| /* |
| * 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> |
| * Copyright (c) 2008 Intel Corporation |
| * Author: Matthew Wilcox <willy@linux.intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * 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. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/highmem.h> |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/kmod.h> |
| #include <linux/delay.h> |
| #include <linux/workqueue.h> |
| #include <linux/nmi.h> |
| #include <linux/acpi.h> |
| #include <linux/efi.h> |
| #include <linux/ioport.h> |
| #include <linux/list.h> |
| #include <linux/jiffies.h> |
| #include <linux/semaphore.h> |
| |
| #include <asm/io.h> |
| #include <asm/uaccess.h> |
| |
| #include "internal.h" |
| |
| #define _COMPONENT ACPI_OS_SERVICES |
| ACPI_MODULE_NAME("osl"); |
| |
| struct acpi_os_dpc { |
| acpi_osd_exec_callback function; |
| void *context; |
| struct work_struct work; |
| }; |
| |
| #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]; |
| #endif /*ENABLE_DEBUGGER */ |
| |
| static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
| u32 pm1b_ctrl); |
| static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
| u32 val_b); |
| |
| static acpi_osd_handler acpi_irq_handler; |
| static void *acpi_irq_context; |
| static struct workqueue_struct *kacpid_wq; |
| static struct workqueue_struct *kacpi_notify_wq; |
| static struct workqueue_struct *kacpi_hotplug_wq; |
| |
| /* |
| * This list of permanent mappings is for memory that may be accessed from |
| * interrupt context, where we can't do the ioremap(). |
| */ |
| struct acpi_ioremap { |
| struct list_head list; |
| void __iomem *virt; |
| acpi_physical_address phys; |
| acpi_size size; |
| unsigned long refcount; |
| }; |
| |
| static LIST_HEAD(acpi_ioremaps); |
| static DEFINE_MUTEX(acpi_ioremap_lock); |
| |
| static void __init acpi_osi_setup_late(void); |
| |
| /* |
| * The story of _OSI(Linux) |
| * |
| * From pre-history through Linux-2.6.22, |
| * Linux responded TRUE upon a BIOS OSI(Linux) query. |
| * |
| * Unfortunately, reference BIOS writers got wind of this |
| * and put OSI(Linux) in their example code, quickly exposing |
| * this string as ill-conceived and opening the door to |
| * an un-bounded number of BIOS incompatibilities. |
| * |
| * For example, OSI(Linux) was used on resume to re-POST a |
| * video card on one system, because Linux at that time |
| * could not do a speedy restore in its native driver. |
| * But then upon gaining quick native restore capability, |
| * Linux has no way to tell the BIOS to skip the time-consuming |
| * POST -- putting Linux at a permanent performance disadvantage. |
| * On another system, the BIOS writer used OSI(Linux) |
| * to infer native OS support for IPMI! On other systems, |
| * OSI(Linux) simply got in the way of Linux claiming to |
| * be compatible with other operating systems, exposing |
| * BIOS issues such as skipped device initialization. |
| * |
| * So "Linux" turned out to be a really poor chose of |
| * OSI string, and from Linux-2.6.23 onward we respond FALSE. |
| * |
| * BIOS writers should NOT query _OSI(Linux) on future systems. |
| * Linux will complain on the console when it sees it, and return FALSE. |
| * To get Linux to return TRUE for your system will require |
| * a kernel source update to add a DMI entry, |
| * or boot with "acpi_osi=Linux" |
| */ |
| |
| static struct osi_linux { |
| unsigned int enable:1; |
| unsigned int dmi:1; |
| unsigned int cmdline:1; |
| unsigned int default_disabling:1; |
| } osi_linux = {0, 0, 0, 0}; |
| |
| static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
| { |
| if (!strcmp("Linux", interface)) { |
| |
| printk_once(KERN_NOTICE FW_BUG PREFIX |
| "BIOS _OSI(Linux) query %s%s\n", |
| osi_linux.enable ? "honored" : "ignored", |
| osi_linux.cmdline ? " via cmdline" : |
| osi_linux.dmi ? " via DMI" : ""); |
| } |
| |
| if (!strcmp("Darwin", interface)) { |
| /* |
| * Apple firmware will behave poorly if it receives positive |
| * answers to "Darwin" and any other OS. Respond positively |
| * to Darwin and then disable all other vendor strings. |
| */ |
| acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); |
| supported = ACPI_UINT32_MAX; |
| } |
| |
| return supported; |
| } |
| |
| static void __init acpi_request_region (struct acpi_generic_address *gas, |
| unsigned int length, char *desc) |
| { |
| u64 addr; |
| |
| /* Handle possible alignment issues */ |
| memcpy(&addr, &gas->address, sizeof(addr)); |
| if (!addr || !length) |
| return; |
| |
| acpi_reserve_region(addr, length, gas->space_id, 0, desc); |
| } |
| |
| static void __init acpi_reserve_resources(void) |
| { |
| acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
| "ACPI PM1a_EVT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
| "ACPI PM1b_EVT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
| "ACPI PM1a_CNT_BLK"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
| "ACPI PM1b_CNT_BLK"); |
| |
| if (acpi_gbl_FADT.pm_timer_length == 4) |
| acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); |
| |
| acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
| "ACPI PM2_CNT_BLK"); |
| |
| /* Length of GPE blocks must be a non-negative multiple of 2 */ |
| |
| 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"); |
| |
| 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"); |
| } |
| |
| void acpi_os_printf(const char *fmt, ...) |
| { |
| va_list args; |
| va_start(args, fmt); |
