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linux/drivers/acpi/acpica/rsutils.c
Bob Moore a8357b0c95 ACPICA: Update all ACPICA copyrights and signons to 2010 
Add 2010 copyright to all module headers and signons, including
the Linux header. This affects virtually every file in the ACPICA
core subsystem, iASL compiler, and all utilities.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-01-22 12:30:05 -05:00

728 lines
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/*******************************************************************************
*
* Module Name: rsutils - Utilities for the resource manager
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2010, Intel Corp.
* 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 <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acresrc.h"
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME("rsutils")
/*******************************************************************************
*
* FUNCTION: acpi_rs_decode_bitmask
*
* PARAMETERS: Mask - Bitmask to decode
* List - Where the converted list is returned
*
* RETURN: Count of bits set (length of list)
*
* DESCRIPTION: Convert a bit mask into a list of values
*
******************************************************************************/
u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
{
u8 i;
u8 bit_count;
ACPI_FUNCTION_ENTRY();
/* Decode the mask bits */
for (i = 0, bit_count = 0; mask; i++) {
if (mask & 0x0001) {
list[bit_count] = i;
bit_count++;
}
mask >>= 1;
}
return (bit_count);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_encode_bitmask
*
* PARAMETERS: List - List of values to encode
* Count - Length of list
*
* RETURN: Encoded bitmask
*
* DESCRIPTION: Convert a list of values to an encoded bitmask
*
******************************************************************************/
u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
{
u32 i;
u16 mask;
ACPI_FUNCTION_ENTRY();
/* Encode the list into a single bitmask */
for (i = 0, mask = 0; i < count; i++) {
mask |= (0x1 << list[i]);
}
return mask;
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_move_data
*
* PARAMETERS: Destination - Pointer to the destination descriptor
* Source - Pointer to the source descriptor
* item_count - How many items to move
* move_type - Byte width
*
* RETURN: None
*
* DESCRIPTION: Move multiple data items from one descriptor to another. Handles
* alignment issues and endian issues if necessary, as configured
* via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
*
******************************************************************************/
void
acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
{
u32 i;
ACPI_FUNCTION_ENTRY();
/* One move per item */
for (i = 0; i < item_count; i++) {
switch (move_type) {
/*
* For the 8-bit case, we can perform the move all at once
* since there are no alignment or endian issues
*/
case ACPI_RSC_MOVE8:
ACPI_MEMCPY(destination, source, item_count);
return;
/*
* 16-, 32-, and 64-bit cases must use the move macros that perform
* endian conversion and/or accomodate hardware that cannot perform
* misaligned memory transfers
*/
case ACPI_RSC_MOVE16:
ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
&ACPI_CAST_PTR(u16, source)[i]);
break;
case ACPI_RSC_MOVE32:
ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
&ACPI_CAST_PTR(u32, source)[i]);
break;
case ACPI_RSC_MOVE64:
ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
&ACPI_CAST_PTR(u64, source)[i]);
break;
default:
return;
}
}
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_resource_length
*
* PARAMETERS: total_length - Length of the AML descriptor, including
* the header and length fields.
* Aml - Pointer to the raw AML descriptor
*
* RETURN: None
*
* DESCRIPTION: Set the resource_length field of an AML
* resource descriptor, both Large and Small descriptors are
* supported automatically. Note: Descriptor Type field must
* be valid.
*
******************************************************************************/
void
acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
union aml_resource *aml)
{
acpi_rs_length resource_length;
ACPI_FUNCTION_ENTRY();
/* Length is the total descriptor length minus the header length */
resource_length = (acpi_rs_length)
(total_length - acpi_ut_get_resource_header_length(aml));
/* Length is stored differently for large and small descriptors */
if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
/* Large descriptor -- bytes 1-2 contain the 16-bit length */
ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
&resource_length);
} else {
/* Small descriptor -- bits 2:0 of byte 0 contain the length */
aml->small_header.descriptor_type = (u8)
/* Clear any existing length, preserving descriptor type bits */
((aml->small_header.
descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
| resource_length);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_resource_header
*
* PARAMETERS: descriptor_type - Byte to be inserted as the type
* total_length - Length of the AML descriptor, including
* the header and length fields.
