Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 824 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c
new file mode 100644
index 000000000..fcf129d27
--- /dev/null
+++ b/drivers/acpi/acpica/rscalc.c
@@ -0,0 +1,824 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: rscalc - Calculate stream and list lengths
+ *
+ ******************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acresrc.h"
+#include "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
+ *              resource_list_size  - Size of 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 resource_list_size, acpi_size *size_needed)
+{
+	acpi_size aml_size_needed = 0;
+	struct acpi_resource *resource_end;
+	acpi_rs_length total_size;
+
+	ACPI_FUNCTION_TRACE(rs_get_aml_length);
+
+	/* Traverse entire list of internal resource descriptors */
+
+	resource_end =
+	    ACPI_ADD_PTR(struct acpi_resource, resource, resource_list_size);
+	while (resource < resource_end) {
+
+		/* Validate the descriptor type */
+
+		if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
+			return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+		}
+
+		/* Sanity check the length. It must not be zero, or we loop forever */
+
+		if (!resource->length) {
+			return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
+		}
+
+		/* 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;
+
+		case ACPI_RESOURCE_TYPE_GPIO:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.gpio.
+						       pin_table_length * 2) +
+						      resource->data.gpio.
+						      resource_source.
+						      string_length +
+						      resource->data.gpio.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_PIN_FUNCTION:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.
+						       pin_function.
+						       pin_table_length * 2) +
+						      resource->data.
+						      pin_function.
+						      resource_source.
+						      string_length +
+						      resource->data.
+						      pin_function.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_SERIAL_BUS:
+
+			total_size =
+			    acpi_gbl_aml_resource_serial_bus_sizes[resource->
+								   data.
+								   common_serial_bus.
+								   type];
+
+			total_size = (acpi_rs_length)(total_size +
+						      resource->data.
+						      i2c_serial_bus.
+						      resource_source.
+						      string_length +
+						      resource->data.
+						      i2c_serial_bus.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_PIN_CONFIG:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.
+						       pin_config.
+						       pin_table_length * 2) +
+						      resource->data.pin_config.
+						      resource_source.
+						      string_length +
+						      resource->data.pin_config.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_PIN_GROUP:
+
+			total_size = (acpi_rs_length)(total_size +
+						      (resource->data.pin_group.
+						       pin_table_length * 2) +
+						      resource->data.pin_group.
+						      resource_label.
+						      string_length +
+						      resource->data.pin_group.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_PIN_GROUP_FUNCTION:
+
+			total_size = (acpi_rs_length)(total_size +
+						      resource->data.
+						      pin_group_function.
+						      resource_source.
+						      string_length +
+						      resource->data.
+						      pin_group_function.
+						      resource_source_label.
+						      string_length +
+						      resource->data.
+						      pin_group_function.
+						      vendor_length);
+
+			break;
+
+		case ACPI_RESOURCE_TYPE_PIN_GROUP_CONFIG:
+
+			total_size = (acpi_rs_length)(total_size +
+						      resource->data.
+						      pin_group_config.
+						      resource_source.
+						      string_length +
+						      resource->data.
+						      pin_group_config.
+						      resource_source_label.
+						      string_length +
+						      resource->data.
+						      pin_group_config.
+						      vendor_length);
+
+			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;
+	union aml_resource *aml_resource;
+
+	ACPI_FUNCTION_TRACE(rs_get_list_length);
+
+	*size_needed = ACPI_RS_SIZE_MIN;	/* Minimum size is one end_tag */
+	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(NULL, aml_buffer,
+					      &resource_index);
+		if (ACPI_FAILURE(status)) {
+			/*
+			 * Exit on failure. Cannot continue because the descriptor length
+			 * may be bogus also.
+			 */
+			return_ACPI_STATUS(status);
+		}
+
+		aml_resource = (void *)aml_buffer;
+
+		/* 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;
+
+			/*
+			 * There is already one byte included in the minimum
+			 * descriptor size. If there are extra struct bytes,
+			 * subtract one from the count.
