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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> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 LT |
57 | #include <asm/irq.h> |
58 | #ifdef CONFIG_HIGH_RES_TIMERS | |
59 | #include <linux/hrtime.h> | |
60 | # if defined(schedule_next_int) | |
61 | /* Old high-res timer code, do translations. */ | |
62 | # define get_arch_cycles(a) quick_update_jiffies_sub(a) | |
63 | # define arch_cycles_per_jiffy cycles_per_jiffies | |
64 | # endif | |
65 | static inline void add_usec_to_timer(struct timer_list *t, long v) | |
66 | { | |
75b0768a CM |
67 | t->arch_cycle_expires += nsec_to_arch_cycle(v * 1000); |
68 | while (t->arch_cycle_expires >= arch_cycles_per_jiffy) | |
1da177e4 LT |
69 | { |
70 | t->expires++; | |
75b0768a | 71 | t->arch_cycle_expires -= arch_cycles_per_jiffy; |
1da177e4 LT |
72 | } |
73 | } | |
74 | #endif | |
75 | #include <linux/interrupt.h> | |
76 | #include <linux/rcupdate.h> | |
77 | #include <linux/ipmi_smi.h> | |
78 | #include <asm/io.h> | |
79 | #include "ipmi_si_sm.h" | |
80 | #include <linux/init.h> | |
b224cd3a | 81 | #include <linux/dmi.h> |
1da177e4 LT |
82 | |
83 | /* Measure times between events in the driver. */ | |
84 | #undef DEBUG_TIMING | |
85 | ||
86 | /* Call every 10 ms. */ | |
87 | #define SI_TIMEOUT_TIME_USEC 10000 | |
88 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
89 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
90 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
91 | short timeout */ | |
92 | ||
93 | enum si_intf_state { | |
94 | SI_NORMAL, | |
95 | SI_GETTING_FLAGS, | |
96 | SI_GETTING_EVENTS, | |
97 | SI_CLEARING_FLAGS, | |
98 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
99 | SI_GETTING_MESSAGES, | |
100 | SI_ENABLE_INTERRUPTS1, | |
101 | SI_ENABLE_INTERRUPTS2 | |
102 | /* FIXME - add watchdog stuff. */ | |
103 | }; | |
104 | ||
9dbf68f9 CM |
105 | /* Some BT-specific defines we need here. */ |
106 | #define IPMI_BT_INTMASK_REG 2 | |
107 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
108 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
109 | ||
1da177e4 LT |
110 | enum si_type { |
111 | SI_KCS, SI_SMIC, SI_BT | |
112 | }; | |
b0defcdb | 113 | static char *si_to_str[] = { "KCS", "SMIC", "BT" }; |
1da177e4 | 114 | |
50c812b2 CM |
115 | #define DEVICE_NAME "ipmi_si" |
116 | ||
117 | static struct device_driver ipmi_driver = | |
118 | { | |
119 | .name = DEVICE_NAME, | |
120 | .bus = &platform_bus_type | |
121 | }; | |
3ae0e0f9 | 122 | |
1da177e4 LT |
123 | struct smi_info |
124 | { | |
a9a2c44f | 125 | int intf_num; |
1da177e4 LT |
126 | ipmi_smi_t intf; |
127 | struct si_sm_data *si_sm; | |
128 | struct si_sm_handlers *handlers; | |
129 | enum si_type si_type; | |
130 | spinlock_t si_lock; | |
131 | spinlock_t msg_lock; | |
132 | struct list_head xmit_msgs; | |
133 | struct list_head hp_xmit_msgs; | |
134 | struct ipmi_smi_msg *curr_msg; | |
135 | enum si_intf_state si_state; | |
136 | ||
137 | /* Used to handle the various types of I/O that can occur with | |
138 | IPMI */ | |
139 | struct si_sm_io io; | |
140 | int (*io_setup)(struct smi_info *info); | |
141 | void (*io_cleanup)(struct smi_info *info); | |
142 | int (*irq_setup)(struct smi_info *info); | |
143 | void (*irq_cleanup)(struct smi_info *info); | |
144 | unsigned int io_size; | |
b0defcdb CM |
145 | char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */ |
146 | void (*addr_source_cleanup)(struct smi_info *info); | |
147 | void *addr_source_data; | |
1da177e4 | 148 | |
3ae0e0f9 CM |
149 | /* Per-OEM handler, called from handle_flags(). |
150 | Returns 1 when handle_flags() needs to be re-run | |
151 | or 0 indicating it set si_state itself. | |
152 | */ | |
153 | int (*oem_data_avail_handler)(struct smi_info *smi_info); | |
154 | ||
1da177e4 LT |
155 | /* Flags from the last GET_MSG_FLAGS command, used when an ATTN |
156 | is set to hold the flags until we are done handling everything | |
157 | from the flags. */ | |
158 | #define RECEIVE_MSG_AVAIL 0x01 | |
159 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
160 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
161 | #define OEM0_DATA_AVAIL 0x20 |
162 | #define OEM1_DATA_AVAIL 0x40 | |
163 | #define OEM2_DATA_AVAIL 0x80 | |
164 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
165 | OEM1_DATA_AVAIL | \ | |
166 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
167 | unsigned char msg_flags; |
168 | ||
169 | /* If set to true, this will request events the next time the | |
170 | state machine is idle. */ | |
171 | atomic_t req_events; | |
172 | ||
173 | /* If true, run the state machine to completion on every send | |
174 | call. Generally used after a panic to make sure stuff goes | |
175 | out. */ | |
176 | int run_to_completion; | |
177 | ||
178 | /* The I/O port of an SI interface. */ | |
179 | int port; | |
180 | ||
181 | /* The space between start addresses of the two ports. For | |
182 | instance, if the first port is 0xca2 and the spacing is 4, then | |
183 | the second port is 0xca6. */ | |
184 | unsigned int spacing; | |
185 | ||
186 | /* zero if no irq; */ | |
187 | int irq; | |
188 | ||
189 | /* The timer for this si. */ | |
190 | struct timer_list si_timer; | |
191 | ||
192 | /* The time (in jiffies) the last timeout occurred at. */ | |
193 | unsigned long last_timeout_jiffies; | |
194 | ||
195 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 196 | atomic_t stop_operation; |
1da177e4 LT |
197 | |
198 | /* The driver will disable interrupts when it gets into a | |
199 | situation where it cannot handle messages due to lack of | |
200 | memory. Once that situation clears up, it will re-enable | |
201 | interrupts. */ | |
202 | int interrupt_disabled; | |
203 | ||
50c812b2 | 204 | /* From the get device id response... */ |
3ae0e0f9 | 205 | struct ipmi_device_id device_id; |
1da177e4 | 206 | |
50c812b2 CM |
207 | /* Driver model stuff. */ |
208 | struct device *dev; | |
209 | struct platform_device *pdev; | |
210 | ||
211 | /* True if we allocated the device, false if it came from | |
212 | * someplace else (like PCI). */ | |
213 | int dev_registered; | |
214 | ||
1da177e4 LT |
215 | /* Slave address, could be reported from DMI. */ |
216 | unsigned char slave_addr; | |
217 | ||
218 | /* Counters and things for the proc filesystem. */ | |
219 | spinlock_t count_lock; | |
220 | unsigned long short_timeouts; | |
221 | unsigned long long_timeouts; | |
222 | unsigned long timeout_restarts; | |
223 | unsigned long idles; | |
224 | unsigned long interrupts; | |
225 | unsigned long attentions; | |
226 | unsigned long flag_fetches; | |
227 | unsigned long hosed_count; | |
228 | unsigned long complete_transactions; | |
229 | unsigned long events; | |
230 | unsigned long watchdog_pretimeouts; | |
231 | unsigned long incoming_messages; | |
a9a2c44f | 232 | |
e9a705a0 | 233 | struct task_struct *thread; |
b0defcdb CM |
234 | |
235 | struct list_head link; | |
1da177e4 LT |
236 | }; |
237 | ||
b0defcdb CM |
238 | static int try_smi_init(struct smi_info *smi); |
239 | ||
e041c683 | 240 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
ea94027b CM |
241 | static int register_xaction_notifier(struct notifier_block * nb) |
242 | { | |
e041c683 | 243 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
244 | } |
245 | ||
1da177e4 LT |
246 | static void si_restart_short_timer(struct smi_info *smi_info); |
247 | ||
248 | static void deliver_recv_msg(struct smi_info *smi_info, | |
249 | struct ipmi_smi_msg *msg) | |
250 | { | |
251 | /* Deliver the message to the upper layer with the lock | |
252 | released. */ | |
253 | spin_unlock(&(smi_info->si_lock)); | |
254 | ipmi_smi_msg_received(smi_info->intf, msg); | |
255 | spin_lock(&(smi_info->si_lock)); | |
256 | } | |
257 | ||
258 | static void return_hosed_msg(struct smi_info *smi_info) | |
259 | { | |
260 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
261 | ||
262 | /* Make it a reponse */ | |
263 | msg->rsp[0] = msg->data[0] | 4; | |
264 | msg->rsp[1] = msg->data[1]; | |
265 | msg->rsp[2] = 0xFF; /* Unknown error. */ | |
266 | msg->rsp_size = 3; | |
267 | ||
268 | smi_info->curr_msg = NULL; | |
269 | deliver_recv_msg(smi_info, msg); | |
270 | } | |
271 | ||
272 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
273 | { | |
274 | int rv; | |
275 | struct list_head *entry = NULL; | |
276 | #ifdef DEBUG_TIMING | |
277 | struct timeval t; | |
278 | #endif | |
279 | ||
280 | /* No need to save flags, we aleady have interrupts off and we | |
281 | already hold the SMI lock. */ | |
282 | spin_lock(&(smi_info->msg_lock)); | |
283 | ||
284 | /* Pick the high priority queue first. */ | |
b0defcdb | 285 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 286 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 287 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
288 | entry = smi_info->xmit_msgs.next; |
289 | } | |
290 | ||
b0defcdb | 291 | if (!entry) { |
1da177e4 LT |
292 | smi_info->curr_msg = NULL; |
293 | rv = SI_SM_IDLE; | |
294 | } else { | |
295 | int err; | |
296 | ||
297 | list_del(entry); | |
298 | smi_info->curr_msg = list_entry(entry, | |
299 | struct ipmi_smi_msg, | |
300 | link); | |
301 | #ifdef DEBUG_TIMING | |
302 | do_gettimeofday(&t); | |
303 | printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
304 | #endif | |
e041c683 AS |
305 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
306 | 0, smi_info); | |
ea94027b CM |
307 | if (err & NOTIFY_STOP_MASK) { |
308 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
309 | goto out; | |
310 | } | |
1da177e4 LT |
311 | err = smi_info->handlers->start_transaction( |
312 | smi_info->si_sm, | |
313 | smi_info->curr_msg->data, | |
314 | smi_info->curr_msg->data_size); | |
315 | if (err) { | |
316 | return_hosed_msg(smi_info); | |
317 | } | |
318 | ||
319 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
320 | } | |
ea94027b | 321 | out: |
1da177e4 LT |
322 | spin_unlock(&(smi_info->msg_lock)); |
323 | ||
324 | return rv; | |
325 | } | |
326 | ||
327 | static void start_enable_irq(struct smi_info *smi_info) | |
328 | { | |
329 | unsigned char msg[2]; | |
330 | ||
331 | /* If we are enabling interrupts, we have to tell the | |
332 | BMC to use them. */ | |
333 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
334 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
335 | ||
336 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
337 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
338 | } | |
339 | ||
340 | static void start_clear_flags(struct smi_info *smi_info) | |
341 | { | |
342 | unsigned char msg[3]; | |
343 | ||
344 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
345 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
346 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
347 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
348 | ||
349 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
350 | smi_info->si_state = SI_CLEARING_FLAGS; | |
351 | } | |
352 | ||
353 | /* When we have a situtaion where we run out of memory and cannot | |
354 | allocate messages, we just leave them in the BMC and run the system | |
355 | polled until we can allocate some memory. Once we have some | |
356 | memory, we will re-enable the interrupt. */ | |
357 | static inline void disable_si_irq(struct smi_info *smi_info) | |
358 | { | |
b0defcdb | 359 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
360 | disable_irq_nosync(smi_info->irq); |
361 | smi_info->interrupt_disabled = 1; | |
362 | } | |
363 | } | |
364 | ||
