From: Joe Damato jdamato@fastly.com
[ Upstream commit 4f3ed1293feb9502dc254b05802faf1ad3317ac6 ]
ixgbe currently returns `EINVAL` whenever the flowhash it set by ethtool because the ethtool code in the kernel passes a non-zero value for hfunc that ixgbe should allow.
When ethtool is called with `ETHTOOL_SRXFHINDIR`, `ethtool_set_rxfh_indir` will call ixgbe's set_rxfh function with `ETH_RSS_HASH_NO_CHANGE`. This value should be accepted.
When ethtool is called with `ETHTOOL_SRSSH`, `ethtool_set_rxfh` will call ixgbe's set_rxfh function with `rxfh.hfunc`, which appears to be hardcoded in ixgbe to always be `ETH_RSS_HASH_TOP`. This value should also be accepted.
Before this patch:
$ sudo ethtool -L eth1 combined 10 $ sudo ethtool -X eth1 default Cannot set RX flow hash configuration: Invalid argument
After this patch:
$ sudo ethtool -L eth1 combined 10 $ sudo ethtool -X eth1 default $ sudo ethtool -x eth1 RX flow hash indirection table for eth1 with 10 RX ring(s): 0: 0 1 2 3 4 5 6 7 8: 8 9 0 1 2 3 4 5 16: 6 7 8 9 0 1 2 3 24: 4 5 6 7 8 9 0 1 ...
Fixes: 1c7cf0784e4d ("ixgbe: support for ethtool set_rxfh") Signed-off-by: Joe Damato jdamato@fastly.com Reviewed-by: Sridhar Samudrala sridhar.samudrala@intel.com Tested-by: Pucha Himasekhar Reddy himasekharx.reddy.pucha@intel.com (A Contingent worker at Intel) Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c index 55983904b6df1..472ea068ea7b0 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c @@ -3107,8 +3107,8 @@ static int ixgbe_set_rxfh(struct net_device *netdev, const u32 *indir, int i; u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
- if (hfunc) - return -EINVAL; + if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) + return -EOPNOTSUPP;
/* Fill out the redirection table */ if (indir) {