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 int wait; 62 }; 63 64 #ifdef CONFIG_ACPI_CUSTOM_DSDT 65 #include CONFIG_ACPI_CUSTOM_DSDT_FILE 66 #endif 67 68 #ifdef ENABLE_DEBUGGER 69 #include <linux/kdb.h> 70 71 /* stuff for debugger support */ 72 int acpi_in_debugger; 73 EXPORT_SYMBOL(acpi_in_debugger); 74 75 extern char line_buf[80]; 76 #endif /*ENABLE_DEBUGGER */ 77 78 static unsigned int acpi_irq_irq; 79 static acpi_osd_handler acpi_irq_handler; 80 static void *acpi_irq_context; 81 static struct workqueue_struct *kacpid_wq; 82 static struct workqueue_struct *kacpi_notify_wq; 83 static struct workqueue_struct *kacpi_hotplug_wq; 84 85 struct acpi_res_list { 86 resource_size_t start; 87 resource_size_t end; 88 acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ 89 char name[5]; /* only can have a length of 4 chars, make use of this 90 one instead of res->name, no need to kalloc then */ 91 struct list_head resource_list; 92 int count; 93 }; 94 95 static LIST_HEAD(resource_list_head); 96 static DEFINE_SPINLOCK(acpi_res_lock); 97 98 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ 99 static char osi_additional_string[OSI_STRING_LENGTH_MAX]; 100 101 /* 102 * The story of _OSI(Linux) 103 * 104 * From pre-history through Linux-2.6.22, 105 * Linux responded TRUE upon a BIOS OSI(Linux) query. 106 * 107 * Unfortunately, reference BIOS writers got wind of this 108 * and put OSI(Linux) in their example code, quickly exposing 109 * this string as ill-conceived and opening the door to 110 * an un-bounded number of BIOS incompatibilities. 111 * 112 * For example, OSI(Linux) was used on resume to re-POST a 113 * video card on one system, because Linux at that time 114 * could not do a speedy restore in its native driver. 115 * But then upon gaining quick native restore capability, 116 * Linux has no way to tell the BIOS to skip the time-consuming 117 * POST -- putting Linux at a permanent performance disadvantage. 118 * On another system, the BIOS writer used OSI(Linux) 119 * to infer native OS support for IPMI! On other systems, 120 * OSI(Linux) simply got in the way of Linux claiming to 121 * be compatible with other operating systems, exposing 122 * BIOS issues such as skipped device initialization. 123 * 124 * So "Linux" turned out to be a really poor chose of 125 * OSI string, and from Linux-2.6.23 onward we respond FALSE. 126 * 127 * BIOS writers should NOT query _OSI(Linux) on future systems. 128 * Linux will complain on the console when it sees it, and return FALSE. 129 * To get Linux to return TRUE for your system will require 130 * a kernel source update to add a DMI entry, 131 * or boot with "acpi_osi=Linux" 132 */ 133 134 static struct osi_linux { 135 unsigned int enable:1; 136 unsigned int dmi:1; 137 unsigned int cmdline:1; 138 unsigned int known:1; 139 } osi_linux = { 0, 0, 0, 0}; 140 141 static void __init acpi_request_region (struct acpi_generic_address *addr, 142 unsigned int length, char *desc) 143 { 144 struct resource *res; 145 146 if (!addr->address || !length) 147 return; 148 149 if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) 150 res = request_region(addr->address, length, desc); 151 else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) 152 res = request_mem_region(addr->address, length, desc); 153 } 154 155 static int __init acpi_reserve_resources(void) 156 { 157 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, 158 "ACPI PM1a_EVT_BLK"); 159 160 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, 161 "ACPI PM1b_EVT_BLK"); 162 163 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, 164 "ACPI PM1a_CNT_BLK"); 165 166 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, 167 "ACPI PM1b_CNT_BLK"); 168 169 if (acpi_gbl_FADT.pm_timer_length == 4) 170 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); 171 172 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, 173 "ACPI PM2_CNT_BLK"); 174 175 /* Length of GPE blocks must be a non-negative multiple of 2 */ 176 177 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) 178 acpi_request_region(&acpi_gbl_FADT.xgpe0_block, 179 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); 180 181 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) 182 acpi_request_region(&acpi_gbl_FADT.xgpe1_block, 183 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); 184 185 return 0; 186 } 187 device_initcall(acpi_reserve_resources); 188 189 acpi_status __init acpi_os_initialize(void) 190 { 191 return AE_OK; 192 } 193 194 static void bind_to_cpu0(struct work_struct *work) 195 { 196 set_cpus_allowed_ptr(current, cpumask_of(0)); 197 kfree(work); 198 } 199 200 static void bind_workqueue(struct workqueue_struct *wq) 201 { 202 struct work_struct *work; 203 204 work = kzalloc(sizeof(struct work_struct), GFP_KERNEL); 205 INIT_WORK(work, bind_to_cpu0); 206 queue_work(wq, work); 207 } 208 209 acpi_status acpi_os_initialize1(void) 210 { 211 /* 212 * On some machines, a software-initiated SMI causes corruption unless 213 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but 214 * typically it's done in GPE-related methods that are run via 215 * workqueues, so we can avoid the known corruption cases by binding 216 * the workqueues to CPU 0. 