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

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[ Upstream commit 75dda67c72 ]

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: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Stable-dep-of: edcfe22985 ("drm/amdkfd: Insert missing TLB flush on GFX10 and later")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Philip Yang
2023-02-09 18:23:16 -05:00
committed by Greg Kroah-Hartman
parent 52c7b41ad6
commit 9becfff9f9
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
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@@ -1349,9 +1349,9 @@ 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);
}