23 	dma_addr_t addr = pt ? px_dma(pt) : px_dma(ppgtt->base.vm.scratch[1]);  in gen6_write_pde()
79 	const gen6_pte_t scratch_pte = vm->scratch[0]->encode;  in gen6_ppgtt_clear_range()
100 		 * entries back to scratch.  in gen6_ppgtt_clear_range()
193 			fill32_px(pt, vm->scratch[0]->encode);  in gen6_alloc_va_range()
228 	vm->scratch[0]->encode =  in gen6_ppgtt_init_scratch()
229 		vm->pte_encode(px_dma(vm->scratch[0]),  in gen6_ppgtt_init_scratch()
232 	vm->scratch[1] = vm->alloc_pt_dma(vm, I915_GTT_PAGE_SIZE_4K);  in gen6_ppgtt_init_scratch()
233 	if (IS_ERR(vm->scratch[1])) {  in gen6_ppgtt_init_scratch()
234 		ret = PTR_ERR(vm->scratch[1]);  in gen6_ppgtt_init_scratch()
238 	ret = map_pt_dma(vm, vm->scratch[1]);  in gen6_ppgtt_init_scratch()
242 	fill32_px(vm->scratch[1], vm->scratch[0]->encode);  in gen6_ppgtt_init_scratch()
247 	i915_gem_object_put(vm->scratch[1]);  in gen6_ppgtt_init_scratch()
249 	i915_gem_object_put(vm->scratch[0]);  in gen6_ppgtt_init_scratch()
250 	vm->scratch[0] = NULL;  in gen6_ppgtt_init_scratch()