217 */ 218 kacpid_wq = create_singlethread_workqueue("kacpid"); 219 bind_workqueue(kacpid_wq); 220 kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); 221 bind_workqueue(kacpi_notify_wq); 222 kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); 223 bind_workqueue(kacpi_hotplug_wq); 224 BUG_ON(!kacpid_wq); 225 BUG_ON(!kacpi_notify_wq); 226 BUG_ON(!kacpi_hotplug_wq); 227 return AE_OK; 228 } 229 230 acpi_status acpi_os_terminate(void) 231 { 232 if (acpi_irq_handler) { 233 acpi_os_remove_interrupt_handler(acpi_irq_irq, 234 acpi_irq_handler); 235 } 236 237 destroy_workqueue(kacpid_wq); 238 destroy_workqueue(kacpi_notify_wq); 239 destroy_workqueue(kacpi_hotplug_wq); 240 241 return AE_OK; 242 } 243 244 void acpi_os_printf(const char *fmt, ...) 245 { 246 va_list args; 247 va_start(args, fmt); 248 acpi_os_vprintf(fmt, args); 249 va_end(args); 250 } 251 252 void acpi_os_vprintf(const char *fmt, va_list args) 253 { 254 static char buffer[512]; 255 256 vsprintf(buffer, fmt, args); 257 258 #ifdef ENABLE_DEBUGGER 259 if (acpi_in_debugger) { 260 kdb_printf("%s", buffer); 261 } else { 262 printk(KERN_CONT "%s", buffer); 263 } 264 #else 265 printk(KERN_CONT "%s", buffer); 266 #endif 267 } 268 269 acpi_physical_address __init acpi_os_get_root_pointer(void) 270 { 271 if (efi_enabled) { 272 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 273 return efi.acpi20; 274 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 275 return efi.acpi; 276 else { 277 printk(KERN_ERR PREFIX 278 "System description tables not found\n"); 279 return 0; 280 } 281 } else { 282 acpi_physical_address pa = 0; 283 284 acpi_find_root_pointer(&pa); 285 return pa; 286 } 287 } 288 289 void __iomem *__init_refok 290 acpi_os_map_memory(acpi_physical_address phys, acpi_size size) 291 { 292 if (phys > ULONG_MAX) { 293 printk(KERN_ERR PREFIX "Cannot map memory that high\n"); 294 return NULL; 295 } 296 if (acpi_gbl_permanent_mmap) 297 /* 298 * ioremap checks to ensure this is in reserved space 299 */ 300 return ioremap((unsigned long)phys, size); 301 else 302 return __acpi_map_table((unsigned long)phys, size); 303 } 304 EXPORT_SYMBOL_GPL(acpi_os_map_memory); 305 306 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 307 { 308 if (acpi_gbl_permanent_mmap) 309 iounmap(virt); 310 else 311 __acpi_unmap_table(virt, size); 312 } 313 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); 314 315 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 316 { 317 if (!acpi_gbl_permanent_mmap) 318 __acpi_unmap_table(virt, size); 319 } 320 321 #ifdef ACPI_FUTURE_USAGE 322 acpi_status 323 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) 324 { 325 if (!phys || !virt) 326 return AE_BAD_PARAMETER; 327 328 *phys = virt_to_phys(virt); 329 330 return AE_OK; 331 } 332 #endif 333 334 #define ACPI_MAX_OVERRIDE_LEN 100 335 336 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; 337 338 acpi_status 339 acpi_os_predefined_override(const struct acpi_predefined_names *init_val, 340 acpi_string * new_val) 341 { 342 if (!init_val || !new_val) 343 return AE_BAD_PARAMETER; 344 345 *new_val = NULL; 346 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { 347 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", 348 acpi_os_name); 349 *new_val = acpi_os_name; 350 } 351 352 return AE_OK; 353 } 354 355 acpi_status 356 acpi_os_table_override(struct acpi_table_header * existing_table, 357 struct acpi_table_header ** new_table) 358 { 359 if (!existing_table || !new_table) 360 return AE_BAD_PARAMETER; 361 362 *new_table = NULL; 363 364 #ifdef CONFIG_ACPI_CUSTOM_DSDT 365 if (strncmp(existing_table->signature, "DSDT", 4) == 0) 366 *new_table = (struct acpi_table_header *)AmlCode; 367 #endif 368 if (*new_table != NULL) { 369 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " 370 "this is unsafe: tainting kernel\n", 371 existing_table->signature, 372 existing_table->oem_table_id); 373 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); 374 } 375 return AE_OK; 376 } 377 378 static irqreturn_t acpi_irq(int irq, void *dev_id) 379 { 380 u32 handled; 381 382 handled = (*acpi_irq_handler) (acpi_irq_context); 383 384 if (handled) { 385 acpi_irq_handled++; 386 return IRQ_HANDLED; 387 } else { 388 acpi_irq_not_handled++; 389 return IRQ_NONE; 390 } 391 } 392 393 acpi_status 394 