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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 | 406 | struct bmc_device *bmc; |
a2cb600f | 407 | bool bmc_registered; |
50c812b2 | 408 | char *my_dev_name; |
1da177e4 | 409 | |
c70d7499 CM |
410 | /* |
411 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
412 | * must either be holding the ipmi_interfaces_mutex or be in |
413 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
414 | * value into a local variable and make sure it is not NULL. |
415 | */ | |
81d02b7f | 416 | const struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
417 | void *send_info; |
418 | ||
3b625943 | 419 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
420 | /* A list of proc entries for this interface. */ |
421 | struct mutex proc_entry_lock; | |
1da177e4 | 422 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 423 | #endif |
1da177e4 | 424 | |
50c812b2 CM |
425 | /* Driver-model device for the system interface. */ |
426 | struct device *si_dev; | |
427 | ||
c70d7499 CM |
428 | /* |
429 | * A table of sequence numbers for this interface. We use the | |
430 | * sequence numbers for IPMB messages that go out of the | |
431 | * interface to match them up with their responses. A routine | |
432 | * is called periodically to time the items in this list. | |
433 | */ | |
1da177e4 LT |
434 | spinlock_t seq_lock; |
435 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
436 | int curr_seq; | |
437 | ||
c70d7499 | 438 | /* |
7adf579c CM |
439 | * Messages queued for delivery. If delivery fails (out of memory |
440 | * for instance), They will stay in here to be processed later in a | |
441 | * periodic timer interrupt. The tasklet is for handling received | |
442 | * messages directly from the handler. | |
c70d7499 | 443 | */ |
65be7544 CM |
444 | spinlock_t waiting_rcv_msgs_lock; |
445 | struct list_head waiting_rcv_msgs; | |
7adf579c CM |
446 | atomic_t watchdog_pretimeouts_to_deliver; |
447 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 448 | |
7ea0ed2b CM |
449 | spinlock_t xmit_msgs_lock; |
450 | struct list_head xmit_msgs; | |
451 | struct ipmi_smi_msg *curr_msg; | |
452 | struct list_head hp_xmit_msgs; | |
453 | ||
c70d7499 CM |
454 | /* |
455 | * The list of command receivers that are registered for commands | |
456 | * on this interface. | |
457 | */ | |
d6dfd131 | 458 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
459 | struct list_head cmd_rcvrs; |
460 | ||
c70d7499 CM |
461 | /* |
462 | * Events that were queues because no one was there to receive | |
463 | * them. | |
464 | */ | |
1da177e4 LT |
465 | spinlock_t events_lock; /* For dealing with event stuff. */ |
466 | struct list_head waiting_events; | |
467 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
468 | char delivering_events; |
469 | char event_msg_printed; | |
89986496 CM |
470 | atomic_t event_waiters; |
471 | unsigned int ticks_to_req_ev; | |
472 | int last_needs_timer; | |
1da177e4 | 473 | |
c70d7499 CM |
474 | /* |
475 | * The event receiver for my BMC, only really used at panic | |
476 | * shutdown as a place to store this. | |
477 | */ | |
1da177e4 LT |
478 | unsigned char event_receiver; |
479 | unsigned char event_receiver_lun; | |
480 | unsigned char local_sel_device; | |
481 | unsigned char local_event_generator; | |
482 | ||
b9675136 CM |
483 | /* For handling of maintenance mode. */ |
484 | int maintenance_mode; | |
7aefac26 | 485 | bool maintenance_mode_enable; |
b9675136 CM |
486 | int auto_maintenance_timeout; |
487 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
488 | ||
c70d7499 CM |
489 | /* |
490 | * A cheap hack, if this is non-null and a message to an | |
491 | * interface comes in with a NULL user, call this routine with | |
492 | * it. Note that the message will still be freed by the | |
493 | * caller. This only works on the system interface. | |
494 | */ | |
56a55ec6 | 495 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 496 | |
c70d7499 CM |
497 | /* |
498 | * When we are scanning the channels for an SMI, this will | |
499 | * tell which channel we are scanning. | |
500 | */ | |
1da177e4 LT |
501 | int curr_channel; |
502 | ||
503 | /* Channel information */ | |
504 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
505 | ||
506 | /* Proc FS stuff. */ | |
507 | struct proc_dir_entry *proc_dir; | |
508 | char proc_dir_name[10]; | |
509 | ||
b2655f26 | 510 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
511 | |
512 | /* | |
513 | * run_to_completion duplicate of smb_info, smi_info | |
514 | * and ipmi_serial_info structures. Used to decrease numbers of | |
515 | * parameters passed by "low" level IPMI code. | |
516 | */ | |
517 | int run_to_completion; | |
1da177e4 | 518 | }; |
50c812b2 | 519 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 520 | |
50c812b2 CM |
521 | /** |
522 | * The driver model view of the IPMI messaging driver. | |
523 | */ | |
fe2d5ffc DW |
524 | static struct platform_driver ipmidriver = { |
525 | .driver = { | |
526 | .name = "ipmi", | |
527 | .bus = &platform_bus_type | |
528 | } | |
50c812b2 | 529 | }; |
9ca15af3 CM |
530 | /* |
531 | * This mutex protects adding/removing BMCs on the ipmidriver's device | |
532 | * list. This way we can pull items out of the driver's list and reuse | |
533 | * them. | |
534 | */ | |
50c812b2 CM |
535 | static DEFINE_MUTEX(ipmidriver_mutex); |
536 | ||
bed9759b | 537 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 538 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 539 | |
c70d7499 CM |
540 | /* |
541 | * List of watchers that want to know when smi's are added and deleted. | |
542 | */ | |
bed9759b | 543 | static LIST_HEAD(smi_watchers); |
b2c03941 | 544 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 545 | |
b2655f26 KB |
546 | #define ipmi_inc_stat(intf, stat) \ |
547 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
548 | #define ipmi_get_stat(intf, stat) \ | |
549 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
550 | ||
99ee6735 LC |
551 | static const char * const addr_src_to_str[] = { |
552 | "invalid", "hotmod", "hardcoded", "SPMI", "ACPI", "SMBIOS", "PCI", | |
b07b58a3 | 553 | "device-tree" |
99ee6735 | 554 | }; |
7e50387b CM |
555 | |
556 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src) | |
557 | { | |
b07b58a3 | 558 | if (src >= SI_LAST) |
7e50387b CM |
559 | src = 0; /* Invalid */ |
560 | return addr_src_to_str[src]; | |
561 | } | |
562 | EXPORT_SYMBOL(ipmi_addr_src_to_str); | |
563 | ||
25176ed6 CM |
564 | static int is_lan_addr(struct ipmi_addr *addr) |
565 | { | |
566 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
567 | } | |
568 | ||
569 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
570 | { | |
571 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
572 | } | |
573 | ||
574 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
575 | { | |
576 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
577 | } | |
b2655f26 | 578 | |
393d2cc3 CM |
579 | static void free_recv_msg_list(struct list_head *q) |
580 | { | |
581 | struct ipmi_recv_msg *msg, *msg2; | |
582 | ||
583 | list_for_each_entry_safe(msg, msg2, q, link) { | |
584 | list_del(&msg->link); | |
585 | ipmi_free_recv_msg(msg); | |
586 | } | |
587 | } | |
588 | ||
f3ce6a0e CM |
589 | static void free_smi_msg_list(struct list_head *q) |
590 | { | |
591 | struct ipmi_smi_msg *msg, *msg2; | |
592 | ||
593 | list_for_each_entry_safe(msg, msg2, q, link) { | |
594 | list_del(&msg->link); | |
595 | ipmi_free_smi_msg(msg); | |
596 | } | |
597 | } | |
598 | ||
393d2cc3 CM |
599 | static void clean_up_interface_data(ipmi_smi_t intf) |
600 | { | |
601 | int i; | |
602 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
603 | struct list_head list; |
604 | ||
7adf579c CM |
605 | tasklet_kill(&intf->recv_tasklet); |
606 | ||
65be7544 | 607 | free_smi_msg_list(&intf->waiting_rcv_msgs); |
393d2cc3 CM |
608 | free_recv_msg_list(&intf->waiting_events); |
609 | ||
78ba2faf CM |
610 | /* |
611 | * Wholesale remove all the entries from the list in the | |
612 | * interface and wait for RCU to know that none are in use. | |
613 | */ | |
d6dfd131 | 614 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
615 | INIT_LIST_HEAD(&list); |
616 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 617 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
618 | |
619 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
620 | kfree(rcvr); | |
621 | ||
622 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
623 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 624 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 625 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
626 | } |
627 | } | |
628 | ||
629 | static void intf_free(struct kref *ref) | |
630 | { | |
631 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
632 | ||
633 | clean_up_interface_data(intf); | |
634 | kfree(intf); | |
635 | } | |
636 | ||
bca0324d | 637 | struct watcher_entry { |
b2c03941 CM |
638 | int intf_num; |
639 | ipmi_smi_t intf; | |
bca0324d | 640 | struct list_head link; |
bca0324d CM |
641 | }; |
642 | ||
1da177e4 LT |
643 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
644 | { | |
bca0324d | 645 | ipmi_smi_t intf; |
e381d1c4 | 646 | LIST_HEAD(to_deliver); |
bca0324d CM |
647 | struct watcher_entry *e, *e2; |
648 | ||
b2c03941 CM |
649 | mutex_lock(&smi_watchers_mutex); |
650 | ||
bca0324d CM |
651 | mutex_lock(&ipmi_interfaces_mutex); |
652 | ||
b2c03941 | 653 | /* Build a list of things to deliver. */ |
78ba2faf | 654 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
655 | if (intf->intf_num == -1) |
656 | continue; | |
657 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
658 | if (!e) | |
659 | goto out_err; | |
b2c03941 CM |
660 | kref_get(&intf->refcount); |
661 | e->intf = intf; | |
bca0324d CM |
662 | e->intf_num = intf->intf_num; |
663 | list_add_tail(&e->link, &to_deliver); | |
664 | } | |
1da177e4 | 665 | |
b2c03941 CM |
666 | /* We will succeed, so add it to the list. */ |
667 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
668 | |
669 | mutex_unlock(&ipmi_interfaces_mutex); | |
670 | ||
671 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
672 | list_del(&e->link); | |
b2c03941 CM |
673 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
674 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 675 | kfree(e); |
1da177e4 | 676 | } |
bca0324d | 677 | |
b2c03941 | 678 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 679 | |
1da177e4 | 680 | return 0; |
bca0324d CM |
681 | |
682 | out_err: | |
b2c03941 CM |
683 | mutex_unlock(&ipmi_interfaces_mutex); |
684 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
685 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
686 | list_del(&e->link); | |
b2c03941 | 687 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
688 | kfree(e); |
689 | } | |
690 | return -ENOMEM; | |
1da177e4 | 691 | } |
c70d7499 | 692 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
693 | |
694 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
695 | { | |
b2c03941 | 696 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 697 | list_del(&(watcher->link)); |
b2c03941 | 698 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
699 | return 0; |
700 | } | |
c70d7499 | 701 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 702 | |
b2c03941 CM |
703 | /* |
704 | * Must be called with smi_watchers_mutex held. | |
705 | */ | |
1da177e4 | 706 | static void |
50c812b2 | 707 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
708 | { |
709 | struct ipmi_smi_watcher *w; | |
710 | ||
1da177e4 LT |
711 | list_for_each_entry(w, &smi_watchers, link) { |
712 | if (try_module_get(w->owner)) { | |
50c812b2 | 713 | w->new_smi(i, dev); |
1da177e4 LT |
714 | module_put(w->owner); |
715 | } | |
716 | } | |
1da177e4 LT |
717 | } |
718 | ||
719 | static int | |
720 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
721 | { | |
722 | if (addr1->addr_type != addr2->addr_type) | |
723 | return 0; | |
724 | ||
725 | if (addr1->channel != addr2->channel) | |
726 | return 0; | |
727 | ||
728 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
729 | struct ipmi_system_interface_addr *smi_addr1 | |
730 | = (struct ipmi_system_interface_addr *) addr1; | |
731 | struct ipmi_system_interface_addr *smi_addr2 | |
732 | = (struct ipmi_system_interface_addr *) addr2; | |
733 | return (smi_addr1->lun == smi_addr2->lun); | |
734 | } | |
735 | ||
25176ed6 | 736 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
737 | struct ipmi_ipmb_addr *ipmb_addr1 |
738 | = (struct ipmi_ipmb_addr *) addr1; | |
739 | struct ipmi_ipmb_addr *ipmb_addr2 | |
740 | = (struct ipmi_ipmb_addr *) addr2; | |
741 | ||
742 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
743 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
744 | } | |
745 | ||
25176ed6 | 746 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
747 | struct ipmi_lan_addr *lan_addr1 |
748 | = (struct ipmi_lan_addr *) addr1; | |
749 | struct ipmi_lan_addr *lan_addr2 | |
750 | = (struct ipmi_lan_addr *) addr2; | |
751 | ||
752 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
753 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
754 | && (lan_addr1->session_handle | |
755 | == lan_addr2->session_handle) | |
756 | && (lan_addr1->lun == lan_addr2->lun)); | |
757 | } | |
758 | ||
759 | return 1; | |
760 | } | |
761 | ||
762 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
763 | { | |
c70d7499 | 764 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 765 | return -EINVAL; |
1da177e4 LT |
766 | |
767 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
768 | if (addr->channel != IPMI_BMC_CHANNEL) | |
769 | return -EINVAL; | |
770 | return 0; | |
771 | } | |
772 | ||
773 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 774 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
775 | || (addr->channel < 0)) |
776 | return -EINVAL; | |
777 | ||
25176ed6 | 778 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 779 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 780 | return -EINVAL; |
1da177e4 LT |
781 | return 0; |
782 | } | |
783 | ||
25176ed6 | 784 | if (is_lan_addr(addr)) { |
c70d7499 | 785 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 786 | return -EINVAL; |
1da177e4 LT |
787 | return 0; |
788 | } | |
789 | ||
790 | return -EINVAL; | |
791 | } | |
c70d7499 | 792 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
793 | |
794 | unsigned int ipmi_addr_length(int addr_type) | |
795 | { | |
796 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
797 | return sizeof(struct ipmi_system_interface_addr); | |
798 | ||
799 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 800 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 801 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
802 | |
803 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
804 | return sizeof(struct ipmi_lan_addr); | |
805 | ||
806 | return 0; | |
807 | } | |
c70d7499 | 808 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
809 | |
810 | static void deliver_response(struct ipmi_recv_msg *msg) | |
811 | { | |
8a3628d5 | 812 | if (!msg->user) { |
56a55ec6 | 813 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
814 | |
815 | /* Special handling for NULL users. */ | |
816 | if (intf->null_user_handler) { | |
817 | intf->null_user_handler(intf, msg); | |
b2655f26 | 818 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
819 | } else { |
820 | /* No handler, so give up. */ | |
b2655f26 | 821 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
822 | } |
823 | ipmi_free_recv_msg(msg); | |
c49c0976 HK |
824 | } else if (!oops_in_progress) { |
825 | /* | |
826 | * If we are running in the panic context, calling the | |
827 | * receive handler doesn't much meaning and has a deadlock | |
828 | * risk. At this moment, simply skip it in that case. | |
829 | */ | |
830 | ||
393d2cc3 CM |
831 | ipmi_user_t user = msg->user; |
832 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 833 | } |
1da177e4 LT |
834 | } |
835 | ||
b2c03941 CM |
836 | static void |
837 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
838 | { | |
839 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
840 | msg->msg_data[0] = err; | |
841 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
842 | msg->msg.data_len = 1; | |
843 | msg->msg.data = msg->msg_data; | |
844 | deliver_response(msg); | |
845 | } | |
846 | ||
c70d7499 CM |
847 | /* |
848 | * Find the next sequence number not being used and add the given | |
849 | * message with the given timeout to the sequence table. This must be | |
850 | * called with the interface's seq_lock held. | |
851 | */ | |
1da177e4 LT |
852 | static int intf_next_seq(ipmi_smi_t intf, |
853 | struct ipmi_recv_msg *recv_msg, | |
854 | unsigned long timeout, | |
855 | int retries, | |
856 | int broadcast, | |
857 | unsigned char *seq, | |
858 | long *seqid) | |
859 | { | |
860 | int rv = 0; | |
861 | unsigned int i; | |
862 | ||
c70d7499 CM |
863 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
864 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 865 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
866 | break; |
867 | } | |
868 | ||
8a3628d5 | 869 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
870 | intf->seq_table[i].recv_msg = recv_msg; |
871 | ||
c70d7499 CM |
872 | /* |
873 | * Start with the maximum timeout, when the send response | |
874 | * comes in we will start the real timer. | |
875 | */ | |
1da177e4 LT |
876 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
877 | intf->seq_table[i].orig_timeout = timeout; | |
878 | intf->seq_table[i].retries_left = retries; | |
879 | intf->seq_table[i].broadcast = broadcast; | |
880 | intf->seq_table[i].inuse = 1; | |
881 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
882 | *seq = i; | |
883 | *seqid = intf->seq_table[i].seqid; | |
884 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 885 | need_waiter(intf); |
1da177e4 LT |
886 | } else { |
887 | rv = -EAGAIN; | |
888 | } | |
c70d7499 | 889 | |
1da177e4 LT |
890 | return rv; |
891 | } | |
892 | ||
c70d7499 CM |
893 | /* |
894 | * Return the receive message for the given sequence number and | |
895 | * release the sequence number so it can be reused. Some other data | |
896 | * is passed in to be sure the message matches up correctly (to help | |
897 | * guard against message coming in after their timeout and the | |
898 | * sequence number being reused). | |
899 | */ | |
1da177e4 LT |
900 | static int intf_find_seq(ipmi_smi_t intf, |
901 | unsigned char seq, | |
902 | short channel, | |
903 | unsigned char cmd, | |
904 | unsigned char netfn, | |
905 | struct ipmi_addr *addr, | |
906 | struct ipmi_recv_msg **recv_msg) | |
907 | { | |
908 | int rv = -ENODEV; | |
909 | unsigned long flags; | |
910 | ||
911 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
912 | return -EINVAL; | |
913 | ||
914 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
915 | if (intf->seq_table[seq].inuse) { | |
916 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
917 | ||
c70d7499 CM |
918 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
919 | && (msg->msg.netfn == netfn) | |
920 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
921 | *recv_msg = msg; |
922 | intf->seq_table[seq].inuse = 0; | |
923 | rv = 0; | |
924 | } | |
925 | } | |
926 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
927 | ||
928 | return rv; | |
929 | } | |
930 | ||
931 | ||
932 | /* Start the timer for a specific sequence table entry. */ | |
933 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
934 | long msgid) | |
935 | { | |
936 | int rv = -ENODEV; | |
937 | unsigned long flags; | |
938 | unsigned char seq; | |
939 | unsigned long seqid; | |
940 | ||
941 | ||
942 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
943 | ||
944 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
945 | /* |
946 | * We do this verification because the user can be deleted | |
947 | * while a message is outstanding. | |
948 | */ | |
