// SPDX-License-Identifier: GPL-2.0-or-later /* * acpi_osl.c - OS-dependent functions ($Revision: 83 $) * * Copyright (C) 2000 Andrew Henroid * Copyright (C) 2001, 2002 Andy Grover <[email protected]> * Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]> * Copyright (c) 2008 Intel Corporation * Author: Matthew Wilcox <[email protected]> */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/highmem.h> #include <linux/lockdep.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 <linux/security.h> #include <asm/io.h> #include <linux/uaccess.h> #include <linux/io-64-nonatomic-lo-hi.h> #include "acpica/accommon.h" #include "internal.h" /* Definitions for ACPI_DEBUG_PRINT() */ #define _COMPONENT … ACPI_MODULE_NAME("osl"); struct acpi_os_dpc { … }; #ifdef ENABLE_DEBUGGER #include <linux/kdb.h> /* stuff for debugger support */ int acpi_in_debugger; EXPORT_SYMBOL(acpi_in_debugger); #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; static bool acpi_os_initialized; unsigned int acpi_sci_irq = …; bool acpi_permanent_mmap = …; /* * 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 { … }; static LIST_HEAD(acpi_ioremaps); static DEFINE_MUTEX(acpi_ioremap_lock); #define acpi_ioremap_lock_held() … static void __init acpi_request_region (struct acpi_generic_address *gas, unsigned int length, char *desc) { … } static int __init acpi_reserve_resources(void) { … } fs_initcall_sync(acpi_reserve_resources); void acpi_os_printf(const char *fmt, ...) { … } EXPORT_SYMBOL(…); void __printf(1, 0) acpi_os_vprintf(const char *fmt, va_list args) { … } #ifdef CONFIG_KEXEC static unsigned long acpi_rsdp; static int __init setup_acpi_rsdp(char *arg) { … } early_param(…); #endif acpi_physical_address __init acpi_os_get_root_pointer(void) { … } /* 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) { … } /* 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) { … } void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) { … } EXPORT_SYMBOL_GPL(…); /* 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) { … } #if defined(CONFIG_ARM64) || defined(CONFIG_RISCV) /* ioremap will take care of cache attributes */ #define should_use_kmap … #else #define should_use_kmap(pfn) … #endif static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) { … } static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) { … } /** * acpi_os_map_iomem - Get a virtual address for a given physical address range. * @phys: Start of the physical address range to map. * @size: Size of the physical address range to map. * * Look up the given physical address range in the list of existing ACPI memory * mappings. If found, get a reference to it and return a pointer to it (its * virtual address). If not found, map it, add it to that list and return a * pointer to it. * * During early init (when acpi_permanent_mmap has not been set yet) this * routine simply calls __acpi_map_table() to get the job done. */ void __iomem __ref *acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) { … } EXPORT_SYMBOL_GPL(…); void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) { … } EXPORT_SYMBOL_GPL(…); static void acpi_os_map_remove(struct work_struct *work) { … } /* Must be called with mutex_lock(&acpi_ioremap_lock) */ static void acpi_os_drop_map_ref(struct acpi_ioremap *map) { … } /** * acpi_os_unmap_iomem - Drop a memory mapping reference. * @virt: Start of the address range to drop a reference to. * @size: Size of the address range to drop a reference to. * * Look up the given virtual address range in the list of existing ACPI memory * mappings, drop a reference to it and if there are no more active references * to it, queue it up for later removal. * * During early init (when acpi_permanent_mmap has not been set yet) this * routine simply calls __acpi_unmap_table() to get the job done. Since * __acpi_unmap_table() is an __init function, the __ref annotation is needed * here. */ void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) { … } EXPORT_SYMBOL_GPL(…); /** * acpi_os_unmap_memory - Drop a memory mapping reference. * @virt: Start of the address range to drop a reference to. * @size: Size of the address range to drop a reference to. */ void __ref acpi_os_unmap_memory(void *virt, acpi_size size) { … } EXPORT_SYMBOL_GPL(…); void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *gas) { … } EXPORT_SYMBOL(…); void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) { … } EXPORT_SYMBOL(…); #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) { … } __setup(…); #else #define acpi_rev_override … #endif #define ACPI_MAX_OVERRIDE_LEN … static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; acpi_status acpi_os_predefined_override(const struct acpi_predefined_names *init_val, acpi_string *new_val) { … } static irqreturn_t acpi_irq(int irq, void *dev_id) { … } acpi_status acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, void *context) { … } acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) { … } /* * Running in interpreter thread context, safe to sleep */ void acpi_os_sleep(u64 ms) { … } void acpi_os_stall(u32 us) { … } /* * Support ACPI 3.0 AML Timer operand. Returns a 64-bit free-running, * monotonically increasing timer with 100ns granularity. Do not use * ktime_get() to implement this