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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> | |
1da177e4 LT |
37 | #include <linux/poll.h> |
38 | #include <linux/spinlock.h> | |
d6dfd131 | 39 | #include <linux/mutex.h> |
1da177e4 LT |
40 | #include <linux/slab.h> |
41 | #include <linux/ipmi.h> | |
42 | #include <linux/ipmi_smi.h> | |
43 | #include <linux/notifier.h> | |
44 | #include <linux/init.h> | |
45 | #include <linux/proc_fs.h> | |
393d2cc3 | 46 | #include <linux/rcupdate.h> |
1da177e4 LT |
47 | |
48 | #define PFX "IPMI message handler: " | |
1fdd75bd | 49 | |
f7caa1b5 | 50 | #define IPMI_DRIVER_VERSION "39.2" |
1da177e4 LT |
51 | |
52 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
53 | static int ipmi_init_msghandler(void); | |
54 | ||
0c8204b3 | 55 | static int initialized; |
1da177e4 | 56 | |
3b625943 | 57 | #ifdef CONFIG_PROC_FS |
0c8204b3 | 58 | static struct proc_dir_entry *proc_ipmi_root; |
3b625943 | 59 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 60 | |
b9675136 CM |
61 | /* Remain in auto-maintenance mode for this amount of time (in ms). */ |
62 | #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000 | |
63 | ||
1da177e4 LT |
64 | #define MAX_EVENTS_IN_QUEUE 25 |
65 | ||
c70d7499 CM |
66 | /* |
67 | * Don't let a message sit in a queue forever, always time it with at lest | |
68 | * the max message timer. This is in milliseconds. | |
69 | */ | |
1da177e4 LT |
70 | #define MAX_MSG_TIMEOUT 60000 |
71 | ||
393d2cc3 CM |
72 | /* |
73 | * The main "user" data structure. | |
74 | */ | |
c70d7499 | 75 | struct ipmi_user { |
1da177e4 LT |
76 | struct list_head link; |
77 | ||
393d2cc3 CM |
78 | /* Set to "0" when the user is destroyed. */ |
79 | int valid; | |
80 | ||
81 | struct kref refcount; | |
82 | ||
1da177e4 LT |
83 | /* The upper layer that handles receive messages. */ |
84 | struct ipmi_user_hndl *handler; | |
85 | void *handler_data; | |
86 | ||
87 | /* The interface this user is bound to. */ | |
88 | ipmi_smi_t intf; | |
89 | ||
90 | /* Does this interface receive IPMI events? */ | |
91 | int gets_events; | |
92 | }; | |
93 | ||
c70d7499 | 94 | struct cmd_rcvr { |
1da177e4 LT |
95 | struct list_head link; |
96 | ||
97 | ipmi_user_t user; | |
98 | unsigned char netfn; | |
99 | unsigned char cmd; | |
c69c3127 | 100 | unsigned int chans; |
393d2cc3 CM |
101 | |
102 | /* | |
103 | * This is used to form a linked lised during mass deletion. | |
104 | * Since this is in an RCU list, we cannot use the link above | |
105 | * or change any data until the RCU period completes. So we | |
106 | * use this next variable during mass deletion so we can have | |
107 | * a list and don't have to wait and restart the search on | |
c70d7499 CM |
108 | * every individual deletion of a command. |
109 | */ | |
393d2cc3 | 110 | struct cmd_rcvr *next; |
1da177e4 LT |
111 | }; |
112 | ||
c70d7499 | 113 | struct seq_table { |
1da177e4 LT |
114 | unsigned int inuse : 1; |
115 | unsigned int broadcast : 1; | |
116 | ||
117 | unsigned long timeout; | |
118 | unsigned long orig_timeout; | |
119 | unsigned int retries_left; | |
120 | ||
c70d7499 CM |
121 | /* |
122 | * To verify on an incoming send message response that this is | |
123 | * the message that the response is for, we keep a sequence id | |
124 | * and increment it every time we send a message. | |
125 | */ | |
1da177e4 LT |
126 | long seqid; |
127 | ||
c70d7499 CM |
128 | /* |
129 | * This is held so we can properly respond to the message on a | |
130 | * timeout, and it is used to hold the temporary data for | |
131 | * retransmission, too. | |
132 | */ | |
1da177e4 LT |
133 | struct ipmi_recv_msg *recv_msg; |
134 | }; | |
135 | ||
c70d7499 CM |
136 | /* |
137 | * Store the information in a msgid (long) to allow us to find a | |
138 | * sequence table entry from the msgid. | |
139 | */ | |
1da177e4 LT |
140 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) |
141 | ||
142 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
143 | do { \ | |
144 | seq = ((msgid >> 26) & 0x3f); \ | |
145 | seqid = (msgid & 0x3fffff); \ | |
c70d7499 | 146 | } while (0) |
1da177e4 LT |
147 | |
148 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) | |
149 | ||
c70d7499 | 150 | struct ipmi_channel { |
1da177e4 LT |
151 | unsigned char medium; |
152 | unsigned char protocol; | |
c14979b9 | 153 | |
c70d7499 CM |
154 | /* |
155 | * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
156 | * but may be changed by the user. | |
157 | */ | |
c14979b9 CM |
158 | unsigned char address; |
159 | ||
c70d7499 CM |
160 | /* |
161 | * My LUN. This should generally stay the SMS LUN, but just in | |
162 | * case... | |
163 | */ | |
c14979b9 | 164 | unsigned char lun; |
1da177e4 LT |
165 | }; |
166 | ||
3b625943 | 167 | #ifdef CONFIG_PROC_FS |
c70d7499 | 168 | struct ipmi_proc_entry { |
1da177e4 LT |
169 | char *name; |
170 | struct ipmi_proc_entry *next; | |
171 | }; | |
3b625943 | 172 | #endif |
1da177e4 | 173 | |
c70d7499 | 174 | struct bmc_device { |
50c812b2 CM |
175 | struct platform_device *dev; |
176 | struct ipmi_device_id id; | |
177 | unsigned char guid[16]; | |
178 | int guid_set; | |
179 | ||
180 | struct kref refcount; | |
181 | ||
182 | /* bmc device attributes */ | |
183 | struct device_attribute device_id_attr; | |
184 | struct device_attribute provides_dev_sdrs_attr; | |
185 | struct device_attribute revision_attr; | |
186 | struct device_attribute firmware_rev_attr; | |
187 | struct device_attribute version_attr; | |
188 | struct device_attribute add_dev_support_attr; | |
189 | struct device_attribute manufacturer_id_attr; | |
190 | struct device_attribute product_id_attr; | |
191 | struct device_attribute guid_attr; | |
192 | struct device_attribute aux_firmware_rev_attr; | |
193 | }; | |
194 | ||
b2655f26 KB |
195 | /* |
196 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
197 | * structure. | |
198 | */ | |
73f2bdb9 CM |
199 | enum ipmi_stat_indexes { |
200 | /* Commands we got from the user that were invalid. */ | |
201 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 202 | |
73f2bdb9 CM |
203 | /* Commands we sent to the MC. */ |
204 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 205 | |
73f2bdb9 CM |
206 | /* Responses from the MC that were delivered to a user. */ |
207 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 208 | |
73f2bdb9 CM |
209 | /* Responses from the MC that were not delivered to a user. */ |
210 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 211 | |
73f2bdb9 CM |
212 | /* Commands we sent out to the IPMB bus. */ |
213 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 214 | |
73f2bdb9 CM |
215 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
216 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 217 | |
73f2bdb9 CM |
218 | /* Each retransmit increments this count. */ |
219 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 220 | |
73f2bdb9 CM |
221 | /* |
222 | * When a message times out (runs out of retransmits) this is | |
223 | * incremented. | |
224 | */ | |
225 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 226 | |
73f2bdb9 CM |
227 | /* |
228 | * This is like above, but for broadcasts. Broadcasts are | |
229 | * *not* included in the above count (they are expected to | |
230 | * time out). | |
231 | */ | |
232 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 233 | |
73f2bdb9 CM |
234 | /* Responses I have sent to the IPMB bus. */ |
235 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 236 | |
73f2bdb9 CM |
237 | /* The response was delivered to the user. */ |
238 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 239 | |
73f2bdb9 CM |
240 | /* The response had invalid data in it. */ |
241 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 242 | |
73f2bdb9 CM |
243 | /* The response didn't have anyone waiting for it. */ |
244 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 245 | |
73f2bdb9 CM |
246 | /* Commands we sent out to the IPMB bus. */ |
247 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 248 | |
73f2bdb9 CM |
249 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
250 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 251 | |
73f2bdb9 CM |
252 | /* Each retransmit increments this count. */ |
253 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 254 | |
73f2bdb9 CM |
255 | /* |
256 | * When a message times out (runs out of retransmits) this is | |
257 | * incremented. | |
258 | */ | |
259 | IPMI_STAT_timed_out_lan_commands, | |
260 | ||
261 | /* Responses I have sent to the IPMB bus. */ | |
262 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 263 | |
73f2bdb9 CM |
264 | /* The response was delivered to the user. */ |
265 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 266 | |
73f2bdb9 CM |
267 | /* The response had invalid data in it. */ |
268 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 269 | |
73f2bdb9 CM |
270 | /* The response didn't have anyone waiting for it. */ |
271 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 272 | |
73f2bdb9 CM |
273 | /* The command was delivered to the user. */ |
274 | IPMI_STAT_handled_commands, | |
b2655f26 | 275 | |
73f2bdb9 CM |
276 | /* The command had invalid data in it. */ |
277 | IPMI_STAT_invalid_commands, | |
b2655f26 | 278 | |
73f2bdb9 CM |
279 | /* The command didn't have anyone waiting for it. */ |
280 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 281 | |
73f2bdb9 CM |
282 | /* Invalid data in an event. */ |
283 | IPMI_STAT_invalid_events, | |
b2655f26 | 284 | |
73f2bdb9 CM |
285 | /* Events that were received with the proper format. */ |
286 | IPMI_STAT_events, | |
b2655f26 | 287 | |
b2655f26 | 288 | |
73f2bdb9 CM |
289 | /* This *must* remain last, add new values above this. */ |
290 | IPMI_NUM_STATS | |
291 | }; | |
b2655f26 KB |
292 | |
293 | ||
1da177e4 | 294 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 295 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 296 | struct ipmi_smi { |
1da177e4 LT |
297 | /* What interface number are we? */ |
298 | int intf_num; | |
299 | ||
393d2cc3 CM |
300 | struct kref refcount; |
301 | ||
bca0324d CM |
302 | /* Used for a list of interfaces. */ |
303 | struct list_head link; | |
304 | ||
c70d7499 CM |
305 | /* |
306 | * The list of upper layers that are using me. seq_lock | |
307 | * protects this. | |
308 | */ | |
393d2cc3 | 309 | struct list_head users; |
1da177e4 | 310 | |
b2c03941 CM |
311 | /* Information to supply to users. */ |
312 | unsigned char ipmi_version_major; | |
313 | unsigned char ipmi_version_minor; | |
314 | ||
1da177e4 LT |
315 | /* Used for wake ups at startup. */ |
316 | wait_queue_head_t waitq; | |
317 | ||
50c812b2 CM |
318 | struct bmc_device *bmc; |
319 | char *my_dev_name; | |
759643b8 | 320 | char *sysfs_name; |
1da177e4 | 321 | |
c70d7499 CM |
322 | /* |
323 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
324 | * must either be holding the ipmi_interfaces_mutex or be in |
325 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
326 | * value into a local variable and make sure it is not NULL. |
327 | */ | |
1da177e4 LT |
328 | struct ipmi_smi_handlers *handlers; |
329 | void *send_info; | |
330 | ||
3b625943 | 331 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
332 | /* A list of proc entries for this interface. */ |
333 | struct mutex proc_entry_lock; | |
1da177e4 | 334 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 335 | #endif |
1da177e4 | 336 | |
50c812b2 CM |
337 | /* Driver-model device for the system interface. */ |
338 | struct device *si_dev; | |
339 | ||
c70d7499 CM |
340 | /* |
341 | * A table of sequence numbers for this interface. We use the | |
342 | * sequence numbers for IPMB messages that go out of the | |
343 | * interface to match them up with their responses. A routine | |
344 | * is called periodically to time the items in this list. | |
345 | */ | |
1da177e4 LT |
346 | spinlock_t seq_lock; |
347 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
348 | int curr_seq; | |
349 | ||
c70d7499 CM |
350 | /* |
351 | * Messages that were delayed for some reason (out of memory, | |
352 | * for instance), will go in here to be processed later in a | |
353 | * periodic timer interrupt. | |
354 | */ | |
1da177e4 LT |
355 | spinlock_t waiting_msgs_lock; |
356 | struct list_head waiting_msgs; | |
357 | ||
c70d7499 CM |
358 | /* |
359 | * The list of command receivers that are registered for commands | |
360 | * on this interface. | |
361 | */ | |
d6dfd131 | 362 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
363 | struct list_head cmd_rcvrs; |
364 | ||
c70d7499 CM |
365 | /* |
366 | * Events that were queues because no one was there to receive | |
367 | * them. | |
368 | */ | |
1da177e4 LT |
369 | spinlock_t events_lock; /* For dealing with event stuff. */ |
370 | struct list_head waiting_events; | |
371 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
372 | char delivering_events; |
373 | char event_msg_printed; | |
1da177e4 | 374 | |
c70d7499 CM |
375 | /* |
376 | * The event receiver for my BMC, only really used at panic | |
377 | * shutdown as a place to store this. | |
378 | */ | |
1da177e4 LT |
379 | unsigned char event_receiver; |
380 | unsigned char event_receiver_lun; | |
381 | unsigned char local_sel_device; | |
382 | unsigned char local_event_generator; | |
383 | ||
b9675136 CM |
384 | /* For handling of maintenance mode. */ |
385 | int maintenance_mode; | |
386 | int maintenance_mode_enable; | |
387 | int auto_maintenance_timeout; | |
388 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
389 | ||
c70d7499 CM |
390 | /* |
391 | * A cheap hack, if this is non-null and a message to an | |
392 | * interface comes in with a NULL user, call this routine with | |
393 | * it. Note that the message will still be freed by the | |
394 | * caller. This only works on the system interface. | |
395 | */ | |
56a55ec6 | 396 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 397 | |
c70d7499 CM |
398 | /* |
399 | * When we are scanning the channels for an SMI, this will | |
400 | * tell which channel we are scanning. | |
401 | */ | |
1da177e4 LT |
402 | int curr_channel; |
403 | ||
404 | /* Channel information */ | |
405 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
406 | ||
407 | /* Proc FS stuff. */ | |
408 | struct proc_dir_entry *proc_dir; | |
409 | char proc_dir_name[10]; | |
410 | ||
b2655f26 | 411 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
412 | |
413 | /* | |
414 | * run_to_completion duplicate of smb_info, smi_info | |
415 | * and ipmi_serial_info structures. Used to decrease numbers of | |
416 | * parameters passed by "low" level IPMI code. | |
417 | */ | |
418 | int run_to_completion; | |
1da177e4 | 419 | }; |
50c812b2 | 420 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 421 | |
50c812b2 CM |
422 | /** |
423 | * The driver model view of the IPMI messaging driver. | |
424 | */ | |
425 | static struct device_driver ipmidriver = { | |
426 | .name = "ipmi", | |
427 | .bus = &platform_bus_type | |
428 | }; | |
429 | static DEFINE_MUTEX(ipmidriver_mutex); | |
430 | ||
bed9759b | 431 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 432 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 433 | |
c70d7499 CM |
434 | /* |
435 | * List of watchers that want to know when smi's are added and deleted. | |
436 | */ | |
bed9759b | 437 | static LIST_HEAD(smi_watchers); |
b2c03941 | 438 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 439 | |
393d2cc3 | 440 | |
b2655f26 KB |
441 | #define ipmi_inc_stat(intf, stat) \ |
442 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
443 | #define ipmi_get_stat(intf, stat) \ | |
444 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
445 | ||
446 | ||
393d2cc3 CM |
447 | static void free_recv_msg_list(struct list_head *q) |
448 | { | |
449 | struct ipmi_recv_msg *msg, *msg2; | |
450 | ||
451 | list_for_each_entry_safe(msg, msg2, q, link) { | |
452 | list_del(&msg->link); | |
453 | ipmi_free_recv_msg(msg); | |
454 | } | |
455 | } | |
456 | ||
f3ce6a0e CM |
457 | static void free_smi_msg_list(struct list_head *q) |
458 | { | |
459 | struct ipmi_smi_msg *msg, *msg2; | |
460 | ||
461 | list_for_each_entry_safe(msg, msg2, q, link) { | |
462 | list_del(&msg->link); | |
463 | ipmi_free_smi_msg(msg); | |
464 | } | |
465 | } | |
466 | ||
393d2cc3 CM |
467 | static void clean_up_interface_data(ipmi_smi_t intf) |
468 | { | |
469 | int i; | |
470 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
471 | struct list_head list; |
472 | ||
f3ce6a0e | 473 | free_smi_msg_list(&intf->waiting_msgs); |
393d2cc3 CM |
474 | free_recv_msg_list(&intf->waiting_events); |
475 | ||
78ba2faf CM |
476 | /* |
477 | * Wholesale remove all the entries from the list in the | |
478 | * interface and wait for RCU to know that none are in use. | |
479 | */ | |
d6dfd131 | 480 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
481 | INIT_LIST_HEAD(&list); |
482 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 483 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
484 | |
485 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
486 | kfree(rcvr); | |
487 | ||
488 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
489 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 490 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 491 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
492 | } |
493 | } | |
494 | ||
495 | static void intf_free(struct kref *ref) | |
496 | { | |
497 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
498 | ||
499 | clean_up_interface_data(intf); | |
500 | kfree(intf); | |
501 | } | |
502 | ||
bca0324d | 503 | struct watcher_entry { |
b2c03941 CM |
504 | int intf_num; |
505 | ipmi_smi_t intf; | |
bca0324d | 506 | struct list_head link; |
bca0324d CM |
507 | }; |
508 | ||
1da177e4 LT |
509 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
510 | { | |
bca0324d | 511 | ipmi_smi_t intf; |
e381d1c4 | 512 | LIST_HEAD(to_deliver); |
bca0324d CM |
513 | struct watcher_entry *e, *e2; |
514 | ||
b2c03941 CM |
515 | mutex_lock(&smi_watchers_mutex); |
516 | ||
bca0324d CM |
517 | mutex_lock(&ipmi_interfaces_mutex); |
518 | ||
b2c03941 | 519 | /* Build a list of things to deliver. */ |
78ba2faf | 520 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
521 | if (intf->intf_num == -1) |
522 | continue; | |
523 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
524 | if (!e) | |
525 | goto out_err; | |
b2c03941 CM |
526 | kref_get(&intf->refcount); |
527 | e->intf = intf; | |
bca0324d CM |
528 | e->intf_num = intf->intf_num; |
529 | list_add_tail(&e->link, &to_deliver); | |
530 | } | |
1da177e4 | 531 | |
b2c03941 CM |
532 | /* We will succeed, so add it to the list. */ |
533 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
534 | |
535 | mutex_unlock(&ipmi_interfaces_mutex); | |
536 | ||
537 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
538 | list_del(&e->link); | |
b2c03941 CM |
539 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
540 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 541 | kfree(e); |
1da177e4 | 542 | } |
bca0324d | 543 | |
b2c03941 | 544 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 545 | |
1da177e4 | 546 | return 0; |
bca0324d CM |
547 | |
548 | out_err: | |
b2c03941 CM |
549 | mutex_unlock(&ipmi_interfaces_mutex); |
550 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
551 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
552 | list_del(&e->link); | |
b2c03941 | 553 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
