Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 1736 insertions, 0 deletions

diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
new file mode 100644
index 0000000..111e7ca
--- /dev/null
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -0,0 +1,1736 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * sni_ave.c - Socionext UniPhier AVE ethernet driver
+ * Copyright 2014 Panasonic Corporation
+ * Copyright 2015-2017 Socionext Inc.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/reset.h>
+#include <linux/types.h>
+#include <linux/u64_stats_sync.h>
+
+/* General Register Group */
+#define AVE_IDR			0x000	/* ID */
+#define AVE_VR			0x004	/* Version */
+#define AVE_GRR			0x008	/* Global Reset */
+#define AVE_CFGR		0x00c	/* Configuration */
+
+/* Interrupt Register Group */
+#define AVE_GIMR		0x100	/* Global Interrupt Mask */
+#define AVE_GISR		0x104	/* Global Interrupt Status */
+
+/* MAC Register Group */
+#define AVE_TXCR		0x200	/* TX Setup */
+#define AVE_RXCR		0x204	/* RX Setup */
+#define AVE_RXMAC1R		0x208	/* MAC address (lower) */
+#define AVE_RXMAC2R		0x20c	/* MAC address (upper) */
+#define AVE_MDIOCTR		0x214	/* MDIO Control */
+#define AVE_MDIOAR		0x218	/* MDIO Address */
+#define AVE_MDIOWDR		0x21c	/* MDIO Data */
+#define AVE_MDIOSR		0x220	/* MDIO Status */
+#define AVE_MDIORDR		0x224	/* MDIO Rd Data */
+
+/* Descriptor Control Register Group */
+#define AVE_DESCC		0x300	/* Descriptor Control */
+#define AVE_TXDC		0x304	/* TX Descriptor Configuration */
+#define AVE_RXDC0		0x308	/* RX Descriptor Ring0 Configuration */
+#define AVE_IIRQC		0x34c	/* Interval IRQ Control */
+
+/* Packet Filter Register Group */
+#define AVE_PKTF_BASE		0x800	/* PF Base Address */
+#define AVE_PFMBYTE_BASE	0xd00	/* PF Mask Byte Base Address */
+#define AVE_PFMBIT_BASE		0xe00	/* PF Mask Bit Base Address */
+#define AVE_PFSEL_BASE		0xf00	/* PF Selector Base Address */
+#define AVE_PFEN		0xffc	/* Packet Filter Enable */
+#define AVE_PKTF(ent)		(AVE_PKTF_BASE + (ent) * 0x40)
+#define AVE_PFMBYTE(ent)	(AVE_PFMBYTE_BASE + (ent) * 8)
+#define AVE_PFMBIT(ent)		(AVE_PFMBIT_BASE + (ent) * 4)
+#define AVE_PFSEL(ent)		(AVE_PFSEL_BASE + (ent) * 4)
+
+/* 64bit descriptor memory */
+#define AVE_DESC_SIZE_64	12	/* Descriptor Size */
+
+#define AVE_TXDM_64		0x1000	/* Tx Descriptor Memory */
+#define AVE_RXDM_64		0x1c00	/* Rx Descriptor Memory */
+
+#define AVE_TXDM_SIZE_64	0x0ba0	/* Tx Descriptor Memory Size 3KB */
+#define AVE_RXDM_SIZE_64	0x6000	/* Rx Descriptor Memory Size 24KB */
+
+/* 32bit descriptor memory */
+#define AVE_DESC_SIZE_32	8	/* Descriptor Size */
+
+#define AVE_TXDM_32		0x1000	/* Tx Descriptor Memory */
+#define AVE_RXDM_32		0x1800	/* Rx Descriptor Memory */
+
+#define AVE_TXDM_SIZE_32	0x07c0	/* Tx Descriptor Memory Size 2KB */
+#define AVE_RXDM_SIZE_32	0x4000	/* Rx Descriptor Memory Size 16KB */
+
+/* RMII Bridge Register Group */
+#define AVE_RSTCTRL		0x8028	/* Reset control */
+#define AVE_RSTCTRL_RMIIRST	BIT(16)
+#define AVE_LINKSEL		0x8034	/* Link speed setting */
+#define AVE_LINKSEL_100M	BIT(0)
+
+/* AVE_GRR */
+#define AVE_GRR_RXFFR		BIT(5)	/* Reset RxFIFO */
+#define AVE_GRR_PHYRST		BIT(4)	/* Reset external PHY */
+#define AVE_GRR_GRST		BIT(0)	/* Reset all MAC */
+
+/* AVE_CFGR */
+#define AVE_CFGR_FLE		BIT(31)	/* Filter Function */
+#define AVE_CFGR_CHE		BIT(30)	/* Checksum Function */
+#define AVE_CFGR_MII		BIT(27)	/* Func mode (1:MII/RMII, 0:RGMII) */
+#define AVE_CFGR_IPFCEN		BIT(24)	/* IP fragment sum Enable */
+
+/* AVE_GISR (common with GIMR) */
+#define AVE_GI_PHY		BIT(24)	/* PHY interrupt */
+#define AVE_GI_TX		BIT(16)	/* Tx complete */
+#define AVE_GI_RXERR		BIT(8)	/* Receive frame more than max size */
+#define AVE_GI_RXOVF		BIT(7)	/* Overflow at the RxFIFO */
+#define AVE_GI_RXDROP		BIT(6)	/* Drop packet */
+#define AVE_GI_RXIINT		BIT(5)	/* Interval interrupt */
+
+/* AVE_TXCR */
+#define AVE_TXCR_FLOCTR		BIT(18)	/* Flow control */
+#define AVE_TXCR_TXSPD_1G	BIT(17)
+#define AVE_TXCR_TXSPD_100	BIT(16)
+
+/* AVE_RXCR */
+#define AVE_RXCR_RXEN		BIT(30)	/* Rx enable */
+#define AVE_RXCR_FDUPEN		BIT(22)	/* Interface mode */
+#define AVE_RXCR_FLOCTR		BIT(21)	/* Flow control */
+#define AVE_RXCR_AFEN		BIT(19)	/* MAC address filter */
+#define AVE_RXCR_DRPEN		BIT(18)	/* Drop pause frame */
+#define AVE_RXCR_MPSIZ_MASK	GENMASK(10, 0)
+
+/* AVE_MDIOCTR */
+#define AVE_MDIOCTR_RREQ	BIT(3)	/* Read request */
+#define AVE_MDIOCTR_WREQ	BIT(2)	/* Write request */
+
+/* AVE_MDIOSR */
+#define AVE_MDIOSR_STS		BIT(0)	/* access status */
+
+/* AVE_DESCC */
+#define AVE_DESCC_STATUS_MASK	GENMASK(31, 16)
+#define AVE_DESCC_RD0		BIT(8)	/* Enable Rx descriptor Ring0 */
+#define AVE_DESCC_RDSTP		BIT(4)	/* Pause Rx descriptor */
+#define AVE_DESCC_TD		BIT(0)	/* Enable Tx descriptor */
+
+/* AVE_TXDC */
+#define AVE_TXDC_SIZE		GENMASK(27, 16)	/* Size of Tx descriptor */
+#define AVE_TXDC_ADDR		GENMASK(11, 0)	/* Start address */
+#define AVE_TXDC_ADDR_START	0
+
+/* AVE_RXDC0 */
+#define AVE_RXDC0_SIZE		GENMASK(30, 16)	/* Size of Rx descriptor */
+#define AVE_RXDC0_ADDR		GENMASK(14, 0)	/* Start address */
+#define AVE_RXDC0_ADDR_START	0
+
+/* AVE_IIRQC */
+#define AVE_IIRQC_EN0		BIT(27)	/* Enable interval interrupt Ring0 */
+#define AVE_IIRQC_BSCK		GENMASK(15, 0)	/* Interval count unit */
+
+/* Command status for descriptor */
+#define AVE_STS_OWN		BIT(31)	/* Descriptor ownership */
+#define AVE_STS_INTR		BIT(29)	/* Request for interrupt */
+#define AVE_STS_OK		BIT(27)	/* Normal transmit */
+/* TX */
+#define AVE_STS_NOCSUM		BIT(28)	/* No use HW checksum */
