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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 | ||
34 | #include <linux/config.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/errno.h> | |
37 | #include <asm/system.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/poll.h> | |
40 | #include <linux/spinlock.h> | |
41 | #include <linux/rwsem.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/ipmi.h> | |
44 | #include <linux/ipmi_smi.h> | |
45 | #include <linux/notifier.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/proc_fs.h> | |
48 | ||
49 | #define PFX "IPMI message handler: " | |
50 | #define IPMI_MSGHANDLER_VERSION "v33" | |
51 | ||
52 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
53 | static int ipmi_init_msghandler(void); | |
54 | ||
55 | static int initialized = 0; | |
56 | ||
3b625943 CM |
57 | #ifdef CONFIG_PROC_FS |
58 | struct proc_dir_entry *proc_ipmi_root = NULL; | |
59 | #endif /* CONFIG_PROC_FS */ | |
1da177e4 LT |
60 | |
61 | #define MAX_EVENTS_IN_QUEUE 25 | |
62 | ||
63 | /* Don't let a message sit in a queue forever, always time it with at lest | |
64 | the max message timer. This is in milliseconds. */ | |
65 | #define MAX_MSG_TIMEOUT 60000 | |
66 | ||
67 | struct ipmi_user | |
68 | { | |
69 | struct list_head link; | |
70 | ||
71 | /* The upper layer that handles receive messages. */ | |
72 | struct ipmi_user_hndl *handler; | |
73 | void *handler_data; | |
74 | ||
75 | /* The interface this user is bound to. */ | |
76 | ipmi_smi_t intf; | |
77 | ||
78 | /* Does this interface receive IPMI events? */ | |
79 | int gets_events; | |
80 | }; | |
81 | ||
82 | struct cmd_rcvr | |
83 | { | |
84 | struct list_head link; | |
85 | ||
86 | ipmi_user_t user; | |
87 | unsigned char netfn; | |
88 | unsigned char cmd; | |
89 | }; | |
90 | ||
91 | struct seq_table | |
92 | { | |
93 | unsigned int inuse : 1; | |
94 | unsigned int broadcast : 1; | |
95 | ||
96 | unsigned long timeout; | |
97 | unsigned long orig_timeout; | |
98 | unsigned int retries_left; | |
99 | ||
100 | /* To verify on an incoming send message response that this is | |
101 | the message that the response is for, we keep a sequence id | |
102 | and increment it every time we send a message. */ | |
103 | long seqid; | |
104 | ||
105 | /* This is held so we can properly respond to the message on a | |
106 | timeout, and it is used to hold the temporary data for | |
107 | retransmission, too. */ | |
108 | struct ipmi_recv_msg *recv_msg; | |
109 | }; | |
110 | ||
111 | /* Store the information in a msgid (long) to allow us to find a | |
112 | sequence table entry from the msgid. */ | |
113 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) | |
114 | ||
115 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
116 | do { \ | |
117 | seq = ((msgid >> 26) & 0x3f); \ | |
118 | seqid = (msgid & 0x3fffff); \ | |
119 | } while(0) | |
120 | ||
121 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) | |
122 | ||
123 | struct ipmi_channel | |
124 | { | |
125 | unsigned char medium; | |
126 | unsigned char protocol; | |
127 | }; | |
128 | ||
3b625943 | 129 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
130 | struct ipmi_proc_entry |
131 | { | |
132 | char *name; | |
133 | struct ipmi_proc_entry *next; | |
134 | }; | |
3b625943 | 135 | #endif |
1da177e4 LT |
136 | |
137 | #define IPMI_IPMB_NUM_SEQ 64 | |
138 | #define IPMI_MAX_CHANNELS 8 | |
139 | struct ipmi_smi | |
140 | { | |
141 | /* What interface number are we? */ | |
142 | int intf_num; | |
143 | ||
144 | /* The list of upper layers that are using me. We read-lock | |
145 | this when delivering messages to the upper layer to keep | |
146 | the user from going away while we are processing the | |
147 | message. This means that you cannot add or delete a user | |
148 | from the receive callback. */ | |
149 | rwlock_t users_lock; | |
150 | struct list_head users; | |
151 | ||
152 | /* Used for wake ups at startup. */ | |
153 | wait_queue_head_t waitq; | |
154 | ||
155 | /* The IPMI version of the BMC on the other end. */ | |
156 | unsigned char version_major; | |
157 | unsigned char version_minor; | |
158 | ||
159 | /* This is the lower-layer's sender routine. */ | |
160 | struct ipmi_smi_handlers *handlers; | |
161 | void *send_info; | |
162 | ||
3b625943 | 163 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
164 | /* A list of proc entries for this interface. This does not |
165 | need a lock, only one thread creates it and only one thread | |
166 | destroys it. */ | |
3b625943 | 167 | spinlock_t proc_entry_lock; |
1da177e4 | 168 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 169 | #endif |
1da177e4 LT |
170 | |
171 | /* A table of sequence numbers for this interface. We use the | |
172 | sequence numbers for IPMB messages that go out of the | |
173 | interface to match them up with their responses. A routine | |
174 | is called periodically to time the items in this list. */ | |
175 | spinlock_t seq_lock; | |
176 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
177 | int curr_seq; | |
178 | ||
179 | /* Messages that were delayed for some reason (out of memory, | |
180 | for instance), will go in here to be processed later in a | |
181 | periodic timer interrupt. */ | |
182 | spinlock_t waiting_msgs_lock; | |
183 | struct list_head waiting_msgs; | |
184 | ||
185 | /* The list of command receivers that are registered for commands | |
186 | on this interface. */ | |
187 | rwlock_t cmd_rcvr_lock; | |
188 | struct list_head cmd_rcvrs; | |
189 | ||
190 | /* Events that were queues because no one was there to receive | |
191 | them. */ | |
192 | spinlock_t events_lock; /* For dealing with event stuff. */ | |
193 | struct list_head waiting_events; | |
194 | unsigned int waiting_events_count; /* How many events in queue? */ | |
195 | ||
196 | /* This will be non-null if someone registers to receive all | |
197 | IPMI commands (this is for interface emulation). There | |
198 | may not be any things in the cmd_rcvrs list above when | |
199 | this is registered. */ | |
200 | ipmi_user_t all_cmd_rcvr; | |
201 | ||
202 | /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
203 | but may be changed by the user. */ | |
204 | unsigned char my_address; | |
205 | ||
206 | /* My LUN. This should generally stay the SMS LUN, but just in | |
207 | case... */ | |
208 | unsigned char my_lun; | |
209 | ||
210 | /* The event receiver for my BMC, only really used at panic | |
211 | shutdown as a place to store this. */ | |
212 | unsigned char event_receiver; | |
213 | unsigned char event_receiver_lun; | |
214 | unsigned char local_sel_device; | |
215 | unsigned char local_event_generator; | |
216 | ||
217 | /* A cheap hack, if this is non-null and a message to an | |
218 | interface comes in with a NULL user, call this routine with | |
219 | it. Note that the message will still be freed by the | |
220 | caller. This only works on the system interface. */ | |
221 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_smi_msg *msg); | |
222 | ||
223 | /* When we are scanning the channels for an SMI, this will | |
224 | tell which channel we are scanning. */ | |
225 | int curr_channel; | |
226 | ||
227 | /* Channel information */ | |
228 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
229 | ||
230 | /* Proc FS stuff. */ | |
231 | struct proc_dir_entry *proc_dir; | |
232 | char proc_dir_name[10]; | |
233 | ||
234 | spinlock_t counter_lock; /* For making counters atomic. */ | |
235 | ||
236 | /* Commands we got that were invalid. */ | |
237 | unsigned int sent_invalid_commands; | |
238 | ||
239 | /* Commands we sent to the MC. */ | |
240 | unsigned int sent_local_commands; | |
241 | /* Responses from the MC that were delivered to a user. */ | |
242 | unsigned int handled_local_responses; | |
243 | /* Responses from the MC that were not delivered to a user. */ | |
244 | unsigned int unhandled_local_responses; | |
245 | ||
246 | /* Commands we sent out to the IPMB bus. */ | |
247 | unsigned int sent_ipmb_commands; | |
248 | /* Commands sent on the IPMB that had errors on the SEND CMD */ | |
249 | unsigned int sent_ipmb_command_errs; | |
250 | /* Each retransmit increments this count. */ | |
251 | unsigned int retransmitted_ipmb_commands; | |
252 | /* When a message times out (runs out of retransmits) this is | |
253 | incremented. */ | |
254 | unsigned int timed_out_ipmb_commands; | |
255 | ||
256 | /* This is like above, but for broadcasts. Broadcasts are | |
257 | *not* included in the above count (they are expected to | |
258 | time out). */ | |
259 | unsigned int timed_out_ipmb_broadcasts; | |
260 | ||
261 | /* Responses I have sent to the IPMB bus. */ | |
262 | unsigned int sent_ipmb_responses; | |
263 | ||
264 | /* The response was delivered to the user. */ | |
265 | unsigned int handled_ipmb_responses; | |
266 | /* The response had invalid data in it. */ | |
267 | unsigned int invalid_ipmb_responses; | |
268 | /* The response didn't have anyone waiting for it. */ | |
269 | unsigned int unhandled_ipmb_responses; | |
270 | ||
271 | /* Commands we sent out to the IPMB bus. */ | |
272 | unsigned int sent_lan_commands; | |
273 | /* Commands sent on the IPMB that had errors on the SEND CMD */ | |
274 | unsigned int sent_lan_command_errs; | |
275 | /* Each retransmit increments this count. */ | |
276 | unsigned int retransmitted_lan_commands; | |
277 | /* When a message times out (runs out of retransmits) this is | |
278 | incremented. */ | |
279 | unsigned int timed_out_lan_commands; | |
280 | ||
281 | /* Responses I have sent to the IPMB bus. */ | |
282 | unsigned int sent_lan_responses; | |
283 | ||
284 | /* The response was delivered to the user. */ | |
285 | unsigned int handled_lan_responses; | |
286 | /* The response had invalid data in it. */ | |
287 | unsigned int invalid_lan_responses; | |
288 | /* The response didn't have anyone waiting for it. */ | |
289 | unsigned int unhandled_lan_responses; | |
290 | ||
291 | /* The command was delivered to the user. */ | |
292 | unsigned int handled_commands; | |
293 | /* The command had invalid data in it. */ | |
294 | unsigned int invalid_commands; | |
295 | /* The command didn't have anyone waiting for it. */ | |
296 | unsigned int unhandled_commands; | |
297 | ||
298 | /* Invalid data in an event. */ | |
299 | unsigned int invalid_events; | |
300 | /* Events that were received with the proper format. */ | |
301 | unsigned int events; | |
302 | }; | |
303 | ||
304 | #define MAX_IPMI_INTERFACES 4 | |
305 | static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES]; | |
306 | ||
307 | /* Used to keep interfaces from going away while operations are | |
308 | operating on interfaces. Grab read if you are not modifying the | |
309 | interfaces, write if you are. */ | |
310 | static DECLARE_RWSEM(interfaces_sem); | |
311 | ||
312 | /* Directly protects the ipmi_interfaces data structure. This is | |
313 | claimed in the timer interrupt. */ | |
314 | static DEFINE_SPINLOCK(interfaces_lock); | |
315 | ||
316 | /* List of watchers that want to know when smi's are added and | |
317 | deleted. */ | |
318 | static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers); | |
319 | static DECLARE_RWSEM(smi_watchers_sem); | |
320 | ||
321 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) | |
322 | { | |
323 | int i; | |
324 | ||
325 | down_read(&interfaces_sem); | |
326 | down_write(&smi_watchers_sem); | |
327 | list_add(&(watcher->link), &smi_watchers); | |
328 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
329 | if (ipmi_interfaces[i] != NULL) { | |
330 | watcher->new_smi(i); | |
331 | } | |
332 | } | |
333 | up_write(&smi_watchers_sem); | |
334 | up_read(&interfaces_sem); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
339 | { | |
340 | down_write(&smi_watchers_sem); | |
341 | list_del(&(watcher->link)); | |
342 | up_write(&smi_watchers_sem); | |
343 | return 0; | |
344 | } | |
345 | ||
346 | static void | |
347 | call_smi_watchers(int i) | |
348 | { | |
349 | struct ipmi_smi_watcher *w; | |
350 | ||
351 | down_read(&smi_watchers_sem); | |
352 | list_for_each_entry(w, &smi_watchers, link) { | |
353 | if (try_module_get(w->owner)) { | |
354 | w->new_smi(i); | |
355 | module_put(w->owner); | |
356 | } | |
357 | } | |
358 | up_read(&smi_watchers_sem); | |
359 | } | |
360 | ||
361 | static int | |
362 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
363 | { | |
364 | if (addr1->addr_type != addr2->addr_type) | |
365 | return 0; | |
366 | ||
367 | if (addr1->channel != addr2->channel) | |
368 | return 0; | |
369 | ||
370 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
371 | struct ipmi_system_interface_addr *smi_addr1 | |
372 | = (struct ipmi_system_interface_addr *) addr1; | |
373 | struct ipmi_system_interface_addr *smi_addr2 | |
374 | = (struct ipmi_system_interface_addr *) addr2; | |
375 | return (smi_addr1->lun == smi_addr2->lun); | |
376 | } | |
377 | ||
378 | if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) | |
379 | || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
380 | { | |
381 | struct ipmi_ipmb_addr *ipmb_addr1 | |
382 | = (struct ipmi_ipmb_addr *) addr1; | |
383 | struct ipmi_ipmb_addr *ipmb_addr2 | |
384 | = (struct ipmi_ipmb_addr *) addr2; | |
385 | ||
386 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
387 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
388 | } | |
389 | ||
390 | if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { | |
391 | struct ipmi_lan_addr *lan_addr1 | |
392 | = (struct ipmi_lan_addr *) addr1; | |
393 | struct ipmi_lan_addr *lan_addr2 | |
394 | = (struct ipmi_lan_addr *) addr2; | |
395 | ||
396 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
397 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
398 | && (lan_addr1->session_handle | |
399 | == lan_addr2->session_handle) | |
400 | && (lan_addr1->lun == lan_addr2->lun)); | |
401 | } | |
402 | ||
403 | return 1; | |
