![Rafael J. Wysocki](/assets/img/avatar_default.png)
The changes in the ACPI-based PCI hotplug (ACPIPHP) subsystem made
during the 3.12 development cycle uncovered a problem with VGA
switcheroo that on some systems, when the device-specific method
(ATPX in the radeon case, _DSM in the nouveau case) is used to turn
off the discrete graphics, the BIOS generates ACPI hotplug events for
that device and those events cause ACPIPHP to attempt to remove the
device from the system (they are events for a device that was present
previously and is not present any more, so that's what should be done
according to the spec). Then, the system stops functioning correctly.
Since the hotplug events in question were simply silently ignored
previously, the least intrusive way to address that problem is to
make ACPIPHP ignore them again. For this purpose, introduce a new
ACPI device flag, no_hotplug, and modify ACPIPHP to ignore hotplug
events for PCI devices whose ACPI companions have that flag set.
Next, make the radeon and nouveau switcheroo detection code set the
no_hotplug flag for the discrete graphics' ACPI companion.
Fixes: bbd34fcdd1
(ACPI / hotplug / PCI: Register all devices under the given bridge)
References: https://bugzilla.kernel.org/show_bug.cgi?id=61891
References: https://bugzilla.kernel.org/show_bug.cgi?id=64891
Reported-and-tested-by: Mike Lothian <mike@fireburn.co.uk>
Reported-and-tested-by: <madcatx@atlas.cz>
Reported-and-tested-by: Joaquín Aramendía <samsagax@gmail.com>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
709 lines
17 KiB
C
709 lines
17 KiB
C
/*
|
|
* acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
|
|
*
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/device.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/slab.h>
|
|
#ifdef CONFIG_X86
|
|
#include <asm/mpspec.h>
|
|
#endif
|
|
#include <linux/pci.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
#include <acpi/apei.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/suspend.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#define _COMPONENT ACPI_BUS_COMPONENT
|
|
ACPI_MODULE_NAME("bus");
|
|
|
|
struct acpi_device *acpi_root;
|
|
struct proc_dir_entry *acpi_root_dir;
|
|
EXPORT_SYMBOL(acpi_root_dir);
|
|
|
|
#define STRUCT_TO_INT(s) (*((int*)&s))
|
|
|
|
|
|
#ifdef CONFIG_X86
|
|
static int set_copy_dsdt(const struct dmi_system_id *id)
|
|
{
|
|
printk(KERN_NOTICE "%s detected - "
|
|
"force copy of DSDT to local memory\n", id->ident);
|
|
acpi_gbl_copy_dsdt_locally = 1;
|
|
return 0;
|
|
}
|
|
|
|
static struct dmi_system_id dsdt_dmi_table[] __initdata = {
|
|
/*
|
|
* Invoke DSDT corruption work-around on all Toshiba Satellite.
|
|
* https://bugzilla.kernel.org/show_bug.cgi?id=14679
|
|
*/
|
|
{
|
|
.callback = set_copy_dsdt,
|
|
.ident = "TOSHIBA Satellite",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
#else
|
|
static struct dmi_system_id dsdt_dmi_table[] __initdata = {
|
|
{}
|
|
};
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Device Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
|
|
unsigned long long *sta)
|
|
{
|
|
acpi_status status;
|
|
|
|
status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
|
|
if (ACPI_SUCCESS(status))
|
|
return AE_OK;
|
|
|
|
if (status == AE_NOT_FOUND) {
|
|
*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
|
|
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
|
|
return AE_OK;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
int acpi_bus_get_status(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
unsigned long long sta;
|
|
|
|
status = acpi_bus_get_status_handle(device->handle, &sta);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
STRUCT_TO_INT(device->status) = (int) sta;
|
|
|
|
if (device->status.functional && !device->status.present) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
|
|
"functional but not present;\n",
|
|
device->pnp.bus_id,
|
|
(u32) STRUCT_TO_INT(device->status)));
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
|
|
device->pnp.bus_id,
|
|
(u32) STRUCT_TO_INT(device->status)));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_get_status);
|
|
|
|
void acpi_bus_private_data_handler(acpi_handle handle,
|
|
void *context)
|
|
{
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_private_data_handler);
|
|
|
|
int acpi_bus_get_private_data(acpi_handle handle, void **data)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!*data)
|
|
