr
;
1122 list_for_each_entry_rcu(rcvr
, &intf
->cmd_rcvrs
, link
) {
1123 if ((rcvr
->netfn
== netfn
) && (rcvr
->cmd
== cmd
)
1124 && (rcvr
->chans
& chans
))
1130 int ipmi_register_for_cmd(ipmi_user_t user
,
1131 unsigned char netfn
,
1135 ipmi_smi_t intf
= user
->intf
;
1136 struct cmd_rcvr
*rcvr
;
1140 rcvr
= kmalloc(sizeof(*rcvr
), GFP_KERNEL
);
1144 rcvr
->netfn
= netfn
;
1145 rcvr
->chans
= chans
;
1148 mutex_lock(&intf
->cmd_rcvrs_mutex
);
1149 /* Make sure the command/netfn is not already registered. */
1150 if (!is_cmd_rcvr_exclusive(intf
, netfn
, cmd
, chans
)) {
1155 list_add_rcu(&rcvr
->link
, &intf
->cmd_rcvrs
);
1158 mutex_unlock(&intf
->cmd_rcvrs_mutex
);
1165 int ipmi_unregister_for_cmd(ipmi_user_t user
,
1166 unsigned char netfn
,
1170 ipmi_smi_t intf
= user
->intf
;
1171 struct cmd_rcvr
*rcvr
;
1172 struct cmd_rcvr
*rcvrs
= NULL
;
1173 int i
, rv
= -ENOENT
;
1175 mutex_lock(&intf
->cmd_rcvrs_mutex
);
1176 for (i
= 0; i
< IPMI_NUM_CHANNELS
; i
++) {
1177 if (((1 << i
) & chans
) == 0)
1179 rcvr
= find_cmd_rcvr(intf
, netfn
, cmd
, i
);
1182 if (rcvr
->user
== user
) {
1184 rcvr
->chans
&= ~chans
;
1185 if (rcvr
->chans
== 0) {
1186 list_del_rcu(&rcvr
->link
);
1192 mutex_unlock(&intf
->cmd_rcvrs_mutex
);
1202 void ipmi_user_set_run_to_completion(ipmi_user_t user
, int val
)
1204 ipmi_smi_t intf
= user
->intf
;
1206 intf
->handlers
->set_run_to_completion(intf
->send_info
, val
);
1209 static unsigned char
1210 ipmb_checksum(unsigned char *data
, int size
)
1212 unsigned char csum
= 0;
1214 for (; size
> 0; size
--, data
++)
1220 static inline void format_ipmb_msg(struct ipmi_smi_msg
*smi_msg
,
1221 struct kernel_ipmi_msg
*msg
,
1222 struct ipmi_ipmb_addr
*ipmb_addr
,
1224 unsigned char ipmb_seq
,
1226 unsigned char source_address
,
1227 unsigned char source_lun
)
1231 /* Format the IPMB header data. */
1232 smi_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
1233 smi_msg
->data
[1] = IPMI_SEND_MSG_CMD
;
1234 smi_msg
->data
[2] = ipmb_addr
->channel
;
1236 smi_msg
->data
[3] = 0;
1237 smi_msg
->data
[i
+3] = ipmb_addr
->slave_addr
;
1238 smi_msg
->data
[i
+4] = (msg
->netfn
<< 2) | (ipmb_addr
->lun
& 0x3);
1239 smi_msg
->data
[i
+5] = ipmb_checksum(&(smi_msg
->data
[i
+3]), 2);
1240 smi_msg
->data
[i
+6] = source_address
;
1241 smi_msg
->data
[i
+7] = (ipmb_seq
<< 2) | source_lun
;
1242 smi_msg
->data
[i
+8] = msg
->cmd
;
1244 /* Now tack on the data to the message. */
1245 if (msg
->data_len
> 0)
1246 memcpy(&(smi_msg
->data
[i
+9]), msg
->data
,
1248 smi_msg
->data_size
= msg
->data_len
+ 9;
1250 /* Now calculate the checksum and tack it on. */
1251 smi_msg
->data
[i
+smi_msg
->data_size
]
1252 = ipmb_checksum(&(smi_msg
->data
[i
+6]),
1253 smi_msg
->data_size
-6);
1255 /* Add on the checksum size and the offset from the
1257 smi_msg
->data_size
+= 1 + i
;
1259 smi_msg
->msgid
= msgid
;
1262 static inline void format_lan_msg(struct ipmi_smi_msg
*smi_msg
,
1263 struct kernel_ipmi_msg
*msg
,
1264 struct ipmi_lan_addr
*lan_addr
,
1266 unsigned char ipmb_seq
,
1267 unsigned char source_lun
)
1269 /* Format the IPMB header data. */
1270 smi_msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
1271 smi_msg
->data
[1] = IPMI_SEND_MSG_CMD
;
1272 smi_msg
->data
[2] = lan_addr
->channel
;
1273 smi_msg
->data
[3] = lan_addr
->session_handle
;
1274 smi_msg
->data
[4] = lan_addr
->remote_SWID
;
1275 smi_msg
->data
[5] = (msg
->netfn
<< 2) | (lan_addr
->lun
& 0x3);
1276 smi_msg
->data
[6] = ipmb_checksum(&(smi_msg
->data
[4]), 2);
1277 smi_msg
->data
[7] = lan_addr
->local_SWID
;
1278 smi_msg
->data
[8] = (ipmb_seq
<< 2) | source_lun
;
1279 smi_msg
->data
[9] = msg
->cmd
;
1281 /* Now tack on the data to the message. */
1282 if (msg
->data_len
> 0)
1283 memcpy(&(smi_msg
->data
[10]), msg
->data
,
1285 smi_msg
->data_size
= msg
->data_len
+ 10;
1287 /* Now calculate the checksum and tack it on. */
1288 smi_msg
->data
[smi_msg
->data_size
]
1289 = ipmb_checksum(&(smi_msg
->data
[7]),
1290 smi_msg
->data_size
-7);
1292 /* Add on the checksum size and the offset from the
1294 smi_msg
->data_size
+= 1;
1296 smi_msg
->msgid
= msgid
;
1299 /* Separate from ipmi_request so that the user does not have to be
1300 supplied in certain circumstances (mainly at panic time). If
1301 messages are supplied, they will be freed, even if an error
1303 static int i_ipmi_request(ipmi_user_t user
,
1305 struct ipmi_addr
*addr
,
1307 struct kernel_ipmi_msg
*msg
,
1308 void *user_msg_data
,
1310 struct ipmi_recv_msg
*supplied_recv
,
1312 unsigned char source_address
,
1313 unsigned char source_lun
,
1315 unsigned int retry_time_ms
)
1318 struct ipmi_smi_msg
*smi_msg
;
1319 struct ipmi_recv_msg
*recv_msg
;
1320 unsigned long flags
;
1321 struct ipmi_smi_handlers
*handlers
;
1324 if (supplied_recv
) {
1325 recv_msg
= supplied_recv
;
1327 recv_msg
= ipmi_alloc_recv_msg();
1328 if (recv_msg
== NULL
) {
1332 recv_msg
->user_msg_data
= user_msg_data
;
1335 smi_msg
= (struct ipmi_smi_msg
*) supplied_smi
;
1337 smi_msg
= ipmi_alloc_smi_msg();
1338 if (smi_msg
== NULL
) {
1339 ipmi_free_recv_msg(recv_msg
);
1345 handlers
= intf
->handlers
;
1351 recv_msg
->user
= user
;
1353 kref_get(&user
->refcount
);
1354 recv_msg
->msgid
= msgid
;
1355 /* Store the message to send in the receive message so timeout
1356 responses can get the proper response data. */
1357 recv_msg
->msg
= *msg
;
1359 if (addr
->addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
) {
1360 struct ipmi_system_interface_addr
*smi_addr
;
1362 if (msg
->netfn
& 1) {
1363 /* Responses are not allowed to the SMI. */
1368 smi_addr
= (struct ipmi_system_interface_addr
*) addr
;
1369 if (smi_addr
->lun
> 3) {
1370 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1371 intf
->sent_invalid_commands
++;
1372 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1377 memcpy(&recv_msg
->addr
, smi_addr
, sizeof(*smi_addr
));
1379 if ((msg
->netfn
== IPMI_NETFN_APP_REQUEST
)
1380 && ((msg
->cmd
== IPMI_SEND_MSG_CMD
)
1381 || (msg
->cmd
== IPMI_GET_MSG_CMD
)
1382 || (msg
->cmd
== IPMI_READ_EVENT_MSG_BUFFER_CMD
)))
1384 /* We don't let the user do these, since we manage
1385 the sequence numbers. */
1386 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1387 intf
->sent_invalid_commands
++;
1388 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1393 if (((msg
->netfn
== IPMI_NETFN_APP_REQUEST
)
1394 && ((msg
->cmd
== IPMI_COLD_RESET_CMD
)
1395 || (msg
->cmd
== IPMI_WARM_RESET_CMD
)))
1396 || (msg
->netfn
== IPMI_NETFN_FIRMWARE_REQUEST
))
1398 spin_lock_irqsave(&intf
->maintenance_mode_lock
, flags
);
1399 intf
->auto_maintenance_timeout
1400 = IPMI_MAINTENANCE_MODE_TIMEOUT
;
1401 if (!intf
->maintenance_mode
1402 && !intf
->maintenance_mode_enable
)
1404 intf
->maintenance_mode_enable
= 1;
1405 maintenance_mode_update(intf
);
1407 spin_unlock_irqrestore(&intf
->maintenance_mode_lock
,
1411 if ((msg
->data_len
+ 2) > IPMI_MAX_MSG_LENGTH
) {
1412 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1413 intf
->sent_invalid_commands
++;
1414 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1419 smi_msg
->data
[0] = (msg
->netfn
<< 2) | (smi_addr
->lun
& 0x3);
1420 smi_msg
->data
[1] = msg
->cmd
;
1421 smi_msg
->msgid
= msgid
;
1422 smi_msg
->user_data
= recv_msg
;
1423 if (msg
->data_len
> 0)
1424 memcpy(&(smi_msg
->data
[2]), msg
->data
, msg
->data_len
);
1425 smi_msg
->data_size
= msg
->data_len
+ 2;
1426 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1427 intf
->sent_local_commands
++;
1428 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1429 } else if ((addr
->addr_type
== IPMI_IPMB_ADDR_TYPE
)
1430 || (addr
->addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
))
1432 struct ipmi_ipmb_addr
*ipmb_addr
;
1433 unsigned char ipmb_seq
;
1437 if (addr
->channel
>= IPMI_MAX_CHANNELS
) {
1438 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1439 intf
->sent_invalid_commands
++;
1440 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1445 if (intf
->channels
[addr
->channel
].medium
1446 != IPMI_CHANNEL_MEDIUM_IPMB
)
1448 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1449 intf
->sent_invalid_commands
++;
1450 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1456 if (addr
->addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
)
1457 retries
= 0; /* Don't retry broadcasts. */
1461 if (addr
->addr_type
== IPMI_IPMB_BROADCAST_ADDR_TYPE
) {
1462 /* Broadcasts add a zero at the beginning of the
1463 message, but otherwise is the same as an IPMB
1465 addr
->addr_type
= IPMI_IPMB_ADDR_TYPE
;
1470 /* Default to 1 second retries. */
1471 if (retry_time_ms
== 0)
1472 retry_time_ms
= 1000;
1474 /* 9 for the header and 1 for the checksum, plus
1475 possibly one for the broadcast. */
1476 if ((msg
->data_len
+ 10 + broadcast
) > IPMI_MAX_MSG_LENGTH
) {
1477 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1478 intf
->sent_invalid_commands
++;
1479 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1484 ipmb_addr
= (struct ipmi_ipmb_addr
*) addr
;
1485 if (ipmb_addr
->lun
> 3) {
1486 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1487 intf
->sent_invalid_commands
++;
1488 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1493 memcpy(&recv_msg
->addr
, ipmb_addr
, sizeof(*ipmb_addr
));
1495 if (recv_msg
->msg
.netfn
& 0x1) {
1496 /* It's a response, so use the user's sequence
1498 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1499 intf
->sent_ipmb_responses
++;
1500 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1501 format_ipmb_msg(smi_msg
, msg
, ipmb_addr
, msgid
,
1503 source_address
, source_lun
);
1505 /* Save the receive message so we can use it
1506 to deliver the response. */
1507 smi_msg
->user_data
= recv_msg
;
1509 /* It's a command, so get a sequence for it. */
1511 spin_lock_irqsave(&(intf
->seq_lock
), flags
);
1513 spin_lock(&intf
->counter_lock
);
1514 intf
->sent_ipmb_commands
++;
1515 spin_unlock(&intf
->counter_lock
);
1517 /* Create a sequence number with a 1 second
1518 timeout and 4 retries. */
1519 rv
= intf_next_seq(intf
,
1527 /* We have used up all the sequence numbers,
1528 probably, so abort. */
1529 spin_unlock_irqrestore(&(intf
->seq_lock
),
1534 /* Store the sequence number in the message,
1535 so that when the send message response
1536 comes back we can start the timer. */
1537 format_ipmb_msg(smi_msg
, msg
, ipmb_addr
,
1538 STORE_SEQ_IN_MSGID(ipmb_seq
, seqid
),
1539 ipmb_seq
, broadcast
,
1540 source_address
, source_lun
);
1542 /* Copy the message into the recv message data, so we
1543 can retransmit it later if necessary. */
1544 memcpy(recv_msg
->msg_data
, smi_msg
->data
,
1545 smi_msg
->data_size
);
1546 recv_msg
->msg
.data
= recv_msg
->msg_data
;
1547 recv_msg
->msg
.data_len
= smi_msg
->data_size
;
1549 /* We don't unlock until here, because we need
1550 to copy the completed message into the
1551 recv_msg before we release the lock.
