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 "39.2"
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
67 * Don't let a message sit in a queue forever, always time it with at lest
68 * the max message timer. This is in milliseconds.
70 #define MAX_MSG_TIMEOUT 60000
73 * 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? */
95 struct list_head link;
103 * This is used to form a linked lised during mass deletion.
104 * Since this is in an RCU list, we cannot use the link above
105 * or change any data until the RCU period completes. So we
106 * use this next variable during mass deletion so we can have
107 * a list and don't have to wait and restart the search on
108 * every individual deletion of a command.
110 struct cmd_rcvr *next;
114 unsigned int inuse : 1;
115 unsigned int broadcast : 1;
117 unsigned long timeout;
118 unsigned long orig_timeout;
119 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.
129 * This is held so we can properly respond to the message on a
130 * timeout, and it is used to hold the temporary data for
131 * retransmission, too.
133 struct ipmi_recv_msg *recv_msg;
137 * Store the information in a msgid (long) to allow us to find a
138 * sequence table entry from the msgid.
140 #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
142 #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
144 seq = ((msgid >> 26) & 0x3f); \
145 seqid = (msgid & 0x3fffff); \
148 #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
150 struct ipmi_channel {
151 unsigned char medium;
152 unsigned char protocol;
155 * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
156 * but may be changed by the user.
158 unsigned char address;
161 * My LUN. This should generally stay the SMS LUN, but just in
167 #ifdef CONFIG_PROC_FS
168 struct ipmi_proc_entry {
170 struct ipmi_proc_entry *next;
175 struct platform_device *dev;
176 struct ipmi_device_id id;
177 unsigned char guid[16];
180 struct kref refcount;
182 /* bmc device attributes */
183 struct device_attribute device_id_attr;
184 struct device_attribute provides_dev_sdrs_attr;
185 struct device_attribute revision_attr;
186 struct device_attribute firmware_rev_attr;
187 struct device_attribute version_attr;
188 struct device_attribute add_dev_support_attr;
189 struct device_attribute manufacturer_id_attr;
190 struct device_attribute product_id_attr;
191 struct device_attribute guid_attr;
192 struct device_attribute aux_firmware_rev_attr;
196 * Various statistics for IPMI, these index stats[] in the ipmi_smi
199 enum ipmi_stat_indexes {
200 /* Commands we got from the user that were invalid. */
201 IPMI_STAT_sent_invalid_commands = 0,
203 /* Commands we sent to the MC. */
204 IPMI_STAT_sent_local_commands,
206 /* Responses from the MC that were delivered to a user. */
207 IPMI_STAT_handled_local_responses,
209 /* Responses from the MC that were not delivered to a user. */
210 IPMI_STAT_unhandled_local_responses,
212 /* Commands we sent out to the IPMB bus. */
213 IPMI_STAT_sent_ipmb_commands,
215 /* Commands sent on the IPMB that had errors on the SEND CMD */
216 IPMI_STAT_sent_ipmb_command_errs,
218 /* Each retransmit increments this count. */
219 IPMI_STAT_retransmitted_ipmb_commands,
222 * When a message times out (runs out of retransmits) this is
225 IPMI_STAT_timed_out_ipmb_commands,
228 * This is like above, but for broadcasts. Broadcasts are
229 * *not* included in the above count (they are expected to
232 IPMI_STAT_timed_out_ipmb_broadcasts,
234 /* Responses I have sent to the IPMB bus. */
235 IPMI_STAT_sent_ipmb_responses,
237 /* The response was delivered to the user. */
238 IPMI_STAT_handled_ipmb_responses,
240 /* The response had invalid data in it. */
241 IPMI_STAT_invalid_ipmb_responses,
243 /* The response didn't have anyone waiting for it. */
244 IPMI_STAT_unhandled_ipmb_responses,
246 /* Commands we sent out to the IPMB bus. */
247 IPMI_STAT_sent_lan_commands,
249 /* Commands sent on the IPMB that had errors on the SEND CMD */
250 IPMI_STAT_sent_lan_command_errs,
252 /* Each retransmit increments this count. */
253 IPMI_STAT_retransmitted_lan_commands,
256 * When a message times out (runs out of retransmits) this is
259 IPMI_STAT_timed_out_lan_commands,
261 /* Responses I have sent to the IPMB bus. */
262 IPMI_STAT_sent_lan_responses,
264 /* The response was delivered to the user. */
265 IPMI_STAT_handled_lan_responses,
267 /* The response had invalid data in it. */
268 IPMI_STAT_invalid_lan_responses,
270 /* The response didn't have anyone waiting for it. */
271 IPMI_STAT_unhandled_lan_responses,
273 /* The command was delivered to the user. */
274 IPMI_STAT_handled_commands,
276 /* The command had invalid data in it. */
277 IPMI_STAT_invalid_commands,
279 /* The command didn't have anyone waiting for it. */
280 IPMI_STAT_unhandled_commands,
282 /* Invalid data in an event. */
283 IPMI_STAT_invalid_events,
285 /* Events that were received with the proper format. */
289 /* This *must* remain last, add new values above this. */
294 #define IPMI_IPMB_NUM_SEQ 64
295 #define IPMI_MAX_CHANNELS 16
297 /* What interface number are we? */
300 struct kref refcount;
302 /* Used for a list of interfaces. */
303 struct list_head link;
306 * The list of upper layers that are using me. seq_lock
309 struct list_head users;
311 /* Information to supply to users. */
312 unsigned char ipmi_version_major;
313 unsigned char ipmi_version_minor;
315 /* Used for wake ups at startup. */
316 wait_queue_head_t waitq;
318 struct bmc_device *bmc;
323 * This is the lower-layer's sender routine. Note that you
324 * must either be holding the ipmi_interfaces_mutex or be in
325 * an umpreemptible region to use this. You must fetch the
326 * value into a local variable and make sure it is not NULL.
328 struct ipmi_smi_handlers *handlers;
331 #ifdef CONFIG_PROC_FS
332 /* A list of proc entries for this interface. */
333 struct mutex proc_entry_lock;
334 struct ipmi_proc_entry *proc_entries;
337 /* Driver-model device for the system interface. */
338 struct device *si_dev;
341 * A table of sequence numbers for this interface. We use the
342 * sequence numbers for IPMB messages that go out of the
343 * interface to match them up with their responses. A routine
344 * is called periodically to time the items in this list.
347 struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
351 * Messages that were delayed for some reason (out of memory,
352 * for instance), will go in here to be processed later in a
353 * periodic timer interrupt.
355 spinlock_t waiting_msgs_lock;
356 struct list_head waiting_msgs;
359 * The list of command receivers that are registered for commands
362 struct mutex cmd_rcvrs_mutex;
363 struct list_head cmd_rcvrs;
366 * Events that were queues because no one was there to receive
369 spinlock_t events_lock; /* For dealing with event stuff. */
370 struct list_head waiting_events;
371 unsigned int waiting_events_count; /* How many events in queue? */
372 char delivering_events;
373 char event_msg_printed;
376 * The event receiver for my BMC, only really used at panic
377 * shutdown as a place to store this.
379 unsigned char event_receiver;
380 unsigned char event_receiver_lun;
381 unsigned char local_sel_device;
382 unsigned char local_event_generator;
384 /* For handling of maintenance mode. */
385 int maintenance_mode;
386 int maintenance_mode_enable;
387 int auto_maintenance_timeout;
388 spinlock_t maintenance_mode_lock; /* Used in a timer... */
391 * A cheap hack, if this is non-null and a message to an
392 * interface comes in with a NULL user, call this routine with
393 * it. Note that the message will still be freed by the
394 * caller. This only works on the system interface.
396 void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
399 * When we are scanning the channels for an SMI, this will
400 * tell which channel we are scanning.
404 /* Channel information */
405 struct ipmi_channel channels[IPMI_MAX_CHANNELS];
408 struct proc_dir_entry *proc_dir;
409 char proc_dir_name[10];
411 atomic_t stats[IPMI_NUM_STATS];
414 * run_to_completion duplicate of smb_info, smi_info
415 * and ipmi_serial_info structures. Used to decrease numbers of
416 * parameters passed by "low" level IPMI code.
418 int run_to_completion;
420 #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
423 * The driver model view of the IPMI messaging driver.
425 static struct device_driver ipmidriver = {
427 .bus = &platform_bus_type
429 static DEFINE_MUTEX(ipmidriver_mutex);
431 static LIST_HEAD(ipmi_interfaces);
432 static DEFINE_MUTEX(ipmi_interfaces_mutex);
435 * List of watchers that want to know when smi's are added and deleted.
437 static LIST_HEAD(smi_watchers);
438 static DEFINE_MUTEX(smi_watchers_mutex);
441 #define ipmi_inc_stat(intf, stat) \
442 atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
443 #define ipmi_get_stat(intf, stat) \
444 ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
447 static void free_recv_msg_list(struct list_head *q)
449 struct ipmi_recv_msg *msg, *msg2;
451 list_for_each_entry_safe(msg, msg2, q, link) {
452 list_del(&msg->link);
453 ipmi_free_recv_msg(msg);
457 static void free_smi_msg_list(struct list_head *q)
459 struct ipmi_smi_msg *msg, *msg2;
461 list_for_each_entry_safe(msg, msg2, q, link) {
462 list_del(&msg->link);
463 ipmi_free_smi_msg(msg);
467 static void clean_up_interface_data(ipmi_smi_t intf)
470 struct cmd_rcvr *rcvr, *rcvr2;
471 struct list_head list;
473 free_smi_msg_list(&intf->waiting_msgs);
474 free_recv_msg_list(&intf->waiting_events);
477 * Wholesale remove all the entries from the list in the
478 * interface and wait for RCU to know that none are in use.
480 mutex_lock(&intf->cmd_rcvrs_mutex);
481 INIT_LIST_HEAD(&list);
482 list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
483 mutex_unlock(&intf->cmd_rcvrs_mutex);
485 list_for_each_entry_safe(rcvr, rcvr2, &list, link)
488 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
489 if ((intf->seq_table[i].inuse)
490 && (intf->seq_table[i].recv_msg))
491 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
495 static void intf_free(struct kref *ref)
497 ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
499 clean_up_interface_data(intf);
503 struct watcher_entry {
506 struct list_head link;
509 int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
512 LIST_HEAD(to_deliver);
513 struct watcher_entry *e, *e2;
515 mutex_lock(&smi_watchers_mutex);
517 mutex_lock(&ipmi_interfaces_mutex);
519 /* Build a list of things to deliver. */
520 list_for_each_entry(intf, &ipmi_interfaces, link) {
521 if (intf->intf_num == -1)
523 e = kmalloc(sizeof(*e), GFP_KERNEL);
526 kref_get(&intf->refcount);
528 e->intf_num = intf->intf_num;
529 list_add_tail(&e->link, &to_deliver);
532 /* We will succeed, so add it to the list. */
533 list_add(&watcher->link, &smi_watchers);
535 mutex_unlock(&ipmi_interfaces_mutex);
537 list_for_each_entry_safe(e, e2, &to_deliver, link) {
539 watcher->new_smi(e->intf_num, e->intf->si_dev);
540 kref_put(&e->intf->refcount, intf_free);
544 mutex_unlock(&smi_watchers_mutex);
549 mutex_unlock(&ipmi_interfaces_mutex);
550 mutex_unlock(&smi_watchers_mutex);
551 list_for_each_entry_safe(e, e2, &to_deliver, link) {
553 kref_put(&e->intf->refcount, intf_free);
558 EXPORT_SYMBOL(ipmi_smi_watcher_register);
560 int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
562 mutex_lock(&smi_watchers_mutex);
563 list_del(&(watcher->link));
564 mutex_unlock(&smi_watchers_mutex);
567 EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
570 * Must be called with smi_watchers_mutex held.