return -EINVAL;
|
|
|
|
status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
|
|
if (ACPI_FAILURE(status) || !*data) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
|
|
handle));
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_get_private_data);
|
|
|
|
void acpi_bus_no_hotplug(acpi_handle handle)
|
|
{
|
|
struct acpi_device *adev = NULL;
|
|
|
|
acpi_bus_get_device(handle, &adev);
|
|
if (adev)
|
|
adev->flags.no_hotplug = true;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug);
|
|
|
|
static void acpi_print_osc_error(acpi_handle handle,
|
|
struct acpi_osc_context *context, char *error)
|
|
{
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
|
|
int i;
|
|
|
|
if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
|
|
printk(KERN_DEBUG "%s\n", error);
|
|
else {
|
|
printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
|
|
kfree(buffer.pointer);
|
|
}
|
|
printk(KERN_DEBUG"_OSC request data:");
|
|
for (i = 0; i < context->cap.length; i += sizeof(u32))
|
|
printk("%x ", *((u32 *)(context->cap.pointer + i)));
|
|
printk("\n");
|
|
}
|
|
|
|
acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
|
|
{
|
|
int i;
|
|
static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
|
|
24, 26, 28, 30, 32, 34};
|
|
|
|
if (strlen(str) != 36)
|
|
return AE_BAD_PARAMETER;
|
|
for (i = 0; i < 36; i++) {
|
|
if (i == 8 || i == 13 || i == 18 || i == 23) {
|
|
if (str[i] != '-')
|
|
return AE_BAD_PARAMETER;
|
|
} else if (!isxdigit(str[i]))
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
for (i = 0; i < 16; i++) {
|
|
uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
|
|
uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
|
|
}
|
|
return AE_OK;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
|
|
|
|
acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_object_list input;
|
|
union acpi_object in_params[4];
|
|
union acpi_object *out_obj;
|
|
u8 uuid[16];
|
|
u32 errors;
|
|
struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
|
|
if (!context)
|
|
return AE_ERROR;
|
|
if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
|
|
return AE_ERROR;
|
|
context->ret.length = ACPI_ALLOCATE_BUFFER;
|
|
context->ret.pointer = NULL;
|
|
|
|
/* Setting up input parameters */
|
|
input.count = 4;
|
|
input.pointer = in_params;
|
|
in_params[0].type = ACPI_TYPE_BUFFER;
|
|
in_params[0].buffer.length = 16;
|
|
in_params[0].buffer.pointer = uuid;
|
|
in_params[1].type = ACPI_TYPE_INTEGER;
|
|
in_params[1].integer.value = context->rev;
|
|
in_params[2].type = ACPI_TYPE_INTEGER;
|
|
in_params[2].integer.value = context->cap.length/sizeof(u32);
|
|
in_params[3].type = ACPI_TYPE_BUFFER;
|
|
in_params[3].buffer.length = context->cap.length;
|
|
in_params[3].buffer.pointer = context->cap.pointer;
|
|
|
|
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
|
|
if (!output.length)
|
|
return AE_NULL_OBJECT;
|
|
|
|
out_obj = output.pointer;
|
|
if (out_obj->type != ACPI_TYPE_BUFFER
|
|
|| out_obj->buffer.length != context->cap.length) {
|
|
acpi_print_osc_error(handle, context,
|
|
"_OSC evaluation returned wrong type");
|
|
status = AE_TYPE;
|
|
goto out_kfree;
|
|
}
|
|
/* Need to ignore the bit0 in result code */
|
|
errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
|
|
if (errors) {
|
|
if (errors & OSC_REQUEST_ERROR)
|
|
acpi_print_osc_error(handle, context,
|
|
"_OSC request failed");
|
|
if (errors & OSC_INVALID_UUID_ERROR)
|
|
acpi_print_osc_error(handle, context,
|
|
"_OSC invalid UUID");
|
|
if (errors & OSC_INVALID_REVISION_ERROR)
|
|
acpi_print_osc_error(handle, context,
|
|
"_OSC invalid revision");
|
|
if (errors & OSC_CAPABILITIES_MASK_ERROR) {
|
|
if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
|
|
& OSC_QUERY_ENABLE)
|
|
goto out_success;
|
|
status = AE_SUPPORT;
|
|
goto out_kfree;
|
|
}
|
|
status = AE_ERROR;
|
|
goto out_kfree;
|
|
}
|
|
out_success:
|
|
context->ret.length = out_obj->buffer.length;
|
|
context->ret.pointer = kmemdup(out_obj->buffer.pointer,
|
|
context->ret.length, GFP_KERNEL);
|
|
if (!context->ret.pointer) {
|
|
status = AE_NO_MEMORY;
|
|
goto out_kfree;
|
|
}
|
|
status = AE_OK;
|
|
|
|
out_kfree:
|
|
kfree(output.pointer);
|
|
if (status != AE_OK)
|
|
context->ret.pointer = NULL;
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL(acpi_run_osc);
|
|
|
|
bool osc_sb_apei_support_acked;
|
|
static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
|
|
static void acpi_bus_osc_support(void)
