| 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 | * Copyright (c) 2008 Intel Corporation |
| 8 | * Author: Matthew Wilcox <willy@linux.intel.com> |
| 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/mm.h> |
| 34 | #include <linux/pci.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 <linux/acpi.h> |
| 41 | #include <linux/efi.h> |
| 42 | #include <linux/ioport.h> |
| 43 | #include <linux/list.h> |
| 44 | #include <linux/jiffies.h> |
| 45 | #include <linux/semaphore.h> |
| 46 | |
| 47 | #include <asm/io.h> |
| 48 | #include <asm/uaccess.h> |
| 49 | |
| 50 | #include <acpi/acpi.h> |
| 51 | #include <acpi/acpi_bus.h> |
| 52 | #include <acpi/processor.h> |
| 53 | |
| 54 | #define _COMPONENT ACPI_OS_SERVICES |
| 55 | ACPI_MODULE_NAME("osl"); |
| 56 | #define PREFIX "ACPI: " |
| 57 | struct acpi_os_dpc { |
| 58 | acpi_osd_exec_callback function; |
| 59 | void *context; |
| 60 | struct work_struct work; |
| 61 | }; |
| 62 | |
| 63 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| 64 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE |
| 65 | #endif |
| 66 | |
| 67 | #ifdef ENABLE_DEBUGGER |
| 68 | #include <linux/kdb.h> |
| 69 | |
| 70 | /* stuff for debugger support */ |
| 71 | int acpi_in_debugger; |
| 72 | EXPORT_SYMBOL(acpi_in_debugger); |
| 73 | |
| 74 | extern char line_buf[80]; |
| 75 | #endif /*ENABLE_DEBUGGER */ |
| 76 | |
| 77 | static unsigned int acpi_irq_irq; |
| 78 | static acpi_osd_handler acpi_irq_handler; |
| 79 | static void *acpi_irq_context; |
| 80 | static struct workqueue_struct *kacpid_wq; |
| 81 | static struct workqueue_struct *kacpi_notify_wq; |
| 82 | static struct workqueue_struct *kacpi_hotplug_wq; |
| 83 | |
| 84 | struct acpi_res_list { |
| 85 | resource_size_t start; |
| 86 | resource_size_t end; |
| 87 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ |
| 88 | char name[5]; /* only can have a length of 4 chars, make use of this |
| 89 | one instead of res->name, no need to kalloc then */ |
| 90 | struct list_head resource_list; |
| 91 | }; |
| 92 | |
| 93 | static LIST_HEAD(resource_list_head); |
| 94 | static DEFINE_SPINLOCK(acpi_res_lock); |
| 95 | |
| 96 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
| 97 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; |
| 98 | |
| 99 | /* |
| 100 | * The story of _OSI(Linux) |
| 101 | * |
| 102 | * From pre-history through Linux-2.6.22, |
| 103 | * Linux responded TRUE upon a BIOS OSI(Linux) query. |
| 104 | * |
| 105 | * Unfortunately, reference BIOS writers got wind of this |
| 106 | * and put OSI(Linux) in their example code, quickly exposing |
| 107 | * this string as ill-conceived and opening the door to |
| 108 | * an un-bounded number of BIOS incompatibilities. |
| 109 | * |
| 110 | * For example, OSI(Linux) was used on resume to re-POST a |
| 111 | * video card on one system, because Linux at that time |
| 112 | * could not do a speedy restore in its native driver. |
| 113 | * But then upon gaining quick native restore capability, |
| 114 | * Linux has no way to tell the BIOS to skip the time-consuming |
| 115 | * POST -- putting Linux at a permanent performance disadvantage. |
| 116 | * On another system, the BIOS writer used OSI(Linux) |
| 117 | * to infer native OS support for IPMI! On other systems, |
| 118 | * OSI(Linux) simply got in the way of Linux claiming to |
| 119 | * be compatible with other operating systems, exposing |
| 120 | * BIOS issues such as skipped device initialization. |
| 121 | * |
| 122 | * So "Linux" turned out to be a really poor chose of |
| 123 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. |
| 124 | * |
| 125 | * BIOS writers should NOT query _OSI(Linux) on future systems. |
| 126 | * Linux will complain on the console when it sees it, and return FALSE. |
| 127 | * To get Linux to return TRUE for your system will require |
| 128 | * a kernel source update to add a DMI entry, |
| 129 | * or boot with "acpi_osi=Linux" |
| 130 | */ |
| 131 | |
| 132 | static struct osi_linux { |
| 133 | unsigned int enable:1; |
| 134 | unsigned int dmi:1; |
| 135 | unsigned int cmdline:1; |
| 136 | unsigned int known:1; |
| 137 | } osi_linux = { 0, 0, 0, 0}; |
| 138 | |
| 139 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
| 140 | unsigned int length, char *desc) |
| 141 | { |
| 142 | struct resource *res; |
| 143 | |
| 144 | if (!addr->address || !length) |
| 145 | return; |
| 146 | |
| 147 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
| 148 | res = request_region(addr->address, length, desc); |
| 149 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 150 | res = request_mem_region(addr->address, length, desc); |
| 151 | } |
| 152 | |
| 153 | static int __init acpi_reserve_resources(void) |
| 154 | { |
| 155 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
| 156 | "ACPI PM1a_EVT_BLK"); |
| 157 | |
| 158 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
| 159 | "ACPI PM1b_EVT_BLK"); |
| 160 | |
| 161 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
| 162 | "ACPI PM1a_CNT_BLK"); |
| 163 | |
| 164 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
| 165 | "ACPI PM1b_CNT_BLK"); |
| 166 | |
| 167 | if (acpi_gbl_FADT.pm_timer_length == 4) |
| 168 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); |
| 169 | |
| 170 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
| 171 | "ACPI PM2_CNT_BLK"); |
| 172 | |
| 173 | /* Length of GPE blocks must be a non-negative multiple of 2 */ |
