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1da177e4 LT |
1 | /* |
2 | * ipmi_msghandler.c | |
3 | * | |
4 | * Incoming and outgoing message routing for an IPMI interface. | |
5 | * | |
6 | * Author: MontaVista Software, Inc. | |
7 | * Corey Minyard <minyard@mvista.com> | |
8 | * source@mvista.com | |
9 | * | |
10 | * Copyright 2002 MontaVista Software Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | * | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
26 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
27 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License along | |
30 | * with this program; if not, write to the Free Software Foundation, Inc., | |
31 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/errno.h> | |
1da177e4 | 36 | #include <linux/poll.h> |
a99bbaf5 | 37 | #include <linux/sched.h> |
07412736 | 38 | #include <linux/seq_file.h> |
1da177e4 | 39 | #include <linux/spinlock.h> |
d6dfd131 | 40 | #include <linux/mutex.h> |
1da177e4 LT |
41 | #include <linux/slab.h> |
42 | #include <linux/ipmi.h> | |
43 | #include <linux/ipmi_smi.h> | |
44 | #include <linux/notifier.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/proc_fs.h> | |
393d2cc3 | 47 | #include <linux/rcupdate.h> |
7adf579c | 48 | #include <linux/interrupt.h> |
1c9f98d1 | 49 | #include <linux/moduleparam.h> |
1da177e4 LT |
50 | |
51 | #define PFX "IPMI message handler: " | |
1fdd75bd | 52 | |
f7caa1b5 | 53 | #define IPMI_DRIVER_VERSION "39.2" |
1da177e4 LT |
54 | |
55 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
56 | static int ipmi_init_msghandler(void); | |
7adf579c CM |
57 | static void smi_recv_tasklet(unsigned long); |
58 | static void handle_new_recv_msgs(ipmi_smi_t intf); | |
89986496 | 59 | static void need_waiter(ipmi_smi_t intf); |
7ea0ed2b CM |
60 | static int handle_one_recv_msg(ipmi_smi_t intf, |
61 | struct ipmi_smi_msg *msg); | |
1da177e4 | 62 | |
0c8204b3 | 63 | static int initialized; |
1da177e4 | 64 | |
1c9f98d1 CM |
65 | enum ipmi_panic_event_op { |
66 | IPMI_SEND_PANIC_EVENT_NONE, | |
67 | IPMI_SEND_PANIC_EVENT, | |
68 | IPMI_SEND_PANIC_EVENT_STRING | |
69 | }; | |
70 | #ifdef CONFIG_IPMI_PANIC_STRING | |
71 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT_STRING | |
72 | #elif defined(CONFIG_IPMI_PANIC_EVENT) | |
73 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT | |
74 | #else | |
75 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT_NONE | |
76 | #endif | |
77 | static enum ipmi_panic_event_op ipmi_send_panic_event = IPMI_PANIC_DEFAULT; | |
78 | ||
79 | static int panic_op_write_handler(const char *val, | |
80 | const struct kernel_param *kp) | |
81 | { | |
82 | char valcp[16]; | |
83 | char *s; | |
84 | ||
85 | strncpy(valcp, val, 16); | |
86 | valcp[15] = '\0'; | |
87 | ||
88 | s = strstrip(valcp); | |
89 | ||
90 | if (strcmp(s, "none") == 0) | |
91 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT_NONE; | |
92 | else if (strcmp(s, "event") == 0) | |
93 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT; | |
94 | else if (strcmp(s, "string") == 0) | |
95 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT_STRING; | |
96 | else | |
97 | return -EINVAL; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static int panic_op_read_handler(char *buffer, const struct kernel_param *kp) | |
103 | { | |
104 | switch (ipmi_send_panic_event) { | |
105 | case IPMI_SEND_PANIC_EVENT_NONE: | |
106 | strcpy(buffer, "none"); | |
107 | break; | |
108 | ||
109 | case IPMI_SEND_PANIC_EVENT: | |
110 | strcpy(buffer, "event"); | |
111 | break; | |
112 | ||
113 | case IPMI_SEND_PANIC_EVENT_STRING: | |
114 | strcpy(buffer, "string"); | |
115 | break; | |
116 | ||
117 | default: | |
118 | strcpy(buffer, "???"); | |
119 | break; | |
120 | } | |
121 | ||
122 | return strlen(buffer); | |
123 | } | |
124 | ||
125 | static const struct kernel_param_ops panic_op_ops = { | |
126 | .set = panic_op_write_handler, | |
127 | .get = panic_op_read_handler | |
128 | }; | |
129 | module_param_cb(panic_op, &panic_op_ops, NULL, 0600); | |
130 | MODULE_PARM_DESC(panic_op, "Sets if the IPMI driver will attempt to store panic information in the event log in the event of a panic. Set to 'none' for no, 'event' for a single event, or 'string' for a generic event and the panic string in IPMI OEM events."); | |
131 | ||
132 | ||
3b625943 | 133 | #ifdef CONFIG_PROC_FS |
0c8204b3 | 134 | static struct proc_dir_entry *proc_ipmi_root; |
3b625943 | 135 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 136 | |
b9675136 CM |
137 | /* Remain in auto-maintenance mode for this amount of time (in ms). */ |
138 | #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000 | |
139 | ||
1da177e4 LT |
140 | #define MAX_EVENTS_IN_QUEUE 25 |
141 | ||
c70d7499 CM |
142 | /* |
143 | * Don't let a message sit in a queue forever, always time it with at lest | |
144 | * the max message timer. This is in milliseconds. | |
145 | */ | |
1da177e4 LT |
146 | #define MAX_MSG_TIMEOUT 60000 |
147 | ||
89986496 CM |
148 | /* Call every ~1000 ms. */ |
149 | #define IPMI_TIMEOUT_TIME 1000 | |
150 | ||
151 | /* How many jiffies does it take to get to the timeout time. */ | |
152 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
153 | ||
154 | /* | |
155 | * Request events from the queue every second (this is the number of | |
156 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
157 | * future, IPMI will add a way to know immediately if an event is in | |
158 | * the queue and this silliness can go away. | |
159 | */ | |
160 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
161 | ||
393d2cc3 CM |
162 | /* |
163 | * The main "user" data structure. | |
164 | */ | |
c70d7499 | 165 | struct ipmi_user { |
1da177e4 LT |
166 | struct list_head link; |
167 | ||
7aefac26 CM |
168 | /* Set to false when the user is destroyed. */ |
169 | bool valid; | |
393d2cc3 CM |
170 | |
171 | struct kref refcount; | |
172 | ||
1da177e4 | 173 | /* The upper layer that handles receive messages. */ |
210af2a5 | 174 | const struct ipmi_user_hndl *handler; |
1da177e4 LT |
175 | void *handler_data; |
176 | ||
177 | /* The interface this user is bound to. */ | |
178 | ipmi_smi_t intf; | |
179 | ||
180 | /* Does this interface receive IPMI events? */ | |
89986496 | 181 | bool gets_events; |
1da177e4 LT |
182 | }; |
183 | ||
c70d7499 | 184 | struct cmd_rcvr { |
1da177e4 LT |
185 | struct list_head link; |
186 | ||
187 | ipmi_user_t user; | |
188 | unsigned char netfn; | |
189 | unsigned char cmd; | |
c69c3127 | 190 | unsigned int chans; |
393d2cc3 CM |
191 | |
192 | /* | |
193 | * This is used to form a linked lised during mass deletion. | |
194 | * Since this is in an RCU list, we cannot use the link above | |
195 | * or change any data until the RCU period completes. So we | |
196 | * use this next variable during mass deletion so we can have | |
197 | * a list and don't have to wait and restart the search on | |
c70d7499 CM |
198 | * every individual deletion of a command. |
199 | */ | |
393d2cc3 | 200 | struct cmd_rcvr *next; |
1da177e4 LT |
201 | }; |
202 | ||
c70d7499 | 203 | struct seq_table { |
1da177e4 LT |
204 | unsigned int inuse : 1; |
205 | unsigned int broadcast : 1; | |
206 | ||
207 | unsigned long timeout; | |
208 | unsigned long orig_timeout; | |
209 | unsigned int retries_left; | |
210 | ||
c70d7499 CM |
211 | /* |
212 | * To verify on an incoming send message response that this is | |
213 | * the message that the response is for, we keep a sequence id | |
214 | * and increment it every time we send a message. | |
215 | */ | |
1da177e4 LT |
216 | long seqid; |
217 | ||
c70d7499 CM |
218 | /* |
219 | * This is held so we can properly respond to the message on a | |
220 | * timeout, and it is used to hold the temporary data for | |
221 | * retransmission, too. | |
222 | */ | |
1da177e4 LT |
223 | struct ipmi_recv_msg *recv_msg; |
224 | }; | |
225 | ||
c70d7499 CM |
226 | /* |
227 | * Store the information in a msgid (long) to allow us to find a | |
228 | * sequence table entry from the msgid. | |
229 | */ | |
a24b5dd5 CM |
230 | #define STORE_SEQ_IN_MSGID(seq, seqid) \ |
231 | ((((seq) & 0x3f) << 26) | ((seqid) & 0x3ffffff)) | |
1da177e4 LT |
232 | |
233 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
234 | do { \ | |
a24b5dd5 CM |
235 | seq = (((msgid) >> 26) & 0x3f); \ |
236 | seqid = ((msgid) & 0x3ffffff); \ | |
c70d7499 | 237 | } while (0) |
1da177e4 | 238 | |
a24b5dd5 | 239 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3ffffff) |
1da177e4 | 240 | |
c70d7499 | 241 | struct ipmi_channel { |
1da177e4 LT |
242 | unsigned char medium; |
243 | unsigned char protocol; | |
c14979b9 | 244 | |
c70d7499 CM |
245 | /* |
246 | * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
247 | * but may be changed by the user. | |
248 | */ | |
c14979b9 CM |
249 | unsigned char address; |
250 | ||
c70d7499 CM |
251 | /* |
252 | * My LUN. This should generally stay the SMS LUN, but just in | |
253 | * case... | |
254 | */ | |
c14979b9 | 255 | unsigned char lun; |
1da177e4 LT |
256 | }; |
257 | ||
3b625943 | 258 | #ifdef CONFIG_PROC_FS |
c70d7499 | 259 | struct ipmi_proc_entry { |
1da177e4 LT |
260 | char *name; |
261 | struct ipmi_proc_entry *next; | |
262 | }; | |
3b625943 | 263 | #endif |
1da177e4 | 264 | |
c70d7499 | 265 | struct bmc_device { |
16639eb0 | 266 | struct platform_device pdev; |
50c812b2 CM |
267 | struct ipmi_device_id id; |
268 | unsigned char guid[16]; | |
269 | int guid_set; | |
16639eb0 CM |
270 | char name[16]; |
271 | struct kref usecount; | |
50c812b2 | 272 | }; |
16639eb0 | 273 | #define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev) |
50c812b2 | 274 | |
b2655f26 KB |
275 | /* |
276 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
277 | * structure. | |
278 | */ | |
73f2bdb9 CM |
279 | enum ipmi_stat_indexes { |
280 | /* Commands we got from the user that were invalid. */ | |
281 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 282 | |
73f2bdb9 CM |
283 | /* Commands we sent to the MC. */ |
284 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 285 | |
73f2bdb9 CM |
286 | /* Responses from the MC that were delivered to a user. */ |
287 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 288 | |
73f2bdb9 CM |
289 | /* Responses from the MC that were not delivered to a user. */ |
290 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 291 | |
73f2bdb9 CM |
292 | /* Commands we sent out to the IPMB bus. */ |
293 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 294 | |
73f2bdb9 CM |
295 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
296 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 297 | |
73f2bdb9 CM |
298 | /* Each retransmit increments this count. */ |
299 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 300 | |
73f2bdb9 CM |
301 | /* |
302 | * When a message times out (runs out of retransmits) this is | |
303 | * incremented. | |
304 | */ | |
305 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 306 | |
73f2bdb9 CM |
307 | /* |
308 | * This is like above, but for broadcasts. Broadcasts are | |
309 | * *not* included in the above count (they are expected to | |
310 | * time out). | |
311 | */ | |
312 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 313 | |
73f2bdb9 CM |
314 | /* Responses I have sent to the IPMB bus. */ |
315 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 316 | |
73f2bdb9 CM |
317 | /* The response was delivered to the user. */ |
318 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 319 | |
73f2bdb9 CM |
320 | /* The response had invalid data in it. */ |
321 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 322 | |
73f2bdb9 CM |
323 | /* The response didn't have anyone waiting for it. */ |
324 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 325 | |
73f2bdb9 CM |
326 | /* Commands we sent out to the IPMB bus. */ |
327 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 328 | |
73f2bdb9 CM |
329 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
330 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 331 | |
73f2bdb9 CM |
332 | /* Each retransmit increments this count. */ |
333 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 334 | |
73f2bdb9 CM |
335 | /* |
336 | * When a message times out (runs out of retransmits) this is | |
337 | * incremented. | |
338 | */ | |
339 | IPMI_STAT_timed_out_lan_commands, | |
340 | ||
341 | /* Responses I have sent to the IPMB bus. */ | |
342 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 343 | |
73f2bdb9 CM |
344 | /* The response was delivered to the user. */ |
345 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 346 | |
73f2bdb9 CM |
347 | /* The response had invalid data in it. */ |
348 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 349 | |
73f2bdb9 CM |
350 | /* The response didn't have anyone waiting for it. */ |
351 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 352 | |
73f2bdb9 CM |
353 | /* The command was delivered to the user. */ |
354 | IPMI_STAT_handled_commands, | |
b2655f26 | 355 | |
73f2bdb9 CM |
356 | /* The command had invalid data in it. */ |
357 | IPMI_STAT_invalid_commands, | |
b2655f26 | 358 | |
73f2bdb9 CM |
359 | /* The command didn't have anyone waiting for it. */ |
360 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 361 | |
73f2bdb9 CM |
362 | /* Invalid data in an event. */ |
363 | IPMI_STAT_invalid_events, | |
b2655f26 | 364 | |
73f2bdb9 CM |
365 | /* Events that were received with the proper format. */ |
366 | IPMI_STAT_events, | |
b2655f26 | 367 | |
25176ed6 CM |
368 | /* Retransmissions on IPMB that failed. */ |
369 | IPMI_STAT_dropped_rexmit_ipmb_commands, | |
370 | ||
371 | /* Retransmissions on LAN that failed. */ | |
372 | IPMI_STAT_dropped_rexmit_lan_commands, | |
b2655f26 | 373 | |
73f2bdb9 CM |
374 | /* This *must* remain last, add new values above this. */ |
375 | IPMI_NUM_STATS | |
376 | }; | |
b2655f26 KB |
377 | |
378 | ||
1da177e4 | 379 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 380 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 381 | struct ipmi_smi { |
1da177e4 LT |
382 | /* What interface number are we? */ |
383 | int intf_num; | |
384 | ||
393d2cc3 CM |
385 | struct kref refcount; |
386 | ||
7ea0ed2b CM |
387 | /* Set when the interface is being unregistered. */ |
388 | bool in_shutdown; | |
389 | ||
bca0324d CM |
390 | /* Used for a list of interfaces. */ |
391 | struct list_head link; | |
392 | ||
c70d7499 CM |
393 | /* |
394 | * The list of upper layers that are using me. seq_lock | |
395 | * protects this. | |
396 | */ | |
393d2cc3 | 397 | struct list_head users; |
1da177e4 | 398 | |
b2c03941 CM |
399 | /* Information to supply to users. */ |
400 | unsigned char ipmi_version_major; | |
401 | unsigned char ipmi_version_minor; | |
402 | ||
1da177e4 LT |
403 | /* Used for wake ups at startup. */ |
404 | wait_queue_head_t waitq; | |
405 | ||
50c812b2 CM |
406 | struct bmc_device *bmc; |
407 | char *my_dev_name; | |
1da177e4 | 408 | |
c70d7499 CM |
409 | /* |
410 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
411 | * must either be holding the ipmi_interfaces_mutex or be in |
412 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
413 | * value into a local variable and make sure it is not NULL. |
414 | */ | |
81d02b7f | 415 | const struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
416 | void *send_info; |
417 | ||
3b625943 | 418 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
419 | /* A list of proc entries for this interface. */ |
420 | struct mutex proc_entry_lock; | |
1da177e4 | 421 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 422 | #endif |
1da177e4 | 423 | |
50c812b2 CM |
424 | /* Driver-model device for the system interface. */ |
425 | struct device *si_dev; | |
426 | ||
c70d7499 CM |
427 | /* |
428 | * A table of sequence numbers for this interface. We use the | |
429 | * sequence numbers for IPMB messages that go out of the | |
430 | * interface to match them up with their responses. A routine | |
431 | * is called periodically to time the items in this list. | |
432 | */ | |
1da177e4 LT |
433 | spinlock_t seq_lock; |
434 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
435 | int curr_seq; | |
436 | ||
c70d7499 | 437 | /* |
7adf579c CM |
438 | * Messages queued for delivery. If delivery fails (out of memory |
439 | * for instance), They will stay in here to be processed later in a | |
440 | * periodic timer interrupt. The tasklet is for handling received | |
441 | * messages directly from the handler. | |
c70d7499 | 442 | */ |
65be7544 CM |
443 | spinlock_t waiting_rcv_msgs_lock; |
444 | struct list_head waiting_rcv_msgs; | |
7adf579c CM |
445 | atomic_t watchdog_pretimeouts_to_deliver; |
446 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 447 | |
7ea0ed2b CM |
448 | spinlock_t xmit_msgs_lock; |
449 | struct list_head xmit_msgs; | |
450 | struct ipmi_smi_msg *curr_msg; | |
451 | struct list_head hp_xmit_msgs; | |
452 | ||
c70d7499 CM |
453 | /* |
454 | * The list of command receivers that are registered for commands | |
455 | * on this interface. | |
456 | */ | |
d6dfd131 | 457 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
458 | struct list_head cmd_rcvrs; |
459 | ||
c70d7499 CM |
460 | /* |
461 | * Events that were queues because no one was there to receive | |
462 | * them. | |
463 | */ | |
1da177e4 LT |
464 | spinlock_t events_lock; /* For dealing with event stuff. */ |
465 | struct list_head waiting_events; | |
466 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
467 | char delivering_events; |
468 | char event_msg_printed; | |
89986496 CM |
469 | atomic_t event_waiters; |
470 | unsigned int ticks_to_req_ev; | |
471 | int last_needs_timer; | |
1da177e4 | 472 | |
c70d7499 CM |
473 | /* |
474 | * The event receiver for my BMC, only really used at panic | |
475 | * shutdown as a place to store this. | |
476 | */ | |
1da177e4 LT |
477 | unsigned char event_receiver; |
478 | unsigned char event_receiver_lun; | |
479 | unsigned char local_sel_device; | |
480 | unsigned char local_event_generator; | |
481 | ||
b9675136 CM |
482 | /* For handling of maintenance mode. */ |
483 | int maintenance_mode; | |
7aefac26 | 484 | bool maintenance_mode_enable; |
b9675136 CM |
485 | int auto_maintenance_timeout; |
486 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
487 | ||
c70d7499 CM |
488 | /* |
489 | * A cheap hack, if this is non-null and a message to an | |
490 | * interface comes in with a NULL user, call this routine with | |
491 | * it. Note that the message will still be freed by the | |
492 | * caller. This only works on the system interface. | |
493 | */ | |
56a55ec6 | 494 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 495 | |
c70d7499 CM |
496 | /* |
497 | * When we are scanning the channels for an SMI, this will | |
498 | * tell which channel we are scanning. | |
499 | */ | |
1da177e4 LT |
500 | int curr_channel; |
501 | ||
502 | /* Channel information */ | |
503 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
504 | ||
505 | /* Proc FS stuff. */ | |
506 | struct proc_dir_entry *proc_dir; | |
507 | char proc_dir_name[10]; | |
508 | ||
b2655f26 | 509 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
510 | |
511 | /* | |
512 | * run_to_completion duplicate of smb_info, smi_info | |
513 | * and ipmi_serial_info structures. Used to decrease numbers of | |
514 | * parameters passed by "low" level IPMI code. | |
515 | */ | |
516 | int run_to_completion; | |
1da177e4 | 517 | }; |
50c812b2 | 518 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 519 | |
50c812b2 CM |
520 | /** |
521 | * The driver model view of the IPMI messaging driver. | |
522 | */ | |
fe2d5ffc DW |
523 | static struct platform_driver ipmidriver = { |
524 | .driver = { | |
525 | .name = "ipmi", | |
526 | .bus = &platform_bus_type | |
527 | } | |
50c812b2 CM |
528 | }; |
529 | static DEFINE_MUTEX(ipmidriver_mutex); | |
530 | ||
bed9759b | 531 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 532 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 533 | |
c70d7499 CM |
534 | /* |
535 | * List of watchers that want to know when smi's are added and deleted. | |
536 | */ | |
bed9759b | 537 | static LIST_HEAD(smi_watchers); |
b2c03941 | 538 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 539 | |
b2655f26 KB |
540 | #define ipmi_inc_stat(intf, stat) \ |
541 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
542 | #define ipmi_get_stat(intf, stat) \ | |
543 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
544 | ||
99ee6735 LC |
545 | static const char * const addr_src_to_str[] = { |
546 | "invalid", "hotmod", "hardcoded", "SPMI", "ACPI", "SMBIOS", "PCI", | |
b07b58a3 | 547 | "device-tree" |
99ee6735 | 548 | }; |
7e50387b CM |
549 | |
550 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src) | |
551 | { | |
b07b58a3 | 552 | if (src >= SI_LAST) |
7e50387b CM |
553 | src = 0; /* Invalid */ |
554 | return addr_src_to_str[src]; | |
555 | } | |
556 | EXPORT_SYMBOL(ipmi_addr_src_to_str); | |
557 | ||
25176ed6 CM |
558 | static int is_lan_addr(struct ipmi_addr *addr) |
559 | { | |
560 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
561 | } | |
562 | ||
563 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
564 | { | |
565 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
566 | } | |
567 | ||
568 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
569 | { | |
570 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
571 | } | |
b2655f26 | 572 | |
393d2cc3 CM |
573 | static void free_recv_msg_list(struct list_head *q) |
574 | { | |
575 | struct ipmi_recv_msg *msg, *msg2; | |
576 | ||
577 | list_for_each_entry_safe(msg, msg2, q, link) { | |