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, 395 void *context) 396 { 397 unsigned int irq; 398 399 acpi_irq_stats_init(); 400 401 /* 402 * Ignore the GSI from the core, and use the value in our copy of the 403 * FADT. It may not be the same if an interrupt source override exists 404 * for the SCI. 405 */ 406 gsi = acpi_gbl_FADT.sci_interrupt; 407 if (acpi_gsi_to_irq(gsi, &irq) < 0) { 408 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", 409 gsi); 410 return AE_OK; 411 } 412 413 acpi_irq_handler = handler; 414 acpi_irq_context = context; 415 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { 416 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); 417 return AE_NOT_ACQUIRED; 418 } 419 acpi_irq_irq = irq; 420 421 return AE_OK; 422 } 423 424 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) 425 { 426 if (irq) { 427 free_irq(irq, acpi_irq); 428 acpi_irq_handler = NULL; 429 acpi_irq_irq = 0; 430 } 431 432 return AE_OK; 433 } 434 435 /* 436 * Running in interpreter thread context, safe to sleep 437 */ 438 439 void acpi_os_sleep(u64 ms) 440 { 441 schedule_timeout_interruptible(msecs_to_jiffies(ms)); 442 } 443 444 void acpi_os_stall(u32 us) 445 { 446 while (us) { 447 u32 delay = 1000; 448 449 if (delay > us) 450 delay = us; 451 udelay(delay); 452 touch_nmi_watchdog(); 453 us -= delay; 454 } 455 } 456 457 /* 458 * Support ACPI 3.0 AML Timer operand 459 * Returns 64-bit free-running, monotonically increasing timer 460 * with 100ns granularity 461 */ 462 u64 acpi_os_get_timer(void) 463 { 464 static u64 t; 465 466 #ifdef CONFIG_HPET 467 /* TBD: use HPET if available */ 468 #endif 469 470 #ifdef CONFIG_X86_PM_TIMER 471 /* TBD: default to PM timer if HPET was not available */ 472 #endif 473 if (!t) 474 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); 475 476 return ++t; 477 } 478 479 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) 480 { 481 u32 dummy; 482 483 if (!value) 484 value = &dummy; 485 486 *value = 0; 487 if (width <= 8) { 488 *(u8 *) value = inb(port); 489 } else if (width <= 16) { 490 *(u16 *) value = inw(port); 491 } else if (width <= 32) { 492 *(u32 *) value = inl(port); 493 } else { 494 BUG(); 495 } 496 497 return AE_OK; 498 } 499 500 EXPORT_SYMBOL(acpi_os_read_port); 501 502 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) 503 { 504 if (width <= 8) { 505 outb(value, port); 506 } else if (width <= 16) { 507 outw(value, port); 508 } else if (width <= 32) { 509 outl(value, port); 510 } else { 511 BUG(); 512 } 513 514 return AE_OK; 515 } 516 517 EXPORT_SYMBOL(acpi_os_write_port); 518 519 acpi_status 520 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) 521 { 522 u32 dummy; 523 void __iomem *virt_addr; 524 525 virt_addr = ioremap(phys_addr, width); 526 if (!value) 527 value = &dummy; 528 529 switch (width) { 530 case 8: 531 *(u8 *) value = readb(virt_addr); 532 break; 533 case 16: 534 *(u16 *) value = readw(virt_addr); 535 break; 536 case 32: 537 *(u32 *) value = readl(virt_addr); 538 break; 539 default: 540 BUG(); 541 } 542 543 iounmap(virt_addr); 544 545 return AE_OK; 546 } 547 548 acpi_status 549 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) 550 { 551 void __iomem *virt_addr; 552 553 virt_addr = ioremap(phys_addr, width); 554 555 switch (width) { 556 case 8: 557 writeb(value, virt_addr); 558 break; 559 case 16: 560 writew(value, virt_addr); 561 break; 562 case 32: 563 writel(value, virt_addr); 564 break; 565 default: 566 BUG(); 567 } 568 569 iounmap(virt_addr); 570 571 return AE_OK; 572 } 573 574 acpi_status 575 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 576 u32 *value, u32 width) 577 { 578 int result, size; 579 580 if (!value) 581 return AE_BAD_PARAMETER; 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_read(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 acpi_status 605 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 606 u64 value, u32 width) 607 { 608 int result, size; 609 610 switch (width) { 611 case 8: 612 size = 1; 613 break; 614 case 16: 615 size = 2; 616 break; 617 case 32: 618 size = 4; 619 break; 620 default: 621 return AE_ERROR; 622 } 623 624 result = raw_pci_write(pci_id->segment, pci_id->bus, 625 PCI_DEVFN(pci_id->device, pci_id->function), 626 reg, size, value); 627 628 return (result ? AE_ERROR : AE_OK); 629 } 630 631 /* TODO: Change code to take advantage of driver model more */ 632 static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ 633 acpi_handle chandle, /* current node */ 634 struct acpi_pci_id **id, 635 int *is_bridge, u8 * bus_number) 636 { 637 acpi_handle handle; 638 struct acpi_pci_id *pci_id = *id; 639 acpi_status status; 640 unsigned long long temp; 641 acpi_object_type type; 642 643 acpi_get_parent(chandle, &handle); 644 if (handle != rhandle) { 645 acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, 646 bus_number); 647 648 status = acpi_get_type(handle, &type); 649 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) 650 return; 651 652 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, 653 &temp); 654 if (ACPI_SUCCESS(status)) { 655 u32 val; 656 pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); 657 pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); 658 659 if (*is_bridge) 660 pci_id->bus = *bus_number; 661 662 /* any nicer way to get bus number of bridge ? */ 663 status = 664 acpi_os_read_pci_configuration(pci_id, 0x0e, &val, 665 8); 666 if (ACPI_SUCCESS(status) 667 && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { 668 status = 669 acpi_os_read_pci_configuration(pci_id, 0x18, 670 &val, 8); 671 if (!ACPI_SUCCESS(status)) { 672 /* Certainly broken... FIX ME */ 673 return; 674 } 675 *is_bridge = 1; 676 pci_id->bus = val; 677 status = 678 acpi_os_read_pci_configuration(pci_id, 0x19, 679 &val, 8); 680 if (ACPI_SUCCESS(status)) { 681 *bus_number = val; 682 } 683 } else 684 *is_bridge = 0; 685 } 686 } 687 } 688 689 void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ 690 acpi_handle chandle, /* current node */ 691 struct acpi_pci_id **id) 692 { 693 int is_bridge = 1; 694 u8 bus_number = (*id)->bus; 695 696 acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); 697 } 698 699 static void acpi_os_execute_deferred(struct work_struct *work) 700 { 701 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); 702 703 if (dpc->wait) 704 acpi_os_wait_events_complete(NULL); 705 706 dpc->function(dpc->context); 707 kfree(dpc); 708 } 709 710 /******************************************************************************* 711 * 712 * FUNCTION: acpi_os_execute 713 * 714 * PARAMETERS: Type - Type of the callback 715 * Function - Function to be executed 716 * Context - Function parameters 717 * 718 * RETURN: Status 719 * 720 * DESCRIPTION: Depending on type, either queues function for deferred execution or 721 * immediately executes function on a separate thread. 722 * 723 ******************************************************************************/ 724 725 static acpi_status __acpi_os_execute(acpi_execute_type type, 726 acpi_osd_exec_callback function, void *context, int hp) 727 { 728 acpi_status status = AE_OK; 729 struct acpi_os_dpc *dpc; 730 struct workqueue_struct *queue; 731 int ret; 732 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 733 "Scheduling function [%p(%p)] for deferred execution.\n", 734 function, context)); 735 736 /* 737 * Allocate/initialize DPC structure. Note that this memory will be 738 * freed by the callee. The kernel handles the work_struct list in a 739 * way that allows us to also free its memory inside the callee. 740 * Because we may want to schedule several tasks with different 741 * parameters we can't use the approach some kernel code uses of 742 * having a static work_struct. 743 */ 744 745 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); 746 if (!dpc) 747 return AE_NO_MEMORY; 748 749 dpc->function = function; 750 dpc->context = context; 751 752 /* 753 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq 754 * because the hotplug code may call driver .remove() functions, 755 * which invoke flush_scheduled_work/acpi_os_wait_events_complete 756 * to flush these workqueues. 757 */ 758 queue = hp ? kacpi_hotplug_wq : 759 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); 760 dpc->wait = hp ? 1 : 0; 761 762 if (queue == kacpi_hotplug_wq) 763 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 764 else if (queue == kacpi_notify_wq) 765 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 766 else 767 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 768 769 ret = queue_work(queue, &dpc->work); 770 771 if (!ret) { 772 printk(KERN_ERR PREFIX 773 "Call to queue_work() failed.\n"); 774 status = AE_ERROR; 775 kfree(dpc); 776 } 777 return status; 778 } 779 780 acpi_status acpi_os_execute(acpi_execute_type type, 781 acpi_osd_exec_callback function, void *context) 782 { 783 return __acpi_os_execute(type, function, context, 0); 784 } 785 EXPORT_SYMBOL(acpi_os_execute); 786 787 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, 788 void *context) 789 { 790 return __acpi_os_execute(0, function, context, 1); 791 } 792 793 void acpi_os_wait_events_complete(void *context) 794 { 795 flush_workqueue(kacpid_wq); 796 flush_workqueue(kacpi_notify_wq); 797 } 798 799 EXPORT_SYMBOL(acpi_os_wait_events_complete); 800 801 /* 802 * Allocate the memory for a spinlock and initialize it. 803 */ 804 acpi_status acpi_os_create_lock(acpi_spinlock * handle) 805 { 806 spin_lock_init(*handle); 807 808 return AE_OK; 809 } 810 811 /* 812 * Deallocate the memory for a spinlock. 