Commit | Line | Data |
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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> |
e9a705a0 | 55 | #include <linux/kthread.h> |
1da177e4 LT |
56 | #include <asm/irq.h> |
57 | #ifdef CONFIG_HIGH_RES_TIMERS | |
58 | #include <linux/hrtime.h> | |
59 | # if defined(schedule_next_int) | |
60 | /* Old high-res timer code, do translations. */ | |
61 | # define get_arch_cycles(a) quick_update_jiffies_sub(a) | |
62 | # define arch_cycles_per_jiffy cycles_per_jiffies | |
63 | # endif | |
64 | static inline void add_usec_to_timer(struct timer_list *t, long v) | |
65 | { | |
75b0768a CM |
66 | t->arch_cycle_expires += nsec_to_arch_cycle(v * 1000); |
67 | while (t->arch_cycle_expires >= arch_cycles_per_jiffy) | |
1da177e4 LT |
68 | { |
69 | t->expires++; | |
75b0768a | 70 | t->arch_cycle_expires -= arch_cycles_per_jiffy; |
1da177e4 LT |
71 | } |
72 | } | |
73 | #endif | |
74 | #include <linux/interrupt.h> | |
75 | #include <linux/rcupdate.h> | |
76 | #include <linux/ipmi_smi.h> | |
77 | #include <asm/io.h> | |
78 | #include "ipmi_si_sm.h" | |
79 | #include <linux/init.h> | |
b224cd3a | 80 | #include <linux/dmi.h> |
1da177e4 LT |
81 | |
82 | /* Measure times between events in the driver. */ | |
83 | #undef DEBUG_TIMING | |
84 | ||
85 | /* Call every 10 ms. */ | |
86 | #define SI_TIMEOUT_TIME_USEC 10000 | |
87 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
88 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
89 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
90 | short timeout */ | |
91 | ||
92 | enum si_intf_state { | |
93 | SI_NORMAL, | |
94 | SI_GETTING_FLAGS, | |
95 | SI_GETTING_EVENTS, | |
96 | SI_CLEARING_FLAGS, | |
97 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
98 | SI_GETTING_MESSAGES, | |
99 | SI_ENABLE_INTERRUPTS1, | |
100 | SI_ENABLE_INTERRUPTS2 | |
101 | /* FIXME - add watchdog stuff. */ | |
102 | }; | |
103 | ||
9dbf68f9 CM |
104 | /* Some BT-specific defines we need here. */ |
105 | #define IPMI_BT_INTMASK_REG 2 | |
106 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
107 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
108 | ||
1da177e4 LT |
109 | enum si_type { |
110 | SI_KCS, SI_SMIC, SI_BT | |
111 | }; | |
112 | ||
3ae0e0f9 CM |
113 | struct ipmi_device_id { |
114 | unsigned char device_id; | |
115 | unsigned char device_revision; | |
116 | unsigned char firmware_revision_1; | |
117 | unsigned char firmware_revision_2; | |
118 | unsigned char ipmi_version; | |
119 | unsigned char additional_device_support; | |
120 | unsigned char manufacturer_id[3]; | |
121 | unsigned char product_id[2]; | |
122 | unsigned char aux_firmware_revision[4]; | |
123 | } __attribute__((packed)); | |
124 | ||
125 | #define ipmi_version_major(v) ((v)->ipmi_version & 0xf) | |
126 | #define ipmi_version_minor(v) ((v)->ipmi_version >> 4) | |
127 | ||
1da177e4 LT |
128 | struct smi_info |
129 | { | |
a9a2c44f | 130 | int intf_num; |
1da177e4 LT |
131 | ipmi_smi_t intf; |
132 | struct si_sm_data *si_sm; | |
133 | struct si_sm_handlers *handlers; | |
134 | enum si_type si_type; | |
135 | spinlock_t si_lock; | |
136 | spinlock_t msg_lock; | |
137 | struct list_head xmit_msgs; | |
138 | struct list_head hp_xmit_msgs; | |
139 | struct ipmi_smi_msg *curr_msg; | |
140 | enum si_intf_state si_state; | |
141 | ||
142 | /* Used to handle the various types of I/O that can occur with | |
143 | IPMI */ | |
144 | struct si_sm_io io; | |
145 | int (*io_setup)(struct smi_info *info); | |
146 | void (*io_cleanup)(struct smi_info *info); | |
147 | int (*irq_setup)(struct smi_info *info); | |
148 | void (*irq_cleanup)(struct smi_info *info); | |
149 | unsigned int io_size; | |
150 | ||
3ae0e0f9 CM |
151 | /* Per-OEM handler, called from handle_flags(). |
152 | Returns 1 when handle_flags() needs to be re-run | |
153 | or 0 indicating it set si_state itself. | |
154 | */ | |
155 | int (*oem_data_avail_handler)(struct smi_info *smi_info); | |
156 | ||
1da177e4 LT |
157 | /* Flags from the last GET_MSG_FLAGS command, used when an ATTN |
158 | is set to hold the flags until we are done handling everything | |
159 | from the flags. */ | |
160 | #define RECEIVE_MSG_AVAIL 0x01 | |
161 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
162 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
163 | #define OEM0_DATA_AVAIL 0x20 |
164 | #define OEM1_DATA_AVAIL 0x40 | |
165 | #define OEM2_DATA_AVAIL 0x80 | |
166 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
167 | OEM1_DATA_AVAIL | \ | |
168 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
169 | unsigned char msg_flags; |
170 | ||
171 | /* If set to true, this will request events the next time the | |
172 | state machine is idle. */ | |
173 | atomic_t req_events; | |
174 | ||
175 | /* If true, run the state machine to completion on every send | |
176 | call. Generally used after a panic to make sure stuff goes | |
177 | out. */ | |
178 | int run_to_completion; | |
179 | ||
180 | /* The I/O port of an SI interface. */ | |
181 | int port; | |
182 | ||
183 | /* The space between start addresses of the two ports. For | |
184 | instance, if the first port is 0xca2 and the spacing is 4, then | |
185 | the second port is 0xca6. */ | |
186 | unsigned int spacing; | |
187 | ||
188 | /* zero if no irq; */ | |
189 | int irq; | |
190 | ||
191 | /* The timer for this si. */ | |
192 | struct timer_list si_timer; | |
193 | ||
194 | /* The time (in jiffies) the last timeout occurred at. */ | |
195 | unsigned long last_timeout_jiffies; | |
196 | ||
197 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 198 | atomic_t stop_operation; |
1da177e4 LT |
199 | |
200 | /* The driver will disable interrupts when it gets into a | |
201 | situation where it cannot handle messages due to lack of | |
202 | memory. Once that situation clears up, it will re-enable | |
203 | interrupts. */ | |
204 | int interrupt_disabled; | |
205 | ||
3ae0e0f9 | 206 | struct ipmi_device_id device_id; |
1da177e4 LT |
207 | |
208 | /* Slave address, could be reported from DMI. */ | |
209 | unsigned char slave_addr; | |
210 | ||
211 | /* Counters and things for the proc filesystem. */ | |
212 | spinlock_t count_lock; | |
213 | unsigned long short_timeouts; | |
214 | unsigned long long_timeouts; | |
215 | unsigned long timeout_restarts; | |
216 | unsigned long idles; | |
217 | unsigned long interrupts; | |
218 | unsigned long attentions; | |
219 | unsigned long flag_fetches; | |
220 | unsigned long hosed_count; | |
221 | unsigned long complete_transactions; | |
222 | unsigned long events; | |
223 | unsigned long watchdog_pretimeouts; | |
224 | unsigned long incoming_messages; | |
a9a2c44f | 225 | |
e9a705a0 | 226 | struct task_struct *thread; |
1da177e4 LT |
227 | }; |
228 | ||
ea94027b CM |
229 | static struct notifier_block *xaction_notifier_list; |
230 | static int register_xaction_notifier(struct notifier_block * nb) | |
231 | { | |
232 | return notifier_chain_register(&xaction_notifier_list, nb); | |
233 | } | |
234 | ||
1da177e4 LT |
235 | static void si_restart_short_timer(struct smi_info *smi_info); |
236 | ||
237 | static void deliver_recv_msg(struct smi_info *smi_info, | |
238 | struct ipmi_smi_msg *msg) | |
239 | { | |
240 | /* Deliver the message to the upper layer with the lock | |
241 | released. */ | |
242 | spin_unlock(&(smi_info->si_lock)); | |
243 | ipmi_smi_msg_received(smi_info->intf, msg); | |
244 | spin_lock(&(smi_info->si_lock)); | |
245 | } | |
246 | ||
247 | static void return_hosed_msg(struct smi_info *smi_info) | |
248 | { | |
249 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
250 | ||
251 | /* Make it a reponse */ | |
252 | msg->rsp[0] = msg->data[0] | 4; | |
253 | msg->rsp[1] = msg->data[1]; | |
254 | msg->rsp[2] = 0xFF; /* Unknown error. */ | |
255 | msg->rsp_size = 3; | |
256 | ||
257 | smi_info->curr_msg = NULL; | |
258 | deliver_recv_msg(smi_info, msg); | |
259 | } | |
260 | ||
261 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
262 | { | |
263 | int rv; | |
264 | struct list_head *entry = NULL; | |
265 | #ifdef DEBUG_TIMING | |
266 | struct timeval t; | |
267 | #endif | |
268 | ||
269 | /* No need to save flags, we aleady have interrupts off and we | |
270 | already hold the SMI lock. */ | |
271 | spin_lock(&(smi_info->msg_lock)); | |
272 | ||
273 | /* Pick the high priority queue first. */ | |
274 | if (! list_empty(&(smi_info->hp_xmit_msgs))) { | |
275 | entry = smi_info->hp_xmit_msgs.next; | |
276 | } else if (! list_empty(&(smi_info->xmit_msgs))) { | |
277 | entry = smi_info->xmit_msgs.next; | |
278 | } | |
279 | ||
e8b33617 | 280 | if (! entry) { |
1da177e4 LT |
281 | smi_info->curr_msg = NULL; |
282 | rv = SI_SM_IDLE; | |
283 | } else { | |
284 | int err; | |
285 | ||
286 | list_del(entry); | |
287 | smi_info->curr_msg = list_entry(entry, | |
288 | struct ipmi_smi_msg, | |
289 | link); | |
290 | #ifdef DEBUG_TIMING | |
291 | do_gettimeofday(&t); | |
292 | printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
293 | #endif | |
ea94027b CM |
294 | err = notifier_call_chain(&xaction_notifier_list, 0, smi_info); |
295 | if (err & NOTIFY_STOP_MASK) { | |
296 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
297 | goto out; | |
298 | } | |
1da177e4 LT |
299 | err = smi_info->handlers->start_transaction( |
300 | smi_info->si_sm, | |
301 | smi_info->curr_msg->data, | |
302 | smi_info->curr_msg->data_size); | |
303 | if (err) { | |
304 | return_hosed_msg(smi_info); | |
305 | } | |
306 | ||
307 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
308 | } | |
ea94027b | 309 | out: |
1da177e4 LT |
310 | spin_unlock(&(smi_info->msg_lock)); |
311 | ||
312 | return rv; | |
313 | } | |
314 | ||
315 | static void start_enable_irq(struct smi_info *smi_info) | |
316 | { | |
317 | unsigned char msg[2]; | |
318 | ||
319 | /* If we are enabling interrupts, we have to tell the | |
320 | BMC to use them. */ | |
321 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
322 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
323 | ||
324 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
325 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
326 | } | |
327 | ||
328 | static void start_clear_flags(struct smi_info *smi_info) | |
329 | { | |
330 | unsigned char msg[3]; | |
331 | ||
332 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
333 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
334 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
335 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
336 | ||
337 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
338 | smi_info->si_state = SI_CLEARING_FLAGS; | |
339 | } | |
340 | ||
341 | /* When we have a situtaion where we run out of memory and cannot | |
342 | allocate messages, we just leave them in the BMC and run the system | |
343 | polled until we can allocate some memory. Once we have some | |
344 | memory, we will re-enable the interrupt. */ | |
345 | static inline void disable_si_irq(struct smi_info *smi_info) | |
