On Wed, Aug 22, 2018 at 11:44:04AM -0400, Andrey Grodzovsky wrote:
>
>
> On 08/22/2018 11:05 AM, Christian König wrote:
> >Should work on Vega10 as well, but with an obvious performance hit.
> >
> >Older APUs can be enabled as well, but will probably be more work.
Raven's VRAM is actually the system memory. May I know the benefit if we
switch the PD/PT BO from vram to gart?
> >
> >Signed-off-by: Christian König <christian.koenig at amd.com>
> >---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> >diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> >index 928fdae0dab4..670a42729f88 100644
> >--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> >+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> >@@ -308,6 +308,7 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> > list_move(&bo_base->vm_status, &vm->moved);
> > spin_unlock(&vm->moved_lock);
> > } else {
> >+ amdgpu_ttm_alloc_gart(&bo->tbo);
>
> Looks like you forgot to check for return value here.
>
Yes, the same comment with me.
Thanks,
Ray
> Andrey
>
> > list_move(&bo_base->vm_status, &vm->relocated);
> > }
> > }
> >@@ -396,6 +397,10 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
> > if (r)
> > goto error;
> >+ r = amdgpu_ttm_alloc_gart(&bo->tbo);
> >+ if (r)
> >+ return r;
> >+
> > r = amdgpu_job_alloc_with_ib(adev, 64, &job);
> > if (r)
> > goto error;
> >@@ -461,7 +466,11 @@ static void amdgpu_vm_bo_param(struct amdgpu_device *adev, struct amdgpu_vm *vm,
> > bp->size = amdgpu_vm_bo_size(adev, level);
> > bp->byte_align = AMDGPU_GPU_PAGE_SIZE;
> > bp->domain = AMDGPU_GEM_DOMAIN_VRAM;
> >- bp->flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
> >+ if (bp->size <= PAGE_SIZE && adev->asic_type == CHIP_RAVEN)
> >+ bp->domain |= AMDGPU_GEM_DOMAIN_GTT;
> >+ bp->domain = amdgpu_bo_get_preferred_pin_domain(adev, bp->domain);
> >+ bp->flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
> >+ AMDGPU_GEM_CREATE_CPU_GTT_USWC;
> > if (vm->use_cpu_for_update)
> > bp->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
> > else
>
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