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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> |
1da177e4 LT |
49 | |
50 | #define PFX "IPMI message handler: " | |
1fdd75bd | 51 | |
f7caa1b5 | 52 | #define IPMI_DRIVER_VERSION "39.2" |
1da177e4 LT |
53 | |
54 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); | |
55 | static int ipmi_init_msghandler(void); | |
7adf579c CM |
56 | static void smi_recv_tasklet(unsigned long); |
57 | static void handle_new_recv_msgs(ipmi_smi_t intf); | |
89986496 | 58 | static void need_waiter(ipmi_smi_t intf); |
1da177e4 | 59 | |
0c8204b3 | 60 | static int initialized; |
1da177e4 | 61 | |
3b625943 | 62 | #ifdef CONFIG_PROC_FS |
0c8204b3 | 63 | static struct proc_dir_entry *proc_ipmi_root; |
3b625943 | 64 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 65 | |
b9675136 CM |
66 | /* Remain in auto-maintenance mode for this amount of time (in ms). */ |
67 | #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000 | |
68 | ||
1da177e4 LT |
69 | #define MAX_EVENTS_IN_QUEUE 25 |
70 | ||
c70d7499 CM |
71 | /* |
72 | * Don't let a message sit in a queue forever, always time it with at lest | |
73 | * the max message timer. This is in milliseconds. | |
74 | */ | |
1da177e4 LT |
75 | #define MAX_MSG_TIMEOUT 60000 |
76 | ||
89986496 CM |
77 | /* Call every ~1000 ms. */ |
78 | #define IPMI_TIMEOUT_TIME 1000 | |
79 | ||
80 | /* How many jiffies does it take to get to the timeout time. */ | |
81 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
82 | ||
83 | /* | |
84 | * Request events from the queue every second (this is the number of | |
85 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
86 | * future, IPMI will add a way to know immediately if an event is in | |
87 | * the queue and this silliness can go away. | |
88 | */ | |
89 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
90 | ||
393d2cc3 CM |
91 | /* |
92 | * The main "user" data structure. | |
93 | */ | |
c70d7499 | 94 | struct ipmi_user { |
1da177e4 LT |
95 | struct list_head link; |
96 | ||
7aefac26 CM |
97 | /* Set to false when the user is destroyed. */ |
98 | bool valid; | |
393d2cc3 CM |
99 | |
100 | struct kref refcount; | |
101 | ||
1da177e4 LT |
102 | /* The upper layer that handles receive messages. */ |
103 | struct ipmi_user_hndl *handler; | |
104 | void *handler_data; | |
105 | ||
106 | /* The interface this user is bound to. */ | |
107 | ipmi_smi_t intf; | |
108 | ||
109 | /* Does this interface receive IPMI events? */ | |
89986496 | 110 | bool gets_events; |
1da177e4 LT |
111 | }; |
112 | ||
c70d7499 | 113 | struct cmd_rcvr { |
1da177e4 LT |
114 | struct list_head link; |
115 | ||
116 | ipmi_user_t user; | |
117 | unsigned char netfn; | |
118 | unsigned char cmd; | |
c69c3127 | 119 | unsigned int chans; |
393d2cc3 CM |
120 | |
121 | /* | |
122 | * This is used to form a linked lised during mass deletion. | |
123 | * Since this is in an RCU list, we cannot use the link above | |
124 | * or change any data until the RCU period completes. So we | |
125 | * use this next variable during mass deletion so we can have | |
126 | * a list and don't have to wait and restart the search on | |
c70d7499 CM |
127 | * every individual deletion of a command. |
128 | */ | |
393d2cc3 | 129 | struct cmd_rcvr *next; |
1da177e4 LT |
130 | }; |
131 | ||
c70d7499 | 132 | struct seq_table { |
1da177e4 LT |
133 | unsigned int inuse : 1; |
134 | unsigned int broadcast : 1; | |
135 | ||
136 | unsigned long timeout; | |
137 | unsigned long orig_timeout; | |
138 | unsigned int retries_left; | |
139 | ||
c70d7499 CM |
140 | /* |
141 | * To verify on an incoming send message response that this is | |
142 | * the message that the response is for, we keep a sequence id | |
143 | * and increment it every time we send a message. | |
144 | */ | |
1da177e4 LT |
145 | long seqid; |
146 | ||
c70d7499 CM |
147 | /* |
148 | * This is held so we can properly respond to the message on a | |
149 | * timeout, and it is used to hold the temporary data for | |
150 | * retransmission, too. | |
151 | */ | |
1da177e4 LT |
152 | struct ipmi_recv_msg *recv_msg; |
153 | }; | |
154 | ||
c70d7499 CM |
155 | /* |
156 | * Store the information in a msgid (long) to allow us to find a | |
157 | * sequence table entry from the msgid. | |
158 | */ | |
1da177e4 LT |
159 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) |
160 | ||
161 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
162 | do { \ | |
163 | seq = ((msgid >> 26) & 0x3f); \ | |
164 | seqid = (msgid & 0x3fffff); \ | |
c70d7499 | 165 | } while (0) |
1da177e4 LT |
166 | |
167 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) | |
168 | ||
c70d7499 | 169 | struct ipmi_channel { |
1da177e4 LT |
170 | unsigned char medium; |
171 | unsigned char protocol; | |
c14979b9 | 172 | |
c70d7499 CM |
173 | /* |
174 | * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
175 | * but may be changed by the user. | |
176 | */ | |
c14979b9 CM |
177 | unsigned char address; |
178 | ||
c70d7499 CM |
179 | /* |
180 | * My LUN. This should generally stay the SMS LUN, but just in | |
181 | * case... | |
182 | */ | |
c14979b9 | 183 | unsigned char lun; |
1da177e4 LT |
184 | }; |
185 | ||
3b625943 | 186 | #ifdef CONFIG_PROC_FS |
c70d7499 | 187 | struct ipmi_proc_entry { |
1da177e4 LT |
188 | char *name; |
189 | struct ipmi_proc_entry *next; | |
190 | }; | |
3b625943 | 191 | #endif |
1da177e4 | 192 | |
c70d7499 | 193 | struct bmc_device { |
50c812b2 CM |
194 | struct platform_device *dev; |
195 | struct ipmi_device_id id; | |
196 | unsigned char guid[16]; | |
197 | int guid_set; | |
198 | ||
199 | struct kref refcount; | |
200 | ||
201 | /* bmc device attributes */ | |
202 | struct device_attribute device_id_attr; | |
203 | struct device_attribute provides_dev_sdrs_attr; | |
204 | struct device_attribute revision_attr; | |
205 | struct device_attribute firmware_rev_attr; | |
206 | struct device_attribute version_attr; | |
207 | struct device_attribute add_dev_support_attr; | |
208 | struct device_attribute manufacturer_id_attr; | |
209 | struct device_attribute product_id_attr; | |
210 | struct device_attribute guid_attr; | |
211 | struct device_attribute aux_firmware_rev_attr; | |
212 | }; | |
213 | ||
b2655f26 KB |
214 | /* |
215 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
216 | * structure. | |
217 | */ | |
73f2bdb9 CM |
218 | enum ipmi_stat_indexes { |
219 | /* Commands we got from the user that were invalid. */ | |
220 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 221 | |
73f2bdb9 CM |
222 | /* Commands we sent to the MC. */ |
223 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 224 | |
73f2bdb9 CM |
225 | /* Responses from the MC that were delivered to a user. */ |
226 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 227 | |
73f2bdb9 CM |
228 | /* Responses from the MC that were not delivered to a user. */ |
229 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 230 | |
73f2bdb9 CM |
231 | /* Commands we sent out to the IPMB bus. */ |
232 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 233 | |
73f2bdb9 CM |
234 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
235 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 236 | |
73f2bdb9 CM |
237 | /* Each retransmit increments this count. */ |
238 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 239 | |
73f2bdb9 CM |
240 | /* |
241 | * When a message times out (runs out of retransmits) this is | |
242 | * incremented. | |
243 | */ | |
244 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 245 | |
73f2bdb9 CM |
246 | /* |
247 | * This is like above, but for broadcasts. Broadcasts are | |
248 | * *not* included in the above count (they are expected to | |
249 | * time out). | |
250 | */ | |
251 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 252 | |
73f2bdb9 CM |
253 | /* Responses I have sent to the IPMB bus. */ |
254 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 255 | |
73f2bdb9 CM |
256 | /* The response was delivered to the user. */ |
257 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 258 | |
73f2bdb9 CM |
259 | /* The response had invalid data in it. */ |
260 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 261 | |
73f2bdb9 CM |
262 | /* The response didn't have anyone waiting for it. */ |
263 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 264 | |
73f2bdb9 CM |
265 | /* Commands we sent out to the IPMB bus. */ |
266 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 267 | |
73f2bdb9 CM |
268 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
269 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 270 | |
73f2bdb9 CM |
271 | /* Each retransmit increments this count. */ |
272 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 273 | |
73f2bdb9 CM |
274 | /* |
275 | * When a message times out (runs out of retransmits) this is | |
276 | * incremented. | |
277 | */ | |
278 | IPMI_STAT_timed_out_lan_commands, | |
279 | ||
280 | /* Responses I have sent to the IPMB bus. */ | |
281 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 282 | |
73f2bdb9 CM |
283 | /* The response was delivered to the user. */ |
284 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 285 | |
73f2bdb9 CM |
286 | /* The response had invalid data in it. */ |
287 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 288 | |
73f2bdb9 CM |
289 | /* The response didn't have anyone waiting for it. */ |
290 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 291 | |
73f2bdb9 CM |
292 | /* The command was delivered to the user. */ |
293 | IPMI_STAT_handled_commands, | |
b2655f26 | 294 | |
73f2bdb9 CM |
295 | /* The command had invalid data in it. */ |
296 | IPMI_STAT_invalid_commands, | |
b2655f26 | 297 | |
73f2bdb9 CM |
298 | /* The command didn't have anyone waiting for it. */ |
299 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 300 | |
73f2bdb9 CM |
301 | /* Invalid data in an event. */ |
302 | IPMI_STAT_invalid_events, | |
b2655f26 | 303 | |
73f2bdb9 CM |
304 | /* Events that were received with the proper format. */ |
305 | IPMI_STAT_events, | |
b2655f26 | 306 | |
25176ed6 CM |
307 | /* Retransmissions on IPMB that failed. */ |
308 | IPMI_STAT_dropped_rexmit_ipmb_commands, | |
309 | ||
310 | /* Retransmissions on LAN that failed. */ | |
311 | IPMI_STAT_dropped_rexmit_lan_commands, | |
b2655f26 | 312 | |
73f2bdb9 CM |
313 | /* This *must* remain last, add new values above this. */ |
314 | IPMI_NUM_STATS | |
315 | }; | |
b2655f26 KB |
316 | |
317 | ||
1da177e4 | 318 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 319 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 320 | struct ipmi_smi { |
1da177e4 LT |
321 | /* What interface number are we? */ |
322 | int intf_num; | |
323 | ||
393d2cc3 CM |
324 | struct kref refcount; |
325 | ||
bca0324d CM |
326 | /* Used for a list of interfaces. */ |
327 | struct list_head link; | |
328 | ||
c70d7499 CM |
329 | /* |
330 | * The list of upper layers that are using me. seq_lock | |
331 | * protects this. | |
332 | */ | |
393d2cc3 | 333 | struct list_head users; |
1da177e4 | 334 | |
b2c03941 CM |
335 | /* Information to supply to users. */ |
336 | unsigned char ipmi_version_major; | |
337 | unsigned char ipmi_version_minor; | |
338 | ||
1da177e4 LT |
339 | /* Used for wake ups at startup. */ |
340 | wait_queue_head_t waitq; | |
341 | ||
50c812b2 CM |
342 | struct bmc_device *bmc; |
343 | char *my_dev_name; | |
759643b8 | 344 | char *sysfs_name; |
1da177e4 | 345 | |
c70d7499 CM |
346 | /* |
347 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
348 | * must either be holding the ipmi_interfaces_mutex or be in |
349 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
350 | * value into a local variable and make sure it is not NULL. |
351 | */ | |
1da177e4 LT |
352 | struct ipmi_smi_handlers *handlers; |
353 | void *send_info; | |
354 | ||
3b625943 | 355 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
356 | /* A list of proc entries for this interface. */ |
357 | struct mutex proc_entry_lock; | |
1da177e4 | 358 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 359 | #endif |
1da177e4 | 360 | |
50c812b2 CM |
361 | /* Driver-model device for the system interface. */ |
362 | struct device *si_dev; | |
363 | ||
c70d7499 CM |
364 | /* |
365 | * A table of sequence numbers for this interface. We use the | |
366 | * sequence numbers for IPMB messages that go out of the | |
367 | * interface to match them up with their responses. A routine | |
368 | * is called periodically to time the items in this list. | |
369 | */ | |
1da177e4 LT |
370 | spinlock_t seq_lock; |
371 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
372 | int curr_seq; | |
373 | ||
c70d7499 | 374 | /* |
7adf579c CM |
375 | * Messages queued for delivery. If delivery fails (out of memory |
376 | * for instance), They will stay in here to be processed later in a | |
377 | * periodic timer interrupt. The tasklet is for handling received | |
378 | * messages directly from the handler. | |
c70d7499 | 379 | */ |
1da177e4 LT |
380 | spinlock_t waiting_msgs_lock; |
381 | struct list_head waiting_msgs; | |
7adf579c CM |
382 | atomic_t watchdog_pretimeouts_to_deliver; |
383 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 384 | |
c70d7499 CM |
385 | /* |
386 | * The list of command receivers that are registered for commands | |
387 | * on this interface. | |
388 | */ | |
d6dfd131 | 389 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
390 | struct list_head cmd_rcvrs; |
391 | ||
c70d7499 CM |
392 | /* |
393 | * Events that were queues because no one was there to receive | |
394 | * them. | |
395 | */ | |
1da177e4 LT |
396 | spinlock_t events_lock; /* For dealing with event stuff. */ |
397 | struct list_head waiting_events; | |
398 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
399 | char delivering_events; |
400 | char event_msg_printed; | |
89986496 CM |
401 | atomic_t event_waiters; |
402 | unsigned int ticks_to_req_ev; | |
403 | int last_needs_timer; | |
1da177e4 | 404 | |
c70d7499 CM |
405 | /* |
406 | * The event receiver for my BMC, only really used at panic | |
407 | * shutdown as a place to store this. | |
408 | */ | |
1da177e4 LT |
409 | unsigned char event_receiver; |
410 | unsigned char event_receiver_lun; | |
411 | unsigned char local_sel_device; | |
412 | unsigned char local_event_generator; | |
413 | ||
b9675136 CM |
414 | /* For handling of maintenance mode. */ |
415 | int maintenance_mode; | |
7aefac26 | 416 | bool maintenance_mode_enable; |
b9675136 CM |
417 | int auto_maintenance_timeout; |
418 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
419 | ||
c70d7499 CM |
420 | /* |
421 | * A cheap hack, if this is non-null and a message to an | |
422 | * interface comes in with a NULL user, call this routine with | |
423 | * it. Note that the message will still be freed by the | |
424 | * caller. This only works on the system interface. | |
425 | */ | |
56a55ec6 | 426 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 427 | |
c70d7499 CM |
428 | /* |
429 | * When we are scanning the channels for an SMI, this will | |
430 | * tell which channel we are scanning. | |
431 | */ | |
1da177e4 LT |
432 | int curr_channel; |
433 | ||
434 | /* Channel information */ | |
435 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
436 | ||
437 | /* Proc FS stuff. */ | |
438 | struct proc_dir_entry *proc_dir; | |
439 | char proc_dir_name[10]; | |
440 | ||
b2655f26 | 441 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
442 | |
443 | /* | |
444 | * run_to_completion duplicate of smb_info, smi_info | |
445 | * and ipmi_serial_info structures. Used to decrease numbers of | |
446 | * parameters passed by "low" level IPMI code. | |
447 | */ | |
448 | int run_to_completion; | |
1da177e4 | 449 | }; |
50c812b2 | 450 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 451 | |
50c812b2 CM |
452 | /** |
453 | * The driver model view of the IPMI messaging driver. | |
454 | */ | |
fe2d5ffc DW |
455 | static struct platform_driver ipmidriver = { |
456 | .driver = { | |
457 | .name = "ipmi", | |
458 | .bus = &platform_bus_type | |
459 | } | |
50c812b2 CM |
460 | }; |
461 | static DEFINE_MUTEX(ipmidriver_mutex); | |
462 | ||
bed9759b | 463 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 464 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 465 | |
c70d7499 CM |
466 | /* |
467 | * List of watchers that want to know when smi's are added and deleted. | |
468 | */ | |
bed9759b | 469 | static LIST_HEAD(smi_watchers); |
b2c03941 | 470 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 471 | |
b2655f26 KB |
472 | #define ipmi_inc_stat(intf, stat) \ |
473 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
474 | #define ipmi_get_stat(intf, stat) \ | |
475 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
476 | ||
25176ed6 CM |
477 | static int is_lan_addr(struct ipmi_addr *addr) |
478 | { | |
479 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
480 | } | |
481 | ||
482 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
483 | { | |
484 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
485 | } | |
486 | ||
487 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
488 | { | |
489 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
490 | } | |
b2655f26 | 491 | |
393d2cc3 CM |
492 | static void free_recv_msg_list(struct list_head *q) |
493 | { | |
494 | struct ipmi_recv_msg *msg, *msg2; | |
495 | ||
496 | list_for_each_entry_safe(msg, msg2, q, link) { | |
497 | list_del(&msg->link); | |
498 | ipmi_free_recv_msg(msg); | |
499 | } | |
500 | } | |
501 | ||
f3ce6a0e CM |
502 | static void free_smi_msg_list(struct list_head *q) |
503 | { | |
504 | struct ipmi_smi_msg *msg, *msg2; | |
505 | ||
506 | list_for_each_entry_safe(msg, msg2, q, link) { | |
507 | list_del(&msg->link); | |
508 | ipmi_free_smi_msg(msg); | |
509 | } | |
510 | } | |
511 | ||
393d2cc3 CM |
512 | static void clean_up_interface_data(ipmi_smi_t intf) |
513 | { | |
514 | int i; | |
515 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
516 | struct list_head list; |
517 | ||
7adf579c CM |
518 | tasklet_kill(&intf->recv_tasklet); |
519 | ||
f3ce6a0e | 520 | free_smi_msg_list(&intf->waiting_msgs); |
393d2cc3 CM |
521 | free_recv_msg_list(&intf->waiting_events); |
522 | ||
78ba2faf CM |
523 | /* |
524 | * Wholesale remove all the entries from the list in the | |
525 | * interface and wait for RCU to know that none are in use. | |
526 | */ | |
d6dfd131 | 527 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
528 | INIT_LIST_HEAD(&list); |
529 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 530 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
531 | |
532 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
533 | kfree(rcvr); | |
534 | ||
535 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
536 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 537 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 538 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
539 | } |
540 | } | |
541 | ||
542 | static void intf_free(struct kref *ref) | |
543 | { | |
544 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
545 | ||
546 | clean_up_interface_data(intf); | |
547 | kfree(intf); | |
548 | } | |
549 | ||
bca0324d | 550 | struct watcher_entry { |
b2c03941 CM |
551 | int intf_num; |
552 | ipmi_smi_t intf; | |
bca0324d | 553 | struct list_head link; |
bca0324d CM |
554 | }; |
555 | ||
1da177e4 LT |
556 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
557 | { | |
bca0324d | 558 | ipmi_smi_t intf; |
e381d1c4 | 559 | LIST_HEAD(to_deliver); |
bca0324d CM |
560 | struct watcher_entry *e, *e2; |
561 | ||
b2c03941 CM |
562 | mutex_lock(&smi_watchers_mutex); |
563 | ||
bca0324d CM |
564 | mutex_lock(&ipmi_interfaces_mutex); |
565 | ||
b2c03941 | 566 | /* Build a list of things to deliver. */ |
78ba2faf | 567 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
568 | if (intf->intf_num == -1) |
569 | continue; | |
570 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
571 | if (!e) | |
572 | goto out_err; | |
b2c03941 CM |
573 | kref_get(&intf->refcount); |
574 | e->intf = intf; | |
bca0324d CM |
575 | e->intf_num = intf->intf_num; |
576 | list_add_tail(&e->link, &to_deliver); | |
577 | } | |
1da177e4 | 578 | |
b2c03941 CM |
579 | /* We will succeed, so add it to the list. */ |
580 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
581 | |
582 | mutex_unlock(&ipmi_interfaces_mutex); | |
583 | ||
584 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
585 | list_del(&e->link); | |
b2c03941 CM |
586 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
587 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 588 | kfree(e); |
1da177e4 | 589 | } |
bca0324d | 590 | |
b2c03941 | 591 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 592 | |
1da177e4 | 593 | return 0; |
bca0324d CM |
594 | |
