Commit | Line | Data |
---|---|---|
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 | */ | |
fe2d5ffc DW |
425 | static struct platform_driver ipmidriver = { |
426 | .driver = { | |
427 | .name = "ipmi", | |
428 | .bus = &platform_bus_type | |
429 | } | |
50c812b2 CM |
430 | }; |
431 | static DEFINE_MUTEX(ipmidriver_mutex); | |
432 | ||
bed9759b | 433 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 434 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 435 | |
c70d7499 CM |
436 | /* |
437 | * List of watchers that want to know when smi's are added and deleted. | |
438 | */ | |
bed9759b | 439 | static LIST_HEAD(smi_watchers); |
b2c03941 | 440 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 441 | |
393d2cc3 | 442 | |
b2655f26 KB |
443 | #define ipmi_inc_stat(intf, stat) \ |
444 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
445 | #define ipmi_get_stat(intf, stat) \ | |
446 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
447 | ||
448 | ||
393d2cc3 CM |
449 | static void free_recv_msg_list(struct list_head *q) |
450 | { | |
451 | struct ipmi_recv_msg *msg, *msg2; | |
452 | ||
453 | list_for_each_entry_safe(msg, msg2, q, link) { | |
454 | list_del(&msg->link); | |
455 | ipmi_free_recv_msg(msg); | |
456 | } | |
457 | } | |
458 | ||
f3ce6a0e CM |
459 | static void free_smi_msg_list(struct list_head *q) |
460 | { | |
461 | struct ipmi_smi_msg *msg, *msg2; | |
462 | ||
463 | list_for_each_entry_safe(msg, msg2, q, link) { | |
464 | list_del(&msg->link); | |
465 | ipmi_free_smi_msg(msg); | |
466 | } | |
467 | } | |
468 | ||
393d2cc3 CM |
469 | static void clean_up_interface_data(ipmi_smi_t intf) |
470 | { | |
471 | int i; | |
472 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
473 | struct list_head list; |
474 | ||
f3ce6a0e | 475 | free_smi_msg_list(&intf->waiting_msgs); |
393d2cc3 CM |
476 | free_recv_msg_list(&intf->waiting_events); |
477 | ||
78ba2faf CM |
478 | /* |
479 | * Wholesale remove all the entries from the list in the | |
480 | * interface and wait for RCU to know that none are in use. | |
481 | */ | |
d6dfd131 | 482 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
483 | INIT_LIST_HEAD(&list); |
484 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 485 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
486 | |
487 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
488 | kfree(rcvr); | |
489 | ||
490 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
491 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 492 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 493 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
494 | } |
495 | } | |
496 | ||
497 | static void intf_free(struct kref *ref) | |
498 | { | |
499 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
500 | ||
501 | clean_up_interface_data(intf); | |
502 | kfree(intf); | |
503 | } | |
504 | ||
bca0324d | 505 | struct watcher_entry { |
b2c03941 CM |
506 | int intf_num; |
507 | ipmi_smi_t intf; | |
bca0324d | 508 | struct list_head link; |
bca0324d CM |
509 | }; |
510 | ||
1da177e4 LT |
511 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
512 | { | |
bca0324d | 513 | ipmi_smi_t intf; |
e381d1c4 | 514 | LIST_HEAD(to_deliver); |
bca0324d CM |
515 | struct watcher_entry *e, *e2; |
516 | ||
b2c03941 CM |
517 | mutex_lock(&smi_watchers_mutex); |
518 | ||
bca0324d CM |
519 | mutex_lock(&ipmi_interfaces_mutex); |
520 | ||
b2c03941 | 521 | /* Build a list of things to deliver. */ |
78ba2faf | 522 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
523 | if (intf->intf_num == -1) |
524 | continue; | |
525 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
526 | if (!e) | |
527 | goto out_err; | |
b2c03941 CM |
528 | kref_get(&intf->refcount); |
529 | e->intf = intf; | |
bca0324d CM |
530 | e->intf_num = intf->intf_num; |
531 | list_add_tail(&e->link, &to_deliver); | |
532 | } | |
1da177e4 | 533 | |
b2c03941 CM |
534 | /* We will succeed, so add it to the list. */ |
535 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
536 | |
537 | mutex_unlock(&ipmi_interfaces_mutex); | |
538 | ||
539 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
540 | list_del(&e->link); | |
b2c03941 CM |
541 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
542 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 543 | kfree(e); |
1da177e4 | 544 | } |
bca0324d | 545 | |
b2c03941 | 546 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 547 | |
1da177e4 | 548 | return 0; |
bca0324d CM |
549 | |
550 | out_err: | |
b2c03941 CM |
551 | mutex_unlock(&ipmi_interfaces_mutex); |
552 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
553 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
554 | list_del(&e->link); | |
b2c03941 | 555 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
556 | kfree(e); |
557 | } | |
558 | return -ENOMEM; | |
1da177e4 | 559 | } |
c70d7499 | 560 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
561 | |
562 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
563 | { | |
b2c03941 | 564 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 565 | list_del(&(watcher->link)); |
b2c03941 | 566 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
567 | return 0; |
568 | } | |
c70d7499 | 569 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 570 | |
b2c03941 CM |
571 | /* |
572 | * Must be called with smi_watchers_mutex held. | |
573 | */ | |
1da177e4 | 574 | static void |
50c812b2 | 575 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
576 | { |
577 | struct ipmi_smi_watcher *w; | |
578 | ||
1da177e4 LT |
579 | list_for_each_entry(w, &smi_watchers, link) { |
580 | if (try_module_get(w->owner)) { | |
50c812b2 | 581 | w->new_smi(i, dev); |
1da177e4 LT |
582 | module_put(w->owner); |
583 | } | |
584 | } | |
1da177e4 LT |
585 | } |
586 | ||
587 | static int | |
588 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
589 | { | |
590 | if (addr1->addr_type != addr2->addr_type) | |
591 | return 0; | |
592 | ||
593 | if (addr1->channel != addr2->channel) | |
594 | return 0; | |
595 | ||
596 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
597 | struct ipmi_system_interface_addr *smi_addr1 | |
598 | = (struct ipmi_system_interface_addr *) addr1; | |
599 | struct ipmi_system_interface_addr *smi_addr2 | |
600 | = (struct ipmi_system_interface_addr *) addr2; | |
601 | return (smi_addr1->lun == smi_addr2->lun); | |
602 | } | |
603 | ||
604 | if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 605 | || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
1da177e4 LT |
606 | struct ipmi_ipmb_addr *ipmb_addr1 |
607 | = (struct ipmi_ipmb_addr *) addr1; | |
608 | struct ipmi_ipmb_addr *ipmb_addr2 | |
609 | = (struct ipmi_ipmb_addr *) addr2; | |
610 | ||
611 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
612 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
613 | } | |
614 | ||
615 | if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { | |
616 | struct ipmi_lan_addr *lan_addr1 | |
617 | = (struct ipmi_lan_addr *) addr1; | |
618 | struct ipmi_lan_addr *lan_addr2 | |
619 | = (struct ipmi_lan_addr *) addr2; | |
620 | ||
621 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
622 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
623 | && (lan_addr1->session_handle | |
624 | == lan_addr2->session_handle) | |
625 | && (lan_addr1->lun == lan_addr2->lun)); | |
626 | } | |
627 | ||
628 | return 1; | |
629 | } | |
630 | ||
631 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
632 | { | |
c70d7499 | 633 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 634 | return -EINVAL; |
1da177e4 LT |
635 | |
636 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
637 | if (addr->channel != IPMI_BMC_CHANNEL) | |
638 | return -EINVAL; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 643 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
644 | || (addr->channel < 0)) |
645 | return -EINVAL; | |
646 | ||
647 | if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 CM |
648 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
649 | if (len < sizeof(struct ipmi_ipmb_addr)) | |
1da177e4 | 650 | return -EINVAL; |
1da177e4 LT |
651 | return 0; |
652 | } | |
653 | ||
654 | if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
c70d7499 | 655 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 656 | return -EINVAL; |
1da177e4 LT |
657 | return 0; |
658 | } | |
659 | ||
660 | return -EINVAL; | |
661 | } | |
c70d7499 | 662 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
663 | |
664 | unsigned int ipmi_addr_length(int addr_type) | |
665 | { | |
666 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
667 | return sizeof(struct ipmi_system_interface_addr); | |
668 | ||
669 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 670 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 671 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
672 | |
673 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
674 | return sizeof(struct ipmi_lan_addr); | |
675 | ||
676 | return 0; | |
677 | } | |
c70d7499 | 678 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
679 | |
680 | static void deliver_response(struct ipmi_recv_msg *msg) | |
681 | { | |
8a3628d5 | 682 | if (!msg->user) { |
56a55ec6 | 683 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
684 | |
685 | /* Special handling for NULL users. */ | |
686 | if (intf->null_user_handler) { | |
687 | intf->null_user_handler(intf, msg); | |
b2655f26 | 688 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
689 | } else { |
690 | /* No handler, so give up. */ | |
b2655f26 | 691 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
692 | } |
693 | ipmi_free_recv_msg(msg); | |
694 | } else { | |
393d2cc3 CM |
695 | ipmi_user_t user = msg->user; |
696 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 697 | } |
1da177e4 LT |
698 | } |
699 | ||
b2c03941 CM |
700 | static void |
701 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
702 | { | |
703 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
704 | msg->msg_data[0] = err; | |
705 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
706 | msg->msg.data_len = 1; | |
707 | msg->msg.data = msg->msg_data; | |
708 | deliver_response(msg); | |
709 | } | |
710 | ||
c70d7499 CM |
711 | /* |
712 | * Find the next sequence number not being used and add the given | |
713 | * message with the given timeout to the sequence table. This must be | |
714 | * called with the interface's seq_lock held. | |
715 | */ | |
1da177e4 LT |
716 | static int intf_next_seq(ipmi_smi_t intf, |
717 | struct ipmi_recv_msg *recv_msg, | |
718 | unsigned long timeout, | |
719 | int retries, | |
720 | int broadcast, | |
721 | unsigned char *seq, | |
722 | long *seqid) | |
723 | { | |
724 | int rv = 0; | |
725 | unsigned int i; | |
726 | ||
c70d7499 CM |
727 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
728 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 729 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
730 | break; |
731 | } | |
732 | ||
8a3628d5 | 733 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
734 | intf->seq_table[i].recv_msg = recv_msg; |
735 | ||
c70d7499 CM |
736 | /* |
737 | * Start with the maximum timeout, when the send response | |
738 | * comes in we will start the real timer. | |
739 | */ | |
1da177e4 LT |
740 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
741 | intf->seq_table[i].orig_timeout = timeout; | |
742 | intf->seq_table[i].retries_left = retries; | |
743 | intf->seq_table[i].broadcast = broadcast; | |
744 | intf->seq_table[i].inuse = 1; | |
745 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
746 | *seq = i; | |
747 | *seqid = intf->seq_table[i].seqid; | |
748 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
749 | } else { | |
750 | rv = -EAGAIN; | |
751 | } | |
c70d7499 | 752 | |
1da177e4 LT |
753 | return rv; |
754 | } | |
755 | ||
c70d7499 CM |
756 | /* |
757 | * Return the receive message for the given sequence number and | |
758 | * release the sequence number so it can be reused. Some other data | |
759 | * is passed in to be sure the message matches up correctly (to help | |
760 | * guard against message coming in after their timeout and the | |
761 | * sequence number being reused). | |
762 | */ | |
1da177e4 LT |
763 | static int intf_find_seq(ipmi_smi_t intf, |
764 | unsigned char seq, | |
765 | short channel, | |
766 | unsigned char cmd, | |
767 | unsigned char netfn, | |
768 | struct ipmi_addr *addr, | |
769 | struct ipmi_recv_msg **recv_msg) | |
770 | { | |
771 | int rv = -ENODEV; | |
772 | unsigned long flags; | |
773 | ||
774 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
775 | return -EINVAL; | |
776 | ||
777 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
778 | if (intf->seq_table[seq].inuse) { | |
779 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
780 | ||
c70d7499 CM |
781 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
782 | && (msg->msg.netfn == netfn) | |
783 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
784 | *recv_msg = msg; |
785 | intf->seq_table[seq].inuse = 0; | |
786 | rv = 0; | |
787 | } | |
788 | } | |
789 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
790 | ||
791 | return rv; | |
792 | } | |
793 | ||
794 | ||
795 | /* Start the timer for a specific sequence table entry. */ | |
796 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
797 | long msgid) | |
798 | { | |
799 | int rv = -ENODEV; | |
800 | unsigned long flags; | |
801 | unsigned char seq; | |
802 | unsigned long seqid; | |
803 | ||
804 | ||
805 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
806 | ||
807 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
808 | /* |
809 | * We do this verification because the user can be deleted | |
810 | * while a message is outstanding. | |
811 | */ | |
1da177e4 | 812 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 813 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
814 | struct seq_table *ent = &(intf->seq_table[seq]); |
815 | ent->timeout = ent->orig_timeout; | |
816 | rv = 0; | |
817 | } | |
818 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
819 | ||
820 | return rv; | |
821 | } | |
822 | ||
823 | /* Got an error for the send message for a specific sequence number. */ | |
824 | static int intf_err_seq(ipmi_smi_t intf, | |
825 | long msgid, | |
826 | unsigned int err) | |
827 | { | |
828 | int rv = -ENODEV; | |
829 | unsigned long flags; | |
830 | unsigned char seq; | |
831 | unsigned long seqid; | |
832 | struct ipmi_recv_msg *msg = NULL; | |
833 | ||
834 | ||
835 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
836 | ||
837 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
838 | /* |
839 | * We do this verification because the user can be deleted | |
840 | * while a message is outstanding. | |
841 | */ | |
1da177e4 | 842 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 843 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
844 | struct seq_table *ent = &(intf->seq_table[seq]); |
845 | ||
846 | ent->inuse = 0; | |
847 | msg = ent->recv_msg; | |
848 | rv = 0; | |
849 | } | |
850 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
851 | ||
b2c03941 CM |
852 | if (msg) |
853 | deliver_err_response(msg, err); | |
1da177e4 LT |
854 | |
855 | return rv; | |
856 | } | |
857 | ||
858 | ||
859 | int ipmi_create_user(unsigned int if_num, | |
860 | struct ipmi_user_hndl *handler, | |
861 | void *handler_data, | |
862 | ipmi_user_t *user) | |
863 | { | |
864 | unsigned long flags; | |
865 | ipmi_user_t new_user; | |
866 | int rv = 0; | |
867 | ipmi_smi_t intf; | |
868 | ||
c70d7499 CM |
869 | /* |
870 | * There is no module usecount here, because it's not | |
871 | * required. Since this can only be used by and called from | |
872 | * other modules, they will implicitly use this module, and | |
873 | * thus this can't be removed unless the other modules are | |
874 | * removed. | |
875 | */ | |
1da177e4 LT |
876 | |
877 | if (handler == NULL) | |
878 | return -EINVAL; | |
879 | ||
c70d7499 CM |
880 | /* |
881 | * Make sure the driver is actually initialized, this handles | |
882 | * problems with initialization order. | |
883 | */ | |
1da177e4 LT |
884 | if (!initialized) { |
885 | rv = ipmi_init_msghandler(); | |
886 | if (rv) | |
887 | return rv; | |
888 | ||
c70d7499 CM |
889 | /* |
890 | * The init code doesn't return an error if it was turned | |
891 | * off, but it won't initialize. Check that. | |
892 | */ | |
1da177e4 LT |
893 | if (!initialized) |
894 | return -ENODEV; | |
895 | } | |
896 | ||
897 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 898 | if (!new_user) |
1da177e4 LT |
899 | return -ENOMEM; |
900 | ||
b2c03941 | 901 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
902 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
903 | if (intf->intf_num == if_num) | |
904 | goto found; | |
1da177e4 | 905 | } |
b2c03941 | 906 | /* Not found, return an error */ |
bca0324d CM |
907 | rv = -EINVAL; |
908 | goto out_kfree; | |
1da177e4 | 909 | |
bca0324d | 910 | found: |
393d2cc3 CM |
911 | /* Note that each existing user holds a refcount to the interface. */ |
912 | kref_get(&intf->refcount); | |
1da177e4 | 913 | |
393d2cc3 | 914 | kref_init(&new_user->refcount); |
1da177e4 LT |
915 | new_user->handler = handler; |
916 | new_user->handler_data = handler_data; | |
917 | new_user->intf = intf; | |
918 | new_user->gets_events = 0; | |
919 | ||
920 | if (!try_module_get(intf->handlers->owner)) { | |
921 | rv = -ENODEV; | |
5c98d29a | 922 | goto out_kref; |
1da177e4 LT |
923 | } |
924 | ||
925 | if (intf->handlers->inc_usecount) { | |
926 | rv = intf->handlers->inc_usecount(intf->send_info); | |