|
|
{
|
|
u32 capbuf[2];
|
|
struct acpi_osc_context context = {
|
|
.uuid_str = sb_uuid_str,
|
|
.rev = 1,
|
|
.cap.length = 8,
|
|
.cap.pointer = capbuf,
|
|
};
|
|
acpi_handle handle;
|
|
|
|
capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
|
|
capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
|
|
#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
|
|
defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
|
|
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
|
|
#endif
|
|
|
|
#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
|
|
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
|
|
#endif
|
|
|
|
#ifdef ACPI_HOTPLUG_OST
|
|
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
|
|
#endif
|
|
|
|
if (!ghes_disable)
|
|
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
|
|
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
|
|
return;
|
|
if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
|
|
u32 *capbuf_ret = context.ret.pointer;
|
|
if (context.ret.length > OSC_SUPPORT_DWORD)
|
|
osc_sb_apei_support_acked =
|
|
capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
|
|
kfree(context.ret.pointer);
|
|
}
|
|
/* do we need to check other returned cap? Sounds no */
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Notification Handling
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_bus_check_device(acpi_handle handle)
|
|
{
|
|
struct acpi_device *device;
|
|
acpi_status status;
|
|
struct acpi_device_status old_status;
|
|
|
|
if (acpi_bus_get_device(handle, &device))
|
|
return;
|
|
if (!device)
|
|
return;
|
|
|
|
old_status = device->status;
|
|
|
|
/*
|
|
* Make sure this device's parent is present before we go about
|
|
* messing with the device.
|
|
*/
|
|
if (device->parent && !device->parent->status.present) {
|
|
device->status = device->parent->status;
|
|
return;
|
|
}
|
|
|
|
status = acpi_bus_get_status(device);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
|
|
return;
|
|
|
|
/*
|
|
* Device Insertion/Removal
|
|
*/
|
|
if ((device->status.present) && !(old_status.present)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
|
|
/* TBD: Handle device insertion */
|
|
} else if (!(device->status.present) && (old_status.present)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
|
|
/* TBD: Handle device removal */
|
|
}
|
|
}
|
|
|
|
static void acpi_bus_check_scope(acpi_handle handle)
|
|
{
|
|
/* Status Change? */
|
|
acpi_bus_check_device(handle);
|
|
|
|
/*
|
|
* TBD: Enumerate child devices within this device's scope and
|
|
* run acpi_bus_check_device()'s on them.
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* acpi_bus_notify
|
|
* ---------------
|
|
* Callback for all 'system-level' device notifications (values 0x00-0x7F).
|
|
*/
|
|
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_driver *driver;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
|
|
type, handle));
|
|
|
|
switch (type) {
|
|
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
acpi_bus_check_scope(handle);
|
|
/*
|
|
* TBD: We'll need to outsource certain events to non-ACPI
|
|
* drivers via the device manager (device.c).
|
|
*/
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
acpi_bus_check_device(handle);
|
|
/*
|
|
* TBD: We'll need to outsource certain events to non-ACPI
|
|
* drivers via the device manager (device.c).
|
|
*/
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_WAKE:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_EJECT_REQUEST:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
|
|
/* TBD: Exactly what does 'light' mean? */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
|
|
/* TBD */
|
|
break;
|
|
|
|
case ACPI_NOTIFY_POWER_FAULT:
|
|
/* TBD */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Received unknown/unsupported notification [%08x]\n",
|
|
type));
|
|
break;
|
|
}
|
|
|
|
acpi_bus_get_device(handle, &device);
|
|
if (device) {
|
|
driver = device->driver;
|
|
if (driver && driver->ops.notify &&
|
|
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
|
|
driver->ops.notify(device, type);
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Initialization/Cleanup
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int __init acpi_bus_init_irq(void)
|
|
{
|
|
acpi_status status;
|
|
char *message = NULL;
|
|
|
|
|
|
/*
|
|
* Let the system know what interrupt model we are using by
|
|
* evaluating the \_PIC object, if exists.
