1241 строка
28 KiB
C
1241 строка
28 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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*
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/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/dmi.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 <acpi/acpi.h>
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#include <asm/io.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/processor.h>
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#include <asm/uaccess.h>
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#include <linux/efi.h>
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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#define PREFIX "ACPI: "
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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 CONFIG_ACPI_CUSTOM_DSDT
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#include CONFIG_ACPI_CUSTOM_DSDT_FILE
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#endif
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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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extern char line_buf[80];
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#endif /*ENABLE_DEBUGGER */
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static unsigned int acpi_irq_irq;
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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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#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
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static char osi_additional_string[OSI_STRING_LENGTH_MAX];
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static int osi_linux; /* disable _OSI(Linux) by default */
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#ifdef CONFIG_DMI
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static struct __initdata dmi_system_id acpi_osl_dmi_table[];
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#endif
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static void __init acpi_request_region (struct acpi_generic_address *addr,
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unsigned int length, char *desc)
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{
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struct resource *res;
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if (!addr->address || !length)
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return;
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if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
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res = request_region(addr->address, length, desc);
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else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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res = request_mem_region(addr->address, 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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device_initcall(acpi_reserve_resources);
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acpi_status __init acpi_os_initialize(void)
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{
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dmi_check_system(acpi_osl_dmi_table);
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return AE_OK;
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}
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acpi_status acpi_os_initialize1(void)
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{
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/*
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* Initialize PCI configuration space access, as we'll need to access
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* it while walking the namespace (bus 0 and root bridges w/ _BBNs).
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*/
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if (!raw_pci_ops) {
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printk(KERN_ERR PREFIX
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"Access to PCI configuration space unavailable\n");
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return AE_NULL_ENTRY;
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}
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kacpid_wq = create_singlethread_workqueue("kacpid");
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kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
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BUG_ON(!kacpid_wq);
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BUG_ON(!kacpi_notify_wq);
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return AE_OK;
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}
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acpi_status acpi_os_terminate(void)
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{
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if (acpi_irq_handler) {
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acpi_os_remove_interrupt_handler(acpi_irq_irq,
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acpi_irq_handler);
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}
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destroy_workqueue(kacpid_wq);
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destroy_workqueue(kacpi_notify_wq);
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return AE_OK;
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}
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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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printk("%s", buffer);
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}
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#else
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printk("%s", buffer);
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#endif
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}
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acpi_physical_address __init acpi_os_get_root_pointer(void)
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{
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if (efi_enabled) {
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if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
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return efi.acpi20;
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else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
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return efi.acpi;
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else {
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printk(KERN_ERR PREFIX
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"System description tables not found\n");
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return 0;
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}
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} else
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return acpi_find_rsdp();
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}
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void __iomem *acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
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{
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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_gbl_permanent_mmap)
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/*
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* ioremap checks to ensure this is in reserved space
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*/
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return ioremap((unsigned long)phys, size);
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else
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return __acpi_map_table((unsigned long)phys, size);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_memory);
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void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
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{
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if (acpi_gbl_permanent_mmap) {
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iounmap(virt);
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}
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}
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EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
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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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#define ACPI_MAX_OVERRIDE_LEN 100
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static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
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acpi_status
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acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
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acpi_string * new_val)
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{
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if (!init_val || !new_val)
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return AE_BAD_PARAMETER;
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*new_val = NULL;
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if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
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printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
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acpi_os_name);
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*new_val = acpi_os_name;
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}
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return AE_OK;
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}
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acpi_status
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acpi_os_table_override(struct acpi_table_header * existing_table,
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struct acpi_table_header ** new_table)
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{
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if (!existing_table || !new_table)
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return AE_BAD_PARAMETER;
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#ifdef CONFIG_ACPI_CUSTOM_DSDT
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if (strncmp(existing_table->signature, "DSDT", 4) == 0)
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*new_table = (struct acpi_table_header *)AmlCode;
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else
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*new_table = NULL;
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#else
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*new_table = NULL;
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#endif
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return AE_OK;
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}
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static irqreturn_t acpi_irq(int irq, void *dev_id)
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{
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return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE;
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}
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acpi_status
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acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
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void *context)
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{
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unsigned int irq;
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/*
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* Ignore the GSI from the core, and use the value in our copy of the
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* FADT. It may not be the same if an interrupt source override exists
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* for the SCI.