554 | kfree(e); |
555 | } | |
556 | return -ENOMEM; | |
1da177e4 | 557 | } |
c70d7499 | 558 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
559 | |
560 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
561 | { | |
b2c03941 | 562 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 563 | list_del(&(watcher->link)); |
b2c03941 | 564 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
565 | return 0; |
566 | } | |
c70d7499 | 567 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 568 | |
b2c03941 CM |
569 | /* |
570 | * Must be called with smi_watchers_mutex held. | |
571 | */ | |
1da177e4 | 572 | static void |
50c812b2 | 573 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
574 | { |
575 | struct ipmi_smi_watcher *w; | |
576 | ||
1da177e4 LT |
577 | list_for_each_entry(w, &smi_watchers, link) { |
578 | if (try_module_get(w->owner)) { | |
50c812b2 | 579 | w->new_smi(i, dev); |
1da177e4 LT |
580 | module_put(w->owner); |
581 | } | |
582 | } | |
1da177e4 LT |
583 | } |
584 | ||
585 | static int | |
586 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
587 | { | |
588 | if (addr1->addr_type != addr2->addr_type) | |
589 | return 0; | |
590 | ||
591 | if (addr1->channel != addr2->channel) | |
592 | return 0; | |
593 | ||
594 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
595 | struct ipmi_system_interface_addr *smi_addr1 | |
596 | = (struct ipmi_system_interface_addr *) addr1; | |
597 | struct ipmi_system_interface_addr *smi_addr2 | |
598 | = (struct ipmi_system_interface_addr *) addr2; | |
599 | return (smi_addr1->lun == smi_addr2->lun); | |
600 | } | |
601 | ||
602 | if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 603 | || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
1da177e4 LT |
604 | struct ipmi_ipmb_addr *ipmb_addr1 |
605 | = (struct ipmi_ipmb_addr *) addr1; | |
606 | struct ipmi_ipmb_addr *ipmb_addr2 | |
607 | = (struct ipmi_ipmb_addr *) addr2; | |
608 | ||
609 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
610 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
611 | } | |
612 | ||
613 | if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { | |
614 | struct ipmi_lan_addr *lan_addr1 | |
615 | = (struct ipmi_lan_addr *) addr1; | |
616 | struct ipmi_lan_addr *lan_addr2 | |
617 | = (struct ipmi_lan_addr *) addr2; | |
618 | ||
619 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
620 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
621 | && (lan_addr1->session_handle | |
622 | == lan_addr2->session_handle) | |
623 | && (lan_addr1->lun == lan_addr2->lun)); | |
624 | } | |
625 | ||
626 | return 1; | |
627 | } | |
628 | ||
629 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
630 | { | |
c70d7499 | 631 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 632 | return -EINVAL; |
1da177e4 LT |
633 | |
634 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
635 | if (addr->channel != IPMI_BMC_CHANNEL) | |
636 | return -EINVAL; | |
637 | return 0; | |
638 | } | |
639 | ||
640 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 641 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
642 | || (addr->channel < 0)) |
643 | return -EINVAL; | |
644 | ||
645 | if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 CM |
646 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
647 | if (len < sizeof(struct ipmi_ipmb_addr)) | |
1da177e4 | 648 | return -EINVAL; |
1da177e4 LT |
649 | return 0; |
650 | } | |
651 | ||
652 | if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
c70d7499 | 653 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 654 | return -EINVAL; |
1da177e4 LT |
655 | return 0; |
656 | } | |
657 | ||
658 | return -EINVAL; | |
659 | } | |
c70d7499 | 660 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
661 | |
662 | unsigned int ipmi_addr_length(int addr_type) | |
663 | { | |
664 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
665 | return sizeof(struct ipmi_system_interface_addr); | |
666 | ||
667 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 668 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 669 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
670 | |
671 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
672 | return sizeof(struct ipmi_lan_addr); | |
673 | ||
674 | return 0; | |
675 | } | |
c70d7499 | 676 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
677 | |
678 | static void deliver_response(struct ipmi_recv_msg *msg) | |
679 | { | |
8a3628d5 | 680 | if (!msg->user) { |
56a55ec6 | 681 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
682 | |
683 | /* Special handling for NULL users. */ | |
684 | if (intf->null_user_handler) { | |
685 | intf->null_user_handler(intf, msg); | |
b2655f26 | 686 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
687 | } else { |
688 | /* No handler, so give up. */ | |
b2655f26 | 689 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
690 | } |
691 | ipmi_free_recv_msg(msg); | |
692 | } else { | |
393d2cc3 CM |
693 | ipmi_user_t user = msg->user; |
694 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 695 | } |
1da177e4 LT |
696 | } |
697 | ||
b2c03941 CM |
698 | static void |
699 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
700 | { | |
701 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
702 | msg->msg_data[0] = err; | |
703 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
704 | msg->msg.data_len = 1; | |
705 | msg->msg.data = msg->msg_data; | |
706 | deliver_response(msg); | |
707 | } | |
708 | ||
c70d7499 CM |
709 | /* |
710 | * Find the next sequence number not being used and add the given | |
711 | * message with the given timeout to the sequence table. This must be | |
712 | * called with the interface's seq_lock held. | |
713 | */ | |
1da177e4 LT |
714 | static int intf_next_seq(ipmi_smi_t intf, |
715 | struct ipmi_recv_msg *recv_msg, | |
716 | unsigned long timeout, | |
717 | int retries, | |
718 | int broadcast, | |
719 | unsigned char *seq, | |
720 | long *seqid) | |
721 | { | |
722 | int rv = 0; | |
723 | unsigned int i; | |
724 | ||
c70d7499 CM |
725 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
726 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 727 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
728 | break; |
729 | } | |
730 | ||
8a3628d5 | 731 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
732 | intf->seq_table[i].recv_msg = recv_msg; |
733 | ||
c70d7499 CM |
734 | /* |
735 | * Start with the maximum timeout, when the send response | |
736 | * comes in we will start the real timer. | |
737 | */ | |
1da177e4 LT |
738 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
739 | intf->seq_table[i].orig_timeout = timeout; | |
740 | intf->seq_table[i].retries_left = retries; | |
741 | intf->seq_table[i].broadcast = broadcast; | |
742 | intf->seq_table[i].inuse = 1; | |
743 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
744 | *seq = i; | |
745 | *seqid = intf->seq_table[i].seqid; | |
746 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
747 | } else { | |
748 | rv = -EAGAIN; | |
749 | } | |
c70d7499 | 750 | |
1da177e4 LT |
751 | return rv; |
752 | } | |
753 | ||
c70d7499 CM |
754 | /* |
755 | * Return the receive message for the given sequence number and | |
756 | * release the sequence number so it can be reused. Some other data | |
757 | * is passed in to be sure the message matches up correctly (to help | |
758 | * guard against message coming in after their timeout and the | |
759 | * sequence number being reused). | |
760 | */ | |
1da177e4 LT |
761 | static int intf_find_seq(ipmi_smi_t intf, |
762 | unsigned char seq, | |
763 | short channel, | |
764 | unsigned char cmd, | |
765 | unsigned char netfn, | |
766 | struct ipmi_addr *addr, | |
767 | struct ipmi_recv_msg **recv_msg) | |
768 | { | |
769 | int rv = -ENODEV; | |
770 | unsigned long flags; | |
771 | ||
772 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
773 | return -EINVAL; | |
774 | ||
775 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
776 | if (intf->seq_table[seq].inuse) { | |
777 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
778 | ||
c70d7499 CM |
779 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
780 | && (msg->msg.netfn == netfn) | |
781 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
782 | *recv_msg = msg; |
783 | intf->seq_table[seq].inuse = 0; | |
784 | rv = 0; | |
785 | } | |
786 | } | |
787 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
788 | ||
789 | return rv; | |
790 | } | |
791 | ||
792 | ||
793 | /* Start the timer for a specific sequence table entry. */ | |
794 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
795 | long msgid) | |
796 | { | |
797 | int rv = -ENODEV; | |
798 | unsigned long flags; | |
799 | unsigned char seq; | |
800 | unsigned long seqid; | |
801 | ||
802 | ||
803 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
804 | ||
805 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
806 | /* |
807 | * We do this verification because the user can be deleted | |
808 | * while a message is outstanding. | |
809 | */ | |
1da177e4 | 810 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 811 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
812 | struct seq_table *ent = &(intf->seq_table[seq]); |
813 | ent->timeout = ent->orig_timeout; | |
814 | rv = 0; | |
815 | } | |
816 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
817 | ||
818 | return rv; | |
819 | } | |
820 | ||
821 | /* Got an error for the send message for a specific sequence number. */ | |
822 | static int intf_err_seq(ipmi_smi_t intf, | |
823 | long msgid, | |
824 | unsigned int err) | |
825 | { | |
826 | int rv = -ENODEV; | |
827 | unsigned long flags; | |
828 | unsigned char seq; | |
829 | unsigned long seqid; | |
830 | struct ipmi_recv_msg *msg = NULL; | |
831 | ||
832 | ||
833 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
834 | ||
835 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
836 | /* |
837 | * We do this verification because the user can be deleted | |
838 | * while a message is outstanding. | |
839 | */ | |
1da177e4 | 840 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 841 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
842 | struct seq_table *ent = &(intf->seq_table[seq]); |
843 | ||
844 | ent->inuse = 0; | |
845 | msg = ent->recv_msg; | |
846 | rv = 0; | |
847 | } | |
848 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
849 | ||
b2c03941 CM |
850 | if (msg) |
851 | deliver_err_response(msg, err); | |
1da177e4 LT |
852 | |
853 | return rv; | |
854 | } | |
855 | ||
856 | ||
857 | int ipmi_create_user(unsigned int if_num, | |
858 | struct ipmi_user_hndl *handler, | |
859 | void *handler_data, | |
860 | ipmi_user_t *user) | |
861 | { | |
862 | unsigned long flags; | |
863 | ipmi_user_t new_user; | |
864 | int rv = 0; | |
865 | ipmi_smi_t intf; | |
866 | ||
c70d7499 CM |
867 | /* |
868 | * There is no module usecount here, because it's not | |
869 | * required. Since this can only be used by and called from | |
870 | * other modules, they will implicitly use this module, and | |
871 | * thus this can't be removed unless the other modules are | |
872 | * removed. | |
873 | */ | |
1da177e4 LT |
874 | |
875 | if (handler == NULL) | |
876 | return -EINVAL; | |
877 | ||
c70d7499 CM |
878 | /* |
879 | * Make sure the driver is actually initialized, this handles | |
880 | * problems with initialization order. | |
881 | */ | |
1da177e4 LT |
882 | if (!initialized) { |
883 | rv = ipmi_init_msghandler(); | |
884 | if (rv) | |
885 | return rv; | |
886 | ||
c70d7499 CM |
887 | /* |
888 | * The init code doesn't return an error if it was turned | |
889 | * off, but it won't initialize. Check that. | |
890 | */ | |
1da177e4 LT |
891 | if (!initialized) |
892 | return -ENODEV; | |
893 | } | |
894 | ||
895 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 896 | if (!new_user) |
1da177e4 LT |
897 | return -ENOMEM; |
898 | ||
b2c03941 | 899 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
900 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
901 | if (intf->intf_num == if_num) | |
902 | goto found; | |
1da177e4 | 903 | } |
b2c03941 | 904 | /* Not found, return an error */ |
bca0324d CM |
905 | rv = -EINVAL; |
906 | goto out_kfree; | |
1da177e4 | 907 | |
bca0324d | 908 | found: |
393d2cc3 CM |
909 | /* Note that each existing user holds a refcount to the interface. */ |
910 | kref_get(&intf->refcount); | |
1da177e4 | 911 | |
393d2cc3 | 912 | kref_init(&new_user->refcount); |
1da177e4 LT |
913 | new_user->handler = handler; |
914 | new_user->handler_data = handler_data; | |
915 | new_user->intf = intf; | |
916 | new_user->gets_events = 0; | |
917 | ||
918 | if (!try_module_get(intf->handlers->owner)) { | |
919 | rv = -ENODEV; | |
5c98d29a | 920 | goto out_kref; |
1da177e4 LT |
921 | } |
922 | ||
923 | if (intf->handlers->inc_usecount) { | |
924 | rv = intf->handlers->inc_usecount(intf->send_info); | |
925 | if (rv) { | |
926 | module_put(intf->handlers->owner); | |
5c98d29a | 927 | goto out_kref; |
1da177e4 LT |
928 | } |
929 | } | |
930 | ||
c70d7499 CM |
931 | /* |
932 | * Hold the lock so intf->handlers is guaranteed to be good | |
933 | * until now | |
934 | */ | |
b2c03941 CM |
935 | mutex_unlock(&ipmi_interfaces_mutex); |
936 | ||
393d2cc3 CM |
937 | new_user->valid = 1; |
938 | spin_lock_irqsave(&intf->seq_lock, flags); | |
939 | list_add_rcu(&new_user->link, &intf->users); | |
940 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
941 | *user = new_user; | |
942 | return 0; | |
1da177e4 | 943 | |
5c98d29a | 944 | out_kref: |
393d2cc3 | 945 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 946 | out_kfree: |
b2c03941 | 947 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 948 | kfree(new_user); |
1da177e4 LT |
949 | return rv; |
950 | } | |
c70d7499 | 951 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 952 | |
393d2cc3 CM |
953 | static void free_user(struct kref *ref) |
954 | { | |
955 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
956 | kfree(user); | |
957 | } | |
958 | ||
959 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 960 | { |
393d2cc3 | 961 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
962 | int i; |
963 | unsigned long flags; | |
393d2cc3 | 964 | struct cmd_rcvr *rcvr; |
393d2cc3 | 965 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 966 | |
8a3628d5 | 967 | user->valid = 0; |
1da177e4 | 968 | |
393d2cc3 CM |
969 | /* Remove the user from the interface's sequence table. */ |
970 | spin_lock_irqsave(&intf->seq_lock, flags); | |
971 | list_del_rcu(&user->link); | |
1da177e4 | 972 | |
e8b33617 | 973 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 974 | if (intf->seq_table[i].inuse |
c70d7499 | 975 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 976 | intf->seq_table[i].inuse = 0; |
b2c03941 | 977 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
978 | } |
979 | } | |
393d2cc3 CM |
980 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
981 | ||
982 | /* | |
983 | * Remove the user from the command receiver's table. First | |
984 | * we build a list of everything (not using the standard link, | |
985 | * since other things may be using it till we do | |
986 | * synchronize_rcu()) then free everything in that list. | |
987 | */ | |
d6dfd131 | 988 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 989 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 990 | if (rcvr->user == user) { |
393d2cc3 CM |
991 | list_del_rcu(&rcvr->link); |
992 | rcvr->next = rcvrs; | |
993 | rcvrs = rcvr; | |
1da177e4 LT |
994 | } |
995 | } | |
d6dfd131 | 996 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
997 | synchronize_rcu(); |
998 | while (rcvrs) { | |
999 | rcvr = rcvrs; | |
1000 | rcvrs = rcvr->next; | |
1001 | kfree(rcvr); | |
1002 | } | |
1da177e4 | 1003 | |
b2c03941 CM |
1004 | mutex_lock(&ipmi_interfaces_mutex); |
1005 | if (intf->handlers) { | |
1006 | module_put(intf->handlers->owner); | |
1007 | if (intf->handlers->dec_usecount) | |
1008 | intf->handlers->dec_usecount(intf->send_info); | |
1009 | } | |
1010 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1011 | |
393d2cc3 | 1012 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1013 | |
393d2cc3 | 1014 | kref_put(&user->refcount, free_user); |
1da177e4 | 1015 | |
8a3628d5 | 1016 | return 0; |
1da177e4 | 1017 | } |
c70d7499 | 1018 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1019 | |
1020 | void ipmi_get_version(ipmi_user_t user, | |
1021 | unsigned char *major, | |
1022 | unsigned char *minor) | |
1023 | { | |
b2c03941 CM |
1024 | *major = user->intf->ipmi_version_major; |
1025 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1026 | } |
c70d7499 | 1027 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1028 | |
c14979b9 CM |
1029 | int ipmi_set_my_address(ipmi_user_t user, |
1030 | unsigned int channel, | |
1031 | unsigned char address) | |
1da177e4 | 1032 | { |
c14979b9 CM |
1033 | if (channel >= IPMI_MAX_CHANNELS) |
1034 | return -EINVAL; | |
1035 | user->intf->channels[channel].address = address; | |
1036 | return 0; | |
1da177e4 | 1037 | } |
c70d7499 | 1038 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1039 | |
c14979b9 CM |
1040 | int ipmi_get_my_address(ipmi_user_t user, |
1041 | unsigned int channel, | |
1042 | unsigned char *address) | |
1da177e4 | 1043 | { |
c14979b9 CM |
1044 | if (channel >= IPMI_MAX_CHANNELS) |
1045 | return -EINVAL; | |
1046 | *address = user->intf->channels[channel].address; | |
1047 | return 0; | |
1da177e4 | 1048 | } |
c70d7499 | 1049 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1050 | |
c14979b9 CM |
1051 | int ipmi_set_my_LUN(ipmi_user_t user, |
1052 | unsigned int channel, | |
1053 | unsigned char LUN) | |
1da177e4 | 1054 | { |
c14979b9 CM |
1055 | if (channel >= IPMI_MAX_CHANNELS) |
1056 | return -EINVAL; | |
1057 | user->intf->channels[channel].lun = LUN & 0x3; | |
1058 | return 0; | |
1da177e4 | 1059 | } |
c70d7499 | 1060 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1061 | |
c14979b9 CM |
1062 | int ipmi_get_my_LUN(ipmi_user_t user, |
1063 | unsigned int channel, | |
1064 | unsigned char *address) | |
1da177e4 | 1065 | { |
c14979b9 CM |
1066 | if (channel >= IPMI_MAX_CHANNELS) |
1067 | return -EINVAL; | |
1068 | *address = user->intf->channels[channel].lun; | |
1069 | return 0; | |
1da177e4 | 1070 | } |
c70d7499 | 1071 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1072 | |
b9675136 CM |
1073 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1074 | { | |
1075 | int mode; | |
1076 | unsigned long flags; | |
1077 | ||
1078 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1079 | mode = user->intf->maintenance_mode; | |
1080 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1081 | ||
1082 | return mode; | |
1083 | } | |
1084 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1085 | ||
1086 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1087 | { | |
1088 | if (intf->handlers->set_maintenance_mode) | |
1089 | intf->handlers->set_maintenance_mode( | |
1090 | intf->send_info, intf->maintenance_mode_enable); | |
1091 | } | |
1092 | ||
1093 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1094 | { | |
1095 | int rv = 0; | |
1096 | unsigned long flags; | |
1097 | ipmi_smi_t intf = user->intf; | |
1098 | ||
1099 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1100 | if (intf->maintenance_mode != mode) { | |
1101 | switch (mode) { | |
1102 | case IPMI_MAINTENANCE_MODE_AUTO: | |
1103 | intf->maintenance_mode = mode; | |
1104 | intf->maintenance_mode_enable | |
