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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 CM |
202 | |
203 | /* bmc device attributes */ | |
204 | struct device_attribute device_id_attr; | |
205 | struct device_attribute provides_dev_sdrs_attr; | |
206 | struct device_attribute revision_attr; | |
207 | struct device_attribute firmware_rev_attr; | |
208 | struct device_attribute version_attr; | |
209 | struct device_attribute add_dev_support_attr; | |
210 | struct device_attribute manufacturer_id_attr; | |
211 | struct device_attribute product_id_attr; | |
212 | struct device_attribute guid_attr; | |
213 | struct device_attribute aux_firmware_rev_attr; | |
214 | }; | |
16639eb0 | 215 | #define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev) |
50c812b2 | 216 | |
b2655f26 KB |
217 | /* |
218 | * Various statistics for IPMI, these index stats[] in the ipmi_smi | |
219 | * structure. | |
220 | */ | |
73f2bdb9 CM |
221 | enum ipmi_stat_indexes { |
222 | /* Commands we got from the user that were invalid. */ | |
223 | IPMI_STAT_sent_invalid_commands = 0, | |
b2655f26 | 224 | |
73f2bdb9 CM |
225 | /* Commands we sent to the MC. */ |
226 | IPMI_STAT_sent_local_commands, | |
b2655f26 | 227 | |
73f2bdb9 CM |
228 | /* Responses from the MC that were delivered to a user. */ |
229 | IPMI_STAT_handled_local_responses, | |
b2655f26 | 230 | |
73f2bdb9 CM |
231 | /* Responses from the MC that were not delivered to a user. */ |
232 | IPMI_STAT_unhandled_local_responses, | |
b2655f26 | 233 | |
73f2bdb9 CM |
234 | /* Commands we sent out to the IPMB bus. */ |
235 | IPMI_STAT_sent_ipmb_commands, | |
b2655f26 | 236 | |
73f2bdb9 CM |
237 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
238 | IPMI_STAT_sent_ipmb_command_errs, | |
b2655f26 | 239 | |
73f2bdb9 CM |
240 | /* Each retransmit increments this count. */ |
241 | IPMI_STAT_retransmitted_ipmb_commands, | |
b2655f26 | 242 | |
73f2bdb9 CM |
243 | /* |
244 | * When a message times out (runs out of retransmits) this is | |
245 | * incremented. | |
246 | */ | |
247 | IPMI_STAT_timed_out_ipmb_commands, | |
b2655f26 | 248 | |
73f2bdb9 CM |
249 | /* |
250 | * This is like above, but for broadcasts. Broadcasts are | |
251 | * *not* included in the above count (they are expected to | |
252 | * time out). | |
253 | */ | |
254 | IPMI_STAT_timed_out_ipmb_broadcasts, | |
b2655f26 | 255 | |
73f2bdb9 CM |
256 | /* Responses I have sent to the IPMB bus. */ |
257 | IPMI_STAT_sent_ipmb_responses, | |
b2655f26 | 258 | |
73f2bdb9 CM |
259 | /* The response was delivered to the user. */ |
260 | IPMI_STAT_handled_ipmb_responses, | |
b2655f26 | 261 | |
73f2bdb9 CM |
262 | /* The response had invalid data in it. */ |
263 | IPMI_STAT_invalid_ipmb_responses, | |
b2655f26 | 264 | |
73f2bdb9 CM |
265 | /* The response didn't have anyone waiting for it. */ |
266 | IPMI_STAT_unhandled_ipmb_responses, | |
b2655f26 | 267 | |
73f2bdb9 CM |
268 | /* Commands we sent out to the IPMB bus. */ |
269 | IPMI_STAT_sent_lan_commands, | |
b2655f26 | 270 | |
73f2bdb9 CM |
271 | /* Commands sent on the IPMB that had errors on the SEND CMD */ |
272 | IPMI_STAT_sent_lan_command_errs, | |
b2655f26 | 273 | |
73f2bdb9 CM |
274 | /* Each retransmit increments this count. */ |
275 | IPMI_STAT_retransmitted_lan_commands, | |
b2655f26 | 276 | |
73f2bdb9 CM |
277 | /* |
278 | * When a message times out (runs out of retransmits) this is | |
279 | * incremented. | |
280 | */ | |
281 | IPMI_STAT_timed_out_lan_commands, | |
282 | ||
283 | /* Responses I have sent to the IPMB bus. */ | |
284 | IPMI_STAT_sent_lan_responses, | |
b2655f26 | 285 | |
73f2bdb9 CM |
286 | /* The response was delivered to the user. */ |
287 | IPMI_STAT_handled_lan_responses, | |
b2655f26 | 288 | |
73f2bdb9 CM |
289 | /* The response had invalid data in it. */ |
290 | IPMI_STAT_invalid_lan_responses, | |
b2655f26 | 291 | |
73f2bdb9 CM |
292 | /* The response didn't have anyone waiting for it. */ |
293 | IPMI_STAT_unhandled_lan_responses, | |
b2655f26 | 294 | |
73f2bdb9 CM |
295 | /* The command was delivered to the user. */ |
296 | IPMI_STAT_handled_commands, | |
b2655f26 | 297 | |
73f2bdb9 CM |
298 | /* The command had invalid data in it. */ |
299 | IPMI_STAT_invalid_commands, | |
b2655f26 | 300 | |
73f2bdb9 CM |
301 | /* The command didn't have anyone waiting for it. */ |
302 | IPMI_STAT_unhandled_commands, | |
b2655f26 | 303 | |
73f2bdb9 CM |
304 | /* Invalid data in an event. */ |
305 | IPMI_STAT_invalid_events, | |
b2655f26 | 306 | |
73f2bdb9 CM |
307 | /* Events that were received with the proper format. */ |
308 | IPMI_STAT_events, | |
b2655f26 | 309 | |
25176ed6 CM |
310 | /* Retransmissions on IPMB that failed. */ |
311 | IPMI_STAT_dropped_rexmit_ipmb_commands, | |
312 | ||
313 | /* Retransmissions on LAN that failed. */ | |
314 | IPMI_STAT_dropped_rexmit_lan_commands, | |
b2655f26 | 315 | |
73f2bdb9 CM |
316 | /* This *must* remain last, add new values above this. */ |
317 | IPMI_NUM_STATS | |
318 | }; | |
b2655f26 KB |
319 | |
320 | ||
1da177e4 | 321 | #define IPMI_IPMB_NUM_SEQ 64 |
c14979b9 | 322 | #define IPMI_MAX_CHANNELS 16 |
c70d7499 | 323 | struct ipmi_smi { |
1da177e4 LT |
324 | /* What interface number are we? */ |
325 | int intf_num; | |
326 | ||
393d2cc3 CM |
327 | struct kref refcount; |
328 | ||
7ea0ed2b CM |
329 | /* Set when the interface is being unregistered. */ |
330 | bool in_shutdown; | |
331 | ||
bca0324d CM |
332 | /* Used for a list of interfaces. */ |
333 | struct list_head link; | |
334 | ||
c70d7499 CM |
335 | /* |
336 | * The list of upper layers that are using me. seq_lock | |
337 | * protects this. | |
338 | */ | |
393d2cc3 | 339 | struct list_head users; |
1da177e4 | 340 | |
b2c03941 CM |
341 | /* Information to supply to users. */ |
342 | unsigned char ipmi_version_major; | |
343 | unsigned char ipmi_version_minor; | |
344 | ||
1da177e4 LT |
345 | /* Used for wake ups at startup. */ |
346 | wait_queue_head_t waitq; | |
347 | ||
50c812b2 CM |
348 | struct bmc_device *bmc; |
349 | char *my_dev_name; | |
1da177e4 | 350 | |
c70d7499 CM |
351 | /* |
352 | * This is the lower-layer's sender routine. Note that you | |
b2c03941 CM |
353 | * must either be holding the ipmi_interfaces_mutex or be in |
354 | * an umpreemptible region to use this. You must fetch the | |
c70d7499 CM |
355 | * value into a local variable and make sure it is not NULL. |
356 | */ | |
1da177e4 LT |
357 | struct ipmi_smi_handlers *handlers; |
358 | void *send_info; | |
359 | ||
3b625943 | 360 | #ifdef CONFIG_PROC_FS |
ac019151 CM |
361 | /* A list of proc entries for this interface. */ |
362 | struct mutex proc_entry_lock; | |
1da177e4 | 363 | struct ipmi_proc_entry *proc_entries; |
3b625943 | 364 | #endif |
1da177e4 | 365 | |
50c812b2 CM |
366 | /* Driver-model device for the system interface. */ |
367 | struct device *si_dev; | |
368 | ||
c70d7499 CM |
369 | /* |
370 | * A table of sequence numbers for this interface. We use the | |
371 | * sequence numbers for IPMB messages that go out of the | |
372 | * interface to match them up with their responses. A routine | |
373 | * is called periodically to time the items in this list. | |
374 | */ | |
1da177e4 LT |
375 | spinlock_t seq_lock; |
376 | struct seq_table seq_table[IPMI_IPMB_NUM_SEQ]; | |
377 | int curr_seq; | |
378 | ||
c70d7499 | 379 | /* |
7adf579c CM |
380 | * Messages queued for delivery. If delivery fails (out of memory |
381 | * for instance), They will stay in here to be processed later in a | |
382 | * periodic timer interrupt. The tasklet is for handling received | |
383 | * messages directly from the handler. | |
c70d7499 | 384 | */ |
65be7544 CM |
385 | spinlock_t waiting_rcv_msgs_lock; |
386 | struct list_head waiting_rcv_msgs; | |
7adf579c CM |
387 | atomic_t watchdog_pretimeouts_to_deliver; |
388 | struct tasklet_struct recv_tasklet; | |
1da177e4 | 389 | |
7ea0ed2b CM |
390 | spinlock_t xmit_msgs_lock; |
391 | struct list_head xmit_msgs; | |
392 | struct ipmi_smi_msg *curr_msg; | |
393 | struct list_head hp_xmit_msgs; | |
394 | ||
c70d7499 CM |
395 | /* |
396 | * The list of command receivers that are registered for commands | |
397 | * on this interface. | |
398 | */ | |
d6dfd131 | 399 | struct mutex cmd_rcvrs_mutex; |
1da177e4 LT |
400 | struct list_head cmd_rcvrs; |
401 | ||
c70d7499 CM |
402 | /* |
403 | * Events that were queues because no one was there to receive | |
404 | * them. | |
405 | */ | |
1da177e4 LT |
406 | spinlock_t events_lock; /* For dealing with event stuff. */ |
407 | struct list_head waiting_events; | |
408 | unsigned int waiting_events_count; /* How many events in queue? */ | |
87ebd06f CM |
409 | char delivering_events; |
410 | char event_msg_printed; | |
89986496 CM |
411 | atomic_t event_waiters; |
412 | unsigned int ticks_to_req_ev; | |
413 | int last_needs_timer; | |
1da177e4 | 414 | |
c70d7499 CM |
415 | /* |
416 | * The event receiver for my BMC, only really used at panic | |
417 | * shutdown as a place to store this. | |
418 | */ | |
1da177e4 LT |
419 | unsigned char event_receiver; |
420 | unsigned char event_receiver_lun; | |
421 | unsigned char local_sel_device; | |
422 | unsigned char local_event_generator; | |
423 | ||
b9675136 CM |
424 | /* For handling of maintenance mode. */ |
425 | int maintenance_mode; | |
7aefac26 | 426 | bool maintenance_mode_enable; |
b9675136 CM |
427 | int auto_maintenance_timeout; |
428 | spinlock_t maintenance_mode_lock; /* Used in a timer... */ | |
429 | ||
c70d7499 CM |
430 | /* |
431 | * A cheap hack, if this is non-null and a message to an | |
432 | * interface comes in with a NULL user, call this routine with | |
433 | * it. Note that the message will still be freed by the | |
434 | * caller. This only works on the system interface. | |
435 | */ | |
56a55ec6 | 436 | void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg); |
1da177e4 | 437 | |
c70d7499 CM |
438 | /* |
439 | * When we are scanning the channels for an SMI, this will | |
440 | * tell which channel we are scanning. | |
441 | */ | |
1da177e4 LT |
442 | int curr_channel; |
443 | ||
444 | /* Channel information */ | |
445 | struct ipmi_channel channels[IPMI_MAX_CHANNELS]; | |
446 | ||
447 | /* Proc FS stuff. */ | |
448 | struct proc_dir_entry *proc_dir; | |
449 | char proc_dir_name[10]; | |
450 | ||
b2655f26 | 451 | atomic_t stats[IPMI_NUM_STATS]; |
5956dce1 KB |
452 | |
453 | /* | |
454 | * run_to_completion duplicate of smb_info, smi_info | |
455 | * and ipmi_serial_info structures. Used to decrease numbers of | |
456 | * parameters passed by "low" level IPMI code. | |
457 | */ | |
458 | int run_to_completion; | |
1da177e4 | 459 | }; |
50c812b2 | 460 | #define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev) |
1da177e4 | 461 | |
50c812b2 CM |
462 | /** |
463 | * The driver model view of the IPMI messaging driver. | |
464 | */ | |
fe2d5ffc DW |
465 | static struct platform_driver ipmidriver = { |
466 | .driver = { | |
467 | .name = "ipmi", | |
468 | .bus = &platform_bus_type | |
469 | } | |
50c812b2 CM |
470 | }; |
471 | static DEFINE_MUTEX(ipmidriver_mutex); | |
472 | ||
bed9759b | 473 | static LIST_HEAD(ipmi_interfaces); |
bca0324d | 474 | static DEFINE_MUTEX(ipmi_interfaces_mutex); |
1da177e4 | 475 | |
c70d7499 CM |
476 | /* |
477 | * List of watchers that want to know when smi's are added and deleted. | |
478 | */ | |
bed9759b | 479 | static LIST_HEAD(smi_watchers); |
b2c03941 | 480 | static DEFINE_MUTEX(smi_watchers_mutex); |
1da177e4 | 481 | |
b2655f26 KB |
482 | #define ipmi_inc_stat(intf, stat) \ |
483 | atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) | |
484 | #define ipmi_get_stat(intf, stat) \ | |
485 | ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) | |
486 | ||
7e50387b CM |
487 | static char *addr_src_to_str[] = { "invalid", "hotmod", "hardcoded", "SPMI", |
488 | "ACPI", "SMBIOS", "PCI", | |
489 | "device-tree", "default" }; | |
490 | ||
491 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src) | |
492 | { | |
493 | if (src > SI_DEFAULT) | |
494 | src = 0; /* Invalid */ | |
495 | return addr_src_to_str[src]; | |
496 | } | |
497 | EXPORT_SYMBOL(ipmi_addr_src_to_str); | |
498 | ||
25176ed6 CM |
499 | static int is_lan_addr(struct ipmi_addr *addr) |
500 | { | |
501 | return addr->addr_type == IPMI_LAN_ADDR_TYPE; | |
502 | } | |
503 | ||
504 | static int is_ipmb_addr(struct ipmi_addr *addr) | |
505 | { | |
506 | return addr->addr_type == IPMI_IPMB_ADDR_TYPE; | |
507 | } | |
508 | ||
509 | static int is_ipmb_bcast_addr(struct ipmi_addr *addr) | |
510 | { | |
511 | return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; | |
512 | } | |
b2655f26 | 513 | |
393d2cc3 CM |
514 | static void free_recv_msg_list(struct list_head *q) |
515 | { | |
516 | struct ipmi_recv_msg *msg, *msg2; | |
517 | ||
518 | list_for_each_entry_safe(msg, msg2, q, link) { | |
519 | list_del(&msg->link); | |
520 | ipmi_free_recv_msg(msg); | |
521 | } | |
522 | } | |
523 | ||
f3ce6a0e CM |
524 | static void free_smi_msg_list(struct list_head *q) |
525 | { | |
526 | struct ipmi_smi_msg *msg, *msg2; | |
527 | ||
528 | list_for_each_entry_safe(msg, msg2, q, link) { | |
529 | list_del(&msg->link); | |
530 | ipmi_free_smi_msg(msg); | |
531 | } | |
532 | } | |
533 | ||
393d2cc3 CM |
534 | static void clean_up_interface_data(ipmi_smi_t intf) |
535 | { | |
536 | int i; | |
537 | struct cmd_rcvr *rcvr, *rcvr2; | |
393d2cc3 CM |
538 | struct list_head list; |
539 | ||
7adf579c CM |
540 | tasklet_kill(&intf->recv_tasklet); |
541 | ||
65be7544 | 542 | free_smi_msg_list(&intf->waiting_rcv_msgs); |
393d2cc3 CM |
543 | free_recv_msg_list(&intf->waiting_events); |
544 | ||
78ba2faf CM |
545 | /* |
546 | * Wholesale remove all the entries from the list in the | |
547 | * interface and wait for RCU to know that none are in use. | |
548 | */ | |
d6dfd131 | 549 | mutex_lock(&intf->cmd_rcvrs_mutex); |
78ba2faf CM |
550 | INIT_LIST_HEAD(&list); |
551 | list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu); | |
d6dfd131 | 552 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
553 | |
554 | list_for_each_entry_safe(rcvr, rcvr2, &list, link) | |
555 | kfree(rcvr); | |
556 | ||
557 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { | |
558 | if ((intf->seq_table[i].inuse) | |
c70d7499 | 559 | && (intf->seq_table[i].recv_msg)) |
393d2cc3 | 560 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
393d2cc3 CM |
561 | } |
562 | } | |
563 | ||
564 | static void intf_free(struct kref *ref) | |
565 | { | |
566 | ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount); | |
567 | ||
568 | clean_up_interface_data(intf); | |
569 | kfree(intf); | |
570 | } | |
571 | ||
bca0324d | 572 | struct watcher_entry { |
b2c03941 CM |
573 | int intf_num; |
574 | ipmi_smi_t intf; | |
bca0324d | 575 | struct list_head link; |
bca0324d CM |
576 | }; |
577 | ||
1da177e4 LT |
578 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher) |
579 | { | |
bca0324d | 580 | ipmi_smi_t intf; |
e381d1c4 | 581 | LIST_HEAD(to_deliver); |
bca0324d CM |
582 | struct watcher_entry *e, *e2; |
583 | ||
b2c03941 CM |
584 | mutex_lock(&smi_watchers_mutex); |
585 | ||
bca0324d CM |
586 | mutex_lock(&ipmi_interfaces_mutex); |
587 | ||
b2c03941 | 588 | /* Build a list of things to deliver. */ |
78ba2faf | 589 | list_for_each_entry(intf, &ipmi_interfaces, link) { |
bca0324d CM |
590 | if (intf->intf_num == -1) |
591 | continue; | |
592 | e = kmalloc(sizeof(*e), GFP_KERNEL); | |
593 | if (!e) | |
594 | goto out_err; | |
b2c03941 CM |
595 | kref_get(&intf->refcount); |
596 | e->intf = intf; | |
bca0324d CM |
597 | e->intf_num = intf->intf_num; |
598 | list_add_tail(&e->link, &to_deliver); | |
599 | } | |
1da177e4 | 600 | |
b2c03941 CM |
601 | /* We will succeed, so add it to the list. */ |
602 | list_add(&watcher->link, &smi_watchers); | |
bca0324d CM |
603 | |
604 | mutex_unlock(&ipmi_interfaces_mutex); | |
605 | ||
606 | list_for_each_entry_safe(e, e2, &to_deliver, link) { | |
607 | list_del(&e->link); | |
b2c03941 CM |
608 | watcher->new_smi(e->intf_num, e->intf->si_dev); |
609 | kref_put(&e->intf->refcount, intf_free); | |
bca0324d | 610 | kfree(e); |
1da177e4 | 611 | } |
bca0324d | 612 | |
b2c03941 | 613 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 614 | |
1da177e4 | 615 | return 0; |
bca0324d CM |
616 | |
617 | out_err: | |
b2c03941 CM |
618 | mutex_unlock(&ipmi_interfaces_mutex); |
619 | mutex_unlock(&smi_watchers_mutex); | |
bca0324d CM |
620 | list_for_each_entry_safe(e, e2, &to_deliver, link) { |
621 | list_del(&e->link); | |
b2c03941 | 622 | kref_put(&e->intf->refcount, intf_free); |
bca0324d CM |
623 | kfree(e); |
624 | } | |
625 | return -ENOMEM; | |
1da177e4 | 626 | } |
c70d7499 | 627 | EXPORT_SYMBOL(ipmi_smi_watcher_register); |
1da177e4 LT |
628 | |
629 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher) | |
630 | { | |
b2c03941 | 631 | mutex_lock(&smi_watchers_mutex); |
1da177e4 | 632 | list_del(&(watcher->link)); |
b2c03941 | 633 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
634 | return 0; |
635 | } | |
c70d7499 | 636 | EXPORT_SYMBOL(ipmi_smi_watcher_unregister); |
1da177e4 | 637 | |
b2c03941 CM |
638 | /* |
639 | * Must be called with smi_watchers_mutex held. | |
640 | */ | |
1da177e4 | 641 | static void |
50c812b2 | 642 | call_smi_watchers(int i, struct device *dev) |
1da177e4 LT |
643 | { |
644 | struct ipmi_smi_watcher *w; | |
645 | ||
1da177e4 LT |
646 | list_for_each_entry(w, &smi_watchers, link) { |
647 | if (try_module_get(w->owner)) { | |
50c812b2 | 648 | w->new_smi(i, dev); |
1da177e4 LT |
649 | module_put(w->owner); |
650 | } | |
651 | } | |
1da177e4 LT |
652 | } |
653 | ||
654 | static int | |
655 | ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) | |
656 | { | |
657 | if (addr1->addr_type != addr2->addr_type) | |
658 | return 0; | |
659 | ||
660 | if (addr1->channel != addr2->channel) | |
661 | return 0; | |
662 | ||
663 | if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
664 | struct ipmi_system_interface_addr *smi_addr1 | |
665 | = (struct ipmi_system_interface_addr *) addr1; | |
666 | struct ipmi_system_interface_addr *smi_addr2 | |
667 | = (struct ipmi_system_interface_addr *) addr2; | |
668 | return (smi_addr1->lun == smi_addr2->lun); | |
669 | } | |
670 | ||
25176ed6 | 671 | if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { |
1da177e4 LT |
672 | struct ipmi_ipmb_addr *ipmb_addr1 |
673 | = (struct ipmi_ipmb_addr *) addr1; | |
674 | struct ipmi_ipmb_addr *ipmb_addr2 | |
675 | = (struct ipmi_ipmb_addr *) addr2; | |
676 | ||
677 | return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr) | |
678 | && (ipmb_addr1->lun == ipmb_addr2->lun)); | |
679 | } | |
680 | ||
25176ed6 | 681 | if (is_lan_addr(addr1)) { |
1da177e4 LT |
682 | struct ipmi_lan_addr *lan_addr1 |
683 | = (struct ipmi_lan_addr *) addr1; | |
684 | struct ipmi_lan_addr *lan_addr2 | |
685 | = (struct ipmi_lan_addr *) addr2; | |
686 | ||
687 | return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID) | |
688 | && (lan_addr1->local_SWID == lan_addr2->local_SWID) | |
689 | && (lan_addr1->session_handle | |
690 | == lan_addr2->session_handle) | |
691 | && (lan_addr1->lun == lan_addr2->lun)); | |
692 | } | |
693 | ||
694 | return 1; | |
695 | } | |
696 | ||
697 | int ipmi_validate_addr(struct ipmi_addr *addr, int len) | |
698 | { | |
c70d7499 | 699 | if (len < sizeof(struct ipmi_system_interface_addr)) |
1da177e4 | 700 | return -EINVAL; |
1da177e4 LT |
701 | |
702 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
703 | if (addr->channel != IPMI_BMC_CHANNEL) | |
704 | return -EINVAL; | |
705 | return 0; | |
706 | } | |
707 | ||
708 | if ((addr->channel == IPMI_BMC_CHANNEL) | |
12fc1d7b | 709 | || (addr->channel >= IPMI_MAX_CHANNELS) |
1da177e4 LT |
710 | || (addr->channel < 0)) |
711 | return -EINVAL; | |
712 | ||
25176ed6 | 713 | if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
c70d7499 | 714 | if (len < sizeof(struct ipmi_ipmb_addr)) |
1da177e4 | 715 | return -EINVAL; |
1da177e4 LT |
716 | return 0; |
717 | } | |
718 | ||
25176ed6 | 719 | if (is_lan_addr(addr)) { |
c70d7499 | 720 | if (len < sizeof(struct ipmi_lan_addr)) |
1da177e4 | 721 | return -EINVAL; |
1da177e4 LT |
722 | return 0; |
723 | } | |
724 | ||
725 | return -EINVAL; | |
726 | } | |
c70d7499 | 727 | EXPORT_SYMBOL(ipmi_validate_addr); |
1da177e4 LT |
728 | |
729 | unsigned int ipmi_addr_length(int addr_type) | |
730 | { | |
731 | if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
732 | return sizeof(struct ipmi_system_interface_addr); | |
733 | ||
734 | if ((addr_type == IPMI_IPMB_ADDR_TYPE) | |
c70d7499 | 735 | || (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) |
1da177e4 | 736 | return sizeof(struct ipmi_ipmb_addr); |
1da177e4 LT |
737 | |
738 | if (addr_type == IPMI_LAN_ADDR_TYPE) | |
739 | return sizeof(struct ipmi_lan_addr); | |
