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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 | ||
1da177e4 | 48 | #define _COMPONENT ACPI_OS_SERVICES |
4be44fcd | 49 | ACPI_MODULE_NAME("osl") |
1da177e4 | 50 | #define PREFIX "ACPI: " |
4be44fcd LB |
51 | struct acpi_os_dpc { |
52 | acpi_osd_exec_callback function; | |
53 | void *context; | |
1da177e4 LT |
54 | }; |
55 | ||
56 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
57 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
58 | #endif | |
59 | ||
60 | #ifdef ENABLE_DEBUGGER | |
61 | #include <linux/kdb.h> | |
62 | ||
63 | /* stuff for debugger support */ | |
64 | int acpi_in_debugger; | |
65 | EXPORT_SYMBOL(acpi_in_debugger); | |
66 | ||
67 | extern char line_buf[80]; | |
4be44fcd | 68 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 69 | |
30e332f3 | 70 | int acpi_specific_hotkey_enabled = TRUE; |
fb9802fa LY |
71 | EXPORT_SYMBOL(acpi_specific_hotkey_enabled); |
72 | ||
1da177e4 LT |
73 | static unsigned int acpi_irq_irq; |
74 | static acpi_osd_handler acpi_irq_handler; | |
75 | static void *acpi_irq_context; | |
76 | static struct workqueue_struct *kacpid_wq; | |
77 | ||
4be44fcd | 78 | acpi_status acpi_os_initialize(void) |
1da177e4 LT |
79 | { |
80 | return AE_OK; | |
81 | } | |
82 | ||
4be44fcd | 83 | acpi_status acpi_os_initialize1(void) |
1da177e4 LT |
84 | { |
85 | /* | |
86 | * Initialize PCI configuration space access, as we'll need to access | |
87 | * it while walking the namespace (bus 0 and root bridges w/ _BBNs). | |
88 | */ | |
1da177e4 | 89 | if (!raw_pci_ops) { |
4be44fcd LB |
90 | printk(KERN_ERR PREFIX |
91 | "Access to PCI configuration space unavailable\n"); | |
1da177e4 LT |
92 | return AE_NULL_ENTRY; |
93 | } | |
1da177e4 LT |
94 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
95 | BUG_ON(!kacpid_wq); | |
96 | ||
97 | return AE_OK; | |
98 | } | |
99 | ||
4be44fcd | 100 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
101 | { |
102 | if (acpi_irq_handler) { | |
103 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
104 | acpi_irq_handler); | |
105 | } | |
106 | ||
107 | destroy_workqueue(kacpid_wq); | |
108 | ||
109 | return AE_OK; | |
110 | } | |
111 | ||
4be44fcd | 112 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
113 | { |
114 | va_list args; | |
115 | va_start(args, fmt); | |
116 | acpi_os_vprintf(fmt, args); | |
117 | va_end(args); | |
118 | } | |
4be44fcd | 119 | |
1da177e4 LT |
120 | EXPORT_SYMBOL(acpi_os_printf); |
121 | ||
4be44fcd | 122 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
123 | { |
124 | static char buffer[512]; | |
4be44fcd | 125 | |
1da177e4 LT |
126 | vsprintf(buffer, fmt, args); |
127 | ||
128 | #ifdef ENABLE_DEBUGGER | |
129 | if (acpi_in_debugger) { | |
130 | kdb_printf("%s", buffer); | |
131 | } else { | |
132 | printk("%s", buffer); | |
133 | } | |
134 | #else | |
135 | printk("%s", buffer); | |
136 | #endif | |
137 | } | |
138 | ||
11e981f1 | 139 | extern int acpi_in_resume; |
4be44fcd | 140 | void *acpi_os_allocate(acpi_size size) |
1da177e4 | 141 | { |
11e981f1 DSL |
142 | if (acpi_in_resume) |
143 | return kmalloc(size, GFP_ATOMIC); | |
144 | else | |
145 | return kmalloc(size, GFP_KERNEL); | |
1da177e4 LT |
146 | } |
147 | ||
4be44fcd | 148 | void acpi_os_free(void *ptr) |
1da177e4 LT |
149 | { |
150 | kfree(ptr); | |
151 | } | |
4be44fcd | 152 | |
1da177e4 LT |
153 | EXPORT_SYMBOL(acpi_os_free); |
154 | ||
4be44fcd | 155 | acpi_status acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) |
1da177e4 LT |
156 | { |
157 | if (efi_enabled) { | |
158 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
159 | if (efi.acpi20) | |
160 | addr->pointer.physical = | |
4be44fcd | 161 | (acpi_physical_address) virt_to_phys(efi.acpi20); |
1da177e4 LT |
162 | else if (efi.acpi) |
163 | addr->pointer.physical = | |
4be44fcd | 164 | (acpi_physical_address) virt_to_phys(efi.acpi); |
1da177e4 | 165 | else { |
4be44fcd LB |
166 | printk(KERN_ERR PREFIX |
167 | "System description tables not found\n"); | |
1da177e4 LT |
168 | return AE_NOT_FOUND; |
169 | } | |
170 | } else { | |
171 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
4be44fcd LB |
172 | printk(KERN_ERR PREFIX |
173 | "System description tables not found\n"); | |
1da177e4 LT |
174 | return AE_NOT_FOUND; |
175 | } | |
176 | } | |
177 | ||
178 | return AE_OK; | |
179 | } | |
180 | ||
181 | acpi_status | |
4be44fcd LB |
182 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, |
183 | void __iomem ** virt) | |
1da177e4 LT |
184 | { |
185 | if (efi_enabled) { | |
186 | if (EFI_MEMORY_WB & efi_mem_attributes(phys)) { | |
