applied 0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch

frank-w · Feb 14, 2018 · 44360bb · 44360bb
1 parent c76803f
commit 44360bb
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Showing 2 changed files with 11 additions and 4 deletions.
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1003,10 +1003,16 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
 		if (!(trxd.rxd2 & RX_DMA_DONE))
 			break;
 
-		/* find out which mac the packet come from. values start at 1 */
-		mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) &
-		      RX_DMA_FPORT_MASK;
-		mac--;
+		/* find out which mac the packet comes from. If the special tag is
+		 * we can assume that the traffic is coming from the builtin mt7530
+		 * and the DSA driver has loaded. FPORT will be the physical switch
+		 * port in this case rather than the FE forward port id. */
+		if (!(trxd.rxd4 & RX_DMA_SP_TAG)) {
+			/* values start at 1 */
+			mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) &
+			      RX_DMA_FPORT_MASK;
+			mac--;
+		}
 
 		if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT ||
 			     !eth->netdev[mac]))

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -287,6 +287,7 @@
 
 /* QDMA descriptor rxd4 */
 #define RX_DMA_L4_VALID		BIT(24)
+#define RX_DMA_SP_TAG		BIT(22)
 #define RX_DMA_FPORT_SHIFT	19
 #define RX_DMA_FPORT_MASK	0x7