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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); |
7ea0ed2b CM |
59 | static int handle_one_recv_msg(ipmi_smi_t intf, |
60 | struct ipmi_smi_msg *msg); | |
1da177e4 | 61 | |
0c8204b3 | 62 | static int initialized; |
1da177e4 | 63 | |
3b625943 | 64 | #ifdef CONFIG_PROC_FS |
0c8204b3 | 65 | static struct proc_dir_entry *proc_ipmi_root; |
3b625943 | 66 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 67 | |
b9675136 CM |
68 | /* Remain in auto-maintenance mode for this amount of time (in ms). */ |
69 | #define IPMI_MAINTENANCE_MODE_TIMEOUT 30000 | |
70 | ||
1da177e4 LT |
71 | #define MAX_EVENTS_IN_QUEUE 25 |
72 | ||
c70d7499 CM |
73 | /* |
74 | * Don't let a message sit in a queue forever, always time it with at lest | |
75 | * the max message timer. This is in milliseconds. | |
76 | */ | |
1da177e4 LT |
77 | #define MAX_MSG_TIMEOUT 60000 |
78 | ||
89986496 CM |
79 | /* Call every ~1000 ms. */ |
80 | #define IPMI_TIMEOUT_TIME 1000 | |
81 | ||
82 | /* How many jiffies does it take to get to the timeout time. */ | |
83 | #define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) | |
84 | ||
85 | /* | |
86 | * Request events from the queue every second (this is the number of | |
87 | * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the | |
88 | * future, IPMI will add a way to know immediately if an event is in | |
89 | * the queue and this silliness can go away. | |
90 | */ | |
91 | #define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) | |
92 | ||
393d2cc3 CM |
93 | /* |
94 | * The main "user" data structure. | |
95 | */ | |
c70d7499 | 96 | struct ipmi_user { |
1da177e4 LT |
97 | struct list_head link; |
98 | ||
7aefac26 CM |
99 | /* Set to false when the user is destroyed. */ |
100 | bool valid; | |
393d2cc3 CM |
101 | |
102 | struct kref refcount; | |
103 | ||
1da177e4 LT |
104 | /* The upper layer that handles receive messages. */ |
105 | struct ipmi_user_hndl *handler; | |
106 | void *handler_data; | |
107 | ||
108 | /* The interface this user is bound to. */ | |
109 | ipmi_smi_t intf; | |
110 | ||
111 | /* Does this interface receive IPMI events? */ | |
89986496 | 112 | bool gets_events; |
1da177e4 LT |
113 | }; |
114 | ||
c70d7499 | 115 | struct cmd_rcvr { |
1da177e4 LT |
116 | struct list_head link; |
117 | ||
118 | ipmi_user_t user; | |
119 | unsigned char netfn; | |
120 | unsigned char cmd; | |
c69c3127 | 121 | unsigned int chans; |
393d2cc3 CM |
122 | |
123 | /* | |
124 | * This is used to form a linked lised during mass deletion. | |
125 | * Since this is in an RCU list, we cannot use the link above | |
126 | * or change any data until the RCU period completes. So we | |
127 | * use this next variable during mass deletion so we can have | |
128 | * a list and don't have to wait and restart the search on | |
c70d7499 CM |
129 | * every individual deletion of a command. |
130 | */ | |
393d2cc3 | 131 | struct cmd_rcvr *next; |
1da177e4 LT |
132 | }; |
133 | ||
c70d7499 | 134 | struct seq_table { |
1da177e4 LT |
135 | unsigned int inuse : 1; |
136 | unsigned int broadcast : 1; | |
137 | ||
138 | unsigned long timeout; | |
139 | unsigned long orig_timeout; | |
140 | unsigned int retries_left; | |
141 | ||
c70d7499 CM |
142 | /* |
143 | * To verify on an incoming send message response that this is | |
144 | * the message that the response is for, we keep a sequence id | |
145 | * and increment it every time we send a message. | |
146 | */ | |
1da177e4 LT |
147 | long seqid; |
148 | ||
c70d7499 CM |
149 | /* |
150 | * This is held so we can properly respond to the message on a | |
151 | * timeout, and it is used to hold the temporary data for | |
152 | * retransmission, too. | |
153 | */ | |
1da177e4 LT |
154 | struct ipmi_recv_msg *recv_msg; |
155 | }; | |
156 | ||
c70d7499 CM |
157 | /* |
158 | * Store the information in a msgid (long) to allow us to find a | |
159 | * sequence table entry from the msgid. | |
160 | */ | |
1da177e4 LT |
161 | #define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff)) |
162 | ||
163 | #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \ | |
164 | do { \ | |
165 | seq = ((msgid >> 26) & 0x3f); \ | |
166 | seqid = (msgid & 0x3fffff); \ | |
c70d7499 | 167 | } while (0) |
1da177e4 LT |
168 | |
169 | #define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff) | |
170 | ||
c70d7499 | 171 | struct ipmi_channel { |
1da177e4 LT |
172 | unsigned char medium; |
173 | unsigned char protocol; | |
c14979b9 | 174 | |
c70d7499 CM |
175 | /* |
176 | * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR, | |
177 | * but may be changed by the user. | |
178 | */ | |
c14979b9 CM |
179 | unsigned char address; |
180 | ||
c70d7499 CM |
181 | /* |
182 | * My LUN. This should generally stay the SMS LUN, but just in | |
183 | * case... | |
184 | */ | |
c14979b9 | 185 | unsigned char lun; |
1da177e4 LT |
186 | }; |
187 | ||
3b625943 | 188 | #ifdef CONFIG_PROC_FS |
c70d7499 | 189 | struct ipmi_proc_entry { |
1da177e4 LT |
190 | char *name; |
191 | struct ipmi_proc_entry *next; | |
192 | }; | |
3b625943 | 193 | #endif |
1da177e4 | 194 | |
c70d7499 | 195 | struct bmc_device { |
16639eb0 | 196 | struct platform_device pdev; |
50c812b2 CM |
197 | struct ipmi_device_id id; |
198 | unsigned char guid[16]; | |
199 | int guid_set; | |
16639eb0 CM |
200 | char name[16]; |
201 | struct kref usecount; | |
50c812b2 | 202 | }; |
16639eb0 | 203 | #define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev) |
50c812b2 | 204 | |
b2655f26 KB |
205 | /* |
206 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
207 | * structure. | |
208 | */ | |
73f2bdb9 CM |
209 | enum ipmi_stat_indexes { |
210 | /* Commands we got from the user that were invalid. */ | |
211 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 212 | |
73f2bdb9 CM |
213 | /* Commands we sent to the MC. */ |
214 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 215 | |
73f2bdb9 CM |
216 | /* Responses from the MC that were delivered to a user. */ |
217 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 218 | |
73f2bdb9 CM |
219 | /* Responses from the MC that were not delivered to a user. */ |
220 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 221 | |
73f2bdb9 CM |
222 | /* Commands we sent out to the IPMB bus. */ |
223 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 224 | |
73f2bdb9 CM |
225 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
226 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 227 | |
73f2bdb9 CM |
228 | /* Each retransmit increments this count. */ |
229 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 230 | |
73f2bdb9 CM |
231 | /* |
232 | * When a message times out (runs out of retransmits) this is | |
233 | * incremented. | |
234 | */ | |
235 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 236 | |
73f2bdb9 CM |
237 | /* |
238 | * This is like above, but for broadcasts. Broadcasts are | |
239 | * *not* included in the above count (they are expected to | |
240 | * time out). | |
241 | */ | |
242 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 243 | |
73f2bdb9 CM |
244 | /* Responses I have sent to the IPMB bus. */ |
245 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 246 | |
73f2bdb9 CM |
247 | /* The response was delivered to the user. */ |
248 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 249 | |
73f2bdb9 CM |
250 | /* The response had invalid data in it. */ |
251 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 252 | |
73f2bdb9 CM |
253 | /* The response didn't have anyone waiting for it. */ |
254 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 255 | |
73f2bdb9 CM |
256 | /* Commands we sent out to the IPMB bus. */ |
257 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 258 | |
73f2bdb9 CM |
259 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
260 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 261 | |
73f2bdb9 CM |
262 | /* Each retransmit increments this count. */ |
263 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 264 | |
73f2bdb9 CM |
265 | /* |
266 | * When a message times out (runs out of retransmits) this is | |
267 | * incremented. | |
268 | */ | |
269 | IPMI_STAT_timed_out_lan_commands, | |
270 | ||
271 | /* Responses I have sent to the IPMB bus. */ | |
272 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 273 | |
73f2bdb9 CM |
274 | /* The response was delivered to the user. */ |
275 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 276 | |
73f2bdb9 CM |
277 | /* The response had invalid data in it. */ |
278 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 279 | |
73f2bdb9 CM |
280 | /* The response didn't have anyone waiting for it. */ |
281 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 282 | |
73f2bdb9 CM |
283 | /* The command was delivered to the user. */ |
284 | IPMI_STAT_handled_commands, | |
b2655f26 | 285 | |
73f2bdb9 CM |
286 | /* The command had invalid data in it. */ |
287 | IPMI_STAT_invalid_commands, | |
b2655f26 | 288 | |
73f2bdb9 CM |
289 | /* The command didn't have anyone waiting for it. */ |
290 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 291 | |
73f2bdb9 CM |
292 | /* Invalid data in an event. */ |
293 | IPMI_STAT_invalid_events, | |
b2655f26 | 294 | |
73f2bdb9 CM |
295 | /* Events that were received with the proper format. */ |
296 | IPMI_STAT_events, | |
b2655f26 | 297 | |
25176ed6 CM |
298 | /* Retransmissions on IPMB that failed. */ |
299 | IPMI_STAT_dropped_rexmit_ipmb_commands, | |
300 | ||
301 | /* Retransmissions on LAN that failed. */ | |
302 | IPMI_STAT_dropped_rexmit_lan_commands, | |
b2655f26 | 303 | |
73f2bdb9 CM |
304 | /* This *must* remain last, add new values above this. */ |
305 | IPMI_NUM_STATS | |
306 | }; | |
b2655f26 KB |
307 | |
308 | ||
1da177e4 | 309 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 310 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 311 | struct ipmi_smi { |
1da177e4 LT |
312 | /* What interface number are we? */ |
313 | int intf_num; | |
314 | ||
393d2cc3 CM |
315 | struct kref refcount; |
316 | ||
7ea0ed2b CM |
317 | /* Set when the interface is being unregistered. */ |
318 | bool in_shutdown; | |
319 | ||
bca0324d CM |
320 | /* Used for a list of interfaces. */ |
321 | struct list_head link; | |
322 | ||
c70d7499 CM |
323 | /* |
324 | * The list of upper layers that are using me. seq_lock | |
325 | * protects this. | |
326 | */ | |
393d2cc3 | 327 | struct list_head users; |
1da177e4 | 328 | |
b2c03941 CM |
329 | /* Information to supply to users. */ |
330 | unsigned char ipmi_version_major; | |
331 | unsigned char ipmi_version_minor; | |
332 | ||
1da177e4 LT |
333 | /* Used for wake ups at startup. */ |
334 | wait_queue_head_t waitq; | |
335 | ||
50c812b2 CM |
336 | struct bmc_device *bmc; |
337 | char *my_dev_name; | |
1da177e4 | 338 | |
c70d7499 CM |
339 | /* |
340 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
341 | * must either be holding the ipmi_interfaces_mutex or be in |
342 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
343 | * value into a local variable and make sure it is not NULL. |
344 | */ | |
81d02b7f | 345 | const struct ipmi_smi_handlers *handlers; |
1da177e4 LT |
346 | void *send_info; |
347 | ||
3b625943 | 348 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
349 | /* A list of proc entries for this interface. */ |
350 | struct mutex proc_entry_lock; | |
1da177e4 | 351 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 352 | #endif |
1da177e4 | 353 | |
50c812b2 CM |
354 | /* Driver-model device for the system interface. */ |
355 | struct device *si_dev; | |
356 | ||
c70d7499 CM |
357 | /* |
358 | * A table of sequence numbers for this interface. We use the | |
359 | * sequence numbers for IPMB messages that go out of the | |
360 | * interface to match them up with their responses. A routine | |
361 | * is called periodically to time the items in this list. | |
362 | */ | |
1da177e4 LT |
363 | spinlock_t seq_lock; |
364 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
365 | int curr_seq; | |
366 | ||
c70d7499 | 367 | /* |
7adf579c CM |
368 | * Messages queued for delivery. If delivery fails (out of memory |
369 | * for instance), They will stay in here to be processed later in a | |
370 | * periodic timer interrupt. The tasklet is for handling received | |
371 | * messages directly from the handler. | |
c70d7499 | 372 | */ |
65be7544 CM |
373 | spinlock_t waiting_rcv_msgs_lock; |
374 | struct list_head waiting_rcv_msgs; | |
7adf579c CM |
375 | atomic_t watchdog_pretimeouts_to_deliver; |
376 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 377 | |
7ea0ed2b CM |
378 | spinlock_t xmit_msgs_lock; |
379 | struct list_head xmit_msgs; | |
380 | struct ipmi_smi_msg *curr_msg; | |
381 | struct list_head hp_xmit_msgs; | |
382 | ||
c70d7499 CM |
383 | /* |
384 | * The list of command receivers that are registered for commands | |
385 | * on this interface. | |
386 | */ | |
d6dfd131 | 387 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
388 | struct list_head cmd_rcvrs; |
389 | ||
c70d7499 CM |
390 | /* |
391 | * Events that were queues because no one was there to receive | |
392 | * them. | |
393 | */ | |
1da177e4 LT |
394 | spinlock_t events_lock; /* For dealing with event stuff. */ |
395 | struct list_head waiting_events; | |
396 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
397 | char delivering_events; |
398 | char event_msg_printed; | |
89986496 CM |
399 | atomic_t event_waiters; |
400 | unsigned int ticks_to_req_ev; | |
401 | int last_needs_timer; | |
1da177e4 | 402 | |
c70d7499 CM |
403 | /* |
404 | * The event receiver for my BMC, only really used at panic | |
405 | * shutdown as a place to store this. | |
406 | */ | |
1da177e4 LT |
407 | unsigned char event_receiver; |
408 | unsigned char event_receiver_lun; | |
409 | unsigned char local_sel_device; | |
410 | unsigned char local_event_generator; | |
411 | ||
b9675136 CM |
412 | /* For handling of maintenance mode. */ |
413 | int maintenance_mode; | |
7aefac26 | 414 | bool maintenance_mode_enable; |
b9675136 CM |
415 | int auto_maintenance_timeout; |
416 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
417 | ||
c70d7499 CM |
418 | /* |
419 | * A cheap hack, if this is non-null and a message to an | |
420 | * interface comes in with a NULL user, call this routine with | |
421 | * it. Note that the message will still be freed by the | |
422 | * caller. This only works on the system interface. | |
423 | */ | |
56a55ec6 | 424 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 425 | |
c70d7499 CM |
426 | /* |
427 | * When we are scanning the channels for an SMI, this will | |
428 | * tell which channel we are scanning. | |
429 | */ | |
1da177e4 LT |
430 | int curr_channel; |
431 | ||
432 | /* Channel information */ | |
433 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
434 | ||
435 | /* Proc FS stuff. */ | |
436 | struct proc_dir_entry *proc_dir; | |
437 | char proc_dir_name[10]; | |
438 | ||
b2655f26 | 439 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
440 | |
441 | /* | |
442 | * run_to_completion duplicate of smb_info, smi_info | |
443 | * and ipmi_serial_info structures. Used to decrease numbers of | |
444 | * parameters passed by "low" level IPMI code. | |
445 | */ | |
446 | int run_to_completion; | |
1da177e4 | 447 | }; |
50c812b2 | 448 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 449 | |
50c812b2 CM |
450 | /** |
451 | * The driver model view of the IPMI messaging driver. | |
452 | */ | |
fe2d5ffc DW |
453 | static struct platform_driver ipmidriver = { |
454 | .driver = { | |
455 | .name = "ipmi", | |
456 | .bus = &platform_bus_type | |
457 | } | |
50c812b2 CM |
458 | }; |
459 | static DEFINE_MUTEX(ipmidriver_mutex); | |
460 | ||
bed9759b | 461 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 462 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 463 | |
c70d7499 CM |
464 | /* |
465 | * List of watchers that want to know when smi's are added and deleted. | |
466 | */ | |
bed9759b | 467 | static LIST_HEAD(smi_watchers); |
b2c03941 | 468 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 469 | |
b2655f26 KB |
470 | #define ipmi_inc_stat(intf, stat) \ |
471 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
472 | #define ipmi_get_stat(intf, stat) \ | |
473 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
474 | ||
99ee6735 LC |
475 | static const char * const addr_src_to_str[] = { |
476 | "invalid", "hotmod", "hardcoded", "SPMI", "ACPI", "SMBIOS", "PCI", | |
b07b58a3 | 477 | "device-tree" |
99ee6735 | 478 | }; |
7e50387b CM |
479 | |
480 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src) | |
481 | { | |
b07b58a3 | 482 | if (src >= SI_LAST) |
7e50387b CM |
483 | src = 0; /* Invalid */ |
484 | return addr_src_to_str[src]; | |
485 | } | |
486 | EXPORT_SYMBOL(ipmi_addr_src_to_str); | |
487 | ||
25176ed6 CM |
488 | static int is_lan_addr(struct ipmi_addr *addr) |
489 | { | |
490 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
491 | } | |
492 | ||
493 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
494 | { | |
495 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
496 | } | |
497 | ||
498 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
499 | { | |
500 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
501 | } | |
b2655f26 | 502 | |
393d2cc3 CM |
503 | static void free_recv_msg_list(struct list_head *q) |
504 | { | |
505 | struct ipmi_recv_msg *msg, *msg2; | |
506 | ||
507 | list_for_each_entry_safe(msg, msg2, q, link) { | |
508 | list_del(&msg->link); | |
509 | ipmi_free_recv_msg(msg); | |
510 | } | |
511 | } | |
512 | ||
f3ce6a0e CM |
513 | static void free_smi_msg_list(struct list_head *q) |
514 | { | |
515 | struct ipmi_smi_msg *msg, *msg2; | |
516 | ||
517 | list_for_each_entry_safe(msg, msg2, q, link) { | |
518 | list_del(&msg->link); | |
519 | ipmi_free_smi_msg(msg); | |
520 | } | |
521 | } | |
522 | ||
393d2cc3 CM |
523 | static void clean_up_interface_data(ipmi_smi_t intf) |
524 | { | |
525 | int i; | |
526 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
527 | struct list_head list; |
528 | ||
7adf579c CM |
529 | tasklet_kill(&intf->recv_tasklet); |
530 | ||
65be7544 | 531 | free_smi_msg_list(&intf->waiting_rcv_msgs); |
393d2cc3 CM |
532 | free_recv_msg_list(&intf->waiting_events); |
533 | ||
78ba2faf CM |
534 | /* |
535 | * Wholesale remove all the entries from the list in the | |
536 | * interface and wait for RCU to know that none are in use. | |
537 | */ | |
d6dfd131 | 538 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
539 | INIT_LIST_HEAD(&list); |
540 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 541 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
542 | |
543 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
544 | kfree(rcvr); | |
545 | ||
546 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
547 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 548 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 549 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
550 | } |
551 | } | |
552 | ||
553 | static void intf_free(struct kref *ref) | |
554 | { | |
555 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
556 | ||
557 | clean_up_interface_data(intf); | |
558 | kfree(intf); | |
559 | } | |
560 | ||
bca0324d | 561 | struct watcher_entry { |
b2c03941 CM |
562 | int intf_num; |
563 | ipmi_smi_t intf; | |
bca0324d | 564 | struct list_head link; |
bca0324d CM |
565 | }; |
566 | ||
1da177e4 LT |
567 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
568 | { | |
bca0324d | 569 | ipmi_smi_t intf; |
e381d1c4 | 570 | LIST_HEAD(to_deliver); |
bca0324d CM |
571 | struct watcher_entry *e, *e2; |
572 | ||
b2c03941 CM |
573 | mutex_lock(&smi_watchers_mutex); |
574 | ||
bca0324d CM |
575 | mutex_lock(&ipmi_interfaces_mutex); |
576 | ||
b2c03941 | 577 | /* Build a list of things to deliver. */ |
78ba2faf | 578 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
579 | if (intf->intf_num == -1) |
580 | continue; | |
581 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
582 | if (!e) | |
583 | goto out_err; | |
b2c03941 CM |
584 | kref_get(&intf->refcount); |
585 | e->intf = intf; | |
bca0324d CM |
586 | e->intf_num = intf->intf_num; |
587 | list_add_tail(&e->link, &to_deliver); | |
588 | } | |
1da177e4 | 589 | |
b2c03941 CM |
590 | /* We will succeed, so add it to the list. */ |
591 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
592 | |
593 | mutex_unlock(&ipmi_interfaces_mutex); | |
594 | ||
595 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
596 | list_del(&e->link); | |
b2c03941 CM |
597 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
598 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 599 | kfree(e); |
1da177e4 | 600 | } |
bca0324d | 601 | |
b2c03941 | 602 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 603 | |
1da177e4 | 604 | return 0; |
bca0324d CM |
605 | |
606 | out_err: | |
b2c03941 CM |
607 | mutex_unlock(&ipmi_interfaces_mutex); |
608 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
609 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
