diff options
Diffstat (limited to 'drivers/acpi/events/evregion.c')
| -rw-r--r-- | drivers/acpi/events/evregion.c | 1074 |
1 files changed, 0 insertions, 1074 deletions
diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c deleted file mode 100644 index 236fbd1..0000000 --- a/drivers/acpi/events/evregion.c +++ /dev/null @@ -1,1074 +0,0 @@ -/****************************************************************************** - * - * Module Name: evregion - ACPI address_space (op_region) handler dispatch - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/acevents.h> -#include <acpi/acnamesp.h> -#include <acpi/acinterp.h> - -#define _COMPONENT ACPI_EVENTS -ACPI_MODULE_NAME("evregion") -#define ACPI_NUM_DEFAULT_SPACES 4 -static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = { - ACPI_ADR_SPACE_SYSTEM_MEMORY, - ACPI_ADR_SPACE_SYSTEM_IO, - ACPI_ADR_SPACE_PCI_CONFIG, - ACPI_ADR_SPACE_DATA_TABLE -}; - -/* Local prototypes */ - -static acpi_status -acpi_ev_reg_run(acpi_handle obj_handle, - u32 level, void *context, void **return_value); - -static acpi_status -acpi_ev_install_handler(acpi_handle obj_handle, - u32 level, void *context, void **return_value); - -/******************************************************************************* - * - * FUNCTION: acpi_ev_install_region_handlers - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Installs the core subsystem default address space handlers. - * - ******************************************************************************/ - -acpi_status acpi_ev_install_region_handlers(void) -{ - acpi_status status; - u32 i; - - ACPI_FUNCTION_TRACE(ev_install_region_handlers); - - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* - * All address spaces (PCI Config, EC, SMBus) are scope dependent - * and registration must occur for a specific device. - * - * In the case of the system memory and IO address spaces there is currently - * no device associated with the address space. For these we use the root. - * - * We install the default PCI config space handler at the root so - * that this space is immediately available even though the we have - * not enumerated all the PCI Root Buses yet. This is to conform - * to the ACPI specification which states that the PCI config - * space must be always available -- even though we are nowhere - * near ready to find the PCI root buses at this point. - * - * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler - * has already been installed (via acpi_install_address_space_handler). - * Similar for AE_SAME_HANDLER. - */ - for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { - status = acpi_ev_install_space_handler(acpi_gbl_root_node, - acpi_gbl_default_address_spaces - [i], - ACPI_DEFAULT_HANDLER, - NULL, NULL); - switch (status) { - case AE_OK: - case AE_SAME_HANDLER: - case AE_ALREADY_EXISTS: - - /* These exceptions are all OK */ - - status = AE_OK; - break; - - default: - - goto unlock_and_exit; - } - } - - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_initialize_op_regions - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Execute _REG methods for all Operation Regions that have - * an installed default region handler. - * - ******************************************************************************/ - -acpi_status acpi_ev_initialize_op_regions(void) -{ - acpi_status status; - u32 i; - - ACPI_FUNCTION_TRACE(ev_initialize_op_regions); - - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* - * Run the _REG methods for op_regions in each default address space - */ - for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { - - /* TBD: Make sure handler is the DEFAULT handler, otherwise - * _REG will have already been run. - */ - status = acpi_ev_execute_reg_methods(acpi_gbl_root_node, - acpi_gbl_default_address_spaces - [i]); - } - - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_execute_reg_method - * - * PARAMETERS: region_obj - Region object - * Function - Passed to _REG: On (1) or Off (0) - * - * RETURN: Status - * - * DESCRIPTION: Execute _REG method for a region - * - ******************************************************************************/ - -acpi_status -acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) -{ - struct acpi_evaluate_info *info; - union acpi_operand_object *args[3]; - union acpi_operand_object *region_obj2; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_execute_reg_method); - - region_obj2 = acpi_ns_get_secondary_object(region_obj); - if (!region_obj2) { - return_ACPI_STATUS(AE_NOT_EXIST); - } - - if (region_obj2->extra.method_REG == NULL) { - return_ACPI_STATUS(AE_OK); - } - - /* Allocate and initialize the evaluation information block */ - - info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); - if (!info) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - info->prefix_node = region_obj2->extra.method_REG; - info->pathname = NULL; - info->parameters = args; - info->flags = ACPI_IGNORE_RETURN_VALUE; - - /* - * The _REG method has two arguments: - * - * Arg0 - Integer: - * Operation region space ID Same value as region_obj->Region.space_id - * - * Arg1 - Integer: - * connection status 1 for connecting the handler, 0 for disconnecting - * the handler (Passed as a parameter) - */ - args[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); - if (!args[0]) { - status = AE_NO_MEMORY; - goto cleanup1; - } - - args[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); - if (!args[1]) { - status = AE_NO_MEMORY; - goto cleanup2; - } - - /* Setup the parameter objects */ - - args[0]->integer.value = region_obj->region.space_id; - args[1]->integer.value = function; - args[2] = NULL; - - /* Execute the method, no return value */ - - ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname - (ACPI_TYPE_METHOD, info->prefix_node, NULL)); - - status = acpi_ns_evaluate(info); - acpi_ut_remove_reference(args[1]); - - cleanup2: - acpi_ut_remove_reference(args[0]); - - cleanup1: - ACPI_FREE(info); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_address_space_dispatch - * - * PARAMETERS: region_obj - Internal region object - * Function - Read or Write operation - * Address - Where in the space to read or write - * bit_width - Field width in bits (8, 16, 32, or 64) - * Value - Pointer to in or out value, must be - * full 64-bit acpi_integer - * - * RETURN: Status - * - * DESCRIPTION: Dispatch an address space or operation region access to - * a previously installed handler. - * - ******************************************************************************/ - -acpi_status -acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, - u32 function, - acpi_physical_address address, - u32 bit_width, acpi_integer * value) -{ - acpi_status status; - acpi_adr_space_handler handler; - acpi_adr_space_setup region_setup; - union acpi_operand_object *handler_desc; - union acpi_operand_object *region_obj2; - void *region_context = NULL; - - ACPI_FUNCTION_TRACE(ev_address_space_dispatch); - - region_obj2 = acpi_ns_get_secondary_object(region_obj); - if (!region_obj2) { - return_ACPI_STATUS(AE_NOT_EXIST); - } - - /* Ensure that there is a handler associated with this region */ - - handler_desc = region_obj->region.handler; - if (!handler_desc) { - ACPI_ERROR((AE_INFO, - "No handler for Region [%4.4s] (%p) [%s]", - acpi_ut_get_node_name(region_obj->region.node), - region_obj, - acpi_ut_get_region_name(region_obj->region. - space_id))); - - return_ACPI_STATUS(AE_NOT_EXIST); - } - - /* - * It may be the case that the region has never been initialized - * Some types of regions require special init code - */ - if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { - /* - * This region has not been initialized yet, do it - */ - region_setup = handler_desc->address_space.setup; - if (!region_setup) { - - /* No initialization routine, exit with error */ - - ACPI_ERROR((AE_INFO, - "No init routine for region(%p) [%s]", - region_obj, - acpi_ut_get_region_name(region_obj->region. - space_id))); - return_ACPI_STATUS(AE_NOT_EXIST); - } - - /* - * We must exit the interpreter because the region - * setup will potentially execute control methods - * (e.g., _REG method for this region) - */ - acpi_ex_exit_interpreter(); - - status = region_setup(region_obj, ACPI_REGION_ACTIVATE, - handler_desc->address_space.context, - ®ion_context); - - /* Re-enter the interpreter */ - - acpi_ex_enter_interpreter(); - - /* Check for failure of the Region Setup */ - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "During region initialization: [%s]", - acpi_ut_get_region_name(region_obj-> - region. - space_id))); - return_ACPI_STATUS(status); - } - - /* - * Region initialization may have been completed by region_setup - */ - if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { - region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; - - if (region_obj2->extra.region_context) { - - /* The handler for this region was already installed */ - - ACPI_FREE(region_context); - } else { - /* - * Save the returned context for use in all accesses to - * this particular region - */ - region_obj2->extra.region_context = - region_context; - } - } - } - - /* We have everything we need, we can invoke the address space handler */ - - handler = handler_desc->address_space.handler; - - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", - ®ion_obj->region.handler->address_space, handler, - ACPI_FORMAT_NATIVE_UINT(address), - acpi_ut_get_region_name(region_obj->region. - space_id))); - - if (!