![Bob Moore](/assets/img/avatar_default.png)
Changed address parameter to a simple offset. This removes the need for the caller to access the region object to obtain the physical address. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
1074 lines
30 KiB
C
1074 lines
30 KiB
C
/******************************************************************************
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*
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* Module Name: evregion - ACPI address_space (op_region) handler dispatch
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acevents.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evregion")
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/* Local prototypes */
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static acpi_status
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acpi_ev_reg_run(acpi_handle obj_handle,
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u32 level, void *context, void **return_value);
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static acpi_status
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acpi_ev_install_handler(acpi_handle obj_handle,
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u32 level, void *context, void **return_value);
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/* These are the address spaces that will get default handlers */
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#define ACPI_NUM_DEFAULT_SPACES 4
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static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
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ACPI_ADR_SPACE_SYSTEM_MEMORY,
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ACPI_ADR_SPACE_SYSTEM_IO,
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ACPI_ADR_SPACE_PCI_CONFIG,
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ACPI_ADR_SPACE_DATA_TABLE
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};
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_install_region_handlers
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Installs the core subsystem default address space handlers.
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*
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******************************************************************************/
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acpi_status acpi_ev_install_region_handlers(void)
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{
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acpi_status status;
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u32 i;
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ACPI_FUNCTION_TRACE(ev_install_region_handlers);
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* All address spaces (PCI Config, EC, SMBus) are scope dependent and
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* registration must occur for a specific device.
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*
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* In the case of the system memory and IO address spaces there is
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* currently no device associated with the address space. For these we
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* use the root.
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*
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* We install the default PCI config space handler at the root so that
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* this space is immediately available even though the we have not
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* enumerated all the PCI Root Buses yet. This is to conform to the ACPI
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* specification which states that the PCI config space must be always
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* available -- even though we are nowhere near ready to find the PCI root
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* buses at this point.
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*
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* NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
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* has already been installed (via acpi_install_address_space_handler).
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* Similar for AE_SAME_HANDLER.
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*/
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for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
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status = acpi_ev_install_space_handler(acpi_gbl_root_node,
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acpi_gbl_default_address_spaces
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[i],
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ACPI_DEFAULT_HANDLER,
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NULL, NULL);
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switch (status) {
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case AE_OK:
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case AE_SAME_HANDLER:
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case AE_ALREADY_EXISTS:
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/* These exceptions are all OK */
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status = AE_OK;
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break;
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default:
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goto unlock_and_exit;
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}
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}
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_initialize_op_regions
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute _REG methods for all Operation Regions that have
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* an installed default region handler.
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*
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******************************************************************************/
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acpi_status acpi_ev_initialize_op_regions(void)
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{
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acpi_status status;
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u32 i;
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ACPI_FUNCTION_TRACE(ev_initialize_op_regions);
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Run the _REG methods for op_regions in each default address space */
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for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
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/*
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* TBD: Make sure handler is the DEFAULT handler, otherwise
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* _REG will have already been run.
