1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
580 lines
17 KiB
C
580 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: evrgnini- ACPI address_space (op_region) init
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, 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/acevents.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evrgnini")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_system_memory_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling, a nop for now
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*
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******************************************************************************/
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acpi_status
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acpi_ev_system_memory_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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union acpi_operand_object *region_desc = (union acpi_operand_object *) handle;
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struct acpi_mem_space_context *local_region_context;
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ACPI_FUNCTION_TRACE ("ev_system_memory_region_setup");
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if (function == ACPI_REGION_DEACTIVATE) {
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if (*region_context) {
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ACPI_MEM_FREE (*region_context);
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*region_context = NULL;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/* Create a new context */
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local_region_context = ACPI_MEM_CALLOCATE (sizeof (struct acpi_mem_space_context));
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if (!(local_region_context)) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Save the region length and address for use in the handler */
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local_region_context->length = region_desc->region.length;
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local_region_context->address = region_desc->region.address;
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*region_context = local_region_context;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_io_space_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling
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*
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******************************************************************************/
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acpi_status
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acpi_ev_io_space_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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ACPI_FUNCTION_TRACE ("ev_io_space_region_setup");
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if (function == ACPI_REGION_DEACTIVATE) {
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*region_context = NULL;
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}
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else {
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*region_context = handler_context;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_pci_config_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling
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*
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* MUTEX: Assumes namespace is not locked
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*
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******************************************************************************/
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acpi_status
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acpi_ev_pci_config_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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acpi_status status = AE_OK;
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acpi_integer pci_value;
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struct acpi_pci_id *pci_id = *region_context;
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union acpi_operand_object *handler_obj;
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struct acpi_namespace_node *parent_node;
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struct acpi_namespace_node *pci_root_node;
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union acpi_operand_object *region_obj = (union acpi_operand_object *) handle;
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struct acpi_device_id object_hID;
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ACPI_FUNCTION_TRACE ("ev_pci_config_region_setup");
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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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* No installed handler. This shouldn't happen because the dispatch
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* routine checks before we get here, but we check again just in case.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Attempting to init a region %p, with no handler\n", region_obj));
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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*region_context = NULL;
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if (function == ACPI_REGION_DEACTIVATE) {
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if (pci_id) {
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ACPI_MEM_FREE (pci_id);
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}
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return_ACPI_STATUS (status);
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}
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parent_node = acpi_ns_get_parent_node (region_obj->region.node);
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/*
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* Get the _SEG and _BBN values from the device upon which the handler
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* is installed.
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*
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* We need to get the _SEG and _BBN objects relative to the PCI BUS device.
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* This is the device the handler has been registered to handle.
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*/
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/*
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* If the address_space.Node is still pointing to the root, we need
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* to scan upward for a PCI Root bridge and re-associate the op_region
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* handlers with that device.
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*/
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if (handler_obj->address_space.node == acpi_gbl_root_node) {
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/* Start search from the parent object */
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pci_root_node = parent_node;
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while (pci_root_node != acpi_gbl_root_node) {
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status = acpi_ut_execute_HID (pci_root_node, &object_hID);
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if (ACPI_SUCCESS (status)) {
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/* Got a valid _HID, check if this is a PCI root */
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if (!(ACPI_STRNCMP (object_hID.value, PCI_ROOT_HID_STRING,
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sizeof (PCI_ROOT_HID_STRING)))) {
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/* Install a handler for this PCI root bridge */
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status = acpi_install_address_space_handler ((acpi_handle) pci_root_node,
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ACPI_ADR_SPACE_PCI_CONFIG,
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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if (ACPI_FAILURE (status)) {
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if (status == AE_SAME_HANDLER) {
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/*
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* It is OK if the handler is already installed on the root
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* bridge. Still need to return a context object for the
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* new PCI_Config operation region, however.
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*/
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status = AE_OK;
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}
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else {
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ACPI_REPORT_ERROR ((
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"Could not install pci_config handler for Root Bridge %4.4s, %s\n",
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acpi_ut_get_node_name (pci_root_node), acpi_format_exception (status)));
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}
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}
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break;
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}
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}
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pci_root_node = acpi_ns_get_parent_node (pci_root_node);
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}
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/* PCI root bridge not found, use namespace root node */
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}
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else {
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pci_root_node = handler_obj->address_space.node;
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}
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/*
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* If this region is now initialized, we are done.
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* (install_address_space_handler could have initialized it)
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*/
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if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
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return_ACPI_STATUS (AE_OK);
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}
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/* Region is still not initialized. Create a new context */
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pci_id = ACPI_MEM_CALLOCATE (sizeof (struct acpi_pci_id));
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if (!pci_id) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* For PCI_Config space access, we need the segment, bus,
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* device and function numbers. Acquire them here.
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*/
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/*
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* Get the PCI device and function numbers from the _ADR object
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* contained in the parent's scope.
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*/
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status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR, parent_node, &pci_value);
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/*
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* The default is zero, and since the allocation above zeroed
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* the data, just do nothing on failure.
