osl.c 33.7 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6
/*
 *  acpi_osl.c - OS-dependent functions ($Revision: 83 $)
 *
 *  Copyright (C) 2000       Andrew Henroid
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 8
 *  Copyright (c) 2008 Intel Corporation
 *   Author: Matthew Wilcox <willy@linux.intel.com>
L
Linus Torvalds 已提交
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/kmod.h>
#include <linux/delay.h>
38
#include <linux/dmi.h>
L
Linus Torvalds 已提交
39 40
#include <linux/workqueue.h>
#include <linux/nmi.h>
41
#include <linux/acpi.h>
L
Linus Torvalds 已提交
42
#include <linux/efi.h>
43 44
#include <linux/ioport.h>
#include <linux/list.h>
45 46 47 48 49 50 51 52 53
#include <linux/jiffies.h>
#include <linux/semaphore.h>

#include <asm/io.h>
#include <asm/uaccess.h>

#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/processor.h>
L
Linus Torvalds 已提交
54 55

#define _COMPONENT		ACPI_OS_SERVICES
56
ACPI_MODULE_NAME("osl");
L
Linus Torvalds 已提交
57
#define PREFIX		"ACPI: "
L
Len Brown 已提交
58 59 60
struct acpi_os_dpc {
	acpi_osd_exec_callback function;
	void *context;
61
	struct work_struct work;
L
Linus Torvalds 已提交
62 63 64 65 66 67 68 69 70 71 72 73 74 75
};

#ifdef CONFIG_ACPI_CUSTOM_DSDT
#include CONFIG_ACPI_CUSTOM_DSDT_FILE
#endif

#ifdef ENABLE_DEBUGGER
#include <linux/kdb.h>

/* stuff for debugger support */
int acpi_in_debugger;
EXPORT_SYMBOL(acpi_in_debugger);

extern char line_buf[80];
L
Len Brown 已提交
76
#endif				/*ENABLE_DEBUGGER */
L
Linus Torvalds 已提交
77 78 79 80 81

static unsigned int acpi_irq_irq;
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
static struct workqueue_struct *kacpid_wq;
82
static struct workqueue_struct *kacpi_notify_wq;
L
Linus Torvalds 已提交
83

84 85 86 87 88 89 90 91 92 93 94 95
struct acpi_res_list {
	resource_size_t start;
	resource_size_t end;
	acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
	char name[5];   /* only can have a length of 4 chars, make use of this
			   one instead of res->name, no need to kalloc then */
	struct list_head resource_list;
};

static LIST_HEAD(resource_list_head);
static DEFINE_SPINLOCK(acpi_res_lock);

L
Len Brown 已提交
96 97 98
#define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */
static char osi_additional_string[OSI_STRING_LENGTH_MAX];

99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
/*
 * "Ode to _OSI(Linux)"
 *
 * osi_linux -- Control response to BIOS _OSI(Linux) query.
 *
 * As Linux evolves, the features that it supports change.
 * So an OSI string such as "Linux" is not specific enough
 * to be useful across multiple versions of Linux.  It
 * doesn't identify any particular feature, interface,
 * or even any particular version of Linux...
 *
 * Unfortunately, Linux-2.6.22 and earlier responded "yes"
 * to a BIOS _OSI(Linux) query.  When
 * a reference mobile BIOS started using it, its use
 * started to spread to many vendor platforms.
 * As it is not supportable, we need to halt that spread.
 *
 * Today, most BIOS references to _OSI(Linux) are noise --
 * they have no functional effect and are just dead code
 * carried over from the reference BIOS.
 *
 * The next most common case is that _OSI(Linux) harms Linux,
 * usually by causing the BIOS to follow paths that are
 * not tested during Windows validation.
 *
 * Finally, there is a short list of platforms
 * where OSI(Linux) benefits Linux.
 *
 * In Linux-2.6.23, OSI(Linux) is first disabled by default.
 * DMI is used to disable the dmesg warning about OSI(Linux)
 * on platforms where it is known to have no effect.
 * But a dmesg warning remains for systems where
 * we do not know if OSI(Linux) is good or bad for the system.
 * DMI is also used to enable OSI(Linux) for the machines
 * that are known to need it.
 *
 * BIOS writers should NOT query _OSI(Linux) on future systems.
 * It will be ignored by default, and to get Linux to
 * not ignore it will require a kernel source update to
 * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
 */
#define OSI_LINUX_ENABLE 0

A
Adrian Bunk 已提交
142
static struct osi_linux {
143 144 145 146 147
	unsigned int	enable:1;
	unsigned int	dmi:1;
	unsigned int	cmdline:1;
	unsigned int	known:1;
} osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0};
148

149 150 151 152 153 154 155 156
static void __init acpi_request_region (struct acpi_generic_address *addr,
	unsigned int length, char *desc)
{
	struct resource *res;

	if (!addr->address || !length)
		return;

L
Len Brown 已提交
157
	if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
158
		res = request_region(addr->address, length, desc);
L
Len Brown 已提交
159
	else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
160 161 162 163 164
		res = request_mem_region(addr->address, length, desc);
}

static int __init acpi_reserve_resources(void)
{
L
Len Brown 已提交
165
	acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
166 167
		"ACPI PM1a_EVT_BLK");

L
Len Brown 已提交
168
	acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
169 170
		"ACPI PM1b_EVT_BLK");

L
Len Brown 已提交
171
	acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
172 173
		"ACPI PM1a_CNT_BLK");

L
Len Brown 已提交
174
	acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
175 176
		"ACPI PM1b_CNT_BLK");

L
Len Brown 已提交
177 178
	if (acpi_gbl_FADT.pm_timer_length == 4)
		acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
179

L
Len Brown 已提交
180
	acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
181 182 183 184
		"ACPI PM2_CNT_BLK");

	/* Length of GPE blocks must be a non-negative multiple of 2 */

L
Len Brown 已提交
185 186 187
	if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
		acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
			       acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
188