+			 */
+			if (extra_struct_bytes) {
+				extra_struct_bytes--;
+			}
+			break;
+
+		case ACPI_RESOURCE_NAME_END_TAG:
+			/*
+			 * End Tag: This is the normal exit
+			 */
+			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;
+
+		case ACPI_RESOURCE_NAME_GPIO:
+
+			/* Vendor data is optional */
+
+			if (aml_resource->gpio.vendor_length) {
+				extra_struct_bytes +=
+				    aml_resource->gpio.vendor_offset -
+				    aml_resource->gpio.pin_table_offset +
+				    aml_resource->gpio.vendor_length;
+			} else {
+				extra_struct_bytes +=
+				    aml_resource->large_header.resource_length +
+				    sizeof(struct aml_resource_large_header) -
+				    aml_resource->gpio.pin_table_offset;
+			}
+			break;
+
+		case ACPI_RESOURCE_NAME_PIN_FUNCTION:
+
+			/* Vendor data is optional */
+
+			if (aml_resource->pin_function.vendor_length) {
+				extra_struct_bytes +=
+				    aml_resource->pin_function.vendor_offset -
+				    aml_resource->pin_function.
+				    pin_table_offset +
+				    aml_resource->pin_function.vendor_length;
+			} else {
+				extra_struct_bytes +=
+				    aml_resource->large_header.resource_length +
+				    sizeof(struct aml_resource_large_header) -
+				    aml_resource->pin_function.pin_table_offset;
+			}
+			break;
+
+		case ACPI_RESOURCE_NAME_SERIAL_BUS:
+
+			minimum_aml_resource_length =
+			    acpi_gbl_resource_aml_serial_bus_sizes
+			    [aml_resource->common_serial_bus.type];
+			extra_struct_bytes +=
+			    aml_resource->common_serial_bus.resource_length -
+			    minimum_aml_resource_length;
+			break;
+
+		case ACPI_RESOURCE_NAME_PIN_CONFIG:
+
+			/* Vendor data is optional */
+
+			if (aml_resource->pin_config.vendor_length) {
+				extra_struct_bytes +=
+				    aml_resource->pin_config.vendor_offset -
+				    aml_resource->pin_config.pin_table_offset +
+				    aml_resource->pin_config.vendor_length;
+			} else {
+				extra_struct_bytes +=
+				    aml_resource->large_header.resource_length +
+				    sizeof(struct aml_resource_large_header) -
+				    aml_resource->pin_config.pin_table_offset;
+			}
+			break;
+
+		case ACPI_RESOURCE_NAME_PIN_GROUP:
+
+			extra_struct_bytes +=
+			    aml_resource->pin_group.vendor_offset -
+			    aml_resource->pin_group.pin_table_offset +
+			    aml_resource->pin_group.vendor_length;
+
+			break;
+
+		case ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION:
+
+			extra_struct_bytes +=
+			    aml_resource->pin_group_function.vendor_offset -
+			    aml_resource->pin_group_function.res_source_offset +
+			    aml_resource->pin_group_function.vendor_length;
+
+			break;
+
+		case ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG:
+
+			extra_struct_bytes +=
+			    aml_resource->pin_group_config.vendor_offset -
+			    aml_resource->pin_group_config.res_source_offset +
+			    aml_resource->pin_group_config.vendor_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.
+		 */
+		if (acpi_ut_get_resource_type(aml_buffer) ==
+		    ACPI_RESOURCE_NAME_SERIAL_BUS) {
+			buffer_size =
+			    acpi_gbl_resource_struct_serial_bus_sizes
+			    [aml_resource->common_serial_bus.type] +
+			    extra_struct_bytes;
+		} else {
+			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 subpackage */
+
+		package_element = *top_object_list;
+
+		/* We must have a valid Package object */
+
+		if (!package_element ||
+		    (package_element->common.type != ACPI_TYPE_PACKAGE)) {
+			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+		}
+
+		/*
+		 * 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 < package_element->package.count
+		     && !name_found; table_index++) {
+			if (*sub_object_list &&	/* Null object allowed */
+			    ((ACPI_TYPE_STRING ==
+			      (*sub_object_list)->common.type) ||
+			     ((ACPI_TYPE_LOCAL_REFERENCE ==
+			       (*sub_object_list)->common.type) &&
+			      ((*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 ((*sub_object_list)->common.type == 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);
+			}
+		} 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);
+}