1552 Otherwise, race conditions may bite us. I
1553 know that's pretty paranoid, but I prefer
1555 spin_unlock_irqrestore(&(intf
->seq_lock
), flags
);
1557 } else if (addr
->addr_type
== IPMI_LAN_ADDR_TYPE
) {
1558 struct ipmi_lan_addr
*lan_addr
;
1559 unsigned char ipmb_seq
;
1562 if (addr
->channel
>= IPMI_MAX_CHANNELS
) {
1563 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1564 intf
->sent_invalid_commands
++;
1565 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1570 if ((intf
->channels
[addr
->channel
].medium
1571 != IPMI_CHANNEL_MEDIUM_8023LAN
)
1572 && (intf
->channels
[addr
->channel
].medium
1573 != IPMI_CHANNEL_MEDIUM_ASYNC
))
1575 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1576 intf
->sent_invalid_commands
++;
1577 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1584 /* Default to 1 second retries. */
1585 if (retry_time_ms
== 0)
1586 retry_time_ms
= 1000;
1588 /* 11 for the header and 1 for the checksum. */
1589 if ((msg
->data_len
+ 12) > IPMI_MAX_MSG_LENGTH
) {
1590 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1591 intf
->sent_invalid_commands
++;
1592 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1597 lan_addr
= (struct ipmi_lan_addr
*) addr
;
1598 if (lan_addr
->lun
> 3) {
1599 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1600 intf
->sent_invalid_commands
++;
1601 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1606 memcpy(&recv_msg
->addr
, lan_addr
, sizeof(*lan_addr
));
1608 if (recv_msg
->msg
.netfn
& 0x1) {
1609 /* It's a response, so use the user's sequence
1611 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1612 intf
->sent_lan_responses
++;
1613 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1614 format_lan_msg(smi_msg
, msg
, lan_addr
, msgid
,
1617 /* Save the receive message so we can use it
1618 to deliver the response. */
1619 smi_msg
->user_data
= recv_msg
;
1621 /* It's a command, so get a sequence for it. */
1623 spin_lock_irqsave(&(intf
->seq_lock
), flags
);
1625 spin_lock(&intf
->counter_lock
);
1626 intf
->sent_lan_commands
++;
1627 spin_unlock(&intf
->counter_lock
);
1629 /* Create a sequence number with a 1 second
1630 timeout and 4 retries. */
1631 rv
= intf_next_seq(intf
,
1639 /* We have used up all the sequence numbers,
1640 probably, so abort. */
1641 spin_unlock_irqrestore(&(intf
->seq_lock
),
1646 /* Store the sequence number in the message,
1647 so that when the send message response
1648 comes back we can start the timer. */
1649 format_lan_msg(smi_msg
, msg
, lan_addr
,
1650 STORE_SEQ_IN_MSGID(ipmb_seq
, seqid
),
1651 ipmb_seq
, source_lun
);
1653 /* Copy the message into the recv message data, so we
1654 can retransmit it later if necessary. */
1655 memcpy(recv_msg
->msg_data
, smi_msg
->data
,
1656 smi_msg
->data_size
);
1657 recv_msg
->msg
.data
= recv_msg
->msg_data
;
1658 recv_msg
->msg
.data_len
= smi_msg
->data_size
;
1660 /* We don't unlock until here, because we need
1661 to copy the completed message into the
1662 recv_msg before we release the lock.
1663 Otherwise, race conditions may bite us. I
1664 know that's pretty paranoid, but I prefer
1666 spin_unlock_irqrestore(&(intf
->seq_lock
), flags
);
1669 /* Unknown address type. */
1670 spin_lock_irqsave(&intf
->counter_lock
, flags
);
1671 intf
->sent_invalid_commands
++;
1672 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
1680 for (m
= 0; m
< smi_msg
->data_size
; m
++)
1681 printk(" %2.2x", smi_msg
->data
[m
]);
1686 handlers
->sender(intf
->send_info
, smi_msg
, priority
);
1693 ipmi_free_smi_msg(smi_msg
);
1694 ipmi_free_recv_msg(recv_msg
);
1698 static int check_addr(ipmi_smi_t intf
,
1699 struct ipmi_addr
*addr
,
1700 unsigned char *saddr
,
1703 if (addr
->channel
>= IPMI_MAX_CHANNELS
)
1705 *lun
= intf
->channels
[addr
->channel
].lun
;
1706 *saddr
= intf
->channels
[addr
->channel
].address
;
1710 int ipmi_request_settime(ipmi_user_t user
,
1711 struct ipmi_addr
*addr
,
1713 struct kernel_ipmi_msg
*msg
,
1714 void *user_msg_data
,
1717 unsigned int retry_time_ms
)
1719 unsigned char saddr
, lun
;
1724 rv
= check_addr(user
->intf
, addr
, &saddr
, &lun
);
1727 return i_ipmi_request(user
,
1741 int ipmi_request_supply_msgs(ipmi_user_t user
,
1742 struct ipmi_addr
*addr
,
1744 struct kernel_ipmi_msg
*msg
,
1745 void *user_msg_data
,
1747 struct ipmi_recv_msg
*supplied_recv
,
1750 unsigned char saddr
, lun
;
1755 rv
= check_addr(user
->intf
, addr
, &saddr
, &lun
);
1758 return i_ipmi_request(user
,
1772 #ifdef CONFIG_PROC_FS
1773 static int ipmb_file_read_proc(char *page
, char **start
, off_t off
,
1774 int count
, int *eof
, void *data
)
1776 char *out
= (char *) page
;
1777 ipmi_smi_t intf
= data
;
1781 for (i
= 0; i
< IPMI_MAX_CHANNELS
; i
++)
1782 rv
+= sprintf(out
+rv
, "%x ", intf
->channels
[i
].address
);
1783 out
[rv
-1] = '\n'; /* Replace the final space with a newline */
1789 static int version_file_read_proc(char *page
, char **start
, off_t off
,
1790 int count
, int *eof
, void *data
)
1792 char *out
= (char *) page
;
1793 ipmi_smi_t intf
= data
;
1795 return sprintf(out
, "%d.%d\n",
1796 ipmi_version_major(&intf
->bmc
->id
),
1797 ipmi_version_minor(&intf
->bmc
->id
));
1800 static int stat_file_read_proc(char *page
, char **start
, off_t off
,
1801 int count
, int *eof
, void *data
)
1803 char *out
= (char *) page
;
1804 ipmi_smi_t intf
= data
;
1806 out
+= sprintf(out
, "sent_invalid_commands: %d\n",
1807 intf
->sent_invalid_commands
);
1808 out
+= sprintf(out
, "sent_local_commands: %d\n",
1809 intf
->sent_local_commands
);
1810 out
+= sprintf(out
, "handled_local_responses: %d\n",
1811 intf
->handled_local_responses
);
1812 out
+= sprintf(out
, "unhandled_local_responses: %d\n",
1813 intf
->unhandled_local_responses
);
1814 out
+= sprintf(out
, "sent_ipmb_commands: %d\n",
1815 intf
->sent_ipmb_commands
);
1816 out
+= sprintf(out
, "sent_ipmb_command_errs: %d\n",
1817 intf
->sent_ipmb_command_errs
);
1818 out
+= sprintf(out
, "retransmitted_ipmb_commands: %d\n",
1819 intf
->retransmitted_ipmb_commands
);
1820 out
+= sprintf(out
, "timed_out_ipmb_commands: %d\n",
1821 intf
->timed_out_ipmb_commands
);
1822 out
+= sprintf(out
, "timed_out_ipmb_broadcasts: %d\n",
1823 intf
->timed_out_ipmb_broadcasts
);
1824 out
+= sprintf(out
, "sent_ipmb_responses: %d\n",
1825 intf
->sent_ipmb_responses
);
1826 out
+= sprintf(out
, "handled_ipmb_responses: %d\n",
1827 intf
->handled_ipmb_responses
);
1828 out
+= sprintf(out
, "invalid_ipmb_responses: %d\n",
1829 intf
->invalid_ipmb_responses
);
1830 out
+= sprintf(out
, "unhandled_ipmb_responses: %d\n",
1831 intf
->unhandled_ipmb_responses
);
1832 out
+= sprintf(out
, "sent_lan_commands: %d\n",
1833 intf
->sent_lan_commands
);
1834 out
+= sprintf(out
, "sent_lan_command_errs: %d\n",
1835 intf
->sent_lan_command_errs
);
1836 out
+= sprintf(out
, "retransmitted_lan_commands: %d\n",
1837 intf
->retransmitted_lan_commands
);
1838 out
+= sprintf(out
, "timed_out_lan_commands: %d\n",
1839 intf
->timed_out_lan_commands
);
1840 out
+= sprintf(out
, "sent_lan_responses: %d\n",
1841 intf
->sent_lan_responses
);
1842 out
+= sprintf(out
, "handled_lan_responses: %d\n",
1843 intf
->handled_lan_responses
);
1844 out
+= sprintf(out
, "invalid_lan_responses: %d\n",
1845 intf
->invalid_lan_responses
);
1846 out
+= sprintf(out
, "unhandled_lan_responses: %d\n",
1847 intf
->unhandled_lan_responses
);
1848 out
+= sprintf(out
, "handled_commands: %d\n",
1849 intf
->handled_commands
);
1850 out
+= sprintf(out
, "invalid_commands: %d\n",
1851 intf
->invalid_commands
);
1852 out
+= sprintf(out
, "unhandled_commands: %d\n",
1853 intf
->unhandled_commands
);
1854 out
+= sprintf(out
, "invalid_events: %d\n",
1855 intf
->invalid_events
);
1856 out
+= sprintf(out
, "events: %d\n",
1859 return (out
- ((char *) page
));
1861 #endif /* CONFIG_PROC_FS */
1863 int ipmi_smi_add_proc_entry(ipmi_smi_t smi
, char *name
,
1864 read_proc_t
*read_proc
, write_proc_t
*write_proc
,
1865 void *data
, struct module
*owner
)
1868 #ifdef CONFIG_PROC_FS
1869 struct proc_dir_entry
*file
;
1870 struct ipmi_proc_entry
*entry
;
1872 /* Create a list element. */
1873 entry
= kmalloc(sizeof(*entry
), GFP_KERNEL
);
1876 entry
->name
= kmalloc(strlen(name
)+1, GFP_KERNEL
);
1881 strcpy(entry
->name
, name
);
1883 file
= create_proc_entry(name
, 0, smi
->proc_dir
);
1890 file
->read_proc
= read_proc
;
1891 file
->write_proc
= write_proc
;
1892 file
->owner
= owner
;
1894 spin_lock(&smi
->proc_entry_lock
);
1895 /* Stick it on the list. */
1896 entry
->next
= smi
->proc_entries
;
1897 smi
->proc_entries
= entry
;
1898 spin_unlock(&smi
->proc_entry_lock
);
1900 #endif /* CONFIG_PROC_FS */
1905 static int add_proc_entries(ipmi_smi_t smi
, int num
)
1909 #ifdef CONFIG_PROC_FS
1910 sprintf(smi
->proc_dir_name
, "%d", num
);
1911 smi
->proc_dir
= proc_mkdir(smi
->proc_dir_name
, proc_ipmi_root
);
1915 smi
->proc_dir
->owner
= THIS_MODULE
;
1919 rv
= ipmi_smi_add_proc_entry(smi
, "stats",
1920 stat_file_read_proc
, NULL
,
1924 rv
= ipmi_smi_add_proc_entry(smi
, "ipmb",
1925 ipmb_file_read_proc
, NULL
,
1929 rv
= ipmi_smi_add_proc_entry(smi
, "version",
1930 version_file_read_proc
, NULL
,
1932 #endif /* CONFIG_PROC_FS */
1937 static void remove_proc_entries(ipmi_smi_t smi
)
1939 #ifdef CONFIG_PROC_FS
1940 struct ipmi_proc_entry
*entry
;
1942 spin_lock(&smi
->proc_entry_lock
);
1943 while (smi
->proc_entries
) {
1944 entry
= smi
->proc_entries
;
1945 smi
->proc_entries
= entry
->next
;
1947 remove_proc_entry(entry
->name
, smi
->proc_dir
);
1951 spin_unlock(&smi
->proc_entry_lock
);
1952 remove_proc_entry(smi
->proc_dir_name
, proc_ipmi_root
);
1953 #endif /* CONFIG_PROC_FS */
1956 static int __find_bmc_guid(struct device
*dev
, void *data
)
1958 unsigned char *id
= data
;
1959 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
1960 return memcmp(bmc
->guid
, id
, 16) == 0;
1963 static struct bmc_device
*ipmi_find_bmc_guid(struct device_driver
*drv
,
1964 unsigned char *guid
)
1968 dev
= driver_find_device(drv
, NULL
, guid
, __find_bmc_guid
);
1970 return dev_get_drvdata(dev
);
1975 struct prod_dev_id
{
1976 unsigned int product_id
;
1977 unsigned char device_id
;
1980 static int __find_bmc_prod_dev_id(struct device
*dev
