blob: 2d95c402dc4b7fad4c7dc94f05099b4aba976c8d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
From e0eb504b1c9f973427a33d7ffef29ddecdb464b9 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 23 Jan 2023 00:56:02 +0000
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix RX data corruption issue
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Also set bit 12 when setting up MAC MCR, as MediaTek SDK did the same
change stating:
"If without this patch, kernel might receive invalid packets that are
corrupted by GMAC."[1]
This fixes issues with <= 1G speed where we could previously observe
about 30% packet loss while the bad packet counter was increasing.
Unfortunately the meaning of bit 12 is not documented anywhere in SDK
code or datasheets.
[1]: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/d8a2975939a12686c4a95c40db21efdc3f821f63
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -528,7 +528,7 @@ static int mtk_mac_finish(struct phylink
/* Setup gmac */
mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
mcr_new = mcr_cur;
- mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
+ mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_BIT_12 | MAC_MCR_FORCE_MODE |
MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK;
/* Only update control register when needed! */
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -392,6 +392,7 @@
#define MAC_MCR_FORCE_MODE BIT(15)
#define MAC_MCR_TX_EN BIT(14)
#define MAC_MCR_RX_EN BIT(13)
+#define MAC_MCR_BIT_12 BIT(12)
#define MAC_MCR_BACKOFF_EN BIT(9)
#define MAC_MCR_BACKPR_EN BIT(8)
#define MAC_MCR_FORCE_RX_FC BIT(5)
|
