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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 | 315 | { |
01a527ec | 316 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 317 | } |
4be44fcd | 318 | |
1da177e4 LT |
319 | EXPORT_SYMBOL(acpi_os_sleep); |
320 | ||
4be44fcd | 321 | void acpi_os_stall(u32 us) |
1da177e4 LT |
322 | { |
323 | while (us) { | |
324 | u32 delay = 1000; | |
325 | ||
326 | if (delay > us) | |
327 | delay = us; | |
328 | udelay(delay); | |
329 | touch_nmi_watchdog(); | |
330 | us -= delay; | |
331 | } | |
332 | } | |
4be44fcd | 333 | |
1da177e4 LT |
334 | EXPORT_SYMBOL(acpi_os_stall); |
335 | ||
336 | /* | |
337 | * Support ACPI 3.0 AML Timer operand | |
338 | * Returns 64-bit free-running, monotonically increasing timer | |
339 | * with 100ns granularity | |
340 | */ | |
4be44fcd | 341 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
342 | { |
343 | static u64 t; | |
344 | ||
345 | #ifdef CONFIG_HPET | |
346 | /* TBD: use HPET if available */ | |
347 | #endif | |
348 | ||
349 | #ifdef CONFIG_X86_PM_TIMER | |
350 | /* TBD: default to PM timer if HPET was not available */ | |
351 | #endif | |
352 | if (!t) | |
353 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
354 | ||
355 | return ++t; | |
356 | } | |
357 | ||
4be44fcd | 358 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
359 | { |
360 | u32 dummy; | |
361 | ||
362 | if (!value) | |
363 | value = &dummy; | |
364 | ||
4be44fcd | 365 | switch (width) { |
1da177e4 | 366 | case 8: |
4be44fcd | 367 | *(u8 *) value = inb(port); |
1da177e4 LT |
368 | break; |
369 | case 16: | |
4be44fcd | 370 | *(u16 *) value = inw(port); |
1da177e4 LT |
371 | break; |
372 | case 32: | |
4be44fcd | 373 | *(u32 *) value = inl(port); |
1da177e4 LT |
374 | break; |
375 | default: | |
376 | BUG(); | |
377 | } | |
378 | ||
379 | return AE_OK; | |
380 | } | |
4be44fcd | 381 | |
1da177e4 LT |
382 | EXPORT_SYMBOL(acpi_os_read_port); |
383 | ||
4be44fcd | 384 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 385 | { |
4be44fcd | 386 | switch (width) { |
1da177e4 LT |
387 | case 8: |
388 | outb(value, port); | |
389 | break; | |
390 | case 16: | |
391 | outw(value, port); | |
392 | break; | |
393 | case 32: | |
394 | outl(value, port); | |
395 | break; | |
396 | default: | |
397 | BUG(); | |
398 | } | |
399 | ||
400 | return AE_OK; | |
401 | } | |
4be44fcd | 402 | |
1da177e4 LT |
403 | EXPORT_SYMBOL(acpi_os_write_port); |
404 | ||
405 | acpi_status | |
4be44fcd | 406 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 407 | { |
4be44fcd LB |
408 | u32 dummy; |
409 | void __iomem *virt_addr; | |
410 | int iomem = 0; | |
1da177e4 LT |
411 | |
412 | if (efi_enabled) { | |
413 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
414 | /* HACK ALERT! We can use readb/w/l on real memory too.. */ | |
4be44fcd | 415 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
416 | } else { |
417 | iomem = 1; | |
418 | virt_addr = ioremap(phys_addr, width); | |
419 | } | |
420 | } else | |
4be44fcd | 421 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
422 | if (!value) |
423 | value = &dummy; | |
424 | ||
425 | switch (width) { | |
426 | case 8: | |
4be44fcd | 427 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
428 | break; |
429 | case 16: | |
4be44fcd | 430 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
431 | break; |
432 | case 32: | |
4be44fcd | 433 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
434 | break; |
435 | default: | |
436 | BUG(); | |
437 | } | |
438 | ||
439 | if (efi_enabled) { | |
440 | if (iomem) | |
441 | iounmap(virt_addr); | |
442 | } | |
443 | ||
444 | return AE_OK; | |
445 | } | |
446 | ||
447 | acpi_status | |
4be44fcd | 448 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 449 | { |
4be44fcd LB |
450 | void __iomem *virt_addr; |
451 | int iomem = 0; | |
1da177e4 LT |
452 | |
453 | if (efi_enabled) { | |
454 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
455 | /* HACK ALERT! We can use writeb/w/l on real memory too */ | |
