+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Thu, 3 Nov 2022 17:46:25 +0100
-Subject: [PATCH] net: ethernet: mtk_eth_soc: drop packets to WDMA if the
- ring is full
-
-Improves handling of DMA ring overflow.
-Clarify other WDMA drop related comment.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -3745,9 +3745,12 @@ static int mtk_hw_init(struct mtk_eth *e
- 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);
-
---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
-+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
-@@ -139,6 +139,7 @@
- #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))