--- /dev/null
+/*******************************************************************************
+ *
+ * Module Name: rslist - Linked list utilities
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 "accommon.h"
+#include "acresrc.h"
+
+#define _COMPONENT ACPI_RESOURCES
+ACPI_MODULE_NAME("rslist")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_convert_aml_to_resources
+ *
+ * PARAMETERS: acpi_walk_aml_callback
+ * resource_ptr - Pointer to the buffer that will
+ * contain the output structures
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Convert an AML resource to an internal representation of the
+ * resource that is aligned and easier to access.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_rs_convert_aml_to_resources(u8 * aml,
+ u32 length,
+ u32 offset, u8 resource_index, void **context)
+{
+ struct acpi_resource **resource_ptr =
+ ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
+ struct acpi_resource *resource;
+ union aml_resource *aml_resource;
+ struct acpi_rsconvert_info *conversion_table;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
+
+ /*
+ * Check that the input buffer and all subsequent pointers into it
+ * are aligned on a native word boundary. Most important on IA64
+ */
+ resource = *resource_ptr;
+ if (ACPI_IS_MISALIGNED(resource)) {
+ ACPI_WARNING((AE_INFO,
+ "Misaligned resource pointer %p", resource));
+ }
+
+ /* Get the appropriate conversion info table */
+
+ aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
+ if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) {
+ if (aml_resource->common_serial_bus.type >
+ AML_RESOURCE_MAX_SERIALBUSTYPE) {
+ conversion_table = NULL;
+ } else {
+ /* This is an I2C, SPI, or UART serial_bus descriptor */
+
+ conversion_table =
+ acpi_gbl_convert_resource_serial_bus_dispatch
+ [aml_resource->common_serial_bus.type];
+ }
+ } else {
+ conversion_table =
+ acpi_gbl_get_resource_dispatch[resource_index];
+ }
+
+ if (!conversion_table) {
+ ACPI_ERROR((AE_INFO,
+ "Invalid/unsupported resource descriptor: Type 0x%2.2X",
+ resource_index));
+ return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+ }
+
+ /* Convert the AML byte stream resource to a local resource struct */
+
+ status =
+ acpi_rs_convert_aml_to_resource(resource, aml_resource,
+ conversion_table);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not convert AML resource (Type 0x%X)",
+ *aml));
+ return_ACPI_STATUS(status);
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
+ "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
+ acpi_ut_get_resource_type(aml), length,
+ resource->length));
+
+ /* Point to the next structure in the output buffer */
+
+ *resource_ptr = ACPI_NEXT_RESOURCE(resource);
+ return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_convert_resources_to_aml
+ *
+ * PARAMETERS: resource - Pointer to the resource linked list
+ * aml_size_needed - Calculated size of the byte stream
+ * needed from calling acpi_rs_get_aml_length()
+ * The size of the output_buffer is
+ * guaranteed to be >= aml_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_convert_resources_to_aml(struct acpi_resource *resource,
+ acpi_size aml_size_needed, u8 * output_buffer)
+{
+ u8 *aml = output_buffer;
+ u8 *end_aml = output_buffer + aml_size_needed;
+ struct acpi_rsconvert_info *conversion_table;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
+
+ /* Walk the resource descriptor list, convert each descriptor */
+
+ while (aml < end_aml) {
+
+ /* Validate the (internal) Resource Type */
+
+ if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
+ ACPI_ERROR((AE_INFO,
+ "Invalid descriptor type (0x%X) in resource list",
+ resource->type));
+ return_ACPI_STATUS(AE_BAD_DATA);
+ }
+
+ /* Sanity check the length. It must not be zero, or we loop forever */
+
+ if (!resource->length) {
+ ACPI_ERROR((AE_INFO,
+ "Invalid zero length descriptor in resource list\n"));
+ return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
+ }
+
+ /* Perform the conversion */
+
+ if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
+ if (resource->data.common_serial_bus.type >
+ AML_RESOURCE_MAX_SERIALBUSTYPE) {
+ conversion_table = NULL;
+ } else {
+ /* This is an I2C, SPI, or UART serial_bus descriptor */
+
+ conversion_table =
+ acpi_gbl_convert_resource_serial_bus_dispatch
+ [resource->data.common_serial_bus.type];
+ }
+ } else {
+ conversion_table =
+ acpi_gbl_set_resource_dispatch[resource->type];
+ }
+
+ if (!conversion_table) {
+ ACPI_ERROR((AE_INFO,
+ "Invalid/unsupported resource descriptor: Type 0x%2.2X",
+ resource->type));
+ return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+ }
+
+ status = acpi_rs_convert_resource_to_aml(resource,
+ ACPI_CAST_PTR(union
+ aml_resource,
+ aml),
+ conversion_table);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not convert resource (type 0x%X) to AML",
+ resource->type));
+ return_ACPI_STATUS(status);
+ }
+
+ /* Perform final sanity check on the new AML resource descriptor */
+
+ status = acpi_ut_validate_resource(NULL,
+ ACPI_CAST_PTR(union
+ aml_resource,
+ aml), NULL);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Check for end-of-list, normal exit */
+
+ if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
+
+ /* An End Tag indicates the end of the input Resource Template */
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /*
+ * Extract the total length of the new descriptor and set the
+ * Aml to point to the next (output) resource descriptor
+ */
+ aml += acpi_ut_get_descriptor_length(aml);
+
+ /* Point to the next input resource descriptor */
+
+ resource = ACPI_NEXT_RESOURCE(resource);
+ }
+
+ /* Completed buffer, but did not find an end_tag resource descriptor */
+
+ return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+}
Code Review / kvmfornfv.git / blobdiff