595 | out_err: | |
b2c03941 CM |
596 | mutex_unlock(&ipmi_interfaces_mutex); |
597 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
598 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
599 | list_del(&e->link); | |
b2c03941 | 600 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
601 | kfree(e); |
602 | } | |
603 | return -ENOMEM; | |
1da177e4 | 604 | } |
c70d7499 | 605 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
606 | |
607 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
608 | { | |
b2c03941 | 609 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 610 | list_del(&(watcher->link)); |
b2c03941 | 611 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
612 | return 0; |
613 | } | |
c70d7499 | 614 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 615 | |
b2c03941 CM |
616 | /* |
617 | * Must be called with smi_watchers_mutex held. | |
618 | */ | |
1da177e4 | 619 | static void |
50c812b2 | 620 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
621 | { |
622 | struct ipmi_smi_watcher *w; | |
623 | ||
1da177e4 LT |
624 | list_for_each_entry(w, &smi_watchers, link) { |
625 | if (try_module_get(w->owner)) { | |
50c812b2 | 626 | w->new_smi(i, dev); |
1da177e4 LT |
627 | module_put(w->owner); |
628 | } | |
629 | } | |
1da177e4 LT |
630 | } |
631 | ||
632 | static int | |
633 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
634 | { | |
635 | if (addr1->addr_type != addr2->addr_type) | |
636 | return 0; | |
637 | ||
638 | if (addr1->channel != addr2->channel) | |
639 | return 0; | |
640 | ||
641 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
642 | struct ipmi_system_interface_addr *smi_addr1 | |
643 | = (struct ipmi_system_interface_addr *) addr1; | |
644 | struct ipmi_system_interface_addr *smi_addr2 | |
645 | = (struct ipmi_system_interface_addr *) addr2; | |
646 | return (smi_addr1->lun == smi_addr2->lun); | |
647 | } | |
648 | ||
25176ed6 | 649 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
650 | struct ipmi_ipmb_addr *ipmb_addr1 |
651 | = (struct ipmi_ipmb_addr *) addr1; | |
652 | struct ipmi_ipmb_addr *ipmb_addr2 | |
653 | = (struct ipmi_ipmb_addr *) addr2; | |
654 | ||
655 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
656 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
657 | } | |
658 | ||
25176ed6 | 659 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
660 | struct ipmi_lan_addr *lan_addr1 |
661 | = (struct ipmi_lan_addr *) addr1; | |
662 | struct ipmi_lan_addr *lan_addr2 | |
663 | = (struct ipmi_lan_addr *) addr2; | |
664 | ||
665 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
666 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
667 | && (lan_addr1->session_handle | |
668 | == lan_addr2->session_handle) | |
669 | && (lan_addr1->lun == lan_addr2->lun)); | |
670 | } | |
671 | ||
672 | return 1; | |
673 | } | |
674 | ||
675 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
676 | { | |
c70d7499 | 677 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 678 | return -EINVAL; |
1da177e4 LT |
679 | |
680 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
681 | if (addr->channel != IPMI_BMC_CHANNEL) | |
682 | return -EINVAL; | |
683 | return 0; | |
684 | } | |
685 | ||
686 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 687 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
688 | || (addr->channel < 0)) |
689 | return -EINVAL; | |
690 | ||
25176ed6 | 691 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 692 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 693 | return -EINVAL; |
1da177e4 LT |
694 | return 0; |
695 | } | |
696 | ||
25176ed6 | 697 | if (is_lan_addr(addr)) { |
c70d7499 | 698 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 699 | return -EINVAL; |
1da177e4 LT |
700 | return 0; |
701 | } | |
702 | ||
703 | return -EINVAL; | |
704 | } | |
c70d7499 | 705 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
706 | |
707 | unsigned int ipmi_addr_length(int addr_type) | |
708 | { | |
709 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
710 | return sizeof(struct ipmi_system_interface_addr); | |
711 | ||
712 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 713 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 714 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
715 | |
716 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
717 | return sizeof(struct ipmi_lan_addr); | |
718 | ||
719 | return 0; | |
720 | } | |
c70d7499 | 721 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
722 | |
723 | static void deliver_response(struct ipmi_recv_msg *msg) | |
724 | { | |
8a3628d5 | 725 | if (!msg->user) { |
56a55ec6 | 726 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
727 | |
728 | /* Special handling for NULL users. */ | |
729 | if (intf->null_user_handler) { | |
730 | intf->null_user_handler(intf, msg); | |
b2655f26 | 731 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
732 | } else { |
733 | /* No handler, so give up. */ | |
b2655f26 | 734 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
735 | } |
736 | ipmi_free_recv_msg(msg); | |
737 | } else { | |
393d2cc3 CM |
738 | ipmi_user_t user = msg->user; |
739 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 740 | } |
1da177e4 LT |
741 | } |
742 | ||
b2c03941 CM |
743 | static void |
744 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
745 | { | |
746 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
747 | msg->msg_data[0] = err; | |
748 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
749 | msg->msg.data_len = 1; | |
750 | msg->msg.data = msg->msg_data; | |
751 | deliver_response(msg); | |
752 | } | |
753 | ||
c70d7499 CM |
754 | /* |
755 | * Find the next sequence number not being used and add the given | |
756 | * message with the given timeout to the sequence table. This must be | |
757 | * called with the interface's seq_lock held. | |
758 | */ | |
1da177e4 LT |
759 | static int intf_next_seq(ipmi_smi_t intf, |
760 | struct ipmi_recv_msg *recv_msg, | |
761 | unsigned long timeout, | |
762 | int retries, | |
763 | int broadcast, | |
764 | unsigned char *seq, | |
765 | long *seqid) | |
766 | { | |
767 | int rv = 0; | |
768 | unsigned int i; | |
769 | ||
c70d7499 CM |
770 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
771 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 772 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
773 | break; |
774 | } | |
775 | ||
8a3628d5 | 776 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
777 | intf->seq_table[i].recv_msg = recv_msg; |
778 | ||
c70d7499 CM |
779 | /* |
780 | * Start with the maximum timeout, when the send response | |
781 | * comes in we will start the real timer. | |
782 | */ | |
1da177e4 LT |
783 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
784 | intf->seq_table[i].orig_timeout = timeout; | |
785 | intf->seq_table[i].retries_left = retries; | |
786 | intf->seq_table[i].broadcast = broadcast; | |
787 | intf->seq_table[i].inuse = 1; | |
788 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
789 | *seq = i; | |
790 | *seqid = intf->seq_table[i].seqid; | |
791 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 792 | need_waiter(intf); |
1da177e4 LT |
793 | } else { |
794 | rv = -EAGAIN; | |
795 | } | |
c70d7499 | 796 | |
1da177e4 LT |
797 | return rv; |
798 | } | |
799 | ||
c70d7499 CM |
800 | /* |
801 | * Return the receive message for the given sequence number and | |
802 | * release the sequence number so it can be reused. Some other data | |
803 | * is passed in to be sure the message matches up correctly (to help | |
804 | * guard against message coming in after their timeout and the | |
805 | * sequence number being reused). | |
806 | */ | |
1da177e4 LT |
807 | static int intf_find_seq(ipmi_smi_t intf, |
808 | unsigned char seq, | |
809 | short channel, | |
810 | unsigned char cmd, | |
811 | unsigned char netfn, | |
812 | struct ipmi_addr *addr, | |
813 | struct ipmi_recv_msg **recv_msg) | |
814 | { | |
815 | int rv = -ENODEV; | |
816 | unsigned long flags; | |
817 | ||
818 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
819 | return -EINVAL; | |
820 | ||
821 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
822 | if (intf->seq_table[seq].inuse) { | |
823 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
824 | ||
c70d7499 CM |
825 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
826 | && (msg->msg.netfn == netfn) | |
827 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
828 | *recv_msg = msg; |
829 | intf->seq_table[seq].inuse = 0; | |
830 | rv = 0; | |
831 | } | |
832 | } | |
833 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
834 | ||
835 | return rv; | |
836 | } | |
837 | ||
838 | ||
839 | /* Start the timer for a specific sequence table entry. */ | |
840 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
841 | long msgid) | |
842 | { | |
843 | int rv = -ENODEV; | |
844 | unsigned long flags; | |
845 | unsigned char seq; | |
846 | unsigned long seqid; | |
847 | ||
848 | ||
849 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
850 | ||
851 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
852 | /* |
853 | * We do this verification because the user can be deleted | |
854 | * while a message is outstanding. | |
855 | */ | |
1da177e4 | 856 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 857 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
858 | struct seq_table *ent = &(intf->seq_table[seq]); |
859 | ent->timeout = ent->orig_timeout; | |
860 | rv = 0; | |
861 | } | |
862 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
863 | ||
864 | return rv; | |
865 | } | |
866 | ||
867 | /* Got an error for the send message for a specific sequence number. */ | |
868 | static int intf_err_seq(ipmi_smi_t intf, | |
869 | long msgid, | |
870 | unsigned int err) | |
871 | { | |
872 | int rv = -ENODEV; | |
873 | unsigned long flags; | |
874 | unsigned char seq; | |
875 | unsigned long seqid; | |
876 | struct ipmi_recv_msg *msg = NULL; | |
877 | ||
878 | ||
879 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
880 | ||
881 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
882 | /* |
883 | * We do this verification because the user can be deleted | |
884 | * while a message is outstanding. | |
885 | */ | |
1da177e4 | 886 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 887 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
888 | struct seq_table *ent = &(intf->seq_table[seq]); |
889 | ||
890 | ent->inuse = 0; | |
891 | msg = ent->recv_msg; | |
892 | rv = 0; | |
893 | } | |
894 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
895 | ||
b2c03941 CM |
896 | if (msg) |
897 | deliver_err_response(msg, err); | |
1da177e4 LT |
898 | |
899 | return rv; | |
900 | } | |
901 | ||
902 | ||
903 | int ipmi_create_user(unsigned int if_num, | |
904 | struct ipmi_user_hndl *handler, | |
905 | void *handler_data, | |
906 | ipmi_user_t *user) | |
907 | { | |
908 | unsigned long flags; | |
909 | ipmi_user_t new_user; | |
910 | int rv = 0; | |
911 | ipmi_smi_t intf; | |
912 | ||
c70d7499 CM |
913 | /* |
914 | * There is no module usecount here, because it's not | |
915 | * required. Since this can only be used by and called from | |
916 | * other modules, they will implicitly use this module, and | |
917 | * thus this can't be removed unless the other modules are | |
918 | * removed. | |
919 | */ | |
1da177e4 LT |
920 | |
921 | if (handler == NULL) | |
922 | return -EINVAL; | |
923 | ||
c70d7499 CM |
924 | /* |
925 | * Make sure the driver is actually initialized, this handles | |
926 | * problems with initialization order. | |
927 | */ | |
1da177e4 LT |
928 | if (!initialized) { |
929 | rv = ipmi_init_msghandler(); | |
930 | if (rv) | |
931 | return rv; | |
932 | ||
c70d7499 CM |
933 | /* |
934 | * The init code doesn't return an error if it was turned | |
935 | * off, but it won't initialize. Check that. | |
936 | */ | |
1da177e4 LT |
937 | if (!initialized) |
938 | return -ENODEV; | |
939 | } | |
940 | ||
941 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 942 | if (!new_user) |
1da177e4 LT |
943 | return -ENOMEM; |
944 | ||
b2c03941 | 945 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
946 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
947 | if (intf->intf_num == if_num) | |
948 | goto found; | |
1da177e4 | 949 | } |
b2c03941 | 950 | /* Not found, return an error */ |
bca0324d CM |
951 | rv = -EINVAL; |
952 | goto out_kfree; | |
1da177e4 | 953 | |
bca0324d | 954 | found: |
393d2cc3 CM |
955 | /* Note that each existing user holds a refcount to the interface. */ |
956 | kref_get(&intf->refcount); | |
1da177e4 | 957 | |
393d2cc3 | 958 | kref_init(&new_user->refcount); |
1da177e4 LT |
959 | new_user->handler = handler; |
960 | new_user->handler_data = handler_data; | |
961 | new_user->intf = intf; | |
89986496 | 962 | new_user->gets_events = false; |
1da177e4 LT |
963 | |
964 | if (!try_module_get(intf->handlers->owner)) { | |
965 | rv = -ENODEV; | |
5c98d29a | 966 | goto out_kref; |
1da177e4 LT |
967 | } |
968 | ||
969 | if (intf->handlers->inc_usecount) { | |
970 | rv = intf->handlers->inc_usecount(intf->send_info); | |
971 | if (rv) { | |
972 | module_put(intf->handlers->owner); | |
5c98d29a | 973 | goto out_kref; |
1da177e4 LT |
974 | } |
975 | } | |
976 | ||
c70d7499 CM |
977 | /* |
978 | * Hold the lock so intf->handlers is guaranteed to be good | |
979 | * until now | |
980 | */ | |
b2c03941 CM |
981 | mutex_unlock(&ipmi_interfaces_mutex); |
982 | ||
7aefac26 | 983 | new_user->valid = true; |
393d2cc3 CM |
984 | spin_lock_irqsave(&intf->seq_lock, flags); |
985 | list_add_rcu(&new_user->link, &intf->users); | |
986 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
987 | if (handler->ipmi_watchdog_pretimeout) { |
988 | /* User wants pretimeouts, so make sure to watch for them. */ | |
989 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
990 | need_waiter(intf); | |
991 | } | |
393d2cc3 CM |
992 | *user = new_user; |
993 | return 0; | |
1da177e4 | 994 | |
5c98d29a | 995 | out_kref: |
393d2cc3 | 996 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 997 | out_kfree: |
b2c03941 | 998 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 999 | kfree(new_user); |
1da177e4 LT |
1000 | return rv; |
1001 | } | |
c70d7499 | 1002 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1003 | |
16f4232c ZY |
1004 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1005 | { | |
1006 | int rv = 0; | |
1007 | ipmi_smi_t intf; | |
1008 | struct ipmi_smi_handlers *handlers; | |
1009 | ||
1010 | mutex_lock(&ipmi_interfaces_mutex); | |
1011 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1012 | if (intf->intf_num == if_num) | |
1013 | goto found; | |
1014 | } | |
1015 | /* Not found, return an error */ | |
1016 | rv = -EINVAL; | |
1017 | mutex_unlock(&ipmi_interfaces_mutex); | |
1018 | return rv; | |
1019 | ||
1020 | found: | |
1021 | handlers = intf->handlers; | |
1022 | rv = -ENOSYS; | |
1023 | if (handlers->get_smi_info) | |
1024 | rv = handlers->get_smi_info(intf->send_info, data); | |
1025 | mutex_unlock(&ipmi_interfaces_mutex); | |
1026 | ||
1027 | return rv; | |
1028 | } | |
1029 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1030 | ||
393d2cc3 CM |
1031 | static void free_user(struct kref *ref) |
1032 | { | |
1033 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1034 | kfree(user); | |
1035 | } | |
1036 | ||
1037 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1038 | { |
393d2cc3 | 1039 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1040 | int i; |
1041 | unsigned long flags; | |
393d2cc3 | 1042 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1043 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1044 | |
7aefac26 | 1045 | user->valid = false; |
1da177e4 | 1046 | |
89986496 CM |
1047 | if (user->handler->ipmi_watchdog_pretimeout) |
1048 | atomic_dec(&intf->event_waiters); | |
1049 | ||
1050 | if (user->gets_events) | |
1051 | atomic_dec(&intf->event_waiters); | |
1052 | ||
393d2cc3 CM |
1053 | /* Remove the user from the interface's sequence table. */ |
1054 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1055 | list_del_rcu(&user->link); | |
1da177e4 | 1056 | |
e8b33617 | 1057 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1058 | if (intf->seq_table[i].inuse |
c70d7499 | 1059 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1060 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1061 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1062 | } |
1063 | } | |
393d2cc3 CM |
1064 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1065 | ||
1066 | /* | |
1067 | * Remove the user from the command receiver's table. First | |
1068 | * we build a list of everything (not using the standard link, | |
1069 | * since other things may be using it till we do | |
1070 | * synchronize_rcu()) then free everything in that list. | |
1071 | */ | |
d6dfd131 | 1072 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1073 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1074 | if (rcvr->user == user) { |
393d2cc3 CM |
1075 | list_del_rcu(&rcvr->link); |
1076 | rcvr->next = rcvrs; | |
1077 | rcvrs = rcvr; | |
1da177e4 LT |
1078 | } |
1079 | } | |
d6dfd131 | 1080 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1081 | synchronize_rcu(); |
1082 | while (rcvrs) { | |
1083 | rcvr = rcvrs; | |
1084 | rcvrs = rcvr->next; | |
1085 | kfree(rcvr); | |
1086 | } | |
1da177e4 | 1087 | |
b2c03941 CM |
1088 | mutex_lock(&ipmi_interfaces_mutex); |
1089 | if (intf->handlers) { | |
1090 | module_put(intf->handlers->owner); | |
1091 | if (intf->handlers->dec_usecount) | |
1092 | intf->handlers->dec_usecount(intf->send_info); | |
1093 | } | |
1094 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1095 | |
393d2cc3 | 1096 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1097 | |
393d2cc3 | 1098 | kref_put(&user->refcount, free_user); |
1da177e4 | 1099 | |
8a3628d5 | 1100 | return 0; |
1da177e4 | 1101 | } |
c70d7499 | 1102 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1103 | |
1104 | void ipmi_get_version(ipmi_user_t user, | |
1105 | unsigned char *major, | |
1106 | unsigned char *minor) | |
1107 | { | |
b2c03941 CM |
1108 | *major = user->intf->ipmi_version_major; |
1109 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1110 | } |
c70d7499 | 1111 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1112 | |
c14979b9 CM |
1113 | int ipmi_set_my_address(ipmi_user_t user, |
1114 | unsigned int channel, | |
1115 | unsigned char address) | |
1da177e4 | 1116 | { |
c14979b9 CM |
1117 | if (channel >= IPMI_MAX_CHANNELS) |
1118 | return -EINVAL; | |
1119 | user->intf->channels[channel].address = address; | |
1120 | return 0; | |
1da177e4 | 1121 | } |
c70d7499 | 1122 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1123 | |
c14979b9 CM |
1124 | int ipmi_get_my_address(ipmi_user_t user, |
1125 | unsigned int channel, | |
1126 | unsigned char *address) | |
1da177e4 | 1127 | { |
c14979b9 CM |
1128 | if (channel >= IPMI_MAX_CHANNELS) |
1129 | return -EINVAL; | |
1130 | *address = user->intf->channels[channel].address; | |
1131 | return 0; | |
1da177e4 | 1132 | } |
c70d7499 | 1133 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1134 | |
c14979b9 CM |
1135 | int ipmi_set_my_LUN(ipmi_user_t user, |
1136 | unsigned int channel, | |
1137 | unsigned char LUN) | |
1da177e4 | 1138 | { |
c14979b9 CM |
1139 | if (channel >= IPMI_MAX_CHANNELS) |
1140 | return -EINVAL; | |
1141 | user->intf->channels[channel].lun = LUN & 0x3; | |
1142 | return 0; | |
1da177e4 | 1143 | } |
c70d7499 | 1144 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1145 | |
c14979b9 CM |
1146 | int ipmi_get_my_LUN(ipmi_user_t user, |
1147 | unsigned int channel, | |
1148 | unsigned char *address) | |
1da177e4 | 1149 | { |
c14979b9 CM |
1150 | if (channel >= IPMI_MAX_CHANNELS) |
1151 | return -EINVAL; | |
1152 | *address = user->intf->channels[channel].lun; | |
1153 | return 0; | |
1da177e4 | 1154 | } |
c70d7499 | 1155 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1156 | |
b9675136 CM |
1157 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1158 | { | |
1159 | int mode; | |
1160 | unsigned long flags; | |
1161 | ||
1162 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1163 | mode = user->intf->maintenance_mode; | |
1164 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1165 | ||
1166 | return mode; | |
1167 | } | |
1168 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1169 | ||
1170 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1171 | { | |
1172 | if (intf->handlers->set_maintenance_mode) | |
1173 | intf->handlers->set_maintenance_mode( | |
1174 | intf->send_info, intf->maintenance_mode_enable); | |
1175 | } | |
1176 | ||
1177 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1178 | { | |
1179 | int rv = 0; | |
1180 | unsigned long flags; | |
1181 | ipmi_smi_t intf = user->intf; | |