573 call_smi_watchers(int i, struct device *dev)
575 struct ipmi_smi_watcher *w;
577 list_for_each_entry(w, &smi_watchers, link) {
578 if (try_module_get(w->owner)) {
580 module_put(w->owner);
586 ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
588 if (addr1->addr_type != addr2->addr_type)
591 if (addr1->channel != addr2->channel)
594 if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
595 struct ipmi_system_interface_addr *smi_addr1
596 = (struct ipmi_system_interface_addr *) addr1;
597 struct ipmi_system_interface_addr *smi_addr2
598 = (struct ipmi_system_interface_addr *) addr2;
599 return (smi_addr1->lun == smi_addr2->lun);
602 if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE)
603 || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
604 struct ipmi_ipmb_addr *ipmb_addr1
605 = (struct ipmi_ipmb_addr *) addr1;
606 struct ipmi_ipmb_addr *ipmb_addr2
607 = (struct ipmi_ipmb_addr *) addr2;
609 return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
610 && (ipmb_addr1->lun == ipmb_addr2->lun));
613 if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) {
614 struct ipmi_lan_addr *lan_addr1
615 = (struct ipmi_lan_addr *) addr1;
616 struct ipmi_lan_addr *lan_addr2
617 = (struct ipmi_lan_addr *) addr2;
619 return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
620 && (lan_addr1->local_SWID == lan_addr2->local_SWID)
621 && (lan_addr1->session_handle
622 == lan_addr2->session_handle)
623 && (lan_addr1->lun == lan_addr2->lun));
629 int ipmi_validate_addr(struct ipmi_addr *addr, int len)
631 if (len < sizeof(struct ipmi_system_interface_addr))
634 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
635 if (addr->channel != IPMI_BMC_CHANNEL)
640 if ((addr->channel == IPMI_BMC_CHANNEL)
641 || (addr->channel >= IPMI_MAX_CHANNELS)
642 || (addr->channel < 0))
645 if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
646 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
647 if (len < sizeof(struct ipmi_ipmb_addr))
652 if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
653 if (len < sizeof(struct ipmi_lan_addr))
660 EXPORT_SYMBOL(ipmi_validate_addr);
662 unsigned int ipmi_addr_length(int addr_type)
664 if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
665 return sizeof(struct ipmi_system_interface_addr);
667 if ((addr_type == IPMI_IPMB_ADDR_TYPE)
668 || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
669 return sizeof(struct ipmi_ipmb_addr);
671 if (addr_type == IPMI_LAN_ADDR_TYPE)
672 return sizeof(struct ipmi_lan_addr);
676 EXPORT_SYMBOL(ipmi_addr_length);
678 static void deliver_response(struct ipmi_recv_msg *msg)
681 ipmi_smi_t intf = msg->user_msg_data;
683 /* Special handling for NULL users. */
684 if (intf->null_user_handler) {
685 intf->null_user_handler(intf, msg);
686 ipmi_inc_stat(intf, handled_local_responses);
688 /* No handler, so give up. */
689 ipmi_inc_stat(intf, unhandled_local_responses);
691 ipmi_free_recv_msg(msg);
693 ipmi_user_t user = msg->user;
694 user->handler->ipmi_recv_hndl(msg, user->handler_data);
699 deliver_err_response(struct ipmi_recv_msg *msg, int err)
701 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
702 msg->msg_data[0] = err;
703 msg->msg.netfn |= 1; /* Convert to a response. */
704 msg->msg.data_len = 1;
705 msg->msg.data = msg->msg_data;
706 deliver_response(msg);
710 * Find the next sequence number not being used and add the given
711 * message with the given timeout to the sequence table. This must be
712 * called with the interface's seq_lock held.
714 static int intf_next_seq(ipmi_smi_t intf,
715 struct ipmi_recv_msg *recv_msg,
716 unsigned long timeout,
725 for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
726 i = (i+1)%IPMI_IPMB_NUM_SEQ) {
727 if (!intf->seq_table[i].inuse)
731 if (!intf->seq_table[i].inuse) {
732 intf->seq_table[i].recv_msg = recv_msg;
735 * Start with the maximum timeout, when the send response
736 * comes in we will start the real timer.
738 intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
739 intf->seq_table[i].orig_timeout = timeout;
740 intf->seq_table[i].retries_left = retries;
741 intf->seq_table[i].broadcast = broadcast;
742 intf->seq_table[i].inuse = 1;
743 intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
745 *seqid = intf->seq_table[i].seqid;
746 intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
755 * Return the receive message for the given sequence number and
756 * release the sequence number so it can be reused. Some other data
757 * is passed in to be sure the message matches up correctly (to help
758 * guard against message coming in after their timeout and the
759 * sequence number being reused).
761 static int intf_find_seq(ipmi_smi_t intf,
766 struct ipmi_addr *addr,
767 struct ipmi_recv_msg **recv_msg)
772 if (seq >= IPMI_IPMB_NUM_SEQ)
775 spin_lock_irqsave(&(intf->seq_lock), flags);
776 if (intf->seq_table[seq].inuse) {
777 struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
779 if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
780 && (msg->msg.netfn == netfn)
781 && (ipmi_addr_equal(addr, &(msg->addr)))) {
783 intf->seq_table[seq].inuse = 0;
787 spin_unlock_irqrestore(&(intf->seq_lock), flags);
793 /* Start the timer for a specific sequence table entry. */
794 static int intf_start_seq_timer(ipmi_smi_t intf,
803 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
805 spin_lock_irqsave(&(intf->seq_lock), flags);
807 * We do this verification because the user can be deleted
808 * while a message is outstanding.
810 if ((intf->seq_table[seq].inuse)
811 && (intf->seq_table[seq].seqid == seqid)) {
812 struct seq_table *ent = &(intf->seq_table[seq]);
813 ent->timeout = ent->orig_timeout;
816 spin_unlock_irqrestore(&(intf->seq_lock), flags);
821 /* Got an error for the send message for a specific sequence number. */
822 static int intf_err_seq(ipmi_smi_t intf,
830 struct ipmi_recv_msg *msg = NULL;
833 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
835 spin_lock_irqsave(&(intf->seq_lock), flags);
837 * We do this verification because the user can be deleted
838 * while a message is outstanding.
840 if ((intf->seq_table[seq].inuse)
841 && (intf->seq_table[seq].seqid == seqid)) {
842 struct seq_table *ent = &(intf->seq_table[seq]);
848 spin_unlock_irqrestore(&(intf->seq_lock), flags);
851 deliver_err_response(msg, err);
857 int ipmi_create_user(unsigned int if_num,
858 struct ipmi_user_hndl *handler,
863 ipmi_user_t new_user;
868 * There is no module usecount here, because it's not
869 * required. Since this can only be used by and called from
870 * other modules, they will implicitly use this module, and
871 * thus this can't be removed unless the other modules are
879 * Make sure the driver is actually initialized, this handles
880 * problems with initialization order.
883 rv = ipmi_init_msghandler();
888 * The init code doesn't return an error if it was turned
889 * off, but it won't initialize. Check that.
895 new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
899 mutex_lock(&ipmi_interfaces_mutex);
900 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
901 if (intf->intf_num == if_num)
904 /* Not found, return an error */
909 /* Note that each existing user holds a refcount to the interface. */
910 kref_get(&intf->refcount);
912 kref_init(&new_user->refcount);
913 new_user->handler = handler;
914 new_user->handler_data = handler_data;
915 new_user->intf = intf;
916 new_user->gets_events = 0;
918 if (!try_module_get(intf->handlers->owner)) {
923 if (intf->handlers->inc_usecount) {
924 rv = intf->handlers->inc_usecount(intf->send_info);
926 module_put(intf->handlers->owner);
932 * Hold the lock so intf->handlers is guaranteed to be good
935 mutex_unlock(&ipmi_interfaces_mutex);
938 spin_lock_irqsave(&intf->seq_lock, flags);
939 list_add_rcu(&new_user->link, &intf->users);
940 spin_unlock_irqrestore(&intf->seq_lock, flags);
945 kref_put(&intf->refcount, intf_free);
947 mutex_unlock(&ipmi_interfaces_mutex);
951 EXPORT_SYMBOL(ipmi_create_user);
953 static void free_user(struct kref *ref)
955 ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
959 int ipmi_destroy_user(ipmi_user_t user)
961 ipmi_smi_t intf = user->intf;
964 struct cmd_rcvr *rcvr;
965 struct cmd_rcvr *rcvrs = NULL;
969 /* Remove the user from the interface's sequence table. */
970 spin_lock_irqsave(&intf->seq_lock, flags);
971 list_del_rcu(&user->link);
973 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
974 if (intf->seq_table[i].inuse
975 && (intf->seq_table[i].recv_msg->user == user)) {
976 intf->seq_table[i].inuse = 0;
977 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
980 spin_unlock_irqrestore(&intf->seq_lock, flags);
983 * Remove the user from the command receiver's table. First
984 * we build a list of everything (not using the standard link,
985 * since other things may be using it till we do
986 * synchronize_rcu()) then free everything in that list.
988 mutex_lock(&intf->cmd_rcvrs_mutex);
989 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
990 if (rcvr->user == user) {
991 list_del_rcu(&rcvr->link);
996 mutex_unlock(&intf->cmd_rcvrs_mutex);
1004 mutex_lock(&ipmi_interfaces_mutex);
1005 if (intf->handlers) {
1006 module_put(intf->handlers->owner);
1007 if (intf->handlers->dec_usecount)
1008 intf->handlers->dec_usecount(intf->send_info);
1010 mutex_unlock(&ipmi_interfaces_mutex);
1012 kref_put(&intf->refcount, intf_free);
1014 kref_put(&user->refcount, free_user);
1018 EXPORT_SYMBOL(ipmi_destroy_user);
1020 void ipmi_get_version(ipmi_user_t user,
1021 unsigned char *major,
1022 unsigned char *minor)
1024 *major = user->intf->ipmi_version_major;
1025 *minor = user->intf->ipmi_version_minor;
1027 EXPORT_SYMBOL(ipmi_get_version);
1029 int ipmi_set_my_address(ipmi_user_t user,
1030 unsigned int channel,
1031 unsigned char address)
1033 if (channel >= IPMI_MAX_CHANNELS)
1035 user->intf->channels[channel].address = address;
1038 EXPORT_SYMBOL(ipmi_set_my_address);
1040 int ipmi_get_my_address(ipmi_user_t user,
1041 unsigned int channel,
1042 unsigned char *address)
1044 if (channel >= IPMI_MAX_CHANNELS)
1046 *address = user->intf->channels[channel].address;
1049 EXPORT_SYMBOL(ipmi_get_my_address);
1051 int ipmi_set_my_LUN(ipmi_user_t user,
1052 unsigned int channel,
1055 if (channel >= IPMI_MAX_CHANNELS)
1057 user->intf->channels[channel].lun = LUN & 0x3;
1060 EXPORT_SYMBOL(ipmi_set_my_LUN);
1062 int ipmi_get_my_LUN(ipmi_user_t user,
1063 unsigned int channel,
1064 unsigned char *address)
1066 if (channel >= IPMI_MAX_CHANNELS)
1068 *address = user->intf->channels[channel].lun;
1071 EXPORT_SYMBOL(ipmi_get_my_LUN);
1073 int ipmi_get_maintenance_mode(ipmi_user_t user)
1076 unsigned long flags;
1078 spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
1079 mode = user->intf->maintenance_mode;
1080 spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
1084 EXPORT_SYMBOL(ipmi_get_maintenance_mode);
1086 static void maintenance_mode_update(ipmi_smi_t intf)
1088 if (intf->handlers->set_maintenance_mode)
1089 intf->handlers->set_maintenance_mode(
1090 intf->send_info, intf->maintenance_mode_enable);
1093 int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
1096 unsigned long flags;
1097 ipmi_smi_t intf = user->intf;
1099 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1100 if (intf->maintenance_mode != mode) {
1102 case IPMI_MAINTENANCE_MODE_AUTO:
1103 intf->maintenance_mode = mode;
1104 intf->maintenance_mode_enable
1105 = (intf->auto_maintenance_timeout > 0);
1108 case IPMI_MAINTENANCE_MODE_OFF:
1109 intf->maintenance_mode = mode;
1110 intf->maintenance_mode_enable = 0;
1113 case IPMI_MAINTENANCE_MODE_ON:
1114 intf->maintenance_mode = mode;
1115 intf->maintenance_mode_enable = 1;
1123 maintenance_mode_update(intf);
1126 spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
1130 EXPORT_SYMBOL(ipmi_set_maintenance_mode);
1132 int ipmi_set_gets_events(ipmi_user_t user, int val)
1134 unsigned long flags;
1135 ipmi_smi_t intf = user->intf;
1136 struct ipmi_recv_msg *msg, *msg2;
1137 struct list_head msgs;
1139 INIT_LIST_HEAD(&msgs);
1141 spin_lock_irqsave(&intf->events_lock, flags);
1142 user->gets_events = val;
1144 if (intf->delivering_events)
1146 * Another thread is delivering events for this, so
1147 * let it handle any new events.
