net: stmmac: Add DMA related callbacks for XGMAC2

Add the DMA related callbacks for the new IP block XGMAC2.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/Makefile

@@ -5,7 +5,7 @@ stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o ring_mode.o	\
 	      dwmac100_core.o dwmac100_dma.o enh_desc.o norm_desc.o	\
 	      mmc_core.o stmmac_hwtstamp.o stmmac_ptp.o dwmac4_descs.o	\
 	      dwmac4_dma.o dwmac4_lib.o dwmac4_core.o dwmac5.o hwif.o \
-	      stmmac_tc.o dwxgmac2_core.o $(stmmac-y)
+	      stmmac_tc.o dwxgmac2_core.o dwxgmac2_dma.o $(stmmac-y)
 
 # Ordering matters. Generic driver must be last.
 obj-$(CONFIG_STMMAC_PLATFORM)	+= stmmac-platform.o

drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h

@@ -138,4 +138,61 @@
 #define XGMAC_ABPSIS			BIT(1)
 #define XGMAC_TXUNFIS			BIT(0)
 
+/* DMA Registers */
+#define XGMAC_DMA_MODE			0x00003000
+#define XGMAC_SWR			BIT(0)
+#define XGMAC_DMA_SYSBUS_MODE		0x00003004
+#define XGMAC_WR_OSR_LMT		GENMASK(29, 24)
+#define XGMAC_WR_OSR_LMT_SHIFT		24
+#define XGMAC_RD_OSR_LMT		GENMASK(21, 16)
+#define XGMAC_RD_OSR_LMT_SHIFT		16
+#define XGMAC_EN_LPI			BIT(15)
+#define XGMAC_LPI_XIT_PKT		BIT(14)
+#define XGMAC_AAL			BIT(12)
+#define XGMAC_BLEN			GENMASK(7, 1)
+#define XGMAC_BLEN256			BIT(7)
+#define XGMAC_BLEN128			BIT(6)
+#define XGMAC_BLEN64			BIT(5)
+#define XGMAC_BLEN32			BIT(4)
+#define XGMAC_BLEN16			BIT(3)
+#define XGMAC_BLEN8			BIT(2)
+#define XGMAC_BLEN4			BIT(1)
+#define XGMAC_UNDEF			BIT(0)
+#define XGMAC_DMA_CH_CONTROL(x)		(0x00003100 + (0x80 * (x)))
+#define XGMAC_PBLx8			BIT(16)
+#define XGMAC_DMA_CH_TX_CONTROL(x)	(0x00003104 + (0x80 * (x)))
+#define XGMAC_TxPBL			GENMASK(21, 16)
+#define XGMAC_TxPBL_SHIFT		16
+#define XGMAC_TSE			BIT(12)
+#define XGMAC_OSP			BIT(4)
+#define XGMAC_TXST			BIT(0)
+#define XGMAC_DMA_CH_RX_CONTROL(x)	(0x00003108 + (0x80 * (x)))
+#define XGMAC_RxPBL			GENMASK(21, 16)
+#define XGMAC_RxPBL_SHIFT		16
+#define XGMAC_RXST			BIT(0)
+#define XGMAC_DMA_CH_TxDESC_LADDR(x)	(0x00003114 + (0x80 * (x)))
+#define XGMAC_DMA_CH_RxDESC_LADDR(x)	(0x0000311c + (0x80 * (x)))
+#define XGMAC_DMA_CH_TxDESC_TAIL_LPTR(x)	(0x00003124 + (0x80 * (x)))
+#define XGMAC_DMA_CH_RxDESC_TAIL_LPTR(x)	(0x0000312c + (0x80 * (x)))
+#define XGMAC_DMA_CH_TxDESC_RING_LEN(x)		(0x00003130 + (0x80 * (x)))
+#define XGMAC_DMA_CH_RxDESC_RING_LEN(x)		(0x00003134 + (0x80 * (x)))
+#define XGMAC_DMA_CH_INT_EN(x)		(0x00003138 + (0x80 * (x)))
+#define XGMAC_NIE			BIT(15)
+#define XGMAC_AIE			BIT(14)
+#define XGMAC_RBUE			BIT(7)
+#define XGMAC_RIE			BIT(6)
+#define XGMAC_TIE			BIT(0)
+#define XGMAC_DMA_INT_DEFAULT_EN	(XGMAC_NIE | XGMAC_AIE | XGMAC_RBUE | \
+					XGMAC_RIE | XGMAC_TIE)
+#define XGMAC_DMA_CH_Rx_WATCHDOG(x)	(0x0000313c + (0x80 * (x)))
+#define XGMAC_RWT			GENMASK(7, 0)
+#define XGMAC_DMA_CH_STATUS(x)		(0x00003160 + (0x80 * (x)))
+#define XGMAC_NIS			BIT(15)
+#define XGMAC_AIS			BIT(14)
+#define XGMAC_FBE			BIT(12)
+#define XGMAC_RBU			BIT(7)
+#define XGMAC_RI			BIT(6)
+#define XGMAC_TPS			BIT(1)
+#define XGMAC_TI			BIT(0)
+
 #endif /* __STMMAC_DWXGMAC2_H__ */

drivers/net/ethernet/stmicro/stmmac/hwif.c

@@ -197,7 +197,7 @@ static const struct stmmac_hwif_entry {
 			.mmc_off = 0,
 		},
 		.desc = NULL,
-		.dma = NULL,
+		.dma = &dwxgmac210_dma_ops,
 		.mac = &dwxgmac210_ops,
 		.hwtimestamp = NULL,
 		.mode = NULL,

drivers/net/ethernet/stmicro/stmmac/hwif.h

@@ -480,6 +480,7 @@ extern const struct stmmac_dma_ops dwmac410_dma_ops;
 extern const struct stmmac_ops dwmac510_ops;
 extern const struct stmmac_tc_ops dwmac510_tc_ops;
 extern const struct stmmac_ops dwxgmac210_ops;
+extern const struct stmmac_dma_ops dwxgmac210_dma_ops;
 
 #define GMAC_VERSION		0x00000020	/* GMAC CORE Version */
 #define GMAC4_VERSION		0x00000110	/* GMAC4+ CORE Version */