1182 | ||
1183 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1184 | if (intf->maintenance_mode != mode) { | |
1185 | switch (mode) { | |
1186 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1187 | intf->maintenance_mode_enable |
1188 | = (intf->auto_maintenance_timeout > 0); | |
1189 | break; | |
1190 | ||
1191 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1192 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1193 | break; |
1194 | ||
1195 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1196 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1197 | break; |
1198 | ||
1199 | default: | |
1200 | rv = -EINVAL; | |
1201 | goto out_unlock; | |
1202 | } | |
7aefac26 | 1203 | intf->maintenance_mode = mode; |
b9675136 CM |
1204 | |
1205 | maintenance_mode_update(intf); | |
1206 | } | |
1207 | out_unlock: | |
1208 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1209 | ||
1210 | return rv; | |
1211 | } | |
1212 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1213 | ||
89986496 | 1214 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1215 | { |
393d2cc3 CM |
1216 | unsigned long flags; |
1217 | ipmi_smi_t intf = user->intf; | |
1218 | struct ipmi_recv_msg *msg, *msg2; | |
1219 | struct list_head msgs; | |
1da177e4 | 1220 | |
393d2cc3 CM |
1221 | INIT_LIST_HEAD(&msgs); |
1222 | ||
1223 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1224 | if (user->gets_events == val) |
1225 | goto out; | |
1226 | ||
1da177e4 LT |
1227 | user->gets_events = val; |
1228 | ||
89986496 CM |
1229 | if (val) { |
1230 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1231 | need_waiter(intf); | |
1232 | } else { | |
1233 | atomic_dec(&intf->event_waiters); | |
1234 | } | |
1235 | ||
b2c03941 CM |
1236 | if (intf->delivering_events) |
1237 | /* | |
1238 | * Another thread is delivering events for this, so | |
1239 | * let it handle any new events. | |
1240 | */ | |
1241 | goto out; | |
1242 | ||
1243 | /* Deliver any queued events. */ | |
1244 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1245 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1246 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1247 | intf->waiting_events_count = 0; |
87ebd06f CM |
1248 | if (intf->event_msg_printed) { |
1249 | printk(KERN_WARNING PFX "Event queue no longer" | |
1250 | " full\n"); | |
1251 | intf->event_msg_printed = 0; | |
1252 | } | |
393d2cc3 | 1253 | |
b2c03941 CM |
1254 | intf->delivering_events = 1; |
1255 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1256 | ||
1257 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1258 | msg->user = user; | |
1259 | kref_get(&user->refcount); | |
1260 | deliver_response(msg); | |
1261 | } | |
1262 | ||
1263 | spin_lock_irqsave(&intf->events_lock, flags); | |
1264 | intf->delivering_events = 0; | |
393d2cc3 CM |
1265 | } |
1266 | ||
b2c03941 | 1267 | out: |
393d2cc3 | 1268 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1269 | |
1270 | return 0; | |
1271 | } | |
c70d7499 | 1272 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1273 | |
393d2cc3 CM |
1274 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1275 | unsigned char netfn, | |
c69c3127 CM |
1276 | unsigned char cmd, |
1277 | unsigned char chan) | |
393d2cc3 CM |
1278 | { |
1279 | struct cmd_rcvr *rcvr; | |
1280 | ||
1281 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1282 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1283 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1284 | return rcvr; |
1285 | } | |
1286 | return NULL; | |
1287 | } | |
1288 | ||
c69c3127 CM |
1289 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1290 | unsigned char netfn, | |
1291 | unsigned char cmd, | |
1292 | unsigned int chans) | |
1293 | { | |
1294 | struct cmd_rcvr *rcvr; | |
1295 | ||
1296 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1297 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1298 | && (rcvr->chans & chans)) | |
1299 | return 0; | |
1300 | } | |
1301 | return 1; | |
1302 | } | |
1303 | ||
1da177e4 LT |
1304 | int ipmi_register_for_cmd(ipmi_user_t user, |
1305 | unsigned char netfn, | |
c69c3127 CM |
1306 | unsigned char cmd, |
1307 | unsigned int chans) | |
1da177e4 | 1308 | { |
393d2cc3 CM |
1309 | ipmi_smi_t intf = user->intf; |
1310 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1311 | int rv = 0; |
1da177e4 LT |
1312 | |
1313 | ||
1314 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1315 | if (!rcvr) |
1da177e4 | 1316 | return -ENOMEM; |
393d2cc3 CM |
1317 | rcvr->cmd = cmd; |
1318 | rcvr->netfn = netfn; | |
c69c3127 | 1319 | rcvr->chans = chans; |
393d2cc3 | 1320 | rcvr->user = user; |
1da177e4 | 1321 | |
d6dfd131 | 1322 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1323 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1324 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1325 | rv = -EBUSY; |
1326 | goto out_unlock; | |
1da177e4 | 1327 | } |
877197ef | 1328 | |
89986496 CM |
1329 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1330 | need_waiter(intf); | |
1331 | ||
393d2cc3 | 1332 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1333 | |
393d2cc3 | 1334 | out_unlock: |
d6dfd131 | 1335 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1336 | if (rv) |
1337 | kfree(rcvr); | |
1338 | ||
1339 | return rv; | |
1340 | } | |
c70d7499 | 1341 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1342 | |
1343 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1344 | unsigned char netfn, | |
c69c3127 CM |
1345 | unsigned char cmd, |
1346 | unsigned int chans) | |
1da177e4 | 1347 | { |
393d2cc3 CM |
1348 | ipmi_smi_t intf = user->intf; |
1349 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1350 | struct cmd_rcvr *rcvrs = NULL; |
1351 | int i, rv = -ENOENT; | |
1da177e4 | 1352 | |
d6dfd131 | 1353 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1354 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1355 | if (((1 << i) & chans) == 0) | |
1356 | continue; | |
1357 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1358 | if (rcvr == NULL) | |
1359 | continue; | |
1360 | if (rcvr->user == user) { | |
1361 | rv = 0; | |
1362 | rcvr->chans &= ~chans; | |
1363 | if (rcvr->chans == 0) { | |
1364 | list_del_rcu(&rcvr->link); | |
1365 | rcvr->next = rcvrs; | |
1366 | rcvrs = rcvr; | |
1367 | } | |
1368 | } | |
1369 | } | |
1370 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1371 | synchronize_rcu(); | |
1372 | while (rcvrs) { | |
89986496 | 1373 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1374 | rcvr = rcvrs; |
1375 | rcvrs = rcvr->next; | |
393d2cc3 | 1376 | kfree(rcvr); |
1da177e4 | 1377 | } |
c69c3127 | 1378 | return rv; |
1da177e4 | 1379 | } |
c70d7499 | 1380 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1381 | |
1da177e4 LT |
1382 | static unsigned char |
1383 | ipmb_checksum(unsigned char *data, int size) | |
1384 | { | |
1385 | unsigned char csum = 0; | |
c70d7499 | 1386 | |
1da177e4 LT |
1387 | for (; size > 0; size--, data++) |
1388 | csum += *data; | |
1389 | ||
1390 | return -csum; | |
1391 | } | |
1392 | ||
1393 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1394 | struct kernel_ipmi_msg *msg, | |
1395 | struct ipmi_ipmb_addr *ipmb_addr, | |
1396 | long msgid, | |
1397 | unsigned char ipmb_seq, | |
1398 | int broadcast, | |
1399 | unsigned char source_address, | |
1400 | unsigned char source_lun) | |
1401 | { | |
1402 | int i = broadcast; | |
1403 | ||
1404 | /* Format the IPMB header data. */ | |
1405 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1406 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1407 | smi_msg->data[2] = ipmb_addr->channel; | |
1408 | if (broadcast) | |
1409 | smi_msg->data[3] = 0; | |
1410 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1411 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1412 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1413 | smi_msg->data[i+6] = source_address; | |
1414 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1415 | smi_msg->data[i+8] = msg->cmd; | |
1416 | ||
1417 | /* Now tack on the data to the message. */ | |
1418 | if (msg->data_len > 0) | |
1419 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1420 | msg->data_len); | |
1421 | smi_msg->data_size = msg->data_len + 9; | |
1422 | ||
1423 | /* Now calculate the checksum and tack it on. */ | |
1424 | smi_msg->data[i+smi_msg->data_size] | |
1425 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1426 | smi_msg->data_size-6); | |
1427 | ||
c70d7499 CM |
1428 | /* |
1429 | * Add on the checksum size and the offset from the | |
1430 | * broadcast. | |
1431 | */ | |
1da177e4 LT |
1432 | smi_msg->data_size += 1 + i; |
1433 | ||
1434 | smi_msg->msgid = msgid; | |
1435 | } | |
1436 | ||
1437 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1438 | struct kernel_ipmi_msg *msg, | |
1439 | struct ipmi_lan_addr *lan_addr, | |
1440 | long msgid, | |
1441 | unsigned char ipmb_seq, | |
1442 | unsigned char source_lun) | |
1443 | { | |
1444 | /* Format the IPMB header data. */ | |
1445 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1446 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1447 | smi_msg->data[2] = lan_addr->channel; | |
1448 | smi_msg->data[3] = lan_addr->session_handle; | |
1449 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1450 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1451 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1452 | smi_msg->data[7] = lan_addr->local_SWID; | |
1453 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1454 | smi_msg->data[9] = msg->cmd; | |
1455 | ||
1456 | /* Now tack on the data to the message. */ | |
1457 | if (msg->data_len > 0) | |
1458 | memcpy(&(smi_msg->data[10]), msg->data, | |
1459 | msg->data_len); | |
1460 | smi_msg->data_size = msg->data_len + 10; | |
1461 | ||
1462 | /* Now calculate the checksum and tack it on. */ | |
1463 | smi_msg->data[smi_msg->data_size] | |
1464 | = ipmb_checksum(&(smi_msg->data[7]), | |
1465 | smi_msg->data_size-7); | |
1466 | ||
c70d7499 CM |
1467 | /* |
1468 | * Add on the checksum size and the offset from the | |
1469 | * broadcast. | |
1470 | */ | |
1da177e4 LT |
1471 | smi_msg->data_size += 1; |
1472 | ||
1473 | smi_msg->msgid = msgid; | |
1474 | } | |
1475 | ||
c70d7499 CM |
1476 | /* |
1477 | * Separate from ipmi_request so that the user does not have to be | |
1478 | * supplied in certain circumstances (mainly at panic time). If | |
1479 | * messages are supplied, they will be freed, even if an error | |
1480 | * occurs. | |
1481 | */ | |
393d2cc3 CM |
1482 | static int i_ipmi_request(ipmi_user_t user, |
1483 | ipmi_smi_t intf, | |
1484 | struct ipmi_addr *addr, | |
1485 | long msgid, | |
1486 | struct kernel_ipmi_msg *msg, | |
1487 | void *user_msg_data, | |
1488 | void *supplied_smi, | |
1489 | struct ipmi_recv_msg *supplied_recv, | |
1490 | int priority, | |
1491 | unsigned char source_address, | |
1492 | unsigned char source_lun, | |
1493 | int retries, | |
1494 | unsigned int retry_time_ms) | |
1da177e4 | 1495 | { |
b2c03941 CM |
1496 | int rv = 0; |
1497 | struct ipmi_smi_msg *smi_msg; | |
1498 | struct ipmi_recv_msg *recv_msg; | |
1499 | unsigned long flags; | |
1500 | struct ipmi_smi_handlers *handlers; | |
1da177e4 LT |
1501 | |
1502 | ||
c70d7499 | 1503 | if (supplied_recv) |
1da177e4 | 1504 | recv_msg = supplied_recv; |
c70d7499 | 1505 | else { |
1da177e4 | 1506 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1507 | if (recv_msg == NULL) |
1da177e4 | 1508 | return -ENOMEM; |
1da177e4 LT |
1509 | } |
1510 | recv_msg->user_msg_data = user_msg_data; | |
1511 | ||
c70d7499 | 1512 | if (supplied_smi) |
1da177e4 | 1513 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1514 | else { |
1da177e4 LT |
1515 | smi_msg = ipmi_alloc_smi_msg(); |
1516 | if (smi_msg == NULL) { | |
1517 | ipmi_free_recv_msg(recv_msg); | |
1518 | return -ENOMEM; | |
1519 | } | |
1520 | } | |
1521 | ||
b2c03941 CM |
1522 | rcu_read_lock(); |
1523 | handlers = intf->handlers; | |
1524 | if (!handlers) { | |
1525 | rv = -ENODEV; | |
1526 | goto out_err; | |
1527 | } | |
1528 | ||
1da177e4 | 1529 | recv_msg->user = user; |
393d2cc3 CM |
1530 | if (user) |
1531 | kref_get(&user->refcount); | |
1da177e4 | 1532 | recv_msg->msgid = msgid; |
c70d7499 CM |
1533 | /* |
1534 | * Store the message to send in the receive message so timeout | |
1535 | * responses can get the proper response data. | |
1536 | */ | |
1da177e4 LT |
1537 | recv_msg->msg = *msg; |
1538 | ||
1539 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1540 | struct ipmi_system_interface_addr *smi_addr; | |
1541 | ||
1542 | if (msg->netfn & 1) { | |
1543 | /* Responses are not allowed to the SMI. */ | |
1544 | rv = -EINVAL; | |
1545 | goto out_err; | |
1546 | } | |
1547 | ||
1548 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1549 | if (smi_addr->lun > 3) { | |
b2655f26 | 1550 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1551 | rv = -EINVAL; |
1552 | goto out_err; | |
1553 | } | |
1554 | ||
1555 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1556 | ||
1557 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1558 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1559 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1560 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1561 | /* | |
1562 | * We don't let the user do these, since we manage | |
1563 | * the sequence numbers. | |
1564 | */ | |
b2655f26 | 1565 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1566 | rv = -EINVAL; |
1567 | goto out_err; | |
1568 | } | |
1569 | ||
b9675136 CM |
1570 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1571 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1572 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1573 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1574 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1575 | intf->auto_maintenance_timeout | |
1576 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1577 | if (!intf->maintenance_mode | |
c70d7499 | 1578 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1579 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1580 | maintenance_mode_update(intf); |
1581 | } | |
1582 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1583 | flags); | |
1584 | } | |
1585 | ||
1da177e4 | 1586 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1587 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1588 | rv = -EMSGSIZE; |
1589 | goto out_err; | |
1590 | } | |
1591 | ||
1592 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1593 | smi_msg->data[1] = msg->cmd; | |
1594 | smi_msg->msgid = msgid; | |
1595 | smi_msg->user_data = recv_msg; | |
1596 | if (msg->data_len > 0) | |
1597 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1598 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1599 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1600 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1601 | struct ipmi_ipmb_addr *ipmb_addr; |
1602 | unsigned char ipmb_seq; | |
1603 | long seqid; | |
1604 | int broadcast = 0; | |
1605 | ||
9c101fd4 | 1606 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1607 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1608 | rv = -EINVAL; |
1609 | goto out_err; | |
1610 | } | |
1611 | ||
1612 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1613 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1614 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1615 | rv = -EINVAL; |
1616 | goto out_err; | |
1617 | } | |
1618 | ||
1619 | if (retries < 0) { | |
1620 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1621 | retries = 0; /* Don't retry broadcasts. */ | |
1622 | else | |
1623 | retries = 4; | |
1624 | } | |
1625 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1626 | /* |
1627 | * Broadcasts add a zero at the beginning of the | |
1628 | * message, but otherwise is the same as an IPMB | |
1629 | * address. | |
1630 | */ | |
1da177e4 LT |
1631 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1632 | broadcast = 1; | |
1633 | } | |
1634 | ||
1635 | ||
1636 | /* Default to 1 second retries. */ | |
1637 | if (retry_time_ms == 0) | |
1638 | retry_time_ms = 1000; | |
1639 | ||
c70d7499 CM |
1640 | /* |
1641 | * 9 for the header and 1 for the checksum, plus | |
1642 | * possibly one for the broadcast. | |
1643 | */ | |
1da177e4 | 1644 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1645 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1646 | rv = -EMSGSIZE; |
1647 | goto out_err; | |
1648 | } | |
1649 | ||
1650 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1651 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1652 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1653 | rv = -EINVAL; |
1654 | goto out_err; | |
1655 | } | |
1656 | ||
1657 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1658 | ||
1659 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1660 | /* |
1661 | * It's a response, so use the user's sequence | |
1662 | * from msgid. | |
1663 | */ | |
b2655f26 | 1664 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1665 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1666 | msgid, broadcast, | |
1667 | source_address, source_lun); | |
1668 | ||
c70d7499 CM |
1669 | /* |
1670 | * Save the receive message so we can use it | |
1671 | * to deliver the response. | |
1672 | */ | |
1da177e4 LT |
1673 | smi_msg->user_data = recv_msg; |
1674 | } else { | |
1675 | /* It's a command, so get a sequence for it. */ | |
1676 | ||
1677 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1678 | ||
c70d7499 CM |
1679 | /* |
1680 | * Create a sequence number with a 1 second | |
1681 | * timeout and 4 retries. | |
1682 | */ | |
1da177e4 LT |
1683 | rv = intf_next_seq(intf, |
1684 | recv_msg, | |
1685 | retry_time_ms, | |
1686 | retries, | |
1687 | broadcast, | |
1688 | &ipmb_seq, | |
1689 | &seqid); | |
1690 | if (rv) { | |
c70d7499 CM |
1691 | /* |
1692 | * We have used up all the sequence numbers, | |
1693 | * probably, so abort. | |
1694 | */ | |
1da177e4 LT |
1695 | spin_unlock_irqrestore(&(intf->seq_lock), |
1696 | flags); | |
1697 | goto out_err; | |
1698 | } | |
1699 | ||
25176ed6 CM |
1700 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1701 | ||
c70d7499 CM |
1702 | /* |
1703 | * Store the sequence number in the message, | |
1704 | * so that when the send message response | |
1705 | * comes back we can start the timer. | |
1706 | */ | |
1da177e4 LT |
1707 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1708 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1709 | ipmb_seq, broadcast, | |
1710 | source_address, source_lun); | |
1711 | ||
c70d7499 CM |
1712 | /* |
1713 | * Copy the message into the recv message data, so we | |
1714 | * can retransmit it later if necessary. | |
1715 | */ | |
1da177e4 LT |
1716 | memcpy(recv_msg->msg_data, smi_msg->data, |
1717 | smi_msg->data_size); | |
1718 | recv_msg->msg.data = recv_msg->msg_data; | |
1719 | recv_msg->msg.data_len = smi_msg->data_size; | |
1720 | ||
c70d7499 CM |
1721 | /* |
1722 | * We don't unlock until here, because we need | |
1723 | * to copy the completed message into the | |
1724 | * recv_msg before we release the lock. | |
1725 | * Otherwise, race conditions may bite us. I | |
1726 | * know that's pretty paranoid, but I prefer | |
1727 | * to be correct. | |
1728 | */ | |
1da177e4 LT |
1729 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1730 | } | |
25176ed6 | 1731 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1732 | struct ipmi_lan_addr *lan_addr; |
1733 | unsigned char ipmb_seq; | |
1734 | long seqid; | |
1735 | ||
12fc1d7b | 1736 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1737 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1738 | rv = -EINVAL; |
1739 | goto out_err; | |
1740 | } | |
1741 | ||
1742 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1743 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1744 | && (intf->channels[addr->channel].medium |
c70d7499 | 1745 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1746 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1747 | rv = -EINVAL; |
1748 | goto out_err; | |
1749 | } | |
1750 | ||
1751 | retries = 4; | |
1752 | ||
1753 | /* Default to 1 second retries. */ | |
1754 | if (retry_time_ms == 0) | |
1755 | retry_time_ms = 1000; | |
1756 | ||
1757 | /* 11 for the header and 1 for the checksum. */ | |
1758 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1759 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1760 | rv = -EMSGSIZE; |
1761 | goto out_err; | |
1762 | } | |
1763 | ||
1764 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1765 | if (lan_addr->lun > 3) { | |
b2655f26 | 1766 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1767 | rv = -EINVAL; |
1768 | goto out_err; | |
1769 | } | |
1770 | ||
1771 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1772 | ||