1151 /* Deliver any queued events. */
1152 while (user->gets_events && !list_empty(&intf->waiting_events)) {
1153 list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
1154 list_move_tail(&msg->link, &msgs);
1155 intf->waiting_events_count = 0;
1156 if (intf->event_msg_printed) {
1157 printk(KERN_WARNING PFX "Event queue no longer"
1159 intf->event_msg_printed = 0;
1162 intf->delivering_events = 1;
1163 spin_unlock_irqrestore(&intf->events_lock, flags);
1165 list_for_each_entry_safe(msg, msg2, &msgs, link) {
1167 kref_get(&user->refcount);
1168 deliver_response(msg);
1171 spin_lock_irqsave(&intf->events_lock, flags);
1172 intf->delivering_events = 0;
1176 spin_unlock_irqrestore(&intf->events_lock, flags);
1180 EXPORT_SYMBOL(ipmi_set_gets_events);
1182 static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
1183 unsigned char netfn,
1187 struct cmd_rcvr *rcvr;
1189 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1190 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1191 && (rcvr->chans & (1 << chan)))
1197 static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
1198 unsigned char netfn,
1202 struct cmd_rcvr *rcvr;
1204 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1205 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1206 && (rcvr->chans & chans))
1212 int ipmi_register_for_cmd(ipmi_user_t user,
1213 unsigned char netfn,
1217 ipmi_smi_t intf = user->intf;
1218 struct cmd_rcvr *rcvr;
1222 rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
1226 rcvr->netfn = netfn;
1227 rcvr->chans = chans;
1230 mutex_lock(&intf->cmd_rcvrs_mutex);
1231 /* Make sure the command/netfn is not already registered. */
1232 if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
1237 list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1240 mutex_unlock(&intf->cmd_rcvrs_mutex);
1246 EXPORT_SYMBOL(ipmi_register_for_cmd);
1248 int ipmi_unregister_for_cmd(ipmi_user_t user,
1249 unsigned char netfn,
1253 ipmi_smi_t intf = user->intf;
1254 struct cmd_rcvr *rcvr;
1255 struct cmd_rcvr *rcvrs = NULL;
1256 int i, rv = -ENOENT;
1258 mutex_lock(&intf->cmd_rcvrs_mutex);
1259 for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
1260 if (((1 << i) & chans) == 0)
1262 rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
1265 if (rcvr->user == user) {
1267 rcvr->chans &= ~chans;
1268 if (rcvr->chans == 0) {
1269 list_del_rcu(&rcvr->link);
1275 mutex_unlock(&intf->cmd_rcvrs_mutex);
1284 EXPORT_SYMBOL(ipmi_unregister_for_cmd);
1286 static unsigned char
1287 ipmb_checksum(unsigned char *data, int size)
1289 unsigned char csum = 0;
1291 for (; size > 0; size--, data++)
1297 static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1298 struct kernel_ipmi_msg *msg,
1299 struct ipmi_ipmb_addr *ipmb_addr,
1301 unsigned char ipmb_seq,
1303 unsigned char source_address,
1304 unsigned char source_lun)
1308 /* Format the IPMB header data. */
1309 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1310 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1311 smi_msg->data[2] = ipmb_addr->channel;
1313 smi_msg->data[3] = 0;
1314 smi_msg->data[i+3] = ipmb_addr->slave_addr;
1315 smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1316 smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1317 smi_msg->data[i+6] = source_address;
1318 smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1319 smi_msg->data[i+8] = msg->cmd;
1321 /* Now tack on the data to the message. */
1322 if (msg->data_len > 0)
1323 memcpy(&(smi_msg->data[i+9]), msg->data,
1325 smi_msg->data_size = msg->data_len + 9;
1327 /* Now calculate the checksum and tack it on. */
1328 smi_msg->data[i+smi_msg->data_size]
1329 = ipmb_checksum(&(smi_msg->data[i+6]),
1330 smi_msg->data_size-6);
1333 * Add on the checksum size and the offset from the
1336 smi_msg->data_size += 1 + i;
1338 smi_msg->msgid = msgid;
1341 static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1342 struct kernel_ipmi_msg *msg,
1343 struct ipmi_lan_addr *lan_addr,
1345 unsigned char ipmb_seq,
1346 unsigned char source_lun)
1348 /* Format the IPMB header data. */
1349 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1350 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1351 smi_msg->data[2] = lan_addr->channel;
1352 smi_msg->data[3] = lan_addr->session_handle;
1353 smi_msg->data[4] = lan_addr->remote_SWID;
1354 smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1355 smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1356 smi_msg->data[7] = lan_addr->local_SWID;
1357 smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1358 smi_msg->data[9] = msg->cmd;
1360 /* Now tack on the data to the message. */
1361 if (msg->data_len > 0)
1362 memcpy(&(smi_msg->data[10]), msg->data,
1364 smi_msg->data_size = msg->data_len + 10;
1366 /* Now calculate the checksum and tack it on. */
1367 smi_msg->data[smi_msg->data_size]
1368 = ipmb_checksum(&(smi_msg->data[7]),
1369 smi_msg->data_size-7);
1372 * Add on the checksum size and the offset from the
1375 smi_msg->data_size += 1;
1377 smi_msg->msgid = msgid;
1381 * Separate from ipmi_request so that the user does not have to be
1382 * supplied in certain circumstances (mainly at panic time). If
1383 * messages are supplied, they will be freed, even if an error
1386 static int i_ipmi_request(ipmi_user_t user,
1388 struct ipmi_addr *addr,
1390 struct kernel_ipmi_msg *msg,
1391 void *user_msg_data,
1393 struct ipmi_recv_msg *supplied_recv,
1395 unsigned char source_address,
1396 unsigned char source_lun,
1398 unsigned int retry_time_ms)
1401 struct ipmi_smi_msg *smi_msg;
1402 struct ipmi_recv_msg *recv_msg;
1403 unsigned long flags;
1404 struct ipmi_smi_handlers *handlers;
1408 recv_msg = supplied_recv;
1410 recv_msg = ipmi_alloc_recv_msg();
1411 if (recv_msg == NULL)
1414 recv_msg->user_msg_data = user_msg_data;
1417 smi_msg = (struct ipmi_smi_msg *) supplied_smi;
1419 smi_msg = ipmi_alloc_smi_msg();
1420 if (smi_msg == NULL) {
1421 ipmi_free_recv_msg(recv_msg);
1427 handlers = intf->handlers;
1433 recv_msg->user = user;
1435 kref_get(&user->refcount);
1436 recv_msg->msgid = msgid;
1438 * Store the message to send in the receive message so timeout
1439 * responses can get the proper response data.
1441 recv_msg->msg = *msg;
1443 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1444 struct ipmi_system_interface_addr *smi_addr;
1446 if (msg->netfn & 1) {
1447 /* Responses are not allowed to the SMI. */
1452 smi_addr = (struct ipmi_system_interface_addr *) addr;
1453 if (smi_addr->lun > 3) {
1454 ipmi_inc_stat(intf, sent_invalid_commands);
1459 memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1461 if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1462 && ((msg->cmd == IPMI_SEND_MSG_CMD)
1463 || (msg->cmd == IPMI_GET_MSG_CMD)
1464 || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
1466 * We don't let the user do these, since we manage
1467 * the sequence numbers.
1469 ipmi_inc_stat(intf, sent_invalid_commands);
1474 if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
1475 && ((msg->cmd == IPMI_COLD_RESET_CMD)
1476 || (msg->cmd == IPMI_WARM_RESET_CMD)))
1477 || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
1478 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1479 intf->auto_maintenance_timeout
1480 = IPMI_MAINTENANCE_MODE_TIMEOUT;
1481 if (!intf->maintenance_mode
1482 && !intf->maintenance_mode_enable) {
1483 intf->maintenance_mode_enable = 1;
1484 maintenance_mode_update(intf);
1486 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
1490 if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
1491 ipmi_inc_stat(intf, sent_invalid_commands);
1496 smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1497 smi_msg->data[1] = msg->cmd;
1498 smi_msg->msgid = msgid;
1499 smi_msg->user_data = recv_msg;
1500 if (msg->data_len > 0)
1501 memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1502 smi_msg->data_size = msg->data_len + 2;
1503 ipmi_inc_stat(intf, sent_local_commands);
1504 } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
1505 || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
1506 struct ipmi_ipmb_addr *ipmb_addr;
1507 unsigned char ipmb_seq;
1511 if (addr->channel >= IPMI_MAX_CHANNELS) {
1512 ipmi_inc_stat(intf, sent_invalid_commands);
1517 if (intf->channels[addr->channel].medium
1518 != IPMI_CHANNEL_MEDIUM_IPMB) {
1519 ipmi_inc_stat(intf, sent_invalid_commands);
1525 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1526 retries = 0; /* Don't retry broadcasts. */
1530 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
1532 * Broadcasts add a zero at the beginning of the
1533 * message, but otherwise is the same as an IPMB
1536 addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1541 /* Default to 1 second retries. */
1542 if (retry_time_ms == 0)
1543 retry_time_ms = 1000;
1546 * 9 for the header and 1 for the checksum, plus
1547 * possibly one for the broadcast.
1549 if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
1550 ipmi_inc_stat(intf, sent_invalid_commands);
1555 ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1556 if (ipmb_addr->lun > 3) {
1557 ipmi_inc_stat(intf, sent_invalid_commands);
1562 memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1564 if (recv_msg->msg.netfn & 0x1) {
1566 * It's a response, so use the user's sequence
1569 ipmi_inc_stat(intf, sent_ipmb_responses);
1570 format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1572 source_address, source_lun);
1575 * Save the receive message so we can use it
1576 * to deliver the response.
1578 smi_msg->user_data = recv_msg;
1580 /* It's a command, so get a sequence for it. */
1582 spin_lock_irqsave(&(intf->seq_lock), flags);
1584 ipmi_inc_stat(intf, sent_ipmb_commands);
1587 * Create a sequence number with a 1 second
1588 * timeout and 4 retries.
1590 rv = intf_next_seq(intf,
1599 * We have used up all the sequence numbers,
1600 * probably, so abort.
1602 spin_unlock_irqrestore(&(intf->seq_lock),
1608 * Store the sequence number in the message,
1609 * so that when the send message response
1610 * comes back we can start the timer.
1612 format_ipmb_msg(smi_msg, msg, ipmb_addr,
1613 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1614 ipmb_seq, broadcast,
1615 source_address, source_lun);
1618 * Copy the message into the recv message data, so we
1619 * can retransmit it later if necessary.
1621 memcpy(recv_msg->msg_data, smi_msg->data,
1622 smi_msg->data_size);
1623 recv_msg->msg.data = recv_msg->msg_data;
1624 recv_msg->msg.data_len = smi_msg->data_size;
1627 * We don't unlock until here, because we need
1628 * to copy the completed message into the
1629 * recv_msg before we release the lock.
1630 * Otherwise, race conditions may bite us. I
1631 * know that's pretty paranoid, but I prefer
1634 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1636 } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
1637 struct ipmi_lan_addr *lan_addr;
1638 unsigned char ipmb_seq;
1641 if (addr->channel >= IPMI_MAX_CHANNELS) {
1642 ipmi_inc_stat(intf, sent_invalid_commands);
1647 if ((intf->channels[addr->channel].medium
1648 != IPMI_CHANNEL_MEDIUM_8023LAN)
1649 && (intf->channels[addr->channel].medium
1650 != IPMI_CHANNEL_MEDIUM_ASYNC)) {
1651 ipmi_inc_stat(intf, sent_invalid_commands);
1658 /* Default to 1 second retries. */
1659 if (retry_time_ms == 0)
1660 retry_time_ms = 1000;
1662 /* 11 for the header and 1 for the checksum. */
1663 if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
1664 ipmi_inc_stat(intf, sent_invalid_commands);
1669 lan_addr = (struct ipmi_lan_addr *) addr;
1670 if (lan_addr->lun > 3) {
1671 ipmi_inc_stat(intf, sent_invalid_commands);
1676 memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1678 if (recv_msg->msg.netfn & 0x1) {
1680 * It's a response, so use the user's sequence
1683 ipmi_inc_stat(intf, sent_lan_responses);
1684 format_lan_msg(smi_msg, msg, lan_addr, msgid,
1688 * Save the receive message so we can use it
1689 * to deliver the response.
1691 smi_msg->user_data = recv_msg;
1693 /* It's a command, so get a sequence for it. */
1695 spin_lock_irqsave(&(intf->seq_lock), flags);
1697 ipmi_inc_stat(intf, sent_lan_commands);
1700 * Create a sequence number with a 1 second
1701 * timeout and 4 retries.
1703 rv = intf_next_seq(intf,
1712 * We have used up all the sequence numbers,
1713 * probably, so abort.
1715 spin_unlock_irqrestore(&(intf->seq_lock),
1721 * Store the sequence number in the message,
1722 * so that when the send message response
1723 * comes back we can start the timer.
1725 format_lan_msg(smi_msg, msg, lan_addr,
1726 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1727 ipmb_seq, source_lun);
1730 * Copy the message into the recv message data, so we
1731 * can retransmit it later if necessary.