1105 | = (intf->auto_maintenance_timeout > 0); | |
1106 | break; | |
1107 | ||
1108 | case IPMI_MAINTENANCE_MODE_OFF: | |
1109 | intf->maintenance_mode = mode; | |
1110 | intf->maintenance_mode_enable = 0; | |
1111 | break; | |
1112 | ||
1113 | case IPMI_MAINTENANCE_MODE_ON: | |
1114 | intf->maintenance_mode = mode; | |
1115 | intf->maintenance_mode_enable = 1; | |
1116 | break; | |
1117 | ||
1118 | default: | |
1119 | rv = -EINVAL; | |
1120 | goto out_unlock; | |
1121 | } | |
1122 | ||
1123 | maintenance_mode_update(intf); | |
1124 | } | |
1125 | out_unlock: | |
1126 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1127 | ||
1128 | return rv; | |
1129 | } | |
1130 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1131 | ||
1da177e4 LT |
1132 | int ipmi_set_gets_events(ipmi_user_t user, int val) |
1133 | { | |
393d2cc3 CM |
1134 | unsigned long flags; |
1135 | ipmi_smi_t intf = user->intf; | |
1136 | struct ipmi_recv_msg *msg, *msg2; | |
1137 | struct list_head msgs; | |
1da177e4 | 1138 | |
393d2cc3 CM |
1139 | INIT_LIST_HEAD(&msgs); |
1140 | ||
1141 | spin_lock_irqsave(&intf->events_lock, flags); | |
1da177e4 LT |
1142 | user->gets_events = val; |
1143 | ||
b2c03941 CM |
1144 | if (intf->delivering_events) |
1145 | /* | |
1146 | * Another thread is delivering events for this, so | |
1147 | * let it handle any new events. | |
1148 | */ | |
1149 | goto out; | |
1150 | ||
1151 | /* Deliver any queued events. */ | |
1152 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1153 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1154 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1155 | intf->waiting_events_count = 0; |
87ebd06f CM |
1156 | if (intf->event_msg_printed) { |
1157 | printk(KERN_WARNING PFX "Event queue no longer" | |
1158 | " full\n"); | |
1159 | intf->event_msg_printed = 0; | |
1160 | } | |
393d2cc3 | 1161 | |
b2c03941 CM |
1162 | intf->delivering_events = 1; |
1163 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1164 | ||
1165 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1166 | msg->user = user; | |
1167 | kref_get(&user->refcount); | |
1168 | deliver_response(msg); | |
1169 | } | |
1170 | ||
1171 | spin_lock_irqsave(&intf->events_lock, flags); | |
1172 | intf->delivering_events = 0; | |
393d2cc3 CM |
1173 | } |
1174 | ||
b2c03941 | 1175 | out: |
393d2cc3 | 1176 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1177 | |
1178 | return 0; | |
1179 | } | |
c70d7499 | 1180 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1181 | |
393d2cc3 CM |
1182 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1183 | unsigned char netfn, | |
c69c3127 CM |
1184 | unsigned char cmd, |
1185 | unsigned char chan) | |
393d2cc3 CM |
1186 | { |
1187 | struct cmd_rcvr *rcvr; | |
1188 | ||
1189 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1190 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1191 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1192 | return rcvr; |
1193 | } | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
c69c3127 CM |
1197 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1198 | unsigned char netfn, | |
1199 | unsigned char cmd, | |
1200 | unsigned int chans) | |
1201 | { | |
1202 | struct cmd_rcvr *rcvr; | |
1203 | ||
1204 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1205 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1206 | && (rcvr->chans & chans)) | |
1207 | return 0; | |
1208 | } | |
1209 | return 1; | |
1210 | } | |
1211 | ||
1da177e4 LT |
1212 | int ipmi_register_for_cmd(ipmi_user_t user, |
1213 | unsigned char netfn, | |
c69c3127 CM |
1214 | unsigned char cmd, |
1215 | unsigned int chans) | |
1da177e4 | 1216 | { |
393d2cc3 CM |
1217 | ipmi_smi_t intf = user->intf; |
1218 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1219 | int rv = 0; |
1da177e4 LT |
1220 | |
1221 | ||
1222 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1223 | if (!rcvr) |
1da177e4 | 1224 | return -ENOMEM; |
393d2cc3 CM |
1225 | rcvr->cmd = cmd; |
1226 | rcvr->netfn = netfn; | |
c69c3127 | 1227 | rcvr->chans = chans; |
393d2cc3 | 1228 | rcvr->user = user; |
1da177e4 | 1229 | |
d6dfd131 | 1230 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1231 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1232 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1233 | rv = -EBUSY; |
1234 | goto out_unlock; | |
1da177e4 | 1235 | } |
877197ef | 1236 | |
393d2cc3 | 1237 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1238 | |
393d2cc3 | 1239 | out_unlock: |
d6dfd131 | 1240 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1241 | if (rv) |
1242 | kfree(rcvr); | |
1243 | ||
1244 | return rv; | |
1245 | } | |
c70d7499 | 1246 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1247 | |
1248 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1249 | unsigned char netfn, | |
c69c3127 CM |
1250 | unsigned char cmd, |
1251 | unsigned int chans) | |
1da177e4 | 1252 | { |
393d2cc3 CM |
1253 | ipmi_smi_t intf = user->intf; |
1254 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1255 | struct cmd_rcvr *rcvrs = NULL; |
1256 | int i, rv = -ENOENT; | |
1da177e4 | 1257 | |
d6dfd131 | 1258 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1259 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1260 | if (((1 << i) & chans) == 0) | |
1261 | continue; | |
1262 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1263 | if (rcvr == NULL) | |
1264 | continue; | |
1265 | if (rcvr->user == user) { | |
1266 | rv = 0; | |
1267 | rcvr->chans &= ~chans; | |
1268 | if (rcvr->chans == 0) { | |
1269 | list_del_rcu(&rcvr->link); | |
1270 | rcvr->next = rcvrs; | |
1271 | rcvrs = rcvr; | |
1272 | } | |
1273 | } | |
1274 | } | |
1275 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1276 | synchronize_rcu(); | |
1277 | while (rcvrs) { | |
1278 | rcvr = rcvrs; | |
1279 | rcvrs = rcvr->next; | |
393d2cc3 | 1280 | kfree(rcvr); |
1da177e4 | 1281 | } |
c69c3127 | 1282 | return rv; |
1da177e4 | 1283 | } |
c70d7499 | 1284 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1285 | |
1da177e4 LT |
1286 | static unsigned char |
1287 | ipmb_checksum(unsigned char *data, int size) | |
1288 | { | |
1289 | unsigned char csum = 0; | |
c70d7499 | 1290 | |
1da177e4 LT |
1291 | for (; size > 0; size--, data++) |
1292 | csum += *data; | |
1293 | ||
1294 | return -csum; | |
1295 | } | |
1296 | ||
1297 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1298 | struct kernel_ipmi_msg *msg, | |
1299 | struct ipmi_ipmb_addr *ipmb_addr, | |
1300 | long msgid, | |
1301 | unsigned char ipmb_seq, | |
1302 | int broadcast, | |
1303 | unsigned char source_address, | |
1304 | unsigned char source_lun) | |
1305 | { | |
1306 | int i = broadcast; | |
1307 | ||
1308 | /* Format the IPMB header data. */ | |
1309 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1310 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1311 | smi_msg->data[2] = ipmb_addr->channel; | |
1312 | if (broadcast) | |
1313 | smi_msg->data[3] = 0; | |
1314 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1315 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1316 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1317 | smi_msg->data[i+6] = source_address; | |
1318 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1319 | smi_msg->data[i+8] = msg->cmd; | |
1320 | ||
1321 | /* Now tack on the data to the message. */ | |
1322 | if (msg->data_len > 0) | |
1323 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1324 | msg->data_len); | |
1325 | smi_msg->data_size = msg->data_len + 9; | |
1326 | ||
1327 | /* Now calculate the checksum and tack it on. */ | |
1328 | smi_msg->data[i+smi_msg->data_size] | |
1329 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1330 | smi_msg->data_size-6); | |
1331 | ||
c70d7499 CM |
1332 | /* |
1333 | * Add on the checksum size and the offset from the | |
1334 | * broadcast. | |
1335 | */ | |
1da177e4 LT |
1336 | smi_msg->data_size += 1 + i; |
1337 | ||
1338 | smi_msg->msgid = msgid; | |
1339 | } | |
1340 | ||
1341 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1342 | struct kernel_ipmi_msg *msg, | |
1343 | struct ipmi_lan_addr *lan_addr, | |
1344 | long msgid, | |
1345 | unsigned char ipmb_seq, | |
1346 | unsigned char source_lun) | |
1347 | { | |
1348 | /* Format the IPMB header data. */ | |
1349 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1350 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1351 | smi_msg->data[2] = lan_addr->channel; | |
1352 | smi_msg->data[3] = lan_addr->session_handle; | |
1353 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1354 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1355 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1356 | smi_msg->data[7] = lan_addr->local_SWID; | |
1357 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1358 | smi_msg->data[9] = msg->cmd; | |
1359 | ||
1360 | /* Now tack on the data to the message. */ | |
1361 | if (msg->data_len > 0) | |
1362 | memcpy(&(smi_msg->data[10]), msg->data, | |
1363 | msg->data_len); | |
1364 | smi_msg->data_size = msg->data_len + 10; | |
1365 | ||
1366 | /* Now calculate the checksum and tack it on. */ | |
1367 | smi_msg->data[smi_msg->data_size] | |
1368 | = ipmb_checksum(&(smi_msg->data[7]), | |
1369 | smi_msg->data_size-7); | |
1370 | ||
c70d7499 CM |
1371 | /* |
1372 | * Add on the checksum size and the offset from the | |
1373 | * broadcast. | |
1374 | */ | |
1da177e4 LT |
1375 | smi_msg->data_size += 1; |
1376 | ||
1377 | smi_msg->msgid = msgid; | |
1378 | } | |
1379 | ||
c70d7499 CM |
1380 | /* |
1381 | * Separate from ipmi_request so that the user does not have to be | |
1382 | * supplied in certain circumstances (mainly at panic time). If | |
1383 | * messages are supplied, they will be freed, even if an error | |
1384 | * occurs. | |
1385 | */ | |
393d2cc3 CM |
1386 | static int i_ipmi_request(ipmi_user_t user, |
1387 | ipmi_smi_t intf, | |
1388 | struct ipmi_addr *addr, | |
1389 | long msgid, | |
1390 | struct kernel_ipmi_msg *msg, | |
1391 | void *user_msg_data, | |
1392 | void *supplied_smi, | |
1393 | struct ipmi_recv_msg *supplied_recv, | |
1394 | int priority, | |
1395 | unsigned char source_address, | |
1396 | unsigned char source_lun, | |
1397 | int retries, | |
1398 | unsigned int retry_time_ms) | |
1da177e4 | 1399 | { |
b2c03941 CM |
1400 | int rv = 0; |
1401 | struct ipmi_smi_msg *smi_msg; | |
1402 | struct ipmi_recv_msg *recv_msg; | |
1403 | unsigned long flags; | |
1404 | struct ipmi_smi_handlers *handlers; | |
1da177e4 LT |
1405 | |
1406 | ||
c70d7499 | 1407 | if (supplied_recv) |
1da177e4 | 1408 | recv_msg = supplied_recv; |
c70d7499 | 1409 | else { |
1da177e4 | 1410 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1411 | if (recv_msg == NULL) |
1da177e4 | 1412 | return -ENOMEM; |
1da177e4 LT |
1413 | } |
1414 | recv_msg->user_msg_data = user_msg_data; | |
1415 | ||
c70d7499 | 1416 | if (supplied_smi) |
1da177e4 | 1417 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1418 | else { |
1da177e4 LT |
1419 | smi_msg = ipmi_alloc_smi_msg(); |
1420 | if (smi_msg == NULL) { | |
1421 | ipmi_free_recv_msg(recv_msg); | |
1422 | return -ENOMEM; | |
1423 | } | |
1424 | } | |
1425 | ||
b2c03941 CM |
1426 | rcu_read_lock(); |
1427 | handlers = intf->handlers; | |
1428 | if (!handlers) { | |
1429 | rv = -ENODEV; | |
1430 | goto out_err; | |
1431 | } | |
1432 | ||
1da177e4 | 1433 | recv_msg->user = user; |
393d2cc3 CM |
1434 | if (user) |
1435 | kref_get(&user->refcount); | |
1da177e4 | 1436 | recv_msg->msgid = msgid; |
c70d7499 CM |
1437 | /* |
1438 | * Store the message to send in the receive message so timeout | |
1439 | * responses can get the proper response data. | |
1440 | */ | |
1da177e4 LT |
1441 | recv_msg->msg = *msg; |
1442 | ||
1443 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1444 | struct ipmi_system_interface_addr *smi_addr; | |
1445 | ||
1446 | if (msg->netfn & 1) { | |
1447 | /* Responses are not allowed to the SMI. */ | |
1448 | rv = -EINVAL; | |
1449 | goto out_err; | |
1450 | } | |
1451 | ||
1452 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1453 | if (smi_addr->lun > 3) { | |
b2655f26 | 1454 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1455 | rv = -EINVAL; |
1456 | goto out_err; | |
1457 | } | |
1458 | ||
1459 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1460 | ||
1461 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1462 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1463 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1464 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1465 | /* | |
1466 | * We don't let the user do these, since we manage | |
1467 | * the sequence numbers. | |
1468 | */ | |
b2655f26 | 1469 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1470 | rv = -EINVAL; |
1471 | goto out_err; | |
1472 | } | |
1473 | ||
b9675136 CM |
1474 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1475 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1476 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1477 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1478 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1479 | intf->auto_maintenance_timeout | |
1480 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1481 | if (!intf->maintenance_mode | |
c70d7499 | 1482 | && !intf->maintenance_mode_enable) { |
b9675136 CM |
1483 | intf->maintenance_mode_enable = 1; |
1484 | maintenance_mode_update(intf); | |
1485 | } | |
1486 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1487 | flags); | |
1488 | } | |
1489 | ||
1da177e4 | 1490 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1491 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1492 | rv = -EMSGSIZE; |
1493 | goto out_err; | |
1494 | } | |
1495 | ||
1496 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1497 | smi_msg->data[1] = msg->cmd; | |
1498 | smi_msg->msgid = msgid; | |
1499 | smi_msg->user_data = recv_msg; | |
1500 | if (msg->data_len > 0) | |
1501 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1502 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1503 | ipmi_inc_stat(intf, sent_local_commands); |
1da177e4 | 1504 | } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) |
c70d7499 | 1505 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
1da177e4 LT |
1506 | struct ipmi_ipmb_addr *ipmb_addr; |
1507 | unsigned char ipmb_seq; | |
1508 | long seqid; | |
1509 | int broadcast = 0; | |
1510 | ||
9c101fd4 | 1511 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1512 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1513 | rv = -EINVAL; |
1514 | goto out_err; | |
1515 | } | |
1516 | ||
1517 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1518 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1519 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1520 | rv = -EINVAL; |
1521 | goto out_err; | |
1522 | } | |
1523 | ||
1524 | if (retries < 0) { | |
1525 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1526 | retries = 0; /* Don't retry broadcasts. */ | |
1527 | else | |
1528 | retries = 4; | |
1529 | } | |
1530 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1531 | /* |
1532 | * Broadcasts add a zero at the beginning of the | |
1533 | * message, but otherwise is the same as an IPMB | |
1534 | * address. | |
1535 | */ | |
1da177e4 LT |
1536 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1537 | broadcast = 1; | |
1538 | } | |
1539 | ||
1540 | ||
1541 | /* Default to 1 second retries. */ | |
1542 | if (retry_time_ms == 0) | |
1543 | retry_time_ms = 1000; | |
1544 | ||
c70d7499 CM |
1545 | /* |
1546 | * 9 for the header and 1 for the checksum, plus | |
1547 | * possibly one for the broadcast. | |
1548 | */ | |
1da177e4 | 1549 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1550 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1551 | rv = -EMSGSIZE; |
1552 | goto out_err; | |
1553 | } | |
1554 | ||
1555 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1556 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1557 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1558 | rv = -EINVAL; |
1559 | goto out_err; | |
1560 | } | |
1561 | ||
1562 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1563 | ||
1564 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1565 | /* |
1566 | * It's a response, so use the user's sequence | |
1567 | * from msgid. | |
1568 | */ | |
b2655f26 | 1569 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1570 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1571 | msgid, broadcast, | |
1572 | source_address, source_lun); | |
1573 | ||
c70d7499 CM |
1574 | /* |
1575 | * Save the receive message so we can use it | |
1576 | * to deliver the response. | |
1577 | */ | |
1da177e4 LT |
1578 | smi_msg->user_data = recv_msg; |
1579 | } else { | |
1580 | /* It's a command, so get a sequence for it. */ | |
1581 | ||
1582 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1583 | ||
b2655f26 | 1584 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1da177e4 | 1585 | |
c70d7499 CM |
1586 | /* |
1587 | * Create a sequence number with a 1 second | |
1588 | * timeout and 4 retries. | |
1589 | */ | |
1da177e4 LT |
1590 | rv = intf_next_seq(intf, |
1591 | recv_msg, | |
1592 | retry_time_ms, | |
1593 | retries, | |
1594 | broadcast, | |
1595 | &ipmb_seq, | |
1596 | &seqid); | |
1597 | if (rv) { | |
c70d7499 CM |
1598 | /* |
1599 | * We have used up all the sequence numbers, | |
1600 | * probably, so abort. | |
1601 | */ | |
1da177e4 LT |
1602 | spin_unlock_irqrestore(&(intf->seq_lock), |
1603 | flags); | |
1604 | goto out_err; | |
1605 | } | |
1606 | ||
c70d7499 CM |
1607 | /* |
1608 | * Store the sequence number in the message, | |
1609 | * so that when the send message response | |
1610 | * comes back we can start the timer. | |
1611 | */ | |
1da177e4 LT |
1612 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1613 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1614 | ipmb_seq, broadcast, | |
1615 | source_address, source_lun); | |
1616 | ||
c70d7499 CM |
1617 | /* |
1618 | * Copy the message into the recv message data, so we | |
1619 | * can retransmit it later if necessary. | |
1620 | */ | |
1da177e4 LT |
1621 | memcpy(recv_msg->msg_data, smi_msg->data, |
1622 | smi_msg->data_size); | |
1623 | recv_msg->msg.data = recv_msg->msg_data; | |
1624 | recv_msg->msg.data_len = smi_msg->data_size; | |
1625 | ||
c70d7499 CM |
1626 | /* |
1627 | * We don't unlock until here, because we need | |
1628 | * to copy the completed message into the | |
1629 | * recv_msg before we release the lock. | |
1630 | * Otherwise, race conditions may bite us. I | |
1631 | * know that's pretty paranoid, but I prefer | |
1632 | * to be correct. | |
1633 | */ | |
1da177e4 LT |
1634 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1635 | } | |
1636 | } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
1637 | struct ipmi_lan_addr *lan_addr; | |
1638 | unsigned char ipmb_seq; | |
1639 | long seqid; | |
1640 | ||
12fc1d7b | 1641 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1642 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1643 | rv = -EINVAL; |
1644 | goto out_err; | |
1645 | } | |
1646 | ||
1647 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1648 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1649 | && (intf->channels[addr->channel].medium |
c70d7499 | 1650 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1651 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1652 | rv = -EINVAL; |
1653 | goto out_err; | |
1654 | } | |
1655 | ||
