The patch introduces the virtio implementation for setting up the
receive queue.
Signed-off-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
Signed-off-by: Razvan Cojocaru <razvan.cojocaru93@xxxxxxxxx>
---
plat/drivers/virtio/virtio_net.c | 145 +++++++++++++++++++++++++++++++++++++--
1 file changed, 140 insertions(+), 5 deletions(-)
diff --git a/plat/drivers/virtio/virtio_net.c b/plat/drivers/virtio/virtio_net.c
index 4edb34b..3b1631f 100644
--- a/plat/drivers/virtio/virtio_net.c
+++ b/plat/drivers/virtio/virtio_net.c
@@ -168,6 +168,10 @@ static struct uk_netdev_tx_queue
*virtio_netdev_tx_queue_setup(
struct uk_netdev *n, uint16_t queue_id,
uint16_t nb_desc,
struct uk_netdev_txqueue_conf *conf);
+static int virtio_netdev_vqueue_setup(struct virtio_net_device *vndev,
+ uint16_t queue_id, uint16_t nr_desc,
+ virtq_type_t queue_type,
+ struct uk_alloc *a);
static struct uk_netdev_rx_queue *virtio_netdev_rx_queue_setup(
struct uk_netdev *n,
uint16_t queue_id, uint16_t nb_desc,
@@ -191,6 +195,7 @@ static int virtio_netdev_rxq_info_get(struct uk_netdev
*dev, __u16 queue_id,
struct uk_netdev_queue_info *qinfo);
static int virtio_netdev_txq_info_get(struct uk_netdev *dev, __u16 queue_id,
struct uk_netdev_queue_info *qinfo);
+static int virtio_netdev_recv_done(struct virtqueue *vq, void *priv);
/**
* Static global constants
@@ -201,6 +206,23 @@ static struct uk_alloc *a;
/**
* The Driver method implementation.
*/
+static int virtio_netdev_recv_done(struct virtqueue *vq, void *priv)
+{
+ struct uk_netdev_rx_queue *rxq = NULL;
+
+ UK_ASSERT(vq && priv);
+
+ rxq = (struct uk_netdev_rx_queue *) priv;
+
+ /* Disable the interrupt for the ring */
+ virtqueue_intr_disable(vq);
+ rxq->intr_enabled &= ~(VTNET_INTR_EN);
+
+ /* Indicate to the network stack about an event */
+ uk_netdev_drv_rx_event(rxq->ndev, rxq->lqueue_id);
+ return 1;
+}
+
static int virtio_netdev_xmit(struct uk_netdev *dev,
struct uk_netdev_tx_queue *queue,
struct uk_netbuf *pkt)
@@ -228,15 +250,111 @@ static int virtio_netdev_recv(struct uk_netdev *dev
__unused,
}
static struct uk_netdev_rx_queue *virtio_netdev_rx_queue_setup(
- struct uk_netdev *n, uint16_t queue_id __unused,
- uint16_t nb_desc __unused,
- struct uk_netdev_rxqueue_conf *conf __unused)
+ struct uk_netdev *n, uint16_t queue_id,
+ uint16_t nb_desc,
+ struct uk_netdev_rxqueue_conf *conf)
{
+ struct virtio_net_device *vndev;
struct uk_netdev_rx_queue *rxq = NULL;
+ int rc;
UK_ASSERT(n);
+ UK_ASSERT(conf);
+ vndev = to_virtionetdev(n);
+ if (queue_id >= vndev->max_vqueue_pairs) {
+ uk_pr_err("Invalid virtqueue identifier: %"__PRIu16"\n",
+ queue_id);
+ rc = -EINVAL;
+ goto err_exit;
+ }
+ /* Setup the virtqueue with the descriptor */
+ rc = virtio_netdev_vqueue_setup(vndev, queue_id, nb_desc, VNET_RX,
+ conf->a);
+ if (rc < 0) {
+ uk_pr_err("Failed to set up virtqueue %"__PRIu16": %d\n",
+ queue_id, rc);
+ goto err_exit;
+ }
+ rxq = &vndev->rxqs[rc];
+exit:
return rxq;
+
+err_exit:
+ rxq = ERR2PTR(rc);
+ goto exit;
+}
+
+/**
+ * This function setup the vring infrastructure.