740 | ||
741 | return 0; | |
742 | } | |
c70d7499 | 743 | EXPORT_SYMBOL(ipmi_addr_length); |
1da177e4 LT |
744 | |
745 | static void deliver_response(struct ipmi_recv_msg *msg) | |
746 | { | |
8a3628d5 | 747 | if (!msg->user) { |
56a55ec6 | 748 | ipmi_smi_t intf = msg->user_msg_data; |
56a55ec6 CM |
749 | |
750 | /* Special handling for NULL users. */ | |
751 | if (intf->null_user_handler) { | |
752 | intf->null_user_handler(intf, msg); | |
b2655f26 | 753 | ipmi_inc_stat(intf, handled_local_responses); |
56a55ec6 CM |
754 | } else { |
755 | /* No handler, so give up. */ | |
b2655f26 | 756 | ipmi_inc_stat(intf, unhandled_local_responses); |
56a55ec6 CM |
757 | } |
758 | ipmi_free_recv_msg(msg); | |
759 | } else { | |
393d2cc3 CM |
760 | ipmi_user_t user = msg->user; |
761 | user->handler->ipmi_recv_hndl(msg, user->handler_data); | |
56a55ec6 | 762 | } |
1da177e4 LT |
763 | } |
764 | ||
b2c03941 CM |
765 | static void |
766 | deliver_err_response(struct ipmi_recv_msg *msg, int err) | |
767 | { | |
768 | msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
769 | msg->msg_data[0] = err; | |
770 | msg->msg.netfn |= 1; /* Convert to a response. */ | |
771 | msg->msg.data_len = 1; | |
772 | msg->msg.data = msg->msg_data; | |
773 | deliver_response(msg); | |
774 | } | |
775 | ||
c70d7499 CM |
776 | /* |
777 | * Find the next sequence number not being used and add the given | |
778 | * message with the given timeout to the sequence table. This must be | |
779 | * called with the interface's seq_lock held. | |
780 | */ | |
1da177e4 LT |
781 | static int intf_next_seq(ipmi_smi_t intf, |
782 | struct ipmi_recv_msg *recv_msg, | |
783 | unsigned long timeout, | |
784 | int retries, | |
785 | int broadcast, | |
786 | unsigned char *seq, | |
787 | long *seqid) | |
788 | { | |
789 | int rv = 0; | |
790 | unsigned int i; | |
791 | ||
c70d7499 CM |
792 | for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq; |
793 | i = (i+1)%IPMI_IPMB_NUM_SEQ) { | |
8a3628d5 | 794 | if (!intf->seq_table[i].inuse) |
1da177e4 LT |
795 | break; |
796 | } | |
797 | ||
8a3628d5 | 798 | if (!intf->seq_table[i].inuse) { |
1da177e4 LT |
799 | intf->seq_table[i].recv_msg = recv_msg; |
800 | ||
c70d7499 CM |
801 | /* |
802 | * Start with the maximum timeout, when the send response | |
803 | * comes in we will start the real timer. | |
804 | */ | |
1da177e4 LT |
805 | intf->seq_table[i].timeout = MAX_MSG_TIMEOUT; |
806 | intf->seq_table[i].orig_timeout = timeout; | |
807 | intf->seq_table[i].retries_left = retries; | |
808 | intf->seq_table[i].broadcast = broadcast; | |
809 | intf->seq_table[i].inuse = 1; | |
810 | intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid); | |
811 | *seq = i; | |
812 | *seqid = intf->seq_table[i].seqid; | |
813 | intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; | |
89986496 | 814 | need_waiter(intf); |
1da177e4 LT |
815 | } else { |
816 | rv = -EAGAIN; | |
817 | } | |
c70d7499 | 818 | |
1da177e4 LT |
819 | return rv; |
820 | } | |
821 | ||
c70d7499 CM |
822 | /* |
823 | * Return the receive message for the given sequence number and | |
824 | * release the sequence number so it can be reused. Some other data | |
825 | * is passed in to be sure the message matches up correctly (to help | |
826 | * guard against message coming in after their timeout and the | |
827 | * sequence number being reused). | |
828 | */ | |
1da177e4 LT |
829 | static int intf_find_seq(ipmi_smi_t intf, |
830 | unsigned char seq, | |
831 | short channel, | |
832 | unsigned char cmd, | |
833 | unsigned char netfn, | |
834 | struct ipmi_addr *addr, | |
835 | struct ipmi_recv_msg **recv_msg) | |
836 | { | |
837 | int rv = -ENODEV; | |
838 | unsigned long flags; | |
839 | ||
840 | if (seq >= IPMI_IPMB_NUM_SEQ) | |
841 | return -EINVAL; | |
842 | ||
843 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
844 | if (intf->seq_table[seq].inuse) { | |
845 | struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg; | |
846 | ||
c70d7499 CM |
847 | if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd) |
848 | && (msg->msg.netfn == netfn) | |
849 | && (ipmi_addr_equal(addr, &(msg->addr)))) { | |
1da177e4 LT |
850 | *recv_msg = msg; |
851 | intf->seq_table[seq].inuse = 0; | |
852 | rv = 0; | |
853 | } | |
854 | } | |
855 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
856 | ||
857 | return rv; | |
858 | } | |
859 | ||
860 | ||
861 | /* Start the timer for a specific sequence table entry. */ | |
862 | static int intf_start_seq_timer(ipmi_smi_t intf, | |
863 | long msgid) | |
864 | { | |
865 | int rv = -ENODEV; | |
866 | unsigned long flags; | |
867 | unsigned char seq; | |
868 | unsigned long seqid; | |
869 | ||
870 | ||
871 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
872 | ||
873 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
874 | /* |
875 | * We do this verification because the user can be deleted | |
876 | * while a message is outstanding. | |
877 | */ | |
1da177e4 | 878 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 879 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
880 | struct seq_table *ent = &(intf->seq_table[seq]); |
881 | ent->timeout = ent->orig_timeout; | |
882 | rv = 0; | |
883 | } | |
884 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
885 | ||
886 | return rv; | |
887 | } | |
888 | ||
889 | /* Got an error for the send message for a specific sequence number. */ | |
890 | static int intf_err_seq(ipmi_smi_t intf, | |
891 | long msgid, | |
892 | unsigned int err) | |
893 | { | |
894 | int rv = -ENODEV; | |
895 | unsigned long flags; | |
896 | unsigned char seq; | |
897 | unsigned long seqid; | |
898 | struct ipmi_recv_msg *msg = NULL; | |
899 | ||
900 | ||
901 | GET_SEQ_FROM_MSGID(msgid, seq, seqid); | |
902 | ||
903 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
c70d7499 CM |
904 | /* |
905 | * We do this verification because the user can be deleted | |
906 | * while a message is outstanding. | |
907 | */ | |
1da177e4 | 908 | if ((intf->seq_table[seq].inuse) |
c70d7499 | 909 | && (intf->seq_table[seq].seqid == seqid)) { |
1da177e4 LT |
910 | struct seq_table *ent = &(intf->seq_table[seq]); |
911 | ||
912 | ent->inuse = 0; | |
913 | msg = ent->recv_msg; | |
914 | rv = 0; | |
915 | } | |
916 | spin_unlock_irqrestore(&(intf->seq_lock), flags); | |
917 | ||
b2c03941 CM |
918 | if (msg) |
919 | deliver_err_response(msg, err); | |
1da177e4 LT |
920 | |
921 | return rv; | |
922 | } | |
923 | ||
924 | ||
925 | int ipmi_create_user(unsigned int if_num, | |
926 | struct ipmi_user_hndl *handler, | |
927 | void *handler_data, | |
928 | ipmi_user_t *user) | |
929 | { | |
930 | unsigned long flags; | |
931 | ipmi_user_t new_user; | |
932 | int rv = 0; | |
933 | ipmi_smi_t intf; | |
934 | ||
c70d7499 CM |
935 | /* |
936 | * There is no module usecount here, because it's not | |
937 | * required. Since this can only be used by and called from | |
938 | * other modules, they will implicitly use this module, and | |
939 | * thus this can't be removed unless the other modules are | |
940 | * removed. | |
941 | */ | |
1da177e4 LT |
942 | |
943 | if (handler == NULL) | |
944 | return -EINVAL; | |
945 | ||
c70d7499 CM |
946 | /* |
947 | * Make sure the driver is actually initialized, this handles | |
948 | * problems with initialization order. | |
949 | */ | |
1da177e4 LT |
950 | if (!initialized) { |
951 | rv = ipmi_init_msghandler(); | |
952 | if (rv) | |
953 | return rv; | |
954 | ||
c70d7499 CM |
955 | /* |
956 | * The init code doesn't return an error if it was turned | |
957 | * off, but it won't initialize. Check that. | |
958 | */ | |
1da177e4 LT |
959 | if (!initialized) |
960 | return -ENODEV; | |
961 | } | |
962 | ||
963 | new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); | |
8a3628d5 | 964 | if (!new_user) |
1da177e4 LT |
965 | return -ENOMEM; |
966 | ||
b2c03941 | 967 | mutex_lock(&ipmi_interfaces_mutex); |
bca0324d CM |
968 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
969 | if (intf->intf_num == if_num) | |
970 | goto found; | |
1da177e4 | 971 | } |
b2c03941 | 972 | /* Not found, return an error */ |
bca0324d CM |
973 | rv = -EINVAL; |
974 | goto out_kfree; | |
1da177e4 | 975 | |
bca0324d | 976 | found: |
393d2cc3 CM |
977 | /* Note that each existing user holds a refcount to the interface. */ |
978 | kref_get(&intf->refcount); | |
1da177e4 | 979 | |
393d2cc3 | 980 | kref_init(&new_user->refcount); |
1da177e4 LT |
981 | new_user->handler = handler; |
982 | new_user->handler_data = handler_data; | |
983 | new_user->intf = intf; | |
89986496 | 984 | new_user->gets_events = false; |
1da177e4 LT |
985 | |
986 | if (!try_module_get(intf->handlers->owner)) { | |
987 | rv = -ENODEV; | |
5c98d29a | 988 | goto out_kref; |
1da177e4 LT |
989 | } |
990 | ||
991 | if (intf->handlers->inc_usecount) { | |
992 | rv = intf->handlers->inc_usecount(intf->send_info); | |
993 | if (rv) { | |
994 | module_put(intf->handlers->owner); | |
5c98d29a | 995 | goto out_kref; |
1da177e4 LT |
996 | } |
997 | } | |
998 | ||
c70d7499 CM |
999 | /* |
1000 | * Hold the lock so intf->handlers is guaranteed to be good | |
1001 | * until now | |
1002 | */ | |
b2c03941 CM |
1003 | mutex_unlock(&ipmi_interfaces_mutex); |
1004 | ||
7aefac26 | 1005 | new_user->valid = true; |
393d2cc3 CM |
1006 | spin_lock_irqsave(&intf->seq_lock, flags); |
1007 | list_add_rcu(&new_user->link, &intf->users); | |
1008 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
89986496 CM |
1009 | if (handler->ipmi_watchdog_pretimeout) { |
1010 | /* User wants pretimeouts, so make sure to watch for them. */ | |
1011 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1012 | need_waiter(intf); | |
1013 | } | |
393d2cc3 CM |
1014 | *user = new_user; |
1015 | return 0; | |
1da177e4 | 1016 | |
5c98d29a | 1017 | out_kref: |
393d2cc3 | 1018 | kref_put(&intf->refcount, intf_free); |
5c98d29a | 1019 | out_kfree: |
b2c03941 | 1020 | mutex_unlock(&ipmi_interfaces_mutex); |
5c98d29a | 1021 | kfree(new_user); |
1da177e4 LT |
1022 | return rv; |
1023 | } | |
c70d7499 | 1024 | EXPORT_SYMBOL(ipmi_create_user); |
1da177e4 | 1025 | |
16f4232c ZY |
1026 | int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data) |
1027 | { | |
1028 | int rv = 0; | |
1029 | ipmi_smi_t intf; | |
1030 | struct ipmi_smi_handlers *handlers; | |
1031 | ||
1032 | mutex_lock(&ipmi_interfaces_mutex); | |
1033 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1034 | if (intf->intf_num == if_num) | |
1035 | goto found; | |
1036 | } | |
1037 | /* Not found, return an error */ | |
1038 | rv = -EINVAL; | |
1039 | mutex_unlock(&ipmi_interfaces_mutex); | |
1040 | return rv; | |
1041 | ||
1042 | found: | |
1043 | handlers = intf->handlers; | |
1044 | rv = -ENOSYS; | |
1045 | if (handlers->get_smi_info) | |
1046 | rv = handlers->get_smi_info(intf->send_info, data); | |
1047 | mutex_unlock(&ipmi_interfaces_mutex); | |
1048 | ||
1049 | return rv; | |
1050 | } | |
1051 | EXPORT_SYMBOL(ipmi_get_smi_info); | |
1052 | ||
393d2cc3 CM |
1053 | static void free_user(struct kref *ref) |
1054 | { | |
1055 | ipmi_user_t user = container_of(ref, struct ipmi_user, refcount); | |
1056 | kfree(user); | |
1057 | } | |
1058 | ||
1059 | int ipmi_destroy_user(ipmi_user_t user) | |
1da177e4 | 1060 | { |
393d2cc3 | 1061 | ipmi_smi_t intf = user->intf; |
1da177e4 LT |
1062 | int i; |
1063 | unsigned long flags; | |
393d2cc3 | 1064 | struct cmd_rcvr *rcvr; |
393d2cc3 | 1065 | struct cmd_rcvr *rcvrs = NULL; |
1da177e4 | 1066 | |
7aefac26 | 1067 | user->valid = false; |
1da177e4 | 1068 | |
89986496 CM |
1069 | if (user->handler->ipmi_watchdog_pretimeout) |
1070 | atomic_dec(&intf->event_waiters); | |
1071 | ||
1072 | if (user->gets_events) | |
1073 | atomic_dec(&intf->event_waiters); | |
1074 | ||
393d2cc3 CM |
1075 | /* Remove the user from the interface's sequence table. */ |
1076 | spin_lock_irqsave(&intf->seq_lock, flags); | |
1077 | list_del_rcu(&user->link); | |
1da177e4 | 1078 | |
e8b33617 | 1079 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
393d2cc3 | 1080 | if (intf->seq_table[i].inuse |
c70d7499 | 1081 | && (intf->seq_table[i].recv_msg->user == user)) { |
393d2cc3 | 1082 | intf->seq_table[i].inuse = 0; |
b2c03941 | 1083 | ipmi_free_recv_msg(intf->seq_table[i].recv_msg); |
1da177e4 LT |
1084 | } |
1085 | } | |
393d2cc3 CM |
1086 | spin_unlock_irqrestore(&intf->seq_lock, flags); |
1087 | ||
1088 | /* | |
1089 | * Remove the user from the command receiver's table. First | |
1090 | * we build a list of everything (not using the standard link, | |
1091 | * since other things may be using it till we do | |
1092 | * synchronize_rcu()) then free everything in that list. | |
1093 | */ | |
d6dfd131 | 1094 | mutex_lock(&intf->cmd_rcvrs_mutex); |
066bb8d0 | 1095 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { |
1da177e4 | 1096 | if (rcvr->user == user) { |
393d2cc3 CM |
1097 | list_del_rcu(&rcvr->link); |
1098 | rcvr->next = rcvrs; | |
1099 | rcvrs = rcvr; | |
1da177e4 LT |
1100 | } |
1101 | } | |
d6dfd131 | 1102 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
393d2cc3 CM |
1103 | synchronize_rcu(); |
1104 | while (rcvrs) { | |
1105 | rcvr = rcvrs; | |
1106 | rcvrs = rcvr->next; | |
1107 | kfree(rcvr); | |
1108 | } | |
1da177e4 | 1109 | |
b2c03941 CM |
1110 | mutex_lock(&ipmi_interfaces_mutex); |
1111 | if (intf->handlers) { | |
1112 | module_put(intf->handlers->owner); | |
1113 | if (intf->handlers->dec_usecount) | |
1114 | intf->handlers->dec_usecount(intf->send_info); | |
1115 | } | |
1116 | mutex_unlock(&ipmi_interfaces_mutex); | |
1da177e4 | 1117 | |
393d2cc3 | 1118 | kref_put(&intf->refcount, intf_free); |
1da177e4 | 1119 | |
393d2cc3 | 1120 | kref_put(&user->refcount, free_user); |
1da177e4 | 1121 | |
8a3628d5 | 1122 | return 0; |
1da177e4 | 1123 | } |
c70d7499 | 1124 | EXPORT_SYMBOL(ipmi_destroy_user); |
1da177e4 LT |
1125 | |
1126 | void ipmi_get_version(ipmi_user_t user, | |
1127 | unsigned char *major, | |
1128 | unsigned char *minor) | |
1129 | { | |
b2c03941 CM |
1130 | *major = user->intf->ipmi_version_major; |
1131 | *minor = user->intf->ipmi_version_minor; | |
1da177e4 | 1132 | } |
c70d7499 | 1133 | EXPORT_SYMBOL(ipmi_get_version); |
1da177e4 | 1134 | |
c14979b9 CM |
1135 | int ipmi_set_my_address(ipmi_user_t user, |
1136 | unsigned int channel, | |
1137 | unsigned char address) | |
1da177e4 | 1138 | { |
c14979b9 CM |
1139 | if (channel >= IPMI_MAX_CHANNELS) |
1140 | return -EINVAL; | |
1141 | user->intf->channels[channel].address = address; | |
1142 | return 0; | |
1da177e4 | 1143 | } |
c70d7499 | 1144 | EXPORT_SYMBOL(ipmi_set_my_address); |
1da177e4 | 1145 | |
c14979b9 CM |
1146 | int ipmi_get_my_address(ipmi_user_t user, |
1147 | unsigned int channel, | |
1148 | unsigned char *address) | |
1da177e4 | 1149 | { |
c14979b9 CM |
1150 | if (channel >= IPMI_MAX_CHANNELS) |
1151 | return -EINVAL; | |
1152 | *address = user->intf->channels[channel].address; | |
1153 | return 0; | |
1da177e4 | 1154 | } |
c70d7499 | 1155 | EXPORT_SYMBOL(ipmi_get_my_address); |
1da177e4 | 1156 | |
c14979b9 CM |
1157 | int ipmi_set_my_LUN(ipmi_user_t user, |
1158 | unsigned int channel, | |
1159 | unsigned char LUN) | |
1da177e4 | 1160 | { |
c14979b9 CM |
1161 | if (channel >= IPMI_MAX_CHANNELS) |
1162 | return -EINVAL; | |
1163 | user->intf->channels[channel].lun = LUN & 0x3; | |
1164 | return 0; | |
1da177e4 | 1165 | } |
c70d7499 | 1166 | EXPORT_SYMBOL(ipmi_set_my_LUN); |
1da177e4 | 1167 | |
c14979b9 CM |
1168 | int ipmi_get_my_LUN(ipmi_user_t user, |
1169 | unsigned int channel, | |
1170 | unsigned char *address) | |
1da177e4 | 1171 | { |
c14979b9 CM |
1172 | if (channel >= IPMI_MAX_CHANNELS) |
1173 | return -EINVAL; | |
1174 | *address = user->intf->channels[channel].lun; | |
1175 | return 0; | |
1da177e4 | 1176 | } |
c70d7499 | 1177 | EXPORT_SYMBOL(ipmi_get_my_LUN); |
1da177e4 | 1178 | |
b9675136 CM |
1179 | int ipmi_get_maintenance_mode(ipmi_user_t user) |
1180 | { | |
1181 | int mode; | |
1182 | unsigned long flags; | |
1183 | ||
1184 | spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags); | |
1185 | mode = user->intf->maintenance_mode; | |
1186 | spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags); | |
1187 | ||
1188 | return mode; | |
1189 | } | |
1190 | EXPORT_SYMBOL(ipmi_get_maintenance_mode); | |
1191 | ||
1192 | static void maintenance_mode_update(ipmi_smi_t intf) | |
1193 | { | |
1194 | if (intf->handlers->set_maintenance_mode) | |
1195 | intf->handlers->set_maintenance_mode( | |
1196 | intf->send_info, intf->maintenance_mode_enable); | |
1197 | } | |
1198 | ||
1199 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) | |
1200 | { | |
1201 | int rv = 0; | |
1202 | unsigned long flags; | |
1203 | ipmi_smi_t intf = user->intf; | |
1204 | ||
1205 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
1206 | if (intf->maintenance_mode != mode) { | |
1207 | switch (mode) { | |
1208 | case IPMI_MAINTENANCE_MODE_AUTO: | |
b9675136 CM |
1209 | intf->maintenance_mode_enable |
1210 | = (intf->auto_maintenance_timeout > 0); | |
1211 | break; | |
1212 | ||
1213 | case IPMI_MAINTENANCE_MODE_OFF: | |
7aefac26 | 1214 | intf->maintenance_mode_enable = false; |
b9675136 CM |
1215 | break; |
1216 | ||
1217 | case IPMI_MAINTENANCE_MODE_ON: | |
7aefac26 | 1218 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1219 | break; |
1220 | ||
1221 | default: | |
1222 | rv = -EINVAL; | |
1223 | goto out_unlock; | |
1224 | } | |
7aefac26 | 1225 | intf->maintenance_mode = mode; |
b9675136 CM |
1226 | |
1227 | maintenance_mode_update(intf); | |
1228 | } | |
1229 | out_unlock: | |
1230 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags); | |
1231 | ||
1232 | return rv; | |
1233 | } | |
1234 | EXPORT_SYMBOL(ipmi_set_maintenance_mode); | |
1235 | ||
89986496 | 1236 | int ipmi_set_gets_events(ipmi_user_t user, bool val) |
1da177e4 | 1237 | { |
393d2cc3 CM |
1238 | unsigned long flags; |
1239 | ipmi_smi_t intf = user->intf; | |
1240 | struct ipmi_recv_msg *msg, *msg2; | |
1241 | struct list_head msgs; | |
1da177e4 | 1242 | |
393d2cc3 CM |
1243 | INIT_LIST_HEAD(&msgs); |
1244 | ||
1245 | spin_lock_irqsave(&intf->events_lock, flags); | |
89986496 CM |
1246 | if (user->gets_events == val) |
1247 | goto out; | |
1248 | ||
1da177e4 LT |
1249 | user->gets_events = val; |
1250 | ||
89986496 CM |
1251 | if (val) { |
1252 | if (atomic_inc_return(&intf->event_waiters) == 1) | |
1253 | need_waiter(intf); | |
1254 | } else { | |
1255 | atomic_dec(&intf->event_waiters); | |
1256 | } | |
1257 | ||
b2c03941 CM |
1258 | if (intf->delivering_events) |
1259 | /* | |
1260 | * Another thread is delivering events for this, so | |
1261 | * let it handle any new events. | |
1262 | */ | |
1263 | goto out; | |
1264 | ||
1265 | /* Deliver any queued events. */ | |
1266 | while (user->gets_events && !list_empty(&intf->waiting_events)) { | |
179e0917 AM |
1267 | list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link) |
1268 | list_move_tail(&msg->link, &msgs); | |
4791c03d | 1269 | intf->waiting_events_count = 0; |
87ebd06f CM |
1270 | if (intf->event_msg_printed) { |
1271 | printk(KERN_WARNING PFX "Event queue no longer" | |
1272 | " full\n"); | |
1273 | intf->event_msg_printed = 0; | |
1274 | } | |
393d2cc3 | 1275 | |
b2c03941 CM |
1276 | intf->delivering_events = 1; |
1277 | spin_unlock_irqrestore(&intf->events_lock, flags); | |
1278 | ||
1279 | list_for_each_entry_safe(msg, msg2, &msgs, link) { | |
1280 | msg->user = user; | |
1281 | kref_get(&user->refcount); | |
1282 | deliver_response(msg); | |
1283 | } | |
1284 | ||
1285 | spin_lock_irqsave(&intf->events_lock, flags); | |
1286 | intf->delivering_events = 0; | |
393d2cc3 CM |
1287 | } |
1288 | ||
b2c03941 | 1289 | out: |
393d2cc3 | 1290 | spin_unlock_irqrestore(&intf->events_lock, flags); |
1da177e4 LT |
1291 | |
1292 | return 0; | |
1293 | } | |
c70d7499 | 1294 | EXPORT_SYMBOL(ipmi_set_gets_events); |
1da177e4 | 1295 | |
393d2cc3 CM |
1296 | static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf, |
1297 | unsigned char netfn, | |
c69c3127 CM |
1298 | unsigned char cmd, |
1299 | unsigned char chan) | |
393d2cc3 CM |
1300 | { |
1301 | struct cmd_rcvr *rcvr; | |
1302 | ||
1303 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
c69c3127 CM |
1304 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) |
1305 | && (rcvr->chans & (1 << chan))) | |
393d2cc3 CM |
1306 | return rcvr; |
1307 | } | |
1308 | return NULL; | |
1309 | } | |
1310 | ||
c69c3127 CM |
1311 | static int is_cmd_rcvr_exclusive(ipmi_smi_t intf, |
1312 | unsigned char netfn, | |
1313 | unsigned char cmd, | |
1314 | unsigned int chans) | |
1315 | { | |
1316 | struct cmd_rcvr *rcvr; | |
1317 | ||
1318 | list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) { | |
1319 | if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd) | |
1320 | && (rcvr->chans & chans)) | |