+#define AVE_STS_1ST		BIT(26)	/* Head of buffer chain */
+#define AVE_STS_LAST		BIT(25)	/* Tail of buffer chain */
+#define AVE_STS_OWC		BIT(21)	/* Out of window,Late Collision */
+#define AVE_STS_EC		BIT(20)	/* Excess collision occurred */
+#define AVE_STS_PKTLEN_TX_MASK	GENMASK(15, 0)
+/* RX */
+#define AVE_STS_CSSV		BIT(21)	/* Checksum check performed */
+#define AVE_STS_CSER		BIT(20)	/* Checksum error detected */
+#define AVE_STS_PKTLEN_RX_MASK	GENMASK(10, 0)
+
+/* Packet filter */
+#define AVE_PFMBYTE_MASK0	(GENMASK(31, 8) | GENMASK(5, 0))
+#define AVE_PFMBYTE_MASK1	GENMASK(25, 0)
+#define AVE_PFMBIT_MASK		GENMASK(15, 0)
+
+#define AVE_PF_SIZE		17	/* Number of all packet filter */
+#define AVE_PF_MULTICAST_SIZE	7	/* Number of multicast filter */
+
+#define AVE_PFNUM_FILTER	0	/* No.0 */
+#define AVE_PFNUM_UNICAST	1	/* No.1 */
+#define AVE_PFNUM_BROADCAST	2	/* No.2 */
+#define AVE_PFNUM_MULTICAST	11	/* No.11-17 */
+
+/* NETIF Message control */
+#define AVE_DEFAULT_MSG_ENABLE	(NETIF_MSG_DRV    |	\
+				 NETIF_MSG_PROBE  |	\
+				 NETIF_MSG_LINK   |	\
+				 NETIF_MSG_TIMER  |	\
+				 NETIF_MSG_IFDOWN |	\
+				 NETIF_MSG_IFUP   |	\
+				 NETIF_MSG_RX_ERR |	\
+				 NETIF_MSG_TX_ERR)
+
+/* Parameter for descriptor */
+#define AVE_NR_TXDESC		32	/* Tx descriptor */
+#define AVE_NR_RXDESC		64	/* Rx descriptor */
+
+#define AVE_DESC_OFS_CMDSTS	0
+#define AVE_DESC_OFS_ADDRL	4
+#define AVE_DESC_OFS_ADDRU	8
+
+/* Parameter for ethernet frame */
+#define AVE_MAX_ETHFRAME	1518
+
+/* Parameter for interrupt */
+#define AVE_INTM_COUNT		20
+#define AVE_FORCE_TXINTCNT	1
+
+#define IS_DESC_64BIT(p)	((p)->data->is_desc_64bit)
+
+enum desc_id {
+	AVE_DESCID_RX,
+	AVE_DESCID_TX,
+};
+
+enum desc_state {
+	AVE_DESC_RX_PERMIT,
+	AVE_DESC_RX_SUSPEND,
+	AVE_DESC_START,
+	AVE_DESC_STOP,
+};
+
+struct ave_desc {
+	struct sk_buff	*skbs;
+	dma_addr_t	skbs_dma;
+	size_t		skbs_dmalen;
+};
+
+struct ave_desc_info {
+	u32	ndesc;		/* number of descriptor */
+	u32	daddr;		/* start address of descriptor */
+	u32	proc_idx;	/* index of processing packet */
+	u32	done_idx;	/* index of processed packet */
+	struct ave_desc *desc;	/* skb info related descriptor */
+};
+
+struct ave_soc_data {
+	bool	is_desc_64bit;
+};
+
+struct ave_stats {
+	struct	u64_stats_sync	syncp;
+	u64	packets;
+	u64	bytes;
+	u64	errors;
+	u64	dropped;
+	u64	collisions;
+	u64	fifo_errors;
+};
+
+struct ave_private {
+	void __iomem            *base;
+	int                     irq;
+	int			phy_id;
+	unsigned int		desc_size;
+	u32			msg_enable;
+	struct clk		*clk;
+	struct reset_control	*rst;
+	phy_interface_t		phy_mode;
+	struct phy_device	*phydev;
+	struct mii_bus		*mdio;
+
+	/* stats */
+	struct ave_stats	stats_rx;
+	struct ave_stats	stats_tx;
+
+	/* NAPI support */
+	struct net_device	*ndev;
+	struct napi_struct	napi_rx;
+	struct napi_struct	napi_tx;
+
+	/* descriptor */
+	struct ave_desc_info	rx;
+	struct ave_desc_info	tx;
+
+	/* flow control */
+	int pause_auto;
+	int pause_rx;
+	int pause_tx;
+
+	const struct ave_soc_data *data;
+};
+
+static u32 ave_desc_read(struct net_device *ndev, enum desc_id id, int entry,
+			 int offset)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 addr;
+
+	addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr)
+		+ entry * priv->desc_size + offset;
+
+	return readl(priv->base + addr);
+}
+
+static u32 ave_desc_read_cmdsts(struct net_device *ndev, enum desc_id id,
+				int entry)
+{
+	return ave_desc_read(ndev, id, entry, AVE_DESC_OFS_CMDSTS);
+}
+
+static void ave_desc_write(struct net_device *ndev, enum desc_id id,
+			   int entry, int offset, u32 val)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 addr;
+
+	addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr)
+		+ entry * priv->desc_size + offset;
+
+	writel(val, priv->base + addr);
+}
+
+static void ave_desc_write_cmdsts(struct net_device *ndev, enum desc_id id,
+				  int entry, u32 val)
+{
+	ave_desc_write(ndev, id, entry, AVE_DESC_OFS_CMDSTS, val);
+}
+
+static void ave_desc_write_addr(struct net_device *ndev, enum desc_id id,
+				int entry, dma_addr_t paddr)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	ave_desc_write(ndev, id, entry, AVE_DESC_OFS_ADDRL,
+		       lower_32_bits(paddr));
+	if (IS_DESC_64BIT(priv))
+		ave_desc_write(ndev, id,
+			       entry, AVE_DESC_OFS_ADDRU,
+			       upper_32_bits(paddr));
+}
+
+static u32 ave_irq_disable_all(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 ret;
+
+	ret = readl(priv->base + AVE_GIMR);
+	writel(0, priv->base + AVE_GIMR);
+
+	return ret;
+}
+
+static void ave_irq_restore(struct net_device *ndev, u32 val)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	writel(val, priv->base + AVE_GIMR);
+}
+
+static void ave_irq_enable(struct net_device *ndev, u32 bitflag)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	writel(readl(priv->base + AVE_GIMR) | bitflag, priv->base + AVE_GIMR);
+	writel(bitflag, priv->base + AVE_GISR);
+}
+
+static void ave_hw_write_macaddr(struct net_device *ndev,
+				 const unsigned char *mac_addr,
+				 int reg1, int reg2)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	writel(mac_addr[0] | mac_addr[1] << 8 |
+	       mac_addr[2] << 16 | mac_addr[3] << 24, priv->base + reg1);
+	writel(mac_addr[4] | mac_addr[5] << 8, priv->base + reg2);
+}
+
+static void ave_hw_read_version(struct net_device *ndev, char *buf, int len)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 major, minor, vr;
+
+	vr = readl(priv->base + AVE_VR);
+	major = (vr & GENMASK(15, 8)) >> 8;
+	minor = (vr & GENMASK(7, 0));
+	snprintf(buf, len, "v%u.%u", major, minor);
+}
+