404 | } | |
405 | ||
406 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
407 | { | |
408 | if (len < sizeof(struct ipmi_system_interface_addr)) { | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
413 | if (addr->channel != IPMI_BMC_CHANNEL) | |
414 | return -EINVAL; | |
415 | return 0; | |
416 | } | |
417 | ||
418 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
419 | || (addr->channel >= IPMI_NUM_CHANNELS) | |
420 | || (addr->channel < 0)) | |
421 | return -EINVAL; | |
422 | ||
423 | if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
424 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
425 | { | |
426 | if (len < sizeof(struct ipmi_ipmb_addr)) { | |
427 | return -EINVAL; | |
428 | } | |
429 | return 0; | |
430 | } | |
431 | ||
432 | if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
433 | if (len < sizeof(struct ipmi_lan_addr)) { | |
434 | return -EINVAL; | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | unsigned int ipmi_addr_length(int addr_type) | |
443 | { | |
444 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
445 | return sizeof(struct ipmi_system_interface_addr); | |
446 | ||
447 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
448 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
449 | { | |
450 | return sizeof(struct ipmi_ipmb_addr); | |
451 | } | |
452 | ||
453 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
454 | return sizeof(struct ipmi_lan_addr); | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static void deliver_response(struct ipmi_recv_msg *msg) | |
460 | { | |
461 | msg->user->handler->ipmi_recv_hndl(msg, msg->user->handler_data); | |
462 | } | |
463 | ||
464 | /* Find the next sequence number not being used and add the given | |
465 | message with the given timeout to the sequence table. This must be | |
466 | called with the interface's seq_lock held. */ | |
467 | static int intf_next_seq(ipmi_smi_t intf, | |
468 | struct ipmi_recv_msg *recv_msg, | |
469 | unsigned long timeout, | |
470 | int retries, | |
471 | int broadcast, | |
472 | unsigned char *seq, | |
473 | long *seqid) | |
474 | { | |
475 | int rv = 0; | |
476 | unsigned int i; | |
477 | ||
478 | for (i=intf->curr_seq; | |
479 | (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; | |
480 | i=(i+1)%IPMI_IPMB_NUM_SEQ) | |
481 | { | |
482 | if (! intf->seq_table[i].inuse) | |
483 | break; | |
484 | } | |
485 | ||
486 | if (! intf->seq_table[i].inuse) { | |
487 | intf->seq_table[i].recv_msg = recv_msg; | |
488 | ||
489 | /* Start with the maximum timeout, when the send response | |
490 | comes in we will start the real timer. */ | |
491 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; | |
492 | intf->seq_table[i].orig_timeout = timeout; | |
493 | intf->seq_table[i].retries_left = retries; | |
494 | intf->seq_table[i].broadcast = broadcast; | |
495 | intf->seq_table[i].inuse = 1; | |
496 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
497 | *seq = i; | |
498 | *seqid = intf->seq_table[i].seqid; | |
499 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
500 | } else { | |
501 | rv = -EAGAIN; | |
502 | } | |
503 | ||
504 | return rv; | |
505 | } | |
506 | ||
507 | /* Return the receive message for the given sequence number and | |
508 | release the sequence number so it can be reused. Some other data | |
509 | is passed in to be sure the message matches up correctly (to help | |
510 | guard against message coming in after their timeout and the | |
511 | sequence number being reused). */ | |
512 | static int intf_find_seq(ipmi_smi_t intf, | |
513 | unsigned char seq, | |
514 | short channel, | |
515 | unsigned char cmd, | |
516 | unsigned char netfn, | |
517 | struct ipmi_addr *addr, | |
518 | struct ipmi_recv_msg **recv_msg) | |
519 | { | |
520 | int rv = -ENODEV; | |
521 | unsigned long flags; | |
522 | ||
523 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
524 | return -EINVAL; | |
525 | ||
526 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
527 | if (intf->seq_table[seq].inuse) { | |
528 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
529 | ||
530 | if ((msg->addr.channel == channel) | |
531 | && (msg->msg.cmd == cmd) | |
532 | && (msg->msg.netfn == netfn) | |
533 | && (ipmi_addr_equal(addr, &(msg->addr)))) | |
534 | { | |
535 | *recv_msg = msg; | |
536 | intf->seq_table[seq].inuse = 0; | |
537 | rv = 0; | |
538 | } | |
539 | } | |
540 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
541 | ||
542 | return rv; | |
543 | } | |
544 | ||
545 | ||
546 | /* Start the timer for a specific sequence table entry. */ | |
547 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
548 | long msgid) | |
549 | { | |
550 | int rv = -ENODEV; | |
551 | unsigned long flags; | |
552 | unsigned char seq; | |
553 | unsigned long seqid; | |
554 | ||
555 | ||
556 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
557 | ||
558 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
559 | /* We do this verification because the user can be deleted | |
560 | while a message is outstanding. */ | |
561 | if ((intf->seq_table[seq].inuse) | |
562 | && (intf->seq_table[seq].seqid == seqid)) | |
563 | { | |
564 | struct seq_table *ent = &(intf->seq_table[seq]); | |
565 | ent->timeout = ent->orig_timeout; | |
566 | rv = 0; | |
567 | } | |
568 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
569 | ||
570 | return rv; | |
571 | } | |
572 | ||
573 | /* Got an error for the send message for a specific sequence number. */ | |
574 | static int intf_err_seq(ipmi_smi_t intf, | |
575 | long msgid, | |
576 | unsigned int err) | |
577 | { | |
578 | int rv = -ENODEV; | |
579 | unsigned long flags; | |
580 | unsigned char seq; | |
581 | unsigned long seqid; | |
582 | struct ipmi_recv_msg *msg = NULL; | |
583 | ||
584 | ||
585 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
586 | ||
587 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
588 | /* We do this verification because the user can be deleted | |
589 | while a message is outstanding. */ | |
590 | if ((intf->seq_table[seq].inuse) | |
591 | && (intf->seq_table[seq].seqid == seqid)) | |
592 | { | |
593 | struct seq_table *ent = &(intf->seq_table[seq]); | |
594 | ||
595 | ent->inuse = 0; | |
596 | msg = ent->recv_msg; | |
597 | rv = 0; | |
598 | } | |
599 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
600 | ||
601 | if (msg) { | |
602 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
603 | msg->msg_data[0] = err; | |
604 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
605 | msg->msg.data_len = 1; | |
606 | msg->msg.data = msg->msg_data; | |
607 | deliver_response(msg); | |
608 | } | |
609 | ||
610 | return rv; | |
611 | } | |
612 | ||
613 | ||
614 | int ipmi_create_user(unsigned int if_num, | |
615 | struct ipmi_user_hndl *handler, | |
616 | void *handler_data, | |
617 | ipmi_user_t *user) | |
618 | { | |
619 | unsigned long flags; | |
620 | ipmi_user_t new_user; | |
621 | int rv = 0; | |
622 | ipmi_smi_t intf; | |
623 | ||
624 | /* There is no module usecount here, because it's not | |
625 | required. Since this can only be used by and called from | |
626 | other modules, they will implicitly use this module, and | |
627 | thus this can't be removed unless the other modules are | |
628 | removed. */ | |
629 | ||
630 | if (handler == NULL) | |
631 | return -EINVAL; | |
632 | ||
633 | /* Make sure the driver is actually initialized, this handles | |
634 | problems with initialization order. */ | |
635 | if (!initialized) { | |
636 | rv = ipmi_init_msghandler(); | |
637 | if (rv) | |
638 | return rv; | |
639 | ||
640 | /* The init code doesn't return an error if it was turned | |
641 | off, but it won't initialize. Check that. */ | |
642 | if (!initialized) | |
643 | return -ENODEV; | |
644 | } | |
645 | ||
646 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
647 | if (! new_user) | |
648 | return -ENOMEM; | |
649 | ||
650 | down_read(&interfaces_sem); | |
3a845099 | 651 | if ((if_num >= MAX_IPMI_INTERFACES) || ipmi_interfaces[if_num] == NULL) |
1da177e4 LT |
652 | { |
653 | rv = -EINVAL; | |
654 | goto out_unlock; | |
655 | } | |
656 | ||
657 | intf = ipmi_interfaces[if_num]; | |
658 | ||
659 | new_user->handler = handler; | |
660 | new_user->handler_data = handler_data; | |
661 | new_user->intf = intf; | |
662 | new_user->gets_events = 0; | |
663 | ||
664 | if (!try_module_get(intf->handlers->owner)) { | |
665 | rv = -ENODEV; | |
666 | goto out_unlock; | |
667 | } | |
668 | ||
669 | if (intf->handlers->inc_usecount) { | |
670 | rv = intf->handlers->inc_usecount(intf->send_info); | |
671 | if (rv) { | |
672 | module_put(intf->handlers->owner); | |
673 | goto out_unlock; | |
674 | } | |
675 | } | |
676 | ||
677 | write_lock_irqsave(&intf->users_lock, flags); | |
678 | list_add_tail(&new_user->link, &intf->users); | |
679 | write_unlock_irqrestore(&intf->users_lock, flags); | |
680 | ||
681 | out_unlock: | |
682 | if (rv) { | |
683 | kfree(new_user); | |
684 | } else { | |
685 | *user = new_user; | |
686 | } | |
687 | ||
688 | up_read(&interfaces_sem); | |
689 | return rv; | |
690 | } | |
691 | ||
692 | static int ipmi_destroy_user_nolock(ipmi_user_t user) | |
693 | { | |
694 | int rv = -ENODEV; | |
695 | ipmi_user_t t_user; | |
696 | struct cmd_rcvr *rcvr, *rcvr2; | |
697 | int i; | |
698 | unsigned long flags; | |
699 | ||
700 | /* Find the user and delete them from the list. */ | |
701 | list_for_each_entry(t_user, &(user->intf->users), link) { | |
702 | if (t_user == user) { | |
703 | list_del(&t_user->link); | |
704 | rv = 0; | |
705 | break; | |
706 | } | |
707 | } | |
708 | ||
709 | if (rv) { | |
710 | goto out_unlock; | |
711 | } | |
712 | ||
713 | /* Remove the user from the interfaces sequence table. */ | |
714 | spin_lock_irqsave(&(user->intf->seq_lock), flags); | |
715 | for (i=0; i<IPMI_IPMB_NUM_SEQ; i++) { | |
716 | if (user->intf->seq_table[i].inuse | |
717 | && (user->intf->seq_table[i].recv_msg->user == user)) | |
718 | { | |
719 | user->intf->seq_table[i].inuse = 0; | |
720 | } | |
721 | } | |
722 | spin_unlock_irqrestore(&(user->intf->seq_lock), flags); | |
723 | ||
724 | /* Remove the user from the command receiver's table. */ | |
725 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); | |
726 | list_for_each_entry_safe(rcvr, rcvr2, &(user->intf->cmd_rcvrs), link) { | |
727 | if (rcvr->user == user) { | |
728 | list_del(&rcvr->link); | |
729 | kfree(rcvr); | |
730 | } | |
731 | } | |
732 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); | |
733 | ||
734 | kfree(user); | |
735 | ||
736 | out_unlock: | |
737 | ||
738 | return rv; | |
739 | } | |
740 | ||
741 | int ipmi_destroy_user(ipmi_user_t user) | |
742 | { | |
743 | int rv; | |
744 | ipmi_smi_t intf = user->intf; | |
745 | unsigned long flags; | |
746 | ||
747 | down_read(&interfaces_sem); | |
748 | write_lock_irqsave(&intf->users_lock, flags); | |
749 | rv = ipmi_destroy_user_nolock(user); | |
750 | if (!rv) { | |
751 | module_put(intf->handlers->owner); | |
752 | if (intf->handlers->dec_usecount) | |
753 | intf->handlers->dec_usecount(intf->send_info); | |
754 | } | |
755 | ||
756 | write_unlock_irqrestore(&intf->users_lock, flags); | |
757 | up_read(&interfaces_sem); | |
758 | return rv; | |
759 | } | |
760 | ||
761 | void ipmi_get_version(ipmi_user_t user, | |
762 | unsigned char *major, | |
763 | unsigned char *minor) | |
764 | { | |
765 | *major = user->intf->version_major; | |
766 | *minor = user->intf->version_minor; | |
767 | } | |
768 | ||
769 | void ipmi_set_my_address(ipmi_user_t user, | |
770 | unsigned char address) | |
771 | { | |
772 | user->intf->my_address = address; | |
773 | } | |
774 | ||
775 | unsigned char ipmi_get_my_address(ipmi_user_t user) | |
776 | { | |
777 | return user->intf->my_address; | |
778 | } | |
779 | ||
780 | void ipmi_set_my_LUN(ipmi_user_t user, | |
781 | unsigned char LUN) | |
782 | { | |
783 | user->intf->my_lun = LUN & 0x3; | |
784 | } | |
785 | ||
786 | unsigned char ipmi_get_my_LUN(ipmi_user_t user) | |
787 | { | |
788 | return user->intf->my_lun; | |
789 | } | |
790 | ||
791 | int ipmi_set_gets_events(ipmi_user_t user, int val) | |
792 | { | |
793 | unsigned long flags; | |
794 | struct ipmi_recv_msg *msg, *msg2; | |
795 | ||
796 | read_lock(&(user->intf->users_lock)); | |
797 | spin_lock_irqsave(&(user->intf->events_lock), flags); | |
798 | user->gets_events = val; | |
799 | ||
800 | if (val) { | |
801 | /* Deliver any queued events. */ | |
802 | list_for_each_entry_safe(msg, msg2, &(user->intf->waiting_events), link) { | |
803 | list_del(&msg->link); | |
804 | msg->user = user; | |
805 | deliver_response(msg); | |
806 | } | |
807 | } | |
808 | ||
809 | spin_unlock_irqrestore(&(user->intf->events_lock), flags); | |
810 | read_unlock(&(user->intf->users_lock)); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | int ipmi_register_for_cmd(ipmi_user_t user, | |
816 | unsigned char netfn, | |
817 | unsigned char cmd) | |
818 | { | |
819 | struct cmd_rcvr *cmp; | |
820 | unsigned long flags; | |
821 | struct cmd_rcvr *rcvr; | |
822 | int rv = 0; | |
823 | ||
824 | ||
825 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
826 | if (! rcvr) | |
827 | return -ENOMEM; | |
828 | ||
829 | read_lock(&(user->intf->users_lock)); | |
830 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); | |
831 | if (user->intf->all_cmd_rcvr != NULL) { | |
832 | rv = -EBUSY; | |
833 | goto out_unlock; | |
834 | } | |
835 | ||
836 | /* Make sure the command/netfn is not already registered. */ | |
837 | list_for_each_entry(cmp, &(user->intf->cmd_rcvrs), link) { | |
838 | if ((cmp->netfn == netfn) && (cmp->cmd == cmd)) { | |
839 | rv = -EBUSY; | |
840 | break; | |
841 | } | |
842 | } | |
843 | ||
844 | if (! rv) { | |
845 | rcvr->cmd = cmd; | |
846 | rcvr->netfn = netfn; | |
847 | rcvr->user = user; | |
848 | list_add_tail(&(rcvr->link), &(user->intf->cmd_rcvrs)); | |
849 | } | |
850 | out_unlock: | |