4be44fcd | 456 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
457 | } else { |
458 | iomem = 1; | |
459 | virt_addr = ioremap(phys_addr, width); | |
460 | } | |
461 | } else | |
4be44fcd | 462 | virt_addr = (void __iomem *)phys_to_virt(phys_addr); |
1da177e4 LT |
463 | |
464 | switch (width) { | |
465 | case 8: | |
466 | writeb(value, virt_addr); | |
467 | break; | |
468 | case 16: | |
469 | writew(value, virt_addr); | |
470 | break; | |
471 | case 32: | |
472 | writel(value, virt_addr); | |
473 | break; | |
474 | default: | |
475 | BUG(); | |
476 | } | |
477 | ||
478 | if (iomem) | |
479 | iounmap(virt_addr); | |
480 | ||
481 | return AE_OK; | |
482 | } | |
483 | ||
1da177e4 | 484 | acpi_status |
4be44fcd LB |
485 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
486 | void *value, u32 width) | |
1da177e4 LT |
487 | { |
488 | int result, size; | |
489 | ||
490 | if (!value) | |
491 | return AE_BAD_PARAMETER; | |
492 | ||
493 | switch (width) { | |
494 | case 8: | |
495 | size = 1; | |
496 | break; | |
497 | case 16: | |
498 | size = 2; | |
499 | break; | |
500 | case 32: | |
501 | size = 4; | |
502 | break; | |
503 | default: | |
504 | return AE_ERROR; | |
505 | } | |
506 | ||
507 | BUG_ON(!raw_pci_ops); | |
508 | ||
509 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
510 | PCI_DEVFN(pci_id->device, pci_id->function), |
511 | reg, size, value); | |
1da177e4 LT |
512 | |
513 | return (result ? AE_ERROR : AE_OK); | |
514 | } | |
4be44fcd | 515 | |
1da177e4 LT |
516 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
517 | ||
518 | acpi_status | |
4be44fcd LB |
519 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
520 | acpi_integer value, u32 width) | |
1da177e4 LT |
521 | { |
522 | int result, size; | |
523 | ||
524 | switch (width) { | |
525 | case 8: | |
526 | size = 1; | |
527 | break; | |
528 | case 16: | |
529 | size = 2; | |
530 | break; | |
531 | case 32: | |
532 | size = 4; | |
533 | break; | |
534 | default: | |
535 | return AE_ERROR; | |
536 | } | |
537 | ||
538 | BUG_ON(!raw_pci_ops); | |
539 | ||
540 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
541 | PCI_DEVFN(pci_id->device, pci_id->function), |
542 | reg, size, value); | |
1da177e4 LT |
543 | |
544 | return (result ? AE_ERROR : AE_OK); | |
545 | } | |
546 | ||
547 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
548 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
549 | acpi_handle chandle, /* current node */ | |
550 | struct acpi_pci_id **id, | |
551 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 552 | { |
4be44fcd LB |
553 | acpi_handle handle; |
554 | struct acpi_pci_id *pci_id = *id; | |
555 | acpi_status status; | |
556 | unsigned long temp; | |
557 | acpi_object_type type; | |
558 | u8 tu8; | |
1da177e4 LT |
559 | |
560 | acpi_get_parent(chandle, &handle); | |
561 | if (handle != rhandle) { | |
4be44fcd LB |
562 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
563 | bus_number); | |
1da177e4 LT |
564 | |
565 | status = acpi_get_type(handle, &type); | |
4be44fcd | 566 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
567 | return; |
568 | ||
4be44fcd LB |
569 | status = |
570 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
571 | &temp); | |
1da177e4 | 572 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
573 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
574 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
575 | |
576 | if (*is_bridge) | |
577 | pci_id->bus = *bus_number; | |
578 | ||
579 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
580 | status = |
581 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
582 | 8); | |
583 | if (ACPI_SUCCESS(status) | |
584 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
585 | status = | |
586 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
587 | &tu8, 8); | |
1da177e4 LT |
588 | if (!ACPI_SUCCESS(status)) { |
589 | /* Certainly broken... FIX ME */ | |
590 | return; | |
591 | } | |
592 | *is_bridge = 1; | |
593 | pci_id->bus = tu8; | |
4be44fcd LB |
594 | status = |
