92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
|
|
* Copyright 2013 Red Hat Inc.
|
|
*
|
|
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
|
|
*
|
|
* Authors: Dave Airlie
|
|
* Alon Levy
|
|
*/
|
|
|
|
|
|
#include "qxl_drv.h"
|
|
|
|
/* QXL fencing-
|
|
|
|
When we submit operations to the GPU we pass a release reference to the GPU
|
|
with them, the release reference is then added to the release ring when
|
|
the GPU is finished with that particular operation and has removed it from
|
|
its tree.
|
|
|
|
So we have can have multiple outstanding non linear fences per object.
|
|
|
|
From a TTM POV we only care if the object has any outstanding releases on
|
|
it.
|
|
|
|
we wait until all outstanding releases are processeed.
|
|
|
|
sync object is just a list of release ids that represent that fence on
|
|
that buffer.
|
|
|
|
we just add new releases onto the sync object attached to the object.
|
|
|
|
This currently uses a radix tree to store the list of release ids.
|
|
|
|
For some reason every so often qxl hw fails to release, things go wrong.
|
|
*/
|
|
/* must be called with the fence lock held */
|
|
void qxl_fence_add_release_locked(struct qxl_fence *qfence, uint32_t rel_id)
|
|
{
|
|
radix_tree_insert(&qfence->tree, rel_id, qfence);
|
|
qfence->num_active_releases++;
|
|
}
|
|
|
|
int qxl_fence_remove_release(struct qxl_fence *qfence, uint32_t rel_id)
|
|
{
|
|
void *ret;
|
|
int retval = 0;
|
|
struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence);
|
|
|
|
spin_lock(&bo->tbo.bdev->fence_lock);
|
|
|
|
ret = radix_tree_delete(&qfence->tree, rel_id);
|
|
if (ret == qfence)
|
|
qfence->num_active_releases--;
|
|
else {
|
|
DRM_DEBUG("didn't find fence in radix tree for %d\n", rel_id);
|
|
retval = -ENOENT;
|
|
}
|
|
spin_unlock(&bo->tbo.bdev->fence_lock);
|
|
return retval;
|
|
}
|
|
|
|
|
|
int qxl_fence_init(struct qxl_device *qdev, struct qxl_fence *qfence)
|
|
{
|
|
qfence->qdev = qdev;
|
|
qfence->num_active_releases = 0;
|
|
INIT_RADIX_TREE(&qfence->tree, GFP_ATOMIC);
|
|
return 0;
|
|
}
|
|
|
|
void qxl_fence_fini(struct qxl_fence *qfence)
|
|
{
|
|
kfree(qfence->release_ids);
|
|
qfence->num_active_releases = 0;
|
|
}
|