Merge branch 'stmmac-GMAC4.x'

Alexandre TORGUE says:

====================
Enhance stmmac driver to support GMAC4.x IP

This is a subset of patch to enhance current stmmac driver to support
new GMAC4.x chips. New set of callbacks is defined to support this new
family: descriptors, dma, core.

One of main changes of GMAC 4.xx IP is descriptors management.
 -descriptors are only used in ring mode.
 -A descriptor is composed of 4 32bits registers (no more extended
  descriptors)
 -descriptor mechanism (Tx for example, but it is exactly the same for RX):
 -useful registers:
  -DMA_CH#_TxDesc_Ring_Len: length of transmit descriptor ring
  -DMA_CH#_TxDesc_List_Address: start address of the ring
  -DMA_CH#_TxDesc_Tail_Pointer: address of the last descriptor to send + 1.
  -DMA_CH#_TxDesc_Current_App_TxDesc: address of the current descriptor

 -The descriptor Tail Pointer register contains the pointer to the
  descriptor address (N). The base address and the current
  descriptor decide the address of the current descriptor that the
  DMA can process. The descriptors up to one location less than the
  one indicated by the descriptor tail pointer (N-1) are owned by
  the DMA. The DMA continues to process the descriptors until the
  following condition occurs:
  "current descriptor pointer == Descriptor Tail pointer"

  Then the DMA goes into suspend mode. The application must perform
  a write to descriptor tail pointer register and update the tail
  pointer to have the following condition and to start a new transfer:
  "current descriptor pointer < Descriptor tail pointer"

  The DMA automatically wraps around the base address when the end
  of ring is reached.

New features are available on IP:
 -TSO (TCP Segmentation Offload) for TX only
 -Split header: to have header and payload in 2 different buffers (not yet implemented)

Below some throughput figures obtained on some boxes:

                        iperf (mbps)
--------------------------------------
                       tcp     udp
                    tx   rx   tx  rx
                     -----------------
    GMAC4.x         935  930  750 800

Note: There is a change in 4.10a databook on bitfield mapping of DMA_CHANx_INTR_ENA register.
This requires to have é diffrent set of callbacks between IP 4.00a and 4.10a.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/stmmac.txt

@@ -59,6 +59,8 @@ Optional properties:
 	- snps,fb: fixed-burst
 	- snps,mb: mixed-burst
 	- snps,rb: rebuild INCRx Burst
+	- snps,tso: this enables the TSO feature otherwise it will be managed by
+	    MAC HW capability register.
 - mdio: with compatible = "snps,dwmac-mdio", create and register mdio bus.
 
 Examples:

Documentation/networking/stmmac.txt

        STMicroelectronics 10/100/1000 Synopsys Ethernet driver
 
-Copyright (C) 2007-2014  STMicroelectronics Ltd
+Copyright (C) 2007-2015  STMicroelectronics Ltd
 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
 
 This is the driver for the MAC 10/100/1000 on-chip Ethernet controllers
@@ -138,6 +138,8 @@ struct plat_stmmacenet_data {
 	int (*init)(struct platform_device *pdev, void *priv);
 	void (*exit)(struct platform_device *pdev, void *priv);
 	void *bsp_priv;
+	int has_gmac4;
+	bool tso_en;
 };
 
 Where:
@@ -181,6 +183,8 @@ Where:
 	     registers.  init/exit callbacks should not use or modify
 	     platform data.
  o bsp_priv: another private pointer.
+ o has_gmac4: uses GMAC4 core.
+ o tso_en: Enables TSO (TCP Segmentation Offload) feature.
 
 For MDIO bus The we have:
 
@@ -278,6 +282,13 @@ Please see the following document:
  o stmmac_ethtool.c: to implement the ethtool support;
  o stmmac.h: private driver structure;
  o common.h: common definitions and VFTs;
+ o mmc_core.c/mmc.h: Management MAC Counters;
+ o stmmac_hwtstamp.c: HW timestamp support for PTP;
+ o stmmac_ptp.c: PTP 1588 clock;
+ o dwmac-<XXX>.c: these are for the platform glue-logic file; e.g. dwmac-sti.c
+   for STMicroelectronics SoCs.
+
+- GMAC 3.x
  o descs.h: descriptor structure definitions;
  o dwmac1000_core.c: dwmac GiGa core functions;
  o dwmac1000_dma.c: dma functions for the GMAC chip;
@@ -289,11 +300,32 @@ Please see the following document:
  o enh_desc.c: functions for handling enhanced descriptors;
  o norm_desc.c: functions for handling normal descriptors;
  o chain_mode.c/ring_mode.c:: functions to manage RING/CHAINED modes;
- o mmc_core.c/mmc.h: Management MAC Counters;
- o stmmac_hwtstamp.c: HW timestamp support for PTP;
- o stmmac_ptp.c: PTP 1588 clock;
- o dwmac-<XXX>.c: these are for the platform glue-logic file; e.g. dwmac-sti.c
-   for STMicroelectronics SoCs.
+
+- GMAC4.x generation
+ o dwmac4_core.c: dwmac GMAC4.x core functions;
+ o dwmac4_desc.c: functions for handling GMAC4.x descriptors;
+ o dwmac4_descs.h: descriptor definitions;
+ o dwmac4_dma.c: dma functions for the GMAC4.x chip;
+ o dwmac4_dma.h: dma definitions for the GMAC4.x chip;
+ o dwmac4.h: core definitions for the GMAC4.x chip;
+ o dwmac4_lib.c: generic GMAC4.x functions;
+
+4.12) TSO support (GMAC4.x)
+
+TSO (Tcp Segmentation Offload) feature is supported by GMAC 4.x chip family.
+When a packet is sent through TCP protocol, the TCP stack ensures that
+the SKB provided to the low level driver (stmmac in our case) matches with
+the maximum frame len (IP header + TCP header + payload <= 1500 bytes (for
+MTU set to 1500)). It means that if an application using TCP want to send a
+packet which will have a length (after adding headers) > 1514 the packet
+will be split in several TCP packets: The data payload is split and headers
+(TCP/IP ..) are added. It is done by software.
+
+When TSO is enabled, the TCP stack doesn't care about the maximum frame
+length and provide SKB packet to stmmac as it is. The GMAC IP will have to
+perform the segmentation by it self to match with maximum frame length.
+
+This feature can be enabled in device tree through "snps,tso" entry.
 
 5) Debug Information
 

MAINTAINERS

@@ -3348,6 +3348,7 @@ F:	Documentation/powerpc/cxlflash.txt
 
 STMMAC ETHERNET DRIVER
 M:	Giuseppe Cavallaro <peppe.cavallaro@st.com>
+M:	Alexandre Torgue <alexandre.torgue@st.com>
 L:	netdev@vger.kernel.org
 W:	http://www.stlinux.com
 S:	Supported

drivers/net/ethernet/stmicro/stmmac/Makefile

@@ -2,7 +2,8 @@ obj-$(CONFIG_STMMAC_ETH) += stmmac.o
 stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o ring_mode.o	\
 	      chain_mode.o dwmac_lib.o dwmac1000_core.o dwmac1000_dma.o	\
 	      dwmac100_core.o dwmac100_dma.o enh_desc.o norm_desc.o	\
-	      mmc_core.o stmmac_hwtstamp.o stmmac_ptp.o $(stmmac-y)
+	      mmc_core.o stmmac_hwtstamp.o stmmac_ptp.o dwmac4_descs.o	\
+	      dwmac4_dma.o dwmac4_lib.o dwmac4_core.o $(stmmac-y)
 
 # Ordering matters. Generic driver must be last.
 obj-$(CONFIG_STMMAC_PLATFORM)	+= stmmac-platform.o

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

@@ -41,6 +41,8 @@
 /* Synopsys Core versions */
 #define	DWMAC_CORE_3_40	0x34
 #define	DWMAC_CORE_3_50	0x35
+#define	DWMAC_CORE_4_00	0x40
+#define STMMAC_CHAN0	0	/* Always supported and default for all chips */
 
 #define DMA_TX_SIZE 512
 #define DMA_RX_SIZE 512
@@ -167,6 +169,9 @@ struct stmmac_extra_stats {
 	unsigned long mtl_rx_fifo_ctrl_active;
 	unsigned long mac_rx_frame_ctrl_fifo;
 	unsigned long mac_gmii_rx_proto_engine;
+	/* TSO */
+	unsigned long tx_tso_frames;
+	unsigned long tx_tso_nfrags;
 };
 