4be44fcd | 187 | *virt = (void __iomem *)phys_to_virt(phys); |
1da177e4 LT |
188 | } else { |
189 | *virt = ioremap(phys, size); | |
190 | } | |
191 | } else { | |
192 | if (phys > ULONG_MAX) { | |
193 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
194 | return AE_BAD_PARAMETER; | |
195 | } | |
196 | /* | |
4be44fcd LB |
197 | * ioremap checks to ensure this is in reserved space |
198 | */ | |
199 | *virt = ioremap((unsigned long)phys, size); | |
1da177e4 LT |
200 | } |
201 | ||
202 | if (!*virt) | |
203 | return AE_NO_MEMORY; | |
204 | ||
205 | return AE_OK; | |
206 | } | |
207 | ||
4be44fcd | 208 | void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
1da177e4 LT |
209 | { |
210 | iounmap(virt); | |
211 | } | |
212 | ||
213 | #ifdef ACPI_FUTURE_USAGE | |
214 | acpi_status | |
4be44fcd | 215 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 216 | { |
4be44fcd | 217 | if (!phys || !virt) |
1da177e4 LT |
218 | return AE_BAD_PARAMETER; |
219 | ||
220 | *phys = virt_to_phys(virt); | |
221 | ||
222 | return AE_OK; | |
223 | } | |
224 | #endif | |
225 | ||
226 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
227 | ||
228 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
229 | ||
230 | acpi_status | |
4be44fcd LB |
231 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
232 | acpi_string * new_val) | |
1da177e4 LT |
233 | { |
234 | if (!init_val || !new_val) | |
235 | return AE_BAD_PARAMETER; | |
236 | ||
237 | *new_val = NULL; | |
4be44fcd | 238 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 239 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 240 | acpi_os_name); |
1da177e4 LT |
241 | *new_val = acpi_os_name; |
242 | } | |
243 | ||
244 | return AE_OK; | |
245 | } | |
246 | ||
247 | acpi_status | |
4be44fcd LB |
248 | acpi_os_table_override(struct acpi_table_header * existing_table, |
249 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
250 | { |
251 | if (!existing_table || !new_table) | |
252 | return AE_BAD_PARAMETER; | |
253 | ||
254 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
255 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 256 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 LT |
257 | else |
258 | *new_table = NULL; | |
259 | #else | |
260 | *new_table = NULL; | |
261 | #endif | |
262 | return AE_OK; | |
263 | } | |
264 | ||
4be44fcd | 265 | static irqreturn_t acpi_irq(int irq, void *dev_id, struct pt_regs *regs) |
1da177e4 | 266 | { |
4be44fcd | 267 | return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; |
1da177e4 LT |
268 | } |
269 | ||
270 | acpi_status | |
4be44fcd LB |
271 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
272 | void *context) | |
1da177e4 LT |
273 | { |
274 | unsigned int irq; | |
275 | ||
276 | /* | |
277 | * Ignore the GSI from the core, and use the value in our copy of the | |
278 | * FADT. It may not be the same if an interrupt source override exists | |
279 | * for the SCI. | |
280 | */ | |
281 | gsi = acpi_fadt.sci_int; | |
282 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
283 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
284 | gsi); | |
285 | return AE_OK; | |
286 | } | |
287 | ||
288 | acpi_irq_handler = handler; | |
289 | acpi_irq_context = context; | |
290 | if (request_irq(irq, acpi_irq, SA_SHIRQ, "acpi", acpi_irq)) { | |
291 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); | |
292 | return AE_NOT_ACQUIRED; | |
293 | } | |
294 | acpi_irq_irq = irq; | |
295 | ||
296 | return AE_OK; | |
297 | } | |
298 | ||
4be44fcd | 299 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
300 | { |
301 | if (irq) { | |
302 | free_irq(irq, acpi_irq); | |
303 | acpi_irq_handler = NULL; | |
304 | acpi_irq_irq = 0; | |
305 | } | |
306 | ||
307 | return AE_OK; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Running in interpreter thread context, safe to sleep | |
312 | */ | |
313 | ||
4be44fcd | 314 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 LT |
315 | { |
316 | current->state = TASK_INTERRUPTIBLE; | |
4be44fcd | 317 | schedule_timeout(((signed long)ms * HZ) / 1000); |
1da177e4 | 318 | } |
4be44fcd | 319 | |
1da177e4 LT |
320 | EXPORT_SYMBOL(acpi_os_sleep); |
321 | ||
4be44fcd | 322 | void acpi_os_stall(u32 us) |
1da177e4 LT |
323 | { |
324 | while (us) { | |
325 | u32 delay = 1000; | |
326 | ||
327 | if (delay > us) | |
328 | delay = us; | |
329 | udelay(delay); | |
330 | touch_nmi_watchdog(); | |
331 | us -= delay; | |
332 | } | |
333 | } | |
4be44fcd | 334 | |
1da177e4 LT |
335 | EXPORT_SYMBOL(acpi_os_stall); |
336 | ||
337 | /* | |
338 | * Support ACPI 3.0 AML Timer operand | |
