ethdev: retrieve flow control configuration

[dpdk.git] / lib / librte_pmd_e1000 / igb_ethdev.c

diff --git a/lib/librte_pmd_e1000/igb_ethdev.c b/lib/librte_pmd_e1000/igb_ethdev.c
index ae7e03b..92ac4a8 100644 (file)
--- a/lib/librte_pmd_e1000/igb_ethdev.c
+++ b/lib/librte_pmd_e1000/igb_ethdev.c
@@ -72,6 +72,8 @@ static void eth_igb_stats_get(struct rte_eth_dev *dev,
 static void eth_igb_stats_reset(struct rte_eth_dev *dev);
 static void eth_igb_infos_get(struct rte_eth_dev *dev,
                                struct rte_eth_dev_info *dev_info);
+static int  eth_igb_flow_ctrl_get(struct rte_eth_dev *dev,
+                               struct rte_eth_fc_conf *fc_conf);
 static int  eth_igb_flow_ctrl_set(struct rte_eth_dev *dev,
                                struct rte_eth_fc_conf *fc_conf);
 static int eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev);
@@ -227,6 +229,7 @@ static struct eth_dev_ops eth_igb_ops = {
        .tx_queue_release     = eth_igb_tx_queue_release,
        .dev_led_on           = eth_igb_led_on,
        .dev_led_off          = eth_igb_led_off,
+       .flow_ctrl_get        = eth_igb_flow_ctrl_get,
        .flow_ctrl_set        = eth_igb_flow_ctrl_set,
        .mac_addr_add         = eth_igb_rar_set,
        .mac_addr_remove      = eth_igb_rar_clear,
@@ -1855,6 +1858,47 @@ eth_igb_led_off(struct rte_eth_dev *dev)
        return (e1000_led_off(hw) == E1000_SUCCESS ? 0 : -ENOTSUP);
 }
 
+static int
+eth_igb_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+       struct e1000_hw *hw;
+       uint32_t ctrl;
+       int tx_pause;
+       int rx_pause;
+
+       hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       fc_conf->pause_time = hw->fc.pause_time;
+       fc_conf->high_water = hw->fc.high_water;
+       fc_conf->low_water = hw->fc.low_water;
+       fc_conf->send_xon = hw->fc.send_xon;
+
+       /*
+        * Return rx_pause and tx_pause status according to actual setting of
+        * the TFCE and RFCE bits in the CTRL register.
+        */
+       ctrl = E1000_READ_REG(hw, E1000_CTRL);
+       if (ctrl & E1000_CTRL_TFCE)
+               tx_pause = 1;
+       else
+               tx_pause = 0;
+
+       if (ctrl & E1000_CTRL_RFCE)
+               rx_pause = 1;
+       else
+               rx_pause = 0;
+
+       if (rx_pause && tx_pause)
+               fc_conf->mode = RTE_FC_FULL;
+       else if (rx_pause)
+               fc_conf->mode = RTE_FC_RX_PAUSE;
+       else if (tx_pause)
+               fc_conf->mode = RTE_FC_TX_PAUSE;
+       else
+               fc_conf->mode = RTE_FC_NONE;
+
+       return 0;
+}
+
 static int
 eth_igb_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
 {