/drivers/acpi/osl.c
http://github.com/mirrors/linux · C · 1841 lines · 1472 code · 226 blank · 143 comment · 169 complexity · 617a589a7da0f8182164acebd4b9e867 MD5 · raw file
- // 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 <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>
- */
- #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 "acpica/acnamesp.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 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 = INVALID_ACPI_IRQ;
- bool acpi_permanent_mmap = false;
- /*
- * 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);
- #define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map)
- 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;
- /* Resources are never freed */
- if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
- request_region(addr, length, desc);
- else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
- request_mem_region(addr, length, desc);
- }
- static int __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");
- return 0;
- }
- fs_initcall_sync(acpi_reserve_resources);
- void acpi_os_printf(const char *fmt, ...)
- {
- va_list args;
- va_start(args, fmt);
- acpi_os_vprintf(fmt, args);
- va_end(args);
- }
- EXPORT_SYMBOL(acpi_os_printf);
- 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 {
- if (printk_get_level(buffer))
- printk("%s", buffer);
- else
- printk(KERN_CONT "%s", buffer);
- }
- #else
- if (acpi_debugger_write_log(buffer) < 0) {
- if (printk_get_level(buffer))
- printk("%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)
- {
- return kstrtoul(arg, 16, &acpi_rsdp);
- }
- early_param("acpi_rsdp", setup_acpi_rsdp);
- #endif
- acpi_physical_address __init acpi_os_get_root_pointer(void)
- {
- acpi_physical_address pa;
- #ifdef CONFIG_KEXEC
- /*
- * We may have been provided with an RSDP on the command line,
- * but if a malicious user has done so they may be pointing us
- * at modified ACPI tables that could alter kernel behaviour -
- * so, we check the lockdown status before making use of
- * it. If we trust it then also stash it in an architecture
- * specific location (if appropriate) so it can be carried
- * over further kexec()s.
- */
- if (acpi_rsdp && !security_locked_down(LOCKDOWN_ACPI_TABLES)) {
- acpi_arch_set_root_pointer(acpi_rsdp);
- return acpi_rsdp;
- }
- #endif
- pa = acpi_arch_get_root_pointer();
- if (pa)
- return pa;
- if (efi_enabled(EFI_CONFIG_TABLES)) {
- if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
- return efi.acpi20;
- if (efi.acpi != EFI_INVALID_TABLE_ADDR)
- return efi.acpi;
- pr_err(PREFIX "System description tables not found\n");
- } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
- acpi_find_root_pointer(&pa);
- }
- return pa;
- }
- /* 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, acpi_ioremap_lock_held())
- 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, acpi_ioremap_lock_held())
- 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);
- }
- /**
- * 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)
- {
- 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_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 *__ref 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);
- /* Must be called with mutex_lock(&acpi_ioremap_lock) */
- static unsigned long acpi_os_drop_map_ref(struct acpi_ioremap *map)
- {
- unsigned long refcount = --map->refcount;
- if (!refcount)
- list_del_rcu(&map->list);
- return refcount;
- }
- static void acpi_os_map_cleanup(struct acpi_ioremap *map)
- {
- synchronize_rcu_expedited();
- acpi_unmap(map->phys, map->virt);
- kfree(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 unmap it if there are no more active
- * references to it.
- *
- * 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)
- {
- struct acpi_ioremap *map;
- unsigned long refcount;
- if (!acpi_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;
- }
- refcount = acpi_os_drop_map_ref(map);
- mutex_unlock(&acpi_ioremap_lock);
- if (!refcount)
- 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);
- 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;
- unsigned long refcount;
- 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;
- }
- refcount = acpi_os_drop_map_ref(map);
- mutex_unlock(&acpi_ioremap_lock);
- if (!refcount)
- 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,
- acpi_string *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;
- }
- 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;
- }
- acpi_sci_irq = irq;
- return AE_OK;
- }
- acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
- {
- if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
- return AE_BAD_PARAMETER;
- free_irq(acpi_sci_irq, acpi_irq);
- acpi_irq_handler = NULL;
- acpi_sci_irq = INVALID_ACPI_IRQ;
- 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 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)
- {
- return (get_jiffies_64() - INITIAL_JIFFIES) *
- (ACPI_100NSEC_PER_SEC / HZ);
- }
- 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);