1773 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1774 | /* |
1775 | * It's a response, so use the user's sequence | |
1776 | * from msgid. | |
1777 | */ | |
b2655f26 | 1778 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1779 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1780 | msgid, source_lun); | |
1781 | ||
c70d7499 CM |
1782 | /* |
1783 | * Save the receive message so we can use it | |
1784 | * to deliver the response. | |
1785 | */ | |
1da177e4 LT |
1786 | smi_msg->user_data = recv_msg; |
1787 | } else { | |
1788 | /* It's a command, so get a sequence for it. */ | |
1789 | ||
1790 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1791 | ||
c70d7499 CM |
1792 | /* |
1793 | * Create a sequence number with a 1 second | |
1794 | * timeout and 4 retries. | |
1795 | */ | |
1da177e4 LT |
1796 | rv = intf_next_seq(intf, |
1797 | recv_msg, | |
1798 | retry_time_ms, | |
1799 | retries, | |
1800 | 0, | |
1801 | &ipmb_seq, | |
1802 | &seqid); | |
1803 | if (rv) { | |
c70d7499 CM |
1804 | /* |
1805 | * We have used up all the sequence numbers, | |
1806 | * probably, so abort. | |
1807 | */ | |
1da177e4 LT |
1808 | spin_unlock_irqrestore(&(intf->seq_lock), |
1809 | flags); | |
1810 | goto out_err; | |
1811 | } | |
1812 | ||
25176ed6 CM |
1813 | ipmi_inc_stat(intf, sent_lan_commands); |
1814 | ||
c70d7499 CM |
1815 | /* |
1816 | * Store the sequence number in the message, | |
1817 | * so that when the send message response | |
1818 | * comes back we can start the timer. | |
1819 | */ | |
1da177e4 LT |
1820 | format_lan_msg(smi_msg, msg, lan_addr, |
1821 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1822 | ipmb_seq, source_lun); | |
1823 | ||
c70d7499 CM |
1824 | /* |
1825 | * Copy the message into the recv message data, so we | |
1826 | * can retransmit it later if necessary. | |
1827 | */ | |
1da177e4 LT |
1828 | memcpy(recv_msg->msg_data, smi_msg->data, |
1829 | smi_msg->data_size); | |
1830 | recv_msg->msg.data = recv_msg->msg_data; | |
1831 | recv_msg->msg.data_len = smi_msg->data_size; | |
1832 | ||
c70d7499 CM |
1833 | /* |
1834 | * We don't unlock until here, because we need | |
1835 | * to copy the completed message into the | |
1836 | * recv_msg before we release the lock. | |
1837 | * Otherwise, race conditions may bite us. I | |
1838 | * know that's pretty paranoid, but I prefer | |
1839 | * to be correct. | |
1840 | */ | |
1da177e4 LT |
1841 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1842 | } | |
1843 | } else { | |
1844 | /* Unknown address type. */ | |
b2655f26 | 1845 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1846 | rv = -EINVAL; |
1847 | goto out_err; | |
1848 | } | |
1849 | ||
1850 | #ifdef DEBUG_MSGING | |
1851 | { | |
1852 | int m; | |
e8b33617 | 1853 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1854 | printk(" %2.2x", smi_msg->data[m]); |
1855 | printk("\n"); | |
1856 | } | |
1857 | #endif | |
b2c03941 CM |
1858 | |
1859 | handlers->sender(intf->send_info, smi_msg, priority); | |
1860 | rcu_read_unlock(); | |
1da177e4 LT |
1861 | |
1862 | return 0; | |
1863 | ||
1864 | out_err: | |
b2c03941 | 1865 | rcu_read_unlock(); |
1da177e4 LT |
1866 | ipmi_free_smi_msg(smi_msg); |
1867 | ipmi_free_recv_msg(recv_msg); | |
1868 | return rv; | |
1869 | } | |
1870 | ||
c14979b9 CM |
1871 | static int check_addr(ipmi_smi_t intf, |
1872 | struct ipmi_addr *addr, | |
1873 | unsigned char *saddr, | |
1874 | unsigned char *lun) | |
1875 | { | |
1876 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1877 | return -EINVAL; | |
1878 | *lun = intf->channels[addr->channel].lun; | |
1879 | *saddr = intf->channels[addr->channel].address; | |
1880 | return 0; | |
1881 | } | |
1882 | ||
1da177e4 LT |
1883 | int ipmi_request_settime(ipmi_user_t user, |
1884 | struct ipmi_addr *addr, | |
1885 | long msgid, | |
1886 | struct kernel_ipmi_msg *msg, | |
1887 | void *user_msg_data, | |
1888 | int priority, | |
1889 | int retries, | |
1890 | unsigned int retry_time_ms) | |
1891 | { | |
f0ba9390 | 1892 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1893 | int rv; |
1894 | ||
8a3628d5 | 1895 | if (!user) |
56a55ec6 | 1896 | return -EINVAL; |
c14979b9 CM |
1897 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1898 | if (rv) | |
1899 | return rv; | |
1da177e4 LT |
1900 | return i_ipmi_request(user, |
1901 | user->intf, | |
1902 | addr, | |
1903 | msgid, | |
1904 | msg, | |
1905 | user_msg_data, | |
1906 | NULL, NULL, | |
1907 | priority, | |
c14979b9 CM |
1908 | saddr, |
1909 | lun, | |
1da177e4 LT |
1910 | retries, |
1911 | retry_time_ms); | |
1912 | } | |
c70d7499 | 1913 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
1914 | |
1915 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1916 | struct ipmi_addr *addr, | |
1917 | long msgid, | |
1918 | struct kernel_ipmi_msg *msg, | |
1919 | void *user_msg_data, | |
1920 | void *supplied_smi, | |
1921 | struct ipmi_recv_msg *supplied_recv, | |
1922 | int priority) | |
1923 | { | |
9ebca93b | 1924 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1925 | int rv; |
1926 | ||
8a3628d5 | 1927 | if (!user) |
56a55ec6 | 1928 | return -EINVAL; |
c14979b9 CM |
1929 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1930 | if (rv) | |
1931 | return rv; | |
1da177e4 LT |
1932 | return i_ipmi_request(user, |
1933 | user->intf, | |
1934 | addr, | |
1935 | msgid, | |
1936 | msg, | |
1937 | user_msg_data, | |
1938 | supplied_smi, | |
1939 | supplied_recv, | |
1940 | priority, | |
c14979b9 CM |
1941 | saddr, |
1942 | lun, | |
1da177e4 LT |
1943 | -1, 0); |
1944 | } | |
c70d7499 | 1945 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 1946 | |
1aa16eea | 1947 | #ifdef CONFIG_PROC_FS |
07412736 | 1948 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1949 | { |
07412736 | 1950 | ipmi_smi_t intf = m->private; |
c14979b9 | 1951 | int i; |
1da177e4 | 1952 | |
07412736 AD |
1953 | seq_printf(m, "%x", intf->channels[0].address); |
1954 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) | |
1955 | seq_printf(m, " %x", intf->channels[i].address); | |
1956 | return seq_putc(m, '\n'); | |
1da177e4 LT |
1957 | } |
1958 | ||
07412736 | 1959 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 1960 | { |
d9dda78b | 1961 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 1962 | } |
1da177e4 | 1963 | |
07412736 AD |
1964 | static const struct file_operations smi_ipmb_proc_ops = { |
1965 | .open = smi_ipmb_proc_open, | |
1966 | .read = seq_read, | |
1967 | .llseek = seq_lseek, | |
1968 | .release = single_release, | |
1969 | }; | |
1970 | ||
1971 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
1972 | { | |
1973 | ipmi_smi_t intf = m->private; | |
1974 | ||
1975 | return seq_printf(m, "%u.%u\n", | |
50c812b2 CM |
1976 | ipmi_version_major(&intf->bmc->id), |
1977 | ipmi_version_minor(&intf->bmc->id)); | |
1da177e4 LT |
1978 | } |
1979 | ||
07412736 | 1980 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 1981 | { |
d9dda78b | 1982 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
1983 | } |
1984 | ||
1985 | static const struct file_operations smi_version_proc_ops = { | |
1986 | .open = smi_version_proc_open, | |
1987 | .read = seq_read, | |
1988 | .llseek = seq_lseek, | |
1989 | .release = single_release, | |
1990 | }; | |
1da177e4 | 1991 | |
07412736 AD |
1992 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
1993 | { | |
1994 | ipmi_smi_t intf = m->private; | |
1995 | ||
1996 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 1997 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 1998 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 1999 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2000 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2001 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2002 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2003 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2004 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2005 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2006 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2007 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2008 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2009 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2010 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2011 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2012 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2013 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2014 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2015 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2016 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2017 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2018 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2019 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2020 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2021 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2022 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2023 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2024 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2025 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2026 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2027 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2028 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2029 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2030 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2031 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2032 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2033 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2034 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2035 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2036 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2037 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2038 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2039 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2040 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2041 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2042 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2043 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2044 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2045 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2046 | seq_printf(m, "events: %u\n", |
b2655f26 | 2047 | ipmi_get_stat(intf, events)); |
07412736 | 2048 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2049 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2050 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2051 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2052 | return 0; |
2053 | } | |
1da177e4 | 2054 | |
07412736 AD |
2055 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2056 | { | |
d9dda78b | 2057 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2058 | } |
07412736 AD |
2059 | |
2060 | static const struct file_operations smi_stats_proc_ops = { | |
2061 | .open = smi_stats_proc_open, | |
2062 | .read = seq_read, | |
2063 | .llseek = seq_lseek, | |
2064 | .release = single_release, | |
2065 | }; | |
1aa16eea | 2066 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2067 | |
2068 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2069 | const struct file_operations *proc_ops, |
99b76233 | 2070 | void *data) |
1da177e4 | 2071 | { |
1da177e4 | 2072 | int rv = 0; |
3b625943 CM |
2073 | #ifdef CONFIG_PROC_FS |
2074 | struct proc_dir_entry *file; | |
1da177e4 LT |
2075 | struct ipmi_proc_entry *entry; |
2076 | ||
2077 | /* Create a list element. */ | |
2078 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2079 | if (!entry) | |
2080 | return -ENOMEM; | |
1b6b698f | 2081 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2082 | if (!entry->name) { |
2083 | kfree(entry); | |
2084 | return -ENOMEM; | |
2085 | } | |
1da177e4 | 2086 | |
07412736 | 2087 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2088 | if (!file) { |
2089 | kfree(entry->name); | |
2090 | kfree(entry); | |
2091 | rv = -ENOMEM; | |
2092 | } else { | |
ac019151 | 2093 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2094 | /* Stick it on the list. */ |
2095 | entry->next = smi->proc_entries; | |
2096 | smi->proc_entries = entry; | |
ac019151 | 2097 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2098 | } |
3b625943 | 2099 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2100 | |
2101 | return rv; | |
2102 | } | |
c70d7499 | 2103 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2104 | |
2105 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2106 | { | |
2107 | int rv = 0; | |
2108 | ||
3b625943 | 2109 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2110 | sprintf(smi->proc_dir_name, "%d", num); |
2111 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2112 | if (!smi->proc_dir) | |
2113 | rv = -ENOMEM; | |
1da177e4 LT |
2114 | |
2115 | if (rv == 0) | |
2116 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2117 | &smi_stats_proc_ops, |
99b76233 | 2118 | smi); |
1da177e4 LT |
2119 | |
2120 | if (rv == 0) | |
2121 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2122 | &smi_ipmb_proc_ops, |
99b76233 | 2123 | smi); |
1da177e4 LT |
2124 | |
2125 | if (rv == 0) | |
2126 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2127 | &smi_version_proc_ops, |
99b76233 | 2128 | smi); |
3b625943 | 2129 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2130 | |
2131 | return rv; | |
2132 | } | |
2133 | ||
2134 | static void remove_proc_entries(ipmi_smi_t smi) | |
2135 | { | |
3b625943 | 2136 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2137 | struct ipmi_proc_entry *entry; |
2138 | ||
ac019151 | 2139 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2140 | while (smi->proc_entries) { |
2141 | entry = smi->proc_entries; | |
2142 | smi->proc_entries = entry->next; | |
2143 | ||
2144 | remove_proc_entry(entry->name, smi->proc_dir); | |
2145 | kfree(entry->name); | |
2146 | kfree(entry); | |
2147 | } | |
ac019151 | 2148 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2149 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2150 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2151 | } |
2152 | ||
50c812b2 CM |
2153 | static int __find_bmc_guid(struct device *dev, void *data) |
2154 | { | |
2155 | unsigned char *id = data; | |
2156 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2157 | return memcmp(bmc->guid, id, 16) == 0; | |
2158 | } | |
2159 | ||
2160 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2161 | unsigned char *guid) | |
2162 | { | |
2163 | struct device *dev; | |
2164 | ||
2165 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2166 | if (dev) | |
2167 | return dev_get_drvdata(dev); | |
2168 | else | |
2169 | return NULL; | |
2170 | } | |
2171 | ||
2172 | struct prod_dev_id { | |
2173 | unsigned int product_id; | |
2174 | unsigned char device_id; | |
2175 | }; | |
2176 | ||
2177 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2178 | { | |
2179 | struct prod_dev_id *id = data; | |
2180 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2181 | ||
2182 | return (bmc->id.product_id == id->product_id | |
50c812b2 CM |
2183 | && bmc->id.device_id == id->device_id); |
2184 | } | |
2185 | ||
2186 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2187 | struct device_driver *drv, | |
f0b55da0 | 2188 | unsigned int product_id, unsigned char device_id) |
50c812b2 CM |
2189 | { |
2190 | struct prod_dev_id id = { | |
2191 | .product_id = product_id, | |
2192 | .device_id = device_id, | |
2193 | }; | |
2194 | struct device *dev; | |
2195 | ||
2196 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2197 | if (dev) | |
2198 | return dev_get_drvdata(dev); | |
2199 | else | |
2200 | return NULL; | |
2201 | } | |
2202 | ||
2203 | static ssize_t device_id_show(struct device *dev, | |
2204 | struct device_attribute *attr, | |
2205 | char *buf) | |
2206 | { | |
2207 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2208 | ||
2209 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2210 | } | |
2211 | ||
2212 | static ssize_t provides_dev_sdrs_show(struct device *dev, | |
2213 | struct device_attribute *attr, | |
2214 | char *buf) | |
2215 | { | |
2216 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2217 | ||
2218 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2219 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 CM |
2220 | } |
2221 | ||
2222 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2223 | char *buf) | |
2224 | { | |
2225 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2226 | ||
2227 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2228 | bmc->id.device_revision & 0x0F); |
50c812b2 CM |
2229 | } |
2230 | ||
2231 | static ssize_t firmware_rev_show(struct device *dev, | |
2232 | struct device_attribute *attr, | |
2233 | char *buf) | |
2234 | { | |
2235 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2236 | ||
2237 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2238 | bmc->id.firmware_revision_2); | |
2239 | } | |
2240 | ||
2241 | static ssize_t ipmi_version_show(struct device *dev, | |
2242 | struct device_attribute *attr, | |
2243 | char *buf) | |
2244 | { | |
2245 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2246 | ||
2247 | return snprintf(buf, 20, "%u.%u\n", | |
2248 | ipmi_version_major(&bmc->id), | |
2249 | ipmi_version_minor(&bmc->id)); | |
2250 | } | |
2251 | ||
2252 | static ssize_t add_dev_support_show(struct device *dev, | |
2253 | struct device_attribute *attr, | |
2254 | char *buf) | |
2255 | { | |
2256 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2257 | ||
2258 | return snprintf(buf, 10, "0x%02x\n", | |
2259 | bmc->id.additional_device_support); | |
2260 | } | |
2261 | ||
2262 | static ssize_t manufacturer_id_show(struct device *dev, | |
2263 | struct device_attribute *attr, | |
2264 | char *buf) | |
2265 | { | |
2266 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2267 | ||
2268 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2269 | } | |
2270 | ||
2271 | static ssize_t product_id_show(struct device *dev, | |
2272 | struct device_attribute *attr, | |
2273 | char *buf) | |
2274 | { | |
2275 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2276 | ||
2277 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2278 | } | |
2279 | ||
2280 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2281 | struct device_attribute *attr, | |
2282 | char *buf) | |
2283 | { | |
2284 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2285 | ||
2286 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2287 | bmc->id.aux_firmware_revision[3], | |
2288 | bmc->id.aux_firmware_revision[2], | |
2289 | bmc->id.aux_firmware_revision[1], | |
2290 | bmc->id.aux_firmware_revision[0]); | |
2291 | } | |
2292 | ||
2293 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2294 | char *buf) | |
2295 | { | |
2296 | struct bmc_device *bmc = dev_get_drvdata(dev); | |
2297 | ||
2298 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2299 | (long long) bmc->guid[0], | |
2300 | (long long) bmc->guid[8]); | |
2301 | } | |
2302 | ||
5e59393e | 2303 | static void remove_files(struct bmc_device *bmc) |
50c812b2 | 2304 | { |
f0b55da0 CM |
2305 | if (!bmc->dev) |
2306 | return; | |
2307 | ||
50c812b2 CM |
2308 | device_remove_file(&bmc->dev->dev, |
2309 | &bmc->device_id_attr); | |
2310 | device_remove_file(&bmc->dev->dev, | |
2311 | &bmc->provides_dev_sdrs_attr); | |
2312 | device_remove_file(&bmc->dev->dev, | |
2313 | &bmc->revision_attr); | |
2314 | device_remove_file(&bmc->dev->dev, | |
2315 | &bmc->firmware_rev_attr); | |
2316 | device_remove_file(&bmc->dev->dev, | |
2317 | &bmc->version_attr); | |
2318 | device_remove_file(&bmc->dev->dev, | |
2319 | &bmc->add_dev_support_attr); | |
2320 | device_remove_file(&bmc->dev->dev, | |
2321 | &bmc->manufacturer_id_attr); | |
2322 | device_remove_file(&bmc->dev->dev, | |
2323 | &bmc->product_id_attr); | |
5e59393e | 2324 | |
50c812b2 CM |
2325 | if (bmc->id.aux_firmware_revision_set) |
2326 | device_remove_file(&bmc->dev->dev, | |
2327 | &bmc->aux_firmware_rev_attr); | |
2328 | if (bmc->guid_set) | |
2329 | device_remove_file(&bmc->dev->dev, | |
2330 | &bmc->guid_attr); | |
5e59393e JG |
2331 | } |
2332 | ||
2333 | static void | |
2334 | cleanup_bmc_device(struct kref *ref) | |
2335 | { | |
2336 | struct bmc_device *bmc; | |
2337 | ||
2338 | bmc = container_of(ref, struct bmc_device, refcount); | |
2339 | ||
2340 | remove_files(bmc); | |
1d5636cc | 2341 | platform_device_unregister(bmc->dev); |
50c812b2 CM |
2342 | kfree(bmc); |
2343 | } | |
2344 | ||
2345 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2346 | { | |
2347 | struct bmc_device *bmc = intf->bmc; | |
2348 | ||
759643b8 CM |
2349 | if (intf->sysfs_name) { |
2350 | sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name); | |
2351 | kfree(intf->sysfs_name); | |