1733 memcpy(recv_msg->msg_data, smi_msg->data,
1734 smi_msg->data_size);
1735 recv_msg->msg.data = recv_msg->msg_data;
1736 recv_msg->msg.data_len = smi_msg->data_size;
1739 * We don't unlock until here, because we need
1740 * to copy the completed message into the
1741 * recv_msg before we release the lock.
1742 * Otherwise, race conditions may bite us. I
1743 * know that's pretty paranoid, but I prefer
1746 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1749 /* Unknown address type. */
1750 ipmi_inc_stat(intf, sent_invalid_commands);
1758 for (m = 0; m < smi_msg->data_size; m++)
1759 printk(" %2.2x", smi_msg->data[m]);
1764 handlers->sender(intf->send_info, smi_msg, priority);
1771 ipmi_free_smi_msg(smi_msg);
1772 ipmi_free_recv_msg(recv_msg);
1776 static int check_addr(ipmi_smi_t intf,
1777 struct ipmi_addr *addr,
1778 unsigned char *saddr,
1781 if (addr->channel >= IPMI_MAX_CHANNELS)
1783 *lun = intf->channels[addr->channel].lun;
1784 *saddr = intf->channels[addr->channel].address;
1788 int ipmi_request_settime(ipmi_user_t user,
1789 struct ipmi_addr *addr,
1791 struct kernel_ipmi_msg *msg,
1792 void *user_msg_data,
1795 unsigned int retry_time_ms)
1797 unsigned char saddr, lun;
1802 rv = check_addr(user->intf, addr, &saddr, &lun);
1805 return i_ipmi_request(user,
1818 EXPORT_SYMBOL(ipmi_request_settime);
1820 int ipmi_request_supply_msgs(ipmi_user_t user,
1821 struct ipmi_addr *addr,
1823 struct kernel_ipmi_msg *msg,
1824 void *user_msg_data,
1826 struct ipmi_recv_msg *supplied_recv,
1829 unsigned char saddr, lun;
1834 rv = check_addr(user->intf, addr, &saddr, &lun);
1837 return i_ipmi_request(user,
1850 EXPORT_SYMBOL(ipmi_request_supply_msgs);
1852 #ifdef CONFIG_PROC_FS
1853 static int ipmb_file_read_proc(char *page, char **start, off_t off,
1854 int count, int *eof, void *data)
1856 char *out = (char *) page;
1857 ipmi_smi_t intf = data;
1861 for (i = 0; i < IPMI_MAX_CHANNELS; i++)
1862 rv += sprintf(out+rv, "%x ", intf->channels[i].address);
1863 out[rv-1] = '\n'; /* Replace the final space with a newline */
1869 static int version_file_read_proc(char *page, char **start, off_t off,
1870 int count, int *eof, void *data)
1872 char *out = (char *) page;
1873 ipmi_smi_t intf = data;
1875 return sprintf(out, "%u.%u\n",
1876 ipmi_version_major(&intf->bmc->id),
1877 ipmi_version_minor(&intf->bmc->id));
1880 static int stat_file_read_proc(char *page, char **start, off_t off,
1881 int count, int *eof, void *data)
1883 char *out = (char *) page;
1884 ipmi_smi_t intf = data;
1886 out += sprintf(out, "sent_invalid_commands: %u\n",
1887 ipmi_get_stat(intf, sent_invalid_commands));
1888 out += sprintf(out, "sent_local_commands: %u\n",
1889 ipmi_get_stat(intf, sent_local_commands));
1890 out += sprintf(out, "handled_local_responses: %u\n",
1891 ipmi_get_stat(intf, handled_local_responses));
1892 out += sprintf(out, "unhandled_local_responses: %u\n",
1893 ipmi_get_stat(intf, unhandled_local_responses));
1894 out += sprintf(out, "sent_ipmb_commands: %u\n",
1895 ipmi_get_stat(intf, sent_ipmb_commands));
1896 out += sprintf(out, "sent_ipmb_command_errs: %u\n",
1897 ipmi_get_stat(intf, sent_ipmb_command_errs));
1898 out += sprintf(out, "retransmitted_ipmb_commands: %u\n",
1899 ipmi_get_stat(intf, retransmitted_ipmb_commands));
1900 out += sprintf(out, "timed_out_ipmb_commands: %u\n",
1901 ipmi_get_stat(intf, timed_out_ipmb_commands));
1902 out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n",
1903 ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
1904 out += sprintf(out, "sent_ipmb_responses: %u\n",
1905 ipmi_get_stat(intf, sent_ipmb_responses));
1906 out += sprintf(out, "handled_ipmb_responses: %u\n",
1907 ipmi_get_stat(intf, handled_ipmb_responses));
1908 out += sprintf(out, "invalid_ipmb_responses: %u\n",
1909 ipmi_get_stat(intf, invalid_ipmb_responses));
1910 out += sprintf(out, "unhandled_ipmb_responses: %u\n",
1911 ipmi_get_stat(intf, unhandled_ipmb_responses));
1912 out += sprintf(out, "sent_lan_commands: %u\n",
1913 ipmi_get_stat(intf, sent_lan_commands));
1914 out += sprintf(out, "sent_lan_command_errs: %u\n",
1915 ipmi_get_stat(intf, sent_lan_command_errs));
1916 out += sprintf(out, "retransmitted_lan_commands: %u\n",
1917 ipmi_get_stat(intf, retransmitted_lan_commands));
1918 out += sprintf(out, "timed_out_lan_commands: %u\n",
1919 ipmi_get_stat(intf, timed_out_lan_commands));
1920 out += sprintf(out, "sent_lan_responses: %u\n",
1921 ipmi_get_stat(intf, sent_lan_responses));
1922 out += sprintf(out, "handled_lan_responses: %u\n",
1923 ipmi_get_stat(intf, handled_lan_responses));
1924 out += sprintf(out, "invalid_lan_responses: %u\n",
1925 ipmi_get_stat(intf, invalid_lan_responses));
1926 out += sprintf(out, "unhandled_lan_responses: %u\n",
1927 ipmi_get_stat(intf, unhandled_lan_responses));
1928 out += sprintf(out, "handled_commands: %u\n",
1929 ipmi_get_stat(intf, handled_commands));
1930 out += sprintf(out, "invalid_commands: %u\n",
1931 ipmi_get_stat(intf, invalid_commands));
1932 out += sprintf(out, "unhandled_commands: %u\n",
1933 ipmi_get_stat(intf, unhandled_commands));
1934 out += sprintf(out, "invalid_events: %u\n",
1935 ipmi_get_stat(intf, invalid_events));
1936 out += sprintf(out, "events: %u\n",
1937 ipmi_get_stat(intf, events));
1939 return (out - ((char *) page));
1941 #endif /* CONFIG_PROC_FS */
1943 int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
1944 read_proc_t *read_proc, write_proc_t *write_proc,
1945 void *data, struct module *owner)
1948 #ifdef CONFIG_PROC_FS
1949 struct proc_dir_entry *file;
1950 struct ipmi_proc_entry *entry;
1952 /* Create a list element. */
1953 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1956 entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
1961 strcpy(entry->name, name);
1963 file = create_proc_entry(name, 0, smi->proc_dir);
1970 file->read_proc = read_proc;
1971 file->write_proc = write_proc;
1972 file->owner = owner;
1974 mutex_lock(&smi->proc_entry_lock);
1975 /* Stick it on the list. */
1976 entry->next = smi->proc_entries;
1977 smi->proc_entries = entry;
1978 mutex_unlock(&smi->proc_entry_lock);
1980 #endif /* CONFIG_PROC_FS */
1984 EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
1986 static int add_proc_entries(ipmi_smi_t smi, int num)
1990 #ifdef CONFIG_PROC_FS
1991 sprintf(smi->proc_dir_name, "%d", num);
1992 smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
1996 smi->proc_dir->owner = THIS_MODULE;
1999 rv = ipmi_smi_add_proc_entry(smi, "stats",
2000 stat_file_read_proc, NULL,
2004 rv = ipmi_smi_add_proc_entry(smi, "ipmb",
2005 ipmb_file_read_proc, NULL,
2009 rv = ipmi_smi_add_proc_entry(smi, "version",
2010 version_file_read_proc, NULL,
2012 #endif /* CONFIG_PROC_FS */
2017 static void remove_proc_entries(ipmi_smi_t smi)
2019 #ifdef CONFIG_PROC_FS
2020 struct ipmi_proc_entry *entry;
2022 mutex_lock(&smi->proc_entry_lock);
2023 while (smi->proc_entries) {
2024 entry = smi->proc_entries;
2025 smi->proc_entries = entry->next;
2027 remove_proc_entry(entry->name, smi->proc_dir);
2031 mutex_unlock(&smi->proc_entry_lock);
2032 remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
2033 #endif /* CONFIG_PROC_FS */
2036 static int __find_bmc_guid(struct device *dev, void *data)
2038 unsigned char *id = data;
2039 struct bmc_device *bmc = dev_get_drvdata(dev);
2040 return memcmp(bmc->guid, id, 16) == 0;
2043 static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
2044 unsigned char *guid)
2048 dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
2050 return dev_get_drvdata(dev);
2055 struct prod_dev_id {
2056 unsigned int product_id;
2057 unsigned char device_id;
2060 static int __find_bmc_prod_dev_id(struct device *dev, void *data)
2062 struct prod_dev_id *id = data;
2063 struct bmc_device *bmc = dev_get_drvdata(dev);
2065 return (bmc->id.product_id == id->product_id
2066 && bmc->id.device_id == id->device_id);
2069 static struct bmc_device *ipmi_find_bmc_prod_dev_id(
2070 struct device_driver *drv,
2071 unsigned int product_id, unsigned char device_id)
2073 struct prod_dev_id id = {
2074 .product_id = product_id,
2075 .device_id = device_id,
2079 dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
2081 return dev_get_drvdata(dev);
2086 static ssize_t device_id_show(struct device *dev,
2087 struct device_attribute *attr,
2090 struct bmc_device *bmc = dev_get_drvdata(dev);
2092 return snprintf(buf, 10, "%u\n", bmc->id.device_id);
2095 static ssize_t provides_dev_sdrs_show(struct device *dev,
2096 struct device_attribute *attr,
2099 struct bmc_device *bmc = dev_get_drvdata(dev);
2101 return snprintf(buf, 10, "%u\n",
2102 (bmc->id.device_revision & 0x80) >> 7);
2105 static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
2108 struct bmc_device *bmc = dev_get_drvdata(dev);
2110 return snprintf(buf, 20, "%u\n",
2111 bmc->id.device_revision & 0x0F);
2114 static ssize_t firmware_rev_show(struct device *dev,
2115 struct device_attribute *attr,
2118 struct bmc_device *bmc = dev_get_drvdata(dev);
2120 return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
2121 bmc->id.firmware_revision_2);
2124 static ssize_t ipmi_version_show(struct device *dev,
2125 struct device_attribute *attr,
2128 struct bmc_device *bmc = dev_get_drvdata(dev);
2130 return snprintf(buf, 20, "%u.%u\n",
2131 ipmi_version_major(&bmc->id),
2132 ipmi_version_minor(&bmc->id));
2135 static ssize_t add_dev_support_show(struct device *dev,
2136 struct device_attribute *attr,
2139 struct bmc_device *bmc = dev_get_drvdata(dev);
2141 return snprintf(buf, 10, "0x%02x\n",
2142 bmc->id.additional_device_support);
2145 static ssize_t manufacturer_id_show(struct device *dev,
2146 struct device_attribute *attr,
2149 struct bmc_device *bmc = dev_get_drvdata(dev);
2151 return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
2154 static ssize_t product_id_show(struct device *dev,
2155 struct device_attribute *attr,
2158 struct bmc_device *bmc = dev_get_drvdata(dev);
2160 return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
2163 static ssize_t aux_firmware_rev_show(struct device *dev,
2164 struct device_attribute *attr,
2167 struct bmc_device *bmc = dev_get_drvdata(dev);
2169 return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2170 bmc->id.aux_firmware_revision[3],
2171 bmc->id.aux_firmware_revision[2],
2172 bmc->id.aux_firmware_revision[1],
2173 bmc->id.aux_firmware_revision[0]);
2176 static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
2179 struct bmc_device *bmc = dev_get_drvdata(dev);
2181 return snprintf(buf, 100, "%Lx%Lx\n",
2182 (long long) bmc->guid[0],
2183 (long long) bmc->guid[8]);
2186 static void remove_files(struct bmc_device *bmc)
2191 device_remove_file(&bmc->dev->dev,
2192 &bmc->device_id_attr);
2193 device_remove_file(&bmc->dev->dev,
2194 &bmc->provides_dev_sdrs_attr);
2195 device_remove_file(&bmc->dev->dev,
2196 &bmc->revision_attr);
2197 device_remove_file(&bmc->dev->dev,
2198 &bmc->firmware_rev_attr);
2199 device_remove_file(&bmc->dev->dev,
2200 &bmc->version_attr);
2201 device_remove_file(&bmc->dev->dev,
2202 &bmc->add_dev_support_attr);
2203 device_remove_file(&bmc->dev->dev,
2204 &bmc->manufacturer_id_attr);
2205 device_remove_file(&bmc->dev->dev,
2206 &bmc->product_id_attr);