(handler_desc->address_space.handler_flags & - ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { - /* - * For handlers other than the default (supplied) handlers, we must - * exit the interpreter because the handler *might* block -- we don't - * know what it will do, so we can't hold the lock on the intepreter. - */ - acpi_ex_exit_interpreter(); - } - - /* Call the handler */ - - status = handler(function, address, bit_width, value, - handler_desc->address_space.context, - region_obj2->extra.region_context); - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", - acpi_ut_get_region_name(region_obj->region. - space_id))); - } - - if (!(handler_desc->address_space.handler_flags & - ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { - /* - * We just returned from a non-default handler, we must re-enter the - * interpreter - */ - acpi_ex_enter_interpreter(); - } - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_detach_region - * - * PARAMETERS: region_obj - Region Object - * acpi_ns_is_locked - Namespace Region Already Locked? - * - * RETURN: None - * - * DESCRIPTION: Break the association between the handler and the region - * this is a two way association. - * - ******************************************************************************/ - -void -acpi_ev_detach_region(union acpi_operand_object *region_obj, - u8 acpi_ns_is_locked) -{ - union acpi_operand_object *handler_obj; - union acpi_operand_object *obj_desc; - union acpi_operand_object **last_obj_ptr; - acpi_adr_space_setup region_setup; - void **region_context; - union acpi_operand_object *region_obj2; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_detach_region); - - region_obj2 = acpi_ns_get_secondary_object(region_obj); - if (!region_obj2) { - return_VOID; - } - region_context = ®ion_obj2->extra.region_context; - - /* Get the address handler from the region object */ - - handler_obj = region_obj->region.handler; - if (!handler_obj) { - - /* This region has no handler, all done */ - - return_VOID; - } - - /* Find this region in the handler's list */ - - obj_desc = handler_obj->address_space.region_list; - last_obj_ptr = &handler_obj->address_space.region_list; - - while (obj_desc) { - - /* Is this the correct Region? */ - - if (obj_desc == region_obj) { - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Removing Region %p from address handler %p\n", - region_obj, handler_obj)); - - /* This is it, remove it from the handler's list */ - - *last_obj_ptr = obj_desc->region.next; - obj_desc->region.next = NULL; /* Must clear field */ - - if (acpi_ns_is_locked) { - status = - acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_VOID; - } - } - - /* Now stop region accesses by executing the _REG method */ - - status = acpi_ev_execute_reg_method(region_obj, 0); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "from region _REG, [%s]", - acpi_ut_get_region_name - (region_obj->region.space_id))); - } - - if (acpi_ns_is_locked) { - status = - acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_VOID; - } - } - - /* - * If the region has been activated, call the setup handler - * with the deactivate notification - */ - if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { - region_setup = handler_obj->address_space.setup; - status = - region_setup(region_obj, - ACPI_REGION_DEACTIVATE, - handler_obj->address_space. - context, region_context); - - /* Init routine may fail, Just ignore errors */ - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "from region handler - deactivate, [%s]", - acpi_ut_get_region_name - (region_obj->region. - space_id))); - } - - region_obj->region.flags &= - ~(AOPOBJ_SETUP_COMPLETE); - } - - /* - * Remove handler reference in the region - * - * NOTE: this doesn't mean that the region goes away, the