1321 | return 0; | |
1322 | } | |
1323 | return 1; | |
1324 | } | |
1325 | ||
1da177e4 LT |
1326 | int ipmi_register_for_cmd(ipmi_user_t user, |
1327 | unsigned char netfn, | |
c69c3127 CM |
1328 | unsigned char cmd, |
1329 | unsigned int chans) | |
1da177e4 | 1330 | { |
393d2cc3 CM |
1331 | ipmi_smi_t intf = user->intf; |
1332 | struct cmd_rcvr *rcvr; | |
393d2cc3 | 1333 | int rv = 0; |
1da177e4 LT |
1334 | |
1335 | ||
1336 | rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL); | |
8a3628d5 | 1337 | if (!rcvr) |
1da177e4 | 1338 | return -ENOMEM; |
393d2cc3 CM |
1339 | rcvr->cmd = cmd; |
1340 | rcvr->netfn = netfn; | |
c69c3127 | 1341 | rcvr->chans = chans; |
393d2cc3 | 1342 | rcvr->user = user; |
1da177e4 | 1343 | |
d6dfd131 | 1344 | mutex_lock(&intf->cmd_rcvrs_mutex); |
1da177e4 | 1345 | /* Make sure the command/netfn is not already registered. */ |
c69c3127 | 1346 | if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) { |
393d2cc3 CM |
1347 | rv = -EBUSY; |
1348 | goto out_unlock; | |
1da177e4 | 1349 | } |
877197ef | 1350 | |
89986496 CM |
1351 | if (atomic_inc_return(&intf->event_waiters) == 1) |
1352 | need_waiter(intf); | |
1353 | ||
393d2cc3 | 1354 | list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); |
1da177e4 | 1355 | |
393d2cc3 | 1356 | out_unlock: |
d6dfd131 | 1357 | mutex_unlock(&intf->cmd_rcvrs_mutex); |
1da177e4 LT |
1358 | if (rv) |
1359 | kfree(rcvr); | |
1360 | ||
1361 | return rv; | |
1362 | } | |
c70d7499 | 1363 | EXPORT_SYMBOL(ipmi_register_for_cmd); |
1da177e4 LT |
1364 | |
1365 | int ipmi_unregister_for_cmd(ipmi_user_t user, | |
1366 | unsigned char netfn, | |
c69c3127 CM |
1367 | unsigned char cmd, |
1368 | unsigned int chans) | |
1da177e4 | 1369 | { |
393d2cc3 CM |
1370 | ipmi_smi_t intf = user->intf; |
1371 | struct cmd_rcvr *rcvr; | |
c69c3127 CM |
1372 | struct cmd_rcvr *rcvrs = NULL; |
1373 | int i, rv = -ENOENT; | |
1da177e4 | 1374 | |
d6dfd131 | 1375 | mutex_lock(&intf->cmd_rcvrs_mutex); |
c69c3127 CM |
1376 | for (i = 0; i < IPMI_NUM_CHANNELS; i++) { |
1377 | if (((1 << i) & chans) == 0) | |
1378 | continue; | |
1379 | rcvr = find_cmd_rcvr(intf, netfn, cmd, i); | |
1380 | if (rcvr == NULL) | |
1381 | continue; | |
1382 | if (rcvr->user == user) { | |
1383 | rv = 0; | |
1384 | rcvr->chans &= ~chans; | |
1385 | if (rcvr->chans == 0) { | |
1386 | list_del_rcu(&rcvr->link); | |
1387 | rcvr->next = rcvrs; | |
1388 | rcvrs = rcvr; | |
1389 | } | |
1390 | } | |
1391 | } | |
1392 | mutex_unlock(&intf->cmd_rcvrs_mutex); | |
1393 | synchronize_rcu(); | |
1394 | while (rcvrs) { | |
89986496 | 1395 | atomic_dec(&intf->event_waiters); |
c69c3127 CM |
1396 | rcvr = rcvrs; |
1397 | rcvrs = rcvr->next; | |
393d2cc3 | 1398 | kfree(rcvr); |
1da177e4 | 1399 | } |
c69c3127 | 1400 | return rv; |
1da177e4 | 1401 | } |
c70d7499 | 1402 | EXPORT_SYMBOL(ipmi_unregister_for_cmd); |
1da177e4 | 1403 | |
1da177e4 LT |
1404 | static unsigned char |
1405 | ipmb_checksum(unsigned char *data, int size) | |
1406 | { | |
1407 | unsigned char csum = 0; | |
c70d7499 | 1408 | |
1da177e4 LT |
1409 | for (; size > 0; size--, data++) |
1410 | csum += *data; | |
1411 | ||
1412 | return -csum; | |
1413 | } | |
1414 | ||
1415 | static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg, | |
1416 | struct kernel_ipmi_msg *msg, | |
1417 | struct ipmi_ipmb_addr *ipmb_addr, | |
1418 | long msgid, | |
1419 | unsigned char ipmb_seq, | |
1420 | int broadcast, | |
1421 | unsigned char source_address, | |
1422 | unsigned char source_lun) | |
1423 | { | |
1424 | int i = broadcast; | |
1425 | ||
1426 | /* Format the IPMB header data. */ | |
1427 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1428 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1429 | smi_msg->data[2] = ipmb_addr->channel; | |
1430 | if (broadcast) | |
1431 | smi_msg->data[3] = 0; | |
1432 | smi_msg->data[i+3] = ipmb_addr->slave_addr; | |
1433 | smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3); | |
1434 | smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2); | |
1435 | smi_msg->data[i+6] = source_address; | |
1436 | smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun; | |
1437 | smi_msg->data[i+8] = msg->cmd; | |
1438 | ||
1439 | /* Now tack on the data to the message. */ | |
1440 | if (msg->data_len > 0) | |
1441 | memcpy(&(smi_msg->data[i+9]), msg->data, | |
1442 | msg->data_len); | |
1443 | smi_msg->data_size = msg->data_len + 9; | |
1444 | ||
1445 | /* Now calculate the checksum and tack it on. */ | |
1446 | smi_msg->data[i+smi_msg->data_size] | |
1447 | = ipmb_checksum(&(smi_msg->data[i+6]), | |
1448 | smi_msg->data_size-6); | |
1449 | ||
c70d7499 CM |
1450 | /* |
1451 | * Add on the checksum size and the offset from the | |
1452 | * broadcast. | |
1453 | */ | |
1da177e4 LT |
1454 | smi_msg->data_size += 1 + i; |
1455 | ||
1456 | smi_msg->msgid = msgid; | |
1457 | } | |
1458 | ||
1459 | static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg, | |
1460 | struct kernel_ipmi_msg *msg, | |
1461 | struct ipmi_lan_addr *lan_addr, | |
1462 | long msgid, | |
1463 | unsigned char ipmb_seq, | |
1464 | unsigned char source_lun) | |
1465 | { | |
1466 | /* Format the IPMB header data. */ | |
1467 | smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
1468 | smi_msg->data[1] = IPMI_SEND_MSG_CMD; | |
1469 | smi_msg->data[2] = lan_addr->channel; | |
1470 | smi_msg->data[3] = lan_addr->session_handle; | |
1471 | smi_msg->data[4] = lan_addr->remote_SWID; | |
1472 | smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3); | |
1473 | smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2); | |
1474 | smi_msg->data[7] = lan_addr->local_SWID; | |
1475 | smi_msg->data[8] = (ipmb_seq << 2) | source_lun; | |
1476 | smi_msg->data[9] = msg->cmd; | |
1477 | ||
1478 | /* Now tack on the data to the message. */ | |
1479 | if (msg->data_len > 0) | |
1480 | memcpy(&(smi_msg->data[10]), msg->data, | |
1481 | msg->data_len); | |
1482 | smi_msg->data_size = msg->data_len + 10; | |
1483 | ||
1484 | /* Now calculate the checksum and tack it on. */ | |
1485 | smi_msg->data[smi_msg->data_size] | |
1486 | = ipmb_checksum(&(smi_msg->data[7]), | |
1487 | smi_msg->data_size-7); | |
1488 | ||
c70d7499 CM |
1489 | /* |
1490 | * Add on the checksum size and the offset from the | |
1491 | * broadcast. | |
1492 | */ | |
1da177e4 LT |
1493 | smi_msg->data_size += 1; |
1494 | ||
1495 | smi_msg->msgid = msgid; | |
1496 | } | |
1497 | ||
7f4a1c84 CM |
1498 | static void smi_send(ipmi_smi_t intf, struct ipmi_smi_handlers *handlers, |
1499 | struct ipmi_smi_msg *smi_msg, int priority) | |
1500 | { | |
7ea0ed2b CM |
1501 | int run_to_completion = intf->run_to_completion; |
1502 | unsigned long flags; | |
1503 | ||
1504 | if (!run_to_completion) | |
1505 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
1506 | if (intf->curr_msg) { | |
1507 | if (priority > 0) | |
1508 | list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs); | |
1509 | else | |
1510 | list_add_tail(&smi_msg->link, &intf->xmit_msgs); | |
1511 | smi_msg = NULL; | |
1512 | } else { | |
1513 | intf->curr_msg = smi_msg; | |
1514 | } | |
1515 | if (!run_to_completion) | |
1516 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
1517 | ||
1518 | if (smi_msg) | |
1519 | handlers->sender(intf->send_info, smi_msg, 0); | |
7f4a1c84 CM |
1520 | } |
1521 | ||
c70d7499 CM |
1522 | /* |
1523 | * Separate from ipmi_request so that the user does not have to be | |
1524 | * supplied in certain circumstances (mainly at panic time). If | |
1525 | * messages are supplied, they will be freed, even if an error | |
1526 | * occurs. | |
1527 | */ | |
393d2cc3 CM |
1528 | static int i_ipmi_request(ipmi_user_t user, |
1529 | ipmi_smi_t intf, | |
1530 | struct ipmi_addr *addr, | |
1531 | long msgid, | |
1532 | struct kernel_ipmi_msg *msg, | |
1533 | void *user_msg_data, | |
1534 | void *supplied_smi, | |
1535 | struct ipmi_recv_msg *supplied_recv, | |
1536 | int priority, | |
1537 | unsigned char source_address, | |
1538 | unsigned char source_lun, | |
1539 | int retries, | |
1540 | unsigned int retry_time_ms) | |
1da177e4 | 1541 | { |
b2c03941 CM |
1542 | int rv = 0; |
1543 | struct ipmi_smi_msg *smi_msg; | |
1544 | struct ipmi_recv_msg *recv_msg; | |
1545 | unsigned long flags; | |
1da177e4 LT |
1546 | |
1547 | ||
c70d7499 | 1548 | if (supplied_recv) |
1da177e4 | 1549 | recv_msg = supplied_recv; |
c70d7499 | 1550 | else { |
1da177e4 | 1551 | recv_msg = ipmi_alloc_recv_msg(); |
c70d7499 | 1552 | if (recv_msg == NULL) |
1da177e4 | 1553 | return -ENOMEM; |
1da177e4 LT |
1554 | } |
1555 | recv_msg->user_msg_data = user_msg_data; | |
1556 | ||
c70d7499 | 1557 | if (supplied_smi) |
1da177e4 | 1558 | smi_msg = (struct ipmi_smi_msg *) supplied_smi; |
c70d7499 | 1559 | else { |
1da177e4 LT |
1560 | smi_msg = ipmi_alloc_smi_msg(); |
1561 | if (smi_msg == NULL) { | |
1562 | ipmi_free_recv_msg(recv_msg); | |
1563 | return -ENOMEM; | |
1564 | } | |
1565 | } | |
1566 | ||
b2c03941 | 1567 | rcu_read_lock(); |
7ea0ed2b | 1568 | if (intf->in_shutdown) { |
b2c03941 CM |
1569 | rv = -ENODEV; |
1570 | goto out_err; | |
1571 | } | |
1572 | ||
1da177e4 | 1573 | recv_msg->user = user; |
393d2cc3 CM |
1574 | if (user) |
1575 | kref_get(&user->refcount); | |
1da177e4 | 1576 | recv_msg->msgid = msgid; |
c70d7499 CM |
1577 | /* |
1578 | * Store the message to send in the receive message so timeout | |
1579 | * responses can get the proper response data. | |
1580 | */ | |
1da177e4 LT |
1581 | recv_msg->msg = *msg; |
1582 | ||
1583 | if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { | |
1584 | struct ipmi_system_interface_addr *smi_addr; | |
1585 | ||
1586 | if (msg->netfn & 1) { | |
1587 | /* Responses are not allowed to the SMI. */ | |
1588 | rv = -EINVAL; | |
1589 | goto out_err; | |
1590 | } | |
1591 | ||
1592 | smi_addr = (struct ipmi_system_interface_addr *) addr; | |
1593 | if (smi_addr->lun > 3) { | |
b2655f26 | 1594 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1595 | rv = -EINVAL; |
1596 | goto out_err; | |
1597 | } | |
1598 | ||
1599 | memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr)); | |
1600 | ||
1601 | if ((msg->netfn == IPMI_NETFN_APP_REQUEST) | |
1602 | && ((msg->cmd == IPMI_SEND_MSG_CMD) | |
1603 | || (msg->cmd == IPMI_GET_MSG_CMD) | |
c70d7499 CM |
1604 | || (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) { |
1605 | /* | |
1606 | * We don't let the user do these, since we manage | |
1607 | * the sequence numbers. | |
1608 | */ | |
b2655f26 | 1609 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1610 | rv = -EINVAL; |
1611 | goto out_err; | |
1612 | } | |
1613 | ||
b9675136 CM |
1614 | if (((msg->netfn == IPMI_NETFN_APP_REQUEST) |
1615 | && ((msg->cmd == IPMI_COLD_RESET_CMD) | |
1616 | || (msg->cmd == IPMI_WARM_RESET_CMD))) | |
c70d7499 | 1617 | || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) { |
b9675136 CM |
1618 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); |
1619 | intf->auto_maintenance_timeout | |
1620 | = IPMI_MAINTENANCE_MODE_TIMEOUT; | |
1621 | if (!intf->maintenance_mode | |
c70d7499 | 1622 | && !intf->maintenance_mode_enable) { |
7aefac26 | 1623 | intf->maintenance_mode_enable = true; |
b9675136 CM |
1624 | maintenance_mode_update(intf); |
1625 | } | |
1626 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, | |
1627 | flags); | |
1628 | } | |
1629 | ||
1da177e4 | 1630 | if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1631 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1632 | rv = -EMSGSIZE; |
1633 | goto out_err; | |
1634 | } | |
1635 | ||
1636 | smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3); | |
1637 | smi_msg->data[1] = msg->cmd; | |
1638 | smi_msg->msgid = msgid; | |
1639 | smi_msg->user_data = recv_msg; | |
1640 | if (msg->data_len > 0) | |
1641 | memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); | |
1642 | smi_msg->data_size = msg->data_len + 2; | |
b2655f26 | 1643 | ipmi_inc_stat(intf, sent_local_commands); |
25176ed6 | 1644 | } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { |
1da177e4 LT |
1645 | struct ipmi_ipmb_addr *ipmb_addr; |
1646 | unsigned char ipmb_seq; | |
1647 | long seqid; | |
1648 | int broadcast = 0; | |
1649 | ||
9c101fd4 | 1650 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1651 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1652 | rv = -EINVAL; |
1653 | goto out_err; | |
1654 | } | |
1655 | ||
1656 | if (intf->channels[addr->channel].medium | |
c70d7499 | 1657 | != IPMI_CHANNEL_MEDIUM_IPMB) { |
b2655f26 | 1658 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1659 | rv = -EINVAL; |
1660 | goto out_err; | |
1661 | } | |
1662 | ||
1663 | if (retries < 0) { | |
1664 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) | |
1665 | retries = 0; /* Don't retry broadcasts. */ | |
1666 | else | |
1667 | retries = 4; | |
1668 | } | |
1669 | if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) { | |
c70d7499 CM |
1670 | /* |
1671 | * Broadcasts add a zero at the beginning of the | |
1672 | * message, but otherwise is the same as an IPMB | |
1673 | * address. | |
1674 | */ | |
1da177e4 LT |
1675 | addr->addr_type = IPMI_IPMB_ADDR_TYPE; |
1676 | broadcast = 1; | |
1677 | } | |
1678 | ||
1679 | ||
1680 | /* Default to 1 second retries. */ | |
1681 | if (retry_time_ms == 0) | |
1682 | retry_time_ms = 1000; | |
1683 | ||
c70d7499 CM |
1684 | /* |
1685 | * 9 for the header and 1 for the checksum, plus | |
1686 | * possibly one for the broadcast. | |
1687 | */ | |
1da177e4 | 1688 | if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) { |
b2655f26 | 1689 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1690 | rv = -EMSGSIZE; |
1691 | goto out_err; | |
1692 | } | |
1693 | ||
1694 | ipmb_addr = (struct ipmi_ipmb_addr *) addr; | |
1695 | if (ipmb_addr->lun > 3) { | |
b2655f26 | 1696 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1697 | rv = -EINVAL; |
1698 | goto out_err; | |
1699 | } | |
1700 | ||
1701 | memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr)); | |
1702 | ||
1703 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1704 | /* |
1705 | * It's a response, so use the user's sequence | |
1706 | * from msgid. | |
1707 | */ | |
b2655f26 | 1708 | ipmi_inc_stat(intf, sent_ipmb_responses); |
1da177e4 LT |
1709 | format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid, |
1710 | msgid, broadcast, | |
1711 | source_address, source_lun); | |
1712 | ||
c70d7499 CM |
1713 | /* |
1714 | * Save the receive message so we can use it | |
1715 | * to deliver the response. | |
1716 | */ | |
1da177e4 LT |
1717 | smi_msg->user_data = recv_msg; |
1718 | } else { | |
1719 | /* It's a command, so get a sequence for it. */ | |
1720 | ||
1721 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1722 | ||
c70d7499 CM |
1723 | /* |
1724 | * Create a sequence number with a 1 second | |
1725 | * timeout and 4 retries. | |
1726 | */ | |
1da177e4 LT |
1727 | rv = intf_next_seq(intf, |
1728 | recv_msg, | |
1729 | retry_time_ms, | |
1730 | retries, | |
1731 | broadcast, | |
1732 | &ipmb_seq, | |
1733 | &seqid); | |
1734 | if (rv) { | |
c70d7499 CM |
1735 | /* |
1736 | * We have used up all the sequence numbers, | |
1737 | * probably, so abort. | |
1738 | */ | |
1da177e4 LT |
1739 | spin_unlock_irqrestore(&(intf->seq_lock), |
1740 | flags); | |
1741 | goto out_err; | |
1742 | } | |
1743 | ||
25176ed6 CM |
1744 | ipmi_inc_stat(intf, sent_ipmb_commands); |
1745 | ||
c70d7499 CM |
1746 | /* |
1747 | * Store the sequence number in the message, | |
1748 | * so that when the send message response | |
1749 | * comes back we can start the timer. | |
1750 | */ | |
1da177e4 LT |
1751 | format_ipmb_msg(smi_msg, msg, ipmb_addr, |
1752 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1753 | ipmb_seq, broadcast, | |
1754 | source_address, source_lun); | |
1755 | ||
c70d7499 CM |
1756 | /* |
1757 | * Copy the message into the recv message data, so we | |
1758 | * can retransmit it later if necessary. | |
1759 | */ | |
1da177e4 LT |
1760 | memcpy(recv_msg->msg_data, smi_msg->data, |
1761 | smi_msg->data_size); | |
1762 | recv_msg->msg.data = recv_msg->msg_data; | |
1763 | recv_msg->msg.data_len = smi_msg->data_size; | |
1764 | ||
c70d7499 CM |
1765 | /* |
1766 | * We don't unlock until here, because we need | |
1767 | * to copy the completed message into the | |
1768 | * recv_msg before we release the lock. | |
1769 | * Otherwise, race conditions may bite us. I | |
1770 | * know that's pretty paranoid, but I prefer | |
1771 | * to be correct. | |
1772 | */ | |
1da177e4 LT |
1773 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1774 | } | |
25176ed6 | 1775 | } else if (is_lan_addr(addr)) { |
1da177e4 LT |
1776 | struct ipmi_lan_addr *lan_addr; |
1777 | unsigned char ipmb_seq; | |
1778 | long seqid; | |
1779 | ||
12fc1d7b | 1780 | if (addr->channel >= IPMI_MAX_CHANNELS) { |
b2655f26 | 1781 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1782 | rv = -EINVAL; |
1783 | goto out_err; | |
1784 | } | |
1785 | ||
1786 | if ((intf->channels[addr->channel].medium | |
c70d7499 | 1787 | != IPMI_CHANNEL_MEDIUM_8023LAN) |
1da177e4 | 1788 | && (intf->channels[addr->channel].medium |
c70d7499 | 1789 | != IPMI_CHANNEL_MEDIUM_ASYNC)) { |
b2655f26 | 1790 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1791 | rv = -EINVAL; |
1792 | goto out_err; | |
1793 | } | |
1794 | ||
1795 | retries = 4; | |
1796 | ||
1797 | /* Default to 1 second retries. */ | |
1798 | if (retry_time_ms == 0) | |
1799 | retry_time_ms = 1000; | |
1800 | ||
1801 | /* 11 for the header and 1 for the checksum. */ | |
1802 | if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) { | |
b2655f26 | 1803 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1804 | rv = -EMSGSIZE; |
1805 | goto out_err; | |
1806 | } | |
1807 | ||
1808 | lan_addr = (struct ipmi_lan_addr *) addr; | |
1809 | if (lan_addr->lun > 3) { | |
b2655f26 | 1810 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1811 | rv = -EINVAL; |
1812 | goto out_err; | |
1813 | } | |
1814 | ||
1815 | memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr)); | |
1816 | ||
1817 | if (recv_msg->msg.netfn & 0x1) { | |
c70d7499 CM |
1818 | /* |
1819 | * It's a response, so use the user's sequence | |
1820 | * from msgid. | |
1821 | */ | |
b2655f26 | 1822 | ipmi_inc_stat(intf, sent_lan_responses); |
1da177e4 LT |
1823 | format_lan_msg(smi_msg, msg, lan_addr, msgid, |
1824 | msgid, source_lun); | |
1825 | ||
c70d7499 CM |
1826 | /* |
1827 | * Save the receive message so we can use it | |
1828 | * to deliver the response. | |
1829 | */ | |
1da177e4 LT |
1830 | smi_msg->user_data = recv_msg; |
1831 | } else { | |
1832 | /* It's a command, so get a sequence for it. */ | |
1833 | ||
1834 | spin_lock_irqsave(&(intf->seq_lock), flags); | |
1835 | ||
c70d7499 CM |
1836 | /* |
1837 | * Create a sequence number with a 1 second | |
1838 | * timeout and 4 retries. | |
1839 | */ | |
1da177e4 LT |
1840 | rv = intf_next_seq(intf, |
1841 | recv_msg, | |
1842 | retry_time_ms, | |
1843 | retries, | |
1844 | 0, | |
1845 | &ipmb_seq, | |
1846 | &seqid); | |
1847 | if (rv) { | |
c70d7499 CM |
1848 | /* |
1849 | * We have used up all the sequence numbers, | |
1850 | * probably, so abort. | |
1851 | */ | |
1da177e4 LT |
1852 | spin_unlock_irqrestore(&(intf->seq_lock), |
1853 | flags); | |
1854 | goto out_err; | |
1855 | } | |
1856 | ||
25176ed6 CM |
1857 | ipmi_inc_stat(intf, sent_lan_commands); |
1858 | ||
c70d7499 CM |
1859 | /* |
1860 | * Store the sequence number in the message, | |
1861 | * so that when the send message response | |
1862 | * comes back we can start the timer. | |
1863 | */ | |
1da177e4 LT |
1864 | format_lan_msg(smi_msg, msg, lan_addr, |
1865 | STORE_SEQ_IN_MSGID(ipmb_seq, seqid), | |
1866 | ipmb_seq, source_lun); | |
1867 | ||
c70d7499 CM |
1868 | /* |
1869 | * Copy the message into the recv message data, so we | |
1870 | * can retransmit it later if necessary. | |
1871 | */ | |
1da177e4 LT |
1872 | memcpy(recv_msg->msg_data, smi_msg->data, |
1873 | smi_msg->data_size); | |
1874 | recv_msg->msg.data = recv_msg->msg_data; | |
1875 | recv_msg->msg.data_len = smi_msg->data_size; | |
1876 | ||
c70d7499 CM |
1877 | /* |
1878 | * We don't unlock until here, because we need | |
1879 | * to copy the completed message into the | |
1880 | * recv_msg before we release the lock. | |
1881 | * Otherwise, race conditions may bite us. I | |
1882 | * know that's pretty paranoid, but I prefer | |
1883 | * to be correct. | |
1884 | */ | |
1da177e4 LT |
1885 | spin_unlock_irqrestore(&(intf->seq_lock), flags); |
1886 | } | |
1887 | } else { | |
1888 | /* Unknown address type. */ | |
b2655f26 | 1889 | ipmi_inc_stat(intf, sent_invalid_commands); |
1da177e4 LT |
1890 | rv = -EINVAL; |
1891 | goto out_err; | |
1892 | } | |
1893 | ||
1894 | #ifdef DEBUG_MSGING | |
