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drm/amdgpu: use dma_resv_for_each_fence for CS workaround v2

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Get the write fence using dma_resv_for_each_fence instead of accessing
it manually.

v2: add TODO comment

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220321135856.1331-9-christian.koenig@amd.com
This commit is contained in:
Christian König 2021-11-03 13:22:42 +01:00
parent 9b53fddf3f
commit 644704740b
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
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@ -1267,18 +1267,23 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
amdgpu_bo_list_for_each_entry(e, p->bo_list) {
struct dma_resv *resv = e->tv.bo->base.resv;
struct dma_fence_chain *chain = e->chain;
struct dma_resv_iter cursor;
struct dma_fence *fence;
if (!chain)
continue;
/*
* Work around dma_resv shortcommings by wrapping up the
* submission in a dma_fence_chain and add it as exclusive
* Temporary workaround dma_resv shortcommings by wrapping up
* the submission in a dma_fence_chain and add it as exclusive
* fence.
*
* TODO: Remove together with dma_resv rework.
*/
dma_fence_chain_init(chain, dma_resv_excl_fence(resv),
dma_fence_get(p->fence), 1);
dma_resv_for_each_fence(&cursor, resv, false, fence) {
break;
}
dma_fence_chain_init(chain, fence, dma_fence_get(p->fence), 1);
rcu_assign_pointer(resv->fence_excl, &chain->base);
e->chain = NULL;
}