346 | { | |
e8b33617 | 347 | if ((smi_info->irq) && (! smi_info->interrupt_disabled)) { |
1da177e4 LT |
348 | disable_irq_nosync(smi_info->irq); |
349 | smi_info->interrupt_disabled = 1; | |
350 | } | |
351 | } | |
352 | ||
353 | static inline void enable_si_irq(struct smi_info *smi_info) | |
354 | { | |
355 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
356 | enable_irq(smi_info->irq); | |
357 | smi_info->interrupt_disabled = 0; | |
358 | } | |
359 | } | |
360 | ||
361 | static void handle_flags(struct smi_info *smi_info) | |
362 | { | |
3ae0e0f9 | 363 | retry: |
1da177e4 LT |
364 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
365 | /* Watchdog pre-timeout */ | |
366 | spin_lock(&smi_info->count_lock); | |
367 | smi_info->watchdog_pretimeouts++; | |
368 | spin_unlock(&smi_info->count_lock); | |
369 | ||
370 | start_clear_flags(smi_info); | |
371 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
372 | spin_unlock(&(smi_info->si_lock)); | |
373 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
374 | spin_lock(&(smi_info->si_lock)); | |
375 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
376 | /* Messages available. */ | |
377 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
e8b33617 | 378 | if (! smi_info->curr_msg) { |
1da177e4 LT |
379 | disable_si_irq(smi_info); |
380 | smi_info->si_state = SI_NORMAL; | |
381 | return; | |
382 | } | |
383 | enable_si_irq(smi_info); | |
384 | ||
385 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
386 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
387 | smi_info->curr_msg->data_size = 2; | |
388 | ||
389 | smi_info->handlers->start_transaction( | |
390 | smi_info->si_sm, | |
391 | smi_info->curr_msg->data, | |
392 | smi_info->curr_msg->data_size); | |
393 | smi_info->si_state = SI_GETTING_MESSAGES; | |
394 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
395 | /* Events available. */ | |
396 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
e8b33617 | 397 | if (! smi_info->curr_msg) { |
1da177e4 LT |
398 | disable_si_irq(smi_info); |
399 | smi_info->si_state = SI_NORMAL; | |
400 | return; | |
401 | } | |
402 | enable_si_irq(smi_info); | |
403 | ||
404 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
405 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
406 | smi_info->curr_msg->data_size = 2; | |
407 | ||
408 | smi_info->handlers->start_transaction( | |
409 | smi_info->si_sm, | |
410 | smi_info->curr_msg->data, | |
411 | smi_info->curr_msg->data_size); | |
412 | smi_info->si_state = SI_GETTING_EVENTS; | |
3ae0e0f9 CM |
413 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL) { |
414 | if (smi_info->oem_data_avail_handler) | |
415 | if (smi_info->oem_data_avail_handler(smi_info)) | |
416 | goto retry; | |
1da177e4 LT |
417 | } else { |
418 | smi_info->si_state = SI_NORMAL; | |
419 | } | |
420 | } | |
421 | ||
422 | static void handle_transaction_done(struct smi_info *smi_info) | |
423 | { | |
424 | struct ipmi_smi_msg *msg; | |
425 | #ifdef DEBUG_TIMING | |
426 | struct timeval t; | |
427 | ||
428 | do_gettimeofday(&t); | |
429 | printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
430 | #endif | |
431 | switch (smi_info->si_state) { | |
432 | case SI_NORMAL: | |
e8b33617 | 433 | if (! smi_info->curr_msg) |
1da177e4 LT |
434 | break; |
435 | ||
436 | smi_info->curr_msg->rsp_size | |
437 | = smi_info->handlers->get_result( | |
438 | smi_info->si_sm, | |
439 | smi_info->curr_msg->rsp, | |
440 | IPMI_MAX_MSG_LENGTH); | |
441 | ||
442 | /* Do this here becase deliver_recv_msg() releases the | |
443 | lock, and a new message can be put in during the | |
444 | time the lock is released. */ | |
445 | msg = smi_info->curr_msg; | |
446 | smi_info->curr_msg = NULL; | |
447 | deliver_recv_msg(smi_info, msg); | |
448 | break; | |
449 | ||
450 | case SI_GETTING_FLAGS: | |
451 | { | |
452 | unsigned char msg[4]; | |
453 | unsigned int len; | |
454 | ||
455 | /* We got the flags from the SMI, now handle them. */ | |
456 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
457 | if (msg[2] != 0) { | |
458 | /* Error fetching flags, just give up for | |
459 | now. */ | |
460 | smi_info->si_state = SI_NORMAL; | |
461 | } else if (len < 4) { | |
462 | /* Hmm, no flags. That's technically illegal, but | |
463 | don't use uninitialized data. */ | |
464 | smi_info->si_state = SI_NORMAL; | |
465 | } else { | |
466 | smi_info->msg_flags = msg[3]; | |
467 | handle_flags(smi_info); | |
468 | } | |
469 | break; | |
470 | } | |
471 | ||
472 | case SI_CLEARING_FLAGS: | |
473 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
474 | { | |
475 | unsigned char msg[3]; | |
476 | ||
477 | /* We cleared the flags. */ | |
478 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
479 | if (msg[2] != 0) { | |
480 | /* Error clearing flags */ | |
481 | printk(KERN_WARNING | |
482 | "ipmi_si: Error clearing flags: %2.2x\n", | |
483 | msg[2]); | |
484 | } | |
485 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
486 | start_enable_irq(smi_info); | |
487 | else | |
488 | smi_info->si_state = SI_NORMAL; | |
489 | break; | |
490 | } | |
491 | ||
492 | case SI_GETTING_EVENTS: | |
493 | { | |
494 | smi_info->curr_msg->rsp_size | |
495 | = smi_info->handlers->get_result( | |
496 | smi_info->si_sm, | |
497 | smi_info->curr_msg->rsp, | |
498 | IPMI_MAX_MSG_LENGTH); | |
499 | ||
500 | /* Do this here becase deliver_recv_msg() releases the | |
501 | lock, and a new message can be put in during the | |
502 | time the lock is released. */ | |
503 | msg = smi_info->curr_msg; | |
504 | smi_info->curr_msg = NULL; | |
505 | if (msg->rsp[2] != 0) { | |
506 | /* Error getting event, probably done. */ | |
507 | msg->done(msg); | |
508 | ||
509 | /* Take off the event flag. */ | |
510 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
511 | handle_flags(smi_info); | |
512 | } else { | |
513 | spin_lock(&smi_info->count_lock); | |
514 | smi_info->events++; | |
515 | spin_unlock(&smi_info->count_lock); | |
516 | ||
517 | /* Do this before we deliver the message | |
518 | because delivering the message releases the | |
519 | lock and something else can mess with the | |
520 | state. */ | |
521 | handle_flags(smi_info); | |
522 | ||
523 | deliver_recv_msg(smi_info, msg); | |
524 | } | |
525 | break; | |
526 | } | |
527 | ||
528 | case SI_GETTING_MESSAGES: | |
529 | { | |
530 | smi_info->curr_msg->rsp_size | |
531 | = smi_info->handlers->get_result( | |
532 | smi_info->si_sm, | |
533 | smi_info->curr_msg->rsp, | |
534 | IPMI_MAX_MSG_LENGTH); | |
535 | ||
536 | /* Do this here becase deliver_recv_msg() releases the | |
537 | lock, and a new message can be put in during the | |
538 | time the lock is released. */ | |
539 | msg = smi_info->curr_msg; | |
540 | smi_info->curr_msg = NULL; | |
541 | if (msg->rsp[2] != 0) { | |
542 | /* Error getting event, probably done. */ | |
543 | msg->done(msg); | |
544 | ||
545 | /* Take off the msg flag. */ | |
546 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
547 | handle_flags(smi_info); | |
548 | } else { | |
549 | spin_lock(&smi_info->count_lock); | |
550 | smi_info->incoming_messages++; | |
551 | spin_unlock(&smi_info->count_lock); | |
552 | ||
553 | /* Do this before we deliver the message | |
554 | because delivering the message releases the | |
555 | lock and something else can mess with the | |
556 | state. */ | |
557 | handle_flags(smi_info); | |
558 | ||
559 | deliver_recv_msg(smi_info, msg); | |
560 | } | |
561 | break; | |
562 | } | |
563 | ||
564 | case SI_ENABLE_INTERRUPTS1: | |
565 | { | |
566 | unsigned char msg[4]; | |
567 | ||
568 | /* We got the flags from the SMI, now handle them. */ | |
569 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
570 | if (msg[2] != 0) { | |
571 | printk(KERN_WARNING | |
572 | "ipmi_si: Could not enable interrupts" | |
573 | ", failed get, using polled mode.\n"); | |
574 | smi_info->si_state = SI_NORMAL; | |
575 | } else { | |
576 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
577 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
578 | msg[2] = msg[3] | 1; /* enable msg queue int */ | |
579 | smi_info->handlers->start_transaction( | |
580 | smi_info->si_sm, msg, 3); | |
581 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
582 | } | |
583 | break; | |
584 | } | |
585 | ||
586 | case SI_ENABLE_INTERRUPTS2: | |
587 | { | |
588 | unsigned char msg[4]; | |
589 | ||
590 | /* We got the flags from the SMI, now handle them. */ | |
591 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
592 | if (msg[2] != 0) { | |
593 | printk(KERN_WARNING | |
594 | "ipmi_si: Could not enable interrupts" | |
595 | ", failed set, using polled mode.\n"); | |
596 | } | |
597 | smi_info->si_state = SI_NORMAL; | |
598 | break; | |
599 | } | |
600 | } | |
601 | } | |
602 | ||
603 | /* Called on timeouts and events. Timeouts should pass the elapsed | |
604 | time, interrupts should pass in zero. */ | |
605 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, | |
606 | int time) | |
607 | { | |
608 | enum si_sm_result si_sm_result; | |
609 | ||
610 | restart: | |
611 | /* There used to be a loop here that waited a little while | |
612 | (around 25us) before giving up. That turned out to be | |
613 | pointless, the minimum delays I was seeing were in the 300us | |
614 | range, which is far too long to wait in an interrupt. So | |
615 | we just run until the state machine tells us something | |
616 | happened or it needs a delay. */ | |
617 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); | |
618 | time = 0; | |
619 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
620 | { | |
621 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
622 | } | |
623 | ||
624 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) | |
625 | { | |
626 | spin_lock(&smi_info->count_lock); | |
627 | smi_info->complete_transactions++; | |
628 | spin_unlock(&smi_info->count_lock); | |
629 | ||
630 | handle_transaction_done(smi_info); | |
631 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
632 | } | |
633 | else if (si_sm_result == SI_SM_HOSED) | |
634 | { | |
635 | spin_lock(&smi_info->count_lock); | |
636 | smi_info->hosed_count++; | |
637 | spin_unlock(&smi_info->count_lock); | |
638 | ||
639 | /* Do the before return_hosed_msg, because that | |
640 | releases the lock. */ | |
641 | smi_info->si_state = SI_NORMAL; | |
642 | if (smi_info->curr_msg != NULL) { | |
643 | /* If we were handling a user message, format | |
644 | a response to send to the upper layer to | |
645 | tell it about the error. */ | |
646 | return_hosed_msg(smi_info); | |
647 | } | |
648 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
649 | } | |
650 | ||
651 | /* We prefer handling attn over new messages. */ | |
652 | if (si_sm_result == SI_SM_ATTN) | |
653 | { | |
654 | unsigned char msg[2]; | |
655 | ||
656 | spin_lock(&smi_info->count_lock); | |
657 | smi_info->attentions++; | |
658 | spin_unlock(&smi_info->count_lock); | |
659 | ||
660 | /* Got a attn, send down a get message flags to see | |