| acpi_os_vprintf(fmt, args); |
| va_end(args); |
| } |
| |
| void acpi_os_vprintf(const char *fmt, va_list args) |
| { |
| static char buffer[512]; |
| |
| vsprintf(buffer, fmt, args); |
| |
| #ifdef ENABLE_DEBUGGER |
| if (acpi_in_debugger) { |
| kdb_printf("%s", buffer); |
| } else { |
| printk(KERN_CONT "%s", buffer); |
| } |
| #else |
| printk(KERN_CONT "%s", buffer); |
| #endif |
| } |
| |
| #ifdef CONFIG_KEXEC |
| static unsigned long acpi_rsdp; |
| static int __init setup_acpi_rsdp(char *arg) |
| { |
| if (kstrtoul(arg, 16, &acpi_rsdp)) |
| return -EINVAL; |
| return 0; |
| } |
| early_param("acpi_rsdp", setup_acpi_rsdp); |
| #endif |
| |
| acpi_physical_address __init acpi_os_get_root_pointer(void) |
| { |
| #ifdef CONFIG_KEXEC |
| if (acpi_rsdp) |
| return acpi_rsdp; |
| #endif |
| |
| if (efi_enabled(EFI_CONFIG_TABLES)) { |
| if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
| return efi.acpi20; |
| else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
| return efi.acpi; |
| else { |
| printk(KERN_ERR PREFIX |
| "System description tables not found\n"); |
| return 0; |
| } |
| } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
| acpi_physical_address pa = 0; |
| |
| acpi_find_root_pointer(&pa); |
| return pa; |
| } |
| |
| return 0; |
| } |
| |
| /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| static struct acpi_ioremap * |
| acpi_map_lookup(acpi_physical_address phys, acpi_size size) |
| { |
| struct acpi_ioremap *map; |
| |
| list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| if (map->phys <= phys && |
| phys + size <= map->phys + map->size) |
| return map; |
| |
| return NULL; |
| } |
| |
| /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| static void __iomem * |
| acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) |
| { |
| struct acpi_ioremap *map; |
| |
| map = acpi_map_lookup(phys, size); |
| if (map) |
| return map->virt + (phys - map->phys); |
| |
| return NULL; |
| } |
| |
| void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
| { |
| struct acpi_ioremap *map; |
| void __iomem *virt = NULL; |
| |
| mutex_lock(&acpi_ioremap_lock); |
| map = acpi_map_lookup(phys, size); |
| if (map) { |
| virt = map->virt + (phys - map->phys); |
| map->refcount++; |
| } |
| mutex_unlock(&acpi_ioremap_lock); |
| return virt; |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_get_iomem); |
| |
| /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| static struct acpi_ioremap * |
| acpi_map_lookup_virt(void __iomem *virt, acpi_size size) |
| { |
| struct acpi_ioremap *map; |
| |
| list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| if (map->virt <= virt && |
| virt + size <= map->virt + map->size) |
| return map; |
| |
| return NULL; |
| } |
| |
| #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
| /* ioremap will take care of cache attributes */ |
| #define should_use_kmap(pfn) 0 |
| #else |
| #define should_use_kmap(pfn) page_is_ram(pfn) |
| #endif |
| |
| static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) |
| { |
| unsigned long pfn; |
| |
| pfn = pg_off >> PAGE_SHIFT; |
| if (should_use_kmap(pfn)) { |
| if (pg_sz > PAGE_SIZE) |
| return NULL; |
| return (void __iomem __force *)kmap(pfn_to_page(pfn)); |
| } else |
| return acpi_os_ioremap(pg_off, pg_sz); |
| } |
| |
| static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) |
| { |
| unsigned long pfn; |
| |
| pfn = pg_off >> PAGE_SHIFT; |
| if (should_use_kmap(pfn)) |
| kunmap(pfn_to_page(pfn)); |
| else |
| iounmap(vaddr); |
| } |
| |
| void __iomem *__init_refok |
| acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
| { |
| struct acpi_ioremap *map; |
| void __iomem *virt; |
| acpi_physical_address pg_off; |
| acpi_size pg_sz; |
| |
| if (phys > ULONG_MAX) { |
| printk(KERN_ERR PREFIX "Cannot map memory that high\n"); |
| return NULL; |
| } |
| |
| if (!acpi_gbl_permanent_mmap) |
| return __acpi_map_table((unsigned long)phys, size); |
| |
| mutex_lock(&acpi_ioremap_lock); |
| /* Check if there's a suitable mapping already. */ |
| map = acpi_map_lookup(phys, size); |
| if (map) { |
| map->refcount++; |
| goto out; |
| } |
| |
| map = kzalloc(sizeof(*map), GFP_KERNEL); |
| if (!map) { |
| mutex_unlock(&acpi_ioremap_lock); |
| return NULL; |
| } |
| |
| pg_off = round_down(phys, PAGE_SIZE); |
| pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; |
| virt = acpi_map(pg_off, pg_sz); |
| if (!virt) { |
| mutex_unlock(&acpi_ioremap_lock); |
| kfree(map); |
| return NULL; |
| } |
| |
| INIT_LIST_HEAD(&map->list); |
| map->virt = virt; |
| map->phys = pg_off; |
| map->size = pg_sz; |
| map->refcount = 1; |
| |
| list_add_tail_rcu(&map->list, &acpi_ioremaps); |
| |
| out: |
| mutex_unlock(&acpi_ioremap_lock); |
| return map->virt + (phys - map->phys); |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
| |
| void *__init_refok |
| acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
| { |
| return (void *)acpi_os_map_iomem(phys, size); |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
| |
| static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
| { |
| if (!--map->refcount) |
| list_del_rcu(&map->list); |
| } |
| |
| static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
| { |
| if (!map->refcount) { |
| synchronize_rcu_expedited(); |
| acpi_unmap(map->phys, map->virt); |
| kfree(map); |
| } |
| } |
| |
| void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
| { |
| struct acpi_ioremap *map; |
| |
| if (!acpi_gbl_permanent_mmap) { |