339 | * Returns 64-bit free-running, monotonically increasing timer | |
340 | * with 100ns granularity | |
341 | */ | |
4be44fcd | 342 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
343 | { |
344 | static u64 t; | |
345 | ||
346 | #ifdef CONFIG_HPET | |
347 | /* TBD: use HPET if available */ | |
348 | #endif | |
349 | ||
350 | #ifdef CONFIG_X86_PM_TIMER | |
351 | /* TBD: default to PM timer if HPET was not available */ | |
352 | #endif | |
353 | if (!t) | |
354 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
355 | ||
356 | return ++t; | |
357 | } | |
358 | ||
4be44fcd | 359 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
360 | { |
361 | u32 dummy; | |
362 | ||
363 | if (!value) | |
364 | value = &dummy; | |
365 | ||
4be44fcd | 366 | switch (width) { |
1da177e4 | 367 | case 8: |
4be44fcd | 368 | *(u8 *) value = inb(port); |
1da177e4 LT |
369 | break; |
370 | case 16: | |
4be44fcd | 371 | *(u16 *) value = inw(port); |
1da177e4 LT |
372 | break; |
373 | case 32: | |
4be44fcd | 374 | *(u32 *) value = inl(port); |
1da177e4 LT |
375 | break; |
376 | default: | |
377 | BUG(); | |
378 | } | |
379 | ||
380 | return AE_OK; | |
381 | } | |
4be44fcd | 382 | |
1da177e4 LT |
383 | EXPORT_SYMBOL(acpi_os_read_port); |
384 | ||
4be44fcd | 385 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 386 | { |
4be44fcd | 387 | switch (width) { |
1da177e4 LT |
388 | case 8: |
389 | outb(value, port); | |
390 | break; | |
391 | case 16: | |
392 | outw(value, port); | |
393 | break; | |
394 | case 32: | |
395 | outl(value, port); | |
396 | break; | |
397 | default: | |
398 | BUG(); | |
399 | } | |
400 | ||
401 | return AE_OK; | |
402 | } | |
4be44fcd | 403 | |
1da177e4 LT |
404 | EXPORT_SYMBOL(acpi_os_write_port); |
405 | ||
406 | acpi_status | |
4be44fcd | 407 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 408 | { |
4be44fcd LB |
409 | u32 dummy; |
410 | void __iomem *virt_addr; | |
411 | int iomem = 0; | |
1da177e4 LT |
412 | |
413 | if (efi_enabled) { | |
414 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
415 | /* HACK ALERT! We can use readb/w/l on real memory too.. */ | |
4be44fcd | 416 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
417 | } else { |
418 | iomem = 1; | |
419 | virt_addr = ioremap(phys_addr, width); | |
420 | } | |
421 | } else | |
4be44fcd | 422 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
423 | if (!value) |
424 | value = &dummy; | |
425 | ||
426 | switch (width) { | |
427 | case 8: | |
4be44fcd | 428 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
429 | break; |
430 | case 16: | |
4be44fcd | 431 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
432 | break; |
433 | case 32: | |
4be44fcd | 434 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
435 | break; |
436 | default: | |
437 | BUG(); | |
438 | } | |
439 | ||
440 | if (efi_enabled) { | |
441 | if (iomem) | |
442 | iounmap(virt_addr); | |
443 | } | |
444 | ||
445 | return AE_OK; | |
446 | } | |
447 | ||
448 | acpi_status | |
4be44fcd | 449 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 450 | { |
4be44fcd LB |
451 | void __iomem *virt_addr; |
452 | int iomem = 0; | |
1da177e4 LT |
453 | |
454 | if (efi_enabled) { | |
455 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
456 | /* HACK ALERT! We can use writeb/w/l on real memory too */ | |
4be44fcd | 457 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
458 | } else { |
459 | iomem = 1; | |
460 | virt_addr = ioremap(phys_addr, width); | |
461 | } | |
462 | } else | |
4be44fcd | 463 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
464 | |
465 | switch (width) { | |
466 | case 8: | |
467 | writeb(value, virt_addr); | |
468 | break; | |
469 | case 16: | |
470 | writew(value, virt_addr); | |
471 | break; | |
472 | case 32: | |
473 | writel(value, virt_addr); | |
474 | break; | |
475 | default: | |
476 | BUG(); | |
477 | } | |
478 | ||
479 | if (iomem) | |
480 | iounmap(virt_addr); | |
481 | ||
482 | return AE_OK; | |
483 | } | |
484 | ||
1da177e4 | 485 | acpi_status |
4be44fcd LB |
486 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
487 | void *value, u32 width) | |
1da177e4 LT |
488 | { |
489 | int result, size; | |
490 | ||
491 | if (!value) | |
492 | return AE_BAD_PARAMETER; | |
493 | ||
494 | switch (width) { | |
495 | case 8: | |
496 | size = 1; | |
497 | break; | |
498 | case 16: | |
499 | size = 2; | |
500 | break; | |
501 | case 32: | |
502 | size = 4; | |
503 | break; | |
504 | default: | |
505 | return AE_ERROR; | |
506 | } | |
507 | ||
508 | BUG_ON(!raw_pci_ops); | |
509 | ||
510 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
