Commit a64b4421 authored by Ioana Ciornei's avatar Ioana Ciornei Committed by David S. Miller
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net: dpaa2: add support for manual setup of IRQ coalesing 



Use the newly exported dpio driver API to manually configure the IRQ
coalescing parameters requested by the user.
The .get_coalesce() and .set_coalesce() net_device callbacks are
implemented and directly export or setup the rx-usecs on all the
channels configured.

Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ed1d2143

drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c

+51 −0
Original line number Diff line number Diff line
@@ -820,7 +820,56 @@ static int dpaa2_eth_set_tunable(struct net_device *net_dev, 
	return err;

}



static int dpaa2_eth_get_coalesce(struct net_device *dev,

				  struct ethtool_coalesce *ic,

				  struct kernel_ethtool_coalesce *kernel_coal,

				  struct netlink_ext_ack *extack)

{

	struct dpaa2_eth_priv *priv = netdev_priv(dev);

	struct dpaa2_io *dpio = priv->channel[0]->dpio;



	dpaa2_io_get_irq_coalescing(dpio, &ic->rx_coalesce_usecs);



	return 0;

}



static int dpaa2_eth_set_coalesce(struct net_device *dev,

				  struct ethtool_coalesce *ic,

				  struct kernel_ethtool_coalesce *kernel_coal,

				  struct netlink_ext_ack *extack)

{

	struct dpaa2_eth_priv *priv = netdev_priv(dev);

	struct dpaa2_io *dpio;

	u32 prev_rx_usecs;

	int i, j, err;



	/* Keep track of the previous value, just in case we fail */

	dpio = priv->channel[0]->dpio;

	dpaa2_io_get_irq_coalescing(dpio, &prev_rx_usecs);



	/* Setup new value for rx coalescing */

	for (i = 0; i < priv->num_channels; i++) {

		dpio = priv->channel[i]->dpio;



		err = dpaa2_io_set_irq_coalescing(dpio, ic->rx_coalesce_usecs);

		if (err)

			goto restore_rx_usecs;

	}



	return 0;



restore_rx_usecs:

	for (j = 0; j < i; j++) {

		dpio = priv->channel[j]->dpio;



		dpaa2_io_set_irq_coalescing(dpio, prev_rx_usecs);

	}



	return err;

}



const struct ethtool_ops dpaa2_ethtool_ops = {

	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,

	.get_drvinfo = dpaa2_eth_get_drvinfo,

	.nway_reset = dpaa2_eth_nway_reset,

	.get_link = ethtool_op_get_link,
@@ -836,4 +885,6 @@ const struct ethtool_ops dpaa2_ethtool_ops = { 
	.get_ts_info = dpaa2_eth_get_ts_info,

	.get_tunable = dpaa2_eth_get_tunable,

	.set_tunable = dpaa2_eth_set_tunable,

	.get_coalesce = dpaa2_eth_get_coalesce,

	.set_coalesce = dpaa2_eth_set_coalesce,

};