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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> |
c0734bd5 | 50 | #include <linux/workqueue.h> |
3fd32f9e | 51 | #include <linux/uuid.h> |
1da177e4 LT |
52 | |
53 | #define PFX "IPMI message handler: " | |
1fdd75bd | 54 | |
f7caa1b5 | 55 | #define IPMI_DRIVER_VERSION "39.2" |
1da177e4 LT |
56 | |
57 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
58 | static int ipmi_init_msghandler(void); | |
7adf579c CM |
59 | static void smi_recv_tasklet(unsigned long); |
60 | static void handle_new_recv_msgs(ipmi_smi_t intf); | |
89986496 | 61 | static void need_waiter(ipmi_smi_t intf); |
7ea0ed2b CM |
62 | static int handle_one_recv_msg(ipmi_smi_t intf, |
63 | struct ipmi_smi_msg *msg); | |
1da177e4 | 64 | |
0c8204b3 | 65 | static int initialized; |
1da177e4 | 66 | |
1c9f98d1 CM |
67 | enum ipmi_panic_event_op { |
68 | IPMI_SEND_PANIC_EVENT_NONE, | |
69 | IPMI_SEND_PANIC_EVENT, | |
70 | IPMI_SEND_PANIC_EVENT_STRING | |
71 | }; | |
72 | #ifdef CONFIG_IPMI_PANIC_STRING | |
73 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT_STRING | |
74 | #elif defined(CONFIG_IPMI_PANIC_EVENT) | |
75 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT | |
76 | #else | |
77 | #define IPMI_PANIC_DEFAULT IPMI_SEND_PANIC_EVENT_NONE | |
78 | #endif | |
79 | static enum ipmi_panic_event_op ipmi_send_panic_event = IPMI_PANIC_DEFAULT; | |
80 | ||
81 | static int panic_op_write_handler(const char *val, | |
82 | const struct kernel_param *kp) | |
83 | { | |
84 | char valcp[16]; | |
85 | char *s; | |
86 | ||
87 | strncpy(valcp, val, 16); | |
88 | valcp[15] = '\0'; | |
89 | ||
90 | s = strstrip(valcp); | |
91 | ||
92 | if (strcmp(s, "none") == 0) | |
93 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT_NONE; | |
94 | else if (strcmp(s, "event") == 0) | |
95 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT; | |
96 | else if (strcmp(s, "string") == 0) | |
97 | ipmi_send_panic_event = IPMI_SEND_PANIC_EVENT_STRING; | |
98 | else | |
99 | return -EINVAL; | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | static int panic_op_read_handler(char *buffer, const struct kernel_param *kp) | |
105 | { | |
106 | switch (ipmi_send_panic_event) { | |
107 | case IPMI_SEND_PANIC_EVENT_NONE: | |
108 | strcpy(buffer, "none"); | |
109 | break; | |
110 | ||
111 | case IPMI_SEND_PANIC_EVENT: | |
112 | strcpy(buffer, "event"); | |
113 | break; | |
114 | ||
115 | case IPMI_SEND_PANIC_EVENT_STRING: | |
116 | strcpy(buffer, "string"); | |
117 | break; | |
118 | ||
119 | default: | |
120 | strcpy(buffer, "???"); | |
121 | break; | |
122 | } | |
123 | ||
124 | return strlen(buffer); | |
125 | } | |
126 | ||
127 | static const struct kernel_param_ops panic_op_ops = { | |
128 | .set = panic_op_write_handler, | |
129 | .get = panic_op_read_handler | |
130 | }; | |
131 | module_param_cb(panic_op, &panic_op_ops, NULL, 0600); | |
132 | 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."); | |
133 | ||
134 | ||
55f91cb6 | 135 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
0c8204b3 | 136 | static struct proc_dir_entry *proc_ipmi_root; |
55f91cb6 | 137 | #endif /* CONFIG_IPMI_PROC_INTERFACE */ |
1da177e4 | 138 | |
b9675136 CM |
139 | /* Remain in auto-maintenance mode for this amount of time (in ms). */ |
140 | #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000 | |
141 | ||
1da177e4 LT |
142 | #define MAX_EVENTS_IN_QUEUE 25 |
143 | ||
c70d7499 CM |
144 | /* |
145 | * Don't let a message sit in a queue forever, always time it with at lest | |
146 | * the max message timer. This is in milliseconds. | |
147 | */ | |
1da177e4 LT |
148 | #define MAX_MSG_TIMEOUT 60000 |
149 | ||
89986496 CM |
150 | /* Call every ~1000 ms. */ |
151 | #define IPMI_TIMEOUT_TIME 1000 | |
152 | ||
153 | /* How many jiffies does it take to get to the timeout time. */ | |
154 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
155 | ||
156 | /* | |
157 | * Request events from the queue every second (this is the number of | |
158 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
159 | * future, IPMI will add a way to know immediately if an event is in | |
160 | * the queue and this silliness can go away. | |
161 | */ | |
162 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
163 | ||
aa9c9ab2 JK |
164 | /* How long should we cache dynamic device IDs? */ |
165 | #define IPMI_DYN_DEV_ID_EXPIRY (10 * HZ) | |
166 | ||
393d2cc3 CM |
167 | /* |
168 | * The main "user" data structure. | |
169 | */ | |
c70d7499 | 170 | struct ipmi_user { |
1da177e4 LT |
171 | struct list_head link; |
172 | ||
7aefac26 CM |
173 | /* Set to false when the user is destroyed. */ |
174 | bool valid; | |
393d2cc3 CM |
175 | |
176 | struct kref refcount; | |
177 | ||
1da177e4 | 178 | /* The upper layer that handles receive messages. */ |
210af2a5 | 179 | const struct ipmi_user_hndl *handler; |
1da177e4 LT |
180 | void *handler_data; |
181 | ||
182 | /* The interface this user is bound to. */ | |
183 | ipmi_smi_t intf; | |
184 | ||
185 | /* Does this interface receive IPMI events? */ | |
89986496 | 186 | bool gets_events; |
1da177e4 LT |
187 | }; |
188 | ||
c70d7499 | 189 | struct cmd_rcvr { |
1da177e4 LT |
190 | struct list_head link; |
191 | ||
192 | ipmi_user_t user; | |
193 | unsigned char netfn; | |
194 | unsigned char cmd; | |
c69c3127 | 195 | unsigned int chans; |
393d2cc3 CM |
196 | |
197 | /* | |
198 | * This is used to form a linked lised during mass deletion. | |
199 | * Since this is in an RCU list, we cannot use the link above | |
200 | * or change any data until the RCU period completes. So we | |
201 | * use this next variable during mass deletion so we can have | |
202 | * a list and don't have to wait and restart the search on | |
c70d7499 CM |
203 | * every individual deletion of a command. |
204 | */ | |
393d2cc3 | 205 | struct cmd_rcvr *next; |
1da177e4 LT |
206 | }; |
207 | ||
c70d7499 | 208 | struct seq_table { |
1da177e4 LT |
209 | unsigned int inuse : 1; |
210 | unsigned int broadcast : 1; | |
211 | ||
212 | unsigned long timeout; | |
213 | unsigned long orig_timeout; | |
214 | unsigned int retries_left; | |
215 | ||
c70d7499 CM |
216 | /* |
217 | * To verify on an incoming send message response that this is | |
218 | * the message that the response is for, we keep a sequence id | |
219 | * and increment it every time we send a message. | |
220 | */ | |
1da177e4 LT |
221 | long seqid; |
222 | ||
c70d7499 CM |
223 | /* |
224 | * This is held so we can properly respond to the message on a | |
225 | * timeout, and it is used to hold the temporary data for | |
226 | * retransmission, too. | |
227 | */ | |
1da177e4 LT |
228 | struct ipmi_recv_msg *recv_msg; |
229 | }; | |
230 | ||
c70d7499 CM |
231 | /* |
232 | * Store the information in a msgid (long) to allow us to find a | |
233 | * sequence table entry from the msgid. | |
234 | */ | |
a24b5dd5 CM |
235 | #define STORE_SEQ_IN_MSGID(seq, seqid) \ |
236 | ((((seq) & 0x3f) << 26) | ((seqid) & 0x3ffffff)) | |
1da177e4 LT |
237 | |
238 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
239 | do { \ | |
a24b5dd5 CM |
240 | seq = (((msgid) >> 26) & 0x3f); \ |
241 | seqid = ((msgid) & 0x3ffffff); \ | |
c70d7499 | 242 | } while (0) |
1da177e4 | 243 | |
a24b5dd5 | 244 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3ffffff) |
1da177e4 | 245 | |
31b0b073 | 246 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 247 | struct ipmi_channel { |
1da177e4 LT |
248 | unsigned char medium; |
249 | unsigned char protocol; | |
5fdb1fb2 | 250 | }; |
c14979b9 | 251 | |
31b0b073 CM |
252 | struct ipmi_channel_set { |
253 | struct ipmi_channel c[IPMI_MAX_CHANNELS]; | |
254 | }; | |
255 | ||
5fdb1fb2 | 256 | struct ipmi_my_addrinfo { |
c70d7499 CM |
257 | /* |
258 | * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
259 | * but may be changed by the user. | |
260 | */ | |
c14979b9 CM |
261 | unsigned char address; |
262 | ||
c70d7499 CM |
263 | /* |
264 | * My LUN. This should generally stay the SMS LUN, but just in | |
265 | * case... | |
266 | */ | |
c14979b9 | 267 | unsigned char lun; |
1da177e4 LT |
268 | }; |
269 | ||
55f91cb6 | 270 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
c70d7499 | 271 | struct ipmi_proc_entry { |
1da177e4 LT |
272 | char *name; |
273 | struct ipmi_proc_entry *next; | |
274 | }; | |
3b625943 | 275 | #endif |
1da177e4 | 276 | |
b2cfd8ab CM |
277 | /* |
278 | * Note that the product id, manufacturer id, guid, and device id are | |
279 | * immutable in this structure, so dyn_mutex is not required for | |
280 | * accessing those. If those change on a BMC, a new BMC is allocated. | |
281 | */ | |
c70d7499 | 282 | struct bmc_device { |
16639eb0 | 283 | struct platform_device pdev; |
b2cfd8ab | 284 | struct list_head intfs; /* Interfaces on this BMC. */ |
aa9c9ab2 JK |
285 | struct ipmi_device_id id; |
286 | struct ipmi_device_id fetch_id; | |
287 | int dyn_id_set; | |
288 | unsigned long dyn_id_expiry; | |
b2cfd8ab | 289 | struct mutex dyn_mutex; /* Protects id, intfs, & dyn* */ |
3fd32f9e CM |
290 | guid_t guid; |
291 | guid_t fetch_guid; | |
28f26ac7 | 292 | int dyn_guid_set; |
16639eb0 | 293 | struct kref usecount; |
b2cfd8ab | 294 | struct work_struct remove_work; |
50c812b2 | 295 | }; |
16639eb0 | 296 | #define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev) |
50c812b2 | 297 | |
511d57dc | 298 | static int bmc_get_device_id(ipmi_smi_t intf, struct bmc_device *bmc, |
39d3fb45 | 299 | struct ipmi_device_id *id, |
3fd32f9e | 300 | bool *guid_set, guid_t *guid); |
511d57dc | 301 | |
b2655f26 KB |
302 | /* |
303 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
304 | * structure. | |
305 | */ | |
73f2bdb9 CM |
306 | enum ipmi_stat_indexes { |
307 | /* Commands we got from the user that were invalid. */ | |
308 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 309 | |
73f2bdb9 CM |
310 | /* Commands we sent to the MC. */ |
311 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 312 | |
73f2bdb9 CM |
313 | /* Responses from the MC that were delivered to a user. */ |
314 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 315 | |
73f2bdb9 CM |
316 | /* Responses from the MC that were not delivered to a user. */ |
317 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 318 | |
73f2bdb9 CM |
319 | /* Commands we sent out to the IPMB bus. */ |
320 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 321 | |
73f2bdb9 CM |
322 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
323 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 324 | |
73f2bdb9 CM |
325 | /* Each retransmit increments this count. */ |
326 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 327 | |
73f2bdb9 CM |
328 | /* |
329 | * When a message times out (runs out of retransmits) this is | |
330 | * incremented. | |
331 | */ | |
332 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 333 | |
73f2bdb9 CM |
334 | /* |
335 | * This is like above, but for broadcasts. Broadcasts are | |
336 | * *not* included in the above count (they are expected to | |
337 | * time out). | |
338 | */ | |
339 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 340 | |
73f2bdb9 CM |
341 | /* Responses I have sent to the IPMB bus. */ |
342 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 343 | |
73f2bdb9 CM |
344 | /* The response was delivered to the user. */ |
345 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 346 | |
73f2bdb9 CM |
347 | /* The response had invalid data in it. */ |
348 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 349 | |
73f2bdb9 CM |
350 | /* The response didn't have anyone waiting for it. */ |
351 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 352 | |
73f2bdb9 CM |
353 | /* Commands we sent out to the IPMB bus. */ |
354 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 355 | |
73f2bdb9 CM |
356 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
357 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 358 | |
73f2bdb9 CM |
359 | /* Each retransmit increments this count. */ |
360 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 361 | |
73f2bdb9 CM |
362 | /* |
363 | * When a message times out (runs out of retransmits) this is | |
364 | * incremented. | |
365 | */ | |
366 | IPMI_STAT_timed_out_lan_commands, | |
367 | ||
368 | /* Responses I have sent to the IPMB bus. */ | |
369 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 370 | |
73f2bdb9 CM |
371 | /* The response was delivered to the user. */ |
372 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 373 | |
73f2bdb9 CM |
374 | /* The response had invalid data in it. */ |
375 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 376 | |
73f2bdb9 CM |
377 | /* The response didn't have anyone waiting for it. */ |
378 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 379 | |
73f2bdb9 CM |
380 | /* The command was delivered to the user. */ |
381 | IPMI_STAT_handled_commands, | |
b2655f26 | 382 | |
73f2bdb9 CM |
383 | /* The command had invalid data in it. */ |
384 | IPMI_STAT_invalid_commands, | |
b2655f26 | 385 | |
73f2bdb9 CM |
386 | /* The command didn't have anyone waiting for it. */ |
387 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 388 | |
73f2bdb9 CM |
389 | /* Invalid data in an event. */ |
390 | IPMI_STAT_invalid_events, | |
b2655f26 | 391 | |
73f2bdb9 CM |
392 | /* Events that were received with the proper format. */ |
393 | IPMI_STAT_events, | |
b2655f26 | 394 | |
25176ed6 CM |
395 | /* Retransmissions on IPMB that failed. */ |
396 | IPMI_STAT_dropped_rexmit_ipmb_commands, | |
397 | ||
398 | /* Retransmissions on LAN that failed. */ | |
399 | IPMI_STAT_dropped_rexmit_lan_commands, | |
b2655f26 | 400 | |
73f2bdb9 CM |
401 | /* This *must* remain last, add new values above this. */ |
402 | IPMI_NUM_STATS | |
403 | }; | |
b2655f26 KB |
404 | |
405 | ||
1da177e4 | 406 | #define IPMI_IPMB_NUM_SEQ 64 |
c70d7499 | 407 | struct ipmi_smi { |
1da177e4 LT |
408 | /* What interface number are we? */ |
409 | int intf_num; | |
410 | ||
393d2cc3 CM |
411 | struct kref refcount; |
412 | ||
7ea0ed2b CM |
413 | /* Set when the interface is being unregistered. */ |
414 | bool in_shutdown; | |
415 | ||
bca0324d CM |
416 | /* Used for a list of interfaces. */ |
417 | struct list_head link; | |
418 | ||
c70d7499 CM |
419 | /* |
420 | * The list of upper layers that are using me. seq_lock | |
421 | * protects this. | |
422 | */ | |
393d2cc3 | 423 | struct list_head users; |
1da177e4 LT |
424 | |
425 | /* Used for wake ups at startup. */ | |
426 | wait_queue_head_t waitq; | |
427 | ||
aa9c9ab2 JK |
428 | /* |
429 | * Prevents the interface from being unregistered when the | |
430 | * interface is used by being looked up through the BMC | |
431 | * structure. | |
432 | */ | |
433 | struct mutex bmc_reg_mutex; | |
434 | ||
c659ff34 | 435 | struct bmc_device tmp_bmc; |
50c812b2 | 436 | struct bmc_device *bmc; |
a2cb600f | 437 | bool bmc_registered; |
a9137c3d | 438 | struct list_head bmc_link; |
50c812b2 | 439 | char *my_dev_name; |
b2cfd8ab | 440 | bool in_bmc_register; /* Handle recursive situations. Yuck. */ |
c0734bd5 | 441 | struct work_struct bmc_reg_work; |
1da177e4 | 442 | |
c70d7499 CM |
443 | /* |
444 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
445 | * must either be holding the ipmi_interfaces_mutex or be in |
446 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
447 | * value into a local variable and make sure it is not NULL. |
448 | */ | |
81d02b7f | 449 | const struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
450 | void *send_info; |
451 | ||
55f91cb6 | 452 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
ac019151 CM |
453 | /* A list of proc entries for this interface. */ |
454 | struct mutex proc_entry_lock; | |
1da177e4 | 455 | struct ipmi_proc_entry *proc_entries; |
55f91cb6 CM |
456 | |
457 | struct proc_dir_entry *proc_dir; | |
458 | char proc_dir_name[10]; | |
3b625943 | 459 | #endif |
1da177e4 | 460 | |
50c812b2 CM |
461 | /* Driver-model device for the system interface. */ |
462 | struct device *si_dev; | |
463 | ||
c70d7499 CM |
464 | /* |
465 | * A table of sequence numbers for this interface. We use the | |
466 | * sequence numbers for IPMB messages that go out of the | |
467 | * interface to match them up with their responses. A routine | |
468 | * is called periodically to time the items in this list. | |
469 | */ | |
1da177e4 LT |
470 | spinlock_t seq_lock; |
471 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
472 | int curr_seq; | |
473 | ||
c70d7499 | 474 | /* |
7adf579c CM |
475 | * Messages queued for delivery. If delivery fails (out of memory |
476 | * for instance), They will stay in here to be processed later in a | |
477 | * periodic timer interrupt. The tasklet is for handling received | |
478 | * messages directly from the handler. | |
c70d7499 | 479 | */ |
65be7544 CM |
480 | spinlock_t waiting_rcv_msgs_lock; |
481 | struct list_head waiting_rcv_msgs; | |
7adf579c CM |
482 | atomic_t watchdog_pretimeouts_to_deliver; |
483 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 484 | |
7ea0ed2b CM |
485 | spinlock_t xmit_msgs_lock; |
486 | struct list_head xmit_msgs; | |
487 | struct ipmi_smi_msg *curr_msg; | |
488 | struct list_head hp_xmit_msgs; | |
489 | ||
c70d7499 CM |
490 | /* |
491 | * The list of command receivers that are registered for commands | |
492 | * on this interface. | |
493 | */ | |
d6dfd131 | 494 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
495 | struct list_head cmd_rcvrs; |
496 | ||
c70d7499 CM |
497 | /* |
498 | * Events that were queues because no one was there to receive | |
499 | * them. | |
500 | */ | |
1da177e4 LT |
501 | spinlock_t events_lock; /* For dealing with event stuff. */ |
502 | struct list_head waiting_events; | |
503 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
504 | char delivering_events; |
505 | char event_msg_printed; | |
89986496 CM |
506 | atomic_t event_waiters; |
507 | unsigned int ticks_to_req_ev; | |
508 | int last_needs_timer; | |
1da177e4 | 509 | |
c70d7499 CM |
510 | /* |
511 | * The event receiver for my BMC, only really used at panic | |
512 | * shutdown as a place to store this. | |
513 | */ | |
1da177e4 LT |
514 | unsigned char event_receiver; |
515 | unsigned char event_receiver_lun; | |
516 | unsigned char local_sel_device; | |
517 | unsigned char local_event_generator; | |
518 | ||
b9675136 CM |
519 | /* For handling of maintenance mode. */ |
520 | int maintenance_mode; | |
7aefac26 | 521 | bool maintenance_mode_enable; |
b9675136 CM |
522 | int auto_maintenance_timeout; |
523 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
524 | ||
c70d7499 CM |
525 | /* |
526 | * A cheap hack, if this is non-null and a message to an | |
527 | * interface comes in with a NULL user, call this routine with | |
528 | * it. Note that the message will still be freed by the | |
529 | * caller. This only works on the system interface. | |
aa9c9ab2 | 530 | * |
b2cfd8ab | 531 | * Protected by bmc_reg_mutex. |
c70d7499 | 532 | */ |
56a55ec6 | 533 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 534 | |
c70d7499 CM |
535 | /* |
536 | * When we are scanning the channels for an SMI, this will | |
537 | * tell which channel we are scanning. | |
538 | */ | |
1da177e4 LT |
539 | int curr_channel; |
540 | ||
541 | /* Channel information */ | |
31b0b073 CM |
542 | struct ipmi_channel_set *channel_list; |
543 | unsigned int curr_working_cset; /* First index into the following. */ | |
544 | struct ipmi_channel_set wchannels[2]; | |
5fdb1fb2 | 545 | struct ipmi_my_addrinfo addrinfo[IPMI_MAX_CHANNELS]; |
31b0b073 | 546 | bool channels_ready; |
1da177e4 | 547 | |
b2655f26 | 548 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
549 | |
550 | /* | |
551 | * run_to_completion duplicate of smb_info, smi_info | |
552 | * and ipmi_serial_info structures. Used to decrease numbers of | |
553 | * parameters passed by "low" level IPMI code. | |
554 | */ | |
555 | int run_to_completion; | |
1da177e4 | 556 | }; |
50c812b2 | 557 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 558 | |
28f26ac7 | 559 | static void __get_guid(ipmi_smi_t intf); |
b2cfd8ab CM |
560 | static void __ipmi_bmc_unregister(ipmi_smi_t intf); |
561 | static int __ipmi_bmc_register(ipmi_smi_t intf, | |
562 | struct ipmi_device_id *id, | |
3fd32f9e | 563 | bool guid_set, guid_t *guid, int intf_num); |
31b0b073 | 564 | static int __scan_channels(ipmi_smi_t intf, struct ipmi_device_id *id); |
b2cfd8ab | 565 | |
28f26ac7 | 566 | |
50c812b2 CM |
567 | /** |
568 | * The driver model view of the IPMI messaging driver. | |
569 | */ | |
fe2d5ffc DW |
570 | static struct platform_driver ipmidriver = { |
571 | .driver = { | |
572 | .name = "ipmi", | |
573 | .bus = &platform_bus_type | |
574 | } | |
50c812b2 | 575 | }; |
9ca15af3 | 576 | /* |
b2cfd8ab | 577 | * This mutex keeps us from adding the same BMC twice. |
9ca15af3 | 578 | */ |
50c812b2 CM |
579 | static DEFINE_MUTEX(ipmidriver_mutex); |
580 | ||
bed9759b | 581 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 582 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 583 | |
c70d7499 CM |
584 | /* |
585 | * List of watchers that want to know when smi's are added and deleted. | |
586 | */ | |
bed9759b | 587 | static LIST_HEAD(smi_watchers); |
b2c03941 | 588 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 589 | |
b2655f26 KB |
590 | #define ipmi_inc_stat(intf, stat) \ |
591 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
592 | #define ipmi_get_stat(intf, stat) \ | |
593 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
594 | ||
99ee6735 LC |
595 | static const char * const addr_src_to_str[] = { |
596 | "invalid", "hotmod", "hardcoded", "SPMI", "ACPI", "SMBIOS", "PCI", | |
95e300c0 | 597 | "device-tree", "platform" |
99ee6735 | 598 | }; |
7e50387b CM |
599 | |
600 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src) | |
601 | { | |
b07b58a3 | 602 | if (src >= SI_LAST) |
7e50387b CM |
603 | src = 0; /* Invalid */ |
604 | return addr_src_to_str[src]; | |
605 | } | |
606 | EXPORT_SYMBOL(ipmi_addr_src_to_str); | |
607 | ||
25176ed6 CM |
608 | static int is_lan_addr(struct ipmi_addr *addr) |
609 | { | |
610 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
611 | } | |
612 | ||
613 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
614 | { | |
615 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
616 | } | |
617 | ||
618 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
619 | { | |
620 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
621 | } | |
b2655f26 | 622 | |
393d2cc3 CM |
623 | static void free_recv_msg_list(struct list_head *q) |
624 | { | |
625 | struct ipmi_recv_msg *msg, *msg2; | |
626 | ||
627 | list_for_each_entry_safe(msg, msg2, q, link) { | |
628 | list_del(&msg->link); | |
629 | ipmi_free_recv_msg(msg); | |
630 | } | |
631 | } | |
632 | ||
f3ce6a0e CM |
633 | static void free_smi_msg_list(struct list_head *q) |
634 | { | |
635 | struct ipmi_smi_msg *msg, *msg2; | |
636 | ||
637 | list_for_each_entry_safe(msg, msg2, q, link) { | |
638 | list_del(&msg->link); | |
639 | ipmi_free_smi_msg(msg); | |
640 | } | |
641 | } | |
642 | ||
393d2cc3 CM |
643 | static void clean_up_interface_data(ipmi_smi_t intf) |
644 | { | |
645 | int i; | |
646 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
647 | struct list_head list; |
648 | ||
7adf579c CM |
649 | tasklet_kill(&intf->recv_tasklet); |
650 | ||
65be7544 | 651 | free_smi_msg_list(&intf->waiting_rcv_msgs); |
393d2cc3 CM |
652 | free_recv_msg_list(&intf->waiting_events); |
653 | ||
78ba2faf CM |
654 | /* |
655 | * Wholesale remove all the entries from the list in the | |
656 | * interface and wait for RCU to know that none are in use. | |
657 | */ | |
d6dfd131 | 658 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
659 | INIT_LIST_HEAD(&list); |
660 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 661 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
662 | |
663 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
664 | kfree(rcvr); | |
665 | ||
666 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