L
Len Brown 已提交
189 190 191
	if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
		acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
			       acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
192 193 194 195 196

	return 0;
}
device_initcall(acpi_reserve_resources);

197
acpi_status __init acpi_os_initialize(void)
L
Linus Torvalds 已提交
198 199 200 201
{
	return AE_OK;
}

L
Len Brown 已提交
202
acpi_status acpi_os_initialize1(void)
L
Linus Torvalds 已提交
203 204
{
	kacpid_wq = create_singlethread_workqueue("kacpid");
205
	kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
L
Linus Torvalds 已提交
206
	BUG_ON(!kacpid_wq);
207
	BUG_ON(!kacpi_notify_wq);
L
Linus Torvalds 已提交
208 209 210
	return AE_OK;
}

L
Len Brown 已提交
211
acpi_status acpi_os_terminate(void)
L
Linus Torvalds 已提交
212 213 214 215 216 217 218
{
	if (acpi_irq_handler) {
		acpi_os_remove_interrupt_handler(acpi_irq_irq,
						 acpi_irq_handler);
	}

	destroy_workqueue(kacpid_wq);
219
	destroy_workqueue(kacpi_notify_wq);
L
Linus Torvalds 已提交
220 221 222 223

	return AE_OK;
}

L
Len Brown 已提交
224
void acpi_os_printf(const char *fmt, ...)
L
Linus Torvalds 已提交
225 226 227 228 229 230
{
	va_list args;
	va_start(args, fmt);
	acpi_os_vprintf(fmt, args);
	va_end(args);
}
L
Len Brown 已提交
231 232

void acpi_os_vprintf(const char *fmt, va_list args)
L
Linus Torvalds 已提交
233 234
{
	static char buffer[512];
L
Len Brown 已提交
235

L
Linus Torvalds 已提交
236 237 238 239 240 241 242 243 244 245 246 247 248
	vsprintf(buffer, fmt, args);

#ifdef ENABLE_DEBUGGER
	if (acpi_in_debugger) {
		kdb_printf("%s", buffer);
	} else {
		printk("%s", buffer);
	}
#else
	printk("%s", buffer);
#endif
}

249
acpi_physical_address __init acpi_os_get_root_pointer(void)
L
Linus Torvalds 已提交
250 251
{
	if (efi_enabled) {
252
		if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
253
			return efi.acpi20;
254
		else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
255
			return efi.acpi;
L
Linus Torvalds 已提交
256
		else {
L
Len Brown 已提交
257 258
			printk(KERN_ERR PREFIX
			       "System description tables not found\n");
259
			return 0;
L
Linus Torvalds 已提交
260
		}
261 262 263 264 265 266
	} else {
		acpi_physical_address pa = 0;

		acpi_find_root_pointer(&pa);
		return pa;
	}
L
Linus Torvalds 已提交
267 268
}

269 270
void __iomem *__init_refok
acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
L
Linus Torvalds 已提交
271
{
272 273
	if (phys > ULONG_MAX) {
		printk(KERN_ERR PREFIX "Cannot map memory that high\n");
R
Randy Dunlap 已提交
274
		return NULL;
L
Linus Torvalds 已提交
275
	}
276 277 278 279 280 281 282
	if (acpi_gbl_permanent_mmap)
		/*
		* ioremap checks to ensure this is in reserved space
		*/
		return ioremap((unsigned long)phys, size);
	else
		return __acpi_map_table((unsigned long)phys, size);
L
Linus Torvalds 已提交
283
}
284
EXPORT_SYMBOL_GPL(acpi_os_map_memory);
L
Linus Torvalds 已提交
285

L
Len Brown 已提交
286
void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
L
Linus Torvalds 已提交
287
{
288 289 290
	if (acpi_gbl_permanent_mmap) {
		iounmap(virt);
	}
L
Linus Torvalds 已提交
291
}
292
EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
L
Linus Torvalds 已提交
293 294 295

#ifdef ACPI_FUTURE_USAGE
acpi_status
L
Len Brown 已提交
296
acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
L
Linus Torvalds 已提交
297
{
L
Len Brown 已提交
298
	if (!phys || !virt)
L
Linus Torvalds 已提交
299 300 301 302 303 304 305 306 307 308 309 310 311
		return AE_BAD_PARAMETER;

	*phys = virt_to_phys(virt);

	return AE_OK;
}
#endif

#define ACPI_MAX_OVERRIDE_LEN 100

static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];

acpi_status
L
Len Brown 已提交
312 313
acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
			    acpi_string * new_val)
L
Linus Torvalds 已提交
314 315 316 317 318
{
	if (!init_val || !new_val)
		return AE_BAD_PARAMETER;

	*new_val = NULL;
L
Len Brown 已提交
319
	if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
L
Linus Torvalds 已提交
320
		printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
L
Len Brown 已提交
321
		       acpi_os_name);
L
Linus Torvalds 已提交
322 323 324 325 326 327 328
		*new_val = acpi_os_name;
	}

	return AE_OK;
}

acpi_status
L
Len Brown 已提交
329 330
acpi_os_table_override(struct acpi_table_header * existing_table,
		       struct acpi_table_header ** new_table)
L
Linus Torvalds 已提交
331 332 333 334
{
	if (!existing_table || !new_table)
		return AE_BAD_PARAMETER;

335 336
	*new_table = NULL;

L
Linus Torvalds 已提交
337 338
#ifdef CONFIG_ACPI_CUSTOM_DSDT
	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
L
Len Brown 已提交
339
		*new_table = (struct acpi_table_header *)AmlCode;
L
Linus Torvalds 已提交
340
#endif
341 342 343 344 345 346 347
	if (*new_table != NULL) {
		printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
			   "this is unsafe: tainting kernel\n",
		       existing_table->signature,
		       existing_table->oem_table_id);
		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
	}
L
Linus Torvalds 已提交
348 349 350
	return AE_OK;
}

