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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 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/errno.h> | |
36 | #include <asm/system.h> | |
37 | #include <linux/sched.h> | |
38 | #include <linux/poll.h> | |
39 | #include <linux/spinlock.h> | |
d6dfd131 | 40 | #include <linux/mutex.h> |
1da177e4 LT |
41 | #include <linux/slab.h> |
42 | #include <linux/ipmi.h> | |
43 | #include <linux/ipmi_smi.h> | |
44 | #include <linux/notifier.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/proc_fs.h> | |
393d2cc3 | 47 | #include <linux/rcupdate.h> |
1da177e4 LT |
48 | |
49 | #define PFX "IPMI message handler: " | |
1fdd75bd | 50 | |
a23f9a3c | 51 | #define IPMI_DRIVER_VERSION "39.0" |
1da177e4 LT |
52 | |
53 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
54 | static int ipmi_init_msghandler(void); | |
55 | ||
56 | static int initialized = 0; | |
57 | ||
3b625943 | 58 | #ifdef CONFIG_PROC_FS |
456229a9 | 59 | static struct proc_dir_entry *proc_ipmi_root = NULL; |
3b625943 | 60 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
61 | |
62 | #define MAX_EVENTS_IN_QUEUE 25 | |
63 | ||
64 | /* Don't let a message sit in a queue forever, always time it with at lest | |
65 | the max message timer. This is in milliseconds. */ | |
66 | #define MAX_MSG_TIMEOUT 60000 | |
67 | ||
393d2cc3 CM |
68 | |
69 | /* | |
70 | * The main "user" data structure. | |
71 | */ | |
1da177e4 LT |
72 | struct ipmi_user |
73 | { | |
74 | struct list_head link; | |
75 | ||
393d2cc3 CM |
76 | /* Set to "0" when the user is destroyed. */ |
77 | int valid; | |
78 | ||
79 | struct kref refcount; | |
80 | ||
1da177e4 LT |
81 | /* The upper layer that handles receive messages. */ |
82 | struct ipmi_user_hndl *handler; | |
83 | void *handler_data; | |
84 | ||
85 | /* The interface this user is bound to. */ | |
86 | ipmi_smi_t intf; | |
87 | ||
88 | /* Does this interface receive IPMI events? */ | |
89 | int gets_events; | |
90 | }; | |
91 | ||
92 | struct cmd_rcvr | |
93 | { | |
94 | struct list_head link; | |
95 | ||
96 | ipmi_user_t user; | |
97 | unsigned char netfn; | |
98 | unsigned char cmd; | |
c69c3127 | 99 | unsigned int chans; |
393d2cc3 CM |
100 | |
101 | /* | |
102 | * This is used to form a linked lised during mass deletion. | |
103 | * Since this is in an RCU list, we cannot use the link above | |
104 | * or change any data until the RCU period completes. So we | |
105 | * use this next variable during mass deletion so we can have | |
106 | * a list and don't have to wait and restart the search on | |
107 | * every individual deletion of a command. */ | |
108 | struct cmd_rcvr *next; | |
1da177e4 LT |
109 | }; |
110 | ||
111 | struct seq_table | |
112 | { | |
113 | unsigned int inuse : 1; | |
114 | unsigned int broadcast : 1; | |
115 | ||
116 | unsigned long timeout; | |
117 | unsigned long orig_timeout; | |
118 | unsigned int retries_left; | |
119 | ||
120 | /* To verify on an incoming send message response that this is | |
121 | the message that the response is for, we keep a sequence id | |
122 | and increment it every time we send a message. */ | |
123 | long seqid; | |
124 | ||
125 | /* This is held so we can properly respond to the message on a | |
126 | timeout, and it is used to hold the temporary data for | |
127 | retransmission, too. */ | |
128 | struct ipmi_recv_msg *recv_msg; | |
129 | }; | |
130 | ||
131 | /* Store the information in a msgid (long) to allow us to find a | |
132 | sequence table entry from the msgid. */ | |
133 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) | |
134 | ||
135 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
136 | do { \ | |
137 | seq = ((msgid >> 26) & 0x3f); \ | |
138 | seqid = (msgid & 0x3fffff); \ | |
e8b33617 | 139 | } while (0) |
1da177e4 LT |
140 | |
141 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) | |
142 | ||
143 | struct ipmi_channel | |
144 | { | |
145 | unsigned char medium; | |
146 | unsigned char protocol; | |
c14979b9 CM |
147 | |
148 | /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
149 | but may be changed by the user. */ | |
150 | unsigned char address; | |
151 | ||
152 | /* My LUN. This should generally stay the SMS LUN, but just in | |
153 | case... */ | |
154 | unsigned char lun; | |
1da177e4 LT |
155 | }; |
156 | ||
3b625943 | 157 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
158 | struct ipmi_proc_entry |
159 | { | |
160 | char *name; | |
161 | struct ipmi_proc_entry *next; | |
162 | }; | |
3b625943 | 163 | #endif |
1da177e4 | 164 | |
50c812b2 CM |
165 | struct bmc_device |
166 | { | |
167 | struct platform_device *dev; | |
168 | struct ipmi_device_id id; | |
169 | unsigned char guid[16]; | |
170 | int guid_set; | |
171 | ||
172 | struct kref refcount; | |
173 | ||
174 | /* bmc device attributes */ | |
175 | struct device_attribute device_id_attr; | |
176 | struct device_attribute provides_dev_sdrs_attr; | |
177 | struct device_attribute revision_attr; | |
178 | struct device_attribute firmware_rev_attr; | |
179 | struct device_attribute version_attr; | |
180 | struct device_attribute add_dev_support_attr; | |
181 | struct device_attribute manufacturer_id_attr; | |
182 | struct device_attribute product_id_attr; | |
183 | struct device_attribute guid_attr; | |
184 | struct device_attribute aux_firmware_rev_attr; | |
185 | }; | |
186 | ||
1da177e4 | 187 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 188 | #define IPMI_MAX_CHANNELS 16 |
1da177e4 LT |
189 | struct ipmi_smi |
190 | { | |
191 | /* What interface number are we? */ | |
192 | int intf_num; | |
193 | ||
393d2cc3 CM |
194 | struct kref refcount; |
195 | ||
196 | /* The list of upper layers that are using me. seq_lock | |
197 | * protects this. */ | |
198 | struct list_head users; | |
1da177e4 LT |
199 | |
200 | /* Used for wake ups at startup. */ | |
201 | wait_queue_head_t waitq; | |
202 | ||
50c812b2 CM |
203 | struct bmc_device *bmc; |
204 | char *my_dev_name; | |
1da177e4 LT |
205 | |
206 | /* This is the lower-layer's sender routine. */ | |
207 | struct ipmi_smi_handlers *handlers; | |
208 | void *send_info; | |
209 | ||
3b625943 | 210 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
211 | /* A list of proc entries for this interface. This does not |
212 | need a lock, only one thread creates it and only one thread | |
213 | destroys it. */ | |
3b625943 | 214 | spinlock_t proc_entry_lock; |
1da177e4 | 215 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 216 | #endif |
1da177e4 | 217 | |
50c812b2 CM |
218 | /* Driver-model device for the system interface. */ |
219 | struct device *si_dev; | |
220 | ||
1da177e4 LT |
221 | /* A table of sequence numbers for this interface. We use the |
222 | sequence numbers for IPMB messages that go out of the | |
223 | interface to match them up with their responses. A routine | |
224 | is called periodically to time the items in this list. */ | |
225 | spinlock_t seq_lock; | |
226 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
227 | int curr_seq; | |
228 | ||
229 | /* Messages that were delayed for some reason (out of memory, | |
230 | for instance), will go in here to be processed later in a | |
231 | periodic timer interrupt. */ | |
232 | spinlock_t waiting_msgs_lock; | |
233 | struct list_head waiting_msgs; | |
234 | ||
235 | /* The list of command receivers that are registered for commands | |
236 | on this interface. */ | |
d6dfd131 | 237 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
238 | struct list_head cmd_rcvrs; |
239 | ||
240 | /* Events that were queues because no one was there to receive | |
241 | them. */ | |
242 | spinlock_t events_lock; /* For dealing with event stuff. */ | |
243 | struct list_head waiting_events; | |
244 | unsigned int waiting_events_count; /* How many events in queue? */ | |
245 | ||
1da177e4 LT |
246 | /* The event receiver for my BMC, only really used at panic |
247 | shutdown as a place to store this. */ | |
248 | unsigned char event_receiver; | |
249 | unsigned char event_receiver_lun; | |
250 | unsigned char local_sel_device; | |
251 | unsigned char local_event_generator; | |
252 | ||
253 | /* A cheap hack, if this is non-null and a message to an | |
254 | interface comes in with a NULL user, call this routine with | |
255 | it. Note that the message will still be freed by the | |
256 | caller. This only works on the system interface. */ | |
56a55ec6 | 257 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 LT |
258 | |
259 | /* When we are scanning the channels for an SMI, this will | |
260 | tell which channel we are scanning. */ | |
261 | int curr_channel; | |
262 | ||
263 | /* Channel information */ | |
264 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
265 | ||
266 | /* Proc FS stuff. */ | |
267 | struct proc_dir_entry *proc_dir; | |
268 | char proc_dir_name[10]; | |
269 | ||
270 | spinlock_t counter_lock; /* For making counters atomic. */ | |
271 | ||
272 | /* Commands we got that were invalid. */ | |
273 | unsigned int sent_invalid_commands; | |
274 | ||
275 | /* Commands we sent to the MC. */ | |
276 | unsigned int sent_local_commands; | |
277 | /* Responses from the MC that were delivered to a user. */ | |
278 | unsigned int handled_local_responses; | |
279 | /* Responses from the MC that were not delivered to a user. */ | |
280 | unsigned int unhandled_local_responses; | |
281 | ||
282 | /* Commands we sent out to the IPMB bus. */ | |
283 | unsigned int sent_ipmb_commands; | |
284 | /* Commands sent on the IPMB that had errors on the SEND CMD */ | |
285 | unsigned int sent_ipmb_command_errs; | |
286 | /* Each retransmit increments this count. */ | |
287 | unsigned int retransmitted_ipmb_commands; | |
288 | /* When a message times out (runs out of retransmits) this is | |
289 | incremented. */ | |
290 | unsigned int timed_out_ipmb_commands; | |
291 | ||
292 | /* This is like above, but for broadcasts. Broadcasts are | |
293 | *not* included in the above count (they are expected to | |
294 | time out). */ | |
295 | unsigned int timed_out_ipmb_broadcasts; | |
296 | ||
297 | /* Responses I have sent to the IPMB bus. */ | |
298 | unsigned int sent_ipmb_responses; | |
299 | ||
300 | /* The response was delivered to the user. */ | |
301 | unsigned int handled_ipmb_responses; | |
302 | /* The response had invalid data in it. */ | |
303 | unsigned int invalid_ipmb_responses; | |
304 | /* The response didn't have anyone waiting for it. */ | |
305 | unsigned int unhandled_ipmb_responses; | |
306 | ||
307 | /* Commands we sent out to the IPMB bus. */ | |
308 | unsigned int sent_lan_commands; | |
309 | /* Commands sent on the IPMB that had errors on the SEND CMD */ | |
310 | unsigned int sent_lan_command_errs; | |
311 | /* Each retransmit increments this count. */ | |
312 | unsigned int retransmitted_lan_commands; | |
313 | /* When a message times out (runs out of retransmits) this is | |
314 | incremented. */ | |
315 | unsigned int timed_out_lan_commands; | |
316 | ||
317 | /* Responses I have sent to the IPMB bus. */ | |
318 | unsigned int sent_lan_responses; | |
319 | ||
320 | /* The response was delivered to the user. */ | |
321 | unsigned int handled_lan_responses; | |
322 | /* The response had invalid data in it. */ | |
323 | unsigned int invalid_lan_responses; | |
324 | /* The response didn't have anyone waiting for it. */ | |
325 | unsigned int unhandled_lan_responses; | |
326 | ||
327 | /* The command was delivered to the user. */ | |
328 | unsigned int handled_commands; | |
329 | /* The command had invalid data in it. */ | |
330 | unsigned int invalid_commands; | |
331 | /* The command didn't have anyone waiting for it. */ | |
332 | unsigned int unhandled_commands; | |
333 | ||
334 | /* Invalid data in an event. */ | |
335 | unsigned int invalid_events; | |
336 | /* Events that were received with the proper format. */ | |
337 | unsigned int events; | |
338 | }; | |
50c812b2 | 339 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 340 | |
393d2cc3 CM |
341 | /* Used to mark an interface entry that cannot be used but is not a |
342 | * free entry, either, primarily used at creation and deletion time so | |
343 | * a slot doesn't get reused too quickly. */ | |
344 | #define IPMI_INVALID_INTERFACE_ENTRY ((ipmi_smi_t) ((long) 1)) | |
345 | #define IPMI_INVALID_INTERFACE(i) (((i) == NULL) \ | |
346 | || (i == IPMI_INVALID_INTERFACE_ENTRY)) | |
347 | ||
50c812b2 CM |
348 | /** |
349 | * The driver model view of the IPMI messaging driver. | |
350 | */ | |
351 | static struct device_driver ipmidriver = { | |
352 | .name = "ipmi", | |
353 | .bus = &platform_bus_type | |
354 | }; | |
355 | static DEFINE_MUTEX(ipmidriver_mutex); | |
356 | ||
1da177e4 LT |
357 | #define MAX_IPMI_INTERFACES 4 |
358 | static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES]; | |
359 | ||
393d2cc3 | 360 | /* Directly protects the ipmi_interfaces data structure. */ |
1da177e4 LT |
361 | static DEFINE_SPINLOCK(interfaces_lock); |
362 | ||
363 | /* List of watchers that want to know when smi's are added and | |
364 | deleted. */ | |
365 | static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers); | |
366 | static DECLARE_RWSEM(smi_watchers_sem); | |
367 | ||
393d2cc3 CM |
368 | |
369 | static void free_recv_msg_list(struct list_head *q) | |
370 | { | |
371 | struct ipmi_recv_msg *msg, *msg2; | |
372 | ||
373 | list_for_each_entry_safe(msg, msg2, q, link) { | |
374 | list_del(&msg->link); | |
375 | ipmi_free_recv_msg(msg); | |
376 | } | |
377 | } | |
378 | ||
379 | static void clean_up_interface_data(ipmi_smi_t intf) | |
380 | { | |
381 | int i; | |
382 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
383 | struct list_head list; |
384 | ||
385 | free_recv_msg_list(&intf->waiting_msgs); | |
386 | free_recv_msg_list(&intf->waiting_events); | |
387 | ||
388 | /* Wholesale remove all the entries from the list in the | |
389 | * interface and wait for RCU to know that none are in use. */ | |
d6dfd131 | 390 | mutex_lock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
391 | list_add_rcu(&list, &intf->cmd_rcvrs); |
392 | list_del_rcu(&intf->cmd_rcvrs); | |
d6dfd131 | 393 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
394 | synchronize_rcu(); |
395 | ||
396 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
397 | kfree(rcvr); | |
398 | ||
399 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
400 | if ((intf->seq_table[i].inuse) | |
401 | && (intf->seq_table[i].recv_msg)) | |
402 | { | |
403 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | static void intf_free(struct kref *ref) | |
409 | { | |
410 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
411 | ||
412 | clean_up_interface_data(intf); | |
413 | kfree(intf); | |
414 | } | |
415 | ||
1da177e4 LT |
416 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
417 | { | |
393d2cc3 CM |
418 | int i; |
419 | unsigned long flags; | |
1da177e4 | 420 | |
1da177e4 LT |
421 | down_write(&smi_watchers_sem); |
422 | list_add(&(watcher->link), &smi_watchers); | |
393d2cc3 CM |
423 | up_write(&smi_watchers_sem); |
424 | spin_lock_irqsave(&interfaces_lock, flags); | |
e8b33617 | 425 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
393d2cc3 CM |
426 | ipmi_smi_t intf = ipmi_interfaces[i]; |
427 | if (IPMI_INVALID_INTERFACE(intf)) | |
428 | continue; | |
429 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
50c812b2 | 430 | watcher->new_smi(i, intf->si_dev); |
393d2cc3 | 431 | spin_lock_irqsave(&interfaces_lock, flags); |
1da177e4 | 432 | } |
393d2cc3 | 433 | spin_unlock_irqrestore(&interfaces_lock, flags); |
1da177e4 LT |
434 | return 0; |
435 | } | |
436 | ||
437 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
438 | { | |
439 | down_write(&smi_watchers_sem); | |
440 | list_del(&(watcher->link)); | |
441 | up_write(&smi_watchers_sem); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | static void | |
50c812b2 | 446 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
447 | { |
448 | struct ipmi_smi_watcher *w; | |
449 | ||
450 | down_read(&smi_watchers_sem); | |
451 | list_for_each_entry(w, &smi_watchers, link) { | |
452 | if (try_module_get(w->owner)) { | |
50c812b2 | 453 | w->new_smi(i, dev); |
1da177e4 LT |
454 | module_put(w->owner); |
455 | } | |
456 | } | |
457 | up_read(&smi_watchers_sem); | |
458 | } | |
459 | ||
460 | static int | |
461 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
462 | { | |
463 | if (addr1->addr_type != addr2->addr_type) | |
464 | return 0; | |
465 | ||
466 | if (addr1->channel != addr2->channel) | |
467 | return 0; | |
468 | ||
469 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
470 | struct ipmi_system_interface_addr *smi_addr1 | |
471 | = (struct ipmi_system_interface_addr *) addr1; | |
472 | struct ipmi_system_interface_addr *smi_addr2 | |
473 | = (struct ipmi_system_interface_addr *) addr2; | |
474 | return (smi_addr1->lun == smi_addr2->lun); | |
475 | } | |
476 | ||
477 | if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) | |
478 | || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
479 | { | |
480 | struct ipmi_ipmb_addr *ipmb_addr1 | |
481 | = (struct ipmi_ipmb_addr *) addr1; | |
482 | struct ipmi_ipmb_addr *ipmb_addr2 | |
483 | = (struct ipmi_ipmb_addr *) addr2; | |
484 | ||
485 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
486 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
487 | } | |
488 | ||
489 | if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { | |
490 | struct ipmi_lan_addr *lan_addr1 | |
491 | = (struct ipmi_lan_addr *) addr1; | |
492 | struct ipmi_lan_addr *lan_addr2 | |
493 | = (struct ipmi_lan_addr *) addr2; | |
494 | ||
495 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
496 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
497 | && (lan_addr1->session_handle | |
498 | == lan_addr2->session_handle) | |
499 | && (lan_addr1->lun == lan_addr2->lun)); | |
500 | } | |
501 | ||
502 | return 1; | |
503 | } | |
504 | ||
505 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
506 | { | |
507 | if (len < sizeof(struct ipmi_system_interface_addr)) { | |
508 | return -EINVAL; | |
509 | } | |
510 | ||
511 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
512 | if (addr->channel != IPMI_BMC_CHANNEL) | |
513 | return -EINVAL; | |
514 | return 0; | |
515 | } | |
516 | ||
517 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 518 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
519 | || (addr->channel < 0)) |
520 | return -EINVAL; | |
521 | ||
522 | if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
523 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
524 | { | |
525 | if (len < sizeof(struct ipmi_ipmb_addr)) { | |
526 | return -EINVAL; | |
527 | } | |
528 | return 0; | |
529 | } | |
530 | ||
531 | if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
532 | if (len < sizeof(struct ipmi_lan_addr)) { | |
533 | return -EINVAL; | |
534 | } | |
535 | return 0; | |
536 | } | |
537 | ||
538 | return -EINVAL; | |
539 | } | |
540 | ||
541 | unsigned int ipmi_addr_length(int addr_type) | |
542 | { | |
543 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
544 | return sizeof(struct ipmi_system_interface_addr); | |
545 | ||
546 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
547 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
548 | { | |
549 | return sizeof(struct ipmi_ipmb_addr); | |
550 | } | |
551 | ||
552 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
553 | return sizeof(struct ipmi_lan_addr); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static void deliver_response(struct ipmi_recv_msg *msg) | |
559 | { | |
8a3628d5 | 560 | if (!msg->user) { |
56a55ec6 CM |
561 | ipmi_smi_t intf = msg->user_msg_data; |
562 | unsigned long flags; | |
563 | ||
564 | /* Special handling for NULL users. */ | |
565 | if (intf->null_user_handler) { | |
566 | intf->null_user_handler(intf, msg); | |
567 | spin_lock_irqsave(&intf->counter_lock, flags); | |
568 | intf->handled_local_responses++; | |
569 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
570 | } else { | |
571 | /* No handler, so give up. */ | |
572 | spin_lock_irqsave(&intf->counter_lock, flags); | |
573 | intf->unhandled_local_responses++; | |
574 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
575 | } | |
576 | ipmi_free_recv_msg(msg); | |
577 | } else { | |
393d2cc3 CM |
578 | ipmi_user_t user = msg->user; |
579 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 580 | } |
1da177e4 LT |
581 | } |
582 | ||
583 | /* Find the next sequence number not being used and add the given | |
584 | message with the given timeout to the sequence table. This must be | |
585 | called with the interface's seq_lock held. */ | |
586 | static int intf_next_seq(ipmi_smi_t intf, | |
587 | struct ipmi_recv_msg *recv_msg, | |
588 | unsigned long timeout, | |
589 | int retries, | |
590 | int broadcast, | |
591 | unsigned char *seq, | |
592 | long *seqid) | |
593 | { | |
594 | int rv = 0; | |
595 | unsigned int i; | |
596 | ||
e8b33617 | 597 | for (i = intf->curr_seq; |
1da177e4 | 598 | (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
e8b33617 | 599 | i = (i+1)%IPMI_IPMB_NUM_SEQ) |
1da177e4 | 600 | { |
8a3628d5 | 601 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
602 | break; |
603 | } | |
604 | ||
8a3628d5 | 605 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
606 | intf->seq_table[i].recv_msg = recv_msg; |
607 | ||
608 | /* Start with the maximum timeout, when the send response | |
609 | comes in we will start the real timer. */ | |
610 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; | |
611 | intf->seq_table[i].orig_timeout = timeout; | |
612 | intf->seq_table[i].retries_left = retries; | |
613 | intf->seq_table[i].broadcast = broadcast; | |
614 | intf->seq_table[i].inuse = 1; | |
615 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
616 | *seq = i; | |
617 | *seqid = intf->seq_table[i].seqid; | |
618 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
619 | } else { | |
620 | rv = -EAGAIN; | |
621 | } | |
622 | ||
623 | return rv; | |
624 | } | |
625 | ||
626 | /* Return the receive message for the given sequence number and | |
627 | release the sequence number so it can be reused. Some other data | |
628 | is passed in to be sure the message matches up correctly (to help | |
629 | guard against message coming in after their timeout and the | |
630 | sequence number being reused). */ | |
631 | static int intf_find_seq(ipmi_smi_t intf, | |
632 | unsigned char seq, | |
633 | short channel, | |
634 | unsigned char cmd, | |
635 | unsigned char netfn, | |
636 | struct ipmi_addr *addr, | |
637 | struct ipmi_recv_msg **recv_msg) | |
638 | { | |
639 | int rv = -ENODEV; | |
640 | unsigned long flags; | |
641 | ||
642 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
643 | return -EINVAL; | |
644 | ||
645 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
646 | if (intf->seq_table[seq].inuse) { | |
647 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
648 | ||
649 | if ((msg->addr.channel == channel) | |
650 | && (msg->msg.cmd == cmd) | |
651 | && (msg->msg.netfn == netfn) | |
652 | && (ipmi_addr_equal(addr, &(msg->addr)))) | |
653 | { | |
654 | *recv_msg = msg; | |
655 | intf->seq_table[seq].inuse = 0; | |
656 | rv = 0; | |
657 | } | |
658 | } | |
659 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
660 | ||
661 | return rv; | |
662 | } | |
663 | ||
664 | ||
665 | /* Start the timer for a specific sequence table entry. */ | |
666 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
667 | long msgid) | |
668 | { | |
669 | int rv = -ENODEV; | |
670 | unsigned long flags; | |
671 | unsigned char seq; | |
672 | unsigned long seqid; | |
673 | ||
674 | ||
675 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
676 | ||
677 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
678 | /* We do this verification because the user can be deleted | |
679 | while a message is outstanding. */ | |
680 | if ((intf->seq_table[seq].inuse) | |
681 | && (intf->seq_table[seq].seqid == seqid)) | |
682 | { | |
683 | struct seq_table *ent = &(intf->seq_table[seq]); | |
684 | ent->timeout = ent->orig_timeout; | |
685 | rv = 0; | |
686 | } | |
687 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
688 | ||
689 | return rv; | |
690 | } | |
691 | ||
692 | /* Got an error for the send message for a specific sequence number. */ | |
693 | static int intf_err_seq(ipmi_smi_t intf, | |
694 | long msgid, | |
695 | unsigned int err) | |
696 | { | |
697 | int rv = -ENODEV; | |
698 | unsigned long flags; | |
699 | unsigned char seq; | |
700 | unsigned long seqid; | |
701 | struct ipmi_recv_msg *msg = NULL; | |
702 | ||
703 | ||
704 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
705 | ||
706 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
707 | /* We do this verification because the user can be deleted | |
708 | while a message is outstanding. */ | |
709 | if ((intf->seq_table[seq].inuse) | |
710 | && (intf->seq_table[seq].seqid == seqid)) | |
711 | { | |
712 | struct seq_table *ent = &(intf->seq_table[seq]); | |
713 | ||
714 | ent->inuse = 0; | |
715 | msg = ent->recv_msg; | |
716 | rv = 0; | |
717 | } | |
718 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
719 | ||
720 | if (msg) { | |
721 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
722 | msg->msg_data[0] = err; | |
723 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
724 | msg->msg.data_len = 1; | |
725 | msg->msg.data = msg->msg_data; | |
726 | deliver_response(msg); | |
727 | } | |
728 | ||
729 | return rv; | |
730 | } | |
731 | ||
732 | ||
733 | int ipmi_create_user(unsigned int if_num, | |
734 | struct ipmi_user_hndl *handler, | |
735 | void *handler_data, | |
736 | ipmi_user_t *user) | |
737 | { | |
738 | unsigned long flags; | |
739 | ipmi_user_t new_user; | |
740 | int rv = 0; | |
741 | ipmi_smi_t intf; | |
742 | ||
743 | /* There is no module usecount here, because it's not | |
744 | required. Since this can only be used by and called from | |
745 | other modules, they will implicitly use this module, and | |
746 | thus this can't be removed unless the other modules are | |
747 | removed. */ | |
748 | ||
749 | if (handler == NULL) | |
750 | return -EINVAL; | |
751 | ||
752 | /* Make sure the driver is actually initialized, this handles | |
753 | problems with initialization order. */ | |
754 | if (!initialized) { | |
755 | rv = ipmi_init_msghandler(); | |
756 | if (rv) | |
757 | return rv; | |
758 | ||
759 | /* The init code doesn't return an error if it was turned | |
760 | off, but it won't initialize. Check that. */ | |
761 | if (!initialized) | |
762 | return -ENODEV; | |
763 | } | |
764 | ||
765 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 766 | if (!new_user) |
1da177e4 LT |
767 | return -ENOMEM; |
768 | ||
393d2cc3 CM |
769 | spin_lock_irqsave(&interfaces_lock, flags); |
770 | intf = ipmi_interfaces[if_num]; | |
771 | if ((if_num >= MAX_IPMI_INTERFACES) || IPMI_INVALID_INTERFACE(intf)) { | |
772 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
5c98d29a AB |
773 | rv = -EINVAL; |
774 | goto out_kfree; | |
1da177e4 LT |
775 | } |
776 | ||
393d2cc3 CM |
777 | /* Note that each existing user holds a refcount to the interface. */ |
778 | kref_get(&intf->refcount); | |
779 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
1da177e4 | 780 | |
393d2cc3 | 781 | kref_init(&new_user->refcount); |
1da177e4 LT |
782 | new_user->handler = handler; |
783 | new_user->handler_data = handler_data; | |
784 | new_user->intf = intf; | |
785 | new_user->gets_events = 0; | |
786 | ||
787 | if (!try_module_get(intf->handlers->owner)) { | |
788 | rv = -ENODEV; | |
5c98d29a | 789 | goto out_kref; |
1da177e4 LT |
790 | } |
791 | ||
792 | if (intf->handlers->inc_usecount) { | |
793 | rv = intf->handlers->inc_usecount(intf->send_info); | |
794 | if (rv) { | |
795 | module_put(intf->handlers->owner); | |
5c98d29a | 796 | goto out_kref; |
1da177e4 LT |
797 | } |
798 | } | |
799 | ||
393d2cc3 CM |
800 | new_user->valid = 1; |
801 | spin_lock_irqsave(&intf->seq_lock, flags); | |
802 | list_add_rcu(&new_user->link, &intf->users); | |
803 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
804 | *user = new_user; | |
805 | return 0; | |
1da177e4 | 806 | |
5c98d29a | 807 | out_kref: |
393d2cc3 | 808 | kref_put(&intf->refcount, intf_free); |
5c98d29a AB |
809 | out_kfree: |
810 | kfree(new_user); | |
1da177e4 LT |
811 | return rv; |
812 | } | |
813 | ||
393d2cc3 CM |
814 | static void free_user(struct kref *ref) |
815 | { | |
816 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
817 | kfree(user); | |
818 | } | |
819 | ||
820 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 821 | { |
393d2cc3 | 822 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
823 | int i; |
824 | unsigned long flags; | |
393d2cc3 | 825 | struct cmd_rcvr *rcvr; |
393d2cc3 | 826 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 827 | |
8a3628d5 | 828 | user->valid = 0; |
1da177e4 | 829 | |
393d2cc3 CM |
830 | /* Remove the user from the interface's sequence table. */ |
831 | spin_lock_irqsave(&intf->seq_lock, flags); | |
832 | list_del_rcu(&user->link); | |
1da177e4 | 833 | |
e8b33617 | 834 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 CM |
835 | if (intf->seq_table[i].inuse |
836 | && (intf->seq_table[i].recv_msg->user == user)) | |
1da177e4 | 837 | { |
393d2cc3 | 838 | intf->seq_table[i].inuse = 0; |
1da177e4 LT |
839 | } |
840 | } | |
393d2cc3 CM |
841 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
842 | ||
843 | /* | |
844 | * Remove the user from the command receiver's table. First | |
845 | * we build a list of everything (not using the standard link, | |
846 | * since other things may be using it till we do | |
847 | * synchronize_rcu()) then free everything in that list. | |
848 | */ | |
d6dfd131 | 849 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 850 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 851 | if (rcvr->user == user) { |
393d2cc3 CM |
852 | list_del_rcu(&rcvr->link); |
853 | rcvr->next = rcvrs; | |
854 | rcvrs = rcvr; | |
1da177e4 LT |
855 | } |
856 | } | |
d6dfd131 | 857 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
858 | synchronize_rcu(); |
859 | while (rcvrs) { | |
860 | rcvr = rcvrs; | |
861 | rcvrs = rcvr->next; | |
862 | kfree(rcvr); | |
863 | } | |
1da177e4 | 864 | |
393d2cc3 CM |
865 | module_put(intf->handlers->owner); |
866 | if (intf->handlers->dec_usecount) | |
867 | intf->handlers->dec_usecount(intf->send_info); | |
1da177e4 | 868 | |
393d2cc3 | 869 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 870 | |
393d2cc3 | 871 | kref_put(&user->refcount, free_user); |
1da177e4 | 872 | |
8a3628d5 | 873 | return 0; |
1da177e4 LT |
874 | } |
875 | ||
876 | void ipmi_get_version(ipmi_user_t user, | |
877 | unsigned char *major, | |
878 | unsigned char *minor) | |
879 | { | |
50c812b2 CM |
880 | *major = ipmi_version_major(&user->intf->bmc->id); |
881 | *minor = ipmi_version_minor(&user->intf->bmc->id); | |
1da177e4 LT |
882 | } |
883 | ||
c14979b9 CM |
884 | int ipmi_set_my_address(ipmi_user_t user, |
885 | unsigned int channel, | |
886 | unsigned char address) | |
1da177e4 | 887 | { |
c14979b9 CM |
888 | if (channel >= IPMI_MAX_CHANNELS) |
889 | return -EINVAL; | |
890 | user->intf->channels[channel].address = address; | |
891 | return 0; | |
1da177e4 LT |
892 | } |
893 | ||
c14979b9 CM |
894 | int ipmi_get_my_address(ipmi_user_t user, |
895 | unsigned int channel, | |
896 | unsigned char *address) | |
1da177e4 | 897 | { |
c14979b9 CM |
898 | if (channel >= IPMI_MAX_CHANNELS) |
899 | return -EINVAL; | |
900 | *address = user->intf->channels[channel].address; | |
901 | return 0; | |
1da177e4 LT |
902 | } |
903 | ||
c14979b9 CM |
904 | int ipmi_set_my_LUN(ipmi_user_t user, |
905 | unsigned int channel, | |
906 | unsigned char LUN) | |
1da177e4 | 907 | { |
c14979b9 CM |
908 | if (channel >= IPMI_MAX_CHANNELS) |
909 | return -EINVAL; | |
910 | user->intf->channels[channel].lun = LUN & 0x3; | |
911 | return 0; | |
1da177e4 LT |
912 | } |
913 | ||
c14979b9 CM |
914 | int ipmi_get_my_LUN(ipmi_user_t user, |
915 | unsigned int channel, | |
916 | unsigned char *address) | |
1da177e4 | 917 | { |
c14979b9 CM |
918 | if (channel >= IPMI_MAX_CHANNELS) |
919 | return -EINVAL; | |
920 | *address = user->intf->channels[channel].lun; | |
921 | return 0; | |
1da177e4 LT |
922 | } |
923 | ||
924 | int ipmi_set_gets_events(ipmi_user_t user, int val) | |
925 | { | |
393d2cc3 CM |
926 | unsigned long flags; |
927 | ipmi_smi_t intf = user->intf; | |
928 | struct ipmi_recv_msg *msg, *msg2; | |
929 | struct list_head msgs; | |
1da177e4 | 930 | |
393d2cc3 CM |
931 | INIT_LIST_HEAD(&msgs); |
932 | ||
933 | spin_lock_irqsave(&intf->events_lock, flags); | |
1da177e4 LT |
934 | user->gets_events = val; |
935 | ||
936 | if (val) { | |
937 | /* Deliver any queued events. */ | |
179e0917 AM |
938 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
939 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 940 | intf->waiting_events_count = 0; |
1da177e4 | 941 | } |
393d2cc3 CM |
942 | |
943 | /* Hold the events lock while doing this to preserve order. */ | |
944 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
945 | msg->user = user; | |
946 | kref_get(&user->refcount); | |
947 | deliver_response(msg); | |
948 | } | |
949 | ||
950 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1da177e4 LT |
951 | |
952 | return 0; | |
953 | } | |
954 | ||
393d2cc3 CM |
955 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
956 | unsigned char netfn, | |
c69c3127 CM |
957 | unsigned char cmd, |
958 | unsigned char chan) | |
393d2cc3 CM |
959 | { |
960 | struct cmd_rcvr *rcvr; | |
961 | ||
962 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
963 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
964 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
965 | return rcvr; |
966 | } | |
967 | return NULL; | |
968 | } | |
969 | ||
c69c3127 CM |
970 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
971 | unsigned char netfn, | |
972 | unsigned char cmd, | |
973 | unsigned int chans) | |
974 | { | |
975 | struct cmd_rcvr *rcvr; | |
976 | ||
977 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
978 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
979 | && (rcvr->chans & chans)) | |
980 | return 0; | |
981 | } | |
982 | return 1; | |
983 | } | |
984 | ||
1da177e4 LT |
985 | int ipmi_register_for_cmd(ipmi_user_t user, |
986 | unsigned char netfn, | |
c69c3127 CM |
987 | unsigned char cmd, |
988 | unsigned int chans) | |
1da177e4 | 989 | { |
393d2cc3 CM |
990 | ipmi_smi_t intf = user->intf; |
991 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 992 | int rv = 0; |
1da177e4 LT |
993 | |
994 | ||
995 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 996 | if (!rcvr) |
1da177e4 | 997 | return -ENOMEM; |
393d2cc3 CM |
998 | rcvr->cmd = cmd; |
999 | rcvr->netfn = netfn; | |
c69c3127 | 1000 | rcvr->chans = chans; |
