8b48463f89
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
575 lines
14 KiB
C
575 lines
14 KiB
C
/*
|
|
* acpi_utils.c - ACPI Utility Functions ($Revision: 10 $)
|
|
*
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* 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/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/acpi.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#define _COMPONENT ACPI_BUS_COMPONENT
|
|
ACPI_MODULE_NAME("utils");
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Object Evaluation Helpers
|
|
-------------------------------------------------------------------------- */
|
|
static void
|
|
acpi_util_eval_error(acpi_handle h, acpi_string p, acpi_status s)
|
|
{
|
|
#ifdef ACPI_DEBUG_OUTPUT
|
|
char prefix[80] = {'\0'};
|
|
struct acpi_buffer buffer = {sizeof(prefix), prefix};
|
|
acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluate [%s.%s]: %s\n",
|
|
(char *) prefix, p, acpi_format_exception(s)));
|
|
#else
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
acpi_status
|
|
acpi_extract_package(union acpi_object *package,
|
|
struct acpi_buffer *format, struct acpi_buffer *buffer)
|
|
{
|
|
u32 size_required = 0;
|
|
u32 tail_offset = 0;
|
|
char *format_string = NULL;
|
|
u32 format_count = 0;
|
|
u32 i = 0;
|
|
u8 *head = NULL;
|
|
u8 *tail = NULL;
|
|
|
|
|
|
if (!package || (package->type != ACPI_TYPE_PACKAGE)
|
|
|| (package->package.count < 1)) {
|
|
printk(KERN_WARNING PREFIX "Invalid package argument\n");
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
|
|
if (!format || !format->pointer || (format->length < 1)) {
|
|
printk(KERN_WARNING PREFIX "Invalid format argument\n");
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
|
|
if (!buffer) {
|
|
printk(KERN_WARNING PREFIX "Invalid buffer argument\n");
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
|
|
format_count = (format->length / sizeof(char)) - 1;
|
|
if (format_count > package->package.count) {
|
|
printk(KERN_WARNING PREFIX "Format specifies more objects [%d]"
|
|
" than exist in package [%d].\n",
|
|
format_count, package->package.count);
|
|
return AE_BAD_DATA;
|
|
}
|
|
|
|
format_string = format->pointer;
|
|
|
|
/*
|
|
* Calculate size_required.
|
|
*/
|
|
for (i = 0; i < format_count; i++) {
|
|
|
|
union acpi_object *element = &(package->package.elements[i]);
|
|
|
|
if (!element) {
|
|
return AE_BAD_DATA;
|
|
}
|
|
|
|
switch (element->type) {
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
switch (format_string[i]) {
|
|
case 'N':
|
|
size_required += sizeof(u64);
|
|
tail_offset += sizeof(u64);
|
|
break;
|
|
case 'S':
|
|
size_required +=
|
|
sizeof(char *) + sizeof(u64) +
|
|
sizeof(char);
|
|
tail_offset += sizeof(char *);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING PREFIX "Invalid package element"
|
|
" [%d]: got number, expecting"
|
|
" [%c]\n",
|
|
i, format_string[i]);
|
|
return AE_BAD_DATA;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
switch (format_string[i]) {
|
|
case 'S':
|
|
size_required +=
|
|
sizeof(char *) +
|
|
(element->string.length * sizeof(char)) +
|
|
sizeof(char);
|
|
tail_offset += sizeof(char *);
|
|
break;
|
|
case 'B':
|
|
size_required +=
|
|
sizeof(u8 *) +
|
|
(element->buffer.length * sizeof(u8));
|
|
tail_offset += sizeof(u8 *);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING PREFIX "Invalid package element"
|
|
" [%d] got string/buffer,"
|
|
" expecting [%c]\n",
|
|
i, format_string[i]);
|
|
return AE_BAD_DATA;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Found unsupported element at index=%d\n",
|
|
i));
|
|
/* TBD: handle nested packages... */
|
|
return AE_SUPPORT;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Validate output buffer.