667 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 668 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 669 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
670 | } |
671 | } | |
672 | ||
673 | static void intf_free(struct kref *ref) | |
674 | { | |
675 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
676 | ||
677 | clean_up_interface_data(intf); | |
678 | kfree(intf); | |
679 | } | |
680 | ||
bca0324d | 681 | struct watcher_entry { |
b2c03941 CM |
682 | int intf_num; |
683 | ipmi_smi_t intf; | |
bca0324d | 684 | struct list_head link; |
bca0324d CM |
685 | }; |
686 | ||
1da177e4 LT |
687 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
688 | { | |
bca0324d | 689 | ipmi_smi_t intf; |
e381d1c4 | 690 | LIST_HEAD(to_deliver); |
bca0324d CM |
691 | struct watcher_entry *e, *e2; |
692 | ||
b2c03941 CM |
693 | mutex_lock(&smi_watchers_mutex); |
694 | ||
bca0324d CM |
695 | mutex_lock(&ipmi_interfaces_mutex); |
696 | ||
b2c03941 | 697 | /* Build a list of things to deliver. */ |
78ba2faf | 698 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
699 | if (intf->intf_num == -1) |
700 | continue; | |
701 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
702 | if (!e) | |
703 | goto out_err; | |
b2c03941 CM |
704 | kref_get(&intf->refcount); |
705 | e->intf = intf; | |
bca0324d CM |
706 | e->intf_num = intf->intf_num; |
707 | list_add_tail(&e->link, &to_deliver); | |
708 | } | |
1da177e4 | 709 | |
b2c03941 CM |
710 | /* We will succeed, so add it to the list. */ |
711 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
712 | |
713 | mutex_unlock(&ipmi_interfaces_mutex); | |
714 | ||
715 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
716 | list_del(&e->link); | |
b2c03941 CM |
717 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
718 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 719 | kfree(e); |
1da177e4 | 720 | } |
bca0324d | 721 | |
b2c03941 | 722 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 723 | |
1da177e4 | 724 | return 0; |
bca0324d CM |
725 | |
726 | out_err: | |
b2c03941 CM |
727 | mutex_unlock(&ipmi_interfaces_mutex); |
728 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
729 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
730 | list_del(&e->link); | |
b2c03941 | 731 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
732 | kfree(e); |
733 | } | |
734 | return -ENOMEM; | |
1da177e4 | 735 | } |
c70d7499 | 736 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
737 | |
738 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
739 | { | |
b2c03941 | 740 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 741 | list_del(&(watcher->link)); |
b2c03941 | 742 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
743 | return 0; |
744 | } | |
c70d7499 | 745 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 746 | |
b2c03941 CM |
747 | /* |
748 | * Must be called with smi_watchers_mutex held. | |
749 | */ | |
1da177e4 | 750 | static void |
50c812b2 | 751 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
752 | { |
753 | struct ipmi_smi_watcher *w; | |
754 | ||
1da177e4 LT |
755 | list_for_each_entry(w, &smi_watchers, link) { |
756 | if (try_module_get(w->owner)) { | |
50c812b2 | 757 | w->new_smi(i, dev); |
1da177e4 LT |
758 | module_put(w->owner); |
759 | } | |
760 | } | |
1da177e4 LT |
761 | } |
762 | ||
763 | static int | |
764 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
765 | { | |
766 | if (addr1->addr_type != addr2->addr_type) | |
767 | return 0; | |
768 | ||
769 | if (addr1->channel != addr2->channel) | |
770 | return 0; | |
771 | ||
772 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
773 | struct ipmi_system_interface_addr *smi_addr1 | |
774 | = (struct ipmi_system_interface_addr *) addr1; | |
775 | struct ipmi_system_interface_addr *smi_addr2 | |
776 | = (struct ipmi_system_interface_addr *) addr2; | |
777 | return (smi_addr1->lun == smi_addr2->lun); | |
778 | } | |
779 | ||
25176ed6 | 780 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
781 | struct ipmi_ipmb_addr *ipmb_addr1 |
782 | = (struct ipmi_ipmb_addr *) addr1; | |
783 | struct ipmi_ipmb_addr *ipmb_addr2 | |
784 | = (struct ipmi_ipmb_addr *) addr2; | |
785 | ||
786 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
787 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
788 | } | |
789 | ||
25176ed6 | 790 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
791 | struct ipmi_lan_addr *lan_addr1 |
792 | = (struct ipmi_lan_addr *) addr1; | |
793 | struct ipmi_lan_addr *lan_addr2 | |
794 | = (struct ipmi_lan_addr *) addr2; | |
795 | ||
796 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
797 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
798 | && (lan_addr1->session_handle | |
799 | == lan_addr2->session_handle) | |
800 | && (lan_addr1->lun == lan_addr2->lun)); | |
801 | } | |
802 | ||
803 | return 1; | |
804 | } | |
805 | ||
806 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
807 | { | |
c70d7499 | 808 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 809 | return -EINVAL; |
1da177e4 LT |
810 | |
811 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
812 | if (addr->channel != IPMI_BMC_CHANNEL) | |
813 | return -EINVAL; | |
814 | return 0; | |
815 | } | |
816 | ||
817 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 818 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
819 | || (addr->channel < 0)) |
820 | return -EINVAL; | |
821 | ||
25176ed6 | 822 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 823 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 824 | return -EINVAL; |
1da177e4 LT |
825 | return 0; |
826 | } | |
827 | ||
25176ed6 | 828 | if (is_lan_addr(addr)) { |
c70d7499 | 829 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 830 | return -EINVAL; |
1da177e4 LT |
831 | return 0; |
832 | } | |
833 | ||
834 | return -EINVAL; | |
835 | } | |
c70d7499 | 836 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
837 | |
838 | unsigned int ipmi_addr_length(int addr_type) | |
839 | { | |
840 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
841 | return sizeof(struct ipmi_system_interface_addr); | |
842 | ||
843 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 844 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 845 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
846 | |
847 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
848 | return sizeof(struct ipmi_lan_addr); | |
849 | ||
850 | return 0; | |
851 | } | |
c70d7499 | 852 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
853 | |
854 | static void deliver_response(struct ipmi_recv_msg *msg) | |
855 | { | |
8a3628d5 | 856 | if (!msg->user) { |
56a55ec6 | 857 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
858 | |
859 | /* Special handling for NULL users. */ | |
860 | if (intf->null_user_handler) { | |
861 | intf->null_user_handler(intf, msg); | |
b2655f26 | 862 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
863 | } else { |
864 | /* No handler, so give up. */ | |
b2655f26 | 865 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
866 | } |
867 | ipmi_free_recv_msg(msg); | |
c49c0976 HK |
868 | } else if (!oops_in_progress) { |
869 | /* | |
870 | * If we are running in the panic context, calling the | |
871 | * receive handler doesn't much meaning and has a deadlock | |
872 | * risk. At this moment, simply skip it in that case. | |
873 | */ | |
874 | ||
393d2cc3 CM |
875 | ipmi_user_t user = msg->user; |
876 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 877 | } |
1da177e4 LT |
878 | } |
879 | ||
b2c03941 CM |
880 | static void |
881 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
882 | { | |
883 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
884 | msg->msg_data[0] = err; | |
885 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
886 | msg->msg.data_len = 1; | |
887 | msg->msg.data = msg->msg_data; | |
888 | deliver_response(msg); | |
889 | } | |
890 | ||
c70d7499 CM |
891 | /* |
892 | * Find the next sequence number not being used and add the given | |
893 | * message with the given timeout to the sequence table. This must be | |
894 | * called with the interface's seq_lock held. | |
895 | */ | |
1da177e4 LT |
896 | static int intf_next_seq(ipmi_smi_t intf, |
897 | struct ipmi_recv_msg *recv_msg, | |
898 | unsigned long timeout, | |
899 | int retries, | |
900 | int broadcast, | |
901 | unsigned char *seq, | |
902 | long *seqid) | |
903 | { | |
904 | int rv = 0; | |
905 | unsigned int i; | |
906 | ||
c70d7499 CM |
907 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
908 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 909 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
910 | break; |
911 | } | |
912 | ||
8a3628d5 | 913 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
914 | intf->seq_table[i].recv_msg = recv_msg; |
915 | ||
c70d7499 CM |
916 | /* |
917 | * Start with the maximum timeout, when the send response | |
918 | * comes in we will start the real timer. | |
919 | */ | |
1da177e4 LT |
920 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
921 | intf->seq_table[i].orig_timeout = timeout; | |
922 | intf->seq_table[i].retries_left = retries; | |
923 | intf->seq_table[i].broadcast = broadcast; | |
924 | intf->seq_table[i].inuse = 1; | |
925 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
926 | *seq = i; | |
927 | *seqid = intf->seq_table[i].seqid; | |
928 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 929 | need_waiter(intf); |
1da177e4 LT |
930 | } else { |
931 | rv = -EAGAIN; | |
932 | } | |
c70d7499 | 933 | |
1da177e4 LT |
934 | return rv; |
935 | } | |
936 | ||
c70d7499 CM |
937 | /* |
938 | * Return the receive message for the given sequence number and | |
939 | * release the sequence number so it can be reused. Some other data | |
940 | * is passed in to be sure the message matches up correctly (to help | |
941 | * guard against message coming in after their timeout and the | |
942 | * sequence number being reused). | |
943 | */ | |
1da177e4 LT |
944 | static int intf_find_seq(ipmi_smi_t intf, |
945 | unsigned char seq, | |
946 | short channel, | |
947 | unsigned char cmd, | |
948 | unsigned char netfn, | |
949 | struct ipmi_addr *addr, | |
950 | struct ipmi_recv_msg **recv_msg) | |
951 | { | |
952 | int rv = -ENODEV; | |
953 | unsigned long flags; | |
954 | ||
955 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
956 | return -EINVAL; | |
957 | ||
958 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
959 | if (intf->seq_table[seq].inuse) { | |
960 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
961 | ||
c70d7499 CM |
962 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
963 | && (msg->msg.netfn == netfn) | |
964 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
965 | *recv_msg = msg; |
966 | intf->seq_table[seq].inuse = 0; | |
967 | rv = 0; | |
968 | } | |
969 | } | |
970 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
971 | ||
972 | return rv; | |
973 | } | |
974 | ||
975 | ||
976 | /* Start the timer for a specific sequence table entry. */ | |
977 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
978 | long msgid) | |
979 | { | |
980 | int rv = -ENODEV; | |
981 | unsigned long flags; | |
982 | unsigned char seq; | |
983 | unsigned long seqid; | |
984 | ||
985 | ||
986 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
987 | ||
988 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
989 | /* |
990 | * We do this verification because the user can be deleted | |
991 | * while a message is outstanding. | |
992 | */ | |
1da177e4 | 993 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 994 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
995 | struct seq_table *ent = &(intf->seq_table[seq]); |
996 | ent->timeout = ent->orig_timeout; | |
997 | rv = 0; | |
998 | } | |
999 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1000 | ||
1001 | return rv; | |
1002 | } | |
1003 | ||
1004 | /* Got an error for the send message for a specific sequence number. */ | |
1005 | static int intf_err_seq(ipmi_smi_t intf, | |
1006 | long msgid, | |
1007 | unsigned int err) | |
1008 | { | |
1009 | int rv = -ENODEV; | |
1010 | unsigned long flags; | |
1011 | unsigned char seq; | |
1012 | unsigned long seqid; | |
1013 | struct ipmi_recv_msg *msg = NULL; | |
1014 | ||
1015 | ||
1016 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
1017 | ||
1018 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
1019 | /* |
1020 | * We do this verification because the user can be deleted | |
1021 | * while a message is outstanding. | |
1022 | */ | |
1da177e4 | 1023 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 1024 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
1025 | struct seq_table *ent = &(intf->seq_table[seq]); |
1026 | ||
1027 | ent->inuse = 0; | |
1028 | msg = ent->recv_msg; | |
1029 | rv = 0; | |
1030 | } | |
1031 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
1032 | ||
b2c03941 CM |
1033 | if (msg) |
1034 | deliver_err_response(msg, err); | |
1da177e4 LT |
1035 | |
1036 | return rv; | |
1037 | } | |
1038 | ||
1039 | ||
1040 | int ipmi_create_user(unsigned int if_num, | |
210af2a5 | 1041 | const struct ipmi_user_hndl *handler, |
1da177e4 LT |
1042 | void *handler_data, |
1043 | ipmi_user_t *user) | |
1044 | { | |
1045 | unsigned long flags; | |
1046 | ipmi_user_t new_user; | |
1047 | int rv = 0; | |
1048 | ipmi_smi_t intf; | |
1049 | ||
c70d7499 CM |
1050 | /* |
1051 | * There is no module usecount here, because it's not | |
1052 | * required. Since this can only be used by and called from | |
1053 | * other modules, they will implicitly use this module, and | |
1054 | * thus this can't be removed unless the other modules are | |
1055 | * removed. | |
1056 | */ | |
1da177e4 LT |
1057 | |
1058 | if (handler == NULL) | |
1059 | return -EINVAL; | |
1060 | ||
c70d7499 CM |
1061 | /* |
1062 | * Make sure the driver is actually initialized, this handles | |
1063 | * problems with initialization order. | |
1064 | */ | |
1da177e4 LT |
1065 | if (!initialized) { |
1066 | rv = ipmi_init_msghandler(); | |
1067 | if (rv) | |
1068 | return rv; | |
1069 | ||
c70d7499 CM |
1070 | /* |
1071 | * The init code doesn't return an error if it was turned | |
1072 | * off, but it won't initialize. Check that. | |
1073 | */ | |
1da177e4 LT |
1074 | if (!initialized) |
1075 | return -ENODEV; | |
1076 | } | |
1077 | ||
1078 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 1079 | if (!new_user) |
1da177e4 LT |
1080 | return -ENOMEM; |
1081 | ||
b2c03941 | 1082 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
1083 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1084 | if (intf->intf_num == if_num) | |
1085 | goto found; | |
1da177e4 | 1086 | } |
b2c03941 | 1087 | /* Not found, return an error */ |
bca0324d CM |
1088 | rv = -EINVAL; |
1089 | goto out_kfree; | |
1da177e4 | 1090 | |
bca0324d | 1091 | found: |
393d2cc3 CM |
1092 | /* Note that each existing user holds a refcount to the interface. */ |
1093 | kref_get(&intf->refcount); | |
1da177e4 | 1094 | |
393d2cc3 | 1095 | kref_init(&new_user->refcount); |
1da177e4 LT |
1096 | new_user->handler = handler; |
1097 | new_user->handler_data = handler_data; | |
1098 | new_user->intf = intf; | |
89986496 | 1099 | new_user->gets_events = false; |
1da177e4 LT |
1100 | |
1101 | if (!try_module_get(intf->handlers->owner)) { | |
1102 | rv = -ENODEV; | |
5c98d29a | 1103 | goto out_kref; |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | if (intf->handlers->inc_usecount) { | |
1107 | rv = intf->handlers->inc_usecount(intf->send_info); | |
1108 | if (rv) { | |
1109 | module_put(intf->handlers->owner); | |
5c98d29a | 1110 | goto out_kref; |
1da177e4 LT |
1111 | } |
1112 | } | |
1113 | ||
c70d7499 CM |
1114 | /* |
1115 | * Hold the lock so intf->handlers is guaranteed to be good | |
1116 | * until now | |
1117 | */ | |
b2c03941 CM |
1118 | mutex_unlock(&ipmi_interfaces_mutex); |
1119 | ||
7aefac26 | 1120 | new_user->valid = true; |
393d2cc3 CM |
1121 | spin_lock_irqsave(&intf->seq_lock, flags); |
1122 | list_add_rcu(&new_user->link, &intf->users); | |
1123 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
1124 | if (handler->ipmi_watchdog_pretimeout) { |
1125 | /* User wants pretimeouts, so make sure to watch for them. */ | |
1126 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1127 | need_waiter(intf); | |
1128 | } | |
393d2cc3 CM |
1129 | *user = new_user; |
1130 | return 0; | |
1da177e4 | 1131 | |
5c98d29a | 1132 | out_kref: |
393d2cc3 | 1133 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 1134 | out_kfree: |
b2c03941 | 1135 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 1136 | kfree(new_user); |
1da177e4 LT |
1137 | return rv; |
1138 | } | |
c70d7499 | 1139 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1140 | |
16f4232c ZY |
1141 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1142 | { | |
1143 | int rv = 0; | |
1144 | ipmi_smi_t intf; | |
81d02b7f | 1145 | const struct ipmi_smi_handlers *handlers; |
16f4232c ZY |
1146 | |
1147 | mutex_lock(&ipmi_interfaces_mutex); | |
1148 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1149 | if (intf->intf_num == if_num) | |
1150 | goto found; | |
1151 | } | |
1152 | /* Not found, return an error */ | |
1153 | rv = -EINVAL; | |
1154 | mutex_unlock(&ipmi_interfaces_mutex); | |
1155 | return rv; | |
1156 | ||
1157 | found: | |
1158 | handlers = intf->handlers; | |
1159 | rv = -ENOSYS; | |
1160 | if (handlers->get_smi_info) | |
1161 | rv = handlers->get_smi_info(intf->send_info, data); | |
1162 | mutex_unlock(&ipmi_interfaces_mutex); | |
1163 | ||
1164 | return rv; | |
1165 | } | |
1166 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1167 | ||
393d2cc3 CM |
1168 | static void free_user(struct kref *ref) |
1169 | { | |
1170 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1171 | kfree(user); | |
1172 | } | |
1173 | ||
1174 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1175 | { |
393d2cc3 | 1176 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1177 | int i; |
1178 | unsigned long flags; | |
393d2cc3 | 1179 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1180 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1181 | |
7aefac26 | 1182 | user->valid = false; |
1da177e4 | 1183 | |
89986496 CM |
1184 | if (user->handler->ipmi_watchdog_pretimeout) |
1185 | atomic_dec(&intf->event_waiters); | |
1186 | ||
1187 | if (user->gets_events) | |
1188 | atomic_dec(&intf->event_waiters); | |
1189 | ||
393d2cc3 CM |
1190 | /* Remove the user from the interface's sequence table. */ |
1191 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1192 | list_del_rcu(&user->link); | |
1da177e4 | 1193 | |
e8b33617 | 1194 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1195 | if (intf->seq_table[i].inuse |
c70d7499 | 1196 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1197 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1198 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1199 | } |
1200 | } | |
393d2cc3 CM |
1201 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1202 | ||
1203 | /* | |
1204 | * Remove the user from the command receiver's table. First | |
1205 | * we build a list of everything (not using the standard link, | |
1206 | * since other things may be using it till we do | |
1207 | * synchronize_rcu()) then free everything in that list. | |
1208 | */ | |
d6dfd131 | 1209 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1210 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1211 | if (rcvr->user == user) { |
393d2cc3 CM |
1212 | list_del_rcu(&rcvr->link); |
1213 | rcvr->next = rcvrs; | |
1214 | rcvrs = rcvr; | |
1da177e4 LT |
1215 | } |
1216 | } | |
d6dfd131 | 1217 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1218 | synchronize_rcu(); |
1219 | while (rcvrs) { | |
1220 | rcvr = rcvrs; | |
1221 | rcvrs = rcvr->next; | |
1222 | kfree(rcvr); | |
1223 | } | |
1da177e4 | 1224 | |
b2c03941 CM |
1225 | mutex_lock(&ipmi_interfaces_mutex); |
1226 | if (intf->handlers) { | |
1227 | module_put(intf->handlers->owner); | |
1228 | if (intf->handlers->dec_usecount) | |
1229 | intf->handlers->dec_usecount(intf->send_info); | |
1230 | } | |
1231 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1232 | |
393d2cc3 | 1233 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1234 | |
393d2cc3 | 1235 | kref_put(&user->refcount, free_user); |
1da177e4 | 1236 | |
8a3628d5 | 1237 | return 0; |
1da177e4 | 1238 | } |
c70d7499 | 1239 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 | 1240 | |
511d57dc CM |
1241 | int ipmi_get_version(ipmi_user_t user, |
1242 | unsigned char *major, | |
1243 | unsigned char *minor) | |
1da177e4 | 1244 | { |
511d57dc CM |
1245 | struct ipmi_device_id id; |
1246 | int rv; | |
1247 | ||
39d3fb45 | 1248 | rv = bmc_get_device_id(user->intf, NULL, &id, NULL, NULL); |
511d57dc CM |
1249 | if (rv) |
1250 | return rv; | |
1251 | ||
1252 | *major = ipmi_version_major(&id); | |
1253 | *minor = ipmi_version_minor(&id); | |
1254 | ||
1255 | return 0; | |
1da177e4 | 1256 | } |
c70d7499 | 1257 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1258 | |
c14979b9 CM |
1259 | int ipmi_set_my_address(ipmi_user_t user, |
1260 | unsigned int channel, | |
1261 | unsigned char address) | |
1da177e4 | 1262 | { |
c14979b9 CM |
1263 | if (channel >= IPMI_MAX_CHANNELS) |
1264 | return -EINVAL; | |
5fdb1fb2 | 1265 | user->intf->addrinfo[channel].address = address; |
c14979b9 | 1266 | return 0; |
1da177e4 | 1267 | } |
c70d7499 | 1268 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1269 | |
c14979b9 CM |
1270 | int ipmi_get_my_address(ipmi_user_t user, |
1271 | unsigned int channel, | |
1272 | unsigned char *address) | |
1da177e4 | 1273 | { |
c14979b9 CM |
1274 | if (channel >= IPMI_MAX_CHANNELS) |
1275 | return -EINVAL; | |
5fdb1fb2 | 1276 | *address = user->intf->addrinfo[channel].address; |
c14979b9 | 1277 | return 0; |
1da177e4 | 1278 | } |
c70d7499 | 1279 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1280 | |
c14979b9 CM |
1281 | int ipmi_set_my_LUN(ipmi_user_t user, |
1282 | unsigned int channel, | |
1283 | unsigned char LUN) | |
1da177e4 | 1284 | { |
c14979b9 CM |
1285 | if (channel >= IPMI_MAX_CHANNELS) |
1286 | return -EINVAL; | |
5fdb1fb2 | 1287 | user->intf->addrinfo[channel].lun = LUN & 0x3; |
c14979b9 | 1288 | return 0; |
1da177e4 | 1289 | } |
c70d7499 | 1290 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1291 | |
c14979b9 CM |
1292 | int ipmi_get_my_LUN(ipmi_user_t user, |
1293 | unsigned int channel, | |
1294 | unsigned char *address) | |
1da177e4 | 1295 | { |
c14979b9 CM |
1296 | if (channel >= IPMI_MAX_CHANNELS) |
1297 | return -EINVAL; | |
5fdb1fb2 | 1298 | *address = user->intf->addrinfo[channel].lun; |
c14979b9 | 1299 | return 0; |
1da177e4 | 1300 | } |
c70d7499 | 1301 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1302 | |
b9675136 CM |
1303 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1304 | { | |
1305 | int mode; | |
1306 | unsigned long flags; | |
1307 | ||
1308 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1309 | mode = user->intf->maintenance_mode; | |
1310 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1311 | ||
1312 | return mode; | |
1313 | } | |
1314 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1315 | ||
1316 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1317 | { | |
1318 | if (intf->handlers->set_maintenance_mode) | |
1319 | intf->handlers->set_maintenance_mode( | |
1320 | intf->send_info, intf->maintenance_mode_enable); | |
1321 | } | |
1322 | ||
1323 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1324 | { | |
1325 | int rv = 0; | |
1326 | unsigned long flags; | |
1327 | ipmi_smi_t intf = user->intf; | |
1328 | ||
1329 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1330 | if (intf->maintenance_mode != mode) { | |
1331 | switch (mode) { | |
1332 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1333 | intf->maintenance_mode_enable |
1334 | = (intf->auto_maintenance_timeout > 0); | |
1335 | break; | |
1336 | ||
1337 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1338 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1339 | break; |
1340 | ||