1da177e4 | 949 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 950 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
951 | struct seq_table *ent = &(intf->seq_table[seq]); |
952 | ent->timeout = ent->orig_timeout; | |
953 | rv = 0; | |
954 | } | |
955 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
956 | ||
957 | return rv; | |
958 | } | |
959 | ||
960 | /* Got an error for the send message for a specific sequence number. */ | |
961 | static int intf_err_seq(ipmi_smi_t intf, | |
962 | long msgid, | |
963 | unsigned int err) | |
964 | { | |
965 | int rv = -ENODEV; | |
966 | unsigned long flags; | |
967 | unsigned char seq; | |
968 | unsigned long seqid; | |
969 | struct ipmi_recv_msg *msg = NULL; | |
970 | ||
971 | ||
972 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
973 | ||
974 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
975 | /* |
976 | * We do this verification because the user can be deleted | |
977 | * while a message is outstanding. | |
978 | */ | |
1da177e4 | 979 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 980 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
981 | struct seq_table *ent = &(intf->seq_table[seq]); |
982 | ||
983 | ent->inuse = 0; | |
984 | msg = ent->recv_msg; | |
985 | rv = 0; | |
986 | } | |
987 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
988 | ||
b2c03941 CM |
989 | if (msg) |
990 | deliver_err_response(msg, err); | |
1da177e4 LT |
991 | |
992 | return rv; | |
993 | } | |
994 | ||
995 | ||
996 | int ipmi_create_user(unsigned int if_num, | |
210af2a5 | 997 | const struct ipmi_user_hndl *handler, |
1da177e4 LT |
998 | void *handler_data, |
999 | ipmi_user_t *user) | |
1000 | { | |
1001 | unsigned long flags; | |
1002 | ipmi_user_t new_user; | |
1003 | int rv = 0; | |
1004 | ipmi_smi_t intf; | |
1005 | ||
c70d7499 CM |
1006 | /* |
1007 | * There is no module usecount here, because it's not | |
1008 | * required. Since this can only be used by and called from | |
1009 | * other modules, they will implicitly use this module, and | |
1010 | * thus this can't be removed unless the other modules are | |
1011 | * removed. | |
1012 | */ | |
1da177e4 LT |
1013 | |
1014 | if (handler == NULL) | |
1015 | return -EINVAL; | |
1016 | ||
c70d7499 CM |
1017 | /* |
1018 | * Make sure the driver is actually initialized, this handles | |
1019 | * problems with initialization order. | |
1020 | */ | |
1da177e4 LT |
1021 | if (!initialized) { |
1022 | rv = ipmi_init_msghandler(); | |
1023 | if (rv) | |
1024 | return rv; | |
1025 | ||
c70d7499 CM |
1026 | /* |
1027 | * The init code doesn't return an error if it was turned | |
1028 | * off, but it won't initialize. Check that. | |
1029 | */ | |
1da177e4 LT |
1030 | if (!initialized) |
1031 | return -ENODEV; | |
1032 | } | |
1033 | ||
1034 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 1035 | if (!new_user) |
1da177e4 LT |
1036 | return -ENOMEM; |
1037 | ||
b2c03941 | 1038 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
1039 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1040 | if (intf->intf_num == if_num) | |
1041 | goto found; | |
1da177e4 | 1042 | } |
b2c03941 | 1043 | /* Not found, return an error */ |
bca0324d CM |
1044 | rv = -EINVAL; |
1045 | goto out_kfree; | |
1da177e4 | 1046 | |
bca0324d | 1047 | found: |
393d2cc3 CM |
1048 | /* Note that each existing user holds a refcount to the interface. */ |
1049 | kref_get(&intf->refcount); | |
1da177e4 | 1050 | |
393d2cc3 | 1051 | kref_init(&new_user->refcount); |
1da177e4 LT |
1052 | new_user->handler = handler; |
1053 | new_user->handler_data = handler_data; | |
1054 | new_user->intf = intf; | |
89986496 | 1055 | new_user->gets_events = false; |
1da177e4 LT |
1056 | |
1057 | if (!try_module_get(intf->handlers->owner)) { | |
1058 | rv = -ENODEV; | |
5c98d29a | 1059 | goto out_kref; |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | if (intf->handlers->inc_usecount) { | |
1063 | rv = intf->handlers->inc_usecount(intf->send_info); | |
1064 | if (rv) { | |
1065 | module_put(intf->handlers->owner); | |
5c98d29a | 1066 | goto out_kref; |
1da177e4 LT |
1067 | } |
1068 | } | |
1069 | ||
c70d7499 CM |
1070 | /* |
1071 | * Hold the lock so intf->handlers is guaranteed to be good | |
1072 | * until now | |
1073 | */ | |
b2c03941 CM |
1074 | mutex_unlock(&ipmi_interfaces_mutex); |
1075 | ||
7aefac26 | 1076 | new_user->valid = true; |
393d2cc3 CM |
1077 | spin_lock_irqsave(&intf->seq_lock, flags); |
1078 | list_add_rcu(&new_user->link, &intf->users); | |
1079 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
1080 | if (handler->ipmi_watchdog_pretimeout) { |
1081 | /* User wants pretimeouts, so make sure to watch for them. */ | |
1082 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1083 | need_waiter(intf); | |
1084 | } | |
393d2cc3 CM |
1085 | *user = new_user; |
1086 | return 0; | |
1da177e4 | 1087 | |
5c98d29a | 1088 | out_kref: |
393d2cc3 | 1089 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 1090 | out_kfree: |
b2c03941 | 1091 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 1092 | kfree(new_user); |
1da177e4 LT |
1093 | return rv; |
1094 | } | |
c70d7499 | 1095 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1096 | |
16f4232c ZY |
1097 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1098 | { | |
1099 | int rv = 0; | |
1100 | ipmi_smi_t intf; | |
81d02b7f | 1101 | const struct ipmi_smi_handlers *handlers; |
16f4232c ZY |
1102 | |
1103 | mutex_lock(&ipmi_interfaces_mutex); | |
1104 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1105 | if (intf->intf_num == if_num) | |
1106 | goto found; | |
1107 | } | |
1108 | /* Not found, return an error */ | |
1109 | rv = -EINVAL; | |
1110 | mutex_unlock(&ipmi_interfaces_mutex); | |
1111 | return rv; | |
1112 | ||
1113 | found: | |
1114 | handlers = intf->handlers; | |
1115 | rv = -ENOSYS; | |
1116 | if (handlers->get_smi_info) | |
1117 | rv = handlers->get_smi_info(intf->send_info, data); | |
1118 | mutex_unlock(&ipmi_interfaces_mutex); | |
1119 | ||
1120 | return rv; | |
1121 | } | |
1122 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1123 | ||
393d2cc3 CM |
1124 | static void free_user(struct kref *ref) |
1125 | { | |
1126 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1127 | kfree(user); | |
1128 | } | |
1129 | ||
1130 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1131 | { |
393d2cc3 | 1132 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1133 | int i; |
1134 | unsigned long flags; | |
393d2cc3 | 1135 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1136 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1137 | |
7aefac26 | 1138 | user->valid = false; |
1da177e4 | 1139 | |
89986496 CM |
1140 | if (user->handler->ipmi_watchdog_pretimeout) |
1141 | atomic_dec(&intf->event_waiters); | |
1142 | ||
1143 | if (user->gets_events) | |
1144 | atomic_dec(&intf->event_waiters); | |
1145 | ||
393d2cc3 CM |
1146 | /* Remove the user from the interface's sequence table. */ |
1147 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1148 | list_del_rcu(&user->link); | |
1da177e4 | 1149 | |
e8b33617 | 1150 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1151 | if (intf->seq_table[i].inuse |
c70d7499 | 1152 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1153 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1154 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1155 | } |
1156 | } | |
393d2cc3 CM |
1157 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1158 | ||
1159 | /* | |
1160 | * Remove the user from the command receiver's table. First | |
1161 | * we build a list of everything (not using the standard link, | |
1162 | * since other things may be using it till we do | |
1163 | * synchronize_rcu()) then free everything in that list. | |
1164 | */ | |
d6dfd131 | 1165 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1166 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1167 | if (rcvr->user == user) { |
393d2cc3 CM |
1168 | list_del_rcu(&rcvr->link); |
1169 | rcvr->next = rcvrs; | |
1170 | rcvrs = rcvr; | |
1da177e4 LT |
1171 | } |
1172 | } | |
d6dfd131 | 1173 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1174 | synchronize_rcu(); |
1175 | while (rcvrs) { | |
1176 | rcvr = rcvrs; | |
1177 | rcvrs = rcvr->next; | |
1178 | kfree(rcvr); | |
1179 | } | |
1da177e4 | 1180 | |
b2c03941 CM |
1181 | mutex_lock(&ipmi_interfaces_mutex); |
1182 | if (intf->handlers) { | |
1183 | module_put(intf->handlers->owner); | |
1184 | if (intf->handlers->dec_usecount) | |
1185 | intf->handlers->dec_usecount(intf->send_info); | |
1186 | } | |
1187 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1188 | |
393d2cc3 | 1189 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1190 | |
393d2cc3 | 1191 | kref_put(&user->refcount, free_user); |
1da177e4 | 1192 | |
8a3628d5 | 1193 | return 0; |
1da177e4 | 1194 | } |
c70d7499 | 1195 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1196 | |
1197 | void ipmi_get_version(ipmi_user_t user, | |
1198 | unsigned char *major, | |
1199 | unsigned char *minor) | |
1200 | { | |
b2c03941 CM |
1201 | *major = user->intf->ipmi_version_major; |
1202 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1203 | } |
c70d7499 | 1204 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1205 | |
c14979b9 CM |
1206 | int ipmi_set_my_address(ipmi_user_t user, |
1207 | unsigned int channel, | |
1208 | unsigned char address) | |
1da177e4 | 1209 | { |
c14979b9 CM |
1210 | if (channel >= IPMI_MAX_CHANNELS) |
1211 | return -EINVAL; | |
1212 | user->intf->channels[channel].address = address; | |
1213 | return 0; | |
1da177e4 | 1214 | } |
c70d7499 | 1215 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1216 | |
c14979b9 CM |
1217 | int ipmi_get_my_address(ipmi_user_t user, |
1218 | unsigned int channel, | |
1219 | unsigned char *address) | |
1da177e4 | 1220 | { |
c14979b9 CM |
1221 | if (channel >= IPMI_MAX_CHANNELS) |
1222 | return -EINVAL; | |
1223 | *address = user->intf->channels[channel].address; | |
1224 | return 0; | |
1da177e4 | 1225 | } |
c70d7499 | 1226 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1227 | |
c14979b9 CM |
1228 | int ipmi_set_my_LUN(ipmi_user_t user, |
1229 | unsigned int channel, | |
1230 | unsigned char LUN) | |
1da177e4 | 1231 | { |
c14979b9 CM |
1232 | if (channel >= IPMI_MAX_CHANNELS) |
1233 | return -EINVAL; | |
1234 | user->intf->channels[channel].lun = LUN & 0x3; | |
1235 | return 0; | |
1da177e4 | 1236 | } |
c70d7499 | 1237 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1238 | |
c14979b9 CM |
1239 | int ipmi_get_my_LUN(ipmi_user_t user, |
1240 | unsigned int channel, | |
1241 | unsigned char *address) | |
1da177e4 | 1242 | { |
c14979b9 CM |
1243 | if (channel >= IPMI_MAX_CHANNELS) |
1244 | return -EINVAL; | |
1245 | *address = user->intf->channels[channel].lun; | |
1246 | return 0; | |
1da177e4 | 1247 | } |
c70d7499 | 1248 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1249 | |
b9675136 CM |
1250 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1251 | { | |
1252 | int mode; | |
1253 | unsigned long flags; | |
1254 | ||
1255 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1256 | mode = user->intf->maintenance_mode; | |
1257 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1258 | ||
1259 | return mode; | |
1260 | } | |
1261 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1262 | ||
1263 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1264 | { | |
1265 | if (intf->handlers->set_maintenance_mode) | |
1266 | intf->handlers->set_maintenance_mode( | |
1267 | intf->send_info, intf->maintenance_mode_enable); | |
1268 | } | |
1269 | ||
1270 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1271 | { | |
1272 | int rv = 0; | |
1273 | unsigned long flags; | |
1274 | ipmi_smi_t intf = user->intf; | |
1275 | ||
1276 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1277 | if (intf->maintenance_mode != mode) { | |
1278 | switch (mode) { | |
1279 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1280 | intf->maintenance_mode_enable |
1281 | = (intf->auto_maintenance_timeout > 0); | |
1282 | break; | |
1283 | ||
1284 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1285 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1286 | break; |
1287 | ||
1288 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1289 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1290 | break; |
1291 | ||
1292 | default: | |
1293 | rv = -EINVAL; | |
1294 | goto out_unlock; | |
1295 | } | |
7aefac26 | 1296 | intf->maintenance_mode = mode; |
b9675136 CM |
1297 | |
1298 | maintenance_mode_update(intf); | |
1299 | } | |
1300 | out_unlock: | |
1301 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1302 | ||
1303 | return rv; | |
1304 | } | |
1305 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1306 | ||
89986496 | 1307 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1308 | { |
393d2cc3 CM |
1309 | unsigned long flags; |
1310 | ipmi_smi_t intf = user->intf; | |
1311 | struct ipmi_recv_msg *msg, *msg2; | |
1312 | struct list_head msgs; | |
1da177e4 | 1313 | |
393d2cc3 CM |
1314 | INIT_LIST_HEAD(&msgs); |
1315 | ||
1316 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1317 | if (user->gets_events == val) |
1318 | goto out; | |
1319 | ||
1da177e4 LT |
1320 | user->gets_events = val; |
1321 | ||
89986496 CM |
1322 | if (val) { |
1323 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1324 | need_waiter(intf); | |
1325 | } else { | |
1326 | atomic_dec(&intf->event_waiters); | |
1327 | } | |
1328 | ||
b2c03941 CM |
1329 | if (intf->delivering_events) |
1330 | /* | |
1331 | * Another thread is delivering events for this, so | |
1332 | * let it handle any new events. | |
1333 | */ | |
1334 | goto out; | |
1335 | ||
1336 | /* Deliver any queued events. */ | |
1337 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1338 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1339 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1340 | intf->waiting_events_count = 0; |
87ebd06f CM |
1341 | if (intf->event_msg_printed) { |
1342 | printk(KERN_WARNING PFX "Event queue no longer" | |
1343 | " full\n"); | |
1344 | intf->event_msg_printed = 0; | |
1345 | } | |
393d2cc3 | 1346 | |
b2c03941 CM |
1347 | intf->delivering_events = 1; |
1348 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1349 | ||
1350 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1351 | msg->user = user; | |
1352 | kref_get(&user->refcount); | |
1353 | deliver_response(msg); | |
1354 | } | |
1355 | ||
1356 | spin_lock_irqsave(&intf->events_lock, flags); | |
1357 | intf->delivering_events = 0; | |
393d2cc3 CM |
1358 | } |
1359 | ||
b2c03941 | 1360 | out: |
393d2cc3 | 1361 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1362 | |
1363 | return 0; | |
1364 | } | |
c70d7499 | 1365 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1366 | |
393d2cc3 CM |
1367 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1368 | unsigned char netfn, | |
c69c3127 CM |
1369 | unsigned char cmd, |
1370 | unsigned char chan) | |
393d2cc3 CM |
1371 | { |
1372 | struct cmd_rcvr *rcvr; | |
1373 | ||
1374 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1375 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1376 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1377 | return rcvr; |
1378 | } | |
1379 | return NULL; | |
1380 | } | |
1381 | ||
c69c3127 CM |
1382 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1383 | unsigned char netfn, | |
1384 | unsigned char cmd, | |
1385 | unsigned int chans) | |
1386 | { | |
1387 | struct cmd_rcvr *rcvr; | |
1388 | ||
1389 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1390 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1391 | && (rcvr->chans & chans)) | |
1392 | return 0; | |
1393 | } | |
1394 | return 1; | |
1395 | } | |
1396 | ||
1da177e4 LT |
1397 | int ipmi_register_for_cmd(ipmi_user_t user, |
1398 | unsigned char netfn, | |
c69c3127 CM |
1399 | unsigned char cmd, |
1400 | unsigned int chans) | |
1da177e4 | 1401 | { |
393d2cc3 CM |
1402 | ipmi_smi_t intf = user->intf; |
1403 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1404 | int rv = 0; |
1da177e4 LT |
1405 | |
1406 | ||
1407 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1408 | if (!rcvr) |
1da177e4 | 1409 | return -ENOMEM; |
393d2cc3 CM |
1410 | rcvr->cmd = cmd; |
1411 | rcvr->netfn = netfn; | |
c69c3127 | 1412 | rcvr->chans = chans; |
393d2cc3 | 1413 | rcvr->user = user; |
1da177e4 | 1414 | |
d6dfd131 | 1415 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1416 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1417 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1418 | rv = -EBUSY; |
1419 | goto out_unlock; | |
1da177e4 | 1420 | } |
877197ef | 1421 | |
89986496 CM |
1422 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1423 | need_waiter(intf); | |
1424 | ||
393d2cc3 | 1425 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1426 | |
393d2cc3 | 1427 | out_unlock: |
d6dfd131 | 1428 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1429 | if (rv) |
1430 | kfree(rcvr); | |
1431 | ||
1432 | return rv; | |
1433 | } | |
c70d7499 | 1434 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1435 | |
1436 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1437 | unsigned char netfn, | |
c69c3127 CM |
1438 | unsigned char cmd, |
1439 | unsigned int chans) | |
1da177e4 | 1440 | { |
393d2cc3 CM |
1441 | ipmi_smi_t intf = user->intf; |
1442 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1443 | struct cmd_rcvr *rcvrs = NULL; |
1444 | int i, rv = -ENOENT; | |
1da177e4 | 1445 | |
d6dfd131 | 1446 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1447 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1448 | if (((1 << i) & chans) == 0) | |
1449 | continue; | |
1450 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1451 | if (rcvr == NULL) | |
1452 | continue; | |
1453 | if (rcvr->user == user) { | |
1454 | rv = 0; | |
1455 | rcvr->chans &= ~chans; | |
1456 | if (rcvr->chans == 0) { | |
1457 | list_del_rcu(&rcvr->link); | |
1458 | rcvr->next = rcvrs; | |
1459 | rcvrs = rcvr; | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1464 | synchronize_rcu(); | |
1465 | while (rcvrs) { | |
89986496 | 1466 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1467 | rcvr = rcvrs; |
1468 | rcvrs = rcvr->next; | |
393d2cc3 | 1469 | kfree(rcvr); |
1da177e4 | 1470 | } |
c69c3127 | 1471 | return rv; |
1da177e4 | 1472 | } |
c70d7499 | 1473 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1474 | |
1da177e4 LT |
1475 | static unsigned char |
1476 | ipmb_checksum(unsigned char *data, int size) | |
1477 | { | |
1478 | unsigned char csum = 0; | |
c70d7499 | 1479 | |
1da177e4 LT |
1480 | for (; size > 0; size--, data++) |
1481 | csum += *data; | |
1482 | ||
1483 | return -csum; | |
1484 | } | |
1485 | ||
1486 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1487 | struct kernel_ipmi_msg *msg, | |
1488 | struct ipmi_ipmb_addr *ipmb_addr, | |
1489 | long msgid, | |
1490 | unsigned char ipmb_seq, | |
1491 | int broadcast, | |
1492 | unsigned char source_address, | |
1493 | unsigned char source_lun) | |
1494 | { | |
1495 | int i = broadcast; | |
1496 | ||
1497 | /* Format the IPMB header data. */ | |
1498 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1499 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1500 | smi_msg->data[2] = ipmb_addr->channel; | |
1501 | if (broadcast) | |
1502 | smi_msg->data[3] = 0; | |
1503 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1504 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1505 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1506 | smi_msg->data[i+6] = source_address; | |
1507 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1508 | smi_msg->data[i+8] = msg->cmd; | |
1509 | ||
1510 | /* Now tack on the data to the message. */ | |
1511 | if (msg->data_len > 0) | |
1512 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1513 | msg->data_len); | |
1514 | smi_msg->data_size = msg->data_len + 9; | |
1515 | ||
1516 | /* Now calculate the checksum and tack it on. */ | |
1517 | smi_msg->data[i+smi_msg->data_size] | |