|
|
*/
|
|
|
|
switch (acpi_irq_model) {
|
|
case ACPI_IRQ_MODEL_PIC:
|
|
message = "PIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_IOAPIC:
|
|
message = "IOAPIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_IOSAPIC:
|
|
message = "IOSAPIC";
|
|
break;
|
|
case ACPI_IRQ_MODEL_PLATFORM:
|
|
message = "platform specific model";
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
|
|
|
|
status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
|
|
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8 acpi_gbl_permanent_mmap;
|
|
|
|
|
|
void __init acpi_early_init(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
|
|
|
|
/* enable workarounds, unless strict ACPI spec. compliance */
|
|
if (!acpi_strict)
|
|
acpi_gbl_enable_interpreter_slack = TRUE;
|
|
|
|
acpi_gbl_permanent_mmap = 1;
|
|
|
|
/*
|
|
* If the machine falls into the DMI check table,
|
|
* DSDT will be copied to memory
|
|
*/
|
|
dmi_check_system(dsdt_dmi_table);
|
|
|
|
status = acpi_reallocate_root_table();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to reallocate ACPI tables\n");
|
|
goto error0;
|
|
}
|
|
|
|
status = acpi_initialize_subsystem();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to initialize the ACPI Interpreter\n");
|
|
goto error0;
|
|
}
|
|
|
|
status = acpi_load_tables();
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to load the System Description Tables\n");
|
|
goto error0;
|
|
}
|
|
|
|
#ifdef CONFIG_X86
|
|
if (!acpi_ioapic) {
|
|
/* compatible (0) means level (3) */
|
|
if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
|
|
acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
|
|
acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
|
|
}
|
|
/* Set PIC-mode SCI trigger type */
|
|
acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
|
|
(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
|
|
} else {
|
|
/*
|
|
* now that acpi_gbl_FADT is initialized,
|
|
* update it with result from INT_SRC_OVR parsing
|
|
*/
|
|
acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
|
|
}
|
|
#endif
|
|
|
|
status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
|
|
goto error0;
|
|
}
|
|
|
|
return;
|
|
|
|
error0:
|
|
disable_acpi();
|
|
return;
|
|
}
|
|
|
|
static int __init acpi_bus_init(void)
|
|
{
|
|
int result;
|
|
acpi_status status;
|
|
|
|
acpi_os_initialize1();
|
|
|
|
status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to start the ACPI Interpreter\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* ACPI 2.0 requires the EC driver to be loaded and work before
|
|
* the EC device is found in the namespace (i.e. before acpi_initialize_objects()
|
|
* is called).
|
|
*
|
|
* This is accomplished by looking for the ECDT table, and getting
|
|
* the EC parameters out of that.
|
|
*/
|
|
status = acpi_ec_ecdt_probe();
|
|
/* Ignore result. Not having an ECDT is not fatal. */
|
|
|
|
status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* _OSC method may exist in module level code,
|
|
* so it must be run after ACPI_FULL_INITIALIZATION
|
|
*/
|
|
acpi_bus_osc_support();
|
|
|
|
/*
|
|
* _PDC control method may load dynamic SSDT tables,
|
|
* and we need to install the table handler before that.
|
|
*/
|
|
acpi_sysfs_init();
|
|
|
|
acpi_early_processor_set_pdc();
|
|
|
|
/*
|
|
* Maybe EC region is required at bus_scan/acpi_get_devices. So it
|
|
* is necessary to enable it as early as possible.
|
|
*/
|
|
acpi_boot_ec_enable();
|
|
|
|
printk(KERN_INFO PREFIX "Interpreter enabled\n");
|
|
|
|
/* Initialize sleep structures */
|
|
acpi_sleep_init();
|
|
|
|
/*
|
|
* Get the system interrupt model and evaluate \_PIC.
|
|
*/
|
|
result = acpi_bus_init_irq();
|
|
if (result)
|
|
goto error1;
|
|
|
|
/*
|
|
* Register the for all standard device notifications.
|
|
*/
|
|
status =
|
|
acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
|
|
&acpi_bus_notify, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Unable to register for device notifications\n");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* Create the top ACPI proc directory
|
|
*/
|
|
acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
|
|
|
|
return 0;
|
|
|
|
/* Mimic structured exception handling */
|
|
error1:
|
|
acpi_terminate();
|
|
return -ENODEV;
|
|
}
|
|
|
|
struct kobject *acpi_kobj;
|
|
EXPORT_SYMBOL_GPL(acpi_kobj);
|
|
|
|
static int __init acpi_init(void)
|
|
{
|
|
int result;
|
|
|
|
if (acpi_disabled) {
|
|
printk(KERN_INFO PREFIX "Interpreter disabled.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
|
|
if (!acpi_kobj) {
|
|
printk(KERN_WARNING "%s: kset create error\n", __func__);
|
|
acpi_kobj = NULL;
|
|
}
|
|
|
|
init_acpi_device_notify();
|
|
result = acpi_bus_init();
|
|
if (result) {
|
|
disable_acpi();
|
|
return result;
|
|
}
|
|
|
|
pci_mmcfg_late_init();
|
|
acpi_scan_init();
|
|
acpi_ec_init();
|
|
acpi_debugfs_init();
|
|
acpi_sleep_proc_init();
|
|
acpi_wakeup_device_init();
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(acpi_init);
|