--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: evrgnini- ACPI address_space (op_region) init
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, Intel Corp.
+ * 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 "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_EVENTS
+ACPI_MODULE_NAME("evrgnini")
+
+/* Local prototypes */
+static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
+
+/*******************************************************************************
+ *
+ * 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: Setup a system_memory operation region
+ *
+ ******************************************************************************/
+
+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) {
+ local_region_context =
+ (struct acpi_mem_space_context *)*region_context;
+
+ /* Delete a cached mapping if present */
+
+ if (local_region_context->mapped_length) {
+ acpi_os_unmap_memory(local_region_context->
+ mapped_logical_address,
+ local_region_context->
+ mapped_length);
+ }
+ ACPI_FREE(local_region_context);
+ *region_context = NULL;
+ }
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Create a new context */
+
+ local_region_context =
+ ACPI_ALLOCATE_ZEROED(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: Setup a IO operation region
+ *
+ ******************************************************************************/
+
+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: Setup a PCI_Config operation region
+ *
+ * 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;
+ u64 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;
+ struct acpi_namespace_node *pci_device_node;
+ union acpi_operand_object *region_obj =
+ (union acpi_operand_object *)handle;
+
+ 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_FREE(pci_id);
+ }
+ return_ACPI_STATUS(status);
+ }
+
+ parent_node = region_obj->region.node->parent;
+
+ /*
+ * 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) {
+
+ /* Get the _HID/_CID in order to detect a root_bridge */
+
+ if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
+
+ /* 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_EXCEPTION((AE_INFO, status,
+ "Could not install PciConfig handler "
+ "for Root Bridge %4.4s",
+ acpi_ut_get_node_name
+ (pci_root_node)));
+ }
+ }
+ break;
+ }
+
+ pci_root_node = pci_root_node->parent;
+ }
+
+ /* 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_ALLOCATE_ZEROED(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.
+ *
+ * Find the parent device object. (This allows the operation region to be
+ * within a subscope under the device, such as a control method.)
+ */
+ pci_device_node = region_obj->region.node;
+ while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
+ pci_device_node = pci_device_node->parent;
+ }
+
+ if (!pci_device_node) {
+ ACPI_FREE(pci_id);
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+
+ /*
+ * 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,
+ pci_device_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/update the PCI ID for this device */
+
+ status =
+ acpi_hw_derive_pci_id(pci_id, pci_root_node,
+ region_obj->region.node);
+ if (ACPI_FAILURE(status)) {
+ ACPI_FREE(pci_id);
+ return_ACPI_STATUS(status);
+ }
+
+ *region_context = pci_id;
+ return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_is_pci_root_bridge
+ *
+ * PARAMETERS: node - Device node being examined
+ *
+ * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
+ *
+ * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
+ * examining the _HID and _CID for the device.
+ *
+ ******************************************************************************/
+
+static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
+{
+ acpi_status status;
+ struct acpi_pnp_device_id *hid;
+ struct acpi_pnp_device_id_list *cid;
+ u32 i;
+ u8 match;
+
+ /* Get the _HID and check for a PCI Root Bridge */
+
+ status = acpi_ut_execute_HID(node, &hid);
+ if (ACPI_FAILURE(status)) {
+ return (FALSE);
+ }
+
+ match = acpi_ut_is_pci_root_bridge(hid->string);
+ ACPI_FREE(hid);
+
+ if (match) {
+ return (TRUE);
+ }
+
+ /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
+
+ status = acpi_ut_execute_CID(node, &cid);
+ if (ACPI_FAILURE(status)) {
+ return (FALSE);
+ }
+
+ /* Check all _CIDs in the returned list */
+
+ for (i = 0; i < cid->count; i++) {
+ if (acpi_ut_is_pci_root_bridge(cid->ids[i].string)) {
+ ACPI_FREE(cid);
+ return (TRUE);
+ }
+ }
+
+ ACPI_FREE(cid);
+ return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * 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: Setup a pci_BAR operation region
+ *
+ * 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: Setup a CMOS operation region
+ *
+ * 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: Default region initialization
+ *
+ ******************************************************************************/
+
+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.
+ *
+ * MUTEX: Interpreter should be unlocked, because we may run the _REG
+ * method for this region.
+ *
+ ******************************************************************************/
+
+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 = region_obj->region.node->parent;
+ 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_one_scope(*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;
+
+ case ACPI_TYPE_METHOD:
+ /*
+ * If we are executing module level code, the original
+ * Node's object was replaced by this Method object and we
+ * saved the handler in the method object.
+ *
+ * See acpi_ns_exec_module_code
+ */
+ if (obj_desc->method.
+ info_flags & ACPI_METHOD_MODULE_LEVEL) {
+ handler_obj =
+ obj_desc->method.dispatch.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, ACPI_REG_CONNECT);
+
+ 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 = node->parent;
+ }
+
+ /* If we get here, there is no handler for this region */
+
+ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+ "No handler for RegionType %s(%X) (RegionObj %p)\n",
+ acpi_ut_get_region_name(space_id), space_id,
+ region_obj));
+
+ return_ACPI_STATUS(AE_NOT_EXIST);
+}
Code Review / kvmfornfv.git / blobdiff