1518 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1519 | smi_msg->data_size-6); | |
1520 | ||
c70d7499 CM |
1521 | /* |
1522 | * Add on the checksum size and the offset from the | |
1523 | * broadcast. | |
1524 | */ | |
1da177e4 LT |
1525 | smi_msg->data_size += 1 + i; |
1526 | ||
1527 | smi_msg->msgid = msgid; | |
1528 | } | |
1529 | ||
1530 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1531 | struct kernel_ipmi_msg *msg, | |
1532 | struct ipmi_lan_addr *lan_addr, | |
1533 | long msgid, | |
1534 | unsigned char ipmb_seq, | |
1535 | unsigned char source_lun) | |
1536 | { | |
1537 | /* Format the IPMB header data. */ | |
1538 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1539 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1540 | smi_msg->data[2] = lan_addr->channel; | |
1541 | smi_msg->data[3] = lan_addr->session_handle; | |
1542 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1543 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1544 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1545 | smi_msg->data[7] = lan_addr->local_SWID; | |
1546 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1547 | smi_msg->data[9] = msg->cmd; | |
1548 | ||
1549 | /* Now tack on the data to the message. */ | |
1550 | if (msg->data_len > 0) | |
1551 | memcpy(&(smi_msg->data[10]), msg->data, | |
1552 | msg->data_len); | |
1553 | smi_msg->data_size = msg->data_len + 10; | |
1554 | ||
1555 | /* Now calculate the checksum and tack it on. */ | |
1556 | smi_msg->data[smi_msg->data_size] | |
1557 | = ipmb_checksum(&(smi_msg->data[7]), | |
1558 | smi_msg->data_size-7); | |
1559 | ||
c70d7499 CM |
1560 | /* |
1561 | * Add on the checksum size and the offset from the | |
1562 | * broadcast. | |
1563 | */ | |
1da177e4 LT |
1564 | smi_msg->data_size += 1; |
1565 | ||
1566 | smi_msg->msgid = msgid; | |
1567 | } | |
1568 | ||
191cc414 AB |
1569 | static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf, |
1570 | struct ipmi_smi_msg *smi_msg, | |
1571 | int priority) | |
7f4a1c84 | 1572 | { |
7ea0ed2b CM |
1573 | if (intf->curr_msg) { |
1574 | if (priority > 0) | |
1575 | list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs); | |
1576 | else | |
1577 | list_add_tail(&smi_msg->link, &intf->xmit_msgs); | |
1578 | smi_msg = NULL; | |
1579 | } else { | |
1580 | intf->curr_msg = smi_msg; | |
1581 | } | |
191cc414 AB |
1582 | |
1583 | return smi_msg; | |
1584 | } | |
1585 | ||
1586 | ||
81d02b7f | 1587 | static void smi_send(ipmi_smi_t intf, const struct ipmi_smi_handlers *handlers, |
191cc414 AB |
1588 | struct ipmi_smi_msg *smi_msg, int priority) |
1589 | { | |
1590 | int run_to_completion = intf->run_to_completion; | |
1591 | ||
1592 | if (run_to_completion) { | |
1593 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
1594 | } else { | |
1595 | unsigned long flags; | |
1596 | ||
1597 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
1598 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
7ea0ed2b | 1599 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
191cc414 | 1600 | } |
7ea0ed2b CM |
1601 | |
1602 | if (smi_msg) | |
99ab32f3 | 1603 | handlers->sender(intf->send_info, smi_msg); |
7f4a1c84 CM |
1604 | } |
1605 | ||
c70d7499 CM |
1606 | /* |
1607 | * Separate from ipmi_request so that the user does not have to be | |
1608 | * supplied in certain circumstances (mainly at panic time). If | |
1609 | * messages are supplied, they will be freed, even if an error | |
1610 | * occurs. | |
1611 | */ | |
393d2cc3 CM |
1612 | static int i_ipmi_request(ipmi_user_t user, |
1613 | ipmi_smi_t intf, | |
1614 | struct ipmi_addr *addr, | |
1615 | long msgid, | |
1616 | struct kernel_ipmi_msg *msg, | |
1617 | void *user_msg_data, | |
1618 | void *supplied_smi, | |
1619 | struct ipmi_recv_msg *supplied_recv, | |
1620 | int priority, | |
1621 | unsigned char source_address, | |
1622 | unsigned char source_lun, | |
1623 | int retries, | |
1624 | unsigned int retry_time_ms) | |
1da177e4 | 1625 | { |
b2c03941 CM |
1626 | int rv = 0; |
1627 | struct ipmi_smi_msg *smi_msg; | |
1628 | struct ipmi_recv_msg *recv_msg; | |
1629 | unsigned long flags; | |
1da177e4 LT |
1630 | |
1631 | ||
c70d7499 | 1632 | if (supplied_recv) |
1da177e4 | 1633 | recv_msg = supplied_recv; |
c70d7499 | 1634 | else { |
1da177e4 | 1635 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1636 | if (recv_msg == NULL) |
1da177e4 | 1637 | return -ENOMEM; |
1da177e4 LT |
1638 | } |
1639 | recv_msg->user_msg_data = user_msg_data; | |
1640 | ||
c70d7499 | 1641 | if (supplied_smi) |
1da177e4 | 1642 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1643 | else { |
1da177e4 LT |
1644 | smi_msg = ipmi_alloc_smi_msg(); |
1645 | if (smi_msg == NULL) { | |
1646 | ipmi_free_recv_msg(recv_msg); | |
1647 | return -ENOMEM; | |
1648 | } | |
1649 | } | |
1650 | ||
b2c03941 | 1651 | rcu_read_lock(); |
7ea0ed2b | 1652 | if (intf->in_shutdown) { |
b2c03941 CM |
1653 | rv = -ENODEV; |
1654 | goto out_err; | |
1655 | } | |
1656 | ||
1da177e4 | 1657 | recv_msg->user = user; |
393d2cc3 CM |
1658 | if (user) |
1659 | kref_get(&user->refcount); | |
1da177e4 | 1660 | recv_msg->msgid = msgid; |
c70d7499 CM |
1661 | /* |
1662 | * Store the message to send in the receive message so timeout | |
1663 | * responses can get the proper response data. | |
1664 | */ | |
1da177e4 LT |
1665 | recv_msg->msg = *msg; |
1666 | ||
1667 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1668 | struct ipmi_system_interface_addr *smi_addr; | |
1669 | ||
1670 | if (msg->netfn & 1) { | |
1671 | /* Responses are not allowed to the SMI. */ | |
1672 | rv = -EINVAL; | |
1673 | goto out_err; | |
1674 | } | |
1675 | ||
1676 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1677 | if (smi_addr->lun > 3) { | |
b2655f26 | 1678 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1679 | rv = -EINVAL; |
1680 | goto out_err; | |
1681 | } | |
1682 | ||
1683 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1684 | ||
1685 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1686 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1687 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1688 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1689 | /* | |
1690 | * We don't let the user do these, since we manage | |
1691 | * the sequence numbers. | |
1692 | */ | |
b2655f26 | 1693 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1694 | rv = -EINVAL; |
1695 | goto out_err; | |
1696 | } | |
1697 | ||
b9675136 CM |
1698 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1699 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1700 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1701 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1702 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1703 | intf->auto_maintenance_timeout | |
1704 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1705 | if (!intf->maintenance_mode | |
c70d7499 | 1706 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1707 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1708 | maintenance_mode_update(intf); |
1709 | } | |
1710 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1711 | flags); | |
1712 | } | |
1713 | ||
1da177e4 | 1714 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1715 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1716 | rv = -EMSGSIZE; |
1717 | goto out_err; | |
1718 | } | |
1719 | ||
1720 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1721 | smi_msg->data[1] = msg->cmd; | |
1722 | smi_msg->msgid = msgid; | |
1723 | smi_msg->user_data = recv_msg; | |
1724 | if (msg->data_len > 0) | |
1725 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1726 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1727 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1728 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1729 | struct ipmi_ipmb_addr *ipmb_addr; |
1730 | unsigned char ipmb_seq; | |
1731 | long seqid; | |
1732 | int broadcast = 0; | |
1733 | ||
9c101fd4 | 1734 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1735 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1736 | rv = -EINVAL; |
1737 | goto out_err; | |
1738 | } | |
1739 | ||
1740 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1741 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1742 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1743 | rv = -EINVAL; |
1744 | goto out_err; | |
1745 | } | |
1746 | ||
1747 | if (retries < 0) { | |
1748 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1749 | retries = 0; /* Don't retry broadcasts. */ | |
1750 | else | |
1751 | retries = 4; | |
1752 | } | |
1753 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1754 | /* |
1755 | * Broadcasts add a zero at the beginning of the | |
1756 | * message, but otherwise is the same as an IPMB | |
1757 | * address. | |
1758 | */ | |
1da177e4 LT |
1759 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1760 | broadcast = 1; | |
1761 | } | |
1762 | ||
1763 | ||
1764 | /* Default to 1 second retries. */ | |
1765 | if (retry_time_ms == 0) | |
1766 | retry_time_ms = 1000; | |
1767 | ||
c70d7499 CM |
1768 | /* |
1769 | * 9 for the header and 1 for the checksum, plus | |
1770 | * possibly one for the broadcast. | |
1771 | */ | |
1da177e4 | 1772 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1773 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1774 | rv = -EMSGSIZE; |
1775 | goto out_err; | |
1776 | } | |
1777 | ||
1778 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1779 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1780 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1781 | rv = -EINVAL; |
1782 | goto out_err; | |
1783 | } | |
1784 | ||
1785 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1786 | ||
1787 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1788 | /* |
1789 | * It's a response, so use the user's sequence | |
1790 | * from msgid. | |
1791 | */ | |
b2655f26 | 1792 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1793 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1794 | msgid, broadcast, | |
1795 | source_address, source_lun); | |
1796 | ||
c70d7499 CM |
1797 | /* |
1798 | * Save the receive message so we can use it | |
1799 | * to deliver the response. | |
1800 | */ | |
1da177e4 LT |
1801 | smi_msg->user_data = recv_msg; |
1802 | } else { | |
1803 | /* It's a command, so get a sequence for it. */ | |
1804 | ||
1805 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1806 | ||
c70d7499 CM |
1807 | /* |
1808 | * Create a sequence number with a 1 second | |
1809 | * timeout and 4 retries. | |
1810 | */ | |
1da177e4 LT |
1811 | rv = intf_next_seq(intf, |
1812 | recv_msg, | |
1813 | retry_time_ms, | |
1814 | retries, | |
1815 | broadcast, | |
1816 | &ipmb_seq, | |
1817 | &seqid); | |
1818 | if (rv) { | |
c70d7499 CM |
1819 | /* |
1820 | * We have used up all the sequence numbers, | |
1821 | * probably, so abort. | |
1822 | */ | |
1da177e4 LT |
1823 | spin_unlock_irqrestore(&(intf->seq_lock), |
1824 | flags); | |
1825 | goto out_err; | |
1826 | } | |
1827 | ||
25176ed6 CM |
1828 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1829 | ||
c70d7499 CM |
1830 | /* |
1831 | * Store the sequence number in the message, | |
1832 | * so that when the send message response | |
1833 | * comes back we can start the timer. | |
1834 | */ | |
1da177e4 LT |
1835 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1836 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1837 | ipmb_seq, broadcast, | |
1838 | source_address, source_lun); | |
1839 | ||
c70d7499 CM |
1840 | /* |
1841 | * Copy the message into the recv message data, so we | |
1842 | * can retransmit it later if necessary. | |
1843 | */ | |
1da177e4 LT |
1844 | memcpy(recv_msg->msg_data, smi_msg->data, |
1845 | smi_msg->data_size); | |
1846 | recv_msg->msg.data = recv_msg->msg_data; | |
1847 | recv_msg->msg.data_len = smi_msg->data_size; | |
1848 | ||
c70d7499 CM |
1849 | /* |
1850 | * We don't unlock until here, because we need | |
1851 | * to copy the completed message into the | |
1852 | * recv_msg before we release the lock. | |
1853 | * Otherwise, race conditions may bite us. I | |
1854 | * know that's pretty paranoid, but I prefer | |
1855 | * to be correct. | |
1856 | */ | |
1da177e4 LT |
1857 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1858 | } | |
25176ed6 | 1859 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1860 | struct ipmi_lan_addr *lan_addr; |
1861 | unsigned char ipmb_seq; | |
1862 | long seqid; | |
1863 | ||
12fc1d7b | 1864 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1865 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1866 | rv = -EINVAL; |
1867 | goto out_err; | |
1868 | } | |
1869 | ||
1870 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1871 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1872 | && (intf->channels[addr->channel].medium |
c70d7499 | 1873 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1874 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1875 | rv = -EINVAL; |
1876 | goto out_err; | |
1877 | } | |
1878 | ||
1879 | retries = 4; | |
1880 | ||
1881 | /* Default to 1 second retries. */ | |
1882 | if (retry_time_ms == 0) | |
1883 | retry_time_ms = 1000; | |
1884 | ||
1885 | /* 11 for the header and 1 for the checksum. */ | |
1886 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1887 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1888 | rv = -EMSGSIZE; |
1889 | goto out_err; | |
1890 | } | |
1891 | ||
1892 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1893 | if (lan_addr->lun > 3) { | |
b2655f26 | 1894 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1895 | rv = -EINVAL; |
1896 | goto out_err; | |
1897 | } | |
1898 | ||
1899 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1900 | ||
1901 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1902 | /* |
1903 | * It's a response, so use the user's sequence | |
1904 | * from msgid. | |
1905 | */ | |
b2655f26 | 1906 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1907 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1908 | msgid, source_lun); | |
1909 | ||
c70d7499 CM |
1910 | /* |
1911 | * Save the receive message so we can use it | |
1912 | * to deliver the response. | |
1913 | */ | |
1da177e4 LT |
1914 | smi_msg->user_data = recv_msg; |
1915 | } else { | |
1916 | /* It's a command, so get a sequence for it. */ | |
1917 | ||
1918 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1919 | ||
c70d7499 CM |
1920 | /* |
1921 | * Create a sequence number with a 1 second | |
1922 | * timeout and 4 retries. | |
1923 | */ | |
1da177e4 LT |
1924 | rv = intf_next_seq(intf, |
1925 | recv_msg, | |
1926 | retry_time_ms, | |
1927 | retries, | |
1928 | 0, | |
1929 | &ipmb_seq, | |
1930 | &seqid); | |
1931 | if (rv) { | |
c70d7499 CM |
1932 | /* |
1933 | * We have used up all the sequence numbers, | |
1934 | * probably, so abort. | |
1935 | */ | |
1da177e4 LT |
1936 | spin_unlock_irqrestore(&(intf->seq_lock), |
1937 | flags); | |
1938 | goto out_err; | |
1939 | } | |
1940 | ||
25176ed6 CM |
1941 | ipmi_inc_stat(intf, sent_lan_commands); |
1942 | ||
c70d7499 CM |
1943 | /* |
1944 | * Store the sequence number in the message, | |
1945 | * so that when the send message response | |
1946 | * comes back we can start the timer. | |
1947 | */ | |
1da177e4 LT |
1948 | format_lan_msg(smi_msg, msg, lan_addr, |
1949 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1950 | ipmb_seq, source_lun); | |
1951 | ||
c70d7499 CM |
1952 | /* |
1953 | * Copy the message into the recv message data, so we | |
1954 | * can retransmit it later if necessary. | |
1955 | */ | |
1da177e4 LT |
1956 | memcpy(recv_msg->msg_data, smi_msg->data, |
1957 | smi_msg->data_size); | |
1958 | recv_msg->msg.data = recv_msg->msg_data; | |
1959 | recv_msg->msg.data_len = smi_msg->data_size; | |
1960 | ||
c70d7499 CM |
1961 | /* |
1962 | * We don't unlock until here, because we need | |
1963 | * to copy the completed message into the | |
1964 | * recv_msg before we release the lock. | |
1965 | * Otherwise, race conditions may bite us. I | |
1966 | * know that's pretty paranoid, but I prefer | |
1967 | * to be correct. | |
1968 | */ | |
1da177e4 LT |
1969 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1970 | } | |
1971 | } else { | |
1972 | /* Unknown address type. */ | |
b2655f26 | 1973 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1974 | rv = -EINVAL; |
1975 | goto out_err; | |
1976 | } | |
1977 | ||
1978 | #ifdef DEBUG_MSGING | |
1979 | { | |
1980 | int m; | |
e8b33617 | 1981 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1982 | printk(" %2.2x", smi_msg->data[m]); |
1983 | printk("\n"); | |
1984 | } | |
1985 | #endif | |
b2c03941 | 1986 | |
7ea0ed2b | 1987 | smi_send(intf, intf->handlers, smi_msg, priority); |
b2c03941 | 1988 | rcu_read_unlock(); |
1da177e4 LT |
1989 | |
1990 | return 0; | |
1991 | ||
1992 | out_err: | |
b2c03941 | 1993 | rcu_read_unlock(); |
1da177e4 LT |
1994 | ipmi_free_smi_msg(smi_msg); |
1995 | ipmi_free_recv_msg(recv_msg); | |
1996 | return rv; | |
1997 | } | |
1998 | ||
c14979b9 CM |
1999 | static int check_addr(ipmi_smi_t intf, |
2000 | struct ipmi_addr *addr, | |
2001 | unsigned char *saddr, | |
2002 | unsigned char *lun) | |
2003 | { | |
2004 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
2005 | return -EINVAL; | |
2006 | *lun = intf->channels[addr->channel].lun; | |
2007 | *saddr = intf->channels[addr->channel].address; | |
2008 | return 0; | |
2009 | } | |
2010 | ||
1da177e4 LT |
2011 | int ipmi_request_settime(ipmi_user_t user, |
2012 | struct ipmi_addr *addr, | |
2013 | long msgid, | |
2014 | struct kernel_ipmi_msg *msg, | |
2015 | void *user_msg_data, | |
2016 | int priority, | |
2017 | int retries, | |
2018 | unsigned int retry_time_ms) | |
2019 | { | |
f0ba9390 | 2020 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2021 | int rv; |
2022 | ||
8a3628d5 | 2023 | if (!user) |
56a55ec6 | 2024 | return -EINVAL; |
c14979b9 CM |
2025 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2026 | if (rv) | |
2027 | return rv; | |
1da177e4 LT |
2028 | return i_ipmi_request(user, |
2029 | user->intf, | |
2030 | addr, | |
2031 | msgid, | |
2032 | msg, | |
2033 | user_msg_data, | |
2034 | NULL, NULL, | |
2035 | priority, | |
c14979b9 CM |
2036 | saddr, |
2037 | lun, | |
1da177e4 LT |
2038 | retries, |
2039 | retry_time_ms); | |
2040 | } | |
c70d7499 | 2041 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
2042 | |
2043 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
2044 | struct ipmi_addr *addr, | |
2045 | long msgid, | |
2046 | struct kernel_ipmi_msg *msg, | |
2047 | void *user_msg_data, | |
2048 | void *supplied_smi, | |
2049 | struct ipmi_recv_msg *supplied_recv, | |
2050 | int priority) | |
2051 | { | |
9ebca93b | 2052 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2053 | int rv; |
2054 | ||
8a3628d5 | 2055 | if (!user) |
56a55ec6 | 2056 | return -EINVAL; |
c14979b9 CM |
2057 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2058 | if (rv) | |
2059 | return rv; | |
1da177e4 LT |
2060 | return i_ipmi_request(user, |
2061 | user->intf, | |
2062 | addr, | |
2063 | msgid, | |
2064 | msg, | |
2065 | user_msg_data, | |
2066 | supplied_smi, | |
2067 | supplied_recv, | |
2068 | priority, | |
c14979b9 CM |
2069 | saddr, |
2070 | lun, | |
1da177e4 LT |
2071 | -1, 0); |
2072 | } | |
c70d7499 | 2073 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 2074 | |
1aa16eea | 2075 | #ifdef CONFIG_PROC_FS |
07412736 | 2076 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2077 | { |
07412736 | 2078 | ipmi_smi_t intf = m->private; |
c14979b9 | 2079 | int i; |
1da177e4 | 2080 | |
07412736 AD |
2081 | seq_printf(m, "%x", intf->channels[0].address); |
2082 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) | |
2083 | seq_printf(m, " %x", intf->channels[i].address); | |
d6c5dc18 JP |
2084 | seq_putc(m, '\n'); |
2085 | ||
5e33cd0c | 2086 | return 0; |
1da177e4 LT |
2087 | } |
2088 | ||
07412736 | 2089 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2090 | { |
d9dda78b | 2091 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 2092 | } |
1da177e4 | 2093 | |
07412736 AD |
