1 files changed, 618 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c
new file mode 100644
index 000000000000..4f2b186fe302
--- /dev/null
+++ b/drivers/acpi/acpica/rscalc.c
@@ -0,0 +1,618 @@
+/*******************************************************************************
+ *
+ * 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/accommon.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);
+}