Commit fcc2df8b authored by Julian Wiedmann's avatar Julian Wiedmann Committed by David S. Miller
Browse files

s390/qeth: allow configuration of TX queues for z/VM NICs 



Add support for ETHTOOL_SCHANNELS to change the count of active
TX queues.

Since all TX queue structs are pre-allocated and -registered, we just
need to trivially adjust dev->real_num_tx_queues.

Signed-off-by: default avatarJulian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1c103cf8

drivers/s390/net/qeth_ethtool.c

+17 −0
Original line number Diff line number Diff line
@@ -175,6 +175,22 @@ static void qeth_get_channels(struct net_device *dev, 
	channels->combined_count = 0;

}



static int qeth_set_channels(struct net_device *dev,

			     struct ethtool_channels *channels)

{

	struct qeth_card *card = dev->ml_priv;



	if (IS_IQD(card) || !IS_VM_NIC(card))

		return -EOPNOTSUPP;



	if (channels->rx_count == 0 || channels->tx_count == 0)

		return -EINVAL;

	if (channels->tx_count > card->qdio.no_out_queues)

		return -EINVAL;



	return netif_set_real_num_tx_queues(dev, channels->tx_count);

}



static int qeth_get_tunable(struct net_device *dev,

			    const struct ethtool_tunable *tuna, void *data)

{
@@ -410,6 +426,7 @@ const struct ethtool_ops qeth_ethtool_ops = { 
	.get_sset_count = qeth_get_sset_count,

	.get_drvinfo = qeth_get_drvinfo,

	.get_channels = qeth_get_channels,

	.set_channels = qeth_set_channels,

	.get_tunable = qeth_get_tunable,

	.set_tunable = qeth_set_tunable,

	.get_link_ksettings = qeth_get_link_ksettings,