, void *data
)
1982 struct prod_dev_id
*id
= data
;
1983 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
1985 return (bmc
->id
.product_id
== id
->product_id
1986 && bmc
->id
.device_id
== id
->device_id
);
1989 static struct bmc_device
*ipmi_find_bmc_prod_dev_id(
1990 struct device_driver
*drv
,
1991 unsigned int product_id
, unsigned char device_id
)
1993 struct prod_dev_id id
= {
1994 .product_id
= product_id
,
1995 .device_id
= device_id
,
1999 dev
= driver_find_device(drv
, NULL
, &id
, __find_bmc_prod_dev_id
);
2001 return dev_get_drvdata(dev
);
2006 static ssize_t
device_id_show(struct device
*dev
,
2007 struct device_attribute
*attr
,
2010 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2012 return snprintf(buf
, 10, "%u\n", bmc
->id
.device_id
);
2015 static ssize_t
provides_dev_sdrs_show(struct device
*dev
,
2016 struct device_attribute
*attr
,
2019 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2021 return snprintf(buf
, 10, "%u\n",
2022 (bmc
->id
.device_revision
& 0x80) >> 7);
2025 static ssize_t
revision_show(struct device
*dev
, struct device_attribute
*attr
,
2028 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2030 return snprintf(buf
, 20, "%u\n",
2031 bmc
->id
.device_revision
& 0x0F);
2034 static ssize_t
firmware_rev_show(struct device
*dev
,
2035 struct device_attribute
*attr
,
2038 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2040 return snprintf(buf
, 20, "%u.%x\n", bmc
->id
.firmware_revision_1
,
2041 bmc
->id
.firmware_revision_2
);
2044 static ssize_t
ipmi_version_show(struct device
*dev
,
2045 struct device_attribute
*attr
,
2048 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2050 return snprintf(buf
, 20, "%u.%u\n",
2051 ipmi_version_major(&bmc
->id
),
2052 ipmi_version_minor(&bmc
->id
));
2055 static ssize_t
add_dev_support_show(struct device
*dev
,
2056 struct device_attribute
*attr
,
2059 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2061 return snprintf(buf
, 10, "0x%02x\n",
2062 bmc
->id
.additional_device_support
);
2065 static ssize_t
manufacturer_id_show(struct device
*dev
,
2066 struct device_attribute
*attr
,
2069 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2071 return snprintf(buf
, 20, "0x%6.6x\n", bmc
->id
.manufacturer_id
);
2074 static ssize_t
product_id_show(struct device
*dev
,
2075 struct device_attribute
*attr
,
2078 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2080 return snprintf(buf
, 10, "0x%4.4x\n", bmc
->id
.product_id
);
2083 static ssize_t
aux_firmware_rev_show(struct device
*dev
,
2084 struct device_attribute
*attr
,
2087 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2089 return snprintf(buf
, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2090 bmc
->id
.aux_firmware_revision
[3],
2091 bmc
->id
.aux_firmware_revision
[2],
2092 bmc
->id
.aux_firmware_revision
[1],
2093 bmc
->id
.aux_firmware_revision
[0]);
2096 static ssize_t
guid_show(struct device
*dev
, struct device_attribute
*attr
,
2099 struct bmc_device
*bmc
= dev_get_drvdata(dev
);
2101 return snprintf(buf
, 100, "%Lx%Lx\n",
2102 (long long) bmc
->guid
[0],
2103 (long long) bmc
->guid
[8]);
2106 static void remove_files(struct bmc_device
*bmc
)
2111 device_remove_file(&bmc
->dev
->dev
,
2112 &bmc
->device_id_attr
);
2113 device_remove_file(&bmc
->dev
->dev
,
2114 &bmc
->provides_dev_sdrs_attr
);
2115 device_remove_file(&bmc
->dev
->dev
,
2116 &bmc
->revision_attr
);
2117 device_remove_file(&bmc
->dev
->dev
,
2118 &bmc
->firmware_rev_attr
);
2119 device_remove_file(&bmc
->dev
->dev
,
2120 &bmc
->version_attr
);
2121 device_remove_file(&bmc
->dev
->dev
,
2122 &bmc
->add_dev_support_attr
);
2123 device_remove_file(&bmc
->dev
->dev
,
2124 &bmc
->manufacturer_id_attr
);
2125 device_remove_file(&bmc
->dev
->dev
,
2126 &bmc
->product_id_attr
);
2128 if (bmc
->id
.aux_firmware_revision_set
)
2129 device_remove_file(&bmc
->dev
->dev
,
2130 &bmc
->aux_firmware_rev_attr
);
2132 device_remove_file(&bmc
->dev
->dev
,
2137 cleanup_bmc_device(struct kref
*ref
)
2139 struct bmc_device
*bmc
;
2141 bmc
= container_of(ref
, struct bmc_device
, refcount
);
2144 platform_device_unregister(bmc
->dev
);
2148 static void ipmi_bmc_unregister(ipmi_smi_t intf
)
2150 struct bmc_device
*bmc
= intf
->bmc
;
2152 if (intf
->sysfs_name
) {
2153 sysfs_remove_link(&intf
->si_dev
->kobj
, intf
->sysfs_name
);
2154 kfree(intf
->sysfs_name
);
2155 intf
->sysfs_name
= NULL
;
2157 if (intf
->my_dev_name
) {
2158 sysfs_remove_link(&bmc
->dev
->dev
.kobj
, intf
->my_dev_name
);
2159 kfree(intf
->my_dev_name
);
2160 intf
->my_dev_name
= NULL
;
2163 mutex_lock(&ipmidriver_mutex
);
2164 kref_put(&bmc
->refcount
, cleanup_bmc_device
);
2166 mutex_unlock(&ipmidriver_mutex
);
2169 static int create_files(struct bmc_device
*bmc
)
2173 bmc
->device_id_attr
.attr
.name
= "device_id";
2174 bmc
->device_id_attr
.attr
.owner
= THIS_MODULE
;
2175 bmc
->device_id_attr
.attr
.mode
= S_IRUGO
;
2176 bmc
->device_id_attr
.show
= device_id_show
;
2178 bmc
->provides_dev_sdrs_attr
.attr
.name
= "provides_device_sdrs";
2179 bmc
->provides_dev_sdrs_attr
.attr
.owner
= THIS_MODULE
;
2180 bmc
->provides_dev_sdrs_attr
.attr
.mode
= S_IRUGO
;
2181 bmc
->provides_dev_sdrs_attr
.show
= provides_dev_sdrs_show
;
2183 bmc
->revision_attr
.attr
.name
= "revision";
2184 bmc
->revision_attr
.attr
.owner
= THIS_MODULE
;
2185 bmc
->revision_attr
.attr
.mode
= S_IRUGO
;
2186 bmc
->revision_attr
.show
= revision_show
;
2188 bmc
->firmware_rev_attr
.attr
.name
= "firmware_revision";
2189 bmc
->firmware_rev_attr
.attr
.owner
= THIS_MODULE
;
2190 bmc
->firmware_rev_attr
.attr
.mode
= S_IRUGO
;
2191 bmc
->firmware_rev_attr
.show
= firmware_rev_show
;
2193 bmc
->version_attr
.attr
.name
= "ipmi_version";
2194 bmc
->version_attr
.attr
.owner
= THIS_MODULE
;
2195 bmc
->version_attr
.attr
.mode
= S_IRUGO
;
2196 bmc
->version_attr
.show
= ipmi_version_show
;
2198 bmc
->add_dev_support_attr
.attr
.name
= "additional_device_support";
2199 bmc
->add_dev_support_attr
.attr
.owner
= THIS_MODULE
;
2200 bmc
->add_dev_support_attr
.attr
.mode
= S_IRUGO
;
2201 bmc
->add_dev_support_attr
.show
= add_dev_support_show
;
2203 bmc
->manufacturer_id_attr
.attr
.name
= "manufacturer_id";
2204 bmc
->manufacturer_id_attr
.attr
.owner
= THIS_MODULE
;
2205 bmc
->manufacturer_id_attr
.attr
.mode
= S_IRUGO
;
2206 bmc
->manufacturer_id_attr
.show
= manufacturer_id_show
;
2208 bmc
->product_id_attr
.attr
.name
= "product_id";
2209 bmc
->product_id_attr
.attr
.owner
= THIS_MODULE
;
2210 bmc
->product_id_attr
.attr
.mode
= S_IRUGO
;
2211 bmc
->product_id_attr
.show
= product_id_show
;
2213 bmc
->guid_attr
.attr
.name
= "guid";
2214 bmc
->guid_attr
.attr
.owner
= THIS_MODULE
;
2215 bmc
->guid_attr
.attr
.mode
= S_IRUGO
;
2216 bmc
->guid_attr
.show
= guid_show
;
2218 bmc
->aux_firmware_rev_attr
.attr
.name
= "aux_firmware_revision";
2219 bmc
->aux_firmware_rev_attr
.attr
.owner
= THIS_MODULE
;
2220 bmc
->aux_firmware_rev_attr
.attr
.mode
= S_IRUGO
;
2221 bmc
->aux_firmware_rev_attr
.show
= aux_firmware_rev_show
;
2223 err
= device_create_file(&bmc
->dev
->dev
,
2224 &bmc
->device_id_attr
);
2226 err
= device_create_file(&bmc
->dev
->dev
,
2227 &bmc
->provides_dev_sdrs_attr
);
2228 if (err
) goto out_devid
;
2229 err
= device_create_file(&bmc
->dev
->dev
,
2230 &bmc
->revision_attr
);
2231 if (err
) goto out_sdrs
;
2232 err
= device_create_file(&bmc
->dev
->dev
,
2233 &bmc
->firmware_rev_attr
);
2234 if (err
) goto out_rev
;
2235 err
= device_create_file(&bmc
->dev
->dev
,
2236 &bmc
->version_attr
);
2237 if (err
) goto out_firm
;
2238 err
= device_create_file(&bmc
->dev
->dev
,
2239 &bmc
->add_dev_support_attr
);
2240 if (err
) goto out_version
;
2241 err
= device_create_file(&bmc
->dev
->dev
,
2242 &bmc
->manufacturer_id_attr
);
2243 if (err
) goto out_add_dev
;
2244 err
= device_create_file(&bmc
->dev
->dev
,
2245 &bmc
->product_id_attr
);
2246 if (err
) goto out_manu
;
2247 if (bmc
->id
.aux_firmware_revision_set
) {
2248 err
= device_create_file(&bmc
->dev
->dev
,
2249 &bmc
->aux_firmware_rev_attr
);
2250 if (err
) goto out_prod_id
;
2252 if (bmc
->guid_set
) {
2253 err
= device_create_file(&bmc
->dev
->dev
,
2255 if (err
) goto out_aux_firm
;
2261 if (bmc
->id
.aux_firmware_revision_set
)
2262 device_remove_file(&bmc
->dev
->dev
,
2263 &bmc
->aux_firmware_rev_attr
);
2265 device_remove_file(&bmc
->dev
->dev
,
2266 &bmc
->product_id_attr
);
2268 device_remove_file(&bmc
->dev
->dev
,
2269 &bmc
->manufacturer_id_attr
);
2271 device_remove_file(&bmc
->dev
->dev
,
2272 &bmc
->add_dev_support_attr
);
2274 device_remove_file(&bmc
->dev
->dev
,
2275 &bmc
->version_attr
);
2277 device_remove_file(&bmc
->dev
->dev
,
2278 &bmc
->firmware_rev_attr
);
2280 device_remove_file(&bmc
->dev
->dev
,
2281 &bmc
->revision_attr
);
2283 device_remove_file(&bmc
->dev
->dev
,
2284 &bmc
->provides_dev_sdrs_attr
);
2286 device_remove_file(&bmc
->dev
->dev
,
2287 &bmc
->device_id_attr
);
2292 static int ipmi_bmc_register(ipmi_smi_t intf
, int ifnum
,
2293 const char *sysfs_name
)
2296 struct bmc_device
*bmc
= intf
->bmc
;
2297 struct bmc_device
*old_bmc
;
2301 mutex_lock(&ipmidriver_mutex
);
2304 * Try to find if there is an bmc_device struct
2305 * representing the interfaced BMC already
2308 old_bmc
= ipmi_find_bmc_guid(&ipmidriver
, bmc
->guid
);
2310 old_bmc
= ipmi_find_bmc_prod_dev_id(&ipmidriver
,
2315 * If there is already an bmc_device, free the new one,
2316 * otherwise register the new BMC device
2320 intf
->bmc
= old_bmc
;
2323 kref_get(&bmc
->refcount
);
2324 mutex_unlock(&ipmidriver_mutex
);
2327 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2328 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2329 bmc
->id
.manufacturer_id
,
2334 unsigned char orig_dev_id
= bmc
->id
.device_id
;
2335 int warn_printed
= 0;
2337 snprintf(name
, sizeof(name
),
2338 "ipmi_bmc.%4.4x", bmc
->id
.product_id
);
2340 while (ipmi_find_bmc_prod_dev_id(&ipmidriver
,
2342 bmc
->id
.device_id
)) {
2343 if (!warn_printed
) {
2344 printk(KERN_WARNING PFX
2345 "This machine has two different BMCs"
2346 " with the same product id and device"
2347 " id. This is an error in the"
2348 " firmware, but incrementing the"
2349 " device id to work around the problem."
