projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ipmi: Fix handling of BMC flags
[deliverable/linux.git] / drivers / char / ipmi / ipmi_msghandler.c
CommitLineData
1da177e4
LT		 1/*
2 * ipmi_msghandler.c
3 *
4 * Incoming and outgoing message routing for an IPMI interface.
5 *
6 * Author: MontaVista Software, Inc.
7 * Corey Minyard <minyard@mvista.com>
8 * source@mvista.com
9 *
10 * Copyright 2002 MontaVista Software Inc.
11 *
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.
16 *
17 *
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.
28 *
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.
32 */
33
1da177e4
LT		 34#include <linux/module.h>
35#include <linux/errno.h>
1da177e4 36#include <linux/poll.h>
a99bbaf5 37#include <linux/sched.h>
07412736 38#include <linux/seq_file.h>
1da177e4 39#include <linux/spinlock.h>
d6dfd131 40#include <linux/mutex.h>
1da177e4
LT		 41#include <linux/slab.h>
42#include <linux/ipmi.h>
43#include <linux/ipmi_smi.h>
44#include <linux/notifier.h>
45#include <linux/init.h>
46#include <linux/proc_fs.h>
393d2cc3 47#include <linux/rcupdate.h>
7adf579c 48#include <linux/interrupt.h>
1da177e4
LT		 49
50#define PFX "IPMI message handler: "
1fdd75bd 51
f7caa1b5 52#define IPMI_DRIVER_VERSION "39.2"
1da177e4
LT		 53
54static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
55static int ipmi_init_msghandler(void);
7adf579c
CM		 56static void smi_recv_tasklet(unsigned long);
57static void handle_new_recv_msgs(ipmi_smi_t intf);
89986496 58static void need_waiter(ipmi_smi_t intf);
1da177e4 59
0c8204b3 60static int initialized;
1da177e4 61
3b625943 62#ifdef CONFIG_PROC_FS
0c8204b3 63static struct proc_dir_entry *proc_ipmi_root;
3b625943 64#endif /* CONFIG_PROC_FS */
1da177e4 65
b9675136
CM		 66/* Remain in auto-maintenance mode for this amount of time (in ms). */
67#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
68
1da177e4
LT		 69#define MAX_EVENTS_IN_QUEUE 25
70
c70d7499
CM		 71/*
72 * Don't let a message sit in a queue forever, always time it with at lest
73 * the max message timer. This is in milliseconds.
74 */
1da177e4
LT		 75#define MAX_MSG_TIMEOUT 60000
76
89986496
CM		 77/* Call every ~1000 ms. */
78#define IPMI_TIMEOUT_TIME 1000
79
80/* How many jiffies does it take to get to the timeout time. */
81#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
82
83/*
84 * Request events from the queue every second (this is the number of
85 * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
86 * future, IPMI will add a way to know immediately if an event is in
87 * the queue and this silliness can go away.
88 */
89#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
90
393d2cc3
CM		 91/*
92 * The main "user" data structure.
93 */
c70d7499 94struct ipmi_user {
1da177e4
LT		 95 struct list_head link;
96
7aefac26
CM		 97 /* Set to false when the user is destroyed. */
98 bool valid;
393d2cc3
CM		 99
100 struct kref refcount;
101
1da177e4
LT		 102 /* The upper layer that handles receive messages. */
103 struct ipmi_user_hndl *handler;
104 void *handler_data;
105
106 /* The interface this user is bound to. */
107 ipmi_smi_t intf;
108
109 /* Does this interface receive IPMI events? */
89986496 110 bool gets_events;
1da177e4
LT		 111};
112
c70d7499 113struct cmd_rcvr {
1da177e4
LT		 114 struct list_head link;
115
116 ipmi_user_t user;
117 unsigned char netfn;
118 unsigned char cmd;
c69c3127 119 unsigned int chans;
393d2cc3
CM		 120
121 /*
122 * This is used to form a linked lised during mass deletion.
123 * Since this is in an RCU list, we cannot use the link above
124 * or change any data until the RCU period completes. So we
125 * use this next variable during mass deletion so we can have
126 * a list and don't have to wait and restart the search on
c70d7499
CM		 127 * every individual deletion of a command.
128 */
393d2cc3 129 struct cmd_rcvr *next;
1da177e4
LT		 130};
131
c70d7499 132struct seq_table {
1da177e4
LT		 133 unsigned int inuse : 1;
134 unsigned int broadcast : 1;
135
136 unsigned long timeout;
137 unsigned long orig_timeout;
138 unsigned int retries_left;
139
c70d7499
CM		 140 /*
141 * To verify on an incoming send message response that this is
142 * the message that the response is for, we keep a sequence id
143 * and increment it every time we send a message.
144 */
1da177e4
LT		 145 long seqid;
146
c70d7499
CM		 147 /*
148 * This is held so we can properly respond to the message on a
149 * timeout, and it is used to hold the temporary data for
150 * retransmission, too.
151 */
1da177e4
LT		 152 struct ipmi_recv_msg *recv_msg;
153};
154
c70d7499
CM		 155/*
156 * Store the information in a msgid (long) to allow us to find a
157 * sequence table entry from the msgid.
158 */
1da177e4
LT		 159#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
160
161#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
162 do { \
163 seq = ((msgid >> 26) & 0x3f); \
164 seqid = (msgid & 0x3fffff); \
c70d7499 165 } while (0)
1da177e4
LT		 166
167#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
168
c70d7499 169struct ipmi_channel {
1da177e4
LT		 170 unsigned char medium;
171 unsigned char protocol;
c14979b9 172
c70d7499
CM		 173 /*
174 * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
175 * but may be changed by the user.
176 */
c14979b9
CM		 177 unsigned char address;
178
c70d7499
CM		 179 /*
180 * My LUN. This should generally stay the SMS LUN, but just in
181 * case...
182 */
c14979b9 183 unsigned char lun;
1da177e4
LT		 184};
185
3b625943 186#ifdef CONFIG_PROC_FS
c70d7499 187struct ipmi_proc_entry {
1da177e4
LT		 188 char *name;
189 struct ipmi_proc_entry *next;
190};
3b625943 191#endif
1da177e4 192
c70d7499 193struct bmc_device {
16639eb0 194 struct platform_device pdev;
50c812b2
CM		 195 struct ipmi_device_id id;
196 unsigned char guid[16];
197 int guid_set;
16639eb0
CM		 198 char name[16];
199 struct kref usecount;
50c812b2
CM		 200
201 /* bmc device attributes */
202 struct device_attribute device_id_attr;
203 struct device_attribute provides_dev_sdrs_attr;
204 struct device_attribute revision_attr;
205 struct device_attribute firmware_rev_attr;
206 struct device_attribute version_attr;
207 struct device_attribute add_dev_support_attr;
208 struct device_attribute manufacturer_id_attr;
209 struct device_attribute product_id_attr;
210 struct device_attribute guid_attr;
211 struct device_attribute aux_firmware_rev_attr;
212};
16639eb0 213#define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev)
50c812b2 214
b2655f26
KB		 215/*
216 * Various statistics for IPMI, these index stats[] in the ipmi_smi
217 * structure.
218 */
73f2bdb9
CM		 219enum ipmi_stat_indexes {
220 /* Commands we got from the user that were invalid. */
221 IPMI_STAT_sent_invalid_commands = 0,
b2655f26 222
73f2bdb9
CM		 223 /* Commands we sent to the MC. */
224 IPMI_STAT_sent_local_commands,
b2655f26 225
73f2bdb9
CM		 226 /* Responses from the MC that were delivered to a user. */
227 IPMI_STAT_handled_local_responses,
b2655f26 228
73f2bdb9
CM		 229 /* Responses from the MC that were not delivered to a user. */
230 IPMI_STAT_unhandled_local_responses,
b2655f26 231
73f2bdb9
CM		 232 /* Commands we sent out to the IPMB bus. */
233 IPMI_STAT_sent_ipmb_commands,
b2655f26 234
73f2bdb9
CM		 235 /* Commands sent on the IPMB that had errors on the SEND CMD */
236 IPMI_STAT_sent_ipmb_command_errs,
b2655f26 237
73f2bdb9
CM		 238 /* Each retransmit increments this count. */
239 IPMI_STAT_retransmitted_ipmb_commands,
b2655f26 240
73f2bdb9
CM		 241 /*
242 * When a message times out (runs out of retransmits) this is
243 * incremented.
244 */
245 IPMI_STAT_timed_out_ipmb_commands,
b2655f26 246
73f2bdb9
CM		 247 /*
248 * This is like above, but for broadcasts. Broadcasts are
249 * *not* included in the above count (they are expected to
250 * time out).
251 */
252 IPMI_STAT_timed_out_ipmb_broadcasts,
b2655f26 253
73f2bdb9
CM		 254 /* Responses I have sent to the IPMB bus. */
255 IPMI_STAT_sent_ipmb_responses,
b2655f26 256
73f2bdb9
CM		 257 /* The response was delivered to the user. */
258 IPMI_STAT_handled_ipmb_responses,
b2655f26 259
73f2bdb9
CM		 260 /* The response had invalid data in it. */
261 IPMI_STAT_invalid_ipmb_responses,
b2655f26 262
73f2bdb9
CM		 263 /* The response didn't have anyone waiting for it. */
264 IPMI_STAT_unhandled_ipmb_responses,
b2655f26 265
73f2bdb9
CM		 266 /* Commands we sent out to the IPMB bus. */
267 IPMI_STAT_sent_lan_commands,
b2655f26 268
73f2bdb9
CM		 269 /* Commands sent on the IPMB that had errors on the SEND CMD */
270 IPMI_STAT_sent_lan_command_errs,
b2655f26 271
73f2bdb9
CM		 272 /* Each retransmit increments this count. */
273 IPMI_STAT_retransmitted_lan_commands,
b2655f26 274
73f2bdb9
CM		 275 /*
276 * When a message times out (runs out of retransmits) this is
277 * incremented.
278 */
279 IPMI_STAT_timed_out_lan_commands,
280
281 /* Responses I have sent to the IPMB bus. */
282 IPMI_STAT_sent_lan_responses,
b2655f26 283
73f2bdb9
CM		 284 /* The response was delivered to the user. */
285 IPMI_STAT_handled_lan_responses,
b2655f26 286
73f2bdb9
CM		 287 /* The response had invalid data in it. */
288 IPMI_STAT_invalid_lan_responses,
b2655f26 289
73f2bdb9
CM		 290 /* The response didn't have anyone waiting for it. */
291 IPMI_STAT_unhandled_lan_responses,
b2655f26 292
73f2bdb9
CM		 293 /* The command was delivered to the user. */
294 IPMI_STAT_handled_commands,
b2655f26 295
73f2bdb9
CM		 296 /* The command had invalid data in it. */
297 IPMI_STAT_invalid_commands,
b2655f26 298
73f2bdb9
CM		 299 /* The command didn't have anyone waiting for it. */
300 IPMI_STAT_unhandled_commands,
b2655f26 301
73f2bdb9
CM		 302 /* Invalid data in an event. */
303 IPMI_STAT_invalid_events,
b2655f26 304
73f2bdb9
CM		 305 /* Events that were received with the proper format. */
306 IPMI_STAT_events,
b2655f26 307
25176ed6
CM		 308 /* Retransmissions on IPMB that failed. */
309 IPMI_STAT_dropped_rexmit_ipmb_commands,
310
311 /* Retransmissions on LAN that failed. */
312 IPMI_STAT_dropped_rexmit_lan_commands,
b2655f26 313
73f2bdb9
CM		 314 /* This *must* remain last, add new values above this. */
315 IPMI_NUM_STATS
316};
b2655f26
KB		 317
318
1da177e4 319#define IPMI_IPMB_NUM_SEQ 64
c14979b9 320#define IPMI_MAX_CHANNELS 16
c70d7499 321struct ipmi_smi {
1da177e4
LT		 322 /* What interface number are we? */
323 int intf_num;
324
393d2cc3
CM		 325 struct kref refcount;
326
bca0324d
CM		 327 /* Used for a list of interfaces. */
328 struct list_head link;
329
c70d7499
CM		 330 /*
331 * The list of upper layers that are using me. seq_lock
332 * protects this.
333 */
393d2cc3 334 struct list_head users;
1da177e4 335
b2c03941
CM		 336 /* Information to supply to users. */
337 unsigned char ipmi_version_major;
338 unsigned char ipmi_version_minor;
339
1da177e4
LT		 340 /* Used for wake ups at startup. */
341 wait_queue_head_t waitq;
342
50c812b2
CM		 343 struct bmc_device *bmc;
344 char *my_dev_name;
1da177e4 345
c70d7499
CM		 346 /*
347 * This is the lower-layer's sender routine. Note that you
b2c03941
CM		 348 * must either be holding the ipmi_interfaces_mutex or be in
349 * an umpreemptible region to use this. You must fetch the
c70d7499
CM		 350 * value into a local variable and make sure it is not NULL.
351 */
1da177e4
LT		 352 struct ipmi_smi_handlers *handlers;
353 void *send_info;
354
3b625943 355#ifdef CONFIG_PROC_FS
ac019151
CM		 356 /* A list of proc entries for this interface. */
357 struct mutex proc_entry_lock;
1da177e4 358 struct ipmi_proc_entry *proc_entries;
3b625943 359#endif
1da177e4 360
50c812b2
CM		 361 /* Driver-model device for the system interface. */
362 struct device *si_dev;
363
c70d7499
CM		 364 /*
365 * A table of sequence numbers for this interface. We use the
366 * sequence numbers for IPMB messages that go out of the
367 * interface to match them up with their responses. A routine
368 * is called periodically to time the items in this list.
369 */
1da177e4
LT		 370 spinlock_t seq_lock;
371 struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
372 int curr_seq;
373
c70d7499 374 /*
7adf579c
CM		 375 * Messages queued for delivery. If delivery fails (out of memory
376 * for instance), They will stay in here to be processed later in a
377 * periodic timer interrupt. The tasklet is for handling received
378 * messages directly from the handler.
c70d7499 379 */
1da177e4
LT		 380 spinlock_t waiting_msgs_lock;
381 struct list_head waiting_msgs;
7adf579c
CM		 382 atomic_t watchdog_pretimeouts_to_deliver;
383 struct tasklet_struct recv_tasklet;
1da177e4 384
c70d7499
CM		 385 /*
386 * The list of command receivers that are registered for commands
387 * on this interface.
388 */
d6dfd131 389 struct mutex cmd_rcvrs_mutex;
1da177e4
LT		 390 struct list_head cmd_rcvrs;
391
c70d7499
CM		 392 /*
393 * Events that were queues because no one was there to receive
394 * them.
395 */
1da177e4
LT		 396 spinlock_t events_lock; /* For dealing with event stuff. */
397 struct list_head waiting_events;
398 unsigned int waiting_events_count; /* How many events in queue? */
87ebd06f
CM		 399 char delivering_events;
400 char event_msg_printed;
89986496
CM		 401 atomic_t event_waiters;
402 unsigned int ticks_to_req_ev;
403 int last_needs_timer;
1da177e4 404
c70d7499
CM		 405 /*
406 * The event receiver for my BMC, only really used at panic
407 * shutdown as a place to store this.
408 */
1da177e4
LT		 409 unsigned char event_receiver;
410 unsigned char event_receiver_lun;
411 unsigned char local_sel_device;
412 unsigned char local_event_generator;
413
b9675136
CM		 414 /* For handling of maintenance mode. */
415 int maintenance_mode;
7aefac26 416 bool maintenance_mode_enable;
b9675136
CM		 417 int auto_maintenance_timeout;
418 spinlock_t maintenance_mode_lock; /* Used in a timer... */
419
c70d7499
CM		 420 /*
421 * A cheap hack, if this is non-null and a message to an
422 * interface comes in with a NULL user, call this routine with
423 * it. Note that the message will still be freed by the
424 * caller. This only works on the system interface.
425 */
56a55ec6 426 void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
1da177e4 427
c70d7499
CM		 428 /*
429 * When we are scanning the channels for an SMI, this will
430 * tell which channel we are scanning.
431 */
1da177e4
LT		 432 int curr_channel;
433
434 /* Channel information */
435 struct ipmi_channel channels[IPMI_MAX_CHANNELS];
436
437 /* Proc FS stuff. */
438 struct proc_dir_entry *proc_dir;
439 char proc_dir_name[10];
440
b2655f26 441 atomic_t stats[IPMI_NUM_STATS];
5956dce1
KB		 442
443 /*
444 * run_to_completion duplicate of smb_info, smi_info
445 * and ipmi_serial_info structures. Used to decrease numbers of
446 * parameters passed by "low" level IPMI code.
447 */
448 int run_to_completion;
1da177e4 449};
50c812b2 450#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
1da177e4 451
50c812b2
CM		 452/**
453 * The driver model view of the IPMI messaging driver.
454 */
fe2d5ffc
DW		 455static struct platform_driver ipmidriver = {
456 .driver = {
457 .name = "ipmi",
458 .bus = &platform_bus_type
459 }
50c812b2
CM		 460};
461static DEFINE_MUTEX(ipmidriver_mutex);
462
bed9759b 463static LIST_HEAD(ipmi_interfaces);
bca0324d 464static DEFINE_MUTEX(ipmi_interfaces_mutex);
1da177e4 465
c70d7499
CM		 466/*
467 * List of watchers that want to know when smi's are added and deleted.
468 */
bed9759b 469static LIST_HEAD(smi_watchers);
b2c03941 470static DEFINE_MUTEX(smi_watchers_mutex);
1da177e4 471
b2655f26
KB		 472#define ipmi_inc_stat(intf, stat) \
473 atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
474#define ipmi_get_stat(intf, stat) \
475 ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
476
7e50387b
CM		 477static char *addr_src_to_str[] = { "invalid", "hotmod", "hardcoded", "SPMI",
478 "ACPI", "SMBIOS", "PCI",
479 "device-tree", "default" };
480
481const char *ipmi_addr_src_to_str(enum ipmi_addr_src src)
482{
483 if (src > SI_DEFAULT)
484 src = 0; /* Invalid */
485 return addr_src_to_str[src];
486}
487EXPORT_SYMBOL(ipmi_addr_src_to_str);
488
25176ed6
CM		 489static int is_lan_addr(struct ipmi_addr *addr)
490{
491 return addr->addr_type == IPMI_LAN_ADDR_TYPE;
492}
493
494static int is_ipmb_addr(struct ipmi_addr *addr)
495{
496 return addr->addr_type == IPMI_IPMB_ADDR_TYPE;
497}
498
499static int is_ipmb_bcast_addr(struct ipmi_addr *addr)
500{
501 return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE;
502}
b2655f26 503
393d2cc3
CM		 504static void free_recv_msg_list(struct list_head *q)
505{
506 struct ipmi_recv_msg *msg, *msg2;
507
508 list_for_each_entry_safe(msg, msg2, q, link) {
509 list_del(&msg->link);
510 ipmi_free_recv_msg(msg);
511 }
512}
513
f3ce6a0e
CM		 514static void free_smi_msg_list(struct list_head *q)
515{
516 struct ipmi_smi_msg *msg, *msg2;
517
518 list_for_each_entry_safe(msg, msg2, q, link) {
519 list_del(&msg->link);
520 ipmi_free_smi_msg(msg);
521 }
522}
523
393d2cc3
CM		 524static void clean_up_interface_data(ipmi_smi_t intf)
525{
526 int i;
527 struct cmd_rcvr *rcvr, *rcvr2;
393d2cc3
CM		 528 struct list_head list;
529
7adf579c
CM		 530 tasklet_kill(&intf->recv_tasklet);
531
f3ce6a0e 532 free_smi_msg_list(&intf->waiting_msgs);
393d2cc3
CM		 533 free_recv_msg_list(&intf->waiting_events);
534
78ba2faf
CM		 535 /*
536 * Wholesale remove all the entries from the list in the
537 * interface and wait for RCU to know that none are in use.
