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1275 |
phoenix |
/******************************************************************************
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*
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* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
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* Address Spaces.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2004, R. Byron Moore
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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 <acpi/acnamesp.h>
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| 48 |
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#include <acpi/acevents.h>
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| 49 |
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxfregn")
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_address_space_handler
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*
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* PARAMETERS: Device - Handle 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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*
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******************************************************************************/
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acpi_status
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acpi_install_address_space_handler (
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acpi_handle device,
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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,
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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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struct acpi_namespace_node *node;
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acpi_status status;
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acpi_object_type type;
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u16 flags = 0;
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ACPI_FUNCTION_TRACE ("acpi_install_address_space_handler");
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/* Parameter validation */
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if (!device) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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| 97 |
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node (device);
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if (!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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/*
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* This registration is valid for only the types below
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* and the root. This is where the default handlers
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* 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) &&
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(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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| 122 |
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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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| 131 |
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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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| 135 |
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| 136 |
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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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| 140 |
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| 141 |
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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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| 145 |
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| 146 |
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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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| 150 |
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| 151 |
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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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| 156 |
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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.
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* Make sure the handler 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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| 180 |
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while (handler_obj) {
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/* Same space_id indicates a handler already installed */
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| 182 |
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if(handler_obj->address_space.space_id == space_id) {
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if (handler_obj->address_space.handler == handler) {
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/*
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| 186 |
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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 PCI_Config space.
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| 188 |
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*/
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| 189 |
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status = AE_SAME_HANDLER;
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| 190 |
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goto unlock_and_exit;
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| 191 |
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}
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| 192 |
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else {
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/* A handler is already installed */
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| 194 |
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| 195 |
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status = AE_ALREADY_EXISTS;
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}
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| 197 |
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goto unlock_and_exit;
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| 198 |
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}
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| 199 |
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| 200 |
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/* Walk the linked list of handlers */
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| 201 |
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|
| 202 |
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handler_obj = handler_obj->address_space.next;
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| 203 |
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}
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| 204 |
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}
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| 205 |
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else {
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| 206 |
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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| 207 |
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"Creating object on Device %p while installing handler\n", node));
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| 208 |
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|
| 209 |
|
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/* obj_desc does not exist, create one */
|
| 210 |
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|
|
| 211 |
|
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if (node->type == ACPI_TYPE_ANY) {
|
| 212 |
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type = ACPI_TYPE_DEVICE;
|
| 213 |
|
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}
|
| 214 |
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else {
|
| 215 |
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type = node->type;
|
| 216 |
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}
|
| 217 |
|
|
|
| 218 |
|
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obj_desc = acpi_ut_create_internal_object (type);
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| 219 |
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if (!obj_desc) {
|
| 220 |
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status = AE_NO_MEMORY;
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| 221 |
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goto unlock_and_exit;
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| 222 |
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}
|
| 223 |
|
|
|
| 224 |
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/* Init new descriptor */
|
| 225 |
|
|
|
| 226 |
|
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obj_desc->common.type = (u8) type;
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| 227 |
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|
|
| 228 |
|
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/* Attach the new object to the Node */
|
| 229 |
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|
| 230 |
|
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status = acpi_ns_attach_object (node, obj_desc, type);
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| 231 |
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|
|
| 232 |
|
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/* Remove local reference to the object */
|
| 233 |
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|
|
| 234 |
|
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acpi_ut_remove_reference (obj_desc);
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| 235 |
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|
| 236 |
|
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if (ACPI_FAILURE (status)) {
|
| 237 |
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goto unlock_and_exit;
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| 238 |
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}
|
| 239 |
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}
|
| 240 |
|
|
|
| 241 |
|
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
| 242 |
|
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"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
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| 243 |
|
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acpi_ut_get_region_name (space_id), space_id,
|
| 244 |
|
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acpi_ut_get_node_name (node), node, obj_desc));
|
| 245 |
|
|
|
| 246 |
|
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/*
|
| 247 |
|
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* Install the handler
|
| 248 |
|
|
*
|
| 249 |
|
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* At this point there is no existing handler.
|
| 250 |
|
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* Just allocate the object for the handler and link it
|
| 251 |
|
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* into the list.