393d2cc3 | 1001 | rcvr->user = user; |
1da177e4 | 1002 | |
d6dfd131 | 1003 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1004 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1005 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1006 | rv = -EBUSY; |
1007 | goto out_unlock; | |
1da177e4 | 1008 | } |
877197ef | 1009 | |
393d2cc3 | 1010 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1011 | |
393d2cc3 | 1012 | out_unlock: |
d6dfd131 | 1013 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1014 | if (rv) |
1015 | kfree(rcvr); | |
1016 | ||
1017 | return rv; | |
1018 | } | |
1019 | ||
1020 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1021 | unsigned char netfn, | |
c69c3127 CM |
1022 | unsigned char cmd, |
1023 | unsigned int chans) | |
1da177e4 | 1024 | { |
393d2cc3 CM |
1025 | ipmi_smi_t intf = user->intf; |
1026 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1027 | struct cmd_rcvr *rcvrs = NULL; |
1028 | int i, rv = -ENOENT; | |
1da177e4 | 1029 | |
d6dfd131 | 1030 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1031 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1032 | if (((1 << i) & chans) == 0) | |
1033 | continue; | |
1034 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1035 | if (rcvr == NULL) | |
1036 | continue; | |
1037 | if (rcvr->user == user) { | |
1038 | rv = 0; | |
1039 | rcvr->chans &= ~chans; | |
1040 | if (rcvr->chans == 0) { | |
1041 | list_del_rcu(&rcvr->link); | |
1042 | rcvr->next = rcvrs; | |
1043 | rcvrs = rcvr; | |
1044 | } | |
1045 | } | |
1046 | } | |
1047 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1048 | synchronize_rcu(); | |
1049 | while (rcvrs) { | |
1050 | rcvr = rcvrs; | |
1051 | rcvrs = rcvr->next; | |
393d2cc3 | 1052 | kfree(rcvr); |
1da177e4 | 1053 | } |
c69c3127 | 1054 | return rv; |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | void ipmi_user_set_run_to_completion(ipmi_user_t user, int val) | |
1058 | { | |
393d2cc3 CM |
1059 | ipmi_smi_t intf = user->intf; |
1060 | intf->handlers->set_run_to_completion(intf->send_info, val); | |
1da177e4 LT |
1061 | } |
1062 | ||
1063 | static unsigned char | |
1064 | ipmb_checksum(unsigned char *data, int size) | |
1065 | { | |
1066 | unsigned char csum = 0; | |
1067 | ||
1068 | for (; size > 0; size--, data++) | |
1069 | csum += *data; | |
1070 | ||
1071 | return -csum; | |
1072 | } | |
1073 | ||
1074 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1075 | struct kernel_ipmi_msg *msg, | |
1076 | struct ipmi_ipmb_addr *ipmb_addr, | |
1077 | long msgid, | |
1078 | unsigned char ipmb_seq, | |
1079 | int broadcast, | |
1080 | unsigned char source_address, | |
1081 | unsigned char source_lun) | |
1082 | { | |
1083 | int i = broadcast; | |
1084 | ||
1085 | /* Format the IPMB header data. */ | |
1086 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1087 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1088 | smi_msg->data[2] = ipmb_addr->channel; | |
1089 | if (broadcast) | |
1090 | smi_msg->data[3] = 0; | |
1091 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1092 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1093 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1094 | smi_msg->data[i+6] = source_address; | |
1095 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1096 | smi_msg->data[i+8] = msg->cmd; | |
1097 | ||
1098 | /* Now tack on the data to the message. */ | |
1099 | if (msg->data_len > 0) | |
1100 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1101 | msg->data_len); | |
1102 | smi_msg->data_size = msg->data_len + 9; | |
1103 | ||
1104 | /* Now calculate the checksum and tack it on. */ | |
1105 | smi_msg->data[i+smi_msg->data_size] | |
1106 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1107 | smi_msg->data_size-6); | |
1108 | ||
1109 | /* Add on the checksum size and the offset from the | |
1110 | broadcast. */ | |
1111 | smi_msg->data_size += 1 + i; | |
1112 | ||
1113 | smi_msg->msgid = msgid; | |
1114 | } | |
1115 | ||
1116 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1117 | struct kernel_ipmi_msg *msg, | |
1118 | struct ipmi_lan_addr *lan_addr, | |
1119 | long msgid, | |
1120 | unsigned char ipmb_seq, | |
1121 | unsigned char source_lun) | |
1122 | { | |
1123 | /* Format the IPMB header data. */ | |
1124 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1125 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1126 | smi_msg->data[2] = lan_addr->channel; | |
1127 | smi_msg->data[3] = lan_addr->session_handle; | |
1128 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1129 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1130 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1131 | smi_msg->data[7] = lan_addr->local_SWID; | |
1132 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1133 | smi_msg->data[9] = msg->cmd; | |
1134 | ||
1135 | /* Now tack on the data to the message. */ | |
1136 | if (msg->data_len > 0) | |
1137 | memcpy(&(smi_msg->data[10]), msg->data, | |
1138 | msg->data_len); | |
1139 | smi_msg->data_size = msg->data_len + 10; | |
1140 | ||
1141 | /* Now calculate the checksum and tack it on. */ | |
1142 | smi_msg->data[smi_msg->data_size] | |
1143 | = ipmb_checksum(&(smi_msg->data[7]), | |
1144 | smi_msg->data_size-7); | |
1145 | ||
1146 | /* Add on the checksum size and the offset from the | |
1147 | broadcast. */ | |
1148 | smi_msg->data_size += 1; | |
1149 | ||
1150 | smi_msg->msgid = msgid; | |
1151 | } | |
1152 | ||
1153 | /* Separate from ipmi_request so that the user does not have to be | |
1154 | supplied in certain circumstances (mainly at panic time). If | |
1155 | messages are supplied, they will be freed, even if an error | |
1156 | occurs. */ | |
393d2cc3 CM |
1157 | static int i_ipmi_request(ipmi_user_t user, |
1158 | ipmi_smi_t intf, | |
1159 | struct ipmi_addr *addr, | |
1160 | long msgid, | |
1161 | struct kernel_ipmi_msg *msg, | |
1162 | void *user_msg_data, | |
1163 | void *supplied_smi, | |
1164 | struct ipmi_recv_msg *supplied_recv, | |
1165 | int priority, | |
1166 | unsigned char source_address, | |
1167 | unsigned char source_lun, | |
1168 | int retries, | |
1169 | unsigned int retry_time_ms) | |
1da177e4 LT |
1170 | { |
1171 | int rv = 0; | |
1172 | struct ipmi_smi_msg *smi_msg; | |
1173 | struct ipmi_recv_msg *recv_msg; | |
1174 | unsigned long flags; | |
1175 | ||
1176 | ||
1177 | if (supplied_recv) { | |
1178 | recv_msg = supplied_recv; | |
1179 | } else { | |
1180 | recv_msg = ipmi_alloc_recv_msg(); | |
1181 | if (recv_msg == NULL) { | |
1182 | return -ENOMEM; | |
1183 | } | |
1184 | } | |
1185 | recv_msg->user_msg_data = user_msg_data; | |
1186 | ||
1187 | if (supplied_smi) { | |
1188 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; | |
1189 | } else { | |
1190 | smi_msg = ipmi_alloc_smi_msg(); | |
1191 | if (smi_msg == NULL) { | |
1192 | ipmi_free_recv_msg(recv_msg); | |
1193 | return -ENOMEM; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | recv_msg->user = user; | |
393d2cc3 CM |
1198 | if (user) |
1199 | kref_get(&user->refcount); | |
1da177e4 LT |
1200 | recv_msg->msgid = msgid; |
1201 | /* Store the message to send in the receive message so timeout | |
1202 | responses can get the proper response data. */ | |
1203 | recv_msg->msg = *msg; | |
1204 | ||
1205 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1206 | struct ipmi_system_interface_addr *smi_addr; | |
1207 | ||
1208 | if (msg->netfn & 1) { | |
1209 | /* Responses are not allowed to the SMI. */ | |
1210 | rv = -EINVAL; | |
1211 | goto out_err; | |
1212 | } | |
1213 | ||
1214 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1215 | if (smi_addr->lun > 3) { | |
1216 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1217 | intf->sent_invalid_commands++; | |
1218 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1219 | rv = -EINVAL; | |
1220 | goto out_err; | |
1221 | } | |
1222 | ||
1223 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1224 | ||
1225 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1226 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1227 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
1228 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) | |
1229 | { | |
1230 | /* We don't let the user do these, since we manage | |
1231 | the sequence numbers. */ | |
1232 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1233 | intf->sent_invalid_commands++; | |
1234 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1235 | rv = -EINVAL; | |
1236 | goto out_err; | |
1237 | } | |
1238 | ||
1239 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { | |
1240 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1241 | intf->sent_invalid_commands++; | |
1242 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1243 | rv = -EMSGSIZE; | |
1244 | goto out_err; | |
1245 | } | |
1246 | ||
1247 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1248 | smi_msg->data[1] = msg->cmd; | |
1249 | smi_msg->msgid = msgid; | |
1250 | smi_msg->user_data = recv_msg; | |
1251 | if (msg->data_len > 0) | |
1252 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1253 | smi_msg->data_size = msg->data_len + 2; | |
1254 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1255 | intf->sent_local_commands++; | |
1256 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1257 | } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
1258 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) | |
1259 | { | |
1260 | struct ipmi_ipmb_addr *ipmb_addr; | |
1261 | unsigned char ipmb_seq; | |
1262 | long seqid; | |
1263 | int broadcast = 0; | |
1264 | ||
9c101fd4 KZ |
1265 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
1266 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1da177e4 LT |
1267 | intf->sent_invalid_commands++; |
1268 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1269 | rv = -EINVAL; | |
1270 | goto out_err; | |
1271 | } | |
1272 | ||
1273 | if (intf->channels[addr->channel].medium | |
1274 | != IPMI_CHANNEL_MEDIUM_IPMB) | |
1275 | { | |
1276 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1277 | intf->sent_invalid_commands++; | |
1278 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1279 | rv = -EINVAL; | |
1280 | goto out_err; | |
1281 | } | |
1282 | ||
1283 | if (retries < 0) { | |
1284 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1285 | retries = 0; /* Don't retry broadcasts. */ | |
1286 | else | |
1287 | retries = 4; | |
1288 | } | |
1289 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
1290 | /* Broadcasts add a zero at the beginning of the | |
1291 | message, but otherwise is the same as an IPMB | |
1292 | address. */ | |
1293 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
1294 | broadcast = 1; | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* Default to 1 second retries. */ | |
1299 | if (retry_time_ms == 0) | |
1300 | retry_time_ms = 1000; | |
1301 | ||
1302 | /* 9 for the header and 1 for the checksum, plus | |
1303 | possibly one for the broadcast. */ | |
1304 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { | |
1305 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1306 | intf->sent_invalid_commands++; | |
1307 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1308 | rv = -EMSGSIZE; | |
1309 | goto out_err; | |
1310 | } | |
1311 | ||
1312 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1313 | if (ipmb_addr->lun > 3) { | |
1314 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1315 | intf->sent_invalid_commands++; | |
1316 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1317 | rv = -EINVAL; | |
1318 | goto out_err; | |
1319 | } | |
1320 | ||
1321 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1322 | ||
1323 | if (recv_msg->msg.netfn & 0x1) { | |
1324 | /* It's a response, so use the user's sequence | |
1325 | from msgid. */ | |
1326 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1327 | intf->sent_ipmb_responses++; | |
1328 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1329 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, | |
1330 | msgid, broadcast, | |
1331 | source_address, source_lun); | |
1332 | ||
1333 | /* Save the receive message so we can use it | |
1334 | to deliver the response. */ | |
1335 | smi_msg->user_data = recv_msg; | |
1336 | } else { | |
1337 | /* It's a command, so get a sequence for it. */ | |
1338 | ||
1339 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1340 | ||
1341 | spin_lock(&intf->counter_lock); | |
1342 | intf->sent_ipmb_commands++; | |
1343 | spin_unlock(&intf->counter_lock); | |
1344 | ||
1345 | /* Create a sequence number with a 1 second | |
1346 | timeout and 4 retries. */ | |
1347 | rv = intf_next_seq(intf, | |
1348 | recv_msg, | |
1349 | retry_time_ms, | |
1350 | retries, | |
1351 | broadcast, | |
1352 | &ipmb_seq, | |
1353 | &seqid); | |
1354 | if (rv) { | |
1355 | /* We have used up all the sequence numbers, | |
1356 | probably, so abort. */ | |
1357 | spin_unlock_irqrestore(&(intf->seq_lock), | |
1358 | flags); | |
1359 | goto out_err; | |
1360 | } | |
1361 | ||
1362 | /* Store the sequence number in the message, | |
1363 | so that when the send message response | |
1364 | comes back we can start the timer. */ | |
1365 | format_ipmb_msg(smi_msg, msg, ipmb_addr, | |
1366 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1367 | ipmb_seq, broadcast, | |
1368 | source_address, source_lun); | |
1369 | ||
1370 | /* Copy the message into the recv message data, so we | |
1371 | can retransmit it later if necessary. */ | |
1372 | memcpy(recv_msg->msg_data, smi_msg->data, | |
1373 | smi_msg->data_size); | |
1374 | recv_msg->msg.data = recv_msg->msg_data; | |
1375 | recv_msg->msg.data_len = smi_msg->data_size; | |
1376 | ||
1377 | /* We don't unlock until here, because we need | |
1378 | to copy the completed message into the | |
1379 | recv_msg before we release the lock. | |
1380 | Otherwise, race conditions may bite us. I | |
1381 | know that's pretty paranoid, but I prefer | |
1382 | to be correct. */ | |
1383 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1384 | } | |
1385 | } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
1386 | struct ipmi_lan_addr *lan_addr; | |
1387 | unsigned char ipmb_seq; | |
1388 | long seqid; | |
1389 | ||
12fc1d7b | 1390 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
1da177e4 LT |
1391 | spin_lock_irqsave(&intf->counter_lock, flags); |
1392 | intf->sent_invalid_commands++; | |
1393 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1394 | rv = -EINVAL; | |
1395 | goto out_err; | |
1396 | } | |
1397 | ||
1398 | if ((intf->channels[addr->channel].medium | |
1399 | != IPMI_CHANNEL_MEDIUM_8023LAN) | |
1400 | && (intf->channels[addr->channel].medium | |
1401 | != IPMI_CHANNEL_MEDIUM_ASYNC)) | |
1402 | { | |
1403 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1404 | intf->sent_invalid_commands++; | |
1405 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1406 | rv = -EINVAL; | |
1407 | goto out_err; | |
1408 | } | |
1409 | ||
1410 | retries = 4; | |
1411 | ||
1412 | /* Default to 1 second retries. */ | |
1413 | if (retry_time_ms == 0) | |
1414 | retry_time_ms = 1000; | |
1415 | ||
1416 | /* 11 for the header and 1 for the checksum. */ | |
1417 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
1418 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1419 | intf->sent_invalid_commands++; | |
1420 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1421 | rv = -EMSGSIZE; | |
1422 | goto out_err; | |
1423 | } | |
1424 | ||
1425 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1426 | if (lan_addr->lun > 3) { | |
1427 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1428 | intf->sent_invalid_commands++; | |
1429 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1430 | rv = -EINVAL; | |
1431 | goto out_err; | |
1432 | } | |
1433 | ||
1434 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1435 | ||
1436 | if (recv_msg->msg.netfn & 0x1) { | |
1437 | /* It's a response, so use the user's sequence | |
1438 | from msgid. */ | |
1439 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1440 | intf->sent_lan_responses++; | |
1441 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1442 | format_lan_msg(smi_msg, msg, lan_addr, msgid, | |
1443 | msgid, source_lun); | |
1444 | ||
1445 | /* Save the receive message so we can use it | |
1446 | to deliver the response. */ | |
1447 | smi_msg->user_data = recv_msg; | |
1448 | } else { | |
1449 | /* It's a command, so get a sequence for it. */ | |
1450 | ||
1451 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1452 | ||
1453 | spin_lock(&intf->counter_lock); | |
1454 | intf->sent_lan_commands++; | |
1455 | spin_unlock(&intf->counter_lock); | |
1456 | ||
1457 | /* Create a sequence number with a 1 second | |
1458 | timeout and 4 retries. */ | |
1459 | rv = intf_next_seq(intf, | |
1460 | recv_msg, | |
1461 | retry_time_ms, | |
1462 | retries, | |
1463 | 0, | |
1464 | &ipmb_seq, | |
1465 | &seqid); | |
1466 | if (rv) { | |
1467 | /* We have used up all the sequence numbers, | |
1468 | probably, so abort. */ | |
1469 | spin_unlock_irqrestore(&(intf->seq_lock), | |
1470 | flags); | |
1471 | goto out_err; | |
1472 | } | |
1473 | ||
1474 | /* Store the sequence number in the message, | |
1475 | so that when the send message response | |
1476 | comes back we can start the timer. */ | |
1477 | format_lan_msg(smi_msg, msg, lan_addr, | |
1478 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1479 | ipmb_seq, source_lun); | |
1480 | ||