|
|
*/
|
|
if (buffer->length == ACPI_ALLOCATE_BUFFER) {
|
|
buffer->pointer = ACPI_ALLOCATE(size_required);
|
|
if (!buffer->pointer)
|
|
return AE_NO_MEMORY;
|
|
buffer->length = size_required;
|
|
memset(buffer->pointer, 0, size_required);
|
|
} else {
|
|
if (buffer->length < size_required) {
|
|
buffer->length = size_required;
|
|
return AE_BUFFER_OVERFLOW;
|
|
} else if (buffer->length != size_required ||
|
|
!buffer->pointer) {
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
}
|
|
|
|
head = buffer->pointer;
|
|
tail = buffer->pointer + tail_offset;
|
|
|
|
/*
|
|
* Extract package data.
|
|
*/
|
|
for (i = 0; i < format_count; i++) {
|
|
|
|
u8 **pointer = NULL;
|
|
union acpi_object *element = &(package->package.elements[i]);
|
|
|
|
if (!element) {
|
|
return AE_BAD_DATA;
|
|
}
|
|
|
|
switch (element->type) {
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
switch (format_string[i]) {
|
|
case 'N':
|
|
*((u64 *) head) =
|
|
element->integer.value;
|
|
head += sizeof(u64);
|
|
break;
|
|
case 'S':
|
|
pointer = (u8 **) head;
|
|
*pointer = tail;
|
|
*((u64 *) tail) =
|
|
element->integer.value;
|
|
head += sizeof(u64 *);
|
|
tail += sizeof(u64);
|
|
/* NULL terminate string */
|
|
*tail = (char)0;
|
|
tail += sizeof(char);
|
|
break;
|
|
default:
|
|
/* Should never get here */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
switch (format_string[i]) {
|
|
case 'S':
|
|
pointer = (u8 **) head;
|
|
*pointer = tail;
|
|
memcpy(tail, element->string.pointer,
|
|
element->string.length);
|
|
head += sizeof(char *);
|
|
tail += element->string.length * sizeof(char);
|
|
/* NULL terminate string */
|
|
*tail = (char)0;
|
|
tail += sizeof(char);
|
|
break;
|
|
case 'B':
|
|
pointer = (u8 **) head;
|
|
*pointer = tail;
|
|
memcpy(tail, element->buffer.pointer,
|
|
element->buffer.length);
|
|
head += sizeof(u8 *);
|
|
tail += element->buffer.length * sizeof(u8);
|
|
break;
|
|
default:
|
|
/* Should never get here */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
/* TBD: handle nested packages... */
|
|
default:
|
|
/* Should never get here */
|
|
break;
|
|
}
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_extract_package);
|
|
|
|
acpi_status
|
|
acpi_evaluate_integer(acpi_handle handle,
|
|
acpi_string pathname,
|
|
struct acpi_object_list *arguments, unsigned long long *data)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_object element;
|
|
struct acpi_buffer buffer = { 0, NULL };
|
|
|
|
if (!data)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
buffer.length = sizeof(union acpi_object);
|
|
buffer.pointer = &element;
|
|
status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_util_eval_error(handle, pathname, status);
|
|
return status;
|
|
}
|
|
|
|
if (element.type != ACPI_TYPE_INTEGER) {
|
|
acpi_util_eval_error(handle, pathname, AE_BAD_DATA);
|
|
return AE_BAD_DATA;
|
|
}
|
|
|
|
*data = element.integer.value;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%llu]\n", *data));
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_evaluate_integer);
|
|
|
|
acpi_status
|
|
acpi_evaluate_reference(acpi_handle handle,
|
|
acpi_string pathname,
|
|
struct acpi_object_list *arguments,
|
|
struct acpi_handle_list *list)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_object *package = NULL;
|
|
union acpi_object *element = NULL;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