|
| 252 |
|
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*/
|
| 253 |
|
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handler_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
|
| 254 |
|
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if (!handler_obj) {
|
| 255 |
|
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status = AE_NO_MEMORY;
|
| 256 |
|
|
goto unlock_and_exit;
|
| 257 |
|
|
}
|
| 258 |
|
|
|
| 259 |
|
|
/* Init handler obj */
|
| 260 |
|
|
|
| 261 |
|
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handler_obj->address_space.space_id = (u8) space_id;
|
| 262 |
|
|
handler_obj->address_space.hflags = flags;
|
| 263 |
|
|
handler_obj->address_space.region_list = NULL;
|
| 264 |
|
|
handler_obj->address_space.node = node;
|
| 265 |
|
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handler_obj->address_space.handler = handler;
|
| 266 |
|
|
handler_obj->address_space.context = context;
|
| 267 |
|
|
handler_obj->address_space.setup = setup;
|
| 268 |
|
|
|
| 269 |
|
|
/* Install at head of Device.address_space list */
|
| 270 |
|
|
|
| 271 |
|
|
handler_obj->address_space.next = obj_desc->device.handler;
|
| 272 |
|
|
|
| 273 |
|
|
/*
|
| 274 |
|
|
* The Device object is the first reference on the handler_obj.
|
| 275 |
|
|
* Each region that uses the handler adds a reference.
|
| 276 |
|
|
*/
|
| 277 |
|
|
obj_desc->device.handler = handler_obj;
|
| 278 |
|
|
|
| 279 |
|
|
/*
|
| 280 |
|
|
* Walk the namespace finding all of the regions this
|
| 281 |
|
|
* handler will manage.
|
| 282 |
|
|
*
|
| 283 |
|
|
* Start at the device and search the branch toward
|
| 284 |
|
|
* the leaf nodes until either the leaf is encountered or
|
| 285 |
|
|
* a device is detected that has an address handler of the
|
| 286 |
|
|
* same type.
|
| 287 |
|
|
*
|
| 288 |
|
|
* In either case, back up and search down the remainder
|
| 289 |
|
|
* of the branch
|
| 290 |
|
|
*/
|
| 291 |
|
|
status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, device, ACPI_UINT32_MAX,
|
| 292 |
|
|
ACPI_NS_WALK_UNLOCK, acpi_ev_install_handler,
|
| 293 |
|
|
handler_obj, NULL);
|
| 294 |
|
|
|
| 295 |
|
|
/*
|
| 296 |
|
|
* Now we can run the _REG methods for all Regions for this
|
| 297 |
|
|
* space ID. This is a separate walk in order to handle any
|
| 298 |
|
|
* interdependencies between regions and _REG methods. (i.e. handlers
|
| 299 |
|
|
* must be installed for all regions of this Space ID before we
|
| 300 |
|
|
* can run any _REG methods.
|
| 301 |
|
|
*/
|
| 302 |
|
|
status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, device, ACPI_UINT32_MAX,
|
| 303 |
|
|
ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run,
|
| 304 |
|
|
handler_obj, NULL);
|
| 305 |
|
|
|
| 306 |
|
|
unlock_and_exit:
|
| 307 |
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
| 308 |
|
|
return_ACPI_STATUS (status);
|
| 309 |
|
|
}
|
| 310 |
|
|
|
| 311 |
|
|
|
| 312 |
|
|
/*******************************************************************************
|
| 313 |
|
|
*
|
| 314 |
|
|
* FUNCTION: acpi_remove_address_space_handler
|
| 315 |
|
|
*
|
| 316 |
|
|
* PARAMETERS: Device - Handle for the device
|
| 317 |
|
|
* space_id - The address space ID
|
| 318 |
|
|
* Handler - Address of the handler
|
| 319 |
|
|
*
|
| 320 |
|
|
* RETURN: Status
|
| 321 |
|
|
*
|
| 322 |
|
|
* DESCRIPTION: Remove a previously installed handler.