| __acpi_unmap_table(virt, size); |
| return; |
| } |
| |
| mutex_lock(&acpi_ioremap_lock); |
| map = acpi_map_lookup_virt(virt, size); |
| if (!map) { |
| mutex_unlock(&acpi_ioremap_lock); |
| WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
| return; |
| } |
| acpi_os_drop_map_ref(map); |
| mutex_unlock(&acpi_ioremap_lock); |
| |
| acpi_os_map_cleanup(map); |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
| |
| void __ref acpi_os_unmap_memory(void *virt, acpi_size size) |
| { |
| return acpi_os_unmap_iomem((void __iomem *)virt, size); |
| } |
| EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
| |
| void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| { |
| if (!acpi_gbl_permanent_mmap) |
| __acpi_unmap_table(virt, size); |
| } |
| |
| int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
| { |
| u64 addr; |
| void __iomem *virt; |
| |
| if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| return 0; |
| |
| /* Handle possible alignment issues */ |
| memcpy(&addr, &gas->address, sizeof(addr)); |
| if (!addr || !gas->bit_width) |
| return -EINVAL; |
| |
| virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
| if (!virt) |
| return -EIO; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(acpi_os_map_generic_address); |
| |
| void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
| { |
| u64 addr; |
| struct acpi_ioremap *map; |
| |
| if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| return; |
| |
| /* Handle possible alignment issues */ |
| memcpy(&addr, &gas->address, sizeof(addr)); |
| if (!addr || !gas->bit_width) |
| return; |
| |
| mutex_lock(&acpi_ioremap_lock); |
| map = acpi_map_lookup(addr, gas->bit_width / 8); |
| if (!map) { |
| mutex_unlock(&acpi_ioremap_lock); |
| return; |
| } |
| acpi_os_drop_map_ref(map); |
| mutex_unlock(&acpi_ioremap_lock); |
| |
| acpi_os_map_cleanup(map); |
| } |
| EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
| |
| #ifdef ACPI_FUTURE_USAGE |
| acpi_status |
| acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
| { |
| if (!phys || !virt) |
| return AE_BAD_PARAMETER; |
| |
| *phys = virt_to_phys(virt); |
| |
| return AE_OK; |
| } |
| #endif |
| |
| #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
| static bool acpi_rev_override; |
| |
| int __init acpi_rev_override_setup(char *str) |
| { |
| acpi_rev_override = true; |
| return 1; |
| } |
| __setup("acpi_rev_override", acpi_rev_override_setup); |
| #else |
| #define acpi_rev_override false |
| #endif |
| |
| #define ACPI_MAX_OVERRIDE_LEN 100 |
| |
| static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; |
| |
| acpi_status |
| acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
| char **new_val) |
| { |
| if (!init_val || !new_val) |
| return AE_BAD_PARAMETER; |
| |
| *new_val = NULL; |
| if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
| printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
| acpi_os_name); |
| *new_val = acpi_os_name; |
| } |
| |
| if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
| printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); |
| *new_val = (char *)5; |
| } |
| |
| return AE_OK; |
| } |
| |
| #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
| #include <linux/earlycpio.h> |
| #include <linux/memblock.h> |
| |
| static u64 acpi_tables_addr; |
| static int all_tables_size; |
| |
| /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ |
| static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
| { |
| u8 sum = 0; |
| u8 *end = buffer + length; |
| |
| while (buffer < end) |
| sum = (u8) (sum + *(buffer++)); |
| return sum; |
| } |
| |
| /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ |
| static const char * const table_sigs[] = { |
| ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, |
| ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, |
| ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, |
| ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, |
| ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, |
| ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, |
| ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, |
| ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, |
| ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; |
| |
| #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
| |
| #define ACPI_OVERRIDE_TABLES 64 |
| static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; |
| |
| #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) |
| |
| void __init acpi_initrd_override(void *data, size_t size) |
| { |
| int sig, no, table_nr = 0, total_offset = 0; |
| long offset = 0; |
| struct acpi_table_header *table; |
| char cpio_path[32] = "kernel/firmware/acpi/"; |
| struct cpio_data file; |
| |
| if (data == NULL || size == 0) |
| return; |
| |
| for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { |
| file = find_cpio_data(cpio_path, data, size, &offset); |
| if (!file.data) |
| break; |
| |
| data += offset; |
| size -= offset; |
| |
| if (file.size < sizeof(struct acpi_table_header)) { |
| pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", |
| cpio_path, file.name); |
| continue; |
| } |
| |
| table = file.data; |
| |
| for (sig = 0; table_sigs[sig]; sig++) |
| if (!memcmp(table->signature, table_sigs[sig], 4)) |
| break; |
| |
| if (!table_sigs[sig]) { |
| pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", |
| cpio_path, file.name); |
| continue; |
| } |
| if (file.size != table->length) { |
| pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", |
| cpio_path, file.name); |
| continue; |
| } |
| if (acpi_table_checksum(file.data, table->length)) { |
| pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", |
| cpio_path, file.name); |
| continue; |
| } |
| |
| pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", |
| table->signature, cpio_path, file.name, table->length); |
| |
| all_tables_size += table->length; |
| acpi_initrd_files[table_nr].data = file.data; |
| acpi_initrd_files[table_nr].size = file.size; |
| table_nr++; |
| } |
| if (table_nr == 0) |
| return; |
| |
| acpi_tables_addr = |
| memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, |
| all_tables_size, PAGE_SIZE); |
| if (!acpi_tables_addr) { |
| WARN_ON(1); |
| return; |
| } |
| /* |
| * Only calling e820_add_reserve does not work and the |
| * tables are invalid (memory got used) later. |
| * memblock_reserve works as expected and the tables won't get modified. |
| * But it's not enough on X86 because ioremap will |
| * complain later (used by acpi_os_map_memory) that the pages |
| * that should get mapped are not marked "reserved". |
| * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) |
| * works fine. |
| */ |
| memblock_reserve(acpi_tables_addr, all_tables_size); |
| arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
| |
| /* |
| * early_ioremap only can remap 256k one time. If we map all |
| * tables one time, we will hit the limit. Need to map chunks |
| * one by one during copying the same as that in relocate_initrd(). |
| */ |
| for (no = 0; no < table_nr; no++) { |
| unsigned char *src_p = acpi_initrd_files[no].data; |
| phys_addr_t size = acpi_initrd_files[no].size; |
| phys_addr_t dest_addr = acpi_tables_addr + total_offset; |
| phys_addr_t slop, clen; |
| char *dest_p; |
| |
| total_offset += size; |
| |
| while (size) { |
| slop = dest_addr & ~PAGE_MASK; |
| clen = size; |
| if (clen > MAP_CHUNK_SIZE - slop) |
| clen = MAP_CHUNK_SIZE - slop; |
| dest_p = early_ioremap(dest_addr & PAGE_MASK, |
| clen + slop); |
| memcpy(dest_p + slop, src_p, clen); |
| early_iounmap(dest_p, clen + slop); |
| src_p += clen; |
| dest_addr += clen; |
| size -= clen; |
| } |
| } |
| } |
| #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ |
| |
| static void acpi_table_taint(struct acpi_table_header *table) |
| { |
| pr_warn(PREFIX |
| "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", |
| table->signature, table->oem_table_id); |
| add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
| } |
| |
| |
| acpi_status |
| acpi_os_table_override(struct acpi_table_header * existing_table, |
| struct acpi_table_header ** new_table) |
| { |
| if (!existing_table || !new_table) |
| return AE_BAD_PARAMETER; |
| |
| *new_table = NULL; |
| |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| if (strncmp(existing_table->signature, "DSDT", 4) == 0) |
| *new_table = (struct acpi_table_header *)AmlCode; |
| #endif |
| if (*new_table != NULL) |
| acpi_table_taint(existing_table); |
| return AE_OK; |
| } |
| |
| acpi_status |
| acpi_os_physical_table_override(struct acpi_table_header *existing_table, |
| acpi_physical_address *address, |
| u32 *table_length) |
| { |
| #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
| *table_length = 0; |
| *address = 0; |
| return AE_OK; |
| #else |
| int table_offset = 0; |
| struct acpi_table_header *table; |
| |
| *table_length = 0; |
| *address = 0; |
| |
| if (!acpi_tables_addr) |
| return AE_OK; |
| |
| do { |
| if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { |
| WARN_ON(1); |
| return AE_OK; |
| } |
| |
| table = acpi_os_map_memory(acpi_tables_addr + table_offset, |
| ACPI_HEADER_SIZE); |
| |
| if (table_offset + table->length > all_tables_size) { |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| WARN_ON(1); |
| return AE_OK; |
| } |
| |
| table_offset += table->length; |
| |
| if (memcmp(existing_table->signature, table->signature, 4)) { |
| acpi_os_unmap_memory(table, |
| ACPI_HEADER_SIZE); |
| continue; |
| } |
| |
| /* Only override tables with matching oem id */ |
| if (memcmp(table->oem_table_id, existing_table->oem_table_id, |
| ACPI_OEM_TABLE_ID_SIZE)) { |
| acpi_os_unmap_memory(table, |
| ACPI_HEADER_SIZE); |
| continue; |
| } |
| |
| table_offset -= table->length; |
| *table_length = table->length; |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| *address = acpi_tables_addr + table_offset; |
| break; |
| } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); |
| |
| if (*address != 0) |
| acpi_table_taint(existing_table); |
| return AE_OK; |
| #endif |
| } |
| |
| static irqreturn_t acpi_irq(int irq, void *dev_id) |
| { |
| u32 handled; |
| |
| handled = (*acpi_irq_handler) (acpi_irq_context); |
| |
| if (handled) { |
| acpi_irq_handled++; |
| return IRQ_HANDLED; |
| } else { |
| acpi_irq_not_handled++; |
| return IRQ_NONE; |
| } |
| } |
| |
| acpi_status |
| acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
| void *context) |
| { |
| unsigned int irq; |
| |
| acpi_irq_stats_init(); |
| |
| /* |
| * ACPI interrupts different from the SCI in our copy of the FADT are |
| * not supported. |
| */ |
| if (gsi != acpi_gbl_FADT.sci_interrupt) |
| return AE_BAD_PARAMETER; |
| |
| if (acpi_irq_handler) |
| return AE_ALREADY_ACQUIRED; |
| |
| 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; |
| if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
| printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
| acpi_irq_handler = NULL; |
