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linux/drivers/acpi/resources/rslist.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

519 lines
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/*******************************************************************************
*
* Module Name: rslist - Linked list utilities
*
******************************************************************************/
/*
* 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>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rslist")
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_resource_type
*
* PARAMETERS: resource_start_byte - Byte 0 of a resource descriptor
*
* RETURN: The Resource Type (Name) with no extraneous bits
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
u8
acpi_rs_get_resource_type (
u8 resource_start_byte)
{
ACPI_FUNCTION_ENTRY ();
/*
* Determine if this is a small or large resource
*/
switch (resource_start_byte & ACPI_RDESC_TYPE_MASK) {
case ACPI_RDESC_TYPE_SMALL:
/*
* Small Resource Type -- Only bits 6:3 are valid
*/
return ((u8) (resource_start_byte & ACPI_RDESC_SMALL_MASK));
case ACPI_RDESC_TYPE_LARGE:
/*
* Large Resource Type -- All bits are valid
*/
return (resource_start_byte);
default:
/* No other types of resource descriptor */
break;
}
return (0xFF);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_byte_stream_to_list
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
* byte_stream_buffer_length - Length of byte_stream_buffer
* output_buffer - Pointer to the buffer that will
* contain the output structures
*
* RETURN: Status
*
* DESCRIPTION: Takes the resource byte stream and parses it, creating a
* linked list of resources in the caller's output buffer
*
******************************************************************************/
acpi_status
acpi_rs_byte_stream_to_list (
u8 *byte_stream_buffer,
u32 byte_stream_buffer_length,
u8 *output_buffer)
{
acpi_status status;
acpi_size bytes_parsed = 0;
u8 resource_type = 0;
acpi_size bytes_consumed = 0;
u8 *buffer = output_buffer;
acpi_size structure_size = 0;
u8 end_tag_processed = FALSE;
struct acpi_resource *resource;
ACPI_FUNCTION_TRACE ("rs_byte_stream_to_list");
while (bytes_parsed < byte_stream_buffer_length &&
!end_tag_processed) {
/*
* The next byte in the stream is the resource type
*/
resource_type = acpi_rs_get_resource_type (*byte_stream_buffer);
switch (resource_type) {
case ACPI_RDESC_TYPE_MEMORY_24:
/*
* 24-Bit Memory Resource
*/
status = acpi_rs_memory24_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_LARGE_VENDOR:
/*
* Vendor Defined Resource
*/
status = acpi_rs_vendor_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_MEMORY_32:
/*
* 32-Bit Memory Range Resource
*/
status = acpi_rs_memory32_range_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
/*
* 32-Bit Fixed Memory Resource
*/
status = acpi_rs_fixed_memory32_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
/*
* 64-Bit Address Resource
*/
status = acpi_rs_address64_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
/*
* 32-Bit Address Resource
*/
status = acpi_rs_address32_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
/*
* 16-Bit Address Resource
*/
status = acpi_rs_address16_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
/*
* Extended IRQ
*/
status = acpi_rs_extended_irq_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_IRQ_FORMAT:
/*
* IRQ Resource
*/
status = acpi_rs_irq_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_DMA_FORMAT:
/*
* DMA Resource
*/
status = acpi_rs_dma_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_START_DEPENDENT:
/*
* Start Dependent Functions Resource
*/
status = acpi_rs_start_depend_fns_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_END_DEPENDENT:
/*
* End Dependent Functions Resource
*/
status = acpi_rs_end_depend_fns_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_IO_PORT:
/*
* IO Port Resource
*/
status = acpi_rs_io_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_FIXED_IO_PORT:
/*
* Fixed IO Port Resource
*/
status = acpi_rs_fixed_io_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_SMALL_VENDOR:
/*
* Vendor Specific Resource
*/
status = acpi_rs_vendor_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
case ACPI_RDESC_TYPE_END_TAG:
/*
* End Tag
*/
