1 files changed, 536 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
new file mode 100644
index 000000000000..be32d0105fe2
--- /dev/null
+++ b/drivers/acpi/acpica/exconfig.c
@@ -0,0 +1,536 @@
+/******************************************************************************
+ *
+ * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/actables.h>
+#include <acpi/acdispat.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exconfig")
+
+/* Local prototypes */
+static acpi_status
+acpi_ex_add_table(u32 table_index,
+                  struct acpi_namespace_node *parent_node,
+                  union acpi_operand_object **ddb_handle);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_add_table
+ *
+ * PARAMETERS:  Table               - Pointer to raw table
+ *              parent_node         - Where to load the table (scope)
+ *              ddb_handle          - Where to return the table handle.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Common function to Install and Load an ACPI table with a
+ *              returned table handle.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ex_add_table(u32 table_index,
+                  struct acpi_namespace_node *parent_node,
+                  union acpi_operand_object **ddb_handle)
+{
+        acpi_status status;
+        union acpi_operand_object *obj_desc;
+
+        ACPI_FUNCTION_TRACE(ex_add_table);
+
+        /* Create an object to be the table handle */
+
+        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
+        if (!obj_desc) {
+                return_ACPI_STATUS(AE_NO_MEMORY);
+        }
+
+        /* Init the table handle */
+
+        obj_desc->reference.class = ACPI_REFCLASS_TABLE;
+        *ddb_handle = obj_desc;
+
+        /* Install the new table into the local data structures */
+
+        obj_desc->reference.value = table_index;
+
+        /* Add the table to the namespace */
+
+        status = acpi_ns_load_table(table_index, parent_node);
+        if (ACPI_FAILURE(status)) {
+                acpi_ut_remove_reference(obj_desc);
+                *ddb_handle = NULL;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_load_table_op
+ *
+ * PARAMETERS:  walk_state          - Current state with operands
+ *              return_desc         - Where to store the return object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load an ACPI table from the RSDT/XSDT
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
+                      union acpi_operand_object **return_desc)
+{
+        acpi_status status;
+        union acpi_operand_object **operand = &walk_state->operands[0];
+        struct acpi_namespace_node *parent_node;
+        struct acpi_namespace_node *start_node;
+        struct acpi_namespace_node *parameter_node = NULL;
+        union acpi_operand_object *ddb_handle;
+        struct acpi_table_header *table;
+        u32 table_index;
+
+        ACPI_FUNCTION_TRACE(ex_load_table_op);
+
+        /* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */
+
+        if ((operand[0]->string.length > ACPI_NAME_SIZE) ||
+            (operand[1]->string.length > ACPI_OEM_ID_SIZE) ||
+            (operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) {
+                return_ACPI_STATUS(AE_BAD_PARAMETER);
+        }
+
+        /* Find the ACPI table in the RSDT/XSDT */
+
+        status = acpi_tb_find_table(operand[0]->string.pointer,
+                                    operand[1]->string.pointer,
+                                    operand[2]->string.pointer, &table_index);
+        if (ACPI_FAILURE(status)) {
+                if (status != AE_NOT_FOUND) {
+                        return_ACPI_STATUS(status);
+                }
+
+                /* Table not found, return an Integer=0 and AE_OK */
+
+                ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!ddb_handle) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                ddb_handle->integer.value = 0;
+                *return_desc = ddb_handle;
+
+                return_ACPI_STATUS(AE_OK);
+        }
+
+        /* Default nodes */
+
+        start_node = walk_state->scope_info->scope.node;
+        parent_node = acpi_gbl_root_node;
+
+        /* root_path (optional parameter) */
+
+        if (operand[3]->string.length > 0) {
+                /*
+                 * Find the node referenced by the root_path_string. This is the
+                 * location within the namespace where the table will be loaded.