+static void ave_ethtool_get_drvinfo(struct net_device *ndev,
+				    struct ethtool_drvinfo *info)
+{
+	struct device *dev = ndev->dev.parent;
+
+	strlcpy(info->driver, dev->driver->name, sizeof(info->driver));
+	strlcpy(info->bus_info, dev_name(dev), sizeof(info->bus_info));
+	ave_hw_read_version(ndev, info->fw_version, sizeof(info->fw_version));
+}
+
+static u32 ave_ethtool_get_msglevel(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	return priv->msg_enable;
+}
+
+static void ave_ethtool_set_msglevel(struct net_device *ndev, u32 val)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	priv->msg_enable = val;
+}
+
+static void ave_ethtool_get_wol(struct net_device *ndev,
+				struct ethtool_wolinfo *wol)
+{
+	wol->supported = 0;
+	wol->wolopts   = 0;
+
+	if (ndev->phydev)
+		phy_ethtool_get_wol(ndev->phydev, wol);
+}
+
+static int ave_ethtool_set_wol(struct net_device *ndev,
+			       struct ethtool_wolinfo *wol)
+{
+	int ret;
+
+	if (!ndev->phydev ||
+	    (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE)))
+		return -EOPNOTSUPP;
+
+	ret = phy_ethtool_set_wol(ndev->phydev, wol);
+	if (!ret)
+		device_set_wakeup_enable(&ndev->dev, !!wol->wolopts);
+
+	return ret;
+}
+
+static void ave_ethtool_get_pauseparam(struct net_device *ndev,
+				       struct ethtool_pauseparam *pause)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	pause->autoneg  = priv->pause_auto;
+	pause->rx_pause = priv->pause_rx;
+	pause->tx_pause = priv->pause_tx;
+}
+
+static int ave_ethtool_set_pauseparam(struct net_device *ndev,
+				      struct ethtool_pauseparam *pause)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	struct phy_device *phydev = ndev->phydev;
+
+	if (!phydev)
+		return -EINVAL;
+
+	priv->pause_auto = pause->autoneg;
+	priv->pause_rx   = pause->rx_pause;
+	priv->pause_tx   = pause->tx_pause;
+
+	phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
+	if (pause->rx_pause)
+		phydev->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+	if (pause->tx_pause)
+		phydev->advertising ^= ADVERTISED_Asym_Pause;
+
+	if (pause->autoneg) {
+		if (netif_running(ndev))
+			phy_start_aneg(phydev);
+	}
+
+	return 0;
+}
+
+static const struct ethtool_ops ave_ethtool_ops = {
+	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
+	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
+	.get_drvinfo		= ave_ethtool_get_drvinfo,
+	.nway_reset		= phy_ethtool_nway_reset,
+	.get_link		= ethtool_op_get_link,
+	.get_msglevel		= ave_ethtool_get_msglevel,
+	.set_msglevel		= ave_ethtool_set_msglevel,
+	.get_wol		= ave_ethtool_get_wol,
+	.set_wol		= ave_ethtool_set_wol,
+	.get_pauseparam         = ave_ethtool_get_pauseparam,
+	.set_pauseparam         = ave_ethtool_set_pauseparam,
+};
+
+static int ave_mdiobus_read(struct mii_bus *bus, int phyid, int regnum)
+{
+	struct net_device *ndev = bus->priv;
+	struct ave_private *priv;
+	u32 mdioctl, mdiosr;
+	int ret;
+
+	priv = netdev_priv(ndev);
+
+	/* write address */
+	writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR);
+
+	/* read request */
+	mdioctl = readl(priv->base + AVE_MDIOCTR);
+	writel((mdioctl | AVE_MDIOCTR_RREQ) & ~AVE_MDIOCTR_WREQ,
+	       priv->base + AVE_MDIOCTR);
+
+	ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr,
+				 !(mdiosr & AVE_MDIOSR_STS), 20, 2000);
+	if (ret) {
+		netdev_err(ndev, "failed to read (phy:%d reg:%x)\n",
+			   phyid, regnum);
+		return ret;
+	}
+
+	return readl(priv->base + AVE_MDIORDR) & GENMASK(15, 0);
+}
+
+static int ave_mdiobus_write(struct mii_bus *bus, int phyid, int regnum,
+			     u16 val)
+{
+	struct net_device *ndev = bus->priv;
+	struct ave_private *priv;
+	u32 mdioctl, mdiosr;
+	int ret;
+
+	priv = netdev_priv(ndev);
+
+	/* write address */
+	writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR);
+
+	/* write data */
+	writel(val, priv->base + AVE_MDIOWDR);
+
+	/* write request */
+	mdioctl = readl(priv->base + AVE_MDIOCTR);
+	writel((mdioctl | AVE_MDIOCTR_WREQ) & ~AVE_MDIOCTR_RREQ,
+	       priv->base + AVE_MDIOCTR);
+
+	ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr,
+				 !(mdiosr & AVE_MDIOSR_STS), 20, 2000);
+	if (ret)
+		netdev_err(ndev, "failed to write (phy:%d reg:%x)\n",
+			   phyid, regnum);
+
+	return ret;
+}
+
+static int ave_dma_map(struct net_device *ndev, struct ave_desc *desc,
+		       void *ptr, size_t len, enum dma_data_direction dir,
+		       dma_addr_t *paddr)
+{
+	dma_addr_t map_addr;
+
+	map_addr = dma_map_single(ndev->dev.parent, ptr, len, dir);
+	if (unlikely(dma_mapping_error(ndev->dev.parent, map_addr)))
+		return -ENOMEM;
+
+	desc->skbs_dma = map_addr;
+	desc->skbs_dmalen = len;
+	*paddr = map_addr;
+
+	return 0;
+}
+
+static void ave_dma_unmap(struct net_device *ndev, struct ave_desc *desc,
+			  enum dma_data_direction dir)
+{
+	if (!desc->skbs_dma)
+		return;
+
+	dma_unmap_single(ndev->dev.parent,
+			 desc->skbs_dma, desc->skbs_dmalen, dir);
+	desc->skbs_dma = 0;
+}
+
+/* Prepare Rx descriptor and memory */
+static int ave_rxdesc_prepare(struct net_device *ndev, int entry)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	struct sk_buff *skb;
+	dma_addr_t paddr;
+	int ret;
+
+	skb = priv->rx.desc[entry].skbs;
+	if (!skb) {
+		skb = netdev_alloc_skb_ip_align(ndev,
+						AVE_MAX_ETHFRAME);
+		if (!skb) {
+			netdev_err(ndev, "can't allocate skb for Rx\n");
+			return -ENOMEM;
+		}
+	}
+
+	/* set disable to cmdsts */
+	ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry,
+			      AVE_STS_INTR | AVE_STS_OWN);
+
+	/* map Rx buffer
+	 * Rx buffer set to the Rx descriptor has two restrictions:
+	 * - Rx buffer address is 4 byte aligned.