2350 " Prod ID = 0x%x, Dev ID = 0x%x\n",
2351 bmc
->id
.product_id
, bmc
->id
.device_id
);
2354 bmc
->id
.device_id
++; /* Wraps at 255 */
2355 if (bmc
->id
.device_id
== orig_dev_id
) {
2357 "Out of device ids!\n");
2362 bmc
->dev
= platform_device_alloc(name
, bmc
->id
.device_id
);
2364 mutex_unlock(&ipmidriver_mutex
);
2367 " Unable to allocate platform device\n");
2370 bmc
->dev
->dev
.driver
= &ipmidriver
;
2371 dev_set_drvdata(&bmc
->dev
->dev
, bmc
);
2372 kref_init(&bmc
->refcount
);
2374 rv
= platform_device_add(bmc
->dev
);
2375 mutex_unlock(&ipmidriver_mutex
);
2377 platform_device_put(bmc
->dev
);
2381 " Unable to register bmc device: %d\n",
2383 /* Don't go to out_err, you can only do that if
2384 the device is registered already. */
2388 rv
= create_files(bmc
);
2390 mutex_lock(&ipmidriver_mutex
);
2391 platform_device_unregister(bmc
->dev
);
2392 mutex_unlock(&ipmidriver_mutex
);
2398 "ipmi: Found new BMC (man_id: 0x%6.6x, "
2399 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2400 bmc
->id
.manufacturer_id
,
2406 * create symlink from system interface device to bmc device
2409 intf
->sysfs_name
= kstrdup(sysfs_name
, GFP_KERNEL
);
2410 if (!intf
->sysfs_name
) {
2413 "ipmi_msghandler: allocate link to BMC: %d\n",
2418 rv
= sysfs_create_link(&intf
->si_dev
->kobj
,
2419 &bmc
->dev
->dev
.kobj
, intf
->sysfs_name
);
2421 kfree(intf
->sysfs_name
);
2422 intf
->sysfs_name
= NULL
;
2424 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2429 size
= snprintf(dummy
, 0, "ipmi%d", ifnum
);
2430 intf
->my_dev_name
= kmalloc(size
+1, GFP_KERNEL
);
2431 if (!intf
->my_dev_name
) {
2432 kfree(intf
->sysfs_name
);
2433 intf
->sysfs_name
= NULL
;
2436 "ipmi_msghandler: allocate link from BMC: %d\n",
2440 snprintf(intf
->my_dev_name
, size
+1, "ipmi%d", ifnum
);
2442 rv
= sysfs_create_link(&bmc
->dev
->dev
.kobj
, &intf
->si_dev
->kobj
,
2445 kfree(intf
->sysfs_name
);
2446 intf
->sysfs_name
= NULL
;
2447 kfree(intf
->my_dev_name
);
2448 intf
->my_dev_name
= NULL
;
2451 " Unable to create symlink to bmc: %d\n",
2459 ipmi_bmc_unregister(intf
);
2464 send_guid_cmd(ipmi_smi_t intf
, int chan
)
2466 struct kernel_ipmi_msg msg
;
2467 struct ipmi_system_interface_addr si
;
2469 si
.addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
2470 si
.channel
= IPMI_BMC_CHANNEL
;
2473 msg
.netfn
= IPMI_NETFN_APP_REQUEST
;
2474 msg
.cmd
= IPMI_GET_DEVICE_GUID_CMD
;
2477 return i_ipmi_request(NULL
,
2479 (struct ipmi_addr
*) &si
,
2486 intf
->channels
[0].address
,
2487 intf
->channels
[0].lun
,
2492 guid_handler(ipmi_smi_t intf
, struct ipmi_recv_msg
*msg
)
2494 if ((msg
->addr
.addr_type
!= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
)
2495 || (msg
->msg
.netfn
!= IPMI_NETFN_APP_RESPONSE
)
2496 || (msg
->msg
.cmd
!= IPMI_GET_DEVICE_GUID_CMD
))
2500 if (msg
->msg
.data
[0] != 0) {
2501 /* Error from getting the GUID, the BMC doesn't have one. */
2502 intf
->bmc
->guid_set
= 0;
2506 if (msg
->msg
.data_len
< 17) {
2507 intf
->bmc
->guid_set
= 0;
2508 printk(KERN_WARNING PFX
2509 "guid_handler: The GUID response from the BMC was too"
2510 " short, it was %d but should have been 17. Assuming"
2511 " GUID is not available.\n",
2516 memcpy(intf
->bmc
->guid
, msg
->msg
.data
, 16);
2517 intf
->bmc
->guid_set
= 1;
2519 wake_up(&intf
->waitq
);
2523 get_guid(ipmi_smi_t intf
)
2527 intf
->bmc
->guid_set
= 0x2;
2528 intf
->null_user_handler
= guid_handler
;
2529 rv
= send_guid_cmd(intf
, 0);
2531 /* Send failed, no GUID available. */
2532 intf
->bmc
->guid_set
= 0;
2533 wait_event(intf
->waitq
, intf
->bmc
->guid_set
!= 2);
2534 intf
->null_user_handler
= NULL
;
2538 send_channel_info_cmd(ipmi_smi_t intf
, int chan
)
2540 struct kernel_ipmi_msg msg
;
2541 unsigned char data
[1];
2542 struct ipmi_system_interface_addr si
;
2544 si
.addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
2545 si
.channel
= IPMI_BMC_CHANNEL
;
2548 msg
.netfn
= IPMI_NETFN_APP_REQUEST
;
2549 msg
.cmd
= IPMI_GET_CHANNEL_INFO_CMD
;
2553 return i_ipmi_request(NULL
,
2555 (struct ipmi_addr
*) &si
,
2562 intf
->channels
[0].address
,
2563 intf
->channels
[0].lun
,
2568 channel_handler(ipmi_smi_t intf
, struct ipmi_recv_msg
*msg
)
2573 if ((msg
->addr
.addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
)
2574 && (msg
->msg
.netfn
== IPMI_NETFN_APP_RESPONSE
)
2575 && (msg
->msg
.cmd
== IPMI_GET_CHANNEL_INFO_CMD
))
2577 /* It's the one we want */
2578 if (msg
->msg
.data
[0] != 0) {
2579 /* Got an error from the channel, just go on. */
2581 if (msg
->msg
.data
[0] == IPMI_INVALID_COMMAND_ERR
) {
2582 /* If the MC does not support this
2583 command, that is legal. We just
2584 assume it has one IPMB at channel
2586 intf
->channels
[0].medium
2587 = IPMI_CHANNEL_MEDIUM_IPMB
;
2588 intf
->channels
[0].protocol
2589 = IPMI_CHANNEL_PROTOCOL_IPMB
;
2592 intf
->curr_channel
= IPMI_MAX_CHANNELS
;
2593 wake_up(&intf
->waitq
);
2598 if (msg
->msg
.data_len
< 4) {
2599 /* Message not big enough, just go on. */
2602 chan
= intf
->curr_channel
;
2603 intf
->channels
[chan
].medium
= msg
->msg
.data
[2] & 0x7f;
2604 intf
->channels
[chan
].protocol
= msg
->msg
.data
[3] & 0x1f;
2607 intf
->curr_channel
++;
2608 if (intf
->curr_channel
>= IPMI_MAX_CHANNELS
)
2609 wake_up(&intf
->waitq
);
2611 rv
= send_channel_info_cmd(intf
, intf
->curr_channel
);
2614 /* Got an error somehow, just give up. */
2615 intf
->curr_channel
= IPMI_MAX_CHANNELS
;
2616 wake_up(&intf
->waitq
);
2618 printk(KERN_WARNING PFX
2619 "Error sending channel information: %d\n",
2627 int ipmi_register_smi(struct ipmi_smi_handlers
*handlers
,
2629 struct ipmi_device_id
*device_id
,
2630 struct device
*si_dev
,
2631 const char *sysfs_name
,
2632 unsigned char slave_addr
)
2638 struct list_head
*link
;
2640 /* Make sure the driver is actually initialized, this handles
2641 problems with initialization order. */
2643 rv
= ipmi_init_msghandler();
2646 /* The init code doesn't return an error if it was turned
2647 off, but it won't initialize. Check that. */
2652 intf
= kzalloc(sizeof(*intf
), GFP_KERNEL
);
2656 intf
->ipmi_version_major
= ipmi_version_major(device_id
);
2657 intf
->ipmi_version_minor
= ipmi_version_minor(device_id
);
2659 intf
->bmc
= kzalloc(sizeof(*intf
->bmc
), GFP_KERNEL
);
2664 intf
->intf_num
= -1; /* Mark it invalid for now. */
2665 kref_init(&intf
->refcount
);
2666 intf
->bmc
->id
= *device_id
;
2667 intf
->si_dev
= si_dev
;
2668 for (j
= 0; j
< IPMI_MAX_CHANNELS
; j
++) {
2669 intf
->channels
[j
].address
= IPMI_BMC_SLAVE_ADDR
;
2670 intf
->channels
[j
].lun
= 2;
2672 if (slave_addr
!= 0)
2673 intf
->channels
[0].address
= slave_addr
;
2674 INIT_LIST_HEAD(&intf
->users
);
2675 intf
->handlers
= handlers
;
2676 intf
->send_info
= send_info
;
2677 spin_lock_init(&intf
->seq_lock
);
2678 for (j
= 0; j
< IPMI_IPMB_NUM_SEQ
; j
++) {
2679 intf
->seq_table
[j
].inuse
= 0;
2680 intf
->seq_table
[j
].seqid
= 0;
2683 #ifdef CONFIG_PROC_FS
2684 spin_lock_init(&intf
->proc_entry_lock
);
2686 spin_lock_init(&intf
->waiting_msgs_lock
);
2687 INIT_LIST_HEAD(&intf
->waiting_msgs
);
2688 spin_lock_init(&intf
->events_lock
);
2689 INIT_LIST_HEAD(&intf
->waiting_events
);
2690 intf
->waiting_events_count
= 0;
2691 mutex_init(&intf
->cmd_rcvrs_mutex
);
2692 spin_lock_init(&intf
->maintenance_mode_lock
);
2693 INIT_LIST_HEAD(&intf
->cmd_rcvrs
);
2694 init_waitqueue_head(&intf
->waitq
);
2696 spin_lock_init(&intf
->counter_lock
);
2697 intf
->proc_dir
= NULL
;
2699 mutex_lock(&smi_watchers_mutex
);
2700 mutex_lock(&ipmi_interfaces_mutex
);
2701 /* Look for a hole in the numbers. */
2703 link
= &ipmi_interfaces
;
2704 list_for_each_entry_rcu(tintf
, &ipmi_interfaces
, link
) {
2705 if (tintf
->intf_num
!= i
) {
2706 link
= &tintf
->link
;
2711 /* Add the new interface in numeric order. */
2713 list_add_rcu(&intf
->link
, &ipmi_interfaces
);
2715 list_add_tail_rcu(&intf
->link
, link
);
2717 rv
= handlers
->start_processing(send_info
, intf
);
2723 if ((intf
->ipmi_version_major
> 1)
2724 || ((intf
->ipmi_version_major
== 1)
2725 && (intf
->ipmi_version_minor
>= 5)))
2727 /* Start scanning the channels to see what is
2729 intf
->null_user_handler
= channel_handler
;
2730 intf
->curr_channel
= 0;
2731 rv
= send_channel_info_cmd(intf
, 0);
2735 /* Wait for the channel info to be read. */
2736 wait_event(intf
->waitq
,
2737 intf
->curr_channel
>= IPMI_MAX_CHANNELS
);
2738 intf
->null_user_handler
= NULL
;
2740 /* Assume a single IPMB channel at zero. */
2741 intf
->channels
[0].medium
= IPMI_CHANNEL_MEDIUM_IPMB
;
2742 intf
->channels
[0].protocol
= IPMI_CHANNEL_PROTOCOL_IPMB
;
2746 rv
= add_proc_entries(intf
, i
);
2748 rv
= ipmi_bmc_register(intf
, i
, sysfs_name
);
2753 remove_proc_entries(intf
);
2754 intf
->handlers
= NULL
;
2755 list_del_rcu(&intf
->link
);
2756 mutex_unlock(&ipmi_interfaces_mutex
);
2757 mutex_unlock(&smi_watchers_mutex
);
2759 kref_put(&intf
->refcount
, intf_free
);
2762 * Keep memory order straight for RCU readers. Make
2763 * sure everything else is committed to memory before
2764 * setting intf_num to mark the interface valid.
