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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify it | |
14 | * under the terms of the GNU General Public License as published by the | |
15 | * Free Software Foundation; either version 2 of the License, or (at your | |
16 | * option) any later version. | |
17 | * | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
20 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
25 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
26 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
27 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
28 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License along | |
31 | * with this program; if not, write to the Free Software Foundation, Inc., | |
32 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
33 | */ | |
34 | ||
35 | /* | |
36 | * This file holds the "policy" for the interface to the SMI state | |
37 | * machine. It does the configuration, handles timers and interrupts, | |
38 | * and drives the real SMI state machine. | |
39 | */ | |
40 | ||
41 | #include <linux/config.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/moduleparam.h> | |
44 | #include <asm/system.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
54 | #include <asm/irq.h> | |
55 | #ifdef CONFIG_HIGH_RES_TIMERS | |
56 | #include <linux/hrtime.h> | |
57 | # if defined(schedule_next_int) | |
58 | /* Old high-res timer code, do translations. */ | |
59 | # define get_arch_cycles(a) quick_update_jiffies_sub(a) | |
60 | # define arch_cycles_per_jiffy cycles_per_jiffies | |
61 | # endif | |
62 | static inline void add_usec_to_timer(struct timer_list *t, long v) | |
63 | { | |
64 | t->sub_expires += nsec_to_arch_cycle(v * 1000); | |
65 | while (t->sub_expires >= arch_cycles_per_jiffy) | |
66 | { | |
67 | t->expires++; | |
68 | t->sub_expires -= arch_cycles_per_jiffy; | |
69 | } | |
70 | } | |
71 | #endif | |
72 | #include <linux/interrupt.h> | |
73 | #include <linux/rcupdate.h> | |
74 | #include <linux/ipmi_smi.h> | |
75 | #include <asm/io.h> | |
76 | #include "ipmi_si_sm.h" | |
77 | #include <linux/init.h> | |
78 | ||
79 | #define IPMI_SI_VERSION "v33" | |
80 | ||
81 | /* Measure times between events in the driver. */ | |
82 | #undef DEBUG_TIMING | |
83 | ||
84 | /* Call every 10 ms. */ | |
85 | #define SI_TIMEOUT_TIME_USEC 10000 | |
86 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
87 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
88 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
89 | short timeout */ | |
90 | ||
91 | enum si_intf_state { | |
92 | SI_NORMAL, | |
93 | SI_GETTING_FLAGS, | |
94 | SI_GETTING_EVENTS, | |
95 | SI_CLEARING_FLAGS, | |
96 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
97 | SI_GETTING_MESSAGES, | |
98 | SI_ENABLE_INTERRUPTS1, | |
99 | SI_ENABLE_INTERRUPTS2 | |
100 | /* FIXME - add watchdog stuff. */ | |
101 | }; | |
102 | ||
9dbf68f9 CM |
103 | /* Some BT-specific defines we need here. */ |
104 | #define IPMI_BT_INTMASK_REG 2 | |
105 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
106 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
107 | ||
1da177e4 LT |
108 | enum si_type { |
109 | SI_KCS, SI_SMIC, SI_BT | |
110 | }; | |
111 | ||
112 | struct smi_info | |
113 | { | |
114 | ipmi_smi_t intf; | |
115 | struct si_sm_data *si_sm; | |
116 | struct si_sm_handlers *handlers; | |
117 | enum si_type si_type; | |
118 | spinlock_t si_lock; | |
119 | spinlock_t msg_lock; | |
120 | struct list_head xmit_msgs; | |
121 | struct list_head hp_xmit_msgs; | |
122 | struct ipmi_smi_msg *curr_msg; | |
123 | enum si_intf_state si_state; | |
124 | ||
125 | /* Used to handle the various types of I/O that can occur with | |
126 | IPMI */ | |
127 | struct si_sm_io io; | |
128 | int (*io_setup)(struct smi_info *info); | |
129 | void (*io_cleanup)(struct smi_info *info); | |
130 | int (*irq_setup)(struct smi_info *info); | |
131 | void (*irq_cleanup)(struct smi_info *info); | |
132 | unsigned int io_size; | |
133 | ||
134 | /* Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
135 | is set to hold the flags until we are done handling everything | |
136 | from the flags. */ | |
137 | #define RECEIVE_MSG_AVAIL 0x01 | |
138 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
139 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
140 | unsigned char msg_flags; | |
141 | ||
142 | /* If set to true, this will request events the next time the | |
143 | state machine is idle. */ | |
144 | atomic_t req_events; | |
145 | ||
146 | /* If true, run the state machine to completion on every send | |
147 | call. Generally used after a panic to make sure stuff goes | |
148 | out. */ | |
149 | int run_to_completion; | |
150 | ||
151 | /* The I/O port of an SI interface. */ | |
152 | int port; | |
153 | ||
154 | /* The space between start addresses of the two ports. For | |
155 | instance, if the first port is 0xca2 and the spacing is 4, then | |
156 | the second port is 0xca6. */ | |
157 | unsigned int spacing; | |
158 | ||
159 | /* zero if no irq; */ | |
160 | int irq; | |
161 | ||
162 | /* The timer for this si. */ | |
163 | struct timer_list si_timer; | |
164 | ||
165 | /* The time (in jiffies) the last timeout occurred at. */ | |
166 | unsigned long last_timeout_jiffies; | |
167 | ||
168 | /* Used to gracefully stop the timer without race conditions. */ | |
169 | volatile int stop_operation; | |
170 | volatile int timer_stopped; | |
171 | ||
172 | /* The driver will disable interrupts when it gets into a | |
173 | situation where it cannot handle messages due to lack of | |
174 | memory. Once that situation clears up, it will re-enable | |
175 | interrupts. */ | |
176 | int interrupt_disabled; | |
177 | ||
178 | unsigned char ipmi_si_dev_rev; | |
179 | unsigned char ipmi_si_fw_rev_major; | |
180 | unsigned char ipmi_si_fw_rev_minor; | |
181 | unsigned char ipmi_version_major; | |
182 | unsigned char ipmi_version_minor; | |
183 | ||
184 | /* Slave address, could be reported from DMI. */ | |
185 | unsigned char slave_addr; | |
186 | ||
187 | /* Counters and things for the proc filesystem. */ | |
188 | spinlock_t count_lock; | |
189 | unsigned long short_timeouts; | |
190 | unsigned long long_timeouts; | |
191 | unsigned long timeout_restarts; | |
192 | unsigned long idles; | |
193 | unsigned long interrupts; | |
194 | unsigned long attentions; | |
195 | unsigned long flag_fetches; | |
196 | unsigned long hosed_count; | |
197 | unsigned long complete_transactions; | |
198 | unsigned long events; | |
199 | unsigned long watchdog_pretimeouts; | |
200 | unsigned long incoming_messages; | |
201 | }; | |
202 | ||
203 | static void si_restart_short_timer(struct smi_info *smi_info); | |
204 | ||
205 | static void deliver_recv_msg(struct smi_info *smi_info, | |
206 | struct ipmi_smi_msg *msg) | |
207 | { | |
208 | /* Deliver the message to the upper layer with the lock | |
209 | released. */ | |
210 | spin_unlock(&(smi_info->si_lock)); | |
211 | ipmi_smi_msg_received(smi_info->intf, msg); | |
212 | spin_lock(&(smi_info->si_lock)); | |
213 | } | |
214 | ||
215 | static void return_hosed_msg(struct smi_info *smi_info) | |
216 | { | |
217 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
218 | ||
219 | /* Make it a reponse */ | |
220 | msg->rsp[0] = msg->data[0] | 4; | |
221 | msg->rsp[1] = msg->data[1]; | |
222 | msg->rsp[2] = 0xFF; /* Unknown error. */ | |
223 | msg->rsp_size = 3; | |
224 | ||
225 | smi_info->curr_msg = NULL; | |
226 | deliver_recv_msg(smi_info, msg); | |
227 | } | |
228 | ||
229 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
230 | { | |
231 | int rv; | |
232 | struct list_head *entry = NULL; | |
233 | #ifdef DEBUG_TIMING | |
234 | struct timeval t; | |
235 | #endif | |
236 | ||
237 | /* No need to save flags, we aleady have interrupts off and we | |
238 | already hold the SMI lock. */ | |
239 | spin_lock(&(smi_info->msg_lock)); | |
240 | ||
241 | /* Pick the high priority queue first. */ | |
242 | if (! list_empty(&(smi_info->hp_xmit_msgs))) { | |
243 | entry = smi_info->hp_xmit_msgs.next; | |
244 | } else if (! list_empty(&(smi_info->xmit_msgs))) { | |
245 | entry = smi_info->xmit_msgs.next; | |
246 | } | |
247 | ||
248 | if (!entry) { | |
249 | smi_info->curr_msg = NULL; | |
250 | rv = SI_SM_IDLE; | |
251 | } else { | |
252 | int err; | |
253 | ||
254 | list_del(entry); | |
255 | smi_info->curr_msg = list_entry(entry, | |
256 | struct ipmi_smi_msg, | |
257 | link); | |
258 | #ifdef DEBUG_TIMING | |
259 | do_gettimeofday(&t); | |
260 | printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
261 | #endif | |
262 | err = smi_info->handlers->start_transaction( | |
263 | smi_info->si_sm, | |
264 | smi_info->curr_msg->data, | |
265 | smi_info->curr_msg->data_size); | |
266 | if (err) { | |
267 | return_hosed_msg(smi_info); | |
268 | } | |
269 | ||
270 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
271 | } | |
272 | spin_unlock(&(smi_info->msg_lock)); | |
273 | ||
274 | return rv; | |
275 | } | |
276 | ||
277 | static void start_enable_irq(struct smi_info *smi_info) | |
278 | { | |
279 | unsigned char msg[2]; | |
280 | ||
281 | /* If we are enabling interrupts, we have to tell the | |
282 | BMC to use them. */ | |
283 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
284 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
285 | ||
286 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
287 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
288 | } | |
289 | ||
290 | static void start_clear_flags(struct smi_info *smi_info) | |
291 | { | |
292 | unsigned char msg[3]; | |
293 | ||
294 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
295 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
296 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
297 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
298 | ||
299 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
300 | smi_info->si_state = SI_CLEARING_FLAGS; | |
301 | } | |
302 | ||
303 | /* When we have a situtaion where we run out of memory and cannot | |
304 | allocate messages, we just leave them in the BMC and run the system | |
305 | polled until we can allocate some memory. Once we have some | |
