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netvsc: add ethtool ops to get/set RSS key

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For some cases it is useful to be able to change RSS key value.
For example, replacing RSS key with a symmetric hash.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger
2017-01-24 13:06:02 -08:00
committed by David S. Miller
parent b5a5dc8dc8
commit 962f3fee83
3 changed files with 70 additions and 17 deletions
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46
drivers/net/hyperv/netvsc_drv.c
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@@ -1059,6 +1059,48 @@ static void netvsc_poll_controller(struct net_device *net)
}
#endif
static u32 netvsc_get_rxfh_key_size(struct net_device *dev)
{
return NETVSC_HASH_KEYLEN;
}
static u32 netvsc_rss_indir_size(struct net_device *dev)
{
return 0;
}
static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct net_device_context *ndc = netdev_priv(dev);
struct netvsc_device *ndev = ndc->nvdev;
struct rndis_device *rndis_dev = ndev->extension;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
if (key)
memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN);
return 0;
}
static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir,
const u8 *key, const u8 hfunc)
{
struct net_device_context *ndc = netdev_priv(dev);
struct netvsc_device *ndev = ndc->nvdev;
struct rndis_device *rndis_dev = ndev->extension;
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
if (!key || memcmp(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN) == 0)
return 0; /* no change */
return rndis_filter_set_rss_param(rndis_dev, key, ndev->num_chn);
}
static const struct ethtool_ops ethtool_ops = {
.get_drvinfo = netvsc_get_drvinfo,
.get_link = ethtool_op_get_link,
@@ -1071,6 +1113,10 @@ static const struct ethtool_ops ethtool_ops = {
.get_settings = netvsc_get_settings,
.set_settings = netvsc_set_settings,
.get_rxnfc = netvsc_get_rxnfc,
.get_rxfh_key_size = netvsc_get_rxfh_key_size,
.get_rxfh_indir_size = netvsc_rss_indir_size,
.get_rxfh = netvsc_get_rxfh,
.set_rxfh = netvsc_set_rxfh,
};
static const struct net_device_ops device_ops = {