610 | list_del(&e->link); | |
b2c03941 | 611 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
612 | kfree(e); |
613 | } | |
614 | return -ENOMEM; | |
1da177e4 | 615 | } |
c70d7499 | 616 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
617 | |
618 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
619 | { | |
b2c03941 | 620 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 621 | list_del(&(watcher->link)); |
b2c03941 | 622 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
623 | return 0; |
624 | } | |
c70d7499 | 625 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 626 | |
b2c03941 CM |
627 | /* |
628 | * Must be called with smi_watchers_mutex held. | |
629 | */ | |
1da177e4 | 630 | static void |
50c812b2 | 631 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
632 | { |
633 | struct ipmi_smi_watcher *w; | |
634 | ||
1da177e4 LT |
635 | list_for_each_entry(w, &smi_watchers, link) { |
636 | if (try_module_get(w->owner)) { | |
50c812b2 | 637 | w->new_smi(i, dev); |
1da177e4 LT |
638 | module_put(w->owner); |
639 | } | |
640 | } | |
1da177e4 LT |
641 | } |
642 | ||
643 | static int | |
644 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
645 | { | |
646 | if (addr1->addr_type != addr2->addr_type) | |
647 | return 0; | |
648 | ||
649 | if (addr1->channel != addr2->channel) | |
650 | return 0; | |
651 | ||
652 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
653 | struct ipmi_system_interface_addr *smi_addr1 | |
654 | = (struct ipmi_system_interface_addr *) addr1; | |
655 | struct ipmi_system_interface_addr *smi_addr2 | |
656 | = (struct ipmi_system_interface_addr *) addr2; | |
657 | return (smi_addr1->lun == smi_addr2->lun); | |
658 | } | |
659 | ||
25176ed6 | 660 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
661 | struct ipmi_ipmb_addr *ipmb_addr1 |
662 | = (struct ipmi_ipmb_addr *) addr1; | |
663 | struct ipmi_ipmb_addr *ipmb_addr2 | |
664 | = (struct ipmi_ipmb_addr *) addr2; | |
665 | ||
666 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
667 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
668 | } | |
669 | ||
25176ed6 | 670 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
671 | struct ipmi_lan_addr *lan_addr1 |
672 | = (struct ipmi_lan_addr *) addr1; | |
673 | struct ipmi_lan_addr *lan_addr2 | |
674 | = (struct ipmi_lan_addr *) addr2; | |
675 | ||
676 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
677 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
678 | && (lan_addr1->session_handle | |
679 | == lan_addr2->session_handle) | |
680 | && (lan_addr1->lun == lan_addr2->lun)); | |
681 | } | |
682 | ||
683 | return 1; | |
684 | } | |
685 | ||
686 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
687 | { | |
c70d7499 | 688 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 689 | return -EINVAL; |
1da177e4 LT |
690 | |
691 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
692 | if (addr->channel != IPMI_BMC_CHANNEL) | |
693 | return -EINVAL; | |
694 | return 0; | |
695 | } | |
696 | ||
697 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 698 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
699 | || (addr->channel < 0)) |
700 | return -EINVAL; | |
701 | ||
25176ed6 | 702 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 703 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 704 | return -EINVAL; |
1da177e4 LT |
705 | return 0; |
706 | } | |
707 | ||
25176ed6 | 708 | if (is_lan_addr(addr)) { |
c70d7499 | 709 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 710 | return -EINVAL; |
1da177e4 LT |
711 | return 0; |
712 | } | |
713 | ||
714 | return -EINVAL; | |
715 | } | |
c70d7499 | 716 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
717 | |
718 | unsigned int ipmi_addr_length(int addr_type) | |
719 | { | |
720 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
721 | return sizeof(struct ipmi_system_interface_addr); | |
722 | ||
723 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 724 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 725 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
726 | |
727 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
728 | return sizeof(struct ipmi_lan_addr); | |
729 | ||
730 | return 0; | |
731 | } | |
c70d7499 | 732 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
733 | |
734 | static void deliver_response(struct ipmi_recv_msg *msg) | |
735 | { | |
8a3628d5 | 736 | if (!msg->user) { |
56a55ec6 | 737 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
738 | |
739 | /* Special handling for NULL users. */ | |
740 | if (intf->null_user_handler) { | |
741 | intf->null_user_handler(intf, msg); | |
b2655f26 | 742 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
743 | } else { |
744 | /* No handler, so give up. */ | |
b2655f26 | 745 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
746 | } |
747 | ipmi_free_recv_msg(msg); | |
c49c0976 HK |
748 | } else if (!oops_in_progress) { |
749 | /* | |
750 | * If we are running in the panic context, calling the | |
751 | * receive handler doesn't much meaning and has a deadlock | |
752 | * risk. At this moment, simply skip it in that case. | |
753 | */ | |
754 | ||
393d2cc3 CM |
755 | ipmi_user_t user = msg->user; |
756 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 757 | } |
1da177e4 LT |
758 | } |
759 | ||
b2c03941 CM |
760 | static void |
761 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
762 | { | |
763 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
764 | msg->msg_data[0] = err; | |
765 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
766 | msg->msg.data_len = 1; | |
767 | msg->msg.data = msg->msg_data; | |
768 | deliver_response(msg); | |
769 | } | |
770 | ||
c70d7499 CM |
771 | /* |
772 | * Find the next sequence number not being used and add the given | |
773 | * message with the given timeout to the sequence table. This must be | |
774 | * called with the interface's seq_lock held. | |
775 | */ | |
1da177e4 LT |
776 | static int intf_next_seq(ipmi_smi_t intf, |
777 | struct ipmi_recv_msg *recv_msg, | |
778 | unsigned long timeout, | |
779 | int retries, | |
780 | int broadcast, | |
781 | unsigned char *seq, | |
782 | long *seqid) | |
783 | { | |
784 | int rv = 0; | |
785 | unsigned int i; | |
786 | ||
c70d7499 CM |
787 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
788 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 789 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
790 | break; |
791 | } | |
792 | ||
8a3628d5 | 793 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
794 | intf->seq_table[i].recv_msg = recv_msg; |
795 | ||
c70d7499 CM |
796 | /* |
797 | * Start with the maximum timeout, when the send response | |
798 | * comes in we will start the real timer. | |
799 | */ | |
1da177e4 LT |
800 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
801 | intf->seq_table[i].orig_timeout = timeout; | |
802 | intf->seq_table[i].retries_left = retries; | |
803 | intf->seq_table[i].broadcast = broadcast; | |
804 | intf->seq_table[i].inuse = 1; | |
805 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
806 | *seq = i; | |
807 | *seqid = intf->seq_table[i].seqid; | |
808 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 809 | need_waiter(intf); |
1da177e4 LT |
810 | } else { |
811 | rv = -EAGAIN; | |
812 | } | |
c70d7499 | 813 | |
1da177e4 LT |
814 | return rv; |
815 | } | |
816 | ||
c70d7499 CM |
817 | /* |
818 | * Return the receive message for the given sequence number and | |
819 | * release the sequence number so it can be reused. Some other data | |
820 | * is passed in to be sure the message matches up correctly (to help | |
821 | * guard against message coming in after their timeout and the | |
822 | * sequence number being reused). | |
823 | */ | |
1da177e4 LT |
824 | static int intf_find_seq(ipmi_smi_t intf, |
825 | unsigned char seq, | |
826 | short channel, | |
827 | unsigned char cmd, | |
828 | unsigned char netfn, | |
829 | struct ipmi_addr *addr, | |
830 | struct ipmi_recv_msg **recv_msg) | |
831 | { | |
832 | int rv = -ENODEV; | |
833 | unsigned long flags; | |
834 | ||
835 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
836 | return -EINVAL; | |
837 | ||
838 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
839 | if (intf->seq_table[seq].inuse) { | |
840 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
841 | ||
c70d7499 CM |
842 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
843 | && (msg->msg.netfn == netfn) | |
844 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
845 | *recv_msg = msg; |
846 | intf->seq_table[seq].inuse = 0; | |
847 | rv = 0; | |
848 | } | |
849 | } | |
850 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
851 | ||
852 | return rv; | |
853 | } | |
854 | ||
855 | ||
856 | /* Start the timer for a specific sequence table entry. */ | |
857 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
858 | long msgid) | |
859 | { | |
860 | int rv = -ENODEV; | |
861 | unsigned long flags; | |
862 | unsigned char seq; | |
863 | unsigned long seqid; | |
864 | ||
865 | ||
866 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
867 | ||
868 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
869 | /* |
870 | * We do this verification because the user can be deleted | |
871 | * while a message is outstanding. | |
872 | */ | |
1da177e4 | 873 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 874 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
875 | struct seq_table *ent = &(intf->seq_table[seq]); |
876 | ent->timeout = ent->orig_timeout; | |
877 | rv = 0; | |
878 | } | |
879 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
880 | ||
881 | return rv; | |
882 | } | |
883 | ||
884 | /* Got an error for the send message for a specific sequence number. */ | |
885 | static int intf_err_seq(ipmi_smi_t intf, | |
886 | long msgid, | |
887 | unsigned int err) | |
888 | { | |
889 | int rv = -ENODEV; | |
890 | unsigned long flags; | |
891 | unsigned char seq; | |
892 | unsigned long seqid; | |
893 | struct ipmi_recv_msg *msg = NULL; | |
894 | ||
895 | ||
896 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
897 | ||
898 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
899 | /* |
900 | * We do this verification because the user can be deleted | |
901 | * while a message is outstanding. | |
902 | */ | |
1da177e4 | 903 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 904 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
905 | struct seq_table *ent = &(intf->seq_table[seq]); |
906 | ||
907 | ent->inuse = 0; | |
908 | msg = ent->recv_msg; | |
909 | rv = 0; | |
910 | } | |
911 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
912 | ||
b2c03941 CM |
913 | if (msg) |
914 | deliver_err_response(msg, err); | |
1da177e4 LT |
915 | |
916 | return rv; | |
917 | } | |
918 | ||
919 | ||
920 | int ipmi_create_user(unsigned int if_num, | |
921 | struct ipmi_user_hndl *handler, | |
922 | void *handler_data, | |
923 | ipmi_user_t *user) | |
924 | { | |
925 | unsigned long flags; | |
926 | ipmi_user_t new_user; | |
927 | int rv = 0; | |
928 | ipmi_smi_t intf; | |
929 | ||
c70d7499 CM |
930 | /* |
931 | * There is no module usecount here, because it's not | |
932 | * required. Since this can only be used by and called from | |
933 | * other modules, they will implicitly use this module, and | |
934 | * thus this can't be removed unless the other modules are | |
935 | * removed. | |
936 | */ | |
1da177e4 LT |
937 | |
938 | if (handler == NULL) | |
939 | return -EINVAL; | |
940 | ||
c70d7499 CM |
941 | /* |
942 | * Make sure the driver is actually initialized, this handles | |
943 | * problems with initialization order. | |
944 | */ | |
1da177e4 LT |
945 | if (!initialized) { |
946 | rv = ipmi_init_msghandler(); | |
947 | if (rv) | |
948 | return rv; | |
949 | ||
c70d7499 CM |
950 | /* |
951 | * The init code doesn't return an error if it was turned | |
952 | * off, but it won't initialize. Check that. | |
953 | */ | |
1da177e4 LT |
954 | if (!initialized) |
955 | return -ENODEV; | |
956 | } | |
957 | ||
958 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 959 | if (!new_user) |
1da177e4 LT |
960 | return -ENOMEM; |
961 | ||
b2c03941 | 962 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
963 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
964 | if (intf->intf_num == if_num) | |
965 | goto found; | |
1da177e4 | 966 | } |
b2c03941 | 967 | /* Not found, return an error */ |
bca0324d CM |
968 | rv = -EINVAL; |
969 | goto out_kfree; | |
1da177e4 | 970 | |
bca0324d | 971 | found: |
393d2cc3 CM |
972 | /* Note that each existing user holds a refcount to the interface. */ |
973 | kref_get(&intf->refcount); | |
1da177e4 | 974 | |
393d2cc3 | 975 | kref_init(&new_user->refcount); |
1da177e4 LT |
976 | new_user->handler = handler; |
977 | new_user->handler_data = handler_data; | |
978 | new_user->intf = intf; | |
89986496 | 979 | new_user->gets_events = false; |
1da177e4 LT |
980 | |
981 | if (!try_module_get(intf->handlers->owner)) { | |
982 | rv = -ENODEV; | |
5c98d29a | 983 | goto out_kref; |
1da177e4 LT |
984 | } |
985 | ||
986 | if (intf->handlers->inc_usecount) { | |
987 | rv = intf->handlers->inc_usecount(intf->send_info); | |
988 | if (rv) { | |
989 | module_put(intf->handlers->owner); | |
5c98d29a | 990 | goto out_kref; |
1da177e4 LT |
991 | } |
992 | } | |
993 | ||
c70d7499 CM |
994 | /* |
995 | * Hold the lock so intf->handlers is guaranteed to be good | |
996 | * until now | |
997 | */ | |
b2c03941 CM |
998 | mutex_unlock(&ipmi_interfaces_mutex); |
999 | ||
7aefac26 | 1000 | new_user->valid = true; |
393d2cc3 CM |
1001 | spin_lock_irqsave(&intf->seq_lock, flags); |
1002 | list_add_rcu(&new_user->link, &intf->users); | |
1003 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
1004 | if (handler->ipmi_watchdog_pretimeout) { |
1005 | /* User wants pretimeouts, so make sure to watch for them. */ | |
1006 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1007 | need_waiter(intf); | |
1008 | } | |
393d2cc3 CM |
1009 | *user = new_user; |
1010 | return 0; | |
1da177e4 | 1011 | |
5c98d29a | 1012 | out_kref: |
393d2cc3 | 1013 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 1014 | out_kfree: |
b2c03941 | 1015 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 1016 | kfree(new_user); |
1da177e4 LT |
1017 | return rv; |
1018 | } | |
c70d7499 | 1019 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1020 | |
16f4232c ZY |
1021 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1022 | { | |
1023 | int rv = 0; | |
1024 | ipmi_smi_t intf; | |
81d02b7f | 1025 | const struct ipmi_smi_handlers *handlers; |
16f4232c ZY |
1026 | |
1027 | mutex_lock(&ipmi_interfaces_mutex); | |
1028 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1029 | if (intf->intf_num == if_num) | |
1030 | goto found; | |
1031 | } | |
1032 | /* Not found, return an error */ | |
1033 | rv = -EINVAL; | |
1034 | mutex_unlock(&ipmi_interfaces_mutex); | |
1035 | return rv; | |
1036 | ||
1037 | found: | |
1038 | handlers = intf->handlers; | |
1039 | rv = -ENOSYS; | |
1040 | if (handlers->get_smi_info) | |
1041 | rv = handlers->get_smi_info(intf->send_info, data); | |
1042 | mutex_unlock(&ipmi_interfaces_mutex); | |
1043 | ||
1044 | return rv; | |
1045 | } | |
1046 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1047 | ||
393d2cc3 CM |
1048 | static void free_user(struct kref *ref) |
1049 | { | |
1050 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1051 | kfree(user); | |
1052 | } | |
1053 | ||
1054 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1055 | { |
393d2cc3 | 1056 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1057 | int i; |
1058 | unsigned long flags; | |
393d2cc3 | 1059 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1060 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1061 | |
7aefac26 | 1062 | user->valid = false; |
1da177e4 | 1063 | |
89986496 CM |
1064 | if (user->handler->ipmi_watchdog_pretimeout) |
1065 | atomic_dec(&intf->event_waiters); | |
1066 | ||
1067 | if (user->gets_events) | |
1068 | atomic_dec(&intf->event_waiters); | |
1069 | ||
393d2cc3 CM |
1070 | /* Remove the user from the interface's sequence table. */ |
1071 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1072 | list_del_rcu(&user->link); | |
1da177e4 | 1073 | |
e8b33617 | 1074 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1075 | if (intf->seq_table[i].inuse |
c70d7499 | 1076 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1077 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1078 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1079 | } |
1080 | } | |
393d2cc3 CM |
1081 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1082 | ||
1083 | /* | |
1084 | * Remove the user from the command receiver's table. First | |
1085 | * we build a list of everything (not using the standard link, | |
1086 | * since other things may be using it till we do | |
1087 | * synchronize_rcu()) then free everything in that list. | |
1088 | */ | |
d6dfd131 | 1089 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1090 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1091 | if (rcvr->user == user) { |
393d2cc3 CM |
1092 | list_del_rcu(&rcvr->link); |
1093 | rcvr->next = rcvrs; | |
1094 | rcvrs = rcvr; | |
1da177e4 LT |
1095 | } |
1096 | } | |
d6dfd131 | 1097 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1098 | synchronize_rcu(); |
1099 | while (rcvrs) { | |
1100 | rcvr = rcvrs; | |
1101 | rcvrs = rcvr->next; | |
1102 | kfree(rcvr); | |
1103 | } | |
1da177e4 | 1104 | |
b2c03941 CM |
1105 | mutex_lock(&ipmi_interfaces_mutex); |
1106 | if (intf->handlers) { | |
1107 | module_put(intf->handlers->owner); | |
1108 | if (intf->handlers->dec_usecount) | |
1109 | intf->handlers->dec_usecount(intf->send_info); | |
1110 | } | |
1111 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1112 | |
393d2cc3 | 1113 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1114 | |
393d2cc3 | 1115 | kref_put(&user->refcount, free_user); |
1da177e4 | 1116 | |
8a3628d5 | 1117 | return 0; |
1da177e4 | 1118 | } |
c70d7499 | 1119 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1120 | |
1121 | void ipmi_get_version(ipmi_user_t user, | |
1122 | unsigned char *major, | |
1123 | unsigned char *minor) | |
1124 | { | |
b2c03941 CM |
1125 | *major = user->intf->ipmi_version_major; |
1126 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1127 | } |
c70d7499 | 1128 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1129 | |
c14979b9 CM |
1130 | int ipmi_set_my_address(ipmi_user_t user, |
1131 | unsigned int channel, | |
1132 | unsigned char address) | |
1da177e4 | 1133 | { |
c14979b9 CM |
1134 | if (channel >= IPMI_MAX_CHANNELS) |
1135 | return -EINVAL; | |
1136 | user->intf->channels[channel].address = address; | |
1137 | return 0; | |
1da177e4 | 1138 | } |
c70d7499 | 1139 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1140 | |
c14979b9 CM |
1141 | int ipmi_get_my_address(ipmi_user_t user, |
1142 | unsigned int channel, | |
1143 | unsigned char *address) | |
1da177e4 | 1144 | { |
c14979b9 CM |
1145 | if (channel >= IPMI_MAX_CHANNELS) |
1146 | return -EINVAL; | |
1147 | *address = user->intf->channels[channel].address; | |
1148 | return 0; | |
1da177e4 | 1149 | } |
c70d7499 | 1150 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1151 | |
c14979b9 CM |
1152 | int ipmi_set_my_LUN(ipmi_user_t user, |
1153 | unsigned int channel, | |
1154 | unsigned char LUN) | |
1da177e4 | 1155 | { |
c14979b9 CM |
1156 | if (channel >= IPMI_MAX_CHANNELS) |
1157 | return -EINVAL; | |
1158 | user->intf->channels[channel].lun = LUN & 0x3; | |
1159 | return 0; | |
1da177e4 | 1160 | } |
c70d7499 | 1161 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1162 | |
c14979b9 CM |
1163 | int ipmi_get_my_LUN(ipmi_user_t user, |
1164 | unsigned int channel, | |
1165 | unsigned char *address) | |
1da177e4 | 1166 | { |
c14979b9 CM |
1167 | if (channel >= IPMI_MAX_CHANNELS) |
1168 | return -EINVAL; | |
1169 | *address = user->intf->channels[channel].lun; | |
1170 | return 0; | |
1da177e4 | 1171 | } |
c70d7499 | 1172 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1173 | |
b9675136 CM |
1174 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1175 | { | |
1176 | int mode; | |
1177 | unsigned long flags; | |
1178 | ||
1179 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1180 | mode = user->intf->maintenance_mode; | |
1181 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1182 | ||
1183 | return mode; | |
1184 | } | |
1185 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1186 | ||
1187 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1188 | { | |
1189 | if (intf->handlers->set_maintenance_mode) | |
1190 | intf->handlers->set_maintenance_mode( | |
1191 | intf->send_info, intf->maintenance_mode_enable); | |
1192 | } | |
1193 | ||
1194 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1195 | { | |
1196 | int rv = 0; | |
1197 | unsigned long flags; | |
1198 | ipmi_smi_t intf = user->intf; | |
1199 | ||
1200 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1201 | if (intf->maintenance_mode != mode) { | |