851 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); | |
852 | read_unlock(&(user->intf->users_lock)); | |
853 | ||
854 | if (rv) | |
855 | kfree(rcvr); | |
856 | ||
857 | return rv; | |
858 | } | |
859 | ||
860 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
861 | unsigned char netfn, | |
862 | unsigned char cmd) | |
863 | { | |
864 | unsigned long flags; | |
865 | struct cmd_rcvr *rcvr; | |
866 | int rv = -ENOENT; | |
867 | ||
868 | read_lock(&(user->intf->users_lock)); | |
869 | write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags); | |
870 | /* Make sure the command/netfn is not already registered. */ | |
871 | list_for_each_entry(rcvr, &(user->intf->cmd_rcvrs), link) { | |
872 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { | |
873 | rv = 0; | |
874 | list_del(&rcvr->link); | |
875 | kfree(rcvr); | |
876 | break; | |
877 | } | |
878 | } | |
879 | write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags); | |
880 | read_unlock(&(user->intf->users_lock)); | |
881 | ||
882 | return rv; | |
883 | } | |
884 | ||
885 | void ipmi_user_set_run_to_completion(ipmi_user_t user, int val) | |
886 | { | |
887 | user->intf->handlers->set_run_to_completion(user->intf->send_info, | |
888 | val); | |
889 | } | |
890 | ||
891 | static unsigned char | |
892 | ipmb_checksum(unsigned char *data, int size) | |
893 | { | |
894 | unsigned char csum = 0; | |
895 | ||
896 | for (; size > 0; size--, data++) | |
897 | csum += *data; | |
898 | ||
899 | return -csum; | |
900 | } | |
901 | ||
902 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
903 | struct kernel_ipmi_msg *msg, | |
904 | struct ipmi_ipmb_addr *ipmb_addr, | |
905 | long msgid, | |
906 | unsigned char ipmb_seq, | |
907 | int broadcast, | |
908 | unsigned char source_address, | |
909 | unsigned char source_lun) | |
910 | { | |
911 | int i = broadcast; | |
912 | ||
913 | /* Format the IPMB header data. */ | |
914 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
915 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
916 | smi_msg->data[2] = ipmb_addr->channel; | |
917 | if (broadcast) | |
918 | smi_msg->data[3] = 0; | |
919 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
920 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
921 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
922 | smi_msg->data[i+6] = source_address; | |
923 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
924 | smi_msg->data[i+8] = msg->cmd; | |
925 | ||
926 | /* Now tack on the data to the message. */ | |
927 | if (msg->data_len > 0) | |
928 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
929 | msg->data_len); | |
930 | smi_msg->data_size = msg->data_len + 9; | |
931 | ||
932 | /* Now calculate the checksum and tack it on. */ | |
933 | smi_msg->data[i+smi_msg->data_size] | |
934 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
935 | smi_msg->data_size-6); | |
936 | ||
937 | /* Add on the checksum size and the offset from the | |
938 | broadcast. */ | |
939 | smi_msg->data_size += 1 + i; | |
940 | ||
941 | smi_msg->msgid = msgid; | |
942 | } | |
943 | ||
944 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
945 | struct kernel_ipmi_msg *msg, | |
946 | struct ipmi_lan_addr *lan_addr, | |
947 | long msgid, | |
948 | unsigned char ipmb_seq, | |
949 | unsigned char source_lun) | |
950 | { | |
951 | /* Format the IPMB header data. */ | |
952 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
953 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
954 | smi_msg->data[2] = lan_addr->channel; | |
955 | smi_msg->data[3] = lan_addr->session_handle; | |
956 | smi_msg->data[4] = lan_addr->remote_SWID; | |
957 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
958 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
959 | smi_msg->data[7] = lan_addr->local_SWID; | |
960 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
961 | smi_msg->data[9] = msg->cmd; | |
962 | ||
963 | /* Now tack on the data to the message. */ | |
964 | if (msg->data_len > 0) | |
965 | memcpy(&(smi_msg->data[10]), msg->data, | |
966 | msg->data_len); | |
967 | smi_msg->data_size = msg->data_len + 10; | |
968 | ||
969 | /* Now calculate the checksum and tack it on. */ | |
970 | smi_msg->data[smi_msg->data_size] | |
971 | = ipmb_checksum(&(smi_msg->data[7]), | |
972 | smi_msg->data_size-7); | |
973 | ||
974 | /* Add on the checksum size and the offset from the | |
975 | broadcast. */ | |
976 | smi_msg->data_size += 1; | |
977 | ||
978 | smi_msg->msgid = msgid; | |
979 | } | |
980 | ||
981 | /* Separate from ipmi_request so that the user does not have to be | |
982 | supplied in certain circumstances (mainly at panic time). If | |
983 | messages are supplied, they will be freed, even if an error | |
984 | occurs. */ | |
985 | static inline int i_ipmi_request(ipmi_user_t user, | |
986 | ipmi_smi_t intf, | |
987 | struct ipmi_addr *addr, | |
988 | long msgid, | |
989 | struct kernel_ipmi_msg *msg, | |
990 | void *user_msg_data, | |
991 | void *supplied_smi, | |
992 | struct ipmi_recv_msg *supplied_recv, | |
993 | int priority, | |
994 | unsigned char source_address, | |
995 | unsigned char source_lun, | |
996 | int retries, | |
997 | unsigned int retry_time_ms) | |
998 | { | |
999 | int rv = 0; | |
1000 | struct ipmi_smi_msg *smi_msg; | |
1001 | struct ipmi_recv_msg *recv_msg; | |
1002 | unsigned long flags; | |
1003 | ||
1004 | ||
1005 | if (supplied_recv) { | |
1006 | recv_msg = supplied_recv; | |
1007 | } else { | |
1008 | recv_msg = ipmi_alloc_recv_msg(); | |
1009 | if (recv_msg == NULL) { | |
1010 | return -ENOMEM; | |
1011 | } | |
1012 | } | |
1013 | recv_msg->user_msg_data = user_msg_data; | |
1014 | ||
1015 | if (supplied_smi) { | |
1016 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; | |
1017 | } else { | |
1018 | smi_msg = ipmi_alloc_smi_msg(); | |
1019 | if (smi_msg == NULL) { | |
1020 | ipmi_free_recv_msg(recv_msg); | |
1021 | return -ENOMEM; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | recv_msg->user = user; | |
1026 | recv_msg->msgid = msgid; | |
1027 | /* Store the message to send in the receive message so timeout | |
1028 | responses can get the proper response data. */ | |
1029 | recv_msg->msg = *msg; | |
1030 | ||
1031 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1032 | struct ipmi_system_interface_addr *smi_addr; | |
1033 | ||
1034 | if (msg->netfn & 1) { | |
1035 | /* Responses are not allowed to the SMI. */ | |
1036 | rv = -EINVAL; | |
1037 | goto out_err; | |
1038 | } | |
1039 | ||
1040 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1041 | if (smi_addr->lun > 3) { | |
1042 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1043 | intf->sent_invalid_commands++; | |
1044 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1045 | rv = -EINVAL; | |
1046 | goto out_err; | |
1047 | } | |
1048 | ||
1049 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1050 | ||
1051 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1052 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1053 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
1054 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) | |
1055 | { | |
1056 | /* We don't let the user do these, since we manage | |
1057 | the sequence numbers. */ | |
1058 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1059 | intf->sent_invalid_commands++; | |
1060 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1061 | rv = -EINVAL; | |
1062 | goto out_err; | |
1063 | } | |
1064 | ||
1065 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { | |
1066 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1067 | intf->sent_invalid_commands++; | |
1068 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1069 | rv = -EMSGSIZE; | |
1070 | goto out_err; | |
1071 | } | |
1072 | ||
1073 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1074 | smi_msg->data[1] = msg->cmd; | |
1075 | smi_msg->msgid = msgid; | |
1076 | smi_msg->user_data = recv_msg; | |
1077 | if (msg->data_len > 0) | |
1078 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1079 | smi_msg->data_size = msg->data_len + 2; | |
1080 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1081 | intf->sent_local_commands++; | |
1082 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1083 | } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
1084 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
1085 | { | |
1086 | struct ipmi_ipmb_addr *ipmb_addr; | |
1087 | unsigned char ipmb_seq; | |
1088 | long seqid; | |
1089 | int broadcast = 0; | |
1090 | ||
1091 | if (addr->channel > IPMI_NUM_CHANNELS) { | |
1092 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1093 | intf->sent_invalid_commands++; | |
1094 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1095 | rv = -EINVAL; | |
1096 | goto out_err; | |
1097 | } | |
1098 | ||
1099 | if (intf->channels[addr->channel].medium | |
1100 | != IPMI_CHANNEL_MEDIUM_IPMB) | |
1101 | { | |
1102 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1103 | intf->sent_invalid_commands++; | |
1104 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1105 | rv = -EINVAL; | |
1106 | goto out_err; | |
1107 | } | |
1108 | ||
1109 | if (retries < 0) { | |
1110 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1111 | retries = 0; /* Don't retry broadcasts. */ | |
1112 | else | |
1113 | retries = 4; | |
1114 | } | |
1115 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
1116 | /* Broadcasts add a zero at the beginning of the | |
1117 | message, but otherwise is the same as an IPMB | |
1118 | address. */ | |
1119 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
1120 | broadcast = 1; | |
1121 | } | |
1122 | ||
1123 | ||
1124 | /* Default to 1 second retries. */ | |
1125 | if (retry_time_ms == 0) | |
1126 | retry_time_ms = 1000; | |
1127 | ||
1128 | /* 9 for the header and 1 for the checksum, plus | |
1129 | possibly one for the broadcast. */ | |
1130 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { | |
1131 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1132 | intf->sent_invalid_commands++; | |
1133 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1134 | rv = -EMSGSIZE; | |
1135 | goto out_err; | |
1136 | } | |
1137 | ||
1138 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1139 | if (ipmb_addr->lun > 3) { | |
1140 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1141 | intf->sent_invalid_commands++; | |
1142 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1143 | rv = -EINVAL; | |
1144 | goto out_err; | |
1145 | } | |
1146 | ||
1147 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1148 | ||
1149 | if (recv_msg->msg.netfn & 0x1) { | |
1150 | /* It's a response, so use the user's sequence | |
1151 | from msgid. */ | |
1152 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1153 | intf->sent_ipmb_responses++; | |
1154 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1155 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, | |
1156 | msgid, broadcast, | |
1157 | source_address, source_lun); | |
1158 | ||
1159 | /* Save the receive message so we can use it | |
1160 | to deliver the response. */ | |
1161 | smi_msg->user_data = recv_msg; | |
1162 | } else { | |
1163 | /* It's a command, so get a sequence for it. */ | |
1164 | ||
1165 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1166 | ||
1167 | spin_lock(&intf->counter_lock); | |
1168 | intf->sent_ipmb_commands++; | |
1169 | spin_unlock(&intf->counter_lock); | |
1170 | ||
1171 | /* Create a sequence number with a 1 second | |
1172 | timeout and 4 retries. */ | |
1173 | rv = intf_next_seq(intf, | |
1174 | recv_msg, | |
1175 | retry_time_ms, | |
1176 | retries, | |
1177 | broadcast, | |
1178 | &ipmb_seq, | |
1179 | &seqid); | |
1180 | if (rv) { | |
1181 | /* We have used up all the sequence numbers, | |
1182 | probably, so abort. */ | |
1183 | spin_unlock_irqrestore(&(intf->seq_lock), | |
1184 | flags); | |
1185 | goto out_err; | |
1186 | } | |
1187 | ||
1188 | /* Store the sequence number in the message, | |
1189 | so that when the send message response | |
1190 | comes back we can start the timer. */ | |
1191 | format_ipmb_msg(smi_msg, msg, ipmb_addr, | |
1192 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1193 | ipmb_seq, broadcast, | |
1194 | source_address, source_lun); | |
1195 | ||
1196 | /* Copy the message into the recv message data, so we | |
1197 | can retransmit it later if necessary. */ | |
1198 | memcpy(recv_msg->msg_data, smi_msg->data, | |
1199 | smi_msg->data_size); | |
1200 | recv_msg->msg.data = recv_msg->msg_data; | |
1201 | recv_msg->msg.data_len = smi_msg->data_size; | |
1202 | ||
1203 | /* We don't unlock until here, because we need | |
1204 | to copy the completed message into the | |
1205 | recv_msg before we release the lock. | |
1206 | Otherwise, race conditions may bite us. I | |
1207 | know that's pretty paranoid, but I prefer | |
1208 | to be correct. */ | |
1209 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1210 | } | |
1211 | } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
1212 | struct ipmi_lan_addr *lan_addr; | |
1213 | unsigned char ipmb_seq; | |
1214 | long seqid; | |
1215 | ||
1216 | if (addr->channel > IPMI_NUM_CHANNELS) { | |
1217 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1218 | intf->sent_invalid_commands++; | |
1219 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1220 | rv = -EINVAL; | |
1221 | goto out_err; | |
1222 | } | |
1223 | ||
1224 | if ((intf->channels[addr->channel].medium | |
1225 | != IPMI_CHANNEL_MEDIUM_8023LAN) | |
1226 | && (intf->channels[addr->channel].medium | |
1227 | != IPMI_CHANNEL_MEDIUM_ASYNC)) | |
1228 | { | |
1229 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1230 | intf->sent_invalid_commands++; | |
1231 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1232 | rv = -EINVAL; | |
1233 | goto out_err; | |
1234 | } | |
1235 | ||
1236 | retries = 4; | |
1237 | ||
1238 | /* Default to 1 second retries. */ | |