538 */
d6dfd131 539 mutex_lock(&intf->cmd_rcvrs_mutex);
78ba2faf
CM		 540 INIT_LIST_HEAD(&list);
541 list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
d6dfd131 542 mutex_unlock(&intf->cmd_rcvrs_mutex);
393d2cc3
CM		 543
544 list_for_each_entry_safe(rcvr, rcvr2, &list, link)
545 kfree(rcvr);
546
547 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
548 if ((intf->seq_table[i].inuse)
c70d7499 549 && (intf->seq_table[i].recv_msg))
393d2cc3 550 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
393d2cc3
CM		 551 }
552}
553
554static void intf_free(struct kref *ref)
555{
556 ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
557
558 clean_up_interface_data(intf);
559 kfree(intf);
560}
561
bca0324d 562struct watcher_entry {
b2c03941
CM		 563 int intf_num;
564 ipmi_smi_t intf;
bca0324d 565 struct list_head link;
bca0324d
CM		 566};
567
1da177e4
LT		 568int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
569{
bca0324d 570 ipmi_smi_t intf;
e381d1c4 571 LIST_HEAD(to_deliver);
bca0324d
CM		 572 struct watcher_entry *e, *e2;
573
b2c03941
CM		 574 mutex_lock(&smi_watchers_mutex);
575
bca0324d
CM		 576 mutex_lock(&ipmi_interfaces_mutex);
577
b2c03941 578 /* Build a list of things to deliver. */
78ba2faf 579 list_for_each_entry(intf, &ipmi_interfaces, link) {
bca0324d
CM		 580 if (intf->intf_num == -1)
581 continue;
582 e = kmalloc(sizeof(*e), GFP_KERNEL);
583 if (!e)
584 goto out_err;
b2c03941
CM		 585 kref_get(&intf->refcount);
586 e->intf = intf;
bca0324d
CM		 587 e->intf_num = intf->intf_num;
588 list_add_tail(&e->link, &to_deliver);
589 }
1da177e4 590
b2c03941
CM		 591 /* We will succeed, so add it to the list. */
592 list_add(&watcher->link, &smi_watchers);
bca0324d
CM		 593
594 mutex_unlock(&ipmi_interfaces_mutex);
595
596 list_for_each_entry_safe(e, e2, &to_deliver, link) {
597 list_del(&e->link);
b2c03941
CM		 598 watcher->new_smi(e->intf_num, e->intf->si_dev);
599 kref_put(&e->intf->refcount, intf_free);
bca0324d 600 kfree(e);
1da177e4 601 }
bca0324d 602
b2c03941 603 mutex_unlock(&smi_watchers_mutex);
bca0324d 604
1da177e4 605 return 0;
bca0324d
CM		 606
607 out_err:
b2c03941
CM		 608 mutex_unlock(&ipmi_interfaces_mutex);
609 mutex_unlock(&smi_watchers_mutex);
bca0324d
CM		 610 list_for_each_entry_safe(e, e2, &to_deliver, link) {
611 list_del(&e->link);
b2c03941 612 kref_put(&e->intf->refcount, intf_free);
bca0324d
CM		 613 kfree(e);
614 }
615 return -ENOMEM;
1da177e4 616}
c70d7499 617EXPORT_SYMBOL(ipmi_smi_watcher_register);
1da177e4
LT		 618
619int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
620{
b2c03941 621 mutex_lock(&smi_watchers_mutex);
1da177e4 622 list_del(&(watcher->link));
b2c03941 623 mutex_unlock(&smi_watchers_mutex);
1da177e4
LT		 624 return 0;
625}
c70d7499 626EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
1da177e4 627
b2c03941
CM		 628/*
629 * Must be called with smi_watchers_mutex held.
630 */
1da177e4 631static void
50c812b2 632call_smi_watchers(int i, struct device *dev)
1da177e4
LT		 633{
634 struct ipmi_smi_watcher *w;
635
1da177e4
LT		 636 list_for_each_entry(w, &smi_watchers, link) {
637 if (try_module_get(w->owner)) {
50c812b2 638 w->new_smi(i, dev);
1da177e4
LT		 639 module_put(w->owner);
640 }
641 }
1da177e4
LT		 642}
643
644static int
645ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
646{
647 if (addr1->addr_type != addr2->addr_type)
648 return 0;
649
650 if (addr1->channel != addr2->channel)
651 return 0;
652
653 if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
654 struct ipmi_system_interface_addr *smi_addr1
655 = (struct ipmi_system_interface_addr *) addr1;
656 struct ipmi_system_interface_addr *smi_addr2
657 = (struct ipmi_system_interface_addr *) addr2;
658 return (smi_addr1->lun == smi_addr2->lun);
659 }
660
25176ed6 661 if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) {
1da177e4
LT		 662 struct ipmi_ipmb_addr *ipmb_addr1
663 = (struct ipmi_ipmb_addr *) addr1;
664 struct ipmi_ipmb_addr *ipmb_addr2
665 = (struct ipmi_ipmb_addr *) addr2;
666
667 return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
668 && (ipmb_addr1->lun == ipmb_addr2->lun));
669 }
670
25176ed6 671 if (is_lan_addr(addr1)) {
1da177e4
LT		 672 struct ipmi_lan_addr *lan_addr1
673 = (struct ipmi_lan_addr *) addr1;
674 struct ipmi_lan_addr *lan_addr2
675 = (struct ipmi_lan_addr *) addr2;
676
677 return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
678 && (lan_addr1->local_SWID == lan_addr2->local_SWID)
679 && (lan_addr1->session_handle
680 == lan_addr2->session_handle)
681 && (lan_addr1->lun == lan_addr2->lun));
682 }
683
684 return 1;
685}
686
687int ipmi_validate_addr(struct ipmi_addr *addr, int len)
688{
c70d7499 689 if (len < sizeof(struct ipmi_system_interface_addr))
1da177e4 690 return -EINVAL;
1da177e4
LT		 691
692 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
693 if (addr->channel != IPMI_BMC_CHANNEL)
694 return -EINVAL;
695 return 0;
696 }
697
698 if ((addr->channel == IPMI_BMC_CHANNEL)
12fc1d7b 699 || (addr->channel >= IPMI_MAX_CHANNELS)
1da177e4
LT		 700 || (addr->channel < 0))
701 return -EINVAL;
702
25176ed6 703 if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
c70d7499 704 if (len < sizeof(struct ipmi_ipmb_addr))
1da177e4 705 return -EINVAL;
1da177e4
LT		 706 return 0;
707 }
708
25176ed6 709 if (is_lan_addr(addr)) {
c70d7499 710 if (len < sizeof(struct ipmi_lan_addr))
1da177e4 711 return -EINVAL;
1da177e4
LT		 712 return 0;
713 }
714
715 return -EINVAL;
716}
c70d7499 717EXPORT_SYMBOL(ipmi_validate_addr);
1da177e4
LT		 718
719unsigned int ipmi_addr_length(int addr_type)
720{
721 if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
722 return sizeof(struct ipmi_system_interface_addr);
723
724 if ((addr_type == IPMI_IPMB_ADDR_TYPE)
c70d7499 725 || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
1da177e4 726 return sizeof(struct ipmi_ipmb_addr);
1da177e4
LT		 727
728 if (addr_type == IPMI_LAN_ADDR_TYPE)
729 return sizeof(struct ipmi_lan_addr);
730
731 return 0;
732}
c70d7499 733EXPORT_SYMBOL(ipmi_addr_length);
1da177e4
LT		 734
735static void deliver_response(struct ipmi_recv_msg *msg)
736{
8a3628d5 737 if (!msg->user) {
56a55ec6 738 ipmi_smi_t intf = msg->user_msg_data;
56a55ec6
CM		 739
740 /* Special handling for NULL users. */
741 if (intf->null_user_handler) {
742 intf->null_user_handler(intf, msg);
b2655f26 743 ipmi_inc_stat(intf, handled_local_responses);
56a55ec6
CM		 744 } else {
745 /* No handler, so give up. */
b2655f26 746 ipmi_inc_stat(intf, unhandled_local_responses);
56a55ec6
CM		 747 }
748 ipmi_free_recv_msg(msg);
749 } else {
393d2cc3
CM		 750 ipmi_user_t user = msg->user;
751 user->handler->ipmi_recv_hndl(msg, user->handler_data);
56a55ec6 752 }
1da177e4
LT		 753}
754
b2c03941
CM		 755static void
756deliver_err_response(struct ipmi_recv_msg *msg, int err)
757{
758 msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
759 msg->msg_data[0] = err;
760 msg->msg.netfn |= 1; /* Convert to a response. */
761 msg->msg.data_len = 1;
762 msg->msg.data = msg->msg_data;
763 deliver_response(msg);
764}
765
c70d7499
CM		 766/*
767 * Find the next sequence number not being used and add the given
768 * message with the given timeout to the sequence table. This must be
769 * called with the interface's seq_lock held.
770 */
1da177e4
LT		 771static int intf_next_seq(ipmi_smi_t intf,
772 struct ipmi_recv_msg *recv_msg,
773 unsigned long timeout,
774 int retries,
775 int broadcast,
776 unsigned char *seq,
777 long *seqid)
778{
779 int rv = 0;
780 unsigned int i;
781
c70d7499
CM		 782 for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
783 i = (i+1)%IPMI_IPMB_NUM_SEQ) {
8a3628d5 784 if (!intf->seq_table[i].inuse)
1da177e4
LT		 785 break;
786 }
787
8a3628d5 788 if (!intf->seq_table[i].inuse) {
1da177e4
LT		 789 intf->seq_table[i].recv_msg = recv_msg;
790
c70d7499
CM		 791 /*
792 * Start with the maximum timeout, when the send response
793 * comes in we will start the real timer.
794 */
1da177e4
LT		 795 intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
796 intf->seq_table[i].orig_timeout = timeout;
797 intf->seq_table[i].retries_left = retries;
798 intf->seq_table[i].broadcast = broadcast;
799 intf->seq_table[i].inuse = 1;
800 intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
801 *seq = i;
802 *seqid = intf->seq_table[i].seqid;
803 intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
89986496 804 need_waiter(intf);
1da177e4
LT		 805 } else {
806 rv = -EAGAIN;
807 }
c70d7499 808
1da177e4
LT		 809 return rv;
810}
811
c70d7499
CM		 812/*
813 * Return the receive message for the given sequence number and
814 * release the sequence number so it can be reused. Some other data
815 * is passed in to be sure the message matches up correctly (to help
816 * guard against message coming in after their timeout and the
817 * sequence number being reused).
818 */
1da177e4
LT		 819static int intf_find_seq(ipmi_smi_t intf,
820 unsigned char seq,
821 short channel,
822 unsigned char cmd,
823 unsigned char netfn,
824 struct ipmi_addr *addr,
825 struct ipmi_recv_msg **recv_msg)
826{
827 int rv = -ENODEV;
828 unsigned long flags;
829
830 if (seq >= IPMI_IPMB_NUM_SEQ)
831 return -EINVAL;
832
833 spin_lock_irqsave(&(intf->seq_lock), flags);
834 if (intf->seq_table[seq].inuse) {
835 struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
836
c70d7499
CM		 837 if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
838 && (msg->msg.netfn == netfn)
839 && (ipmi_addr_equal(addr, &(msg->addr)))) {
1da177e4
LT		 840 *recv_msg = msg;
841 intf->seq_table[seq].inuse = 0;
842 rv = 0;
843 }
844 }
845 spin_unlock_irqrestore(&(intf->seq_lock), flags);
846
847 return rv;
848}
849
850
851/* Start the timer for a specific sequence table entry. */
852static int intf_start_seq_timer(ipmi_smi_t intf,
853 long msgid)
854{
855 int rv = -ENODEV;
856 unsigned long flags;
857 unsigned char seq;
858 unsigned long seqid;
859
860
861 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
862
863 spin_lock_irqsave(&(intf->seq_lock), flags);
c70d7499
CM		 864 /*
865 * We do this verification because the user can be deleted
866 * while a message is outstanding.
867 */
1da177e4 868 if ((intf->seq_table[seq].inuse)
c70d7499 869 && (intf->seq_table[seq].seqid == seqid)) {
1da177e4
LT		 870 struct seq_table *ent = &(intf->seq_table[seq]);
871 ent->timeout = ent->orig_timeout;
872 rv = 0;
873 }
874 spin_unlock_irqrestore(&(intf->seq_lock), flags);
875
876 return rv;
877}
878
879/* Got an error for the send message for a specific sequence number. */
880static int intf_err_seq(ipmi_smi_t intf,
881 long msgid,
882 unsigned int err)
883{
884 int rv = -ENODEV;
885 unsigned long flags;
886 unsigned char seq;
887 unsigned long seqid;
888 struct ipmi_recv_msg *msg = NULL;
889
890
891 GET_SEQ_FROM_MSGID(msgid, seq, seqid);
892
893 spin_lock_irqsave(&(intf->seq_lock), flags);
c70d7499
CM		 894 /*
895 * We do this verification because the user can be deleted
896 * while a message is outstanding.
897 */
1da177e4 898 if ((intf->seq_table[seq].inuse)
c70d7499 899 && (intf->seq_table[seq].seqid == seqid)) {
1da177e4
LT		 900 struct seq_table *ent = &(intf->seq_table[seq]);
901
902 ent->inuse = 0;
903 msg = ent->recv_msg;
904 rv = 0;
905 }
906 spin_unlock_irqrestore(&(intf->seq_lock), flags);
907
b2c03941
CM		 908 if (msg)
909 deliver_err_response(msg, err);
1da177e4
LT		 910
911 return rv;
912}
913
914
915int ipmi_create_user(unsigned int if_num,
916 struct ipmi_user_hndl *handler,
917 void *handler_data,
918 ipmi_user_t *user)
919{
920 unsigned long flags;
921 ipmi_user_t new_user;
922 int rv = 0;
923 ipmi_smi_t intf;
924
c70d7499
CM		 925 /*
926 * There is no module usecount here, because it's not
927 * required. Since this can only be used by and called from
928 * other modules, they will implicitly use this module, and
929 * thus this can't be removed unless the other modules are
930 * removed.
931 */
1da177e4
LT		 932
933 if (handler == NULL)
934 return -EINVAL;
935
c70d7499
CM		 936 /*
937 * Make sure the driver is actually initialized, this handles
938 * problems with initialization order.
939 */
1da177e4
LT		 940 if (!initialized) {
941 rv = ipmi_init_msghandler();
942 if (rv)
943 return rv;
944
c70d7499
CM		 945 /*
946 * The init code doesn't return an error if it was turned
947 * off, but it won't initialize. Check that.
948 */
1da177e4
LT		 949 if (!initialized)
950 return -ENODEV;
951 }
952
953 new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
8a3628d5 954 if (!new_user)
1da177e4
LT		 955 return -ENOMEM;
956
b2c03941 957 mutex_lock(&ipmi_interfaces_mutex);
bca0324d
CM		 958 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
959 if (intf->intf_num == if_num)
960 goto found;
1da177e4 961 }
b2c03941 962 /* Not found, return an error */
bca0324d
CM		 963 rv = -EINVAL;
964 goto out_kfree;
1da177e4 965
bca0324d 966 found:
393d2cc3
CM		 967 /* Note that each existing user holds a refcount to the interface. */
968 kref_get(&intf->refcount);
1da177e4 969
393d2cc3 970 kref_init(&new_user->refcount);
1da177e4
LT		 971 new_user->handler = handler;
972 new_user->handler_data = handler_data;
973 new_user->intf = intf;
89986496 974 new_user->gets_events = false;
1da177e4
LT		 975
976 if (!try_module_get(intf->handlers->owner)) {
977 rv = -ENODEV;
5c98d29a 978 goto out_kref;
1da177e4
LT		 979 }
980
981 if (intf->handlers->inc_usecount) {
982 rv = intf->handlers->inc_usecount(intf->send_info);
983 if (rv) {
984 module_put(intf->handlers->owner);
5c98d29a 985 goto out_kref;
1da177e4
LT		 986 }
987 }
988
c70d7499
CM		 989 /*
990 * Hold the lock so intf->handlers is guaranteed to be good
991 * until now
992 */
b2c03941
CM		 993 mutex_unlock(&ipmi_interfaces_mutex);
994
7aefac26 995 new_user->valid = true;
393d2cc3
CM		 996 spin_lock_irqsave(&intf->seq_lock, flags);
997 list_add_rcu(&new_user->link, &intf->users);
998 spin_unlock_irqrestore(&intf->seq_lock, flags);
89986496
CM		 999 if (handler->ipmi_watchdog_pretimeout) {
1000 /* User wants pretimeouts, so make sure to watch for them. */
1001 if (atomic_inc_return(&intf->event_waiters) == 1)
1002 need_waiter(intf);
1003 }
393d2cc3
CM		 1004 *user = new_user;
1005 return 0;
1da177e4 1006
5c98d29a 1007out_kref:
393d2cc3 1008 kref_put(&intf->refcount, intf_free);
5c98d29a 1009out_kfree:
b2c03941 1010 mutex_unlock(&ipmi_interfaces_mutex);
5c98d29a 1011 kfree(new_user);
1da177e4
LT		 1012 return rv;
1013}
c70d7499 1014EXPORT_SYMBOL(ipmi_create_user);
1da177e4 1015
16f4232c
ZY		 1016int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data)
1017{
1018 int rv = 0;
1019 ipmi_smi_t intf;
1020 struct ipmi_smi_handlers *handlers;
1021
1022 mutex_lock(&ipmi_interfaces_mutex);
1023 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
1024 if (intf->intf_num == if_num)
1025 goto found;
1026 }
1027 /* Not found, return an error */
1028 rv = -EINVAL;
1029 mutex_unlock(&ipmi_interfaces_mutex);
1030 return rv;
1031
1032found:
1033 handlers = intf->handlers;
1034 rv = -ENOSYS;
1035 if (handlers->get_smi_info)
1036 rv = handlers->get_smi_info(intf->send_info, data);
1037 mutex_unlock(&ipmi_interfaces_mutex);
1038
1039 return rv;
1040}
1041EXPORT_SYMBOL(ipmi_get_smi_info);
1042
393d2cc3
CM		 1043static void free_user(struct kref *ref)
1044{
1045 ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
1046 kfree(user);
1047}
1048
1049int ipmi_destroy_user(ipmi_user_t user)
1da177e4 1050{
393d2cc3 1051 ipmi_smi_t intf = user->intf;
1da177e4
LT		 1052 int i;
1053 unsigned long flags;
393d2cc3 1054 struct cmd_rcvr *rcvr;
393d2cc3 1055 struct cmd_rcvr *rcvrs = NULL;
1da177e4 1056
7aefac26 1057 user->valid = false;
1da177e4 1058
89986496
CM		 1059 if (user->handler->ipmi_watchdog_pretimeout)
1060 atomic_dec(&intf->event_waiters);
1061
1062 if (user->gets_events)
1063 atomic_dec(&intf->event_waiters);
1064
393d2cc3
CM		 1065 /* Remove the user from the interface's sequence table. */
1066 spin_lock_irqsave(&intf->seq_lock, flags);
1067 list_del_rcu(&user->link);
1da177e4 1068
e8b33617 1069 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
393d2cc3 1070 if (intf->seq_table[i].inuse
c70d7499 1071 && (intf->seq_table[i].recv_msg->user == user)) {
393d2cc3 1072 intf->seq_table[i].inuse = 0;
b2c03941 1073 ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
1da177e4
LT		 1074 }
1075 }
393d2cc3
CM		 1076 spin_unlock_irqrestore(&intf->seq_lock, flags);
1077
1078 /*
1079 * Remove the user from the command receiver's table. First
1080 * we build a list of everything (not using the standard link,
1081 * since other things may be using it till we do
1082 * synchronize_rcu()) then free everything in that list.
