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Commit 4c696ca9 authored by Alexander Duyck's avatar Alexander Duyck Committed by Jeff Kirsher
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ixgbe: Add support for set_channels ethtool operation 



This change adds support for the ethtool set_channels operation.

Since the ixgbe driver has to support DCB as well as the other modes the
assumption I made here is that the number of channels in DCB modes refers
to the number of queues per traffic class, not the number of queues total.

CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Tested-by: default avatarPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 5348c9db

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

+38 −0
Original line number Diff line number Diff line
@@ -2802,6 +2802,43 @@ static void ixgbe_get_channels(struct net_device *dev, 
	ch->combined_count = adapter->ring_feature[RING_F_FDIR].indices;

}



static int ixgbe_set_channels(struct net_device *dev,

			      struct ethtool_channels *ch)

{

	struct ixgbe_adapter *adapter = netdev_priv(dev);

	unsigned int count = ch->combined_count;



	/* verify they are not requesting separate vectors */

	if (!count || ch->rx_count || ch->tx_count)

		return -EINVAL;



	/* verify other_count has not changed */

	if (ch->other_count != NON_Q_VECTORS)

		return -EINVAL;



	/* verify the number of channels does not exceed hardware limits */

	if (count > ixgbe_max_channels(adapter))

		return -EINVAL;



	/* update feature limits from largest to smallest supported values */

	adapter->ring_feature[RING_F_FDIR].limit = count;



	/* cap RSS limit at 16 */

	if (count > IXGBE_MAX_RSS_INDICES)

		count = IXGBE_MAX_RSS_INDICES;

	adapter->ring_feature[RING_F_RSS].limit = count;



#ifdef IXGBE_FCOE

	/* cap FCoE limit at 8 */

	if (count > IXGBE_FCRETA_SIZE)

		count = IXGBE_FCRETA_SIZE;

	adapter->ring_feature[RING_F_FCOE].limit = count;



#endif

	/* use setup TC to update any traffic class queue mapping */

	return ixgbe_setup_tc(dev, netdev_get_num_tc(dev));

}



static const struct ethtool_ops ixgbe_ethtool_ops = {

	.get_settings           = ixgbe_get_settings,

	.set_settings           = ixgbe_set_settings,
@@ -2831,6 +2868,7 @@ static const struct ethtool_ops ixgbe_ethtool_ops = { 
	.get_rxnfc		= ixgbe_get_rxnfc,

	.set_rxnfc		= ixgbe_set_rxnfc,

	.get_channels		= ixgbe_get_channels,

	.set_channels		= ixgbe_set_channels,

	.get_ts_info		= ixgbe_get_ts_info,

};