+	 * - Rx buffer begins with 2 byte headroom, and data will be put from
+	 *   (buffer + 2).
+	 * To satisfy this, specify the address to put back the buffer
+	 * pointer advanced by NET_IP_ALIGN by netdev_alloc_skb_ip_align(),
+	 * and expand the map size by NET_IP_ALIGN.
+	 */
+	ret = ave_dma_map(ndev, &priv->rx.desc[entry],
+			  skb->data - NET_IP_ALIGN,
+			  AVE_MAX_ETHFRAME + NET_IP_ALIGN,
+			  DMA_FROM_DEVICE, &paddr);
+	if (ret) {
+		netdev_err(ndev, "can't map skb for Rx\n");
+		dev_kfree_skb_any(skb);
+		return ret;
+	}
+	priv->rx.desc[entry].skbs = skb;
+
+	/* set buffer pointer */
+	ave_desc_write_addr(ndev, AVE_DESCID_RX, entry, paddr);
+
+	/* set enable to cmdsts */
+	ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry,
+			      AVE_STS_INTR | AVE_MAX_ETHFRAME);
+
+	return ret;
+}
+
+/* Switch state of descriptor */
+static int ave_desc_switch(struct net_device *ndev, enum desc_state state)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	int ret = 0;
+	u32 val;
+
+	switch (state) {
+	case AVE_DESC_START:
+		writel(AVE_DESCC_TD | AVE_DESCC_RD0, priv->base + AVE_DESCC);
+		break;
+
+	case AVE_DESC_STOP:
+		writel(0, priv->base + AVE_DESCC);
+		if (readl_poll_timeout(priv->base + AVE_DESCC, val, !val,
+				       150, 15000)) {
+			netdev_err(ndev, "can't stop descriptor\n");
+			ret = -EBUSY;
+		}
+		break;
+
+	case AVE_DESC_RX_SUSPEND:
+		val = readl(priv->base + AVE_DESCC);
+		val |= AVE_DESCC_RDSTP;
+		val &= ~AVE_DESCC_STATUS_MASK;
+		writel(val, priv->base + AVE_DESCC);
+		if (readl_poll_timeout(priv->base + AVE_DESCC, val,
+				       val & (AVE_DESCC_RDSTP << 16),
+				       150, 150000)) {
+			netdev_err(ndev, "can't suspend descriptor\n");
+			ret = -EBUSY;
+		}
+		break;
+
+	case AVE_DESC_RX_PERMIT:
+		val = readl(priv->base + AVE_DESCC);
+		val &= ~AVE_DESCC_RDSTP;
+		val &= ~AVE_DESCC_STATUS_MASK;
+		writel(val, priv->base + AVE_DESCC);
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int ave_tx_complete(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 proc_idx, done_idx, ndesc, cmdsts;
+	unsigned int nr_freebuf = 0;
+	unsigned int tx_packets = 0;
+	unsigned int tx_bytes = 0;
+
+	proc_idx = priv->tx.proc_idx;
+	done_idx = priv->tx.done_idx;
+	ndesc    = priv->tx.ndesc;
+
+	/* free pre-stored skb from done_idx to proc_idx */
+	while (proc_idx != done_idx) {
+		cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_TX, done_idx);
+
+		/* do nothing if owner is HW (==1 for Tx) */
+		if (cmdsts & AVE_STS_OWN)
+			break;
+
+		/* check Tx status and updates statistics */
+		if (cmdsts & AVE_STS_OK) {
+			tx_bytes += cmdsts & AVE_STS_PKTLEN_TX_MASK;
+			/* success */
+			if (cmdsts & AVE_STS_LAST)
+				tx_packets++;
+		} else {
+			/* error */
+			if (cmdsts & AVE_STS_LAST) {
+				priv->stats_tx.errors++;
+				if (cmdsts & (AVE_STS_OWC | AVE_STS_EC))
+					priv->stats_tx.collisions++;
+			}
+		}
+
+		/* release skb */
+		if (priv->tx.desc[done_idx].skbs) {
+			ave_dma_unmap(ndev, &priv->tx.desc[done_idx],
+				      DMA_TO_DEVICE);
+			dev_consume_skb_any(priv->tx.desc[done_idx].skbs);
+			priv->tx.desc[done_idx].skbs = NULL;
+			nr_freebuf++;
+		}
+		done_idx = (done_idx + 1) % ndesc;
+	}
+
+	priv->tx.done_idx = done_idx;
+
+	/* update stats */
+	u64_stats_update_begin(&priv->stats_tx.syncp);
+	priv->stats_tx.packets += tx_packets;
+	priv->stats_tx.bytes   += tx_bytes;
+	u64_stats_update_end(&priv->stats_tx.syncp);
+
+	/* wake queue for freeing buffer */
+	if (unlikely(netif_queue_stopped(ndev)) && nr_freebuf)
+		netif_wake_queue(ndev);
+
+	return nr_freebuf;
+}
+
+static int ave_rx_receive(struct net_device *ndev, int num)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	unsigned int rx_packets = 0;
+	unsigned int rx_bytes = 0;
+	u32 proc_idx, done_idx;
+	struct sk_buff *skb;
+	unsigned int pktlen;
+	int restpkt, npkts;
+	u32 ndesc, cmdsts;
+
+	proc_idx = priv->rx.proc_idx;
+	done_idx = priv->rx.done_idx;
+	ndesc    = priv->rx.ndesc;
+	restpkt  = ((proc_idx + ndesc - 1) - done_idx) % ndesc;
+
+	for (npkts = 0; npkts < num; npkts++) {
+		/* we can't receive more packet, so fill desc quickly */
+		if (--restpkt < 0)
+			break;
+
+		cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_RX, proc_idx);
+
+		/* do nothing if owner is HW (==0 for Rx) */
+		if (!(cmdsts & AVE_STS_OWN))
+			break;
+
+		if (!(cmdsts & AVE_STS_OK)) {
+			priv->stats_rx.errors++;
+			proc_idx = (proc_idx + 1) % ndesc;
+			continue;
+		}
+
+		pktlen = cmdsts & AVE_STS_PKTLEN_RX_MASK;
+
+		/* get skbuff for rx */
+		skb = priv->rx.desc[proc_idx].skbs;
+		priv->rx.desc[proc_idx].skbs = NULL;
+
+		ave_dma_unmap(ndev, &priv->rx.desc[proc_idx], DMA_FROM_DEVICE);
+
+		skb->dev = ndev;
+		skb_put(skb, pktlen);
+		skb->protocol = eth_type_trans(skb, ndev);
+
+		if ((cmdsts & AVE_STS_CSSV) && (!(cmdsts & AVE_STS_CSER)))
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+		rx_packets++;
+		rx_bytes += pktlen;
+
+		netif_receive_skb(skb);
+
+		proc_idx = (proc_idx + 1) % ndesc;
+	}
+
+	priv->rx.proc_idx = proc_idx;
