/* * Allocate a drm dma handle, allocate memory fit for DMA, and map it. * * XXX This is called drm_pci_alloc for hysterical raisins; it is not * specific to PCI. * * XXX For now, we use non-blocking allocations because this is called * by ioctls with the drm global mutex held. * * XXX Error information is lost because this returns NULL on failure, * not even an error embedded in a pointer. */