365 | static inline void enable_si_irq(struct smi_info *smi_info) | |
366 | { | |
367 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
368 | enable_irq(smi_info->irq); | |
369 | smi_info->interrupt_disabled = 0; | |
370 | } | |
371 | } | |
372 | ||
373 | static void handle_flags(struct smi_info *smi_info) | |
374 | { | |
3ae0e0f9 | 375 | retry: |
1da177e4 LT |
376 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
377 | /* Watchdog pre-timeout */ | |
378 | spin_lock(&smi_info->count_lock); | |
379 | smi_info->watchdog_pretimeouts++; | |
380 | spin_unlock(&smi_info->count_lock); | |
381 | ||
382 | start_clear_flags(smi_info); | |
383 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
384 | spin_unlock(&(smi_info->si_lock)); | |
385 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
386 | spin_lock(&(smi_info->si_lock)); | |
387 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
388 | /* Messages available. */ | |
389 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 390 | if (!smi_info->curr_msg) { |
1da177e4 LT |
391 | disable_si_irq(smi_info); |
392 | smi_info->si_state = SI_NORMAL; | |
393 | return; | |
394 | } | |
395 | enable_si_irq(smi_info); | |
396 | ||
397 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
398 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
399 | smi_info->curr_msg->data_size = 2; | |
400 | ||
401 | smi_info->handlers->start_transaction( | |
402 | smi_info->si_sm, | |
403 | smi_info->curr_msg->data, | |
404 | smi_info->curr_msg->data_size); | |
405 | smi_info->si_state = SI_GETTING_MESSAGES; | |
406 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
407 | /* Events available. */ | |
408 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 409 | if (!smi_info->curr_msg) { |
1da177e4 LT |
410 | disable_si_irq(smi_info); |
411 | smi_info->si_state = SI_NORMAL; | |
412 | return; | |
413 | } | |
414 | enable_si_irq(smi_info); | |
415 | ||
416 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
417 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
418 | smi_info->curr_msg->data_size = 2; | |
419 | ||
420 | smi_info->handlers->start_transaction( | |
421 | smi_info->si_sm, | |
422 | smi_info->curr_msg->data, | |
423 | smi_info->curr_msg->data_size); | |
424 | smi_info->si_state = SI_GETTING_EVENTS; | |
3ae0e0f9 CM |
425 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL) { |
426 | if (smi_info->oem_data_avail_handler) | |
427 | if (smi_info->oem_data_avail_handler(smi_info)) | |
428 | goto retry; | |
1da177e4 LT |
429 | } else { |
430 | smi_info->si_state = SI_NORMAL; | |
431 | } | |
432 | } | |
433 | ||
434 | static void handle_transaction_done(struct smi_info *smi_info) | |
435 | { | |
436 | struct ipmi_smi_msg *msg; | |
437 | #ifdef DEBUG_TIMING | |
438 | struct timeval t; | |
439 | ||
440 | do_gettimeofday(&t); | |
441 | printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
442 | #endif | |
443 | switch (smi_info->si_state) { | |
444 | case SI_NORMAL: | |
b0defcdb | 445 | if (!smi_info->curr_msg) |
1da177e4 LT |
446 | break; |
447 | ||
448 | smi_info->curr_msg->rsp_size | |
449 | = smi_info->handlers->get_result( | |
450 | smi_info->si_sm, | |
451 | smi_info->curr_msg->rsp, | |
452 | IPMI_MAX_MSG_LENGTH); | |
453 | ||
454 | /* Do this here becase deliver_recv_msg() releases the | |
455 | lock, and a new message can be put in during the | |
456 | time the lock is released. */ | |
457 | msg = smi_info->curr_msg; | |
458 | smi_info->curr_msg = NULL; | |
459 | deliver_recv_msg(smi_info, msg); | |
460 | break; | |
461 | ||
462 | case SI_GETTING_FLAGS: | |
463 | { | |
464 | unsigned char msg[4]; | |
465 | unsigned int len; | |
466 | ||
467 | /* We got the flags from the SMI, now handle them. */ | |
468 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
469 | if (msg[2] != 0) { | |
470 | /* Error fetching flags, just give up for | |
471 | now. */ | |
472 | smi_info->si_state = SI_NORMAL; | |
473 | } else if (len < 4) { | |
474 | /* Hmm, no flags. That's technically illegal, but | |
475 | don't use uninitialized data. */ | |
476 | smi_info->si_state = SI_NORMAL; | |
477 | } else { | |
478 | smi_info->msg_flags = msg[3]; | |
479 | handle_flags(smi_info); | |
480 | } | |
481 | break; | |
482 | } | |
483 | ||
484 | case SI_CLEARING_FLAGS: | |
485 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
486 | { | |
487 | unsigned char msg[3]; | |
488 | ||
489 | /* We cleared the flags. */ | |
490 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
491 | if (msg[2] != 0) { | |
492 | /* Error clearing flags */ | |
493 | printk(KERN_WARNING | |
494 | "ipmi_si: Error clearing flags: %2.2x\n", | |
495 | msg[2]); | |
496 | } | |
497 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
498 | start_enable_irq(smi_info); | |
499 | else | |
500 | smi_info->si_state = SI_NORMAL; | |
501 | break; | |
502 | } | |
503 | ||
504 | case SI_GETTING_EVENTS: | |
505 | { | |
506 | smi_info->curr_msg->rsp_size | |
507 | = smi_info->handlers->get_result( | |
508 | smi_info->si_sm, | |
509 | smi_info->curr_msg->rsp, | |
510 | IPMI_MAX_MSG_LENGTH); | |
511 | ||
512 | /* Do this here becase deliver_recv_msg() releases the | |
513 | lock, and a new message can be put in during the | |
514 | time the lock is released. */ | |
515 | msg = smi_info->curr_msg; | |
516 | smi_info->curr_msg = NULL; | |
517 | if (msg->rsp[2] != 0) { | |
518 | /* Error getting event, probably done. */ | |
519 | msg->done(msg); | |
520 | ||
521 | /* Take off the event flag. */ | |
522 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
523 | handle_flags(smi_info); | |
524 | } else { | |
525 | spin_lock(&smi_info->count_lock); | |
526 | smi_info->events++; | |
527 | spin_unlock(&smi_info->count_lock); | |
528 | ||
529 | /* Do this before we deliver the message | |
530 | because delivering the message releases the | |
531 | lock and something else can mess with the | |
532 | state. */ | |
533 | handle_flags(smi_info); | |
534 | ||
535 | deliver_recv_msg(smi_info, msg); | |
536 | } | |
537 | break; | |
538 | } | |
539 | ||
540 | case SI_GETTING_MESSAGES: | |
541 | { | |
542 | smi_info->curr_msg->rsp_size | |
543 | = smi_info->handlers->get_result( | |
544 | smi_info->si_sm, | |
545 | smi_info->curr_msg->rsp, | |
546 | IPMI_MAX_MSG_LENGTH); | |
547 | ||
548 | /* Do this here becase deliver_recv_msg() releases the | |
549 | lock, and a new message can be put in during the | |
550 | time the lock is released. */ | |
551 | msg = smi_info->curr_msg; | |
552 | smi_info->curr_msg = NULL; | |
553 | if (msg->rsp[2] != 0) { | |
554 | /* Error getting event, probably done. */ | |
555 | msg->done(msg); | |
556 | ||
557 | /* Take off the msg flag. */ | |
558 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
559 | handle_flags(smi_info); | |
560 | } else { | |
561 | spin_lock(&smi_info->count_lock); | |
562 | smi_info->incoming_messages++; | |
563 | spin_unlock(&smi_info->count_lock); | |
564 | ||
565 | /* Do this before we deliver the message | |
566 | because delivering the message releases the | |
567 | lock and something else can mess with the | |
568 | state. */ | |
569 | handle_flags(smi_info); | |
570 | ||
571 | deliver_recv_msg(smi_info, msg); | |
572 | } | |
573 | break; | |
574 | } | |
575 | ||
576 | case SI_ENABLE_INTERRUPTS1: | |
577 | { | |
578 | unsigned char msg[4]; | |
579 | ||
580 | /* We got the flags from the SMI, now handle them. */ | |
581 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
582 | if (msg[2] != 0) { | |
583 | printk(KERN_WARNING | |
584 | "ipmi_si: Could not enable interrupts" | |
585 | ", failed get, using polled mode.\n"); | |
586 | smi_info->si_state = SI_NORMAL; | |
587 | } else { | |
588 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
589 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
590 | msg[2] = msg[3] | 1; /* enable msg queue int */ | |
591 | smi_info->handlers->start_transaction( | |
592 | smi_info->si_sm, msg, 3); | |
593 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
594 | } | |
595 | break; | |
596 | } | |
597 | ||
598 | case SI_ENABLE_INTERRUPTS2: | |
599 | { | |
600 | unsigned char msg[4]; | |
601 | ||
602 | /* We got the flags from the SMI, now handle them. */ | |
603 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
604 | if (msg[2] != 0) { | |
605 | printk(KERN_WARNING | |
606 | "ipmi_si: Could not enable interrupts" | |
607 | ", failed set, using polled mode.\n"); | |
608 | } | |
609 | smi_info->si_state = SI_NORMAL; | |
610 | break; | |
611 | } | |
612 | } | |
613 | } | |
614 | ||
615 | /* Called on timeouts and events. Timeouts should pass the elapsed | |
616 | time, interrupts should pass in zero. */ | |
617 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, | |
618 | int time) | |
619 | { | |
620 | enum si_sm_result si_sm_result; | |
621 | ||
622 | restart: | |
623 | /* There used to be a loop here that waited a little while | |
624 | (around 25us) before giving up. That turned out to be | |
625 | pointless, the minimum delays I was seeing were in the 300us | |
626 | range, which is far too long to wait in an interrupt. So | |
627 | we just run until the state machine tells us something | |
628 | happened or it needs a delay. */ | |
629 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); | |
630 | time = 0; | |
631 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
632 | { | |
633 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
634 | } | |
635 | ||
636 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) | |
637 | { | |
638 | spin_lock(&smi_info->count_lock); | |
639 | smi_info->complete_transactions++; | |
640 | spin_unlock(&smi_info->count_lock); | |
641 | ||
642 | handle_transaction_done(smi_info); | |
643 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
644 | } | |
645 | else if (si_sm_result == SI_SM_HOSED) | |
646 | { | |
647 | spin_lock(&smi_info->count_lock); | |
648 | smi_info->hosed_count++; | |
649 | spin_unlock(&smi_info->count_lock); | |
650 | ||
651 | /* Do the before return_hosed_msg, because that | |
652 | releases the lock. */ | |
653 | smi_info->si_state = SI_NORMAL; | |
654 | if (smi_info->curr_msg != NULL) { | |
655 | /* If we were handling a user message, format | |
656 | a response to send to the upper layer to | |
657 | tell it about the error. */ | |
658 | return_hosed_msg(smi_info); | |
659 | } | |
660 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
661 | } | |
662 | ||
663 | /* We prefer handling attn over new messages. */ | |
664 | if (si_sm_result == SI_SM_ATTN) | |
665 | { | |
666 | unsigned char msg[2]; | |
667 | ||
668 | spin_lock(&smi_info->count_lock); | |
669 | smi_info->attentions++; | |
670 | spin_unlock(&smi_info->count_lock); | |
671 | ||
672 | /* Got a attn, send down a get message flags to see | |
673 | what's causing it. It would be better to handle | |
674 | this in the upper layer, but due to the way | |
675 | interrupts work with the SMI, that's not really | |
676 | possible. */ | |
677 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
678 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
679 | ||
680 | smi_info->handlers->start_transaction( | |
681 | smi_info->si_sm, msg, 2); | |
682 | smi_info->si_state = SI_GETTING_FLAGS; | |
683 | goto restart; | |
684 | } | |
685 | ||
686 | /* If we are currently idle, try to start the next message. */ | |
687 | if (si_sm_result == SI_SM_IDLE) { | |
688 | spin_lock(&smi_info->count_lock); | |
689 | smi_info->idles++; | |
690 | spin_unlock(&smi_info->count_lock); | |
691 | ||
692 | si_sm_result = start_next_msg(smi_info); | |
693 | if (si_sm_result != SI_SM_IDLE) | |
694 | goto restart; | |