1656 | retries = 4; | |
1657 | ||
1658 | /* Default to 1 second retries. */ | |
1659 | if (retry_time_ms == 0) | |
1660 | retry_time_ms = 1000; | |
1661 | ||
1662 | /* 11 for the header and 1 for the checksum. */ | |
1663 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1664 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1665 | rv = -EMSGSIZE; |
1666 | goto out_err; | |
1667 | } | |
1668 | ||
1669 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1670 | if (lan_addr->lun > 3) { | |
b2655f26 | 1671 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1672 | rv = -EINVAL; |
1673 | goto out_err; | |
1674 | } | |
1675 | ||
1676 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1677 | ||
1678 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1679 | /* |
1680 | * It's a response, so use the user's sequence | |
1681 | * from msgid. | |
1682 | */ | |
b2655f26 | 1683 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1684 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1685 | msgid, source_lun); | |
1686 | ||
c70d7499 CM |
1687 | /* |
1688 | * Save the receive message so we can use it | |
1689 | * to deliver the response. | |
1690 | */ | |
1da177e4 LT |
1691 | smi_msg->user_data = recv_msg; |
1692 | } else { | |
1693 | /* It's a command, so get a sequence for it. */ | |
1694 | ||
1695 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1696 | ||
b2655f26 | 1697 | ipmi_inc_stat(intf, sent_lan_commands); |
1da177e4 | 1698 | |
c70d7499 CM |
1699 | /* |
1700 | * Create a sequence number with a 1 second | |
1701 | * timeout and 4 retries. | |
1702 | */ | |
1da177e4 LT |
1703 | rv = intf_next_seq(intf, |
1704 | recv_msg, | |
1705 | retry_time_ms, | |
1706 | retries, | |
1707 | 0, | |
1708 | &ipmb_seq, | |
1709 | &seqid); | |
1710 | if (rv) { | |
c70d7499 CM |
1711 | /* |
1712 | * We have used up all the sequence numbers, | |
1713 | * probably, so abort. | |
1714 | */ | |
1da177e4 LT |
1715 | spin_unlock_irqrestore(&(intf->seq_lock), |
1716 | flags); | |
1717 | goto out_err; | |
1718 | } | |
1719 | ||
c70d7499 CM |
1720 | /* |
1721 | * Store the sequence number in the message, | |
1722 | * so that when the send message response | |
1723 | * comes back we can start the timer. | |
1724 | */ | |
1da177e4 LT |
1725 | format_lan_msg(smi_msg, msg, lan_addr, |
1726 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1727 | ipmb_seq, source_lun); | |
1728 | ||
c70d7499 CM |
1729 | /* |
1730 | * Copy the message into the recv message data, so we | |
1731 | * can retransmit it later if necessary. | |
1732 | */ | |
1da177e4 LT |
1733 | memcpy(recv_msg->msg_data, smi_msg->data, |
1734 | smi_msg->data_size); | |
1735 | recv_msg->msg.data = recv_msg->msg_data; | |
1736 | recv_msg->msg.data_len = smi_msg->data_size; | |
1737 | ||
c70d7499 CM |
1738 | /* |
1739 | * We don't unlock until here, because we need | |
1740 | * to copy the completed message into the | |
1741 | * recv_msg before we release the lock. | |
1742 | * Otherwise, race conditions may bite us. I | |
1743 | * know that's pretty paranoid, but I prefer | |
1744 | * to be correct. | |
1745 | */ | |
1da177e4 LT |
1746 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1747 | } | |
1748 | } else { | |
1749 | /* Unknown address type. */ | |
b2655f26 | 1750 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1751 | rv = -EINVAL; |
1752 | goto out_err; | |
1753 | } | |
1754 | ||
1755 | #ifdef DEBUG_MSGING | |
1756 | { | |
1757 | int m; | |
e8b33617 | 1758 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1759 | printk(" %2.2x", smi_msg->data[m]); |
1760 | printk("\n"); | |
1761 | } | |
1762 | #endif | |
b2c03941 CM |
1763 | |
1764 | handlers->sender(intf->send_info, smi_msg, priority); | |
1765 | rcu_read_unlock(); | |
1da177e4 LT |
1766 | |
1767 | return 0; | |
1768 | ||
1769 | out_err: | |
b2c03941 | 1770 | rcu_read_unlock(); |
1da177e4 LT |
1771 | ipmi_free_smi_msg(smi_msg); |
1772 | ipmi_free_recv_msg(recv_msg); | |
1773 | return rv; | |
1774 | } | |
1775 | ||
c14979b9 CM |
1776 | static int check_addr(ipmi_smi_t intf, |
1777 | struct ipmi_addr *addr, | |
1778 | unsigned char *saddr, | |
1779 | unsigned char *lun) | |
1780 | { | |
1781 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1782 | return -EINVAL; | |
1783 | *lun = intf->channels[addr->channel].lun; | |
1784 | *saddr = intf->channels[addr->channel].address; | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1da177e4 LT |
1788 | int ipmi_request_settime(ipmi_user_t user, |
1789 | struct ipmi_addr *addr, | |
1790 | long msgid, | |
1791 | struct kernel_ipmi_msg *msg, | |
1792 | void *user_msg_data, | |
1793 | int priority, | |
1794 | int retries, | |
1795 | unsigned int retry_time_ms) | |
1796 | { | |
c14979b9 CM |
1797 | unsigned char saddr, lun; |
1798 | int rv; | |
1799 | ||
8a3628d5 | 1800 | if (!user) |
56a55ec6 | 1801 | return -EINVAL; |
c14979b9 CM |
1802 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1803 | if (rv) | |
1804 | return rv; | |
1da177e4 LT |
1805 | return i_ipmi_request(user, |
1806 | user->intf, | |
1807 | addr, | |
1808 | msgid, | |
1809 | msg, | |
1810 | user_msg_data, | |
1811 | NULL, NULL, | |
1812 | priority, | |
c14979b9 CM |
1813 | saddr, |
1814 | lun, | |
1da177e4 LT |
1815 | retries, |
1816 | retry_time_ms); | |
1817 | } | |
c70d7499 | 1818 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
1819 | |
1820 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1821 | struct ipmi_addr *addr, | |
1822 | long msgid, | |
1823 | struct kernel_ipmi_msg *msg, | |
1824 | void *user_msg_data, | |
1825 | void *supplied_smi, | |
1826 | struct ipmi_recv_msg *supplied_recv, | |
1827 | int priority) | |
1828 | { | |
c14979b9 CM |
1829 | unsigned char saddr, lun; |
1830 | int rv; | |
1831 | ||
8a3628d5 | 1832 | if (!user) |
56a55ec6 | 1833 | return -EINVAL; |
c14979b9 CM |
1834 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1835 | if (rv) | |
1836 | return rv; | |
1da177e4 LT |
1837 | return i_ipmi_request(user, |
1838 | user->intf, | |
1839 | addr, | |
1840 | msgid, | |
1841 | msg, | |
1842 | user_msg_data, | |
1843 | supplied_smi, | |
1844 | supplied_recv, | |
1845 | priority, | |
c14979b9 CM |
1846 | saddr, |
1847 | lun, | |
1da177e4 LT |
1848 | -1, 0); |
1849 | } | |
c70d7499 | 1850 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 1851 | |
1aa16eea | 1852 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1853 | static int ipmb_file_read_proc(char *page, char **start, off_t off, |
1854 | int count, int *eof, void *data) | |
1855 | { | |
1856 | char *out = (char *) page; | |
1857 | ipmi_smi_t intf = data; | |
c14979b9 | 1858 | int i; |
8a3628d5 | 1859 | int rv = 0; |
1da177e4 | 1860 | |
e8b33617 | 1861 | for (i = 0; i < IPMI_MAX_CHANNELS; i++) |
c14979b9 CM |
1862 | rv += sprintf(out+rv, "%x ", intf->channels[i].address); |
1863 | out[rv-1] = '\n'; /* Replace the final space with a newline */ | |
1864 | out[rv] = '\0'; | |
1865 | rv++; | |
1866 | return rv; | |
1da177e4 LT |
1867 | } |
1868 | ||
1869 | static int version_file_read_proc(char *page, char **start, off_t off, | |
1870 | int count, int *eof, void *data) | |
1871 | { | |
1872 | char *out = (char *) page; | |
1873 | ipmi_smi_t intf = data; | |
1874 | ||
b2655f26 | 1875 | return sprintf(out, "%u.%u\n", |
50c812b2 CM |
1876 | ipmi_version_major(&intf->bmc->id), |
1877 | ipmi_version_minor(&intf->bmc->id)); | |
1da177e4 LT |
1878 | } |
1879 | ||
1880 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
1881 | int count, int *eof, void *data) | |
1882 | { | |
1883 | char *out = (char *) page; | |
1884 | ipmi_smi_t intf = data; | |
1885 | ||
b2655f26 KB |
1886 | out += sprintf(out, "sent_invalid_commands: %u\n", |
1887 | ipmi_get_stat(intf, sent_invalid_commands)); | |
1888 | out += sprintf(out, "sent_local_commands: %u\n", | |
1889 | ipmi_get_stat(intf, sent_local_commands)); | |
1890 | out += sprintf(out, "handled_local_responses: %u\n", | |
1891 | ipmi_get_stat(intf, handled_local_responses)); | |
1892 | out += sprintf(out, "unhandled_local_responses: %u\n", | |
1893 | ipmi_get_stat(intf, unhandled_local_responses)); | |
1894 | out += sprintf(out, "sent_ipmb_commands: %u\n", | |
1895 | ipmi_get_stat(intf, sent_ipmb_commands)); | |
1896 | out += sprintf(out, "sent_ipmb_command_errs: %u\n", | |
1897 | ipmi_get_stat(intf, sent_ipmb_command_errs)); | |
1898 | out += sprintf(out, "retransmitted_ipmb_commands: %u\n", | |
1899 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); | |
1900 | out += sprintf(out, "timed_out_ipmb_commands: %u\n", | |
1901 | ipmi_get_stat(intf, timed_out_ipmb_commands)); | |
1902 | out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n", | |
1903 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); | |
1904 | out += sprintf(out, "sent_ipmb_responses: %u\n", | |
1905 | ipmi_get_stat(intf, sent_ipmb_responses)); | |
1906 | out += sprintf(out, "handled_ipmb_responses: %u\n", | |
1907 | ipmi_get_stat(intf, handled_ipmb_responses)); | |
1908 | out += sprintf(out, "invalid_ipmb_responses: %u\n", | |
1909 | ipmi_get_stat(intf, invalid_ipmb_responses)); | |
1910 | out += sprintf(out, "unhandled_ipmb_responses: %u\n", | |
1911 | ipmi_get_stat(intf, unhandled_ipmb_responses)); | |
1912 | out += sprintf(out, "sent_lan_commands: %u\n", | |
1913 | ipmi_get_stat(intf, sent_lan_commands)); | |
1914 | out += sprintf(out, "sent_lan_command_errs: %u\n", | |
1915 | ipmi_get_stat(intf, sent_lan_command_errs)); | |
1916 | out += sprintf(out, "retransmitted_lan_commands: %u\n", | |
1917 | ipmi_get_stat(intf, retransmitted_lan_commands)); | |
1918 | out += sprintf(out, "timed_out_lan_commands: %u\n", | |
1919 | ipmi_get_stat(intf, timed_out_lan_commands)); | |
1920 | out += sprintf(out, "sent_lan_responses: %u\n", | |
1921 | ipmi_get_stat(intf, sent_lan_responses)); | |
1922 | out += sprintf(out, "handled_lan_responses: %u\n", | |
1923 | ipmi_get_stat(intf, handled_lan_responses)); | |
1924 | out += sprintf(out, "invalid_lan_responses: %u\n", | |
1925 | ipmi_get_stat(intf, invalid_lan_responses)); | |
1926 | out += sprintf(out, "unhandled_lan_responses: %u\n", | |
1927 | ipmi_get_stat(intf, unhandled_lan_responses)); | |
1928 | out += sprintf(out, "handled_commands: %u\n", | |
1929 | ipmi_get_stat(intf, handled_commands)); | |
1930 | out += sprintf(out, "invalid_commands: %u\n", | |
1931 | ipmi_get_stat(intf, invalid_commands)); | |
1932 | out += sprintf(out, "unhandled_commands: %u\n", | |
1933 | ipmi_get_stat(intf, unhandled_commands)); | |
1934 | out += sprintf(out, "invalid_events: %u\n", | |
1935 | ipmi_get_stat(intf, invalid_events)); | |
1936 | out += sprintf(out, "events: %u\n", | |
1937 | ipmi_get_stat(intf, events)); | |
1da177e4 LT |
1938 | |
1939 | return (out - ((char *) page)); | |
1940 | } | |
1aa16eea | 1941 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1942 | |
1943 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
fa68be0d | 1944 | read_proc_t *read_proc, |
1da177e4 LT |
1945 | void *data, struct module *owner) |
1946 | { | |
1da177e4 | 1947 | int rv = 0; |
3b625943 CM |
1948 | #ifdef CONFIG_PROC_FS |
1949 | struct proc_dir_entry *file; | |
1da177e4 LT |
1950 | struct ipmi_proc_entry *entry; |
1951 | ||
1952 | /* Create a list element. */ | |
1953 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
1954 | if (!entry) | |
1955 | return -ENOMEM; | |
1956 | entry->name = kmalloc(strlen(name)+1, GFP_KERNEL); | |
1957 | if (!entry->name) { | |
1958 | kfree(entry); | |
1959 | return -ENOMEM; | |
1960 | } | |
1961 | strcpy(entry->name, name); | |
1962 | ||
1963 | file = create_proc_entry(name, 0, smi->proc_dir); | |
1964 | if (!file) { | |
1965 | kfree(entry->name); | |
1966 | kfree(entry); | |
1967 | rv = -ENOMEM; | |
1968 | } else { | |
1da177e4 LT |
1969 | file->data = data; |
1970 | file->read_proc = read_proc; | |
1da177e4 LT |
1971 | file->owner = owner; |
1972 | ||
ac019151 | 1973 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1974 | /* Stick it on the list. */ |
1975 | entry->next = smi->proc_entries; | |
1976 | smi->proc_entries = entry; | |
ac019151 | 1977 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 1978 | } |
3b625943 | 1979 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1980 | |
1981 | return rv; | |
1982 | } | |
c70d7499 | 1983 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
1984 | |
1985 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
1986 | { | |
1987 | int rv = 0; | |
1988 | ||
3b625943 | 1989 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1990 | sprintf(smi->proc_dir_name, "%d", num); |
1991 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
1992 | if (!smi->proc_dir) | |
1993 | rv = -ENOMEM; | |
c70d7499 | 1994 | else |
1da177e4 | 1995 | smi->proc_dir->owner = THIS_MODULE; |
1da177e4 LT |
1996 | |
1997 | if (rv == 0) | |
1998 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
fa68be0d | 1999 | stat_file_read_proc, |
1da177e4 LT |
2000 | smi, THIS_MODULE); |
2001 | ||
2002 | if (rv == 0) | |
2003 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
fa68be0d | 2004 | ipmb_file_read_proc, |
1da177e4 LT |
2005 | smi, THIS_MODULE); |
2006 | ||
2007 | if (rv == 0) | |
2008 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
fa68be0d | 2009 | version_file_read_proc, |
1da177e4 | 2010 | smi, THIS_MODULE); |
3b625943 | 2011 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2012 | |
2013 | return rv; | |
2014 | } | |
2015 | ||
2016 | static void remove_proc_entries(ipmi_smi_t smi) | |
2017 | { | |
3b625943 | 2018 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2019 | struct ipmi_proc_entry *entry; |
2020 | ||
ac019151 | 2021 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2022 | while (smi->proc_entries) { |
2023 | entry = smi->proc_entries; | |
2024 | smi->proc_entries = entry->next; | |
2025 | ||
2026 | remove_proc_entry(entry->name, smi->proc_dir); | |
2027 | kfree(entry->name); | |
2028 | kfree(entry); | |
2029 | } | |
ac019151 | 2030 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2031 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2032 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2033 | } |
2034 | ||
50c812b2 CM |
2035 | static int __find_bmc_guid(struct device *dev, void *data) |
2036 | { | |
2037 | unsigned char *id = data; | |
2038 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2039 | return memcmp(bmc->guid, id, 16) == 0; | |
2040 | } | |
2041 | ||
2042 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2043 | unsigned char *guid) | |
2044 | { | |
2045 | struct device *dev; | |
2046 | ||
2047 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2048 | if (dev) | |
2049 | return dev_get_drvdata(dev); | |
2050 | else | |
2051 | return NULL; | |
2052 | } | |
2053 | ||
2054 | struct prod_dev_id { | |
2055 | unsigned int product_id; | |
2056 | unsigned char device_id; | |
2057 | }; | |
2058 | ||
2059 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2060 | { | |
2061 | struct prod_dev_id *id = data; | |
2062 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2063 | ||
2064 | return (bmc->id.product_id == id->product_id | |
50c812b2 CM |
2065 | && bmc->id.device_id == id->device_id); |
2066 | } | |
2067 | ||
2068 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2069 | struct device_driver *drv, | |
f0b55da0 | 2070 | unsigned int product_id, unsigned char device_id) |
50c812b2 CM |
2071 | { |
2072 | struct prod_dev_id id = { | |
2073 | .product_id = product_id, | |
2074 | .device_id = device_id, | |
2075 | }; | |
2076 | struct device *dev; | |
2077 | ||
2078 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2079 | if (dev) | |
2080 | return dev_get_drvdata(dev); | |
2081 | else | |
2082 | return NULL; | |
2083 | } | |
2084 | ||
2085 | static ssize_t device_id_show(struct device *dev, | |
2086 | struct device_attribute *attr, | |
2087 | char *buf) | |
2088 | { | |
2089 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2090 | ||
2091 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2092 | } | |
2093 | ||
2094 | static ssize_t provides_dev_sdrs_show(struct device *dev, | |
2095 | struct device_attribute *attr, | |
2096 | char *buf) | |
2097 | { | |
2098 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2099 | ||
2100 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2101 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 CM |
2102 | } |
2103 | ||
2104 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2105 | char *buf) | |
2106 | { | |
2107 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2108 | ||
2109 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2110 | bmc->id.device_revision & 0x0F); |
50c812b2 CM |
2111 | } |
2112 | ||
2113 | static ssize_t firmware_rev_show(struct device *dev, | |
2114 | struct device_attribute *attr, | |
2115 | char *buf) | |
2116 | { | |
2117 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2118 | ||
2119 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2120 | bmc->id.firmware_revision_2); | |
2121 | } | |
2122 | ||
2123 | static ssize_t ipmi_version_show(struct device *dev, | |
2124 | struct device_attribute *attr, | |
2125 | char *buf) | |
2126 | { | |
2127 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2128 | ||
2129 | return snprintf(buf, 20, "%u.%u\n", | |
2130 | ipmi_version_major(&bmc->id), | |
2131 | ipmi_version_minor(&bmc->id)); | |
2132 | } | |
2133 | ||
2134 | static ssize_t add_dev_support_show(struct device *dev, | |
2135 | struct device_attribute *attr, | |
2136 | char *buf) | |
2137 | { | |
2138 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2139 | ||
2140 | return snprintf(buf, 10, "0x%02x\n", | |
2141 | bmc->id.additional_device_support); | |
2142 | } | |
2143 | ||
2144 | static ssize_t manufacturer_id_show(struct device *dev, | |
2145 | struct device_attribute *attr, | |
2146 | char *buf) | |
2147 | { | |
2148 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2149 | ||
2150 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2151 | } | |
2152 | ||
2153 | static ssize_t product_id_show(struct device *dev, | |
2154 | struct device_attribute *attr, | |
2155 | char *buf) | |
2156 | { | |
2157 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2158 | ||
2159 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2160 | } | |
2161 | ||
2162 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2163 | struct device_attribute *attr, | |
2164 | char *buf) | |
2165 | { | |
2166 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2167 | ||
2168 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2169 | bmc->id.aux_firmware_revision[3], | |
2170 | bmc->id.aux_firmware_revision[2], | |
2171 | bmc->id.aux_firmware_revision[1], | |
2172 | bmc->id.aux_firmware_revision[0]); | |
2173 | } | |
2174 | ||
2175 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2176 | char *buf) | |
2177 | { | |
2178 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2179 | ||
2180 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2181 | (long long) bmc->guid[0], | |
2182 | (long long) bmc->guid[8]); | |
2183 | } | |
2184 | ||
5e59393e | 2185 | static void remove_files(struct bmc_device *bmc) |
50c812b2 | 2186 | { |
f0b55da0 CM |
2187 | if (!bmc->dev) |
2188 | return; | |
2189 | ||
50c812b2 CM |
2190 | device_remove_file(&bmc->dev->dev, |
2191 | &bmc->device_id_attr); | |
2192 | device_remove_file(&bmc->dev->dev, | |
2193 | &bmc->provides_dev_sdrs_attr); | |
2194 | device_remove_file(&bmc->dev->dev, | |
2195 | &bmc->revision_attr); | |
2196 | device_remove_file(&bmc->dev->dev, | |
2197 | &bmc->firmware_rev_attr); | |