661 | what's causing it. It would be better to handle | |
662 | this in the upper layer, but due to the way | |
663 | interrupts work with the SMI, that's not really | |
664 | possible. */ | |
665 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
666 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
667 | ||
668 | smi_info->handlers->start_transaction( | |
669 | smi_info->si_sm, msg, 2); | |
670 | smi_info->si_state = SI_GETTING_FLAGS; | |
671 | goto restart; | |
672 | } | |
673 | ||
674 | /* If we are currently idle, try to start the next message. */ | |
675 | if (si_sm_result == SI_SM_IDLE) { | |
676 | spin_lock(&smi_info->count_lock); | |
677 | smi_info->idles++; | |
678 | spin_unlock(&smi_info->count_lock); | |
679 | ||
680 | si_sm_result = start_next_msg(smi_info); | |
681 | if (si_sm_result != SI_SM_IDLE) | |
682 | goto restart; | |
683 | } | |
684 | ||
685 | if ((si_sm_result == SI_SM_IDLE) | |
686 | && (atomic_read(&smi_info->req_events))) | |
687 | { | |
688 | /* We are idle and the upper layer requested that I fetch | |
689 | events, so do so. */ | |
690 | unsigned char msg[2]; | |
691 | ||
692 | spin_lock(&smi_info->count_lock); | |
693 | smi_info->flag_fetches++; | |
694 | spin_unlock(&smi_info->count_lock); | |
695 | ||
696 | atomic_set(&smi_info->req_events, 0); | |
697 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
698 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
699 | ||
700 | smi_info->handlers->start_transaction( | |
701 | smi_info->si_sm, msg, 2); | |
702 | smi_info->si_state = SI_GETTING_FLAGS; | |
703 | goto restart; | |
704 | } | |
705 | ||
706 | return si_sm_result; | |
707 | } | |
708 | ||
709 | static void sender(void *send_info, | |
710 | struct ipmi_smi_msg *msg, | |
711 | int priority) | |
712 | { | |
713 | struct smi_info *smi_info = send_info; | |
714 | enum si_sm_result result; | |
715 | unsigned long flags; | |
716 | #ifdef DEBUG_TIMING | |
717 | struct timeval t; | |
718 | #endif | |
719 | ||
720 | spin_lock_irqsave(&(smi_info->msg_lock), flags); | |
721 | #ifdef DEBUG_TIMING | |
722 | do_gettimeofday(&t); | |
723 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
724 | #endif | |
725 | ||
726 | if (smi_info->run_to_completion) { | |
727 | /* If we are running to completion, then throw it in | |
728 | the list and run transactions until everything is | |
729 | clear. Priority doesn't matter here. */ | |
730 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
731 | ||
732 | /* We have to release the msg lock and claim the smi | |
733 | lock in this case, because of race conditions. */ | |
734 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
735 | ||
736 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
737 | result = smi_event_handler(smi_info, 0); | |
738 | while (result != SI_SM_IDLE) { | |
739 | udelay(SI_SHORT_TIMEOUT_USEC); | |
740 | result = smi_event_handler(smi_info, | |
741 | SI_SHORT_TIMEOUT_USEC); | |
742 | } | |
743 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
744 | return; | |
745 | } else { | |
746 | if (priority > 0) { | |
747 | list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs)); | |
748 | } else { | |
749 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
750 | } | |
751 | } | |
752 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
753 | ||
754 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
755 | if ((smi_info->si_state == SI_NORMAL) | |
756 | && (smi_info->curr_msg == NULL)) | |
757 | { | |
758 | start_next_msg(smi_info); | |
759 | si_restart_short_timer(smi_info); | |
760 | } | |
761 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
762 | } | |
763 | ||
764 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
765 | { | |
766 | struct smi_info *smi_info = send_info; | |
767 | enum si_sm_result result; | |
768 | unsigned long flags; | |
769 | ||
770 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
771 | ||
772 | smi_info->run_to_completion = i_run_to_completion; | |
773 | if (i_run_to_completion) { | |
774 | result = smi_event_handler(smi_info, 0); | |
775 | while (result != SI_SM_IDLE) { | |
776 | udelay(SI_SHORT_TIMEOUT_USEC); | |
777 | result = smi_event_handler(smi_info, | |
778 | SI_SHORT_TIMEOUT_USEC); | |
779 | } | |
780 | } | |
781 | ||
782 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
783 | } | |
784 | ||
a9a2c44f CM |
785 | static int ipmi_thread(void *data) |
786 | { | |
787 | struct smi_info *smi_info = data; | |
e9a705a0 | 788 | unsigned long flags; |
a9a2c44f CM |
789 | enum si_sm_result smi_result; |
790 | ||
a9a2c44f | 791 | set_user_nice(current, 19); |
e9a705a0 | 792 | while (!kthread_should_stop()) { |
a9a2c44f CM |
793 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
794 | smi_result=smi_event_handler(smi_info, 0); | |
795 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
e9a705a0 MD |
796 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
797 | /* do nothing */ | |
a9a2c44f | 798 | } |
e9a705a0 MD |
799 | else if (smi_result == SI_SM_CALL_WITH_DELAY) |
800 | udelay(1); | |
801 | else | |
802 | schedule_timeout_interruptible(1); | |
a9a2c44f | 803 | } |
a9a2c44f CM |
804 | return 0; |
805 | } | |
806 | ||
807 | ||
1da177e4 LT |
808 | static void poll(void *send_info) |
809 | { | |
810 | struct smi_info *smi_info = send_info; | |
811 | ||
812 | smi_event_handler(smi_info, 0); | |
813 | } | |
814 | ||
815 | static void request_events(void *send_info) | |
816 | { | |
817 | struct smi_info *smi_info = send_info; | |
818 | ||
819 | atomic_set(&smi_info->req_events, 1); | |
820 | } | |
821 | ||
822 | static int initialized = 0; | |
823 | ||
824 | /* Must be called with interrupts off and with the si_lock held. */ | |
825 | static void si_restart_short_timer(struct smi_info *smi_info) | |
826 | { | |
827 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
828 | unsigned long flags; | |
829 | unsigned long jiffies_now; | |
75b0768a | 830 | unsigned long seq; |
1da177e4 LT |
831 | |
832 | if (del_timer(&(smi_info->si_timer))) { | |
833 | /* If we don't delete the timer, then it will go off | |
834 | immediately, anyway. So we only process if we | |
835 | actually delete the timer. */ | |
836 | ||
75b0768a CM |
837 | do { |
838 | seq = read_seqbegin_irqsave(&xtime_lock, flags); | |
839 | jiffies_now = jiffies; | |
840 | smi_info->si_timer.expires = jiffies_now; | |
841 | smi_info->si_timer.arch_cycle_expires | |
842 | = get_arch_cycles(jiffies_now); | |
843 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | |
1da177e4 LT |
844 | |
845 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); | |
846 | ||
847 | add_timer(&(smi_info->si_timer)); | |
848 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
849 | smi_info->timeout_restarts++; | |
850 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
851 | } | |
852 | #endif | |
853 | } | |
854 | ||
855 | static void smi_timeout(unsigned long data) | |
856 | { | |
857 | struct smi_info *smi_info = (struct smi_info *) data; | |
858 | enum si_sm_result smi_result; | |
859 | unsigned long flags; | |
860 | unsigned long jiffies_now; | |
c4edff1c | 861 | long time_diff; |
1da177e4 LT |
862 | #ifdef DEBUG_TIMING |
863 | struct timeval t; | |
864 | #endif | |
865 | ||
a9a2c44f | 866 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 | 867 | return; |
1da177e4 LT |
868 | |
869 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
870 | #ifdef DEBUG_TIMING | |
871 | do_gettimeofday(&t); | |
872 | printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
873 | #endif | |
874 | jiffies_now = jiffies; | |
c4edff1c | 875 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
876 | * SI_USEC_PER_JIFFY); |
877 | smi_result = smi_event_handler(smi_info, time_diff); | |
878 | ||
879 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
880 | ||
881 | smi_info->last_timeout_jiffies = jiffies_now; | |
882 | ||
883 | if ((smi_info->irq) && (! smi_info->interrupt_disabled)) { | |
884 | /* Running with interrupts, only do long timeouts. */ | |
885 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
886 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
887 | smi_info->long_timeouts++; | |
888 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
889 | goto do_add_timer; | |
890 | } | |
891 | ||
892 | /* If the state machine asks for a short delay, then shorten | |
893 | the timer timeout. */ | |
894 | if (smi_result == SI_SM_CALL_WITH_DELAY) { | |
75b0768a CM |
895 | #if defined(CONFIG_HIGH_RES_TIMERS) |
896 | unsigned long seq; | |
897 | #endif | |
1da177e4 LT |
898 | spin_lock_irqsave(&smi_info->count_lock, flags); |
899 | smi_info->short_timeouts++; | |
900 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
901 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
75b0768a CM |
902 | do { |
903 | seq = read_seqbegin_irqsave(&xtime_lock, flags); | |
904 | smi_info->si_timer.expires = jiffies; | |
905 | smi_info->si_timer.arch_cycle_expires | |
906 | = get_arch_cycles(smi_info->si_timer.expires); | |
907 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | |
1da177e4 LT |
908 | add_usec_to_timer(&smi_info->si_timer, SI_SHORT_TIMEOUT_USEC); |
909 | #else | |
910 | smi_info->si_timer.expires = jiffies + 1; | |
911 | #endif | |
912 | } else { | |
913 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
914 | smi_info->long_timeouts++; | |
915 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
916 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
917 | #if defined(CONFIG_HIGH_RES_TIMERS) | |
75b0768a | 918 | smi_info->si_timer.arch_cycle_expires = 0; |
1da177e4 LT |
919 | #endif |
920 | } | |
921 | ||
922 | do_add_timer: | |
923 | add_timer(&(smi_info->si_timer)); | |
924 | } | |
925 | ||
926 | static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs) | |
927 | { | |
928 | struct smi_info *smi_info = data; | |
929 | unsigned long flags; | |
930 | #ifdef DEBUG_TIMING | |
931 | struct timeval t; | |
932 | #endif | |
933 | ||
934 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
935 | ||
936 | spin_lock(&smi_info->count_lock); | |
937 | smi_info->interrupts++; | |
938 | spin_unlock(&smi_info->count_lock); | |
939 | ||
a9a2c44f | 940 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
941 | goto out; |
942 | ||
943 | #ifdef DEBUG_TIMING | |
944 | do_gettimeofday(&t); | |
945 | printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
946 | #endif | |
947 | smi_event_handler(smi_info, 0); | |
948 | out: | |
949 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
950 | return IRQ_HANDLED; | |
951 | } | |
952 | ||
9dbf68f9 CM |
953 | static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs) |
954 | { | |
955 | struct smi_info *smi_info = data; | |
956 | /* We need to clear the IRQ flag for the BT interface. */ | |
957 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
958 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
959 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
960 | return si_irq_handler(irq, data, regs); | |
961 | } | |