- int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width)
- {
- 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 = readq(virt_addr);
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- 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;
- int error;
- 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;
- error = acpi_os_read_iomem(virt_addr, value, width);
- BUG_ON(error);
- if (unmap)
- iounmap(virt_addr);
- else
- rcu_read_unlock();
- return AE_OK;
- }
- 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:
- writeq(value, virt_addr);
- break;
- default:
- BUG();
- }
- if (unmap)
- iounmap(virt_addr);
- else
- rcu_read_unlock();
- return AE_OK;
- }
- #ifdef CONFIG_PCI
- 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);
- }
- #endif
- 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);
- }
- #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)
- {
- int ret = 0;
- mutex_lock(&acpi_debugger.lock);
- if (acpi_debugger.ops) {
- ret = -EBUSY;
- goto err_lock;
- }
- acpi_debugger.owner = owner;
- acpi_debugger.ops = ops;
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- EXPORT_SYMBOL(acpi_register_debugger);
- void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
- {
- mutex_lock(&acpi_debugger.lock);
- if (ops == acpi_debugger.ops) {
- acpi_debugger.ops = NULL;
- acpi_debugger.owner = NULL;
- }
- mutex_unlock(&acpi_debugger.lock);
- }
- EXPORT_SYMBOL(acpi_unregister_debugger);
- int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
- {
- int ret;
- int (*func)(acpi_osd_exec_callback, void *);
- struct module *owner;
- if (!acpi_debugger_initialized)
- return -ENODEV;
- mutex_lock(&acpi_debugger.lock);
- if (!acpi_debugger.ops) {
- ret = -ENODEV;
- goto err_lock;
- }
- if (!try_module_get(acpi_debugger.owner)) {
- ret = -ENODEV;
- goto err_lock;
- }
- func = acpi_debugger.ops->create_thread;
- owner = acpi_debugger.owner;
- mutex_unlock(&acpi_debugger.lock);
- ret = func(function, context);
- mutex_lock(&acpi_debugger.lock);
- module_put(owner);
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- ssize_t acpi_debugger_write_log(const char *msg)
- {
- ssize_t ret;
- ssize_t (*func)(const char *);
- struct module *owner;
- if (!acpi_debugger_initialized)
- return -ENODEV;
- mutex_lock(&acpi_debugger.lock);
- if (!acpi_debugger.ops) {
- ret = -ENODEV;
- goto err_lock;
- }
- if (!try_module_get(acpi_debugger.owner)) {
- ret = -ENODEV;
- goto err_lock;
- }
- func = acpi_debugger.ops->write_log;
- owner = acpi_debugger.owner;
- mutex_unlock(&acpi_debugger.lock);
- ret = func(msg);
- mutex_lock(&acpi_debugger.lock);
- module_put(owner);
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
- {
- ssize_t ret;
- ssize_t (*func)(char *, size_t);
- struct module *owner;
- if (!acpi_debugger_initialized)
- return -ENODEV;
- mutex_lock(&acpi_debugger.lock);
- if (!acpi_debugger.ops) {
- ret = -ENODEV;
- goto err_lock;
- }
- if (!try_module_get(acpi_debugger.owner)) {
- ret = -ENODEV;
- goto err_lock;
- }
- func = acpi_debugger.ops->read_cmd;
- owner = acpi_debugger.owner;
- mutex_unlock(&acpi_debugger.lock);
- ret = func(buffer, buffer_length);
- mutex_lock(&acpi_debugger.lock);
- module_put(owner);
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- int acpi_debugger_wait_command_ready(void)
- {
- int ret;
- int (*func)(bool, char *, size_t);
- struct module *owner;
- if (!acpi_debugger_initialized)
- return -ENODEV;
- mutex_lock(&acpi_debugger.lock);
- if (!acpi_debugger.ops) {
- ret = -ENODEV;
- goto err_lock;
- }
- if (!try_module_get(acpi_debugger.owner)) {
- ret = -ENODEV;
- goto err_lock;
- }
- func = acpi_debugger.ops->wait_command_ready;
- owner = acpi_debugger.owner;
- mutex_unlock(&acpi_debugger.lock);
- ret = func(acpi_gbl_method_executing,
- acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
- mutex_lock(&acpi_debugger.lock);
- module_put(owner);
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- int acpi_debugger_notify_command_complete(void)
- {
- int ret;
- int (*func)(void);
- struct module *owner;
- if (!acpi_debugger_initialized)
- return -ENODEV;
- mutex_lock(&acpi_debugger.lock);
- if (!acpi_debugger.ops) {
- ret = -ENODEV;
- goto err_lock;
- }
- if (!try_module_get(acpi_debugger.owner)) {
- ret = -ENODEV;
- goto err_lock;
- }
- func = acpi_debugger.ops->notify_command_complete;
- owner = acpi_debugger.owner;
- mutex_unlock(&acpi_debugger.lock);
- ret = func();
- mutex_lock(&acpi_debugger.lock);
- module_put(owner);
- err_lock:
- mutex_unlock(&acpi_debugger.lock);
- return ret;
- }
- int __init acpi_debugger_init(void)
- {
- mutex_init(&acpi_debugger.lock);
- acpi_debugger_initialized = true;
- return 0;
- }
- #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)
- {
- 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));
- if (type == OSL_DEBUGGER_MAIN_THREAD) {
- ret = acpi_debugger_create_thread(function, context);
- if (ret) {
- pr_err("Call to kthread_create() failed.\n");
- status = AE_ERROR;
- }
- goto out_thread;
- }
- /*