578 | list_del(&msg->link); | |
579 | ipmi_free_recv_msg(msg); | |
580 | } | |
581 | } | |
582 | ||
f3ce6a0e CM |
583 | static void free_smi_msg_list(struct list_head *q) |
584 | { | |
585 | struct ipmi_smi_msg *msg, *msg2; | |
586 | ||
587 | list_for_each_entry_safe(msg, msg2, q, link) { | |
588 | list_del(&msg->link); | |
589 | ipmi_free_smi_msg(msg); | |
590 | } | |
591 | } | |
592 | ||
393d2cc3 CM |
593 | static void clean_up_interface_data(ipmi_smi_t intf) |
594 | { | |
595 | int i; | |
596 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
597 | struct list_head list; |
598 | ||
7adf579c CM |
599 | tasklet_kill(&intf->recv_tasklet); |
600 | ||
65be7544 | 601 | free_smi_msg_list(&intf->waiting_rcv_msgs); |
393d2cc3 CM |
602 | free_recv_msg_list(&intf->waiting_events); |
603 | ||
78ba2faf CM |
604 | /* |
605 | * Wholesale remove all the entries from the list in the | |
606 | * interface and wait for RCU to know that none are in use. | |
607 | */ | |
d6dfd131 | 608 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
609 | INIT_LIST_HEAD(&list); |
610 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 611 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
612 | |
613 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
614 | kfree(rcvr); | |
615 | ||
616 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
617 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 618 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 619 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
620 | } |
621 | } | |
622 | ||
623 | static void intf_free(struct kref *ref) | |
624 | { | |
625 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
626 | ||
627 | clean_up_interface_data(intf); | |
628 | kfree(intf); | |
629 | } | |
630 | ||
bca0324d | 631 | struct watcher_entry { |
b2c03941 CM |
632 | int intf_num; |
633 | ipmi_smi_t intf; | |
bca0324d | 634 | struct list_head link; |
bca0324d CM |
635 | }; |
636 | ||
1da177e4 LT |
637 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
638 | { | |
bca0324d | 639 | ipmi_smi_t intf; |
e381d1c4 | 640 | LIST_HEAD(to_deliver); |
bca0324d CM |
641 | struct watcher_entry *e, *e2; |
642 | ||
b2c03941 CM |
643 | mutex_lock(&smi_watchers_mutex); |
644 | ||
bca0324d CM |
645 | mutex_lock(&ipmi_interfaces_mutex); |
646 | ||
b2c03941 | 647 | /* Build a list of things to deliver. */ |
78ba2faf | 648 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
649 | if (intf->intf_num == -1) |
650 | continue; | |
651 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
652 | if (!e) | |
653 | goto out_err; | |
b2c03941 CM |
654 | kref_get(&intf->refcount); |
655 | e->intf = intf; | |
bca0324d CM |
656 | e->intf_num = intf->intf_num; |
657 | list_add_tail(&e->link, &to_deliver); | |
658 | } | |
1da177e4 | 659 | |
b2c03941 CM |
660 | /* We will succeed, so add it to the list. */ |
661 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
662 | |
663 | mutex_unlock(&ipmi_interfaces_mutex); | |
664 | ||
665 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
666 | list_del(&e->link); | |
b2c03941 CM |
667 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
668 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 669 | kfree(e); |
1da177e4 | 670 | } |
bca0324d | 671 | |
b2c03941 | 672 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 673 | |
1da177e4 | 674 | return 0; |
bca0324d CM |
675 | |
676 | out_err: | |
b2c03941 CM |
677 | mutex_unlock(&ipmi_interfaces_mutex); |
678 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
679 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
680 | list_del(&e->link); | |
b2c03941 | 681 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
682 | kfree(e); |
683 | } | |
684 | return -ENOMEM; | |
1da177e4 | 685 | } |
c70d7499 | 686 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
687 | |
688 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
689 | { | |
b2c03941 | 690 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 691 | list_del(&(watcher->link)); |
b2c03941 | 692 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
693 | return 0; |
694 | } | |
c70d7499 | 695 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 696 | |
b2c03941 CM |
697 | /* |
698 | * Must be called with smi_watchers_mutex held. | |
699 | */ | |
1da177e4 | 700 | static void |
50c812b2 | 701 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
702 | { |
703 | struct ipmi_smi_watcher *w; | |
704 | ||
1da177e4 LT |
705 | list_for_each_entry(w, &smi_watchers, link) { |
706 | if (try_module_get(w->owner)) { | |
50c812b2 | 707 | w->new_smi(i, dev); |
1da177e4 LT |
708 | module_put(w->owner); |
709 | } | |
710 | } | |
1da177e4 LT |
711 | } |
712 | ||
713 | static int | |
714 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
715 | { | |
716 | if (addr1->addr_type != addr2->addr_type) | |
717 | return 0; | |
718 | ||
719 | if (addr1->channel != addr2->channel) | |
720 | return 0; | |
721 | ||
722 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
723 | struct ipmi_system_interface_addr *smi_addr1 | |
724 | = (struct ipmi_system_interface_addr *) addr1; | |
725 | struct ipmi_system_interface_addr *smi_addr2 | |
726 | = (struct ipmi_system_interface_addr *) addr2; | |
727 | return (smi_addr1->lun == smi_addr2->lun); | |
728 | } | |
729 | ||
25176ed6 | 730 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
731 | struct ipmi_ipmb_addr *ipmb_addr1 |
732 | = (struct ipmi_ipmb_addr *) addr1; | |
733 | struct ipmi_ipmb_addr *ipmb_addr2 | |
734 | = (struct ipmi_ipmb_addr *) addr2; | |
735 | ||
736 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
737 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
738 | } | |
739 | ||
25176ed6 | 740 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
741 | struct ipmi_lan_addr *lan_addr1 |
742 | = (struct ipmi_lan_addr *) addr1; | |
743 | struct ipmi_lan_addr *lan_addr2 | |
744 | = (struct ipmi_lan_addr *) addr2; | |
745 | ||
746 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
747 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
748 | && (lan_addr1->session_handle | |
749 | == lan_addr2->session_handle) | |
750 | && (lan_addr1->lun == lan_addr2->lun)); | |
751 | } | |
752 | ||
753 | return 1; | |
754 | } | |
755 | ||
756 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
757 | { | |
c70d7499 | 758 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 759 | return -EINVAL; |
1da177e4 LT |
760 | |
761 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
762 | if (addr->channel != IPMI_BMC_CHANNEL) | |
763 | return -EINVAL; | |
764 | return 0; | |
765 | } | |
766 | ||
767 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 768 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
769 | || (addr->channel < 0)) |
770 | return -EINVAL; | |
771 | ||
25176ed6 | 772 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 773 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 774 | return -EINVAL; |
1da177e4 LT |
775 | return 0; |
776 | } | |
777 | ||
25176ed6 | 778 | if (is_lan_addr(addr)) { |
c70d7499 | 779 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 780 | return -EINVAL; |
1da177e4 LT |
781 | return 0; |
782 | } | |
783 | ||
784 | return -EINVAL; | |
785 | } | |
c70d7499 | 786 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
787 | |
788 | unsigned int ipmi_addr_length(int addr_type) | |
789 | { | |
790 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
791 | return sizeof(struct ipmi_system_interface_addr); | |
792 | ||
793 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 794 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 795 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
796 | |
797 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
798 | return sizeof(struct ipmi_lan_addr); | |
799 | ||
800 | return 0; | |
801 | } | |
c70d7499 | 802 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
803 | |
804 | static void deliver_response(struct ipmi_recv_msg *msg) | |
805 | { | |
8a3628d5 | 806 | if (!msg->user) { |
56a55ec6 | 807 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
808 | |
809 | /* Special handling for NULL users. */ | |
810 | if (intf->null_user_handler) { | |
811 | intf->null_user_handler(intf, msg); | |
b2655f26 | 812 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
813 | } else { |
814 | /* No handler, so give up. */ | |
b2655f26 | 815 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
816 | } |
817 | ipmi_free_recv_msg(msg); | |
c49c0976 HK |
818 | } else if (!oops_in_progress) { |
819 | /* | |
820 | * If we are running in the panic context, calling the | |
821 | * receive handler doesn't much meaning and has a deadlock | |
822 | * risk. At this moment, simply skip it in that case. | |
823 | */ | |
824 | ||
393d2cc3 CM |
825 | ipmi_user_t user = msg->user; |
826 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 827 | } |
1da177e4 LT |
828 | } |
829 | ||
b2c03941 CM |
830 | static void |
831 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
832 | { | |
833 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
834 | msg->msg_data[0] = err; | |
835 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
836 | msg->msg.data_len = 1; | |
837 | msg->msg.data = msg->msg_data; | |
838 | deliver_response(msg); | |
839 | } | |
840 | ||
c70d7499 CM |
841 | /* |
842 | * Find the next sequence number not being used and add the given | |
843 | * message with the given timeout to the sequence table. This must be | |
844 | * called with the interface's seq_lock held. | |
845 | */ | |
1da177e4 LT |
846 | static int intf_next_seq(ipmi_smi_t intf, |
847 | struct ipmi_recv_msg *recv_msg, | |
848 | unsigned long timeout, | |
849 | int retries, | |
850 | int broadcast, | |
851 | unsigned char *seq, | |
852 | long *seqid) | |
853 | { | |
854 | int rv = 0; | |
855 | unsigned int i; | |
856 | ||
c70d7499 CM |
857 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
858 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 859 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
860 | break; |
861 | } | |
862 | ||
8a3628d5 | 863 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
864 | intf->seq_table[i].recv_msg = recv_msg; |
865 | ||
c70d7499 CM |
866 | /* |
867 | * Start with the maximum timeout, when the send response | |
868 | * comes in we will start the real timer. | |
869 | */ | |
1da177e4 LT |
870 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
871 | intf->seq_table[i].orig_timeout = timeout; | |
872 | intf->seq_table[i].retries_left = retries; | |
873 | intf->seq_table[i].broadcast = broadcast; | |
874 | intf->seq_table[i].inuse = 1; | |
875 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
876 | *seq = i; | |
877 | *seqid = intf->seq_table[i].seqid; | |
878 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 879 | need_waiter(intf); |
1da177e4 LT |
880 | } else { |
881 | rv = -EAGAIN; | |
882 | } | |
c70d7499 | 883 | |
1da177e4 LT |
884 | return rv; |
885 | } | |
886 | ||
c70d7499 CM |
887 | /* |
888 | * Return the receive message for the given sequence number and | |
889 | * release the sequence number so it can be reused. Some other data | |
890 | * is passed in to be sure the message matches up correctly (to help | |
891 | * guard against message coming in after their timeout and the | |
892 | * sequence number being reused). | |
893 | */ | |
1da177e4 LT |
894 | static int intf_find_seq(ipmi_smi_t intf, |
895 | unsigned char seq, | |
896 | short channel, | |
897 | unsigned char cmd, | |
898 | unsigned char netfn, | |
899 | struct ipmi_addr *addr, | |
900 | struct ipmi_recv_msg **recv_msg) | |
901 | { | |
902 | int rv = -ENODEV; | |
903 | unsigned long flags; | |
904 | ||
905 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
906 | return -EINVAL; | |
907 | ||
908 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
909 | if (intf->seq_table[seq].inuse) { | |
910 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
911 | ||
c70d7499 CM |
912 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
913 | && (msg->msg.netfn == netfn) | |
914 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
915 | *recv_msg = msg; |
916 | intf->seq_table[seq].inuse = 0; | |
917 | rv = 0; | |
918 | } | |
919 | } | |
920 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
921 | ||
922 | return rv; | |
923 | } | |
924 | ||
925 | ||
926 | /* Start the timer for a specific sequence table entry. */ | |
927 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
928 | long msgid) | |
929 | { | |
930 | int rv = -ENODEV; | |
931 | unsigned long flags; | |
932 | unsigned char seq; | |
933 | unsigned long seqid; | |
934 | ||
935 | ||
936 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
937 | ||
938 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
939 | /* |
940 | * We do this verification because the user can be deleted | |
941 | * while a message is outstanding. | |
942 | */ | |
1da177e4 | 943 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 944 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
945 | struct seq_table *ent = &(intf->seq_table[seq]); |
946 | ent->timeout = ent->orig_timeout; | |
947 | rv = 0; | |
948 | } | |
949 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
950 | ||
951 | return rv; | |
952 | } | |
953 | ||
954 | /* Got an error for the send message for a specific sequence number. */ | |
955 | static int intf_err_seq(ipmi_smi_t intf, | |
956 | long msgid, | |
957 | unsigned int err) | |
958 | { | |
959 | int rv = -ENODEV; | |
960 | unsigned long flags; | |
961 | unsigned char seq; | |
962 | unsigned long seqid; | |
963 | struct ipmi_recv_msg *msg = NULL; | |
964 | ||
965 | ||
966 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
967 | ||
968 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
969 | /* |
970 | * We do this verification because the user can be deleted | |
971 | * while a message is outstanding. | |
972 | */ | |
1da177e4 | 973 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 974 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
975 | struct seq_table *ent = &(intf->seq_table[seq]); |
976 | ||
977 | ent->inuse = 0; | |
978 | msg = ent->recv_msg; | |
979 | rv = 0; | |
980 | } | |
981 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
982 | ||
b2c03941 CM |
983 | if (msg) |
984 | deliver_err_response(msg, err); | |
1da177e4 LT |
985 | |
986 | return rv; | |
987 | } | |
988 | ||
989 | ||
990 | int ipmi_create_user(unsigned int if_num, | |
210af2a5 | 991 | const struct ipmi_user_hndl *handler, |
1da177e4 LT |
992 | void *handler_data, |
993 | ipmi_user_t *user) | |
994 | { | |
995 | unsigned long flags; | |
996 | ipmi_user_t new_user; | |
997 | int rv = 0; | |
998 | ipmi_smi_t intf; | |
999 | ||
c70d7499 CM |
1000 | /* |
1001 | * There is no module usecount here, because it's not | |
1002 | * required. Since this can only be used by and called from | |
1003 | * other modules, they will implicitly use this module, and | |
1004 | * thus this can't be removed unless the other modules are | |
1005 | * removed. | |
1006 | */ | |
1da177e4 LT |
1007 | |
1008 | if (handler == NULL) | |
1009 | return -EINVAL; | |
1010 | ||
c70d7499 CM |
1011 | /* |
1012 | * Make sure the driver is actually initialized, this handles | |
1013 | * problems with initialization order. | |
1014 | */ | |
1da177e4 LT |
1015 | if (!initialized) { |
1016 | rv = ipmi_init_msghandler(); | |
1017 | if (rv) | |
1018 | return rv; | |
1019 | ||
c70d7499 CM |
1020 | /* |
1021 | * The init code doesn't return an error if it was turned | |
1022 | * off, but it won't initialize. Check that. | |
1023 | */ | |
1da177e4 LT |
1024 | if (!initialized) |
1025 | return -ENODEV; | |
1026 | } | |
1027 | ||
1028 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 1029 | if (!new_user) |
1da177e4 LT |
1030 | return -ENOMEM; |
1031 | ||
b2c03941 | 1032 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
1033 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1034 | if (intf->intf_num == if_num) | |
1035 | goto found; | |
1da177e4 | 1036 | } |
b2c03941 | 1037 | /* Not found, return an error */ |
bca0324d CM |
1038 | rv = -EINVAL; |
1039 | goto out_kfree; | |
1da177e4 | 1040 | |
bca0324d | 1041 | found: |
393d2cc3 CM |
1042 | /* Note that each existing user holds a refcount to the interface. */ |
1043 | kref_get(&intf->refcount); | |
1da177e4 | 1044 | |
393d2cc3 | 1045 | kref_init(&new_user->refcount); |
1da177e4 LT |
1046 | new_user->handler = handler; |
1047 | new_user->handler_data = handler_data; | |
1048 | new_user->intf = intf; | |
89986496 | 1049 | new_user->gets_events = false; |
1da177e4 LT |
1050 | |
1051 | if (!try_module_get(intf->handlers->owner)) { | |
1052 | rv = -ENODEV; | |
5c98d29a | 1053 | goto out_kref; |
1da177e4 LT |
1054 | } |
1055 | ||
1056 | if (intf->handlers->inc_usecount) { | |
1057 | rv = intf->handlers->inc_usecount(intf->send_info); | |
1058 | if (rv) { | |
1059 | module_put(intf->handlers->owner); | |
5c98d29a | 1060 | goto out_kref; |
1da177e4 LT |
1061 | } |
1062 | } | |
1063 | ||
c70d7499 CM |
1064 | /* |
1065 | * Hold the lock so intf->handlers is guaranteed to be good | |
1066 | * until now | |
1067 | */ | |
b2c03941 CM |
1068 | mutex_unlock(&ipmi_interfaces_mutex); |
1069 | ||
7aefac26 | 1070 | new_user->valid = true; |
393d2cc3 CM |
1071 | spin_lock_irqsave(&intf->seq_lock, flags); |
1072 | list_add_rcu(&new_user->link, &intf->users); | |
1073 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
1074 | if (handler->ipmi_watchdog_pretimeout) { |
1075 | /* User wants pretimeouts, so make sure to watch for them. */ | |
1076 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1077 | need_waiter(intf); | |
1078 | } | |
393d2cc3 CM |
1079 | *user = new_user; |
1080 | return 0; | |
1da177e4 | 1081 | |
5c98d29a | 1082 | out_kref: |
393d2cc3 | 1083 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 1084 | out_kfree: |
b2c03941 | 1085 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 1086 | kfree(new_user); |
1da177e4 LT |
1087 | return rv; |
1088 | } | |
c70d7499 | 1089 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1090 | |
16f4232c ZY |
1091 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1092 | { | |
1093 | int rv = 0; | |
1094 | ipmi_smi_t intf; | |
81d02b7f | 1095 | const struct ipmi_smi_handlers *handlers; |
16f4232c ZY |
1096 | |
1097 | mutex_lock(&ipmi_interfaces_mutex); | |
1098 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1099 | if (intf->intf_num == if_num) | |
1100 | goto found; | |
1101 | } | |
1102 | /* Not found, return an error */ | |
1103 | rv = -EINVAL; | |
1104 | mutex_unlock(&ipmi_interfaces_mutex); | |
1105 | return rv; | |
1106 | ||
1107 | found: | |
1108 | handlers = intf->handlers; | |
1109 | rv = -ENOSYS; | |
1110 | if (handlers->get_smi_info) | |
1111 | rv = handlers->get_smi_info(intf->send_info, data); | |
1112 | mutex_unlock(&ipmi_interfaces_mutex); | |
1113 | ||
1114 | return rv; | |
1115 | } | |
1116 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1117 | ||
393d2cc3 CM |
1118 | static void free_user(struct kref *ref) |
1119 | { | |
1120 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1121 | kfree(user); | |
1122 | } | |
1123 | ||
1124 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1125 | { |
393d2cc3 | 1126 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1127 | int i; |
1128 | unsigned long flags; | |
393d2cc3 | 1129 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1130 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1131 | |
7aefac26 | 1132 | user->valid = false; |
1da177e4 | 1133 | |
89986496 CM |
1134 | if (user->handler->ipmi_watchdog_pretimeout) |
1135 | atomic_dec(&intf->event_waiters); | |
1136 | ||
1137 | if (user->gets_events) | |
1138 | atomic_dec(&intf->event_waiters); | |
1139 | ||
393d2cc3 CM |
1140 | /* Remove the user from the interface's sequence table. */ |
1141 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1142 | list_del_rcu(&user->link); | |
1da177e4 | 1143 | |
e8b33617 | 1144 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1145 | if (intf->seq_table[i].inuse |
c70d7499 | 1146 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1147 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1148 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1149 | } |
1150 | } | |
393d2cc3 CM |
1151 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1152 | ||
1153 | /* | |
1154 | * Remove the user from the command receiver's table. First | |
1155 | * we build a list of everything (not using the standard link, | |
1156 | * since other things may be using it till we do | |
1157 | * synchronize_rcu()) then free everything in that list. | |
1158 | */ | |
d6dfd131 | 1159 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1160 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1161 | if (rcvr->user == user) { |
393d2cc3 CM |
1162 | list_del_rcu(&rcvr->link); |
1163 | rcvr->next = rcvrs; | |
1164 | rcvrs = rcvr; | |
1da177e4 LT |
1165 | } |
1166 | } | |
d6dfd131 | 1167 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1168 | synchronize_rcu(); |
1169 | while (rcvrs) { | |
1170 | rcvr = rcvrs; | |
1171 | rcvrs = rcvr->next; | |
1172 | kfree(rcvr); | |
1173 | } | |
1da177e4 | 1174 | |
b2c03941 CM |
1175 | mutex_lock(&ipmi_interfaces_mutex); |
1176 | if (intf->handlers) { | |
1177 | module_put(intf->handlers->owner); | |
1178 | if (intf->handlers->dec_usecount) | |
1179 | intf->handlers->dec_usecount(intf->send_info); | |
1180 | } | |
1181 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1182 | |
393d2cc3 | 1183 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1184 | |
393d2cc3 | 1185 | kref_put(&user->refcount, free_user); |