1202 | switch (mode) { | |
1203 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1204 | intf->maintenance_mode_enable |
1205 | = (intf->auto_maintenance_timeout > 0); | |
1206 | break; | |
1207 | ||
1208 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1209 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1210 | break; |
1211 | ||
1212 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1213 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1214 | break; |
1215 | ||
1216 | default: | |
1217 | rv = -EINVAL; | |
1218 | goto out_unlock; | |
1219 | } | |
7aefac26 | 1220 | intf->maintenance_mode = mode; |
b9675136 CM |
1221 | |
1222 | maintenance_mode_update(intf); | |
1223 | } | |
1224 | out_unlock: | |
1225 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1226 | ||
1227 | return rv; | |
1228 | } | |
1229 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1230 | ||
89986496 | 1231 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1232 | { |
393d2cc3 CM |
1233 | unsigned long flags; |
1234 | ipmi_smi_t intf = user->intf; | |
1235 | struct ipmi_recv_msg *msg, *msg2; | |
1236 | struct list_head msgs; | |
1da177e4 | 1237 | |
393d2cc3 CM |
1238 | INIT_LIST_HEAD(&msgs); |
1239 | ||
1240 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1241 | if (user->gets_events == val) |
1242 | goto out; | |
1243 | ||
1da177e4 LT |
1244 | user->gets_events = val; |
1245 | ||
89986496 CM |
1246 | if (val) { |
1247 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1248 | need_waiter(intf); | |
1249 | } else { | |
1250 | atomic_dec(&intf->event_waiters); | |
1251 | } | |
1252 | ||
b2c03941 CM |
1253 | if (intf->delivering_events) |
1254 | /* | |
1255 | * Another thread is delivering events for this, so | |
1256 | * let it handle any new events. | |
1257 | */ | |
1258 | goto out; | |
1259 | ||
1260 | /* Deliver any queued events. */ | |
1261 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1262 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1263 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1264 | intf->waiting_events_count = 0; |
87ebd06f CM |
1265 | if (intf->event_msg_printed) { |
1266 | printk(KERN_WARNING PFX "Event queue no longer" | |
1267 | " full\n"); | |
1268 | intf->event_msg_printed = 0; | |
1269 | } | |
393d2cc3 | 1270 | |
b2c03941 CM |
1271 | intf->delivering_events = 1; |
1272 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1273 | ||
1274 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1275 | msg->user = user; | |
1276 | kref_get(&user->refcount); | |
1277 | deliver_response(msg); | |
1278 | } | |
1279 | ||
1280 | spin_lock_irqsave(&intf->events_lock, flags); | |
1281 | intf->delivering_events = 0; | |
393d2cc3 CM |
1282 | } |
1283 | ||
b2c03941 | 1284 | out: |
393d2cc3 | 1285 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1286 | |
1287 | return 0; | |
1288 | } | |
c70d7499 | 1289 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1290 | |
393d2cc3 CM |
1291 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1292 | unsigned char netfn, | |
c69c3127 CM |
1293 | unsigned char cmd, |
1294 | unsigned char chan) | |
393d2cc3 CM |
1295 | { |
1296 | struct cmd_rcvr *rcvr; | |
1297 | ||
1298 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1299 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1300 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1301 | return rcvr; |
1302 | } | |
1303 | return NULL; | |
1304 | } | |
1305 | ||
c69c3127 CM |
1306 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1307 | unsigned char netfn, | |
1308 | unsigned char cmd, | |
1309 | unsigned int chans) | |
1310 | { | |
1311 | struct cmd_rcvr *rcvr; | |
1312 | ||
1313 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1314 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1315 | && (rcvr->chans & chans)) | |
1316 | return 0; | |
1317 | } | |
1318 | return 1; | |
1319 | } | |
1320 | ||
1da177e4 LT |
1321 | int ipmi_register_for_cmd(ipmi_user_t user, |
1322 | unsigned char netfn, | |
c69c3127 CM |
1323 | unsigned char cmd, |
1324 | unsigned int chans) | |
1da177e4 | 1325 | { |
393d2cc3 CM |
1326 | ipmi_smi_t intf = user->intf; |
1327 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1328 | int rv = 0; |
1da177e4 LT |
1329 | |
1330 | ||
1331 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1332 | if (!rcvr) |
1da177e4 | 1333 | return -ENOMEM; |
393d2cc3 CM |
1334 | rcvr->cmd = cmd; |
1335 | rcvr->netfn = netfn; | |
c69c3127 | 1336 | rcvr->chans = chans; |
393d2cc3 | 1337 | rcvr->user = user; |
1da177e4 | 1338 | |
d6dfd131 | 1339 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1340 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1341 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1342 | rv = -EBUSY; |
1343 | goto out_unlock; | |
1da177e4 | 1344 | } |
877197ef | 1345 | |
89986496 CM |
1346 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1347 | need_waiter(intf); | |
1348 | ||
393d2cc3 | 1349 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1350 | |
393d2cc3 | 1351 | out_unlock: |
d6dfd131 | 1352 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1353 | if (rv) |
1354 | kfree(rcvr); | |
1355 | ||
1356 | return rv; | |
1357 | } | |
c70d7499 | 1358 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1359 | |
1360 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1361 | unsigned char netfn, | |
c69c3127 CM |
1362 | unsigned char cmd, |
1363 | unsigned int chans) | |
1da177e4 | 1364 | { |
393d2cc3 CM |
1365 | ipmi_smi_t intf = user->intf; |
1366 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1367 | struct cmd_rcvr *rcvrs = NULL; |
1368 | int i, rv = -ENOENT; | |
1da177e4 | 1369 | |
d6dfd131 | 1370 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1371 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1372 | if (((1 << i) & chans) == 0) | |
1373 | continue; | |
1374 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1375 | if (rcvr == NULL) | |
1376 | continue; | |
1377 | if (rcvr->user == user) { | |
1378 | rv = 0; | |
1379 | rcvr->chans &= ~chans; | |
1380 | if (rcvr->chans == 0) { | |
1381 | list_del_rcu(&rcvr->link); | |
1382 | rcvr->next = rcvrs; | |
1383 | rcvrs = rcvr; | |
1384 | } | |
1385 | } | |
1386 | } | |
1387 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1388 | synchronize_rcu(); | |
1389 | while (rcvrs) { | |
89986496 | 1390 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1391 | rcvr = rcvrs; |
1392 | rcvrs = rcvr->next; | |
393d2cc3 | 1393 | kfree(rcvr); |
1da177e4 | 1394 | } |
c69c3127 | 1395 | return rv; |
1da177e4 | 1396 | } |
c70d7499 | 1397 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1398 | |
1da177e4 LT |
1399 | static unsigned char |
1400 | ipmb_checksum(unsigned char *data, int size) | |
1401 | { | |
1402 | unsigned char csum = 0; | |
c70d7499 | 1403 | |
1da177e4 LT |
1404 | for (; size > 0; size--, data++) |
1405 | csum += *data; | |
1406 | ||
1407 | return -csum; | |
1408 | } | |
1409 | ||
1410 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1411 | struct kernel_ipmi_msg *msg, | |
1412 | struct ipmi_ipmb_addr *ipmb_addr, | |
1413 | long msgid, | |
1414 | unsigned char ipmb_seq, | |
1415 | int broadcast, | |
1416 | unsigned char source_address, | |
1417 | unsigned char source_lun) | |
1418 | { | |
1419 | int i = broadcast; | |
1420 | ||
1421 | /* Format the IPMB header data. */ | |
1422 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1423 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1424 | smi_msg->data[2] = ipmb_addr->channel; | |
1425 | if (broadcast) | |
1426 | smi_msg->data[3] = 0; | |
1427 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1428 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1429 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1430 | smi_msg->data[i+6] = source_address; | |
1431 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1432 | smi_msg->data[i+8] = msg->cmd; | |
1433 | ||
1434 | /* Now tack on the data to the message. */ | |
1435 | if (msg->data_len > 0) | |
1436 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1437 | msg->data_len); | |
1438 | smi_msg->data_size = msg->data_len + 9; | |
1439 | ||
1440 | /* Now calculate the checksum and tack it on. */ | |
1441 | smi_msg->data[i+smi_msg->data_size] | |
1442 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1443 | smi_msg->data_size-6); | |
1444 | ||
c70d7499 CM |
1445 | /* |
1446 | * Add on the checksum size and the offset from the | |
1447 | * broadcast. | |
1448 | */ | |
1da177e4 LT |
1449 | smi_msg->data_size += 1 + i; |
1450 | ||
1451 | smi_msg->msgid = msgid; | |
1452 | } | |
1453 | ||
1454 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1455 | struct kernel_ipmi_msg *msg, | |
1456 | struct ipmi_lan_addr *lan_addr, | |
1457 | long msgid, | |
1458 | unsigned char ipmb_seq, | |
1459 | unsigned char source_lun) | |
1460 | { | |
1461 | /* Format the IPMB header data. */ | |
1462 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1463 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1464 | smi_msg->data[2] = lan_addr->channel; | |
1465 | smi_msg->data[3] = lan_addr->session_handle; | |
1466 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1467 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1468 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1469 | smi_msg->data[7] = lan_addr->local_SWID; | |
1470 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1471 | smi_msg->data[9] = msg->cmd; | |
1472 | ||
1473 | /* Now tack on the data to the message. */ | |
1474 | if (msg->data_len > 0) | |
1475 | memcpy(&(smi_msg->data[10]), msg->data, | |
1476 | msg->data_len); | |
1477 | smi_msg->data_size = msg->data_len + 10; | |
1478 | ||
1479 | /* Now calculate the checksum and tack it on. */ | |
1480 | smi_msg->data[smi_msg->data_size] | |
1481 | = ipmb_checksum(&(smi_msg->data[7]), | |
1482 | smi_msg->data_size-7); | |
1483 | ||
c70d7499 CM |
1484 | /* |
1485 | * Add on the checksum size and the offset from the | |
1486 | * broadcast. | |
1487 | */ | |
1da177e4 LT |
1488 | smi_msg->data_size += 1; |
1489 | ||
1490 | smi_msg->msgid = msgid; | |
1491 | } | |
1492 | ||
191cc414 AB |
1493 | static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf, |
1494 | struct ipmi_smi_msg *smi_msg, | |
1495 | int priority) | |
7f4a1c84 | 1496 | { |
7ea0ed2b CM |
1497 | if (intf->curr_msg) { |
1498 | if (priority > 0) | |
1499 | list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs); | |
1500 | else | |
1501 | list_add_tail(&smi_msg->link, &intf->xmit_msgs); | |
1502 | smi_msg = NULL; | |
1503 | } else { | |
1504 | intf->curr_msg = smi_msg; | |
1505 | } | |
191cc414 AB |
1506 | |
1507 | return smi_msg; | |
1508 | } | |
1509 | ||
1510 | ||
81d02b7f | 1511 | static void smi_send(ipmi_smi_t intf, const struct ipmi_smi_handlers *handlers, |
191cc414 AB |
1512 | struct ipmi_smi_msg *smi_msg, int priority) |
1513 | { | |
1514 | int run_to_completion = intf->run_to_completion; | |
1515 | ||
1516 | if (run_to_completion) { | |
1517 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
1518 | } else { | |
1519 | unsigned long flags; | |
1520 | ||
1521 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
1522 | smi_msg = smi_add_send_msg(intf, smi_msg, priority); | |
7ea0ed2b | 1523 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
191cc414 | 1524 | } |
7ea0ed2b CM |
1525 | |
1526 | if (smi_msg) | |
99ab32f3 | 1527 | handlers->sender(intf->send_info, smi_msg); |
7f4a1c84 CM |
1528 | } |
1529 | ||
c70d7499 CM |
1530 | /* |
1531 | * Separate from ipmi_request so that the user does not have to be | |
1532 | * supplied in certain circumstances (mainly at panic time). If | |
1533 | * messages are supplied, they will be freed, even if an error | |
1534 | * occurs. | |
1535 | */ | |
393d2cc3 CM |
1536 | static int i_ipmi_request(ipmi_user_t user, |
1537 | ipmi_smi_t intf, | |
1538 | struct ipmi_addr *addr, | |
1539 | long msgid, | |
1540 | struct kernel_ipmi_msg *msg, | |
1541 | void *user_msg_data, | |
1542 | void *supplied_smi, | |
1543 | struct ipmi_recv_msg *supplied_recv, | |
1544 | int priority, | |
1545 | unsigned char source_address, | |
1546 | unsigned char source_lun, | |
1547 | int retries, | |
1548 | unsigned int retry_time_ms) | |
1da177e4 | 1549 | { |
b2c03941 CM |
1550 | int rv = 0; |
1551 | struct ipmi_smi_msg *smi_msg; | |
1552 | struct ipmi_recv_msg *recv_msg; | |
1553 | unsigned long flags; | |
1da177e4 LT |
1554 | |
1555 | ||
c70d7499 | 1556 | if (supplied_recv) |
1da177e4 | 1557 | recv_msg = supplied_recv; |
c70d7499 | 1558 | else { |
1da177e4 | 1559 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1560 | if (recv_msg == NULL) |
1da177e4 | 1561 | return -ENOMEM; |
1da177e4 LT |
1562 | } |
1563 | recv_msg->user_msg_data = user_msg_data; | |
1564 | ||
c70d7499 | 1565 | if (supplied_smi) |
1da177e4 | 1566 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1567 | else { |
1da177e4 LT |
1568 | smi_msg = ipmi_alloc_smi_msg(); |
1569 | if (smi_msg == NULL) { | |
1570 | ipmi_free_recv_msg(recv_msg); | |
1571 | return -ENOMEM; | |
1572 | } | |
1573 | } | |
1574 | ||
b2c03941 | 1575 | rcu_read_lock(); |
7ea0ed2b | 1576 | if (intf->in_shutdown) { |
b2c03941 CM |
1577 | rv = -ENODEV; |
1578 | goto out_err; | |
1579 | } | |
1580 | ||
1da177e4 | 1581 | recv_msg->user = user; |
393d2cc3 CM |
1582 | if (user) |
1583 | kref_get(&user->refcount); | |
1da177e4 | 1584 | recv_msg->msgid = msgid; |
c70d7499 CM |
1585 | /* |
1586 | * Store the message to send in the receive message so timeout | |
1587 | * responses can get the proper response data. | |
1588 | */ | |
1da177e4 LT |
1589 | recv_msg->msg = *msg; |
1590 | ||
1591 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1592 | struct ipmi_system_interface_addr *smi_addr; | |
1593 | ||
1594 | if (msg->netfn & 1) { | |
1595 | /* Responses are not allowed to the SMI. */ | |
1596 | rv = -EINVAL; | |
1597 | goto out_err; | |
1598 | } | |
1599 | ||
1600 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1601 | if (smi_addr->lun > 3) { | |
b2655f26 | 1602 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1603 | rv = -EINVAL; |
1604 | goto out_err; | |
1605 | } | |
1606 | ||
1607 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1608 | ||
1609 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1610 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1611 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1612 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1613 | /* | |
1614 | * We don't let the user do these, since we manage | |
1615 | * the sequence numbers. | |
1616 | */ | |
b2655f26 | 1617 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1618 | rv = -EINVAL; |
1619 | goto out_err; | |
1620 | } | |
1621 | ||
b9675136 CM |
1622 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1623 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1624 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1625 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1626 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1627 | intf->auto_maintenance_timeout | |
1628 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1629 | if (!intf->maintenance_mode | |
c70d7499 | 1630 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1631 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1632 | maintenance_mode_update(intf); |
1633 | } | |
1634 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1635 | flags); | |
1636 | } | |
1637 | ||
1da177e4 | 1638 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1639 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1640 | rv = -EMSGSIZE; |
1641 | goto out_err; | |
1642 | } | |
1643 | ||
1644 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1645 | smi_msg->data[1] = msg->cmd; | |
1646 | smi_msg->msgid = msgid; | |
1647 | smi_msg->user_data = recv_msg; | |
1648 | if (msg->data_len > 0) | |
1649 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1650 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1651 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1652 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1653 | struct ipmi_ipmb_addr *ipmb_addr; |
1654 | unsigned char ipmb_seq; | |
1655 | long seqid; | |
1656 | int broadcast = 0; | |
1657 | ||
9c101fd4 | 1658 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1659 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1660 | rv = -EINVAL; |
1661 | goto out_err; | |
1662 | } | |
1663 | ||
1664 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1665 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1666 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1667 | rv = -EINVAL; |
1668 | goto out_err; | |
1669 | } | |
1670 | ||
1671 | if (retries < 0) { | |
1672 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1673 | retries = 0; /* Don't retry broadcasts. */ | |
1674 | else | |
1675 | retries = 4; | |
1676 | } | |
1677 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1678 | /* |
1679 | * Broadcasts add a zero at the beginning of the | |
1680 | * message, but otherwise is the same as an IPMB | |
1681 | * address. | |
1682 | */ | |
1da177e4 LT |
1683 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1684 | broadcast = 1; | |
1685 | } | |
1686 | ||
1687 | ||
1688 | /* Default to 1 second retries. */ | |
1689 | if (retry_time_ms == 0) | |
1690 | retry_time_ms = 1000; | |
1691 | ||
c70d7499 CM |
1692 | /* |
1693 | * 9 for the header and 1 for the checksum, plus | |
1694 | * possibly one for the broadcast. | |
1695 | */ | |
1da177e4 | 1696 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1697 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1698 | rv = -EMSGSIZE; |
1699 | goto out_err; | |
1700 | } | |
1701 | ||
1702 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1703 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1704 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1705 | rv = -EINVAL; |
1706 | goto out_err; | |
1707 | } | |
1708 | ||
1709 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1710 | ||
1711 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1712 | /* |
1713 | * It's a response, so use the user's sequence | |
1714 | * from msgid. | |
1715 | */ | |
b2655f26 | 1716 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1717 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1718 | msgid, broadcast, | |
1719 | source_address, source_lun); | |
1720 | ||
c70d7499 CM |
1721 | /* |
1722 | * Save the receive message so we can use it | |
1723 | * to deliver the response. | |
1724 | */ | |
1da177e4 LT |
1725 | smi_msg->user_data = recv_msg; |
1726 | } else { | |
1727 | /* It's a command, so get a sequence for it. */ | |
1728 | ||
1729 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1730 | ||
c70d7499 CM |
1731 | /* |
1732 | * Create a sequence number with a 1 second | |
1733 | * timeout and 4 retries. | |
1734 | */ | |
1da177e4 LT |
1735 | rv = intf_next_seq(intf, |
1736 | recv_msg, | |
1737 | retry_time_ms, | |
1738 | retries, | |
1739 | broadcast, | |
1740 | &ipmb_seq, | |
1741 | &seqid); | |
1742 | if (rv) { | |
c70d7499 CM |
1743 | /* |
1744 | * We have used up all the sequence numbers, | |
1745 | * probably, so abort. | |
1746 | */ | |
1da177e4 LT |
1747 | spin_unlock_irqrestore(&(intf->seq_lock), |
1748 | flags); | |
1749 | goto out_err; | |
1750 | } | |
1751 | ||
25176ed6 CM |
1752 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1753 | ||
c70d7499 CM |
1754 | /* |
1755 | * Store the sequence number in the message, | |
1756 | * so that when the send message response | |
1757 | * comes back we can start the timer. | |
1758 | */ | |
1da177e4 LT |
1759 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1760 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1761 | ipmb_seq, broadcast, | |
1762 | source_address, source_lun); | |
1763 | ||
c70d7499 CM |
1764 | /* |
1765 | * Copy the message into the recv message data, so we | |
1766 | * can retransmit it later if necessary. | |
1767 | */ | |
1da177e4 LT |
1768 | memcpy(recv_msg->msg_data, smi_msg->data, |
1769 | smi_msg->data_size); | |
1770 | recv_msg->msg.data = recv_msg->msg_data; | |
1771 | recv_msg->msg.data_len = smi_msg->data_size; | |
1772 | ||
c70d7499 CM |
1773 | /* |
1774 | * We don't unlock until here, because we need | |
1775 | * to copy the completed message into the | |
1776 | * recv_msg before we release the lock. | |
1777 | * Otherwise, race conditions may bite us. I | |
1778 | * know that's pretty paranoid, but I prefer | |
1779 | * to be correct. | |
1780 | */ | |
1da177e4 LT |
1781 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1782 | } | |
25176ed6 | 1783 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1784 | struct ipmi_lan_addr *lan_addr; |
1785 | unsigned char ipmb_seq; | |
1786 | long seqid; | |
1787 | ||
12fc1d7b | 1788 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1789 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1790 | rv = -EINVAL; |
1791 | goto out_err; | |
1792 | } | |
1793 | ||
1794 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1795 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1796 | && (intf->channels[addr->channel].medium |
