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-rw-r--r--drivers/acpi/events/evrgnini.c580
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diff --git a/drivers/acpi/events/evrgnini.c b/drivers/acpi/events/evrgnini.c
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index 000000000000..4983a3378be5
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+++ b/drivers/acpi/events/evrgnini.c
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+/******************************************************************************
+ *
+ * Module Name: evrgnini- ACPI address_space (op_region) init
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acevents.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT ACPI_EVENTS
+ ACPI_MODULE_NAME ("evrgnini")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_system_memory_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling, a nop for now
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_system_memory_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ union acpi_operand_object *region_desc = (union acpi_operand_object *) handle;
+ struct acpi_mem_space_context *local_region_context;
+
+
+ ACPI_FUNCTION_TRACE ("ev_system_memory_region_setup");
+
+
+ if (function == ACPI_REGION_DEACTIVATE) {
+ if (*region_context) {
+ ACPI_MEM_FREE (*region_context);
+ *region_context = NULL;
+ }
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /* Create a new context */
+
+ local_region_context = ACPI_MEM_CALLOCATE (sizeof (struct acpi_mem_space_context));
+ if (!(local_region_context)) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /* Save the region length and address for use in the handler */
+
+ local_region_context->length = region_desc->region.length;
+ local_region_context->address = region_desc->region.address;
+
+ *region_context = local_region_context;
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_io_space_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_io_space_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ ACPI_FUNCTION_TRACE ("ev_io_space_region_setup");
+
+
+ if (function == ACPI_REGION_DEACTIVATE) {
+ *region_context = NULL;
+ }
+ else {
+ *region_context = handler_context;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_pci_config_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX: Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_config_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ acpi_status status = AE_OK;
+ acpi_integer pci_value;
+ struct acpi_pci_id *pci_id = *region_context;
+ union acpi_operand_object *handler_obj;
+ struct acpi_namespace_node *parent_node;
+ struct acpi_namespace_node *pci_root_node;
+ union acpi_operand_object *region_obj = (union acpi_operand_object *) handle;
+ struct acpi_device_id object_hID;
+
+
+ ACPI_FUNCTION_TRACE ("ev_pci_config_region_setup");
+
+
+ handler_obj = region_obj->region.handler;
+ if (!handler_obj) {
+ /*
+ * No installed handler. This shouldn't happen because the dispatch
+ * routine checks before we get here, but we check again just in case.
+ */
+ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+ "Attempting to init a region %p, with no handler\n", region_obj));
+ return_ACPI_STATUS (AE_NOT_EXIST);
+ }
+
+ *region_context = NULL;
+ if (function == ACPI_REGION_DEACTIVATE) {
+ if (pci_id) {
+ ACPI_MEM_FREE (pci_id);
+ }
+ return_ACPI_STATUS (status);
+ }
+
+ parent_node = acpi_ns_get_parent_node (region_obj->region.node);
+
+ /*
+ * Get the _SEG and _BBN values from the device upon which the handler
+ * is installed.
+ *
+ * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
+ * This is the device the handler has been registered to handle.
+ */
+
+ /*
+ * If the address_space.Node is still pointing to the root, we need
+ * to scan upward for a PCI Root bridge and re-associate the op_region
+ * handlers with that device.
+ */
+ if (handler_obj->address_space.node == acpi_gbl_root_node) {
+ /* Start search from the parent object */
+
+ pci_root_node = parent_node;
+ while (pci_root_node != acpi_gbl_root_node) {
+ status = acpi_ut_execute_HID (pci_root_node, &object_hID);
+ if (ACPI_SUCCESS (status)) {
+ /* Got a valid _HID, check if this is a PCI root */
+
+ if (!(ACPI_STRNCMP (object_hID.value, PCI_ROOT_HID_STRING,
+ sizeof (PCI_ROOT_HID_STRING)))) {
+ /* Install a handler for this PCI root bridge */
+
+ status = acpi_install_address_space_handler ((acpi_handle) pci_root_node,
+ ACPI_ADR_SPACE_PCI_CONFIG,
+ ACPI_DEFAULT_HANDLER, NULL, NULL);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_SAME_HANDLER) {
+ /*
+ * It is OK if the handler is already installed on the root
+ * bridge. Still need to return a context object for the
+ * new PCI_Config operation region, however.
+ */
+ status = AE_OK;
+ }
+ else {
+ ACPI_REPORT_ERROR ((
+ "Could not install pci_config handler for Root Bridge %4.4s, %s\n",
+ acpi_ut_get_node_name (pci_root_node), acpi_format_exception (status)));
+ }
+ }
+ break;
+ }
+ }
+
+ pci_root_node = acpi_ns_get_parent_node (pci_root_node);
+ }
+
+ /* PCI root bridge not found, use namespace root node */
+ }
+ else {
+ pci_root_node = handler_obj->address_space.node;
+ }
+
+ /*
+ * If this region is now initialized, we are done.
+ * (install_address_space_handler could have initialized it)
+ */
+ if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /* Region is still not initialized. Create a new context */
+
+ pci_id = ACPI_MEM_CALLOCATE (sizeof (struct acpi_pci_id));
+ if (!pci_id) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ /*
+ * For PCI_Config space access, we need the segment, bus,
+ * device and function numbers. Acquire them here.
+ */
+
+ /*
+ * Get the PCI device and function numbers from the _ADR object
+ * contained in the parent's scope.