function because this function may get * called after timekeeping has been suspended. Note: calling this function * after timekeeping has been suspended may lead to unexpected results * because when timekeeping is suspended the jiffies counter is not * incremented. See also timekeeping_suspend(). */ u64 acpi_os_get_timer(void) { … } acpi_status acpi_os_read_port(acpi_io_address port, u32 *value, u32 width) { … } EXPORT_SYMBOL(…); acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) { … } EXPORT_SYMBOL(…); int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width) { … } acpi_status acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) { … } acpi_status acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) { … } #ifdef CONFIG_PCI acpi_status acpi_os_read_pci_configuration(struct acpi_pci_id *pci_id, u32 reg, u64 *value, u32 width) { … } acpi_status acpi_os_write_pci_configuration(struct acpi_pci_id *pci_id, u32 reg, u64 value, u32 width) { … } #endif static void acpi_os_execute_deferred(struct work_struct *work) { … } #ifdef CONFIG_ACPI_DEBUGGER static struct acpi_debugger acpi_debugger; static bool acpi_debugger_initialized; int acpi_register_debugger(struct module *owner, const struct acpi_debugger_ops *ops) { … } EXPORT_SYMBOL(…); void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) { … } EXPORT_SYMBOL(…); int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) { … } ssize_t acpi_debugger_write_log(const char *msg) { … } ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) { … } int acpi_debugger_wait_command_ready(void) { … } int acpi_debugger_notify_command_complete(void) { … } int __init acpi_debugger_init(void) { … } #endif /******************************************************************************* * * 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) { … } EXPORT_SYMBOL(…); void acpi_os_wait_events_complete(void) { … } EXPORT_SYMBOL(…); struct acpi_hp_work { … }; static void acpi_hotplug_work_fn(struct work_struct *work) { … } acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) { … } bool acpi_queue_hotplug_work(struct work_struct *work) { … } acpi_status acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle *handle) { … } /* * 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) { … } /* * TODO: Support for units > 1? */ acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) { … } /* * TODO: Support for units > 1? */ acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) { … } acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) { … } EXPORT_SYMBOL(…); acpi_status acpi_os_wait_command_ready(void) { … } acpi_status acpi_os_notify_command_complete(void) { … } acpi_status acpi_os_signal(u32 function, void *info) { … } static int __init acpi_os_name_setup(char *str) { … } __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) { … } __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 … #define ENFORCE_RESOURCES_LAX … #define ENFORCE_RESOURCES_NO … static unsigned int acpi_enforce_resources = …; static int __init acpi_enforce_resources_setup(char *str) { … } __setup(…); /* Check for resource conflicts between ACPI OperationRegions and native * drivers */ int acpi_check_resource_conflict(const struct resource *res) { … } EXPORT_SYMBOL(…); int acpi_check_region(resource_size_t start, resource_size_t n, const char *name) { … } EXPORT_SYMBOL(…); /* * Let drivers know whether the resource checks are effective */ int acpi_resources_are_enforced(void) { … } EXPORT_SYMBOL(…); /* * Deallocate the memory for a spinlock. */ void acpi_os_delete_lock(acpi_spinlock handle) { … } /* * Acquire a spinlock. * * handle is a pointer to the spinlock_t. */ acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) __acquires(lockp) { … } /* * Release a spinlock. See above. */ void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags not_used) __releases(lockp) { … } #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) { … } /******************************************************************************* * * 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) { … } /******************************************************************************* * * 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) { … } /******************************************************************************* * * 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) { … } #endif static int __init acpi_no_static_ssdt_setup(char *s) { … } early_param(…); static int __init acpi_disable_return_repair(char *s) { … } __setup(…); acpi_status __init acpi_os_initialize(void) { … } acpi_status __init acpi_os_initialize1(void) { … } acpi_status acpi_os_terminate(void) { … } acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control) { … } void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, u32 pm1a_ctrl, u32 pm1b_ctrl)) { … } #if (ACPI_REDUCED_HARDWARE) acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, u32 val_b) { … } #else acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, u32 val_b) { return AE_OK; } #endif void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, u32 val_a, u32 val_b)) { … } acpi_status acpi_os_enter_sleep(u8 sleep_state, u32 reg_a_value, u32 reg_b_value) { … }
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