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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/config.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
40 | #include <acpi/acpi.h> | |
41 | #include <asm/io.h> | |
42 | #include <acpi/acpi_bus.h> | |
43 | #include <acpi/processor.h> | |
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include <linux/efi.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_OS_SERVICES | |
50 | ACPI_MODULE_NAME ("osl") | |
51 | ||
52 | #define PREFIX "ACPI: " | |
53 | ||
54 | struct acpi_os_dpc | |
55 | { | |
56 | acpi_osd_exec_callback function; | |
57 | void *context; | |
58 | }; | |
59 | ||
60 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
61 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
62 | #endif | |
63 | ||
64 | #ifdef ENABLE_DEBUGGER | |
65 | #include <linux/kdb.h> | |
66 | ||
67 | /* stuff for debugger support */ | |
68 | int acpi_in_debugger; | |
69 | EXPORT_SYMBOL(acpi_in_debugger); | |
70 | ||
71 | extern char line_buf[80]; | |
72 | #endif /*ENABLE_DEBUGGER*/ | |
73 | ||
fb9802fa LY |
74 | int acpi_specific_hotkey_enabled; |
75 | EXPORT_SYMBOL(acpi_specific_hotkey_enabled); | |
76 | ||
1da177e4 LT |
77 | static unsigned int acpi_irq_irq; |
78 | static acpi_osd_handler acpi_irq_handler; | |
79 | static void *acpi_irq_context; | |
80 | static struct workqueue_struct *kacpid_wq; | |
81 | ||
82 | acpi_status | |
83 | acpi_os_initialize(void) | |
84 | { | |
85 | return AE_OK; | |
86 | } | |
87 | ||
88 | acpi_status | |
89 | acpi_os_initialize1(void) | |
90 | { | |
91 | /* | |
92 | * Initialize PCI configuration space access, as we'll need to access | |
93 | * it while walking the namespace (bus 0 and root bridges w/ _BBNs). | |
94 | */ | |
95 | #ifdef CONFIG_ACPI_PCI | |
96 | if (!raw_pci_ops) { | |
97 | printk(KERN_ERR PREFIX "Access to PCI configuration space unavailable\n"); | |
98 | return AE_NULL_ENTRY; | |
99 | } | |
100 | #endif | |
101 | kacpid_wq = create_singlethread_workqueue("kacpid"); | |
102 | BUG_ON(!kacpid_wq); | |
103 | ||
104 | return AE_OK; | |
105 | } | |
106 | ||
107 | acpi_status | |
108 | acpi_os_terminate(void) | |
109 | { | |
110 | if (acpi_irq_handler) { | |
111 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
112 | acpi_irq_handler); | |
113 | } | |
114 | ||
115 | destroy_workqueue(kacpid_wq); | |
116 | ||
117 | return AE_OK; | |
118 | } | |
119 | ||
120 | void | |
121 | acpi_os_printf(const char *fmt,...) | |
122 | { | |
123 | va_list args; | |
124 | va_start(args, fmt); | |
125 | acpi_os_vprintf(fmt, args); | |
126 | va_end(args); | |
127 | } | |
128 | EXPORT_SYMBOL(acpi_os_printf); | |
129 | ||
130 | void | |
131 | acpi_os_vprintf(const char *fmt, va_list args) | |
132 | { | |
133 | static char buffer[512]; | |
134 | ||
135 | vsprintf(buffer, fmt, args); | |
136 | ||
137 | #ifdef ENABLE_DEBUGGER | |
138 | if (acpi_in_debugger) { | |
139 | kdb_printf("%s", buffer); | |
140 | } else { | |
141 | printk("%s", buffer); | |
142 | } | |
143 | #else | |
144 | printk("%s", buffer); | |
145 | #endif | |
146 | } | |
147 | ||
148 | void * | |
149 | acpi_os_allocate(acpi_size size) | |
150 | { | |
151 | return kmalloc(size, GFP_KERNEL); | |
152 | } | |
153 | ||
154 | void | |
155 | acpi_os_free(void *ptr) | |
156 | { | |
157 | kfree(ptr); | |
158 | } | |
159 | EXPORT_SYMBOL(acpi_os_free); | |
160 | ||
161 | acpi_status | |
162 | acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) | |
163 | { | |
164 | if (efi_enabled) { | |
165 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
166 | if (efi.acpi20) | |
167 | addr->pointer.physical = | |
168 | (acpi_physical_address) virt_to_phys(efi.acpi20); | |
169 | else if (efi.acpi) | |
170 | addr->pointer.physical = | |
171 | (acpi_physical_address) virt_to_phys(efi.acpi); | |
172 | else { | |
173 | printk(KERN_ERR PREFIX "System description tables not found\n"); | |
174 | return AE_NOT_FOUND; | |
175 | } | |
176 | } else { | |
177 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
178 | printk(KERN_ERR PREFIX "System description tables not found\n"); | |