2768 mutex_unlock(&ipmi_interfaces_mutex
);
2769 /* After this point the interface is legal to use. */
2770 call_smi_watchers(i
, intf
->si_dev
);
2771 mutex_unlock(&smi_watchers_mutex
);
2777 static void cleanup_smi_msgs(ipmi_smi_t intf
)
2780 struct seq_table
*ent
;
2782 /* No need for locks, the interface is down. */
2783 for (i
= 0; i
< IPMI_IPMB_NUM_SEQ
; i
++) {
2784 ent
= &(intf
->seq_table
[i
]);
2787 deliver_err_response(ent
->recv_msg
, IPMI_ERR_UNSPECIFIED
);
2791 int ipmi_unregister_smi(ipmi_smi_t intf
)
2793 struct ipmi_smi_watcher
*w
;
2794 int intf_num
= intf
->intf_num
;
2796 ipmi_bmc_unregister(intf
);
2798 mutex_lock(&smi_watchers_mutex
);
2799 mutex_lock(&ipmi_interfaces_mutex
);
2800 intf
->intf_num
= -1;
2801 intf
->handlers
= NULL
;
2802 list_del_rcu(&intf
->link
);
2803 mutex_unlock(&ipmi_interfaces_mutex
);
2806 cleanup_smi_msgs(intf
);
2808 remove_proc_entries(intf
);
2810 /* Call all the watcher interfaces to tell them that
2811 an interface is gone. */
2812 list_for_each_entry(w
, &smi_watchers
, link
)
2813 w
->smi_gone(intf_num
);
2814 mutex_unlock(&smi_watchers_mutex
);
2816 kref_put(&intf
->refcount
, intf_free
);
2820 static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf
,
2821 struct ipmi_smi_msg
*msg
)
2823 struct ipmi_ipmb_addr ipmb_addr
;
2824 struct ipmi_recv_msg
*recv_msg
;
2825 unsigned long flags
;
2828 /* This is 11, not 10, because the response must contain a
2829 * completion code. */
2830 if (msg
->rsp_size
< 11) {
2831 /* Message not big enough, just ignore it. */
2832 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2833 intf
->invalid_ipmb_responses
++;
2834 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2838 if (msg
->rsp
[2] != 0) {
2839 /* An error getting the response, just ignore it. */
2843 ipmb_addr
.addr_type
= IPMI_IPMB_ADDR_TYPE
;
2844 ipmb_addr
.slave_addr
= msg
->rsp
[6];
2845 ipmb_addr
.channel
= msg
->rsp
[3] & 0x0f;
2846 ipmb_addr
.lun
= msg
->rsp
[7] & 3;
2848 /* It's a response from a remote entity. Look up the sequence
2849 number and handle the response. */
2850 if (intf_find_seq(intf
,
2854 (msg
->rsp
[4] >> 2) & (~1),
2855 (struct ipmi_addr
*) &(ipmb_addr
),
2858 /* We were unable to find the sequence number,
2859 so just nuke the message. */
2860 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2861 intf
->unhandled_ipmb_responses
++;
2862 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2866 memcpy(recv_msg
->msg_data
,
2869 /* THe other fields matched, so no need to set them, except
2870 for netfn, which needs to be the response that was
2871 returned, not the request value. */
2872 recv_msg
->msg
.netfn
= msg
->rsp
[4] >> 2;
2873 recv_msg
->msg
.data
= recv_msg
->msg_data
;
2874 recv_msg
->msg
.data_len
= msg
->rsp_size
- 10;
2875 recv_msg
->recv_type
= IPMI_RESPONSE_RECV_TYPE
;
2876 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2877 intf
->handled_ipmb_responses
++;
2878 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2879 deliver_response(recv_msg
);
2884 static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf
,
2885 struct ipmi_smi_msg
*msg
)
2887 struct cmd_rcvr
*rcvr
;
2889 unsigned char netfn
;
2892 ipmi_user_t user
= NULL
;
2893 struct ipmi_ipmb_addr
*ipmb_addr
;
2894 struct ipmi_recv_msg
*recv_msg
;
2895 unsigned long flags
;
2896 struct ipmi_smi_handlers
*handlers
;
2898 if (msg
->rsp_size
< 10) {
2899 /* Message not big enough, just ignore it. */
2900 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2901 intf
->invalid_commands
++;
2902 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2906 if (msg
->rsp
[2] != 0) {
2907 /* An error getting the response, just ignore it. */
2911 netfn
= msg
->rsp
[4] >> 2;
2913 chan
= msg
->rsp
[3] & 0xf;
2916 rcvr
= find_cmd_rcvr(intf
, netfn
, cmd
, chan
);
2919 kref_get(&user
->refcount
);
2925 /* We didn't find a user, deliver an error response. */
2926 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2927 intf
->unhandled_commands
++;
2928 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2930 msg
->data
[0] = (IPMI_NETFN_APP_REQUEST
<< 2);
2931 msg
->data
[1] = IPMI_SEND_MSG_CMD
;
2932 msg
->data
[2] = msg
->rsp
[3];
2933 msg
->data
[3] = msg
->rsp
[6];
2934 msg
->data
[4] = ((netfn
+ 1) << 2) | (msg
->rsp
[7] & 0x3);
2935 msg
->data
[5] = ipmb_checksum(&(msg
->data
[3]), 2);
2936 msg
->data
[6] = intf
->channels
[msg
->rsp
[3] & 0xf].address
;
2938 msg
->data
[7] = (msg
->rsp
[7] & 0xfc) | (msg
->rsp
[4] & 0x3);
2939 msg
->data
[8] = msg
->rsp
[8]; /* cmd */
2940 msg
->data
[9] = IPMI_INVALID_CMD_COMPLETION_CODE
;
2941 msg
->data
[10] = ipmb_checksum(&(msg
->data
[6]), 4);
2942 msg
->data_size
= 11;
2947 printk("Invalid command:");
2948 for (m
= 0; m
< msg
->data_size
; m
++)
2949 printk(" %2.2x", msg
->data
[m
]);
2954 handlers
= intf
->handlers
;
2956 handlers
->sender(intf
->send_info
, msg
, 0);
2957 /* We used the message, so return the value
2958 that causes it to not be freed or
2964 /* Deliver the message to the user. */
2965 spin_lock_irqsave(&intf
->counter_lock
, flags
);
2966 intf
->handled_commands
++;
2967 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
2969 recv_msg
= ipmi_alloc_recv_msg();
2971 /* We couldn't allocate memory for the
2972 message, so requeue it for handling
2975 kref_put(&user
->refcount
, free_user
);
2977 /* Extract the source address from the data. */
2978 ipmb_addr
= (struct ipmi_ipmb_addr
*) &recv_msg
->addr
;
2979 ipmb_addr
->addr_type
= IPMI_IPMB_ADDR_TYPE
;
2980 ipmb_addr
->slave_addr
= msg
->rsp
[6];
2981 ipmb_addr
->lun
= msg
->rsp
[7] & 3;
2982 ipmb_addr
->channel
= msg
->rsp
[3] & 0xf;
2984 /* Extract the rest of the message information
2985 from the IPMB header.*/
2986 recv_msg
->user
= user
;
2987 recv_msg
->recv_type
= IPMI_CMD_RECV_TYPE
;
2988 recv_msg
->msgid
= msg
->rsp
[7] >> 2;
2989 recv_msg
->msg
.netfn
= msg
->rsp
[4] >> 2;
2990 recv_msg
->msg
.cmd
= msg
->rsp
[8];
2991 recv_msg
->msg
.data
= recv_msg
->msg_data
;
2993 /* We chop off 10, not 9 bytes because the checksum
2994 at the end also needs to be removed. */
2995 recv_msg
->msg
.data_len
= msg
->rsp_size
- 10;
2996 memcpy(recv_msg
->msg_data
,
2998 msg
->rsp_size
- 10);
2999 deliver_response(recv_msg
);
3006 static int handle_lan_get_msg_rsp(ipmi_smi_t intf
,
3007 struct ipmi_smi_msg
*msg
)
3009 struct ipmi_lan_addr lan_addr
;
3010 struct ipmi_recv_msg
*recv_msg
;
3011 unsigned long flags
;
3014 /* This is 13, not 12, because the response must contain a
3015 * completion code. */
3016 if (msg
->rsp_size
< 13) {
3017 /* Message not big enough, just ignore it. */
3018 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3019 intf
->invalid_lan_responses
++;
3020 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3024 if (msg
->rsp
[2] != 0) {
3025 /* An error getting the response, just ignore it. */
3029 lan_addr
.addr_type
= IPMI_LAN_ADDR_TYPE
;
3030 lan_addr
.session_handle
= msg
->rsp
[4];
3031 lan_addr
.remote_SWID
= msg
->rsp
[8];
3032 lan_addr
.local_SWID
= msg
->rsp
[5];
3033 lan_addr
.channel
= msg
->rsp
[3] & 0x0f;
3034 lan_addr
.privilege
= msg
->rsp
[3] >> 4;
3035 lan_addr
.lun
= msg
->rsp
[9] & 3;
3037 /* It's a response from a remote entity. Look up the sequence
3038 number and handle the response. */
3039 if (intf_find_seq(intf
,
3043 (msg
->rsp
[6] >> 2) & (~1),
3044 (struct ipmi_addr
*) &(lan_addr
),
3047 /* We were unable to find the sequence number,
3048 so just nuke the message. */
3049 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3050 intf
->unhandled_lan_responses
++;
3051 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3055 memcpy(recv_msg
->msg_data
,
3057 msg
->rsp_size
- 11);
3058 /* The other fields matched, so no need to set them, except
3059 for netfn, which needs to be the response that was
3060 returned, not the request value. */
3061 recv_msg
->msg
.netfn
= msg
->rsp
[6] >> 2;
3062 recv_msg
->msg
.data
= recv_msg
->msg_data
;
3063 recv_msg
->msg
.data_len
= msg
->rsp_size
- 12;
3064 recv_msg
->recv_type
= IPMI_RESPONSE_RECV_TYPE
;
3065 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3066 intf
->handled_lan_responses
++;
3067 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3068 deliver_response(recv_msg
);
3073 static int handle_lan_get_msg_cmd(ipmi_smi_t intf
,
3074 struct ipmi_smi_msg
*msg
)
3076 struct cmd_rcvr
*rcvr
;
3078 unsigned char netfn
;
3081 ipmi_user_t user
= NULL
;
3082 struct ipmi_lan_addr
*lan_addr
;
3083 struct ipmi_recv_msg
*recv_msg
;
3084 unsigned long flags
;
3086 if (msg
->rsp_size
< 12) {
3087 /* Message not big enough, just ignore it. */
3088 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3089 intf
->invalid_commands
++;
3090 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3094 if (msg
->rsp
[2] != 0) {
3095 /* An error getting the response, just ignore it. */
3099 netfn
= msg
->rsp
[6] >> 2;
3101 chan
= msg
->rsp
[3] & 0xf;
3104 rcvr
= find_cmd_rcvr(intf
, netfn
, cmd
, chan
);
3107 kref_get(&user
->refcount
);
3113 /* We didn't find a user, just give up. */
3114 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3115 intf
->unhandled_commands
++;
3116 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3118 rv
= 0; /* Don't do anything with these messages, just
3119 allow them to be freed. */
3121 /* Deliver the message to the user. */
3122 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3123 intf
->handled_commands
++;
