257 lines
7.6 KiB
C
257 lines
7.6 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: utaddress - op_region address range check
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*
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* Copyright (C) 2000 - 2018, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utaddress")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_add_address_range
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*
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* PARAMETERS: space_id - Address space ID
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* address - op_region start address
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* length - op_region length
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* region_node - op_region namespace node
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*
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* RETURN: Status
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*
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* DESCRIPTION: Add the Operation Region address range to the global list.
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* The only supported Space IDs are Memory and I/O. Called when
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* the op_region address/length operands are fully evaluated.
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*
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* MUTEX: Locks the namespace
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*
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* NOTE: Because this interface is only called when an op_region argument
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* list is evaluated, there cannot be any duplicate region_nodes.
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* Duplicate Address/Length values are allowed, however, so that multiple
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* address conflicts can be detected.
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*
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******************************************************************************/
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acpi_status
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acpi_ut_add_address_range(acpi_adr_space_type space_id,
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acpi_physical_address address,
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u32 length, struct acpi_namespace_node *region_node)
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{
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struct acpi_address_range *range_info;
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ACPI_FUNCTION_TRACE(ut_add_address_range);
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if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Allocate/init a new info block, add it to the appropriate list */
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range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
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if (!range_info) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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range_info->start_address = address;
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range_info->end_address = (address + length - 1);
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range_info->region_node = region_node;
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range_info->next = acpi_gbl_address_range_list[space_id];
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acpi_gbl_address_range_list[space_id] = range_info;
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ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
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"\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
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acpi_ut_get_node_name(range_info->region_node),
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ACPI_FORMAT_UINT64(address),
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ACPI_FORMAT_UINT64(range_info->end_address)));
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_remove_address_range
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*
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* PARAMETERS: space_id - Address space ID
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* region_node - op_region namespace node
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*
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* RETURN: None
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*
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* DESCRIPTION: Remove the Operation Region from the global list. The only
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* supported Space IDs are Memory and I/O. Called when an
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* op_region is deleted.
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*
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* MUTEX: Assumes the namespace is locked
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*
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******************************************************************************/
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void
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acpi_ut_remove_address_range(acpi_adr_space_type space_id,
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struct acpi_namespace_node *region_node)
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{
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struct acpi_address_range *range_info;
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struct acpi_address_range *prev;
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ACPI_FUNCTION_TRACE(ut_remove_address_range);
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if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
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return_VOID;
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}
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/* Get the appropriate list head and check the list */
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range_info = prev = acpi_gbl_address_range_list[space_id];
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while (range_info) {
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if (range_info->region_node == region_node) {
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if (range_info == prev) { /* Found at list head */
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acpi_gbl_address_range_list[space_id] =
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range_info->next;
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} else {
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prev->next = range_info->next;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
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"\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
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acpi_ut_get_node_name(range_info->
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region_node),
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ACPI_FORMAT_UINT64(range_info->
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start_address),
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ACPI_FORMAT_UINT64(range_info->
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end_address)));
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ACPI_FREE(range_info);
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return_VOID;
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}
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prev = range_info;
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range_info = range_info->next;
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_check_address_range
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*
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* PARAMETERS: space_id - Address space ID
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* address - Start address
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* length - Length of address range
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* warn - TRUE if warning on overlap desired
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*
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* RETURN: Count of the number of conflicts detected. Zero is always
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* returned for Space IDs other than Memory or I/O.
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*
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* DESCRIPTION: Check if the input address range overlaps any of the
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* ASL operation region address ranges. The only supported
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* Space IDs are Memory and I/O.
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*
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* MUTEX: Assumes the namespace is locked.
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*
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******************************************************************************/
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u32
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acpi_ut_check_address_range(acpi_adr_space_type space_id,
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acpi_physical_address address, u32 length, u8 warn)
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{
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struct acpi_address_range *range_info;
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acpi_physical_address end_address;
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char *pathname;
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u32 overlap_count = 0;
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ACPI_FUNCTION_TRACE(ut_check_address_range);
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if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
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return_UINT32(0);
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}
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range_info = acpi_gbl_address_range_list[space_id];
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end_address = address + length - 1;
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/* Check entire list for all possible conflicts */
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while (range_info) {
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/*
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* Check if the requested address/length overlaps this
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* address range. There are four cases to consider:
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*
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* 1) Input address/length is contained completely in the
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* address range
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* 2) Input address/length overlaps range at the range start
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* 3) Input address/length overlaps range at the range end
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* 4) Input address/length completely encompasses the range
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*/
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if ((address <= range_info->end_address) &&
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(end_address >= range_info->start_address)) {
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/* Found an address range overlap */
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overlap_count++;
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if (warn) { /* Optional warning message */
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pathname =
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acpi_ns_get_normalized_pathname(range_info->
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region_node,
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TRUE);
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ACPI_WARNING((AE_INFO,
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"%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)",
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acpi_ut_get_region_name(space_id),
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ACPI_FORMAT_UINT64(address),
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ACPI_FORMAT_UINT64(end_address),
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ACPI_FORMAT_UINT64(range_info->
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start_address),
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ACPI_FORMAT_UINT64(range_info->
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end_address),
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pathname));
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ACPI_FREE(pathname);
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}
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}
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range_info = range_info->next;
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}
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return_UINT32(overlap_count);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_address_lists
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete all global address range lists (called during
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* subsystem shutdown).
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*
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******************************************************************************/
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void acpi_ut_delete_address_lists(void)
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{
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struct acpi_address_range *next;
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struct acpi_address_range *range_info;
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int i;
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/* Delete all elements in all address range lists */
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for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
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next = acpi_gbl_address_range_list[i];
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while (next) {
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range_info = next;
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next = range_info->next;
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ACPI_FREE(range_info);
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}
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acpi_gbl_address_range_list[i] = NULL;
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}
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}
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