+/**
+ * Toggle the DPNI to enable, if not already enabled.
+ * This is not strictly PHY up/down - it is more of logical toggling.
+ */
+static int
+dpaa2_dev_set_link_up(struct rte_eth_dev *dev)
+{
+ int ret = -EINVAL;
+ struct dpaa2_dev_priv *priv;
+ struct fsl_mc_io *dpni;
+ int en = 0;
+
+ PMD_INIT_FUNC_TRACE();
+
+ priv = dev->data->dev_private;
+ dpni = (struct fsl_mc_io *)priv->hw;
+
+ if (dpni == NULL) {
+ RTE_LOG(ERR, PMD, "Device has not yet been configured");
+ return ret;
+ }
+
+ /* Check if DPNI is currently enabled */
+ ret = dpni_is_enabled(dpni, CMD_PRI_LOW, priv->token, &en);
+ if (ret) {
+ /* Unable to obtain dpni status; Not continuing */
+ PMD_DRV_LOG(ERR, "Interface Link UP failed (%d)", ret);
+ return -EINVAL;
+ }
+
+ /* Enable link if not already enabled */
+ if (!en) {
+ ret = dpni_enable(dpni, CMD_PRI_LOW, priv->token);
+ if (ret) {
+ PMD_DRV_LOG(ERR, "Interface Link UP failed (%d)", ret);
+ return -EINVAL;
+ }
+ }
+ /* changing tx burst function to start enqueues */
+ dev->tx_pkt_burst = dpaa2_dev_tx;
+ dev->data->dev_link.link_status = 1;
+
+ PMD_DRV_LOG(INFO, "Port %d Link UP successful", dev->data->port_id);
+ return ret;
+}
+
+/**
+ * Toggle the DPNI to disable, if not already disabled.
+ * This is not strictly PHY up/down - it is more of logical toggling.
+ */
+static int
+dpaa2_dev_set_link_down(struct rte_eth_dev *dev)
+{
+ int ret = -EINVAL;
+ struct dpaa2_dev_priv *priv;
+ struct fsl_mc_io *dpni;
+ int dpni_enabled = 0;
+ int retries = 10;
+
+ PMD_INIT_FUNC_TRACE();
+
+ priv = dev->data->dev_private;
+ dpni = (struct fsl_mc_io *)priv->hw;
+
+ if (dpni == NULL) {
+ RTE_LOG(ERR, PMD, "Device has not yet been configured");
+ return ret;
+ }
+
+ /*changing tx burst function to avoid any more enqueues */
+ dev->tx_pkt_burst = dummy_dev_tx;
+
+ /* Loop while dpni_disable() attempts to drain the egress FQs
+ * and confirm them back to us.
+ */
+ do {
+ ret = dpni_disable(dpni, 0, priv->token);
+ if (ret) {
+ PMD_DRV_LOG(ERR, "dpni disable failed (%d)", ret);
+ return ret;
+ }
+ ret = dpni_is_enabled(dpni, 0, priv->token, &dpni_enabled);
+ if (ret) {
+ PMD_DRV_LOG(ERR, "dpni_is_enabled failed (%d)", ret);
+ return ret;
+ }
+ if (dpni_enabled)
+ /* Allow the MC some slack */
+ rte_delay_us(100 * 1000);
+ } while (dpni_enabled && --retries);
+
+ if (!retries) {
+ PMD_DRV_LOG(WARNING, "Retry count exceeded disabling DPNI\n");
+ /* todo- we may have to manually cleanup queues.
+ */
+ } else {
+ PMD_DRV_LOG(INFO, "Port %d Link DOWN successful",
+ dev->data->port_id);
+ }
+
+ dev->data->dev_link.link_status = 0;
+
+ return ret;
+}
+