962 | ||
963 | ||
1da177e4 LT |
964 | static struct ipmi_smi_handlers handlers = |
965 | { | |
966 | .owner = THIS_MODULE, | |
967 | .sender = sender, | |
968 | .request_events = request_events, | |
969 | .set_run_to_completion = set_run_to_completion, | |
970 | .poll = poll, | |
971 | }; | |
972 | ||
973 | /* There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
974 | a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */ | |
975 | ||
976 | #define SI_MAX_PARMS 4 | |
977 | #define SI_MAX_DRIVERS ((SI_MAX_PARMS * 2) + 2) | |
978 | static struct smi_info *smi_infos[SI_MAX_DRIVERS] = | |
979 | { NULL, NULL, NULL, NULL }; | |
980 | ||
981 | #define DEVICE_NAME "ipmi_si" | |
982 | ||
983 | #define DEFAULT_KCS_IO_PORT 0xca2 | |
984 | #define DEFAULT_SMIC_IO_PORT 0xca9 | |
985 | #define DEFAULT_BT_IO_PORT 0xe4 | |
986 | #define DEFAULT_REGSPACING 1 | |
987 | ||
988 | static int si_trydefaults = 1; | |
989 | static char *si_type[SI_MAX_PARMS]; | |
990 | #define MAX_SI_TYPE_STR 30 | |
991 | static char si_type_str[MAX_SI_TYPE_STR]; | |
992 | static unsigned long addrs[SI_MAX_PARMS]; | |
993 | static int num_addrs; | |
994 | static unsigned int ports[SI_MAX_PARMS]; | |
995 | static int num_ports; | |
996 | static int irqs[SI_MAX_PARMS]; | |
997 | static int num_irqs; | |
998 | static int regspacings[SI_MAX_PARMS]; | |
999 | static int num_regspacings = 0; | |
1000 | static int regsizes[SI_MAX_PARMS]; | |
1001 | static int num_regsizes = 0; | |
1002 | static int regshifts[SI_MAX_PARMS]; | |
1003 | static int num_regshifts = 0; | |
1004 | static int slave_addrs[SI_MAX_PARMS]; | |
1005 | static int num_slave_addrs = 0; | |
1006 | ||
1007 | ||
1008 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1009 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1010 | " default scan of the KCS and SMIC interface at the standard" | |
1011 | " address"); | |
1012 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1013 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1014 | " interface separated by commas. The types are 'kcs'," | |
1015 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1016 | " the first interface to kcs and the second to bt"); | |
1017 | module_param_array(addrs, long, &num_addrs, 0); | |
1018 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" | |
1019 | " addresses separated by commas. Only use if an interface" | |
1020 | " is in memory. Otherwise, set it to zero or leave" | |
1021 | " it blank."); | |
1022 | module_param_array(ports, int, &num_ports, 0); | |
1023 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" | |
1024 | " addresses separated by commas. Only use if an interface" | |
1025 | " is a port. Otherwise, set it to zero or leave" | |
1026 | " it blank."); | |
1027 | module_param_array(irqs, int, &num_irqs, 0); | |
1028 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1029 | " addresses separated by commas. Only use if an interface" | |
1030 | " has an interrupt. Otherwise, set it to zero or leave" | |
1031 | " it blank."); | |
1032 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1033 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1034 | " and each successive register used by the interface. For" | |
1035 | " instance, if the start address is 0xca2 and the spacing" | |
1036 | " is 2, then the second address is at 0xca4. Defaults" | |
1037 | " to 1."); | |
1038 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1039 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1040 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1041 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1042 | " the 8-bit IPMI register has to be read from a larger" | |
1043 | " register."); | |
1044 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1045 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1046 | " IPMI register, in bits. For instance, if the data" | |
1047 | " is read from a 32-bit word and the IPMI data is in" | |
1048 | " bit 8-15, then the shift would be 8"); | |
1049 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1050 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1051 | " the controller. Normally this is 0x20, but can be" | |
1052 | " overridden by this parm. This is an array indexed" | |
1053 | " by interface number."); | |
1054 | ||
1055 | ||
1056 | #define IPMI_MEM_ADDR_SPACE 1 | |
1057 | #define IPMI_IO_ADDR_SPACE 2 | |
1058 | ||
8466361a | 1059 | #if defined(CONFIG_ACPI) || defined(CONFIG_X86) || defined(CONFIG_PCI) |
1da177e4 LT |
1060 | static int is_new_interface(int intf, u8 addr_space, unsigned long base_addr) |
1061 | { | |
1062 | int i; | |
1063 | ||
1064 | for (i = 0; i < SI_MAX_PARMS; ++i) { | |
1065 | /* Don't check our address. */ | |
1066 | if (i == intf) | |
1067 | continue; | |
1068 | if (si_type[i] != NULL) { | |
1069 | if ((addr_space == IPMI_MEM_ADDR_SPACE && | |
1070 | base_addr == addrs[i]) || | |
1071 | (addr_space == IPMI_IO_ADDR_SPACE && | |
1072 | base_addr == ports[i])) | |
1073 | return 0; | |
1074 | } | |
1075 | else | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | return 1; | |
1080 | } | |
1081 | #endif | |
1082 | ||
1083 | static int std_irq_setup(struct smi_info *info) | |
1084 | { | |
1085 | int rv; | |
1086 | ||
e8b33617 | 1087 | if (! info->irq) |
1da177e4 LT |
1088 | return 0; |
1089 | ||
9dbf68f9 CM |
1090 | if (info->si_type == SI_BT) { |
1091 | rv = request_irq(info->irq, | |
1092 | si_bt_irq_handler, | |
1093 | SA_INTERRUPT, | |
1094 | DEVICE_NAME, | |
1095 | info); | |
e8b33617 | 1096 | if (! rv) |
9dbf68f9 CM |
1097 | /* Enable the interrupt in the BT interface. */ |
1098 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1099 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1100 | } else | |
1101 | rv = request_irq(info->irq, | |
1102 | si_irq_handler, | |
1103 | SA_INTERRUPT, | |
1104 | DEVICE_NAME, | |
1105 | info); | |
1da177e4 LT |
1106 | if (rv) { |
1107 | printk(KERN_WARNING | |
1108 | "ipmi_si: %s unable to claim interrupt %d," | |
1109 | " running polled\n", | |
1110 | DEVICE_NAME, info->irq); | |
1111 | info->irq = 0; | |
1112 | } else { | |
1113 | printk(" Using irq %d\n", info->irq); | |
1114 | } | |
1115 | ||
1116 | return rv; | |
1117 | } | |
1118 | ||
1119 | static void std_irq_cleanup(struct smi_info *info) | |
1120 | { | |
e8b33617 | 1121 | if (! info->irq) |
1da177e4 LT |
1122 | return; |
1123 | ||
9dbf68f9 CM |
1124 | if (info->si_type == SI_BT) |
1125 | /* Disable the interrupt in the BT interface. */ | |
1126 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1da177e4 LT |
1127 | free_irq(info->irq, info); |
1128 | } | |
1129 | ||
1130 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) | |
1131 | { | |
1132 | unsigned int *addr = io->info; | |
1133 | ||
1134 | return inb((*addr)+(offset*io->regspacing)); | |
1135 | } | |
1136 | ||
1137 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1138 | unsigned char b) | |
1139 | { | |
1140 | unsigned int *addr = io->info; | |
1141 | ||
1142 | outb(b, (*addr)+(offset * io->regspacing)); | |
1143 | } | |
1144 | ||
1145 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1146 | { | |
1147 | unsigned int *addr = io->info; | |
1148 | ||
1149 | return (inw((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff; | |
1150 | } | |
1151 | ||
1152 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1153 | unsigned char b) | |
1154 | { | |
1155 | unsigned int *addr = io->info; | |
1156 | ||
1157 | outw(b << io->regshift, (*addr)+(offset * io->regspacing)); | |
1158 | } | |
1159 | ||
1160 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1161 | { | |
1162 | unsigned int *addr = io->info; | |
1163 | ||
1164 | return (inl((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff; | |
1165 | } | |
1166 | ||
1167 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1168 | unsigned char b) | |
1169 | { | |
1170 | unsigned int *addr = io->info; | |
1171 | ||
1172 | outl(b << io->regshift, (*addr)+(offset * io->regspacing)); | |
1173 | } | |
1174 | ||
1175 | static void port_cleanup(struct smi_info *info) | |
1176 | { | |
1177 | unsigned int *addr = info->io.info; | |
1178 | int mapsize; | |
1179 | ||
1180 | if (addr && (*addr)) { | |
1181 | mapsize = ((info->io_size * info->io.regspacing) | |
1182 | - (info->io.regspacing - info->io.regsize)); | |
1183 | ||
1184 | release_region (*addr, mapsize); | |
1185 | } | |
1186 | kfree(info); | |
1187 | } | |
1188 | ||
1189 | static int port_setup(struct smi_info *info) | |
1190 | { | |
1191 | unsigned int *addr = info->io.info; | |
1192 | int mapsize; | |
1193 | ||
e8b33617 | 1194 | if (! addr || (! *addr)) |
1da177e4 LT |
1195 | return -ENODEV; |
1196 | ||
1197 | info->io_cleanup = port_cleanup; | |
1198 | ||
1199 | /* Figure out the actual inb/inw/inl/etc routine to use based | |
1200 | upon the register size. */ | |
1201 | switch (info->io.regsize) { | |
1202 | case 1: | |
1203 | info->io.inputb = port_inb; | |
1204 | info->io.outputb = port_outb; | |
1205 | break; | |
1206 | case 2: | |
1207 | info->io.inputb = port_inw; | |
1208 | info->io.outputb = port_outw; | |
1209 | break; | |
1210 | case 4: | |
1211 | info->io.inputb = port_inl; | |
1212 | info->io.outputb = port_outl; | |
1213 | break; | |
1214 | default: | |
1215 | printk("ipmi_si: Invalid register size: %d\n", | |
1216 | info->io.regsize); | |
1217 | return -EINVAL; | |
1218 | } | |
1219 | ||
1220 | /* Calculate the total amount of memory to claim. This is an | |
1221 | * unusual looking calculation, but it avoids claiming any | |
1222 | * more memory than it has to. It will claim everything | |
1223 | * between the first address to the end of the last full | |
1224 | * register. */ | |
1225 | mapsize = ((info->io_size * info->io.regspacing) | |
1226 | - (info->io.regspacing - info->io.regsize)); | |
1227 | ||
1228 | if (request_region(*addr, mapsize, DEVICE_NAME) == NULL) | |
1229 | return -EIO; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int try_init_port(int intf_num, struct smi_info **new_info) | |
1234 | { | |
1235 | struct smi_info *info; | |
1236 | ||
e8b33617 | 1237 | if (! ports[intf_num]) |
1da177e4 LT |
1238 | return -ENODEV; |
1239 | ||
e8b33617 | 1240 | if (! is_new_interface(intf_num, IPMI_IO_ADDR_SPACE, |
1da177e4 LT |
1241 | ports[intf_num])) |
1242 | return -ENODEV; | |
1243 | ||
1244 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
e8b33617 | 1245 | if (! info) { |
1da177e4 LT |
1246 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (1)\n"); |
1247 | return -ENOMEM; | |
1248 | } | |
1249 | memset(info, 0, sizeof(*info)); | |
1250 | ||
1251 | info->io_setup = port_setup; | |
1252 | info->io.info = &(ports[intf_num]); | |
1253 | info->io.addr = NULL; | |
1254 | info->io.regspacing = regspacings[intf_num]; | |
e8b33617 | 1255 | if (! info->io.regspacing) |
1da177e4 LT |
1256 | info->io.regspacing = DEFAULT_REGSPACING; |
1257 | info->io.regsize = regsizes[intf_num]; | |
e8b33617 | 1258 | if (! info->io.regsize) |
1da177e4 LT |
1259 | info->io.regsize = DEFAULT_REGSPACING; |