179 | return AE_NOT_FOUND; | |
180 | } | |
181 | } | |
182 | ||
183 | return AE_OK; | |
184 | } | |
185 | ||
186 | acpi_status | |
187 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, void __iomem **virt) | |
188 | { | |
189 | if (efi_enabled) { | |
190 | if (EFI_MEMORY_WB & efi_mem_attributes(phys)) { | |
191 | *virt = (void __iomem *) phys_to_virt(phys); | |
192 | } else { | |
193 | *virt = ioremap(phys, size); | |
194 | } | |
195 | } else { | |
196 | if (phys > ULONG_MAX) { | |
197 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
198 | return AE_BAD_PARAMETER; | |
199 | } | |
200 | /* | |
201 | * ioremap checks to ensure this is in reserved space | |
202 | */ | |
203 | *virt = ioremap((unsigned long) phys, size); | |
204 | } | |
205 | ||
206 | if (!*virt) | |
207 | return AE_NO_MEMORY; | |
208 | ||
209 | return AE_OK; | |
210 | } | |
211 | ||
212 | void | |
213 | acpi_os_unmap_memory(void __iomem *virt, acpi_size size) | |
214 | { | |
215 | iounmap(virt); | |
216 | } | |
217 | ||
218 | #ifdef ACPI_FUTURE_USAGE | |
219 | acpi_status | |
220 | acpi_os_get_physical_address(void *virt, acpi_physical_address *phys) | |
221 | { | |
222 | if(!phys || !virt) | |
223 | return AE_BAD_PARAMETER; | |
224 | ||
225 | *phys = virt_to_phys(virt); | |
226 | ||
227 | return AE_OK; | |
228 | } | |
229 | #endif | |
230 | ||
231 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
232 | ||
233 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
234 | ||
235 | acpi_status | |
236 | acpi_os_predefined_override (const struct acpi_predefined_names *init_val, | |
237 | acpi_string *new_val) | |
238 | { | |
239 | if (!init_val || !new_val) | |
240 | return AE_BAD_PARAMETER; | |
241 | ||
242 | *new_val = NULL; | |
243 | if (!memcmp (init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { | |
244 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", | |
245 | acpi_os_name); | |
246 | *new_val = acpi_os_name; | |
247 | } | |
248 | ||
249 | return AE_OK; | |
250 | } | |
251 | ||
252 | acpi_status | |
253 | acpi_os_table_override (struct acpi_table_header *existing_table, | |
254 | struct acpi_table_header **new_table) | |
255 | { | |
256 | if (!existing_table || !new_table) | |
257 | return AE_BAD_PARAMETER; | |
258 | ||
259 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
260 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
261 | *new_table = (struct acpi_table_header*)AmlCode; | |
262 | else | |
263 | *new_table = NULL; | |
264 | #else | |
265 | *new_table = NULL; | |
266 | #endif | |
267 | return AE_OK; | |
268 | } | |
269 | ||
270 | static irqreturn_t | |
271 | acpi_irq(int irq, void *dev_id, struct pt_regs *regs) | |
272 | { | |
273 | return (*acpi_irq_handler)(acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; | |
274 | } | |
275 | ||
276 | acpi_status | |
277 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, void *context) | |
278 | { | |
279 | unsigned int irq; | |
280 | ||
281 | /* | |
282 | * Ignore the GSI from the core, and use the value in our copy of the | |
283 | * FADT. It may not be the same if an interrupt source override exists | |
284 | * for the SCI. | |
285 | */ | |
286 | gsi = acpi_fadt.sci_int; | |
287 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
288 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
289 | gsi); | |
290 | return AE_OK; | |
291 | } | |
292 | ||
293 | acpi_irq_handler = handler; | |
294 | acpi_irq_context = context; | |
295 | if (request_irq(irq, acpi_irq, SA_SHIRQ, "acpi", acpi_irq)) { | |
296 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); | |
297 | return AE_NOT_ACQUIRED; | |
298 | } | |
299 | acpi_irq_irq = irq; | |
300 | ||
301 | return AE_OK; | |
302 | } | |
303 | ||
304 | acpi_status | |
305 | acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) | |
306 | { | |
307 | if (irq) { | |
308 | free_irq(irq, acpi_irq); | |
309 | acpi_irq_handler = NULL; | |
310 | acpi_irq_irq = 0; | |
311 | } | |
312 | ||
313 | return AE_OK; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Running in interpreter thread context, safe to sleep | |