351
static irqreturn_t acpi_irq(int irq, void *dev_id)
L
Linus Torvalds 已提交
352
{
353 354 355 356 357 358 359 360 361
	u32 handled;

	handled = (*acpi_irq_handler) (acpi_irq_context);

	if (handled) {
		acpi_irq_handled++;
		return IRQ_HANDLED;
	} else
		return IRQ_NONE;
L
Linus Torvalds 已提交
362 363 364
}

acpi_status
L
Len Brown 已提交
365 366
acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
				  void *context)
L
Linus Torvalds 已提交
367 368 369
{
	unsigned int irq;

370 371
	acpi_irq_stats_init();

L
Linus Torvalds 已提交
372 373 374 375 376
	/*
	 * Ignore the GSI from the core, and use the value in our copy of the
	 * FADT. It may not be the same if an interrupt source override exists
	 * for the SCI.
	 */
377
	gsi = acpi_gbl_FADT.sci_interrupt;
L
Linus Torvalds 已提交
378 379 380 381 382 383 384 385
	if (acpi_gsi_to_irq(gsi, &irq) < 0) {
		printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
		       gsi);
		return AE_OK;
	}

	acpi_irq_handler = handler;
	acpi_irq_context = context;
386
	if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
L
Linus Torvalds 已提交
387 388 389 390 391 392 393 394
		printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
		return AE_NOT_ACQUIRED;
	}
	acpi_irq_irq = irq;

	return AE_OK;
}

L
Len Brown 已提交
395
acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
L
Linus Torvalds 已提交
396 397 398 399 400 401 402 403 404 405 406 407 408 409
{
	if (irq) {
		free_irq(irq, acpi_irq);
		acpi_irq_handler = NULL;
		acpi_irq_irq = 0;
	}

	return AE_OK;
}

/*
 * Running in interpreter thread context, safe to sleep
 */

L
Len Brown 已提交
410
void acpi_os_sleep(acpi_integer ms)
L
Linus Torvalds 已提交
411
{
412
	schedule_timeout_interruptible(msecs_to_jiffies(ms));
L
Linus Torvalds 已提交
413
}
L
Len Brown 已提交
414 415

void acpi_os_stall(u32 us)
L
Linus Torvalds 已提交
416 417 418 419 420 421 422 423 424 425 426
{
	while (us) {
		u32 delay = 1000;

		if (delay > us)
			delay = us;
		udelay(delay);
		touch_nmi_watchdog();
		us -= delay;
	}
}
L
Len Brown 已提交
427

L
Linus Torvalds 已提交
428 429 430 431 432
/*
 * Support ACPI 3.0 AML Timer operand
 * Returns 64-bit free-running, monotonically increasing timer
 * with 100ns granularity
 */
L
Len Brown 已提交
433
u64 acpi_os_get_timer(void)
L
Linus Torvalds 已提交
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449
{
	static u64 t;

#ifdef	CONFIG_HPET
	/* TBD: use HPET if available */
#endif

#ifdef	CONFIG_X86_PM_TIMER
	/* TBD: default to PM timer if HPET was not available */
#endif
	if (!t)
		printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");

	return ++t;
}

L
Len Brown 已提交
450
acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
L
Linus Torvalds 已提交
451 452 453 454 455 456
{
	u32 dummy;

	if (!value)
		value = &dummy;

457 458
	*value = 0;
	if (width <= 8) {
L
Len Brown 已提交
459
		*(u8 *) value = inb(port);
460
	} else if (width <= 16) {
L
Len Brown 已提交
461
		*(u16 *) value = inw(port);
462
	} else if (width <= 32) {
L
Len Brown 已提交
463
		*(u32 *) value = inl(port);
464
	} else {
L
Linus Torvalds 已提交
465 466 467 468 469
		BUG();
	}

	return AE_OK;
}
L
Len Brown 已提交
470

L
Linus Torvalds 已提交
471 472
EXPORT_SYMBOL(acpi_os_read_port);

L
Len Brown 已提交
473
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
L
Linus Torvalds 已提交
474
{
475
	if (width <= 8) {
L
Linus Torvalds 已提交
476
		outb(value, port);
477
	} else if (width <= 16) {
L
Linus Torvalds 已提交
478
		outw(value, port);
479
	} else if (width <= 32) {
L
Linus Torvalds 已提交
480
		outl(value, port);
481
	} else {
L
Linus Torvalds 已提交
482 483 484 485 486
		BUG();
	}

	return AE_OK;
}
L
Len Brown 已提交
487

L
Linus Torvalds 已提交
488 489 490
EXPORT_SYMBOL(acpi_os_write_port);

acpi_status
L
Len Brown 已提交
491
acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
L
Linus Torvalds 已提交
492
{
L
Len Brown 已提交
493 494
	u32 dummy;
	void __iomem *virt_addr;
L
Linus Torvalds 已提交
495

496
	virt_addr = ioremap(phys_addr, width);
L
Linus Torvalds 已提交
497 498 499 500 501
	if (!value)
		value = &dummy;

	switch (width) {
	case 8:
L
Len Brown 已提交
502
		*(u8 *) value = readb(virt_addr);
L
Linus Torvalds 已提交
503 504
		break;
	case 16:
L
Len Brown 已提交
505
		*(u16 *) value = readw(virt_addr);
L
Linus Torvalds 已提交
506 507
		break;
	case 32:
L
Len Brown 已提交
508
		*(u32 *) value = readl(virt_addr);
L
Linus Torvalds 已提交
509 510 511 512 513
		break;
	default:
		BUG();
	}

514
	iounmap(virt_addr);
L
Linus Torvalds 已提交
515 516 517 518 519

	return AE_OK;
}

acpi_status
L
Len Brown 已提交
520
acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
L
Linus Torvalds 已提交
521
{
L
Len Brown 已提交
522
	void __iomem *virt_addr;
L
Linus Torvalds 已提交
523