813 */ 814 void acpi_os_delete_lock(acpi_spinlock handle) 815 { 816 return; 817 } 818 819 acpi_status 820 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) 821 { 822 struct semaphore *sem = NULL; 823 824 sem = acpi_os_allocate(sizeof(struct semaphore)); 825 if (!sem) 826 return AE_NO_MEMORY; 827 memset(sem, 0, sizeof(struct semaphore)); 828 829 sema_init(sem, initial_units); 830 831 *handle = (acpi_handle *) sem; 832 833 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", 834 *handle, initial_units)); 835 836 return AE_OK; 837 } 838 839 /* 840 * TODO: A better way to delete semaphores? Linux doesn't have a 841 * 'delete_semaphore()' function -- may result in an invalid 842 * pointer dereference for non-synchronized consumers. Should 843 * we at least check for blocked threads and signal/cancel them? 844 */ 845 846 acpi_status acpi_os_delete_semaphore(acpi_handle handle) 847 { 848 struct semaphore *sem = (struct semaphore *)handle; 849 850 if (!sem) 851 return AE_BAD_PARAMETER; 852 853 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); 854 855 BUG_ON(!list_empty(&sem->wait_list)); 856 kfree(sem); 857 sem = NULL; 858 859 return AE_OK; 860 } 861 862 /* 863 * TODO: Support for units > 1? 864 */ 865 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) 866 { 867 acpi_status status = AE_OK; 868 struct semaphore *sem = (struct semaphore *)handle; 869 long jiffies; 870 int ret = 0; 871 872 if (!sem || (units < 1)) 873 return AE_BAD_PARAMETER; 874 875 if (units > 1) 876 return AE_SUPPORT; 877 878 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", 879 handle, units, timeout)); 880 881 if (timeout == ACPI_WAIT_FOREVER) 882 jiffies = MAX_SCHEDULE_TIMEOUT; 883 else 884 jiffies = msecs_to_jiffies(timeout); 885 886 ret = down_timeout(sem, jiffies); 887 if (ret) 888 status = AE_TIME; 889 890 if (ACPI_FAILURE(status)) { 891 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 892 "Failed to acquire semaphore[%p|%d|%d], %s", 893 handle, units, timeout, 894 acpi_format_exception(status))); 895 } else { 896 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 897 "Acquired semaphore[%p|%d|%d]", handle, 898 units, timeout)); 899 } 900 901 return status; 902 } 903 904 /* 905 * TODO: Support for units > 1? 906 */ 907 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) 908 { 909 struct semaphore *sem = (struct semaphore *)handle; 910 911 if (!sem || (units < 1)) 912 return AE_BAD_PARAMETER; 913 914 if (units > 1) 915 return AE_SUPPORT; 916 917 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, 918 units)); 919 920 up(sem); 921 922 return AE_OK; 923 } 924 925 #ifdef ACPI_FUTURE_USAGE 926 u32 acpi_os_get_line(char *buffer) 927 { 928 929 #ifdef ENABLE_DEBUGGER 930 if (acpi_in_debugger) { 931 u32 chars; 932 933 kdb_read(buffer, sizeof(line_buf)); 934 935 /* remove the CR kdb includes */ 936 chars = strlen(buffer) - 1; 937 buffer[chars] = '\0'; 938 } 939 #endif 940 941 return 0; 942 } 943 #endif /* ACPI_FUTURE_USAGE */ 944 945 acpi_status acpi_os_signal(u32 function, void *info) 946 { 947 switch (function) { 948 case ACPI_SIGNAL_FATAL: 949 printk(KERN_ERR PREFIX "Fatal opcode executed\n"); 950 break; 951 case ACPI_SIGNAL_BREAKPOINT: 952 /* 953 * AML Breakpoint 954 * ACPI spec. says to treat it as a NOP unless 955 * you are debugging. So if/when we integrate 956 * AML debugger into the kernel debugger its 957 * hook will go here. But until then it is 958 * not useful to print anything on breakpoints. 959 */ 960 break; 961 default: 962 break; 963 } 964 965 return AE_OK; 966 } 967 968 static int __init acpi_os_name_setup(char *str) 969 { 970 char *p = acpi_os_name; 971 int count = ACPI_MAX_OVERRIDE_LEN - 1; 972 973 if (!str || !*str) 974 return 0; 975 976 for (; count-- && str && *str; str++) { 977 if (isalnum(*str) || *str == ' ' || *str == ':') 978 *p++ = *str; 979 else if (*str == '\'' || *str == '"') 980 continue; 981 else 982 break; 983 } 984 *p = 0; 985 986 return 1; 987 988 } 989 990 __setup("acpi_os_name=", acpi_os_name_setup); 991 992 static void __init set_osi_linux(unsigned int enable) 993 { 994 if (osi_linux.enable != enable) { 995 osi_linux.enable = enable; 996 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", 997 enable ? "Add": "Delet"); 998 } 999 return; 1000 } 1001 1002 static void __init acpi_cmdline_osi_linux(unsigned int enable) 1003 { 1004 osi_linux.cmdline = 1; /* cmdline set the default */ 1005 set_osi_linux(enable); 1006 1007 return; 1008 } 1009 1010 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) 1011 { 1012 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ 1013 1014 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 1015 1016 if (enable == -1) 1017 return; 1018 1019 osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ 1020 1021 set_osi_linux(enable); 1022 1023 return; 1024 } 1025 1026 /* 1027 * Modify the list of "OS Interfaces" reported to BIOS via _OSI 1028 * 1029 * empty string disables _OSI 1030 * string starting with '!' disables that string 1031 * otherwise string is added to list, augmenting built-in strings 1032 */ 1033 int __init acpi_osi_setup(char *str) 1034 { 1035 if (str == NULL || *str == '\0') { 1036 printk(KERN_INFO PREFIX "_OSI method disabled\n"); 1037 acpi_gbl_create_osi_method = FALSE; 1038 } else if (!strcmp("!Linux", str)) { 1039 acpi_cmdline_osi_linux(0); /* !enable */ 1040 } else if (*str == '!') { 1041 if (acpi_osi_invalidate(++str) == AE_OK) 1042 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); 1043 } else if (!strcmp("Linux", str)) { 1044 acpi_cmdline_osi_linux(1); /* enable */ 1045 } else if (*osi_additional_string == '\0') { 1046 strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); 1047 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); 1048 } 1049 1050 return 1; 1051 } 1052 1053 __setup("acpi_osi=", acpi_osi_setup); 1054 1055 /* enable serialization to combat AE_ALREADY_EXISTS errors */ 1056 static int __init acpi_serialize_setup(char *str) 1057 { 1058 printk(KERN_INFO PREFIX "serialize enabled\n"); 1059 1060 acpi_gbl_all_methods_serialized = TRUE; 1061 1062 return 1; 1063 } 1064 1065 __setup("acpi_serialize", acpi_serialize_setup); 1066 1067 /* 1068 * Wake and Run-Time GPES are expected to be separate. 1069 * We disable wake-GPEs at run-time to prevent spurious 1070 * interrupts. 1071 * 1072 * However, if a system exists that shares Wake and 1073 * Run-time events on the same GPE this flag is available 1074 * to tell Linux to keep the wake-time GPEs enabled at run-time. 1075 */ 1076 static int __init acpi_wake_gpes_always_on_setup(char *str) 1077 { 1078 printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); 1079 1080 acpi_gbl_leave_wake_gpes_disabled = FALSE; 1081 1082 return 1; 1083 } 1084 1085 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); 1086 1087 /* Check of resource interference between native drivers and ACPI 1088 * OperationRegions (SystemIO and System Memory only). 1089 * IO ports and memory declared in ACPI might be used by the ACPI subsystem 1090 * in arbitrary AML code and can interfere with legacy drivers. 1091 * acpi_enforce_resources= can be set to: 1092 * 1093 * - strict (default) (2) 1094 * -> further driver trying to access the resources will not load 1095 * - lax (1) 1096 * -> further driver trying to access the resources will load, but you 1097 * get a system message that something might go wrong... 1098 * 1099 * - no (0) 1100 * -> ACPI Operation Region resources will not be registered 1101 * 1102 */ 1103 #define ENFORCE_RESOURCES_STRICT 2 1104 #define ENFORCE_RESOURCES_LAX 1 1105 #define ENFORCE_RESOURCES_NO 0 1106 1107 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1108 1109 static int __init acpi_enforce_resources_setup(char *str) 1110 { 1111 if (str == NULL || *str == '\0') 1112 return 0; 1113 1114 if (!strcmp("strict", str)) 1115 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1116 else if (!strcmp("lax", str)) 1117 acpi_enforce_resources = ENFORCE_RESOURCES_LAX; 1118 else if (!strcmp("no", str)) 1119 acpi_enforce_resources = ENFORCE_RESOURCES_NO; 1120 1121 return 1; 1122 } 1123 1124 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); 1125 1126 /* Check for resource conflicts between ACPI OperationRegions and native 1127 * drivers */ 1128 int acpi_check_resource_conflict(const struct resource *res) 1129 { 1130 struct acpi_res_list *res_list_elem; 1131 int ioport; 1132 int clash = 0; 1133 1134 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1135 return 0; 1136 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) 1137 return 0; 1138 1139 ioport = res->flags & IORESOURCE_IO; 1140 1141 spin_lock(&acpi_res_lock); 1142 list_for_each_entry(res_list_elem, &resource_list_head, 1143 resource_list) { 1144 if (ioport && (res_list_elem->resource_type 1145 != ACPI_ADR_SPACE_SYSTEM_IO)) 1146 continue; 1147 if (!ioport && (res_list_elem->resource_type 1148 != ACPI_ADR_SPACE_SYSTEM_MEMORY)) 1149 continue; 1150 1151 if (res->end < res_list_elem->start 1152 || res_list_elem->end < res->start) 1153 continue; 1154 clash = 1; 1155 break; 1156 } 1157 spin_unlock(&acpi_res_lock); 1158 1159 if (clash) { 1160 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { 1161 printk(KERN_WARNING "ACPI: resource %s %pR" 1162 " conflicts with ACPI region %s %pR\n", 1163 res->name, res, res_list_elem->name, 1164 res_list_elem); 1165 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) 1166 printk(KERN_NOTICE "ACPI: This conflict may" 1167 " cause random problems and system" 1168 " instability\n"); 1169 