diff options
Diffstat (limited to 'drivers/acpi/acpica/nsxfeval.c')
| -rw-r--r-- | drivers/acpi/acpica/nsxfeval.c | 315 |
1 files changed, 229 insertions, 86 deletions
diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c index 71d15f61807..4bd558bf10d 100644 --- a/drivers/acpi/acpica/nsxfeval.c +++ b/drivers/acpi/acpica/nsxfeval.c @@ -6,7 +6,7 @@ ******************************************************************************/ /* - * Copyright (C) 2000 - 2012, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -42,7 +42,8 @@ * POSSIBILITY OF SUCH DAMAGES. */ -#include <linux/export.h> +#define EXPORT_ACPI_INTERFACES + #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" @@ -58,19 +59,19 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info); * * FUNCTION: acpi_evaluate_object_typed * - * PARAMETERS: Handle - Object handle (optional) - * Pathname - Object pathname (optional) + * PARAMETERS: handle - Object handle (optional) + * pathname - Object pathname (optional) * external_params - List of parameters to pass to method, - * terminated by NULL. May be NULL + * terminated by NULL. May be NULL * if no parameters are being passed. * return_buffer - Where to put method's return value (if - * any). If NULL, no value is returned. + * any). If NULL, no value is returned. * return_type - Expected type of return object * * RETURN: Status * * DESCRIPTION: Find and evaluate the given object, passing the given - * parameters if necessary. One of "Handle" or "Pathname" must + * parameters if necessary. One of "Handle" or "Pathname" must * be valid (non-null) * ******************************************************************************/ @@ -83,7 +84,7 @@ acpi_evaluate_object_typed(acpi_handle handle, acpi_object_type return_type) { acpi_status status; - u8 must_free = FALSE; + u8 free_buffer_on_error = FALSE; ACPI_FUNCTION_TRACE(acpi_evaluate_object_typed); @@ -94,14 +95,13 @@ acpi_evaluate_object_typed(acpi_handle handle, } if (return_buffer->length == ACPI_ALLOCATE_BUFFER) { - must_free = TRUE; + free_buffer_on_error = TRUE; } /* Evaluate the object */ - status = - acpi_evaluate_object(handle, pathname, external_params, - return_buffer); + status = acpi_evaluate_object(handle, pathname, + external_params, return_buffer); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } @@ -134,11 +134,15 @@ acpi_evaluate_object_typed(acpi_handle handle, pointer)->type), acpi_ut_get_type_name(return_type))); - if (must_free) { - - /* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */ - - ACPI_FREE(return_buffer->pointer); + if (free_buffer_on_error) { + /* + * Free a buffer created via ACPI_ALLOCATE_BUFFER. + * Note: We use acpi_os_free here because acpi_os_allocate was used + * to allocate the buffer. This purposefully bypasses the + * (optionally enabled) allocation tracking mechanism since we + * only want to track internal allocations. + */ + acpi_os_free(return_buffer->pointer); return_buffer->pointer = NULL; } @@ -152,18 +156,18 @@ ACPI_EXPORT_SYMBOL(acpi_evaluate_object_typed) * * FUNCTION: acpi_evaluate_object * - * PARAMETERS: Handle - Object handle (optional) - * Pathname - Object pathname (optional) + * PARAMETERS: handle - Object handle (optional) + * pathname - Object pathname (optional) * external_params - List of parameters to pass to method, - * terminated by NULL. May be NULL + * terminated by NULL. May be NULL * if no parameters are being passed. * return_buffer - Where to put method's return value (if - * any). If NULL, no value is returned. + * any). If NULL, no value is returned. * * RETURN: Status * * DESCRIPTION: Find and evaluate the given object, passing the given - * parameters if necessary. One of "Handle" or "Pathname" must + * parameters if necessary. One of "Handle" or "Pathname" must * be valid (non-null) * ******************************************************************************/ @@ -187,8 +191,6 @@ acpi_evaluate_object(acpi_handle handle, return_ACPI_STATUS(AE_NO_MEMORY); } - info->pathname = pathname; - /* Convert and validate the device handle */ info->prefix_node = acpi_ns_validate_handle(handle); @@ -198,17 +200,64 @@ acpi_evaluate_object(acpi_handle