927 | if (rv) { | |
928 | module_put(intf->handlers->owner); | |
5c98d29a | 929 | goto out_kref; |
1da177e4 LT |
930 | } |
931 | } | |
932 | ||
c70d7499 CM |
933 | /* |
934 | * Hold the lock so intf->handlers is guaranteed to be good | |
935 | * until now | |
936 | */ | |
b2c03941 CM |
937 | mutex_unlock(&ipmi_interfaces_mutex); |
938 | ||
393d2cc3 CM |
939 | new_user->valid = 1; |
940 | spin_lock_irqsave(&intf->seq_lock, flags); | |
941 | list_add_rcu(&new_user->link, &intf->users); | |
942 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
943 | *user = new_user; | |
944 | return 0; | |
1da177e4 | 945 | |
5c98d29a | 946 | out_kref: |
393d2cc3 | 947 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 948 | out_kfree: |
b2c03941 | 949 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 950 | kfree(new_user); |
1da177e4 LT |
951 | return rv; |
952 | } | |
c70d7499 | 953 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 954 | |
393d2cc3 CM |
955 | static void free_user(struct kref *ref) |
956 | { | |
957 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
958 | kfree(user); | |
959 | } | |
960 | ||
961 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 962 | { |
393d2cc3 | 963 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
964 | int i; |
965 | unsigned long flags; | |
393d2cc3 | 966 | struct cmd_rcvr *rcvr; |
393d2cc3 | 967 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 968 | |
8a3628d5 | 969 | user->valid = 0; |
1da177e4 | 970 | |
393d2cc3 CM |
971 | /* Remove the user from the interface's sequence table. */ |
972 | spin_lock_irqsave(&intf->seq_lock, flags); | |
973 | list_del_rcu(&user->link); | |
1da177e4 | 974 | |
e8b33617 | 975 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 976 | if (intf->seq_table[i].inuse |
c70d7499 | 977 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 978 | intf->seq_table[i].inuse = 0; |
b2c03941 | 979 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
980 | } |
981 | } | |
393d2cc3 CM |
982 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
983 | ||
984 | /* | |
985 | * Remove the user from the command receiver's table. First | |
986 | * we build a list of everything (not using the standard link, | |
987 | * since other things may be using it till we do | |
988 | * synchronize_rcu()) then free everything in that list. | |
989 | */ | |
d6dfd131 | 990 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 991 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 992 | if (rcvr->user == user) { |
393d2cc3 CM |
993 | list_del_rcu(&rcvr->link); |
994 | rcvr->next = rcvrs; | |
995 | rcvrs = rcvr; | |
1da177e4 LT |
996 | } |
997 | } | |
d6dfd131 | 998 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
999 | synchronize_rcu(); |
1000 | while (rcvrs) { | |
1001 | rcvr = rcvrs; | |
1002 | rcvrs = rcvr->next; | |
1003 | kfree(rcvr); | |
1004 | } | |
1da177e4 | 1005 | |
b2c03941 CM |
1006 | mutex_lock(&ipmi_interfaces_mutex); |
1007 | if (intf->handlers) { | |
1008 | module_put(intf->handlers->owner); | |
1009 | if (intf->handlers->dec_usecount) | |
1010 | intf->handlers->dec_usecount(intf->send_info); | |
1011 | } | |
1012 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1013 | |
393d2cc3 | 1014 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1015 | |
393d2cc3 | 1016 | kref_put(&user->refcount, free_user); |
1da177e4 | 1017 | |
8a3628d5 | 1018 | return 0; |
1da177e4 | 1019 | } |
c70d7499 | 1020 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1021 | |
1022 | void ipmi_get_version(ipmi_user_t user, | |
1023 | unsigned char *major, | |
1024 | unsigned char *minor) | |
1025 | { | |
b2c03941 CM |
1026 | *major = user->intf->ipmi_version_major; |
1027 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1028 | } |
c70d7499 | 1029 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1030 | |
c14979b9 CM |
1031 | int ipmi_set_my_address(ipmi_user_t user, |
1032 | unsigned int channel, | |
1033 | unsigned char address) | |
1da177e4 | 1034 | { |
c14979b9 CM |
1035 | if (channel >= IPMI_MAX_CHANNELS) |
1036 | return -EINVAL; | |
1037 | user->intf->channels[channel].address = address; | |
1038 | return 0; | |
1da177e4 | 1039 | } |
c70d7499 | 1040 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1041 | |
c14979b9 CM |
1042 | int ipmi_get_my_address(ipmi_user_t user, |
1043 | unsigned int channel, | |
1044 | unsigned char *address) | |
1da177e4 | 1045 | { |
c14979b9 CM |
1046 | if (channel >= IPMI_MAX_CHANNELS) |
1047 | return -EINVAL; | |
1048 | *address = user->intf->channels[channel].address; | |
1049 | return 0; | |
1da177e4 | 1050 | } |
c70d7499 | 1051 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1052 | |
c14979b9 CM |
1053 | int ipmi_set_my_LUN(ipmi_user_t user, |
1054 | unsigned int channel, | |
1055 | unsigned char LUN) | |
1da177e4 | 1056 | { |
c14979b9 CM |
1057 | if (channel >= IPMI_MAX_CHANNELS) |
1058 | return -EINVAL; | |
1059 | user->intf->channels[channel].lun = LUN & 0x3; | |
1060 | return 0; | |
1da177e4 | 1061 | } |
c70d7499 | 1062 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1063 | |
c14979b9 CM |
1064 | int ipmi_get_my_LUN(ipmi_user_t user, |
1065 | unsigned int channel, | |
1066 | unsigned char *address) | |
1da177e4 | 1067 | { |
c14979b9 CM |
1068 | if (channel >= IPMI_MAX_CHANNELS) |
1069 | return -EINVAL; | |
1070 | *address = user->intf->channels[channel].lun; | |
1071 | return 0; | |
1da177e4 | 1072 | } |
c70d7499 | 1073 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1074 | |
b9675136 CM |
1075 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1076 | { | |
1077 | int mode; | |
1078 | unsigned long flags; | |
1079 | ||
1080 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1081 | mode = user->intf->maintenance_mode; | |
1082 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1083 | ||
1084 | return mode; | |
1085 | } | |
1086 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1087 | ||
1088 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1089 | { | |
1090 | if (intf->handlers->set_maintenance_mode) | |
1091 | intf->handlers->set_maintenance_mode( | |
1092 | intf->send_info, intf->maintenance_mode_enable); | |
1093 | } | |
1094 | ||
1095 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1096 | { | |
1097 | int rv = 0; | |
1098 | unsigned long flags; | |
1099 | ipmi_smi_t intf = user->intf; | |
1100 | ||
1101 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1102 | if (intf->maintenance_mode != mode) { | |
1103 | switch (mode) { | |
1104 | case IPMI_MAINTENANCE_MODE_AUTO: | |
1105 | intf->maintenance_mode = mode; | |
1106 | intf->maintenance_mode_enable | |
1107 | = (intf->auto_maintenance_timeout > 0); | |
1108 | break; | |
1109 | ||
1110 | case IPMI_MAINTENANCE_MODE_OFF: | |
1111 | intf->maintenance_mode = mode; | |
1112 | intf->maintenance_mode_enable = 0; | |
1113 | break; | |
1114 | ||
1115 | case IPMI_MAINTENANCE_MODE_ON: | |
1116 | intf->maintenance_mode = mode; | |
1117 | intf->maintenance_mode_enable = 1; | |
1118 | break; | |
1119 | ||
1120 | default: | |
1121 | rv = -EINVAL; | |
1122 | goto out_unlock; | |
1123 | } | |
1124 | ||
1125 | maintenance_mode_update(intf); | |
1126 | } | |
1127 | out_unlock: | |
1128 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1129 | ||
1130 | return rv; | |
1131 | } | |
1132 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1133 | ||
1da177e4 LT |
1134 | int ipmi_set_gets_events(ipmi_user_t user, int val) |
1135 | { | |
393d2cc3 CM |
1136 | unsigned long flags; |
1137 | ipmi_smi_t intf = user->intf; | |
1138 | struct ipmi_recv_msg *msg, *msg2; | |
1139 | struct list_head msgs; | |
1da177e4 | 1140 | |
393d2cc3 CM |
1141 | INIT_LIST_HEAD(&msgs); |
1142 | ||
1143 | spin_lock_irqsave(&intf->events_lock, flags); | |
1da177e4 LT |
1144 | user->gets_events = val; |
1145 | ||
b2c03941 CM |
1146 | if (intf->delivering_events) |
1147 | /* | |
1148 | * Another thread is delivering events for this, so | |
1149 | * let it handle any new events. | |
1150 | */ | |
1151 | goto out; | |
1152 | ||
1153 | /* Deliver any queued events. */ | |
1154 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1155 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1156 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1157 | intf->waiting_events_count = 0; |
87ebd06f CM |
1158 | if (intf->event_msg_printed) { |
1159 | printk(KERN_WARNING PFX "Event queue no longer" | |
1160 | " full\n"); | |
1161 | intf->event_msg_printed = 0; | |
1162 | } | |
393d2cc3 | 1163 | |
b2c03941 CM |
1164 | intf->delivering_events = 1; |
1165 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1166 | ||
1167 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1168 | msg->user = user; | |
1169 | kref_get(&user->refcount); | |
1170 | deliver_response(msg); | |
1171 | } | |
1172 | ||
1173 | spin_lock_irqsave(&intf->events_lock, flags); | |
1174 | intf->delivering_events = 0; | |
393d2cc3 CM |
1175 | } |
1176 | ||
b2c03941 | 1177 | out: |
393d2cc3 | 1178 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1179 | |
1180 | return 0; | |
1181 | } | |
c70d7499 | 1182 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1183 | |
393d2cc3 CM |
1184 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1185 | unsigned char netfn, | |
c69c3127 CM |
1186 | unsigned char cmd, |
1187 | unsigned char chan) | |
393d2cc3 CM |
1188 | { |
1189 | struct cmd_rcvr *rcvr; | |
1190 | ||
1191 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1192 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1193 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1194 | return rcvr; |
1195 | } | |
1196 | return NULL; | |
1197 | } | |
1198 | ||
c69c3127 CM |
1199 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1200 | unsigned char netfn, | |
1201 | unsigned char cmd, | |
1202 | unsigned int chans) | |
1203 | { | |
1204 | struct cmd_rcvr *rcvr; | |
1205 | ||
1206 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1207 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1208 | && (rcvr->chans & chans)) | |
1209 | return 0; | |
1210 | } | |
1211 | return 1; | |
1212 | } | |
1213 | ||
1da177e4 LT |
1214 | int ipmi_register_for_cmd(ipmi_user_t user, |
1215 | unsigned char netfn, | |
c69c3127 CM |
1216 | unsigned char cmd, |
1217 | unsigned int chans) | |
1da177e4 | 1218 | { |
393d2cc3 CM |
1219 | ipmi_smi_t intf = user->intf; |
1220 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1221 | int rv = 0; |
1da177e4 LT |
1222 | |
1223 | ||
1224 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1225 | if (!rcvr) |
1da177e4 | 1226 | return -ENOMEM; |
393d2cc3 CM |
1227 | rcvr->cmd = cmd; |
1228 | rcvr->netfn = netfn; | |
c69c3127 | 1229 | rcvr->chans = chans; |
393d2cc3 | 1230 | rcvr->user = user; |
1da177e4 | 1231 | |
d6dfd131 | 1232 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1233 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1234 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1235 | rv = -EBUSY; |
1236 | goto out_unlock; | |
1da177e4 | 1237 | } |
877197ef | 1238 | |
393d2cc3 | 1239 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1240 | |
393d2cc3 | 1241 | out_unlock: |
d6dfd131 | 1242 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1243 | if (rv) |
1244 | kfree(rcvr); | |
1245 | ||
1246 | return rv; | |
1247 | } | |
c70d7499 | 1248 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1249 | |
1250 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1251 | unsigned char netfn, | |
c69c3127 CM |
1252 | unsigned char cmd, |
1253 | unsigned int chans) | |
1da177e4 | 1254 | { |
393d2cc3 CM |
1255 | ipmi_smi_t intf = user->intf; |
1256 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1257 | struct cmd_rcvr *rcvrs = NULL; |
1258 | int i, rv = -ENOENT; | |
1da177e4 | 1259 | |
d6dfd131 | 1260 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1261 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1262 | if (((1 << i) & chans) == 0) | |
1263 | continue; | |
1264 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1265 | if (rcvr == NULL) | |
1266 | continue; | |
1267 | if (rcvr->user == user) { | |
1268 | rv = 0; | |
1269 | rcvr->chans &= ~chans; | |
1270 | if (rcvr->chans == 0) { | |
1271 | list_del_rcu(&rcvr->link); | |
1272 | rcvr->next = rcvrs; | |
1273 | rcvrs = rcvr; | |
1274 | } | |
1275 | } | |
1276 | } | |
1277 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1278 | synchronize_rcu(); | |
1279 | while (rcvrs) { | |
1280 | rcvr = rcvrs; | |
1281 | rcvrs = rcvr->next; | |
393d2cc3 | 1282 | kfree(rcvr); |
1da177e4 | 1283 | } |
c69c3127 | 1284 | return rv; |
1da177e4 | 1285 | } |
c70d7499 | 1286 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1287 | |
1da177e4 LT |
1288 | static unsigned char |
1289 | ipmb_checksum(unsigned char *data, int size) | |
1290 | { | |
1291 | unsigned char csum = 0; | |
c70d7499 | 1292 | |
1da177e4 LT |
1293 | for (; size > 0; size--, data++) |
1294 | csum += *data; | |
1295 | ||
1296 | return -csum; | |
1297 | } | |
1298 | ||
1299 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1300 | struct kernel_ipmi_msg *msg, | |
1301 | struct ipmi_ipmb_addr *ipmb_addr, | |
1302 | long msgid, | |
1303 | unsigned char ipmb_seq, | |
1304 | int broadcast, | |
1305 | unsigned char source_address, | |
1306 | unsigned char source_lun) | |
1307 | { | |
1308 | int i = broadcast; | |
1309 | ||
1310 | /* Format the IPMB header data. */ | |
1311 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1312 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1313 | smi_msg->data[2] = ipmb_addr->channel; | |
1314 | if (broadcast) | |
1315 | smi_msg->data[3] = 0; | |
1316 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1317 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1318 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1319 | smi_msg->data[i+6] = source_address; | |
1320 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1321 | smi_msg->data[i+8] = msg->cmd; | |
1322 | ||
1323 | /* Now tack on the data to the message. */ | |
1324 | if (msg->data_len > 0) | |
1325 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1326 | msg->data_len); | |
1327 | smi_msg->data_size = msg->data_len + 9; | |
1328 | ||
1329 | /* Now calculate the checksum and tack it on. */ | |
1330 | smi_msg->data[i+smi_msg->data_size] | |
1331 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1332 | smi_msg->data_size-6); | |
1333 | ||
c70d7499 CM |
1334 | /* |
1335 | * Add on the checksum size and the offset from the | |
1336 | * broadcast. | |
1337 | */ | |
1da177e4 LT |
1338 | smi_msg->data_size += 1 + i; |
1339 | ||
1340 | smi_msg->msgid = msgid; | |
1341 | } | |
1342 | ||
1343 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1344 | struct kernel_ipmi_msg *msg, | |
1345 | struct ipmi_lan_addr *lan_addr, | |
1346 | long msgid, | |
1347 | unsigned char ipmb_seq, | |
1348 | unsigned char source_lun) | |
1349 | { | |
1350 | /* Format the IPMB header data. */ | |
1351 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1352 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1353 | smi_msg->data[2] = lan_addr->channel; | |
1354 | smi_msg->data[3] = lan_addr->session_handle; | |
1355 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1356 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1357 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1358 | smi_msg->data[7] = lan_addr->local_SWID; | |
1359 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1360 | smi_msg->data[9] = msg->cmd; | |
1361 | ||
1362 | /* Now tack on the data to the message. */ | |
1363 | if (msg->data_len > 0) | |
1364 | memcpy(&(smi_msg->data[10]), msg->data, | |
1365 | msg->data_len); | |
1366 | smi_msg->data_size = msg->data_len + 10; | |
1367 | ||
1368 | /* Now calculate the checksum and tack it on. */ | |
1369 | smi_msg->data[smi_msg->data_size] | |
1370 | = ipmb_checksum(&(smi_msg->data[7]), | |
1371 | smi_msg->data_size-7); | |
1372 | ||
c70d7499 CM |
1373 | /* |
1374 | * Add on the checksum size and the offset from the | |
1375 | * broadcast. | |
1376 | */ | |
1da177e4 LT |
1377 | smi_msg->data_size += 1; |
1378 | ||
1379 | smi_msg->msgid = msgid; | |
1380 | } | |
1381 | ||
c70d7499 CM |
1382 | /* |
1383 | * Separate from ipmi_request so that the user does not have to be | |
1384 | * supplied in certain circumstances (mainly at panic time). If | |
1385 | * messages are supplied, they will be freed, even if an error | |
1386 | * occurs. | |
1387 | */ | |
393d2cc3 CM |
1388 | static int i_ipmi_request(ipmi_user_t user, |
1389 | ipmi_smi_t intf, | |
1390 | struct ipmi_addr *addr, | |
1391 | long msgid, | |
1392 | struct kernel_ipmi_msg *msg, | |
1393 | void *user_msg_data, | |
1394 | void *supplied_smi, | |
1395 | struct ipmi_recv_msg *supplied_recv, | |
1396 | int priority, | |
1397 | unsigned char source_address, | |
1398 | unsigned char source_lun, | |
1399 | int retries, | |
1400 | unsigned int retry_time_ms) | |
1da177e4 | 1401 | { |
b2c03941 CM |
1402 | int rv = 0; |
1403 | struct ipmi_smi_msg *smi_msg; | |
1404 | struct ipmi_recv_msg *recv_msg; | |
1405 | unsigned long flags; | |
1406 | struct ipmi_smi_handlers *handlers; | |
1da177e4 LT |
1407 | |
1408 | ||
c70d7499 | 1409 | if (supplied_recv) |
1da177e4 | 1410 | recv_msg = supplied_recv; |
c70d7499 | 1411 | else { |
1da177e4 | 1412 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1413 | if (recv_msg == NULL) |
1da177e4 | 1414 | return -ENOMEM; |
1da177e4 LT |
1415 | } |
1416 | recv_msg->user_msg_data = user_msg_data; | |
1417 | ||
c70d7499 | 1418 | if (supplied_smi) |
1da177e4 | 1419 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1420 | else { |
1da177e4 LT |
1421 | smi_msg = ipmi_alloc_smi_msg(); |