1895 | { | |
1896 | int m; | |
e8b33617 | 1897 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
1898 | printk(" %2.2x", smi_msg->data[m]); |
1899 | printk("\n"); | |
1900 | } | |
1901 | #endif | |
b2c03941 | 1902 | |
7ea0ed2b | 1903 | smi_send(intf, intf->handlers, smi_msg, priority); |
b2c03941 | 1904 | rcu_read_unlock(); |
1da177e4 LT |
1905 | |
1906 | return 0; | |
1907 | ||
1908 | out_err: | |
b2c03941 | 1909 | rcu_read_unlock(); |
1da177e4 LT |
1910 | ipmi_free_smi_msg(smi_msg); |
1911 | ipmi_free_recv_msg(recv_msg); | |
1912 | return rv; | |
1913 | } | |
1914 | ||
c14979b9 CM |
1915 | static int check_addr(ipmi_smi_t intf, |
1916 | struct ipmi_addr *addr, | |
1917 | unsigned char *saddr, | |
1918 | unsigned char *lun) | |
1919 | { | |
1920 | if (addr->channel >= IPMI_MAX_CHANNELS) | |
1921 | return -EINVAL; | |
1922 | *lun = intf->channels[addr->channel].lun; | |
1923 | *saddr = intf->channels[addr->channel].address; | |
1924 | return 0; | |
1925 | } | |
1926 | ||
1da177e4 LT |
1927 | int ipmi_request_settime(ipmi_user_t user, |
1928 | struct ipmi_addr *addr, | |
1929 | long msgid, | |
1930 | struct kernel_ipmi_msg *msg, | |
1931 | void *user_msg_data, | |
1932 | int priority, | |
1933 | int retries, | |
1934 | unsigned int retry_time_ms) | |
1935 | { | |
f0ba9390 | 1936 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1937 | int rv; |
1938 | ||
8a3628d5 | 1939 | if (!user) |
56a55ec6 | 1940 | return -EINVAL; |
c14979b9 CM |
1941 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1942 | if (rv) | |
1943 | return rv; | |
1da177e4 LT |
1944 | return i_ipmi_request(user, |
1945 | user->intf, | |
1946 | addr, | |
1947 | msgid, | |
1948 | msg, | |
1949 | user_msg_data, | |
1950 | NULL, NULL, | |
1951 | priority, | |
c14979b9 CM |
1952 | saddr, |
1953 | lun, | |
1da177e4 LT |
1954 | retries, |
1955 | retry_time_ms); | |
1956 | } | |
c70d7499 | 1957 | EXPORT_SYMBOL(ipmi_request_settime); |
1da177e4 LT |
1958 | |
1959 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
1960 | struct ipmi_addr *addr, | |
1961 | long msgid, | |
1962 | struct kernel_ipmi_msg *msg, | |
1963 | void *user_msg_data, | |
1964 | void *supplied_smi, | |
1965 | struct ipmi_recv_msg *supplied_recv, | |
1966 | int priority) | |
1967 | { | |
9ebca93b | 1968 | unsigned char saddr = 0, lun = 0; |
c14979b9 CM |
1969 | int rv; |
1970 | ||
8a3628d5 | 1971 | if (!user) |
56a55ec6 | 1972 | return -EINVAL; |
c14979b9 CM |
1973 | rv = check_addr(user->intf, addr, &saddr, &lun); |
1974 | if (rv) | |
1975 | return rv; | |
1da177e4 LT |
1976 | return i_ipmi_request(user, |
1977 | user->intf, | |
1978 | addr, | |
1979 | msgid, | |
1980 | msg, | |
1981 | user_msg_data, | |
1982 | supplied_smi, | |
1983 | supplied_recv, | |
1984 | priority, | |
c14979b9 CM |
1985 | saddr, |
1986 | lun, | |
1da177e4 LT |
1987 | -1, 0); |
1988 | } | |
c70d7499 | 1989 | EXPORT_SYMBOL(ipmi_request_supply_msgs); |
1da177e4 | 1990 | |
1aa16eea | 1991 | #ifdef CONFIG_PROC_FS |
07412736 | 1992 | static int smi_ipmb_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1993 | { |
07412736 | 1994 | ipmi_smi_t intf = m->private; |
c14979b9 | 1995 | int i; |
1da177e4 | 1996 | |
07412736 AD |
1997 | seq_printf(m, "%x", intf->channels[0].address); |
1998 | for (i = 1; i < IPMI_MAX_CHANNELS; i++) | |
1999 | seq_printf(m, " %x", intf->channels[i].address); | |
2000 | return seq_putc(m, '\n'); | |
1da177e4 LT |
2001 | } |
2002 | ||
07412736 | 2003 | static int smi_ipmb_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2004 | { |
d9dda78b | 2005 | return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode)); |
07412736 | 2006 | } |
1da177e4 | 2007 | |
07412736 AD |
2008 | static const struct file_operations smi_ipmb_proc_ops = { |
2009 | .open = smi_ipmb_proc_open, | |
2010 | .read = seq_read, | |
2011 | .llseek = seq_lseek, | |
2012 | .release = single_release, | |
2013 | }; | |
2014 | ||
2015 | static int smi_version_proc_show(struct seq_file *m, void *v) | |
2016 | { | |
2017 | ipmi_smi_t intf = m->private; | |
2018 | ||
2019 | return seq_printf(m, "%u.%u\n", | |
50c812b2 CM |
2020 | ipmi_version_major(&intf->bmc->id), |
2021 | ipmi_version_minor(&intf->bmc->id)); | |
1da177e4 LT |
2022 | } |
2023 | ||
07412736 | 2024 | static int smi_version_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2025 | { |
d9dda78b | 2026 | return single_open(file, smi_version_proc_show, PDE_DATA(inode)); |
07412736 AD |
2027 | } |
2028 | ||
2029 | static const struct file_operations smi_version_proc_ops = { | |
2030 | .open = smi_version_proc_open, | |
2031 | .read = seq_read, | |
2032 | .llseek = seq_lseek, | |
2033 | .release = single_release, | |
2034 | }; | |
1da177e4 | 2035 | |
07412736 AD |
2036 | static int smi_stats_proc_show(struct seq_file *m, void *v) |
2037 | { | |
2038 | ipmi_smi_t intf = m->private; | |
2039 | ||
2040 | seq_printf(m, "sent_invalid_commands: %u\n", | |
b2655f26 | 2041 | ipmi_get_stat(intf, sent_invalid_commands)); |
07412736 | 2042 | seq_printf(m, "sent_local_commands: %u\n", |
b2655f26 | 2043 | ipmi_get_stat(intf, sent_local_commands)); |
07412736 | 2044 | seq_printf(m, "handled_local_responses: %u\n", |
b2655f26 | 2045 | ipmi_get_stat(intf, handled_local_responses)); |
07412736 | 2046 | seq_printf(m, "unhandled_local_responses: %u\n", |
b2655f26 | 2047 | ipmi_get_stat(intf, unhandled_local_responses)); |
07412736 | 2048 | seq_printf(m, "sent_ipmb_commands: %u\n", |
b2655f26 | 2049 | ipmi_get_stat(intf, sent_ipmb_commands)); |
07412736 | 2050 | seq_printf(m, "sent_ipmb_command_errs: %u\n", |
b2655f26 | 2051 | ipmi_get_stat(intf, sent_ipmb_command_errs)); |
07412736 | 2052 | seq_printf(m, "retransmitted_ipmb_commands: %u\n", |
b2655f26 | 2053 | ipmi_get_stat(intf, retransmitted_ipmb_commands)); |
07412736 | 2054 | seq_printf(m, "timed_out_ipmb_commands: %u\n", |
b2655f26 | 2055 | ipmi_get_stat(intf, timed_out_ipmb_commands)); |
07412736 | 2056 | seq_printf(m, "timed_out_ipmb_broadcasts: %u\n", |
b2655f26 | 2057 | ipmi_get_stat(intf, timed_out_ipmb_broadcasts)); |
07412736 | 2058 | seq_printf(m, "sent_ipmb_responses: %u\n", |
b2655f26 | 2059 | ipmi_get_stat(intf, sent_ipmb_responses)); |
07412736 | 2060 | seq_printf(m, "handled_ipmb_responses: %u\n", |
b2655f26 | 2061 | ipmi_get_stat(intf, handled_ipmb_responses)); |
07412736 | 2062 | seq_printf(m, "invalid_ipmb_responses: %u\n", |
b2655f26 | 2063 | ipmi_get_stat(intf, invalid_ipmb_responses)); |
07412736 | 2064 | seq_printf(m, "unhandled_ipmb_responses: %u\n", |
b2655f26 | 2065 | ipmi_get_stat(intf, unhandled_ipmb_responses)); |
07412736 | 2066 | seq_printf(m, "sent_lan_commands: %u\n", |
b2655f26 | 2067 | ipmi_get_stat(intf, sent_lan_commands)); |
07412736 | 2068 | seq_printf(m, "sent_lan_command_errs: %u\n", |
b2655f26 | 2069 | ipmi_get_stat(intf, sent_lan_command_errs)); |
07412736 | 2070 | seq_printf(m, "retransmitted_lan_commands: %u\n", |
b2655f26 | 2071 | ipmi_get_stat(intf, retransmitted_lan_commands)); |
07412736 | 2072 | seq_printf(m, "timed_out_lan_commands: %u\n", |
b2655f26 | 2073 | ipmi_get_stat(intf, timed_out_lan_commands)); |
07412736 | 2074 | seq_printf(m, "sent_lan_responses: %u\n", |
b2655f26 | 2075 | ipmi_get_stat(intf, sent_lan_responses)); |
07412736 | 2076 | seq_printf(m, "handled_lan_responses: %u\n", |
b2655f26 | 2077 | ipmi_get_stat(intf, handled_lan_responses)); |
07412736 | 2078 | seq_printf(m, "invalid_lan_responses: %u\n", |
b2655f26 | 2079 | ipmi_get_stat(intf, invalid_lan_responses)); |
07412736 | 2080 | seq_printf(m, "unhandled_lan_responses: %u\n", |
b2655f26 | 2081 | ipmi_get_stat(intf, unhandled_lan_responses)); |
07412736 | 2082 | seq_printf(m, "handled_commands: %u\n", |
b2655f26 | 2083 | ipmi_get_stat(intf, handled_commands)); |
07412736 | 2084 | seq_printf(m, "invalid_commands: %u\n", |
b2655f26 | 2085 | ipmi_get_stat(intf, invalid_commands)); |
07412736 | 2086 | seq_printf(m, "unhandled_commands: %u\n", |
b2655f26 | 2087 | ipmi_get_stat(intf, unhandled_commands)); |
07412736 | 2088 | seq_printf(m, "invalid_events: %u\n", |
b2655f26 | 2089 | ipmi_get_stat(intf, invalid_events)); |
07412736 | 2090 | seq_printf(m, "events: %u\n", |
b2655f26 | 2091 | ipmi_get_stat(intf, events)); |
07412736 | 2092 | seq_printf(m, "failed rexmit LAN msgs: %u\n", |
25176ed6 | 2093 | ipmi_get_stat(intf, dropped_rexmit_lan_commands)); |
07412736 | 2094 | seq_printf(m, "failed rexmit IPMB msgs: %u\n", |
25176ed6 | 2095 | ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); |
07412736 AD |
2096 | return 0; |
2097 | } | |
1da177e4 | 2098 | |
07412736 AD |
2099 | static int smi_stats_proc_open(struct inode *inode, struct file *file) |
2100 | { | |
d9dda78b | 2101 | return single_open(file, smi_stats_proc_show, PDE_DATA(inode)); |
1da177e4 | 2102 | } |
07412736 AD |
2103 | |
2104 | static const struct file_operations smi_stats_proc_ops = { | |
2105 | .open = smi_stats_proc_open, | |
2106 | .read = seq_read, | |
2107 | .llseek = seq_lseek, | |
2108 | .release = single_release, | |
2109 | }; | |
1aa16eea | 2110 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2111 | |
2112 | int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, | |
07412736 | 2113 | const struct file_operations *proc_ops, |
99b76233 | 2114 | void *data) |
1da177e4 | 2115 | { |
1da177e4 | 2116 | int rv = 0; |
3b625943 CM |
2117 | #ifdef CONFIG_PROC_FS |
2118 | struct proc_dir_entry *file; | |
1da177e4 LT |
2119 | struct ipmi_proc_entry *entry; |
2120 | ||
2121 | /* Create a list element. */ | |
2122 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
2123 | if (!entry) | |
2124 | return -ENOMEM; | |
1b6b698f | 2125 | entry->name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
2126 | if (!entry->name) { |
2127 | kfree(entry); | |
2128 | return -ENOMEM; | |
2129 | } | |
1da177e4 | 2130 | |
07412736 | 2131 | file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data); |
1da177e4 LT |
2132 | if (!file) { |
2133 | kfree(entry->name); | |
2134 | kfree(entry); | |
2135 | rv = -ENOMEM; | |
2136 | } else { | |
ac019151 | 2137 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2138 | /* Stick it on the list. */ |
2139 | entry->next = smi->proc_entries; | |
2140 | smi->proc_entries = entry; | |
ac019151 | 2141 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2142 | } |
3b625943 | 2143 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2144 | |
2145 | return rv; | |
2146 | } | |
c70d7499 | 2147 | EXPORT_SYMBOL(ipmi_smi_add_proc_entry); |
1da177e4 LT |
2148 | |
2149 | static int add_proc_entries(ipmi_smi_t smi, int num) | |
2150 | { | |
2151 | int rv = 0; | |
2152 | ||
3b625943 | 2153 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2154 | sprintf(smi->proc_dir_name, "%d", num); |
2155 | smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root); | |
2156 | if (!smi->proc_dir) | |
2157 | rv = -ENOMEM; | |
1da177e4 LT |
2158 | |
2159 | if (rv == 0) | |
2160 | rv = ipmi_smi_add_proc_entry(smi, "stats", | |
07412736 | 2161 | &smi_stats_proc_ops, |
99b76233 | 2162 | smi); |
1da177e4 LT |
2163 | |
2164 | if (rv == 0) | |
2165 | rv = ipmi_smi_add_proc_entry(smi, "ipmb", | |
07412736 | 2166 | &smi_ipmb_proc_ops, |
99b76233 | 2167 | smi); |
1da177e4 LT |
2168 | |
2169 | if (rv == 0) | |
2170 | rv = ipmi_smi_add_proc_entry(smi, "version", | |
07412736 | 2171 | &smi_version_proc_ops, |
99b76233 | 2172 | smi); |
3b625943 | 2173 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2174 | |
2175 | return rv; | |
2176 | } | |
2177 | ||
2178 | static void remove_proc_entries(ipmi_smi_t smi) | |
2179 | { | |
3b625943 | 2180 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
2181 | struct ipmi_proc_entry *entry; |
2182 | ||
ac019151 | 2183 | mutex_lock(&smi->proc_entry_lock); |
1da177e4 LT |
2184 | while (smi->proc_entries) { |
2185 | entry = smi->proc_entries; | |
2186 | smi->proc_entries = entry->next; | |
2187 | ||
2188 | remove_proc_entry(entry->name, smi->proc_dir); | |
2189 | kfree(entry->name); | |
2190 | kfree(entry); | |
2191 | } | |
ac019151 | 2192 | mutex_unlock(&smi->proc_entry_lock); |
1da177e4 | 2193 | remove_proc_entry(smi->proc_dir_name, proc_ipmi_root); |
3b625943 | 2194 | #endif /* CONFIG_PROC_FS */ |
1da177e4 LT |
2195 | } |
2196 | ||
50c812b2 CM |
2197 | static int __find_bmc_guid(struct device *dev, void *data) |
2198 | { | |
2199 | unsigned char *id = data; | |
16639eb0 | 2200 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2201 | return memcmp(bmc->guid, id, 16) == 0; |
2202 | } | |
2203 | ||
2204 | static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv, | |
2205 | unsigned char *guid) | |
2206 | { | |
2207 | struct device *dev; | |
2208 | ||
2209 | dev = driver_find_device(drv, NULL, guid, __find_bmc_guid); | |
2210 | if (dev) | |
16639eb0 | 2211 | return to_bmc_device(dev); |
50c812b2 CM |
2212 | else |
2213 | return NULL; | |
2214 | } | |
2215 | ||
2216 | struct prod_dev_id { | |
2217 | unsigned int product_id; | |
2218 | unsigned char device_id; | |
2219 | }; | |
2220 | ||
2221 | static int __find_bmc_prod_dev_id(struct device *dev, void *data) | |
2222 | { | |
2223 | struct prod_dev_id *id = data; | |
16639eb0 | 2224 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2225 | |
2226 | return (bmc->id.product_id == id->product_id | |
50c812b2 CM |
2227 | && bmc->id.device_id == id->device_id); |
2228 | } | |
2229 | ||
2230 | static struct bmc_device *ipmi_find_bmc_prod_dev_id( | |
2231 | struct device_driver *drv, | |
f0b55da0 | 2232 | unsigned int product_id, unsigned char device_id) |
50c812b2 CM |
2233 | { |
2234 | struct prod_dev_id id = { | |
2235 | .product_id = product_id, | |
2236 | .device_id = device_id, | |
2237 | }; | |
2238 | struct device *dev; | |
2239 | ||
2240 | dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id); | |
2241 | if (dev) | |
16639eb0 | 2242 | return to_bmc_device(dev); |
50c812b2 CM |
2243 | else |
2244 | return NULL; | |
2245 | } | |
2246 | ||
2247 | static ssize_t device_id_show(struct device *dev, | |
2248 | struct device_attribute *attr, | |
2249 | char *buf) | |
2250 | { | |
16639eb0 | 2251 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2252 | |
2253 | return snprintf(buf, 10, "%u\n", bmc->id.device_id); | |
2254 | } | |
16639eb0 | 2255 | DEVICE_ATTR(device_id, S_IRUGO, device_id_show, NULL); |
50c812b2 | 2256 | |
16639eb0 CM |
2257 | static ssize_t provides_device_sdrs_show(struct device *dev, |
2258 | struct device_attribute *attr, | |
2259 | char *buf) | |
50c812b2 | 2260 | { |
16639eb0 | 2261 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2262 | |
2263 | return snprintf(buf, 10, "%u\n", | |
7947d2cc | 2264 | (bmc->id.device_revision & 0x80) >> 7); |
50c812b2 | 2265 | } |
16639eb0 | 2266 | DEVICE_ATTR(provides_device_sdrs, S_IRUGO, provides_device_sdrs_show, NULL); |
50c812b2 CM |
2267 | |
2268 | static ssize_t revision_show(struct device *dev, struct device_attribute *attr, | |
2269 | char *buf) | |
2270 | { | |
16639eb0 | 2271 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2272 | |
2273 | return snprintf(buf, 20, "%u\n", | |
7947d2cc | 2274 | bmc->id.device_revision & 0x0F); |
50c812b2 | 2275 | } |
16639eb0 | 2276 | DEVICE_ATTR(revision, S_IRUGO, revision_show, NULL); |
50c812b2 | 2277 | |
16639eb0 CM |
2278 | static ssize_t firmware_revision_show(struct device *dev, |
2279 | struct device_attribute *attr, | |
2280 | char *buf) | |
50c812b2 | 2281 | { |
16639eb0 | 2282 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2283 | |
2284 | return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1, | |
2285 | bmc->id.firmware_revision_2); | |
2286 | } | |
16639eb0 | 2287 | DEVICE_ATTR(firmware_revision, S_IRUGO, firmware_revision_show, NULL); |
50c812b2 CM |
2288 | |
2289 | static ssize_t ipmi_version_show(struct device *dev, | |
2290 | struct device_attribute *attr, | |
2291 | char *buf) | |
2292 | { | |
16639eb0 | 2293 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2294 | |
2295 | return snprintf(buf, 20, "%u.%u\n", | |
2296 | ipmi_version_major(&bmc->id), | |
2297 | ipmi_version_minor(&bmc->id)); | |
2298 | } | |
16639eb0 | 2299 | DEVICE_ATTR(ipmi_version, S_IRUGO, ipmi_version_show, NULL); |
50c812b2 CM |
2300 | |
2301 | static ssize_t add_dev_support_show(struct device *dev, | |
2302 | struct device_attribute *attr, | |
2303 | char *buf) | |
2304 | { | |
16639eb0 | 2305 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2306 | |
2307 | return snprintf(buf, 10, "0x%02x\n", | |
2308 | bmc->id.additional_device_support); | |
2309 | } | |
16639eb0 | 2310 | DEVICE_ATTR(additional_device_support, S_IRUGO, add_dev_support_show, NULL); |
50c812b2 CM |
2311 | |
2312 | static ssize_t manufacturer_id_show(struct device *dev, | |
2313 | struct device_attribute *attr, | |
2314 | char *buf) | |
2315 | { | |
16639eb0 | 2316 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2317 | |
2318 | return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id); | |
2319 | } | |
16639eb0 | 2320 | DEVICE_ATTR(manufacturer_id, S_IRUGO, manufacturer_id_show, NULL); |
50c812b2 CM |
2321 | |
2322 | static ssize_t product_id_show(struct device *dev, | |
2323 | struct device_attribute *attr, | |
2324 | char *buf) | |
2325 | { | |
16639eb0 | 2326 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2327 | |
2328 | return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id); | |
2329 | } | |
16639eb0 | 2330 | DEVICE_ATTR(product_id, S_IRUGO, product_id_show, NULL); |
50c812b2 CM |
2331 | |
2332 | static ssize_t aux_firmware_rev_show(struct device *dev, | |
2333 | struct device_attribute *attr, | |
2334 | char *buf) | |
2335 | { | |
16639eb0 | 2336 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2337 | |
2338 | return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n", | |
2339 | bmc->id.aux_firmware_revision[3], | |
2340 | bmc->id.aux_firmware_revision[2], | |
2341 | bmc->id.aux_firmware_revision[1], | |
2342 | bmc->id.aux_firmware_revision[0]); | |
2343 | } | |
16639eb0 | 2344 | DEVICE_ATTR(aux_firmware_revision, S_IRUGO, aux_firmware_rev_show, NULL); |
50c812b2 CM |
2345 | |
2346 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, | |
2347 | char *buf) | |
2348 | { | |
16639eb0 | 2349 | struct bmc_device *bmc = to_bmc_device(dev); |
50c812b2 CM |
2350 | |
2351 | return snprintf(buf, 100, "%Lx%Lx\n", | |
2352 | (long long) bmc->guid[0], | |
2353 | (long long) bmc->guid[8]); | |
2354 | } | |
16639eb0 CM |
2355 | DEVICE_ATTR(guid, S_IRUGO, guid_show, NULL); |
2356 | ||
2357 | static struct attribute *bmc_dev_attrs[] = { | |
2358 | &dev_attr_device_id.attr, | |
2359 | &dev_attr_provides_device_sdrs.attr, | |
2360 | &dev_attr_revision.attr, | |
2361 | &dev_attr_firmware_revision.attr, | |
2362 | &dev_attr_ipmi_version.attr, | |
2363 | &dev_attr_additional_device_support.attr, | |
2364 | &dev_attr_manufacturer_id.attr, | |
2365 | &dev_attr_product_id.attr, | |
2366 | NULL | |
2367 | }; | |
50c812b2 | 2368 | |
16639eb0 CM |
2369 | static struct attribute_group bmc_dev_attr_group = { |
2370 | .attrs = bmc_dev_attrs, | |
2371 | }; | |
5e59393e | 2372 | |
16639eb0 CM |
2373 | static const struct attribute_group *bmc_dev_attr_groups[] = { |
2374 | &bmc_dev_attr_group, | |
2375 | NULL | |
2376 | }; | |
2377 | ||
2378 | static struct device_type bmc_device_type = { | |
2379 | .groups = bmc_dev_attr_groups, | |
2380 | }; | |
2381 | ||
2382 | static void | |
2383 | release_bmc_device(struct device *dev) | |
2384 | { | |
2385 | kfree(to_bmc_device(dev)); | |
5e59393e JG |
2386 | } |
2387 | ||
2388 | static void | |
2389 | cleanup_bmc_device(struct kref *ref) | |
2390 | { | |
16639eb0 | 2391 | struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount); |
5e59393e | 2392 | |
16639eb0 CM |
2393 | if (bmc->id.aux_firmware_revision_set) |
2394 | device_remove_file(&bmc->pdev.dev, | |
2395 | &bmc->aux_firmware_rev_attr); | |
2396 | if (bmc->guid_set) | |
2397 | device_remove_file(&bmc->pdev.dev, | |
2398 | &bmc->guid_attr); | |
5e59393e | 2399 | |
16639eb0 | 2400 | platform_device_unregister(&bmc->pdev); |
50c812b2 CM |
2401 | } |
2402 | ||
2403 | static void ipmi_bmc_unregister(ipmi_smi_t intf) | |
2404 | { | |
2405 | struct bmc_device *bmc = intf->bmc; | |
2406 | ||
5a0e10ec | 2407 | sysfs_remove_link(&intf->si_dev->kobj, "bmc"); |
50c812b2 | 2408 | if (intf->my_dev_name) { |
16639eb0 | 2409 | sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name); |
50c812b2 CM |
2410 | kfree(intf->my_dev_name); |
2411 | intf->my_dev_name = NULL; | |
2412 | } | |
2413 | ||
2414 | mutex_lock(&ipmidriver_mutex); | |
16639eb0 | 2415 | kref_put(&bmc->usecount, cleanup_bmc_device); |
f0b55da0 | 2416 | intf->bmc = NULL; |
50c812b2 CM |
2417 | mutex_unlock(&ipmidriver_mutex); |
2418 | } | |
2419 | ||
16639eb0 | 2420 | static int create_bmc_files(struct bmc_device *bmc) |
5e59393e JG |
2421 | { |
2422 | int err; | |
2423 | ||