1083 */
d6dfd131 1084 mutex_lock(&intf->cmd_rcvrs_mutex);
066bb8d0 1085 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1da177e4 1086 if (rcvr->user == user) {
393d2cc3
CM		 1087 list_del_rcu(&rcvr->link);
1088 rcvr->next = rcvrs;
1089 rcvrs = rcvr;
1da177e4
LT		 1090 }
1091 }
d6dfd131 1092 mutex_unlock(&intf->cmd_rcvrs_mutex);
393d2cc3
CM		 1093 synchronize_rcu();
1094 while (rcvrs) {
1095 rcvr = rcvrs;
1096 rcvrs = rcvr->next;
1097 kfree(rcvr);
1098 }
1da177e4 1099
b2c03941
CM		 1100 mutex_lock(&ipmi_interfaces_mutex);
1101 if (intf->handlers) {
1102 module_put(intf->handlers->owner);
1103 if (intf->handlers->dec_usecount)
1104 intf->handlers->dec_usecount(intf->send_info);
1105 }
1106 mutex_unlock(&ipmi_interfaces_mutex);
1da177e4 1107
393d2cc3 1108 kref_put(&intf->refcount, intf_free);
1da177e4 1109
393d2cc3 1110 kref_put(&user->refcount, free_user);
1da177e4 1111
8a3628d5 1112 return 0;
1da177e4 1113}
c70d7499 1114EXPORT_SYMBOL(ipmi_destroy_user);
1da177e4
LT		 1115
1116void ipmi_get_version(ipmi_user_t user,
1117 unsigned char *major,
1118 unsigned char *minor)
1119{
b2c03941
CM		 1120 *major = user->intf->ipmi_version_major;
1121 *minor = user->intf->ipmi_version_minor;
1da177e4 1122}
c70d7499 1123EXPORT_SYMBOL(ipmi_get_version);
1da177e4 1124
c14979b9
CM		 1125int ipmi_set_my_address(ipmi_user_t user,
1126 unsigned int channel,
1127 unsigned char address)
1da177e4 1128{
c14979b9
CM		 1129 if (channel >= IPMI_MAX_CHANNELS)
1130 return -EINVAL;
1131 user->intf->channels[channel].address = address;
1132 return 0;
1da177e4 1133}
c70d7499 1134EXPORT_SYMBOL(ipmi_set_my_address);
1da177e4 1135
c14979b9
CM		 1136int ipmi_get_my_address(ipmi_user_t user,
1137 unsigned int channel,
1138 unsigned char *address)
1da177e4 1139{
c14979b9
CM		 1140 if (channel >= IPMI_MAX_CHANNELS)
1141 return -EINVAL;
1142 *address = user->intf->channels[channel].address;
1143 return 0;
1da177e4 1144}
c70d7499 1145EXPORT_SYMBOL(ipmi_get_my_address);
1da177e4 1146
c14979b9
CM		 1147int ipmi_set_my_LUN(ipmi_user_t user,
1148 unsigned int channel,
1149 unsigned char LUN)
1da177e4 1150{
c14979b9
CM		 1151 if (channel >= IPMI_MAX_CHANNELS)
1152 return -EINVAL;
1153 user->intf->channels[channel].lun = LUN & 0x3;
1154 return 0;
1da177e4 1155}
c70d7499 1156EXPORT_SYMBOL(ipmi_set_my_LUN);
1da177e4 1157
c14979b9
CM		 1158int ipmi_get_my_LUN(ipmi_user_t user,
1159 unsigned int channel,
1160 unsigned char *address)
1da177e4 1161{
c14979b9
CM		 1162 if (channel >= IPMI_MAX_CHANNELS)
1163 return -EINVAL;
1164 *address = user->intf->channels[channel].lun;
1165 return 0;
1da177e4 1166}
c70d7499 1167EXPORT_SYMBOL(ipmi_get_my_LUN);
1da177e4 1168
b9675136
CM		 1169int ipmi_get_maintenance_mode(ipmi_user_t user)
1170{
1171 int mode;
1172 unsigned long flags;
1173
1174 spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
1175 mode = user->intf->maintenance_mode;
1176 spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
1177
1178 return mode;
1179}
1180EXPORT_SYMBOL(ipmi_get_maintenance_mode);
1181
1182static void maintenance_mode_update(ipmi_smi_t intf)
1183{
1184 if (intf->handlers->set_maintenance_mode)
1185 intf->handlers->set_maintenance_mode(
1186 intf->send_info, intf->maintenance_mode_enable);
1187}
1188
1189int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
1190{
1191 int rv = 0;
1192 unsigned long flags;
1193 ipmi_smi_t intf = user->intf;
1194
1195 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1196 if (intf->maintenance_mode != mode) {
1197 switch (mode) {
1198 case IPMI_MAINTENANCE_MODE_AUTO:
b9675136
CM		 1199 intf->maintenance_mode_enable
1200 = (intf->auto_maintenance_timeout > 0);
1201 break;
1202
1203 case IPMI_MAINTENANCE_MODE_OFF:
7aefac26 1204 intf->maintenance_mode_enable = false;
b9675136
CM		 1205 break;
1206
1207 case IPMI_MAINTENANCE_MODE_ON:
7aefac26 1208 intf->maintenance_mode_enable = true;
b9675136
CM		 1209 break;
1210
1211 default:
1212 rv = -EINVAL;
1213 goto out_unlock;
1214 }
7aefac26 1215 intf->maintenance_mode = mode;
b9675136
CM		 1216
1217 maintenance_mode_update(intf);
1218 }
1219 out_unlock:
1220 spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
1221
1222 return rv;
1223}
1224EXPORT_SYMBOL(ipmi_set_maintenance_mode);
1225
89986496 1226int ipmi_set_gets_events(ipmi_user_t user, bool val)
1da177e4 1227{
393d2cc3
CM		 1228 unsigned long flags;
1229 ipmi_smi_t intf = user->intf;
1230 struct ipmi_recv_msg *msg, *msg2;
1231 struct list_head msgs;
1da177e4 1232
393d2cc3
CM		 1233 INIT_LIST_HEAD(&msgs);
1234
1235 spin_lock_irqsave(&intf->events_lock, flags);
89986496
CM		 1236 if (user->gets_events == val)
1237 goto out;
1238
1da177e4
LT		 1239 user->gets_events = val;
1240
89986496
CM		 1241 if (val) {
1242 if (atomic_inc_return(&intf->event_waiters) == 1)
1243 need_waiter(intf);
1244 } else {
1245 atomic_dec(&intf->event_waiters);
1246 }
1247
b2c03941
CM		 1248 if (intf->delivering_events)
1249 /*
1250 * Another thread is delivering events for this, so
1251 * let it handle any new events.
1252 */
1253 goto out;
1254
1255 /* Deliver any queued events. */
1256 while (user->gets_events && !list_empty(&intf->waiting_events)) {
179e0917
AM		 1257 list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
1258 list_move_tail(&msg->link, &msgs);
4791c03d 1259 intf->waiting_events_count = 0;
87ebd06f
CM		 1260 if (intf->event_msg_printed) {
1261 printk(KERN_WARNING PFX "Event queue no longer"
1262 " full\n");
1263 intf->event_msg_printed = 0;
1264 }
393d2cc3 1265
b2c03941
CM		 1266 intf->delivering_events = 1;
1267 spin_unlock_irqrestore(&intf->events_lock, flags);
1268
1269 list_for_each_entry_safe(msg, msg2, &msgs, link) {
1270 msg->user = user;
1271 kref_get(&user->refcount);
1272 deliver_response(msg);
1273 }
1274
1275 spin_lock_irqsave(&intf->events_lock, flags);
1276 intf->delivering_events = 0;
393d2cc3
CM		 1277 }
1278
b2c03941 1279 out:
393d2cc3 1280 spin_unlock_irqrestore(&intf->events_lock, flags);
1da177e4
LT		 1281
1282 return 0;
1283}
c70d7499 1284EXPORT_SYMBOL(ipmi_set_gets_events);
1da177e4 1285
393d2cc3
CM		 1286static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
1287 unsigned char netfn,
c69c3127
CM		 1288 unsigned char cmd,
1289 unsigned char chan)
393d2cc3
CM		 1290{
1291 struct cmd_rcvr *rcvr;
1292
1293 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
c69c3127
CM		 1294 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1295 && (rcvr->chans & (1 << chan)))
393d2cc3
CM		 1296 return rcvr;
1297 }
1298 return NULL;
1299}
1300
c69c3127
CM		 1301static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
1302 unsigned char netfn,
1303 unsigned char cmd,
1304 unsigned int chans)
1305{
1306 struct cmd_rcvr *rcvr;
1307
1308 list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1309 if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1310 && (rcvr->chans & chans))
1311 return 0;
1312 }
1313 return 1;
1314}
1315
1da177e4
LT		 1316int ipmi_register_for_cmd(ipmi_user_t user,
1317 unsigned char netfn,
c69c3127
CM		 1318 unsigned char cmd,
1319 unsigned int chans)
1da177e4 1320{
393d2cc3
CM		 1321 ipmi_smi_t intf = user->intf;
1322 struct cmd_rcvr *rcvr;
393d2cc3 1323 int rv = 0;
1da177e4
LT		 1324
1325
1326 rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
8a3628d5 1327 if (!rcvr)
1da177e4 1328 return -ENOMEM;
393d2cc3
CM		 1329 rcvr->cmd = cmd;
1330 rcvr->netfn = netfn;
c69c3127 1331 rcvr->chans = chans;
393d2cc3 1332 rcvr->user = user;
1da177e4 1333
d6dfd131 1334 mutex_lock(&intf->cmd_rcvrs_mutex);
1da177e4 1335 /* Make sure the command/netfn is not already registered. */
c69c3127 1336 if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
393d2cc3
CM		 1337 rv = -EBUSY;
1338 goto out_unlock;
1da177e4 1339 }
877197ef 1340
89986496
CM		 1341 if (atomic_inc_return(&intf->event_waiters) == 1)
1342 need_waiter(intf);
1343
393d2cc3 1344 list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1da177e4 1345
393d2cc3 1346 out_unlock:
d6dfd131 1347 mutex_unlock(&intf->cmd_rcvrs_mutex);
1da177e4
LT		 1348 if (rv)
1349 kfree(rcvr);
1350
1351 return rv;
1352}
c70d7499 1353EXPORT_SYMBOL(ipmi_register_for_cmd);
1da177e4
LT		 1354
1355int ipmi_unregister_for_cmd(ipmi_user_t user,
1356 unsigned char netfn,
c69c3127
CM		 1357 unsigned char cmd,
1358 unsigned int chans)
1da177e4 1359{
393d2cc3
CM		 1360 ipmi_smi_t intf = user->intf;
1361 struct cmd_rcvr *rcvr;
c69c3127
CM		 1362 struct cmd_rcvr *rcvrs = NULL;
1363 int i, rv = -ENOENT;
1da177e4 1364
d6dfd131 1365 mutex_lock(&intf->cmd_rcvrs_mutex);
c69c3127
CM		 1366 for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
1367 if (((1 << i) & chans) == 0)
1368 continue;
1369 rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
1370 if (rcvr == NULL)
1371 continue;
1372 if (rcvr->user == user) {
1373 rv = 0;
1374 rcvr->chans &= ~chans;
1375 if (rcvr->chans == 0) {
1376 list_del_rcu(&rcvr->link);
1377 rcvr->next = rcvrs;
1378 rcvrs = rcvr;
1379 }
1380 }
1381 }
1382 mutex_unlock(&intf->cmd_rcvrs_mutex);
1383 synchronize_rcu();
1384 while (rcvrs) {
89986496 1385 atomic_dec(&intf->event_waiters);
c69c3127
CM		 1386 rcvr = rcvrs;
1387 rcvrs = rcvr->next;
393d2cc3 1388 kfree(rcvr);
1da177e4 1389 }
c69c3127 1390 return rv;
1da177e4 1391}
c70d7499 1392EXPORT_SYMBOL(ipmi_unregister_for_cmd);
1da177e4 1393
1da177e4
LT		 1394static unsigned char
1395ipmb_checksum(unsigned char *data, int size)
1396{
1397 unsigned char csum = 0;
c70d7499 1398
1da177e4
LT		 1399 for (; size > 0; size--, data++)
1400 csum += *data;
1401
1402 return -csum;
1403}
1404
1405static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1406 struct kernel_ipmi_msg *msg,
1407 struct ipmi_ipmb_addr *ipmb_addr,
1408 long msgid,
1409 unsigned char ipmb_seq,
1410 int broadcast,
1411 unsigned char source_address,
1412 unsigned char source_lun)
1413{
1414 int i = broadcast;
1415
1416 /* Format the IPMB header data. */
1417 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1418 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1419 smi_msg->data[2] = ipmb_addr->channel;
1420 if (broadcast)
1421 smi_msg->data[3] = 0;
1422 smi_msg->data[i+3] = ipmb_addr->slave_addr;
1423 smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1424 smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1425 smi_msg->data[i+6] = source_address;
1426 smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1427 smi_msg->data[i+8] = msg->cmd;
1428
1429 /* Now tack on the data to the message. */
1430 if (msg->data_len > 0)
1431 memcpy(&(smi_msg->data[i+9]), msg->data,
1432 msg->data_len);
1433 smi_msg->data_size = msg->data_len + 9;
1434
1435 /* Now calculate the checksum and tack it on. */
1436 smi_msg->data[i+smi_msg->data_size]
1437 = ipmb_checksum(&(smi_msg->data[i+6]),
1438 smi_msg->data_size-6);
1439
c70d7499
CM		 1440 /*
1441 * Add on the checksum size and the offset from the
1442 * broadcast.
1443 */
1da177e4
LT		 1444 smi_msg->data_size += 1 + i;
1445
1446 smi_msg->msgid = msgid;
1447}
1448
1449static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1450 struct kernel_ipmi_msg *msg,
1451 struct ipmi_lan_addr *lan_addr,
1452 long msgid,
1453 unsigned char ipmb_seq,
1454 unsigned char source_lun)
1455{
1456 /* Format the IPMB header data. */
1457 smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1458 smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1459 smi_msg->data[2] = lan_addr->channel;
1460 smi_msg->data[3] = lan_addr->session_handle;
1461 smi_msg->data[4] = lan_addr->remote_SWID;
1462 smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1463 smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1464 smi_msg->data[7] = lan_addr->local_SWID;
1465 smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1466 smi_msg->data[9] = msg->cmd;
1467
1468 /* Now tack on the data to the message. */
1469 if (msg->data_len > 0)
1470 memcpy(&(smi_msg->data[10]), msg->data,
1471 msg->data_len);
1472 smi_msg->data_size = msg->data_len + 10;
1473
1474 /* Now calculate the checksum and tack it on. */
1475 smi_msg->data[smi_msg->data_size]
1476 = ipmb_checksum(&(smi_msg->data[7]),
1477 smi_msg->data_size-7);
1478
c70d7499
CM		 1479 /*
1480 * Add on the checksum size and the offset from the
1481 * broadcast.
1482 */
1da177e4
LT		 1483 smi_msg->data_size += 1;
1484
1485 smi_msg->msgid = msgid;
1486}
1487
c70d7499
CM		 1488/*
1489 * Separate from ipmi_request so that the user does not have to be
1490 * supplied in certain circumstances (mainly at panic time). If
1491 * messages are supplied, they will be freed, even if an error
1492 * occurs.
1493 */
393d2cc3
CM		 1494static int i_ipmi_request(ipmi_user_t user,
1495 ipmi_smi_t intf,
1496 struct ipmi_addr *addr,
1497 long msgid,
1498 struct kernel_ipmi_msg *msg,
1499 void *user_msg_data,
1500 void *supplied_smi,
1501 struct ipmi_recv_msg *supplied_recv,
1502 int priority,
1503 unsigned char source_address,
1504 unsigned char source_lun,
1505 int retries,
1506 unsigned int retry_time_ms)
1da177e4 1507{
b2c03941
CM		 1508 int rv = 0;
1509 struct ipmi_smi_msg *smi_msg;
1510 struct ipmi_recv_msg *recv_msg;
1511 unsigned long flags;
1512 struct ipmi_smi_handlers *handlers;
1da177e4
LT		 1513
1514
c70d7499 1515 if (supplied_recv)
1da177e4 1516 recv_msg = supplied_recv;
c70d7499 1517 else {
1da177e4 1518 recv_msg = ipmi_alloc_recv_msg();
c70d7499 1519 if (recv_msg == NULL)
1da177e4 1520 return -ENOMEM;
1da177e4
LT		 1521 }
1522 recv_msg->user_msg_data = user_msg_data;
1523
c70d7499 1524 if (supplied_smi)
1da177e4 1525 smi_msg = (struct ipmi_smi_msg *) supplied_smi;
c70d7499 1526 else {
1da177e4
LT		 1527 smi_msg = ipmi_alloc_smi_msg();
1528 if (smi_msg == NULL) {
1529 ipmi_free_recv_msg(recv_msg);
1530 return -ENOMEM;
1531 }
1532 }
1533
b2c03941
CM		 1534 rcu_read_lock();
1535 handlers = intf->handlers;
1536 if (!handlers) {
1537 rv = -ENODEV;
1538 goto out_err;
1539 }
1540
1da177e4 1541 recv_msg->user = user;
393d2cc3
CM		 1542 if (user)
1543 kref_get(&user->refcount);
1da177e4 1544 recv_msg->msgid = msgid;
c70d7499
CM		 1545 /*
1546 * Store the message to send in the receive message so timeout
1547 * responses can get the proper response data.
1548 */
1da177e4
LT		 1549 recv_msg->msg = *msg;
1550
1551 if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1552 struct ipmi_system_interface_addr *smi_addr;
1553
1554 if (msg->netfn & 1) {
1555 /* Responses are not allowed to the SMI. */
1556 rv = -EINVAL;
1557 goto out_err;
1558 }
1559
1560 smi_addr = (struct ipmi_system_interface_addr *) addr;
1561 if (smi_addr->lun > 3) {
b2655f26 1562 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1563 rv = -EINVAL;
1564 goto out_err;
1565 }
1566
1567 memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1568
1569 if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1570 && ((msg->cmd == IPMI_SEND_MSG_CMD)
1571 || (msg->cmd == IPMI_GET_MSG_CMD)
c70d7499
CM		 1572 || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
1573 /*
1574 * We don't let the user do these, since we manage
1575 * the sequence numbers.
1576 */
b2655f26 1577 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1578 rv = -EINVAL;
1579 goto out_err;
1580 }
1581
b9675136
CM		 1582 if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
1583 && ((msg->cmd == IPMI_COLD_RESET_CMD)
1584 || (msg->cmd == IPMI_WARM_RESET_CMD)))
c70d7499 1585 || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
b9675136
CM		 1586 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1587 intf->auto_maintenance_timeout
1588 = IPMI_MAINTENANCE_MODE_TIMEOUT;
1589 if (!intf->maintenance_mode
c70d7499 1590 && !intf->maintenance_mode_enable) {
7aefac26 1591 intf->maintenance_mode_enable = true;
b9675136
CM		 1592 maintenance_mode_update(intf);
1593 }
1594 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
1595 flags);
1596 }
1597
1da177e4 1598 if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
b2655f26 1599 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1600 rv = -EMSGSIZE;
1601 goto out_err;
1602 }
1603
1604 smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1605 smi_msg->data[1] = msg->cmd;
1606 smi_msg->msgid = msgid;
1607 smi_msg->user_data = recv_msg;
1608 if (msg->data_len > 0)
1609 memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1610 smi_msg->data_size = msg->data_len + 2;
b2655f26 1611 ipmi_inc_stat(intf, sent_local_commands);
25176ed6 1612 } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
1da177e4
LT		 1613 struct ipmi_ipmb_addr *ipmb_addr;
1614 unsigned char ipmb_seq;
1615 long seqid;
1616 int broadcast = 0;
1617
9c101fd4 1618 if (addr->channel >= IPMI_MAX_CHANNELS) {
b2655f26 1619 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1620 rv = -EINVAL;
1621 goto out_err;
1622 }
1623
1624 if (intf->channels[addr->channel].medium
c70d7499 1625 != IPMI_CHANNEL_MEDIUM_IPMB) {
b2655f26 1626 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1627 rv = -EINVAL;
1628 goto out_err;
1629 }
1630
1631 if (retries < 0) {
1632 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1633 retries = 0; /* Don't retry broadcasts. */
1634 else
1635 retries = 4;
1636 }
1637 if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
c70d7499
CM		 1638 /*
1639 * Broadcasts add a zero at the beginning of the
1640 * message, but otherwise is the same as an IPMB
1641 * address.
1642 */
1da177e4
LT		 1643 addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1644 broadcast = 1;
1645 }
1646
1647
1648 /* Default to 1 second retries. */
1649 if (retry_time_ms == 0)
1650 retry_time_ms = 1000;
1651
c70d7499
CM		 1652 /*
1653 * 9 for the header and 1 for the checksum, plus
1654 * possibly one for the broadcast.
1655 */
1da177e4 1656 if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
b2655f26 1657 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1658 rv = -EMSGSIZE;
1659 goto out_err;
1660 }
1661
1662 ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1663 if (ipmb_addr->lun > 3) {
b2655f26 1664 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1665 rv = -EINVAL;
1666 goto out_err;
1667 }
1668
1669 memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1670
1671 if (recv_msg->msg.netfn & 0x1) {
c70d7499
CM		 1672 /*
1673 * It's a response, so use the user's sequence
1674 * from msgid.
1675 */
b2655f26 1676 ipmi_inc_stat(intf, sent_ipmb_responses);
1da177e4
LT		 1677 format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1678 msgid, broadcast,
1679 source_address, source_lun);
1680
c70d7499
CM		 1681 /*
1682 * Save the receive message so we can use it
1683 * to deliver the response.
1684 */
1da177e4
LT		 1685 smi_msg->user_data = recv_msg;
1686 } else {
1687 /* It's a command, so get a sequence for it. */
1688
1689 spin_lock_irqsave(&(intf->seq_lock), flags);
1690
c70d7499
CM		 1691 /*
1692 * Create a sequence number with a 1 second
1693 * timeout and 4 retries.
1694 */
1da177e4
LT		 1695 rv = intf_next_seq(intf,
1696 recv_msg,
1697 retry_time_ms,
1698 retries,
1699 broadcast,
1700 &ipmb_seq,
1701 &seqid);
1702 if (rv) {
c70d7499
CM		 1703 /*
1704 * We have used up all the sequence numbers,
1705 * probably, so abort.
1706 */
1da177e4
LT		 1707 spin_unlock_irqrestore(&(intf->seq_lock),
1708 flags);
1709 goto out_err;
1710 }
1711
25176ed6
CM		 1712 ipmi_inc_stat(intf, sent_ipmb_commands);
1713
c70d7499
CM		 1714 /*
1715 * Store the sequence number in the message,
1716 * so that when the send message response
1717 * comes back we can start the timer.
1718 */
1da177e4
LT		 1719 format_ipmb_msg(smi_msg, msg, ipmb_addr,
1720 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1721 ipmb_seq, broadcast,
1722 source_address, source_lun);
1723
c70d7499
CM		 1724 /*
1725 * Copy the message into the recv message data, so we
1726 * can retransmit it later if necessary.
1727 */
1da177e4
LT		 1728 memcpy(recv_msg->msg_data, smi_msg->data,
1729 smi_msg->data_size);
1730 recv_msg->msg.data = recv_msg->msg_data;
1731 recv_msg->msg.data_len = smi_msg->data_size;
1732
c70d7499
CM		 1733 /*
1734 * We don't unlock until here, because we need
1735 * to copy the completed message into the
1736 * recv_msg before we release the lock.