2352 | intf->sysfs_name = NULL; | |
2353 | } | |
50c812b2 CM |
2354 | if (intf->my_dev_name) { |
2355 | sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name); | |
2356 | kfree(intf->my_dev_name); | |
2357 | intf->my_dev_name = NULL; | |
2358 | } | |
2359 | ||
2360 | mutex_lock(&ipmidriver_mutex); | |
2361 | kref_put(&bmc->refcount, cleanup_bmc_device); | |
f0b55da0 | 2362 | intf->bmc = NULL; |
50c812b2 CM |
2363 | mutex_unlock(&ipmidriver_mutex); |
2364 | } | |
2365 | ||
5e59393e JG |
2366 | static int create_files(struct bmc_device *bmc) |
2367 | { | |
2368 | int err; | |
2369 | ||
f0b55da0 | 2370 | bmc->device_id_attr.attr.name = "device_id"; |
f0b55da0 CM |
2371 | bmc->device_id_attr.attr.mode = S_IRUGO; |
2372 | bmc->device_id_attr.show = device_id_show; | |
c7df670b | 2373 | sysfs_attr_init(&bmc->device_id_attr.attr); |
f0b55da0 CM |
2374 | |
2375 | bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs"; | |
f0b55da0 CM |
2376 | bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO; |
2377 | bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show; | |
c7df670b | 2378 | sysfs_attr_init(&bmc->provides_dev_sdrs_attr.attr); |
f0b55da0 CM |
2379 | |
2380 | bmc->revision_attr.attr.name = "revision"; | |
f0b55da0 CM |
2381 | bmc->revision_attr.attr.mode = S_IRUGO; |
2382 | bmc->revision_attr.show = revision_show; | |
c7df670b | 2383 | sysfs_attr_init(&bmc->revision_attr.attr); |
f0b55da0 CM |
2384 | |
2385 | bmc->firmware_rev_attr.attr.name = "firmware_revision"; | |
f0b55da0 CM |
2386 | bmc->firmware_rev_attr.attr.mode = S_IRUGO; |
2387 | bmc->firmware_rev_attr.show = firmware_rev_show; | |
c7df670b | 2388 | sysfs_attr_init(&bmc->firmware_rev_attr.attr); |
f0b55da0 CM |
2389 | |
2390 | bmc->version_attr.attr.name = "ipmi_version"; | |
f0b55da0 CM |
2391 | bmc->version_attr.attr.mode = S_IRUGO; |
2392 | bmc->version_attr.show = ipmi_version_show; | |
c7df670b | 2393 | sysfs_attr_init(&bmc->version_attr.attr); |
f0b55da0 CM |
2394 | |
2395 | bmc->add_dev_support_attr.attr.name = "additional_device_support"; | |
f0b55da0 CM |
2396 | bmc->add_dev_support_attr.attr.mode = S_IRUGO; |
2397 | bmc->add_dev_support_attr.show = add_dev_support_show; | |
c7df670b | 2398 | sysfs_attr_init(&bmc->add_dev_support_attr.attr); |
f0b55da0 CM |
2399 | |
2400 | bmc->manufacturer_id_attr.attr.name = "manufacturer_id"; | |
f0b55da0 CM |
2401 | bmc->manufacturer_id_attr.attr.mode = S_IRUGO; |
2402 | bmc->manufacturer_id_attr.show = manufacturer_id_show; | |
c7df670b | 2403 | sysfs_attr_init(&bmc->manufacturer_id_attr.attr); |
f0b55da0 CM |
2404 | |
2405 | bmc->product_id_attr.attr.name = "product_id"; | |
f0b55da0 CM |
2406 | bmc->product_id_attr.attr.mode = S_IRUGO; |
2407 | bmc->product_id_attr.show = product_id_show; | |
c7df670b | 2408 | sysfs_attr_init(&bmc->product_id_attr.attr); |
f0b55da0 CM |
2409 | |
2410 | bmc->guid_attr.attr.name = "guid"; | |
f0b55da0 CM |
2411 | bmc->guid_attr.attr.mode = S_IRUGO; |
2412 | bmc->guid_attr.show = guid_show; | |
c7df670b | 2413 | sysfs_attr_init(&bmc->guid_attr.attr); |
f0b55da0 CM |
2414 | |
2415 | bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision"; | |
f0b55da0 CM |
2416 | bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO; |
2417 | bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show; | |
c7df670b | 2418 | sysfs_attr_init(&bmc->aux_firmware_rev_attr.attr); |
f0b55da0 | 2419 | |
5e59393e JG |
2420 | err = device_create_file(&bmc->dev->dev, |
2421 | &bmc->device_id_attr); | |
c70d7499 CM |
2422 | if (err) |
2423 | goto out; | |
5e59393e JG |
2424 | err = device_create_file(&bmc->dev->dev, |
2425 | &bmc->provides_dev_sdrs_attr); | |
c70d7499 CM |
2426 | if (err) |
2427 | goto out_devid; | |
5e59393e JG |
2428 | err = device_create_file(&bmc->dev->dev, |
2429 | &bmc->revision_attr); | |
c70d7499 CM |
2430 | if (err) |
2431 | goto out_sdrs; | |
5e59393e JG |
2432 | err = device_create_file(&bmc->dev->dev, |
2433 | &bmc->firmware_rev_attr); | |
c70d7499 CM |
2434 | if (err) |
2435 | goto out_rev; | |
5e59393e JG |
2436 | err = device_create_file(&bmc->dev->dev, |
2437 | &bmc->version_attr); | |
c70d7499 CM |
2438 | if (err) |
2439 | goto out_firm; | |
5e59393e JG |
2440 | err = device_create_file(&bmc->dev->dev, |
2441 | &bmc->add_dev_support_attr); | |
c70d7499 CM |
2442 | if (err) |
2443 | goto out_version; | |
5e59393e JG |
2444 | err = device_create_file(&bmc->dev->dev, |
2445 | &bmc->manufacturer_id_attr); | |
c70d7499 CM |
2446 | if (err) |
2447 | goto out_add_dev; | |
5e59393e JG |
2448 | err = device_create_file(&bmc->dev->dev, |
2449 | &bmc->product_id_attr); | |
c70d7499 CM |
2450 | if (err) |
2451 | goto out_manu; | |
5e59393e JG |
2452 | if (bmc->id.aux_firmware_revision_set) { |
2453 | err = device_create_file(&bmc->dev->dev, | |
2454 | &bmc->aux_firmware_rev_attr); | |
c70d7499 CM |
2455 | if (err) |
2456 | goto out_prod_id; | |
5e59393e JG |
2457 | } |
2458 | if (bmc->guid_set) { | |
2459 | err = device_create_file(&bmc->dev->dev, | |
2460 | &bmc->guid_attr); | |
c70d7499 CM |
2461 | if (err) |
2462 | goto out_aux_firm; | |
5e59393e JG |
2463 | } |
2464 | ||
2465 | return 0; | |
2466 | ||
2467 | out_aux_firm: | |
2468 | if (bmc->id.aux_firmware_revision_set) | |
2469 | device_remove_file(&bmc->dev->dev, | |
2470 | &bmc->aux_firmware_rev_attr); | |
2471 | out_prod_id: | |
2472 | device_remove_file(&bmc->dev->dev, | |
2473 | &bmc->product_id_attr); | |
2474 | out_manu: | |
2475 | device_remove_file(&bmc->dev->dev, | |
2476 | &bmc->manufacturer_id_attr); | |
2477 | out_add_dev: | |
2478 | device_remove_file(&bmc->dev->dev, | |
2479 | &bmc->add_dev_support_attr); | |
2480 | out_version: | |
2481 | device_remove_file(&bmc->dev->dev, | |
2482 | &bmc->version_attr); | |
2483 | out_firm: | |
2484 | device_remove_file(&bmc->dev->dev, | |
2485 | &bmc->firmware_rev_attr); | |
2486 | out_rev: | |
2487 | device_remove_file(&bmc->dev->dev, | |
2488 | &bmc->revision_attr); | |
2489 | out_sdrs: | |
2490 | device_remove_file(&bmc->dev->dev, | |
2491 | &bmc->provides_dev_sdrs_attr); | |
2492 | out_devid: | |
2493 | device_remove_file(&bmc->dev->dev, | |
2494 | &bmc->device_id_attr); | |
2495 | out: | |
2496 | return err; | |
2497 | } | |
2498 | ||
759643b8 CM |
2499 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum, |
2500 | const char *sysfs_name) | |
50c812b2 CM |
2501 | { |
2502 | int rv; | |
2503 | struct bmc_device *bmc = intf->bmc; | |
2504 | struct bmc_device *old_bmc; | |
2505 | int size; | |
2506 | char dummy[1]; | |
2507 | ||
2508 | mutex_lock(&ipmidriver_mutex); | |
2509 | ||
2510 | /* | |
2511 | * Try to find if there is an bmc_device struct | |
2512 | * representing the interfaced BMC already | |
2513 | */ | |
2514 | if (bmc->guid_set) | |
fe2d5ffc | 2515 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2516 | else |
fe2d5ffc | 2517 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2518 | bmc->id.product_id, |
2519 | bmc->id.device_id); | |
2520 | ||
2521 | /* | |
2522 | * If there is already an bmc_device, free the new one, | |
2523 | * otherwise register the new BMC device | |
2524 | */ | |
2525 | if (old_bmc) { | |
2526 | kfree(bmc); | |
2527 | intf->bmc = old_bmc; | |
2528 | bmc = old_bmc; | |
2529 | ||
2530 | kref_get(&bmc->refcount); | |
2531 | mutex_unlock(&ipmidriver_mutex); | |
2532 | ||
2533 | printk(KERN_INFO | |
2534 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2535 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2536 | bmc->id.manufacturer_id, | |
2537 | bmc->id.product_id, | |
2538 | bmc->id.device_id); | |
2539 | } else { | |
f0b55da0 CM |
2540 | char name[14]; |
2541 | unsigned char orig_dev_id = bmc->id.device_id; | |
2542 | int warn_printed = 0; | |
2543 | ||
2544 | snprintf(name, sizeof(name), | |
2545 | "ipmi_bmc.%4.4x", bmc->id.product_id); | |
2546 | ||
fe2d5ffc | 2547 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
f0b55da0 | 2548 | bmc->id.product_id, |
1d5636cc | 2549 | bmc->id.device_id)) { |
f0b55da0 CM |
2550 | if (!warn_printed) { |
2551 | printk(KERN_WARNING PFX | |
2552 | "This machine has two different BMCs" | |
2553 | " with the same product id and device" | |
2554 | " id. This is an error in the" | |
2555 | " firmware, but incrementing the" | |
2556 | " device id to work around the problem." | |
2557 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2558 | bmc->id.product_id, bmc->id.device_id); | |
2559 | warn_printed = 1; | |
2560 | } | |
2561 | bmc->id.device_id++; /* Wraps at 255 */ | |
2562 | if (bmc->id.device_id == orig_dev_id) { | |
2563 | printk(KERN_ERR PFX | |
2564 | "Out of device ids!\n"); | |
2565 | break; | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | bmc->dev = platform_device_alloc(name, bmc->id.device_id); | |
8a3628d5 | 2570 | if (!bmc->dev) { |
f0b55da0 | 2571 | mutex_unlock(&ipmidriver_mutex); |
50c812b2 CM |
2572 | printk(KERN_ERR |
2573 | "ipmi_msghandler:" | |
2574 | " Unable to allocate platform device\n"); | |
2575 | return -ENOMEM; | |
2576 | } | |
fe2d5ffc | 2577 | bmc->dev->dev.driver = &ipmidriver.driver; |
50c812b2 CM |
2578 | dev_set_drvdata(&bmc->dev->dev, bmc); |
2579 | kref_init(&bmc->refcount); | |
2580 | ||
b48f5457 | 2581 | rv = platform_device_add(bmc->dev); |
50c812b2 CM |
2582 | mutex_unlock(&ipmidriver_mutex); |
2583 | if (rv) { | |
f0b55da0 CM |
2584 | platform_device_put(bmc->dev); |
2585 | bmc->dev = NULL; | |
50c812b2 CM |
2586 | printk(KERN_ERR |
2587 | "ipmi_msghandler:" | |
2588 | " Unable to register bmc device: %d\n", | |
2589 | rv); | |
c70d7499 CM |
2590 | /* |
2591 | * Don't go to out_err, you can only do that if | |
2592 | * the device is registered already. | |
2593 | */ | |
50c812b2 CM |
2594 | return rv; |
2595 | } | |
2596 | ||
5e59393e JG |
2597 | rv = create_files(bmc); |
2598 | if (rv) { | |
2599 | mutex_lock(&ipmidriver_mutex); | |
2600 | platform_device_unregister(bmc->dev); | |
2601 | mutex_unlock(&ipmidriver_mutex); | |
2602 | ||
2603 | return rv; | |
2604 | } | |
50c812b2 | 2605 | |
279fbd0c MS |
2606 | dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, " |
2607 | "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2608 | bmc->id.manufacturer_id, | |
2609 | bmc->id.product_id, | |
2610 | bmc->id.device_id); | |
50c812b2 CM |
2611 | } |
2612 | ||
2613 | /* | |
2614 | * create symlink from system interface device to bmc device | |
2615 | * and back. | |
2616 | */ | |
759643b8 CM |
2617 | intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL); |
2618 | if (!intf->sysfs_name) { | |
2619 | rv = -ENOMEM; | |
2620 | printk(KERN_ERR | |
2621 | "ipmi_msghandler: allocate link to BMC: %d\n", | |
2622 | rv); | |
2623 | goto out_err; | |
2624 | } | |
2625 | ||
50c812b2 | 2626 | rv = sysfs_create_link(&intf->si_dev->kobj, |
759643b8 | 2627 | &bmc->dev->dev.kobj, intf->sysfs_name); |
50c812b2 | 2628 | if (rv) { |
759643b8 CM |
2629 | kfree(intf->sysfs_name); |
2630 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2631 | printk(KERN_ERR |
2632 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2633 | rv); | |
2634 | goto out_err; | |
2635 | } | |
2636 | ||
759643b8 | 2637 | size = snprintf(dummy, 0, "ipmi%d", ifnum); |
50c812b2 CM |
2638 | intf->my_dev_name = kmalloc(size+1, GFP_KERNEL); |
2639 | if (!intf->my_dev_name) { | |
759643b8 CM |
2640 | kfree(intf->sysfs_name); |
2641 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2642 | rv = -ENOMEM; |
2643 | printk(KERN_ERR | |
2644 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2645 | rv); | |
2646 | goto out_err; | |
2647 | } | |
759643b8 | 2648 | snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum); |
50c812b2 CM |
2649 | |
2650 | rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj, | |
2651 | intf->my_dev_name); | |
2652 | if (rv) { | |
759643b8 CM |
2653 | kfree(intf->sysfs_name); |
2654 | intf->sysfs_name = NULL; | |
50c812b2 CM |
2655 | kfree(intf->my_dev_name); |
2656 | intf->my_dev_name = NULL; | |
2657 | printk(KERN_ERR | |
2658 | "ipmi_msghandler:" | |
2659 | " Unable to create symlink to bmc: %d\n", | |
2660 | rv); | |
2661 | goto out_err; | |
2662 | } | |
2663 | ||
2664 | return 0; | |
2665 | ||
2666 | out_err: | |
2667 | ipmi_bmc_unregister(intf); | |
2668 | return rv; | |
2669 | } | |
2670 | ||
2671 | static int | |
2672 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2673 | { | |
2674 | struct kernel_ipmi_msg msg; | |
2675 | struct ipmi_system_interface_addr si; | |
2676 | ||
2677 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2678 | si.channel = IPMI_BMC_CHANNEL; | |
2679 | si.lun = 0; | |
2680 | ||
2681 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2682 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2683 | msg.data = NULL; | |
2684 | msg.data_len = 0; | |
2685 | return i_ipmi_request(NULL, | |
2686 | intf, | |
2687 | (struct ipmi_addr *) &si, | |
2688 | 0, | |
2689 | &msg, | |
2690 | intf, | |
2691 | NULL, | |
2692 | NULL, | |
2693 | 0, | |
2694 | intf->channels[0].address, | |
2695 | intf->channels[0].lun, | |
2696 | -1, 0); | |
2697 | } | |
2698 | ||
2699 | static void | |
2700 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2701 | { | |
2702 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2703 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2704 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2705 | /* Not for me */ | |
2706 | return; | |
2707 | ||
2708 | if (msg->msg.data[0] != 0) { | |
2709 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2710 | intf->bmc->guid_set = 0; | |
2711 | goto out; | |
2712 | } | |
2713 | ||
2714 | if (msg->msg.data_len < 17) { | |
2715 | intf->bmc->guid_set = 0; | |
2716 | printk(KERN_WARNING PFX | |
2717 | "guid_handler: The GUID response from the BMC was too" | |
2718 | " short, it was %d but should have been 17. Assuming" | |
2719 | " GUID is not available.\n", | |
2720 | msg->msg.data_len); | |
2721 | goto out; | |
2722 | } | |
2723 | ||
2724 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2725 | intf->bmc->guid_set = 1; | |
2726 | out: | |
2727 | wake_up(&intf->waitq); | |
2728 | } | |
2729 | ||
2730 | static void | |
2731 | get_guid(ipmi_smi_t intf) | |
2732 | { | |
2733 | int rv; | |
2734 | ||
2735 | intf->bmc->guid_set = 0x2; | |
2736 | intf->null_user_handler = guid_handler; | |
2737 | rv = send_guid_cmd(intf, 0); | |
2738 | if (rv) | |
2739 | /* Send failed, no GUID available. */ | |
2740 | intf->bmc->guid_set = 0; | |
2741 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2742 | intf->null_user_handler = NULL; | |
2743 | } | |
2744 | ||
1da177e4 LT |
2745 | static int |
2746 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2747 | { | |
2748 | struct kernel_ipmi_msg msg; | |
2749 | unsigned char data[1]; | |
2750 | struct ipmi_system_interface_addr si; | |
2751 | ||
2752 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2753 | si.channel = IPMI_BMC_CHANNEL; | |
2754 | si.lun = 0; | |
2755 | ||
2756 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2757 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2758 | msg.data = data; | |
2759 | msg.data_len = 1; | |
2760 | data[0] = chan; | |
2761 | return i_ipmi_request(NULL, | |
2762 | intf, | |
2763 | (struct ipmi_addr *) &si, | |
2764 | 0, | |
2765 | &msg, | |
56a55ec6 | 2766 | intf, |
1da177e4 LT |
2767 | NULL, |
2768 | NULL, | |
2769 | 0, | |
c14979b9 CM |
2770 | intf->channels[0].address, |
2771 | intf->channels[0].lun, | |
1da177e4 LT |
2772 | -1, 0); |
2773 | } | |
2774 | ||
2775 | static void | |
56a55ec6 | 2776 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2777 | { |
2778 | int rv = 0; | |
2779 | int chan; | |
2780 | ||
56a55ec6 CM |
2781 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2782 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2783 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2784 | /* It's the one we want */ |
56a55ec6 | 2785 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2786 | /* Got an error from the channel, just go on. */ |
2787 | ||
56a55ec6 | 2788 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2789 | /* |
2790 | * If the MC does not support this | |
2791 | * command, that is legal. We just | |
2792 | * assume it has one IPMB at channel | |
2793 | * zero. | |
2794 | */ | |
1da177e4 LT |
2795 | intf->channels[0].medium |
2796 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2797 | intf->channels[0].protocol | |
2798 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
2799 | rv = -ENOSYS; | |
2800 | ||
2801 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2802 | wake_up(&intf->waitq); | |
2803 | goto out; | |
2804 | } | |
2805 | goto next_channel; | |
2806 | } | |
56a55ec6 | 2807 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2808 | /* Message not big enough, just go on. */ |
2809 | goto next_channel; | |
2810 | } | |
2811 | chan = intf->curr_channel; | |
56a55ec6 CM |
2812 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2813 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2814 | |
c70d7499 | 2815 | next_channel: |
1da177e4 LT |
2816 | intf->curr_channel++; |
2817 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2818 | wake_up(&intf->waitq); | |
2819 | else | |
2820 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2821 | ||
2822 | if (rv) { | |
2823 | /* Got an error somehow, just give up. */ | |
2824 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2825 | wake_up(&intf->waitq); | |
2826 | ||
2827 | printk(KERN_WARNING PFX | |
2828 | "Error sending channel information: %d\n", | |
2829 | rv); | |
2830 | } | |
2831 | } | |
2832 | out: | |
2833 | return; | |
2834 | } | |
2835 | ||
895dcfd1 | 2836 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 2837 | { |
fcfa4724 CM |
2838 | if (intf->handlers->poll) |
2839 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
2840 | /* In case something came in */ |
2841 | handle_new_recv_msgs(intf); | |
fcfa4724 | 2842 | } |
895dcfd1 CM |
2843 | |
2844 | void ipmi_poll_interface(ipmi_user_t user) | |
2845 | { | |
2846 | ipmi_poll(user->intf); | |
fcfa4724 | 2847 | } |
c70d7499 | 2848 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2849 | |
1da177e4 LT |
2850 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, |
2851 | void *send_info, | |
50c812b2 CM |
2852 | struct ipmi_device_id *device_id, |
2853 | struct device *si_dev, | |
759643b8 | 2854 | const char *sysfs_name, |
453823ba | 2855 | unsigned char slave_addr) |
1da177e4 LT |
2856 | { |
2857 | int i, j; | |
2858 | int rv; | |
393d2cc3 | 2859 | ipmi_smi_t intf; |
bca0324d | 2860 | ipmi_smi_t tintf; |
bca0324d | 2861 | struct list_head *link; |
1da177e4 | 2862 | |
c70d7499 CM |
2863 | /* |
2864 | * Make sure the driver is actually initialized, this handles | |
2865 | * problems with initialization order. | |
2866 | */ | |
1da177e4 LT |
2867 | if (!initialized) { |
2868 | rv = ipmi_init_msghandler(); | |
2869 | if (rv) | |
2870 | return rv; | |
c70d7499 CM |
2871 | /* |
2872 | * The init code doesn't return an error if it was turned | |
2873 | * off, but it won't initialize. Check that. | |
2874 | */ | |
1da177e4 LT |
2875 | if (!initialized) |
2876 | return -ENODEV; | |
2877 | } | |
2878 | ||
dd00cc48 | 2879 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2880 | if (!intf) |
1da177e4 | 2881 | return -ENOMEM; |
b2c03941 CM |
2882 | |
2883 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2884 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2885 | ||
50c812b2 CM |
2886 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2887 | if (!intf->bmc) { | |
2888 | kfree(intf); | |
2889 | return -ENOMEM; | |
2890 | } | |
bca0324d | 2891 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2892 | kref_init(&intf->refcount); |
50c812b2 CM |
2893 | intf->bmc->id = *device_id; |
2894 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2895 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2896 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2897 | intf->channels[j].lun = 2; | |
2898 | } | |
2899 | if (slave_addr != 0) | |
2900 | intf->channels[0].address = slave_addr; | |
2901 | INIT_LIST_HEAD(&intf->users); | |
2902 | intf->handlers = handlers; | |
2903 | intf->send_info = send_info; | |
2904 | spin_lock_init(&intf->seq_lock); | |
2905 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2906 | intf->seq_table[j].inuse = 0; | |
2907 | intf->seq_table[j].seqid = 0; | |
2908 | } | |
2909 | intf->curr_seq = 0; | |
2910 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2911 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 CM |
2912 | #endif |
2913 | spin_lock_init(&intf->waiting_msgs_lock); | |
2914 | INIT_LIST_HEAD(&intf->waiting_msgs); | |
7adf579c CM |
2915 | tasklet_init(&intf->recv_tasklet, |
2916 | smi_recv_tasklet, | |
2917 | (unsigned long) intf); | |
2918 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
393d2cc3 | 2919 | spin_lock_init(&intf->events_lock); |
89986496 CM |
2920 | atomic_set(&intf->event_waiters, 0); |