306 | memory, we will re-enable the interrupt. */ | |
307 | static inline void disable_si_irq(struct smi_info *smi_info) | |
308 | { | |
309 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { | |
310 | disable_irq_nosync(smi_info->irq); | |
311 | smi_info->interrupt_disabled = 1; | |
312 | } | |
313 | } | |
314 | ||
315 | static inline void enable_si_irq(struct smi_info *smi_info) | |
316 | { | |
317 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
318 | enable_irq(smi_info->irq); | |
319 | smi_info->interrupt_disabled = 0; | |
320 | } | |
321 | } | |
322 | ||
323 | static void handle_flags(struct smi_info *smi_info) | |
324 | { | |
325 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { | |
326 | /* Watchdog pre-timeout */ | |
327 | spin_lock(&smi_info->count_lock); | |
328 | smi_info->watchdog_pretimeouts++; | |
329 | spin_unlock(&smi_info->count_lock); | |
330 | ||
331 | start_clear_flags(smi_info); | |
332 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
333 | spin_unlock(&(smi_info->si_lock)); | |
334 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
335 | spin_lock(&(smi_info->si_lock)); | |
336 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
337 | /* Messages available. */ | |
338 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
339 | if (!smi_info->curr_msg) { | |
340 | disable_si_irq(smi_info); | |
341 | smi_info->si_state = SI_NORMAL; | |
342 | return; | |
343 | } | |
344 | enable_si_irq(smi_info); | |
345 | ||
346 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
347 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
348 | smi_info->curr_msg->data_size = 2; | |
349 | ||
350 | smi_info->handlers->start_transaction( | |
351 | smi_info->si_sm, | |
352 | smi_info->curr_msg->data, | |
353 | smi_info->curr_msg->data_size); | |
354 | smi_info->si_state = SI_GETTING_MESSAGES; | |
355 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
356 | /* Events available. */ | |
357 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
358 | if (!smi_info->curr_msg) { | |
359 | disable_si_irq(smi_info); | |
360 | smi_info->si_state = SI_NORMAL; | |
361 | return; | |
362 | } | |
363 | enable_si_irq(smi_info); | |
364 | ||
365 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
366 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
367 | smi_info->curr_msg->data_size = 2; | |
368 | ||
369 | smi_info->handlers->start_transaction( | |
370 | smi_info->si_sm, | |
371 | smi_info->curr_msg->data, | |
372 | smi_info->curr_msg->data_size); | |
373 | smi_info->si_state = SI_GETTING_EVENTS; | |
374 | } else { | |
375 | smi_info->si_state = SI_NORMAL; | |
376 | } | |
377 | } | |
378 | ||
379 | static void handle_transaction_done(struct smi_info *smi_info) | |
380 | { | |
381 | struct ipmi_smi_msg *msg; | |
382 | #ifdef DEBUG_TIMING | |
383 | struct timeval t; | |
384 | ||
385 | do_gettimeofday(&t); | |
386 | printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
387 | #endif | |
388 | switch (smi_info->si_state) { | |
389 | case SI_NORMAL: | |
390 | if (!smi_info->curr_msg) | |
391 | break; | |
392 | ||
393 | smi_info->curr_msg->rsp_size | |
394 | = smi_info->handlers->get_result( | |
395 | smi_info->si_sm, | |
396 | smi_info->curr_msg->rsp, | |
397 | IPMI_MAX_MSG_LENGTH); | |
398 | ||
399 | /* Do this here becase deliver_recv_msg() releases the | |
400 | lock, and a new message can be put in during the | |
401 | time the lock is released. */ | |
402 | msg = smi_info->curr_msg; | |
403 | smi_info->curr_msg = NULL; | |
404 | deliver_recv_msg(smi_info, msg); | |
405 | break; | |
406 | ||
407 | case SI_GETTING_FLAGS: | |
408 | { | |
409 | unsigned char msg[4]; | |
410 | unsigned int len; | |
411 | ||
412 | /* We got the flags from the SMI, now handle them. */ | |
413 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
414 | if (msg[2] != 0) { | |
415 | /* Error fetching flags, just give up for | |
416 | now. */ | |
417 | smi_info->si_state = SI_NORMAL; | |
418 | } else if (len < 4) { | |
419 | /* Hmm, no flags. That's technically illegal, but | |
420 | don't use uninitialized data. */ | |
421 | smi_info->si_state = SI_NORMAL; | |
422 | } else { | |
423 | smi_info->msg_flags = msg[3]; | |
424 | handle_flags(smi_info); | |
425 | } | |
426 | break; | |
427 | } | |
428 | ||
429 | case SI_CLEARING_FLAGS: | |
430 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
431 | { | |
432 | unsigned char msg[3]; | |
433 | ||
434 | /* We cleared the flags. */ | |
435 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
436 | if (msg[2] != 0) { | |
437 | /* Error clearing flags */ | |
438 | printk(KERN_WARNING | |
439 | "ipmi_si: Error clearing flags: %2.2x\n", | |
440 | msg[2]); | |
441 | } | |
442 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
443 | start_enable_irq(smi_info); | |
444 | else | |
445 | smi_info->si_state = SI_NORMAL; | |
446 | break; | |
447 | } | |
448 | ||
449 | case SI_GETTING_EVENTS: | |
450 | { | |
451 | smi_info->curr_msg->rsp_size | |
452 | = smi_info->handlers->get_result( | |
453 | smi_info->si_sm, | |
454 | smi_info->curr_msg->rsp, | |
455 | IPMI_MAX_MSG_LENGTH); | |
456 | ||
457 | /* Do this here becase deliver_recv_msg() releases the | |
458 | lock, and a new message can be put in during the | |
459 | time the lock is released. */ | |
460 | msg = smi_info->curr_msg; | |
461 | smi_info->curr_msg = NULL; | |
462 | if (msg->rsp[2] != 0) { | |
463 | /* Error getting event, probably done. */ | |
464 | msg->done(msg); | |
465 | ||
466 | /* Take off the event flag. */ | |
467 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
468 | handle_flags(smi_info); | |
469 | } else { | |
470 | spin_lock(&smi_info->count_lock); | |
471 | smi_info->events++; | |
472 | spin_unlock(&smi_info->count_lock); | |
473 | ||
474 | /* Do this before we deliver the message | |
475 | because delivering the message releases the | |
476 | lock and something else can mess with the | |
477 | state. */ | |
478 | handle_flags(smi_info); | |
479 | ||
480 | deliver_recv_msg(smi_info, msg); | |
481 | } | |
482 | break; | |
483 | } | |
484 | ||
485 | case SI_GETTING_MESSAGES: | |
486 | { | |
487 | smi_info->curr_msg->rsp_size | |
488 | = smi_info->handlers->get_result( | |
489 | smi_info->si_sm, | |
490 | smi_info->curr_msg->rsp, | |
491 | IPMI_MAX_MSG_LENGTH); | |
492 | ||
493 | /* Do this here becase deliver_recv_msg() releases the | |
494 | lock, and a new message can be put in during the | |
495 | time the lock is released. */ | |
496 | msg = smi_info->curr_msg; | |
497 | smi_info->curr_msg = NULL; | |
498 | if (msg->rsp[2] != 0) { | |
499 | /* Error getting event, probably done. */ | |
500 | msg->done(msg); | |
501 | ||
502 | /* Take off the msg flag. */ | |
503 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
504 | handle_flags(smi_info); | |
505 | } else { | |
506 | spin_lock(&smi_info->count_lock); | |
507 | smi_info->incoming_messages++; | |
508 | spin_unlock(&smi_info->count_lock); | |
509 | ||
510 | /* Do this before we deliver the message | |
511 | because delivering the message releases the | |
512 | lock and something else can mess with the | |
513 | state. */ | |
514 | handle_flags(smi_info); | |
515 | ||
516 | deliver_recv_msg(smi_info, msg); | |
517 | } | |
518 | break; | |
519 | } | |
520 | ||
521 | case SI_ENABLE_INTERRUPTS1: | |
522 | { | |
523 | unsigned char msg[4]; | |
524 | ||
525 | /* We got the flags from the SMI, now handle them. */ | |
526 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
527 | if (msg[2] != 0) { | |
528 | printk(KERN_WARNING | |
529 | "ipmi_si: Could not enable interrupts" | |
530 | ", failed get, using polled mode.\n"); | |
531 | smi_info->si_state = SI_NORMAL; | |
532 | } else { | |
533 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
534 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
535 | msg[2] = msg[3] | 1; /* enable msg queue int */ | |
536 | smi_info->handlers->start_transaction( | |
537 | smi_info->si_sm, msg, 3); | |
538 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
539 | } | |
540 | break; | |
541 | } | |
542 | ||
543 | case SI_ENABLE_INTERRUPTS2: | |
544 | { | |
545 | unsigned char msg[4]; | |
546 | ||
547 | /* We got the flags from the SMI, now handle them. */ | |
548 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
549 | if (msg[2] != 0) { | |
550 | printk(KERN_WARNING | |
551 | "ipmi_si: Could not enable interrupts" | |
552 | ", failed set, using polled mode.\n"); | |
553 | } | |
554 | smi_info->si_state = SI_NORMAL; | |
555 | break; | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | /* Called on timeouts and events. Timeouts should pass the elapsed | |
561 | time, interrupts should pass in zero. */ | |
562 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, | |
563 | int time) | |
564 | { | |
565 | enum si_sm_result si_sm_result; | |
566 | ||
567 | restart: | |
568 | /* There used to be a loop here that waited a little while | |
569 | (around 25us) before giving up. That turned out to be | |
570 | pointless, the minimum delays I was seeing were in the 300us | |
571 | range, which is far too long to wait in an interrupt. So | |
572 | we just run until the state machine tells us something | |
573 | happened or it needs a delay. */ | |
574 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); | |
575 | time = 0; | |
576 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
577 | { | |
578 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
579 | } | |
580 | ||
581 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) | |
582 | { | |
583 | spin_lock(&smi_info->count_lock); | |
584 | smi_info->complete_transactions++; | |
585 | spin_unlock(&smi_info->count_lock); | |
586 | ||
587 | handle_transaction_done(smi_info); | |
588 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
589 | } | |
590 | else if (si_sm_result == SI_SM_HOSED) | |
591 | { | |
592 | spin_lock(&smi_info->count_lock); | |
593 | smi_info->hosed_count++; | |
594 | spin_unlock(&smi_info->count_lock); | |
595 | ||
596 | /* Do the before return_hosed_msg, because that | |
597 | releases the lock. */ | |
598 | smi_info->si_state = SI_NORMAL; | |
599 | if (smi_info->curr_msg != NULL) { | |