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*/
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status = acpi_ev_execute_reg_methods(acpi_gbl_root_node,
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acpi_gbl_default_address_spaces
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[i]);
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}
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_execute_reg_method
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*
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* PARAMETERS: region_obj - Region object
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* Function - Passed to _REG: On (1) or Off (0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute _REG method for a region
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*
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******************************************************************************/
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acpi_status
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acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function)
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{
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struct acpi_evaluate_info *info;
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union acpi_operand_object *args[3];
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union acpi_operand_object *region_obj2;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_execute_reg_method);
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region_obj2 = acpi_ns_get_secondary_object(region_obj);
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if (!region_obj2) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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if (region_obj2->extra.method_REG == NULL) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Allocate and initialize the evaluation information block */
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info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
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if (!info) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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info->prefix_node = region_obj2->extra.method_REG;
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info->pathname = NULL;
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info->parameters = args;
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info->flags = ACPI_IGNORE_RETURN_VALUE;
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/*
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* The _REG method has two arguments:
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*
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* Arg0 - Integer:
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* Operation region space ID Same value as region_obj->Region.space_id
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*
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* Arg1 - Integer:
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* connection status 1 for connecting the handler, 0 for disconnecting
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* the handler (Passed as a parameter)
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*/
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args[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!args[0]) {
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status = AE_NO_MEMORY;
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goto cleanup1;
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}
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args[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!args[1]) {
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status = AE_NO_MEMORY;
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goto cleanup2;
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}
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/* Setup the parameter objects */
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args[0]->integer.value = region_obj->region.space_id;
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args[1]->integer.value = function;
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args[2] = NULL;
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/* Execute the method, no return value */
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ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
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(ACPI_TYPE_METHOD, info->prefix_node, NULL));
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status = acpi_ns_evaluate(info);
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acpi_ut_remove_reference(args[1]);
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cleanup2:
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acpi_ut_remove_reference(args[0]);
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cleanup1:
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ACPI_FREE(info);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_address_space_dispatch
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*
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* PARAMETERS: region_obj - Internal region object
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* Function - Read or Write operation
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* region_offset - Where in the region to read or write
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* bit_width - Field width in bits (8, 16, 32, or 64)
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* Value - Pointer to in or out value, must be
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* full 64-bit acpi_integer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dispatch an address space or operation region access to
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* a previously installed handler.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
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u32 function,
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u32 region_offset,
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u32 bit_width, acpi_integer * value)
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{
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acpi_status status;
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acpi_adr_space_handler handler;
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acpi_adr_space_setup region_setup;
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union acpi_operand_object *handler_desc;
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union acpi_operand_object *region_obj2;
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void *region_context = NULL;
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ACPI_FUNCTION_TRACE(ev_address_space_dispatch);
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region_obj2 = acpi_ns_get_secondary_object(region_obj);
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if (!region_obj2) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Ensure that there is a handler associated with this region */
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handler_desc = region_obj->region.handler;
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if (!handler_desc) {
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ACPI_ERROR((AE_INFO,
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"No handler for Region [%4.4s] (%p) [%s]",
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acpi_ut_get_node_name(region_obj->region.node),
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region_obj,
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acpi_ut_get_region_name(region_obj->region.
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space_id)));
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/*
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* It may be the case that the region has never been initialized.
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* Some types of regions require special init code
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*/
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if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
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/* This region has not been initialized yet, do it */
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region_setup = handler_desc->address_space.setup;
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if (!region_setup) {
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/* No initialization routine, exit with error */
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ACPI_ERROR((AE_INFO,
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"No init routine for region(%p) [%s]",
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region_obj,
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acpi_ut_get_region_name(region_obj->region.
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space_id)));
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/*
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* We must exit the interpreter because the region setup will
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* potentially execute control methods (for example, the _REG method
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* for this region)
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*/
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acpi_ex_exit_interpreter();
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status = region_setup(region_obj, ACPI_REGION_ACTIVATE,
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handler_desc->address_space.context,
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®ion_context);
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/* Re-enter the interpreter */
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acpi_ex_enter_interpreter();
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/* Check for failure of the Region Setup */
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During region initialization: [%s]",
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acpi_ut_get_region_name(region_obj->
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region.
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space_id)));
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return_ACPI_STATUS(status);
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}
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/* Region initialization may have been completed by region_setup */
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if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
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region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE;
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if (region_obj2->extra.region_context) {
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/* The handler for this region was already installed */
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ACPI_FREE(region_context);
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} else {
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/*
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* Save the returned context for use in all accesses to
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* this particular region
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*/
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region_obj2->extra.region_context =
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region_context;
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}
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}
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}
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/* We have everything we need, we can invoke the address space handler */
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handler = handler_desc->address_space.handler;
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
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®ion_obj->region.handler->address_space, handler,
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ACPI_FORMAT_NATIVE_UINT(region_obj->region.address +
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region_offset),
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acpi_ut_get_region_name(region_obj->region.
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space_id)));
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if (!(handler_desc->address_space.handler_flags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
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/*
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* For handlers other than the default (supplied) handlers, we must
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* exit the interpreter because the handler *might* block -- we don't
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* know what it will do, so we can't hold the lock on the intepreter.
