This is a note to let you know that I've just added the patch titled
ixgbe: Allow flow hash to be set via ethtool
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ixgbe-allow-flow-hash-to-be-set-via-ethtool.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c9b9a2de51c34da076236e8456a01e4bd7cff815
Author: Joe Damato <jdamato@xxxxxxxxxx>
Date: Sun Apr 16 19:12:22 2023 +0000
ixgbe: Allow flow hash to be set via ethtool
[ 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@xxxxxxxxxx>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@xxxxxxxxx>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@xxxxxxxxx> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index f7e68083200cf..4bfa9ba8201b1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -3020,8 +3020,8 @@ 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) {
