+static int
+dpaa2_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+ int ret = -EINVAL;
+ struct dpaa2_dev_priv *priv;
+ struct fsl_mc_io *dpni;
+ struct dpni_link_state state = {0};
+
+ PMD_INIT_FUNC_TRACE();
+
+ priv = dev->data->dev_private;
+ dpni = (struct fsl_mc_io *)priv->hw;
+
+ if (dpni == NULL || fc_conf == NULL) {
+ RTE_LOG(ERR, PMD, "device not configured");
+ return ret;
+ }
+
+ ret = dpni_get_link_state(dpni, CMD_PRI_LOW, priv->token, &state);
+ if (ret) {
+ RTE_LOG(ERR, PMD, "error: dpni_get_link_state %d", ret);
+ return ret;
+ }
+
+ memset(fc_conf, 0, sizeof(struct rte_eth_fc_conf));
+ if (state.options & DPNI_LINK_OPT_PAUSE) {
+ /* DPNI_LINK_OPT_PAUSE set
+ * if ASYM_PAUSE not set,
+ * RX Side flow control (handle received Pause frame)
+ * TX side flow control (send Pause frame)
+ * if ASYM_PAUSE set,
+ * RX Side flow control (handle received Pause frame)
+ * No TX side flow control (send Pause frame disabled)
+ */
+ if (!(state.options & DPNI_LINK_OPT_ASYM_PAUSE))
+ fc_conf->mode = RTE_FC_FULL;
+ else
+ fc_conf->mode = RTE_FC_RX_PAUSE;
+ } else {
+ /* DPNI_LINK_OPT_PAUSE not set
+ * if ASYM_PAUSE set,
+ * TX side flow control (send Pause frame)
+ * No RX side flow control (No action on pause frame rx)
+ * if ASYM_PAUSE not set,
+ * Flow control disabled
+ */
+ if (state.options & DPNI_LINK_OPT_ASYM_PAUSE)
+ fc_conf->mode = RTE_FC_TX_PAUSE;
+ else
+ fc_conf->mode = RTE_FC_NONE;
+ }
+
+ return ret;
+}
+
+static int
+dpaa2_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+ int ret = -EINVAL;
+ struct dpaa2_dev_priv *priv;
+ struct fsl_mc_io *dpni;
+ struct dpni_link_state state = {0};
+ struct dpni_link_cfg cfg = {0};
+
+ PMD_INIT_FUNC_TRACE();
+
+ priv = dev->data->dev_private;
+ dpni = (struct fsl_mc_io *)priv->hw;
+
+ if (dpni == NULL) {
+ RTE_LOG(ERR, PMD, "dpni is NULL");
+ return ret;
+ }
+
+ /* It is necessary to obtain the current state before setting fc_conf
+ * as MC would return error in case rate, autoneg or duplex values are
+ * different.
+ */
+ ret = dpni_get_link_state(dpni, CMD_PRI_LOW, priv->token, &state);
+ if (ret) {
+ RTE_LOG(ERR, PMD, "Unable to get link state (err=%d)", ret);
+ return -1;
+ }
+
+ /* Disable link before setting configuration */
+ dpaa2_dev_set_link_down(dev);
+
+ /* Based on fc_conf, update cfg */
+ cfg.rate = state.rate;
+ cfg.options = state.options;
+
+ /* update cfg with fc_conf */
+ switch (fc_conf->mode) {
+ case RTE_FC_FULL:
+ /* Full flow control;
+ * OPT_PAUSE set, ASYM_PAUSE not set
+ */
+ cfg.options |= DPNI_LINK_OPT_PAUSE;
+ cfg.options &= ~DPNI_LINK_OPT_ASYM_PAUSE;
+ case RTE_FC_TX_PAUSE:
+ /* Enable RX flow control
+ * OPT_PAUSE not set;
+ * ASYM_PAUSE set;
+ */
+ cfg.options |= DPNI_LINK_OPT_ASYM_PAUSE;
+ cfg.options &= ~DPNI_LINK_OPT_PAUSE;
+ break;
+ case RTE_FC_RX_PAUSE:
+ /* Enable TX Flow control
+ * OPT_PAUSE set
+ * ASYM_PAUSE set
+ */
+ cfg.options |= DPNI_LINK_OPT_PAUSE;
+ cfg.options |= DPNI_LINK_OPT_ASYM_PAUSE;
+ break;
+ case RTE_FC_NONE:
+ /* Disable Flow control
+ * OPT_PAUSE not set
+ * ASYM_PAUSE not set
+ */
+ cfg.options &= ~DPNI_LINK_OPT_PAUSE;
+ cfg.options &= ~DPNI_LINK_OPT_ASYM_PAUSE;
+ break;
+ default:
+ RTE_LOG(ERR, PMD, "Incorrect Flow control flag (%d)",
+ fc_conf->mode);
+ return -1;
+ }
+
+ ret = dpni_set_link_cfg(dpni, CMD_PRI_LOW, priv->token, &cfg);
+ if (ret)
+ RTE_LOG(ERR, PMD, "Unable to set Link configuration (err=%d)",
+ ret);
+
+ /* Enable link */
+ dpaa2_dev_set_link_up(dev);
+
+ return ret;
+}
+