/**
* i40evf_set_itr_per_queue - set ITR values for specific queue
* @adapter: the VF adapter struct to set values for
* @ec: coalesce settings from ethtool
* @queue: the queue to modify
*
* Change the ITR settings for a specific queue.
**/
static void i40evf_set_itr_per_queue(struct i40evf_adapter *adapter,
struct ethtool_coalesce *ec,
int queue)
{
struct i40e_ring *rx_ring = &adapter->rx_rings[queue];
struct i40e_ring *tx_ring = &adapter->tx_rings[queue];
struct i40e_q_vector *q_vector;
rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs);
tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs);
rx_ring->itr_setting |= I40E_ITR_DYNAMIC;
if (!ec->use_adaptive_rx_coalesce)
rx_ring->itr_setting ^= I40E_ITR_DYNAMIC;
tx_ring->itr_setting |= I40E_ITR_DYNAMIC;
if (!ec->use_adaptive_tx_coalesce)
tx_ring->itr_setting ^= I40E_ITR_DYNAMIC;
q_vector = rx_ring->q_vector;
q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
q_vector = tx_ring->q_vector;
q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
/* The interrupt handler itself will take care of programming
* the Tx and Rx ITR values based on the values we have entered
* into the q_vector, no need to write the values now.
*/
}
static int i40e_set_coalesce(struct net_device *netdev,
struct ethtool_coalesce *ec)
{
struct i40e_netdev_priv *np = netdev_priv(netdev);
struct i40e_q_vector *q_vector;
struct i40e_vsi *vsi = np->vsi;
struct i40e_pf *pf = vsi->back;
struct i40e_hw *hw = &pf->hw;
u16 vector;
int i;
if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
vsi->work_limit = ec->tx_max_coalesced_frames_irq;
switch (ec->rx_coalesce_usecs) {
case 0:
vsi->rx_itr_setting = 0;
break;
case 1:
vsi->rx_itr_setting = (I40E_ITR_DYNAMIC |
ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
break;
default:
if ((ec->rx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
(ec->rx_coalesce_usecs > (I40E_MAX_ITR << 1)))
return -EINVAL;
vsi->rx_itr_setting = ec->rx_coalesce_usecs;
break;
}
switch (ec->tx_coalesce_usecs) {
case 0:
vsi->tx_itr_setting = 0;
break;
case 1:
vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
break;
default:
if ((ec->tx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
(ec->tx_coalesce_usecs > (I40E_MAX_ITR << 1)))
return -EINVAL;
vsi->tx_itr_setting = ec->tx_coalesce_usecs;
break;
}
vector = vsi->base_vector;
for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
q_vector = vsi->q_vectors[i];
q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
wr32(hw, I40E_PFINT_ITRN(0, vector - 1), q_vector->rx.itr);
q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
wr32(hw, I40E_PFINT_ITRN(1, vector - 1), q_vector->tx.itr);
i40e_flush(hw);
}
return 0;
}
/**
* i40evf_set_coalesce - Set interrupt coalescing settings
* @netdev: network interface device structure
* @ec: ethtool coalesce structure
*
* Change current coalescing settings.
**/
static int i40evf_set_coalesce(struct net_device *netdev,
struct ethtool_coalesce *ec)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40e_hw *hw = &adapter->hw;
struct i40e_vsi *vsi = &adapter->vsi;
struct i40e_q_vector *q_vector;
int i;
if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
vsi->work_limit = ec->tx_max_coalesced_frames_irq;
if ((ec->rx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
(ec->rx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
vsi->rx_itr_setting = ec->rx_coalesce_usecs;
else
return -EINVAL;
if ((ec->tx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
(ec->tx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
vsi->tx_itr_setting = ec->tx_coalesce_usecs;
else if (ec->use_adaptive_tx_coalesce)
vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
else
return -EINVAL;
if (ec->use_adaptive_rx_coalesce)
vsi->rx_itr_setting |= I40E_ITR_DYNAMIC;
else
vsi->rx_itr_setting &= ~I40E_ITR_DYNAMIC;
if (ec->use_adaptive_tx_coalesce)
vsi->tx_itr_setting |= I40E_ITR_DYNAMIC;
else
vsi->tx_itr_setting &= ~I40E_ITR_DYNAMIC;
for (i = 0; i < adapter->num_msix_vectors - NONQ_VECS; i++) {
q_vector = &adapter->q_vectors[i];
q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
wr32(hw, I40E_VFINT_ITRN1(0, i), q_vector->rx.itr);
q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
wr32(hw, I40E_VFINT_ITRN1(1, i), q_vector->tx.itr);
i40e_flush(hw);
}
return 0;
}