| return AE_NOT_ACQUIRED; |
| } |
| |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
| { |
| if (irq != acpi_gbl_FADT.sci_interrupt) |
| return AE_BAD_PARAMETER; |
| |
| free_irq(irq, acpi_irq); |
| acpi_irq_handler = NULL; |
| |
| return AE_OK; |
| } |
| |
| /* |
| * Running in interpreter thread context, safe to sleep |
| */ |
| |
| void acpi_os_sleep(u64 ms) |
| { |
| msleep(ms); |
| } |
| |
| void acpi_os_stall(u32 us) |
| { |
| while (us) { |
| u32 delay = 1000; |
| |
| if (delay > us) |
| delay = us; |
| udelay(delay); |
| touch_nmi_watchdog(); |
| us -= delay; |
| } |
| } |
| |
| /* |
| * Support ACPI 3.0 AML Timer operand |
| * Returns 64-bit free-running, monotonically increasing timer |
| * with 100ns granularity |
| */ |
| u64 acpi_os_get_timer(void) |
| { |
| u64 time_ns = ktime_to_ns(ktime_get()); |
| do_div(time_ns, 100); |
| return time_ns; |
| } |
| |
| acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
| { |
| u32 dummy; |
| |
| if (!value) |
| value = &dummy; |
| |
| *value = 0; |
| if (width <= 8) { |
| *(u8 *) value = inb(port); |
| } else if (width <= 16) { |
| *(u16 *) value = inw(port); |
| } else if (width <= 32) { |
| *(u32 *) value = inl(port); |
| } else { |
| BUG(); |
| } |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_read_port); |
| |
| acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
| { |
| if (width <= 8) { |
| outb(value, port); |
| } else if (width <= 16) { |
| outw(value, port); |
| } else if (width <= 32) { |
| outl(value, port); |
| } else { |
| BUG(); |
| } |
| |
| return AE_OK; |
| } |
| |
| EXPORT_SYMBOL(acpi_os_write_port); |
| |
| #ifdef readq |
| static inline u64 read64(const volatile void __iomem *addr) |
| { |
| return readq(addr); |
| } |
| #else |
| static inline u64 read64(const volatile void __iomem *addr) |
| { |
| u64 l, h; |
| l = readl(addr); |
| h = readl(addr+4); |
| return l | (h << 32); |
| } |
| #endif |
| |
| acpi_status |
| acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
| { |
| void __iomem *virt_addr; |
| unsigned int size = width / 8; |
| bool unmap = false; |
| u64 dummy; |
| |
| rcu_read_lock(); |
| virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| if (!virt_addr) { |
| rcu_read_unlock(); |
| virt_addr = acpi_os_ioremap(phys_addr, size); |
| if (!virt_addr) |
| return AE_BAD_ADDRESS; |
| unmap = true; |
| } |
| |
| if (!value) |
| value = &dummy; |
| |
| switch (width) { |
| case 8: |
| *(u8 *) value = readb(virt_addr); |
| break; |
| case 16: |
| *(u16 *) value = readw(virt_addr); |
| break; |
| case 32: |
| *(u32 *) value = readl(virt_addr); |
| break; |
| case 64: |
| *(u64 *) value = read64(virt_addr); |
| break; |
| default: |
| BUG(); |
| } |
| |
| if (unmap) |
| iounmap(virt_addr); |
| else |
| rcu_read_unlock(); |
| |
| return AE_OK; |
| } |
| |
| #ifdef writeq |
| static inline void write64(u64 val, volatile void __iomem *addr) |
| { |
| writeq(val, addr); |
| } |
| #else |
| static inline void write64(u64 val, volatile void __iomem *addr) |
| { |
| writel(val, addr); |
| writel(val>>32, addr+4); |
| } |
| #endif |
| |
| acpi_status |
| acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
| { |
| void __iomem *virt_addr; |
| unsigned int size = width / 8; |
| bool unmap = false; |
| |
| rcu_read_lock(); |
| virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| if (!virt_addr) { |
| rcu_read_unlock(); |
| virt_addr = acpi_os_ioremap(phys_addr, size); |
| if (!virt_addr) |
| return AE_BAD_ADDRESS; |
| unmap = true; |
| } |
| |
| switch (width) { |
| case 8: |
| writeb(value, virt_addr); |
| break; |
| case 16: |
| writew(value, virt_addr); |
| break; |
| case 32: |
| writel(value, virt_addr); |
| break; |
| case 64: |
| write64(value, virt_addr); |
| break; |
| default: |
| BUG(); |
| } |
| |
| if (unmap) |
| iounmap(virt_addr); |
| else |
| rcu_read_unlock(); |
| |
| return AE_OK; |
| } |
| |
| acpi_status |
| acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| u64 *value, u32 width) |
| { |
| int result, size; |
| u32 value32; |
| |
| 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; |
| } |
| |
| result = raw_pci_read(pci_id->segment, pci_id->bus, |
| PCI_DEVFN(pci_id->device, pci_id->function), |
| reg, size, &value32); |
| *value = value32; |
| |
| return (result ? AE_ERROR : AE_OK); |
| } |
| |
| acpi_status |
| acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| u64 value, u32 width) |
| { |
| int result, size; |
| |
| switch (width) { |
| case 8: |
| size = 1; |
| break; |
| case 16: |
| size = 2; |
| break; |
| case 32: |
| size = 4; |
| break; |
| default: |
| return AE_ERROR; |
| } |
| |
| result = raw_pci_write(pci_id->segment, pci_id->bus, |
| PCI_DEVFN(pci_id->device, pci_id->function), |
| reg, size, value); |
| |
| return (result ? AE_ERROR : AE_OK); |
| } |
| |
| static void acpi_os_execute_deferred(struct work_struct *work) |
| { |
| struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); |
| |
| dpc->function(dpc->context); |
| kfree(dpc); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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, |
| acpi_osd_exec_callback function, void *context) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_os_dpc *dpc; |
| struct workqueue_struct *queue; |
| int ret; |
| ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| "Scheduling function [%p(%p)] for deferred execution.\n", |
| function, context)); |
| |
| /* |
| * Allocate/initialize DPC structure. Note that this memory will be |