595 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
596 | &tu8, 8); | |
1da177e4 LT |
597 | if (ACPI_SUCCESS(status)) { |
598 | *bus_number = tu8; | |
599 | } | |
600 | } else | |
601 | *is_bridge = 0; | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
4be44fcd LB |
606 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
607 | acpi_handle chandle, /* current node */ | |
608 | struct acpi_pci_id **id) | |
1da177e4 LT |
609 | { |
610 | int is_bridge = 1; | |
611 | u8 bus_number = (*id)->bus; | |
612 | ||
613 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
614 | } | |
615 | ||
4be44fcd | 616 | static void acpi_os_execute_deferred(void *context) |
1da177e4 | 617 | { |
4be44fcd | 618 | struct acpi_os_dpc *dpc = NULL; |
1da177e4 | 619 | |
4be44fcd | 620 | ACPI_FUNCTION_TRACE("os_execute_deferred"); |
1da177e4 | 621 | |
4be44fcd | 622 | dpc = (struct acpi_os_dpc *)context; |
1da177e4 | 623 | if (!dpc) { |
4be44fcd | 624 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); |
1da177e4 LT |
625 | return_VOID; |
626 | } | |
627 | ||
628 | dpc->function(dpc->context); | |
629 | ||
630 | kfree(dpc); | |
631 | ||
632 | return_VOID; | |
633 | } | |
634 | ||
635 | acpi_status | |
4be44fcd LB |
636 | acpi_os_queue_for_execution(u32 priority, |
637 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 638 | { |
4be44fcd LB |
639 | acpi_status status = AE_OK; |
640 | struct acpi_os_dpc *dpc; | |
641 | struct work_struct *task; | |
1da177e4 | 642 | |
4be44fcd | 643 | ACPI_FUNCTION_TRACE("os_queue_for_execution"); |
1da177e4 | 644 | |
4be44fcd LB |
645 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
646 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
647 | function, context)); | |
1da177e4 LT |
648 | |
649 | if (!function) | |
4be44fcd | 650 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
651 | |
652 | /* | |
653 | * Allocate/initialize DPC structure. Note that this memory will be | |
654 | * freed by the callee. The kernel handles the tq_struct list in a | |
655 | * way that allows us to also free its memory inside the callee. | |
656 | * Because we may want to schedule several tasks with different | |
657 | * parameters we can't use the approach some kernel code uses of | |
658 | * having a static tq_struct. | |
659 | * We can save time and code by allocating the DPC and tq_structs | |
660 | * from the same memory. | |
661 | */ | |
662 | ||
4be44fcd LB |
663 | dpc = |
664 | kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct), | |
665 | GFP_ATOMIC); | |
1da177e4 | 666 | if (!dpc) |
4be44fcd | 667 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
668 | |
669 | dpc->function = function; | |
670 | dpc->context = context; | |
671 | ||
4be44fcd LB |
672 | task = (void *)(dpc + 1); |
673 | INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); | |
1da177e4 LT |
674 | |
675 | if (!queue_work(kacpid_wq, task)) { | |
4be44fcd LB |
676 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
677 | "Call to queue_work() failed.\n")); | |
1da177e4 LT |
678 | kfree(dpc); |
679 | status = AE_ERROR; | |
680 | } | |
681 | ||
4be44fcd | 682 | return_ACPI_STATUS(status); |
1da177e4 | 683 | } |
4be44fcd | 684 | |
1da177e4 LT |
685 | EXPORT_SYMBOL(acpi_os_queue_for_execution); |
686 | ||
4be44fcd | 687 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
688 | { |
689 | flush_workqueue(kacpid_wq); | |
690 | } | |
4be44fcd | 691 | |
1da177e4 LT |
692 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
693 | ||
694 | /* | |
695 | * Allocate the memory for a spinlock and initialize it. | |
696 | */ | |
4be44fcd | 697 | acpi_status acpi_os_create_lock(acpi_handle * out_handle) |
1da177e4 LT |
698 | { |
699 | spinlock_t *lock_ptr; | |
700 | ||
4be44fcd | 701 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 LT |
702 | |
703 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
704 | ||
705 | spin_lock_init(lock_ptr); | |
706 | ||
4be44fcd | 707 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); |
1da177e4 LT |
708 | |
709 | *out_handle = lock_ptr; | |
710 | ||
