diff options
Diffstat (limited to 'drivers/acpi/resources/rscalc.c')
| -rw-r--r-- | drivers/acpi/resources/rscalc.c | 617 |
1 files changed, 0 insertions, 617 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c deleted file mode 100644 index 8eaaecf92009..000000000000 --- a/drivers/acpi/resources/rscalc.c +++ /dev/null @@ -1,617 +0,0 @@ -/******************************************************************************* - * - * Module Name: rscalc - Calculate stream and list lengths - * - ******************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/acresrc.h> -#include <acpi/acnamesp.h> - -#define _COMPONENT ACPI_RESOURCES -ACPI_MODULE_NAME("rscalc") - -/* Local prototypes */ -static u8 acpi_rs_count_set_bits(u16 bit_field); - -static acpi_rs_length -acpi_rs_struct_option_length(struct acpi_resource_source *resource_source); - -static u32 -acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length); - -/******************************************************************************* - * - * FUNCTION: acpi_rs_count_set_bits - * - * PARAMETERS: bit_field - Field in which to count bits - * - * RETURN: Number of bits set within the field - * - * DESCRIPTION: Count the number of bits set in a resource field. Used for - * (Short descriptor) interrupt and DMA lists. - * - ******************************************************************************/ - -static u8 acpi_rs_count_set_bits(u16 bit_field) -{ - u8 bits_set; - - ACPI_FUNCTION_ENTRY(); - - for (bits_set = 0; bit_field; bits_set++) { - - /* Zero the least significant bit that is set */ - - bit_field &= (u16) (bit_field - 1); - } - - return bits_set; -} - -/******************************************************************************* - * - * FUNCTION: acpi_rs_struct_option_length - * - * PARAMETERS: resource_source - Pointer to optional descriptor field - * - * RETURN: Status - * - * DESCRIPTION: Common code to handle optional resource_source_index and - * resource_source fields in some Large descriptors. Used during - * list-to-stream conversion - * - ******************************************************************************/ - -static acpi_rs_length -acpi_rs_struct_option_length(struct acpi_resource_source *resource_source) -{ - ACPI_FUNCTION_ENTRY(); - - /* - * If the resource_source string is valid, return the size of the string - * (string_length includes the NULL terminator) plus the size of the - * resource_source_index (1). - */ - if (resource_source->string_ptr) { - return ((acpi_rs_length) (resource_source->string_length + 1)); - } - - return (0); -} - -/******************************************************************************* - * - * FUNCTION: acpi_rs_stream_option_length - * - * PARAMETERS: resource_length - Length from the resource header - * minimum_total_length - Minimum length of this resource, before - * any optional fields. Includes header size - * - * RETURN: Length of optional string (0 if no string present) - * - * DESCRIPTION: Common code to handle optional resource_source_index and - * resource_source fields in some Large descriptors. Used during - * stream-to-list conversion - * - ******************************************************************************/ - -static u32 -acpi_rs_stream_option_length(u32 resource_length, - u32 minimum_aml_resource_length) -{ - u32 string_length = 0; - - ACPI_FUNCTION_ENTRY(); - - /* - * The resource_source_index and resource_source are optional elements of some - * Large-type resource descriptors. - */ - - /* - * If the length of the actual resource descriptor is greater than the ACPI - * spec-defined minimum length, it means that a resource_source_index exists - * and is followed by a (required) null terminated string. The string length - * (including the null terminator) is the resource length minus the minimum - * length, minus one byte for the resource_source_index itself. - */ - if (resource_length > minimum_aml_resource_length) { - - /* Compute the length of the optional