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Diffstat (limited to 'drivers/acpi/events/evrgnini.c')
| -rw-r--r-- | drivers/acpi/events/evrgnini.c | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/drivers/acpi/events/evrgnini.c b/drivers/acpi/events/evrgnini.c new file mode 100644 index 000000000000..4983a3378be5 --- /dev/null +++ b/drivers/acpi/events/evrgnini.c @@ -0,0 +1,580 @@ +/****************************************************************************** + * + * 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); +} + |