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igc: expose RSS key via ethtool get_rxfh

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Implement igc_ethtool_get_rxfh_key_size() and extend
igc_ethtool_get_rxfh() to return the RSS key to userspace.

This can be tested using `ethtool -x <dev>`.

Signed-off-by: Kohei Enju <kohei@enjuk.jp>
Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
Reviewed-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Kohei Enju
2026-01-31 16:29:37 +00:00
committed by Tony Nguyen
parent 66731a51b1
commit f243be8ede
1 changed files with 13 additions and 4 deletions
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17
drivers/net/ethernet/intel/igc/igc_ethtool.c
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@@ -1502,6 +1502,11 @@ void igc_write_rss_indir_tbl(struct igc_adapter *adapter)
}
}
static u32 igc_ethtool_get_rxfh_key_size(struct net_device *netdev)
{
return IGC_RSS_KEY_SIZE;
}
static u32 igc_ethtool_get_rxfh_indir_size(struct net_device *netdev)
{
return IGC_RETA_SIZE;
@@ -1514,10 +1519,13 @@ static int igc_ethtool_get_rxfh(struct net_device *netdev,
int i;
rxfh->hfunc = ETH_RSS_HASH_TOP;
if (!rxfh->indir)
return 0;
for (i = 0; i < IGC_RETA_SIZE; i++)
rxfh->indir[i] = adapter->rss_indir_tbl[i];
if (rxfh->indir)
for (i = 0; i < IGC_RETA_SIZE; i++)
rxfh->indir[i] = adapter->rss_indir_tbl[i];
if (rxfh->key)
memcpy(rxfh->key, adapter->rss_key, sizeof(adapter->rss_key));
return 0;
}
@@ -2195,6 +2203,7 @@ static const struct ethtool_ops igc_ethtool_ops = {
.get_rxnfc = igc_ethtool_get_rxnfc,
.set_rxnfc = igc_ethtool_set_rxnfc,
.get_rx_ring_count = igc_ethtool_get_rx_ring_count,
.get_rxfh_key_size = igc_ethtool_get_rxfh_key_size,
.get_rxfh_indir_size = igc_ethtool_get_rxfh_indir_size,
.get_rxfh = igc_ethtool_get_rxfh,
.set_rxfh = igc_ethtool_set_rxfh,