1da177e4 | 1186 | |
8a3628d5 | 1187 | return 0; |
1da177e4 | 1188 | } |
c70d7499 | 1189 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1190 | |
1191 | void ipmi_get_version(ipmi_user_t user, | |
1192 | unsigned char *major, | |
1193 | unsigned char *minor) | |
1194 | { | |
b2c03941 CM |
1195 | *major = user->intf->ipmi_version_major; |
1196 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1197 | } |
c70d7499 | 1198 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1199 | |
c14979b9 CM |
1200 | int ipmi_set_my_address(ipmi_user_t user, |
1201 | unsigned int channel, | |
1202 | unsigned char address) | |
1da177e4 | 1203 | { |
c14979b9 CM |
1204 | if (channel >= IPMI_MAX_CHANNELS) |
1205 | return -EINVAL; | |
1206 | user->intf->channels[channel].address = address; | |
1207 | return 0; | |
1da177e4 | 1208 | } |
c70d7499 | 1209 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1210 | |
c14979b9 CM |
1211 | int ipmi_get_my_address(ipmi_user_t user, |
1212 | unsigned int channel, | |
1213 | unsigned char *address) | |
1da177e4 | 1214 | { |
c14979b9 CM |
1215 | if (channel >= IPMI_MAX_CHANNELS) |
1216 | return -EINVAL; | |
1217 | *address = user->intf->channels[channel].address; | |
1218 | return 0; | |
1da177e4 | 1219 | } |
c70d7499 | 1220 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1221 | |
c14979b9 CM |
1222 | int ipmi_set_my_LUN(ipmi_user_t user, |
1223 | unsigned int channel, | |
1224 | unsigned char LUN) | |
1da177e4 | 1225 | { |
c14979b9 CM |
1226 | if (channel >= IPMI_MAX_CHANNELS) |
1227 | return -EINVAL; | |
1228 | user->intf->channels[channel].lun = LUN & 0x3; | |
1229 | return 0; | |
1da177e4 | 1230 | } |
c70d7499 | 1231 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1232 | |
c14979b9 CM |
1233 | int ipmi_get_my_LUN(ipmi_user_t user, |
1234 | unsigned int channel, | |
1235 | unsigned char *address) | |
1da177e4 | 1236 | { |
c14979b9 CM |
1237 | if (channel >= IPMI_MAX_CHANNELS) |
1238 | return -EINVAL; | |
1239 | *address = user->intf->channels[channel].lun; | |
1240 | return 0; | |
1da177e4 | 1241 | } |
c70d7499 | 1242 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1243 | |
b9675136 CM |
1244 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1245 | { | |
1246 | int mode; | |
1247 | unsigned long flags; | |
1248 | ||
1249 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1250 | mode = user->intf->maintenance_mode; | |
1251 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1252 | ||
1253 | return mode; | |
1254 | } | |
1255 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1256 | ||
1257 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1258 | { | |
1259 | if (intf->handlers->set_maintenance_mode) | |
1260 | intf->handlers->set_maintenance_mode( | |
1261 | intf->send_info, intf->maintenance_mode_enable); | |
1262 | } | |
1263 | ||
1264 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1265 | { | |
1266 | int rv = 0; | |
1267 | unsigned long flags; | |
1268 | ipmi_smi_t intf = user->intf; | |
1269 | ||
1270 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1271 | if (intf->maintenance_mode != mode) { | |
1272 | switch (mode) { | |
1273 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1274 | intf->maintenance_mode_enable |
1275 | = (intf->auto_maintenance_timeout > 0); | |
1276 | break; | |
1277 | ||
1278 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1279 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1280 | break; |
1281 | ||
1282 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1283 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1284 | break; |
1285 | ||
1286 | default: | |
1287 | rv = -EINVAL; | |
1288 | goto out_unlock; | |
1289 | } | |
7aefac26 | 1290 | intf->maintenance_mode = mode; |
b9675136 CM |
1291 | |
1292 | maintenance_mode_update(intf); | |
1293 | } | |
1294 | out_unlock: | |
1295 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1296 | ||
1297 | return rv; | |
1298 | } | |
1299 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1300 | ||
89986496 | 1301 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1302 | { |
393d2cc3 CM |
1303 | unsigned long flags; |
1304 | ipmi_smi_t intf = user->intf; | |
1305 | struct ipmi_recv_msg *msg, *msg2; | |
1306 | struct list_head msgs; | |
1da177e4 | 1307 | |
393d2cc3 CM |
1308 | INIT_LIST_HEAD(&msgs); |
1309 | ||
1310 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1311 | if (user->gets_events == val) |
1312 | goto out; | |
1313 | ||
1da177e4 LT |
1314 | user->gets_events = val; |
1315 | ||
89986496 CM |
1316 | if (val) { |
1317 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1318 | need_waiter(intf); | |
1319 | } else { | |
1320 | atomic_dec(&intf->event_waiters); | |
1321 | } | |
1322 | ||
b2c03941 CM |
1323 | if (intf->delivering_events) |
1324 | /* | |
1325 | * Another thread is delivering events for this, so | |
1326 | * let it handle any new events. | |
1327 | */ | |
1328 | goto out; | |
1329 | ||
1330 | /* Deliver any queued events. */ | |
1331 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1332 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1333 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1334 | intf->waiting_events_count = 0; |
87ebd06f CM |
1335 | if (intf->event_msg_printed) { |
1336 | printk(KERN_WARNING PFX "Event queue no longer" | |
1337 | " full\n"); | |
1338 | intf->event_msg_printed = 0; | |
1339 | } | |
393d2cc3 | 1340 | |
b2c03941 CM |
1341 | intf->delivering_events = 1; |
1342 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1343 | ||
1344 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1345 | msg->user = user; | |
1346 | kref_get(&user->refcount); | |
1347 | deliver_response(msg); | |
1348 | } | |
1349 | ||
1350 | spin_lock_irqsave(&intf->events_lock, flags); | |
1351 | intf->delivering_events = 0; | |
393d2cc3 CM |
1352 | } |
1353 | ||
b2c03941 | 1354 | out: |
393d2cc3 | 1355 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1356 | |
1357 | return 0; | |
1358 | } | |
c70d7499 | 1359 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1360 | |
393d2cc3 CM |
1361 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1362 | unsigned char netfn, | |
c69c3127 CM |
1363 | unsigned char cmd, |
1364 | unsigned char chan) | |
393d2cc3 CM |
1365 | { |
1366 | struct cmd_rcvr *rcvr; | |
1367 | ||
1368 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1369 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1370 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1371 | return rcvr; |
1372 | } | |
1373 | return NULL; | |
1374 | } | |
1375 | ||
c69c3127 CM |
1376 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1377 | unsigned char netfn, | |
1378 | unsigned char cmd, | |
1379 | unsigned int chans) | |
1380 | { | |
1381 | struct cmd_rcvr *rcvr; | |
1382 | ||
1383 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1384 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1385 | && (rcvr->chans & chans)) | |
1386 | return 0; | |
1387 | } | |
1388 | return 1; | |
1389 | } | |
1390 | ||
1da177e4 LT |
1391 | int ipmi_register_for_cmd(ipmi_user_t user, |
1392 | unsigned char netfn, | |
c69c3127 CM |
1393 | unsigned char cmd, |
1394 | unsigned int chans) | |
1da177e4 | 1395 | { |
393d2cc3 CM |
1396 | ipmi_smi_t intf = user->intf; |
1397 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1398 | int rv = 0; |
1da177e4 LT |
1399 | |
1400 | ||
1401 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1402 | if (!rcvr) |
1da177e4 | 1403 | return -ENOMEM; |
393d2cc3 CM |
1404 | rcvr->cmd = cmd; |
1405 | rcvr->netfn = netfn; | |
c69c3127 | 1406 | rcvr->chans = chans; |
393d2cc3 | 1407 | rcvr->user = user; |
1da177e4 | 1408 | |
d6dfd131 | 1409 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1410 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1411 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1412 | rv = -EBUSY; |
1413 | goto out_unlock; | |
1da177e4 | 1414 | } |
877197ef | 1415 | |
89986496 CM |
1416 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1417 | need_waiter(intf); | |
1418 | ||
393d2cc3 | 1419 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1420 | |
393d2cc3 | 1421 | out_unlock: |
d6dfd131 | 1422 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1423 | if (rv) |
1424 | kfree(rcvr); | |
1425 | ||
1426 | return rv; | |
1427 | } | |
c70d7499 | 1428 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1429 | |
1430 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1431 | unsigned char netfn, | |
c69c3127 CM |
1432 | unsigned char cmd, |
1433 | unsigned int chans) | |
1da177e4 | 1434 | { |
393d2cc3 CM |
1435 | ipmi_smi_t intf = user->intf; |
1436 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1437 | struct cmd_rcvr *rcvrs = NULL; |
1438 | int i, rv = -ENOENT; | |
1da177e4 | 1439 | |
d6dfd131 | 1440 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1441 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1442 | if (((1 << i) & chans) == 0) | |
1443 | continue; | |
1444 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1445 | if (rcvr == NULL) | |
1446 | continue; | |
1447 | if (rcvr->user == user) { | |
1448 | rv = 0; | |
1449 | rcvr->chans &= ~chans; | |
1450 | if (rcvr->chans == 0) { | |
1451 | list_del_rcu(&rcvr->link); | |
1452 | rcvr->next = rcvrs; | |
1453 | rcvrs = rcvr; | |
1454 | } | |
1455 | } | |
1456 | } | |
1457 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1458 | synchronize_rcu(); | |
1459 | while (rcvrs) { | |
89986496 | 1460 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1461 | rcvr = rcvrs; |
1462 | rcvrs = rcvr->next; | |
393d2cc3 | 1463 | kfree(rcvr); |
1da177e4 | 1464 | } |
c69c3127 | 1465 | return rv; |
1da177e4 | 1466 | } |
c70d7499 | 1467 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1468 | |
1da177e4 LT |
1469 | static unsigned char |
1470 | ipmb_checksum(unsigned char *data, int size) | |
1471 | { | |
1472 | unsigned char csum = 0; | |
c70d7499 | 1473 | |
1da177e4 LT |
1474 | for (; size > 0; size--, data++) |
1475 | csum += *data; | |
1476 | ||
1477 | return -csum; | |
1478 | } | |
1479 | ||
1480 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1481 | struct kernel_ipmi_msg *msg, | |
1482 | struct ipmi_ipmb_addr *ipmb_addr, | |
1483 | long msgid, | |
1484 | unsigned char ipmb_seq, | |
1485 | int broadcast, | |
1486 | unsigned char source_address, | |
1487 | unsigned char source_lun) | |
1488 | { | |
1489 | int i = broadcast; | |
1490 | ||
1491 | /* Format the IPMB header data. */ | |
1492 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1493 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1494 | smi_msg->data[2] = ipmb_addr->channel; | |
1495 | if (broadcast) | |
1496 | smi_msg->data[3] = 0; | |
1497 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1498 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1499 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1500 | smi_msg->data[i+6] = source_address; | |
1501 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1502 | smi_msg->data[i+8] = msg->cmd; | |
1503 | ||
1504 | /* Now tack on the data to the message. */ | |
1505 | if (msg->data_len > 0) | |
1506 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1507 | msg->data_len); | |
1508 | smi_msg->data_size = msg->data_len + 9; | |
1509 | ||
1510 | /* Now calculate the checksum and tack it on. */ | |
1511 | smi_msg->data[i+smi_msg->data_size] | |
1512 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1513 | smi_msg->data_size-6); | |
1514 | ||
c70d7499 CM |
1515 | /* |
1516 | * Add on the checksum size and the offset from the | |
1517 | * broadcast. | |
1518 | */ | |
1da177e4 LT |
1519 | smi_msg->data_size += 1 + i; |
1520 | ||
1521 | smi_msg->msgid = msgid; | |
1522 | } | |
1523 | ||
1524 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1525 | struct kernel_ipmi_msg *msg, | |
1526 | struct ipmi_lan_addr *lan_addr, | |
1527 | long msgid, | |
1528 | unsigned char ipmb_seq, | |
1529 | unsigned char source_lun) | |
1530 | { | |
1531 | /* Format the IPMB header data. */ | |
1532 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1533 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1534 | smi_msg->data[2] = lan_addr->channel; | |
1535 | smi_msg->data[3] = lan_addr->session_handle; | |
1536 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1537 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1538 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1539 | smi_msg->data[7] = lan_addr->local_SWID; | |
1540 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1541 | smi_msg->data[9] = msg->cmd; | |
1542 | ||
1543 | /* Now tack on the data to the message. */ | |
1544 | if (msg->data_len > 0) | |
1545 | memcpy(&(smi_msg->data[10]), msg->data, | |
1546 | msg->data_len); | |
1547 | smi_msg->data_size = msg->data_len + 10; | |
1548 | ||
1549 | /* Now calculate the checksum and tack it on. */ | |
1550 | smi_msg->data[smi_msg->data_size] | |
1551 | = ipmb_checksum(&(smi_msg->data[7]), | |
1552 | smi_msg->data_size-7); | |
1553 | ||
c70d7499 CM |
1554 | /* |
1555 | * Add on the checksum size and the offset from the | |
1556 | * broadcast. | |
1557 | */ | |
1da177e4 LT |
1558 | smi_msg->data_size += 1; |
1559 | ||
1560 | smi_msg->msgid = msgid; | |
1561 | } | |
1562 | ||
191cc414 AB |
1563 | static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf, |
1564 | struct ipmi_smi_msg *smi_msg, | |
1565 | int priority) | |
7f4a1c84 | 1566 | { |
7ea0ed2b CM |
1567 | if (intf->curr_msg) { |
1568 | if (priority > 0) | |
1569 | list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs); | |
1570 | else | |
1571 | list_add_tail(&smi_msg->link, &intf->xmit_msgs); | |
1572 | smi_msg = NULL; | |
1573 | } else { | |
1574 | intf->curr_msg = smi_msg; | |
1575 | } | |
191cc414 AB |
1576 | |
1577 | return smi_msg; | |
1578 | } | |
1579 | ||
1580 | ||
81d02b7f | 1581 | static void smi_send(ipmi_smi_t intf, const struct ipmi_smi_handlers *handlers, |
191cc414 AB |
1582 | struct ipmi_smi_msg *smi_msg, int priority) |
1583 | { | |
1584 | int run_to_completion = intf->run_to_completion; | |
1585 | ||
1586 | if (run_to_completion) { | |
1587 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
1588 | } else { | |
1589 | unsigned long flags; | |
1590 | ||
1591 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
1592 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
7ea0ed2b | 1593 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
191cc414 | 1594 | } |
7ea0ed2b CM |
1595 | |
1596 | if (smi_msg) | |
99ab32f3 | 1597 | handlers->sender(intf->send_info, smi_msg); |
7f4a1c84 CM |
1598 | } |
1599 | ||
c70d7499 CM |
1600 | /* |
1601 | * Separate from ipmi_request so that the user does not have to be | |
1602 | * supplied in certain circumstances (mainly at panic time). If | |
1603 | * messages are supplied, they will be freed, even if an error | |
1604 | * occurs. | |
1605 | */ | |
393d2cc3 CM |
1606 | static int i_ipmi_request(ipmi_user_t user, |
1607 | ipmi_smi_t intf, | |
1608 | struct ipmi_addr *addr, | |
1609 | long msgid, | |
1610 | struct kernel_ipmi_msg *msg, | |
1611 | void *user_msg_data, | |
1612 | void *supplied_smi, | |
1613 | struct ipmi_recv_msg *supplied_recv, | |
1614 | int priority, | |
1615 | unsigned char source_address, | |
1616 | unsigned char source_lun, | |
1617 | int retries, | |
1618 | unsigned int retry_time_ms) | |
1da177e4 | 1619 | { |
b2c03941 CM |
1620 | int rv = 0; |
1621 | struct ipmi_smi_msg *smi_msg; | |
1622 | struct ipmi_recv_msg *recv_msg; | |
1623 | unsigned long flags; | |
1da177e4 LT |
1624 | |
1625 | ||
c70d7499 | 1626 | if (supplied_recv) |
1da177e4 | 1627 | recv_msg = supplied_recv; |
c70d7499 | 1628 | else { |
1da177e4 | 1629 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1630 | if (recv_msg == NULL) |
1da177e4 | 1631 | return -ENOMEM; |
1da177e4 LT |
1632 | } |
1633 | recv_msg->user_msg_data = user_msg_data; | |
1634 | ||
c70d7499 | 1635 | if (supplied_smi) |
1da177e4 | 1636 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1637 | else { |
1da177e4 LT |
1638 | smi_msg = ipmi_alloc_smi_msg(); |
1639 | if (smi_msg == NULL) { | |
1640 | ipmi_free_recv_msg(recv_msg); | |
1641 | return -ENOMEM; | |
1642 | } | |
1643 | } | |
1644 | ||
b2c03941 | 1645 | rcu_read_lock(); |
7ea0ed2b | 1646 | if (intf->in_shutdown) { |
b2c03941 CM |
1647 | rv = -ENODEV; |
1648 | goto out_err; | |
1649 | } | |
1650 | ||
1da177e4 | 1651 | recv_msg->user = user; |
393d2cc3 CM |
1652 | if (user) |
1653 | kref_get(&user->refcount); | |
1da177e4 | 1654 | recv_msg->msgid = msgid; |
c70d7499 CM |
1655 | /* |
1656 | * Store the message to send in the receive message so timeout | |
1657 | * responses can get the proper response data. | |
1658 | */ | |
1da177e4 LT |
1659 | recv_msg->msg = *msg; |
1660 | ||
1661 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1662 | struct ipmi_system_interface_addr *smi_addr; | |
1663 | ||
1664 | if (msg->netfn & 1) { | |
1665 | /* Responses are not allowed to the SMI. */ | |
1666 | rv = -EINVAL; | |
1667 | goto out_err; | |
1668 | } | |
1669 | ||
1670 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1671 | if (smi_addr->lun > 3) { | |
b2655f26 | 1672 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1673 | rv = -EINVAL; |
1674 | goto out_err; | |
1675 | } | |
1676 | ||
1677 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1678 | ||
1679 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1680 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1681 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1682 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1683 | /* | |
1684 | * We don't let the user do these, since we manage | |
1685 | * the sequence numbers. | |
1686 | */ | |
b2655f26 | 1687 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1688 | rv = -EINVAL; |
1689 | goto out_err; | |
1690 | } | |
1691 | ||
b9675136 CM |
1692 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1693 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1694 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1695 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1696 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1697 | intf->auto_maintenance_timeout | |
1698 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1699 | if (!intf->maintenance_mode | |
c70d7499 | 1700 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1701 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1702 | maintenance_mode_update(intf); |
1703 | } | |
1704 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1705 | flags); | |
1706 | } | |
1707 | ||
1da177e4 | 1708 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1709 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1710 | rv = -EMSGSIZE; |
1711 | goto out_err; | |
1712 | } | |
1713 | ||
1714 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1715 | smi_msg->data[1] = msg->cmd; | |
1716 | smi_msg->msgid = msgid; | |
1717 | smi_msg->user_data = recv_msg; | |
1718 | if (msg->data_len > 0) | |
1719 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1720 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1721 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1722 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1723 | struct ipmi_ipmb_addr *ipmb_addr; |
1724 | unsigned char ipmb_seq; | |
1725 | long seqid; | |
1726 | int broadcast = 0; | |
1727 | ||
9c101fd4 | 1728 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1729 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1730 | rv = -EINVAL; |
1731 | goto out_err; | |
1732 | } | |
1733 | ||
1734 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1735 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1736 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1737 | rv = -EINVAL; |
1738 | goto out_err; | |
1739 | } | |
1740 | ||
1741 | if (retries < 0) { | |
1742 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1743 | retries = 0; /* Don't retry broadcasts. */ | |
1744 | else | |
1745 | retries = 4; | |
1746 | } | |
1747 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1748 | /* |
1749 | * Broadcasts add a zero at the beginning of the | |
1750 | * message, but otherwise is the same as an IPMB | |
1751 | * address. | |
1752 | */ | |
1da177e4 LT |
1753 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1754 | broadcast = 1; | |
1755 | } | |
1756 | ||
1757 | ||
1758 | /* Default to 1 second retries. */ | |
1759 | if (retry_time_ms == 0) | |
1760 | retry_time_ms = 1000; | |
1761 | ||
c70d7499 CM |
1762 | /* |
1763 | * 9 for the header and 1 for the checksum, plus | |
1764 | * possibly one for the broadcast. | |
1765 | */ | |
1da177e4 | 1766 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1767 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1768 | rv = -EMSGSIZE; |
1769 | goto out_err; | |
1770 | } | |
1771 | ||
1772 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1773 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1774 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1775 | rv = -EINVAL; |
1776 | goto out_err; | |
1777 | } | |
1778 | ||
1779 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1780 | ||
1781 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1782 | /* |
1783 | * It's a response, so use the user's sequence | |
1784 | * from msgid. | |
1785 | */ | |
b2655f26 | 1786 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1787 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1788 | msgid, broadcast, | |
1789 | source_address, source_lun); | |
1790 | ||
c70d7499 CM |
1791 | /* |
1792 | * Save the receive message so we can use it | |
1793 | * to deliver the response. | |
1794 | */ | |
1da177e4 LT |