318 | */ | |
319 | ||
320 | void | |
321 | acpi_os_sleep(acpi_integer ms) | |
322 | { | |
323 | current->state = TASK_INTERRUPTIBLE; | |
324 | schedule_timeout(((signed long) ms * HZ) / 1000); | |
325 | } | |
326 | EXPORT_SYMBOL(acpi_os_sleep); | |
327 | ||
328 | void | |
329 | acpi_os_stall(u32 us) | |
330 | { | |
331 | while (us) { | |
332 | u32 delay = 1000; | |
333 | ||
334 | if (delay > us) | |
335 | delay = us; | |
336 | udelay(delay); | |
337 | touch_nmi_watchdog(); | |
338 | us -= delay; | |
339 | } | |
340 | } | |
341 | EXPORT_SYMBOL(acpi_os_stall); | |
342 | ||
343 | /* | |
344 | * Support ACPI 3.0 AML Timer operand | |
345 | * Returns 64-bit free-running, monotonically increasing timer | |
346 | * with 100ns granularity | |
347 | */ | |
348 | u64 | |
349 | acpi_os_get_timer (void) | |
350 | { | |
351 | static u64 t; | |
352 | ||
353 | #ifdef CONFIG_HPET | |
354 | /* TBD: use HPET if available */ | |
355 | #endif | |
356 | ||
357 | #ifdef CONFIG_X86_PM_TIMER | |
358 | /* TBD: default to PM timer if HPET was not available */ | |
359 | #endif | |
360 | if (!t) | |
361 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
362 | ||
363 | return ++t; | |
364 | } | |
365 | ||
366 | acpi_status | |
367 | acpi_os_read_port( | |
368 | acpi_io_address port, | |
369 | u32 *value, | |
370 | u32 width) | |
371 | { | |
372 | u32 dummy; | |
373 | ||
374 | if (!value) | |
375 | value = &dummy; | |
376 | ||
377 | switch (width) | |
378 | { | |
379 | case 8: | |
380 | *(u8*) value = inb(port); | |
381 | break; | |
382 | case 16: | |
383 | *(u16*) value = inw(port); | |
384 | break; | |
385 | case 32: | |
386 | *(u32*) value = inl(port); | |
387 | break; | |
388 | default: | |
389 | BUG(); | |
390 | } | |
391 | ||
392 | return AE_OK; | |
393 | } | |
394 | EXPORT_SYMBOL(acpi_os_read_port); | |
395 | ||
396 | acpi_status | |
397 | acpi_os_write_port( | |
398 | acpi_io_address port, | |
399 | u32 value, | |
400 | u32 width) | |
401 | { | |
402 | switch (width) | |
403 | { | |
404 | case 8: | |
405 | outb(value, port); | |
406 | break; | |
407 | case 16: | |
408 | outw(value, port); | |
409 | break; | |
410 | case 32: | |
411 | outl(value, port); | |
412 | break; | |
413 | default: | |
414 | BUG(); | |
415 | } | |
416 | ||
417 | return AE_OK; | |
418 | } | |
419 | EXPORT_SYMBOL(acpi_os_write_port); | |
420 | ||
421 | acpi_status | |
422 | acpi_os_read_memory( | |
423 | acpi_physical_address phys_addr, | |
424 | u32 *value, | |
425 | u32 width) | |
426 | { | |
427 | u32 dummy; | |
428 | void __iomem *virt_addr; | |
429 | int iomem = 0; | |
430 | ||
431 | if (efi_enabled) { | |
432 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
433 | /* HACK ALERT! We can use readb/w/l on real memory too.. */ | |
434 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
435 | } else { | |
436 | iomem = 1; | |
437 | virt_addr = ioremap(phys_addr, width); | |
438 | } | |
439 | } else | |
440 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
441 | if (!value) | |
442 | value = &dummy; | |
443 | ||
444 | switch (width) { | |
445 | case 8: | |
446 | *(u8*) value = readb(virt_addr); | |
447 | break; | |
448 | case 16: | |
449 | *(u16*) value = readw(virt_addr); | |
450 | break; | |
451 | case 32: | |
452 | *(u32*) value = readl(virt_addr); | |
453 | break; | |
454 | default: | |
455 | BUG(); | |
456 | } | |
457 | ||
458 | if (efi_enabled) { | |
459 | if (iomem) | |
460 | iounmap(virt_addr); | |
461 | } | |
462 | ||
463 | return AE_OK; | |
464 | } | |
465 | ||
466 | acpi_status | |
467 | acpi_os_write_memory( | |
468 | acpi_physical_address phys_addr, | |
469 | u32 value, | |
470 | u32 width) | |
471 | { | |
472 | void __iomem *virt_addr; | |
473 | int iomem = 0; | |
474 | ||
475 | if (efi_enabled) { | |
476 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
477 | /* HACK ALERT! We can use writeb/w/l on real memory too */ | |
478 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
479 | } else { | |
480 | iomem = 1; | |