- * 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 if (type == OSL_GPE_HANDLER) {
- queue = kacpid_wq;
- INIT_WORK(&dpc->work, acpi_os_execute_deferred);
- } else {
- pr_err("Unsupported os_execute type %d.\n", type);
- status = AE_ERROR;
- }
- if (ACPI_FAILURE(status))
- goto err_workqueue;
- /*
- * 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;
- }
- err_workqueue:
- if (ACPI_FAILURE(status))
- kfree(dpc);
- out_thread:
- 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_sci_irq_valid())
- synchronize_hardirq(acpi_sci_irq);
- flush_workqueue(kacpid_wq);
- flush_workqueue(kacpi_notify_wq);
- }
- EXPORT_SYMBOL(acpi_os_wait_events_complete);
- 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 (!acpi_os_initialized)
- return AE_OK;
- 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 (!acpi_os_initialized)
- return AE_OK;
- 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;
- }
- acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
- {
- #ifdef ENABLE_DEBUGGER
- if (acpi_in_debugger) {
- u32 chars;
- kdb_read(buffer, buffer_length);
- /* remove the CR kdb includes */
- chars = strlen(buffer) - 1;
- buffer[chars] = '\0';
- }
- #else
- int ret;
- ret = acpi_debugger_read_cmd(buffer, buffer_length);
- if (ret < 0)
- return AE_ERROR;
- if (bytes_read)
- *bytes_read = ret;
- #endif
- return AE_OK;
- }
- EXPORT_SYMBOL(acpi_os_get_line);
- acpi_status acpi_os_wait_command_ready(void)
- {
- int ret;
- ret = acpi_debugger_wait_command_ready();
- if (ret < 0)
- return AE_ERROR;
- return AE_OK;
- }
- acpi_status acpi_os_notify_command_complete(void)
- {
- int ret;
- ret = acpi_debugger_notify_command_complete();
- if (ret < 0)
- return AE_ERROR;
- return AE_OK;
- }
- 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);
- /*
- * 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);
- static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
- void *_res, void **return_value)
- {
- struct acpi_mem_space_context **mem_ctx;
- union acpi_operand_object *handler_obj;
- union acpi_operand_object *region_obj2;
- union acpi_operand_object *region_obj;
- struct resource *res = _res;
- acpi_status status;
- region_obj = acpi_ns_get_attached_object(handle);
- if (!region_obj)
- return AE_OK;
- handler_obj = region_obj->region.handler;
- if (!handler_obj)
- return AE_OK;
- if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
- return AE_OK;
- if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE))
- return AE_OK;
- region_obj2 = acpi_ns_get_secondary_object(region_obj);
- if (!region_obj2)
- return AE_OK;
- mem_ctx = (void *)®ion_obj2->extra.region_context;
- if (!(mem_ctx[0]->address >= res->start &&
- mem_ctx[0]->address < res->end))
- return AE_OK;
- status = handler_obj->address_space.setup(region_obj,
- ACPI_REGION_DEACTIVATE,
- NULL, (void **)mem_ctx);
- if (ACPI_SUCCESS(status))
- region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
- return status;
- }
- /**
- * acpi_release_memory - Release any mappings done to a memory region
- * @handle: Handle to namespace node
- * @res: Memory resource
- * @level: A level that terminates the search
- *
- * Walks through @handle and unmaps all SystemMemory Operation Regions that
- * overlap with @res and that have already been activated (mapped).
- *
- * This is a helper that allows drivers to place special requirements on memory
- * region that may overlap with operation regions, primarily allowing them to
- * safely map the region as non-cached memory.
- *
- * The unmapped Operation Regions will be automatically remapped next time they
- * are called, so the drivers do not need to do anything else.
- */
- acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
- u32 level)
- {
- if (!(res->flags & IORESOURCE_MEM))
- return AE_TYPE;
- return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
- acpi_deactivate_mem_region, NULL, res, NULL);
- }
- EXPORT_SYMBOL_GPL(acpi_release_memory);
- /*
- * 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);
- /*
- * 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)
- __acquires(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)
- __releases(lockp)
- {
- 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);
- }
- acpi_os_initialized = true;
- return AE_OK;
- }
- acpi_status __init acpi_os_initialize1(void)
- {
- 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_osi_init();
- 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_TERMINATE;
- 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;
- }
- #if (ACPI_REDUCED_HARDWARE)
- 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_TERMINATE;
- return AE_OK;
- }
- #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_os_prepare_extended_sleep = func;
- }
- acpi_status acpi_os_enter_sleep(u8 sleep_state,
- u32 reg_a_value, u32 reg_b_value)
- {
- acpi_status status;
- if (acpi_gbl_reduced_hardware)
- status = acpi_os_prepare_extended_sleep(sleep_state,
- reg_a_value,
- reg_b_value);
- else
- status = acpi_os_prepare_sleep(sleep_state,
- reg_a_value, reg_b_value);
- return status;
- }