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*/
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gsi = acpi_gbl_FADT.sci_interrupt;
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if (acpi_gsi_to_irq(gsi, &irq) < 0) {
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printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
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gsi);
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return AE_OK;
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}
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acpi_irq_handler = handler;
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acpi_irq_context = context;
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if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
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printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
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return AE_NOT_ACQUIRED;
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}
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acpi_irq_irq = irq;
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return AE_OK;
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}
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acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
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{
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if (irq) {
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free_irq(irq, acpi_irq);
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acpi_irq_handler = NULL;
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acpi_irq_irq = 0;
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}
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return AE_OK;
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}
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/*
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* Running in interpreter thread context, safe to sleep
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*/
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void acpi_os_sleep(acpi_integer ms)
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{
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schedule_timeout_interruptible(msecs_to_jiffies(ms));
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}
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EXPORT_SYMBOL(acpi_os_sleep);
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void acpi_os_stall(u32 us)
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{
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while (us) {
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u32 delay = 1000;
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if (delay > us)
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delay = us;
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udelay(delay);
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touch_nmi_watchdog();
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us -= delay;
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}
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}
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EXPORT_SYMBOL(acpi_os_stall);
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/*
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* Support ACPI 3.0 AML Timer operand
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* Returns 64-bit free-running, monotonically increasing timer
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* with 100ns granularity
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*/
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u64 acpi_os_get_timer(void)
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{
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static u64 t;
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#ifdef CONFIG_HPET
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/* TBD: use HPET if available */
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#endif
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#ifdef CONFIG_X86_PM_TIMER
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/* TBD: default to PM timer if HPET was not available */
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#endif
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if (!t)
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printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
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return ++t;
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}
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acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
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{
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u32 dummy;
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if (!value)
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value = &dummy;
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switch (width) {
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case 8:
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*(u8 *) value = inb(port);
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break;
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case 16:
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*(u16 *) value = inw(port);
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break;
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case 32:
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*(u32 *) value = inl(port);
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break;
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default:
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BUG();
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}
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return AE_OK;
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}
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EXPORT_SYMBOL(acpi_os_read_port);
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acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
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{
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switch (width) {
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case 8:
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outb(value, port);
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break;
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case 16:
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outw(value, port);
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break;
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case 32:
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outl(value, port);
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break;
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default:
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BUG();
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}
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return AE_OK;
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}
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EXPORT_SYMBOL(acpi_os_write_port);
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acpi_status
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acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
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{
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u32 dummy;
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void __iomem *virt_addr;
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virt_addr = ioremap(phys_addr, width);
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if (!value)
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value = &dummy;
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switch (width) {
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case 8:
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*(u8 *) value = readb(virt_addr);
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break;
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case 16:
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*(u16 *) value = readw(virt_addr);
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break;
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case 32:
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*(u32 *) value = readl(virt_addr);
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break;
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default:
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BUG();
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}
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iounmap(virt_addr);
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return AE_OK;