5e59393e | 2424 | if (bmc->id.aux_firmware_revision_set) { |
3d9e5df5 | 2425 | bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision"; |
16639eb0 | 2426 | err = device_create_file(&bmc->pdev.dev, |
5e59393e | 2427 | &bmc->aux_firmware_rev_attr); |
c70d7499 | 2428 | if (err) |
16639eb0 | 2429 | goto out; |
5e59393e JG |
2430 | } |
2431 | if (bmc->guid_set) { | |
3d9e5df5 | 2432 | bmc->guid_attr.attr.name = "guid"; |
16639eb0 | 2433 | err = device_create_file(&bmc->pdev.dev, |
5e59393e | 2434 | &bmc->guid_attr); |
c70d7499 CM |
2435 | if (err) |
2436 | goto out_aux_firm; | |
5e59393e JG |
2437 | } |
2438 | ||
2439 | return 0; | |
2440 | ||
2441 | out_aux_firm: | |
2442 | if (bmc->id.aux_firmware_revision_set) | |
16639eb0 | 2443 | device_remove_file(&bmc->pdev.dev, |
5e59393e | 2444 | &bmc->aux_firmware_rev_attr); |
5e59393e JG |
2445 | out: |
2446 | return err; | |
2447 | } | |
2448 | ||
5a0e10ec | 2449 | static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) |
50c812b2 CM |
2450 | { |
2451 | int rv; | |
2452 | struct bmc_device *bmc = intf->bmc; | |
2453 | struct bmc_device *old_bmc; | |
50c812b2 CM |
2454 | |
2455 | mutex_lock(&ipmidriver_mutex); | |
2456 | ||
2457 | /* | |
2458 | * Try to find if there is an bmc_device struct | |
2459 | * representing the interfaced BMC already | |
2460 | */ | |
2461 | if (bmc->guid_set) | |
fe2d5ffc | 2462 | old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid); |
50c812b2 | 2463 | else |
fe2d5ffc | 2464 | old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
50c812b2 CM |
2465 | bmc->id.product_id, |
2466 | bmc->id.device_id); | |
2467 | ||
2468 | /* | |
2469 | * If there is already an bmc_device, free the new one, | |
2470 | * otherwise register the new BMC device | |
2471 | */ | |
2472 | if (old_bmc) { | |
2473 | kfree(bmc); | |
2474 | intf->bmc = old_bmc; | |
2475 | bmc = old_bmc; | |
2476 | ||
16639eb0 | 2477 | kref_get(&bmc->usecount); |
50c812b2 CM |
2478 | mutex_unlock(&ipmidriver_mutex); |
2479 | ||
2480 | printk(KERN_INFO | |
2481 | "ipmi: interfacing existing BMC (man_id: 0x%6.6x," | |
2482 | " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2483 | bmc->id.manufacturer_id, | |
2484 | bmc->id.product_id, | |
2485 | bmc->id.device_id); | |
2486 | } else { | |
f0b55da0 CM |
2487 | unsigned char orig_dev_id = bmc->id.device_id; |
2488 | int warn_printed = 0; | |
2489 | ||
16639eb0 | 2490 | snprintf(bmc->name, sizeof(bmc->name), |
f0b55da0 | 2491 | "ipmi_bmc.%4.4x", bmc->id.product_id); |
16639eb0 | 2492 | bmc->pdev.name = bmc->name; |
f0b55da0 | 2493 | |
fe2d5ffc | 2494 | while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver, |
f0b55da0 | 2495 | bmc->id.product_id, |
1d5636cc | 2496 | bmc->id.device_id)) { |
f0b55da0 CM |
2497 | if (!warn_printed) { |
2498 | printk(KERN_WARNING PFX | |
2499 | "This machine has two different BMCs" | |
2500 | " with the same product id and device" | |
2501 | " id. This is an error in the" | |
2502 | " firmware, but incrementing the" | |
2503 | " device id to work around the problem." | |
2504 | " Prod ID = 0x%x, Dev ID = 0x%x\n", | |
2505 | bmc->id.product_id, bmc->id.device_id); | |
2506 | warn_printed = 1; | |
2507 | } | |
2508 | bmc->id.device_id++; /* Wraps at 255 */ | |
2509 | if (bmc->id.device_id == orig_dev_id) { | |
2510 | printk(KERN_ERR PFX | |
2511 | "Out of device ids!\n"); | |
2512 | break; | |
2513 | } | |
2514 | } | |
2515 | ||
16639eb0 CM |
2516 | bmc->pdev.dev.driver = &ipmidriver.driver; |
2517 | bmc->pdev.id = bmc->id.device_id; | |
2518 | bmc->pdev.dev.release = release_bmc_device; | |
2519 | bmc->pdev.dev.type = &bmc_device_type; | |
5a0e10ec | 2520 | kref_init(&bmc->usecount); |
50c812b2 | 2521 | |
16639eb0 | 2522 | rv = platform_device_register(&bmc->pdev); |
50c812b2 CM |
2523 | mutex_unlock(&ipmidriver_mutex); |
2524 | if (rv) { | |
16639eb0 | 2525 | put_device(&bmc->pdev.dev); |
50c812b2 CM |
2526 | printk(KERN_ERR |
2527 | "ipmi_msghandler:" | |
2528 | " Unable to register bmc device: %d\n", | |
2529 | rv); | |
c70d7499 CM |
2530 | /* |
2531 | * Don't go to out_err, you can only do that if | |
2532 | * the device is registered already. | |
2533 | */ | |
50c812b2 CM |
2534 | return rv; |
2535 | } | |
2536 | ||
16639eb0 | 2537 | rv = create_bmc_files(bmc); |
5e59393e JG |
2538 | if (rv) { |
2539 | mutex_lock(&ipmidriver_mutex); | |
16639eb0 | 2540 | platform_device_unregister(&bmc->pdev); |
5e59393e JG |
2541 | mutex_unlock(&ipmidriver_mutex); |
2542 | ||
2543 | return rv; | |
2544 | } | |
50c812b2 | 2545 | |
279fbd0c MS |
2546 | dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, " |
2547 | "prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n", | |
2548 | bmc->id.manufacturer_id, | |
2549 | bmc->id.product_id, | |
2550 | bmc->id.device_id); | |
50c812b2 CM |
2551 | } |
2552 | ||
2553 | /* | |
2554 | * create symlink from system interface device to bmc device | |
2555 | * and back. | |
2556 | */ | |
5a0e10ec | 2557 | rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc"); |
50c812b2 CM |
2558 | if (rv) { |
2559 | printk(KERN_ERR | |
2560 | "ipmi_msghandler: Unable to create bmc symlink: %d\n", | |
2561 | rv); | |
2562 | goto out_err; | |
2563 | } | |
2564 | ||
16639eb0 | 2565 | intf->my_dev_name = kasprintf(GFP_KERNEL, "ipmi%d", ifnum); |
50c812b2 CM |
2566 | if (!intf->my_dev_name) { |
2567 | rv = -ENOMEM; | |
2568 | printk(KERN_ERR | |
2569 | "ipmi_msghandler: allocate link from BMC: %d\n", | |
2570 | rv); | |
2571 | goto out_err; | |
2572 | } | |
50c812b2 | 2573 | |
16639eb0 | 2574 | rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj, |
50c812b2 CM |
2575 | intf->my_dev_name); |
2576 | if (rv) { | |
2577 | kfree(intf->my_dev_name); | |
2578 | intf->my_dev_name = NULL; | |
2579 | printk(KERN_ERR | |
2580 | "ipmi_msghandler:" | |
2581 | " Unable to create symlink to bmc: %d\n", | |
2582 | rv); | |
2583 | goto out_err; | |
2584 | } | |
2585 | ||
2586 | return 0; | |
2587 | ||
2588 | out_err: | |
2589 | ipmi_bmc_unregister(intf); | |
2590 | return rv; | |
2591 | } | |
2592 | ||
2593 | static int | |
2594 | send_guid_cmd(ipmi_smi_t intf, int chan) | |
2595 | { | |
2596 | struct kernel_ipmi_msg msg; | |
2597 | struct ipmi_system_interface_addr si; | |
2598 | ||
2599 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2600 | si.channel = IPMI_BMC_CHANNEL; | |
2601 | si.lun = 0; | |
2602 | ||
2603 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2604 | msg.cmd = IPMI_GET_DEVICE_GUID_CMD; | |
2605 | msg.data = NULL; | |
2606 | msg.data_len = 0; | |
2607 | return i_ipmi_request(NULL, | |
2608 | intf, | |
2609 | (struct ipmi_addr *) &si, | |
2610 | 0, | |
2611 | &msg, | |
2612 | intf, | |
2613 | NULL, | |
2614 | NULL, | |
2615 | 0, | |
2616 | intf->channels[0].address, | |
2617 | intf->channels[0].lun, | |
2618 | -1, 0); | |
2619 | } | |
2620 | ||
2621 | static void | |
2622 | guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) | |
2623 | { | |
2624 | if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE) | |
2625 | || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE) | |
2626 | || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD)) | |
2627 | /* Not for me */ | |
2628 | return; | |
2629 | ||
2630 | if (msg->msg.data[0] != 0) { | |
2631 | /* Error from getting the GUID, the BMC doesn't have one. */ | |
2632 | intf->bmc->guid_set = 0; | |
2633 | goto out; | |
2634 | } | |
2635 | ||
2636 | if (msg->msg.data_len < 17) { | |
2637 | intf->bmc->guid_set = 0; | |
2638 | printk(KERN_WARNING PFX | |
2639 | "guid_handler: The GUID response from the BMC was too" | |
2640 | " short, it was %d but should have been 17. Assuming" | |
2641 | " GUID is not available.\n", | |
2642 | msg->msg.data_len); | |
2643 | goto out; | |
2644 | } | |
2645 | ||
2646 | memcpy(intf->bmc->guid, msg->msg.data, 16); | |
2647 | intf->bmc->guid_set = 1; | |
2648 | out: | |
2649 | wake_up(&intf->waitq); | |
2650 | } | |
2651 | ||
2652 | static void | |
2653 | get_guid(ipmi_smi_t intf) | |
2654 | { | |
2655 | int rv; | |
2656 | ||
2657 | intf->bmc->guid_set = 0x2; | |
2658 | intf->null_user_handler = guid_handler; | |
2659 | rv = send_guid_cmd(intf, 0); | |
2660 | if (rv) | |
2661 | /* Send failed, no GUID available. */ | |
2662 | intf->bmc->guid_set = 0; | |
2663 | wait_event(intf->waitq, intf->bmc->guid_set != 2); | |
2664 | intf->null_user_handler = NULL; | |
2665 | } | |
2666 | ||
1da177e4 LT |
2667 | static int |
2668 | send_channel_info_cmd(ipmi_smi_t intf, int chan) | |
2669 | { | |
2670 | struct kernel_ipmi_msg msg; | |
2671 | unsigned char data[1]; | |
2672 | struct ipmi_system_interface_addr si; | |
2673 | ||
2674 | si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
2675 | si.channel = IPMI_BMC_CHANNEL; | |
2676 | si.lun = 0; | |
2677 | ||
2678 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
2679 | msg.cmd = IPMI_GET_CHANNEL_INFO_CMD; | |
2680 | msg.data = data; | |
2681 | msg.data_len = 1; | |
2682 | data[0] = chan; | |
2683 | return i_ipmi_request(NULL, | |
2684 | intf, | |
2685 | (struct ipmi_addr *) &si, | |
2686 | 0, | |
2687 | &msg, | |
56a55ec6 | 2688 | intf, |
1da177e4 LT |
2689 | NULL, |
2690 | NULL, | |
2691 | 0, | |
c14979b9 CM |
2692 | intf->channels[0].address, |
2693 | intf->channels[0].lun, | |
1da177e4 LT |
2694 | -1, 0); |
2695 | } | |
2696 | ||
2697 | static void | |
56a55ec6 | 2698 | channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 LT |
2699 | { |
2700 | int rv = 0; | |
2701 | int chan; | |
2702 | ||
56a55ec6 CM |
2703 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
2704 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
c70d7499 | 2705 | && (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) { |
1da177e4 | 2706 | /* It's the one we want */ |
56a55ec6 | 2707 | if (msg->msg.data[0] != 0) { |
1da177e4 LT |
2708 | /* Got an error from the channel, just go on. */ |
2709 | ||
56a55ec6 | 2710 | if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) { |
c70d7499 CM |
2711 | /* |
2712 | * If the MC does not support this | |
2713 | * command, that is legal. We just | |
2714 | * assume it has one IPMB at channel | |
2715 | * zero. | |
2716 | */ | |
1da177e4 LT |
2717 | intf->channels[0].medium |
2718 | = IPMI_CHANNEL_MEDIUM_IPMB; | |
2719 | intf->channels[0].protocol | |
2720 | = IPMI_CHANNEL_PROTOCOL_IPMB; | |
1da177e4 LT |
2721 | |
2722 | intf->curr_channel = IPMI_MAX_CHANNELS; | |
2723 | wake_up(&intf->waitq); | |
2724 | goto out; | |
2725 | } | |
2726 | goto next_channel; | |
2727 | } | |
56a55ec6 | 2728 | if (msg->msg.data_len < 4) { |
1da177e4 LT |
2729 | /* Message not big enough, just go on. */ |
2730 | goto next_channel; | |
2731 | } | |
2732 | chan = intf->curr_channel; | |
56a55ec6 CM |
2733 | intf->channels[chan].medium = msg->msg.data[2] & 0x7f; |
2734 | intf->channels[chan].protocol = msg->msg.data[3] & 0x1f; | |
1da177e4 | 2735 | |
c70d7499 | 2736 | next_channel: |
1da177e4 LT |
2737 | intf->curr_channel++; |
2738 | if (intf->curr_channel >= IPMI_MAX_CHANNELS) | |
2739 | wake_up(&intf->waitq); | |
2740 | else | |
2741 | rv = send_channel_info_cmd(intf, intf->curr_channel); | |
2742 | ||
2743 | if (rv) { | |
2744 | /* Got an error somehow, just give up. */ | |
1f668423 CM |
2745 | printk(KERN_WARNING PFX |
2746 | "Error sending channel information for channel" | |
2747 | " %d: %d\n", intf->curr_channel, rv); | |
2748 | ||
1da177e4 LT |
2749 | intf->curr_channel = IPMI_MAX_CHANNELS; |
2750 | wake_up(&intf->waitq); | |
1da177e4 LT |
2751 | } |
2752 | } | |
2753 | out: | |
2754 | return; | |
2755 | } | |
2756 | ||
895dcfd1 | 2757 | static void ipmi_poll(ipmi_smi_t intf) |
fcfa4724 | 2758 | { |
fcfa4724 CM |
2759 | if (intf->handlers->poll) |
2760 | intf->handlers->poll(intf->send_info); | |
7adf579c CM |
2761 | /* In case something came in */ |
2762 | handle_new_recv_msgs(intf); | |
fcfa4724 | 2763 | } |
895dcfd1 CM |
2764 | |
2765 | void ipmi_poll_interface(ipmi_user_t user) | |
2766 | { | |
2767 | ipmi_poll(user->intf); | |
fcfa4724 | 2768 | } |
c70d7499 | 2769 | EXPORT_SYMBOL(ipmi_poll_interface); |
fcfa4724 | 2770 | |
1da177e4 LT |
2771 | int ipmi_register_smi(struct ipmi_smi_handlers *handlers, |
2772 | void *send_info, | |
50c812b2 CM |
2773 | struct ipmi_device_id *device_id, |
2774 | struct device *si_dev, | |
453823ba | 2775 | unsigned char slave_addr) |
1da177e4 LT |
2776 | { |
2777 | int i, j; | |
2778 | int rv; | |
393d2cc3 | 2779 | ipmi_smi_t intf; |
bca0324d | 2780 | ipmi_smi_t tintf; |
bca0324d | 2781 | struct list_head *link; |
1da177e4 | 2782 | |
c70d7499 CM |
2783 | /* |
2784 | * Make sure the driver is actually initialized, this handles | |
2785 | * problems with initialization order. | |
2786 | */ | |
1da177e4 LT |
2787 | if (!initialized) { |
2788 | rv = ipmi_init_msghandler(); | |
2789 | if (rv) | |
2790 | return rv; | |
c70d7499 CM |
2791 | /* |
2792 | * The init code doesn't return an error if it was turned | |
2793 | * off, but it won't initialize. Check that. | |
2794 | */ | |
1da177e4 LT |
2795 | if (!initialized) |
2796 | return -ENODEV; | |
2797 | } | |
2798 | ||
dd00cc48 | 2799 | intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
393d2cc3 | 2800 | if (!intf) |
1da177e4 | 2801 | return -ENOMEM; |
b2c03941 CM |
2802 | |
2803 | intf->ipmi_version_major = ipmi_version_major(device_id); | |
2804 | intf->ipmi_version_minor = ipmi_version_minor(device_id); | |
2805 | ||
50c812b2 CM |
2806 | intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); |
2807 | if (!intf->bmc) { | |
2808 | kfree(intf); | |
2809 | return -ENOMEM; | |
2810 | } | |
bca0324d | 2811 | intf->intf_num = -1; /* Mark it invalid for now. */ |
393d2cc3 | 2812 | kref_init(&intf->refcount); |
50c812b2 CM |
2813 | intf->bmc->id = *device_id; |
2814 | intf->si_dev = si_dev; | |
393d2cc3 CM |
2815 | for (j = 0; j < IPMI_MAX_CHANNELS; j++) { |
2816 | intf->channels[j].address = IPMI_BMC_SLAVE_ADDR; | |
2817 | intf->channels[j].lun = 2; | |
2818 | } | |
2819 | if (slave_addr != 0) | |
2820 | intf->channels[0].address = slave_addr; | |
2821 | INIT_LIST_HEAD(&intf->users); | |
2822 | intf->handlers = handlers; | |
2823 | intf->send_info = send_info; | |
2824 | spin_lock_init(&intf->seq_lock); | |
2825 | for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) { | |
2826 | intf->seq_table[j].inuse = 0; | |
2827 | intf->seq_table[j].seqid = 0; | |
2828 | } | |
2829 | intf->curr_seq = 0; | |
2830 | #ifdef CONFIG_PROC_FS | |
ac019151 | 2831 | mutex_init(&intf->proc_entry_lock); |
393d2cc3 | 2832 | #endif |
65be7544 CM |
2833 | spin_lock_init(&intf->waiting_rcv_msgs_lock); |
2834 | INIT_LIST_HEAD(&intf->waiting_rcv_msgs); | |
7adf579c CM |
2835 | tasklet_init(&intf->recv_tasklet, |
2836 | smi_recv_tasklet, | |
2837 | (unsigned long) intf); | |
2838 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); | |
7ea0ed2b CM |
2839 | spin_lock_init(&intf->xmit_msgs_lock); |
2840 | INIT_LIST_HEAD(&intf->xmit_msgs); | |
2841 | INIT_LIST_HEAD(&intf->hp_xmit_msgs); | |
393d2cc3 | 2842 | spin_lock_init(&intf->events_lock); |
89986496 CM |
2843 | atomic_set(&intf->event_waiters, 0); |
2844 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
393d2cc3 CM |
2845 | INIT_LIST_HEAD(&intf->waiting_events); |
2846 | intf->waiting_events_count = 0; | |
d6dfd131 | 2847 | mutex_init(&intf->cmd_rcvrs_mutex); |
b9675136 | 2848 | spin_lock_init(&intf->maintenance_mode_lock); |
393d2cc3 CM |
2849 | INIT_LIST_HEAD(&intf->cmd_rcvrs); |
2850 | init_waitqueue_head(&intf->waitq); | |
b2655f26 KB |
2851 | for (i = 0; i < IPMI_NUM_STATS; i++) |
2852 | atomic_set(&intf->stats[i], 0); | |
393d2cc3 | 2853 | |
393d2cc3 | 2854 | intf->proc_dir = NULL; |
1da177e4 | 2855 | |
b2c03941 | 2856 | mutex_lock(&smi_watchers_mutex); |
bca0324d CM |
2857 | mutex_lock(&ipmi_interfaces_mutex); |
2858 | /* Look for a hole in the numbers. */ | |
2859 | i = 0; | |
2860 | link = &ipmi_interfaces; | |
2861 | list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) { | |
2862 | if (tintf->intf_num != i) { | |
2863 | link = &tintf->link; | |
1da177e4 LT |
2864 | break; |
2865 | } | |
bca0324d | 2866 | i++; |
1da177e4 | 2867 | } |
bca0324d CM |
2868 | /* Add the new interface in numeric order. */ |
2869 | if (i == 0) | |
2870 | list_add_rcu(&intf->link, &ipmi_interfaces); | |
2871 | else | |
2872 | list_add_tail_rcu(&intf->link, link); | |
1da177e4 | 2873 | |
453823ba CM |
2874 | rv = handlers->start_processing(send_info, intf); |
2875 | if (rv) | |
2876 | goto out; | |
1da177e4 | 2877 | |
50c812b2 CM |
2878 | get_guid(intf); |
2879 | ||
b2c03941 | 2880 | if ((intf->ipmi_version_major > 1) |
c70d7499 CM |
2881 | || ((intf->ipmi_version_major == 1) |
2882 | && (intf->ipmi_version_minor >= 5))) { | |
2883 | /* | |
2884 | * Start scanning the channels to see what is | |
2885 | * available. | |
2886 | */ | |
393d2cc3 CM |
2887 | intf->null_user_handler = channel_handler; |
2888 | intf->curr_channel = 0; | |
2889 | rv = send_channel_info_cmd(intf, 0); | |
1f668423 CM |
2890 | if (rv) { |
2891 | printk(KERN_WARNING PFX | |
2892 | "Error sending channel information for channel" | |
2893 | " 0, %d\n", rv); | |
393d2cc3 | 2894 | goto out; |
1f668423 | 2895 | } |
1da177e4 | 2896 | |
393d2cc3 CM |
2897 | /* Wait for the channel info to be read. */ |
2898 | wait_event(intf->waitq, | |
2899 | intf->curr_channel >= IPMI_MAX_CHANNELS); | |
50c812b2 | 2900 | intf->null_user_handler = NULL; |
393d2cc3 CM |
2901 | } else { |
2902 | /* Assume a single IPMB channel at zero. */ | |
2903 | intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB; | |
2904 | intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB; | |
9a2845c4 | 2905 | intf->curr_channel = IPMI_MAX_CHANNELS; |
1da177e4 LT |
2906 | } |
2907 | ||
393d2cc3 CM |
2908 | if (rv == 0) |
2909 | rv = add_proc_entries(intf, i); | |
1da177e4 | 2910 | |
5a0e10ec | 2911 | rv = ipmi_bmc_register(intf, i); |
50c812b2 | 2912 | |
393d2cc3 | 2913 | out: |
1da177e4 | 2914 | if (rv) { |
393d2cc3 CM |
2915 | if (intf->proc_dir) |
2916 | remove_proc_entries(intf); | |
b2c03941 | 2917 | intf->handlers = NULL; |
bca0324d CM |
2918 | list_del_rcu(&intf->link); |
2919 | mutex_unlock(&ipmi_interfaces_mutex); | |
b2c03941 | 2920 | mutex_unlock(&smi_watchers_mutex); |
bca0324d | 2921 | synchronize_rcu(); |
393d2cc3 | 2922 | kref_put(&intf->refcount, intf_free); |
393d2cc3 | 2923 | } else { |
78ba2faf CM |
2924 | /* |
2925 | * Keep memory order straight for RCU readers. Make | |
2926 | * sure everything else is committed to memory before | |
2927 | * setting intf_num to mark the interface valid. | |
2928 | */ | |
2929 | smp_wmb(); | |
bca0324d CM |
2930 | intf->intf_num = i; |
2931 | mutex_unlock(&ipmi_interfaces_mutex); | |
78ba2faf | 2932 | /* After this point the interface is legal to use. */ |
50c812b2 | 2933 | call_smi_watchers(i, intf->si_dev); |
b2c03941 | 2934 | mutex_unlock(&smi_watchers_mutex); |
1da177e4 LT |
2935 | } |
2936 | ||
2937 | return rv; | |
2938 | } | |
c70d7499 | 2939 | EXPORT_SYMBOL(ipmi_register_smi); |
1da177e4 | 2940 | |
7ea0ed2b CM |
2941 | static void deliver_smi_err_response(ipmi_smi_t intf, |
2942 | struct ipmi_smi_msg *msg, | |
2943 | unsigned char err) | |
2944 | { | |
2945 | msg->rsp[0] = msg->data[0] | 4; | |
2946 | msg->rsp[1] = msg->data[1]; | |
2947 | msg->rsp[2] = err; | |
2948 | msg->rsp_size = 3; | |
2949 | /* It's an error, so it will never requeue, no need to check return. */ | |
2950 | handle_one_recv_msg(intf, msg); | |
2951 | } | |
2952 | ||
b2c03941 CM |
2953 | static void cleanup_smi_msgs(ipmi_smi_t intf) |
2954 | { | |
2955 | int i; | |
2956 | struct seq_table *ent; | |
7ea0ed2b CM |
2957 | struct ipmi_smi_msg *msg; |
2958 | struct list_head *entry; | |
2959 | struct list_head tmplist; | |
2960 | ||
2961 | /* Clear out our transmit queues and hold the messages. */ | |
2962 | INIT_LIST_HEAD(&tmplist); | |
2963 | list_splice_tail(&intf->hp_xmit_msgs, &tmplist); | |
2964 | list_splice_tail(&intf->xmit_msgs, &tmplist); | |
2965 | ||
2966 | /* Current message first, to preserve order */ | |
2967 | while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) { | |
2968 | /* Wait for the message to clear out. */ | |
2969 | schedule_timeout(1); | |
2970 | } | |
b2c03941 CM |
2971 | |
2972 | /* No need for locks, the interface is down. */ | |
7ea0ed2b CM |
2973 | |
2974 | /* | |
2975 | * Return errors for all pending messages in queue and in the | |
2976 | * tables waiting for remote responses. | |
2977 | */ | |
2978 | while (!list_empty(&tmplist)) { | |
2979 | entry = tmplist.next; | |
2980 | list_del(entry); | |
2981 | msg = list_entry(entry, struct ipmi_smi_msg, link); | |
2982 | deliver_smi_err_response(intf, msg, IPMI_ERR_UNSPECIFIED); | |
2983 | } | |
2984 | ||
b2c03941 CM |
2985 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) { |
2986 | ent = &(intf->seq_table[i]); | |
2987 | if (!ent->inuse) | |
2988 | continue; | |