1239 | if (retry_time_ms == 0) | |
1240 | retry_time_ms = 1000; | |
1241 | ||
1242 | /* 11 for the header and 1 for the checksum. */ | |
1243 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
1244 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1245 | intf->sent_invalid_commands++; | |
1246 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1247 | rv = -EMSGSIZE; | |
1248 | goto out_err; | |
1249 | } | |
1250 | ||
1251 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1252 | if (lan_addr->lun > 3) { | |
1253 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1254 | intf->sent_invalid_commands++; | |
1255 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1256 | rv = -EINVAL; | |
1257 | goto out_err; | |
1258 | } | |
1259 | ||
1260 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1261 | ||
1262 | if (recv_msg->msg.netfn & 0x1) { | |
1263 | /* It's a response, so use the user's sequence | |
1264 | from msgid. */ | |
1265 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1266 | intf->sent_lan_responses++; | |
1267 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1268 | format_lan_msg(smi_msg, msg, lan_addr, msgid, | |
1269 | msgid, source_lun); | |
1270 | ||
1271 | /* Save the receive message so we can use it | |
1272 | to deliver the response. */ | |
1273 | smi_msg->user_data = recv_msg; | |
1274 | } else { | |
1275 | /* It's a command, so get a sequence for it. */ | |
1276 | ||
1277 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1278 | ||
1279 | spin_lock(&intf->counter_lock); | |
1280 | intf->sent_lan_commands++; | |
1281 | spin_unlock(&intf->counter_lock); | |
1282 | ||
1283 | /* Create a sequence number with a 1 second | |
1284 | timeout and 4 retries. */ | |
1285 | rv = intf_next_seq(intf, | |
1286 | recv_msg, | |
1287 | retry_time_ms, | |
1288 | retries, | |
1289 | 0, | |
1290 | &ipmb_seq, | |
1291 | &seqid); | |
1292 | if (rv) { | |
1293 | /* We have used up all the sequence numbers, | |
1294 | probably, so abort. */ | |
1295 | spin_unlock_irqrestore(&(intf->seq_lock), | |
1296 | flags); | |
1297 | goto out_err; | |
1298 | } | |
1299 | ||
1300 | /* Store the sequence number in the message, | |
1301 | so that when the send message response | |
1302 | comes back we can start the timer. */ | |
1303 | format_lan_msg(smi_msg, msg, lan_addr, | |
1304 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1305 | ipmb_seq, source_lun); | |
1306 | ||
1307 | /* Copy the message into the recv message data, so we | |
1308 | can retransmit it later if necessary. */ | |
1309 | memcpy(recv_msg->msg_data, smi_msg->data, | |
1310 | smi_msg->data_size); | |
1311 | recv_msg->msg.data = recv_msg->msg_data; | |
1312 | recv_msg->msg.data_len = smi_msg->data_size; | |
1313 | ||
1314 | /* We don't unlock until here, because we need | |
1315 | to copy the completed message into the | |
1316 | recv_msg before we release the lock. | |
1317 | Otherwise, race conditions may bite us. I | |
1318 | know that's pretty paranoid, but I prefer | |
1319 | to be correct. */ | |
1320 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1321 | } | |
1322 | } else { | |
1323 | /* Unknown address type. */ | |
1324 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1325 | intf->sent_invalid_commands++; | |
1326 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1327 | rv = -EINVAL; | |
1328 | goto out_err; | |
1329 | } | |
1330 | ||
1331 | #ifdef DEBUG_MSGING | |
1332 | { | |
1333 | int m; | |
1334 | for (m=0; m<smi_msg->data_size; m++) | |
1335 | printk(" %2.2x", smi_msg->data[m]); | |
1336 | printk("\n"); | |
1337 | } | |
1338 | #endif | |
1339 | intf->handlers->sender(intf->send_info, smi_msg, priority); | |
1340 | ||
1341 | return 0; | |
1342 | ||
1343 | out_err: | |
1344 | ipmi_free_smi_msg(smi_msg); | |
1345 | ipmi_free_recv_msg(recv_msg); | |
1346 | return rv; | |
1347 | } | |
1348 | ||
1349 | int ipmi_request_settime(ipmi_user_t user, | |
1350 | struct ipmi_addr *addr, | |
1351 | long msgid, | |
1352 | struct kernel_ipmi_msg *msg, | |
1353 | void *user_msg_data, | |
1354 | int priority, | |
1355 | int retries, | |
1356 | unsigned int retry_time_ms) | |
1357 | { | |
1358 | return i_ipmi_request(user, | |
1359 | user->intf, | |
1360 | addr, | |
1361 | msgid, | |
1362 | msg, | |
1363 | user_msg_data, | |
1364 | NULL, NULL, | |
1365 | priority, | |
1366 | user->intf->my_address, | |
1367 | user->intf->my_lun, | |
1368 | retries, | |
1369 | retry_time_ms); | |
1370 | } | |
1371 | ||
1372 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1373 | struct ipmi_addr *addr, | |
1374 | long msgid, | |
1375 | struct kernel_ipmi_msg *msg, | |
1376 | void *user_msg_data, | |
1377 | void *supplied_smi, | |
1378 | struct ipmi_recv_msg *supplied_recv, | |
1379 | int priority) | |
1380 | { | |
1381 | return i_ipmi_request(user, | |
1382 | user->intf, | |
1383 | addr, | |
1384 | msgid, | |
1385 | msg, | |
1386 | user_msg_data, | |
1387 | supplied_smi, | |
1388 | supplied_recv, | |
1389 | priority, | |
1390 | user->intf->my_address, | |
1391 | user->intf->my_lun, | |
1392 | -1, 0); | |
1393 | } | |
1394 | ||
1395 | static int ipmb_file_read_proc(char *page, char **start, off_t off, | |
1396 | int count, int *eof, void *data) | |
1397 | { | |
1398 | char *out = (char *) page; | |
1399 | ipmi_smi_t intf = data; | |
1400 | ||
1401 | return sprintf(out, "%x\n", intf->my_address); | |
1402 | } | |
1403 | ||
1404 | static int version_file_read_proc(char *page, char **start, off_t off, | |
1405 | int count, int *eof, void *data) | |
1406 | { | |
1407 | char *out = (char *) page; | |
1408 | ipmi_smi_t intf = data; | |
1409 | ||
1410 | return sprintf(out, "%d.%d\n", | |
1411 | intf->version_major, intf->version_minor); | |
1412 | } | |
1413 | ||
1414 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
1415 | int count, int *eof, void *data) | |
1416 | { | |
1417 | char *out = (char *) page; | |
1418 | ipmi_smi_t intf = data; | |
1419 | ||
1420 | out += sprintf(out, "sent_invalid_commands: %d\n", | |
1421 | intf->sent_invalid_commands); | |
1422 | out += sprintf(out, "sent_local_commands: %d\n", | |
1423 | intf->sent_local_commands); | |
1424 | out += sprintf(out, "handled_local_responses: %d\n", | |
1425 | intf->handled_local_responses); | |
1426 | out += sprintf(out, "unhandled_local_responses: %d\n", | |
1427 | intf->unhandled_local_responses); | |
1428 | out += sprintf(out, "sent_ipmb_commands: %d\n", | |
1429 | intf->sent_ipmb_commands); | |
1430 | out += sprintf(out, "sent_ipmb_command_errs: %d\n", | |
1431 | intf->sent_ipmb_command_errs); | |
1432 | out += sprintf(out, "retransmitted_ipmb_commands: %d\n", | |
1433 | intf->retransmitted_ipmb_commands); | |
1434 | out += sprintf(out, "timed_out_ipmb_commands: %d\n", | |
1435 | intf->timed_out_ipmb_commands); | |
1436 | out += sprintf(out, "timed_out_ipmb_broadcasts: %d\n", | |
1437 | intf->timed_out_ipmb_broadcasts); | |
1438 | out += sprintf(out, "sent_ipmb_responses: %d\n", | |
1439 | intf->sent_ipmb_responses); | |
1440 | out += sprintf(out, "handled_ipmb_responses: %d\n", | |
1441 | intf->handled_ipmb_responses); | |
1442 | out += sprintf(out, "invalid_ipmb_responses: %d\n", | |
1443 | intf->invalid_ipmb_responses); | |
1444 | out += sprintf(out, "unhandled_ipmb_responses: %d\n", | |
1445 | intf->unhandled_ipmb_responses); | |
1446 | out += sprintf(out, "sent_lan_commands: %d\n", | |
1447 | intf->sent_lan_commands); | |
1448 | out += sprintf(out, "sent_lan_command_errs: %d\n", | |
1449 | intf->sent_lan_command_errs); | |
1450 | out += sprintf(out, "retransmitted_lan_commands: %d\n", | |
1451 | intf->retransmitted_lan_commands); | |
1452 | out += sprintf(out, "timed_out_lan_commands: %d\n", | |
1453 | intf->timed_out_lan_commands); | |
1454 | out += sprintf(out, "sent_lan_responses: %d\n", | |
1455 | intf->sent_lan_responses); | |
1456 | out += sprintf(out, "handled_lan_responses: %d\n", | |
1457 | intf->handled_lan_responses); | |
1458 | out += sprintf(out, "invalid_lan_responses: %d\n", | |
1459 | intf->invalid_lan_responses); | |
1460 | out += sprintf(out, "unhandled_lan_responses: %d\n", | |
1461 | intf->unhandled_lan_responses); | |
1462 | out += sprintf(out, "handled_commands: %d\n", | |
1463 | intf->handled_commands); | |
1464 | out += sprintf(out, "invalid_commands: %d\n", | |
1465 | intf->invalid_commands); | |
1466 | out += sprintf(out, "unhandled_commands: %d\n", | |
1467 | intf->unhandled_commands); | |
1468 | out += sprintf(out, "invalid_events: %d\n", | |
1469 | intf->invalid_events); | |
1470 | out += sprintf(out, "events: %d\n", | |
1471 | intf->events); | |
1472 | ||
1473 | return (out - ((char *) page)); | |
1474 | } | |
1475 | ||
1476 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
1477 | read_proc_t *read_proc, write_proc_t *write_proc, | |
1478 | void *data, struct module *owner) | |
1479 | { | |
1da177e4 | 1480 | int rv = 0; |
3b625943 CM |
1481 | #ifdef CONFIG_PROC_FS |
1482 | struct proc_dir_entry *file; | |
1da177e4 LT |
1483 | struct ipmi_proc_entry *entry; |
1484 | ||
1485 | /* Create a list element. */ | |
1486 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
1487 | if (!entry) | |
1488 | return -ENOMEM; | |
1489 | entry->name = kmalloc(strlen(name)+1, GFP_KERNEL); | |
1490 | if (!entry->name) { | |
1491 | kfree(entry); | |
1492 | return -ENOMEM; | |
1493 | } | |
1494 | strcpy(entry->name, name); | |
1495 | ||
1496 | file = create_proc_entry(name, 0, smi->proc_dir); | |
1497 | if (!file) { | |
1498 | kfree(entry->name); | |
1499 | kfree(entry); | |
1500 | rv = -ENOMEM; | |
1501 | } else { | |
1502 | file->nlink = 1; | |
1503 | file->data = data; | |
1504 | file->read_proc = read_proc; | |
1505 | file->write_proc = write_proc; | |
1506 | file->owner = owner; | |
1507 | ||
3b625943 | 1508 | spin_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1509 | /* Stick it on the list. */ |
1510 | entry->next = smi->proc_entries; | |
1511 | smi->proc_entries = entry; | |
3b625943 | 1512 | spin_unlock(&smi->proc_entry_lock); |
1da177e4 | 1513 | } |
3b625943 | 1514 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1515 | |
1516 | return rv; | |
1517 | } | |
1518 | ||
1519 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
1520 | { | |
1521 | int rv = 0; | |
1522 | ||
3b625943 | 1523 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1524 | sprintf(smi->proc_dir_name, "%d", num); |
1525 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
1526 | if (!smi->proc_dir) | |
1527 | rv = -ENOMEM; | |
1528 | else { | |
1529 | smi->proc_dir->owner = THIS_MODULE; | |
1530 | } | |
1531 | ||
1532 | if (rv == 0) | |
1533 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
1534 | stat_file_read_proc, NULL, | |
1535 | smi, THIS_MODULE); | |
1536 | ||
1537 | if (rv == 0) | |
1538 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
1539 | ipmb_file_read_proc, NULL, | |
1540 | smi, THIS_MODULE); | |
1541 | ||
1542 | if (rv == 0) | |
1543 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
1544 | version_file_read_proc, NULL, | |
1545 | smi, THIS_MODULE); | |
3b625943 | 1546 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1547 | |
1548 | return rv; | |
1549 | } | |
1550 | ||
1551 | static void remove_proc_entries(ipmi_smi_t smi) | |
1552 | { | |
3b625943 | 1553 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1554 | struct ipmi_proc_entry *entry; |
1555 | ||
3b625943 | 1556 | spin_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1557 | while (smi->proc_entries) { |
1558 | entry = smi->proc_entries; | |
1559 | smi->proc_entries = entry->next; | |
1560 | ||
1561 | remove_proc_entry(entry->name, smi->proc_dir); | |
1562 | kfree(entry->name); | |
1563 | kfree(entry); | |
1564 | } | |
3b625943 | 1565 | spin_unlock(&smi->proc_entry_lock); |
1da177e4 | 1566 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 1567 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | static int | |
1571 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
1572 | { | |
1573 | struct kernel_ipmi_msg msg; | |
1574 | unsigned char data[1]; | |
1575 | struct ipmi_system_interface_addr si; | |
1576 | ||
1577 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
1578 | si.channel = IPMI_BMC_CHANNEL; | |
1579 | si.lun = 0; | |
1580 | ||
1581 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
1582 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
1583 | msg.data = data; | |
1584 | msg.data_len = 1; | |
1585 | data[0] = chan; | |
1586 | return i_ipmi_request(NULL, | |
1587 | intf, | |
1588 | (struct ipmi_addr *) &si, | |
1589 | 0, | |
1590 | &msg, | |
1591 | NULL, | |
1592 | NULL, | |
1593 | NULL, | |
1594 | 0, | |
1595 | intf->my_address, | |
1596 | intf->my_lun, | |
1597 | -1, 0); | |
1598 | } | |
1599 | ||
1600 | static void | |
1601 | channel_handler(ipmi_smi_t intf, struct ipmi_smi_msg *msg) | |
1602 | { | |
1603 | int rv = 0; | |
1604 | int chan; | |
1605 | ||
1606 | if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2)) | |
1607 | && (msg->rsp[1] == IPMI_GET_CHANNEL_INFO_CMD)) | |
1608 | { | |
1609 | /* It's the one we want */ | |
1610 | if (msg->rsp[2] != 0) { | |
1611 | /* Got an error from the channel, just go on. */ | |
1612 | ||
1613 | if (msg->rsp[2] == IPMI_INVALID_COMMAND_ERR) { | |
1614 | /* If the MC does not support this | |
1615 | command, that is legal. We just | |
1616 | assume it has one IPMB at channel | |
1617 | zero. */ | |
1618 | intf->channels[0].medium | |
1619 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
1620 | intf->channels[0].protocol | |
1621 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1622 | rv = -ENOSYS; | |
1623 | ||
1624 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
1625 | wake_up(&intf->waitq); | |
1626 | goto out; | |
1627 | } | |
1628 | goto next_channel; | |
1629 | } | |
1630 | if (msg->rsp_size < 6) { | |
1631 | /* Message not big enough, just go on. */ | |
1632 | goto next_channel; | |
1633 | } | |
1634 | chan = intf->curr_channel; | |