695 | } | |
696 | ||
697 | if ((si_sm_result == SI_SM_IDLE) | |
698 | && (atomic_read(&smi_info->req_events))) | |
699 | { | |
700 | /* We are idle and the upper layer requested that I fetch | |
701 | events, so do so. */ | |
702 | unsigned char msg[2]; | |
703 | ||
704 | spin_lock(&smi_info->count_lock); | |
705 | smi_info->flag_fetches++; | |
706 | spin_unlock(&smi_info->count_lock); | |
707 | ||
708 | atomic_set(&smi_info->req_events, 0); | |
709 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
710 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
711 | ||
712 | smi_info->handlers->start_transaction( | |
713 | smi_info->si_sm, msg, 2); | |
714 | smi_info->si_state = SI_GETTING_FLAGS; | |
715 | goto restart; | |
716 | } | |
717 | ||
718 | return si_sm_result; | |
719 | } | |
720 | ||
721 | static void sender(void *send_info, | |
722 | struct ipmi_smi_msg *msg, | |
723 | int priority) | |
724 | { | |
725 | struct smi_info *smi_info = send_info; | |
726 | enum si_sm_result result; | |
727 | unsigned long flags; | |
728 | #ifdef DEBUG_TIMING | |
729 | struct timeval t; | |
730 | #endif | |
731 | ||
732 | spin_lock_irqsave(&(smi_info->msg_lock), flags); | |
733 | #ifdef DEBUG_TIMING | |
734 | do_gettimeofday(&t); | |
735 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
736 | #endif | |
737 | ||
738 | if (smi_info->run_to_completion) { | |
739 | /* If we are running to completion, then throw it in | |
740 | the list and run transactions until everything is | |
741 | clear. Priority doesn't matter here. */ | |
742 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
743 | ||
744 | /* We have to release the msg lock and claim the smi | |
745 | lock in this case, because of race conditions. */ | |
746 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
747 | ||
748 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
749 | result = smi_event_handler(smi_info, 0); | |
750 | while (result != SI_SM_IDLE) { | |
751 | udelay(SI_SHORT_TIMEOUT_USEC); | |
752 | result = smi_event_handler(smi_info, | |
753 | SI_SHORT_TIMEOUT_USEC); | |
754 | } | |
755 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
756 | return; | |
757 | } else { | |
758 | if (priority > 0) { | |
759 | list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs)); | |
760 | } else { | |
761 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
762 | } | |
763 | } | |
764 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
765 | ||
766 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
767 | if ((smi_info->si_state == SI_NORMAL) | |
768 | && (smi_info->curr_msg == NULL)) | |
769 | { | |
770 | start_next_msg(smi_info); | |
771 | si_restart_short_timer(smi_info); | |
772 | } | |
773 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
774 | } | |
775 | ||
776 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
777 | { | |
778 | struct smi_info *smi_info = send_info; | |
779 | enum si_sm_result result; | |
780 | unsigned long flags; | |
781 | ||
782 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
783 | ||
784 | smi_info->run_to_completion = i_run_to_completion; | |
785 | if (i_run_to_completion) { | |
786 | result = smi_event_handler(smi_info, 0); | |
787 | while (result != SI_SM_IDLE) { | |
788 | udelay(SI_SHORT_TIMEOUT_USEC); | |
789 | result = smi_event_handler(smi_info, | |
790 | SI_SHORT_TIMEOUT_USEC); | |
791 | } | |
792 | } | |
793 | ||
794 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
795 | } | |
796 | ||
a9a2c44f CM |
797 | static int ipmi_thread(void *data) |
798 | { | |
799 | struct smi_info *smi_info = data; | |
e9a705a0 | 800 | unsigned long flags; |
a9a2c44f CM |
801 | enum si_sm_result smi_result; |
802 | ||
a9a2c44f | 803 | set_user_nice(current, 19); |
e9a705a0 | 804 | while (!kthread_should_stop()) { |
a9a2c44f | 805 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 806 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 807 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
e9a705a0 MD |
808 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
809 | /* do nothing */ | |
a9a2c44f | 810 | } |
e9a705a0 MD |
811 | else if (smi_result == SI_SM_CALL_WITH_DELAY) |
812 | udelay(1); | |
813 | else | |
814 | schedule_timeout_interruptible(1); | |
a9a2c44f | 815 | } |
a9a2c44f CM |
816 | return 0; |
817 | } | |
818 | ||
819 | ||
1da177e4 LT |
820 | static void poll(void *send_info) |
821 | { | |
822 | struct smi_info *smi_info = send_info; | |
823 | ||
824 | smi_event_handler(smi_info, 0); | |
825 | } | |
826 | ||
827 | static void request_events(void *send_info) | |
828 | { | |
829 | struct smi_info *smi_info = send_info; | |
830 | ||
831 | atomic_set(&smi_info->req_events, 1); | |
832 | } | |
833 | ||
834 | static int initialized = 0; | |
835 | ||
836 | /* Must be called with interrupts off and with the si_lock held. */ | |
837 | static void si_restart_short_timer(struct smi_info *smi_info) | |
838 | { | |
839 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
840 | unsigned long flags; | |
841 | unsigned long jiffies_now; | |
75b0768a | 842 | unsigned long seq; |
1da177e4 LT |
843 | |
844 | if (del_timer(&(smi_info->si_timer))) { | |
845 | /* If we don't delete the timer, then it will go off | |
846 | immediately, anyway. So we only process if we | |
847 | actually delete the timer. */ | |
848 | ||
75b0768a CM |
849 | do { |
850 | seq = read_seqbegin_irqsave(&xtime_lock, flags); | |
851 | jiffies_now = jiffies; | |
852 | smi_info->si_timer.expires = jiffies_now; | |
853 | smi_info->si_timer.arch_cycle_expires | |
854 | = get_arch_cycles(jiffies_now); | |
855 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | |
1da177e4 LT |
856 | |
857 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); | |
858 | ||
859 | add_timer(&(smi_info->si_timer)); | |
860 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
861 | smi_info->timeout_restarts++; | |
862 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
863 | } | |
864 | #endif | |
865 | } | |
866 | ||
867 | static void smi_timeout(unsigned long data) | |
868 | { | |
869 | struct smi_info *smi_info = (struct smi_info *) data; | |
870 | enum si_sm_result smi_result; | |
871 | unsigned long flags; | |
872 | unsigned long jiffies_now; | |
c4edff1c | 873 | long time_diff; |
1da177e4 LT |
874 | #ifdef DEBUG_TIMING |
875 | struct timeval t; | |
876 | #endif | |
877 | ||
a9a2c44f | 878 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 | 879 | return; |
1da177e4 LT |
880 | |
881 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
882 | #ifdef DEBUG_TIMING | |
883 | do_gettimeofday(&t); | |
884 | printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
885 | #endif | |
886 | jiffies_now = jiffies; | |
c4edff1c | 887 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
888 | * SI_USEC_PER_JIFFY); |
889 | smi_result = smi_event_handler(smi_info, time_diff); | |
890 | ||
891 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
892 | ||
893 | smi_info->last_timeout_jiffies = jiffies_now; | |
894 | ||
b0defcdb | 895 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
896 | /* Running with interrupts, only do long timeouts. */ |
897 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
898 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
899 | smi_info->long_timeouts++; | |
900 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
901 | goto do_add_timer; | |
902 | } | |
903 | ||
904 | /* If the state machine asks for a short delay, then shorten | |
905 | the timer timeout. */ | |
906 | if (smi_result == SI_SM_CALL_WITH_DELAY) { | |
75b0768a CM |
907 | #if defined(CONFIG_HIGH_RES_TIMERS) |
908 | unsigned long seq; | |
909 | #endif | |
1da177e4 LT |
910 | spin_lock_irqsave(&smi_info->count_lock, flags); |
911 | smi_info->short_timeouts++; | |
912 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
913 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
75b0768a CM |
914 | do { |
915 | seq = read_seqbegin_irqsave(&xtime_lock, flags); | |
916 | smi_info->si_timer.expires = jiffies; | |
917 | smi_info->si_timer.arch_cycle_expires | |
918 | = get_arch_cycles(smi_info->si_timer.expires); | |
919 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | |
1da177e4 LT |
920 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); |
921 | #else | |
922 | smi_info->si_timer.expires = jiffies + 1; | |
923 | #endif | |
924 | } else { | |
925 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
926 | smi_info->long_timeouts++; | |
927 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
928 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
929 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
75b0768a | 930 | smi_info->si_timer.arch_cycle_expires = 0; |
1da177e4 LT |
931 | #endif |
932 | } | |
933 | ||
934 | do_add_timer: | |
935 | add_timer(&(smi_info->si_timer)); | |
936 | } | |
937 | ||
938 | static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs) | |
939 | { | |
940 | struct smi_info *smi_info = data; | |
941 | unsigned long flags; | |
942 | #ifdef DEBUG_TIMING | |
943 | struct timeval t; | |
944 | #endif | |
945 | ||
946 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
947 | ||
948 | spin_lock(&smi_info->count_lock); | |
949 | smi_info->interrupts++; | |
950 | spin_unlock(&smi_info->count_lock); | |
951 | ||
a9a2c44f | 952 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
953 | goto out; |
954 | ||
955 | #ifdef DEBUG_TIMING | |
956 | do_gettimeofday(&t); | |
957 | printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
958 | #endif | |
959 | smi_event_handler(smi_info, 0); | |
960 | out: | |
961 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
962 | return IRQ_HANDLED; | |
963 | } | |
964 | ||
9dbf68f9 CM |
965 | static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs) |
966 | { | |
967 | struct smi_info *smi_info = data; | |
968 | /* We need to clear the IRQ flag for the BT interface. */ | |
969 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
970 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
971 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
972 | return si_irq_handler(irq, data, regs); | |
973 | } | |
974 | ||
453823ba CM |
975 | static int smi_start_processing(void *send_info, |
976 | ipmi_smi_t intf) | |
977 | { | |
978 | struct smi_info *new_smi = send_info; | |
979 | ||
980 | new_smi->intf = intf; | |
981 | ||
982 | /* Set up the timer that drives the interface. */ | |
983 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
984 | new_smi->last_timeout_jiffies = jiffies; | |
985 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
986 | ||
987 | if (new_smi->si_type != SI_BT) { | |
988 | new_smi->thread = kthread_run(ipmi_thread, new_smi, | |
989 | "kipmi%d", new_smi->intf_num); | |
990 | if (IS_ERR(new_smi->thread)) { | |
991 | printk(KERN_NOTICE "ipmi_si_intf: Could not start" | |
992 | " kernel thread due to error %ld, only using" | |
993 | " timers to drive the interface\n", | |
994 | PTR_ERR(new_smi->thread)); | |
995 | new_smi->thread = NULL; | |
996 | } | |
997 | } | |
998 | ||
999 | return 0; | |
1000 | } | |
9dbf68f9 | 1001 | |
1da177e4 LT |
1002 | static struct ipmi_smi_handlers handlers = |
1003 | { | |
1004 | .owner = THIS_MODULE, | |
453823ba | 1005 | .start_processing = smi_start_processing, |
1da177e4 LT |
1006 | .sender = sender, |
1007 | .request_events = request_events, | |
1008 | .set_run_to_completion = set_run_to_completion, | |
1009 | .poll = poll, | |
1010 | }; | |
1011 | ||
1012 | /* There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1013 | a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */ | |
1014 | ||
1015 | #define SI_MAX_PARMS 4 | |
b0defcdb | 1016 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1017 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1018 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1019 | |
1da177e4 LT |
1020 | #define DEFAULT_REGSPACING 1 |
1021 | ||
1022 | static int si_trydefaults = 1; | |
1023 | static char *si_type[SI_MAX_PARMS]; | |
1024 | #define MAX_SI_TYPE_STR 30 | |
1025 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1026 | static unsigned long addrs[SI_MAX_PARMS]; | |
1027 | static int num_addrs; | |
1028 | static unsigned int ports[SI_MAX_PARMS]; | |
1029 | static int num_ports; | |
1030 | static int irqs[SI_MAX_PARMS]; | |
1031 | static int num_irqs; | |
1032 | static int regspacings[SI_MAX_PARMS]; | |
1033 | static int num_regspacings = 0; | |
1034 | static int regsizes[SI_MAX_PARMS]; | |
1035 | static int num_regsizes = 0; | |
1036 | static int regshifts[SI_MAX_PARMS]; | |
1037 | static int num_regshifts = 0; | |
1038 | static int slave_addrs[SI_MAX_PARMS]; | |
1039 | static int num_slave_addrs = 0; | |
1040 | ||
1041 | ||
1042 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1043 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1044 | " default scan of the KCS and SMIC interface at the standard" | |
1045 | " address"); | |
1046 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1047 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1048 | " interface separated by commas. The types are 'kcs'," | |
1049 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1050 | " the first interface to kcs and the second to bt"); | |
1051 | module_param_array(addrs, long, &num_addrs, 0); | |
1052 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" | |
1053 | " addresses separated by commas. Only use if an interface" | |
1054 | " is in memory. Otherwise, set it to zero or leave" | |
1055 | " it blank."); | |
1056 | module_param_array(ports, int, &num_ports, 0); | |
1057 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" | |
1058 | " addresses separated by commas. Only use if an interface" | |
1059 | " is a port. Otherwise, set it to zero or leave" | |
1060 | " it blank."); | |
1061 | module_param_array(irqs, int, &num_irqs, 0); | |
1062 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1063 | " addresses separated by commas. Only use if an interface" | |
1064 | " has an interrupt. Otherwise, set it to zero or leave" | |
1065 | " it blank."); | |
1066 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1067 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1068 | " and each successive register used by the interface. For" | |
1069 | " instance, if the start address is 0xca2 and the spacing" | |
1070 | " is 2, then the second address is at 0xca4. Defaults" | |
1071 | " to 1."); | |
1072 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1073 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1074 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1075 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1076 | " the 8-bit IPMI register has to be read from a larger" | |
1077 | " register."); | |
1078 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1079 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1080 | " IPMI register, in bits. For instance, if the data" | |
1081 | " is read from a 32-bit word and the IPMI data is in" | |
1082 | " bit 8-15, then the shift would be 8"); | |
1083 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1084 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1085 | " the controller. Normally this is 0x20, but can be" | |
1086 | " overridden by this parm. This is an array indexed" | |
1087 | " by interface number."); | |
1088 | ||
1089 | ||
b0defcdb | 1090 | #define IPMI_IO_ADDR_SPACE 0 |
1da177e4 | 1091 | #define IPMI_MEM_ADDR_SPACE 1 |
b0defcdb | 1092 | static char *addr_space_to_str[] = { "I/O", "memory" }; |
1da177e4 | 1093 | |
b0defcdb | 1094 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1095 | { |
b0defcdb CM |
1096 | if (info->si_type == SI_BT) |
1097 | /* Disable the interrupt in the BT interface. */ | |
1098 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1099 | free_irq(info->irq, info); | |
1da177e4 | 1100 | } |
1da177e4 LT |
1101 | |
1102 | static int std_irq_setup(struct smi_info *info) | |
1103 | { | |
1104 | int rv; | |
1105 | ||
b0defcdb | 1106 | if (!info->irq) |
1da177e4 LT |
1107 | return 0; |
1108 | ||
9dbf68f9 CM |
1109 | if (info->si_type == SI_BT) { |
1110 | rv = request_irq(info->irq, | |
1111 | si_bt_irq_handler, | |
1112 | SA_INTERRUPT, | |
1113 | DEVICE_NAME, | |
1114 | info); | |
b0defcdb | 1115 | if (!rv) |
9dbf68f9 CM |
1116 | /* Enable the interrupt in the BT interface. */ |
1117 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1118 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1119 | } else | |
1120 | rv = request_irq(info->irq, | |
1121 | si_irq_handler, | |
1122 | SA_INTERRUPT, | |
1123 | DEVICE_NAME, | |
1124 | info); | |
1da177e4 LT |
1125 | if (rv) { |
1126 | printk(KERN_WARNING | |
1127 | "ipmi_si: %s unable to claim interrupt %d," | |
1128 | " running polled\n", | |
1129 | DEVICE_NAME, info->irq); | |
1130 | info->irq = 0; | |
1131 | } else { | |
b0defcdb | 1132 | info->irq_cleanup = std_irq_cleanup; |
1da177e4 LT |
1133 | printk(" Using irq %d\n", info->irq); |
1134 | } | |
1135 | ||
1136 | return rv; | |
1137 | } | |
1138 | ||
1da177e4 LT |
1139 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1140 | { | |
b0defcdb | 1141 | unsigned int addr = io->addr_data; |
1da177e4 | 1142 | |
b0defcdb | 1143 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1144 | } |
1145 | ||
1146 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1147 | unsigned char b) | |
1148 | { | |
b0defcdb | 1149 | unsigned int addr = io->addr_data; |
1da177e4 | 1150 | |
b0defcdb | 1151 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1152 | } |
1153 | ||
1154 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1155 | { | |
b0defcdb | 1156 | unsigned int addr = io->addr_data; |
1da177e4 | 1157 | |
b0defcdb | 1158 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1162 | unsigned char b) | |
1163 | { | |
b0defcdb | 1164 | unsigned int addr = io->addr_data; |
1da177e4 | 1165 | |
b0defcdb | 1166 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1170 | { | |
b0defcdb | 1171 | unsigned int addr = io->addr_data; |
1da177e4 | 1172 | |
b0defcdb | 1173 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1174 | } |
1175 | ||
1176 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1177 | unsigned char b) | |
1178 | { | |
b0defcdb | 1179 | unsigned int addr = io->addr_data; |
1da177e4 | 1180 | |
b0defcdb | 1181 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | static void port_cleanup(struct smi_info *info) | |
1185 | { | |
b0defcdb | 1186 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1187 | int idx; |
1da177e4 | 1188 | |
b0defcdb | 1189 | if (addr) { |
d61a3ead CM |
1190 | for (idx = 0; idx < info->io_size; idx++) { |
1191 | release_region(addr + idx * info->io.regspacing, | |
1192 | info->io.regsize); | |
1193 | } | |
1da177e4 | 1194 | } |
1da177e4 LT |
1195 | } |
1196 | ||
1197 | static int port_setup(struct smi_info *info) | |
1198 | { | |
b0defcdb | 1199 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1200 | int idx; |
1da177e4 | 1201 | |
b0defcdb | 1202 | if (!addr) |
1da177e4 LT |
1203 | return -ENODEV; |
1204 | ||
1205 | info->io_cleanup = port_cleanup; | |
1206 | ||
1207 | /* Figure out the actual inb/inw/inl/etc routine to use based | |
1208 | upon the register size. */ | |
1209 | switch (info->io.regsize) { | |
1210 | case 1: | |
1211 | info->io.inputb = port_inb; | |
1212 | info->io.outputb = port_outb; | |
1213 | break; | |
1214 | case 2: | |
1215 | info->io.inputb = port_inw; | |
1216 | info->io.outputb = port_outw; | |
1217 | break; | |
1218 | case 4: | |
1219 | info->io.inputb = port_inl; | |
1220 | info->io.outputb = port_outl; | |
1221 | break; | |
1222 | default: | |
1223 | printk("ipmi_si: Invalid register size: %d\n", | |
1224 | info->io.regsize); | |
1225 | return -EINVAL; | |
1226 | } | |
1227 | ||
d61a3ead CM |
1228 | /* Some BIOSes reserve disjoint I/O regions in their ACPI |
1229 | * tables. This causes problems when trying to register the | |
1230 | * entire I/O region. Therefore we must register each I/O | |
1231 | * port separately. | |
1232 | */ | |
1233 | for (idx = 0; idx < info->io_size; idx++) { | |
1234 | if (request_region(addr + idx * info->io.regspacing, | |
1235 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1236 | /* Undo allocations */ | |
1237 | while (idx--) { | |
1238 | release_region(addr + idx * info->io.regspacing, | |
1239 | info->io.regsize); | |
1240 | } | |
1241 | return -EIO; | |
1242 | } | |
1243 | } | |
1da177e4 LT |
1244 | return 0; |
1245 | } | |
1246 | ||
546cfdf4 | 1247 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1248 | { |
1249 | return readb((io->addr)+(offset * io->regspacing)); | |
1250 | } | |
1251 | ||
546cfdf4 | 1252 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1253 | unsigned char b) |
1254 | { | |
1255 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1256 | } | |
1257 | ||
546cfdf4 | 1258 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1259 | { |
1260 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1261 | && 0xff; | |
1262 | } | |
1263 | ||
546cfdf4 | 1264 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1265 | unsigned char b) |
1266 | { | |
1267 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1268 | } | |
1269 | ||
546cfdf4 | 1270 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1271 | { |
1272 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1273 | && 0xff; | |
1274 | } | |
1275 | ||
546cfdf4 | 1276 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1277 | unsigned char b) |
1278 | { | |
1279 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1280 | } | |
1281 | ||
1282 | #ifdef readq | |
1283 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1284 | { | |
1285 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1286 | && 0xff; | |
1287 | } | |
1288 | ||
1289 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1290 | unsigned char b) | |
1291 | { | |
1292 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1293 | } | |
1294 | #endif | |
1295 | ||
1296 | static void mem_cleanup(struct smi_info *info) | |
1297 | { | |
b0defcdb | 1298 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1299 | int mapsize; |
1300 | ||
1301 | if (info->io.addr) { | |
1302 | iounmap(info->io.addr); | |
1303 | ||
1304 | mapsize = ((info->io_size * info->io.regspacing) | |
1305 | - (info->io.regspacing - info->io.regsize)); | |
1306 | ||
b0defcdb | 1307 | release_mem_region(addr, mapsize); |
1da177e4 | 1308 | } |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | static int mem_setup(struct smi_info *info) | |
1312 | { | |
b0defcdb | 1313 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1314 | int mapsize; |
1315 | ||
b0defcdb | 1316 | if (!addr) |
1da177e4 LT |
1317 | return -ENODEV; |
1318 | ||
1319 | info->io_cleanup = mem_cleanup; | |
1320 | ||
1321 | /* Figure out the actual readb/readw/readl/etc routine to use based | |
1322 | upon the register size. */ | |
1323 | switch (info->io.regsize) { | |
1324 | case 1: | |
546cfdf4 AD |
1325 | info->io.inputb = intf_mem_inb; |
1326 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1327 | break; |
1328 | case 2: | |
546cfdf4 AD |
1329 | info->io.inputb = intf_mem_inw; |
1330 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1331 | break; |
