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drm/i915/gt: Only wait for GPU activity before unbinding a GGTT fence

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Only GPU activity via the GGTT fence is asynchronous, we know that we
control the CPU access directly, so we only need to wait for the GPU to
stop using the fence before we relinquish it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200401210104.15907-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2020-04-01 22:01:02 +01:00
parent 8a338f4bf6
commit 63baf4f3d5
3 changed files with 28 additions and 4 deletions
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4
drivers/gpu/drm/i915/i915_vma.c
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@@ -1232,6 +1232,10 @@ int i915_vma_move_to_active(struct i915_vma *vma,
dma_resv_add_shared_fence(vma->resv, &rq->fence);
obj->write_domain = 0;
}
if (flags & EXEC_OBJECT_NEEDS_FENCE && vma->fence)
i915_active_add_request(&vma->fence->active, rq);
obj->read_domains |= I915_GEM_GPU_DOMAINS;
obj->mm.dirty = true;