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