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linux/drivers/acpi/resources/rsxface.c

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/*******************************************************************************
*
* Module Name: rsxface - Public interfaces to the resource manager
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <linux/module.h>
#include <acpi/acpi.h>
#include <acpi/acresrc.h>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rsxface")
/*******************************************************************************
*
* FUNCTION: acpi_get_irq_routing_table
*
* PARAMETERS: device_handle - a handle to the Bus device we are querying
* ret_buffer - a pointer to a buffer to receive the
* current resources for the device
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the IRQ routing table for a
* specific bus. The caller must first acquire a handle for the
* desired bus. The routine table is placed in the buffer pointed
* to by the ret_buffer variable parameter.
*
* If the function fails an appropriate status will be returned
* and the value of ret_buffer is undefined.
*
* This function attempts to execute the _PRT method contained in
* the object indicated by the passed device_handle.
*
******************************************************************************/
acpi_status
acpi_get_irq_routing_table (
acpi_handle device_handle,
struct acpi_buffer *ret_buffer)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_get_irq_routing_table ");
/*
* Must have a valid handle and buffer, So we have to have a handle
* and a return buffer structure, and if there is a non-zero buffer length
* we also need a valid pointer in the buffer. If it's a zero buffer length,
* we'll be returning the needed buffer size, so keep going.
*/
if (!device_handle) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_validate_buffer (ret_buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_rs_get_prt_method_data (device_handle, ret_buffer);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_current_resources
*
* PARAMETERS: device_handle - a handle to the device object for the
* device we are querying
* ret_buffer - a pointer to a buffer to receive the
* current resources for the device
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the current resources for a
* specific device. The caller must first acquire a handle for
* the desired device. The resource data is placed in the buffer
* pointed to by the ret_buffer variable parameter.
*
* If the function fails an appropriate status will be returned
* and the value of ret_buffer is undefined.
*
* This function attempts to execute the _CRS method contained in
* the object indicated by the passed device_handle.
*
******************************************************************************/
acpi_status
acpi_get_current_resources (
acpi_handle device_handle,
struct acpi_buffer *ret_buffer)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_get_current_resources");
/*
* Must have a valid handle and buffer, So we have to have a handle
* and a return buffer structure, and if there is a non-zero buffer length
* we also need a valid pointer in the buffer. If it's a zero buffer length,
* we'll be returning the needed buffer size, so keep going.
*/
if (!device_handle) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_validate_buffer (ret_buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_rs_get_crs_method_data (device_handle, ret_buffer);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_get_current_resources);
/*******************************************************************************
*
* FUNCTION: acpi_get_possible_resources
*
* PARAMETERS: device_handle - a handle to the device object for the
* device we are querying
* ret_buffer - a pointer to a buffer to receive the
* resources for the device
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get a list of the possible resources
* for a specific device. The caller must first acquire a handle
* for the desired device. The resource data is placed in the
* buffer pointed to by the ret_buffer variable.
*
* If the function fails an appropriate status will be returned
* and the value of ret_buffer is undefined.
*
******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_possible_resources (
acpi_handle device_handle,
struct acpi_buffer *ret_buffer)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_get_possible_resources");
/*
* Must have a valid handle and buffer, So we have to have a handle
* and a return buffer structure, and if there is a non-zero buffer length
* we also need a valid pointer in the buffer. If it's a zero buffer length,
* we'll be returning the needed buffer size, so keep going.
*/
if (!device_handle) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_ut_validate_buffer (ret_buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_rs_get_prs_method_data (device_handle, ret_buffer);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_get_possible_resources);
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_walk_resources
*
* PARAMETERS: device_handle - a handle to the device object for the
* device we are querying
* Path - method name of the resources we want
* (METHOD_NAME__CRS or METHOD_NAME__PRS)
* user_function - called for each resource
* Context - passed to user_function
*
* RETURN: Status
*
* DESCRIPTION: Retrieves the current or possible resource list for the
* specified device. The user_function is called once for
* each resource in the list.