1481 | /* Copy the message into the recv message data, so we | |
1482 | can retransmit it later if necessary. */ | |
1483 | memcpy(recv_msg->msg_data, smi_msg->data, | |
1484 | smi_msg->data_size); | |
1485 | recv_msg->msg.data = recv_msg->msg_data; | |
1486 | recv_msg->msg.data_len = smi_msg->data_size; | |
1487 | ||
1488 | /* We don't unlock until here, because we need | |
1489 | to copy the completed message into the | |
1490 | recv_msg before we release the lock. | |
1491 | Otherwise, race conditions may bite us. I | |
1492 | know that's pretty paranoid, but I prefer | |
1493 | to be correct. */ | |
1494 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1495 | } | |
1496 | } else { | |
1497 | /* Unknown address type. */ | |
1498 | spin_lock_irqsave(&intf->counter_lock, flags); | |
1499 | intf->sent_invalid_commands++; | |
1500 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1501 | rv = -EINVAL; | |
1502 | goto out_err; | |
1503 | } | |
1504 | ||
1505 | #ifdef DEBUG_MSGING | |
1506 | { | |
1507 | int m; | |
e8b33617 | 1508 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1509 | printk(" %2.2x", smi_msg->data[m]); |
1510 | printk("\n"); | |
1511 | } | |
1512 | #endif | |
1513 | intf->handlers->sender(intf->send_info, smi_msg, priority); | |
1514 | ||
1515 | return 0; | |
1516 | ||
1517 | out_err: | |
1518 | ipmi_free_smi_msg(smi_msg); | |
1519 | ipmi_free_recv_msg(recv_msg); | |
1520 | return rv; | |
1521 | } | |
1522 | ||
c14979b9 CM |
1523 | static int check_addr(ipmi_smi_t intf, |
1524 | struct ipmi_addr *addr, | |
1525 | unsigned char *saddr, | |
1526 | unsigned char *lun) | |
1527 | { | |
1528 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1529 | return -EINVAL; | |
1530 | *lun = intf->channels[addr->channel].lun; | |
1531 | *saddr = intf->channels[addr->channel].address; | |
1532 | return 0; | |
1533 | } | |
1534 | ||
1da177e4 LT |
1535 | int ipmi_request_settime(ipmi_user_t user, |
1536 | struct ipmi_addr *addr, | |
1537 | long msgid, | |
1538 | struct kernel_ipmi_msg *msg, | |
1539 | void *user_msg_data, | |
1540 | int priority, | |
1541 | int retries, | |
1542 | unsigned int retry_time_ms) | |
1543 | { | |
c14979b9 CM |
1544 | unsigned char saddr, lun; |
1545 | int rv; | |
1546 | ||
8a3628d5 | 1547 | if (!user) |
56a55ec6 | 1548 | return -EINVAL; |
c14979b9 CM |
1549 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1550 | if (rv) | |
1551 | return rv; | |
1da177e4 LT |
1552 | return i_ipmi_request(user, |
1553 | user->intf, | |
1554 | addr, | |
1555 | msgid, | |
1556 | msg, | |
1557 | user_msg_data, | |
1558 | NULL, NULL, | |
1559 | priority, | |
c14979b9 CM |
1560 | saddr, |
1561 | lun, | |
1da177e4 LT |
1562 | retries, |
1563 | retry_time_ms); | |
1564 | } | |
1565 | ||
1566 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1567 | struct ipmi_addr *addr, | |
1568 | long msgid, | |
1569 | struct kernel_ipmi_msg *msg, | |
1570 | void *user_msg_data, | |
1571 | void *supplied_smi, | |
1572 | struct ipmi_recv_msg *supplied_recv, | |
1573 | int priority) | |
1574 | { | |
c14979b9 CM |
1575 | unsigned char saddr, lun; |
1576 | int rv; | |
1577 | ||
8a3628d5 | 1578 | if (!user) |
56a55ec6 | 1579 | return -EINVAL; |
c14979b9 CM |
1580 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1581 | if (rv) | |
1582 | return rv; | |
1da177e4 LT |
1583 | return i_ipmi_request(user, |
1584 | user->intf, | |
1585 | addr, | |
1586 | msgid, | |
1587 | msg, | |
1588 | user_msg_data, | |
1589 | supplied_smi, | |
1590 | supplied_recv, | |
1591 | priority, | |
c14979b9 CM |
1592 | saddr, |
1593 | lun, | |
1da177e4 LT |
1594 | -1, 0); |
1595 | } | |
1596 | ||
1597 | static int ipmb_file_read_proc(char *page, char **start, off_t off, | |
1598 | int count, int *eof, void *data) | |
1599 | { | |
1600 | char *out = (char *) page; | |
1601 | ipmi_smi_t intf = data; | |
c14979b9 | 1602 | int i; |
8a3628d5 | 1603 | int rv = 0; |
1da177e4 | 1604 | |
e8b33617 | 1605 | for (i = 0; i < IPMI_MAX_CHANNELS; i++) |
c14979b9 CM |
1606 | rv += sprintf(out+rv, "%x ", intf->channels[i].address); |
1607 | out[rv-1] = '\n'; /* Replace the final space with a newline */ | |
1608 | out[rv] = '\0'; | |
1609 | rv++; | |
1610 | return rv; | |
1da177e4 LT |
1611 | } |
1612 | ||
1613 | static int version_file_read_proc(char *page, char **start, off_t off, | |
1614 | int count, int *eof, void *data) | |
1615 | { | |
1616 | char *out = (char *) page; | |
1617 | ipmi_smi_t intf = data; | |
1618 | ||
1619 | return sprintf(out, "%d.%d\n", | |
50c812b2 CM |
1620 | ipmi_version_major(&intf->bmc->id), |
1621 | ipmi_version_minor(&intf->bmc->id)); | |
1da177e4 LT |
1622 | } |
1623 | ||
1624 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
1625 | int count, int *eof, void *data) | |
1626 | { | |
1627 | char *out = (char *) page; | |
1628 | ipmi_smi_t intf = data; | |
1629 | ||
1630 | out += sprintf(out, "sent_invalid_commands: %d\n", | |
1631 | intf->sent_invalid_commands); | |
1632 | out += sprintf(out, "sent_local_commands: %d\n", | |
1633 | intf->sent_local_commands); | |
1634 | out += sprintf(out, "handled_local_responses: %d\n", | |
1635 | intf->handled_local_responses); | |
1636 | out += sprintf(out, "unhandled_local_responses: %d\n", | |
1637 | intf->unhandled_local_responses); | |
1638 | out += sprintf(out, "sent_ipmb_commands: %d\n", | |
1639 | intf->sent_ipmb_commands); | |
1640 | out += sprintf(out, "sent_ipmb_command_errs: %d\n", | |
1641 | intf->sent_ipmb_command_errs); | |
1642 | out += sprintf(out, "retransmitted_ipmb_commands: %d\n", | |
1643 | intf->retransmitted_ipmb_commands); | |
1644 | out += sprintf(out, "timed_out_ipmb_commands: %d\n", | |
1645 | intf->timed_out_ipmb_commands); | |
1646 | out += sprintf(out, "timed_out_ipmb_broadcasts: %d\n", | |
1647 | intf->timed_out_ipmb_broadcasts); | |
1648 | out += sprintf(out, "sent_ipmb_responses: %d\n", | |
1649 | intf->sent_ipmb_responses); | |
1650 | out += sprintf(out, "handled_ipmb_responses: %d\n", | |
1651 | intf->handled_ipmb_responses); | |
1652 | out += sprintf(out, "invalid_ipmb_responses: %d\n", | |
1653 | intf->invalid_ipmb_responses); | |
1654 | out += sprintf(out, "unhandled_ipmb_responses: %d\n", | |
1655 | intf->unhandled_ipmb_responses); | |
1656 | out += sprintf(out, "sent_lan_commands: %d\n", | |
1657 | intf->sent_lan_commands); | |
1658 | out += sprintf(out, "sent_lan_command_errs: %d\n", | |
1659 | intf->sent_lan_command_errs); | |
1660 | out += sprintf(out, "retransmitted_lan_commands: %d\n", | |
1661 | intf->retransmitted_lan_commands); | |
1662 | out += sprintf(out, "timed_out_lan_commands: %d\n", | |
1663 | intf->timed_out_lan_commands); | |
1664 | out += sprintf(out, "sent_lan_responses: %d\n", | |
1665 | intf->sent_lan_responses); | |
1666 | out += sprintf(out, "handled_lan_responses: %d\n", | |
1667 | intf->handled_lan_responses); | |
1668 | out += sprintf(out, "invalid_lan_responses: %d\n", | |
1669 | intf->invalid_lan_responses); | |
1670 | out += sprintf(out, "unhandled_lan_responses: %d\n", | |
1671 | intf->unhandled_lan_responses); | |
1672 | out += sprintf(out, "handled_commands: %d\n", | |
1673 | intf->handled_commands); | |
1674 | out += sprintf(out, "invalid_commands: %d\n", | |
1675 | intf->invalid_commands); | |
1676 | out += sprintf(out, "unhandled_commands: %d\n", | |
1677 | intf->unhandled_commands); | |
1678 | out += sprintf(out, "invalid_events: %d\n", | |
1679 | intf->invalid_events); | |
1680 | out += sprintf(out, "events: %d\n", | |
1681 | intf->events); | |
1682 | ||
1683 | return (out - ((char *) page)); | |
1684 | } | |
1685 | ||
1686 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
1687 | read_proc_t *read_proc, write_proc_t *write_proc, | |
1688 | void *data, struct module *owner) | |
1689 | { | |
1da177e4 | 1690 | int rv = 0; |
3b625943 CM |
1691 | #ifdef CONFIG_PROC_FS |
1692 | struct proc_dir_entry *file; | |
1da177e4 LT |
1693 | struct ipmi_proc_entry *entry; |
1694 | ||
1695 | /* Create a list element. */ | |
1696 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
1697 | if (!entry) | |
1698 | return -ENOMEM; | |
1699 | entry->name = kmalloc(strlen(name)+1, GFP_KERNEL); | |
1700 | if (!entry->name) { | |
1701 | kfree(entry); | |
1702 | return -ENOMEM; | |
1703 | } | |
1704 | strcpy(entry->name, name); | |
1705 | ||
1706 | file = create_proc_entry(name, 0, smi->proc_dir); | |
1707 | if (!file) { | |
1708 | kfree(entry->name); | |
1709 | kfree(entry); | |
1710 | rv = -ENOMEM; | |
1711 | } else { | |
1712 | file->nlink = 1; | |
1713 | file->data = data; | |
1714 | file->read_proc = read_proc; | |
1715 | file->write_proc = write_proc; | |
1716 | file->owner = owner; | |
1717 | ||
3b625943 | 1718 | spin_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1719 | /* Stick it on the list. */ |
1720 | entry->next = smi->proc_entries; | |
1721 | smi->proc_entries = entry; | |
3b625943 | 1722 | spin_unlock(&smi->proc_entry_lock); |
1da177e4 | 1723 | } |
3b625943 | 1724 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1725 | |
1726 | return rv; | |
1727 | } | |
1728 | ||
1729 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
1730 | { | |
1731 | int rv = 0; | |
1732 | ||
3b625943 | 1733 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1734 | sprintf(smi->proc_dir_name, "%d", num); |
1735 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
1736 | if (!smi->proc_dir) | |
1737 | rv = -ENOMEM; | |
1738 | else { | |
1739 | smi->proc_dir->owner = THIS_MODULE; | |
1740 | } | |
1741 | ||
1742 | if (rv == 0) | |
1743 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
1744 | stat_file_read_proc, NULL, | |
1745 | smi, THIS_MODULE); | |
1746 | ||
1747 | if (rv == 0) | |
1748 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
1749 | ipmb_file_read_proc, NULL, | |
1750 | smi, THIS_MODULE); | |
1751 | ||
1752 | if (rv == 0) | |
1753 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
1754 | version_file_read_proc, NULL, | |
1755 | smi, THIS_MODULE); | |
3b625943 | 1756 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1757 | |
1758 | return rv; | |
1759 | } | |
1760 | ||
1761 | static void remove_proc_entries(ipmi_smi_t smi) | |
1762 | { | |
3b625943 | 1763 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1764 | struct ipmi_proc_entry *entry; |
1765 | ||
3b625943 | 1766 | spin_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1767 | while (smi->proc_entries) { |
1768 | entry = smi->proc_entries; | |
1769 | smi->proc_entries = entry->next; | |
1770 | ||
1771 | remove_proc_entry(entry->name, smi->proc_dir); | |
1772 | kfree(entry->name); | |
1773 | kfree(entry); | |
1774 | } | |
3b625943 | 1775 | spin_unlock(&smi->proc_entry_lock); |
1da177e4 | 1776 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 1777 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1778 | } |
1779 | ||
50c812b2 CM |
1780 | static int __find_bmc_guid(struct device *dev, void *data) |
1781 | { | |
1782 | unsigned char *id = data; | |
1783 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1784 | return memcmp(bmc->guid, id, 16) == 0; | |
1785 | } | |
1786 | ||
1787 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
1788 | unsigned char *guid) | |
1789 | { | |
1790 | struct device *dev; | |
1791 | ||
1792 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
1793 | if (dev) | |
1794 | return dev_get_drvdata(dev); | |
1795 | else | |
1796 | return NULL; | |
1797 | } | |
1798 | ||
1799 | struct prod_dev_id { | |
1800 | unsigned int product_id; | |
1801 | unsigned char device_id; | |
1802 | }; | |
1803 | ||
1804 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
1805 | { | |
1806 | struct prod_dev_id *id = data; | |
1807 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1808 | ||
1809 | return (bmc->id.product_id == id->product_id | |
1810 | && bmc->id.product_id == id->product_id | |
1811 | && bmc->id.device_id == id->device_id); | |
1812 | } | |
1813 | ||
1814 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
1815 | struct device_driver *drv, | |
1816 | unsigned char product_id, unsigned char device_id) | |
1817 | { | |
1818 | struct prod_dev_id id = { | |
1819 | .product_id = product_id, | |
1820 | .device_id = device_id, | |
1821 | }; | |
1822 | struct device *dev; | |
1823 | ||
1824 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
1825 | if (dev) | |
1826 | return dev_get_drvdata(dev); | |
1827 | else | |
1828 | return NULL; | |
1829 | } | |
1830 | ||
1831 | static ssize_t device_id_show(struct device *dev, | |
1832 | struct device_attribute *attr, | |
1833 | char *buf) | |
1834 | { | |
1835 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1836 | ||
1837 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
1838 | } | |
1839 | ||
1840 | static ssize_t provides_dev_sdrs_show(struct device *dev, | |
1841 | struct device_attribute *attr, | |
1842 | char *buf) | |
1843 | { | |
1844 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1845 | ||
1846 | return snprintf(buf, 10, "%u\n", | |
1847 | bmc->id.device_revision && 0x80 >> 7); | |
1848 | } | |
1849 | ||
1850 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
1851 | char *buf) | |
1852 | { | |
1853 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1854 | ||
1855 | return snprintf(buf, 20, "%u\n", | |
1856 | bmc->id.device_revision && 0x0F); | |
1857 | } | |
1858 | ||
1859 | static ssize_t firmware_rev_show(struct device *dev, | |
1860 | struct device_attribute *attr, | |
1861 | char *buf) | |
1862 | { | |
1863 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1864 | ||
1865 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
1866 | bmc->id.firmware_revision_2); | |
1867 | } | |
1868 | ||
1869 | static ssize_t ipmi_version_show(struct device *dev, | |
1870 | struct device_attribute *attr, | |
1871 | char *buf) | |
1872 | { | |
1873 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1874 | ||
1875 | return snprintf(buf, 20, "%u.%u\n", | |
1876 | ipmi_version_major(&bmc->id), | |
1877 | ipmi_version_minor(&bmc->id)); | |
1878 | } | |
1879 | ||
1880 | static ssize_t add_dev_support_show(struct device *dev, | |
1881 | struct device_attribute *attr, | |
1882 | char *buf) | |
1883 | { | |
1884 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1885 | ||
1886 | return snprintf(buf, 10, "0x%02x\n", | |
1887 | bmc->id.additional_device_support); | |
1888 | } | |
1889 | ||
1890 | static ssize_t manufacturer_id_show(struct device *dev, | |
1891 | struct device_attribute *attr, | |
1892 | char *buf) | |
1893 | { | |
1894 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1895 | ||
1896 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
1897 | } | |
1898 | ||
1899 | static ssize_t product_id_show(struct device *dev, | |
1900 | struct device_attribute *attr, | |
1901 | char *buf) | |
1902 | { | |
1903 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1904 | ||
1905 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
1906 | } | |
1907 | ||
1908 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
1909 | struct device_attribute *attr, | |
1910 | char *buf) | |
1911 | { | |
1912 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1913 | ||
1914 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
1915 | bmc->id.aux_firmware_revision[3], | |
1916 | bmc->id.aux_firmware_revision[2], | |
1917 | bmc->id.aux_firmware_revision[1], | |
1918 | bmc->id.aux_firmware_revision[0]); | |
1919 | } | |
1920 | ||
1921 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
1922 | char *buf) | |
1923 | { | |
1924 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
1925 | ||
1926 | return snprintf(buf, 100, "%Lx%Lx\n", | |
1927 | (long long) bmc->guid[0], | |
1928 | (long long) bmc->guid[8]); | |
1929 | } | |
1930 | ||
1931 | static void | |
1932 | cleanup_bmc_device(struct kref *ref) | |
1933 | { | |
1934 | struct bmc_device *bmc; | |
1935 | ||
1936 | bmc = container_of(ref, struct bmc_device, refcount); | |
1937 | ||
1938 | device_remove_file(&bmc->dev->dev, | |
1939 | &bmc->device_id_attr); | |
1940 | device_remove_file(&bmc->dev->dev, | |
1941 | &bmc->provides_dev_sdrs_attr); | |
1942 | device_remove_file(&bmc->dev->dev, | |
1943 | &bmc->revision_attr); | |
1944 | device_remove_file(&bmc->dev->dev, | |
1945 | &bmc->firmware_rev_attr); | |
1946 | device_remove_file(&bmc->dev->dev, | |
1947 | &bmc->version_attr); | |
1948 | device_remove_file(&bmc->dev->dev, | |
1949 | &bmc->add_dev_support_attr); | |
1950 | device_remove_file(&bmc->dev->dev, | |
1951 | &bmc->manufacturer_id_attr); | |
1952 | device_remove_file(&bmc->dev->dev, | |
1953 | &bmc->product_id_attr); | |
1954 | if (bmc->id.aux_firmware_revision_set) | |
1955 | device_remove_file(&bmc->dev->dev, | |
1956 | &bmc->aux_firmware_rev_attr); | |
1957 | if (bmc->guid_set) | |
1958 | device_remove_file(&bmc->dev->dev, | |
1959 | &bmc->guid_attr); | |
1960 | platform_device_unregister(bmc->dev); | |
1961 | kfree(bmc); | |
1962 | } | |
1963 | ||
1964 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
1965 | { | |
1966 | struct bmc_device *bmc = intf->bmc; | |
1967 | ||
1968 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); | |
1969 | if (intf->my_dev_name) { | |
1970 | sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name); | |
1971 | kfree(intf->my_dev_name); | |
1972 | intf->my_dev_name = NULL; | |
1973 | } | |
1974 | ||
1975 | mutex_lock(&ipmidriver_mutex); | |
1976 | kref_put(&bmc->refcount, cleanup_bmc_device); | |
1977 | mutex_unlock(&ipmidriver_mutex); | |
1978 | } | |
1979 | ||
1980 | static int ipmi_bmc_register(ipmi_smi_t intf) | |