| 174 | |
| 175 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
| 176 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, |
| 177 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); |
| 178 | |
| 179 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
| 180 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, |
| 181 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | device_initcall(acpi_reserve_resources); |
| 186 | |
| 187 | acpi_status __init acpi_os_initialize(void) |
| 188 | { |
| 189 | return AE_OK; |
| 190 | } |
| 191 | |
| 192 | acpi_status acpi_os_initialize1(void) |
| 193 | { |
| 194 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
| 195 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
| 196 | kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); |
| 197 | BUG_ON(!kacpid_wq); |
| 198 | BUG_ON(!kacpi_notify_wq); |
| 199 | BUG_ON(!kacpi_hotplug_wq); |
| 200 | return AE_OK; |
| 201 | } |
| 202 | |
| 203 | acpi_status acpi_os_terminate(void) |
| 204 | { |
| 205 | if (acpi_irq_handler) { |
| 206 | acpi_os_remove_interrupt_handler(acpi_irq_irq, |
| 207 | acpi_irq_handler); |
| 208 | } |
| 209 | |
| 210 | destroy_workqueue(kacpid_wq); |
| 211 | destroy_workqueue(kacpi_notify_wq); |
| 212 | destroy_workqueue(kacpi_hotplug_wq); |
| 213 | |
| 214 | return AE_OK; |
| 215 | } |
| 216 | |
| 217 | void acpi_os_printf(const char *fmt, ...) |
| 218 | { |
| 219 | va_list args; |
| 220 | va_start(args, fmt); |
| 221 | acpi_os_vprintf(fmt, args); |
| 222 | va_end(args); |
| 223 | } |
| 224 | |
| 225 | void acpi_os_vprintf(const char *fmt, va_list args) |
| 226 | { |
| 227 | static char buffer[512]; |
| 228 | |
| 229 | vsprintf(buffer, fmt, args); |
| 230 | |
| 231 | #ifdef ENABLE_DEBUGGER |
| 232 | if (acpi_in_debugger) { |
| 233 | kdb_printf("%s", buffer); |
| 234 | } else { |
| 235 | printk(KERN_CONT "%s", buffer); |
| 236 | } |
| 237 | #else |
| 238 | printk(KERN_CONT "%s", buffer); |
| 239 | #endif |
| 240 | } |
| 241 | |
| 242 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
| 243 | { |
| 244 | if (efi_enabled) { |
| 245 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
| 246 | return efi.acpi20; |
| 247 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
| 248 | return efi.acpi; |
| 249 | else { |
| 250 | printk(KERN_ERR PREFIX |
| 251 | "System description tables not found\n"); |
| 252 | return 0; |
| 253 | } |
| 254 | } else { |
| 255 | acpi_physical_address pa = 0; |
| 256 | |
| 257 | acpi_find_root_pointer(&pa); |
| 258 | return pa; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | void __iomem *__init_refok |
| 263 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
| 264 | { |
| 265 | if (phys > ULONG_MAX) { |
| 266 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); |
| 267 | return NULL; |
| 268 | } |
| 269 | if (acpi_gbl_permanent_mmap) |
| 270 | /* |
| 271 | * ioremap checks to ensure this is in reserved space |
| 272 | */ |
| 273 | return ioremap((unsigned long)phys, size); |
| 274 | else |
| 275 | return __acpi_map_table((unsigned long)phys, size); |
| 276 | } |
| 277 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
| 278 | |
| 279 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| 280 | { |
| 281 | if (acpi_gbl_permanent_mmap) |
| 282 | iounmap(virt); |
| 283 | else |
| 284 | __acpi_unmap_table(virt, size); |
| 285 | } |
| 286 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
| 287 | |
| 288 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| 289 | { |
| 290 | if (!acpi_gbl_permanent_mmap) |
| 291 | __acpi_unmap_table(virt, size); |
| 292 | } |
| 293 | |
| 294 | #ifdef ACPI_FUTURE_USAGE |
| 295 | acpi_status |
| 296 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
| 297 | { |
| 298 | if (!phys || !virt) |
| 299 | return AE_BAD_PARAMETER; |
| 300 | |
| 301 | *phys = virt_to_phys(virt); |
| 302 | |
| 303 | return AE_OK; |
| 304 | } |
| 305 | #endif |
| 306 | |
| 307 | #define ACPI_MAX_OVERRIDE_LEN 100 |
| 308 | |
| 309 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; |
| 310 | |
| 311 | acpi_status |
| 312 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
| 313 | acpi_string * new_val) |
| 314 | { |
| 315 | if (!init_val || !new_val) |
| 316 | return AE_BAD_PARAMETER; |
| 317 | |
| 318 | *new_val = NULL; |
| 319 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
| 320 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
| 321 | acpi_os_name); |
| 322 | *new_val = acpi_os_name; |
| 323 | } |
| 324 | |
| 325 | return AE_OK; |
| 326 | } |
| 327 | |
| 328 | acpi_status |
| 329 | acpi_os_table_override(struct acpi_table_header * existing_table, |
| 330 | struct acpi_table_header ** new_table) |
| 331 | { |
| 332 | if (!existing_table || !new_table) |
| 333 | return AE_BAD_PARAMETER; |
| 334 | |
| 335 | *new_table = NULL; |
| 336 | |
| 337 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| 338 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) |
| 339 | *new_table = (struct acpi_table_header *)AmlCode; |
| 340 | #endif |
| 341 | if (*new_table != NULL) { |
| 342 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " |
| 343 | "this is unsafe: tainting kernel\n", |
| 344 | existing_table->signature, |
| 345 | existing_table->oem_table_id); |
| 346 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); |
| 347 | } |
| 348 | return AE_OK; |
| 349 | } |
| 350 | |
| 351 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
| 352 | { |
| 353 | u32 handled; |
