Commit 8ed3cefc authored by Ioana Ciornei's avatar Ioana Ciornei Committed by David S. Miller
Browse files

dpaa2-eth: export the rx copybreak value as an ethtool tunable 



It's useful, especially for debugging purposes, to have the Rx copybreak
value changeable at runtime. Export it as an ethtool tunable.

Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 50f82699

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

+5 −2
Original line number Diff line number Diff line
@@ -423,11 +423,12 @@ static struct sk_buff *dpaa2_eth_copybreak(struct dpaa2_eth_channel *ch, 
					   void *fd_vaddr)

{

	u16 fd_offset = dpaa2_fd_get_offset(fd);

	struct dpaa2_eth_priv *priv = ch->priv;

	u32 fd_length = dpaa2_fd_get_len(fd);

	struct sk_buff *skb = NULL;

	unsigned int skb_len;



	if (fd_length > DPAA2_ETH_DEFAULT_COPYBREAK)

	if (fd_length > priv->rx_copybreak)

		return NULL;



	skb_len = fd_length + dpaa2_eth_needed_headroom(NULL);
@@ -441,7 +442,7 @@ static struct sk_buff *dpaa2_eth_copybreak(struct dpaa2_eth_channel *ch, 


	memcpy(skb->data, fd_vaddr + fd_offset, fd_length);



	dpaa2_eth_recycle_buf(ch->priv, ch, dpaa2_fd_get_addr(fd));

	dpaa2_eth_recycle_buf(priv, ch, dpaa2_fd_get_addr(fd));



	return skb;

}
@@ -4333,6 +4334,8 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev) 


	skb_queue_head_init(&priv->tx_skbs);



	priv->rx_copybreak = DPAA2_ETH_DEFAULT_COPYBREAK;



	/* Obtain a MC portal */

	err = fsl_mc_portal_allocate(dpni_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,

				     &priv->mc_io);

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h

+2 −0
Original line number Diff line number Diff line
@@ -571,6 +571,8 @@ struct dpaa2_eth_priv { 
	struct devlink *devlink;

	struct dpaa2_eth_trap_data *trap_data;

	struct devlink_port devlink_port;



	u32 rx_copybreak;

};



struct dpaa2_eth_devlink_priv {

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

+40 −0
Original line number Diff line number Diff line
@@ -782,6 +782,44 @@ static int dpaa2_eth_get_ts_info(struct net_device *dev, 
	return 0;

}



static int dpaa2_eth_get_tunable(struct net_device *net_dev,

				 const struct ethtool_tunable *tuna,

				 void *data)

{

	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);

	int err = 0;



	switch (tuna->id) {

	case ETHTOOL_RX_COPYBREAK:

		*(u32 *)data = priv->rx_copybreak;

		break;

	default:

		err = -EOPNOTSUPP;

		break;

	}



	return err;

}



static int dpaa2_eth_set_tunable(struct net_device *net_dev,

				 const struct ethtool_tunable *tuna,

				 const void *data)

{

	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);

	int err = 0;



	switch (tuna->id) {

	case ETHTOOL_RX_COPYBREAK:

		priv->rx_copybreak = *(u32 *)data;

		break;

	default:

		err = -EOPNOTSUPP;

		break;

	}



	return err;

}



const struct ethtool_ops dpaa2_ethtool_ops = {

	.get_drvinfo = dpaa2_eth_get_drvinfo,

	.nway_reset = dpaa2_eth_nway_reset,
@@ -796,4 +834,6 @@ const struct ethtool_ops dpaa2_ethtool_ops = { 
	.get_rxnfc = dpaa2_eth_get_rxnfc,

	.set_rxnfc = dpaa2_eth_set_rxnfc,

	.get_ts_info = dpaa2_eth_get_ts_info,

	.get_tunable = dpaa2_eth_get_tunable,

	.set_tunable = dpaa2_eth_set_tunable,

};