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drm: use dma_fence_unwrap_merge() in drm_syncobj

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The unwrap merge function is now intended for this use case.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220518135844.3338-6-christian.koenig@amd.com
This commit is contained in:
Christian König 2022-05-04 13:34:03 +02:00
parent 245a4a7b53
commit ec8d985ff2
1 changed files with 7 additions and 50 deletions
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57
drivers/gpu/drm/drm_syncobj.c
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@ -184,6 +184,7 @@
*/
#include <linux/anon_inodes.h>
#include <linux/dma-fence-unwrap.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/sched/signal.h>
@ -853,57 +854,12 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
&args->handle);
}
/*
* Try to flatten a dma_fence_chain into a dma_fence_array so that it can be
* added as timeline fence to a chain again.
*/
static int drm_syncobj_flatten_chain(struct dma_fence **f)
{
struct dma_fence_chain *chain = to_dma_fence_chain(*f);
struct dma_fence *tmp, **fences;
struct dma_fence_array *array;
unsigned int count;
if (!chain)
return 0;
count = 0;
dma_fence_chain_for_each(tmp, &chain->base)
++count;
fences = kmalloc_array(count, sizeof(*fences), GFP_KERNEL);
if (!fences)
return -ENOMEM;
count = 0;
dma_fence_chain_for_each(tmp, &chain->base)
fences[count++] = dma_fence_get(tmp);
array = dma_fence_array_create(count, fences,
dma_fence_context_alloc(1),
1, false);
if (!array)
goto free_fences;
dma_fence_put(*f);
*f = &array->base;
return 0;
free_fences:
while (count--)
dma_fence_put(fences[count]);
kfree(fences);
return -ENOMEM;
}
static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
struct drm_syncobj_transfer *args)
{
struct drm_syncobj *timeline_syncobj = NULL;
struct dma_fence *fence, *tmp;
struct dma_fence_chain *chain;
struct dma_fence *fence;
int ret;
timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle);
@ -912,13 +868,14 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
}
ret = drm_syncobj_find_fence(file_private, args->src_handle,
args->src_point, args->flags,
&fence);
&tmp);
if (ret)
goto err_put_timeline;
ret = drm_syncobj_flatten_chain(&fence);
if (ret)
goto err_free_fence;
fence = dma_fence_unwrap_merge(tmp);
dma_fence_put(tmp);
if (!fence)
goto err_put_timeline;
chain = dma_fence_chain_alloc();
if (!chain) {