1341 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1342 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1343 | break; |
1344 | ||
1345 | default: | |
1346 | rv = -EINVAL; | |
1347 | goto out_unlock; | |
1348 | } | |
7aefac26 | 1349 | intf->maintenance_mode = mode; |
b9675136 CM |
1350 | |
1351 | maintenance_mode_update(intf); | |
1352 | } | |
1353 | out_unlock: | |
1354 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1355 | ||
1356 | return rv; | |
1357 | } | |
1358 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1359 | ||
89986496 | 1360 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1361 | { |
393d2cc3 CM |
1362 | unsigned long flags; |
1363 | ipmi_smi_t intf = user->intf; | |
1364 | struct ipmi_recv_msg *msg, *msg2; | |
1365 | struct list_head msgs; | |
1da177e4 | 1366 | |
393d2cc3 CM |
1367 | INIT_LIST_HEAD(&msgs); |
1368 | ||
1369 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1370 | if (user->gets_events == val) |
1371 | goto out; | |
1372 | ||
1da177e4 LT |
1373 | user->gets_events = val; |
1374 | ||
89986496 CM |
1375 | if (val) { |
1376 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1377 | need_waiter(intf); | |
1378 | } else { | |
1379 | atomic_dec(&intf->event_waiters); | |
1380 | } | |
1381 | ||
b2c03941 CM |
1382 | if (intf->delivering_events) |
1383 | /* | |
1384 | * Another thread is delivering events for this, so | |
1385 | * let it handle any new events. | |
1386 | */ | |
1387 | goto out; | |
1388 | ||
1389 | /* Deliver any queued events. */ | |
1390 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1391 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1392 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1393 | intf->waiting_events_count = 0; |
87ebd06f | 1394 | if (intf->event_msg_printed) { |
106a8461 CM |
1395 | dev_warn(intf->si_dev, |
1396 | PFX "Event queue no longer full\n"); | |
87ebd06f CM |
1397 | intf->event_msg_printed = 0; |
1398 | } | |
393d2cc3 | 1399 | |
b2c03941 CM |
1400 | intf->delivering_events = 1; |
1401 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1402 | ||
1403 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1404 | msg->user = user; | |
1405 | kref_get(&user->refcount); | |
1406 | deliver_response(msg); | |
1407 | } | |
1408 | ||
1409 | spin_lock_irqsave(&intf->events_lock, flags); | |
1410 | intf->delivering_events = 0; | |
393d2cc3 CM |
1411 | } |
1412 | ||
b2c03941 | 1413 | out: |
393d2cc3 | 1414 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1415 | |
1416 | return 0; | |
1417 | } | |
c70d7499 | 1418 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1419 | |
393d2cc3 CM |
1420 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1421 | unsigned char netfn, | |
c69c3127 CM |
1422 | unsigned char cmd, |
1423 | unsigned char chan) | |
393d2cc3 CM |
1424 | { |
1425 | struct cmd_rcvr *rcvr; | |
1426 | ||
1427 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1428 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1429 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1430 | return rcvr; |
1431 | } | |
1432 | return NULL; | |
1433 | } | |
1434 | ||
c69c3127 CM |
1435 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1436 | unsigned char netfn, | |
1437 | unsigned char cmd, | |
1438 | unsigned int chans) | |
1439 | { | |
1440 | struct cmd_rcvr *rcvr; | |
1441 | ||
1442 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1443 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1444 | && (rcvr->chans & chans)) | |
1445 | return 0; | |
1446 | } | |
1447 | return 1; | |
1448 | } | |
1449 | ||
1da177e4 LT |
1450 | int ipmi_register_for_cmd(ipmi_user_t user, |
1451 | unsigned char netfn, | |
c69c3127 CM |
1452 | unsigned char cmd, |
1453 | unsigned int chans) | |
1da177e4 | 1454 | { |
393d2cc3 CM |
1455 | ipmi_smi_t intf = user->intf; |
1456 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1457 | int rv = 0; |
1da177e4 LT |
1458 | |
1459 | ||
1460 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1461 | if (!rcvr) |
1da177e4 | 1462 | return -ENOMEM; |
393d2cc3 CM |
1463 | rcvr->cmd = cmd; |
1464 | rcvr->netfn = netfn; | |
c69c3127 | 1465 | rcvr->chans = chans; |
393d2cc3 | 1466 | rcvr->user = user; |
1da177e4 | 1467 | |
d6dfd131 | 1468 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1469 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1470 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1471 | rv = -EBUSY; |
1472 | goto out_unlock; | |
1da177e4 | 1473 | } |
877197ef | 1474 | |
89986496 CM |
1475 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1476 | need_waiter(intf); | |
1477 | ||
393d2cc3 | 1478 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1479 | |
393d2cc3 | 1480 | out_unlock: |
d6dfd131 | 1481 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1482 | if (rv) |
1483 | kfree(rcvr); | |
1484 | ||
1485 | return rv; | |
1486 | } | |
c70d7499 | 1487 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1488 | |
1489 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1490 | unsigned char netfn, | |
c69c3127 CM |
1491 | unsigned char cmd, |
1492 | unsigned int chans) | |
1da177e4 | 1493 | { |
393d2cc3 CM |
1494 | ipmi_smi_t intf = user->intf; |
1495 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1496 | struct cmd_rcvr *rcvrs = NULL; |
1497 | int i, rv = -ENOENT; | |
1da177e4 | 1498 | |
d6dfd131 | 1499 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1500 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1501 | if (((1 << i) & chans) == 0) | |
1502 | continue; | |
1503 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1504 | if (rcvr == NULL) | |
1505 | continue; | |
1506 | if (rcvr->user == user) { | |
1507 | rv = 0; | |
1508 | rcvr->chans &= ~chans; | |
1509 | if (rcvr->chans == 0) { | |
1510 | list_del_rcu(&rcvr->link); | |
1511 | rcvr->next = rcvrs; | |
1512 | rcvrs = rcvr; | |
1513 | } | |
1514 | } | |
1515 | } | |
1516 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1517 | synchronize_rcu(); | |
1518 | while (rcvrs) { | |
89986496 | 1519 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1520 | rcvr = rcvrs; |
1521 | rcvrs = rcvr->next; | |
393d2cc3 | 1522 | kfree(rcvr); |
1da177e4 | 1523 | } |
c69c3127 | 1524 | return rv; |
1da177e4 | 1525 | } |
c70d7499 | 1526 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1527 | |
1da177e4 LT |
1528 | static unsigned char |
1529 | ipmb_checksum(unsigned char *data, int size) | |
1530 | { | |
1531 | unsigned char csum = 0; | |
c70d7499 | 1532 | |
1da177e4 LT |
1533 | for (; size > 0; size--, data++) |
1534 | csum += *data; | |
1535 | ||
1536 | return -csum; | |
1537 | } | |
1538 | ||
1539 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1540 | struct kernel_ipmi_msg *msg, | |
1541 | struct ipmi_ipmb_addr *ipmb_addr, | |
1542 | long msgid, | |
1543 | unsigned char ipmb_seq, | |
1544 | int broadcast, | |
1545 | unsigned char source_address, | |
1546 | unsigned char source_lun) | |
1547 | { | |
1548 | int i = broadcast; | |
1549 | ||
1550 | /* Format the IPMB header data. */ | |
1551 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1552 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1553 | smi_msg->data[2] = ipmb_addr->channel; | |
1554 | if (broadcast) | |
1555 | smi_msg->data[3] = 0; | |
1556 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1557 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1558 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1559 | smi_msg->data[i+6] = source_address; | |
1560 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1561 | smi_msg->data[i+8] = msg->cmd; | |
1562 | ||
1563 | /* Now tack on the data to the message. */ | |
1564 | if (msg->data_len > 0) | |
1565 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1566 | msg->data_len); | |
1567 | smi_msg->data_size = msg->data_len + 9; | |
1568 | ||
1569 | /* Now calculate the checksum and tack it on. */ | |
1570 | smi_msg->data[i+smi_msg->data_size] | |
1571 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1572 | smi_msg->data_size-6); | |
1573 | ||
c70d7499 CM |
1574 | /* |
1575 | * Add on the checksum size and the offset from the | |
1576 | * broadcast. | |
1577 | */ | |
1da177e4 LT |
1578 | smi_msg->data_size += 1 + i; |
1579 | ||
1580 | smi_msg->msgid = msgid; | |
1581 | } | |
1582 | ||
1583 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1584 | struct kernel_ipmi_msg *msg, | |
1585 | struct ipmi_lan_addr *lan_addr, | |
1586 | long msgid, | |
1587 | unsigned char ipmb_seq, | |
1588 | unsigned char source_lun) | |
1589 | { | |
1590 | /* Format the IPMB header data. */ | |
1591 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1592 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1593 | smi_msg->data[2] = lan_addr->channel; | |
1594 | smi_msg->data[3] = lan_addr->session_handle; | |
1595 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1596 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1597 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1598 | smi_msg->data[7] = lan_addr->local_SWID; | |
1599 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1600 | smi_msg->data[9] = msg->cmd; | |
1601 | ||
1602 | /* Now tack on the data to the message. */ | |
1603 | if (msg->data_len > 0) | |
1604 | memcpy(&(smi_msg->data[10]), msg->data, | |
1605 | msg->data_len); | |
1606 | smi_msg->data_size = msg->data_len + 10; | |
1607 | ||
1608 | /* Now calculate the checksum and tack it on. */ | |
1609 | smi_msg->data[smi_msg->data_size] | |
1610 | = ipmb_checksum(&(smi_msg->data[7]), | |
1611 | smi_msg->data_size-7); | |
1612 | ||
c70d7499 CM |
1613 | /* |
1614 | * Add on the checksum size and the offset from the | |
1615 | * broadcast. | |
1616 | */ | |
1da177e4 LT |
1617 | smi_msg->data_size += 1; |
1618 | ||
1619 | smi_msg->msgid = msgid; | |
1620 | } | |
1621 | ||
191cc414 AB |
1622 | static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf, |
1623 | struct ipmi_smi_msg *smi_msg, | |
1624 | int priority) | |
7f4a1c84 | 1625 | { |
7ea0ed2b CM |
1626 | if (intf->curr_msg) { |
1627 | if (priority > 0) | |
1628 | list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs); | |
1629 | else | |
1630 | list_add_tail(&smi_msg->link, &intf->xmit_msgs); | |
1631 | smi_msg = NULL; | |
1632 | } else { | |
1633 | intf->curr_msg = smi_msg; | |
1634 | } | |
191cc414 AB |
1635 | |
1636 | return smi_msg; | |
1637 | } | |
1638 | ||
1639 | ||
81d02b7f | 1640 | static void smi_send(ipmi_smi_t intf, const struct ipmi_smi_handlers *handlers, |
191cc414 AB |
1641 | struct ipmi_smi_msg *smi_msg, int priority) |
1642 | { | |
1643 | int run_to_completion = intf->run_to_completion; | |
1644 | ||
1645 | if (run_to_completion) { | |
1646 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
1647 | } else { | |
1648 | unsigned long flags; | |
1649 | ||
1650 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
1651 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
7ea0ed2b | 1652 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
191cc414 | 1653 | } |
7ea0ed2b CM |
1654 | |
1655 | if (smi_msg) | |
99ab32f3 | 1656 | handlers->sender(intf->send_info, smi_msg); |
7f4a1c84 CM |
1657 | } |
1658 | ||
c70d7499 CM |
1659 | /* |
1660 | * Separate from ipmi_request so that the user does not have to be | |
1661 | * supplied in certain circumstances (mainly at panic time). If | |
1662 | * messages are supplied, they will be freed, even if an error | |
1663 | * occurs. | |
1664 | */ | |
393d2cc3 CM |
1665 | static int i_ipmi_request(ipmi_user_t user, |
1666 | ipmi_smi_t intf, | |
1667 | struct ipmi_addr *addr, | |
1668 | long msgid, | |
1669 | struct kernel_ipmi_msg *msg, | |
1670 | void *user_msg_data, | |
1671 | void *supplied_smi, | |
1672 | struct ipmi_recv_msg *supplied_recv, | |
1673 | int priority, | |
1674 | unsigned char source_address, | |
1675 | unsigned char source_lun, | |
1676 | int retries, | |
1677 | unsigned int retry_time_ms) | |
1da177e4 | 1678 | { |
b2c03941 CM |
1679 | int rv = 0; |
1680 | struct ipmi_smi_msg *smi_msg; | |
1681 | struct ipmi_recv_msg *recv_msg; | |
1682 | unsigned long flags; | |
1da177e4 LT |
1683 | |
1684 | ||
c70d7499 | 1685 | if (supplied_recv) |
1da177e4 | 1686 | recv_msg = supplied_recv; |
c70d7499 | 1687 | else { |
1da177e4 | 1688 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1689 | if (recv_msg == NULL) |
1da177e4 | 1690 | return -ENOMEM; |
1da177e4 LT |
1691 | } |
1692 | recv_msg->user_msg_data = user_msg_data; | |
1693 | ||
c70d7499 | 1694 | if (supplied_smi) |
1da177e4 | 1695 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1696 | else { |
1da177e4 LT |
1697 | smi_msg = ipmi_alloc_smi_msg(); |
1698 | if (smi_msg == NULL) { | |
1699 | ipmi_free_recv_msg(recv_msg); | |
1700 | return -ENOMEM; | |
1701 | } | |
1702 | } | |
1703 | ||
b2c03941 | 1704 | rcu_read_lock(); |
7ea0ed2b | 1705 | if (intf->in_shutdown) { |
b2c03941 CM |
1706 | rv = -ENODEV; |
1707 | goto out_err; | |
1708 | } | |
1709 | ||
1da177e4 | 1710 | recv_msg->user = user; |
393d2cc3 CM |
1711 | if (user) |
1712 | kref_get(&user->refcount); | |
1da177e4 | 1713 | recv_msg->msgid = msgid; |
c70d7499 CM |
1714 | /* |
1715 | * Store the message to send in the receive message so timeout | |
1716 | * responses can get the proper response data. | |
1717 | */ | |
1da177e4 LT |
1718 | recv_msg->msg = *msg; |
1719 | ||
1720 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1721 | struct ipmi_system_interface_addr *smi_addr; | |
1722 | ||
1723 | if (msg->netfn & 1) { | |
1724 | /* Responses are not allowed to the SMI. */ | |
1725 | rv = -EINVAL; | |
1726 | goto out_err; | |
1727 | } | |
1728 | ||
1729 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1730 | if (smi_addr->lun > 3) { | |
b2655f26 | 1731 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1732 | rv = -EINVAL; |
1733 | goto out_err; | |
1734 | } | |
1735 | ||
1736 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1737 | ||
1738 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1739 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1740 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1741 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1742 | /* | |
1743 | * We don't let the user do these, since we manage | |
1744 | * the sequence numbers. | |
1745 | */ | |
b2655f26 | 1746 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1747 | rv = -EINVAL; |
1748 | goto out_err; | |
1749 | } | |
1750 | ||
b9675136 CM |
1751 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1752 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1753 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1754 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1755 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1756 | intf->auto_maintenance_timeout | |
1757 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1758 | if (!intf->maintenance_mode | |
c70d7499 | 1759 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1760 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1761 | maintenance_mode_update(intf); |
1762 | } | |
1763 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1764 | flags); | |
1765 | } | |
1766 | ||
1da177e4 | 1767 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1768 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1769 | rv = -EMSGSIZE; |
1770 | goto out_err; | |
1771 | } | |
1772 | ||
1773 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1774 | smi_msg->data[1] = msg->cmd; | |
1775 | smi_msg->msgid = msgid; | |
1776 | smi_msg->user_data = recv_msg; | |
1777 | if (msg->data_len > 0) | |
1778 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1779 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1780 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1781 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1782 | struct ipmi_ipmb_addr *ipmb_addr; |
1783 | unsigned char ipmb_seq; | |
1784 | long seqid; | |
1785 | int broadcast = 0; | |
31b0b073 | 1786 | struct ipmi_channel *chans; |
1da177e4 | 1787 | |
9c101fd4 | 1788 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1789 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1790 | rv = -EINVAL; |
1791 | goto out_err; | |
1792 | } | |
1793 | ||
31b0b073 CM |
1794 | chans = READ_ONCE(intf->channel_list)->c; |
1795 | ||
1796 | if (chans[addr->channel].medium != IPMI_CHANNEL_MEDIUM_IPMB) { | |
b2655f26 | 1797 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1798 | rv = -EINVAL; |
1799 | goto out_err; | |
1800 | } | |
1801 | ||
1802 | if (retries < 0) { | |
1803 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1804 | retries = 0; /* Don't retry broadcasts. */ | |
1805 | else | |
1806 | retries = 4; | |
1807 | } | |
1808 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1809 | /* |
1810 | * Broadcasts add a zero at the beginning of the | |
1811 | * message, but otherwise is the same as an IPMB | |
1812 | * address. | |
1813 | */ | |
1da177e4 LT |
1814 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1815 | broadcast = 1; | |
1816 | } | |
1817 | ||
1818 | ||
1819 | /* Default to 1 second retries. */ | |
1820 | if (retry_time_ms == 0) | |
1821 | retry_time_ms = 1000; | |
1822 | ||
c70d7499 CM |
1823 | /* |
1824 | * 9 for the header and 1 for the checksum, plus | |
1825 | * possibly one for the broadcast. | |
1826 | */ | |
1da177e4 | 1827 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1828 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1829 | rv = -EMSGSIZE; |
1830 | goto out_err; | |
1831 | } | |
1832 | ||
1833 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1834 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1835 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1836 | rv = -EINVAL; |
1837 | goto out_err; | |
1838 | } | |
1839 | ||
1840 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1841 | ||
1842 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1843 | /* |
1844 | * It's a response, so use the user's sequence | |
1845 | * from msgid. | |
1846 | */ | |
b2655f26 | 1847 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1848 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1849 | msgid, broadcast, | |
1850 | source_address, source_lun); | |
1851 | ||
c70d7499 CM |
1852 | /* |
1853 | * Save the receive message so we can use it | |
1854 | * to deliver the response. | |
1855 | */ | |
1da177e4 LT |
1856 | smi_msg->user_data = recv_msg; |
1857 | } else { | |
1858 | /* It's a command, so get a sequence for it. */ | |
1859 | ||
1860 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1861 | ||
c70d7499 CM |
1862 | /* |
1863 | * Create a sequence number with a 1 second | |
1864 | * timeout and 4 retries. | |
1865 | */ | |
1da177e4 LT |
1866 | rv = intf_next_seq(intf, |
1867 | recv_msg, | |
1868 | retry_time_ms, | |
1869 | retries, | |
1870 | broadcast, | |
1871 | &ipmb_seq, | |
1872 | &seqid); | |
1873 | if (rv) { | |
c70d7499 CM |
1874 | /* |
1875 | * We have used up all the sequence numbers, | |
1876 | * probably, so abort. | |
1877 | */ | |
1da177e4 LT |
1878 | spin_unlock_irqrestore(&(intf->seq_lock), |
1879 | flags); | |
1880 | goto out_err; | |
1881 | } | |
1882 | ||
25176ed6 CM |
1883 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1884 | ||
c70d7499 CM |
1885 | /* |
1886 | * Store the sequence number in the message, | |
1887 | * so that when the send message response | |
1888 | * comes back we can start the timer. | |
1889 | */ | |
1da177e4 LT |
1890 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1891 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1892 | ipmb_seq, broadcast, | |
1893 | source_address, source_lun); | |
1894 | ||
c70d7499 CM |
1895 | /* |
1896 | * Copy the message into the recv message data, so we | |
1897 | * can retransmit it later if necessary. | |
1898 | */ | |
1da177e4 LT |
1899 | memcpy(recv_msg->msg_data, smi_msg->data, |
1900 | smi_msg->data_size); | |
1901 | recv_msg->msg.data = recv_msg->msg_data; | |
1902 | recv_msg->msg.data_len = smi_msg->data_size; | |
1903 | ||
c70d7499 CM |
1904 | /* |
1905 | * We don't unlock until here, because we need | |
1906 | * to copy the completed message into the | |
1907 | * recv_msg before we release the lock. | |
1908 | * Otherwise, race conditions may bite us. I | |
1909 | * know that's pretty paranoid, but I prefer | |
1910 | * to be correct. | |
1911 | */ | |
1da177e4 LT |
1912 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1913 | } | |
25176ed6 | 1914 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1915 | struct ipmi_lan_addr *lan_addr; |
1916 | unsigned char ipmb_seq; | |
1917 | long seqid; | |
31b0b073 | 1918 | struct ipmi_channel *chans; |
1da177e4 | 1919 | |
12fc1d7b | 1920 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1921 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1922 | rv = -EINVAL; |
1923 | goto out_err; | |
1924 | } | |
1925 | ||
31b0b073 CM |
1926 | chans = READ_ONCE(intf->channel_list)->c; |
1927 | ||
1928 | if ((chans[addr->channel].medium | |
c70d7499 | 1929 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
31b0b073 | 1930 | && (chans[addr->channel].medium |
c70d7499 | 1931 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1932 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1933 | rv = -EINVAL; |
1934 | goto out_err; | |
1935 | } | |
1936 | ||
1937 | retries = 4; | |
1938 | ||
1939 | /* Default to 1 second retries. */ | |
1940 | if (retry_time_ms == 0) | |
1941 | retry_time_ms = 1000; | |
1942 | ||
1943 | /* 11 for the header and 1 for the checksum. */ | |
1944 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1945 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1946 | rv = -EMSGSIZE; |
1947 | goto out_err; | |
1948 | } | |
1949 | ||
1950 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1951 | if (lan_addr->lun > 3) { | |
b2655f26 | 1952 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1953 | rv = -EINVAL; |
1954 | goto out_err; | |
1955 | } | |
1956 | ||
1957 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1958 | ||
1959 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1960 | /* |
1961 | * It's a response, so use the user's sequence | |
1962 | * from msgid. | |
1963 | */ | |
b2655f26 | 1964 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1965 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1966 | msgid, source_lun); | |
1967 | ||
c70d7499 CM |
1968 | /* |
1969 | * Save the receive message so we can use it | |
1970 | * to deliver the response. | |
1971 | */ | |
1da177e4 LT |
1972 | smi_msg->user_data = recv_msg; |
1973 | } else { | |
1974 | /* It's a command, so get a sequence for it. */ | |
1975 | ||
1976 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1977 | ||
c70d7499 CM |
1978 | /* |
1979 | * Create a sequence number with a 1 second | |
1980 | * timeout and 4 retries. | |
1981 | */ | |
1da177e4 LT |
1982 | rv = intf_next_seq(intf, |
1983 | recv_msg, | |
1984 | retry_time_ms, | |
1985 | retries, | |
1986 | 0, | |
1987 | &ipmb_seq, | |
1988 | &seqid); | |
1989 | if (rv) { | |
c70d7499 CM |
1990 | /* |
1991 | * We have used up all the sequence numbers, | |
1992 | * probably, so abort. | |
1993 | */ | |
1da177e4 LT |
1994 | spin_unlock_irqrestore(&(intf->seq_lock), |
1995 | flags); | |
1996 | goto out_err; | |
1997 | } | |
1998 | ||
25176ed6 CM |
1999 | ipmi_inc_stat(intf, sent_lan_commands); |
2000 | ||
c70d7499 CM |
2001 | /* |
2002 | * Store the sequence number in the message, | |
2003 | * so that when the send message response | |
2004 | * comes back we can start the timer. | |
2005 | */ | |
1da177e4 LT |
2006 | format_lan_msg(smi_msg, msg, lan_addr, |
2007 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
2008 | ipmb_seq, source_lun); | |
2009 | ||
c70d7499 CM |
2010 | /* |
2011 | * Copy the message into the recv message data, so we | |
2012 | * can retransmit it later if necessary. | |
2013 | */ | |
1da177e4 LT |
2014 | memcpy(recv_msg->msg_data, smi_msg->data, |
2015 | smi_msg->data_size); | |
2016 | recv_msg->msg.data = recv_msg->msg_data; | |
2017 | recv_msg->msg.data_len = smi_msg->data_size; | |
2018 | ||
c70d7499 CM |
2019 | /* |
2020 | * We don't unlock until here, because we need | |
2021 | * to copy the completed message into the | |
2022 | * recv_msg before we release the lock. | |
