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![Rafael J. Wysocki](/assets/img/avatar_default.png)
* acpi-property: ACPI / property: Switch to bitmap_zalloc() * acpi-sbs: ACPI / SBS: Fix rare oops when removing modules ACPI / SBS: Fix GPE storm on recent MacBookPro's
1831 lines
42 KiB
C
1831 lines
42 KiB
C
/*
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* acpi_osl.c - OS-dependent functions ($Revision: 83 $)
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*
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* Copyright (C) 2000 Andrew Henroid
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (c) 2008 Intel Corporation
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* Author: Matthew Wilcox <willy@linux.intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/kmod.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/nmi.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/jiffies.h>
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#include <linux/semaphore.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <linux/io-64-nonatomic-lo-hi.h>
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#include "acpica/accommon.h"
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#include "acpica/acnamesp.h"
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#include "internal.h"
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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struct acpi_os_dpc {
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acpi_osd_exec_callback function;
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void *context;
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struct work_struct work;
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};
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#ifdef ENABLE_DEBUGGER
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#include <linux/kdb.h>
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/* stuff for debugger support */
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int acpi_in_debugger;
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EXPORT_SYMBOL(acpi_in_debugger);
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#endif /*ENABLE_DEBUGGER */
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static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
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u32 pm1b_ctrl);
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static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
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u32 val_b);
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static acpi_osd_handler acpi_irq_handler;
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static void *acpi_irq_context;
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static struct workqueue_struct *kacpid_wq;
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static struct workqueue_struct *kacpi_notify_wq;
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static struct workqueue_struct *kacpi_hotplug_wq;
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static bool acpi_os_initialized;
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unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
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bool acpi_permanent_mmap = false;
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/*
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* This list of permanent mappings is for memory that may be accessed from
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* interrupt context, where we can't do the ioremap().
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*/
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struct acpi_ioremap {
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struct list_head list;
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void __iomem *virt;
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acpi_physical_address phys;
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acpi_size size;
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unsigned long refcount;
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};
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static LIST_HEAD(acpi_ioremaps);
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static DEFINE_MUTEX(acpi_ioremap_lock);
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static void __init acpi_request_region (struct acpi_generic_address *gas,
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unsigned int length, char *desc)
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{
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u64 addr;
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/* Handle possible alignment issues */
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memcpy(&addr, &gas->address, sizeof(addr));
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if (!addr || !length)
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return;
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/* Resources are never freed */
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if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
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request_region(addr, length, desc);
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else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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request_mem_region(addr, length, desc);
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}
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static int __init acpi_reserve_resources(void)
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{
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acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
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"ACPI PM1a_EVT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
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"ACPI PM1b_EVT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
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"ACPI PM1a_CNT_BLK");
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acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
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"ACPI PM1b_CNT_BLK");
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if (acpi_gbl_FADT.pm_timer_length == 4)
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acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
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acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
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"ACPI PM2_CNT_BLK");
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/* Length of GPE blocks must be a non-negative multiple of 2 */
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if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
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acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
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acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
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if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
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acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
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acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
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return 0;
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}
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fs_initcall_sync(acpi_reserve_resources);
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void acpi_os_printf(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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acpi_os_vprintf(fmt, args);
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va_end(args);
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}
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EXPORT_SYMBOL(acpi_os_printf);
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void acpi_os_vprintf(const char *fmt, va_list args)
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{
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static char buffer[512];
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vsprintf(buffer, fmt, args);
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#ifdef ENABLE_DEBUGGER
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if (acpi_in_debugger) {
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kdb_printf("%s", buffer);
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} else {
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if (printk_get_level(buffer))
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printk("%s", buffer);
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else
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printk(KERN_CONT "%s", buffer);
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}
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#else
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if (acpi_debugger_write_log(buffer) < 0) {
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if (printk_get_level(buffer))
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printk("%s", buffer);
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else
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printk(KERN_CONT "%s", buffer);
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}
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#endif
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}
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#ifdef CONFIG_KEXEC
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static unsigned long acpi_rsdp;
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static int __init setup_acpi_rsdp(char *arg)
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{
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return kstrtoul(arg, 16, &acpi_rsdp);
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}
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early_param("acpi_rsdp", setup_acpi_rsdp);
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#endif
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acpi_physical_address __init acpi_os_get_root_pointer(void)
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{
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acpi_physical_address pa;
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#ifdef CONFIG_KEXEC
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if (acpi_rsdp)
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return acpi_rsdp;
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#endif
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pa = acpi_arch_get_root_pointer();
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if (pa)
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return pa;
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if (efi_enabled(EFI_CONFIG_TABLES)) {
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if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
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return efi.acpi20;
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if (efi.acpi != EFI_INVALID_TABLE_ADDR)
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return efi.acpi;
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pr_err(PREFIX "System description tables not found\n");
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} else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
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acpi_find_root_pointer(&pa);
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}
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return pa;
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}
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
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acpi_map_lookup(acpi_physical_address phys, acpi_size size)
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{
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struct acpi_ioremap *map;
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list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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if (map->phys <= phys &&
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phys + size <= map->phys + map->size)
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return map;
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return NULL;
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}
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static void __iomem *
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acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
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{
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struct acpi_ioremap *map;
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map = acpi_map_lookup(phys, size);
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if (map)
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return map->virt + (phys - map->phys);
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return NULL;
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}
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void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt = NULL;
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup(phys, size);
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if (map) {
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virt = map->virt + (phys - map->phys);
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map->refcount++;
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}
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mutex_unlock(&acpi_ioremap_lock);
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return virt;
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}
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EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
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acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
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{
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struct acpi_ioremap *map;
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list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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if (map->virt <= virt &&
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virt + size <= map->virt + map->size)
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return map;
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return NULL;
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}
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#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
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/* ioremap will take care of cache attributes */
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#define should_use_kmap(pfn) 0
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#else
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#define should_use_kmap(pfn) page_is_ram(pfn)
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#endif
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static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
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{
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unsigned long pfn;
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pfn = pg_off >> PAGE_SHIFT;
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if (should_use_kmap(pfn)) {
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if (pg_sz > PAGE_SIZE)
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return NULL;
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return (void __iomem __force *)kmap(pfn_to_page(pfn));
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} else
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return acpi_os_ioremap(pg_off, pg_sz);
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}
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static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
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{
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unsigned long pfn;
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pfn = pg_off >> PAGE_SHIFT;
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if (should_use_kmap(pfn))
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kunmap(pfn_to_page(pfn));
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else
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iounmap(vaddr);
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}
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/**
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* acpi_os_map_iomem - Get a virtual address for a given physical address range.