2921 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
2922 | INIT_LIST_HEAD(&intf->waiting_events); |
2923 | intf->waiting_events_count = 0; | |
d6dfd131 | 2924 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2925 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2926 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2927 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2928 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2929 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2930 | |
393d2cc3 | 2931 | intf->proc_dir = NULL; |
1da177e4 | 2932 | |
b2c03941 | 2933 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2934 | mutex_lock(&ipmi_interfaces_mutex); |
2935 | /* Look for a hole in the numbers. */ | |
2936 | i = 0; | |
2937 | link = &ipmi_interfaces; | |
2938 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2939 | if (tintf->intf_num != i) { | |
2940 | link = &tintf->link; | |
1da177e4 LT |
2941 | break; |
2942 | } | |
bca0324d | 2943 | i++; |
1da177e4 | 2944 | } |
bca0324d CM |
2945 | /* Add the new interface in numeric order. */ |
2946 | if (i == 0) | |
2947 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2948 | else | |
2949 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2950 | |
453823ba CM |
2951 | rv = handlers->start_processing(send_info, intf); |
2952 | if (rv) | |
2953 | goto out; | |
1da177e4 | 2954 | |
50c812b2 CM |
2955 | get_guid(intf); |
2956 | ||
b2c03941 | 2957 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2958 | || ((intf->ipmi_version_major == 1) |
2959 | && (intf->ipmi_version_minor >= 5))) { | |
2960 | /* | |
2961 | * Start scanning the channels to see what is | |
2962 | * available. | |
2963 | */ | |
393d2cc3 CM |
2964 | intf->null_user_handler = channel_handler; |
2965 | intf->curr_channel = 0; | |
2966 | rv = send_channel_info_cmd(intf, 0); | |
2967 | if (rv) | |
2968 | goto out; | |
1da177e4 | 2969 | |
393d2cc3 CM |
2970 | /* Wait for the channel info to be read. */ |
2971 | wait_event(intf->waitq, | |
2972 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2973 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2974 | } else { |
2975 | /* Assume a single IPMB channel at zero. */ | |
2976 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2977 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
9a2845c4 | 2978 | intf->curr_channel = IPMI_MAX_CHANNELS; |
1da177e4 LT |
2979 | } |
2980 | ||
393d2cc3 CM |
2981 | if (rv == 0) |
2982 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2983 | |
759643b8 | 2984 | rv = ipmi_bmc_register(intf, i, sysfs_name); |
50c812b2 | 2985 | |
393d2cc3 | 2986 | out: |
1da177e4 | 2987 | if (rv) { |
393d2cc3 CM |
2988 | if (intf->proc_dir) |
2989 | remove_proc_entries(intf); | |
b2c03941 | 2990 | intf->handlers = NULL; |
bca0324d CM |
2991 | list_del_rcu(&intf->link); |
2992 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2993 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2994 | synchronize_rcu(); |
393d2cc3 | 2995 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2996 | } else { |
78ba2faf CM |
2997 | /* |
2998 | * Keep memory order straight for RCU readers. Make | |
2999 | * sure everything else is committed to memory before | |
3000 | * setting intf_num to mark the interface valid. | |
3001 | */ | |
3002 | smp_wmb(); | |
bca0324d CM |
3003 | intf->intf_num = i; |
3004 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 3005 | /* After this point the interface is legal to use. */ |
50c812b2 | 3006 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 3007 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
3008 | } |
3009 | ||
3010 | return rv; | |
3011 | } | |
c70d7499 | 3012 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 3013 | |
b2c03941 CM |
3014 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
3015 | { | |
3016 | int i; | |
3017 | struct seq_table *ent; | |
3018 | ||
3019 | /* No need for locks, the interface is down. */ | |
3020 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
3021 | ent = &(intf->seq_table[i]); | |
3022 | if (!ent->inuse) | |
3023 | continue; | |
3024 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
3025 | } | |
3026 | } | |
3027 | ||
1da177e4 LT |
3028 | int ipmi_unregister_smi(ipmi_smi_t intf) |
3029 | { | |
1da177e4 | 3030 | struct ipmi_smi_watcher *w; |
b2c03941 | 3031 | int intf_num = intf->intf_num; |
1da177e4 | 3032 | |
50c812b2 CM |
3033 | ipmi_bmc_unregister(intf); |
3034 | ||
b2c03941 | 3035 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 3036 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 CM |
3037 | intf->intf_num = -1; |
3038 | intf->handlers = NULL; | |
bca0324d CM |
3039 | list_del_rcu(&intf->link); |
3040 | mutex_unlock(&ipmi_interfaces_mutex); | |
3041 | synchronize_rcu(); | |
1da177e4 | 3042 | |
b2c03941 CM |
3043 | cleanup_smi_msgs(intf); |
3044 | ||
393d2cc3 | 3045 | remove_proc_entries(intf); |
1da177e4 | 3046 | |
c70d7499 CM |
3047 | /* |
3048 | * Call all the watcher interfaces to tell them that | |
3049 | * an interface is gone. | |
3050 | */ | |
393d2cc3 | 3051 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3052 | w->smi_gone(intf_num); |
3053 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3054 | |
393d2cc3 | 3055 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3056 | return 0; |
3057 | } | |
c70d7499 | 3058 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3059 | |
3060 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3061 | struct ipmi_smi_msg *msg) | |
3062 | { | |
3063 | struct ipmi_ipmb_addr ipmb_addr; | |
3064 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3065 | |
c70d7499 CM |
3066 | /* |
3067 | * This is 11, not 10, because the response must contain a | |
3068 | * completion code. | |
3069 | */ | |
1da177e4 LT |
3070 | if (msg->rsp_size < 11) { |
3071 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3072 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3073 | return 0; |
3074 | } | |
3075 | ||
3076 | if (msg->rsp[2] != 0) { | |
3077 | /* An error getting the response, just ignore it. */ | |
3078 | return 0; | |
3079 | } | |
3080 | ||
3081 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3082 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3083 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3084 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3085 | ||
c70d7499 CM |
3086 | /* |
3087 | * It's a response from a remote entity. Look up the sequence | |
3088 | * number and handle the response. | |
3089 | */ | |
1da177e4 LT |
3090 | if (intf_find_seq(intf, |
3091 | msg->rsp[7] >> 2, | |
3092 | msg->rsp[3] & 0x0f, | |
3093 | msg->rsp[8], | |
3094 | (msg->rsp[4] >> 2) & (~1), | |
3095 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3096 | &recv_msg)) { |
3097 | /* | |
3098 | * We were unable to find the sequence number, | |
3099 | * so just nuke the message. | |
3100 | */ | |
b2655f26 | 3101 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3102 | return 0; |
3103 | } | |
3104 | ||
3105 | memcpy(recv_msg->msg_data, | |
3106 | &(msg->rsp[9]), | |
3107 | msg->rsp_size - 9); | |
c70d7499 CM |
3108 | /* |
3109 | * The other fields matched, so no need to set them, except | |
3110 | * for netfn, which needs to be the response that was | |
3111 | * returned, not the request value. | |
3112 | */ | |
1da177e4 LT |
3113 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3114 | recv_msg->msg.data = recv_msg->msg_data; | |
3115 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3116 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3117 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3118 | deliver_response(recv_msg); |
3119 | ||
3120 | return 0; | |
3121 | } | |
3122 | ||
3123 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3124 | struct ipmi_smi_msg *msg) | |
3125 | { | |
393d2cc3 CM |
3126 | struct cmd_rcvr *rcvr; |
3127 | int rv = 0; | |
3128 | unsigned char netfn; | |
3129 | unsigned char cmd; | |
c69c3127 | 3130 | unsigned char chan; |
393d2cc3 CM |
3131 | ipmi_user_t user = NULL; |
3132 | struct ipmi_ipmb_addr *ipmb_addr; | |
3133 | struct ipmi_recv_msg *recv_msg; | |
b2c03941 | 3134 | struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
3135 | |
3136 | if (msg->rsp_size < 10) { | |
3137 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3138 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3139 | return 0; |
3140 | } | |
3141 | ||
3142 | if (msg->rsp[2] != 0) { | |
3143 | /* An error getting the response, just ignore it. */ | |
3144 | return 0; | |
3145 | } | |
3146 | ||
3147 | netfn = msg->rsp[4] >> 2; | |
3148 | cmd = msg->rsp[8]; | |
c69c3127 | 3149 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3150 | |
e61fb5b6 | 3151 | rcu_read_lock(); |
c69c3127 | 3152 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3153 | if (rcvr) { |
3154 | user = rcvr->user; | |
3155 | kref_get(&user->refcount); | |
3156 | } else | |
3157 | user = NULL; | |
e61fb5b6 | 3158 | rcu_read_unlock(); |
1da177e4 LT |
3159 | |
3160 | if (user == NULL) { | |
3161 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3162 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3163 | |
3164 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3165 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3166 | msg->data[2] = msg->rsp[3]; | |
3167 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3168 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3169 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3170 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3171 | /* rqseq/lun */ |
3172 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3173 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3174 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3175 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3176 | msg->data_size = 11; | |
3177 | ||
3178 | #ifdef DEBUG_MSGING | |
3179 | { | |
3180 | int m; | |
3181 | printk("Invalid command:"); | |
e8b33617 | 3182 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3183 | printk(" %2.2x", msg->data[m]); |
3184 | printk("\n"); | |
3185 | } | |
3186 | #endif | |
b2c03941 CM |
3187 | rcu_read_lock(); |
3188 | handlers = intf->handlers; | |
3189 | if (handlers) { | |
3190 | handlers->sender(intf->send_info, msg, 0); | |
c70d7499 CM |
3191 | /* |
3192 | * We used the message, so return the value | |
3193 | * that causes it to not be freed or | |
3194 | * queued. | |
3195 | */ | |
b2c03941 CM |
3196 | rv = -1; |
3197 | } | |
3198 | rcu_read_unlock(); | |
1da177e4 LT |
3199 | } else { |
3200 | /* Deliver the message to the user. */ | |
b2655f26 | 3201 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3202 | |
3203 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3204 | if (!recv_msg) { |
c70d7499 CM |
3205 | /* |
3206 | * We couldn't allocate memory for the | |
3207 | * message, so requeue it for handling | |
3208 | * later. | |
3209 | */ | |
1da177e4 | 3210 | rv = 1; |
393d2cc3 | 3211 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3212 | } else { |
3213 | /* Extract the source address from the data. */ | |
3214 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3215 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3216 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3217 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3218 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3219 | ||
c70d7499 CM |
3220 | /* |
3221 | * Extract the rest of the message information | |
3222 | * from the IPMB header. | |
3223 | */ | |
1da177e4 LT |
3224 | recv_msg->user = user; |
3225 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3226 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3227 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3228 | recv_msg->msg.cmd = msg->rsp[8]; | |
3229 | recv_msg->msg.data = recv_msg->msg_data; | |
3230 | ||
c70d7499 CM |
3231 | /* |
3232 | * We chop off 10, not 9 bytes because the checksum | |
3233 | * at the end also needs to be removed. | |
3234 | */ | |
1da177e4 LT |
3235 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3236 | memcpy(recv_msg->msg_data, | |
3237 | &(msg->rsp[9]), | |
3238 | msg->rsp_size - 10); | |
3239 | deliver_response(recv_msg); | |
3240 | } | |
3241 | } | |
3242 | ||
3243 | return rv; | |
3244 | } | |
3245 | ||
3246 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3247 | struct ipmi_smi_msg *msg) | |
3248 | { | |
3249 | struct ipmi_lan_addr lan_addr; | |
3250 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3251 | |
3252 | ||
c70d7499 CM |
3253 | /* |
3254 | * This is 13, not 12, because the response must contain a | |
3255 | * completion code. | |
3256 | */ | |
1da177e4 LT |
3257 | if (msg->rsp_size < 13) { |
3258 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3259 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3260 | return 0; |
3261 | } | |
3262 | ||
3263 | if (msg->rsp[2] != 0) { | |
3264 | /* An error getting the response, just ignore it. */ | |
3265 | return 0; | |
3266 | } | |
3267 | ||
3268 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3269 | lan_addr.session_handle = msg->rsp[4]; | |
3270 | lan_addr.remote_SWID = msg->rsp[8]; | |
3271 | lan_addr.local_SWID = msg->rsp[5]; | |
3272 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3273 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3274 | lan_addr.lun = msg->rsp[9] & 3; | |
3275 | ||
c70d7499 CM |
3276 | /* |
3277 | * It's a response from a remote entity. Look up the sequence | |
3278 | * number and handle the response. | |
3279 | */ | |
1da177e4 LT |
3280 | if (intf_find_seq(intf, |
3281 | msg->rsp[9] >> 2, | |
3282 | msg->rsp[3] & 0x0f, | |
3283 | msg->rsp[10], | |
3284 | (msg->rsp[6] >> 2) & (~1), | |
3285 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3286 | &recv_msg)) { |
3287 | /* | |
3288 | * We were unable to find the sequence number, | |
3289 | * so just nuke the message. | |
3290 | */ | |
b2655f26 | 3291 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3292 | return 0; |
3293 | } | |
3294 | ||
3295 | memcpy(recv_msg->msg_data, | |
3296 | &(msg->rsp[11]), | |
3297 | msg->rsp_size - 11); | |
c70d7499 CM |
3298 | /* |
3299 | * The other fields matched, so no need to set them, except | |
3300 | * for netfn, which needs to be the response that was | |
3301 | * returned, not the request value. | |
3302 | */ | |
1da177e4 LT |
3303 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3304 | recv_msg->msg.data = recv_msg->msg_data; | |
3305 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3306 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3307 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3308 | deliver_response(recv_msg); |
3309 | ||
3310 | return 0; | |
3311 | } | |
3312 | ||
3313 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3314 | struct ipmi_smi_msg *msg) | |
3315 | { | |
393d2cc3 CM |
3316 | struct cmd_rcvr *rcvr; |
3317 | int rv = 0; | |
3318 | unsigned char netfn; | |
3319 | unsigned char cmd; | |
c69c3127 | 3320 | unsigned char chan; |
393d2cc3 CM |
3321 | ipmi_user_t user = NULL; |
3322 | struct ipmi_lan_addr *lan_addr; | |
3323 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3324 | |
3325 | if (msg->rsp_size < 12) { | |
3326 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3327 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3328 | return 0; |
3329 | } | |
3330 | ||
3331 | if (msg->rsp[2] != 0) { | |
3332 | /* An error getting the response, just ignore it. */ | |
3333 | return 0; | |
3334 | } | |
3335 | ||
3336 | netfn = msg->rsp[6] >> 2; | |
3337 | cmd = msg->rsp[10]; | |
c69c3127 | 3338 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3339 | |
e61fb5b6 | 3340 | rcu_read_lock(); |
c69c3127 | 3341 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3342 | if (rcvr) { |
3343 | user = rcvr->user; | |
3344 | kref_get(&user->refcount); | |
3345 | } else | |
3346 | user = NULL; | |
e61fb5b6 | 3347 | rcu_read_unlock(); |
1da177e4 LT |
3348 | |
3349 | if (user == NULL) { | |
393d2cc3 | 3350 | /* We didn't find a user, just give up. */ |
b2655f26 | 3351 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3352 | |
c70d7499 CM |
3353 | /* |
3354 | * Don't do anything with these messages, just allow | |
3355 | * them to be freed. | |
3356 | */ | |
3357 | rv = 0; | |
1da177e4 LT |
3358 | } else { |
3359 | /* Deliver the message to the user. */ | |
b2655f26 | 3360 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3361 | |
3362 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3363 | if (!recv_msg) { |
c70d7499 CM |
3364 | /* |
3365 | * We couldn't allocate memory for the | |
3366 | * message, so requeue it for handling later. | |
3367 | */ | |
1da177e4 | 3368 | rv = 1; |
393d2cc3 | 3369 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3370 | } else { |
3371 | /* Extract the source address from the data. */ | |
3372 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3373 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3374 | lan_addr->session_handle = msg->rsp[4]; | |
3375 | lan_addr->remote_SWID = msg->rsp[8]; | |
3376 | lan_addr->local_SWID = msg->rsp[5]; | |
3377 | lan_addr->lun = msg->rsp[9] & 3; | |
3378 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3379 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3380 | ||
c70d7499 CM |
3381 | /* |
3382 | * Extract the rest of the message information | |
3383 | * from the IPMB header. | |
3384 | */ | |
1da177e4 LT |
3385 | recv_msg->user = user; |
3386 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3387 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3388 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3389 | recv_msg->msg.cmd = msg->rsp[10]; | |
3390 | recv_msg->msg.data = recv_msg->msg_data; | |
3391 | ||
c70d7499 CM |
3392 | /* |
3393 | * We chop off 12, not 11 bytes because the checksum | |
3394 | * at the end also needs to be removed. | |
3395 | */ | |
1da177e4 LT |
3396 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3397 | memcpy(recv_msg->msg_data, | |
3398 | &(msg->rsp[11]), | |
3399 | msg->rsp_size - 12); | |
3400 | deliver_response(recv_msg); | |
3401 | } | |
3402 | } | |
3403 | ||
3404 | return rv; | |
3405 | } | |
3406 | ||
4dec302f | 3407 | /* |
3408 | * This routine will handle "Get Message" command responses with | |
3409 | * channels that use an OEM Medium. The message format belongs to | |
3410 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3411 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3412 | */ | |
3413 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3414 | struct ipmi_smi_msg *msg) | |
3415 | { | |
3416 | struct cmd_rcvr *rcvr; | |
3417 | int rv = 0; | |
3418 | unsigned char netfn; | |
3419 | unsigned char cmd; | |
3420 | unsigned char chan; | |
3421 | ipmi_user_t user = NULL; | |
3422 | struct ipmi_system_interface_addr *smi_addr; | |
3423 | struct ipmi_recv_msg *recv_msg; | |
3424 | ||
3425 | /* | |
3426 | * We expect the OEM SW to perform error checking | |
3427 | * so we just do some basic sanity checks | |
3428 | */ | |
3429 | if (msg->rsp_size < 4) { | |
3430 | /* Message not big enough, just ignore it. */ | |
3431 | ipmi_inc_stat(intf, invalid_commands); | |
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | if (msg->rsp[2] != 0) { | |
3436 | /* An error getting the response, just ignore it. */ | |
3437 | return 0; | |
3438 | } | |
3439 | ||
3440 | /* | |
3441 | * This is an OEM Message so the OEM needs to know how | |
3442 | * handle the message. We do no interpretation. | |
3443 | */ | |
3444 | netfn = msg->rsp[0] >> 2; | |
3445 | cmd = msg->rsp[1]; | |
3446 | chan = msg->rsp[3] & 0xf; | |
3447 | ||
3448 | rcu_read_lock(); | |
3449 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3450 | if (rcvr) { | |
3451 | user = rcvr->user; | |
3452 | kref_get(&user->refcount); | |
3453 | } else | |
3454 | user = NULL; | |
3455 | rcu_read_unlock(); | |
3456 | ||
3457 | if (user == NULL) { | |
3458 | /* We didn't find a user, just give up. */ | |
3459 | ipmi_inc_stat(intf, unhandled_commands); | |
3460 | ||
3461 | /* | |
3462 | * Don't do anything with these messages, just allow | |
3463 | * them to be freed. | |
3464 | */ | |
3465 | ||
3466 | rv = 0; | |
3467 | } else { | |
3468 | /* Deliver the message to the user. */ | |
3469 | ipmi_inc_stat(intf, handled_commands); | |
3470 | ||
3471 | recv_msg = ipmi_alloc_recv_msg(); | |
3472 | if (!recv_msg) { | |
3473 | /* | |
3474 | * We couldn't allocate memory for the | |
3475 | * message, so requeue it for handling | |
3476 | * later. | |
3477 | */ | |
3478 | rv = 1; | |
3479 | kref_put(&user->refcount, free_user); | |
3480 | } else { | |
3481 | /* | |
3482 | * OEM Messages are expected to be delivered via | |
3483 | * the system interface to SMS software. We might | |
3484 | * need to visit this again depending on OEM | |
3485 | * requirements | |
3486 | */ | |