1795 | smi_msg->user_data = recv_msg; |
1796 | } else { | |
1797 | /* It's a command, so get a sequence for it. */ | |
1798 | ||
1799 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1800 | ||
c70d7499 CM |
1801 | /* |
1802 | * Create a sequence number with a 1 second | |
1803 | * timeout and 4 retries. | |
1804 | */ | |
1da177e4 LT |
1805 | rv = intf_next_seq(intf, |
1806 | recv_msg, | |
1807 | retry_time_ms, | |
1808 | retries, | |
1809 | broadcast, | |
1810 | &ipmb_seq, | |
1811 | &seqid); | |
1812 | if (rv) { | |
c70d7499 CM |
1813 | /* |
1814 | * We have used up all the sequence numbers, | |
1815 | * probably, so abort. | |
1816 | */ | |
1da177e4 LT |
1817 | spin_unlock_irqrestore(&(intf->seq_lock), |
1818 | flags); | |
1819 | goto out_err; | |
1820 | } | |
1821 | ||
25176ed6 CM |
1822 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1823 | ||
c70d7499 CM |
1824 | /* |
1825 | * Store the sequence number in the message, | |
1826 | * so that when the send message response | |
1827 | * comes back we can start the timer. | |
1828 | */ | |
1da177e4 LT |
1829 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1830 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1831 | ipmb_seq, broadcast, | |
1832 | source_address, source_lun); | |
1833 | ||
c70d7499 CM |
1834 | /* |
1835 | * Copy the message into the recv message data, so we | |
1836 | * can retransmit it later if necessary. | |
1837 | */ | |
1da177e4 LT |
1838 | memcpy(recv_msg->msg_data, smi_msg->data, |
1839 | smi_msg->data_size); | |
1840 | recv_msg->msg.data = recv_msg->msg_data; | |
1841 | recv_msg->msg.data_len = smi_msg->data_size; | |
1842 | ||
c70d7499 CM |
1843 | /* |
1844 | * We don't unlock until here, because we need | |
1845 | * to copy the completed message into the | |
1846 | * recv_msg before we release the lock. | |
1847 | * Otherwise, race conditions may bite us. I | |
1848 | * know that's pretty paranoid, but I prefer | |
1849 | * to be correct. | |
1850 | */ | |
1da177e4 LT |
1851 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1852 | } | |
25176ed6 | 1853 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1854 | struct ipmi_lan_addr *lan_addr; |
1855 | unsigned char ipmb_seq; | |
1856 | long seqid; | |
1857 | ||
12fc1d7b | 1858 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1859 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1860 | rv = -EINVAL; |
1861 | goto out_err; | |
1862 | } | |
1863 | ||
1864 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1865 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1866 | && (intf->channels[addr->channel].medium |
c70d7499 | 1867 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1868 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1869 | rv = -EINVAL; |
1870 | goto out_err; | |
1871 | } | |
1872 | ||
1873 | retries = 4; | |
1874 | ||
1875 | /* Default to 1 second retries. */ | |
1876 | if (retry_time_ms == 0) | |
1877 | retry_time_ms = 1000; | |
1878 | ||
1879 | /* 11 for the header and 1 for the checksum. */ | |
1880 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1881 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1882 | rv = -EMSGSIZE; |
1883 | goto out_err; | |
1884 | } | |
1885 | ||
1886 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1887 | if (lan_addr->lun > 3) { | |
b2655f26 | 1888 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1889 | rv = -EINVAL; |
1890 | goto out_err; | |
1891 | } | |
1892 | ||
1893 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1894 | ||
1895 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1896 | /* |
1897 | * It's a response, so use the user's sequence | |
1898 | * from msgid. | |
1899 | */ | |
b2655f26 | 1900 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1901 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1902 | msgid, source_lun); | |
1903 | ||
c70d7499 CM |
1904 | /* |
1905 | * Save the receive message so we can use it | |
1906 | * to deliver the response. | |
1907 | */ | |
1da177e4 LT |
1908 | smi_msg->user_data = recv_msg; |
1909 | } else { | |
1910 | /* It's a command, so get a sequence for it. */ | |
1911 | ||
1912 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1913 | ||
c70d7499 CM |
1914 | /* |
1915 | * Create a sequence number with a 1 second | |
1916 | * timeout and 4 retries. | |
1917 | */ | |
1da177e4 LT |
1918 | rv = intf_next_seq(intf, |
1919 | recv_msg, | |
1920 | retry_time_ms, | |
1921 | retries, | |
1922 | 0, | |
1923 | &ipmb_seq, | |
1924 | &seqid); | |
1925 | if (rv) { | |
c70d7499 CM |
1926 | /* |
1927 | * We have used up all the sequence numbers, | |
1928 | * probably, so abort. | |
1929 | */ | |
1da177e4 LT |
1930 | spin_unlock_irqrestore(&(intf->seq_lock), |
1931 | flags); | |
1932 | goto out_err; | |
1933 | } | |
1934 | ||
25176ed6 CM |
1935 | ipmi_inc_stat(intf, sent_lan_commands); |
1936 | ||
c70d7499 CM |
1937 | /* |
1938 | * Store the sequence number in the message, | |
1939 | * so that when the send message response | |
1940 | * comes back we can start the timer. | |
1941 | */ | |
1da177e4 LT |
1942 | format_lan_msg(smi_msg, msg, lan_addr, |
1943 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1944 | ipmb_seq, source_lun); | |
1945 | ||
c70d7499 CM |
1946 | /* |
1947 | * Copy the message into the recv message data, so we | |
1948 | * can retransmit it later if necessary. | |
1949 | */ | |
1da177e4 LT |
1950 | memcpy(recv_msg->msg_data, smi_msg->data, |
1951 | smi_msg->data_size); | |
1952 | recv_msg->msg.data = recv_msg->msg_data; | |
1953 | recv_msg->msg.data_len = smi_msg->data_size; | |
1954 | ||
c70d7499 CM |
1955 | /* |
1956 | * We don't unlock until here, because we need | |
1957 | * to copy the completed message into the | |
1958 | * recv_msg before we release the lock. | |
1959 | * Otherwise, race conditions may bite us. I | |
1960 | * know that's pretty paranoid, but I prefer | |
1961 | * to be correct. | |
1962 | */ | |
1da177e4 LT |
1963 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1964 | } | |
1965 | } else { | |
1966 | /* Unknown address type. */ | |
b2655f26 | 1967 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1968 | rv = -EINVAL; |
1969 | goto out_err; | |
1970 | } | |
1971 | ||
1972 | #ifdef DEBUG_MSGING | |
1973 | { | |
1974 | int m; | |
e8b33617 | 1975 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1976 | printk(" %2.2x", smi_msg->data[m]); |
1977 | printk("\n"); | |
1978 | } | |
1979 | #endif | |
b2c03941 | 1980 | |
7ea0ed2b | 1981 | smi_send(intf, intf->handlers, smi_msg, priority); |
b2c03941 | 1982 | rcu_read_unlock(); |
1da177e4 LT |
1983 | |
1984 | return 0; | |
1985 | ||
1986 | out_err: | |
b2c03941 | 1987 | rcu_read_unlock(); |
1da177e4 LT |
1988 | ipmi_free_smi_msg(smi_msg); |
1989 | ipmi_free_recv_msg(recv_msg); | |
1990 | return rv; | |
1991 | } | |
1992 | ||
c14979b9 CM |
1993 | static int check_addr(ipmi_smi_t intf, |
1994 | struct ipmi_addr *addr, | |
1995 | unsigned char *saddr, | |
1996 | unsigned char *lun) | |
1997 | { | |
1998 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1999 | return -EINVAL; | |
2000 | *lun = intf->channels[addr->channel].lun; | |
2001 | *saddr = intf->channels[addr->channel].address; | |
2002 | return 0; | |
2003 | } | |
2004 | ||
1da177e4 LT |
2005 | int ipmi_request_settime(ipmi_user_t user, |
2006 | struct ipmi_addr *addr, | |
2007 | long msgid, | |
2008 | struct kernel_ipmi_msg *msg, | |
2009 | void *user_msg_data, | |
2010 | int priority, | |
2011 | int retries, | |
2012 | unsigned int retry_time_ms) | |
2013 | { | |
f0ba9390 | 2014 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2015 | int rv; |
2016 | ||
8a3628d5 | 2017 | if (!user) |
56a55ec6 | 2018 | return -EINVAL; |
c14979b9 CM |
2019 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2020 | if (rv) | |
2021 | return rv; | |
1da177e4 LT |
2022 | return i_ipmi_request(user, |
2023 | user->intf, | |
2024 | addr, | |
2025 | msgid, | |
2026 | msg, | |
2027 | user_msg_data, | |
2028 | NULL, NULL, | |
2029 | priority, | |
c14979b9 CM |
2030 | saddr, |
2031 | lun, | |
1da177e4 LT |
2032 | retries, |
2033 | retry_time_ms); | |
2034 | } | |
c70d7499 | 2035 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
2036 | |
2037 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
2038 | struct ipmi_addr *addr, | |
2039 | long msgid, | |
2040 | struct kernel_ipmi_msg *msg, | |
2041 | void *user_msg_data, | |
2042 | void *supplied_smi, | |
2043 | struct ipmi_recv_msg *supplied_recv, | |
2044 | int priority) | |
2045 | { | |
9ebca93b | 2046 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2047 | int rv; |
2048 | ||
8a3628d5 | 2049 | if (!user) |
56a55ec6 | 2050 | return -EINVAL; |
c14979b9 CM |
2051 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2052 | if (rv) | |
2053 | return rv; | |
1da177e4 LT |
2054 | return i_ipmi_request(user, |
2055 | user->intf, | |
2056 | addr, | |
2057 | msgid, | |
2058 | msg, | |
2059 | user_msg_data, | |
2060 | supplied_smi, | |
2061 | supplied_recv, | |
2062 | priority, | |
c14979b9 CM |
2063 | saddr, |
2064 | lun, | |
1da177e4 LT |
2065 | -1, 0); |
2066 | } | |
c70d7499 | 2067 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 2068 | |
1aa16eea | 2069 | #ifdef CONFIG_PROC_FS |
07412736 | 2070 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2071 | { |
07412736 | 2072 | ipmi_smi_t intf = m->private; |
c14979b9 | 2073 | int i; |
1da177e4 | 2074 | |
07412736 AD |
2075 | seq_printf(m, "%x", intf->channels[0].address); |
2076 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) | |
2077 | seq_printf(m, " %x", intf->channels[i].address); | |
d6c5dc18 JP |
2078 | seq_putc(m, '\n'); |
2079 | ||
5e33cd0c | 2080 | return 0; |
1da177e4 LT |
2081 | } |
2082 | ||
07412736 | 2083 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2084 | { |
d9dda78b | 2085 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 2086 | } |
1da177e4 | 2087 | |
07412736 AD |
2088 | static const struct file_operations smi_ipmb_proc_ops = { |
2089 | .open = smi_ipmb_proc_open, | |
2090 | .read = seq_read, | |
2091 | .llseek = seq_lseek, | |
2092 | .release = single_release, | |
2093 | }; | |
2094 | ||
2095 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
2096 | { | |
2097 | ipmi_smi_t intf = m->private; | |
2098 | ||
d6c5dc18 JP |
2099 | seq_printf(m, "%u.%u\n", |
2100 | ipmi_version_major(&intf->bmc->id), | |
2101 | ipmi_version_minor(&intf->bmc->id)); | |
2102 | ||
5e33cd0c | 2103 | return 0; |
1da177e4 LT |
2104 | } |
2105 | ||
07412736 | 2106 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2107 | { |
d9dda78b | 2108 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
2109 | } |
2110 | ||
2111 | static const struct file_operations smi_version_proc_ops = { | |
2112 | .open = smi_version_proc_open, | |
2113 | .read = seq_read, | |
2114 | .llseek = seq_lseek, | |
2115 | .release = single_release, | |
2116 | }; | |
1da177e4 | 2117 | |
07412736 AD |
2118 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
2119 | { | |
2120 | ipmi_smi_t intf = m->private; | |
2121 | ||
2122 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 2123 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 2124 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 2125 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2126 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2127 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2128 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2129 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2130 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2131 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2132 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2133 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2134 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2135 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2136 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2137 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2138 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2139 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2140 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2141 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2142 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2143 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2144 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2145 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2146 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2147 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2148 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2149 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2150 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2151 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2152 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2153 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2154 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2155 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2156 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2157 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2158 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2159 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2160 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2161 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2162 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2163 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2164 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2165 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2166 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2167 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2168 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2169 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2170 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2171 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2172 | seq_printf(m, "events: %u\n", |
b2655f26 | 2173 | ipmi_get_stat(intf, events)); |
07412736 | 2174 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2175 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2176 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2177 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2178 | return 0; |
2179 | } | |
1da177e4 | 2180 | |
07412736 AD |
2181 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2182 | { | |
d9dda78b | 2183 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2184 | } |
07412736 AD |
2185 | |
2186 | static const struct file_operations smi_stats_proc_ops = { | |
2187 | .open = smi_stats_proc_open, | |
2188 | .read = seq_read, | |
2189 | .llseek = seq_lseek, | |
2190 | .release = single_release, | |
2191 | }; | |
1aa16eea | 2192 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2193 | |
2194 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2195 | const struct file_operations *proc_ops, |
99b76233 | 2196 | void *data) |
1da177e4 | 2197 | { |
1da177e4 | 2198 | int rv = 0; |
3b625943 CM |
2199 | #ifdef CONFIG_PROC_FS |
2200 | struct proc_dir_entry *file; | |
1da177e4 LT |
2201 | struct ipmi_proc_entry *entry; |
2202 | ||
2203 | /* Create a list element. */ | |
2204 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2205 | if (!entry) | |
2206 | return -ENOMEM; | |
1b6b698f | 2207 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2208 | if (!entry->name) { |
2209 | kfree(entry); | |
2210 | return -ENOMEM; | |
2211 | } | |
1da177e4 | 2212 | |
07412736 | 2213 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2214 | if (!file) { |
2215 | kfree(entry->name); | |
2216 | kfree(entry); | |
2217 | rv = -ENOMEM; | |
2218 | } else { | |
ac019151 | 2219 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2220 | /* Stick it on the list. */ |
2221 | entry->next = smi->proc_entries; | |
2222 | smi->proc_entries = entry; | |
ac019151 | 2223 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2224 | } |
3b625943 | 2225 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2226 | |
2227 | return rv; | |
2228 | } | |
c70d7499 | 2229 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2230 | |
2231 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2232 | { | |
2233 | int rv = 0; | |
2234 | ||
3b625943 | 2235 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2236 | sprintf(smi->proc_dir_name, "%d", num); |
2237 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2238 | if (!smi->proc_dir) | |
2239 | rv = -ENOMEM; | |
1da177e4 LT |
2240 | |
2241 | if (rv == 0) | |
2242 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2243 | &smi_stats_proc_ops, |
99b76233 | 2244 | smi); |
1da177e4 LT |
2245 | |
2246 | if (rv == 0) | |
2247 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2248 | &smi_ipmb_proc_ops, |
99b76233 | 2249 | smi); |
1da177e4 LT |
2250 | |
2251 | if (rv == 0) | |
2252 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2253 | &smi_version_proc_ops, |
99b76233 | 2254 | smi); |
3b625943 | 2255 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2256 | |
2257 | return rv; | |
2258 | } | |
2259 | ||
2260 | static void remove_proc_entries(ipmi_smi_t smi) | |
2261 | { | |
3b625943 | 2262 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2263 | struct ipmi_proc_entry *entry; |
2264 | ||
ac019151 | 2265 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2266 | while (smi->proc_entries) { |
2267 | entry = smi->proc_entries; | |
2268 | smi->proc_entries = entry->next; | |
2269 | ||
2270 | remove_proc_entry(entry->name, smi->proc_dir); | |
2271 | kfree(entry->name); | |
2272 | kfree(entry); | |
2273 | } | |
ac019151 | 2274 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2275 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2276 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2277 | } |
2278 | ||
50c812b2 CM |
2279 | static ssize_t device_id_show(struct device *dev, |
2280 | struct device_attribute *attr, | |
2281 | char *buf) | |
2282 | { | |
16639eb0 | 2283 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2284 | |
2285 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2286 | } | |
9c633317 | 2287 | static DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL); |
50c812b2 | 2288 | |
16639eb0 CM |
2289 | static ssize_t provides_device_sdrs_show(struct device *dev, |
2290 | struct device_attribute *attr, | |
2291 | char *buf) | |
50c812b2 | 2292 | { |
16639eb0 | 2293 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2294 | |
2295 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2296 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 | 2297 | } |
9c633317 CM |
2298 | static DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, |
2299 | NULL); | |
50c812b2 CM |
2300 | |
2301 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2302 | char *buf) | |
2303 | { | |
16639eb0 | 2304 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2305 | |
2306 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2307 | bmc->id.device_revision & 0x0F); |
50c812b2 | 2308 | } |
9c633317 | 2309 | static DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL); |
50c812b2 | 2310 | |
16639eb0 CM |
2311 | static ssize_t firmware_revision_show(struct device *dev, |
2312 | struct device_attribute *attr, | |
2313 | char *buf) | |
50c812b2 | 2314 | { |
16639eb0 | 2315 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2316 | |
2317 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2318 | bmc->id.firmware_revision_2); | |
2319 | } | |
9c633317 | 2320 | static DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL); |
50c812b2 CM |
2321 | |
2322 | static ssize_t ipmi_version_show(struct device *dev, | |
2323 | struct device_attribute *attr, | |
2324 | char *buf) | |
2325 | { | |
16639eb0 | 2326 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2327 | |
2328 | return snprintf(buf, 20, "%u.%u\n", | |
2329 | ipmi_version_major(&bmc->id), | |
2330 | ipmi_version_minor(&bmc->id)); | |
2331 | } | |
9c633317 | 2332 | static DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL); |
50c812b2 CM |
2333 | |
2334 | static ssize_t add_dev_support_show(struct device *dev, | |
2335 | struct device_attribute *attr, | |
2336 | char *buf) | |
2337 | { | |
16639eb0 | 2338 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2339 | |
2340 | return snprintf(buf, 10, "0x%02x\n", | |
2341 | bmc->id.additional_device_support); | |
2342 | } | |
9c633317 CM |
2343 | static DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, |
2344 | NULL); | |
50c812b2 CM |
2345 | |
2346 | static ssize_t manufacturer_id_show(struct device *dev, | |
2347 | struct device_attribute *attr, | |
2348 | char *buf) | |
2349 | { | |
16639eb0 | 2350 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2351 | |
2352 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2353 | } | |
9c633317 | 2354 | static DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL); |
50c812b2 CM |
2355 | |
2356 | static ssize_t product_id_show(struct device *dev, | |
2357 | struct device_attribute *attr, | |
2358 | char *buf) | |
2359 | { | |
16639eb0 | 2360 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2361 | |
2362 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2363 | } | |
9c633317 | 2364 | static DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL); |
50c812b2 CM |
2365 | |
2366 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2367 | struct device_attribute *attr, | |
2368 | char *buf) | |
2369 | { | |
16639eb0 | 2370 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2371 | |
2372 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2373 | bmc->id.aux_firmware_revision[3], | |
2374 | bmc->id.aux_firmware_revision[2], | |
