force_dma_api 267 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c MODULE_PARM_DESC(force_dma_api, "Force using the DMA API for TTM pages"); force_dma_api 268 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c module_param_named(force_dma_api, vmw_force_iommu, int, 0600);