[PATCH net-next 03/11] igc: allow configuring RSS key via ethtool set_rxfh
From: Tony Nguyen <anthony.l.nguyen@intel.com>
Date: 2026-07-01 21:03:12
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Kohei Enju <redacted> Change igc_ethtool_set_rxfh() to accept and save a userspace-provided RSS key. When a key is provided, store it in the adapter and write the RSSRK registers accordingly. This can be tested using `ethtool -X <dev> hkey <key>`. Signed-off-by: Kohei Enju <redacted> Reviewed-by: Simon Horman <horms@kernel.org> Tested-by: Avigail Dahan <redacted> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 30 +++++++++++--------- 1 file changed, 17 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c
index 0e76ffe7be65..fbba3e84673a 100644
--- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
+++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c@@ -1539,24 +1539,28 @@ static int igc_ethtool_set_rxfh(struct net_device *netdev, int i; /* We do not allow change in unsupported parameters */ - if (rxfh->key || - (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE && - rxfh->hfunc != ETH_RSS_HASH_TOP)) + if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE && + rxfh->hfunc != ETH_RSS_HASH_TOP) return -EOPNOTSUPP; - if (!rxfh->indir) - return 0; - num_queues = adapter->rss_queues; + if (rxfh->indir) { + num_queues = adapter->rss_queues; - /* Verify user input. */ - for (i = 0; i < IGC_RETA_SIZE; i++) - if (rxfh->indir[i] >= num_queues) - return -EINVAL; + /* Verify user input. */ + for (i = 0; i < IGC_RETA_SIZE; i++) + if (rxfh->indir[i] >= num_queues) + return -EINVAL; - for (i = 0; i < IGC_RETA_SIZE; i++) - adapter->rss_indir_tbl[i] = rxfh->indir[i]; + for (i = 0; i < IGC_RETA_SIZE; i++) + adapter->rss_indir_tbl[i] = rxfh->indir[i]; - igc_write_rss_indir_tbl(adapter); + igc_write_rss_indir_tbl(adapter); + } + + if (rxfh->key) { + memcpy(adapter->rss_key, rxfh->key, sizeof(adapter->rss_key)); + igc_write_rss_key(adapter); + } return 0; }
--
2.47.1