| 354 | |
| 355 | handled = (*acpi_irq_handler) (acpi_irq_context); |
| 356 | |
| 357 | if (handled) { |
| 358 | acpi_irq_handled++; |
| 359 | return IRQ_HANDLED; |
| 360 | } else { |
| 361 | acpi_irq_not_handled++; |
| 362 | return IRQ_NONE; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | acpi_status |
| 367 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
| 368 | void *context) |
| 369 | { |
| 370 | unsigned int irq; |
| 371 | |
| 372 | acpi_irq_stats_init(); |
| 373 | |
| 374 | /* |
| 375 | * Ignore the GSI from the core, and use the value in our copy of the |
| 376 | * FADT. It may not be the same if an interrupt source override exists |
| 377 | * for the SCI. |
| 378 | */ |
| 379 | gsi = acpi_gbl_FADT.sci_interrupt; |
| 380 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
| 381 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", |
| 382 | gsi); |
| 383 | return AE_OK; |
| 384 | } |
| 385 | |
| 386 | acpi_irq_handler = handler; |
| 387 | acpi_irq_context = context; |
| 388 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
| 389 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
| 390 | return AE_NOT_ACQUIRED; |
| 391 | } |
| 392 | acpi_irq_irq = irq; |
| 393 | |
| 394 | return AE_OK; |
| 395 | } |
| 396 | |
| 397 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
| 398 | { |
| 399 | if (irq) { |
| 400 | free_irq(irq, acpi_irq); |
| 401 | acpi_irq_handler = NULL; |
| 402 | acpi_irq_irq = 0; |
| 403 | } |
| 404 | |
| 405 | return AE_OK; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Running in interpreter thread context, safe to sleep |
| 410 | */ |
| 411 | |
| 412 | void acpi_os_sleep(acpi_integer ms) |
| 413 | { |
| 414 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
| 415 | } |
| 416 | |
| 417 | void acpi_os_stall(u32 us) |
| 418 | { |
| 419 | while (us) { |
| 420 | u32 delay = 1000; |
| 421 | |
| 422 | if (delay > us) |
| 423 | delay = us; |
| 424 | udelay(delay); |
| 425 | touch_nmi_watchdog(); |
| 426 | us -= delay; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * Support ACPI 3.0 AML Timer operand |
| 432 | * Returns 64-bit free-running, monotonically increasing timer |
| 433 | * with 100ns granularity |
| 434 | */ |
| 435 | u64 acpi_os_get_timer(void) |
| 436 | { |
| 437 | static u64 t; |
| 438 | |
| 439 | #ifdef CONFIG_HPET |
| 440 | /* TBD: use HPET if available */ |
| 441 | #endif |
| 442 | |
| 443 | #ifdef CONFIG_X86_PM_TIMER |
| 444 | /* TBD: default to PM timer if HPET was not available */ |
| 445 | #endif |
| 446 | if (!t) |
| 447 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); |
| 448 | |
| 449 | return ++t; |
| 450 | } |
| 451 | |
| 452 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
| 453 | { |
| 454 | u32 dummy; |
| 455 | |
| 456 | if (!value) |
| 457 | value = &dummy; |
| 458 | |
| 459 | *value = 0; |
| 460 | if (width <= 8) { |
| 461 | *(u8 *) value = inb(port); |
| 462 | } else if (width <= 16) { |
| 463 | *(u16 *) value = inw(port); |
| 464 | } else if (width <= 32) { |
| 465 | *(u32 *) value = inl(port); |
| 466 | } else { |
| 467 | BUG(); |
| 468 | } |
| 469 | |
| 470 | return AE_OK; |
| 471 | } |
| 472 | |
| 473 | EXPORT_SYMBOL(acpi_os_read_port); |
| 474 | |
| 475 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
| 476 | { |
| 477 | if (width <= 8) { |
| 478 | outb(value, port); |
| 479 | } else if (width <= 16) { |
| 480 | outw(value, port); |
| 481 | } else if (width <= 32) { |
| 482 | outl(value, port); |
| 483 | } else { |
| 484 | BUG(); |
| 485 | } |
| 486 | |
| 487 | return AE_OK; |
| 488 | } |
| 489 | |
| 490 | EXPORT_SYMBOL(acpi_os_write_port); |
| 491 | |
| 492 | acpi_status |
| 493 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
| 494 | { |
| 495 | u32 dummy; |
| 496 | void __iomem *virt_addr; |
| 497 | |
| 498 | virt_addr = ioremap(phys_addr, width); |
| 499 | if (!value) |
| 500 | value = &dummy; |
| 501 | |
| 502 | switch (width) { |
| 503 | case 8: |
| 504 | *(u8 *) value = readb(virt_addr); |
| 505 | break; |
| 506 | case 16: |
| 507 | *(u16 *) value = readw(virt_addr); |
| 508 | break; |
| 509 | case 32: |
| 510 | *(u32 *) value = readl(virt_addr); |
| 511 | break; |
| 512 | default: |
| 513 | BUG(); |
| 514 | } |
| 515 | |
| 516 | iounmap(virt_addr); |
| 517 | |
| 518 | return AE_OK; |
| 519 | } |
| 520 | |
| 521 | acpi_status |
| 522 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
| 523 | { |
| 524 | void __iomem *virt_addr; |
| 525 | |
| 526 | virt_addr = ioremap(phys_addr, width); |
| 527 | |
| 528 | switch (width) { |
| 529 | case 8: |
| 530 | writeb(value, virt_addr); |
| 531 | break; |
| 532 | case 16: |
| 533 | writew(value, virt_addr); |
| 534 | break; |
| 535 | case 32: |
| 536 | writel(value, virt_addr); |
| 537 | break; |
| 538 | default: |
| 539 | BUG(); |
| 540 | } |
| 541 | |
| 542 | iounmap(virt_addr); |
| 543 | |
| 544 | return AE_OK; |
| 545 | } |
| 546 | |
| 547 | acpi_status |
| 548 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 549 | u32 *value, u32 width) |
| 550 | { |
| 551 | int result, size; |
| 552 | |
| 553 | if (!value) |
| 554 | return AE_BAD_PARAMETER; |
| 555 | |
| 556 | switch (width) { |
| 557 | case 8: |
| 558 | size = 1; |
| 559 | break; |
| 560 | case 16: |
| 561 | size = 2; |
| 562 | break; |
| 563 | case 32: |
| 564 | size = 4; |
| 565 | break; |
| 566 | default: |
| 567 | return AE_ERROR; |
| 568 | } |
| 569 | |
| 570 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
