diff options
Diffstat (limited to 'drivers/acpi/resources/rslist.c')
| -rw-r--r-- | drivers/acpi/resources/rslist.c | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c new file mode 100644 index 000000000000..e49c1e030f99 --- /dev/null +++ b/drivers/acpi/resources/rslist.c @@ -0,0 +1,518 @@ +/******************************************************************************* + * + * 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); +} + |