1737 * Otherwise, race conditions may bite us. I
1738 * know that's pretty paranoid, but I prefer
1739 * to be correct.
1740 */
1da177e4
LT		 1741 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1742 }
25176ed6 1743 } else if (is_lan_addr(addr)) {
1da177e4
LT		 1744 struct ipmi_lan_addr *lan_addr;
1745 unsigned char ipmb_seq;
1746 long seqid;
1747
12fc1d7b 1748 if (addr->channel >= IPMI_MAX_CHANNELS) {
b2655f26 1749 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1750 rv = -EINVAL;
1751 goto out_err;
1752 }
1753
1754 if ((intf->channels[addr->channel].medium
c70d7499 1755 != IPMI_CHANNEL_MEDIUM_8023LAN)
1da177e4 1756 && (intf->channels[addr->channel].medium
c70d7499 1757 != IPMI_CHANNEL_MEDIUM_ASYNC)) {
b2655f26 1758 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1759 rv = -EINVAL;
1760 goto out_err;
1761 }
1762
1763 retries = 4;
1764
1765 /* Default to 1 second retries. */
1766 if (retry_time_ms == 0)
1767 retry_time_ms = 1000;
1768
1769 /* 11 for the header and 1 for the checksum. */
1770 if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
b2655f26 1771 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1772 rv = -EMSGSIZE;
1773 goto out_err;
1774 }
1775
1776 lan_addr = (struct ipmi_lan_addr *) addr;
1777 if (lan_addr->lun > 3) {
b2655f26 1778 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1779 rv = -EINVAL;
1780 goto out_err;
1781 }
1782
1783 memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1784
1785 if (recv_msg->msg.netfn & 0x1) {
c70d7499
CM		 1786 /*
1787 * It's a response, so use the user's sequence
1788 * from msgid.
1789 */
b2655f26 1790 ipmi_inc_stat(intf, sent_lan_responses);
1da177e4
LT		 1791 format_lan_msg(smi_msg, msg, lan_addr, msgid,
1792 msgid, source_lun);
1793
c70d7499
CM		 1794 /*
1795 * Save the receive message so we can use it
1796 * to deliver the response.
1797 */
1da177e4
LT		 1798 smi_msg->user_data = recv_msg;
1799 } else {
1800 /* It's a command, so get a sequence for it. */
1801
1802 spin_lock_irqsave(&(intf->seq_lock), flags);
1803
c70d7499
CM		 1804 /*
1805 * Create a sequence number with a 1 second
1806 * timeout and 4 retries.
1807 */
1da177e4
LT		 1808 rv = intf_next_seq(intf,
1809 recv_msg,
1810 retry_time_ms,
1811 retries,
1812 0,
1813 &ipmb_seq,
1814 &seqid);
1815 if (rv) {
c70d7499
CM		 1816 /*
1817 * We have used up all the sequence numbers,
1818 * probably, so abort.
1819 */
1da177e4
LT		 1820 spin_unlock_irqrestore(&(intf->seq_lock),
1821 flags);
1822 goto out_err;
1823 }
1824
25176ed6
CM		 1825 ipmi_inc_stat(intf, sent_lan_commands);
1826
c70d7499
CM		 1827 /*
1828 * Store the sequence number in the message,
1829 * so that when the send message response
1830 * comes back we can start the timer.
1831 */
1da177e4
LT		 1832 format_lan_msg(smi_msg, msg, lan_addr,
1833 STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1834 ipmb_seq, source_lun);
1835
c70d7499
CM		 1836 /*
1837 * Copy the message into the recv message data, so we
1838 * can retransmit it later if necessary.
1839 */
1da177e4
LT		 1840 memcpy(recv_msg->msg_data, smi_msg->data,
1841 smi_msg->data_size);
1842 recv_msg->msg.data = recv_msg->msg_data;
1843 recv_msg->msg.data_len = smi_msg->data_size;
1844
c70d7499
CM		 1845 /*
1846 * We don't unlock until here, because we need
1847 * to copy the completed message into the
1848 * recv_msg before we release the lock.
1849 * Otherwise, race conditions may bite us. I
1850 * know that's pretty paranoid, but I prefer
1851 * to be correct.
1852 */
1da177e4
LT		 1853 spin_unlock_irqrestore(&(intf->seq_lock), flags);
1854 }
1855 } else {
1856 /* Unknown address type. */
b2655f26 1857 ipmi_inc_stat(intf, sent_invalid_commands);
1da177e4
LT		 1858 rv = -EINVAL;
1859 goto out_err;
1860 }
1861
1862#ifdef DEBUG_MSGING
1863 {
1864 int m;
e8b33617 1865 for (m = 0; m < smi_msg->data_size; m++)
1da177e4
LT		 1866 printk(" %2.2x", smi_msg->data[m]);
1867 printk("\n");
1868 }
1869#endif
b2c03941
CM		 1870
1871 handlers->sender(intf->send_info, smi_msg, priority);
1872 rcu_read_unlock();
1da177e4
LT		 1873
1874 return 0;
1875
1876 out_err:
b2c03941 1877 rcu_read_unlock();
1da177e4
LT		 1878 ipmi_free_smi_msg(smi_msg);
1879 ipmi_free_recv_msg(recv_msg);
1880 return rv;
1881}
1882
c14979b9
CM		 1883static int check_addr(ipmi_smi_t intf,
1884 struct ipmi_addr *addr,
1885 unsigned char *saddr,
1886 unsigned char *lun)
1887{
1888 if (addr->channel >= IPMI_MAX_CHANNELS)
1889 return -EINVAL;
1890 *lun = intf->channels[addr->channel].lun;
1891 *saddr = intf->channels[addr->channel].address;
1892 return 0;
1893}
1894
1da177e4
LT		 1895int ipmi_request_settime(ipmi_user_t user,
1896 struct ipmi_addr *addr,
1897 long msgid,
1898 struct kernel_ipmi_msg *msg,
1899 void *user_msg_data,
1900 int priority,
1901 int retries,
1902 unsigned int retry_time_ms)
1903{
f0ba9390 1904 unsigned char saddr = 0, lun = 0;
c14979b9
CM		 1905 int rv;
1906
8a3628d5 1907 if (!user)
56a55ec6 1908 return -EINVAL;
c14979b9
CM		 1909 rv = check_addr(user->intf, addr, &saddr, &lun);
1910 if (rv)
1911 return rv;
1da177e4
LT		 1912 return i_ipmi_request(user,
1913 user->intf,
1914 addr,
1915 msgid,
1916 msg,
1917 user_msg_data,
1918 NULL, NULL,
1919 priority,
c14979b9
CM		 1920 saddr,
1921 lun,
1da177e4
LT		 1922 retries,
1923 retry_time_ms);
1924}
c70d7499 1925EXPORT_SYMBOL(ipmi_request_settime);
1da177e4
LT		 1926
1927int ipmi_request_supply_msgs(ipmi_user_t user,
1928 struct ipmi_addr *addr,
1929 long msgid,
1930 struct kernel_ipmi_msg *msg,
1931 void *user_msg_data,
1932 void *supplied_smi,
1933 struct ipmi_recv_msg *supplied_recv,
1934 int priority)
1935{
9ebca93b 1936 unsigned char saddr = 0, lun = 0;
c14979b9
CM		 1937 int rv;
1938
8a3628d5 1939 if (!user)
56a55ec6 1940 return -EINVAL;
c14979b9
CM		 1941 rv = check_addr(user->intf, addr, &saddr, &lun);
1942 if (rv)
1943 return rv;
1da177e4
LT		 1944 return i_ipmi_request(user,
1945 user->intf,
1946 addr,
1947 msgid,
1948 msg,
1949 user_msg_data,
1950 supplied_smi,
1951 supplied_recv,
1952 priority,
c14979b9
CM		 1953 saddr,
1954 lun,
1da177e4
LT		 1955 -1, 0);
1956}
c70d7499 1957EXPORT_SYMBOL(ipmi_request_supply_msgs);
1da177e4 1958
1aa16eea 1959#ifdef CONFIG_PROC_FS
07412736 1960static int smi_ipmb_proc_show(struct seq_file *m, void *v)
1da177e4 1961{
07412736 1962 ipmi_smi_t intf = m->private;
c14979b9 1963 int i;
1da177e4 1964
07412736
AD		 1965 seq_printf(m, "%x", intf->channels[0].address);
1966 for (i = 1; i < IPMI_MAX_CHANNELS; i++)
1967 seq_printf(m, " %x", intf->channels[i].address);
1968 return seq_putc(m, '\n');
1da177e4
LT		 1969}
1970
07412736 1971static int smi_ipmb_proc_open(struct inode *inode, struct file *file)
1da177e4 1972{
d9dda78b 1973 return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode));
07412736 1974}
1da177e4 1975
07412736
AD		 1976static const struct file_operations smi_ipmb_proc_ops = {
1977 .open = smi_ipmb_proc_open,
1978 .read = seq_read,
1979 .llseek = seq_lseek,
1980 .release = single_release,
1981};
1982
1983static int smi_version_proc_show(struct seq_file *m, void *v)
1984{
1985 ipmi_smi_t intf = m->private;
1986
1987 return seq_printf(m, "%u.%u\n",
50c812b2
CM		 1988 ipmi_version_major(&intf->bmc->id),
1989 ipmi_version_minor(&intf->bmc->id));
1da177e4
LT		 1990}
1991
07412736 1992static int smi_version_proc_open(struct inode *inode, struct file *file)
1da177e4 1993{
d9dda78b 1994 return single_open(file, smi_version_proc_show, PDE_DATA(inode));
07412736
AD		 1995}
1996
1997static const struct file_operations smi_version_proc_ops = {
1998 .open = smi_version_proc_open,
1999 .read = seq_read,
2000 .llseek = seq_lseek,
2001 .release = single_release,
2002};
1da177e4 2003
07412736
AD		 2004static int smi_stats_proc_show(struct seq_file *m, void *v)
2005{
2006 ipmi_smi_t intf = m->private;
2007
2008 seq_printf(m, "sent_invalid_commands: %u\n",
b2655f26 2009 ipmi_get_stat(intf, sent_invalid_commands));
07412736 2010 seq_printf(m, "sent_local_commands: %u\n",
b2655f26 2011 ipmi_get_stat(intf, sent_local_commands));
07412736 2012 seq_printf(m, "handled_local_responses: %u\n",
b2655f26 2013 ipmi_get_stat(intf, handled_local_responses));
07412736 2014 seq_printf(m, "unhandled_local_responses: %u\n",
b2655f26 2015 ipmi_get_stat(intf, unhandled_local_responses));
07412736 2016 seq_printf(m, "sent_ipmb_commands: %u\n",
b2655f26 2017 ipmi_get_stat(intf, sent_ipmb_commands));
07412736 2018 seq_printf(m, "sent_ipmb_command_errs: %u\n",
b2655f26 2019 ipmi_get_stat(intf, sent_ipmb_command_errs));
07412736 2020 seq_printf(m, "retransmitted_ipmb_commands: %u\n",
b2655f26 2021 ipmi_get_stat(intf, retransmitted_ipmb_commands));
07412736 2022 seq_printf(m, "timed_out_ipmb_commands: %u\n",
b2655f26 2023 ipmi_get_stat(intf, timed_out_ipmb_commands));
07412736 2024 seq_printf(m, "timed_out_ipmb_broadcasts: %u\n",
b2655f26 2025 ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
07412736 2026 seq_printf(m, "sent_ipmb_responses: %u\n",
b2655f26 2027 ipmi_get_stat(intf, sent_ipmb_responses));
07412736 2028 seq_printf(m, "handled_ipmb_responses: %u\n",
b2655f26 2029 ipmi_get_stat(intf, handled_ipmb_responses));
07412736 2030 seq_printf(m, "invalid_ipmb_responses: %u\n",
b2655f26 2031 ipmi_get_stat(intf, invalid_ipmb_responses));
07412736 2032 seq_printf(m, "unhandled_ipmb_responses: %u\n",
b2655f26 2033 ipmi_get_stat(intf, unhandled_ipmb_responses));
07412736 2034 seq_printf(m, "sent_lan_commands: %u\n",
b2655f26 2035 ipmi_get_stat(intf, sent_lan_commands));
07412736 2036 seq_printf(m, "sent_lan_command_errs: %u\n",
b2655f26 2037 ipmi_get_stat(intf, sent_lan_command_errs));
07412736 2038 seq_printf(m, "retransmitted_lan_commands: %u\n",
b2655f26 2039 ipmi_get_stat(intf, retransmitted_lan_commands));
07412736 2040 seq_printf(m, "timed_out_lan_commands: %u\n",
b2655f26 2041 ipmi_get_stat(intf, timed_out_lan_commands));
07412736 2042 seq_printf(m, "sent_lan_responses: %u\n",
b2655f26 2043 ipmi_get_stat(intf, sent_lan_responses));
07412736 2044 seq_printf(m, "handled_lan_responses: %u\n",
b2655f26 2045 ipmi_get_stat(intf, handled_lan_responses));
07412736 2046 seq_printf(m, "invalid_lan_responses: %u\n",
b2655f26 2047 ipmi_get_stat(intf, invalid_lan_responses));
07412736 2048 seq_printf(m, "unhandled_lan_responses: %u\n",
b2655f26 2049 ipmi_get_stat(intf, unhandled_lan_responses));
07412736 2050 seq_printf(m, "handled_commands: %u\n",
b2655f26 2051 ipmi_get_stat(intf, handled_commands));
07412736 2052 seq_printf(m, "invalid_commands: %u\n",
b2655f26 2053 ipmi_get_stat(intf, invalid_commands));
07412736 2054 seq_printf(m, "unhandled_commands: %u\n",
b2655f26 2055 ipmi_get_stat(intf, unhandled_commands));
07412736 2056 seq_printf(m, "invalid_events: %u\n",
b2655f26 2057 ipmi_get_stat(intf, invalid_events));
07412736 2058 seq_printf(m, "events: %u\n",
b2655f26 2059 ipmi_get_stat(intf, events));
07412736 2060 seq_printf(m, "failed rexmit LAN msgs: %u\n",
25176ed6 2061 ipmi_get_stat(intf, dropped_rexmit_lan_commands));
07412736 2062 seq_printf(m, "failed rexmit IPMB msgs: %u\n",
25176ed6 2063 ipmi_get_stat(intf, dropped_rexmit_ipmb_commands));
07412736
AD		 2064 return 0;
2065}
1da177e4 2066
07412736
AD		 2067static int smi_stats_proc_open(struct inode *inode, struct file *file)
2068{
d9dda78b 2069 return single_open(file, smi_stats_proc_show, PDE_DATA(inode));
1da177e4 2070}
07412736
AD		 2071
2072static const struct file_operations smi_stats_proc_ops = {
2073 .open = smi_stats_proc_open,
2074 .read = seq_read,
2075 .llseek = seq_lseek,
2076 .release = single_release,
2077};
1aa16eea 2078#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2079
2080int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
07412736 2081 const struct file_operations *proc_ops,
99b76233 2082 void *data)
1da177e4 2083{
1da177e4 2084 int rv = 0;
3b625943
CM		 2085#ifdef CONFIG_PROC_FS
2086 struct proc_dir_entry *file;
1da177e4
LT		 2087 struct ipmi_proc_entry *entry;
2088
2089 /* Create a list element. */
2090 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
2091 if (!entry)
2092 return -ENOMEM;
1b6b698f 2093 entry->name = kstrdup(name, GFP_KERNEL);
1da177e4
LT		 2094 if (!entry->name) {
2095 kfree(entry);
2096 return -ENOMEM;
2097 }
1da177e4 2098
07412736 2099 file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data);
1da177e4
LT		 2100 if (!file) {
2101 kfree(entry->name);
2102 kfree(entry);
2103 rv = -ENOMEM;
2104 } else {
ac019151 2105 mutex_lock(&smi->proc_entry_lock);
1da177e4
LT		 2106 /* Stick it on the list. */
2107 entry->next = smi->proc_entries;
2108 smi->proc_entries = entry;
ac019151 2109 mutex_unlock(&smi->proc_entry_lock);
1da177e4 2110 }
3b625943 2111#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2112
2113 return rv;
2114}
c70d7499 2115EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
1da177e4
LT		 2116
2117static int add_proc_entries(ipmi_smi_t smi, int num)
2118{
2119 int rv = 0;
2120
3b625943 2121#ifdef CONFIG_PROC_FS
1da177e4
LT		 2122 sprintf(smi->proc_dir_name, "%d", num);
2123 smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
2124 if (!smi->proc_dir)
2125 rv = -ENOMEM;
1da177e4
LT		 2126
2127 if (rv == 0)
2128 rv = ipmi_smi_add_proc_entry(smi, "stats",
07412736 2129 &smi_stats_proc_ops,
99b76233 2130 smi);
1da177e4
LT		 2131
2132 if (rv == 0)
2133 rv = ipmi_smi_add_proc_entry(smi, "ipmb",
07412736 2134 &smi_ipmb_proc_ops,
99b76233 2135 smi);
1da177e4
LT		 2136
2137 if (rv == 0)
2138 rv = ipmi_smi_add_proc_entry(smi, "version",
07412736 2139 &smi_version_proc_ops,
99b76233 2140 smi);
3b625943 2141#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2142
2143 return rv;
2144}
2145
2146static void remove_proc_entries(ipmi_smi_t smi)
2147{
3b625943 2148#ifdef CONFIG_PROC_FS
1da177e4
LT		 2149 struct ipmi_proc_entry *entry;
2150
ac019151 2151 mutex_lock(&smi->proc_entry_lock);
1da177e4
LT		 2152 while (smi->proc_entries) {
2153 entry = smi->proc_entries;
2154 smi->proc_entries = entry->next;
2155
2156 remove_proc_entry(entry->name, smi->proc_dir);
2157 kfree(entry->name);
2158 kfree(entry);
2159 }
ac019151 2160 mutex_unlock(&smi->proc_entry_lock);
1da177e4 2161 remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
3b625943 2162#endif /* CONFIG_PROC_FS */
1da177e4
LT		 2163}
2164
50c812b2
CM		 2165static int __find_bmc_guid(struct device *dev, void *data)
2166{
2167 unsigned char *id = data;
16639eb0 2168 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2169 return memcmp(bmc->guid, id, 16) == 0;
2170}
2171
2172static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
2173 unsigned char *guid)
2174{
2175 struct device *dev;
2176
2177 dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
2178 if (dev)
16639eb0 2179 return to_bmc_device(dev);
50c812b2
CM		 2180 else
2181 return NULL;
2182}
2183
2184struct prod_dev_id {
2185 unsigned int product_id;
2186 unsigned char device_id;
2187};
2188
2189static int __find_bmc_prod_dev_id(struct device *dev, void *data)
2190{
2191 struct prod_dev_id *id = data;
16639eb0 2192 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2193
2194 return (bmc->id.product_id == id->product_id
50c812b2
CM		 2195 && bmc->id.device_id == id->device_id);
2196}
2197
2198static struct bmc_device *ipmi_find_bmc_prod_dev_id(
2199 struct device_driver *drv,
f0b55da0 2200 unsigned int product_id, unsigned char device_id)
50c812b2
CM		 2201{
2202 struct prod_dev_id id = {
2203 .product_id = product_id,
2204 .device_id = device_id,
2205 };
2206 struct device *dev;
2207
2208 dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
2209 if (dev)
16639eb0 2210 return to_bmc_device(dev);
50c812b2
CM		 2211 else
2212 return NULL;
2213}
2214
2215static ssize_t device_id_show(struct device *dev,
2216 struct device_attribute *attr,
2217 char *buf)
2218{
16639eb0 2219 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2220
2221 return snprintf(buf, 10, "%u\n", bmc->id.device_id);
2222}
16639eb0 2223DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL);
50c812b2 2224
16639eb0
CM		 2225static ssize_t provides_device_sdrs_show(struct device *dev,
2226 struct device_attribute *attr,
2227 char *buf)
50c812b2 2228{
16639eb0 2229 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2230
2231 return snprintf(buf, 10, "%u\n",
7947d2cc 2232 (bmc->id.device_revision & 0x80) >> 7);
50c812b2 2233}
16639eb0 2234DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, NULL);
50c812b2
CM		 2235
2236static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
2237 char *buf)
2238{
16639eb0 2239 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2240
2241 return snprintf(buf, 20, "%u\n",
7947d2cc 2242 bmc->id.device_revision & 0x0F);
50c812b2 2243}
16639eb0 2244DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL);
50c812b2 2245
16639eb0
CM		 2246static ssize_t firmware_revision_show(struct device *dev,
2247 struct device_attribute *attr,
2248 char *buf)
50c812b2 2249{
16639eb0 2250 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2251
2252 return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
2253 bmc->id.firmware_revision_2);
2254}
16639eb0 2255DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL);
50c812b2
CM		 2256
2257static ssize_t ipmi_version_show(struct device *dev,
2258 struct device_attribute *attr,
2259 char *buf)
2260{
16639eb0 2261 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2262
2263 return snprintf(buf, 20, "%u.%u\n",
2264 ipmi_version_major(&bmc->id),
2265 ipmi_version_minor(&bmc->id));
2266}
16639eb0 2267DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL);
50c812b2
CM		 2268
2269static ssize_t add_dev_support_show(struct device *dev,
2270 struct device_attribute *attr,
2271 char *buf)
2272{
16639eb0 2273 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2274