c70d7499 | 1797 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1798 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1799 | rv = -EINVAL; |
1800 | goto out_err; | |
1801 | } | |
1802 | ||
1803 | retries = 4; | |
1804 | ||
1805 | /* Default to 1 second retries. */ | |
1806 | if (retry_time_ms == 0) | |
1807 | retry_time_ms = 1000; | |
1808 | ||
1809 | /* 11 for the header and 1 for the checksum. */ | |
1810 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1811 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1812 | rv = -EMSGSIZE; |
1813 | goto out_err; | |
1814 | } | |
1815 | ||
1816 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1817 | if (lan_addr->lun > 3) { | |
b2655f26 | 1818 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1819 | rv = -EINVAL; |
1820 | goto out_err; | |
1821 | } | |
1822 | ||
1823 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1824 | ||
1825 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1826 | /* |
1827 | * It's a response, so use the user's sequence | |
1828 | * from msgid. | |
1829 | */ | |
b2655f26 | 1830 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1831 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1832 | msgid, source_lun); | |
1833 | ||
c70d7499 CM |
1834 | /* |
1835 | * Save the receive message so we can use it | |
1836 | * to deliver the response. | |
1837 | */ | |
1da177e4 LT |
1838 | smi_msg->user_data = recv_msg; |
1839 | } else { | |
1840 | /* It's a command, so get a sequence for it. */ | |
1841 | ||
1842 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1843 | ||
c70d7499 CM |
1844 | /* |
1845 | * Create a sequence number with a 1 second | |
1846 | * timeout and 4 retries. | |
1847 | */ | |
1da177e4 LT |
1848 | rv = intf_next_seq(intf, |
1849 | recv_msg, | |
1850 | retry_time_ms, | |
1851 | retries, | |
1852 | 0, | |
1853 | &ipmb_seq, | |
1854 | &seqid); | |
1855 | if (rv) { | |
c70d7499 CM |
1856 | /* |
1857 | * We have used up all the sequence numbers, | |
1858 | * probably, so abort. | |
1859 | */ | |
1da177e4 LT |
1860 | spin_unlock_irqrestore(&(intf->seq_lock), |
1861 | flags); | |
1862 | goto out_err; | |
1863 | } | |
1864 | ||
25176ed6 CM |
1865 | ipmi_inc_stat(intf, sent_lan_commands); |
1866 | ||
c70d7499 CM |
1867 | /* |
1868 | * Store the sequence number in the message, | |
1869 | * so that when the send message response | |
1870 | * comes back we can start the timer. | |
1871 | */ | |
1da177e4 LT |
1872 | format_lan_msg(smi_msg, msg, lan_addr, |
1873 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1874 | ipmb_seq, source_lun); | |
1875 | ||
c70d7499 CM |
1876 | /* |
1877 | * Copy the message into the recv message data, so we | |
1878 | * can retransmit it later if necessary. | |
1879 | */ | |
1da177e4 LT |
1880 | memcpy(recv_msg->msg_data, smi_msg->data, |
1881 | smi_msg->data_size); | |
1882 | recv_msg->msg.data = recv_msg->msg_data; | |
1883 | recv_msg->msg.data_len = smi_msg->data_size; | |
1884 | ||
c70d7499 CM |
1885 | /* |
1886 | * We don't unlock until here, because we need | |
1887 | * to copy the completed message into the | |
1888 | * recv_msg before we release the lock. | |
1889 | * Otherwise, race conditions may bite us. I | |
1890 | * know that's pretty paranoid, but I prefer | |
1891 | * to be correct. | |
1892 | */ | |
1da177e4 LT |
1893 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1894 | } | |
1895 | } else { | |
1896 | /* Unknown address type. */ | |
b2655f26 | 1897 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1898 | rv = -EINVAL; |
1899 | goto out_err; | |
1900 | } | |
1901 | ||
1902 | #ifdef DEBUG_MSGING | |
1903 | { | |
1904 | int m; | |
e8b33617 | 1905 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1906 | printk(" %2.2x", smi_msg->data[m]); |
1907 | printk("\n"); | |
1908 | } | |
1909 | #endif | |
b2c03941 | 1910 | |
7ea0ed2b | 1911 | smi_send(intf, intf->handlers, smi_msg, priority); |
b2c03941 | 1912 | rcu_read_unlock(); |
1da177e4 LT |
1913 | |
1914 | return 0; | |
1915 | ||
1916 | out_err: | |
b2c03941 | 1917 | rcu_read_unlock(); |
1da177e4 LT |
1918 | ipmi_free_smi_msg(smi_msg); |
1919 | ipmi_free_recv_msg(recv_msg); | |
1920 | return rv; | |
1921 | } | |
1922 | ||
c14979b9 CM |
1923 | static int check_addr(ipmi_smi_t intf, |
1924 | struct ipmi_addr *addr, | |
1925 | unsigned char *saddr, | |
1926 | unsigned char *lun) | |
1927 | { | |
1928 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1929 | return -EINVAL; | |
1930 | *lun = intf->channels[addr->channel].lun; | |
1931 | *saddr = intf->channels[addr->channel].address; | |
1932 | return 0; | |
1933 | } | |
1934 | ||
1da177e4 LT |
1935 | int ipmi_request_settime(ipmi_user_t user, |
1936 | struct ipmi_addr *addr, | |
1937 | long msgid, | |
1938 | struct kernel_ipmi_msg *msg, | |
1939 | void *user_msg_data, | |
1940 | int priority, | |
1941 | int retries, | |
1942 | unsigned int retry_time_ms) | |
1943 | { | |
f0ba9390 | 1944 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1945 | int rv; |
1946 | ||
8a3628d5 | 1947 | if (!user) |
56a55ec6 | 1948 | return -EINVAL; |
c14979b9 CM |
1949 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1950 | if (rv) | |
1951 | return rv; | |
1da177e4 LT |
1952 | return i_ipmi_request(user, |
1953 | user->intf, | |
1954 | addr, | |
1955 | msgid, | |
1956 | msg, | |
1957 | user_msg_data, | |
1958 | NULL, NULL, | |
1959 | priority, | |
c14979b9 CM |
1960 | saddr, |
1961 | lun, | |
1da177e4 LT |
1962 | retries, |
1963 | retry_time_ms); | |
1964 | } | |
c70d7499 | 1965 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
1966 | |
1967 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1968 | struct ipmi_addr *addr, | |
1969 | long msgid, | |
1970 | struct kernel_ipmi_msg *msg, | |
1971 | void *user_msg_data, | |
1972 | void *supplied_smi, | |
1973 | struct ipmi_recv_msg *supplied_recv, | |
1974 | int priority) | |
1975 | { | |
9ebca93b | 1976 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1977 | int rv; |
1978 | ||
8a3628d5 | 1979 | if (!user) |
56a55ec6 | 1980 | return -EINVAL; |
c14979b9 CM |
1981 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1982 | if (rv) | |
1983 | return rv; | |
1da177e4 LT |
1984 | return i_ipmi_request(user, |
1985 | user->intf, | |
1986 | addr, | |
1987 | msgid, | |
1988 | msg, | |
1989 | user_msg_data, | |
1990 | supplied_smi, | |
1991 | supplied_recv, | |
1992 | priority, | |
c14979b9 CM |
1993 | saddr, |
1994 | lun, | |
1da177e4 LT |
1995 | -1, 0); |
1996 | } | |
c70d7499 | 1997 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 1998 | |
1aa16eea | 1999 | #ifdef CONFIG_PROC_FS |
07412736 | 2000 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2001 | { |
07412736 | 2002 | ipmi_smi_t intf = m->private; |
c14979b9 | 2003 | int i; |
1da177e4 | 2004 | |
07412736 AD |
2005 | seq_printf(m, "%x", intf->channels[0].address); |
2006 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) | |
2007 | seq_printf(m, " %x", intf->channels[i].address); | |
d6c5dc18 JP |
2008 | seq_putc(m, '\n'); |
2009 | ||
5e33cd0c | 2010 | return 0; |
1da177e4 LT |
2011 | } |
2012 | ||
07412736 | 2013 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2014 | { |
d9dda78b | 2015 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 2016 | } |
1da177e4 | 2017 | |
07412736 AD |
2018 | static const struct file_operations smi_ipmb_proc_ops = { |
2019 | .open = smi_ipmb_proc_open, | |
2020 | .read = seq_read, | |
2021 | .llseek = seq_lseek, | |
2022 | .release = single_release, | |
2023 | }; | |
2024 | ||
2025 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
2026 | { | |
2027 | ipmi_smi_t intf = m->private; | |
2028 | ||
d6c5dc18 JP |
2029 | seq_printf(m, "%u.%u\n", |
2030 | ipmi_version_major(&intf->bmc->id), | |
2031 | ipmi_version_minor(&intf->bmc->id)); | |
2032 | ||
5e33cd0c | 2033 | return 0; |
1da177e4 LT |
2034 | } |
2035 | ||
07412736 | 2036 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2037 | { |
d9dda78b | 2038 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
2039 | } |
2040 | ||
2041 | static const struct file_operations smi_version_proc_ops = { | |
2042 | .open = smi_version_proc_open, | |
2043 | .read = seq_read, | |
2044 | .llseek = seq_lseek, | |
2045 | .release = single_release, | |
2046 | }; | |
1da177e4 | 2047 | |
07412736 AD |
2048 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
2049 | { | |
2050 | ipmi_smi_t intf = m->private; | |
2051 | ||
2052 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 2053 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 2054 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 2055 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2056 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2057 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2058 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2059 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2060 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2061 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2062 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2063 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2064 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2065 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2066 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2067 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2068 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2069 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2070 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2071 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2072 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2073 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2074 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2075 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2076 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2077 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2078 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2079 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2080 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2081 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2082 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2083 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2084 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2085 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2086 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2087 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2088 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2089 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2090 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2091 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2092 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2093 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2094 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2095 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2096 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2097 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2098 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2099 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2100 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2101 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2102 | seq_printf(m, "events: %u\n", |
b2655f26 | 2103 | ipmi_get_stat(intf, events)); |
07412736 | 2104 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2105 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2106 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2107 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2108 | return 0; |
2109 | } | |
1da177e4 | 2110 | |
07412736 AD |
2111 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2112 | { | |
d9dda78b | 2113 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2114 | } |
07412736 AD |
2115 | |
2116 | static const struct file_operations smi_stats_proc_ops = { | |
2117 | .open = smi_stats_proc_open, | |
2118 | .read = seq_read, | |
2119 | .llseek = seq_lseek, | |
2120 | .release = single_release, | |
2121 | }; | |
1aa16eea | 2122 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2123 | |
2124 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2125 | const struct file_operations *proc_ops, |
99b76233 | 2126 | void *data) |
1da177e4 | 2127 | { |
1da177e4 | 2128 | int rv = 0; |
3b625943 CM |
2129 | #ifdef CONFIG_PROC_FS |
2130 | struct proc_dir_entry *file; | |
1da177e4 LT |
2131 | struct ipmi_proc_entry *entry; |
2132 | ||
2133 | /* Create a list element. */ | |
2134 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2135 | if (!entry) | |
2136 | return -ENOMEM; | |
1b6b698f | 2137 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2138 | if (!entry->name) { |
2139 | kfree(entry); | |
2140 | return -ENOMEM; | |
2141 | } | |
1da177e4 | 2142 | |
07412736 | 2143 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2144 | if (!file) { |
2145 | kfree(entry->name); | |
2146 | kfree(entry); | |
2147 | rv = -ENOMEM; | |
2148 | } else { | |
ac019151 | 2149 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2150 | /* Stick it on the list. */ |
2151 | entry->next = smi->proc_entries; | |
2152 | smi->proc_entries = entry; | |
ac019151 | 2153 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2154 | } |
3b625943 | 2155 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2156 | |
2157 | return rv; | |
2158 | } | |
c70d7499 | 2159 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2160 | |
2161 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2162 | { | |
2163 | int rv = 0; | |
2164 | ||
3b625943 | 2165 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2166 | sprintf(smi->proc_dir_name, "%d", num); |
2167 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2168 | if (!smi->proc_dir) | |
2169 | rv = -ENOMEM; | |
1da177e4 LT |
2170 | |
2171 | if (rv == 0) | |
2172 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2173 | &smi_stats_proc_ops, |
99b76233 | 2174 | smi); |
1da177e4 LT |
2175 | |
2176 | if (rv == 0) | |
2177 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2178 | &smi_ipmb_proc_ops, |
99b76233 | 2179 | smi); |
1da177e4 LT |
2180 | |
2181 | if (rv == 0) | |
2182 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2183 | &smi_version_proc_ops, |
99b76233 | 2184 | smi); |
3b625943 | 2185 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2186 | |
2187 | return rv; | |
2188 | } | |
2189 | ||
2190 | static void remove_proc_entries(ipmi_smi_t smi) | |
2191 | { | |
3b625943 | 2192 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2193 | struct ipmi_proc_entry *entry; |
2194 | ||
ac019151 | 2195 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2196 | while (smi->proc_entries) { |
2197 | entry = smi->proc_entries; | |
2198 | smi->proc_entries = entry->next; | |
2199 | ||
2200 | remove_proc_entry(entry->name, smi->proc_dir); | |
2201 | kfree(entry->name); | |
2202 | kfree(entry); | |
2203 | } | |
ac019151 | 2204 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2205 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2206 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2207 | } |
2208 | ||
50c812b2 CM |
2209 | static int __find_bmc_guid(struct device *dev, void *data) |
2210 | { | |
2211 | unsigned char *id = data; | |
16639eb0 | 2212 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2213 | return memcmp(bmc->guid, id, 16) == 0; |
2214 | } | |
2215 | ||
2216 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2217 | unsigned char *guid) | |
2218 | { | |
2219 | struct device *dev; | |
2220 | ||
2221 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2222 | if (dev) | |
16639eb0 | 2223 | return to_bmc_device(dev); |
50c812b2 CM |
2224 | else |
2225 | return NULL; | |
2226 | } | |
2227 | ||
2228 | struct prod_dev_id { | |
2229 | unsigned int product_id; | |
2230 | unsigned char device_id; | |
2231 | }; | |
2232 | ||
2233 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2234 | { | |
2235 | struct prod_dev_id *id = data; | |
16639eb0 | 2236 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2237 | |
2238 | return (bmc->id.product_id == id->product_id | |
50c812b2 CM |
2239 | && bmc->id.device_id == id->device_id); |
2240 | } | |
2241 | ||
2242 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2243 | struct device_driver *drv, | |
f0b55da0 | 2244 | unsigned int product_id, unsigned char device_id) |
50c812b2 CM |
2245 | { |
2246 | struct prod_dev_id id = { | |
2247 | .product_id = product_id, | |
2248 | .device_id = device_id, | |
2249 | }; | |
2250 | struct device *dev; | |
2251 | ||
2252 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2253 | if (dev) | |
16639eb0 | 2254 | return to_bmc_device(dev); |
50c812b2 CM |
2255 | else |
2256 | return NULL; | |
2257 | } | |
2258 | ||
2259 | static ssize_t device_id_show(struct device *dev, | |
2260 | struct device_attribute *attr, | |
2261 | char *buf) | |
2262 | { | |
16639eb0 | 2263 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2264 | |
2265 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2266 | } | |
9c633317 | 2267 | static DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL); |
50c812b2 | 2268 | |
16639eb0 CM |
2269 | static ssize_t provides_device_sdrs_show(struct device *dev, |
2270 | struct device_attribute *attr, | |
2271 | char *buf) | |
50c812b2 | 2272 | { |
16639eb0 | 2273 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2274 | |
2275 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2276 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 | 2277 | } |
9c633317 CM |
2278 | static DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, |
2279 | NULL); | |
50c812b2 CM |
2280 | |
2281 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2282 | char *buf) | |
2283 | { | |
16639eb0 | 2284 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2285 | |
2286 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2287 | bmc->id.device_revision & 0x0F); |
50c812b2 | 2288 | } |
9c633317 | 2289 | static DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL); |
50c812b2 | 2290 | |
16639eb0 CM |
2291 | static ssize_t firmware_revision_show(struct device *dev, |
2292 | struct device_attribute *attr, | |
2293 | char *buf) | |
50c812b2 | 2294 | { |
16639eb0 | 2295 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2296 | |
2297 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2298 | bmc->id.firmware_revision_2); | |
2299 | } | |
9c633317 | 2300 | static DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL); |
50c812b2 CM |
2301 | |
2302 | static ssize_t ipmi_version_show(struct device *dev, | |
2303 | struct device_attribute *attr, | |
2304 | char *buf) | |
2305 | { | |
16639eb0 | 2306 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2307 | |
2308 | return snprintf(buf, 20, "%u.%u\n", | |
2309 | ipmi_version_major(&bmc->id), | |
2310 | ipmi_version_minor(&bmc->id)); | |
2311 | } | |
9c633317 | 2312 | static DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL); |
50c812b2 CM |
2313 | |
2314 | static ssize_t add_dev_support_show(struct device *dev, | |
2315 | struct device_attribute *attr, | |
2316 | char *buf) | |
2317 | { | |
16639eb0 | 2318 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2319 | |
2320 | return snprintf(buf, 10, "0x%02x\n", | |
2321 | bmc->id.additional_device_support); | |
2322 | } | |
9c633317 CM |
2323 | static DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, |
2324 | NULL); | |
50c812b2 CM |
2325 | |
2326 | static ssize_t manufacturer_id_show(struct device *dev, | |
2327 | struct device_attribute *attr, | |
2328 | char *buf) | |
2329 | { | |
16639eb0 | 2330 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2331 | |
2332 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2333 | } | |
9c633317 | 2334 | static DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL); |
50c812b2 CM |
2335 | |
2336 | static ssize_t product_id_show(struct device *dev, | |
2337 | struct device_attribute *attr, | |
2338 | char *buf) | |
2339 | { | |
16639eb0 | 2340 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2341 | |
2342 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2343 | } | |
9c633317 | 2344 | static DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL); |
50c812b2 CM |
2345 | |
2346 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2347 | struct device_attribute *attr, | |
2348 | char *buf) | |
2349 | { | |
16639eb0 | 2350 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2351 | |
2352 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2353 | bmc->id.aux_firmware_revision[3], | |
2354 | bmc->id.aux_firmware_revision[2], | |
2355 | bmc->id.aux_firmware_revision[1], | |
2356 | bmc->id.aux_firmware_revision[0]); | |
2357 | } | |
9c633317 | 2358 | static DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL); |
50c812b2 CM |
2359 | |
2360 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2361 | char *buf) | |
2362 | { | |
16639eb0 | 2363 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2364 | |