| 571 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 572 | reg, size, value); |
| 573 | |
| 574 | return (result ? AE_ERROR : AE_OK); |
| 575 | } |
| 576 | |
| 577 | acpi_status |
| 578 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 579 | acpi_integer value, u32 width) |
| 580 | { |
| 581 | int result, size; |
| 582 | |
| 583 | switch (width) { |
| 584 | case 8: |
| 585 | size = 1; |
| 586 | break; |
| 587 | case 16: |
| 588 | size = 2; |
| 589 | break; |
| 590 | case 32: |
| 591 | size = 4; |
| 592 | break; |
| 593 | default: |
| 594 | return AE_ERROR; |
| 595 | } |
| 596 | |
| 597 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
| 598 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 599 | reg, size, value); |
| 600 | |
| 601 | return (result ? AE_ERROR : AE_OK); |
| 602 | } |
| 603 | |
| 604 | /* TODO: Change code to take advantage of driver model more */ |
| 605 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
| 606 | acpi_handle chandle, /* current node */ |
| 607 | struct acpi_pci_id **id, |
| 608 | int *is_bridge, u8 * bus_number) |
| 609 | { |
| 610 | acpi_handle handle; |
| 611 | struct acpi_pci_id *pci_id = *id; |
| 612 | acpi_status status; |
| 613 | unsigned long long temp; |
| 614 | acpi_object_type type; |
| 615 | |
| 616 | acpi_get_parent(chandle, &handle); |
| 617 | if (handle != rhandle) { |
| 618 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
| 619 | bus_number); |
| 620 | |
| 621 | status = acpi_get_type(handle, &type); |
| 622 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
| 623 | return; |
| 624 | |
| 625 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
| 626 | &temp); |
| 627 | if (ACPI_SUCCESS(status)) { |
| 628 | u32 val; |
| 629 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
| 630 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); |
| 631 | |
| 632 | if (*is_bridge) |
| 633 | pci_id->bus = *bus_number; |
| 634 | |
| 635 | /* any nicer way to get bus number of bridge ? */ |
| 636 | status = |
| 637 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
| 638 | 8); |
| 639 | if (ACPI_SUCCESS(status) |
| 640 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
| 641 | status = |
| 642 | acpi_os_read_pci_configuration(pci_id, 0x18, |
| 643 | &val, 8); |
| 644 | if (!ACPI_SUCCESS(status)) { |
| 645 | /* Certainly broken... FIX ME */ |
| 646 | return; |
| 647 | } |
| 648 | *is_bridge = 1; |
| 649 | pci_id->bus = val; |
| 650 | status = |
| 651 | acpi_os_read_pci_configuration(pci_id, 0x19, |
| 652 | &val, 8); |
| 653 | if (ACPI_SUCCESS(status)) { |
| 654 | *bus_number = val; |
| 655 | } |
| 656 | } else |
| 657 | *is_bridge = 0; |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
| 663 | acpi_handle chandle, /* current node */ |
| 664 | struct acpi_pci_id **id) |
| 665 | { |
| 666 | int is_bridge = 1; |
| 667 | u8 bus_number = (*id)->bus; |
| 668 | |
| 669 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); |
| 670 | } |
| 671 | |
| 672 | static void acpi_os_execute_deferred(struct work_struct *work) |
| 673 | { |
| 674 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); |
| 675 | if (!dpc) { |
| 676 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
| 677 | return; |
| 678 | } |
| 679 | |
| 680 | dpc->function(dpc->context); |
| 681 | kfree(dpc); |
| 682 | |
| 683 | return; |
| 684 | } |
| 685 | |
| 686 | static void acpi_os_execute_hp_deferred(struct work_struct *work) |
| 687 | { |
| 688 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); |
| 689 | if (!dpc) { |
| 690 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
| 691 | return; |
| 692 | } |
| 693 | |
| 694 | acpi_os_wait_events_complete(NULL); |
| 695 | |
| 696 | dpc->function(dpc->context); |
| 697 | kfree(dpc); |
| 698 | |
| 699 | return; |
| 700 | } |
| 701 | |
| 702 | /******************************************************************************* |
| 703 | * |
| 704 | * FUNCTION: acpi_os_execute |
| 705 | * |
| 706 | * PARAMETERS: Type - Type of the callback |
| 707 | * Function - Function to be executed |
| 708 | * Context - Function parameters |
| 709 | * |
| 710 | * RETURN: Status |
| 711 | * |
| 712 | * DESCRIPTION: Depending on type, either queues function for deferred execution or |
| 713 | * immediately executes function on a separate thread. |
| 714 | * |
| 715 | ******************************************************************************/ |
| 716 | |
| 717 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
| 718 | acpi_osd_exec_callback function, void *context, int hp) |
| 719 | { |
| 720 | acpi_status status = AE_OK; |
| 721 | struct acpi_os_dpc *dpc; |
| 722 | struct workqueue_struct *queue; |
| 723 | work_func_t func; |
| 724 | int ret; |
| 725 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 726 | "Scheduling function [%p(%p)] for deferred execution.\n", |
| 727 | function, context)); |
| 728 | |
| 729 | if (!function) |
| 730 | return AE_BAD_PARAMETER; |
| 731 | |
| 732 | /* |
| 733 | * Allocate/initialize DPC structure. Note that this memory will be |
| 734 | * freed by the callee. The kernel handles the work_struct list in a |
| 735 | * way that allows us to also free its memory inside the callee. |
| 736 | * Because we may want to schedule several tasks with different |
| 737 | * parameters we can't use the approach some kernel code uses of |
| 738 | * having a static work_struct. |
| 739 | */ |
| 740 | |
| 741 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