524
	virt_addr = ioremap(phys_addr, width);
L
Linus Torvalds 已提交
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539

	switch (width) {
	case 8:
		writeb(value, virt_addr);
		break;
	case 16:
		writew(value, virt_addr);
		break;
	case 32:
		writel(value, virt_addr);
		break;
	default:
		BUG();
	}

540
	iounmap(virt_addr);
L
Linus Torvalds 已提交
541 542 543 544 545

	return AE_OK;
}

acpi_status
L
Len Brown 已提交
546
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
547
			       u32 *value, u32 width)
L
Linus Torvalds 已提交
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567
{
	int result, size;

	if (!value)
		return AE_BAD_PARAMETER;

	switch (width) {
	case 8:
		size = 1;
		break;
	case 16:
		size = 2;
		break;
	case 32:
		size = 4;
		break;
	default:
		return AE_ERROR;
	}

568 569 570
	result = raw_pci_read(pci_id->segment, pci_id->bus,
				PCI_DEVFN(pci_id->device, pci_id->function),
				reg, size, value);
L
Linus Torvalds 已提交
571 572 573

	return (result ? AE_ERROR : AE_OK);
}
L
Len Brown 已提交
574

L
Linus Torvalds 已提交
575
acpi_status
L
Len Brown 已提交
576 577
acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
				acpi_integer value, u32 width)
L
Linus Torvalds 已提交
578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
{
	int result, size;

	switch (width) {
	case 8:
		size = 1;
		break;
	case 16:
		size = 2;
		break;
	case 32:
		size = 4;
		break;
	default:
		return AE_ERROR;
	}

595 596 597
	result = raw_pci_write(pci_id->segment, pci_id->bus,
				PCI_DEVFN(pci_id->device, pci_id->function),
				reg, size, value);
L
Linus Torvalds 已提交
598 599 600 601 602

	return (result ? AE_ERROR : AE_OK);
}

/* TODO: Change code to take advantage of driver model more */
L
Len Brown 已提交
603 604 605 606
static void acpi_os_derive_pci_id_2(acpi_handle rhandle,	/* upper bound  */
				    acpi_handle chandle,	/* current node */
				    struct acpi_pci_id **id,
				    int *is_bridge, u8 * bus_number)
L
Linus Torvalds 已提交
607
{
L
Len Brown 已提交
608 609 610 611 612
	acpi_handle handle;
	struct acpi_pci_id *pci_id = *id;
	acpi_status status;
	unsigned long temp;
	acpi_object_type type;
L
Linus Torvalds 已提交
613 614 615

	acpi_get_parent(chandle, &handle);
	if (handle != rhandle) {
L
Len Brown 已提交
616 617
		acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
					bus_number);
L
Linus Torvalds 已提交
618 619

		status = acpi_get_type(handle, &type);
L
Len Brown 已提交
620
		if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
L
Linus Torvalds 已提交
621 622
			return;

L
Len Brown 已提交
623 624 625
		status =
		    acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
					  &temp);
L
Linus Torvalds 已提交
626
		if (ACPI_SUCCESS(status)) {
627
			u32 val;
L
Len Brown 已提交
628 629
			pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
			pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
L
Linus Torvalds 已提交
630 631 632 633 634

			if (*is_bridge)
				pci_id->bus = *bus_number;

			/* any nicer way to get bus number of bridge ? */
L
Len Brown 已提交
635
			status =
636
			    acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
L
Len Brown 已提交
637 638
							   8);
			if (ACPI_SUCCESS(status)
639
			    && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
L
Len Brown 已提交
640 641
				status =
				    acpi_os_read_pci_configuration(pci_id, 0x18,
642
								   &val, 8);
L
Linus Torvalds 已提交
643 644 645 646 647
				if (!ACPI_SUCCESS(status)) {
					/* Certainly broken...  FIX ME */
					return;
				}
				*is_bridge = 1;
648
				pci_id->bus = val;
L
Len Brown 已提交
649 650
				status =
				    acpi_os_read_pci_configuration(pci_id, 0x19,
651
								   &val, 8);
L
Linus Torvalds 已提交
652
				if (ACPI_SUCCESS(status)) {
653
					*bus_number = val;
L
Linus Torvalds 已提交
654 655 656 657 658 659 660
				}
			} else
				*is_bridge = 0;
		}
	}
}

L
Len Brown 已提交
661 662 663
void acpi_os_derive_pci_id(acpi_handle rhandle,	/* upper bound  */
			   acpi_handle chandle,	/* current node */
			   struct acpi_pci_id **id)
L
Linus Torvalds 已提交
664 665 666 667 668 669 670
{
	int is_bridge = 1;
	u8 bus_number = (*id)->bus;

	acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
}

671
static void acpi_os_execute_deferred(struct work_struct *work)
672 673 674 675 676 677 678 679 680 681
{
	struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
	if (!dpc) {
		printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
		return;
	}

	dpc->function(dpc->context);
	kfree(dpc);

682
	return;
L
Linus Torvalds 已提交
683 684
}

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700
/*******************************************************************************
 *
 * FUNCTION:    acpi_os_execute
 *
 * PARAMETERS:  Type               - Type of the callback
 *              Function           - Function to be executed
 *              Context            - Function parameters
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Depending on type, either queues function for deferred execution or
 *              immediately executes function on a separate thread.
 *
 ******************************************************************************/

acpi_status acpi_os_execute(acpi_execute_type type,
L
Len Brown 已提交
701
			    acpi_osd_exec_callback function, void *context)
L
Linus Torvalds 已提交
702
{
L
Len Brown 已提交
703 704
	acpi_status status = AE_OK;
	struct acpi_os_dpc *dpc;
705
	struct workqueue_struct *queue;
706 707 708
	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
			  "Scheduling function [%p(%p)] for deferred execution.\n",
			  function, context));
L
Linus Torvalds 已提交
709 710

	if (!function)
711
		return AE_BAD_PARAMETER;
712

L
Linus Torvalds 已提交
713 714
	/*
	 * Allocate/initialize DPC structure.  Note that this memory will be
715
	 * freed by the callee.  The kernel handles the work_struct list  in a
L
Linus Torvalds 已提交
716 717 718
	 * way that allows us to also free its memory inside the callee.
	 * Because we may want to schedule several tasks with different
	 * parameters we can't use the approach some kernel code uses of
719
	 * having a static work_struct.
L
Linus Torvalds 已提交
720
	 */
721