3124 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3126 recv_msg
= ipmi_alloc_recv_msg();
3128 /* We couldn't allocate memory for the
3129 message, so requeue it for handling
3132 kref_put(&user
->refcount
, free_user
);
3134 /* Extract the source address from the data. */
3135 lan_addr
= (struct ipmi_lan_addr
*) &recv_msg
->addr
;
3136 lan_addr
->addr_type
= IPMI_LAN_ADDR_TYPE
;
3137 lan_addr
->session_handle
= msg
->rsp
[4];
3138 lan_addr
->remote_SWID
= msg
->rsp
[8];
3139 lan_addr
->local_SWID
= msg
->rsp
[5];
3140 lan_addr
->lun
= msg
->rsp
[9] & 3;
3141 lan_addr
->channel
= msg
->rsp
[3] & 0xf;
3142 lan_addr
->privilege
= msg
->rsp
[3] >> 4;
3144 /* Extract the rest of the message information
3145 from the IPMB header.*/
3146 recv_msg
->user
= user
;
3147 recv_msg
->recv_type
= IPMI_CMD_RECV_TYPE
;
3148 recv_msg
->msgid
= msg
->rsp
[9] >> 2;
3149 recv_msg
->msg
.netfn
= msg
->rsp
[6] >> 2;
3150 recv_msg
->msg
.cmd
= msg
->rsp
[10];
3151 recv_msg
->msg
.data
= recv_msg
->msg_data
;
3153 /* We chop off 12, not 11 bytes because the checksum
3154 at the end also needs to be removed. */
3155 recv_msg
->msg
.data_len
= msg
->rsp_size
- 12;
3156 memcpy(recv_msg
->msg_data
,
3158 msg
->rsp_size
- 12);
3159 deliver_response(recv_msg
);
3166 static void copy_event_into_recv_msg(struct ipmi_recv_msg
*recv_msg
,
3167 struct ipmi_smi_msg
*msg
)
3169 struct ipmi_system_interface_addr
*smi_addr
;
3171 recv_msg
->msgid
= 0;
3172 smi_addr
= (struct ipmi_system_interface_addr
*) &(recv_msg
->addr
);
3173 smi_addr
->addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
3174 smi_addr
->channel
= IPMI_BMC_CHANNEL
;
3175 smi_addr
->lun
= msg
->rsp
[0] & 3;
3176 recv_msg
->recv_type
= IPMI_ASYNC_EVENT_RECV_TYPE
;
3177 recv_msg
->msg
.netfn
= msg
->rsp
[0] >> 2;
3178 recv_msg
->msg
.cmd
= msg
->rsp
[1];
3179 memcpy(recv_msg
->msg_data
, &(msg
->rsp
[3]), msg
->rsp_size
- 3);
3180 recv_msg
->msg
.data
= recv_msg
->msg_data
;
3181 recv_msg
->msg
.data_len
= msg
->rsp_size
- 3;
3184 static int handle_read_event_rsp(ipmi_smi_t intf
,
3185 struct ipmi_smi_msg
*msg
)
3187 struct ipmi_recv_msg
*recv_msg
, *recv_msg2
;
3188 struct list_head msgs
;
3191 int deliver_count
= 0;
3192 unsigned long flags
;
3194 if (msg
->rsp_size
< 19) {
3195 /* Message is too small to be an IPMB event. */
3196 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3197 intf
->invalid_events
++;
3198 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3202 if (msg
->rsp
[2] != 0) {
3203 /* An error getting the event, just ignore it. */
3207 INIT_LIST_HEAD(&msgs
);
3209 spin_lock_irqsave(&intf
->events_lock
, flags
);
3211 spin_lock(&intf
->counter_lock
);
3213 spin_unlock(&intf
->counter_lock
);
3215 /* Allocate and fill in one message for every user that is getting
3218 list_for_each_entry_rcu(user
, &intf
->users
, link
) {
3219 if (!user
->gets_events
)
3222 recv_msg
= ipmi_alloc_recv_msg();
3225 list_for_each_entry_safe(recv_msg
, recv_msg2
, &msgs
,
3227 list_del(&recv_msg
->link
);
3228 ipmi_free_recv_msg(recv_msg
);
3230 /* We couldn't allocate memory for the
3231 message, so requeue it for handling
3239 copy_event_into_recv_msg(recv_msg
, msg
);
3240 recv_msg
->user
= user
;
3241 kref_get(&user
->refcount
);
3242 list_add_tail(&(recv_msg
->link
), &msgs
);
3246 if (deliver_count
) {
3247 /* Now deliver all the messages. */
3248 list_for_each_entry_safe(recv_msg
, recv_msg2
, &msgs
, link
) {
3249 list_del(&recv_msg
->link
);
3250 deliver_response(recv_msg
);
3252 } else if (intf
->waiting_events_count
< MAX_EVENTS_IN_QUEUE
) {
3253 /* No one to receive the message, put it in queue if there's
3254 not already too many things in the queue. */
3255 recv_msg
= ipmi_alloc_recv_msg();
3257 /* We couldn't allocate memory for the
3258 message, so requeue it for handling
3264 copy_event_into_recv_msg(recv_msg
, msg
);
3265 list_add_tail(&(recv_msg
->link
), &(intf
->waiting_events
));
3266 intf
->waiting_events_count
++;
3268 /* There's too many things in the queue, discard this
3270 printk(KERN_WARNING PFX
"Event queue full, discarding an"
3271 " incoming event\n");
3275 spin_unlock_irqrestore(&(intf
->events_lock
), flags
);
3280 static int handle_bmc_rsp(ipmi_smi_t intf
,
3281 struct ipmi_smi_msg
*msg
)
3283 struct ipmi_recv_msg
*recv_msg
;
3284 unsigned long flags
;
3285 struct ipmi_user
*user
;
3287 recv_msg
= (struct ipmi_recv_msg
*) msg
->user_data
;
3288 if (recv_msg
== NULL
)
3290 printk(KERN_WARNING
"IPMI message received with no owner. This\n"
3291 "could be because of a malformed message, or\n"
3292 "because of a hardware error. Contact your\n"
3293 "hardware vender for assistance\n");
3297 user
= recv_msg
->user
;
3298 /* Make sure the user still exists. */
3299 if (user
&& !user
->valid
) {
3300 /* The user for the message went away, so give up. */
3301 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3302 intf
->unhandled_local_responses
++;
3303 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3304 ipmi_free_recv_msg(recv_msg
);
3306 struct ipmi_system_interface_addr
*smi_addr
;
3308 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3309 intf
->handled_local_responses
++;
3310 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3311 recv_msg
->recv_type
= IPMI_RESPONSE_RECV_TYPE
;
3312 recv_msg
->msgid
= msg
->msgid
;
3313 smi_addr
= ((struct ipmi_system_interface_addr
*)
3315 smi_addr
->addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
3316 smi_addr
->channel
= IPMI_BMC_CHANNEL
;
3317 smi_addr
->lun
= msg
->rsp
[0] & 3;
3318 recv_msg
->msg
.netfn
= msg
->rsp
[0] >> 2;
3319 recv_msg
->msg
.cmd
= msg
->rsp
[1];
3320 memcpy(recv_msg
->msg_data
,
3323 recv_msg
->msg
.data
= recv_msg
->msg_data
;
3324 recv_msg
->msg
.data_len
= msg
->rsp_size
- 2;
3325 deliver_response(recv_msg
);
3331 /* Handle a new message. Return 1 if the message should be requeued,
3332 0 if the message should be freed, or -1 if the message should not
3333 be freed or requeued. */
3334 static int handle_new_recv_msg(ipmi_smi_t intf
,
3335 struct ipmi_smi_msg
*msg
)
3343 for (m
= 0; m
< msg
->rsp_size
; m
++)
3344 printk(" %2.2x", msg
->rsp
[m
]);
3347 if (msg
->rsp_size
< 2) {
3348 /* Message is too small to be correct. */
3349 printk(KERN_WARNING PFX
"BMC returned to small a message"
3350 " for netfn %x cmd %x, got %d bytes\n",
3351 (msg
->data
[0] >> 2) | 1, msg
->data
[1], msg
->rsp_size
);
3353 /* Generate an error response for the message. */
3354 msg
->rsp
[0] = msg
->data
[0] | (1 << 2);
3355 msg
->rsp
[1] = msg
->data
[1];
3356 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
3358 } else if (((msg
->rsp
[0] >> 2) != ((msg
->data
[0] >> 2) | 1))/* Netfn */
3359 || (msg
->rsp
[1] != msg
->data
[1])) /* Command */
3361 /* The response is not even marginally correct. */
3362 printk(KERN_WARNING PFX
"BMC returned incorrect response,"
3363 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3364 (msg
->data
[0] >> 2) | 1, msg
->data
[1],
3365 msg
->rsp
[0] >> 2, msg
->rsp
[1]);
3367 /* Generate an error response for the message. */
3368 msg
->rsp
[0] = msg
->data
[0] | (1 << 2);
3369 msg
->rsp
[1] = msg
->data
[1];
3370 msg
->rsp
[2] = IPMI_ERR_UNSPECIFIED
;
3374 if ((msg
->rsp
[0] == ((IPMI_NETFN_APP_REQUEST
|1) << 2))
3375 && (msg
->rsp
[1] == IPMI_SEND_MSG_CMD
)
3376 && (msg
->user_data
!= NULL
))
3378 /* It's a response to a response we sent. For this we
3379 deliver a send message response to the user. */
3380 struct ipmi_recv_msg
*recv_msg
= msg
->user_data
;
3383 if (msg
->rsp_size
< 2)
3384 /* Message is too small to be correct. */
3387 chan
= msg
->data
[2] & 0x0f;
3388 if (chan
>= IPMI_MAX_CHANNELS
)
3389 /* Invalid channel number */
3395 /* Make sure the user still exists. */
3396 if (!recv_msg
->user
|| !recv_msg
->user
->valid
)
3399 recv_msg
->recv_type
= IPMI_RESPONSE_RESPONSE_TYPE
;
3400 recv_msg
->msg
.data
= recv_msg
->msg_data
;
3401 recv_msg
->msg
.data_len
= 1;
3402 recv_msg
->msg_data
[0] = msg
->rsp
[2];
3403 deliver_response(recv_msg
);
3404 } else if ((msg
->rsp
[0] == ((IPMI_NETFN_APP_REQUEST
|1) << 2))
3405 && (msg
->rsp
[1] == IPMI_GET_MSG_CMD
))
3407 /* It's from the receive queue. */
3408 chan
= msg
->rsp
[3] & 0xf;
3409 if (chan
>= IPMI_MAX_CHANNELS
) {
3410 /* Invalid channel number */
3415 switch (intf
->channels
[chan
].medium
) {
3416 case IPMI_CHANNEL_MEDIUM_IPMB
:
3417 if (msg
->rsp
[4] & 0x04) {
3418 /* It's a response, so find the
3419 requesting message and send it up. */
3420 requeue
= handle_ipmb_get_msg_rsp(intf
, msg
);
3422 /* It's a command to the SMS from some other
3423 entity. Handle that. */
3424 requeue
= handle_ipmb_get_msg_cmd(intf
, msg
);
3428 case IPMI_CHANNEL_MEDIUM_8023LAN
:
3429 case IPMI_CHANNEL_MEDIUM_ASYNC
:
3430 if (msg
->rsp
[6] & 0x04) {
3431 /* It's a response, so find the
3432 requesting message and send it up. */
3433 requeue
= handle_lan_get_msg_rsp(intf
, msg
);
3435 /* It's a command to the SMS from some other
3436 entity. Handle that. */
3437 requeue
= handle_lan_get_msg_cmd(intf
, msg
);
3442 /* We don't handle the channel type, so just
3443 * free the message. */
3447 } else if ((msg
->rsp
[0] == ((IPMI_NETFN_APP_REQUEST
|1) << 2))
3448 && (msg
->rsp
[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD
))
3450 /* It's an asyncronous event. */
3451 requeue
= handle_read_event_rsp(intf
, msg
);
3453 /* It's a response from the local BMC. */
3454 requeue
= handle_bmc_rsp(intf