2365 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2366 | (long long) bmc->guid[0], | |
2367 | (long long) bmc->guid[8]); | |
2368 | } | |
9c633317 | 2369 | static DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL); |
16639eb0 CM |
2370 | |
2371 | static struct attribute *bmc_dev_attrs[] = { | |
2372 | &dev_attr_device_id.attr, | |
2373 | &dev_attr_provides_device_sdrs.attr, | |
2374 | &dev_attr_revision.attr, | |
2375 | &dev_attr_firmware_revision.attr, | |
2376 | &dev_attr_ipmi_version.attr, | |
2377 | &dev_attr_additional_device_support.attr, | |
2378 | &dev_attr_manufacturer_id.attr, | |
2379 | &dev_attr_product_id.attr, | |
2d06a0c9 TI |
2380 | &dev_attr_aux_firmware_revision.attr, |
2381 | &dev_attr_guid.attr, | |
16639eb0 CM |
2382 | NULL |
2383 | }; | |
50c812b2 | 2384 | |
2d06a0c9 TI |
2385 | static umode_t bmc_dev_attr_is_visible(struct kobject *kobj, |
2386 | struct attribute *attr, int idx) | |
2387 | { | |
2388 | struct device *dev = kobj_to_dev(kobj); | |
2389 | struct bmc_device *bmc = to_bmc_device(dev); | |
2390 | umode_t mode = attr->mode; | |
2391 | ||
2392 | if (attr == &dev_attr_aux_firmware_revision.attr) | |
2393 | return bmc->id.aux_firmware_revision_set ? mode : 0; | |
2394 | if (attr == &dev_attr_guid.attr) | |
2395 | return bmc->guid_set ? mode : 0; | |
2396 | return mode; | |
2397 | } | |
2398 | ||
16639eb0 CM |
2399 | static struct attribute_group bmc_dev_attr_group = { |
2400 | .attrs = bmc_dev_attrs, | |
2d06a0c9 | 2401 | .is_visible = bmc_dev_attr_is_visible, |
16639eb0 | 2402 | }; |
5e59393e | 2403 | |
16639eb0 CM |
2404 | static const struct attribute_group *bmc_dev_attr_groups[] = { |
2405 | &bmc_dev_attr_group, | |
2406 | NULL | |
2407 | }; | |
2408 | ||
2409 | static struct device_type bmc_device_type = { | |
2410 | .groups = bmc_dev_attr_groups, | |
2411 | }; | |
2412 | ||
2413 | static void | |
2414 | release_bmc_device(struct device *dev) | |
2415 | { | |
2416 | kfree(to_bmc_device(dev)); | |
5e59393e JG |
2417 | } |
2418 | ||
2419 | static void | |
2420 | cleanup_bmc_device(struct kref *ref) | |
2421 | { | |
16639eb0 | 2422 | struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount); |
5e59393e | 2423 | |
16639eb0 | 2424 | platform_device_unregister(&bmc->pdev); |
50c812b2 CM |
2425 | } |
2426 | ||
2427 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2428 | { | |
2429 | struct bmc_device *bmc = intf->bmc; | |
2430 | ||
5a0e10ec | 2431 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); |
50c812b2 | 2432 | if (intf->my_dev_name) { |
16639eb0 | 2433 | sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name); |
50c812b2 CM |
2434 | kfree(intf->my_dev_name); |
2435 | intf->my_dev_name = NULL; | |
2436 | } | |
2437 | ||
2438 | mutex_lock(&ipmidriver_mutex); | |
16639eb0 | 2439 | kref_put(&bmc->usecount, cleanup_bmc_device); |
f0b55da0 | 2440 | intf->bmc = NULL; |
50c812b2 CM |
2441 | mutex_unlock(&ipmidriver_mutex); |
2442 | } | |
2443 | ||
5a0e10ec | 2444 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) |
50c812b2 CM |
2445 | { |
2446 | int rv; | |
2447 | struct bmc_device *bmc = intf->bmc; | |
2448 | struct bmc_device *old_bmc; | |
50c812b2 CM |
2449 | |
2450 | mutex_lock(&ipmidriver_mutex); | |
2451 | ||
2452 | /* | |
2453 | * Try to find if there is an bmc_device struct | |
2454 | * representing the interfaced BMC already | |
2455 | */ | |
2456 | if (bmc->guid_set) | |
fe2d5ffc | 2457 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2458 | else |
fe2d5ffc | 2459 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2460 | bmc->id.product_id, |
2461 | bmc->id.device_id); | |
2462 | ||
2463 | /* | |
2464 | * If there is already an bmc_device, free the new one, | |
2465 | * otherwise register the new BMC device | |
2466 | */ | |
2467 | if (old_bmc) { | |
2468 | kfree(bmc); | |
2469 | intf->bmc = old_bmc; | |
2470 | bmc = old_bmc; | |
2471 | ||
16639eb0 | 2472 | kref_get(&bmc->usecount); |
50c812b2 CM |
2473 | mutex_unlock(&ipmidriver_mutex); |
2474 | ||
2475 | printk(KERN_INFO | |
2476 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2477 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2478 | bmc->id.manufacturer_id, | |
2479 | bmc->id.product_id, | |
2480 | bmc->id.device_id); | |
2481 | } else { | |
f0b55da0 CM |
2482 | unsigned char orig_dev_id = bmc->id.device_id; |
2483 | int warn_printed = 0; | |
2484 | ||
16639eb0 | 2485 | snprintf(bmc->name, sizeof(bmc->name), |
f0b55da0 | 2486 | "ipmi_bmc.%4.4x", bmc->id.product_id); |
16639eb0 | 2487 | bmc->pdev.name = bmc->name; |
f0b55da0 | 2488 | |
fe2d5ffc | 2489 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
f0b55da0 | 2490 | bmc->id.product_id, |
1d5636cc | 2491 | bmc->id.device_id)) { |
f0b55da0 CM |
2492 | if (!warn_printed) { |
2493 | printk(KERN_WARNING PFX | |
2494 | "This machine has two different BMCs" | |
2495 | " with the same product id and device" | |
2496 | " id. This is an error in the" | |
2497 | " firmware, but incrementing the" | |
2498 | " device id to work around the problem." | |
2499 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2500 | bmc->id.product_id, bmc->id.device_id); | |
2501 | warn_printed = 1; | |
2502 | } | |
2503 | bmc->id.device_id++; /* Wraps at 255 */ | |
2504 | if (bmc->id.device_id == orig_dev_id) { | |
2505 | printk(KERN_ERR PFX | |
2506 | "Out of device ids!\n"); | |
2507 | break; | |
2508 | } | |
2509 | } | |
2510 | ||
16639eb0 CM |
2511 | bmc->pdev.dev.driver = &ipmidriver.driver; |
2512 | bmc->pdev.id = bmc->id.device_id; | |
2513 | bmc->pdev.dev.release = release_bmc_device; | |
2514 | bmc->pdev.dev.type = &bmc_device_type; | |
5a0e10ec | 2515 | kref_init(&bmc->usecount); |
50c812b2 | 2516 | |
16639eb0 | 2517 | rv = platform_device_register(&bmc->pdev); |
50c812b2 CM |
2518 | mutex_unlock(&ipmidriver_mutex); |
2519 | if (rv) { | |
16639eb0 | 2520 | put_device(&bmc->pdev.dev); |
50c812b2 CM |
2521 | printk(KERN_ERR |
2522 | "ipmi_msghandler:" | |
2523 | " Unable to register bmc device: %d\n", | |
2524 | rv); | |
c70d7499 CM |
2525 | /* |
2526 | * Don't go to out_err, you can only do that if | |
2527 | * the device is registered already. | |
2528 | */ | |
50c812b2 CM |
2529 | return rv; |
2530 | } | |
2531 | ||
279fbd0c MS |
2532 | dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, " |
2533 | "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2534 | bmc->id.manufacturer_id, | |
2535 | bmc->id.product_id, | |
2536 | bmc->id.device_id); | |
50c812b2 CM |
2537 | } |
2538 | ||
2539 | /* | |
2540 | * create symlink from system interface device to bmc device | |
2541 | * and back. | |
2542 | */ | |
5a0e10ec | 2543 | rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc"); |
50c812b2 CM |
2544 | if (rv) { |
2545 | printk(KERN_ERR | |
2546 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2547 | rv); | |
2548 | goto out_err; | |
2549 | } | |
2550 | ||
16639eb0 | 2551 | intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", ifnum); |
50c812b2 CM |
2552 | if (!intf->my_dev_name) { |
2553 | rv = -ENOMEM; | |
2554 | printk(KERN_ERR | |
2555 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2556 | rv); | |
2557 | goto out_err; | |
2558 | } | |
50c812b2 | 2559 | |
16639eb0 | 2560 | rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj, |
50c812b2 CM |
2561 | intf->my_dev_name); |
2562 | if (rv) { | |
2563 | kfree(intf->my_dev_name); | |
2564 | intf->my_dev_name = NULL; | |
2565 | printk(KERN_ERR | |
2566 | "ipmi_msghandler:" | |
2567 | " Unable to create symlink to bmc: %d\n", | |
2568 | rv); | |
2569 | goto out_err; | |
2570 | } | |
2571 | ||
2572 | return 0; | |
2573 | ||
2574 | out_err: | |
2575 | ipmi_bmc_unregister(intf); | |
2576 | return rv; | |
2577 | } | |
2578 | ||
2579 | static int | |
2580 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2581 | { | |
2582 | struct kernel_ipmi_msg msg; | |
2583 | struct ipmi_system_interface_addr si; | |
2584 | ||
2585 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2586 | si.channel = IPMI_BMC_CHANNEL; | |
2587 | si.lun = 0; | |
2588 | ||
2589 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2590 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2591 | msg.data = NULL; | |
2592 | msg.data_len = 0; | |
2593 | return i_ipmi_request(NULL, | |
2594 | intf, | |
2595 | (struct ipmi_addr *) &si, | |
2596 | 0, | |
2597 | &msg, | |
2598 | intf, | |
2599 | NULL, | |
2600 | NULL, | |
2601 | 0, | |
2602 | intf->channels[0].address, | |
2603 | intf->channels[0].lun, | |
2604 | -1, 0); | |
2605 | } | |
2606 | ||
2607 | static void | |
2608 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2609 | { | |
2610 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2611 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2612 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2613 | /* Not for me */ | |
2614 | return; | |
2615 | ||
2616 | if (msg->msg.data[0] != 0) { | |
2617 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2618 | intf->bmc->guid_set = 0; | |
2619 | goto out; | |
2620 | } | |
2621 | ||
2622 | if (msg->msg.data_len < 17) { | |
2623 | intf->bmc->guid_set = 0; | |
2624 | printk(KERN_WARNING PFX | |
2625 | "guid_handler: The GUID response from the BMC was too" | |
2626 | " short, it was %d but should have been 17. Assuming" | |
2627 | " GUID is not available.\n", | |
2628 | msg->msg.data_len); | |
2629 | goto out; | |
2630 | } | |
2631 | ||
2632 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2633 | intf->bmc->guid_set = 1; | |
2634 | out: | |
2635 | wake_up(&intf->waitq); | |
2636 | } | |
2637 | ||
2638 | static void | |
2639 | get_guid(ipmi_smi_t intf) | |
2640 | { | |
2641 | int rv; | |
2642 | ||
2643 | intf->bmc->guid_set = 0x2; | |
2644 | intf->null_user_handler = guid_handler; | |
2645 | rv = send_guid_cmd(intf, 0); | |
2646 | if (rv) | |
2647 | /* Send failed, no GUID available. */ | |
2648 | intf->bmc->guid_set = 0; | |
2649 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2650 | intf->null_user_handler = NULL; | |
2651 | } | |
2652 | ||
1da177e4 LT |
2653 | static int |
2654 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2655 | { | |
2656 | struct kernel_ipmi_msg msg; | |
2657 | unsigned char data[1]; | |
2658 | struct ipmi_system_interface_addr si; | |
2659 | ||
2660 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2661 | si.channel = IPMI_BMC_CHANNEL; | |
2662 | si.lun = 0; | |
2663 | ||
2664 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2665 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2666 | msg.data = data; | |
2667 | msg.data_len = 1; | |
2668 | data[0] = chan; | |
2669 | return i_ipmi_request(NULL, | |
2670 | intf, | |
2671 | (struct ipmi_addr *) &si, | |
2672 | 0, | |
2673 | &msg, | |
56a55ec6 | 2674 | intf, |
1da177e4 LT |
2675 | NULL, |
2676 | NULL, | |
2677 | 0, | |
c14979b9 CM |
2678 | intf->channels[0].address, |
2679 | intf->channels[0].lun, | |
1da177e4 LT |
2680 | -1, 0); |
2681 | } | |
2682 | ||
2683 | static void | |
56a55ec6 | 2684 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2685 | { |
2686 | int rv = 0; | |
2687 | int chan; | |
2688 | ||
56a55ec6 CM |
2689 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2690 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2691 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2692 | /* It's the one we want */ |
56a55ec6 | 2693 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2694 | /* Got an error from the channel, just go on. */ |
2695 | ||
56a55ec6 | 2696 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2697 | /* |
2698 | * If the MC does not support this | |
2699 | * command, that is legal. We just | |
2700 | * assume it has one IPMB at channel | |
2701 | * zero. | |
2702 | */ | |
1da177e4 LT |
2703 | intf->channels[0].medium |
2704 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2705 | intf->channels[0].protocol | |
2706 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2707 | |
2708 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2709 | wake_up(&intf->waitq); | |
2710 | goto out; | |
2711 | } | |
2712 | goto next_channel; | |
2713 | } | |
56a55ec6 | 2714 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2715 | /* Message not big enough, just go on. */ |
2716 | goto next_channel; | |
2717 | } | |
2718 | chan = intf->curr_channel; | |
56a55ec6 CM |
2719 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2720 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2721 | |
c70d7499 | 2722 | next_channel: |
1da177e4 LT |
2723 | intf->curr_channel++; |
2724 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2725 | wake_up(&intf->waitq); | |
2726 | else | |
2727 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2728 | ||
2729 | if (rv) { | |
2730 | /* Got an error somehow, just give up. */ | |
1f668423 CM |
2731 | printk(KERN_WARNING PFX |
2732 | "Error sending channel information for channel" | |
2733 | " %d: %d\n", intf->curr_channel, rv); | |
2734 | ||
1da177e4 LT |
2735 | intf->curr_channel = IPMI_MAX_CHANNELS; |
2736 | wake_up(&intf->waitq); | |
1da177e4 LT |
2737 | } |
2738 | } | |
2739 | out: | |
2740 | return; | |
2741 | } | |
2742 | ||
895dcfd1 | 2743 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 2744 | { |
fcfa4724 CM |
2745 | if (intf->handlers->poll) |
2746 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
2747 | /* In case something came in */ |
2748 | handle_new_recv_msgs(intf); | |
fcfa4724 | 2749 | } |
895dcfd1 CM |
2750 | |
2751 | void ipmi_poll_interface(ipmi_user_t user) | |
2752 | { | |
2753 | ipmi_poll(user->intf); | |
fcfa4724 | 2754 | } |
c70d7499 | 2755 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2756 | |
81d02b7f | 2757 | int ipmi_register_smi(const struct ipmi_smi_handlers *handlers, |
1da177e4 | 2758 | void *send_info, |
50c812b2 CM |
2759 | struct ipmi_device_id *device_id, |
2760 | struct device *si_dev, | |
453823ba | 2761 | unsigned char slave_addr) |
1da177e4 LT |
2762 | { |
2763 | int i, j; | |
2764 | int rv; | |
393d2cc3 | 2765 | ipmi_smi_t intf; |
bca0324d | 2766 | ipmi_smi_t tintf; |
bca0324d | 2767 | struct list_head *link; |
1da177e4 | 2768 | |
c70d7499 CM |
2769 | /* |
2770 | * Make sure the driver is actually initialized, this handles | |
2771 | * problems with initialization order. | |
2772 | */ | |
1da177e4 LT |
2773 | if (!initialized) { |
2774 | rv = ipmi_init_msghandler(); | |
2775 | if (rv) | |
2776 | return rv; | |
c70d7499 CM |
2777 | /* |
2778 | * The init code doesn't return an error if it was turned | |
2779 | * off, but it won't initialize. Check that. | |
2780 | */ | |
1da177e4 LT |
2781 | if (!initialized) |
2782 | return -ENODEV; | |
2783 | } | |
2784 | ||
dd00cc48 | 2785 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2786 | if (!intf) |
1da177e4 | 2787 | return -ENOMEM; |
b2c03941 CM |
2788 | |
2789 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2790 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2791 | ||
50c812b2 CM |
2792 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2793 | if (!intf->bmc) { | |
2794 | kfree(intf); | |
2795 | return -ENOMEM; | |
2796 | } | |
bca0324d | 2797 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2798 | kref_init(&intf->refcount); |
50c812b2 CM |
2799 | intf->bmc->id = *device_id; |
2800 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2801 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2802 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2803 | intf->channels[j].lun = 2; | |
2804 | } | |
2805 | if (slave_addr != 0) | |
2806 | intf->channels[0].address = slave_addr; | |
2807 | INIT_LIST_HEAD(&intf->users); | |
2808 | intf->handlers = handlers; | |
2809 | intf->send_info = send_info; | |
2810 | spin_lock_init(&intf->seq_lock); | |
2811 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2812 | intf->seq_table[j].inuse = 0; | |
2813 | intf->seq_table[j].seqid = 0; | |
2814 | } | |
2815 | intf->curr_seq = 0; | |
2816 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2817 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 | 2818 | #endif |
65be7544 CM |
2819 | spin_lock_init(&intf->waiting_rcv_msgs_lock); |
2820 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
7adf579c CM |
2821 | tasklet_init(&intf->recv_tasklet, |
2822 | smi_recv_tasklet, | |
2823 | (unsigned long) intf); | |
2824 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
7ea0ed2b CM |
2825 | spin_lock_init(&intf->xmit_msgs_lock); |
2826 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
2827 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
393d2cc3 | 2828 | spin_lock_init(&intf->events_lock); |
89986496 CM |
2829 | atomic_set(&intf->event_waiters, 0); |
2830 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
2831 | INIT_LIST_HEAD(&intf->waiting_events); |
2832 | intf->waiting_events_count = 0; | |
d6dfd131 | 2833 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2834 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2835 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2836 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2837 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2838 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2839 | |
393d2cc3 | 2840 | intf->proc_dir = NULL; |
1da177e4 | 2841 | |
b2c03941 | 2842 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2843 | mutex_lock(&ipmi_interfaces_mutex); |
2844 | /* Look for a hole in the numbers. */ | |
2845 | i = 0; | |
2846 | link = &ipmi_interfaces; | |
2847 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2848 | if (tintf->intf_num != i) { | |
2849 | link = &tintf->link; | |
1da177e4 LT |
2850 | break; |
2851 | } | |
bca0324d | 2852 | i++; |
1da177e4 | 2853 | } |
bca0324d CM |
2854 | /* Add the new interface in numeric order. */ |
2855 | if (i == 0) | |
2856 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2857 | else | |
2858 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2859 | |
453823ba CM |
2860 | rv = handlers->start_processing(send_info, intf); |
2861 | if (rv) | |
2862 | goto out; | |
1da177e4 | 2863 | |
50c812b2 CM |
2864 | get_guid(intf); |
2865 | ||
b2c03941 | 2866 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2867 | || ((intf->ipmi_version_major == 1) |
2868 | && (intf->ipmi_version_minor >= 5))) { | |
2869 | /* | |
2870 | * Start scanning the channels to see what is | |
2871 | * available. | |
2872 | */ | |
393d2cc3 CM |
2873 | intf->null_user_handler = channel_handler; |
2874 | intf->curr_channel = 0; | |
2875 | rv = send_channel_info_cmd(intf, 0); | |
1f668423 CM |
2876 | if (rv) { |
2877 | printk(KERN_WARNING PFX | |
2878 | "Error sending channel information for channel" | |
2879 | " 0, %d\n", rv); | |
393d2cc3 | 2880 | goto out; |
1f668423 | 2881 | } |
1da177e4 | 2882 | |
393d2cc3 CM |
2883 | /* Wait for the channel info to be read. */ |
2884 | wait_event(intf->waitq, | |
2885 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2886 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2887 | } else { |
2888 | /* Assume a single IPMB channel at zero. */ | |
2889 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2890 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
9a2845c4 | 2891 | intf->curr_channel = IPMI_MAX_CHANNELS; |
1da177e4 LT |
2892 | } |
2893 | ||
bd85f4b3 XX |
2894 | rv = ipmi_bmc_register(intf, i); |
2895 | ||
393d2cc3 CM |
2896 | if (rv == 0) |
2897 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2898 | |
393d2cc3 | 2899 | out: |
1da177e4 | 2900 | if (rv) { |
393d2cc3 CM |
2901 | if (intf->proc_dir) |
2902 | remove_proc_entries(intf); | |
b2c03941 | 2903 | intf->handlers = NULL; |
bca0324d CM |
2904 | list_del_rcu(&intf->link); |
2905 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2906 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2907 | synchronize_rcu(); |
393d2cc3 | 2908 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2909 | } else { |
78ba2faf CM |
2910 | /* |
2911 | * Keep memory order straight for RCU readers. Make | |
2912 | * sure everything else is committed to memory before | |
2913 | * setting intf_num to mark the interface valid. | |
2914 | */ | |
2915 | smp_wmb(); | |
bca0324d CM |
2916 | intf->intf_num = i; |
2917 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 2918 | /* After this point the interface is legal to use. */ |
50c812b2 | 2919 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 2920 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
2921 | } |
2922 | ||
2923 | return rv; | |
2924 | } | |
c70d7499 | 2925 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 2926 | |
7ea0ed2b CM |
2927 | static void deliver_smi_err_response(ipmi_smi_t intf, |
2928 | struct ipmi_smi_msg *msg, | |
2929 | unsigned char err) | |
2930 | { | |
2931 | msg->rsp[0] = msg->data[0] | 4; | |
2932 | msg->rsp[1] = msg->data[1]; | |
2933 | msg->rsp[2] = err; | |
2934 | msg->rsp_size = 3; | |
2935 | /* It's an error, so it will never requeue, no need to check return. */ | |
2936 | handle_one_recv_msg(intf, msg); | |
2937 | } | |
2938 | ||
b2c03941 CM |
2939 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
2940 | { | |
2941 | int i; | |
2942 | struct seq_table *ent; | |