2198 | device_remove_file(&bmc->dev->dev, | |
2199 | &bmc->version_attr); | |
2200 | device_remove_file(&bmc->dev->dev, | |
2201 | &bmc->add_dev_support_attr); | |
2202 | device_remove_file(&bmc->dev->dev, | |
2203 | &bmc->manufacturer_id_attr); | |
2204 | device_remove_file(&bmc->dev->dev, | |
2205 | &bmc->product_id_attr); | |
5e59393e | 2206 | |
50c812b2 CM |
2207 | if (bmc->id.aux_firmware_revision_set) |
2208 | device_remove_file(&bmc->dev->dev, | |
2209 | &bmc->aux_firmware_rev_attr); | |
2210 | if (bmc->guid_set) | |
2211 | device_remove_file(&bmc->dev->dev, | |
2212 | &bmc->guid_attr); | |
5e59393e JG |
2213 | } |
2214 | ||
2215 | static void | |
2216 | cleanup_bmc_device(struct kref *ref) | |
2217 | { | |
2218 | struct bmc_device *bmc; | |
2219 | ||
2220 | bmc = container_of(ref, struct bmc_device, refcount); | |
2221 | ||
2222 | remove_files(bmc); | |
1d5636cc | 2223 | platform_device_unregister(bmc->dev); |
50c812b2 CM |
2224 | kfree(bmc); |
2225 | } | |
2226 | ||
2227 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2228 | { | |
2229 | struct bmc_device *bmc = intf->bmc; | |
2230 | ||
759643b8 CM |
2231 | if (intf->sysfs_name) { |
2232 | sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name); | |
2233 | kfree(intf->sysfs_name); | |
2234 | intf->sysfs_name = NULL; | |
2235 | } | |
50c812b2 CM |
2236 | if (intf->my_dev_name) { |
2237 | sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name); | |
2238 | kfree(intf->my_dev_name); | |
2239 | intf->my_dev_name = NULL; | |
2240 | } | |
2241 | ||
2242 | mutex_lock(&ipmidriver_mutex); | |
2243 | kref_put(&bmc->refcount, cleanup_bmc_device); | |
f0b55da0 | 2244 | intf->bmc = NULL; |
50c812b2 CM |
2245 | mutex_unlock(&ipmidriver_mutex); |
2246 | } | |
2247 | ||
5e59393e JG |
2248 | static int create_files(struct bmc_device *bmc) |
2249 | { | |
2250 | int err; | |
2251 | ||
f0b55da0 | 2252 | bmc->device_id_attr.attr.name = "device_id"; |
f0b55da0 CM |
2253 | bmc->device_id_attr.attr.mode = S_IRUGO; |
2254 | bmc->device_id_attr.show = device_id_show; | |
2255 | ||
2256 | bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs"; | |
f0b55da0 CM |
2257 | bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO; |
2258 | bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show; | |
2259 | ||
2260 | bmc->revision_attr.attr.name = "revision"; | |
f0b55da0 CM |
2261 | bmc->revision_attr.attr.mode = S_IRUGO; |
2262 | bmc->revision_attr.show = revision_show; | |
2263 | ||
2264 | bmc->firmware_rev_attr.attr.name = "firmware_revision"; | |
f0b55da0 CM |
2265 | bmc->firmware_rev_attr.attr.mode = S_IRUGO; |
2266 | bmc->firmware_rev_attr.show = firmware_rev_show; | |
2267 | ||
2268 | bmc->version_attr.attr.name = "ipmi_version"; | |
f0b55da0 CM |
2269 | bmc->version_attr.attr.mode = S_IRUGO; |
2270 | bmc->version_attr.show = ipmi_version_show; | |
2271 | ||
2272 | bmc->add_dev_support_attr.attr.name = "additional_device_support"; | |
f0b55da0 CM |
2273 | bmc->add_dev_support_attr.attr.mode = S_IRUGO; |
2274 | bmc->add_dev_support_attr.show = add_dev_support_show; | |
2275 | ||
2276 | bmc->manufacturer_id_attr.attr.name = "manufacturer_id"; | |
f0b55da0 CM |
2277 | bmc->manufacturer_id_attr.attr.mode = S_IRUGO; |
2278 | bmc->manufacturer_id_attr.show = manufacturer_id_show; | |
2279 | ||
2280 | bmc->product_id_attr.attr.name = "product_id"; | |
f0b55da0 CM |
2281 | bmc->product_id_attr.attr.mode = S_IRUGO; |
2282 | bmc->product_id_attr.show = product_id_show; | |
2283 | ||
2284 | bmc->guid_attr.attr.name = "guid"; | |
f0b55da0 CM |
2285 | bmc->guid_attr.attr.mode = S_IRUGO; |
2286 | bmc->guid_attr.show = guid_show; | |
2287 | ||
2288 | bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision"; | |
f0b55da0 CM |
2289 | bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO; |
2290 | bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show; | |
2291 | ||
5e59393e JG |
2292 | err = device_create_file(&bmc->dev->dev, |
2293 | &bmc->device_id_attr); | |
c70d7499 CM |
2294 | if (err) |
2295 | goto out; | |
5e59393e JG |
2296 | err = device_create_file(&bmc->dev->dev, |
2297 | &bmc->provides_dev_sdrs_attr); | |
c70d7499 CM |
2298 | if (err) |
2299 | goto out_devid; | |
5e59393e JG |
2300 | err = device_create_file(&bmc->dev->dev, |
2301 | &bmc->revision_attr); | |
c70d7499 CM |
2302 | if (err) |
2303 | goto out_sdrs; | |
5e59393e JG |
2304 | err = device_create_file(&bmc->dev->dev, |
2305 | &bmc->firmware_rev_attr); | |
c70d7499 CM |
2306 | if (err) |
2307 | goto out_rev; | |
5e59393e JG |
2308 | err = device_create_file(&bmc->dev->dev, |
2309 | &bmc->version_attr); | |
c70d7499 CM |
2310 | if (err) |
2311 | goto out_firm; | |
5e59393e JG |
2312 | err = device_create_file(&bmc->dev->dev, |
2313 | &bmc->add_dev_support_attr); | |
c70d7499 CM |
2314 | if (err) |
2315 | goto out_version; | |
5e59393e JG |
2316 | err = device_create_file(&bmc->dev->dev, |
2317 | &bmc->manufacturer_id_attr); | |
c70d7499 CM |
2318 | if (err) |
2319 | goto out_add_dev; | |
5e59393e JG |
2320 | err = device_create_file(&bmc->dev->dev, |
2321 | &bmc->product_id_attr); | |
c70d7499 CM |
2322 | if (err) |
2323 | goto out_manu; | |
5e59393e JG |
2324 | if (bmc->id.aux_firmware_revision_set) { |
2325 | err = device_create_file(&bmc->dev->dev, | |
2326 | &bmc->aux_firmware_rev_attr); | |
c70d7499 CM |
2327 | if (err) |
2328 | goto out_prod_id; | |
5e59393e JG |
2329 | } |
2330 | if (bmc->guid_set) { | |
2331 | err = device_create_file(&bmc->dev->dev, | |
2332 | &bmc->guid_attr); | |
c70d7499 CM |
2333 | if (err) |
2334 | goto out_aux_firm; | |
5e59393e JG |
2335 | } |
2336 | ||
2337 | return 0; | |
2338 | ||
2339 | out_aux_firm: | |
2340 | if (bmc->id.aux_firmware_revision_set) | |
2341 | device_remove_file(&bmc->dev->dev, | |
2342 | &bmc->aux_firmware_rev_attr); | |
2343 | out_prod_id: | |
2344 | device_remove_file(&bmc->dev->dev, | |
2345 | &bmc->product_id_attr); | |
2346 | out_manu: | |
2347 | device_remove_file(&bmc->dev->dev, | |
2348 | &bmc->manufacturer_id_attr); | |
2349 | out_add_dev: | |
2350 | device_remove_file(&bmc->dev->dev, | |
2351 | &bmc->add_dev_support_attr); | |
2352 | out_version: | |
2353 | device_remove_file(&bmc->dev->dev, | |
2354 | &bmc->version_attr); | |
2355 | out_firm: | |
2356 | device_remove_file(&bmc->dev->dev, | |
2357 | &bmc->firmware_rev_attr); | |
2358 | out_rev: | |
2359 | device_remove_file(&bmc->dev->dev, | |
2360 | &bmc->revision_attr); | |
2361 | out_sdrs: | |
2362 | device_remove_file(&bmc->dev->dev, | |
2363 | &bmc->provides_dev_sdrs_attr); | |
2364 | out_devid: | |
2365 | device_remove_file(&bmc->dev->dev, | |
2366 | &bmc->device_id_attr); | |
2367 | out: | |
2368 | return err; | |
2369 | } | |
2370 | ||
759643b8 CM |
2371 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum, |
2372 | const char *sysfs_name) | |
50c812b2 CM |
2373 | { |
2374 | int rv; | |
2375 | struct bmc_device *bmc = intf->bmc; | |
2376 | struct bmc_device *old_bmc; | |
2377 | int size; | |
2378 | char dummy[1]; | |
2379 | ||
2380 | mutex_lock(&ipmidriver_mutex); | |
2381 | ||
2382 | /* | |
2383 | * Try to find if there is an bmc_device struct | |
2384 | * representing the interfaced BMC already | |
2385 | */ | |
2386 | if (bmc->guid_set) | |
2387 | old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid); | |
2388 | else | |
2389 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver, | |
2390 | bmc->id.product_id, | |
2391 | bmc->id.device_id); | |
2392 | ||
2393 | /* | |
2394 | * If there is already an bmc_device, free the new one, | |
2395 | * otherwise register the new BMC device | |
2396 | */ | |
2397 | if (old_bmc) { | |
2398 | kfree(bmc); | |
2399 | intf->bmc = old_bmc; | |
2400 | bmc = old_bmc; | |
2401 | ||
2402 | kref_get(&bmc->refcount); | |
2403 | mutex_unlock(&ipmidriver_mutex); | |
2404 | ||
2405 | printk(KERN_INFO | |
2406 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2407 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2408 | bmc->id.manufacturer_id, | |
2409 | bmc->id.product_id, | |
2410 | bmc->id.device_id); | |
2411 | } else { | |
f0b55da0 CM |
2412 | char name[14]; |
2413 | unsigned char orig_dev_id = bmc->id.device_id; | |
2414 | int warn_printed = 0; | |
2415 | ||
2416 | snprintf(name, sizeof(name), | |
2417 | "ipmi_bmc.%4.4x", bmc->id.product_id); | |
2418 | ||
2419 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver, | |
2420 | bmc->id.product_id, | |
1d5636cc | 2421 | bmc->id.device_id)) { |
f0b55da0 CM |
2422 | if (!warn_printed) { |
2423 | printk(KERN_WARNING PFX | |
2424 | "This machine has two different BMCs" | |
2425 | " with the same product id and device" | |
2426 | " id. This is an error in the" | |
2427 | " firmware, but incrementing the" | |
2428 | " device id to work around the problem." | |
2429 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2430 | bmc->id.product_id, bmc->id.device_id); | |
2431 | warn_printed = 1; | |
2432 | } | |
2433 | bmc->id.device_id++; /* Wraps at 255 */ | |
2434 | if (bmc->id.device_id == orig_dev_id) { | |
2435 | printk(KERN_ERR PFX | |
2436 | "Out of device ids!\n"); | |
2437 | break; | |
2438 | } | |
2439 | } | |
2440 | ||
2441 | bmc->dev = platform_device_alloc(name, bmc->id.device_id); | |
8a3628d5 | 2442 | if (!bmc->dev) { |
f0b55da0 | 2443 | mutex_unlock(&ipmidriver_mutex); |
50c812b2 CM |
2444 | printk(KERN_ERR |
2445 | "ipmi_msghandler:" | |
2446 | " Unable to allocate platform device\n"); | |
2447 | return -ENOMEM; | |
2448 | } | |
2449 | bmc->dev->dev.driver = &ipmidriver; | |
2450 | dev_set_drvdata(&bmc->dev->dev, bmc); | |
2451 | kref_init(&bmc->refcount); | |
2452 | ||
b48f5457 | 2453 | rv = platform_device_add(bmc->dev); |
50c812b2 CM |
2454 | mutex_unlock(&ipmidriver_mutex); |
2455 | if (rv) { | |
f0b55da0 CM |
2456 | platform_device_put(bmc->dev); |
2457 | bmc->dev = NULL; | |
50c812b2 CM |
2458 | printk(KERN_ERR |
2459 | "ipmi_msghandler:" | |
2460 | " Unable to register bmc device: %d\n", | |
2461 | rv); | |
c70d7499 CM |
2462 | /* |
2463 | * Don't go to out_err, you can only do that if | |
2464 | * the device is registered already. | |
2465 | */ | |
50c812b2 CM |
2466 | return rv; |
2467 | } | |
2468 | ||
5e59393e JG |
2469 | rv = create_files(bmc); |
2470 | if (rv) { | |
2471 | mutex_lock(&ipmidriver_mutex); | |
2472 | platform_device_unregister(bmc->dev); | |
2473 | mutex_unlock(&ipmidriver_mutex); | |
2474 | ||
2475 | return rv; | |
2476 | } | |
50c812b2 CM |
2477 | |
2478 | printk(KERN_INFO | |
2479 | "ipmi: Found new BMC (man_id: 0x%6.6x, " | |
2480 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2481 | bmc->id.manufacturer_id, | |
2482 | bmc->id.product_id, | |
2483 | bmc->id.device_id); | |
2484 | } | |
2485 | ||
2486 | /* | |
2487 | * create symlink from system interface device to bmc device | |
2488 | * and back. | |
2489 | */ | |
759643b8 CM |
2490 | intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL); |
2491 | if (!intf->sysfs_name) { | |
2492 | rv = -ENOMEM; | |
2493 | printk(KERN_ERR | |
2494 | "ipmi_msghandler: allocate link to BMC: %d\n", | |
2495 | rv); | |
2496 | goto out_err; | |
2497 | } | |
2498 | ||
50c812b2 | 2499 | rv = sysfs_create_link(&intf->si_dev->kobj, |
759643b8 | 2500 | &bmc->dev->dev.kobj, intf->sysfs_name); |
50c812b2 | 2501 | if (rv) { |
759643b8 CM |
2502 | kfree(intf->sysfs_name); |
2503 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2504 | printk(KERN_ERR |
2505 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2506 | rv); | |
2507 | goto out_err; | |
2508 | } | |
2509 | ||
759643b8 | 2510 | size = snprintf(dummy, 0, "ipmi%d", ifnum); |
50c812b2 CM |
2511 | intf->my_dev_name = kmalloc(size+1, GFP_KERNEL); |
2512 | if (!intf->my_dev_name) { | |
759643b8 CM |
2513 | kfree(intf->sysfs_name); |
2514 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2515 | rv = -ENOMEM; |
2516 | printk(KERN_ERR | |
2517 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2518 | rv); | |
2519 | goto out_err; | |
2520 | } | |
759643b8 | 2521 | snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum); |
50c812b2 CM |
2522 | |
2523 | rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj, | |
2524 | intf->my_dev_name); | |
2525 | if (rv) { | |
759643b8 CM |
2526 | kfree(intf->sysfs_name); |
2527 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2528 | kfree(intf->my_dev_name); |
2529 | intf->my_dev_name = NULL; | |
2530 | printk(KERN_ERR | |
2531 | "ipmi_msghandler:" | |
2532 | " Unable to create symlink to bmc: %d\n", | |
2533 | rv); | |
2534 | goto out_err; | |
2535 | } | |
2536 | ||
2537 | return 0; | |
2538 | ||
2539 | out_err: | |
2540 | ipmi_bmc_unregister(intf); | |
2541 | return rv; | |
2542 | } | |
2543 | ||
2544 | static int | |
2545 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2546 | { | |
2547 | struct kernel_ipmi_msg msg; | |
2548 | struct ipmi_system_interface_addr si; | |
2549 | ||
2550 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2551 | si.channel = IPMI_BMC_CHANNEL; | |
2552 | si.lun = 0; | |
2553 | ||
2554 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2555 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2556 | msg.data = NULL; | |
2557 | msg.data_len = 0; | |
2558 | return i_ipmi_request(NULL, | |
2559 | intf, | |
2560 | (struct ipmi_addr *) &si, | |
2561 | 0, | |
2562 | &msg, | |
2563 | intf, | |
2564 | NULL, | |
2565 | NULL, | |
2566 | 0, | |
2567 | intf->channels[0].address, | |
2568 | intf->channels[0].lun, | |
2569 | -1, 0); | |
2570 | } | |
2571 | ||
2572 | static void | |
2573 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2574 | { | |
2575 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2576 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2577 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2578 | /* Not for me */ | |
2579 | return; | |
2580 | ||
2581 | if (msg->msg.data[0] != 0) { | |
2582 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2583 | intf->bmc->guid_set = 0; | |
2584 | goto out; | |
2585 | } | |
2586 | ||
2587 | if (msg->msg.data_len < 17) { | |
2588 | intf->bmc->guid_set = 0; | |
2589 | printk(KERN_WARNING PFX | |
2590 | "guid_handler: The GUID response from the BMC was too" | |
2591 | " short, it was %d but should have been 17. Assuming" | |
2592 | " GUID is not available.\n", | |
2593 | msg->msg.data_len); | |
2594 | goto out; | |
2595 | } | |
2596 | ||
2597 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2598 | intf->bmc->guid_set = 1; | |
2599 | out: | |
2600 | wake_up(&intf->waitq); | |
2601 | } | |
2602 | ||
2603 | static void | |
2604 | get_guid(ipmi_smi_t intf) | |
2605 | { | |
2606 | int rv; | |
2607 | ||
2608 | intf->bmc->guid_set = 0x2; | |
2609 | intf->null_user_handler = guid_handler; | |
2610 | rv = send_guid_cmd(intf, 0); | |
2611 | if (rv) | |
2612 | /* Send failed, no GUID available. */ | |
2613 | intf->bmc->guid_set = 0; | |
2614 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2615 | intf->null_user_handler = NULL; | |
2616 | } | |
2617 | ||
1da177e4 LT |
2618 | static int |
2619 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2620 | { | |
2621 | struct kernel_ipmi_msg msg; | |
2622 | unsigned char data[1]; | |
2623 | struct ipmi_system_interface_addr si; | |
2624 | ||
2625 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2626 | si.channel = IPMI_BMC_CHANNEL; | |
2627 | si.lun = 0; | |
2628 | ||
2629 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2630 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2631 | msg.data = data; | |
2632 | msg.data_len = 1; | |
2633 | data[0] = chan; | |
2634 | return i_ipmi_request(NULL, | |
2635 | intf, | |
2636 | (struct ipmi_addr *) &si, | |
2637 | 0, | |
2638 | &msg, | |
56a55ec6 | 2639 | intf, |
1da177e4 LT |
2640 | NULL, |
2641 | NULL, | |
2642 | 0, | |
c14979b9 CM |
2643 | intf->channels[0].address, |
2644 | intf->channels[0].lun, | |
1da177e4 LT |
2645 | -1, 0); |
2646 | } | |
2647 | ||
2648 | static void | |
56a55ec6 | 2649 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2650 | { |
2651 | int rv = 0; | |
2652 | int chan; | |
2653 | ||
56a55ec6 CM |
2654 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2655 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2656 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2657 | /* It's the one we want */ |
56a55ec6 | 2658 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2659 | /* Got an error from the channel, just go on. */ |
2660 | ||
56a55ec6 | 2661 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2662 | /* |
2663 | * If the MC does not support this | |
2664 | * command, that is legal. We just | |
2665 | * assume it has one IPMB at channel | |
2666 | * zero. | |
2667 | */ | |
1da177e4 LT |
2668 | intf->channels[0].medium |
2669 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2670 | intf->channels[0].protocol | |
2671 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
2672 | rv = -ENOSYS; | |
2673 | ||
2674 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2675 | wake_up(&intf->waitq); | |
2676 | goto out; | |
2677 | } | |
2678 | goto next_channel; | |
2679 | } | |
56a55ec6 | 2680 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2681 | /* Message not big enough, just go on. */ |
2682 | goto next_channel; | |
2683 | } | |
2684 | chan = intf->curr_channel; | |
56a55ec6 CM |
2685 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2686 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2687 | |
c70d7499 | 2688 | next_channel: |
1da177e4 LT |
2689 | intf->curr_channel++; |
2690 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2691 | wake_up(&intf->waitq); | |
2692 | else | |
2693 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2694 | ||
2695 | if (rv) { | |
2696 | /* Got an error somehow, just give up. */ | |
2697 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2698 | wake_up(&intf->waitq); | |
2699 | ||
2700 | printk(KERN_WARNING PFX | |
2701 | "Error sending channel information: %d\n", | |
2702 | rv); | |
2703 | } | |
2704 | } | |
2705 | out: | |
2706 | return; | |
2707 | } | |
2708 | ||
fcfa4724 CM |
2709 | void ipmi_poll_interface(ipmi_user_t user) |
2710 | { | |
2711 | ipmi_smi_t intf = user->intf; | |
2712 | ||
2713 | if (intf->handlers->poll) | |
2714 | intf->handlers->poll(intf->send_info); | |
2715 | } | |
c70d7499 | 2716 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2717 | |
1da177e4 LT |
2718 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, |
2719 | void *send_info, | |
50c812b2 CM |
2720 | struct ipmi_device_id *device_id, |
2721 | struct device *si_dev, | |
759643b8 | 2722 | const char *sysfs_name, |
453823ba | 2723 | unsigned char slave_addr) |
1da177e4 LT |
2724 | { |
2725 | int i, j; | |
2726 | int rv; | |
393d2cc3 | 2727 | ipmi_smi_t intf; |
bca0324d | 2728 | ipmi_smi_t tintf; |
bca0324d | 2729 | struct list_head *link; |
1da177e4 | 2730 | |
c70d7499 CM |
2731 | /* |
2732 | * Make sure the driver is actually initialized, this handles | |
2733 | * problems with initialization order. | |
2734 | */ | |
1da177e4 LT |
2735 | if (!initialized) { |
2736 | rv = ipmi_init_msghandler(); | |
2737 | if (rv) | |
2738 | return rv; | |
c70d7499 CM |
2739 | /* |
2740 | * The init code doesn't return an error if it was turned | |
2741 | * off, but it won't initialize. Check that. | |
2742 | */ | |
1da177e4 LT |
2743 | if (!initialized) |
2744 | return -ENODEV; | |
2745 | } | |
2746 | ||
dd00cc48 | 2747 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2748 | if (!intf) |
1da177e4 | 2749 | return -ENOMEM; |
b2c03941 CM |
2750 | |
2751 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2752 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2753 | ||