2023 | * Otherwise, race conditions may bite us. I | |
2024 | * know that's pretty paranoid, but I prefer | |
2025 | * to be correct. | |
2026 | */ | |
1da177e4 LT |
2027 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
2028 | } | |
2029 | } else { | |
2030 | /* Unknown address type. */ | |
b2655f26 | 2031 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
2032 | rv = -EINVAL; |
2033 | goto out_err; | |
2034 | } | |
2035 | ||
2036 | #ifdef DEBUG_MSGING | |
2037 | { | |
2038 | int m; | |
e8b33617 | 2039 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
2040 | printk(" %2.2x", smi_msg->data[m]); |
2041 | printk("\n"); | |
2042 | } | |
2043 | #endif | |
b2c03941 | 2044 | |
7ea0ed2b | 2045 | smi_send(intf, intf->handlers, smi_msg, priority); |
b2c03941 | 2046 | rcu_read_unlock(); |
1da177e4 LT |
2047 | |
2048 | return 0; | |
2049 | ||
2050 | out_err: | |
b2c03941 | 2051 | rcu_read_unlock(); |
1da177e4 LT |
2052 | ipmi_free_smi_msg(smi_msg); |
2053 | ipmi_free_recv_msg(recv_msg); | |
2054 | return rv; | |
2055 | } | |
2056 | ||
c14979b9 CM |
2057 | static int check_addr(ipmi_smi_t intf, |
2058 | struct ipmi_addr *addr, | |
2059 | unsigned char *saddr, | |
2060 | unsigned char *lun) | |
2061 | { | |
2062 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
2063 | return -EINVAL; | |
5fdb1fb2 CM |
2064 | *lun = intf->addrinfo[addr->channel].lun; |
2065 | *saddr = intf->addrinfo[addr->channel].address; | |
c14979b9 CM |
2066 | return 0; |
2067 | } | |
2068 | ||
1da177e4 LT |
2069 | int ipmi_request_settime(ipmi_user_t user, |
2070 | struct ipmi_addr *addr, | |
2071 | long msgid, | |
2072 | struct kernel_ipmi_msg *msg, | |
2073 | void *user_msg_data, | |
2074 | int priority, | |
2075 | int retries, | |
2076 | unsigned int retry_time_ms) | |
2077 | { | |
f0ba9390 | 2078 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2079 | int rv; |
2080 | ||
8a3628d5 | 2081 | if (!user) |
56a55ec6 | 2082 | return -EINVAL; |
c14979b9 CM |
2083 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2084 | if (rv) | |
2085 | return rv; | |
1da177e4 LT |
2086 | return i_ipmi_request(user, |
2087 | user->intf, | |
2088 | addr, | |
2089 | msgid, | |
2090 | msg, | |
2091 | user_msg_data, | |
2092 | NULL, NULL, | |
2093 | priority, | |
c14979b9 CM |
2094 | saddr, |
2095 | lun, | |
1da177e4 LT |
2096 | retries, |
2097 | retry_time_ms); | |
2098 | } | |
c70d7499 | 2099 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
2100 | |
2101 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
2102 | struct ipmi_addr *addr, | |
2103 | long msgid, | |
2104 | struct kernel_ipmi_msg *msg, | |
2105 | void *user_msg_data, | |
2106 | void *supplied_smi, | |
2107 | struct ipmi_recv_msg *supplied_recv, | |
2108 | int priority) | |
2109 | { | |
9ebca93b | 2110 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
2111 | int rv; |
2112 | ||
8a3628d5 | 2113 | if (!user) |
56a55ec6 | 2114 | return -EINVAL; |
c14979b9 CM |
2115 | rv = check_addr(user->intf, addr, &saddr, &lun); |
2116 | if (rv) | |
2117 | return rv; | |
1da177e4 LT |
2118 | return i_ipmi_request(user, |
2119 | user->intf, | |
2120 | addr, | |
2121 | msgid, | |
2122 | msg, | |
2123 | user_msg_data, | |
2124 | supplied_smi, | |
2125 | supplied_recv, | |
2126 | priority, | |
c14979b9 CM |
2127 | saddr, |
2128 | lun, | |
1da177e4 LT |
2129 | -1, 0); |
2130 | } | |
c70d7499 | 2131 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 2132 | |
aa9c9ab2 JK |
2133 | static void bmc_device_id_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
2134 | { | |
2135 | int rv; | |
2136 | ||
2137 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2138 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2139 | || (msg->msg.cmd != IPMI_GET_DEVICE_ID_CMD)) { | |
106a8461 CM |
2140 | dev_warn(intf->si_dev, |
2141 | PFX "invalid device_id msg: addr_type=%d netfn=%x cmd=%x\n", | |
aa9c9ab2 JK |
2142 | msg->addr.addr_type, msg->msg.netfn, msg->msg.cmd); |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | rv = ipmi_demangle_device_id(msg->msg.netfn, msg->msg.cmd, | |
2147 | msg->msg.data, msg->msg.data_len, &intf->bmc->fetch_id); | |
2148 | if (rv) { | |
106a8461 CM |
2149 | dev_warn(intf->si_dev, |
2150 | PFX "device id demangle failed: %d\n", rv); | |
aa9c9ab2 JK |
2151 | intf->bmc->dyn_id_set = 0; |
2152 | } else { | |
2153 | /* | |
2154 | * Make sure the id data is available before setting | |
2155 | * dyn_id_set. | |
2156 | */ | |
2157 | smp_wmb(); | |
2158 | intf->bmc->dyn_id_set = 1; | |
2159 | } | |
2160 | ||
2161 | wake_up(&intf->waitq); | |
2162 | } | |
2163 | ||
2164 | static int | |
2165 | send_get_device_id_cmd(ipmi_smi_t intf) | |
2166 | { | |
2167 | struct ipmi_system_interface_addr si; | |
2168 | struct kernel_ipmi_msg msg; | |
2169 | ||
2170 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2171 | si.channel = IPMI_BMC_CHANNEL; | |
2172 | si.lun = 0; | |
2173 | ||
2174 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2175 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
2176 | msg.data = NULL; | |
2177 | msg.data_len = 0; | |
2178 | ||
2179 | return i_ipmi_request(NULL, | |
2180 | intf, | |
2181 | (struct ipmi_addr *) &si, | |
2182 | 0, | |
2183 | &msg, | |
2184 | intf, | |
2185 | NULL, | |
2186 | NULL, | |
2187 | 0, | |
5fdb1fb2 CM |
2188 | intf->addrinfo[0].address, |
2189 | intf->addrinfo[0].lun, | |
aa9c9ab2 JK |
2190 | -1, 0); |
2191 | } | |
2192 | ||
2193 | static int __get_device_id(ipmi_smi_t intf, struct bmc_device *bmc) | |
2194 | { | |
2195 | int rv; | |
2196 | ||
2197 | bmc->dyn_id_set = 2; | |
2198 | ||
2199 | intf->null_user_handler = bmc_device_id_handler; | |
2200 | ||
2201 | rv = send_get_device_id_cmd(intf); | |
2202 | if (rv) | |
2203 | return rv; | |
2204 | ||
2205 | wait_event(intf->waitq, bmc->dyn_id_set != 2); | |
2206 | ||
2207 | if (!bmc->dyn_id_set) | |
2208 | rv = -EIO; /* Something went wrong in the fetch. */ | |
2209 | ||
2210 | /* dyn_id_set makes the id data available. */ | |
2211 | smp_rmb(); | |
2212 | ||
2213 | intf->null_user_handler = NULL; | |
2214 | ||
2215 | return rv; | |
2216 | } | |
2217 | ||
2218 | /* | |
2219 | * Fetch the device id for the bmc/interface. You must pass in either | |
2220 | * bmc or intf, this code will get the other one. If the data has | |
2221 | * been recently fetched, this will just use the cached data. Otherwise | |
2222 | * it will run a new fetch. | |
2223 | * | |
2224 | * Except for the first time this is called (in ipmi_register_smi()), | |
2225 | * this will always return good data; | |
2226 | */ | |
b2cfd8ab CM |
2227 | static int __bmc_get_device_id(ipmi_smi_t intf, struct bmc_device *bmc, |
2228 | struct ipmi_device_id *id, | |
3fd32f9e | 2229 | bool *guid_set, guid_t *guid, int intf_num) |
511d57dc | 2230 | { |
aa9c9ab2 | 2231 | int rv = 0; |
28f26ac7 | 2232 | int prev_dyn_id_set, prev_guid_set; |
b2cfd8ab | 2233 | bool intf_set = intf != NULL; |
aa9c9ab2 JK |
2234 | |
2235 | if (!intf) { | |
2236 | mutex_lock(&bmc->dyn_mutex); | |
2237 | retry_bmc_lock: | |
2238 | if (list_empty(&bmc->intfs)) { | |
2239 | mutex_unlock(&bmc->dyn_mutex); | |
2240 | return -ENOENT; | |
2241 | } | |
2242 | intf = list_first_entry(&bmc->intfs, struct ipmi_smi, | |
2243 | bmc_link); | |
2244 | kref_get(&intf->refcount); | |
2245 | mutex_unlock(&bmc->dyn_mutex); | |
2246 | mutex_lock(&intf->bmc_reg_mutex); | |
2247 | mutex_lock(&bmc->dyn_mutex); | |
2248 | if (intf != list_first_entry(&bmc->intfs, struct ipmi_smi, | |
2249 | bmc_link)) { | |
2250 | mutex_unlock(&intf->bmc_reg_mutex); | |
2251 | kref_put(&intf->refcount, intf_free); | |
2252 | goto retry_bmc_lock; | |
2253 | } | |
2254 | } else { | |
2255 | mutex_lock(&intf->bmc_reg_mutex); | |
511d57dc | 2256 | bmc = intf->bmc; |
aa9c9ab2 JK |
2257 | mutex_lock(&bmc->dyn_mutex); |
2258 | kref_get(&intf->refcount); | |
2259 | } | |
511d57dc | 2260 | |
aa9c9ab2 | 2261 | /* If we have a valid and current ID, just return that. */ |
b2cfd8ab CM |
2262 | if (intf->in_bmc_register || |
2263 | (bmc->dyn_id_set && time_is_after_jiffies(bmc->dyn_id_expiry))) | |
2264 | goto out_noprocessing; | |
aa9c9ab2 | 2265 | |
28f26ac7 CM |
2266 | prev_guid_set = bmc->dyn_guid_set; |
2267 | __get_guid(intf); | |
2268 | ||
28f26ac7 | 2269 | prev_dyn_id_set = bmc->dyn_id_set; |
aa9c9ab2 JK |
2270 | rv = __get_device_id(intf, bmc); |
2271 | if (rv) | |
2272 | goto out; | |
2273 | ||
b2cfd8ab CM |
2274 | /* |
2275 | * The guid, device id, manufacturer id, and product id should | |
2276 | * not change on a BMC. If it does we have to do some dancing. | |
2277 | */ | |
2278 | if (!intf->bmc_registered | |
2279 | || (!prev_guid_set && bmc->dyn_guid_set) | |
2280 | || (!prev_dyn_id_set && bmc->dyn_id_set) | |
2281 | || (prev_guid_set && bmc->dyn_guid_set | |
3fd32f9e | 2282 | && !guid_equal(&bmc->guid, &bmc->fetch_guid)) |
b2cfd8ab CM |
2283 | || bmc->id.device_id != bmc->fetch_id.device_id |
2284 | || bmc->id.manufacturer_id != bmc->fetch_id.manufacturer_id | |
2285 | || bmc->id.product_id != bmc->fetch_id.product_id) { | |
2286 | struct ipmi_device_id id = bmc->fetch_id; | |
2287 | int guid_set = bmc->dyn_guid_set; | |
3fd32f9e | 2288 | guid_t guid; |
b2cfd8ab | 2289 | |
3fd32f9e | 2290 | guid = bmc->fetch_guid; |
b2cfd8ab CM |
2291 | mutex_unlock(&bmc->dyn_mutex); |
2292 | ||
2293 | __ipmi_bmc_unregister(intf); | |
2294 | /* Fill in the temporary BMC for good measure. */ | |
2295 | intf->bmc->id = id; | |
2296 | intf->bmc->dyn_guid_set = guid_set; | |
3fd32f9e CM |
2297 | intf->bmc->guid = guid; |
2298 | if (__ipmi_bmc_register(intf, &id, guid_set, &guid, intf_num)) | |
c0734bd5 | 2299 | need_waiter(intf); /* Retry later on an error. */ |
31b0b073 CM |
2300 | else |
2301 | __scan_channels(intf, &id); | |
2302 | ||
b2cfd8ab CM |
2303 | |
2304 | if (!intf_set) { | |
2305 | /* | |
2306 | * We weren't given the interface on the | |
2307 | * command line, so restart the operation on | |
2308 | * the next interface for the BMC. | |
2309 | */ | |
2310 | mutex_unlock(&intf->bmc_reg_mutex); | |
2311 | mutex_lock(&bmc->dyn_mutex); | |
2312 | goto retry_bmc_lock; | |
2313 | } | |
2314 | ||
2315 | /* We have a new BMC, set it up. */ | |
2316 | bmc = intf->bmc; | |
2317 | mutex_lock(&bmc->dyn_mutex); | |
2318 | goto out_noprocessing; | |
31b0b073 CM |
2319 | } else if (memcmp(&bmc->fetch_id, &bmc->id, sizeof(bmc->id))) |
2320 | /* Version info changes, scan the channels again. */ | |
2321 | __scan_channels(intf, &bmc->fetch_id); | |
aa9c9ab2 JK |
2322 | |
2323 | bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY; | |
2324 | ||
2325 | out: | |
2326 | if (rv && prev_dyn_id_set) { | |
2327 | rv = 0; /* Ignore failures if we have previous data. */ | |
2328 | bmc->dyn_id_set = prev_dyn_id_set; | |
2329 | } | |
b2cfd8ab CM |
2330 | if (!rv) { |
2331 | bmc->id = bmc->fetch_id; | |
2332 | if (bmc->dyn_guid_set) | |
3fd32f9e | 2333 | bmc->guid = bmc->fetch_guid; |
b2cfd8ab CM |
2334 | else if (prev_guid_set) |
2335 | /* | |
2336 | * The guid used to be valid and it failed to fetch, | |
2337 | * just use the cached value. | |
2338 | */ | |
2339 | bmc->dyn_guid_set = prev_guid_set; | |
2340 | } | |
2341 | out_noprocessing: | |
2342 | if (!rv) { | |
2343 | if (id) | |
2344 | *id = bmc->id; | |
aa9c9ab2 | 2345 | |
b2cfd8ab CM |
2346 | if (guid_set) |
2347 | *guid_set = bmc->dyn_guid_set; | |
39d3fb45 | 2348 | |
b2cfd8ab | 2349 | if (guid && bmc->dyn_guid_set) |
3fd32f9e | 2350 | *guid = bmc->guid; |
b2cfd8ab | 2351 | } |
39d3fb45 | 2352 | |
aa9c9ab2 JK |
2353 | mutex_unlock(&bmc->dyn_mutex); |
2354 | mutex_unlock(&intf->bmc_reg_mutex); | |
2355 | ||
2356 | kref_put(&intf->refcount, intf_free); | |
2357 | return rv; | |
511d57dc CM |
2358 | } |
2359 | ||
b2cfd8ab CM |
2360 | static int bmc_get_device_id(ipmi_smi_t intf, struct bmc_device *bmc, |
2361 | struct ipmi_device_id *id, | |
3fd32f9e | 2362 | bool *guid_set, guid_t *guid) |
b2cfd8ab CM |
2363 | { |
2364 | return __bmc_get_device_id(intf, bmc, id, guid_set, guid, -1); | |
2365 | } | |
2366 | ||
55f91cb6 | 2367 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
07412736 | 2368 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2369 | { |
07412736 | 2370 | ipmi_smi_t intf = m->private; |
c14979b9 | 2371 | int i; |
1da177e4 | 2372 | |
5fdb1fb2 | 2373 | seq_printf(m, "%x", intf->addrinfo[0].address); |
07412736 | 2374 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) |
5fdb1fb2 | 2375 | seq_printf(m, " %x", intf->addrinfo[i].address); |
d6c5dc18 JP |
2376 | seq_putc(m, '\n'); |
2377 | ||
5e33cd0c | 2378 | return 0; |
1da177e4 LT |
2379 | } |
2380 | ||
07412736 | 2381 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2382 | { |
d9dda78b | 2383 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 2384 | } |
1da177e4 | 2385 | |
07412736 AD |
2386 | static const struct file_operations smi_ipmb_proc_ops = { |
2387 | .open = smi_ipmb_proc_open, | |
2388 | .read = seq_read, | |
2389 | .llseek = seq_lseek, | |
2390 | .release = single_release, | |
2391 | }; | |
2392 | ||
2393 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
2394 | { | |
2395 | ipmi_smi_t intf = m->private; | |
511d57dc CM |
2396 | struct ipmi_device_id id; |
2397 | int rv; | |
2398 | ||
39d3fb45 | 2399 | rv = bmc_get_device_id(intf, NULL, &id, NULL, NULL); |
511d57dc CM |
2400 | if (rv) |
2401 | return rv; | |
07412736 | 2402 | |
d6c5dc18 | 2403 | seq_printf(m, "%u.%u\n", |
511d57dc CM |
2404 | ipmi_version_major(&id), |
2405 | ipmi_version_minor(&id)); | |
d6c5dc18 | 2406 | |
5e33cd0c | 2407 | return 0; |
1da177e4 LT |
2408 | } |
2409 | ||
07412736 | 2410 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2411 | { |
d9dda78b | 2412 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
2413 | } |
2414 | ||
2415 | static const struct file_operations smi_version_proc_ops = { | |
2416 | .open = smi_version_proc_open, | |
2417 | .read = seq_read, | |
2418 | .llseek = seq_lseek, | |
2419 | .release = single_release, | |
2420 | }; | |
1da177e4 | 2421 | |
07412736 AD |
2422 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
2423 | { | |
2424 | ipmi_smi_t intf = m->private; | |
2425 | ||
2426 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 2427 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 2428 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 2429 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2430 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2431 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2432 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2433 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2434 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2435 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2436 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2437 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2438 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2439 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2440 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2441 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2442 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2443 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2444 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2445 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2446 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2447 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2448 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2449 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2450 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2451 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2452 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2453 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2454 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2455 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2456 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2457 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2458 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2459 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2460 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2461 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2462 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2463 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2464 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2465 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2466 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2467 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2468 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2469 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2470 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2471 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2472 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2473 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2474 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2475 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2476 | seq_printf(m, "events: %u\n", |
b2655f26 | 2477 | ipmi_get_stat(intf, events)); |
07412736 | 2478 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2479 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2480 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2481 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2482 | return 0; |
2483 | } | |
1da177e4 | 2484 | |
07412736 AD |
2485 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2486 | { | |
d9dda78b | 2487 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2488 | } |
07412736 AD |
2489 | |
2490 | static const struct file_operations smi_stats_proc_ops = { | |
2491 | .open = smi_stats_proc_open, | |
2492 | .read = seq_read, | |
2493 | .llseek = seq_lseek, | |
2494 | .release = single_release, | |
2495 | }; | |
1da177e4 LT |
2496 | |
2497 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2498 | const struct file_operations *proc_ops, |
99b76233 | 2499 | void *data) |
1da177e4 | 2500 | { |
1da177e4 | 2501 | int rv = 0; |
3b625943 | 2502 | struct proc_dir_entry *file; |
1da177e4 LT |
2503 | struct ipmi_proc_entry *entry; |
2504 | ||
2505 | /* Create a list element. */ | |
2506 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2507 | if (!entry) | |
2508 | return -ENOMEM; | |
1b6b698f | 2509 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2510 | if (!entry->name) { |
2511 | kfree(entry); | |
2512 | return -ENOMEM; | |
2513 | } | |
1da177e4 | 2514 | |
07412736 | 2515 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2516 | if (!file) { |
2517 | kfree(entry->name); | |
2518 | kfree(entry); | |
2519 | rv = -ENOMEM; | |
2520 | } else { | |
ac019151 | 2521 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2522 | /* Stick it on the list. */ |
2523 | entry->next = smi->proc_entries; | |
2524 | smi->proc_entries = entry; | |
ac019151 | 2525 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 LT |
2526 | } |
2527 | ||
2528 | return rv; | |
2529 | } | |
c70d7499 | 2530 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2531 | |
2532 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2533 | { | |
2534 | int rv = 0; | |
2535 | ||
2536 | sprintf(smi->proc_dir_name, "%d", num); | |
2537 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2538 | if (!smi->proc_dir) | |
2539 | rv = -ENOMEM; | |
1da177e4 LT |
2540 | |
2541 | if (rv == 0) | |
2542 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2543 | &smi_stats_proc_ops, |
99b76233 | 2544 | smi); |
1da177e4 LT |
2545 | |
2546 | if (rv == 0) | |
2547 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2548 | &smi_ipmb_proc_ops, |
99b76233 | 2549 | smi); |
1da177e4 LT |
2550 | |
2551 | if (rv == 0) | |
2552 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2553 | &smi_version_proc_ops, |
99b76233 | 2554 | smi); |
1da177e4 LT |
2555 | |
2556 | return rv; | |
2557 | } | |
2558 | ||
2559 | static void remove_proc_entries(ipmi_smi_t smi) | |
2560 | { | |
2561 | struct ipmi_proc_entry *entry; | |
2562 | ||
ac019151 | 2563 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2564 | while (smi->proc_entries) { |
2565 | entry = smi->proc_entries; | |
2566 | smi->proc_entries = entry->next; | |
2567 | ||
2568 | remove_proc_entry(entry->name, smi->proc_dir); | |
2569 | kfree(entry->name); | |
2570 | kfree(entry); | |
2571 | } | |
ac019151 | 2572 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 LT |
2573 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
2574 | } | |
55f91cb6 | 2575 | #endif /* CONFIG_IPMI_PROC_INTERFACE */ |
1da177e4 | 2576 | |
50c812b2 CM |
2577 | static ssize_t device_id_show(struct device *dev, |
2578 | struct device_attribute *attr, | |
2579 | char *buf) | |
2580 | { | |
16639eb0 | 2581 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2582 | struct ipmi_device_id id; |
2583 | int rv; | |
2584 | ||
39d3fb45 | 2585 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2586 | if (rv) |
2587 | return rv; | |
50c812b2 | 2588 | |
511d57dc | 2589 | return snprintf(buf, 10, "%u\n", id.device_id); |
50c812b2 | 2590 | } |
9c633317 | 2591 | static DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL); |
50c812b2 | 2592 | |
16639eb0 CM |
2593 | static ssize_t provides_device_sdrs_show(struct device *dev, |
2594 | struct device_attribute *attr, | |
2595 | char *buf) | |
50c812b2 | 2596 | { |
16639eb0 | 2597 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2598 | struct ipmi_device_id id; |
2599 | int rv; | |
50c812b2 | 2600 | |
39d3fb45 | 2601 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2602 | if (rv) |
2603 | return rv; | |
2604 | ||
2605 | return snprintf(buf, 10, "%u\n", (id.device_revision & 0x80) >> 7); | |
50c812b2 | 2606 | } |
9c633317 CM |
2607 | static DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, |
2608 | NULL); | |
50c812b2 CM |
2609 | |
2610 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2611 | char *buf) | |
2612 | { | |
16639eb0 | 2613 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2614 | struct ipmi_device_id id; |
2615 | int rv; | |
50c812b2 | 2616 | |
39d3fb45 | 2617 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2618 | if (rv) |
2619 | return rv; | |
2620 | ||
2621 | return snprintf(buf, 20, "%u\n", id.device_revision & 0x0F); | |
50c812b2 | 2622 | } |
9c633317 | 2623 | static DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL); |
50c812b2 | 2624 | |
16639eb0 CM |
2625 | static ssize_t firmware_revision_show(struct device *dev, |
2626 | struct device_attribute *attr, | |
2627 | char *buf) | |
50c812b2 | 2628 | { |
16639eb0 | 2629 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2630 | struct ipmi_device_id id; |
2631 | int rv; | |
50c812b2 | 2632 | |
39d3fb45 | 2633 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2634 | if (rv) |
2635 | return rv; | |
2636 | ||
2637 | return snprintf(buf, 20, "%u.%x\n", id.firmware_revision_1, | |
2638 | id.firmware_revision_2); | |
50c812b2 | 2639 | } |
9c633317 | 2640 | static DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL); |
50c812b2 CM |
2641 | |
2642 | static ssize_t ipmi_version_show(struct device *dev, | |
2643 | struct device_attribute *attr, | |
2644 | char *buf) | |
2645 | { | |
16639eb0 | 2646 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2647 | struct ipmi_device_id id; |
2648 | int rv; | |
2649 | ||
39d3fb45 | 2650 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2651 | if (rv) |
2652 | return rv; | |
50c812b2 CM |
2653 | |
2654 | return snprintf(buf, 20, "%u.%u\n", | |
511d57dc CM |
2655 | ipmi_version_major(&id), |
2656 | ipmi_version_minor(&id)); | |
50c812b2 | 2657 | } |
9c633317 | 2658 | static DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL); |
50c812b2 CM |
2659 | |
2660 | static ssize_t add_dev_support_show(struct device *dev, | |
2661 | struct device_attribute *attr, | |
2662 | char *buf) | |
2663 | { | |
16639eb0 | 2664 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2665 | struct ipmi_device_id id; |
2666 | int rv; | |
50c812b2 | 2667 | |
39d3fb45 | 2668 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2669 | if (rv) |
2670 | return rv; | |
2671 | ||
2672 | return snprintf(buf, 10, "0x%02x\n", id.additional_device_support); | |