+ * @param vndev
+ * Reference to the virtio net device.
+ * @param queue_id
+ * User queue identifier
+ * @param nr_desc
+ * User configured number of descriptors.
+ * @param queue_type
+ * Queue type.
+ * @param a
+ * Reference to the allocator.
+ */
+static int virtio_netdev_vqueue_setup(struct virtio_net_device *vndev,
+ uint16_t queue_id, uint16_t nr_desc, virtq_type_t queue_type,
+ struct uk_alloc *a)
+{
+ int rc = 0;
+ int id = 0;
+ virtqueue_callback_t callback;
+ uint16_t max_desc, hwvq_id;
+ struct virtqueue *vq;
+
+ if (queue_type == VNET_RX) {
+ id = vndev->rx_vqueue_cnt;
+ callback = virtio_netdev_recv_done;
+ max_desc = vndev->rxqs[id].max_nb_desc;
+ hwvq_id = vndev->rxqs[id].hwvq_id;
+ } else {
+ id = vndev->tx_vqueue_cnt;
+ /* We don't support the callback from the txqueue yet */
+ callback = NULL;
+ max_desc = vndev->txqs[id].max_nb_desc;
+ hwvq_id = vndev->txqs[id].hwvq_id;
+ }
+
+ if (unlikely(max_desc < nr_desc)) {
+ uk_pr_err("Max allowed desc: %"__PRIu16" Requested
desc:%"__PRIu16"\n",
+ max_desc, nr_desc);
+ return -ENOBUFS;
+ }
+
+ /* Check if the descriptor is a power of 2 */
+ if (unlikely(nr_desc & (nr_desc - 1))) {
+ uk_pr_err("Expect descriptor count as a power 2\n");
+ return -EINVAL;
+ }
+ vq = virtio_vqueue_setup(vndev->vdev, hwvq_id, nr_desc, callback, a);
+ if (unlikely(PTRISERR(vq))) {
+ uk_pr_err("Failed to set up virtqueue %"__PRIu16"\n",
+ queue_id);
+ rc = PTR2ERR(vq);
+ return rc;
+ }
+
+ if (queue_type == VNET_RX) {
+ vq->priv = &vndev->rxqs[id];
+ vndev->rxqs[id].ndev = &vndev->netdev;
+ vndev->rxqs[id].vq = vq;
+ vndev->rxqs[id].nb_desc = nr_desc;
+ vndev->rxqs[id].lqueue_id = queue_id;
+ vndev->rx_vqueue_cnt++;
+ } else {
+ vndev->txqs[id].vq = vq;
+ vndev->rxqs[id].ndev = &vndev->netdev;
+ vndev->txqs[id].nb_desc = nr_desc;
+ vndev->txqs[id].lqueue_id = queue_id;
+ vndev->tx_vqueue_cnt++;
+ }
+ return id;
}
static struct uk_netdev_tx_queue *virtio_netdev_tx_queue_setup(
@@ -251,12 +369,29 @@ static struct uk_netdev_tx_queue
*virtio_netdev_tx_queue_setup(
}
static int virtio_netdev_rxq_info_get(struct uk_netdev *dev,
- __u16 queue_id __unused,
+ __u16 queue_id,
struct uk_netdev_queue_info *qinfo)
{
+ struct virtio_net_device *vndev;
+ struct uk_netdev_rx_queue *rxq;
+ int rc = 0;
+
UK_ASSERT(dev);
UK_ASSERT(qinfo);
- return 0;
+ vndev = to_virtionetdev(dev);
+ if (unlikely(queue_id >= vndev->max_vqueue_pairs)) {
+ uk_pr_err("Invalid virtqueue id: %"__PRIu16"\n", queue_id);
+ rc = -EINVAL;
+ goto exit;
+ }
+ rxq = &vndev->rxqs[queue_id];
+ qinfo->nb_min = 1;
+ qinfo->nb_max = rxq->max_nb_desc;
+ qinfo->nb_is_power_of_two = 1;
+
+exit:
+ return rc;
+
}
static int virtio_netdev_txq_info_get(struct uk_netdev *dev,