2275 return snprintf(buf, 10, "0x%02x\n",
2276 bmc->id.additional_device_support);
2277}
16639eb0 2278DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, NULL);
50c812b2
CM		 2279
2280static ssize_t manufacturer_id_show(struct device *dev,
2281 struct device_attribute *attr,
2282 char *buf)
2283{
16639eb0 2284 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2285
2286 return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
2287}
16639eb0 2288DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL);
50c812b2
CM		 2289
2290static ssize_t product_id_show(struct device *dev,
2291 struct device_attribute *attr,
2292 char *buf)
2293{
16639eb0 2294 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2295
2296 return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
2297}
16639eb0 2298DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL);
50c812b2
CM		 2299
2300static ssize_t aux_firmware_rev_show(struct device *dev,
2301 struct device_attribute *attr,
2302 char *buf)
2303{
16639eb0 2304 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2305
2306 return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2307 bmc->id.aux_firmware_revision[3],
2308 bmc->id.aux_firmware_revision[2],
2309 bmc->id.aux_firmware_revision[1],
2310 bmc->id.aux_firmware_revision[0]);
2311}
16639eb0 2312DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL);
50c812b2
CM		 2313
2314static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
2315 char *buf)
2316{
16639eb0 2317 struct bmc_device *bmc = to_bmc_device(dev);
50c812b2
CM		 2318
2319 return snprintf(buf, 100, "%Lx%Lx\n",
2320 (long long) bmc->guid[0],
2321 (long long) bmc->guid[8]);
2322}
16639eb0
CM		 2323DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL);
2324
2325static struct attribute *bmc_dev_attrs[] = {
2326 &dev_attr_device_id.attr,
2327 &dev_attr_provides_device_sdrs.attr,
2328 &dev_attr_revision.attr,
2329 &dev_attr_firmware_revision.attr,
2330 &dev_attr_ipmi_version.attr,
2331 &dev_attr_additional_device_support.attr,
2332 &dev_attr_manufacturer_id.attr,
2333 &dev_attr_product_id.attr,
2334 NULL
2335};
50c812b2 2336
16639eb0
CM		 2337static struct attribute_group bmc_dev_attr_group = {
2338 .attrs = bmc_dev_attrs,
2339};
5e59393e 2340
16639eb0
CM		 2341static const struct attribute_group *bmc_dev_attr_groups[] = {
2342 &bmc_dev_attr_group,
2343 NULL
2344};
2345
2346static struct device_type bmc_device_type = {
2347 .groups = bmc_dev_attr_groups,
2348};
2349
2350static void
2351release_bmc_device(struct device *dev)
2352{
2353 kfree(to_bmc_device(dev));
5e59393e
JG		 2354}
2355
2356static void
2357cleanup_bmc_device(struct kref *ref)
2358{
16639eb0 2359 struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount);
5e59393e 2360
16639eb0
CM		 2361 if (bmc->id.aux_firmware_revision_set)
2362 device_remove_file(&bmc->pdev.dev,
2363 &bmc->aux_firmware_rev_attr);
2364 if (bmc->guid_set)
2365 device_remove_file(&bmc->pdev.dev,
2366 &bmc->guid_attr);
5e59393e 2367
16639eb0 2368 platform_device_unregister(&bmc->pdev);
50c812b2
CM		 2369}
2370
2371static void ipmi_bmc_unregister(ipmi_smi_t intf)
2372{
2373 struct bmc_device *bmc = intf->bmc;
2374
5a0e10ec 2375 sysfs_remove_link(&intf->si_dev->kobj, "bmc");
50c812b2 2376 if (intf->my_dev_name) {
16639eb0 2377 sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name);
50c812b2
CM		 2378 kfree(intf->my_dev_name);
2379 intf->my_dev_name = NULL;
2380 }
2381
2382 mutex_lock(&ipmidriver_mutex);
16639eb0 2383 kref_put(&bmc->usecount, cleanup_bmc_device);
f0b55da0 2384 intf->bmc = NULL;
50c812b2
CM		 2385 mutex_unlock(&ipmidriver_mutex);
2386}
2387
16639eb0 2388static int create_bmc_files(struct bmc_device *bmc)
5e59393e
JG		 2389{
2390 int err;
2391
5e59393e 2392 if (bmc->id.aux_firmware_revision_set) {
3d9e5df5 2393 bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
16639eb0 2394 err = device_create_file(&bmc->pdev.dev,
5e59393e 2395 &bmc->aux_firmware_rev_attr);
c70d7499 2396 if (err)
16639eb0 2397 goto out;
5e59393e
JG		 2398 }
2399 if (bmc->guid_set) {
3d9e5df5 2400 bmc->guid_attr.attr.name = "guid";
16639eb0 2401 err = device_create_file(&bmc->pdev.dev,
5e59393e 2402 &bmc->guid_attr);
c70d7499
CM		 2403 if (err)
2404 goto out_aux_firm;
5e59393e
JG		 2405 }
2406
2407 return 0;
2408
2409out_aux_firm:
2410 if (bmc->id.aux_firmware_revision_set)
16639eb0 2411 device_remove_file(&bmc->pdev.dev,
5e59393e 2412 &bmc->aux_firmware_rev_attr);
5e59393e
JG		 2413out:
2414 return err;
2415}
2416
5a0e10ec 2417static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum)
50c812b2
CM		 2418{
2419 int rv;
2420 struct bmc_device *bmc = intf->bmc;
2421 struct bmc_device *old_bmc;
50c812b2
CM		 2422
2423 mutex_lock(&ipmidriver_mutex);
2424
2425 /*
2426 * Try to find if there is an bmc_device struct
2427 * representing the interfaced BMC already
2428 */
2429 if (bmc->guid_set)
fe2d5ffc 2430 old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid);
50c812b2 2431 else
fe2d5ffc 2432 old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
50c812b2
CM		 2433 bmc->id.product_id,
2434 bmc->id.device_id);
2435
2436 /*
2437 * If there is already an bmc_device, free the new one,
2438 * otherwise register the new BMC device
2439 */
2440 if (old_bmc) {
2441 kfree(bmc);
2442 intf->bmc = old_bmc;
2443 bmc = old_bmc;
2444
16639eb0 2445 kref_get(&bmc->usecount);
50c812b2
CM		 2446 mutex_unlock(&ipmidriver_mutex);
2447
2448 printk(KERN_INFO
2449 "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2450 " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2451 bmc->id.manufacturer_id,
2452 bmc->id.product_id,
2453 bmc->id.device_id);
2454 } else {
f0b55da0
CM		 2455 unsigned char orig_dev_id = bmc->id.device_id;
2456 int warn_printed = 0;
2457
16639eb0 2458 snprintf(bmc->name, sizeof(bmc->name),
f0b55da0 2459 "ipmi_bmc.%4.4x", bmc->id.product_id);
16639eb0 2460 bmc->pdev.name = bmc->name;
f0b55da0 2461
fe2d5ffc 2462 while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
f0b55da0 2463 bmc->id.product_id,
1d5636cc 2464 bmc->id.device_id)) {
f0b55da0
CM		 2465 if (!warn_printed) {
2466 printk(KERN_WARNING PFX
2467 "This machine has two different BMCs"
2468 " with the same product id and device"
2469 " id. This is an error in the"
2470 " firmware, but incrementing the"
2471 " device id to work around the problem."
2472 " Prod ID = 0x%x, Dev ID = 0x%x\n",
2473 bmc->id.product_id, bmc->id.device_id);
2474 warn_printed = 1;
2475 }
2476 bmc->id.device_id++; /* Wraps at 255 */
2477 if (bmc->id.device_id == orig_dev_id) {
2478 printk(KERN_ERR PFX
2479 "Out of device ids!\n");
2480 break;
2481 }
2482 }
2483
16639eb0
CM		 2484 bmc->pdev.dev.driver = &ipmidriver.driver;
2485 bmc->pdev.id = bmc->id.device_id;
2486 bmc->pdev.dev.release = release_bmc_device;
2487 bmc->pdev.dev.type = &bmc_device_type;
5a0e10ec 2488 kref_init(&bmc->usecount);
50c812b2 2489
16639eb0 2490 rv = platform_device_register(&bmc->pdev);
50c812b2
CM		 2491 mutex_unlock(&ipmidriver_mutex);
2492 if (rv) {
16639eb0 2493 put_device(&bmc->pdev.dev);
50c812b2
CM		 2494 printk(KERN_ERR
2495 "ipmi_msghandler:"
2496 " Unable to register bmc device: %d\n",
2497 rv);
c70d7499
CM		 2498 /*
2499 * Don't go to out_err, you can only do that if
2500 * the device is registered already.
2501 */
50c812b2
CM		 2502 return rv;
2503 }
2504
16639eb0 2505 rv = create_bmc_files(bmc);
5e59393e
JG		 2506 if (rv) {
2507 mutex_lock(&ipmidriver_mutex);
16639eb0 2508 platform_device_unregister(&bmc->pdev);
5e59393e
JG		 2509 mutex_unlock(&ipmidriver_mutex);
2510
2511 return rv;
2512 }
50c812b2 2513
279fbd0c
MS		 2514 dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, "
2515 "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2516 bmc->id.manufacturer_id,
2517 bmc->id.product_id,
2518 bmc->id.device_id);
50c812b2
CM		 2519 }
2520
2521 /*
2522 * create symlink from system interface device to bmc device
2523 * and back.
2524 */
5a0e10ec 2525 rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc");
50c812b2
CM		 2526 if (rv) {
2527 printk(KERN_ERR
2528 "ipmi_msghandler: Unable to create bmc symlink: %d\n",
2529 rv);
2530 goto out_err;
2531 }
2532
16639eb0 2533 intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", ifnum);
50c812b2
CM		 2534 if (!intf->my_dev_name) {
2535 rv = -ENOMEM;
2536 printk(KERN_ERR
2537 "ipmi_msghandler: allocate link from BMC: %d\n",
2538 rv);
2539 goto out_err;
2540 }
50c812b2 2541
16639eb0 2542 rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj,
50c812b2
CM		 2543 intf->my_dev_name);
2544 if (rv) {
2545 kfree(intf->my_dev_name);
2546 intf->my_dev_name = NULL;
2547 printk(KERN_ERR
2548 "ipmi_msghandler:"
2549 " Unable to create symlink to bmc: %d\n",
2550 rv);
2551 goto out_err;
2552 }
2553
2554 return 0;
2555
2556out_err:
2557 ipmi_bmc_unregister(intf);
2558 return rv;
2559}
2560
2561static int
2562send_guid_cmd(ipmi_smi_t intf, int chan)
2563{
2564 struct kernel_ipmi_msg msg;
2565 struct ipmi_system_interface_addr si;
2566
2567 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2568 si.channel = IPMI_BMC_CHANNEL;
2569 si.lun = 0;
2570
2571 msg.netfn = IPMI_NETFN_APP_REQUEST;
2572 msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2573 msg.data = NULL;
2574 msg.data_len = 0;
2575 return i_ipmi_request(NULL,
2576 intf,
2577 (struct ipmi_addr *) &si,
2578 0,
2579 &msg,
2580 intf,
2581 NULL,
2582 NULL,
2583 0,
2584 intf->channels[0].address,
2585 intf->channels[0].lun,
2586 -1, 0);
2587}
2588
2589static void
2590guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2591{
2592 if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2593 || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2594 || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2595 /* Not for me */
2596 return;
2597
2598 if (msg->msg.data[0] != 0) {
2599 /* Error from getting the GUID, the BMC doesn't have one. */
2600 intf->bmc->guid_set = 0;
2601 goto out;
2602 }
2603
2604 if (msg->msg.data_len < 17) {
2605 intf->bmc->guid_set = 0;
2606 printk(KERN_WARNING PFX
2607 "guid_handler: The GUID response from the BMC was too"
2608 " short, it was %d but should have been 17. Assuming"
2609 " GUID is not available.\n",
2610 msg->msg.data_len);
2611 goto out;
2612 }
2613
2614 memcpy(intf->bmc->guid, msg->msg.data, 16);
2615 intf->bmc->guid_set = 1;
2616 out:
2617 wake_up(&intf->waitq);
2618}
2619
2620static void
2621get_guid(ipmi_smi_t intf)
2622{
2623 int rv;
2624
2625 intf->bmc->guid_set = 0x2;
2626 intf->null_user_handler = guid_handler;
2627 rv = send_guid_cmd(intf, 0);
2628 if (rv)
2629 /* Send failed, no GUID available. */
2630 intf->bmc->guid_set = 0;
2631 wait_event(intf->waitq, intf->bmc->guid_set != 2);
2632 intf->null_user_handler = NULL;
2633}
2634
1da177e4
LT		 2635static int
2636send_channel_info_cmd(ipmi_smi_t intf, int chan)
2637{
2638 struct kernel_ipmi_msg msg;
2639 unsigned char data[1];
2640 struct ipmi_system_interface_addr si;
2641
2642 si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2643 si.channel = IPMI_BMC_CHANNEL;
2644 si.lun = 0;
2645
2646 msg.netfn = IPMI_NETFN_APP_REQUEST;
2647 msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2648 msg.data = data;
2649 msg.data_len = 1;
2650 data[0] = chan;
2651 return i_ipmi_request(NULL,
2652 intf,
2653 (struct ipmi_addr *) &si,
2654 0,
2655 &msg,
56a55ec6 2656 intf,
1da177e4
LT		 2657 NULL,
2658 NULL,
2659 0,
c14979b9
CM		 2660 intf->channels[0].address,
2661 intf->channels[0].lun,
1da177e4
LT		 2662 -1, 0);
2663}
2664
2665static void
56a55ec6 2666channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4
LT		 2667{
2668 int rv = 0;
2669 int chan;
2670
56a55ec6
CM		 2671 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2672 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
c70d7499 2673 && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
1da177e4 2674 /* It's the one we want */
56a55ec6 2675 if (msg->msg.data[0] != 0) {
1da177e4
LT		 2676 /* Got an error from the channel, just go on. */
2677
56a55ec6 2678 if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
c70d7499
CM		 2679 /*
2680 * If the MC does not support this
2681 * command, that is legal. We just
2682 * assume it has one IPMB at channel
2683 * zero.
2684 */
1da177e4
LT		 2685 intf->channels[0].medium
2686 = IPMI_CHANNEL_MEDIUM_IPMB;
2687 intf->channels[0].protocol
2688 = IPMI_CHANNEL_PROTOCOL_IPMB;
1da177e4
LT		 2689
2690 intf->curr_channel = IPMI_MAX_CHANNELS;
2691 wake_up(&intf->waitq);
2692 goto out;
2693 }
2694 goto next_channel;
2695 }
56a55ec6 2696 if (msg->msg.data_len < 4) {
1da177e4
LT		 2697 /* Message not big enough, just go on. */
2698 goto next_channel;
2699 }
2700 chan = intf->curr_channel;
56a55ec6
CM		 2701 intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2702 intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
1da177e4 2703
c70d7499 2704 next_channel:
1da177e4
LT		 2705 intf->curr_channel++;
2706 if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2707 wake_up(&intf->waitq);
2708 else
2709 rv = send_channel_info_cmd(intf, intf->curr_channel);
2710
2711 if (rv) {
2712 /* Got an error somehow, just give up. */
1f668423
CM		 2713 printk(KERN_WARNING PFX
2714 "Error sending channel information for channel"
2715 " %d: %d\n", intf->curr_channel, rv);
2716
1da177e4
LT		 2717 intf->curr_channel = IPMI_MAX_CHANNELS;
2718 wake_up(&intf->waitq);
1da177e4
LT		 2719 }
2720 }
2721 out:
2722 return;
2723}
2724
895dcfd1 2725static void ipmi_poll(ipmi_smi_t intf)
fcfa4724 2726{
fcfa4724
CM		 2727 if (intf->handlers->poll)
2728 intf->handlers->poll(intf->send_info);
7adf579c
CM		 2729 /* In case something came in */
2730 handle_new_recv_msgs(intf);
fcfa4724 2731}
895dcfd1
CM		 2732
2733void ipmi_poll_interface(ipmi_user_t user)
2734{
2735 ipmi_poll(user->intf);
fcfa4724 2736}
c70d7499 2737EXPORT_SYMBOL(ipmi_poll_interface);
fcfa4724 2738
1da177e4
LT		 2739int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2740 void *send_info,
50c812b2
CM		 2741 struct ipmi_device_id *device_id,
2742 struct device *si_dev,
453823ba 2743 unsigned char slave_addr)
1da177e4
LT		 2744{
2745 int i, j;
2746 int rv;
393d2cc3 2747 ipmi_smi_t intf;
bca0324d 2748 ipmi_smi_t tintf;
bca0324d 2749 struct list_head *link;
1da177e4 2750
c70d7499
CM		 2751 /*
2752 * Make sure the driver is actually initialized, this handles
2753 * problems with initialization order.
2754 */
1da177e4
LT		 2755 if (!initialized) {
2756 rv = ipmi_init_msghandler();
2757 if (rv)
2758 return rv;
c70d7499
CM		 2759 /*
2760 * The init code doesn't return an error if it was turned
2761 * off, but it won't initialize. Check that.
2762 */
1da177e4
LT		 2763 if (!initialized)
2764 return -ENODEV;
2765 }
2766
dd00cc48 2767 intf = kzalloc(sizeof(*intf), GFP_KERNEL);
393d2cc3 2768 if (!intf)
1da177e4 2769 return -ENOMEM;
b2c03941
CM		 2770
2771 intf->ipmi_version_major = ipmi_version_major(device_id);
2772 intf->ipmi_version_minor = ipmi_version_minor(device_id);
2773
50c812b2
CM		 2774 intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2775 if (!intf->bmc) {
2776 kfree(intf);
2777 return -ENOMEM;
2778 }
bca0324d 2779 intf->intf_num = -1; /* Mark it invalid for now. */
393d2cc3 2780 kref_init(&intf->refcount);
50c812b2
CM		 2781 intf->bmc->id = *device_id;
2782 intf->si_dev = si_dev;
393d2cc3
CM		 2783 for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2784 intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2785 intf->channels[j].lun = 2;
2786 }
2787 if (slave_addr != 0)
2788 intf->channels[0].address = slave_addr;
2789 INIT_LIST_HEAD(&intf->users);
2790 intf->handlers = handlers;
2791 intf->send_info = send_info;
2792 spin_lock_init(&intf->seq_lock);
2793 for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2794 intf->seq_table[j].inuse = 0;
2795 intf->seq_table[j].seqid = 0;
2796 }
2797 intf->curr_seq = 0;
2798#ifdef CONFIG_PROC_FS
ac019151 2799 mutex_init(&intf->proc_entry_lock);
393d2cc3
CM		 2800#endif
2801 spin_lock_init(&intf->waiting_msgs_lock);
2802 INIT_LIST_HEAD(&intf->waiting_msgs);
7adf579c
CM		 2803 tasklet_init(&intf->recv_tasklet,
2804 smi_recv_tasklet,
2805 (unsigned long) intf);
2806 atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
393d2cc3 2807 spin_lock_init(&intf->events_lock);
89986496
CM		 2808 atomic_set(&intf->event_waiters, 0);
2809 intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
393d2cc3
CM		 2810 INIT_LIST_HEAD(&intf->waiting_events);
2811 intf->waiting_events_count = 0;
d6dfd131 2812 mutex_init(&intf->cmd_rcvrs_mutex);
b9675136 2813 spin_lock_init(&intf->maintenance_mode_lock);
393d2cc3
CM		 2814 INIT_LIST_HEAD(&intf->cmd_rcvrs);
2815 init_waitqueue_head(&intf->waitq);
b2655f26
KB		 2816 for (i = 0; i < IPMI_NUM_STATS; i++)
2817 atomic_set(&intf->stats[i], 0);
393d2cc3 2818
393d2cc3 2819 intf->proc_dir = NULL;
1da177e4 2820
b2c03941 2821 mutex_lock(&smi_watchers_mutex);
bca0324d
CM		 2822 mutex_lock(&ipmi_interfaces_mutex);
2823 /* Look for a hole in the numbers. */
2824 i = 0;
2825 link = &ipmi_interfaces;
2826 list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
2827 if (tintf->intf_num != i) {
2828 link = &tintf->link;
1da177e4
LT		 2829 break;
2830 }
bca0324d 2831 i++;
1da177e4 2832 }
bca0324d
CM		 2833 /* Add the new interface in numeric order. */
2834 if (i == 0)
2835 list_add_rcu(&intf->link, &ipmi_interfaces);
2836 else
2837 list_add_tail_rcu(&intf->link, link);
1da177e4 2838
453823ba
CM		 2839 rv = handlers->start_processing(send_info, intf);
2840 if (rv)
2841 goto out;
1da177e4 2842
50c812b2
CM		 2843 get_guid(intf);
2844
b2c03941 2845 if ((intf->ipmi_version_major > 1)
c70d7499
CM		 2846 || ((intf->ipmi_version_major == 1)
2847 && (intf->ipmi_version_minor >= 5))) {
2848 /*
2849 * Start scanning the channels to see what is
2850 * available.
