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/*
* Copyright (c) 2011, Intel Corporation.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*
* Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
*/
#include <drm/drmP.h>
#include "psb_drv.h"
#include "psb_msvdx.h"
static void psb_fence_poll(struct ttm_fence_device *fdev,
uint32_t fence_class, uint32_t waiting_types)
{
struct drm_psb_private *dev_priv =
container_of(fdev, struct drm_psb_private, fdev);
uint32_t sequence = 0;
struct msvdx_private *msvdx_priv = dev_priv->msvdx_private;
if (unlikely(!dev_priv))
return;
if (waiting_types == 0)
return;
switch (fence_class) {
case PSB_ENGINE_VIDEO:
sequence = msvdx_priv->msvdx_current_sequence;
break;
default:
break;
}
/* DRM_ERROR("Polling fence sequence, got 0x%08x\n", sequence); */
ttm_fence_handler(fdev, fence_class, sequence,
_PSB_FENCE_TYPE_EXE, 0);
}
void psb_fence_error(struct drm_device *dev,
uint32_t fence_class,
uint32_t sequence, uint32_t type, int error)
{
struct drm_psb_private *dev_priv = psb_priv(dev);
struct ttm_fence_device *fdev = &dev_priv->fdev;
unsigned long irq_flags;
struct ttm_fence_class_manager *fc =
&fdev->fence_class[fence_class];
BUG_ON(fence_class >= PSB_NUM_ENGINES);
write_lock_irqsave(&fc->lock, irq_flags);
ttm_fence_handler(fdev, fence_class, sequence, type, error);
write_unlock_irqrestore(&fc->lock, irq_flags);
}
int psb_fence_emit_sequence(struct ttm_fence_device *fdev,
uint32_t fence_class,
uint32_t flags, uint32_t *sequence,
unsigned long *timeout_jiffies)
{
struct drm_psb_private *dev_priv =
container_of(fdev, struct drm_psb_private, fdev);
uint32_t seq = 0;
if (!dev_priv)
return -EINVAL;
if (fence_class >= PSB_NUM_ENGINES)
return -EINVAL;
switch (fence_class) {
case PSB_ENGINE_VIDEO:
spin_lock(&dev_priv->sequence_lock);
seq = dev_priv->sequence[fence_class]++;
spin_unlock(&dev_priv->sequence_lock);
break;
default:
DRM_ERROR("Unexpected fence class\n");
return -EINVAL;
}
*sequence = seq;
*timeout_jiffies = jiffies + DRM_HZ * 3;
return 0;
}
static void psb_fence_lockup(struct ttm_fence_object *fence,
uint32_t fence_types)
{
struct ttm_fence_device *fdev = fence->fdev;
struct ttm_fence_class_manager *fc = ttm_fence_fc(fence);
struct drm_psb_private *dev_priv =
container_of(fdev, struct drm_psb_private, fdev);
struct drm_device *dev = (struct drm_device *)dev_priv->dev;
if (fence->fence_class == PSB_ENGINE_VIDEO) {
struct msvdx_private *msvdx_priv = dev_priv->msvdx_private;
DRM_ERROR("MSVDX timeout (probable lockup) detected, flush queued cmdbuf");
psb_msvdx_flush_cmd_queue(dev);
write_lock(&fc->lock);
ttm_fence_handler(fence->fdev, fence->fence_class,
fence->sequence, fence_types, -EBUSY);
write_unlock(&fc->lock);
msvdx_priv->msvdx_needs_reset = 1;
} else
DRM_ERROR("Unsupported fence class\n");
}
void psb_fence_handler(struct drm_device *dev, uint32_t fence_class)
{
struct drm_psb_private *dev_priv = psb_priv(dev);
struct ttm_fence_device *fdev = &dev_priv->fdev;
struct ttm_fence_class_manager *fc =
&fdev->fence_class[fence_class];
unsigned long irq_flags;
write_lock_irqsave(&fc->lock, irq_flags);
psb_fence_poll(fdev, fence_class, fc->waiting_types);
write_unlock_irqrestore(&fc->lock, irq_flags);
}
static struct ttm_fence_driver psb_ttm_fence_driver = {
.has_irq = NULL,
.emit = psb_fence_emit_sequence,
.flush = NULL,
.poll = psb_fence_poll,
.needed_flush = NULL,
.wait = NULL,
.signaled = NULL,
.lockup = psb_fence_lockup,
};
int psb_ttm_fence_device_init(struct ttm_fence_device *fdev)
{
struct drm_psb_private *dev_priv =
container_of(fdev, struct drm_psb_private, fdev);
struct ttm_fence_class_init fci = {.wrap_diff = (1 << 30),
.flush_diff = (1 << 29),
.sequence_mask = 0xFFFFFFFF
};
return ttm_fence_device_init(PSB_NUM_ENGINES,
dev_priv->mem_global_ref.object,
fdev, &fci, 1,
&psb_ttm_fence_driver);
}
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