region - * is just inaccessible as indicated to the _REG method - * - * If the region is on the handler's list, this must be the - * region's handler - */ - region_obj->region.handler = NULL; - acpi_ut_remove_reference(handler_obj); - - return_VOID; - } - - /* Walk the linked list of handlers */ - - last_obj_ptr = &obj_desc->region.next; - obj_desc = obj_desc->region.next; - } - - /* If we get here, the region was not in the handler's region list */ - - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Cannot remove region %p from address handler %p\n", - region_obj, handler_obj)); - - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_attach_region - * - * PARAMETERS: handler_obj - Handler Object - * region_obj - Region Object - * acpi_ns_is_locked - Namespace Region Already Locked? - * - * RETURN: None - * - * DESCRIPTION: Create the association between the handler and the region - * this is a two way association. - * - ******************************************************************************/ - -acpi_status -acpi_ev_attach_region(union acpi_operand_object *handler_obj, - union acpi_operand_object *region_obj, - u8 acpi_ns_is_locked) -{ - - ACPI_FUNCTION_TRACE(ev_attach_region); - - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Adding Region [%4.4s] %p to address handler %p [%s]\n", - acpi_ut_get_node_name(region_obj->region.node), - region_obj, handler_obj, - acpi_ut_get_region_name(region_obj->region. - space_id))); - - /* Link this region to the front of the handler's list */ - - region_obj->region.next = handler_obj->address_space.region_list; - handler_obj->address_space.region_list = region_obj; - - /* Install the region's handler */ - - if (region_obj->region.handler) { - return_ACPI_STATUS(AE_ALREADY_EXISTS); - } - - region_obj->region.handler = handler_obj; - acpi_ut_add_reference(handler_obj); - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_install_handler - * - * PARAMETERS: walk_namespace callback - * - * DESCRIPTION: This routine installs an address handler into objects that are - * of type Region or Device. - * - * If the Object is a Device, and the device has a handler of - * the same type then the search is terminated in that branch. - * - * This is because the existing handler is closer in proximity - * to any more regions than the one we are trying to install. - * - ******************************************************************************/ - -static acpi_status -acpi_ev_install_handler(acpi_handle obj_handle, - u32 level, void *context, void **return_value) -{ - union acpi_operand_object *handler_obj; - union acpi_operand_object *next_handler_obj; - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *node; - acpi_status status; - - ACPI_FUNCTION_NAME(ev_install_handler); - - handler_obj = (union acpi_operand_object *)context; - - /* Parameter validation */ - - if (!handler_obj) { - return (AE_OK); - } - - /* Convert and validate the device handle */ - - node = acpi_ns_map_handle_to_node(obj_handle); - if (!node) { - return (AE_BAD_PARAMETER); - } - - /* - * We only care about regions.and objects - * that are allowed to have address space handlers - */ - if ((node->type != ACPI_TYPE_DEVICE) && - (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { - return (AE_OK); - } - - /* Check for an existing internal object */ - - obj_desc = acpi_ns_get_attached_object(node); - if (!obj_desc) { - - /* No object, just exit */ - - return (AE_OK); - } - - /* Devices are handled different than regions */ - - if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) { - - /* Check if this Device already has a handler for this address space */ - - next_handler_obj = obj_desc->device.handler; - while (next_handler_obj) { - - /* Found a handler, is it for the same address space? */ - - if (next_handler_obj->address_space.space_id == - handler_obj->address_space.space_id) { - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Found handler for region [%s] in device %p(%p) handler %p\n", - acpi_ut_get_region_name - (handler_obj->address_space. - space_id), obj_desc, - next_handler_obj, - handler_obj)); - - /* - * Since the object we found it on was a device, then it - * means that someone has already installed a handler for - * the branch of the namespace from this device on. Just - * bail out telling the walk routine to not traverse this - * branch. This preserves the scoping rule for handlers. - */ - return (AE_CTRL_DEPTH); - } - - /* Walk the linked list of handlers attached to this device */ - - next_handler_obj = next_handler_obj->address_space.next; - } - - /* - * As long as the device didn't have a handler for this - * space we don't care about it. We just ignore it and - * proceed. - */ - return (AE_OK); - } - - /* Object is a Region */ - - if (obj_desc->region.space_id != handler_obj->address_space.space_id) { - /* - * This region is for a different address space - * -- just ignore it - */ - return (AE_OK); - } - - /* - * Now we have a region and it is for the handler's address - * space type. - * - * First disconnect region for any previous handler (if any) - */ - acpi_ev_detach_region(obj_desc, FALSE); - - /* Connect the region to the new handler */ - - status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE); - return (status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_install_space_handler - * - * PARAMETERS: Node - Namespace node for the device - * space_id - The address space ID - * Handler - Address of the handler - * Setup - Address of the setup function - * Context - Value passed to the handler on each access - * - * RETURN: Status - * - * DESCRIPTION: Install a handler for all op_regions of a given space_id. - * Assumes namespace is locked - * - ******************************************************************************/ - -acpi_status -acpi_ev_install_space_handler(struct acpi_namespace_node * node, - acpi_adr_space_type space_id, - acpi_adr_space_handler handler, - acpi_adr_space_setup setup, void *context) -{ - union acpi_operand_object *obj_desc; - union acpi_operand_object *handler_obj; - acpi_status status; - acpi_object_type type; - u8 flags = 0; - - ACPI_FUNCTION_TRACE(ev_install_space_handler); - - /* - * This registration is valid for only the types below - * and the root. This is where the default handlers - * get placed. - */ - if ((node->type != ACPI_TYPE_DEVICE) && - (node->type != ACPI_TYPE_PROCESSOR) && - (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - if (handler == ACPI_DEFAULT_HANDLER) { - flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; - - switch (space_id) { - case ACPI_ADR_SPACE_SYSTEM_MEMORY: - handler = acpi_ex_system_memory_space_handler; - setup = acpi_ev_system_memory_region_setup; - break; - - case ACPI_ADR_SPACE_SYSTEM_IO: - handler = acpi_ex_system_io_space_handler; - setup = acpi_ev_io_space_region_setup; - break; - - case ACPI_ADR_SPACE_PCI_CONFIG: - handler = acpi_ex_pci_config_space_handler; - setup = acpi_ev_pci_config_region_setup; - break; - - case ACPI_ADR_SPACE_CMOS: - handler = acpi_ex_cmos_space_handler; - setup = acpi_ev_cmos_region_setup; - break; - - case ACPI_ADR_SPACE_PCI_BAR_TARGET: - handler = acpi_ex_pci_bar_space_handler; - setup = acpi_ev_pci_bar_region_setup; - break; - - case ACPI_ADR_SPACE_DATA_TABLE: - handler = acpi_ex_data_table_space_handler; - setup = NULL; - break; - - default: - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - } - - /* If the caller hasn't specified a setup routine, use the default */ - - if (!setup) { - setup = acpi_ev_default_region_setup; - } - - /* Check for an existing internal object */ - - obj_desc = acpi_ns_get_attached_object(node); - if (obj_desc) { - /* - * The attached device object already exists. - * Make sure the handler is not already installed. - */ - handler_obj = obj_desc->device.handler; - - /* Walk the handler list for this device */ - - while (handler_obj) { - - /* Same space_id indicates a handler already installed */ - - if (handler_obj->address_space.space_id == space_id) { - if (handler_obj->address_space.handler == - handler) { - /* - * It is (relatively) OK to attempt to install the SAME - * handler twice. This can easily happen - * with PCI_Config space. - */ - status = AE_SAME_HANDLER; - goto unlock_and_exit; - } else { - /* A handler is already installed */ - - status = AE_ALREADY_EXISTS; - } - goto unlock_and_exit; - } - - /* Walk the linked list of handlers */ - - handler_obj = handler_obj->address_space.next; - } - } else { - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Creating object on Device %p while installing handler\n", - node)); - - /* obj_desc does not exist, create one */ - - if (node->type == ACPI_TYPE_ANY) { - type = ACPI_TYPE_DEVICE; - } else { - type = node->type; - } - - obj_desc = acpi_ut_create_internal_object(type); - if (!obj_desc) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - /* Init new descriptor */ - - obj_desc->common.type = (u8) type; - - /* Attach the new object to the Node */ - - status = acpi_ns_attach_object(node, obj_desc, type); - - /* Remove local reference to the object */ - - acpi_ut_remove_reference(obj_desc); - - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - } - - ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, - "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", - acpi_ut_get_region_name(space_id), space_id, - acpi_ut_get_node_name(node), node, obj_desc)); - - /* - * Install the handler - * - * At this point there is no existing handler. - * Just allocate the object for the handler and link it - * into the list. - */ - handler_obj = - acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER); - if (!handler_obj) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - /* Init handler obj */ - - handler_obj->address_space.space_id = (u8) space_id; - handler_obj->address_space.handler_flags = flags; - handler_obj->address_space.region_list = NULL; - handler_obj->address_space.node = node; - handler_obj->address_space.handler = handler; - handler_obj->address_space.context = context; - handler_obj->address_space.setup = setup; - - /* Install at head of Device.address_space list */ - - handler_obj->address_space.next = obj_desc->device.handler; - - /* - * The Device object is the first reference on the handler_obj. - * Each region that uses the handler adds a reference. - */ - obj_desc->device.handler = handler_obj; - - /* - * Walk the namespace finding all of the regions this - * handler will manage. - * - * Start at the device and search the branch toward - * the leaf nodes until either the leaf is encountered or - * a device is detected that has an address handler of the - * same type. - * - * In either case, back up and search down the remainder - * of the branch - */ - status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, - ACPI_NS_WALK_UNLOCK, - acpi_ev_install_handler, handler_obj, - NULL); - - unlock_and_exit: - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_execute_reg_methods - * - * PARAMETERS: Node - Namespace node for the device - * space_id - The address space ID - * - * RETURN: Status - * - * DESCRIPTION: Run all _REG methods for the input Space ID; - * Note: assumes namespace is locked, or system init time. - * - ******************************************************************************/ - -acpi_status -acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, - acpi_adr_space_type space_id) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_execute_reg_methods); - - /* - * Run all _REG methods for all Operation Regions for this - * space ID. This is a separate walk in order to handle any - * interdependencies between regions and _REG methods. (i.e. handlers - * must be installed for all regions of this Space ID before we - * can run any _REG methods) - */ - status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, - ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, - &space_id, NULL); - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_reg_run - * - * PARAMETERS: walk_namespace callback - * - * DESCRIPTION: Run _REG method for region objects of the requested space_iD - * - ******************************************************************************/ - -static acpi_status -acpi_ev_reg_run(acpi_handle obj_handle, - u32 level, void *context, void **return_value) -{ - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *node; - acpi_adr_space_type space_id; - acpi_status status; - - space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); - - /* Convert and validate the device handle */ - - node = acpi_ns_map_handle_to_node(obj_handle); - if (!node) { - return (AE_BAD_PARAMETER); - } - - /* - * We only care about regions.and objects - * that are allowed to have address space handlers - */ - if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { - return (AE_OK); - } - - /* Check for an existing internal object */ - - obj_desc = acpi_ns_get_attached_object(node); - if (!obj_desc) { - - /* No object, just exit */ - - return (AE_OK); - } - - /* Object is a Region */ - - if (obj_desc->region.space_id != space_id) { - /* - * This region is for a different address space - * -- just ignore it - */ - return (AE_OK); - } - - status = acpi_ev_execute_reg_method(obj_desc, 1); - return (status); -} |