1981 | { | |
1982 | int rv; | |
1983 | struct bmc_device *bmc = intf->bmc; | |
1984 | struct bmc_device *old_bmc; | |
1985 | int size; | |
1986 | char dummy[1]; | |
1987 | ||
1988 | mutex_lock(&ipmidriver_mutex); | |
1989 | ||
1990 | /* | |
1991 | * Try to find if there is an bmc_device struct | |
1992 | * representing the interfaced BMC already | |
1993 | */ | |
1994 | if (bmc->guid_set) | |
1995 | old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid); | |
1996 | else | |
1997 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver, | |
1998 | bmc->id.product_id, | |
1999 | bmc->id.device_id); | |
2000 | ||
2001 | /* | |
2002 | * If there is already an bmc_device, free the new one, | |
2003 | * otherwise register the new BMC device | |
2004 | */ | |
2005 | if (old_bmc) { | |
2006 | kfree(bmc); | |
2007 | intf->bmc = old_bmc; | |
2008 | bmc = old_bmc; | |
2009 | ||
2010 | kref_get(&bmc->refcount); | |
2011 | mutex_unlock(&ipmidriver_mutex); | |
2012 | ||
2013 | printk(KERN_INFO | |
2014 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2015 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2016 | bmc->id.manufacturer_id, | |
2017 | bmc->id.product_id, | |
2018 | bmc->id.device_id); | |
2019 | } else { | |
2020 | bmc->dev = platform_device_alloc("ipmi_bmc", | |
2021 | bmc->id.device_id); | |
8a3628d5 | 2022 | if (!bmc->dev) { |
50c812b2 CM |
2023 | printk(KERN_ERR |
2024 | "ipmi_msghandler:" | |
2025 | " Unable to allocate platform device\n"); | |
2026 | return -ENOMEM; | |
2027 | } | |
2028 | bmc->dev->dev.driver = &ipmidriver; | |
2029 | dev_set_drvdata(&bmc->dev->dev, bmc); | |
2030 | kref_init(&bmc->refcount); | |
2031 | ||
2032 | rv = platform_device_register(bmc->dev); | |
2033 | mutex_unlock(&ipmidriver_mutex); | |
2034 | if (rv) { | |
2035 | printk(KERN_ERR | |
2036 | "ipmi_msghandler:" | |
2037 | " Unable to register bmc device: %d\n", | |
2038 | rv); | |
2039 | /* Don't go to out_err, you can only do that if | |
2040 | the device is registered already. */ | |
2041 | return rv; | |
2042 | } | |
2043 | ||
2044 | bmc->device_id_attr.attr.name = "device_id"; | |
2045 | bmc->device_id_attr.attr.owner = THIS_MODULE; | |
2046 | bmc->device_id_attr.attr.mode = S_IRUGO; | |
2047 | bmc->device_id_attr.show = device_id_show; | |
2048 | ||
2049 | bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs"; | |
2050 | bmc->provides_dev_sdrs_attr.attr.owner = THIS_MODULE; | |
2051 | bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO; | |
2052 | bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show; | |
2053 | ||
2054 | ||
2055 | bmc->revision_attr.attr.name = "revision"; | |
2056 | bmc->revision_attr.attr.owner = THIS_MODULE; | |
2057 | bmc->revision_attr.attr.mode = S_IRUGO; | |
2058 | bmc->revision_attr.show = revision_show; | |
2059 | ||
2060 | bmc->firmware_rev_attr.attr.name = "firmware_revision"; | |
2061 | bmc->firmware_rev_attr.attr.owner = THIS_MODULE; | |
2062 | bmc->firmware_rev_attr.attr.mode = S_IRUGO; | |
2063 | bmc->firmware_rev_attr.show = firmware_rev_show; | |
2064 | ||
2065 | bmc->version_attr.attr.name = "ipmi_version"; | |
2066 | bmc->version_attr.attr.owner = THIS_MODULE; | |
2067 | bmc->version_attr.attr.mode = S_IRUGO; | |
2068 | bmc->version_attr.show = ipmi_version_show; | |
2069 | ||
2070 | bmc->add_dev_support_attr.attr.name | |
2071 | = "additional_device_support"; | |
2072 | bmc->add_dev_support_attr.attr.owner = THIS_MODULE; | |
2073 | bmc->add_dev_support_attr.attr.mode = S_IRUGO; | |
2074 | bmc->add_dev_support_attr.show = add_dev_support_show; | |
2075 | ||
2076 | bmc->manufacturer_id_attr.attr.name = "manufacturer_id"; | |
2077 | bmc->manufacturer_id_attr.attr.owner = THIS_MODULE; | |
2078 | bmc->manufacturer_id_attr.attr.mode = S_IRUGO; | |
2079 | bmc->manufacturer_id_attr.show = manufacturer_id_show; | |
2080 | ||
2081 | bmc->product_id_attr.attr.name = "product_id"; | |
2082 | bmc->product_id_attr.attr.owner = THIS_MODULE; | |
2083 | bmc->product_id_attr.attr.mode = S_IRUGO; | |
2084 | bmc->product_id_attr.show = product_id_show; | |
2085 | ||
2086 | bmc->guid_attr.attr.name = "guid"; | |
2087 | bmc->guid_attr.attr.owner = THIS_MODULE; | |
2088 | bmc->guid_attr.attr.mode = S_IRUGO; | |
2089 | bmc->guid_attr.show = guid_show; | |
2090 | ||
2091 | bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision"; | |
2092 | bmc->aux_firmware_rev_attr.attr.owner = THIS_MODULE; | |
2093 | bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO; | |
2094 | bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show; | |
2095 | ||
2096 | device_create_file(&bmc->dev->dev, | |
2097 | &bmc->device_id_attr); | |
2098 | device_create_file(&bmc->dev->dev, | |
2099 | &bmc->provides_dev_sdrs_attr); | |
2100 | device_create_file(&bmc->dev->dev, | |
2101 | &bmc->revision_attr); | |
2102 | device_create_file(&bmc->dev->dev, | |
2103 | &bmc->firmware_rev_attr); | |
2104 | device_create_file(&bmc->dev->dev, | |
2105 | &bmc->version_attr); | |
2106 | device_create_file(&bmc->dev->dev, | |
2107 | &bmc->add_dev_support_attr); | |
2108 | device_create_file(&bmc->dev->dev, | |
2109 | &bmc->manufacturer_id_attr); | |
2110 | device_create_file(&bmc->dev->dev, | |
2111 | &bmc->product_id_attr); | |
2112 | if (bmc->id.aux_firmware_revision_set) | |
2113 | device_create_file(&bmc->dev->dev, | |
2114 | &bmc->aux_firmware_rev_attr); | |
2115 | if (bmc->guid_set) | |
2116 | device_create_file(&bmc->dev->dev, | |
2117 | &bmc->guid_attr); | |
2118 | ||
2119 | printk(KERN_INFO | |
2120 | "ipmi: Found new BMC (man_id: 0x%6.6x, " | |
2121 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2122 | bmc->id.manufacturer_id, | |
2123 | bmc->id.product_id, | |
2124 | bmc->id.device_id); | |
2125 | } | |
2126 | ||
2127 | /* | |
2128 | * create symlink from system interface device to bmc device | |
2129 | * and back. | |
2130 | */ | |
2131 | rv = sysfs_create_link(&intf->si_dev->kobj, | |
2132 | &bmc->dev->dev.kobj, "bmc"); | |
2133 | if (rv) { | |
2134 | printk(KERN_ERR | |
2135 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2136 | rv); | |
2137 | goto out_err; | |
2138 | } | |
2139 | ||
2140 | size = snprintf(dummy, 0, "ipmi%d", intf->intf_num); | |
2141 | intf->my_dev_name = kmalloc(size+1, GFP_KERNEL); | |
2142 | if (!intf->my_dev_name) { | |
2143 | rv = -ENOMEM; | |
2144 | printk(KERN_ERR | |
2145 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2146 | rv); | |
2147 | goto out_err; | |
2148 | } | |
2149 | snprintf(intf->my_dev_name, size+1, "ipmi%d", intf->intf_num); | |
2150 | ||
2151 | rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj, | |
2152 | intf->my_dev_name); | |
2153 | if (rv) { | |
2154 | kfree(intf->my_dev_name); | |
2155 | intf->my_dev_name = NULL; | |
2156 | printk(KERN_ERR | |
2157 | "ipmi_msghandler:" | |
2158 | " Unable to create symlink to bmc: %d\n", | |
2159 | rv); | |
2160 | goto out_err; | |
2161 | } | |
2162 | ||
2163 | return 0; | |
2164 | ||
2165 | out_err: | |
2166 | ipmi_bmc_unregister(intf); | |
2167 | return rv; | |
2168 | } | |
2169 | ||
2170 | static int | |
2171 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2172 | { | |
2173 | struct kernel_ipmi_msg msg; | |
2174 | struct ipmi_system_interface_addr si; | |
2175 | ||
2176 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2177 | si.channel = IPMI_BMC_CHANNEL; | |
2178 | si.lun = 0; | |
2179 | ||
2180 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2181 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2182 | msg.data = NULL; | |
2183 | msg.data_len = 0; | |
2184 | return i_ipmi_request(NULL, | |
2185 | intf, | |
2186 | (struct ipmi_addr *) &si, | |
2187 | 0, | |
2188 | &msg, | |
2189 | intf, | |
2190 | NULL, | |
2191 | NULL, | |
2192 | 0, | |
2193 | intf->channels[0].address, | |
2194 | intf->channels[0].lun, | |
2195 | -1, 0); | |
2196 | } | |
2197 | ||
2198 | static void | |
2199 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2200 | { | |
2201 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2202 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2203 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2204 | /* Not for me */ | |
2205 | return; | |
2206 | ||
2207 | if (msg->msg.data[0] != 0) { | |
2208 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2209 | intf->bmc->guid_set = 0; | |
2210 | goto out; | |
2211 | } | |
2212 | ||
2213 | if (msg->msg.data_len < 17) { | |
2214 | intf->bmc->guid_set = 0; | |
2215 | printk(KERN_WARNING PFX | |
2216 | "guid_handler: The GUID response from the BMC was too" | |
2217 | " short, it was %d but should have been 17. Assuming" | |
2218 | " GUID is not available.\n", | |
2219 | msg->msg.data_len); | |
2220 | goto out; | |
2221 | } | |
2222 | ||
2223 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2224 | intf->bmc->guid_set = 1; | |
2225 | out: | |
2226 | wake_up(&intf->waitq); | |
2227 | } | |
2228 | ||
2229 | static void | |
2230 | get_guid(ipmi_smi_t intf) | |
2231 | { | |
2232 | int rv; | |
2233 | ||
2234 | intf->bmc->guid_set = 0x2; | |
2235 | intf->null_user_handler = guid_handler; | |
2236 | rv = send_guid_cmd(intf, 0); | |
2237 | if (rv) | |
2238 | /* Send failed, no GUID available. */ | |
2239 | intf->bmc->guid_set = 0; | |
2240 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2241 | intf->null_user_handler = NULL; | |
2242 | } | |
2243 | ||
1da177e4 LT |
2244 | static int |
2245 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2246 | { | |
2247 | struct kernel_ipmi_msg msg; | |
2248 | unsigned char data[1]; | |
2249 | struct ipmi_system_interface_addr si; | |
2250 | ||
2251 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2252 | si.channel = IPMI_BMC_CHANNEL; | |
2253 | si.lun = 0; | |
2254 | ||
2255 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2256 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2257 | msg.data = data; | |
2258 | msg.data_len = 1; | |
2259 | data[0] = chan; | |
2260 | return i_ipmi_request(NULL, | |
2261 | intf, | |
2262 | (struct ipmi_addr *) &si, | |
2263 | 0, | |
2264 | &msg, | |
56a55ec6 | 2265 | intf, |
1da177e4 LT |
2266 | NULL, |
2267 | NULL, | |
2268 | 0, | |
c14979b9 CM |
2269 | intf->channels[0].address, |
2270 | intf->channels[0].lun, | |
1da177e4 LT |
2271 | -1, 0); |
2272 | } | |
2273 | ||
2274 | static void | |
56a55ec6 | 2275 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2276 | { |
2277 | int rv = 0; | |
2278 | int chan; | |
2279 | ||
56a55ec6 CM |
2280 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2281 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
2282 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) | |
1da177e4 LT |
2283 | { |
2284 | /* It's the one we want */ | |
56a55ec6 | 2285 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2286 | /* Got an error from the channel, just go on. */ |
2287 | ||
56a55ec6 | 2288 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
1da177e4 LT |
2289 | /* If the MC does not support this |
2290 | command, that is legal. We just | |
2291 | assume it has one IPMB at channel | |
2292 | zero. */ | |
2293 | intf->channels[0].medium | |
2294 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2295 | intf->channels[0].protocol | |
2296 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
2297 | rv = -ENOSYS; | |
2298 | ||
2299 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2300 | wake_up(&intf->waitq); | |
2301 | goto out; | |
2302 | } | |
2303 | goto next_channel; | |
2304 | } | |
56a55ec6 | 2305 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2306 | /* Message not big enough, just go on. */ |
2307 | goto next_channel; | |
2308 | } | |
2309 | chan = intf->curr_channel; | |
56a55ec6 CM |
2310 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2311 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 LT |
2312 | |
2313 | next_channel: | |
2314 | intf->curr_channel++; | |
2315 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2316 | wake_up(&intf->waitq); | |
2317 | else | |
2318 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2319 | ||
2320 | if (rv) { | |
2321 | /* Got an error somehow, just give up. */ | |
2322 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2323 | wake_up(&intf->waitq); | |
2324 | ||
2325 | printk(KERN_WARNING PFX | |
2326 | "Error sending channel information: %d\n", | |
2327 | rv); | |
2328 | } | |
2329 | } | |
2330 | out: | |
2331 | return; | |
2332 | } | |
2333 | ||
2334 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, | |
2335 | void *send_info, | |
50c812b2 CM |
2336 | struct ipmi_device_id *device_id, |
2337 | struct device *si_dev, | |
453823ba | 2338 | unsigned char slave_addr) |
1da177e4 LT |
2339 | { |
2340 | int i, j; | |
2341 | int rv; | |
393d2cc3 | 2342 | ipmi_smi_t intf; |
1da177e4 | 2343 | unsigned long flags; |
50c812b2 CM |
2344 | int version_major; |
2345 | int version_minor; | |
1da177e4 | 2346 | |
50c812b2 CM |
2347 | version_major = ipmi_version_major(device_id); |
2348 | version_minor = ipmi_version_minor(device_id); | |
1da177e4 LT |
2349 | |
2350 | /* Make sure the driver is actually initialized, this handles | |
2351 | problems with initialization order. */ | |
2352 | if (!initialized) { | |
2353 | rv = ipmi_init_msghandler(); | |
2354 | if (rv) | |
2355 | return rv; | |
2356 | /* The init code doesn't return an error if it was turned | |
2357 | off, but it won't initialize. Check that. */ | |
2358 | if (!initialized) | |
2359 | return -ENODEV; | |
2360 | } | |
2361 | ||
393d2cc3 CM |
2362 | intf = kmalloc(sizeof(*intf), GFP_KERNEL); |
2363 | if (!intf) | |
1da177e4 | 2364 | return -ENOMEM; |
393d2cc3 | 2365 | memset(intf, 0, sizeof(*intf)); |
50c812b2 CM |
2366 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2367 | if (!intf->bmc) { | |
2368 | kfree(intf); | |
2369 | return -ENOMEM; | |
2370 | } | |
393d2cc3 CM |
2371 | intf->intf_num = -1; |
2372 | kref_init(&intf->refcount); | |
50c812b2 CM |
2373 | intf->bmc->id = *device_id; |
2374 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2375 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2376 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2377 | intf->channels[j].lun = 2; | |
2378 | } | |
2379 | if (slave_addr != 0) | |
2380 | intf->channels[0].address = slave_addr; | |
2381 | INIT_LIST_HEAD(&intf->users); | |
2382 | intf->handlers = handlers; | |
2383 | intf->send_info = send_info; | |
2384 | spin_lock_init(&intf->seq_lock); | |
2385 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2386 | intf->seq_table[j].inuse = 0; | |
2387 | intf->seq_table[j].seqid = 0; | |
2388 | } | |
2389 | intf->curr_seq = 0; | |
2390 | #ifdef CONFIG_PROC_FS | |
2391 | spin_lock_init(&intf->proc_entry_lock); | |
2392 | #endif | |
2393 | spin_lock_init(&intf->waiting_msgs_lock); | |
2394 | INIT_LIST_HEAD(&intf->waiting_msgs); | |
2395 | spin_lock_init(&intf->events_lock); | |
2396 | INIT_LIST_HEAD(&intf->waiting_events); | |
2397 | intf->waiting_events_count = 0; | |
d6dfd131 | 2398 | mutex_init(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
2399 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2400 | init_waitqueue_head(&intf->waitq); | |
2401 | ||
2402 | spin_lock_init(&intf->counter_lock); | |
2403 | intf->proc_dir = NULL; | |
1da177e4 LT |
2404 | |
2405 | rv = -ENOMEM; | |
393d2cc3 | 2406 | spin_lock_irqsave(&interfaces_lock, flags); |
e8b33617 | 2407 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 | 2408 | if (ipmi_interfaces[i] == NULL) { |
393d2cc3 CM |
2409 | intf->intf_num = i; |
2410 | /* Reserve the entry till we are done. */ | |
2411 | ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY; | |
1da177e4 | 2412 | rv = 0; |
1da177e4 LT |
2413 | break; |
2414 | } | |
2415 | } | |
393d2cc3 CM |
2416 | spin_unlock_irqrestore(&interfaces_lock, flags); |
2417 | if (rv) | |
2418 | goto out; | |
1da177e4 | 2419 | |
453823ba CM |
2420 | rv = handlers->start_processing(send_info, intf); |
2421 | if (rv) | |
2422 | goto out; | |
1da177e4 | 2423 | |
50c812b2 CM |
2424 | get_guid(intf); |
2425 | ||
393d2cc3 CM |
2426 | if ((version_major > 1) |
2427 | || ((version_major == 1) && (version_minor >= 5))) | |
2428 | { | |
2429 | /* Start scanning the channels to see what is | |
2430 | available. */ | |
2431 | intf->null_user_handler = channel_handler; | |
2432 | intf->curr_channel = 0; | |
2433 | rv = send_channel_info_cmd(intf, 0); | |
2434 | if (rv) | |
2435 | goto out; | |
1da177e4 | 2436 | |
393d2cc3 CM |
2437 | /* Wait for the channel info to be read. */ |
2438 | wait_event(intf->waitq, | |
2439 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2440 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2441 | } else { |
2442 | /* Assume a single IPMB channel at zero. */ | |
2443 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2444 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2445 | } |
2446 | ||
393d2cc3 CM |
2447 | if (rv == 0) |
2448 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2449 | |
50c812b2 CM |
2450 | rv = ipmi_bmc_register(intf); |
2451 | ||
393d2cc3 | 2452 | out: |
1da177e4 | 2453 | if (rv) { |
393d2cc3 CM |
2454 | if (intf->proc_dir) |
2455 | remove_proc_entries(intf); | |
2456 | kref_put(&intf->refcount, intf_free); | |
2457 | if (i < MAX_IPMI_INTERFACES) { | |
2458 | spin_lock_irqsave(&interfaces_lock, flags); | |
2459 | ipmi_interfaces[i] = NULL; | |
2460 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
2461 | } | |
2462 | } else { | |
2463 | spin_lock_irqsave(&interfaces_lock, flags); | |
2464 | ipmi_interfaces[i] = intf; | |