1422 | if (smi_msg == NULL) { | |
1423 | ipmi_free_recv_msg(recv_msg); | |
1424 | return -ENOMEM; | |
1425 | } | |
1426 | } | |
1427 | ||
b2c03941 CM |
1428 | rcu_read_lock(); |
1429 | handlers = intf->handlers; | |
1430 | if (!handlers) { | |
1431 | rv = -ENODEV; | |
1432 | goto out_err; | |
1433 | } | |
1434 | ||
1da177e4 | 1435 | recv_msg->user = user; |
393d2cc3 CM |
1436 | if (user) |
1437 | kref_get(&user->refcount); | |
1da177e4 | 1438 | recv_msg->msgid = msgid; |
c70d7499 CM |
1439 | /* |
1440 | * Store the message to send in the receive message so timeout | |
1441 | * responses can get the proper response data. | |
1442 | */ | |
1da177e4 LT |
1443 | recv_msg->msg = *msg; |
1444 | ||
1445 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1446 | struct ipmi_system_interface_addr *smi_addr; | |
1447 | ||
1448 | if (msg->netfn & 1) { | |
1449 | /* Responses are not allowed to the SMI. */ | |
1450 | rv = -EINVAL; | |
1451 | goto out_err; | |
1452 | } | |
1453 | ||
1454 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1455 | if (smi_addr->lun > 3) { | |
b2655f26 | 1456 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1457 | rv = -EINVAL; |
1458 | goto out_err; | |
1459 | } | |
1460 | ||
1461 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1462 | ||
1463 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1464 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1465 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1466 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1467 | /* | |
1468 | * We don't let the user do these, since we manage | |
1469 | * the sequence numbers. | |
1470 | */ | |
b2655f26 | 1471 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1472 | rv = -EINVAL; |
1473 | goto out_err; | |
1474 | } | |
1475 | ||
b9675136 CM |
1476 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1477 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1478 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1479 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1480 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1481 | intf->auto_maintenance_timeout | |
1482 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1483 | if (!intf->maintenance_mode | |
c70d7499 | 1484 | && !intf->maintenance_mode_enable) { |
b9675136 CM |
1485 | intf->maintenance_mode_enable = 1; |
1486 | maintenance_mode_update(intf); | |
1487 | } | |
1488 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1489 | flags); | |
1490 | } | |
1491 | ||
1da177e4 | 1492 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1493 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1494 | rv = -EMSGSIZE; |
1495 | goto out_err; | |
1496 | } | |
1497 | ||
1498 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1499 | smi_msg->data[1] = msg->cmd; | |
1500 | smi_msg->msgid = msgid; | |
1501 | smi_msg->user_data = recv_msg; | |
1502 | if (msg->data_len > 0) | |
1503 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1504 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1505 | ipmi_inc_stat(intf, sent_local_commands); |
1da177e4 | 1506 | } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) |
c70d7499 | 1507 | || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { |
1da177e4 LT |
1508 | struct ipmi_ipmb_addr *ipmb_addr; |
1509 | unsigned char ipmb_seq; | |
1510 | long seqid; | |
1511 | int broadcast = 0; | |
1512 | ||
9c101fd4 | 1513 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1514 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1515 | rv = -EINVAL; |
1516 | goto out_err; | |
1517 | } | |
1518 | ||
1519 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1520 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1521 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1522 | rv = -EINVAL; |
1523 | goto out_err; | |
1524 | } | |
1525 | ||
1526 | if (retries < 0) { | |
1527 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1528 | retries = 0; /* Don't retry broadcasts. */ | |
1529 | else | |
1530 | retries = 4; | |
1531 | } | |
1532 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1533 | /* |
1534 | * Broadcasts add a zero at the beginning of the | |
1535 | * message, but otherwise is the same as an IPMB | |
1536 | * address. | |
1537 | */ | |
1da177e4 LT |
1538 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1539 | broadcast = 1; | |
1540 | } | |
1541 | ||
1542 | ||
1543 | /* Default to 1 second retries. */ | |
1544 | if (retry_time_ms == 0) | |
1545 | retry_time_ms = 1000; | |
1546 | ||
c70d7499 CM |
1547 | /* |
1548 | * 9 for the header and 1 for the checksum, plus | |
1549 | * possibly one for the broadcast. | |
1550 | */ | |
1da177e4 | 1551 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1552 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1553 | rv = -EMSGSIZE; |
1554 | goto out_err; | |
1555 | } | |
1556 | ||
1557 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1558 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1559 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1560 | rv = -EINVAL; |
1561 | goto out_err; | |
1562 | } | |
1563 | ||
1564 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1565 | ||
1566 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1567 | /* |
1568 | * It's a response, so use the user's sequence | |
1569 | * from msgid. | |
1570 | */ | |
b2655f26 | 1571 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1572 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1573 | msgid, broadcast, | |
1574 | source_address, source_lun); | |
1575 | ||
c70d7499 CM |
1576 | /* |
1577 | * Save the receive message so we can use it | |
1578 | * to deliver the response. | |
1579 | */ | |
1da177e4 LT |
1580 | smi_msg->user_data = recv_msg; |
1581 | } else { | |
1582 | /* It's a command, so get a sequence for it. */ | |
1583 | ||
1584 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1585 | ||
b2655f26 | 1586 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1da177e4 | 1587 | |
c70d7499 CM |
1588 | /* |
1589 | * Create a sequence number with a 1 second | |
1590 | * timeout and 4 retries. | |
1591 | */ | |
1da177e4 LT |
1592 | rv = intf_next_seq(intf, |
1593 | recv_msg, | |
1594 | retry_time_ms, | |
1595 | retries, | |
1596 | broadcast, | |
1597 | &ipmb_seq, | |
1598 | &seqid); | |
1599 | if (rv) { | |
c70d7499 CM |
1600 | /* |
1601 | * We have used up all the sequence numbers, | |
1602 | * probably, so abort. | |
1603 | */ | |
1da177e4 LT |
1604 | spin_unlock_irqrestore(&(intf->seq_lock), |
1605 | flags); | |
1606 | goto out_err; | |
1607 | } | |
1608 | ||
c70d7499 CM |
1609 | /* |
1610 | * Store the sequence number in the message, | |
1611 | * so that when the send message response | |
1612 | * comes back we can start the timer. | |
1613 | */ | |
1da177e4 LT |
1614 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1615 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1616 | ipmb_seq, broadcast, | |
1617 | source_address, source_lun); | |
1618 | ||
c70d7499 CM |
1619 | /* |
1620 | * Copy the message into the recv message data, so we | |
1621 | * can retransmit it later if necessary. | |
1622 | */ | |
1da177e4 LT |
1623 | memcpy(recv_msg->msg_data, smi_msg->data, |
1624 | smi_msg->data_size); | |
1625 | recv_msg->msg.data = recv_msg->msg_data; | |
1626 | recv_msg->msg.data_len = smi_msg->data_size; | |
1627 | ||
c70d7499 CM |
1628 | /* |
1629 | * We don't unlock until here, because we need | |
1630 | * to copy the completed message into the | |
1631 | * recv_msg before we release the lock. | |
1632 | * Otherwise, race conditions may bite us. I | |
1633 | * know that's pretty paranoid, but I prefer | |
1634 | * to be correct. | |
1635 | */ | |
1da177e4 LT |
1636 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1637 | } | |
1638 | } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { | |
1639 | struct ipmi_lan_addr *lan_addr; | |
1640 | unsigned char ipmb_seq; | |
1641 | long seqid; | |
1642 | ||
12fc1d7b | 1643 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1644 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1645 | rv = -EINVAL; |
1646 | goto out_err; | |
1647 | } | |
1648 | ||
1649 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1650 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1651 | && (intf->channels[addr->channel].medium |
c70d7499 | 1652 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1653 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1654 | rv = -EINVAL; |
1655 | goto out_err; | |
1656 | } | |
1657 | ||
1658 | retries = 4; | |
1659 | ||
1660 | /* Default to 1 second retries. */ | |
1661 | if (retry_time_ms == 0) | |
1662 | retry_time_ms = 1000; | |
1663 | ||
1664 | /* 11 for the header and 1 for the checksum. */ | |
1665 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1666 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1667 | rv = -EMSGSIZE; |
1668 | goto out_err; | |
1669 | } | |
1670 | ||
1671 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1672 | if (lan_addr->lun > 3) { | |
b2655f26 | 1673 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1674 | rv = -EINVAL; |
1675 | goto out_err; | |
1676 | } | |
1677 | ||
1678 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1679 | ||
1680 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1681 | /* |
1682 | * It's a response, so use the user's sequence | |
1683 | * from msgid. | |
1684 | */ | |
b2655f26 | 1685 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1686 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1687 | msgid, source_lun); | |
1688 | ||
c70d7499 CM |
1689 | /* |
1690 | * Save the receive message so we can use it | |
1691 | * to deliver the response. | |
1692 | */ | |
1da177e4 LT |
1693 | smi_msg->user_data = recv_msg; |
1694 | } else { | |
1695 | /* It's a command, so get a sequence for it. */ | |
1696 | ||
1697 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1698 | ||
b2655f26 | 1699 | ipmi_inc_stat(intf, sent_lan_commands); |
1da177e4 | 1700 | |
c70d7499 CM |
1701 | /* |
1702 | * Create a sequence number with a 1 second | |
1703 | * timeout and 4 retries. | |
1704 | */ | |
1da177e4 LT |
1705 | rv = intf_next_seq(intf, |
1706 | recv_msg, | |
1707 | retry_time_ms, | |
1708 | retries, | |
1709 | 0, | |
1710 | &ipmb_seq, | |
1711 | &seqid); | |
1712 | if (rv) { | |
c70d7499 CM |
1713 | /* |
1714 | * We have used up all the sequence numbers, | |
1715 | * probably, so abort. | |
1716 | */ | |
1da177e4 LT |
1717 | spin_unlock_irqrestore(&(intf->seq_lock), |
1718 | flags); | |
1719 | goto out_err; | |
1720 | } | |
1721 | ||
c70d7499 CM |
1722 | /* |
1723 | * Store the sequence number in the message, | |
1724 | * so that when the send message response | |
1725 | * comes back we can start the timer. | |
1726 | */ | |
1da177e4 LT |
1727 | format_lan_msg(smi_msg, msg, lan_addr, |
1728 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1729 | ipmb_seq, source_lun); | |
1730 | ||
c70d7499 CM |
1731 | /* |
1732 | * Copy the message into the recv message data, so we | |
1733 | * can retransmit it later if necessary. | |
1734 | */ | |
1da177e4 LT |
1735 | memcpy(recv_msg->msg_data, smi_msg->data, |
1736 | smi_msg->data_size); | |
1737 | recv_msg->msg.data = recv_msg->msg_data; | |
1738 | recv_msg->msg.data_len = smi_msg->data_size; | |
1739 | ||
c70d7499 CM |
1740 | /* |
1741 | * We don't unlock until here, because we need | |
1742 | * to copy the completed message into the | |
1743 | * recv_msg before we release the lock. | |
1744 | * Otherwise, race conditions may bite us. I | |
1745 | * know that's pretty paranoid, but I prefer | |
1746 | * to be correct. | |
1747 | */ | |
1da177e4 LT |
1748 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1749 | } | |
1750 | } else { | |
1751 | /* Unknown address type. */ | |
b2655f26 | 1752 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1753 | rv = -EINVAL; |
1754 | goto out_err; | |
1755 | } | |
1756 | ||
1757 | #ifdef DEBUG_MSGING | |
1758 | { | |
1759 | int m; | |
e8b33617 | 1760 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1761 | printk(" %2.2x", smi_msg->data[m]); |
1762 | printk("\n"); | |
1763 | } | |
1764 | #endif | |
b2c03941 CM |
1765 | |
1766 | handlers->sender(intf->send_info, smi_msg, priority); | |
1767 | rcu_read_unlock(); | |
1da177e4 LT |
1768 | |
1769 | return 0; | |
1770 | ||
1771 | out_err: | |
b2c03941 | 1772 | rcu_read_unlock(); |
1da177e4 LT |
1773 | ipmi_free_smi_msg(smi_msg); |
1774 | ipmi_free_recv_msg(recv_msg); | |
1775 | return rv; | |
1776 | } | |
1777 | ||
c14979b9 CM |
1778 | static int check_addr(ipmi_smi_t intf, |
1779 | struct ipmi_addr *addr, | |
1780 | unsigned char *saddr, | |
1781 | unsigned char *lun) | |
1782 | { | |
1783 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1784 | return -EINVAL; | |
1785 | *lun = intf->channels[addr->channel].lun; | |
1786 | *saddr = intf->channels[addr->channel].address; | |
1787 | return 0; | |
1788 | } | |
1789 | ||
1da177e4 LT |
1790 | int ipmi_request_settime(ipmi_user_t user, |
1791 | struct ipmi_addr *addr, | |
1792 | long msgid, | |
1793 | struct kernel_ipmi_msg *msg, | |
1794 | void *user_msg_data, | |
1795 | int priority, | |
1796 | int retries, | |
1797 | unsigned int retry_time_ms) | |
1798 | { | |
c14979b9 CM |
1799 | unsigned char saddr, lun; |
1800 | int rv; | |
1801 | ||
8a3628d5 | 1802 | if (!user) |
56a55ec6 | 1803 | return -EINVAL; |
c14979b9 CM |
1804 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1805 | if (rv) | |
1806 | return rv; | |
1da177e4 LT |
1807 | return i_ipmi_request(user, |
1808 | user->intf, | |
1809 | addr, | |
1810 | msgid, | |
1811 | msg, | |
1812 | user_msg_data, | |
1813 | NULL, NULL, | |
1814 | priority, | |
c14979b9 CM |
1815 | saddr, |
1816 | lun, | |
1da177e4 LT |
1817 | retries, |
1818 | retry_time_ms); | |
1819 | } | |
c70d7499 | 1820 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
1821 | |
1822 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1823 | struct ipmi_addr *addr, | |
1824 | long msgid, | |
1825 | struct kernel_ipmi_msg *msg, | |
1826 | void *user_msg_data, | |
1827 | void *supplied_smi, | |
1828 | struct ipmi_recv_msg *supplied_recv, | |
1829 | int priority) | |
1830 | { | |
c14979b9 CM |
1831 | unsigned char saddr, lun; |
1832 | int rv; | |
1833 | ||
8a3628d5 | 1834 | if (!user) |
56a55ec6 | 1835 | return -EINVAL; |
c14979b9 CM |
1836 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1837 | if (rv) | |
1838 | return rv; | |
1da177e4 LT |
1839 | return i_ipmi_request(user, |
1840 | user->intf, | |
1841 | addr, | |
1842 | msgid, | |
1843 | msg, | |
1844 | user_msg_data, | |
1845 | supplied_smi, | |
1846 | supplied_recv, | |
1847 | priority, | |
c14979b9 CM |
1848 | saddr, |
1849 | lun, | |
1da177e4 LT |
1850 | -1, 0); |
1851 | } | |
c70d7499 | 1852 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 1853 | |
1aa16eea | 1854 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1855 | static int ipmb_file_read_proc(char *page, char **start, off_t off, |
1856 | int count, int *eof, void *data) | |
1857 | { | |
1858 | char *out = (char *) page; | |
1859 | ipmi_smi_t intf = data; | |
c14979b9 | 1860 | int i; |
8a3628d5 | 1861 | int rv = 0; |
1da177e4 | 1862 | |
e8b33617 | 1863 | for (i = 0; i < IPMI_MAX_CHANNELS; i++) |
c14979b9 CM |
1864 | rv += sprintf(out+rv, "%x ", intf->channels[i].address); |
1865 | out[rv-1] = '\n'; /* Replace the final space with a newline */ | |
1866 | out[rv] = '\0'; | |
1867 | rv++; | |
1868 | return rv; | |
1da177e4 LT |
1869 | } |
1870 | ||
1871 | static int version_file_read_proc(char *page, char **start, off_t off, | |
1872 | int count, int *eof, void *data) | |
1873 | { | |
1874 | char *out = (char *) page; | |
1875 | ipmi_smi_t intf = data; | |
1876 | ||
b2655f26 | 1877 | return sprintf(out, "%u.%u\n", |
50c812b2 CM |
1878 | ipmi_version_major(&intf->bmc->id), |
1879 | ipmi_version_minor(&intf->bmc->id)); | |
1da177e4 LT |
1880 | } |
1881 | ||
1882 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
1883 | int count, int *eof, void *data) | |
1884 | { | |
1885 | char *out = (char *) page; | |
1886 | ipmi_smi_t intf = data; | |
1887 | ||
b2655f26 KB |
1888 | out += sprintf(out, "sent_invalid_commands: %u\n", |
1889 | ipmi_get_stat(intf, sent_invalid_commands)); | |
1890 | out += sprintf(out, "sent_local_commands: %u\n", | |
1891 | ipmi_get_stat(intf, sent_local_commands)); | |
1892 | out += sprintf(out, "handled_local_responses: %u\n", | |
1893 | ipmi_get_stat(intf, handled_local_responses)); | |
1894 | out += sprintf(out, "unhandled_local_responses: %u\n", | |
1895 | ipmi_get_stat(intf, unhandled_local_responses)); | |
1896 | out += sprintf(out, "sent_ipmb_commands: %u\n", | |
1897 | ipmi_get_stat(intf, sent_ipmb_commands)); | |
1898 | out += sprintf(out, "sent_ipmb_command_errs: %u\n", | |
1899 | ipmi_get_stat(intf, sent_ipmb_command_errs)); | |
1900 | out += sprintf(out, "retransmitted_ipmb_commands: %u\n", | |
1901 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); | |
1902 | out += sprintf(out, "timed_out_ipmb_commands: %u\n", | |
1903 | ipmi_get_stat(intf, timed_out_ipmb_commands)); | |
1904 | out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n", | |
1905 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); | |
1906 | out += sprintf(out, "sent_ipmb_responses: %u\n", | |
1907 | ipmi_get_stat(intf, sent_ipmb_responses)); | |
1908 | out += sprintf(out, "handled_ipmb_responses: %u\n", | |
1909 | ipmi_get_stat(intf, handled_ipmb_responses)); | |
1910 | out += sprintf(out, "invalid_ipmb_responses: %u\n", | |
1911 | ipmi_get_stat(intf, invalid_ipmb_responses)); | |
1912 | out += sprintf(out, "unhandled_ipmb_responses: %u\n", | |
1913 | ipmi_get_stat(intf, unhandled_ipmb_responses)); | |