2094 | static const struct file_operations smi_ipmb_proc_ops = { |
2095 | .open = smi_ipmb_proc_open, | |
2096 | .read = seq_read, | |
2097 | .llseek = seq_lseek, | |
2098 | .release = single_release, | |
2099 | }; | |
2100 | ||
2101 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
2102 | { | |
2103 | ipmi_smi_t intf = m->private; | |
2104 | ||
d6c5dc18 JP |
2105 | seq_printf(m, "%u.%u\n", |
2106 | ipmi_version_major(&intf->bmc->id), | |
2107 | ipmi_version_minor(&intf->bmc->id)); | |
2108 | ||
5e33cd0c | 2109 | return 0; |
1da177e4 LT |
2110 | } |
2111 | ||
07412736 | 2112 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2113 | { |
d9dda78b | 2114 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
2115 | } |
2116 | ||
2117 | static const struct file_operations smi_version_proc_ops = { | |
2118 | .open = smi_version_proc_open, | |
2119 | .read = seq_read, | |
2120 | .llseek = seq_lseek, | |
2121 | .release = single_release, | |
2122 | }; | |
1da177e4 | 2123 | |
07412736 AD |
2124 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
2125 | { | |
2126 | ipmi_smi_t intf = m->private; | |
2127 | ||
2128 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 2129 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 2130 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 2131 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2132 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2133 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2134 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2135 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2136 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2137 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2138 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2139 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2140 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2141 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2142 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2143 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2144 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2145 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2146 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2147 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2148 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2149 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2150 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2151 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2152 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2153 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2154 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2155 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2156 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2157 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2158 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2159 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2160 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2161 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2162 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2163 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2164 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2165 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2166 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2167 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2168 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2169 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2170 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2171 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2172 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2173 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2174 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2175 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2176 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2177 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2178 | seq_printf(m, "events: %u\n", |
b2655f26 | 2179 | ipmi_get_stat(intf, events)); |
07412736 | 2180 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2181 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2182 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2183 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2184 | return 0; |
2185 | } | |
1da177e4 | 2186 | |
07412736 AD |
2187 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2188 | { | |
d9dda78b | 2189 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2190 | } |
07412736 AD |
2191 | |
2192 | static const struct file_operations smi_stats_proc_ops = { | |
2193 | .open = smi_stats_proc_open, | |
2194 | .read = seq_read, | |
2195 | .llseek = seq_lseek, | |
2196 | .release = single_release, | |
2197 | }; | |
1aa16eea | 2198 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2199 | |
2200 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2201 | const struct file_operations *proc_ops, |
99b76233 | 2202 | void *data) |
1da177e4 | 2203 | { |
1da177e4 | 2204 | int rv = 0; |
3b625943 CM |
2205 | #ifdef CONFIG_PROC_FS |
2206 | struct proc_dir_entry *file; | |
1da177e4 LT |
2207 | struct ipmi_proc_entry *entry; |
2208 | ||
2209 | /* Create a list element. */ | |
2210 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2211 | if (!entry) | |
2212 | return -ENOMEM; | |
1b6b698f | 2213 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2214 | if (!entry->name) { |
2215 | kfree(entry); | |
2216 | return -ENOMEM; | |
2217 | } | |
1da177e4 | 2218 | |
07412736 | 2219 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2220 | if (!file) { |
2221 | kfree(entry->name); | |
2222 | kfree(entry); | |
2223 | rv = -ENOMEM; | |
2224 | } else { | |
ac019151 | 2225 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2226 | /* Stick it on the list. */ |
2227 | entry->next = smi->proc_entries; | |
2228 | smi->proc_entries = entry; | |
ac019151 | 2229 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2230 | } |
3b625943 | 2231 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2232 | |
2233 | return rv; | |
2234 | } | |
c70d7499 | 2235 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2236 | |
2237 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2238 | { | |
2239 | int rv = 0; | |
2240 | ||
3b625943 | 2241 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2242 | sprintf(smi->proc_dir_name, "%d", num); |
2243 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2244 | if (!smi->proc_dir) | |
2245 | rv = -ENOMEM; | |
1da177e4 LT |
2246 | |
2247 | if (rv == 0) | |
2248 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2249 | &smi_stats_proc_ops, |
99b76233 | 2250 | smi); |
1da177e4 LT |
2251 | |
2252 | if (rv == 0) | |
2253 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2254 | &smi_ipmb_proc_ops, |
99b76233 | 2255 | smi); |
1da177e4 LT |
2256 | |
2257 | if (rv == 0) | |
2258 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2259 | &smi_version_proc_ops, |
99b76233 | 2260 | smi); |
3b625943 | 2261 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2262 | |
2263 | return rv; | |
2264 | } | |
2265 | ||
2266 | static void remove_proc_entries(ipmi_smi_t smi) | |
2267 | { | |
3b625943 | 2268 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2269 | struct ipmi_proc_entry *entry; |
2270 | ||
ac019151 | 2271 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2272 | while (smi->proc_entries) { |
2273 | entry = smi->proc_entries; | |
2274 | smi->proc_entries = entry->next; | |
2275 | ||
2276 | remove_proc_entry(entry->name, smi->proc_dir); | |
2277 | kfree(entry->name); | |
2278 | kfree(entry); | |
2279 | } | |
ac019151 | 2280 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2281 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2282 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2283 | } |
2284 | ||
50c812b2 CM |
2285 | static ssize_t device_id_show(struct device *dev, |
2286 | struct device_attribute *attr, | |
2287 | char *buf) | |
2288 | { | |
16639eb0 | 2289 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2290 | |
2291 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2292 | } | |
9c633317 | 2293 | static DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL); |
50c812b2 | 2294 | |
16639eb0 CM |
2295 | static ssize_t provides_device_sdrs_show(struct device *dev, |
2296 | struct device_attribute *attr, | |
2297 | char *buf) | |
50c812b2 | 2298 | { |
16639eb0 | 2299 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2300 | |
2301 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2302 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 | 2303 | } |
9c633317 CM |
2304 | static DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, |
2305 | NULL); | |
50c812b2 CM |
2306 | |
2307 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2308 | char *buf) | |
2309 | { | |
16639eb0 | 2310 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2311 | |
2312 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2313 | bmc->id.device_revision & 0x0F); |
50c812b2 | 2314 | } |
9c633317 | 2315 | static DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL); |
50c812b2 | 2316 | |
16639eb0 CM |
2317 | static ssize_t firmware_revision_show(struct device *dev, |
2318 | struct device_attribute *attr, | |
2319 | char *buf) | |
50c812b2 | 2320 | { |
16639eb0 | 2321 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2322 | |
2323 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2324 | bmc->id.firmware_revision_2); | |
2325 | } | |
9c633317 | 2326 | static DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL); |
50c812b2 CM |
2327 | |
2328 | static ssize_t ipmi_version_show(struct device *dev, | |
2329 | struct device_attribute *attr, | |
2330 | char *buf) | |
2331 | { | |
16639eb0 | 2332 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2333 | |
2334 | return snprintf(buf, 20, "%u.%u\n", | |
2335 | ipmi_version_major(&bmc->id), | |
2336 | ipmi_version_minor(&bmc->id)); | |
2337 | } | |
9c633317 | 2338 | static DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL); |
50c812b2 CM |
2339 | |
2340 | static ssize_t add_dev_support_show(struct device *dev, | |
2341 | struct device_attribute *attr, | |
2342 | char *buf) | |
2343 | { | |
16639eb0 | 2344 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2345 | |
2346 | return snprintf(buf, 10, "0x%02x\n", | |
2347 | bmc->id.additional_device_support); | |
2348 | } | |
9c633317 CM |
2349 | static DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, |
2350 | NULL); | |
50c812b2 CM |
2351 | |
2352 | static ssize_t manufacturer_id_show(struct device *dev, | |
2353 | struct device_attribute *attr, | |
2354 | char *buf) | |
2355 | { | |
16639eb0 | 2356 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2357 | |
2358 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2359 | } | |
9c633317 | 2360 | static DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL); |
50c812b2 CM |
2361 | |
2362 | static ssize_t product_id_show(struct device *dev, | |
2363 | struct device_attribute *attr, | |
2364 | char *buf) | |
2365 | { | |
16639eb0 | 2366 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2367 | |
2368 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2369 | } | |
9c633317 | 2370 | static DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL); |
50c812b2 CM |
2371 | |
2372 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2373 | struct device_attribute *attr, | |
2374 | char *buf) | |
2375 | { | |
16639eb0 | 2376 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2377 | |
2378 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2379 | bmc->id.aux_firmware_revision[3], | |
2380 | bmc->id.aux_firmware_revision[2], | |
2381 | bmc->id.aux_firmware_revision[1], | |
2382 | bmc->id.aux_firmware_revision[0]); | |
2383 | } | |
9c633317 | 2384 | static DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL); |
50c812b2 CM |
2385 | |
2386 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2387 | char *buf) | |
2388 | { | |
16639eb0 | 2389 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 | 2390 | |
9b64a8ba CM |
2391 | return snprintf(buf, 100, |
2392 | "%2.2x%2.2x%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", | |
2393 | bmc->guid[3], bmc->guid[2], bmc->guid[1], bmc->guid[0], | |
2394 | bmc->guid[5], bmc->guid[4], bmc->guid[7], bmc->guid[6], | |
2395 | bmc->guid[8], bmc->guid[9], bmc->guid[10], bmc->guid[11], | |
2396 | bmc->guid[12], bmc->guid[13], bmc->guid[14], bmc->guid[15]); | |
50c812b2 | 2397 | } |
9c633317 | 2398 | static DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL); |
16639eb0 CM |
2399 | |
2400 | static struct attribute *bmc_dev_attrs[] = { | |
2401 | &dev_attr_device_id.attr, | |
2402 | &dev_attr_provides_device_sdrs.attr, | |
2403 | &dev_attr_revision.attr, | |
2404 | &dev_attr_firmware_revision.attr, | |
2405 | &dev_attr_ipmi_version.attr, | |
2406 | &dev_attr_additional_device_support.attr, | |
2407 | &dev_attr_manufacturer_id.attr, | |
2408 | &dev_attr_product_id.attr, | |
2d06a0c9 TI |
2409 | &dev_attr_aux_firmware_revision.attr, |
2410 | &dev_attr_guid.attr, | |
16639eb0 CM |
2411 | NULL |
2412 | }; | |
50c812b2 | 2413 | |
2d06a0c9 TI |
2414 | static umode_t bmc_dev_attr_is_visible(struct kobject *kobj, |
2415 | struct attribute *attr, int idx) | |
2416 | { | |
2417 | struct device *dev = kobj_to_dev(kobj); | |
2418 | struct bmc_device *bmc = to_bmc_device(dev); | |
2419 | umode_t mode = attr->mode; | |
2420 | ||
2421 | if (attr == &dev_attr_aux_firmware_revision.attr) | |
2422 | return bmc->id.aux_firmware_revision_set ? mode : 0; | |
2423 | if (attr == &dev_attr_guid.attr) | |
2424 | return bmc->guid_set ? mode : 0; | |
2425 | return mode; | |
2426 | } | |
2427 | ||
1e7a75f7 | 2428 | static const struct attribute_group bmc_dev_attr_group = { |
16639eb0 | 2429 | .attrs = bmc_dev_attrs, |
2d06a0c9 | 2430 | .is_visible = bmc_dev_attr_is_visible, |
16639eb0 | 2431 | }; |
5e59393e | 2432 | |
16639eb0 CM |
2433 | static const struct attribute_group *bmc_dev_attr_groups[] = { |
2434 | &bmc_dev_attr_group, | |
2435 | NULL | |
2436 | }; | |
2437 | ||
1e7a75f7 | 2438 | static const struct device_type bmc_device_type = { |
16639eb0 CM |
2439 | .groups = bmc_dev_attr_groups, |
2440 | }; | |
2441 | ||
f33e4df8 CM |
2442 | static int __find_bmc_guid(struct device *dev, void *data) |
2443 | { | |
2444 | unsigned char *id = data; | |
f33e4df8 | 2445 | |
eae4a36a CM |
2446 | if (dev->type != &bmc_device_type) |
2447 | return 0; | |
2448 | ||
2449 | return memcmp(to_bmc_device(dev)->guid, id, 16) == 0; | |
f33e4df8 CM |
2450 | } |
2451 | ||
9ca15af3 CM |
2452 | /* |
2453 | * Must be called with ipmidriver_mutex held. Returns with the | |
2454 | * bmc's usecount incremented, if it is non-NULL. | |
2455 | */ | |
f33e4df8 CM |
2456 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, |
2457 | unsigned char *guid) | |
2458 | { | |
2459 | struct device *dev; | |
9ca15af3 | 2460 | struct bmc_device *bmc = NULL; |
f33e4df8 CM |
2461 | |
2462 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
9ca15af3 CM |
2463 | if (dev) { |
2464 | bmc = to_bmc_device(dev); | |
2465 | kref_get(&bmc->usecount); | |
2466 | put_device(dev); | |
2467 | } | |
2468 | return bmc; | |
f33e4df8 CM |
2469 | } |
2470 | ||
2471 | struct prod_dev_id { | |
2472 | unsigned int product_id; | |
2473 | unsigned char device_id; | |
2474 | }; | |
2475 | ||
2476 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2477 | { | |
2478 | struct prod_dev_id *id = data; | |
eae4a36a CM |
2479 | struct bmc_device *bmc; |
2480 | ||
2481 | if (dev->type != &bmc_device_type) | |
2482 | return 0; | |
f33e4df8 | 2483 | |
eae4a36a | 2484 | bmc = to_bmc_device(dev); |
f33e4df8 CM |
2485 | return (bmc->id.product_id == id->product_id |
2486 | && bmc->id.device_id == id->device_id); | |
2487 | } | |
2488 | ||
9ca15af3 CM |
2489 | /* |
2490 | * Must be called with ipmidriver_mutex held. Returns with the | |
2491 | * bmc's usecount incremented, if it is non-NULL. | |
2492 | */ | |
f33e4df8 CM |
2493 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( |
2494 | struct device_driver *drv, | |
2495 | unsigned int product_id, unsigned char device_id) | |
2496 | { | |
2497 | struct prod_dev_id id = { | |
2498 | .product_id = product_id, | |
2499 | .device_id = device_id, | |
2500 | }; | |
2501 | struct device *dev; | |
9ca15af3 | 2502 | struct bmc_device *bmc = NULL; |
f33e4df8 CM |
2503 | |
2504 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
9ca15af3 CM |
2505 | if (dev) { |
2506 | bmc = to_bmc_device(dev); | |
2507 | kref_get(&bmc->usecount); | |
2508 | put_device(dev); | |
2509 | } | |
2510 | return bmc; | |
f33e4df8 CM |
2511 | } |
2512 | ||
16639eb0 CM |
2513 | static void |
2514 | release_bmc_device(struct device *dev) | |
2515 | { | |
2516 | kfree(to_bmc_device(dev)); | |
5e59393e JG |
2517 | } |
2518 | ||
2519 | static void | |
2520 | cleanup_bmc_device(struct kref *ref) | |
2521 | { | |
16639eb0 | 2522 | struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount); |
5e59393e | 2523 | |
16639eb0 | 2524 | platform_device_unregister(&bmc->pdev); |
50c812b2 CM |
2525 | } |
2526 | ||
2527 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2528 | { | |
2529 | struct bmc_device *bmc = intf->bmc; | |
2530 | ||
a2cb600f CM |
2531 | if (!intf->bmc_registered) |
2532 | return; | |
2533 | ||
5a0e10ec | 2534 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); |
a2cb600f CM |
2535 | sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name); |
2536 | kfree(intf->my_dev_name); | |
2537 | intf->my_dev_name = NULL; | |
50c812b2 CM |
2538 | |
2539 | mutex_lock(&ipmidriver_mutex); | |
16639eb0 | 2540 | kref_put(&bmc->usecount, cleanup_bmc_device); |
50c812b2 | 2541 | mutex_unlock(&ipmidriver_mutex); |
a2cb600f | 2542 | intf->bmc_registered = false; |
50c812b2 CM |
2543 | } |
2544 | ||
5a0e10ec | 2545 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) |
50c812b2 CM |
2546 | { |
2547 | int rv; | |
2548 | struct bmc_device *bmc = intf->bmc; | |
2549 | struct bmc_device *old_bmc; | |
50c812b2 | 2550 | |
50c812b2 CM |
2551 | /* |
2552 | * Try to find if there is an bmc_device struct | |
2553 | * representing the interfaced BMC already | |
2554 | */ | |
9ca15af3 | 2555 | mutex_lock(&ipmidriver_mutex); |
50c812b2 | 2556 | if (bmc->guid_set) |
fe2d5ffc | 2557 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2558 | else |
fe2d5ffc | 2559 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2560 | bmc->id.product_id, |
2561 | bmc->id.device_id); | |
9ca15af3 | 2562 | mutex_unlock(&ipmidriver_mutex); |
50c812b2 CM |
2563 | |
2564 | /* | |
2565 | * If there is already an bmc_device, free the new one, | |
2566 | * otherwise register the new BMC device | |
2567 | */ | |
2568 | if (old_bmc) { | |
2569 | kfree(bmc); | |
2570 | intf->bmc = old_bmc; | |
2571 | bmc = old_bmc; | |
2572 | ||
50c812b2 CM |
2573 | printk(KERN_INFO |
2574 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2575 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2576 | bmc->id.manufacturer_id, | |
2577 | bmc->id.product_id, | |
2578 | bmc->id.device_id); | |
2579 | } else { | |
f0b55da0 CM |
2580 | unsigned char orig_dev_id = bmc->id.device_id; |
2581 | int warn_printed = 0; | |
9ca15af3 | 2582 | struct bmc_device *tmp_bmc; |
f0b55da0 | 2583 | |
16639eb0 | 2584 | snprintf(bmc->name, sizeof(bmc->name), |
f0b55da0 | 2585 | "ipmi_bmc.%4.4x", bmc->id.product_id); |
16639eb0 | 2586 | bmc->pdev.name = bmc->name; |
f0b55da0 | 2587 | |
9ca15af3 CM |
2588 | mutex_lock(&ipmidriver_mutex); |
2589 | while ((tmp_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, | |
f0b55da0 | 2590 | bmc->id.product_id, |
9ca15af3 CM |
2591 | bmc->id.device_id))) { |
2592 | kref_put(&tmp_bmc->usecount, cleanup_bmc_device); | |
f0b55da0 CM |
2593 | if (!warn_printed) { |
2594 | printk(KERN_WARNING PFX | |
2595 | "This machine has two different BMCs" | |
2596 | " with the same product id and device" | |
2597 | " id. This is an error in the" | |
2598 | " firmware, but incrementing the" | |