481 | virt_addr = ioremap(phys_addr, width); | |
482 | } | |
483 | } else | |
484 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
485 | ||
486 | switch (width) { | |
487 | case 8: | |
488 | writeb(value, virt_addr); | |
489 | break; | |
490 | case 16: | |
491 | writew(value, virt_addr); | |
492 | break; | |
493 | case 32: | |
494 | writel(value, virt_addr); | |
495 | break; | |
496 | default: | |
497 | BUG(); | |
498 | } | |
499 | ||
500 | if (iomem) | |
501 | iounmap(virt_addr); | |
502 | ||
503 | return AE_OK; | |
504 | } | |
505 | ||
506 | #ifdef CONFIG_ACPI_PCI | |
507 | ||
508 | acpi_status | |
509 | acpi_os_read_pci_configuration (struct acpi_pci_id *pci_id, u32 reg, void *value, u32 width) | |
510 | { | |
511 | int result, size; | |
512 | ||
513 | if (!value) | |
514 | return AE_BAD_PARAMETER; | |
515 | ||
516 | switch (width) { | |
517 | case 8: | |
518 | size = 1; | |
519 | break; | |
520 | case 16: | |
521 | size = 2; | |
522 | break; | |
523 | case 32: | |
524 | size = 4; | |
525 | break; | |
526 | default: | |
527 | return AE_ERROR; | |
528 | } | |
529 | ||
530 | BUG_ON(!raw_pci_ops); | |
531 | ||
532 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
533 | PCI_DEVFN(pci_id->device, pci_id->function), | |
534 | reg, size, value); | |
535 | ||
536 | return (result ? AE_ERROR : AE_OK); | |
537 | } | |
538 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); | |
539 | ||
540 | acpi_status | |
541 | acpi_os_write_pci_configuration (struct acpi_pci_id *pci_id, u32 reg, acpi_integer value, u32 width) | |
542 | { | |
543 | int result, size; | |
544 | ||
545 | switch (width) { | |
546 | case 8: | |
547 | size = 1; | |
548 | break; | |
549 | case 16: | |
550 | size = 2; | |
551 | break; | |
552 | case 32: | |
553 | size = 4; | |
554 | break; | |
555 | default: | |
556 | return AE_ERROR; | |
557 | } | |
558 | ||
559 | BUG_ON(!raw_pci_ops); | |
560 | ||
561 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
562 | PCI_DEVFN(pci_id->device, pci_id->function), | |
563 | reg, size, value); | |
564 | ||
565 | return (result ? AE_ERROR : AE_OK); | |
566 | } | |
567 | ||
568 | /* TODO: Change code to take advantage of driver model more */ | |
569 | static void | |
570 | acpi_os_derive_pci_id_2 ( | |
571 | acpi_handle rhandle, /* upper bound */ | |
572 | acpi_handle chandle, /* current node */ | |
573 | struct acpi_pci_id **id, | |
574 | int *is_bridge, | |
575 | u8 *bus_number) | |
576 | { | |
577 | acpi_handle handle; | |
578 | struct acpi_pci_id *pci_id = *id; | |
579 | acpi_status status; | |
580 | unsigned long temp; | |
581 | acpi_object_type type; | |
582 | u8 tu8; | |
583 | ||
584 | acpi_get_parent(chandle, &handle); | |
585 | if (handle != rhandle) { | |
586 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, bus_number); | |
587 | ||
588 | status = acpi_get_type(handle, &type); | |
589 | if ( (ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE) ) | |
590 | return; | |
591 | ||
592 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &temp); | |
593 | if (ACPI_SUCCESS(status)) { | |
594 | pci_id->device = ACPI_HIWORD (ACPI_LODWORD (temp)); | |
595 | pci_id->function = ACPI_LOWORD (ACPI_LODWORD (temp)); | |
596 | ||
597 | if (*is_bridge) | |
598 | pci_id->bus = *bus_number; | |
599 | ||
600 | /* any nicer way to get bus number of bridge ? */ | |
601 | status = acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, 8); | |
602 | if (ACPI_SUCCESS(status) && | |
603 | ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
604 | status = acpi_os_read_pci_configuration(pci_id, 0x18, &tu8, 8); | |
605 | if (!ACPI_SUCCESS(status)) { | |
606 | /* Certainly broken... FIX ME */ | |
607 | return; | |
608 | } | |
609 | *is_bridge = 1; | |
610 | pci_id->bus = tu8; | |
611 | status = acpi_os_read_pci_configuration(pci_id, 0x19, &tu8, 8); | |
612 | if (ACPI_SUCCESS(status)) { | |
613 | *bus_number = tu8; | |
614 | } | |
615 | } else | |
616 | *is_bridge = 0; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | void | |
622 | acpi_os_derive_pci_id ( | |