2989 | deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED); | |
2990 | } | |
2991 | } | |
2992 | ||
1da177e4 LT |
2993 | int ipmi_unregister_smi(ipmi_smi_t intf) |
2994 | { | |
1da177e4 | 2995 | struct ipmi_smi_watcher *w; |
7ea0ed2b CM |
2996 | int intf_num = intf->intf_num; |
2997 | ipmi_user_t user; | |
1da177e4 | 2998 | |
50c812b2 CM |
2999 | ipmi_bmc_unregister(intf); |
3000 | ||
b2c03941 | 3001 | mutex_lock(&smi_watchers_mutex); |
bca0324d | 3002 | mutex_lock(&ipmi_interfaces_mutex); |
b2c03941 | 3003 | intf->intf_num = -1; |
7ea0ed2b | 3004 | intf->in_shutdown = true; |
bca0324d CM |
3005 | list_del_rcu(&intf->link); |
3006 | mutex_unlock(&ipmi_interfaces_mutex); | |
3007 | synchronize_rcu(); | |
1da177e4 | 3008 | |
b2c03941 CM |
3009 | cleanup_smi_msgs(intf); |
3010 | ||
7ea0ed2b CM |
3011 | /* Clean up the effects of users on the lower-level software. */ |
3012 | mutex_lock(&ipmi_interfaces_mutex); | |
3013 | rcu_read_lock(); | |
3014 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3015 | module_put(intf->handlers->owner); | |
3016 | if (intf->handlers->dec_usecount) | |
3017 | intf->handlers->dec_usecount(intf->send_info); | |
3018 | } | |
3019 | rcu_read_unlock(); | |
3020 | intf->handlers = NULL; | |
3021 | mutex_unlock(&ipmi_interfaces_mutex); | |
3022 | ||
393d2cc3 | 3023 | remove_proc_entries(intf); |
1da177e4 | 3024 | |
c70d7499 CM |
3025 | /* |
3026 | * Call all the watcher interfaces to tell them that | |
3027 | * an interface is gone. | |
3028 | */ | |
393d2cc3 | 3029 | list_for_each_entry(w, &smi_watchers, link) |
b2c03941 CM |
3030 | w->smi_gone(intf_num); |
3031 | mutex_unlock(&smi_watchers_mutex); | |
393d2cc3 | 3032 | |
393d2cc3 | 3033 | kref_put(&intf->refcount, intf_free); |
1da177e4 LT |
3034 | return 0; |
3035 | } | |
c70d7499 | 3036 | EXPORT_SYMBOL(ipmi_unregister_smi); |
1da177e4 LT |
3037 | |
3038 | static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf, | |
3039 | struct ipmi_smi_msg *msg) | |
3040 | { | |
3041 | struct ipmi_ipmb_addr ipmb_addr; | |
3042 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 | 3043 | |
c70d7499 CM |
3044 | /* |
3045 | * This is 11, not 10, because the response must contain a | |
3046 | * completion code. | |
3047 | */ | |
1da177e4 LT |
3048 | if (msg->rsp_size < 11) { |
3049 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3050 | ipmi_inc_stat(intf, invalid_ipmb_responses); |
1da177e4 LT |
3051 | return 0; |
3052 | } | |
3053 | ||
3054 | if (msg->rsp[2] != 0) { | |
3055 | /* An error getting the response, just ignore it. */ | |
3056 | return 0; | |
3057 | } | |
3058 | ||
3059 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
3060 | ipmb_addr.slave_addr = msg->rsp[6]; | |
3061 | ipmb_addr.channel = msg->rsp[3] & 0x0f; | |
3062 | ipmb_addr.lun = msg->rsp[7] & 3; | |
3063 | ||
c70d7499 CM |
3064 | /* |
3065 | * It's a response from a remote entity. Look up the sequence | |
3066 | * number and handle the response. | |
3067 | */ | |
1da177e4 LT |
3068 | if (intf_find_seq(intf, |
3069 | msg->rsp[7] >> 2, | |
3070 | msg->rsp[3] & 0x0f, | |
3071 | msg->rsp[8], | |
3072 | (msg->rsp[4] >> 2) & (~1), | |
3073 | (struct ipmi_addr *) &(ipmb_addr), | |
c70d7499 CM |
3074 | &recv_msg)) { |
3075 | /* | |
3076 | * We were unable to find the sequence number, | |
3077 | * so just nuke the message. | |
3078 | */ | |
b2655f26 | 3079 | ipmi_inc_stat(intf, unhandled_ipmb_responses); |
1da177e4 LT |
3080 | return 0; |
3081 | } | |
3082 | ||
3083 | memcpy(recv_msg->msg_data, | |
3084 | &(msg->rsp[9]), | |
3085 | msg->rsp_size - 9); | |
c70d7499 CM |
3086 | /* |
3087 | * The other fields matched, so no need to set them, except | |
3088 | * for netfn, which needs to be the response that was | |
3089 | * returned, not the request value. | |
3090 | */ | |
1da177e4 LT |
3091 | recv_msg->msg.netfn = msg->rsp[4] >> 2; |
3092 | recv_msg->msg.data = recv_msg->msg_data; | |
3093 | recv_msg->msg.data_len = msg->rsp_size - 10; | |
3094 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3095 | ipmi_inc_stat(intf, handled_ipmb_responses); |
1da177e4 LT |
3096 | deliver_response(recv_msg); |
3097 | ||
3098 | return 0; | |
3099 | } | |
3100 | ||
3101 | static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf, | |
3102 | struct ipmi_smi_msg *msg) | |
3103 | { | |
393d2cc3 CM |
3104 | struct cmd_rcvr *rcvr; |
3105 | int rv = 0; | |
3106 | unsigned char netfn; | |
3107 | unsigned char cmd; | |
c69c3127 | 3108 | unsigned char chan; |
393d2cc3 CM |
3109 | ipmi_user_t user = NULL; |
3110 | struct ipmi_ipmb_addr *ipmb_addr; | |
3111 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3112 | |
3113 | if (msg->rsp_size < 10) { | |
3114 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3115 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3116 | return 0; |
3117 | } | |
3118 | ||
3119 | if (msg->rsp[2] != 0) { | |
3120 | /* An error getting the response, just ignore it. */ | |
3121 | return 0; | |
3122 | } | |
3123 | ||
3124 | netfn = msg->rsp[4] >> 2; | |
3125 | cmd = msg->rsp[8]; | |
c69c3127 | 3126 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3127 | |
e61fb5b6 | 3128 | rcu_read_lock(); |
c69c3127 | 3129 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3130 | if (rcvr) { |
3131 | user = rcvr->user; | |
3132 | kref_get(&user->refcount); | |
3133 | } else | |
3134 | user = NULL; | |
e61fb5b6 | 3135 | rcu_read_unlock(); |
1da177e4 LT |
3136 | |
3137 | if (user == NULL) { | |
3138 | /* We didn't find a user, deliver an error response. */ | |
b2655f26 | 3139 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 LT |
3140 | |
3141 | msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
3142 | msg->data[1] = IPMI_SEND_MSG_CMD; | |
3143 | msg->data[2] = msg->rsp[3]; | |
3144 | msg->data[3] = msg->rsp[6]; | |
c70d7499 | 3145 | msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3); |
1da177e4 | 3146 | msg->data[5] = ipmb_checksum(&(msg->data[3]), 2); |
c14979b9 | 3147 | msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address; |
c70d7499 CM |
3148 | /* rqseq/lun */ |
3149 | msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3); | |
1da177e4 LT |
3150 | msg->data[8] = msg->rsp[8]; /* cmd */ |
3151 | msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE; | |
3152 | msg->data[10] = ipmb_checksum(&(msg->data[6]), 4); | |
3153 | msg->data_size = 11; | |
3154 | ||
3155 | #ifdef DEBUG_MSGING | |
3156 | { | |
3157 | int m; | |
3158 | printk("Invalid command:"); | |
e8b33617 | 3159 | for (m = 0; m < msg->data_size; m++) |
1da177e4 LT |
3160 | printk(" %2.2x", msg->data[m]); |
3161 | printk("\n"); | |
3162 | } | |
3163 | #endif | |
b2c03941 | 3164 | rcu_read_lock(); |
7ea0ed2b CM |
3165 | if (!intf->in_shutdown) { |
3166 | smi_send(intf, intf->handlers, msg, 0); | |
c70d7499 CM |
3167 | /* |
3168 | * We used the message, so return the value | |
3169 | * that causes it to not be freed or | |
3170 | * queued. | |
3171 | */ | |
b2c03941 CM |
3172 | rv = -1; |
3173 | } | |
3174 | rcu_read_unlock(); | |
1da177e4 LT |
3175 | } else { |
3176 | /* Deliver the message to the user. */ | |
b2655f26 | 3177 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3178 | |
3179 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3180 | if (!recv_msg) { |
c70d7499 CM |
3181 | /* |
3182 | * We couldn't allocate memory for the | |
3183 | * message, so requeue it for handling | |
3184 | * later. | |
3185 | */ | |
1da177e4 | 3186 | rv = 1; |
393d2cc3 | 3187 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3188 | } else { |
3189 | /* Extract the source address from the data. */ | |
3190 | ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr; | |
3191 | ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE; | |
3192 | ipmb_addr->slave_addr = msg->rsp[6]; | |
3193 | ipmb_addr->lun = msg->rsp[7] & 3; | |
3194 | ipmb_addr->channel = msg->rsp[3] & 0xf; | |
3195 | ||
c70d7499 CM |
3196 | /* |
3197 | * Extract the rest of the message information | |
3198 | * from the IPMB header. | |
3199 | */ | |
1da177e4 LT |
3200 | recv_msg->user = user; |
3201 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3202 | recv_msg->msgid = msg->rsp[7] >> 2; | |
3203 | recv_msg->msg.netfn = msg->rsp[4] >> 2; | |
3204 | recv_msg->msg.cmd = msg->rsp[8]; | |
3205 | recv_msg->msg.data = recv_msg->msg_data; | |
3206 | ||
c70d7499 CM |
3207 | /* |
3208 | * We chop off 10, not 9 bytes because the checksum | |
3209 | * at the end also needs to be removed. | |
3210 | */ | |
1da177e4 LT |
3211 | recv_msg->msg.data_len = msg->rsp_size - 10; |
3212 | memcpy(recv_msg->msg_data, | |
3213 | &(msg->rsp[9]), | |
3214 | msg->rsp_size - 10); | |
3215 | deliver_response(recv_msg); | |
3216 | } | |
3217 | } | |
3218 | ||
3219 | return rv; | |
3220 | } | |
3221 | ||
3222 | static int handle_lan_get_msg_rsp(ipmi_smi_t intf, | |
3223 | struct ipmi_smi_msg *msg) | |
3224 | { | |
3225 | struct ipmi_lan_addr lan_addr; | |
3226 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3227 | |
3228 | ||
c70d7499 CM |
3229 | /* |
3230 | * This is 13, not 12, because the response must contain a | |
3231 | * completion code. | |
3232 | */ | |
1da177e4 LT |
3233 | if (msg->rsp_size < 13) { |
3234 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3235 | ipmi_inc_stat(intf, invalid_lan_responses); |
1da177e4 LT |
3236 | return 0; |
3237 | } | |
3238 | ||
3239 | if (msg->rsp[2] != 0) { | |
3240 | /* An error getting the response, just ignore it. */ | |
3241 | return 0; | |
3242 | } | |
3243 | ||
3244 | lan_addr.addr_type = IPMI_LAN_ADDR_TYPE; | |
3245 | lan_addr.session_handle = msg->rsp[4]; | |
3246 | lan_addr.remote_SWID = msg->rsp[8]; | |
3247 | lan_addr.local_SWID = msg->rsp[5]; | |
3248 | lan_addr.channel = msg->rsp[3] & 0x0f; | |
3249 | lan_addr.privilege = msg->rsp[3] >> 4; | |
3250 | lan_addr.lun = msg->rsp[9] & 3; | |
3251 | ||
c70d7499 CM |
3252 | /* |
3253 | * It's a response from a remote entity. Look up the sequence | |
3254 | * number and handle the response. | |
3255 | */ | |
1da177e4 LT |
3256 | if (intf_find_seq(intf, |
3257 | msg->rsp[9] >> 2, | |
3258 | msg->rsp[3] & 0x0f, | |
3259 | msg->rsp[10], | |
3260 | (msg->rsp[6] >> 2) & (~1), | |
3261 | (struct ipmi_addr *) &(lan_addr), | |
c70d7499 CM |
3262 | &recv_msg)) { |
3263 | /* | |
3264 | * We were unable to find the sequence number, | |
3265 | * so just nuke the message. | |
3266 | */ | |
b2655f26 | 3267 | ipmi_inc_stat(intf, unhandled_lan_responses); |
1da177e4 LT |
3268 | return 0; |
3269 | } | |
3270 | ||
3271 | memcpy(recv_msg->msg_data, | |
3272 | &(msg->rsp[11]), | |
3273 | msg->rsp_size - 11); | |
c70d7499 CM |
3274 | /* |
3275 | * The other fields matched, so no need to set them, except | |
3276 | * for netfn, which needs to be the response that was | |
3277 | * returned, not the request value. | |
3278 | */ | |
1da177e4 LT |
3279 | recv_msg->msg.netfn = msg->rsp[6] >> 2; |
3280 | recv_msg->msg.data = recv_msg->msg_data; | |
3281 | recv_msg->msg.data_len = msg->rsp_size - 12; | |
3282 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; | |
b2655f26 | 3283 | ipmi_inc_stat(intf, handled_lan_responses); |
1da177e4 LT |
3284 | deliver_response(recv_msg); |
3285 | ||
3286 | return 0; | |
3287 | } | |
3288 | ||
3289 | static int handle_lan_get_msg_cmd(ipmi_smi_t intf, | |
3290 | struct ipmi_smi_msg *msg) | |
3291 | { | |
393d2cc3 CM |
3292 | struct cmd_rcvr *rcvr; |
3293 | int rv = 0; | |
3294 | unsigned char netfn; | |
3295 | unsigned char cmd; | |
c69c3127 | 3296 | unsigned char chan; |
393d2cc3 CM |
3297 | ipmi_user_t user = NULL; |
3298 | struct ipmi_lan_addr *lan_addr; | |
3299 | struct ipmi_recv_msg *recv_msg; | |
1da177e4 LT |
3300 | |
3301 | if (msg->rsp_size < 12) { | |
3302 | /* Message not big enough, just ignore it. */ | |
b2655f26 | 3303 | ipmi_inc_stat(intf, invalid_commands); |
1da177e4 LT |
3304 | return 0; |
3305 | } | |
3306 | ||
3307 | if (msg->rsp[2] != 0) { | |
3308 | /* An error getting the response, just ignore it. */ | |
3309 | return 0; | |
3310 | } | |
3311 | ||
3312 | netfn = msg->rsp[6] >> 2; | |
3313 | cmd = msg->rsp[10]; | |
c69c3127 | 3314 | chan = msg->rsp[3] & 0xf; |
1da177e4 | 3315 | |
e61fb5b6 | 3316 | rcu_read_lock(); |
c69c3127 | 3317 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); |
393d2cc3 CM |
3318 | if (rcvr) { |
3319 | user = rcvr->user; | |
3320 | kref_get(&user->refcount); | |
3321 | } else | |
3322 | user = NULL; | |
e61fb5b6 | 3323 | rcu_read_unlock(); |
1da177e4 LT |
3324 | |
3325 | if (user == NULL) { | |
393d2cc3 | 3326 | /* We didn't find a user, just give up. */ |
b2655f26 | 3327 | ipmi_inc_stat(intf, unhandled_commands); |
1da177e4 | 3328 | |
c70d7499 CM |
3329 | /* |
3330 | * Don't do anything with these messages, just allow | |
3331 | * them to be freed. | |
3332 | */ | |
3333 | rv = 0; | |
1da177e4 LT |
3334 | } else { |
3335 | /* Deliver the message to the user. */ | |
b2655f26 | 3336 | ipmi_inc_stat(intf, handled_commands); |
1da177e4 LT |
3337 | |
3338 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3339 | if (!recv_msg) { |
c70d7499 CM |
3340 | /* |
3341 | * We couldn't allocate memory for the | |
3342 | * message, so requeue it for handling later. | |
3343 | */ | |
1da177e4 | 3344 | rv = 1; |
393d2cc3 | 3345 | kref_put(&user->refcount, free_user); |
1da177e4 LT |
3346 | } else { |
3347 | /* Extract the source address from the data. */ | |
3348 | lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr; | |
3349 | lan_addr->addr_type = IPMI_LAN_ADDR_TYPE; | |
3350 | lan_addr->session_handle = msg->rsp[4]; | |
3351 | lan_addr->remote_SWID = msg->rsp[8]; | |
3352 | lan_addr->local_SWID = msg->rsp[5]; | |
3353 | lan_addr->lun = msg->rsp[9] & 3; | |
3354 | lan_addr->channel = msg->rsp[3] & 0xf; | |
3355 | lan_addr->privilege = msg->rsp[3] >> 4; | |
3356 | ||
c70d7499 CM |
3357 | /* |
3358 | * Extract the rest of the message information | |
3359 | * from the IPMB header. | |
3360 | */ | |
1da177e4 LT |
3361 | recv_msg->user = user; |
3362 | recv_msg->recv_type = IPMI_CMD_RECV_TYPE; | |
3363 | recv_msg->msgid = msg->rsp[9] >> 2; | |
3364 | recv_msg->msg.netfn = msg->rsp[6] >> 2; | |
3365 | recv_msg->msg.cmd = msg->rsp[10]; | |
3366 | recv_msg->msg.data = recv_msg->msg_data; | |
3367 | ||
c70d7499 CM |
3368 | /* |
3369 | * We chop off 12, not 11 bytes because the checksum | |
3370 | * at the end also needs to be removed. | |
3371 | */ | |
1da177e4 LT |
3372 | recv_msg->msg.data_len = msg->rsp_size - 12; |
3373 | memcpy(recv_msg->msg_data, | |
3374 | &(msg->rsp[11]), | |
3375 | msg->rsp_size - 12); | |
3376 | deliver_response(recv_msg); | |
3377 | } | |
3378 | } | |
3379 | ||
3380 | return rv; | |
3381 | } | |
3382 | ||
4dec302f | 3383 | /* |
3384 | * This routine will handle "Get Message" command responses with | |
3385 | * channels that use an OEM Medium. The message format belongs to | |
3386 | * the OEM. See IPMI 2.0 specification, Chapter 6 and | |
3387 | * Chapter 22, sections 22.6 and 22.24 for more details. | |
3388 | */ | |
3389 | static int handle_oem_get_msg_cmd(ipmi_smi_t intf, | |
3390 | struct ipmi_smi_msg *msg) | |
3391 | { | |
3392 | struct cmd_rcvr *rcvr; | |
3393 | int rv = 0; | |
3394 | unsigned char netfn; | |
3395 | unsigned char cmd; | |
3396 | unsigned char chan; | |
3397 | ipmi_user_t user = NULL; | |
3398 | struct ipmi_system_interface_addr *smi_addr; | |
3399 | struct ipmi_recv_msg *recv_msg; | |
3400 | ||
3401 | /* | |
3402 | * We expect the OEM SW to perform error checking | |
3403 | * so we just do some basic sanity checks | |
3404 | */ | |
3405 | if (msg->rsp_size < 4) { | |
3406 | /* Message not big enough, just ignore it. */ | |
3407 | ipmi_inc_stat(intf, invalid_commands); | |
3408 | return 0; | |
3409 | } | |
3410 | ||
3411 | if (msg->rsp[2] != 0) { | |
3412 | /* An error getting the response, just ignore it. */ | |
3413 | return 0; | |
3414 | } | |
3415 | ||
3416 | /* | |
3417 | * This is an OEM Message so the OEM needs to know how | |
3418 | * handle the message. We do no interpretation. | |
3419 | */ | |
3420 | netfn = msg->rsp[0] >> 2; | |
3421 | cmd = msg->rsp[1]; | |
3422 | chan = msg->rsp[3] & 0xf; | |
3423 | ||
3424 | rcu_read_lock(); | |
3425 | rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); | |
3426 | if (rcvr) { | |
3427 | user = rcvr->user; | |
3428 | kref_get(&user->refcount); | |
3429 | } else | |
3430 | user = NULL; | |
3431 | rcu_read_unlock(); | |
3432 | ||
3433 | if (user == NULL) { | |
3434 | /* We didn't find a user, just give up. */ | |
3435 | ipmi_inc_stat(intf, unhandled_commands); | |
3436 | ||
3437 | /* | |
3438 | * Don't do anything with these messages, just allow | |
3439 | * them to be freed. | |
3440 | */ | |
3441 | ||
3442 | rv = 0; | |
3443 | } else { | |
3444 | /* Deliver the message to the user. */ | |
3445 | ipmi_inc_stat(intf, handled_commands); | |
3446 | ||
3447 | recv_msg = ipmi_alloc_recv_msg(); | |
3448 | if (!recv_msg) { | |
3449 | /* | |
3450 | * We couldn't allocate memory for the | |
3451 | * message, so requeue it for handling | |
3452 | * later. | |
3453 | */ | |
3454 | rv = 1; | |
3455 | kref_put(&user->refcount, free_user); | |
3456 | } else { | |
3457 | /* | |
3458 | * OEM Messages are expected to be delivered via | |
3459 | * the system interface to SMS software. We might | |
3460 | * need to visit this again depending on OEM | |
3461 | * requirements | |
3462 | */ | |
3463 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3464 | &(recv_msg->addr)); | |
3465 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3466 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3467 | smi_addr->lun = msg->rsp[0] & 3; | |
3468 | ||
3469 | recv_msg->user = user; | |
3470 | recv_msg->user_msg_data = NULL; | |
3471 | recv_msg->recv_type = IPMI_OEM_RECV_TYPE; | |
3472 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3473 | recv_msg->msg.cmd = msg->rsp[1]; | |
3474 | recv_msg->msg.data = recv_msg->msg_data; | |
3475 | ||
3476 | /* | |
3477 | * The message starts at byte 4 which follows the | |
3478 | * the Channel Byte in the "GET MESSAGE" command | |
3479 | */ | |
3480 | recv_msg->msg.data_len = msg->rsp_size - 4; | |
3481 | memcpy(recv_msg->msg_data, | |
3482 | &(msg->rsp[4]), | |
3483 | msg->rsp_size - 4); | |
3484 | deliver_response(recv_msg); | |
3485 | } | |
3486 | } | |
3487 | ||
3488 | return rv; | |
3489 | } | |
3490 | ||
1da177e4 LT |
3491 | static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, |
3492 | struct ipmi_smi_msg *msg) | |
3493 | { | |
3494 | struct ipmi_system_interface_addr *smi_addr; | |
c70d7499 | 3495 | |
1da177e4 LT |
3496 | recv_msg->msgid = 0; |
3497 | smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr); | |
3498 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3499 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3500 | smi_addr->lun = msg->rsp[0] & 3; | |
3501 | recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE; | |
3502 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3503 | recv_msg->msg.cmd = msg->rsp[1]; | |
3504 | memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3); | |
3505 | recv_msg->msg.data = recv_msg->msg_data; | |
3506 | recv_msg->msg.data_len = msg->rsp_size - 3; | |
3507 | } | |
3508 | ||
1da177e4 LT |
3509 | static int handle_read_event_rsp(ipmi_smi_t intf, |
3510 | struct ipmi_smi_msg *msg) | |
3511 | { | |
3512 | struct ipmi_recv_msg *recv_msg, *recv_msg2; | |
3513 | struct list_head msgs; | |
3514 | ipmi_user_t user; | |
3515 | int rv = 0; | |
3516 | int deliver_count = 0; | |
3517 | unsigned long flags; | |
3518 | ||
3519 | if (msg->rsp_size < 19) { | |
3520 | /* Message is too small to be an IPMB event. */ | |
b2655f26 | 3521 | ipmi_inc_stat(intf, invalid_events); |
1da177e4 LT |
3522 | return 0; |
3523 | } | |
3524 | ||
3525 | if (msg->rsp[2] != 0) { | |
3526 | /* An error getting the event, just ignore it. */ | |
3527 | return 0; | |
3528 | } | |
3529 | ||
3530 | INIT_LIST_HEAD(&msgs); | |
3531 | ||
393d2cc3 | 3532 | spin_lock_irqsave(&intf->events_lock, flags); |
1da177e4 | 3533 | |
b2655f26 | 3534 | ipmi_inc_stat(intf, events); |
1da177e4 | 3535 | |
c70d7499 CM |
3536 | /* |
3537 | * Allocate and fill in one message for every user that is | |
3538 | * getting events. | |
3539 | */ | |
393d2cc3 CM |
3540 | rcu_read_lock(); |
3541 | list_for_each_entry_rcu(user, &intf->users, link) { | |
8a3628d5 | 3542 | if (!user->gets_events) |
1da177e4 LT |
3543 | continue; |
3544 | ||
3545 | recv_msg = ipmi_alloc_recv_msg(); | |
8a3628d5 | 3546 | if (!recv_msg) { |
393d2cc3 | 3547 | rcu_read_unlock(); |
8a3628d5 CM |
3548 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, |
3549 | link) { | |
1da177e4 LT |
3550 | list_del(&recv_msg->link); |
3551 | ipmi_free_recv_msg(recv_msg); | |
3552 | } | |
c70d7499 CM |
3553 | /* |
3554 | * We couldn't allocate memory for the | |