2375 | bmc->id.aux_firmware_revision[1], | |
2376 | bmc->id.aux_firmware_revision[0]); | |
2377 | } | |
9c633317 | 2378 | static DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL); |
50c812b2 CM |
2379 | |
2380 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2381 | char *buf) | |
2382 | { | |
16639eb0 | 2383 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2384 | |
2385 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2386 | (long long) bmc->guid[0], | |
2387 | (long long) bmc->guid[8]); | |
2388 | } | |
9c633317 | 2389 | static DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL); |
16639eb0 CM |
2390 | |
2391 | static struct attribute *bmc_dev_attrs[] = { | |
2392 | &dev_attr_device_id.attr, | |
2393 | &dev_attr_provides_device_sdrs.attr, | |
2394 | &dev_attr_revision.attr, | |
2395 | &dev_attr_firmware_revision.attr, | |
2396 | &dev_attr_ipmi_version.attr, | |
2397 | &dev_attr_additional_device_support.attr, | |
2398 | &dev_attr_manufacturer_id.attr, | |
2399 | &dev_attr_product_id.attr, | |
2d06a0c9 TI |
2400 | &dev_attr_aux_firmware_revision.attr, |
2401 | &dev_attr_guid.attr, | |
16639eb0 CM |
2402 | NULL |
2403 | }; | |
50c812b2 | 2404 | |
2d06a0c9 TI |
2405 | static umode_t bmc_dev_attr_is_visible(struct kobject *kobj, |
2406 | struct attribute *attr, int idx) | |
2407 | { | |
2408 | struct device *dev = kobj_to_dev(kobj); | |
2409 | struct bmc_device *bmc = to_bmc_device(dev); | |
2410 | umode_t mode = attr->mode; | |
2411 | ||
2412 | if (attr == &dev_attr_aux_firmware_revision.attr) | |
2413 | return bmc->id.aux_firmware_revision_set ? mode : 0; | |
2414 | if (attr == &dev_attr_guid.attr) | |
2415 | return bmc->guid_set ? mode : 0; | |
2416 | return mode; | |
2417 | } | |
2418 | ||
1e7a75f7 | 2419 | static const struct attribute_group bmc_dev_attr_group = { |
16639eb0 | 2420 | .attrs = bmc_dev_attrs, |
2d06a0c9 | 2421 | .is_visible = bmc_dev_attr_is_visible, |
16639eb0 | 2422 | }; |
5e59393e | 2423 | |
16639eb0 CM |
2424 | static const struct attribute_group *bmc_dev_attr_groups[] = { |
2425 | &bmc_dev_attr_group, | |
2426 | NULL | |
2427 | }; | |
2428 | ||
1e7a75f7 | 2429 | static const struct device_type bmc_device_type = { |
16639eb0 CM |
2430 | .groups = bmc_dev_attr_groups, |
2431 | }; | |
2432 | ||
f33e4df8 CM |
2433 | static int __find_bmc_guid(struct device *dev, void *data) |
2434 | { | |
2435 | unsigned char *id = data; | |
2436 | struct bmc_device *bmc = to_bmc_device(dev); | |
2437 | ||
2438 | return memcmp(bmc->guid, id, 16) == 0; | |
2439 | } | |
2440 | ||
2441 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2442 | unsigned char *guid) | |
2443 | { | |
2444 | struct device *dev; | |
2445 | ||
2446 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2447 | if (dev) | |
2448 | return to_bmc_device(dev); | |
2449 | else | |
2450 | return NULL; | |
2451 | } | |
2452 | ||
2453 | struct prod_dev_id { | |
2454 | unsigned int product_id; | |
2455 | unsigned char device_id; | |
2456 | }; | |
2457 | ||
2458 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2459 | { | |
2460 | struct prod_dev_id *id = data; | |
2461 | struct bmc_device *bmc = to_bmc_device(dev); | |
2462 | ||
2463 | return (bmc->id.product_id == id->product_id | |
2464 | && bmc->id.device_id == id->device_id); | |
2465 | } | |
2466 | ||
2467 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2468 | struct device_driver *drv, | |
2469 | unsigned int product_id, unsigned char device_id) | |
2470 | { | |
2471 | struct prod_dev_id id = { | |
2472 | .product_id = product_id, | |
2473 | .device_id = device_id, | |
2474 | }; | |
2475 | struct device *dev; | |
2476 | ||
2477 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2478 | if (dev) | |
2479 | return to_bmc_device(dev); | |
2480 | else | |
2481 | return NULL; | |
2482 | } | |
2483 | ||
16639eb0 CM |
2484 | static void |
2485 | release_bmc_device(struct device *dev) | |
2486 | { | |
2487 | kfree(to_bmc_device(dev)); | |
5e59393e JG |
2488 | } |
2489 | ||
2490 | static void | |
2491 | cleanup_bmc_device(struct kref *ref) | |
2492 | { | |
16639eb0 | 2493 | struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount); |
5e59393e | 2494 | |
16639eb0 | 2495 | platform_device_unregister(&bmc->pdev); |
50c812b2 CM |
2496 | } |
2497 | ||
2498 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2499 | { | |
2500 | struct bmc_device *bmc = intf->bmc; | |
2501 | ||
5a0e10ec | 2502 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); |
50c812b2 | 2503 | if (intf->my_dev_name) { |
16639eb0 | 2504 | sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name); |
50c812b2 CM |
2505 | kfree(intf->my_dev_name); |
2506 | intf->my_dev_name = NULL; | |
2507 | } | |
2508 | ||
2509 | mutex_lock(&ipmidriver_mutex); | |
16639eb0 | 2510 | kref_put(&bmc->usecount, cleanup_bmc_device); |
f0b55da0 | 2511 | intf->bmc = NULL; |
50c812b2 CM |
2512 | mutex_unlock(&ipmidriver_mutex); |
2513 | } | |
2514 | ||
5a0e10ec | 2515 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) |
50c812b2 CM |
2516 | { |
2517 | int rv; | |
2518 | struct bmc_device *bmc = intf->bmc; | |
2519 | struct bmc_device *old_bmc; | |
50c812b2 CM |
2520 | |
2521 | mutex_lock(&ipmidriver_mutex); | |
2522 | ||
2523 | /* | |
2524 | * Try to find if there is an bmc_device struct | |
2525 | * representing the interfaced BMC already | |
2526 | */ | |
2527 | if (bmc->guid_set) | |
fe2d5ffc | 2528 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2529 | else |
fe2d5ffc | 2530 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2531 | bmc->id.product_id, |
2532 | bmc->id.device_id); | |
2533 | ||
2534 | /* | |
2535 | * If there is already an bmc_device, free the new one, | |
2536 | * otherwise register the new BMC device | |
2537 | */ | |
2538 | if (old_bmc) { | |
2539 | kfree(bmc); | |
2540 | intf->bmc = old_bmc; | |
2541 | bmc = old_bmc; | |
2542 | ||
16639eb0 | 2543 | kref_get(&bmc->usecount); |
50c812b2 CM |
2544 | mutex_unlock(&ipmidriver_mutex); |
2545 | ||
2546 | printk(KERN_INFO | |
2547 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2548 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2549 | bmc->id.manufacturer_id, | |
2550 | bmc->id.product_id, | |
2551 | bmc->id.device_id); | |
2552 | } else { | |
f0b55da0 CM |
2553 | unsigned char orig_dev_id = bmc->id.device_id; |
2554 | int warn_printed = 0; | |
2555 | ||
16639eb0 | 2556 | snprintf(bmc->name, sizeof(bmc->name), |
f0b55da0 | 2557 | "ipmi_bmc.%4.4x", bmc->id.product_id); |
16639eb0 | 2558 | bmc->pdev.name = bmc->name; |
f0b55da0 | 2559 | |
fe2d5ffc | 2560 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
f0b55da0 | 2561 | bmc->id.product_id, |
1d5636cc | 2562 | bmc->id.device_id)) { |
f0b55da0 CM |
2563 | if (!warn_printed) { |
2564 | printk(KERN_WARNING PFX | |
2565 | "This machine has two different BMCs" | |
2566 | " with the same product id and device" | |
2567 | " id. This is an error in the" | |
2568 | " firmware, but incrementing the" | |
2569 | " device id to work around the problem." | |
2570 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2571 | bmc->id.product_id, bmc->id.device_id); | |
2572 | warn_printed = 1; | |
2573 | } | |
2574 | bmc->id.device_id++; /* Wraps at 255 */ | |
2575 | if (bmc->id.device_id == orig_dev_id) { | |
2576 | printk(KERN_ERR PFX | |
2577 | "Out of device ids!\n"); | |
2578 | break; | |
2579 | } | |
2580 | } | |
2581 | ||
16639eb0 CM |
2582 | bmc->pdev.dev.driver = &ipmidriver.driver; |
2583 | bmc->pdev.id = bmc->id.device_id; | |
2584 | bmc->pdev.dev.release = release_bmc_device; | |
2585 | bmc->pdev.dev.type = &bmc_device_type; | |
5a0e10ec | 2586 | kref_init(&bmc->usecount); |
50c812b2 | 2587 | |
16639eb0 | 2588 | rv = platform_device_register(&bmc->pdev); |
50c812b2 CM |
2589 | mutex_unlock(&ipmidriver_mutex); |
2590 | if (rv) { | |
16639eb0 | 2591 | put_device(&bmc->pdev.dev); |
50c812b2 CM |
2592 | printk(KERN_ERR |
2593 | "ipmi_msghandler:" | |
2594 | " Unable to register bmc device: %d\n", | |
2595 | rv); | |
c70d7499 CM |
2596 | /* |
2597 | * Don't go to out_err, you can only do that if | |
2598 | * the device is registered already. | |
2599 | */ | |
50c812b2 CM |
2600 | return rv; |
2601 | } | |
2602 | ||
279fbd0c MS |
2603 | dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, " |
2604 | "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2605 | bmc->id.manufacturer_id, | |
2606 | bmc->id.product_id, | |
2607 | bmc->id.device_id); | |
50c812b2 CM |
2608 | } |
2609 | ||
2610 | /* | |
2611 | * create symlink from system interface device to bmc device | |
2612 | * and back. | |
2613 | */ | |
5a0e10ec | 2614 | rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc"); |
50c812b2 CM |
2615 | if (rv) { |
2616 | printk(KERN_ERR | |
2617 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2618 | rv); | |
2619 | goto out_err; | |
2620 | } | |
2621 | ||
16639eb0 | 2622 | intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", ifnum); |
50c812b2 CM |
2623 | if (!intf->my_dev_name) { |
2624 | rv = -ENOMEM; | |
2625 | printk(KERN_ERR | |
2626 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2627 | rv); | |
2628 | goto out_err; | |
2629 | } | |
50c812b2 | 2630 | |
16639eb0 | 2631 | rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj, |
50c812b2 CM |
2632 | intf->my_dev_name); |
2633 | if (rv) { | |
2634 | kfree(intf->my_dev_name); | |
2635 | intf->my_dev_name = NULL; | |
2636 | printk(KERN_ERR | |
2637 | "ipmi_msghandler:" | |
2638 | " Unable to create symlink to bmc: %d\n", | |
2639 | rv); | |
2640 | goto out_err; | |
2641 | } | |
2642 | ||
2643 | return 0; | |
2644 | ||
2645 | out_err: | |
2646 | ipmi_bmc_unregister(intf); | |
2647 | return rv; | |
2648 | } | |
2649 | ||
2650 | static int | |
2651 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2652 | { | |
2653 | struct kernel_ipmi_msg msg; | |
2654 | struct ipmi_system_interface_addr si; | |
2655 | ||
2656 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2657 | si.channel = IPMI_BMC_CHANNEL; | |
2658 | si.lun = 0; | |
2659 | ||
2660 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2661 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2662 | msg.data = NULL; | |
2663 | msg.data_len = 0; | |
2664 | return i_ipmi_request(NULL, | |
2665 | intf, | |
2666 | (struct ipmi_addr *) &si, | |
2667 | 0, | |
2668 | &msg, | |
2669 | intf, | |
2670 | NULL, | |
2671 | NULL, | |
2672 | 0, | |
2673 | intf->channels[0].address, | |
2674 | intf->channels[0].lun, | |
2675 | -1, 0); | |
2676 | } | |
2677 | ||
2678 | static void | |
2679 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2680 | { | |
2681 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2682 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2683 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2684 | /* Not for me */ | |
2685 | return; | |
2686 | ||
2687 | if (msg->msg.data[0] != 0) { | |
2688 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2689 | intf->bmc->guid_set = 0; | |
2690 | goto out; | |
2691 | } | |
2692 | ||
2693 | if (msg->msg.data_len < 17) { | |
2694 | intf->bmc->guid_set = 0; | |
2695 | printk(KERN_WARNING PFX | |
2696 | "guid_handler: The GUID response from the BMC was too" | |
2697 | " short, it was %d but should have been 17. Assuming" | |
2698 | " GUID is not available.\n", | |
2699 | msg->msg.data_len); | |
2700 | goto out; | |
2701 | } | |
2702 | ||
72630d9a | 2703 | memcpy(intf->bmc->guid, msg->msg.data + 1, 16); |
50c812b2 CM |
2704 | intf->bmc->guid_set = 1; |
2705 | out: | |
2706 | wake_up(&intf->waitq); | |
2707 | } | |
2708 | ||
2709 | static void | |
2710 | get_guid(ipmi_smi_t intf) | |
2711 | { | |
2712 | int rv; | |
2713 | ||
2714 | intf->bmc->guid_set = 0x2; | |
2715 | intf->null_user_handler = guid_handler; | |
2716 | rv = send_guid_cmd(intf, 0); | |
2717 | if (rv) | |
2718 | /* Send failed, no GUID available. */ | |
2719 | intf->bmc->guid_set = 0; | |
2720 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2721 | intf->null_user_handler = NULL; | |
2722 | } | |
2723 | ||
1da177e4 LT |
2724 | static int |
2725 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2726 | { | |
2727 | struct kernel_ipmi_msg msg; | |
2728 | unsigned char data[1]; | |
2729 | struct ipmi_system_interface_addr si; | |
2730 | ||
2731 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2732 | si.channel = IPMI_BMC_CHANNEL; | |
2733 | si.lun = 0; | |
2734 | ||
2735 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2736 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2737 | msg.data = data; | |
2738 | msg.data_len = 1; | |
2739 | data[0] = chan; | |
2740 | return i_ipmi_request(NULL, | |
2741 | intf, | |
2742 | (struct ipmi_addr *) &si, | |
2743 | 0, | |
2744 | &msg, | |
56a55ec6 | 2745 | intf, |
1da177e4 LT |
2746 | NULL, |
2747 | NULL, | |
2748 | 0, | |
c14979b9 CM |
2749 | intf->channels[0].address, |
2750 | intf->channels[0].lun, | |
1da177e4 LT |
2751 | -1, 0); |
2752 | } | |
2753 | ||
2754 | static void | |
56a55ec6 | 2755 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2756 | { |
2757 | int rv = 0; | |
2758 | int chan; | |
2759 | ||
56a55ec6 CM |
2760 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2761 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2762 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2763 | /* It's the one we want */ |
56a55ec6 | 2764 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2765 | /* Got an error from the channel, just go on. */ |
2766 | ||
56a55ec6 | 2767 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2768 | /* |
2769 | * If the MC does not support this | |
2770 | * command, that is legal. We just | |
2771 | * assume it has one IPMB at channel | |
2772 | * zero. | |
2773 | */ | |
1da177e4 LT |
2774 | intf->channels[0].medium |
2775 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2776 | intf->channels[0].protocol | |
2777 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2778 | |
2779 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2780 | wake_up(&intf->waitq); | |
2781 | goto out; | |
2782 | } | |
2783 | goto next_channel; | |
2784 | } | |
56a55ec6 | 2785 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2786 | /* Message not big enough, just go on. */ |
2787 | goto next_channel; | |
2788 | } | |
2789 | chan = intf->curr_channel; | |
56a55ec6 CM |
2790 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2791 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2792 | |
c70d7499 | 2793 | next_channel: |
1da177e4 LT |
2794 | intf->curr_channel++; |
2795 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2796 | wake_up(&intf->waitq); | |
2797 | else | |
2798 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2799 | ||
2800 | if (rv) { | |
2801 | /* Got an error somehow, just give up. */ | |
1f668423 CM |
2802 | printk(KERN_WARNING PFX |
2803 | "Error sending channel information for channel" | |
2804 | " %d: %d\n", intf->curr_channel, rv); | |
2805 | ||
1da177e4 LT |
2806 | intf->curr_channel = IPMI_MAX_CHANNELS; |
2807 | wake_up(&intf->waitq); | |
1da177e4 LT |
2808 | } |
2809 | } | |
2810 | out: | |
2811 | return; | |
2812 | } | |
2813 | ||
895dcfd1 | 2814 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 2815 | { |
fcfa4724 CM |
2816 | if (intf->handlers->poll) |
2817 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
2818 | /* In case something came in */ |
2819 | handle_new_recv_msgs(intf); | |
fcfa4724 | 2820 | } |
895dcfd1 CM |
2821 | |
2822 | void ipmi_poll_interface(ipmi_user_t user) | |
2823 | { | |
2824 | ipmi_poll(user->intf); | |
fcfa4724 | 2825 | } |
c70d7499 | 2826 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2827 | |
81d02b7f | 2828 | int ipmi_register_smi(const struct ipmi_smi_handlers *handlers, |
1da177e4 | 2829 | void *send_info, |
50c812b2 CM |
2830 | struct ipmi_device_id *device_id, |
2831 | struct device *si_dev, | |
453823ba | 2832 | unsigned char slave_addr) |
1da177e4 LT |
2833 | { |
2834 | int i, j; | |
2835 | int rv; | |
393d2cc3 | 2836 | ipmi_smi_t intf; |
bca0324d | 2837 | ipmi_smi_t tintf; |
bca0324d | 2838 | struct list_head *link; |
1da177e4 | 2839 | |
c70d7499 CM |
2840 | /* |
2841 | * Make sure the driver is actually initialized, this handles | |
2842 | * problems with initialization order. | |
2843 | */ | |
1da177e4 LT |
2844 | if (!initialized) { |
2845 | rv = ipmi_init_msghandler(); | |
2846 | if (rv) | |
2847 | return rv; | |
c70d7499 CM |
2848 | /* |
2849 | * The init code doesn't return an error if it was turned | |
2850 | * off, but it won't initialize. Check that. | |
2851 | */ | |
1da177e4 LT |
2852 | if (!initialized) |
2853 | return -ENODEV; | |
2854 | } | |
2855 | ||
dd00cc48 | 2856 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2857 | if (!intf) |
1da177e4 | 2858 | return -ENOMEM; |
b2c03941 CM |
2859 | |
2860 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2861 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2862 | ||
50c812b2 CM |
2863 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2864 | if (!intf->bmc) { | |
2865 | kfree(intf); | |
2866 | return -ENOMEM; | |
2867 | } | |
bca0324d | 2868 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2869 | kref_init(&intf->refcount); |
50c812b2 CM |
2870 | intf->bmc->id = *device_id; |
2871 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2872 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2873 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2874 | intf->channels[j].lun = 2; | |
2875 | } | |
2876 | if (slave_addr != 0) | |
2877 | intf->channels[0].address = slave_addr; | |
2878 | INIT_LIST_HEAD(&intf->users); | |
2879 | intf->handlers = handlers; | |
2880 | intf->send_info = send_info; | |
2881 | spin_lock_init(&intf->seq_lock); | |
2882 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2883 | intf->seq_table[j].inuse = 0; | |
2884 | intf->seq_table[j].seqid = 0; | |
2885 | } | |
2886 | intf->curr_seq = 0; | |
2887 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2888 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 | 2889 | #endif |
65be7544 CM |
2890 | spin_lock_init(&intf->waiting_rcv_msgs_lock); |
2891 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
7adf579c CM |
2892 | tasklet_init(&intf->recv_tasklet, |
2893 | smi_recv_tasklet, | |
2894 | (unsigned long) intf); | |
2895 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
7ea0ed2b CM |
2896 | spin_lock_init(&intf->xmit_msgs_lock); |
2897 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
2898 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
393d2cc3 | 2899 | spin_lock_init(&intf->events_lock); |
89986496 CM |
2900 | atomic_set(&intf->event_waiters, 0); |
2901 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
2902 | INIT_LIST_HEAD(&intf->waiting_events); |
2903 | intf->waiting_events_count = 0; | |
d6dfd131 | 2904 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2905 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2906 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2907 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2908 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2909 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2910 | |
393d2cc3 | 2911 | intf->proc_dir = NULL; |
1da177e4 | 2912 | |
b2c03941 | 2913 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2914 | mutex_lock(&ipmi_interfaces_mutex); |
2915 | /* Look for a hole in the numbers. */ | |
2916 | i = 0; | |
2917 | link = &ipmi_interfaces; | |
2918 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2919 | if (tintf->intf_num != i) { | |
2920 | link = &tintf->link; | |
1da177e4 LT |
2921 | break; |
2922 | } | |
bca0324d | 2923 | i++; |
1da177e4 | 2924 | } |
bca0324d CM |
2925 | /* Add the new interface in numeric order. */ |
2926 | if (i == 0) | |
2927 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2928 | else | |
2929 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2930 | |
453823ba CM |
2931 | rv = handlers->start_processing(send_info, intf); |
2932 | if (rv) | |
2933 | goto out; | |
1da177e4 | 2934 | |
50c812b2 CM |
2935 | get_guid(intf); |
2936 | ||
b2c03941 | 2937 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2938 | || ((intf->ipmi_version_major == 1) |
2939 | && (intf->ipmi_version_minor >= 5))) { | |
2940 | /* | |
2941 | * Start scanning the channels to see what is | |
2942 | * available. | |
2943 | */ | |
393d2cc3 CM |
2944 | intf->null_user_handler = channel_handler; |
2945 | intf->curr_channel = 0; | |
2946 | rv = send_channel_info_cmd(intf, 0); | |
1f668423 CM |
2947 | if (rv) { |
2948 | printk(KERN_WARNING PFX | |
2949 | "Error sending channel information for channel" | |
2950 | " 0, %d\n", rv); | |
393d2cc3 | 2951 | goto out; |
1f668423 | 2952 | } |
1da177e4 | 2953 | |
393d2cc3 CM |
2954 | /* Wait for the channel info to be read. */ |
2955 | wait_event(intf->waitq, | |
2956 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2957 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2958 | } else { |
2959 | /* Assume a single IPMB channel at zero. */ | |
2960 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2961 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
9a2845c4 | 2962 | intf->curr_channel = IPMI_MAX_CHANNELS; |
1da177e4 LT |
2963 | } |
2964 | ||
bd85f4b3 XX |
2965 | rv = ipmi_bmc_register(intf, i); |
2966 | ||
393d2cc3 CM |
2967 | if (rv == 0) |
2968 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2969 | |
393d2cc3 | 2970 | out: |
1da177e4 | 2971 | if (rv) { |
393d2cc3 CM |
2972 | if (intf->proc_dir) |
2973 | remove_proc_entries(intf); | |
b2c03941 | 2974 | intf->handlers = NULL; |
bca0324d CM |
2975 | list_del_rcu(&intf->link); |
2976 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2977 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2978 | synchronize_rcu(); |