2208 if (bmc->id.aux_firmware_revision_set)
2209 device_remove_file(&bmc->dev->dev,
2210 &bmc->aux_firmware_rev_attr);
2212 device_remove_file(&bmc->dev->dev,
2217 cleanup_bmc_device(struct kref *ref)
2219 struct bmc_device *bmc;
2221 bmc = container_of(ref, struct bmc_device, refcount);
2224 platform_device_unregister(bmc->dev);
2228 static void ipmi_bmc_unregister(ipmi_smi_t intf)
2230 struct bmc_device *bmc = intf->bmc;
2232 if (intf->sysfs_name) {
2233 sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
2234 kfree(intf->sysfs_name);
2235 intf->sysfs_name = NULL;
2237 if (intf->my_dev_name) {
2238 sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
2239 kfree(intf->my_dev_name);
2240 intf->my_dev_name = NULL;
2243 mutex_lock(&ipmidriver_mutex);
2244 kref_put(&bmc->refcount, cleanup_bmc_device);
2246 mutex_unlock(&ipmidriver_mutex);
2249 static int create_files(struct bmc_device *bmc)
2253 bmc->device_id_attr.attr.name = "device_id";
2254 bmc->device_id_attr.attr.mode = S_IRUGO;
2255 bmc->device_id_attr.show = device_id_show;
2257 bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
2258 bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
2259 bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
2261 bmc->revision_attr.attr.name = "revision";
2262 bmc->revision_attr.attr.mode = S_IRUGO;
2263 bmc->revision_attr.show = revision_show;
2265 bmc->firmware_rev_attr.attr.name = "firmware_revision";
2266 bmc->firmware_rev_attr.attr.mode = S_IRUGO;
2267 bmc->firmware_rev_attr.show = firmware_rev_show;
2269 bmc->version_attr.attr.name = "ipmi_version";
2270 bmc->version_attr.attr.mode = S_IRUGO;
2271 bmc->version_attr.show = ipmi_version_show;
2273 bmc->add_dev_support_attr.attr.name = "additional_device_support";
2274 bmc->add_dev_support_attr.attr.mode = S_IRUGO;
2275 bmc->add_dev_support_attr.show = add_dev_support_show;
2277 bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
2278 bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
2279 bmc->manufacturer_id_attr.show = manufacturer_id_show;
2281 bmc->product_id_attr.attr.name = "product_id";
2282 bmc->product_id_attr.attr.mode = S_IRUGO;
2283 bmc->product_id_attr.show = product_id_show;
2285 bmc->guid_attr.attr.name = "guid";
2286 bmc->guid_attr.attr.mode = S_IRUGO;
2287 bmc->guid_attr.show = guid_show;
2289 bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
2290 bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
2291 bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
2293 err = device_create_file(&bmc->dev->dev,
2294 &bmc->device_id_attr);
2297 err = device_create_file(&bmc->dev->dev,
2298 &bmc->provides_dev_sdrs_attr);
2301 err = device_create_file(&bmc->dev->dev,
2302 &bmc->revision_attr);
2305 err = device_create_file(&bmc->dev->dev,
2306 &bmc->firmware_rev_attr);
2309 err = device_create_file(&bmc->dev->dev,
2310 &bmc->version_attr);
2313 err = device_create_file(&bmc->dev->dev,
2314 &bmc->add_dev_support_attr);
2317 err = device_create_file(&bmc->dev->dev,
2318 &bmc->manufacturer_id_attr);
2321 err = device_create_file(&bmc->dev->dev,
2322 &bmc->product_id_attr);
2325 if (bmc->id.aux_firmware_revision_set) {
2326 err = device_create_file(&bmc->dev->dev,
2327 &bmc->aux_firmware_rev_attr);
2331 if (bmc->guid_set) {
2332 err = device_create_file(&bmc->dev->dev,
2341 if (bmc->id.aux_firmware_revision_set)
2342 device_remove_file(&bmc->dev->dev,
2343 &bmc->aux_firmware_rev_attr);
2345 device_remove_file(&bmc->dev->dev,
2346 &bmc->product_id_attr);
2348 device_remove_file(&bmc->dev->dev,
2349 &bmc->manufacturer_id_attr);
2351 device_remove_file(&bmc->dev->dev,
2352 &bmc->add_dev_support_attr);
2354 device_remove_file(&bmc->dev->dev,
2355 &bmc->version_attr);
2357 device_remove_file(&bmc->dev->dev,
2358 &bmc->firmware_rev_attr);
2360 device_remove_file(&bmc->dev->dev,
2361 &bmc->revision_attr);
2363 device_remove_file(&bmc->dev->dev,
2364 &bmc->provides_dev_sdrs_attr);
2366 device_remove_file(&bmc->dev->dev,
2367 &bmc->device_id_attr);
2372 static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
2373 const char *sysfs_name)
2376 struct bmc_device *bmc = intf->bmc;
2377 struct bmc_device *old_bmc;
2381 mutex_lock(&ipmidriver_mutex);
2384 * Try to find if there is an bmc_device struct
2385 * representing the interfaced BMC already
2388 old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid);
2390 old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver,
2395 * If there is already an bmc_device, free the new one,
2396 * otherwise register the new BMC device
2400 intf->bmc = old_bmc;
2403 kref_get(&bmc->refcount);
2404 mutex_unlock(&ipmidriver_mutex);
2407 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2408 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2409 bmc->id.manufacturer_id,
2414 unsigned char orig_dev_id = bmc->id.device_id;
2415 int warn_printed = 0;
2417 snprintf(name, sizeof(name),
2418 "ipmi_bmc.%4.4x", bmc->id.product_id);
2420 while (ipmi_find_bmc_prod_dev_id(&ipmidriver,
2422 bmc->id.device_id)) {
2423 if (!warn_printed) {
2424 printk(KERN_WARNING PFX
2425 "This machine has two different BMCs"
2426 " with the same product id and device"
2427 " id. This is an error in the"
2428 " firmware, but incrementing the"
2429 " device id to work around the problem."
2430 " Prod ID = 0x%x, Dev ID = 0x%x\n",
2431 bmc->id.product_id, bmc->id.device_id);
2434 bmc->id.device_id++; /* Wraps at 255 */
2435 if (bmc->id.device_id == orig_dev_id) {
2437 "Out of device ids!\n");
2442 bmc->dev = platform_device_alloc(name, bmc->id.device_id);
2444 mutex_unlock(&ipmidriver_mutex);
2447 " Unable to allocate platform device\n");
2450 bmc->dev->dev.driver = &ipmidriver;
2451 dev_set_drvdata(&bmc->dev->dev, bmc);
2452 kref_init(&bmc->refcount);
2454 rv = platform_device_add(bmc->dev);
2455 mutex_unlock(&ipmidriver_mutex);
2457 platform_device_put(bmc->dev);
2461 " Unable to register bmc device: %d\n",
2464 * Don't go to out_err, you can only do that if
2465 * the device is registered already.
2470 rv = create_files(bmc);
2472 mutex_lock(&ipmidriver_mutex);
2473 platform_device_unregister(bmc->dev);
2474 mutex_unlock(&ipmidriver_mutex);
2480 "ipmi: Found new BMC (man_id: 0x%6.6x, "
2481 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2482 bmc->id.manufacturer_id,
2488 * create symlink from system interface device to bmc device
2491 intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
2492 if (!intf->sysfs_name) {
2495 "ipmi_msghandler: allocate link to BMC: %d\n",
2500 rv = sysfs_create_link(&intf->si_dev->kobj,
2501 &bmc->dev->dev.kobj, intf->sysfs_name);
2503 kfree(intf->sysfs_name);
2504 intf->sysfs_name = NULL;
2506 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2511 size = snprintf(dummy, 0, "ipmi%d", ifnum);
2512 intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
2513 if (!intf->my_dev_name) {
2514 kfree(intf->sysfs_name);
2515 intf->sysfs_name = NULL;
2518 "ipmi_msghandler: allocate link from BMC: %d\n",
2522 snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
2524 rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
2527 kfree(intf->sysfs_name);
2528 intf->sysfs_name = NULL;
2529 kfree(intf->my_dev_name);
2530 intf->my_dev_name = NULL;
2533 " Unable to create symlink to bmc: %d\n",
2541 ipmi_bmc_unregister(intf);
2546 send_guid_cmd(ipmi_smi_t intf, int chan)
2548 struct kernel_ipmi_msg msg;
2549 struct ipmi_system_interface_addr si;
2551 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2552 si.channel = IPMI_BMC_CHANNEL;
2555 msg.netfn = IPMI_NETFN_APP_REQUEST;
2556 msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2559 return i_ipmi_request(NULL,
2561 (struct ipmi_addr *) &si,
2568 intf->channels[0].address,
2569 intf->channels[0].lun,
2574 guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2576 if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2577 || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2578 || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2582 if (msg->msg.data[0] != 0) {
2583 /* Error from getting the GUID, the BMC doesn't have one. */
2584 intf->bmc->guid_set = 0;
2588 if (msg->msg.data_len < 17) {
2589 intf->bmc->guid_set = 0;
2590 printk(KERN_WARNING PFX
2591 "guid_handler: The GUID response from the BMC was too"
2592 " short, it was %d but should have been 17. Assuming"
2593 " GUID is not available.\n",
2598 memcpy(intf->bmc->guid, msg->msg.data, 16);
2599 intf->bmc->guid_set = 1;
2601 wake_up(&intf->waitq);
2605 get_guid(ipmi_smi_t intf)
2609 intf->bmc->guid_set = 0x2;
2610 intf->null_user_handler = guid_handler;
2611 rv = send_guid_cmd(intf, 0);
2613 /* Send failed, no GUID available. */
2614 intf->bmc->guid_set = 0;
2615 wait_event(intf->waitq, intf->bmc->guid_set != 2);
2616 intf->null_user_handler = NULL;
2620 send_channel_info_cmd(ipmi_smi_t intf, int chan)
2622 struct kernel_ipmi_msg msg;
2623 unsigned char data[1];
2624 struct ipmi_system_interface_addr si;
2626 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2627 si.channel = IPMI_BMC_CHANNEL;
2630 msg.netfn = IPMI_NETFN_APP_REQUEST;
2631 msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2635 return i_ipmi_request(NULL,
2637 (struct ipmi_addr *) &si,
2644 intf->channels[0].address,
2645 intf->channels[0].lun,
2650 channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2655 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2656 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
2657 && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
2658 /* It's the one we want */
2659 if (msg->msg.data[0] != 0) {
2660 /* Got an error from the channel, just go on. */
2662 if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
2664 * If the MC does not support this
2665 * command, that is legal. We just
2666 * assume it has one IPMB at channel
2669 intf->channels[0].medium
2670 = IPMI_CHANNEL_MEDIUM_IPMB;
2671 intf->channels[0].protocol
2672 = IPMI_CHANNEL_PROTOCOL_IPMB;
2675 intf->curr_channel = IPMI_MAX_CHANNELS;
2676 wake_up(&intf->waitq);
2681 if (msg->msg.data_len < 4) {
2682 /* Message not big enough, just go on. */
2685 chan = intf->curr_channel;
2686 intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2687 intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
2690 intf->curr_channel++;
2691 if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2692 wake_up(&intf->waitq);
2694 rv = send_channel_info_cmd(intf, intf->curr_channel);
2697 /* Got an error somehow, just give up. */
2698 intf->curr_channel = IPMI_MAX_CHANNELS;
2699 wake_up(&intf->waitq);
2701 printk(KERN_WARNING PFX
2702 "Error sending channel information: %d\n",
2710 void ipmi_poll_interface(ipmi_user_t user)
2712 ipmi_smi_t intf = user->intf;
2714 if (intf->handlers->poll)
2715 intf->handlers->poll(intf->send_info);
2717 EXPORT_SYMBOL(ipmi_poll_interface);
2719 int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2721 struct ipmi_device_id *device_id,
2722 struct device *si_dev,
2723 const char *sysfs_name,
2724 unsigned char slave_addr)
2730 struct list_head *link;
2733 * Make sure the driver is actually initialized, this handles
2734 * problems with initialization order.
2737 rv = ipmi_init_msghandler();
2741 * The init code doesn't return an error if it was turned
2742 * off, but it won't initialize. Check that.
