driver-api/virtio/writing_virtio_drivers.rst

1 .. SPDX-License-Identifier: GPL-2.0
39 		struct virtio_dummy_dev *dev = vq->vdev->priv;
43 		while ((buf = virtqueue_get_buf(dev->vq, &len)) != NULL) {
55 			return -ENOMEM;
58 		dev->vq = virtio_find_single_vq(vdev, virtio_dummy_recv_cb, "input");
59 		if (IS_ERR(dev->vq)) {
61 			return PTR_ERR(dev->vq);
64 		vdev->priv = dev;
74 		struct virtio_dummy_dev *dev = vdev->priv;
78 		 * vdev->config->reset(vdev)
83 		while ((buf = virtqueue_detach_unused_buf(dev->vq)) != NULL) {
88 		vdev->config->del_vqs(vdev);
126 .. kernel-doc:: include/linux/virtio_config.h
138 that's only the second half of the virtio device-driver communication
143 have to add the buffers -- packed as `scatterlists` -- to the
154 	virtqueue_add_inbuf(dev->vq, sg, 1, buffer, GFP_ATOMIC);
155 	virtqueue_kick(dev->vq);
157 .. kernel-doc:: drivers/virtio/virtio_ring.c
160 .. kernel-doc:: drivers/virtio/virtio_ring.c
163 .. kernel-doc:: drivers/virtio/virtio_ring.c
172 .. kernel-doc:: drivers/virtio/virtio_ring.c
175 The virtqueue callbacks can be disabled and re-enabled using the
179 .. kernel-doc:: drivers/virtio/virtio_ring.c
182 .. kernel-doc:: drivers/virtio/virtio_ring.c
194 https://docs.oasis-open.org/virtio/virtio/v1.2/virtio-v1.2.html