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!
This commit is contained in:
Linus Torvalds
428
drivers/acpi/resources/rscreate.c
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428
drivers/acpi/resources/rscreate.c
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@@ -0,0 +1,428 @@
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/*******************************************************************************
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*
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* Module Name: rscreate - Create resource lists/tables
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#include <acpi/amlcode.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME ("rscreate")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_create_resource_list
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
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* output_buffer - Pointer to the user's buffer
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*
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* RETURN: Status - AE_OK if okay, else a valid acpi_status code
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* If output_buffer is not large enough, output_buffer_length
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* indicates how large output_buffer should be, else it
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* indicates how may u8 elements of output_buffer are valid.
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*
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* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
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* execution and parses the stream to create a linked list
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* of device resources.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_create_resource_list (
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union acpi_operand_object *byte_stream_buffer,
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struct acpi_buffer *output_buffer)
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{
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acpi_status status;
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u8 *byte_stream_start;
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acpi_size list_size_needed = 0;
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u32 byte_stream_buffer_length;
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ACPI_FUNCTION_TRACE ("rs_create_resource_list");
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_buffer = %p\n",
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byte_stream_buffer));
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/*
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* Params already validated, so we don't re-validate here
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*/
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byte_stream_buffer_length = byte_stream_buffer->buffer.length;
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byte_stream_start = byte_stream_buffer->buffer.pointer;
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/*
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* Pass the byte_stream_buffer into a module that can calculate
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* the buffer size needed for the linked list
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*/
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status = acpi_rs_get_list_length (byte_stream_start, byte_stream_buffer_length,
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&list_size_needed);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
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status, (u32) list_size_needed));
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer (output_buffer, list_size_needed);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Do the conversion */
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status = acpi_rs_byte_stream_to_list (byte_stream_start, byte_stream_buffer_length,
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output_buffer->pointer);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
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output_buffer->pointer, (u32) output_buffer->length));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_create_pci_routing_table
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*
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* PARAMETERS: package_object - Pointer to an union acpi_operand_object
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* package
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* output_buffer - Pointer to the user's buffer
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*
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* RETURN: Status AE_OK if okay, else a valid acpi_status code.
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* If the output_buffer is too small, the error will be
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* AE_BUFFER_OVERFLOW and output_buffer->Length will point
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* to the size buffer needed.
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*
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* DESCRIPTION: Takes the union acpi_operand_object package and creates a
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* linked list of PCI interrupt descriptions
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*
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* NOTE: It is the caller's responsibility to ensure that the start of the
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* output buffer is aligned properly (if necessary).
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*
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******************************************************************************/
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acpi_status
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acpi_rs_create_pci_routing_table (
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union acpi_operand_object *package_object,
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struct acpi_buffer *output_buffer)
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{
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u8 *buffer;
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union acpi_operand_object **top_object_list;
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union acpi_operand_object **sub_object_list;
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union acpi_operand_object *obj_desc;
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acpi_size buffer_size_needed = 0;
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u32 number_of_elements;
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u32 index;
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struct acpi_pci_routing_table *user_prt;
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struct acpi_namespace_node *node;
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acpi_status status;
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struct acpi_buffer path_buffer;
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ACPI_FUNCTION_TRACE ("rs_create_pci_routing_table");
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/* Params already validated, so we don't re-validate here */
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/*
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* Get the required buffer length
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*/
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status = acpi_rs_get_pci_routing_table_length (package_object,
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&buffer_size_needed);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "buffer_size_needed = %X\n",
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(u32) buffer_size_needed));
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer (output_buffer, buffer_size_needed);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/*
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* Loop through the ACPI_INTERNAL_OBJECTS - Each object
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* should be a package that in turn contains an
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* acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
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*/
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top_object_list = package_object->package.elements;
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number_of_elements = package_object->package.count;
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buffer = output_buffer->pointer;
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user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
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for (index = 0; index < number_of_elements; index++) {
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/*
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* Point user_prt past this current structure
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*
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* NOTE: On the first iteration, user_prt->Length will
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* be zero because we cleared the return buffer earlier
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*/
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buffer += user_prt->length;
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user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
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/*
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* Fill in the Length field with the information we have at this point.
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* The minus four is to subtract the size of the u8 Source[4] member
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* because it is added below.
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*/
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user_prt->length = (sizeof (struct acpi_pci_routing_table) - 4);
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/*
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* Each element of the top-level package must also be a package
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*/
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if (ACPI_GET_OBJECT_TYPE (*top_object_list) != ACPI_TYPE_PACKAGE) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X]) Need sub-package, found %s\n",
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index, acpi_ut_get_object_type_name (*top_object_list)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* Each sub-package must be of length 4 */
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if ((*top_object_list)->package.count != 4) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X]) Need package of length 4, found length %d\n",
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index, (*top_object_list)->package.count));
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return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
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}
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/*
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* Dereference the sub-package.