1914 | out += sprintf(out, "sent_lan_commands: %u\n", | |
1915 | ipmi_get_stat(intf, sent_lan_commands)); | |
1916 | out += sprintf(out, "sent_lan_command_errs: %u\n", | |
1917 | ipmi_get_stat(intf, sent_lan_command_errs)); | |
1918 | out += sprintf(out, "retransmitted_lan_commands: %u\n", | |
1919 | ipmi_get_stat(intf, retransmitted_lan_commands)); | |
1920 | out += sprintf(out, "timed_out_lan_commands: %u\n", | |
1921 | ipmi_get_stat(intf, timed_out_lan_commands)); | |
1922 | out += sprintf(out, "sent_lan_responses: %u\n", | |
1923 | ipmi_get_stat(intf, sent_lan_responses)); | |
1924 | out += sprintf(out, "handled_lan_responses: %u\n", | |
1925 | ipmi_get_stat(intf, handled_lan_responses)); | |
1926 | out += sprintf(out, "invalid_lan_responses: %u\n", | |
1927 | ipmi_get_stat(intf, invalid_lan_responses)); | |
1928 | out += sprintf(out, "unhandled_lan_responses: %u\n", | |
1929 | ipmi_get_stat(intf, unhandled_lan_responses)); | |
1930 | out += sprintf(out, "handled_commands: %u\n", | |
1931 | ipmi_get_stat(intf, handled_commands)); | |
1932 | out += sprintf(out, "invalid_commands: %u\n", | |
1933 | ipmi_get_stat(intf, invalid_commands)); | |
1934 | out += sprintf(out, "unhandled_commands: %u\n", | |
1935 | ipmi_get_stat(intf, unhandled_commands)); | |
1936 | out += sprintf(out, "invalid_events: %u\n", | |
1937 | ipmi_get_stat(intf, invalid_events)); | |
1938 | out += sprintf(out, "events: %u\n", | |
1939 | ipmi_get_stat(intf, events)); | |
1da177e4 LT |
1940 | |
1941 | return (out - ((char *) page)); | |
1942 | } | |
1aa16eea | 1943 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1944 | |
1945 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
fa68be0d | 1946 | read_proc_t *read_proc, |
99b76233 | 1947 | void *data) |
1da177e4 | 1948 | { |
1da177e4 | 1949 | int rv = 0; |
3b625943 CM |
1950 | #ifdef CONFIG_PROC_FS |
1951 | struct proc_dir_entry *file; | |
1da177e4 LT |
1952 | struct ipmi_proc_entry *entry; |
1953 | ||
1954 | /* Create a list element. */ | |
1955 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
1956 | if (!entry) | |
1957 | return -ENOMEM; | |
1958 | entry->name = kmalloc(strlen(name)+1, GFP_KERNEL); | |
1959 | if (!entry->name) { | |
1960 | kfree(entry); | |
1961 | return -ENOMEM; | |
1962 | } | |
1963 | strcpy(entry->name, name); | |
1964 | ||
1965 | file = create_proc_entry(name, 0, smi->proc_dir); | |
1966 | if (!file) { | |
1967 | kfree(entry->name); | |
1968 | kfree(entry); | |
1969 | rv = -ENOMEM; | |
1970 | } else { | |
1da177e4 LT |
1971 | file->data = data; |
1972 | file->read_proc = read_proc; | |
1da177e4 | 1973 | |
ac019151 | 1974 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
1975 | /* Stick it on the list. */ |
1976 | entry->next = smi->proc_entries; | |
1977 | smi->proc_entries = entry; | |
ac019151 | 1978 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 1979 | } |
3b625943 | 1980 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
1981 | |
1982 | return rv; | |
1983 | } | |
c70d7499 | 1984 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
1985 | |
1986 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
1987 | { | |
1988 | int rv = 0; | |
1989 | ||
3b625943 | 1990 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1991 | sprintf(smi->proc_dir_name, "%d", num); |
1992 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
1993 | if (!smi->proc_dir) | |
1994 | rv = -ENOMEM; | |
1da177e4 LT |
1995 | |
1996 | if (rv == 0) | |
1997 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
fa68be0d | 1998 | stat_file_read_proc, |
99b76233 | 1999 | smi); |
1da177e4 LT |
2000 | |
2001 | if (rv == 0) | |
2002 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
fa68be0d | 2003 | ipmb_file_read_proc, |
99b76233 | 2004 | smi); |
1da177e4 LT |
2005 | |
2006 | if (rv == 0) | |
2007 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
fa68be0d | 2008 | version_file_read_proc, |
99b76233 | 2009 | smi); |
3b625943 | 2010 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2011 | |
2012 | return rv; | |
2013 | } | |
2014 | ||
2015 | static void remove_proc_entries(ipmi_smi_t smi) | |
2016 | { | |
3b625943 | 2017 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2018 | struct ipmi_proc_entry *entry; |
2019 | ||
ac019151 | 2020 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2021 | while (smi->proc_entries) { |
2022 | entry = smi->proc_entries; | |
2023 | smi->proc_entries = entry->next; | |
2024 | ||
2025 | remove_proc_entry(entry->name, smi->proc_dir); | |
2026 | kfree(entry->name); | |
2027 | kfree(entry); | |
2028 | } | |
ac019151 | 2029 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2030 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2031 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2032 | } |
2033 | ||
50c812b2 CM |
2034 | static int __find_bmc_guid(struct device *dev, void *data) |
2035 | { | |
2036 | unsigned char *id = data; | |
2037 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2038 | return memcmp(bmc->guid, id, 16) == 0; | |
2039 | } | |
2040 | ||
2041 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2042 | unsigned char *guid) | |
2043 | { | |
2044 | struct device *dev; | |
2045 | ||
2046 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2047 | if (dev) | |
2048 | return dev_get_drvdata(dev); | |
2049 | else | |
2050 | return NULL; | |
2051 | } | |
2052 | ||
2053 | struct prod_dev_id { | |
2054 | unsigned int product_id; | |
2055 | unsigned char device_id; | |
2056 | }; | |
2057 | ||
2058 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2059 | { | |
2060 | struct prod_dev_id *id = data; | |
2061 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2062 | ||
2063 | return (bmc->id.product_id == id->product_id | |
50c812b2 CM |
2064 | && bmc->id.device_id == id->device_id); |
2065 | } | |
2066 | ||
2067 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2068 | struct device_driver *drv, | |
f0b55da0 | 2069 | unsigned int product_id, unsigned char device_id) |
50c812b2 CM |
2070 | { |
2071 | struct prod_dev_id id = { | |
2072 | .product_id = product_id, | |
2073 | .device_id = device_id, | |
2074 | }; | |
2075 | struct device *dev; | |
2076 | ||
2077 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2078 | if (dev) | |
2079 | return dev_get_drvdata(dev); | |
2080 | else | |
2081 | return NULL; | |
2082 | } | |
2083 | ||
2084 | static ssize_t device_id_show(struct device *dev, | |
2085 | struct device_attribute *attr, | |
2086 | char *buf) | |
2087 | { | |
2088 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2089 | ||
2090 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2091 | } | |
2092 | ||
2093 | static ssize_t provides_dev_sdrs_show(struct device *dev, | |
2094 | struct device_attribute *attr, | |
2095 | char *buf) | |
2096 | { | |
2097 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2098 | ||
2099 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2100 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 CM |
2101 | } |
2102 | ||
2103 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2104 | char *buf) | |
2105 | { | |
2106 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2107 | ||
2108 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2109 | bmc->id.device_revision & 0x0F); |
50c812b2 CM |
2110 | } |
2111 | ||
2112 | static ssize_t firmware_rev_show(struct device *dev, | |
2113 | struct device_attribute *attr, | |
2114 | char *buf) | |
2115 | { | |
2116 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2117 | ||
2118 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2119 | bmc->id.firmware_revision_2); | |
2120 | } | |
2121 | ||
2122 | static ssize_t ipmi_version_show(struct device *dev, | |
2123 | struct device_attribute *attr, | |
2124 | char *buf) | |
2125 | { | |
2126 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2127 | ||
2128 | return snprintf(buf, 20, "%u.%u\n", | |
2129 | ipmi_version_major(&bmc->id), | |
2130 | ipmi_version_minor(&bmc->id)); | |
2131 | } | |
2132 | ||
2133 | static ssize_t add_dev_support_show(struct device *dev, | |
2134 | struct device_attribute *attr, | |
2135 | char *buf) | |
2136 | { | |
2137 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2138 | ||
2139 | return snprintf(buf, 10, "0x%02x\n", | |
2140 | bmc->id.additional_device_support); | |
2141 | } | |
2142 | ||
2143 | static ssize_t manufacturer_id_show(struct device *dev, | |
2144 | struct device_attribute *attr, | |
2145 | char *buf) | |
2146 | { | |
2147 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2148 | ||
2149 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2150 | } | |
2151 | ||
2152 | static ssize_t product_id_show(struct device *dev, | |
2153 | struct device_attribute *attr, | |
2154 | char *buf) | |
2155 | { | |
2156 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2157 | ||
2158 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2159 | } | |
2160 | ||
2161 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2162 | struct device_attribute *attr, | |
2163 | char *buf) | |
2164 | { | |
2165 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2166 | ||
2167 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2168 | bmc->id.aux_firmware_revision[3], | |
2169 | bmc->id.aux_firmware_revision[2], | |
2170 | bmc->id.aux_firmware_revision[1], | |
2171 | bmc->id.aux_firmware_revision[0]); | |
2172 | } | |
2173 | ||
2174 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2175 | char *buf) | |
2176 | { | |
2177 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2178 | ||
2179 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2180 | (long long) bmc->guid[0], | |
2181 | (long long) bmc->guid[8]); | |
2182 | } | |
2183 | ||
5e59393e | 2184 | static void remove_files(struct bmc_device *bmc) |
50c812b2 | 2185 | { |
f0b55da0 CM |
2186 | if (!bmc->dev) |
2187 | return; | |
2188 | ||
50c812b2 CM |
2189 | device_remove_file(&bmc->dev->dev, |
2190 | &bmc->device_id_attr); | |
2191 | device_remove_file(&bmc->dev->dev, | |
2192 | &bmc->provides_dev_sdrs_attr); | |
2193 | device_remove_file(&bmc->dev->dev, | |
2194 | &bmc->revision_attr); | |
2195 | device_remove_file(&bmc->dev->dev, | |
2196 | &bmc->firmware_rev_attr); | |
2197 | device_remove_file(&bmc->dev->dev, | |
2198 | &bmc->version_attr); | |
2199 | device_remove_file(&bmc->dev->dev, | |
2200 | &bmc->add_dev_support_attr); | |
2201 | device_remove_file(&bmc->dev->dev, | |
2202 | &bmc->manufacturer_id_attr); | |
2203 | device_remove_file(&bmc->dev->dev, | |
2204 | &bmc->product_id_attr); | |
5e59393e | 2205 | |
50c812b2 CM |
2206 | if (bmc->id.aux_firmware_revision_set) |
2207 | device_remove_file(&bmc->dev->dev, | |
2208 | &bmc->aux_firmware_rev_attr); | |
2209 | if (bmc->guid_set) | |
2210 | device_remove_file(&bmc->dev->dev, | |
2211 | &bmc->guid_attr); | |
5e59393e JG |
2212 | } |
2213 | ||
2214 | static void | |
2215 | cleanup_bmc_device(struct kref *ref) | |
2216 | { | |
2217 | struct bmc_device *bmc; | |
2218 | ||
2219 | bmc = container_of(ref, struct bmc_device, refcount); | |
2220 | ||
2221 | remove_files(bmc); | |
1d5636cc | 2222 | platform_device_unregister(bmc->dev); |
50c812b2 CM |
2223 | kfree(bmc); |
2224 | } | |
2225 | ||
2226 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2227 | { | |
2228 | struct bmc_device *bmc = intf->bmc; | |
2229 | ||
759643b8 CM |
2230 | if (intf->sysfs_name) { |
2231 | sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name); | |
2232 | kfree(intf->sysfs_name); | |
2233 | intf->sysfs_name = NULL; | |
2234 | } | |
50c812b2 CM |
2235 | if (intf->my_dev_name) { |
2236 | sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name); | |
2237 | kfree(intf->my_dev_name); | |
2238 | intf->my_dev_name = NULL; | |
2239 | } | |
2240 | ||
2241 | mutex_lock(&ipmidriver_mutex); | |
2242 | kref_put(&bmc->refcount, cleanup_bmc_device); | |
f0b55da0 | 2243 | intf->bmc = NULL; |
50c812b2 CM |
2244 | mutex_unlock(&ipmidriver_mutex); |
2245 | } | |
2246 | ||
5e59393e JG |
2247 | static int create_files(struct bmc_device *bmc) |
2248 | { | |
2249 | int err; | |
2250 | ||
f0b55da0 | 2251 | bmc->device_id_attr.attr.name = "device_id"; |
f0b55da0 CM |
2252 | bmc->device_id_attr.attr.mode = S_IRUGO; |
2253 | bmc->device_id_attr.show = device_id_show; | |
2254 | ||
2255 | bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs"; | |
f0b55da0 CM |
2256 | bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO; |
2257 | bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show; | |
2258 | ||
2259 | bmc->revision_attr.attr.name = "revision"; | |
f0b55da0 CM |
2260 | bmc->revision_attr.attr.mode = S_IRUGO; |
2261 | bmc->revision_attr.show = revision_show; | |
2262 | ||
2263 | bmc->firmware_rev_attr.attr.name = "firmware_revision"; | |
f0b55da0 CM |
2264 | bmc->firmware_rev_attr.attr.mode = S_IRUGO; |
2265 | bmc->firmware_rev_attr.show = firmware_rev_show; | |
2266 | ||
2267 | bmc->version_attr.attr.name = "ipmi_version"; | |
f0b55da0 CM |
2268 | bmc->version_attr.attr.mode = S_IRUGO; |
2269 | bmc->version_attr.show = ipmi_version_show; | |
2270 | ||
2271 | bmc->add_dev_support_attr.attr.name = "additional_device_support"; | |
f0b55da0 CM |
2272 | bmc->add_dev_support_attr.attr.mode = S_IRUGO; |
2273 | bmc->add_dev_support_attr.show = add_dev_support_show; | |
2274 | ||
2275 | bmc->manufacturer_id_attr.attr.name = "manufacturer_id"; | |
f0b55da0 CM |
2276 | bmc->manufacturer_id_attr.attr.mode = S_IRUGO; |
2277 | bmc->manufacturer_id_attr.show = manufacturer_id_show; | |
2278 | ||
2279 | bmc->product_id_attr.attr.name = "product_id"; | |
f0b55da0 CM |
2280 | bmc->product_id_attr.attr.mode = S_IRUGO; |
2281 | bmc->product_id_attr.show = product_id_show; | |
2282 | ||
2283 | bmc->guid_attr.attr.name = "guid"; | |
f0b55da0 CM |
2284 | bmc->guid_attr.attr.mode = S_IRUGO; |
2285 | bmc->guid_attr.show = guid_show; | |
2286 | ||
2287 | bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision"; | |
f0b55da0 CM |
2288 | bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO; |
2289 | bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show; | |
2290 | ||
5e59393e JG |
2291 | err = device_create_file(&bmc->dev->dev, |
2292 | &bmc->device_id_attr); | |
c70d7499 CM |
2293 | if (err) |
2294 | goto out; | |
5e59393e JG |
2295 | err = device_create_file(&bmc->dev->dev, |
2296 | &bmc->provides_dev_sdrs_attr); | |
c70d7499 CM |
2297 | if (err) |
2298 | goto out_devid; | |
5e59393e JG |
2299 | err = device_create_file(&bmc->dev->dev, |
2300 | &bmc->revision_attr); | |
c70d7499 CM |
2301 | if (err) |
2302 | goto out_sdrs; | |
5e59393e JG |
2303 | err = device_create_file(&bmc->dev->dev, |
2304 | &bmc->firmware_rev_attr); | |
c70d7499 CM |
2305 | if (err) |
2306 | goto out_rev; | |
5e59393e JG |
2307 | err = device_create_file(&bmc->dev->dev, |
2308 | &bmc->version_attr); | |
c70d7499 CM |
2309 | if (err) |
2310 | goto out_firm; | |
5e59393e JG |
2311 | err = device_create_file(&bmc->dev->dev, |
2312 | &bmc->add_dev_support_attr); | |
c70d7499 CM |
2313 | if (err) |
2314 | goto out_version; | |
5e59393e JG |
2315 | err = device_create_file(&bmc->dev->dev, |
2316 | &bmc->manufacturer_id_attr); | |
c70d7499 CM |
2317 | if (err) |
2318 | goto out_add_dev; | |
5e59393e JG |
2319 | err = device_create_file(&bmc->dev->dev, |
2320 | &bmc->product_id_attr); | |
c70d7499 CM |
2321 | if (err) |
2322 | goto out_manu; | |
5e59393e JG |
2323 | if (bmc->id.aux_firmware_revision_set) { |
2324 | err = device_create_file(&bmc->dev->dev, | |
2325 | &bmc->aux_firmware_rev_attr); | |
c70d7499 CM |
2326 | if (err) |
2327 | goto out_prod_id; | |
5e59393e JG |
2328 | } |
2329 | if (bmc->guid_set) { | |
2330 | err = device_create_file(&bmc->dev->dev, | |
2331 | &bmc->guid_attr); | |
c70d7499 CM |
2332 | if (err) |
2333 | goto out_aux_firm; | |
5e59393e JG |
2334 | } |
2335 | ||
2336 | return 0; | |
2337 | ||
2338 | out_aux_firm: | |
2339 | if (bmc->id.aux_firmware_revision_set) | |
2340 | device_remove_file(&bmc->dev->dev, | |
2341 | &bmc->aux_firmware_rev_attr); | |
2342 | out_prod_id: | |
2343 | device_remove_file(&bmc->dev->dev, | |
2344 | &bmc->product_id_attr); | |
2345 | out_manu: | |
2346 | device_remove_file(&bmc->dev->dev, | |
2347 | &bmc->manufacturer_id_attr); | |
2348 | out_add_dev: | |
2349 | device_remove_file(&bmc->dev->dev, | |
2350 | &bmc->add_dev_support_attr); | |
2351 | out_version: | |
2352 | device_remove_file(&bmc->dev->dev, | |
2353 | &bmc->version_attr); | |
2354 | out_firm: | |
2355 | device_remove_file(&bmc->dev->dev, | |
2356 | &bmc->firmware_rev_attr); | |
2357 | out_rev: | |
2358 | device_remove_file(&bmc->dev->dev, | |
2359 | &bmc->revision_attr); | |
2360 | out_sdrs: | |
2361 | device_remove_file(&bmc->dev->dev, | |
2362 | &bmc->provides_dev_sdrs_attr); | |
2363 | out_devid: | |
2364 | device_remove_file(&bmc->dev->dev, | |
2365 | &bmc->device_id_attr); | |
2366 | out: | |
2367 | return err; | |
2368 | } | |
2369 | ||
759643b8 CM |
2370 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum, |
2371 | const char *sysfs_name) | |
50c812b2 CM |
2372 | { |
2373 | int rv; | |
2374 | struct bmc_device *bmc = intf->bmc; | |
2375 | struct bmc_device *old_bmc; | |
2376 | int size; | |
2377 | char dummy[1]; | |
2378 | ||
2379 | mutex_lock(&ipmidriver_mutex); | |
2380 | ||
2381 | /* | |
2382 | * Try to find if there is an bmc_device struct | |
2383 | * representing the interfaced BMC already | |
2384 | */ | |
2385 | if (bmc->guid_set) | |
fe2d5ffc | 2386 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2387 | else |
fe2d5ffc | 2388 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2389 | bmc->id.product_id, |
2390 | bmc->id.device_id); | |
2391 | ||
2392 | /* | |