50c812b2 | 2673 | } |
9c633317 CM |
2674 | static DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, |
2675 | NULL); | |
50c812b2 CM |
2676 | |
2677 | static ssize_t manufacturer_id_show(struct device *dev, | |
2678 | struct device_attribute *attr, | |
2679 | char *buf) | |
2680 | { | |
16639eb0 | 2681 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2682 | struct ipmi_device_id id; |
2683 | int rv; | |
2684 | ||
39d3fb45 | 2685 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2686 | if (rv) |
2687 | return rv; | |
50c812b2 | 2688 | |
511d57dc | 2689 | return snprintf(buf, 20, "0x%6.6x\n", id.manufacturer_id); |
50c812b2 | 2690 | } |
9c633317 | 2691 | static DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL); |
50c812b2 CM |
2692 | |
2693 | static ssize_t product_id_show(struct device *dev, | |
2694 | struct device_attribute *attr, | |
2695 | char *buf) | |
2696 | { | |
16639eb0 | 2697 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2698 | struct ipmi_device_id id; |
2699 | int rv; | |
2700 | ||
39d3fb45 | 2701 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2702 | if (rv) |
2703 | return rv; | |
50c812b2 | 2704 | |
511d57dc | 2705 | return snprintf(buf, 10, "0x%4.4x\n", id.product_id); |
50c812b2 | 2706 | } |
9c633317 | 2707 | static DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL); |
50c812b2 CM |
2708 | |
2709 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2710 | struct device_attribute *attr, | |
2711 | char *buf) | |
2712 | { | |
16639eb0 | 2713 | struct bmc_device *bmc = to_bmc_device(dev); |
511d57dc CM |
2714 | struct ipmi_device_id id; |
2715 | int rv; | |
2716 | ||
39d3fb45 | 2717 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); |
511d57dc CM |
2718 | if (rv) |
2719 | return rv; | |
50c812b2 CM |
2720 | |
2721 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
511d57dc CM |
2722 | id.aux_firmware_revision[3], |
2723 | id.aux_firmware_revision[2], | |
2724 | id.aux_firmware_revision[1], | |
2725 | id.aux_firmware_revision[0]); | |
50c812b2 | 2726 | } |
9c633317 | 2727 | static DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL); |
50c812b2 CM |
2728 | |
2729 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2730 | char *buf) | |
2731 | { | |
16639eb0 | 2732 | struct bmc_device *bmc = to_bmc_device(dev); |
39d3fb45 | 2733 | bool guid_set; |
3fd32f9e | 2734 | guid_t guid; |
39d3fb45 CM |
2735 | int rv; |
2736 | ||
3fd32f9e | 2737 | rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, &guid); |
39d3fb45 CM |
2738 | if (rv) |
2739 | return rv; | |
2740 | if (!guid_set) | |
2741 | return -ENOENT; | |
50c812b2 | 2742 | |
3fd32f9e | 2743 | return snprintf(buf, 38, "%pUl\n", guid.b); |
50c812b2 | 2744 | } |
9c633317 | 2745 | static DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL); |
16639eb0 CM |
2746 | |
2747 | static struct attribute *bmc_dev_attrs[] = { | |
2748 | &dev_attr_device_id.attr, | |
2749 | &dev_attr_provides_device_sdrs.attr, | |
2750 | &dev_attr_revision.attr, | |
2751 | &dev_attr_firmware_revision.attr, | |
2752 | &dev_attr_ipmi_version.attr, | |
2753 | &dev_attr_additional_device_support.attr, | |
2754 | &dev_attr_manufacturer_id.attr, | |
2755 | &dev_attr_product_id.attr, | |
2d06a0c9 TI |
2756 | &dev_attr_aux_firmware_revision.attr, |
2757 | &dev_attr_guid.attr, | |
16639eb0 CM |
2758 | NULL |
2759 | }; | |
50c812b2 | 2760 | |
2d06a0c9 TI |
2761 | static umode_t bmc_dev_attr_is_visible(struct kobject *kobj, |
2762 | struct attribute *attr, int idx) | |
2763 | { | |
2764 | struct device *dev = kobj_to_dev(kobj); | |
2765 | struct bmc_device *bmc = to_bmc_device(dev); | |
2766 | umode_t mode = attr->mode; | |
511d57dc | 2767 | int rv; |
2d06a0c9 | 2768 | |
511d57dc | 2769 | if (attr == &dev_attr_aux_firmware_revision.attr) { |
39d3fb45 CM |
2770 | struct ipmi_device_id id; |
2771 | ||
2772 | rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL); | |
511d57dc CM |
2773 | return (!rv && id.aux_firmware_revision_set) ? mode : 0; |
2774 | } | |
39d3fb45 CM |
2775 | if (attr == &dev_attr_guid.attr) { |
2776 | bool guid_set; | |
2777 | ||
2778 | rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, NULL); | |
2779 | return (!rv && guid_set) ? mode : 0; | |
2780 | } | |
2d06a0c9 TI |
2781 | return mode; |
2782 | } | |
2783 | ||
1e7a75f7 | 2784 | static const struct attribute_group bmc_dev_attr_group = { |
16639eb0 | 2785 | .attrs = bmc_dev_attrs, |
2d06a0c9 | 2786 | .is_visible = bmc_dev_attr_is_visible, |
16639eb0 | 2787 | }; |
5e59393e | 2788 | |
16639eb0 CM |
2789 | static const struct attribute_group *bmc_dev_attr_groups[] = { |
2790 | &bmc_dev_attr_group, | |
2791 | NULL | |
2792 | }; | |
2793 | ||
1e7a75f7 | 2794 | static const struct device_type bmc_device_type = { |
16639eb0 CM |
2795 | .groups = bmc_dev_attr_groups, |
2796 | }; | |
2797 | ||
f33e4df8 CM |
2798 | static int __find_bmc_guid(struct device *dev, void *data) |
2799 | { | |
3fd32f9e | 2800 | guid_t *guid = data; |
39d3fb45 | 2801 | struct bmc_device *bmc; |
39d3fb45 | 2802 | int rv; |
f33e4df8 | 2803 | |
eae4a36a CM |
2804 | if (dev->type != &bmc_device_type) |
2805 | return 0; | |
2806 | ||
39d3fb45 | 2807 | bmc = to_bmc_device(dev); |
3fd32f9e | 2808 | rv = bmc->dyn_guid_set && guid_equal(&bmc->guid, guid); |
b2cfd8ab CM |
2809 | if (rv) |
2810 | rv = kref_get_unless_zero(&bmc->usecount); | |
2811 | return rv; | |
f33e4df8 CM |
2812 | } |
2813 | ||
9ca15af3 | 2814 | /* |
b2cfd8ab | 2815 | * Returns with the bmc's usecount incremented, if it is non-NULL. |
9ca15af3 | 2816 | */ |
f33e4df8 | 2817 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, |
3fd32f9e | 2818 | guid_t *guid) |
f33e4df8 CM |
2819 | { |
2820 | struct device *dev; | |
9ca15af3 | 2821 | struct bmc_device *bmc = NULL; |
f33e4df8 CM |
2822 | |
2823 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
9ca15af3 CM |
2824 | if (dev) { |
2825 | bmc = to_bmc_device(dev); | |
9ca15af3 CM |
2826 | put_device(dev); |
2827 | } | |
2828 | return bmc; | |
f33e4df8 CM |
2829 | } |
2830 | ||
2831 | struct prod_dev_id { | |
2832 | unsigned int product_id; | |
2833 | unsigned char device_id; | |
2834 | }; | |
2835 | ||
2836 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2837 | { | |
39d3fb45 | 2838 | struct prod_dev_id *cid = data; |
eae4a36a | 2839 | struct bmc_device *bmc; |
39d3fb45 | 2840 | int rv; |
eae4a36a CM |
2841 | |
2842 | if (dev->type != &bmc_device_type) | |
2843 | return 0; | |
f33e4df8 | 2844 | |
eae4a36a | 2845 | bmc = to_bmc_device(dev); |
b2cfd8ab CM |
2846 | rv = (bmc->id.product_id == cid->product_id |
2847 | && bmc->id.device_id == cid->device_id); | |
39d3fb45 | 2848 | if (rv) |
b2cfd8ab CM |
2849 | rv = kref_get_unless_zero(&bmc->usecount); |
2850 | return rv; | |
f33e4df8 CM |
2851 | } |
2852 | ||
9ca15af3 | 2853 | /* |
b2cfd8ab | 2854 | * Returns with the bmc's usecount incremented, if it is non-NULL. |
9ca15af3 | 2855 | */ |
f33e4df8 CM |
2856 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( |
2857 | struct device_driver *drv, | |
2858 | unsigned int product_id, unsigned char device_id) | |
2859 | { | |
2860 | struct prod_dev_id id = { | |
2861 | .product_id = product_id, | |
2862 | .device_id = device_id, | |
2863 | }; | |
2864 | struct device *dev; | |
9ca15af3 | 2865 | struct bmc_device *bmc = NULL; |
f33e4df8 CM |
2866 | |
2867 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
9ca15af3 CM |
2868 | if (dev) { |
2869 | bmc = to_bmc_device(dev); | |
9ca15af3 CM |
2870 | put_device(dev); |
2871 | } | |
2872 | return bmc; | |
f33e4df8 CM |
2873 | } |
2874 | ||
68e7e50f CM |
2875 | static DEFINE_IDA(ipmi_bmc_ida); |
2876 | ||
16639eb0 CM |
2877 | static void |
2878 | release_bmc_device(struct device *dev) | |
2879 | { | |
2880 | kfree(to_bmc_device(dev)); | |
5e59393e JG |
2881 | } |
2882 | ||
b2cfd8ab | 2883 | static void cleanup_bmc_work(struct work_struct *work) |
5e59393e | 2884 | { |
b2cfd8ab CM |
2885 | struct bmc_device *bmc = container_of(work, struct bmc_device, |
2886 | remove_work); | |
68e7e50f | 2887 | int id = bmc->pdev.id; /* Unregister overwrites id */ |
5e59393e | 2888 | |
16639eb0 | 2889 | platform_device_unregister(&bmc->pdev); |
68e7e50f | 2890 | ida_simple_remove(&ipmi_bmc_ida, id); |
50c812b2 CM |
2891 | } |
2892 | ||
b2cfd8ab CM |
2893 | static void |
2894 | cleanup_bmc_device(struct kref *ref) | |
2895 | { | |
2896 | struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount); | |
2897 | ||
2898 | /* | |
2899 | * Remove the platform device in a work queue to avoid issues | |
2900 | * with removing the device attributes while reading a device | |
2901 | * attribute. | |
2902 | */ | |
2903 | schedule_work(&bmc->remove_work); | |
2904 | } | |
2905 | ||
2906 | /* | |
2907 | * Must be called with intf->bmc_reg_mutex held. | |
2908 | */ | |
2909 | static void __ipmi_bmc_unregister(ipmi_smi_t intf) | |
50c812b2 CM |
2910 | { |
2911 | struct bmc_device *bmc = intf->bmc; | |
2912 | ||
a2cb600f CM |
2913 | if (!intf->bmc_registered) |
2914 | return; | |
2915 | ||
5a0e10ec | 2916 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); |
a2cb600f CM |
2917 | sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name); |
2918 | kfree(intf->my_dev_name); | |
2919 | intf->my_dev_name = NULL; | |
50c812b2 | 2920 | |
aa9c9ab2 | 2921 | mutex_lock(&bmc->dyn_mutex); |
a9137c3d | 2922 | list_del(&intf->bmc_link); |
aa9c9ab2 | 2923 | mutex_unlock(&bmc->dyn_mutex); |
c659ff34 | 2924 | intf->bmc = &intf->tmp_bmc; |
16639eb0 | 2925 | kref_put(&bmc->usecount, cleanup_bmc_device); |
a2cb600f | 2926 | intf->bmc_registered = false; |
b2cfd8ab | 2927 | } |
aa9c9ab2 | 2928 | |
b2cfd8ab CM |
2929 | static void ipmi_bmc_unregister(ipmi_smi_t intf) |
2930 | { | |
2931 | mutex_lock(&intf->bmc_reg_mutex); | |
2932 | __ipmi_bmc_unregister(intf); | |
aa9c9ab2 | 2933 | mutex_unlock(&intf->bmc_reg_mutex); |
50c812b2 CM |
2934 | } |
2935 | ||
b2cfd8ab CM |
2936 | /* |
2937 | * Must be called with intf->bmc_reg_mutex held. | |
2938 | */ | |
2939 | static int __ipmi_bmc_register(ipmi_smi_t intf, | |
2940 | struct ipmi_device_id *id, | |
3fd32f9e | 2941 | bool guid_set, guid_t *guid, int intf_num) |
50c812b2 CM |
2942 | { |
2943 | int rv; | |
b79bba15 | 2944 | struct bmc_device *bmc; |
50c812b2 | 2945 | struct bmc_device *old_bmc; |
50c812b2 | 2946 | |
b2cfd8ab CM |
2947 | /* |
2948 | * platform_device_register() can cause bmc_reg_mutex to | |
2949 | * be claimed because of the is_visible functions of | |
2950 | * the attributes. Eliminate possible recursion and | |
2951 | * release the lock. | |
2952 | */ | |
2953 | intf->in_bmc_register = true; | |
2954 | mutex_unlock(&intf->bmc_reg_mutex); | |
2955 | ||
50c812b2 CM |
2956 | /* |
2957 | * Try to find if there is an bmc_device struct | |
2958 | * representing the interfaced BMC already | |
2959 | */ | |
9ca15af3 | 2960 | mutex_lock(&ipmidriver_mutex); |
b2cfd8ab CM |
2961 | if (guid_set) |
2962 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, guid); | |
50c812b2 | 2963 | else |
fe2d5ffc | 2964 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
b2cfd8ab CM |
2965 | id->product_id, |
2966 | id->device_id); | |
50c812b2 CM |
2967 | |
2968 | /* | |
2969 | * If there is already an bmc_device, free the new one, | |
2970 | * otherwise register the new BMC device | |
2971 | */ | |
2972 | if (old_bmc) { | |
aa9c9ab2 | 2973 | bmc = old_bmc; |
b2cfd8ab CM |
2974 | /* |
2975 | * Note: old_bmc already has usecount incremented by | |
2976 | * the BMC find functions. | |
2977 | */ | |
50c812b2 | 2978 | intf->bmc = old_bmc; |
aa9c9ab2 | 2979 | mutex_lock(&bmc->dyn_mutex); |
a9137c3d | 2980 | list_add_tail(&intf->bmc_link, &bmc->intfs); |
aa9c9ab2 | 2981 | mutex_unlock(&bmc->dyn_mutex); |
50c812b2 | 2982 | |
106a8461 CM |
2983 | dev_info(intf->si_dev, |
2984 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2985 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2986 | bmc->id.manufacturer_id, | |
2987 | bmc->id.product_id, | |
2988 | bmc->id.device_id); | |
50c812b2 | 2989 | } else { |
c659ff34 CM |
2990 | bmc = kzalloc(sizeof(*bmc), GFP_KERNEL); |
2991 | if (!bmc) { | |
2992 | rv = -ENOMEM; | |
2993 | goto out; | |
2994 | } | |
2995 | INIT_LIST_HEAD(&bmc->intfs); | |
2996 | mutex_init(&bmc->dyn_mutex); | |
b2cfd8ab CM |
2997 | INIT_WORK(&bmc->remove_work, cleanup_bmc_work); |
2998 | ||
2999 | bmc->id = *id; | |
3000 | bmc->dyn_id_set = 1; | |
3001 | bmc->dyn_guid_set = guid_set; | |
3fd32f9e | 3002 | bmc->guid = *guid; |
b2cfd8ab | 3003 | bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY; |
c659ff34 | 3004 | |
68e7e50f | 3005 | bmc->pdev.name = "ipmi_bmc"; |
f0b55da0 | 3006 | |
68e7e50f CM |
3007 | rv = ida_simple_get(&ipmi_bmc_ida, 0, 0, GFP_KERNEL); |
3008 | if (rv < 0) | |
3009 | goto out; | |
16639eb0 | 3010 | bmc->pdev.dev.driver = &ipmidriver.driver; |
68e7e50f | 3011 | bmc->pdev.id = rv; |
16639eb0 CM |
3012 | bmc->pdev.dev.release = release_bmc_device; |
3013 | bmc->pdev.dev.type = &bmc_device_type; | |
5a0e10ec | 3014 | kref_init(&bmc->usecount); |
50c812b2 | 3015 | |
aa9c9ab2 JK |
3016 | intf->bmc = bmc; |
3017 | mutex_lock(&bmc->dyn_mutex); | |
a9137c3d | 3018 | list_add_tail(&intf->bmc_link, &bmc->intfs); |
aa9c9ab2 JK |
3019 | mutex_unlock(&bmc->dyn_mutex); |
3020 | ||
3021 | rv = platform_device_register(&bmc->pdev); | |
50c812b2 | 3022 | if (rv) { |
106a8461 CM |
3023 | dev_err(intf->si_dev, |
3024 | PFX " Unable to register bmc device: %d\n", | |
3025 | rv); | |
a2cb600f | 3026 | goto out_list_del; |
50c812b2 CM |
3027 | } |
3028 | ||
106a8461 CM |
3029 | dev_info(intf->si_dev, |
3030 | "Found new BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
279fbd0c MS |
3031 | bmc->id.manufacturer_id, |
3032 | bmc->id.product_id, | |
3033 | bmc->id.device_id); | |
50c812b2 CM |
3034 | } |
3035 | ||
3036 | /* | |
3037 | * create symlink from system interface device to bmc device | |
3038 | * and back. | |
3039 | */ | |
5a0e10ec | 3040 | rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc"); |
50c812b2 | 3041 | if (rv) { |
106a8461 CM |
3042 | dev_err(intf->si_dev, |
3043 | PFX "Unable to create bmc symlink: %d\n", rv); | |
a2cb600f | 3044 | goto out_put_bmc; |
50c812b2 CM |
3045 | } |
3046 | ||
b2cfd8ab CM |
3047 | if (intf_num == -1) |
3048 | intf_num = intf->intf_num; | |
3049 | intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", intf_num); | |
50c812b2 CM |
3050 | if (!intf->my_dev_name) { |
3051 | rv = -ENOMEM; | |
106a8461 CM |
3052 | dev_err(intf->si_dev, |
3053 | PFX "Unable to allocate link from BMC: %d\n", rv); | |
a2cb600f | 3054 | goto out_unlink1; |
50c812b2 | 3055 | } |
50c812b2 | 3056 | |
16639eb0 | 3057 | rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj, |
50c812b2 CM |
3058 | intf->my_dev_name); |
3059 | if (rv) { | |
3060 | kfree(intf->my_dev_name); | |
3061 | intf->my_dev_name = NULL; | |
106a8461 CM |
3062 | dev_err(intf->si_dev, |
3063 | PFX "Unable to create symlink to bmc: %d\n", rv); | |
a2cb600f | 3064 | goto out_free_my_dev_name; |
50c812b2 CM |
3065 | } |
3066 | ||
a2cb600f | 3067 | intf->bmc_registered = true; |
50c812b2 | 3068 | |
a2cb600f | 3069 | out: |
b2cfd8ab CM |
3070 | mutex_unlock(&ipmidriver_mutex); |
3071 | mutex_lock(&intf->bmc_reg_mutex); | |
3072 | intf->in_bmc_register = false; | |
50c812b2 | 3073 | return rv; |
a2cb600f CM |
3074 | |
3075 | ||
3076 | out_free_my_dev_name: | |
3077 | kfree(intf->my_dev_name); | |
3078 | intf->my_dev_name = NULL; | |
3079 | ||
3080 | out_unlink1: | |
3081 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); | |
3082 | ||
3083 | out_put_bmc: | |
aa9c9ab2 | 3084 | mutex_lock(&bmc->dyn_mutex); |
a9137c3d | 3085 | list_del(&intf->bmc_link); |
aa9c9ab2 | 3086 | mutex_unlock(&bmc->dyn_mutex); |
c659ff34 | 3087 | intf->bmc = &intf->tmp_bmc; |
a2cb600f | 3088 | kref_put(&bmc->usecount, cleanup_bmc_device); |
a2cb600f CM |
3089 | goto out; |
3090 | ||
3091 | out_list_del: | |
aa9c9ab2 | 3092 | mutex_lock(&bmc->dyn_mutex); |
a9137c3d | 3093 | list_del(&intf->bmc_link); |
aa9c9ab2 | 3094 | mutex_unlock(&bmc->dyn_mutex); |
c659ff34 | 3095 | intf->bmc = &intf->tmp_bmc; |
a2cb600f CM |
3096 | put_device(&bmc->pdev.dev); |
3097 | goto out; | |
50c812b2 CM |
3098 | } |
3099 | ||
3100 | static int | |
3101 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
3102 | { | |
3103 | struct kernel_ipmi_msg msg; | |
3104 | struct ipmi_system_interface_addr si; | |
3105 | ||
3106 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3107 | si.channel = IPMI_BMC_CHANNEL; | |
3108 | si.lun = 0; | |
3109 | ||
3110 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
3111 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
3112 | msg.data = NULL; | |
3113 | msg.data_len = 0; | |
3114 | return i_ipmi_request(NULL, | |
3115 | intf, | |
3116 | (struct ipmi_addr *) &si, | |
3117 | 0, | |
3118 | &msg, | |
3119 | intf, | |
3120 | NULL, | |
3121 | NULL, | |
3122 | 0, | |
5fdb1fb2 CM |
3123 | intf->addrinfo[0].address, |
3124 | intf->addrinfo[0].lun, | |
50c812b2 CM |
3125 | -1, 0); |
3126 | } | |
3127 | ||
28f26ac7 | 3128 | static void guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
50c812b2 | 3129 | { |
28f26ac7 CM |
3130 | struct bmc_device *bmc = intf->bmc; |
3131 | ||
50c812b2 CM |
3132 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3133 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
3134 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
3135 | /* Not for me */ | |
3136 | return; | |
3137 | ||
3138 | if (msg->msg.data[0] != 0) { | |
3139 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
28f26ac7 | 3140 | bmc->dyn_guid_set = 0; |
50c812b2 CM |
3141 | goto out; |
3142 | } | |
3143 | ||
3144 | if (msg->msg.data_len < 17) { | |
28f26ac7 | 3145 | bmc->dyn_guid_set = 0; |
106a8461 CM |
3146 | dev_warn(intf->si_dev, |
3147 | PFX "The GUID response from the BMC was too short, it was %d but should have been 17. Assuming GUID is not available.\n", | |
3148 | msg->msg.data_len); | |
50c812b2 CM |
3149 | goto out; |
3150 | } | |
3151 | ||
3fd32f9e | 3152 | memcpy(bmc->fetch_guid.b, msg->msg.data + 1, 16); |
28f26ac7 CM |
3153 | /* |
3154 | * Make sure the guid data is available before setting | |
3155 | * dyn_guid_set. | |
3156 | */ | |
3157 | smp_wmb(); | |
3158 | bmc->dyn_guid_set = 1; | |
50c812b2 CM |
3159 | out: |
3160 | wake_up(&intf->waitq); | |
3161 | } | |
3162 | ||
28f26ac7 | 3163 | static void __get_guid(ipmi_smi_t intf) |
50c812b2 CM |
3164 | { |
3165 | int rv; | |
28f26ac7 | 3166 | struct bmc_device *bmc = intf->bmc; |
50c812b2 | 3167 | |
28f26ac7 | 3168 | bmc->dyn_guid_set = 2; |
50c812b2 CM |
3169 | intf->null_user_handler = guid_handler; |
3170 | rv = send_guid_cmd(intf, 0); | |
3171 | if (rv) | |
3172 | /* Send failed, no GUID available. */ | |
28f26ac7 CM |
3173 | bmc->dyn_guid_set = 0; |
3174 | ||
3175 | wait_event(intf->waitq, bmc->dyn_guid_set != 2); | |
3176 | ||
3177 | /* dyn_guid_set makes the guid data available. */ | |
3178 | smp_rmb(); | |
3179 | ||
50c812b2 CM |
3180 | intf->null_user_handler = NULL; |
3181 | } | |
3182 | ||
1da177e4 LT |
3183 | static int |
3184 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
3185 | { | |
3186 | struct kernel_ipmi_msg msg; | |
3187 | unsigned char data[1]; | |
3188 | struct ipmi_system_interface_addr si; | |
3189 | ||
3190 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3191 | si.channel = IPMI_BMC_CHANNEL; | |
3192 | si.lun = 0; | |
3193 | ||
3194 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
3195 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
3196 | msg.data = data; | |
3197 | msg.data_len = 1; | |
3198 | data[0] = chan; | |
3199 | return i_ipmi_request(NULL, | |
3200 | intf, | |
3201 | (struct ipmi_addr *) &si, | |
3202 | 0, | |
3203 | &msg, | |
56a55ec6 | 3204 | intf, |
1da177e4 LT |
3205 | NULL, |
3206 | NULL, | |
3207 | 0, | |
5fdb1fb2 CM |
3208 | intf->addrinfo[0].address, |
3209 | intf->addrinfo[0].lun, | |
1da177e4 LT |
3210 | -1, 0); |
3211 | } | |
3212 | ||
3213 | static void | |
56a55ec6 | 3214 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
3215 | { |
3216 | int rv = 0; | |
31b0b073 CM |
3217 | int ch; |
3218 | unsigned int set = intf->curr_working_cset; | |
3219 | struct ipmi_channel *chans; | |
1da177e4 | 3220 | |
56a55ec6 CM |
3221 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
3222 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 3223 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 3224 | /* It's the one we want */ |
56a55ec6 | 3225 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
3226 | /* Got an error from the channel, just go on. */ |
3227 | ||
56a55ec6 | 3228 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
3229 | /* |
3230 | * If the MC does not support this | |
3231 | * command, that is legal. We just | |
3232 | * assume it has one IPMB at channel | |
3233 | * zero. | |
3234 | */ | |
31b0b073 | 3235 | intf->wchannels[set].c[0].medium |
1da177e4 | 3236 | = IPMI_CHANNEL_MEDIUM_IPMB; |
31b0b073 | 3237 | intf->wchannels[set].c[0].protocol |
1da177e4 | 3238 | = IPMI_CHANNEL_PROTOCOL_IPMB; |
1da177e4 | 3239 | |
31b0b073 CM |
3240 | intf->channel_list = intf->wchannels + set; |
3241 | intf->channels_ready = true; | |
1da177e4 LT |
3242 | wake_up(&intf->waitq); |
3243 | goto out; | |
3244 | } | |
3245 | goto next_channel; | |
3246 | } | |
56a55ec6 | 3247 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
3248 | /* Message not big enough, just go on. */ |
3249 | goto next_channel; | |
3250 | } | |
31b0b073 CM |
3251 | ch = intf->curr_channel; |
3252 | chans = intf->wchannels[set].c; | |
3253 | chans[ch].medium = msg->msg.data[2] & 0x7f; | |
3254 | chans[ch].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 3255 | |
c70d7499 | 3256 | next_channel: |
1da177e4 | 3257 | intf->curr_channel++; |
31b0b073 CM |
3258 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) { |
3259 | intf->channel_list = intf->wchannels + set; | |
3260 | intf->channels_ready = true; | |
1da177e4 | 3261 | wake_up(&intf->waitq); |
31b0b073 CM |
3262 | } else { |
3263 | intf->channel_list = intf->wchannels + set; | |
3264 | intf->channels_ready = true; | |
1da177e4 | 3265 | rv = send_channel_info_cmd(intf, intf->curr_channel); |
31b0b073 | 3266 | } |
1da177e4 LT |
3267 | |
3268 | if (rv) { | |
3269 | /* Got an error somehow, just give up. */ | |
106a8461 CM |
3270 | dev_warn(intf->si_dev, |
3271 | PFX "Error sending channel information for channel %d: %d\n", | |
3272 | intf->curr_channel, rv); | |
1f668423 | 3273 | |
31b0b073 CM |
3274 | intf->channel_list = intf->wchannels + set; |
3275 | intf->channels_ready = true; | |
1da177e4 | 3276 | wake_up(&intf->waitq); |
1da177e4 LT |
3277 | } |
3278 | } | |
3279 | out: | |
3280 | return; | |
3281 | } | |
3282 | ||
31b0b073 CM |
3283 | /* |
3284 | * Must be holding intf->bmc_reg_mutex to call this. | |
3285 | */ | |
3286 | static int __scan_channels(ipmi_smi_t intf, struct ipmi_device_id *id) | |
3287 | { | |
3288 | int rv; | |
3289 | ||
3290 | if (ipmi_version_major(id) > 1 | |
3291 | || (ipmi_version_major(id) == 1 | |
3292 | && ipmi_version_minor(id) >= 5)) { | |
3293 | unsigned int set; | |
3294 | ||
3295 | /* | |
3296 | * Start scanning the channels to see what is | |
3297 | * available. | |
3298 | */ | |
3299 | set = !intf->curr_working_cset; | |
3300 | intf->curr_working_cset = set; | |
3301 | memset(&intf->wchannels[set], 0, | |
3302 | sizeof(struct ipmi_channel_set)); | |
3303 | ||
3304 | intf->null_user_handler = channel_handler; | |
3305 | intf->curr_channel = 0; | |
3306 | rv = send_channel_info_cmd(intf, 0); | |
3307 | if (rv) { | |
3308 | dev_warn(intf->si_dev, | |
3309 | "Error sending channel information for channel 0, %d\n", | |
3310 | rv); | |
3311 | return -EIO; | |
3312 | } | |
3313 | ||
3314 | /* Wait for the channel info to be read. */ | |
3315 | wait_event(intf->waitq, intf->channels_ready); | |
3316 | intf->null_user_handler = NULL; | |
3317 | } else { | |
3318 | unsigned int set = intf->curr_working_cset; | |
3319 | ||
3320 | /* Assume a single IPMB channel at zero. */ | |
3321 | intf->wchannels[set].c[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