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* The sub_object_list will now point to an array of the four IRQ
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* elements: [Address, Pin, Source, source_index]
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*/
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sub_object_list = (*top_object_list)->package.elements;
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/*
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* 1) First subobject: Dereference the PRT.Address
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*/
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obj_desc = sub_object_list[0];
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
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user_prt->address = obj_desc->integer.value;
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X].Address) Need Integer, found %s\n",
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index, acpi_ut_get_object_type_name (obj_desc)));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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/*
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* 2) Second subobject: Dereference the PRT.Pin
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*/
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obj_desc = sub_object_list[1];
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
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user_prt->pin = (u32) obj_desc->integer.value;
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X].Pin) Need Integer, found %s\n",
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index, acpi_ut_get_object_type_name (obj_desc)));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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/*
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* 3) Third subobject: Dereference the PRT.source_name
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*/
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obj_desc = sub_object_list[2];
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_LOCAL_REFERENCE:
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if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X].Source) Need name, found reference op %X\n",
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index, obj_desc->reference.opcode));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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node = obj_desc->reference.node;
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/* Use *remaining* length of the buffer as max for pathname */
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path_buffer.length = output_buffer->length -
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(u32) ((u8 *) user_prt->source -
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(u8 *) output_buffer->pointer);
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path_buffer.pointer = user_prt->source;
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status = acpi_ns_handle_to_pathname ((acpi_handle) node, &path_buffer);
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user_prt->length += (u32) ACPI_STRLEN (user_prt->source) + 1; /* include null terminator */
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break;
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case ACPI_TYPE_STRING:
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ACPI_STRCPY (user_prt->source, obj_desc->string.pointer);
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/* Add to the Length field the length of the string (add 1 for terminator) */
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user_prt->length += obj_desc->string.length + 1;
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break;
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case ACPI_TYPE_INTEGER:
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/*
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* If this is a number, then the Source Name is NULL, since the
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* entire buffer was zeroed out, we can leave this alone.
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*
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* Add to the Length field the length of the u32 NULL
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*/
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user_prt->length += sizeof (u32);
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
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index, acpi_ut_get_object_type_name (obj_desc)));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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/* Now align the current length */
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user_prt->length = (u32) ACPI_ROUND_UP_to_64_bITS (user_prt->length);
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/*
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* 4) Fourth subobject: Dereference the PRT.source_index
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*/
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obj_desc = sub_object_list[3];
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
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user_prt->source_index = (u32) obj_desc->integer.value;
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"(PRT[%X].source_index) Need Integer, found %s\n",
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index, acpi_ut_get_object_type_name (obj_desc)));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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/* Point to the next union acpi_operand_object in the top level package */
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top_object_list++;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
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output_buffer->pointer, (u32) output_buffer->length));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_create_byte_stream
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*
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* PARAMETERS: linked_list_buffer - Pointer to the resource linked list
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* output_buffer - Pointer to the user's buffer
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*
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* RETURN: Status AE_OK if okay, else a valid acpi_status code.
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* If the output_buffer is too small, the error will be
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* AE_BUFFER_OVERFLOW and output_buffer->Length will point
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* to the size buffer needed.
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*
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* DESCRIPTION: Takes the linked list of device resources and
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* creates a bytestream to be used as input for the
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* _SRS control method.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_create_byte_stream (
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struct acpi_resource *linked_list_buffer,
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struct acpi_buffer *output_buffer)
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{
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acpi_status status;
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acpi_size byte_stream_size_needed = 0;
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ACPI_FUNCTION_TRACE ("rs_create_byte_stream");
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "linked_list_buffer = %p\n",
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linked_list_buffer));
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/*
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* Params already validated, so we don't re-validate here
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*
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* Pass the linked_list_buffer into a module that calculates
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* the buffer size needed for the byte stream.
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*/
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status = acpi_rs_get_byte_stream_length (linked_list_buffer,
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&byte_stream_size_needed);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_size_needed=%X, %s\n",
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(u32) byte_stream_size_needed, acpi_format_exception (status)));
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer (output_buffer, byte_stream_size_needed);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Do the conversion */
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status = acpi_rs_list_to_byte_stream (linked_list_buffer, byte_stream_size_needed,
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output_buffer->pointer);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
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output_buffer->pointer, (u32) output_buffer->length));
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return_ACPI_STATUS (AE_OK);
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}
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