2393 | * If there is already an bmc_device, free the new one, | |
2394 | * otherwise register the new BMC device | |
2395 | */ | |
2396 | if (old_bmc) { | |
2397 | kfree(bmc); | |
2398 | intf->bmc = old_bmc; | |
2399 | bmc = old_bmc; | |
2400 | ||
2401 | kref_get(&bmc->refcount); | |
2402 | mutex_unlock(&ipmidriver_mutex); | |
2403 | ||
2404 | printk(KERN_INFO | |
2405 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2406 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2407 | bmc->id.manufacturer_id, | |
2408 | bmc->id.product_id, | |
2409 | bmc->id.device_id); | |
2410 | } else { | |
f0b55da0 CM |
2411 | char name[14]; |
2412 | unsigned char orig_dev_id = bmc->id.device_id; | |
2413 | int warn_printed = 0; | |
2414 | ||
2415 | snprintf(name, sizeof(name), | |
2416 | "ipmi_bmc.%4.4x", bmc->id.product_id); | |
2417 | ||
fe2d5ffc | 2418 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
f0b55da0 | 2419 | bmc->id.product_id, |
1d5636cc | 2420 | bmc->id.device_id)) { |
f0b55da0 CM |
2421 | if (!warn_printed) { |
2422 | printk(KERN_WARNING PFX | |
2423 | "This machine has two different BMCs" | |
2424 | " with the same product id and device" | |
2425 | " id. This is an error in the" | |
2426 | " firmware, but incrementing the" | |
2427 | " device id to work around the problem." | |
2428 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2429 | bmc->id.product_id, bmc->id.device_id); | |
2430 | warn_printed = 1; | |
2431 | } | |
2432 | bmc->id.device_id++; /* Wraps at 255 */ | |
2433 | if (bmc->id.device_id == orig_dev_id) { | |
2434 | printk(KERN_ERR PFX | |
2435 | "Out of device ids!\n"); | |
2436 | break; | |
2437 | } | |
2438 | } | |
2439 | ||
2440 | bmc->dev = platform_device_alloc(name, bmc->id.device_id); | |
8a3628d5 | 2441 | if (!bmc->dev) { |
f0b55da0 | 2442 | mutex_unlock(&ipmidriver_mutex); |
50c812b2 CM |
2443 | printk(KERN_ERR |
2444 | "ipmi_msghandler:" | |
2445 | " Unable to allocate platform device\n"); | |
2446 | return -ENOMEM; | |
2447 | } | |
fe2d5ffc | 2448 | bmc->dev->dev.driver = &ipmidriver.driver; |
50c812b2 CM |
2449 | dev_set_drvdata(&bmc->dev->dev, bmc); |
2450 | kref_init(&bmc->refcount); | |
2451 | ||
b48f5457 | 2452 | rv = platform_device_add(bmc->dev); |
50c812b2 CM |
2453 | mutex_unlock(&ipmidriver_mutex); |
2454 | if (rv) { | |
f0b55da0 CM |
2455 | platform_device_put(bmc->dev); |
2456 | bmc->dev = NULL; | |
50c812b2 CM |
2457 | printk(KERN_ERR |
2458 | "ipmi_msghandler:" | |
2459 | " Unable to register bmc device: %d\n", | |
2460 | rv); | |
c70d7499 CM |
2461 | /* |
2462 | * Don't go to out_err, you can only do that if | |
2463 | * the device is registered already. | |
2464 | */ | |
50c812b2 CM |
2465 | return rv; |
2466 | } | |
2467 | ||
5e59393e JG |
2468 | rv = create_files(bmc); |
2469 | if (rv) { | |
2470 | mutex_lock(&ipmidriver_mutex); | |
2471 | platform_device_unregister(bmc->dev); | |
2472 | mutex_unlock(&ipmidriver_mutex); | |
2473 | ||
2474 | return rv; | |
2475 | } | |
50c812b2 CM |
2476 | |
2477 | printk(KERN_INFO | |
2478 | "ipmi: Found new BMC (man_id: 0x%6.6x, " | |
2479 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2480 | bmc->id.manufacturer_id, | |
2481 | bmc->id.product_id, | |
2482 | bmc->id.device_id); | |
2483 | } | |
2484 | ||
2485 | /* | |
2486 | * create symlink from system interface device to bmc device | |
2487 | * and back. | |
2488 | */ | |
759643b8 CM |
2489 | intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL); |
2490 | if (!intf->sysfs_name) { | |
2491 | rv = -ENOMEM; | |
2492 | printk(KERN_ERR | |
2493 | "ipmi_msghandler: allocate link to BMC: %d\n", | |
2494 | rv); | |
2495 | goto out_err; | |
2496 | } | |
2497 | ||
50c812b2 | 2498 | rv = sysfs_create_link(&intf->si_dev->kobj, |
759643b8 | 2499 | &bmc->dev->dev.kobj, intf->sysfs_name); |
50c812b2 | 2500 | if (rv) { |
759643b8 CM |
2501 | kfree(intf->sysfs_name); |
2502 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2503 | printk(KERN_ERR |
2504 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2505 | rv); | |
2506 | goto out_err; | |
2507 | } | |
2508 | ||
759643b8 | 2509 | size = snprintf(dummy, 0, "ipmi%d", ifnum); |
50c812b2 CM |
2510 | intf->my_dev_name = kmalloc(size+1, GFP_KERNEL); |
2511 | if (!intf->my_dev_name) { | |
759643b8 CM |
2512 | kfree(intf->sysfs_name); |
2513 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2514 | rv = -ENOMEM; |
2515 | printk(KERN_ERR | |
2516 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2517 | rv); | |
2518 | goto out_err; | |
2519 | } | |
759643b8 | 2520 | snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum); |
50c812b2 CM |
2521 | |
2522 | rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj, | |
2523 | intf->my_dev_name); | |
2524 | if (rv) { | |
759643b8 CM |
2525 | kfree(intf->sysfs_name); |
2526 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2527 | kfree(intf->my_dev_name); |
2528 | intf->my_dev_name = NULL; | |
2529 | printk(KERN_ERR | |
2530 | "ipmi_msghandler:" | |
2531 | " Unable to create symlink to bmc: %d\n", | |
2532 | rv); | |
2533 | goto out_err; | |
2534 | } | |
2535 | ||
2536 | return 0; | |
2537 | ||
2538 | out_err: | |
2539 | ipmi_bmc_unregister(intf); | |
2540 | return rv; | |
2541 | } | |
2542 | ||
2543 | static int | |
2544 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2545 | { | |
2546 | struct kernel_ipmi_msg msg; | |
2547 | struct ipmi_system_interface_addr si; | |
2548 | ||
2549 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2550 | si.channel = IPMI_BMC_CHANNEL; | |
2551 | si.lun = 0; | |
2552 | ||
2553 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2554 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2555 | msg.data = NULL; | |
2556 | msg.data_len = 0; | |
2557 | return i_ipmi_request(NULL, | |
2558 | intf, | |
2559 | (struct ipmi_addr *) &si, | |
2560 | 0, | |
2561 | &msg, | |
2562 | intf, | |
2563 | NULL, | |
2564 | NULL, | |
2565 | 0, | |
2566 | intf->channels[0].address, | |
2567 | intf->channels[0].lun, | |
2568 | -1, 0); | |
2569 | } | |
2570 | ||
2571 | static void | |
2572 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2573 | { | |
2574 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2575 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2576 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2577 | /* Not for me */ | |
2578 | return; | |
2579 | ||
2580 | if (msg->msg.data[0] != 0) { | |
2581 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2582 | intf->bmc->guid_set = 0; | |
2583 | goto out; | |
2584 | } | |
2585 | ||
2586 | if (msg->msg.data_len < 17) { | |
2587 | intf->bmc->guid_set = 0; | |
2588 | printk(KERN_WARNING PFX | |
2589 | "guid_handler: The GUID response from the BMC was too" | |
2590 | " short, it was %d but should have been 17. Assuming" | |
2591 | " GUID is not available.\n", | |
2592 | msg->msg.data_len); | |
2593 | goto out; | |
2594 | } | |
2595 | ||
2596 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2597 | intf->bmc->guid_set = 1; | |
2598 | out: | |
2599 | wake_up(&intf->waitq); | |
2600 | } | |
2601 | ||
2602 | static void | |
2603 | get_guid(ipmi_smi_t intf) | |
2604 | { | |
2605 | int rv; | |
2606 | ||
2607 | intf->bmc->guid_set = 0x2; | |
2608 | intf->null_user_handler = guid_handler; | |
2609 | rv = send_guid_cmd(intf, 0); | |
2610 | if (rv) | |
2611 | /* Send failed, no GUID available. */ | |
2612 | intf->bmc->guid_set = 0; | |
2613 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2614 | intf->null_user_handler = NULL; | |
2615 | } | |
2616 | ||
1da177e4 LT |
2617 | static int |
2618 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2619 | { | |
2620 | struct kernel_ipmi_msg msg; | |
2621 | unsigned char data[1]; | |
2622 | struct ipmi_system_interface_addr si; | |
2623 | ||
2624 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2625 | si.channel = IPMI_BMC_CHANNEL; | |
2626 | si.lun = 0; | |
2627 | ||
2628 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2629 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2630 | msg.data = data; | |
2631 | msg.data_len = 1; | |
2632 | data[0] = chan; | |
2633 | return i_ipmi_request(NULL, | |
2634 | intf, | |
2635 | (struct ipmi_addr *) &si, | |
2636 | 0, | |
2637 | &msg, | |
56a55ec6 | 2638 | intf, |
1da177e4 LT |
2639 | NULL, |
2640 | NULL, | |
2641 | 0, | |
c14979b9 CM |
2642 | intf->channels[0].address, |
2643 | intf->channels[0].lun, | |
1da177e4 LT |
2644 | -1, 0); |
2645 | } | |
2646 | ||
2647 | static void | |
56a55ec6 | 2648 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2649 | { |
2650 | int rv = 0; | |
2651 | int chan; | |
2652 | ||
56a55ec6 CM |
2653 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2654 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2655 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2656 | /* It's the one we want */ |
56a55ec6 | 2657 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2658 | /* Got an error from the channel, just go on. */ |
2659 | ||
56a55ec6 | 2660 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2661 | /* |
2662 | * If the MC does not support this | |
2663 | * command, that is legal. We just | |
2664 | * assume it has one IPMB at channel | |
2665 | * zero. | |
2666 | */ | |
1da177e4 LT |
2667 | intf->channels[0].medium |
2668 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2669 | intf->channels[0].protocol | |
2670 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
2671 | rv = -ENOSYS; | |
2672 | ||
2673 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2674 | wake_up(&intf->waitq); | |
2675 | goto out; | |
2676 | } | |
2677 | goto next_channel; | |
2678 | } | |
56a55ec6 | 2679 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2680 | /* Message not big enough, just go on. */ |
2681 | goto next_channel; | |
2682 | } | |
2683 | chan = intf->curr_channel; | |
56a55ec6 CM |
2684 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2685 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2686 | |
c70d7499 | 2687 | next_channel: |
1da177e4 LT |
2688 | intf->curr_channel++; |
2689 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2690 | wake_up(&intf->waitq); | |
2691 | else | |
2692 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2693 | ||
2694 | if (rv) { | |
2695 | /* Got an error somehow, just give up. */ | |
2696 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2697 | wake_up(&intf->waitq); | |
2698 | ||
2699 | printk(KERN_WARNING PFX | |
2700 | "Error sending channel information: %d\n", | |
2701 | rv); | |
2702 | } | |
2703 | } | |
2704 | out: | |
2705 | return; | |
2706 | } | |
2707 | ||
fcfa4724 CM |
2708 | void ipmi_poll_interface(ipmi_user_t user) |
2709 | { | |
2710 | ipmi_smi_t intf = user->intf; | |
2711 | ||
2712 | if (intf->handlers->poll) | |
2713 | intf->handlers->poll(intf->send_info); | |
2714 | } | |
c70d7499 | 2715 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2716 | |
1da177e4 LT |
2717 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, |
2718 | void *send_info, | |
50c812b2 CM |
2719 | struct ipmi_device_id *device_id, |
2720 | struct device *si_dev, | |
759643b8 | 2721 | const char *sysfs_name, |
453823ba | 2722 | unsigned char slave_addr) |
1da177e4 LT |
2723 | { |
2724 | int i, j; | |
2725 | int rv; | |
393d2cc3 | 2726 | ipmi_smi_t intf; |
bca0324d | 2727 | ipmi_smi_t tintf; |
bca0324d | 2728 | struct list_head *link; |
1da177e4 | 2729 | |
c70d7499 CM |
2730 | /* |
2731 | * Make sure the driver is actually initialized, this handles | |
2732 | * problems with initialization order. | |
2733 | */ | |
1da177e4 LT |
2734 | if (!initialized) { |
2735 | rv = ipmi_init_msghandler(); | |
2736 | if (rv) | |
2737 | return rv; | |
c70d7499 CM |
2738 | /* |
2739 | * The init code doesn't return an error if it was turned | |
2740 | * off, but it won't initialize. Check that. | |
2741 | */ | |
1da177e4 LT |
2742 | if (!initialized) |
2743 | return -ENODEV; | |
2744 | } | |
2745 | ||
dd00cc48 | 2746 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2747 | if (!intf) |
1da177e4 | 2748 | return -ENOMEM; |
b2c03941 CM |
2749 | |
2750 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2751 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2752 | ||
50c812b2 CM |
2753 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2754 | if (!intf->bmc) { | |
2755 | kfree(intf); | |
2756 | return -ENOMEM; | |
2757 | } | |
bca0324d | 2758 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2759 | kref_init(&intf->refcount); |
50c812b2 CM |
2760 | intf->bmc->id = *device_id; |
2761 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2762 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2763 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2764 | intf->channels[j].lun = 2; | |
2765 | } | |
2766 | if (slave_addr != 0) | |
2767 | intf->channels[0].address = slave_addr; | |
2768 | INIT_LIST_HEAD(&intf->users); | |
2769 | intf->handlers = handlers; | |
2770 | intf->send_info = send_info; | |
2771 | spin_lock_init(&intf->seq_lock); | |
2772 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2773 | intf->seq_table[j].inuse = 0; | |
2774 | intf->seq_table[j].seqid = 0; | |
2775 | } | |
2776 | intf->curr_seq = 0; | |
2777 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2778 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 CM |
2779 | #endif |
2780 | spin_lock_init(&intf->waiting_msgs_lock); | |
2781 | INIT_LIST_HEAD(&intf->waiting_msgs); | |
2782 | spin_lock_init(&intf->events_lock); | |
2783 | INIT_LIST_HEAD(&intf->waiting_events); | |
2784 | intf->waiting_events_count = 0; | |
d6dfd131 | 2785 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2786 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2787 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2788 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2789 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2790 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2791 | |
393d2cc3 | 2792 | intf->proc_dir = NULL; |
1da177e4 | 2793 | |
b2c03941 | 2794 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2795 | mutex_lock(&ipmi_interfaces_mutex); |
2796 | /* Look for a hole in the numbers. */ | |
2797 | i = 0; | |
2798 | link = &ipmi_interfaces; | |
2799 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2800 | if (tintf->intf_num != i) { | |
2801 | link = &tintf->link; | |
1da177e4 LT |
2802 | break; |
2803 | } | |
bca0324d | 2804 | i++; |
1da177e4 | 2805 | } |
bca0324d CM |
2806 | /* Add the new interface in numeric order. */ |
2807 | if (i == 0) | |
2808 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2809 | else | |
2810 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2811 | |
453823ba CM |
2812 | rv = handlers->start_processing(send_info, intf); |
2813 | if (rv) | |
2814 | goto out; | |
1da177e4 | 2815 | |
50c812b2 CM |
2816 | get_guid(intf); |
2817 | ||
b2c03941 | 2818 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2819 | || ((intf->ipmi_version_major == 1) |
2820 | && (intf->ipmi_version_minor >= 5))) { | |
2821 | /* | |
2822 | * Start scanning the channels to see what is | |
2823 | * available. | |
2824 | */ | |
393d2cc3 CM |
2825 | intf->null_user_handler = channel_handler; |
2826 | intf->curr_channel = 0; | |
2827 | rv = send_channel_info_cmd(intf, 0); | |
2828 | if (rv) | |
2829 | goto out; | |
1da177e4 | 2830 | |
393d2cc3 CM |
2831 | /* Wait for the channel info to be read. */ |
2832 | wait_event(intf->waitq, | |
2833 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2834 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2835 | } else { |
2836 | /* Assume a single IPMB channel at zero. */ | |
2837 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2838 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2839 | } |
2840 | ||
393d2cc3 CM |
2841 | if (rv == 0) |
2842 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2843 | |
759643b8 | 2844 | rv = ipmi_bmc_register(intf, i, sysfs_name); |
50c812b2 | 2845 | |
393d2cc3 | 2846 | out: |
1da177e4 | 2847 | if (rv) { |
393d2cc3 CM |
2848 | if (intf->proc_dir) |
2849 | remove_proc_entries(intf); | |
b2c03941 | 2850 | intf->handlers = NULL; |
bca0324d CM |
2851 | list_del_rcu(&intf->link); |
2852 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2853 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2854 | synchronize_rcu(); |
393d2cc3 | 2855 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2856 | } else { |
78ba2faf CM |
2857 | /* |
2858 | * Keep memory order straight for RCU readers. Make | |
2859 | * sure everything else is committed to memory before | |
2860 | * setting intf_num to mark the interface valid. | |
2861 | */ | |
2862 | smp_wmb(); | |
bca0324d CM |
2863 | intf->intf_num = i; |
2864 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 2865 | /* After this point the interface is legal to use. */ |
50c812b2 | 2866 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 2867 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
2868 | } |
2869 | ||
2870 | return rv; | |
2871 | } | |
c70d7499 | 2872 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 2873 | |
b2c03941 CM |
2874 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
2875 | { | |
2876 | int i; | |
2877 | struct seq_table *ent; | |
2878 | ||
2879 | /* No need for locks, the interface is down. */ | |
2880 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
2881 | ent = &(intf->seq_table[i]); | |
2882 | if (!ent->inuse) | |
2883 | continue; | |
2884 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
2885 | } | |
2886 | } | |
2887 | ||
1da177e4 LT |
2888 | int ipmi_unregister_smi(ipmi_smi_t intf) |
2889 | { | |
1da177e4 | 2890 | struct ipmi_smi_watcher *w; |
b2c03941 | 2891 | int intf_num = intf->intf_num; |