722
	dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
L
Linus Torvalds 已提交
723
	if (!dpc)
724 725
		return_ACPI_STATUS(AE_NO_MEMORY);

L
Linus Torvalds 已提交
726 727
	dpc->function = function;
	dpc->context = context;
728

729 730 731 732 733 734 735
	INIT_WORK(&dpc->work, acpi_os_execute_deferred);
	queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
	if (!queue_work(queue, &dpc->work)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
			  "Call to queue_work() failed.\n"));
		status = AE_ERROR;
		kfree(dpc);
L
Linus Torvalds 已提交
736
	}
737
	return_ACPI_STATUS(status);
L
Linus Torvalds 已提交
738
}
L
Len Brown 已提交
739

740
EXPORT_SYMBOL(acpi_os_execute);
L
Linus Torvalds 已提交
741

L
Len Brown 已提交
742
void acpi_os_wait_events_complete(void *context)
L
Linus Torvalds 已提交
743 744
{
	flush_workqueue(kacpid_wq);
745
	flush_workqueue(kacpi_notify_wq);
L
Linus Torvalds 已提交
746
}
L
Len Brown 已提交
747

L
Linus Torvalds 已提交
748 749 750 751 752
EXPORT_SYMBOL(acpi_os_wait_events_complete);

/*
 * Allocate the memory for a spinlock and initialize it.
 */
B
Bob Moore 已提交
753
acpi_status acpi_os_create_lock(acpi_spinlock * handle)
L
Linus Torvalds 已提交
754
{
B
Bob Moore 已提交
755
	spin_lock_init(*handle);
L
Linus Torvalds 已提交
756

757
	return AE_OK;
L
Linus Torvalds 已提交
758 759 760 761 762
}

/*
 * Deallocate the memory for a spinlock.
 */
B
Bob Moore 已提交
763
void acpi_os_delete_lock(acpi_spinlock handle)
L
Linus Torvalds 已提交
764
{
765
	return;
L
Linus Torvalds 已提交
766 767 768
}

acpi_status
L
Len Brown 已提交
769
acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
L
Linus Torvalds 已提交
770
{
L
Len Brown 已提交
771
	struct semaphore *sem = NULL;
L
Linus Torvalds 已提交
772 773 774

	sem = acpi_os_allocate(sizeof(struct semaphore));
	if (!sem)
775
		return AE_NO_MEMORY;
L
Linus Torvalds 已提交
776 777 778 779
	memset(sem, 0, sizeof(struct semaphore));

	sema_init(sem, initial_units);

L
Len Brown 已提交
780
	*handle = (acpi_handle *) sem;
L
Linus Torvalds 已提交
781

L
Len Brown 已提交
782 783
	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
			  *handle, initial_units));
L
Linus Torvalds 已提交
784

785
	return AE_OK;
L
Linus Torvalds 已提交
786 787 788 789 790 791 792 793 794
}

/*
 * TODO: A better way to delete semaphores?  Linux doesn't have a
 * 'delete_semaphore()' function -- may result in an invalid
 * pointer dereference for non-synchronized consumers.	Should
 * we at least check for blocked threads and signal/cancel them?
 */

L
Len Brown 已提交
795
acpi_status acpi_os_delete_semaphore(acpi_handle handle)
L
Linus Torvalds 已提交
796
{
L
Len Brown 已提交
797
	struct semaphore *sem = (struct semaphore *)handle;
L
Linus Torvalds 已提交
798 799

	if (!sem)
800
		return AE_BAD_PARAMETER;
L
Linus Torvalds 已提交
801

L
Len Brown 已提交
802
	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
L
Linus Torvalds 已提交
803

804
	BUG_ON(!list_empty(&sem->wait_list));
805
	kfree(sem);
L
Len Brown 已提交
806
	sem = NULL;
L
Linus Torvalds 已提交
807

808
	return AE_OK;
L
Linus Torvalds 已提交
809 810 811 812 813
}

/*
 * TODO: Support for units > 1?
 */
L
Len Brown 已提交
814
acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
L
Linus Torvalds 已提交
815
{
L
Len Brown 已提交
816 817
	acpi_status status = AE_OK;
	struct semaphore *sem = (struct semaphore *)handle;
818
	long jiffies;
L
Len Brown 已提交
819
	int ret = 0;
L
Linus Torvalds 已提交
820 821

	if (!sem || (units < 1))
822
		return AE_BAD_PARAMETER;
L
Linus Torvalds 已提交
823 824

	if (units > 1)
825
		return AE_SUPPORT;
L
Linus Torvalds 已提交
826

L
Len Brown 已提交
827 828
	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
			  handle, units, timeout));
L
Linus Torvalds 已提交
829

830 831 832 833 834 835 836 837
	if (timeout == ACPI_WAIT_FOREVER)
		jiffies = MAX_SCHEDULE_TIMEOUT;
	else
		jiffies = msecs_to_jiffies(timeout);
	
	ret = down_timeout(sem, jiffies);
	if (ret)
		status = AE_TIME;
L
Linus Torvalds 已提交
838 839

	if (ACPI_FAILURE(status)) {
840
		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
841
				  "Failed to acquire semaphore[%p|%d|%d], %s",
L
Len Brown 已提交
842 843 844 845
				  handle, units, timeout,
				  acpi_format_exception(status)));
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
846
				  "Acquired semaphore[%p|%d|%d]", handle,
L
Len Brown 已提交
847
				  units, timeout));
L
Linus Torvalds 已提交
848 849
	}

