ionic: Add coalesce and other features

Interrupt coalescing, tunable copybreak value, and
tx timeout.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 108 insertions, 0 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 321b0543f2f8..7d10265f782a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -365,6 +365,78 @@ static int ionic_get_coalesce(struct net_device *netdev,
 	return 0;
 }
 
+static int ionic_set_coalesce(struct net_device *netdev,
+			      struct ethtool_coalesce *coalesce)
+{
+	struct ionic_lif *lif = netdev_priv(netdev);
+	struct ionic_identity *ident;
+	struct ionic_qcq *qcq;
+	unsigned int i;
+	u32 usecs;
+	u32 coal;
+
+	if (coalesce->rx_max_coalesced_frames ||
+	    coalesce->rx_coalesce_usecs_irq ||
+	    coalesce->rx_max_coalesced_frames_irq ||
+	    coalesce->tx_max_coalesced_frames ||
+	    coalesce->tx_coalesce_usecs_irq ||
+	    coalesce->tx_max_coalesced_frames_irq ||
+	    coalesce->stats_block_coalesce_usecs ||
+	    coalesce->use_adaptive_rx_coalesce ||
+	    coalesce->use_adaptive_tx_coalesce ||
+	    coalesce->pkt_rate_low ||
+	    coalesce->rx_coalesce_usecs_low ||
+	    coalesce->rx_max_coalesced_frames_low ||
+	    coalesce->tx_coalesce_usecs_low ||
+	    coalesce->tx_max_coalesced_frames_low ||
+	    coalesce->pkt_rate_high ||
+	    coalesce->rx_coalesce_usecs_high ||
+	    coalesce->rx_max_coalesced_frames_high ||
+	    coalesce->tx_coalesce_usecs_high ||
+	    coalesce->tx_max_coalesced_frames_high ||
+	    coalesce->rate_sample_interval)
+		return -EINVAL;
+
+	ident = &lif->ionic->ident;
+	if (ident->dev.intr_coal_div == 0) {
+		netdev_warn(netdev, "bad HW value in dev.intr_coal_div = %d\n",
+			    ident->dev.intr_coal_div);
+		return -EIO;
+	}
+
+	/* Tx uses Rx interrupt, so only change Rx */
+	if (coalesce->tx_coalesce_usecs != lif->rx_coalesce_usecs) {
+		netdev_warn(netdev, "only the rx-usecs can be changed\n");
+		return -EINVAL;
+	}
+
+	coal = ionic_coal_usec_to_hw(lif->ionic, coalesce->rx_coalesce_usecs);
+
+	if (coal > IONIC_INTR_CTRL_COAL_MAX)
+		return -ERANGE;
+
+	/* If they asked for non-zero and it resolved to zero, bump it up */
+	if (!coal && coalesce->rx_coalesce_usecs)
+		coal = 1;
+
+	/* Convert it back to get device resolution */
+	usecs = ionic_coal_hw_to_usec(lif->ionic, coal);
+
+	if (usecs != lif->rx_coalesce_usecs) {
+		lif->rx_coalesce_usecs = usecs;
+
+		if (test_bit(IONIC_LIF_UP, lif->state)) {
+			for (i = 0; i < lif->nxqs; i++) {
+				qcq = lif->rxqcqs[i].qcq;
+				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
+						     qcq->intr.index, coal);
+			}
+		}
+	}
+
+	return 0;
+}
+
 static void ionic_get_ringparam(struct net_device *netdev,
 				struct ethtool_ringparam *ring)
 {
@@ -550,6 +622,39 @@ static int ionic_set_rxfh(struct net_device *netdev, const u32 *indir,
 	return 0;
 }
 
+static int ionic_set_tunable(struct net_device *dev,
+			     const struct ethtool_tunable *tuna,
+			     const void *data)
+{
+	struct ionic_lif *lif = netdev_priv(dev);
+
+	switch (tuna->id) {
+	case ETHTOOL_RX_COPYBREAK:
+		lif->rx_copybreak = *(u32 *)data;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int ionic_get_tunable(struct net_device *netdev,
+			     const struct ethtool_tunable *tuna, void *data)
+{
+	struct ionic_lif *lif = netdev_priv(netdev);
+
+	switch (tuna->id) {
+	case ETHTOOL_RX_COPYBREAK:
+		*(u32 *)data = lif->rx_copybreak;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int ionic_get_module_info(struct net_device *netdev,
 				 struct ethtool_modinfo *modinfo)
 
@@ -643,6 +748,7 @@ static const struct ethtool_ops ionic_ethtool_ops = {
 	.get_link		= ethtool_op_get_link,
 	.get_link_ksettings	= ionic_get_link_ksettings,
 	.get_coalesce		= ionic_get_coalesce,
+	.set_coalesce		= ionic_set_coalesce,
 	.get_ringparam		= ionic_get_ringparam,
 	.set_ringparam		= ionic_set_ringparam,
 	.get_channels		= ionic_get_channels,
@@ -657,6 +763,8 @@ static const struct ethtool_ops ionic_ethtool_ops = {
 	.get_rxfh_key_size	= ionic_get_rxfh_key_size,
 	.get_rxfh		= ionic_get_rxfh,
 	.set_rxfh		= ionic_set_rxfh,
+	.get_tunable		= ionic_get_tunable,
+	.set_tunable		= ionic_set_tunable,
 	.get_module_info	= ionic_get_module_info,
 	.get_module_eeprom	= ionic_get_module_eeprom,
 	.get_pauseparam		= ionic_get_pauseparam,