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76f9aa6f4b
This patch backports XDP support in the mvneta driver used by Marvell ARMADA 37x, 38x and 37xx series SoCs. Supported actions are: - XDP_DROP - XDP_PASS - XDP_REDIRECT - XDP_TX Patches are present upstream as following commits: * b0a43db9087a net: mvneta: add XDP_TX support * 9e58c8b41065 net: mvneta: make tx buffer array agnostic * fa383f6b77a2 net: mvneta: move header prefetch in mvneta_swbm_rx_frame * 0db51da7a8e9 net: mvneta: add basic XDP support * 8dc9a0888f4c net: mvneta: rely on build_skb in mvneta_rx_swbm poll routine * 568a3fa24a95 net: mvneta: introduce page pool API for sw buffer manager * ff519e2acd46 net: mvneta: introduce mvneta_update_stats routine Signed-off-by: Jakov Petrina <jakov.petrina@sartura.hr>
35 lines
1.2 KiB
Diff
35 lines
1.2 KiB
Diff
The hardware queue scheduling is apparently configured with fixed
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priorities, which creates a nasty fairness issue where traffic from one
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CPU can starve traffic from all other CPUs.
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Work around this issue by forcing all tx packets to go through one CPU,
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until this issue is fixed properly.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/marvell/mvneta.c
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+++ b/drivers/net/ethernet/marvell/mvneta.c
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@@ -4644,6 +4644,14 @@ static int mvneta_ethtool_set_eee(struct
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return phylink_ethtool_set_eee(pp->phylink, eee);
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}
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+static u16 mvneta_select_queue(struct net_device *dev, struct sk_buff *skb,
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+ struct net_device *sb_dev)
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+{
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+ /* XXX: hardware queue scheduling is broken,
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+ * use only one queue until it is fixed */
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+ return 0;
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+}
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+
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static const struct net_device_ops mvneta_netdev_ops = {
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.ndo_open = mvneta_open,
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.ndo_stop = mvneta_stop,
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@@ -4654,6 +4662,7 @@ static const struct net_device_ops mvnet
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.ndo_fix_features = mvneta_fix_features,
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.ndo_get_stats64 = mvneta_get_stats64,
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.ndo_do_ioctl = mvneta_ioctl,
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+ .ndo_select_queue = mvneta_select_queue,
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.ndo_bpf = mvneta_xdp,
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.ndo_xdp_xmit = mvneta_xdp_xmit,
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};
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