1332 | case 4: | |
546cfdf4 AD |
1333 | info->io.inputb = intf_mem_inl; |
1334 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1335 | break; |
1336 | #ifdef readq | |
1337 | case 8: | |
1338 | info->io.inputb = mem_inq; | |
1339 | info->io.outputb = mem_outq; | |
1340 | break; | |
1341 | #endif | |
1342 | default: | |
1343 | printk("ipmi_si: Invalid register size: %d\n", | |
1344 | info->io.regsize); | |
1345 | return -EINVAL; | |
1346 | } | |
1347 | ||
1348 | /* Calculate the total amount of memory to claim. This is an | |
1349 | * unusual looking calculation, but it avoids claiming any | |
1350 | * more memory than it has to. It will claim everything | |
1351 | * between the first address to the end of the last full | |
1352 | * register. */ | |
1353 | mapsize = ((info->io_size * info->io.regspacing) | |
1354 | - (info->io.regspacing - info->io.regsize)); | |
1355 | ||
b0defcdb | 1356 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1357 | return -EIO; |
1358 | ||
b0defcdb | 1359 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1360 | if (info->io.addr == NULL) { |
b0defcdb | 1361 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1362 | return -EIO; |
1363 | } | |
1364 | return 0; | |
1365 | } | |
1366 | ||
b0defcdb CM |
1367 | |
1368 | static __devinit void hardcode_find_bmc(void) | |
1da177e4 | 1369 | { |
b0defcdb | 1370 | int i; |
1da177e4 LT |
1371 | struct smi_info *info; |
1372 | ||
b0defcdb CM |
1373 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1374 | if (!ports[i] && !addrs[i]) | |
1375 | continue; | |
1da177e4 | 1376 | |
b0defcdb CM |
1377 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1378 | if (!info) | |
1379 | return; | |
1da177e4 | 1380 | |
b0defcdb | 1381 | info->addr_source = "hardcoded"; |
1da177e4 | 1382 | |
b0defcdb CM |
1383 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
1384 | info->si_type = SI_KCS; | |
1385 | } else if (strcmp(si_type[i], "smic") == 0) { | |
1386 | info->si_type = SI_SMIC; | |
1387 | } else if (strcmp(si_type[i], "bt") == 0) { | |
1388 | info->si_type = SI_BT; | |
1389 | } else { | |
1390 | printk(KERN_WARNING | |
1391 | "ipmi_si: Interface type specified " | |
1392 | "for interface %d, was invalid: %s\n", | |
1393 | i, si_type[i]); | |
1394 | kfree(info); | |
1395 | continue; | |
1396 | } | |
1da177e4 | 1397 | |
b0defcdb CM |
1398 | if (ports[i]) { |
1399 | /* An I/O port */ | |
1400 | info->io_setup = port_setup; | |
1401 | info->io.addr_data = ports[i]; | |
1402 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1403 | } else if (addrs[i]) { | |
1404 | /* A memory port */ | |
1405 | info->io_setup = mem_setup; | |
1406 | info->io.addr_data = addrs[i]; | |
1407 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1408 | } else { | |
1409 | printk(KERN_WARNING | |
1410 | "ipmi_si: Interface type specified " | |
1411 | "for interface %d, " | |
1412 | "but port and address were not set or " | |
1413 | "set to zero.\n", i); | |
1414 | kfree(info); | |
1415 | continue; | |
1416 | } | |
1da177e4 | 1417 | |
b0defcdb CM |
1418 | info->io.addr = NULL; |
1419 | info->io.regspacing = regspacings[i]; | |
1420 | if (!info->io.regspacing) | |
1421 | info->io.regspacing = DEFAULT_REGSPACING; | |
1422 | info->io.regsize = regsizes[i]; | |
1423 | if (!info->io.regsize) | |
1424 | info->io.regsize = DEFAULT_REGSPACING; | |
1425 | info->io.regshift = regshifts[i]; | |
1426 | info->irq = irqs[i]; | |
1427 | if (info->irq) | |
1428 | info->irq_setup = std_irq_setup; | |
1da177e4 | 1429 | |
b0defcdb CM |
1430 | try_smi_init(info); |
1431 | } | |
1432 | } | |
1da177e4 | 1433 | |
8466361a | 1434 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1435 | |
1436 | #include <linux/acpi.h> | |
1437 | ||
1438 | /* Once we get an ACPI failure, we don't try any more, because we go | |
1439 | through the tables sequentially. Once we don't find a table, there | |
1440 | are no more. */ | |
1441 | static int acpi_failure = 0; | |
1442 | ||
1443 | /* For GPE-type interrupts. */ | |
1444 | static u32 ipmi_acpi_gpe(void *context) | |
1445 | { | |
1446 | struct smi_info *smi_info = context; | |
1447 | unsigned long flags; | |
1448 | #ifdef DEBUG_TIMING | |
1449 | struct timeval t; | |
1450 | #endif | |
1451 | ||
1452 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1453 | ||
1454 | spin_lock(&smi_info->count_lock); | |
1455 | smi_info->interrupts++; | |
1456 | spin_unlock(&smi_info->count_lock); | |
1457 | ||
a9a2c44f | 1458 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
1459 | goto out; |
1460 | ||
1461 | #ifdef DEBUG_TIMING | |
1462 | do_gettimeofday(&t); | |
1463 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1464 | #endif | |
1465 | smi_event_handler(smi_info, 0); | |
1466 | out: | |
1467 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1468 | ||
1469 | return ACPI_INTERRUPT_HANDLED; | |
1470 | } | |
1471 | ||
b0defcdb CM |
1472 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1473 | { | |
1474 | if (!info->irq) | |
1475 | return; | |
1476 | ||
1477 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1478 | } | |
1479 | ||
1da177e4 LT |
1480 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1481 | { | |
1482 | acpi_status status; | |
1483 | ||
b0defcdb | 1484 | if (!info->irq) |
1da177e4 LT |
1485 | return 0; |
1486 | ||
1487 | /* FIXME - is level triggered right? */ | |
1488 | status = acpi_install_gpe_handler(NULL, | |
1489 | info->irq, | |
1490 | ACPI_GPE_LEVEL_TRIGGERED, | |
1491 | &ipmi_acpi_gpe, | |
1492 | info); | |
1493 | if (status != AE_OK) { | |
1494 | printk(KERN_WARNING | |
1495 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1496 | " running polled\n", | |
1497 | DEVICE_NAME, info->irq); | |
1498 | info->irq = 0; | |
1499 | return -EINVAL; | |
1500 | } else { | |
b0defcdb | 1501 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
1da177e4 LT |
1502 | printk(" Using ACPI GPE %d\n", info->irq); |
1503 | return 0; | |
1504 | } | |
1505 | } | |
1506 | ||
1da177e4 LT |
1507 | /* |
1508 | * Defined at | |
1509 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf | |
1510 | */ | |
1511 | struct SPMITable { | |
1512 | s8 Signature[4]; | |
1513 | u32 Length; | |
1514 | u8 Revision; | |
1515 | u8 Checksum; | |
1516 | s8 OEMID[6]; | |
1517 | s8 OEMTableID[8]; | |
1518 | s8 OEMRevision[4]; | |
1519 | s8 CreatorID[4]; | |
1520 | s8 CreatorRevision[4]; | |
1521 | u8 InterfaceType; | |
1522 | u8 IPMIlegacy; | |
1523 | s16 SpecificationRevision; | |
1524 | ||
1525 | /* | |
1526 | * Bit 0 - SCI interrupt supported | |
1527 | * Bit 1 - I/O APIC/SAPIC | |
1528 | */ | |
1529 | u8 InterruptType; | |
1530 | ||
1531 | /* If bit 0 of InterruptType is set, then this is the SCI | |
1532 | interrupt in the GPEx_STS register. */ | |
1533 | u8 GPE; | |
1534 | ||
1535 | s16 Reserved; | |
1536 | ||
1537 | /* If bit 1 of InterruptType is set, then this is the I/O | |
1538 | APIC/SAPIC interrupt. */ | |
1539 | u32 GlobalSystemInterrupt; | |
1540 | ||
1541 | /* The actual register address. */ | |
1542 | struct acpi_generic_address addr; | |
1543 | ||
1544 | u8 UID[4]; | |
1545 | ||
1546 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1547 | }; | |
1548 | ||
b0defcdb | 1549 | static __devinit int try_init_acpi(struct SPMITable *spmi) |
1da177e4 LT |
1550 | { |
1551 | struct smi_info *info; | |
1da177e4 LT |
1552 | char *io_type; |
1553 | u8 addr_space; | |
1554 | ||
1da177e4 LT |
1555 | if (spmi->IPMIlegacy != 1) { |
1556 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
1557 | return -ENODEV; | |
1558 | } | |
1559 | ||
1560 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
1561 | addr_space = IPMI_MEM_ADDR_SPACE; | |
1562 | else | |
1563 | addr_space = IPMI_IO_ADDR_SPACE; | |
b0defcdb CM |
1564 | |
1565 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1566 | if (!info) { | |
1567 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
1568 | return -ENOMEM; | |
1569 | } | |
1570 | ||
1571 | info->addr_source = "ACPI"; | |
1da177e4 | 1572 | |
1da177e4 LT |
1573 | /* Figure out the interface type. */ |
1574 | switch (spmi->InterfaceType) | |
1575 | { | |
1576 | case 1: /* KCS */ | |
b0defcdb | 1577 | info->si_type = SI_KCS; |
1da177e4 | 1578 | break; |
1da177e4 | 1579 | case 2: /* SMIC */ |
b0defcdb | 1580 | info->si_type = SI_SMIC; |
1da177e4 | 1581 | break; |
1da177e4 | 1582 | case 3: /* BT */ |
b0defcdb | 1583 | info->si_type = SI_BT; |
1da177e4 | 1584 | break; |
1da177e4 LT |
1585 | default: |
1586 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
1587 | spmi->InterfaceType); | |
b0defcdb | 1588 | kfree(info); |
1da177e4 LT |
1589 | return -EIO; |
1590 | } | |
1591 | ||
1da177e4 LT |
1592 | if (spmi->InterruptType & 1) { |
1593 | /* We've got a GPE interrupt. */ | |
1594 | info->irq = spmi->GPE; | |
1595 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
1596 | } else if (spmi->InterruptType & 2) { |
1597 | /* We've got an APIC/SAPIC interrupt. */ | |
1598 | info->irq = spmi->GlobalSystemInterrupt; | |
1599 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
1600 | } else { |
1601 | /* Use the default interrupt setting. */ | |
1602 | info->irq = 0; | |
1603 | info->irq_setup = NULL; | |
1604 | } | |
1605 | ||
35bc37a0 CM |
1606 | if (spmi->addr.register_bit_width) { |
1607 | /* A (hopefully) properly formed register bit width. */ | |
35bc37a0 CM |
1608 | info->io.regspacing = spmi->addr.register_bit_width / 8; |
1609 | } else { | |
35bc37a0 CM |
1610 | info->io.regspacing = DEFAULT_REGSPACING; |
1611 | } | |
b0defcdb CM |
1612 | info->io.regsize = info->io.regspacing; |
1613 | info->io.regshift = spmi->addr.register_bit_offset; | |
1da177e4 LT |
1614 | |
1615 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
1616 | io_type = "memory"; | |
1617 | info->io_setup = mem_setup; | |
b0defcdb | 1618 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
1619 | } else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1620 | io_type = "I/O"; | |
1621 | info->io_setup = port_setup; | |
b0defcdb | 1622 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
1da177e4 LT |
1623 | } else { |
1624 | kfree(info); | |
1625 | printk("ipmi_si: Unknown ACPI I/O Address type\n"); | |
1626 | return -EIO; | |
1627 | } | |
b0defcdb | 1628 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 1629 | |
b0defcdb | 1630 | try_smi_init(info); |
1da177e4 | 1631 | |
1da177e4 LT |
1632 | return 0; |
1633 | } | |
b0defcdb CM |
1634 | |
1635 | static __devinit void acpi_find_bmc(void) | |
1636 | { | |
1637 | acpi_status status; | |
1638 | struct SPMITable *spmi; | |
1639 | int i; | |
1640 | ||
1641 | if (acpi_disabled) | |
1642 | return; | |
1643 | ||
1644 | if (acpi_failure) | |
1645 | return; | |
1646 | ||
1647 | for (i = 0; ; i++) { | |
1648 | status = acpi_get_firmware_table("SPMI", i+1, | |
1649 | ACPI_LOGICAL_ADDRESSING, | |
1650 | (struct acpi_table_header **) | |
1651 | &spmi); | |
1652 | if (status != AE_OK) | |
1653 | return; | |
1654 | ||
1655 | try_init_acpi(spmi); | |
1656 | } | |
1657 | } | |
1da177e4 LT |
1658 | #endif |
1659 | ||
a9fad4cc | 1660 | #ifdef CONFIG_DMI |
b0defcdb | 1661 | struct dmi_ipmi_data |
1da177e4 LT |
1662 | { |
1663 | u8 type; | |
1664 | u8 addr_space; | |
1665 | unsigned long base_addr; | |
1666 | u8 irq; | |
1667 | u8 offset; | |
1668 | u8 slave_addr; | |
b0defcdb | 1669 | }; |
1da177e4 | 1670 | |
b0defcdb CM |
1671 | static int __devinit decode_dmi(struct dmi_header *dm, |
1672 | struct dmi_ipmi_data *dmi) | |
1da177e4 | 1673 | { |
e8b33617 | 1674 | u8 *data = (u8 *)dm; |
1da177e4 LT |
1675 | unsigned long base_addr; |
1676 | u8 reg_spacing; | |
