Function ixgbe_start_timecounters

dpdk/drivers/net/ixgbe/ixgbe_ethdev.c:6972–7039

}

static void
ixgbe_start_timecounters(struct rte_eth_dev *dev)
{
	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
	struct ixgbe_adapter *adapter = dev->data->dev_private;
	struct rte_eth_link link;
	uint32_t incval = 0;
	uint32_t shift = 0;

	/* Get current link speed. */
	ixgbe_dev_link_update(dev, 1);
	rte_eth_linkstatus_get(dev, &link);

	switch (link.link_speed) {
	case RTE_ETH_SPEED_NUM_100M:
		incval = IXGBE_INCVAL_100;
		shift = IXGBE_INCVAL_SHIFT_100;
		break;
	case RTE_ETH_SPEED_NUM_1G:
		incval = IXGBE_INCVAL_1GB;
		shift = IXGBE_INCVAL_SHIFT_1GB;
		break;
	case RTE_ETH_SPEED_NUM_10G:
	default:
		incval = IXGBE_INCVAL_10GB;
		shift = IXGBE_INCVAL_SHIFT_10GB;
		break;
	}

	switch (hw->mac.type) {
	case ixgbe_mac_X550:
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		/* Independent of link speed. */
		incval = 1;
		/* Cycles read will be interpreted as ns. */
		shift = 0;
		/* Fall-through */
	case ixgbe_mac_X540:
		IXGBE_WRITE_REG(hw, IXGBE_TIMINCA, incval);
		break;
	case ixgbe_mac_82599EB:
		incval >>= IXGBE_INCVAL_SHIFT_82599;
		shift -= IXGBE_INCVAL_SHIFT_82599;
		IXGBE_WRITE_REG(hw, IXGBE_TIMINCA,
				(1 << IXGBE_INCPER_SHIFT_82599) | incval);
		break;
	default:
		/* Not supported. */
		return;
	}

	memset(&adapter->systime_tc, 0, sizeof(struct rte_timecounter));
	memset(&adapter->rx_tstamp_tc, 0, sizeof(struct rte_timecounter));
	memset(&adapter->tx_tstamp_tc, 0, sizeof(struct rte_timecounter));

	adapter->systime_tc.cc_mask = IXGBE_CYCLECOUNTER_MASK;
	adapter->systime_tc.cc_shift = shift;