3555 | * message, so requeue it for handling | |
3556 | * later. | |
3557 | */ | |
1da177e4 LT |
3558 | rv = 1; |
3559 | goto out; | |
3560 | } | |
3561 | ||
3562 | deliver_count++; | |
3563 | ||
3564 | copy_event_into_recv_msg(recv_msg, msg); | |
3565 | recv_msg->user = user; | |
393d2cc3 | 3566 | kref_get(&user->refcount); |
1da177e4 LT |
3567 | list_add_tail(&(recv_msg->link), &msgs); |
3568 | } | |
393d2cc3 | 3569 | rcu_read_unlock(); |
1da177e4 LT |
3570 | |
3571 | if (deliver_count) { | |
3572 | /* Now deliver all the messages. */ | |
3573 | list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) { | |
3574 | list_del(&recv_msg->link); | |
3575 | deliver_response(recv_msg); | |
3576 | } | |
3577 | } else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) { | |
c70d7499 CM |
3578 | /* |
3579 | * No one to receive the message, put it in queue if there's | |
3580 | * not already too many things in the queue. | |
3581 | */ | |
1da177e4 | 3582 | recv_msg = ipmi_alloc_recv_msg(); |
8a3628d5 | 3583 | if (!recv_msg) { |
c70d7499 CM |
3584 | /* |
3585 | * We couldn't allocate memory for the | |
3586 | * message, so requeue it for handling | |
3587 | * later. | |
3588 | */ | |
1da177e4 LT |
3589 | rv = 1; |
3590 | goto out; | |
3591 | } | |
3592 | ||
3593 | copy_event_into_recv_msg(recv_msg, msg); | |
3594 | list_add_tail(&(recv_msg->link), &(intf->waiting_events)); | |
4791c03d | 3595 | intf->waiting_events_count++; |
87ebd06f | 3596 | } else if (!intf->event_msg_printed) { |
c70d7499 CM |
3597 | /* |
3598 | * There's too many things in the queue, discard this | |
3599 | * message. | |
3600 | */ | |
87ebd06f CM |
3601 | printk(KERN_WARNING PFX "Event queue full, discarding" |
3602 | " incoming events\n"); | |
3603 | intf->event_msg_printed = 1; | |
1da177e4 LT |
3604 | } |
3605 | ||
3606 | out: | |
3607 | spin_unlock_irqrestore(&(intf->events_lock), flags); | |
3608 | ||
3609 | return rv; | |
3610 | } | |
3611 | ||
3612 | static int handle_bmc_rsp(ipmi_smi_t intf, | |
3613 | struct ipmi_smi_msg *msg) | |
3614 | { | |
3615 | struct ipmi_recv_msg *recv_msg; | |
393d2cc3 | 3616 | struct ipmi_user *user; |
1da177e4 LT |
3617 | |
3618 | recv_msg = (struct ipmi_recv_msg *) msg->user_data; | |
c70d7499 CM |
3619 | if (recv_msg == NULL) { |
3620 | printk(KERN_WARNING | |
3621 | "IPMI message received with no owner. This\n" | |
3622 | "could be because of a malformed message, or\n" | |
3623 | "because of a hardware error. Contact your\n" | |
3624 | "hardware vender for assistance\n"); | |
56a55ec6 CM |
3625 | return 0; |
3626 | } | |
1da177e4 | 3627 | |
393d2cc3 | 3628 | user = recv_msg->user; |
1da177e4 | 3629 | /* Make sure the user still exists. */ |
393d2cc3 | 3630 | if (user && !user->valid) { |
56a55ec6 | 3631 | /* The user for the message went away, so give up. */ |
b2655f26 | 3632 | ipmi_inc_stat(intf, unhandled_local_responses); |
1da177e4 LT |
3633 | ipmi_free_recv_msg(recv_msg); |
3634 | } else { | |
3635 | struct ipmi_system_interface_addr *smi_addr; | |
3636 | ||
b2655f26 | 3637 | ipmi_inc_stat(intf, handled_local_responses); |
1da177e4 LT |
3638 | recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE; |
3639 | recv_msg->msgid = msg->msgid; | |
3640 | smi_addr = ((struct ipmi_system_interface_addr *) | |
3641 | &(recv_msg->addr)); | |
3642 | smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
3643 | smi_addr->channel = IPMI_BMC_CHANNEL; | |
3644 | smi_addr->lun = msg->rsp[0] & 3; | |
3645 | recv_msg->msg.netfn = msg->rsp[0] >> 2; | |
3646 | recv_msg->msg.cmd = msg->rsp[1]; | |
3647 | memcpy(recv_msg->msg_data, | |
3648 | &(msg->rsp[2]), | |
3649 | msg->rsp_size - 2); | |
3650 | recv_msg->msg.data = recv_msg->msg_data; | |
3651 | recv_msg->msg.data_len = msg->rsp_size - 2; | |
3652 | deliver_response(recv_msg); | |
3653 | } | |
3654 | ||
3655 | return 0; | |
3656 | } | |
3657 | ||
c70d7499 | 3658 | /* |
7adf579c | 3659 | * Handle a received message. Return 1 if the message should be requeued, |
c70d7499 CM |
3660 | * 0 if the message should be freed, or -1 if the message should not |
3661 | * be freed or requeued. | |
3662 | */ | |
7adf579c | 3663 | static int handle_one_recv_msg(ipmi_smi_t intf, |
1da177e4 LT |
3664 | struct ipmi_smi_msg *msg) |
3665 | { | |
3666 | int requeue; | |
3667 | int chan; | |
3668 | ||
3669 | #ifdef DEBUG_MSGING | |
3670 | int m; | |
3671 | printk("Recv:"); | |
e8b33617 | 3672 | for (m = 0; m < msg->rsp_size; m++) |
1da177e4 LT |
3673 | printk(" %2.2x", msg->rsp[m]); |
3674 | printk("\n"); | |
3675 | #endif | |
3676 | if (msg->rsp_size < 2) { | |
3677 | /* Message is too small to be correct. */ | |
3678 | printk(KERN_WARNING PFX "BMC returned to small a message" | |
3679 | " for netfn %x cmd %x, got %d bytes\n", | |
3680 | (msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size); | |
3681 | ||
3682 | /* Generate an error response for the message. */ | |
3683 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3684 | msg->rsp[1] = msg->data[1]; | |
3685 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3686 | msg->rsp_size = 3; | |
c70d7499 CM |
3687 | } else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1)) |
3688 | || (msg->rsp[1] != msg->data[1])) { | |
3689 | /* | |
3690 | * The NetFN and Command in the response is not even | |
3691 | * marginally correct. | |
3692 | */ | |
1da177e4 LT |
3693 | printk(KERN_WARNING PFX "BMC returned incorrect response," |
3694 | " expected netfn %x cmd %x, got netfn %x cmd %x\n", | |
3695 | (msg->data[0] >> 2) | 1, msg->data[1], | |
3696 | msg->rsp[0] >> 2, msg->rsp[1]); | |
3697 | ||
3698 | /* Generate an error response for the message. */ | |
3699 | msg->rsp[0] = msg->data[0] | (1 << 2); | |
3700 | msg->rsp[1] = msg->data[1]; | |
3701 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
3702 | msg->rsp_size = 3; | |
3703 | } | |
3704 | ||
3705 | if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
3706 | && (msg->rsp[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 CM |
3707 | && (msg->user_data != NULL)) { |
3708 | /* | |
3709 | * It's a response to a response we sent. For this we | |
3710 | * deliver a send message response to the user. | |
3711 | */ | |
393d2cc3 | 3712 | struct ipmi_recv_msg *recv_msg = msg->user_data; |
1da177e4 LT |
3713 | |
3714 | requeue = 0; | |
3715 | if (msg->rsp_size < 2) | |
3716 | /* Message is too small to be correct. */ | |
3717 | goto out; | |
3718 | ||
3719 | chan = msg->data[2] & 0x0f; | |
3720 | if (chan >= IPMI_MAX_CHANNELS) | |
3721 | /* Invalid channel number */ | |
3722 | goto out; | |
3723 | ||
393d2cc3 CM |
3724 | if (!recv_msg) |
3725 | goto out; | |
3726 | ||
3727 | /* Make sure the user still exists. */ | |
3728 | if (!recv_msg->user || !recv_msg->user->valid) | |
3729 | goto out; | |
3730 | ||
3731 | recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE; | |
3732 | recv_msg->msg.data = recv_msg->msg_data; | |
3733 | recv_msg->msg.data_len = 1; | |
3734 | recv_msg->msg_data[0] = msg->rsp[2]; | |
3735 | deliver_response(recv_msg); | |
1da177e4 | 3736 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) |
c70d7499 | 3737 | && (msg->rsp[1] == IPMI_GET_MSG_CMD)) { |
1da177e4 LT |
3738 | /* It's from the receive queue. */ |
3739 | chan = msg->rsp[3] & 0xf; | |
3740 | if (chan >= IPMI_MAX_CHANNELS) { | |
3741 | /* Invalid channel number */ | |
3742 | requeue = 0; | |
3743 | goto out; | |
3744 | } | |
3745 | ||
4dec302f | 3746 | /* |
9a2845c4 CM |
3747 | * We need to make sure the channels have been initialized. |
3748 | * The channel_handler routine will set the "curr_channel" | |
3749 | * equal to or greater than IPMI_MAX_CHANNELS when all the | |
3750 | * channels for this interface have been initialized. | |
3751 | */ | |
4dec302f | 3752 | if (intf->curr_channel < IPMI_MAX_CHANNELS) { |
9a2845c4 | 3753 | requeue = 0; /* Throw the message away */ |
4dec302f | 3754 | goto out; |
3755 | } | |
3756 | ||
1da177e4 LT |
3757 | switch (intf->channels[chan].medium) { |
3758 | case IPMI_CHANNEL_MEDIUM_IPMB: | |
3759 | if (msg->rsp[4] & 0x04) { | |
c70d7499 CM |
3760 | /* |
3761 | * It's a response, so find the | |
3762 | * requesting message and send it up. | |
3763 | */ | |
1da177e4 LT |
3764 | requeue = handle_ipmb_get_msg_rsp(intf, msg); |
3765 | } else { | |
c70d7499 CM |
3766 | /* |
3767 | * It's a command to the SMS from some other | |
3768 | * entity. Handle that. | |
3769 | */ | |
1da177e4 LT |
3770 | requeue = handle_ipmb_get_msg_cmd(intf, msg); |
3771 | } | |
3772 | break; | |
3773 | ||
3774 | case IPMI_CHANNEL_MEDIUM_8023LAN: | |
3775 | case IPMI_CHANNEL_MEDIUM_ASYNC: | |
3776 | if (msg->rsp[6] & 0x04) { | |
c70d7499 CM |
3777 | /* |
3778 | * It's a response, so find the | |
3779 | * requesting message and send it up. | |
3780 | */ | |
1da177e4 LT |
3781 | requeue = handle_lan_get_msg_rsp(intf, msg); |
3782 | } else { | |
c70d7499 CM |
3783 | /* |
3784 | * It's a command to the SMS from some other | |
3785 | * entity. Handle that. | |
3786 | */ | |
1da177e4 LT |
3787 | requeue = handle_lan_get_msg_cmd(intf, msg); |
3788 | } | |
3789 | break; | |
3790 | ||
3791 | default: | |
4dec302f | 3792 | /* Check for OEM Channels. Clients had better |
3793 | register for these commands. */ | |
3794 | if ((intf->channels[chan].medium | |
3795 | >= IPMI_CHANNEL_MEDIUM_OEM_MIN) | |
3796 | && (intf->channels[chan].medium | |
3797 | <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { | |
3798 | requeue = handle_oem_get_msg_cmd(intf, msg); | |
3799 | } else { | |
3800 | /* | |
3801 | * We don't handle the channel type, so just | |
3802 | * free the message. | |
3803 | */ | |
3804 | requeue = 0; | |
3805 | } | |
1da177e4 LT |
3806 | } |
3807 | ||
3808 | } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) | |
c70d7499 | 3809 | && (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) { |
b3834be5 | 3810 | /* It's an asynchronous event. */ |
1da177e4 LT |
3811 | requeue = handle_read_event_rsp(intf, msg); |
3812 | } else { | |
3813 | /* It's a response from the local BMC. */ | |
3814 | requeue = handle_bmc_rsp(intf, msg); | |
3815 | } | |
3816 | ||
3817 | out: | |
3818 | return requeue; | |
3819 | } | |
3820 | ||
7adf579c CM |
3821 | /* |
3822 | * If there are messages in the queue or pretimeouts, handle them. | |
3823 | */ | |
3824 | static void handle_new_recv_msgs(ipmi_smi_t intf) | |
3825 | { | |
3826 | struct ipmi_smi_msg *smi_msg; | |
3827 | unsigned long flags = 0; | |
3828 | int rv; | |
3829 | int run_to_completion = intf->run_to_completion; | |
3830 | ||
3831 | /* See if any waiting messages need to be processed. */ | |
3832 | if (!run_to_completion) | |
65be7544 CM |
3833 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
3834 | while (!list_empty(&intf->waiting_rcv_msgs)) { | |
3835 | smi_msg = list_entry(intf->waiting_rcv_msgs.next, | |
7adf579c | 3836 | struct ipmi_smi_msg, link); |
7adf579c | 3837 | if (!run_to_completion) |
65be7544 CM |
3838 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, |
3839 | flags); | |
7adf579c CM |
3840 | rv = handle_one_recv_msg(intf, smi_msg); |
3841 | if (!run_to_completion) | |
65be7544 | 3842 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); |
7ea0ed2b | 3843 | if (rv > 0) { |
7adf579c CM |
3844 | /* |
3845 | * To preserve message order, quit if we | |
3846 | * can't handle a message. | |
3847 | */ | |
7adf579c | 3848 | break; |
7ea0ed2b CM |
3849 | } else { |
3850 | list_del(&smi_msg->link); | |
3851 | if (rv == 0) | |
3852 | /* Message handled */ | |
3853 | ipmi_free_smi_msg(smi_msg); | |
3854 | /* If rv < 0, fatal error, del but don't free. */ | |
7adf579c CM |
3855 | } |
3856 | } | |
3857 | if (!run_to_completion) | |
65be7544 | 3858 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, flags); |
7adf579c CM |
3859 | |
3860 | /* | |
3861 | * If the pretimout count is non-zero, decrement one from it and | |
3862 | * deliver pretimeouts to all the users. | |
3863 | */ | |
3864 | if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) { | |
3865 | ipmi_user_t user; | |
3866 | ||
3867 | rcu_read_lock(); | |
3868 | list_for_each_entry_rcu(user, &intf->users, link) { | |
3869 | if (user->handler->ipmi_watchdog_pretimeout) | |
3870 | user->handler->ipmi_watchdog_pretimeout( | |
3871 | user->handler_data); | |
3872 | } | |
3873 | rcu_read_unlock(); | |
3874 | } | |
3875 | } | |
3876 | ||
3877 | static void smi_recv_tasklet(unsigned long val) | |
3878 | { | |
7ea0ed2b CM |
3879 | unsigned long flags = 0; /* keep us warning-free. */ |
3880 | ipmi_smi_t intf = (ipmi_smi_t) val; | |
3881 | int run_to_completion = intf->run_to_completion; | |
3882 | struct ipmi_smi_msg *newmsg = NULL; | |
3883 | ||
3884 | /* | |
3885 | * Start the next message if available. | |
3886 | * | |
3887 | * Do this here, not in the actual receiver, because we may deadlock | |
3888 | * because the lower layer is allowed to hold locks while calling | |
3889 | * message delivery. | |
3890 | */ | |
3891 | if (!run_to_completion) | |
3892 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); | |
3893 | if (intf->curr_msg == NULL && !intf->in_shutdown) { | |
3894 | struct list_head *entry = NULL; | |
3895 | ||
3896 | /* Pick the high priority queue first. */ | |
3897 | if (!list_empty(&intf->hp_xmit_msgs)) | |
3898 | entry = intf->hp_xmit_msgs.next; | |
3899 | else if (!list_empty(&intf->xmit_msgs)) | |
3900 | entry = intf->xmit_msgs.next; | |
3901 | ||
3902 | if (entry) { | |
3903 | list_del(entry); | |
3904 | newmsg = list_entry(entry, struct ipmi_smi_msg, link); | |
3905 | intf->curr_msg = newmsg; | |
3906 | } | |
3907 | } | |
3908 | if (!run_to_completion) | |
3909 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); | |
3910 | if (newmsg) | |
3911 | intf->handlers->sender(intf->send_info, newmsg, 0); | |
3912 | ||
3913 | handle_new_recv_msgs(intf); | |
7adf579c CM |
3914 | } |
3915 | ||
1da177e4 LT |
3916 | /* Handle a new message from the lower layer. */ |
3917 | void ipmi_smi_msg_received(ipmi_smi_t intf, | |
3918 | struct ipmi_smi_msg *msg) | |
3919 | { | |
5956dce1 | 3920 | unsigned long flags = 0; /* keep us warning-free. */ |
7ea0ed2b | 3921 | int run_to_completion = intf->run_to_completion; |
1da177e4 | 3922 | |
1da177e4 LT |
3923 | if ((msg->data_size >= 2) |
3924 | && (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2)) | |
3925 | && (msg->data[1] == IPMI_SEND_MSG_CMD) | |
c70d7499 | 3926 | && (msg->user_data == NULL)) { |
7ea0ed2b CM |
3927 | |
3928 | if (intf->in_shutdown) | |
3929 | goto free_msg; | |
3930 | ||
c70d7499 CM |
3931 | /* |
3932 | * This is the local response to a command send, start | |
3933 | * the timer for these. The user_data will not be | |
3934 | * NULL if this is a response send, and we will let | |
3935 | * response sends just go through. | |
3936 | */ | |
3937 | ||
3938 | /* | |
3939 | * Check for errors, if we get certain errors (ones | |
3940 | * that mean basically we can try again later), we | |
3941 | * ignore them and start the timer. Otherwise we | |
3942 | * report the error immediately. | |
3943 | */ | |
1da177e4 LT |
3944 | if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0) |
3945 | && (msg->rsp[2] != IPMI_NODE_BUSY_ERR) | |
46d52b09 CM |
3946 | && (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR) |
3947 | && (msg->rsp[2] != IPMI_BUS_ERR) | |
c70d7499 | 3948 | && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) { |
1da177e4 LT |
3949 | int chan = msg->rsp[3] & 0xf; |
3950 | ||
3951 | /* Got an error sending the message, handle it. */ | |
1da177e4 LT |
3952 | if (chan >= IPMI_MAX_CHANNELS) |
3953 | ; /* This shouldn't happen */ | |
3954 | else if ((intf->channels[chan].medium | |
3955 | == IPMI_CHANNEL_MEDIUM_8023LAN) | |
3956 | || (intf->channels[chan].medium | |
3957 | == IPMI_CHANNEL_MEDIUM_ASYNC)) | |
b2655f26 | 3958 | ipmi_inc_stat(intf, sent_lan_command_errs); |
1da177e4 | 3959 | else |
b2655f26 | 3960 | ipmi_inc_stat(intf, sent_ipmb_command_errs); |
1da177e4 | 3961 | intf_err_seq(intf, msg->msgid, msg->rsp[2]); |
c70d7499 | 3962 | } else |
1da177e4 LT |
3963 | /* The message was sent, start the timer. */ |
3964 | intf_start_seq_timer(intf, msg->msgid); | |
1da177e4 | 3965 | |
7ea0ed2b | 3966 | free_msg: |
1da177e4 | 3967 | ipmi_free_smi_msg(msg); |
7ea0ed2b CM |
3968 | } else { |
3969 | /* | |
3970 | * To preserve message order, we keep a queue and deliver from | |
3971 | * a tasklet. | |
3972 | */ | |
3973 | if (!run_to_completion) | |
3974 | spin_lock_irqsave(&intf->waiting_rcv_msgs_lock, flags); | |
3975 | list_add_tail(&msg->link, &intf->waiting_rcv_msgs); | |
3976 | if (!run_to_completion) | |
3977 | spin_unlock_irqrestore(&intf->waiting_rcv_msgs_lock, | |
3978 | flags); | |
1da177e4 LT |
3979 | } |
3980 | ||
5956dce1 | 3981 | if (!run_to_completion) |
7ea0ed2b CM |
3982 | spin_lock_irqsave(&intf->xmit_msgs_lock, flags); |
3983 | if (msg == intf->curr_msg) | |
3984 | intf->curr_msg = NULL; | |
5956dce1 | 3985 | if (!run_to_completion) |
7ea0ed2b | 3986 | spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags); |
c70d7499 | 3987 | |
7ea0ed2b CM |
3988 | if (run_to_completion) |
3989 | smi_recv_tasklet((unsigned long) intf); | |
3990 | else | |
3991 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 3992 | } |
c70d7499 | 3993 | EXPORT_SYMBOL(ipmi_smi_msg_received); |
1da177e4 LT |
3994 | |
3995 | void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf) | |
3996 | { | |
7ea0ed2b CM |
3997 | if (intf->in_shutdown) |
3998 | return; | |
3999 | ||
7adf579c CM |
4000 | atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1); |
4001 | tasklet_schedule(&intf->recv_tasklet); | |
1da177e4 | 4002 | } |
c70d7499 | 4003 | EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout); |
1da177e4 | 4004 | |
882fe011 CM |
4005 | static struct ipmi_smi_msg * |
4006 | smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, | |
4007 | unsigned char seq, long seqid) | |
1da177e4 | 4008 | { |
882fe011 | 4009 | struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg(); |
1da177e4 | 4010 | if (!smi_msg) |
c70d7499 CM |
4011 | /* |
4012 | * If we can't allocate the message, then just return, we | |
4013 | * get 4 retries, so this should be ok. | |
4014 | */ | |
882fe011 | 4015 | return NULL; |
1da177e4 LT |
4016 | |
4017 | memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len); | |
4018 | smi_msg->data_size = recv_msg->msg.data_len; | |
4019 | smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid); | |
c70d7499 | 4020 | |
1da177e4 LT |
4021 | #ifdef DEBUG_MSGING |
4022 | { | |
4023 | int m; | |
4024 | printk("Resend: "); | |
e8b33617 | 4025 | for (m = 0; m < smi_msg->data_size; m++) |
1da177e4 LT |
4026 | printk(" %2.2x", smi_msg->data[m]); |
4027 | printk("\n"); | |
4028 | } | |
4029 | #endif | |
882fe011 | 4030 | return smi_msg; |
1da177e4 LT |
4031 | } |
4032 | ||
393d2cc3 CM |
4033 | static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, |
4034 | struct list_head *timeouts, long timeout_period, | |
89986496 CM |
4035 | int slot, unsigned long *flags, |
4036 | unsigned int *waiting_msgs) | |
393d2cc3 | 4037 | { |
b2c03941 CM |
4038 | struct ipmi_recv_msg *msg; |
4039 | struct ipmi_smi_handlers *handlers; | |
4040 | ||
7ea0ed2b | 4041 | if (intf->in_shutdown) |
b2c03941 | 4042 | return; |
393d2cc3 CM |
4043 | |
4044 | if (!ent->inuse) | |
4045 | return; | |
4046 | ||
4047 | ent->timeout -= timeout_period; | |
89986496 CM |
4048 | if (ent->timeout > 0) { |
4049 | (*waiting_msgs)++; | |
393d2cc3 | 4050 | return; |
89986496 | 4051 | } |
393d2cc3 CM |
4052 | |
4053 | if (ent->retries_left == 0) { | |
4054 | /* The message has used all its retries. */ | |
4055 | ent->inuse = 0; | |
4056 | msg = ent->recv_msg; | |
4057 | list_add_tail(&msg->link, timeouts); | |
393d2cc3 | 4058 | if (ent->broadcast) |
b2655f26 | 4059 | ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); |
25176ed6 | 4060 | else if (is_lan_addr(&ent->recv_msg->addr)) |
b2655f26 | 4061 | ipmi_inc_stat(intf, timed_out_lan_commands); |
393d2cc3 | 4062 | else |
b2655f26 | 4063 | ipmi_inc_stat(intf, timed_out_ipmb_commands); |
393d2cc3 CM |
4064 | } else { |
4065 | struct ipmi_smi_msg *smi_msg; | |
4066 | /* More retries, send again. */ | |
4067 | ||
89986496 CM |
4068 | (*waiting_msgs)++; |
4069 | ||
c70d7499 CM |
4070 | /* |
4071 | * Start with the max timer, set to normal timer after | |
4072 | * the message is sent. | |
4073 | */ | |
393d2cc3 CM |
4074 | ent->timeout = MAX_MSG_TIMEOUT; |
4075 | ent->retries_left--; | |
393d2cc3 CM |
4076 | smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, |
4077 | ent->seqid); | |
25176ed6 CM |
4078 | if (!smi_msg) { |
4079 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4080 | ipmi_inc_stat(intf, | |
4081 | dropped_rexmit_lan_commands); | |
4082 | else | |
4083 | ipmi_inc_stat(intf, | |
4084 | dropped_rexmit_ipmb_commands); | |
393d2cc3 | 4085 | return; |