u32 i = 0;
|
|
|
|
|
|
if (!list) {
|
|
return AE_BAD_PARAMETER;
|
|
}
|
|
|
|
/* Evaluate object. */
|
|
|
|
status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
|
|
if (ACPI_FAILURE(status))
|
|
goto end;
|
|
|
|
package = buffer.pointer;
|
|
|
|
if ((buffer.length == 0) || !package) {
|
|
printk(KERN_ERR PREFIX "No return object (len %X ptr %p)\n",
|
|
(unsigned)buffer.length, package);
|
|
status = AE_BAD_DATA;
|
|
acpi_util_eval_error(handle, pathname, status);
|
|
goto end;
|
|
}
|
|
if (package->type != ACPI_TYPE_PACKAGE) {
|
|
printk(KERN_ERR PREFIX "Expecting a [Package], found type %X\n",
|
|
package->type);
|
|
status = AE_BAD_DATA;
|
|
acpi_util_eval_error(handle, pathname, status);
|
|
goto end;
|
|
}
|
|
if (!package->package.count) {
|
|
printk(KERN_ERR PREFIX "[Package] has zero elements (%p)\n",
|
|
package);
|
|
status = AE_BAD_DATA;
|
|
acpi_util_eval_error(handle, pathname, status);
|
|
goto end;
|
|
}
|
|
|
|
if (package->package.count > ACPI_MAX_HANDLES) {
|
|
return AE_NO_MEMORY;
|
|
}
|
|
list->count = package->package.count;
|
|
|
|
/* Extract package data. */
|
|
|
|
for (i = 0; i < list->count; i++) {
|
|
|
|
element = &(package->package.elements[i]);
|
|
|
|
if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
|
|
status = AE_BAD_DATA;
|
|
printk(KERN_ERR PREFIX
|
|
"Expecting a [Reference] package element, found type %X\n",
|
|
element->type);
|
|
acpi_util_eval_error(handle, pathname, status);
|
|
break;
|
|
}
|
|
|
|
if (!element->reference.handle) {
|
|
printk(KERN_WARNING PREFIX "Invalid reference in"
|
|
" package %s\n", pathname);
|
|
status = AE_NULL_ENTRY;
|
|
break;
|
|
}
|
|
/* Get the acpi_handle. */
|
|
|
|
list->handles[i] = element->reference.handle;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found reference [%p]\n",
|
|
list->handles[i]));
|
|
}
|
|
|
|
end:
|
|
if (ACPI_FAILURE(status)) {
|
|
list->count = 0;
|
|
//kfree(list->handles);
|
|
}
|
|
|
|
kfree(buffer.pointer);
|
|
|
|
return status;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_evaluate_reference);
|
|
|
|
acpi_status
|
|
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *output;
|
|
|
|
status = acpi_evaluate_object(handle, "_PLD", NULL, &buffer);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
|
|
output = buffer.pointer;
|
|
|
|
if (!output || output->type != ACPI_TYPE_PACKAGE
|
|
|| !output->package.count
|
|
|| output->package.elements[0].type != ACPI_TYPE_BUFFER
|
|
|| output->package.elements[0].buffer.length < ACPI_PLD_REV1_BUFFER_SIZE) {
|
|
status = AE_TYPE;
|
|
goto out;
|
|
}
|
|
|
|
status = acpi_decode_pld_buffer(
|
|
output->package.elements[0].buffer.pointer,
|
|
output->package.elements[0].buffer.length,
|
|
pld);
|
|
|
|
out:
|
|
kfree(buffer.pointer);
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_physical_device_location);
|
|
|
|
/**
|
|
* acpi_evaluate_hotplug_ost: Evaluate _OST for hotplug operations
|
|
* @handle: ACPI device handle
|
|
* @source_event: source event code
|
|
* @status_code: status code
|
|
* @status_buf: optional detailed information (NULL if none)
|
|
*
|
|
* Evaluate _OST for hotplug operations. All ACPI hotplug handlers
|
|
* must call this function when evaluating _OST for hotplug operations.
|
|
* When the platform does not support _OST, this function has no effect.
