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