4be44fcd | 711 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
712 | } |
713 | ||
1da177e4 LT |
714 | /* |
715 | * Deallocate the memory for a spinlock. | |
716 | */ | |
4be44fcd | 717 | void acpi_os_delete_lock(acpi_handle handle) |
1da177e4 | 718 | { |
4be44fcd | 719 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 | 720 | |
4be44fcd | 721 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); |
1da177e4 LT |
722 | |
723 | acpi_os_free(handle); | |
724 | ||
725 | return_VOID; | |
726 | } | |
727 | ||
1da177e4 | 728 | acpi_status |
4be44fcd | 729 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 730 | { |
4be44fcd | 731 | struct semaphore *sem = NULL; |
1da177e4 | 732 | |
4be44fcd | 733 | ACPI_FUNCTION_TRACE("os_create_semaphore"); |
1da177e4 LT |
734 | |
735 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
736 | if (!sem) | |
4be44fcd | 737 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
738 | memset(sem, 0, sizeof(struct semaphore)); |
739 | ||
740 | sema_init(sem, initial_units); | |
741 | ||
4be44fcd | 742 | *handle = (acpi_handle *) sem; |
1da177e4 | 743 | |
4be44fcd LB |
744 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
745 | *handle, initial_units)); | |
1da177e4 | 746 | |
4be44fcd | 747 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 748 | } |
1da177e4 | 749 | |
4be44fcd | 750 | EXPORT_SYMBOL(acpi_os_create_semaphore); |
1da177e4 LT |
751 | |
752 | /* | |
753 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
754 | * 'delete_semaphore()' function -- may result in an invalid | |
755 | * pointer dereference for non-synchronized consumers. Should | |
756 | * we at least check for blocked threads and signal/cancel them? | |
757 | */ | |
758 | ||
4be44fcd | 759 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 760 | { |
4be44fcd | 761 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 762 | |
4be44fcd | 763 | ACPI_FUNCTION_TRACE("os_delete_semaphore"); |
1da177e4 LT |
764 | |
765 | if (!sem) | |
4be44fcd | 766 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 | 767 | |
4be44fcd | 768 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 769 | |
4be44fcd LB |
770 | acpi_os_free(sem); |
771 | sem = NULL; | |
1da177e4 | 772 | |
4be44fcd | 773 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 774 | } |
1da177e4 | 775 | |
4be44fcd | 776 | EXPORT_SYMBOL(acpi_os_delete_semaphore); |
1da177e4 LT |
777 | |
778 | /* | |
779 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
780 | * improvise. The process is to sleep for one scheduler quantum | |
781 | * until the semaphore becomes available. Downside is that this | |
782 | * may result in starvation for timeout-based waits when there's | |
783 | * lots of semaphore activity. | |
784 | * | |
785 | * TODO: Support for units > 1? | |
786 | */ | |
4be44fcd | 787 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 788 | { |
4be44fcd LB |
789 | acpi_status status = AE_OK; |
790 | struct semaphore *sem = (struct semaphore *)handle; | |
791 | int ret = 0; | |
1da177e4 | 792 | |
4be44fcd | 793 | ACPI_FUNCTION_TRACE("os_wait_semaphore"); |
1da177e4 LT |
794 | |
795 | if (!sem || (units < 1)) | |
4be44fcd | 796 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
797 | |
798 | if (units > 1) | |
4be44fcd | 799 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 800 | |
4be44fcd LB |
801 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
802 | handle, units, timeout)); | |
1da177e4 LT |
803 | |
804 | if (in_atomic()) | |
805 | timeout = 0; | |
806 | ||
4be44fcd | 807 | switch (timeout) { |
1da177e4 LT |
808 | /* |
809 | * No Wait: | |
810 | * -------- | |
811 | * A zero timeout value indicates that we shouldn't wait - just | |
812 | * acquire the semaphore if available otherwise return AE_TIME | |
813 | * (a.k.a. 'would block'). | |
814 | */ | |
4be44fcd LB |
815 | case 0: |
816 | if (down_trylock(sem)) | |
1da177e4 LT |
817 | status = AE_TIME; |
818 | break; | |
819 | ||
820 | /* | |
821 | * Wait Indefinitely: | |
822 | * ------------------ | |
823 | */ | |
