From 98684d99b25033f01eae0c25110e660620253b82 Mon Sep 17 00:00:00 2001 From: Marko Ratkaj Date: Thu, 13 Jun 2019 16:40:46 +0200 Subject: mvebu: add kernel 4.19 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Marko Ratkaj [added sfp related patches from Russell King] Signed-off-by: Marek Behún [rebase; rework patches; separate and cleanup kernel configs; add espessobin dts; adjust venom dts] Signed-off-by: Tomasz Maciej Nowak --- .../300-mvneta-tx-queue-workaround.patch | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 target/linux/mvebu/patches-4.19/300-mvneta-tx-queue-workaround.patch (limited to 'target/linux/mvebu/patches-4.19/300-mvneta-tx-queue-workaround.patch') diff --git a/target/linux/mvebu/patches-4.19/300-mvneta-tx-queue-workaround.patch b/target/linux/mvebu/patches-4.19/300-mvneta-tx-queue-workaround.patch new file mode 100644 index 0000000000..c27b5d9478 --- /dev/null +++ b/target/linux/mvebu/patches-4.19/300-mvneta-tx-queue-workaround.patch @@ -0,0 +1,35 @@ +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 +--- +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -4257,6 +4257,15 @@ 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, ++ select_queue_fallback_t fallback) ++{ ++ /* 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, +@@ -4267,6 +4276,7 @@ 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, + }; + + static const struct ethtool_ops mvneta_eth_tool_ops = { -- cgit v1.2.3