7ea0ed2b CM |
2943 | struct ipmi_smi_msg *msg; |
2944 | struct list_head *entry; | |
2945 | struct list_head tmplist; | |
2946 | ||
2947 | /* Clear out our transmit queues and hold the messages. */ | |
2948 | INIT_LIST_HEAD(&tmplist); | |
2949 | list_splice_tail(&intf->hp_xmit_msgs, &tmplist); | |
2950 | list_splice_tail(&intf->xmit_msgs, &tmplist); | |
2951 | ||
2952 | /* Current message first, to preserve order */ | |
2953 | while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) { | |
2954 | /* Wait for the message to clear out. */ | |
2955 | schedule_timeout(1); | |
2956 | } | |
b2c03941 CM |
2957 | |
2958 | /* No need for locks, the interface is down. */ | |
7ea0ed2b CM |
2959 | |
2960 | /* | |
2961 | * Return errors for all pending messages in queue and in the | |
2962 | * tables waiting for remote responses. | |
2963 | */ | |
2964 | while (!list_empty(&tmplist)) { | |
2965 | entry = tmplist.next; | |
2966 | list_del(entry); | |
2967 | msg = list_entry(entry, struct ipmi_smi_msg, link); | |
2968 | deliver_smi_err_response(intf, msg, IPMI_ERR_UNSPECIFIED); | |
2969 | } | |
2970 | ||
b2c03941 CM |
2971 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
2972 | ent = &(intf->seq_table[i]); | |
2973 | if (!ent->inuse) | |
2974 | continue; | |
2975 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
2976 | } | |
2977 | } | |
2978 | ||
1da177e4 LT |
2979 | int ipmi_unregister_smi(ipmi_smi_t intf) |
2980 | { | |
1da177e4 | 2981 | struct ipmi_smi_watcher *w; |
7ea0ed2b CM |
2982 | int intf_num = intf->intf_num; |
2983 | ipmi_user_t user; | |
1da177e4 | 2984 | |
b2c03941 | 2985 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 2986 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 | 2987 | intf->intf_num = -1; |
7ea0ed2b | 2988 | intf->in_shutdown = true; |
bca0324d CM |
2989 | list_del_rcu(&intf->link); |
2990 | mutex_unlock(&ipmi_interfaces_mutex); | |
2991 | synchronize_rcu(); | |
1da177e4 | 2992 | |
b2c03941 CM |
2993 | cleanup_smi_msgs(intf); |
2994 | ||
7ea0ed2b CM |
2995 | /* Clean up the effects of users on the lower-level software. */ |
2996 | mutex_lock(&ipmi_interfaces_mutex); | |
2997 | rcu_read_lock(); | |
2998 | list_for_each_entry_rcu(user, &intf->users, link) { | |
2999 | module_put(intf->handlers->owner); | |
3000 | if (intf->handlers->dec_usecount) | |
3001 | intf->handlers->dec_usecount(intf->send_info); | |
3002 | } | |
3003 | rcu_read_unlock(); | |
3004 | intf->handlers = NULL; | |
3005 | mutex_unlock(&ipmi_interfaces_mutex); | |
3006 | ||
393d2cc3 | 3007 | remove_proc_entries(intf); |
bd85f4b3 | 3008 | ipmi_bmc_unregister(intf); |
1da177e4 | 3009 | |
c70d7499 CM |
3010 | /* |
3011 | * Call all the watcher interfaces to tell them that | |
3012 | * an interface is gone. | |
3013 | */ | |
393d2cc3 | 3014 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3015 | w->smi_gone(intf_num); |
3016 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3017 | |
393d2cc3 | 3018 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3019 | return 0; |
3020 | } | |
c70d7499 | 3021 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3022 | |
3023 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3024 | struct ipmi_smi_msg *msg) | |
3025 | { | |
3026 | struct ipmi_ipmb_addr ipmb_addr; | |
3027 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3028 | |
c70d7499 CM |
3029 | /* |
3030 | * This is 11, not 10, because the response must contain a | |
3031 | * completion code. | |
3032 | */ | |
1da177e4 LT |
3033 | if (msg->rsp_size < 11) { |
3034 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3035 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3036 | return 0; |
3037 | } | |
3038 | ||
3039 | if (msg->rsp[2] != 0) { | |
3040 | /* An error getting the response, just ignore it. */ | |
3041 | return 0; | |
3042 | } | |
3043 | ||
3044 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3045 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3046 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3047 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3048 | ||
c70d7499 CM |
3049 | /* |
3050 | * It's a response from a remote entity. Look up the sequence | |
3051 | * number and handle the response. | |
3052 | */ | |
1da177e4 LT |
3053 | if (intf_find_seq(intf, |
3054 | msg->rsp[7] >> 2, | |
3055 | msg->rsp[3] & 0x0f, | |
3056 | msg->rsp[8], | |
3057 | (msg->rsp[4] >> 2) & (~1), | |
3058 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3059 | &recv_msg)) { |
3060 | /* | |
3061 | * We were unable to find the sequence number, | |
3062 | * so just nuke the message. | |
3063 | */ | |
b2655f26 | 3064 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3065 | return 0; |
3066 | } | |
3067 | ||
3068 | memcpy(recv_msg->msg_data, | |
3069 | &(msg->rsp[9]), | |
3070 | msg->rsp_size - 9); | |
c70d7499 CM |
3071 | /* |
3072 | * The other fields matched, so no need to set them, except | |
3073 | * for netfn, which needs to be the response that was | |
3074 | * returned, not the request value. | |
3075 | */ | |
1da177e4 LT |
3076 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3077 | recv_msg->msg.data = recv_msg->msg_data; | |
3078 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3079 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3080 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3081 | deliver_response(recv_msg); |
3082 | ||
3083 | return 0; | |
3084 | } | |
3085 | ||
3086 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3087 | struct ipmi_smi_msg *msg) | |
3088 | { | |
393d2cc3 CM |
3089 | struct cmd_rcvr *rcvr; |
3090 | int rv = 0; | |
3091 | unsigned char netfn; | |
3092 | unsigned char cmd; | |
c69c3127 | 3093 | unsigned char chan; |
393d2cc3 CM |
3094 | ipmi_user_t user = NULL; |
3095 | struct ipmi_ipmb_addr *ipmb_addr; | |
3096 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3097 | |
3098 | if (msg->rsp_size < 10) { | |
3099 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3100 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3101 | return 0; |
3102 | } | |
3103 | ||
3104 | if (msg->rsp[2] != 0) { | |
3105 | /* An error getting the response, just ignore it. */ | |
3106 | return 0; | |
3107 | } | |
3108 | ||
3109 | netfn = msg->rsp[4] >> 2; | |
3110 | cmd = msg->rsp[8]; | |
c69c3127 | 3111 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3112 | |
e61fb5b6 | 3113 | rcu_read_lock(); |
c69c3127 | 3114 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3115 | if (rcvr) { |
3116 | user = rcvr->user; | |
3117 | kref_get(&user->refcount); | |
3118 | } else | |
3119 | user = NULL; | |
e61fb5b6 | 3120 | rcu_read_unlock(); |
1da177e4 LT |
3121 | |
3122 | if (user == NULL) { | |
3123 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3124 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3125 | |
3126 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3127 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3128 | msg->data[2] = msg->rsp[3]; | |
3129 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3130 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3131 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3132 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3133 | /* rqseq/lun */ |
3134 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3135 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3136 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3137 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3138 | msg->data_size = 11; | |
3139 | ||
3140 | #ifdef DEBUG_MSGING | |
3141 | { | |
3142 | int m; | |
3143 | printk("Invalid command:"); | |
e8b33617 | 3144 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3145 | printk(" %2.2x", msg->data[m]); |
3146 | printk("\n"); | |
3147 | } | |
3148 | #endif | |
b2c03941 | 3149 | rcu_read_lock(); |
7ea0ed2b CM |
3150 | if (!intf->in_shutdown) { |
3151 | smi_send(intf, intf->handlers, msg, 0); | |
c70d7499 CM |
3152 | /* |
3153 | * We used the message, so return the value | |
3154 | * that causes it to not be freed or | |
3155 | * queued. | |
3156 | */ | |
b2c03941 CM |
3157 | rv = -1; |
3158 | } | |
3159 | rcu_read_unlock(); | |
1da177e4 LT |
3160 | } else { |
3161 | /* Deliver the message to the user. */ | |
b2655f26 | 3162 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3163 | |
3164 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3165 | if (!recv_msg) { |
c70d7499 CM |
3166 | /* |
3167 | * We couldn't allocate memory for the | |
3168 | * message, so requeue it for handling | |
3169 | * later. | |
3170 | */ | |
1da177e4 | 3171 | rv = 1; |
393d2cc3 | 3172 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3173 | } else { |
3174 | /* Extract the source address from the data. */ | |
3175 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3176 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3177 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3178 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3179 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3180 | ||
c70d7499 CM |
3181 | /* |
3182 | * Extract the rest of the message information | |
3183 | * from the IPMB header. | |
3184 | */ | |
1da177e4 LT |
3185 | recv_msg->user = user; |
3186 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3187 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3188 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3189 | recv_msg->msg.cmd = msg->rsp[8]; | |
3190 | recv_msg->msg.data = recv_msg->msg_data; | |
3191 | ||
c70d7499 CM |
3192 | /* |
3193 | * We chop off 10, not 9 bytes because the checksum | |
3194 | * at the end also needs to be removed. | |
3195 | */ | |
1da177e4 LT |
3196 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3197 | memcpy(recv_msg->msg_data, | |
3198 | &(msg->rsp[9]), | |
3199 | msg->rsp_size - 10); | |
3200 | deliver_response(recv_msg); | |
3201 | } | |
3202 | } | |
3203 | ||
3204 | return rv; | |
3205 | } | |
3206 | ||
3207 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3208 | struct ipmi_smi_msg *msg) | |
3209 | { | |
3210 | struct ipmi_lan_addr lan_addr; | |
3211 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3212 | |
3213 | ||
c70d7499 CM |
3214 | /* |
3215 | * This is 13, not 12, because the response must contain a | |
3216 | * completion code. | |
3217 | */ | |
1da177e4 LT |
3218 | if (msg->rsp_size < 13) { |
3219 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3220 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3221 | return 0; |
3222 | } | |
3223 | ||
3224 | if (msg->rsp[2] != 0) { | |
3225 | /* An error getting the response, just ignore it. */ | |
3226 | return 0; | |
3227 | } | |
3228 | ||
3229 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3230 | lan_addr.session_handle = msg->rsp[4]; | |
3231 | lan_addr.remote_SWID = msg->rsp[8]; | |
3232 | lan_addr.local_SWID = msg->rsp[5]; | |
3233 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3234 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3235 | lan_addr.lun = msg->rsp[9] & 3; | |
3236 | ||
c70d7499 CM |
3237 | /* |
3238 | * It's a response from a remote entity. Look up the sequence | |
3239 | * number and handle the response. | |
3240 | */ | |
1da177e4 LT |
3241 | if (intf_find_seq(intf, |
3242 | msg->rsp[9] >> 2, | |
3243 | msg->rsp[3] & 0x0f, | |
3244 | msg->rsp[10], | |
3245 | (msg->rsp[6] >> 2) & (~1), | |
3246 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3247 | &recv_msg)) { |
3248 | /* | |
3249 | * We were unable to find the sequence number, | |
3250 | * so just nuke the message. | |
3251 | */ | |
b2655f26 | 3252 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3253 | return 0; |
3254 | } | |
3255 | ||
3256 | memcpy(recv_msg->msg_data, | |
3257 | &(msg->rsp[11]), | |
3258 | msg->rsp_size - 11); | |
c70d7499 CM |
3259 | /* |
3260 | * The other fields matched, so no need to set them, except | |
3261 | * for netfn, which needs to be the response that was | |
3262 | * returned, not the request value. | |
3263 | */ | |
1da177e4 LT |
3264 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3265 | recv_msg->msg.data = recv_msg->msg_data; | |
3266 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3267 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3268 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3269 | deliver_response(recv_msg); |
3270 | ||
3271 | return 0; | |
3272 | } | |
3273 | ||
3274 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3275 | struct ipmi_smi_msg *msg) | |
3276 | { | |
393d2cc3 CM |
3277 | struct cmd_rcvr *rcvr; |
3278 | int rv = 0; | |
3279 | unsigned char netfn; | |
3280 | unsigned char cmd; | |
c69c3127 | 3281 | unsigned char chan; |
393d2cc3 CM |
3282 | ipmi_user_t user = NULL; |
3283 | struct ipmi_lan_addr *lan_addr; | |
3284 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3285 | |
3286 | if (msg->rsp_size < 12) { | |
3287 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3288 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3289 | return 0; |
3290 | } | |
3291 | ||
3292 | if (msg->rsp[2] != 0) { | |
3293 | /* An error getting the response, just ignore it. */ | |
3294 | return 0; | |
3295 | } | |
3296 | ||
3297 | netfn = msg->rsp[6] >> 2; | |
3298 | cmd = msg->rsp[10]; | |
c69c3127 | 3299 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3300 | |
e61fb5b6 | 3301 | rcu_read_lock(); |
c69c3127 | 3302 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3303 | if (rcvr) { |
3304 | user = rcvr->user; | |
3305 | kref_get(&user->refcount); | |
3306 | } else | |
3307 | user = NULL; | |
e61fb5b6 | 3308 | rcu_read_unlock(); |
1da177e4 LT |
3309 | |
3310 | if (user == NULL) { | |
393d2cc3 | 3311 | /* We didn't find a user, just give up. */ |
b2655f26 | 3312 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3313 | |
c70d7499 CM |
3314 | /* |
3315 | * Don't do anything with these messages, just allow | |
3316 | * them to be freed. | |
3317 | */ | |
3318 | rv = 0; | |
1da177e4 LT |
3319 | } else { |
3320 | /* Deliver the message to the user. */ | |
b2655f26 | 3321 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3322 | |
3323 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3324 | if (!recv_msg) { |
c70d7499 CM |
3325 | /* |
3326 | * We couldn't allocate memory for the | |
3327 | * message, so requeue it for handling later. | |
3328 | */ | |
1da177e4 | 3329 | rv = 1; |
393d2cc3 | 3330 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3331 | } else { |
3332 | /* Extract the source address from the data. */ | |
3333 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3334 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3335 | lan_addr->session_handle = msg->rsp[4]; | |
3336 | lan_addr->remote_SWID = msg->rsp[8]; | |
3337 | lan_addr->local_SWID = msg->rsp[5]; | |
3338 | lan_addr->lun = msg->rsp[9] & 3; | |
3339 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3340 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3341 | ||
c70d7499 CM |
3342 | /* |
3343 | * Extract the rest of the message information | |
3344 | * from the IPMB header. | |
3345 | */ | |
1da177e4 LT |
3346 | recv_msg->user = user; |
3347 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3348 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3349 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3350 | recv_msg->msg.cmd = msg->rsp[10]; | |
3351 | recv_msg->msg.data = recv_msg->msg_data; | |
3352 | ||
c70d7499 CM |
3353 | /* |
3354 | * We chop off 12, not 11 bytes because the checksum | |
3355 | * at the end also needs to be removed. | |
3356 | */ | |
1da177e4 LT |
3357 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3358 | memcpy(recv_msg->msg_data, | |
3359 | &(msg->rsp[11]), | |
3360 | msg->rsp_size - 12); | |
3361 | deliver_response(recv_msg); | |
3362 | } | |
3363 | } | |
3364 | ||
3365 | return rv; | |
3366 | } | |
3367 | ||
4dec302f | 3368 | /* |
3369 | * This routine will handle "Get Message" command responses with | |
3370 | * channels that use an OEM Medium. The message format belongs to | |
3371 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3372 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3373 | */ | |
3374 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3375 | struct ipmi_smi_msg *msg) | |
3376 | { | |
3377 | struct cmd_rcvr *rcvr; | |
3378 | int rv = 0; | |
3379 | unsigned char netfn; | |
3380 | unsigned char cmd; | |
3381 | unsigned char chan; | |
3382 | ipmi_user_t user = NULL; | |
3383 | struct ipmi_system_interface_addr *smi_addr; | |
3384 | struct ipmi_recv_msg *recv_msg; | |
3385 | ||
3386 | /* | |
3387 | * We expect the OEM SW to perform error checking | |
3388 | * so we just do some basic sanity checks | |
3389 | */ | |
3390 | if (msg->rsp_size < 4) { | |
3391 | /* Message not big enough, just ignore it. */ | |
3392 | ipmi_inc_stat(intf, invalid_commands); | |
3393 | return 0; | |
3394 | } | |
3395 | ||
3396 | if (msg->rsp[2] != 0) { | |
3397 | /* An error getting the response, just ignore it. */ | |
3398 | return 0; | |
3399 | } | |
3400 | ||
3401 | /* | |
3402 | * This is an OEM Message so the OEM needs to know how | |
3403 | * handle the message. We do no interpretation. | |
3404 | */ | |
3405 | netfn = msg->rsp[0] >> 2; | |
3406 | cmd = msg->rsp[1]; | |
3407 | chan = msg->rsp[3] & 0xf; | |
3408 | ||
3409 | rcu_read_lock(); | |
3410 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3411 | if (rcvr) { | |
3412 | user = rcvr->user; | |
3413 | kref_get(&user->refcount); | |
3414 | } else | |
3415 | user = NULL; | |
3416 | rcu_read_unlock(); | |
3417 | ||
3418 | if (user == NULL) { | |
3419 | /* We didn't find a user, just give up. */ | |
3420 | ipmi_inc_stat(intf, unhandled_commands); | |
3421 | ||
3422 | /* | |
3423 | * Don't do anything with these messages, just allow | |
3424 | * them to be freed. | |
3425 | */ | |
3426 | ||
3427 | rv = 0; | |
3428 | } else { | |
3429 | /* Deliver the message to the user. */ | |
3430 | ipmi_inc_stat(intf, handled_commands); | |
3431 | ||
3432 | recv_msg = ipmi_alloc_recv_msg(); | |
3433 | if (!recv_msg) { | |
3434 | /* | |
3435 | * We couldn't allocate memory for the | |
3436 | * message, so requeue it for handling | |
3437 | * later. | |
3438 | */ | |
3439 | rv = 1; | |
3440 | kref_put(&user->refcount, free_user); | |
3441 | } else { | |
3442 | /* | |
3443 | * OEM Messages are expected to be delivered via | |
3444 | * the system interface to SMS software. We might | |
3445 | * need to visit this again depending on OEM | |
3446 | * requirements | |
3447 | */ | |
3448 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3449 | &(recv_msg->addr)); | |
3450 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3451 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3452 | smi_addr->lun = msg->rsp[0] & 3; | |
3453 | ||
3454 | recv_msg->user = user; | |
3455 | recv_msg->user_msg_data = NULL; | |
3456 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
3457 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3458 | recv_msg->msg.cmd = msg->rsp[1]; | |
3459 | recv_msg->msg.data = recv_msg->msg_data; | |
3460 | ||
3461 | /* | |
3462 | * The message starts at byte 4 which follows the | |
3463 | * the Channel Byte in the "GET MESSAGE" command | |
3464 | */ | |
3465 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
3466 | memcpy(recv_msg->msg_data, | |
3467 | &(msg->rsp[4]), | |
3468 | msg->rsp_size - 4); | |
3469 | deliver_response(recv_msg); | |
3470 | } | |
3471 | } | |
3472 | ||
3473 | return rv; | |
3474 | } | |
3475 | ||
1da177e4 LT |
3476 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
3477 | struct ipmi_smi_msg *msg) | |
3478 | { | |
3479 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3480 | |
1da177e4 LT |
3481 | recv_msg->msgid = 0; |
3482 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3483 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3484 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3485 | smi_addr->lun = msg->rsp[0] & 3; | |
3486 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3487 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3488 | recv_msg->msg.cmd = msg->rsp[1]; | |
3489 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3490 | recv_msg->msg.data = recv_msg->msg_data; | |
3491 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3492 | } | |
3493 | ||
1da177e4 LT |
3494 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3495 | struct ipmi_smi_msg *msg) | |
3496 | { | |
3497 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3498 | struct list_head msgs; | |
3499 | ipmi_user_t user; | |
3500 | int rv = 0; | |
3501 | int deliver_count = 0; | |
3502 | unsigned long flags; | |
3503 | ||
3504 | if (msg->rsp_size < 19) { | |
3505 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3506 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3507 | return 0; |
3508 | } | |
3509 | ||
3510 | if (msg->rsp[2] != 0) { | |
3511 | /* An error getting the event, just ignore it. */ | |
3512 | return 0; | |
3513 | } | |
3514 | ||
3515 | INIT_LIST_HEAD(&msgs); | |
3516 | ||
393d2cc3 | 3517 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3518 | |
b2655f26 | 3519 | ipmi_inc_stat(intf, events); |
1da177e4 | 3520 | |
