153 lines
4.3 KiB
C
153 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2014-2016 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
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS 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 __INTEL_FRONTBUFFER_H__
|
|
#define __INTEL_FRONTBUFFER_H__
|
|
|
|
#include <linux/atomic.h>
|
|
#include <linux/kref.h>
|
|
|
|
#include "gem/i915_gem_object_types.h"
|
|
#include "i915_active.h"
|
|
|
|
struct drm_i915_private;
|
|
|
|
enum fb_op_origin {
|
|
ORIGIN_GTT,
|
|
ORIGIN_CPU,
|
|
ORIGIN_CS,
|
|
ORIGIN_FLIP,
|
|
ORIGIN_DIRTYFB,
|
|
};
|
|
|
|
struct intel_frontbuffer {
|
|
struct kref ref;
|
|
atomic_t bits;
|
|
struct i915_active write;
|
|
struct drm_i915_gem_object *obj;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
void intel_frontbuffer_flip_prepare(struct drm_i915_private *i915,
|
|
unsigned frontbuffer_bits);
|
|
void intel_frontbuffer_flip_complete(struct drm_i915_private *i915,
|
|
unsigned frontbuffer_bits);
|
|
void intel_frontbuffer_flip(struct drm_i915_private *i915,
|
|
unsigned frontbuffer_bits);
|
|
|
|
void intel_frontbuffer_put(struct intel_frontbuffer *front);
|
|
|
|
static inline struct intel_frontbuffer *
|
|
__intel_frontbuffer_get(const struct drm_i915_gem_object *obj)
|
|
{
|
|
struct intel_frontbuffer *front;
|
|
|
|
if (likely(!rcu_access_pointer(obj->frontbuffer)))
|
|
return NULL;
|
|
|
|
rcu_read_lock();
|
|
do {
|
|
front = rcu_dereference(obj->frontbuffer);
|
|
if (!front)
|
|
break;
|
|
|
|
if (unlikely(!kref_get_unless_zero(&front->ref)))
|
|
continue;
|
|
|
|
if (likely(front == rcu_access_pointer(obj->frontbuffer)))
|
|
break;
|
|
|
|
intel_frontbuffer_put(front);
|
|
} while (1);
|
|
rcu_read_unlock();
|
|
|
|
return front;
|
|
}
|
|
|
|
struct intel_frontbuffer *
|
|
intel_frontbuffer_get(struct drm_i915_gem_object *obj);
|
|
|
|
void __intel_fb_invalidate(struct intel_frontbuffer *front,
|
|
enum fb_op_origin origin,
|
|
unsigned int frontbuffer_bits);
|
|
|
|
/**
|
|
* intel_frontbuffer_invalidate - invalidate frontbuffer object
|
|
* @front: GEM object to invalidate
|
|
* @origin: which operation caused the invalidation
|
|
*
|
|
* This function gets called every time rendering on the given object starts and
|
|
* frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
|
|
* be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
|
|
* until the rendering completes or a flip on this frontbuffer plane is
|
|
* scheduled.
|
|
*/
|
|
static inline bool intel_frontbuffer_invalidate(struct intel_frontbuffer *front,
|
|
enum fb_op_origin origin)
|
|
{
|
|
unsigned int frontbuffer_bits;
|
|
|
|
if (!front)
|
|
return false;
|
|
|
|
frontbuffer_bits = atomic_read(&front->bits);
|
|
if (!frontbuffer_bits)
|
|
return false;
|
|
|
|
__intel_fb_invalidate(front, origin, frontbuffer_bits);
|
|
return true;
|
|
}
|
|
|
|
void __intel_fb_flush(struct intel_frontbuffer *front,
|
|
enum fb_op_origin origin,
|
|
unsigned int frontbuffer_bits);
|
|
|
|
/**
|
|
* intel_frontbuffer_flush - flush frontbuffer object
|
|
* @front: GEM object to flush
|
|
* @origin: which operation caused the flush
|
|
*
|
|
* This function gets called every time rendering on the given object has
|
|
* completed and frontbuffer caching can be started again.
|
|
*/
|
|
static inline void intel_frontbuffer_flush(struct intel_frontbuffer *front,
|
|
enum fb_op_origin origin)
|
|
{
|
|
unsigned int frontbuffer_bits;
|
|
|
|
if (!front)
|
|
return;
|
|
|
|
frontbuffer_bits = atomic_read(&front->bits);
|
|
if (!frontbuffer_bits)
|
|
return;
|
|
|
|
__intel_fb_flush(front, origin, frontbuffer_bits);
|
|
}
|
|
|
|
void intel_frontbuffer_track(struct intel_frontbuffer *old,
|
|
struct intel_frontbuffer *new,
|
|
unsigned int frontbuffer_bits);
|
|
|
|
#endif /* __INTEL_FRONTBUFFER_H__ */
|