| 742 | if (!dpc) |
| 743 | return AE_NO_MEMORY; |
| 744 | |
| 745 | dpc->function = function; |
| 746 | dpc->context = context; |
| 747 | |
| 748 | /* |
| 749 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq |
| 750 | * because the hotplug code may call driver .remove() functions, |
| 751 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete |
| 752 | * to flush these workqueues. |
| 753 | */ |
| 754 | queue = hp ? kacpi_hotplug_wq : |
| 755 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); |
| 756 | func = hp ? acpi_os_execute_hp_deferred : acpi_os_execute_deferred; |
| 757 | INIT_WORK(&dpc->work, func); |
| 758 | ret = queue_work(queue, &dpc->work); |
| 759 | |
| 760 | if (!ret) { |
| 761 | printk(KERN_ERR PREFIX |
| 762 | "Call to queue_work() failed.\n"); |
| 763 | status = AE_ERROR; |
| 764 | kfree(dpc); |
| 765 | } |
| 766 | return status; |
| 767 | } |
| 768 | |
| 769 | acpi_status acpi_os_execute(acpi_execute_type type, |
| 770 | acpi_osd_exec_callback function, void *context) |
| 771 | { |
| 772 | return __acpi_os_execute(type, function, context, 0); |
| 773 | } |
| 774 | EXPORT_SYMBOL(acpi_os_execute); |
| 775 | |
| 776 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
| 777 | void *context) |
| 778 | { |
| 779 | return __acpi_os_execute(0, function, context, 1); |
| 780 | } |
| 781 | |
| 782 | void acpi_os_wait_events_complete(void *context) |
| 783 | { |
| 784 | flush_workqueue(kacpid_wq); |
| 785 | flush_workqueue(kacpi_notify_wq); |
| 786 | } |
| 787 | |
| 788 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
| 789 | |
| 790 | /* |
| 791 | * Allocate the memory for a spinlock and initialize it. |
| 792 | */ |
| 793 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
| 794 | { |
| 795 | spin_lock_init(*handle); |
| 796 | |
| 797 | return AE_OK; |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * Deallocate the memory for a spinlock. |
| 802 | */ |
| 803 | void acpi_os_delete_lock(acpi_spinlock handle) |
| 804 | { |
| 805 | return; |
| 806 | } |
| 807 | |
| 808 | acpi_status |
| 809 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
| 810 | { |
| 811 | struct semaphore *sem = NULL; |
| 812 | |
| 813 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
| 814 | if (!sem) |
| 815 | return AE_NO_MEMORY; |
| 816 | memset(sem, 0, sizeof(struct semaphore)); |
| 817 | |
| 818 | sema_init(sem, initial_units); |
| 819 | |
| 820 | *handle = (acpi_handle *) sem; |
| 821 | |
| 822 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
| 823 | *handle, initial_units)); |
| 824 | |
| 825 | return AE_OK; |
| 826 | } |
| 827 | |
| 828 | /* |
| 829 | * TODO: A better way to delete semaphores? Linux doesn't have a |
| 830 | * 'delete_semaphore()' function -- may result in an invalid |
| 831 | * pointer dereference for non-synchronized consumers. Should |
| 832 | * we at least check for blocked threads and signal/cancel them? |
| 833 | */ |
| 834 | |
| 835 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
| 836 | { |
| 837 | struct semaphore *sem = (struct semaphore *)handle; |
| 838 | |
| 839 | if (!sem) |
| 840 | return AE_BAD_PARAMETER; |
| 841 | |
| 842 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
| 843 | |
| 844 | BUG_ON(!list_empty(&sem->wait_list)); |
| 845 | kfree(sem); |
| 846 | sem = NULL; |
| 847 | |
| 848 | return AE_OK; |
| 849 | } |
| 850 | |
| 851 | /* |
| 852 | * TODO: Support for units > 1? |
| 853 | */ |
| 854 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
| 855 | { |
| 856 | acpi_status status = AE_OK; |
| 857 | struct semaphore *sem = (struct semaphore *)handle; |
| 858 | long jiffies; |
| 859 | int ret = 0; |
| 860 | |
| 861 | if (!sem || (units < 1)) |
| 862 | return AE_BAD_PARAMETER; |
| 863 | |
| 864 | if (units > 1) |
| 865 | return AE_SUPPORT; |
| 866 | |
| 867 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
| 868 | handle, units, timeout)); |
| 869 | |
| 870 | if (timeout == ACPI_WAIT_FOREVER) |
| 871 | jiffies = MAX_SCHEDULE_TIMEOUT; |
| 872 | else |
| 873 | jiffies = msecs_to_jiffies(timeout); |
| 874 | |
| 875 | ret = down_timeout(sem, jiffies); |
| 876 | if (ret) |
| 877 | status = AE_TIME; |
| 878 | |
| 879 | if (ACPI_FAILURE(status)) { |
| 880 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 881 | "Failed to acquire semaphore[%p|%d|%d], %s", |
| 882 | handle, units, timeout, |
| 883 | acpi_format_exception(status))); |
| 884 | } else { |
| 885 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 886 | "Acquired semaphore[%p|%d|%d]", handle, |
| 887 | units, timeout)); |
| 888 | } |
| 889 | |
| 890 | return status; |
| 891 | } |
| 892 | |
| 893 | /* |
| 894 | * TODO: Support for units > 1? |
| 895 | */ |
| 896 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
| 897 | { |
| 898 | struct semaphore *sem = (struct semaphore *)handle; |
| 899 | |
| 900 | if (!sem || (units < 1)) |
| 901 | return AE_BAD_PARAMETER; |
| 902 | |
| 903 | if (units > 1) |
| 904 | return AE_SUPPORT; |
| 905 | |
| 906 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
| 907 | units)); |
| 908 | |
| 909 | up(sem); |
| 910 | |
| 911 | return AE_OK; |
| 912 | } |
| 913 | |
| 914 | #ifdef ACPI_FUTURE_USAGE |
| 915 | u32 acpi_os_get_line(char *buffer) |
| 916 | { |
| 917 | |
| 918 | #ifdef ENABLE_DEBUGGER |
| 919 | if (acpi_in_debugger) { |
| 920 | u32 chars; |
| 921 | |
| 922 | kdb_read(buffer, sizeof(line_buf)); |
| 923 | |
| 924 | /* remove the CR kdb includes */ |
| 925 | chars = strlen(buffer) - 1; |