3487 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3488 | &(recv_msg->addr)); | |
3489 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3490 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3491 | smi_addr->lun = msg->rsp[0] & 3; | |
3492 | ||
3493 | recv_msg->user = user; | |
3494 | recv_msg->user_msg_data = NULL; | |
3495 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
3496 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3497 | recv_msg->msg.cmd = msg->rsp[1]; | |
3498 | recv_msg->msg.data = recv_msg->msg_data; | |
3499 | ||
3500 | /* | |
3501 | * The message starts at byte 4 which follows the | |
3502 | * the Channel Byte in the "GET MESSAGE" command | |
3503 | */ | |
3504 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
3505 | memcpy(recv_msg->msg_data, | |
3506 | &(msg->rsp[4]), | |
3507 | msg->rsp_size - 4); | |
3508 | deliver_response(recv_msg); | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | return rv; | |
3513 | } | |
3514 | ||
1da177e4 LT |
3515 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
3516 | struct ipmi_smi_msg *msg) | |
3517 | { | |
3518 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3519 | |
1da177e4 LT |
3520 | recv_msg->msgid = 0; |
3521 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3522 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3523 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3524 | smi_addr->lun = msg->rsp[0] & 3; | |
3525 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3526 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3527 | recv_msg->msg.cmd = msg->rsp[1]; | |
3528 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3529 | recv_msg->msg.data = recv_msg->msg_data; | |
3530 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3531 | } | |
3532 | ||
1da177e4 LT |
3533 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3534 | struct ipmi_smi_msg *msg) | |
3535 | { | |
3536 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3537 | struct list_head msgs; | |
3538 | ipmi_user_t user; | |
3539 | int rv = 0; | |
3540 | int deliver_count = 0; | |
3541 | unsigned long flags; | |
3542 | ||
3543 | if (msg->rsp_size < 19) { | |
3544 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3545 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3546 | return 0; |
3547 | } | |
3548 | ||
3549 | if (msg->rsp[2] != 0) { | |
3550 | /* An error getting the event, just ignore it. */ | |
3551 | return 0; | |
3552 | } | |
3553 | ||
3554 | INIT_LIST_HEAD(&msgs); | |
3555 | ||
393d2cc3 | 3556 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3557 | |
b2655f26 | 3558 | ipmi_inc_stat(intf, events); |
1da177e4 | 3559 | |
c70d7499 CM |
3560 | /* |
3561 | * Allocate and fill in one message for every user that is | |
3562 | * getting events. | |
3563 | */ | |
393d2cc3 CM |
3564 | rcu_read_lock(); |
3565 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3566 | if (!user->gets_events) |
1da177e4 LT |
3567 | continue; |
3568 | ||
3569 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3570 | if (!recv_msg) { |
393d2cc3 | 3571 | rcu_read_unlock(); |
8a3628d5 CM |
3572 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3573 | link) { | |
1da177e4 LT |
3574 | list_del(&recv_msg->link); |
3575 | ipmi_free_recv_msg(recv_msg); | |
3576 | } | |
c70d7499 CM |
3577 | /* |
3578 | * We couldn't allocate memory for the | |
3579 | * message, so requeue it for handling | |
3580 | * later. | |
3581 | */ | |
1da177e4 LT |
3582 | rv = 1; |
3583 | goto out; | |
3584 | } | |
3585 | ||
3586 | deliver_count++; | |
3587 | ||
3588 | copy_event_into_recv_msg(recv_msg, msg); | |
3589 | recv_msg->user = user; | |
393d2cc3 | 3590 | kref_get(&user->refcount); |
1da177e4 LT |
3591 | list_add_tail(&(recv_msg->link), &msgs); |
3592 | } | |
393d2cc3 | 3593 | rcu_read_unlock(); |
1da177e4 LT |
3594 | |
3595 | if (deliver_count) { | |
3596 | /* Now deliver all the messages. */ | |
3597 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3598 | list_del(&recv_msg->link); | |
3599 | deliver_response(recv_msg); | |
3600 | } | |
3601 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3602 | /* |
3603 | * No one to receive the message, put it in queue if there's | |
3604 | * not already too many things in the queue. | |
3605 | */ | |
1da177e4 | 3606 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3607 | if (!recv_msg) { |
c70d7499 CM |
3608 | /* |
3609 | * We couldn't allocate memory for the | |
3610 | * message, so requeue it for handling | |
3611 | * later. | |
3612 | */ | |
1da177e4 LT |
3613 | rv = 1; |
3614 | goto out; | |
3615 | } | |
3616 | ||
3617 | copy_event_into_recv_msg(recv_msg, msg); | |
3618 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3619 | intf->waiting_events_count++; |
87ebd06f | 3620 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3621 | /* |
3622 | * There's too many things in the queue, discard this | |
3623 | * message. | |
3624 | */ | |
87ebd06f CM |
3625 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3626 | " incoming events\n"); | |
3627 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3628 | } |
3629 | ||
3630 | out: | |
3631 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3632 | ||
3633 | return rv; | |
3634 | } | |
3635 | ||
3636 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3637 | struct ipmi_smi_msg *msg) | |
3638 | { | |
3639 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3640 | struct ipmi_user *user; |
1da177e4 LT |
3641 | |
3642 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3643 | if (recv_msg == NULL) { |
3644 | printk(KERN_WARNING | |
3645 | "IPMI message received with no owner. This\n" | |
3646 | "could be because of a malformed message, or\n" | |
3647 | "because of a hardware error. Contact your\n" | |
3648 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3649 | return 0; |
3650 | } | |
1da177e4 | 3651 | |
393d2cc3 | 3652 | user = recv_msg->user; |
1da177e4 | 3653 | /* Make sure the user still exists. */ |
393d2cc3 | 3654 | if (user && !user->valid) { |
56a55ec6 | 3655 | /* The user for the message went away, so give up. */ |
b2655f26 | 3656 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3657 | ipmi_free_recv_msg(recv_msg); |
3658 | } else { | |
3659 | struct ipmi_system_interface_addr *smi_addr; | |
3660 | ||
b2655f26 | 3661 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3662 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3663 | recv_msg->msgid = msg->msgid; | |
3664 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3665 | &(recv_msg->addr)); | |
3666 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3667 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3668 | smi_addr->lun = msg->rsp[0] & 3; | |
3669 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3670 | recv_msg->msg.cmd = msg->rsp[1]; | |
3671 | memcpy(recv_msg->msg_data, | |
3672 | &(msg->rsp[2]), | |
3673 | msg->rsp_size - 2); | |
3674 | recv_msg->msg.data = recv_msg->msg_data; | |
3675 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3676 | deliver_response(recv_msg); | |
3677 | } | |
3678 | ||
3679 | return 0; | |
3680 | } | |
3681 | ||
c70d7499 | 3682 | /* |
7adf579c | 3683 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
3684 | * 0 if the message should be freed, or -1 if the message should not |
3685 | * be freed or requeued. | |
3686 | */ | |
7adf579c | 3687 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
3688 | struct ipmi_smi_msg *msg) |
3689 | { | |
3690 | int requeue; | |
3691 | int chan; | |
3692 | ||
3693 | #ifdef DEBUG_MSGING | |
3694 | int m; | |
3695 | printk("Recv:"); | |
e8b33617 | 3696 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3697 | printk(" %2.2x", msg->rsp[m]); |
3698 | printk("\n"); | |
3699 | #endif | |
3700 | if (msg->rsp_size < 2) { | |
3701 | /* Message is too small to be correct. */ | |
3702 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3703 | " for netfn %x cmd %x, got %d bytes\n", | |
3704 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3705 | ||
3706 | /* Generate an error response for the message. */ | |
3707 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3708 | msg->rsp[1] = msg->data[1]; | |
3709 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3710 | msg->rsp_size = 3; | |
c70d7499 CM |
3711 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3712 | || (msg->rsp[1] != msg->data[1])) { | |
3713 | /* | |
3714 | * The NetFN and Command in the response is not even | |
3715 | * marginally correct. | |
3716 | */ | |
1da177e4 LT |
3717 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3718 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3719 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3720 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3721 | ||
3722 | /* Generate an error response for the message. */ | |
3723 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3724 | msg->rsp[1] = msg->data[1]; | |
3725 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3726 | msg->rsp_size = 3; | |
3727 | } | |
3728 | ||
3729 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3730 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3731 | && (msg->user_data != NULL)) { |
3732 | /* | |
3733 | * It's a response to a response we sent. For this we | |
3734 | * deliver a send message response to the user. | |
3735 | */ | |
393d2cc3 | 3736 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3737 | |
3738 | requeue = 0; | |
3739 | if (msg->rsp_size < 2) | |
3740 | /* Message is too small to be correct. */ | |
3741 | goto out; | |
3742 | ||
3743 | chan = msg->data[2] & 0x0f; | |
3744 | if (chan >= IPMI_MAX_CHANNELS) | |
3745 | /* Invalid channel number */ | |
3746 | goto out; | |
3747 | ||
393d2cc3 CM |
3748 | if (!recv_msg) |
3749 | goto out; | |
3750 | ||
3751 | /* Make sure the user still exists. */ | |
3752 | if (!recv_msg->user || !recv_msg->user->valid) | |
3753 | goto out; | |
3754 | ||
3755 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3756 | recv_msg->msg.data = recv_msg->msg_data; | |
3757 | recv_msg->msg.data_len = 1; | |
3758 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3759 | deliver_response(recv_msg); | |
1da177e4 | 3760 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3761 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3762 | /* It's from the receive queue. */ |
3763 | chan = msg->rsp[3] & 0xf; | |
3764 | if (chan >= IPMI_MAX_CHANNELS) { | |
3765 | /* Invalid channel number */ | |
3766 | requeue = 0; | |
3767 | goto out; | |
3768 | } | |
3769 | ||
4dec302f | 3770 | /* |
9a2845c4 CM |
3771 | * We need to make sure the channels have been initialized. |
3772 | * The channel_handler routine will set the "curr_channel" | |
3773 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
3774 | * channels for this interface have been initialized. | |
3775 | */ | |
4dec302f | 3776 | if (intf->curr_channel < IPMI_MAX_CHANNELS) { |
9a2845c4 | 3777 | requeue = 0; /* Throw the message away */ |
4dec302f | 3778 | goto out; |
3779 | } | |
3780 | ||
1da177e4 LT |
3781 | switch (intf->channels[chan].medium) { |
3782 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3783 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3784 | /* |
3785 | * It's a response, so find the | |
3786 | * requesting message and send it up. | |
3787 | */ | |
1da177e4 LT |
3788 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3789 | } else { | |
c70d7499 CM |
3790 | /* |
3791 | * It's a command to the SMS from some other | |
3792 | * entity. Handle that. | |
3793 | */ | |
1da177e4 LT |
3794 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3795 | } | |
3796 | break; | |
3797 | ||
3798 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3799 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3800 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3801 | /* |
3802 | * It's a response, so find the | |
3803 | * requesting message and send it up. | |
3804 | */ | |
1da177e4 LT |
3805 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3806 | } else { | |
c70d7499 CM |
3807 | /* |
3808 | * It's a command to the SMS from some other | |
3809 | * entity. Handle that. | |
3810 | */ | |
1da177e4 LT |
3811 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3812 | } | |
3813 | break; | |
3814 | ||
3815 | default: | |
4dec302f | 3816 | /* Check for OEM Channels. Clients had better |
3817 | register for these commands. */ | |
3818 | if ((intf->channels[chan].medium | |
3819 | >= IPMI_CHANNEL_MEDIUM_OEM_MIN) | |
3820 | && (intf->channels[chan].medium | |
3821 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { | |
3822 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
3823 | } else { | |
3824 | /* | |
3825 | * We don't handle the channel type, so just | |
3826 | * free the message. | |
3827 | */ | |
3828 | requeue = 0; | |
3829 | } | |
1da177e4 LT |
3830 | } |
3831 | ||
3832 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3833 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 3834 | /* It's an asynchronous event. */ |
1da177e4 LT |
3835 | requeue = handle_read_event_rsp(intf, msg); |
3836 | } else { | |
3837 | /* It's a response from the local BMC. */ | |
3838 | requeue = handle_bmc_rsp(intf, msg); | |
3839 | } | |
3840 | ||
3841 | out: | |
3842 | return requeue; | |
3843 | } | |
3844 | ||
7adf579c CM |
3845 | /* |
3846 | * If there are messages in the queue or pretimeouts, handle them. | |
3847 | */ | |
3848 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
3849 | { | |
3850 | struct ipmi_smi_msg *smi_msg; | |
3851 | unsigned long flags = 0; | |
3852 | int rv; | |
3853 | int run_to_completion = intf->run_to_completion; | |
3854 | ||
3855 | /* See if any waiting messages need to be processed. */ | |
3856 | if (!run_to_completion) | |
3857 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
3858 | while (!list_empty(&intf->waiting_msgs)) { | |
3859 | smi_msg = list_entry(intf->waiting_msgs.next, | |
3860 | struct ipmi_smi_msg, link); | |
3861 | list_del(&smi_msg->link); | |
3862 | if (!run_to_completion) | |
3863 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
3864 | rv = handle_one_recv_msg(intf, smi_msg); | |
3865 | if (!run_to_completion) | |
3866 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
3867 | if (rv == 0) { | |
3868 | /* Message handled */ | |
3869 | ipmi_free_smi_msg(smi_msg); | |
3870 | } else if (rv < 0) { | |
3871 | /* Fatal error on the message, del but don't free. */ | |
3872 | } else { | |
3873 | /* | |
3874 | * To preserve message order, quit if we | |
3875 | * can't handle a message. | |
3876 | */ | |
3877 | list_add(&smi_msg->link, &intf->waiting_msgs); | |
3878 | break; | |
3879 | } | |
3880 | } | |
3881 | if (!run_to_completion) | |
3882 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
3883 | ||
3884 | /* | |
3885 | * If the pretimout count is non-zero, decrement one from it and | |
3886 | * deliver pretimeouts to all the users. | |
3887 | */ | |
3888 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
3889 | ipmi_user_t user; | |
3890 | ||
3891 | rcu_read_lock(); | |
3892 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3893 | if (user->handler->ipmi_watchdog_pretimeout) | |
3894 | user->handler->ipmi_watchdog_pretimeout( | |
3895 | user->handler_data); | |
3896 | } | |
3897 | rcu_read_unlock(); | |
3898 | } | |
3899 | } | |
3900 | ||
3901 | static void smi_recv_tasklet(unsigned long val) | |
3902 | { | |
3903 | handle_new_recv_msgs((ipmi_smi_t) val); | |
3904 | } | |
3905 | ||
1da177e4 LT |
3906 | /* Handle a new message from the lower layer. */ |
3907 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3908 | struct ipmi_smi_msg *msg) | |
3909 | { | |
5956dce1 | 3910 | unsigned long flags = 0; /* keep us warning-free. */ |
5956dce1 | 3911 | int run_to_completion; |
1da177e4 LT |
3912 | |
3913 | ||
1da177e4 LT |
3914 | if ((msg->data_size >= 2) |
3915 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3916 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3917 | && (msg->user_data == NULL)) { |
3918 | /* | |
3919 | * This is the local response to a command send, start | |
3920 | * the timer for these. The user_data will not be | |
3921 | * NULL if this is a response send, and we will let | |
3922 | * response sends just go through. | |
3923 | */ | |
3924 | ||
3925 | /* | |
3926 | * Check for errors, if we get certain errors (ones | |
3927 | * that mean basically we can try again later), we | |
3928 | * ignore them and start the timer. Otherwise we | |
3929 | * report the error immediately. | |
3930 | */ | |
1da177e4 LT |
3931 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
3932 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
3933 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
3934 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 3935 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
3936 | int chan = msg->rsp[3] & 0xf; |
3937 | ||
3938 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
3939 | if (chan >= IPMI_MAX_CHANNELS) |
3940 | ; /* This shouldn't happen */ | |
3941 | else if ((intf->channels[chan].medium | |
3942 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3943 | || (intf->channels[chan].medium | |
3944 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 3945 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 3946 | else |
b2655f26 | 3947 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 3948 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 3949 | } else |
1da177e4 LT |
3950 | /* The message was sent, start the timer. */ |
3951 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 LT |
3952 | |
3953 | ipmi_free_smi_msg(msg); | |
393d2cc3 | 3954 | goto out; |
1da177e4 LT |
3955 | } |
3956 | ||
c70d7499 CM |
3957 | /* |
3958 | * To preserve message order, if the list is not empty, we | |
3959 | * tack this message onto the end of the list. | |
3960 | */ | |
5956dce1 KB |
3961 | run_to_completion = intf->run_to_completion; |
3962 | if (!run_to_completion) | |
3963 | spin_lock_irqsave(&intf->waiting_msgs_lock, flags); | |
7adf579c | 3964 | list_add_tail(&msg->link, &intf->waiting_msgs); |
5956dce1 KB |
3965 | if (!run_to_completion) |
3966 | spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags); | |
c70d7499 | 3967 | |
7adf579c | 3968 | tasklet_schedule(&intf->recv_tasklet); |
393d2cc3 CM |
3969 | out: |
3970 | return; | |
1da177e4 | 3971 | } |
c70d7499 | 3972 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
3973 | |
3974 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3975 | { | |
7adf579c CM |
3976 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
3977 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 3978 | } |
c70d7499 | 3979 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 3980 | |
882fe011 CM |
3981 | static struct ipmi_smi_msg * |
3982 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
3983 | unsigned char seq, long seqid) | |
1da177e4 | 3984 | { |
882fe011 | 3985 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 3986 | if (!smi_msg) |
c70d7499 CM |
3987 | /* |
3988 | * If we can't allocate the message, then just return, we | |
3989 | * get 4 retries, so this should be ok. | |
3990 | */ | |
882fe011 | 3991 | return NULL; |
1da177e4 LT |
3992 | |
3993 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
3994 | smi_msg->data_size = recv_msg->msg.data_len; | |
3995 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 3996 | |
1da177e4 LT |
3997 | #ifdef DEBUG_MSGING |
3998 | { | |
3999 | int m; | |
4000 | printk("Resend: "); | |
e8b33617 | 4001 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4002 | printk(" %2.2x", smi_msg->data[m]); |
4003 | printk("\n"); | |
4004 | } | |
4005 | #endif | |
882fe011 | 4006 | return smi_msg; |
1da177e4 LT |
4007 | } |
4008 | ||
393d2cc3 CM |
4009 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
4010 | struct list_head *timeouts, long timeout_period, | |
89986496 CM |
4011 | int slot, unsigned long *flags, |
4012 | unsigned int *waiting_msgs) | |
393d2cc3 | 4013 | { |
b2c03941 CM |
4014 | struct ipmi_recv_msg *msg; |
4015 | struct ipmi_smi_handlers *handlers; | |
4016 | ||
4017 | if (intf->intf_num == -1) | |
4018 | return; | |
393d2cc3 CM |
4019 | |
4020 | if (!ent->inuse) | |
4021 | return; | |
4022 | ||
4023 | ent->timeout -= timeout_period; | |
89986496 CM |
4024 | if (ent->timeout > 0) { |
4025 | (*waiting_msgs)++; | |
393d2cc3 | 4026 | return; |
89986496 | 4027 | } |
393d2cc3 CM |
4028 | |
4029 | if (ent->retries_left == 0) { | |
4030 | /* The message has used all its retries. */ | |
4031 | ent->inuse = 0; | |
4032 | msg = ent->recv_msg; | |
4033 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4034 | if (ent->broadcast) |
b2655f26 | 4035 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4036 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4037 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4038 | else |