3322 | intf->wchannels[set].c[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
3323 | intf->channel_list = intf->wchannels + set; | |
3324 | intf->channels_ready = true; | |
3325 | } | |
3326 | ||
3327 | return 0; | |
3328 | } | |
3329 | ||
895dcfd1 | 3330 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 3331 | { |
fcfa4724 CM |
3332 | if (intf->handlers->poll) |
3333 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
3334 | /* In case something came in */ |
3335 | handle_new_recv_msgs(intf); | |
fcfa4724 | 3336 | } |
895dcfd1 CM |
3337 | |
3338 | void ipmi_poll_interface(ipmi_user_t user) | |
3339 | { | |
3340 | ipmi_poll(user->intf); | |
fcfa4724 | 3341 | } |
c70d7499 | 3342 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 3343 | |
c0734bd5 CM |
3344 | static void redo_bmc_reg(struct work_struct *work) |
3345 | { | |
3346 | ipmi_smi_t intf = container_of(work, struct ipmi_smi, bmc_reg_work); | |
3347 | ||
3348 | if (!intf->in_shutdown) | |
3349 | bmc_get_device_id(intf, NULL, NULL, NULL, NULL); | |
3350 | ||
3351 | kref_put(&intf->refcount, intf_free); | |
3352 | } | |
3353 | ||
81d02b7f | 3354 | int ipmi_register_smi(const struct ipmi_smi_handlers *handlers, |
1da177e4 | 3355 | void *send_info, |
50c812b2 | 3356 | struct device *si_dev, |
453823ba | 3357 | unsigned char slave_addr) |
1da177e4 LT |
3358 | { |
3359 | int i, j; | |
3360 | int rv; | |
393d2cc3 | 3361 | ipmi_smi_t intf; |
bca0324d | 3362 | ipmi_smi_t tintf; |
bca0324d | 3363 | struct list_head *link; |
511d57dc | 3364 | struct ipmi_device_id id; |
1da177e4 | 3365 | |
c70d7499 CM |
3366 | /* |
3367 | * Make sure the driver is actually initialized, this handles | |
3368 | * problems with initialization order. | |
3369 | */ | |
1da177e4 LT |
3370 | if (!initialized) { |
3371 | rv = ipmi_init_msghandler(); | |
3372 | if (rv) | |
3373 | return rv; | |
c70d7499 CM |
3374 | /* |
3375 | * The init code doesn't return an error if it was turned | |
3376 | * off, but it won't initialize. Check that. | |
3377 | */ | |
1da177e4 LT |
3378 | if (!initialized) |
3379 | return -ENODEV; | |
3380 | } | |
3381 | ||
dd00cc48 | 3382 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 3383 | if (!intf) |
1da177e4 | 3384 | return -ENOMEM; |
b2c03941 | 3385 | |
c659ff34 | 3386 | intf->bmc = &intf->tmp_bmc; |
a9137c3d | 3387 | INIT_LIST_HEAD(&intf->bmc->intfs); |
aa9c9ab2 JK |
3388 | mutex_init(&intf->bmc->dyn_mutex); |
3389 | INIT_LIST_HEAD(&intf->bmc_link); | |
3390 | mutex_init(&intf->bmc_reg_mutex); | |
bca0324d | 3391 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 3392 | kref_init(&intf->refcount); |
c0734bd5 | 3393 | INIT_WORK(&intf->bmc_reg_work, redo_bmc_reg); |
50c812b2 | 3394 | intf->si_dev = si_dev; |
393d2cc3 | 3395 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
5fdb1fb2 CM |
3396 | intf->addrinfo[j].address = IPMI_BMC_SLAVE_ADDR; |
3397 | intf->addrinfo[j].lun = 2; | |
393d2cc3 CM |
3398 | } |
3399 | if (slave_addr != 0) | |
5fdb1fb2 | 3400 | intf->addrinfo[0].address = slave_addr; |
393d2cc3 CM |
3401 | INIT_LIST_HEAD(&intf->users); |
3402 | intf->handlers = handlers; | |
3403 | intf->send_info = send_info; | |
3404 | spin_lock_init(&intf->seq_lock); | |
3405 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
3406 | intf->seq_table[j].inuse = 0; | |
3407 | intf->seq_table[j].seqid = 0; | |
3408 | } | |
3409 | intf->curr_seq = 0; | |
55f91cb6 | 3410 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
ac019151 | 3411 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 | 3412 | #endif |
65be7544 CM |
3413 | spin_lock_init(&intf->waiting_rcv_msgs_lock); |
3414 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
7adf579c CM |
3415 | tasklet_init(&intf->recv_tasklet, |
3416 | smi_recv_tasklet, | |
3417 | (unsigned long) intf); | |
3418 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
7ea0ed2b CM |
3419 | spin_lock_init(&intf->xmit_msgs_lock); |
3420 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
3421 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
393d2cc3 | 3422 | spin_lock_init(&intf->events_lock); |
89986496 CM |
3423 | atomic_set(&intf->event_waiters, 0); |
3424 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
3425 | INIT_LIST_HEAD(&intf->waiting_events); |
3426 | intf->waiting_events_count = 0; | |
d6dfd131 | 3427 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 3428 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
3429 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
3430 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
3431 | for (i = 0; i < IPMI_NUM_STATS; i++) |
3432 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 3433 | |
55f91cb6 | 3434 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
393d2cc3 | 3435 | intf->proc_dir = NULL; |
55f91cb6 | 3436 | #endif |
1da177e4 | 3437 | |
b2c03941 | 3438 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
3439 | mutex_lock(&ipmi_interfaces_mutex); |
3440 | /* Look for a hole in the numbers. */ | |
3441 | i = 0; | |
3442 | link = &ipmi_interfaces; | |
3443 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
3444 | if (tintf->intf_num != i) { | |
3445 | link = &tintf->link; | |
1da177e4 LT |
3446 | break; |
3447 | } | |
bca0324d | 3448 | i++; |
1da177e4 | 3449 | } |
bca0324d CM |
3450 | /* Add the new interface in numeric order. */ |
3451 | if (i == 0) | |
3452 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
3453 | else | |
3454 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 3455 | |
453823ba CM |
3456 | rv = handlers->start_processing(send_info, intf); |
3457 | if (rv) | |
3458 | goto out; | |
1da177e4 | 3459 | |
b2cfd8ab | 3460 | rv = __bmc_get_device_id(intf, NULL, &id, NULL, NULL, i); |
511d57dc CM |
3461 | if (rv) { |
3462 | dev_err(si_dev, "Unable to get the device id: %d\n", rv); | |
3463 | goto out; | |
3464 | } | |
3465 | ||
31b0b073 CM |
3466 | mutex_lock(&intf->bmc_reg_mutex); |
3467 | rv = __scan_channels(intf, &id); | |
3468 | mutex_unlock(&intf->bmc_reg_mutex); | |
3469 | if (rv) | |
3470 | goto out; | |
1da177e4 | 3471 | |
55f91cb6 | 3472 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
a2cb600f | 3473 | rv = add_proc_entries(intf, i); |
55f91cb6 | 3474 | #endif |
1da177e4 | 3475 | |
393d2cc3 | 3476 | out: |
1da177e4 | 3477 | if (rv) { |
a2cb600f | 3478 | ipmi_bmc_unregister(intf); |
55f91cb6 | 3479 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
393d2cc3 CM |
3480 | if (intf->proc_dir) |
3481 | remove_proc_entries(intf); | |
55f91cb6 | 3482 | #endif |
b2c03941 | 3483 | intf->handlers = NULL; |
bca0324d CM |
3484 | list_del_rcu(&intf->link); |
3485 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 3486 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 3487 | synchronize_rcu(); |
393d2cc3 | 3488 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 3489 | } else { |
78ba2faf CM |
3490 | /* |
3491 | * Keep memory order straight for RCU readers. Make | |
3492 | * sure everything else is committed to memory before | |
3493 | * setting intf_num to mark the interface valid. | |
3494 | */ | |
3495 | smp_wmb(); | |
bca0324d CM |
3496 | intf->intf_num = i; |
3497 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 3498 | /* After this point the interface is legal to use. */ |
50c812b2 | 3499 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 3500 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
3501 | } |
3502 | ||
3503 | return rv; | |
3504 | } | |
c70d7499 | 3505 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 3506 | |
7ea0ed2b CM |
3507 | static void deliver_smi_err_response(ipmi_smi_t intf, |
3508 | struct ipmi_smi_msg *msg, | |
3509 | unsigned char err) | |
3510 | { | |
3511 | msg->rsp[0] = msg->data[0] | 4; | |
3512 | msg->rsp[1] = msg->data[1]; | |
3513 | msg->rsp[2] = err; | |
3514 | msg->rsp_size = 3; | |
3515 | /* It's an error, so it will never requeue, no need to check return. */ | |
3516 | handle_one_recv_msg(intf, msg); | |
3517 | } | |
3518 | ||
b2c03941 CM |
3519 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
3520 | { | |
3521 | int i; | |
3522 | struct seq_table *ent; | |
7ea0ed2b CM |
3523 | struct ipmi_smi_msg *msg; |
3524 | struct list_head *entry; | |
3525 | struct list_head tmplist; | |
3526 | ||
3527 | /* Clear out our transmit queues and hold the messages. */ | |
3528 | INIT_LIST_HEAD(&tmplist); | |
3529 | list_splice_tail(&intf->hp_xmit_msgs, &tmplist); | |
3530 | list_splice_tail(&intf->xmit_msgs, &tmplist); | |
3531 | ||
3532 | /* Current message first, to preserve order */ | |
3533 | while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) { | |
3534 | /* Wait for the message to clear out. */ | |
3535 | schedule_timeout(1); | |
3536 | } | |
b2c03941 CM |
3537 | |
3538 | /* No need for locks, the interface is down. */ | |
7ea0ed2b CM |
3539 | |
3540 | /* | |
3541 | * Return errors for all pending messages in queue and in the | |
3542 | * tables waiting for remote responses. | |
3543 | */ | |
3544 | while (!list_empty(&tmplist)) { | |
3545 | entry = tmplist.next; | |
3546 | list_del(entry); | |
3547 | msg = list_entry(entry, struct ipmi_smi_msg, link); | |
3548 | deliver_smi_err_response(intf, msg, IPMI_ERR_UNSPECIFIED); | |
3549 | } | |
3550 | ||
b2c03941 CM |
3551 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
3552 | ent = &(intf->seq_table[i]); | |
3553 | if (!ent->inuse) | |
3554 | continue; | |
3555 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
3556 | } | |
3557 | } | |
3558 | ||
1da177e4 LT |
3559 | int ipmi_unregister_smi(ipmi_smi_t intf) |
3560 | { | |
1da177e4 | 3561 | struct ipmi_smi_watcher *w; |
7ea0ed2b CM |
3562 | int intf_num = intf->intf_num; |
3563 | ipmi_user_t user; | |
1da177e4 | 3564 | |
b2c03941 | 3565 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 3566 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 | 3567 | intf->intf_num = -1; |
7ea0ed2b | 3568 | intf->in_shutdown = true; |
bca0324d CM |
3569 | list_del_rcu(&intf->link); |
3570 | mutex_unlock(&ipmi_interfaces_mutex); | |
3571 | synchronize_rcu(); | |
1da177e4 | 3572 | |
b2c03941 CM |
3573 | cleanup_smi_msgs(intf); |
3574 | ||
7ea0ed2b CM |
3575 | /* Clean up the effects of users on the lower-level software. */ |
3576 | mutex_lock(&ipmi_interfaces_mutex); | |
3577 | rcu_read_lock(); | |
3578 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3579 | module_put(intf->handlers->owner); | |
3580 | if (intf->handlers->dec_usecount) | |
3581 | intf->handlers->dec_usecount(intf->send_info); | |
3582 | } | |
3583 | rcu_read_unlock(); | |
3584 | intf->handlers = NULL; | |
3585 | mutex_unlock(&ipmi_interfaces_mutex); | |
3586 | ||
55f91cb6 | 3587 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
393d2cc3 | 3588 | remove_proc_entries(intf); |
55f91cb6 | 3589 | #endif |
bd85f4b3 | 3590 | ipmi_bmc_unregister(intf); |
1da177e4 | 3591 | |
c70d7499 CM |
3592 | /* |
3593 | * Call all the watcher interfaces to tell them that | |
3594 | * an interface is gone. | |
3595 | */ | |
393d2cc3 | 3596 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3597 | w->smi_gone(intf_num); |
3598 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3599 | |
393d2cc3 | 3600 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3601 | return 0; |
3602 | } | |
c70d7499 | 3603 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3604 | |
3605 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3606 | struct ipmi_smi_msg *msg) | |
3607 | { | |
3608 | struct ipmi_ipmb_addr ipmb_addr; | |
3609 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3610 | |
c70d7499 CM |
3611 | /* |
3612 | * This is 11, not 10, because the response must contain a | |
3613 | * completion code. | |
3614 | */ | |
1da177e4 LT |
3615 | if (msg->rsp_size < 11) { |
3616 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3617 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3618 | return 0; |
3619 | } | |
3620 | ||
3621 | if (msg->rsp[2] != 0) { | |
3622 | /* An error getting the response, just ignore it. */ | |
3623 | return 0; | |
3624 | } | |
3625 | ||
3626 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3627 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3628 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3629 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3630 | ||
c70d7499 CM |
3631 | /* |
3632 | * It's a response from a remote entity. Look up the sequence | |
3633 | * number and handle the response. | |
3634 | */ | |
1da177e4 LT |
3635 | if (intf_find_seq(intf, |
3636 | msg->rsp[7] >> 2, | |
3637 | msg->rsp[3] & 0x0f, | |
3638 | msg->rsp[8], | |
3639 | (msg->rsp[4] >> 2) & (~1), | |
3640 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3641 | &recv_msg)) { |
3642 | /* | |
3643 | * We were unable to find the sequence number, | |
3644 | * so just nuke the message. | |
3645 | */ | |
b2655f26 | 3646 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3647 | return 0; |
3648 | } | |
3649 | ||
3650 | memcpy(recv_msg->msg_data, | |
3651 | &(msg->rsp[9]), | |
3652 | msg->rsp_size - 9); | |
c70d7499 CM |
3653 | /* |
3654 | * The other fields matched, so no need to set them, except | |
3655 | * for netfn, which needs to be the response that was | |
3656 | * returned, not the request value. | |
3657 | */ | |
1da177e4 LT |
3658 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3659 | recv_msg->msg.data = recv_msg->msg_data; | |
3660 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3661 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3662 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3663 | deliver_response(recv_msg); |
3664 | ||
3665 | return 0; | |
3666 | } | |
3667 | ||
3668 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3669 | struct ipmi_smi_msg *msg) | |
3670 | { | |
393d2cc3 CM |
3671 | struct cmd_rcvr *rcvr; |
3672 | int rv = 0; | |
3673 | unsigned char netfn; | |
3674 | unsigned char cmd; | |
c69c3127 | 3675 | unsigned char chan; |
393d2cc3 CM |
3676 | ipmi_user_t user = NULL; |
3677 | struct ipmi_ipmb_addr *ipmb_addr; | |
3678 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3679 | |
3680 | if (msg->rsp_size < 10) { | |
3681 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3682 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3683 | return 0; |
3684 | } | |
3685 | ||
3686 | if (msg->rsp[2] != 0) { | |
3687 | /* An error getting the response, just ignore it. */ | |
3688 | return 0; | |
3689 | } | |
3690 | ||
3691 | netfn = msg->rsp[4] >> 2; | |
3692 | cmd = msg->rsp[8]; | |
c69c3127 | 3693 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3694 | |
e61fb5b6 | 3695 | rcu_read_lock(); |
c69c3127 | 3696 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3697 | if (rcvr) { |
3698 | user = rcvr->user; | |
3699 | kref_get(&user->refcount); | |
3700 | } else | |
3701 | user = NULL; | |
e61fb5b6 | 3702 | rcu_read_unlock(); |
1da177e4 LT |
3703 | |
3704 | if (user == NULL) { | |
3705 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3706 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3707 | |
3708 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3709 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3710 | msg->data[2] = msg->rsp[3]; | |
3711 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3712 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3713 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
5fdb1fb2 | 3714 | msg->data[6] = intf->addrinfo[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3715 | /* rqseq/lun */ |
3716 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3717 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3718 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3719 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3720 | msg->data_size = 11; | |
3721 | ||
3722 | #ifdef DEBUG_MSGING | |
3723 | { | |
3724 | int m; | |
3725 | printk("Invalid command:"); | |
e8b33617 | 3726 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3727 | printk(" %2.2x", msg->data[m]); |
3728 | printk("\n"); | |
3729 | } | |
3730 | #endif | |
b2c03941 | 3731 | rcu_read_lock(); |
7ea0ed2b CM |
3732 | if (!intf->in_shutdown) { |
3733 | smi_send(intf, intf->handlers, msg, 0); | |
c70d7499 CM |
3734 | /* |
3735 | * We used the message, so return the value | |
3736 | * that causes it to not be freed or | |
3737 | * queued. | |
3738 | */ | |
b2c03941 CM |
3739 | rv = -1; |
3740 | } | |
3741 | rcu_read_unlock(); | |
1da177e4 LT |
3742 | } else { |
3743 | /* Deliver the message to the user. */ | |
b2655f26 | 3744 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3745 | |
3746 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3747 | if (!recv_msg) { |
c70d7499 CM |
3748 | /* |
3749 | * We couldn't allocate memory for the | |
3750 | * message, so requeue it for handling | |
3751 | * later. | |
3752 | */ | |
1da177e4 | 3753 | rv = 1; |
393d2cc3 | 3754 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3755 | } else { |
3756 | /* Extract the source address from the data. */ | |
3757 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3758 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3759 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3760 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3761 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3762 | ||
c70d7499 CM |
3763 | /* |
3764 | * Extract the rest of the message information | |
3765 | * from the IPMB header. | |
3766 | */ | |
1da177e4 LT |
3767 | recv_msg->user = user; |
3768 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3769 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3770 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3771 | recv_msg->msg.cmd = msg->rsp[8]; | |
3772 | recv_msg->msg.data = recv_msg->msg_data; | |
3773 | ||
c70d7499 CM |
3774 | /* |
3775 | * We chop off 10, not 9 bytes because the checksum | |
3776 | * at the end also needs to be removed. | |
3777 | */ | |
1da177e4 LT |
3778 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3779 | memcpy(recv_msg->msg_data, | |
3780 | &(msg->rsp[9]), | |
3781 | msg->rsp_size - 10); | |
3782 | deliver_response(recv_msg); | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | return rv; | |
3787 | } | |
3788 | ||
3789 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3790 | struct ipmi_smi_msg *msg) | |
3791 | { | |
3792 | struct ipmi_lan_addr lan_addr; | |
3793 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3794 | |
3795 | ||
c70d7499 CM |
3796 | /* |
3797 | * This is 13, not 12, because the response must contain a | |
3798 | * completion code. | |
3799 | */ | |
1da177e4 LT |
3800 | if (msg->rsp_size < 13) { |
3801 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3802 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3803 | return 0; |
3804 | } | |
3805 | ||
3806 | if (msg->rsp[2] != 0) { | |
3807 | /* An error getting the response, just ignore it. */ | |
3808 | return 0; | |
3809 | } | |
3810 | ||
3811 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3812 | lan_addr.session_handle = msg->rsp[4]; | |
3813 | lan_addr.remote_SWID = msg->rsp[8]; | |
3814 | lan_addr.local_SWID = msg->rsp[5]; | |
3815 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3816 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3817 | lan_addr.lun = msg->rsp[9] & 3; | |
3818 | ||
c70d7499 CM |
3819 | /* |
3820 | * It's a response from a remote entity. Look up the sequence | |
3821 | * number and handle the response. | |
3822 | */ | |
1da177e4 LT |
3823 | if (intf_find_seq(intf, |
3824 | msg->rsp[9] >> 2, | |
3825 | msg->rsp[3] & 0x0f, | |
3826 | msg->rsp[10], | |
3827 | (msg->rsp[6] >> 2) & (~1), | |
3828 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3829 | &recv_msg)) { |
3830 | /* | |
3831 | * We were unable to find the sequence number, | |
3832 | * so just nuke the message. | |
3833 | */ | |
b2655f26 | 3834 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3835 | return 0; |
3836 | } | |
3837 | ||
3838 | memcpy(recv_msg->msg_data, | |
3839 | &(msg->rsp[11]), | |
3840 | msg->rsp_size - 11); | |
c70d7499 CM |
3841 | /* |
3842 | * The other fields matched, so no need to set them, except | |
3843 | * for netfn, which needs to be the response that was | |
3844 | * returned, not the request value. | |
3845 | */ | |
1da177e4 LT |
3846 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3847 | recv_msg->msg.data = recv_msg->msg_data; | |
3848 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3849 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3850 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3851 | deliver_response(recv_msg); |
3852 | ||
3853 | return 0; | |
3854 | } | |
3855 | ||
3856 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3857 | struct ipmi_smi_msg *msg) | |
3858 | { | |
393d2cc3 CM |
3859 | struct cmd_rcvr *rcvr; |
3860 | int rv = 0; | |
3861 | unsigned char netfn; | |
3862 | unsigned char cmd; | |
c69c3127 | 3863 | unsigned char chan; |
393d2cc3 CM |
3864 | ipmi_user_t user = NULL; |
3865 | struct ipmi_lan_addr *lan_addr; | |
3866 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3867 | |
3868 | if (msg->rsp_size < 12) { | |
3869 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3870 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3871 | return 0; |
3872 | } | |
3873 | ||
3874 | if (msg->rsp[2] != 0) { | |
3875 | /* An error getting the response, just ignore it. */ | |
3876 | return 0; | |
3877 | } | |
3878 | ||
3879 | netfn = msg->rsp[6] >> 2; | |
3880 | cmd = msg->rsp[10]; | |
c69c3127 | 3881 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3882 | |
e61fb5b6 | 3883 | rcu_read_lock(); |
c69c3127 | 3884 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3885 | if (rcvr) { |
3886 | user = rcvr->user; | |
3887 | kref_get(&user->refcount); | |
3888 | } else | |
3889 | user = NULL; | |
e61fb5b6 | 3890 | rcu_read_unlock(); |
1da177e4 LT |
3891 | |
3892 | if (user == NULL) { | |
393d2cc3 | 3893 | /* We didn't find a user, just give up. */ |
b2655f26 | 3894 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3895 | |
c70d7499 CM |
3896 | /* |
3897 | * Don't do anything with these messages, just allow | |
3898 | * them to be freed. | |
3899 | */ | |
3900 | rv = 0; | |
1da177e4 LT |
3901 | } else { |
3902 | /* Deliver the message to the user. */ | |
b2655f26 | 3903 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3904 | |
3905 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3906 | if (!recv_msg) { |
c70d7499 CM |
3907 | /* |
3908 | * We couldn't allocate memory for the | |
3909 | * message, so requeue it for handling later. | |
3910 | */ | |
1da177e4 | 3911 | rv = 1; |
393d2cc3 | 3912 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3913 | } else { |
3914 | /* Extract the source address from the data. */ | |
3915 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3916 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3917 | lan_addr->session_handle = msg->rsp[4]; | |
3918 | lan_addr->remote_SWID = msg->rsp[8]; | |
3919 | lan_addr->local_SWID = msg->rsp[5]; | |
3920 | lan_addr->lun = msg->rsp[9] & 3; | |
3921 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3922 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3923 | ||
c70d7499 CM |
3924 | /* |
3925 | * Extract the rest of the message information | |
3926 | * from the IPMB header. | |
3927 | */ | |
1da177e4 LT |
3928 | recv_msg->user = user; |
3929 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3930 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3931 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3932 | recv_msg->msg.cmd = msg->rsp[10]; | |
3933 | recv_msg->msg.data = recv_msg->msg_data; | |
3934 | ||
c70d7499 CM |
3935 | /* |
3936 | * We chop off 12, not 11 bytes because the checksum | |
3937 | * at the end also needs to be removed. | |
3938 | */ | |
1da177e4 LT |
3939 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3940 | memcpy(recv_msg->msg_data, | |
3941 | &(msg->rsp[11]), | |
3942 | msg->rsp_size - 12); | |
3943 | deliver_response(recv_msg); | |
3944 | } | |
3945 | } | |
3946 | ||
3947 | return rv; | |
3948 | } | |
3949 | ||
4dec302f | 3950 | /* |
3951 | * This routine will handle "Get Message" command responses with | |
3952 | * channels that use an OEM Medium. The message format belongs to | |
