[][Enable WDMA Rx ring full drop for Panther]
[Description]
Add configurations to enable WDMA Rx ring full drop for
solving Panther AX7800/AX8400 5G(MT7915) WA CPU bound issue.
If without this patch, system might run into WiFi Tx/Rx
deadlock issue or WiFi Tx small packet low throughput issue.
[Release-log]
N/A
Change-Id: I57cd4a8e3ae19bdcb34d7d042989b7c1327ea08e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6193220
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 3cd1e3b..9789b28 100755
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2937,8 +2937,11 @@
/* PSE Free Queue Flow Control */
mtk_w32(eth, 0x01fa01f4, PSE_FQFC_CFG2);
- /* PSE should not drop port8 and port9 packets */
- mtk_w32(eth, 0x00000300, PSE_DROP_CFG);
+ /* PSE should not drop port8 and port9 packets from WDMA Tx */
+ mtk_w32(eth, 0x00000300, PSE_NO_DROP_CFG);
+
+ /* PSE should drop p8 and p9 packets when WDMA Rx ring full*/
+ mtk_w32(eth, 0x00000300, PSE_PPE0_DROP);
/* PSE config input queue threshold */
mtk_w32(eth, 0x001a000e, PSE_IQ_REV(1));
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index b6380ff..d74107b 100755
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -124,7 +124,8 @@
/* PSE Free Queue Flow Control */
#define PSE_FQFC_CFG1 0x100
#define PSE_FQFC_CFG2 0x104
-#define PSE_DROP_CFG 0x108
+#define PSE_NO_DROP_CFG 0x108
+#define PSE_PPE0_DROP 0x110
/* PSE Input Queue Reservation Register*/
#define PSE_IQ_REV(x) (0x140 + ((x - 1) * 0x4))