623 | acpi_handle rhandle, /* upper bound */ | |
624 | acpi_handle chandle, /* current node */ | |
625 | struct acpi_pci_id **id) | |
626 | { | |
627 | int is_bridge = 1; | |
628 | u8 bus_number = (*id)->bus; | |
629 | ||
630 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
631 | } | |
632 | ||
633 | #else /*!CONFIG_ACPI_PCI*/ | |
634 | ||
635 | acpi_status | |
636 | acpi_os_write_pci_configuration ( | |
637 | struct acpi_pci_id *pci_id, | |
638 | u32 reg, | |
639 | acpi_integer value, | |
640 | u32 width) | |
641 | { | |
642 | return AE_SUPPORT; | |
643 | } | |
644 | ||
645 | acpi_status | |
646 | acpi_os_read_pci_configuration ( | |
647 | struct acpi_pci_id *pci_id, | |
648 | u32 reg, | |
649 | void *value, | |
650 | u32 width) | |
651 | { | |
652 | return AE_SUPPORT; | |
653 | } | |
654 | ||
655 | void | |
656 | acpi_os_derive_pci_id ( | |
657 | acpi_handle rhandle, /* upper bound */ | |
658 | acpi_handle chandle, /* current node */ | |
659 | struct acpi_pci_id **id) | |
660 | { | |
661 | } | |
662 | ||
663 | #endif /*CONFIG_ACPI_PCI*/ | |
664 | ||
665 | static void | |
666 | acpi_os_execute_deferred ( | |
667 | void *context) | |
668 | { | |
669 | struct acpi_os_dpc *dpc = NULL; | |
670 | ||
671 | ACPI_FUNCTION_TRACE ("os_execute_deferred"); | |
672 | ||
673 | dpc = (struct acpi_os_dpc *) context; | |
674 | if (!dpc) { | |
675 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); | |
676 | return_VOID; | |
677 | } | |
678 | ||
679 | dpc->function(dpc->context); | |
680 | ||
681 | kfree(dpc); | |
682 | ||
683 | return_VOID; | |
684 | } | |
685 | ||
686 | acpi_status | |
687 | acpi_os_queue_for_execution( | |
688 | u32 priority, | |
689 | acpi_osd_exec_callback function, | |
690 | void *context) | |
691 | { | |
692 | acpi_status status = AE_OK; | |
693 | struct acpi_os_dpc *dpc; | |
694 | struct work_struct *task; | |
695 | ||
696 | ACPI_FUNCTION_TRACE ("os_queue_for_execution"); | |
697 | ||
698 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Scheduling function [%p(%p)] for deferred execution.\n", function, context)); | |
699 | ||
700 | if (!function) | |
701 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
702 | ||
703 | /* | |
704 | * Allocate/initialize DPC structure. Note that this memory will be | |
705 | * freed by the callee. The kernel handles the tq_struct list in a | |
706 | * way that allows us to also free its memory inside the callee. | |
707 | * Because we may want to schedule several tasks with different | |
708 | * parameters we can't use the approach some kernel code uses of | |
709 | * having a static tq_struct. | |
710 | * We can save time and code by allocating the DPC and tq_structs | |
711 | * from the same memory. | |
712 | */ | |
713 | ||
714 | dpc = kmalloc(sizeof(struct acpi_os_dpc)+sizeof(struct work_struct), GFP_ATOMIC); | |
715 | if (!dpc) | |
716 | return_ACPI_STATUS (AE_NO_MEMORY); | |
717 | ||
718 | dpc->function = function; | |
719 | dpc->context = context; | |
720 | ||
721 | task = (void *)(dpc+1); | |
722 | INIT_WORK(task, acpi_os_execute_deferred, (void*)dpc); | |
723 | ||
724 | if (!queue_work(kacpid_wq, task)) { | |
725 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Call to queue_work() failed.\n")); | |
726 | kfree(dpc); | |
727 | status = AE_ERROR; | |
728 | } | |
729 | ||
730 | return_ACPI_STATUS (status); | |
731 | } | |
732 | EXPORT_SYMBOL(acpi_os_queue_for_execution); | |
733 | ||
734 | void | |
735 | acpi_os_wait_events_complete( | |
736 | void *context) | |
737 | { | |
738 | flush_workqueue(kacpid_wq); | |
739 | } | |
740 | EXPORT_SYMBOL(acpi_os_wait_events_complete); | |
741 | ||
742 | /* | |
743 | * Allocate the memory for a spinlock and initialize it. | |
744 | */ | |
745 | acpi_status | |
746 | acpi_os_create_lock ( | |
747 | acpi_handle *out_handle) | |
748 | { | |
749 | spinlock_t *lock_ptr; | |
750 | ||
751 | ACPI_FUNCTION_TRACE ("os_create_lock"); | |
752 | ||
753 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
754 | ||
755 | spin_lock_init(lock_ptr); | |
756 | ||
757 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); | |