2599 | " device id to work around the problem." | |
2600 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2601 | bmc->id.product_id, bmc->id.device_id); | |
2602 | warn_printed = 1; | |
2603 | } | |
2604 | bmc->id.device_id++; /* Wraps at 255 */ | |
2605 | if (bmc->id.device_id == orig_dev_id) { | |
2606 | printk(KERN_ERR PFX | |
2607 | "Out of device ids!\n"); | |
a2cb600f CM |
2608 | mutex_unlock(&ipmidriver_mutex); |
2609 | rv = -EAGAIN; | |
2610 | goto out; | |
f0b55da0 CM |
2611 | } |
2612 | } | |
2613 | ||
16639eb0 CM |
2614 | bmc->pdev.dev.driver = &ipmidriver.driver; |
2615 | bmc->pdev.id = bmc->id.device_id; | |
2616 | bmc->pdev.dev.release = release_bmc_device; | |
2617 | bmc->pdev.dev.type = &bmc_device_type; | |
5a0e10ec | 2618 | kref_init(&bmc->usecount); |
50c812b2 | 2619 | |
16639eb0 | 2620 | rv = platform_device_register(&bmc->pdev); |
50c812b2 CM |
2621 | mutex_unlock(&ipmidriver_mutex); |
2622 | if (rv) { | |
2623 | printk(KERN_ERR | |
2624 | "ipmi_msghandler:" | |
2625 | " Unable to register bmc device: %d\n", | |
2626 | rv); | |
a2cb600f | 2627 | goto out_list_del; |
50c812b2 CM |
2628 | } |
2629 | ||
279fbd0c MS |
2630 | dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, " |
2631 | "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2632 | bmc->id.manufacturer_id, | |
2633 | bmc->id.product_id, | |
2634 | bmc->id.device_id); | |
50c812b2 CM |
2635 | } |
2636 | ||
2637 | /* | |
2638 | * create symlink from system interface device to bmc device | |
2639 | * and back. | |
2640 | */ | |
5a0e10ec | 2641 | rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc"); |
50c812b2 CM |
2642 | if (rv) { |
2643 | printk(KERN_ERR | |
2644 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2645 | rv); | |
a2cb600f | 2646 | goto out_put_bmc; |
50c812b2 CM |
2647 | } |
2648 | ||
16639eb0 | 2649 | intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", ifnum); |
50c812b2 CM |
2650 | if (!intf->my_dev_name) { |
2651 | rv = -ENOMEM; | |
2652 | printk(KERN_ERR | |
2653 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2654 | rv); | |
a2cb600f | 2655 | goto out_unlink1; |
50c812b2 | 2656 | } |
50c812b2 | 2657 | |
16639eb0 | 2658 | rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj, |
50c812b2 CM |
2659 | intf->my_dev_name); |
2660 | if (rv) { | |
2661 | kfree(intf->my_dev_name); | |
2662 | intf->my_dev_name = NULL; | |
2663 | printk(KERN_ERR | |
2664 | "ipmi_msghandler:" | |
2665 | " Unable to create symlink to bmc: %d\n", | |
2666 | rv); | |
a2cb600f | 2667 | goto out_free_my_dev_name; |
50c812b2 CM |
2668 | } |
2669 | ||
a2cb600f | 2670 | intf->bmc_registered = true; |
50c812b2 | 2671 | |
a2cb600f | 2672 | out: |
50c812b2 | 2673 | return rv; |
a2cb600f CM |
2674 | |
2675 | ||
2676 | out_free_my_dev_name: | |
2677 | kfree(intf->my_dev_name); | |
2678 | intf->my_dev_name = NULL; | |
2679 | ||
2680 | out_unlink1: | |
2681 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); | |
2682 | ||
2683 | out_put_bmc: | |
2684 | mutex_lock(&ipmidriver_mutex); | |
2685 | intf->bmc = NULL; | |
2686 | kref_put(&bmc->usecount, cleanup_bmc_device); | |
2687 | mutex_unlock(&ipmidriver_mutex); | |
2688 | goto out; | |
2689 | ||
2690 | out_list_del: | |
2691 | mutex_lock(&ipmidriver_mutex); | |
2692 | intf->bmc = NULL; | |
2693 | mutex_unlock(&ipmidriver_mutex); | |
2694 | put_device(&bmc->pdev.dev); | |
2695 | goto out; | |
50c812b2 CM |
2696 | } |
2697 | ||
2698 | static int | |
2699 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2700 | { | |
2701 | struct kernel_ipmi_msg msg; | |
2702 | struct ipmi_system_interface_addr si; | |
2703 | ||
2704 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2705 | si.channel = IPMI_BMC_CHANNEL; | |
2706 | si.lun = 0; | |
2707 | ||
2708 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2709 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2710 | msg.data = NULL; | |
2711 | msg.data_len = 0; | |
2712 | return i_ipmi_request(NULL, | |
2713 | intf, | |
2714 | (struct ipmi_addr *) &si, | |
2715 | 0, | |
2716 | &msg, | |
2717 | intf, | |
2718 | NULL, | |
2719 | NULL, | |
2720 | 0, | |
2721 | intf->channels[0].address, | |
2722 | intf->channels[0].lun, | |
2723 | -1, 0); | |
2724 | } | |
2725 | ||
2726 | static void | |
2727 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2728 | { | |
2729 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2730 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2731 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2732 | /* Not for me */ | |
2733 | return; | |
2734 | ||
2735 | if (msg->msg.data[0] != 0) { | |
2736 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2737 | intf->bmc->guid_set = 0; | |
2738 | goto out; | |
2739 | } | |
2740 | ||
2741 | if (msg->msg.data_len < 17) { | |
2742 | intf->bmc->guid_set = 0; | |
2743 | printk(KERN_WARNING PFX | |
2744 | "guid_handler: The GUID response from the BMC was too" | |
2745 | " short, it was %d but should have been 17. Assuming" | |
2746 | " GUID is not available.\n", | |
2747 | msg->msg.data_len); | |
2748 | goto out; | |
2749 | } | |
2750 | ||
72630d9a | 2751 | memcpy(intf->bmc->guid, msg->msg.data + 1, 16); |
50c812b2 CM |
2752 | intf->bmc->guid_set = 1; |
2753 | out: | |
2754 | wake_up(&intf->waitq); | |
2755 | } | |
2756 | ||
2757 | static void | |
2758 | get_guid(ipmi_smi_t intf) | |
2759 | { | |
2760 | int rv; | |
2761 | ||
2762 | intf->bmc->guid_set = 0x2; | |
2763 | intf->null_user_handler = guid_handler; | |
2764 | rv = send_guid_cmd(intf, 0); | |
2765 | if (rv) | |
2766 | /* Send failed, no GUID available. */ | |
2767 | intf->bmc->guid_set = 0; | |
2768 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2769 | intf->null_user_handler = NULL; | |
2770 | } | |
2771 | ||
1da177e4 LT |
2772 | static int |
2773 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2774 | { | |
2775 | struct kernel_ipmi_msg msg; | |
2776 | unsigned char data[1]; | |
2777 | struct ipmi_system_interface_addr si; | |
2778 | ||
2779 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2780 | si.channel = IPMI_BMC_CHANNEL; | |
2781 | si.lun = 0; | |
2782 | ||
2783 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2784 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2785 | msg.data = data; | |
2786 | msg.data_len = 1; | |
2787 | data[0] = chan; | |
2788 | return i_ipmi_request(NULL, | |
2789 | intf, | |
2790 | (struct ipmi_addr *) &si, | |
2791 | 0, | |
2792 | &msg, | |
56a55ec6 | 2793 | intf, |
1da177e4 LT |
2794 | NULL, |
2795 | NULL, | |
2796 | 0, | |
c14979b9 CM |
2797 | intf->channels[0].address, |
2798 | intf->channels[0].lun, | |
1da177e4 LT |
2799 | -1, 0); |
2800 | } | |
2801 | ||
2802 | static void | |
56a55ec6 | 2803 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2804 | { |
2805 | int rv = 0; | |
2806 | int chan; | |
2807 | ||
56a55ec6 CM |
2808 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2809 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2810 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2811 | /* It's the one we want */ |
56a55ec6 | 2812 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2813 | /* Got an error from the channel, just go on. */ |
2814 | ||
56a55ec6 | 2815 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2816 | /* |
2817 | * If the MC does not support this | |
2818 | * command, that is legal. We just | |
2819 | * assume it has one IPMB at channel | |
2820 | * zero. | |
2821 | */ | |
1da177e4 LT |
2822 | intf->channels[0].medium |
2823 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2824 | intf->channels[0].protocol | |
2825 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2826 | |
2827 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2828 | wake_up(&intf->waitq); | |
2829 | goto out; | |
2830 | } | |
2831 | goto next_channel; | |
2832 | } | |
56a55ec6 | 2833 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2834 | /* Message not big enough, just go on. */ |
2835 | goto next_channel; | |
2836 | } | |
2837 | chan = intf->curr_channel; | |
56a55ec6 CM |
2838 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2839 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2840 | |
c70d7499 | 2841 | next_channel: |
1da177e4 LT |
2842 | intf->curr_channel++; |
2843 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2844 | wake_up(&intf->waitq); | |
2845 | else | |
2846 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2847 | ||
2848 | if (rv) { | |
2849 | /* Got an error somehow, just give up. */ | |
1f668423 CM |
2850 | printk(KERN_WARNING PFX |
2851 | "Error sending channel information for channel" | |
2852 | " %d: %d\n", intf->curr_channel, rv); | |
2853 | ||
1da177e4 LT |
2854 | intf->curr_channel = IPMI_MAX_CHANNELS; |
2855 | wake_up(&intf->waitq); | |
1da177e4 LT |
2856 | } |
2857 | } | |
2858 | out: | |
2859 | return; | |
2860 | } | |
2861 | ||
895dcfd1 | 2862 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 2863 | { |
fcfa4724 CM |
2864 | if (intf->handlers->poll) |
2865 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
2866 | /* In case something came in */ |
2867 | handle_new_recv_msgs(intf); | |
fcfa4724 | 2868 | } |
895dcfd1 CM |
2869 | |
2870 | void ipmi_poll_interface(ipmi_user_t user) | |
2871 | { | |
2872 | ipmi_poll(user->intf); | |
fcfa4724 | 2873 | } |
c70d7499 | 2874 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2875 | |
81d02b7f | 2876 | int ipmi_register_smi(const struct ipmi_smi_handlers *handlers, |
1da177e4 | 2877 | void *send_info, |
50c812b2 CM |
2878 | struct ipmi_device_id *device_id, |
2879 | struct device *si_dev, | |
453823ba | 2880 | unsigned char slave_addr) |
1da177e4 LT |
2881 | { |
2882 | int i, j; | |
2883 | int rv; | |
393d2cc3 | 2884 | ipmi_smi_t intf; |
bca0324d | 2885 | ipmi_smi_t tintf; |
bca0324d | 2886 | struct list_head *link; |
1da177e4 | 2887 | |
c70d7499 CM |
2888 | /* |
2889 | * Make sure the driver is actually initialized, this handles | |
2890 | * problems with initialization order. | |
2891 | */ | |
1da177e4 LT |
2892 | if (!initialized) { |
2893 | rv = ipmi_init_msghandler(); | |
2894 | if (rv) | |
2895 | return rv; | |
c70d7499 CM |
2896 | /* |
2897 | * The init code doesn't return an error if it was turned | |
2898 | * off, but it won't initialize. Check that. | |
2899 | */ | |
1da177e4 LT |
2900 | if (!initialized) |
2901 | return -ENODEV; | |
2902 | } | |
2903 | ||
dd00cc48 | 2904 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2905 | if (!intf) |
1da177e4 | 2906 | return -ENOMEM; |
b2c03941 CM |
2907 | |
2908 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2909 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2910 | ||
50c812b2 CM |
2911 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2912 | if (!intf->bmc) { | |
2913 | kfree(intf); | |
2914 | return -ENOMEM; | |
2915 | } | |
bca0324d | 2916 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2917 | kref_init(&intf->refcount); |
50c812b2 CM |
2918 | intf->bmc->id = *device_id; |
2919 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2920 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2921 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2922 | intf->channels[j].lun = 2; | |
2923 | } | |
2924 | if (slave_addr != 0) | |
2925 | intf->channels[0].address = slave_addr; | |
2926 | INIT_LIST_HEAD(&intf->users); | |
2927 | intf->handlers = handlers; | |
2928 | intf->send_info = send_info; | |
2929 | spin_lock_init(&intf->seq_lock); | |
2930 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2931 | intf->seq_table[j].inuse = 0; | |
2932 | intf->seq_table[j].seqid = 0; | |
2933 | } | |
2934 | intf->curr_seq = 0; | |
2935 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2936 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 | 2937 | #endif |
65be7544 CM |
2938 | spin_lock_init(&intf->waiting_rcv_msgs_lock); |
2939 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
7adf579c CM |
2940 | tasklet_init(&intf->recv_tasklet, |
2941 | smi_recv_tasklet, | |
2942 | (unsigned long) intf); | |
2943 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
7ea0ed2b CM |
2944 | spin_lock_init(&intf->xmit_msgs_lock); |
2945 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
2946 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
393d2cc3 | 2947 | spin_lock_init(&intf->events_lock); |
89986496 CM |
2948 | atomic_set(&intf->event_waiters, 0); |
2949 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
2950 | INIT_LIST_HEAD(&intf->waiting_events); |
2951 | intf->waiting_events_count = 0; | |
d6dfd131 | 2952 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2953 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2954 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2955 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2956 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2957 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2958 | |
393d2cc3 | 2959 | intf->proc_dir = NULL; |
1da177e4 | 2960 | |
b2c03941 | 2961 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2962 | mutex_lock(&ipmi_interfaces_mutex); |
2963 | /* Look for a hole in the numbers. */ | |
2964 | i = 0; | |
2965 | link = &ipmi_interfaces; | |
2966 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2967 | if (tintf->intf_num != i) { | |
2968 | link = &tintf->link; | |
1da177e4 LT |
2969 | break; |
2970 | } | |
bca0324d | 2971 | i++; |
1da177e4 | 2972 | } |
bca0324d CM |
2973 | /* Add the new interface in numeric order. */ |
2974 | if (i == 0) | |
2975 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2976 | else | |
2977 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2978 | |
453823ba CM |
2979 | rv = handlers->start_processing(send_info, intf); |
2980 | if (rv) | |
2981 | goto out; | |
1da177e4 | 2982 | |
50c812b2 CM |
2983 | get_guid(intf); |
2984 | ||
a2cb600f CM |
2985 | rv = ipmi_bmc_register(intf, i); |
2986 | if (rv) | |
2987 | goto out; | |
2988 | ||
b2c03941 | 2989 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2990 | || ((intf->ipmi_version_major == 1) |
2991 | && (intf->ipmi_version_minor >= 5))) { | |
2992 | /* | |
2993 | * Start scanning the channels to see what is | |
2994 | * available. | |
2995 | */ | |
393d2cc3 CM |
2996 | intf->null_user_handler = channel_handler; |
2997 | intf->curr_channel = 0; | |
2998 | rv = send_channel_info_cmd(intf, 0); | |
1f668423 CM |
2999 | if (rv) { |
3000 | printk(KERN_WARNING PFX | |
3001 | "Error sending channel information for channel" | |
3002 | " 0, %d\n", rv); | |
393d2cc3 | 3003 | goto out; |
1f668423 | 3004 | } |
1da177e4 | 3005 | |
393d2cc3 CM |
3006 | /* Wait for the channel info to be read. */ |
3007 | wait_event(intf->waitq, | |
3008 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 3009 | intf->null_user_handler = NULL; |
393d2cc3 CM |
3010 | } else { |
3011 | /* Assume a single IPMB channel at zero. */ | |
3012 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
3013 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
9a2845c4 | 3014 | intf->curr_channel = IPMI_MAX_CHANNELS; |
1da177e4 LT |
3015 | } |
3016 | ||
a2cb600f | 3017 | rv = add_proc_entries(intf, i); |
1da177e4 | 3018 | |
393d2cc3 | 3019 | out: |
1da177e4 | 3020 | if (rv) { |
a2cb600f | 3021 | ipmi_bmc_unregister(intf); |
393d2cc3 CM |
3022 | if (intf->proc_dir) |
3023 | remove_proc_entries(intf); | |
b2c03941 | 3024 | intf->handlers = NULL; |
bca0324d CM |
3025 | list_del_rcu(&intf->link); |
3026 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 3027 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 3028 | synchronize_rcu(); |
393d2cc3 | 3029 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 3030 | } else { |
78ba2faf CM |
3031 | /* |
3032 | * Keep memory order straight for RCU readers. Make | |
3033 | * sure everything else is committed to memory before | |
3034 | * setting intf_num to mark the interface valid. | |
3035 | */ | |
3036 | smp_wmb(); | |
bca0324d CM |
3037 | intf->intf_num = i; |
3038 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 3039 | /* After this point the interface is legal to use. */ |
50c812b2 | 3040 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 3041 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
3042 | } |
3043 | ||
3044 | return rv; | |
3045 | } | |
c70d7499 | 3046 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 3047 | |
7ea0ed2b CM |
3048 | static void deliver_smi_err_response(ipmi_smi_t intf, |
3049 | struct ipmi_smi_msg *msg, | |
3050 | unsigned char err) | |
3051 | { | |
3052 | msg->rsp[0] = msg->data[0] | 4; | |
3053 | msg->rsp[1] = msg->data[1]; | |
3054 | msg->rsp[2] = err; | |
3055 | msg->rsp_size = 3; | |
3056 | /* It's an error, so it will never requeue, no need to check return. */ | |
3057 | handle_one_recv_msg(intf, msg); | |
3058 | } | |
3059 | ||
b2c03941 CM |
3060 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
3061 | { | |
3062 | int i; | |
3063 | struct seq_table *ent; | |
7ea0ed2b CM |
3064 | struct ipmi_smi_msg *msg; |
3065 | struct list_head *entry; | |
3066 | struct list_head tmplist; | |
3067 | ||
3068 | /* Clear out our transmit queues and hold the messages. */ | |
3069 | INIT_LIST_HEAD(&tmplist); | |
3070 | list_splice_tail(&intf->hp_xmit_msgs, &tmplist); | |
3071 | list_splice_tail(&intf->xmit_msgs, &tmplist); | |
3072 | ||
3073 | /* Current message first, to preserve order */ | |
3074 | while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) { | |
3075 | /* Wait for the message to clear out. */ | |
3076 | schedule_timeout(1); | |
3077 | } | |
b2c03941 CM |
3078 | |
3079 | /* No need for locks, the interface is down. */ | |
7ea0ed2b CM |
3080 | |
3081 | /* | |
3082 | * Return errors for all pending messages in queue and in the | |
3083 | * tables waiting for remote responses. | |
3084 | */ | |
3085 | while (!list_empty(&tmplist)) { | |
3086 | entry = tmplist.next; | |
3087 | list_del(entry); | |
3088 | msg = list_entry(entry, struct ipmi_smi_msg, link); | |
3089 | deliver_smi_err_response(intf, msg, IPMI_ERR_UNSPECIFIED); | |
3090 | } | |
3091 | ||
b2c03941 CM |
3092 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
3093 | ent = &(intf->seq_table[i]); | |
3094 | if (!ent->inuse) | |
3095 | continue; | |
3096 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
3097 | } | |
3098 | } | |
3099 | ||
1da177e4 LT |
3100 | int ipmi_unregister_smi(ipmi_smi_t intf) |
3101 | { | |
1da177e4 | 3102 | struct ipmi_smi_watcher *w; |
7ea0ed2b CM |
3103 | int intf_num = intf->intf_num; |
3104 | ipmi_user_t user; | |
1da177e4 | 3105 | |
b2c03941 | 3106 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 3107 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 | 3108 | intf->intf_num = -1; |
7ea0ed2b | 3109 | intf->in_shutdown = true; |
bca0324d CM |
3110 | list_del_rcu(&intf->link); |
3111 | mutex_unlock(&ipmi_interfaces_mutex); | |
3112 | synchronize_rcu(); | |
1da177e4 | 3113 | |
b2c03941 CM |
3114 | cleanup_smi_msgs(intf); |
3115 | ||
7ea0ed2b CM |
3116 | /* Clean up the effects of users on the lower-level software. */ |
3117 | mutex_lock(&ipmi_interfaces_mutex); | |
3118 | rcu_read_lock(); | |
3119 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3120 | module_put(intf->handlers->owner); | |
3121 | if (intf->handlers->dec_usecount) | |
3122 | intf->handlers->dec_usecount(intf->send_info); | |
3123 | } | |
3124 | rcu_read_unlock(); | |
3125 | intf->handlers = NULL; | |
3126 | mutex_unlock(&ipmi_interfaces_mutex); | |
3127 | ||
393d2cc3 | 3128 | remove_proc_entries(intf); |
bd85f4b3 | 3129 | ipmi_bmc_unregister(intf); |
1da177e4 | 3130 | |
c70d7499 CM |
3131 | /* |
3132 | * Call all the watcher interfaces to tell them that | |
3133 | * an interface is gone. | |
3134 | */ | |
393d2cc3 | 3135 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3136 | w->smi_gone(intf_num); |
3137 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3138 | |
393d2cc3 | 3139 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3140 | return 0; |
3141 | } | |
c70d7499 | 3142 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3143 | |
3144 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3145 | struct ipmi_smi_msg *msg) | |
3146 | { | |
3147 | struct ipmi_ipmb_addr ipmb_addr; | |