b224cd3a | 1677 | u8 len = dm->length; |
1da177e4 | 1678 | |
b0defcdb | 1679 | dmi->type = data[4]; |
1da177e4 LT |
1680 | |
1681 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
1682 | if (len >= 0x11) { | |
1683 | if (base_addr & 1) { | |
1684 | /* I/O */ | |
1685 | base_addr &= 0xFFFE; | |
b0defcdb | 1686 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
1687 | } |
1688 | else { | |
1689 | /* Memory */ | |
b0defcdb | 1690 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
1da177e4 LT |
1691 | } |
1692 | /* If bit 4 of byte 0x10 is set, then the lsb for the address | |
1693 | is odd. */ | |
b0defcdb | 1694 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 1695 | |
b0defcdb | 1696 | dmi->irq = data[0x11]; |
1da177e4 LT |
1697 | |
1698 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 1699 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
1da177e4 LT |
1700 | switch(reg_spacing){ |
1701 | case 0x00: /* Byte boundaries */ | |
b0defcdb | 1702 | dmi->offset = 1; |
1da177e4 LT |
1703 | break; |
1704 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 1705 | dmi->offset = 4; |
1da177e4 LT |
1706 | break; |
1707 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 1708 | dmi->offset = 16; |
1da177e4 LT |
1709 | break; |
1710 | default: | |
1711 | /* Some other interface, just ignore it. */ | |
1712 | return -EIO; | |
1713 | } | |
1714 | } else { | |
1715 | /* Old DMI spec. */ | |
92068801 CM |
1716 | /* Note that technically, the lower bit of the base |
1717 | * address should be 1 if the address is I/O and 0 if | |
1718 | * the address is in memory. So many systems get that | |
1719 | * wrong (and all that I have seen are I/O) so we just | |
1720 | * ignore that bit and assume I/O. Systems that use | |
1721 | * memory should use the newer spec, anyway. */ | |
b0defcdb CM |
1722 | dmi->base_addr = base_addr & 0xfffe; |
1723 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
1724 | dmi->offset = 1; | |
1da177e4 LT |
1725 | } |
1726 | ||
b0defcdb | 1727 | dmi->slave_addr = data[6]; |
1da177e4 | 1728 | |
b0defcdb | 1729 | return 0; |
1da177e4 LT |
1730 | } |
1731 | ||
b0defcdb | 1732 | static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 1733 | { |
b0defcdb | 1734 | struct smi_info *info; |
1da177e4 | 1735 | |
b0defcdb CM |
1736 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1737 | if (!info) { | |
1738 | printk(KERN_ERR | |
1739 | "ipmi_si: Could not allocate SI data\n"); | |
1740 | return; | |
1da177e4 | 1741 | } |
1da177e4 | 1742 | |
b0defcdb | 1743 | info->addr_source = "SMBIOS"; |
1da177e4 | 1744 | |
e8b33617 | 1745 | switch (ipmi_data->type) { |
b0defcdb CM |
1746 | case 0x01: /* KCS */ |
1747 | info->si_type = SI_KCS; | |
1748 | break; | |
1749 | case 0x02: /* SMIC */ | |
1750 | info->si_type = SI_SMIC; | |
1751 | break; | |
1752 | case 0x03: /* BT */ | |
1753 | info->si_type = SI_BT; | |
1754 | break; | |
1755 | default: | |
1756 | return; | |
1da177e4 | 1757 | } |
1da177e4 | 1758 | |
b0defcdb CM |
1759 | switch (ipmi_data->addr_space) { |
1760 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 1761 | info->io_setup = mem_setup; |
b0defcdb CM |
1762 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
1763 | break; | |
1764 | ||
1765 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 1766 | info->io_setup = port_setup; |
b0defcdb CM |
1767 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1768 | break; | |
1769 | ||
1770 | default: | |
1da177e4 | 1771 | kfree(info); |
b0defcdb CM |
1772 | printk(KERN_WARNING |
1773 | "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", | |
1774 | ipmi_data->addr_space); | |
1775 | return; | |
1da177e4 | 1776 | } |
b0defcdb | 1777 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 1778 | |
b0defcdb CM |
1779 | info->io.regspacing = ipmi_data->offset; |
1780 | if (!info->io.regspacing) | |
1da177e4 LT |
1781 | info->io.regspacing = DEFAULT_REGSPACING; |
1782 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 1783 | info->io.regshift = 0; |
1da177e4 LT |
1784 | |
1785 | info->slave_addr = ipmi_data->slave_addr; | |
1786 | ||
b0defcdb CM |
1787 | info->irq = ipmi_data->irq; |
1788 | if (info->irq) | |
1789 | info->irq_setup = std_irq_setup; | |
1da177e4 | 1790 | |
b0defcdb CM |
1791 | try_smi_init(info); |
1792 | } | |
1da177e4 | 1793 | |
b0defcdb CM |
1794 | static void __devinit dmi_find_bmc(void) |
1795 | { | |
1796 | struct dmi_device *dev = NULL; | |
1797 | struct dmi_ipmi_data data; | |
1798 | int rv; | |
1799 | ||
1800 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
1801 | rv = decode_dmi((struct dmi_header *) dev->device_data, &data); | |
1802 | if (!rv) | |
1803 | try_init_dmi(&data); | |
1804 | } | |
1da177e4 | 1805 | } |
a9fad4cc | 1806 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
1807 | |
1808 | #ifdef CONFIG_PCI | |
1809 | ||
b0defcdb CM |
1810 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
1811 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
1812 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
1813 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
1814 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
1815 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
1816 | ||
1da177e4 LT |
1817 | #define PCI_HP_VENDOR_ID 0x103C |
1818 | #define PCI_MMC_DEVICE_ID 0x121A | |
1819 | #define PCI_MMC_ADDR_CW 0x10 | |
1820 | ||
b0defcdb CM |
1821 | static void ipmi_pci_cleanup(struct smi_info *info) |
1822 | { | |
1823 | struct pci_dev *pdev = info->addr_source_data; | |
1824 | ||
1825 | pci_disable_device(pdev); | |
1826 | } | |
1da177e4 | 1827 | |
b0defcdb CM |
1828 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
1829 | const struct pci_device_id *ent) | |
1da177e4 | 1830 | { |
b0defcdb CM |
1831 | int rv; |
1832 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
1833 | struct smi_info *info; | |
1834 | int first_reg_offset = 0; | |
1da177e4 | 1835 | |
b0defcdb CM |
1836 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1837 | if (!info) | |
1838 | return ENOMEM; | |
1da177e4 | 1839 | |
b0defcdb | 1840 | info->addr_source = "PCI"; |
1da177e4 | 1841 | |
b0defcdb CM |
1842 | switch (class_type) { |
1843 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
1844 | info->si_type = SI_SMIC; | |
1845 | break; | |
1da177e4 | 1846 | |
b0defcdb CM |
1847 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
1848 | info->si_type = SI_KCS; | |
1849 | break; | |
1850 | ||
1851 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
1852 | info->si_type = SI_BT; | |
1853 | break; | |
1854 | ||
1855 | default: | |
1856 | kfree(info); | |
1857 | printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", | |
1858 | pci_name(pdev), class_type); | |
1859 | return ENOMEM; | |
1da177e4 LT |
1860 | } |
1861 | ||
b0defcdb CM |
1862 | rv = pci_enable_device(pdev); |
1863 | if (rv) { | |
1864 | printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", | |
1865 | pci_name(pdev)); | |
1866 | kfree(info); | |
1867 | return rv; | |
1da177e4 LT |
1868 | } |
1869 | ||
b0defcdb CM |
1870 | info->addr_source_cleanup = ipmi_pci_cleanup; |
1871 | info->addr_source_data = pdev; | |
1da177e4 | 1872 | |
b0defcdb CM |
1873 | if (pdev->subsystem_vendor == PCI_HP_VENDOR_ID) |
1874 | first_reg_offset = 1; | |
1da177e4 | 1875 | |
b0defcdb CM |
1876 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
1877 | info->io_setup = port_setup; | |
1878 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1879 | } else { | |
1880 | info->io_setup = mem_setup; | |
1881 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 1882 | } |
b0defcdb | 1883 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 1884 | |
b0defcdb | 1885 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 1886 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 1887 | info->io.regshift = 0; |
1da177e4 | 1888 | |
b0defcdb CM |
1889 | info->irq = pdev->irq; |
1890 | if (info->irq) | |
1891 | info->irq_setup = std_irq_setup; | |
1da177e4 | 1892 | |
50c812b2 CM |
1893 | info->dev = &pdev->dev; |
1894 | ||
b0defcdb CM |
1895 | return try_smi_init(info); |
1896 | } | |
1da177e4 | 1897 | |
b0defcdb CM |
1898 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
1899 | { | |
1900 | } | |
1da177e4 | 1901 | |
b0defcdb CM |
1902 | #ifdef CONFIG_PM |
1903 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
1904 | { | |
1da177e4 LT |
1905 | return 0; |
1906 | } | |
1da177e4 | 1907 | |
b0defcdb | 1908 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 1909 | { |
b0defcdb CM |
1910 | return 0; |
1911 | } | |
1da177e4 | 1912 | #endif |
1da177e4 | 1913 | |
b0defcdb CM |
1914 | static struct pci_device_id ipmi_pci_devices[] = { |
1915 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
1916 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE) } | |
1917 | }; | |
1918 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
1919 | ||
1920 | static struct pci_driver ipmi_pci_driver = { | |
1921 | .name = DEVICE_NAME, | |
1922 | .id_table = ipmi_pci_devices, | |
1923 | .probe = ipmi_pci_probe, | |
1924 | .remove = __devexit_p(ipmi_pci_remove), | |
1925 | #ifdef CONFIG_PM | |
1926 | .suspend = ipmi_pci_suspend, | |
1927 | .resume = ipmi_pci_resume, | |
1928 | #endif | |
1929 | }; | |
1930 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
1931 | |
1932 | ||
1933 | static int try_get_dev_id(struct smi_info *smi_info) | |
1934 | { | |
50c812b2 CM |
1935 | unsigned char msg[2]; |
1936 | unsigned char *resp; | |
1937 | unsigned long resp_len; | |
1938 | enum si_sm_result smi_result; | |
1939 | int rv = 0; | |
1da177e4 LT |
1940 | |
1941 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
b0defcdb | 1942 | if (!resp) |
1da177e4 LT |
1943 | return -ENOMEM; |
1944 | ||
1945 | /* Do a Get Device ID command, since it comes back with some | |
1946 | useful info. */ | |
1947 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1948 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
1949 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1950 | ||
1951 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
1952 | for (;;) | |
1953 | { | |
c3e7e791 CM |
1954 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
1955 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 1956 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
1957 | smi_result = smi_info->handlers->event( |
1958 | smi_info->si_sm, 100); | |
1959 | } | |
1960 | else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) | |
1961 | { | |
1962 | smi_result = smi_info->handlers->event( | |
1963 | smi_info->si_sm, 0); | |
1964 | } | |
1965 | else | |
1966 | break; | |
1967 | } | |
1968 | if (smi_result == SI_SM_HOSED) { | |
1969 | /* We couldn't get the state machine to run, so whatever's at | |
1970 | the port is probably not an IPMI SMI interface. */ | |
1971 | rv = -ENODEV; | |
1972 | goto out; | |
1973 | } | |
1974 | ||
1975 | /* Otherwise, we got some data. */ | |
1976 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1977 | resp, IPMI_MAX_MSG_LENGTH); | |
50c812b2 | 1978 | if (resp_len < 14) { |
1da177e4 LT |
1979 | /* That's odd, it should be longer. */ |
1980 | rv = -EINVAL; | |
1981 | goto out; | |
1982 | } | |
1983 | ||
1984 | if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) { | |
1985 | /* That's odd, it shouldn't be able to fail. */ | |
1986 | rv = -EINVAL; | |
1987 | goto out; | |
1988 | } | |
1989 | ||
1990 | /* Record info from the get device id, in case we need it. */ | |
50c812b2 | 1991 | ipmi_demangle_device_id(resp+3, resp_len-3, &smi_info->device_id); |
1da177e4 LT |
1992 | |
1993 | out: | |
1994 | kfree(resp); | |
