Commit 75dda67c authored by Philip Yang's avatar Philip Yang Committed by Alex Deucher
Browse files

drm/amdkfd: Flush TLB after unmapping for GFX v9.4.3 



kfd_flush_tlb_after_unmap should return true for GFX v9.4.3, to do TLB
heavyweight flush after unmapping from GPU to guarantee that the GPU
will not access pages after they have been unmapped. This also helps
improve the mapping to GPU performance.

Without this, KFD accidently flush TLB after mapping to GPU because the
vm update sequence number is increased by previous unmapping.

Signed-off-by: default avatarPhilip Yang <Philip.Yang@amd.com>
Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ac772a3c

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

+3 −3
Original line number Diff line number Diff line
@@ -1405,9 +1405,9 @@ void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type); 


static inline bool kfd_flush_tlb_after_unmap(struct kfd_dev *dev)

{

	return KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2) ||

	       (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 1) &&

	       dev->adev->sdma.instance[0].fw_version >= 18) ||

	return KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 3) ||

	       KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2) ||

	       (KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 1) && dev->sdma_fw_version >= 18) ||

	       KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 0);

}