4be44fcd | 824 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
825 | down(sem); |
826 | break; | |
827 | ||
828 | /* | |
829 | * Wait w/ Timeout: | |
830 | * ---------------- | |
831 | */ | |
4be44fcd | 832 | default: |
1da177e4 LT |
833 | // TODO: A better timeout algorithm? |
834 | { | |
835 | int i = 0; | |
4be44fcd | 836 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
837 | |
838 | ret = down_trylock(sem); | |
839 | for (i = timeout; (i > 0 && ret < 0); i -= quantum_ms) { | |
01a527ec | 840 | schedule_timeout_interruptible(1); |
1da177e4 LT |
841 | ret = down_trylock(sem); |
842 | } | |
4be44fcd | 843 | |
1da177e4 LT |
844 | if (ret != 0) |
845 | status = AE_TIME; | |
846 | } | |
847 | break; | |
848 | } | |
849 | ||
850 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
851 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
852 | "Failed to acquire semaphore[%p|%d|%d], %s\n", | |
853 | handle, units, timeout, | |
854 | acpi_format_exception(status))); | |
855 | } else { | |
856 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
857 | "Acquired semaphore[%p|%d|%d]\n", handle, | |
858 | units, timeout)); | |
1da177e4 LT |
859 | } |
860 | ||
4be44fcd | 861 | return_ACPI_STATUS(status); |
1da177e4 | 862 | } |
1da177e4 | 863 | |
4be44fcd | 864 | EXPORT_SYMBOL(acpi_os_wait_semaphore); |
1da177e4 LT |
865 | |
866 | /* | |
867 | * TODO: Support for units > 1? | |
868 | */ | |
4be44fcd | 869 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 870 | { |
4be44fcd | 871 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 872 | |
4be44fcd | 873 | ACPI_FUNCTION_TRACE("os_signal_semaphore"); |
1da177e4 LT |
874 | |
875 | if (!sem || (units < 1)) | |
4be44fcd | 876 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
877 | |
878 | if (units > 1) | |
4be44fcd | 879 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 880 | |
4be44fcd LB |
881 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
882 | units)); | |
1da177e4 LT |
883 | |
884 | up(sem); | |
885 | ||
4be44fcd | 886 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 887 | } |
4be44fcd | 888 | |
1da177e4 LT |
889 | EXPORT_SYMBOL(acpi_os_signal_semaphore); |
890 | ||
891 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 892 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
893 | { |
894 | ||
895 | #ifdef ENABLE_DEBUGGER | |
896 | if (acpi_in_debugger) { | |
897 | u32 chars; | |
898 | ||
899 | kdb_read(buffer, sizeof(line_buf)); | |
900 | ||
901 | /* remove the CR kdb includes */ | |
902 | chars = strlen(buffer) - 1; | |
903 | buffer[chars] = '\0'; | |
904 | } | |
905 | #endif | |
906 | ||
907 | return 0; | |
908 | } | |
4be44fcd | 909 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
910 | |
911 | /* Assumes no unreadable holes inbetween */ | |
4be44fcd | 912 | u8 acpi_os_readable(void *ptr, acpi_size len) |
1da177e4 | 913 | { |
4be44fcd | 914 | #if defined(__i386__) || defined(__x86_64__) |
1da177e4 | 915 | char tmp; |
4be44fcd LB |
916 | return !__get_user(tmp, (char __user *)ptr) |
917 | && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1da177e4 LT |
918 | #endif |
919 | return 1; | |
920 | } | |
921 | ||
922 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 923 | u8 acpi_os_writable(void *ptr, acpi_size len) |
1da177e4 LT |
924 | { |
925 | /* could do dummy write (racy) or a kernel page table lookup. | |
926 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
927 | return 1; | |
928 | } | |
929 | #endif | |
930 | ||
4be44fcd | 931 | u32 acpi_os_get_thread_id(void) |
1da177e4 LT |
932 | { |
933 | if (!in_atomic()) | |
934 | return current->pid; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
4be44fcd | 939 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 940 | { |
4be44fcd | 941 | switch (function) { |
1da177e4 LT |
942 | case ACPI_SIGNAL_FATAL: |
943 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
944 | break; | |
945 | case ACPI_SIGNAL_BREAKPOINT: | |
946 | /* | |
947 | * AML Breakpoint | |
948 | * ACPI spec. says to treat it as a NOP unless | |