600 | /* If we were handling a user message, format | |
601 | a response to send to the upper layer to | |
602 | tell it about the error. */ | |
603 | return_hosed_msg(smi_info); | |
604 | } | |
605 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
606 | } | |
607 | ||
608 | /* We prefer handling attn over new messages. */ | |
609 | if (si_sm_result == SI_SM_ATTN) | |
610 | { | |
611 | unsigned char msg[2]; | |
612 | ||
613 | spin_lock(&smi_info->count_lock); | |
614 | smi_info->attentions++; | |
615 | spin_unlock(&smi_info->count_lock); | |
616 | ||
617 | /* Got a attn, send down a get message flags to see | |
618 | what's causing it. It would be better to handle | |
619 | this in the upper layer, but due to the way | |
620 | interrupts work with the SMI, that's not really | |
621 | possible. */ | |
622 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
623 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
624 | ||
625 | smi_info->handlers->start_transaction( | |
626 | smi_info->si_sm, msg, 2); | |
627 | smi_info->si_state = SI_GETTING_FLAGS; | |
628 | goto restart; | |
629 | } | |
630 | ||
631 | /* If we are currently idle, try to start the next message. */ | |
632 | if (si_sm_result == SI_SM_IDLE) { | |
633 | spin_lock(&smi_info->count_lock); | |
634 | smi_info->idles++; | |
635 | spin_unlock(&smi_info->count_lock); | |
636 | ||
637 | si_sm_result = start_next_msg(smi_info); | |
638 | if (si_sm_result != SI_SM_IDLE) | |
639 | goto restart; | |
640 | } | |
641 | ||
642 | if ((si_sm_result == SI_SM_IDLE) | |
643 | && (atomic_read(&smi_info->req_events))) | |
644 | { | |
645 | /* We are idle and the upper layer requested that I fetch | |
646 | events, so do so. */ | |
647 | unsigned char msg[2]; | |
648 | ||
649 | spin_lock(&smi_info->count_lock); | |
650 | smi_info->flag_fetches++; | |
651 | spin_unlock(&smi_info->count_lock); | |
652 | ||
653 | atomic_set(&smi_info->req_events, 0); | |
654 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
655 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
656 | ||
657 | smi_info->handlers->start_transaction( | |
658 | smi_info->si_sm, msg, 2); | |
659 | smi_info->si_state = SI_GETTING_FLAGS; | |
660 | goto restart; | |
661 | } | |
662 | ||
663 | return si_sm_result; | |
664 | } | |
665 | ||
666 | static void sender(void *send_info, | |
667 | struct ipmi_smi_msg *msg, | |
668 | int priority) | |
669 | { | |
670 | struct smi_info *smi_info = send_info; | |
671 | enum si_sm_result result; | |
672 | unsigned long flags; | |
673 | #ifdef DEBUG_TIMING | |
674 | struct timeval t; | |
675 | #endif | |
676 | ||
677 | spin_lock_irqsave(&(smi_info->msg_lock), flags); | |
678 | #ifdef DEBUG_TIMING | |
679 | do_gettimeofday(&t); | |
680 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
681 | #endif | |
682 | ||
683 | if (smi_info->run_to_completion) { | |
684 | /* If we are running to completion, then throw it in | |
685 | the list and run transactions until everything is | |
686 | clear. Priority doesn't matter here. */ | |
687 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
688 | ||
689 | /* We have to release the msg lock and claim the smi | |
690 | lock in this case, because of race conditions. */ | |
691 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
692 | ||
693 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
694 | result = smi_event_handler(smi_info, 0); | |
695 | while (result != SI_SM_IDLE) { | |
696 | udelay(SI_SHORT_TIMEOUT_USEC); | |
697 | result = smi_event_handler(smi_info, | |
698 | SI_SHORT_TIMEOUT_USEC); | |
699 | } | |
700 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
701 | return; | |
702 | } else { | |
703 | if (priority > 0) { | |
704 | list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs)); | |
705 | } else { | |
706 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
707 | } | |
708 | } | |
709 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
710 | ||
711 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
712 | if ((smi_info->si_state == SI_NORMAL) | |
713 | && (smi_info->curr_msg == NULL)) | |
714 | { | |
715 | start_next_msg(smi_info); | |
716 | si_restart_short_timer(smi_info); | |
717 | } | |
718 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
719 | } | |
720 | ||
721 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
722 | { | |
723 | struct smi_info *smi_info = send_info; | |
724 | enum si_sm_result result; | |
725 | unsigned long flags; | |
726 | ||
727 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
728 | ||
729 | smi_info->run_to_completion = i_run_to_completion; | |
730 | if (i_run_to_completion) { | |
731 | result = smi_event_handler(smi_info, 0); | |
732 | while (result != SI_SM_IDLE) { | |
733 | udelay(SI_SHORT_TIMEOUT_USEC); | |
734 | result = smi_event_handler(smi_info, | |
735 | SI_SHORT_TIMEOUT_USEC); | |
736 | } | |
737 | } | |
738 | ||
739 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
740 | } | |
741 | ||
742 | static void poll(void *send_info) | |
743 | { | |
744 | struct smi_info *smi_info = send_info; | |
745 | ||
746 | smi_event_handler(smi_info, 0); | |
747 | } | |
748 | ||
749 | static void request_events(void *send_info) | |
750 | { | |
751 | struct smi_info *smi_info = send_info; | |
752 | ||
753 | atomic_set(&smi_info->req_events, 1); | |
754 | } | |
755 | ||
756 | static int initialized = 0; | |
757 | ||
758 | /* Must be called with interrupts off and with the si_lock held. */ | |
759 | static void si_restart_short_timer(struct smi_info *smi_info) | |
760 | { | |
761 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
762 | unsigned long flags; | |
763 | unsigned long jiffies_now; | |
764 | ||
765 | if (del_timer(&(smi_info->si_timer))) { | |
766 | /* If we don't delete the timer, then it will go off | |
767 | immediately, anyway. So we only process if we | |
768 | actually delete the timer. */ | |
769 | ||
770 | /* We already have irqsave on, so no need for it | |
771 | here. */ | |
772 | read_lock(&xtime_lock); | |
773 | jiffies_now = jiffies; | |
774 | smi_info->si_timer.expires = jiffies_now; | |
775 | smi_info->si_timer.sub_expires = get_arch_cycles(jiffies_now); | |
776 | ||
777 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); | |
778 | ||
779 | add_timer(&(smi_info->si_timer)); | |
780 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
781 | smi_info->timeout_restarts++; | |
782 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
783 | } | |
784 | #endif | |
785 | } | |
786 | ||
787 | static void smi_timeout(unsigned long data) | |
788 | { | |
789 | struct smi_info *smi_info = (struct smi_info *) data; | |
790 | enum si_sm_result smi_result; | |
791 | unsigned long flags; | |
792 | unsigned long jiffies_now; | |
793 | unsigned long time_diff; | |
794 | #ifdef DEBUG_TIMING | |
795 | struct timeval t; | |
796 | #endif | |
797 | ||
798 | if (smi_info->stop_operation) { | |
799 | smi_info->timer_stopped = 1; | |
800 | return; | |
801 | } | |
802 | ||
803 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
804 | #ifdef DEBUG_TIMING | |
805 | do_gettimeofday(&t); | |
806 | printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
807 | #endif | |
808 | jiffies_now = jiffies; | |
809 | time_diff = ((jiffies_now - smi_info->last_timeout_jiffies) | |
810 | * SI_USEC_PER_JIFFY); | |
811 | smi_result = smi_event_handler(smi_info, time_diff); | |
812 | ||
813 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
814 | ||
815 | smi_info->last_timeout_jiffies = jiffies_now; | |
816 | ||
817 | if ((smi_info->irq) && (! smi_info->interrupt_disabled)) { | |
818 | /* Running with interrupts, only do long timeouts. */ | |
819 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
820 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
821 | smi_info->long_timeouts++; | |
822 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
823 | goto do_add_timer; | |
824 | } | |
825 | ||
826 | /* If the state machine asks for a short delay, then shorten | |
827 | the timer timeout. */ | |
828 | if (smi_result == SI_SM_CALL_WITH_DELAY) { | |
829 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
830 | smi_info->short_timeouts++; | |
831 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
832 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
833 | read_lock(&xtime_lock); | |
834 | smi_info->si_timer.expires = jiffies; | |
835 | smi_info->si_timer.sub_expires | |
836 | = get_arch_cycles(smi_info->si_timer.expires); | |
837 | read_unlock(&xtime_lock); | |
838 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); | |
839 | #else | |
840 | smi_info->si_timer.expires = jiffies + 1; | |
841 | #endif | |
842 | } else { | |
843 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
844 | smi_info->long_timeouts++; | |
845 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
846 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
847 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
848 | smi_info->si_timer.sub_expires = 0; | |
849 | #endif | |
850 | } | |
851 | ||
852 | do_add_timer: | |
853 | add_timer(&(smi_info->si_timer)); | |
854 | } | |
855 | ||
856 | static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs) | |
857 | { | |
858 | struct smi_info *smi_info = data; | |
859 | unsigned long flags; | |
860 | #ifdef DEBUG_TIMING | |
861 | struct timeval t; | |
862 | #endif | |
863 | ||
864 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
865 | ||
866 | spin_lock(&smi_info->count_lock); | |
867 | smi_info->interrupts++; | |
868 | spin_unlock(&smi_info->count_lock); | |
869 | ||
870 | if (smi_info->stop_operation) | |
871 | goto out; | |
872 | ||
873 | #ifdef DEBUG_TIMING | |
874 | do_gettimeofday(&t); | |
875 | printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
876 | #endif | |
877 | smi_event_handler(smi_info, 0); | |
878 | out: | |
879 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
880 | return IRQ_HANDLED; | |
881 | } | |
882 | ||
9dbf68f9 CM |
883 | static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs) |
884 | { | |
885 | struct smi_info *smi_info = data; | |
886 | /* We need to clear the IRQ flag for the BT interface. */ | |
887 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