393d2cc3 | 2979 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2980 | } else { |
78ba2faf CM |
2981 | /* |
2982 | * Keep memory order straight for RCU readers. Make | |
2983 | * sure everything else is committed to memory before | |
2984 | * setting intf_num to mark the interface valid. | |
2985 | */ | |
2986 | smp_wmb(); | |
bca0324d CM |
2987 | intf->intf_num = i; |
2988 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 2989 | /* After this point the interface is legal to use. */ |
50c812b2 | 2990 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 2991 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
2992 | } |
2993 | ||
2994 | return rv; | |
2995 | } | |
c70d7499 | 2996 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 2997 | |
7ea0ed2b CM |
2998 | static void deliver_smi_err_response(ipmi_smi_t intf, |
2999 | struct ipmi_smi_msg *msg, | |
3000 | unsigned char err) | |
3001 | { | |
3002 | msg->rsp[0] = msg->data[0] | 4; | |
3003 | msg->rsp[1] = msg->data[1]; | |
3004 | msg->rsp[2] = err; | |
3005 | msg->rsp_size = 3; | |
3006 | /* It's an error, so it will never requeue, no need to check return. */ | |
3007 | handle_one_recv_msg(intf, msg); | |
3008 | } | |
3009 | ||
b2c03941 CM |
3010 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
3011 | { | |
3012 | int i; | |
3013 | struct seq_table *ent; | |
7ea0ed2b CM |
3014 | struct ipmi_smi_msg *msg; |
3015 | struct list_head *entry; | |
3016 | struct list_head tmplist; | |
3017 | ||
3018 | /* Clear out our transmit queues and hold the messages. */ | |
3019 | INIT_LIST_HEAD(&tmplist); | |
3020 | list_splice_tail(&intf->hp_xmit_msgs, &tmplist); | |
3021 | list_splice_tail(&intf->xmit_msgs, &tmplist); | |
3022 | ||
3023 | /* Current message first, to preserve order */ | |
3024 | while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) { | |
3025 | /* Wait for the message to clear out. */ | |
3026 | schedule_timeout(1); | |
3027 | } | |
b2c03941 CM |
3028 | |
3029 | /* No need for locks, the interface is down. */ | |
7ea0ed2b CM |
3030 | |
3031 | /* | |
3032 | * Return errors for all pending messages in queue and in the | |
3033 | * tables waiting for remote responses. | |
3034 | */ | |
3035 | while (!list_empty(&tmplist)) { | |
3036 | entry = tmplist.next; | |
3037 | list_del(entry); | |
3038 | msg = list_entry(entry, struct ipmi_smi_msg, link); | |
3039 | deliver_smi_err_response(intf, msg, IPMI_ERR_UNSPECIFIED); | |
3040 | } | |
3041 | ||
b2c03941 CM |
3042 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
3043 | ent = &(intf->seq_table[i]); | |
3044 | if (!ent->inuse) | |
3045 | continue; | |
3046 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
3047 | } | |
3048 | } | |
3049 | ||
1da177e4 LT |
3050 | int ipmi_unregister_smi(ipmi_smi_t intf) |
3051 | { | |
1da177e4 | 3052 | struct ipmi_smi_watcher *w; |
7ea0ed2b CM |
3053 | int intf_num = intf->intf_num; |
3054 | ipmi_user_t user; | |
1da177e4 | 3055 | |
b2c03941 | 3056 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 3057 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 | 3058 | intf->intf_num = -1; |
7ea0ed2b | 3059 | intf->in_shutdown = true; |
bca0324d CM |
3060 | list_del_rcu(&intf->link); |
3061 | mutex_unlock(&ipmi_interfaces_mutex); | |
3062 | synchronize_rcu(); | |
1da177e4 | 3063 | |
b2c03941 CM |
3064 | cleanup_smi_msgs(intf); |
3065 | ||
7ea0ed2b CM |
3066 | /* Clean up the effects of users on the lower-level software. */ |
3067 | mutex_lock(&ipmi_interfaces_mutex); | |
3068 | rcu_read_lock(); | |
3069 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3070 | module_put(intf->handlers->owner); | |
3071 | if (intf->handlers->dec_usecount) | |
3072 | intf->handlers->dec_usecount(intf->send_info); | |
3073 | } | |
3074 | rcu_read_unlock(); | |
3075 | intf->handlers = NULL; | |
3076 | mutex_unlock(&ipmi_interfaces_mutex); | |
3077 | ||
393d2cc3 | 3078 | remove_proc_entries(intf); |
bd85f4b3 | 3079 | ipmi_bmc_unregister(intf); |
1da177e4 | 3080 | |
c70d7499 CM |
3081 | /* |
3082 | * Call all the watcher interfaces to tell them that | |
3083 | * an interface is gone. | |
3084 | */ | |
393d2cc3 | 3085 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3086 | w->smi_gone(intf_num); |
3087 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3088 | |
393d2cc3 | 3089 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3090 | return 0; |
3091 | } | |
c70d7499 | 3092 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3093 | |
3094 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3095 | struct ipmi_smi_msg *msg) | |
3096 | { | |
3097 | struct ipmi_ipmb_addr ipmb_addr; | |
3098 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3099 | |
c70d7499 CM |
3100 | /* |
3101 | * This is 11, not 10, because the response must contain a | |
3102 | * completion code. | |
3103 | */ | |
1da177e4 LT |
3104 | if (msg->rsp_size < 11) { |
3105 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3106 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3107 | return 0; |
3108 | } | |
3109 | ||
3110 | if (msg->rsp[2] != 0) { | |
3111 | /* An error getting the response, just ignore it. */ | |
3112 | return 0; | |
3113 | } | |
3114 | ||
3115 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3116 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3117 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3118 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3119 | ||
c70d7499 CM |
3120 | /* |
3121 | * It's a response from a remote entity. Look up the sequence | |
3122 | * number and handle the response. | |
3123 | */ | |
1da177e4 LT |
3124 | if (intf_find_seq(intf, |
3125 | msg->rsp[7] >> 2, | |
3126 | msg->rsp[3] & 0x0f, | |
3127 | msg->rsp[8], | |
3128 | (msg->rsp[4] >> 2) & (~1), | |
3129 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3130 | &recv_msg)) { |
3131 | /* | |
3132 | * We were unable to find the sequence number, | |
3133 | * so just nuke the message. | |
3134 | */ | |
b2655f26 | 3135 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3136 | return 0; |
3137 | } | |
3138 | ||
3139 | memcpy(recv_msg->msg_data, | |
3140 | &(msg->rsp[9]), | |
3141 | msg->rsp_size - 9); | |
c70d7499 CM |
3142 | /* |
3143 | * The other fields matched, so no need to set them, except | |
3144 | * for netfn, which needs to be the response that was | |
3145 | * returned, not the request value. | |
3146 | */ | |
1da177e4 LT |
3147 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3148 | recv_msg->msg.data = recv_msg->msg_data; | |
3149 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3150 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3151 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3152 | deliver_response(recv_msg); |
3153 | ||
3154 | return 0; | |
3155 | } | |
3156 | ||
3157 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3158 | struct ipmi_smi_msg *msg) | |
3159 | { | |
393d2cc3 CM |
3160 | struct cmd_rcvr *rcvr; |
3161 | int rv = 0; | |
3162 | unsigned char netfn; | |
3163 | unsigned char cmd; | |
c69c3127 | 3164 | unsigned char chan; |
393d2cc3 CM |
3165 | ipmi_user_t user = NULL; |
3166 | struct ipmi_ipmb_addr *ipmb_addr; | |
3167 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3168 | |
3169 | if (msg->rsp_size < 10) { | |
3170 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3171 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3172 | return 0; |
3173 | } | |
3174 | ||
3175 | if (msg->rsp[2] != 0) { | |
3176 | /* An error getting the response, just ignore it. */ | |
3177 | return 0; | |
3178 | } | |
3179 | ||
3180 | netfn = msg->rsp[4] >> 2; | |
3181 | cmd = msg->rsp[8]; | |
c69c3127 | 3182 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3183 | |
e61fb5b6 | 3184 | rcu_read_lock(); |
c69c3127 | 3185 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3186 | if (rcvr) { |
3187 | user = rcvr->user; | |
3188 | kref_get(&user->refcount); | |
3189 | } else | |
3190 | user = NULL; | |
e61fb5b6 | 3191 | rcu_read_unlock(); |
1da177e4 LT |
3192 | |
3193 | if (user == NULL) { | |
3194 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3195 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3196 | |
3197 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3198 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3199 | msg->data[2] = msg->rsp[3]; | |
3200 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3201 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3202 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3203 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3204 | /* rqseq/lun */ |
3205 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3206 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3207 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3208 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3209 | msg->data_size = 11; | |
3210 | ||
3211 | #ifdef DEBUG_MSGING | |
3212 | { | |
3213 | int m; | |
3214 | printk("Invalid command:"); | |
e8b33617 | 3215 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3216 | printk(" %2.2x", msg->data[m]); |
3217 | printk("\n"); | |
3218 | } | |
3219 | #endif | |
b2c03941 | 3220 | rcu_read_lock(); |
7ea0ed2b CM |
3221 | if (!intf->in_shutdown) { |
3222 | smi_send(intf, intf->handlers, msg, 0); | |
c70d7499 CM |
3223 | /* |
3224 | * We used the message, so return the value | |
3225 | * that causes it to not be freed or | |
3226 | * queued. | |
3227 | */ | |
b2c03941 CM |
3228 | rv = -1; |
3229 | } | |
3230 | rcu_read_unlock(); | |
1da177e4 LT |
3231 | } else { |
3232 | /* Deliver the message to the user. */ | |
b2655f26 | 3233 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3234 | |
3235 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3236 | if (!recv_msg) { |
c70d7499 CM |
3237 | /* |
3238 | * We couldn't allocate memory for the | |
3239 | * message, so requeue it for handling | |
3240 | * later. | |
3241 | */ | |
1da177e4 | 3242 | rv = 1; |
393d2cc3 | 3243 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3244 | } else { |
3245 | /* Extract the source address from the data. */ | |
3246 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3247 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3248 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3249 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3250 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3251 | ||
c70d7499 CM |
3252 | /* |
3253 | * Extract the rest of the message information | |
3254 | * from the IPMB header. | |
3255 | */ | |
1da177e4 LT |
3256 | recv_msg->user = user; |
3257 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3258 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3259 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3260 | recv_msg->msg.cmd = msg->rsp[8]; | |
3261 | recv_msg->msg.data = recv_msg->msg_data; | |
3262 | ||
c70d7499 CM |
3263 | /* |
3264 | * We chop off 10, not 9 bytes because the checksum | |
3265 | * at the end also needs to be removed. | |
3266 | */ | |
1da177e4 LT |
3267 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3268 | memcpy(recv_msg->msg_data, | |
3269 | &(msg->rsp[9]), | |
3270 | msg->rsp_size - 10); | |
3271 | deliver_response(recv_msg); | |
3272 | } | |
3273 | } | |
3274 | ||
3275 | return rv; | |
3276 | } | |
3277 | ||
3278 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3279 | struct ipmi_smi_msg *msg) | |
3280 | { | |
3281 | struct ipmi_lan_addr lan_addr; | |
3282 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3283 | |
3284 | ||
c70d7499 CM |
3285 | /* |
3286 | * This is 13, not 12, because the response must contain a | |
3287 | * completion code. | |
3288 | */ | |
1da177e4 LT |
3289 | if (msg->rsp_size < 13) { |
3290 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3291 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3292 | return 0; |
3293 | } | |
3294 | ||
3295 | if (msg->rsp[2] != 0) { | |
3296 | /* An error getting the response, just ignore it. */ | |
3297 | return 0; | |
3298 | } | |
3299 | ||
3300 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3301 | lan_addr.session_handle = msg->rsp[4]; | |
3302 | lan_addr.remote_SWID = msg->rsp[8]; | |
3303 | lan_addr.local_SWID = msg->rsp[5]; | |
3304 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3305 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3306 | lan_addr.lun = msg->rsp[9] & 3; | |
3307 | ||
c70d7499 CM |
3308 | /* |
3309 | * It's a response from a remote entity. Look up the sequence | |
3310 | * number and handle the response. | |
3311 | */ | |
1da177e4 LT |
3312 | if (intf_find_seq(intf, |
3313 | msg->rsp[9] >> 2, | |
3314 | msg->rsp[3] & 0x0f, | |
3315 | msg->rsp[10], | |
3316 | (msg->rsp[6] >> 2) & (~1), | |
3317 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3318 | &recv_msg)) { |
3319 | /* | |
3320 | * We were unable to find the sequence number, | |
3321 | * so just nuke the message. | |
3322 | */ | |
b2655f26 | 3323 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3324 | return 0; |
3325 | } | |
3326 | ||
3327 | memcpy(recv_msg->msg_data, | |
3328 | &(msg->rsp[11]), | |
3329 | msg->rsp_size - 11); | |
c70d7499 CM |
3330 | /* |
3331 | * The other fields matched, so no need to set them, except | |
3332 | * for netfn, which needs to be the response that was | |
3333 | * returned, not the request value. | |
3334 | */ | |
1da177e4 LT |
3335 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3336 | recv_msg->msg.data = recv_msg->msg_data; | |
3337 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3338 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3339 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3340 | deliver_response(recv_msg); |
3341 | ||
3342 | return 0; | |
3343 | } | |
3344 | ||
3345 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3346 | struct ipmi_smi_msg *msg) | |
3347 | { | |
393d2cc3 CM |
3348 | struct cmd_rcvr *rcvr; |
3349 | int rv = 0; | |
3350 | unsigned char netfn; | |
3351 | unsigned char cmd; | |
c69c3127 | 3352 | unsigned char chan; |
393d2cc3 CM |
3353 | ipmi_user_t user = NULL; |
3354 | struct ipmi_lan_addr *lan_addr; | |
3355 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3356 | |
3357 | if (msg->rsp_size < 12) { | |
3358 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3359 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3360 | return 0; |
3361 | } | |
3362 | ||
3363 | if (msg->rsp[2] != 0) { | |
3364 | /* An error getting the response, just ignore it. */ | |
3365 | return 0; | |
3366 | } | |
3367 | ||
3368 | netfn = msg->rsp[6] >> 2; | |
3369 | cmd = msg->rsp[10]; | |
c69c3127 | 3370 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3371 | |
e61fb5b6 | 3372 | rcu_read_lock(); |
c69c3127 | 3373 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3374 | if (rcvr) { |
3375 | user = rcvr->user; | |
3376 | kref_get(&user->refcount); | |
3377 | } else | |
3378 | user = NULL; | |
e61fb5b6 | 3379 | rcu_read_unlock(); |
1da177e4 LT |
3380 | |
3381 | if (user == NULL) { | |
393d2cc3 | 3382 | /* We didn't find a user, just give up. */ |
b2655f26 | 3383 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3384 | |
c70d7499 CM |
3385 | /* |
3386 | * Don't do anything with these messages, just allow | |
3387 | * them to be freed. | |
3388 | */ | |
3389 | rv = 0; | |
1da177e4 LT |
3390 | } else { |
3391 | /* Deliver the message to the user. */ | |
b2655f26 | 3392 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3393 | |
3394 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3395 | if (!recv_msg) { |
c70d7499 CM |
3396 | /* |
3397 | * We couldn't allocate memory for the | |
3398 | * message, so requeue it for handling later. | |
3399 | */ | |
1da177e4 | 3400 | rv = 1; |
393d2cc3 | 3401 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3402 | } else { |
3403 | /* Extract the source address from the data. */ | |
3404 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3405 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3406 | lan_addr->session_handle = msg->rsp[4]; | |
3407 | lan_addr->remote_SWID = msg->rsp[8]; | |
3408 | lan_addr->local_SWID = msg->rsp[5]; | |
3409 | lan_addr->lun = msg->rsp[9] & 3; | |
3410 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3411 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3412 | ||
c70d7499 CM |
3413 | /* |
3414 | * Extract the rest of the message information | |
3415 | * from the IPMB header. | |
3416 | */ | |
1da177e4 LT |
3417 | recv_msg->user = user; |
3418 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3419 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3420 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3421 | recv_msg->msg.cmd = msg->rsp[10]; | |
3422 | recv_msg->msg.data = recv_msg->msg_data; | |
3423 | ||
c70d7499 CM |
3424 | /* |
3425 | * We chop off 12, not 11 bytes because the checksum | |
3426 | * at the end also needs to be removed. | |
3427 | */ | |
1da177e4 LT |
3428 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3429 | memcpy(recv_msg->msg_data, | |
3430 | &(msg->rsp[11]), | |
3431 | msg->rsp_size - 12); | |
3432 | deliver_response(recv_msg); | |
3433 | } | |
3434 | } | |
3435 | ||
3436 | return rv; | |
3437 | } | |
3438 | ||
4dec302f | 3439 | /* |
3440 | * This routine will handle "Get Message" command responses with | |
3441 | * channels that use an OEM Medium. The message format belongs to | |
3442 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3443 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3444 | */ | |
3445 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3446 | struct ipmi_smi_msg *msg) | |
3447 | { | |
3448 | struct cmd_rcvr *rcvr; | |
3449 | int rv = 0; | |
3450 | unsigned char netfn; | |
3451 | unsigned char cmd; | |
3452 | unsigned char chan; | |
3453 | ipmi_user_t user = NULL; | |
3454 | struct ipmi_system_interface_addr *smi_addr; | |
3455 | struct ipmi_recv_msg *recv_msg; | |
3456 | ||
3457 | /* | |
3458 | * We expect the OEM SW to perform error checking | |
3459 | * so we just do some basic sanity checks | |
3460 | */ | |
3461 | if (msg->rsp_size < 4) { | |
3462 | /* Message not big enough, just ignore it. */ | |
3463 | ipmi_inc_stat(intf, invalid_commands); | |
3464 | return 0; | |
3465 | } | |
3466 | ||
3467 | if (msg->rsp[2] != 0) { | |
3468 | /* An error getting the response, just ignore it. */ | |
3469 | return 0; | |
3470 | } | |
3471 | ||
3472 | /* | |
3473 | * This is an OEM Message so the OEM needs to know how | |
3474 | * handle the message. We do no interpretation. | |
3475 | */ | |
3476 | netfn = msg->rsp[0] >> 2; | |
3477 | cmd = msg->rsp[1]; | |
3478 | chan = msg->rsp[3] & 0xf; | |
3479 | ||
3480 | rcu_read_lock(); | |
3481 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3482 | if (rcvr) { | |
3483 | user = rcvr->user; | |
3484 | kref_get(&user->refcount); | |
3485 | } else | |
3486 | user = NULL; | |
3487 | rcu_read_unlock(); | |
3488 | ||
3489 | if (user == NULL) { | |
3490 | /* We didn't find a user, just give up. */ | |
3491 | ipmi_inc_stat(intf, unhandled_commands); | |
3492 | ||
3493 | /* | |
3494 | * Don't do anything with these messages, just allow | |
3495 | * them to be freed. | |
3496 | */ | |
3497 | ||
3498 | rv = 0; | |
3499 | } else { | |
3500 | /* Deliver the message to the user. */ | |
3501 | ipmi_inc_stat(intf, handled_commands); | |
3502 | ||
3503 | recv_msg = ipmi_alloc_recv_msg(); | |
3504 | if (!recv_msg) { | |
3505 | /* | |
3506 | * We couldn't allocate memory for the | |
3507 | * message, so requeue it for handling | |
3508 | * later. | |
3509 | */ | |
3510 | rv = 1; | |
3511 | kref_put(&user->refcount, free_user); | |
3512 | } else { | |
3513 | /* | |
3514 | * OEM Messages are expected to be delivered via | |
3515 | * the system interface to SMS software. We might | |
3516 | * need to visit this again depending on OEM | |
3517 | * requirements | |
3518 | */ | |
3519 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3520 | &(recv_msg->addr)); | |
3521 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3522 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3523 | smi_addr->lun = msg->rsp[0] & 3; | |
3524 | ||
3525 | recv_msg->user = user; | |
3526 | recv_msg->user_msg_data = NULL; | |
3527 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
3528 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3529 | recv_msg->msg.cmd = msg->rsp[1]; | |
3530 | recv_msg->msg.data = recv_msg->msg_data; | |
3531 | ||
3532 | /* | |
3533 | * The message starts at byte 4 which follows the | |
3534 | * the Channel Byte in the "GET MESSAGE" command | |
3535 | */ | |
3536 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
3537 | memcpy(recv_msg->msg_data, | |
3538 | &(msg->rsp[4]), | |
3539 | msg->rsp_size - 4); | |
3540 | deliver_response(recv_msg); | |
3541 | } | |
3542 | } | |
3543 | ||
3544 | return rv; | |
3545 | } | |
3546 | ||
1da177e4 LT |
3547 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
3548 | struct ipmi_smi_msg *msg) | |
3549 | { | |
3550 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3551 | |
1da177e4 LT |
3552 | recv_msg->msgid = 0; |
3553 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3554 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3555 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3556 | smi_addr->lun = msg->rsp[0] & 3; | |
3557 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3558 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3559 | recv_msg->msg.cmd = msg->rsp[1]; | |
3560 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3561 | recv_msg->msg.data = recv_msg->msg_data; | |
3562 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3563 | } | |
3564 | ||
1da177e4 LT |
