[AMD Official Use Only - General]
> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Hamza
> Mahfooz
> Sent: Friday, March 17, 2023 3:58 PM
> To: Sider, Graham <Graham.Sider@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Kuehling, Felix <Felix.Kuehling@xxxxxxx>
> Subject: Re: [PATCH] drm/amdgpu: add print for iommu translation mode
>
>
> On 3/17/23 15:47, Graham Sider wrote:
> > Add log to display whether RAM is direct vs DMA mapped.
> >
> > Signed-off-by: Graham Sider <Graham.Sider@xxxxxxx>
>
> If this information is only useful for debugging purposes, please use
> drm_dbg() instead of pr_info().
>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > index 8bba5e6872a1..8797a9523244 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > @@ -3528,8 +3528,12 @@ static void
> amdgpu_device_check_iommu_direct_map(struct amdgpu_device *adev)
> > struct iommu_domain *domain;
> >
> > domain = iommu_get_domain_for_dev(adev->dev);
> > - if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY)
> > + if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY) {
> > + pr_info("RAM is direct mapped to GPU (not traslated by
traslated -> translated
Kent
> IOMMU)\n");
> > adev->ram_is_direct_mapped = true;
> > + } else {
> > + pr_info("RAM is DMA mapped to GPU (translated by
> IOMMU)\n");
> > + }
> > }
> >
> > static const struct attribute *amdgpu_dev_attributes[] = {
>
> --
> Hamza
