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-rw-r--r--drivers/acpi/resources/rscreate.c428
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diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c
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+/*******************************************************************************
+ *
+ * Module Name: rscreate - Create resource lists/tables
+ *
+ ******************************************************************************/
+
+/*
+ * 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>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT ACPI_RESOURCES
+ ACPI_MODULE_NAME ("rscreate")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_create_resource_list
+ *
+ * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
+ * output_buffer - Pointer to the user's buffer
+ *
+ * RETURN: Status - AE_OK if okay, else a valid acpi_status code
+ * If output_buffer is not large enough, output_buffer_length
+ * indicates how large output_buffer should be, else it
+ * indicates how may u8 elements of output_buffer are valid.
+ *
+ * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
+ * execution and parses the stream to create a linked list
+ * of device resources.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_create_resource_list (
+ union acpi_operand_object *byte_stream_buffer,
+ struct acpi_buffer *output_buffer)
+{
+
+ acpi_status status;
+ u8 *byte_stream_start;
+ acpi_size list_size_needed = 0;
+ u32 byte_stream_buffer_length;
+
+
+ ACPI_FUNCTION_TRACE ("rs_create_resource_list");
+
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_buffer = %p\n",
+ byte_stream_buffer));
+
+ /*
+ * Params already validated, so we don't re-validate here
+ */
+ byte_stream_buffer_length = byte_stream_buffer->buffer.length;
+ byte_stream_start = byte_stream_buffer->buffer.pointer;
+
+ /*
+ * Pass the byte_stream_buffer into a module that can calculate
+ * the buffer size needed for the linked list
+ */
+ status = acpi_rs_get_list_length (byte_stream_start, byte_stream_buffer_length,
+ &list_size_needed);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
+ status, (u32) list_size_needed));
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Validate/Allocate/Clear caller buffer */
+
+ status = acpi_ut_initialize_buffer (output_buffer, list_size_needed);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Do the conversion */
+
+ status = acpi_rs_byte_stream_to_list (byte_stream_start, byte_stream_buffer_length,
+ output_buffer->pointer);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
+ output_buffer->pointer, (u32) output_buffer->length));
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_create_pci_routing_table
+ *
+ * PARAMETERS: package_object - Pointer to an union acpi_operand_object
+ * package
+ * output_buffer - Pointer to the user's buffer
+ *
+ * RETURN: Status AE_OK if okay, else a valid acpi_status code.
+ * If the output_buffer is too small, the error will be
+ * AE_BUFFER_OVERFLOW and output_buffer->Length will point
+ * to the size buffer needed.
+ *
+ * DESCRIPTION: Takes the union acpi_operand_object package and creates a
+ * linked list of PCI interrupt descriptions
+ *
+ * NOTE: It is the caller's responsibility to ensure that the start of the
+ * output buffer is aligned properly (if necessary).
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_create_pci_routing_table (
+ union acpi_operand_object *package_object,
+ struct acpi_buffer *output_buffer)
+{
+ u8 *buffer;
+ union acpi_operand_object **top_object_list;
+ union acpi_operand_object **sub_object_list;
+ union acpi_operand_object *obj_desc;
+ acpi_size buffer_size_needed = 0;
+ u32 number_of_elements;
+ u32 index;
+ struct acpi_pci_routing_table *user_prt;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+ struct acpi_buffer path_buffer;
+
+
+ ACPI_FUNCTION_TRACE ("rs_create_pci_routing_table");
+
+
+ /* Params already validated, so we don't re-validate here */
+
+ /*
+ * Get the required buffer length
+ */
+ status = acpi_rs_get_pci_routing_table_length (package_object,
+ &buffer_size_needed);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "buffer_size_needed = %X\n",
+ (u32) buffer_size_needed));
+
+ /* Validate/Allocate/Clear caller buffer */
+
+ status = acpi_ut_initialize_buffer (output_buffer, buffer_size_needed);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /*
+ * Loop through the ACPI_INTERNAL_OBJECTS - Each object
+ * should be a package that in turn contains an
+ * acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
+ */
+ top_object_list = package_object->package.elements;
+ number_of_elements = package_object->package.count;
+ buffer = output_buffer->pointer;
+ user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
+
+ for (index = 0; index < number_of_elements; index++) {
+ /*
+ * Point user_prt past this current structure
+ *
+ * NOTE: On the first iteration, user_prt->Length will
+ * be zero because we cleared the return buffer earlier
+ */
+ buffer += user_prt->length;
+ user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
+
+ /*
+ * Fill in the Length field with the information we have at this point.
+ * The minus four is to subtract the size of the u8 Source[4] member
+ * because it is added below.
+ */
+ user_prt->length = (sizeof (struct acpi_pci_routing_table) - 4);
+
+ /*
+ * Each element of the top-level package must also be a package
+ */
+ if (ACPI_GET_OBJECT_TYPE (*top_object_list) != ACPI_TYPE_PACKAGE) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X]) Need sub-package, found %s\n",
+ index, acpi_ut_get_object_type_name (*top_object_list)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Each sub-package must be of length 4 */
+
+ if ((*top_object_list)->package.count != 4) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X]) Need package of length 4, found length %d\n",
+ index, (*top_object_list)->package.count));
+ return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
+ }
+
+ /*
+ * Dereference the sub-package.