| 926 | buffer[chars] = '\0'; |
| 927 | } |
| 928 | #endif |
| 929 | |
| 930 | return 0; |
| 931 | } |
| 932 | #endif /* ACPI_FUTURE_USAGE */ |
| 933 | |
| 934 | acpi_status acpi_os_signal(u32 function, void *info) |
| 935 | { |
| 936 | switch (function) { |
| 937 | case ACPI_SIGNAL_FATAL: |
| 938 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); |
| 939 | break; |
| 940 | case ACPI_SIGNAL_BREAKPOINT: |
| 941 | /* |
| 942 | * AML Breakpoint |
| 943 | * ACPI spec. says to treat it as a NOP unless |
| 944 | * you are debugging. So if/when we integrate |
| 945 | * AML debugger into the kernel debugger its |
| 946 | * hook will go here. But until then it is |
| 947 | * not useful to print anything on breakpoints. |
| 948 | */ |
| 949 | break; |
| 950 | default: |
| 951 | break; |
| 952 | } |
| 953 | |
| 954 | return AE_OK; |
| 955 | } |
| 956 | |
| 957 | static int __init acpi_os_name_setup(char *str) |
| 958 | { |
| 959 | char *p = acpi_os_name; |
| 960 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
| 961 | |
| 962 | if (!str || !*str) |
| 963 | return 0; |
| 964 | |
| 965 | for (; count-- && str && *str; str++) { |
| 966 | if (isalnum(*str) || *str == ' ' || *str == ':') |
| 967 | *p++ = *str; |
| 968 | else if (*str == '\'' || *str == '"') |
| 969 | continue; |
| 970 | else |
| 971 | break; |
| 972 | } |
| 973 | *p = 0; |
| 974 | |
| 975 | return 1; |
| 976 | |
| 977 | } |
| 978 | |
| 979 | __setup("acpi_os_name=", acpi_os_name_setup); |
| 980 | |
| 981 | static void __init set_osi_linux(unsigned int enable) |
| 982 | { |
| 983 | if (osi_linux.enable != enable) { |
| 984 | osi_linux.enable = enable; |
| 985 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", |
| 986 | enable ? "Add": "Delet"); |
| 987 | } |
| 988 | return; |
| 989 | } |
| 990 | |
| 991 | static void __init acpi_cmdline_osi_linux(unsigned int enable) |
| 992 | { |
| 993 | osi_linux.cmdline = 1; /* cmdline set the default */ |
| 994 | set_osi_linux(enable); |
| 995 | |
| 996 | return; |
| 997 | } |
| 998 | |
| 999 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) |
| 1000 | { |
| 1001 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
| 1002 | |
| 1003 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
| 1004 | |
| 1005 | if (enable == -1) |
| 1006 | return; |
| 1007 | |
| 1008 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ |
| 1009 | |
| 1010 | set_osi_linux(enable); |
| 1011 | |
| 1012 | return; |
| 1013 | } |
| 1014 | |
| 1015 | /* |
| 1016 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
| 1017 | * |
| 1018 | * empty string disables _OSI |
| 1019 | * string starting with '!' disables that string |
| 1020 | * otherwise string is added to list, augmenting built-in strings |
| 1021 | */ |
| 1022 | int __init acpi_osi_setup(char *str) |
| 1023 | { |
| 1024 | if (str == NULL || *str == '\0') { |
| 1025 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); |
| 1026 | acpi_gbl_create_osi_method = FALSE; |
| 1027 | } else if (!strcmp("!Linux", str)) { |
| 1028 | acpi_cmdline_osi_linux(0); /* !enable */ |
| 1029 | } else if (*str == '!') { |
| 1030 | if (acpi_osi_invalidate(++str) == AE_OK) |
| 1031 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); |
| 1032 | } else if (!strcmp("Linux", str)) { |
| 1033 | acpi_cmdline_osi_linux(1); /* enable */ |
| 1034 | } else if (*osi_additional_string == '\0') { |
| 1035 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); |
| 1036 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); |
| 1037 | } |
| 1038 | |
| 1039 | return 1; |
| 1040 | } |
| 1041 | |
| 1042 | __setup("acpi_osi=", acpi_osi_setup); |
| 1043 | |
| 1044 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ |
| 1045 | static int __init acpi_serialize_setup(char *str) |
| 1046 | { |
| 1047 | printk(KERN_INFO PREFIX "serialize enabled\n"); |
| 1048 | |
| 1049 | acpi_gbl_all_methods_serialized = TRUE; |
| 1050 | |
| 1051 | return 1; |
| 1052 | } |
| 1053 | |
| 1054 | __setup("acpi_serialize", acpi_serialize_setup); |
| 1055 | |
| 1056 | /* |
| 1057 | * Wake and Run-Time GPES are expected to be separate. |
| 1058 | * We disable wake-GPEs at run-time to prevent spurious |
| 1059 | * interrupts. |
| 1060 | * |
| 1061 | * However, if a system exists that shares Wake and |
| 1062 | * Run-time events on the same GPE this flag is available |
| 1063 | * to tell Linux to keep the wake-time GPEs enabled at run-time. |
| 1064 | */ |
| 1065 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
| 1066 | { |
| 1067 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); |
| 1068 | |
| 1069 | acpi_gbl_leave_wake_gpes_disabled = FALSE; |
| 1070 | |
| 1071 | return 1; |
| 1072 | } |
| 1073 | |
| 1074 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); |
| 1075 | |
| 1076 | /* Check of resource interference between native drivers and ACPI |
| 1077 | * OperationRegions (SystemIO and System Memory only). |
| 1078 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem |
| 1079 | * in arbitrary AML code and can interfere with legacy drivers. |
| 1080 | * acpi_enforce_resources= can be set to: |
| 1081 | * |
| 1082 | * - strict (default) (2) |
| 1083 | * -> further driver trying to access the resources will not load |
| 1084 | * - lax (1) |
| 1085 | * -> further driver trying to access the resources will load, but you |
| 1086 | * get a system message that something might go wrong... |
| 1087 | * |
| 1088 | * - no (0) |