758 | ||
759 | *out_handle = lock_ptr; | |
760 | ||
761 | return_ACPI_STATUS (AE_OK); | |
762 | } | |
763 | ||
764 | ||
765 | /* | |
766 | * Deallocate the memory for a spinlock. | |
767 | */ | |
768 | void | |
769 | acpi_os_delete_lock ( | |
770 | acpi_handle handle) | |
771 | { | |
772 | ACPI_FUNCTION_TRACE ("os_create_lock"); | |
773 | ||
774 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); | |
775 | ||
776 | acpi_os_free(handle); | |
777 | ||
778 | return_VOID; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Acquire a spinlock. | |
783 | * | |
784 | * handle is a pointer to the spinlock_t. | |
785 | * flags is *not* the result of save_flags - it is an ACPI-specific flag variable | |
786 | * that indicates whether we are at interrupt level. | |
787 | */ | |
788 | void | |
789 | acpi_os_acquire_lock ( | |
790 | acpi_handle handle, | |
791 | u32 flags) | |
792 | { | |
793 | ACPI_FUNCTION_TRACE ("os_acquire_lock"); | |
794 | ||
795 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Acquiring spinlock[%p] from %s level\n", handle, | |
796 | ((flags & ACPI_NOT_ISR) ? "non-interrupt" : "interrupt"))); | |
797 | ||
798 | if (flags & ACPI_NOT_ISR) | |
799 | ACPI_DISABLE_IRQS(); | |
800 | ||
801 | spin_lock((spinlock_t *)handle); | |
802 | ||
803 | return_VOID; | |
804 | } | |
805 | ||
806 | ||
807 | /* | |
808 | * Release a spinlock. See above. | |
809 | */ | |
810 | void | |
811 | acpi_os_release_lock ( | |
812 | acpi_handle handle, | |
813 | u32 flags) | |
814 | { | |
815 | ACPI_FUNCTION_TRACE ("os_release_lock"); | |
816 | ||
817 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Releasing spinlock[%p] from %s level\n", handle, | |
818 | ((flags & ACPI_NOT_ISR) ? "non-interrupt" : "interrupt"))); | |
819 | ||
820 | spin_unlock((spinlock_t *)handle); | |
821 | ||
822 | if (flags & ACPI_NOT_ISR) | |
823 | ACPI_ENABLE_IRQS(); | |
824 | ||
825 | return_VOID; | |
826 | } | |
827 | ||
828 | ||
829 | acpi_status | |
830 | acpi_os_create_semaphore( | |
831 | u32 max_units, | |
832 | u32 initial_units, | |
833 | acpi_handle *handle) | |
834 | { | |
835 | struct semaphore *sem = NULL; | |
836 | ||
837 | ACPI_FUNCTION_TRACE ("os_create_semaphore"); | |
838 | ||
839 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
840 | if (!sem) | |
841 | return_ACPI_STATUS (AE_NO_MEMORY); | |
842 | memset(sem, 0, sizeof(struct semaphore)); | |
843 | ||
844 | sema_init(sem, initial_units); | |
845 | ||
846 | *handle = (acpi_handle*)sem; | |
847 | ||
848 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", *handle, initial_units)); | |
849 | ||
850 | return_ACPI_STATUS (AE_OK); | |
851 | } | |
852 | EXPORT_SYMBOL(acpi_os_create_semaphore); | |
853 | ||
854 | ||
855 | /* | |
856 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
857 | * 'delete_semaphore()' function -- may result in an invalid | |
858 | * pointer dereference for non-synchronized consumers. Should | |
859 | * we at least check for blocked threads and signal/cancel them? | |
860 | */ | |
861 | ||
862 | acpi_status | |
863 | acpi_os_delete_semaphore( | |
864 | acpi_handle handle) | |
865 | { | |
866 | struct semaphore *sem = (struct semaphore*) handle; | |
867 | ||
868 | ACPI_FUNCTION_TRACE ("os_delete_semaphore"); | |
869 | ||
870 | if (!sem) | |
871 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
872 | ||
873 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); | |
874 | ||
875 | acpi_os_free(sem); sem = NULL; | |
876 | ||
877 | return_ACPI_STATUS (AE_OK); | |
878 | } | |
879 | EXPORT_SYMBOL(acpi_os_delete_semaphore); | |
880 | ||
881 | ||
882 | /* | |
883 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
884 | * improvise. The process is to sleep for one scheduler quantum | |
885 | * until the semaphore becomes available. Downside is that this | |
886 | * may result in starvation for timeout-based waits when there's | |
887 | * lots of semaphore activity. | |
888 | * | |
889 | * TODO: Support for units > 1? | |
890 | */ | |
891 | acpi_status | |
892 | acpi_os_wait_semaphore( | |