1da177e4 | 2892 | |
50c812b2 CM |
2893 | ipmi_bmc_unregister(intf); |
2894 | ||
b2c03941 | 2895 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 2896 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 CM |
2897 | intf->intf_num = -1; |
2898 | intf->handlers = NULL; | |
bca0324d CM |
2899 | list_del_rcu(&intf->link); |
2900 | mutex_unlock(&ipmi_interfaces_mutex); | |
2901 | synchronize_rcu(); | |
1da177e4 | 2902 | |
b2c03941 CM |
2903 | cleanup_smi_msgs(intf); |
2904 | ||
393d2cc3 | 2905 | remove_proc_entries(intf); |
1da177e4 | 2906 | |
c70d7499 CM |
2907 | /* |
2908 | * Call all the watcher interfaces to tell them that | |
2909 | * an interface is gone. | |
2910 | */ | |
393d2cc3 | 2911 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
2912 | w->smi_gone(intf_num); |
2913 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 2914 | |
393d2cc3 | 2915 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
2916 | return 0; |
2917 | } | |
c70d7499 | 2918 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
2919 | |
2920 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
2921 | struct ipmi_smi_msg *msg) | |
2922 | { | |
2923 | struct ipmi_ipmb_addr ipmb_addr; | |
2924 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 2925 | |
c70d7499 CM |
2926 | /* |
2927 | * This is 11, not 10, because the response must contain a | |
2928 | * completion code. | |
2929 | */ | |
1da177e4 LT |
2930 | if (msg->rsp_size < 11) { |
2931 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 2932 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
2933 | return 0; |
2934 | } | |
2935 | ||
2936 | if (msg->rsp[2] != 0) { | |
2937 | /* An error getting the response, just ignore it. */ | |
2938 | return 0; | |
2939 | } | |
2940 | ||
2941 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
2942 | ipmb_addr.slave_addr = msg->rsp[6]; | |
2943 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
2944 | ipmb_addr.lun = msg->rsp[7] & 3; | |
2945 | ||
c70d7499 CM |
2946 | /* |
2947 | * It's a response from a remote entity. Look up the sequence | |
2948 | * number and handle the response. | |
2949 | */ | |
1da177e4 LT |
2950 | if (intf_find_seq(intf, |
2951 | msg->rsp[7] >> 2, | |
2952 | msg->rsp[3] & 0x0f, | |
2953 | msg->rsp[8], | |
2954 | (msg->rsp[4] >> 2) & (~1), | |
2955 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
2956 | &recv_msg)) { |
2957 | /* | |
2958 | * We were unable to find the sequence number, | |
2959 | * so just nuke the message. | |
2960 | */ | |
b2655f26 | 2961 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
2962 | return 0; |
2963 | } | |
2964 | ||
2965 | memcpy(recv_msg->msg_data, | |
2966 | &(msg->rsp[9]), | |
2967 | msg->rsp_size - 9); | |
c70d7499 CM |
2968 | /* |
2969 | * The other fields matched, so no need to set them, except | |
2970 | * for netfn, which needs to be the response that was | |
2971 | * returned, not the request value. | |
2972 | */ | |
1da177e4 LT |
2973 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
2974 | recv_msg->msg.data = recv_msg->msg_data; | |
2975 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
2976 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 2977 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
2978 | deliver_response(recv_msg); |
2979 | ||
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
2984 | struct ipmi_smi_msg *msg) | |
2985 | { | |
393d2cc3 CM |
2986 | struct cmd_rcvr *rcvr; |
2987 | int rv = 0; | |
2988 | unsigned char netfn; | |
2989 | unsigned char cmd; | |
c69c3127 | 2990 | unsigned char chan; |
393d2cc3 CM |
2991 | ipmi_user_t user = NULL; |
2992 | struct ipmi_ipmb_addr *ipmb_addr; | |
2993 | struct ipmi_recv_msg *recv_msg; | |
b2c03941 | 2994 | struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
2995 | |
2996 | if (msg->rsp_size < 10) { | |
2997 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 2998 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
2999 | return 0; |
3000 | } | |
3001 | ||
3002 | if (msg->rsp[2] != 0) { | |
3003 | /* An error getting the response, just ignore it. */ | |
3004 | return 0; | |
3005 | } | |
3006 | ||
3007 | netfn = msg->rsp[4] >> 2; | |
3008 | cmd = msg->rsp[8]; | |
c69c3127 | 3009 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3010 | |
e61fb5b6 | 3011 | rcu_read_lock(); |
c69c3127 | 3012 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3013 | if (rcvr) { |
3014 | user = rcvr->user; | |
3015 | kref_get(&user->refcount); | |
3016 | } else | |
3017 | user = NULL; | |
e61fb5b6 | 3018 | rcu_read_unlock(); |
1da177e4 LT |
3019 | |
3020 | if (user == NULL) { | |
3021 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3022 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3023 | |
3024 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3025 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3026 | msg->data[2] = msg->rsp[3]; | |
3027 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3028 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3029 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3030 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3031 | /* rqseq/lun */ |
3032 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3033 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3034 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3035 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3036 | msg->data_size = 11; | |
3037 | ||
3038 | #ifdef DEBUG_MSGING | |
3039 | { | |
3040 | int m; | |
3041 | printk("Invalid command:"); | |
e8b33617 | 3042 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3043 | printk(" %2.2x", msg->data[m]); |
3044 | printk("\n"); | |
3045 | } | |
3046 | #endif | |
b2c03941 CM |
3047 | rcu_read_lock(); |
3048 | handlers = intf->handlers; | |
3049 | if (handlers) { | |
3050 | handlers->sender(intf->send_info, msg, 0); | |
c70d7499 CM |
3051 | /* |
3052 | * We used the message, so return the value | |
3053 | * that causes it to not be freed or | |
3054 | * queued. | |
3055 | */ | |
b2c03941 CM |
3056 | rv = -1; |
3057 | } | |
3058 | rcu_read_unlock(); | |
1da177e4 LT |
3059 | } else { |
3060 | /* Deliver the message to the user. */ | |
b2655f26 | 3061 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3062 | |
3063 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3064 | if (!recv_msg) { |
c70d7499 CM |
3065 | /* |
3066 | * We couldn't allocate memory for the | |
3067 | * message, so requeue it for handling | |
3068 | * later. | |
3069 | */ | |
1da177e4 | 3070 | rv = 1; |
393d2cc3 | 3071 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3072 | } else { |
3073 | /* Extract the source address from the data. */ | |
3074 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3075 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3076 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3077 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3078 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3079 | ||
c70d7499 CM |
3080 | /* |
3081 | * Extract the rest of the message information | |
3082 | * from the IPMB header. | |
3083 | */ | |
1da177e4 LT |
3084 | recv_msg->user = user; |
3085 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3086 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3087 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3088 | recv_msg->msg.cmd = msg->rsp[8]; | |
3089 | recv_msg->msg.data = recv_msg->msg_data; | |
3090 | ||
c70d7499 CM |
3091 | /* |
3092 | * We chop off 10, not 9 bytes because the checksum | |
3093 | * at the end also needs to be removed. | |
3094 | */ | |
1da177e4 LT |
3095 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3096 | memcpy(recv_msg->msg_data, | |
3097 | &(msg->rsp[9]), | |
3098 | msg->rsp_size - 10); | |
3099 | deliver_response(recv_msg); | |
3100 | } | |
3101 | } | |
3102 | ||
3103 | return rv; | |
3104 | } | |
3105 | ||
3106 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3107 | struct ipmi_smi_msg *msg) | |
3108 | { | |
3109 | struct ipmi_lan_addr lan_addr; | |
3110 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3111 | |
3112 | ||
c70d7499 CM |
3113 | /* |
3114 | * This is 13, not 12, because the response must contain a | |
3115 | * completion code. | |
3116 | */ | |
1da177e4 LT |
3117 | if (msg->rsp_size < 13) { |
3118 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3119 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3120 | return 0; |
3121 | } | |
3122 | ||
3123 | if (msg->rsp[2] != 0) { | |
3124 | /* An error getting the response, just ignore it. */ | |
3125 | return 0; | |
3126 | } | |
3127 | ||
3128 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3129 | lan_addr.session_handle = msg->rsp[4]; | |
3130 | lan_addr.remote_SWID = msg->rsp[8]; | |
3131 | lan_addr.local_SWID = msg->rsp[5]; | |
3132 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3133 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3134 | lan_addr.lun = msg->rsp[9] & 3; | |
3135 | ||
c70d7499 CM |
3136 | /* |
3137 | * It's a response from a remote entity. Look up the sequence | |
3138 | * number and handle the response. | |
3139 | */ | |
1da177e4 LT |
3140 | if (intf_find_seq(intf, |
3141 | msg->rsp[9] >> 2, | |
3142 | msg->rsp[3] & 0x0f, | |
3143 | msg->rsp[10], | |
3144 | (msg->rsp[6] >> 2) & (~1), | |
3145 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3146 | &recv_msg)) { |
3147 | /* | |
3148 | * We were unable to find the sequence number, | |
3149 | * so just nuke the message. | |
3150 | */ | |
b2655f26 | 3151 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3152 | return 0; |
3153 | } | |
3154 | ||
3155 | memcpy(recv_msg->msg_data, | |
3156 | &(msg->rsp[11]), | |
3157 | msg->rsp_size - 11); | |
c70d7499 CM |
3158 | /* |
3159 | * The other fields matched, so no need to set them, except | |
3160 | * for netfn, which needs to be the response that was | |
3161 | * returned, not the request value. | |
3162 | */ | |
1da177e4 LT |
3163 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3164 | recv_msg->msg.data = recv_msg->msg_data; | |
3165 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3166 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3167 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3168 | deliver_response(recv_msg); |
3169 | ||
3170 | return 0; | |
3171 | } | |
3172 | ||
3173 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3174 | struct ipmi_smi_msg *msg) | |
3175 | { | |
393d2cc3 CM |
3176 | struct cmd_rcvr *rcvr; |
3177 | int rv = 0; | |
3178 | unsigned char netfn; | |
3179 | unsigned char cmd; | |
c69c3127 | 3180 | unsigned char chan; |
393d2cc3 CM |
3181 | ipmi_user_t user = NULL; |
3182 | struct ipmi_lan_addr *lan_addr; | |
3183 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3184 | |
3185 | if (msg->rsp_size < 12) { | |
3186 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3187 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3188 | return 0; |
3189 | } | |
3190 | ||
3191 | if (msg->rsp[2] != 0) { | |
3192 | /* An error getting the response, just ignore it. */ | |
3193 | return 0; | |
3194 | } | |
3195 | ||
3196 | netfn = msg->rsp[6] >> 2; | |
3197 | cmd = msg->rsp[10]; | |
c69c3127 | 3198 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3199 | |
e61fb5b6 | 3200 | rcu_read_lock(); |
c69c3127 | 3201 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3202 | if (rcvr) { |
3203 | user = rcvr->user; | |
3204 | kref_get(&user->refcount); | |
3205 | } else | |
3206 | user = NULL; | |
e61fb5b6 | 3207 | rcu_read_unlock(); |
1da177e4 LT |
3208 | |
3209 | if (user == NULL) { | |
393d2cc3 | 3210 | /* We didn't find a user, just give up. */ |
b2655f26 | 3211 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3212 | |
c70d7499 CM |
3213 | /* |
3214 | * Don't do anything with these messages, just allow | |
3215 | * them to be freed. | |
3216 | */ | |
3217 | rv = 0; | |
1da177e4 LT |
3218 | } else { |
3219 | /* Deliver the message to the user. */ | |
b2655f26 | 3220 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3221 | |
3222 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3223 | if (!recv_msg) { |
c70d7499 CM |
3224 | /* |
3225 | * We couldn't allocate memory for the | |
3226 | * message, so requeue it for handling later. | |
3227 | */ | |
1da177e4 | 3228 | rv = 1; |
393d2cc3 | 3229 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3230 | } else { |
3231 | /* Extract the source address from the data. */ | |
3232 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3233 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3234 | lan_addr->session_handle = msg->rsp[4]; | |
3235 | lan_addr->remote_SWID = msg->rsp[8]; | |
3236 | lan_addr->local_SWID = msg->rsp[5]; | |
3237 | lan_addr->lun = msg->rsp[9] & 3; | |
3238 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3239 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3240 | ||
c70d7499 CM |
3241 | /* |
3242 | * Extract the rest of the message information | |
3243 | * from the IPMB header. | |
3244 | */ | |
1da177e4 LT |
3245 | recv_msg->user = user; |
3246 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3247 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3248 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3249 | recv_msg->msg.cmd = msg->rsp[10]; | |
3250 | recv_msg->msg.data = recv_msg->msg_data; | |
3251 | ||
c70d7499 CM |
3252 | /* |
3253 | * We chop off 12, not 11 bytes because the checksum | |
3254 | * at the end also needs to be removed. | |
3255 | */ | |
1da177e4 LT |
3256 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3257 | memcpy(recv_msg->msg_data, | |
3258 | &(msg->rsp[11]), | |
3259 | msg->rsp_size - 12); | |
3260 | deliver_response(recv_msg); | |
3261 | } | |
3262 | } | |
3263 | ||
3264 | return rv; | |
3265 | } | |
3266 | ||
3267 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, | |
3268 | struct ipmi_smi_msg *msg) | |
3269 | { | |
3270 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3271 | |
1da177e4 LT |
3272 | recv_msg->msgid = 0; |
3273 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3274 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3275 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3276 | smi_addr->lun = msg->rsp[0] & 3; | |
3277 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3278 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3279 | recv_msg->msg.cmd = msg->rsp[1]; | |
3280 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3281 | recv_msg->msg.data = recv_msg->msg_data; | |
3282 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3283 | } | |
3284 | ||
1da177e4 LT |
3285 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3286 | struct ipmi_smi_msg *msg) | |
3287 | { | |
3288 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3289 | struct list_head msgs; | |
3290 | ipmi_user_t user; | |
3291 | int rv = 0; | |
3292 | int deliver_count = 0; | |
3293 | unsigned long flags; | |
3294 | ||
3295 | if (msg->rsp_size < 19) { | |
3296 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3297 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3298 | return 0; |
3299 | } | |
3300 | ||
3301 | if (msg->rsp[2] != 0) { | |
3302 | /* An error getting the event, just ignore it. */ | |
3303 | return 0; | |
3304 | } | |
3305 | ||
3306 | INIT_LIST_HEAD(&msgs); | |
3307 | ||
393d2cc3 | 3308 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3309 | |
b2655f26 | 3310 | ipmi_inc_stat(intf, events); |
1da177e4 | 3311 | |
c70d7499 CM |
3312 | /* |
3313 | * Allocate and fill in one message for every user that is | |
3314 | * getting events. | |
3315 | */ | |
393d2cc3 CM |
3316 | rcu_read_lock(); |
3317 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3318 | if (!user->gets_events) |
1da177e4 LT |
3319 | continue; |
3320 | ||
3321 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3322 | if (!recv_msg) { |
393d2cc3 | 3323 | rcu_read_unlock(); |
8a3628d5 CM |
3324 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3325 | link) { | |
1da177e4 LT |
3326 | list_del(&recv_msg->link); |
3327 | ipmi_free_recv_msg(recv_msg); | |
3328 | } | |
c70d7499 CM |
3329 | /* |
3330 | * We couldn't allocate memory for the | |
3331 | * message, so requeue it for handling | |
3332 | * later. | |
3333 | */ | |
1da177e4 LT |
3334 | rv = 1; |
3335 | goto out; | |
3336 | } | |
3337 | ||
3338 | deliver_count++; | |
3339 | ||
3340 | copy_event_into_recv_msg(recv_msg, msg); | |
3341 | recv_msg->user = user; | |
393d2cc3 | 3342 | kref_get(&user->refcount); |
1da177e4 LT |
3343 | list_add_tail(&(recv_msg->link), &msgs); |
3344 | } | |
393d2cc3 | 3345 | rcu_read_unlock(); |
1da177e4 LT |
3346 | |
3347 | if (deliver_count) { | |
3348 | /* Now deliver all the messages. */ | |
3349 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3350 | list_del(&recv_msg->link); | |
3351 | deliver_response(recv_msg); | |
3352 | } | |
3353 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3354 | /* |
3355 | * No one to receive the message, put it in queue if there's | |
3356 | * not already too many things in the queue. | |
3357 | */ | |
1da177e4 | 3358 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3359 | if (!recv_msg) { |
c70d7499 CM |
3360 | /* |
3361 | * We couldn't allocate memory for the | |
3362 | * message, so requeue it for handling | |
3363 | * later. | |
3364 | */ | |
1da177e4 LT |
3365 | rv = 1; |
3366 | goto out; | |
3367 | } | |
3368 | ||
3369 | copy_event_into_recv_msg(recv_msg, msg); | |
3370 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3371 | intf->waiting_events_count++; |
87ebd06f | 3372 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3373 | /* |
3374 | * There's too many things in the queue, discard this | |
3375 | * message. | |
3376 | */ | |