1635 | intf->channels[chan].medium = msg->rsp[4] & 0x7f; | |
1636 | intf->channels[chan].protocol = msg->rsp[5] & 0x1f; | |
1637 | ||
1638 | next_channel: | |
1639 | intf->curr_channel++; | |
1640 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
1641 | wake_up(&intf->waitq); | |
1642 | else | |
1643 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
1644 | ||
1645 | if (rv) { | |
1646 | /* Got an error somehow, just give up. */ | |
1647 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
1648 | wake_up(&intf->waitq); | |
1649 | ||
1650 | printk(KERN_WARNING PFX | |
1651 | "Error sending channel information: %d\n", | |
1652 | rv); | |
1653 | } | |
1654 | } | |
1655 | out: | |
1656 | return; | |
1657 | } | |
1658 | ||
1659 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, | |
1660 | void *send_info, | |
1661 | unsigned char version_major, | |
1662 | unsigned char version_minor, | |
1663 | unsigned char slave_addr, | |
1664 | ipmi_smi_t *intf) | |
1665 | { | |
1666 | int i, j; | |
1667 | int rv; | |
1668 | ipmi_smi_t new_intf; | |
1669 | unsigned long flags; | |
1670 | ||
1671 | ||
1672 | /* Make sure the driver is actually initialized, this handles | |
1673 | problems with initialization order. */ | |
1674 | if (!initialized) { | |
1675 | rv = ipmi_init_msghandler(); | |
1676 | if (rv) | |
1677 | return rv; | |
1678 | /* The init code doesn't return an error if it was turned | |
1679 | off, but it won't initialize. Check that. */ | |
1680 | if (!initialized) | |
1681 | return -ENODEV; | |
1682 | } | |
1683 | ||
1684 | new_intf = kmalloc(sizeof(*new_intf), GFP_KERNEL); | |
1685 | if (!new_intf) | |
1686 | return -ENOMEM; | |
1687 | memset(new_intf, 0, sizeof(*new_intf)); | |
1688 | ||
1689 | new_intf->proc_dir = NULL; | |
1690 | ||
1691 | rv = -ENOMEM; | |
1692 | ||
1693 | down_write(&interfaces_sem); | |
1694 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
1695 | if (ipmi_interfaces[i] == NULL) { | |
1696 | new_intf->intf_num = i; | |
1697 | new_intf->version_major = version_major; | |
1698 | new_intf->version_minor = version_minor; | |
1699 | if (slave_addr == 0) | |
1700 | new_intf->my_address = IPMI_BMC_SLAVE_ADDR; | |
1701 | else | |
1702 | new_intf->my_address = slave_addr; | |
1703 | new_intf->my_lun = 2; /* the SMS LUN. */ | |
1704 | rwlock_init(&(new_intf->users_lock)); | |
1705 | INIT_LIST_HEAD(&(new_intf->users)); | |
1706 | new_intf->handlers = handlers; | |
1707 | new_intf->send_info = send_info; | |
1708 | spin_lock_init(&(new_intf->seq_lock)); | |
1709 | for (j=0; j<IPMI_IPMB_NUM_SEQ; j++) { | |
1710 | new_intf->seq_table[j].inuse = 0; | |
1711 | new_intf->seq_table[j].seqid = 0; | |
1712 | } | |
1713 | new_intf->curr_seq = 0; | |
3b625943 CM |
1714 | #ifdef CONFIG_PROC_FS |
1715 | spin_lock_init(&(new_intf->proc_entry_lock)); | |
1716 | #endif | |
1da177e4 LT |
1717 | spin_lock_init(&(new_intf->waiting_msgs_lock)); |
1718 | INIT_LIST_HEAD(&(new_intf->waiting_msgs)); | |
1719 | spin_lock_init(&(new_intf->events_lock)); | |
1720 | INIT_LIST_HEAD(&(new_intf->waiting_events)); | |
1721 | new_intf->waiting_events_count = 0; | |
1722 | rwlock_init(&(new_intf->cmd_rcvr_lock)); | |
1723 | init_waitqueue_head(&new_intf->waitq); | |
1724 | INIT_LIST_HEAD(&(new_intf->cmd_rcvrs)); | |
1725 | new_intf->all_cmd_rcvr = NULL; | |
1726 | ||
1727 | spin_lock_init(&(new_intf->counter_lock)); | |
1728 | ||
1729 | spin_lock_irqsave(&interfaces_lock, flags); | |
1730 | ipmi_interfaces[i] = new_intf; | |
1731 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
1732 | ||
1733 | rv = 0; | |
1734 | *intf = new_intf; | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | downgrade_write(&interfaces_sem); | |
1740 | ||
1741 | if (rv == 0) | |
1742 | rv = add_proc_entries(*intf, i); | |
1743 | ||
1744 | if (rv == 0) { | |
1745 | if ((version_major > 1) | |
1746 | || ((version_major == 1) && (version_minor >= 5))) | |
1747 | { | |
1748 | /* Start scanning the channels to see what is | |
1749 | available. */ | |
1750 | (*intf)->null_user_handler = channel_handler; | |
1751 | (*intf)->curr_channel = 0; | |
1752 | rv = send_channel_info_cmd(*intf, 0); | |
1753 | if (rv) | |
1754 | goto out; | |
1755 | ||
1756 | /* Wait for the channel info to be read. */ | |
1757 | up_read(&interfaces_sem); | |
1758 | wait_event((*intf)->waitq, | |
1759 | ((*intf)->curr_channel>=IPMI_MAX_CHANNELS)); | |
1760 | down_read(&interfaces_sem); | |
1761 | ||
1762 | if (ipmi_interfaces[i] != new_intf) | |
1763 | /* Well, it went away. Just return. */ | |
1764 | goto out; | |
1765 | } else { | |
1766 | /* Assume a single IPMB channel at zero. */ | |
1767 | (*intf)->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
1768 | (*intf)->channels[0].protocol | |
1769 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1770 | } | |
1771 | ||
1772 | /* Call all the watcher interfaces to tell | |
1773 | them that a new interface is available. */ | |
1774 | call_smi_watchers(i); | |
1775 | } | |
1776 | ||
1777 | out: | |
1778 | up_read(&interfaces_sem); | |
1779 | ||
1780 | if (rv) { | |
1781 | if (new_intf->proc_dir) | |
1782 | remove_proc_entries(new_intf); | |
1783 | kfree(new_intf); | |
1784 | } | |
1785 | ||
1786 | return rv; | |
1787 | } | |
1788 | ||
1789 | static void free_recv_msg_list(struct list_head *q) | |
1790 | { | |
1791 | struct ipmi_recv_msg *msg, *msg2; | |
1792 | ||
1793 | list_for_each_entry_safe(msg, msg2, q, link) { | |
1794 | list_del(&msg->link); | |
1795 | ipmi_free_recv_msg(msg); | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | static void free_cmd_rcvr_list(struct list_head *q) | |
1800 | { | |
1801 | struct cmd_rcvr *rcvr, *rcvr2; | |
1802 | ||
1803 | list_for_each_entry_safe(rcvr, rcvr2, q, link) { | |
1804 | list_del(&rcvr->link); | |
1805 | kfree(rcvr); | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | static void clean_up_interface_data(ipmi_smi_t intf) | |
1810 | { | |
1811 | int i; | |
1812 | ||
1813 | free_recv_msg_list(&(intf->waiting_msgs)); | |
1814 | free_recv_msg_list(&(intf->waiting_events)); | |
1815 | free_cmd_rcvr_list(&(intf->cmd_rcvrs)); | |
1816 | ||
1817 | for (i=0; i<IPMI_IPMB_NUM_SEQ; i++) { | |
1818 | if ((intf->seq_table[i].inuse) | |
1819 | && (intf->seq_table[i].recv_msg)) | |
1820 | { | |
1821 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); | |
1822 | } | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | int ipmi_unregister_smi(ipmi_smi_t intf) | |
1827 | { | |
1828 | int rv = -ENODEV; | |
1829 | int i; | |
1830 | struct ipmi_smi_watcher *w; | |
1831 | unsigned long flags; | |
1832 | ||
1833 | down_write(&interfaces_sem); | |
1834 | if (list_empty(&(intf->users))) | |
1835 | { | |
1836 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
1837 | if (ipmi_interfaces[i] == intf) { | |
1838 | remove_proc_entries(intf); | |
1839 | spin_lock_irqsave(&interfaces_lock, flags); | |
1840 | ipmi_interfaces[i] = NULL; | |
1841 | clean_up_interface_data(intf); | |
1842 | spin_unlock_irqrestore(&interfaces_lock,flags); | |
1843 | kfree(intf); | |
1844 | rv = 0; | |
1845 | goto out_call_watcher; | |
1846 | } | |
1847 | } | |
1848 | } else { | |
1849 | rv = -EBUSY; | |
1850 | } | |
1851 | up_write(&interfaces_sem); | |
1852 | ||
1853 | return rv; | |
1854 | ||
1855 | out_call_watcher: | |
1856 | downgrade_write(&interfaces_sem); | |
1857 | ||
1858 | /* Call all the watcher interfaces to tell them that | |
1859 | an interface is gone. */ | |
1860 | down_read(&smi_watchers_sem); | |
1861 | list_for_each_entry(w, &smi_watchers, link) { | |
1862 | w->smi_gone(i); | |
1863 | } | |
1864 | up_read(&smi_watchers_sem); | |
1865 | up_read(&interfaces_sem); | |
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
1870 | struct ipmi_smi_msg *msg) | |
1871 | { | |
1872 | struct ipmi_ipmb_addr ipmb_addr; | |
1873 | struct ipmi_recv_msg *recv_msg; | |
1874 | unsigned long flags; | |
1875 | ||
1876 | ||
1877 | /* This is 11, not 10, because the response must contain a | |
1878 | * completion code. */ | |
1879 | if (msg->rsp_size < 11) { | |
1880 | /* Message not big enough, just ignore it. */ | |
1881 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1882 | intf->invalid_ipmb_responses++; | |
1883 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | if (msg->rsp[2] != 0) { | |
1888 | /* An error getting the response, just ignore it. */ | |
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
1893 | ipmb_addr.slave_addr = msg->rsp[6]; | |
1894 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
1895 | ipmb_addr.lun = msg->rsp[7] & 3; | |
1896 | ||
1897 | /* It's a response from a remote entity. Look up the sequence | |
1898 | number and handle the response. */ | |
1899 | if (intf_find_seq(intf, | |
1900 | msg->rsp[7] >> 2, | |
1901 | msg->rsp[3] & 0x0f, | |
1902 | msg->rsp[8], | |
1903 | (msg->rsp[4] >> 2) & (~1), | |
1904 | (struct ipmi_addr *) &(ipmb_addr), | |
1905 | &recv_msg)) | |
1906 | { | |
1907 | /* We were unable to find the sequence number, | |
1908 | so just nuke the message. */ | |
1909 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1910 | intf->unhandled_ipmb_responses++; | |
1911 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1912 | return 0; | |
1913 | } | |
1914 | ||
1915 | memcpy(recv_msg->msg_data, | |
1916 | &(msg->rsp[9]), | |
1917 | msg->rsp_size - 9); | |
1918 | /* THe other fields matched, so no need to set them, except | |
1919 | for netfn, which needs to be the response that was | |
1920 | returned, not the request value. */ | |
1921 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
1922 | recv_msg->msg.data = recv_msg->msg_data; | |
1923 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
1924 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
1925 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1926 | intf->handled_ipmb_responses++; | |
1927 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1928 | deliver_response(recv_msg); | |
1929 | ||
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
1934 | struct ipmi_smi_msg *msg) | |
1935 | { | |
1936 | struct cmd_rcvr *rcvr; | |
1937 | int rv = 0; | |
1938 | unsigned char netfn; | |
1939 | unsigned char cmd; | |
1940 | ipmi_user_t user = NULL; | |
1941 | struct ipmi_ipmb_addr *ipmb_addr; | |
1942 | struct ipmi_recv_msg *recv_msg; | |
1943 | unsigned long flags; | |
1944 | ||
1945 | if (msg->rsp_size < 10) { | |
1946 | /* Message not big enough, just ignore it. */ | |
1947 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1948 | intf->invalid_commands++; | |
1949 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | if (msg->rsp[2] != 0) { | |
1954 | /* An error getting the response, just ignore it. */ | |
1955 | return 0; | |
1956 | } | |
1957 | ||
1958 | netfn = msg->rsp[4] >> 2; | |
1959 | cmd = msg->rsp[8]; | |
1960 | ||
1961 | read_lock(&(intf->cmd_rcvr_lock)); | |
1962 | ||
1963 | if (intf->all_cmd_rcvr) { | |
1964 | user = intf->all_cmd_rcvr; | |
1965 | } else { | |
1966 | /* Find the command/netfn. */ | |
1967 | list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) { | |
1968 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { | |
1969 | user = rcvr->user; | |
1970 | break; | |
1971 | } | |
1972 | } | |
1973 | } | |
1974 | read_unlock(&(intf->cmd_rcvr_lock)); | |
1975 | ||
1976 | if (user == NULL) { | |
1977 | /* We didn't find a user, deliver an error response. */ | |
1978 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1979 | intf->unhandled_commands++; | |
1980 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1981 | ||
1982 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1983 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
1984 | msg->data[2] = msg->rsp[3]; | |
1985 | msg->data[3] = msg->rsp[6]; | |
1986 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); | |
1987 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); | |
1988 | msg->data[6] = intf->my_address; | |
1989 | /* rqseq/lun */ | |
1990 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1991 | msg->data[8] = msg->rsp[8]; /* cmd */ | |
1992 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
1993 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
1994 | msg->data_size = 11; | |
1995 | ||
1996 | #ifdef DEBUG_MSGING | |
1997 | { | |
1998 | int m; | |
1999 | printk("Invalid command:"); | |
2000 | for (m=0; m<msg->data_size; m++) | |
2001 | printk(" %2.2x", msg->data[m]); | |
2002 | printk("\n"); | |
2003 | } | |
2004 | #endif | |
2005 | intf->handlers->sender(intf->send_info, msg, 0); | |
2006 | ||
2007 | rv = -1; /* We used the message, so return the value that | |
2008 | causes it to not be freed or queued. */ | |
2009 | } else { | |
2010 | /* Deliver the message to the user. */ | |
2011 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2012 | intf->handled_commands++; | |
2013 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2014 | ||
2015 | recv_msg = ipmi_alloc_recv_msg(); | |
2016 | if (! recv_msg) { | |
2017 | /* We couldn't allocate memory for the | |
2018 | message, so requeue it for handling | |
2019 | later. */ | |
2020 | rv = 1; | |
2021 | } else { | |
2022 | /* Extract the source address from the data. */ | |
2023 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
2024 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
2025 | ipmb_addr->slave_addr = msg->rsp[6]; | |
2026 | ipmb_addr->lun = msg->rsp[7] & 3; | |
2027 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
2028 | ||
2029 | /* Extract the rest of the message information | |
2030 | from the IPMB header.*/ | |
2031 | recv_msg->user = user; | |
2032 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
2033 | recv_msg->msgid = msg->rsp[7] >> 2; | |
2034 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
2035 | recv_msg->msg.cmd = msg->rsp[8]; | |
2036 | recv_msg->msg.data = recv_msg->msg_data; | |
2037 | ||
2038 | /* We chop off 10, not 9 bytes because the checksum | |
2039 | at the end also needs to be removed. */ | |