2851 */
393d2cc3
CM		 2852 intf->null_user_handler = channel_handler;
2853 intf->curr_channel = 0;
2854 rv = send_channel_info_cmd(intf, 0);
1f668423
CM		 2855 if (rv) {
2856 printk(KERN_WARNING PFX
2857 "Error sending channel information for channel"
2858 " 0, %d\n", rv);
393d2cc3 2859 goto out;
1f668423 2860 }
1da177e4 2861
393d2cc3
CM		 2862 /* Wait for the channel info to be read. */
2863 wait_event(intf->waitq,
2864 intf->curr_channel >= IPMI_MAX_CHANNELS);
50c812b2 2865 intf->null_user_handler = NULL;
393d2cc3
CM		 2866 } else {
2867 /* Assume a single IPMB channel at zero. */
2868 intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2869 intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
9a2845c4 2870 intf->curr_channel = IPMI_MAX_CHANNELS;
1da177e4
LT		 2871 }
2872
393d2cc3
CM		 2873 if (rv == 0)
2874 rv = add_proc_entries(intf, i);
1da177e4 2875
5a0e10ec 2876 rv = ipmi_bmc_register(intf, i);
50c812b2 2877
393d2cc3 2878 out:
1da177e4 2879 if (rv) {
393d2cc3
CM		 2880 if (intf->proc_dir)
2881 remove_proc_entries(intf);
b2c03941 2882 intf->handlers = NULL;
bca0324d
CM		 2883 list_del_rcu(&intf->link);
2884 mutex_unlock(&ipmi_interfaces_mutex);
b2c03941 2885 mutex_unlock(&smi_watchers_mutex);
bca0324d 2886 synchronize_rcu();
393d2cc3 2887 kref_put(&intf->refcount, intf_free);
393d2cc3 2888 } else {
78ba2faf
CM		 2889 /*
2890 * Keep memory order straight for RCU readers. Make
2891 * sure everything else is committed to memory before
2892 * setting intf_num to mark the interface valid.
2893 */
2894 smp_wmb();
bca0324d
CM		 2895 intf->intf_num = i;
2896 mutex_unlock(&ipmi_interfaces_mutex);
78ba2faf 2897 /* After this point the interface is legal to use. */
50c812b2 2898 call_smi_watchers(i, intf->si_dev);
b2c03941 2899 mutex_unlock(&smi_watchers_mutex);
1da177e4
LT		 2900 }
2901
2902 return rv;
2903}
c70d7499 2904EXPORT_SYMBOL(ipmi_register_smi);
1da177e4 2905
b2c03941
CM		 2906static void cleanup_smi_msgs(ipmi_smi_t intf)
2907{
2908 int i;
2909 struct seq_table *ent;
2910
2911 /* No need for locks, the interface is down. */
2912 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
2913 ent = &(intf->seq_table[i]);
2914 if (!ent->inuse)
2915 continue;
2916 deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
2917 }
2918}
2919
1da177e4
LT		 2920int ipmi_unregister_smi(ipmi_smi_t intf)
2921{
1da177e4 2922 struct ipmi_smi_watcher *w;
b2c03941 2923 int intf_num = intf->intf_num;
1da177e4 2924
50c812b2
CM		 2925 ipmi_bmc_unregister(intf);
2926
b2c03941 2927 mutex_lock(&smi_watchers_mutex);
bca0324d 2928 mutex_lock(&ipmi_interfaces_mutex);
b2c03941
CM		 2929 intf->intf_num = -1;
2930 intf->handlers = NULL;
bca0324d
CM		 2931 list_del_rcu(&intf->link);
2932 mutex_unlock(&ipmi_interfaces_mutex);
2933 synchronize_rcu();
1da177e4 2934
b2c03941
CM		 2935 cleanup_smi_msgs(intf);
2936
393d2cc3 2937 remove_proc_entries(intf);
1da177e4 2938
c70d7499
CM		 2939 /*
2940 * Call all the watcher interfaces to tell them that
2941 * an interface is gone.
2942 */
393d2cc3 2943 list_for_each_entry(w, &smi_watchers, link)
b2c03941
CM		 2944 w->smi_gone(intf_num);
2945 mutex_unlock(&smi_watchers_mutex);
393d2cc3 2946
393d2cc3 2947 kref_put(&intf->refcount, intf_free);
1da177e4
LT		 2948 return 0;
2949}
c70d7499 2950EXPORT_SYMBOL(ipmi_unregister_smi);
1da177e4
LT		 2951
2952static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
2953 struct ipmi_smi_msg *msg)
2954{
2955 struct ipmi_ipmb_addr ipmb_addr;
2956 struct ipmi_recv_msg *recv_msg;
1da177e4 2957
c70d7499
CM		 2958 /*
2959 * This is 11, not 10, because the response must contain a
2960 * completion code.
2961 */
1da177e4
LT		 2962 if (msg->rsp_size < 11) {
2963 /* Message not big enough, just ignore it. */
b2655f26 2964 ipmi_inc_stat(intf, invalid_ipmb_responses);
1da177e4
LT		 2965 return 0;
2966 }
2967
2968 if (msg->rsp[2] != 0) {
2969 /* An error getting the response, just ignore it. */
2970 return 0;
2971 }
2972
2973 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
2974 ipmb_addr.slave_addr = msg->rsp[6];
2975 ipmb_addr.channel = msg->rsp[3] & 0x0f;
2976 ipmb_addr.lun = msg->rsp[7] & 3;
2977
c70d7499
CM		 2978 /*
2979 * It's a response from a remote entity. Look up the sequence
2980 * number and handle the response.
2981 */
1da177e4
LT		 2982 if (intf_find_seq(intf,
2983 msg->rsp[7] >> 2,
2984 msg->rsp[3] & 0x0f,
2985 msg->rsp[8],
2986 (msg->rsp[4] >> 2) & (~1),
2987 (struct ipmi_addr *) &(ipmb_addr),
c70d7499
CM		 2988 &recv_msg)) {
2989 /*
2990 * We were unable to find the sequence number,
2991 * so just nuke the message.
2992 */
b2655f26 2993 ipmi_inc_stat(intf, unhandled_ipmb_responses);
1da177e4
LT		 2994 return 0;
2995 }
2996
2997 memcpy(recv_msg->msg_data,
2998 &(msg->rsp[9]),
2999 msg->rsp_size - 9);
c70d7499
CM		 3000 /*
3001 * The other fields matched, so no need to set them, except
3002 * for netfn, which needs to be the response that was
3003 * returned, not the request value.
3004 */
1da177e4
LT		 3005 recv_msg->msg.netfn = msg->rsp[4] >> 2;
3006 recv_msg->msg.data = recv_msg->msg_data;
3007 recv_msg->msg.data_len = msg->rsp_size - 10;
3008 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
b2655f26 3009 ipmi_inc_stat(intf, handled_ipmb_responses);
1da177e4
LT		 3010 deliver_response(recv_msg);
3011
3012 return 0;
3013}
3014
3015static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
3016 struct ipmi_smi_msg *msg)
3017{
393d2cc3
CM		 3018 struct cmd_rcvr *rcvr;
3019 int rv = 0;
3020 unsigned char netfn;
3021 unsigned char cmd;
c69c3127 3022 unsigned char chan;
393d2cc3
CM		 3023 ipmi_user_t user = NULL;
3024 struct ipmi_ipmb_addr *ipmb_addr;
3025 struct ipmi_recv_msg *recv_msg;
b2c03941 3026 struct ipmi_smi_handlers *handlers;
1da177e4
LT		 3027
3028 if (msg->rsp_size < 10) {
3029 /* Message not big enough, just ignore it. */
b2655f26 3030 ipmi_inc_stat(intf, invalid_commands);
1da177e4
LT		 3031 return 0;
3032 }
3033
3034 if (msg->rsp[2] != 0) {
3035 /* An error getting the response, just ignore it. */
3036 return 0;
3037 }
3038
3039 netfn = msg->rsp[4] >> 2;
3040 cmd = msg->rsp[8];
c69c3127 3041 chan = msg->rsp[3] & 0xf;
1da177e4 3042
e61fb5b6 3043 rcu_read_lock();
c69c3127 3044 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
393d2cc3
CM		 3045 if (rcvr) {
3046 user = rcvr->user;
3047 kref_get(&user->refcount);
3048 } else
3049 user = NULL;
e61fb5b6 3050 rcu_read_unlock();
1da177e4
LT		 3051
3052 if (user == NULL) {
3053 /* We didn't find a user, deliver an error response. */
b2655f26 3054 ipmi_inc_stat(intf, unhandled_commands);
1da177e4
LT		 3055
3056 msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
3057 msg->data[1] = IPMI_SEND_MSG_CMD;
3058 msg->data[2] = msg->rsp[3];
3059 msg->data[3] = msg->rsp[6];
c70d7499 3060 msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
1da177e4 3061 msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
c14979b9 3062 msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
c70d7499
CM		 3063 /* rqseq/lun */
3064 msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
1da177e4
LT		 3065 msg->data[8] = msg->rsp[8]; /* cmd */
3066 msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
3067 msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
3068 msg->data_size = 11;
3069
3070#ifdef DEBUG_MSGING
3071 {
3072 int m;
3073 printk("Invalid command:");
e8b33617 3074 for (m = 0; m < msg->data_size; m++)
1da177e4
LT		 3075 printk(" %2.2x", msg->data[m]);
3076 printk("\n");
3077 }
3078#endif
b2c03941
CM		 3079 rcu_read_lock();
3080 handlers = intf->handlers;
3081 if (handlers) {
3082 handlers->sender(intf->send_info, msg, 0);
c70d7499
CM		 3083 /*
3084 * We used the message, so return the value
3085 * that causes it to not be freed or
3086 * queued.
3087 */
b2c03941
CM		 3088 rv = -1;
3089 }
3090 rcu_read_unlock();
1da177e4
LT		 3091 } else {
3092 /* Deliver the message to the user. */
b2655f26 3093 ipmi_inc_stat(intf, handled_commands);
1da177e4
LT		 3094
3095 recv_msg = ipmi_alloc_recv_msg();
8a3628d5 3096 if (!recv_msg) {
c70d7499
CM		 3097 /*
3098 * We couldn't allocate memory for the
3099 * message, so requeue it for handling
3100 * later.
3101 */
1da177e4 3102 rv = 1;
393d2cc3 3103 kref_put(&user->refcount, free_user);
1da177e4
LT		 3104 } else {
3105 /* Extract the source address from the data. */
3106 ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
3107 ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
3108 ipmb_addr->slave_addr = msg->rsp[6];
3109 ipmb_addr->lun = msg->rsp[7] & 3;
3110 ipmb_addr->channel = msg->rsp[3] & 0xf;
3111
c70d7499
CM		 3112 /*
3113 * Extract the rest of the message information
3114 * from the IPMB header.
3115 */
1da177e4
LT		 3116 recv_msg->user = user;
3117 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3118 recv_msg->msgid = msg->rsp[7] >> 2;
3119 recv_msg->msg.netfn = msg->rsp[4] >> 2;
3120 recv_msg->msg.cmd = msg->rsp[8];
3121 recv_msg->msg.data = recv_msg->msg_data;
3122
c70d7499
CM		 3123 /*
3124 * We chop off 10, not 9 bytes because the checksum
3125 * at the end also needs to be removed.
3126 */
1da177e4
LT		 3127 recv_msg->msg.data_len = msg->rsp_size - 10;
3128 memcpy(recv_msg->msg_data,
3129 &(msg->rsp[9]),
3130 msg->rsp_size - 10);
3131 deliver_response(recv_msg);
3132 }
3133 }
3134
3135 return rv;
3136}
3137
3138static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
3139 struct ipmi_smi_msg *msg)
3140{
3141 struct ipmi_lan_addr lan_addr;
3142 struct ipmi_recv_msg *recv_msg;
1da177e4
LT		 3143
3144
c70d7499
CM		 3145 /*
3146 * This is 13, not 12, because the response must contain a
3147 * completion code.
3148 */
1da177e4
LT		 3149 if (msg->rsp_size < 13) {
3150 /* Message not big enough, just ignore it. */
b2655f26 3151 ipmi_inc_stat(intf, invalid_lan_responses);
1da177e4
LT		 3152 return 0;
3153 }
3154
3155 if (msg->rsp[2] != 0) {
3156 /* An error getting the response, just ignore it. */
3157 return 0;
3158 }
3159
3160 lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
3161 lan_addr.session_handle = msg->rsp[4];
3162 lan_addr.remote_SWID = msg->rsp[8];
3163 lan_addr.local_SWID = msg->rsp[5];
3164 lan_addr.channel = msg->rsp[3] & 0x0f;
3165 lan_addr.privilege = msg->rsp[3] >> 4;
3166 lan_addr.lun = msg->rsp[9] & 3;
3167
c70d7499
CM		 3168 /*
3169 * It's a response from a remote entity. Look up the sequence
3170 * number and handle the response.
3171 */
1da177e4
LT		 3172 if (intf_find_seq(intf,
3173 msg->rsp[9] >> 2,
3174 msg->rsp[3] & 0x0f,
3175 msg->rsp[10],
3176 (msg->rsp[6] >> 2) & (~1),
3177 (struct ipmi_addr *) &(lan_addr),
c70d7499
CM		 3178 &recv_msg)) {
3179 /*
3180 * We were unable to find the sequence number,
3181 * so just nuke the message.
3182 */
b2655f26 3183 ipmi_inc_stat(intf, unhandled_lan_responses);
1da177e4
LT		 3184 return 0;
3185 }
3186
3187 memcpy(recv_msg->msg_data,
3188 &(msg->rsp[11]),
3189 msg->rsp_size - 11);
c70d7499
CM		 3190 /*
3191 * The other fields matched, so no need to set them, except
3192 * for netfn, which needs to be the response that was
3193 * returned, not the request value.
3194 */
1da177e4
LT		 3195 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3196 recv_msg->msg.data = recv_msg->msg_data;
3197 recv_msg->msg.data_len = msg->rsp_size - 12;
3198 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
b2655f26 3199 ipmi_inc_stat(intf, handled_lan_responses);
1da177e4
LT		 3200 deliver_response(recv_msg);
3201
3202 return 0;
3203}
3204
3205static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
3206 struct ipmi_smi_msg *msg)
3207{
393d2cc3
CM		 3208 struct cmd_rcvr *rcvr;
3209 int rv = 0;
3210 unsigned char netfn;
3211 unsigned char cmd;
c69c3127 3212 unsigned char chan;
393d2cc3
CM		 3213 ipmi_user_t user = NULL;
3214 struct ipmi_lan_addr *lan_addr;
3215 struct ipmi_recv_msg *recv_msg;
1da177e4
LT		 3216
3217 if (msg->rsp_size < 12) {
3218 /* Message not big enough, just ignore it. */
b2655f26 3219 ipmi_inc_stat(intf, invalid_commands);
1da177e4
LT		 3220 return 0;
3221 }
3222
3223 if (msg->rsp[2] != 0) {
3224 /* An error getting the response, just ignore it. */
3225 return 0;
3226 }
3227
3228 netfn = msg->rsp[6] >> 2;
3229 cmd = msg->rsp[10];
c69c3127 3230 chan = msg->rsp[3] & 0xf;
1da177e4 3231
e61fb5b6 3232 rcu_read_lock();
c69c3127 3233 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
393d2cc3
CM		 3234 if (rcvr) {
3235 user = rcvr->user;
3236 kref_get(&user->refcount);
3237 } else
3238 user = NULL;
e61fb5b6 3239 rcu_read_unlock();
1da177e4
LT		 3240
3241 if (user == NULL) {
393d2cc3 3242 /* We didn't find a user, just give up. */
b2655f26 3243 ipmi_inc_stat(intf, unhandled_commands);
1da177e4 3244
c70d7499
CM		 3245 /*
3246 * Don't do anything with these messages, just allow
3247 * them to be freed.
3248 */
3249 rv = 0;
1da177e4
LT		 3250 } else {
3251 /* Deliver the message to the user. */
b2655f26 3252 ipmi_inc_stat(intf, handled_commands);
1da177e4
LT		 3253
3254 recv_msg = ipmi_alloc_recv_msg();
8a3628d5 3255 if (!recv_msg) {
c70d7499
CM		 3256 /*
3257 * We couldn't allocate memory for the
3258 * message, so requeue it for handling later.
3259 */
1da177e4 3260 rv = 1;
393d2cc3 3261 kref_put(&user->refcount, free_user);
1da177e4
LT		 3262 } else {
3263 /* Extract the source address from the data. */
3264 lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
3265 lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
3266 lan_addr->session_handle = msg->rsp[4];
3267 lan_addr->remote_SWID = msg->rsp[8];
3268 lan_addr->local_SWID = msg->rsp[5];
3269 lan_addr->lun = msg->rsp[9] & 3;
3270 lan_addr->channel = msg->rsp[3] & 0xf;
3271 lan_addr->privilege = msg->rsp[3] >> 4;
3272
c70d7499
CM		 3273 /*
3274 * Extract the rest of the message information
3275 * from the IPMB header.
3276 */
1da177e4
LT		 3277 recv_msg->user = user;
3278 recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3279 recv_msg->msgid = msg->rsp[9] >> 2;
3280 recv_msg->msg.netfn = msg->rsp[6] >> 2;
3281 recv_msg->msg.cmd = msg->rsp[10];
3282 recv_msg->msg.data = recv_msg->msg_data;
3283
c70d7499
CM		 3284 /*
3285 * We chop off 12, not 11 bytes because the checksum
3286 * at the end also needs to be removed.
3287 */
1da177e4
LT		 3288 recv_msg->msg.data_len = msg->rsp_size - 12;
3289 memcpy(recv_msg->msg_data,
3290 &(msg->rsp[11]),
3291 msg->rsp_size - 12);
3292 deliver_response(recv_msg);
3293 }
3294 }
3295
3296 return rv;
3297}
3298
4dec302f 3299/*
3300 * This routine will handle "Get Message" command responses with
3301 * channels that use an OEM Medium. The message format belongs to
3302 * the OEM. See IPMI 2.0 specification, Chapter 6 and
3303 * Chapter 22, sections 22.6 and 22.24 for more details.
3304 */
3305static int handle_oem_get_msg_cmd(ipmi_smi_t intf,
3306 struct ipmi_smi_msg *msg)
3307{
3308 struct cmd_rcvr *rcvr;
3309 int rv = 0;
3310 unsigned char netfn;
3311 unsigned char cmd;
3312 unsigned char chan;
3313 ipmi_user_t user = NULL;
3314 struct ipmi_system_interface_addr *smi_addr;
3315 struct ipmi_recv_msg *recv_msg;
3316
3317 /*
3318 * We expect the OEM SW to perform error checking
3319 * so we just do some basic sanity checks
3320 */
3321 if (msg->rsp_size < 4) {
3322 /* Message not big enough, just ignore it. */
3323 ipmi_inc_stat(intf, invalid_commands);
3324 return 0;
3325 }
3326
3327 if (msg->rsp[2] != 0) {
3328 /* An error getting the response, just ignore it. */
3329 return 0;
3330 }
3331
3332 /*
3333 * This is an OEM Message so the OEM needs to know how
3334 * handle the message. We do no interpretation.
3335 */
3336 netfn = msg->rsp[0] >> 2;
3337 cmd = msg->rsp[1];
3338 chan = msg->rsp[3] & 0xf;
3339
3340 rcu_read_lock();
3341 rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3342 if (rcvr) {
3343 user = rcvr->user;
3344 kref_get(&user->refcount);
3345 } else
3346 user = NULL;
3347 rcu_read_unlock();
3348
3349 if (user == NULL) {
3350 /* We didn't find a user, just give up. */
3351 ipmi_inc_stat(intf, unhandled_commands);
3352
3353 /*
3354 * Don't do anything with these messages, just allow
3355 * them to be freed.
3356 */
3357
3358 rv = 0;
3359 } else {
3360 /* Deliver the message to the user. */
3361 ipmi_inc_stat(intf, handled_commands);
3362
3363 recv_msg = ipmi_alloc_recv_msg();
3364 if (!recv_msg) {
3365 /*
3366 * We couldn't allocate memory for the
3367 * message, so requeue it for handling
3368 * later.