+
+	/* update stats */
+	u64_stats_update_begin(&priv->stats_rx.syncp);
+	priv->stats_rx.packets += rx_packets;
+	priv->stats_rx.bytes   += rx_bytes;
+	u64_stats_update_end(&priv->stats_rx.syncp);
+
+	/* refill the Rx buffers */
+	while (proc_idx != done_idx) {
+		if (ave_rxdesc_prepare(ndev, done_idx))
+			break;
+		done_idx = (done_idx + 1) % ndesc;
+	}
+
+	priv->rx.done_idx = done_idx;
+
+	return npkts;
+}
+
+static int ave_napi_poll_rx(struct napi_struct *napi, int budget)
+{
+	struct ave_private *priv;
+	struct net_device *ndev;
+	int num;
+
+	priv = container_of(napi, struct ave_private, napi_rx);
+	ndev = priv->ndev;
+
+	num = ave_rx_receive(ndev, budget);
+	if (num < budget) {
+		napi_complete_done(napi, num);
+
+		/* enable Rx interrupt when NAPI finishes */
+		ave_irq_enable(ndev, AVE_GI_RXIINT);
+	}
+
+	return num;
+}
+
+static int ave_napi_poll_tx(struct napi_struct *napi, int budget)
+{
+	struct ave_private *priv;
+	struct net_device *ndev;
+	int num;
+
+	priv = container_of(napi, struct ave_private, napi_tx);
+	ndev = priv->ndev;
+
+	num = ave_tx_complete(ndev);
+	napi_complete(napi);
+
+	/* enable Tx interrupt when NAPI finishes */
+	ave_irq_enable(ndev, AVE_GI_TX);
+
+	return num;
+}
+
+static void ave_global_reset(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 val;
+
+	/* set config register */
+	val = AVE_CFGR_FLE | AVE_CFGR_IPFCEN | AVE_CFGR_CHE;
+	if (!phy_interface_mode_is_rgmii(priv->phy_mode))
+		val |= AVE_CFGR_MII;
+	writel(val, priv->base + AVE_CFGR);
+
+	/* reset RMII register */
+	val = readl(priv->base + AVE_RSTCTRL);
+	val &= ~AVE_RSTCTRL_RMIIRST;
+	writel(val, priv->base + AVE_RSTCTRL);
+
+	/* assert reset */
+	writel(AVE_GRR_GRST | AVE_GRR_PHYRST, priv->base + AVE_GRR);
+	msleep(20);
+
+	/* 1st, negate PHY reset only */
+	writel(AVE_GRR_GRST, priv->base + AVE_GRR);
+	msleep(40);
+
+	/* negate reset */
+	writel(0, priv->base + AVE_GRR);
+	msleep(40);
+
+	/* negate RMII register */
+	val = readl(priv->base + AVE_RSTCTRL);
+	val |= AVE_RSTCTRL_RMIIRST;
+	writel(val, priv->base + AVE_RSTCTRL);
+
+	ave_irq_disable_all(ndev);
+}
+
+static void ave_rxfifo_reset(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 rxcr_org;
+
+	/* save and disable MAC receive op */
+	rxcr_org = readl(priv->base + AVE_RXCR);
+	writel(rxcr_org & (~AVE_RXCR_RXEN), priv->base + AVE_RXCR);
+
+	/* suspend Rx descriptor */
+	ave_desc_switch(ndev, AVE_DESC_RX_SUSPEND);
+
+	/* receive all packets before descriptor starts */
+	ave_rx_receive(ndev, priv->rx.ndesc);
+
+	/* assert reset */
+	writel(AVE_GRR_RXFFR, priv->base + AVE_GRR);
+	usleep_range(40, 50);
+
+	/* negate reset */
+	writel(0, priv->base + AVE_GRR);
+	usleep_range(10, 20);
+
+	/* negate interrupt status */
+	writel(AVE_GI_RXOVF, priv->base + AVE_GISR);
+
+	/* permit descriptor */
+	ave_desc_switch(ndev, AVE_DESC_RX_PERMIT);
+
+	/* restore MAC reccieve op */
+	writel(rxcr_org, priv->base + AVE_RXCR);
+}
+
+static irqreturn_t ave_irq_handler(int irq, void *netdev)
+{
+	struct net_device *ndev = (struct net_device *)netdev;
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 gimr_val, gisr_val;
+
+	gimr_val = ave_irq_disable_all(ndev);
+
+	/* get interrupt status */
+	gisr_val = readl(priv->base + AVE_GISR);
+
+	/* PHY */
+	if (gisr_val & AVE_GI_PHY)
+		writel(AVE_GI_PHY, priv->base + AVE_GISR);
+
+	/* check exceeding packet */
+	if (gisr_val & AVE_GI_RXERR) {
+		writel(AVE_GI_RXERR, priv->base + AVE_GISR);
+		netdev_err(ndev, "receive a packet exceeding frame buffer\n");
+	}
+
+	gisr_val &= gimr_val;
+	if (!gisr_val)
+		goto exit_isr;
+
+	/* RxFIFO overflow */
+	if (gisr_val & AVE_GI_RXOVF) {
+		priv->stats_rx.fifo_errors++;
+		ave_rxfifo_reset(ndev);
+		goto exit_isr;
+	}
+
+	/* Rx drop */
+	if (gisr_val & AVE_GI_RXDROP) {
+		priv->stats_rx.dropped++;
+		writel(AVE_GI_RXDROP, priv->base + AVE_GISR);
+	}
+
+	/* Rx interval */
+	if (gisr_val & AVE_GI_RXIINT) {
+		napi_schedule(&priv->napi_rx);
+		/* still force to disable Rx interrupt until NAPI finishes */
+		gimr_val &= ~AVE_GI_RXIINT;
+	}
+
+	/* Tx completed */
+	if (gisr_val & AVE_GI_TX) {
+		napi_schedule(&priv->napi_tx);
+		/* still force to disable Tx interrupt until NAPI finishes */
+		gimr_val &= ~AVE_GI_TX;
+	}
+
+exit_isr:
+	ave_irq_restore(ndev, gimr_val);
+
+	return IRQ_HANDLED;
+}
+
+static int ave_pfsel_start(struct net_device *ndev, unsigned int entry)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 val;
+
+	if (WARN_ON(entry > AVE_PF_SIZE))
+		return -EINVAL;
+
+	val = readl(priv->base + AVE_PFEN);
+	writel(val | BIT(entry), priv->base + AVE_PFEN);
+
+	return 0;
+}
+
+static int ave_pfsel_stop(struct net_device *ndev, unsigned int entry)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 val;
+
+	if (WARN_ON(entry > AVE_PF_SIZE))
+		return -EINVAL;
+
+	val = readl(priv->base + AVE_PFEN);
+	writel(val & ~BIT(entry), priv->base + AVE_PFEN);
+
+	return 0;
+}
+
+static int ave_pfsel_set_macaddr(struct net_device *ndev,
+				 unsigned int entry,
+				 const unsigned char *mac_addr,