| 1089 | * -> ACPI Operation Region resources will not be registered |
| 1090 | * |
| 1091 | */ |
| 1092 | #define ENFORCE_RESOURCES_STRICT 2 |
| 1093 | #define ENFORCE_RESOURCES_LAX 1 |
| 1094 | #define ENFORCE_RESOURCES_NO 0 |
| 1095 | |
| 1096 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1097 | |
| 1098 | static int __init acpi_enforce_resources_setup(char *str) |
| 1099 | { |
| 1100 | if (str == NULL || *str == '\0') |
| 1101 | return 0; |
| 1102 | |
| 1103 | if (!strcmp("strict", str)) |
| 1104 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1105 | else if (!strcmp("lax", str)) |
| 1106 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; |
| 1107 | else if (!strcmp("no", str)) |
| 1108 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; |
| 1109 | |
| 1110 | return 1; |
| 1111 | } |
| 1112 | |
| 1113 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); |
| 1114 | |
| 1115 | /* Check for resource conflicts between ACPI OperationRegions and native |
| 1116 | * drivers */ |
| 1117 | int acpi_check_resource_conflict(struct resource *res) |
| 1118 | { |
| 1119 | struct acpi_res_list *res_list_elem; |
| 1120 | int ioport; |
| 1121 | int clash = 0; |
| 1122 | |
| 1123 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
| 1124 | return 0; |
| 1125 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) |
| 1126 | return 0; |
| 1127 | |
| 1128 | ioport = res->flags & IORESOURCE_IO; |
| 1129 | |
| 1130 | spin_lock(&acpi_res_lock); |
| 1131 | list_for_each_entry(res_list_elem, &resource_list_head, |
| 1132 | resource_list) { |
| 1133 | if (ioport && (res_list_elem->resource_type |
| 1134 | != ACPI_ADR_SPACE_SYSTEM_IO)) |
| 1135 | continue; |
| 1136 | if (!ioport && (res_list_elem->resource_type |
| 1137 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) |
| 1138 | continue; |
| 1139 | |
| 1140 | if (res->end < res_list_elem->start |
| 1141 | || res_list_elem->end < res->start) |
| 1142 | continue; |
| 1143 | clash = 1; |
| 1144 | break; |
| 1145 | } |
| 1146 | spin_unlock(&acpi_res_lock); |
| 1147 | |
| 1148 | if (clash) { |
| 1149 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { |
| 1150 | printk("%sACPI: %s resource %s [0x%llx-0x%llx]" |
| 1151 | " conflicts with ACPI region %s" |
| 1152 | " [0x%llx-0x%llx]\n", |
| 1153 | acpi_enforce_resources == ENFORCE_RESOURCES_LAX |
| 1154 | ? KERN_WARNING : KERN_ERR, |
| 1155 | ioport ? "I/O" : "Memory", res->name, |
| 1156 | (long long) res->start, (long long) res->end, |
| 1157 | res_list_elem->name, |
| 1158 | (long long) res_list_elem->start, |
| 1159 | (long long) res_list_elem->end); |
| 1160 | printk(KERN_INFO "ACPI: Device needs an ACPI driver\n"); |
| 1161 | } |
| 1162 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) |
| 1163 | return -EBUSY; |
| 1164 | } |
| 1165 | return 0; |
| 1166 | } |
| 1167 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
| 1168 | |
| 1169 | int acpi_check_region(resource_size_t start, resource_size_t n, |
| 1170 | const char *name) |
| 1171 | { |
| 1172 | struct resource res = { |
| 1173 | .start = start, |
| 1174 | .end = start + n - 1, |
| 1175 | .name = name, |
| 1176 | .flags = IORESOURCE_IO, |
| 1177 | }; |
| 1178 | |
| 1179 | return acpi_check_resource_conflict(&res); |
| 1180 | } |
| 1181 | EXPORT_SYMBOL(acpi_check_region); |
| 1182 | |
| 1183 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, |
| 1184 | const char *name) |
| 1185 | { |
| 1186 | struct resource res = { |
| 1187 | .start = start, |
| 1188 | .end = start + n - 1, |
| 1189 | .name = name, |
| 1190 | .flags = IORESOURCE_MEM, |
| 1191 | }; |
| 1192 | |
| 1193 | return acpi_check_resource_conflict(&res); |
| 1194 | |
| 1195 | } |
| 1196 | EXPORT_SYMBOL(acpi_check_mem_region); |
| 1197 | |
| 1198 | /* |
| 1199 | * Acquire a spinlock. |
| 1200 | * |
| 1201 | * handle is a pointer to the spinlock_t. |
| 1202 | */ |
| 1203 | |
| 1204 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
| 1205 | { |
| 1206 | acpi_cpu_flags flags; |
| 1207 | spin_lock_irqsave(lockp, flags); |
| 1208 | return flags; |
| 1209 | } |
| 1210 | |
| 1211 | /* |
| 1212 | * Release a spinlock. See above. |
| 1213 | */ |
| 1214 | |
| 1215 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
| 1216 | { |
| 1217 | spin_unlock_irqrestore(lockp, flags); |
| 1218 | } |
| 1219 | |
| 1220 | #ifndef ACPI_USE_LOCAL_CACHE |
| 1221 | |
| 1222 | /******************************************************************************* |
| 1223 | * |
| 1224 | * FUNCTION: acpi_os_create_cache |
| 1225 | * |
| 1226 | * PARAMETERS: name - Ascii name for the cache |
| 1227 | * size - Size of each cached object |
| 1228 | * depth - Maximum depth of the cache (in objects) <ignored> |
| 1229 | * cache - Where the new cache object is returned |
| 1230 | * |
| 1231 | * RETURN: status |
| 1232 | * |
| 1233 | * DESCRIPTION: Create a cache object |
| 1234 | * |
| 1235 | ******************************************************************************/ |
| 1236 | |
| 1237 | acpi_status |
| 1238 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
| 1239 | { |
| 1240 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
| 1241 | if (*cache == NULL) |
| 1242 | return AE_ERROR; |
| 1243 | else |
| 1244 | return AE_OK; |
| 1245 | } |
| 1246 | |
| 1247 | /******************************************************************************* |
| 1248 | * |
| 1249 | * FUNCTION: acpi_os_purge_cache |
| 1250 | * |
| 1251 | * PARAMETERS: Cache - Handle to cache object |
