[linux-2.6-block.git] / drivers / acpi / acpica / tbxfload.c

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

/*
 * Copyright (C) 2000 - 2013, 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 <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "actables.h"

#define _COMPONENT          ACPI_TABLES
ACPI_MODULE_NAME("tbxfload")

/* Local prototypes */
static acpi_status acpi_tb_load_namespace(void);

/*******************************************************************************
 *
 * 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();
	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.
 *
 ******************************************************************************/
static acpi_status acpi_tb_load_namespace(void)
{
	acpi_status status;
	u32 i;
	struct acpi_table_header *new_dsdt;

	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.
	 */
	if (!acpi_gbl_root_table_list.current_table_count ||
	    !ACPI_COMPARE_NAME(&
			       (acpi_gbl_root_table_list.
				tables[ACPI_TABLE_INDEX_DSDT].signature),
			       ACPI_SIG_DSDT)
	    ||
	    ACPI_FAILURE(acpi_tb_verify_table
			 (&acpi_gbl_root_table_list.
			  tables[ACPI_TABLE_INDEX_DSDT]))) {
		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_verify_table.
	 */
	acpi_gbl_DSDT =
	    acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].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_TABLE_INDEX_DSDT);
		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.
	 */
	ACPI_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_TABLE_INDEX_DSDT, acpi_gbl_root_node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* 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) {
		if ((!ACPI_COMPARE_NAME
		     (&(acpi_gbl_root_table_list.tables[i].signature),
		      ACPI_SIG_SSDT)
		     &&
		     !ACPI_COMPARE_NAME(&
					(acpi_gbl_root_table_list.tables[i].
					 signature), ACPI_SIG_PSDT))
		    ||
		    ACPI_FAILURE(acpi_tb_verify_table
				 (&acpi_gbl_root_table_list.tables[i]))) {
			continue;
		}

		/*
		 * Optionally do not load any SSDTs from the RSDT/XSDT. This can
		 * be useful for debugging ACPI problems on some machines.
		 */
		if (acpi_gbl_disable_ssdt_table_load) {
			ACPI_INFO((AE_INFO, "Ignoring %4.4s at %p",
				   acpi_gbl_root_table_list.tables[i].signature.
				   ascii, ACPI_CAST_PTR(void,
							acpi_gbl_root_table_list.
							tables[i].address)));
			continue;
		}

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

		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
		(void)acpi_ns_load_table(i, acpi_gbl_root_node);
		(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	}

	ACPI_INFO((AE_INFO, "All ACPI Tables successfully acquired"));

unlock_and_exit:
	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * 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;
	struct acpi_table_desc table_desc;
	u32 table_index;

	ACPI_FUNCTION_TRACE(acpi_load_table);

	/* Parameter validation */

	if (!table) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/* Init local table descriptor */

	ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
	table_desc.address = ACPI_PTR_TO_PHYSADDR(table);
	table_desc.pointer = table;
	table_desc.length = table->length;
	table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;

