[mirror_ubuntu-artful-kernel.git] / drivers / acpi / acpica / utaddress.c

/******************************************************************************
 *
 * Module Name: utaddress - op_region address range check
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, 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 "accommon.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utaddress")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_add_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - op_region start address
 *              length              - op_region length
 *              region_node         - op_region namespace node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Add the Operation Region address range to the global list.
 *              The only supported Space IDs are Memory and I/O. Called when
 *              the op_region address/length operands are fully evaluated.
 *
 * MUTEX:       Locks the namespace
 *
 * NOTE: Because this interface is only called when an op_region argument
 * list is evaluated, there cannot be any duplicate region_nodes.
 * Duplicate Address/Length values are allowed, however, so that multiple
 * address conflicts can be detected.
 *
 ******************************************************************************/
acpi_status
acpi_ut_add_address_range(acpi_adr_space_type space_id,
			  acpi_physical_address address,
			  u32 length, struct acpi_namespace_node *region_node)
{
	struct acpi_address_range *range_info;

	ACPI_FUNCTION_TRACE(ut_add_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Allocate/init a new info block, add it to the appropriate list */

	range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
	if (!range_info) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	range_info->start_address = address;
	range_info->end_address = (address + length - 1);
	range_info->region_node = region_node;

	range_info->next = acpi_gbl_address_range_list[space_id];
	acpi_gbl_address_range_list[space_id] = range_info;

	ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
			  "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
			  acpi_ut_get_node_name(range_info->region_node),
			  ACPI_FORMAT_UINT64(address),
			  ACPI_FORMAT_UINT64(range_info->end_address)));

	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_remove_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              region_node         - op_region namespace node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Remove the Operation Region from the global list. The only
 *              supported Space IDs are Memory and I/O. Called when an
 *              op_region is deleted.
 *
 * MUTEX:       Assumes the namespace is locked
 *
 ******************************************************************************/

void
acpi_ut_remove_address_range(acpi_adr_space_type space_id,
			     struct acpi_namespace_node *region_node)
{
	struct acpi_address_range *range_info;
	struct acpi_address_range *prev;

	ACPI_FUNCTION_TRACE(ut_remove_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_VOID;
	}

	/* Get the appropriate list head and check the list */

	range_info = prev = acpi_gbl_address_range_list[space_id];
	while (range_info) {
		if (range_info->region_node == region_node) {
			if (range_info == prev) {	/* Found at list head */
				acpi_gbl_address_range_list[space_id] =
				    range_info->next;
			} else {
				prev->next = range_info->next;
			}

			ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
					  "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
					  acpi_ut_get_node_name(range_info->
								region_node),
					  ACPI_FORMAT_UINT64(range_info->
							     start_address),
					  ACPI_FORMAT_UINT64(range_info->
							     end_address)));

			ACPI_FREE(range_info);
			return_VOID;
		}

		prev = range_info;
		range_info = range_info->next;
	}

	return_VOID;
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_check_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - Start address
 *              length              - Length of address range
 *              warn                - TRUE if warning on overlap desired
 *
 * RETURN:      Count of the number of conflicts detected. Zero is always
 *              returned for Space IDs other than Memory or I/O.
 *
 * DESCRIPTION: Check if the input address range overlaps any of the
 *              ASL operation region address ranges. The only supported
 *              Space IDs are Memory and I/O.
 *
 * MUTEX:       Assumes the namespace is locked.
 *
 ******************************************************************************/

u32
acpi_ut_check_address_range(acpi_adr_space_type space_id,
			    acpi_physical_address address, u32 length, u8 warn)
{
	struct acpi_address_range *range_info;
	acpi_physical_address end_address;
	char *pathname;
	u32 overlap_count = 0;

	ACPI_FUNCTION_TRACE(ut_check_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_UINT32(0);
	}

	range_info = acpi_gbl_address_range_list[space_id];
	end_address = address + length - 1;

	/* Check entire list for all possible conflicts */

	while (range_info) {
		/*
		 * Check if the requested address/length overlaps this
		 * address range. There are four cases to consider:
		 *
		 * 1) Input address/length is contained completely in the
		 *    address range
		 * 2) Input address/length overlaps range at the range start
		 * 3) Input address/length overlaps range at the range end
		 * 4) Input address/length completely encompasses the range
		 */
		if ((address <= range_info->end_address) &&
		    (end_address >= range_info->start_address)) {

			/* Found an address range overlap */

			overlap_count++;
			if (warn) {	/* Optional warning message */
				pathname =
				    acpi_ns_get_normalized_pathname(range_info->
								    region_node,
								    TRUE);