893 | acpi_handle handle, | |
894 | u32 units, | |
895 | u16 timeout) | |
896 | { | |
897 | acpi_status status = AE_OK; | |
898 | struct semaphore *sem = (struct semaphore*)handle; | |
899 | int ret = 0; | |
900 | ||
901 | ACPI_FUNCTION_TRACE ("os_wait_semaphore"); | |
902 | ||
903 | if (!sem || (units < 1)) | |
904 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
905 | ||
906 | if (units > 1) | |
907 | return_ACPI_STATUS (AE_SUPPORT); | |
908 | ||
909 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", handle, units, timeout)); | |
910 | ||
911 | if (in_atomic()) | |
912 | timeout = 0; | |
913 | ||
914 | switch (timeout) | |
915 | { | |
916 | /* | |
917 | * No Wait: | |
918 | * -------- | |
919 | * A zero timeout value indicates that we shouldn't wait - just | |
920 | * acquire the semaphore if available otherwise return AE_TIME | |
921 | * (a.k.a. 'would block'). | |
922 | */ | |
923 | case 0: | |
924 | if(down_trylock(sem)) | |
925 | status = AE_TIME; | |
926 | break; | |
927 | ||
928 | /* | |
929 | * Wait Indefinitely: | |
930 | * ------------------ | |
931 | */ | |
932 | case ACPI_WAIT_FOREVER: | |
933 | down(sem); | |
934 | break; | |
935 | ||
936 | /* | |
937 | * Wait w/ Timeout: | |
938 | * ---------------- | |
939 | */ | |
940 | default: | |
941 | // TODO: A better timeout algorithm? | |
942 | { | |
943 | int i = 0; | |
944 | static const int quantum_ms = 1000/HZ; | |
945 | ||
946 | ret = down_trylock(sem); | |
947 | for (i = timeout; (i > 0 && ret < 0); i -= quantum_ms) { | |
948 | current->state = TASK_INTERRUPTIBLE; | |
949 | schedule_timeout(1); | |
950 | ret = down_trylock(sem); | |
951 | } | |
952 | ||
953 | if (ret != 0) | |
954 | status = AE_TIME; | |
955 | } | |
956 | break; | |
957 | } | |
958 | ||
959 | if (ACPI_FAILURE(status)) { | |
960 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Failed to acquire semaphore[%p|%d|%d], %s\n", | |
961 | handle, units, timeout, acpi_format_exception(status))); | |
962 | } | |
963 | else { | |
964 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Acquired semaphore[%p|%d|%d]\n", handle, units, timeout)); | |
965 | } | |
966 | ||
967 | return_ACPI_STATUS (status); | |
968 | } | |
969 | EXPORT_SYMBOL(acpi_os_wait_semaphore); | |
970 | ||
971 | ||
972 | /* | |
973 | * TODO: Support for units > 1? | |
974 | */ | |
975 | acpi_status | |
976 | acpi_os_signal_semaphore( | |
977 | acpi_handle handle, | |
978 | u32 units) | |
979 | { | |
980 | struct semaphore *sem = (struct semaphore *) handle; | |
981 | ||
982 | ACPI_FUNCTION_TRACE ("os_signal_semaphore"); | |
983 | ||
984 | if (!sem || (units < 1)) | |
985 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
986 | ||
987 | if (units > 1) | |
988 | return_ACPI_STATUS (AE_SUPPORT); | |
989 | ||
990 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, units)); | |
991 | ||
992 | up(sem); | |
993 | ||
994 | return_ACPI_STATUS (AE_OK); | |
995 | } | |
996 | EXPORT_SYMBOL(acpi_os_signal_semaphore); | |
997 | ||
998 | #ifdef ACPI_FUTURE_USAGE | |
999 | u32 | |
1000 | acpi_os_get_line(char *buffer) | |
1001 | { | |
1002 | ||
1003 | #ifdef ENABLE_DEBUGGER | |
1004 | if (acpi_in_debugger) { | |
1005 | u32 chars; | |
1006 | ||
1007 | kdb_read(buffer, sizeof(line_buf)); | |
1008 | ||
1009 | /* remove the CR kdb includes */ | |
1010 | chars = strlen(buffer) - 1; | |
1011 | buffer[chars] = '\0'; | |
1012 | } | |
1013 | #endif | |
1014 | ||
1015 | return 0; | |
1016 | } | |
1017 | #endif /* ACPI_FUTURE_USAGE */ | |
1018 | ||
1019 | /* Assumes no unreadable holes inbetween */ | |
1020 | u8 | |
1021 | acpi_os_readable(void *ptr, acpi_size len) | |
1022 | { | |
1023 | #if defined(__i386__) || defined(__x86_64__) | |
1024 | char tmp; | |
1025 | return !__get_user(tmp, (char __user *)ptr) && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1026 | #endif | |
1027 | return 1; | |
1028 | } | |
1029 | ||
1030 | #ifdef ACPI_FUTURE_USAGE | |
1031 | u8 | |
1032 | acpi_os_writable(void *ptr, acpi_size len) | |
1033 | { | |
1034 | /* could do dummy write (racy) or a kernel page table lookup. | |
