[PATCH] drm/amdgpu/sriov: Need to initialize the HDP_NONSURFACE_BAStE

Deucher, Alexander Alexander.Deucher at amd.com
Tue May 14 14:17:06 UTC 2019


> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Christian K├Ânig
> Sent: Tuesday, May 14, 2019 6:34 AM
> To: Zhou, Tiecheng <Tiecheng.Zhou at amd.com>; amd-
> gfx at lists.freedesktop.org
> Cc: Deng, Emily <Emily.Deng at amd.com>
> Subject: Re: [PATCH] drm/amdgpu/sriov: Need to initialize the
> HDP_NONSURFACE_BAStE
> 
> [CAUTION: External Email]
> 
> Am 14.05.19 um 12:24 schrieb Tiecheng Zhou:
> > it requires to initialize HDP_NONSURFACE_BASE, so as to avoid using
> > the value left by a previous VM under sriov scenario.
> >
> > Signed-off-by: Emily Deng <Emily.Deng at amd.com>
> > Signed-off-by: Tiecheng Zhou <Tiecheng.Zhou at amd.com>
> 
> Would it hurt us to also do this on bare metal?
> 

Vbios Asic_init handles this for us on bare metal.

Alex

> Apart from that looks good to me,
> Christian.
> 
> > ---
> >   drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 5 +++++
> >   1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > index be729e7..e96684e 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > @@ -1181,6 +1181,11 @@ static int gmc_v9_0_gart_enable(struct
> amdgpu_device *adev)
> >       tmp = RREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL);
> >       WREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL, tmp);
> >
> > +     if (amdgpu_sriov_vf(adev)) {
> > +             WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE, (adev-
> >gmc.vram_start >> 8));
> > +             WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE_HI, (adev-
> >gmc.vram_start >> 40));
> > +     }
> > +
> >       /* After HDP is initialized, flush HDP.*/
> >       adev->nbio_funcs->hdp_flush(adev, NULL);
> >
> 
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