2465 | spin_unlock_irqrestore(&interfaces_lock, flags); | |
50c812b2 | 2466 | call_smi_watchers(i, intf->si_dev); |
1da177e4 LT |
2467 | } |
2468 | ||
2469 | return rv; | |
2470 | } | |
2471 | ||
1da177e4 LT |
2472 | int ipmi_unregister_smi(ipmi_smi_t intf) |
2473 | { | |
1da177e4 LT |
2474 | int i; |
2475 | struct ipmi_smi_watcher *w; | |
2476 | unsigned long flags; | |
2477 | ||
50c812b2 CM |
2478 | ipmi_bmc_unregister(intf); |
2479 | ||
393d2cc3 CM |
2480 | spin_lock_irqsave(&interfaces_lock, flags); |
2481 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { | |
2482 | if (ipmi_interfaces[i] == intf) { | |
2483 | /* Set the interface number reserved until we | |
2484 | * are done. */ | |
2485 | ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY; | |
2486 | intf->intf_num = -1; | |
2487 | break; | |
1da177e4 | 2488 | } |
1da177e4 | 2489 | } |
393d2cc3 | 2490 | spin_unlock_irqrestore(&interfaces_lock,flags); |
1da177e4 | 2491 | |
393d2cc3 CM |
2492 | if (i == MAX_IPMI_INTERFACES) |
2493 | return -ENODEV; | |
1da177e4 | 2494 | |
393d2cc3 | 2495 | remove_proc_entries(intf); |
1da177e4 LT |
2496 | |
2497 | /* Call all the watcher interfaces to tell them that | |
2498 | an interface is gone. */ | |
2499 | down_read(&smi_watchers_sem); | |
393d2cc3 | 2500 | list_for_each_entry(w, &smi_watchers, link) |
1da177e4 | 2501 | w->smi_gone(i); |
1da177e4 | 2502 | up_read(&smi_watchers_sem); |
393d2cc3 CM |
2503 | |
2504 | /* Allow the entry to be reused now. */ | |
2505 | spin_lock_irqsave(&interfaces_lock, flags); | |
2506 | ipmi_interfaces[i] = NULL; | |
2507 | spin_unlock_irqrestore(&interfaces_lock,flags); | |
2508 | ||
2509 | kref_put(&intf->refcount, intf_free); | |
1da177e4 LT |
2510 | return 0; |
2511 | } | |
2512 | ||
2513 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
2514 | struct ipmi_smi_msg *msg) | |
2515 | { | |
2516 | struct ipmi_ipmb_addr ipmb_addr; | |
2517 | struct ipmi_recv_msg *recv_msg; | |
2518 | unsigned long flags; | |
2519 | ||
2520 | ||
2521 | /* This is 11, not 10, because the response must contain a | |
2522 | * completion code. */ | |
2523 | if (msg->rsp_size < 11) { | |
2524 | /* Message not big enough, just ignore it. */ | |
2525 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2526 | intf->invalid_ipmb_responses++; | |
2527 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | if (msg->rsp[2] != 0) { | |
2532 | /* An error getting the response, just ignore it. */ | |
2533 | return 0; | |
2534 | } | |
2535 | ||
2536 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
2537 | ipmb_addr.slave_addr = msg->rsp[6]; | |
2538 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
2539 | ipmb_addr.lun = msg->rsp[7] & 3; | |
2540 | ||
2541 | /* It's a response from a remote entity. Look up the sequence | |
2542 | number and handle the response. */ | |
2543 | if (intf_find_seq(intf, | |
2544 | msg->rsp[7] >> 2, | |
2545 | msg->rsp[3] & 0x0f, | |
2546 | msg->rsp[8], | |
2547 | (msg->rsp[4] >> 2) & (~1), | |
2548 | (struct ipmi_addr *) &(ipmb_addr), | |
2549 | &recv_msg)) | |
2550 | { | |
2551 | /* We were unable to find the sequence number, | |
2552 | so just nuke the message. */ | |
2553 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2554 | intf->unhandled_ipmb_responses++; | |
2555 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2556 | return 0; | |
2557 | } | |
2558 | ||
2559 | memcpy(recv_msg->msg_data, | |
2560 | &(msg->rsp[9]), | |
2561 | msg->rsp_size - 9); | |
2562 | /* THe other fields matched, so no need to set them, except | |
2563 | for netfn, which needs to be the response that was | |
2564 | returned, not the request value. */ | |
2565 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
2566 | recv_msg->msg.data = recv_msg->msg_data; | |
2567 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
2568 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2569 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2570 | intf->handled_ipmb_responses++; | |
2571 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2572 | deliver_response(recv_msg); | |
2573 | ||
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
2578 | struct ipmi_smi_msg *msg) | |
2579 | { | |
393d2cc3 CM |
2580 | struct cmd_rcvr *rcvr; |
2581 | int rv = 0; | |
2582 | unsigned char netfn; | |
2583 | unsigned char cmd; | |
c69c3127 | 2584 | unsigned char chan; |
393d2cc3 CM |
2585 | ipmi_user_t user = NULL; |
2586 | struct ipmi_ipmb_addr *ipmb_addr; | |
2587 | struct ipmi_recv_msg *recv_msg; | |
2588 | unsigned long flags; | |
1da177e4 LT |
2589 | |
2590 | if (msg->rsp_size < 10) { | |
2591 | /* Message not big enough, just ignore it. */ | |
2592 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2593 | intf->invalid_commands++; | |
2594 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2595 | return 0; | |
2596 | } | |
2597 | ||
2598 | if (msg->rsp[2] != 0) { | |
2599 | /* An error getting the response, just ignore it. */ | |
2600 | return 0; | |
2601 | } | |
2602 | ||
2603 | netfn = msg->rsp[4] >> 2; | |
2604 | cmd = msg->rsp[8]; | |
c69c3127 | 2605 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 2606 | |
e61fb5b6 | 2607 | rcu_read_lock(); |
c69c3127 | 2608 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
2609 | if (rcvr) { |
2610 | user = rcvr->user; | |
2611 | kref_get(&user->refcount); | |
2612 | } else | |
2613 | user = NULL; | |
e61fb5b6 | 2614 | rcu_read_unlock(); |
1da177e4 LT |
2615 | |
2616 | if (user == NULL) { | |
2617 | /* We didn't find a user, deliver an error response. */ | |
2618 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2619 | intf->unhandled_commands++; | |
2620 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2621 | ||
2622 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
2623 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
2624 | msg->data[2] = msg->rsp[3]; | |
2625 | msg->data[3] = msg->rsp[6]; | |
2626 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); | |
2627 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); | |
c14979b9 | 2628 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
1da177e4 LT |
2629 | /* rqseq/lun */ |
2630 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
2631 | msg->data[8] = msg->rsp[8]; /* cmd */ | |
2632 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
2633 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
2634 | msg->data_size = 11; | |
2635 | ||
2636 | #ifdef DEBUG_MSGING | |
2637 | { | |
2638 | int m; | |
2639 | printk("Invalid command:"); | |
e8b33617 | 2640 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
2641 | printk(" %2.2x", msg->data[m]); |
2642 | printk("\n"); | |
2643 | } | |
2644 | #endif | |
2645 | intf->handlers->sender(intf->send_info, msg, 0); | |
2646 | ||
2647 | rv = -1; /* We used the message, so return the value that | |
2648 | causes it to not be freed or queued. */ | |
2649 | } else { | |
2650 | /* Deliver the message to the user. */ | |
2651 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2652 | intf->handled_commands++; | |
2653 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2654 | ||
2655 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 2656 | if (!recv_msg) { |
1da177e4 LT |
2657 | /* We couldn't allocate memory for the |
2658 | message, so requeue it for handling | |
2659 | later. */ | |
2660 | rv = 1; | |
393d2cc3 | 2661 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
2662 | } else { |
2663 | /* Extract the source address from the data. */ | |
2664 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
2665 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
2666 | ipmb_addr->slave_addr = msg->rsp[6]; | |
2667 | ipmb_addr->lun = msg->rsp[7] & 3; | |
2668 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
2669 | ||
2670 | /* Extract the rest of the message information | |
2671 | from the IPMB header.*/ | |
2672 | recv_msg->user = user; | |
2673 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
2674 | recv_msg->msgid = msg->rsp[7] >> 2; | |
2675 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
2676 | recv_msg->msg.cmd = msg->rsp[8]; | |
2677 | recv_msg->msg.data = recv_msg->msg_data; | |
2678 | ||
2679 | /* We chop off 10, not 9 bytes because the checksum | |
2680 | at the end also needs to be removed. */ | |
2681 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
2682 | memcpy(recv_msg->msg_data, | |
2683 | &(msg->rsp[9]), | |
2684 | msg->rsp_size - 10); | |
2685 | deliver_response(recv_msg); | |
2686 | } | |
2687 | } | |
2688 | ||
2689 | return rv; | |
2690 | } | |
2691 | ||
2692 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
2693 | struct ipmi_smi_msg *msg) | |
2694 | { | |
2695 | struct ipmi_lan_addr lan_addr; | |
2696 | struct ipmi_recv_msg *recv_msg; | |
2697 | unsigned long flags; | |
2698 | ||
2699 | ||
2700 | /* This is 13, not 12, because the response must contain a | |
2701 | * completion code. */ | |
2702 | if (msg->rsp_size < 13) { | |
2703 | /* Message not big enough, just ignore it. */ | |
2704 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2705 | intf->invalid_lan_responses++; | |
2706 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2707 | return 0; | |
2708 | } | |
2709 | ||
2710 | if (msg->rsp[2] != 0) { | |
2711 | /* An error getting the response, just ignore it. */ | |
2712 | return 0; | |
2713 | } | |
2714 | ||
2715 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
2716 | lan_addr.session_handle = msg->rsp[4]; | |
2717 | lan_addr.remote_SWID = msg->rsp[8]; | |
2718 | lan_addr.local_SWID = msg->rsp[5]; | |
2719 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
2720 | lan_addr.privilege = msg->rsp[3] >> 4; | |
2721 | lan_addr.lun = msg->rsp[9] & 3; | |
2722 | ||
2723 | /* It's a response from a remote entity. Look up the sequence | |
2724 | number and handle the response. */ | |
2725 | if (intf_find_seq(intf, | |
2726 | msg->rsp[9] >> 2, | |
2727 | msg->rsp[3] & 0x0f, | |
2728 | msg->rsp[10], | |
2729 | (msg->rsp[6] >> 2) & (~1), | |
2730 | (struct ipmi_addr *) &(lan_addr), | |
2731 | &recv_msg)) | |
2732 | { | |
2733 | /* We were unable to find the sequence number, | |
2734 | so just nuke the message. */ | |
2735 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2736 | intf->unhandled_lan_responses++; | |
2737 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2738 | return 0; | |
2739 | } | |
2740 | ||
2741 | memcpy(recv_msg->msg_data, | |
2742 | &(msg->rsp[11]), | |
2743 | msg->rsp_size - 11); | |
2744 | /* The other fields matched, so no need to set them, except | |
2745 | for netfn, which needs to be the response that was | |
2746 | returned, not the request value. */ | |
2747 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
2748 | recv_msg->msg.data = recv_msg->msg_data; | |
2749 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
2750 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2751 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2752 | intf->handled_lan_responses++; | |
2753 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2754 | deliver_response(recv_msg); | |
2755 | ||
2756 | return 0; | |
2757 | } | |
2758 | ||
2759 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
2760 | struct ipmi_smi_msg *msg) | |
2761 | { | |
393d2cc3 CM |
2762 | struct cmd_rcvr *rcvr; |
2763 | int rv = 0; | |
2764 | unsigned char netfn; | |
2765 | unsigned char cmd; | |
c69c3127 | 2766 | unsigned char chan; |
393d2cc3 CM |
2767 | ipmi_user_t user = NULL; |
2768 | struct ipmi_lan_addr *lan_addr; | |
2769 | struct ipmi_recv_msg *recv_msg; | |
2770 | unsigned long flags; | |
1da177e4 LT |
2771 | |
2772 | if (msg->rsp_size < 12) { | |
2773 | /* Message not big enough, just ignore it. */ | |
2774 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2775 | intf->invalid_commands++; | |
2776 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | if (msg->rsp[2] != 0) { | |
2781 | /* An error getting the response, just ignore it. */ | |
2782 | return 0; | |
2783 | } | |
2784 | ||
2785 | netfn = msg->rsp[6] >> 2; | |
2786 | cmd = msg->rsp[10]; | |
c69c3127 | 2787 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 2788 | |
e61fb5b6 | 2789 | rcu_read_lock(); |
c69c3127 | 2790 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
2791 | if (rcvr) { |
2792 | user = rcvr->user; | |
2793 | kref_get(&user->refcount); | |
2794 | } else | |
2795 | user = NULL; | |
e61fb5b6 | 2796 | rcu_read_unlock(); |
1da177e4 LT |
2797 | |
2798 | if (user == NULL) { | |
393d2cc3 | 2799 | /* We didn't find a user, just give up. */ |
1da177e4 LT |
2800 | spin_lock_irqsave(&intf->counter_lock, flags); |
2801 | intf->unhandled_commands++; | |
2802 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2803 | ||
2804 | rv = 0; /* Don't do anything with these messages, just | |
2805 | allow them to be freed. */ | |
2806 | } else { | |
2807 | /* Deliver the message to the user. */ | |
2808 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2809 | intf->handled_commands++; | |
2810 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2811 | ||
2812 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 2813 | if (!recv_msg) { |
1da177e4 LT |
2814 | /* We couldn't allocate memory for the |
2815 | message, so requeue it for handling | |
2816 | later. */ | |
2817 | rv = 1; | |
393d2cc3 | 2818 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
2819 | } else { |
2820 | /* Extract the source address from the data. */ | |
2821 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
2822 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
2823 | lan_addr->session_handle = msg->rsp[4]; | |
2824 | lan_addr->remote_SWID = msg->rsp[8]; | |
2825 | lan_addr->local_SWID = msg->rsp[5]; | |
2826 | lan_addr->lun = msg->rsp[9] & 3; | |
2827 | lan_addr->channel = msg->rsp[3] & 0xf; | |
2828 | lan_addr->privilege = msg->rsp[3] >> 4; | |
2829 | ||
2830 | /* Extract the rest of the message information | |
2831 | from the IPMB header.*/ | |
2832 | recv_msg->user = user; | |
2833 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
2834 | recv_msg->msgid = msg->rsp[9] >> 2; | |
2835 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
2836 | recv_msg->msg.cmd = msg->rsp[10]; | |
2837 | recv_msg->msg.data = recv_msg->msg_data; | |
2838 | ||
2839 | /* We chop off 12, not 11 bytes because the checksum | |
2840 | at the end also needs to be removed. */ | |
2841 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
2842 | memcpy(recv_msg->msg_data, | |
2843 | &(msg->rsp[11]), | |
2844 | msg->rsp_size - 12); | |
2845 | deliver_response(recv_msg); | |
2846 | } | |
2847 | } | |
2848 | ||
2849 | return rv; | |
2850 | } | |
2851 | ||
2852 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, | |
2853 | struct ipmi_smi_msg *msg) | |
2854 | { | |
2855 | struct ipmi_system_interface_addr *smi_addr; | |
2856 | ||
2857 | recv_msg->msgid = 0; | |
2858 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
2859 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2860 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
2861 | smi_addr->lun = msg->rsp[0] & 3; | |
2862 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
2863 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
2864 | recv_msg->msg.cmd = msg->rsp[1]; | |
2865 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
2866 | recv_msg->msg.data = recv_msg->msg_data; | |
2867 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
2868 | } | |
2869 | ||
1da177e4 LT |
2870 | static int handle_read_event_rsp(ipmi_smi_t intf, |
2871 | struct ipmi_smi_msg *msg) | |
2872 | { | |
2873 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
2874 | struct list_head msgs; | |
2875 | ipmi_user_t user; | |
2876 | int rv = 0; | |
2877 | int deliver_count = 0; | |
2878 | unsigned long flags; | |
2879 | ||
2880 | if (msg->rsp_size < 19) { | |
2881 | /* Message is too small to be an IPMB event. */ | |
2882 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2883 | intf->invalid_events++; | |
2884 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2885 | return 0; | |
2886 | } | |
2887 | ||
2888 | if (msg->rsp[2] != 0) { | |
2889 | /* An error getting the event, just ignore it. */ | |
2890 | return 0; | |
2891 | } | |
2892 | ||
2893 | INIT_LIST_HEAD(&msgs); | |
2894 | ||
393d2cc3 | 2895 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 LT |
2896 | |
2897 | spin_lock(&intf->counter_lock); | |
2898 | intf->events++; | |
2899 | spin_unlock(&intf->counter_lock); | |
2900 | ||
2901 | /* Allocate and fill in one message for every user that is getting | |
2902 | events. */ | |
393d2cc3 CM |
2903 | rcu_read_lock(); |
2904 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 2905 | if (!user->gets_events) |
1da177e4 LT |
2906 | continue; |
2907 | ||
2908 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 2909 | if (!recv_msg) { |
393d2cc3 | 2910 | rcu_read_unlock(); |
8a3628d5 CM |
2911 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
2912 | link) { | |
1da177e4 LT |
2913 | list_del(&recv_msg->link); |
2914 | ipmi_free_recv_msg(recv_msg); | |
2915 | } | |
2916 | /* We couldn't allocate memory for the | |
2917 | message, so requeue it for handling | |
2918 | later. */ | |
2919 | rv = 1; | |
2920 | goto out; | |
2921 | } | |
2922 | ||
2923 | deliver_count++; | |
2924 | ||
2925 | copy_event_into_recv_msg(recv_msg, msg); | |
2926 | recv_msg->user = user; | |
393d2cc3 | 2927 | kref_get(&user->refcount); |
1da177e4 LT |
2928 | list_add_tail(&(recv_msg->link), &msgs); |
2929 | } | |
393d2cc3 | 2930 | rcu_read_unlock(); |