+				 unsigned int set_size)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	if (WARN_ON(entry > AVE_PF_SIZE))
+		return -EINVAL;
+	if (WARN_ON(set_size > 6))
+		return -EINVAL;
+
+	ave_pfsel_stop(ndev, entry);
+
+	/* set MAC address for the filter */
+	ave_hw_write_macaddr(ndev, mac_addr,
+			     AVE_PKTF(entry), AVE_PKTF(entry) + 4);
+
+	/* set byte mask */
+	writel(GENMASK(31, set_size) & AVE_PFMBYTE_MASK0,
+	       priv->base + AVE_PFMBYTE(entry));
+	writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4);
+
+	/* set bit mask filter */
+	writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry));
+
+	/* set selector to ring 0 */
+	writel(0, priv->base + AVE_PFSEL(entry));
+
+	/* restart filter */
+	ave_pfsel_start(ndev, entry);
+
+	return 0;
+}
+
+static void ave_pfsel_set_promisc(struct net_device *ndev,
+				  unsigned int entry, u32 rxring)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	if (WARN_ON(entry > AVE_PF_SIZE))
+		return;
+
+	ave_pfsel_stop(ndev, entry);
+
+	/* set byte mask */
+	writel(AVE_PFMBYTE_MASK0, priv->base + AVE_PFMBYTE(entry));
+	writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4);
+
+	/* set bit mask filter */
+	writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry));
+
+	/* set selector to rxring */
+	writel(rxring, priv->base + AVE_PFSEL(entry));
+
+	ave_pfsel_start(ndev, entry);
+}
+
+static void ave_pfsel_init(struct net_device *ndev)
+{
+	unsigned char bcast_mac[ETH_ALEN];
+	int i;
+
+	eth_broadcast_addr(bcast_mac);
+
+	for (i = 0; i < AVE_PF_SIZE; i++)
+		ave_pfsel_stop(ndev, i);
+
+	/* promiscious entry, select ring 0 */
+	ave_pfsel_set_promisc(ndev, AVE_PFNUM_FILTER, 0);
+
+	/* unicast entry */
+	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6);
+
+	/* broadcast entry */
+	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_BROADCAST, bcast_mac, 6);
+}
+
+static void ave_phy_adjust_link(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	struct phy_device *phydev = ndev->phydev;
+	u32 val, txcr, rxcr, rxcr_org;
+	u16 rmt_adv = 0, lcl_adv = 0;
+	u8 cap;
+
+	/* set RGMII speed */
+	val = readl(priv->base + AVE_TXCR);
+	val &= ~(AVE_TXCR_TXSPD_100 | AVE_TXCR_TXSPD_1G);
+
+	if (phy_interface_is_rgmii(phydev) && phydev->speed == SPEED_1000)
+		val |= AVE_TXCR_TXSPD_1G;
+	else if (phydev->speed == SPEED_100)
+		val |= AVE_TXCR_TXSPD_100;
+
+	writel(val, priv->base + AVE_TXCR);
+
+	/* set RMII speed (100M/10M only) */
+	if (!phy_interface_is_rgmii(phydev)) {
+		val = readl(priv->base + AVE_LINKSEL);
+		if (phydev->speed == SPEED_10)
+			val &= ~AVE_LINKSEL_100M;
+		else
+			val |= AVE_LINKSEL_100M;
+		writel(val, priv->base + AVE_LINKSEL);
+	}
+
+	/* check current RXCR/TXCR */
+	rxcr = readl(priv->base + AVE_RXCR);
+	txcr = readl(priv->base + AVE_TXCR);
+	rxcr_org = rxcr;
+
+	if (phydev->duplex) {
+		rxcr |= AVE_RXCR_FDUPEN;
+
+		if (phydev->pause)
+			rmt_adv |= LPA_PAUSE_CAP;
+		if (phydev->asym_pause)
+			rmt_adv |= LPA_PAUSE_ASYM;
+		if (phydev->advertising & ADVERTISED_Pause)
+			lcl_adv |= ADVERTISE_PAUSE_CAP;
+		if (phydev->advertising & ADVERTISED_Asym_Pause)
+			lcl_adv |= ADVERTISE_PAUSE_ASYM;
+
+		cap = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
+		if (cap & FLOW_CTRL_TX)
+			txcr |= AVE_TXCR_FLOCTR;
+		else
+			txcr &= ~AVE_TXCR_FLOCTR;
+		if (cap & FLOW_CTRL_RX)
+			rxcr |= AVE_RXCR_FLOCTR;
+		else
+			rxcr &= ~AVE_RXCR_FLOCTR;
+	} else {
+		rxcr &= ~AVE_RXCR_FDUPEN;
+		rxcr &= ~AVE_RXCR_FLOCTR;
+		txcr &= ~AVE_TXCR_FLOCTR;
+	}
+
+	if (rxcr_org != rxcr) {
+		/* disable Rx mac */
+		writel(rxcr & ~AVE_RXCR_RXEN, priv->base + AVE_RXCR);
+		/* change and enable TX/Rx mac */
+		writel(txcr, priv->base + AVE_TXCR);
+		writel(rxcr, priv->base + AVE_RXCR);
+	}
+
+	phy_print_status(phydev);
+}
+
+static void ave_macaddr_init(struct net_device *ndev)
+{
+	ave_hw_write_macaddr(ndev, ndev->dev_addr, AVE_RXMAC1R, AVE_RXMAC2R);
+
+	/* pfsel unicast entry */
+	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6);
+}
+
+static int ave_init(struct net_device *ndev)
+{
+	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
+	struct ave_private *priv = netdev_priv(ndev);
+	struct device *dev = ndev->dev.parent;
+	struct device_node *np = dev->of_node;
+	struct device_node *mdio_np;
+	struct phy_device *phydev;
+	int ret;
+
+	/* enable clk because of hw access until ndo_open */
+	ret = clk_prepare_enable(priv->clk);
+	if (ret) {
+		dev_err(dev, "can't enable clock\n");
+		return ret;
+	}
+	ret = reset_control_deassert(priv->rst);
+	if (ret) {
+		dev_err(dev, "can't deassert reset\n");
+		goto out_clk_disable;
+	}
+
+	ave_global_reset(ndev);
+
+	mdio_np = of_get_child_by_name(np, "mdio");
+	if (!mdio_np) {
+		dev_err(dev, "mdio node not found\n");
+		ret = -EINVAL;
+		goto out_reset_assert;
+	}
+	ret = of_mdiobus_register(priv->mdio, mdio_np);
+	of_node_put(mdio_np);
+	if (ret) {
+		dev_err(dev, "failed to register mdiobus\n");
+		goto out_reset_assert;
+	}
+
+	phydev = of_phy_get_and_connect(ndev, np, ave_phy_adjust_link);