1995 | return rv; | |
1996 | } | |
1997 | ||
1998 | static int type_file_read_proc(char *page, char **start, off_t off, | |
1999 | int count, int *eof, void *data) | |
2000 | { | |
2001 | char *out = (char *) page; | |
2002 | struct smi_info *smi = data; | |
2003 | ||
2004 | switch (smi->si_type) { | |
2005 | case SI_KCS: | |
2006 | return sprintf(out, "kcs\n"); | |
2007 | case SI_SMIC: | |
2008 | return sprintf(out, "smic\n"); | |
2009 | case SI_BT: | |
2010 | return sprintf(out, "bt\n"); | |
2011 | default: | |
2012 | return 0; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2017 | int count, int *eof, void *data) | |
2018 | { | |
2019 | char *out = (char *) page; | |
2020 | struct smi_info *smi = data; | |
2021 | ||
2022 | out += sprintf(out, "interrupts_enabled: %d\n", | |
b0defcdb | 2023 | smi->irq && !smi->interrupt_disabled); |
1da177e4 LT |
2024 | out += sprintf(out, "short_timeouts: %ld\n", |
2025 | smi->short_timeouts); | |
2026 | out += sprintf(out, "long_timeouts: %ld\n", | |
2027 | smi->long_timeouts); | |
2028 | out += sprintf(out, "timeout_restarts: %ld\n", | |
2029 | smi->timeout_restarts); | |
2030 | out += sprintf(out, "idles: %ld\n", | |
2031 | smi->idles); | |
2032 | out += sprintf(out, "interrupts: %ld\n", | |
2033 | smi->interrupts); | |
2034 | out += sprintf(out, "attentions: %ld\n", | |
2035 | smi->attentions); | |
2036 | out += sprintf(out, "flag_fetches: %ld\n", | |
2037 | smi->flag_fetches); | |
2038 | out += sprintf(out, "hosed_count: %ld\n", | |
2039 | smi->hosed_count); | |
2040 | out += sprintf(out, "complete_transactions: %ld\n", | |
2041 | smi->complete_transactions); | |
2042 | out += sprintf(out, "events: %ld\n", | |
2043 | smi->events); | |
2044 | out += sprintf(out, "watchdog_pretimeouts: %ld\n", | |
2045 | smi->watchdog_pretimeouts); | |
2046 | out += sprintf(out, "incoming_messages: %ld\n", | |
2047 | smi->incoming_messages); | |
2048 | ||
2049 | return (out - ((char *) page)); | |
2050 | } | |
2051 | ||
3ae0e0f9 CM |
2052 | /* |
2053 | * oem_data_avail_to_receive_msg_avail | |
2054 | * @info - smi_info structure with msg_flags set | |
2055 | * | |
2056 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2057 | * Returns 1 indicating need to re-run handle_flags(). | |
2058 | */ | |
2059 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2060 | { | |
e8b33617 CM |
2061 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
2062 | RECEIVE_MSG_AVAIL); | |
3ae0e0f9 CM |
2063 | return 1; |
2064 | } | |
2065 | ||
2066 | /* | |
2067 | * setup_dell_poweredge_oem_data_handler | |
2068 | * @info - smi_info.device_id must be populated | |
2069 | * | |
2070 | * Systems that match, but have firmware version < 1.40 may assert | |
2071 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2072 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2073 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2074 | * as RECEIVE_MSG_AVAIL instead. | |
2075 | * | |
2076 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2077 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2078 | * change to handle that properly, we don't actually check for the | |
2079 | * firmware version. | |
2080 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2081 | * Device Revision = 0x80 | |
2082 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2083 | * Firmware Revision2 = 0x40 BCD encoded | |
2084 | * IPMI Version = 0x51 IPMI 1.5 | |
2085 | * Manufacturer ID = A2 02 00 Dell IANA | |
2086 | * | |
d5a2b89a CM |
2087 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2088 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2089 | * | |
3ae0e0f9 CM |
2090 | */ |
2091 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2092 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2093 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2094 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2095 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2096 | { | |
2097 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2098 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2099 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2100 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2101 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2102 | smi_info->oem_data_avail_handler = |
2103 | oem_data_avail_to_receive_msg_avail; | |
2104 | } | |
2105 | else if (ipmi_version_major(id) < 1 || | |
2106 | (ipmi_version_major(id) == 1 && | |
2107 | ipmi_version_minor(id) < 5)) { | |
2108 | smi_info->oem_data_avail_handler = | |
2109 | oem_data_avail_to_receive_msg_avail; | |
2110 | } | |
3ae0e0f9 CM |
2111 | } |
2112 | } | |
2113 | ||
ea94027b CM |
2114 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2115 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2116 | { | |
2117 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2118 | ||
2119 | /* Make it a reponse */ | |
2120 | msg->rsp[0] = msg->data[0] | 4; | |
2121 | msg->rsp[1] = msg->data[1]; | |
2122 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2123 | msg->rsp_size = 3; | |
2124 | smi_info->curr_msg = NULL; | |
2125 | deliver_recv_msg(smi_info, msg); | |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * dell_poweredge_bt_xaction_handler | |
2130 | * @info - smi_info.device_id must be populated | |
2131 | * | |
2132 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2133 | * not respond to a Get SDR command if the length of the data | |
2134 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2135 | * data returned. This intercepts such commands, and causes userspace | |
2136 | * callers to try again with a different-sized buffer, which succeeds. | |
2137 | */ | |
2138 | ||
2139 | #define STORAGE_NETFN 0x0A | |
2140 | #define STORAGE_CMD_GET_SDR 0x23 | |
2141 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2142 | unsigned long unused, | |
2143 | void *in) | |
2144 | { | |
2145 | struct smi_info *smi_info = in; | |
2146 | unsigned char *data = smi_info->curr_msg->data; | |
2147 | unsigned int size = smi_info->curr_msg->data_size; | |
2148 | if (size >= 8 && | |
2149 | (data[0]>>2) == STORAGE_NETFN && | |
2150 | data[1] == STORAGE_CMD_GET_SDR && | |
2151 | data[7] == 0x3A) { | |
2152 | return_hosed_msg_badsize(smi_info); | |
2153 | return NOTIFY_STOP; | |
2154 | } | |
2155 | return NOTIFY_DONE; | |
2156 | } | |
2157 | ||
2158 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2159 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2160 | }; | |
2161 | ||
2162 | /* | |
2163 | * setup_dell_poweredge_bt_xaction_handler | |
2164 | * @info - smi_info.device_id must be filled in already | |
2165 | * | |
2166 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2167 | * when we know what function to use there. | |
2168 | */ | |
2169 | static void | |
2170 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2171 | { | |
2172 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2173 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
2174 | smi_info->si_type == SI_BT) |
2175 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2176 | } | |
2177 | ||
3ae0e0f9 CM |
2178 | /* |
2179 | * setup_oem_data_handler | |
2180 | * @info - smi_info.device_id must be filled in already | |
2181 | * | |
2182 | * Fills in smi_info.device_id.oem_data_available_handler | |
2183 | * when we know what function to use there. | |
2184 | */ | |
2185 | ||
2186 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2187 | { | |
2188 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2189 | } | |
2190 | ||
ea94027b CM |
2191 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2192 | { | |
2193 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2194 | } | |
2195 | ||
a9a2c44f CM |
2196 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2197 | { | |
453823ba CM |
2198 | if (smi_info->intf) { |
2199 | /* The timer and thread are only running if the | |
2200 | interface has been started up and registered. */ | |
2201 | if (smi_info->thread != NULL) | |
2202 | kthread_stop(smi_info->thread); | |
2203 | del_timer_sync(&smi_info->si_timer); | |
2204 | } | |
a9a2c44f CM |
2205 | } |
2206 | ||
7420884c | 2207 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
2208 | { |
2209 | int type; | |
2210 | int port; | |
7420884c | 2211 | } ipmi_defaults[] = |
b0defcdb CM |
2212 | { |
2213 | { .type = SI_KCS, .port = 0xca2 }, | |
2214 | { .type = SI_SMIC, .port = 0xca9 }, | |
2215 | { .type = SI_BT, .port = 0xe4 }, | |
2216 | { .port = 0 } | |
2217 | }; | |
2218 | ||
2219 | static __devinit void default_find_bmc(void) | |
2220 | { | |
2221 | struct smi_info *info; | |
2222 | int i; | |
2223 | ||
2224 | for (i = 0; ; i++) { | |
2225 | if (!ipmi_defaults[i].port) | |
2226 | break; | |
2227 | ||
2228 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2229 | if (!info) | |
2230 | return; | |
2231 | ||
2232 | info->addr_source = NULL; | |
2233 | ||
2234 | info->si_type = ipmi_defaults[i].type; | |
2235 | info->io_setup = port_setup; | |
2236 | info->io.addr_data = ipmi_defaults[i].port; | |
2237 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2238 | ||
2239 | info->io.addr = NULL; | |
2240 | info->io.regspacing = DEFAULT_REGSPACING; | |
2241 | info->io.regsize = DEFAULT_REGSPACING; | |
2242 | info->io.regshift = 0; | |
2243 | ||
2244 | if (try_smi_init(info) == 0) { | |
2245 | /* Found one... */ | |
2246 | printk(KERN_INFO "ipmi_si: Found default %s state" | |
2247 | " machine at %s address 0x%lx\n", | |
2248 | si_to_str[info->si_type], | |
2249 | addr_space_to_str[info->io.addr_type], | |
2250 | info->io.addr_data); | |
2251 | return; | |
2252 | } | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 2257 | { |
b0defcdb | 2258 | struct smi_info *e; |
1da177e4 | 2259 | |
b0defcdb CM |
2260 | list_for_each_entry(e, &smi_infos, link) { |
2261 | if (e->io.addr_type != info->io.addr_type) | |
2262 | continue; | |
2263 | if (e->io.addr_data == info->io.addr_data) | |
2264 | return 0; | |
2265 | } | |
1da177e4 | 2266 | |
b0defcdb CM |
2267 | return 1; |
2268 | } | |
1da177e4 | 2269 | |
b0defcdb CM |
2270 | static int try_smi_init(struct smi_info *new_smi) |
2271 | { | |
2272 | int rv; | |
2273 | ||
2274 | if (new_smi->addr_source) { | |
2275 | printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" | |
2276 | " machine at %s address 0x%lx, slave address 0x%x," | |
2277 | " irq %d\n", | |
2278 | new_smi->addr_source, | |
2279 | si_to_str[new_smi->si_type], | |
2280 | addr_space_to_str[new_smi->io.addr_type], | |
2281 | new_smi->io.addr_data, | |
2282 | new_smi->slave_addr, new_smi->irq); | |
2283 | } | |
2284 | ||
d6dfd131 | 2285 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2286 | if (!is_new_interface(new_smi)) { |
2287 | printk(KERN_WARNING "ipmi_si: duplicate interface\n"); | |
2288 | rv = -EBUSY; | |
2289 | goto out_err; | |
2290 | } | |
1da177e4 LT |
2291 | |
2292 | /* So we know not to free it unless we have allocated one. */ | |
2293 | new_smi->intf = NULL; | |
2294 | new_smi->si_sm = NULL; | |
2295 | new_smi->handlers = NULL; | |
2296 | ||
b0defcdb CM |
2297 | switch (new_smi->si_type) { |
2298 | case SI_KCS: | |
1da177e4 | 2299 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
2300 | break; |
2301 | ||
2302 | case SI_SMIC: | |
1da177e4 | 2303 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
2304 | break; |
2305 | ||
2306 | case SI_BT: | |
1da177e4 | 2307 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
2308 | break; |
2309 | ||
2310 | default: | |
1da177e4 LT |
2311 | /* No support for anything else yet. */ |
2312 | rv = -EIO; | |
2313 | goto out_err; | |
2314 | } | |
2315 | ||