25176ed6 | 4086 | } |
393d2cc3 CM |
4087 | |
4088 | spin_unlock_irqrestore(&intf->seq_lock, *flags); | |
b2c03941 | 4089 | |
c70d7499 CM |
4090 | /* |
4091 | * Send the new message. We send with a zero | |
4092 | * priority. It timed out, I doubt time is that | |
4093 | * critical now, and high priority messages are really | |
4094 | * only for messages to the local MC, which don't get | |
4095 | * resent. | |
4096 | */ | |
b2c03941 | 4097 | handlers = intf->handlers; |
25176ed6 CM |
4098 | if (handlers) { |
4099 | if (is_lan_addr(&ent->recv_msg->addr)) | |
4100 | ipmi_inc_stat(intf, | |
4101 | retransmitted_lan_commands); | |
4102 | else | |
4103 | ipmi_inc_stat(intf, | |
4104 | retransmitted_ipmb_commands); | |
4105 | ||
7f4a1c84 | 4106 | smi_send(intf, intf->handlers, smi_msg, 0); |
25176ed6 | 4107 | } else |
b2c03941 CM |
4108 | ipmi_free_smi_msg(smi_msg); |
4109 | ||
393d2cc3 CM |
4110 | spin_lock_irqsave(&intf->seq_lock, *flags); |
4111 | } | |
4112 | } | |
4113 | ||
89986496 | 4114 | static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period) |
1da177e4 | 4115 | { |
1da177e4 LT |
4116 | struct list_head timeouts; |
4117 | struct ipmi_recv_msg *msg, *msg2; | |
1da177e4 | 4118 | unsigned long flags; |
bca0324d | 4119 | int i; |
89986496 | 4120 | unsigned int waiting_msgs = 0; |
1da177e4 | 4121 | |
89986496 CM |
4122 | /* |
4123 | * Go through the seq table and find any messages that | |
4124 | * have timed out, putting them in the timeouts | |
4125 | * list. | |
4126 | */ | |
4127 | INIT_LIST_HEAD(&timeouts); | |
4128 | spin_lock_irqsave(&intf->seq_lock, flags); | |
4129 | for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) | |
4130 | check_msg_timeout(intf, &(intf->seq_table[i]), | |
4131 | &timeouts, timeout_period, i, | |
4132 | &flags, &waiting_msgs); | |
4133 | spin_unlock_irqrestore(&intf->seq_lock, flags); | |
393d2cc3 | 4134 | |
89986496 CM |
4135 | list_for_each_entry_safe(msg, msg2, &timeouts, link) |
4136 | deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); | |
b9675136 | 4137 | |
89986496 CM |
4138 | /* |
4139 | * Maintenance mode handling. Check the timeout | |
4140 | * optimistically before we claim the lock. It may | |
4141 | * mean a timeout gets missed occasionally, but that | |
4142 | * only means the timeout gets extended by one period | |
4143 | * in that case. No big deal, and it avoids the lock | |
4144 | * most of the time. | |
4145 | */ | |
4146 | if (intf->auto_maintenance_timeout > 0) { | |
4147 | spin_lock_irqsave(&intf->maintenance_mode_lock, flags); | |
b9675136 | 4148 | if (intf->auto_maintenance_timeout > 0) { |
89986496 CM |
4149 | intf->auto_maintenance_timeout |
4150 | -= timeout_period; | |
4151 | if (!intf->maintenance_mode | |
4152 | && (intf->auto_maintenance_timeout <= 0)) { | |
7aefac26 | 4153 | intf->maintenance_mode_enable = false; |
89986496 | 4154 | maintenance_mode_update(intf); |
b9675136 | 4155 | } |
b9675136 | 4156 | } |
89986496 CM |
4157 | spin_unlock_irqrestore(&intf->maintenance_mode_lock, |
4158 | flags); | |
1da177e4 | 4159 | } |
89986496 CM |
4160 | |
4161 | tasklet_schedule(&intf->recv_tasklet); | |
4162 | ||
4163 | return waiting_msgs; | |
1da177e4 LT |
4164 | } |
4165 | ||
89986496 | 4166 | static void ipmi_request_event(ipmi_smi_t intf) |
1da177e4 | 4167 | { |
89986496 CM |
4168 | /* No event requests when in maintenance mode. */ |
4169 | if (intf->maintenance_mode_enable) | |
4170 | return; | |
b9675136 | 4171 | |
7ea0ed2b CM |
4172 | if (!intf->in_shutdown) |
4173 | intf->handlers->request_events(intf->send_info); | |
1da177e4 LT |
4174 | } |
4175 | ||
4176 | static struct timer_list ipmi_timer; | |
4177 | ||
8f43f84f | 4178 | static atomic_t stop_operation; |
1da177e4 LT |
4179 | |
4180 | static void ipmi_timeout(unsigned long data) | |
4181 | { | |
89986496 CM |
4182 | ipmi_smi_t intf; |
4183 | int nt = 0; | |
4184 | ||
8f43f84f | 4185 | if (atomic_read(&stop_operation)) |
1da177e4 | 4186 | return; |
1da177e4 | 4187 | |
89986496 CM |
4188 | rcu_read_lock(); |
4189 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
4190 | int lnt = 0; | |
4191 | ||
4192 | if (atomic_read(&intf->event_waiters)) { | |
4193 | intf->ticks_to_req_ev--; | |
4194 | if (intf->ticks_to_req_ev == 0) { | |
4195 | ipmi_request_event(intf); | |
4196 | intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; | |
4197 | } | |
4198 | lnt++; | |
4199 | } | |
4200 | ||
4201 | lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); | |
1da177e4 | 4202 | |
89986496 CM |
4203 | lnt = !!lnt; |
4204 | if (lnt != intf->last_needs_timer && | |
4205 | intf->handlers->set_need_watch) | |
4206 | intf->handlers->set_need_watch(intf->send_info, lnt); | |
4207 | intf->last_needs_timer = lnt; | |
1da177e4 | 4208 | |
89986496 CM |
4209 | nt += lnt; |
4210 | } | |
4211 | rcu_read_unlock(); | |
4212 | ||
4213 | if (nt) | |
4214 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
4215 | } |
4216 | ||
89986496 CM |
4217 | static void need_waiter(ipmi_smi_t intf) |
4218 | { | |
4219 | /* Racy, but worst case we start the timer twice. */ | |
4220 | if (!timer_pending(&ipmi_timer)) | |
4221 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
4222 | } | |
1da177e4 LT |
4223 | |
4224 | static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); | |
4225 | static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); | |
4226 | ||
4227 | /* FIXME - convert these to slabs. */ | |
4228 | static void free_smi_msg(struct ipmi_smi_msg *msg) | |
4229 | { | |
4230 | atomic_dec(&smi_msg_inuse_count); | |
4231 | kfree(msg); | |
4232 | } | |
4233 | ||
4234 | struct ipmi_smi_msg *ipmi_alloc_smi_msg(void) | |
4235 | { | |
4236 | struct ipmi_smi_msg *rv; | |
4237 | rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC); | |
4238 | if (rv) { | |
4239 | rv->done = free_smi_msg; | |
4240 | rv->user_data = NULL; | |
4241 | atomic_inc(&smi_msg_inuse_count); | |
4242 | } | |
4243 | return rv; | |
4244 | } | |
c70d7499 | 4245 | EXPORT_SYMBOL(ipmi_alloc_smi_msg); |
1da177e4 LT |
4246 | |
4247 | static void free_recv_msg(struct ipmi_recv_msg *msg) | |
4248 | { | |
4249 | atomic_dec(&recv_msg_inuse_count); | |
4250 | kfree(msg); | |
4251 | } | |
4252 | ||
74006309 | 4253 | static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void) |
1da177e4 LT |
4254 | { |
4255 | struct ipmi_recv_msg *rv; | |
4256 | ||
4257 | rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC); | |
4258 | if (rv) { | |
a9eec556 | 4259 | rv->user = NULL; |
1da177e4 LT |
4260 | rv->done = free_recv_msg; |
4261 | atomic_inc(&recv_msg_inuse_count); | |
4262 | } | |
4263 | return rv; | |
4264 | } | |
4265 | ||
393d2cc3 CM |
4266 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) |
4267 | { | |
4268 | if (msg->user) | |
4269 | kref_put(&msg->user->refcount, free_user); | |
4270 | msg->done(msg); | |
4271 | } | |
c70d7499 | 4272 | EXPORT_SYMBOL(ipmi_free_recv_msg); |
393d2cc3 | 4273 | |
1da177e4 LT |
4274 | #ifdef CONFIG_IPMI_PANIC_EVENT |
4275 | ||
895dcfd1 CM |
4276 | static atomic_t panic_done_count = ATOMIC_INIT(0); |
4277 | ||
1da177e4 LT |
4278 | static void dummy_smi_done_handler(struct ipmi_smi_msg *msg) |
4279 | { | |
895dcfd1 | 4280 | atomic_dec(&panic_done_count); |
1da177e4 LT |
4281 | } |
4282 | ||
4283 | static void dummy_recv_done_handler(struct ipmi_recv_msg *msg) | |
4284 | { | |
895dcfd1 CM |
4285 | atomic_dec(&panic_done_count); |
4286 | } | |
4287 | ||
4288 | /* | |
4289 | * Inside a panic, send a message and wait for a response. | |
4290 | */ | |
4291 | static void ipmi_panic_request_and_wait(ipmi_smi_t intf, | |
4292 | struct ipmi_addr *addr, | |
4293 | struct kernel_ipmi_msg *msg) | |
4294 | { | |
4295 | struct ipmi_smi_msg smi_msg; | |
4296 | struct ipmi_recv_msg recv_msg; | |
4297 | int rv; | |
4298 | ||
4299 | smi_msg.done = dummy_smi_done_handler; | |
4300 | recv_msg.done = dummy_recv_done_handler; | |
4301 | atomic_add(2, &panic_done_count); | |
4302 | rv = i_ipmi_request(NULL, | |
4303 | intf, | |
4304 | addr, | |
4305 | 0, | |
4306 | msg, | |
4307 | intf, | |
4308 | &smi_msg, | |
4309 | &recv_msg, | |
4310 | 0, | |
4311 | intf->channels[0].address, | |
4312 | intf->channels[0].lun, | |
4313 | 0, 1); /* Don't retry, and don't wait. */ | |
4314 | if (rv) | |
4315 | atomic_sub(2, &panic_done_count); | |
4316 | while (atomic_read(&panic_done_count) != 0) | |
4317 | ipmi_poll(intf); | |
1da177e4 LT |
4318 | } |
4319 | ||
4320 | #ifdef CONFIG_IPMI_PANIC_STRING | |
56a55ec6 | 4321 | static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4322 | { |
56a55ec6 CM |
4323 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4324 | && (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE) | |
4325 | && (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD) | |
c70d7499 | 4326 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
1da177e4 | 4327 | /* A get event receiver command, save it. */ |
56a55ec6 CM |
4328 | intf->event_receiver = msg->msg.data[1]; |
4329 | intf->event_receiver_lun = msg->msg.data[2] & 0x3; | |
1da177e4 LT |
4330 | } |
4331 | } | |
4332 | ||
56a55ec6 | 4333 | static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg) |
1da177e4 | 4334 | { |
56a55ec6 CM |
4335 | if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) |
4336 | && (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE) | |
4337 | && (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD) | |
c70d7499 CM |
4338 | && (msg->msg.data[0] == IPMI_CC_NO_ERROR)) { |
4339 | /* | |
4340 | * A get device id command, save if we are an event | |
4341 | * receiver or generator. | |
4342 | */ | |
56a55ec6 CM |
4343 | intf->local_sel_device = (msg->msg.data[6] >> 2) & 1; |
4344 | intf->local_event_generator = (msg->msg.data[6] >> 5) & 1; | |
1da177e4 LT |
4345 | } |
4346 | } | |
4347 | #endif | |
4348 | ||
4349 | static void send_panic_events(char *str) | |
4350 | { | |
4351 | struct kernel_ipmi_msg msg; | |
4352 | ipmi_smi_t intf; | |
4353 | unsigned char data[16]; | |
1da177e4 LT |
4354 | struct ipmi_system_interface_addr *si; |
4355 | struct ipmi_addr addr; | |
1da177e4 LT |
4356 | |
4357 | si = (struct ipmi_system_interface_addr *) &addr; | |
4358 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4359 | si->channel = IPMI_BMC_CHANNEL; | |
4360 | si->lun = 0; | |
4361 | ||
4362 | /* Fill in an event telling that we have failed. */ | |
4363 | msg.netfn = 0x04; /* Sensor or Event. */ | |
4364 | msg.cmd = 2; /* Platform event command. */ | |
4365 | msg.data = data; | |
4366 | msg.data_len = 8; | |
cda315ab | 4367 | data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */ |
1da177e4 LT |
4368 | data[1] = 0x03; /* This is for IPMI 1.0. */ |
4369 | data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */ | |
4370 | data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */ | |
4371 | data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */ | |
4372 | ||
c70d7499 CM |
4373 | /* |
4374 | * Put a few breadcrumbs in. Hopefully later we can add more things | |
4375 | * to make the panic events more useful. | |
4376 | */ | |
1da177e4 LT |
4377 | if (str) { |
4378 | data[3] = str[0]; | |
4379 | data[6] = str[1]; | |
4380 | data[7] = str[2]; | |
4381 | } | |
4382 | ||
1da177e4 | 4383 | /* For every registered interface, send the event. */ |
bca0324d | 4384 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4385 | if (!intf->handlers) |
4386 | /* Interface is not ready. */ | |
1da177e4 LT |
4387 | continue; |
4388 | ||
5956dce1 | 4389 | intf->run_to_completion = 1; |
1da177e4 LT |
4390 | /* Send the event announcing the panic. */ |
4391 | intf->handlers->set_run_to_completion(intf->send_info, 1); | |
895dcfd1 | 4392 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4393 | } |
4394 | ||
4395 | #ifdef CONFIG_IPMI_PANIC_STRING | |
c70d7499 CM |
4396 | /* |
4397 | * On every interface, dump a bunch of OEM event holding the | |
4398 | * string. | |
4399 | */ | |
4400 | if (!str) | |
1da177e4 LT |
4401 | return; |
4402 | ||
bca0324d CM |
4403 | /* For every registered interface, send the event. */ |
4404 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { | |
1da177e4 LT |
4405 | char *p = str; |
4406 | struct ipmi_ipmb_addr *ipmb; | |
4407 | int j; | |
4408 | ||
bca0324d CM |
4409 | if (intf->intf_num == -1) |
4410 | /* Interface was not ready yet. */ | |
1da177e4 LT |
4411 | continue; |
4412 | ||
78ba2faf CM |
4413 | /* |
4414 | * intf_num is used as an marker to tell if the | |
4415 | * interface is valid. Thus we need a read barrier to | |
4416 | * make sure data fetched before checking intf_num | |
4417 | * won't be used. | |
4418 | */ | |
4419 | smp_rmb(); | |
4420 | ||
c70d7499 CM |
4421 | /* |
4422 | * First job here is to figure out where to send the | |
4423 | * OEM events. There's no way in IPMI to send OEM | |
4424 | * events using an event send command, so we have to | |
4425 | * find the SEL to put them in and stick them in | |
4426 | * there. | |
4427 | */ | |
1da177e4 LT |
4428 | |
4429 | /* Get capabilities from the get device id. */ | |
4430 | intf->local_sel_device = 0; | |
4431 | intf->local_event_generator = 0; | |
4432 | intf->event_receiver = 0; | |
4433 | ||
4434 | /* Request the device info from the local MC. */ | |
4435 | msg.netfn = IPMI_NETFN_APP_REQUEST; | |
4436 | msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
4437 | msg.data = NULL; | |
4438 | msg.data_len = 0; | |
4439 | intf->null_user_handler = device_id_fetcher; | |
895dcfd1 | 4440 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4441 | |
4442 | if (intf->local_event_generator) { | |
4443 | /* Request the event receiver from the local MC. */ | |
4444 | msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST; | |
4445 | msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD; | |
4446 | msg.data = NULL; | |
4447 | msg.data_len = 0; | |
4448 | intf->null_user_handler = event_receiver_fetcher; | |
895dcfd1 | 4449 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 LT |
4450 | } |
4451 | intf->null_user_handler = NULL; | |
4452 | ||
c70d7499 CM |
4453 | /* |
4454 | * Validate the event receiver. The low bit must not | |
4455 | * be 1 (it must be a valid IPMB address), it cannot | |
4456 | * be zero, and it must not be my address. | |
4457 | */ | |
4458 | if (((intf->event_receiver & 1) == 0) | |
1da177e4 | 4459 | && (intf->event_receiver != 0) |
c70d7499 CM |
4460 | && (intf->event_receiver != intf->channels[0].address)) { |
4461 | /* | |
4462 | * The event receiver is valid, send an IPMB | |
4463 | * message. | |
4464 | */ | |
1da177e4 LT |
4465 | ipmb = (struct ipmi_ipmb_addr *) &addr; |
4466 | ipmb->addr_type = IPMI_IPMB_ADDR_TYPE; | |
4467 | ipmb->channel = 0; /* FIXME - is this right? */ | |
4468 | ipmb->lun = intf->event_receiver_lun; | |
4469 | ipmb->slave_addr = intf->event_receiver; | |
4470 | } else if (intf->local_sel_device) { | |
c70d7499 CM |
4471 | /* |
4472 | * The event receiver was not valid (or was | |
4473 | * me), but I am an SEL device, just dump it | |
4474 | * in my SEL. | |
4475 | */ | |
1da177e4 LT |
4476 | si = (struct ipmi_system_interface_addr *) &addr; |
4477 | si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
4478 | si->channel = IPMI_BMC_CHANNEL; | |
4479 | si->lun = 0; | |
4480 | } else | |
4481 | continue; /* No where to send the event. */ | |
4482 | ||
1da177e4 LT |
4483 | msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */ |
4484 | msg.cmd = IPMI_ADD_SEL_ENTRY_CMD; | |
4485 | msg.data = data; | |
4486 | msg.data_len = 16; | |
4487 | ||
4488 | j = 0; | |
4489 | while (*p) { | |
4490 | int size = strlen(p); | |
4491 | ||
4492 | if (size > 11) | |
4493 | size = 11; | |
4494 | data[0] = 0; | |
4495 | data[1] = 0; | |
4496 | data[2] = 0xf0; /* OEM event without timestamp. */ | |
c14979b9 | 4497 | data[3] = intf->channels[0].address; |
1da177e4 | 4498 | data[4] = j++; /* sequence # */ |
c70d7499 CM |
4499 | /* |
4500 | * Always give 11 bytes, so strncpy will fill | |
4501 | * it with zeroes for me. | |
4502 | */ | |
1da177e4 LT |
4503 | strncpy(data+5, p, 11); |
4504 | p += size; | |
4505 | ||
895dcfd1 | 4506 | ipmi_panic_request_and_wait(intf, &addr, &msg); |
1da177e4 | 4507 | } |
c70d7499 | 4508 | } |
1da177e4 LT |
4509 | #endif /* CONFIG_IPMI_PANIC_STRING */ |
4510 | } | |
4511 | #endif /* CONFIG_IPMI_PANIC_EVENT */ | |
4512 | ||
0c8204b3 | 4513 | static int has_panicked; |
1da177e4 LT |
4514 | |
4515 | static int panic_event(struct notifier_block *this, | |
4516 | unsigned long event, | |
c70d7499 | 4517 | void *ptr) |
1da177e4 | 4518 | { |
1da177e4 LT |
4519 | ipmi_smi_t intf; |
4520 | ||
f18190bd | 4521 | if (has_panicked) |
1da177e4 | 4522 | return NOTIFY_DONE; |
f18190bd | 4523 | has_panicked = 1; |
1da177e4 LT |
4524 | |
4525 | /* For every registered interface, set it to run to completion. */ | |
bca0324d | 4526 | list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { |
b2c03941 CM |
4527 | if (!intf->handlers) |
4528 | /* Interface is not ready. */ | |
1da177e4 LT |
4529 | continue; |
4530 | ||
5956dce1 | 4531 | intf->run_to_completion = 1; |
1da177e4 LT |
4532 | intf->handlers->set_run_to_completion(intf->send_info, 1); |
4533 | } | |
4534 | ||
4535 | #ifdef CONFIG_IPMI_PANIC_EVENT | |
4536 | send_panic_events(ptr); | |
4537 | #endif | |
4538 | ||
4539 | return NOTIFY_DONE; | |
4540 | } | |
4541 | ||
4542 | static struct notifier_block panic_block = { | |
4543 | .notifier_call = panic_event, | |
4544 | .next = NULL, | |
4545 | .priority = 200 /* priority: INT_MAX >= x >= 0 */ | |
4546 | }; | |
4547 | ||
4548 | static int ipmi_init_msghandler(void) | |
4549 | { | |
50c812b2 | 4550 | int rv; |
1da177e4 LT |
4551 | |
4552 | if (initialized) | |
4553 | return 0; | |
4554 | ||
fe2d5ffc | 4555 | rv = driver_register(&ipmidriver.driver); |
50c812b2 CM |
4556 | if (rv) { |
4557 | printk(KERN_ERR PFX "Could not register IPMI driver\n"); | |
4558 | return rv; | |
4559 | } | |
4560 | ||
1da177e4 | 4561 | printk(KERN_INFO "ipmi message handler version " |
1fdd75bd | 4562 | IPMI_DRIVER_VERSION "\n"); |
1da177e4 | 4563 | |
3b625943 | 4564 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
4565 | proc_ipmi_root = proc_mkdir("ipmi", NULL); |
4566 | if (!proc_ipmi_root) { | |
4567 | printk(KERN_ERR PFX "Unable to create IPMI proc dir"); | |
80fad5b9 | 4568 | driver_unregister(&ipmidriver.driver); |
1da177e4 LT |
4569 | return -ENOMEM; |
4570 | } | |
4571 | ||
3b625943 | 4572 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4573 | |
409035e0 CM |
4574 | setup_timer(&ipmi_timer, ipmi_timeout, 0); |
4575 | mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); | |
1da177e4 | 4576 | |
e041c683 | 4577 | atomic_notifier_chain_register(&panic_notifier_list, &panic_block); |
1da177e4 LT |
4578 | |
4579 | initialized = 1; | |
4580 | ||
4581 | return 0; | |
4582 | } | |
4583 | ||
60ee6d5f | 4584 | static int __init ipmi_init_msghandler_mod(void) |
1da177e4 LT |
4585 | { |
4586 | ipmi_init_msghandler(); | |
4587 | return 0; | |
4588 | } | |
4589 | ||
60ee6d5f | 4590 | static void __exit cleanup_ipmi(void) |
1da177e4 LT |
4591 | { |
4592 | int count; | |
4593 | ||
4594 | if (!initialized) | |
4595 | return; | |
4596 | ||
e041c683 | 4597 | atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); |
1da177e4 | 4598 | |
c70d7499 CM |
4599 | /* |
4600 | * This can't be called if any interfaces exist, so no worry | |
4601 | * about shutting down the interfaces. | |
4602 | */ | |
1da177e4 | 4603 | |
c70d7499 CM |
4604 | /* |
4605 | * Tell the timer to stop, then wait for it to stop. This | |
4606 | * avoids problems with race conditions removing the timer | |
4607 | * here. | |
4608 | */ | |
8f43f84f CM |
4609 | atomic_inc(&stop_operation); |
4610 | del_timer_sync(&ipmi_timer); | |
1da177e4 | 4611 | |
3b625943 | 4612 | #ifdef CONFIG_PROC_FS |
a8ca16ea | 4613 | proc_remove(proc_ipmi_root); |
3b625943 | 4614 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 4615 | |
fe2d5ffc | 4616 | driver_unregister(&ipmidriver.driver); |
50c812b2 | 4617 | |
1da177e4 LT |
4618 | initialized = 0; |
4619 | ||
4620 | /* Check for buffer leaks. */ | |
4621 | count = atomic_read(&smi_msg_inuse_count); | |
4622 | if (count != 0) | |
4623 | printk(KERN_WARNING PFX "SMI message count %d at exit\n", | |
4624 | count); | |
4625 | count = atomic_read(&recv_msg_inuse_count); | |
4626 | if (count != 0) | |
4627 | printk(KERN_WARNING PFX "recv message count %d at exit\n", | |
4628 | count); | |
4629 | } | |
4630 | module_exit(cleanup_ipmi); | |
4631 | ||
4632 | module_init(ipmi_init_msghandler_mod); | |
4633 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 4634 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c70d7499 CM |
4635 | MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI" |
4636 | " interface."); | |
1fdd75bd | 4637 | MODULE_VERSION(IPMI_DRIVER_VERSION); |