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netdev: ethtool RXHASH flag

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

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2010-03-29 14:47:27 +00:00 committed by David S. Miller
parent 757b77e2b2
commit b00fabb402
3 changed files with 8 additions and 1 deletions
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1
include/linux/ethtool.h
View file

@ -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

1
include/linux/netdevice.h
View file

@ -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

7
net/core/ethtool.c
View file

@ -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;
}