diff options
Diffstat (limited to 'drivers/acpi/acpica/evrgnini.c')
| -rw-r--r-- | drivers/acpi/acpica/evrgnini.c | 684 |
1 files changed, 684 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c new file mode 100644 index 000000000000..1b7f9fdbef15 --- /dev/null +++ b/drivers/acpi/acpica/evrgnini.c @@ -0,0 +1,684 @@ +/****************************************************************************** + * + * Module Name: evrgnini- ACPI address_space (op_region) init + * + *****************************************************************************/ + +/* + * 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/accommon.h> +#include <acpi/acevents.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_EVENTS +ACPI_MODULE_NAME("evrgnini") + +/* Local prototypes */ +static u8 acpi_ev_match_pci_root_bridge(char *id); + +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; + 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; + 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 = 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) { + + /* 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 = 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_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 = acpi_ns_get_parent_node(pci_device_node); + } + + 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 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_match_pci_root_bridge + * + * PARAMETERS: Id - The HID/CID in string format + * + * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge + * + * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID. + * + ******************************************************************************/ + +static u8 acpi_ev_match_pci_root_bridge(char *id) +{ + + /* + * Check if this is a PCI root. + * ACPI 3.0+: check for a PCI Express root also. + */ + if (!(ACPI_STRNCMP(id, + PCI_ROOT_HID_STRING, + sizeof(PCI_ROOT_HID_STRING))) || + !(ACPI_STRNCMP(id, + PCI_EXPRESS_ROOT_HID_STRING, + sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) { + return (TRUE); + } + + return (FALSE); +} + +/******************************************************************************* + * + * 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 acpica_device_id hid; + struct acpi_compatible_id_list *cid; + u32 i; + + /* Get the _HID and check for a PCI Root Bridge */ + + status = acpi_ut_execute_HID(node, &hid); + if (ACPI_FAILURE(status)) { + return (FALSE); + } + + if (acpi_ev_match_pci_root_bridge(hid.value)) { + 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_ev_match_pci_root_bridge(cid->id[i].value)) { + 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 = 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_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; + + 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 RegionType %s(%X) (RegionObj %p)\n", + acpi_ut_get_region_name(space_id), space_id, + region_obj)); + + return_ACPI_STATUS(AE_NOT_EXIST); +} |