From: Bas Nieuwenhuizen Date: Thu, 7 Sep 2017 13:23:21 +0200 Subject: drm/amdgpu: Account for shadow PTs in mapping update IB size. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Git-commit: 862095237c392887819e98018d6dc187d8c78726 Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 When amdgpu_vm_frag_ptes calls amdgpu_vm_update_ptes and the pt has a shadow PT we mirror all the write to the shadow PT too, which results in twice the commands. Signed-off-by: Bas Nieuwenhuizen Reviewed-by: Christian König Signed-off-by: Alex Deucher Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1536,10 +1536,12 @@ static int amdgpu_vm_bo_update_mapping(s nptes = last - start + 1; /* - * reserve space for one command every (1 << BLOCK_SIZE) + * reserve space for two commands every (1 << BLOCK_SIZE) * entries or 2k dwords (whatever is smaller) + * + * The second command is for the shadow pagetables. */ - ncmds = (nptes >> min(adev->vm_manager.block_size, 11u)) + 1; + ncmds = ((nptes >> min(adev->vm_manager.block_size, 11u)) + 1) * 2; /* padding, etc. */ ndw = 64;