Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Lin Ming | 308 | 95.06% | 1 | 16.67% |
Robert Moore | 11 | 3.40% | 2 | 33.33% |
Linus Torvalds (pre-git) | 3 | 0.93% | 1 | 16.67% |
Linus Torvalds | 1 | 0.31% | 1 | 16.67% |
Erik Schmauss | 1 | 0.31% | 1 | 16.67% |
Total | 324 | 6 |
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /******************************************************************************* * * Module Name: utxfmutex - external AML mutex access functions * ******************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME("utxfmutex") /* Local prototypes */ static acpi_status acpi_ut_get_mutex_object(acpi_handle handle, acpi_string pathname, union acpi_operand_object **ret_obj); /******************************************************************************* * * FUNCTION: acpi_ut_get_mutex_object * * PARAMETERS: handle - Mutex or prefix handle (optional) * pathname - Mutex pathname (optional) * ret_obj - Where the mutex object is returned * * RETURN: Status * * DESCRIPTION: Get an AML mutex object. The mutex node is pointed to by * Handle:Pathname. Either Handle or Pathname can be NULL, but * not both. * ******************************************************************************/ static acpi_status acpi_ut_get_mutex_object(acpi_handle handle, acpi_string pathname, union acpi_operand_object **ret_obj) { struct acpi_namespace_node *mutex_node; union acpi_operand_object *mutex_obj; acpi_status status; /* Parameter validation */ if (!ret_obj || (!handle && !pathname)) { return (AE_BAD_PARAMETER); } /* Get a the namespace node for the mutex */ mutex_node = handle; if (pathname != NULL) { status = acpi_get_handle(handle, pathname, ACPI_CAST_PTR(acpi_handle, &mutex_node)); if (ACPI_FAILURE(status)) { return (status); } } /* Ensure that we actually have a Mutex object */ if (!mutex_node || (mutex_node->type != ACPI_TYPE_MUTEX)) { return (AE_TYPE); } /* Get the low-level mutex object */ mutex_obj = acpi_ns_get_attached_object(mutex_node); if (!mutex_obj) { return (AE_NULL_OBJECT); } *ret_obj = mutex_obj; return (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_acquire_mutex * * PARAMETERS: handle - Mutex or prefix handle (optional) * pathname - Mutex pathname (optional) * timeout - Max time to wait for the lock (millisec) * * RETURN: Status * * DESCRIPTION: Acquire an AML mutex. This is a device driver interface to * AML mutex objects, and allows for transaction locking between * drivers and AML code. The mutex node is pointed to by * Handle:Pathname. Either Handle or Pathname can be NULL, but * not both. * ******************************************************************************/ acpi_status acpi_acquire_mutex(acpi_handle handle, acpi_string pathname, u16 timeout) { acpi_status status; union acpi_operand_object *mutex_obj; /* Get the low-level mutex associated with Handle:Pathname */ status = acpi_ut_get_mutex_object(handle, pathname, &mutex_obj); if (ACPI_FAILURE(status)) { return (status); } /* Acquire the OS mutex */ status = acpi_os_acquire_mutex(mutex_obj->mutex.os_mutex, timeout); return (status); } ACPI_EXPORT_SYMBOL(acpi_acquire_mutex) /******************************************************************************* * * FUNCTION: acpi_release_mutex * * PARAMETERS: handle - Mutex or prefix handle (optional) * pathname - Mutex pathname (optional) * * RETURN: Status * * DESCRIPTION: Release an AML mutex. This is a device driver interface to * AML mutex objects, and allows for transaction locking between * drivers and AML code. The mutex node is pointed to by * Handle:Pathname. Either Handle or Pathname can be NULL, but * not both. * ******************************************************************************/ acpi_status acpi_release_mutex(acpi_handle handle, acpi_string pathname) { acpi_status status; union acpi_operand_object *mutex_obj; /* Get the low-level mutex associated with Handle:Pathname */ status = acpi_ut_get_mutex_object(handle, pathname, &mutex_obj); if (ACPI_FAILURE(status)) { return (status); } /* Release the OS mutex */ acpi_os_release_mutex(mutex_obj->mutex.os_mutex); return (AE_OK); } ACPI_EXPORT_SYMBOL(acpi_release_mutex)
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