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* @phys: Start of the physical address range to map.
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* @size: Size of the physical address range to map.
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*
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* Look up the given physical address range in the list of existing ACPI memory
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* mappings. If found, get a reference to it and return a pointer to it (its
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* virtual address). If not found, map it, add it to that list and return a
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* pointer to it.
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*
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* During early init (when acpi_permanent_mmap has not been set yet) this
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* routine simply calls __acpi_map_table() to get the job done.
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*/
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void __iomem *__ref
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acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt;
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acpi_physical_address pg_off;
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acpi_size pg_sz;
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if (phys > ULONG_MAX) {
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printk(KERN_ERR PREFIX "Cannot map memory that high\n");
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return NULL;
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}
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if (!acpi_permanent_mmap)
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return __acpi_map_table((unsigned long)phys, size);
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mutex_lock(&acpi_ioremap_lock);
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/* Check if there's a suitable mapping already. */
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map = acpi_map_lookup(phys, size);
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if (map) {
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map->refcount++;
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goto out;
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}
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map = kzalloc(sizeof(*map), GFP_KERNEL);
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if (!map) {
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mutex_unlock(&acpi_ioremap_lock);
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return NULL;
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}
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pg_off = round_down(phys, PAGE_SIZE);
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pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
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virt = acpi_map(pg_off, pg_sz);
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if (!virt) {
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mutex_unlock(&acpi_ioremap_lock);
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kfree(map);
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return NULL;
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}
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INIT_LIST_HEAD(&map->list);
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map->virt = virt;
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map->phys = pg_off;
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map->size = pg_sz;
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map->refcount = 1;
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list_add_tail_rcu(&map->list, &acpi_ioremaps);
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out:
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mutex_unlock(&acpi_ioremap_lock);
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return map->virt + (phys - map->phys);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
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void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
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{
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return (void *)acpi_os_map_iomem(phys, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_memory);
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static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
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{
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if (!--map->refcount)
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list_del_rcu(&map->list);
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}
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static void acpi_os_map_cleanup(struct acpi_ioremap *map)
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{
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if (!map->refcount) {
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synchronize_rcu_expedited();
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acpi_unmap(map->phys, map->virt);
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kfree(map);
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}
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}
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/**
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* acpi_os_unmap_iomem - Drop a memory mapping reference.
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* @virt: Start of the address range to drop a reference to.
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* @size: Size of the address range to drop a reference to.
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*
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* Look up the given virtual address range in the list of existing ACPI memory
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* mappings, drop a reference to it and unmap it if there are no more active
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* references to it.
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*
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* During early init (when acpi_permanent_mmap has not been set yet) this
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* routine simply calls __acpi_unmap_table() to get the job done. Since
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* __acpi_unmap_table() is an __init function, the __ref annotation is needed
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* here.
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*/
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void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
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{
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struct acpi_ioremap *map;
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if (!acpi_permanent_mmap) {
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__acpi_unmap_table(virt, size);
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return;
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}
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup_virt(virt, size);
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if (!map) {
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mutex_unlock(&acpi_ioremap_lock);
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WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
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return;
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}
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acpi_os_drop_map_ref(map);
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mutex_unlock(&acpi_ioremap_lock);
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acpi_os_map_cleanup(map);
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}
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EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
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void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
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{
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return acpi_os_unmap_iomem((void __iomem *)virt, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
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int acpi_os_map_generic_address(struct acpi_generic_address *gas)
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{
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u64 addr;
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void __iomem *virt;
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if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
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return 0;
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/* Handle possible alignment issues */
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memcpy(&addr, &gas->address, sizeof(addr));
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if (!addr || !gas->bit_width)
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return -EINVAL;
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virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
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if (!virt)
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return -EIO;
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return 0;
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}
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EXPORT_SYMBOL(acpi_os_map_generic_address);
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void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
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{
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u64 addr;
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struct acpi_ioremap *map;
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if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
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return;
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/* Handle possible alignment issues */
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memcpy(&addr, &gas->address, sizeof(addr));
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if (!addr || !gas->bit_width)
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return;
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup(addr, gas->bit_width / 8);
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if (!map) {
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mutex_unlock(&acpi_ioremap_lock);
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return;
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}
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acpi_os_drop_map_ref(map);
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mutex_unlock(&acpi_ioremap_lock);
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acpi_os_map_cleanup(map);
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}
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EXPORT_SYMBOL(acpi_os_unmap_generic_address);
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
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{
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if (!phys || !virt)
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return AE_BAD_PARAMETER;
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*phys = virt_to_phys(virt);
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return AE_OK;
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}
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#endif
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|
|
|
#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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
#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)
|
|
{
|
|
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);
|
|
}
|
|
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;
|
|
}
|