end_tag_processed = TRUE;
status = acpi_rs_end_tag_resource (byte_stream_buffer,
&bytes_consumed, &buffer, &structure_size);
break;
default:
/*
* Invalid/Unknown resource type
*/
status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* Update the return value and counter
*/
bytes_parsed += bytes_consumed;
/*
* Set the byte stream to point to the next resource
*/
byte_stream_buffer += bytes_consumed;
/*
* Set the Buffer to the next structure
*/
resource = ACPI_CAST_PTR (struct acpi_resource, buffer);
resource->length = (u32) ACPI_ALIGN_RESOURCE_SIZE (resource->length);
buffer += ACPI_ALIGN_RESOURCE_SIZE (structure_size);
} /* end while */
/*
* Check the reason for exiting the while loop
*/
if (!end_tag_processed) {
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_list_to_byte_stream
*
* PARAMETERS: linked_list - Pointer to the resource linked list
* byte_steam_size_needed - Calculated size of the byte stream
* needed from calling
* acpi_rs_get_byte_stream_length()
* The size of the output_buffer is
* guaranteed to be >=
* byte_stream_size_needed
* output_buffer - Pointer to the buffer that will
* contain the byte stream
*
* RETURN: Status
*
* DESCRIPTION: Takes the resource linked list and parses it, creating a
* byte stream of resources in the caller's output buffer
*
******************************************************************************/
acpi_status
acpi_rs_list_to_byte_stream (
struct acpi_resource *linked_list,
acpi_size byte_stream_size_needed,
u8 *output_buffer)
{
acpi_status status;
u8 *buffer = output_buffer;
acpi_size bytes_consumed = 0;
u8 done = FALSE;
ACPI_FUNCTION_TRACE ("rs_list_to_byte_stream");
while (!done) {
switch (linked_list->id) {
case ACPI_RSTYPE_IRQ:
/*
* IRQ Resource
*/
status = acpi_rs_irq_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_DMA:
/*
* DMA Resource
*/
status = acpi_rs_dma_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_START_DPF:
/*
* Start Dependent Functions Resource
*/
status = acpi_rs_start_depend_fns_stream (linked_list,
&buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_END_DPF:
/*
* End Dependent Functions Resource
*/
status = acpi_rs_end_depend_fns_stream (linked_list,
&buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_IO:
/*
* IO Port Resource
*/
status = acpi_rs_io_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_FIXED_IO:
/*
* Fixed IO Port Resource
*/
status = acpi_rs_fixed_io_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_VENDOR:
/*
* Vendor Defined Resource
*/
status = acpi_rs_vendor_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_END_TAG:
/*
* End Tag
*/
status = acpi_rs_end_tag_stream (linked_list, &buffer, &bytes_consumed);
/*
* An End Tag indicates the end of the Resource Template
*/
done = TRUE;
break;
case ACPI_RSTYPE_MEM24:
/*
* 24-Bit Memory Resource
*/
status = acpi_rs_memory24_stream (linked_list, &buffer, &bytes_consumed);
break;
case ACPI_RSTYPE_MEM32:
/*
* 32-Bit Memory Range Resource
*/
status = acpi_rs_memory32_range_stream (linked_list, &buffer,
&bytes_consumed);
break;
case ACPI_RSTYPE_FIXED_MEM32:
/*
* 32-Bit Fixed Memory Resource
*/
status = acpi_rs_fixed_memory32_stream (linked_list, &buffer,
&bytes_consumed);
break;
case ACPI_RSTYPE_ADDRESS16:
/*
* 16-Bit Address Descriptor Resource
*/
status = acpi_rs_address16_stream (linked_list, &buffer,
&bytes_consumed);
break;
case ACPI_RSTYPE_ADDRESS32:
/*
* 32-Bit Address Descriptor Resource
*/
status = acpi_rs_address32_stream (linked_list, &buffer,
&bytes_consumed);
break;
case ACPI_RSTYPE_ADDRESS64:
/*
* 64-Bit Address Descriptor Resource
*/
status = acpi_rs_address64_stream (linked_list, &buffer,
&bytes_consumed);
break;
case ACPI_RSTYPE_EXT_IRQ:
/*
* Extended IRQ Resource
*/
status = acpi_rs_extended_irq_stream (linked_list, &buffer,
&bytes_consumed);
break;
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid descriptor type (%X) in resource list\n",
linked_list->id));
status = AE_BAD_DATA;
break;
} /* switch (linked_list->Id) */
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* Set the Buffer to point to the open byte
*/
buffer += bytes_consumed;
/*
* Point to the next object
*/
linked_list = ACPI_PTR_ADD (struct acpi_resource,
linked_list, linked_list->length);
}
return_ACPI_STATUS (AE_OK);
}
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