+	if (!phydev) {
+		dev_err(dev, "could not attach to PHY\n");
+		ret = -ENODEV;
+		goto out_mdio_unregister;
+	}
+
+	priv->phydev = phydev;
+
+	phy_ethtool_get_wol(phydev, &wol);
+	device_set_wakeup_capable(&ndev->dev, !!wol.supported);
+
+	if (!phy_interface_is_rgmii(phydev)) {
+		phydev->supported &= ~PHY_GBIT_FEATURES;
+		phydev->supported |= PHY_BASIC_FEATURES;
+	}
+	phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+
+	phy_attached_info(phydev);
+
+	return 0;
+
+out_mdio_unregister:
+	mdiobus_unregister(priv->mdio);
+out_reset_assert:
+	reset_control_assert(priv->rst);
+out_clk_disable:
+	clk_disable_unprepare(priv->clk);
+
+	return ret;
+}
+
+static void ave_uninit(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	phy_disconnect(priv->phydev);
+	mdiobus_unregister(priv->mdio);
+
+	/* disable clk because of hw access after ndo_stop */
+	reset_control_assert(priv->rst);
+	clk_disable_unprepare(priv->clk);
+}
+
+static int ave_open(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	int entry;
+	int ret;
+	u32 val;
+
+	ret = request_irq(priv->irq, ave_irq_handler, IRQF_SHARED, ndev->name,
+			  ndev);
+	if (ret)
+		return ret;
+
+	priv->tx.desc = kcalloc(priv->tx.ndesc, sizeof(*priv->tx.desc),
+				GFP_KERNEL);
+	if (!priv->tx.desc) {
+		ret = -ENOMEM;
+		goto out_free_irq;
+	}
+
+	priv->rx.desc = kcalloc(priv->rx.ndesc, sizeof(*priv->rx.desc),
+				GFP_KERNEL);
+	if (!priv->rx.desc) {
+		kfree(priv->tx.desc);
+		ret = -ENOMEM;
+		goto out_free_irq;
+	}
+
+	/* initialize Tx work and descriptor */
+	priv->tx.proc_idx = 0;
+	priv->tx.done_idx = 0;
+	for (entry = 0; entry < priv->tx.ndesc; entry++) {
+		ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, entry, 0);
+		ave_desc_write_addr(ndev, AVE_DESCID_TX, entry, 0);
+	}
+	writel(AVE_TXDC_ADDR_START |
+	       (((priv->tx.ndesc * priv->desc_size) << 16) & AVE_TXDC_SIZE),
+	       priv->base + AVE_TXDC);
+
+	/* initialize Rx work and descriptor */
+	priv->rx.proc_idx = 0;
+	priv->rx.done_idx = 0;
+	for (entry = 0; entry < priv->rx.ndesc; entry++) {
+		if (ave_rxdesc_prepare(ndev, entry))
+			break;
+	}
+	writel(AVE_RXDC0_ADDR_START |
+	       (((priv->rx.ndesc * priv->desc_size) << 16) & AVE_RXDC0_SIZE),
+	       priv->base + AVE_RXDC0);
+
+	ave_desc_switch(ndev, AVE_DESC_START);
+
+	ave_pfsel_init(ndev);
+	ave_macaddr_init(ndev);
+
+	/* set Rx configuration */
+	/* full duplex, enable pause drop, enalbe flow control */
+	val = AVE_RXCR_RXEN | AVE_RXCR_FDUPEN | AVE_RXCR_DRPEN |
+		AVE_RXCR_FLOCTR | (AVE_MAX_ETHFRAME & AVE_RXCR_MPSIZ_MASK);
+	writel(val, priv->base + AVE_RXCR);
+
+	/* set Tx configuration */
+	/* enable flow control, disable loopback */
+	writel(AVE_TXCR_FLOCTR, priv->base + AVE_TXCR);
+
+	/* enable timer, clear EN,INTM, and mask interval unit(BSCK) */
+	val = readl(priv->base + AVE_IIRQC) & AVE_IIRQC_BSCK;
+	val |= AVE_IIRQC_EN0 | (AVE_INTM_COUNT << 16);
+	writel(val, priv->base + AVE_IIRQC);
+
+	val = AVE_GI_RXIINT | AVE_GI_RXOVF | AVE_GI_TX;
+	ave_irq_restore(ndev, val);
+
+	napi_enable(&priv->napi_rx);
+	napi_enable(&priv->napi_tx);
+
+	phy_start(ndev->phydev);
+	phy_start_aneg(ndev->phydev);
+	netif_start_queue(ndev);
+
+	return 0;
+
+out_free_irq:
+	disable_irq(priv->irq);
+	free_irq(priv->irq, ndev);
+
+	return ret;
+}
+
+static int ave_stop(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	int entry;
+
+	ave_irq_disable_all(ndev);
+	disable_irq(priv->irq);
+	free_irq(priv->irq, ndev);
+
+	netif_tx_disable(ndev);
+	phy_stop(ndev->phydev);
+	napi_disable(&priv->napi_tx);
+	napi_disable(&priv->napi_rx);
+
+	ave_desc_switch(ndev, AVE_DESC_STOP);
+
+	/* free Tx buffer */
+	for (entry = 0; entry < priv->tx.ndesc; entry++) {
+		if (!priv->tx.desc[entry].skbs)
+			continue;
+
+		ave_dma_unmap(ndev, &priv->tx.desc[entry], DMA_TO_DEVICE);
+		dev_kfree_skb_any(priv->tx.desc[entry].skbs);
+		priv->tx.desc[entry].skbs = NULL;
+	}
+	priv->tx.proc_idx = 0;
+	priv->tx.done_idx = 0;
+
+	/* free Rx buffer */
+	for (entry = 0; entry < priv->rx.ndesc; entry++) {
+		if (!priv->rx.desc[entry].skbs)
+			continue;
+
+		ave_dma_unmap(ndev, &priv->rx.desc[entry], DMA_FROM_DEVICE);
+		dev_kfree_skb_any(priv->rx.desc[entry].skbs);
+		priv->rx.desc[entry].skbs = NULL;
+	}
+	priv->rx.proc_idx = 0;
+	priv->rx.done_idx = 0;
+
+	kfree(priv->tx.desc);
+	kfree(priv->rx.desc);
+
+	return 0;
+}
+
+static int ave_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	u32 proc_idx, done_idx, ndesc, cmdsts;
+	int ret, freepkt;
+	dma_addr_t paddr;
+
+	proc_idx = priv->tx.proc_idx;
+	done_idx = priv->tx.done_idx;
+	ndesc = priv->tx.ndesc;
+	freepkt = ((done_idx + ndesc - 1) - proc_idx) % ndesc;
+
+	/* stop queue when not enough entry */
+	if (unlikely(freepkt < 1)) {
+		netif_stop_queue(ndev);
+		return NETDEV_TX_BUSY;
+	}
+
+	/* add padding for short packet */
+	if (skb_put_padto(skb, ETH_ZLEN)) {
+		priv->stats_tx.dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	/* map Tx buffer
+	 * Tx buffer set to the Tx descriptor doesn't have any restriction.