3148 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3149 | |
c70d7499 CM |
3150 | /* |
3151 | * This is 11, not 10, because the response must contain a | |
3152 | * completion code. | |
3153 | */ | |
1da177e4 LT |
3154 | if (msg->rsp_size < 11) { |
3155 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3156 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3157 | return 0; |
3158 | } | |
3159 | ||
3160 | if (msg->rsp[2] != 0) { | |
3161 | /* An error getting the response, just ignore it. */ | |
3162 | return 0; | |
3163 | } | |
3164 | ||
3165 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3166 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3167 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3168 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3169 | ||
c70d7499 CM |
3170 | /* |
3171 | * It's a response from a remote entity. Look up the sequence | |
3172 | * number and handle the response. | |
3173 | */ | |
1da177e4 LT |
3174 | if (intf_find_seq(intf, |
3175 | msg->rsp[7] >> 2, | |
3176 | msg->rsp[3] & 0x0f, | |
3177 | msg->rsp[8], | |
3178 | (msg->rsp[4] >> 2) & (~1), | |
3179 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3180 | &recv_msg)) { |
3181 | /* | |
3182 | * We were unable to find the sequence number, | |
3183 | * so just nuke the message. | |
3184 | */ | |
b2655f26 | 3185 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3186 | return 0; |
3187 | } | |
3188 | ||
3189 | memcpy(recv_msg->msg_data, | |
3190 | &(msg->rsp[9]), | |
3191 | msg->rsp_size - 9); | |
c70d7499 CM |
3192 | /* |
3193 | * The other fields matched, so no need to set them, except | |
3194 | * for netfn, which needs to be the response that was | |
3195 | * returned, not the request value. | |
3196 | */ | |
1da177e4 LT |
3197 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3198 | recv_msg->msg.data = recv_msg->msg_data; | |
3199 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3200 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3201 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3202 | deliver_response(recv_msg); |
3203 | ||
3204 | return 0; | |
3205 | } | |
3206 | ||
3207 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3208 | struct ipmi_smi_msg *msg) | |
3209 | { | |
393d2cc3 CM |
3210 | struct cmd_rcvr *rcvr; |
3211 | int rv = 0; | |
3212 | unsigned char netfn; | |
3213 | unsigned char cmd; | |
c69c3127 | 3214 | unsigned char chan; |
393d2cc3 CM |
3215 | ipmi_user_t user = NULL; |
3216 | struct ipmi_ipmb_addr *ipmb_addr; | |
3217 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3218 | |
3219 | if (msg->rsp_size < 10) { | |
3220 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3221 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3222 | return 0; |
3223 | } | |
3224 | ||
3225 | if (msg->rsp[2] != 0) { | |
3226 | /* An error getting the response, just ignore it. */ | |
3227 | return 0; | |
3228 | } | |
3229 | ||
3230 | netfn = msg->rsp[4] >> 2; | |
3231 | cmd = msg->rsp[8]; | |
c69c3127 | 3232 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3233 | |
e61fb5b6 | 3234 | rcu_read_lock(); |
c69c3127 | 3235 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3236 | if (rcvr) { |
3237 | user = rcvr->user; | |
3238 | kref_get(&user->refcount); | |
3239 | } else | |
3240 | user = NULL; | |
e61fb5b6 | 3241 | rcu_read_unlock(); |
1da177e4 LT |
3242 | |
3243 | if (user == NULL) { | |
3244 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3245 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3246 | |
3247 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3248 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3249 | msg->data[2] = msg->rsp[3]; | |
3250 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3251 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3252 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3253 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3254 | /* rqseq/lun */ |
3255 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3256 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3257 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3258 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3259 | msg->data_size = 11; | |
3260 | ||
3261 | #ifdef DEBUG_MSGING | |
3262 | { | |
3263 | int m; | |
3264 | printk("Invalid command:"); | |
e8b33617 | 3265 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3266 | printk(" %2.2x", msg->data[m]); |
3267 | printk("\n"); | |
3268 | } | |
3269 | #endif | |
b2c03941 | 3270 | rcu_read_lock(); |
7ea0ed2b CM |
3271 | if (!intf->in_shutdown) { |
3272 | smi_send(intf, intf->handlers, msg, 0); | |
c70d7499 CM |
3273 | /* |
3274 | * We used the message, so return the value | |
3275 | * that causes it to not be freed or | |
3276 | * queued. | |
3277 | */ | |
b2c03941 CM |
3278 | rv = -1; |
3279 | } | |
3280 | rcu_read_unlock(); | |
1da177e4 LT |
3281 | } else { |
3282 | /* Deliver the message to the user. */ | |
b2655f26 | 3283 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3284 | |
3285 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3286 | if (!recv_msg) { |
c70d7499 CM |
3287 | /* |
3288 | * We couldn't allocate memory for the | |
3289 | * message, so requeue it for handling | |
3290 | * later. | |
3291 | */ | |
1da177e4 | 3292 | rv = 1; |
393d2cc3 | 3293 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3294 | } else { |
3295 | /* Extract the source address from the data. */ | |
3296 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3297 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3298 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3299 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3300 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3301 | ||
c70d7499 CM |
3302 | /* |
3303 | * Extract the rest of the message information | |
3304 | * from the IPMB header. | |
3305 | */ | |
1da177e4 LT |
3306 | recv_msg->user = user; |
3307 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3308 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3309 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3310 | recv_msg->msg.cmd = msg->rsp[8]; | |
3311 | recv_msg->msg.data = recv_msg->msg_data; | |
3312 | ||
c70d7499 CM |
3313 | /* |
3314 | * We chop off 10, not 9 bytes because the checksum | |
3315 | * at the end also needs to be removed. | |
3316 | */ | |
1da177e4 LT |
3317 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3318 | memcpy(recv_msg->msg_data, | |
3319 | &(msg->rsp[9]), | |
3320 | msg->rsp_size - 10); | |
3321 | deliver_response(recv_msg); | |
3322 | } | |
3323 | } | |
3324 | ||
3325 | return rv; | |
3326 | } | |
3327 | ||
3328 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3329 | struct ipmi_smi_msg *msg) | |
3330 | { | |
3331 | struct ipmi_lan_addr lan_addr; | |
3332 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3333 | |
3334 | ||
c70d7499 CM |
3335 | /* |
3336 | * This is 13, not 12, because the response must contain a | |
3337 | * completion code. | |
3338 | */ | |
1da177e4 LT |
3339 | if (msg->rsp_size < 13) { |
3340 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3341 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3342 | return 0; |
3343 | } | |
3344 | ||
3345 | if (msg->rsp[2] != 0) { | |
3346 | /* An error getting the response, just ignore it. */ | |
3347 | return 0; | |
3348 | } | |
3349 | ||
3350 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3351 | lan_addr.session_handle = msg->rsp[4]; | |
3352 | lan_addr.remote_SWID = msg->rsp[8]; | |
3353 | lan_addr.local_SWID = msg->rsp[5]; | |
3354 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3355 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3356 | lan_addr.lun = msg->rsp[9] & 3; | |
3357 | ||
c70d7499 CM |
3358 | /* |
3359 | * It's a response from a remote entity. Look up the sequence | |
3360 | * number and handle the response. | |
3361 | */ | |
1da177e4 LT |
3362 | if (intf_find_seq(intf, |
3363 | msg->rsp[9] >> 2, | |
3364 | msg->rsp[3] & 0x0f, | |
3365 | msg->rsp[10], | |
3366 | (msg->rsp[6] >> 2) & (~1), | |
3367 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3368 | &recv_msg)) { |
3369 | /* | |
3370 | * We were unable to find the sequence number, | |
3371 | * so just nuke the message. | |
3372 | */ | |
b2655f26 | 3373 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3374 | return 0; |
3375 | } | |
3376 | ||
3377 | memcpy(recv_msg->msg_data, | |
3378 | &(msg->rsp[11]), | |
3379 | msg->rsp_size - 11); | |
c70d7499 CM |
3380 | /* |
3381 | * The other fields matched, so no need to set them, except | |
3382 | * for netfn, which needs to be the response that was | |
3383 | * returned, not the request value. | |
3384 | */ | |
1da177e4 LT |
3385 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3386 | recv_msg->msg.data = recv_msg->msg_data; | |
3387 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3388 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3389 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3390 | deliver_response(recv_msg); |
3391 | ||
3392 | return 0; | |
3393 | } | |
3394 | ||
3395 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3396 | struct ipmi_smi_msg *msg) | |
3397 | { | |
393d2cc3 CM |
3398 | struct cmd_rcvr *rcvr; |
3399 | int rv = 0; | |
3400 | unsigned char netfn; | |
3401 | unsigned char cmd; | |
c69c3127 | 3402 | unsigned char chan; |
393d2cc3 CM |
3403 | ipmi_user_t user = NULL; |
3404 | struct ipmi_lan_addr *lan_addr; | |
3405 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3406 | |
3407 | if (msg->rsp_size < 12) { | |
3408 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3409 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3410 | return 0; |
3411 | } | |
3412 | ||
3413 | if (msg->rsp[2] != 0) { | |
3414 | /* An error getting the response, just ignore it. */ | |
3415 | return 0; | |
3416 | } | |
3417 | ||
3418 | netfn = msg->rsp[6] >> 2; | |
3419 | cmd = msg->rsp[10]; | |
c69c3127 | 3420 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3421 | |
e61fb5b6 | 3422 | rcu_read_lock(); |
c69c3127 | 3423 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3424 | if (rcvr) { |
3425 | user = rcvr->user; | |
3426 | kref_get(&user->refcount); | |
3427 | } else | |
3428 | user = NULL; | |
e61fb5b6 | 3429 | rcu_read_unlock(); |
1da177e4 LT |
3430 | |
3431 | if (user == NULL) { | |
393d2cc3 | 3432 | /* We didn't find a user, just give up. */ |
b2655f26 | 3433 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3434 | |
c70d7499 CM |
3435 | /* |
3436 | * Don't do anything with these messages, just allow | |
3437 | * them to be freed. | |
3438 | */ | |
3439 | rv = 0; | |
1da177e4 LT |
3440 | } else { |
3441 | /* Deliver the message to the user. */ | |
b2655f26 | 3442 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3443 | |
3444 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3445 | if (!recv_msg) { |
c70d7499 CM |
3446 | /* |
3447 | * We couldn't allocate memory for the | |
3448 | * message, so requeue it for handling later. | |
3449 | */ | |
1da177e4 | 3450 | rv = 1; |
393d2cc3 | 3451 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3452 | } else { |
3453 | /* Extract the source address from the data. */ | |
3454 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3455 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3456 | lan_addr->session_handle = msg->rsp[4]; | |
3457 | lan_addr->remote_SWID = msg->rsp[8]; | |
3458 | lan_addr->local_SWID = msg->rsp[5]; | |
3459 | lan_addr->lun = msg->rsp[9] & 3; | |
3460 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3461 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3462 | ||
c70d7499 CM |
3463 | /* |
3464 | * Extract the rest of the message information | |
3465 | * from the IPMB header. | |
3466 | */ | |
1da177e4 LT |
3467 | recv_msg->user = user; |
3468 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3469 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3470 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3471 | recv_msg->msg.cmd = msg->rsp[10]; | |
3472 | recv_msg->msg.data = recv_msg->msg_data; | |
3473 | ||
c70d7499 CM |
3474 | /* |
3475 | * We chop off 12, not 11 bytes because the checksum | |
3476 | * at the end also needs to be removed. | |
3477 | */ | |
1da177e4 LT |
3478 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3479 | memcpy(recv_msg->msg_data, | |
3480 | &(msg->rsp[11]), | |
3481 | msg->rsp_size - 12); | |
3482 | deliver_response(recv_msg); | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | return rv; | |
3487 | } | |
3488 | ||
4dec302f | 3489 | /* |
3490 | * This routine will handle "Get Message" command responses with | |
3491 | * channels that use an OEM Medium. The message format belongs to | |
3492 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3493 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3494 | */ | |
3495 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3496 | struct ipmi_smi_msg *msg) | |
3497 | { | |
3498 | struct cmd_rcvr *rcvr; | |
3499 | int rv = 0; | |
3500 | unsigned char netfn; | |
3501 | unsigned char cmd; | |
3502 | unsigned char chan; | |
3503 | ipmi_user_t user = NULL; | |
3504 | struct ipmi_system_interface_addr *smi_addr; | |
3505 | struct ipmi_recv_msg *recv_msg; | |
3506 | ||
3507 | /* | |
3508 | * We expect the OEM SW to perform error checking | |
3509 | * so we just do some basic sanity checks | |
3510 | */ | |
3511 | if (msg->rsp_size < 4) { | |
3512 | /* Message not big enough, just ignore it. */ | |
3513 | ipmi_inc_stat(intf, invalid_commands); | |
3514 | return 0; | |
3515 | } | |
3516 | ||
3517 | if (msg->rsp[2] != 0) { | |
3518 | /* An error getting the response, just ignore it. */ | |
3519 | return 0; | |
3520 | } | |
3521 | ||
3522 | /* | |
3523 | * This is an OEM Message so the OEM needs to know how | |
3524 | * handle the message. We do no interpretation. | |
3525 | */ | |
3526 | netfn = msg->rsp[0] >> 2; | |
3527 | cmd = msg->rsp[1]; | |
3528 | chan = msg->rsp[3] & 0xf; | |
3529 | ||
3530 | rcu_read_lock(); | |
3531 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3532 | if (rcvr) { | |
3533 | user = rcvr->user; | |
3534 | kref_get(&user->refcount); | |
3535 | } else | |
3536 | user = NULL; | |
3537 | rcu_read_unlock(); | |
3538 | ||
3539 | if (user == NULL) { | |
3540 | /* We didn't find a user, just give up. */ | |
3541 | ipmi_inc_stat(intf, unhandled_commands); | |
3542 | ||
3543 | /* | |
3544 | * Don't do anything with these messages, just allow | |
3545 | * them to be freed. | |
3546 | */ | |
3547 | ||
3548 | rv = 0; | |
3549 | } else { | |
3550 | /* Deliver the message to the user. */ | |
3551 | ipmi_inc_stat(intf, handled_commands); | |
3552 | ||
3553 | recv_msg = ipmi_alloc_recv_msg(); | |
3554 | if (!recv_msg) { | |
3555 | /* | |
3556 | * We couldn't allocate memory for the | |
3557 | * message, so requeue it for handling | |
3558 | * later. | |
3559 | */ | |
3560 | rv = 1; | |
3561 | kref_put(&user->refcount, free_user); | |
3562 | } else { | |
3563 | /* | |
3564 | * OEM Messages are expected to be delivered via | |
3565 | * the system interface to SMS software. We might | |
3566 | * need to visit this again depending on OEM | |
3567 | * requirements | |
3568 | */ | |
3569 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3570 | &(recv_msg->addr)); | |
3571 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3572 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3573 | smi_addr->lun = msg->rsp[0] & 3; | |
3574 | ||
3575 | recv_msg->user = user; | |
3576 | recv_msg->user_msg_data = NULL; | |
3577 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
3578 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3579 | recv_msg->msg.cmd = msg->rsp[1]; | |
3580 | recv_msg->msg.data = recv_msg->msg_data; | |
3581 | ||
3582 | /* | |
3583 | * The message starts at byte 4 which follows the | |
3584 | * the Channel Byte in the "GET MESSAGE" command | |
3585 | */ | |
3586 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
3587 | memcpy(recv_msg->msg_data, | |
3588 | &(msg->rsp[4]), | |
3589 | msg->rsp_size - 4); | |
3590 | deliver_response(recv_msg); | |
3591 | } | |
3592 | } | |
3593 | ||
3594 | return rv; | |
3595 | } | |
3596 | ||
1da177e4 LT |
3597 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
3598 | struct ipmi_smi_msg *msg) | |
3599 | { | |
3600 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3601 | |
1da177e4 LT |
3602 | recv_msg->msgid = 0; |
3603 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3604 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3605 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3606 | smi_addr->lun = msg->rsp[0] & 3; | |
3607 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3608 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3609 | recv_msg->msg.cmd = msg->rsp[1]; | |
3610 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3611 | recv_msg->msg.data = recv_msg->msg_data; | |
3612 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3613 | } | |
3614 | ||
1da177e4 LT |
3615 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3616 | struct ipmi_smi_msg *msg) | |
3617 | { | |
3618 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3619 | struct list_head msgs; | |
3620 | ipmi_user_t user; | |
3621 | int rv = 0; | |
3622 | int deliver_count = 0; | |
3623 | unsigned long flags; | |
3624 | ||
3625 | if (msg->rsp_size < 19) { | |
3626 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3627 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3628 | return 0; |
3629 | } | |
3630 | ||
3631 | if (msg->rsp[2] != 0) { | |
3632 | /* An error getting the event, just ignore it. */ | |
3633 | return 0; | |
3634 | } | |
3635 | ||
3636 | INIT_LIST_HEAD(&msgs); | |
3637 | ||
393d2cc3 | 3638 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3639 | |
b2655f26 | 3640 | ipmi_inc_stat(intf, events); |
1da177e4 | 3641 | |
c70d7499 CM |
3642 | /* |
3643 | * Allocate and fill in one message for every user that is | |
3644 | * getting events. | |
3645 | */ | |
393d2cc3 CM |
3646 | rcu_read_lock(); |
3647 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3648 | if (!user->gets_events) |
1da177e4 LT |
3649 | continue; |
3650 | ||
3651 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3652 | if (!recv_msg) { |
393d2cc3 | 3653 | rcu_read_unlock(); |
8a3628d5 CM |
3654 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3655 | link) { | |
1da177e4 LT |
3656 | list_del(&recv_msg->link); |
3657 | ipmi_free_recv_msg(recv_msg); | |
3658 | } | |
c70d7499 CM |
3659 | /* |
3660 | * We couldn't allocate memory for the | |
3661 | * message, so requeue it for handling | |
3662 | * later. | |
3663 | */ | |
1da177e4 LT |
3664 | rv = 1; |
3665 | goto out; | |
3666 | } | |
3667 | ||
3668 | deliver_count++; | |
3669 | ||
3670 | copy_event_into_recv_msg(recv_msg, msg); | |
3671 | recv_msg->user = user; | |
393d2cc3 | 3672 | kref_get(&user->refcount); |
1da177e4 LT |
3673 | list_add_tail(&(recv_msg->link), &msgs); |
3674 | } | |
393d2cc3 | 3675 | rcu_read_unlock(); |
1da177e4 LT |
3676 | |
3677 | if (deliver_count) { | |
3678 | /* Now deliver all the messages. */ | |
3679 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3680 | list_del(&recv_msg->link); | |
3681 | deliver_response(recv_msg); | |
3682 | } | |
3683 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3684 | /* |
3685 | * No one to receive the message, put it in queue if there's | |
3686 | * not already too many things in the queue. | |
3687 | */ | |
1da177e4 | 3688 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3689 | if (!recv_msg) { |
c70d7499 CM |
3690 | /* |
3691 | * We couldn't allocate memory for the | |
3692 | * message, so requeue it for handling | |
3693 | * later. | |
3694 | */ | |
1da177e4 LT |
3695 | rv = 1; |
3696 | goto out; | |
3697 | } | |
3698 | ||
3699 | copy_event_into_recv_msg(recv_msg, msg); | |
3700 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3701 | intf->waiting_events_count++; |
87ebd06f | 3702 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3703 | /* |
3704 | * There's too many things in the queue, discard this | |
3705 | * message. | |