3953 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3954 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3955 | */ | |
3956 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3957 | struct ipmi_smi_msg *msg) | |
3958 | { | |
3959 | struct cmd_rcvr *rcvr; | |
3960 | int rv = 0; | |
3961 | unsigned char netfn; | |
3962 | unsigned char cmd; | |
3963 | unsigned char chan; | |
3964 | ipmi_user_t user = NULL; | |
3965 | struct ipmi_system_interface_addr *smi_addr; | |
3966 | struct ipmi_recv_msg *recv_msg; | |
3967 | ||
3968 | /* | |
3969 | * We expect the OEM SW to perform error checking | |
3970 | * so we just do some basic sanity checks | |
3971 | */ | |
3972 | if (msg->rsp_size < 4) { | |
3973 | /* Message not big enough, just ignore it. */ | |
3974 | ipmi_inc_stat(intf, invalid_commands); | |
3975 | return 0; | |
3976 | } | |
3977 | ||
3978 | if (msg->rsp[2] != 0) { | |
3979 | /* An error getting the response, just ignore it. */ | |
3980 | return 0; | |
3981 | } | |
3982 | ||
3983 | /* | |
3984 | * This is an OEM Message so the OEM needs to know how | |
3985 | * handle the message. We do no interpretation. | |
3986 | */ | |
3987 | netfn = msg->rsp[0] >> 2; | |
3988 | cmd = msg->rsp[1]; | |
3989 | chan = msg->rsp[3] & 0xf; | |
3990 | ||
3991 | rcu_read_lock(); | |
3992 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3993 | if (rcvr) { | |
3994 | user = rcvr->user; | |
3995 | kref_get(&user->refcount); | |
3996 | } else | |
3997 | user = NULL; | |
3998 | rcu_read_unlock(); | |
3999 | ||
4000 | if (user == NULL) { | |
4001 | /* We didn't find a user, just give up. */ | |
4002 | ipmi_inc_stat(intf, unhandled_commands); | |
4003 | ||
4004 | /* | |
4005 | * Don't do anything with these messages, just allow | |
4006 | * them to be freed. | |
4007 | */ | |
4008 | ||
4009 | rv = 0; | |
4010 | } else { | |
4011 | /* Deliver the message to the user. */ | |
4012 | ipmi_inc_stat(intf, handled_commands); | |
4013 | ||
4014 | recv_msg = ipmi_alloc_recv_msg(); | |
4015 | if (!recv_msg) { | |
4016 | /* | |
4017 | * We couldn't allocate memory for the | |
4018 | * message, so requeue it for handling | |
4019 | * later. | |
4020 | */ | |
4021 | rv = 1; | |
4022 | kref_put(&user->refcount, free_user); | |
4023 | } else { | |
4024 | /* | |
4025 | * OEM Messages are expected to be delivered via | |
4026 | * the system interface to SMS software. We might | |
4027 | * need to visit this again depending on OEM | |
4028 | * requirements | |
4029 | */ | |
4030 | smi_addr = ((struct ipmi_system_interface_addr *) | |
4031 | &(recv_msg->addr)); | |
4032 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4033 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
4034 | smi_addr->lun = msg->rsp[0] & 3; | |
4035 | ||
4036 | recv_msg->user = user; | |
4037 | recv_msg->user_msg_data = NULL; | |
4038 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
4039 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
4040 | recv_msg->msg.cmd = msg->rsp[1]; | |
4041 | recv_msg->msg.data = recv_msg->msg_data; | |
4042 | ||
4043 | /* | |
4044 | * The message starts at byte 4 which follows the | |
4045 | * the Channel Byte in the "GET MESSAGE" command | |
4046 | */ | |
4047 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
4048 | memcpy(recv_msg->msg_data, | |
4049 | &(msg->rsp[4]), | |
4050 | msg->rsp_size - 4); | |
4051 | deliver_response(recv_msg); | |
4052 | } | |
4053 | } | |
4054 | ||
4055 | return rv; | |
4056 | } | |
4057 | ||
1da177e4 LT |
4058 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
4059 | struct ipmi_smi_msg *msg) | |
4060 | { | |
4061 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 4062 | |
1da177e4 LT |
4063 | recv_msg->msgid = 0; |
4064 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
4065 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4066 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
4067 | smi_addr->lun = msg->rsp[0] & 3; | |
4068 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
4069 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
4070 | recv_msg->msg.cmd = msg->rsp[1]; | |
4071 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
4072 | recv_msg->msg.data = recv_msg->msg_data; | |
4073 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
4074 | } | |
4075 | ||
1da177e4 LT |
4076 | static int handle_read_event_rsp(ipmi_smi_t intf, |
4077 | struct ipmi_smi_msg *msg) | |
4078 | { | |
4079 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
4080 | struct list_head msgs; | |
4081 | ipmi_user_t user; | |
4082 | int rv = 0; | |
4083 | int deliver_count = 0; | |
4084 | unsigned long flags; | |
4085 | ||
4086 | if (msg->rsp_size < 19) { | |
4087 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 4088 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
4089 | return 0; |
4090 | } | |
4091 | ||
4092 | if (msg->rsp[2] != 0) { | |
4093 | /* An error getting the event, just ignore it. */ | |
4094 | return 0; | |
4095 | } | |
4096 | ||
4097 | INIT_LIST_HEAD(&msgs); | |
4098 | ||
393d2cc3 | 4099 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 4100 | |
b2655f26 | 4101 | ipmi_inc_stat(intf, events); |
1da177e4 | 4102 | |
c70d7499 CM |
4103 | /* |
4104 | * Allocate and fill in one message for every user that is | |
4105 | * getting events. | |
4106 | */ | |
393d2cc3 CM |
4107 | rcu_read_lock(); |
4108 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 4109 | if (!user->gets_events) |
1da177e4 LT |
4110 | continue; |
4111 | ||
4112 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 4113 | if (!recv_msg) { |
393d2cc3 | 4114 | rcu_read_unlock(); |
8a3628d5 CM |
4115 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
4116 | link) { | |
1da177e4 LT |
4117 | list_del(&recv_msg->link); |
4118 | ipmi_free_recv_msg(recv_msg); | |
4119 | } | |
c70d7499 CM |
4120 | /* |
4121 | * We couldn't allocate memory for the | |
4122 | * message, so requeue it for handling | |
4123 | * later. | |
4124 | */ | |
1da177e4 LT |
4125 | rv = 1; |
4126 | goto out; | |
4127 | } | |
4128 | ||
4129 | deliver_count++; | |
4130 | ||
4131 | copy_event_into_recv_msg(recv_msg, msg); | |
4132 | recv_msg->user = user; | |
393d2cc3 | 4133 | kref_get(&user->refcount); |
1da177e4 LT |
4134 | list_add_tail(&(recv_msg->link), &msgs); |
4135 | } | |
393d2cc3 | 4136 | rcu_read_unlock(); |
1da177e4 LT |
4137 | |
4138 | if (deliver_count) { | |
4139 | /* Now deliver all the messages. */ | |
4140 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
4141 | list_del(&recv_msg->link); | |
4142 | deliver_response(recv_msg); | |
4143 | } | |
4144 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
4145 | /* |
4146 | * No one to receive the message, put it in queue if there's | |
4147 | * not already too many things in the queue. | |
4148 | */ | |
1da177e4 | 4149 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 4150 | if (!recv_msg) { |
c70d7499 CM |
4151 | /* |
4152 | * We couldn't allocate memory for the | |
4153 | * message, so requeue it for handling | |
4154 | * later. | |
4155 | */ | |
1da177e4 LT |
4156 | rv = 1; |
4157 | goto out; | |
4158 | } | |
4159 | ||
4160 | copy_event_into_recv_msg(recv_msg, msg); | |
4161 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 4162 | intf->waiting_events_count++; |
87ebd06f | 4163 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
4164 | /* |
4165 | * There's too many things in the queue, discard this | |
4166 | * message. | |
4167 | */ | |
106a8461 CM |
4168 | dev_warn(intf->si_dev, |
4169 | PFX "Event queue full, discarding incoming events\n"); | |
87ebd06f | 4170 | intf->event_msg_printed = 1; |
1da177e4 LT |
4171 | } |
4172 | ||
4173 | out: | |
4174 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
4175 | ||
4176 | return rv; | |
4177 | } | |
4178 | ||
4179 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
4180 | struct ipmi_smi_msg *msg) | |
4181 | { | |
4182 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 4183 | struct ipmi_user *user; |
1da177e4 LT |
4184 | |
4185 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 | 4186 | if (recv_msg == NULL) { |
106a8461 CM |
4187 | dev_warn(intf->si_dev, |
4188 | "IPMI message received with no owner. This could be because of a malformed message, or because of a hardware error. Contact your hardware vender for assistance\n"); | |
56a55ec6 CM |
4189 | return 0; |
4190 | } | |
1da177e4 | 4191 | |
393d2cc3 | 4192 | user = recv_msg->user; |
1da177e4 | 4193 | /* Make sure the user still exists. */ |
393d2cc3 | 4194 | if (user && !user->valid) { |
56a55ec6 | 4195 | /* The user for the message went away, so give up. */ |
b2655f26 | 4196 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
4197 | ipmi_free_recv_msg(recv_msg); |
4198 | } else { | |
4199 | struct ipmi_system_interface_addr *smi_addr; | |
4200 | ||
b2655f26 | 4201 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
4202 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
4203 | recv_msg->msgid = msg->msgid; | |
4204 | smi_addr = ((struct ipmi_system_interface_addr *) | |
4205 | &(recv_msg->addr)); | |
4206 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4207 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
4208 | smi_addr->lun = msg->rsp[0] & 3; | |
4209 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
4210 | recv_msg->msg.cmd = msg->rsp[1]; | |
4211 | memcpy(recv_msg->msg_data, | |
4212 | &(msg->rsp[2]), | |
4213 | msg->rsp_size - 2); | |
4214 | recv_msg->msg.data = recv_msg->msg_data; | |
4215 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
4216 | deliver_response(recv_msg); | |
4217 | } | |
4218 | ||
4219 | return 0; | |
4220 | } | |
4221 | ||
c70d7499 | 4222 | /* |
7adf579c | 4223 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
4224 | * 0 if the message should be freed, or -1 if the message should not |
4225 | * be freed or requeued. | |
4226 | */ | |
7adf579c | 4227 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
4228 | struct ipmi_smi_msg *msg) |
4229 | { | |
4230 | int requeue; | |
4231 | int chan; | |
4232 | ||
4233 | #ifdef DEBUG_MSGING | |
4234 | int m; | |
4235 | printk("Recv:"); | |
e8b33617 | 4236 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
4237 | printk(" %2.2x", msg->rsp[m]); |
4238 | printk("\n"); | |
4239 | #endif | |
4240 | if (msg->rsp_size < 2) { | |
4241 | /* Message is too small to be correct. */ | |
106a8461 CM |
4242 | dev_warn(intf->si_dev, |
4243 | PFX "BMC returned to small a message for netfn %x cmd %x, got %d bytes\n", | |
4244 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
1da177e4 LT |
4245 | |
4246 | /* Generate an error response for the message. */ | |
4247 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
4248 | msg->rsp[1] = msg->data[1]; | |
4249 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
4250 | msg->rsp_size = 3; | |
c70d7499 CM |
4251 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
4252 | || (msg->rsp[1] != msg->data[1])) { | |
4253 | /* | |
4254 | * The NetFN and Command in the response is not even | |
4255 | * marginally correct. | |
4256 | */ | |
106a8461 CM |
4257 | dev_warn(intf->si_dev, |
4258 | PFX "BMC returned incorrect response, expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
4259 | (msg->data[0] >> 2) | 1, msg->data[1], | |
4260 | msg->rsp[0] >> 2, msg->rsp[1]); | |
1da177e4 LT |
4261 | |
4262 | /* Generate an error response for the message. */ | |
4263 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
4264 | msg->rsp[1] = msg->data[1]; | |
4265 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
4266 | msg->rsp_size = 3; | |
4267 | } | |
4268 | ||
4269 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
4270 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
4271 | && (msg->user_data != NULL)) { |
4272 | /* | |
4273 | * It's a response to a response we sent. For this we | |
4274 | * deliver a send message response to the user. | |
4275 | */ | |
393d2cc3 | 4276 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
4277 | |
4278 | requeue = 0; | |
4279 | if (msg->rsp_size < 2) | |
4280 | /* Message is too small to be correct. */ | |
4281 | goto out; | |
4282 | ||
4283 | chan = msg->data[2] & 0x0f; | |
4284 | if (chan >= IPMI_MAX_CHANNELS) | |
4285 | /* Invalid channel number */ | |
4286 | goto out; | |
4287 | ||
393d2cc3 CM |
4288 | if (!recv_msg) |
4289 | goto out; | |
4290 | ||
4291 | /* Make sure the user still exists. */ | |
4292 | if (!recv_msg->user || !recv_msg->user->valid) | |
4293 | goto out; | |
4294 | ||
4295 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
4296 | recv_msg->msg.data = recv_msg->msg_data; | |
4297 | recv_msg->msg.data_len = 1; | |
4298 | recv_msg->msg_data[0] = msg->rsp[2]; | |
4299 | deliver_response(recv_msg); | |
1da177e4 | 4300 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 4301 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
31b0b073 CM |
4302 | struct ipmi_channel *chans; |
4303 | ||
1da177e4 LT |
4304 | /* It's from the receive queue. */ |
4305 | chan = msg->rsp[3] & 0xf; | |
4306 | if (chan >= IPMI_MAX_CHANNELS) { | |
4307 | /* Invalid channel number */ | |
4308 | requeue = 0; | |
4309 | goto out; | |
4310 | } | |
4311 | ||
4dec302f | 4312 | /* |
9a2845c4 CM |
4313 | * We need to make sure the channels have been initialized. |
4314 | * The channel_handler routine will set the "curr_channel" | |
4315 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
4316 | * channels for this interface have been initialized. | |
4317 | */ | |
31b0b073 | 4318 | if (!intf->channels_ready) { |
9a2845c4 | 4319 | requeue = 0; /* Throw the message away */ |
4dec302f | 4320 | goto out; |
4321 | } | |
4322 | ||
31b0b073 CM |
4323 | chans = READ_ONCE(intf->channel_list)->c; |
4324 | ||
4325 | switch (chans[chan].medium) { | |
1da177e4 LT |
4326 | case IPMI_CHANNEL_MEDIUM_IPMB: |
4327 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
4328 | /* |
4329 | * It's a response, so find the | |
4330 | * requesting message and send it up. | |
4331 | */ | |
1da177e4 LT |
4332 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
4333 | } else { | |
c70d7499 CM |
4334 | /* |
4335 | * It's a command to the SMS from some other | |
4336 | * entity. Handle that. | |
4337 | */ | |
1da177e4 LT |
4338 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
4339 | } | |
4340 | break; | |
4341 | ||
4342 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
4343 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
4344 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
4345 | /* |
4346 | * It's a response, so find the | |
4347 | * requesting message and send it up. | |
4348 | */ | |
1da177e4 LT |
4349 | requeue = handle_lan_get_msg_rsp(intf, msg); |
4350 | } else { | |
c70d7499 CM |
4351 | /* |
4352 | * It's a command to the SMS from some other | |
4353 | * entity. Handle that. | |
4354 | */ | |
1da177e4 LT |
4355 | requeue = handle_lan_get_msg_cmd(intf, msg); |
4356 | } | |
4357 | break; | |
4358 | ||
4359 | default: | |
4dec302f | 4360 | /* Check for OEM Channels. Clients had better |
4361 | register for these commands. */ | |
31b0b073 CM |
4362 | if ((chans[chan].medium >= IPMI_CHANNEL_MEDIUM_OEM_MIN) |
4363 | && (chans[chan].medium | |
4dec302f | 4364 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { |
4365 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
4366 | } else { | |
4367 | /* | |
4368 | * We don't handle the channel type, so just | |
4369 | * free the message. | |
4370 | */ | |
4371 | requeue = 0; | |
4372 | } | |
1da177e4 LT |
4373 | } |
4374 | ||
4375 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 4376 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 4377 | /* It's an asynchronous event. */ |
1da177e4 LT |
4378 | requeue = handle_read_event_rsp(intf, msg); |
4379 | } else { | |
4380 | /* It's a response from the local BMC. */ | |
4381 | requeue = handle_bmc_rsp(intf, msg); | |
4382 | } | |
4383 | ||
4384 | out: | |
4385 | return requeue; | |
4386 | } | |
4387 | ||
7adf579c CM |
4388 | /* |
4389 | * If there are messages in the queue or pretimeouts, handle them. | |
4390 | */ | |
4391 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
4392 | { | |
4393 | struct ipmi_smi_msg *smi_msg; | |
4394 | unsigned long flags = 0; | |
4395 | int rv; | |
4396 | int run_to_completion = intf->run_to_completion; | |
4397 | ||
4398 | /* See if any waiting messages need to be processed. */ | |
4399 | if (!run_to_completion) | |
65be7544 CM |
4400 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
4401 | while (!list_empty(&intf->waiting_rcv_msgs)) { | |
4402 | smi_msg = list_entry(intf->waiting_rcv_msgs.next, | |
7adf579c | 4403 | struct ipmi_smi_msg, link); |
ae4ea9a2 | 4404 | list_del(&smi_msg->link); |
7adf579c | 4405 | if (!run_to_completion) |
65be7544 CM |
4406 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, |
4407 | flags); | |
7adf579c CM |
4408 | rv = handle_one_recv_msg(intf, smi_msg); |
4409 | if (!run_to_completion) | |
65be7544 | 4410 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
7ea0ed2b | 4411 | if (rv > 0) { |
7adf579c CM |
4412 | /* |
4413 | * To preserve message order, quit if we | |
ae4ea9a2 JN |
4414 | * can't handle a message. Add the message |
4415 | * back at the head, this is safe because this | |
4416 | * tasklet is the only thing that pulls the | |
4417 | * messages. | |
7adf579c | 4418 | */ |
ae4ea9a2 | 4419 | list_add(&smi_msg->link, &intf->waiting_rcv_msgs); |
7adf579c | 4420 | break; |
7ea0ed2b | 4421 | } else { |
7ea0ed2b CM |
4422 | if (rv == 0) |
4423 | /* Message handled */ | |
4424 | ipmi_free_smi_msg(smi_msg); | |
4425 | /* If rv < 0, fatal error, del but don't free. */ | |
7adf579c CM |
4426 | } |
4427 | } | |
4428 | if (!run_to_completion) | |
65be7544 | 4429 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, flags); |
7adf579c CM |
4430 | |
4431 | /* | |
4432 | * If the pretimout count is non-zero, decrement one from it and | |
4433 | * deliver pretimeouts to all the users. | |
4434 | */ | |
4435 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
4436 | ipmi_user_t user; | |
4437 | ||
4438 | rcu_read_lock(); | |
4439 | list_for_each_entry_rcu(user, &intf->users, link) { | |
4440 | if (user->handler->ipmi_watchdog_pretimeout) | |
4441 | user->handler->ipmi_watchdog_pretimeout( | |
4442 | user->handler_data); | |
4443 | } | |
4444 | rcu_read_unlock(); | |
4445 | } | |
4446 | } | |
4447 | ||
4448 | static void smi_recv_tasklet(unsigned long val) | |
4449 | { | |
7ea0ed2b CM |
4450 | unsigned long flags = 0; /* keep us warning-free. */ |
4451 | ipmi_smi_t intf = (ipmi_smi_t) val; | |
4452 | int run_to_completion = intf->run_to_completion; | |
4453 | struct ipmi_smi_msg *newmsg = NULL; | |
4454 | ||
4455 | /* | |
4456 | * Start the next message if available. | |
4457 | * | |
4458 | * Do this here, not in the actual receiver, because we may deadlock | |
4459 | * because the lower layer is allowed to hold locks while calling | |
4460 | * message delivery. | |
4461 | */ | |
cdea4656 TC |
4462 | |
4463 | rcu_read_lock(); | |
4464 | ||
7ea0ed2b CM |
4465 | if (!run_to_completion) |
4466 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
4467 | if (intf->curr_msg == NULL && !intf->in_shutdown) { | |
4468 | struct list_head *entry = NULL; | |
4469 | ||
4470 | /* Pick the high priority queue first. */ | |
4471 | if (!list_empty(&intf->hp_xmit_msgs)) | |
4472 | entry = intf->hp_xmit_msgs.next; | |
4473 | else if (!list_empty(&intf->xmit_msgs)) | |
4474 | entry = intf->xmit_msgs.next; | |
4475 | ||
4476 | if (entry) { | |
4477 | list_del(entry); | |
4478 | newmsg = list_entry(entry, struct ipmi_smi_msg, link); | |
4479 | intf->curr_msg = newmsg; | |
4480 | } | |
4481 | } | |
4482 | if (!run_to_completion) | |
4483 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
4484 | if (newmsg) | |
99ab32f3 | 4485 | intf->handlers->sender(intf->send_info, newmsg); |
7ea0ed2b | 4486 | |
cdea4656 TC |
4487 | rcu_read_unlock(); |
4488 | ||
7ea0ed2b | 4489 | handle_new_recv_msgs(intf); |
7adf579c CM |
4490 | } |
4491 | ||
1da177e4 LT |
4492 | /* Handle a new message from the lower layer. */ |
4493 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
4494 | struct ipmi_smi_msg *msg) | |
4495 | { | |
5956dce1 | 4496 | unsigned long flags = 0; /* keep us warning-free. */ |
7ea0ed2b | 4497 | int run_to_completion = intf->run_to_completion; |
1da177e4 | 4498 | |
1da177e4 LT |
4499 | if ((msg->data_size >= 2) |
4500 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
4501 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 | 4502 | && (msg->user_data == NULL)) { |
7ea0ed2b CM |
4503 | |
4504 | if (intf->in_shutdown) | |
4505 | goto free_msg; | |
4506 | ||
c70d7499 CM |
4507 | /* |
4508 | * This is the local response to a command send, start | |
4509 | * the timer for these. The user_data will not be | |
4510 | * NULL if this is a response send, and we will let | |
4511 | * response sends just go through. | |
4512 | */ | |
4513 | ||
4514 | /* | |
4515 | * Check for errors, if we get certain errors (ones | |
4516 | * that mean basically we can try again later), we | |
4517 | * ignore them and start the timer. Otherwise we | |
4518 | * report the error immediately. | |
4519 | */ | |
1da177e4 LT |
4520 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
4521 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
4522 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
4523 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 4524 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
31b0b073 CM |
4525 | int ch = msg->rsp[3] & 0xf; |
4526 | struct ipmi_channel *chans; | |
1da177e4 LT |
4527 | |
4528 | /* Got an error sending the message, handle it. */ | |
31b0b073 CM |
4529 | |
4530 | chans = READ_ONCE(intf->channel_list)->c; | |
4531 | if ((chans[ch].medium == IPMI_CHANNEL_MEDIUM_8023LAN) | |
4532 | || (chans[ch].medium == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 4533 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 4534 | else |
b2655f26 | 4535 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 4536 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 4537 | } else |
1da177e4 LT |
4538 | /* The message was sent, start the timer. */ |
4539 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 | 4540 | |
7ea0ed2b | 4541 | free_msg: |
1da177e4 | 4542 | ipmi_free_smi_msg(msg); |
7ea0ed2b CM |
4543 | } else { |
4544 | /* | |
4545 | * To preserve message order, we keep a queue and deliver from | |
4546 | * a tasklet. | |
4547 | */ | |
4548 | if (!run_to_completion) | |
4549 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); | |
4550 | list_add_tail(&msg->link, &intf->waiting_rcv_msgs); | |
4551 | if (!run_to_completion) | |
4552 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, | |
4553 | flags); | |
1da177e4 LT |
4554 | } |
4555 | ||
5956dce1 | 4556 | if (!run_to_completion) |
7ea0ed2b | 4557 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); |
b2234ee9 CM |
4558 | /* |
4559 | * We can get an asynchronous event or receive message in addition | |
4560 | * to commands we send. | |
4561 | */ | |
7ea0ed2b CM |
4562 | if (msg == intf->curr_msg) |
4563 | intf->curr_msg = NULL; | |
5956dce1 | 4564 | if (!run_to_completion) |
7ea0ed2b | 4565 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
c70d7499 | 4566 | |
7ea0ed2b CM |
4567 | if (run_to_completion) |
4568 | smi_recv_tasklet((unsigned long) intf); | |
4569 | else | |
4570 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4571 | } |
c70d7499 | 4572 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
4573 | |
4574 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
4575 | { | |
7ea0ed2b CM |
4576 | if (intf->in_shutdown) |
4577 | return; | |
4578 | ||
7adf579c CM |
4579 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
4580 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4581 | } |
c70d7499 | 4582 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 4583 | |
882fe011 CM |
4584 | static struct ipmi_smi_msg * |
4585 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
4586 | unsigned char seq, long seqid) | |
1da177e4 | 4587 | { |