| 1252 | * |
| 1253 | * RETURN: Status |
| 1254 | * |
| 1255 | * DESCRIPTION: Free all objects within the requested cache. |
| 1256 | * |
| 1257 | ******************************************************************************/ |
| 1258 | |
| 1259 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
| 1260 | { |
| 1261 | kmem_cache_shrink(cache); |
| 1262 | return (AE_OK); |
| 1263 | } |
| 1264 | |
| 1265 | /******************************************************************************* |
| 1266 | * |
| 1267 | * FUNCTION: acpi_os_delete_cache |
| 1268 | * |
| 1269 | * PARAMETERS: Cache - Handle to cache object |
| 1270 | * |
| 1271 | * RETURN: Status |
| 1272 | * |
| 1273 | * DESCRIPTION: Free all objects within the requested cache and delete the |
| 1274 | * cache object. |
| 1275 | * |
| 1276 | ******************************************************************************/ |
| 1277 | |
| 1278 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
| 1279 | { |
| 1280 | kmem_cache_destroy(cache); |
| 1281 | return (AE_OK); |
| 1282 | } |
| 1283 | |
| 1284 | /******************************************************************************* |
| 1285 | * |
| 1286 | * FUNCTION: acpi_os_release_object |
| 1287 | * |
| 1288 | * PARAMETERS: Cache - Handle to cache object |
| 1289 | * Object - The object to be released |
| 1290 | * |
| 1291 | * RETURN: None |
| 1292 | * |
| 1293 | * DESCRIPTION: Release an object to the specified cache. If cache is full, |
| 1294 | * the object is deleted. |
| 1295 | * |
| 1296 | ******************************************************************************/ |
| 1297 | |
| 1298 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
| 1299 | { |
| 1300 | kmem_cache_free(cache, object); |
| 1301 | return (AE_OK); |
| 1302 | } |
| 1303 | |
| 1304 | /****************************************************************************** |
| 1305 | * |
| 1306 | * FUNCTION: acpi_os_validate_interface |
| 1307 | * |
| 1308 | * PARAMETERS: interface - Requested interface to be validated |
| 1309 | * |
| 1310 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise |
| 1311 | * |
| 1312 | * DESCRIPTION: Match an interface string to the interfaces supported by the |
| 1313 | * host. Strings originate from an AML call to the _OSI method. |
| 1314 | * |
| 1315 | *****************************************************************************/ |
| 1316 | |
| 1317 | acpi_status |
| 1318 | acpi_os_validate_interface (char *interface) |
| 1319 | { |
| 1320 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
| 1321 | return AE_OK; |
| 1322 | if (!strcmp("Linux", interface)) { |
| 1323 | |
| 1324 | printk(KERN_NOTICE PREFIX |
| 1325 | "BIOS _OSI(Linux) query %s%s\n", |
| 1326 | osi_linux.enable ? "honored" : "ignored", |
| 1327 | osi_linux.cmdline ? " via cmdline" : |
| 1328 | osi_linux.dmi ? " via DMI" : ""); |
| 1329 | |
| 1330 | if (osi_linux.enable) |
| 1331 | return AE_OK; |
| 1332 | } |
| 1333 | return AE_SUPPORT; |
| 1334 | } |
| 1335 | |
| 1336 | /****************************************************************************** |
| 1337 | * |
| 1338 | * FUNCTION: acpi_os_validate_address |
| 1339 | * |
| 1340 | * PARAMETERS: space_id - ACPI space ID |
| 1341 | * address - Physical address |
| 1342 | * length - Address length |
| 1343 | * |
| 1344 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, |
| 1345 | * should return AE_AML_ILLEGAL_ADDRESS. |
| 1346 | * |
| 1347 | * DESCRIPTION: Validate a system address via the host OS. Used to validate |
| 1348 | * the addresses accessed by AML operation regions. |
| 1349 | * |
| 1350 | *****************************************************************************/ |
| 1351 | |
| 1352 | acpi_status |
| 1353 | acpi_os_validate_address ( |
| 1354 | u8 space_id, |
| 1355 | acpi_physical_address address, |
| 1356 | acpi_size length, |
| 1357 | char *name) |
| 1358 | { |
| 1359 | struct acpi_res_list *res; |
| 1360 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
| 1361 | return AE_OK; |
| 1362 | |
| 1363 | switch (space_id) { |
| 1364 | case ACPI_ADR_SPACE_SYSTEM_IO: |
| 1365 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: |
| 1366 | /* Only interference checks against SystemIO and SytemMemory |
| 1367 | are needed */ |
| 1368 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); |
| 1369 | if (!res) |
| 1370 | return AE_OK; |
| 1371 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ |
| 1372 | strlcpy(res->name, name, 5); |
| 1373 | res->start = address; |
| 1374 | res->end = address + length - 1; |
| 1375 | res->resource_type = space_id; |
| 1376 | spin_lock(&acpi_res_lock); |
| 1377 | list_add(&res->resource_list, &resource_list_head); |
| 1378 | spin_unlock(&acpi_res_lock); |
| 1379 | pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, " |
| 1380 | "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
| 1381 | ? "SystemIO" : "System Memory", |
| 1382 | (unsigned long long)res->start, |
| 1383 | (unsigned long long)res->end, |
| 1384 | res->name); |
| 1385 | break; |
| 1386 | case ACPI_ADR_SPACE_PCI_CONFIG: |
| 1387 | case ACPI_ADR_SPACE_EC: |
| 1388 | case ACPI_ADR_SPACE_SMBUS: |
| 1389 | case ACPI_ADR_SPACE_CMOS: |
| 1390 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: |
| 1391 | case ACPI_ADR_SPACE_DATA_TABLE: |
| 1392 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
| 1393 | break; |
| 1394 | } |
| 1395 | return AE_OK; |
| 1396 | } |
| 1397 | |
| 1398 | #endif |