* Aml - Pointer to the raw AML descriptor
*
* RETURN: None
*
* DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
* resource descriptor, both Large and Small descriptors are
* supported automatically
*
******************************************************************************/
void
acpi_rs_set_resource_header(u8 descriptor_type,
acpi_rsdesc_size total_length,
union aml_resource *aml)
{
ACPI_FUNCTION_ENTRY();
/* Set the Resource Type */
aml->small_header.descriptor_type = descriptor_type;
/* Set the Resource Length */
acpi_rs_set_resource_length(total_length, aml);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_strcpy
*
* PARAMETERS: Destination - Pointer to the destination string
* Source - Pointer to the source string
*
* RETURN: String length, including NULL terminator
*
* DESCRIPTION: Local string copy that returns the string length, saving a
* strcpy followed by a strlen.
*
******************************************************************************/
static u16 acpi_rs_strcpy(char *destination, char *source)
{
u16 i;
ACPI_FUNCTION_ENTRY();
for (i = 0; source[i]; i++) {
destination[i] = source[i];
}
destination[i] = 0;
/* Return string length including the NULL terminator */
return ((u16) (i + 1));
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_resource_source
*
* PARAMETERS: resource_length - Length field of the descriptor
* minimum_length - Minimum length of the descriptor (minus
* any optional fields)
* resource_source - Where the resource_source is returned
* Aml - Pointer to the raw AML descriptor
* string_ptr - (optional) where to store the actual
* resource_source string
*
* RETURN: Length of the string plus NULL terminator, rounded up to native
* word boundary
*
* DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
* to an internal resource descriptor
*
******************************************************************************/
acpi_rs_length
acpi_rs_get_resource_source(acpi_rs_length resource_length,
acpi_rs_length minimum_length,
struct acpi_resource_source * resource_source,
union aml_resource * aml, char *string_ptr)
{
acpi_rsdesc_size total_length;
u8 *aml_resource_source;
ACPI_FUNCTION_ENTRY();
total_length =
resource_length + sizeof(struct aml_resource_large_header);
aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
/*
* resource_source is present if the length of the descriptor is longer than
* the minimum length.
*
* Note: Some resource descriptors will have an additional null, so
* we add 1 to the minimum length.
*/
if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) {
/* Get the resource_source_index */
resource_source->index = aml_resource_source[0];
resource_source->string_ptr = string_ptr;
if (!string_ptr) {
/*
* String destination pointer is not specified; Set the String
* pointer to the end of the current resource_source structure.
*/
resource_source->string_ptr =
ACPI_ADD_PTR(char, resource_source,
sizeof(struct acpi_resource_source));
}
/*
* In order for the Resource length to be a multiple of the native
* word, calculate the length of the string (+1 for NULL terminator)
* and expand to the next word multiple.
*
* Zero the entire area of the buffer.
