From: Oak Zeng <Oak.Zeng@xxxxxxx> For A+A configuration, device memory is supposed to be mapped as cachable from CPU side. For kernel pre-map gpu device memory using ioremap_cache Signed-off-by: Oak Zeng <Oak.Zeng@xxxxxxx> Reviewed-by: Christian Koenig <Christian.Koenig@xxxxxxx> Tested-by: Amber Lin <Amber.Lin@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 441799f0da05..95d9ed411520 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1917,8 +1917,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) /* Change the size here instead of the init above so only lpfn is affected */ amdgpu_ttm_set_buffer_funcs_status(adev, false); #ifdef CONFIG_64BIT - adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base, - adev->gmc.visible_vram_size); + if (adev->gmc.xgmi.connected_to_cpu) + adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base, + adev->gmc.visible_vram_size); + + else + adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base, + adev->gmc.visible_vram_size); #endif /* -- 2.29.2 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