50c812b2 CM |
2754 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2755 | if (!intf->bmc) { | |
2756 | kfree(intf); | |
2757 | return -ENOMEM; | |
2758 | } | |
bca0324d | 2759 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2760 | kref_init(&intf->refcount); |
50c812b2 CM |
2761 | intf->bmc->id = *device_id; |
2762 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2763 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2764 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2765 | intf->channels[j].lun = 2; | |
2766 | } | |
2767 | if (slave_addr != 0) | |
2768 | intf->channels[0].address = slave_addr; | |
2769 | INIT_LIST_HEAD(&intf->users); | |
2770 | intf->handlers = handlers; | |
2771 | intf->send_info = send_info; | |
2772 | spin_lock_init(&intf->seq_lock); | |
2773 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2774 | intf->seq_table[j].inuse = 0; | |
2775 | intf->seq_table[j].seqid = 0; | |
2776 | } | |
2777 | intf->curr_seq = 0; | |
2778 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2779 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 CM |
2780 | #endif |
2781 | spin_lock_init(&intf->waiting_msgs_lock); | |
2782 | INIT_LIST_HEAD(&intf->waiting_msgs); | |
2783 | spin_lock_init(&intf->events_lock); | |
2784 | INIT_LIST_HEAD(&intf->waiting_events); | |
2785 | intf->waiting_events_count = 0; | |
d6dfd131 | 2786 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2787 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2788 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2789 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2790 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2791 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2792 | |
393d2cc3 | 2793 | intf->proc_dir = NULL; |
1da177e4 | 2794 | |
b2c03941 | 2795 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2796 | mutex_lock(&ipmi_interfaces_mutex); |
2797 | /* Look for a hole in the numbers. */ | |
2798 | i = 0; | |
2799 | link = &ipmi_interfaces; | |
2800 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2801 | if (tintf->intf_num != i) { | |
2802 | link = &tintf->link; | |
1da177e4 LT |
2803 | break; |
2804 | } | |
bca0324d | 2805 | i++; |
1da177e4 | 2806 | } |
bca0324d CM |
2807 | /* Add the new interface in numeric order. */ |
2808 | if (i == 0) | |
2809 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2810 | else | |
2811 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2812 | |
453823ba CM |
2813 | rv = handlers->start_processing(send_info, intf); |
2814 | if (rv) | |
2815 | goto out; | |
1da177e4 | 2816 | |
50c812b2 CM |
2817 | get_guid(intf); |
2818 | ||
b2c03941 | 2819 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2820 | || ((intf->ipmi_version_major == 1) |
2821 | && (intf->ipmi_version_minor >= 5))) { | |
2822 | /* | |
2823 | * Start scanning the channels to see what is | |
2824 | * available. | |
2825 | */ | |
393d2cc3 CM |
2826 | intf->null_user_handler = channel_handler; |
2827 | intf->curr_channel = 0; | |
2828 | rv = send_channel_info_cmd(intf, 0); | |
2829 | if (rv) | |
2830 | goto out; | |
1da177e4 | 2831 | |
393d2cc3 CM |
2832 | /* Wait for the channel info to be read. */ |
2833 | wait_event(intf->waitq, | |
2834 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2835 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2836 | } else { |
2837 | /* Assume a single IPMB channel at zero. */ | |
2838 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2839 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2840 | } |
2841 | ||
393d2cc3 CM |
2842 | if (rv == 0) |
2843 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2844 | |
759643b8 | 2845 | rv = ipmi_bmc_register(intf, i, sysfs_name); |
50c812b2 | 2846 | |
393d2cc3 | 2847 | out: |
1da177e4 | 2848 | if (rv) { |
393d2cc3 CM |
2849 | if (intf->proc_dir) |
2850 | remove_proc_entries(intf); | |
b2c03941 | 2851 | intf->handlers = NULL; |
bca0324d CM |
2852 | list_del_rcu(&intf->link); |
2853 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2854 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2855 | synchronize_rcu(); |
393d2cc3 | 2856 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2857 | } else { |
78ba2faf CM |
2858 | /* |
2859 | * Keep memory order straight for RCU readers. Make | |
2860 | * sure everything else is committed to memory before | |
2861 | * setting intf_num to mark the interface valid. | |
2862 | */ | |
2863 | smp_wmb(); | |
bca0324d CM |
2864 | intf->intf_num = i; |
2865 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 2866 | /* After this point the interface is legal to use. */ |
50c812b2 | 2867 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 2868 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
2869 | } |
2870 | ||
2871 | return rv; | |
2872 | } | |
c70d7499 | 2873 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 2874 | |
b2c03941 CM |
2875 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
2876 | { | |
2877 | int i; | |
2878 | struct seq_table *ent; | |
2879 | ||
2880 | /* No need for locks, the interface is down. */ | |
2881 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
2882 | ent = &(intf->seq_table[i]); | |
2883 | if (!ent->inuse) | |
2884 | continue; | |
2885 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
2886 | } | |
2887 | } | |
2888 | ||
1da177e4 LT |
2889 | int ipmi_unregister_smi(ipmi_smi_t intf) |
2890 | { | |
1da177e4 | 2891 | struct ipmi_smi_watcher *w; |
b2c03941 | 2892 | int intf_num = intf->intf_num; |
1da177e4 | 2893 | |
50c812b2 CM |
2894 | ipmi_bmc_unregister(intf); |
2895 | ||
b2c03941 | 2896 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 2897 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 CM |
2898 | intf->intf_num = -1; |
2899 | intf->handlers = NULL; | |
bca0324d CM |
2900 | list_del_rcu(&intf->link); |
2901 | mutex_unlock(&ipmi_interfaces_mutex); | |
2902 | synchronize_rcu(); | |
1da177e4 | 2903 | |
b2c03941 CM |
2904 | cleanup_smi_msgs(intf); |
2905 | ||
393d2cc3 | 2906 | remove_proc_entries(intf); |
1da177e4 | 2907 | |
c70d7499 CM |
2908 | /* |
2909 | * Call all the watcher interfaces to tell them that | |
2910 | * an interface is gone. | |
2911 | */ | |
393d2cc3 | 2912 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
2913 | w->smi_gone(intf_num); |
2914 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 2915 | |
393d2cc3 | 2916 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
2917 | return 0; |
2918 | } | |
c70d7499 | 2919 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
2920 | |
2921 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
2922 | struct ipmi_smi_msg *msg) | |
2923 | { | |
2924 | struct ipmi_ipmb_addr ipmb_addr; | |
2925 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 2926 | |
c70d7499 CM |
2927 | /* |
2928 | * This is 11, not 10, because the response must contain a | |
2929 | * completion code. | |
2930 | */ | |
1da177e4 LT |
2931 | if (msg->rsp_size < 11) { |
2932 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 2933 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
2934 | return 0; |
2935 | } | |
2936 | ||
2937 | if (msg->rsp[2] != 0) { | |
2938 | /* An error getting the response, just ignore it. */ | |
2939 | return 0; | |
2940 | } | |
2941 | ||
2942 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
2943 | ipmb_addr.slave_addr = msg->rsp[6]; | |
2944 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
2945 | ipmb_addr.lun = msg->rsp[7] & 3; | |
2946 | ||
c70d7499 CM |
2947 | /* |
2948 | * It's a response from a remote entity. Look up the sequence | |
2949 | * number and handle the response. | |
2950 | */ | |
1da177e4 LT |
2951 | if (intf_find_seq(intf, |
2952 | msg->rsp[7] >> 2, | |
2953 | msg->rsp[3] & 0x0f, | |
2954 | msg->rsp[8], | |
2955 | (msg->rsp[4] >> 2) & (~1), | |
2956 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
2957 | &recv_msg)) { |
2958 | /* | |
2959 | * We were unable to find the sequence number, | |
2960 | * so just nuke the message. | |
2961 | */ | |
b2655f26 | 2962 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
2963 | return 0; |
2964 | } | |
2965 | ||
2966 | memcpy(recv_msg->msg_data, | |
2967 | &(msg->rsp[9]), | |
2968 | msg->rsp_size - 9); | |
c70d7499 CM |
2969 | /* |
2970 | * The other fields matched, so no need to set them, except | |
2971 | * for netfn, which needs to be the response that was | |
2972 | * returned, not the request value. | |
2973 | */ | |
1da177e4 LT |
2974 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
2975 | recv_msg->msg.data = recv_msg->msg_data; | |
2976 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
2977 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 2978 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
2979 | deliver_response(recv_msg); |
2980 | ||
2981 | return 0; | |
2982 | } | |
2983 | ||
2984 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
2985 | struct ipmi_smi_msg *msg) | |
2986 | { | |
393d2cc3 CM |
2987 | struct cmd_rcvr *rcvr; |
2988 | int rv = 0; | |
2989 | unsigned char netfn; | |
2990 | unsigned char cmd; | |
c69c3127 | 2991 | unsigned char chan; |
393d2cc3 CM |
2992 | ipmi_user_t user = NULL; |
2993 | struct ipmi_ipmb_addr *ipmb_addr; | |
2994 | struct ipmi_recv_msg *recv_msg; | |
b2c03941 | 2995 | struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
2996 | |
2997 | if (msg->rsp_size < 10) { | |
2998 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 2999 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3000 | return 0; |
3001 | } | |
3002 | ||
3003 | if (msg->rsp[2] != 0) { | |
3004 | /* An error getting the response, just ignore it. */ | |
3005 | return 0; | |
3006 | } | |
3007 | ||
3008 | netfn = msg->rsp[4] >> 2; | |
3009 | cmd = msg->rsp[8]; | |
c69c3127 | 3010 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3011 | |
e61fb5b6 | 3012 | rcu_read_lock(); |
c69c3127 | 3013 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3014 | if (rcvr) { |
3015 | user = rcvr->user; | |
3016 | kref_get(&user->refcount); | |
3017 | } else | |
3018 | user = NULL; | |
e61fb5b6 | 3019 | rcu_read_unlock(); |
1da177e4 LT |
3020 | |
3021 | if (user == NULL) { | |
3022 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3023 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3024 | |
3025 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3026 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3027 | msg->data[2] = msg->rsp[3]; | |
3028 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3029 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3030 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3031 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3032 | /* rqseq/lun */ |
3033 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3034 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3035 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3036 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3037 | msg->data_size = 11; | |
3038 | ||
3039 | #ifdef DEBUG_MSGING | |
3040 | { | |
3041 | int m; | |
3042 | printk("Invalid command:"); | |
e8b33617 | 3043 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3044 | printk(" %2.2x", msg->data[m]); |
3045 | printk("\n"); | |
3046 | } | |
3047 | #endif | |
b2c03941 CM |
3048 | rcu_read_lock(); |
3049 | handlers = intf->handlers; | |
3050 | if (handlers) { | |
3051 | handlers->sender(intf->send_info, msg, 0); | |
c70d7499 CM |
3052 | /* |
3053 | * We used the message, so return the value | |
3054 | * that causes it to not be freed or | |
3055 | * queued. | |
3056 | */ | |
b2c03941 CM |
3057 | rv = -1; |
3058 | } | |
3059 | rcu_read_unlock(); | |
1da177e4 LT |
3060 | } else { |
3061 | /* Deliver the message to the user. */ | |
b2655f26 | 3062 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3063 | |
3064 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3065 | if (!recv_msg) { |
c70d7499 CM |
3066 | /* |
3067 | * We couldn't allocate memory for the | |
3068 | * message, so requeue it for handling | |
3069 | * later. | |
3070 | */ | |
1da177e4 | 3071 | rv = 1; |
393d2cc3 | 3072 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3073 | } else { |
3074 | /* Extract the source address from the data. */ | |
3075 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3076 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3077 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3078 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3079 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3080 | ||
c70d7499 CM |
3081 | /* |
3082 | * Extract the rest of the message information | |
3083 | * from the IPMB header. | |
3084 | */ | |
1da177e4 LT |
3085 | recv_msg->user = user; |
3086 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3087 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3088 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3089 | recv_msg->msg.cmd = msg->rsp[8]; | |
3090 | recv_msg->msg.data = recv_msg->msg_data; | |
3091 | ||
c70d7499 CM |
3092 | /* |
3093 | * We chop off 10, not 9 bytes because the checksum | |
3094 | * at the end also needs to be removed. | |
3095 | */ | |
1da177e4 LT |
3096 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3097 | memcpy(recv_msg->msg_data, | |
3098 | &(msg->rsp[9]), | |
3099 | msg->rsp_size - 10); | |
3100 | deliver_response(recv_msg); | |
3101 | } | |
3102 | } | |
3103 | ||
3104 | return rv; | |
3105 | } | |
3106 | ||
3107 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3108 | struct ipmi_smi_msg *msg) | |
3109 | { | |
3110 | struct ipmi_lan_addr lan_addr; | |
3111 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3112 | |
3113 | ||
c70d7499 CM |
3114 | /* |
3115 | * This is 13, not 12, because the response must contain a | |
3116 | * completion code. | |
3117 | */ | |
1da177e4 LT |
3118 | if (msg->rsp_size < 13) { |
3119 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3120 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3121 | return 0; |
3122 | } | |
3123 | ||
3124 | if (msg->rsp[2] != 0) { | |
3125 | /* An error getting the response, just ignore it. */ | |
3126 | return 0; | |
3127 | } | |
3128 | ||
3129 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3130 | lan_addr.session_handle = msg->rsp[4]; | |
3131 | lan_addr.remote_SWID = msg->rsp[8]; | |
3132 | lan_addr.local_SWID = msg->rsp[5]; | |
3133 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3134 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3135 | lan_addr.lun = msg->rsp[9] & 3; | |
3136 | ||
c70d7499 CM |
3137 | /* |
3138 | * It's a response from a remote entity. Look up the sequence | |
3139 | * number and handle the response. | |
3140 | */ | |
1da177e4 LT |
3141 | if (intf_find_seq(intf, |
3142 | msg->rsp[9] >> 2, | |
3143 | msg->rsp[3] & 0x0f, | |
3144 | msg->rsp[10], | |
3145 | (msg->rsp[6] >> 2) & (~1), | |
3146 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3147 | &recv_msg)) { |
3148 | /* | |
3149 | * We were unable to find the sequence number, | |
3150 | * so just nuke the message. | |
3151 | */ | |
b2655f26 | 3152 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3153 | return 0; |
3154 | } | |
3155 | ||
3156 | memcpy(recv_msg->msg_data, | |
3157 | &(msg->rsp[11]), | |
3158 | msg->rsp_size - 11); | |
c70d7499 CM |
3159 | /* |
3160 | * The other fields matched, so no need to set them, except | |
3161 | * for netfn, which needs to be the response that was | |
3162 | * returned, not the request value. | |
3163 | */ | |
1da177e4 LT |
3164 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3165 | recv_msg->msg.data = recv_msg->msg_data; | |
3166 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3167 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3168 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3169 | deliver_response(recv_msg); |
3170 | ||
3171 | return 0; | |
3172 | } | |
3173 | ||
3174 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3175 | struct ipmi_smi_msg *msg) | |
3176 | { | |
393d2cc3 CM |
3177 | struct cmd_rcvr *rcvr; |
3178 | int rv = 0; | |
3179 | unsigned char netfn; | |
3180 | unsigned char cmd; | |
c69c3127 | 3181 | unsigned char chan; |
393d2cc3 CM |
3182 | ipmi_user_t user = NULL; |
3183 | struct ipmi_lan_addr *lan_addr; | |
3184 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3185 | |
3186 | if (msg->rsp_size < 12) { | |
3187 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3188 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3189 | return 0; |
3190 | } | |
3191 | ||
3192 | if (msg->rsp[2] != 0) { | |
3193 | /* An error getting the response, just ignore it. */ | |
3194 | return 0; | |
3195 | } | |
3196 | ||
3197 | netfn = msg->rsp[6] >> 2; | |
3198 | cmd = msg->rsp[10]; | |
c69c3127 | 3199 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3200 | |
e61fb5b6 | 3201 | rcu_read_lock(); |
c69c3127 | 3202 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3203 | if (rcvr) { |
3204 | user = rcvr->user; | |
3205 | kref_get(&user->refcount); | |
3206 | } else | |
3207 | user = NULL; | |
e61fb5b6 | 3208 | rcu_read_unlock(); |
1da177e4 LT |
3209 | |
3210 | if (user == NULL) { | |
393d2cc3 | 3211 | /* We didn't find a user, just give up. */ |
b2655f26 | 3212 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3213 | |
c70d7499 CM |
3214 | /* |
3215 | * Don't do anything with these messages, just allow | |
3216 | * them to be freed. | |
3217 | */ | |
3218 | rv = 0; | |
1da177e4 LT |
3219 | } else { |
3220 | /* Deliver the message to the user. */ | |
b2655f26 | 3221 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3222 | |
3223 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3224 | if (!recv_msg) { |
c70d7499 CM |
3225 | /* |
3226 | * We couldn't allocate memory for the | |
3227 | * message, so requeue it for handling later. | |
3228 | */ | |
1da177e4 | 3229 | rv = 1; |
393d2cc3 | 3230 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3231 | } else { |
3232 | /* Extract the source address from the data. */ | |
3233 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3234 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3235 | lan_addr->session_handle = msg->rsp[4]; | |
3236 | lan_addr->remote_SWID = msg->rsp[8]; | |
3237 | lan_addr->local_SWID = msg->rsp[5]; | |
3238 | lan_addr->lun = msg->rsp[9] & 3; | |
3239 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3240 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3241 | ||
c70d7499 CM |
3242 | /* |
3243 | * Extract the rest of the message information | |
3244 | * from the IPMB header. | |
3245 | */ | |
1da177e4 LT |
3246 | recv_msg->user = user; |
3247 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3248 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3249 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3250 | recv_msg->msg.cmd = msg->rsp[10]; | |
3251 | recv_msg->msg.data = recv_msg->msg_data; | |
3252 | ||
c70d7499 CM |
3253 | /* |
3254 | * We chop off 12, not 11 bytes because the checksum | |
3255 | * at the end also needs to be removed. | |
3256 | */ | |
1da177e4 LT |
3257 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3258 | memcpy(recv_msg->msg_data, | |
3259 | &(msg->rsp[11]), | |
3260 | msg->rsp_size - 12); | |
3261 | deliver_response(recv_msg); | |
3262 | } | |
3263 | } | |
3264 | ||
3265 | return rv; | |
3266 | } | |
3267 | ||
3268 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, | |
3269 | struct ipmi_smi_msg *msg) | |
3270 | { | |
3271 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3272 | |
1da177e4 LT |