 /* CSR Frequency Access Defines*/
@@ -243,6 +248,7 @@ enum rx_frame_status {
 	csum_none = 0x2,
 	llc_snap = 0x4,
 	dma_own = 0x8,
+	rx_not_ls = 0x10,
 };
 
 /* Tx status */
@@ -269,6 +275,7 @@ enum dma_irq_status {
 #define	CORE_PCS_ANE_COMPLETE		(1 << 5)
 #define	CORE_PCS_LINK_STATUS		(1 << 6)
 #define	CORE_RGMII_IRQ			(1 << 7)
+#define CORE_IRQ_MTL_RX_OVERFLOW	BIT(8)
 
 /* Physical Coding Sublayer */
 struct rgmii_adv {
@@ -300,8 +307,10 @@ struct dma_features {
 	/* 802.3az - Energy-Efficient Ethernet (EEE) */
 	unsigned int eee;
 	unsigned int av;
+	unsigned int tsoen;
 	/* TX and RX csum */
 	unsigned int tx_coe;
+	unsigned int rx_coe;
 	unsigned int rx_coe_type1;
 	unsigned int rx_coe_type2;
 	unsigned int rxfifo_over_2048;
@@ -348,6 +357,10 @@ struct stmmac_desc_ops {
 	void (*prepare_tx_desc) (struct dma_desc *p, int is_fs, int len,
 				 bool csum_flag, int mode, bool tx_own,
 				 bool ls);
+	void (*prepare_tso_tx_desc)(struct dma_desc *p, int is_fs, int len1,
+				    int len2, bool tx_own, bool ls,
+				    unsigned int tcphdrlen,
+				    unsigned int tcppayloadlen);
 	/* Set/get the owner of the descriptor */
 	void (*set_tx_owner) (struct dma_desc *p);
 	int (*get_tx_owner) (struct dma_desc *p);
@@ -380,6 +393,10 @@ struct stmmac_desc_ops {
 	 u64(*get_timestamp) (void *desc, u32 ats);
 	/* get rx timestamp status */
 	int (*get_rx_timestamp_status) (void *desc, u32 ats);
+	/* Display ring */
+	void (*display_ring)(void *head, unsigned int size, bool rx);
+	/* set MSS via context descriptor */
+	void (*set_mss)(struct dma_desc *p, unsigned int mss);
 };
 
 extern const struct stmmac_desc_ops enh_desc_ops;
@@ -412,9 +429,15 @@ struct stmmac_dma_ops {
 	int (*dma_interrupt) (void __iomem *ioaddr,
 			      struct stmmac_extra_stats *x);
 	/* If supported then get the optional core features */
-	unsigned int (*get_hw_feature) (void __iomem *ioaddr);
+	void (*get_hw_feature)(void __iomem *ioaddr,
+			       struct dma_features *dma_cap);
 	/* Program the HW RX Watchdog */
 	void (*rx_watchdog) (void __iomem *ioaddr, u32 riwt);
+	void (*set_tx_ring_len)(void __iomem *ioaddr, u32 len);
+	void (*set_rx_ring_len)(void __iomem *ioaddr, u32 len);
+	void (*set_rx_tail_ptr)(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
+	void (*set_tx_tail_ptr)(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
+	void (*enable_tso)(void __iomem *ioaddr, bool en, u32 chan);
 };
 
 struct mac_device_info;
@@ -463,6 +486,7 @@ struct stmmac_hwtimestamp {
 };
 
 extern const struct stmmac_hwtimestamp stmmac_ptp;
+extern const struct stmmac_mode_ops dwmac4_ring_mode_ops;
 
 struct mac_link {
 	int port;
@@ -495,7 +519,6 @@ struct mac_device_info {
 	const struct stmmac_hwtimestamp *ptp;
 	struct mii_regs mii;	/* MII register Addresses */
 	struct mac_link link;
-	unsigned int synopsys_uid;
 	void __iomem *pcsr;     /* vpointer to device CSRs */
 	int multicast_filter_bins;
 	int unicast_filter_entries;
@@ -504,18 +527,47 @@ struct mac_device_info {
 };
 
 struct mac_device_info *dwmac1000_setup(void __iomem *ioaddr, int mcbins,
-					int perfect_uc_entries);
-struct mac_device_info *dwmac100_setup(void __iomem *ioaddr);
+					int perfect_uc_entries,
+					int *synopsys_id);
+struct mac_device_info *dwmac100_setup(void __iomem *ioaddr, int *synopsys_id);
+struct mac_device_info *dwmac4_setup(void __iomem *ioaddr, int mcbins,
+				     int perfect_uc_entries, int *synopsys_id);
 
 void stmmac_set_mac_addr(void __iomem *ioaddr, u8 addr[6],
 			 unsigned int high, unsigned int low);
 void stmmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
 			 unsigned int high, unsigned int low);
-
 void stmmac_set_mac(void __iomem *ioaddr, bool enable);
 
+void stmmac_dwmac4_set_mac_addr(void __iomem *ioaddr, u8 addr[6],
+				unsigned int high, unsigned int low);
+void stmmac_dwmac4_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
+				unsigned int high, unsigned int low);
+void stmmac_dwmac4_set_mac(void __iomem *ioaddr, bool enable);
+
 void dwmac_dma_flush_tx_fifo(void __iomem *ioaddr);
 extern const struct stmmac_mode_ops ring_mode_ops;
 extern const struct stmmac_mode_ops chain_mode_ops;
-
+extern const struct stmmac_desc_ops dwmac4_desc_ops;
+
+/**
+ * stmmac_get_synopsys_id - return the SYINID.
+ * @priv: driver private structure
+ * Description: this simple function is to decode and return the SYINID
+ * starting from the HW core register.
+ */
+static inline u32 stmmac_get_synopsys_id(u32 hwid)
+{
+	/* Check Synopsys Id (not available on old chips) */
+	if (likely(hwid)) {
+		u32 uid = ((hwid & 0x0000ff00) >> 8);
+		u32 synid = (hwid & 0x000000ff);
+
+		pr_info("stmmac - user ID: 0x%x, Synopsys ID: 0x%x\n",
+			uid, synid);
+
+		return synid;
+	}
+	return 0;
+}
 #endif /* __COMMON_H__ */

drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c

@@ -491,7 +491,8 @@ static const struct stmmac_ops dwmac1000_ops = {
 };
 
 struct mac_device_info *dwmac1000_setup(void __iomem *ioaddr, int mcbins,
-					int perfect_uc_entries)
+					int perfect_uc_entries,
+					int *synopsys_id)
 {
 	struct mac_device_info *mac;
 	u32 hwid = readl(ioaddr + GMAC_VERSION);
@@ -516,7 +517,9 @@ struct mac_device_info *dwmac1000_setup(void __iomem *ioaddr, int mcbins,
 	mac->link.speed = GMAC_CONTROL_FES;
 	mac->mii.addr = GMAC_MII_ADDR;
 	mac->mii.data = GMAC_MII_DATA;
-	mac->synopsys_uid = hwid;
+
+	/* Get and dump the chip ID */
+	*synopsys_id = stmmac_get_synopsys_id(hwid);
 
 	return mac;
 }

drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c

@@ -215,9 +215,40 @@ static void dwmac1000_dump_dma_regs(void __iomem *ioaddr)
 	}
 }
 