1260 | info->io.regshift = regshifts[intf_num]; | |
1261 | info->irq = 0; | |
1262 | info->irq_setup = NULL; | |
1263 | *new_info = info; | |
1264 | ||
1265 | if (si_type[intf_num] == NULL) | |
1266 | si_type[intf_num] = "kcs"; | |
1267 | ||
1268 | printk("ipmi_si: Trying \"%s\" at I/O port 0x%x\n", | |
1269 | si_type[intf_num], ports[intf_num]); | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | static unsigned char mem_inb(struct si_sm_io *io, unsigned int offset) | |
1274 | { | |
1275 | return readb((io->addr)+(offset * io->regspacing)); | |
1276 | } | |
1277 | ||
1278 | static void mem_outb(struct si_sm_io *io, unsigned int offset, | |
1279 | unsigned char b) | |
1280 | { | |
1281 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1282 | } | |
1283 | ||
1284 | static unsigned char mem_inw(struct si_sm_io *io, unsigned int offset) | |
1285 | { | |
1286 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1287 | && 0xff; | |
1288 | } | |
1289 | ||
1290 | static void mem_outw(struct si_sm_io *io, unsigned int offset, | |
1291 | unsigned char b) | |
1292 | { | |
1293 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1294 | } | |
1295 | ||
1296 | static unsigned char mem_inl(struct si_sm_io *io, unsigned int offset) | |
1297 | { | |
1298 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1299 | && 0xff; | |
1300 | } | |
1301 | ||
1302 | static void mem_outl(struct si_sm_io *io, unsigned int offset, | |
1303 | unsigned char b) | |
1304 | { | |
1305 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1306 | } | |
1307 | ||
1308 | #ifdef readq | |
1309 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1310 | { | |
1311 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
1312 | && 0xff; | |
1313 | } | |
1314 | ||
1315 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1316 | unsigned char b) | |
1317 | { | |
1318 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1319 | } | |
1320 | #endif | |
1321 | ||
1322 | static void mem_cleanup(struct smi_info *info) | |
1323 | { | |
1324 | unsigned long *addr = info->io.info; | |
1325 | int mapsize; | |
1326 | ||
1327 | if (info->io.addr) { | |
1328 | iounmap(info->io.addr); | |
1329 | ||
1330 | mapsize = ((info->io_size * info->io.regspacing) | |
1331 | - (info->io.regspacing - info->io.regsize)); | |
1332 | ||
1333 | release_mem_region(*addr, mapsize); | |
1334 | } | |
1335 | kfree(info); | |
1336 | } | |
1337 | ||
1338 | static int mem_setup(struct smi_info *info) | |
1339 | { | |
1340 | unsigned long *addr = info->io.info; | |
1341 | int mapsize; | |
1342 | ||
e8b33617 | 1343 | if (! addr || (! *addr)) |
1da177e4 LT |
1344 | return -ENODEV; |
1345 | ||
1346 | info->io_cleanup = mem_cleanup; | |
1347 | ||
1348 | /* Figure out the actual readb/readw/readl/etc routine to use based | |
1349 | upon the register size. */ | |
1350 | switch (info->io.regsize) { | |
1351 | case 1: | |
1352 | info->io.inputb = mem_inb; | |
1353 | info->io.outputb = mem_outb; | |
1354 | break; | |
1355 | case 2: | |
1356 | info->io.inputb = mem_inw; | |
1357 | info->io.outputb = mem_outw; | |
1358 | break; | |
1359 | case 4: | |
1360 | info->io.inputb = mem_inl; | |
1361 | info->io.outputb = mem_outl; | |
1362 | break; | |
1363 | #ifdef readq | |
1364 | case 8: | |
1365 | info->io.inputb = mem_inq; | |
1366 | info->io.outputb = mem_outq; | |
1367 | break; | |
1368 | #endif | |
1369 | default: | |
1370 | printk("ipmi_si: Invalid register size: %d\n", | |
1371 | info->io.regsize); | |
1372 | return -EINVAL; | |
1373 | } | |
1374 | ||
1375 | /* Calculate the total amount of memory to claim. This is an | |
1376 | * unusual looking calculation, but it avoids claiming any | |
1377 | * more memory than it has to. It will claim everything | |
1378 | * between the first address to the end of the last full | |
1379 | * register. */ | |
1380 | mapsize = ((info->io_size * info->io.regspacing) | |
1381 | - (info->io.regspacing - info->io.regsize)); | |
1382 | ||
1383 | if (request_mem_region(*addr, mapsize, DEVICE_NAME) == NULL) | |
1384 | return -EIO; | |
1385 | ||
1386 | info->io.addr = ioremap(*addr, mapsize); | |
1387 | if (info->io.addr == NULL) { | |
1388 | release_mem_region(*addr, mapsize); | |
1389 | return -EIO; | |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | static int try_init_mem(int intf_num, struct smi_info **new_info) | |
1395 | { | |
1396 | struct smi_info *info; | |
1397 | ||
e8b33617 | 1398 | if (! addrs[intf_num]) |
1da177e4 LT |
1399 | return -ENODEV; |
1400 | ||
e8b33617 | 1401 | if (! is_new_interface(intf_num, IPMI_MEM_ADDR_SPACE, |
1da177e4 LT |
1402 | addrs[intf_num])) |
1403 | return -ENODEV; | |
1404 | ||
1405 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
e8b33617 | 1406 | if (! info) { |
1da177e4 LT |
1407 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (2)\n"); |
1408 | return -ENOMEM; | |
1409 | } | |
1410 | memset(info, 0, sizeof(*info)); | |
1411 | ||
1412 | info->io_setup = mem_setup; | |
1413 | info->io.info = &addrs[intf_num]; | |
1414 | info->io.addr = NULL; | |
1415 | info->io.regspacing = regspacings[intf_num]; | |
e8b33617 | 1416 | if (! info->io.regspacing) |
1da177e4 LT |
1417 | info->io.regspacing = DEFAULT_REGSPACING; |
1418 | info->io.regsize = regsizes[intf_num]; | |
e8b33617 | 1419 | if (! info->io.regsize) |
1da177e4 LT |
1420 | info->io.regsize = DEFAULT_REGSPACING; |
1421 | info->io.regshift = regshifts[intf_num]; | |
1422 | info->irq = 0; | |
1423 | info->irq_setup = NULL; | |
1424 | *new_info = info; | |
1425 | ||
1426 | if (si_type[intf_num] == NULL) | |
1427 | si_type[intf_num] = "kcs"; | |
1428 | ||
1429 | printk("ipmi_si: Trying \"%s\" at memory address 0x%lx\n", | |
1430 | si_type[intf_num], addrs[intf_num]); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | ||
8466361a | 1435 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1436 | |
1437 | #include <linux/acpi.h> | |
1438 | ||
1439 | /* Once we get an ACPI failure, we don't try any more, because we go | |
1440 | through the tables sequentially. Once we don't find a table, there | |
1441 | are no more. */ | |
1442 | static int acpi_failure = 0; | |
1443 | ||
1444 | /* For GPE-type interrupts. */ | |
1445 | static u32 ipmi_acpi_gpe(void *context) | |
1446 | { | |
1447 | struct smi_info *smi_info = context; | |
1448 | unsigned long flags; | |
1449 | #ifdef DEBUG_TIMING | |
1450 | struct timeval t; | |
1451 | #endif | |
1452 | ||
1453 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1454 | ||
1455 | spin_lock(&smi_info->count_lock); | |
1456 | smi_info->interrupts++; | |
1457 | spin_unlock(&smi_info->count_lock); | |
1458 | ||
a9a2c44f | 1459 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
1460 | goto out; |
1461 | ||
1462 | #ifdef DEBUG_TIMING | |
1463 | do_gettimeofday(&t); | |
1464 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1465 | #endif | |
1466 | smi_event_handler(smi_info, 0); | |
1467 | out: | |
1468 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1469 | ||
1470 | return ACPI_INTERRUPT_HANDLED; | |
1471 | } | |
1472 | ||
1473 | static int acpi_gpe_irq_setup(struct smi_info *info) | |
1474 | { | |
1475 | acpi_status status; | |
1476 | ||
e8b33617 | 1477 | if (! info->irq) |
1da177e4 LT |
1478 | return 0; |
1479 | ||
1480 | /* FIXME - is level triggered right? */ | |
1481 | status = acpi_install_gpe_handler(NULL, | |
1482 | info->irq, | |
1483 | ACPI_GPE_LEVEL_TRIGGERED, | |
1484 | &ipmi_acpi_gpe, | |
1485 | info); | |
1486 | if (status != AE_OK) { | |
1487 | printk(KERN_WARNING | |
1488 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1489 | " running polled\n", | |
1490 | DEVICE_NAME, info->irq); | |
1491 | info->irq = 0; | |
1492 | return -EINVAL; | |
1493 | } else { | |
1494 | printk(" Using ACPI GPE %d\n", info->irq); | |
1495 | return 0; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | static void acpi_gpe_irq_cleanup(struct smi_info *info) | |
1500 | { | |
e8b33617 | 1501 | if (! info->irq) |
1da177e4 LT |
1502 | return; |
1503 | ||
1504 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1505 | } | |
1506 | ||
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 | ||
1549 | static int try_init_acpi(int intf_num, struct smi_info **new_info) | |
1550 | { | |
1551 | struct smi_info *info; | |
1552 | acpi_status status; | |
1553 | struct SPMITable *spmi; | |
1554 | char *io_type; | |
1555 | u8 addr_space; | |
1556 | ||
4fbd1514 YD |
1557 | if (acpi_disabled) |
1558 | return -ENODEV; | |
1559 | ||
1da177e4 LT |
1560 | if (acpi_failure) |
1561 | return -ENODEV; | |
1562 | ||
1563 | status = acpi_get_firmware_table("SPMI", intf_num+1, | |
1564 | ACPI_LOGICAL_ADDRESSING, | |
1565 | (struct acpi_table_header **) &spmi); | |
1566 | if (status != AE_OK) { | |
1567 | acpi_failure = 1; | |
1568 | return -ENODEV; | |
1569 | } | |
1570 | ||
1571 | if (spmi->IPMIlegacy != 1) { | |
1572 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
1573 | return -ENODEV; | |
1574 | } | |
1575 | ||
1576 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
1577 | addr_space = IPMI_MEM_ADDR_SPACE; | |
1578 | else | |
1579 | addr_space = IPMI_IO_ADDR_SPACE; | |
e8b33617 | 1580 | if (! is_new_interface(-1, addr_space, spmi->addr.address)) |
1da177e4 LT |
1581 | return -ENODEV; |
1582 | ||
e8b33617 | 1583 | if (! spmi->addr.register_bit_width) { |
1da177e4 LT |
1584 | acpi_failure = 1; |
1585 | return -ENODEV; | |
1586 | } | |
1587 | ||
1588 | /* Figure out the interface type. */ | |
1589 | switch (spmi->InterfaceType) | |
1590 | { | |
1591 | case 1: /* KCS */ | |
1592 | si_type[intf_num] = "kcs"; | |
1593 | break; | |
1594 | ||
1595 | case 2: /* SMIC */ | |
1596 | si_type[intf_num] = "smic"; | |
1597 | break; | |
1598 | ||
1599 | case 3: /* BT */ | |
1600 | si_type[intf_num] = "bt"; | |
1601 | break; | |
1602 | ||
1603 | default: | |
1604 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
1605 | spmi->InterfaceType); | |
1606 | return -EIO; | |
1607 | } | |
1608 | ||
1609 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
e8b33617 | 1610 | if (! info) { |
1da177e4 LT |
1611 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); |
1612 | return -ENOMEM; | |
1613 | } | |
1614 | memset(info, 0, sizeof(*info)); | |
1615 | ||
1616 | if (spmi->InterruptType & 1) { | |
1617 | /* We've got a GPE interrupt. */ | |
1618 | info->irq = spmi->GPE; | |
1619 | info->irq_setup = acpi_gpe_irq_setup; | |
1620 | info->irq_cleanup = acpi_gpe_irq_cleanup; | |
1621 | } else if (spmi->InterruptType & 2) { | |
1622 | /* We've got an APIC/SAPIC interrupt. */ | |
1623 | info->irq = spmi->GlobalSystemInterrupt; | |
1624 | info->irq_setup = std_irq_setup; | |
1625 | info->irq_cleanup = std_irq_cleanup; | |
1626 | } else { | |
1627 | /* Use the default interrupt setting. */ | |
1628 | info->irq = 0; | |
1629 | info->irq_setup = NULL; | |
1630 | } | |
1631 | ||
35bc37a0 CM |
1632 | if (spmi->addr.register_bit_width) { |
1633 | /* A (hopefully) properly formed register bit width. */ | |