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*/
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acpi_ex_exit_interpreter();
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}
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/* Call the handler */
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status = handler(function,
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(region_obj->region.address + region_offset),
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bit_width, value, handler_desc->address_space.context,
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region_obj2->extra.region_context);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]",
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acpi_ut_get_region_name(region_obj->region.
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space_id)));
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}
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if (!(handler_desc->address_space.handler_flags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
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/*
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* We just returned from a non-default handler, we must re-enter the
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* interpreter
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*/
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acpi_ex_enter_interpreter();
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}
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|
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return_ACPI_STATUS(status);
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}
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|
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_detach_region
|
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*
|
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* PARAMETERS: region_obj - Region Object
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* acpi_ns_is_locked - Namespace Region Already Locked?
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*
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* RETURN: None
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*
|
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* DESCRIPTION: Break the association between the handler and the region
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* this is a two way association.
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*
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******************************************************************************/
|
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|
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void
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acpi_ev_detach_region(union acpi_operand_object *region_obj,
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u8 acpi_ns_is_locked)
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{
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union acpi_operand_object *handler_obj;
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union acpi_operand_object *obj_desc;
|
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union acpi_operand_object **last_obj_ptr;
|
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acpi_adr_space_setup region_setup;
|
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void **region_context;
|
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union acpi_operand_object *region_obj2;
|
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acpi_status status;
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|
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ACPI_FUNCTION_TRACE(ev_detach_region);
|
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|
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region_obj2 = acpi_ns_get_secondary_object(region_obj);
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if (!region_obj2) {
|
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return_VOID;
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}
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region_context = ®ion_obj2->extra.region_context;
|
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|
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/* Get the address handler from the region object */
|
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|
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handler_obj = region_obj->region.handler;
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if (!handler_obj) {
|
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|
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/* This region has no handler, all done */
|
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return_VOID;
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}
|
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|
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/* Find this region in the handler's list */
|
|
|
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obj_desc = handler_obj->address_space.region_list;
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last_obj_ptr = &handler_obj->address_space.region_list;
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|
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while (obj_desc) {
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|
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/* Is this the correct Region? */
|
|
|
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if (obj_desc == region_obj) {
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
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"Removing Region %p from address handler %p\n",
|
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region_obj, handler_obj));
|
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/* This is it, remove it from the handler's list */
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*last_obj_ptr = obj_desc->region.next;
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obj_desc->region.next = NULL; /* Must clear field */
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|
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if (acpi_ns_is_locked) {
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status =
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acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
|
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return_VOID;
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}
|
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}
|
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|
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/* Now stop region accesses by executing the _REG method */
|
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|
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status = acpi_ev_execute_reg_method(region_obj, 0);
|
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if (ACPI_FAILURE(status)) {
|
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ACPI_EXCEPTION((AE_INFO, status,
|
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"from region _REG, [%s]",
|
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acpi_ut_get_region_name
|
|
(region_obj->region.space_id)));
|
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}
|
|
|
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if (acpi_ns_is_locked) {
|
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status =
|
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acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
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if (ACPI_FAILURE(status)) {
|
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return_VOID;
|
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}
|
|
}
|
|
|
|
/*
|
|
* If the region has been activated, call the setup handler with
|
|
* the deactivate notification
|
|
*/
|
|
if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
|
|
region_setup = handler_obj->address_space.setup;
|
|
status =
|
|
region_setup(region_obj,
|
|
ACPI_REGION_DEACTIVATE,
|
|
handler_obj->address_space.
|
|
context, region_context);
|
|
|
|
/* Init routine may fail, Just ignore errors */
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"from region handler - deactivate, [%s]",
|
|
acpi_ut_get_region_name
|
|
(region_obj->region.