-static unsigned int dwmac1000_get_hw_feature(void __iomem *ioaddr)
+static void dwmac1000_get_hw_feature(void __iomem *ioaddr,
+				     struct dma_features *dma_cap)
 {
-	return readl(ioaddr + DMA_HW_FEATURE);
+	u32 hw_cap = readl(ioaddr + DMA_HW_FEATURE);
+
+	dma_cap->mbps_10_100 = (hw_cap & DMA_HW_FEAT_MIISEL);
+	dma_cap->mbps_1000 = (hw_cap & DMA_HW_FEAT_GMIISEL) >> 1;
+	dma_cap->half_duplex = (hw_cap & DMA_HW_FEAT_HDSEL) >> 2;
+	dma_cap->hash_filter = (hw_cap & DMA_HW_FEAT_HASHSEL) >> 4;
+	dma_cap->multi_addr = (hw_cap & DMA_HW_FEAT_ADDMAC) >> 5;
+	dma_cap->pcs = (hw_cap & DMA_HW_FEAT_PCSSEL) >> 6;
+	dma_cap->sma_mdio = (hw_cap & DMA_HW_FEAT_SMASEL) >> 8;
+	dma_cap->pmt_remote_wake_up = (hw_cap & DMA_HW_FEAT_RWKSEL) >> 9;
+	dma_cap->pmt_magic_frame = (hw_cap & DMA_HW_FEAT_MGKSEL) >> 10;
+	/* MMC */
+	dma_cap->rmon = (hw_cap & DMA_HW_FEAT_MMCSEL) >> 11;
+	/* IEEE 1588-2002 */
+	dma_cap->time_stamp =
+	    (hw_cap & DMA_HW_FEAT_TSVER1SEL) >> 12;
+	/* IEEE 1588-2008 */
+	dma_cap->atime_stamp = (hw_cap & DMA_HW_FEAT_TSVER2SEL) >> 13;
+	/* 802.3az - Energy-Efficient Ethernet (EEE) */
+	dma_cap->eee = (hw_cap & DMA_HW_FEAT_EEESEL) >> 14;
+	dma_cap->av = (hw_cap & DMA_HW_FEAT_AVSEL) >> 15;
+	/* TX and RX csum */
+	dma_cap->tx_coe = (hw_cap & DMA_HW_FEAT_TXCOESEL) >> 16;
+	dma_cap->rx_coe_type1 = (hw_cap & DMA_HW_FEAT_RXTYP1COE) >> 17;
+	dma_cap->rx_coe_type2 = (hw_cap & DMA_HW_FEAT_RXTYP2COE) >> 18;
+	dma_cap->rxfifo_over_2048 = (hw_cap & DMA_HW_FEAT_RXFIFOSIZE) >> 19;
+	/* TX and RX number of channels */
+	dma_cap->number_rx_channel = (hw_cap & DMA_HW_FEAT_RXCHCNT) >> 20;
+	dma_cap->number_tx_channel = (hw_cap & DMA_HW_FEAT_TXCHCNT) >> 22;
+	/* Alternate (enhanced) DESC mode */
+	dma_cap->enh_desc = (hw_cap & DMA_HW_FEAT_ENHDESSEL) >> 24;
 }
 
 static void dwmac1000_rx_watchdog(void __iomem *ioaddr, u32 riwt)

drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c

@@ -173,7 +173,7 @@ static const struct stmmac_ops dwmac100_ops = {
 	.get_umac_addr = dwmac100_get_umac_addr,
 };
 
-struct mac_device_info *dwmac100_setup(void __iomem *ioaddr)
+struct mac_device_info *dwmac100_setup(void __iomem *ioaddr, int *synopsys_id)
 {
 	struct mac_device_info *mac;
 
@@ -192,7 +192,8 @@ struct mac_device_info *dwmac100_setup(void __iomem *ioaddr)
 	mac->link.speed = 0;
 	mac->mii.addr = MAC_MII_ADDR;
 	mac->mii.data = MAC_MII_DATA;
-	mac->synopsys_uid = 0;
+	/* Synopsys Id is not available on old chips */
+	*synopsys_id = 0;
 
