[PATCH] drm/amdgpu: Enable translate_further to extend UTCL2 reach

[Russell, Kent]

[AMD Official Use Only - General]

You can throw an Acked-by Kent Russell <kent.russell at amd.com> as well . Not sure if there's someone who wants to provide a more concrete RB.

 Kent

> -----Original Message-----
> From: Kuehling, Felix <Felix.Kuehling at amd.com>
> Sent: Thursday, August 4, 2022 2:54 PM
> To: Greathouse, Joseph <Joseph.Greathouse at amd.com>; amd-
> gfx at lists.freedesktop.org
> Cc: Russell, Kent <Kent.Russell at amd.com>; Koenig, Christian
> <Christian.Koenig at amd.com>
> Subject: Re: [PATCH] drm/amdgpu: Enable translate_further to extend UTCL2
> reach
> 
> On 2022-08-04 12:01, Joseph Greathouse wrote:
> > Enable translate_further on Arcturus and Aldebaran server chips
> > in order to increase the UTCL2 reach from 8 GiB to 64 GiB,
> > which is more in line with the amount of framebuffer DRAM in
> > the devices.
> >
> > Signed-off-by: Joseph Greathouse <Joseph.Greathouse at amd.com>
> 
> Acked-by: Felix Kuehling <Felix.Kuehling at amd.com>
> 
> 
> > ---
> >   drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 3 +++
> >   1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > index 22761a3bb818..ab89d91975ab 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> > @@ -1624,12 +1624,15 @@ static int gmc_v9_0_sw_init(void *handle)
> >   			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 47);
> >   		else
> >   			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
> > +		if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2))
> > +			adev->gmc.translate_further = adev-
> >vm_manager.num_level > 1;
> >   		break;
> >   	case IP_VERSION(9, 4, 1):
> >   		adev->num_vmhubs = 3;
> >
> >   		/* Keep the vm size same with Vega20 */
> >   		amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
> > +		adev->gmc.translate_further = adev->vm_manager.num_level >
> 1;
> >   		break;
> >   	default:
> >   		break;