From: Felix Fietkau <nbd@nbd.name>
To: netdev@vger.kernel.org, John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
Lorenzo Bianconi <lorenzo@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH net-next 2/6] net: ethernet: mtk_eth_soc: drop packets to WDMA if the ring is full
Date: Wed, 16 Nov 2022 09:07:30 +0100 [thread overview]
Message-ID: <20221116080734.44013-3-nbd@nbd.name> (raw)
In-Reply-To: <20221116080734.44013-1-nbd@nbd.name>
Improves handling of DMA ring overflow.
Clarify other WDMA drop related comment.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 ++++-
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index a9a6b53b4286..fbfc23923bf5 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -3393,9 +3393,12 @@ static int mtk_hw_init(struct mtk_eth *eth)
mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP);
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
- /* PSE should not drop port8 and port9 packets */
+ /* PSE should not drop port8 and port9 packets from WDMA Tx */
mtk_w32(eth, 0x00000300, PSE_DROP_CFG);
+ /* PSE should drop packets to port 8/9 on WDMA Rx ring full */
+ mtk_w32(eth, 0x00000300, PSE_PPE0_DROP);
+
/* PSE Free Queue Flow Control */
mtk_w32(eth, 0x01fa01f4, PSE_FQFC_CFG2);
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 72d3bfc2323d..eaaa0c67ef2a 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -127,6 +127,7 @@
#define PSE_FQFC_CFG1 0x100
#define PSE_FQFC_CFG2 0x104
#define PSE_DROP_CFG 0x108
+#define PSE_PPE0_DROP 0x110
/* PSE Input Queue Reservation Register*/
#define PSE_IQ_REV(x) (0x140 + (((x) - 1) << 2))
--
2.38.1
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next prev parent reply other threads:[~2022-11-16 8:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-16 8:07 Multiqueue support for mtk_eth_soc Felix Fietkau
2022-11-16 8:07 ` [PATCH net-next 1/6] net: ethernet: mtk_eth_soc: increase tx ring size for QDMA devices Felix Fietkau
2022-11-19 3:50 ` patchwork-bot+netdevbpf
2022-11-16 8:07 ` Felix Fietkau [this message]
2022-11-16 8:07 ` [PATCH net-next 3/6] net: ethernet: mtk_eth_soc: avoid port_mg assignment on MT7622 and newer Felix Fietkau
2022-11-16 8:07 ` [PATCH net-next 4/6] net: ethernet: mtk_eth_soc: implement multi-queue support for per-port queues Felix Fietkau
2022-11-18 15:13 ` Alexander 'lynxis' Couzens
2022-11-18 16:30 ` Felix Fietkau
2022-11-16 8:07 ` [PATCH net-next 5/6] net: dsa: tag_mtk: assign " Felix Fietkau
2022-11-16 18:26 ` Florian Fainelli
2022-11-16 8:07 ` [PATCH net-next 6/6] net: ethernet: mediatek: ppe: assign per-port queues for offloaded traffic Felix Fietkau
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