84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
|
/*
|
||
|
|
* Internal Header for the Direct Rendering Manager
|
||
|
|
*
|
||
|
|
* Copyright 2018 Intel Corporation
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
* copy of this software and associated documentation files (the "Software"),
|
||
|
|
* to deal in the Software without restriction, including without limitation
|
||
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
||
|
|
* Software is furnished to do so, subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice (including the next
|
||
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
||
|
|
* Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
||
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
||
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _DRM_UTIL_H_
|
||
|
|
#define _DRM_UTIL_H_
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DOC: drm utils
|
||
|
|
*
|
||
|
|
* Macros and inline functions that does not naturally belong in other places
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/kgdb.h>
|
||
|
|
#include <linux/preempt.h>
|
||
|
|
#include <linux/smp.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Use EXPORT_SYMBOL_FOR_TESTS_ONLY() for functions that shall
|
||
|
|
* only be visible for drmselftests.
|
||
|
|
*/
|
||
|
|
#if defined(CONFIG_DRM_EXPORT_FOR_TESTS)
|
||
|
|
#define EXPORT_SYMBOL_FOR_TESTS_ONLY(x) EXPORT_SYMBOL(x)
|
||
|
|
#else
|
||
|
|
#define EXPORT_SYMBOL_FOR_TESTS_ONLY(x)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* for_each_if - helper for handling conditionals in various for_each macros
|
||
|
|
* @condition: The condition to check
|
||
|
|
*
|
||
|
|
* Typical use::
|
||
|
|
*
|
||
|
|
* #define for_each_foo_bar(x, y) \'
|
||
|
|
* list_for_each_entry(x, y->list, head) \'
|
||
|
|
* for_each_if(x->something == SOMETHING)
|
||
|
|
*
|
||
|
|
* The for_each_if() macro makes the use of for_each_foo_bar() less error
|
||
|
|
* prone.
|
||
|
|
*/
|
||
|
|
#define for_each_if(condition) if (!(condition)) {} else
|
||
|
|
|
||
|
|
/**
|
||
|
|
* drm_can_sleep - returns true if currently okay to sleep
|
||
|
|
*
|
||
|
|
* This function shall not be used in new code.
|
||
|
|
* The check for running in atomic context may not work - see linux/preempt.h.
|
||
|
|
*
|
||
|
|
* FIXME: All users of drm_can_sleep should be removed (see todo.rst)
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* False if kgdb is active, we are in atomic context or irqs are disabled.
|
||
|
|
*/
|
||
|
|
static inline bool drm_can_sleep(void)
|
||
|
|
{
|
||
|
|
if (in_atomic() || in_dbg_master() || irqs_disabled())
|
||
|
|
return false;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|