2040 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
2041 | memcpy(recv_msg->msg_data, | |
2042 | &(msg->rsp[9]), | |
2043 | msg->rsp_size - 10); | |
2044 | deliver_response(recv_msg); | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | return rv; | |
2049 | } | |
2050 | ||
2051 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
2052 | struct ipmi_smi_msg *msg) | |
2053 | { | |
2054 | struct ipmi_lan_addr lan_addr; | |
2055 | struct ipmi_recv_msg *recv_msg; | |
2056 | unsigned long flags; | |
2057 | ||
2058 | ||
2059 | /* This is 13, not 12, because the response must contain a | |
2060 | * completion code. */ | |
2061 | if (msg->rsp_size < 13) { | |
2062 | /* Message not big enough, just ignore it. */ | |
2063 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2064 | intf->invalid_lan_responses++; | |
2065 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2066 | return 0; | |
2067 | } | |
2068 | ||
2069 | if (msg->rsp[2] != 0) { | |
2070 | /* An error getting the response, just ignore it. */ | |
2071 | return 0; | |
2072 | } | |
2073 | ||
2074 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
2075 | lan_addr.session_handle = msg->rsp[4]; | |
2076 | lan_addr.remote_SWID = msg->rsp[8]; | |
2077 | lan_addr.local_SWID = msg->rsp[5]; | |
2078 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
2079 | lan_addr.privilege = msg->rsp[3] >> 4; | |
2080 | lan_addr.lun = msg->rsp[9] & 3; | |
2081 | ||
2082 | /* It's a response from a remote entity. Look up the sequence | |
2083 | number and handle the response. */ | |
2084 | if (intf_find_seq(intf, | |
2085 | msg->rsp[9] >> 2, | |
2086 | msg->rsp[3] & 0x0f, | |
2087 | msg->rsp[10], | |
2088 | (msg->rsp[6] >> 2) & (~1), | |
2089 | (struct ipmi_addr *) &(lan_addr), | |
2090 | &recv_msg)) | |
2091 | { | |
2092 | /* We were unable to find the sequence number, | |
2093 | so just nuke the message. */ | |
2094 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2095 | intf->unhandled_lan_responses++; | |
2096 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2097 | return 0; | |
2098 | } | |
2099 | ||
2100 | memcpy(recv_msg->msg_data, | |
2101 | &(msg->rsp[11]), | |
2102 | msg->rsp_size - 11); | |
2103 | /* The other fields matched, so no need to set them, except | |
2104 | for netfn, which needs to be the response that was | |
2105 | returned, not the request value. */ | |
2106 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
2107 | recv_msg->msg.data = recv_msg->msg_data; | |
2108 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
2109 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2110 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2111 | intf->handled_lan_responses++; | |
2112 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2113 | deliver_response(recv_msg); | |
2114 | ||
2115 | return 0; | |
2116 | } | |
2117 | ||
2118 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
2119 | struct ipmi_smi_msg *msg) | |
2120 | { | |
2121 | struct cmd_rcvr *rcvr; | |
2122 | int rv = 0; | |
2123 | unsigned char netfn; | |
2124 | unsigned char cmd; | |
2125 | ipmi_user_t user = NULL; | |
2126 | struct ipmi_lan_addr *lan_addr; | |
2127 | struct ipmi_recv_msg *recv_msg; | |
2128 | unsigned long flags; | |
2129 | ||
2130 | if (msg->rsp_size < 12) { | |
2131 | /* Message not big enough, just ignore it. */ | |
2132 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2133 | intf->invalid_commands++; | |
2134 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2135 | return 0; | |
2136 | } | |
2137 | ||
2138 | if (msg->rsp[2] != 0) { | |
2139 | /* An error getting the response, just ignore it. */ | |
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | netfn = msg->rsp[6] >> 2; | |
2144 | cmd = msg->rsp[10]; | |
2145 | ||
2146 | read_lock(&(intf->cmd_rcvr_lock)); | |
2147 | ||
2148 | if (intf->all_cmd_rcvr) { | |
2149 | user = intf->all_cmd_rcvr; | |
2150 | } else { | |
2151 | /* Find the command/netfn. */ | |
2152 | list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) { | |
2153 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) { | |
2154 | user = rcvr->user; | |
2155 | break; | |
2156 | } | |
2157 | } | |
2158 | } | |
2159 | read_unlock(&(intf->cmd_rcvr_lock)); | |
2160 | ||
2161 | if (user == NULL) { | |
2162 | /* We didn't find a user, deliver an error response. */ | |
2163 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2164 | intf->unhandled_commands++; | |
2165 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2166 | ||
2167 | rv = 0; /* Don't do anything with these messages, just | |
2168 | allow them to be freed. */ | |
2169 | } else { | |
2170 | /* Deliver the message to the user. */ | |
2171 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2172 | intf->handled_commands++; | |
2173 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2174 | ||
2175 | recv_msg = ipmi_alloc_recv_msg(); | |
2176 | if (! recv_msg) { | |
2177 | /* We couldn't allocate memory for the | |
2178 | message, so requeue it for handling | |
2179 | later. */ | |
2180 | rv = 1; | |
2181 | } else { | |
2182 | /* Extract the source address from the data. */ | |
2183 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
2184 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
2185 | lan_addr->session_handle = msg->rsp[4]; | |
2186 | lan_addr->remote_SWID = msg->rsp[8]; | |
2187 | lan_addr->local_SWID = msg->rsp[5]; | |
2188 | lan_addr->lun = msg->rsp[9] & 3; | |
2189 | lan_addr->channel = msg->rsp[3] & 0xf; | |
2190 | lan_addr->privilege = msg->rsp[3] >> 4; | |
2191 | ||
2192 | /* Extract the rest of the message information | |
2193 | from the IPMB header.*/ | |
2194 | recv_msg->user = user; | |
2195 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
2196 | recv_msg->msgid = msg->rsp[9] >> 2; | |
2197 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
2198 | recv_msg->msg.cmd = msg->rsp[10]; | |
2199 | recv_msg->msg.data = recv_msg->msg_data; | |
2200 | ||
2201 | /* We chop off 12, not 11 bytes because the checksum | |
2202 | at the end also needs to be removed. */ | |
2203 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
2204 | memcpy(recv_msg->msg_data, | |
2205 | &(msg->rsp[11]), | |
2206 | msg->rsp_size - 12); | |
2207 | deliver_response(recv_msg); | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | return rv; | |
2212 | } | |
2213 | ||
2214 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, | |
2215 | struct ipmi_smi_msg *msg) | |
2216 | { | |
2217 | struct ipmi_system_interface_addr *smi_addr; | |
2218 | ||
2219 | recv_msg->msgid = 0; | |
2220 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
2221 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2222 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
2223 | smi_addr->lun = msg->rsp[0] & 3; | |
2224 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
2225 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
2226 | recv_msg->msg.cmd = msg->rsp[1]; | |
2227 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
2228 | recv_msg->msg.data = recv_msg->msg_data; | |
2229 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
2230 | } | |
2231 | ||
2232 | /* This will be called with the intf->users_lock read-locked, so no need | |
2233 | to do that here. */ | |
2234 | static int handle_read_event_rsp(ipmi_smi_t intf, | |
2235 | struct ipmi_smi_msg *msg) | |
2236 | { | |
2237 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
2238 | struct list_head msgs; | |
2239 | ipmi_user_t user; | |
2240 | int rv = 0; | |
2241 | int deliver_count = 0; | |
2242 | unsigned long flags; | |
2243 | ||
2244 | if (msg->rsp_size < 19) { | |
2245 | /* Message is too small to be an IPMB event. */ | |
2246 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2247 | intf->invalid_events++; | |
2248 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2249 | return 0; | |
2250 | } | |
2251 | ||
2252 | if (msg->rsp[2] != 0) { | |
2253 | /* An error getting the event, just ignore it. */ | |
2254 | return 0; | |
2255 | } | |
2256 | ||
2257 | INIT_LIST_HEAD(&msgs); | |
2258 | ||
2259 | spin_lock_irqsave(&(intf->events_lock), flags); | |
2260 | ||
2261 | spin_lock(&intf->counter_lock); | |
2262 | intf->events++; | |
2263 | spin_unlock(&intf->counter_lock); | |
2264 | ||
2265 | /* Allocate and fill in one message for every user that is getting | |
2266 | events. */ | |
2267 | list_for_each_entry(user, &(intf->users), link) { | |
2268 | if (! user->gets_events) | |
2269 | continue; | |
2270 | ||
2271 | recv_msg = ipmi_alloc_recv_msg(); | |
2272 | if (! recv_msg) { | |
2273 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
2274 | list_del(&recv_msg->link); | |
2275 | ipmi_free_recv_msg(recv_msg); | |
2276 | } | |
2277 | /* We couldn't allocate memory for the | |
2278 | message, so requeue it for handling | |
2279 | later. */ | |
2280 | rv = 1; | |
2281 | goto out; | |
2282 | } | |
2283 | ||
2284 | deliver_count++; | |
2285 | ||
2286 | copy_event_into_recv_msg(recv_msg, msg); | |
2287 | recv_msg->user = user; | |
2288 | list_add_tail(&(recv_msg->link), &msgs); | |
2289 | } | |
2290 | ||
2291 | if (deliver_count) { | |
2292 | /* Now deliver all the messages. */ | |
2293 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
2294 | list_del(&recv_msg->link); | |
2295 | deliver_response(recv_msg); | |
2296 | } | |
2297 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
2298 | /* No one to receive the message, put it in queue if there's | |
2299 | not already too many things in the queue. */ | |
2300 | recv_msg = ipmi_alloc_recv_msg(); | |
2301 | if (! recv_msg) { | |
2302 | /* We couldn't allocate memory for the | |
2303 | message, so requeue it for handling | |
2304 | later. */ | |
2305 | rv = 1; | |
2306 | goto out; | |
2307 | } | |
2308 | ||
2309 | copy_event_into_recv_msg(recv_msg, msg); | |
2310 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
2311 | } else { | |
2312 | /* There's too many things in the queue, discard this | |
2313 | message. */ | |
2314 | printk(KERN_WARNING PFX "Event queue full, discarding an" | |
2315 | " incoming event\n"); | |
2316 | } | |
2317 | ||
2318 | out: | |
2319 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
2320 | ||
2321 | return rv; | |
2322 | } | |
2323 | ||
2324 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
2325 | struct ipmi_smi_msg *msg) | |
2326 | { | |
2327 | struct ipmi_recv_msg *recv_msg; | |
2328 | int found = 0; | |
2329 | struct ipmi_user *user; | |
2330 | unsigned long flags; | |
2331 | ||
2332 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
2333 | ||
2334 | /* Make sure the user still exists. */ | |
2335 | list_for_each_entry(user, &(intf->users), link) { | |
2336 | if (user == recv_msg->user) { | |
2337 | /* Found it, so we can deliver it */ | |
2338 | found = 1; | |
2339 | break; | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | if (!found) { | |
2344 | /* Special handling for NULL users. */ | |
2345 | if (!recv_msg->user && intf->null_user_handler){ | |
2346 | intf->null_user_handler(intf, msg); | |
2347 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2348 | intf->handled_local_responses++; | |
2349 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2350 | }else{ | |
2351 | /* The user for the message went away, so give up. */ | |
2352 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2353 | intf->unhandled_local_responses++; | |
2354 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2355 | } | |
2356 | ipmi_free_recv_msg(recv_msg); | |
2357 | } else { | |
2358 | struct ipmi_system_interface_addr *smi_addr; | |
2359 | ||
2360 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2361 | intf->handled_local_responses++; | |
2362 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2363 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2364 | recv_msg->msgid = msg->msgid; | |
2365 | smi_addr = ((struct ipmi_system_interface_addr *) | |
2366 | &(recv_msg->addr)); | |
2367 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2368 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
2369 | smi_addr->lun = msg->rsp[0] & 3; | |
2370 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
2371 | recv_msg->msg.cmd = msg->rsp[1]; | |
2372 | memcpy(recv_msg->msg_data, | |
2373 | &(msg->rsp[2]), | |
2374 | msg->rsp_size - 2); | |
2375 | recv_msg->msg.data = recv_msg->msg_data; | |
2376 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
2377 | deliver_response(recv_msg); | |
2378 | } | |
2379 | ||
2380 | return 0; | |
2381 | } | |
2382 | ||
2383 | /* Handle a new message. Return 1 if the message should be requeued, | |
2384 | 0 if the message should be freed, or -1 if the message should not | |
2385 | be freed or requeued. */ | |
2386 | static int handle_new_recv_msg(ipmi_smi_t intf, | |
2387 | struct ipmi_smi_msg *msg) | |
2388 | { | |
2389 | int requeue; | |
2390 | int chan; | |
2391 | ||
2392 | #ifdef DEBUG_MSGING | |
2393 | int m; | |
2394 | printk("Recv:"); | |
2395 | for (m=0; m<msg->rsp_size; m++) | |
2396 | printk(" %2.2x", msg->rsp[m]); | |
2397 | printk("\n"); | |
2398 | #endif | |
2399 | if (msg->rsp_size < 2) { | |
2400 | /* Message is too small to be correct. */ | |
2401 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
2402 | " for netfn %x cmd %x, got %d bytes\n", | |
2403 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
2404 | ||
2405 | /* Generate an error response for the message. */ | |
2406 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
2407 | msg->rsp[1] = msg->data[1]; | |
2408 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
2409 | msg->rsp_size = 3; | |
2410 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))/* Netfn */ | |
2411 | || (msg->rsp[1] != msg->data[1])) /* Command */ | |
2412 | { | |
2413 | /* The response is not even marginally correct. */ | |
2414 | printk(KERN_WARNING PFX "BMC returned incorrect response," | |
2415 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