949 | * you are debugging. So if/when we integrate | |
950 | * AML debugger into the kernel debugger its | |
951 | * hook will go here. But until then it is | |
952 | * not useful to print anything on breakpoints. | |
953 | */ | |
954 | break; | |
955 | default: | |
956 | break; | |
957 | } | |
958 | ||
959 | return AE_OK; | |
960 | } | |
4be44fcd | 961 | |
1da177e4 LT |
962 | EXPORT_SYMBOL(acpi_os_signal); |
963 | ||
4be44fcd | 964 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
965 | { |
966 | char *p = acpi_os_name; | |
4be44fcd | 967 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
968 | |
969 | if (!str || !*str) | |
970 | return 0; | |
971 | ||
972 | for (; count-- && str && *str; str++) { | |
973 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
974 | *p++ = *str; | |
975 | else if (*str == '\'' || *str == '"') | |
976 | continue; | |
977 | else | |
978 | break; | |
979 | } | |
980 | *p = 0; | |
981 | ||
982 | return 1; | |
4be44fcd | 983 | |
1da177e4 LT |
984 | } |
985 | ||
986 | __setup("acpi_os_name=", acpi_os_name_setup); | |
987 | ||
988 | /* | |
989 | * _OSI control | |
990 | * empty string disables _OSI | |
991 | * TBD additional string adds to _OSI | |
992 | */ | |
4be44fcd | 993 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
994 | { |
995 | if (str == NULL || *str == '\0') { | |
996 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
997 | acpi_gbl_create_osi_method = FALSE; | |
4be44fcd | 998 | } else { |
1da177e4 | 999 | /* TBD */ |
4be44fcd LB |
1000 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", |
1001 | str); | |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | return 1; | |
1005 | } | |
1006 | ||
1007 | __setup("acpi_osi=", acpi_osi_setup); | |
1008 | ||
1009 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1010 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1011 | { |
1012 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1013 | ||
1014 | acpi_gbl_all_methods_serialized = TRUE; | |
1015 | ||
1016 | return 1; | |
1017 | } | |
1018 | ||
1019 | __setup("acpi_serialize", acpi_serialize_setup); | |
1020 | ||
1021 | /* | |
1022 | * Wake and Run-Time GPES are expected to be separate. | |
1023 | * We disable wake-GPEs at run-time to prevent spurious | |
1024 | * interrupts. | |
1025 | * | |
1026 | * However, if a system exists that shares Wake and | |
1027 | * Run-time events on the same GPE this flag is available | |
1028 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1029 | */ | |
4be44fcd | 1030 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1031 | { |
1032 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1033 | ||
1034 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1035 | ||
1036 | return 1; | |
1037 | } | |
1038 | ||
1039 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1040 | ||
8713cbef | 1041 | static int __init acpi_hotkey_setup(char *str) |
fb9802fa | 1042 | { |
30e332f3 | 1043 | acpi_specific_hotkey_enabled = FALSE; |
fb9802fa LY |
1044 | return 1; |
1045 | } | |
1046 | ||
30e332f3 | 1047 | __setup("acpi_generic_hotkey", acpi_hotkey_setup); |
fb9802fa | 1048 | |
1da177e4 LT |
1049 | /* |
1050 | * max_cstate is defined in the base kernel so modules can | |
1051 | * change it w/o depending on the state of the processor module. | |
1052 | */ | |
1053 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1054 | ||
1da177e4 | 1055 | EXPORT_SYMBOL(max_cstate); |
73459f73 RM |
1056 | |
1057 | /* | |
1058 | * Acquire a spinlock. | |
1059 | * | |
1060 | * handle is a pointer to the spinlock_t. | |
1061 | * flags is *not* the result of save_flags - it is an ACPI-specific flag variable | |
1062 | * that indicates whether we are at interrupt level. | |
1063 | */ | |
1064 | ||
4be44fcd | 1065 | unsigned long acpi_os_acquire_lock(acpi_handle handle) |
73459f73 RM |
1066 | { |
1067 | unsigned long flags; | |
4be44fcd | 1068 | spin_lock_irqsave((spinlock_t *) handle, flags); |
73459f73 RM |
1069 | return flags; |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Release a spinlock. See above. | |
1074 | */ | |
