openwrt/target/linux/mvebu/patches-5.4/023-net-mvneta-fix-XDP-support-if-sw-bm-is-used-as-fallb.patch
John Audia da98603597 kernel: bump 5.4 to 5.4.58
This PR is a blend of several kernel bumps authored by ldir taken from his
staging tree w/ some further adjustments made by me and update_kernel.sh

Summary:
Deleted upstreamed patches:
  generic:
    742-v5.5-net-sfp-add-support-for-module-quirks.patch
    743-v5.5-net-sfp-add-some-quirks-for-GPON-modules.patch
  bcm63xx:
    022-v5.8-mtd-rawnand-brcmnand-correctly-verify-erased-pages.patch
    024-v5.8-mtd-rawnand-brcmnand-fix-CS0-layout.patch
  mediatek:
    0402-net-ethernet-mtk_eth_soc-Always-call-mtk_gmac0_rgmii.patch

Deleted patches applied differently upstream:
  generic:
    641-sch_cake-fix-IP-protocol-handling-in-the-presence-of.patch

Manually merged patches:
  generic:
    395-v5.8-net-sch_cake-Take-advantage-of-skb-hash-where-appropriate.patch
  bcm27xx:
    950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch
  layerscape:
    701-net-0231-enetc-Use-DT-protocol-information-to-set-up-the-port.patch

Build system: x86_64
Build-tested: ath79/generic, bcm27xx/bcm2708, bcm27xx/bcm2711,
  imx6, mvebu/cortexa9, sunxi/a53
Run-tested: Netgear R7800 (ipq806x)

No dmesg regressions, everything functional

Signed-off-by: John Audia <graysky@archlinux.us>
Tested-By: Lucian Cristian <Lucian.cristian@gmail.com> [mvebu]
Tested-By: Curtis Deptuck <curtdept@me.com> [x86/64]
[do not remove 395-v5.8-net-sch_cake-Take-advantage-... patch,
adjust and refresh patches, adjust commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Tested-By: John Audia <graysky@archlinux.us> [ipq806x]
2020-08-18 18:14:54 +02:00

68 lines
2.5 KiB
Diff

From 44efc78d0e464ce70b45b165c005f8bedc17952e Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 29 Jan 2020 12:50:53 +0100
Subject: [PATCH] net: mvneta: fix XDP support if sw bm is used as fallback
In order to fix XDP support if sw buffer management is used as fallback
for hw bm devices, define MVNETA_SKB_HEADROOM as maximum between
XDP_PACKET_HEADROOM and NET_SKB_PAD and let the hw aligns the IP header
to 4-byte boundary.
Fix rx_offset_correction initialization if mvneta_bm_port_init fails in
mvneta_resume routine
Fixes: 0db51da7a8e9 ("net: mvneta: add basic XDP support")
Tested-by: Sven Auhagen <sven.auhagen@voleatech.de>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/marvell/mvneta.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -326,8 +326,7 @@
ETH_HLEN + ETH_FCS_LEN, \
cache_line_size())
-#define MVNETA_SKB_HEADROOM (max(XDP_PACKET_HEADROOM, NET_SKB_PAD) + \
- NET_IP_ALIGN)
+#define MVNETA_SKB_HEADROOM max(XDP_PACKET_HEADROOM, NET_SKB_PAD)
#define MVNETA_SKB_PAD (SKB_DATA_ALIGN(sizeof(struct skb_shared_info) + \
MVNETA_SKB_HEADROOM))
#define MVNETA_SKB_SIZE(len) (SKB_DATA_ALIGN(len) + MVNETA_SKB_PAD)
@@ -1174,6 +1173,7 @@ bm_mtu_err:
mvneta_bm_pool_destroy(pp->bm_priv, pp->pool_short, 1 << pp->id);
pp->bm_priv = NULL;
+ pp->rx_offset_correction = MVNETA_SKB_HEADROOM;
mvreg_write(pp, MVNETA_ACC_MODE, MVNETA_ACC_MODE_EXT1);
netdev_info(pp->dev, "fail to update MTU, fall back to software BM\n");
}
@@ -4984,7 +4984,6 @@ static int mvneta_probe(struct platform_
SET_NETDEV_DEV(dev, &pdev->dev);
pp->id = global_port_id++;
- pp->rx_offset_correction = MVNETA_SKB_HEADROOM;
/* Obtain access to BM resources if enabled and already initialized */
bm_node = of_parse_phandle(dn, "buffer-manager", 0);
@@ -5009,6 +5008,10 @@ static int mvneta_probe(struct platform_
}
of_node_put(bm_node);
+ /* sw buffer management */
+ if (!pp->bm_priv)
+ pp->rx_offset_correction = MVNETA_SKB_HEADROOM;
+
err = mvneta_init(&pdev->dev, pp);
if (err < 0)
goto err_netdev;
@@ -5166,6 +5169,7 @@ static int mvneta_resume(struct device *
err = mvneta_bm_port_init(pdev, pp);
if (err < 0) {
dev_info(&pdev->dev, "use SW buffer management\n");
+ pp->rx_offset_correction = MVNETA_SKB_HEADROOM;
pp->bm_priv = NULL;
}
}