handle, } /* - * If there are parameters to be passed to a control method, the external - * objects must all be converted to internal objects + * Get the actual namespace node for the target object. + * Handles these cases: + * + * 1) Null node, valid pathname from root (absolute path) + * 2) Node and valid pathname (path relative to Node) + * 3) Node, Null pathname + */ + if ((pathname) && (ACPI_IS_ROOT_PREFIX(pathname[0]))) { + + /* The path is fully qualified, just evaluate by name */ + + info->prefix_node = NULL; + } else if (!handle) { + /* + * A handle is optional iff a fully qualified pathname is specified. + * Since we've already handled fully qualified names above, this is + * an error. + */ + if (!pathname) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Both Handle and Pathname are NULL")); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Null Handle with relative pathname [%s]", + pathname)); + } + + status = AE_BAD_PARAMETER; + goto cleanup; + } + + info->relative_pathname = pathname; + + /* + * Convert all external objects passed as arguments to the + * internal version(s). */ if (external_params && external_params->count) { + info->param_count = (u16)external_params->count; + + /* Warn on impossible argument count */ + + if (info->param_count > ACPI_METHOD_NUM_ARGS) { + ACPI_WARN_PREDEFINED((AE_INFO, pathname, + ACPI_WARN_ALWAYS, + "Excess arguments (%u) - using only %u", + info->param_count, + ACPI_METHOD_NUM_ARGS)); + + info->param_count = ACPI_METHOD_NUM_ARGS; + } + /* * Allocate a new parameter block for the internal objects * Add 1 to count to allow for null terminated internal list */ - info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) - external_params-> - count + + info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) info-> + param_count + 1) * sizeof(void *)); if (!info->parameters) { status = AE_NO_MEMORY; @@ -217,7 +266,7 @@ acpi_evaluate_object(acpi_handle handle, /* Convert each external object in the list to an internal object */ - for (i = 0; i < external_params->count; i++) { + for (i = 0; i < info->param_count; i++) { status = acpi_ut_copy_eobject_to_iobject(&external_params-> pointer[i], @@ -227,43 +276,96 @@ acpi_evaluate_object(acpi_handle handle, goto cleanup; } } - info->parameters[external_params->count] = NULL; + + info->parameters[info->param_count] = NULL; } +#if 0 + /* - * Three major cases: - * 1) Fully qualified pathname - * 2) No handle, not fully qualified pathname (error) - * 3) Valid handle + * Begin incoming argument count analysis. Check for too few args + * and too many args. */ - if ((pathname) && (acpi_ns_valid_root_prefix(pathname[0]))) { - /* The path is fully qualified, just evaluate by name */ + switch (acpi_ns_get_type(info->node)) { + case ACPI_TYPE_METHOD: + + /* Check incoming argument count against the method definition */ + + if (info->obj_desc->method.param_count > info->param_count) { + ACPI_ERROR((AE_INFO, + "Insufficient arguments (%u) - %u are required", + info->param_count, + info->obj_desc->method.param_count)); + + status = AE_MISSING_ARGUMENTS; + goto cleanup; + } + + else if (info->obj_desc->method.param_count < info->param_count) { + ACPI_WARNING((AE_INFO, + "Excess arguments (%u) - only %u are required", + info->param_count, + info->obj_desc->method.param_count)); + + /* Just pass the required number of arguments */ + + info->param_count = info->obj_desc->method.param_count; + } - info->prefix_node = NULL; - status = acpi_ns_evaluate(info); - } else if (!handle) { /* - * A handle is optional iff a fully qualified pathname is specified. - * Since we've already handled fully qualified names above, this is - * an error + * Any incoming external objects to be passed as arguments to the + * method must be converted to internal objects */ - if (!pathname) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Both Handle and Pathname are NULL")); - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Null Handle with relative pathname [%s]", - pathname)); + if (info->param_count) { + /* + * Allocate a new parameter block for the internal objects + * Add 1 to count to allow for null terminated internal list + */ + info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) + info-> + param_count + + 1) * + sizeof(void *)); + if (!info->parameters) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Convert each external object in the list to an internal object */ + + for (i = 0; i < info->param_count; i++) { + status = + acpi_ut_copy_eobject_to_iobject + (&external_params->pointer[i], + &info->parameters[i]); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + + info->parameters[info->param_count] = NULL; } + break; - status = AE_BAD_PARAMETER; - } else { - /* We have a namespace a node and a possible relative path */ + default: - status = acpi_ns_evaluate(info); + /* Warn if arguments passed to an object that is not a method */ + + if (info->param_count) { + ACPI_WARNING((AE_INFO, + "%u arguments were passed to a non-method ACPI object", + info->param_count)); + } + break; } +#endif + + /* Now we can evaluate the object */ + + status = acpi_ns_evaluate(info); + /* * If we are expecting a return value, and all went well above, * copy the return value to an external object. @@ -343,7 +445,7 @@ acpi_evaluate_object(acpi_handle handle, acpi_ex_exit_interpreter(); } - cleanup: +cleanup: /* Free the input parameter list (if we created one) */ @@ -364,7 +466,7 @@ ACPI_EXPORT_SYMBOL(acpi_evaluate_object) * * FUNCTION: acpi_ns_resolve_references * - * PARAMETERS: Info - Evaluation info block + * PARAMETERS: info - Evaluation info block * * RETURN: Info->return_object is replaced with the dereferenced object * @@ -413,6 +515,7 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) break; default: + return; } @@ -431,14 +534,14 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) * * FUNCTION: acpi_walk_namespace * - * PARAMETERS: Type - acpi_object_type to search for + * PARAMETERS: type - acpi_object_type to search for * start_object - Handle in namespace where search begins * max_depth - Depth to which search is to reach - * pre_order_visit - Called during tree pre-order visit + * descending_callback - Called during tree descent * when an object of "Type" is found - * post_order_visit - Called during tree post-order visit + * ascending_callback - Called during tree ascent * when an object of "Type" is found - * Context - Passed to user function(s) above + * context - Passed to user function(s) above * return_value - Location where return value of * user_function is put if terminated early * @@ -464,8 +567,8 @@ acpi_status acpi_walk_namespace(acpi_object_type type, acpi_handle start_object, u32 max_depth, - acpi_walk_callback pre_order_visit, - acpi_walk_callback post_order_visit, + acpi_walk_callback descending_callback, + acpi_walk_callback ascending_callback, void *context, void **return_value) { acpi_status status; @@ -475,7 +578,7 @@ acpi_walk_namespace(acpi_object_type type, /* Parameter validation */ if ((type > ACPI_TYPE_LOCAL_MAX) || - (!max_depth) || (!pre_order_visit && !post_order_visit)) { + (!max_depth) || (!descending_callback && !ascending_callback)) { return_ACPI_STATUS(AE_BAD_PARAMETER); } @@ -492,7 +595,7 @@ acpi_walk_namespace(acpi_object_type type, */ status = acpi_ut_acquire_read_lock(&acpi_gbl_namespace_rw_lock); if (ACPI_FAILURE(status)) { - return status; + return_ACPI_STATUS(status); } /* @@ -506,14 +609,22 @@ acpi_walk_namespace(acpi_object_type type, goto unlock_and_exit; } + /* Now we can validate the starting node */ + + if (!acpi_ns_validate_handle(start_object)) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit2; + } + status = acpi_ns_walk_namespace(type, start_object, max_depth, - ACPI_NS_WALK_UNLOCK, pre_order_visit, - post_order_visit, context, - return_value); + ACPI_NS_WALK_UNLOCK, + descending_callback, ascending_callback, + context, return_value); +unlock_and_exit2: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_read_lock(&acpi_gbl_namespace_rw_lock); return_ACPI_STATUS(status); } @@ -542,8 +653,8 @@ acpi_ns_get_device_callback(acpi_handle obj_handle, acpi_status status; struct acpi_namespace_node *node; u32 flags; - struct acpica_device_id *hid; - struct acpica_device_id_list *cid; + struct acpi_pnp_device_id *hid; + struct acpi_pnp_device_id_list *cid; u32 i; u8 found; int no_match; @@ -602,17 +713,22 @@ acpi_ns_get_device_callback(acpi_handle obj_handle, /* Walk the CID list */ - found = 0; + found = FALSE; for (i = 0; i < cid->count; i++) { if (ACPI_STRCMP(cid->ids[i].string, info->hid) == 0) { - found = 1; + + /* Found a matching CID */ + + found = TRUE; break; } } + ACPI_FREE(cid); - if (!found) + if (!found) { return (AE_OK); + } } } @@ -646,7 +762,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle, * * PARAMETERS: HID - HID to search for. Can be NULL. * user_function - Called when a matching object is found - * Context - Passed to user function + * context - Passed to user function * return_value - Location where return value of * user_function is put if terminated early * @@ -656,7 +772,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle, * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, * starting (and ending) at the object specified by start_handle. * The user_function is called whenever an object of type - * Device is found. If the user function returns + * Device is found. If the user function returns * a non-zero value, the search is terminated immediately and this * value is returned to the caller. * @@ -716,8 +832,8 @@ ACPI_EXPORT_SYMBOL(acpi_get_devices) * FUNCTION: acpi_attach_data * * PARAMETERS: obj_handle - Namespace node - * Handler - Handler for this attachment - * Data - Pointer to data to be attached + * handler - Handler for this attachment + * data - Pointer to data to be attached * * RETURN: Status * @@ -752,7 +868,7 @@ acpi_attach_data(acpi_handle obj_handle, status = acpi_ns_attach_data(node, handler, data); - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return (status); } @@ -764,7 +880,7 @@ ACPI_EXPORT_SYMBOL(acpi_attach_data) * FUNCTION: acpi_detach_data * * PARAMETERS: obj_handle - Namespace node handle - * Handler - Handler used in call to acpi_attach_data + * handler - Handler used in call to acpi_attach_data * * RETURN: Status * @@ -798,7 +914,7 @@ acpi_detach_data(acpi_handle obj_handle, acpi_object_handler handler) status = acpi_ns_detach_data(node, handler); - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return (status); } @@ -807,19 +923,22 @@ ACPI_EXPORT_SYMBOL(acpi_detach_data) /******************************************************************************* * - * FUNCTION: acpi_get_data + * FUNCTION: acpi_get_data_full * * PARAMETERS: obj_handle - Namespace node - * Handler - Handler used in call to attach_data - * Data - Where the data is returned + * handler - Handler used in call to attach_data + * data - Where the data is returned + * callback - function to execute before returning * * RETURN: Status * - * DESCRIPTION: Retrieve data that was previously attached to a namespace node. + * DESCRIPTION: Retrieve data that was previously attached to a namespace node + * and execute a callback before returning. * ******************************************************************************/ acpi_status -acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data) +acpi_get_data_full(acpi_handle obj_handle, acpi_object_handler handler, + void **data, void (*callback)(void *)) { struct acpi_namespace_node *node; acpi_status status; @@ -844,10 +963,34 @@ acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data) } status = acpi_ns_get_attached_data(node, handler, data); + if (ACPI_SUCCESS(status) && callback) { + callback(*data); + } - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return (status); } +ACPI_EXPORT_SYMBOL(acpi_get_data_full) + +/******************************************************************************* + * + * FUNCTION: acpi_get_data + * + * PARAMETERS: obj_handle - Namespace node + * handler - Handler used in call to attach_data + * data - Where the data is returned + * + * RETURN: Status + * + * DESCRIPTION: Retrieve data that was previously attached to a namespace node. + * + ******************************************************************************/ +acpi_status +acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data) +{ + return acpi_get_data_full(obj_handle, handler, data, NULL); +} + ACPI_EXPORT_SYMBOL(acpi_get_data) |