888 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
889 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
890 | return si_irq_handler(irq, data, regs); | |
891 | } | |
892 | ||
893 | ||
1da177e4 LT |
894 | static struct ipmi_smi_handlers handlers = |
895 | { | |
896 | .owner = THIS_MODULE, | |
897 | .sender = sender, | |
898 | .request_events = request_events, | |
899 | .set_run_to_completion = set_run_to_completion, | |
900 | .poll = poll, | |
901 | }; | |
902 | ||
903 | /* There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
904 | a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */ | |
905 | ||
906 | #define SI_MAX_PARMS 4 | |
907 | #define SI_MAX_DRIVERS ((SI_MAX_PARMS * 2) + 2) | |
908 | static struct smi_info *smi_infos[SI_MAX_DRIVERS] = | |
909 | { NULL, NULL, NULL, NULL }; | |
910 | ||
911 | #define DEVICE_NAME "ipmi_si" | |
912 | ||
913 | #define DEFAULT_KCS_IO_PORT 0xca2 | |
914 | #define DEFAULT_SMIC_IO_PORT 0xca9 | |
915 | #define DEFAULT_BT_IO_PORT 0xe4 | |
916 | #define DEFAULT_REGSPACING 1 | |
917 | ||
918 | static int si_trydefaults = 1; | |
919 | static char *si_type[SI_MAX_PARMS]; | |
920 | #define MAX_SI_TYPE_STR 30 | |
921 | static char si_type_str[MAX_SI_TYPE_STR]; | |
922 | static unsigned long addrs[SI_MAX_PARMS]; | |
923 | static int num_addrs; | |
924 | static unsigned int ports[SI_MAX_PARMS]; | |
925 | static int num_ports; | |
926 | static int irqs[SI_MAX_PARMS]; | |
927 | static int num_irqs; | |
928 | static int regspacings[SI_MAX_PARMS]; | |
929 | static int num_regspacings = 0; | |
930 | static int regsizes[SI_MAX_PARMS]; | |
931 | static int num_regsizes = 0; | |
932 | static int regshifts[SI_MAX_PARMS]; | |
933 | static int num_regshifts = 0; | |
934 | static int slave_addrs[SI_MAX_PARMS]; | |
935 | static int num_slave_addrs = 0; | |
936 | ||
937 | ||
938 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
939 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
940 | " default scan of the KCS and SMIC interface at the standard" | |
941 | " address"); | |
942 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
943 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
944 | " interface separated by commas. The types are 'kcs'," | |
945 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
946 | " the first interface to kcs and the second to bt"); | |
947 | module_param_array(addrs, long, &num_addrs, 0); | |
948 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" | |
949 | " addresses separated by commas. Only use if an interface" | |
950 | " is in memory. Otherwise, set it to zero or leave" | |
951 | " it blank."); | |
952 | module_param_array(ports, int, &num_ports, 0); | |
953 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" | |
954 | " addresses separated by commas. Only use if an interface" | |
955 | " is a port. Otherwise, set it to zero or leave" | |
956 | " it blank."); | |
957 | module_param_array(irqs, int, &num_irqs, 0); | |
958 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
959 | " addresses separated by commas. Only use if an interface" | |
960 | " has an interrupt. Otherwise, set it to zero or leave" | |
961 | " it blank."); | |
962 | module_param_array(regspacings, int, &num_regspacings, 0); | |
963 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
964 | " and each successive register used by the interface. For" | |
965 | " instance, if the start address is 0xca2 and the spacing" | |
966 | " is 2, then the second address is at 0xca4. Defaults" | |
967 | " to 1."); | |
968 | module_param_array(regsizes, int, &num_regsizes, 0); | |
969 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
970 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
971 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
972 | " the 8-bit IPMI register has to be read from a larger" | |
973 | " register."); | |
974 | module_param_array(regshifts, int, &num_regshifts, 0); | |
975 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
976 | " IPMI register, in bits. For instance, if the data" | |
977 | " is read from a 32-bit word and the IPMI data is in" | |
978 | " bit 8-15, then the shift would be 8"); | |
979 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
980 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
981 | " the controller. Normally this is 0x20, but can be" | |
982 | " overridden by this parm. This is an array indexed" | |
983 | " by interface number."); | |
984 | ||
985 | ||
986 | #define IPMI_MEM_ADDR_SPACE 1 | |
987 | #define IPMI_IO_ADDR_SPACE 2 | |
988 | ||
989 | #if defined(CONFIG_ACPI_INTERPRETER) || defined(CONFIG_X86) || defined(CONFIG_PCI) | |
990 | static int is_new_interface(int intf, u8 addr_space, unsigned long base_addr) | |
991 | { | |
992 | int i; | |
993 | ||
994 | for (i = 0; i < SI_MAX_PARMS; ++i) { | |
995 | /* Don't check our address. */ | |
996 | if (i == intf) | |
997 | continue; | |
998 | if (si_type[i] != NULL) { | |
999 | if ((addr_space == IPMI_MEM_ADDR_SPACE && | |
1000 | base_addr == addrs[i]) || | |
1001 | (addr_space == IPMI_IO_ADDR_SPACE && | |
1002 | base_addr == ports[i])) | |
1003 | return 0; | |
1004 | } | |
1005 | else | |
1006 | break; | |
1007 | } | |
1008 | ||
1009 | return 1; | |
1010 | } | |
1011 | #endif | |
1012 | ||
1013 | static int std_irq_setup(struct smi_info *info) | |
1014 | { | |
1015 | int rv; | |
1016 | ||
1017 | if (!info->irq) | |
1018 | return 0; | |
1019 | ||
9dbf68f9 CM |
1020 | if (info->si_type == SI_BT) { |
1021 | rv = request_irq(info->irq, | |
1022 | si_bt_irq_handler, | |
1023 | SA_INTERRUPT, | |
1024 | DEVICE_NAME, | |
1025 | info); | |
1026 | if (!rv) | |
1027 | /* Enable the interrupt in the BT interface. */ | |
1028 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1029 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1030 | } else | |
1031 | rv = request_irq(info->irq, | |
1032 | si_irq_handler, | |
1033 | SA_INTERRUPT, | |
1034 | DEVICE_NAME, | |
1035 | info); | |
1da177e4 LT |
1036 | if (rv) { |
1037 | printk(KERN_WARNING | |
1038 | "ipmi_si: %s unable to claim interrupt %d," | |
1039 | " running polled\n", | |
1040 | DEVICE_NAME, info->irq); | |
1041 | info->irq = 0; | |
1042 | } else { | |
1043 | printk(" Using irq %d\n", info->irq); | |
1044 | } | |
1045 | ||
1046 | return rv; | |
1047 | } | |
1048 | ||
1049 | static void std_irq_cleanup(struct smi_info *info) | |
1050 | { | |
1051 | if (!info->irq) | |
1052 | return; | |
1053 | ||
9dbf68f9 CM |
1054 | if (info->si_type == SI_BT) |
1055 | /* Disable the interrupt in the BT interface. */ | |
1056 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1da177e4 LT |
1057 | free_irq(info->irq, info); |
1058 | } | |
1059 | ||
1060 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) | |
1061 | { | |
1062 | unsigned int *addr = io->info; | |
1063 | ||
1064 | return inb((*addr)+(offset*io->regspacing)); | |
1065 | } | |
1066 | ||
1067 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1068 | unsigned char b) | |
1069 | { | |
1070 | unsigned int *addr = io->info; | |
1071 | ||
1072 | outb(b, (*addr)+(offset * io->regspacing)); | |
1073 | } | |
1074 | ||
1075 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1076 | { | |
1077 | unsigned int *addr = io->info; | |
1078 | ||
1079 | return (inw((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff; | |
1080 | } | |
1081 | ||
1082 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1083 | unsigned char b) | |
1084 | { | |
1085 | unsigned int *addr = io->info; | |
1086 | ||
1087 | outw(b << io->regshift, (*addr)+(offset * io->regspacing)); | |
1088 | } | |
1089 | ||
1090 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1091 | { | |
1092 | unsigned int *addr = io->info; | |
1093 | ||
1094 | return (inl((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff; | |
1095 | } | |
1096 | ||
1097 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1098 | unsigned char b) | |
1099 | { | |
1100 | unsigned int *addr = io->info; | |
1101 | ||
1102 | outl(b << io->regshift, (*addr)+(offset * io->regspacing)); | |
1103 | } | |
1104 | ||
1105 | static void port_cleanup(struct smi_info *info) | |
1106 | { | |
1107 | unsigned int *addr = info->io.info; | |
1108 | int mapsize; | |
1109 | ||
1110 | if (addr && (*addr)) { | |
1111 | mapsize = ((info->io_size * info->io.regspacing) | |
1112 | - (info->io.regspacing - info->io.regsize)); | |
1113 | ||
1114 | release_region (*addr, mapsize); | |
1115 | } | |
1116 | kfree(info); | |
1117 | } | |
1118 | ||
1119 | static int port_setup(struct smi_info *info) | |
1120 | { | |
1121 | unsigned int *addr = info->io.info; | |
1122 | int mapsize; | |
1123 | ||
1124 | if (!addr || (!*addr)) | |
1125 | return -ENODEV; | |
1126 | ||
1127 | info->io_cleanup = port_cleanup; | |
1128 | ||
1129 | /* Figure out the actual inb/inw/inl/etc routine to use based | |
1130 | upon the register size. */ | |
1131 | switch (info->io.regsize) { | |
1132 | case 1: | |
1133 | info->io.inputb = port_inb; | |
1134 | info->io.outputb = port_outb; | |
1135 | break; | |
1136 | case 2: | |
1137 | info->io.inputb = port_inw; | |
1138 | info->io.outputb = port_outw; | |
1139 | break; | |
1140 | case 4: | |
1141 | info->io.inputb = port_inl; | |
1142 | info->io.outputb = port_outl; | |
1143 | break; | |
1144 | default: | |
1145 | printk("ipmi_si: Invalid register size: %d\n", | |
1146 | info->io.regsize); | |
1147 | return -EINVAL; | |
1148 | } | |
1149 | ||
1150 | /* Calculate the total amount of memory to claim. This is an | |
1151 | * unusual looking calculation, but it avoids claiming any | |
1152 | * more memory than it has to. It will claim everything | |
1153 | * between the first address to the end of the last full | |
1154 | * register. */ | |
1155 | mapsize = ((info->io_size * info->io.regspacing) | |
1156 | - (info->io.regspacing - info->io.regsize)); | |
1157 | ||
1158 | if (request_region(*addr, mapsize, DEVICE_NAME) == NULL) | |
1159 | return -EIO; | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static int try_init_port(int intf_num, struct smi_info **new_info) | |
1164 | { | |
1165 | struct smi_info *info; | |
1166 | ||
1167 | if (!ports[intf_num]) | |
1168 | return -ENODEV; | |
1169 | ||
