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original_kernel/drivers/acpi/resources/rscreate.c

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/*******************************************************************************
*
* Module Name: rscreate - Create resource lists/tables
*
******************************************************************************/
/*
* 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 <acpi/acpi.h>
#include <acpi/acresrc.h>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rscreate")
/*******************************************************************************
*
* FUNCTION: acpi_rs_create_resource_list
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
* output_buffer - Pointer to the user's buffer
*
* RETURN: Status - AE_OK if okay, else a valid acpi_status code
* If output_buffer is not large enough, output_buffer_length
* indicates how large output_buffer should be, else it
* indicates how may u8 elements of output_buffer are valid.
*
* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
* execution and parses the stream to create a linked list
* of device resources.
*
******************************************************************************/
acpi_status
acpi_rs_create_resource_list (
union acpi_operand_object *byte_stream_buffer,
struct acpi_buffer *output_buffer)
{
acpi_status status;
u8 *byte_stream_start;
acpi_size list_size_needed = 0;
u32 byte_stream_buffer_length;
ACPI_FUNCTION_TRACE ("rs_create_resource_list");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_buffer = %p\n",
byte_stream_buffer));
/*
* Params already validated, so we don't re-validate here
*/
byte_stream_buffer_length = byte_stream_buffer->buffer.length;
byte_stream_start = byte_stream_buffer->buffer.pointer;
/*
* Pass the byte_stream_buffer into a module that can calculate
* the buffer size needed for the linked list
*/
status = acpi_rs_get_list_length (byte_stream_start, byte_stream_buffer_length,
&list_size_needed);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
status, (u32) list_size_needed));
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Validate/Allocate/Clear caller buffer */
status = acpi_ut_initialize_buffer (output_buffer, list_size_needed);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Do the conversion */
status = acpi_rs_byte_stream_to_list (byte_stream_start, byte_stream_buffer_length,
output_buffer->pointer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
output_buffer->pointer, (u32) output_buffer->length));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_create_pci_routing_table
*
* PARAMETERS: package_object - Pointer to an union acpi_operand_object
* package
* output_buffer - Pointer to the user's buffer
*
* RETURN: Status AE_OK if okay, else a valid acpi_status code.
* If the output_buffer is too small, the error will be
* AE_BUFFER_OVERFLOW and output_buffer->Length will point
* to the size buffer needed.
*
* DESCRIPTION: Takes the union acpi_operand_object package and creates a
* linked list of PCI interrupt descriptions
*
* NOTE: It is the caller's responsibility to ensure that the start of the
* output buffer is aligned properly (if necessary).
*
******************************************************************************/
acpi_status
acpi_rs_create_pci_routing_table (
union acpi_operand_object *package_object,
struct acpi_buffer *output_buffer)
{
u8 *buffer;
union acpi_operand_object **top_object_list;
union acpi_operand_object **sub_object_list;
union acpi_operand_object *obj_desc;
acpi_size buffer_size_needed = 0;
u32 number_of_elements;
u32 index;
struct acpi_pci_routing_table *user_prt;
struct acpi_namespace_node *node;
acpi_status status;
struct acpi_buffer path_buffer;
ACPI_FUNCTION_TRACE ("rs_create_pci_routing_table");
/* Params already validated, so we don't re-validate here */
/*
* Get the required buffer length
*/
status = acpi_rs_get_pci_routing_table_length (package_object,
&buffer_size_needed);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "buffer_size_needed = %X\n",
(u32) buffer_size_needed));
/* Validate/Allocate/Clear caller buffer */
status = acpi_ut_initialize_buffer (output_buffer, buffer_size_needed);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* Loop through the ACPI_INTERNAL_OBJECTS - Each object
* should be a package that in turn contains an
* acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
*/
top_object_list = package_object->package.elements;
number_of_elements = package_object->package.count;
buffer = output_buffer->pointer;
user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
for (index = 0; index < number_of_elements; index++) {
/*
* Point user_prt past this current structure
*
* NOTE: On the first iteration, user_prt->Length will
* be zero because we cleared the return buffer earlier
*/
buffer += user_prt->length;
user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
/*
* Fill in the Length field with the information we have at this point.
* The minus four is to subtract the size of the u8 Source[4] member
* because it is added below.