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*/
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if (ACPI_SUCCESS (status)) {
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pci_id->device = ACPI_HIWORD (ACPI_LODWORD (pci_value));
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pci_id->function = ACPI_LOWORD (ACPI_LODWORD (pci_value));
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}
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/* The PCI segment number comes from the _SEG method */
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status = acpi_ut_evaluate_numeric_object (METHOD_NAME__SEG, pci_root_node, &pci_value);
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if (ACPI_SUCCESS (status)) {
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pci_id->segment = ACPI_LOWORD (pci_value);
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}
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/* The PCI bus number comes from the _BBN method */
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status = acpi_ut_evaluate_numeric_object (METHOD_NAME__BBN, pci_root_node, &pci_value);
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if (ACPI_SUCCESS (status)) {
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pci_id->bus = ACPI_LOWORD (pci_value);
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}
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/* Complete this device's pci_id */
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acpi_os_derive_pci_id (pci_root_node, region_obj->region.node, &pci_id);
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*region_context = pci_id;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_pci_bar_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling
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*
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* MUTEX: Assumes namespace is not locked
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*
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******************************************************************************/
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acpi_status
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acpi_ev_pci_bar_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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ACPI_FUNCTION_TRACE ("ev_pci_bar_region_setup");
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_cmos_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling
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*
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* MUTEX: Assumes namespace is not locked
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*
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******************************************************************************/
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acpi_status
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acpi_ev_cmos_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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ACPI_FUNCTION_TRACE ("ev_cmos_region_setup");
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_default_region_setup
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*
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* PARAMETERS: Handle - Region we are interested in
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* Function - Start or stop
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* handler_context - Address space handler context
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* region_context - Region specific context
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*
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* RETURN: Status
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*
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* DESCRIPTION: Do any prep work for region handling
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*
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******************************************************************************/
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acpi_status
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acpi_ev_default_region_setup (
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acpi_handle handle,
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u32 function,
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void *handler_context,
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void **region_context)
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{
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ACPI_FUNCTION_TRACE ("ev_default_region_setup");
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if (function == ACPI_REGION_DEACTIVATE) {
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*region_context = NULL;
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}
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else {
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*region_context = handler_context;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_initialize_region
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*
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* PARAMETERS: region_obj - Region we are initializing
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* acpi_ns_locked - Is namespace locked?
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initializes the region, finds any _REG methods and saves them
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* for execution at a later time
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*
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* Get the appropriate address space handler for a newly
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* created region.
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*
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* This also performs address space specific initialization. For
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* example, PCI regions must have an _ADR object that contains
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* a PCI address in the scope of the definition. This address is
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* required to perform an access to PCI config space.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_initialize_region (
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union acpi_operand_object *region_obj,
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u8 acpi_ns_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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acpi_adr_space_type space_id;
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struct acpi_namespace_node *node;
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acpi_status status;
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struct acpi_namespace_node *method_node;
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acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
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union acpi_operand_object *region_obj2;
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ACPI_FUNCTION_TRACE_U32 ("ev_initialize_region", acpi_ns_locked);
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if (!region_obj) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
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return_ACPI_STATUS (AE_OK);
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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_ACPI_STATUS (AE_NOT_EXIST);
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}
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node = acpi_ns_get_parent_node (region_obj->region.node);
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space_id = region_obj->region.space_id;
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/* Setup defaults */
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region_obj->region.handler = NULL;
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region_obj2->extra.method_REG = NULL;
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region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
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region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
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/* Find any "_REG" method associated with this region definition */
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status = acpi_ns_search_node (*reg_name_ptr, node,
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ACPI_TYPE_METHOD, &method_node);
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if (ACPI_SUCCESS (status)) {
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/*
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* The _REG method is optional and there can be only one per region
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* definition. This will be executed when the handler is attached
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* or removed
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*/
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region_obj2->extra.method_REG = method_node;
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}
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/*
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* The following loop depends upon the root Node having no parent
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* ie: acpi_gbl_root_node->parent_entry being set to NULL
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*/
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while (node) {
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/* Check to see if a handler exists */
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handler_obj = NULL;
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obj_desc = acpi_ns_get_attached_object (node);
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if (obj_desc) {
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/* Can only be a handler if the object exists */
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switch (node->type) {
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case ACPI_TYPE_DEVICE:
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handler_obj = obj_desc->device.handler;
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break;
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case ACPI_TYPE_PROCESSOR:
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handler_obj = obj_desc->processor.handler;
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break;
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case ACPI_TYPE_THERMAL:
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handler_obj = obj_desc->thermal_zone.handler;
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break;
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default:
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/* Ignore other objects */
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break;
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}
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while (handler_obj) {
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/* Is this handler of the correct type? */
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if (handler_obj->address_space.space_id == space_id) {
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/* Found correct handler */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Found handler %p for region %p in obj %p\n",
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handler_obj, region_obj, obj_desc));
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status = acpi_ev_attach_region (handler_obj, region_obj,
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acpi_ns_locked);
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/*
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* Tell all users that this region is usable by running the _REG
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* method
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*/
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if (acpi_ns_locked) {
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status = acpi_ut_release_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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status = acpi_ev_execute_reg_method (region_obj, 1);
|
|
|
|
if (acpi_ns_locked) {
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* Try next handler in the list */
|
|
|
|
handler_obj = handler_obj->address_space.next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This node does not have the handler we need;
|
|
* Pop up one level
|
|
*/
|
|
node = acpi_ns_get_parent_node (node);
|
|
}
|
|
|
|
/* If we get here, there is no handler for this region */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"No handler for region_type %s(%X) (region_obj %p)\n",
|
|
acpi_ut_get_region_name (space_id), space_id, region_obj));
|
|
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|