netdev - [PATCH net v2 3/5] net: ethernet: mtk_eth_soc: revise QDMA packet scheduler settings

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Message-ID: <18040f60f9e2f5855036b75b28c4332a2d2ebdd8.1744764277.git.daniel@makrotopia.org>
Date: Wed, 16 Apr 2025 01:51:25 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Felix Fietkau <nbd@....name>, Sean Wang <sean.wang@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Daniel Golle <daniel@...rotopia.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH net v2 3/5] net: ethernet: mtk_eth_soc: revise QDMA packet
 scheduler settings

From: Bo-Cun Chen <bc-bocun.chen@...iatek.com>

The QDMA packet scheduler suffers from a performance issue.
Fix this by picking up changes from MediaTek's SDK which change to use
Token Bucket instead of Leaky Bucket and fix the SPEED_1000 configuration.

Fixes: 160d3a9b1929 ("net: ethernet: mtk_eth_soc: introduce MTK_NETSYS_V2 support")
Signed-off-by: Bo-Cun Chen <bc-bocun.chen@...iatek.com>
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
v2: no change
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 5a3cfb8908a17..bdb98c9d8b1c1 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -762,8 +762,8 @@ static void mtk_set_queue_speed(struct mtk_eth *eth, unsigned int idx,
 			break;
 		case SPEED_1000:
 			val |= MTK_QTX_SCH_MAX_RATE_EN |
-			       FIELD_PREP(MTK_QTX_SCH_MAX_RATE_MAN, 10) |
-			       FIELD_PREP(MTK_QTX_SCH_MAX_RATE_EXP, 5) |
+			       FIELD_PREP(MTK_QTX_SCH_MAX_RATE_MAN, 1) |
+			       FIELD_PREP(MTK_QTX_SCH_MAX_RATE_EXP, 6) |
 			       FIELD_PREP(MTK_QTX_SCH_MAX_RATE_WEIGHT, 10);
 			break;
 		default:
@@ -3320,7 +3320,7 @@ static int mtk_start_dma(struct mtk_eth *eth)
 		if (mtk_is_netsys_v2_or_greater(eth))
 			val |= MTK_MUTLI_CNT | MTK_RESV_BUF |
 			       MTK_WCOMP_EN | MTK_DMAD_WR_WDONE |
-			       MTK_CHK_DDONE_EN | MTK_LEAKY_BUCKET_EN;
+			       MTK_CHK_DDONE_EN;
 		else
 			val |= MTK_RX_BT_32DWORDS;
 		mtk_w32(eth, val, reg_map->qdma.glo_cfg);
-- 
2.49.0