[Intel-xe] [PATCH 1/2] drm/xe: Set AE PTE bit if enabled on smem

[Lucas De Marchi]

On Fri, Jul 21, 2023 at 04:07:44PM +0200, Nirmoy Das wrote:
>Set AE PTE bit on smem if the platform is supported and
>enabled device scoped atomics on system memory by a
>user with madvise ioctl.
>
>Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
>---
> drivers/gpu/drm/xe/xe_pt.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
>diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c
>index 457f1363ec67..d43c91cf4776 100644
>--- a/drivers/gpu/drm/xe/xe_pt.c
>+++ b/drivers/gpu/drm/xe/xe_pt.c
>@@ -774,6 +774,10 @@ xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma,
> 		xe_walk.dma_offset = vram_region_gpu_offset(bo->ttm.resource);
> 		xe_walk.cache = XE_CACHE_WB;
> 	} else {
>+		if (tile_to_xe(tile)->info.platform != XE_PVC &&

why the platform check?

Lucas De Marchi

>+		    (vma && vma->gpuva.flags & XE_VMA_ATOMIC_PTE_BIT))
>+			xe_walk.default_pte |= XE_USM_PPGTT_PTE_AE;
>+
> 		if (!xe_vma_has_no_bo(vma) && bo->flags & XE_BO_SCANOUT_BIT)
> 			xe_walk.cache = XE_CACHE_WT;
> 		else
>-- 
>2.39.0
>