b2655f26 | 4039 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4040 | } else { |
4041 | struct ipmi_smi_msg *smi_msg; | |
4042 | /* More retries, send again. */ | |
4043 | ||
89986496 CM |
4044 | (*waiting_msgs)++; |
4045 | ||
c70d7499 CM |
4046 | /* |
4047 | * Start with the max timer, set to normal timer after | |
4048 | * the message is sent. | |
4049 | */ | |
393d2cc3 CM |
4050 | ent->timeout = MAX_MSG_TIMEOUT; |
4051 | ent->retries_left--; | |
393d2cc3 CM |
4052 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4053 | ent->seqid); | |
25176ed6 CM |
4054 | if (!smi_msg) { |
4055 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4056 | ipmi_inc_stat(intf, | |
4057 | dropped_rexmit_lan_commands); | |
4058 | else | |
4059 | ipmi_inc_stat(intf, | |
4060 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4061 | return; |
25176ed6 | 4062 | } |
393d2cc3 CM |
4063 | |
4064 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4065 | |
c70d7499 CM |
4066 | /* |
4067 | * Send the new message. We send with a zero | |
4068 | * priority. It timed out, I doubt time is that | |
4069 | * critical now, and high priority messages are really | |
4070 | * only for messages to the local MC, which don't get | |
4071 | * resent. | |
4072 | */ | |
b2c03941 | 4073 | handlers = intf->handlers; |
25176ed6 CM |
4074 | if (handlers) { |
4075 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4076 | ipmi_inc_stat(intf, | |
4077 | retransmitted_lan_commands); | |
4078 | else | |
4079 | ipmi_inc_stat(intf, | |
4080 | retransmitted_ipmb_commands); | |
4081 | ||
b2c03941 CM |
4082 | intf->handlers->sender(intf->send_info, |
4083 | smi_msg, 0); | |
25176ed6 | 4084 | } else |
b2c03941 CM |
4085 | ipmi_free_smi_msg(smi_msg); |
4086 | ||
393d2cc3 CM |
4087 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4088 | } | |
4089 | } | |
4090 | ||
89986496 | 4091 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period) |
1da177e4 | 4092 | { |
1da177e4 LT |
4093 | struct list_head timeouts; |
4094 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4095 | unsigned long flags; |
bca0324d | 4096 | int i; |
89986496 | 4097 | unsigned int waiting_msgs = 0; |
1da177e4 | 4098 | |
89986496 CM |
4099 | /* |
4100 | * Go through the seq table and find any messages that | |
4101 | * have timed out, putting them in the timeouts | |
4102 | * list. | |
4103 | */ | |
4104 | INIT_LIST_HEAD(&timeouts); | |
4105 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4106 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4107 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4108 | &timeouts, timeout_period, i, | |
4109 | &flags, &waiting_msgs); | |
4110 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4111 | |
89986496 CM |
4112 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4113 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4114 | |
89986496 CM |
4115 | /* |
4116 | * Maintenance mode handling. Check the timeout | |
4117 | * optimistically before we claim the lock. It may | |
4118 | * mean a timeout gets missed occasionally, but that | |
4119 | * only means the timeout gets extended by one period | |
4120 | * in that case. No big deal, and it avoids the lock | |
4121 | * most of the time. | |
4122 | */ | |
4123 | if (intf->auto_maintenance_timeout > 0) { | |
4124 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4125 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4126 | intf->auto_maintenance_timeout |
4127 | -= timeout_period; | |
4128 | if (!intf->maintenance_mode | |
4129 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4130 | intf->maintenance_mode_enable = false; |
89986496 | 4131 | maintenance_mode_update(intf); |
b9675136 | 4132 | } |
b9675136 | 4133 | } |
89986496 CM |
4134 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4135 | flags); | |
1da177e4 | 4136 | } |
89986496 CM |
4137 | |
4138 | tasklet_schedule(&intf->recv_tasklet); | |
4139 | ||
4140 | return waiting_msgs; | |
1da177e4 LT |
4141 | } |
4142 | ||
89986496 | 4143 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4144 | { |
b2c03941 | 4145 | struct ipmi_smi_handlers *handlers; |
1da177e4 | 4146 | |
89986496 CM |
4147 | /* No event requests when in maintenance mode. */ |
4148 | if (intf->maintenance_mode_enable) | |
4149 | return; | |
b9675136 | 4150 | |
89986496 CM |
4151 | handlers = intf->handlers; |
4152 | if (handlers) | |
4153 | handlers->request_events(intf->send_info); | |
1da177e4 LT |
4154 | } |
4155 | ||
4156 | static struct timer_list ipmi_timer; | |
4157 | ||
8f43f84f | 4158 | static atomic_t stop_operation; |
1da177e4 LT |
4159 | |
4160 | static void ipmi_timeout(unsigned long data) | |
4161 | { | |
89986496 CM |
4162 | ipmi_smi_t intf; |
4163 | int nt = 0; | |
4164 | ||
8f43f84f | 4165 | if (atomic_read(&stop_operation)) |
1da177e4 | 4166 | return; |
1da177e4 | 4167 | |
89986496 CM |
4168 | rcu_read_lock(); |
4169 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4170 | int lnt = 0; | |
4171 | ||
4172 | if (atomic_read(&intf->event_waiters)) { | |
4173 | intf->ticks_to_req_ev--; | |
4174 | if (intf->ticks_to_req_ev == 0) { | |
4175 | ipmi_request_event(intf); | |
4176 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4177 | } | |
4178 | lnt++; | |
4179 | } | |
4180 | ||
4181 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4182 | |
89986496 CM |
4183 | lnt = !!lnt; |
4184 | if (lnt != intf->last_needs_timer && | |
4185 | intf->handlers->set_need_watch) | |
4186 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4187 | intf->last_needs_timer = lnt; | |
1da177e4 | 4188 | |
89986496 CM |
4189 | nt += lnt; |
4190 | } | |
4191 | rcu_read_unlock(); | |
4192 | ||
4193 | if (nt) | |
4194 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4195 | } |
4196 | ||
89986496 CM |
4197 | static void need_waiter(ipmi_smi_t intf) |
4198 | { | |
4199 | /* Racy, but worst case we start the timer twice. */ | |
4200 | if (!timer_pending(&ipmi_timer)) | |
4201 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4202 | } | |
1da177e4 LT |
4203 | |
4204 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4205 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4206 | ||
4207 | /* FIXME - convert these to slabs. */ | |
4208 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
4209 | { | |
4210 | atomic_dec(&smi_msg_inuse_count); | |
4211 | kfree(msg); | |
4212 | } | |
4213 | ||
4214 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4215 | { | |
4216 | struct ipmi_smi_msg *rv; | |
4217 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4218 | if (rv) { | |
4219 | rv->done = free_smi_msg; | |
4220 | rv->user_data = NULL; | |
4221 | atomic_inc(&smi_msg_inuse_count); | |
4222 | } | |
4223 | return rv; | |
4224 | } | |
c70d7499 | 4225 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4226 | |
4227 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4228 | { | |
4229 | atomic_dec(&recv_msg_inuse_count); | |
4230 | kfree(msg); | |
4231 | } | |
4232 | ||
74006309 | 4233 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4234 | { |
4235 | struct ipmi_recv_msg *rv; | |
4236 | ||
4237 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4238 | if (rv) { | |
a9eec556 | 4239 | rv->user = NULL; |
1da177e4 LT |
4240 | rv->done = free_recv_msg; |
4241 | atomic_inc(&recv_msg_inuse_count); | |
4242 | } | |
4243 | return rv; | |
4244 | } | |
4245 | ||
393d2cc3 CM |
4246 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4247 | { | |
4248 | if (msg->user) | |
4249 | kref_put(&msg->user->refcount, free_user); | |
4250 | msg->done(msg); | |
4251 | } | |
c70d7499 | 4252 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4253 | |
1da177e4 LT |
4254 | #ifdef CONFIG_IPMI_PANIC_EVENT |
4255 | ||
895dcfd1 CM |
4256 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4257 | ||
1da177e4 LT |
4258 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4259 | { | |
895dcfd1 | 4260 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4261 | } |
4262 | ||
4263 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4264 | { | |
895dcfd1 CM |
4265 | atomic_dec(&panic_done_count); |
4266 | } | |
4267 | ||
4268 | /* | |
4269 | * Inside a panic, send a message and wait for a response. | |
4270 | */ | |
4271 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4272 | struct ipmi_addr *addr, | |
4273 | struct kernel_ipmi_msg *msg) | |
4274 | { | |
4275 | struct ipmi_smi_msg smi_msg; | |
4276 | struct ipmi_recv_msg recv_msg; | |
4277 | int rv; | |
4278 | ||
4279 | smi_msg.done = dummy_smi_done_handler; | |
4280 | recv_msg.done = dummy_recv_done_handler; | |
4281 | atomic_add(2, &panic_done_count); | |
4282 | rv = i_ipmi_request(NULL, | |
4283 | intf, | |
4284 | addr, | |
4285 | 0, | |
4286 | msg, | |
4287 | intf, | |
4288 | &smi_msg, | |
4289 | &recv_msg, | |
4290 | 0, | |
4291 | intf->channels[0].address, | |
4292 | intf->channels[0].lun, | |
4293 | 0, 1); /* Don't retry, and don't wait. */ | |
4294 | if (rv) | |
4295 | atomic_sub(2, &panic_done_count); | |
4296 | while (atomic_read(&panic_done_count) != 0) | |
4297 | ipmi_poll(intf); | |
1da177e4 LT |
4298 | } |
4299 | ||
4300 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 4301 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4302 | { |
56a55ec6 CM |
4303 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4304 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4305 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4306 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4307 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4308 | intf->event_receiver = msg->msg.data[1]; |
4309 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4310 | } |
4311 | } | |
4312 | ||
56a55ec6 | 4313 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4314 | { |
56a55ec6 CM |
4315 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4316 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4317 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4318 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4319 | /* | |
4320 | * A get device id command, save if we are an event | |
4321 | * receiver or generator. | |
4322 | */ | |
56a55ec6 CM |
4323 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4324 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4325 | } |
4326 | } | |
4327 | #endif | |
4328 | ||
4329 | static void send_panic_events(char *str) | |
4330 | { | |
4331 | struct kernel_ipmi_msg msg; | |
4332 | ipmi_smi_t intf; | |
4333 | unsigned char data[16]; | |
1da177e4 LT |
4334 | struct ipmi_system_interface_addr *si; |
4335 | struct ipmi_addr addr; | |
1da177e4 LT |
4336 | |
4337 | si = (struct ipmi_system_interface_addr *) &addr; | |
4338 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4339 | si->channel = IPMI_BMC_CHANNEL; | |
4340 | si->lun = 0; | |
4341 | ||
4342 | /* Fill in an event telling that we have failed. */ | |
4343 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4344 | msg.cmd = 2; /* Platform event command. */ | |
4345 | msg.data = data; | |
4346 | msg.data_len = 8; | |
cda315ab | 4347 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4348 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4349 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4350 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4351 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4352 | ||
c70d7499 CM |
4353 | /* |
4354 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4355 | * to make the panic events more useful. | |
4356 | */ | |
1da177e4 LT |
4357 | if (str) { |
4358 | data[3] = str[0]; | |
4359 | data[6] = str[1]; | |
4360 | data[7] = str[2]; | |
4361 | } | |
4362 | ||
1da177e4 | 4363 | /* For every registered interface, send the event. */ |
bca0324d | 4364 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4365 | if (!intf->handlers) |
4366 | /* Interface is not ready. */ | |
1da177e4 LT |
4367 | continue; |
4368 | ||
5956dce1 | 4369 | intf->run_to_completion = 1; |
1da177e4 LT |
4370 | /* Send the event announcing the panic. */ |
4371 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
895dcfd1 | 4372 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4373 | } |
4374 | ||
4375 | #ifdef CONFIG_IPMI_PANIC_STRING | |
c70d7499 CM |
4376 | /* |
4377 | * On every interface, dump a bunch of OEM event holding the | |
4378 | * string. | |
4379 | */ | |
4380 | if (!str) | |
1da177e4 LT |
4381 | return; |
4382 | ||
bca0324d CM |
4383 | /* For every registered interface, send the event. */ |
4384 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4385 | char *p = str; |
4386 | struct ipmi_ipmb_addr *ipmb; | |
4387 | int j; | |
4388 | ||
bca0324d CM |
4389 | if (intf->intf_num == -1) |
4390 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4391 | continue; |
4392 | ||
78ba2faf CM |
4393 | /* |
4394 | * intf_num is used as an marker to tell if the | |
4395 | * interface is valid. Thus we need a read barrier to | |
4396 | * make sure data fetched before checking intf_num | |
4397 | * won't be used. | |
4398 | */ | |
4399 | smp_rmb(); | |
4400 | ||
c70d7499 CM |
4401 | /* |
4402 | * First job here is to figure out where to send the | |
4403 | * OEM events. There's no way in IPMI to send OEM | |
4404 | * events using an event send command, so we have to | |
4405 | * find the SEL to put them in and stick them in | |
4406 | * there. | |
4407 | */ | |
1da177e4 LT |
4408 | |
4409 | /* Get capabilities from the get device id. */ | |
4410 | intf->local_sel_device = 0; | |
4411 | intf->local_event_generator = 0; | |
4412 | intf->event_receiver = 0; | |
4413 | ||
4414 | /* Request the device info from the local MC. */ | |
4415 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4416 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4417 | msg.data = NULL; | |
4418 | msg.data_len = 0; | |
4419 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 4420 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4421 | |
4422 | if (intf->local_event_generator) { | |
4423 | /* Request the event receiver from the local MC. */ | |
4424 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4425 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4426 | msg.data = NULL; | |
4427 | msg.data_len = 0; | |
4428 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 4429 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4430 | } |
4431 | intf->null_user_handler = NULL; | |
4432 | ||
c70d7499 CM |
4433 | /* |
4434 | * Validate the event receiver. The low bit must not | |
4435 | * be 1 (it must be a valid IPMB address), it cannot | |
4436 | * be zero, and it must not be my address. | |
4437 | */ | |
4438 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4439 | && (intf->event_receiver != 0) |
c70d7499 CM |
4440 | && (intf->event_receiver != intf->channels[0].address)) { |
4441 | /* | |
4442 | * The event receiver is valid, send an IPMB | |
4443 | * message. | |
4444 | */ | |
1da177e4 LT |
4445 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4446 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4447 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4448 | ipmb->lun = intf->event_receiver_lun; | |
4449 | ipmb->slave_addr = intf->event_receiver; | |
4450 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4451 | /* |
4452 | * The event receiver was not valid (or was | |
4453 | * me), but I am an SEL device, just dump it | |
4454 | * in my SEL. | |
4455 | */ | |
1da177e4 LT |
4456 | si = (struct ipmi_system_interface_addr *) &addr; |
4457 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4458 | si->channel = IPMI_BMC_CHANNEL; | |
4459 | si->lun = 0; | |
4460 | } else | |
4461 | continue; /* No where to send the event. */ | |
4462 | ||
1da177e4 LT |
4463 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4464 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4465 | msg.data = data; | |
4466 | msg.data_len = 16; | |
4467 | ||
4468 | j = 0; | |
4469 | while (*p) { | |
4470 | int size = strlen(p); | |
4471 | ||
4472 | if (size > 11) | |
4473 | size = 11; | |
4474 | data[0] = 0; | |
4475 | data[1] = 0; | |
4476 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4477 | data[3] = intf->channels[0].address; |
1da177e4 | 4478 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4479 | /* |
4480 | * Always give 11 bytes, so strncpy will fill | |
4481 | * it with zeroes for me. | |
4482 | */ | |
1da177e4 LT |
4483 | strncpy(data+5, p, 11); |
4484 | p += size; | |
4485 | ||
895dcfd1 | 4486 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 4487 | } |
c70d7499 | 4488 | } |
1da177e4 LT |
4489 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
4490 | } | |
4491 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
4492 | ||
0c8204b3 | 4493 | static int has_panicked; |
1da177e4 LT |
4494 | |
4495 | static int panic_event(struct notifier_block *this, | |
4496 | unsigned long event, | |
c70d7499 | 4497 | void *ptr) |
1da177e4 | 4498 | { |
1da177e4 LT |
4499 | ipmi_smi_t intf; |
4500 | ||
f18190bd | 4501 | if (has_panicked) |
1da177e4 | 4502 | return NOTIFY_DONE; |
f18190bd | 4503 | has_panicked = 1; |
1da177e4 LT |
4504 | |
4505 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4506 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4507 | if (!intf->handlers) |
4508 | /* Interface is not ready. */ | |
1da177e4 LT |
4509 | continue; |
4510 | ||
5956dce1 | 4511 | intf->run_to_completion = 1; |
1da177e4 LT |
4512 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
4513 | } | |
4514 | ||
4515 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
4516 | send_panic_events(ptr); | |
4517 | #endif | |
4518 | ||
4519 | return NOTIFY_DONE; | |
4520 | } | |
4521 | ||
4522 | static struct notifier_block panic_block = { | |
4523 | .notifier_call = panic_event, | |
4524 | .next = NULL, | |
4525 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4526 | }; | |
4527 | ||
4528 | static int ipmi_init_msghandler(void) | |
4529 | { | |
50c812b2 | 4530 | int rv; |
1da177e4 LT |
4531 | |
4532 | if (initialized) | |
4533 | return 0; | |
4534 | ||
fe2d5ffc | 4535 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4536 | if (rv) { |
4537 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4538 | return rv; | |
4539 | } | |
4540 | ||
1da177e4 | 4541 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4542 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4543 | |
3b625943 | 4544 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4545 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4546 | if (!proc_ipmi_root) { | |
4547 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
4548 | return -ENOMEM; | |
4549 | } | |
4550 | ||
3b625943 | 4551 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4552 | |
409035e0 CM |
4553 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4554 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4555 | |
e041c683 | 4556 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4557 | |
4558 | initialized = 1; | |
4559 | ||
4560 | return 0; | |
4561 | } | |
4562 | ||
60ee6d5f | 4563 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
4564 | { |
4565 | ipmi_init_msghandler(); | |
4566 | return 0; | |
4567 | } | |
4568 | ||
60ee6d5f | 4569 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
4570 | { |
4571 | int count; | |
4572 | ||
4573 | if (!initialized) | |
4574 | return; | |
4575 | ||
e041c683 | 4576 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4577 | |
c70d7499 CM |
4578 | /* |
4579 | * This can't be called if any interfaces exist, so no worry | |
4580 | * about shutting down the interfaces. | |
4581 | */ | |
1da177e4 | 4582 | |
c70d7499 CM |
4583 | /* |
4584 | * Tell the timer to stop, then wait for it to stop. This | |
4585 | * avoids problems with race conditions removing the timer | |
4586 | * here. | |
4587 | */ | |
8f43f84f CM |
4588 | atomic_inc(&stop_operation); |
4589 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4590 | |
3b625943 | 4591 | #ifdef CONFIG_PROC_FS |
a8ca16ea | 4592 | proc_remove(proc_ipmi_root); |
3b625943 | 4593 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4594 | |
fe2d5ffc | 4595 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4596 | |
1da177e4 LT |
4597 | initialized = 0; |
4598 | ||
4599 | /* Check for buffer leaks. */ | |
4600 | count = atomic_read(&smi_msg_inuse_count); | |
4601 | if (count != 0) | |
4602 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4603 | count); | |
4604 | count = atomic_read(&recv_msg_inuse_count); | |
4605 | if (count != 0) | |
4606 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4607 | count); | |
4608 | } | |
4609 | module_exit(cleanup_ipmi); | |
4610 | ||
4611 | module_init(ipmi_init_msghandler_mod); | |
4612 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4613 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4614 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4615 | " interface."); | |
1fdd75bd | 4616 | MODULE_VERSION(IPMI_DRIVER_VERSION); |