3273 | recv_msg->msgid = 0; |
3274 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3275 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3276 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3277 | smi_addr->lun = msg->rsp[0] & 3; | |
3278 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3279 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3280 | recv_msg->msg.cmd = msg->rsp[1]; | |
3281 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3282 | recv_msg->msg.data = recv_msg->msg_data; | |
3283 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3284 | } | |
3285 | ||
1da177e4 LT |
3286 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3287 | struct ipmi_smi_msg *msg) | |
3288 | { | |
3289 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3290 | struct list_head msgs; | |
3291 | ipmi_user_t user; | |
3292 | int rv = 0; | |
3293 | int deliver_count = 0; | |
3294 | unsigned long flags; | |
3295 | ||
3296 | if (msg->rsp_size < 19) { | |
3297 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3298 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3299 | return 0; |
3300 | } | |
3301 | ||
3302 | if (msg->rsp[2] != 0) { | |
3303 | /* An error getting the event, just ignore it. */ | |
3304 | return 0; | |
3305 | } | |
3306 | ||
3307 | INIT_LIST_HEAD(&msgs); | |
3308 | ||
393d2cc3 | 3309 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3310 | |
b2655f26 | 3311 | ipmi_inc_stat(intf, events); |
1da177e4 | 3312 | |
c70d7499 CM |
3313 | /* |
3314 | * Allocate and fill in one message for every user that is | |
3315 | * getting events. | |
3316 | */ | |
393d2cc3 CM |
3317 | rcu_read_lock(); |
3318 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3319 | if (!user->gets_events) |
1da177e4 LT |
3320 | continue; |
3321 | ||
3322 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3323 | if (!recv_msg) { |
393d2cc3 | 3324 | rcu_read_unlock(); |
8a3628d5 CM |
3325 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3326 | link) { | |
1da177e4 LT |
3327 | list_del(&recv_msg->link); |
3328 | ipmi_free_recv_msg(recv_msg); | |
3329 | } | |
c70d7499 CM |
3330 | /* |
3331 | * We couldn't allocate memory for the | |
3332 | * message, so requeue it for handling | |
3333 | * later. | |
3334 | */ | |
1da177e4 LT |
3335 | rv = 1; |
3336 | goto out; | |
3337 | } | |
3338 | ||
3339 | deliver_count++; | |
3340 | ||
3341 | copy_event_into_recv_msg(recv_msg, msg); | |
3342 | recv_msg->user = user; | |
393d2cc3 | 3343 | kref_get(&user->refcount); |
1da177e4 LT |
3344 | list_add_tail(&(recv_msg->link), &msgs); |
3345 | } | |
393d2cc3 | 3346 | rcu_read_unlock(); |
1da177e4 LT |
3347 | |
3348 | if (deliver_count) { | |
3349 | /* Now deliver all the messages. */ | |
3350 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3351 | list_del(&recv_msg->link); | |
3352 | deliver_response(recv_msg); | |
3353 | } | |
3354 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3355 | /* |
3356 | * No one to receive the message, put it in queue if there's | |
3357 | * not already too many things in the queue. | |
3358 | */ | |
1da177e4 | 3359 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3360 | if (!recv_msg) { |
c70d7499 CM |
3361 | /* |
3362 | * We couldn't allocate memory for the | |
3363 | * message, so requeue it for handling | |
3364 | * later. | |
3365 | */ | |
1da177e4 LT |
3366 | rv = 1; |
3367 | goto out; | |
3368 | } | |
3369 | ||
3370 | copy_event_into_recv_msg(recv_msg, msg); | |
3371 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3372 | intf->waiting_events_count++; |
87ebd06f | 3373 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3374 | /* |
3375 | * There's too many things in the queue, discard this | |
3376 | * message. | |
3377 | */ | |
87ebd06f CM |
3378 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3379 | " incoming events\n"); | |
3380 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3381 | } |
3382 | ||
3383 | out: | |
3384 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3385 | ||
3386 | return rv; | |
3387 | } | |
3388 | ||
3389 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3390 | struct ipmi_smi_msg *msg) | |
3391 | { | |
3392 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3393 | struct ipmi_user *user; |
1da177e4 LT |
3394 | |
3395 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3396 | if (recv_msg == NULL) { |
3397 | printk(KERN_WARNING | |
3398 | "IPMI message received with no owner. This\n" | |
3399 | "could be because of a malformed message, or\n" | |
3400 | "because of a hardware error. Contact your\n" | |
3401 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3402 | return 0; |
3403 | } | |
1da177e4 | 3404 | |
393d2cc3 | 3405 | user = recv_msg->user; |
1da177e4 | 3406 | /* Make sure the user still exists. */ |
393d2cc3 | 3407 | if (user && !user->valid) { |
56a55ec6 | 3408 | /* The user for the message went away, so give up. */ |
b2655f26 | 3409 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3410 | ipmi_free_recv_msg(recv_msg); |
3411 | } else { | |
3412 | struct ipmi_system_interface_addr *smi_addr; | |
3413 | ||
b2655f26 | 3414 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3415 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3416 | recv_msg->msgid = msg->msgid; | |
3417 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3418 | &(recv_msg->addr)); | |
3419 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3420 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3421 | smi_addr->lun = msg->rsp[0] & 3; | |
3422 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3423 | recv_msg->msg.cmd = msg->rsp[1]; | |
3424 | memcpy(recv_msg->msg_data, | |
3425 | &(msg->rsp[2]), | |
3426 | msg->rsp_size - 2); | |
3427 | recv_msg->msg.data = recv_msg->msg_data; | |
3428 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3429 | deliver_response(recv_msg); | |
3430 | } | |
3431 | ||
3432 | return 0; | |
3433 | } | |
3434 | ||
c70d7499 CM |
3435 | /* |
3436 | * Handle a new message. Return 1 if the message should be requeued, | |
3437 | * 0 if the message should be freed, or -1 if the message should not | |
3438 | * be freed or requeued. | |
3439 | */ | |
1da177e4 LT |
3440 | static int handle_new_recv_msg(ipmi_smi_t intf, |
3441 | struct ipmi_smi_msg *msg) | |
3442 | { | |
3443 | int requeue; | |
3444 | int chan; | |
3445 | ||
3446 | #ifdef DEBUG_MSGING | |
3447 | int m; | |
3448 | printk("Recv:"); | |
e8b33617 | 3449 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3450 | printk(" %2.2x", msg->rsp[m]); |
3451 | printk("\n"); | |
3452 | #endif | |
3453 | if (msg->rsp_size < 2) { | |
3454 | /* Message is too small to be correct. */ | |
3455 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3456 | " for netfn %x cmd %x, got %d bytes\n", | |
3457 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3458 | ||
3459 | /* Generate an error response for the message. */ | |
3460 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3461 | msg->rsp[1] = msg->data[1]; | |
3462 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3463 | msg->rsp_size = 3; | |
c70d7499 CM |
3464 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3465 | || (msg->rsp[1] != msg->data[1])) { | |
3466 | /* | |
3467 | * The NetFN and Command in the response is not even | |
3468 | * marginally correct. | |
3469 | */ | |
1da177e4 LT |
3470 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3471 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3472 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3473 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3474 | ||
3475 | /* Generate an error response for the message. */ | |
3476 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3477 | msg->rsp[1] = msg->data[1]; | |
3478 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3479 | msg->rsp_size = 3; | |
3480 | } | |
3481 | ||
3482 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3483 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3484 | && (msg->user_data != NULL)) { |
3485 | /* | |
3486 | * It's a response to a response we sent. For this we | |
3487 | * deliver a send message response to the user. | |
3488 | */ | |
393d2cc3 | 3489 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3490 | |
3491 | requeue = 0; | |
3492 | if (msg->rsp_size < 2) | |
3493 | /* Message is too small to be correct. */ | |
3494 | goto out; | |
3495 | ||
3496 | chan = msg->data[2] & 0x0f; | |
3497 | if (chan >= IPMI_MAX_CHANNELS) | |
3498 | /* Invalid channel number */ | |
3499 | goto out; | |
3500 | ||
393d2cc3 CM |
3501 | if (!recv_msg) |
3502 | goto out; | |
3503 | ||
3504 | /* Make sure the user still exists. */ | |
3505 | if (!recv_msg->user || !recv_msg->user->valid) | |
3506 | goto out; | |
3507 | ||
3508 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3509 | recv_msg->msg.data = recv_msg->msg_data; | |
3510 | recv_msg->msg.data_len = 1; | |
3511 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3512 | deliver_response(recv_msg); | |
1da177e4 | 3513 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3514 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3515 | /* It's from the receive queue. */ |
3516 | chan = msg->rsp[3] & 0xf; | |
3517 | if (chan >= IPMI_MAX_CHANNELS) { | |
3518 | /* Invalid channel number */ | |
3519 | requeue = 0; | |
3520 | goto out; | |
3521 | } | |
3522 | ||
3523 | switch (intf->channels[chan].medium) { | |
3524 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3525 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3526 | /* |
3527 | * It's a response, so find the | |
3528 | * requesting message and send it up. | |
3529 | */ | |
1da177e4 LT |
3530 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3531 | } else { | |
c70d7499 CM |
3532 | /* |
3533 | * It's a command to the SMS from some other | |
3534 | * entity. Handle that. | |
3535 | */ | |
1da177e4 LT |
3536 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3537 | } | |
3538 | break; | |
3539 | ||
3540 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3541 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3542 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3543 | /* |
3544 | * It's a response, so find the | |
3545 | * requesting message and send it up. | |
3546 | */ | |
1da177e4 LT |
3547 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3548 | } else { | |
c70d7499 CM |
3549 | /* |
3550 | * It's a command to the SMS from some other | |
3551 | * entity. Handle that. | |
3552 | */ | |
1da177e4 LT |
3553 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3554 | } | |
3555 | break; | |
3556 | ||
3557 | default: | |
c70d7499 CM |
3558 | /* |
3559 | * We don't handle the channel type, so just | |
3560 | * free the message. | |
3561 | */ | |
1da177e4 LT |
3562 | requeue = 0; |
3563 | } | |
3564 | ||
3565 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3566 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
1da177e4 LT |
3567 | /* It's an asyncronous event. */ |
3568 | requeue = handle_read_event_rsp(intf, msg); | |
3569 | } else { | |
3570 | /* It's a response from the local BMC. */ | |
3571 | requeue = handle_bmc_rsp(intf, msg); | |
3572 | } | |
3573 | ||
3574 | out: | |
3575 | return requeue; | |
3576 | } | |
3577 | ||
3578 | /* Handle a new message from the lower layer. */ | |
3579 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3580 | struct ipmi_smi_msg *msg) | |
3581 | { | |
5956dce1 | 3582 | unsigned long flags = 0; /* keep us warning-free. */ |
1da177e4 | 3583 | int rv; |
5956dce1 | 3584 | int run_to_completion; |
1da177e4 LT |
3585 | |
3586 | ||
1da177e4 LT |
3587 | if ((msg->data_size >= 2) |
3588 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3589 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3590 | && (msg->user_data == NULL)) { |
3591 | /* | |
3592 | * This is the local response to a command send, start | |
3593 | * the timer for these. The user_data will not be | |
3594 | * NULL if this is a response send, and we will let | |
3595 | * response sends just go through. | |
3596 | */ | |
3597 | ||
3598 | /* | |
3599 | * Check for errors, if we get certain errors (ones | |
3600 | * that mean basically we can try again later), we | |
3601 | * ignore them and start the timer. Otherwise we | |
3602 | * report the error immediately. | |
3603 | */ | |
1da177e4 LT |
3604 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
3605 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
3606 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
3607 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 3608 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
3609 | int chan = msg->rsp[3] & 0xf; |
3610 | ||
3611 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
3612 | if (chan >= IPMI_MAX_CHANNELS) |
3613 | ; /* This shouldn't happen */ | |
3614 | else if ((intf->channels[chan].medium | |
3615 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3616 | || (intf->channels[chan].medium | |
3617 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 3618 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 3619 | else |
b2655f26 | 3620 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 3621 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 3622 | } else |
1da177e4 LT |
3623 | /* The message was sent, start the timer. */ |
3624 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 LT |
3625 | |
3626 | ipmi_free_smi_msg(msg); | |
393d2cc3 | 3627 | goto out; |
1da177e4 LT |
3628 | } |
3629 | ||
c70d7499 CM |
3630 | /* |
3631 | * To preserve message order, if the list is not empty, we | |
3632 | * tack this message onto the end of the list. | |
3633 | */ | |
5956dce1 KB |
3634 | run_to_completion = intf->run_to_completion; |
3635 | if (!run_to_completion) | |
3636 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
393d2cc3 CM |
3637 | if (!list_empty(&intf->waiting_msgs)) { |
3638 | list_add_tail(&msg->link, &intf->waiting_msgs); | |
5956dce1 KB |
3639 | if (!run_to_completion) |
3640 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
393d2cc3 | 3641 | goto out; |
1da177e4 | 3642 | } |
5956dce1 KB |
3643 | if (!run_to_completion) |
3644 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
c70d7499 | 3645 | |
1da177e4 LT |
3646 | rv = handle_new_recv_msg(intf, msg); |
3647 | if (rv > 0) { | |
c70d7499 CM |
3648 | /* |
3649 | * Could not handle the message now, just add it to a | |
3650 | * list to handle later. | |
3651 | */ | |
5956dce1 KB |
3652 | run_to_completion = intf->run_to_completion; |
3653 | if (!run_to_completion) | |
3654 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
393d2cc3 | 3655 | list_add_tail(&msg->link, &intf->waiting_msgs); |
5956dce1 KB |
3656 | if (!run_to_completion) |
3657 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
1da177e4 LT |
3658 | } else if (rv == 0) { |
3659 | ipmi_free_smi_msg(msg); | |
3660 | } | |
3661 | ||
393d2cc3 CM |
3662 | out: |
3663 | return; | |
1da177e4 | 3664 | } |
c70d7499 | 3665 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
3666 | |
3667 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3668 | { | |
3669 | ipmi_user_t user; | |
3670 | ||
393d2cc3 CM |
3671 | rcu_read_lock(); |
3672 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3673 | if (!user->handler->ipmi_watchdog_pretimeout) |
1da177e4 LT |
3674 | continue; |
3675 | ||
3676 | user->handler->ipmi_watchdog_pretimeout(user->handler_data); | |
3677 | } | |
393d2cc3 | 3678 | rcu_read_unlock(); |
1da177e4 | 3679 | } |
c70d7499 | 3680 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 3681 | |
882fe011 CM |
3682 | static struct ipmi_smi_msg * |
3683 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
3684 | unsigned char seq, long seqid) | |
1da177e4 | 3685 | { |
882fe011 | 3686 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 3687 | if (!smi_msg) |
c70d7499 CM |
3688 | /* |
3689 | * If we can't allocate the message, then just return, we | |
3690 | * get 4 retries, so this should be ok. | |
3691 | */ | |
882fe011 | 3692 | return NULL; |
1da177e4 LT |
3693 | |
3694 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
3695 | smi_msg->data_size = recv_msg->msg.data_len; | |
3696 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 3697 | |
1da177e4 LT |
3698 | #ifdef DEBUG_MSGING |
3699 | { | |
3700 | int m; | |
3701 | printk("Resend: "); | |
e8b33617 | 3702 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
3703 | printk(" %2.2x", smi_msg->data[m]); |
3704 | printk("\n"); | |
3705 | } | |
3706 | #endif | |
882fe011 | 3707 | return smi_msg; |
1da177e4 LT |
3708 | } |
3709 | ||
393d2cc3 CM |
3710 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
3711 | struct list_head *timeouts, long timeout_period, | |
3712 | int slot, unsigned long *flags) | |
3713 | { | |
b2c03941 CM |
3714 | struct ipmi_recv_msg *msg; |
3715 | struct ipmi_smi_handlers *handlers; | |
3716 | ||
3717 | if (intf->intf_num == -1) | |
3718 | return; | |
393d2cc3 CM |
3719 | |
3720 | if (!ent->inuse) | |
3721 | return; | |
3722 | ||
3723 | ent->timeout -= timeout_period; | |
3724 | if (ent->timeout > 0) | |
3725 | return; | |
3726 | ||
3727 | if (ent->retries_left == 0) { | |
3728 | /* The message has used all its retries. */ | |
3729 | ent->inuse = 0; | |
3730 | msg = ent->recv_msg; | |
3731 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 3732 | if (ent->broadcast) |
b2655f26 | 3733 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
393d2cc3 | 3734 | else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) |
b2655f26 | 3735 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 3736 | else |
b2655f26 | 3737 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
3738 | } else { |
3739 | struct ipmi_smi_msg *smi_msg; | |
3740 | /* More retries, send again. */ | |
3741 | ||
c70d7499 CM |
3742 | /* |
3743 | * Start with the max timer, set to normal timer after | |
3744 | * the message is sent. | |
3745 | */ | |
393d2cc3 CM |
3746 | ent->timeout = MAX_MSG_TIMEOUT; |
3747 | ent->retries_left--; | |
393d2cc3 | 3748 | if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) |
b2655f26 | 3749 | ipmi_inc_stat(intf, retransmitted_lan_commands); |
393d2cc3 | 3750 | else |
b2655f26 | 3751 | ipmi_inc_stat(intf, retransmitted_ipmb_commands); |
393d2cc3 CM |
3752 | |
3753 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, | |
3754 | ent->seqid); | |
8a3628d5 | 3755 | if (!smi_msg) |
393d2cc3 CM |
3756 | return; |
3757 | ||
3758 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 3759 | |
c70d7499 CM |
3760 | /* |
3761 | * Send the new message. We send with a zero | |
3762 | * priority. It timed out, I doubt time is that | |
3763 | * critical now, and high priority messages are really | |
3764 | * only for messages to the local MC, which don't get | |
3765 | * resent. | |
3766 | */ | |
b2c03941 CM |
3767 | handlers = intf->handlers; |
3768 | if (handlers) | |
3769 | intf->handlers->sender(intf->send_info, | |
3770 | smi_msg, 0); | |
3771 | else | |
3772 | ipmi_free_smi_msg(smi_msg); | |
3773 | ||
393d2cc3 CM |
3774 | spin_lock_irqsave(&intf->seq_lock, *flags); |
3775 | } | |
3776 | } | |
3777 | ||
3778 | static void ipmi_timeout_handler(long timeout_period) | |
1da177e4 LT |
3779 | { |
3780 | ipmi_smi_t intf; | |
3781 | struct list_head timeouts; | |
3782 | struct ipmi_recv_msg *msg, *msg2; | |
3783 | struct ipmi_smi_msg *smi_msg, *smi_msg2; | |
3784 | unsigned long flags; | |
bca0324d | 3785 | int i; |
1da177e4 | 3786 | |
bca0324d CM |
3787 | rcu_read_lock(); |
3788 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 | 3789 | /* See if any waiting messages need to be processed. */ |
