[PATCH v2] mdkfd: To flush tlb for MMHUB of GFX9 series

[Liu, Aaron]

[AMD Official Use Only - General]

Reviewed-by: Aaron Liu <aaron.liu at amd.com>

> -----Original Message-----
> From: Ji, Ruili <Ruili.Ji at amd.com>
> Sent: Wednesday, June 22, 2022 2:46 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Liu, Aaron <Aaron.Liu at amd.com>; Ji, Ruili <Ruili.Ji at amd.com>; Yang,
> Philip <Philip.Yang at amd.com>; Deucher, Alexander
> <Alexander.Deucher at amd.com>
> Subject: [PATCH v2] mdkfd: To flush tlb for MMHUB of GFX9 series
> 
> 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.
> 
> v2:fix indentation
> 
> Signed-off-by: Ruili Ji <ruiliji2 at amd.com>
> Reviewed-by: Philip Yang <philip.yang at amd.com>
> Acked-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  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..1dfd82d5d379 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