				ACPI_WARNING((AE_INFO,
					      "%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
					      acpi_ut_get_region_name(space_id),
					      ACPI_FORMAT_UINT64(address),
					      ACPI_FORMAT_UINT64(end_address),
					      ACPI_FORMAT_UINT64(range_info->
								 start_address),
					      ACPI_FORMAT_UINT64(range_info->
								 end_address),
					      pathname));
				ACPI_FREE(pathname);
			}
		}

		range_info = range_info->next;
	}

	return_UINT32(overlap_count);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_address_lists
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete all global address range lists (called during
 *              subsystem shutdown).
 *
 ******************************************************************************/

void acpi_ut_delete_address_lists(void)
{
	struct acpi_address_range *next;
	struct acpi_address_range *range_info;
	int i;

	/* Delete all elements in all address range lists */

	for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
		next = acpi_gbl_address_range_list[i];

		while (next) {
			range_info = next;
			next = range_info->next;
			ACPI_FREE(range_info);
		}

		acpi_gbl_address_range_list[i] = NULL;
	}
}
Commit	Line	Data
f654c0fe LM	1	/******************************************************************************
	2	*
	3	* Module Name: utaddress - op_region address range check
	4	*
	5	*****************************************************************************/
	6
	7	/*
7735ca0e	8	* Copyright (C) 2000 - 2017, Intel Corp.
f654c0fe LM	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
	44	#include <acpi/acpi.h>
	45	#include "accommon.h"
	46	#include "acnamesp.h"
	47
	48	#define _COMPONENT ACPI_UTILITIES
	49	ACPI_MODULE_NAME("utaddress")
	50
	51	/*******************************************************************************
	52	*
	53	* FUNCTION: acpi_ut_add_address_range
	54	*
	55	* PARAMETERS: space_id - Address space ID
ba494bee BM	56	* address - op_region start address
ba494bee BM	57	* length - op_region length
f654c0fe LM	58	* region_node - op_region namespace node
	59	*
	60	* RETURN: Status
	61	*
	62	* DESCRIPTION: Add the Operation Region address range to the global list.
	63	* The only supported Space IDs are Memory and I/O. Called when
	64	* the op_region address/length operands are fully evaluated.
	65	*
	66	* MUTEX: Locks the namespace
	67	*
	68	* NOTE: Because this interface is only called when an op_region argument
	69	* list is evaluated, there cannot be any duplicate region_nodes.
	70	* Duplicate Address/Length values are allowed, however, so that multiple
	71	* address conflicts can be detected.
	72	*
	73	******************************************************************************/
	74	acpi_status
	75	acpi_ut_add_address_range(acpi_adr_space_type space_id,
	76	acpi_physical_address address,
	77	u32 length, struct acpi_namespace_node *region_node)
	78	{
	79	struct acpi_address_range *range_info;
f654c0fe LM	80
	81	ACPI_FUNCTION_TRACE(ut_add_address_range);
	82
	83	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	84	(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
	85	return_ACPI_STATUS(AE_OK);
	86	}
	87
	88	/* Allocate/init a new info block, add it to the appropriate list */
	89
	90	range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
	91	if (!range_info) {
	92	return_ACPI_STATUS(AE_NO_MEMORY);
	93	}
	94
	95	range_info->start_address = address;
	96	range_info->end_address = (address + length - 1);
	97	range_info->region_node = region_node;
	98
f654c0fe LM	99	range_info->next = acpi_gbl_address_range_list[space_id];
	100	acpi_gbl_address_range_list[space_id] = range_info;
	101
	102	ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
cc2080b0	103	"\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
f654c0fe	104	acpi_ut_get_node_name(range_info->region_node),
cc2080b0 LZ	105	ACPI_FORMAT_UINT64(address),
cc2080b0 LZ	106	ACPI_FORMAT_UINT64(range_info->end_address)));
f654c0fe	107
f654c0fe LM	108	return_ACPI_STATUS(AE_OK);
	109	}
	110
	111	/*******************************************************************************
	112	*
	113	* FUNCTION: acpi_ut_remove_address_range
	114	*
	115	* PARAMETERS: space_id - Address space ID
	116	* region_node - op_region namespace node
	117	*
	118	* RETURN: None
	119	*
	120	* DESCRIPTION: Remove the Operation Region from the global list. The only
	121	* supported Space IDs are Memory and I/O. Called when an
	122	* op_region is deleted.
	123	*
	124	* MUTEX: Assumes the namespace is locked
	125	*
	126	******************************************************************************/
	127
	128	void
	129	acpi_ut_remove_address_range(acpi_adr_space_type space_id,
	130	struct acpi_namespace_node *region_node)
	131	{
	132	struct acpi_address_range *range_info;
	133	struct acpi_address_range *prev;
	134