1634 | regspacings[intf_num] = spmi->addr.register_bit_width / 8; | |
1635 | info->io.regspacing = spmi->addr.register_bit_width / 8; | |
1636 | } else { | |
1637 | /* Some broken systems get this wrong and set the value | |
1638 | * to zero. Assume it is the default spacing. If that | |
1639 | * is wrong, too bad, the vendor should fix the tables. */ | |
1640 | regspacings[intf_num] = DEFAULT_REGSPACING; | |
1641 | info->io.regspacing = DEFAULT_REGSPACING; | |
1642 | } | |
1da177e4 LT |
1643 | regsizes[intf_num] = regspacings[intf_num]; |
1644 | info->io.regsize = regsizes[intf_num]; | |
1645 | regshifts[intf_num] = spmi->addr.register_bit_offset; | |
1646 | info->io.regshift = regshifts[intf_num]; | |
1647 | ||
1648 | if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { | |
1649 | io_type = "memory"; | |
1650 | info->io_setup = mem_setup; | |
1651 | addrs[intf_num] = spmi->addr.address; | |
1652 | info->io.info = &(addrs[intf_num]); | |
1653 | } else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) { | |
1654 | io_type = "I/O"; | |
1655 | info->io_setup = port_setup; | |
1656 | ports[intf_num] = spmi->addr.address; | |
1657 | info->io.info = &(ports[intf_num]); | |
1658 | } else { | |
1659 | kfree(info); | |
1660 | printk("ipmi_si: Unknown ACPI I/O Address type\n"); | |
1661 | return -EIO; | |
1662 | } | |
1663 | ||
1664 | *new_info = info; | |
1665 | ||
1666 | printk("ipmi_si: ACPI/SPMI specifies \"%s\" %s SI @ 0x%lx\n", | |
1667 | si_type[intf_num], io_type, (unsigned long) spmi->addr.address); | |
1668 | return 0; | |
1669 | } | |
1670 | #endif | |
1671 | ||
1672 | #ifdef CONFIG_X86 | |
1673 | typedef struct dmi_ipmi_data | |
1674 | { | |
1675 | u8 type; | |
1676 | u8 addr_space; | |
1677 | unsigned long base_addr; | |
1678 | u8 irq; | |
1679 | u8 offset; | |
1680 | u8 slave_addr; | |
1681 | } dmi_ipmi_data_t; | |
1682 | ||
1683 | static dmi_ipmi_data_t dmi_data[SI_MAX_DRIVERS]; | |
1684 | static int dmi_data_entries; | |
1685 | ||
b224cd3a | 1686 | static int __init decode_dmi(struct dmi_header *dm, int intf_num) |
1da177e4 | 1687 | { |
e8b33617 | 1688 | u8 *data = (u8 *)dm; |
1da177e4 LT |
1689 | unsigned long base_addr; |
1690 | u8 reg_spacing; | |
b224cd3a | 1691 | u8 len = dm->length; |
1da177e4 LT |
1692 | dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num; |
1693 | ||
b224cd3a | 1694 | ipmi_data->type = data[4]; |
1da177e4 LT |
1695 | |
1696 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
1697 | if (len >= 0x11) { | |
1698 | if (base_addr & 1) { | |
1699 | /* I/O */ | |
1700 | base_addr &= 0xFFFE; | |
1701 | ipmi_data->addr_space = IPMI_IO_ADDR_SPACE; | |
1702 | } | |
1703 | else { | |
1704 | /* Memory */ | |
1705 | ipmi_data->addr_space = IPMI_MEM_ADDR_SPACE; | |
1706 | } | |
1707 | /* If bit 4 of byte 0x10 is set, then the lsb for the address | |
1708 | is odd. */ | |
b224cd3a | 1709 | ipmi_data->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 1710 | |
b224cd3a | 1711 | ipmi_data->irq = data[0x11]; |
1da177e4 LT |
1712 | |
1713 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 1714 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
1da177e4 LT |
1715 | switch(reg_spacing){ |
1716 | case 0x00: /* Byte boundaries */ | |
1717 | ipmi_data->offset = 1; | |
1718 | break; | |
1719 | case 0x01: /* 32-bit boundaries */ | |
1720 | ipmi_data->offset = 4; | |
1721 | break; | |
1722 | case 0x02: /* 16-byte boundaries */ | |
1723 | ipmi_data->offset = 16; | |
1724 | break; | |
1725 | default: | |
1726 | /* Some other interface, just ignore it. */ | |
1727 | return -EIO; | |
1728 | } | |
1729 | } else { | |
1730 | /* Old DMI spec. */ | |
92068801 CM |
1731 | /* Note that technically, the lower bit of the base |
1732 | * address should be 1 if the address is I/O and 0 if | |
1733 | * the address is in memory. So many systems get that | |
1734 | * wrong (and all that I have seen are I/O) so we just | |
1735 | * ignore that bit and assume I/O. Systems that use | |
1736 | * memory should use the newer spec, anyway. */ | |
1737 | ipmi_data->base_addr = base_addr & 0xfffe; | |
1da177e4 LT |
1738 | ipmi_data->addr_space = IPMI_IO_ADDR_SPACE; |
1739 | ipmi_data->offset = 1; | |
1740 | } | |
1741 | ||
b224cd3a | 1742 | ipmi_data->slave_addr = data[6]; |
1da177e4 LT |
1743 | |
1744 | if (is_new_interface(-1, ipmi_data->addr_space,ipmi_data->base_addr)) { | |
1745 | dmi_data_entries++; | |
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | memset(ipmi_data, 0, sizeof(dmi_ipmi_data_t)); | |
1750 | ||
1751 | return -1; | |
1752 | } | |
1753 | ||
b224cd3a | 1754 | static void __init dmi_find_bmc(void) |
1da177e4 | 1755 | { |
b224cd3a | 1756 | struct dmi_device *dev = NULL; |
1da177e4 LT |
1757 | int intf_num = 0; |
1758 | ||
b224cd3a AP |
1759 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { |
1760 | if (intf_num >= SI_MAX_DRIVERS) | |
1761 | break; | |
1da177e4 | 1762 | |
b224cd3a | 1763 | decode_dmi((struct dmi_header *) dev->device_data, intf_num++); |
1da177e4 | 1764 | } |
1da177e4 LT |
1765 | } |
1766 | ||
1767 | static int try_init_smbios(int intf_num, struct smi_info **new_info) | |
1768 | { | |
e8b33617 CM |
1769 | struct smi_info *info; |
1770 | dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num; | |
1771 | char *io_type; | |
1da177e4 LT |
1772 | |
1773 | if (intf_num >= dmi_data_entries) | |
1774 | return -ENODEV; | |
1775 | ||
e8b33617 | 1776 | switch (ipmi_data->type) { |
1da177e4 LT |
1777 | case 0x01: /* KCS */ |
1778 | si_type[intf_num] = "kcs"; | |
1779 | break; | |
1780 | case 0x02: /* SMIC */ | |
1781 | si_type[intf_num] = "smic"; | |
1782 | break; | |
1783 | case 0x03: /* BT */ | |
1784 | si_type[intf_num] = "bt"; | |
1785 | break; | |
1786 | default: | |
1787 | return -EIO; | |
1788 | } | |
1789 | ||
1790 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
e8b33617 | 1791 | if (! info) { |
1da177e4 LT |
1792 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (4)\n"); |
1793 | return -ENOMEM; | |
1794 | } | |
1795 | memset(info, 0, sizeof(*info)); | |
1796 | ||
1797 | if (ipmi_data->addr_space == 1) { | |
1798 | io_type = "memory"; | |
1799 | info->io_setup = mem_setup; | |
1800 | addrs[intf_num] = ipmi_data->base_addr; | |
1801 | info->io.info = &(addrs[intf_num]); | |
1802 | } else if (ipmi_data->addr_space == 2) { | |
1803 | io_type = "I/O"; | |
1804 | info->io_setup = port_setup; | |
1805 | ports[intf_num] = ipmi_data->base_addr; | |
1806 | info->io.info = &(ports[intf_num]); | |
1807 | } else { | |
1808 | kfree(info); | |
1809 | printk("ipmi_si: Unknown SMBIOS I/O Address type.\n"); | |
1810 | return -EIO; | |
1811 | } | |
1812 | ||
1813 | regspacings[intf_num] = ipmi_data->offset; | |
1814 | info->io.regspacing = regspacings[intf_num]; | |
e8b33617 | 1815 | if (! info->io.regspacing) |
1da177e4 LT |
1816 | info->io.regspacing = DEFAULT_REGSPACING; |
1817 | info->io.regsize = DEFAULT_REGSPACING; | |
1818 | info->io.regshift = regshifts[intf_num]; | |
1819 | ||
1820 | info->slave_addr = ipmi_data->slave_addr; | |
1821 | ||
1822 | irqs[intf_num] = ipmi_data->irq; | |
1823 | ||
1824 | *new_info = info; | |
1825 | ||
1826 | printk("ipmi_si: Found SMBIOS-specified state machine at %s" | |
1827 | " address 0x%lx, slave address 0x%x\n", | |
1828 | io_type, (unsigned long)ipmi_data->base_addr, | |
1829 | ipmi_data->slave_addr); | |
1830 | return 0; | |
1831 | } | |
1832 | #endif /* CONFIG_X86 */ | |
1833 | ||
1834 | #ifdef CONFIG_PCI | |
1835 | ||
1836 | #define PCI_ERMC_CLASSCODE 0x0C0700 | |
1837 | #define PCI_HP_VENDOR_ID 0x103C | |
1838 | #define PCI_MMC_DEVICE_ID 0x121A | |
1839 | #define PCI_MMC_ADDR_CW 0x10 | |
1840 | ||
1841 | /* Avoid more than one attempt to probe pci smic. */ | |
1842 | static int pci_smic_checked = 0; | |
1843 | ||
1844 | static int find_pci_smic(int intf_num, struct smi_info **new_info) | |
1845 | { | |
1846 | struct smi_info *info; | |
1847 | int error; | |
1848 | struct pci_dev *pci_dev = NULL; | |
1849 | u16 base_addr; | |
1850 | int fe_rmc = 0; | |
1851 | ||
1852 | if (pci_smic_checked) | |
1853 | return -ENODEV; | |
1854 | ||
1855 | pci_smic_checked = 1; | |
1856 | ||
e8b33617 CM |
1857 | pci_dev = pci_get_device(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID, NULL); |
1858 | if (! pci_dev) { | |
1859 | pci_dev = pci_get_class(PCI_ERMC_CLASSCODE, NULL); | |
1860 | if (pci_dev && (pci_dev->subsystem_vendor == PCI_HP_VENDOR_ID)) | |
1861 | fe_rmc = 1; | |
1862 | else | |
1863 | return -ENODEV; | |
1864 | } | |
1da177e4 LT |
1865 | |
1866 | error = pci_read_config_word(pci_dev, PCI_MMC_ADDR_CW, &base_addr); | |
1867 | if (error) | |
1868 | { | |
1869 | pci_dev_put(pci_dev); | |
1870 | printk(KERN_ERR | |
1871 | "ipmi_si: pci_read_config_word() failed (%d).\n", | |
1872 | error); | |
1873 | return -ENODEV; | |
1874 | } | |
1875 | ||
1876 | /* Bit 0: 1 specifies programmed I/O, 0 specifies memory mapped I/O */ | |
e8b33617 | 1877 | if (! (base_addr & 0x0001)) |
1da177e4 LT |
1878 | { |
1879 | pci_dev_put(pci_dev); | |
1880 | printk(KERN_ERR | |
1881 | "ipmi_si: memory mapped I/O not supported for PCI" | |
1882 | " smic.\n"); | |
1883 | return -ENODEV; | |
1884 | } | |
1885 | ||
1886 | base_addr &= 0xFFFE; | |
e8b33617 | 1887 | if (! fe_rmc) |
1da177e4 LT |
1888 | /* Data register starts at base address + 1 in eRMC */ |
1889 | ++base_addr; | |
1890 | ||
e8b33617 | 1891 | if (! is_new_interface(-1, IPMI_IO_ADDR_SPACE, base_addr)) { |
1da177e4 LT |
1892 | pci_dev_put(pci_dev); |
1893 | return -ENODEV; | |
1894 | } | |
1895 | ||
1896 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
e8b33617 | 1897 | if (! info) { |
1da177e4 LT |
1898 | pci_dev_put(pci_dev); |
1899 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (5)\n"); | |
1900 | return -ENOMEM; | |
1901 | } | |
1902 | memset(info, 0, sizeof(*info)); | |
1903 | ||
1904 | info->io_setup = port_setup; | |
1905 | ports[intf_num] = base_addr; | |
1906 | info->io.info = &(ports[intf_num]); | |
1907 | info->io.regspacing = regspacings[intf_num]; | |
e8b33617 | 1908 | if (! info->io.regspacing) |
1da177e4 LT |
1909 | info->io.regspacing = DEFAULT_REGSPACING; |
1910 | info->io.regsize = DEFAULT_REGSPACING; | |
1911 | info->io.regshift = regshifts[intf_num]; | |
1912 | ||
1913 | *new_info = info; | |
1914 | ||
1915 | irqs[intf_num] = pci_dev->irq; | |
1916 | si_type[intf_num] = "smic"; | |
1917 | ||
1918 | printk("ipmi_si: Found PCI SMIC at I/O address 0x%lx\n", | |
1919 | (long unsigned int) base_addr); | |
1920 | ||
1921 | pci_dev_put(pci_dev); | |
1922 | return 0; | |
1923 | } | |
1924 | #endif /* CONFIG_PCI */ | |
1925 | ||
1926 | static int try_init_plug_and_play(int intf_num, struct smi_info **new_info) | |
1927 | { | |
1928 | #ifdef CONFIG_PCI | |
e8b33617 | 1929 | if (find_pci_smic(intf_num, new_info) == 0) |
1da177e4 LT |
1930 | return 0; |
1931 | #endif | |
1932 | /* Include other methods here. */ | |
1933 | ||
1934 | return -ENODEV; | |
1935 | } | |
1936 | ||
1937 | ||
1938 | static int try_get_dev_id(struct smi_info *smi_info) | |
1939 | { | |