 	return mac;
 }

drivers/net/ethernet/stmicro/stmmac/dwmac4.h

+/*
+ * DWMAC4 Header file.
+ *
+ * Copyright (C) 2015  STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#ifndef __DWMAC4_H__
+#define __DWMAC4_H__
+
+#include "common.h"
+
+/*  MAC registers */
+#define GMAC_CONFIG			0x00000000
+#define GMAC_PACKET_FILTER		0x00000008
+#define GMAC_HASH_TAB_0_31		0x00000010
+#define GMAC_HASH_TAB_32_63		0x00000014
+#define GMAC_RX_FLOW_CTRL		0x00000090
+#define GMAC_QX_TX_FLOW_CTRL(x)		(0x70 + x * 4)
+#define GMAC_INT_STATUS			0x000000b0
+#define GMAC_INT_EN			0x000000b4
+#define GMAC_AN_CTRL			0x000000e0
+#define GMAC_AN_STATUS			0x000000e4
+#define GMAC_AN_ADV			0x000000e8
+#define GMAC_AN_LPA			0x000000ec
+#define GMAC_PMT			0x000000c0
+#define GMAC_VERSION			0x00000110
+#define GMAC_DEBUG			0x00000114
+#define GMAC_HW_FEATURE0		0x0000011c
+#define GMAC_HW_FEATURE1		0x00000120
+#define GMAC_HW_FEATURE2		0x00000124
+#define GMAC_MDIO_ADDR			0x00000200
+#define GMAC_MDIO_DATA			0x00000204
+#define GMAC_ADDR_HIGH(reg)		(0x300 + reg * 8)
+#define GMAC_ADDR_LOW(reg)		(0x304 + reg * 8)
+
+/* MAC Packet Filtering */
+#define GMAC_PACKET_FILTER_PR		BIT(0)
+#define GMAC_PACKET_FILTER_HMC		BIT(2)
+#define GMAC_PACKET_FILTER_PM		BIT(4)
+
+#define GMAC_MAX_PERFECT_ADDRESSES	128
+
+/* MAC Flow Control RX */
+#define GMAC_RX_FLOW_CTRL_RFE		BIT(0)
+
+/* MAC Flow Control TX */
+#define GMAC_TX_FLOW_CTRL_TFE		BIT(1)
+#define GMAC_TX_FLOW_CTRL_PT_SHIFT	16
+
+/*  MAC Interrupt bitmap*/
+#define GMAC_INT_PMT_EN			BIT(4)
+#define GMAC_INT_LPI_EN			BIT(5)
+
+enum dwmac4_irq_status {
+	time_stamp_irq = 0x00001000,
+	mmc_rx_csum_offload_irq = 0x00000800,
+	mmc_tx_irq = 0x00000400,
+	mmc_rx_irq = 0x00000200,
+	mmc_irq = 0x00000100,
+	pmt_irq = 0x00000010,
+	pcs_ane_irq = 0x00000004,
+	pcs_link_irq = 0x00000002,
+};
+
+/* MAC Auto-Neg bitmap*/
+#define	GMAC_AN_CTRL_RAN		BIT(9)
+#define	GMAC_AN_CTRL_ANE		BIT(12)
+#define GMAC_AN_CTRL_ELE		BIT(14)
+#define GMAC_AN_FD			BIT(5)
+#define GMAC_AN_HD			BIT(6)
+#define GMAC_AN_PSE_MASK		GENMASK(8, 7)
+#define GMAC_AN_PSE_SHIFT		7
+
+/* MAC PMT bitmap */
+enum power_event {
+	pointer_reset =	0x80000000,
+	global_unicast = 0x00000200,
+	wake_up_rx_frame = 0x00000040,
+	magic_frame = 0x00000020,
+	wake_up_frame_en = 0x00000004,
+	magic_pkt_en = 0x00000002,
+	power_down = 0x00000001,
+};
+
+/* MAC Debug bitmap */
+#define GMAC_DEBUG_TFCSTS_MASK		GENMASK(18, 17)
+#define GMAC_DEBUG_TFCSTS_SHIFT		17
+#define GMAC_DEBUG_TFCSTS_IDLE		0
+#define GMAC_DEBUG_TFCSTS_WAIT		1
+#define GMAC_DEBUG_TFCSTS_GEN_PAUSE	2
+#define GMAC_DEBUG_TFCSTS_XFER		3
+#define GMAC_DEBUG_TPESTS		BIT(16)
+#define GMAC_DEBUG_RFCFCSTS_MASK	GENMASK(2, 1)
+#define GMAC_DEBUG_RFCFCSTS_SHIFT	1
+#define GMAC_DEBUG_RPESTS		BIT(0)
+
+/* MAC config */
+#define GMAC_CONFIG_IPC			BIT(27)
+#define GMAC_CONFIG_2K			BIT(22)
+#define GMAC_CONFIG_ACS			BIT(20)
+#define GMAC_CONFIG_BE			BIT(18)
+#define GMAC_CONFIG_JD			BIT(17)
+#define GMAC_CONFIG_JE			BIT(16)
+#define GMAC_CONFIG_PS			BIT(15)
+#define GMAC_CONFIG_FES			BIT(14)
+#define GMAC_CONFIG_DM			BIT(13)
+#define GMAC_CONFIG_DCRS		BIT(9)
+#define GMAC_CONFIG_TE			BIT(1)
+#define GMAC_CONFIG_RE			BIT(0)
+
+/* MAC HW features0 bitmap */
+#define GMAC_HW_FEAT_ADDMAC		BIT(18)
+#define GMAC_HW_FEAT_RXCOESEL		BIT(16)
+#define GMAC_HW_FEAT_TXCOSEL		BIT(14)
+#define GMAC_HW_FEAT_EEESEL		BIT(13)
+#define GMAC_HW_FEAT_TSSEL		BIT(12)
+#define GMAC_HW_FEAT_MMCSEL		BIT(8)
+#define GMAC_HW_FEAT_MGKSEL		BIT(7)
+#define GMAC_HW_FEAT_RWKSEL		BIT(6)
+#define GMAC_HW_FEAT_SMASEL		BIT(5)
+#define GMAC_HW_FEAT_VLHASH		BIT(4)
+#define GMAC_HW_FEAT_PCSSEL		BIT(3)
+#define GMAC_HW_FEAT_HDSEL		BIT(2)
+#define GMAC_HW_FEAT_GMIISEL		BIT(1)
+#define GMAC_HW_FEAT_MIISEL		BIT(0)
+
+/* MAC HW features1 bitmap */
+#define GMAC_HW_FEAT_AVSEL		BIT(20)
+#define GMAC_HW_TSOEN			BIT(18)
+
+/* MAC HW features2 bitmap */
+#define GMAC_HW_FEAT_TXCHCNT		GENMASK(21, 18)
+#define GMAC_HW_FEAT_RXCHCNT		GENMASK(15, 12)
+
+/* MAC HW ADDR regs */
+#define GMAC_HI_DCS			GENMASK(18, 16)
+#define GMAC_HI_DCS_SHIFT		16
+#define GMAC_HI_REG_AE			BIT(31)
+
+/*  MTL registers */
+#define MTL_INT_STATUS			0x00000c20
+#define MTL_INT_Q0			BIT(0)
+
+#define MTL_CHAN_BASE_ADDR		0x00000d00
+#define MTL_CHAN_BASE_OFFSET		0x40
+#define MTL_CHANX_BASE_ADDR(x)		(MTL_CHAN_BASE_ADDR + \
+					(x * MTL_CHAN_BASE_OFFSET))
+
+#define MTL_CHAN_TX_OP_MODE(x)		MTL_CHANX_BASE_ADDR(x)
+#define MTL_CHAN_TX_DEBUG(x)		(MTL_CHANX_BASE_ADDR(x) + 0x8)
+#define MTL_CHAN_INT_CTRL(x)		(MTL_CHANX_BASE_ADDR(x) + 0x2c)
+#define MTL_CHAN_RX_OP_MODE(x)		(MTL_CHANX_BASE_ADDR(x) + 0x30)
+#define MTL_CHAN_RX_DEBUG(x)		(MTL_CHANX_BASE_ADDR(x) + 0x38)
+
+#define MTL_OP_MODE_RSF			BIT(5)
+#define MTL_OP_MODE_TSF			BIT(1)
+
+#define MTL_OP_MODE_TTC_MASK		0x70
+#define MTL_OP_MODE_TTC_SHIFT		4
+
+#define MTL_OP_MODE_TTC_32		0
+#define MTL_OP_MODE_TTC_64		(1 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_96		(2 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_128		(3 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_192		(4 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_256		(5 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_384		(6 << MTL_OP_MODE_TTC_SHIFT)
+#define MTL_OP_MODE_TTC_512		(7 << MTL_OP_MODE_TTC_SHIFT)
+
+#define MTL_OP_MODE_RTC_MASK		0x18
+#define MTL_OP_MODE_RTC_SHIFT		3
+
+#define MTL_OP_MODE_RTC_32		(1 << MTL_OP_MODE_RTC_SHIFT)
+#define MTL_OP_MODE_RTC_64		0
+#define MTL_OP_MODE_RTC_96		(2 << MTL_OP_MODE_RTC_SHIFT)
+#define MTL_OP_MODE_RTC_128		(3 << MTL_OP_MODE_RTC_SHIFT)
+
+/*  MTL debug */
+#define MTL_DEBUG_TXSTSFSTS		BIT(5)
+#define MTL_DEBUG_TXFSTS		BIT(4)
+#define MTL_DEBUG_TWCSTS		BIT(3)
+
+/* MTL debug: Tx FIFO Read Controller Status */
+#define MTL_DEBUG_TRCSTS_MASK		GENMASK(2, 1)
+#define MTL_DEBUG_TRCSTS_SHIFT		1
+#define MTL_DEBUG_TRCSTS_IDLE		0
+#define MTL_DEBUG_TRCSTS_READ		1
+#define MTL_DEBUG_TRCSTS_TXW		2
+#define MTL_DEBUG_TRCSTS_WRITE		3
+#define MTL_DEBUG_TXPAUSED		BIT(0)
+
+/* MAC debug: GMII or MII Transmit Protocol Engine Status */
+#define MTL_DEBUG_RXFSTS_MASK		GENMASK(5, 4)
+#define MTL_DEBUG_RXFSTS_SHIFT		4
+#define MTL_DEBUG_RXFSTS_EMPTY		0
+#define MTL_DEBUG_RXFSTS_BT		1
+#define MTL_DEBUG_RXFSTS_AT		2
+#define MTL_DEBUG_RXFSTS_FULL		3
+#define MTL_DEBUG_RRCSTS_MASK		GENMASK(2, 1)
+#define MTL_DEBUG_RRCSTS_SHIFT		1
+#define MTL_DEBUG_RRCSTS_IDLE		0
+#define MTL_DEBUG_RRCSTS_RDATA		1
+#define MTL_DEBUG_RRCSTS_RSTAT		2
+#define MTL_DEBUG_RRCSTS_FLUSH		3
+#define MTL_DEBUG_RWCSTS		BIT(0)
+
+/*  MTL interrupt */
+#define MTL_RX_OVERFLOW_INT_EN		BIT(24)
+#define MTL_RX_OVERFLOW_INT		BIT(16)
+
+/* Default operating mode of the MAC */
+#define GMAC_CORE_INIT (GMAC_CONFIG_JD | GMAC_CONFIG_PS | GMAC_CONFIG_ACS | \
+			GMAC_CONFIG_BE | GMAC_CONFIG_DCRS)
+
+/* To dump the core regs excluding  the Address Registers */
+#define	GMAC_REG_NUM	132
+
+/*  MTL debug */
+#define MTL_DEBUG_TXSTSFSTS		BIT(5)
+#define MTL_DEBUG_TXFSTS		BIT(4)
+#define MTL_DEBUG_TWCSTS		BIT(3)
+
+/* MTL debug: Tx FIFO Read Controller Status */
+#define MTL_DEBUG_TRCSTS_MASK		GENMASK(2, 1)
+#define MTL_DEBUG_TRCSTS_SHIFT		1
+#define MTL_DEBUG_TRCSTS_IDLE		0
+#define MTL_DEBUG_TRCSTS_READ		1
+#define MTL_DEBUG_TRCSTS_TXW		2
+#define MTL_DEBUG_TRCSTS_WRITE		3
+#define MTL_DEBUG_TXPAUSED		BIT(0)
+
+/* MAC debug: GMII or MII Transmit Protocol Engine Status */
+#define MTL_DEBUG_RXFSTS_MASK		GENMASK(5, 4)
+#define MTL_DEBUG_RXFSTS_SHIFT		4
+#define MTL_DEBUG_RXFSTS_EMPTY		0
+#define MTL_DEBUG_RXFSTS_BT		1
+#define MTL_DEBUG_RXFSTS_AT		2
+#define MTL_DEBUG_RXFSTS_FULL		3
+#define MTL_DEBUG_RRCSTS_MASK		GENMASK(2, 1)
+#define MTL_DEBUG_RRCSTS_SHIFT		1
+#define MTL_DEBUG_RRCSTS_IDLE		0
+#define MTL_DEBUG_RRCSTS_RDATA		1
+#define MTL_DEBUG_RRCSTS_RSTAT		2
+#define MTL_DEBUG_RRCSTS_FLUSH		3
+#define MTL_DEBUG_RWCSTS		BIT(0)
+
+extern const struct stmmac_dma_ops dwmac4_dma_ops;
+extern const struct stmmac_dma_ops dwmac410_dma_ops;
+#endif /* __DWMAC4_H__ */

drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h

+/*
+ * Header File to describe the DMA descriptors and related definitions specific
+ * for DesignWare databook 4.xx.
+ *
+ * Copyright (C) 2015  STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#ifndef __DWMAC4_DESCS_H__
+#define __DWMAC4_DESCS_H__
+
+#include <linux/bitops.h>
+
+/* Normal transmit descriptor defines (without split feature) */
+
+/* TDES2 (read format) */
+#define TDES2_BUFFER1_SIZE_MASK		GENMASK(13, 0)
+#define TDES2_VLAN_TAG_MASK		GENMASK(15, 14)
+#define TDES2_BUFFER2_SIZE_MASK		GENMASK(29, 16)
+#define TDES2_BUFFER2_SIZE_MASK_SHIFT	16
+#define TDES2_TIMESTAMP_ENABLE		BIT(30)
+#define TDES2_INTERRUPT_ON_COMPLETION	BIT(31)
+
+/* TDES3 (read format) */
+#define TDES3_PACKET_SIZE_MASK		GENMASK(14, 0)
+#define TDES3_CHECKSUM_INSERTION_MASK	GENMASK(17, 16)
+#define TDES3_CHECKSUM_INSERTION_SHIFT	16
+#define TDES3_TCP_PKT_PAYLOAD_MASK	GENMASK(17, 0)
+#define TDES3_TCP_SEGMENTATION_ENABLE	BIT(18)
+#define TDES3_HDR_LEN_SHIFT		19
+#define TDES3_SLOT_NUMBER_MASK		GENMASK(22, 19)
+#define TDES3_SA_INSERT_CTRL_MASK	GENMASK(25, 23)
+#define TDES3_CRC_PAD_CTRL_MASK		GENMASK(27, 26)
+
+/* TDES3 (write back format) */
+#define TDES3_IP_HDR_ERROR		BIT(0)
+#define TDES3_DEFERRED			BIT(1)
+#define TDES3_UNDERFLOW_ERROR		BIT(2)
+#define TDES3_EXCESSIVE_DEFERRAL	BIT(3)
+#define TDES3_COLLISION_COUNT_MASK	GENMASK(7, 4)
+#define TDES3_COLLISION_COUNT_SHIFT	4
+#define TDES3_EXCESSIVE_COLLISION	BIT(8)
+#define TDES3_LATE_COLLISION		BIT(9)
+#define TDES3_NO_CARRIER		BIT(10)
+#define TDES3_LOSS_CARRIER		BIT(11)
+#define TDES3_PAYLOAD_ERROR		BIT(12)
+#define TDES3_PACKET_FLUSHED		BIT(13)
+#define TDES3_JABBER_TIMEOUT		BIT(14)
+#define TDES3_ERROR_SUMMARY		BIT(15)
+#define TDES3_TIMESTAMP_STATUS		BIT(17)
+#define TDES3_TIMESTAMP_STATUS_SHIFT	17
+
+/* TDES3 context */
+#define TDES3_CTXT_TCMSSV		BIT(26)
+
+/* TDES3 Common */
+#define TDES3_LAST_DESCRIPTOR		BIT(28)
+#define TDES3_LAST_DESCRIPTOR_SHIFT	28
+#define TDES3_FIRST_DESCRIPTOR		BIT(29)
+#define TDES3_CONTEXT_TYPE		BIT(30)
+
+/* TDS3 use for both format (read and write back) */
+#define TDES3_OWN			BIT(31)
+#define TDES3_OWN_SHIFT			31
+
+/* Normal receive descriptor defines (without split feature) */
+
+/* RDES0 (write back format) */
+#define RDES0_VLAN_TAG_MASK		GENMASK(15, 0)
+
+/* RDES1 (write back format) */
+#define RDES1_IP_PAYLOAD_TYPE_MASK	GENMASK(2, 0)
+#define RDES1_IP_HDR_ERROR		BIT(3)
+#define RDES1_IPV4_HEADER		BIT(4)
+#define RDES1_IPV6_HEADER		BIT(5)
+#define RDES1_IP_CSUM_BYPASSED		BIT(6)
+#define RDES1_IP_CSUM_ERROR		BIT(7)
+#define RDES1_PTP_MSG_TYPE_MASK		GENMASK(11, 8)
+#define RDES1_PTP_PACKET_TYPE		BIT(12)
+#define RDES1_PTP_VER			BIT(13)
+#define RDES1_TIMESTAMP_AVAILABLE	BIT(14)
+#define RDES1_TIMESTAMP_AVAILABLE_SHIFT	14
+#define RDES1_TIMESTAMP_DROPPED		BIT(15)
+#define RDES1_IP_TYPE1_CSUM_MASK	GENMASK(31, 16)
+
+/* RDES2 (write back format) */
+#define RDES2_L3_L4_HEADER_SIZE_MASK	GENMASK(9, 0)
+#define RDES2_VLAN_FILTER_STATUS	BIT(15)
+#define RDES2_SA_FILTER_FAIL		BIT(16)
+#define RDES2_DA_FILTER_FAIL		BIT(17)
+#define RDES2_HASH_FILTER_STATUS	BIT(18)
+#define RDES2_MAC_ADDR_MATCH_MASK	GENMASK(26, 19)
+#define RDES2_HASH_VALUE_MATCH_MASK	GENMASK(26, 19)
+#define RDES2_L3_FILTER_MATCH		BIT(27)
+#define RDES2_L4_FILTER_MATCH		BIT(28)
+#define RDES2_L3_L4_FILT_NB_MATCH_MASK	GENMASK(27, 26)
+#define RDES2_L3_L4_FILT_NB_MATCH_SHIFT	26
+
+/* RDES3 (write back format) */
+#define RDES3_PACKET_SIZE_MASK		GENMASK(14, 0)
+#define RDES3_ERROR_SUMMARY		BIT(15)
+#define RDES3_PACKET_LEN_TYPE_MASK	GENMASK(18, 16)
+#define RDES3_DRIBBLE_ERROR		BIT(19)
+#define RDES3_RECEIVE_ERROR		BIT(20)
+#define RDES3_OVERFLOW_ERROR		BIT(21)
+#define RDES3_RECEIVE_WATCHDOG		BIT(22)
+#define RDES3_GIANT_PACKET		BIT(23)
+#define RDES3_CRC_ERROR			BIT(24)
+#define RDES3_RDES0_VALID		BIT(25)
+#define RDES3_RDES1_VALID		BIT(26)
+#define RDES3_RDES2_VALID		BIT(27)
+#define RDES3_LAST_DESCRIPTOR		BIT(28)
+#define RDES3_FIRST_DESCRIPTOR		BIT(29)
+#define RDES3_CONTEXT_DESCRIPTOR	BIT(30)
+
+/* RDES3 (read format) */
+#define RDES3_BUFFER1_VALID_ADDR	BIT(24)
+#define RDES3_BUFFER2_VALID_ADDR	BIT(25)
+#define RDES3_INT_ON_COMPLETION_EN	BIT(30)
+
+/* TDS3 use for both format (read and write back) */
+#define RDES3_OWN			BIT(31)
+
+#endif /* __DWMAC4_DESCS_H__ */

drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h

+/*
+ * DWMAC4 DMA Header file.
+ *
+ *
+ * Copyright (C) 2007-2015  STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#ifndef __DWMAC4_DMA_H__
+#define __DWMAC4_DMA_H__
+
+/* Define the max channel number used for tx (also rx).
+ * dwmac4 accepts up to 8 channels for TX (and also 8 channels for RX
+ */
+#define DMA_CHANNEL_NB_MAX		1
+
+#define DMA_BUS_MODE			0x00001000
+#define DMA_SYS_BUS_MODE		0x00001004
+#define DMA_STATUS			0x00001008
+#define DMA_DEBUG_STATUS_0		0x0000100c
+#define DMA_DEBUG_STATUS_1		0x00001010
+#define DMA_DEBUG_STATUS_2		0x00001014
+#define DMA_AXI_BUS_MODE		0x00001028
+
+/* DMA Bus Mode bitmap */
+#define DMA_BUS_MODE_SFT_RESET		BIT(0)
+
+/* DMA SYS Bus Mode bitmap */
+#define DMA_BUS_MODE_SPH		BIT(24)
+#define DMA_BUS_MODE_PBL		BIT(16)
+#define DMA_BUS_MODE_PBL_SHIFT		16
+#define DMA_BUS_MODE_RPBL_SHIFT		16
+#define DMA_BUS_MODE_MB			BIT(14)
+#define DMA_BUS_MODE_FB			BIT(0)
+
+/* DMA Interrupt top status */
+#define DMA_STATUS_MAC			BIT(17)
+#define DMA_STATUS_MTL			BIT(16)
+#define DMA_STATUS_CHAN7		BIT(7)
+#define DMA_STATUS_CHAN6		BIT(6)
+#define DMA_STATUS_CHAN5		BIT(5)
+#define DMA_STATUS_CHAN4		BIT(4)
+#define DMA_STATUS_CHAN3		BIT(3)
+#define DMA_STATUS_CHAN2		BIT(2)
+#define DMA_STATUS_CHAN1		BIT(1)
+#define DMA_STATUS_CHAN0		BIT(0)
+
+/* DMA debug status bitmap */
+#define DMA_DEBUG_STATUS_TS_MASK	0xf
+#define DMA_DEBUG_STATUS_RS_MASK	0xf
+
+/* DMA AXI bitmap */
+#define DMA_AXI_EN_LPI			BIT(31)
+#define DMA_AXI_LPI_XIT_FRM		BIT(30)
+#define DMA_AXI_WR_OSR_LMT		GENMASK(27, 24)
+#define DMA_AXI_WR_OSR_LMT_SHIFT	24
+#define DMA_AXI_RD_OSR_LMT		GENMASK(19, 16)
+#define DMA_AXI_RD_OSR_LMT_SHIFT	16
+
+#define DMA_AXI_OSR_MAX			0xf
+#define DMA_AXI_MAX_OSR_LIMIT ((DMA_AXI_OSR_MAX << DMA_AXI_WR_OSR_LMT_SHIFT) | \
+				(DMA_AXI_OSR_MAX << DMA_AXI_RD_OSR_LMT_SHIFT))
+
+#define DMA_SYS_BUS_MB			BIT(14)
+#define DMA_AXI_1KBBE			BIT(13)
+#define DMA_SYS_BUS_AAL			BIT(12)
+#define DMA_AXI_BLEN256			BIT(7)
+#define DMA_AXI_BLEN128			BIT(6)
+#define DMA_AXI_BLEN64			BIT(5)
+#define DMA_AXI_BLEN32			BIT(4)
+#define DMA_AXI_BLEN16			BIT(3)
+#define DMA_AXI_BLEN8			BIT(2)
+#define DMA_AXI_BLEN4			BIT(1)
+#define DMA_SYS_BUS_FB			BIT(0)
+
+#define DMA_BURST_LEN_DEFAULT		(DMA_AXI_BLEN256 | DMA_AXI_BLEN128 | \
+					DMA_AXI_BLEN64 | DMA_AXI_BLEN32 | \
+					DMA_AXI_BLEN16 | DMA_AXI_BLEN8 | \
+					DMA_AXI_BLEN4)
+
+#define DMA_AXI_BURST_LEN_MASK		0x000000FE
+
+/* Following DMA defines are chanels oriented */
+#define DMA_CHAN_BASE_ADDR		0x00001100
+#define DMA_CHAN_BASE_OFFSET		0x80
+#define DMA_CHANX_BASE_ADDR(x)		(DMA_CHAN_BASE_ADDR + \
+					(x * DMA_CHAN_BASE_OFFSET))
+#define DMA_CHAN_REG_NUMBER		17
+
+#define DMA_CHAN_CONTROL(x)		DMA_CHANX_BASE_ADDR(x)
+#define DMA_CHAN_TX_CONTROL(x)		(DMA_CHANX_BASE_ADDR(x) + 0x4)
+#define DMA_CHAN_RX_CONTROL(x)		(DMA_CHANX_BASE_ADDR(x) + 0x8)
+#define DMA_CHAN_TX_BASE_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x14)
+#define DMA_CHAN_RX_BASE_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x1c)
+#define DMA_CHAN_TX_END_ADDR(x)		(DMA_CHANX_BASE_ADDR(x) + 0x20)
+#define DMA_CHAN_RX_END_ADDR(x)		(DMA_CHANX_BASE_ADDR(x) + 0x28)
+#define DMA_CHAN_TX_RING_LEN(x)		(DMA_CHANX_BASE_ADDR(x) + 0x2c)
+#define DMA_CHAN_RX_RING_LEN(x)		(DMA_CHANX_BASE_ADDR(x) + 0x30)
+#define DMA_CHAN_INTR_ENA(x)		(DMA_CHANX_BASE_ADDR(x) + 0x34)
+#define DMA_CHAN_RX_WATCHDOG(x)		(DMA_CHANX_BASE_ADDR(x) + 0x38)
+#define DMA_CHAN_SLOT_CTRL_STATUS(x)	(DMA_CHANX_BASE_ADDR(x) + 0x3c)
+#define DMA_CHAN_CUR_TX_DESC(x)		(DMA_CHANX_BASE_ADDR(x) + 0x44)
+#define DMA_CHAN_CUR_RX_DESC(x)		(DMA_CHANX_BASE_ADDR(x) + 0x4c)
+#define DMA_CHAN_CUR_TX_BUF_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x54)
+#define DMA_CHAN_CUR_RX_BUF_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x5c)
+#define DMA_CHAN_STATUS(x)		(DMA_CHANX_BASE_ADDR(x) + 0x60)
+
+/* DMA Control X */
+#define DMA_CONTROL_MSS_MASK		GENMASK(13, 0)
+
+/* DMA Tx Channel X Control register defines */
+#define DMA_CONTROL_TSE			BIT(12)
+#define DMA_CONTROL_OSP			BIT(4)
+#define DMA_CONTROL_ST			BIT(0)
+
+/* DMA Rx Channel X Control register defines */
+#define DMA_CONTROL_SR			BIT(0)
+
+/* Interrupt status per channel */
+#define DMA_CHAN_STATUS_REB		GENMASK(21, 19)
+#define DMA_CHAN_STATUS_REB_SHIFT	19
+#define DMA_CHAN_STATUS_TEB		GENMASK(18, 16)
+#define DMA_CHAN_STATUS_TEB_SHIFT	16
+#define DMA_CHAN_STATUS_NIS		BIT(15)
+#define DMA_CHAN_STATUS_AIS		BIT(14)
+#define DMA_CHAN_STATUS_CDE		BIT(13)
+#define DMA_CHAN_STATUS_FBE		BIT(12)
+#define DMA_CHAN_STATUS_ERI		BIT(11)
+#define DMA_CHAN_STATUS_ETI		BIT(10)
+#define DMA_CHAN_STATUS_RWT		BIT(9)
+#define DMA_CHAN_STATUS_RPS		BIT(8)
+#define DMA_CHAN_STATUS_RBU		BIT(7)
+#define DMA_CHAN_STATUS_RI		BIT(6)
+#define DMA_CHAN_STATUS_TBU		BIT(2)
+#define DMA_CHAN_STATUS_TPS		BIT(1)
+#define DMA_CHAN_STATUS_TI		BIT(0)
+
+/* Interrupt enable bits per channel */
+#define DMA_CHAN_INTR_ENA_NIE		BIT(16)
+#define DMA_CHAN_INTR_ENA_AIE		BIT(15)
+#define DMA_CHAN_INTR_ENA_NIE_4_10	BIT(15)
+#define DMA_CHAN_INTR_ENA_AIE_4_10	BIT(14)
+#define DMA_CHAN_INTR_ENA_CDE		BIT(13)
+#define DMA_CHAN_INTR_ENA_FBE		BIT(12)
+#define DMA_CHAN_INTR_ENA_ERE		BIT(11)
+#define DMA_CHAN_INTR_ENA_ETE		BIT(10)
+#define DMA_CHAN_INTR_ENA_RWE		BIT(9)
+#define DMA_CHAN_INTR_ENA_RSE		BIT(8)
+#define DMA_CHAN_INTR_ENA_RBUE		BIT(7)
+#define DMA_CHAN_INTR_ENA_RIE		BIT(6)
+#define DMA_CHAN_INTR_ENA_TBUE		BIT(2)
+#define DMA_CHAN_INTR_ENA_TSE		BIT(1)
+#define DMA_CHAN_INTR_ENA_TIE		BIT(0)
+
+#define DMA_CHAN_INTR_NORMAL		(DMA_CHAN_INTR_ENA_NIE | \
+					 DMA_CHAN_INTR_ENA_RIE | \
+					 DMA_CHAN_INTR_ENA_TIE)
+
+#define DMA_CHAN_INTR_ABNORMAL		(DMA_CHAN_INTR_ENA_AIE | \
+					 DMA_CHAN_INTR_ENA_FBE)
+/* DMA default interrupt mask for 4.00 */
+#define DMA_CHAN_INTR_DEFAULT_MASK	(DMA_CHAN_INTR_NORMAL | \
+					 DMA_CHAN_INTR_ABNORMAL)
+
+#define DMA_CHAN_INTR_NORMAL_4_10	(DMA_CHAN_INTR_ENA_NIE_4_10 | \
+					 DMA_CHAN_INTR_ENA_RIE | \
+					 DMA_CHAN_INTR_ENA_TIE)
+
+#define DMA_CHAN_INTR_ABNORMAL_4_10	(DMA_CHAN_INTR_ENA_AIE_4_10 | \
+					 DMA_CHAN_INTR_ENA_FBE)
+/* DMA default interrupt mask for 4.10a */
+#define DMA_CHAN_INTR_DEFAULT_MASK_4_10	(DMA_CHAN_INTR_NORMAL_4_10 | \
+					 DMA_CHAN_INTR_ABNORMAL_4_10)
+
+/* channel 0 specific fields */
+#define DMA_CHAN0_DBG_STAT_TPS		GENMASK(15, 12)
+#define DMA_CHAN0_DBG_STAT_TPS_SHIFT	12
+#define DMA_CHAN0_DBG_STAT_RPS		GENMASK(11, 8)
+#define DMA_CHAN0_DBG_STAT_RPS_SHIFT	8
+
+int dwmac4_dma_reset(void __iomem *ioaddr);
+void dwmac4_enable_dma_transmission(void __iomem *ioaddr, u32 tail_ptr);
+void dwmac4_enable_dma_irq(void __iomem *ioaddr);
+void dwmac410_enable_dma_irq(void __iomem *ioaddr);
+void dwmac4_disable_dma_irq(void __iomem *ioaddr);
+void dwmac4_dma_start_tx(void __iomem *ioaddr);
+void dwmac4_dma_stop_tx(void __iomem *ioaddr);
+void dwmac4_dma_start_rx(void __iomem *ioaddr);
+void dwmac4_dma_stop_rx(void __iomem *ioaddr);
+int dwmac4_dma_interrupt(void __iomem *ioaddr,
+			 struct stmmac_extra_stats *x);
+void dwmac4_set_rx_ring_len(void __iomem *ioaddr, u32 len);
+void dwmac4_set_tx_ring_len(void __iomem *ioaddr, u32 len);
+void dwmac4_set_rx_tail_ptr(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
+void dwmac4_set_tx_tail_ptr(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
+
+#endif /* __DWMAC4_DMA_H__ */

drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c

+/*
+ * Copyright (C) 2007-2015  STMicroelectronics Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * Author: Alexandre Torgue <alexandre.torgue@st.com>
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include "common.h"
+#include "dwmac4_dma.h"
+#include "dwmac4.h"
+
+int dwmac4_dma_reset(void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr + DMA_BUS_MODE);
+	int limit;
+
+	/* DMA SW reset */
+	value |= DMA_BUS_MODE_SFT_RESET;
+	writel(value, ioaddr + DMA_BUS_MODE);
+	limit = 10;
+	while (limit--) {
+		if (!(readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
+			break;
+		mdelay(10);
+	}
+
+	if (limit < 0)
+		return -EBUSY;
+
+	return 0;
+}
+
+void dwmac4_set_rx_tail_ptr(void __iomem *ioaddr, u32 tail_ptr, u32 chan)
+{
+	writel(tail_ptr, ioaddr + DMA_CHAN_RX_END_ADDR(0));
+}
+
+void dwmac4_set_tx_tail_ptr(void __iomem *ioaddr, u32 tail_ptr, u32 chan)
+{
+	writel(tail_ptr, ioaddr + DMA_CHAN_TX_END_ADDR(0));
+}
+
+void dwmac4_dma_start_tx(void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(STMMAC_CHAN0));
+
+	value |= DMA_CONTROL_ST;
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(STMMAC_CHAN0));
+
+	value = readl(ioaddr + GMAC_CONFIG);
+	value |= GMAC_CONFIG_TE;
+	writel(value, ioaddr + GMAC_CONFIG);
+}
+
+void dwmac4_dma_stop_tx(void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(STMMAC_CHAN0));
+
+	value &= ~DMA_CONTROL_ST;
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(STMMAC_CHAN0));
+
+	value = readl(ioaddr + GMAC_CONFIG);
+	value &= ~GMAC_CONFIG_TE;
+	writel(value, ioaddr + GMAC_CONFIG);
+}
+
+void dwmac4_dma_start_rx(void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(STMMAC_CHAN0));
+
+	value |= DMA_CONTROL_SR;
+
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(STMMAC_CHAN0));
+
+	value = readl(ioaddr + GMAC_CONFIG);
+	value |= GMAC_CONFIG_RE;
+	writel(value, ioaddr + GMAC_CONFIG);
+}
+
+void dwmac4_dma_stop_rx(void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(STMMAC_CHAN0));
+
+	value &= ~DMA_CONTROL_SR;
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(STMMAC_CHAN0));
+
+	value = readl(ioaddr + GMAC_CONFIG);
+	value &= ~GMAC_CONFIG_RE;
+	writel(value, ioaddr + GMAC_CONFIG);
+}
+
+void dwmac4_set_tx_ring_len(void __iomem *ioaddr, u32 len)
+{
+	writel(len, ioaddr + DMA_CHAN_TX_RING_LEN(STMMAC_CHAN0));
+}
+
+void dwmac4_set_rx_ring_len(void __iomem *ioaddr, u32 len)
+{
+	writel(len, ioaddr + DMA_CHAN_RX_RING_LEN(STMMAC_CHAN0));
+}
+
+void dwmac4_enable_dma_irq(void __iomem *ioaddr)
+{
+	writel(DMA_CHAN_INTR_DEFAULT_MASK, ioaddr +
+	       DMA_CHAN_INTR_ENA(STMMAC_CHAN0));
+}
+
+void dwmac410_enable_dma_irq(void __iomem *ioaddr)
+{
+	writel(DMA_CHAN_INTR_DEFAULT_MASK_4_10,
+	       ioaddr + DMA_CHAN_INTR_ENA(STMMAC_CHAN0));
+}
+
+void dwmac4_disable_dma_irq(void __iomem *ioaddr)
+{
+	writel(0, ioaddr + DMA_CHAN_INTR_ENA(STMMAC_CHAN0));
+}
+
+int dwmac4_dma_interrupt(void __iomem *ioaddr,
+			 struct stmmac_extra_stats *x)
+{
+	int ret = 0;
+
+	u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(0));
+
+	/* ABNORMAL interrupts */
+	if (unlikely(intr_status & DMA_CHAN_STATUS_AIS)) {
+		if (unlikely(intr_status & DMA_CHAN_STATUS_RBU))
+			x->rx_buf_unav_irq++;
+		if (unlikely(intr_status & DMA_CHAN_STATUS_RPS))
+			x->rx_process_stopped_irq++;
+		if (unlikely(intr_status & DMA_CHAN_STATUS_RWT))
+			x->rx_watchdog_irq++;
+		if (unlikely(intr_status & DMA_CHAN_STATUS_ETI))
+			x->tx_early_irq++;
+		if (unlikely(intr_status & DMA_CHAN_STATUS_TPS)) {
+			x->tx_process_stopped_irq++;
+			ret = tx_hard_error;
+		}
+		if (unlikely(intr_status & DMA_CHAN_STATUS_FBE)) {
+			x->fatal_bus_error_irq++;
+			ret = tx_hard_error;
+		}
+	}
+	/* TX/RX NORMAL interrupts */
+	if (likely(intr_status & DMA_CHAN_STATUS_NIS)) {
+		x->normal_irq_n++;
+		if (likely(intr_status & DMA_CHAN_STATUS_RI)) {
+			u32 value;
+
+			value = readl(ioaddr + DMA_CHAN_INTR_ENA(STMMAC_CHAN0));
+			/* to schedule NAPI on real RIE event. */
+			if (likely(value & DMA_CHAN_INTR_ENA_RIE)) {
+				x->rx_normal_irq_n++;
+				ret |= handle_rx;
+			}
+		}
+		if (likely(intr_status & DMA_CHAN_STATUS_TI)) {
+			x->tx_normal_irq_n++;
+			ret |= handle_tx;
+		}
+		if (unlikely(intr_status & DMA_CHAN_STATUS_ERI))
+			x->rx_early_irq++;
+	}
+
+	/* Clear the interrupt by writing a logic 1 to the chanX interrupt
+	 * status [21-0] expect reserved bits [5-3]
+	 */
+	writel((intr_status & 0x3fffc7),
+	       ioaddr + DMA_CHAN_STATUS(STMMAC_CHAN0));
+
+	return ret;
+}
+
+void stmmac_dwmac4_set_mac_addr(void __iomem *ioaddr, u8 addr[6],
+				unsigned int high, unsigned int low)
+{
+	unsigned long data;
+
+	data = (addr[5] << 8) | addr[4];
+	/* For MAC Addr registers se have to set the Address Enable (AE)
+	 * bit that has no effect on the High Reg 0 where the bit 31 (MO)
+	 * is RO.
+	 */
+	data |= (STMMAC_CHAN0 << GMAC_HI_DCS_SHIFT);
+	writel(data | GMAC_HI_REG_AE, ioaddr + high);
+	data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
+	writel(data, ioaddr + low);
+}
+
+/* Enable disable MAC RX/TX */
+void stmmac_dwmac4_set_mac(void __iomem *ioaddr, bool enable)
+{
+	u32 value = readl(ioaddr + GMAC_CONFIG);
+
+	if (enable)
+		value |= GMAC_CONFIG_RE | GMAC_CONFIG_TE;
+	else
+		value &= ~(GMAC_CONFIG_TE | GMAC_CONFIG_RE);
+
+	writel(value, ioaddr + GMAC_CONFIG);
+}
+
+void stmmac_dwmac4_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
+				unsigned int high, unsigned int low)
+{
+	unsigned int hi_addr, lo_addr;
+
+	/* Read the MAC address from the hardware */
+	hi_addr = readl(ioaddr + high);
+	lo_addr = readl(ioaddr + low);
+
+	/* Extract the MAC address from the high and low words */
+	addr[0] = lo_addr & 0xff;
+	addr[1] = (lo_addr >> 8) & 0xff;
+	addr[2] = (lo_addr >> 16) & 0xff;
+	addr[3] = (lo_addr >> 24) & 0xff;
+	addr[4] = hi_addr & 0xff;
+	addr[5] = (hi_addr >> 8) & 0xff;
+}