	135	ACPI_FUNCTION_TRACE(ut_remove_address_range);
	136
	137	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	138	(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
	139	return_VOID;
	140	}
	141
	142	/* Get the appropriate list head and check the list */
	143
	144	range_info = prev = acpi_gbl_address_range_list[space_id];
	145	while (range_info) {
	146	if (range_info->region_node == region_node) {
	147	if (range_info == prev) { /* Found at list head */
	148	acpi_gbl_address_range_list[space_id] =
	149	range_info->next;
	150	} else {
	151	prev->next = range_info->next;
	152	}
	153
	154	ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
cc2080b0	155	"\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
f654c0fe LM	156	acpi_ut_get_node_name(range_info->
f654c0fe LM	157	region_node),
cc2080b0 LZ	158	ACPI_FORMAT_UINT64(range_info->
	159	start_address),
	160	ACPI_FORMAT_UINT64(range_info->
	161	end_address)));
f654c0fe LM	162
	163	ACPI_FREE(range_info);
	164	return_VOID;
	165	}
	166
	167	prev = range_info;
	168	range_info = range_info->next;
	169	}
	170
	171	return_VOID;
	172	}
	173
	174	/*******************************************************************************
	175	*
	176	* FUNCTION: acpi_ut_check_address_range
	177	*
	178	* PARAMETERS: space_id - Address space ID
ba494bee BM	179	* address - Start address
	180	* length - Length of address range
	181	* warn - TRUE if warning on overlap desired
f654c0fe LM	182	*
	183	* RETURN: Count of the number of conflicts detected. Zero is always
	184	* returned for Space IDs other than Memory or I/O.
	185	*
	186	* DESCRIPTION: Check if the input address range overlaps any of the
	187	* ASL operation region address ranges. The only supported
	188	* Space IDs are Memory and I/O.
	189	*
	190	* MUTEX: Assumes the namespace is locked.
	191	*
	192	******************************************************************************/
	193
	194	u32
	195	acpi_ut_check_address_range(acpi_adr_space_type space_id,
	196	acpi_physical_address address, u32 length, u8 warn)
	197	{
	198	struct acpi_address_range *range_info;
	199	acpi_physical_address end_address;
	200	char *pathname;
	201	u32 overlap_count = 0;
	202
	203	ACPI_FUNCTION_TRACE(ut_check_address_range);
	204
	205	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	206	(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
fd1af712	207	return_UINT32(0);
f654c0fe LM	208	}
	209
	210	range_info = acpi_gbl_address_range_list[space_id];
	211	end_address = address + length - 1;
	212
	213	/* Check entire list for all possible conflicts */
	214
	215	while (range_info) {
	216	/*
0f607cb5 BM	217	* Check if the requested address/length overlaps this
0f607cb5 BM	218	* address range. There are four cases to consider:
f654c0fe	219	*
0f607cb5 BM	220	* 1) Input address/length is contained completely in the
0f607cb5 BM	221	* address range
f654c0fe LM	222	* 2) Input address/length overlaps range at the range start
	223	* 3) Input address/length overlaps range at the range end
	224	* 4) Input address/length completely encompasses the range
	225	*/
	226	if ((address <= range_info->end_address) &&
	227	(end_address >= range_info->start_address)) {
	228
	229	/* Found an address range overlap */
	230
	231	overlap_count++;
	232	if (warn) { /* Optional warning message */
	233	pathname =
0e166e4f LZ	234	acpi_ns_get_normalized_pathname(range_info->
	235	region_node,
	236	TRUE);
f654c0fe LM	237
f654c0fe LM	238	ACPI_WARNING((AE_INFO,
cc2080b0	239	"%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
0f607cb5	240	acpi_ut_get_region_name(space_id),
cc2080b0 LZ	241	ACPI_FORMAT_UINT64(address),
	242	ACPI_FORMAT_UINT64(end_address),
	243	ACPI_FORMAT_UINT64(range_info->
	244	start_address),
	245	ACPI_FORMAT_UINT64(range_info->
	246	end_address),
0f607cb5	247	pathname));
f654c0fe LM	248	ACPI_FREE(pathname);
	249	}
	250	}
	251
	252	range_info = range_info->next;
	253	}
	254
fd1af712	255	return_UINT32(overlap_count);
f654c0fe LM	256	}
	257
	258	/*******************************************************************************
	259	*
	260	* FUNCTION: acpi_ut_delete_address_lists
	261	*
	262	* PARAMETERS: None
	263	*
	264	* RETURN: None
	265	*
	266	* DESCRIPTION: Delete all global address range lists (called during
	267	* subsystem shutdown).
	268	*
	269	******************************************************************************/
	270
	271	void acpi_ut_delete_address_lists(void)
	272	{
	273	struct acpi_address_range *next;
	274	struct acpi_address_range *range_info;
	275	int i;
	276
	277	/* Delete all elements in all address range lists */
	278
	279	for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
	280	next = acpi_gbl_address_range_list[i];
	281
	282	while (next) {
	283	range_info = next;
	284	next = range_info->next;
	285	ACPI_FREE(range_info);
	286	}
	287
	288	acpi_gbl_address_range_list[i] = NULL;
	289	}
	290	}