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}
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acpi_status
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acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
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{
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void __iomem *virt_addr;
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virt_addr = ioremap(phys_addr, width);
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switch (width) {
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case 8:
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writeb(value, virt_addr);
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break;
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case 16:
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writew(value, virt_addr);
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break;
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case 32:
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writel(value, virt_addr);
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break;
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default:
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BUG();
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}
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iounmap(virt_addr);
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return AE_OK;
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}
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acpi_status
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acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
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void *value, u32 width)
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{
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int result, size;
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if (!value)
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return AE_BAD_PARAMETER;
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switch (width) {
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case 8:
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size = 1;
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break;
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case 16:
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size = 2;
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break;
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case 32:
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size = 4;
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break;
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default:
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return AE_ERROR;
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}
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BUG_ON(!raw_pci_ops);
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result = raw_pci_ops->read(pci_id->segment, pci_id->bus,
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PCI_DEVFN(pci_id->device, pci_id->function),
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reg, size, value);
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return (result ? AE_ERROR : AE_OK);
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}
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EXPORT_SYMBOL(acpi_os_read_pci_configuration);
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acpi_status
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acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
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acpi_integer value, u32 width)
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{
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int result, size;
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switch (width) {
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case 8:
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size = 1;
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break;
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case 16:
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size = 2;
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break;
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case 32:
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size = 4;
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break;
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default:
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return AE_ERROR;
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}
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BUG_ON(!raw_pci_ops);
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result = raw_pci_ops->write(pci_id->segment, pci_id->bus,
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PCI_DEVFN(pci_id->device, pci_id->function),
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reg, size, value);
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return (result ? AE_ERROR : AE_OK);
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}
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|
|
/* TODO: Change code to take advantage of driver model more */
|
|
static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */
|
|
acpi_handle chandle, /* current node */
|
|
struct acpi_pci_id **id,
|
|
int *is_bridge, u8 * bus_number)
|
|
{
|
|
acpi_handle handle;
|
|
struct acpi_pci_id *pci_id = *id;
|
|
acpi_status status;
|
|
unsigned long temp;
|
|
acpi_object_type type;
|
|
u8 tu8;
|
|
|
|
acpi_get_parent(chandle, &handle);
|
|
if (handle != rhandle) {
|
|
acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
|
|
bus_number);
|
|
|
|
status = acpi_get_type(handle, &type);
|
|
if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
|
|
return;
|
|
|
|
status =
|
|
acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
|
|
&temp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
|
|
pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
|
|
|
|
if (*is_bridge)
|
|
pci_id->bus = *bus_number;
|
|
|
|
/* any nicer way to get bus number of bridge ? */
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8,
|
|
8);
|
|
if (ACPI_SUCCESS(status)
|
|
&& ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) {
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x18,
|
|
&tu8, 8);
|
|
if (!ACPI_SUCCESS(status)) {
|
|
/* Certainly broken... FIX ME */
|
|
return;
|
|
}
|
|
*is_bridge = 1;
|
|
pci_id->bus = tu8;
|
|
status =
|
|
acpi_os_read_pci_configuration(pci_id, 0x19,
|
|
&tu8, 8);
|
|
if (ACPI_SUCCESS(status)) {
|
|
*bus_number = tu8;
|
|
}
|
|
} else
|
|
*is_bridge = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */
|
|
acpi_handle chandle, /* current node */
|
|
struct acpi_pci_id **id)
|
|
{
|
|
int is_bridge = 1;
|
|
u8 bus_number = (*id)->bus;
|
|
|
|
acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
|
|
}
|
|
|
|
static void acpi_os_execute_deferred(struct work_struct *work)
|
|
{
|
|
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
|
|
if (!dpc) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
dpc->function(dpc->context);
|
|
kfree(dpc);
|
|
|
|
/* Yield cpu to notify thread */
|
|
cond_resched();
|
|
|
|
return;
|
|
}
|
|
|
|
static void acpi_os_execute_notify(struct work_struct *work)
|
|
{
|
|
struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
|
|
|
|
if (!dpc) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
dpc->function(dpc->context);
|
|
|
|
kfree(dpc);
|
|
|
|
return;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Scheduling function [%p(%p)] for deferred execution.\n",
|
|
function, context));
|
|
|
|
if (!function)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
/*
|
|
* 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 = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
|
|
if (!dpc)
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
|
|
dpc->function = function;
|
|
dpc->context = context;
|
|
|
|
if (type == OSL_NOTIFY_HANDLER) {
|
|
INIT_WORK(&dpc->work, acpi_os_execute_notify);
|
|
if (!queue_work(kacpi_notify_wq, &dpc->work)) {
|
|
status = AE_ERROR;
|
|
kfree(dpc);
|
|
}
|
|
} else {
|
|
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
|
|
if (!queue_work(kacpid_wq, &dpc->work)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Call to queue_work() failed.\n"));
|
|
status = AE_ERROR;
|
|
kfree(dpc);
|
|
}
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_execute);
|
|
|
|
void acpi_os_wait_events_complete(void *context)
|
|
{
|
|
flush_workqueue(kacpid_wq);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_wait_events_complete);
|
|
|
|
/*
|
|
* Allocate the memory for a spinlock and initialize it.
|
|
*/
|
|
acpi_status acpi_os_create_lock(acpi_spinlock * handle)
|
|
{
|
|
spin_lock_init(*handle);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* Deallocate the memory for a spinlock.