850
	return status;
L
Linus Torvalds 已提交
851 852 853 854 855
}

/*
 * TODO: Support for units > 1?
 */
L
Len Brown 已提交
856
acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
L
Linus Torvalds 已提交
857
{
L
Len Brown 已提交
858
	struct semaphore *sem = (struct semaphore *)handle;
L
Linus Torvalds 已提交
859 860

	if (!sem || (units < 1))
861
		return AE_BAD_PARAMETER;
L
Linus Torvalds 已提交
862 863

	if (units > 1)
864
		return AE_SUPPORT;
L
Linus Torvalds 已提交
865

L
Len Brown 已提交
866 867
	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
			  units));
L
Linus Torvalds 已提交
868 869 870

	up(sem);

871
	return AE_OK;
L
Linus Torvalds 已提交
872
}
L
Len Brown 已提交
873

L
Linus Torvalds 已提交
874
#ifdef ACPI_FUTURE_USAGE
L
Len Brown 已提交
875
u32 acpi_os_get_line(char *buffer)
L
Linus Torvalds 已提交
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
{

#ifdef ENABLE_DEBUGGER
	if (acpi_in_debugger) {
		u32 chars;

		kdb_read(buffer, sizeof(line_buf));

		/* remove the CR kdb includes */
		chars = strlen(buffer) - 1;
		buffer[chars] = '\0';
	}
#endif

	return 0;
}
L
Len Brown 已提交
892
#endif				/*  ACPI_FUTURE_USAGE  */
L
Linus Torvalds 已提交
893

L
Len Brown 已提交
894
acpi_status acpi_os_signal(u32 function, void *info)
L
Linus Torvalds 已提交
895
{
L
Len Brown 已提交
896
	switch (function) {
L
Linus Torvalds 已提交
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
	case ACPI_SIGNAL_FATAL:
		printk(KERN_ERR PREFIX "Fatal opcode executed\n");
		break;
	case ACPI_SIGNAL_BREAKPOINT:
		/*
		 * AML Breakpoint
		 * ACPI spec. says to treat it as a NOP unless
		 * you are debugging.  So if/when we integrate
		 * AML debugger into the kernel debugger its
		 * hook will go here.  But until then it is
		 * not useful to print anything on breakpoints.
		 */
		break;
	default:
		break;
	}

	return AE_OK;
}
L
Len Brown 已提交
916 917

static int __init acpi_os_name_setup(char *str)
L
Linus Torvalds 已提交
918 919
{
	char *p = acpi_os_name;
L
Len Brown 已提交
920
	int count = ACPI_MAX_OVERRIDE_LEN - 1;
L
Linus Torvalds 已提交
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935

	if (!str || !*str)
		return 0;

	for (; count-- && str && *str; str++) {
		if (isalnum(*str) || *str == ' ' || *str == ':')
			*p++ = *str;
		else if (*str == '\'' || *str == '"')
			continue;
		else
			break;
	}
	*p = 0;

	return 1;
L
Len Brown 已提交
936

L
Linus Torvalds 已提交
937 938 939 940
}

__setup("acpi_os_name=", acpi_os_name_setup);

941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
static void __init set_osi_linux(unsigned int enable)
{
	if (osi_linux.enable != enable) {
		osi_linux.enable = enable;
		printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
			enable ? "Add": "Delet");
	}
	return;
}

static void __init acpi_cmdline_osi_linux(unsigned int enable)
{
	osi_linux.cmdline = 1;	/* cmdline set the default */
	set_osi_linux(enable);

	return;
}

void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
{
	osi_linux.dmi = 1;	/* DMI knows that this box asks OSI(Linux) */

	printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);

	if (enable == -1)
		return;

	osi_linux.known = 1;	/* DMI knows which OSI(Linux) default needed */
969

970
	set_osi_linux(enable);
971 972 973 974

	return;
}

L
Linus Torvalds 已提交
975
/*
L
Len Brown 已提交
976 977
 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
 *
L
Linus Torvalds 已提交
978
 * empty string disables _OSI
L
Len Brown 已提交
979 980
 * string starting with '!' disables that string
 * otherwise string is added to list, augmenting built-in strings
L
Linus Torvalds 已提交
981
 */
982
int __init acpi_osi_setup(char *str)
L
Linus Torvalds 已提交
983 984 985 986
{
	if (str == NULL || *str == '\0') {
		printk(KERN_INFO PREFIX "_OSI method disabled\n");
		acpi_gbl_create_osi_method = FALSE;
L
Len Brown 已提交
987
	} else if (!strcmp("!Linux", str)) {
988
		acpi_cmdline_osi_linux(0);	/* !enable */
L
Len Brown 已提交
989 990 991
	} else if (*str == '!') {
		if (acpi_osi_invalidate(++str) == AE_OK)
			printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
992
	} else if (!strcmp("Linux", str)) {
993
		acpi_cmdline_osi_linux(1);	/* enable */
L
Len Brown 已提交
994 995 996
	} else if (*osi_additional_string == '\0') {
		strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
		printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
L
Linus Torvalds 已提交
997 998 999 1000 1001 1002 1003 1004
	}

	return 1;
}

__setup("acpi_osi=", acpi_osi_setup);

/* enable serialization to combat AE_ALREADY_EXISTS errors */
L
Len Brown 已提交
1005
static int __init acpi_serialize_setup(char *str)
L
Linus Torvalds 已提交
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
{
	printk(KERN_INFO PREFIX "serialize enabled\n");

	acpi_gbl_all_methods_serialized = TRUE;