+ * The sub_object_list will now point to an array of the four IRQ
+ * elements: [Address, Pin, Source, source_index]
+ */
+ sub_object_list = (*top_object_list)->package.elements;
+
+ /*
+ * 1) First subobject: Dereference the PRT.Address
+ */
+ obj_desc = sub_object_list[0];
+ if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
+ user_prt->address = obj_desc->integer.value;
+ }
+ else {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X].Address) Need Integer, found %s\n",
+ index, acpi_ut_get_object_type_name (obj_desc)));
+ return_ACPI_STATUS (AE_BAD_DATA);
+ }
+
+ /*
+ * 2) Second subobject: Dereference the PRT.Pin
+ */
+ obj_desc = sub_object_list[1];
+ if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
+ user_prt->pin = (u32) obj_desc->integer.value;
+ }
+ else {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X].Pin) Need Integer, found %s\n",
+ index, acpi_ut_get_object_type_name (obj_desc)));
+ return_ACPI_STATUS (AE_BAD_DATA);
+ }
+
+ /*
+ * 3) Third subobject: Dereference the PRT.source_name
+ */
+ obj_desc = sub_object_list[2];
+ switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
+ case ACPI_TYPE_LOCAL_REFERENCE:
+
+ if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X].Source) Need name, found reference op %X\n",
+ index, obj_desc->reference.opcode));
+ return_ACPI_STATUS (AE_BAD_DATA);
+ }
+
+ node = obj_desc->reference.node;
+
+ /* Use *remaining* length of the buffer as max for pathname */
+
+ path_buffer.length = output_buffer->length -
+ (u32) ((u8 *) user_prt->source -
+ (u8 *) output_buffer->pointer);
+ path_buffer.pointer = user_prt->source;
+
+ status = acpi_ns_handle_to_pathname ((acpi_handle) node, &path_buffer);
+
+ user_prt->length += (u32) ACPI_STRLEN (user_prt->source) + 1; /* include null terminator */
+ break;
+
+
+ case ACPI_TYPE_STRING:
+
+ ACPI_STRCPY (user_prt->source, obj_desc->string.pointer);
+
+ /* Add to the Length field the length of the string (add 1 for terminator) */
+
+ user_prt->length += obj_desc->string.length + 1;
+ break;
+
+
+ case ACPI_TYPE_INTEGER:
+ /*
+ * If this is a number, then the Source Name is NULL, since the
+ * entire buffer was zeroed out, we can leave this alone.
+ *
+ * Add to the Length field the length of the u32 NULL
+ */
+ user_prt->length += sizeof (u32);
+ break;
+
+
+ default:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
+ index, acpi_ut_get_object_type_name (obj_desc)));
+ return_ACPI_STATUS (AE_BAD_DATA);
+ }
+
+ /* Now align the current length */
+
+ user_prt->length = (u32) ACPI_ROUND_UP_to_64_bITS (user_prt->length);
+
+ /*
+ * 4) Fourth subobject: Dereference the PRT.source_index
+ */
+ obj_desc = sub_object_list[3];
+ if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
+ user_prt->source_index = (u32) obj_desc->integer.value;
+ }
+ else {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "(PRT[%X].source_index) Need Integer, found %s\n",
+ index, acpi_ut_get_object_type_name (obj_desc)));
+ return_ACPI_STATUS (AE_BAD_DATA);
+ }
+
+ /* Point to the next union acpi_operand_object in the top level package */
+
+ top_object_list++;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
+ output_buffer->pointer, (u32) output_buffer->length));
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_create_byte_stream
+ *
+ * PARAMETERS: linked_list_buffer - Pointer to the resource linked list
+ * output_buffer - Pointer to the user's buffer
+ *
+ * RETURN: Status AE_OK if okay, else a valid acpi_status code.
+ * If the output_buffer is too small, the error will be
+ * AE_BUFFER_OVERFLOW and output_buffer->Length will point
+ * to the size buffer needed.
+ *
+ * DESCRIPTION: Takes the linked list of device resources and
+ * creates a bytestream to be used as input for the
+ * _SRS control method.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_create_byte_stream (
+ struct acpi_resource *linked_list_buffer,
+ struct acpi_buffer *output_buffer)
+{
+ acpi_status status;
+ acpi_size byte_stream_size_needed = 0;
+
+
+ ACPI_FUNCTION_TRACE ("rs_create_byte_stream");
+
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "linked_list_buffer = %p\n",
+ linked_list_buffer));
+
+ /*
+ * Params already validated, so we don't re-validate here
+ *
+ * Pass the linked_list_buffer into a module that calculates
+ * the buffer size needed for the byte stream.
+ */
+ status = acpi_rs_get_byte_stream_length (linked_list_buffer,
+ &byte_stream_size_needed);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_size_needed=%X, %s\n",
+ (u32) byte_stream_size_needed, acpi_format_exception (status)));
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Validate/Allocate/Clear caller buffer */
+
+ status = acpi_ut_initialize_buffer (output_buffer, byte_stream_size_needed);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Do the conversion */
+
+ status = acpi_rs_list_to_byte_stream (linked_list_buffer, byte_stream_size_needed,
+ output_buffer->pointer);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
+ output_buffer->pointer, (u32) output_buffer->length));
+ return_ACPI_STATUS (AE_OK);
+}
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.