1170 | if (!is_new_interface(intf_num, IPMI_IO_ADDR_SPACE, | |
1171 | ports[intf_num])) | |
1172 | return -ENODEV; | |
1173 | ||
1174 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1175 | if (!info) { | |
1176 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (1)\n"); | |
1177 | return -ENOMEM; | |
1178 | } | |
1179 | memset(info, 0, sizeof(*info)); | |
1180 | ||
1181 | info->io_setup = port_setup; | |
1182 | info->io.info = &(ports[intf_num]); | |
1183 | info->io.addr = NULL; | |
1184 | info->io.regspacing = regspacings[intf_num]; | |
1185 | if (!info->io.regspacing) | |
1186 | info->io.regspacing = DEFAULT_REGSPACING; | |
1187 | info->io.regsize = regsizes[intf_num]; | |
1188 | if (!info->io.regsize) | |
1189 | info->io.regsize = DEFAULT_REGSPACING; | |
1190 | info->io.regshift = regshifts[intf_num]; | |
1191 | info->irq = 0; | |
1192 | info->irq_setup = NULL; | |
1193 | *new_info = info; | |
1194 | ||
1195 | if (si_type[intf_num] == NULL) | |
1196 | si_type[intf_num] = "kcs"; | |
1197 | ||
1198 | printk("ipmi_si: Trying \"%s\" at I/O port 0x%x\n", | |
1199 | si_type[intf_num], ports[intf_num]); | |
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static unsigned char mem_inb(struct si_sm_io *io, unsigned int offset) | |
1204 | { | |
1205 | return readb((io->addr)+(offset * io->regspacing)); | |
1206 | } | |
1207 | ||
1208 | static void mem_outb(struct si_sm_io *io, unsigned int offset, | |
1209 | unsigned char b) | |
1210 | { | |
1211 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1212 | } | |
1213 | ||
1214 | static unsigned char mem_inw(struct si_sm_io *io, unsigned int offset) | |
1215 | { | |
1216 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1217 | && 0xff; | |
1218 | } | |
1219 | ||
1220 | static void mem_outw(struct si_sm_io *io, unsigned int offset, | |
1221 | unsigned char b) | |
1222 | { | |
1223 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1224 | } | |
1225 | ||
1226 | static unsigned char mem_inl(struct si_sm_io *io, unsigned int offset) | |
1227 | { | |
1228 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1229 | && 0xff; | |
1230 | } | |
1231 | ||
1232 | static void mem_outl(struct si_sm_io *io, unsigned int offset, | |
1233 | unsigned char b) | |
1234 | { | |
1235 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1236 | } | |
1237 | ||
1238 | #ifdef readq | |
1239 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1240 | { | |
1241 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1242 | && 0xff; | |
1243 | } | |
1244 | ||
1245 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1246 | unsigned char b) | |
1247 | { | |
1248 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1249 | } | |
1250 | #endif | |
1251 | ||
1252 | static void mem_cleanup(struct smi_info *info) | |
1253 | { | |
1254 | unsigned long *addr = info->io.info; | |
1255 | int mapsize; | |
1256 | ||
1257 | if (info->io.addr) { | |
1258 | iounmap(info->io.addr); | |
1259 | ||
1260 | mapsize = ((info->io_size * info->io.regspacing) | |
1261 | - (info->io.regspacing - info->io.regsize)); | |
1262 | ||
1263 | release_mem_region(*addr, mapsize); | |
1264 | } | |
1265 | kfree(info); | |
1266 | } | |
1267 | ||
1268 | static int mem_setup(struct smi_info *info) | |
1269 | { | |
1270 | unsigned long *addr = info->io.info; | |
1271 | int mapsize; | |
1272 | ||
1273 | if (!addr || (!*addr)) | |
1274 | return -ENODEV; | |
1275 | ||
1276 | info->io_cleanup = mem_cleanup; | |
1277 | ||
1278 | /* Figure out the actual readb/readw/readl/etc routine to use based | |
1279 | upon the register size. */ | |
1280 | switch (info->io.regsize) { | |
1281 | case 1: | |
1282 | info->io.inputb = mem_inb; | |
1283 | info->io.outputb = mem_outb; | |
1284 | break; | |
1285 | case 2: | |
1286 | info->io.inputb = mem_inw; | |
1287 | info->io.outputb = mem_outw; | |
1288 | break; | |
1289 | case 4: | |
1290 | info->io.inputb = mem_inl; | |
1291 | info->io.outputb = mem_outl; | |
1292 | break; | |
1293 | #ifdef readq | |
1294 | case 8: | |
1295 | info->io.inputb = mem_inq; | |
1296 | info->io.outputb = mem_outq; | |
1297 | break; | |
1298 | #endif | |
1299 | default: | |
1300 | printk("ipmi_si: Invalid register size: %d\n", | |
1301 | info->io.regsize); | |
1302 | return -EINVAL; | |
1303 | } | |
1304 | ||
1305 | /* Calculate the total amount of memory to claim. This is an | |
1306 | * unusual looking calculation, but it avoids claiming any | |
1307 | * more memory than it has to. It will claim everything | |
1308 | * between the first address to the end of the last full | |
1309 | * register. */ | |
1310 | mapsize = ((info->io_size * info->io.regspacing) | |
1311 | - (info->io.regspacing - info->io.regsize)); | |
1312 | ||
1313 | if (request_mem_region(*addr, mapsize, DEVICE_NAME) == NULL) | |
1314 | return -EIO; | |
1315 | ||
1316 | info->io.addr = ioremap(*addr, mapsize); | |
1317 | if (info->io.addr == NULL) { | |
1318 | release_mem_region(*addr, mapsize); | |
1319 | return -EIO; | |
1320 | } | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static int try_init_mem(int intf_num, struct smi_info **new_info) | |
1325 | { | |
1326 | struct smi_info *info; | |
1327 | ||
1328 | if (!addrs[intf_num]) | |
1329 | return -ENODEV; | |
1330 | ||
1331 | if (!is_new_interface(intf_num, IPMI_MEM_ADDR_SPACE, | |
1332 | addrs[intf_num])) | |
1333 | return -ENODEV; | |
1334 | ||
1335 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1336 | if (!info) { | |
1337 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (2)\n"); | |
1338 | return -ENOMEM; | |
1339 | } | |
1340 | memset(info, 0, sizeof(*info)); | |
1341 | ||
1342 | info->io_setup = mem_setup; | |
1343 | info->io.info = &addrs[intf_num]; | |
1344 | info->io.addr = NULL; | |
1345 | info->io.regspacing = regspacings[intf_num]; | |
1346 | if (!info->io.regspacing) | |
1347 | info->io.regspacing = DEFAULT_REGSPACING; | |
1348 | info->io.regsize = regsizes[intf_num]; | |
1349 | if (!info->io.regsize) | |
1350 | info->io.regsize = DEFAULT_REGSPACING; | |
1351 | info->io.regshift = regshifts[intf_num]; | |
1352 | info->irq = 0; | |
1353 | info->irq_setup = NULL; | |
1354 | *new_info = info; | |
1355 | ||
1356 | if (si_type[intf_num] == NULL) | |
1357 | si_type[intf_num] = "kcs"; | |
1358 | ||
1359 | printk("ipmi_si: Trying \"%s\" at memory address 0x%lx\n", | |
1360 | si_type[intf_num], addrs[intf_num]); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | ||
1365 | #ifdef CONFIG_ACPI_INTERPRETER | |
1366 | ||
1367 | #include <linux/acpi.h> | |
1368 | ||
1369 | /* Once we get an ACPI failure, we don't try any more, because we go | |
1370 | through the tables sequentially. Once we don't find a table, there | |
1371 | are no more. */ | |
1372 | static int acpi_failure = 0; | |
1373 | ||
1374 | /* For GPE-type interrupts. */ | |
1375 | static u32 ipmi_acpi_gpe(void *context) | |
1376 | { | |
1377 | struct smi_info *smi_info = context; | |
1378 | unsigned long flags; | |
1379 | #ifdef DEBUG_TIMING | |
1380 | struct timeval t; | |
1381 | #endif | |
1382 | ||
1383 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1384 | ||
1385 | spin_lock(&smi_info->count_lock); | |
1386 | smi_info->interrupts++; | |
1387 | spin_unlock(&smi_info->count_lock); | |
1388 | ||
1389 | if (smi_info->stop_operation) | |
1390 | goto out; | |
1391 | ||
1392 | #ifdef DEBUG_TIMING | |
1393 | do_gettimeofday(&t); | |
1394 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1395 | #endif | |
1396 | smi_event_handler(smi_info, 0); | |
1397 | out: | |
1398 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1399 | ||
1400 | return ACPI_INTERRUPT_HANDLED; | |
1401 | } | |
1402 | ||
1403 | static int acpi_gpe_irq_setup(struct smi_info *info) | |
1404 | { | |
1405 | acpi_status status; | |
1406 | ||
1407 | if (!info->irq) | |
1408 | return 0; | |
1409 | ||
1410 | /* FIXME - is level triggered right? */ | |
1411 | status = acpi_install_gpe_handler(NULL, | |
1412 | info->irq, | |
1413 | ACPI_GPE_LEVEL_TRIGGERED, | |
1414 | &ipmi_acpi_gpe, | |
1415 | info); | |
1416 | if (status != AE_OK) { | |
1417 | printk(KERN_WARNING | |
1418 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1419 | " running polled\n", | |
1420 | DEVICE_NAME, info->irq); | |
1421 | info->irq = 0; | |
1422 | return -EINVAL; | |
1423 | } else { | |
1424 | printk(" Using ACPI GPE %d\n", info->irq); | |
1425 | return 0; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | static void acpi_gpe_irq_cleanup(struct smi_info *info) | |
1430 | { | |
1431 | if (!info->irq) | |
1432 | return; | |
1433 | ||
1434 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1435 | } | |
1436 | ||
1437 | /* | |
1438 | * Defined at | |
1439 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf | |
1440 | */ | |
1441 | struct SPMITable { | |
1442 | s8 Signature[4]; | |
1443 | u32 Length; | |
1444 | u8 Revision; | |
1445 | u8 Checksum; | |
1446 | s8 OEMID[6]; | |
1447 | s8 OEMTableID[8]; | |
1448 | s8 OEMRevision[4]; | |
1449 | s8 CreatorID[4]; | |
1450 | s8 CreatorRevision[4]; | |
1451 | u8 InterfaceType; | |
1452 | u8 IPMIlegacy; | |
1453 | s16 SpecificationRevision; | |
1454 | ||
1455 | /* | |
1456 | * Bit 0 - SCI interrupt supported | |
1457 | * Bit 1 - I/O APIC/SAPIC | |
1458 | */ | |
1459 | u8 InterruptType; | |
1460 | ||
1461 | /* If bit 0 of InterruptType is set, then this is the SCI | |
1462 | interrupt in the GPEx_STS register. */ | |
1463 | u8 GPE; | |
1464 | ||
1465 | s16 Reserved; | |
1466 | ||
1467 | /* If bit 1 of InterruptType is set, then this is the I/O | |
1468 | APIC/SAPIC interrupt. */ | |
1469 | u32 GlobalSystemInterrupt; | |
1470 | ||
1471 | /* The actual register address. */ | |
1472 | struct acpi_generic_address addr; | |
1473 | ||
1474 | u8 UID[4]; | |
1475 | ||
1476 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1477 | }; | |
1478 | ||
1479 | static int try_init_acpi(int intf_num, struct smi_info **new_info) | |
1480 | { | |
1481 | struct smi_info *info; | |
1482 | acpi_status status; | |
1483 | struct SPMITable *spmi; | |
1484 | char *io_type; | |
1485 | u8 addr_space; | |
1486 | ||
1487 | if (acpi_failure) | |
1488 | return -ENODEV; | |
1489 | ||
1490 | status = acpi_get_firmware_table("SPMI", intf_num+1, | |
