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![Lv Zheng](/assets/img/avatar_default.png)
It is reported by kernel build test systems that all ACPICA source files in the kernel tree have incorrect label indentation. This patch changes default indent option used in the release process to fix this bug. Lv Zheng. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
536 lines
15 KiB
C
536 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: evhandler - Support for Address Space handlers
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, 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("evhandler")
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/* Local prototypes */
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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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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_has_default_handler
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*
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* PARAMETERS: node - Namespace node for the device
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* space_id - The address space ID
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*
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* RETURN: TRUE if default handler is installed, FALSE otherwise
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*
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* DESCRIPTION: Check if the default handler is installed for the requested
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* space ID.
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*
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******************************************************************************/
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u8
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acpi_ev_has_default_handler(struct acpi_namespace_node *node,
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acpi_adr_space_type space_id)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *handler_obj;
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/* Must have an existing internal object */
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obj_desc = acpi_ns_get_attached_object(node);
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if (obj_desc) {
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handler_obj = obj_desc->device.handler;
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/* Walk the linked list of handlers for this object */
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while (handler_obj) {
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if (handler_obj->address_space.space_id == space_id) {
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if (handler_obj->address_space.handler_flags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
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return (TRUE);
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}
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}
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handler_obj = handler_obj->address_space.next;
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}
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_install_handler
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*
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* PARAMETERS: walk_namespace callback
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*
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* DESCRIPTION: This routine installs an address handler into objects that are
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* of type Region or Device.
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*
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* If the Object is a Device, and the device has a handler of
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* the same type then the search is terminated in that branch.
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*
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* This is because the existing handler is closer in proximity
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* to any more regions than the one we are trying to install.
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*
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******************************************************************************/
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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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{
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union acpi_operand_object *handler_obj;
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union acpi_operand_object *next_handler_obj;
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union acpi_operand_object *obj_desc;
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struct acpi_namespace_node *node;
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acpi_status status;
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ACPI_FUNCTION_NAME(ev_install_handler);
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handler_obj = (union acpi_operand_object *)context;
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/* Parameter validation */
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if (!handler_obj) {
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return (AE_OK);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_validate_handle(obj_handle);
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if (!node) {
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return (AE_BAD_PARAMETER);
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}
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/*
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* We only care about regions and objects that are allowed to have
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* address space handlers
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*/
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if ((node->type != ACPI_TYPE_DEVICE) &&
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(node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
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return (AE_OK);
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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/* No object, just exit */
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return (AE_OK);
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}
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/* Devices are handled different than regions */
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if (obj_desc->common.type == ACPI_TYPE_DEVICE) {
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/* Check if this Device already has a handler for this address space */
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next_handler_obj = obj_desc->device.handler;
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while (next_handler_obj) {
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/* Found a handler, is it for the same address space? */
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if (next_handler_obj->address_space.space_id ==
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handler_obj->address_space.space_id) {
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Found handler for region [%s] in device %p(%p) "
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"handler %p\n",
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acpi_ut_get_region_name
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(handler_obj->address_space.
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space_id), obj_desc,
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next_handler_obj,
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handler_obj));
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/*
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* Since the object we found it on was a device, then it
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* means that someone has already installed a handler for
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* the branch of the namespace from this device on. Just
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* bail out telling the walk routine to not traverse this
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* branch. This preserves the scoping rule for handlers.
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*/
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return (AE_CTRL_DEPTH);
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}
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/* Walk the linked list of handlers attached to this device */
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next_handler_obj = next_handler_obj->address_space.next;
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}
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/*
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* As long as the device didn't have a handler for this space we
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* don't care about it. We just ignore it and proceed.
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*/
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return (AE_OK);
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}
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/* Object is a Region */
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if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
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/* This region is for a different address space, just ignore it */
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return (AE_OK);
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}
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/*
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* Now we have a region and it is for the handler's address space type.
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*
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* First disconnect region for any previous handler (if any)
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*/
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acpi_ev_detach_region(obj_desc, FALSE);
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/* Connect the region to the new handler */
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status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_install_space_handler
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*
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* PARAMETERS: node - Namespace node for the device
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* space_id - The address space ID
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* handler - Address of the handler
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* setup - Address of the setup function
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* context - Value passed to the handler on each access
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for all op_regions of a given space_id.
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* Assumes namespace is locked
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*
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******************************************************************************/
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acpi_status
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acpi_ev_install_space_handler(struct acpi_namespace_node * node,
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acpi_adr_space_type space_id,
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acpi_adr_space_handler handler,
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acpi_adr_space_setup setup, void *context)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *handler_obj;
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acpi_status status;
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acpi_object_type type;
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u8 flags = 0;
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ACPI_FUNCTION_TRACE(ev_install_space_handler);
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/*
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* This registration is valid for only the types below and the root. This
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* is where the default handlers get placed.