| * freed by the callee. The kernel handles the work_struct list in a |
| * 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 |
| * having a static work_struct. |
| */ |
| |
| dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
| if (!dpc) |
| return AE_NO_MEMORY; |
| |
| dpc->function = function; |
| dpc->context = context; |
| |
| /* |
| * To prevent lockdep from complaining unnecessarily, make sure that |
| * there is a different static lockdep key for each workqueue by using |
| * INIT_WORK() for each of them separately. |
| */ |
| if (type == OSL_NOTIFY_HANDLER) { |
| queue = kacpi_notify_wq; |
| INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| } else { |
| queue = kacpid_wq; |
| INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| } |
| |
| /* |
| * On some machines, a software-initiated SMI causes corruption unless |
| * the SMI runs on CPU 0. An SMI can be initiated by any AML, but |
| * typically it's done in GPE-related methods that are run via |
| * workqueues, so we can avoid the known corruption cases by always |
| * queueing on CPU 0. |
| */ |
| ret = queue_work_on(0, queue, &dpc->work); |
| |
| if (!ret) { |
| printk(KERN_ERR PREFIX |
| "Call to queue_work() failed.\n"); |
| status = AE_ERROR; |
| kfree(dpc); |
| } |
| return status; |
| } |
| EXPORT_SYMBOL(acpi_os_execute); |
| |
| void acpi_os_wait_events_complete(void) |
| { |
| /* |
| * Make sure the GPE handler or the fixed event handler is not used |
| * on another CPU after removal. |
| */ |
| if (acpi_irq_handler) |
| synchronize_hardirq(acpi_gbl_FADT.sci_interrupt); |
| flush_workqueue(kacpid_wq); |
| flush_workqueue(kacpi_notify_wq); |
| } |
| |
| struct acpi_hp_work { |
| struct work_struct work; |
| struct acpi_device *adev; |
| u32 src; |
| }; |
| |
| static void acpi_hotplug_work_fn(struct work_struct *work) |
| { |
| struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
| |
| acpi_os_wait_events_complete(); |
| acpi_device_hotplug(hpw->adev, hpw->src); |
| kfree(hpw); |
| } |
| |
| acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
| { |
| struct acpi_hp_work *hpw; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
| adev, src)); |
| |
| hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); |
| if (!hpw) |
| return AE_NO_MEMORY; |
| |
| INIT_WORK(&hpw->work, acpi_hotplug_work_fn); |
| hpw->adev = adev; |
| hpw->src = src; |
| /* |
| * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because |
| * the hotplug code may call driver .remove() functions, which may |
| * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush |
| * these workqueues. |
| */ |
| if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { |
| kfree(hpw); |
| return AE_ERROR; |
| } |
| return AE_OK; |
| } |
| |
| bool acpi_queue_hotplug_work(struct work_struct *work) |
| { |
| return queue_work(kacpi_hotplug_wq, work); |
| } |
| |
| acpi_status |
| acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
| { |
| struct semaphore *sem = NULL; |
| |
| sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
| if (!sem) |
| return AE_NO_MEMORY; |
| |
| sema_init(sem, initial_units); |
| |
| *handle = (acpi_handle *) sem; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
| *handle, initial_units)); |
| |
| return AE_OK; |
| } |
| |
| /* |
| * 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? |
| */ |
| |
| acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
| { |
| struct semaphore *sem = (struct semaphore *)handle; |
| |
| if (!sem) |
| return AE_BAD_PARAMETER; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
| |
| BUG_ON(!list_empty(&sem->wait_list)); |
| kfree(sem); |
| sem = NULL; |
| |
| return AE_OK; |
| } |
| |
| /* |
| * TODO: Support for units > 1? |
| */ |
| acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
| { |
| acpi_status status = AE_OK; |
| struct semaphore *sem = (struct semaphore *)handle; |
| long jiffies; |
| int ret = 0; |
| |
| if (!sem || (units < 1)) |
| return AE_BAD_PARAMETER; |
| |
| if (units > 1) |
| return AE_SUPPORT; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
| handle, units, timeout)); |
| |
| 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; |
| |
| if (ACPI_FAILURE(status)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| "Failed to acquire semaphore[%p|%d|%d], %s", |
| handle, units, timeout, |
| acpi_format_exception(status))); |
| } else { |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| "Acquired semaphore[%p|%d|%d]", handle, |
| units, timeout)); |
| } |
| |
| return status; |
| } |
| |
| /* |
| * TODO: Support for units > 1? |
| */ |
| acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
| { |
| struct semaphore *sem = (struct semaphore *)handle; |
| |
| if (!sem || (units < 1)) |
| return AE_BAD_PARAMETER; |
| |
| if (units > 1) |
| return AE_SUPPORT; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
| units)); |
| |
| up(sem); |
| |
| return AE_OK; |
| } |
| |
| #ifdef ACPI_FUTURE_USAGE |
| u32 acpi_os_get_line(char *buffer) |
| { |
| |
| #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; |
| } |
| #endif /* ACPI_FUTURE_USAGE */ |
| |
| acpi_status acpi_os_signal(u32 function, void *info) |
| { |
| switch (function) { |
| 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; |
| } |
| |
| static int __init acpi_os_name_setup(char *str) |
| { |
| char *p = acpi_os_name; |
| int count = ACPI_MAX_OVERRIDE_LEN - 1; |
| |
| if (!str || !*str) |
| return 0; |
| |
| for (; count-- && *str; str++) { |
| if (isalnum(*str) || *str == ' ' || *str == ':') |