511 | PCI_DEVFN(pci_id->device, pci_id->function), |
512 | reg, size, value); | |
1da177e4 LT |
513 | |
514 | return (result ? AE_ERROR : AE_OK); | |
515 | } | |
4be44fcd | 516 | |
1da177e4 LT |
517 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
518 | ||
519 | acpi_status | |
4be44fcd LB |
520 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
521 | acpi_integer value, u32 width) | |
1da177e4 LT |
522 | { |
523 | int result, size; | |
524 | ||
525 | switch (width) { | |
526 | case 8: | |
527 | size = 1; | |
528 | break; | |
529 | case 16: | |
530 | size = 2; | |
531 | break; | |
532 | case 32: | |
533 | size = 4; | |
534 | break; | |
535 | default: | |
536 | return AE_ERROR; | |
537 | } | |
538 | ||
539 | BUG_ON(!raw_pci_ops); | |
540 | ||
541 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
542 | PCI_DEVFN(pci_id->device, pci_id->function), |
543 | reg, size, value); | |
1da177e4 LT |
544 | |
545 | return (result ? AE_ERROR : AE_OK); | |
546 | } | |
547 | ||
548 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
549 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
550 | acpi_handle chandle, /* current node */ | |
551 | struct acpi_pci_id **id, | |
552 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 553 | { |
4be44fcd LB |
554 | acpi_handle handle; |
555 | struct acpi_pci_id *pci_id = *id; | |
556 | acpi_status status; | |
557 | unsigned long temp; | |
558 | acpi_object_type type; | |
559 | u8 tu8; | |
1da177e4 LT |
560 | |
561 | acpi_get_parent(chandle, &handle); | |
562 | if (handle != rhandle) { | |
4be44fcd LB |
563 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
564 | bus_number); | |
1da177e4 LT |
565 | |
566 | status = acpi_get_type(handle, &type); | |
4be44fcd | 567 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
568 | return; |
569 | ||
4be44fcd LB |
570 | status = |
571 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
572 | &temp); | |
1da177e4 | 573 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
574 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
575 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
576 | |
577 | if (*is_bridge) | |
578 | pci_id->bus = *bus_number; | |
579 | ||
580 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
581 | status = |
582 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
583 | 8); | |
584 | if (ACPI_SUCCESS(status) | |
585 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
586 | status = | |
587 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
588 | &tu8, 8); | |
1da177e4 LT |
589 | if (!ACPI_SUCCESS(status)) { |
590 | /* Certainly broken... FIX ME */ | |
591 | return; | |
592 | } | |
593 | *is_bridge = 1; | |
594 | pci_id->bus = tu8; | |
4be44fcd LB |
595 | status = |
596 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
597 | &tu8, 8); | |
1da177e4 LT |
598 | if (ACPI_SUCCESS(status)) { |
599 | *bus_number = tu8; | |
600 | } | |
601 | } else | |
602 | *is_bridge = 0; | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
4be44fcd LB |
607 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
608 | acpi_handle chandle, /* current node */ | |
609 | struct acpi_pci_id **id) | |
1da177e4 LT |
610 | { |
611 | int is_bridge = 1; | |
612 | u8 bus_number = (*id)->bus; | |
613 | ||
614 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
615 | } | |
616 | ||
4be44fcd | 617 | static void acpi_os_execute_deferred(void *context) |
1da177e4 | 618 | { |
4be44fcd | 619 | struct acpi_os_dpc *dpc = NULL; |
1da177e4 | 620 | |
4be44fcd | 621 | ACPI_FUNCTION_TRACE("os_execute_deferred"); |
1da177e4 | 622 | |
4be44fcd | 623 | dpc = (struct acpi_os_dpc *)context; |
1da177e4 | 624 | if (!dpc) { |
4be44fcd | 625 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); |
1da177e4 LT |
626 | return_VOID; |
627 | } | |
628 | ||
629 | dpc->function(dpc->context); | |
630 | ||
631 | kfree(dpc); | |
632 | ||
633 | return_VOID; | |
634 | } | |
635 | ||
636 | acpi_status | |
4be44fcd LB |
637 | acpi_os_queue_for_execution(u32 priority, |
638 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 639 | { |
4be44fcd LB |
640 | acpi_status status = AE_OK; |
641 | struct acpi_os_dpc *dpc; | |
642 | struct work_struct *task; | |
1da177e4 | 643 | |
4be44fcd | 644 | ACPI_FUNCTION_TRACE("os_queue_for_execution"); |
1da177e4 | 645 | |
4be44fcd LB |
646 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
647 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
648 | function, context)); | |
1da177e4 LT |
649 | |
650 | if (!function) | |
4be44fcd | 651 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
652 | |
