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/******************************************************************************

 *

 * Module Name: tbxfload - Table load/unload external interfaces

 *

 *****************************************************************************/

/*

 * 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.

 */

#define EXPORT_ACPI_INTERFACES

#include 

#include "accommon.h"

#include "acnamesp.h"

#include "actables.h"

#define _COMPONENT          ACPI_TABLES

ACPI_MODULE_NAME("tbxfload")

/*******************************************************************************

 *

 * FUNCTION:    acpi_load_tables

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT

 *

 ******************************************************************************/

acpi_status __init acpi_load_tables(void)

{

	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_load_tables);

	/* Load the namespace from the tables */

	status = acpi_tb_load_namespace();

	/* Don't let single failures abort the load */

	if (status == AE_CTRL_TERMINATE) {

		status = AE_OK;

	}

	if (ACPI_FAILURE(status)) {

		ACPI_EXCEPTION((AE_INFO, status,

				"While loading namespace from ACPI tables"));

	}

	return_ACPI_STATUS(status);

}

ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)

/*******************************************************************************

 *

 * FUNCTION:    acpi_tb_load_namespace

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in

 *              the RSDT/XSDT.

 *

 ******************************************************************************/

acpi_status acpi_tb_load_namespace(void)

{

	acpi_status status;

	u32 i;

	struct acpi_table_header *new_dsdt;

	struct acpi_table_desc *table;

	u32 tables_loaded = 0;

	u32 tables_failed = 0;

	ACPI_FUNCTION_TRACE(tb_load_namespace);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	/*

	 * Load the namespace. The DSDT is required, but any SSDT and

	 * PSDT tables are optional. Verify the DSDT.

	 */

	table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index];

	if (!acpi_gbl_root_table_list.current_table_count ||

	    !ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_DSDT) ||

	    ACPI_FAILURE(acpi_tb_validate_table(table))) {

		status = AE_NO_ACPI_TABLES;

		goto unlock_and_exit;

	}

	/*

	 * Save the DSDT pointer for simple access. This is the mapped memory

	 * address. We must take care here because the address of the .Tables

	 * array can change dynamically as tables are loaded at run-time. Note:

	 * .Pointer field is not validated until after call to acpi_tb_validate_table.

	 */

	acpi_gbl_DSDT = table->pointer;

	/*

	 * Optionally copy the entire DSDT to local memory (instead of simply

	 * mapping it.) There are some BIOSs that corrupt or replace the original

	 * DSDT, creating the need for this option. Default is FALSE, do not copy

	 * the DSDT.

	 */

	if (acpi_gbl_copy_dsdt_locally) {

		new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index);

		if (new_dsdt) {

			acpi_gbl_DSDT = new_dsdt;

		}

	}

	/*

	 * Save the original DSDT header for detection of table corruption

	 * and/or replacement of the DSDT from outside the OS.

	 */

	memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,

	       sizeof(struct acpi_table_header));

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	/* Load and parse tables */

	status = acpi_ns_load_table(acpi_gbl_dsdt_index, acpi_gbl_root_node);

	if (ACPI_FAILURE(status)) {

		ACPI_EXCEPTION((AE_INFO, status, "[DSDT] table load failed"));

		tables_failed++;

	} else {

		tables_loaded++;

	}

	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {

		table = &acpi_gbl_root_table_list.tables[i];

		if (!acpi_gbl_root_table_list.tables[i].address ||

		    (!ACPI_COMPARE_NAME(table->signature.ascii, ACPI_SIG_SSDT)

		     && !ACPI_COMPARE_NAME(table->signature.ascii,

					   ACPI_SIG_PSDT)

		     && !ACPI_COMPARE_NAME(table->signature.ascii,

					   ACPI_SIG_OSDT))

		    || ACPI_FAILURE(acpi_tb_validate_table(table))) {

			continue;

		}

		/* Ignore errors while loading tables, get as many as possible */

		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

		status = acpi_ns_load_table(i, acpi_gbl_root_node);

		if (ACPI_FAILURE(status)) {

			ACPI_EXCEPTION((AE_INFO, status,

					"(%4.4s:%8.8s) while loading table",

					table->signature.ascii,

					table->pointer->oem_table_id));

			tables_failed++;

			ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,

					      "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",

					      table->signature.ascii,

					      table->pointer->oem_table_id));

		} else {

			tables_loaded++;

		}

		(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	}

	if (!tables_failed) {

		ACPI_INFO((AE_INFO,

			   "%u ACPI AML tables successfully acquired and loaded",

			   tables_loaded));

	} else {

		ACPI_ERROR((AE_INFO,

			    "%u table load failures, %u successful",

			    tables_failed, tables_loaded));

		/* Indicate at least one failure */

		status = AE_CTRL_TERMINATE;

	}

unlock_and_exit:

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_install_table

 *

 * PARAMETERS:  address             - Address of the ACPI table to be installed.

 *              physical            - Whether the address is a physical table

 *                                    address or not

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Dynamically install an ACPI table.