2748 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
2752 intf->ipmi_version_major = ipmi_version_major(device_id);
2753 intf->ipmi_version_minor = ipmi_version_minor(device_id);
2755 intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2760 intf->intf_num = -1; /* Mark it invalid for now. */
2761 kref_init(&intf->refcount);
2762 intf->bmc->id = *device_id;
2763 intf->si_dev = si_dev;
2764 for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2765 intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2766 intf->channels[j].lun = 2;
2768 if (slave_addr != 0)
2769 intf->channels[0].address = slave_addr;
2770 INIT_LIST_HEAD(&intf->users);
2771 intf->handlers = handlers;
2772 intf->send_info = send_info;
2773 spin_lock_init(&intf->seq_lock);
2774 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2775 intf->seq_table[j].inuse = 0;
2776 intf->seq_table[j].seqid = 0;
2779 #ifdef CONFIG_PROC_FS
2780 mutex_init(&intf->proc_entry_lock);
2782 spin_lock_init(&intf->waiting_msgs_lock);
2783 INIT_LIST_HEAD(&intf->waiting_msgs);
2784 spin_lock_init(&intf->events_lock);
2785 INIT_LIST_HEAD(&intf->waiting_events);
2786 intf->waiting_events_count = 0;
2787 mutex_init(&intf->cmd_rcvrs_mutex);
2788 spin_lock_init(&intf->maintenance_mode_lock);
2789 INIT_LIST_HEAD(&intf->cmd_rcvrs);
2790 init_waitqueue_head(&intf->waitq);
2791 for (i = 0; i < IPMI_NUM_STATS; i++)
2792 atomic_set(&intf->stats[i], 0);
2794 intf->proc_dir = NULL;
2796 mutex_lock(&smi_watchers_mutex);
2797 mutex_lock(&ipmi_interfaces_mutex);
2798 /* Look for a hole in the numbers. */
2800 link = &ipmi_interfaces;
2801 list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
2802 if (tintf->intf_num != i) {
2803 link = &tintf->link;
2808 /* Add the new interface in numeric order. */
2810 list_add_rcu(&intf->link, &ipmi_interfaces);
2812 list_add_tail_rcu(&intf->link, link);
2814 rv = handlers->start_processing(send_info, intf);
2820 if ((intf->ipmi_version_major > 1)
2821 || ((intf->ipmi_version_major == 1)
2822 && (intf->ipmi_version_minor >= 5))) {
2824 * Start scanning the channels to see what is
2827 intf->null_user_handler = channel_handler;
2828 intf->curr_channel = 0;
2829 rv = send_channel_info_cmd(intf, 0);
2833 /* Wait for the channel info to be read. */
2834 wait_event(intf->waitq,
2835 intf->curr_channel >= IPMI_MAX_CHANNELS);
2836 intf->null_user_handler = NULL;
2838 /* Assume a single IPMB channel at zero. */
2839 intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2840 intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
2844 rv = add_proc_entries(intf, i);
2846 rv = ipmi_bmc_register(intf, i, sysfs_name);
2851 remove_proc_entries(intf);
2852 intf->handlers = NULL;
2853 list_del_rcu(&intf->link);
2854 mutex_unlock(&ipmi_interfaces_mutex);
2855 mutex_unlock(&smi_watchers_mutex);
2857 kref_put(&intf->refcount, intf_free);
2860 * Keep memory order straight for RCU readers. Make
2861 * sure everything else is committed to memory before
2862 * setting intf_num to mark the interface valid.
2866 mutex_unlock(&ipmi_interfaces_mutex);
2867 /* After this point the interface is legal to use. */
2868 call_smi_watchers(i, intf->si_dev);
2869 mutex_unlock(&smi_watchers_mutex);
2874 EXPORT_SYMBOL(ipmi_register_smi);
2876 static void cleanup_smi_msgs(ipmi_smi_t intf)
2879 struct seq_table *ent;
2881 /* No need for locks, the interface is down. */
2882 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
2883 ent = &(intf->seq_table[i]);
2886 deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
2890 int ipmi_unregister_smi(ipmi_smi_t intf)
2892 struct ipmi_smi_watcher *w;
2893 int intf_num = intf->intf_num;
2895 ipmi_bmc_unregister(intf);
2897 mutex_lock(&smi_watchers_mutex);
2898 mutex_lock(&ipmi_interfaces_mutex);
2899 intf->intf_num = -1;
2900 intf->handlers = NULL;
2901 list_del_rcu(&intf->link);
2902 mutex_unlock(&ipmi_interfaces_mutex);
2905 cleanup_smi_msgs(intf);
2907 remove_proc_entries(intf);
2910 * Call all the watcher interfaces to tell them that
2911 * an interface is gone.
2913 list_for_each_entry(w, &smi_watchers, link)
2914 w->smi_gone(intf_num);
2915 mutex_unlock(&smi_watchers_mutex);
2917 kref_put(&intf->refcount, intf_free);
2920 EXPORT_SYMBOL(ipmi_unregister_smi);
2922 static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
2923 struct ipmi_smi_msg *msg)
2925 struct ipmi_ipmb_addr ipmb_addr;
2926 struct ipmi_recv_msg *recv_msg;
2929 * This is 11, not 10, because the response must contain a
2932 if (msg->rsp_size < 11) {
2933 /* Message not big enough, just ignore it. */
2934 ipmi_inc_stat(intf, invalid_ipmb_responses);
2938 if (msg->rsp[2] != 0) {
2939 /* An error getting the response, just ignore it. */
2943 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
2944 ipmb_addr.slave_addr = msg->rsp[6];
2945 ipmb_addr.channel = msg->rsp[3] & 0x0f;
2946 ipmb_addr.lun = msg->rsp[7] & 3;
2949 * It's a response from a remote entity. Look up the sequence
2950 * number and handle the response.
2952 if (intf_find_seq(intf,
2956 (msg->rsp[4] >> 2) & (~1),
2957 (struct ipmi_addr *) &(ipmb_addr),
2960 * We were unable to find the sequence number,
2961 * so just nuke the message.
2963 ipmi_inc_stat(intf, unhandled_ipmb_responses);
2967 memcpy(recv_msg->msg_data,
2971 * The other fields matched, so no need to set them, except
2972 * for netfn, which needs to be the response that was
2973 * returned, not the request value.
2975 recv_msg->msg.netfn = msg->rsp[4] >> 2;
2976 recv_msg->msg.data = recv_msg->msg_data;
2977 recv_msg->msg.data_len = msg->rsp_size - 10;
2978 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
2979 ipmi_inc_stat(intf, handled_ipmb_responses);
2980 deliver_response(recv_msg);
2985 static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
2986 struct ipmi_smi_msg *msg)
2988 struct cmd_rcvr *rcvr;
2990 unsigned char netfn;
2993 ipmi_user_t user = NULL;
2994 struct ipmi_ipmb_addr *ipmb_addr;
2995 struct ipmi_recv_msg *recv_msg;
2996 struct ipmi_smi_handlers *handlers;
2998 if (msg->rsp_size < 10) {
2999 /* Message not big enough, just ignore it. */
3000 ipmi_inc_stat(intf, invalid_commands);
3004 if (msg->rsp[2] != 0) {
3005 /* An error getting the response, just ignore it. */
3009 netfn = msg->rsp[4] >> 2;
3011 chan = msg->rsp[3] & 0xf;
3014 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3017 kref_get(&user->refcount);
3023 /* We didn't find a user, deliver an error response. */
3024 ipmi_inc_stat(intf, unhandled_commands);
3026 msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
3027 msg->data[1] = IPMI_SEND_MSG_CMD;
3028 msg->data[2] = msg->rsp[3];
3029 msg->data[3] = msg->rsp[6];
3030 msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
3031 msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
3032 msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
3034 msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
3035 msg->data[8] = msg->rsp[8]; /* cmd */
3036 msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
3037 msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
3038 msg->data_size = 11;
3043 printk("Invalid command:");
3044 for (m = 0; m < msg->data_size; m++)
3045 printk(" %2.2x", msg->data[m]);
3050 handlers = intf->handlers;
3052 handlers->sender(intf->send_info, msg, 0);
3054 * We used the message, so return the value
3055 * that causes it to not be freed or
3062 /* Deliver the message to the user. */
3063 ipmi_inc_stat(intf, handled_commands);
3065 recv_msg = ipmi_alloc_recv_msg();
3068 * We couldn't allocate memory for the
3069 * message, so requeue it for handling
3073 kref_put(&user->refcount, free_user);
3075 /* Extract the source address from the data. */
3076 ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
3077 ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
3078 ipmb_addr->slave_addr = msg->rsp[6];
3079 ipmb_addr->lun = msg->rsp[7] & 3;
3080 ipmb_addr->channel = msg->rsp[3] & 0xf;
3083 * Extract the rest of the message information
3084 * from the IPMB header.
3086 recv_msg->user = user;
3087 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3088 recv_msg->msgid = msg->rsp[7] >> 2;
3089 recv_msg->msg.netfn = msg->rsp[4] >> 2;
3090 recv_msg->msg.cmd = msg->rsp[8];
3091 recv_msg->msg.data = recv_msg->msg_data;
3094 * We chop off 10, not 9 bytes because the checksum
3095 * at the end also needs to be removed.
3097 recv_msg->msg.data_len = msg->rsp_size - 10;
3098 memcpy(recv_msg->msg_data,
3100 msg->rsp_size - 10);
3101 deliver_response(recv_msg);
3108 static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
3109 struct ipmi_smi_msg *msg)
3111 struct ipmi_lan_addr lan_addr;
3112 struct ipmi_recv_msg *recv_msg;
3116 * This is 13, not 12, because the response must contain a
3119 if (msg->rsp_size < 13) {
3120 /* Message not big enough, just ignore it. */
3121 ipmi_inc_stat(intf, invalid_lan_responses);
3125 if (msg->rsp[2] != 0) {
3126 /* An error getting the response, just ignore it. */
3130 lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
3131 lan_addr.session_handle = msg->rsp[4];
3132 lan_addr.remote_SWID = msg->rsp[8];
3133 lan_addr.local_SWID = msg->rsp[5];
3134 lan_addr.channel = msg->rsp[3] & 0x0f;
3135 lan_addr.privilege = msg->rsp[3] >> 4;
3136 lan_addr.lun = msg->rsp[9] & 3;
3139 * It's a response from a remote entity. Look up the sequence
3140 * number and handle the response.
3142 if (intf_find_seq(intf,
3146 (msg->rsp[6] >> 2) & (~1),
3147 (struct ipmi_addr *) &(lan_addr),
3150 * We were unable to find the sequence number,
3151 * so just nuke the message.
3153 ipmi_inc_stat(intf, unhandled_lan_responses);
3157 memcpy(recv_msg->msg_data,
3159 msg->rsp_size - 11);
3161 * The other fields matched, so no need to set them, except
3162 * for netfn, which needs to be the response that was
3163 * returned, not the request value.
3165 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3166 recv_msg->msg.data = recv_msg->msg_data;
3167 recv_msg->msg.data_len = msg->rsp_size - 12;
3168 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3169 ipmi_inc_stat(intf, handled_lan_responses);
3170 deliver_response(recv_msg);
3175 static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
3176 struct ipmi_smi_msg *msg)
3178 struct cmd_rcvr *rcvr;
3180 unsigned char netfn;
3183 ipmi_user_t user = NULL;
3184 struct ipmi_lan_addr *lan_addr;
3185 struct ipmi_recv_msg *recv_msg;
3187 if (msg->rsp_size < 12) {
3188 /* Message not big enough, just ignore it. */
3189 ipmi_inc_stat(intf, invalid_commands);
3193 if (msg->rsp[2] != 0) {
3194 /* An error getting the response, just ignore it. */
3198 netfn = msg->rsp[6] >> 2;
3200 chan = msg->rsp[3] & 0xf;
3203 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3206 kref_get(&user->refcount);
3212 /* We didn't find a user, just give up. */
3213 ipmi_inc_stat(intf, unhandled_commands);
3216 * Don't do anything with these messages, just allow
3221 /* Deliver the message to the user. */
3222 ipmi_inc_stat(intf, handled_commands);
3224 recv_msg = ipmi_alloc_recv_msg();
3227 * We couldn't allocate memory for the
3228 * message, so requeue it for handling later.
3231 kref_put(&user->refcount, free_user);
3233 /* Extract the source address from the data. */
3234 lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
3235 lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
3236 lan_addr->session_handle = msg->rsp[4];
3237 lan_addr->remote_SWID = msg->rsp[8];
3238 lan_addr->local_SWID = msg->rsp[5];
3239 lan_addr->lun = msg->rsp[9] & 3;
3240 lan_addr->channel = msg->rsp[3] & 0xf;
3241 lan_addr->privilege = msg->rsp[3] >> 4;
3244 * Extract the rest of the message information
3245 * from the IPMB header.