653 | /* | |
654 | * Allocate/initialize DPC structure. Note that this memory will be | |
655 | * freed by the callee. The kernel handles the tq_struct list in a | |
656 | * way that allows us to also free its memory inside the callee. | |
657 | * Because we may want to schedule several tasks with different | |
658 | * parameters we can't use the approach some kernel code uses of | |
659 | * having a static tq_struct. | |
660 | * We can save time and code by allocating the DPC and tq_structs | |
661 | * from the same memory. | |
662 | */ | |
663 | ||
4be44fcd LB |
664 | dpc = |
665 | kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct), | |
666 | GFP_ATOMIC); | |
1da177e4 | 667 | if (!dpc) |
4be44fcd | 668 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
669 | |
670 | dpc->function = function; | |
671 | dpc->context = context; | |
672 | ||
4be44fcd LB |
673 | task = (void *)(dpc + 1); |
674 | INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); | |
1da177e4 LT |
675 | |
676 | if (!queue_work(kacpid_wq, task)) { | |
4be44fcd LB |
677 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
678 | "Call to queue_work() failed.\n")); | |
1da177e4 LT |
679 | kfree(dpc); |
680 | status = AE_ERROR; | |
681 | } | |
682 | ||
4be44fcd | 683 | return_ACPI_STATUS(status); |
1da177e4 | 684 | } |
4be44fcd | 685 | |
1da177e4 LT |
686 | EXPORT_SYMBOL(acpi_os_queue_for_execution); |
687 | ||
4be44fcd | 688 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
689 | { |
690 | flush_workqueue(kacpid_wq); | |
691 | } | |
4be44fcd | 692 | |
1da177e4 LT |
693 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
694 | ||
695 | /* | |
696 | * Allocate the memory for a spinlock and initialize it. | |
697 | */ | |
4be44fcd | 698 | acpi_status acpi_os_create_lock(acpi_handle * out_handle) |
1da177e4 LT |
699 | { |
700 | spinlock_t *lock_ptr; | |
701 | ||
4be44fcd | 702 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 LT |
703 | |
704 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
705 | ||
706 | spin_lock_init(lock_ptr); | |
707 | ||
4be44fcd | 708 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); |
1da177e4 LT |
709 | |
710 | *out_handle = lock_ptr; | |
711 | ||
4be44fcd | 712 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
713 | } |
714 | ||
1da177e4 LT |
715 | /* |
716 | * Deallocate the memory for a spinlock. | |
717 | */ | |
4be44fcd | 718 | void acpi_os_delete_lock(acpi_handle handle) |
1da177e4 | 719 | { |
4be44fcd | 720 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 | 721 | |
4be44fcd | 722 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); |
1da177e4 LT |
723 | |
724 | acpi_os_free(handle); | |
725 | ||
726 | return_VOID; | |
727 | } | |
728 | ||
1da177e4 | 729 | acpi_status |
4be44fcd | 730 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 731 | { |
4be44fcd | 732 | struct semaphore *sem = NULL; |
1da177e4 | 733 | |
4be44fcd | 734 | ACPI_FUNCTION_TRACE("os_create_semaphore"); |
1da177e4 LT |
735 | |
736 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
737 | if (!sem) | |
4be44fcd | 738 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
739 | memset(sem, 0, sizeof(struct semaphore)); |
740 | ||
741 | sema_init(sem, initial_units); | |
742 | ||
4be44fcd | 743 | *handle = (acpi_handle *) sem; |
1da177e4 | 744 | |
4be44fcd LB |
745 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
746 | *handle, initial_units)); | |
1da177e4 | 747 | |
4be44fcd | 748 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 749 | } |
1da177e4 | 750 | |
4be44fcd | 751 | EXPORT_SYMBOL(acpi_os_create_semaphore); |
1da177e4 LT |
752 | |
753 | /* | |
754 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
755 | * 'delete_semaphore()' function -- may result in an invalid | |
756 | * pointer dereference for non-synchronized consumers. Should | |
757 | * we at least check for blocked threads and signal/cancel them? | |
758 | */ | |
759 | ||
4be44fcd | 760 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 761 | { |
4be44fcd | 762 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 763 | |
4be44fcd | 764 | ACPI_FUNCTION_TRACE("os_delete_semaphore"); |
1da177e4 LT |
765 | |
766 | if (!sem) | |
4be44fcd | 767 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 | 768 | |
4be44fcd | 769 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 770 | |
4be44fcd LB |
771 | acpi_os_free(sem); |
772 | sem = NULL; | |
1da177e4 | 773 | |
4be44fcd | 774 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 775 | } |
1da177e4 | 776 | |
4be44fcd | 777 | EXPORT_SYMBOL(acpi_os_delete_semaphore); |
1da177e4 LT |
778 | |