3565 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3566 | struct ipmi_smi_msg *msg) | |
3567 | { | |
3568 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3569 | struct list_head msgs; | |
3570 | ipmi_user_t user; | |
3571 | int rv = 0; | |
3572 | int deliver_count = 0; | |
3573 | unsigned long flags; | |
3574 | ||
3575 | if (msg->rsp_size < 19) { | |
3576 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3577 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3578 | return 0; |
3579 | } | |
3580 | ||
3581 | if (msg->rsp[2] != 0) { | |
3582 | /* An error getting the event, just ignore it. */ | |
3583 | return 0; | |
3584 | } | |
3585 | ||
3586 | INIT_LIST_HEAD(&msgs); | |
3587 | ||
393d2cc3 | 3588 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3589 | |
b2655f26 | 3590 | ipmi_inc_stat(intf, events); |
1da177e4 | 3591 | |
c70d7499 CM |
3592 | /* |
3593 | * Allocate and fill in one message for every user that is | |
3594 | * getting events. | |
3595 | */ | |
393d2cc3 CM |
3596 | rcu_read_lock(); |
3597 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3598 | if (!user->gets_events) |
1da177e4 LT |
3599 | continue; |
3600 | ||
3601 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3602 | if (!recv_msg) { |
393d2cc3 | 3603 | rcu_read_unlock(); |
8a3628d5 CM |
3604 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3605 | link) { | |
1da177e4 LT |
3606 | list_del(&recv_msg->link); |
3607 | ipmi_free_recv_msg(recv_msg); | |
3608 | } | |
c70d7499 CM |
3609 | /* |
3610 | * We couldn't allocate memory for the | |
3611 | * message, so requeue it for handling | |
3612 | * later. | |
3613 | */ | |
1da177e4 LT |
3614 | rv = 1; |
3615 | goto out; | |
3616 | } | |
3617 | ||
3618 | deliver_count++; | |
3619 | ||
3620 | copy_event_into_recv_msg(recv_msg, msg); | |
3621 | recv_msg->user = user; | |
393d2cc3 | 3622 | kref_get(&user->refcount); |
1da177e4 LT |
3623 | list_add_tail(&(recv_msg->link), &msgs); |
3624 | } | |
393d2cc3 | 3625 | rcu_read_unlock(); |
1da177e4 LT |
3626 | |
3627 | if (deliver_count) { | |
3628 | /* Now deliver all the messages. */ | |
3629 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3630 | list_del(&recv_msg->link); | |
3631 | deliver_response(recv_msg); | |
3632 | } | |
3633 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3634 | /* |
3635 | * No one to receive the message, put it in queue if there's | |
3636 | * not already too many things in the queue. | |
3637 | */ | |
1da177e4 | 3638 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3639 | if (!recv_msg) { |
c70d7499 CM |
3640 | /* |
3641 | * We couldn't allocate memory for the | |
3642 | * message, so requeue it for handling | |
3643 | * later. | |
3644 | */ | |
1da177e4 LT |
3645 | rv = 1; |
3646 | goto out; | |
3647 | } | |
3648 | ||
3649 | copy_event_into_recv_msg(recv_msg, msg); | |
3650 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3651 | intf->waiting_events_count++; |
87ebd06f | 3652 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3653 | /* |
3654 | * There's too many things in the queue, discard this | |
3655 | * message. | |
3656 | */ | |
87ebd06f CM |
3657 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3658 | " incoming events\n"); | |
3659 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3660 | } |
3661 | ||
3662 | out: | |
3663 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3664 | ||
3665 | return rv; | |
3666 | } | |
3667 | ||
3668 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3669 | struct ipmi_smi_msg *msg) | |
3670 | { | |
3671 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3672 | struct ipmi_user *user; |
1da177e4 LT |
3673 | |
3674 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3675 | if (recv_msg == NULL) { |
3676 | printk(KERN_WARNING | |
3677 | "IPMI message received with no owner. This\n" | |
3678 | "could be because of a malformed message, or\n" | |
3679 | "because of a hardware error. Contact your\n" | |
3680 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3681 | return 0; |
3682 | } | |
1da177e4 | 3683 | |
393d2cc3 | 3684 | user = recv_msg->user; |
1da177e4 | 3685 | /* Make sure the user still exists. */ |
393d2cc3 | 3686 | if (user && !user->valid) { |
56a55ec6 | 3687 | /* The user for the message went away, so give up. */ |
b2655f26 | 3688 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3689 | ipmi_free_recv_msg(recv_msg); |
3690 | } else { | |
3691 | struct ipmi_system_interface_addr *smi_addr; | |
3692 | ||
b2655f26 | 3693 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3694 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3695 | recv_msg->msgid = msg->msgid; | |
3696 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3697 | &(recv_msg->addr)); | |
3698 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3699 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3700 | smi_addr->lun = msg->rsp[0] & 3; | |
3701 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3702 | recv_msg->msg.cmd = msg->rsp[1]; | |
3703 | memcpy(recv_msg->msg_data, | |
3704 | &(msg->rsp[2]), | |
3705 | msg->rsp_size - 2); | |
3706 | recv_msg->msg.data = recv_msg->msg_data; | |
3707 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3708 | deliver_response(recv_msg); | |
3709 | } | |
3710 | ||
3711 | return 0; | |
3712 | } | |
3713 | ||
c70d7499 | 3714 | /* |
7adf579c | 3715 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
3716 | * 0 if the message should be freed, or -1 if the message should not |
3717 | * be freed or requeued. | |
3718 | */ | |
7adf579c | 3719 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
3720 | struct ipmi_smi_msg *msg) |
3721 | { | |
3722 | int requeue; | |
3723 | int chan; | |
3724 | ||
3725 | #ifdef DEBUG_MSGING | |
3726 | int m; | |
3727 | printk("Recv:"); | |
e8b33617 | 3728 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3729 | printk(" %2.2x", msg->rsp[m]); |
3730 | printk("\n"); | |
3731 | #endif | |
3732 | if (msg->rsp_size < 2) { | |
3733 | /* Message is too small to be correct. */ | |
3734 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3735 | " for netfn %x cmd %x, got %d bytes\n", | |
3736 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3737 | ||
3738 | /* Generate an error response for the message. */ | |
3739 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3740 | msg->rsp[1] = msg->data[1]; | |
3741 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3742 | msg->rsp_size = 3; | |
c70d7499 CM |
3743 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3744 | || (msg->rsp[1] != msg->data[1])) { | |
3745 | /* | |
3746 | * The NetFN and Command in the response is not even | |
3747 | * marginally correct. | |
3748 | */ | |
1da177e4 LT |
3749 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3750 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3751 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3752 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3753 | ||
3754 | /* Generate an error response for the message. */ | |
3755 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3756 | msg->rsp[1] = msg->data[1]; | |
3757 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3758 | msg->rsp_size = 3; | |
3759 | } | |
3760 | ||
3761 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3762 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3763 | && (msg->user_data != NULL)) { |
3764 | /* | |
3765 | * It's a response to a response we sent. For this we | |
3766 | * deliver a send message response to the user. | |
3767 | */ | |
393d2cc3 | 3768 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3769 | |
3770 | requeue = 0; | |
3771 | if (msg->rsp_size < 2) | |
3772 | /* Message is too small to be correct. */ | |
3773 | goto out; | |
3774 | ||
3775 | chan = msg->data[2] & 0x0f; | |
3776 | if (chan >= IPMI_MAX_CHANNELS) | |
3777 | /* Invalid channel number */ | |
3778 | goto out; | |
3779 | ||
393d2cc3 CM |
3780 | if (!recv_msg) |
3781 | goto out; | |
3782 | ||
3783 | /* Make sure the user still exists. */ | |
3784 | if (!recv_msg->user || !recv_msg->user->valid) | |
3785 | goto out; | |
3786 | ||
3787 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3788 | recv_msg->msg.data = recv_msg->msg_data; | |
3789 | recv_msg->msg.data_len = 1; | |
3790 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3791 | deliver_response(recv_msg); | |
1da177e4 | 3792 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3793 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3794 | /* It's from the receive queue. */ |
3795 | chan = msg->rsp[3] & 0xf; | |
3796 | if (chan >= IPMI_MAX_CHANNELS) { | |
3797 | /* Invalid channel number */ | |
3798 | requeue = 0; | |
3799 | goto out; | |
3800 | } | |
3801 | ||
4dec302f | 3802 | /* |
9a2845c4 CM |
3803 | * We need to make sure the channels have been initialized. |
3804 | * The channel_handler routine will set the "curr_channel" | |
3805 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
3806 | * channels for this interface have been initialized. | |
3807 | */ | |
4dec302f | 3808 | if (intf->curr_channel < IPMI_MAX_CHANNELS) { |
9a2845c4 | 3809 | requeue = 0; /* Throw the message away */ |
4dec302f | 3810 | goto out; |
3811 | } | |
3812 | ||
1da177e4 LT |
3813 | switch (intf->channels[chan].medium) { |
3814 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3815 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3816 | /* |
3817 | * It's a response, so find the | |
3818 | * requesting message and send it up. | |
3819 | */ | |
1da177e4 LT |
3820 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3821 | } else { | |
c70d7499 CM |
3822 | /* |
3823 | * It's a command to the SMS from some other | |
3824 | * entity. Handle that. | |
3825 | */ | |
1da177e4 LT |
3826 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3827 | } | |
3828 | break; | |
3829 | ||
3830 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3831 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3832 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3833 | /* |
3834 | * It's a response, so find the | |
3835 | * requesting message and send it up. | |
3836 | */ | |
1da177e4 LT |
3837 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3838 | } else { | |
c70d7499 CM |
3839 | /* |
3840 | * It's a command to the SMS from some other | |
3841 | * entity. Handle that. | |
3842 | */ | |
1da177e4 LT |
3843 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3844 | } | |
3845 | break; | |
3846 | ||
3847 | default: | |
4dec302f | 3848 | /* Check for OEM Channels. Clients had better |
3849 | register for these commands. */ | |
3850 | if ((intf->channels[chan].medium | |
3851 | >= IPMI_CHANNEL_MEDIUM_OEM_MIN) | |
3852 | && (intf->channels[chan].medium | |
3853 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { | |
3854 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
3855 | } else { | |
3856 | /* | |
3857 | * We don't handle the channel type, so just | |
3858 | * free the message. | |
3859 | */ | |
3860 | requeue = 0; | |
3861 | } | |
1da177e4 LT |
3862 | } |
3863 | ||
3864 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3865 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 3866 | /* It's an asynchronous event. */ |
1da177e4 LT |
3867 | requeue = handle_read_event_rsp(intf, msg); |
3868 | } else { | |
3869 | /* It's a response from the local BMC. */ | |
3870 | requeue = handle_bmc_rsp(intf, msg); | |
3871 | } | |
3872 | ||
3873 | out: | |
3874 | return requeue; | |
3875 | } | |
3876 | ||
7adf579c CM |
3877 | /* |
3878 | * If there are messages in the queue or pretimeouts, handle them. | |
3879 | */ | |
3880 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
3881 | { | |
3882 | struct ipmi_smi_msg *smi_msg; | |
3883 | unsigned long flags = 0; | |
3884 | int rv; | |
3885 | int run_to_completion = intf->run_to_completion; | |
3886 | ||
3887 | /* See if any waiting messages need to be processed. */ | |
3888 | if (!run_to_completion) | |
65be7544 CM |
3889 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
3890 | while (!list_empty(&intf->waiting_rcv_msgs)) { | |
3891 | smi_msg = list_entry(intf->waiting_rcv_msgs.next, | |
7adf579c | 3892 | struct ipmi_smi_msg, link); |
ae4ea9a2 | 3893 | list_del(&smi_msg->link); |
7adf579c | 3894 | if (!run_to_completion) |
65be7544 CM |
3895 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, |
3896 | flags); | |
7adf579c CM |
3897 | rv = handle_one_recv_msg(intf, smi_msg); |
3898 | if (!run_to_completion) | |
65be7544 | 3899 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
7ea0ed2b | 3900 | if (rv > 0) { |
7adf579c CM |
3901 | /* |
3902 | * To preserve message order, quit if we | |
ae4ea9a2 JN |
3903 | * can't handle a message. Add the message |
3904 | * back at the head, this is safe because this | |
3905 | * tasklet is the only thing that pulls the | |
3906 | * messages. | |
7adf579c | 3907 | */ |
ae4ea9a2 | 3908 | list_add(&smi_msg->link, &intf->waiting_rcv_msgs); |
7adf579c | 3909 | break; |
7ea0ed2b | 3910 | } else { |
7ea0ed2b CM |
3911 | if (rv == 0) |
3912 | /* Message handled */ | |
3913 | ipmi_free_smi_msg(smi_msg); | |
3914 | /* If rv < 0, fatal error, del but don't free. */ | |
7adf579c CM |
3915 | } |
3916 | } | |
3917 | if (!run_to_completion) | |
65be7544 | 3918 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, flags); |
7adf579c CM |
3919 | |
3920 | /* | |
3921 | * If the pretimout count is non-zero, decrement one from it and | |
3922 | * deliver pretimeouts to all the users. | |
3923 | */ | |
3924 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
3925 | ipmi_user_t user; | |
3926 | ||
3927 | rcu_read_lock(); | |
3928 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3929 | if (user->handler->ipmi_watchdog_pretimeout) | |
3930 | user->handler->ipmi_watchdog_pretimeout( | |
3931 | user->handler_data); | |
3932 | } | |
3933 | rcu_read_unlock(); | |
3934 | } | |
3935 | } | |
3936 | ||
3937 | static void smi_recv_tasklet(unsigned long val) | |
3938 | { | |
7ea0ed2b CM |
3939 | unsigned long flags = 0; /* keep us warning-free. */ |
3940 | ipmi_smi_t intf = (ipmi_smi_t) val; | |
3941 | int run_to_completion = intf->run_to_completion; | |
3942 | struct ipmi_smi_msg *newmsg = NULL; | |
3943 | ||
3944 | /* | |
3945 | * Start the next message if available. | |
3946 | * | |
3947 | * Do this here, not in the actual receiver, because we may deadlock | |
3948 | * because the lower layer is allowed to hold locks while calling | |
3949 | * message delivery. | |
3950 | */ | |
cdea4656 TC |
3951 | |
3952 | rcu_read_lock(); | |
3953 | ||
7ea0ed2b CM |
3954 | if (!run_to_completion) |
3955 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
3956 | if (intf->curr_msg == NULL && !intf->in_shutdown) { | |
3957 | struct list_head *entry = NULL; | |
3958 | ||
3959 | /* Pick the high priority queue first. */ | |
3960 | if (!list_empty(&intf->hp_xmit_msgs)) | |
3961 | entry = intf->hp_xmit_msgs.next; | |
3962 | else if (!list_empty(&intf->xmit_msgs)) | |
3963 | entry = intf->xmit_msgs.next; | |
3964 | ||
3965 | if (entry) { | |
3966 | list_del(entry); | |
3967 | newmsg = list_entry(entry, struct ipmi_smi_msg, link); | |
3968 | intf->curr_msg = newmsg; | |
3969 | } | |
3970 | } | |
3971 | if (!run_to_completion) | |
3972 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
3973 | if (newmsg) | |
99ab32f3 | 3974 | intf->handlers->sender(intf->send_info, newmsg); |
7ea0ed2b | 3975 | |
cdea4656 TC |
3976 | rcu_read_unlock(); |
3977 | ||
7ea0ed2b | 3978 | handle_new_recv_msgs(intf); |
7adf579c CM |
3979 | } |
3980 | ||
1da177e4 LT |
3981 | /* Handle a new message from the lower layer. */ |
3982 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3983 | struct ipmi_smi_msg *msg) | |
3984 | { | |
5956dce1 | 3985 | unsigned long flags = 0; /* keep us warning-free. */ |
7ea0ed2b | 3986 | int run_to_completion = intf->run_to_completion; |
1da177e4 | 3987 | |
1da177e4 LT |
3988 | if ((msg->data_size >= 2) |
3989 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3990 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 | 3991 | && (msg->user_data == NULL)) { |
7ea0ed2b CM |
3992 | |
3993 | if (intf->in_shutdown) | |
3994 | goto free_msg; | |
3995 | ||
c70d7499 CM |
3996 | /* |
3997 | * This is the local response to a command send, start | |
3998 | * the timer for these. The user_data will not be | |
3999 | * NULL if this is a response send, and we will let | |
4000 | * response sends just go through. | |
4001 | */ | |
4002 | ||
4003 | /* | |
4004 | * Check for errors, if we get certain errors (ones | |
4005 | * that mean basically we can try again later), we | |
4006 | * ignore them and start the timer. Otherwise we | |
4007 | * report the error immediately. | |
4008 | */ | |
1da177e4 LT |
4009 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
4010 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
4011 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
4012 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 4013 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
4014 | int chan = msg->rsp[3] & 0xf; |
4015 | ||
4016 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
4017 | if (chan >= IPMI_MAX_CHANNELS) |
4018 | ; /* This shouldn't happen */ | |
4019 | else if ((intf->channels[chan].medium | |
4020 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
4021 | || (intf->channels[chan].medium | |
4022 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 4023 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 4024 | else |
b2655f26 | 4025 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 4026 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 4027 | } else |
1da177e4 LT |
4028 | /* The message was sent, start the timer. */ |
4029 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 | 4030 | |
7ea0ed2b | 4031 | free_msg: |
1da177e4 | 4032 | ipmi_free_smi_msg(msg); |
7ea0ed2b CM |
4033 | } else { |
4034 | /* | |
4035 | * To preserve message order, we keep a queue and deliver from | |
4036 | * a tasklet. | |
4037 | */ | |
4038 | if (!run_to_completion) | |
4039 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); | |
4040 | list_add_tail(&msg->link, &intf->waiting_rcv_msgs); | |
4041 | if (!run_to_completion) | |
4042 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, | |
4043 | flags); | |
1da177e4 LT |
4044 | } |
4045 | ||
5956dce1 | 4046 | if (!run_to_completion) |
7ea0ed2b | 4047 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); |
b2234ee9 CM |
4048 | /* |
4049 | * We can get an asynchronous event or receive message in addition | |
4050 | * to commands we send. | |
4051 | */ | |
7ea0ed2b CM |
4052 | if (msg == intf->curr_msg) |
4053 | intf->curr_msg = NULL; | |
5956dce1 | 4054 | if (!run_to_completion) |
7ea0ed2b | 4055 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
c70d7499 | 4056 | |
7ea0ed2b CM |
4057 | if (run_to_completion) |
4058 | smi_recv_tasklet((unsigned long) intf); | |
4059 | else | |
4060 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4061 | } |
c70d7499 | 4062 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
4063 | |
4064 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
4065 | { | |
7ea0ed2b CM |
4066 | if (intf->in_shutdown) |
4067 | return; | |
4068 | ||
7adf579c CM |
4069 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
4070 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4071 | } |
c70d7499 | 4072 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 4073 | |
882fe011 CM |
4074 | static struct ipmi_smi_msg * |
4075 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
4076 | unsigned char seq, long seqid) | |
1da177e4 | 4077 | { |
882fe011 | 4078 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 4079 | if (!smi_msg) |
c70d7499 CM |
4080 | /* |
4081 | * If we can't allocate the message, then just return, we | |
4082 | * get 4 retries, so this should be ok. | |
4083 | */ | |
882fe011 | 4084 | return NULL; |
1da177e4 LT |
4085 | |
4086 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
4087 | smi_msg->data_size = recv_msg->msg.data_len; | |
4088 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 4089 | |
1da177e4 LT |
4090 | #ifdef DEBUG_MSGING |
4091 | { | |
4092 | int m; | |
4093 | printk("Resend: "); | |
e8b33617 | 4094 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4095 | printk(" %2.2x", smi_msg->data[m]); |
4096 | printk("\n"); | |
4097 | } | |
4098 | #endif | |
882fe011 | 4099 | return smi_msg; |
1da177e4 LT |
4100 | } |
4101 | ||
393d2cc3 | 4102 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
392a17b1 CM |
4103 | struct list_head *timeouts, |
4104 | unsigned long timeout_period, | |
89986496 CM |
4105 | int slot, unsigned long *flags, |
4106 | unsigned int *waiting_msgs) | |
393d2cc3 | 4107 | { |
b2c03941 | 4108 | struct ipmi_recv_msg *msg; |
81d02b7f | 4109 | const struct ipmi_smi_handlers *handlers; |
b2c03941 | 4110 | |
7ea0ed2b | 4111 | if (intf->in_shutdown) |
b2c03941 | 4112 | return; |
393d2cc3 CM |
4113 | |
4114 | if (!ent->inuse) | |
4115 | return; | |
4116 | ||
392a17b1 CM |
4117 | if (timeout_period < ent->timeout) { |
4118 | ent->timeout -= timeout_period; | |
89986496 | 4119 | (*waiting_msgs)++; |
393d2cc3 | 4120 | return; |
89986496 | 4121 | } |
393d2cc3 CM |
4122 | |
4123 | if (ent->retries_left == 0) { | |
4124 | /* The message has used all its retries. */ | |
4125 | ent->inuse = 0; | |
4126 | msg = ent->recv_msg; | |
4127 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4128 | if (ent->broadcast) |
b2655f26 | 4129 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4130 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4131 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4132 | else |