2416 | (msg->data[0] >> 2) | 1, msg->data[1], | |
2417 | msg->rsp[0] >> 2, msg->rsp[1]); | |
2418 | ||
2419 | /* Generate an error response for the message. */ | |
2420 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
2421 | msg->rsp[1] = msg->data[1]; | |
2422 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
2423 | msg->rsp_size = 3; | |
2424 | } | |
2425 | ||
2426 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
2427 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
2428 | && (msg->user_data != NULL)) | |
2429 | { | |
2430 | /* It's a response to a response we sent. For this we | |
2431 | deliver a send message response to the user. */ | |
2432 | struct ipmi_recv_msg *recv_msg = msg->user_data; | |
2433 | ||
2434 | requeue = 0; | |
2435 | if (msg->rsp_size < 2) | |
2436 | /* Message is too small to be correct. */ | |
2437 | goto out; | |
2438 | ||
2439 | chan = msg->data[2] & 0x0f; | |
2440 | if (chan >= IPMI_MAX_CHANNELS) | |
2441 | /* Invalid channel number */ | |
2442 | goto out; | |
2443 | ||
2444 | if (recv_msg) { | |
2445 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
2446 | recv_msg->msg.data = recv_msg->msg_data; | |
2447 | recv_msg->msg.data_len = 1; | |
2448 | recv_msg->msg_data[0] = msg->rsp[2]; | |
2449 | deliver_response(recv_msg); | |
2450 | } | |
2451 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
2452 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) | |
2453 | { | |
2454 | /* It's from the receive queue. */ | |
2455 | chan = msg->rsp[3] & 0xf; | |
2456 | if (chan >= IPMI_MAX_CHANNELS) { | |
2457 | /* Invalid channel number */ | |
2458 | requeue = 0; | |
2459 | goto out; | |
2460 | } | |
2461 | ||
2462 | switch (intf->channels[chan].medium) { | |
2463 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
2464 | if (msg->rsp[4] & 0x04) { | |
2465 | /* It's a response, so find the | |
2466 | requesting message and send it up. */ | |
2467 | requeue = handle_ipmb_get_msg_rsp(intf, msg); | |
2468 | } else { | |
2469 | /* It's a command to the SMS from some other | |
2470 | entity. Handle that. */ | |
2471 | requeue = handle_ipmb_get_msg_cmd(intf, msg); | |
2472 | } | |
2473 | break; | |
2474 | ||
2475 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
2476 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
2477 | if (msg->rsp[6] & 0x04) { | |
2478 | /* It's a response, so find the | |
2479 | requesting message and send it up. */ | |
2480 | requeue = handle_lan_get_msg_rsp(intf, msg); | |
2481 | } else { | |
2482 | /* It's a command to the SMS from some other | |
2483 | entity. Handle that. */ | |
2484 | requeue = handle_lan_get_msg_cmd(intf, msg); | |
2485 | } | |
2486 | break; | |
2487 | ||
2488 | default: | |
2489 | /* We don't handle the channel type, so just | |
2490 | * free the message. */ | |
2491 | requeue = 0; | |
2492 | } | |
2493 | ||
2494 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
2495 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) | |
2496 | { | |
2497 | /* It's an asyncronous event. */ | |
2498 | requeue = handle_read_event_rsp(intf, msg); | |
2499 | } else { | |
2500 | /* It's a response from the local BMC. */ | |
2501 | requeue = handle_bmc_rsp(intf, msg); | |
2502 | } | |
2503 | ||
2504 | out: | |
2505 | return requeue; | |
2506 | } | |
2507 | ||
2508 | /* Handle a new message from the lower layer. */ | |
2509 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
2510 | struct ipmi_smi_msg *msg) | |
2511 | { | |
2512 | unsigned long flags; | |
2513 | int rv; | |
2514 | ||
2515 | ||
2516 | /* Lock the user lock so the user can't go away while we are | |
2517 | working on it. */ | |
2518 | read_lock(&(intf->users_lock)); | |
2519 | ||
2520 | if ((msg->data_size >= 2) | |
2521 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
2522 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
2523 | && (msg->user_data == NULL)) { | |
2524 | /* This is the local response to a command send, start | |
2525 | the timer for these. The user_data will not be | |
2526 | NULL if this is a response send, and we will let | |
2527 | response sends just go through. */ | |
2528 | ||
2529 | /* Check for errors, if we get certain errors (ones | |
2530 | that mean basically we can try again later), we | |
2531 | ignore them and start the timer. Otherwise we | |
2532 | report the error immediately. */ | |
2533 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) | |
2534 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
2535 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)) | |
2536 | { | |
2537 | int chan = msg->rsp[3] & 0xf; | |
2538 | ||
2539 | /* Got an error sending the message, handle it. */ | |
2540 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2541 | if (chan >= IPMI_MAX_CHANNELS) | |
2542 | ; /* This shouldn't happen */ | |
2543 | else if ((intf->channels[chan].medium | |
2544 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
2545 | || (intf->channels[chan].medium | |
2546 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
2547 | intf->sent_lan_command_errs++; | |
2548 | else | |
2549 | intf->sent_ipmb_command_errs++; | |
2550 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2551 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); | |
2552 | } else { | |
2553 | /* The message was sent, start the timer. */ | |
2554 | intf_start_seq_timer(intf, msg->msgid); | |
2555 | } | |
2556 | ||
2557 | ipmi_free_smi_msg(msg); | |
2558 | goto out_unlock; | |
2559 | } | |
2560 | ||
2561 | /* To preserve message order, if the list is not empty, we | |
2562 | tack this message onto the end of the list. */ | |
2563 | spin_lock_irqsave(&(intf->waiting_msgs_lock), flags); | |
2564 | if (!list_empty(&(intf->waiting_msgs))) { | |
2565 | list_add_tail(&(msg->link), &(intf->waiting_msgs)); | |
2566 | spin_unlock(&(intf->waiting_msgs_lock)); | |
2567 | goto out_unlock; | |
2568 | } | |
2569 | spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags); | |
2570 | ||
2571 | rv = handle_new_recv_msg(intf, msg); | |
2572 | if (rv > 0) { | |
2573 | /* Could not handle the message now, just add it to a | |
2574 | list to handle later. */ | |
2575 | spin_lock(&(intf->waiting_msgs_lock)); | |
2576 | list_add_tail(&(msg->link), &(intf->waiting_msgs)); | |
2577 | spin_unlock(&(intf->waiting_msgs_lock)); | |
2578 | } else if (rv == 0) { | |
2579 | ipmi_free_smi_msg(msg); | |
2580 | } | |
2581 | ||
2582 | out_unlock: | |
2583 | read_unlock(&(intf->users_lock)); | |
2584 | } | |
2585 | ||
2586 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
2587 | { | |
2588 | ipmi_user_t user; | |
2589 | ||
2590 | read_lock(&(intf->users_lock)); | |
2591 | list_for_each_entry(user, &(intf->users), link) { | |
2592 | if (! user->handler->ipmi_watchdog_pretimeout) | |
2593 | continue; | |
2594 | ||
2595 | user->handler->ipmi_watchdog_pretimeout(user->handler_data); | |
2596 | } | |
2597 | read_unlock(&(intf->users_lock)); | |
2598 | } | |
2599 | ||
2600 | static void | |
2601 | handle_msg_timeout(struct ipmi_recv_msg *msg) | |
2602 | { | |
2603 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2604 | msg->msg_data[0] = IPMI_TIMEOUT_COMPLETION_CODE; | |
2605 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
2606 | msg->msg.data_len = 1; | |
2607 | msg->msg.data = msg->msg_data; | |
2608 | deliver_response(msg); | |
2609 | } | |
2610 | ||
882fe011 CM |
2611 | static struct ipmi_smi_msg * |
2612 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
2613 | unsigned char seq, long seqid) | |
1da177e4 | 2614 | { |
882fe011 | 2615 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 LT |
2616 | if (!smi_msg) |
2617 | /* If we can't allocate the message, then just return, we | |
2618 | get 4 retries, so this should be ok. */ | |
882fe011 | 2619 | return NULL; |
1da177e4 LT |
2620 | |
2621 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
2622 | smi_msg->data_size = recv_msg->msg.data_len; | |
2623 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
2624 | ||
1da177e4 LT |
2625 | #ifdef DEBUG_MSGING |
2626 | { | |
2627 | int m; | |
2628 | printk("Resend: "); | |
2629 | for (m=0; m<smi_msg->data_size; m++) | |
2630 | printk(" %2.2x", smi_msg->data[m]); | |
2631 | printk("\n"); | |
2632 | } | |
2633 | #endif | |
882fe011 | 2634 | return smi_msg; |
1da177e4 LT |
2635 | } |
2636 | ||
2637 | static void | |
2638 | ipmi_timeout_handler(long timeout_period) | |
2639 | { | |
2640 | ipmi_smi_t intf; | |
2641 | struct list_head timeouts; | |
2642 | struct ipmi_recv_msg *msg, *msg2; | |
2643 | struct ipmi_smi_msg *smi_msg, *smi_msg2; | |
2644 | unsigned long flags; | |
2645 | int i, j; | |
2646 | ||
2647 | INIT_LIST_HEAD(&timeouts); | |
2648 | ||
2649 | spin_lock(&interfaces_lock); | |
2650 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
2651 | intf = ipmi_interfaces[i]; | |
2652 | if (intf == NULL) | |
2653 | continue; | |
2654 | ||
2655 | read_lock(&(intf->users_lock)); | |
2656 | ||
2657 | /* See if any waiting messages need to be processed. */ | |
2658 | spin_lock_irqsave(&(intf->waiting_msgs_lock), flags); | |
2659 | list_for_each_entry_safe(smi_msg, smi_msg2, &(intf->waiting_msgs), link) { | |
2660 | if (! handle_new_recv_msg(intf, smi_msg)) { | |
2661 | list_del(&smi_msg->link); | |
2662 | ipmi_free_smi_msg(smi_msg); | |
2663 | } else { | |
2664 | /* To preserve message order, quit if we | |
2665 | can't handle a message. */ | |
2666 | break; | |
2667 | } | |
2668 | } | |
2669 | spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags); | |
2670 | ||
2671 | /* Go through the seq table and find any messages that | |
2672 | have timed out, putting them in the timeouts | |
2673 | list. */ | |
2674 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
2675 | for (j=0; j<IPMI_IPMB_NUM_SEQ; j++) { | |
2676 | struct seq_table *ent = &(intf->seq_table[j]); | |
2677 | if (!ent->inuse) | |
2678 | continue; | |
2679 | ||
2680 | ent->timeout -= timeout_period; | |
2681 | if (ent->timeout > 0) | |
2682 | continue; | |
2683 | ||
2684 | if (ent->retries_left == 0) { | |
2685 | /* The message has used all its retries. */ | |
2686 | ent->inuse = 0; | |
2687 | msg = ent->recv_msg; | |
2688 | list_add_tail(&(msg->link), &timeouts); | |
2689 | spin_lock(&intf->counter_lock); | |
2690 | if (ent->broadcast) | |
2691 | intf->timed_out_ipmb_broadcasts++; | |
2692 | else if (ent->recv_msg->addr.addr_type | |
2693 | == IPMI_LAN_ADDR_TYPE) | |
2694 | intf->timed_out_lan_commands++; | |
2695 | else | |
2696 | intf->timed_out_ipmb_commands++; | |
2697 | spin_unlock(&intf->counter_lock); | |
2698 | } else { | |
882fe011 | 2699 | struct ipmi_smi_msg *smi_msg; |
1da177e4 LT |
2700 | /* More retries, send again. */ |
2701 | ||
2702 | /* Start with the max timer, set to normal | |
2703 | timer after the message is sent. */ | |
2704 | ent->timeout = MAX_MSG_TIMEOUT; | |
2705 | ent->retries_left--; | |
1da177e4 LT |
2706 | spin_lock(&intf->counter_lock); |
2707 | if (ent->recv_msg->addr.addr_type | |
2708 | == IPMI_LAN_ADDR_TYPE) | |
2709 | intf->retransmitted_lan_commands++; | |
2710 | else | |
2711 | intf->retransmitted_ipmb_commands++; | |
2712 | spin_unlock(&intf->counter_lock); | |
882fe011 CM |
2713 | smi_msg = smi_from_recv_msg(intf, |
2714 | ent->recv_msg, j, ent->seqid); | |
2715 | if(!smi_msg) | |
2716 | continue; | |
2717 | ||
2718 | spin_unlock_irqrestore(&(intf->seq_lock),flags); | |
2719 | /* Send the new message. We send with a zero | |
2720 | * priority. It timed out, I doubt time is | |
2721 | * that critical now, and high priority | |
2722 | * messages are really only for messages to the | |
2723 | * local MC, which don't get resent. */ | |
2724 | intf->handlers->sender(intf->send_info, | |
2725 | smi_msg, 0); | |
2726 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1da177e4 LT |
2727 | } |
2728 | } | |
2729 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
2730 | ||
2731 | list_for_each_entry_safe(msg, msg2, &timeouts, link) { | |
2732 | handle_msg_timeout(msg); | |
2733 | } | |
2734 | ||
2735 | read_unlock(&(intf->users_lock)); | |
2736 | } | |
2737 | spin_unlock(&interfaces_lock); | |
2738 | } | |
2739 | ||
2740 | static void ipmi_request_event(void) | |
2741 | { | |
2742 | ipmi_smi_t intf; | |
2743 | int i; | |
2744 | ||
2745 | spin_lock(&interfaces_lock); | |
2746 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
2747 | intf = ipmi_interfaces[i]; | |
2748 | if (intf == NULL) | |
2749 | continue; | |
2750 | ||
2751 | intf->handlers->request_events(intf->send_info); | |
2752 | } | |
2753 | spin_unlock(&interfaces_lock); | |
2754 | } | |
2755 | ||
2756 | static struct timer_list ipmi_timer; | |
2757 | ||
2758 | /* Call every ~100 ms. */ | |
2759 | #define IPMI_TIMEOUT_TIME 100 | |
2760 | ||
2761 | /* How many jiffies does it take to get to the timeout time. */ | |
2762 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
2763 | ||
2764 | /* Request events from the queue every second (this is the number of | |
2765 | IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
2766 | future, IPMI will add a way to know immediately if an event is in | |
2767 | the queue and this silliness can go away. */ | |
2768 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
2769 | ||
8f43f84f | 2770 | static atomic_t stop_operation; |
1da177e4 LT |
2771 | static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
2772 | ||
2773 | static void ipmi_timeout(unsigned long data) | |
2774 | { | |
8f43f84f | 2775 | if (atomic_read(&stop_operation)) |
1da177e4 | 2776 | return; |
1da177e4 LT |
2777 | |
2778 | ticks_to_req_ev--; | |
2779 | if (ticks_to_req_ev == 0) { | |
2780 | ipmi_request_event(); | |
2781 | ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
2782 | } | |
2783 | ||
2784 | ipmi_timeout_handler(IPMI_TIMEOUT_TIME); | |
2785 | ||
8f43f84f | 2786 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
1da177e4 LT |
2787 | } |
2788 | ||
2789 | ||
2790 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