|
| 323 |
|
|
*
|
| 324 |
|
|
******************************************************************************/
|
| 325 |
|
|
|
| 326 |
|
|
acpi_status
|
| 327 |
|
|
acpi_remove_address_space_handler (
|
| 328 |
|
|
acpi_handle device,
|
| 329 |
|
|
acpi_adr_space_type space_id,
|
| 330 |
|
|
acpi_adr_space_handler handler)
|
| 331 |
|
|
{
|
| 332 |
|
|
union acpi_operand_object *obj_desc;
|
| 333 |
|
|
union acpi_operand_object *handler_obj;
|
| 334 |
|
|
union acpi_operand_object *region_obj;
|
| 335 |
|
|
union acpi_operand_object **last_obj_ptr;
|
| 336 |
|
|
struct acpi_namespace_node *node;
|
| 337 |
|
|
acpi_status status;
|
| 338 |
|
|
|
| 339 |
|
|
|
| 340 |
|
|
ACPI_FUNCTION_TRACE ("acpi_remove_address_space_handler");
|
| 341 |
|
|
|
| 342 |
|
|
|
| 343 |
|
|
/* Parameter validation */
|
| 344 |
|
|
|
| 345 |
|
|
if (!device) {
|
| 346 |
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
| 347 |
|
|
}
|
| 348 |
|
|
|
| 349 |
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
| 350 |
|
|
if (ACPI_FAILURE (status)) {
|
| 351 |
|
|
return_ACPI_STATUS (status);
|
| 352 |
|
|
}
|
| 353 |
|
|
|
| 354 |
|
|
/* Convert and validate the device handle */
|
| 355 |
|
|
|
| 356 |
|
|
node = acpi_ns_map_handle_to_node (device);
|
| 357 |
|
|
if (!node) {
|
| 358 |
|
|
status = AE_BAD_PARAMETER;
|
| 359 |
|
|
goto unlock_and_exit;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
/* Make sure the internal object exists */
|
| 363 |
|
|
|
| 364 |
|
|
obj_desc = acpi_ns_get_attached_object (node);
|
| 365 |
|
|
if (!obj_desc) {
|
| 366 |
|
|
status = AE_NOT_EXIST;
|
| 367 |
|
|
goto unlock_and_exit;
|
| 368 |
|
|
}
|
| 369 |
|
|
|
| 370 |
|
|
/* Find the address handler the user requested */
|
| 371 |
|
|
|
| 372 |
|
|
handler_obj = obj_desc->device.handler;
|
| 373 |
|
|
last_obj_ptr = &obj_desc->device.handler;
|
| 374 |
|
|
while (handler_obj) {
|
| 375 |
|
|
/* We have a handler, see if user requested this one */
|
| 376 |
|
|
|
| 377 |
|
|
if (handler_obj->address_space.space_id == space_id) {
|
| 378 |
|
|
/* Matched space_id, first dereference this in the Regions */
|
| 379 |
|
|
|
| 380 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
| 381 |
|
|
"Removing address handler %p(%p) for region %s on Device %p(%p)\n",
|
| 382 |
|
|
handler_obj, handler, acpi_ut_get_region_name (space_id),
|
| 383 |
|
|
node, obj_desc));
|
| 384 |
|
|
|
| 385 |
|
|
region_obj = handler_obj->address_space.region_list;
|
| 386 |
|
|
|
| 387 |
|
|
/* Walk the handler's region list */
|
| 388 |
|
|
|
| 389 |
|
|
while (region_obj) {
|
| 390 |
|
|
/*
|
| 391 |
|
|
* First disassociate the handler from the region.
|
| 392 |
|
|
*
|
| 393 |
|
|
* NOTE: this doesn't mean that the region goes away
|
| 394 |
|
|
* The region is just inaccessible as indicated to
|
| 395 |
|
|
* the _REG method
|
| 396 |
|
|
*/
|
| 397 |
|
|
acpi_ev_detach_region (region_obj, TRUE);
|
| 398 |
|
|
|
| 399 |
|
|
/*
|
| 400 |
|
|
* Walk the list: Just grab the head because the
|
| 401 |
|
|
* detach_region removed the previous head.
|
| 402 |
|
|
*/
|
| 403 |
|
|
region_obj = handler_obj->address_space.region_list;
|
| 404 |
|
|
|
| 405 |
|
|
}
|
| 406 |
|
|
|
| 407 |
|
|
/* Remove this Handler object from the list */
|
| 408 |
|
|
|
| 409 |
|
|
*last_obj_ptr = handler_obj->address_space.next;
|
| 410 |
|
|
|
| 411 |
|
|
/* Now we can delete the handler object */
|
| 412 |
|
|
|
| 413 |
|
|
acpi_ut_remove_reference (handler_obj);
|
| 414 |
|
|
goto unlock_and_exit;
|
| 415 |
|
|
}
|
| 416 |
|
|
|
| 417 |
|
|
/* Walk the linked list of handlers */
|
| 418 |
|
|
|
| 419 |
|
|
last_obj_ptr = &handler_obj->address_space.next;
|
| 420 |
|
|
handler_obj = handler_obj->address_space.next;
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
/* The handler does not exist */
|
| 424 |
|
|
|
| 425 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
| 426 |
|
|
"Unable to remove address handler %p for %s(%X), dev_node %p, obj %p\n",
|
| 427 |
|
|
handler, acpi_ut_get_region_name (space_id), space_id, node, obj_desc));
|
| 428 |
|
|
|
| 429 |
|
|
status = AE_NOT_EXIST;
|
| 430 |
|
|
|
| 431 |
|
|
unlock_and_exit:
|
| 432 |
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
| 433 |
|
|
return_ACPI_STATUS (status);
|
| 434 |
|
|
}
|
| 435 |
|
|
|
| 436 |
|
|
|