|
|
space_id)));
|
|
}
|
|
|
|
region_obj->region.flags &=
|
|
~(AOPOBJ_SETUP_COMPLETE);
|
|
}
|
|
|
|
/*
|
|
* Remove handler reference in the region
|
|
*
|
|
* NOTE: this doesn't mean that the region goes away, the region
|
|
* is just inaccessible as indicated to the _REG method
|
|
*
|
|
* If the region is on the handler's list, this must be the
|
|
* region's handler
|
|
*/
|
|
region_obj->region.handler = NULL;
|
|
acpi_ut_remove_reference(handler_obj);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/* Walk the linked list of handlers */
|
|
|
|
last_obj_ptr = &obj_desc->region.next;
|
|
obj_desc = obj_desc->region.next;
|
|
}
|
|
|
|
/* If we get here, the region was not in the handler's region list */
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
|
"Cannot remove region %p from address handler %p\n",
|
|
region_obj, handler_obj));
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_attach_region
|
|
*
|
|
* PARAMETERS: handler_obj - Handler Object
|
|
* region_obj - Region Object
|
|
* acpi_ns_is_locked - Namespace Region Already Locked?
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Create the association between the handler and the region
|
|
* this is a two way association.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_attach_region(union acpi_operand_object *handler_obj,
|
|
union acpi_operand_object *region_obj,
|
|
u8 acpi_ns_is_locked)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE(ev_attach_region);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
|
"Adding Region [%4.4s] %p to address handler %p [%s]\n",
|
|
acpi_ut_get_node_name(region_obj->region.node),
|
|
region_obj, handler_obj,
|
|
acpi_ut_get_region_name(region_obj->region.
|
|
space_id)));
|
|
|
|
/* Link this region to the front of the handler's list */
|
|
|
|
region_obj->region.next = handler_obj->address_space.region_list;
|
|
handler_obj->address_space.region_list = region_obj;
|
|
|
|
/* Install the region's handler */
|
|
|
|
if (region_obj->region.handler) {
|
|
return_ACPI_STATUS(AE_ALREADY_EXISTS);
|
|
}
|
|
|
|
region_obj->region.handler = handler_obj;
|
|
acpi_ut_add_reference(handler_obj);
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_install_handler
|
|
*
|
|
* PARAMETERS: walk_namespace callback
|
|
*
|
|
* DESCRIPTION: This routine installs an address handler into objects that are
|
|
* of type Region or Device.
|
|
*
|
|
* If the Object is a Device, and the device has a handler of
|
|
* the same type then the search is terminated in that branch.
|
|
*
|
|
* This is because the existing handler is closer in proximity
|
|
* to any more regions than the one we are trying to install.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ev_install_handler(acpi_handle obj_handle,
|
|
u32 level, void *context, void **return_value)
|
|
{
|
|
union acpi_operand_object *handler_obj;
|
|
union acpi_operand_object *next_handler_obj;
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_namespace_node *node;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_NAME(ev_install_handler);
|
|
|
|
handler_obj = (union acpi_operand_object *)context;
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!handler_obj) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
node = acpi_ns_map_handle_to_node(obj_handle);
|
|
if (!node) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We only care about regions and objects that are allowed to have
|
|
* address space handlers
|
|
*/
|
|
if ((node->type != ACPI_TYPE_DEVICE) &&
|
|
(node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
|
|
/* No object, just exit */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Devices are handled different than regions */
|
|
|
|
if (obj_desc->common.type == ACPI_TYPE_DEVICE) {
|
|
|
|
/* Check if this Device already has a handler for this address space */
|
|
|
|
next_handler_obj = obj_desc->device.handler;
|
|
while (next_handler_obj) {
|
|
|
|
/* Found a handler, is it for the same address space? */
|
|
|
|
if (next_handler_obj->address_space.space_id ==
|
|
handler_obj->address_space.space_id) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
|
"Found handler for region [%s] in device %p(%p) "
|
|
"handler %p\n",
|
|
acpi_ut_get_region_name
|
|
(handler_obj->address_space.
|
|
space_id), obj_desc,
|
|
next_handler_obj,
|
|
handler_obj));
|
|
|
|
/*
|
|
* Since the object we found it on was a device, then it
|
|
* means that someone has already installed a handler for
|
|
* the branch of the namespace from this device on. Just
|
|
* bail out telling the walk routine to not traverse this
|
|
* branch. This preserves the scoping rule for handlers.