882fe011 | 4588 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 4589 | if (!smi_msg) |
c70d7499 CM |
4590 | /* |
4591 | * If we can't allocate the message, then just return, we | |
4592 | * get 4 retries, so this should be ok. | |
4593 | */ | |
882fe011 | 4594 | return NULL; |
1da177e4 LT |
4595 | |
4596 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
4597 | smi_msg->data_size = recv_msg->msg.data_len; | |
4598 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 4599 | |
1da177e4 LT |
4600 | #ifdef DEBUG_MSGING |
4601 | { | |
4602 | int m; | |
4603 | printk("Resend: "); | |
e8b33617 | 4604 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4605 | printk(" %2.2x", smi_msg->data[m]); |
4606 | printk("\n"); | |
4607 | } | |
4608 | #endif | |
882fe011 | 4609 | return smi_msg; |
1da177e4 LT |
4610 | } |
4611 | ||
393d2cc3 | 4612 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
392a17b1 CM |
4613 | struct list_head *timeouts, |
4614 | unsigned long timeout_period, | |
89986496 CM |
4615 | int slot, unsigned long *flags, |
4616 | unsigned int *waiting_msgs) | |
393d2cc3 | 4617 | { |
b2c03941 | 4618 | struct ipmi_recv_msg *msg; |
81d02b7f | 4619 | const struct ipmi_smi_handlers *handlers; |
b2c03941 | 4620 | |
7ea0ed2b | 4621 | if (intf->in_shutdown) |
b2c03941 | 4622 | return; |
393d2cc3 CM |
4623 | |
4624 | if (!ent->inuse) | |
4625 | return; | |
4626 | ||
392a17b1 CM |
4627 | if (timeout_period < ent->timeout) { |
4628 | ent->timeout -= timeout_period; | |
89986496 | 4629 | (*waiting_msgs)++; |
393d2cc3 | 4630 | return; |
89986496 | 4631 | } |
393d2cc3 CM |
4632 | |
4633 | if (ent->retries_left == 0) { | |
4634 | /* The message has used all its retries. */ | |
4635 | ent->inuse = 0; | |
4636 | msg = ent->recv_msg; | |
4637 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4638 | if (ent->broadcast) |
b2655f26 | 4639 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4640 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4641 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4642 | else |
b2655f26 | 4643 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4644 | } else { |
4645 | struct ipmi_smi_msg *smi_msg; | |
4646 | /* More retries, send again. */ | |
4647 | ||
89986496 CM |
4648 | (*waiting_msgs)++; |
4649 | ||
c70d7499 CM |
4650 | /* |
4651 | * Start with the max timer, set to normal timer after | |
4652 | * the message is sent. | |
4653 | */ | |
393d2cc3 CM |
4654 | ent->timeout = MAX_MSG_TIMEOUT; |
4655 | ent->retries_left--; | |
393d2cc3 CM |
4656 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4657 | ent->seqid); | |
25176ed6 CM |
4658 | if (!smi_msg) { |
4659 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4660 | ipmi_inc_stat(intf, | |
4661 | dropped_rexmit_lan_commands); | |
4662 | else | |
4663 | ipmi_inc_stat(intf, | |
4664 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4665 | return; |
25176ed6 | 4666 | } |
393d2cc3 CM |
4667 | |
4668 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4669 | |
c70d7499 CM |
4670 | /* |
4671 | * Send the new message. We send with a zero | |
4672 | * priority. It timed out, I doubt time is that | |
4673 | * critical now, and high priority messages are really | |
4674 | * only for messages to the local MC, which don't get | |
4675 | * resent. | |
4676 | */ | |
b2c03941 | 4677 | handlers = intf->handlers; |
25176ed6 CM |
4678 | if (handlers) { |
4679 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4680 | ipmi_inc_stat(intf, | |
4681 | retransmitted_lan_commands); | |
4682 | else | |
4683 | ipmi_inc_stat(intf, | |
4684 | retransmitted_ipmb_commands); | |
4685 | ||
81d02b7f | 4686 | smi_send(intf, handlers, smi_msg, 0); |
25176ed6 | 4687 | } else |
b2c03941 CM |
4688 | ipmi_free_smi_msg(smi_msg); |
4689 | ||
393d2cc3 CM |
4690 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4691 | } | |
4692 | } | |
4693 | ||
392a17b1 CM |
4694 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, |
4695 | unsigned long timeout_period) | |
1da177e4 | 4696 | { |
1da177e4 LT |
4697 | struct list_head timeouts; |
4698 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4699 | unsigned long flags; |
bca0324d | 4700 | int i; |
89986496 | 4701 | unsigned int waiting_msgs = 0; |
1da177e4 | 4702 | |
c0734bd5 CM |
4703 | if (!intf->bmc_registered) { |
4704 | kref_get(&intf->refcount); | |
4705 | if (!schedule_work(&intf->bmc_reg_work)) { | |
4706 | kref_put(&intf->refcount, intf_free); | |
4707 | waiting_msgs++; | |
4708 | } | |
4709 | } | |
4710 | ||
89986496 CM |
4711 | /* |
4712 | * Go through the seq table and find any messages that | |
4713 | * have timed out, putting them in the timeouts | |
4714 | * list. | |
4715 | */ | |
4716 | INIT_LIST_HEAD(&timeouts); | |
4717 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4718 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4719 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4720 | &timeouts, timeout_period, i, | |
4721 | &flags, &waiting_msgs); | |
4722 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4723 | |
89986496 CM |
4724 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4725 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4726 | |
89986496 CM |
4727 | /* |
4728 | * Maintenance mode handling. Check the timeout | |
4729 | * optimistically before we claim the lock. It may | |
4730 | * mean a timeout gets missed occasionally, but that | |
4731 | * only means the timeout gets extended by one period | |
4732 | * in that case. No big deal, and it avoids the lock | |
4733 | * most of the time. | |
4734 | */ | |
4735 | if (intf->auto_maintenance_timeout > 0) { | |
4736 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4737 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4738 | intf->auto_maintenance_timeout |
4739 | -= timeout_period; | |
4740 | if (!intf->maintenance_mode | |
4741 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4742 | intf->maintenance_mode_enable = false; |
89986496 | 4743 | maintenance_mode_update(intf); |
b9675136 | 4744 | } |
b9675136 | 4745 | } |
89986496 CM |
4746 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4747 | flags); | |
1da177e4 | 4748 | } |
89986496 CM |
4749 | |
4750 | tasklet_schedule(&intf->recv_tasklet); | |
4751 | ||
4752 | return waiting_msgs; | |
1da177e4 LT |
4753 | } |
4754 | ||
89986496 | 4755 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4756 | { |
89986496 CM |
4757 | /* No event requests when in maintenance mode. */ |
4758 | if (intf->maintenance_mode_enable) | |
4759 | return; | |
b9675136 | 4760 | |
7ea0ed2b CM |
4761 | if (!intf->in_shutdown) |
4762 | intf->handlers->request_events(intf->send_info); | |
1da177e4 LT |
4763 | } |
4764 | ||
4765 | static struct timer_list ipmi_timer; | |
4766 | ||
8f43f84f | 4767 | static atomic_t stop_operation; |
1da177e4 | 4768 | |
e99e88a9 | 4769 | static void ipmi_timeout(struct timer_list *unused) |
1da177e4 | 4770 | { |
89986496 CM |
4771 | ipmi_smi_t intf; |
4772 | int nt = 0; | |
4773 | ||
8f43f84f | 4774 | if (atomic_read(&stop_operation)) |
1da177e4 | 4775 | return; |
1da177e4 | 4776 | |
89986496 CM |
4777 | rcu_read_lock(); |
4778 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4779 | int lnt = 0; | |
4780 | ||
4781 | if (atomic_read(&intf->event_waiters)) { | |
4782 | intf->ticks_to_req_ev--; | |
4783 | if (intf->ticks_to_req_ev == 0) { | |
4784 | ipmi_request_event(intf); | |
4785 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4786 | } | |
4787 | lnt++; | |
4788 | } | |
4789 | ||
4790 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4791 | |
89986496 CM |
4792 | lnt = !!lnt; |
4793 | if (lnt != intf->last_needs_timer && | |
4794 | intf->handlers->set_need_watch) | |
4795 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4796 | intf->last_needs_timer = lnt; | |
1da177e4 | 4797 | |
89986496 CM |
4798 | nt += lnt; |
4799 | } | |
4800 | rcu_read_unlock(); | |
4801 | ||
4802 | if (nt) | |
4803 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4804 | } |
4805 | ||
89986496 CM |
4806 | static void need_waiter(ipmi_smi_t intf) |
4807 | { | |
4808 | /* Racy, but worst case we start the timer twice. */ | |
4809 | if (!timer_pending(&ipmi_timer)) | |
4810 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4811 | } | |
1da177e4 LT |
4812 | |
4813 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4814 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4815 | ||
1da177e4 LT |
4816 | static void free_smi_msg(struct ipmi_smi_msg *msg) |
4817 | { | |
4818 | atomic_dec(&smi_msg_inuse_count); | |
4819 | kfree(msg); | |
4820 | } | |
4821 | ||
4822 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4823 | { | |
4824 | struct ipmi_smi_msg *rv; | |
4825 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4826 | if (rv) { | |
4827 | rv->done = free_smi_msg; | |
4828 | rv->user_data = NULL; | |
4829 | atomic_inc(&smi_msg_inuse_count); | |
4830 | } | |
4831 | return rv; | |
4832 | } | |
c70d7499 | 4833 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4834 | |
4835 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4836 | { | |
4837 | atomic_dec(&recv_msg_inuse_count); | |
4838 | kfree(msg); | |
4839 | } | |
4840 | ||
74006309 | 4841 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4842 | { |
4843 | struct ipmi_recv_msg *rv; | |
4844 | ||
4845 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4846 | if (rv) { | |
a9eec556 | 4847 | rv->user = NULL; |
1da177e4 LT |
4848 | rv->done = free_recv_msg; |
4849 | atomic_inc(&recv_msg_inuse_count); | |
4850 | } | |
4851 | return rv; | |
4852 | } | |
4853 | ||
393d2cc3 CM |
4854 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4855 | { | |
4856 | if (msg->user) | |
4857 | kref_put(&msg->user->refcount, free_user); | |
4858 | msg->done(msg); | |
4859 | } | |
c70d7499 | 4860 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4861 | |
895dcfd1 CM |
4862 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4863 | ||
1da177e4 LT |
4864 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4865 | { | |
895dcfd1 | 4866 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4867 | } |
4868 | ||
4869 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4870 | { | |
895dcfd1 CM |
4871 | atomic_dec(&panic_done_count); |
4872 | } | |
4873 | ||
4874 | /* | |
4875 | * Inside a panic, send a message and wait for a response. | |
4876 | */ | |
4877 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4878 | struct ipmi_addr *addr, | |
4879 | struct kernel_ipmi_msg *msg) | |
4880 | { | |
4881 | struct ipmi_smi_msg smi_msg; | |
4882 | struct ipmi_recv_msg recv_msg; | |
4883 | int rv; | |
4884 | ||
4885 | smi_msg.done = dummy_smi_done_handler; | |
4886 | recv_msg.done = dummy_recv_done_handler; | |
4887 | atomic_add(2, &panic_done_count); | |
4888 | rv = i_ipmi_request(NULL, | |
4889 | intf, | |
4890 | addr, | |
4891 | 0, | |
4892 | msg, | |
4893 | intf, | |
4894 | &smi_msg, | |
4895 | &recv_msg, | |
4896 | 0, | |
5fdb1fb2 CM |
4897 | intf->addrinfo[0].address, |
4898 | intf->addrinfo[0].lun, | |
895dcfd1 CM |
4899 | 0, 1); /* Don't retry, and don't wait. */ |
4900 | if (rv) | |
4901 | atomic_sub(2, &panic_done_count); | |
82802f96 HK |
4902 | else if (intf->handlers->flush_messages) |
4903 | intf->handlers->flush_messages(intf->send_info); | |
4904 | ||
895dcfd1 CM |
4905 | while (atomic_read(&panic_done_count) != 0) |
4906 | ipmi_poll(intf); | |
1da177e4 LT |
4907 | } |
4908 | ||
56a55ec6 | 4909 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4910 | { |
56a55ec6 CM |
4911 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4912 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4913 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4914 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4915 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4916 | intf->event_receiver = msg->msg.data[1]; |
4917 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4918 | } |
4919 | } | |
4920 | ||
56a55ec6 | 4921 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4922 | { |
56a55ec6 CM |
4923 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4924 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4925 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4926 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4927 | /* | |
4928 | * A get device id command, save if we are an event | |
4929 | * receiver or generator. | |
4930 | */ | |
56a55ec6 CM |
4931 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4932 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4933 | } |
4934 | } | |
1da177e4 LT |
4935 | |
4936 | static void send_panic_events(char *str) | |
4937 | { | |
4938 | struct kernel_ipmi_msg msg; | |
4939 | ipmi_smi_t intf; | |
4940 | unsigned char data[16]; | |
1da177e4 LT |
4941 | struct ipmi_system_interface_addr *si; |
4942 | struct ipmi_addr addr; | |
1da177e4 | 4943 | |
1c9f98d1 CM |
4944 | if (ipmi_send_panic_event == IPMI_SEND_PANIC_EVENT_NONE) |
4945 | return; | |
4946 | ||
1da177e4 LT |
4947 | si = (struct ipmi_system_interface_addr *) &addr; |
4948 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4949 | si->channel = IPMI_BMC_CHANNEL; | |
4950 | si->lun = 0; | |
4951 | ||
4952 | /* Fill in an event telling that we have failed. */ | |
4953 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4954 | msg.cmd = 2; /* Platform event command. */ | |
4955 | msg.data = data; | |
4956 | msg.data_len = 8; | |
cda315ab | 4957 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4958 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4959 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4960 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4961 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4962 | ||
c70d7499 CM |
4963 | /* |
4964 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4965 | * to make the panic events more useful. | |
4966 | */ | |
1da177e4 LT |
4967 | if (str) { |
4968 | data[3] = str[0]; | |
4969 | data[6] = str[1]; | |
4970 | data[7] = str[2]; | |
4971 | } | |
4972 | ||
1da177e4 | 4973 | /* For every registered interface, send the event. */ |
bca0324d | 4974 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
1c9f98d1 CM |
4975 | if (!intf->handlers || !intf->handlers->poll) |
4976 | /* Interface is not ready or can't run at panic time. */ | |
1da177e4 LT |
4977 | continue; |
4978 | ||
4979 | /* Send the event announcing the panic. */ | |
895dcfd1 | 4980 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4981 | } |
4982 | ||
c70d7499 CM |
4983 | /* |
4984 | * On every interface, dump a bunch of OEM event holding the | |
4985 | * string. | |
4986 | */ | |
1c9f98d1 | 4987 | if (ipmi_send_panic_event != IPMI_SEND_PANIC_EVENT_STRING || !str) |
1da177e4 LT |
4988 | return; |
4989 | ||
bca0324d CM |
4990 | /* For every registered interface, send the event. */ |
4991 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4992 | char *p = str; |
4993 | struct ipmi_ipmb_addr *ipmb; | |
4994 | int j; | |
4995 | ||
bca0324d CM |
4996 | if (intf->intf_num == -1) |
4997 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4998 | continue; |
4999 | ||
78ba2faf CM |
5000 | /* |
5001 | * intf_num is used as an marker to tell if the | |
5002 | * interface is valid. Thus we need a read barrier to | |
5003 | * make sure data fetched before checking intf_num | |
5004 | * won't be used. | |
5005 | */ | |
5006 | smp_rmb(); | |
5007 | ||
c70d7499 CM |
5008 | /* |
5009 | * First job here is to figure out where to send the | |
5010 | * OEM events. There's no way in IPMI to send OEM | |
5011 | * events using an event send command, so we have to | |
5012 | * find the SEL to put them in and stick them in | |
5013 | * there. | |
5014 | */ | |
1da177e4 LT |
5015 | |
5016 | /* Get capabilities from the get device id. */ | |
5017 | intf->local_sel_device = 0; | |
5018 | intf->local_event_generator = 0; | |
5019 | intf->event_receiver = 0; | |
5020 | ||
5021 | /* Request the device info from the local MC. */ | |
5022 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
5023 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
5024 | msg.data = NULL; | |
5025 | msg.data_len = 0; | |
5026 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 5027 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
5028 | |
5029 | if (intf->local_event_generator) { | |
5030 | /* Request the event receiver from the local MC. */ | |
5031 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
5032 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
5033 | msg.data = NULL; | |
5034 | msg.data_len = 0; | |
5035 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 5036 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
5037 | } |
5038 | intf->null_user_handler = NULL; | |
5039 | ||
c70d7499 CM |
5040 | /* |
5041 | * Validate the event receiver. The low bit must not | |
5042 | * be 1 (it must be a valid IPMB address), it cannot | |
5043 | * be zero, and it must not be my address. | |
5044 | */ | |
5045 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 5046 | && (intf->event_receiver != 0) |
5fdb1fb2 | 5047 | && (intf->event_receiver != intf->addrinfo[0].address)) { |
c70d7499 CM |
5048 | /* |
5049 | * The event receiver is valid, send an IPMB | |
5050 | * message. | |
5051 | */ | |
1da177e4 LT |
5052 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
5053 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
5054 | ipmb->channel = 0; /* FIXME - is this right? */ | |
5055 | ipmb->lun = intf->event_receiver_lun; | |
5056 | ipmb->slave_addr = intf->event_receiver; | |
5057 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
5058 | /* |
5059 | * The event receiver was not valid (or was | |
5060 | * me), but I am an SEL device, just dump it | |
5061 | * in my SEL. | |
5062 | */ | |
1da177e4 LT |
5063 | si = (struct ipmi_system_interface_addr *) &addr; |
5064 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
5065 | si->channel = IPMI_BMC_CHANNEL; | |
5066 | si->lun = 0; | |
5067 | } else | |
5068 | continue; /* No where to send the event. */ | |
5069 | ||
1da177e4 LT |
5070 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
5071 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
5072 | msg.data = data; | |
5073 | msg.data_len = 16; | |
5074 | ||
5075 | j = 0; | |
5076 | while (*p) { | |
5077 | int size = strlen(p); | |
5078 | ||
5079 | if (size > 11) | |
5080 | size = 11; | |
5081 | data[0] = 0; | |
5082 | data[1] = 0; | |
5083 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
5fdb1fb2 | 5084 | data[3] = intf->addrinfo[0].address; |
1da177e4 | 5085 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
5086 | /* |
5087 | * Always give 11 bytes, so strncpy will fill | |
5088 | * it with zeroes for me. | |
5089 | */ | |
1da177e4 LT |
5090 | strncpy(data+5, p, 11); |
5091 | p += size; | |
5092 | ||
895dcfd1 | 5093 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 5094 | } |
c70d7499 | 5095 | } |
1da177e4 | 5096 | } |
1da177e4 | 5097 | |
0c8204b3 | 5098 | static int has_panicked; |
1da177e4 LT |
5099 | |
5100 | static int panic_event(struct notifier_block *this, | |
5101 | unsigned long event, | |
c70d7499 | 5102 | void *ptr) |
1da177e4 | 5103 | { |
1da177e4 LT |
5104 | ipmi_smi_t intf; |
5105 | ||
f18190bd | 5106 | if (has_panicked) |
1da177e4 | 5107 | return NOTIFY_DONE; |
f18190bd | 5108 | has_panicked = 1; |
1da177e4 LT |
5109 | |
5110 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 5111 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
5112 | if (!intf->handlers) |
5113 | /* Interface is not ready. */ | |
1da177e4 LT |
5114 | continue; |
5115 | ||
06e5e345 HK |
5116 | /* |
5117 | * If we were interrupted while locking xmit_msgs_lock or | |
5118 | * waiting_rcv_msgs_lock, the corresponding list may be | |
5119 | * corrupted. In this case, drop items on the list for | |
5120 | * the safety. | |
5121 | */ | |
5122 | if (!spin_trylock(&intf->xmit_msgs_lock)) { | |
5123 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
5124 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
5125 | } else | |
5126 | spin_unlock(&intf->xmit_msgs_lock); | |
5127 | ||
5128 | if (!spin_trylock(&intf->waiting_rcv_msgs_lock)) | |
5129 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
5130 | else | |
5131 | spin_unlock(&intf->waiting_rcv_msgs_lock); | |
5132 | ||
5956dce1 | 5133 | intf->run_to_completion = 1; |
1c9f98d1 CM |
5134 | if (intf->handlers->set_run_to_completion) |
5135 | intf->handlers->set_run_to_completion(intf->send_info, | |
5136 | 1); | |
1da177e4 LT |
5137 | } |
5138 | ||
1da177e4 | 5139 | send_panic_events(ptr); |
1da177e4 LT |
5140 | |
5141 | return NOTIFY_DONE; | |
5142 | } | |
5143 | ||
5144 | static struct notifier_block panic_block = { | |
5145 | .notifier_call = panic_event, | |
5146 | .next = NULL, | |
5147 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
5148 | }; | |
5149 | ||
5150 | static int ipmi_init_msghandler(void) | |
5151 | { | |
50c812b2 | 5152 | int rv; |
1da177e4 LT |
5153 | |
5154 | if (initialized) | |
5155 | return 0; | |
5156 | ||
fe2d5ffc | 5157 | rv = driver_register(&ipmidriver.driver); |
50c812b2 | 5158 | if (rv) { |
106a8461 | 5159 | pr_err(PFX "Could not register IPMI driver\n"); |
50c812b2 CM |
5160 | return rv; |
5161 | } | |
5162 | ||
106a8461 | 5163 | pr_info("ipmi message handler version " IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 5164 | |
55f91cb6 | 5165 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
1da177e4 LT |
5166 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
5167 | if (!proc_ipmi_root) { | |
106a8461 | 5168 | pr_err(PFX "Unable to create IPMI proc dir"); |
80fad5b9 | 5169 | driver_unregister(&ipmidriver.driver); |
1da177e4 LT |
5170 | return -ENOMEM; |
5171 | } | |
5172 | ||
55f91cb6 | 5173 | #endif /* CONFIG_IPMI_PROC_INTERFACE */ |
1da177e4 | 5174 | |
e99e88a9 | 5175 | timer_setup(&ipmi_timer, ipmi_timeout, 0); |
409035e0 | 5176 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); |
1da177e4 | 5177 | |
e041c683 | 5178 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
5179 | |
5180 | initialized = 1; | |
5181 | ||
5182 | return 0; | |
5183 | } | |
5184 | ||
60ee6d5f | 5185 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
5186 | { |
5187 | ipmi_init_msghandler(); | |
5188 | return 0; | |
5189 | } | |
5190 | ||
60ee6d5f | 5191 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
5192 | { |
5193 | int count; | |
5194 | ||
5195 | if (!initialized) | |
5196 | return; | |
5197 | ||
e041c683 | 5198 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 5199 | |
c70d7499 CM |
5200 | /* |
5201 | * This can't be called if any interfaces exist, so no worry | |
5202 | * about shutting down the interfaces. | |
5203 | */ | |
1da177e4 | 5204 | |
c70d7499 CM |
5205 | /* |
5206 | * Tell the timer to stop, then wait for it to stop. This | |
5207 | * avoids problems with race conditions removing the timer | |
5208 | * here. | |
5209 | */ | |
8f43f84f CM |
5210 | atomic_inc(&stop_operation); |
5211 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 5212 | |
55f91cb6 | 5213 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
a8ca16ea | 5214 | proc_remove(proc_ipmi_root); |
55f91cb6 | 5215 | #endif /* CONFIG_IPMI_PROC_INTERFACE */ |
1da177e4 | 5216 | |
fe2d5ffc | 5217 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 5218 | |
1da177e4 LT |
5219 | initialized = 0; |
5220 | ||
5221 | /* Check for buffer leaks. */ | |
5222 | count = atomic_read(&smi_msg_inuse_count); | |
5223 | if (count != 0) | |
106a8461 | 5224 | pr_warn(PFX "SMI message count %d at exit\n", count); |
1da177e4 LT |
5225 | count = atomic_read(&recv_msg_inuse_count); |
5226 | if (count != 0) | |
106a8461 | 5227 | pr_warn(PFX "recv message count %d at exit\n", count); |
1da177e4 LT |
5228 | } |
5229 | module_exit(cleanup_ipmi); | |
5230 | ||
5231 | module_init(ipmi_init_msghandler_mod); | |
5232 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 5233 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
5234 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
5235 | " interface."); | |
1fdd75bd | 5236 | MODULE_VERSION(IPMI_DRIVER_VERSION); |
070cbd1d | 5237 | MODULE_SOFTDEP("post: ipmi_devintf"); |