3247 recv_msg->user = user;
3248 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3249 recv_msg->msgid = msg->rsp[9] >> 2;
3250 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3251 recv_msg->msg.cmd = msg->rsp[10];
3252 recv_msg->msg.data = recv_msg->msg_data;
3255 * We chop off 12, not 11 bytes because the checksum
3256 * at the end also needs to be removed.
3258 recv_msg->msg.data_len = msg->rsp_size - 12;
3259 memcpy(recv_msg->msg_data,
3261 msg->rsp_size - 12);
3262 deliver_response(recv_msg);
3269 static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
3270 struct ipmi_smi_msg *msg)
3272 struct ipmi_system_interface_addr *smi_addr;
3274 recv_msg->msgid = 0;
3275 smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
3276 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3277 smi_addr->channel = IPMI_BMC_CHANNEL;
3278 smi_addr->lun = msg->rsp[0] & 3;
3279 recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
3280 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3281 recv_msg->msg.cmd = msg->rsp[1];
3282 memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
3283 recv_msg->msg.data = recv_msg->msg_data;
3284 recv_msg->msg.data_len = msg->rsp_size - 3;
3287 static int handle_read_event_rsp(ipmi_smi_t intf,
3288 struct ipmi_smi_msg *msg)
3290 struct ipmi_recv_msg *recv_msg, *recv_msg2;
3291 struct list_head msgs;
3294 int deliver_count = 0;
3295 unsigned long flags;
3297 if (msg->rsp_size < 19) {
3298 /* Message is too small to be an IPMB event. */
3299 ipmi_inc_stat(intf, invalid_events);
3303 if (msg->rsp[2] != 0) {
3304 /* An error getting the event, just ignore it. */
3308 INIT_LIST_HEAD(&msgs);
3310 spin_lock_irqsave(&intf->events_lock, flags);
3312 ipmi_inc_stat(intf, events);
3315 * Allocate and fill in one message for every user that is
3319 list_for_each_entry_rcu(user, &intf->users, link) {
3320 if (!user->gets_events)
3323 recv_msg = ipmi_alloc_recv_msg();
3326 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
3328 list_del(&recv_msg->link);
3329 ipmi_free_recv_msg(recv_msg);
3332 * We couldn't allocate memory for the
3333 * message, so requeue it for handling
3342 copy_event_into_recv_msg(recv_msg, msg);
3343 recv_msg->user = user;
3344 kref_get(&user->refcount);
3345 list_add_tail(&(recv_msg->link), &msgs);
3349 if (deliver_count) {
3350 /* Now deliver all the messages. */
3351 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
3352 list_del(&recv_msg->link);
3353 deliver_response(recv_msg);
3355 } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
3357 * No one to receive the message, put it in queue if there's
3358 * not already too many things in the queue.
3360 recv_msg = ipmi_alloc_recv_msg();
3363 * We couldn't allocate memory for the
3364 * message, so requeue it for handling
3371 copy_event_into_recv_msg(recv_msg, msg);
3372 list_add_tail(&(recv_msg->link), &(intf->waiting_events));
3373 intf->waiting_events_count++;
3374 } else if (!intf->event_msg_printed) {
3376 * There's too many things in the queue, discard this
3379 printk(KERN_WARNING PFX "Event queue full, discarding"
3380 " incoming events\n");
3381 intf->event_msg_printed = 1;
3385 spin_unlock_irqrestore(&(intf->events_lock), flags);
3390 static int handle_bmc_rsp(ipmi_smi_t intf,
3391 struct ipmi_smi_msg *msg)
3393 struct ipmi_recv_msg *recv_msg;
3394 struct ipmi_user *user;
3396 recv_msg = (struct ipmi_recv_msg *) msg->user_data;
3397 if (recv_msg == NULL) {
3399 "IPMI message received with no owner. This\n"
3400 "could be because of a malformed message, or\n"
3401 "because of a hardware error. Contact your\n"
3402 "hardware vender for assistance\n");
3406 user = recv_msg->user;
3407 /* Make sure the user still exists. */
3408 if (user && !user->valid) {
3409 /* The user for the message went away, so give up. */
3410 ipmi_inc_stat(intf, unhandled_local_responses);
3411 ipmi_free_recv_msg(recv_msg);
3413 struct ipmi_system_interface_addr *smi_addr;
3415 ipmi_inc_stat(intf, handled_local_responses);
3416 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3417 recv_msg->msgid = msg->msgid;
3418 smi_addr = ((struct ipmi_system_interface_addr *)
3420 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3421 smi_addr->channel = IPMI_BMC_CHANNEL;
3422 smi_addr->lun = msg->rsp[0] & 3;
3423 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3424 recv_msg->msg.cmd = msg->rsp[1];
3425 memcpy(recv_msg->msg_data,
3428 recv_msg->msg.data = recv_msg->msg_data;
3429 recv_msg->msg.data_len = msg->rsp_size - 2;
3430 deliver_response(recv_msg);
3437 * Handle a new message. Return 1 if the message should be requeued,
3438 * 0 if the message should be freed, or -1 if the message should not
3439 * be freed or requeued.
3441 static int handle_new_recv_msg(ipmi_smi_t intf,
3442 struct ipmi_smi_msg *msg)
3450 for (m = 0; m < msg->rsp_size; m++)
3451 printk(" %2.2x", msg->rsp[m]);
3454 if (msg->rsp_size < 2) {
3455 /* Message is too small to be correct. */
3456 printk(KERN_WARNING PFX "BMC returned to small a message"
3457 " for netfn %x cmd %x, got %d bytes\n",
3458 (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3460 /* Generate an error response for the message. */
3461 msg->rsp[0] = msg->data[0] | (1 << 2);
3462 msg->rsp[1] = msg->data[1];
3463 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3465 } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
3466 || (msg->rsp[1] != msg->data[1])) {
3468 * The NetFN and Command in the response is not even
3469 * marginally correct.
3471 printk(KERN_WARNING PFX "BMC returned incorrect response,"
3472 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3473 (msg->data[0] >> 2) | 1, msg->data[1],
3474 msg->rsp[0] >> 2, msg->rsp[1]);
3476 /* Generate an error response for the message. */
3477 msg->rsp[0] = msg->data[0] | (1 << 2);
3478 msg->rsp[1] = msg->data[1];
3479 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3483 if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3484 && (msg->rsp[1] == IPMI_SEND_MSG_CMD)
3485 && (msg->user_data != NULL)) {
3487 * It's a response to a response we sent. For this we
3488 * deliver a send message response to the user.
3490 struct ipmi_recv_msg *recv_msg = msg->user_data;
3493 if (msg->rsp_size < 2)
3494 /* Message is too small to be correct. */
3497 chan = msg->data[2] & 0x0f;
3498 if (chan >= IPMI_MAX_CHANNELS)
3499 /* Invalid channel number */
3505 /* Make sure the user still exists. */
3506 if (!recv_msg->user || !recv_msg->user->valid)
3509 recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3510 recv_msg->msg.data = recv_msg->msg_data;
3511 recv_msg->msg.data_len = 1;
3512 recv_msg->msg_data[0] = msg->rsp[2];
3513 deliver_response(recv_msg);
3514 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3515 && (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
3516 /* It's from the receive queue. */
3517 chan = msg->rsp[3] & 0xf;
3518 if (chan >= IPMI_MAX_CHANNELS) {
3519 /* Invalid channel number */
3524 switch (intf->channels[chan].medium) {
3525 case IPMI_CHANNEL_MEDIUM_IPMB:
3526 if (msg->rsp[4] & 0x04) {
3528 * It's a response, so find the
3529 * requesting message and send it up.
3531 requeue = handle_ipmb_get_msg_rsp(intf, msg);
3534 * It's a command to the SMS from some other
3535 * entity. Handle that.
3537 requeue = handle_ipmb_get_msg_cmd(intf, msg);
3541 case IPMI_CHANNEL_MEDIUM_8023LAN:
3542 case IPMI_CHANNEL_MEDIUM_ASYNC:
3543 if (msg->rsp[6] & 0x04) {
3545 * It's a response, so find the
3546 * requesting message and send it up.
3548 requeue = handle_lan_get_msg_rsp(intf, msg);
3551 * It's a command to the SMS from some other
3552 * entity. Handle that.
3554 requeue = handle_lan_get_msg_cmd(intf, msg);
3560 * We don't handle the channel type, so just
3566 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3567 && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
3568 /* It's an asyncronous event. */
3569 requeue = handle_read_event_rsp(intf, msg);
3571 /* It's a response from the local BMC. */
3572 requeue = handle_bmc_rsp(intf, msg);
3579 /* Handle a new message from the lower layer. */
3580 void ipmi_smi_msg_received(ipmi_smi_t intf,
3581 struct ipmi_smi_msg *msg)
3583 unsigned long flags = 0; /* keep us warning-free. */
3585 int run_to_completion;
3588 if ((msg->data_size >= 2)
3589 && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3590 && (msg->data[1] == IPMI_SEND_MSG_CMD)
3591 && (msg->user_data == NULL)) {
3593 * This is the local response to a command send, start
3594 * the timer for these. The user_data will not be
3595 * NULL if this is a response send, and we will let
3596 * response sends just go through.
3600 * Check for errors, if we get certain errors (ones
3601 * that mean basically we can try again later), we
3602 * ignore them and start the timer. Otherwise we
3603 * report the error immediately.
3605 if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3606 && (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
3607 && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
3608 && (msg->rsp[2] != IPMI_BUS_ERR)
3609 && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
3610 int chan = msg->rsp[3] & 0xf;
3612 /* Got an error sending the message, handle it. */
3613 if (chan >= IPMI_MAX_CHANNELS)
3614 ; /* This shouldn't happen */
3615 else if ((intf->channels[chan].medium
3616 == IPMI_CHANNEL_MEDIUM_8023LAN)
3617 || (intf->channels[chan].medium
3618 == IPMI_CHANNEL_MEDIUM_ASYNC))
3619 ipmi_inc_stat(intf, sent_lan_command_errs);
3621 ipmi_inc_stat(intf, sent_ipmb_command_errs);
3622 intf_err_seq(intf, msg->msgid, msg->rsp[2]);
3624 /* The message was sent, start the timer. */
3625 intf_start_seq_timer(intf, msg->msgid);
3627 ipmi_free_smi_msg(msg);
3632 * To preserve message order, if the list is not empty, we
3633 * tack this message onto the end of the list.
3635 run_to_completion = intf->run_to_completion;
3636 if (!run_to_completion)
3637 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3638 if (!list_empty(&intf->waiting_msgs)) {
3639 list_add_tail(&msg->link, &intf->waiting_msgs);
3640 if (!run_to_completion)
3641 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3644 if (!run_to_completion)
3645 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3647 rv = handle_new_recv_msg(intf, msg);
3650 * Could not handle the message now, just add it to a
3651 * list to handle later.
3653 run_to_completion = intf->run_to_completion;
3654 if (!run_to_completion)
3655 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3656 list_add_tail(&msg->link, &intf->waiting_msgs);
3657 if (!run_to_completion)
3658 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3659 } else if (rv == 0) {
3660 ipmi_free_smi_msg(msg);
3666 EXPORT_SYMBOL(ipmi_smi_msg_received);
3668 void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3673 list_for_each_entry_rcu(user, &intf->users, link) {
3674 if (!user->handler->ipmi_watchdog_pretimeout)
3677 user->handler->ipmi_watchdog_pretimeout(user->handler_data);
3681 EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
3683 static struct ipmi_smi_msg *
3684 smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3685 unsigned char seq, long seqid)
3687 struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
3690 * If we can't allocate the message, then just return, we
3691 * get 4 retries, so this should be ok.
3695 memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3696 smi_msg->data_size = recv_msg->msg.data_len;
3697 smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
3703 for (m = 0; m < smi_msg->data_size; m++)
3704 printk(" %2.2x", smi_msg->data[m]);
3711 static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3712 struct list_head *timeouts, long timeout_period,
3713 int slot, unsigned long *flags)
3715 struct ipmi_recv_msg *msg;
3716 struct ipmi_smi_handlers *handlers;
3718 if (intf->intf_num == -1)
3724 ent->timeout -= timeout_period;
3725 if (ent->timeout > 0)
3728 if (ent->retries_left == 0) {
3729 /* The message has used all its retries. */
3731 msg = ent->recv_msg;
3732 list_add_tail(&msg->link, timeouts);
3734 ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
3735 else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3736 ipmi_inc_stat(intf, timed_out_lan_commands);
3738 ipmi_inc_stat(intf, timed_out_ipmb_commands);
3740 struct ipmi_smi_msg *smi_msg;
3741 /* More retries, send again. */
3744 * Start with the max timer, set to normal timer after
3745 * the message is sent.