1491 | ACPI_LOGICAL_ADDRESSING, | |
1492 | (struct acpi_table_header **) &spmi); | |
1493 | if (status != AE_OK) { | |
1494 | acpi_failure = 1; | |
1495 | return -ENODEV; | |
1496 | } | |
1497 | ||
1498 | if (spmi->IPMIlegacy != 1) { | |
1499 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
1500 | return -ENODEV; | |
1501 | } | |
1502 | ||
1503 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
1504 | addr_space = IPMI_MEM_ADDR_SPACE; | |
1505 | else | |
1506 | addr_space = IPMI_IO_ADDR_SPACE; | |
1507 | if (!is_new_interface(-1, addr_space, spmi->addr.address)) | |
1508 | return -ENODEV; | |
1509 | ||
1510 | if (!spmi->addr.register_bit_width) { | |
1511 | acpi_failure = 1; | |
1512 | return -ENODEV; | |
1513 | } | |
1514 | ||
1515 | /* Figure out the interface type. */ | |
1516 | switch (spmi->InterfaceType) | |
1517 | { | |
1518 | case 1: /* KCS */ | |
1519 | si_type[intf_num] = "kcs"; | |
1520 | break; | |
1521 | ||
1522 | case 2: /* SMIC */ | |
1523 | si_type[intf_num] = "smic"; | |
1524 | break; | |
1525 | ||
1526 | case 3: /* BT */ | |
1527 | si_type[intf_num] = "bt"; | |
1528 | break; | |
1529 | ||
1530 | default: | |
1531 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
1532 | spmi->InterfaceType); | |
1533 | return -EIO; | |
1534 | } | |
1535 | ||
1536 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1537 | if (!info) { | |
1538 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
1539 | return -ENOMEM; | |
1540 | } | |
1541 | memset(info, 0, sizeof(*info)); | |
1542 | ||
1543 | if (spmi->InterruptType & 1) { | |
1544 | /* We've got a GPE interrupt. */ | |
1545 | info->irq = spmi->GPE; | |
1546 | info->irq_setup = acpi_gpe_irq_setup; | |
1547 | info->irq_cleanup = acpi_gpe_irq_cleanup; | |
1548 | } else if (spmi->InterruptType & 2) { | |
1549 | /* We've got an APIC/SAPIC interrupt. */ | |
1550 | info->irq = spmi->GlobalSystemInterrupt; | |
1551 | info->irq_setup = std_irq_setup; | |
1552 | info->irq_cleanup = std_irq_cleanup; | |
1553 | } else { | |
1554 | /* Use the default interrupt setting. */ | |
1555 | info->irq = 0; | |
1556 | info->irq_setup = NULL; | |
1557 | } | |
1558 | ||
35bc37a0 CM |
1559 | if (spmi->addr.register_bit_width) { |
1560 | /* A (hopefully) properly formed register bit width. */ | |
1561 | regspacings[intf_num] = spmi->addr.register_bit_width / 8; | |
1562 | info->io.regspacing = spmi->addr.register_bit_width / 8; | |
1563 | } else { | |
1564 | /* Some broken systems get this wrong and set the value | |
1565 | * to zero. Assume it is the default spacing. If that | |
1566 | * is wrong, too bad, the vendor should fix the tables. */ | |
1567 | regspacings[intf_num] = DEFAULT_REGSPACING; | |
1568 | info->io.regspacing = DEFAULT_REGSPACING; | |
1569 | } | |
1da177e4 LT |
1570 | regsizes[intf_num] = regspacings[intf_num]; |
1571 | info->io.regsize = regsizes[intf_num]; | |
1572 | regshifts[intf_num] = spmi->addr.register_bit_offset; | |
1573 | info->io.regshift = regshifts[intf_num]; | |
1574 | ||
1575 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
1576 | io_type = "memory"; | |
1577 | info->io_setup = mem_setup; | |
1578 | addrs[intf_num] = spmi->addr.address; | |
1579 | info->io.info = &(addrs[intf_num]); | |
1580 | } else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) { | |
1581 | io_type = "I/O"; | |
1582 | info->io_setup = port_setup; | |
1583 | ports[intf_num] = spmi->addr.address; | |
1584 | info->io.info = &(ports[intf_num]); | |
1585 | } else { | |
1586 | kfree(info); | |
1587 | printk("ipmi_si: Unknown ACPI I/O Address type\n"); | |
1588 | return -EIO; | |
1589 | } | |
1590 | ||
1591 | *new_info = info; | |
1592 | ||
1593 | printk("ipmi_si: ACPI/SPMI specifies \"%s\" %s SI @ 0x%lx\n", | |
1594 | si_type[intf_num], io_type, (unsigned long) spmi->addr.address); | |
1595 | return 0; | |
1596 | } | |
1597 | #endif | |
1598 | ||
1599 | #ifdef CONFIG_X86 | |
1600 | typedef struct dmi_ipmi_data | |
1601 | { | |
1602 | u8 type; | |
1603 | u8 addr_space; | |
1604 | unsigned long base_addr; | |
1605 | u8 irq; | |
1606 | u8 offset; | |
1607 | u8 slave_addr; | |
1608 | } dmi_ipmi_data_t; | |
1609 | ||
1610 | static dmi_ipmi_data_t dmi_data[SI_MAX_DRIVERS]; | |
1611 | static int dmi_data_entries; | |
1612 | ||
1613 | typedef struct dmi_header | |
1614 | { | |
1615 | u8 type; | |
1616 | u8 length; | |
1617 | u16 handle; | |
1618 | } dmi_header_t; | |
1619 | ||
1b75d8ba | 1620 | static int decode_dmi(dmi_header_t __iomem *dm, int intf_num) |
1da177e4 | 1621 | { |
1b75d8ba | 1622 | u8 __iomem *data = (u8 __iomem *)dm; |
1da177e4 LT |
1623 | unsigned long base_addr; |
1624 | u8 reg_spacing; | |
1b75d8ba | 1625 | u8 len = readb(&dm->length); |
1da177e4 LT |
1626 | dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num; |
1627 | ||
1b75d8ba | 1628 | ipmi_data->type = readb(&data[4]); |
1da177e4 LT |
1629 | |
1630 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
1631 | if (len >= 0x11) { | |
1632 | if (base_addr & 1) { | |
1633 | /* I/O */ | |
1634 | base_addr &= 0xFFFE; | |
1635 | ipmi_data->addr_space = IPMI_IO_ADDR_SPACE; | |
1636 | } | |
1637 | else { | |
1638 | /* Memory */ | |
1639 | ipmi_data->addr_space = IPMI_MEM_ADDR_SPACE; | |
1640 | } | |
1641 | /* If bit 4 of byte 0x10 is set, then the lsb for the address | |
1642 | is odd. */ | |
1b75d8ba | 1643 | ipmi_data->base_addr = base_addr | ((readb(&data[0x10]) & 0x10) >> 4); |
1da177e4 | 1644 | |
1b75d8ba | 1645 | ipmi_data->irq = readb(&data[0x11]); |
1da177e4 LT |
1646 | |
1647 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
1b75d8ba | 1648 | reg_spacing = (readb(&data[0x10]) & 0xC0) >> 6; |
1da177e4 LT |
1649 | switch(reg_spacing){ |
1650 | case 0x00: /* Byte boundaries */ | |
1651 | ipmi_data->offset = 1; | |
1652 | break; | |
1653 | case 0x01: /* 32-bit boundaries */ | |
1654 | ipmi_data->offset = 4; | |
1655 | break; | |
1656 | case 0x02: /* 16-byte boundaries */ | |
1657 | ipmi_data->offset = 16; | |
1658 | break; | |
1659 | default: | |
1660 | /* Some other interface, just ignore it. */ | |
1661 | return -EIO; | |
1662 | } | |
1663 | } else { | |
1664 | /* Old DMI spec. */ | |
92068801 CM |
1665 | /* Note that technically, the lower bit of the base |
1666 | * address should be 1 if the address is I/O and 0 if | |
1667 | * the address is in memory. So many systems get that | |
1668 | * wrong (and all that I have seen are I/O) so we just | |
1669 | * ignore that bit and assume I/O. Systems that use | |
1670 | * memory should use the newer spec, anyway. */ | |
1671 | ipmi_data->base_addr = base_addr & 0xfffe; | |
1da177e4 LT |
1672 | ipmi_data->addr_space = IPMI_IO_ADDR_SPACE; |
1673 | ipmi_data->offset = 1; | |
1674 | } | |
1675 | ||
1b75d8ba | 1676 | ipmi_data->slave_addr = readb(&data[6]); |
1da177e4 LT |
1677 | |
1678 | if (is_new_interface(-1, ipmi_data->addr_space,ipmi_data->base_addr)) { | |
1679 | dmi_data_entries++; | |
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | memset(ipmi_data, 0, sizeof(dmi_ipmi_data_t)); | |
1684 | ||
1685 | return -1; | |
1686 | } | |
1687 | ||
1688 | static int dmi_table(u32 base, int len, int num) | |
1689 | { | |
1b75d8ba AV |
1690 | u8 __iomem *buf; |
1691 | struct dmi_header __iomem *dm; | |
1692 | u8 __iomem *data; | |
1da177e4 LT |
1693 | int i=1; |
1694 | int status=-1; | |
1695 | int intf_num = 0; | |
1696 | ||
1697 | buf = ioremap(base, len); | |
1698 | if(buf==NULL) | |
1699 | return -1; | |
1700 | ||
1701 | data = buf; | |
1702 | ||
1703 | while(i<num && (data - buf) < len) | |
1704 | { | |
1b75d8ba | 1705 | dm=(dmi_header_t __iomem *)data; |
1da177e4 | 1706 | |
1b75d8ba | 1707 | if((data-buf+readb(&dm->length)) >= len) |
1da177e4 LT |
1708 | break; |
1709 | ||
1b75d8ba | 1710 | if (readb(&dm->type) == 38) { |
1da177e4 LT |
1711 | if (decode_dmi(dm, intf_num) == 0) { |
1712 | intf_num++; | |
1713 | if (intf_num >= SI_MAX_DRIVERS) | |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | ||
1b75d8ba AV |
1718 | data+=readb(&dm->length); |
1719 | while((data-buf) < len && (readb(data)||readb(data+1))) | |
1da177e4 LT |
1720 | data++; |
1721 | data+=2; | |
1722 | i++; | |
1723 | } | |
1724 | iounmap(buf); | |
1725 | ||
1726 | return status; | |
1727 | } | |
1728 | ||
77933d72 | 1729 | static inline int dmi_checksum(u8 *buf) |
1da177e4 LT |
1730 | { |
1731 | u8 sum=0; | |
1732 | int a; | |
1733 | ||
1734 | for(a=0; a<15; a++) | |
1735 | sum+=buf[a]; | |
1736 | return (sum==0); | |
1737 | } | |
1738 | ||
1739 | static int dmi_decode(void) | |
1740 | { | |
1741 | u8 buf[15]; | |
1742 | u32 fp=0xF0000; | |
1743 | ||
1744 | #ifdef CONFIG_SIMNOW | |
1745 | return -1; | |
1746 | #endif | |
1747 | ||
1748 | while(fp < 0xFFFFF) | |
1749 | { | |
1750 | isa_memcpy_fromio(buf, fp, 15); | |
1751 | if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf)) | |
1752 | { | |
1753 | u16 num=buf[13]<<8|buf[12]; | |
1754 | u16 len=buf[7]<<8|buf[6]; | |
1755 | u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8]; | |
1756 | ||
1757 | if(dmi_table(base, len, num) == 0) | |
1758 | return 0; | |
1759 | } | |
1760 | fp+=16; | |
1761 | } | |
1762 | ||
1763 | return -1; | |
1764 | } | |
1765 | ||
1766 | static int try_init_smbios(int intf_num, struct smi_info **new_info) | |
1767 | { | |
1768 | struct smi_info *info; | |
1769 | dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num; | |
1770 | char *io_type; | |
1771 | ||
1772 | if (intf_num >= dmi_data_entries) | |
1773 | return -ENODEV; | |
1774 | ||
1775 | switch(ipmi_data->type) { | |
1776 | case 0x01: /* KCS */ | |
1777 | si_type[intf_num] = "kcs"; | |
1778 | break; | |
1779 | case 0x02: /* SMIC */ | |
1780 | si_type[intf_num] = "smic"; | |
1781 | break; | |
1782 | case 0x03: /* BT */ | |
1783 | si_type[intf_num] = "bt"; | |
1784 | break; | |
1785 | default: | |
1786 | return -EIO; | |
1787 | } | |
1788 | ||
1789 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1790 | if (!info) { | |
1791 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (4)\n"); | |
1792 | return -ENOMEM; | |
1793 | } | |
1794 | memset(info, 0, sizeof(*info)); | |
1795 | ||
1796 | if (ipmi_data->addr_space == 1) { | |
1797 | io_type = "memory"; | |
1798 | info->io_setup = mem_setup; | |
1799 | addrs[intf_num] = ipmi_data->base_addr; | |