|
|
*/
|
|
void acpi_os_delete_lock(acpi_spinlock handle)
|
|
{
|
|
return;
|
|
}
|
|
|
|
acpi_status
|
|
acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
|
|
{
|
|
struct semaphore *sem = NULL;
|
|
|
|
|
|
sem = acpi_os_allocate(sizeof(struct semaphore));
|
|
if (!sem)
|
|
return AE_NO_MEMORY;
|
|
memset(sem, 0, sizeof(struct semaphore));
|
|
|
|
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;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_create_semaphore);
|
|
|
|
/*
|
|
* 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));
|
|
|
|
kfree(sem);
|
|
sem = NULL;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_delete_semaphore);
|
|
|
|
/*
|
|
* TODO: The kernel doesn't have a 'down_timeout' function -- had to
|
|
* improvise. The process is to sleep for one scheduler quantum
|
|
* until the semaphore becomes available. Downside is that this
|
|
* may result in starvation for timeout-based waits when there's
|
|
* lots of semaphore activity.
|
|
*
|
|
* 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;
|
|
int ret = 0;
|
|
|
|
|
|
if (!sem || (units < 1))
|
|
return AE_BAD_PARAMETER;
|
|
|
|
if (units > 1)
|
|
return AE_SUPPORT;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
|
|
handle, units, timeout));
|
|
|
|
/*
|
|
* This can be called during resume with interrupts off.
|
|
* Like boot-time, we should be single threaded and will
|
|
* always get the lock if we try -- timeout or not.
|
|
* If this doesn't succeed, then we will oops courtesy of
|
|
* might_sleep() in down().
|
|
*/
|
|
if (!down_trylock(sem))
|
|
return AE_OK;
|
|
|
|
switch (timeout) {
|
|
/*
|
|
* No Wait:
|
|
* --------
|
|
* A zero timeout value indicates that we shouldn't wait - just
|
|
* acquire the semaphore if available otherwise return AE_TIME
|
|
* (a.k.a. 'would block').
|
|
*/
|
|
case 0:
|
|
if (down_trylock(sem))
|
|
status = AE_TIME;
|
|
break;
|
|
|
|
/*
|
|
* Wait Indefinitely:
|
|
* ------------------
|
|
*/
|
|
case ACPI_WAIT_FOREVER:
|
|
down(sem);
|
|
break;
|
|
|
|
/*
|
|
* Wait w/ Timeout:
|
|
* ----------------
|
|
*/
|
|
default:
|
|
// TODO: A better timeout algorithm?
|
|
{
|
|
int i = 0;
|
|
static const int quantum_ms = 1000 / HZ;
|
|
|
|
ret = down_trylock(sem);
|
|
for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) {
|
|
schedule_timeout_interruptible(1);
|
|
ret = down_trylock(sem);
|
|
}
|
|
|
|
if (ret != 0)
|
|
status = AE_TIME;
|
|
}
|
|
break;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_wait_semaphore);
|
|
|
|
/*
|
|
* TODO: Support for units > 1?
|
|
*/
|
|
acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
|
|
{
|
|
struct semaphore *sem = (struct semaphore *)handle;
|
|
|
|
|
|
if (!sem || (units < 1))
|
|
return AE_BAD_PARAMETER;
|
|
|
|
if (units > 1)
|
|
return AE_SUPPORT;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
|
|
units));
|
|
|
|
up(sem);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_signal_semaphore);
|
|
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
u32 acpi_os_get_line(char *buffer)
|
|
{
|
|
|
|
#ifdef ENABLE_DEBUGGER
|
|
if (acpi_in_debugger) {
|
|
u32 chars;
|
|
|
|
kdb_read(buffer, sizeof(line_buf));
|
|
|
|
/* remove the CR kdb includes */
|
|
chars = strlen(buffer) - 1;
|
|
buffer[chars] = '\0';
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
acpi_status acpi_os_signal(u32 function, void *info)
|
|
{
|
|
switch (function) {
|
|
case ACPI_SIGNAL_FATAL:
|
|
printk(KERN_ERR PREFIX "Fatal opcode executed\n");
|
|
break;
|
|
case ACPI_SIGNAL_BREAKPOINT:
|
|
/*
|
|
* AML Breakpoint
|
|
* ACPI spec. says to treat it as a NOP unless
|
|
* you are debugging. So if/when we integrate
|
|
* AML debugger into the kernel debugger its
|
|
* hook will go here. But until then it is
|
|
* not useful to print anything on breakpoints.