printk(KERN_INFO "ACPI: If an ACPI driver is available" 1170 " for this device, you should use it instead of" 1171 " the native driver\n"); 1172 } 1173 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) 1174 return -EBUSY; 1175 } 1176 return 0; 1177 } 1178 EXPORT_SYMBOL(acpi_check_resource_conflict); 1179 1180 int acpi_check_region(resource_size_t start, resource_size_t n, 1181 const char *name) 1182 { 1183 struct resource res = { 1184 .start = start, 1185 .end = start + n - 1, 1186 .name = name, 1187 .flags = IORESOURCE_IO, 1188 }; 1189 1190 return acpi_check_resource_conflict(&res); 1191 } 1192 EXPORT_SYMBOL(acpi_check_region); 1193 1194 int acpi_check_mem_region(resource_size_t start, resource_size_t n, 1195 const char *name) 1196 { 1197 struct resource res = { 1198 .start = start, 1199 .end = start + n - 1, 1200 .name = name, 1201 .flags = IORESOURCE_MEM, 1202 }; 1203 1204 return acpi_check_resource_conflict(&res); 1205 1206 } 1207 EXPORT_SYMBOL(acpi_check_mem_region); 1208 1209 /* 1210 * Let drivers know whether the resource checks are effective 1211 */ 1212 int acpi_resources_are_enforced(void) 1213 { 1214 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; 1215 } 1216 EXPORT_SYMBOL(acpi_resources_are_enforced); 1217 1218 /* 1219 * Acquire a spinlock. 1220 * 1221 * handle is a pointer to the spinlock_t. 1222 */ 1223 1224 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) 1225 { 1226 acpi_cpu_flags flags; 1227 spin_lock_irqsave(lockp, flags); 1228 return flags; 1229 } 1230 1231 /* 1232 * Release a spinlock. See above. 1233 */ 1234 1235 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) 1236 { 1237 spin_unlock_irqrestore(lockp, flags); 1238 } 1239 1240 #ifndef ACPI_USE_LOCAL_CACHE 1241 1242 /******************************************************************************* 1243 * 1244 * FUNCTION: acpi_os_create_cache 1245 * 1246 * PARAMETERS: name - Ascii name for the cache 1247 * size - Size of each cached object 1248 * depth - Maximum depth of the cache (in objects) <ignored> 1249 * cache - Where the new cache object is returned 1250 * 1251 * RETURN: status 1252 * 1253 * DESCRIPTION: Create a cache object 1254 * 1255 ******************************************************************************/ 1256 1257 acpi_status 1258 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) 1259 { 1260 *cache = kmem_cache_create(name, size, 0, 0, NULL); 1261 if (*cache == NULL) 1262 return AE_ERROR; 1263 else 1264 return AE_OK; 1265 } 1266 1267 /******************************************************************************* 1268 * 1269 * FUNCTION: acpi_os_purge_cache 1270 * 1271 * PARAMETERS: Cache - Handle to cache object 1272 * 1273 * RETURN: Status 1274 * 1275 * DESCRIPTION: Free all objects within the requested cache. 1276 * 1277 ******************************************************************************/ 1278 1279 acpi_status acpi_os_purge_cache(acpi_cache_t * cache) 1280 { 1281 kmem_cache_shrink(cache); 1282 return (AE_OK); 1283 } 1284 1285 /******************************************************************************* 1286 * 1287 * FUNCTION: acpi_os_delete_cache 1288 * 1289 * PARAMETERS: Cache - Handle to cache object 1290 * 1291 * RETURN: Status 1292 * 1293 * DESCRIPTION: Free all objects within the requested cache and delete the 1294 * cache object. 1295 * 1296 ******************************************************************************/ 1297 1298 acpi_status acpi_os_delete_cache(acpi_cache_t * cache) 1299 { 1300 kmem_cache_destroy(cache); 1301 return (AE_OK); 1302 } 1303 1304 /******************************************************************************* 1305 * 1306 * FUNCTION: acpi_os_release_object 1307 * 1308 * PARAMETERS: Cache - Handle to cache object 1309 * Object - The object to be released 1310 * 1311 * RETURN: None 1312 * 1313 * DESCRIPTION: Release an object to the specified cache. If cache is full, 1314 * the object is deleted. 1315 * 1316 ******************************************************************************/ 1317 1318 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) 1319 { 1320 kmem_cache_free(cache, object); 1321 return (AE_OK); 1322 } 1323 1324 /****************************************************************************** 1325 * 1326 * FUNCTION: acpi_os_validate_interface 1327 * 1328 * PARAMETERS: interface - Requested interface to be validated 1329 * 1330 * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise 1331 * 1332 * DESCRIPTION: Match an interface string to the interfaces supported by the 1333 * host. Strings originate from an AML call to the _OSI method. 