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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 "i915_drm.h"
#include "i915_drv.h"
/*
* Implements an intel sync flush operation.
*/
static void i915_perform_flush(drm_device_t * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
drm_fence_manager_t *fm = &dev->fm;
drm_fence_driver_t *driver = dev->driver->fence_driver;
int flush_completed = 0;
uint32_t flush_flags = 0;
uint32_t flush_sequence = 0;
uint32_t i_status;
uint32_t diff;
uint32_t sequence;
if (fm->pending_exe_flush) {
sequence = READ_BREADCRUMB(dev_priv);
diff = sequence - fm->last_exe_flush;
if (diff < driver->wrap_diff && diff != 0) {
drm_fence_handler(dev, sequence, DRM_FENCE_EXE);
diff = sequence - fm->exe_flush_sequence;
if (diff < driver->wrap_diff) {
fm->pending_exe_flush = 0;
/*
* Turn off user IRQs
*/
} else {
/*
* Turn on user IRQs
*/
}
}
}
if (dev_priv->flush_pending) {
i_status = READ_HWSP(dev_priv, 0);
if ((i_status & (1 << 12)) !=
(dev_priv->saved_flush_status & (1 << 12))) {
flush_completed = 1;
flush_flags = dev_priv->flush_flags;
flush_sequence = dev_priv->flush_sequence;
dev_priv->flush_pending = 0;
} else {
}
}
if (flush_completed) {
drm_fence_handler(dev, flush_sequence, flush_flags);
}
if (fm->pending_flush && !dev_priv->flush_pending) {
dev_priv->flush_sequence = (uint32_t) READ_BREADCRUMB(dev_priv);
dev_priv->flush_flags = fm->pending_flush;
dev_priv->saved_flush_status = READ_HWSP(dev_priv, 0);
DRM_ERROR("Saved flush status is 0x%08x\n",
dev_priv->saved_flush_status);
I915_WRITE(I915REG_INSTPM, (1 << 5) | (1 << 21));
dev_priv->flush_pending = 1;
fm->pending_flush = 0;
}
}
void i915_poke_flush(drm_device_t * dev)
{
drm_fence_manager_t *fm = &dev->fm;
unsigned long flags;
write_lock_irqsave(&fm->lock, flags);
i915_perform_flush(dev);
write_unlock_irqrestore(&fm->lock, flags);
}
int i915_fence_emit_sequence(drm_device_t * dev, uint32_t * sequence)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
i915_emit_irq(dev);
*sequence = (uint32_t) dev_priv->counter;
return 0;
}
void i915_fence_handler(drm_device_t * dev)
{
drm_fence_manager_t *fm = &dev->fm;
write_lock(&fm->lock);
i915_perform_flush(dev);
i915_perform_flush(dev);
write_unlock(&fm->lock);
}
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