2316 | /* Allocate the state machine's data and initialize it. */ | |
2317 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 2318 | if (!new_smi->si_sm) { |
1da177e4 LT |
2319 | printk(" Could not allocate state machine memory\n"); |
2320 | rv = -ENOMEM; | |
2321 | goto out_err; | |
2322 | } | |
2323 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
2324 | &new_smi->io); | |
2325 | ||
2326 | /* Now that we know the I/O size, we can set up the I/O. */ | |
2327 | rv = new_smi->io_setup(new_smi); | |
2328 | if (rv) { | |
2329 | printk(" Could not set up I/O space\n"); | |
2330 | goto out_err; | |
2331 | } | |
2332 | ||
2333 | spin_lock_init(&(new_smi->si_lock)); | |
2334 | spin_lock_init(&(new_smi->msg_lock)); | |
2335 | spin_lock_init(&(new_smi->count_lock)); | |
2336 | ||
2337 | /* Do low-level detection first. */ | |
2338 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb CM |
2339 | if (new_smi->addr_source) |
2340 | printk(KERN_INFO "ipmi_si: Interface detection" | |
2341 | " failed\n"); | |
1da177e4 LT |
2342 | rv = -ENODEV; |
2343 | goto out_err; | |
2344 | } | |
2345 | ||
2346 | /* Attempt a get device id command. If it fails, we probably | |
b0defcdb | 2347 | don't have a BMC here. */ |
1da177e4 | 2348 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
2349 | if (rv) { |
2350 | if (new_smi->addr_source) | |
2351 | printk(KERN_INFO "ipmi_si: There appears to be no BMC" | |
2352 | " at this location\n"); | |
1da177e4 | 2353 | goto out_err; |
b0defcdb | 2354 | } |
1da177e4 | 2355 | |
3ae0e0f9 | 2356 | setup_oem_data_handler(new_smi); |
ea94027b | 2357 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 2358 | |
1da177e4 | 2359 | /* Try to claim any interrupts. */ |
b0defcdb CM |
2360 | if (new_smi->irq_setup) |
2361 | new_smi->irq_setup(new_smi); | |
1da177e4 LT |
2362 | |
2363 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); | |
2364 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
2365 | new_smi->curr_msg = NULL; | |
2366 | atomic_set(&new_smi->req_events, 0); | |
2367 | new_smi->run_to_completion = 0; | |
2368 | ||
2369 | new_smi->interrupt_disabled = 0; | |
a9a2c44f | 2370 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
2371 | new_smi->intf_num = smi_num; |
2372 | smi_num++; | |
1da177e4 LT |
2373 | |
2374 | /* Start clearing the flags before we enable interrupts or the | |
2375 | timer to avoid racing with the timer. */ | |
2376 | start_clear_flags(new_smi); | |
2377 | /* IRQ is defined to be set when non-zero. */ | |
2378 | if (new_smi->irq) | |
2379 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
2380 | ||
50c812b2 CM |
2381 | if (!new_smi->dev) { |
2382 | /* If we don't already have a device from something | |
2383 | * else (like PCI), then register a new one. */ | |
2384 | new_smi->pdev = platform_device_alloc("ipmi_si", | |
2385 | new_smi->intf_num); | |
2386 | if (rv) { | |
2387 | printk(KERN_ERR | |
2388 | "ipmi_si_intf:" | |
2389 | " Unable to allocate platform device\n"); | |
453823ba | 2390 | goto out_err; |
50c812b2 CM |
2391 | } |
2392 | new_smi->dev = &new_smi->pdev->dev; | |
2393 | new_smi->dev->driver = &ipmi_driver; | |
2394 | ||
2395 | rv = platform_device_register(new_smi->pdev); | |
2396 | if (rv) { | |
2397 | printk(KERN_ERR | |
2398 | "ipmi_si_intf:" | |
2399 | " Unable to register system interface device:" | |
2400 | " %d\n", | |
2401 | rv); | |
453823ba | 2402 | goto out_err; |
50c812b2 CM |
2403 | } |
2404 | new_smi->dev_registered = 1; | |
2405 | } | |
2406 | ||
1da177e4 LT |
2407 | rv = ipmi_register_smi(&handlers, |
2408 | new_smi, | |
50c812b2 CM |
2409 | &new_smi->device_id, |
2410 | new_smi->dev, | |
453823ba | 2411 | new_smi->slave_addr); |
1da177e4 LT |
2412 | if (rv) { |
2413 | printk(KERN_ERR | |
2414 | "ipmi_si: Unable to register device: error %d\n", | |
2415 | rv); | |
2416 | goto out_err_stop_timer; | |
2417 | } | |
2418 | ||
2419 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
2420 | type_file_read_proc, NULL, | |
2421 | new_smi, THIS_MODULE); | |
2422 | if (rv) { | |
2423 | printk(KERN_ERR | |
2424 | "ipmi_si: Unable to create proc entry: %d\n", | |
2425 | rv); | |
2426 | goto out_err_stop_timer; | |
2427 | } | |
2428 | ||
2429 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
2430 | stat_file_read_proc, NULL, | |
2431 | new_smi, THIS_MODULE); | |
2432 | if (rv) { | |
2433 | printk(KERN_ERR | |
2434 | "ipmi_si: Unable to create proc entry: %d\n", | |
2435 | rv); | |
2436 | goto out_err_stop_timer; | |
2437 | } | |
2438 | ||
b0defcdb CM |
2439 | list_add_tail(&new_smi->link, &smi_infos); |
2440 | ||
d6dfd131 | 2441 | mutex_unlock(&smi_infos_lock); |
1da177e4 | 2442 | |
b0defcdb | 2443 | printk(" IPMI %s interface initialized\n",si_to_str[new_smi->si_type]); |
1da177e4 LT |
2444 | |
2445 | return 0; | |
2446 | ||
2447 | out_err_stop_timer: | |
a9a2c44f CM |
2448 | atomic_inc(&new_smi->stop_operation); |
2449 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
2450 | |
2451 | out_err: | |
2452 | if (new_smi->intf) | |
2453 | ipmi_unregister_smi(new_smi->intf); | |
2454 | ||
b0defcdb CM |
2455 | if (new_smi->irq_cleanup) |
2456 | new_smi->irq_cleanup(new_smi); | |
1da177e4 LT |
2457 | |
2458 | /* Wait until we know that we are out of any interrupt | |
2459 | handlers might have been running before we freed the | |
2460 | interrupt. */ | |
fbd568a3 | 2461 | synchronize_sched(); |
1da177e4 LT |
2462 | |
2463 | if (new_smi->si_sm) { | |
2464 | if (new_smi->handlers) | |
2465 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2466 | kfree(new_smi->si_sm); | |
2467 | } | |
b0defcdb CM |
2468 | if (new_smi->addr_source_cleanup) |
2469 | new_smi->addr_source_cleanup(new_smi); | |
7767e126 PG |
2470 | if (new_smi->io_cleanup) |
2471 | new_smi->io_cleanup(new_smi); | |
1da177e4 | 2472 | |
50c812b2 CM |
2473 | if (new_smi->dev_registered) |
2474 | platform_device_unregister(new_smi->pdev); | |
2475 | ||
2476 | kfree(new_smi); | |
2477 | ||
d6dfd131 | 2478 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2479 | |
1da177e4 LT |
2480 | return rv; |
2481 | } | |
2482 | ||
b0defcdb | 2483 | static __devinit int init_ipmi_si(void) |
1da177e4 | 2484 | { |
1da177e4 LT |
2485 | int i; |
2486 | char *str; | |
50c812b2 | 2487 | int rv; |
1da177e4 LT |
2488 | |
2489 | if (initialized) | |
2490 | return 0; | |
2491 | initialized = 1; | |
2492 | ||
50c812b2 CM |
2493 | /* Register the device drivers. */ |
2494 | rv = driver_register(&ipmi_driver); | |
2495 | if (rv) { | |
2496 | printk(KERN_ERR | |
2497 | "init_ipmi_si: Unable to register driver: %d\n", | |
2498 | rv); | |
2499 | return rv; | |
2500 | } | |
2501 | ||
2502 | ||
1da177e4 LT |
2503 | /* Parse out the si_type string into its components. */ |
2504 | str = si_type_str; | |
2505 | if (*str != '\0') { | |
e8b33617 | 2506 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
2507 | si_type[i] = str; |
2508 | str = strchr(str, ','); | |
2509 | if (str) { | |
2510 | *str = '\0'; | |
2511 | str++; | |
2512 | } else { | |
2513 | break; | |
2514 | } | |
2515 | } | |
2516 | } | |
2517 | ||
1fdd75bd | 2518 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 2519 | |
b0defcdb CM |
2520 | hardcode_find_bmc(); |
2521 | ||
a9fad4cc | 2522 | #ifdef CONFIG_DMI |
b224cd3a | 2523 | dmi_find_bmc(); |
1da177e4 LT |
2524 | #endif |
2525 | ||
b0defcdb CM |
2526 | #ifdef CONFIG_ACPI |
2527 | if (si_trydefaults) | |
2528 | acpi_find_bmc(); | |
2529 | #endif | |
1da177e4 | 2530 | |
b0defcdb CM |
2531 | #ifdef CONFIG_PCI |
2532 | pci_module_init(&ipmi_pci_driver); | |
2533 | #endif | |
2534 | ||
2535 | if (si_trydefaults) { | |
d6dfd131 | 2536 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2537 | if (list_empty(&smi_infos)) { |
2538 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 2539 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
2540 | default_find_bmc(); |
2541 | } else { | |
d6dfd131 | 2542 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2543 | } |
1da177e4 LT |
2544 | } |
2545 | ||
d6dfd131 | 2546 | mutex_lock(&smi_infos_lock); |
b0defcdb | 2547 | if (list_empty(&smi_infos)) { |
d6dfd131 | 2548 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
2549 | #ifdef CONFIG_PCI |
2550 | pci_unregister_driver(&ipmi_pci_driver); | |
2551 | #endif | |
1da177e4 LT |
2552 | printk("ipmi_si: Unable to find any System Interface(s)\n"); |
2553 | return -ENODEV; | |
b0defcdb | 2554 | } else { |
d6dfd131 | 2555 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2556 | return 0; |
1da177e4 | 2557 | } |
1da177e4 LT |
2558 | } |
2559 | module_init(init_ipmi_si); | |
2560 | ||
b0defcdb | 2561 | static void __devexit cleanup_one_si(struct smi_info *to_clean) |
1da177e4 LT |
2562 | { |
2563 | int rv; | |
2564 | unsigned long flags; | |
2565 | ||
b0defcdb | 2566 | if (!to_clean) |
1da177e4 LT |
2567 | return; |
2568 | ||
b0defcdb CM |
2569 | list_del(&to_clean->link); |
2570 | ||
1da177e4 LT |
2571 | /* Tell the timer and interrupt handlers that we are shutting |
2572 | down. */ | |
2573 | spin_lock_irqsave(&(to_clean->si_lock), flags); | |
2574 | spin_lock(&(to_clean->msg_lock)); | |
2575 | ||
a9a2c44f | 2576 | atomic_inc(&to_clean->stop_operation); |
b0defcdb CM |
2577 | |
2578 | if (to_clean->irq_cleanup) | |
2579 | to_clean->irq_cleanup(to_clean); | |
1da177e4 LT |
2580 | |
2581 | spin_unlock(&(to_clean->msg_lock)); | |
2582 | spin_unlock_irqrestore(&(to_clean->si_lock), flags); | |
2583 | ||
2584 | /* Wait until we know that we are out of any interrupt | |
2585 | handlers might have been running before we freed the | |
2586 | interrupt. */ | |
fbd568a3 | 2587 | synchronize_sched(); |
1da177e4 | 2588 | |
a9a2c44f | 2589 | wait_for_timer_and_thread(to_clean); |
1da177e4 LT |
2590 | |
2591 | /* Interrupts and timeouts are stopped, now make sure the | |
2592 | interface is in a clean state. */ | |
e8b33617 | 2593 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 2594 | poll(to_clean); |
da4cd8df | 2595 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2596 | } |
2597 | ||
2598 | rv = ipmi_unregister_smi(to_clean->intf); | |
2599 | if (rv) { | |
2600 | printk(KERN_ERR | |
2601 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
2602 | rv); | |
2603 | } | |
2604 | ||
2605 | to_clean->handlers->cleanup(to_clean->si_sm); | |
2606 | ||
2607 | kfree(to_clean->si_sm); | |
2608 | ||
b0defcdb CM |
2609 | if (to_clean->addr_source_cleanup) |
2610 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
2611 | if (to_clean->io_cleanup) |
2612 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
2613 | |
2614 | if (to_clean->dev_registered) | |
2615 | platform_device_unregister(to_clean->pdev); | |
2616 | ||
2617 | kfree(to_clean); | |
1da177e4 LT |
2618 | } |
2619 | ||
2620 | static __exit void cleanup_ipmi_si(void) | |
2621 | { | |
b0defcdb | 2622 | struct smi_info *e, *tmp_e; |
1da177e4 | 2623 | |
b0defcdb | 2624 | if (!initialized) |
1da177e4 LT |
2625 | return; |
2626 | ||
b0defcdb CM |
2627 | #ifdef CONFIG_PCI |
2628 | pci_unregister_driver(&ipmi_pci_driver); | |
2629 | #endif | |
2630 | ||
d6dfd131 | 2631 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2632 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
2633 | cleanup_one_si(e); | |
d6dfd131 | 2634 | mutex_unlock(&smi_infos_lock); |
50c812b2 CM |
2635 | |
2636 | driver_unregister(&ipmi_driver); | |
1da177e4 LT |
2637 | } |
2638 | module_exit(cleanup_ipmi_si); | |
2639 | ||
2640 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
2641 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
2642 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT system interfaces."); |