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/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
* All Rights Reserved.
*
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*
**************************************************************************/
/*
* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "drmP.h"
#include "drm.h"
#include "radeon_drm.h"
#include "radeon_drv.h"
int radeon_fence_emit_sequence(struct drm_device *dev, uint32_t class,
uint32_t flags, uint32_t *sequence,
uint32_t *native_type)
{
struct drm_radeon_private *dev_priv = (struct drm_radeon_private *) dev->dev_private;
if (!dev_priv)
return -EINVAL;
radeon_emit_irq(dev);
DRM_DEBUG("emitting %d\n", dev_priv->counter);
*sequence = (uint32_t) dev_priv->counter;
*native_type = DRM_FENCE_TYPE_EXE;
return 0;
}
static void radeon_fence_poll(struct drm_device *dev, uint32_t fence_class,
uint32_t waiting_types)
{
struct drm_radeon_private *dev_priv = (struct drm_radeon_private *) dev->dev_private;
uint32_t sequence;
sequence = RADEON_READ(RADEON_SCRATCH_REG3);
/* this used to be READ_BREADCRUMB(dev_priv); but it caused
* a race somewhere in the fencing irq
*/
DRM_DEBUG("polling %d\n", sequence);
drm_fence_handler(dev, 0, sequence,
DRM_FENCE_TYPE_EXE, 0);
}
void radeon_fence_handler(struct drm_device * dev)
{
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[0];
write_lock(&fm->lock);
radeon_fence_poll(dev, 0, fc->waiting_types);
write_unlock(&fm->lock);
}
int radeon_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
{
/*
* We have an irq that tells us when we have a new breadcrumb.
*/
return 1;
}
struct drm_fence_driver radeon_fence_driver = {
.num_classes = 1,
.wrap_diff = (1U << (BREADCRUMB_BITS -1)),
.flush_diff = (1U << (BREADCRUMB_BITS - 2)),
.sequence_mask = BREADCRUMB_MASK,
.emit = radeon_fence_emit_sequence,
.has_irq = radeon_fence_has_irq,
.poll = radeon_fence_poll,
};
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