1800 | info->io.info = &(addrs[intf_num]); | |
1801 | } else if (ipmi_data->addr_space == 2) { | |
1802 | io_type = "I/O"; | |
1803 | info->io_setup = port_setup; | |
1804 | ports[intf_num] = ipmi_data->base_addr; | |
1805 | info->io.info = &(ports[intf_num]); | |
1806 | } else { | |
1807 | kfree(info); | |
1808 | printk("ipmi_si: Unknown SMBIOS I/O Address type.\n"); | |
1809 | return -EIO; | |
1810 | } | |
1811 | ||
1812 | regspacings[intf_num] = ipmi_data->offset; | |
1813 | info->io.regspacing = regspacings[intf_num]; | |
1814 | if (!info->io.regspacing) | |
1815 | info->io.regspacing = DEFAULT_REGSPACING; | |
1816 | info->io.regsize = DEFAULT_REGSPACING; | |
1817 | info->io.regshift = regshifts[intf_num]; | |
1818 | ||
1819 | info->slave_addr = ipmi_data->slave_addr; | |
1820 | ||
1821 | irqs[intf_num] = ipmi_data->irq; | |
1822 | ||
1823 | *new_info = info; | |
1824 | ||
1825 | printk("ipmi_si: Found SMBIOS-specified state machine at %s" | |
1826 | " address 0x%lx, slave address 0x%x\n", | |
1827 | io_type, (unsigned long)ipmi_data->base_addr, | |
1828 | ipmi_data->slave_addr); | |
1829 | return 0; | |
1830 | } | |
1831 | #endif /* CONFIG_X86 */ | |
1832 | ||
1833 | #ifdef CONFIG_PCI | |
1834 | ||
1835 | #define PCI_ERMC_CLASSCODE 0x0C0700 | |
1836 | #define PCI_HP_VENDOR_ID 0x103C | |
1837 | #define PCI_MMC_DEVICE_ID 0x121A | |
1838 | #define PCI_MMC_ADDR_CW 0x10 | |
1839 | ||
1840 | /* Avoid more than one attempt to probe pci smic. */ | |
1841 | static int pci_smic_checked = 0; | |
1842 | ||
1843 | static int find_pci_smic(int intf_num, struct smi_info **new_info) | |
1844 | { | |
1845 | struct smi_info *info; | |
1846 | int error; | |
1847 | struct pci_dev *pci_dev = NULL; | |
1848 | u16 base_addr; | |
1849 | int fe_rmc = 0; | |
1850 | ||
1851 | if (pci_smic_checked) | |
1852 | return -ENODEV; | |
1853 | ||
1854 | pci_smic_checked = 1; | |
1855 | ||
1856 | if ((pci_dev = pci_get_device(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID, | |
1857 | NULL))) | |
1858 | ; | |
1859 | else if ((pci_dev = pci_get_class(PCI_ERMC_CLASSCODE, NULL)) && | |
1860 | pci_dev->subsystem_vendor == PCI_HP_VENDOR_ID) | |
1861 | fe_rmc = 1; | |
1862 | else | |
1863 | return -ENODEV; | |
1864 | ||
1865 | error = pci_read_config_word(pci_dev, PCI_MMC_ADDR_CW, &base_addr); | |
1866 | if (error) | |
1867 | { | |
1868 | pci_dev_put(pci_dev); | |
1869 | printk(KERN_ERR | |
1870 | "ipmi_si: pci_read_config_word() failed (%d).\n", | |
1871 | error); | |
1872 | return -ENODEV; | |
1873 | } | |
1874 | ||
1875 | /* Bit 0: 1 specifies programmed I/O, 0 specifies memory mapped I/O */ | |
1876 | if (!(base_addr & 0x0001)) | |
1877 | { | |
1878 | pci_dev_put(pci_dev); | |
1879 | printk(KERN_ERR | |
1880 | "ipmi_si: memory mapped I/O not supported for PCI" | |
1881 | " smic.\n"); | |
1882 | return -ENODEV; | |
1883 | } | |
1884 | ||
1885 | base_addr &= 0xFFFE; | |
1886 | if (!fe_rmc) | |
1887 | /* Data register starts at base address + 1 in eRMC */ | |
1888 | ++base_addr; | |
1889 | ||
1890 | if (!is_new_interface(-1, IPMI_IO_ADDR_SPACE, base_addr)) { | |
1891 | pci_dev_put(pci_dev); | |
1892 | return -ENODEV; | |
1893 | } | |
1894 | ||
1895 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1896 | if (!info) { | |
1897 | pci_dev_put(pci_dev); | |
1898 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (5)\n"); | |
1899 | return -ENOMEM; | |
1900 | } | |
1901 | memset(info, 0, sizeof(*info)); | |
1902 | ||
1903 | info->io_setup = port_setup; | |
1904 | ports[intf_num] = base_addr; | |
1905 | info->io.info = &(ports[intf_num]); | |
1906 | info->io.regspacing = regspacings[intf_num]; | |
1907 | if (!info->io.regspacing) | |
1908 | info->io.regspacing = DEFAULT_REGSPACING; | |
1909 | info->io.regsize = DEFAULT_REGSPACING; | |
1910 | info->io.regshift = regshifts[intf_num]; | |
1911 | ||
1912 | *new_info = info; | |
1913 | ||
1914 | irqs[intf_num] = pci_dev->irq; | |
1915 | si_type[intf_num] = "smic"; | |
1916 | ||
1917 | printk("ipmi_si: Found PCI SMIC at I/O address 0x%lx\n", | |
1918 | (long unsigned int) base_addr); | |
1919 | ||
1920 | pci_dev_put(pci_dev); | |
1921 | return 0; | |
1922 | } | |
1923 | #endif /* CONFIG_PCI */ | |
1924 | ||
1925 | static int try_init_plug_and_play(int intf_num, struct smi_info **new_info) | |
1926 | { | |
1927 | #ifdef CONFIG_PCI | |
1928 | if (find_pci_smic(intf_num, new_info)==0) | |
1929 | return 0; | |
1930 | #endif | |
1931 | /* Include other methods here. */ | |
1932 | ||
1933 | return -ENODEV; | |
1934 | } | |
1935 | ||
1936 | ||
1937 | static int try_get_dev_id(struct smi_info *smi_info) | |
1938 | { | |
1939 | unsigned char msg[2]; | |
1940 | unsigned char *resp; | |
1941 | unsigned long resp_len; | |
1942 | enum si_sm_result smi_result; | |
1943 | int rv = 0; | |
1944 | ||
1945 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
1946 | if (!resp) | |
1947 | return -ENOMEM; | |
1948 | ||
1949 | /* Do a Get Device ID command, since it comes back with some | |
1950 | useful info. */ | |
1951 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1952 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
1953 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1954 | ||
1955 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
1956 | for (;;) | |
1957 | { | |
1958 | if (smi_result == SI_SM_CALL_WITH_DELAY) { | |
1959 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1960 | schedule_timeout(1); | |
1961 | smi_result = smi_info->handlers->event( | |
1962 | smi_info->si_sm, 100); | |
1963 | } | |
1964 | else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) | |
1965 | { | |
1966 | smi_result = smi_info->handlers->event( | |
1967 | smi_info->si_sm, 0); | |
1968 | } | |
1969 | else | |
1970 | break; | |
1971 | } | |
1972 | if (smi_result == SI_SM_HOSED) { | |
1973 | /* We couldn't get the state machine to run, so whatever's at | |
1974 | the port is probably not an IPMI SMI interface. */ | |
1975 | rv = -ENODEV; | |
1976 | goto out; | |
1977 | } | |
1978 | ||
1979 | /* Otherwise, we got some data. */ | |
1980 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1981 | resp, IPMI_MAX_MSG_LENGTH); | |
1982 | if (resp_len < 6) { | |
1983 | /* That's odd, it should be longer. */ | |
1984 | rv = -EINVAL; | |
1985 | goto out; | |
1986 | } | |
1987 | ||
1988 | if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) { | |
1989 | /* That's odd, it shouldn't be able to fail. */ | |
1990 | rv = -EINVAL; | |
1991 | goto out; | |
1992 | } | |
1993 | ||
1994 | /* Record info from the get device id, in case we need it. */ | |
1995 | smi_info->ipmi_si_dev_rev = resp[4] & 0xf; | |
1996 | smi_info->ipmi_si_fw_rev_major = resp[5] & 0x7f; | |
1997 | smi_info->ipmi_si_fw_rev_minor = resp[6]; | |
1998 | smi_info->ipmi_version_major = resp[7] & 0xf; | |
1999 | smi_info->ipmi_version_minor = resp[7] >> 4; | |
2000 | ||
2001 | out: | |
2002 | kfree(resp); | |
2003 | return rv; | |
2004 | } | |
2005 | ||
2006 | static int type_file_read_proc(char *page, char **start, off_t off, | |
2007 | int count, int *eof, void *data) | |
2008 | { | |
2009 | char *out = (char *) page; | |
2010 | struct smi_info *smi = data; | |
2011 | ||
2012 | switch (smi->si_type) { | |
2013 | case SI_KCS: | |
2014 | return sprintf(out, "kcs\n"); | |
2015 | case SI_SMIC: | |
2016 | return sprintf(out, "smic\n"); | |
2017 | case SI_BT: | |
2018 | return sprintf(out, "bt\n"); | |
2019 | default: | |
2020 | return 0; | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2025 | int count, int *eof, void *data) | |
2026 | { | |
2027 | char *out = (char *) page; | |
2028 | struct smi_info *smi = data; | |
2029 | ||
2030 | out += sprintf(out, "interrupts_enabled: %d\n", | |
2031 | smi->irq && !smi->interrupt_disabled); | |
2032 | out += sprintf(out, "short_timeouts: %ld\n", | |
2033 | smi->short_timeouts); | |
2034 | out += sprintf(out, "long_timeouts: %ld\n", | |
2035 | smi->long_timeouts); | |
2036 | out += sprintf(out, "timeout_restarts: %ld\n", | |
2037 | smi->timeout_restarts); | |
2038 | out += sprintf(out, "idles: %ld\n", | |
2039 | smi->idles); | |
2040 | out += sprintf(out, "interrupts: %ld\n", | |
2041 | smi->interrupts); | |
2042 | out += sprintf(out, "attentions: %ld\n", | |
2043 | smi->attentions); | |
2044 | out += sprintf(out, "flag_fetches: %ld\n", | |
2045 | smi->flag_fetches); | |
2046 | out += sprintf(out, "hosed_count: %ld\n", | |
2047 | smi->hosed_count); | |
2048 | out += sprintf(out, "complete_transactions: %ld\n", | |
2049 | smi->complete_transactions); | |
2050 | out += sprintf(out, "events: %ld\n", | |
2051 | smi->events); | |
2052 | out += sprintf(out, "watchdog_pretimeouts: %ld\n", | |
2053 | smi->watchdog_pretimeouts); | |
2054 | out += sprintf(out, "incoming_messages: %ld\n", | |
2055 | smi->incoming_messages); | |
2056 | ||
2057 | return (out - ((char *) page)); | |
2058 | } | |
2059 | ||
2060 | /* Returns 0 if initialized, or negative on an error. */ | |
2061 | static int init_one_smi(int intf_num, struct smi_info **smi) | |
2062 | { | |
2063 | int rv; | |
2064 | struct smi_info *new_smi; | |
2065 | ||
2066 | ||
2067 | rv = try_init_mem(intf_num, &new_smi); | |
2068 | if (rv) | |
2069 | rv = try_init_port(intf_num, &new_smi); | |
2070 | #ifdef CONFIG_ACPI_INTERPRETER | |
2071 | if ((rv) && (si_trydefaults)) { | |
2072 | rv = try_init_acpi(intf_num, &new_smi); | |
2073 | } | |
2074 | #endif | |
2075 | #ifdef CONFIG_X86 | |
2076 | if ((rv) && (si_trydefaults)) { | |
2077 | rv = try_init_smbios(intf_num, &new_smi); | |
2078 | } | |
2079 | #endif | |
2080 | if ((rv) && (si_trydefaults)) { | |
2081 | rv = try_init_plug_and_play(intf_num, &new_smi); | |
2082 | } | |
2083 | ||
2084 | ||
2085 | if (rv) | |
2086 | return rv; | |
2087 | ||
2088 | /* So we know not to free it unless we have allocated one. */ | |
2089 | new_smi->intf = NULL; | |
2090 | new_smi->si_sm = NULL; | |
2091 | new_smi->handlers = NULL; | |
2092 | ||
2093 | if (!new_smi->irq_setup) { | |
2094 | new_smi->irq = irqs[intf_num]; | |
2095 | new_smi->irq_setup = std_irq_setup; | |
2096 | new_smi->irq_cleanup = std_irq_cleanup; | |
2097 | } | |
2098 | ||
2099 | /* Default to KCS if no type is specified. */ | |