1334 * 1335 *****************************************************************************/ 1336 1337 acpi_status 1338 acpi_os_validate_interface (char *interface) 1339 { 1340 if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) 1341 return AE_OK; 1342 if (!strcmp("Linux", interface)) { 1343 1344 printk(KERN_NOTICE PREFIX 1345 "BIOS _OSI(Linux) query %s%s\n", 1346 osi_linux.enable ? "honored" : "ignored", 1347 osi_linux.cmdline ? " via cmdline" : 1348 osi_linux.dmi ? " via DMI" : ""); 1349 1350 if (osi_linux.enable) 1351 return AE_OK; 1352 } 1353 return AE_SUPPORT; 1354 } 1355 1356 static inline int acpi_res_list_add(struct acpi_res_list *res) 1357 { 1358 struct acpi_res_list *res_list_elem; 1359 1360 list_for_each_entry(res_list_elem, &resource_list_head, 1361 resource_list) { 1362 1363 if (res->resource_type == res_list_elem->resource_type && 1364 res->start == res_list_elem->start && 1365 res->end == res_list_elem->end) { 1366 1367 /* 1368 * The Region(addr,len) already exist in the list, 1369 * just increase the count 1370 */ 1371 1372 res_list_elem->count++; 1373 return 0; 1374 } 1375 } 1376 1377 res->count = 1; 1378 list_add(&res->resource_list, &resource_list_head); 1379 return 1; 1380 } 1381 1382 static inline void acpi_res_list_del(struct acpi_res_list *res) 1383 { 1384 struct acpi_res_list *res_list_elem; 1385 1386 list_for_each_entry(res_list_elem, &resource_list_head, 1387 resource_list) { 1388 1389 if (res->resource_type == res_list_elem->resource_type && 1390 res->start == res_list_elem->start && 1391 res->end == res_list_elem->end) { 1392 1393 /* 1394 * If the res count is decreased to 0, 1395 * remove and free it 1396 */ 1397 1398 if (--res_list_elem->count == 0) { 1399 list_del(&res_list_elem->resource_list); 1400 kfree(res_list_elem); 1401 } 1402 return; 1403 } 1404 } 1405 } 1406 1407 acpi_status 1408 acpi_os_invalidate_address( 1409 u8 space_id, 1410 acpi_physical_address address, 1411 acpi_size length) 1412 { 1413 struct acpi_res_list res; 1414 1415 switch (space_id) { 1416 case ACPI_ADR_SPACE_SYSTEM_IO: 1417 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1418 /* Only interference checks against SystemIO and SystemMemory 1419 are needed */ 1420 res.start = address; 1421 res.end = address + length - 1; 1422 res.resource_type = space_id; 1423 spin_lock(&acpi_res_lock); 1424 acpi_res_list_del(&res); 1425 spin_unlock(&acpi_res_lock); 1426 break; 1427 case ACPI_ADR_SPACE_PCI_CONFIG: 1428 case ACPI_ADR_SPACE_EC: 1429 case ACPI_ADR_SPACE_SMBUS: 1430 case ACPI_ADR_SPACE_CMOS: 1431 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1432 case ACPI_ADR_SPACE_DATA_TABLE: 1433 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1434 break; 1435 } 1436 return AE_OK; 1437 } 1438 1439 /****************************************************************************** 1440 * 1441 * FUNCTION: acpi_os_validate_address 1442 * 1443 * PARAMETERS: space_id - ACPI space ID 1444 * address - Physical address 1445 * length - Address length 1446 * 1447 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, 1448 * should return AE_AML_ILLEGAL_ADDRESS. 1449 * 1450 * DESCRIPTION: Validate a system address via the host OS. Used to validate 1451 * the addresses accessed by AML operation regions. 1452 * 1453 *****************************************************************************/ 1454 1455 acpi_status 1456 acpi_os_validate_address ( 1457 u8 space_id, 1458 acpi_physical_address address, 1459 acpi_size length, 1460 char *name) 1461 { 1462 struct acpi_res_list *res; 1463 int added; 1464 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1465 return AE_OK; 1466 1467 switch (space_id) { 1468 case ACPI_ADR_SPACE_SYSTEM_IO: 1469 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1470 /* Only interference checks against SystemIO and SystemMemory 1471 are needed */ 1472 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); 1473 if (!res) 1474 return AE_OK; 1475 /* ACPI names are fixed to 4 bytes, still better use strlcpy */ 1476 strlcpy(res->name, name, 5); 1477 res->start = address; 1478 res->end = address + length - 1; 1479 res->resource_type = space_id; 1480 spin_lock(&acpi_res_lock); 1481 added = acpi_res_list_add(res); 1482 spin_unlock(&acpi_res_lock); 1483 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " 1484 "name: %s\n", added ? "Added" : "Already exist", 1485 (space_id == ACPI_ADR_SPACE_SYSTEM_IO) 1486 ? "SystemIO" : "System Memory", 1487 (unsigned long long)res->start, 1488 (unsigned long long)res->end, 1489 res->name); 1490 if (!added) 1491 kfree(res); 1492 break; 1493 case ACPI_ADR_SPACE_PCI_CONFIG: 1494 case ACPI_ADR_SPACE_EC: 1495 case ACPI_ADR_SPACE_SMBUS: 1496 case ACPI_ADR_SPACE_CMOS: 1497 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1498 case ACPI_ADR_SPACE_DATA_TABLE: 1499 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1500 break; 1501 } 1502 return AE_OK; 1503 } 1504 1505 #endif 1506