|
|
*/
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_os_signal);
|
|
|
|
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; 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);
|
|
|
|
static void enable_osi_linux(int enable) {
|
|
|
|
if (osi_linux != enable)
|
|
printk(KERN_INFO PREFIX "%sabled _OSI(Linux)\n",
|
|
enable ? "En": "Dis");
|
|
|
|
osi_linux = enable;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Modify the list of "OS Interfaces" reported to BIOS via _OSI
|
|
*
|
|
* empty string disables _OSI
|
|
* string starting with '!' disables that string
|
|
* otherwise string is added to list, augmenting built-in strings
|
|
*/
|
|
static int __init acpi_osi_setup(char *str)
|
|
{
|
|
if (str == NULL || *str == '\0') {
|
|
printk(KERN_INFO PREFIX "_OSI method disabled\n");
|
|
acpi_gbl_create_osi_method = FALSE;
|
|
} else if (!strcmp("!Linux", str)) {
|
|
enable_osi_linux(0);
|
|
} else if (*str == '!') {
|
|
if (acpi_osi_invalidate(++str) == AE_OK)
|
|
printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
|
|
} else if (!strcmp("Linux", str)) {
|
|
enable_osi_linux(1);
|
|
} else if (*osi_additional_string == '\0') {
|
|
strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
|
|
printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_osi=", acpi_osi_setup);
|
|
|
|
/* enable serialization to combat AE_ALREADY_EXISTS errors */
|
|
static int __init acpi_serialize_setup(char *str)
|
|
{
|
|
printk(KERN_INFO PREFIX "serialize enabled\n");
|
|
|
|
acpi_gbl_all_methods_serialized = TRUE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_serialize", acpi_serialize_setup);
|
|
|
|
/*
|
|
* Wake and Run-Time GPES are expected to be separate.
|
|
* We disable wake-GPEs at run-time to prevent spurious
|
|
* interrupts.
|
|
*
|
|
* However, if a system exists that shares Wake and
|
|
* Run-time events on the same GPE this flag is available
|
|
* to tell Linux to keep the wake-time GPEs enabled at run-time.
|
|
*/
|
|
static int __init acpi_wake_gpes_always_on_setup(char *str)
|
|
{
|
|
printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
|
|
|
|
acpi_gbl_leave_wake_gpes_disabled = FALSE;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
|
|
|
|
/*
|
|
* max_cstate is defined in the base kernel so modules can
|
|
* change it w/o depending on the state of the processor module.
|
|
*/
|
|
unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER;
|
|
|
|
EXPORT_SYMBOL(max_cstate);
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_validate_interface
|
|
*
|
|
* PARAMETERS: interface - Requested interface to be validated
|
|
*
|
|
* RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
|
|
*
|
|
* DESCRIPTION: Match an interface string to the interfaces supported by the
|
|
* host. Strings originate from an AML call to the _OSI method.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_validate_interface (char *interface)
|
|
{
|
|
if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
|
|
return AE_OK;
|
|
if (!strcmp("Linux", interface)) {
|
|
printk(KERN_WARNING PREFIX
|
|
"System BIOS is requesting _OSI(Linux)\n");
|
|
printk(KERN_WARNING PREFIX
|
|
"If \"acpi_osi=Linux\" works better,\n"
|
|
"Please send dmidecode "
|
|
"to linux-acpi@vger.kernel.org\n");
|
|
if(osi_linux)
|
|
return AE_OK;
|
|
}
|
|
return AE_SUPPORT;
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_os_validate_address
|
|
*
|
|
* PARAMETERS: space_id - ACPI space ID
|
|
* address - Physical address
|
|
* length - Address length
|
|
*
|
|
* RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
|
|
* should return AE_AML_ILLEGAL_ADDRESS.
|
|
*
|
|
* DESCRIPTION: Validate a system address via the host OS. Used to validate
|
|
* the addresses accessed by AML operation regions.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_os_validate_address (
|
|
u8 space_id,
|
|
acpi_physical_address address,
|
|
acpi_size length)
|
|
{
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
#ifdef CONFIG_DMI
|
|
static int dmi_osi_linux(const struct dmi_system_id *d)
|
|
{
|
|
printk(KERN_NOTICE "%s detected: enabling _OSI(Linux)\n", d->ident);
|
|
enable_osi_linux(1);
|
|
return 0;
|
|
}
|
|
|
|
static struct dmi_system_id acpi_osl_dmi_table[] __initdata = {
|
|
/*
|
|
* Boxes that need _OSI(Linux)
|
|
*/
|
|
{
|
|
.callback = dmi_osi_linux,
|
|
.ident = "Intel Napa CRB",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "MPAD-MSAE Customer Reference Boards"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
#endif /* CONFIG_DMI */
|
|
|
|
#endif
|