779 | /* | |
780 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
781 | * improvise. The process is to sleep for one scheduler quantum | |
782 | * until the semaphore becomes available. Downside is that this | |
783 | * may result in starvation for timeout-based waits when there's | |
784 | * lots of semaphore activity. | |
785 | * | |
786 | * TODO: Support for units > 1? | |
787 | */ | |
4be44fcd | 788 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 789 | { |
4be44fcd LB |
790 | acpi_status status = AE_OK; |
791 | struct semaphore *sem = (struct semaphore *)handle; | |
792 | int ret = 0; | |
1da177e4 | 793 | |
4be44fcd | 794 | ACPI_FUNCTION_TRACE("os_wait_semaphore"); |
1da177e4 LT |
795 | |
796 | if (!sem || (units < 1)) | |
4be44fcd | 797 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
798 | |
799 | if (units > 1) | |
4be44fcd | 800 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 801 | |
4be44fcd LB |
802 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
803 | handle, units, timeout)); | |
1da177e4 LT |
804 | |
805 | if (in_atomic()) | |
806 | timeout = 0; | |
807 | ||
4be44fcd | 808 | switch (timeout) { |
1da177e4 LT |
809 | /* |
810 | * No Wait: | |
811 | * -------- | |
812 | * A zero timeout value indicates that we shouldn't wait - just | |
813 | * acquire the semaphore if available otherwise return AE_TIME | |
814 | * (a.k.a. 'would block'). | |
815 | */ | |
4be44fcd LB |
816 | case 0: |
817 | if (down_trylock(sem)) | |
1da177e4 LT |
818 | status = AE_TIME; |
819 | break; | |
820 | ||
821 | /* | |
822 | * Wait Indefinitely: | |
823 | * ------------------ | |
824 | */ | |
4be44fcd | 825 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
826 | down(sem); |
827 | break; | |
828 | ||
829 | /* | |
830 | * Wait w/ Timeout: | |
831 | * ---------------- | |
832 | */ | |
4be44fcd | 833 | default: |
1da177e4 LT |
834 | // TODO: A better timeout algorithm? |
835 | { | |
836 | int i = 0; | |
4be44fcd | 837 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
838 | |
839 | ret = down_trylock(sem); | |
840 | for (i = timeout; (i > 0 && ret < 0); i -= quantum_ms) { | |
841 | current->state = TASK_INTERRUPTIBLE; | |
842 | schedule_timeout(1); | |
843 | ret = down_trylock(sem); | |
844 | } | |
4be44fcd | 845 | |
1da177e4 LT |
846 | if (ret != 0) |
847 | status = AE_TIME; | |
848 | } | |
849 | break; | |
850 | } | |
851 | ||
852 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
853 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
854 | "Failed to acquire semaphore[%p|%d|%d], %s\n", | |
855 | handle, units, timeout, | |
856 | acpi_format_exception(status))); | |
857 | } else { | |
858 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
859 | "Acquired semaphore[%p|%d|%d]\n", handle, | |
860 | units, timeout)); | |
1da177e4 LT |
861 | } |
862 | ||
4be44fcd | 863 | return_ACPI_STATUS(status); |
1da177e4 | 864 | } |
1da177e4 | 865 | |
4be44fcd | 866 | EXPORT_SYMBOL(acpi_os_wait_semaphore); |
1da177e4 LT |
867 | |
868 | /* | |
869 | * TODO: Support for units > 1? | |
870 | */ | |
4be44fcd | 871 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 872 | { |
4be44fcd | 873 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 874 | |
4be44fcd | 875 | ACPI_FUNCTION_TRACE("os_signal_semaphore"); |
1da177e4 LT |
876 | |
877 | if (!sem || (units < 1)) | |
4be44fcd | 878 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
879 | |
880 | if (units > 1) | |
4be44fcd | 881 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 882 | |
4be44fcd LB |
883 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
884 | units)); | |
1da177e4 LT |
885 | |
886 | up(sem); | |
887 | ||
4be44fcd | 888 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 889 | } |
4be44fcd | 890 | |
1da177e4 LT |
891 | EXPORT_SYMBOL(acpi_os_signal_semaphore); |
892 | ||
893 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 894 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
895 | { |
896 | ||
897 | #ifdef ENABLE_DEBUGGER | |
898 | if (acpi_in_debugger) { | |
899 | u32 chars; | |
900 | ||
901 | kdb_read(buffer, sizeof(line_buf)); | |
902 | ||
903 | /* remove the CR kdb includes */ | |
904 | chars = strlen(buffer) - 1; | |
905 | buffer[chars] = '\0'; | |
906 | } | |
907 | #endif | |
908 | ||
909 | return 0; | |
910 | } | |
4be44fcd | 911 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
912 | |
913 | /* Assumes no unreadable holes inbetween */ | |
4be44fcd | 914 | u8 acpi_os_readable(void *ptr, acpi_size len) |
1da177e4 | 915 | { |
4be44fcd | 916 | #if defined(__i386__) || defined(__x86_64__) |
1da177e4 | 917 | char tmp; |