| *p++ = *str; |
| else if (*str == '\'' || *str == '"') |
| continue; |
| else |
| break; |
| } |
| *p = 0; |
| |
| return 1; |
| |
| } |
| |
| __setup("acpi_os_name=", acpi_os_name_setup); |
| |
| #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
| #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ |
| |
| struct osi_setup_entry { |
| char string[OSI_STRING_LENGTH_MAX]; |
| bool enable; |
| }; |
| |
| static struct osi_setup_entry |
| osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { |
| {"Module Device", true}, |
| {"Processor Device", true}, |
| {"3.0 _SCP Extensions", true}, |
| {"Processor Aggregator Device", true}, |
| }; |
| |
| void __init acpi_osi_setup(char *str) |
| { |
| struct osi_setup_entry *osi; |
| bool enable = true; |
| int i; |
| |
| if (!acpi_gbl_create_osi_method) |
| return; |
| |
| if (str == NULL || *str == '\0') { |
| printk(KERN_INFO PREFIX "_OSI method disabled\n"); |
| acpi_gbl_create_osi_method = FALSE; |
| return; |
| } |
| |
| if (*str == '!') { |
| str++; |
| if (*str == '\0') { |
| osi_linux.default_disabling = 1; |
| return; |
| } else if (*str == '*') { |
| acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); |
| for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| osi = &osi_setup_entries[i]; |
| osi->enable = false; |
| } |
| return; |
| } |
| enable = false; |
| } |
| |
| for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| osi = &osi_setup_entries[i]; |
| if (!strcmp(osi->string, str)) { |
| osi->enable = enable; |
| break; |
| } else if (osi->string[0] == '\0') { |
| osi->enable = enable; |
| strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); |
| break; |
| } |
| } |
| } |
| |
| static void __init set_osi_linux(unsigned int enable) |
| { |
| if (osi_linux.enable != enable) |
| osi_linux.enable = enable; |
| |
| if (osi_linux.enable) |
| acpi_osi_setup("Linux"); |
| else |
| acpi_osi_setup("!Linux"); |
| |
| return; |
| } |
| |
| static void __init acpi_cmdline_osi_linux(unsigned int enable) |
| { |
| osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
| osi_linux.dmi = 0; |
| set_osi_linux(enable); |
| |
| return; |
| } |
| |
| void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) |
| { |
| printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
| |
| if (enable == -1) |
| return; |
| |
| osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
| set_osi_linux(enable); |
| |
| return; |
| } |
| |
| /* |
| * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
| * |
| * empty string disables _OSI |
| * string starting with '!' disables that string |
| * otherwise string is added to list, augmenting built-in strings |
| */ |
| static void __init acpi_osi_setup_late(void) |
| { |
| struct osi_setup_entry *osi; |
| char *str; |
| int i; |
| acpi_status status; |
| |
| if (osi_linux.default_disabling) { |
| status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); |
| |
| if (ACPI_SUCCESS(status)) |
| printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); |
| } |
| |
| for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| osi = &osi_setup_entries[i]; |
| str = osi->string; |
| |
| if (*str == '\0') |
| break; |
| if (osi->enable) { |
| status = acpi_install_interface(str); |
| |
| if (ACPI_SUCCESS(status)) |
| printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); |
| } else { |
| status = acpi_remove_interface(str); |
| |
| if (ACPI_SUCCESS(status)) |
| printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); |
| } |
| } |
| } |
| |
| static int __init osi_setup(char *str) |
| { |
| if (str && !strcmp("Linux", str)) |
| acpi_cmdline_osi_linux(1); |
| else if (str && !strcmp("!Linux", str)) |
| acpi_cmdline_osi_linux(0); |
| else |
| acpi_osi_setup(str); |
| |
| return 1; |
| } |
| |
| __setup("acpi_osi=", osi_setup); |
| |
| /* |
| * Disable the auto-serialization of named objects creation methods. |
| * |
| * This feature is enabled by default. It marks the AML control methods |
| * that contain the opcodes to create named objects as "Serialized". |
| */ |
| static int __init acpi_no_auto_serialize_setup(char *str) |
| { |
| acpi_gbl_auto_serialize_methods = FALSE; |
| pr_info("ACPI: auto-serialization disabled\n"); |
| |
| return 1; |
| } |
| |
| __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
| |
| /* 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 (default) (2) |
| * -> further driver trying to access the resources will not load |
| * - lax (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_STRICT; |
| |
| 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 */ |
| int acpi_check_resource_conflict(const struct resource *res) |
| { |
| acpi_adr_space_type space_id; |
| acpi_size length; |
| u8 warn = 0; |
| int clash = 0; |
| |
| if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
| return 0; |
| if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) |
| return 0; |
| |
| if (res->flags & IORESOURCE_IO) |
| space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| else |
| space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; |
| |
| length = resource_size(res); |
| if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
| warn = 1; |
| clash = acpi_check_address_range(space_id, res->start, length, warn); |
| |
| if (clash) { |
| if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { |
| if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
| printk(KERN_NOTICE "ACPI: This conflict may" |
| " cause random problems and system" |