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*/
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if ((node->type != ACPI_TYPE_DEVICE) &&
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(node->type != ACPI_TYPE_PROCESSOR) &&
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(node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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if (handler == ACPI_DEFAULT_HANDLER) {
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flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
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switch (space_id) {
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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handler = acpi_ex_system_memory_space_handler;
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setup = acpi_ev_system_memory_region_setup;
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break;
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case ACPI_ADR_SPACE_SYSTEM_IO:
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handler = acpi_ex_system_io_space_handler;
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setup = acpi_ev_io_space_region_setup;
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break;
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case ACPI_ADR_SPACE_PCI_CONFIG:
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handler = acpi_ex_pci_config_space_handler;
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setup = acpi_ev_pci_config_region_setup;
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break;
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case ACPI_ADR_SPACE_CMOS:
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handler = acpi_ex_cmos_space_handler;
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setup = acpi_ev_cmos_region_setup;
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break;
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case ACPI_ADR_SPACE_PCI_BAR_TARGET:
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handler = acpi_ex_pci_bar_space_handler;
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setup = acpi_ev_pci_bar_region_setup;
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break;
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case ACPI_ADR_SPACE_DATA_TABLE:
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handler = acpi_ex_data_table_space_handler;
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setup = NULL;
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break;
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default:
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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}
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/* If the caller hasn't specified a setup routine, use the default */
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if (!setup) {
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setup = acpi_ev_default_region_setup;
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object(node);
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if (obj_desc) {
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/*
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* The attached device object already exists. Make sure the handler
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* is not already installed.
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*/
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handler_obj = obj_desc->device.handler;
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/* Walk the handler list for this device */
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while (handler_obj) {
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/* Same space_id indicates a handler already installed */
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if (handler_obj->address_space.space_id == space_id) {
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if (handler_obj->address_space.handler ==
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handler) {
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/*
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* It is (relatively) OK to attempt to install the SAME
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* handler twice. This can easily happen with the
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* PCI_Config space.
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*/
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status = AE_SAME_HANDLER;
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goto unlock_and_exit;
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} else {
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/* A handler is already installed */
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status = AE_ALREADY_EXISTS;
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}
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goto unlock_and_exit;
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}
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/* Walk the linked list of handlers */
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handler_obj = handler_obj->address_space.next;
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}
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Creating object on Device %p while installing handler\n",
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node));
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/* obj_desc does not exist, create one */
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if (node->type == ACPI_TYPE_ANY) {
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type = ACPI_TYPE_DEVICE;
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} else {
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type = node->type;
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}
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obj_desc = acpi_ut_create_internal_object(type);
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if (!obj_desc) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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/* Init new descriptor */
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obj_desc->common.type = (u8)type;
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/* Attach the new object to the Node */
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status = acpi_ns_attach_object(node, obj_desc, type);
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/* Remove local reference to the object */
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acpi_ut_remove_reference(obj_desc);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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}
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
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acpi_ut_get_region_name(space_id), space_id,
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acpi_ut_get_node_name(node), node, obj_desc));
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/*
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* Install the handler
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*
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* At this point there is no existing handler. Just allocate the object
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* for the handler and link it into the list.
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*/
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handler_obj =
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acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
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if (!handler_obj) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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/* Init handler obj */
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handler_obj->address_space.space_id = (u8)space_id;
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handler_obj->address_space.handler_flags = flags;
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handler_obj->address_space.region_list = NULL;
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handler_obj->address_space.node = node;
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handler_obj->address_space.handler = handler;
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handler_obj->address_space.context = context;
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handler_obj->address_space.setup = setup;
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/* Install at head of Device.address_space list */
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handler_obj->address_space.next = obj_desc->device.handler;
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/*
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* The Device object is the first reference on the handler_obj.
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* Each region that uses the handler adds a reference.
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*/
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obj_desc->device.handler = handler_obj;
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/*
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* Walk the namespace finding all of the regions this
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* handler will manage.
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*
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* Start at the device and search the branch toward
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* the leaf nodes until either the leaf is encountered or
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* a device is detected that has an address handler of the
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* same type.
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*
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* In either case, back up and search down the remainder
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* of the branch
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*/
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
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ACPI_NS_WALK_UNLOCK,
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acpi_ev_install_handler, NULL,
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handler_obj, NULL);
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unlock_and_exit:
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return_ACPI_STATUS(status);
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}
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