C++ (Cpp) EITR_INTS_PER_SEC_TO_REGの例

コード例 #1

ファイル: ixgbe_ethtool.c プロジェクト: mecke/linux-2.6

static int ixgbe_set_coalesce(struct net_device *netdev,
                              struct ethtool_coalesce *ec)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	int i;

	if (ec->tx_max_coalesced_frames_irq)
		adapter->tx_ring[0].work_limit = ec->tx_max_coalesced_frames_irq;

	if (ec->rx_coalesce_usecs > 1) {
		/* check the limits */
		if ((1000000/ec->rx_coalesce_usecs > IXGBE_MAX_INT_RATE) ||
		    (1000000/ec->rx_coalesce_usecs < IXGBE_MIN_INT_RATE))
			return -EINVAL;

		/* store the value in ints/second */
		adapter->eitr_param = 1000000/ec->rx_coalesce_usecs;

		/* static value of interrupt rate */
		adapter->itr_setting = adapter->eitr_param;
		/* clear the lower bit as its used for dynamic state */
		adapter->itr_setting &= ~1;
	} else if (ec->rx_coalesce_usecs == 1) {
		/* 1 means dynamic mode */
		adapter->eitr_param = 20000;
		adapter->itr_setting = 1;
	} else {
		/*
		 * any other value means disable eitr, which is best
		 * served by setting the interrupt rate very high
		 */
		adapter->eitr_param = IXGBE_MAX_INT_RATE;
		adapter->itr_setting = 0;
	}

	for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
		struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
		if (q_vector->txr_count && !q_vector->rxr_count)
			/* tx vector gets half the rate */
			q_vector->eitr = (adapter->eitr_param >> 1);
		else
			/* rx only or mixed */
			q_vector->eitr = adapter->eitr_param;
		ixgbe_write_eitr(adapter, i,
		                 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
	}

コード例 #2

ファイル: ixgbe_ethtool.c プロジェクト: E-LLP/n900

static int ixgbe_set_coalesce(struct net_device *netdev,
                              struct ethtool_coalesce *ec)
{
	struct ixgbe_adapter *adapter = netdev_priv(netdev);
	struct ixgbe_hw *hw = &adapter->hw;
	int i;

	if (ec->tx_max_coalesced_frames_irq)
		adapter->tx_ring[0].work_limit = ec->tx_max_coalesced_frames_irq;

	if (ec->rx_coalesce_usecs > 1) {
		/* store the value in ints/second */
		adapter->eitr_param = 1000000/ec->rx_coalesce_usecs;

		/* static value of interrupt rate */
		adapter->itr_setting = adapter->eitr_param;
		/* clear the lower bit */
		adapter->itr_setting &= ~1;
	} else if (ec->rx_coalesce_usecs == 1) {
		/* 1 means dynamic mode */
		adapter->eitr_param = 20000;
		adapter->itr_setting = 1;
	} else {
		/* any other value means disable eitr, which is best
		 * served by setting the interrupt rate very high */
		adapter->eitr_param = 3000000;
		adapter->itr_setting = 0;
	}

	for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
		struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
		if (q_vector->txr_count && !q_vector->rxr_count)
			q_vector->eitr = (adapter->eitr_param >> 1);
		else
			/* rx only or mixed */
			q_vector->eitr = adapter->eitr_param;
		IXGBE_WRITE_REG(hw, IXGBE_EITR(i),
		                EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
	}