c70d7499 CM |
3521 | /* |
3522 | * Allocate and fill in one message for every user that is | |
3523 | * getting events. | |
3524 | */ | |
393d2cc3 CM |
3525 | rcu_read_lock(); |
3526 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3527 | if (!user->gets_events) |
1da177e4 LT |
3528 | continue; |
3529 | ||
3530 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3531 | if (!recv_msg) { |
393d2cc3 | 3532 | rcu_read_unlock(); |
8a3628d5 CM |
3533 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3534 | link) { | |
1da177e4 LT |
3535 | list_del(&recv_msg->link); |
3536 | ipmi_free_recv_msg(recv_msg); | |
3537 | } | |
c70d7499 CM |
3538 | /* |
3539 | * We couldn't allocate memory for the | |
3540 | * message, so requeue it for handling | |
3541 | * later. | |
3542 | */ | |
1da177e4 LT |
3543 | rv = 1; |
3544 | goto out; | |
3545 | } | |
3546 | ||
3547 | deliver_count++; | |
3548 | ||
3549 | copy_event_into_recv_msg(recv_msg, msg); | |
3550 | recv_msg->user = user; | |
393d2cc3 | 3551 | kref_get(&user->refcount); |
1da177e4 LT |
3552 | list_add_tail(&(recv_msg->link), &msgs); |
3553 | } | |
393d2cc3 | 3554 | rcu_read_unlock(); |
1da177e4 LT |
3555 | |
3556 | if (deliver_count) { | |
3557 | /* Now deliver all the messages. */ | |
3558 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3559 | list_del(&recv_msg->link); | |
3560 | deliver_response(recv_msg); | |
3561 | } | |
3562 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3563 | /* |
3564 | * No one to receive the message, put it in queue if there's | |
3565 | * not already too many things in the queue. | |
3566 | */ | |
1da177e4 | 3567 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3568 | if (!recv_msg) { |
c70d7499 CM |
3569 | /* |
3570 | * We couldn't allocate memory for the | |
3571 | * message, so requeue it for handling | |
3572 | * later. | |
3573 | */ | |
1da177e4 LT |
3574 | rv = 1; |
3575 | goto out; | |
3576 | } | |
3577 | ||
3578 | copy_event_into_recv_msg(recv_msg, msg); | |
3579 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3580 | intf->waiting_events_count++; |
87ebd06f | 3581 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3582 | /* |
3583 | * There's too many things in the queue, discard this | |
3584 | * message. | |
3585 | */ | |
87ebd06f CM |
3586 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3587 | " incoming events\n"); | |
3588 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3589 | } |
3590 | ||
3591 | out: | |
3592 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3593 | ||
3594 | return rv; | |
3595 | } | |
3596 | ||
3597 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3598 | struct ipmi_smi_msg *msg) | |
3599 | { | |
3600 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3601 | struct ipmi_user *user; |
1da177e4 LT |
3602 | |
3603 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3604 | if (recv_msg == NULL) { |
3605 | printk(KERN_WARNING | |
3606 | "IPMI message received with no owner. This\n" | |
3607 | "could be because of a malformed message, or\n" | |
3608 | "because of a hardware error. Contact your\n" | |
3609 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3610 | return 0; |
3611 | } | |
1da177e4 | 3612 | |
393d2cc3 | 3613 | user = recv_msg->user; |
1da177e4 | 3614 | /* Make sure the user still exists. */ |
393d2cc3 | 3615 | if (user && !user->valid) { |
56a55ec6 | 3616 | /* The user for the message went away, so give up. */ |
b2655f26 | 3617 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3618 | ipmi_free_recv_msg(recv_msg); |
3619 | } else { | |
3620 | struct ipmi_system_interface_addr *smi_addr; | |
3621 | ||
b2655f26 | 3622 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3623 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3624 | recv_msg->msgid = msg->msgid; | |
3625 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3626 | &(recv_msg->addr)); | |
3627 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3628 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3629 | smi_addr->lun = msg->rsp[0] & 3; | |
3630 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3631 | recv_msg->msg.cmd = msg->rsp[1]; | |
3632 | memcpy(recv_msg->msg_data, | |
3633 | &(msg->rsp[2]), | |
3634 | msg->rsp_size - 2); | |
3635 | recv_msg->msg.data = recv_msg->msg_data; | |
3636 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3637 | deliver_response(recv_msg); | |
3638 | } | |
3639 | ||
3640 | return 0; | |
3641 | } | |
3642 | ||
c70d7499 | 3643 | /* |
7adf579c | 3644 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
3645 | * 0 if the message should be freed, or -1 if the message should not |
3646 | * be freed or requeued. | |
3647 | */ | |
7adf579c | 3648 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
3649 | struct ipmi_smi_msg *msg) |
3650 | { | |
3651 | int requeue; | |
3652 | int chan; | |
3653 | ||
3654 | #ifdef DEBUG_MSGING | |
3655 | int m; | |
3656 | printk("Recv:"); | |
e8b33617 | 3657 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3658 | printk(" %2.2x", msg->rsp[m]); |
3659 | printk("\n"); | |
3660 | #endif | |
3661 | if (msg->rsp_size < 2) { | |
3662 | /* Message is too small to be correct. */ | |
3663 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3664 | " for netfn %x cmd %x, got %d bytes\n", | |
3665 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3666 | ||
3667 | /* Generate an error response for the message. */ | |
3668 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3669 | msg->rsp[1] = msg->data[1]; | |
3670 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3671 | msg->rsp_size = 3; | |
c70d7499 CM |
3672 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3673 | || (msg->rsp[1] != msg->data[1])) { | |
3674 | /* | |
3675 | * The NetFN and Command in the response is not even | |
3676 | * marginally correct. | |
3677 | */ | |
1da177e4 LT |
3678 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3679 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3680 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3681 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3682 | ||
3683 | /* Generate an error response for the message. */ | |
3684 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3685 | msg->rsp[1] = msg->data[1]; | |
3686 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3687 | msg->rsp_size = 3; | |
3688 | } | |
3689 | ||
3690 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3691 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3692 | && (msg->user_data != NULL)) { |
3693 | /* | |
3694 | * It's a response to a response we sent. For this we | |
3695 | * deliver a send message response to the user. | |
3696 | */ | |
393d2cc3 | 3697 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3698 | |
3699 | requeue = 0; | |
3700 | if (msg->rsp_size < 2) | |
3701 | /* Message is too small to be correct. */ | |
3702 | goto out; | |
3703 | ||
3704 | chan = msg->data[2] & 0x0f; | |
3705 | if (chan >= IPMI_MAX_CHANNELS) | |
3706 | /* Invalid channel number */ | |
3707 | goto out; | |
3708 | ||
393d2cc3 CM |
3709 | if (!recv_msg) |
3710 | goto out; | |
3711 | ||
3712 | /* Make sure the user still exists. */ | |
3713 | if (!recv_msg->user || !recv_msg->user->valid) | |
3714 | goto out; | |
3715 | ||
3716 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3717 | recv_msg->msg.data = recv_msg->msg_data; | |
3718 | recv_msg->msg.data_len = 1; | |
3719 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3720 | deliver_response(recv_msg); | |
1da177e4 | 3721 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3722 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3723 | /* It's from the receive queue. */ |
3724 | chan = msg->rsp[3] & 0xf; | |
3725 | if (chan >= IPMI_MAX_CHANNELS) { | |
3726 | /* Invalid channel number */ | |
3727 | requeue = 0; | |
3728 | goto out; | |
3729 | } | |
3730 | ||
4dec302f | 3731 | /* |
9a2845c4 CM |
3732 | * We need to make sure the channels have been initialized. |
3733 | * The channel_handler routine will set the "curr_channel" | |
3734 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
3735 | * channels for this interface have been initialized. | |
3736 | */ | |
4dec302f | 3737 | if (intf->curr_channel < IPMI_MAX_CHANNELS) { |
9a2845c4 | 3738 | requeue = 0; /* Throw the message away */ |
4dec302f | 3739 | goto out; |
3740 | } | |
3741 | ||
1da177e4 LT |
3742 | switch (intf->channels[chan].medium) { |
3743 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3744 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3745 | /* |
3746 | * It's a response, so find the | |
3747 | * requesting message and send it up. | |
3748 | */ | |
1da177e4 LT |
3749 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3750 | } else { | |
c70d7499 CM |
3751 | /* |
3752 | * It's a command to the SMS from some other | |
3753 | * entity. Handle that. | |
3754 | */ | |
1da177e4 LT |
3755 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3756 | } | |
3757 | break; | |
3758 | ||
3759 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3760 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3761 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3762 | /* |
3763 | * It's a response, so find the | |
3764 | * requesting message and send it up. | |
3765 | */ | |
1da177e4 LT |
3766 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3767 | } else { | |
c70d7499 CM |
3768 | /* |
3769 | * It's a command to the SMS from some other | |
3770 | * entity. Handle that. | |
3771 | */ | |
1da177e4 LT |
3772 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3773 | } | |
3774 | break; | |
3775 | ||
3776 | default: | |
4dec302f | 3777 | /* Check for OEM Channels. Clients had better |
3778 | register for these commands. */ | |
3779 | if ((intf->channels[chan].medium | |
3780 | >= IPMI_CHANNEL_MEDIUM_OEM_MIN) | |
3781 | && (intf->channels[chan].medium | |
3782 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { | |
3783 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
3784 | } else { | |
3785 | /* | |
3786 | * We don't handle the channel type, so just | |
3787 | * free the message. | |
3788 | */ | |
3789 | requeue = 0; | |
3790 | } | |
1da177e4 LT |
3791 | } |
3792 | ||
3793 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3794 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 3795 | /* It's an asynchronous event. */ |
1da177e4 LT |
3796 | requeue = handle_read_event_rsp(intf, msg); |
3797 | } else { | |
3798 | /* It's a response from the local BMC. */ | |
3799 | requeue = handle_bmc_rsp(intf, msg); | |
3800 | } | |
3801 | ||
3802 | out: | |
3803 | return requeue; | |
3804 | } | |
3805 | ||
7adf579c CM |
3806 | /* |
3807 | * If there are messages in the queue or pretimeouts, handle them. | |
3808 | */ | |
3809 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
3810 | { | |
3811 | struct ipmi_smi_msg *smi_msg; | |
3812 | unsigned long flags = 0; | |
3813 | int rv; | |
3814 | int run_to_completion = intf->run_to_completion; | |
3815 | ||
3816 | /* See if any waiting messages need to be processed. */ | |
3817 | if (!run_to_completion) | |
65be7544 CM |
3818 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
3819 | while (!list_empty(&intf->waiting_rcv_msgs)) { | |
3820 | smi_msg = list_entry(intf->waiting_rcv_msgs.next, | |
7adf579c | 3821 | struct ipmi_smi_msg, link); |
ae4ea9a2 | 3822 | list_del(&smi_msg->link); |
7adf579c | 3823 | if (!run_to_completion) |
65be7544 CM |
3824 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, |
3825 | flags); | |
7adf579c CM |
3826 | rv = handle_one_recv_msg(intf, smi_msg); |
3827 | if (!run_to_completion) | |
65be7544 | 3828 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
7ea0ed2b | 3829 | if (rv > 0) { |
7adf579c CM |
3830 | /* |
3831 | * To preserve message order, quit if we | |
ae4ea9a2 JN |
3832 | * can't handle a message. Add the message |
3833 | * back at the head, this is safe because this | |
3834 | * tasklet is the only thing that pulls the | |
3835 | * messages. | |
7adf579c | 3836 | */ |
ae4ea9a2 | 3837 | list_add(&smi_msg->link, &intf->waiting_rcv_msgs); |
7adf579c | 3838 | break; |
7ea0ed2b | 3839 | } else { |
7ea0ed2b CM |
3840 | if (rv == 0) |
3841 | /* Message handled */ | |
3842 | ipmi_free_smi_msg(smi_msg); | |
3843 | /* If rv < 0, fatal error, del but don't free. */ | |
7adf579c CM |
3844 | } |
3845 | } | |
3846 | if (!run_to_completion) | |
65be7544 | 3847 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, flags); |
7adf579c CM |
3848 | |
3849 | /* | |
3850 | * If the pretimout count is non-zero, decrement one from it and | |
3851 | * deliver pretimeouts to all the users. | |
3852 | */ | |
3853 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
3854 | ipmi_user_t user; | |
3855 | ||
3856 | rcu_read_lock(); | |
3857 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3858 | if (user->handler->ipmi_watchdog_pretimeout) | |
3859 | user->handler->ipmi_watchdog_pretimeout( | |
3860 | user->handler_data); | |
3861 | } | |
3862 | rcu_read_unlock(); | |
3863 | } | |
3864 | } | |
3865 | ||
3866 | static void smi_recv_tasklet(unsigned long val) | |
3867 | { | |
7ea0ed2b CM |
3868 | unsigned long flags = 0; /* keep us warning-free. */ |
3869 | ipmi_smi_t intf = (ipmi_smi_t) val; | |
3870 | int run_to_completion = intf->run_to_completion; | |
3871 | struct ipmi_smi_msg *newmsg = NULL; | |
3872 | ||
3873 | /* | |
3874 | * Start the next message if available. | |
3875 | * | |
3876 | * Do this here, not in the actual receiver, because we may deadlock | |
3877 | * because the lower layer is allowed to hold locks while calling | |
3878 | * message delivery. | |
3879 | */ | |
3880 | if (!run_to_completion) | |
3881 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
3882 | if (intf->curr_msg == NULL && !intf->in_shutdown) { | |
3883 | struct list_head *entry = NULL; | |
3884 | ||
3885 | /* Pick the high priority queue first. */ | |
3886 | if (!list_empty(&intf->hp_xmit_msgs)) | |
3887 | entry = intf->hp_xmit_msgs.next; | |
3888 | else if (!list_empty(&intf->xmit_msgs)) | |
3889 | entry = intf->xmit_msgs.next; | |
3890 | ||
3891 | if (entry) { | |
3892 | list_del(entry); | |
3893 | newmsg = list_entry(entry, struct ipmi_smi_msg, link); | |
3894 | intf->curr_msg = newmsg; | |
3895 | } | |
3896 | } | |
3897 | if (!run_to_completion) | |
3898 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
3899 | if (newmsg) | |
99ab32f3 | 3900 | intf->handlers->sender(intf->send_info, newmsg); |
7ea0ed2b CM |
3901 | |
3902 | handle_new_recv_msgs(intf); | |
7adf579c CM |
3903 | } |
3904 | ||
1da177e4 LT |
3905 | /* Handle a new message from the lower layer. */ |
3906 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3907 | struct ipmi_smi_msg *msg) | |
3908 | { | |
5956dce1 | 3909 | unsigned long flags = 0; /* keep us warning-free. */ |
7ea0ed2b | 3910 | int run_to_completion = intf->run_to_completion; |
1da177e4 | 3911 | |
1da177e4 LT |
3912 | if ((msg->data_size >= 2) |
3913 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3914 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 | 3915 | && (msg->user_data == NULL)) { |
7ea0ed2b CM |
3916 | |
3917 | if (intf->in_shutdown) | |
3918 | goto free_msg; | |
3919 | ||
c70d7499 CM |
3920 | /* |
3921 | * This is the local response to a command send, start | |
3922 | * the timer for these. The user_data will not be | |
3923 | * NULL if this is a response send, and we will let | |
3924 | * response sends just go through. | |
3925 | */ | |
3926 | ||
3927 | /* | |
3928 | * Check for errors, if we get certain errors (ones | |
3929 | * that mean basically we can try again later), we | |
3930 | * ignore them and start the timer. Otherwise we | |
3931 | * report the error immediately. | |
3932 | */ | |
1da177e4 LT |
3933 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
3934 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
3935 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
3936 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 3937 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
3938 | int chan = msg->rsp[3] & 0xf; |
3939 | ||
3940 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
3941 | if (chan >= IPMI_MAX_CHANNELS) |
3942 | ; /* This shouldn't happen */ | |
3943 | else if ((intf->channels[chan].medium | |
3944 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3945 | || (intf->channels[chan].medium | |
3946 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 3947 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 3948 | else |
b2655f26 | 3949 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 3950 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 3951 | } else |
1da177e4 LT |
3952 | /* The message was sent, start the timer. */ |
3953 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 | 3954 | |
7ea0ed2b | 3955 | free_msg: |
1da177e4 | 3956 | ipmi_free_smi_msg(msg); |
7ea0ed2b CM |
3957 | } else { |
3958 | /* | |
3959 | * To preserve message order, we keep a queue and deliver from | |
3960 | * a tasklet. | |
3961 | */ | |
3962 | if (!run_to_completion) | |
3963 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); | |
3964 | list_add_tail(&msg->link, &intf->waiting_rcv_msgs); | |
3965 | if (!run_to_completion) | |
3966 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, | |
3967 | flags); | |
1da177e4 LT |
3968 | } |
3969 | ||
5956dce1 | 3970 | if (!run_to_completion) |
7ea0ed2b | 3971 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); |
b2234ee9 CM |
3972 | /* |
3973 | * We can get an asynchronous event or receive message in addition | |
3974 | * to commands we send. | |
3975 | */ | |
7ea0ed2b CM |
3976 | if (msg == intf->curr_msg) |
3977 | intf->curr_msg = NULL; | |
5956dce1 | 3978 | if (!run_to_completion) |
7ea0ed2b | 3979 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
c70d7499 | 3980 | |
7ea0ed2b CM |
3981 | if (run_to_completion) |
3982 | smi_recv_tasklet((unsigned long) intf); | |
3983 | else | |
3984 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 3985 | } |
c70d7499 | 3986 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
3987 | |
3988 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3989 | { | |
7ea0ed2b CM |
3990 | if (intf->in_shutdown) |
3991 | return; | |
3992 | ||
7adf579c CM |
3993 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
3994 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 3995 | } |
c70d7499 | 3996 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 3997 | |
882fe011 CM |
3998 | static struct ipmi_smi_msg * |
3999 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
4000 | unsigned char seq, long seqid) | |
1da177e4 | 4001 | { |
882fe011 | 4002 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 4003 | if (!smi_msg) |
c70d7499 CM |
4004 | /* |
4005 | * If we can't allocate the message, then just return, we | |
4006 | * get 4 retries, so this should be ok. | |
4007 | */ | |
882fe011 | 4008 | return NULL; |
1da177e4 LT |
4009 | |
4010 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
4011 | smi_msg->data_size = recv_msg->msg.data_len; | |
4012 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 4013 | |
1da177e4 LT |
4014 | #ifdef DEBUG_MSGING |
4015 | { | |
4016 | int m; | |
4017 | printk("Resend: "); | |
e8b33617 | 4018 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4019 | printk(" %2.2x", smi_msg->data[m]); |
4020 | printk("\n"); | |
4021 | } | |
4022 | #endif | |
882fe011 | 4023 | return smi_msg; |
1da177e4 LT |
4024 | } |
4025 | ||
393d2cc3 CM |
4026 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
4027 | struct list_head *timeouts, long timeout_period, | |
89986496 CM |
4028 | int slot, unsigned long *flags, |
4029 | unsigned int *waiting_msgs) | |
393d2cc3 | 4030 | { |
b2c03941 | 4031 | struct ipmi_recv_msg *msg; |
81d02b7f | 4032 | const struct ipmi_smi_handlers *handlers; |
b2c03941 | 4033 | |
7ea0ed2b | 4034 | if (intf->in_shutdown) |
b2c03941 | 4035 | return; |
393d2cc3 CM |
4036 | |
4037 | if (!ent->inuse) | |
4038 | return; | |
4039 | ||
4040 | ent->timeout -= timeout_period; | |
89986496 CM |
4041 | if (ent->timeout > 0) { |
4042 | (*waiting_msgs)++; | |
393d2cc3 | 4043 | return; |
89986496 | 4044 | } |
393d2cc3 CM |
4045 | |
4046 | if (ent->retries_left == 0) { | |
4047 | /* The message has used all its retries. */ | |
4048 | ent->inuse = 0; | |
4049 | msg = ent->recv_msg; | |
4050 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4051 | if (ent->broadcast) |
b2655f26 | 4052 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4053 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4054 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4055 | else |
b2655f26 | 4056 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4057 | } else { |
4058 | struct ipmi_smi_msg *smi_msg; | |
4059 | /* More retries, send again. */ | |
4060 | ||
89986496 CM |
4061 | (*waiting_msgs)++; |
4062 | ||
c70d7499 CM |
4063 | /* |
4064 | * Start with the max timer, set to normal timer after | |
4065 | * the message is sent. | |
4066 | */ | |
393d2cc3 CM |
4067 | ent->timeout = MAX_MSG_TIMEOUT; |
4068 | ent->retries_left--; | |