1075 | ||
4be44fcd | 1076 | void acpi_os_release_lock(acpi_handle handle, unsigned long flags) |
73459f73 | 1077 | { |
4be44fcd | 1078 | spin_unlock_irqrestore((spinlock_t *) handle, flags); |
73459f73 RM |
1079 | } |
1080 | ||
73459f73 RM |
1081 | #ifndef ACPI_USE_LOCAL_CACHE |
1082 | ||
1083 | /******************************************************************************* | |
1084 | * | |
1085 | * FUNCTION: acpi_os_create_cache | |
1086 | * | |
1087 | * PARAMETERS: CacheName - Ascii name for the cache | |
1088 | * ObjectSize - Size of each cached object | |
1089 | * MaxDepth - Maximum depth of the cache (in objects) | |
1090 | * ReturnCache - Where the new cache object is returned | |
1091 | * | |
1092 | * RETURN: Status | |
1093 | * | |
1094 | * DESCRIPTION: Create a cache object | |
1095 | * | |
1096 | ******************************************************************************/ | |
1097 | ||
1098 | acpi_status | |
4be44fcd | 1099 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1100 | { |
4be44fcd | 1101 | *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL); |
73459f73 RM |
1102 | return AE_OK; |
1103 | } | |
1104 | ||
1105 | /******************************************************************************* | |
1106 | * | |
1107 | * FUNCTION: acpi_os_purge_cache | |
1108 | * | |
1109 | * PARAMETERS: Cache - Handle to cache object | |
1110 | * | |
1111 | * RETURN: Status | |
1112 | * | |
1113 | * DESCRIPTION: Free all objects within the requested cache. | |
1114 | * | |
1115 | ******************************************************************************/ | |
1116 | ||
4be44fcd | 1117 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1118 | { |
4be44fcd LB |
1119 | (void)kmem_cache_shrink(cache); |
1120 | return (AE_OK); | |
73459f73 RM |
1121 | } |
1122 | ||
1123 | /******************************************************************************* | |
1124 | * | |
1125 | * FUNCTION: acpi_os_delete_cache | |
1126 | * | |
1127 | * PARAMETERS: Cache - Handle to cache object | |
1128 | * | |
1129 | * RETURN: Status | |
1130 | * | |
1131 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1132 | * cache object. | |
1133 | * | |
1134 | ******************************************************************************/ | |
1135 | ||
4be44fcd | 1136 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1137 | { |
4be44fcd LB |
1138 | (void)kmem_cache_destroy(cache); |
1139 | return (AE_OK); | |
73459f73 RM |
1140 | } |
1141 | ||
1142 | /******************************************************************************* | |
1143 | * | |
1144 | * FUNCTION: acpi_os_release_object | |
1145 | * | |
1146 | * PARAMETERS: Cache - Handle to cache object | |
1147 | * Object - The object to be released | |
1148 | * | |
1149 | * RETURN: None | |
1150 | * | |
1151 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1152 | * the object is deleted. | |
1153 | * | |
1154 | ******************************************************************************/ | |
1155 | ||
4be44fcd | 1156 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1157 | { |
4be44fcd LB |
1158 | kmem_cache_free(cache, object); |
1159 | return (AE_OK); | |
73459f73 RM |
1160 | } |
1161 | ||
1162 | /******************************************************************************* | |
1163 | * | |
1164 | * FUNCTION: acpi_os_acquire_object | |
1165 | * | |
1166 | * PARAMETERS: Cache - Handle to cache object | |
1167 | * ReturnObject - Where the object is returned | |
1168 | * | |
1169 | * RETURN: Status | |
1170 | * | |
1171 | * DESCRIPTION: Get an object from the specified cache. If cache is empty, | |
1172 | * the object is allocated. | |
1173 | * | |
1174 | ******************************************************************************/ | |
1175 | ||
4be44fcd | 1176 | void *acpi_os_acquire_object(acpi_cache_t * cache) |
73459f73 | 1177 | { |
4be44fcd LB |
1178 | void *object = kmem_cache_alloc(cache, GFP_KERNEL); |
1179 | WARN_ON(!object); | |
1180 | return object; | |
73459f73 RM |
1181 | } |
1182 | ||
1183 | #endif |