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igc: allow configuring RSS key via ethtool set_rxfh

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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 <kohei@enjuk.jp>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Kohei Enju
2026-01-31 16:29:38 +00:00
committed by Tony Nguyen
parent f243be8ede
commit 3fc4c1ee5f
1 changed files with 17 additions and 13 deletions
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30
drivers/net/ethernet/intel/igc/igc_ethtool.c
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@@ -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;
}