3706 | */ | |
87ebd06f CM |
3707 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3708 | " incoming events\n"); | |
3709 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3710 | } |
3711 | ||
3712 | out: | |
3713 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3714 | ||
3715 | return rv; | |
3716 | } | |
3717 | ||
3718 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3719 | struct ipmi_smi_msg *msg) | |
3720 | { | |
3721 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3722 | struct ipmi_user *user; |
1da177e4 LT |
3723 | |
3724 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3725 | if (recv_msg == NULL) { |
3726 | printk(KERN_WARNING | |
3727 | "IPMI message received with no owner. This\n" | |
3728 | "could be because of a malformed message, or\n" | |
3729 | "because of a hardware error. Contact your\n" | |
3730 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3731 | return 0; |
3732 | } | |
1da177e4 | 3733 | |
393d2cc3 | 3734 | user = recv_msg->user; |
1da177e4 | 3735 | /* Make sure the user still exists. */ |
393d2cc3 | 3736 | if (user && !user->valid) { |
56a55ec6 | 3737 | /* The user for the message went away, so give up. */ |
b2655f26 | 3738 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3739 | ipmi_free_recv_msg(recv_msg); |
3740 | } else { | |
3741 | struct ipmi_system_interface_addr *smi_addr; | |
3742 | ||
b2655f26 | 3743 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3744 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3745 | recv_msg->msgid = msg->msgid; | |
3746 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3747 | &(recv_msg->addr)); | |
3748 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3749 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3750 | smi_addr->lun = msg->rsp[0] & 3; | |
3751 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3752 | recv_msg->msg.cmd = msg->rsp[1]; | |
3753 | memcpy(recv_msg->msg_data, | |
3754 | &(msg->rsp[2]), | |
3755 | msg->rsp_size - 2); | |
3756 | recv_msg->msg.data = recv_msg->msg_data; | |
3757 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3758 | deliver_response(recv_msg); | |
3759 | } | |
3760 | ||
3761 | return 0; | |
3762 | } | |
3763 | ||
c70d7499 | 3764 | /* |
7adf579c | 3765 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
3766 | * 0 if the message should be freed, or -1 if the message should not |
3767 | * be freed or requeued. | |
3768 | */ | |
7adf579c | 3769 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
3770 | struct ipmi_smi_msg *msg) |
3771 | { | |
3772 | int requeue; | |
3773 | int chan; | |
3774 | ||
3775 | #ifdef DEBUG_MSGING | |
3776 | int m; | |
3777 | printk("Recv:"); | |
e8b33617 | 3778 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3779 | printk(" %2.2x", msg->rsp[m]); |
3780 | printk("\n"); | |
3781 | #endif | |
3782 | if (msg->rsp_size < 2) { | |
3783 | /* Message is too small to be correct. */ | |
3784 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3785 | " for netfn %x cmd %x, got %d bytes\n", | |
3786 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3787 | ||
3788 | /* Generate an error response for the message. */ | |
3789 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3790 | msg->rsp[1] = msg->data[1]; | |
3791 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3792 | msg->rsp_size = 3; | |
c70d7499 CM |
3793 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3794 | || (msg->rsp[1] != msg->data[1])) { | |
3795 | /* | |
3796 | * The NetFN and Command in the response is not even | |
3797 | * marginally correct. | |
3798 | */ | |
1da177e4 LT |
3799 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3800 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3801 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3802 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3803 | ||
3804 | /* Generate an error response for the message. */ | |
3805 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3806 | msg->rsp[1] = msg->data[1]; | |
3807 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3808 | msg->rsp_size = 3; | |
3809 | } | |
3810 | ||
3811 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3812 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3813 | && (msg->user_data != NULL)) { |
3814 | /* | |
3815 | * It's a response to a response we sent. For this we | |
3816 | * deliver a send message response to the user. | |
3817 | */ | |
393d2cc3 | 3818 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3819 | |
3820 | requeue = 0; | |
3821 | if (msg->rsp_size < 2) | |
3822 | /* Message is too small to be correct. */ | |
3823 | goto out; | |
3824 | ||
3825 | chan = msg->data[2] & 0x0f; | |
3826 | if (chan >= IPMI_MAX_CHANNELS) | |
3827 | /* Invalid channel number */ | |
3828 | goto out; | |
3829 | ||
393d2cc3 CM |
3830 | if (!recv_msg) |
3831 | goto out; | |
3832 | ||
3833 | /* Make sure the user still exists. */ | |
3834 | if (!recv_msg->user || !recv_msg->user->valid) | |
3835 | goto out; | |
3836 | ||
3837 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3838 | recv_msg->msg.data = recv_msg->msg_data; | |
3839 | recv_msg->msg.data_len = 1; | |
3840 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3841 | deliver_response(recv_msg); | |
1da177e4 | 3842 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3843 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3844 | /* It's from the receive queue. */ |
3845 | chan = msg->rsp[3] & 0xf; | |
3846 | if (chan >= IPMI_MAX_CHANNELS) { | |
3847 | /* Invalid channel number */ | |
3848 | requeue = 0; | |
3849 | goto out; | |
3850 | } | |
3851 | ||
4dec302f | 3852 | /* |
9a2845c4 CM |
3853 | * We need to make sure the channels have been initialized. |
3854 | * The channel_handler routine will set the "curr_channel" | |
3855 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
3856 | * channels for this interface have been initialized. | |
3857 | */ | |
4dec302f | 3858 | if (intf->curr_channel < IPMI_MAX_CHANNELS) { |
9a2845c4 | 3859 | requeue = 0; /* Throw the message away */ |
4dec302f | 3860 | goto out; |
3861 | } | |
3862 | ||
1da177e4 LT |
3863 | switch (intf->channels[chan].medium) { |
3864 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3865 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3866 | /* |
3867 | * It's a response, so find the | |
3868 | * requesting message and send it up. | |
3869 | */ | |
1da177e4 LT |
3870 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3871 | } else { | |
c70d7499 CM |
3872 | /* |
3873 | * It's a command to the SMS from some other | |
3874 | * entity. Handle that. | |
3875 | */ | |
1da177e4 LT |
3876 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3877 | } | |
3878 | break; | |
3879 | ||
3880 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3881 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3882 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3883 | /* |
3884 | * It's a response, so find the | |
3885 | * requesting message and send it up. | |
3886 | */ | |
1da177e4 LT |
3887 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3888 | } else { | |
c70d7499 CM |
3889 | /* |
3890 | * It's a command to the SMS from some other | |
3891 | * entity. Handle that. | |
3892 | */ | |
1da177e4 LT |
3893 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3894 | } | |
3895 | break; | |
3896 | ||
3897 | default: | |
4dec302f | 3898 | /* Check for OEM Channels. Clients had better |
3899 | register for these commands. */ | |
3900 | if ((intf->channels[chan].medium | |
3901 | >= IPMI_CHANNEL_MEDIUM_OEM_MIN) | |
3902 | && (intf->channels[chan].medium | |
3903 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { | |
3904 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
3905 | } else { | |
3906 | /* | |
3907 | * We don't handle the channel type, so just | |
3908 | * free the message. | |
3909 | */ | |
3910 | requeue = 0; | |
3911 | } | |
1da177e4 LT |
3912 | } |
3913 | ||
3914 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3915 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 3916 | /* It's an asynchronous event. */ |
1da177e4 LT |
3917 | requeue = handle_read_event_rsp(intf, msg); |
3918 | } else { | |
3919 | /* It's a response from the local BMC. */ | |
3920 | requeue = handle_bmc_rsp(intf, msg); | |
3921 | } | |
3922 | ||
3923 | out: | |
3924 | return requeue; | |
3925 | } | |
3926 | ||
7adf579c CM |
3927 | /* |
3928 | * If there are messages in the queue or pretimeouts, handle them. | |
3929 | */ | |
3930 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
3931 | { | |
3932 | struct ipmi_smi_msg *smi_msg; | |
3933 | unsigned long flags = 0; | |
3934 | int rv; | |
3935 | int run_to_completion = intf->run_to_completion; | |
3936 | ||
3937 | /* See if any waiting messages need to be processed. */ | |
3938 | if (!run_to_completion) | |
65be7544 CM |
3939 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
3940 | while (!list_empty(&intf->waiting_rcv_msgs)) { | |
3941 | smi_msg = list_entry(intf->waiting_rcv_msgs.next, | |
7adf579c | 3942 | struct ipmi_smi_msg, link); |
ae4ea9a2 | 3943 | list_del(&smi_msg->link); |
7adf579c | 3944 | if (!run_to_completion) |
65be7544 CM |
3945 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, |
3946 | flags); | |
7adf579c CM |
3947 | rv = handle_one_recv_msg(intf, smi_msg); |
3948 | if (!run_to_completion) | |
65be7544 | 3949 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
7ea0ed2b | 3950 | if (rv > 0) { |
7adf579c CM |
3951 | /* |
3952 | * To preserve message order, quit if we | |
ae4ea9a2 JN |
3953 | * can't handle a message. Add the message |
3954 | * back at the head, this is safe because this | |
3955 | * tasklet is the only thing that pulls the | |
3956 | * messages. | |
7adf579c | 3957 | */ |
ae4ea9a2 | 3958 | list_add(&smi_msg->link, &intf->waiting_rcv_msgs); |
7adf579c | 3959 | break; |
7ea0ed2b | 3960 | } else { |
7ea0ed2b CM |
3961 | if (rv == 0) |
3962 | /* Message handled */ | |
3963 | ipmi_free_smi_msg(smi_msg); | |
3964 | /* If rv < 0, fatal error, del but don't free. */ | |
7adf579c CM |
3965 | } |
3966 | } | |
3967 | if (!run_to_completion) | |
65be7544 | 3968 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, flags); |
7adf579c CM |
3969 | |
3970 | /* | |
3971 | * If the pretimout count is non-zero, decrement one from it and | |
3972 | * deliver pretimeouts to all the users. | |
3973 | */ | |
3974 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
3975 | ipmi_user_t user; | |
3976 | ||
3977 | rcu_read_lock(); | |
3978 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3979 | if (user->handler->ipmi_watchdog_pretimeout) | |
3980 | user->handler->ipmi_watchdog_pretimeout( | |
3981 | user->handler_data); | |
3982 | } | |
3983 | rcu_read_unlock(); | |
3984 | } | |
3985 | } | |
3986 | ||
3987 | static void smi_recv_tasklet(unsigned long val) | |
3988 | { | |
7ea0ed2b CM |
3989 | unsigned long flags = 0; /* keep us warning-free. */ |
3990 | ipmi_smi_t intf = (ipmi_smi_t) val; | |
3991 | int run_to_completion = intf->run_to_completion; | |
3992 | struct ipmi_smi_msg *newmsg = NULL; | |
3993 | ||
3994 | /* | |
3995 | * Start the next message if available. | |
3996 | * | |
3997 | * Do this here, not in the actual receiver, because we may deadlock | |
3998 | * because the lower layer is allowed to hold locks while calling | |
3999 | * message delivery. | |
4000 | */ | |
cdea4656 TC |
4001 | |
4002 | rcu_read_lock(); | |
4003 | ||
7ea0ed2b CM |
4004 | if (!run_to_completion) |
4005 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
4006 | if (intf->curr_msg == NULL && !intf->in_shutdown) { | |
4007 | struct list_head *entry = NULL; | |
4008 | ||
4009 | /* Pick the high priority queue first. */ | |
4010 | if (!list_empty(&intf->hp_xmit_msgs)) | |
4011 | entry = intf->hp_xmit_msgs.next; | |
4012 | else if (!list_empty(&intf->xmit_msgs)) | |
4013 | entry = intf->xmit_msgs.next; | |
4014 | ||
4015 | if (entry) { | |
4016 | list_del(entry); | |
4017 | newmsg = list_entry(entry, struct ipmi_smi_msg, link); | |
4018 | intf->curr_msg = newmsg; | |
4019 | } | |
4020 | } | |
4021 | if (!run_to_completion) | |
4022 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
4023 | if (newmsg) | |
99ab32f3 | 4024 | intf->handlers->sender(intf->send_info, newmsg); |
7ea0ed2b | 4025 | |
cdea4656 TC |
4026 | rcu_read_unlock(); |
4027 | ||
7ea0ed2b | 4028 | handle_new_recv_msgs(intf); |
7adf579c CM |
4029 | } |
4030 | ||
1da177e4 LT |
4031 | /* Handle a new message from the lower layer. */ |
4032 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
4033 | struct ipmi_smi_msg *msg) | |
4034 | { | |
5956dce1 | 4035 | unsigned long flags = 0; /* keep us warning-free. */ |
7ea0ed2b | 4036 | int run_to_completion = intf->run_to_completion; |
1da177e4 | 4037 | |
1da177e4 LT |
4038 | if ((msg->data_size >= 2) |
4039 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
4040 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 | 4041 | && (msg->user_data == NULL)) { |
7ea0ed2b CM |
4042 | |
4043 | if (intf->in_shutdown) | |
4044 | goto free_msg; | |
4045 | ||
c70d7499 CM |
4046 | /* |
4047 | * This is the local response to a command send, start | |
4048 | * the timer for these. The user_data will not be | |
4049 | * NULL if this is a response send, and we will let | |
4050 | * response sends just go through. | |
4051 | */ | |
4052 | ||
4053 | /* | |
4054 | * Check for errors, if we get certain errors (ones | |
4055 | * that mean basically we can try again later), we | |
4056 | * ignore them and start the timer. Otherwise we | |
4057 | * report the error immediately. | |
4058 | */ | |
1da177e4 LT |
4059 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
4060 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
4061 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
4062 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 4063 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
4064 | int chan = msg->rsp[3] & 0xf; |
4065 | ||
4066 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
4067 | if (chan >= IPMI_MAX_CHANNELS) |
4068 | ; /* This shouldn't happen */ | |
4069 | else if ((intf->channels[chan].medium | |
4070 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
4071 | || (intf->channels[chan].medium | |
4072 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 4073 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 4074 | else |
b2655f26 | 4075 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 4076 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 4077 | } else |
1da177e4 LT |
4078 | /* The message was sent, start the timer. */ |
4079 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 | 4080 | |
7ea0ed2b | 4081 | free_msg: |
1da177e4 | 4082 | ipmi_free_smi_msg(msg); |
7ea0ed2b CM |
4083 | } else { |
4084 | /* | |
4085 | * To preserve message order, we keep a queue and deliver from | |
4086 | * a tasklet. | |
4087 | */ | |
4088 | if (!run_to_completion) | |
4089 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); | |
4090 | list_add_tail(&msg->link, &intf->waiting_rcv_msgs); | |
4091 | if (!run_to_completion) | |
4092 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, | |
4093 | flags); | |
1da177e4 LT |
4094 | } |
4095 | ||
5956dce1 | 4096 | if (!run_to_completion) |
7ea0ed2b | 4097 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); |
b2234ee9 CM |
4098 | /* |
4099 | * We can get an asynchronous event or receive message in addition | |
4100 | * to commands we send. | |
4101 | */ | |
7ea0ed2b CM |
4102 | if (msg == intf->curr_msg) |
4103 | intf->curr_msg = NULL; | |
5956dce1 | 4104 | if (!run_to_completion) |
7ea0ed2b | 4105 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
c70d7499 | 4106 | |
7ea0ed2b CM |
4107 | if (run_to_completion) |
4108 | smi_recv_tasklet((unsigned long) intf); | |
4109 | else | |
4110 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4111 | } |
c70d7499 | 4112 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
4113 | |
4114 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
4115 | { | |
7ea0ed2b CM |
4116 | if (intf->in_shutdown) |
4117 | return; | |
4118 | ||
7adf579c CM |
4119 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
4120 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4121 | } |
c70d7499 | 4122 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 4123 | |
882fe011 CM |
4124 | static struct ipmi_smi_msg * |
4125 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
4126 | unsigned char seq, long seqid) | |
1da177e4 | 4127 | { |
882fe011 | 4128 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 4129 | if (!smi_msg) |
c70d7499 CM |
4130 | /* |
4131 | * If we can't allocate the message, then just return, we | |
4132 | * get 4 retries, so this should be ok. | |
4133 | */ | |
882fe011 | 4134 | return NULL; |
1da177e4 LT |
4135 | |
4136 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
4137 | smi_msg->data_size = recv_msg->msg.data_len; | |
4138 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 4139 | |
1da177e4 LT |
4140 | #ifdef DEBUG_MSGING |
4141 | { | |
4142 | int m; | |
4143 | printk("Resend: "); | |
e8b33617 | 4144 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4145 | printk(" %2.2x", smi_msg->data[m]); |
4146 | printk("\n"); | |
4147 | } | |
4148 | #endif | |
882fe011 | 4149 | return smi_msg; |
1da177e4 LT |
4150 | } |
4151 | ||
393d2cc3 | 4152 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
392a17b1 CM |
4153 | struct list_head *timeouts, |
4154 | unsigned long timeout_period, | |
89986496 CM |
4155 | int slot, unsigned long *flags, |
4156 | unsigned int *waiting_msgs) | |
393d2cc3 | 4157 | { |
b2c03941 | 4158 | struct ipmi_recv_msg *msg; |
81d02b7f | 4159 | const struct ipmi_smi_handlers *handlers; |
b2c03941 | 4160 | |
7ea0ed2b | 4161 | if (intf->in_shutdown) |
b2c03941 | 4162 | return; |
393d2cc3 CM |
4163 | |
4164 | if (!ent->inuse) | |
4165 | return; | |
4166 | ||
392a17b1 CM |
4167 | if (timeout_period < ent->timeout) { |
4168 | ent->timeout -= timeout_period; | |
89986496 | 4169 | (*waiting_msgs)++; |
393d2cc3 | 4170 | return; |
89986496 | 4171 | } |
393d2cc3 CM |
4172 | |
4173 | if (ent->retries_left == 0) { | |
4174 | /* The message has used all its retries. */ | |
4175 | ent->inuse = 0; | |
4176 | msg = ent->recv_msg; | |
4177 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4178 | if (ent->broadcast) |
b2655f26 | 4179 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4180 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4181 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4182 | else |
b2655f26 | 4183 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4184 | } else { |
4185 | struct ipmi_smi_msg *smi_msg; | |
4186 | /* More retries, send again. */ | |
4187 | ||
89986496 CM |
4188 | (*waiting_msgs)++; |
4189 | ||
c70d7499 CM |
4190 | /* |
4191 | * Start with the max timer, set to normal timer after | |
4192 | * the message is sent. | |
4193 | */ | |
393d2cc3 CM |
4194 | ent->timeout = MAX_MSG_TIMEOUT; |
4195 | ent->retries_left--; | |
393d2cc3 CM |
4196 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4197 | ent->seqid); | |
25176ed6 CM |
4198 | if (!smi_msg) { |
4199 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4200 | ipmi_inc_stat(intf, | |
4201 | dropped_rexmit_lan_commands); | |
4202 | else | |
4203 | ipmi_inc_stat(intf, | |
4204 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4205 | return; |
25176ed6 | 4206 | } |
393d2cc3 CM |
4207 | |
4208 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4209 | |
c70d7499 CM |
4210 | /* |
4211 | * Send the new message. We send with a zero | |
4212 | * priority. It timed out, I doubt time is that | |
4213 | * critical now, and high priority messages are really | |
4214 | * only for messages to the local MC, which don't get | |
4215 | * resent. | |
4216 | */ | |
b2c03941 | 4217 | handlers = intf->handlers; |
25176ed6 CM |
4218 | if (handlers) { |
4219 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4220 | ipmi_inc_stat(intf, | |
4221 | retransmitted_lan_commands); | |
4222 | else | |
4223 | ipmi_inc_stat(intf, | |
4224 | retransmitted_ipmb_commands); | |