2100 | if (si_type[intf_num] == NULL) { | |
2101 | if (si_trydefaults) | |
2102 | si_type[intf_num] = "kcs"; | |
2103 | else { | |
2104 | rv = -EINVAL; | |
2105 | goto out_err; | |
2106 | } | |
2107 | } | |
2108 | ||
2109 | /* Set up the state machine to use. */ | |
2110 | if (strcmp(si_type[intf_num], "kcs") == 0) { | |
2111 | new_smi->handlers = &kcs_smi_handlers; | |
2112 | new_smi->si_type = SI_KCS; | |
2113 | } else if (strcmp(si_type[intf_num], "smic") == 0) { | |
2114 | new_smi->handlers = &smic_smi_handlers; | |
2115 | new_smi->si_type = SI_SMIC; | |
2116 | } else if (strcmp(si_type[intf_num], "bt") == 0) { | |
2117 | new_smi->handlers = &bt_smi_handlers; | |
2118 | new_smi->si_type = SI_BT; | |
2119 | } else { | |
2120 | /* No support for anything else yet. */ | |
2121 | rv = -EIO; | |
2122 | goto out_err; | |
2123 | } | |
2124 | ||
2125 | /* Allocate the state machine's data and initialize it. */ | |
2126 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
2127 | if (!new_smi->si_sm) { | |
2128 | printk(" Could not allocate state machine memory\n"); | |
2129 | rv = -ENOMEM; | |
2130 | goto out_err; | |
2131 | } | |
2132 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
2133 | &new_smi->io); | |
2134 | ||
2135 | /* Now that we know the I/O size, we can set up the I/O. */ | |
2136 | rv = new_smi->io_setup(new_smi); | |
2137 | if (rv) { | |
2138 | printk(" Could not set up I/O space\n"); | |
2139 | goto out_err; | |
2140 | } | |
2141 | ||
2142 | spin_lock_init(&(new_smi->si_lock)); | |
2143 | spin_lock_init(&(new_smi->msg_lock)); | |
2144 | spin_lock_init(&(new_smi->count_lock)); | |
2145 | ||
2146 | /* Do low-level detection first. */ | |
2147 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
2148 | rv = -ENODEV; | |
2149 | goto out_err; | |
2150 | } | |
2151 | ||
2152 | /* Attempt a get device id command. If it fails, we probably | |
2153 | don't have a SMI here. */ | |
2154 | rv = try_get_dev_id(new_smi); | |
2155 | if (rv) | |
2156 | goto out_err; | |
2157 | ||
2158 | /* Try to claim any interrupts. */ | |
2159 | new_smi->irq_setup(new_smi); | |
2160 | ||
2161 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); | |
2162 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
2163 | new_smi->curr_msg = NULL; | |
2164 | atomic_set(&new_smi->req_events, 0); | |
2165 | new_smi->run_to_completion = 0; | |
2166 | ||
2167 | new_smi->interrupt_disabled = 0; | |
2168 | new_smi->timer_stopped = 0; | |
2169 | new_smi->stop_operation = 0; | |
2170 | ||
2171 | /* Start clearing the flags before we enable interrupts or the | |
2172 | timer to avoid racing with the timer. */ | |
2173 | start_clear_flags(new_smi); | |
2174 | /* IRQ is defined to be set when non-zero. */ | |
2175 | if (new_smi->irq) | |
2176 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
2177 | ||
2178 | /* The ipmi_register_smi() code does some operations to | |
2179 | determine the channel information, so we must be ready to | |
2180 | handle operations before it is called. This means we have | |
2181 | to stop the timer if we get an error after this point. */ | |
2182 | init_timer(&(new_smi->si_timer)); | |
2183 | new_smi->si_timer.data = (long) new_smi; | |
2184 | new_smi->si_timer.function = smi_timeout; | |
2185 | new_smi->last_timeout_jiffies = jiffies; | |
2186 | new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
2187 | add_timer(&(new_smi->si_timer)); | |
2188 | ||
2189 | rv = ipmi_register_smi(&handlers, | |
2190 | new_smi, | |
2191 | new_smi->ipmi_version_major, | |
2192 | new_smi->ipmi_version_minor, | |
2193 | new_smi->slave_addr, | |
2194 | &(new_smi->intf)); | |
2195 | if (rv) { | |
2196 | printk(KERN_ERR | |
2197 | "ipmi_si: Unable to register device: error %d\n", | |
2198 | rv); | |
2199 | goto out_err_stop_timer; | |
2200 | } | |
2201 | ||
2202 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
2203 | type_file_read_proc, NULL, | |
2204 | new_smi, THIS_MODULE); | |
2205 | if (rv) { | |
2206 | printk(KERN_ERR | |
2207 | "ipmi_si: Unable to create proc entry: %d\n", | |
2208 | rv); | |
2209 | goto out_err_stop_timer; | |
2210 | } | |
2211 | ||
2212 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
2213 | stat_file_read_proc, NULL, | |
2214 | new_smi, THIS_MODULE); | |
2215 | if (rv) { | |
2216 | printk(KERN_ERR | |
2217 | "ipmi_si: Unable to create proc entry: %d\n", | |
2218 | rv); | |
2219 | goto out_err_stop_timer; | |
2220 | } | |
2221 | ||
2222 | *smi = new_smi; | |
2223 | ||
2224 | printk(" IPMI %s interface initialized\n", si_type[intf_num]); | |
2225 | ||
2226 | return 0; | |
2227 | ||
2228 | out_err_stop_timer: | |
2229 | new_smi->stop_operation = 1; | |
2230 | ||
2231 | /* Wait for the timer to stop. This avoids problems with race | |
2232 | conditions removing the timer here. */ | |
2233 | while (!new_smi->timer_stopped) { | |
2234 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2235 | schedule_timeout(1); | |
2236 | } | |
2237 | ||
2238 | out_err: | |
2239 | if (new_smi->intf) | |
2240 | ipmi_unregister_smi(new_smi->intf); | |
2241 | ||
2242 | new_smi->irq_cleanup(new_smi); | |
2243 | ||
2244 | /* Wait until we know that we are out of any interrupt | |
2245 | handlers might have been running before we freed the | |
2246 | interrupt. */ | |
fbd568a3 | 2247 | synchronize_sched(); |
1da177e4 LT |
2248 | |
2249 | if (new_smi->si_sm) { | |
2250 | if (new_smi->handlers) | |
2251 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2252 | kfree(new_smi->si_sm); | |
2253 | } | |
2254 | new_smi->io_cleanup(new_smi); | |
2255 | ||
2256 | return rv; | |
2257 | } | |
2258 | ||
2259 | static __init int init_ipmi_si(void) | |
2260 | { | |
2261 | int rv = 0; | |
2262 | int pos = 0; | |
2263 | int i; | |
2264 | char *str; | |
2265 | ||
2266 | if (initialized) | |
2267 | return 0; | |
2268 | initialized = 1; | |
2269 | ||
2270 | /* Parse out the si_type string into its components. */ | |
2271 | str = si_type_str; | |
2272 | if (*str != '\0') { | |
2273 | for (i=0; (i<SI_MAX_PARMS) && (*str != '\0'); i++) { | |
2274 | si_type[i] = str; | |
2275 | str = strchr(str, ','); | |
2276 | if (str) { | |
2277 | *str = '\0'; | |
2278 | str++; | |
2279 | } else { | |
2280 | break; | |
2281 | } | |
2282 | } | |
2283 | } | |
2284 | ||
2285 | printk(KERN_INFO "IPMI System Interface driver version " | |
2286 | IPMI_SI_VERSION); | |
2287 | if (kcs_smi_handlers.version) | |
2288 | printk(", KCS version %s", kcs_smi_handlers.version); | |
2289 | if (smic_smi_handlers.version) | |
2290 | printk(", SMIC version %s", smic_smi_handlers.version); | |
2291 | if (bt_smi_handlers.version) | |
2292 | printk(", BT version %s", bt_smi_handlers.version); | |
2293 | printk("\n"); | |
2294 | ||
2295 | #ifdef CONFIG_X86 | |
2296 | dmi_decode(); | |
2297 | #endif | |
2298 | ||
2299 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2300 | if (rv && !ports[0] && si_trydefaults) { | |
2301 | /* If we are trying defaults and the initial port is | |
2302 | not set, then set it. */ | |
2303 | si_type[0] = "kcs"; | |
2304 | ports[0] = DEFAULT_KCS_IO_PORT; | |
2305 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2306 | if (rv) { | |
2307 | /* No KCS - try SMIC */ | |
2308 | si_type[0] = "smic"; | |
2309 | ports[0] = DEFAULT_SMIC_IO_PORT; | |
2310 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2311 | } | |
2312 | if (rv) { | |
2313 | /* No SMIC - try BT */ | |
2314 | si_type[0] = "bt"; | |
2315 | ports[0] = DEFAULT_BT_IO_PORT; | |
2316 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2317 | } | |
2318 | } | |
2319 | if (rv == 0) | |
2320 | pos++; | |
2321 | ||
2322 | for (i=1; i < SI_MAX_PARMS; i++) { | |
2323 | rv = init_one_smi(i, &(smi_infos[pos])); | |
2324 | if (rv == 0) | |
2325 | pos++; | |
2326 | } | |
2327 | ||
2328 | if (smi_infos[0] == NULL) { | |
2329 | printk("ipmi_si: Unable to find any System Interface(s)\n"); | |
2330 | return -ENODEV; | |
2331 | } | |
2332 | ||
2333 | return 0; | |
2334 | } | |
2335 | module_init(init_ipmi_si); | |
2336 | ||
2337 | static void __exit cleanup_one_si(struct smi_info *to_clean) | |
2338 | { | |
2339 | int rv; | |
2340 | unsigned long flags; | |
2341 | ||
2342 | if (! to_clean) | |
2343 | return; | |
2344 | ||
2345 | /* Tell the timer and interrupt handlers that we are shutting | |
2346 | down. */ | |
2347 | spin_lock_irqsave(&(to_clean->si_lock), flags); | |
2348 | spin_lock(&(to_clean->msg_lock)); | |
2349 | ||
2350 | to_clean->stop_operation = 1; | |
2351 | ||
2352 | to_clean->irq_cleanup(to_clean); | |
2353 | ||
2354 | spin_unlock(&(to_clean->msg_lock)); | |
2355 | spin_unlock_irqrestore(&(to_clean->si_lock), flags); | |
2356 | ||
2357 | /* Wait until we know that we are out of any interrupt | |
2358 | handlers might have been running before we freed the | |
2359 | interrupt. */ | |
fbd568a3 | 2360 | synchronize_sched(); |
1da177e4 LT |
2361 | |
2362 | /* Wait for the timer to stop. This avoids problems with race | |
2363 | conditions removing the timer here. */ | |
2364 | while (!to_clean->timer_stopped) { | |
2365 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2366 | schedule_timeout(1); | |
2367 | } | |
2368 | ||
2369 | /* Interrupts and timeouts are stopped, now make sure the | |
2370 | interface is in a clean state. */ | |
2371 | while ((to_clean->curr_msg) || (to_clean->si_state != SI_NORMAL)) { | |
2372 | poll(to_clean); | |
2373 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2374 | schedule_timeout(1); | |
2375 | } | |
2376 | ||
2377 | rv = ipmi_unregister_smi(to_clean->intf); | |
2378 | if (rv) { | |
2379 | printk(KERN_ERR | |
2380 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
2381 | rv); | |
2382 | } | |
2383 | ||
2384 | to_clean->handlers->cleanup(to_clean->si_sm); | |
2385 | ||
2386 | kfree(to_clean->si_sm); | |
2387 | ||
2388 | to_clean->io_cleanup(to_clean); | |
2389 | } | |
2390 | ||
2391 | static __exit void cleanup_ipmi_si(void) | |
2392 | { | |
2393 | int i; | |
2394 | ||
2395 | if (!initialized) | |
2396 | return; | |
2397 | ||
2398 | for (i=0; i<SI_MAX_DRIVERS; i++) { | |
2399 | cleanup_one_si(smi_infos[i]); | |
2400 | } | |
2401 | } | |
2402 | module_exit(cleanup_ipmi_si); | |
2403 | ||
2404 | MODULE_LICENSE("GPL"); |