|
|
*/
|
|
return (AE_CTRL_DEPTH);
|
|
}
|
|
|
|
/* Walk the linked list of handlers attached to this device */
|
|
|
|
next_handler_obj = next_handler_obj->address_space.next;
|
|
}
|
|
|
|
/*
|
|
* As long as the device didn't have a handler for this space we
|
|
* don't care about it. We just ignore it and proceed.
|
|
*/
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Object is a Region */
|
|
|
|
if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
|
|
|
|
/* This region is for a different address space, just ignore it */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Now we have a region and it is for the handler's address space type.
|
|
*
|
|
* First disconnect region for any previous handler (if any)
|
|
*/
|
|
acpi_ev_detach_region(obj_desc, FALSE);
|
|
|
|
/* Connect the region to the new handler */
|
|
|
|
status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
|
|
return (status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_install_space_handler
|
|
*
|
|
* PARAMETERS: Node - Namespace node for the device
|
|
* space_id - The address space ID
|
|
* Handler - Address of the handler
|
|
* Setup - Address of the setup function
|
|
* Context - Value passed to the handler on each access
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for all op_regions of a given space_id.
|
|
* Assumes namespace is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_install_space_handler(struct acpi_namespace_node * node,
|
|
acpi_adr_space_type space_id,
|
|
acpi_adr_space_handler handler,
|
|
acpi_adr_space_setup setup, void *context)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
union acpi_operand_object *handler_obj;
|
|
acpi_status status;
|
|
acpi_object_type type;
|
|
u8 flags = 0;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_install_space_handler);
|
|
|
|
/*
|
|
* This registration is valid for only the types below and the root. This
|
|
* is where the default handlers get placed.
|
|
*/
|
|
if ((node->type != ACPI_TYPE_DEVICE) &&
|
|
(node->type != ACPI_TYPE_PROCESSOR) &&
|
|
(node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
if (handler == ACPI_DEFAULT_HANDLER) {
|
|
flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
|
|
|
|
switch (space_id) {
|
|
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
|
|
handler = acpi_ex_system_memory_space_handler;
|
|
setup = acpi_ev_system_memory_region_setup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_SYSTEM_IO:
|
|
handler = acpi_ex_system_io_space_handler;
|
|
setup = acpi_ev_io_space_region_setup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_PCI_CONFIG:
|
|
handler = acpi_ex_pci_config_space_handler;
|
|
setup = acpi_ev_pci_config_region_setup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_CMOS:
|
|
handler = acpi_ex_cmos_space_handler;
|
|
setup = acpi_ev_cmos_region_setup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_PCI_BAR_TARGET:
|
|
handler = acpi_ex_pci_bar_space_handler;
|
|
setup = acpi_ev_pci_bar_region_setup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_DATA_TABLE:
|
|
handler = acpi_ex_data_table_space_handler;
|
|
setup = NULL;
|
|
break;
|
|
|
|
default:
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
/* If the caller hasn't specified a setup routine, use the default */
|
|
|
|
if (!setup) {
|
|
setup = acpi_ev_default_region_setup;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (obj_desc) {
|
|
/*
|
|
* The attached device object already exists. Make sure the handler
|
|
* is not already installed.
|
|
*/
|
|
handler_obj = obj_desc->device.handler;
|
|
|
|
/* Walk the handler list for this device */
|
|
|
|
while (handler_obj) {
|
|
|
|
/* Same space_id indicates a handler already installed */
|
|
|
|
if (handler_obj->address_space.space_id == space_id) {
|
|
if (handler_obj->address_space.handler ==
|
|
handler) {
|
|
/*
|
|
* It is (relatively) OK to attempt to install the SAME
|
|
* handler twice. This can easily happen with the
|
|
* PCI_Config space.