1da177e4 LT |
2931 | |
2932 | if (deliver_count) { | |
2933 | /* Now deliver all the messages. */ | |
2934 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
2935 | list_del(&recv_msg->link); | |
2936 | deliver_response(recv_msg); | |
2937 | } | |
2938 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
2939 | /* No one to receive the message, put it in queue if there's | |
2940 | not already too many things in the queue. */ | |
2941 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 2942 | if (!recv_msg) { |
1da177e4 LT |
2943 | /* We couldn't allocate memory for the |
2944 | message, so requeue it for handling | |
2945 | later. */ | |
2946 | rv = 1; | |
2947 | goto out; | |
2948 | } | |
2949 | ||
2950 | copy_event_into_recv_msg(recv_msg, msg); | |
2951 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 2952 | intf->waiting_events_count++; |
1da177e4 LT |
2953 | } else { |
2954 | /* There's too many things in the queue, discard this | |
2955 | message. */ | |
2956 | printk(KERN_WARNING PFX "Event queue full, discarding an" | |
2957 | " incoming event\n"); | |
2958 | } | |
2959 | ||
2960 | out: | |
2961 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
2962 | ||
2963 | return rv; | |
2964 | } | |
2965 | ||
2966 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
2967 | struct ipmi_smi_msg *msg) | |
2968 | { | |
2969 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 2970 | unsigned long flags; |
393d2cc3 | 2971 | struct ipmi_user *user; |
1da177e4 LT |
2972 | |
2973 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
56a55ec6 CM |
2974 | if (recv_msg == NULL) |
2975 | { | |
2976 | printk(KERN_WARNING"IPMI message received with no owner. This\n" | |
2977 | "could be because of a malformed message, or\n" | |
2978 | "because of a hardware error. Contact your\n" | |
2979 | "hardware vender for assistance\n"); | |
2980 | return 0; | |
2981 | } | |
1da177e4 | 2982 | |
393d2cc3 | 2983 | user = recv_msg->user; |
1da177e4 | 2984 | /* Make sure the user still exists. */ |
393d2cc3 | 2985 | if (user && !user->valid) { |
56a55ec6 CM |
2986 | /* The user for the message went away, so give up. */ |
2987 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2988 | intf->unhandled_local_responses++; | |
2989 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
1da177e4 LT |
2990 | ipmi_free_recv_msg(recv_msg); |
2991 | } else { | |
2992 | struct ipmi_system_interface_addr *smi_addr; | |
2993 | ||
2994 | spin_lock_irqsave(&intf->counter_lock, flags); | |
2995 | intf->handled_local_responses++; | |
2996 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
2997 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
2998 | recv_msg->msgid = msg->msgid; | |
2999 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3000 | &(recv_msg->addr)); | |
3001 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3002 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3003 | smi_addr->lun = msg->rsp[0] & 3; | |
3004 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3005 | recv_msg->msg.cmd = msg->rsp[1]; | |
3006 | memcpy(recv_msg->msg_data, | |
3007 | &(msg->rsp[2]), | |
3008 | msg->rsp_size - 2); | |
3009 | recv_msg->msg.data = recv_msg->msg_data; | |
3010 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3011 | deliver_response(recv_msg); | |
3012 | } | |
3013 | ||
3014 | return 0; | |
3015 | } | |
3016 | ||
3017 | /* Handle a new message. Return 1 if the message should be requeued, | |
3018 | 0 if the message should be freed, or -1 if the message should not | |
3019 | be freed or requeued. */ | |
3020 | static int handle_new_recv_msg(ipmi_smi_t intf, | |
3021 | struct ipmi_smi_msg *msg) | |
3022 | { | |
3023 | int requeue; | |
3024 | int chan; | |
3025 | ||
3026 | #ifdef DEBUG_MSGING | |
3027 | int m; | |
3028 | printk("Recv:"); | |
e8b33617 | 3029 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3030 | printk(" %2.2x", msg->rsp[m]); |
3031 | printk("\n"); | |
3032 | #endif | |
3033 | if (msg->rsp_size < 2) { | |
3034 | /* Message is too small to be correct. */ | |
3035 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3036 | " for netfn %x cmd %x, got %d bytes\n", | |
3037 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3038 | ||
3039 | /* Generate an error response for the message. */ | |
3040 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3041 | msg->rsp[1] = msg->data[1]; | |
3042 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3043 | msg->rsp_size = 3; | |
3044 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))/* Netfn */ | |
3045 | || (msg->rsp[1] != msg->data[1])) /* Command */ | |
3046 | { | |
3047 | /* The response is not even marginally correct. */ | |
3048 | printk(KERN_WARNING PFX "BMC returned incorrect response," | |
3049 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3050 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3051 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3052 | ||
3053 | /* Generate an error response for the message. */ | |
3054 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3055 | msg->rsp[1] = msg->data[1]; | |
3056 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3057 | msg->rsp_size = 3; | |
3058 | } | |
3059 | ||
3060 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3061 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
3062 | && (msg->user_data != NULL)) | |
3063 | { | |
3064 | /* It's a response to a response we sent. For this we | |
3065 | deliver a send message response to the user. */ | |
393d2cc3 | 3066 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3067 | |
3068 | requeue = 0; | |
3069 | if (msg->rsp_size < 2) | |
3070 | /* Message is too small to be correct. */ | |
3071 | goto out; | |
3072 | ||
3073 | chan = msg->data[2] & 0x0f; | |
3074 | if (chan >= IPMI_MAX_CHANNELS) | |
3075 | /* Invalid channel number */ | |
3076 | goto out; | |
3077 | ||
393d2cc3 CM |
3078 | if (!recv_msg) |
3079 | goto out; | |
3080 | ||
3081 | /* Make sure the user still exists. */ | |
3082 | if (!recv_msg->user || !recv_msg->user->valid) | |
3083 | goto out; | |
3084 | ||
3085 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3086 | recv_msg->msg.data = recv_msg->msg_data; | |
3087 | recv_msg->msg.data_len = 1; | |
3088 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3089 | deliver_response(recv_msg); | |
1da177e4 LT |
3090 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
3091 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) | |
3092 | { | |
3093 | /* It's from the receive queue. */ | |
3094 | chan = msg->rsp[3] & 0xf; | |
3095 | if (chan >= IPMI_MAX_CHANNELS) { | |
3096 | /* Invalid channel number */ | |
3097 | requeue = 0; | |
3098 | goto out; | |
3099 | } | |
3100 | ||
3101 | switch (intf->channels[chan].medium) { | |
3102 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3103 | if (msg->rsp[4] & 0x04) { | |
3104 | /* It's a response, so find the | |
3105 | requesting message and send it up. */ | |
3106 | requeue = handle_ipmb_get_msg_rsp(intf, msg); | |
3107 | } else { | |
3108 | /* It's a command to the SMS from some other | |
3109 | entity. Handle that. */ | |
3110 | requeue = handle_ipmb_get_msg_cmd(intf, msg); | |
3111 | } | |
3112 | break; | |
3113 | ||
3114 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3115 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3116 | if (msg->rsp[6] & 0x04) { | |
3117 | /* It's a response, so find the | |
3118 | requesting message and send it up. */ | |
3119 | requeue = handle_lan_get_msg_rsp(intf, msg); | |
3120 | } else { | |
3121 | /* It's a command to the SMS from some other | |
3122 | entity. Handle that. */ | |
3123 | requeue = handle_lan_get_msg_cmd(intf, msg); | |
3124 | } | |
3125 | break; | |
3126 | ||
3127 | default: | |
3128 | /* We don't handle the channel type, so just | |
3129 | * free the message. */ | |
3130 | requeue = 0; | |
3131 | } | |
3132 | ||
3133 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3134 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) | |
3135 | { | |
3136 | /* It's an asyncronous event. */ | |
3137 | requeue = handle_read_event_rsp(intf, msg); | |
3138 | } else { | |
3139 | /* It's a response from the local BMC. */ | |
3140 | requeue = handle_bmc_rsp(intf, msg); | |
3141 | } | |
3142 | ||
3143 | out: | |
3144 | return requeue; | |
3145 | } | |
3146 | ||
3147 | /* Handle a new message from the lower layer. */ | |
3148 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3149 | struct ipmi_smi_msg *msg) | |
3150 | { | |
3151 | unsigned long flags; | |
3152 | int rv; | |
3153 | ||
3154 | ||
1da177e4 LT |
3155 | if ((msg->data_size >= 2) |
3156 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3157 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
393d2cc3 CM |
3158 | && (msg->user_data == NULL)) |
3159 | { | |
1da177e4 LT |
3160 | /* This is the local response to a command send, start |
3161 | the timer for these. The user_data will not be | |
3162 | NULL if this is a response send, and we will let | |
3163 | response sends just go through. */ | |
3164 | ||
3165 | /* Check for errors, if we get certain errors (ones | |
3166 | that mean basically we can try again later), we | |
3167 | ignore them and start the timer. Otherwise we | |
3168 | report the error immediately. */ | |
3169 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) | |
3170 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
3171 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)) | |
3172 | { | |
3173 | int chan = msg->rsp[3] & 0xf; | |
3174 | ||
3175 | /* Got an error sending the message, handle it. */ | |
3176 | spin_lock_irqsave(&intf->counter_lock, flags); | |
3177 | if (chan >= IPMI_MAX_CHANNELS) | |
3178 | ; /* This shouldn't happen */ | |
3179 | else if ((intf->channels[chan].medium | |
3180 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3181 | || (intf->channels[chan].medium | |
3182 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
3183 | intf->sent_lan_command_errs++; | |
3184 | else | |
3185 | intf->sent_ipmb_command_errs++; | |
3186 | spin_unlock_irqrestore(&intf->counter_lock, flags); | |
3187 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); | |
3188 | } else { | |
3189 | /* The message was sent, start the timer. */ | |
3190 | intf_start_seq_timer(intf, msg->msgid); | |
3191 | } | |
3192 | ||
3193 | ipmi_free_smi_msg(msg); | |
393d2cc3 | 3194 | goto out; |
1da177e4 LT |
3195 | } |
3196 | ||
3197 | /* To preserve message order, if the list is not empty, we | |
3198 | tack this message onto the end of the list. */ | |
393d2cc3 CM |
3199 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); |
3200 | if (!list_empty(&intf->waiting_msgs)) { | |
3201 | list_add_tail(&msg->link, &intf->waiting_msgs); | |
177294d1 | 3202 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
393d2cc3 | 3203 | goto out; |
1da177e4 | 3204 | } |
393d2cc3 | 3205 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
1da177e4 LT |
3206 | |
3207 | rv = handle_new_recv_msg(intf, msg); | |
3208 | if (rv > 0) { | |
3209 | /* Could not handle the message now, just add it to a | |
3210 | list to handle later. */ | |
177294d1 | 3211 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); |
393d2cc3 | 3212 | list_add_tail(&msg->link, &intf->waiting_msgs); |
177294d1 | 3213 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
1da177e4 LT |
3214 | } else if (rv == 0) { |
3215 | ipmi_free_smi_msg(msg); | |
3216 | } | |
3217 | ||
393d2cc3 CM |
3218 | out: |
3219 | return; | |
1da177e4 LT |
3220 | } |
3221 | ||
3222 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3223 | { | |
3224 | ipmi_user_t user; | |
3225 | ||
393d2cc3 CM |
3226 | rcu_read_lock(); |
3227 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3228 | if (!user->handler->ipmi_watchdog_pretimeout) |
1da177e4 LT |
3229 | continue; |
3230 | ||
3231 | user->handler->ipmi_watchdog_pretimeout(user->handler_data); | |
3232 | } | |
393d2cc3 | 3233 | rcu_read_unlock(); |
1da177e4 LT |
3234 | } |
3235 | ||
3236 | static void | |
3237 | handle_msg_timeout(struct ipmi_recv_msg *msg) | |
3238 | { | |
3239 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
3240 | msg->msg_data[0] = IPMI_TIMEOUT_COMPLETION_CODE; | |
3241 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
3242 | msg->msg.data_len = 1; | |
3243 | msg->msg.data = msg->msg_data; | |
3244 | deliver_response(msg); | |
3245 | } | |
3246 | ||
882fe011 CM |
3247 | static struct ipmi_smi_msg * |
3248 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
3249 | unsigned char seq, long seqid) | |
1da177e4 | 3250 | { |
882fe011 | 3251 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 LT |
3252 | if (!smi_msg) |
3253 | /* If we can't allocate the message, then just return, we | |
3254 | get 4 retries, so this should be ok. */ | |
882fe011 | 3255 | return NULL; |
1da177e4 LT |
3256 | |
3257 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
3258 | smi_msg->data_size = recv_msg->msg.data_len; | |
3259 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
3260 | ||
1da177e4 LT |
3261 | #ifdef DEBUG_MSGING |
3262 | { | |
3263 | int m; | |
3264 | printk("Resend: "); | |
e8b33617 | 3265 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
3266 | printk(" %2.2x", smi_msg->data[m]); |
3267 | printk("\n"); | |
3268 | } | |
3269 | #endif | |
882fe011 | 3270 | return smi_msg; |
1da177e4 LT |
3271 | } |
3272 | ||
393d2cc3 CM |
3273 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
3274 | struct list_head *timeouts, long timeout_period, | |
3275 | int slot, unsigned long *flags) | |
3276 | { | |
3277 | struct ipmi_recv_msg *msg; | |
3278 | ||
3279 | if (!ent->inuse) | |
3280 | return; | |
3281 | ||
3282 | ent->timeout -= timeout_period; | |
3283 | if (ent->timeout > 0) | |
3284 | return; | |
3285 | ||
3286 | if (ent->retries_left == 0) { | |
3287 | /* The message has used all its retries. */ | |
3288 | ent->inuse = 0; | |
3289 | msg = ent->recv_msg; | |
3290 | list_add_tail(&msg->link, timeouts); | |
3291 | spin_lock(&intf->counter_lock); | |
3292 | if (ent->broadcast) | |
3293 | intf->timed_out_ipmb_broadcasts++; | |
3294 | else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) | |
3295 | intf->timed_out_lan_commands++; | |
3296 | else | |
3297 | intf->timed_out_ipmb_commands++; | |
3298 | spin_unlock(&intf->counter_lock); | |
3299 | } else { | |
3300 | struct ipmi_smi_msg *smi_msg; | |
3301 | /* More retries, send again. */ | |
3302 | ||
3303 | /* Start with the max timer, set to normal | |
3304 | timer after the message is sent. */ | |
3305 | ent->timeout = MAX_MSG_TIMEOUT; | |
3306 | ent->retries_left--; | |
3307 | spin_lock(&intf->counter_lock); | |
3308 | if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) | |
3309 | intf->retransmitted_lan_commands++; | |
3310 | else | |
3311 | intf->retransmitted_ipmb_commands++; | |
3312 | spin_unlock(&intf->counter_lock); | |
3313 | ||
3314 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, | |
3315 | ent->seqid); | |
8a3628d5 | 3316 | if (!smi_msg) |
393d2cc3 CM |
3317 | return; |
3318 | ||
3319 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
3320 | /* Send the new message. We send with a zero | |
3321 | * priority. It timed out, I doubt time is | |
3322 | * that critical now, and high priority | |
3323 | * messages are really only for messages to the | |
3324 | * local MC, which don't get resent. */ | |
3325 | intf->handlers->sender(intf->send_info, | |
3326 | smi_msg, 0); | |
3327 | spin_lock_irqsave(&intf->seq_lock, *flags); | |
3328 | } | |
3329 | } | |
3330 | ||
3331 | static void ipmi_timeout_handler(long timeout_period) | |
1da177e4 LT |
3332 | { |
3333 | ipmi_smi_t intf; | |
3334 | struct list_head timeouts; | |
3335 | struct ipmi_recv_msg *msg, *msg2; | |
3336 | struct ipmi_smi_msg *smi_msg, *smi_msg2; | |
3337 | unsigned long flags; | |
3338 | int i, j; | |
3339 | ||
3340 | INIT_LIST_HEAD(&timeouts); | |
3341 | ||
3342 | spin_lock(&interfaces_lock); | |
e8b33617 | 3343 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 | 3344 | intf = ipmi_interfaces[i]; |
393d2cc3 | 3345 | if (IPMI_INVALID_INTERFACE(intf)) |
1da177e4 | 3346 | continue; |
393d2cc3 CM |
3347 | kref_get(&intf->refcount); |
3348 | spin_unlock(&interfaces_lock); | |
1da177e4 LT |
3349 | |
3350 | /* See if any waiting messages need to be processed. */ | |
393d2cc3 | 3351 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); |
8a3628d5 CM |
3352 | list_for_each_entry_safe(smi_msg, smi_msg2, |
3353 | &intf->waiting_msgs, link) { | |
3354 | if (!handle_new_recv_msg(intf, smi_msg)) { | |
1da177e4 LT |
3355 | list_del(&smi_msg->link); |
3356 | ipmi_free_smi_msg(smi_msg); | |
3357 | } else { | |
3358 | /* To preserve message order, quit if we | |
3359 | can't handle a message. */ | |
3360 | break; | |
3361 | } | |
3362 | } | |
393d2cc3 | 3363 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
1da177e4 LT |
3364 | |
3365 | /* Go through the seq table and find any messages that | |
3366 | have timed out, putting them in the timeouts | |
3367 | list. */ | |
393d2cc3 CM |
3368 | spin_lock_irqsave(&intf->seq_lock, flags); |
3369 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) | |
3370 | check_msg_timeout(intf, &(intf->seq_table[j]), | |
3371 | &timeouts, timeout_period, j, | |
3372 | &flags); | |
3373 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
3374 | ||
3375 | list_for_each_entry_safe(msg, msg2, &timeouts, link) | |
1da177e4 | 3376 | handle_msg_timeout(msg); |
1da177e4 | 3377 | |
393d2cc3 CM |