|
|
*/
|
|
acpi_status
|
|
acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
|
|
u32 status_code, struct acpi_buffer *status_buf)
|
|
{
|
|
#ifdef ACPI_HOTPLUG_OST
|
|
union acpi_object params[3] = {
|
|
{.type = ACPI_TYPE_INTEGER,},
|
|
{.type = ACPI_TYPE_INTEGER,},
|
|
{.type = ACPI_TYPE_BUFFER,}
|
|
};
|
|
struct acpi_object_list arg_list = {3, params};
|
|
acpi_status status;
|
|
|
|
params[0].integer.value = source_event;
|
|
params[1].integer.value = status_code;
|
|
if (status_buf != NULL) {
|
|
params[2].buffer.pointer = status_buf->pointer;
|
|
params[2].buffer.length = status_buf->length;
|
|
} else {
|
|
params[2].buffer.pointer = NULL;
|
|
params[2].buffer.length = 0;
|
|
}
|
|
|
|
status = acpi_evaluate_object(handle, "_OST", &arg_list, NULL);
|
|
return status;
|
|
#else
|
|
return AE_OK;
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(acpi_evaluate_hotplug_ost);
|
|
|
|
/**
|
|
* acpi_handle_printk: Print message with ACPI prefix and object path
|
|
*
|
|
* This function is called through acpi_handle_<level> macros and prints
|
|
* a message with ACPI prefix and object path. This function acquires
|
|
* the global namespace mutex to obtain an object path. In interrupt
|
|
* context, it shows the object path as <n/a>.
|
|
*/
|
|
void
|
|
acpi_handle_printk(const char *level, acpi_handle handle, const char *fmt, ...)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
struct acpi_buffer buffer = {
|
|
.length = ACPI_ALLOCATE_BUFFER,
|
|
.pointer = NULL
|
|
};
|
|
const char *path;
|
|
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
|
|
if (in_interrupt() ||
|
|
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer) != AE_OK)
|
|
path = "<n/a>";
|
|
else
|
|
path = buffer.pointer;
|
|
|
|
printk("%sACPI: %s: %pV", level, path, &vaf);
|
|
|
|
va_end(args);
|
|
kfree(buffer.pointer);
|
|
}
|
|
EXPORT_SYMBOL(acpi_handle_printk);
|
|
|
|
/**
|
|
* acpi_has_method: Check whether @handle has a method named @name
|
|
* @handle: ACPI device handle
|
|
* @name: name of object or method
|
|
*
|
|
* Check whether @handle has a method named @name.
|
|
*/
|
|
bool acpi_has_method(acpi_handle handle, char *name)
|
|
{
|
|
acpi_handle tmp;
|
|
|
|
return ACPI_SUCCESS(acpi_get_handle(handle, name, &tmp));
|
|
}
|
|
EXPORT_SYMBOL(acpi_has_method);
|
|
|
|
acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
|
|
u64 arg)
|
|
{
|
|
union acpi_object obj = { .type = ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list arg_list = { .count = 1, .pointer = &obj, };
|
|
|
|
obj.integer.value = arg;
|
|
|
|
return acpi_evaluate_object(handle, method, &arg_list, NULL);
|
|
}
|
|
EXPORT_SYMBOL(acpi_execute_simple_method);
|
|
|
|
/**
|
|
* acpi_evaluate_ej0: Evaluate _EJ0 method for hotplug operations
|
|
* @handle: ACPI device handle
|
|
*
|
|
* Evaluate device's _EJ0 method for hotplug operations.
|
|
*/
|
|
acpi_status acpi_evaluate_ej0(acpi_handle handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
status = acpi_execute_simple_method(handle, "_EJ0", 1);
|
|
if (status == AE_NOT_FOUND)
|
|
acpi_handle_warn(handle, "No _EJ0 support for device\n");
|
|
else if (ACPI_FAILURE(status))
|
|
acpi_handle_warn(handle, "Eject failed (0x%x)\n", status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* acpi_evaluate_lck: Evaluate _LCK method to lock/unlock device
|
|
* @handle: ACPI device handle
|
|
* @lock: lock device if non-zero, otherwise unlock device
|
|
*
|
|
* Evaluate device's _LCK method if present to lock/unlock device
|
|
*/
|
|
acpi_status acpi_evaluate_lck(acpi_handle handle, int lock)
|
|
{
|
|
acpi_status status;
|
|
|
|
status = acpi_execute_simple_method(handle, "_LCK", !!lock);
|
|
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
|
if (lock)
|
|
acpi_handle_warn(handle,
|
|
"Locking device failed (0x%x)\n", status);
|
|
else
|
|
acpi_handle_warn(handle,
|
|
"Unlocking device failed (0x%x)\n", status);
|
|
}
|
|
|
|
return status;
|
|
}
|