	return 1;
}

__setup("acpi_serialize", acpi_serialize_setup);

/*
 * Wake and Run-Time GPES are expected to be separate.
 * We disable wake-GPEs at run-time to prevent spurious
 * interrupts.
 *
 * However, if a system exists that shares Wake and
 * Run-time events on the same GPE this flag is available
 * to tell Linux to keep the wake-time GPEs enabled at run-time.
 */
L
Len Brown 已提交
1025
static int __init acpi_wake_gpes_always_on_setup(char *str)
L
Linus Torvalds 已提交
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
{
	printk(KERN_INFO PREFIX "wake GPEs not disabled\n");

	acpi_gbl_leave_wake_gpes_disabled = FALSE;

	return 1;
}

__setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);

1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
/* Check of resource interference between native drivers and ACPI
 * OperationRegions (SystemIO and System Memory only).
 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
 * in arbitrary AML code and can interfere with legacy drivers.
 * acpi_enforce_resources= can be set to:
 *
 *   - strict           (2)
 *     -> further driver trying to access the resources will not load
 *   - lax (default)    (1)
 *     -> further driver trying to access the resources will load, but you
 *     get a system message that something might go wrong...
 *
 *   - no               (0)
 *     -> ACPI Operation Region resources will not be registered
 *
 */
#define ENFORCE_RESOURCES_STRICT 2
#define ENFORCE_RESOURCES_LAX    1
#define ENFORCE_RESOURCES_NO     0

static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_LAX;

static int __init acpi_enforce_resources_setup(char *str)
{
	if (str == NULL || *str == '\0')
		return 0;

	if (!strcmp("strict", str))
		acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
	else if (!strcmp("lax", str))
		acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
	else if (!strcmp("no", str))
		acpi_enforce_resources = ENFORCE_RESOURCES_NO;

	return 1;
}

__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);

/* Check for resource conflicts between ACPI OperationRegions and native
 * drivers */
1077
int acpi_check_resource_conflict(struct resource *res)
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
{
	struct acpi_res_list *res_list_elem;
	int ioport;
	int clash = 0;

	if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
		return 0;
	if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
		return 0;

	ioport = res->flags & IORESOURCE_IO;

	spin_lock(&acpi_res_lock);
	list_for_each_entry(res_list_elem, &resource_list_head,
			    resource_list) {
		if (ioport && (res_list_elem->resource_type
			       != ACPI_ADR_SPACE_SYSTEM_IO))
			continue;
		if (!ioport && (res_list_elem->resource_type
				!= ACPI_ADR_SPACE_SYSTEM_MEMORY))
			continue;

		if (res->end < res_list_elem->start
		    || res_list_elem->end < res->start)
			continue;
		clash = 1;
		break;
	}
	spin_unlock(&acpi_res_lock);

	if (clash) {
		if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
J
Jean Delvare 已提交
1110
			printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
			       " conflicts with ACPI region %s"
			       " [0x%llx-0x%llx]\n",
			       acpi_enforce_resources == ENFORCE_RESOURCES_LAX
			       ? KERN_WARNING : KERN_ERR,
			       ioport ? "I/O" : "Memory", res->name,
			       (long long) res->start, (long long) res->end,
			       res_list_elem->name,
			       (long long) res_list_elem->start,
			       (long long) res_list_elem->end);
			printk(KERN_INFO "ACPI: Device needs an ACPI driver\n");
		}
		if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
			return -EBUSY;
	}
	return 0;
}
1127
EXPORT_SYMBOL(acpi_check_resource_conflict);
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157

int acpi_check_region(resource_size_t start, resource_size_t n,
		      const char *name)
{
	struct resource res = {
		.start = start,
		.end   = start + n - 1,
		.name  = name,
		.flags = IORESOURCE_IO,
	};

	return acpi_check_resource_conflict(&res);
}
EXPORT_SYMBOL(acpi_check_region);

int acpi_check_mem_region(resource_size_t start, resource_size_t n,
		      const char *name)
{
	struct resource res = {
		.start = start,
		.end   = start + n - 1,
		.name  = name,
		.flags = IORESOURCE_MEM,
	};

	return acpi_check_resource_conflict(&res);

}
EXPORT_SYMBOL(acpi_check_mem_region);

1158 1159 1160 1161 1162 1163
/*
 * Acquire a spinlock.
 *
 * handle is a pointer to the spinlock_t.
 */

B
Bob Moore 已提交
1164
acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1165
{
B
Bob Moore 已提交
1166
	acpi_cpu_flags flags;
B
Bob Moore 已提交
1167
	spin_lock_irqsave(lockp, flags);
1168 1169 1170 1171 1172 1173 1174
	return flags;
}

/*
 * Release a spinlock. See above.
 */

B
Bob Moore 已提交
1175
void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1176
{
B
Bob Moore 已提交
1177
	spin_unlock_irqrestore(lockp, flags);
1178 1179 1180 1181 1182 1183 1184 1185
}

#ifndef ACPI_USE_LOCAL_CACHE

/*******************************************************************************
 *
 * FUNCTION:    acpi_os_create_cache
 *
B
Bob Moore 已提交
1186 1187 1188 1189
 * PARAMETERS:  name      - Ascii name for the cache
 *              size      - Size of each cached object
 *              depth     - Maximum depth of the cache (in objects) <ignored>
 *              cache     - Where the new cache object is returned
1190
 *
B
Bob Moore 已提交
1191
 * RETURN:      status
1192 1193 1194 1195 1196 1197
 *
 * DESCRIPTION: Create a cache object
 *
 ******************************************************************************/

acpi_status
L
Len Brown 已提交
1198
acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1199
{
1200
	*cache = kmem_cache_create(name, size, 0, 0, NULL);
1201
	if (*cache == NULL)
B
Bob Moore 已提交
1202 1203 1204
		return AE_ERROR;
	else
		return AE_OK;
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_os_purge_cache
 *
 * PARAMETERS:  Cache           - Handle to cache object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Free all objects within the requested cache.
 *
 ******************************************************************************/

L
Len Brown 已提交
1219
acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1220
{
1221
	kmem_cache_shrink(cache);
L
Len Brown 已提交
1222
	return (AE_OK);
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_os_delete_cache
 *
 * PARAMETERS:  Cache           - Handle to cache object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Free all objects within the requested cache and delete the
 *              cache object.
 *
 ******************************************************************************/