, msg
);
3461 /* Handle a new message from the lower layer. */
3462 void ipmi_smi_msg_received(ipmi_smi_t intf
,
3463 struct ipmi_smi_msg
*msg
)
3465 unsigned long flags
;
3469 if ((msg
->data_size
>= 2)
3470 && (msg
->data
[0] == (IPMI_NETFN_APP_REQUEST
<< 2))
3471 && (msg
->data
[1] == IPMI_SEND_MSG_CMD
)
3472 && (msg
->user_data
== NULL
))
3474 /* This is the local response to a command send, start
3475 the timer for these. The user_data will not be
3476 NULL if this is a response send, and we will let
3477 response sends just go through. */
3479 /* Check for errors, if we get certain errors (ones
3480 that mean basically we can try again later), we
3481 ignore them and start the timer. Otherwise we
3482 report the error immediately. */
3483 if ((msg
->rsp_size
>= 3) && (msg
->rsp
[2] != 0)
3484 && (msg
->rsp
[2] != IPMI_NODE_BUSY_ERR
)
3485 && (msg
->rsp
[2] != IPMI_LOST_ARBITRATION_ERR
)
3486 && (msg
->rsp
[2] != IPMI_BUS_ERR
)
3487 && (msg
->rsp
[2] != IPMI_NAK_ON_WRITE_ERR
))
3489 int chan
= msg
->rsp
[3] & 0xf;
3491 /* Got an error sending the message, handle it. */
3492 spin_lock_irqsave(&intf
->counter_lock
, flags
);
3493 if (chan
>= IPMI_MAX_CHANNELS
)
3494 ; /* This shouldn't happen */
3495 else if ((intf
->channels
[chan
].medium
3496 == IPMI_CHANNEL_MEDIUM_8023LAN
)
3497 || (intf
->channels
[chan
].medium
3498 == IPMI_CHANNEL_MEDIUM_ASYNC
))
3499 intf
->sent_lan_command_errs
++;
3501 intf
->sent_ipmb_command_errs
++;
3502 spin_unlock_irqrestore(&intf
->counter_lock
, flags
);
3503 intf_err_seq(intf
, msg
->msgid
, msg
->rsp
[2]);
3505 /* The message was sent, start the timer. */
3506 intf_start_seq_timer(intf
, msg
->msgid
);
3509 ipmi_free_smi_msg(msg
);
3513 /* To preserve message order, if the list is not empty, we
3514 tack this message onto the end of the list. */
3515 spin_lock_irqsave(&intf
->waiting_msgs_lock
, flags
);
3516 if (!list_empty(&intf
->waiting_msgs
)) {
3517 list_add_tail(&msg
->link
, &intf
->waiting_msgs
);
3518 spin_unlock_irqrestore(&intf
->waiting_msgs_lock
, flags
);
3521 spin_unlock_irqrestore(&intf
->waiting_msgs_lock
, flags
);
3523 rv
= handle_new_recv_msg(intf
, msg
);
3525 /* Could not handle the message now, just add it to a
3526 list to handle later. */
3527 spin_lock_irqsave(&intf
->waiting_msgs_lock
, flags
);
3528 list_add_tail(&msg
->link
, &intf
->waiting_msgs
);
3529 spin_unlock_irqrestore(&intf
->waiting_msgs_lock
, flags
);
3530 } else if (rv
== 0) {
3531 ipmi_free_smi_msg(msg
);
3538 void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf
)
3543 list_for_each_entry_rcu(user
, &intf
->users
, link
) {
3544 if (!user
->handler
->ipmi_watchdog_pretimeout
)
3547 user
->handler
->ipmi_watchdog_pretimeout(user
->handler_data
);
3553 static struct ipmi_smi_msg
*
3554 smi_from_recv_msg(ipmi_smi_t intf
, struct ipmi_recv_msg
*recv_msg
,
3555 unsigned char seq
, long seqid
)
3557 struct ipmi_smi_msg
*smi_msg
= ipmi_alloc_smi_msg();
3559 /* If we can't allocate the message, then just return, we
3560 get 4 retries, so this should be ok. */
3563 memcpy(smi_msg
->data
, recv_msg
->msg
.data
, recv_msg
->msg
.data_len
);
3564 smi_msg
->data_size
= recv_msg
->msg
.data_len
;
3565 smi_msg
->msgid
= STORE_SEQ_IN_MSGID(seq
, seqid
);
3571 for (m
= 0; m
< smi_msg
->data_size
; m
++)
3572 printk(" %2.2x", smi_msg
->data
[m
]);
3579 static void check_msg_timeout(ipmi_smi_t intf
, struct seq_table
*ent
,
3580 struct list_head
*timeouts
, long timeout_period
,
3581 int slot
, unsigned long *flags
)
3583 struct ipmi_recv_msg
*msg
;
3584 struct ipmi_smi_handlers
*handlers
;
3586 if (intf
->intf_num
== -1)
3592 ent
->timeout
-= timeout_period
;
3593 if (ent
->timeout
> 0)
3596 if (ent
->retries_left
== 0) {
3597 /* The message has used all its retries. */
3599 msg
= ent
->recv_msg
;
3600 list_add_tail(&msg
->link
, timeouts
);
3601 spin_lock(&intf
->counter_lock
);
3603 intf
->timed_out_ipmb_broadcasts
++;
3604 else if (ent
->recv_msg
->addr
.addr_type
== IPMI_LAN_ADDR_TYPE
)
3605 intf
->timed_out_lan_commands
++;
3607 intf
->timed_out_ipmb_commands
++;
3608 spin_unlock(&intf
->counter_lock
);
3610 struct ipmi_smi_msg
*smi_msg
;
3611 /* More retries, send again. */
3613 /* Start with the max timer, set to normal
3614 timer after the message is sent. */
3615 ent
->timeout
= MAX_MSG_TIMEOUT
;
3616 ent
->retries_left
--;
3617 spin_lock(&intf
->counter_lock
);
3618 if (ent
->recv_msg
->addr
.addr_type
== IPMI_LAN_ADDR_TYPE
)
3619 intf
->retransmitted_lan_commands
++;
3621 intf
->retransmitted_ipmb_commands
++;
3622 spin_unlock(&intf
->counter_lock
);
3624 smi_msg
= smi_from_recv_msg(intf
, ent
->recv_msg
, slot
,
3629 spin_unlock_irqrestore(&intf
->seq_lock
, *flags
);
3631 /* Send the new message. We send with a zero
3632 * priority. It timed out, I doubt time is
3633 * that critical now, and high priority
3634 * messages are really only for messages to the
3635 * local MC, which don't get resent. */
3636 handlers
= intf
->handlers
;
3638 intf
->handlers
->sender(intf
->send_info
,
3641 ipmi_free_smi_msg(smi_msg
);
3643 spin_lock_irqsave(&intf
->seq_lock
, *flags
);
3647 static void ipmi_timeout_handler(long timeout_period
)
3650 struct list_head timeouts
;
3651 struct ipmi_recv_msg
*msg
, *msg2
;
3652 struct ipmi_smi_msg
*smi_msg
, *smi_msg2
;
3653 unsigned long flags
;
3657 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
3658 /* See if any waiting messages need to be processed. */
3659 spin_lock_irqsave(&intf
->waiting_msgs_lock
, flags
);
3660 list_for_each_entry_safe(smi_msg
, smi_msg2
,
3661 &intf
->waiting_msgs
, link
) {
3662 if (!handle_new_recv_msg(intf
, smi_msg
)) {
3663 list_del(&smi_msg
->link
);
3664 ipmi_free_smi_msg(smi_msg
);
3666 /* To preserve message order, quit if we
3667 can't handle a message. */
3671 spin_unlock_irqrestore(&intf
->waiting_msgs_lock
, flags
);
3673 /* Go through the seq table and find any messages that
3674 have timed out, putting them in the timeouts
3676 INIT_LIST_HEAD(&timeouts
);
3677 spin_lock_irqsave(&intf
->seq_lock
, flags
);
3678 for (i
= 0; i
< IPMI_IPMB_NUM_SEQ
; i
++)
3679 check_msg_timeout(intf
, &(intf
->seq_table
[i
]),
3680 &timeouts
, timeout_period
, i
,
3682 spin_unlock_irqrestore(&intf
->seq_lock
, flags
);
3684 list_for_each_entry_safe(msg
, msg2
, &timeouts
, link
)
3685 deliver_err_response(msg
, IPMI_TIMEOUT_COMPLETION_CODE
);
3688 * Maintenance mode handling. Check the timeout
3689 * optimistically before we claim the lock. It may
3690 * mean a timeout gets missed occasionally, but that
3691 * only means the timeout gets extended by one period
3692 * in that case. No big deal, and it avoids the lock
3695 if (intf
->auto_maintenance_timeout
> 0) {
3696 spin_lock_irqsave(&intf
->maintenance_mode_lock
, flags
);
3697 if (intf
->auto_maintenance_timeout
> 0) {
3698 intf
->auto_maintenance_timeout
3700 if (!intf
->maintenance_mode
3701 && (intf
->auto_maintenance_timeout
<= 0))
3703 intf
->maintenance_mode_enable
= 0;
3704 maintenance_mode_update(intf
);
3707 spin_unlock_irqrestore(&intf
->maintenance_mode_lock
,
3714 static void ipmi_request_event(void)
3717 struct ipmi_smi_handlers
*handlers
;
3720 /* Called from the timer, no need to check if handlers is
3722 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
3723 /* No event requests when in maintenance mode. */
3724 if (intf
->maintenance_mode_enable
)
3727 handlers
= intf
->handlers
;
3729 handlers
->request_events(intf
->send_info
);
3734 static struct timer_list ipmi_timer
;
3736 /* Call every ~100 ms. */
3737 #define IPMI_TIMEOUT_TIME 100
3739 /* How many jiffies does it take to get to the timeout time. */
3740 #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
3742 /* Request events from the queue every second (this is the number of
3743 IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
3744 future, IPMI will add a way to know immediately if an event is in
3745 the queue and this silliness can go away. */
3746 #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
3748 static atomic_t stop_operation
;
3749 static unsigned int ticks_to_req_ev
= IPMI_REQUEST_EV_TIME
;
3751 static void ipmi_timeout(unsigned long data
)
3753 if (atomic_read(&stop_operation
))
3757 if (ticks_to_req_ev
== 0) {
3758 ipmi_request_event();
3759 ticks_to_req_ev
= IPMI_REQUEST_EV_TIME
;
3762 ipmi_timeout_handler(IPMI_TIMEOUT_TIME
);
3764 mod_timer(&ipmi_timer
, jiffies
+ IPMI_TIMEOUT_JIFFIES
);
3768 static atomic_t smi_msg_inuse_count
= ATOMIC_INIT(0);
3769 static atomic_t recv_msg_inuse_count
= ATOMIC_INIT(0);
3771 /* FIXME - convert these to slabs. */
3772 static void free_smi_msg(struct ipmi_smi_msg
*msg
)
3774 atomic_dec(&smi_msg_inuse_count
);
3778 struct ipmi_smi_msg
*ipmi_alloc_smi_msg(void)
3780 struct ipmi_smi_msg
*rv
;
3781 rv
= kmalloc(sizeof(struct ipmi_smi_msg
), GFP_ATOMIC
);
3783 rv
->done
= free_smi_msg
;
3784 rv
->user_data
= NULL
;
3785 atomic_inc(&smi_msg_inuse_count
);
3790 static void free_recv_msg(struct ipmi_recv_msg
*msg
)
3792 atomic_dec(&recv_msg_inuse_count
);
3796 struct ipmi_recv_msg
*ipmi_alloc_recv_msg(void)
3798 struct ipmi_recv_msg
*rv
;
3800 rv
= kmalloc(sizeof(struct ipmi_recv_msg
), GFP_ATOMIC
);
3803 rv
->done
= free_recv_msg
;
3804 atomic_inc(&recv_msg_inuse_count
);
3809 void ipmi_free_recv_msg(struct ipmi_recv_msg
*msg
)
3812 kref_put(&msg
->user
->refcount
, free_user
);
3816 #ifdef CONFIG_IPMI_PANIC_EVENT