3369 */
3370 rv = 1;
3371 kref_put(&user->refcount, free_user);
3372 } else {
3373 /*
3374 * OEM Messages are expected to be delivered via
3375 * the system interface to SMS software. We might
3376 * need to visit this again depending on OEM
3377 * requirements
3378 */
3379 smi_addr = ((struct ipmi_system_interface_addr *)
3380 &(recv_msg->addr));
3381 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3382 smi_addr->channel = IPMI_BMC_CHANNEL;
3383 smi_addr->lun = msg->rsp[0] & 3;
3384
3385 recv_msg->user = user;
3386 recv_msg->user_msg_data = NULL;
3387 recv_msg->recv_type = IPMI_OEM_RECV_TYPE;
3388 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3389 recv_msg->msg.cmd = msg->rsp[1];
3390 recv_msg->msg.data = recv_msg->msg_data;
3391
3392 /*
3393 * The message starts at byte 4 which follows the
3394 * the Channel Byte in the "GET MESSAGE" command
3395 */
3396 recv_msg->msg.data_len = msg->rsp_size - 4;
3397 memcpy(recv_msg->msg_data,
3398 &(msg->rsp[4]),
3399 msg->rsp_size - 4);
3400 deliver_response(recv_msg);
3401 }
3402 }
3403
3404 return rv;
3405}
3406
1da177e4
LT		 3407static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
3408 struct ipmi_smi_msg *msg)
3409{
3410 struct ipmi_system_interface_addr *smi_addr;
c70d7499 3411
1da177e4
LT		 3412 recv_msg->msgid = 0;
3413 smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
3414 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3415 smi_addr->channel = IPMI_BMC_CHANNEL;
3416 smi_addr->lun = msg->rsp[0] & 3;
3417 recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
3418 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3419 recv_msg->msg.cmd = msg->rsp[1];
3420 memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
3421 recv_msg->msg.data = recv_msg->msg_data;
3422 recv_msg->msg.data_len = msg->rsp_size - 3;
3423}
3424
1da177e4
LT		 3425static int handle_read_event_rsp(ipmi_smi_t intf,
3426 struct ipmi_smi_msg *msg)
3427{
3428 struct ipmi_recv_msg *recv_msg, *recv_msg2;
3429 struct list_head msgs;
3430 ipmi_user_t user;
3431 int rv = 0;
3432 int deliver_count = 0;
3433 unsigned long flags;
3434
3435 if (msg->rsp_size < 19) {
3436 /* Message is too small to be an IPMB event. */
b2655f26 3437 ipmi_inc_stat(intf, invalid_events);
1da177e4
LT		 3438 return 0;
3439 }
3440
3441 if (msg->rsp[2] != 0) {
3442 /* An error getting the event, just ignore it. */
3443 return 0;
3444 }
3445
3446 INIT_LIST_HEAD(&msgs);
3447
393d2cc3 3448 spin_lock_irqsave(&intf->events_lock, flags);
1da177e4 3449
b2655f26 3450 ipmi_inc_stat(intf, events);
1da177e4 3451
c70d7499
CM		 3452 /*
3453 * Allocate and fill in one message for every user that is
3454 * getting events.
3455 */
393d2cc3
CM		 3456 rcu_read_lock();
3457 list_for_each_entry_rcu(user, &intf->users, link) {
8a3628d5 3458 if (!user->gets_events)
1da177e4
LT		 3459 continue;
3460
3461 recv_msg = ipmi_alloc_recv_msg();
8a3628d5 3462 if (!recv_msg) {
393d2cc3 3463 rcu_read_unlock();
8a3628d5
CM		 3464 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
3465 link) {
1da177e4
LT		 3466 list_del(&recv_msg->link);
3467 ipmi_free_recv_msg(recv_msg);
3468 }
c70d7499
CM		 3469 /*
3470 * We couldn't allocate memory for the
3471 * message, so requeue it for handling
3472 * later.
3473 */
1da177e4
LT		 3474 rv = 1;
3475 goto out;
3476 }
3477
3478 deliver_count++;
3479
3480 copy_event_into_recv_msg(recv_msg, msg);
3481 recv_msg->user = user;
393d2cc3 3482 kref_get(&user->refcount);
1da177e4
LT		 3483 list_add_tail(&(recv_msg->link), &msgs);
3484 }
393d2cc3 3485 rcu_read_unlock();
1da177e4
LT		 3486
3487 if (deliver_count) {
3488 /* Now deliver all the messages. */
3489 list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
3490 list_del(&recv_msg->link);
3491 deliver_response(recv_msg);
3492 }
3493 } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
c70d7499
CM		 3494 /*
3495 * No one to receive the message, put it in queue if there's
3496 * not already too many things in the queue.
3497 */
1da177e4 3498 recv_msg = ipmi_alloc_recv_msg();
8a3628d5 3499 if (!recv_msg) {
c70d7499
CM		 3500 /*
3501 * We couldn't allocate memory for the
3502 * message, so requeue it for handling
3503 * later.
3504 */
1da177e4
LT		 3505 rv = 1;
3506 goto out;
3507 }
3508
3509 copy_event_into_recv_msg(recv_msg, msg);
3510 list_add_tail(&(recv_msg->link), &(intf->waiting_events));
4791c03d 3511 intf->waiting_events_count++;
87ebd06f 3512 } else if (!intf->event_msg_printed) {
c70d7499
CM		 3513 /*
3514 * There's too many things in the queue, discard this
3515 * message.
3516 */
87ebd06f
CM		 3517 printk(KERN_WARNING PFX "Event queue full, discarding"
3518 " incoming events\n");
3519 intf->event_msg_printed = 1;
1da177e4
LT		 3520 }
3521
3522 out:
3523 spin_unlock_irqrestore(&(intf->events_lock), flags);
3524
3525 return rv;
3526}
3527
3528static int handle_bmc_rsp(ipmi_smi_t intf,
3529 struct ipmi_smi_msg *msg)
3530{
3531 struct ipmi_recv_msg *recv_msg;
393d2cc3 3532 struct ipmi_user *user;
1da177e4
LT		 3533
3534 recv_msg = (struct ipmi_recv_msg *) msg->user_data;
c70d7499
CM		 3535 if (recv_msg == NULL) {
3536 printk(KERN_WARNING
3537 "IPMI message received with no owner. This\n"
3538 "could be because of a malformed message, or\n"
3539 "because of a hardware error. Contact your\n"
3540 "hardware vender for assistance\n");
56a55ec6
CM		 3541 return 0;
3542 }
1da177e4 3543
393d2cc3 3544 user = recv_msg->user;
1da177e4 3545 /* Make sure the user still exists. */
393d2cc3 3546 if (user && !user->valid) {
56a55ec6 3547 /* The user for the message went away, so give up. */
b2655f26 3548 ipmi_inc_stat(intf, unhandled_local_responses);
1da177e4
LT		 3549 ipmi_free_recv_msg(recv_msg);
3550 } else {
3551 struct ipmi_system_interface_addr *smi_addr;
3552
b2655f26 3553 ipmi_inc_stat(intf, handled_local_responses);
1da177e4
LT		 3554 recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3555 recv_msg->msgid = msg->msgid;
3556 smi_addr = ((struct ipmi_system_interface_addr *)
3557 &(recv_msg->addr));
3558 smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3559 smi_addr->channel = IPMI_BMC_CHANNEL;
3560 smi_addr->lun = msg->rsp[0] & 3;
3561 recv_msg->msg.netfn = msg->rsp[0] >> 2;
3562 recv_msg->msg.cmd = msg->rsp[1];
3563 memcpy(recv_msg->msg_data,
3564 &(msg->rsp[2]),
3565 msg->rsp_size - 2);
3566 recv_msg->msg.data = recv_msg->msg_data;
3567 recv_msg->msg.data_len = msg->rsp_size - 2;
3568 deliver_response(recv_msg);
3569 }
3570
3571 return 0;
3572}
3573
c70d7499 3574/*
7adf579c 3575 * Handle a received message. Return 1 if the message should be requeued,
c70d7499
CM		 3576 * 0 if the message should be freed, or -1 if the message should not
3577 * be freed or requeued.
3578 */
7adf579c 3579static int handle_one_recv_msg(ipmi_smi_t intf,
1da177e4
LT		 3580 struct ipmi_smi_msg *msg)
3581{
3582 int requeue;
3583 int chan;
3584
3585#ifdef DEBUG_MSGING
3586 int m;
3587 printk("Recv:");
e8b33617 3588 for (m = 0; m < msg->rsp_size; m++)
1da177e4
LT		 3589 printk(" %2.2x", msg->rsp[m]);
3590 printk("\n");
3591#endif
3592 if (msg->rsp_size < 2) {
3593 /* Message is too small to be correct. */
3594 printk(KERN_WARNING PFX "BMC returned to small a message"
3595 " for netfn %x cmd %x, got %d bytes\n",
3596 (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3597
3598 /* Generate an error response for the message. */
3599 msg->rsp[0] = msg->data[0] | (1 << 2);
3600 msg->rsp[1] = msg->data[1];
3601 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3602 msg->rsp_size = 3;
c70d7499
CM		 3603 } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
3604 || (msg->rsp[1] != msg->data[1])) {
3605 /*
3606 * The NetFN and Command in the response is not even
3607 * marginally correct.
3608 */
1da177e4
LT		 3609 printk(KERN_WARNING PFX "BMC returned incorrect response,"
3610 " expected netfn %x cmd %x, got netfn %x cmd %x\n",
3611 (msg->data[0] >> 2) | 1, msg->data[1],
3612 msg->rsp[0] >> 2, msg->rsp[1]);
3613
3614 /* Generate an error response for the message. */
3615 msg->rsp[0] = msg->data[0] | (1 << 2);
3616 msg->rsp[1] = msg->data[1];
3617 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3618 msg->rsp_size = 3;
3619 }
3620
3621 if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3622 && (msg->rsp[1] == IPMI_SEND_MSG_CMD)
c70d7499
CM		 3623 && (msg->user_data != NULL)) {
3624 /*
3625 * It's a response to a response we sent. For this we
3626 * deliver a send message response to the user.
3627 */
393d2cc3 3628 struct ipmi_recv_msg *recv_msg = msg->user_data;
1da177e4
LT		 3629
3630 requeue = 0;
3631 if (msg->rsp_size < 2)
3632 /* Message is too small to be correct. */
3633 goto out;
3634
3635 chan = msg->data[2] & 0x0f;
3636 if (chan >= IPMI_MAX_CHANNELS)
3637 /* Invalid channel number */
3638 goto out;
3639
393d2cc3
CM		 3640 if (!recv_msg)
3641 goto out;
3642
3643 /* Make sure the user still exists. */
3644 if (!recv_msg->user || !recv_msg->user->valid)
3645 goto out;
3646
3647 recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3648 recv_msg->msg.data = recv_msg->msg_data;
3649 recv_msg->msg.data_len = 1;
3650 recv_msg->msg_data[0] = msg->rsp[2];
3651 deliver_response(recv_msg);
1da177e4 3652 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
c70d7499 3653 && (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
1da177e4
LT		 3654 /* It's from the receive queue. */
3655 chan = msg->rsp[3] & 0xf;
3656 if (chan >= IPMI_MAX_CHANNELS) {
3657 /* Invalid channel number */
3658 requeue = 0;
3659 goto out;
3660 }
3661
4dec302f 3662 /*
9a2845c4
CM		 3663 * We need to make sure the channels have been initialized.
3664 * The channel_handler routine will set the "curr_channel"
3665 * equal to or greater than IPMI_MAX_CHANNELS when all the
3666 * channels for this interface have been initialized.
3667 */
4dec302f 3668 if (intf->curr_channel < IPMI_MAX_CHANNELS) {
9a2845c4 3669 requeue = 0; /* Throw the message away */
4dec302f 3670 goto out;
3671 }
3672
1da177e4
LT		 3673 switch (intf->channels[chan].medium) {
3674 case IPMI_CHANNEL_MEDIUM_IPMB:
3675 if (msg->rsp[4] & 0x04) {
c70d7499
CM		 3676 /*
3677 * It's a response, so find the
3678 * requesting message and send it up.
3679 */
1da177e4
LT		 3680 requeue = handle_ipmb_get_msg_rsp(intf, msg);
3681 } else {
c70d7499
CM		 3682 /*
3683 * It's a command to the SMS from some other
3684 * entity. Handle that.
3685 */
1da177e4
LT		 3686 requeue = handle_ipmb_get_msg_cmd(intf, msg);
3687 }
3688 break;
3689
3690 case IPMI_CHANNEL_MEDIUM_8023LAN:
3691 case IPMI_CHANNEL_MEDIUM_ASYNC:
3692 if (msg->rsp[6] & 0x04) {
c70d7499
CM		 3693 /*
3694 * It's a response, so find the
3695 * requesting message and send it up.
3696 */
1da177e4
LT		 3697 requeue = handle_lan_get_msg_rsp(intf, msg);
3698 } else {
c70d7499
CM		 3699 /*
3700 * It's a command to the SMS from some other
3701 * entity. Handle that.
3702 */
1da177e4
LT		 3703 requeue = handle_lan_get_msg_cmd(intf, msg);
3704 }
3705 break;
3706
3707 default:
4dec302f 3708 /* Check for OEM Channels. Clients had better
3709 register for these commands. */
3710 if ((intf->channels[chan].medium
3711 >= IPMI_CHANNEL_MEDIUM_OEM_MIN)
3712 && (intf->channels[chan].medium
3713 <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) {
3714 requeue = handle_oem_get_msg_cmd(intf, msg);
3715 } else {
3716 /*
3717 * We don't handle the channel type, so just
3718 * free the message.
3719 */
3720 requeue = 0;
3721 }
1da177e4
LT		 3722 }
3723
3724 } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
c70d7499 3725 && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
b3834be5 3726 /* It's an asynchronous event. */
1da177e4
LT		 3727 requeue = handle_read_event_rsp(intf, msg);
3728 } else {
3729 /* It's a response from the local BMC. */
3730 requeue = handle_bmc_rsp(intf, msg);
3731 }
3732
3733 out:
3734 return requeue;
3735}
3736
7adf579c
CM		 3737/*
3738 * If there are messages in the queue or pretimeouts, handle them.
3739 */
3740static void handle_new_recv_msgs(ipmi_smi_t intf)
3741{
3742 struct ipmi_smi_msg *smi_msg;
3743 unsigned long flags = 0;
3744 int rv;
3745 int run_to_completion = intf->run_to_completion;
3746
3747 /* See if any waiting messages need to be processed. */
3748 if (!run_to_completion)
3749 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3750 while (!list_empty(&intf->waiting_msgs)) {
3751 smi_msg = list_entry(intf->waiting_msgs.next,
3752 struct ipmi_smi_msg, link);
3753 list_del(&smi_msg->link);
3754 if (!run_to_completion)
3755 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3756 rv = handle_one_recv_msg(intf, smi_msg);
3757 if (!run_to_completion)
3758 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3759 if (rv == 0) {
3760 /* Message handled */
3761 ipmi_free_smi_msg(smi_msg);
3762 } else if (rv < 0) {
3763 /* Fatal error on the message, del but don't free. */
3764 } else {
3765 /*
3766 * To preserve message order, quit if we
3767 * can't handle a message.
3768 */
3769 list_add(&smi_msg->link, &intf->waiting_msgs);
3770 break;
3771 }
3772 }
3773 if (!run_to_completion)
3774 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3775
3776 /*
3777 * If the pretimout count is non-zero, decrement one from it and
3778 * deliver pretimeouts to all the users.
3779 */
3780 if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) {
3781 ipmi_user_t user;
3782
3783 rcu_read_lock();
3784 list_for_each_entry_rcu(user, &intf->users, link) {
3785 if (user->handler->ipmi_watchdog_pretimeout)
3786 user->handler->ipmi_watchdog_pretimeout(
3787 user->handler_data);
3788 }
3789 rcu_read_unlock();
3790 }
3791}
3792
3793static void smi_recv_tasklet(unsigned long val)
3794{
3795 handle_new_recv_msgs((ipmi_smi_t) val);
3796}
3797
1da177e4
LT		 3798/* Handle a new message from the lower layer. */
3799void ipmi_smi_msg_received(ipmi_smi_t intf,
3800 struct ipmi_smi_msg *msg)
3801{
5956dce1 3802 unsigned long flags = 0; /* keep us warning-free. */
5956dce1 3803 int run_to_completion;
1da177e4
LT		 3804
3805
1da177e4
LT		 3806 if ((msg->data_size >= 2)
3807 && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3808 && (msg->data[1] == IPMI_SEND_MSG_CMD)
c70d7499
CM		 3809 && (msg->user_data == NULL)) {
3810 /*
3811 * This is the local response to a command send, start
3812 * the timer for these. The user_data will not be
3813 * NULL if this is a response send, and we will let
3814 * response sends just go through.
3815 */
3816
3817 /*
3818 * Check for errors, if we get certain errors (ones
3819 * that mean basically we can try again later), we
3820 * ignore them and start the timer. Otherwise we
3821 * report the error immediately.
3822 */
1da177e4
LT		 3823 if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3824 && (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
46d52b09
CM		 3825 && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
3826 && (msg->rsp[2] != IPMI_BUS_ERR)
c70d7499 3827 && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
1da177e4
LT		 3828 int chan = msg->rsp[3] & 0xf;
3829
3830 /* Got an error sending the message, handle it. */
1da177e4
LT		 3831 if (chan >= IPMI_MAX_CHANNELS)
3832 ; /* This shouldn't happen */
3833 else if ((intf->channels[chan].medium
3834 == IPMI_CHANNEL_MEDIUM_8023LAN)
3835 || (intf->channels[chan].medium
3836 == IPMI_CHANNEL_MEDIUM_ASYNC))
b2655f26 3837 ipmi_inc_stat(intf, sent_lan_command_errs);
1da177e4 3838 else
b2655f26 3839 ipmi_inc_stat(intf, sent_ipmb_command_errs);
1da177e4 3840 intf_err_seq(intf, msg->msgid, msg->rsp[2]);
c70d7499 3841 } else
1da177e4
LT		 3842 /* The message was sent, start the timer. */
3843 intf_start_seq_timer(intf, msg->msgid);
1da177e4
LT		 3844
3845 ipmi_free_smi_msg(msg);
393d2cc3 3846 goto out;
1da177e4
LT		 3847 }
3848
c70d7499
CM		 3849 /*
3850 * To preserve message order, if the list is not empty, we
3851 * tack this message onto the end of the list.
3852 */
5956dce1
KB		 3853 run_to_completion = intf->run_to_completion;
3854 if (!run_to_completion)
3855 spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
7adf579c 3856 list_add_tail(&msg->link, &intf->waiting_msgs);
5956dce1
KB		 3857 if (!run_to_completion)
3858 spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
c70d7499 3859
7adf579c 3860 tasklet_schedule(&intf->recv_tasklet);
393d2cc3
CM		 3861 out:
3862 return;
1da177e4 3863}
c70d7499 3864EXPORT_SYMBOL(ipmi_smi_msg_received);
1da177e4
LT		 3865
3866void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3867{
7adf579c
CM		 3868 atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1);
3869 tasklet_schedule(&intf->recv_tasklet);
1da177e4 3870}
c70d7499 3871EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
1da177e4 3872
882fe011
CM		 3873static struct ipmi_smi_msg *
3874smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3875 unsigned char seq, long seqid)
1da177e4 3876{
882fe011 3877 struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
1da177e4 3878 if (!smi_msg)
c70d7499
CM		 3879 /*
3880 * If we can't allocate the message, then just return, we
3881 * get 4 retries, so this should be ok.
3882 */
882fe011 3883 return NULL;
1da177e4
LT		 3884
3885 memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3886 smi_msg->data_size = recv_msg->msg.data_len;
3887 smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
c70d7499 3888
1da177e4
LT		 3889#ifdef DEBUG_MSGING
3890 {
3891 int m;
3892 printk("Resend: ");
e8b33617 3893 for (m = 0; m < smi_msg->data_size; m++)
1da177e4
LT		 3894 printk(" %2.2x", smi_msg->data[m]);
3895 printk("\n");
3896 }
3897#endif
882fe011 3898 return smi_msg;
1da177e4
LT		 3899}
3900
393d2cc3
CM		 3901static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3902 struct list_head *timeouts, long timeout_period,
89986496
CM		 3903 int slot, unsigned long *flags,
3904 unsigned int *waiting_msgs)
393d2cc3 3905{
b2c03941
CM		 3906 struct ipmi_recv_msg *msg;
3907 struct ipmi_smi_handlers *handlers;
3908
3909 if (intf->intf_num == -1)
3910 return;
393d2cc3
CM		 3911
3912 if (!ent->inuse)
3913 return;
3914
3915 ent->timeout -= timeout_period;
89986496
CM		 3916 if (ent->timeout > 0) {
3917 (*waiting_msgs)++;
393d2cc3 3918 return;
89986496 3919 }
393d2cc3
CM		 3920
3921 if (ent->retries_left == 0) {
3922 /* The message has used all its retries. */
3923 ent->inuse = 0;
3924 msg = ent->recv_msg;
3925 list_add_tail(&msg->link, timeouts);
393d2cc3 3926 if (ent->broadcast)
b2655f26 3927 ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
25176ed6 3928 else if (is_lan_addr(&ent->recv_msg->addr))
b2655f26 3929 ipmi_inc_stat(intf, timed_out_lan_commands);
393d2cc3 3930 else
b2655f26 3931 ipmi_inc_stat(intf, timed_out_ipmb_commands);
393d2cc3
CM		 3932 } else {
3933 struct ipmi_smi_msg *smi_msg;
3934 /* More retries, send again. */
3935
89986496
CM		 3936 (*waiting_msgs)++;
3937
c70d7499
CM		 3938 /*
3939 * Start with the max timer, set to normal timer after
3940 * the message is sent.