3378 | kref_put(&intf->refcount, intf_free); |
3379 | spin_lock(&interfaces_lock); | |
1da177e4 LT |
3380 | } |
3381 | spin_unlock(&interfaces_lock); | |
3382 | } | |
3383 | ||
3384 | static void ipmi_request_event(void) | |
3385 | { | |
3386 | ipmi_smi_t intf; | |
3387 | int i; | |
3388 | ||
3389 | spin_lock(&interfaces_lock); | |
e8b33617 | 3390 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 | 3391 | intf = ipmi_interfaces[i]; |
393d2cc3 | 3392 | if (IPMI_INVALID_INTERFACE(intf)) |
1da177e4 LT |
3393 | continue; |
3394 | ||
3395 | intf->handlers->request_events(intf->send_info); | |
3396 | } | |
3397 | spin_unlock(&interfaces_lock); | |
3398 | } | |
3399 | ||
3400 | static struct timer_list ipmi_timer; | |
3401 | ||
3402 | /* Call every ~100 ms. */ | |
3403 | #define IPMI_TIMEOUT_TIME 100 | |
3404 | ||
3405 | /* How many jiffies does it take to get to the timeout time. */ | |
3406 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
3407 | ||
3408 | /* Request events from the queue every second (this is the number of | |
3409 | IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
3410 | future, IPMI will add a way to know immediately if an event is in | |
3411 | the queue and this silliness can go away. */ | |
3412 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
3413 | ||
8f43f84f | 3414 | static atomic_t stop_operation; |
1da177e4 LT |
3415 | static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
3416 | ||
3417 | static void ipmi_timeout(unsigned long data) | |
3418 | { | |
8f43f84f | 3419 | if (atomic_read(&stop_operation)) |
1da177e4 | 3420 | return; |
1da177e4 LT |
3421 | |
3422 | ticks_to_req_ev--; | |
3423 | if (ticks_to_req_ev == 0) { | |
3424 | ipmi_request_event(); | |
3425 | ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
3426 | } | |
3427 | ||
3428 | ipmi_timeout_handler(IPMI_TIMEOUT_TIME); | |
3429 | ||
8f43f84f | 3430 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
1da177e4 LT |
3431 | } |
3432 | ||
3433 | ||
3434 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
3435 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
3436 | ||
3437 | /* FIXME - convert these to slabs. */ | |
3438 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
3439 | { | |
3440 | atomic_dec(&smi_msg_inuse_count); | |
3441 | kfree(msg); | |
3442 | } | |
3443 | ||
3444 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
3445 | { | |
3446 | struct ipmi_smi_msg *rv; | |
3447 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
3448 | if (rv) { | |
3449 | rv->done = free_smi_msg; | |
3450 | rv->user_data = NULL; | |
3451 | atomic_inc(&smi_msg_inuse_count); | |
3452 | } | |
3453 | return rv; | |
3454 | } | |
3455 | ||
3456 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
3457 | { | |
3458 | atomic_dec(&recv_msg_inuse_count); | |
3459 | kfree(msg); | |
3460 | } | |
3461 | ||
3462 | struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) | |
3463 | { | |
3464 | struct ipmi_recv_msg *rv; | |
3465 | ||
3466 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
3467 | if (rv) { | |
a9eec556 | 3468 | rv->user = NULL; |
1da177e4 LT |
3469 | rv->done = free_recv_msg; |
3470 | atomic_inc(&recv_msg_inuse_count); | |
3471 | } | |
3472 | return rv; | |
3473 | } | |
3474 | ||
393d2cc3 CM |
3475 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
3476 | { | |
3477 | if (msg->user) | |
3478 | kref_put(&msg->user->refcount, free_user); | |
3479 | msg->done(msg); | |
3480 | } | |
3481 | ||
1da177e4 LT |
3482 | #ifdef CONFIG_IPMI_PANIC_EVENT |
3483 | ||
3484 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) | |
3485 | { | |
3486 | } | |
3487 | ||
3488 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
3489 | { | |
3490 | } | |
3491 | ||
3492 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 3493 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3494 | { |
56a55ec6 CM |
3495 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3496 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
3497 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
3498 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) | |
1da177e4 LT |
3499 | { |
3500 | /* A get event receiver command, save it. */ | |
56a55ec6 CM |
3501 | intf->event_receiver = msg->msg.data[1]; |
3502 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
3503 | } |
3504 | } | |
3505 | ||
56a55ec6 | 3506 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3507 | { |
56a55ec6 CM |
3508 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3509 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
3510 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
3511 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) | |
1da177e4 LT |
3512 | { |
3513 | /* A get device id command, save if we are an event | |
3514 | receiver or generator. */ | |
56a55ec6 CM |
3515 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
3516 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
3517 | } |
3518 | } | |
3519 | #endif | |
3520 | ||
3521 | static void send_panic_events(char *str) | |
3522 | { | |
3523 | struct kernel_ipmi_msg msg; | |
3524 | ipmi_smi_t intf; | |
3525 | unsigned char data[16]; | |
3526 | int i; | |
3527 | struct ipmi_system_interface_addr *si; | |
3528 | struct ipmi_addr addr; | |
3529 | struct ipmi_smi_msg smi_msg; | |
3530 | struct ipmi_recv_msg recv_msg; | |
3531 | ||
3532 | si = (struct ipmi_system_interface_addr *) &addr; | |
3533 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3534 | si->channel = IPMI_BMC_CHANNEL; | |
3535 | si->lun = 0; | |
3536 | ||
3537 | /* Fill in an event telling that we have failed. */ | |
3538 | msg.netfn = 0x04; /* Sensor or Event. */ | |
3539 | msg.cmd = 2; /* Platform event command. */ | |
3540 | msg.data = data; | |
3541 | msg.data_len = 8; | |
cda315ab | 3542 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
3543 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
3544 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
3545 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
3546 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
3547 | ||
3548 | /* Put a few breadcrumbs in. Hopefully later we can add more things | |
3549 | to make the panic events more useful. */ | |
3550 | if (str) { | |
3551 | data[3] = str[0]; | |
3552 | data[6] = str[1]; | |
3553 | data[7] = str[2]; | |
3554 | } | |
3555 | ||
3556 | smi_msg.done = dummy_smi_done_handler; | |
3557 | recv_msg.done = dummy_recv_done_handler; | |
3558 | ||
3559 | /* For every registered interface, send the event. */ | |
e8b33617 | 3560 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 | 3561 | intf = ipmi_interfaces[i]; |
393d2cc3 | 3562 | if (IPMI_INVALID_INTERFACE(intf)) |
1da177e4 LT |
3563 | continue; |
3564 | ||
3565 | /* Send the event announcing the panic. */ | |
3566 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
3567 | i_ipmi_request(NULL, | |
3568 | intf, | |
3569 | &addr, | |
3570 | 0, | |
3571 | &msg, | |
56a55ec6 | 3572 | intf, |
1da177e4 LT |
3573 | &smi_msg, |
3574 | &recv_msg, | |
3575 | 0, | |
c14979b9 CM |
3576 | intf->channels[0].address, |
3577 | intf->channels[0].lun, | |
1da177e4 LT |
3578 | 0, 1); /* Don't retry, and don't wait. */ |
3579 | } | |
3580 | ||
3581 | #ifdef CONFIG_IPMI_PANIC_STRING | |
3582 | /* On every interface, dump a bunch of OEM event holding the | |
3583 | string. */ | |
3584 | if (!str) | |
3585 | return; | |
3586 | ||
e8b33617 | 3587 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 LT |
3588 | char *p = str; |
3589 | struct ipmi_ipmb_addr *ipmb; | |
3590 | int j; | |
3591 | ||
3592 | intf = ipmi_interfaces[i]; | |
393d2cc3 | 3593 | if (IPMI_INVALID_INTERFACE(intf)) |
1da177e4 LT |
3594 | continue; |
3595 | ||
3596 | /* First job here is to figure out where to send the | |
3597 | OEM events. There's no way in IPMI to send OEM | |
3598 | events using an event send command, so we have to | |
3599 | find the SEL to put them in and stick them in | |
3600 | there. */ | |
3601 | ||
3602 | /* Get capabilities from the get device id. */ | |
3603 | intf->local_sel_device = 0; | |
3604 | intf->local_event_generator = 0; | |
3605 | intf->event_receiver = 0; | |
3606 | ||
3607 | /* Request the device info from the local MC. */ | |
3608 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
3609 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
3610 | msg.data = NULL; | |
3611 | msg.data_len = 0; | |
3612 | intf->null_user_handler = device_id_fetcher; | |
3613 | i_ipmi_request(NULL, | |
3614 | intf, | |
3615 | &addr, | |
3616 | 0, | |
3617 | &msg, | |
56a55ec6 | 3618 | intf, |
1da177e4 LT |
3619 | &smi_msg, |
3620 | &recv_msg, | |
3621 | 0, | |
c14979b9 CM |
3622 | intf->channels[0].address, |
3623 | intf->channels[0].lun, | |
1da177e4 LT |
3624 | 0, 1); /* Don't retry, and don't wait. */ |
3625 | ||
3626 | if (intf->local_event_generator) { | |
3627 | /* Request the event receiver from the local MC. */ | |
3628 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
3629 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
3630 | msg.data = NULL; | |
3631 | msg.data_len = 0; | |
3632 | intf->null_user_handler = event_receiver_fetcher; | |
3633 | i_ipmi_request(NULL, | |
3634 | intf, | |
3635 | &addr, | |
3636 | 0, | |
3637 | &msg, | |
56a55ec6 | 3638 | intf, |
1da177e4 LT |
3639 | &smi_msg, |
3640 | &recv_msg, | |
3641 | 0, | |
c14979b9 CM |
3642 | intf->channels[0].address, |
3643 | intf->channels[0].lun, | |
1da177e4 LT |
3644 | 0, 1); /* no retry, and no wait. */ |
3645 | } | |
3646 | intf->null_user_handler = NULL; | |
3647 | ||
3648 | /* Validate the event receiver. The low bit must not | |
3649 | be 1 (it must be a valid IPMB address), it cannot | |
3650 | be zero, and it must not be my address. */ | |
3651 | if (((intf->event_receiver & 1) == 0) | |
3652 | && (intf->event_receiver != 0) | |
c14979b9 | 3653 | && (intf->event_receiver != intf->channels[0].address)) |
1da177e4 LT |
3654 | { |
3655 | /* The event receiver is valid, send an IPMB | |
3656 | message. */ | |
3657 | ipmb = (struct ipmi_ipmb_addr *) &addr; | |
3658 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3659 | ipmb->channel = 0; /* FIXME - is this right? */ | |
3660 | ipmb->lun = intf->event_receiver_lun; | |
3661 | ipmb->slave_addr = intf->event_receiver; | |
3662 | } else if (intf->local_sel_device) { | |
3663 | /* The event receiver was not valid (or was | |
3664 | me), but I am an SEL device, just dump it | |
3665 | in my SEL. */ | |
3666 | si = (struct ipmi_system_interface_addr *) &addr; | |
3667 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3668 | si->channel = IPMI_BMC_CHANNEL; | |
3669 | si->lun = 0; | |
3670 | } else | |
3671 | continue; /* No where to send the event. */ | |
3672 | ||
3673 | ||
3674 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ | |
3675 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
3676 | msg.data = data; | |
3677 | msg.data_len = 16; | |
3678 | ||
3679 | j = 0; | |
3680 | while (*p) { | |
3681 | int size = strlen(p); | |
3682 | ||
3683 | if (size > 11) | |
3684 | size = 11; | |
3685 | data[0] = 0; | |
3686 | data[1] = 0; | |
3687 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 3688 | data[3] = intf->channels[0].address; |
1da177e4 LT |
3689 | data[4] = j++; /* sequence # */ |
3690 | /* Always give 11 bytes, so strncpy will fill | |
3691 | it with zeroes for me. */ | |
3692 | strncpy(data+5, p, 11); | |
3693 | p += size; | |
3694 | ||
3695 | i_ipmi_request(NULL, | |
3696 | intf, | |
3697 | &addr, | |
3698 | 0, | |
3699 | &msg, | |
56a55ec6 | 3700 | intf, |
1da177e4 LT |
3701 | &smi_msg, |
3702 | &recv_msg, | |
3703 | 0, | |
c14979b9 CM |
3704 | intf->channels[0].address, |
3705 | intf->channels[0].lun, | |
1da177e4 LT |
3706 | 0, 1); /* no retry, and no wait. */ |
3707 | } | |
3708 | } | |
3709 | #endif /* CONFIG_IPMI_PANIC_STRING */ | |
3710 | } | |
3711 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
3712 | ||
f18190bd | 3713 | static int has_panicked = 0; |
1da177e4 LT |
3714 | |
3715 | static int panic_event(struct notifier_block *this, | |
3716 | unsigned long event, | |
3717 | void *ptr) | |
3718 | { | |
3719 | int i; | |
3720 | ipmi_smi_t intf; | |
3721 | ||
f18190bd | 3722 | if (has_panicked) |
1da177e4 | 3723 | return NOTIFY_DONE; |
f18190bd | 3724 | has_panicked = 1; |
1da177e4 LT |
3725 | |
3726 | /* For every registered interface, set it to run to completion. */ | |
e8b33617 | 3727 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) { |
1da177e4 | 3728 | intf = ipmi_interfaces[i]; |
393d2cc3 | 3729 | if (IPMI_INVALID_INTERFACE(intf)) |
1da177e4 LT |
3730 | continue; |
3731 | ||
3732 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
3733 | } | |
3734 | ||
3735 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
3736 | send_panic_events(ptr); | |
3737 | #endif | |
3738 | ||
3739 | return NOTIFY_DONE; | |
3740 | } | |
3741 | ||
3742 | static struct notifier_block panic_block = { | |
3743 | .notifier_call = panic_event, | |
3744 | .next = NULL, | |
3745 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
3746 | }; | |
3747 | ||
3748 | static int ipmi_init_msghandler(void) | |
3749 | { | |
3750 | int i; | |
50c812b2 | 3751 | int rv; |
1da177e4 LT |
3752 | |
3753 | if (initialized) | |
3754 | return 0; | |
3755 | ||
50c812b2 CM |
3756 | rv = driver_register(&ipmidriver); |
3757 | if (rv) { | |
3758 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
3759 | return rv; | |
3760 | } | |
3761 | ||
1da177e4 | 3762 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 3763 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 3764 | |
393d2cc3 | 3765 | for (i = 0; i < MAX_IPMI_INTERFACES; i++) |
1da177e4 | 3766 | ipmi_interfaces[i] = NULL; |
1da177e4 | 3767 | |
3b625943 | 3768 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
3769 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
3770 | if (!proc_ipmi_root) { | |
3771 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
3772 | return -ENOMEM; | |
3773 | } | |
3774 | ||
3775 | proc_ipmi_root->owner = THIS_MODULE; | |
3b625943 | 3776 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 3777 | |
409035e0 CM |
3778 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
3779 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 3780 | |
e041c683 | 3781 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
3782 | |
3783 | initialized = 1; | |
3784 | ||
3785 | return 0; | |
3786 | } | |
3787 | ||
3788 | static __init int ipmi_init_msghandler_mod(void) | |
3789 | { | |
3790 | ipmi_init_msghandler(); | |
3791 | return 0; | |
3792 | } | |
3793 | ||
3794 | static __exit void cleanup_ipmi(void) | |
3795 | { | |
3796 | int count; | |
3797 | ||
3798 | if (!initialized) | |
3799 | return; | |
3800 | ||
e041c683 | 3801 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 LT |
3802 | |
3803 | /* This can't be called if any interfaces exist, so no worry about | |
3804 | shutting down the interfaces. */ | |
3805 | ||
3806 | /* Tell the timer to stop, then wait for it to stop. This avoids | |
3807 | problems with race conditions removing the timer here. */ | |
8f43f84f CM |
3808 | atomic_inc(&stop_operation); |
3809 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 3810 | |
3b625943 | 3811 | #ifdef CONFIG_PROC_FS |
1da177e4 | 3812 | remove_proc_entry(proc_ipmi_root->name, &proc_root); |
3b625943 | 3813 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 3814 | |
50c812b2 CM |
3815 | driver_unregister(&ipmidriver); |
3816 | ||
1da177e4 LT |
3817 | initialized = 0; |
3818 | ||
3819 | /* Check for buffer leaks. */ | |
3820 | count = atomic_read(&smi_msg_inuse_count); | |
3821 | if (count != 0) | |
3822 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
3823 | count); | |
3824 | count = atomic_read(&recv_msg_inuse_count); | |
3825 | if (count != 0) | |
3826 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
3827 | count); | |
3828 | } | |
3829 | module_exit(cleanup_ipmi); | |
3830 | ||
3831 | module_init(ipmi_init_msghandler_mod); | |
3832 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
3833 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
3834 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI interface."); | |
3835 | MODULE_VERSION(IPMI_DRIVER_VERSION); | |
1da177e4 LT |
3836 | |
3837 | EXPORT_SYMBOL(ipmi_create_user); | |
3838 | EXPORT_SYMBOL(ipmi_destroy_user); | |
3839 | EXPORT_SYMBOL(ipmi_get_version); | |
3840 | EXPORT_SYMBOL(ipmi_request_settime); | |
3841 | EXPORT_SYMBOL(ipmi_request_supply_msgs); | |
3842 | EXPORT_SYMBOL(ipmi_register_smi); | |
3843 | EXPORT_SYMBOL(ipmi_unregister_smi); | |
3844 | EXPORT_SYMBOL(ipmi_register_for_cmd); | |
3845 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); | |
3846 | EXPORT_SYMBOL(ipmi_smi_msg_received); | |
3847 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); | |
3848 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); | |
3849 | EXPORT_SYMBOL(ipmi_addr_length); | |
3850 | EXPORT_SYMBOL(ipmi_validate_addr); | |
3851 | EXPORT_SYMBOL(ipmi_set_gets_events); | |
3852 | EXPORT_SYMBOL(ipmi_smi_watcher_register); | |
3853 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); | |
3854 | EXPORT_SYMBOL(ipmi_set_my_address); | |
3855 | EXPORT_SYMBOL(ipmi_get_my_address); | |
3856 | EXPORT_SYMBOL(ipmi_set_my_LUN); | |
3857 | EXPORT_SYMBOL(ipmi_get_my_LUN); | |
3858 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); | |
3859 | EXPORT_SYMBOL(ipmi_user_set_run_to_completion); | |
393d2cc3 | 3860 | EXPORT_SYMBOL(ipmi_free_recv_msg); |