3818 static void dummy_smi_done_handler(struct ipmi_smi_msg
*msg
)
3822 static void dummy_recv_done_handler(struct ipmi_recv_msg
*msg
)
3826 #ifdef CONFIG_IPMI_PANIC_STRING
3827 static void event_receiver_fetcher(ipmi_smi_t intf
, struct ipmi_recv_msg
*msg
)
3829 if ((msg
->addr
.addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
)
3830 && (msg
->msg
.netfn
== IPMI_NETFN_SENSOR_EVENT_RESPONSE
)
3831 && (msg
->msg
.cmd
== IPMI_GET_EVENT_RECEIVER_CMD
)
3832 && (msg
->msg
.data
[0] == IPMI_CC_NO_ERROR
))
3834 /* A get event receiver command, save it. */
3835 intf
->event_receiver
= msg
->msg
.data
[1];
3836 intf
->event_receiver_lun
= msg
->msg
.data
[2] & 0x3;
3840 static void device_id_fetcher(ipmi_smi_t intf
, struct ipmi_recv_msg
*msg
)
3842 if ((msg
->addr
.addr_type
== IPMI_SYSTEM_INTERFACE_ADDR_TYPE
)
3843 && (msg
->msg
.netfn
== IPMI_NETFN_APP_RESPONSE
)
3844 && (msg
->msg
.cmd
== IPMI_GET_DEVICE_ID_CMD
)
3845 && (msg
->msg
.data
[0] == IPMI_CC_NO_ERROR
))
3847 /* A get device id command, save if we are an event
3848 receiver or generator. */
3849 intf
->local_sel_device
= (msg
->msg
.data
[6] >> 2) & 1;
3850 intf
->local_event_generator
= (msg
->msg
.data
[6] >> 5) & 1;
3855 static void send_panic_events(char *str
)
3857 struct kernel_ipmi_msg msg
;
3859 unsigned char data
[16];
3860 struct ipmi_system_interface_addr
*si
;
3861 struct ipmi_addr addr
;
3862 struct ipmi_smi_msg smi_msg
;
3863 struct ipmi_recv_msg recv_msg
;
3865 si
= (struct ipmi_system_interface_addr
*) &addr
;
3866 si
->addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
3867 si
->channel
= IPMI_BMC_CHANNEL
;
3870 /* Fill in an event telling that we have failed. */
3871 msg
.netfn
= 0x04; /* Sensor or Event. */
3872 msg
.cmd
= 2; /* Platform event command. */
3875 data
[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
3876 data
[1] = 0x03; /* This is for IPMI 1.0. */
3877 data
[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
3878 data
[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
3879 data
[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
3881 /* Put a few breadcrumbs in. Hopefully later we can add more things
3882 to make the panic events more useful. */
3889 smi_msg
.done
= dummy_smi_done_handler
;
3890 recv_msg
.done
= dummy_recv_done_handler
;
3892 /* For every registered interface, send the event. */
3893 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
3894 if (!intf
->handlers
)
3895 /* Interface is not ready. */
3898 /* Send the event announcing the panic. */
3899 intf
->handlers
->set_run_to_completion(intf
->send_info
, 1);
3900 i_ipmi_request(NULL
,
3909 intf
->channels
[0].address
,
3910 intf
->channels
[0].lun
,
3911 0, 1); /* Don't retry, and don't wait. */
3914 #ifdef CONFIG_IPMI_PANIC_STRING
3915 /* On every interface, dump a bunch of OEM event holding the
3920 /* For every registered interface, send the event. */
3921 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
3923 struct ipmi_ipmb_addr
*ipmb
;
3926 if (intf
->intf_num
== -1)
3927 /* Interface was not ready yet. */
3931 * intf_num is used as an marker to tell if the
3932 * interface is valid. Thus we need a read barrier to
3933 * make sure data fetched before checking intf_num
3938 /* First job here is to figure out where to send the
3939 OEM events. There's no way in IPMI to send OEM
3940 events using an event send command, so we have to
3941 find the SEL to put them in and stick them in
3944 /* Get capabilities from the get device id. */
3945 intf
->local_sel_device
= 0;
3946 intf
->local_event_generator
= 0;
3947 intf
->event_receiver
= 0;
3949 /* Request the device info from the local MC. */
3950 msg
.netfn
= IPMI_NETFN_APP_REQUEST
;
3951 msg
.cmd
= IPMI_GET_DEVICE_ID_CMD
;
3954 intf
->null_user_handler
= device_id_fetcher
;
3955 i_ipmi_request(NULL
,
3964 intf
->channels
[0].address
,
3965 intf
->channels
[0].lun
,
3966 0, 1); /* Don't retry, and don't wait. */
3968 if (intf
->local_event_generator
) {
3969 /* Request the event receiver from the local MC. */
3970 msg
.netfn
= IPMI_NETFN_SENSOR_EVENT_REQUEST
;
3971 msg
.cmd
= IPMI_GET_EVENT_RECEIVER_CMD
;
3974 intf
->null_user_handler
= event_receiver_fetcher
;
3975 i_ipmi_request(NULL
,
3984 intf
->channels
[0].address
,
3985 intf
->channels
[0].lun
,
3986 0, 1); /* no retry, and no wait. */
3988 intf
->null_user_handler
= NULL
;
3990 /* Validate the event receiver. The low bit must not
3991 be 1 (it must be a valid IPMB address), it cannot
3992 be zero, and it must not be my address. */
3993 if (((intf
->event_receiver
& 1) == 0)
3994 && (intf
->event_receiver
!= 0)
3995 && (intf
->event_receiver
!= intf
->channels
[0].address
))
3997 /* The event receiver is valid, send an IPMB
3999 ipmb
= (struct ipmi_ipmb_addr
*) &addr
;
4000 ipmb
->addr_type
= IPMI_IPMB_ADDR_TYPE
;
4001 ipmb
->channel
= 0; /* FIXME - is this right? */
4002 ipmb
->lun
= intf
->event_receiver_lun
;
4003 ipmb
->slave_addr
= intf
->event_receiver
;
4004 } else if (intf
->local_sel_device
) {
4005 /* The event receiver was not valid (or was
4006 me), but I am an SEL device, just dump it
4008 si
= (struct ipmi_system_interface_addr
*) &addr
;
4009 si
->addr_type
= IPMI_SYSTEM_INTERFACE_ADDR_TYPE
;
4010 si
->channel
= IPMI_BMC_CHANNEL
;
4013 continue; /* No where to send the event. */
4016 msg
.netfn
= IPMI_NETFN_STORAGE_REQUEST
; /* Storage. */
4017 msg
.cmd
= IPMI_ADD_SEL_ENTRY_CMD
;
4023 int size
= strlen(p
);
4029 data
[2] = 0xf0; /* OEM event without timestamp. */
4030 data
[3] = intf
->channels
[0].address
;
4031 data
[4] = j
++; /* sequence # */
4032 /* Always give 11 bytes, so strncpy will fill
4033 it with zeroes for me. */
4034 strncpy(data
+5, p
, 11);
4037 i_ipmi_request(NULL
,
4046 intf
->channels
[0].address
,
4047 intf
->channels
[0].lun
,
4048 0, 1); /* no retry, and no wait. */
4051 #endif /* CONFIG_IPMI_PANIC_STRING */
4053 #endif /* CONFIG_IPMI_PANIC_EVENT */
4055 static int has_panicked
;
4057 static int panic_event(struct notifier_block
*this,
4058 unsigned long event
,
4067 /* For every registered interface, set it to run to completion. */
4068 list_for_each_entry_rcu(intf
, &ipmi_interfaces
, link
) {
4069 if (!intf
->handlers
)
4070 /* Interface is not ready. */
4073 intf
->handlers
->set_run_to_completion(intf
->send_info
, 1);
4076 #ifdef CONFIG_IPMI_PANIC_EVENT
4077 send_panic_events(ptr
);
4083 static struct notifier_block panic_block
= {
4084 .notifier_call
= panic_event
,
4086 .priority
= 200 /* priority: INT_MAX >= x >= 0 */
4089 static int ipmi_init_msghandler(void)
4096 rv
= driver_register(&ipmidriver
);
4098 printk(KERN_ERR PFX
"Could not register IPMI driver\n");
4102 printk(KERN_INFO
"ipmi message handler version "
4103 IPMI_DRIVER_VERSION
"\n");
4105 #ifdef CONFIG_PROC_FS
4106 proc_ipmi_root
= proc_mkdir("ipmi", NULL
);
4107 if (!proc_ipmi_root
) {
4108 printk(KERN_ERR PFX
"Unable to create IPMI proc dir");
4112 proc_ipmi_root
->owner
= THIS_MODULE
;
4113 #endif /* CONFIG_PROC_FS */
4115 setup_timer(&ipmi_timer
, ipmi_timeout
, 0);
4116 mod_timer(&ipmi_timer
, jiffies
+ IPMI_TIMEOUT_JIFFIES
);
4118 atomic_notifier_chain_register(&panic_notifier_list
, &panic_block
);
4125 static __init
int ipmi_init_msghandler_mod(void)
4127 ipmi_init_msghandler();
4131 static __exit
void cleanup_ipmi(void)
4138 atomic_notifier_chain_unregister(&panic_notifier_list
, &panic_block
);
4140 /* This can't be called if any interfaces exist, so no worry about
4141 shutting down the interfaces. */
4143 /* Tell the timer to stop, then wait for it to stop. This avoids
4144 problems with race conditions removing the timer here. */
4145 atomic_inc(&stop_operation
);
4146 del_timer_sync(&ipmi_timer
);
4148 #ifdef CONFIG_PROC_FS
4149 remove_proc_entry(proc_ipmi_root
->name
, &proc_root
);
4150 #endif /* CONFIG_PROC_FS */
4152 driver_unregister(&ipmidriver
);
4156 /* Check for buffer leaks. */
4157 count
= atomic_read(&smi_msg_inuse_count
);
4159 printk(KERN_WARNING PFX
"SMI message count %d at exit\n",
4161 count
= atomic_read(&recv_msg_inuse_count
);
4163 printk(KERN_WARNING PFX
"recv message count %d at exit\n",
4166 module_exit(cleanup_ipmi
);
4168 module_init(ipmi_init_msghandler_mod
);
4169 MODULE_LICENSE("GPL");
4170 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
4171 MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI interface.");
4172 MODULE_VERSION(IPMI_DRIVER_VERSION
);
4174 EXPORT_SYMBOL(ipmi_create_user
);
4175 EXPORT_SYMBOL(ipmi_destroy_user
);
4176 EXPORT_SYMBOL(ipmi_get_version
);
4177 EXPORT_SYMBOL(ipmi_request_settime
);
4178 EXPORT_SYMBOL(ipmi_request_supply_msgs
);
4179 EXPORT_SYMBOL(ipmi_register_smi
);
4180 EXPORT_SYMBOL(ipmi_unregister_smi
);
4181 EXPORT_SYMBOL(ipmi_register_for_cmd
);
4182 EXPORT_SYMBOL(ipmi_unregister_for_cmd
);
4183 EXPORT_SYMBOL(ipmi_smi_msg_received
);
4184 EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout
);
4185 EXPORT_SYMBOL(ipmi_alloc_smi_msg
);
4186 EXPORT_SYMBOL(ipmi_addr_length
);
4187 EXPORT_SYMBOL(ipmi_validate_addr
);
4188 EXPORT_SYMBOL(ipmi_set_gets_events
);
4189 EXPORT_SYMBOL(ipmi_smi_watcher_register
);
4190 EXPORT_SYMBOL(ipmi_smi_watcher_unregister
);
4191 EXPORT_SYMBOL(ipmi_set_my_address
);
4192 EXPORT_SYMBOL(ipmi_get_my_address
);
4193 EXPORT_SYMBOL(ipmi_set_my_LUN
);
4194 EXPORT_SYMBOL(ipmi_get_my_LUN
);
4195 EXPORT_SYMBOL(ipmi_smi_add_proc_entry
);
4196 EXPORT_SYMBOL(ipmi_user_set_run_to_completion
);
4197 EXPORT_SYMBOL(ipmi_free_recv_msg
);