1940 | unsigned char msg[2]; | |
1941 | unsigned char *resp; | |
1942 | unsigned long resp_len; | |
1943 | enum si_sm_result smi_result; | |
1944 | int rv = 0; | |
1945 | ||
1946 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
e8b33617 | 1947 | if (! resp) |
1da177e4 LT |
1948 | return -ENOMEM; |
1949 | ||
1950 | /* Do a Get Device ID command, since it comes back with some | |
1951 | useful info. */ | |
1952 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1953 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
1954 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1955 | ||
1956 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
1957 | for (;;) | |
1958 | { | |
c3e7e791 CM |
1959 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
1960 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 1961 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
1962 | smi_result = smi_info->handlers->event( |
1963 | smi_info->si_sm, 100); | |
1964 | } | |
1965 | else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) | |
1966 | { | |
1967 | smi_result = smi_info->handlers->event( | |
1968 | smi_info->si_sm, 0); | |
1969 | } | |
1970 | else | |
1971 | break; | |
1972 | } | |
1973 | if (smi_result == SI_SM_HOSED) { | |
1974 | /* We couldn't get the state machine to run, so whatever's at | |
1975 | the port is probably not an IPMI SMI interface. */ | |
1976 | rv = -ENODEV; | |
1977 | goto out; | |
1978 | } | |
1979 | ||
1980 | /* Otherwise, we got some data. */ | |
1981 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1982 | resp, IPMI_MAX_MSG_LENGTH); | |
1983 | if (resp_len < 6) { | |
1984 | /* That's odd, it should be longer. */ | |
1985 | rv = -EINVAL; | |
1986 | goto out; | |
1987 | } | |
1988 | ||
1989 | if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) { | |
1990 | /* That's odd, it shouldn't be able to fail. */ | |
1991 | rv = -EINVAL; | |
1992 | goto out; | |
1993 | } | |
1994 | ||
1995 | /* Record info from the get device id, in case we need it. */ | |
3ae0e0f9 CM |
1996 | memcpy(&smi_info->device_id, &resp[3], |
1997 | min_t(unsigned long, resp_len-3, sizeof(smi_info->device_id))); | |
1da177e4 LT |
1998 | |
1999 | out: | |
2000 | kfree(resp); | |
2001 | return rv; | |
2002 | } | |
2003 | ||
2004 | static int type_file_read_proc(char *page, char **start, off_t off, | |
2005 | int count, int *eof, void *data) | |
2006 | { | |
2007 | char *out = (char *) page; | |
2008 | struct smi_info *smi = data; | |
2009 | ||
2010 | switch (smi->si_type) { | |
2011 | case SI_KCS: | |
2012 | return sprintf(out, "kcs\n"); | |
2013 | case SI_SMIC: | |
2014 | return sprintf(out, "smic\n"); | |
2015 | case SI_BT: | |
2016 | return sprintf(out, "bt\n"); | |
2017 | default: | |
2018 | return 0; | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2023 | int count, int *eof, void *data) | |
2024 | { | |
2025 | char *out = (char *) page; | |
2026 | struct smi_info *smi = data; | |
2027 | ||
2028 | out += sprintf(out, "interrupts_enabled: %d\n", | |
e8b33617 | 2029 | smi->irq && ! smi->interrupt_disabled); |
1da177e4 LT |
2030 | out += sprintf(out, "short_timeouts: %ld\n", |
2031 | smi->short_timeouts); | |
2032 | out += sprintf(out, "long_timeouts: %ld\n", | |
2033 | smi->long_timeouts); | |
2034 | out += sprintf(out, "timeout_restarts: %ld\n", | |
2035 | smi->timeout_restarts); | |
2036 | out += sprintf(out, "idles: %ld\n", | |
2037 | smi->idles); | |
2038 | out += sprintf(out, "interrupts: %ld\n", | |
2039 | smi->interrupts); | |
2040 | out += sprintf(out, "attentions: %ld\n", | |
2041 | smi->attentions); | |
2042 | out += sprintf(out, "flag_fetches: %ld\n", | |
2043 | smi->flag_fetches); | |
2044 | out += sprintf(out, "hosed_count: %ld\n", | |
2045 | smi->hosed_count); | |
2046 | out += sprintf(out, "complete_transactions: %ld\n", | |
2047 | smi->complete_transactions); | |
2048 | out += sprintf(out, "events: %ld\n", | |
2049 | smi->events); | |
2050 | out += sprintf(out, "watchdog_pretimeouts: %ld\n", | |
2051 | smi->watchdog_pretimeouts); | |
2052 | out += sprintf(out, "incoming_messages: %ld\n", | |
2053 | smi->incoming_messages); | |
2054 | ||
2055 | return (out - ((char *) page)); | |
2056 | } | |
2057 | ||
3ae0e0f9 CM |
2058 | /* |
2059 | * oem_data_avail_to_receive_msg_avail | |
2060 | * @info - smi_info structure with msg_flags set | |
2061 | * | |
2062 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2063 | * Returns 1 indicating need to re-run handle_flags(). | |
2064 | */ | |
2065 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2066 | { | |
e8b33617 CM |
2067 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
2068 | RECEIVE_MSG_AVAIL); | |
3ae0e0f9 CM |
2069 | return 1; |
2070 | } | |
2071 | ||
2072 | /* | |
2073 | * setup_dell_poweredge_oem_data_handler | |
2074 | * @info - smi_info.device_id must be populated | |
2075 | * | |
2076 | * Systems that match, but have firmware version < 1.40 may assert | |
2077 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2078 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2079 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2080 | * as RECEIVE_MSG_AVAIL instead. | |
2081 | * | |
2082 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2083 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2084 | * change to handle that properly, we don't actually check for the | |
2085 | * firmware version. | |
2086 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2087 | * Device Revision = 0x80 | |
2088 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2089 | * Firmware Revision2 = 0x40 BCD encoded | |
2090 | * IPMI Version = 0x51 IPMI 1.5 | |
2091 | * Manufacturer ID = A2 02 00 Dell IANA | |
2092 | * | |
d5a2b89a CM |
2093 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2094 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2095 | * | |
3ae0e0f9 CM |
2096 | */ |
2097 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2098 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2099 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
2100 | #define DELL_IANA_MFR_ID {0xA2, 0x02, 0x00} | |
2101 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) | |
2102 | { | |
2103 | struct ipmi_device_id *id = &smi_info->device_id; | |
2104 | const char mfr[3]=DELL_IANA_MFR_ID; | |
d5a2b89a CM |
2105 | if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr))) { |
2106 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && | |
2107 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
2108 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { | |
2109 | smi_info->oem_data_avail_handler = | |
2110 | oem_data_avail_to_receive_msg_avail; | |
2111 | } | |
2112 | else if (ipmi_version_major(id) < 1 || | |
2113 | (ipmi_version_major(id) == 1 && | |
2114 | ipmi_version_minor(id) < 5)) { | |
2115 | smi_info->oem_data_avail_handler = | |
2116 | oem_data_avail_to_receive_msg_avail; | |
2117 | } | |
3ae0e0f9 CM |
2118 | } |
2119 | } | |
2120 | ||
ea94027b CM |
2121 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2122 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2123 | { | |
2124 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2125 | ||
2126 | /* Make it a reponse */ | |
2127 | msg->rsp[0] = msg->data[0] | 4; | |
2128 | msg->rsp[1] = msg->data[1]; | |
2129 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2130 | msg->rsp_size = 3; | |
2131 | smi_info->curr_msg = NULL; | |
2132 | deliver_recv_msg(smi_info, msg); | |
2133 | } | |
2134 | ||
2135 | /* | |
2136 | * dell_poweredge_bt_xaction_handler | |
2137 | * @info - smi_info.device_id must be populated | |
2138 | * | |
2139 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2140 | * not respond to a Get SDR command if the length of the data | |
2141 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2142 | * data returned. This intercepts such commands, and causes userspace | |
2143 | * callers to try again with a different-sized buffer, which succeeds. | |
2144 | */ | |
2145 | ||
2146 | #define STORAGE_NETFN 0x0A | |
2147 | #define STORAGE_CMD_GET_SDR 0x23 | |
2148 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2149 | unsigned long unused, | |
2150 | void *in) | |
2151 | { | |
2152 | struct smi_info *smi_info = in; | |
2153 | unsigned char *data = smi_info->curr_msg->data; | |
2154 | unsigned int size = smi_info->curr_msg->data_size; | |
2155 | if (size >= 8 && | |
2156 | (data[0]>>2) == STORAGE_NETFN && | |
2157 | data[1] == STORAGE_CMD_GET_SDR && | |
2158 | data[7] == 0x3A) { | |
2159 | return_hosed_msg_badsize(smi_info); | |
2160 | return NOTIFY_STOP; | |
2161 | } | |
2162 | return NOTIFY_DONE; | |
2163 | } | |
2164 | ||
2165 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2166 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2167 | }; | |
2168 | ||
2169 | /* | |
2170 | * setup_dell_poweredge_bt_xaction_handler | |
2171 | * @info - smi_info.device_id must be filled in already | |
2172 | * | |
2173 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2174 | * when we know what function to use there. | |
2175 | */ | |
2176 | static void | |
2177 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2178 | { | |
2179 | struct ipmi_device_id *id = &smi_info->device_id; | |
2180 | const char mfr[3]=DELL_IANA_MFR_ID; | |
2181 | if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr)) && | |
2182 | smi_info->si_type == SI_BT) | |
2183 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2184 | } | |
2185 | ||
3ae0e0f9 CM |
2186 | /* |
2187 | * setup_oem_data_handler | |
2188 | * @info - smi_info.device_id must be filled in already | |
2189 | * | |
2190 | * Fills in smi_info.device_id.oem_data_available_handler | |
2191 | * when we know what function to use there. | |
2192 | */ | |
2193 | ||
2194 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2195 | { | |
2196 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2197 | } | |
2198 | ||
ea94027b CM |
2199 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2200 | { | |
2201 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2202 | } | |
2203 | ||
a9a2c44f CM |
2204 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2205 | { | |
44f080c4 | 2206 | if (smi_info->thread != NULL && smi_info->thread != ERR_PTR(-ENOMEM)) |
e9a705a0 | 2207 | kthread_stop(smi_info->thread); |
a9a2c44f CM |
2208 | del_timer_sync(&smi_info->si_timer); |
2209 | } | |
2210 | ||
1da177e4 LT |
2211 | /* Returns 0 if initialized, or negative on an error. */ |
2212 | static int init_one_smi(int intf_num, struct smi_info **smi) | |
2213 | { | |
2214 | int rv; | |
2215 | struct smi_info *new_smi; | |
2216 | ||
2217 | ||
2218 | rv = try_init_mem(intf_num, &new_smi); | |
2219 | if (rv) | |
2220 | rv = try_init_port(intf_num, &new_smi); | |
8466361a | 2221 | #ifdef CONFIG_ACPI |
e8b33617 | 2222 | if (rv && si_trydefaults) |
1da177e4 | 2223 | rv = try_init_acpi(intf_num, &new_smi); |
1da177e4 LT |
2224 | #endif |
2225 | #ifdef CONFIG_X86 | |
e8b33617 | 2226 | if (rv && si_trydefaults) |