87ebd06f CM |
3377 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3378 | " incoming events\n"); | |
3379 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3380 | } |
3381 | ||
3382 | out: | |
3383 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3384 | ||
3385 | return rv; | |
3386 | } | |
3387 | ||
3388 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3389 | struct ipmi_smi_msg *msg) | |
3390 | { | |
3391 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3392 | struct ipmi_user *user; |
1da177e4 LT |
3393 | |
3394 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3395 | if (recv_msg == NULL) { |
3396 | printk(KERN_WARNING | |
3397 | "IPMI message received with no owner. This\n" | |
3398 | "could be because of a malformed message, or\n" | |
3399 | "because of a hardware error. Contact your\n" | |
3400 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3401 | return 0; |
3402 | } | |
1da177e4 | 3403 | |
393d2cc3 | 3404 | user = recv_msg->user; |
1da177e4 | 3405 | /* Make sure the user still exists. */ |
393d2cc3 | 3406 | if (user && !user->valid) { |
56a55ec6 | 3407 | /* The user for the message went away, so give up. */ |
b2655f26 | 3408 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3409 | ipmi_free_recv_msg(recv_msg); |
3410 | } else { | |
3411 | struct ipmi_system_interface_addr *smi_addr; | |
3412 | ||
b2655f26 | 3413 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3414 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3415 | recv_msg->msgid = msg->msgid; | |
3416 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3417 | &(recv_msg->addr)); | |
3418 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3419 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3420 | smi_addr->lun = msg->rsp[0] & 3; | |
3421 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3422 | recv_msg->msg.cmd = msg->rsp[1]; | |
3423 | memcpy(recv_msg->msg_data, | |
3424 | &(msg->rsp[2]), | |
3425 | msg->rsp_size - 2); | |
3426 | recv_msg->msg.data = recv_msg->msg_data; | |
3427 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3428 | deliver_response(recv_msg); | |
3429 | } | |
3430 | ||
3431 | return 0; | |
3432 | } | |
3433 | ||
c70d7499 CM |
3434 | /* |
3435 | * Handle a new message. Return 1 if the message should be requeued, | |
3436 | * 0 if the message should be freed, or -1 if the message should not | |
3437 | * be freed or requeued. | |
3438 | */ | |
1da177e4 LT |
3439 | static int handle_new_recv_msg(ipmi_smi_t intf, |
3440 | struct ipmi_smi_msg *msg) | |
3441 | { | |
3442 | int requeue; | |
3443 | int chan; | |
3444 | ||
3445 | #ifdef DEBUG_MSGING | |
3446 | int m; | |
3447 | printk("Recv:"); | |
e8b33617 | 3448 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3449 | printk(" %2.2x", msg->rsp[m]); |
3450 | printk("\n"); | |
3451 | #endif | |
3452 | if (msg->rsp_size < 2) { | |
3453 | /* Message is too small to be correct. */ | |
3454 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3455 | " for netfn %x cmd %x, got %d bytes\n", | |
3456 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3457 | ||
3458 | /* Generate an error response for the message. */ | |
3459 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3460 | msg->rsp[1] = msg->data[1]; | |
3461 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3462 | msg->rsp_size = 3; | |
c70d7499 CM |
3463 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3464 | || (msg->rsp[1] != msg->data[1])) { | |
3465 | /* | |
3466 | * The NetFN and Command in the response is not even | |
3467 | * marginally correct. | |
3468 | */ | |
1da177e4 LT |
3469 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3470 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3471 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3472 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3473 | ||
3474 | /* Generate an error response for the message. */ | |
3475 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3476 | msg->rsp[1] = msg->data[1]; | |
3477 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3478 | msg->rsp_size = 3; | |
3479 | } | |
3480 | ||
3481 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3482 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3483 | && (msg->user_data != NULL)) { |
3484 | /* | |
3485 | * It's a response to a response we sent. For this we | |
3486 | * deliver a send message response to the user. | |
3487 | */ | |
393d2cc3 | 3488 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3489 | |
3490 | requeue = 0; | |
3491 | if (msg->rsp_size < 2) | |
3492 | /* Message is too small to be correct. */ | |
3493 | goto out; | |
3494 | ||
3495 | chan = msg->data[2] & 0x0f; | |
3496 | if (chan >= IPMI_MAX_CHANNELS) | |
3497 | /* Invalid channel number */ | |
3498 | goto out; | |
3499 | ||
393d2cc3 CM |
3500 | if (!recv_msg) |
3501 | goto out; | |
3502 | ||
3503 | /* Make sure the user still exists. */ | |
3504 | if (!recv_msg->user || !recv_msg->user->valid) | |
3505 | goto out; | |
3506 | ||
3507 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3508 | recv_msg->msg.data = recv_msg->msg_data; | |
3509 | recv_msg->msg.data_len = 1; | |
3510 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3511 | deliver_response(recv_msg); | |
1da177e4 | 3512 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3513 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3514 | /* It's from the receive queue. */ |
3515 | chan = msg->rsp[3] & 0xf; | |
3516 | if (chan >= IPMI_MAX_CHANNELS) { | |
3517 | /* Invalid channel number */ | |
3518 | requeue = 0; | |
3519 | goto out; | |
3520 | } | |
3521 | ||
3522 | switch (intf->channels[chan].medium) { | |
3523 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3524 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3525 | /* |
3526 | * It's a response, so find the | |
3527 | * requesting message and send it up. | |
3528 | */ | |
1da177e4 LT |
3529 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3530 | } else { | |
c70d7499 CM |
3531 | /* |
3532 | * It's a command to the SMS from some other | |
3533 | * entity. Handle that. | |
3534 | */ | |
1da177e4 LT |
3535 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3536 | } | |
3537 | break; | |
3538 | ||
3539 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3540 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3541 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3542 | /* |
3543 | * It's a response, so find the | |
3544 | * requesting message and send it up. | |
3545 | */ | |
1da177e4 LT |
3546 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3547 | } else { | |
c70d7499 CM |
3548 | /* |
3549 | * It's a command to the SMS from some other | |
3550 | * entity. Handle that. | |
3551 | */ | |
1da177e4 LT |
3552 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3553 | } | |
3554 | break; | |
3555 | ||
3556 | default: | |
c70d7499 CM |
3557 | /* |
3558 | * We don't handle the channel type, so just | |
3559 | * free the message. | |
3560 | */ | |
1da177e4 LT |
3561 | requeue = 0; |
3562 | } | |
3563 | ||
3564 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3565 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
1da177e4 LT |
3566 | /* It's an asyncronous event. */ |
3567 | requeue = handle_read_event_rsp(intf, msg); | |
3568 | } else { | |
3569 | /* It's a response from the local BMC. */ | |
3570 | requeue = handle_bmc_rsp(intf, msg); | |
3571 | } | |
3572 | ||
3573 | out: | |
3574 | return requeue; | |
3575 | } | |
3576 | ||
3577 | /* Handle a new message from the lower layer. */ | |
3578 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3579 | struct ipmi_smi_msg *msg) | |
3580 | { | |
5956dce1 | 3581 | unsigned long flags = 0; /* keep us warning-free. */ |
1da177e4 | 3582 | int rv; |
5956dce1 | 3583 | int run_to_completion; |
1da177e4 LT |
3584 | |
3585 | ||
1da177e4 LT |
3586 | if ((msg->data_size >= 2) |
3587 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3588 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3589 | && (msg->user_data == NULL)) { |
3590 | /* | |
3591 | * This is the local response to a command send, start | |
3592 | * the timer for these. The user_data will not be | |
3593 | * NULL if this is a response send, and we will let | |
3594 | * response sends just go through. | |
3595 | */ | |
3596 | ||
3597 | /* | |
3598 | * Check for errors, if we get certain errors (ones | |
3599 | * that mean basically we can try again later), we | |
3600 | * ignore them and start the timer. Otherwise we | |
3601 | * report the error immediately. | |
3602 | */ | |
1da177e4 LT |
3603 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
3604 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
3605 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
3606 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 3607 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
3608 | int chan = msg->rsp[3] & 0xf; |
3609 | ||
3610 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
3611 | if (chan >= IPMI_MAX_CHANNELS) |
3612 | ; /* This shouldn't happen */ | |
3613 | else if ((intf->channels[chan].medium | |
3614 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3615 | || (intf->channels[chan].medium | |
3616 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 3617 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 3618 | else |
b2655f26 | 3619 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 3620 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 3621 | } else |
1da177e4 LT |
3622 | /* The message was sent, start the timer. */ |
3623 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 LT |
3624 | |
3625 | ipmi_free_smi_msg(msg); | |
393d2cc3 | 3626 | goto out; |
1da177e4 LT |
3627 | } |
3628 | ||
c70d7499 CM |
3629 | /* |
3630 | * To preserve message order, if the list is not empty, we | |
3631 | * tack this message onto the end of the list. | |
3632 | */ | |
5956dce1 KB |
3633 | run_to_completion = intf->run_to_completion; |
3634 | if (!run_to_completion) | |
3635 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
393d2cc3 CM |
3636 | if (!list_empty(&intf->waiting_msgs)) { |
3637 | list_add_tail(&msg->link, &intf->waiting_msgs); | |
5956dce1 KB |
3638 | if (!run_to_completion) |
3639 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
393d2cc3 | 3640 | goto out; |
1da177e4 | 3641 | } |
5956dce1 KB |
3642 | if (!run_to_completion) |
3643 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
c70d7499 | 3644 | |
1da177e4 LT |
3645 | rv = handle_new_recv_msg(intf, msg); |
3646 | if (rv > 0) { | |
c70d7499 CM |
3647 | /* |
3648 | * Could not handle the message now, just add it to a | |
3649 | * list to handle later. | |
3650 | */ | |
5956dce1 KB |
3651 | run_to_completion = intf->run_to_completion; |
3652 | if (!run_to_completion) | |
3653 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
393d2cc3 | 3654 | list_add_tail(&msg->link, &intf->waiting_msgs); |
5956dce1 KB |
3655 | if (!run_to_completion) |
3656 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
1da177e4 LT |
3657 | } else if (rv == 0) { |
3658 | ipmi_free_smi_msg(msg); | |
3659 | } | |
3660 | ||
393d2cc3 CM |
3661 | out: |
3662 | return; | |
1da177e4 | 3663 | } |
c70d7499 | 3664 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
3665 | |
3666 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3667 | { | |
3668 | ipmi_user_t user; | |
3669 | ||
393d2cc3 CM |
3670 | rcu_read_lock(); |
3671 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3672 | if (!user->handler->ipmi_watchdog_pretimeout) |
1da177e4 LT |
3673 | continue; |
3674 | ||
3675 | user->handler->ipmi_watchdog_pretimeout(user->handler_data); | |
3676 | } | |
393d2cc3 | 3677 | rcu_read_unlock(); |
1da177e4 | 3678 | } |
c70d7499 | 3679 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 3680 | |
882fe011 CM |
3681 | static struct ipmi_smi_msg * |
3682 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
3683 | unsigned char seq, long seqid) | |
1da177e4 | 3684 | { |
882fe011 | 3685 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 3686 | if (!smi_msg) |
c70d7499 CM |
3687 | /* |
3688 | * If we can't allocate the message, then just return, we | |
3689 | * get 4 retries, so this should be ok. | |
3690 | */ | |
882fe011 | 3691 | return NULL; |
1da177e4 LT |
3692 | |
3693 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
3694 | smi_msg->data_size = recv_msg->msg.data_len; | |
3695 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 3696 | |
1da177e4 LT |
3697 | #ifdef DEBUG_MSGING |
3698 | { | |
3699 | int m; | |
3700 | printk("Resend: "); | |
e8b33617 | 3701 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
3702 | printk(" %2.2x", smi_msg->data[m]); |
3703 | printk("\n"); | |
3704 | } | |
3705 | #endif | |
882fe011 | 3706 | return smi_msg; |
1da177e4 LT |
3707 | } |
3708 | ||
393d2cc3 CM |
3709 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
3710 | struct list_head *timeouts, long timeout_period, | |
3711 | int slot, unsigned long *flags) | |
3712 | { | |
b2c03941 CM |
3713 | struct ipmi_recv_msg *msg; |
3714 | struct ipmi_smi_handlers *handlers; | |
3715 | ||
3716 | if (intf->intf_num == -1) | |
3717 | return; | |
393d2cc3 CM |
3718 | |
3719 | if (!ent->inuse) | |
3720 | return; | |
3721 | ||
3722 | ent->timeout -= timeout_period; | |
3723 | if (ent->timeout > 0) | |
3724 | return; | |
3725 | ||
3726 | if (ent->retries_left == 0) { | |
3727 | /* The message has used all its retries. */ | |
3728 | ent->inuse = 0; | |
3729 | msg = ent->recv_msg; | |
3730 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 3731 | if (ent->broadcast) |
b2655f26 | 3732 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
393d2cc3 | 3733 | else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) |
b2655f26 | 3734 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 3735 | else |
b2655f26 | 3736 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
3737 | } else { |
3738 | struct ipmi_smi_msg *smi_msg; | |
3739 | /* More retries, send again. */ | |
3740 | ||
c70d7499 CM |
3741 | /* |
3742 | * Start with the max timer, set to normal timer after | |
3743 | * the message is sent. | |
3744 | */ | |
393d2cc3 CM |
3745 | ent->timeout = MAX_MSG_TIMEOUT; |
3746 | ent->retries_left--; | |
393d2cc3 | 3747 | if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) |
b2655f26 | 3748 | ipmi_inc_stat(intf, retransmitted_lan_commands); |
393d2cc3 | 3749 | else |
b2655f26 | 3750 | ipmi_inc_stat(intf, retransmitted_ipmb_commands); |
393d2cc3 CM |
3751 | |
3752 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, | |
3753 | ent->seqid); | |
8a3628d5 | 3754 | if (!smi_msg) |
393d2cc3 CM |
3755 | return; |
3756 | ||
3757 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 3758 | |
c70d7499 CM |
3759 | /* |
3760 | * Send the new message. We send with a zero | |
3761 | * priority. It timed out, I doubt time is that | |
3762 | * critical now, and high priority messages are really | |
3763 | * only for messages to the local MC, which don't get | |
3764 | * resent. | |
3765 | */ | |
b2c03941 CM |
3766 | handlers = intf->handlers; |
3767 | if (handlers) | |
3768 | intf->handlers->sender(intf->send_info, | |
3769 | smi_msg, 0); | |
3770 | else | |
3771 | ipmi_free_smi_msg(smi_msg); | |
3772 | ||
393d2cc3 CM |
3773 | spin_lock_irqsave(&intf->seq_lock, *flags); |
3774 | } | |
3775 | } | |
3776 | ||
3777 | static void ipmi_timeout_handler(long timeout_period) | |
1da177e4 LT |
3778 | { |
3779 | ipmi_smi_t intf; | |
3780 | struct list_head timeouts; | |
3781 | struct ipmi_recv_msg *msg, *msg2; | |
3782 | struct ipmi_smi_msg *smi_msg, *smi_msg2; | |
3783 | unsigned long flags; | |
bca0324d | 3784 | int i; |
1da177e4 | 3785 | |
bca0324d CM |
3786 | rcu_read_lock(); |
3787 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 | 3788 | /* See if any waiting messages need to be processed. */ |
393d2cc3 | 3789 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); |
8a3628d5 CM |
3790 | list_for_each_entry_safe(smi_msg, smi_msg2, |
3791 | &intf->waiting_msgs, link) { | |
3792 | if (!handle_new_recv_msg(intf, smi_msg)) { | |
1da177e4 LT |
3793 | list_del(&smi_msg->link); |
3794 | ipmi_free_smi_msg(smi_msg); | |
3795 | } else { | |
c70d7499 CM |
3796 | /* |
3797 | * To preserve message order, quit if we | |
3798 | * can't handle a message. | |
3799 | */ | |
1da177e4 LT |
3800 | break; |
3801 | } | |
3802 | } | |
393d2cc3 | 3803 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); |
1da177e4 | 3804 | |
c70d7499 CM |
3805 | /* |
3806 | * Go through the seq table and find any messages that | |
3807 | * have timed out, putting them in the timeouts | |
3808 | * list. | |
3809 | */ | |
41c57a87 | 3810 | INIT_LIST_HEAD(&timeouts); |
393d2cc3 | 3811 | spin_lock_irqsave(&intf->seq_lock, flags); |
bca0324d CM |
3812 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) |
3813 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
3814 | &timeouts, timeout_period, i, | |
393d2cc3 CM |
3815 | &flags); |
3816 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
3817 | ||
3818 | list_for_each_entry_safe(msg, msg2, &timeouts, link) | |
b2c03941 | 3819 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); |
b9675136 CM |
3820 | |
3821 | /* | |
3822 | * Maintenance mode handling. Check the timeout | |
3823 | * optimistically before we claim the lock. It may | |
3824 | * mean a timeout gets missed occasionally, but that | |
3825 | * only means the timeout gets extended by one period | |
3826 | * in that case. No big deal, and it avoids the lock | |
3827 | * most of the time. | |
3828 | */ | |
3829 | if (intf->auto_maintenance_timeout > 0) { | |
3830 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