*/
total_length = (u32)
ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + 1;
total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
/* Copy the resource_source string to the destination */
resource_source->string_length =
acpi_rs_strcpy(resource_source->string_ptr,
ACPI_CAST_PTR(char,
&aml_resource_source[1]));
return ((acpi_rs_length) total_length);
}
/* resource_source is not present */
resource_source->index = 0;
resource_source->string_length = 0;
resource_source->string_ptr = NULL;
return (0);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_resource_source
*
* PARAMETERS: Aml - Pointer to the raw AML descriptor
* minimum_length - Minimum length of the descriptor (minus
* any optional fields)
* resource_source - Internal resource_source
*
* RETURN: Total length of the AML descriptor
*
* DESCRIPTION: Convert an optional resource_source from internal format to a
* raw AML resource descriptor
*
******************************************************************************/
acpi_rsdesc_size
acpi_rs_set_resource_source(union aml_resource * aml,
acpi_rs_length minimum_length,
struct acpi_resource_source * resource_source)
{
u8 *aml_resource_source;
acpi_rsdesc_size descriptor_length;
ACPI_FUNCTION_ENTRY();
descriptor_length = minimum_length;
/* Non-zero string length indicates presence of a resource_source */
if (resource_source->string_length) {
/* Point to the end of the AML descriptor */
aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
/* Copy the resource_source_index */
aml_resource_source[0] = (u8) resource_source->index;
/* Copy the resource_source string */
ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
resource_source->string_ptr);
/*
* Add the length of the string (+ 1 for null terminator) to the
* final descriptor length
*/
descriptor_length +=
((acpi_rsdesc_size) resource_source->string_length + 1);
}
/* Return the new total length of the AML descriptor */
return (descriptor_length);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_prt_method_data
*
* PARAMETERS: Node - Device node
* ret_buffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _PRT value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
acpi_status
acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,
struct acpi_buffer * ret_buffer)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_get_prt_method_data);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
ACPI_BTYPE_PACKAGE, &obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Create a resource linked list from the byte stream buffer that comes
* back from the _CRS method execution.
*/
status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
/* On exit, we must delete the object returned by evaluate_object */
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_crs_method_data
*
* PARAMETERS: Node - Device node
* ret_buffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _CRS value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
acpi_status
acpi_rs_get_crs_method_data(struct acpi_namespace_node *node,
struct acpi_buffer *ret_buffer)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_get_crs_method_data);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
ACPI_BTYPE_BUFFER, &obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the _CRS method
* execution.
*/
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
/* On exit, we must delete the object returned by evaluate_object */
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_prs_method_data
*
* PARAMETERS: Node - Device node
* ret_buffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _PRS value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
struct acpi_buffer *ret_buffer)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
ACPI_BTYPE_BUFFER, &obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the _CRS method
* execution.
*/
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
/* On exit, we must delete the object returned by evaluate_object */
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_method_data
*
* PARAMETERS: Handle - Handle to the containing object
* Path - Path to method, relative to Handle
* ret_buffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _CRS or _PRS value of an
* object contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
acpi_status
acpi_rs_get_method_data(acpi_handle handle,
char *path, struct acpi_buffer *ret_buffer)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE(rs_get_method_data);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
status =
acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the method
* execution.
*/
status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
/* On exit, we must delete the object returned by evaluate_object */
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_set_srs_method_data
*
* PARAMETERS: Node - Device node
* in_buffer - Pointer to a buffer structure of the
* parameter
*
* RETURN: Status
*
* DESCRIPTION: This function is called to set the _SRS of an object contained
* in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
* Note: Parameters guaranteed valid by caller
*
******************************************************************************/
acpi_status
acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
struct acpi_buffer *in_buffer)
{
struct acpi_evaluate_info *info;
union acpi_operand_object *args[2];
acpi_status status;
struct acpi_buffer buffer;
ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
/* Allocate and initialize the evaluation information block */
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
if (!info) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
info->prefix_node = node;
info->pathname = METHOD_NAME__SRS;
info->parameters = args;
info->flags = ACPI_IGNORE_RETURN_VALUE;
/*
* The in_buffer parameter will point to a linked list of
* resource parameters. It needs to be formatted into a
* byte stream to be sent in as an input parameter to _SRS
*
* Convert the linked list into a byte stream
*/
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/* Create and initialize the method parameter object */
args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
if (!args[0]) {
/*
* Must free the buffer allocated above (otherwise it is freed
* later)
*/
ACPI_FREE(buffer.pointer);
status = AE_NO_MEMORY;
goto cleanup;
}
args[0]->buffer.length = (u32) buffer.length;
args[0]->buffer.pointer = buffer.pointer;
args[0]->common.flags = AOPOBJ_DATA_VALID;
args[1] = NULL;
/* Execute the method, no return value is expected */
status = acpi_ns_evaluate(info);
/* Clean up and return the status from acpi_ns_evaluate */
acpi_ut_remove_reference(args[0]);
cleanup:
ACPI_FREE(info);
return_ACPI_STATUS(status);
}
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