L
Len Brown 已提交
1238
acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1239
{
1240
	kmem_cache_destroy(cache);
L
Len Brown 已提交
1241
	return (AE_OK);
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_os_release_object
 *
 * PARAMETERS:  Cache       - Handle to cache object
 *              Object      - The object to be released
 *
 * RETURN:      None
 *
 * DESCRIPTION: Release an object to the specified cache.  If cache is full,
 *              the object is deleted.
 *
 ******************************************************************************/

L
Len Brown 已提交
1258
acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1259
{
L
Len Brown 已提交
1260 1261
	kmem_cache_free(cache, object);
	return (AE_OK);
1262 1263
}

L
Len Brown 已提交
1264 1265 1266 1267 1268
/**
 *	acpi_dmi_dump - dump DMI slots needed for blacklist entry
 *
 *	Returns 0 on success
 */
A
Adrian Bunk 已提交
1269
static int acpi_dmi_dump(void)
L
Len Brown 已提交
1270 1271 1272 1273 1274 1275
{

	if (!dmi_available)
		return -1;

	printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
L
Len Brown 已提交
1276
		dmi_get_system_info(DMI_SYS_VENDOR));
L
Len Brown 已提交
1277
	printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
L
Len Brown 已提交
1278
		dmi_get_system_info(DMI_PRODUCT_NAME));
L
Len Brown 已提交
1279
	printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
L
Len Brown 已提交
1280
		dmi_get_system_info(DMI_PRODUCT_VERSION));
L
Len Brown 已提交
1281
	printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
L
Len Brown 已提交
1282
		dmi_get_system_info(DMI_BOARD_NAME));
L
Len Brown 已提交
1283
	printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
L
Len Brown 已提交
1284
		dmi_get_system_info(DMI_BIOS_VENDOR));
L
Len Brown 已提交
1285
	printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
L
Len Brown 已提交
1286
		dmi_get_system_info(DMI_BIOS_DATE));
L
Len Brown 已提交
1287 1288 1289 1290 1291

	return 0;
}


B
Bob Moore 已提交
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
/******************************************************************************
 *
 * FUNCTION:    acpi_os_validate_interface
 *
 * PARAMETERS:  interface           - Requested interface to be validated
 *
 * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
 *
 * DESCRIPTION: Match an interface string to the interfaces supported by the
 *              host. Strings originate from an AML call to the _OSI method.
 *
 *****************************************************************************/

acpi_status
acpi_os_validate_interface (char *interface)
{
L
Len Brown 已提交
1308 1309
	if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
		return AE_OK;
1310
	if (!strcmp("Linux", interface)) {
1311

1312
		printk(KERN_NOTICE PREFIX
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
			"BIOS _OSI(Linux) query %s%s\n",
			osi_linux.enable ? "honored" : "ignored",
			osi_linux.cmdline ? " via cmdline" :
			osi_linux.dmi ? " via DMI" : "");

		if (!osi_linux.dmi) {
			if (acpi_dmi_dump())
				printk(KERN_NOTICE PREFIX
					"[please extract dmidecode output]\n");
			printk(KERN_NOTICE PREFIX
				"Please send DMI info above to "
				"linux-acpi@vger.kernel.org\n");
		}
		if (!osi_linux.known && !osi_linux.cmdline) {
			printk(KERN_NOTICE PREFIX
				"If \"acpi_osi=%sLinux\" works better, "
				"please notify linux-acpi@vger.kernel.org\n",
				osi_linux.enable ? "!" : "");
		}

		if (osi_linux.enable)
1334 1335
			return AE_OK;
	}
L
Len Brown 已提交
1336
	return AE_SUPPORT;
B
Bob Moore 已提交
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358
}

/******************************************************************************
 *
 * FUNCTION:    acpi_os_validate_address
 *
 * PARAMETERS:  space_id             - ACPI space ID
 *              address             - Physical address
 *              length              - Address length
 *
 * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
 *              should return AE_AML_ILLEGAL_ADDRESS.
 *
 * DESCRIPTION: Validate a system address via the host OS. Used to validate
 *              the addresses accessed by AML operation regions.
 *
 *****************************************************************************/

acpi_status
acpi_os_validate_address (
    u8                   space_id,
    acpi_physical_address   address,
1359 1360
    acpi_size               length,
    char *name)
B
Bob Moore 已提交
1361
{
1362 1363 1364
	struct acpi_res_list *res;
	if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
		return AE_OK;
B
Bob Moore 已提交
1365

1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398
	switch (space_id) {
	case ACPI_ADR_SPACE_SYSTEM_IO:
	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
		/* Only interference checks against SystemIO and SytemMemory
		   are needed */
		res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
		if (!res)
			return AE_OK;
		/* ACPI names are fixed to 4 bytes, still better use strlcpy */
		strlcpy(res->name, name, 5);
		res->start = address;
		res->end = address + length - 1;
		res->resource_type = space_id;
		spin_lock(&acpi_res_lock);
		list_add(&res->resource_list, &resource_list_head);
		spin_unlock(&acpi_res_lock);
		pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
			 "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
			 ? "SystemIO" : "System Memory",
			 (unsigned long long)res->start,
			 (unsigned long long)res->end,
			 res->name);
		break;
	case ACPI_ADR_SPACE_PCI_CONFIG:
	case ACPI_ADR_SPACE_EC:
	case ACPI_ADR_SPACE_SMBUS:
	case ACPI_ADR_SPACE_CMOS:
	case ACPI_ADR_SPACE_PCI_BAR_TARGET:
	case ACPI_ADR_SPACE_DATA_TABLE:
	case ACPI_ADR_SPACE_FIXED_HARDWARE:
		break;
	}
	return AE_OK;
B
Bob Moore 已提交
1399 1400
}

1401
#endif