| " instability\n"); |
| printk(KERN_INFO "ACPI: If an ACPI driver is available" |
| " for this device, you should use it instead of" |
| " the native driver\n"); |
| } |
| if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) |
| return -EBUSY; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(acpi_check_resource_conflict); |
| |
| 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); |
| |
| /* |
| * Let drivers know whether the resource checks are effective |
| */ |
| int acpi_resources_are_enforced(void) |
| { |
| return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; |
| } |
| EXPORT_SYMBOL(acpi_resources_are_enforced); |
| |
| bool acpi_osi_is_win8(void) |
| { |
| return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; |
| } |
| EXPORT_SYMBOL(acpi_osi_is_win8); |
| |
| /* |
| * Deallocate the memory for a spinlock. |
| */ |
| void acpi_os_delete_lock(acpi_spinlock handle) |
| { |
| ACPI_FREE(handle); |
| } |
| |
| /* |
| * Acquire a spinlock. |
| * |
| * handle is a pointer to the spinlock_t. |
| */ |
| |
| acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
| { |
| acpi_cpu_flags flags; |
| spin_lock_irqsave(lockp, flags); |
| return flags; |
| } |
| |
| /* |
| * Release a spinlock. See above. |
| */ |
| |
| void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
| { |
| spin_unlock_irqrestore(lockp, flags); |
| } |
| |
| #ifndef ACPI_USE_LOCAL_CACHE |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_os_create_cache |
| * |
| * 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 |
| * |
| * RETURN: status |
| * |
| * DESCRIPTION: Create a cache object |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
| { |
| *cache = kmem_cache_create(name, size, 0, 0, NULL); |
| if (*cache == NULL) |
| return AE_ERROR; |
| else |
| return AE_OK; |
| } |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_os_purge_cache |
| * |
| * PARAMETERS: Cache - Handle to cache object |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Free all objects within the requested cache. |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
| { |
| kmem_cache_shrink(cache); |
| return (AE_OK); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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. |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
| { |
| kmem_cache_destroy(cache); |
| return (AE_OK); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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. |
| * |
| ******************************************************************************/ |
| |
| acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
| { |
| kmem_cache_free(cache, object); |
| return (AE_OK); |
| } |
| #endif |
| |
| static int __init acpi_no_static_ssdt_setup(char *s) |
| { |
| acpi_gbl_disable_ssdt_table_install = TRUE; |
| pr_info("ACPI: static SSDT installation disabled\n"); |
| |
| return 0; |
| } |
| |
| early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
| |
| static int __init acpi_disable_return_repair(char *s) |
| { |
| printk(KERN_NOTICE PREFIX |
| "ACPI: Predefined validation mechanism disabled\n"); |
| acpi_gbl_disable_auto_repair = TRUE; |
| |
| return 1; |
| } |
| |
| __setup("acpica_no_return_repair", acpi_disable_return_repair); |
| |
| acpi_status __init acpi_os_initialize(void) |
| { |
| acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
| /* |
| * Use acpi_os_map_generic_address to pre-map the reset |
| * register if it's in system memory. |
| */ |
| int rv; |
| |
| rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); |
| pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); |
| } |
| |
| return AE_OK; |
| } |
| |
| acpi_status __init acpi_os_initialize1(void) |
| { |
| acpi_reserve_resources(); |
| kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
| kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); |
| kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
| BUG_ON(!kacpid_wq); |
| BUG_ON(!kacpi_notify_wq); |
| BUG_ON(!kacpi_hotplug_wq); |
| acpi_install_interface_handler(acpi_osi_handler); |
| acpi_osi_setup_late(); |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_terminate(void) |
| { |
| if (acpi_irq_handler) { |
| acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
| acpi_irq_handler); |
| } |
| |
| acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
| acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); |
| |
| destroy_workqueue(kacpid_wq); |
| destroy_workqueue(kacpi_notify_wq); |
| destroy_workqueue(kacpi_hotplug_wq); |
| |
| return AE_OK; |
| } |
| |
| acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, |
| u32 pm1b_control) |
| { |
| int rc = 0; |
| if (__acpi_os_prepare_sleep) |
| rc = __acpi_os_prepare_sleep(sleep_state, |
| pm1a_control, pm1b_control); |
| if (rc < 0) |
| return AE_ERROR; |
| else if (rc > 0) |
| return AE_CTRL_SKIP; |
| |
| return AE_OK; |
| } |
| |
| void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, |
| u32 pm1a_ctrl, u32 pm1b_ctrl)) |
| { |
| __acpi_os_prepare_sleep = func; |
| } |
| |
| acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
| u32 val_b) |
| { |
| int rc = 0; |
| if (__acpi_os_prepare_extended_sleep) |
| rc = __acpi_os_prepare_extended_sleep(sleep_state, |
| val_a, val_b); |
| if (rc < 0) |
| return AE_ERROR; |
| else if (rc > 0) |
| return AE_CTRL_SKIP; |
| |
| return AE_OK; |
| } |
| |
| void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, |
| u32 val_a, u32 val_b)) |
| { |
| __acpi_os_prepare_extended_sleep = func; |
| } |