mvebu: copy 5.4 patches/kconfigs to 5.10

Just a simple copy, no refresh yet.

Reviewed-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
[do not duplicate files]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-5.10/700-mvneta-tx-queue-workaround.patch b/target/linux/mvebu/patches-5.10/700-mvneta-tx-queue-workaround.patch
new file mode 100644
index 0000000000..a82a4c0d62
--- /dev/null
+++ b/target/linux/mvebu/patches-5.10/700-mvneta-tx-queue-workaround.patch
@@ -0,0 +1,34 @@
+The hardware queue scheduling is apparently configured with fixed
+priorities, which creates a nasty fairness issue where traffic from one
+CPU can starve traffic from all other CPUs.
+
+Work around this issue by forcing all tx packets to go through one CPU,
+until this issue is fixed properly.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+--- a/drivers/net/ethernet/marvell/mvneta.c
++++ b/drivers/net/ethernet/marvell/mvneta.c
+@@ -4684,6 +4684,14 @@ static int mvneta_ethtool_set_eee(struct
+ 	return phylink_ethtool_set_eee(pp->phylink, eee);
+ }
+ 
++static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb,
++			       struct net_device *sb_dev)
++{
++	/* XXX: hardware queue scheduling is broken,
++	 * use only one queue until it is fixed */
++	return 0;
++}
++
+ static const struct net_device_ops mvneta_netdev_ops = {
+ 	.ndo_open            = mvneta_open,
+ 	.ndo_stop            = mvneta_stop,
+@@ -4694,6 +4702,7 @@ static const struct net_device_ops mvnet
+ 	.ndo_fix_features    = mvneta_fix_features,
+ 	.ndo_get_stats64     = mvneta_get_stats64,
+ 	.ndo_do_ioctl        = mvneta_ioctl,
++	.ndo_select_queue    = mvneta_select_queue,
+ 	.ndo_bpf             = mvneta_xdp,
+ 	.ndo_xdp_xmit        = mvneta_xdp_xmit,
+ };