1035 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
1036 | return 1; | |
1037 | } | |
1038 | #endif | |
1039 | ||
1040 | u32 | |
1041 | acpi_os_get_thread_id (void) | |
1042 | { | |
1043 | if (!in_atomic()) | |
1044 | return current->pid; | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | acpi_status | |
1050 | acpi_os_signal ( | |
1051 | u32 function, | |
1052 | void *info) | |
1053 | { | |
1054 | switch (function) | |
1055 | { | |
1056 | case ACPI_SIGNAL_FATAL: | |
1057 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1058 | break; | |
1059 | case ACPI_SIGNAL_BREAKPOINT: | |
1060 | /* | |
1061 | * AML Breakpoint | |
1062 | * ACPI spec. says to treat it as a NOP unless | |
1063 | * you are debugging. So if/when we integrate | |
1064 | * AML debugger into the kernel debugger its | |
1065 | * hook will go here. But until then it is | |
1066 | * not useful to print anything on breakpoints. | |
1067 | */ | |
1068 | break; | |
1069 | default: | |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | return AE_OK; | |
1074 | } | |
1075 | EXPORT_SYMBOL(acpi_os_signal); | |
1076 | ||
1077 | static int __init | |
1078 | acpi_os_name_setup(char *str) | |
1079 | { | |
1080 | char *p = acpi_os_name; | |
1081 | int count = ACPI_MAX_OVERRIDE_LEN-1; | |
1082 | ||
1083 | if (!str || !*str) | |
1084 | return 0; | |
1085 | ||
1086 | for (; count-- && str && *str; str++) { | |
1087 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1088 | *p++ = *str; | |
1089 | else if (*str == '\'' || *str == '"') | |
1090 | continue; | |
1091 | else | |
1092 | break; | |
1093 | } | |
1094 | *p = 0; | |
1095 | ||
1096 | return 1; | |
1097 | ||
1098 | } | |
1099 | ||
1100 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1101 | ||
1102 | /* | |
1103 | * _OSI control | |
1104 | * empty string disables _OSI | |
1105 | * TBD additional string adds to _OSI | |
1106 | */ | |
1107 | static int __init | |
1108 | acpi_osi_setup(char *str) | |
1109 | { | |
1110 | if (str == NULL || *str == '\0') { | |
1111 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1112 | acpi_gbl_create_osi_method = FALSE; | |
1113 | } else | |
1114 | { | |
1115 | /* TBD */ | |
1116 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", str); | |
1117 | } | |
1118 | ||
1119 | return 1; | |
1120 | } | |
1121 | ||
1122 | __setup("acpi_osi=", acpi_osi_setup); | |
1123 | ||
1124 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
1125 | static int __init | |
1126 | acpi_serialize_setup(char *str) | |
1127 | { | |
1128 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1129 | ||
1130 | acpi_gbl_all_methods_serialized = TRUE; | |
1131 | ||
1132 | return 1; | |
1133 | } | |
1134 | ||
1135 | __setup("acpi_serialize", acpi_serialize_setup); | |
1136 | ||
1137 | /* | |
1138 | * Wake and Run-Time GPES are expected to be separate. | |
1139 | * We disable wake-GPEs at run-time to prevent spurious | |
1140 | * interrupts. | |
1141 | * | |
1142 | * However, if a system exists that shares Wake and | |
1143 | * Run-time events on the same GPE this flag is available | |
1144 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1145 | */ | |
1146 | static int __init | |
1147 | acpi_wake_gpes_always_on_setup(char *str) | |
1148 | { | |
1149 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1150 | ||
1151 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1152 | ||
1153 | return 1; | |
1154 | } | |
1155 | ||
1156 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1157 | ||
fb9802fa LY |
1158 | int __init |
1159 | acpi_hotkey_setup(char *str) | |
1160 | { | |
1161 | acpi_specific_hotkey_enabled = TRUE; | |
1162 | return 1; | |
1163 | } | |
1164 | ||
1165 | __setup("acpi_specific_hotkey", acpi_hotkey_setup); | |
1166 | ||
1da177e4 LT |
1167 | /* |
1168 | * max_cstate is defined in the base kernel so modules can | |
1169 | * change it w/o depending on the state of the processor module. | |
1170 | */ | |
1171 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1172 | ||
1173 | ||
1174 | EXPORT_SYMBOL(max_cstate); |