+ */
+ status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR, parent_node, &pci_value);
+
+ /*
+ * The default is zero, and since the allocation above zeroed
+ * the data, just do nothing on failure.
+ */
+ if (ACPI_SUCCESS (status)) {
+ pci_id->device = ACPI_HIWORD (ACPI_LODWORD (pci_value));
+ pci_id->function = ACPI_LOWORD (ACPI_LODWORD (pci_value));
+ }
+
+ /* The PCI segment number comes from the _SEG method */
+
+ status = acpi_ut_evaluate_numeric_object (METHOD_NAME__SEG, pci_root_node, &pci_value);
+ if (ACPI_SUCCESS (status)) {
+ pci_id->segment = ACPI_LOWORD (pci_value);
+ }
+
+ /* The PCI bus number comes from the _BBN method */
+
+ status = acpi_ut_evaluate_numeric_object (METHOD_NAME__BBN, pci_root_node, &pci_value);
+ if (ACPI_SUCCESS (status)) {
+ pci_id->bus = ACPI_LOWORD (pci_value);
+ }
+
+ /* Complete this device's pci_id */
+
+ acpi_os_derive_pci_id (pci_root_node, region_obj->region.node, &pci_id);
+
+ *region_context = pci_id;
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_pci_bar_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX: Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_bar_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ ACPI_FUNCTION_TRACE ("ev_pci_bar_region_setup");
+
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_cmos_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX: Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_cmos_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ ACPI_FUNCTION_TRACE ("ev_cmos_region_setup");
+
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_default_region_setup
+ *
+ * PARAMETERS: Handle - Region we are interested in
+ * Function - Start or stop
+ * handler_context - Address space handler context
+ * region_context - Region specific context
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_default_region_setup (
+ acpi_handle handle,
+ u32 function,
+ void *handler_context,
+ void **region_context)
+{
+ ACPI_FUNCTION_TRACE ("ev_default_region_setup");
+
+
+ if (function == ACPI_REGION_DEACTIVATE) {
+ *region_context = NULL;
+ }
+ else {
+ *region_context = handler_context;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_initialize_region
+ *
+ * PARAMETERS: region_obj - Region we are initializing
+ * acpi_ns_locked - Is namespace locked?
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
+ * for execution at a later time
+ *
+ * Get the appropriate address space handler for a newly
+ * created region.
+ *
+ * This also performs address space specific initialization. For
+ * example, PCI regions must have an _ADR object that contains
+ * a PCI address in the scope of the definition. This address is
+ * required to perform an access to PCI config space.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_initialize_region (
+ union acpi_operand_object *region_obj,
+ u8 acpi_ns_locked)
+{
+ union acpi_operand_object *handler_obj;
+ union acpi_operand_object *obj_desc;
+ acpi_adr_space_type space_id;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+ struct acpi_namespace_node *method_node;
+ acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
+ union acpi_operand_object *region_obj2;
+
+
+ ACPI_FUNCTION_TRACE_U32 ("ev_initialize_region", acpi_ns_locked);
+
+
+ if (!region_obj) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ region_obj2 = acpi_ns_get_secondary_object (region_obj);
+ if (!region_obj2) {
+ return_ACPI_STATUS (AE_NOT_EXIST);
+ }
+
+ node = acpi_ns_get_parent_node (region_obj->region.node);
+ space_id = region_obj->region.space_id;
+
+ /* Setup defaults */
+
+ region_obj->region.handler = NULL;
+ region_obj2->extra.method_REG = NULL;
+ region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
+ region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
+
+ /* Find any "_REG" method associated with this region definition */
+
+ status = acpi_ns_search_node (*reg_name_ptr, node,
+ ACPI_TYPE_METHOD, &method_node);
+ if (ACPI_SUCCESS (status)) {
+ /*
+ * The _REG method is optional and there can be only one per region
+ * definition. This will be executed when the handler is attached
+ * or removed
+ */
+ region_obj2->extra.method_REG = method_node;
+ }
+
+ /*
+ * The following loop depends upon the root Node having no parent
+ * ie: acpi_gbl_root_node->parent_entry being set to NULL
+ */
+ while (node) {
+ /* Check to see if a handler exists */
+
+ handler_obj = NULL;
+ obj_desc = acpi_ns_get_attached_object (node);
+ if (obj_desc) {
+ /* Can only be a handler if the object exists */
+
+ switch (node->type) {
+ case ACPI_TYPE_DEVICE:
+
+ handler_obj = obj_desc->device.handler;
+ break;
+
+ case ACPI_TYPE_PROCESSOR:
+
+ handler_obj = obj_desc->processor.handler;
+ break;
+
+ case ACPI_TYPE_THERMAL:
+
+ handler_obj = obj_desc->thermal_zone.handler;
+ break;
+
+ default:
+ /* Ignore other objects */
+ break;
+ }
+
+ while (handler_obj) {
+ /* Is this handler of the correct type? */
+
+ if (handler_obj->address_space.space_id == space_id) {
+ /* Found correct handler */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+ "Found handler %p for region %p in obj %p\n",
+ handler_obj, region_obj, obj_desc));
+
+ status = acpi_ev_attach_region (handler_obj, region_obj,
+ acpi_ns_locked);
+
+ /*
+ * Tell all users that this region is usable by running the _REG
+ * method
+ */
+ if (acpi_ns_locked) {
+ status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ 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);
+}
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.