3747 ent->timeout = MAX_MSG_TIMEOUT;
3748 ent->retries_left--;
3749 if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
3750 ipmi_inc_stat(intf, retransmitted_lan_commands);
3752 ipmi_inc_stat(intf, retransmitted_ipmb_commands);
3754 smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3759 spin_unlock_irqrestore(&intf->seq_lock, *flags);
3762 * Send the new message. We send with a zero
3763 * priority. It timed out, I doubt time is that
3764 * critical now, and high priority messages are really
3765 * only for messages to the local MC, which don't get
3768 handlers = intf->handlers;
3770 intf->handlers->sender(intf->send_info,
3773 ipmi_free_smi_msg(smi_msg);
3775 spin_lock_irqsave(&intf->seq_lock, *flags);
3779 static void ipmi_timeout_handler(long timeout_period)
3782 struct list_head timeouts;
3783 struct ipmi_recv_msg *msg, *msg2;
3784 struct ipmi_smi_msg *smi_msg, *smi_msg2;
3785 unsigned long flags;
3789 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
3790 /* See if any waiting messages need to be processed. */
3791 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3792 list_for_each_entry_safe(smi_msg, smi_msg2,
3793 &intf->waiting_msgs, link) {
3794 if (!handle_new_recv_msg(intf, smi_msg)) {
3795 list_del(&smi_msg->link);
3796 ipmi_free_smi_msg(smi_msg);
3799 * To preserve message order, quit if we
3800 * can't handle a message.
3805 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3808 * Go through the seq table and find any messages that
3809 * have timed out, putting them in the timeouts
3812 INIT_LIST_HEAD(&timeouts);
3813 spin_lock_irqsave(&intf->seq_lock, flags);
3814 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
3815 check_msg_timeout(intf, &(intf->seq_table[i]),
3816 &timeouts, timeout_period, i,
3818 spin_unlock_irqrestore(&intf->seq_lock, flags);
3820 list_for_each_entry_safe(msg, msg2, &timeouts, link)
3821 deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
3824 * Maintenance mode handling. Check the timeout
3825 * optimistically before we claim the lock. It may
3826 * mean a timeout gets missed occasionally, but that
3827 * only means the timeout gets extended by one period
3828 * in that case. No big deal, and it avoids the lock
3831 if (intf->auto_maintenance_timeout > 0) {
3832 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
3833 if (intf->auto_maintenance_timeout > 0) {
3834 intf->auto_maintenance_timeout
3836 if (!intf->maintenance_mode
3837 && (intf->auto_maintenance_timeout <= 0)) {
3838 intf->maintenance_mode_enable = 0;
3839 maintenance_mode_update(intf);
3842 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
3849 static void ipmi_request_event(void)
3852 struct ipmi_smi_handlers *handlers;
3856 * Called from the timer, no need to check if handlers is
3859 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
3860 /* No event requests when in maintenance mode. */
3861 if (intf->maintenance_mode_enable)
3864 handlers = intf->handlers;
3866 handlers->request_events(intf->send_info);
3871 static struct timer_list ipmi_timer;
3873 /* Call every ~100 ms. */
3874 #define IPMI_TIMEOUT_TIME 100
3876 /* How many jiffies does it take to get to the timeout time. */
3877 #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
3880 * Request events from the queue every second (this is the number of
3881 * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
3882 * future, IPMI will add a way to know immediately if an event is in
3883 * the queue and this silliness can go away.
3885 #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
3887 static atomic_t stop_operation;
3888 static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3890 static void ipmi_timeout(unsigned long data)
3892 if (atomic_read(&stop_operation))
3896 if (ticks_to_req_ev == 0) {
3897 ipmi_request_event();
3898 ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
3901 ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
3903 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
3907 static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
3908 static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
3910 /* FIXME - convert these to slabs. */
3911 static void free_smi_msg(struct ipmi_smi_msg *msg)
3913 atomic_dec(&smi_msg_inuse_count);
3917 struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
3919 struct ipmi_smi_msg *rv;
3920 rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
3922 rv->done = free_smi_msg;
3923 rv->user_data = NULL;
3924 atomic_inc(&smi_msg_inuse_count);
3928 EXPORT_SYMBOL(ipmi_alloc_smi_msg);
3930 static void free_recv_msg(struct ipmi_recv_msg *msg)
3932 atomic_dec(&recv_msg_inuse_count);
3936 struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
3938 struct ipmi_recv_msg *rv;
3940 rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
3943 rv->done = free_recv_msg;
3944 atomic_inc(&recv_msg_inuse_count);
3949 void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
3952 kref_put(&msg->user->refcount, free_user);
3955 EXPORT_SYMBOL(ipmi_free_recv_msg);
3957 #ifdef CONFIG_IPMI_PANIC_EVENT
3959 static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
3963 static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
3967 #ifdef CONFIG_IPMI_PANIC_STRING
3968 static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
3970 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3971 && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
3972 && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
3973 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
3974 /* A get event receiver command, save it. */
3975 intf->event_receiver = msg->msg.data[1];
3976 intf->event_receiver_lun = msg->msg.data[2] & 0x3;
3980 static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
3982 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
3983 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
3984 && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
3985 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
3987 * A get device id command, save if we are an event
3988 * receiver or generator.
3990 intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
3991 intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
3996 static void send_panic_events(char *str)
3998 struct kernel_ipmi_msg msg;
4000 unsigned char data[16];
4001 struct ipmi_system_interface_addr *si;
4002 struct ipmi_addr addr;
4003 struct ipmi_smi_msg smi_msg;
4004 struct ipmi_recv_msg recv_msg;
4006 si = (struct ipmi_system_interface_addr *) &addr;
4007 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4008 si->channel = IPMI_BMC_CHANNEL;
4011 /* Fill in an event telling that we have failed. */
4012 msg.netfn = 0x04; /* Sensor or Event. */
4013 msg.cmd = 2; /* Platform event command. */
4016 data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
4017 data[1] = 0x03; /* This is for IPMI 1.0. */
4018 data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
4019 data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
4020 data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
4023 * Put a few breadcrumbs in. Hopefully later we can add more things
4024 * to make the panic events more useful.
4032 smi_msg.done = dummy_smi_done_handler;
4033 recv_msg.done = dummy_recv_done_handler;
4035 /* For every registered interface, send the event. */
4036 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4037 if (!intf->handlers)
4038 /* Interface is not ready. */
4041 intf->run_to_completion = 1;
4042 /* Send the event announcing the panic. */
4043 intf->handlers->set_run_to_completion(intf->send_info, 1);
4044 i_ipmi_request(NULL,
4053 intf->channels[0].address,
4054 intf->channels[0].lun,
4055 0, 1); /* Don't retry, and don't wait. */
4058 #ifdef CONFIG_IPMI_PANIC_STRING
4060 * On every interface, dump a bunch of OEM event holding the
4066 /* For every registered interface, send the event. */
4067 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4069 struct ipmi_ipmb_addr *ipmb;
4072 if (intf->intf_num == -1)
4073 /* Interface was not ready yet. */
4077 * intf_num is used as an marker to tell if the
4078 * interface is valid. Thus we need a read barrier to
4079 * make sure data fetched before checking intf_num
4085 * First job here is to figure out where to send the
4086 * OEM events. There's no way in IPMI to send OEM
4087 * events using an event send command, so we have to
4088 * find the SEL to put them in and stick them in
4092 /* Get capabilities from the get device id. */
4093 intf->local_sel_device = 0;
4094 intf->local_event_generator = 0;
4095 intf->event_receiver = 0;
4097 /* Request the device info from the local MC. */
4098 msg.netfn = IPMI_NETFN_APP_REQUEST;
4099 msg.cmd = IPMI_GET_DEVICE_ID_CMD;
4102 intf->null_user_handler = device_id_fetcher;
4103 i_ipmi_request(NULL,
4112 intf->channels[0].address,
4113 intf->channels[0].lun,
4114 0, 1); /* Don't retry, and don't wait. */
4116 if (intf->local_event_generator) {
4117 /* Request the event receiver from the local MC. */
4118 msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
4119 msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
4122 intf->null_user_handler = event_receiver_fetcher;
4123 i_ipmi_request(NULL,
4132 intf->channels[0].address,
4133 intf->channels[0].lun,
4134 0, 1); /* no retry, and no wait. */
4136 intf->null_user_handler = NULL;
4139 * Validate the event receiver. The low bit must not
4140 * be 1 (it must be a valid IPMB address), it cannot
4141 * be zero, and it must not be my address.
4143 if (((intf->event_receiver & 1) == 0)
4144 && (intf->event_receiver != 0)
4145 && (intf->event_receiver != intf->channels[0].address)) {
4147 * The event receiver is valid, send an IPMB
4150 ipmb = (struct ipmi_ipmb_addr *) &addr;
4151 ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
4152 ipmb->channel = 0; /* FIXME - is this right? */
4153 ipmb->lun = intf->event_receiver_lun;
4154 ipmb->slave_addr = intf->event_receiver;
4155 } else if (intf->local_sel_device) {
4157 * The event receiver was not valid (or was
4158 * me), but I am an SEL device, just dump it
4161 si = (struct ipmi_system_interface_addr *) &addr;
4162 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4163 si->channel = IPMI_BMC_CHANNEL;
4166 continue; /* No where to send the event. */
4168 msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
4169 msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
4175 int size = strlen(p);
4181 data[2] = 0xf0; /* OEM event without timestamp. */
4182 data[3] = intf->channels[0].address;
4183 data[4] = j++; /* sequence # */
4185 * Always give 11 bytes, so strncpy will fill
4186 * it with zeroes for me.
4188 strncpy(data+5, p, 11);
4191 i_ipmi_request(NULL,
4200 intf->channels[0].address,
4201 intf->channels[0].lun,
4202 0, 1); /* no retry, and no wait. */
4205 #endif /* CONFIG_IPMI_PANIC_STRING */
4207 #endif /* CONFIG_IPMI_PANIC_EVENT */
4209 static int has_panicked;
4211 static int panic_event(struct notifier_block *this,
4212 unsigned long event,
4221 /* For every registered interface, set it to run to completion. */
4222 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4223 if (!intf->handlers)
4224 /* Interface is not ready. */
4227 intf->run_to_completion = 1;
4228 intf->handlers->set_run_to_completion(intf->send_info, 1);
4231 #ifdef CONFIG_IPMI_PANIC_EVENT
4232 send_panic_events(ptr);
4238 static struct notifier_block panic_block = {
4239 .notifier_call = panic_event,
4241 .priority = 200 /* priority: INT_MAX >= x >= 0 */
4244 static int ipmi_init_msghandler(void)
4251 rv = driver_register(&ipmidriver);
4253 printk(KERN_ERR PFX "Could not register IPMI driver\n");
4257 printk(KERN_INFO "ipmi message handler version "
4258 IPMI_DRIVER_VERSION "\n");
4260 #ifdef CONFIG_PROC_FS
4261 proc_ipmi_root = proc_mkdir("ipmi", NULL);
4262 if (!proc_ipmi_root) {
4263 printk(KERN_ERR PFX "Unable to create IPMI proc dir");
4267 proc_ipmi_root->owner = THIS_MODULE;
4268 #endif /* CONFIG_PROC_FS */
4270 setup_timer(&ipmi_timer, ipmi_timeout, 0);
4271 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4273 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
4280 static __init int ipmi_init_msghandler_mod(void)
4282 ipmi_init_msghandler();
4286 static __exit void cleanup_ipmi(void)
4293 atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
4296 * This can't be called if any interfaces exist, so no worry
4297 * about shutting down the interfaces.
4301 * Tell the timer to stop, then wait for it to stop. This
4302 * avoids problems with race conditions removing the timer
4305 atomic_inc(&stop_operation);
4306 del_timer_sync(&ipmi_timer);
4308 #ifdef CONFIG_PROC_FS
4309 remove_proc_entry(proc_ipmi_root->name, NULL);
4310 #endif /* CONFIG_PROC_FS */
4312 driver_unregister(&ipmidriver);
4316 /* Check for buffer leaks. */
4317 count = atomic_read(&smi_msg_inuse_count);
4319 printk(KERN_WARNING PFX "SMI message count %d at exit\n",
4321 count = atomic_read(&recv_msg_inuse_count);
4323 printk(KERN_WARNING PFX "recv message count %d at exit\n",
4326 module_exit(cleanup_ipmi);
4328 module_init(ipmi_init_msghandler_mod);
4329 MODULE_LICENSE("GPL");
4330 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
4331 MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
4333 MODULE_VERSION(IPMI_DRIVER_VERSION);