+                 */
+                status =
+                    acpi_ns_get_node(start_node, operand[3]->string.pointer,
+                                     ACPI_NS_SEARCH_PARENT, &parent_node);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+        }
+
+        /* parameter_path (optional parameter) */
+
+        if (operand[4]->string.length > 0) {
+                if ((operand[4]->string.pointer[0] != '\\') &&
+                    (operand[4]->string.pointer[0] != '^')) {
+                        /*
+                         * Path is not absolute, so it will be relative to the node
+                         * referenced by the root_path_string (or the NS root if omitted)
+                         */
+                        start_node = parent_node;
+                }
+
+                /* Find the node referenced by the parameter_path_string */
+
+                status =
+                    acpi_ns_get_node(start_node, operand[4]->string.pointer,
+                                     ACPI_NS_SEARCH_PARENT, &parameter_node);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+        }
+
+        /* Load the table into the namespace */
+
+        status = acpi_ex_add_table(table_index, parent_node, &ddb_handle);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /* Parameter Data (optional) */
+
+        if (parameter_node) {
+
+                /* Store the parameter data into the optional parameter object */
+
+                status = acpi_ex_store(operand[5],
+                                       ACPI_CAST_PTR(union acpi_operand_object,
+                                                     parameter_node),
+                                       walk_state);
+                if (ACPI_FAILURE(status)) {
+                        (void)acpi_ex_unload_table(ddb_handle);
+                        return_ACPI_STATUS(status);
+                }
+        }
+
+        status = acpi_get_table_by_index(table_index, &table);
+        if (ACPI_SUCCESS(status)) {
+                ACPI_INFO((AE_INFO,
+                           "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]",
+                           table->signature, table->oem_id,
+                           table->oem_table_id));
+        }
+
+        /* Invoke table handler if present */
+
+        if (acpi_gbl_table_handler) {
+                (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
+                                             acpi_gbl_table_handler_context);
+        }
+
+        *return_desc = ddb_handle;
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_load_op
+ *
+ * PARAMETERS:  obj_desc        - Region or Buffer/Field where the table will be
+ *                                obtained
+ *              Target          - Where a handle to the table will be stored
+ *              walk_state      - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load an ACPI table from a field or operation region
+ *
+ * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer
+ *       objects before this code is reached.
+ *
+ *       If source is an operation region, it must refer to system_memory, as
+ *       per the ACPI specification.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_load_op(union acpi_operand_object *obj_desc,
+                union acpi_operand_object *target,
+                struct acpi_walk_state *walk_state)
+{
+        union acpi_operand_object *ddb_handle;
+        struct acpi_table_header *table;
+        struct acpi_table_desc table_desc;
+        u32 table_index;
+        acpi_status status;
+        u32 length;
+
+        ACPI_FUNCTION_TRACE(ex_load_op);
+
+        ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
+
+        /* Source Object can be either an op_region or a Buffer/Field */
+
+        switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
+        case ACPI_TYPE_REGION:
+
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "Load table from Region %p\n", obj_desc));
+
+                /* Region must be system_memory (from ACPI spec) */
+
+                if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+                }
+
+                /*
+                 * If the Region Address and Length have not been previously evaluated,
+                 * evaluate them now and save the results.
+                 */
+                if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
+                        status = acpi_ds_get_region_arguments(obj_desc);
+                        if (ACPI_FAILURE(status)) {
+                                return_ACPI_STATUS(status);
+                        }
+                }
+
+                /*
+                 * Map the table header and get the actual table length. The region
+                 * length is not guaranteed to be the same as the table length.
+                 */
+                table = acpi_os_map_memory(obj_desc->region.address,
+                                           sizeof(struct acpi_table_header));
+                if (!table) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                length = table->length;
+                acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
+
+                /* Must have at least an ACPI table header */
+
+                if (length < sizeof(struct acpi_table_header)) {
+                        return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+                }
+
+                /*
+                 * The memory region is not guaranteed to remain stable and we must
+                 * copy the table to a local buffer. For example, the memory region
+                 * is corrupted after suspend on some machines. Dynamically loaded
+                 * tables are usually small, so this overhead is minimal.
