No need to stall the pipe when we are using firmware with the
fix.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index adb8778..8f04857 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -311,6 +311,32 @@ error:
return r;
}
+static bool amdgpu_vm_ring_has_compute_vm_bug(struct amdgpu_ring *ring)
+{
+ struct amdgpu_device *adev = ring->adev;
+ const struct amdgpu_ip_block_version *ip_block;
+
+ if (ring->type != AMDGPU_RING_TYPE_COMPUTE)
+ /* only compute rings */
+ return false;
+
+ ip_block = amdgpu_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
+ if (!ip_block)
+ return false;
+
+ if (ip_block->major <= 7) {
+ /* gfx7 has no workaround */
+ return true;
+ } else if (ip_block->major == 8) {
+ if (adev->gfx.mec_fw_version >= 673)
+ /* gfx8 is fixed in MEC firmware 673 */
+ return false;
+ else
+ return true;
+ }
+ return false;
+}
+
/**
* amdgpu_vm_flush - hardware flush the vm
*
@@ -339,7 +365,7 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring,
if (ring->funcs->emit_pipeline_sync && (
pd_addr != AMDGPU_VM_NO_FLUSH || gds_switch_needed ||
- ring->type == AMDGPU_RING_TYPE_COMPUTE))
+ amdgpu_vm_ring_has_compute_vm_bug(ring)))
amdgpu_ring_emit_pipeline_sync(ring);
if (ring->funcs->emit_vm_flush &&
--
2.5.5