393d2cc3 CM |
4069 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4070 | ent->seqid); | |
25176ed6 CM |
4071 | if (!smi_msg) { |
4072 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4073 | ipmi_inc_stat(intf, | |
4074 | dropped_rexmit_lan_commands); | |
4075 | else | |
4076 | ipmi_inc_stat(intf, | |
4077 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4078 | return; |
25176ed6 | 4079 | } |
393d2cc3 CM |
4080 | |
4081 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4082 | |
c70d7499 CM |
4083 | /* |
4084 | * Send the new message. We send with a zero | |
4085 | * priority. It timed out, I doubt time is that | |
4086 | * critical now, and high priority messages are really | |
4087 | * only for messages to the local MC, which don't get | |
4088 | * resent. | |
4089 | */ | |
b2c03941 | 4090 | handlers = intf->handlers; |
25176ed6 CM |
4091 | if (handlers) { |
4092 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4093 | ipmi_inc_stat(intf, | |
4094 | retransmitted_lan_commands); | |
4095 | else | |
4096 | ipmi_inc_stat(intf, | |
4097 | retransmitted_ipmb_commands); | |
4098 | ||
81d02b7f | 4099 | smi_send(intf, handlers, smi_msg, 0); |
25176ed6 | 4100 | } else |
b2c03941 CM |
4101 | ipmi_free_smi_msg(smi_msg); |
4102 | ||
393d2cc3 CM |
4103 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4104 | } | |
4105 | } | |
4106 | ||
89986496 | 4107 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period) |
1da177e4 | 4108 | { |
1da177e4 LT |
4109 | struct list_head timeouts; |
4110 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4111 | unsigned long flags; |
bca0324d | 4112 | int i; |
89986496 | 4113 | unsigned int waiting_msgs = 0; |
1da177e4 | 4114 | |
89986496 CM |
4115 | /* |
4116 | * Go through the seq table and find any messages that | |
4117 | * have timed out, putting them in the timeouts | |
4118 | * list. | |
4119 | */ | |
4120 | INIT_LIST_HEAD(&timeouts); | |
4121 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4122 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4123 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4124 | &timeouts, timeout_period, i, | |
4125 | &flags, &waiting_msgs); | |
4126 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4127 | |
89986496 CM |
4128 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4129 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4130 | |
89986496 CM |
4131 | /* |
4132 | * Maintenance mode handling. Check the timeout | |
4133 | * optimistically before we claim the lock. It may | |
4134 | * mean a timeout gets missed occasionally, but that | |
4135 | * only means the timeout gets extended by one period | |
4136 | * in that case. No big deal, and it avoids the lock | |
4137 | * most of the time. | |
4138 | */ | |
4139 | if (intf->auto_maintenance_timeout > 0) { | |
4140 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4141 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4142 | intf->auto_maintenance_timeout |
4143 | -= timeout_period; | |
4144 | if (!intf->maintenance_mode | |
4145 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4146 | intf->maintenance_mode_enable = false; |
89986496 | 4147 | maintenance_mode_update(intf); |
b9675136 | 4148 | } |
b9675136 | 4149 | } |
89986496 CM |
4150 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4151 | flags); | |
1da177e4 | 4152 | } |
89986496 CM |
4153 | |
4154 | tasklet_schedule(&intf->recv_tasklet); | |
4155 | ||
4156 | return waiting_msgs; | |
1da177e4 LT |
4157 | } |
4158 | ||
89986496 | 4159 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4160 | { |
89986496 CM |
4161 | /* No event requests when in maintenance mode. */ |
4162 | if (intf->maintenance_mode_enable) | |
4163 | return; | |
b9675136 | 4164 | |
7ea0ed2b CM |
4165 | if (!intf->in_shutdown) |
4166 | intf->handlers->request_events(intf->send_info); | |
1da177e4 LT |
4167 | } |
4168 | ||
4169 | static struct timer_list ipmi_timer; | |
4170 | ||
8f43f84f | 4171 | static atomic_t stop_operation; |
1da177e4 LT |
4172 | |
4173 | static void ipmi_timeout(unsigned long data) | |
4174 | { | |
89986496 CM |
4175 | ipmi_smi_t intf; |
4176 | int nt = 0; | |
4177 | ||
8f43f84f | 4178 | if (atomic_read(&stop_operation)) |
1da177e4 | 4179 | return; |
1da177e4 | 4180 | |
89986496 CM |
4181 | rcu_read_lock(); |
4182 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4183 | int lnt = 0; | |
4184 | ||
4185 | if (atomic_read(&intf->event_waiters)) { | |
4186 | intf->ticks_to_req_ev--; | |
4187 | if (intf->ticks_to_req_ev == 0) { | |
4188 | ipmi_request_event(intf); | |
4189 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4190 | } | |
4191 | lnt++; | |
4192 | } | |
4193 | ||
4194 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4195 | |
89986496 CM |
4196 | lnt = !!lnt; |
4197 | if (lnt != intf->last_needs_timer && | |
4198 | intf->handlers->set_need_watch) | |
4199 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4200 | intf->last_needs_timer = lnt; | |
1da177e4 | 4201 | |
89986496 CM |
4202 | nt += lnt; |
4203 | } | |
4204 | rcu_read_unlock(); | |
4205 | ||
4206 | if (nt) | |
4207 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4208 | } |
4209 | ||
89986496 CM |
4210 | static void need_waiter(ipmi_smi_t intf) |
4211 | { | |
4212 | /* Racy, but worst case we start the timer twice. */ | |
4213 | if (!timer_pending(&ipmi_timer)) | |
4214 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4215 | } | |
1da177e4 LT |
4216 | |
4217 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4218 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4219 | ||
1da177e4 LT |
4220 | static void free_smi_msg(struct ipmi_smi_msg *msg) |
4221 | { | |
4222 | atomic_dec(&smi_msg_inuse_count); | |
4223 | kfree(msg); | |
4224 | } | |
4225 | ||
4226 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4227 | { | |
4228 | struct ipmi_smi_msg *rv; | |
4229 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4230 | if (rv) { | |
4231 | rv->done = free_smi_msg; | |
4232 | rv->user_data = NULL; | |
4233 | atomic_inc(&smi_msg_inuse_count); | |
4234 | } | |
4235 | return rv; | |
4236 | } | |
c70d7499 | 4237 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4238 | |
4239 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4240 | { | |
4241 | atomic_dec(&recv_msg_inuse_count); | |
4242 | kfree(msg); | |
4243 | } | |
4244 | ||
74006309 | 4245 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4246 | { |
4247 | struct ipmi_recv_msg *rv; | |
4248 | ||
4249 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4250 | if (rv) { | |
a9eec556 | 4251 | rv->user = NULL; |
1da177e4 LT |
4252 | rv->done = free_recv_msg; |
4253 | atomic_inc(&recv_msg_inuse_count); | |
4254 | } | |
4255 | return rv; | |
4256 | } | |
4257 | ||
393d2cc3 CM |
4258 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4259 | { | |
4260 | if (msg->user) | |
4261 | kref_put(&msg->user->refcount, free_user); | |
4262 | msg->done(msg); | |
4263 | } | |
c70d7499 | 4264 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4265 | |
1da177e4 LT |
4266 | #ifdef CONFIG_IPMI_PANIC_EVENT |
4267 | ||
895dcfd1 CM |
4268 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4269 | ||
1da177e4 LT |
4270 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4271 | { | |
895dcfd1 | 4272 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4273 | } |
4274 | ||
4275 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4276 | { | |
895dcfd1 CM |
4277 | atomic_dec(&panic_done_count); |
4278 | } | |
4279 | ||
4280 | /* | |
4281 | * Inside a panic, send a message and wait for a response. | |
4282 | */ | |
4283 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4284 | struct ipmi_addr *addr, | |
4285 | struct kernel_ipmi_msg *msg) | |
4286 | { | |
4287 | struct ipmi_smi_msg smi_msg; | |
4288 | struct ipmi_recv_msg recv_msg; | |
4289 | int rv; | |
4290 | ||
4291 | smi_msg.done = dummy_smi_done_handler; | |
4292 | recv_msg.done = dummy_recv_done_handler; | |
4293 | atomic_add(2, &panic_done_count); | |
4294 | rv = i_ipmi_request(NULL, | |
4295 | intf, | |
4296 | addr, | |
4297 | 0, | |
4298 | msg, | |
4299 | intf, | |
4300 | &smi_msg, | |
4301 | &recv_msg, | |
4302 | 0, | |
4303 | intf->channels[0].address, | |
4304 | intf->channels[0].lun, | |
4305 | 0, 1); /* Don't retry, and don't wait. */ | |
4306 | if (rv) | |
4307 | atomic_sub(2, &panic_done_count); | |
82802f96 HK |
4308 | else if (intf->handlers->flush_messages) |
4309 | intf->handlers->flush_messages(intf->send_info); | |
4310 | ||
895dcfd1 CM |
4311 | while (atomic_read(&panic_done_count) != 0) |
4312 | ipmi_poll(intf); | |
1da177e4 LT |
4313 | } |
4314 | ||
4315 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 4316 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4317 | { |
56a55ec6 CM |
4318 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4319 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4320 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4321 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4322 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4323 | intf->event_receiver = msg->msg.data[1]; |
4324 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4325 | } |
4326 | } | |
4327 | ||
56a55ec6 | 4328 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4329 | { |
56a55ec6 CM |
4330 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4331 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4332 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4333 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4334 | /* | |
4335 | * A get device id command, save if we are an event | |
4336 | * receiver or generator. | |
4337 | */ | |
56a55ec6 CM |
4338 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4339 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4340 | } |
4341 | } | |
4342 | #endif | |
4343 | ||
4344 | static void send_panic_events(char *str) | |
4345 | { | |
4346 | struct kernel_ipmi_msg msg; | |
4347 | ipmi_smi_t intf; | |
4348 | unsigned char data[16]; | |
1da177e4 LT |
4349 | struct ipmi_system_interface_addr *si; |
4350 | struct ipmi_addr addr; | |
1da177e4 LT |
4351 | |
4352 | si = (struct ipmi_system_interface_addr *) &addr; | |
4353 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4354 | si->channel = IPMI_BMC_CHANNEL; | |
4355 | si->lun = 0; | |
4356 | ||
4357 | /* Fill in an event telling that we have failed. */ | |
4358 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4359 | msg.cmd = 2; /* Platform event command. */ | |
4360 | msg.data = data; | |
4361 | msg.data_len = 8; | |
cda315ab | 4362 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4363 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4364 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4365 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4366 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4367 | ||
c70d7499 CM |
4368 | /* |
4369 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4370 | * to make the panic events more useful. | |
4371 | */ | |
1da177e4 LT |
4372 | if (str) { |
4373 | data[3] = str[0]; | |
4374 | data[6] = str[1]; | |
4375 | data[7] = str[2]; | |
4376 | } | |
4377 | ||
1da177e4 | 4378 | /* For every registered interface, send the event. */ |
bca0324d | 4379 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4380 | if (!intf->handlers) |
4381 | /* Interface is not ready. */ | |
1da177e4 LT |
4382 | continue; |
4383 | ||
4384 | /* Send the event announcing the panic. */ | |
895dcfd1 | 4385 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4386 | } |
4387 | ||
4388 | #ifdef CONFIG_IPMI_PANIC_STRING | |
c70d7499 CM |
4389 | /* |
4390 | * On every interface, dump a bunch of OEM event holding the | |
4391 | * string. | |
4392 | */ | |
4393 | if (!str) | |
1da177e4 LT |
4394 | return; |
4395 | ||
bca0324d CM |
4396 | /* For every registered interface, send the event. */ |
4397 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4398 | char *p = str; |
4399 | struct ipmi_ipmb_addr *ipmb; | |
4400 | int j; | |
4401 | ||
bca0324d CM |
4402 | if (intf->intf_num == -1) |
4403 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4404 | continue; |
4405 | ||
78ba2faf CM |
4406 | /* |
4407 | * intf_num is used as an marker to tell if the | |
4408 | * interface is valid. Thus we need a read barrier to | |
4409 | * make sure data fetched before checking intf_num | |
4410 | * won't be used. | |
4411 | */ | |
4412 | smp_rmb(); | |
4413 | ||
c70d7499 CM |
4414 | /* |
4415 | * First job here is to figure out where to send the | |
4416 | * OEM events. There's no way in IPMI to send OEM | |
4417 | * events using an event send command, so we have to | |
4418 | * find the SEL to put them in and stick them in | |
4419 | * there. | |
4420 | */ | |
1da177e4 LT |
4421 | |
4422 | /* Get capabilities from the get device id. */ | |
4423 | intf->local_sel_device = 0; | |
4424 | intf->local_event_generator = 0; | |
4425 | intf->event_receiver = 0; | |
4426 | ||
4427 | /* Request the device info from the local MC. */ | |
4428 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4429 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4430 | msg.data = NULL; | |
4431 | msg.data_len = 0; | |
4432 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 4433 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4434 | |
4435 | if (intf->local_event_generator) { | |
4436 | /* Request the event receiver from the local MC. */ | |
4437 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4438 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4439 | msg.data = NULL; | |
4440 | msg.data_len = 0; | |
4441 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 4442 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4443 | } |
4444 | intf->null_user_handler = NULL; | |
4445 | ||
c70d7499 CM |
4446 | /* |
4447 | * Validate the event receiver. The low bit must not | |
4448 | * be 1 (it must be a valid IPMB address), it cannot | |
4449 | * be zero, and it must not be my address. | |
4450 | */ | |
4451 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4452 | && (intf->event_receiver != 0) |
c70d7499 CM |
4453 | && (intf->event_receiver != intf->channels[0].address)) { |
4454 | /* | |
4455 | * The event receiver is valid, send an IPMB | |
4456 | * message. | |
4457 | */ | |
1da177e4 LT |
4458 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4459 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4460 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4461 | ipmb->lun = intf->event_receiver_lun; | |
4462 | ipmb->slave_addr = intf->event_receiver; | |
4463 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4464 | /* |
4465 | * The event receiver was not valid (or was | |
4466 | * me), but I am an SEL device, just dump it | |
4467 | * in my SEL. | |
4468 | */ | |
1da177e4 LT |
4469 | si = (struct ipmi_system_interface_addr *) &addr; |
4470 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4471 | si->channel = IPMI_BMC_CHANNEL; | |
4472 | si->lun = 0; | |
4473 | } else | |
4474 | continue; /* No where to send the event. */ | |
4475 | ||
1da177e4 LT |
4476 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4477 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4478 | msg.data = data; | |
4479 | msg.data_len = 16; | |
4480 | ||
4481 | j = 0; | |
4482 | while (*p) { | |
4483 | int size = strlen(p); | |
4484 | ||
4485 | if (size > 11) | |
4486 | size = 11; | |
4487 | data[0] = 0; | |
4488 | data[1] = 0; | |
4489 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4490 | data[3] = intf->channels[0].address; |
1da177e4 | 4491 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4492 | /* |
4493 | * Always give 11 bytes, so strncpy will fill | |
4494 | * it with zeroes for me. | |
4495 | */ | |
1da177e4 LT |
4496 | strncpy(data+5, p, 11); |
4497 | p += size; | |
4498 | ||
895dcfd1 | 4499 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 4500 | } |
c70d7499 | 4501 | } |
1da177e4 LT |
4502 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
4503 | } | |
4504 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
4505 | ||
0c8204b3 | 4506 | static int has_panicked; |
1da177e4 LT |
4507 | |
4508 | static int panic_event(struct notifier_block *this, | |
4509 | unsigned long event, | |
c70d7499 | 4510 | void *ptr) |
1da177e4 | 4511 | { |
1da177e4 LT |
4512 | ipmi_smi_t intf; |
4513 | ||
f18190bd | 4514 | if (has_panicked) |
1da177e4 | 4515 | return NOTIFY_DONE; |
f18190bd | 4516 | has_panicked = 1; |
1da177e4 LT |
4517 | |
4518 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4519 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4520 | if (!intf->handlers) |
4521 | /* Interface is not ready. */ | |
1da177e4 LT |
4522 | continue; |
4523 | ||
06e5e345 HK |
4524 | /* |
4525 | * If we were interrupted while locking xmit_msgs_lock or | |
4526 | * waiting_rcv_msgs_lock, the corresponding list may be | |
4527 | * corrupted. In this case, drop items on the list for | |
4528 | * the safety. | |
4529 | */ | |
4530 | if (!spin_trylock(&intf->xmit_msgs_lock)) { | |
4531 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
4532 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
4533 | } else | |
4534 | spin_unlock(&intf->xmit_msgs_lock); | |
4535 | ||
4536 | if (!spin_trylock(&intf->waiting_rcv_msgs_lock)) | |
4537 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
4538 | else | |
4539 | spin_unlock(&intf->waiting_rcv_msgs_lock); | |
4540 | ||
5956dce1 | 4541 | intf->run_to_completion = 1; |
1da177e4 LT |
4542 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
4543 | } | |
4544 | ||
4545 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
4546 | send_panic_events(ptr); | |
4547 | #endif | |
4548 | ||
4549 | return NOTIFY_DONE; | |
4550 | } | |
4551 | ||
4552 | static struct notifier_block panic_block = { | |
4553 | .notifier_call = panic_event, | |
4554 | .next = NULL, | |
4555 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4556 | }; | |
4557 | ||
4558 | static int ipmi_init_msghandler(void) | |
4559 | { | |
50c812b2 | 4560 | int rv; |
1da177e4 LT |
4561 | |
4562 | if (initialized) | |
4563 | return 0; | |
4564 | ||
fe2d5ffc | 4565 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4566 | if (rv) { |
4567 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4568 | return rv; | |
4569 | } | |
4570 | ||
1da177e4 | 4571 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4572 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4573 | |
3b625943 | 4574 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4575 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4576 | if (!proc_ipmi_root) { | |
4577 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
80fad5b9 | 4578 | driver_unregister(&ipmidriver.driver); |
1da177e4 LT |
4579 | return -ENOMEM; |
4580 | } | |
4581 | ||
3b625943 | 4582 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4583 | |
409035e0 CM |
4584 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4585 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4586 | |
e041c683 | 4587 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4588 | |
4589 | initialized = 1; | |
4590 | ||
4591 | return 0; | |
4592 | } | |
4593 | ||
60ee6d5f | 4594 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
4595 | { |
4596 | ipmi_init_msghandler(); | |
4597 | return 0; | |
4598 | } | |
4599 | ||
60ee6d5f | 4600 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
4601 | { |
4602 | int count; | |
4603 | ||
4604 | if (!initialized) | |
4605 | return; | |
4606 | ||
e041c683 | 4607 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4608 | |
c70d7499 CM |
4609 | /* |
4610 | * This can't be called if any interfaces exist, so no worry | |
4611 | * about shutting down the interfaces. | |
4612 | */ | |
1da177e4 | 4613 | |
c70d7499 CM |
4614 | /* |
4615 | * Tell the timer to stop, then wait for it to stop. This | |
4616 | * avoids problems with race conditions removing the timer | |
4617 | * here. | |
4618 | */ | |
8f43f84f CM |
4619 | atomic_inc(&stop_operation); |
4620 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4621 | |
3b625943 | 4622 | #ifdef CONFIG_PROC_FS |
a8ca16ea | 4623 | proc_remove(proc_ipmi_root); |
3b625943 | 4624 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4625 | |
fe2d5ffc | 4626 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4627 | |
1da177e4 LT |
4628 | initialized = 0; |
4629 | ||
4630 | /* Check for buffer leaks. */ | |
4631 | count = atomic_read(&smi_msg_inuse_count); | |
4632 | if (count != 0) | |
4633 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4634 | count); | |
4635 | count = atomic_read(&recv_msg_inuse_count); | |
4636 | if (count != 0) | |
4637 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4638 | count); | |
4639 | } | |
4640 | module_exit(cleanup_ipmi); | |
4641 | ||
4642 | module_init(ipmi_init_msghandler_mod); | |
4643 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4644 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4645 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4646 | " interface."); | |
1fdd75bd | 4647 | MODULE_VERSION(IPMI_DRIVER_VERSION); |