	/* 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:"));
	status = acpi_tb_add_table(&table_desc, &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)
Commit	Line	Data
d59b8ecd BM	1	/******************************************************************************
	2	*
	3	* Module Name: tbxfload - Table load/unload external interfaces
	4	*
	5	*****************************************************************************/
	6
	7	/*
25f044e6	8	* Copyright (C) 2000 - 2013, Intel Corp.
d59b8ecd BM	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
839e928f LZ	44	#define EXPORT_ACPI_INTERFACES
839e928f LZ	45
d59b8ecd BM	46	#include <acpi/acpi.h>
	47	#include "accommon.h"
	48	#include "acnamesp.h"
	49	#include "actables.h"
	50
	51	#define _COMPONENT ACPI_TABLES
	52	ACPI_MODULE_NAME("tbxfload")
	53
	54	/* Local prototypes */
	55	static acpi_status acpi_tb_load_namespace(void);
	56
d59b8ecd BM	57	/*******************************************************************************
	58	*
	59	* FUNCTION: acpi_load_tables
	60	*
	61	* PARAMETERS: None
	62	*
	63	* RETURN: Status
	64	*
	65	* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
	66	*
	67	******************************************************************************/
	68
45c9f78b	69	acpi_status __init acpi_load_tables(void)
d59b8ecd BM	70	{
	71	acpi_status status;
	72
	73	ACPI_FUNCTION_TRACE(acpi_load_tables);
	74
	75	/* Load the namespace from the tables */
	76
	77	status = acpi_tb_load_namespace();
	78	if (ACPI_FAILURE(status)) {
	79	ACPI_EXCEPTION((AE_INFO, status,
	80	"While loading namespace from ACPI tables"));
	81	}
	82
	83	return_ACPI_STATUS(status);
	84	}
	85
d21f600b	86	ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)
d59b8ecd BM	87
	88	/*******************************************************************************
	89	*
	90	* FUNCTION: acpi_tb_load_namespace
	91	*
	92	* PARAMETERS: None
	93	*
	94	* RETURN: Status
	95	*
	96	* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
	97	* the RSDT/XSDT.
	98	*
	99	******************************************************************************/
	100	static acpi_status acpi_tb_load_namespace(void)
	101	{
	102	acpi_status status;
	103	u32 i;
	104	struct acpi_table_header *new_dsdt;
	105
	106	ACPI_FUNCTION_TRACE(tb_load_namespace);
	107
	108	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	109
	110	/*
	111	* Load the namespace. The DSDT is required, but any SSDT and
	112	* PSDT tables are optional. Verify the DSDT.
	113	*/
	114	if (!acpi_gbl_root_table_list.current_table_count \|\|
	115	!ACPI_COMPARE_NAME(&
	116	(acpi_gbl_root_table_list.
	117	tables[ACPI_TABLE_INDEX_DSDT].signature),
	118	ACPI_SIG_DSDT)
	119	\|\|
	120	ACPI_FAILURE(acpi_tb_verify_table
	121	(&acpi_gbl_root_table_list.
	122	tables[ACPI_TABLE_INDEX_DSDT]))) {
	123	status = AE_NO_ACPI_TABLES;
	124	goto unlock_and_exit;
	125	}
	126
	127	/*
	128	* Save the DSDT pointer for simple access. This is the mapped memory
	129	* address. We must take care here because the address of the .Tables
	130	* array can change dynamically as tables are loaded at run-time. Note:
	131	* .Pointer field is not validated until after call to acpi_tb_verify_table.
	132	*/
	133	acpi_gbl_DSDT =
	134	acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;
	135
	136	/*
	137	* Optionally copy the entire DSDT to local memory (instead of simply
	138	* mapping it.) There are some BIOSs that corrupt or replace the original
	139	* DSDT, creating the need for this option. Default is FALSE, do not copy
	140	* the DSDT.
	141	*/
	142	if (acpi_gbl_copy_dsdt_locally) {
	143	new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
	144	if (new_dsdt) {
	145	acpi_gbl_DSDT = new_dsdt;
	146	}
	147	}
	148
	149	/*
	150	* Save the original DSDT header for detection of table corruption
151	* and/or replacement of the DSDT from outside the OS.
152	*/
153	ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
154	sizeof(struct acpi_table_header));
155
156	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
157
158	/* Load and parse tables */
159
160	status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
161	if (ACPI_FAILURE(status)) {
162	return_ACPI_STATUS(status);
163	}
164
165	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
166
167	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
168	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
169	if ((!ACPI_COMPARE_NAME
170	(&(acpi_gbl_root_table_list.tables[i].signature),
171	ACPI_SIG_SSDT)
172	&&
173	!ACPI_COMPARE_NAME(&
174	(acpi_gbl_root_table_list.tables[i].
175	signature), ACPI_SIG_PSDT))
176	\|\|
177	ACPI_FAILURE(acpi_tb_verify_table
178	(&acpi_gbl_root_table_list.tables[i]))) {
179	continue;
180	}
181
b75dd297 LZ	182	/*
	183	* Optionally do not load any SSDTs from the RSDT/XSDT. This can
	184	* be useful for debugging ACPI problems on some machines.
	185	*/
	186	if (acpi_gbl_disable_ssdt_table_load) {
	187	ACPI_INFO((AE_INFO, "Ignoring %4.4s at %p",
	188	acpi_gbl_root_table_list.tables[i].signature.
	189	ascii, ACPI_CAST_PTR(void,
	190	acpi_gbl_root_table_list.
	191	tables[i].address)));
d59b8ecd BM	192	continue;
	193	}
	194
	195	/* Ignore errors while loading tables, get as many as possible */
	196
	197	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	198	(void)acpi_ns_load_table(i, acpi_gbl_root_node);
	199	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	200	}
	201
3e5621a7	202	ACPI_INFO((AE_INFO, "All ACPI Tables successfully acquired"));
d59b8ecd	203
10622bf8	204	unlock_and_exit:
d59b8ecd BM	205	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	206	return_ACPI_STATUS(status);
	207	}
	208
f60d8181 BM	209	/*******************************************************************************
	210	*
	211	* FUNCTION: acpi_load_table
	212	*
	213	* PARAMETERS: table - Pointer to a buffer containing the ACPI
	214	* table to be loaded.
	215	*
	216	* RETURN: Status
	217	*
	218	* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
	219	* be a valid ACPI table with a valid ACPI table header.
	220	* Note1: Mainly intended to support hotplug addition of SSDTs.
691fda50	221	* Note2: Does not copy the incoming table. User is responsible
f60d8181 BM	222	* to ensure that the table is not deleted or unmapped.
	223	*
	224	******************************************************************************/
	225
	226	acpi_status acpi_load_table(struct acpi_table_header *table)
	227	{
	228	acpi_status status;
	229	struct acpi_table_desc table_desc;
	230	u32 table_index;
	231
	232	ACPI_FUNCTION_TRACE(acpi_load_table);
	233
	234	/* Parameter validation */
	235
	236	if (!table) {
	237	return_ACPI_STATUS(AE_BAD_PARAMETER);
	238	}
	239
	240	/* Init local table descriptor */
	241
	242	ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
	243	table_desc.address = ACPI_PTR_TO_PHYSADDR(table);
	244	table_desc.pointer = table;
	245	table_desc.length = table->length;
	246	table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;
	247
	248	/* Must acquire the interpreter lock during this operation */
	249
	250	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	251	if (ACPI_FAILURE(status)) {
	252	return_ACPI_STATUS(status);
	253	}
	254
	255	/* Install the table and load it into the namespace */
	256
	257	ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
	258	status = acpi_tb_add_table(&table_desc, &table_index);
	259	if (ACPI_FAILURE(status)) {
	260	goto unlock_and_exit;
	261	}
	262
	263	status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
	264
	265	/* Invoke table handler if present */
	266
	267	if (acpi_gbl_table_handler) {
	268	(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
	269	acpi_gbl_table_handler_context);
	270	}
	271
10622bf8	272	unlock_and_exit:
f60d8181 BM	273	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
	274	return_ACPI_STATUS(status);
	275	}
	276
	277	ACPI_EXPORT_SYMBOL(acpi_load_table)
	278
	279	/*******************************************************************************
	280	*
	281	* FUNCTION: acpi_unload_parent_table
	282	*
	283	* PARAMETERS: object - Handle to any namespace object owned by
	284	* the table to be unloaded
	285	*
	286	* RETURN: Status
	287	*
	288	* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
	289	* the table and deletes all namespace objects associated with
	290	* that table. Unloading of the DSDT is not allowed.
	291	* Note: Mainly intended to support hotplug removal of SSDTs.
	292	*
	293	******************************************************************************/
	294	acpi_status acpi_unload_parent_table(acpi_handle object)
	295	{
	296	struct acpi_namespace_node *node =
	297	ACPI_CAST_PTR(struct acpi_namespace_node, object);
	298	acpi_status status = AE_NOT_EXIST;
	299	acpi_owner_id owner_id;
	300	u32 i;
	301
	302	ACPI_FUNCTION_TRACE(acpi_unload_parent_table);
	303
	304	/* Parameter validation */
	305
	306	if (!object) {
	307	return_ACPI_STATUS(AE_BAD_PARAMETER);
	308	}
	309
	310	/*
	311	* The node owner_id is currently the same as the parent table ID.
	312	* However, this could change in the future.
	313	*/
	314	owner_id = node->owner_id;
	315	if (!owner_id) {
	316
	317	/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
	318
	319	return_ACPI_STATUS(AE_TYPE);
	320	}
	321
	322	/* Must acquire the interpreter lock during this operation */
	323
	324	status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
	325	if (ACPI_FAILURE(status)) {
	326	return_ACPI_STATUS(status);
	327	}
	328
	329	/* Find the table in the global table list */
	330
	331	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
	332	if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {
	333	continue;
	334	}
	335
	336	/*
337	* Allow unload of SSDT and OEMx tables only. Do not allow unload
338	* of the DSDT. No other types of tables should get here, since
339	* only these types can contain AML and thus are the only types
340	* that can create namespace objects.
341	*/
342	if (ACPI_COMPARE_NAME
343	(acpi_gbl_root_table_list.tables[i].signature.ascii,
344	ACPI_SIG_DSDT)) {
345	status = AE_TYPE;
346	break;
347	}
348
349	/* Ensure the table is actually loaded */
350
351	if (!acpi_tb_is_table_loaded(i)) {
352	status = AE_NOT_EXIST;
353	break;
354	}
355
356	/* Invoke table handler if present */
357
358	if (acpi_gbl_table_handler) {
359	(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
360	acpi_gbl_root_table_list.
361	tables[i].pointer,
362	acpi_gbl_table_handler_context);
363	}
364
365	/*
366	* Delete all namespace objects owned by this table. Note that
367	* these objects can appear anywhere in the namespace by virtue
368	* of the AML "Scope" operator. Thus, we need to track ownership
369	* by an ID, not simply a position within the hierarchy.
370	*/
371	status = acpi_tb_delete_namespace_by_owner(i);
372	if (ACPI_FAILURE(status)) {
373	break;
374	}
375
376	status = acpi_tb_release_owner_id(i);
377	acpi_tb_set_table_loaded_flag(i, FALSE);
378	break;
379	}
380
381	(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
382	return_ACPI_STATUS(status);
383	}
384
385	ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)