4225 | ||
81d02b7f | 4226 | smi_send(intf, handlers, smi_msg, 0); |
25176ed6 | 4227 | } else |
b2c03941 CM |
4228 | ipmi_free_smi_msg(smi_msg); |
4229 | ||
393d2cc3 CM |
4230 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4231 | } | |
4232 | } | |
4233 | ||
392a17b1 CM |
4234 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, |
4235 | unsigned long timeout_period) | |
1da177e4 | 4236 | { |
1da177e4 LT |
4237 | struct list_head timeouts; |
4238 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4239 | unsigned long flags; |
bca0324d | 4240 | int i; |
89986496 | 4241 | unsigned int waiting_msgs = 0; |
1da177e4 | 4242 | |
89986496 CM |
4243 | /* |
4244 | * Go through the seq table and find any messages that | |
4245 | * have timed out, putting them in the timeouts | |
4246 | * list. | |
4247 | */ | |
4248 | INIT_LIST_HEAD(&timeouts); | |
4249 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4250 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4251 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4252 | &timeouts, timeout_period, i, | |
4253 | &flags, &waiting_msgs); | |
4254 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4255 | |
89986496 CM |
4256 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4257 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4258 | |
89986496 CM |
4259 | /* |
4260 | * Maintenance mode handling. Check the timeout | |
4261 | * optimistically before we claim the lock. It may | |
4262 | * mean a timeout gets missed occasionally, but that | |
4263 | * only means the timeout gets extended by one period | |
4264 | * in that case. No big deal, and it avoids the lock | |
4265 | * most of the time. | |
4266 | */ | |
4267 | if (intf->auto_maintenance_timeout > 0) { | |
4268 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4269 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4270 | intf->auto_maintenance_timeout |
4271 | -= timeout_period; | |
4272 | if (!intf->maintenance_mode | |
4273 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4274 | intf->maintenance_mode_enable = false; |
89986496 | 4275 | maintenance_mode_update(intf); |
b9675136 | 4276 | } |
b9675136 | 4277 | } |
89986496 CM |
4278 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4279 | flags); | |
1da177e4 | 4280 | } |
89986496 CM |
4281 | |
4282 | tasklet_schedule(&intf->recv_tasklet); | |
4283 | ||
4284 | return waiting_msgs; | |
1da177e4 LT |
4285 | } |
4286 | ||
89986496 | 4287 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4288 | { |
89986496 CM |
4289 | /* No event requests when in maintenance mode. */ |
4290 | if (intf->maintenance_mode_enable) | |
4291 | return; | |
b9675136 | 4292 | |
7ea0ed2b CM |
4293 | if (!intf->in_shutdown) |
4294 | intf->handlers->request_events(intf->send_info); | |
1da177e4 LT |
4295 | } |
4296 | ||
4297 | static struct timer_list ipmi_timer; | |
4298 | ||
8f43f84f | 4299 | static atomic_t stop_operation; |
1da177e4 LT |
4300 | |
4301 | static void ipmi_timeout(unsigned long data) | |
4302 | { | |
89986496 CM |
4303 | ipmi_smi_t intf; |
4304 | int nt = 0; | |
4305 | ||
8f43f84f | 4306 | if (atomic_read(&stop_operation)) |
1da177e4 | 4307 | return; |
1da177e4 | 4308 | |
89986496 CM |
4309 | rcu_read_lock(); |
4310 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4311 | int lnt = 0; | |
4312 | ||
4313 | if (atomic_read(&intf->event_waiters)) { | |
4314 | intf->ticks_to_req_ev--; | |
4315 | if (intf->ticks_to_req_ev == 0) { | |
4316 | ipmi_request_event(intf); | |
4317 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4318 | } | |
4319 | lnt++; | |
4320 | } | |
4321 | ||
4322 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4323 | |
89986496 CM |
4324 | lnt = !!lnt; |
4325 | if (lnt != intf->last_needs_timer && | |
4326 | intf->handlers->set_need_watch) | |
4327 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4328 | intf->last_needs_timer = lnt; | |
1da177e4 | 4329 | |
89986496 CM |
4330 | nt += lnt; |
4331 | } | |
4332 | rcu_read_unlock(); | |
4333 | ||
4334 | if (nt) | |
4335 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4336 | } |
4337 | ||
89986496 CM |
4338 | static void need_waiter(ipmi_smi_t intf) |
4339 | { | |
4340 | /* Racy, but worst case we start the timer twice. */ | |
4341 | if (!timer_pending(&ipmi_timer)) | |
4342 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4343 | } | |
1da177e4 LT |
4344 | |
4345 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4346 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4347 | ||
1da177e4 LT |
4348 | static void free_smi_msg(struct ipmi_smi_msg *msg) |
4349 | { | |
4350 | atomic_dec(&smi_msg_inuse_count); | |
4351 | kfree(msg); | |
4352 | } | |
4353 | ||
4354 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4355 | { | |
4356 | struct ipmi_smi_msg *rv; | |
4357 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4358 | if (rv) { | |
4359 | rv->done = free_smi_msg; | |
4360 | rv->user_data = NULL; | |
4361 | atomic_inc(&smi_msg_inuse_count); | |
4362 | } | |
4363 | return rv; | |
4364 | } | |
c70d7499 | 4365 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4366 | |
4367 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4368 | { | |
4369 | atomic_dec(&recv_msg_inuse_count); | |
4370 | kfree(msg); | |
4371 | } | |
4372 | ||
74006309 | 4373 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4374 | { |
4375 | struct ipmi_recv_msg *rv; | |
4376 | ||
4377 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4378 | if (rv) { | |
a9eec556 | 4379 | rv->user = NULL; |
1da177e4 LT |
4380 | rv->done = free_recv_msg; |
4381 | atomic_inc(&recv_msg_inuse_count); | |
4382 | } | |
4383 | return rv; | |
4384 | } | |
4385 | ||
393d2cc3 CM |
4386 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4387 | { | |
4388 | if (msg->user) | |
4389 | kref_put(&msg->user->refcount, free_user); | |
4390 | msg->done(msg); | |
4391 | } | |
c70d7499 | 4392 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4393 | |
895dcfd1 CM |
4394 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4395 | ||
1da177e4 LT |
4396 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4397 | { | |
895dcfd1 | 4398 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4399 | } |
4400 | ||
4401 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4402 | { | |
895dcfd1 CM |
4403 | atomic_dec(&panic_done_count); |
4404 | } | |
4405 | ||
4406 | /* | |
4407 | * Inside a panic, send a message and wait for a response. | |
4408 | */ | |
4409 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4410 | struct ipmi_addr *addr, | |
4411 | struct kernel_ipmi_msg *msg) | |
4412 | { | |
4413 | struct ipmi_smi_msg smi_msg; | |
4414 | struct ipmi_recv_msg recv_msg; | |
4415 | int rv; | |
4416 | ||
4417 | smi_msg.done = dummy_smi_done_handler; | |
4418 | recv_msg.done = dummy_recv_done_handler; | |
4419 | atomic_add(2, &panic_done_count); | |
4420 | rv = i_ipmi_request(NULL, | |
4421 | intf, | |
4422 | addr, | |
4423 | 0, | |
4424 | msg, | |
4425 | intf, | |
4426 | &smi_msg, | |
4427 | &recv_msg, | |
4428 | 0, | |
4429 | intf->channels[0].address, | |
4430 | intf->channels[0].lun, | |
4431 | 0, 1); /* Don't retry, and don't wait. */ | |
4432 | if (rv) | |
4433 | atomic_sub(2, &panic_done_count); | |
82802f96 HK |
4434 | else if (intf->handlers->flush_messages) |
4435 | intf->handlers->flush_messages(intf->send_info); | |
4436 | ||
895dcfd1 CM |
4437 | while (atomic_read(&panic_done_count) != 0) |
4438 | ipmi_poll(intf); | |
1da177e4 LT |
4439 | } |
4440 | ||
56a55ec6 | 4441 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4442 | { |
56a55ec6 CM |
4443 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4444 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4445 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4446 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4447 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4448 | intf->event_receiver = msg->msg.data[1]; |
4449 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4450 | } |
4451 | } | |
4452 | ||
56a55ec6 | 4453 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4454 | { |
56a55ec6 CM |
4455 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4456 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4457 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4458 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4459 | /* | |
4460 | * A get device id command, save if we are an event | |
4461 | * receiver or generator. | |
4462 | */ | |
56a55ec6 CM |
4463 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4464 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4465 | } |
4466 | } | |
1da177e4 LT |
4467 | |
4468 | static void send_panic_events(char *str) | |
4469 | { | |
4470 | struct kernel_ipmi_msg msg; | |
4471 | ipmi_smi_t intf; | |
4472 | unsigned char data[16]; | |
1da177e4 LT |
4473 | struct ipmi_system_interface_addr *si; |
4474 | struct ipmi_addr addr; | |
1da177e4 | 4475 | |
1c9f98d1 CM |
4476 | if (ipmi_send_panic_event == IPMI_SEND_PANIC_EVENT_NONE) |
4477 | return; | |
4478 | ||
1da177e4 LT |
4479 | si = (struct ipmi_system_interface_addr *) &addr; |
4480 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4481 | si->channel = IPMI_BMC_CHANNEL; | |
4482 | si->lun = 0; | |
4483 | ||
4484 | /* Fill in an event telling that we have failed. */ | |
4485 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4486 | msg.cmd = 2; /* Platform event command. */ | |
4487 | msg.data = data; | |
4488 | msg.data_len = 8; | |
cda315ab | 4489 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4490 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4491 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4492 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4493 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4494 | ||
c70d7499 CM |
4495 | /* |
4496 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4497 | * to make the panic events more useful. | |
4498 | */ | |
1da177e4 LT |
4499 | if (str) { |
4500 | data[3] = str[0]; | |
4501 | data[6] = str[1]; | |
4502 | data[7] = str[2]; | |
4503 | } | |
4504 | ||
1da177e4 | 4505 | /* For every registered interface, send the event. */ |
bca0324d | 4506 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1c9f98d1 CM |
4507 | if (!intf->handlers || !intf->handlers->poll) |
4508 | /* Interface is not ready or can't run at panic time. */ | |
1da177e4 LT |
4509 | continue; |
4510 | ||
4511 | /* Send the event announcing the panic. */ | |
895dcfd1 | 4512 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4513 | } |
4514 | ||
c70d7499 CM |
4515 | /* |
4516 | * On every interface, dump a bunch of OEM event holding the | |
4517 | * string. | |
4518 | */ | |
1c9f98d1 | 4519 | if (ipmi_send_panic_event != IPMI_SEND_PANIC_EVENT_STRING || !str) |
1da177e4 LT |
4520 | return; |
4521 | ||
bca0324d CM |
4522 | /* For every registered interface, send the event. */ |
4523 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4524 | char *p = str; |
4525 | struct ipmi_ipmb_addr *ipmb; | |
4526 | int j; | |
4527 | ||
bca0324d CM |
4528 | if (intf->intf_num == -1) |
4529 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4530 | continue; |
4531 | ||
78ba2faf CM |
4532 | /* |
4533 | * intf_num is used as an marker to tell if the | |
4534 | * interface is valid. Thus we need a read barrier to | |
4535 | * make sure data fetched before checking intf_num | |
4536 | * won't be used. | |
4537 | */ | |
4538 | smp_rmb(); | |
4539 | ||
c70d7499 CM |
4540 | /* |
4541 | * First job here is to figure out where to send the | |
4542 | * OEM events. There's no way in IPMI to send OEM | |
4543 | * events using an event send command, so we have to | |
4544 | * find the SEL to put them in and stick them in | |
4545 | * there. | |
4546 | */ | |
1da177e4 LT |
4547 | |
4548 | /* Get capabilities from the get device id. */ | |
4549 | intf->local_sel_device = 0; | |
4550 | intf->local_event_generator = 0; | |
4551 | intf->event_receiver = 0; | |
4552 | ||
4553 | /* Request the device info from the local MC. */ | |
4554 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4555 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4556 | msg.data = NULL; | |
4557 | msg.data_len = 0; | |
4558 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 4559 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4560 | |
4561 | if (intf->local_event_generator) { | |
4562 | /* Request the event receiver from the local MC. */ | |
4563 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4564 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4565 | msg.data = NULL; | |
4566 | msg.data_len = 0; | |
4567 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 4568 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4569 | } |
4570 | intf->null_user_handler = NULL; | |
4571 | ||
c70d7499 CM |
4572 | /* |
4573 | * Validate the event receiver. The low bit must not | |
4574 | * be 1 (it must be a valid IPMB address), it cannot | |
4575 | * be zero, and it must not be my address. | |
4576 | */ | |
4577 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4578 | && (intf->event_receiver != 0) |
c70d7499 CM |
4579 | && (intf->event_receiver != intf->channels[0].address)) { |
4580 | /* | |
4581 | * The event receiver is valid, send an IPMB | |
4582 | * message. | |
4583 | */ | |
1da177e4 LT |
4584 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4585 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4586 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4587 | ipmb->lun = intf->event_receiver_lun; | |
4588 | ipmb->slave_addr = intf->event_receiver; | |
4589 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4590 | /* |
4591 | * The event receiver was not valid (or was | |
4592 | * me), but I am an SEL device, just dump it | |
4593 | * in my SEL. | |
4594 | */ | |
1da177e4 LT |
4595 | si = (struct ipmi_system_interface_addr *) &addr; |
4596 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4597 | si->channel = IPMI_BMC_CHANNEL; | |
4598 | si->lun = 0; | |
4599 | } else | |
4600 | continue; /* No where to send the event. */ | |
4601 | ||
1da177e4 LT |
4602 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4603 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4604 | msg.data = data; | |
4605 | msg.data_len = 16; | |
4606 | ||
4607 | j = 0; | |
4608 | while (*p) { | |
4609 | int size = strlen(p); | |
4610 | ||
4611 | if (size > 11) | |
4612 | size = 11; | |
4613 | data[0] = 0; | |
4614 | data[1] = 0; | |
4615 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4616 | data[3] = intf->channels[0].address; |
1da177e4 | 4617 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4618 | /* |
4619 | * Always give 11 bytes, so strncpy will fill | |
4620 | * it with zeroes for me. | |
4621 | */ | |
1da177e4 LT |
4622 | strncpy(data+5, p, 11); |
4623 | p += size; | |
4624 | ||
895dcfd1 | 4625 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 4626 | } |
c70d7499 | 4627 | } |
1da177e4 | 4628 | } |
1da177e4 | 4629 | |
0c8204b3 | 4630 | static int has_panicked; |
1da177e4 LT |
4631 | |
4632 | static int panic_event(struct notifier_block *this, | |
4633 | unsigned long event, | |
c70d7499 | 4634 | void *ptr) |
1da177e4 | 4635 | { |
1da177e4 LT |
4636 | ipmi_smi_t intf; |
4637 | ||
f18190bd | 4638 | if (has_panicked) |
1da177e4 | 4639 | return NOTIFY_DONE; |
f18190bd | 4640 | has_panicked = 1; |
1da177e4 LT |
4641 | |
4642 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4643 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4644 | if (!intf->handlers) |
4645 | /* Interface is not ready. */ | |
1da177e4 LT |
4646 | continue; |
4647 | ||
06e5e345 HK |
4648 | /* |
4649 | * If we were interrupted while locking xmit_msgs_lock or | |
4650 | * waiting_rcv_msgs_lock, the corresponding list may be | |
4651 | * corrupted. In this case, drop items on the list for | |
4652 | * the safety. | |
4653 | */ | |
4654 | if (!spin_trylock(&intf->xmit_msgs_lock)) { | |
4655 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
4656 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
4657 | } else | |
4658 | spin_unlock(&intf->xmit_msgs_lock); | |
4659 | ||
4660 | if (!spin_trylock(&intf->waiting_rcv_msgs_lock)) | |
4661 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
4662 | else | |
4663 | spin_unlock(&intf->waiting_rcv_msgs_lock); | |
4664 | ||
5956dce1 | 4665 | intf->run_to_completion = 1; |
1c9f98d1 CM |
4666 | if (intf->handlers->set_run_to_completion) |
4667 | intf->handlers->set_run_to_completion(intf->send_info, | |
4668 | 1); | |
1da177e4 LT |
4669 | } |
4670 | ||
1da177e4 | 4671 | send_panic_events(ptr); |
1da177e4 LT |
4672 | |
4673 | return NOTIFY_DONE; | |
4674 | } | |
4675 | ||
4676 | static struct notifier_block panic_block = { | |
4677 | .notifier_call = panic_event, | |
4678 | .next = NULL, | |
4679 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4680 | }; | |
4681 | ||
4682 | static int ipmi_init_msghandler(void) | |
4683 | { | |
50c812b2 | 4684 | int rv; |
1da177e4 LT |
4685 | |
4686 | if (initialized) | |
4687 | return 0; | |
4688 | ||
fe2d5ffc | 4689 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4690 | if (rv) { |
4691 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4692 | return rv; | |
4693 | } | |
4694 | ||
1da177e4 | 4695 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4696 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4697 | |
3b625943 | 4698 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4699 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4700 | if (!proc_ipmi_root) { | |
4701 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
80fad5b9 | 4702 | driver_unregister(&ipmidriver.driver); |
1da177e4 LT |
4703 | return -ENOMEM; |
4704 | } | |
4705 | ||
3b625943 | 4706 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4707 | |
409035e0 CM |
4708 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4709 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4710 | |
e041c683 | 4711 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4712 | |
4713 | initialized = 1; | |
4714 | ||
4715 | return 0; | |
4716 | } | |
4717 | ||
60ee6d5f | 4718 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
4719 | { |
4720 | ipmi_init_msghandler(); | |
4721 | return 0; | |
4722 | } | |
4723 | ||
60ee6d5f | 4724 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
4725 | { |
4726 | int count; | |
4727 | ||
4728 | if (!initialized) | |
4729 | return; | |
4730 | ||
e041c683 | 4731 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4732 | |
c70d7499 CM |
4733 | /* |
4734 | * This can't be called if any interfaces exist, so no worry | |
4735 | * about shutting down the interfaces. | |
4736 | */ | |
1da177e4 | 4737 | |
c70d7499 CM |
4738 | /* |
4739 | * Tell the timer to stop, then wait for it to stop. This | |
4740 | * avoids problems with race conditions removing the timer | |
4741 | * here. | |
4742 | */ | |
8f43f84f CM |
4743 | atomic_inc(&stop_operation); |
4744 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4745 | |
3b625943 | 4746 | #ifdef CONFIG_PROC_FS |
a8ca16ea | 4747 | proc_remove(proc_ipmi_root); |
3b625943 | 4748 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4749 | |
fe2d5ffc | 4750 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4751 | |
1da177e4 LT |
4752 | initialized = 0; |
4753 | ||
4754 | /* Check for buffer leaks. */ | |
4755 | count = atomic_read(&smi_msg_inuse_count); | |
4756 | if (count != 0) | |
4757 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4758 | count); | |
4759 | count = atomic_read(&recv_msg_inuse_count); | |
4760 | if (count != 0) | |
4761 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4762 | count); | |
4763 | } | |
4764 | module_exit(cleanup_ipmi); | |
4765 | ||
4766 | module_init(ipmi_init_msghandler_mod); | |
4767 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4768 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4769 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4770 | " interface."); | |
1fdd75bd | 4771 | MODULE_VERSION(IPMI_DRIVER_VERSION); |
070cbd1d | 4772 | MODULE_SOFTDEP("post: ipmi_devintf"); |