+
+ /*
+ * check if we want to change flow control mode - driver doesn't have native
+ * capability to do that, so we'll write the registers ourselves
+ */
+ ctrl = E1000_READ_REG(hw, E1000_CTRL);
+
+ /*
+ * set or clear E1000_CTRL_RFCE and E1000_CTRL_TFCE bits depending
+ * on configuration
+ */
+ switch (fc_conf->mode) {
+ case RTE_FC_NONE:
+ ctrl &= ~E1000_CTRL_RFCE & ~E1000_CTRL_TFCE;
+ break;
+ case RTE_FC_RX_PAUSE:
+ ctrl |= E1000_CTRL_RFCE;
+ ctrl &= ~E1000_CTRL_TFCE;
+ break;
+ case RTE_FC_TX_PAUSE:
+ ctrl |= E1000_CTRL_TFCE;
+ ctrl &= ~E1000_CTRL_RFCE;
+ break;
+ case RTE_FC_FULL:
+ ctrl |= E1000_CTRL_RFCE | E1000_CTRL_TFCE;
+ break;
+ default:
+ PMD_INIT_LOG(ERR, "invalid flow control mode");
+ return -EINVAL;
+ }
+
+ E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
+