 *              Note: This function should only be invoked after

 *                    acpi_initialize_tables() and before acpi_load_tables().

 *

 ******************************************************************************/

acpi_status __init

acpi_install_table(acpi_physical_address address, u8 physical)

{

	acpi_status status;

	u8 flags;

	u32 table_index;

	ACPI_FUNCTION_TRACE(acpi_install_table);

	if (physical) {

		flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;

	} else {

		flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;

	}

	status = acpi_tb_install_standard_table(address, flags,

						FALSE, FALSE, &table_index);

	return_ACPI_STATUS(status);

}

ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)

/*******************************************************************************

 *

 * FUNCTION:    acpi_load_table

 *

 * PARAMETERS:  table               - Pointer to a buffer containing the ACPI

 *                                    table to be loaded.

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must

 *              be a valid ACPI table with a valid ACPI table header.

 *              Note1: Mainly intended to support hotplug addition of SSDTs.

 *              Note2: Does not copy the incoming table. User is responsible

 *              to ensure that the table is not deleted or unmapped.

 *

 ******************************************************************************/

acpi_status acpi_load_table(struct acpi_table_header *table)

{

	acpi_status status;

	u32 table_index;

	ACPI_FUNCTION_TRACE(acpi_load_table);

	/* Parameter validation */

	if (!table) {

		return_ACPI_STATUS(AE_BAD_PARAMETER);

	}

	/* Must acquire the interpreter lock during this operation */

	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* Install the table and load it into the namespace */

	ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),

						ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,

						TRUE, FALSE, &table_index);

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	if (ACPI_FAILURE(status)) {

		goto unlock_and_exit;

	}

	/*

	 * Note: Now table is "INSTALLED", it must be validated before

	 * using.

	 */

	status =

	    acpi_tb_validate_table(&acpi_gbl_root_table_list.

				   tables[table_index]);

	if (ACPI_FAILURE(status)) {

		goto unlock_and_exit;

	}

	status = acpi_ns_load_table(table_index, acpi_gbl_root_node);

	/* 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);

	}

unlock_and_exit:

	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);

	return_ACPI_STATUS(status);

}

ACPI_EXPORT_SYMBOL(acpi_load_table)

/*******************************************************************************

 *

 * FUNCTION:    acpi_unload_parent_table

 *

 * PARAMETERS:  object              - Handle to any namespace object owned by

 *                                    the table to be unloaded

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads

 *              the table and deletes all namespace objects associated with

 *              that table. Unloading of the DSDT is not allowed.

 *              Note: Mainly intended to support hotplug removal of SSDTs.

 *

 ******************************************************************************/

acpi_status acpi_unload_parent_table(acpi_handle object)

{

	struct acpi_namespace_node *node =

	    ACPI_CAST_PTR(struct acpi_namespace_node, object);

	acpi_status status = AE_NOT_EXIST;

	acpi_owner_id owner_id;

	u32 i;

	ACPI_FUNCTION_TRACE(acpi_unload_parent_table);

	/* Parameter validation */

	if (!object) {

		return_ACPI_STATUS(AE_BAD_PARAMETER);

	}

	/*

	 * The node owner_id is currently the same as the parent table ID.

	 * However, this could change in the future.

	 */

	owner_id = node->owner_id;

	if (!owner_id) {

		/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */

		return_ACPI_STATUS(AE_TYPE);

	}

	/* Must acquire the interpreter lock during this operation */

	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* Find the table in the global table list */

	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {

		if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {

			continue;

		}

		/*

		 * Allow unload of SSDT and OEMx tables only. Do not allow unload

		 * of the DSDT. No other types of tables should get here, since

		 * only these types can contain AML and thus are the only types

		 * that can create namespace objects.

		 */

		if (ACPI_COMPARE_NAME

		    (acpi_gbl_root_table_list.tables[i].signature.ascii,

		     ACPI_SIG_DSDT)) {

			status = AE_TYPE;

			break;

		}

		/* Ensure the table is actually loaded */

		if (!acpi_tb_is_table_loaded(i)) {

			status = AE_NOT_EXIST;

			break;

		}

		/* Invoke table handler if present */

		if (acpi_gbl_table_handler) {

			(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,

						     acpi_gbl_root_table_list.

						     tables[i].pointer,

						     acpi_gbl_table_handler_context);

		}

		/*

		 * Delete all namespace objects owned by this table. Note that

		 * these objects can appear anywhere in the namespace by virtue

		 * of the AML "Scope" operator. Thus, we need to track ownership

		 * by an ID, not simply a position within the hierarchy.

		 */

		status = acpi_tb_delete_namespace_by_owner(i);

		if (ACPI_FAILURE(status)) {

			break;

		}

		status = acpi_tb_release_owner_id(i);

		acpi_tb_set_table_loaded_flag(i, FALSE);

		break;

	}

	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);

	return_ACPI_STATUS(status);

}

ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)