To realize dGPU prime feature for virtio gpu, we are trying let dGPU import vram object of virtio gpu. But this feature would finally call function virtio_dma_buf_ops.device_attach(), which was set as drm_gem_map_attach(). drm_gem_map_attach() requires drm_gem_object_funcs.get_sg_table to be implemented, or else return ENOSYS. But virtio gpu driver has not implemented it for vram object and actually vram object does not require it. So this add a new implementation of device_attach() to call drm_gem_map_attach() for shmem object and return 0 for vram object as it actually did before the requirement was added. Julia Zhang (1): drm/virtio: Implement device_attach drivers/gpu/drm/virtio/virtgpu_prime.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) -- 2.34.1