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

@@ -411,6 +411,26 @@ static int enh_desc_get_rx_timestamp_status(void *desc, u32 ats)
 	}
 }
 
+static void enh_desc_display_ring(void *head, unsigned int size, bool rx)
+{
+	struct dma_extended_desc *ep = (struct dma_extended_desc *)head;
+	int i;
+
+	pr_info("Extended %s descriptor ring:\n", rx ? "RX" : "TX");
+
+	for (i = 0; i < size; i++) {
+		u64 x;
+
+		x = *(u64 *)ep;
+		pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
+			i, (unsigned int)virt_to_phys(ep),
+			(unsigned int)x, (unsigned int)(x >> 32),
+			ep->basic.des2, ep->basic.des3);
+		ep++;
+	}
+	pr_info("\n");
+}
+
 const struct stmmac_desc_ops enh_desc_ops = {
 	.tx_status = enh_desc_get_tx_status,
 	.rx_status = enh_desc_get_rx_status,
@@ -430,4 +450,5 @@ const struct stmmac_desc_ops enh_desc_ops = {
 	.get_tx_timestamp_status = enh_desc_get_tx_timestamp_status,
 	.get_timestamp = enh_desc_get_timestamp,
 	.get_rx_timestamp_status = enh_desc_get_rx_timestamp_status,
+	.display_ring = enh_desc_display_ring,
 };

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

@@ -35,6 +35,10 @@
 						 * current value.*/
 #define MMC_CNTRL_PRESET		0x10
 #define MMC_CNTRL_FULL_HALF_PRESET	0x20
+
+#define MMC_GMAC4_OFFSET		0x700
+#define MMC_GMAC3_X_OFFSET		0x100
+
 struct stmmac_counters {
 	unsigned int mmc_tx_octetcount_gb;
 	unsigned int mmc_tx_framecount_gb;

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

@@ -279,6 +279,26 @@ static int ndesc_get_rx_timestamp_status(void *desc, u32 ats)
 		return 1;
 }
 
+static void ndesc_display_ring(void *head, unsigned int size, bool rx)
+{
+	struct dma_desc *p = (struct dma_desc *)head;
+	int i;
+
+	pr_info("%s descriptor ring:\n", rx ? "RX" : "TX");
+
+	for (i = 0; i < size; i++) {
+		u64 x;
+
+		x = *(u64 *)p;
+		pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x",
+			i, (unsigned int)virt_to_phys(p),
+			(unsigned int)x, (unsigned int)(x >> 32),
+			p->des2, p->des3);
+		p++;
+	}
+	pr_info("\n");
+}
+
 const struct stmmac_desc_ops ndesc_ops = {
 	.tx_status = ndesc_get_tx_status,
 	.rx_status = ndesc_get_rx_status,
@@ -297,4 +317,5 @@ const struct stmmac_desc_ops ndesc_ops = {
 	.get_tx_timestamp_status = ndesc_get_tx_timestamp_status,
 	.get_timestamp = ndesc_get_timestamp,
 	.get_rx_timestamp_status = ndesc_get_rx_timestamp_status,
+	.display_ring = ndesc_display_ring,
 };

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

@@ -24,7 +24,7 @@
 #define __STMMAC_H__
 
 #define STMMAC_RESOURCE_NAME   "stmmaceth"
-#define DRV_MODULE_VERSION	"Oct_2015"
+#define DRV_MODULE_VERSION	"Jan_2016"
 
 #include <linux/clk.h>
 #include <linux/stmmac.h>
@@ -67,6 +67,7 @@ struct stmmac_priv {
 	spinlock_t tx_lock;
 	bool tx_path_in_lpi_mode;
 	struct timer_list txtimer;
+	bool tso;
 
 	struct dma_desc *dma_rx	____cacheline_aligned_in_smp;
 	struct dma_extended_desc *dma_erx;
@@ -128,6 +129,10 @@ struct stmmac_priv {
 	int use_riwt;
 	int irq_wake;
 	spinlock_t ptp_lock;
+	void __iomem *mmcaddr;
+	u32 rx_tail_addr;
+	u32 tx_tail_addr;
+	u32 mss;
 
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *dbgfs_dir;

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

@@ -161,6 +161,9 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
 	STMMAC_STAT(mtl_rx_fifo_ctrl_active),
 	STMMAC_STAT(mac_rx_frame_ctrl_fifo),
 	STMMAC_STAT(mac_gmii_rx_proto_engine),
+	/* TSO */
+	STMMAC_STAT(tx_tso_frames),
+	STMMAC_STAT(tx_tso_nfrags),
 };
 #define STMMAC_STATS_LEN ARRAY_SIZE(stmmac_gstrings_stats)
 
@@ -499,14 +502,14 @@ static void stmmac_get_ethtool_stats(struct net_device *dev,
 	int i, j = 0;
 
 	/* Update the DMA HW counters for dwmac10/100 */
-	if (!priv->plat->has_gmac)
+	if (priv->hw->dma->dma_diagnostic_fr)
 		priv->hw->dma->dma_diagnostic_fr(&dev->stats,
 						 (void *) &priv->xstats,
 						 priv->ioaddr);
 	else {
 		/* If supported, for new GMAC chips expose the MMC counters */
 		if (priv->dma_cap.rmon) {
-			dwmac_mmc_read(priv->ioaddr, &priv->mmc);
+			dwmac_mmc_read(priv->mmcaddr, &priv->mmc);
 
 			for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) {
 				char *p;

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

@@ -284,6 +284,13 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 		plat->pmt = 1;
 	}
 
+	if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
+	    of_device_is_compatible(np, "snps,dwmac-4.10a")) {
+		plat->has_gmac4 = 1;
+		plat->pmt = 1;
+		plat->tso_en = of_property_read_bool(np, "snps,tso");
+	}
+
 	if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
 		of_device_is_compatible(np, "snps,dwmac-3.710")) {
 		plat->enh_desc = 1;

include/linux/stmmac.h

@@ -137,5 +137,7 @@ struct plat_stmmacenet_data {
 	void (*exit)(struct platform_device *pdev, void *priv);
 	void *bsp_priv;
 	struct stmmac_axi *axi;
+	int has_gmac4;
+	bool tso_en;
 };
 #endif