1da177e4 | 2227 | rv = try_init_smbios(intf_num, &new_smi); |
1da177e4 | 2228 | #endif |
e8b33617 | 2229 | if (rv && si_trydefaults) |
1da177e4 | 2230 | rv = try_init_plug_and_play(intf_num, &new_smi); |
1da177e4 LT |
2231 | |
2232 | if (rv) | |
2233 | return rv; | |
2234 | ||
2235 | /* So we know not to free it unless we have allocated one. */ | |
2236 | new_smi->intf = NULL; | |
2237 | new_smi->si_sm = NULL; | |
2238 | new_smi->handlers = NULL; | |
2239 | ||
e8b33617 | 2240 | if (! new_smi->irq_setup) { |
1da177e4 LT |
2241 | new_smi->irq = irqs[intf_num]; |
2242 | new_smi->irq_setup = std_irq_setup; | |
2243 | new_smi->irq_cleanup = std_irq_cleanup; | |
2244 | } | |
2245 | ||
2246 | /* Default to KCS if no type is specified. */ | |
2247 | if (si_type[intf_num] == NULL) { | |
2248 | if (si_trydefaults) | |
2249 | si_type[intf_num] = "kcs"; | |
2250 | else { | |
2251 | rv = -EINVAL; | |
2252 | goto out_err; | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | /* Set up the state machine to use. */ | |
2257 | if (strcmp(si_type[intf_num], "kcs") == 0) { | |
2258 | new_smi->handlers = &kcs_smi_handlers; | |
2259 | new_smi->si_type = SI_KCS; | |
2260 | } else if (strcmp(si_type[intf_num], "smic") == 0) { | |
2261 | new_smi->handlers = &smic_smi_handlers; | |
2262 | new_smi->si_type = SI_SMIC; | |
2263 | } else if (strcmp(si_type[intf_num], "bt") == 0) { | |
2264 | new_smi->handlers = &bt_smi_handlers; | |
2265 | new_smi->si_type = SI_BT; | |
2266 | } else { | |
2267 | /* No support for anything else yet. */ | |
2268 | rv = -EIO; | |
2269 | goto out_err; | |
2270 | } | |
2271 | ||
2272 | /* Allocate the state machine's data and initialize it. */ | |
2273 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
e8b33617 | 2274 | if (! new_smi->si_sm) { |
1da177e4 LT |
2275 | printk(" Could not allocate state machine memory\n"); |
2276 | rv = -ENOMEM; | |
2277 | goto out_err; | |
2278 | } | |
2279 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
2280 | &new_smi->io); | |
2281 | ||
2282 | /* Now that we know the I/O size, we can set up the I/O. */ | |
2283 | rv = new_smi->io_setup(new_smi); | |
2284 | if (rv) { | |
2285 | printk(" Could not set up I/O space\n"); | |
2286 | goto out_err; | |
2287 | } | |
2288 | ||
2289 | spin_lock_init(&(new_smi->si_lock)); | |
2290 | spin_lock_init(&(new_smi->msg_lock)); | |
2291 | spin_lock_init(&(new_smi->count_lock)); | |
2292 | ||
2293 | /* Do low-level detection first. */ | |
2294 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
2295 | rv = -ENODEV; | |
2296 | goto out_err; | |
2297 | } | |
2298 | ||
2299 | /* Attempt a get device id command. If it fails, we probably | |
2300 | don't have a SMI here. */ | |
2301 | rv = try_get_dev_id(new_smi); | |
2302 | if (rv) | |
2303 | goto out_err; | |
2304 | ||
3ae0e0f9 | 2305 | setup_oem_data_handler(new_smi); |
ea94027b | 2306 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 2307 | |
1da177e4 LT |
2308 | /* Try to claim any interrupts. */ |
2309 | new_smi->irq_setup(new_smi); | |
2310 | ||
2311 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); | |
2312 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
2313 | new_smi->curr_msg = NULL; | |
2314 | atomic_set(&new_smi->req_events, 0); | |
2315 | new_smi->run_to_completion = 0; | |
2316 | ||
2317 | new_smi->interrupt_disabled = 0; | |
a9a2c44f CM |
2318 | atomic_set(&new_smi->stop_operation, 0); |
2319 | new_smi->intf_num = intf_num; | |
1da177e4 LT |
2320 | |
2321 | /* Start clearing the flags before we enable interrupts or the | |
2322 | timer to avoid racing with the timer. */ | |
2323 | start_clear_flags(new_smi); | |
2324 | /* IRQ is defined to be set when non-zero. */ | |
2325 | if (new_smi->irq) | |
2326 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
2327 | ||
2328 | /* The ipmi_register_smi() code does some operations to | |
2329 | determine the channel information, so we must be ready to | |
2330 | handle operations before it is called. This means we have | |
2331 | to stop the timer if we get an error after this point. */ | |
2332 | init_timer(&(new_smi->si_timer)); | |
2333 | new_smi->si_timer.data = (long) new_smi; | |
2334 | new_smi->si_timer.function = smi_timeout; | |
2335 | new_smi->last_timeout_jiffies = jiffies; | |
2336 | new_smi->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
a9a2c44f | 2337 | |
1da177e4 | 2338 | add_timer(&(new_smi->si_timer)); |
e9a705a0 MD |
2339 | if (new_smi->si_type != SI_BT) |
2340 | new_smi->thread = kthread_run(ipmi_thread, new_smi, | |
2341 | "kipmi%d", new_smi->intf_num); | |
1da177e4 LT |
2342 | |
2343 | rv = ipmi_register_smi(&handlers, | |
2344 | new_smi, | |
3ae0e0f9 CM |
2345 | ipmi_version_major(&new_smi->device_id), |
2346 | ipmi_version_minor(&new_smi->device_id), | |
1da177e4 LT |
2347 | new_smi->slave_addr, |
2348 | &(new_smi->intf)); | |
2349 | if (rv) { | |
2350 | printk(KERN_ERR | |
2351 | "ipmi_si: Unable to register device: error %d\n", | |
2352 | rv); | |
2353 | goto out_err_stop_timer; | |
2354 | } | |
2355 | ||
2356 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
2357 | type_file_read_proc, NULL, | |
2358 | new_smi, THIS_MODULE); | |
2359 | if (rv) { | |
2360 | printk(KERN_ERR | |
2361 | "ipmi_si: Unable to create proc entry: %d\n", | |
2362 | rv); | |
2363 | goto out_err_stop_timer; | |
2364 | } | |
2365 | ||
2366 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
2367 | stat_file_read_proc, NULL, | |
2368 | new_smi, THIS_MODULE); | |
2369 | if (rv) { | |
2370 | printk(KERN_ERR | |
2371 | "ipmi_si: Unable to create proc entry: %d\n", | |
2372 | rv); | |
2373 | goto out_err_stop_timer; | |
2374 | } | |
2375 | ||
2376 | *smi = new_smi; | |
2377 | ||
2378 | printk(" IPMI %s interface initialized\n", si_type[intf_num]); | |
2379 | ||
2380 | return 0; | |
2381 | ||
2382 | out_err_stop_timer: | |
a9a2c44f CM |
2383 | atomic_inc(&new_smi->stop_operation); |
2384 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
2385 | |
2386 | out_err: | |
2387 | if (new_smi->intf) | |
2388 | ipmi_unregister_smi(new_smi->intf); | |
2389 | ||
2390 | new_smi->irq_cleanup(new_smi); | |
2391 | ||
2392 | /* Wait until we know that we are out of any interrupt | |
2393 | handlers might have been running before we freed the | |
2394 | interrupt. */ | |
fbd568a3 | 2395 | synchronize_sched(); |
1da177e4 LT |
2396 | |
2397 | if (new_smi->si_sm) { | |
2398 | if (new_smi->handlers) | |
2399 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2400 | kfree(new_smi->si_sm); | |
2401 | } | |
7767e126 PG |
2402 | if (new_smi->io_cleanup) |
2403 | new_smi->io_cleanup(new_smi); | |
1da177e4 LT |
2404 | |
2405 | return rv; | |
2406 | } | |
2407 | ||
2408 | static __init int init_ipmi_si(void) | |
2409 | { | |
2410 | int rv = 0; | |
2411 | int pos = 0; | |
2412 | int i; | |
2413 | char *str; | |
2414 | ||
2415 | if (initialized) | |
2416 | return 0; | |
2417 | initialized = 1; | |
2418 | ||
2419 | /* Parse out the si_type string into its components. */ | |
2420 | str = si_type_str; | |
2421 | if (*str != '\0') { | |
e8b33617 | 2422 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
2423 | si_type[i] = str; |
2424 | str = strchr(str, ','); | |
2425 | if (str) { | |
2426 | *str = '\0'; | |
2427 | str++; | |
2428 | } else { | |
2429 | break; | |
2430 | } | |
2431 | } | |
2432 | } | |
2433 | ||
1fdd75bd | 2434 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 LT |
2435 | |
2436 | #ifdef CONFIG_X86 | |
b224cd3a | 2437 | dmi_find_bmc(); |
1da177e4 LT |
2438 | #endif |
2439 | ||
2440 | rv = init_one_smi(0, &(smi_infos[pos])); | |
e8b33617 | 2441 | if (rv && ! ports[0] && si_trydefaults) { |
1da177e4 LT |
2442 | /* If we are trying defaults and the initial port is |
2443 | not set, then set it. */ | |
2444 | si_type[0] = "kcs"; | |
2445 | ports[0] = DEFAULT_KCS_IO_PORT; | |
2446 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2447 | if (rv) { | |
2448 | /* No KCS - try SMIC */ | |
2449 | si_type[0] = "smic"; | |
2450 | ports[0] = DEFAULT_SMIC_IO_PORT; | |
2451 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2452 | } | |
2453 | if (rv) { | |
2454 | /* No SMIC - try BT */ | |
2455 | si_type[0] = "bt"; | |
2456 | ports[0] = DEFAULT_BT_IO_PORT; | |
2457 | rv = init_one_smi(0, &(smi_infos[pos])); | |
2458 | } | |
2459 | } | |
2460 | if (rv == 0) | |
2461 | pos++; | |
2462 | ||
e8b33617 | 2463 | for (i = 1; i < SI_MAX_PARMS; i++) { |
1da177e4 LT |
2464 | rv = init_one_smi(i, &(smi_infos[pos])); |
2465 | if (rv == 0) | |
2466 | pos++; | |
2467 | } | |
2468 | ||
2469 | if (smi_infos[0] == NULL) { | |
2470 | printk("ipmi_si: Unable to find any System Interface(s)\n"); | |
2471 | return -ENODEV; | |
2472 | } | |
2473 | ||
2474 | return 0; | |
2475 | } | |
2476 | module_init(init_ipmi_si); | |
2477 | ||
2478 | static void __exit cleanup_one_si(struct smi_info *to_clean) | |
2479 | { | |
2480 | int rv; | |
2481 | unsigned long flags; | |
2482 | ||
2483 | if (! to_clean) | |
2484 | return; | |
2485 | ||
2486 | /* Tell the timer and interrupt handlers that we are shutting | |
2487 | down. */ | |
2488 | spin_lock_irqsave(&(to_clean->si_lock), flags); | |
2489 | spin_lock(&(to_clean->msg_lock)); | |
2490 | ||
a9a2c44f | 2491 | atomic_inc(&to_clean->stop_operation); |
1da177e4 LT |
2492 | to_clean->irq_cleanup(to_clean); |
2493 | ||
2494 | spin_unlock(&(to_clean->msg_lock)); | |
2495 | spin_unlock_irqrestore(&(to_clean->si_lock), flags); | |
2496 | ||
2497 | /* Wait until we know that we are out of any interrupt | |
2498 | handlers might have been running before we freed the | |
2499 | interrupt. */ | |
fbd568a3 | 2500 | synchronize_sched(); |
1da177e4 | 2501 | |
a9a2c44f | 2502 | wait_for_timer_and_thread(to_clean); |
1da177e4 LT |
2503 | |
2504 | /* Interrupts and timeouts are stopped, now make sure the | |
2505 | interface is in a clean state. */ | |
e8b33617 | 2506 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 2507 | poll(to_clean); |
da4cd8df | 2508 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2509 | } |
2510 | ||
2511 | rv = ipmi_unregister_smi(to_clean->intf); | |
2512 | if (rv) { | |
2513 | printk(KERN_ERR | |
2514 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
2515 | rv); | |
2516 | } | |
2517 | ||
2518 | to_clean->handlers->cleanup(to_clean->si_sm); | |
2519 | ||
2520 | kfree(to_clean->si_sm); | |
2521 | ||
7767e126 PG |
2522 | if (to_clean->io_cleanup) |
2523 | to_clean->io_cleanup(to_clean); | |
1da177e4 LT |
2524 | } |
2525 | ||
2526 | static __exit void cleanup_ipmi_si(void) | |
2527 | { | |
2528 | int i; | |
2529 | ||
e8b33617 | 2530 | if (! initialized) |
1da177e4 LT |
2531 | return; |
2532 | ||
e8b33617 | 2533 | for (i = 0; i < SI_MAX_DRIVERS; i++) { |
1da177e4 LT |
2534 | cleanup_one_si(smi_infos[i]); |
2535 | } | |
2536 | } | |
2537 | module_exit(cleanup_ipmi_si); | |
2538 | ||
2539 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
2540 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
2541 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT system interfaces."); |