4be44fcd LB |
918 | return !__get_user(tmp, (char __user *)ptr) |
919 | && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1da177e4 LT |
920 | #endif |
921 | return 1; | |
922 | } | |
923 | ||
924 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 925 | u8 acpi_os_writable(void *ptr, acpi_size len) |
1da177e4 LT |
926 | { |
927 | /* could do dummy write (racy) or a kernel page table lookup. | |
928 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
929 | return 1; | |
930 | } | |
931 | #endif | |
932 | ||
4be44fcd | 933 | u32 acpi_os_get_thread_id(void) |
1da177e4 LT |
934 | { |
935 | if (!in_atomic()) | |
936 | return current->pid; | |
937 | ||
938 | return 0; | |
939 | } | |
940 | ||
4be44fcd | 941 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 942 | { |
4be44fcd | 943 | switch (function) { |
1da177e4 LT |
944 | case ACPI_SIGNAL_FATAL: |
945 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
946 | break; | |
947 | case ACPI_SIGNAL_BREAKPOINT: | |
948 | /* | |
949 | * AML Breakpoint | |
950 | * ACPI spec. says to treat it as a NOP unless | |
951 | * you are debugging. So if/when we integrate | |
952 | * AML debugger into the kernel debugger its | |
953 | * hook will go here. But until then it is | |
954 | * not useful to print anything on breakpoints. | |
955 | */ | |
956 | break; | |
957 | default: | |
958 | break; | |
959 | } | |
960 | ||
961 | return AE_OK; | |
962 | } | |
4be44fcd | 963 | |
1da177e4 LT |
964 | EXPORT_SYMBOL(acpi_os_signal); |
965 | ||
4be44fcd | 966 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
967 | { |
968 | char *p = acpi_os_name; | |
4be44fcd | 969 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
970 | |
971 | if (!str || !*str) | |
972 | return 0; | |
973 | ||
974 | for (; count-- && str && *str; str++) { | |
975 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
976 | *p++ = *str; | |
977 | else if (*str == '\'' || *str == '"') | |
978 | continue; | |
979 | else | |
980 | break; | |
981 | } | |
982 | *p = 0; | |
983 | ||
984 | return 1; | |
4be44fcd | 985 | |
1da177e4 LT |
986 | } |
987 | ||
988 | __setup("acpi_os_name=", acpi_os_name_setup); | |
989 | ||
990 | /* | |
991 | * _OSI control | |
992 | * empty string disables _OSI | |
993 | * TBD additional string adds to _OSI | |
994 | */ | |
4be44fcd | 995 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
996 | { |
997 | if (str == NULL || *str == '\0') { | |
998 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
999 | acpi_gbl_create_osi_method = FALSE; | |
4be44fcd | 1000 | } else { |
1da177e4 | 1001 | /* TBD */ |
4be44fcd LB |
1002 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", |
1003 | str); | |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | return 1; | |
1007 | } | |
1008 | ||
1009 | __setup("acpi_osi=", acpi_osi_setup); | |
1010 | ||
1011 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1012 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1013 | { |
1014 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1015 | ||
1016 | acpi_gbl_all_methods_serialized = TRUE; | |
1017 | ||
1018 | return 1; | |
1019 | } | |
1020 | ||
1021 | __setup("acpi_serialize", acpi_serialize_setup); | |
1022 | ||
1023 | /* | |
1024 | * Wake and Run-Time GPES are expected to be separate. | |
1025 | * We disable wake-GPEs at run-time to prevent spurious | |
1026 | * interrupts. | |
1027 | * | |
1028 | * However, if a system exists that shares Wake and | |
1029 | * Run-time events on the same GPE this flag is available | |
1030 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1031 | */ | |
4be44fcd | 1032 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1033 | { |
1034 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1035 | ||
1036 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1037 | ||
1038 | return 1; | |
1039 | } | |
1040 | ||
1041 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1042 | ||
8713cbef | 1043 | static int __init acpi_hotkey_setup(char *str) |
fb9802fa | 1044 | { |
30e332f3 | 1045 | acpi_specific_hotkey_enabled = FALSE; |
fb9802fa LY |
1046 | return 1; |
1047 | } | |
1048 | ||
30e332f3 | 1049 | __setup("acpi_generic_hotkey", acpi_hotkey_setup); |
fb9802fa | 1050 | |
1da177e4 LT |
1051 | /* |
1052 | * max_cstate is defined in the base kernel so modules can | |
1053 | * change it w/o depending on the state of the processor module. | |
1054 | */ | |
1055 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1056 | ||
1da177e4 | 1057 | EXPORT_SYMBOL(max_cstate); |
73459f73 RM |
1058 | |
1059 | /* | |
1060 | * Acquire a spinlock. | |
1061 | * | |