3941 */
393d2cc3
CM		 3942 ent->timeout = MAX_MSG_TIMEOUT;
3943 ent->retries_left--;
393d2cc3
CM		 3944 smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3945 ent->seqid);
25176ed6
CM		 3946 if (!smi_msg) {
3947 if (is_lan_addr(&ent->recv_msg->addr))
3948 ipmi_inc_stat(intf,
3949 dropped_rexmit_lan_commands);
3950 else
3951 ipmi_inc_stat(intf,
3952 dropped_rexmit_ipmb_commands);
393d2cc3 3953 return;
25176ed6 3954 }
393d2cc3
CM		 3955
3956 spin_unlock_irqrestore(&intf->seq_lock, *flags);
b2c03941 3957
c70d7499
CM		 3958 /*
3959 * Send the new message. We send with a zero
3960 * priority. It timed out, I doubt time is that
3961 * critical now, and high priority messages are really
3962 * only for messages to the local MC, which don't get
3963 * resent.
3964 */
b2c03941 3965 handlers = intf->handlers;
25176ed6
CM		 3966 if (handlers) {
3967 if (is_lan_addr(&ent->recv_msg->addr))
3968 ipmi_inc_stat(intf,
3969 retransmitted_lan_commands);
3970 else
3971 ipmi_inc_stat(intf,
3972 retransmitted_ipmb_commands);
3973
b2c03941
CM		 3974 intf->handlers->sender(intf->send_info,
3975 smi_msg, 0);
25176ed6 3976 } else
b2c03941
CM		 3977 ipmi_free_smi_msg(smi_msg);
3978
393d2cc3
CM		 3979 spin_lock_irqsave(&intf->seq_lock, *flags);
3980 }
3981}
3982
89986496 3983static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
1da177e4 3984{
1da177e4
LT		 3985 struct list_head timeouts;
3986 struct ipmi_recv_msg *msg, *msg2;
1da177e4 3987 unsigned long flags;
bca0324d 3988 int i;
89986496 3989 unsigned int waiting_msgs = 0;
1da177e4 3990
89986496
CM		 3991 /*
3992 * Go through the seq table and find any messages that
3993 * have timed out, putting them in the timeouts
3994 * list.
3995 */
3996 INIT_LIST_HEAD(&timeouts);
3997 spin_lock_irqsave(&intf->seq_lock, flags);
3998 for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
3999 check_msg_timeout(intf, &(intf->seq_table[i]),
4000 &timeouts, timeout_period, i,
4001 &flags, &waiting_msgs);
4002 spin_unlock_irqrestore(&intf->seq_lock, flags);
393d2cc3 4003
89986496
CM		 4004 list_for_each_entry_safe(msg, msg2, &timeouts, link)
4005 deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
b9675136 4006
89986496
CM		 4007 /*
4008 * Maintenance mode handling. Check the timeout
4009 * optimistically before we claim the lock. It may
4010 * mean a timeout gets missed occasionally, but that
4011 * only means the timeout gets extended by one period
4012 * in that case. No big deal, and it avoids the lock
4013 * most of the time.
4014 */
4015 if (intf->auto_maintenance_timeout > 0) {
4016 spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
b9675136 4017 if (intf->auto_maintenance_timeout > 0) {
89986496
CM		 4018 intf->auto_maintenance_timeout
4019 -= timeout_period;
4020 if (!intf->maintenance_mode
4021 && (intf->auto_maintenance_timeout <= 0)) {
7aefac26 4022 intf->maintenance_mode_enable = false;
89986496 4023 maintenance_mode_update(intf);
b9675136 4024 }
b9675136 4025 }
89986496
CM		 4026 spin_unlock_irqrestore(&intf->maintenance_mode_lock,
4027 flags);
1da177e4 4028 }
89986496
CM		 4029
4030 tasklet_schedule(&intf->recv_tasklet);
4031
4032 return waiting_msgs;
1da177e4
LT		 4033}
4034
89986496 4035static void ipmi_request_event(ipmi_smi_t intf)
1da177e4 4036{
b2c03941 4037 struct ipmi_smi_handlers *handlers;
1da177e4 4038
89986496
CM		 4039 /* No event requests when in maintenance mode. */
4040 if (intf->maintenance_mode_enable)
4041 return;
b9675136 4042
89986496
CM		 4043 handlers = intf->handlers;
4044 if (handlers)
4045 handlers->request_events(intf->send_info);
1da177e4
LT		 4046}
4047
4048static struct timer_list ipmi_timer;
4049
8f43f84f 4050static atomic_t stop_operation;
1da177e4
LT		 4051
4052static void ipmi_timeout(unsigned long data)
4053{
89986496
CM		 4054 ipmi_smi_t intf;
4055 int nt = 0;
4056
8f43f84f 4057 if (atomic_read(&stop_operation))
1da177e4 4058 return;
1da177e4 4059
89986496
CM		 4060 rcu_read_lock();
4061 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4062 int lnt = 0;
4063
4064 if (atomic_read(&intf->event_waiters)) {
4065 intf->ticks_to_req_ev--;
4066 if (intf->ticks_to_req_ev == 0) {
4067 ipmi_request_event(intf);
4068 intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
4069 }
4070 lnt++;
4071 }
4072
4073 lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
1da177e4 4074
89986496
CM		 4075 lnt = !!lnt;
4076 if (lnt != intf->last_needs_timer &&
4077 intf->handlers->set_need_watch)
4078 intf->handlers->set_need_watch(intf->send_info, lnt);
4079 intf->last_needs_timer = lnt;
1da177e4 4080
89986496
CM		 4081 nt += lnt;
4082 }
4083 rcu_read_unlock();
4084
4085 if (nt)
4086 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
1da177e4
LT		 4087}
4088
89986496
CM		 4089static void need_waiter(ipmi_smi_t intf)
4090{
4091 /* Racy, but worst case we start the timer twice. */
4092 if (!timer_pending(&ipmi_timer))
4093 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4094}
1da177e4
LT		 4095
4096static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
4097static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
4098
4099/* FIXME - convert these to slabs. */
4100static void free_smi_msg(struct ipmi_smi_msg *msg)
4101{
4102 atomic_dec(&smi_msg_inuse_count);
4103 kfree(msg);
4104}
4105
4106struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
4107{
4108 struct ipmi_smi_msg *rv;
4109 rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
4110 if (rv) {
4111 rv->done = free_smi_msg;
4112 rv->user_data = NULL;
4113 atomic_inc(&smi_msg_inuse_count);
4114 }
4115 return rv;
4116}
c70d7499 4117EXPORT_SYMBOL(ipmi_alloc_smi_msg);
1da177e4
LT		 4118
4119static void free_recv_msg(struct ipmi_recv_msg *msg)
4120{
4121 atomic_dec(&recv_msg_inuse_count);
4122 kfree(msg);
4123}
4124
74006309 4125static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
1da177e4
LT		 4126{
4127 struct ipmi_recv_msg *rv;
4128
4129 rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
4130 if (rv) {
a9eec556 4131 rv->user = NULL;
1da177e4
LT		 4132 rv->done = free_recv_msg;
4133 atomic_inc(&recv_msg_inuse_count);
4134 }
4135 return rv;
4136}
4137
393d2cc3
CM		 4138void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
4139{
4140 if (msg->user)
4141 kref_put(&msg->user->refcount, free_user);
4142 msg->done(msg);
4143}
c70d7499 4144EXPORT_SYMBOL(ipmi_free_recv_msg);
393d2cc3 4145
1da177e4
LT		 4146#ifdef CONFIG_IPMI_PANIC_EVENT
4147
895dcfd1
CM		 4148static atomic_t panic_done_count = ATOMIC_INIT(0);
4149
1da177e4
LT		 4150static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
4151{
895dcfd1 4152 atomic_dec(&panic_done_count);
1da177e4
LT		 4153}
4154
4155static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
4156{
895dcfd1
CM		 4157 atomic_dec(&panic_done_count);
4158}
4159
4160/*
4161 * Inside a panic, send a message and wait for a response.
4162 */
4163static void ipmi_panic_request_and_wait(ipmi_smi_t intf,
4164 struct ipmi_addr *addr,
4165 struct kernel_ipmi_msg *msg)
4166{
4167 struct ipmi_smi_msg smi_msg;
4168 struct ipmi_recv_msg recv_msg;
4169 int rv;
4170
4171 smi_msg.done = dummy_smi_done_handler;
4172 recv_msg.done = dummy_recv_done_handler;
4173 atomic_add(2, &panic_done_count);
4174 rv = i_ipmi_request(NULL,
4175 intf,
4176 addr,
4177 0,
4178 msg,
4179 intf,
4180 &smi_msg,
4181 &recv_msg,
4182 0,
4183 intf->channels[0].address,
4184 intf->channels[0].lun,
4185 0, 1); /* Don't retry, and don't wait. */
4186 if (rv)
4187 atomic_sub(2, &panic_done_count);
4188 while (atomic_read(&panic_done_count) != 0)
4189 ipmi_poll(intf);
1da177e4
LT		 4190}
4191
4192#ifdef CONFIG_IPMI_PANIC_STRING
56a55ec6 4193static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4 4194{
56a55ec6
CM		 4195 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4196 && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
4197 && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
c70d7499 4198 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
1da177e4 4199 /* A get event receiver command, save it. */
56a55ec6
CM		 4200 intf->event_receiver = msg->msg.data[1];
4201 intf->event_receiver_lun = msg->msg.data[2] & 0x3;
1da177e4
LT		 4202 }
4203}
4204
56a55ec6 4205static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
1da177e4 4206{
56a55ec6
CM		 4207 if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4208 && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
4209 && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
c70d7499
CM		 4210 && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
4211 /*
4212 * A get device id command, save if we are an event
4213 * receiver or generator.
4214 */
56a55ec6
CM		 4215 intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
4216 intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
1da177e4
LT		 4217 }
4218}
4219#endif
4220
4221static void send_panic_events(char *str)
4222{
4223 struct kernel_ipmi_msg msg;
4224 ipmi_smi_t intf;
4225 unsigned char data[16];
1da177e4
LT		 4226 struct ipmi_system_interface_addr *si;
4227 struct ipmi_addr addr;
1da177e4
LT		 4228
4229 si = (struct ipmi_system_interface_addr *) &addr;
4230 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4231 si->channel = IPMI_BMC_CHANNEL;
4232 si->lun = 0;
4233
4234 /* Fill in an event telling that we have failed. */
4235 msg.netfn = 0x04; /* Sensor or Event. */
4236 msg.cmd = 2; /* Platform event command. */
4237 msg.data = data;
4238 msg.data_len = 8;
cda315ab 4239 data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
1da177e4
LT		 4240 data[1] = 0x03; /* This is for IPMI 1.0. */
4241 data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
4242 data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
4243 data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
4244
c70d7499
CM		 4245 /*
4246 * Put a few breadcrumbs in. Hopefully later we can add more things
4247 * to make the panic events more useful.
4248 */
1da177e4
LT		 4249 if (str) {
4250 data[3] = str[0];
4251 data[6] = str[1];
4252 data[7] = str[2];
4253 }
4254
1da177e4 4255 /* For every registered interface, send the event. */
bca0324d 4256 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
b2c03941
CM		 4257 if (!intf->handlers)
4258 /* Interface is not ready. */
1da177e4
LT		 4259 continue;
4260
5956dce1 4261 intf->run_to_completion = 1;
1da177e4
LT		 4262 /* Send the event announcing the panic. */
4263 intf->handlers->set_run_to_completion(intf->send_info, 1);
895dcfd1 4264 ipmi_panic_request_and_wait(intf, &addr, &msg);
1da177e4
LT		 4265 }
4266
4267#ifdef CONFIG_IPMI_PANIC_STRING
c70d7499
CM		 4268 /*
4269 * On every interface, dump a bunch of OEM event holding the
4270 * string.
4271 */
4272 if (!str)
1da177e4
LT		 4273 return;
4274
bca0324d
CM		 4275 /* For every registered interface, send the event. */
4276 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
1da177e4
LT		 4277 char *p = str;
4278 struct ipmi_ipmb_addr *ipmb;
4279 int j;
4280
bca0324d
CM		 4281 if (intf->intf_num == -1)
4282 /* Interface was not ready yet. */
1da177e4
LT		 4283 continue;
4284
78ba2faf
CM		 4285 /*
4286 * intf_num is used as an marker to tell if the
4287 * interface is valid. Thus we need a read barrier to
4288 * make sure data fetched before checking intf_num
4289 * won't be used.
4290 */
4291 smp_rmb();
4292
c70d7499
CM		 4293 /*
4294 * First job here is to figure out where to send the
4295 * OEM events. There's no way in IPMI to send OEM
4296 * events using an event send command, so we have to
4297 * find the SEL to put them in and stick them in
4298 * there.
4299 */
1da177e4
LT		 4300
4301 /* Get capabilities from the get device id. */
4302 intf->local_sel_device = 0;
4303 intf->local_event_generator = 0;
4304 intf->event_receiver = 0;
4305
4306 /* Request the device info from the local MC. */
4307 msg.netfn = IPMI_NETFN_APP_REQUEST;
4308 msg.cmd = IPMI_GET_DEVICE_ID_CMD;
4309 msg.data = NULL;
4310 msg.data_len = 0;
4311 intf->null_user_handler = device_id_fetcher;
895dcfd1 4312 ipmi_panic_request_and_wait(intf, &addr, &msg);
1da177e4
LT		 4313
4314 if (intf->local_event_generator) {
4315 /* Request the event receiver from the local MC. */
4316 msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
4317 msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
4318 msg.data = NULL;
4319 msg.data_len = 0;
4320 intf->null_user_handler = event_receiver_fetcher;
895dcfd1 4321 ipmi_panic_request_and_wait(intf, &addr, &msg);
1da177e4
LT		 4322 }
4323 intf->null_user_handler = NULL;
4324
c70d7499
CM		 4325 /*
4326 * Validate the event receiver. The low bit must not
4327 * be 1 (it must be a valid IPMB address), it cannot
4328 * be zero, and it must not be my address.
4329 */
4330 if (((intf->event_receiver & 1) == 0)
1da177e4 4331 && (intf->event_receiver != 0)
c70d7499
CM		 4332 && (intf->event_receiver != intf->channels[0].address)) {
4333 /*
4334 * The event receiver is valid, send an IPMB
4335 * message.
4336 */
1da177e4
LT		 4337 ipmb = (struct ipmi_ipmb_addr *) &addr;
4338 ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
4339 ipmb->channel = 0; /* FIXME - is this right? */
4340 ipmb->lun = intf->event_receiver_lun;
4341 ipmb->slave_addr = intf->event_receiver;
4342 } else if (intf->local_sel_device) {
c70d7499
CM		 4343 /*
4344 * The event receiver was not valid (or was
4345 * me), but I am an SEL device, just dump it
4346 * in my SEL.
4347 */
1da177e4
LT		 4348 si = (struct ipmi_system_interface_addr *) &addr;
4349 si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4350 si->channel = IPMI_BMC_CHANNEL;
4351 si->lun = 0;
4352 } else
4353 continue; /* No where to send the event. */
4354
1da177e4
LT		 4355 msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
4356 msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
4357 msg.data = data;
4358 msg.data_len = 16;
4359
4360 j = 0;
4361 while (*p) {
4362 int size = strlen(p);
4363
4364 if (size > 11)
4365 size = 11;
4366 data[0] = 0;
4367 data[1] = 0;
4368 data[2] = 0xf0; /* OEM event without timestamp. */
c14979b9 4369 data[3] = intf->channels[0].address;
1da177e4 4370 data[4] = j++; /* sequence # */
c70d7499
CM		 4371 /*
4372 * Always give 11 bytes, so strncpy will fill
4373 * it with zeroes for me.
4374 */
1da177e4
LT		 4375 strncpy(data+5, p, 11);
4376 p += size;
4377
895dcfd1 4378 ipmi_panic_request_and_wait(intf, &addr, &msg);
1da177e4 4379 }
c70d7499 4380 }
1da177e4
LT		 4381#endif /* CONFIG_IPMI_PANIC_STRING */
4382}
4383#endif /* CONFIG_IPMI_PANIC_EVENT */
4384
0c8204b3 4385static int has_panicked;
1da177e4
LT		 4386
4387static int panic_event(struct notifier_block *this,
4388 unsigned long event,
c70d7499 4389 void *ptr)
1da177e4 4390{
1da177e4
LT		 4391 ipmi_smi_t intf;
4392
f18190bd 4393 if (has_panicked)
1da177e4 4394 return NOTIFY_DONE;
f18190bd 4395 has_panicked = 1;
1da177e4
LT		 4396
4397 /* For every registered interface, set it to run to completion. */
bca0324d 4398 list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
b2c03941
CM		 4399 if (!intf->handlers)
4400 /* Interface is not ready. */
1da177e4
LT		 4401 continue;
4402
5956dce1 4403 intf->run_to_completion = 1;
1da177e4
LT		 4404 intf->handlers->set_run_to_completion(intf->send_info, 1);
4405 }
4406
4407#ifdef CONFIG_IPMI_PANIC_EVENT
4408 send_panic_events(ptr);
4409#endif
4410
4411 return NOTIFY_DONE;
4412}
4413
4414static struct notifier_block panic_block = {
4415 .notifier_call = panic_event,
4416 .next = NULL,
4417 .priority = 200 /* priority: INT_MAX >= x >= 0 */
4418};
4419
4420static int ipmi_init_msghandler(void)
4421{
50c812b2 4422 int rv;
1da177e4
LT		 4423
4424 if (initialized)
4425 return 0;
4426
fe2d5ffc 4427 rv = driver_register(&ipmidriver.driver);
50c812b2
CM		 4428 if (rv) {
4429 printk(KERN_ERR PFX "Could not register IPMI driver\n");
4430 return rv;
4431 }
4432
1da177e4 4433 printk(KERN_INFO "ipmi message handler version "
1fdd75bd 4434 IPMI_DRIVER_VERSION "\n");
1da177e4 4435
3b625943 4436#ifdef CONFIG_PROC_FS
1da177e4
LT		 4437 proc_ipmi_root = proc_mkdir("ipmi", NULL);
4438 if (!proc_ipmi_root) {
4439 printk(KERN_ERR PFX "Unable to create IPMI proc dir");
80fad5b9 4440 driver_unregister(&ipmidriver.driver);
1da177e4
LT		 4441 return -ENOMEM;
4442 }
4443
3b625943 4444#endif /* CONFIG_PROC_FS */
1da177e4 4445
409035e0
CM		 4446 setup_timer(&ipmi_timer, ipmi_timeout, 0);
4447 mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
1da177e4 4448
e041c683 4449 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
1da177e4
LT		 4450
4451 initialized = 1;
4452
4453 return 0;
4454}
4455
60ee6d5f 4456static int __init ipmi_init_msghandler_mod(void)
1da177e4
LT		 4457{
4458 ipmi_init_msghandler();
4459 return 0;
4460}
4461
60ee6d5f 4462static void __exit cleanup_ipmi(void)
1da177e4
LT		 4463{
4464 int count;
4465
4466 if (!initialized)
4467 return;
4468
e041c683 4469 atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
1da177e4 4470
c70d7499
CM		 4471 /*
4472 * This can't be called if any interfaces exist, so no worry
4473 * about shutting down the interfaces.
4474 */
1da177e4 4475
c70d7499
CM		 4476 /*
4477 * Tell the timer to stop, then wait for it to stop. This
4478 * avoids problems with race conditions removing the timer
4479 * here.
4480 */
8f43f84f
CM		 4481 atomic_inc(&stop_operation);
4482 del_timer_sync(&ipmi_timer);
1da177e4 4483
3b625943 4484#ifdef CONFIG_PROC_FS
a8ca16ea 4485 proc_remove(proc_ipmi_root);
3b625943 4486#endif /* CONFIG_PROC_FS */
1da177e4 4487
fe2d5ffc 4488 driver_unregister(&ipmidriver.driver);
50c812b2 4489
1da177e4
LT		 4490 initialized = 0;
4491
4492 /* Check for buffer leaks. */
4493 count = atomic_read(&smi_msg_inuse_count);
4494 if (count != 0)
4495 printk(KERN_WARNING PFX "SMI message count %d at exit\n",
4496 count);
4497 count = atomic_read(&recv_msg_inuse_count);
4498 if (count != 0)
4499 printk(KERN_WARNING PFX "recv message count %d at exit\n",
4500 count);
4501}
4502module_exit(cleanup_ipmi);
4503
4504module_init(ipmi_init_msghandler_mod);
4505MODULE_LICENSE("GPL");
1fdd75bd 4506MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
c70d7499
CM		 4507MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
4508 " interface.");
1fdd75bd 4509MODULE_VERSION(IPMI_DRIVER_VERSION);
Linux kernel - Deliverables
This page took 1.136789 seconds and 5 git commands to generate.