3831 | if (intf->auto_maintenance_timeout > 0) { | |
3832 | intf->auto_maintenance_timeout | |
3833 | -= timeout_period; | |
3834 | if (!intf->maintenance_mode | |
c70d7499 | 3835 | && (intf->auto_maintenance_timeout <= 0)) { |
b9675136 CM |
3836 | intf->maintenance_mode_enable = 0; |
3837 | maintenance_mode_update(intf); | |
3838 | } | |
3839 | } | |
3840 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
3841 | flags); | |
3842 | } | |
1da177e4 | 3843 | } |
bca0324d | 3844 | rcu_read_unlock(); |
1da177e4 LT |
3845 | } |
3846 | ||
3847 | static void ipmi_request_event(void) | |
3848 | { | |
b2c03941 CM |
3849 | ipmi_smi_t intf; |
3850 | struct ipmi_smi_handlers *handlers; | |
1da177e4 | 3851 | |
bca0324d | 3852 | rcu_read_lock(); |
c70d7499 CM |
3853 | /* |
3854 | * Called from the timer, no need to check if handlers is | |
3855 | * valid. | |
3856 | */ | |
b2c03941 | 3857 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b9675136 CM |
3858 | /* No event requests when in maintenance mode. */ |
3859 | if (intf->maintenance_mode_enable) | |
3860 | continue; | |
3861 | ||
b2c03941 CM |
3862 | handlers = intf->handlers; |
3863 | if (handlers) | |
3864 | handlers->request_events(intf->send_info); | |
3865 | } | |
bca0324d | 3866 | rcu_read_unlock(); |
1da177e4 LT |
3867 | } |
3868 | ||
3869 | static struct timer_list ipmi_timer; | |
3870 | ||
3871 | /* Call every ~100 ms. */ | |
3872 | #define IPMI_TIMEOUT_TIME 100 | |
3873 | ||
3874 | /* How many jiffies does it take to get to the timeout time. */ | |
3875 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
3876 | ||
c70d7499 CM |
3877 | /* |
3878 | * Request events from the queue every second (this is the number of | |
3879 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
3880 | * future, IPMI will add a way to know immediately if an event is in | |
3881 | * the queue and this silliness can go away. | |
3882 | */ | |
1da177e4 LT |
3883 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) |
3884 | ||
8f43f84f | 3885 | static atomic_t stop_operation; |
1da177e4 LT |
3886 | static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; |
3887 | ||
3888 | static void ipmi_timeout(unsigned long data) | |
3889 | { | |
8f43f84f | 3890 | if (atomic_read(&stop_operation)) |
1da177e4 | 3891 | return; |
1da177e4 LT |
3892 | |
3893 | ticks_to_req_ev--; | |
3894 | if (ticks_to_req_ev == 0) { | |
3895 | ipmi_request_event(); | |
3896 | ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
3897 | } | |
3898 | ||
3899 | ipmi_timeout_handler(IPMI_TIMEOUT_TIME); | |
3900 | ||
8f43f84f | 3901 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
1da177e4 LT |
3902 | } |
3903 | ||
3904 | ||
3905 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
3906 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
3907 | ||
3908 | /* FIXME - convert these to slabs. */ | |
3909 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
3910 | { | |
3911 | atomic_dec(&smi_msg_inuse_count); | |
3912 | kfree(msg); | |
3913 | } | |
3914 | ||
3915 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
3916 | { | |
3917 | struct ipmi_smi_msg *rv; | |
3918 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
3919 | if (rv) { | |
3920 | rv->done = free_smi_msg; | |
3921 | rv->user_data = NULL; | |
3922 | atomic_inc(&smi_msg_inuse_count); | |
3923 | } | |
3924 | return rv; | |
3925 | } | |
c70d7499 | 3926 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
3927 | |
3928 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
3929 | { | |
3930 | atomic_dec(&recv_msg_inuse_count); | |
3931 | kfree(msg); | |
3932 | } | |
3933 | ||
74006309 | 3934 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
3935 | { |
3936 | struct ipmi_recv_msg *rv; | |
3937 | ||
3938 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
3939 | if (rv) { | |
a9eec556 | 3940 | rv->user = NULL; |
1da177e4 LT |
3941 | rv->done = free_recv_msg; |
3942 | atomic_inc(&recv_msg_inuse_count); | |
3943 | } | |
3944 | return rv; | |
3945 | } | |
3946 | ||
393d2cc3 CM |
3947 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
3948 | { | |
3949 | if (msg->user) | |
3950 | kref_put(&msg->user->refcount, free_user); | |
3951 | msg->done(msg); | |
3952 | } | |
c70d7499 | 3953 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 3954 | |
1da177e4 LT |
3955 | #ifdef CONFIG_IPMI_PANIC_EVENT |
3956 | ||
3957 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) | |
3958 | { | |
3959 | } | |
3960 | ||
3961 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
3962 | { | |
3963 | } | |
3964 | ||
3965 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 3966 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3967 | { |
56a55ec6 CM |
3968 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3969 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
3970 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 3971 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 3972 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
3973 | intf->event_receiver = msg->msg.data[1]; |
3974 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
3975 | } |
3976 | } | |
3977 | ||
56a55ec6 | 3978 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 3979 | { |
56a55ec6 CM |
3980 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3981 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
3982 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
3983 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
3984 | /* | |
3985 | * A get device id command, save if we are an event | |
3986 | * receiver or generator. | |
3987 | */ | |
56a55ec6 CM |
3988 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
3989 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
3990 | } |
3991 | } | |
3992 | #endif | |
3993 | ||
3994 | static void send_panic_events(char *str) | |
3995 | { | |
3996 | struct kernel_ipmi_msg msg; | |
3997 | ipmi_smi_t intf; | |
3998 | unsigned char data[16]; | |
1da177e4 LT |
3999 | struct ipmi_system_interface_addr *si; |
4000 | struct ipmi_addr addr; | |
4001 | struct ipmi_smi_msg smi_msg; | |
4002 | struct ipmi_recv_msg recv_msg; | |
4003 | ||
4004 | si = (struct ipmi_system_interface_addr *) &addr; | |
4005 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4006 | si->channel = IPMI_BMC_CHANNEL; | |
4007 | si->lun = 0; | |
4008 | ||
4009 | /* Fill in an event telling that we have failed. */ | |
4010 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4011 | msg.cmd = 2; /* Platform event command. */ | |
4012 | msg.data = data; | |
4013 | msg.data_len = 8; | |
cda315ab | 4014 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4015 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4016 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4017 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4018 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4019 | ||
c70d7499 CM |
4020 | /* |
4021 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4022 | * to make the panic events more useful. | |
4023 | */ | |
1da177e4 LT |
4024 | if (str) { |
4025 | data[3] = str[0]; | |
4026 | data[6] = str[1]; | |
4027 | data[7] = str[2]; | |
4028 | } | |
4029 | ||
4030 | smi_msg.done = dummy_smi_done_handler; | |
4031 | recv_msg.done = dummy_recv_done_handler; | |
4032 | ||
4033 | /* For every registered interface, send the event. */ | |
bca0324d | 4034 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4035 | if (!intf->handlers) |
4036 | /* Interface is not ready. */ | |
1da177e4 LT |
4037 | continue; |
4038 | ||
5956dce1 | 4039 | intf->run_to_completion = 1; |
1da177e4 LT |
4040 | /* Send the event announcing the panic. */ |
4041 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
4042 | i_ipmi_request(NULL, | |
4043 | intf, | |
4044 | &addr, | |
4045 | 0, | |
4046 | &msg, | |
56a55ec6 | 4047 | intf, |
1da177e4 LT |
4048 | &smi_msg, |
4049 | &recv_msg, | |
4050 | 0, | |
c14979b9 CM |
4051 | intf->channels[0].address, |
4052 | intf->channels[0].lun, | |
1da177e4 LT |
4053 | 0, 1); /* Don't retry, and don't wait. */ |
4054 | } | |
4055 | ||
4056 | #ifdef CONFIG_IPMI_PANIC_STRING | |
c70d7499 CM |
4057 | /* |
4058 | * On every interface, dump a bunch of OEM event holding the | |
4059 | * string. | |
4060 | */ | |
4061 | if (!str) | |
1da177e4 LT |
4062 | return; |
4063 | ||
bca0324d CM |
4064 | /* For every registered interface, send the event. */ |
4065 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4066 | char *p = str; |
4067 | struct ipmi_ipmb_addr *ipmb; | |
4068 | int j; | |
4069 | ||
bca0324d CM |
4070 | if (intf->intf_num == -1) |
4071 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4072 | continue; |
4073 | ||
78ba2faf CM |
4074 | /* |
4075 | * intf_num is used as an marker to tell if the | |
4076 | * interface is valid. Thus we need a read barrier to | |
4077 | * make sure data fetched before checking intf_num | |
4078 | * won't be used. | |
4079 | */ | |
4080 | smp_rmb(); | |
4081 | ||
c70d7499 CM |
4082 | /* |
4083 | * First job here is to figure out where to send the | |
4084 | * OEM events. There's no way in IPMI to send OEM | |
4085 | * events using an event send command, so we have to | |
4086 | * find the SEL to put them in and stick them in | |
4087 | * there. | |
4088 | */ | |
1da177e4 LT |
4089 | |
4090 | /* Get capabilities from the get device id. */ | |
4091 | intf->local_sel_device = 0; | |
4092 | intf->local_event_generator = 0; | |
4093 | intf->event_receiver = 0; | |
4094 | ||
4095 | /* Request the device info from the local MC. */ | |
4096 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4097 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4098 | msg.data = NULL; | |
4099 | msg.data_len = 0; | |
4100 | intf->null_user_handler = device_id_fetcher; | |
4101 | i_ipmi_request(NULL, | |
4102 | intf, | |
4103 | &addr, | |
4104 | 0, | |
4105 | &msg, | |
56a55ec6 | 4106 | intf, |
1da177e4 LT |
4107 | &smi_msg, |
4108 | &recv_msg, | |
4109 | 0, | |
c14979b9 CM |
4110 | intf->channels[0].address, |
4111 | intf->channels[0].lun, | |
1da177e4 LT |
4112 | 0, 1); /* Don't retry, and don't wait. */ |
4113 | ||
4114 | if (intf->local_event_generator) { | |
4115 | /* Request the event receiver from the local MC. */ | |
4116 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4117 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4118 | msg.data = NULL; | |
4119 | msg.data_len = 0; | |
4120 | intf->null_user_handler = event_receiver_fetcher; | |
4121 | i_ipmi_request(NULL, | |
4122 | intf, | |
4123 | &addr, | |
4124 | 0, | |
4125 | &msg, | |
56a55ec6 | 4126 | intf, |
1da177e4 LT |
4127 | &smi_msg, |
4128 | &recv_msg, | |
4129 | 0, | |
c14979b9 CM |
4130 | intf->channels[0].address, |
4131 | intf->channels[0].lun, | |
1da177e4 LT |
4132 | 0, 1); /* no retry, and no wait. */ |
4133 | } | |
4134 | intf->null_user_handler = NULL; | |
4135 | ||
c70d7499 CM |
4136 | /* |
4137 | * Validate the event receiver. The low bit must not | |
4138 | * be 1 (it must be a valid IPMB address), it cannot | |
4139 | * be zero, and it must not be my address. | |
4140 | */ | |
4141 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4142 | && (intf->event_receiver != 0) |
c70d7499 CM |
4143 | && (intf->event_receiver != intf->channels[0].address)) { |
4144 | /* | |
4145 | * The event receiver is valid, send an IPMB | |
4146 | * message. | |
4147 | */ | |
1da177e4 LT |
4148 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4149 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4150 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4151 | ipmb->lun = intf->event_receiver_lun; | |
4152 | ipmb->slave_addr = intf->event_receiver; | |
4153 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4154 | /* |
4155 | * The event receiver was not valid (or was | |
4156 | * me), but I am an SEL device, just dump it | |
4157 | * in my SEL. | |
4158 | */ | |
1da177e4 LT |
4159 | si = (struct ipmi_system_interface_addr *) &addr; |
4160 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4161 | si->channel = IPMI_BMC_CHANNEL; | |
4162 | si->lun = 0; | |
4163 | } else | |
4164 | continue; /* No where to send the event. */ | |
4165 | ||
1da177e4 LT |
4166 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4167 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4168 | msg.data = data; | |
4169 | msg.data_len = 16; | |
4170 | ||
4171 | j = 0; | |
4172 | while (*p) { | |
4173 | int size = strlen(p); | |
4174 | ||
4175 | if (size > 11) | |
4176 | size = 11; | |
4177 | data[0] = 0; | |
4178 | data[1] = 0; | |
4179 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4180 | data[3] = intf->channels[0].address; |
1da177e4 | 4181 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4182 | /* |
4183 | * Always give 11 bytes, so strncpy will fill | |
4184 | * it with zeroes for me. | |
4185 | */ | |
1da177e4 LT |
4186 | strncpy(data+5, p, 11); |
4187 | p += size; | |
4188 | ||
4189 | i_ipmi_request(NULL, | |
4190 | intf, | |
4191 | &addr, | |
4192 | 0, | |
4193 | &msg, | |
56a55ec6 | 4194 | intf, |
1da177e4 LT |
4195 | &smi_msg, |
4196 | &recv_msg, | |
4197 | 0, | |
c14979b9 CM |
4198 | intf->channels[0].address, |
4199 | intf->channels[0].lun, | |
1da177e4 LT |
4200 | 0, 1); /* no retry, and no wait. */ |
4201 | } | |
c70d7499 | 4202 | } |
1da177e4 LT |
4203 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
4204 | } | |
4205 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
4206 | ||
0c8204b3 | 4207 | static int has_panicked; |
1da177e4 LT |
4208 | |
4209 | static int panic_event(struct notifier_block *this, | |
4210 | unsigned long event, | |
c70d7499 | 4211 | void *ptr) |
1da177e4 | 4212 | { |
1da177e4 LT |
4213 | ipmi_smi_t intf; |
4214 | ||
f18190bd | 4215 | if (has_panicked) |
1da177e4 | 4216 | return NOTIFY_DONE; |
f18190bd | 4217 | has_panicked = 1; |
1da177e4 LT |
4218 | |
4219 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4220 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4221 | if (!intf->handlers) |
4222 | /* Interface is not ready. */ | |
1da177e4 LT |
4223 | continue; |
4224 | ||
5956dce1 | 4225 | intf->run_to_completion = 1; |
1da177e4 LT |
4226 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
4227 | } | |
4228 | ||
4229 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
4230 | send_panic_events(ptr); | |
4231 | #endif | |
4232 | ||
4233 | return NOTIFY_DONE; | |
4234 | } | |
4235 | ||
4236 | static struct notifier_block panic_block = { | |
4237 | .notifier_call = panic_event, | |
4238 | .next = NULL, | |
4239 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4240 | }; | |
4241 | ||
4242 | static int ipmi_init_msghandler(void) | |
4243 | { | |
50c812b2 | 4244 | int rv; |
1da177e4 LT |
4245 | |
4246 | if (initialized) | |
4247 | return 0; | |
4248 | ||
fe2d5ffc | 4249 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4250 | if (rv) { |
4251 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4252 | return rv; | |
4253 | } | |
4254 | ||
1da177e4 | 4255 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4256 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4257 | |
3b625943 | 4258 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4259 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4260 | if (!proc_ipmi_root) { | |
4261 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
4262 | return -ENOMEM; | |
4263 | } | |
4264 | ||
3b625943 | 4265 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4266 | |
409035e0 CM |
4267 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4268 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4269 | |
e041c683 | 4270 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4271 | |
4272 | initialized = 1; | |
4273 | ||
4274 | return 0; | |
4275 | } | |
4276 | ||
4277 | static __init int ipmi_init_msghandler_mod(void) | |
4278 | { | |
4279 | ipmi_init_msghandler(); | |
4280 | return 0; | |
4281 | } | |
4282 | ||
4283 | static __exit void cleanup_ipmi(void) | |
4284 | { | |
4285 | int count; | |
4286 | ||
4287 | if (!initialized) | |
4288 | return; | |
4289 | ||
e041c683 | 4290 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4291 | |
c70d7499 CM |
4292 | /* |
4293 | * This can't be called if any interfaces exist, so no worry | |
4294 | * about shutting down the interfaces. | |
4295 | */ | |
1da177e4 | 4296 | |
c70d7499 CM |
4297 | /* |
4298 | * Tell the timer to stop, then wait for it to stop. This | |
4299 | * avoids problems with race conditions removing the timer | |
4300 | * here. | |
4301 | */ | |
8f43f84f CM |
4302 | atomic_inc(&stop_operation); |
4303 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4304 | |
3b625943 | 4305 | #ifdef CONFIG_PROC_FS |
3542ae4c | 4306 | remove_proc_entry(proc_ipmi_root->name, NULL); |
3b625943 | 4307 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4308 | |
fe2d5ffc | 4309 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4310 | |
1da177e4 LT |
4311 | initialized = 0; |
4312 | ||
4313 | /* Check for buffer leaks. */ | |
4314 | count = atomic_read(&smi_msg_inuse_count); | |
4315 | if (count != 0) | |
4316 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4317 | count); | |
4318 | count = atomic_read(&recv_msg_inuse_count); | |
4319 | if (count != 0) | |
4320 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4321 | count); | |
4322 | } | |
4323 | module_exit(cleanup_ipmi); | |
4324 | ||
4325 | module_init(ipmi_init_msghandler_mod); | |
4326 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4327 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4328 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4329 | " interface."); | |
1fdd75bd | 4330 | MODULE_VERSION(IPMI_DRIVER_VERSION); |