+                 */
+
+                /* Allocate a buffer for the table */
+
+                table_desc.pointer = ACPI_ALLOCATE(length);
+                if (!table_desc.pointer) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                /* Map the entire table and copy it */
+
+                table = acpi_os_map_memory(obj_desc->region.address, length);
+                if (!table) {
+                        ACPI_FREE(table_desc.pointer);
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                ACPI_MEMCPY(table_desc.pointer, table, length);
+                acpi_os_unmap_memory(table, length);
+
+                table_desc.address = obj_desc->region.address;
+                break;
+
+        case ACPI_TYPE_BUFFER:  /* Buffer or resolved region_field */
+
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "Load table from Buffer or Field %p\n",
+                                  obj_desc));
+
+                /* Must have at least an ACPI table header */
+
+                if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
+                        return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+                }
+
+                /* Get the actual table length from the table header */
+
+                table =
+                    ACPI_CAST_PTR(struct acpi_table_header,
+                                  obj_desc->buffer.pointer);
+                length = table->length;
+
+                /* Table cannot extend beyond the buffer */
+
+                if (length > obj_desc->buffer.length) {
+                        return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
+                }
+                if (length < sizeof(struct acpi_table_header)) {
+                        return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+                }
+
+                /*
+                 * Copy the table from the buffer because the buffer could be modified
+                 * or even deleted in the future
+                 */
+                table_desc.pointer = ACPI_ALLOCATE(length);
+                if (!table_desc.pointer) {
+                        return_ACPI_STATUS(AE_NO_MEMORY);
+                }
+
+                ACPI_MEMCPY(table_desc.pointer, table, length);
+                table_desc.address = ACPI_TO_INTEGER(table_desc.pointer);
+                break;
+
+        default:
+                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+        }
+
+        /* Validate table checksum (will not get validated in tb_add_table) */
+
+        status = acpi_tb_verify_checksum(table_desc.pointer, length);
+        if (ACPI_FAILURE(status)) {
+                ACPI_FREE(table_desc.pointer);
+                return_ACPI_STATUS(status);
+        }
+
+        /* Complete the table descriptor */
+
+        table_desc.length = length;
+        table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+
+        /* Install the new table into the local data structures */
+
+        status = acpi_tb_add_table(&table_desc, &table_index);
+        if (ACPI_FAILURE(status)) {
+                goto cleanup;
+        }
+
+        /*
+         * Add the table to the namespace.
+         *
+         * Note: Load the table objects relative to the root of the namespace.
+         * This appears to go against the ACPI specification, but we do it for
+         * compatibility with other ACPI implementations.
+         */
+        status =
+            acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle);
+        if (ACPI_FAILURE(status)) {
+
+                /* On error, table_ptr was deallocated above */
+
+                return_ACPI_STATUS(status);
+        }
+
+        /* Store the ddb_handle into the Target operand */
+
+        status = acpi_ex_store(ddb_handle, target, walk_state);
+        if (ACPI_FAILURE(status)) {
+                (void)acpi_ex_unload_table(ddb_handle);
+
+                /* table_ptr was deallocated above */
+
+                acpi_ut_remove_reference(ddb_handle);
+                return_ACPI_STATUS(status);
+        }
+
+        /* Invoke table handler if present */
+
+        if (acpi_gbl_table_handler) {
+                (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD,
+                                             table_desc.pointer,
+                                             acpi_gbl_table_handler_context);
+        }
+
+      cleanup:
+        if (ACPI_FAILURE(status)) {
+
+                /* Delete allocated table buffer */
+
+                acpi_tb_delete_table(&table_desc);
+        }
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_unload_table
+ *
+ * PARAMETERS:  ddb_handle          - Handle to a previously loaded table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Unload an ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
+{
+        acpi_status status = AE_OK;
+        union acpi_operand_object *table_desc = ddb_handle;
+        u32 table_index;
+        struct acpi_table_header *table;
+
+        ACPI_FUNCTION_TRACE(ex_unload_table);
+
+        /*
+         * Validate the handle
+         * Although the handle is partially validated in acpi_ex_reconfiguration(),
+         * when it calls acpi_ex_resolve_operands(), the handle is more completely
+         * validated here.
+         */
+        if ((!ddb_handle) ||
+            (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
+            (ACPI_GET_OBJECT_TYPE(ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) {
+                return_ACPI_STATUS(AE_BAD_PARAMETER);
+        }
+
+        /* Get the table index from the ddb_handle */
+
+        table_index = table_desc->reference.value;
+
+        /* Invoke table handler if present */
+
+        if (acpi_gbl_table_handler) {
+                status = acpi_get_table_by_index(table_index, &table);
+                if (ACPI_SUCCESS(status)) {
+                        (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
+                                                     table,
+                                                     acpi_gbl_table_handler_context);
+                }
+        }
+
+        /*
+         * Delete the entire namespace under this table Node
+         * (Offset contains the table_id)
+         */
+        acpi_tb_delete_namespace_by_owner(table_index);
+        (void)acpi_tb_release_owner_id(table_index);
+
+        acpi_tb_set_table_loaded_flag(table_index, FALSE);
+
+        /* Table unloaded, remove a reference to the ddb_handle object */
+
+        acpi_ut_remove_reference(ddb_handle);
+        return_ACPI_STATUS(AE_OK);
+}