1062 | * handle is a pointer to the spinlock_t. | |
1063 | * flags is *not* the result of save_flags - it is an ACPI-specific flag variable | |
1064 | * that indicates whether we are at interrupt level. | |
1065 | */ | |
1066 | ||
4be44fcd | 1067 | unsigned long acpi_os_acquire_lock(acpi_handle handle) |
73459f73 RM |
1068 | { |
1069 | unsigned long flags; | |
4be44fcd | 1070 | spin_lock_irqsave((spinlock_t *) handle, flags); |
73459f73 RM |
1071 | return flags; |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * Release a spinlock. See above. | |
1076 | */ | |
1077 | ||
4be44fcd | 1078 | void acpi_os_release_lock(acpi_handle handle, unsigned long flags) |
73459f73 | 1079 | { |
4be44fcd | 1080 | spin_unlock_irqrestore((spinlock_t *) handle, flags); |
73459f73 RM |
1081 | } |
1082 | ||
73459f73 RM |
1083 | #ifndef ACPI_USE_LOCAL_CACHE |
1084 | ||
1085 | /******************************************************************************* | |
1086 | * | |
1087 | * FUNCTION: acpi_os_create_cache | |
1088 | * | |
1089 | * PARAMETERS: CacheName - Ascii name for the cache | |
1090 | * ObjectSize - Size of each cached object | |
1091 | * MaxDepth - Maximum depth of the cache (in objects) | |
1092 | * ReturnCache - Where the new cache object is returned | |
1093 | * | |
1094 | * RETURN: Status | |
1095 | * | |
1096 | * DESCRIPTION: Create a cache object | |
1097 | * | |
1098 | ******************************************************************************/ | |
1099 | ||
1100 | acpi_status | |
4be44fcd | 1101 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1102 | { |
4be44fcd | 1103 | *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL); |
73459f73 RM |
1104 | return AE_OK; |
1105 | } | |
1106 | ||
1107 | /******************************************************************************* | |
1108 | * | |
1109 | * FUNCTION: acpi_os_purge_cache | |
1110 | * | |
1111 | * PARAMETERS: Cache - Handle to cache object | |
1112 | * | |
1113 | * RETURN: Status | |
1114 | * | |
1115 | * DESCRIPTION: Free all objects within the requested cache. | |
1116 | * | |
1117 | ******************************************************************************/ | |
1118 | ||
4be44fcd | 1119 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1120 | { |
4be44fcd LB |
1121 | (void)kmem_cache_shrink(cache); |
1122 | return (AE_OK); | |
73459f73 RM |
1123 | } |
1124 | ||
1125 | /******************************************************************************* | |
1126 | * | |
1127 | * FUNCTION: acpi_os_delete_cache | |
1128 | * | |
1129 | * PARAMETERS: Cache - Handle to cache object | |
1130 | * | |
1131 | * RETURN: Status | |
1132 | * | |
1133 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1134 | * cache object. | |
1135 | * | |
1136 | ******************************************************************************/ | |
1137 | ||
4be44fcd | 1138 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1139 | { |
4be44fcd LB |
1140 | (void)kmem_cache_destroy(cache); |
1141 | return (AE_OK); | |
73459f73 RM |
1142 | } |
1143 | ||
1144 | /******************************************************************************* | |
1145 | * | |
1146 | * FUNCTION: acpi_os_release_object | |
1147 | * | |
1148 | * PARAMETERS: Cache - Handle to cache object | |
1149 | * Object - The object to be released | |
1150 | * | |
1151 | * RETURN: None | |
1152 | * | |
1153 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1154 | * the object is deleted. | |
1155 | * | |
1156 | ******************************************************************************/ | |
1157 | ||
4be44fcd | 1158 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1159 | { |
4be44fcd LB |
1160 | kmem_cache_free(cache, object); |
1161 | return (AE_OK); | |
73459f73 RM |
1162 | } |
1163 | ||
1164 | /******************************************************************************* | |
1165 | * | |
1166 | * FUNCTION: acpi_os_acquire_object | |
1167 | * | |
1168 | * PARAMETERS: Cache - Handle to cache object | |
1169 | * ReturnObject - Where the object is returned | |
1170 | * | |
1171 | * RETURN: Status | |
1172 | * | |
1173 | * DESCRIPTION: Get an object from the specified cache. If cache is empty, | |
1174 | * the object is allocated. | |
1175 | * | |
1176 | ******************************************************************************/ | |
1177 | ||
4be44fcd | 1178 | void *acpi_os_acquire_object(acpi_cache_t * cache) |
73459f73 | 1179 | { |
4be44fcd LB |
1180 | void *object = kmem_cache_alloc(cache, GFP_KERNEL); |
1181 | WARN_ON(!object); | |
1182 | return object; | |
73459f73 RM |
1183 | } |
1184 | ||
1185 | #endif |