2791 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
2792 | ||
2793 | /* FIXME - convert these to slabs. */ | |
2794 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
2795 | { | |
2796 | atomic_dec(&smi_msg_inuse_count); | |
2797 | kfree(msg); | |
2798 | } | |
2799 | ||
2800 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
2801 | { | |
2802 | struct ipmi_smi_msg *rv; | |
2803 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
2804 | if (rv) { | |
2805 | rv->done = free_smi_msg; | |
2806 | rv->user_data = NULL; | |
2807 | atomic_inc(&smi_msg_inuse_count); | |
2808 | } | |
2809 | return rv; | |
2810 | } | |
2811 | ||
2812 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
2813 | { | |
2814 | atomic_dec(&recv_msg_inuse_count); | |
2815 | kfree(msg); | |
2816 | } | |
2817 | ||
2818 | struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) | |
2819 | { | |
2820 | struct ipmi_recv_msg *rv; | |
2821 | ||
2822 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
2823 | if (rv) { | |
2824 | rv->done = free_recv_msg; | |
2825 | atomic_inc(&recv_msg_inuse_count); | |
2826 | } | |
2827 | return rv; | |
2828 | } | |
2829 | ||
2830 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
2831 | ||
2832 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) | |
2833 | { | |
2834 | } | |
2835 | ||
2836 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
2837 | { | |
2838 | } | |
2839 | ||
2840 | #ifdef CONFIG_IPMI_PANIC_STRING | |
2841 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_smi_msg *msg) | |
2842 | { | |
2843 | if ((msg->rsp[0] == (IPMI_NETFN_SENSOR_EVENT_RESPONSE << 2)) | |
2844 | && (msg->rsp[1] == IPMI_GET_EVENT_RECEIVER_CMD) | |
2845 | && (msg->rsp[2] == IPMI_CC_NO_ERROR)) | |
2846 | { | |
2847 | /* A get event receiver command, save it. */ | |
2848 | intf->event_receiver = msg->rsp[3]; | |
2849 | intf->event_receiver_lun = msg->rsp[4] & 0x3; | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_smi_msg *msg) | |
2854 | { | |
2855 | if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2)) | |
2856 | && (msg->rsp[1] == IPMI_GET_DEVICE_ID_CMD) | |
2857 | && (msg->rsp[2] == IPMI_CC_NO_ERROR)) | |
2858 | { | |
2859 | /* A get device id command, save if we are an event | |
2860 | receiver or generator. */ | |
2861 | intf->local_sel_device = (msg->rsp[8] >> 2) & 1; | |
2862 | intf->local_event_generator = (msg->rsp[8] >> 5) & 1; | |
2863 | } | |
2864 | } | |
2865 | #endif | |
2866 | ||
2867 | static void send_panic_events(char *str) | |
2868 | { | |
2869 | struct kernel_ipmi_msg msg; | |
2870 | ipmi_smi_t intf; | |
2871 | unsigned char data[16]; | |
2872 | int i; | |
2873 | struct ipmi_system_interface_addr *si; | |
2874 | struct ipmi_addr addr; | |
2875 | struct ipmi_smi_msg smi_msg; | |
2876 | struct ipmi_recv_msg recv_msg; | |
2877 | ||
2878 | si = (struct ipmi_system_interface_addr *) &addr; | |
2879 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2880 | si->channel = IPMI_BMC_CHANNEL; | |
2881 | si->lun = 0; | |
2882 | ||
2883 | /* Fill in an event telling that we have failed. */ | |
2884 | msg.netfn = 0x04; /* Sensor or Event. */ | |
2885 | msg.cmd = 2; /* Platform event command. */ | |
2886 | msg.data = data; | |
2887 | msg.data_len = 8; | |
2888 | data[0] = 0x21; /* Kernel generator ID, IPMI table 5-4 */ | |
2889 | data[1] = 0x03; /* This is for IPMI 1.0. */ | |
2890 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
2891 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
2892 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
2893 | ||
2894 | /* Put a few breadcrumbs in. Hopefully later we can add more things | |
2895 | to make the panic events more useful. */ | |
2896 | if (str) { | |
2897 | data[3] = str[0]; | |
2898 | data[6] = str[1]; | |
2899 | data[7] = str[2]; | |
2900 | } | |
2901 | ||
2902 | smi_msg.done = dummy_smi_done_handler; | |
2903 | recv_msg.done = dummy_recv_done_handler; | |
2904 | ||
2905 | /* For every registered interface, send the event. */ | |
2906 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
2907 | intf = ipmi_interfaces[i]; | |
2908 | if (intf == NULL) | |
2909 | continue; | |
2910 | ||
2911 | /* Send the event announcing the panic. */ | |
2912 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
2913 | i_ipmi_request(NULL, | |
2914 | intf, | |
2915 | &addr, | |
2916 | 0, | |
2917 | &msg, | |
2918 | NULL, | |
2919 | &smi_msg, | |
2920 | &recv_msg, | |
2921 | 0, | |
2922 | intf->my_address, | |
2923 | intf->my_lun, | |
2924 | 0, 1); /* Don't retry, and don't wait. */ | |
2925 | } | |
2926 | ||
2927 | #ifdef CONFIG_IPMI_PANIC_STRING | |
2928 | /* On every interface, dump a bunch of OEM event holding the | |
2929 | string. */ | |
2930 | if (!str) | |
2931 | return; | |
2932 | ||
2933 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
2934 | char *p = str; | |
2935 | struct ipmi_ipmb_addr *ipmb; | |
2936 | int j; | |
2937 | ||
2938 | intf = ipmi_interfaces[i]; | |
2939 | if (intf == NULL) | |
2940 | continue; | |
2941 | ||
2942 | /* First job here is to figure out where to send the | |
2943 | OEM events. There's no way in IPMI to send OEM | |
2944 | events using an event send command, so we have to | |
2945 | find the SEL to put them in and stick them in | |
2946 | there. */ | |
2947 | ||
2948 | /* Get capabilities from the get device id. */ | |
2949 | intf->local_sel_device = 0; | |
2950 | intf->local_event_generator = 0; | |
2951 | intf->event_receiver = 0; | |
2952 | ||
2953 | /* Request the device info from the local MC. */ | |
2954 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2955 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
2956 | msg.data = NULL; | |
2957 | msg.data_len = 0; | |
2958 | intf->null_user_handler = device_id_fetcher; | |
2959 | i_ipmi_request(NULL, | |
2960 | intf, | |
2961 | &addr, | |
2962 | 0, | |
2963 | &msg, | |
2964 | NULL, | |
2965 | &smi_msg, | |
2966 | &recv_msg, | |
2967 | 0, | |
2968 | intf->my_address, | |
2969 | intf->my_lun, | |
2970 | 0, 1); /* Don't retry, and don't wait. */ | |
2971 | ||
2972 | if (intf->local_event_generator) { | |
2973 | /* Request the event receiver from the local MC. */ | |
2974 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
2975 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
2976 | msg.data = NULL; | |
2977 | msg.data_len = 0; | |
2978 | intf->null_user_handler = event_receiver_fetcher; | |
2979 | i_ipmi_request(NULL, | |
2980 | intf, | |
2981 | &addr, | |
2982 | 0, | |
2983 | &msg, | |
2984 | NULL, | |
2985 | &smi_msg, | |
2986 | &recv_msg, | |
2987 | 0, | |
2988 | intf->my_address, | |
2989 | intf->my_lun, | |
2990 | 0, 1); /* no retry, and no wait. */ | |
2991 | } | |
2992 | intf->null_user_handler = NULL; | |
2993 | ||
2994 | /* Validate the event receiver. The low bit must not | |
2995 | be 1 (it must be a valid IPMB address), it cannot | |
2996 | be zero, and it must not be my address. */ | |
2997 | if (((intf->event_receiver & 1) == 0) | |
2998 | && (intf->event_receiver != 0) | |
2999 | && (intf->event_receiver != intf->my_address)) | |
3000 | { | |
3001 | /* The event receiver is valid, send an IPMB | |
3002 | message. */ | |
3003 | ipmb = (struct ipmi_ipmb_addr *) &addr; | |
3004 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3005 | ipmb->channel = 0; /* FIXME - is this right? */ | |
3006 | ipmb->lun = intf->event_receiver_lun; | |
3007 | ipmb->slave_addr = intf->event_receiver; | |
3008 | } else if (intf->local_sel_device) { | |
3009 | /* The event receiver was not valid (or was | |
3010 | me), but I am an SEL device, just dump it | |
3011 | in my SEL. */ | |
3012 | si = (struct ipmi_system_interface_addr *) &addr; | |
3013 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3014 | si->channel = IPMI_BMC_CHANNEL; | |
3015 | si->lun = 0; | |
3016 | } else | |
3017 | continue; /* No where to send the event. */ | |
3018 | ||
3019 | ||
3020 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ | |
3021 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
3022 | msg.data = data; | |
3023 | msg.data_len = 16; | |
3024 | ||
3025 | j = 0; | |
3026 | while (*p) { | |
3027 | int size = strlen(p); | |
3028 | ||
3029 | if (size > 11) | |
3030 | size = 11; | |
3031 | data[0] = 0; | |
3032 | data[1] = 0; | |
3033 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
3034 | data[3] = intf->my_address; | |
3035 | data[4] = j++; /* sequence # */ | |
3036 | /* Always give 11 bytes, so strncpy will fill | |
3037 | it with zeroes for me. */ | |
3038 | strncpy(data+5, p, 11); | |
3039 | p += size; | |
3040 | ||
3041 | i_ipmi_request(NULL, | |
3042 | intf, | |
3043 | &addr, | |
3044 | 0, | |
3045 | &msg, | |
3046 | NULL, | |
3047 | &smi_msg, | |
3048 | &recv_msg, | |
3049 | 0, | |
3050 | intf->my_address, | |
3051 | intf->my_lun, | |
3052 | 0, 1); /* no retry, and no wait. */ | |
3053 | } | |
3054 | } | |
3055 | #endif /* CONFIG_IPMI_PANIC_STRING */ | |
3056 | } | |
3057 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
3058 | ||
3059 | static int has_paniced = 0; | |
3060 | ||
3061 | static int panic_event(struct notifier_block *this, | |
3062 | unsigned long event, | |
3063 | void *ptr) | |
3064 | { | |
3065 | int i; | |
3066 | ipmi_smi_t intf; | |
3067 | ||
3068 | if (has_paniced) | |
3069 | return NOTIFY_DONE; | |
3070 | has_paniced = 1; | |
3071 | ||
3072 | /* For every registered interface, set it to run to completion. */ | |
3073 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
3074 | intf = ipmi_interfaces[i]; | |
3075 | if (intf == NULL) | |
3076 | continue; | |
3077 | ||
3078 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
3079 | } | |
3080 | ||
3081 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
3082 | send_panic_events(ptr); | |
3083 | #endif | |
3084 | ||
3085 | return NOTIFY_DONE; | |
3086 | } | |
3087 | ||
3088 | static struct notifier_block panic_block = { | |
3089 | .notifier_call = panic_event, | |
3090 | .next = NULL, | |
3091 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
3092 | }; | |
3093 | ||
3094 | static int ipmi_init_msghandler(void) | |
3095 | { | |
3096 | int i; | |
3097 | ||
3098 | if (initialized) | |
3099 | return 0; | |
3100 | ||
3101 | printk(KERN_INFO "ipmi message handler version " | |
3102 | IPMI_MSGHANDLER_VERSION "\n"); | |
3103 | ||
3104 | for (i=0; i<MAX_IPMI_INTERFACES; i++) { | |
3105 | ipmi_interfaces[i] = NULL; | |
3106 | } | |
3107 | ||
3b625943 | 3108 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
3109 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
3110 | if (!proc_ipmi_root) { | |
3111 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
3112 | return -ENOMEM; | |
3113 | } | |
3114 | ||
3115 | proc_ipmi_root->owner = THIS_MODULE; | |
3b625943 | 3116 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
3117 | |
3118 | init_timer(&ipmi_timer); | |
3119 | ipmi_timer.data = 0; | |
3120 | ipmi_timer.function = ipmi_timeout; | |
3121 | ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES; | |
3122 | add_timer(&ipmi_timer); | |
3123 | ||
3124 | notifier_chain_register(&panic_notifier_list, &panic_block); | |
3125 | ||
3126 | initialized = 1; | |
3127 | ||
3128 | return 0; | |
3129 | } | |
3130 | ||
3131 | static __init int ipmi_init_msghandler_mod(void) | |
3132 | { | |
3133 | ipmi_init_msghandler(); | |
3134 | return 0; | |
3135 | } | |
3136 | ||
3137 | static __exit void cleanup_ipmi(void) | |
3138 | { | |
3139 | int count; | |
3140 | ||
3141 | if (!initialized) | |
3142 | return; | |
3143 | ||
3144 | notifier_chain_unregister(&panic_notifier_list, &panic_block); | |
3145 | ||
3146 | /* This can't be called if any interfaces exist, so no worry about | |
3147 | shutting down the interfaces. */ | |
3148 | ||
3149 | /* Tell the timer to stop, then wait for it to stop. This avoids | |
3150 | problems with race conditions removing the timer here. */ | |
8f43f84f CM |
3151 | atomic_inc(&stop_operation); |
3152 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 3153 | |
3b625943 | 3154 | #ifdef CONFIG_PROC_FS |
1da177e4 | 3155 | remove_proc_entry(proc_ipmi_root->name, &proc_root); |
3b625943 | 3156 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
3157 | |
3158 | initialized = 0; | |
3159 | ||
3160 | /* Check for buffer leaks. */ | |
3161 | count = atomic_read(&smi_msg_inuse_count); | |
3162 | if (count != 0) | |
3163 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
3164 | count); | |
3165 | count = atomic_read(&recv_msg_inuse_count); | |
3166 | if (count != 0) | |
3167 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
3168 | count); | |
3169 | } | |
3170 | module_exit(cleanup_ipmi); | |
3171 | ||
3172 | module_init(ipmi_init_msghandler_mod); | |
3173 | MODULE_LICENSE("GPL"); | |
3174 | ||
3175 | EXPORT_SYMBOL(ipmi_create_user); | |
3176 | EXPORT_SYMBOL(ipmi_destroy_user); | |
3177 | EXPORT_SYMBOL(ipmi_get_version); | |
3178 | EXPORT_SYMBOL(ipmi_request_settime); | |
3179 | EXPORT_SYMBOL(ipmi_request_supply_msgs); | |
3180 | EXPORT_SYMBOL(ipmi_register_smi); | |
3181 | EXPORT_SYMBOL(ipmi_unregister_smi); | |
3182 | EXPORT_SYMBOL(ipmi_register_for_cmd); | |
3183 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); | |
3184 | EXPORT_SYMBOL(ipmi_smi_msg_received); | |
3185 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); | |
3186 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); | |
3187 | EXPORT_SYMBOL(ipmi_addr_length); | |
3188 | EXPORT_SYMBOL(ipmi_validate_addr); | |
3189 | EXPORT_SYMBOL(ipmi_set_gets_events); | |
3190 | EXPORT_SYMBOL(ipmi_smi_watcher_register); | |
3191 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); | |
3192 | EXPORT_SYMBOL(ipmi_set_my_address); | |
3193 | EXPORT_SYMBOL(ipmi_get_my_address); | |
3194 | EXPORT_SYMBOL(ipmi_set_my_LUN); | |
3195 | EXPORT_SYMBOL(ipmi_get_my_LUN); | |
3196 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); | |
3b625943 | 3197 | EXPORT_SYMBOL(proc_ipmi_root); |
1da177e4 | 3198 | EXPORT_SYMBOL(ipmi_user_set_run_to_completion); |