*
******************************************************************************/
acpi_status
acpi_walk_resources (
acpi_handle device_handle,
char *path,
ACPI_WALK_RESOURCE_CALLBACK user_function,
void *context)
{
acpi_status status;
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *resource;
struct acpi_resource *buffer_end;
ACPI_FUNCTION_TRACE ("acpi_walk_resources");
if (!device_handle ||
(ACPI_STRNCMP (path, METHOD_NAME__CRS, sizeof (METHOD_NAME__CRS)) &&
ACPI_STRNCMP (path, METHOD_NAME__PRS, sizeof (METHOD_NAME__PRS)))) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_rs_get_method_data (device_handle, path, &buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Setup pointers */
resource = (struct acpi_resource *) buffer.pointer;
buffer_end = ACPI_CAST_PTR (struct acpi_resource,
((u8 *) buffer.pointer + buffer.length));
/* Walk the resource list */
for (;;) {
if (!resource || resource->id == ACPI_RSTYPE_END_TAG) {
break;
}
status = user_function (resource, context);
switch (status) {
case AE_OK:
case AE_CTRL_DEPTH:
/* Just keep going */
status = AE_OK;
break;
case AE_CTRL_TERMINATE:
/* Exit now, with OK stats */
status = AE_OK;
goto cleanup;
default:
/* All others are valid exceptions */
goto cleanup;
}
/* Get the next resource descriptor */
resource = ACPI_NEXT_RESOURCE (resource);
/* Check for end-of-buffer */
if (resource >= buffer_end) {
goto cleanup;
}
}
cleanup:
acpi_os_free (buffer.pointer);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_walk_resources);
/*******************************************************************************
*
* FUNCTION: acpi_set_current_resources
*
* PARAMETERS: device_handle - a handle to the device object for the
* device we are changing the resources of
* in_buffer - a pointer to a buffer containing the
* resources to be set for the device
*
* RETURN: Status
*
* DESCRIPTION: This function is called to set the current resources for a
* specific device. The caller must first acquire a handle for
* the desired device. The resource data is passed to the routine
* the buffer pointed to by the in_buffer variable.
*
******************************************************************************/
acpi_status
acpi_set_current_resources (
acpi_handle device_handle,
struct acpi_buffer *in_buffer)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("acpi_set_current_resources");
/*
* Must have a valid handle and buffer
*/
if ((!device_handle) ||
(!in_buffer) ||
(!in_buffer->pointer) ||
(!in_buffer->length)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_rs_set_srs_method_data (device_handle, in_buffer);
return_ACPI_STATUS (status);
}
EXPORT_SYMBOL(acpi_set_current_resources);
#define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field)
#define ACPI_COPY_ADDRESS(out, in) \
ACPI_COPY_FIELD(out, in, resource_type); \
ACPI_COPY_FIELD(out, in, producer_consumer); \
ACPI_COPY_FIELD(out, in, decode); \
ACPI_COPY_FIELD(out, in, min_address_fixed); \
ACPI_COPY_FIELD(out, in, max_address_fixed); \
ACPI_COPY_FIELD(out, in, attribute); \
ACPI_COPY_FIELD(out, in, granularity); \
ACPI_COPY_FIELD(out, in, min_address_range); \
ACPI_COPY_FIELD(out, in, max_address_range); \
ACPI_COPY_FIELD(out, in, address_translation_offset); \
ACPI_COPY_FIELD(out, in, address_length); \
ACPI_COPY_FIELD(out, in, resource_source);
/******************************************************************************
*
* FUNCTION: acpi_resource_to_address64
*
* PARAMETERS: resource - Pointer to a resource
* out - Pointer to the users's return
* buffer (a struct
* struct acpi_resource_address64)
*
* RETURN: Status
*
* DESCRIPTION: If the resource is an address16, address32, or address64,
* copy it to the address64 return buffer. This saves the
* caller from having to duplicate code for different-sized
* addresses.
*
******************************************************************************/
acpi_status
acpi_resource_to_address64 (
struct acpi_resource *resource,
struct acpi_resource_address64 *out)
{
struct acpi_resource_address16 *address16;
struct acpi_resource_address32 *address32;
switch (resource->id) {
case ACPI_RSTYPE_ADDRESS16:
address16 = (struct acpi_resource_address16 *) &resource->data;
ACPI_COPY_ADDRESS(out, address16);
break;
case ACPI_RSTYPE_ADDRESS32:
address32 = (struct acpi_resource_address32 *) &resource->data;
ACPI_COPY_ADDRESS(out, address32);
break;
case ACPI_RSTYPE_ADDRESS64:
/* Simple copy for 64 bit source */
ACPI_MEMCPY (out, &resource->data, sizeof (struct acpi_resource_address64));
break;
default:
return (AE_BAD_PARAMETER);
}
return (AE_OK);
}
EXPORT_SYMBOL(acpi_resource_to_address64);
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