*/
user_prt->length = (sizeof (struct acpi_pci_routing_table) - 4);
/*
* Each element of the top-level package must also be a package
*/
if (ACPI_GET_OBJECT_TYPE (*top_object_list) != ACPI_TYPE_PACKAGE) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X]) Need sub-package, found %s\n",
index, acpi_ut_get_object_type_name (*top_object_list)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Each sub-package must be of length 4 */
if ((*top_object_list)->package.count != 4) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X]) Need package of length 4, found length %d\n",
index, (*top_object_list)->package.count));
return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
}
/*
* Dereference the sub-package.
* The sub_object_list will now point to an array of the four IRQ
* elements: [Address, Pin, Source, source_index]
*/
sub_object_list = (*top_object_list)->package.elements;
/*
* 1) First subobject: Dereference the PRT.Address
*/
obj_desc = sub_object_list[0];
if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->address = obj_desc->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X].Address) Need Integer, found %s\n",
index, acpi_ut_get_object_type_name (obj_desc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* 2) Second subobject: Dereference the PRT.Pin
*/
obj_desc = sub_object_list[1];
if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->pin = (u32) obj_desc->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X].Pin) Need Integer, found %s\n",
index, acpi_ut_get_object_type_name (obj_desc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* 3) Third subobject: Dereference the PRT.source_name
*/
obj_desc = sub_object_list[2];
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_LOCAL_REFERENCE:
if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X].Source) Need name, found reference op %X\n",
index, obj_desc->reference.opcode));
return_ACPI_STATUS (AE_BAD_DATA);
}
node = obj_desc->reference.node;
/* Use *remaining* length of the buffer as max for pathname */
path_buffer.length = output_buffer->length -
(u32) ((u8 *) user_prt->source -
(u8 *) output_buffer->pointer);
path_buffer.pointer = user_prt->source;
status = acpi_ns_handle_to_pathname ((acpi_handle) node, &path_buffer);
user_prt->length += (u32) ACPI_STRLEN (user_prt->source) + 1; /* include null terminator */
break;
case ACPI_TYPE_STRING:
ACPI_STRCPY (user_prt->source, obj_desc->string.pointer);
/* Add to the Length field the length of the string (add 1 for terminator) */
user_prt->length += obj_desc->string.length + 1;
break;
case ACPI_TYPE_INTEGER:
/*
* If this is a number, then the Source Name is NULL, since the
* entire buffer was zeroed out, we can leave this alone.
*
* Add to the Length field the length of the u32 NULL
*/
user_prt->length += sizeof (u32);
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
index, acpi_ut_get_object_type_name (obj_desc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/* Now align the current length */
user_prt->length = (u32) ACPI_ROUND_UP_to_64_bITS (user_prt->length);
/*
* 4) Fourth subobject: Dereference the PRT.source_index
*/
obj_desc = sub_object_list[3];
if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
user_prt->source_index = (u32) obj_desc->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"(PRT[%X].source_index) Need Integer, found %s\n",
index, acpi_ut_get_object_type_name (obj_desc)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/* Point to the next union acpi_operand_object in the top level package */
top_object_list++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
output_buffer->pointer, (u32) output_buffer->length));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_create_byte_stream
*
* PARAMETERS: linked_list_buffer - Pointer to the resource linked list
* output_buffer - Pointer to the user's buffer
*
* RETURN: Status AE_OK if okay, else a valid acpi_status code.
* If the output_buffer is too small, the error will be
* AE_BUFFER_OVERFLOW and output_buffer->Length will point
* to the size buffer needed.
*
* DESCRIPTION: Takes the linked list of device resources and
* creates a bytestream to be used as input for the
* _SRS control method.
*
******************************************************************************/
acpi_status
acpi_rs_create_byte_stream (
struct acpi_resource *linked_list_buffer,
struct acpi_buffer *output_buffer)
{
acpi_status status;
acpi_size byte_stream_size_needed = 0;
ACPI_FUNCTION_TRACE ("rs_create_byte_stream");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "linked_list_buffer = %p\n",
linked_list_buffer));
/*
* Params already validated, so we don't re-validate here
*
* Pass the linked_list_buffer into a module that calculates
* the buffer size needed for the byte stream.
*/
status = acpi_rs_get_byte_stream_length (linked_list_buffer,
&byte_stream_size_needed);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_size_needed=%X, %s\n",
(u32) byte_stream_size_needed, acpi_format_exception (status)));
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Validate/Allocate/Clear caller buffer */
status = acpi_ut_initialize_buffer (output_buffer, byte_stream_size_needed);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Do the conversion */
status = acpi_rs_list_to_byte_stream (linked_list_buffer, byte_stream_size_needed,
output_buffer->pointer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
output_buffer->pointer, (u32) output_buffer->length));
return_ACPI_STATUS (AE_OK);
}
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