|
|
*/
|
|
status = AE_SAME_HANDLER;
|
|
goto unlock_and_exit;
|
|
} else {
|
|
/* A handler is already installed */
|
|
|
|
status = AE_ALREADY_EXISTS;
|
|
}
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Walk the linked list of handlers */
|
|
|
|
handler_obj = handler_obj->address_space.next;
|
|
}
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
|
"Creating object on Device %p while installing handler\n",
|
|
node));
|
|
|
|
/* obj_desc does not exist, create one */
|
|
|
|
if (node->type == ACPI_TYPE_ANY) {
|
|
type = ACPI_TYPE_DEVICE;
|
|
} else {
|
|
type = node->type;
|
|
}
|
|
|
|
obj_desc = acpi_ut_create_internal_object(type);
|
|
if (!obj_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Init new descriptor */
|
|
|
|
obj_desc->common.type = (u8) type;
|
|
|
|
/* Attach the new object to the Node */
|
|
|
|
status = acpi_ns_attach_object(node, obj_desc, type);
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
|
|
"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
|
|
acpi_ut_get_region_name(space_id), space_id,
|
|
acpi_ut_get_node_name(node), node, obj_desc));
|
|
|
|
/*
|
|
* Install the handler
|
|
*
|
|
* At this point there is no existing handler. Just allocate the object
|
|
* for the handler and link it into the list.
|
|
*/
|
|
handler_obj =
|
|
acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
|
|
if (!handler_obj) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Init handler obj */
|
|
|
|
handler_obj->address_space.space_id = (u8) space_id;
|
|
handler_obj->address_space.handler_flags = flags;
|
|
handler_obj->address_space.region_list = NULL;
|
|
handler_obj->address_space.node = node;
|
|
handler_obj->address_space.handler = handler;
|
|
handler_obj->address_space.context = context;
|
|
handler_obj->address_space.setup = setup;
|
|
|
|
/* Install at head of Device.address_space list */
|
|
|
|
handler_obj->address_space.next = obj_desc->device.handler;
|
|
|
|
/*
|
|
* The Device object is the first reference on the handler_obj.
|
|
* Each region that uses the handler adds a reference.
|
|
*/
|
|
obj_desc->device.handler = handler_obj;
|
|
|
|
/*
|
|
* Walk the namespace finding all of the regions this
|
|
* handler will manage.
|
|
*
|
|
* Start at the device and search the branch toward
|
|
* the leaf nodes until either the leaf is encountered or
|
|
* a device is detected that has an address handler of the
|
|
* same type.
|
|
*
|
|
* In either case, back up and search down the remainder
|
|
* of the branch
|
|
*/
|
|
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
|
|
ACPI_NS_WALK_UNLOCK,
|
|
acpi_ev_install_handler, handler_obj,
|
|
NULL);
|
|
|
|
unlock_and_exit:
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_execute_reg_methods
|
|
*
|
|
* PARAMETERS: Node - Namespace node for the device
|
|
* space_id - The address space ID
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Run all _REG methods for the input Space ID;
|
|
* Note: assumes namespace is locked, or system init time.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
|
|
acpi_adr_space_type space_id)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_execute_reg_methods);
|
|
|
|
/*
|
|
* Run all _REG methods for all Operation Regions for this space ID. This
|
|
* is a separate walk in order to handle any interdependencies between
|
|
* regions and _REG methods. (i.e. handlers must be installed for all
|
|
* regions of this Space ID before we can run any _REG methods)
|
|
*/
|
|
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
|
|
ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run,
|
|
&space_id, NULL);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_reg_run
|
|
*
|
|
* PARAMETERS: walk_namespace callback
|
|
*
|
|
* DESCRIPTION: Run _REG method for region objects of the requested space_iD
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ev_reg_run(acpi_handle obj_handle,
|
|
u32 level, void *context, void **return_value)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_namespace_node *node;
|
|
acpi_adr_space_type space_id;
|
|
acpi_status status;
|
|
|
|
space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context);
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
node = acpi_ns_map_handle_to_node(obj_handle);
|
|
if (!node) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We only care about regions.and objects that are allowed to have address
|
|
* space handlers
|
|
*/
|
|
if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
|
|
/* No object, just exit */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Object is a Region */
|
|
|
|
if (obj_desc->region.space_id != space_id) {
|
|
|
|
/* This region is for a different address space, just ignore it */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
status = acpi_ev_execute_reg_method(obj_desc, 1);
|
|
return (status);
|
|
}
|