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Commit b00fabb4 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
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netdev: ethtool RXHASH flag 



This adds ethtool and device feature flag to allow control
of receive hashing offload.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Acked-by: default avatarJeff Garzik <jgarzik@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 757b77e2

include/linux/ethtool.h

+1 −0
Original line number Diff line number Diff line
@@ -310,6 +310,7 @@ struct ethtool_perm_addr { 
enum ethtool_flags {

	ETH_FLAG_LRO		= (1 << 15),	/* LRO is enabled */

	ETH_FLAG_NTUPLE		= (1 << 27),	/* N-tuple filters enabled */

	ETH_FLAG_RXHASH		= (1 << 28),

};



/* The following structures are for supporting RX network flow

include/linux/netdevice.h

+1 −0
Original line number Diff line number Diff line
@@ -785,6 +785,7 @@ struct net_device { 
#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */

#define NETIF_F_FCOE_MTU	(1 << 26) /* Supports max FCoE MTU, 2158 bytes*/

#define NETIF_F_NTUPLE		(1 << 27) /* N-tuple filters supported */

#define NETIF_F_RXHASH		(1 << 28) /* Receive hashing offload */



	/* Segmentation offload features */

#define NETIF_F_GSO_SHIFT	16

net/core/ethtool.c

+6 −1
Original line number Diff line number Diff line
@@ -121,7 +121,7 @@ int ethtool_op_set_ufo(struct net_device *dev, u32 data) 
 * NETIF_F_xxx values in include/linux/netdevice.h

 */

static const u32 flags_dup_features =

	(ETH_FLAG_LRO | ETH_FLAG_NTUPLE);

	(ETH_FLAG_LRO | ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH);



u32 ethtool_op_get_flags(struct net_device *dev)

{
@@ -152,6 +152,11 @@ int ethtool_op_set_flags(struct net_device *dev, u32 data) 
		features &= ~NETIF_F_NTUPLE;

	}



	if (data & ETH_FLAG_RXHASH)

		features |= NETIF_F_RXHASH;

	else

		features &= ~NETIF_F_RXHASH;



	dev->features = features;

	return 0;

}