string */ - - string_length = - resource_length - minimum_aml_resource_length - 1; - } - - /* - * Round the length up to a multiple of the native word in order to - * guarantee that the entire resource descriptor is native word aligned - */ - return ((u32) ACPI_ROUND_UP_TO_NATIVE_WORD(string_length)); -} - -/******************************************************************************* - * - * FUNCTION: acpi_rs_get_aml_length - * - * PARAMETERS: Resource - Pointer to the resource linked list - * size_needed - Where the required size is returned - * - * RETURN: Status - * - * DESCRIPTION: Takes a linked list of internal resource descriptors and - * calculates the size buffer needed to hold the corresponding - * external resource byte stream. - * - ******************************************************************************/ - -acpi_status -acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) -{ - acpi_size aml_size_needed = 0; - acpi_rs_length total_size; - - ACPI_FUNCTION_TRACE(rs_get_aml_length); - - /* Traverse entire list of internal resource descriptors */ - - while (resource) { - - /* Validate the descriptor type */ - - if (resource->type > ACPI_RESOURCE_TYPE_MAX) { - return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); - } - - /* Get the base size of the (external stream) resource descriptor */ - - total_size = acpi_gbl_aml_resource_sizes[resource->type]; - - /* - * Augment the base size for descriptors with optional and/or - * variable-length fields - */ - switch (resource->type) { - case ACPI_RESOURCE_TYPE_IRQ: - - /* Length can be 3 or 2 */ - - if (resource->data.irq.descriptor_length == 2) { - total_size--; - } - break; - - case ACPI_RESOURCE_TYPE_START_DEPENDENT: - - /* Length can be 1 or 0 */ - - if (resource->data.irq.descriptor_length == 0) { - total_size--; - } - break; - - case ACPI_RESOURCE_TYPE_VENDOR: - /* - * Vendor Defined Resource: - * For a Vendor Specific resource, if the Length is between 1 and 7 - * it will be created as a Small Resource data type, otherwise it - * is a Large Resource data type. - */ - if (resource->data.vendor.byte_length > 7) { - - /* Base size of a Large resource descriptor */ - - total_size = - sizeof(struct aml_resource_large_header); - } - - /* Add the size of the vendor-specific data */ - - total_size = (acpi_rs_length) - (total_size + resource->data.vendor.byte_length); - break; - - case ACPI_RESOURCE_TYPE_END_TAG: - /* - * End Tag: - * We are done -- return the accumulated total size. - */ - *size_needed = aml_size_needed + total_size; - - /* Normal exit */ - - return_ACPI_STATUS(AE_OK); - - case ACPI_RESOURCE_TYPE_ADDRESS16: - /* - * 16-Bit Address Resource: - * Add the size of the optional resource_source info - */ - total_size = (acpi_rs_length) - (total_size + - acpi_rs_struct_option_length(&resource->data. - address16. - resource_source)); - break; - - case ACPI_RESOURCE_TYPE_ADDRESS32: - /* - * 32-Bit Address Resource: - * Add the size of the optional resource_source info - */ - total_size = (acpi_rs_length) - (total_size + - acpi_rs_struct_option_length(&resource->data. - address32. - resource_source)); - break; - - case ACPI_RESOURCE_TYPE_ADDRESS64: - /* - * 64-Bit Address Resource: - * Add the size of the optional resource_source info - */ - total_size = (acpi_rs_length) - (total_size + - acpi_rs_struct_option_length(&resource->data. - address64. - resource_source)); - break; - - case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: - /* - * Extended IRQ Resource: - * Add the size of each additional optional interrupt beyond the - * required 1 (4 bytes for each u32 interrupt number) - */ - total_size = (acpi_rs_length) - (total_size + - ((resource->data.extended_irq.interrupt_count - - 1) * 4) + - /* Add the size of the optional resource_source info */ - acpi_rs_struct_option_length(&resource->data. - extended_irq. - resource_source)); - break; - - default: - break; - } - - /* Update the total */ - - aml_size_needed += total_size; - - /* Point to the next object */ - - resource = - ACPI_ADD_PTR(struct acpi_resource, resource, - resource->length); - } - - /* Did not find an end_tag resource descriptor */ - - return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); -} - -/******************************************************************************* - * - * FUNCTION: acpi_rs_get_list_length - * - * PARAMETERS: aml_buffer - Pointer to the resource byte stream - * aml_buffer_length - Size of aml_buffer - * size_needed - Where the size needed is returned - * - * RETURN: Status - * - * DESCRIPTION: Takes an external resource byte stream and calculates the size - * buffer needed to hold the corresponding internal resource - * descriptor linked list. - * - ******************************************************************************/ - -acpi_status -acpi_rs_get_list_length(u8 * aml_buffer, - u32 aml_buffer_length, acpi_size * size_needed) -{ - acpi_status status; - u8 *end_aml; - u8 *buffer; - u32 buffer_size; - u16 temp16; - u16 resource_length; - u32 extra_struct_bytes; - u8 resource_index; - u8 minimum_aml_resource_length; - - ACPI_FUNCTION_TRACE(rs_get_list_length); - - *size_needed = 0; - end_aml = aml_buffer + aml_buffer_length; - - /* Walk the list of AML resource descriptors */ - - while (aml_buffer < end_aml) { - - /* Validate the Resource Type and Resource Length */ - - status = acpi_ut_validate_resource(aml_buffer, &resource_index); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Get the resource length and base (minimum) AML size */ - - resource_length = acpi_ut_get_resource_length(aml_buffer); - minimum_aml_resource_length = - acpi_gbl_resource_aml_sizes[resource_index]; - - /* - * Augment the size for descriptors with optional - * and/or variable length fields - */ - extra_struct_bytes = 0; - buffer = - aml_buffer + acpi_ut_get_resource_header_length(aml_buffer); - - switch (acpi_ut_get_resource_type(aml_buffer)) { - case ACPI_RESOURCE_NAME_IRQ: - /* - * IRQ Resource: - * Get the number of bits set in the 16-bit IRQ mask - */ - ACPI_MOVE_16_TO_16(&temp16, buffer); - extra_struct_bytes = acpi_rs_count_set_bits(temp16); - break; - - case ACPI_RESOURCE_NAME_DMA: - /* - * DMA Resource: - * Get the number of bits set in the 8-bit DMA mask - */ - extra_struct_bytes = acpi_rs_count_set_bits(*buffer); - break; - - case ACPI_RESOURCE_NAME_VENDOR_SMALL: - case ACPI_RESOURCE_NAME_VENDOR_LARGE: - /* - * Vendor Resource: - * Get the number of vendor data bytes - */ - extra_struct_bytes = resource_length; - break; - - case ACPI_RESOURCE_NAME_END_TAG: - /* - * End Tag: - * This is the normal exit, add size of end_tag - */ - *size_needed += ACPI_RS_SIZE_MIN; - return_ACPI_STATUS(AE_OK); - - case ACPI_RESOURCE_NAME_ADDRESS32: - case ACPI_RESOURCE_NAME_ADDRESS16: - case ACPI_RESOURCE_NAME_ADDRESS64: - /* - * Address Resource: - * Add the size of the optional resource_source - */ - extra_struct_bytes = - acpi_rs_stream_option_length(resource_length, - minimum_aml_resource_length); - break; - - case ACPI_RESOURCE_NAME_EXTENDED_IRQ: - /* - * Extended IRQ Resource: - * Using the interrupt_table_length, add 4 bytes for each additional - * interrupt. Note: at least one interrupt is required and is - * included in the minimum descriptor size (reason for the -1) - */ - extra_struct_bytes = (buffer[1] - 1) * sizeof(u32); - - /* Add the size of the optional resource_source */ - - extra_struct_bytes += - acpi_rs_stream_option_length(resource_length - - extra_struct_bytes, - minimum_aml_resource_length); - break; - - default: - break; - } - - /* - * Update the required buffer size for the internal descriptor structs - * - * Important: Round the size up for the appropriate alignment. This - * is a requirement on IA64. - */ - buffer_size = acpi_gbl_resource_struct_sizes[resource_index] + - extra_struct_bytes; - buffer_size = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(buffer_size); - - *size_needed += buffer_size; - - ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, - "Type %.2X, AmlLength %.2X InternalLength %.2X\n", - acpi_ut_get_resource_type(aml_buffer), - acpi_ut_get_descriptor_length(aml_buffer), - buffer_size)); - - /* - * Point to the next resource within the AML stream using the length - * contained in the resource descriptor header - */ - aml_buffer += acpi_ut_get_descriptor_length(aml_buffer); - } - - /* Did not find an end_tag resource descriptor */ - - return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); -} - -/******************************************************************************* - * - * FUNCTION: acpi_rs_get_pci_routing_table_length - * - * PARAMETERS: package_object - Pointer to the package object - * buffer_size_needed - u32 pointer of the size buffer - * needed to properly return the - * parsed data - * - * RETURN: Status - * - * DESCRIPTION: Given a package representing a PCI routing table, this - * calculates the size of the corresponding linked list of - * descriptions. - * - ******************************************************************************/ - -acpi_status -acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object, - acpi_size * buffer_size_needed) -{ - u32 number_of_elements; - acpi_size temp_size_needed = 0; - union acpi_operand_object **top_object_list; - u32 index; - union acpi_operand_object *package_element; - union acpi_operand_object **sub_object_list; - u8 name_found; - u32 table_index; - - ACPI_FUNCTION_TRACE(rs_get_pci_routing_table_length); - - number_of_elements = package_object->package.count; - - /* - * Calculate the size of the return buffer. - * The base size is the number of elements * the sizes of the - * structures. Additional space for the strings is added below. - * The minus one is to subtract the size of the u8 Source[1] - * member because it is added below. - * - * But each PRT_ENTRY structure has a pointer to a string and - * the size of that string must be found. - */ - top_object_list = package_object->package.elements; - - for (index = 0; index < number_of_elements; index++) { - - /* Dereference the sub-package */ - - package_element = *top_object_list; - - /* - * The sub_object_list will now point to an array of the - * four IRQ elements: Address, Pin, Source and source_index - */ - sub_object_list = package_element->package.elements; - - /* Scan the irq_table_elements for the Source Name String */ - - name_found = FALSE; - - for (table_index = 0; table_index < 4 && !name_found; - table_index++) { - if (*sub_object_list && /* Null object allowed */ - ((ACPI_TYPE_STRING == - ACPI_GET_OBJECT_TYPE(*sub_object_list)) || - ((ACPI_TYPE_LOCAL_REFERENCE == - ACPI_GET_OBJECT_TYPE(*sub_object_list)) && - ((*sub_object_list)->reference.class == - ACPI_REFCLASS_NAME)))) { - name_found = TRUE; - } else { - /* Look at the next element */ - - sub_object_list++; - } - } - - temp_size_needed += (sizeof(struct acpi_pci_routing_table) - 4); - - /* Was a String type found? */ - - if (name_found) { - if (ACPI_GET_OBJECT_TYPE(*sub_object_list) == - ACPI_TYPE_STRING) { - /* - * The length String.Length field does not include the - * terminating NULL, add 1 - */ - temp_size_needed += ((acpi_size) - (*sub_object_list)->string. - length + 1); - } else { - temp_size_needed += - acpi_ns_get_pathname_length((*sub_object_list)->reference.node); - if (!temp_size_needed) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - } - } else { - /* - * If no name was found, then this is a NULL, which is - * translated as a u32 zero. - */ - temp_size_needed += sizeof(u32); - } - - /* Round up the size since each element must be aligned */ - - temp_size_needed = ACPI_ROUND_UP_TO_64BIT(temp_size_needed); - - /* Point to the next union acpi_operand_object */ - - top_object_list++; - } - - /* - * Add an extra element to the end of the list, essentially a - * NULL terminator - */ - *buffer_size_needed = - temp_size_needed + sizeof(struct acpi_pci_routing_table); - return_ACPI_STATUS(AE_OK); -} |