Am 03.10.19 um 10:03 schrieb Pelloux-prayer, Pierre-eric:
This can be safely skipped entirely.
This seems to help with https://bugs.freedesktop.org/show_bug.cgi?id=111481.
NAK, please instead fix gmc_v10_0_flush_gpu_tlb to include at least some
NOP in the submitted IBs.
Christian.
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 60655834d649..aa163e679f1f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -227,6 +227,11 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
!amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
continue;
+ if (ib->length_dw == 0) {
+ /* On Navi gmc_v10_0_flush_gpu_tlb emits 0 sized IB */
+ continue;
+ }
+
amdgpu_ring_emit_ib(ring, job, ib, status);
status &= ~AMDGPU_HAVE_CTX_SWITCH;
}
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