393d2cc3 | 3790 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); |
8a3628d5 CM |
3791 | list_for_each_entry_safe(smi_msg, smi_msg2, |
3792 | &intf->waiting_msgs, link) { | |
3793 | if (!handle_new_recv_msg(intf, smi_msg)) { | |
1da177e4 LT |
3794 | list_del(&smi_msg->link); |
3795 | ipmi_free_smi_msg(smi_msg); | |
3796 | } else { | |
c70d7499 CM |
3797 | /* |
3798 | * To preserve message order, quit if we | |
3799 | * can't handle a message. | |
3800 | */ | |
1da177e4 LT |
3801 | break; |
3802 | } | |
3803 | } | |
393d2cc3 | 3804 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
1da177e4 | 3805 | |
c70d7499 CM |
3806 | /* |
3807 | * Go through the seq table and find any messages that | |
3808 | * have timed out, putting them in the timeouts | |
3809 | * list. | |
3810 | */ | |
41c57a87 | 3811 | INIT_LIST_HEAD(&timeouts); |
393d2cc3 | 3812 | spin_lock_irqsave(&intf->seq_lock, flags); |
bca0324d CM |
3813 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) |
3814 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
3815 | &timeouts, timeout_period, i, | |
393d2cc3 CM |
3816 | &flags); |
3817 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
3818 | ||
3819 | list_for_each_entry_safe(msg, msg2, &timeouts, link) | |
b2c03941 | 3820 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); |
b9675136 CM |
3821 | |
3822 | /* | |
3823 | * Maintenance mode handling. Check the timeout | |
3824 | * optimistically before we claim the lock. It may | |
3825 | * mean a timeout gets missed occasionally, but that | |
3826 | * only means the timeout gets extended by one period | |
3827 | * in that case. No big deal, and it avoids the lock | |
3828 | * most of the time. | |
3829 | */ | |
3830 | if (intf->auto_maintenance_timeout > 0) { | |
3831 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
3832 | if (intf->auto_maintenance_timeout > 0) { | |
3833 | intf->auto_maintenance_timeout | |
3834 | -= timeout_period; | |
3835 | if (!intf->maintenance_mode | |
c70d7499 | 3836 | && (intf->auto_maintenance_timeout <= 0)) { |
b9675136 CM |
3837 | intf->maintenance_mode_enable = 0; |
3838 | maintenance_mode_update(intf); | |
3839 | } | |
3840 | } | |
3841 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
3842 | flags); | |
3843 | } | |
1da177e4 | 3844 | } |
bca0324d | 3845 | rcu_read_unlock(); |
1da177e4 LT |
3846 | } |
3847 | ||
3848 | static void ipmi_request_event(void) | |
3849 | { | |
b2c03941 CM |
3850 | ipmi_smi_t intf; |
3851 | struct ipmi_smi_handlers *handlers; | |
1da177e4 | 3852 | |
bca0324d | 3853 | rcu_read_lock(); |
c70d7499 CM |
3854 | /* |
3855 | * Called from the timer, no need to check if handlers is | |
3856 | * valid. | |
3857 | */ | |
b2c03941 | 3858 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b9675136 CM |
3859 | /* No event requests when in maintenance mode. */ |
3860 | if (intf->maintenance_mode_enable) | |
3861 | continue; | |
3862 | ||
b2c03941 CM |
3863 | handlers = intf->handlers; |
3864 | if (handlers) | |
3865 | handlers->request_events(intf->send_info); | |
3866 | } | |
bca0324d | 3867 | rcu_read_unlock(); |
1da177e4 LT |
3868 | } |
3869 | ||
3870 | static struct timer_list ipmi_timer; | |
3871 | ||
3872 | /* Call every ~100 ms. */ | |
3873 | #define IPMI_TIMEOUT_TIME 100 | |
3874 | ||
3875 | /* How many jiffies does it take to get to the timeout time. */ | |
3876 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
3877 | ||
c70d7499 CM |
3878 | /* |
3879 | * Request events from the queue every second (this is the number of | |
3880 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
3881 | * future, IPMI will add a way to know immediately if an event is in | |
3882 | * the queue and this silliness can go away. | |
3883 | */ | |
1da177e4 LT |
3884 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) |
3885 | ||
8f43f84f | 3886 | static atomic_t stop_operation; |
1da177e4 LT |
3887 | static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
3888 | ||
3889 | static void ipmi_timeout(unsigned long data) | |
3890 | { | |
8f43f84f | 3891 | if (atomic_read(&stop_operation)) |
1da177e4 | 3892 | return; |
1da177e4 LT |
3893 | |
3894 | ticks_to_req_ev--; | |
3895 | if (ticks_to_req_ev == 0) { | |
3896 | ipmi_request_event(); | |
3897 | ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
3898 | } | |
3899 | ||
3900 | ipmi_timeout_handler(IPMI_TIMEOUT_TIME); | |
3901 | ||
8f43f84f | 3902 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
1da177e4 LT |
3903 | } |
3904 | ||
3905 | ||
3906 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
3907 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
3908 | ||
3909 | /* FIXME - convert these to slabs. */ | |
3910 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
3911 | { | |
3912 | atomic_dec(&smi_msg_inuse_count); | |
3913 | kfree(msg); | |
3914 | } | |
3915 | ||
3916 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
3917 | { | |
3918 | struct ipmi_smi_msg *rv; | |
3919 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
3920 | if (rv) { | |
3921 | rv->done = free_smi_msg; | |
3922 | rv->user_data = NULL; | |
3923 | atomic_inc(&smi_msg_inuse_count); | |
3924 | } | |
3925 | return rv; | |
3926 | } | |
c70d7499 | 3927 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
3928 | |
3929 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
3930 | { | |
3931 | atomic_dec(&recv_msg_inuse_count); | |
3932 | kfree(msg); | |
3933 | } | |
3934 | ||
74006309 | 3935 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
3936 | { |
3937 | struct ipmi_recv_msg *rv; | |
3938 | ||
3939 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
3940 | if (rv) { | |
a9eec556 | 3941 | rv->user = NULL; |
1da177e4 LT |
3942 | rv->done = free_recv_msg; |
3943 | atomic_inc(&recv_msg_inuse_count); | |
3944 | } | |
3945 | return rv; | |
3946 | } | |
3947 | ||
393d2cc3 CM |
3948 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
3949 | { | |
3950 | if (msg->user) | |
3951 | kref_put(&msg->user->refcount, free_user); | |
3952 | msg->done(msg); | |
3953 | } | |
c70d7499 | 3954 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 3955 | |
1da177e4 LT |
3956 | #ifdef CONFIG_IPMI_PANIC_EVENT |
3957 | ||
3958 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) | |
3959 | { | |
3960 | } | |
3961 | ||
3962 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
3963 | { | |
3964 | } | |
3965 | ||
3966 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 3967 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3968 | { |
56a55ec6 CM |
3969 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3970 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
3971 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 3972 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 3973 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
3974 | intf->event_receiver = msg->msg.data[1]; |
3975 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
3976 | } |
3977 | } | |
3978 | ||
56a55ec6 | 3979 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3980 | { |
56a55ec6 CM |
3981 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3982 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
3983 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
3984 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
3985 | /* | |
3986 | * A get device id command, save if we are an event | |
3987 | * receiver or generator. | |
3988 | */ | |
56a55ec6 CM |
3989 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
3990 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
3991 | } |
3992 | } | |
3993 | #endif | |
3994 | ||
3995 | static void send_panic_events(char *str) | |
3996 | { | |
3997 | struct kernel_ipmi_msg msg; | |
3998 | ipmi_smi_t intf; | |
3999 | unsigned char data[16]; | |
1da177e4 LT |
4000 | struct ipmi_system_interface_addr *si; |
4001 | struct ipmi_addr addr; | |
4002 | struct ipmi_smi_msg smi_msg; | |
4003 | struct ipmi_recv_msg recv_msg; | |
4004 | ||
4005 | si = (struct ipmi_system_interface_addr *) &addr; | |
4006 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4007 | si->channel = IPMI_BMC_CHANNEL; | |
4008 | si->lun = 0; | |
4009 | ||
4010 | /* Fill in an event telling that we have failed. */ | |
4011 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4012 | msg.cmd = 2; /* Platform event command. */ | |
4013 | msg.data = data; | |
4014 | msg.data_len = 8; | |
cda315ab | 4015 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4016 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4017 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4018 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4019 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4020 | ||
c70d7499 CM |
4021 | /* |
4022 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4023 | * to make the panic events more useful. | |
4024 | */ | |
1da177e4 LT |
4025 | if (str) { |
4026 | data[3] = str[0]; | |
4027 | data[6] = str[1]; | |
4028 | data[7] = str[2]; | |
4029 | } | |
4030 | ||
4031 | smi_msg.done = dummy_smi_done_handler; | |
4032 | recv_msg.done = dummy_recv_done_handler; | |
4033 | ||
4034 | /* For every registered interface, send the event. */ | |
bca0324d | 4035 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4036 | if (!intf->handlers) |
4037 | /* Interface is not ready. */ | |
1da177e4 LT |
4038 | continue; |
4039 | ||
5956dce1 | 4040 | intf->run_to_completion = 1; |
1da177e4 LT |
4041 | /* Send the event announcing the panic. */ |
4042 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
4043 | i_ipmi_request(NULL, | |
4044 | intf, | |
4045 | &addr, | |
4046 | 0, | |
4047 | &msg, | |
56a55ec6 | 4048 | intf, |
1da177e4 LT |
4049 | &smi_msg, |
4050 | &recv_msg, | |
4051 | 0, | |
c14979b9 CM |
4052 | intf->channels[0].address, |
4053 | intf->channels[0].lun, | |
1da177e4 LT |
4054 | 0, 1); /* Don't retry, and don't wait. */ |
4055 | } | |
4056 | ||
4057 | #ifdef CONFIG_IPMI_PANIC_STRING | |
c70d7499 CM |
4058 | /* |
4059 | * On every interface, dump a bunch of OEM event holding the | |
4060 | * string. | |
4061 | */ | |
4062 | if (!str) | |
1da177e4 LT |
4063 | return; |
4064 | ||
bca0324d CM |
4065 | /* For every registered interface, send the event. */ |
4066 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4067 | char *p = str; |
4068 | struct ipmi_ipmb_addr *ipmb; | |
4069 | int j; | |
4070 | ||
bca0324d CM |
4071 | if (intf->intf_num == -1) |
4072 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4073 | continue; |
4074 | ||
78ba2faf CM |
4075 | /* |
4076 | * intf_num is used as an marker to tell if the | |
4077 | * interface is valid. Thus we need a read barrier to | |
4078 | * make sure data fetched before checking intf_num | |
4079 | * won't be used. | |
4080 | */ | |
4081 | smp_rmb(); | |
4082 | ||
c70d7499 CM |
4083 | /* |
4084 | * First job here is to figure out where to send the | |
4085 | * OEM events. There's no way in IPMI to send OEM | |
4086 | * events using an event send command, so we have to | |
4087 | * find the SEL to put them in and stick them in | |
4088 | * there. | |
4089 | */ | |
1da177e4 LT |
4090 | |
4091 | /* Get capabilities from the get device id. */ | |
4092 | intf->local_sel_device = 0; | |
4093 | intf->local_event_generator = 0; | |
4094 | intf->event_receiver = 0; | |
4095 | ||
4096 | /* Request the device info from the local MC. */ | |
4097 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4098 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4099 | msg.data = NULL; | |
4100 | msg.data_len = 0; | |
4101 | intf->null_user_handler = device_id_fetcher; | |
4102 | i_ipmi_request(NULL, | |
4103 | intf, | |
4104 | &addr, | |
4105 | 0, | |
4106 | &msg, | |
56a55ec6 | 4107 | intf, |
1da177e4 LT |
4108 | &smi_msg, |
4109 | &recv_msg, | |
4110 | 0, | |
c14979b9 CM |
4111 | intf->channels[0].address, |
4112 | intf->channels[0].lun, | |
1da177e4 LT |
4113 | 0, 1); /* Don't retry, and don't wait. */ |
4114 | ||
4115 | if (intf->local_event_generator) { | |
4116 | /* Request the event receiver from the local MC. */ | |
4117 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4118 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4119 | msg.data = NULL; | |
4120 | msg.data_len = 0; | |
4121 | intf->null_user_handler = event_receiver_fetcher; | |
4122 | i_ipmi_request(NULL, | |
4123 | intf, | |
4124 | &addr, | |
4125 | 0, | |
4126 | &msg, | |
56a55ec6 | 4127 | intf, |
1da177e4 LT |
4128 | &smi_msg, |
4129 | &recv_msg, | |
4130 | 0, | |
c14979b9 CM |
4131 | intf->channels[0].address, |
4132 | intf->channels[0].lun, | |
1da177e4 LT |
4133 | 0, 1); /* no retry, and no wait. */ |
4134 | } | |
4135 | intf->null_user_handler = NULL; | |
4136 | ||
c70d7499 CM |
4137 | /* |
4138 | * Validate the event receiver. The low bit must not | |
4139 | * be 1 (it must be a valid IPMB address), it cannot | |
4140 | * be zero, and it must not be my address. | |
4141 | */ | |
4142 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4143 | && (intf->event_receiver != 0) |
c70d7499 CM |
4144 | && (intf->event_receiver != intf->channels[0].address)) { |
4145 | /* | |
4146 | * The event receiver is valid, send an IPMB | |
4147 | * message. | |
4148 | */ | |
1da177e4 LT |
4149 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4150 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4151 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4152 | ipmb->lun = intf->event_receiver_lun; | |
4153 | ipmb->slave_addr = intf->event_receiver; | |
4154 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4155 | /* |
4156 | * The event receiver was not valid (or was | |
4157 | * me), but I am an SEL device, just dump it | |
4158 | * in my SEL. | |
4159 | */ | |
1da177e4 LT |
4160 | si = (struct ipmi_system_interface_addr *) &addr; |
4161 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4162 | si->channel = IPMI_BMC_CHANNEL; | |
4163 | si->lun = 0; | |
4164 | } else | |
4165 | continue; /* No where to send the event. */ | |
4166 | ||
1da177e4 LT |
4167 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4168 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4169 | msg.data = data; | |
4170 | msg.data_len = 16; | |
4171 | ||
4172 | j = 0; | |
4173 | while (*p) { | |
4174 | int size = strlen(p); | |
4175 | ||
4176 | if (size > 11) | |
4177 | size = 11; | |
4178 | data[0] = 0; | |
4179 | data[1] = 0; | |
4180 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4181 | data[3] = intf->channels[0].address; |
1da177e4 | 4182 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4183 | /* |
4184 | * Always give 11 bytes, so strncpy will fill | |
4185 | * it with zeroes for me. | |
4186 | */ | |
1da177e4 LT |
4187 | strncpy(data+5, p, 11); |
4188 | p += size; | |
4189 | ||
4190 | i_ipmi_request(NULL, | |
4191 | intf, | |
4192 | &addr, | |
4193 | 0, | |
4194 | &msg, | |
56a55ec6 | 4195 | intf, |
1da177e4 LT |
4196 | &smi_msg, |
4197 | &recv_msg, | |
4198 | 0, | |
c14979b9 CM |
4199 | intf->channels[0].address, |
4200 | intf->channels[0].lun, | |
1da177e4 LT |
4201 | 0, 1); /* no retry, and no wait. */ |
4202 | } | |
c70d7499 | 4203 | } |
1da177e4 LT |
4204 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
4205 | } | |
4206 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
4207 | ||
0c8204b3 | 4208 | static int has_panicked; |
1da177e4 LT |
4209 | |
4210 | static int panic_event(struct notifier_block *this, | |
4211 | unsigned long event, | |
c70d7499 | 4212 | void *ptr) |
1da177e4 | 4213 | { |
1da177e4 LT |
4214 | ipmi_smi_t intf; |
4215 | ||
f18190bd | 4216 | if (has_panicked) |
1da177e4 | 4217 | return NOTIFY_DONE; |
f18190bd | 4218 | has_panicked = 1; |
1da177e4 LT |
4219 | |
4220 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4221 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4222 | if (!intf->handlers) |
4223 | /* Interface is not ready. */ | |
1da177e4 LT |
4224 | continue; |
4225 | ||
5956dce1 | 4226 | intf->run_to_completion = 1; |
1da177e4 LT |
4227 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
4228 | } | |
4229 | ||
4230 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
4231 | send_panic_events(ptr); | |
4232 | #endif | |
4233 | ||
4234 | return NOTIFY_DONE; | |
4235 | } | |
4236 | ||
4237 | static struct notifier_block panic_block = { | |
4238 | .notifier_call = panic_event, | |
4239 | .next = NULL, | |
4240 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4241 | }; | |
4242 | ||
4243 | static int ipmi_init_msghandler(void) | |
4244 | { | |
50c812b2 | 4245 | int rv; |
1da177e4 LT |
4246 | |
4247 | if (initialized) | |
4248 | return 0; | |
4249 | ||
50c812b2 CM |
4250 | rv = driver_register(&ipmidriver); |
4251 | if (rv) { | |
4252 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4253 | return rv; | |
4254 | } | |
4255 | ||
1da177e4 | 4256 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4257 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4258 | |
3b625943 | 4259 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4260 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4261 | if (!proc_ipmi_root) { | |
4262 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
4263 | return -ENOMEM; | |
4264 | } | |
4265 | ||
4266 | proc_ipmi_root->owner = THIS_MODULE; | |
3b625943 | 4267 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4268 | |
409035e0 CM |
4269 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4270 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4271 | |
e041c683 | 4272 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4273 | |
4274 | initialized = 1; | |
4275 | ||
4276 | return 0; | |
4277 | } | |
4278 | ||
4279 | static __init int ipmi_init_msghandler_mod(void) | |
4280 | { | |
4281 | ipmi_init_msghandler(); | |
4282 | return 0; | |
4283 | } | |
4284 | ||
4285 | static __exit void cleanup_ipmi(void) | |
4286 | { | |
4287 | int count; | |
4288 | ||
4289 | if (!initialized) | |
4290 | return; | |
4291 | ||
e041c683 | 4292 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4293 | |
c70d7499 CM |
4294 | /* |
4295 | * This can't be called if any interfaces exist, so no worry | |
4296 | * about shutting down the interfaces. | |
4297 | */ | |
1da177e4 | 4298 | |
c70d7499 CM |
4299 | /* |
4300 | * Tell the timer to stop, then wait for it to stop. This | |
4301 | * avoids problems with race conditions removing the timer | |
4302 | * here. | |
4303 | */ | |
8f43f84f CM |
4304 | atomic_inc(&stop_operation); |
4305 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4306 | |
3b625943 | 4307 | #ifdef CONFIG_PROC_FS |
3542ae4c | 4308 | remove_proc_entry(proc_ipmi_root->name, NULL); |
3b625943 | 4309 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4310 | |
50c812b2 CM |
4311 | driver_unregister(&ipmidriver); |
4312 | ||
1da177e4 LT |
4313 | initialized = 0; |
4314 | ||
4315 | /* Check for buffer leaks. */ | |
4316 | count = atomic_read(&smi_msg_inuse_count); | |
4317 | if (count != 0) | |
4318 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4319 | count); | |
4320 | count = atomic_read(&recv_msg_inuse_count); | |
4321 | if (count != 0) | |
4322 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4323 | count); | |
4324 | } | |
4325 | module_exit(cleanup_ipmi); | |
4326 | ||
4327 | module_init(ipmi_init_msghandler_mod); | |
4328 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4329 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4330 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4331 | " interface."); | |
1fdd75bd | 4332 | MODULE_VERSION(IPMI_DRIVER_VERSION); |