[PATCH] drm/amdkfd: To flush tlb for MMHUB of GFX9 series

[Alex Deucher]

Acked-by: Alex Deucher <alexander.deucher at amd.com>

On Mon, Jun 20, 2022 at 10:26 PM Ji, Ruili <ruili.ji at amd.com> wrote:
>
> From: Ruili Ji <ruiliji2 at amd.com>
>
> amdgpu: [mmhub0] no-retry page fault (src_id:0 ring:40 vmid:8 pasid:32769, for process test_basic pid 3305 thread test_basic pid 3305)
> amdgpu: in page starting at address 0x00007ff990003000 from IH client 0x12 (VMC)
> amdgpu: VM_L2_PROTECTION_FAULT_STATUS:0x00840051
> amdgpu: Faulty UTCL2 client ID: MP1 (0x0)
> amdgpu: MORE_FAULTS: 0x1
> amdgpu: WALKER_ERROR: 0x0
> amdgpu: PERMISSION_FAULTS: 0x5
> amdgpu: MAPPING_ERROR: 0x0
> amdgpu: RW: 0x1
>
> When memory is allocated by kfd, no one triggers the tlb flush for MMHUB0.
> There is page fault from MMHUB0.
>
> Signed-off-by: Ruili Ji <ruiliji2 at amd.com>
> Change-Id: I97786f02849dd047703d6e8feff53916b307715c
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> index 1d0c9762ebfb..12fc822c0a92 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> @@ -739,7 +739,8 @@ int amdgpu_amdkfd_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
>  {
>         bool all_hub = false;
>
> -       if (adev->family == AMDGPU_FAMILY_AI)
> +       if (adev->family == AMDGPU_FAMILY_AI
> +               || adev->family == AMDGPU_FAMILY_RV)
>                 all_hub = true;
>
>         return amdgpu_gmc_flush_gpu_tlb_pasid(adev, pasid, flush_type, all_hub);
> --
> 2.25.1
>