b2655f26 | 4133 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4134 | } else { |
4135 | struct ipmi_smi_msg *smi_msg; | |
4136 | /* More retries, send again. */ | |
4137 | ||
89986496 CM |
4138 | (*waiting_msgs)++; |
4139 | ||
c70d7499 CM |
4140 | /* |
4141 | * Start with the max timer, set to normal timer after | |
4142 | * the message is sent. | |
4143 | */ | |
393d2cc3 CM |
4144 | ent->timeout = MAX_MSG_TIMEOUT; |
4145 | ent->retries_left--; | |
393d2cc3 CM |
4146 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4147 | ent->seqid); | |
25176ed6 CM |
4148 | if (!smi_msg) { |
4149 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4150 | ipmi_inc_stat(intf, | |
4151 | dropped_rexmit_lan_commands); | |
4152 | else | |
4153 | ipmi_inc_stat(intf, | |
4154 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4155 | return; |
25176ed6 | 4156 | } |
393d2cc3 CM |
4157 | |
4158 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4159 | |
c70d7499 CM |
4160 | /* |
4161 | * Send the new message. We send with a zero | |
4162 | * priority. It timed out, I doubt time is that | |
4163 | * critical now, and high priority messages are really | |
4164 | * only for messages to the local MC, which don't get | |
4165 | * resent. | |
4166 | */ | |
b2c03941 | 4167 | handlers = intf->handlers; |
25176ed6 CM |
4168 | if (handlers) { |
4169 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4170 | ipmi_inc_stat(intf, | |
4171 | retransmitted_lan_commands); | |
4172 | else | |
4173 | ipmi_inc_stat(intf, | |
4174 | retransmitted_ipmb_commands); | |
4175 | ||
81d02b7f | 4176 | smi_send(intf, handlers, smi_msg, 0); |
25176ed6 | 4177 | } else |
b2c03941 CM |
4178 | ipmi_free_smi_msg(smi_msg); |
4179 | ||
393d2cc3 CM |
4180 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4181 | } | |
4182 | } | |
4183 | ||
392a17b1 CM |
4184 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, |
4185 | unsigned long timeout_period) | |
1da177e4 | 4186 | { |
1da177e4 LT |
4187 | struct list_head timeouts; |
4188 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4189 | unsigned long flags; |
bca0324d | 4190 | int i; |
89986496 | 4191 | unsigned int waiting_msgs = 0; |
1da177e4 | 4192 | |
89986496 CM |
4193 | /* |
4194 | * Go through the seq table and find any messages that | |
4195 | * have timed out, putting them in the timeouts | |
4196 | * list. | |
4197 | */ | |
4198 | INIT_LIST_HEAD(&timeouts); | |
4199 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4200 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4201 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4202 | &timeouts, timeout_period, i, | |
4203 | &flags, &waiting_msgs); | |
4204 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4205 | |
89986496 CM |
4206 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4207 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4208 | |
89986496 CM |
4209 | /* |
4210 | * Maintenance mode handling. Check the timeout | |
4211 | * optimistically before we claim the lock. It may | |
4212 | * mean a timeout gets missed occasionally, but that | |
4213 | * only means the timeout gets extended by one period | |
4214 | * in that case. No big deal, and it avoids the lock | |
4215 | * most of the time. | |
4216 | */ | |
4217 | if (intf->auto_maintenance_timeout > 0) { | |
4218 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4219 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4220 | intf->auto_maintenance_timeout |
4221 | -= timeout_period; | |
4222 | if (!intf->maintenance_mode | |
4223 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4224 | intf->maintenance_mode_enable = false; |
89986496 | 4225 | maintenance_mode_update(intf); |
b9675136 | 4226 | } |
b9675136 | 4227 | } |
89986496 CM |
4228 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4229 | flags); | |
1da177e4 | 4230 | } |
89986496 CM |
4231 | |
4232 | tasklet_schedule(&intf->recv_tasklet); | |
4233 | ||
4234 | return waiting_msgs; | |
1da177e4 LT |
4235 | } |
4236 | ||
89986496 | 4237 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4238 | { |
89986496 CM |
4239 | /* No event requests when in maintenance mode. */ |
4240 | if (intf->maintenance_mode_enable) | |
4241 | return; | |
b9675136 | 4242 | |
7ea0ed2b CM |
4243 | if (!intf->in_shutdown) |
4244 | intf->handlers->request_events(intf->send_info); | |
1da177e4 LT |
4245 | } |
4246 | ||
4247 | static struct timer_list ipmi_timer; | |
4248 | ||
8f43f84f | 4249 | static atomic_t stop_operation; |
1da177e4 LT |
4250 | |
4251 | static void ipmi_timeout(unsigned long data) | |
4252 | { | |
89986496 CM |
4253 | ipmi_smi_t intf; |
4254 | int nt = 0; | |
4255 | ||
8f43f84f | 4256 | if (atomic_read(&stop_operation)) |
1da177e4 | 4257 | return; |
1da177e4 | 4258 | |
89986496 CM |
4259 | rcu_read_lock(); |
4260 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4261 | int lnt = 0; | |
4262 | ||
4263 | if (atomic_read(&intf->event_waiters)) { | |
4264 | intf->ticks_to_req_ev--; | |
4265 | if (intf->ticks_to_req_ev == 0) { | |
4266 | ipmi_request_event(intf); | |
4267 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4268 | } | |
4269 | lnt++; | |
4270 | } | |
4271 | ||
4272 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4273 | |
89986496 CM |
4274 | lnt = !!lnt; |
4275 | if (lnt != intf->last_needs_timer && | |
4276 | intf->handlers->set_need_watch) | |
4277 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4278 | intf->last_needs_timer = lnt; | |
1da177e4 | 4279 | |
89986496 CM |
4280 | nt += lnt; |
4281 | } | |
4282 | rcu_read_unlock(); | |
4283 | ||
4284 | if (nt) | |
4285 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4286 | } |
4287 | ||
89986496 CM |
4288 | static void need_waiter(ipmi_smi_t intf) |
4289 | { | |
4290 | /* Racy, but worst case we start the timer twice. */ | |
4291 | if (!timer_pending(&ipmi_timer)) | |
4292 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4293 | } | |
1da177e4 LT |
4294 | |
4295 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4296 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4297 | ||
1da177e4 LT |
4298 | static void free_smi_msg(struct ipmi_smi_msg *msg) |
4299 | { | |
4300 | atomic_dec(&smi_msg_inuse_count); | |
4301 | kfree(msg); | |
4302 | } | |
4303 | ||
4304 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4305 | { | |
4306 | struct ipmi_smi_msg *rv; | |
4307 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4308 | if (rv) { | |
4309 | rv->done = free_smi_msg; | |
4310 | rv->user_data = NULL; | |
4311 | atomic_inc(&smi_msg_inuse_count); | |
4312 | } | |
4313 | return rv; | |
4314 | } | |
c70d7499 | 4315 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4316 | |
4317 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4318 | { | |
4319 | atomic_dec(&recv_msg_inuse_count); | |
4320 | kfree(msg); | |
4321 | } | |
4322 | ||
74006309 | 4323 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4324 | { |
4325 | struct ipmi_recv_msg *rv; | |
4326 | ||
4327 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4328 | if (rv) { | |
a9eec556 | 4329 | rv->user = NULL; |
1da177e4 LT |
4330 | rv->done = free_recv_msg; |
4331 | atomic_inc(&recv_msg_inuse_count); | |
4332 | } | |
4333 | return rv; | |
4334 | } | |
4335 | ||
393d2cc3 CM |
4336 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4337 | { | |
4338 | if (msg->user) | |
4339 | kref_put(&msg->user->refcount, free_user); | |
4340 | msg->done(msg); | |
4341 | } | |
c70d7499 | 4342 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4343 | |
895dcfd1 CM |
4344 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4345 | ||
1da177e4 LT |
4346 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4347 | { | |
895dcfd1 | 4348 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4349 | } |
4350 | ||
4351 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4352 | { | |
895dcfd1 CM |
4353 | atomic_dec(&panic_done_count); |
4354 | } | |
4355 | ||
4356 | /* | |
4357 | * Inside a panic, send a message and wait for a response. | |
4358 | */ | |
4359 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4360 | struct ipmi_addr *addr, | |
4361 | struct kernel_ipmi_msg *msg) | |
4362 | { | |
4363 | struct ipmi_smi_msg smi_msg; | |
4364 | struct ipmi_recv_msg recv_msg; | |
4365 | int rv; | |
4366 | ||
4367 | smi_msg.done = dummy_smi_done_handler; | |
4368 | recv_msg.done = dummy_recv_done_handler; | |
4369 | atomic_add(2, &panic_done_count); | |
4370 | rv = i_ipmi_request(NULL, | |
4371 | intf, | |
4372 | addr, | |
4373 | 0, | |
4374 | msg, | |
4375 | intf, | |
4376 | &smi_msg, | |
4377 | &recv_msg, | |
4378 | 0, | |
4379 | intf->channels[0].address, | |
4380 | intf->channels[0].lun, | |
4381 | 0, 1); /* Don't retry, and don't wait. */ | |
4382 | if (rv) | |
4383 | atomic_sub(2, &panic_done_count); | |
82802f96 HK |
4384 | else if (intf->handlers->flush_messages) |
4385 | intf->handlers->flush_messages(intf->send_info); | |
4386 | ||
895dcfd1 CM |
4387 | while (atomic_read(&panic_done_count) != 0) |
4388 | ipmi_poll(intf); | |
1da177e4 LT |
4389 | } |
4390 | ||
56a55ec6 | 4391 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4392 | { |
56a55ec6 CM |
4393 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4394 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4395 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4396 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4397 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4398 | intf->event_receiver = msg->msg.data[1]; |
4399 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4400 | } |
4401 | } | |
4402 | ||
56a55ec6 | 4403 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4404 | { |
56a55ec6 CM |
4405 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4406 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4407 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4408 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4409 | /* | |
4410 | * A get device id command, save if we are an event | |
4411 | * receiver or generator. | |
4412 | */ | |
56a55ec6 CM |
4413 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4414 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4415 | } |
4416 | } | |
1da177e4 LT |
4417 | |
4418 | static void send_panic_events(char *str) | |
4419 | { | |
4420 | struct kernel_ipmi_msg msg; | |
4421 | ipmi_smi_t intf; | |
4422 | unsigned char data[16]; | |
1da177e4 LT |
4423 | struct ipmi_system_interface_addr *si; |
4424 | struct ipmi_addr addr; | |
1da177e4 | 4425 | |
1c9f98d1 CM |
4426 | if (ipmi_send_panic_event == IPMI_SEND_PANIC_EVENT_NONE) |
4427 | return; | |
4428 | ||
1da177e4 LT |
4429 | si = (struct ipmi_system_interface_addr *) &addr; |
4430 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4431 | si->channel = IPMI_BMC_CHANNEL; | |
4432 | si->lun = 0; | |
4433 | ||
4434 | /* Fill in an event telling that we have failed. */ | |
4435 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4436 | msg.cmd = 2; /* Platform event command. */ | |
4437 | msg.data = data; | |
4438 | msg.data_len = 8; | |
cda315ab | 4439 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4440 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4441 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4442 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4443 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4444 | ||
c70d7499 CM |
4445 | /* |
4446 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4447 | * to make the panic events more useful. | |
4448 | */ | |
1da177e4 LT |
4449 | if (str) { |
4450 | data[3] = str[0]; | |
4451 | data[6] = str[1]; | |
4452 | data[7] = str[2]; | |
4453 | } | |
4454 | ||
1da177e4 | 4455 | /* For every registered interface, send the event. */ |
bca0324d | 4456 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1c9f98d1 CM |
4457 | if (!intf->handlers || !intf->handlers->poll) |
4458 | /* Interface is not ready or can't run at panic time. */ | |
1da177e4 LT |
4459 | continue; |
4460 | ||
4461 | /* Send the event announcing the panic. */ | |
895dcfd1 | 4462 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4463 | } |
4464 | ||
c70d7499 CM |
4465 | /* |
4466 | * On every interface, dump a bunch of OEM event holding the | |
4467 | * string. | |
4468 | */ | |
1c9f98d1 | 4469 | if (ipmi_send_panic_event != IPMI_SEND_PANIC_EVENT_STRING || !str) |
1da177e4 LT |
4470 | return; |
4471 | ||
bca0324d CM |
4472 | /* For every registered interface, send the event. */ |
4473 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4474 | char *p = str; |
4475 | struct ipmi_ipmb_addr *ipmb; | |
4476 | int j; | |
4477 | ||
bca0324d CM |
4478 | if (intf->intf_num == -1) |
4479 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4480 | continue; |
4481 | ||
78ba2faf CM |
4482 | /* |
4483 | * intf_num is used as an marker to tell if the | |
4484 | * interface is valid. Thus we need a read barrier to | |
4485 | * make sure data fetched before checking intf_num | |
4486 | * won't be used. | |
4487 | */ | |
4488 | smp_rmb(); | |
4489 | ||
c70d7499 CM |
4490 | /* |
4491 | * First job here is to figure out where to send the | |
4492 | * OEM events. There's no way in IPMI to send OEM | |
4493 | * events using an event send command, so we have to | |
4494 | * find the SEL to put them in and stick them in | |
4495 | * there. | |
4496 | */ | |
1da177e4 LT |
4497 | |
4498 | /* Get capabilities from the get device id. */ | |
4499 | intf->local_sel_device = 0; | |
4500 | intf->local_event_generator = 0; | |
4501 | intf->event_receiver = 0; | |
4502 | ||
4503 | /* Request the device info from the local MC. */ | |
4504 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4505 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4506 | msg.data = NULL; | |
4507 | msg.data_len = 0; | |
4508 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 4509 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4510 | |
4511 | if (intf->local_event_generator) { | |
4512 | /* Request the event receiver from the local MC. */ | |
4513 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4514 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4515 | msg.data = NULL; | |
4516 | msg.data_len = 0; | |
4517 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 4518 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4519 | } |
4520 | intf->null_user_handler = NULL; | |
4521 | ||
c70d7499 CM |
4522 | /* |
4523 | * Validate the event receiver. The low bit must not | |
4524 | * be 1 (it must be a valid IPMB address), it cannot | |
4525 | * be zero, and it must not be my address. | |
4526 | */ | |
4527 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4528 | && (intf->event_receiver != 0) |
c70d7499 CM |
4529 | && (intf->event_receiver != intf->channels[0].address)) { |
4530 | /* | |
4531 | * The event receiver is valid, send an IPMB | |
4532 | * message. | |
4533 | */ | |
1da177e4 LT |
4534 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4535 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4536 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4537 | ipmb->lun = intf->event_receiver_lun; | |
4538 | ipmb->slave_addr = intf->event_receiver; | |
4539 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4540 | /* |
4541 | * The event receiver was not valid (or was | |
4542 | * me), but I am an SEL device, just dump it | |
4543 | * in my SEL. | |
4544 | */ | |
1da177e4 LT |
4545 | si = (struct ipmi_system_interface_addr *) &addr; |
4546 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4547 | si->channel = IPMI_BMC_CHANNEL; | |
4548 | si->lun = 0; | |
4549 | } else | |
4550 | continue; /* No where to send the event. */ | |
4551 | ||
1da177e4 LT |
4552 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4553 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4554 | msg.data = data; | |
4555 | msg.data_len = 16; | |
4556 | ||
4557 | j = 0; | |
4558 | while (*p) { | |
4559 | int size = strlen(p); | |
4560 | ||
4561 | if (size > 11) | |
4562 | size = 11; | |
4563 | data[0] = 0; | |
4564 | data[1] = 0; | |
4565 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4566 | data[3] = intf->channels[0].address; |
1da177e4 | 4567 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4568 | /* |
4569 | * Always give 11 bytes, so strncpy will fill | |
4570 | * it with zeroes for me. | |
4571 | */ | |
1da177e4 LT |
4572 | strncpy(data+5, p, 11); |
4573 | p += size; | |
4574 | ||
895dcfd1 | 4575 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 4576 | } |
c70d7499 | 4577 | } |
1da177e4 | 4578 | } |
1da177e4 | 4579 | |
0c8204b3 | 4580 | static int has_panicked; |
1da177e4 LT |
4581 | |
4582 | static int panic_event(struct notifier_block *this, | |
4583 | unsigned long event, | |
c70d7499 | 4584 | void *ptr) |
1da177e4 | 4585 | { |
1da177e4 LT |
4586 | ipmi_smi_t intf; |
4587 | ||
f18190bd | 4588 | if (has_panicked) |
1da177e4 | 4589 | return NOTIFY_DONE; |
f18190bd | 4590 | has_panicked = 1; |
1da177e4 LT |
4591 | |
4592 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4593 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4594 | if (!intf->handlers) |
4595 | /* Interface is not ready. */ | |
1da177e4 LT |
4596 | continue; |
4597 | ||
06e5e345 HK |
4598 | /* |
4599 | * If we were interrupted while locking xmit_msgs_lock or | |
4600 | * waiting_rcv_msgs_lock, the corresponding list may be | |
4601 | * corrupted. In this case, drop items on the list for | |
4602 | * the safety. | |
4603 | */ | |
4604 | if (!spin_trylock(&intf->xmit_msgs_lock)) { | |
4605 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
4606 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
4607 | } else | |
4608 | spin_unlock(&intf->xmit_msgs_lock); | |
4609 | ||
4610 | if (!spin_trylock(&intf->waiting_rcv_msgs_lock)) | |
4611 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
4612 | else | |
4613 | spin_unlock(&intf->waiting_rcv_msgs_lock); | |
4614 | ||
5956dce1 | 4615 | intf->run_to_completion = 1; |
1c9f98d1 CM |
4616 | if (intf->handlers->set_run_to_completion) |
4617 | intf->handlers->set_run_to_completion(intf->send_info, | |
4618 | 1); | |
1da177e4 LT |
4619 | } |
4620 | ||
1da177e4 | 4621 | send_panic_events(ptr); |
1da177e4 LT |
4622 | |
4623 | return NOTIFY_DONE; | |
4624 | } | |
4625 | ||
4626 | static struct notifier_block panic_block = { | |
4627 | .notifier_call = panic_event, | |
4628 | .next = NULL, | |
4629 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4630 | }; | |
4631 | ||
4632 | static int ipmi_init_msghandler(void) | |
4633 | { | |
50c812b2 | 4634 | int rv; |
1da177e4 LT |
4635 | |
4636 | if (initialized) | |
4637 | return 0; | |
4638 | ||
fe2d5ffc | 4639 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4640 | if (rv) { |
4641 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4642 | return rv; | |
4643 | } | |
4644 | ||
1da177e4 | 4645 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4646 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4647 | |
3b625943 | 4648 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4649 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4650 | if (!proc_ipmi_root) { | |
4651 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
80fad5b9 | 4652 | driver_unregister(&ipmidriver.driver); |
1da177e4 LT |
4653 | return -ENOMEM; |
4654 | } | |
4655 | ||
3b625943 | 4656 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4657 | |
409035e0 CM |
4658 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4659 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4660 | |
e041c683 | 4661 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4662 | |
4663 | initialized = 1; | |
4664 | ||
4665 | return 0; | |
4666 | } | |
4667 | ||
60ee6d5f | 4668 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
4669 | { |
4670 | ipmi_init_msghandler(); | |
4671 | return 0; | |
4672 | } | |
4673 | ||
60ee6d5f | 4674 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
4675 | { |
4676 | int count; | |
4677 | ||
4678 | if (!initialized) | |
4679 | return; | |
4680 | ||
e041c683 | 4681 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4682 | |
c70d7499 CM |
4683 | /* |
4684 | * This can't be called if any interfaces exist, so no worry | |
4685 | * about shutting down the interfaces. | |
4686 | */ | |
1da177e4 | 4687 | |
c70d7499 CM |
4688 | /* |
4689 | * Tell the timer to stop, then wait for it to stop. This | |
4690 | * avoids problems with race conditions removing the timer | |
4691 | * here. | |
4692 | */ | |
8f43f84f CM |
4693 | atomic_inc(&stop_operation); |
4694 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4695 | |
3b625943 | 4696 | #ifdef CONFIG_PROC_FS |
a8ca16ea | 4697 | proc_remove(proc_ipmi_root); |
3b625943 | 4698 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4699 | |
fe2d5ffc | 4700 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4701 | |
1da177e4 LT |
4702 | initialized = 0; |
4703 | ||
4704 | /* Check for buffer leaks. */ | |
4705 | count = atomic_read(&smi_msg_inuse_count); | |
4706 | if (count != 0) | |
4707 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4708 | count); | |
4709 | count = atomic_read(&recv_msg_inuse_count); | |
4710 | if (count != 0) | |
4711 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4712 | count); | |
4713 | } | |
4714 | module_exit(cleanup_ipmi); | |
4715 | ||
4716 | module_init(ipmi_init_msghandler_mod); | |
4717 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4718 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4719 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4720 | " interface."); | |
1fdd75bd | 4721 | MODULE_VERSION(IPMI_DRIVER_VERSION); |
070cbd1d | 4722 | MODULE_SOFTDEP("post: ipmi_devintf"); |