+	 */
+	ret = ave_dma_map(ndev, &priv->tx.desc[proc_idx],
+			  skb->data, skb->len, DMA_TO_DEVICE, &paddr);
+	if (ret) {
+		dev_kfree_skb_any(skb);
+		priv->stats_tx.dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	priv->tx.desc[proc_idx].skbs = skb;
+
+	ave_desc_write_addr(ndev, AVE_DESCID_TX, proc_idx, paddr);
+
+	cmdsts = AVE_STS_OWN | AVE_STS_1ST | AVE_STS_LAST |
+		(skb->len & AVE_STS_PKTLEN_TX_MASK);
+
+	/* set interrupt per AVE_FORCE_TXINTCNT or when queue is stopped */
+	if (!(proc_idx % AVE_FORCE_TXINTCNT) || netif_queue_stopped(ndev))
+		cmdsts |= AVE_STS_INTR;
+
+	/* disable checksum calculation when skb doesn't calurate checksum */
+	if (skb->ip_summed == CHECKSUM_NONE ||
+	    skb->ip_summed == CHECKSUM_UNNECESSARY)
+		cmdsts |= AVE_STS_NOCSUM;
+
+	ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, proc_idx, cmdsts);
+
+	priv->tx.proc_idx = (proc_idx + 1) % ndesc;
+
+	return NETDEV_TX_OK;
+}
+
+static int ave_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
+{
+	return phy_mii_ioctl(ndev->phydev, ifr, cmd);
+}
+
+static const u8 v4multi_macadr[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
+static const u8 v6multi_macadr[] = { 0x33, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+static void ave_set_rx_mode(struct net_device *ndev)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	struct netdev_hw_addr *hw_adr;
+	int count, mc_cnt;
+	u32 val;
+
+	/* MAC addr filter enable for promiscious mode */
+	mc_cnt = netdev_mc_count(ndev);
+	val = readl(priv->base + AVE_RXCR);
+	if (ndev->flags & IFF_PROMISC || !mc_cnt)
+		val &= ~AVE_RXCR_AFEN;
+	else
+		val |= AVE_RXCR_AFEN;
+	writel(val, priv->base + AVE_RXCR);
+
+	/* set all multicast address */
+	if ((ndev->flags & IFF_ALLMULTI) || mc_cnt > AVE_PF_MULTICAST_SIZE) {
+		ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST,
+				      v4multi_macadr, 1);
+		ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + 1,
+				      v6multi_macadr, 1);
+	} else {
+		/* stop all multicast filter */
+		for (count = 0; count < AVE_PF_MULTICAST_SIZE; count++)
+			ave_pfsel_stop(ndev, AVE_PFNUM_MULTICAST + count);
+
+		/* set multicast addresses */
+		count = 0;
+		netdev_for_each_mc_addr(hw_adr, ndev) {
+			if (count == mc_cnt)
+				break;
+			ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + count,
+					      hw_adr->addr, 6);
+			count++;
+		}
+	}
+}
+
+static void ave_get_stats64(struct net_device *ndev,
+			    struct rtnl_link_stats64 *stats)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+	unsigned int start;
+
+	do {
+		start = u64_stats_fetch_begin_irq(&priv->stats_rx.syncp);
+		stats->rx_packets = priv->stats_rx.packets;
+		stats->rx_bytes	  = priv->stats_rx.bytes;
+	} while (u64_stats_fetch_retry_irq(&priv->stats_rx.syncp, start));
+
+	do {
+		start = u64_stats_fetch_begin_irq(&priv->stats_tx.syncp);
+		stats->tx_packets = priv->stats_tx.packets;
+		stats->tx_bytes	  = priv->stats_tx.bytes;
+	} while (u64_stats_fetch_retry_irq(&priv->stats_tx.syncp, start));
+
+	stats->rx_errors      = priv->stats_rx.errors;
+	stats->tx_errors      = priv->stats_tx.errors;
+	stats->rx_dropped     = priv->stats_rx.dropped;
+	stats->tx_dropped     = priv->stats_tx.dropped;
+	stats->rx_fifo_errors = priv->stats_rx.fifo_errors;
+	stats->collisions     = priv->stats_tx.collisions;
+}
+
+static int ave_set_mac_address(struct net_device *ndev, void *p)
+{
+	int ret = eth_mac_addr(ndev, p);
+
+	if (ret)
+		return ret;
+
+	ave_macaddr_init(ndev);
+
+	return 0;
+}
+
+static const struct net_device_ops ave_netdev_ops = {
+	.ndo_init		= ave_init,
+	.ndo_uninit		= ave_uninit,
+	.ndo_open		= ave_open,
+	.ndo_stop		= ave_stop,
+	.ndo_start_xmit		= ave_start_xmit,
+	.ndo_do_ioctl		= ave_ioctl,
+	.ndo_set_rx_mode	= ave_set_rx_mode,
+	.ndo_get_stats64	= ave_get_stats64,
+	.ndo_set_mac_address	= ave_set_mac_address,
+};
+
+static int ave_probe(struct platform_device *pdev)
+{
+	const struct ave_soc_data *data;
+	struct device *dev = &pdev->dev;
+	char buf[ETHTOOL_FWVERS_LEN];
+	phy_interface_t phy_mode;
+	struct ave_private *priv;
+	struct net_device *ndev;
+	struct device_node *np;
+	struct resource	*res;
+	const void *mac_addr;
+	void __iomem *base;
+	u64 dma_mask;
+	int irq, ret;
+	u32 ave_id;
+
+	data = of_device_get_match_data(dev);
+	if (WARN_ON(!data))
+		return -EINVAL;
+
+	np = dev->of_node;
+	phy_mode = of_get_phy_mode(np);
+	if (phy_mode < 0) {
+		dev_err(dev, "phy-mode not found\n");
+		return -EINVAL;
+	}
+	if ((!phy_interface_mode_is_rgmii(phy_mode)) &&
+	    phy_mode != PHY_INTERFACE_MODE_RMII &&
+	    phy_mode != PHY_INTERFACE_MODE_MII) {
+		dev_err(dev, "phy-mode is invalid\n");
+		return -EINVAL;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(dev, "IRQ not found\n");
+		return irq;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	ndev = alloc_etherdev(sizeof(struct ave_private));
+	if (!ndev) {
+		dev_err(dev, "can't allocate ethernet device\n");
+		return -ENOMEM;
+	}
+
+	ndev->netdev_ops = &ave_netdev_ops;
+	ndev->ethtool_ops = &ave_ethtool_ops;
+	SET_NETDEV_DEV(ndev, dev);
+
+	ndev->features    |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);
+	ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);
+
+	ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN + ETH_FCS_LEN);
+
+	mac_addr = of_get_mac_address(np);
+	if (mac_addr)
+		ether_addr_copy(ndev->dev_addr, mac_addr);
+
+	/* if the mac address is invalid, use random mac address */
+	if (!is_valid_ether_addr(ndev->dev_addr)) {
+		eth_hw_addr_random(ndev);
+		dev_warn(dev, "Using random MAC address: %pM\n",
+			 ndev->dev_addr);
+	}
+
+	priv = netdev_priv(ndev);
+	priv->base = base;
+	priv->irq = irq;
+	priv->ndev = ndev;
+	priv->msg_enable = netif_msg_init(-1, AVE_DEFAULT_MSG_ENABLE);
+	priv->phy_mode = phy_mode;
+	priv->data = data;
+
+	if (IS_DESC_64BIT(priv)) {
+		priv->desc_size = AVE_DESC_SIZE_64;
+		priv->tx.daddr  = AVE_TXDM_64;
+		priv->rx.daddr  = AVE_RXDM_64;
+		dma_mask = DMA_BIT_MASK(64);
+	} else {
+		priv->desc_size = AVE_DESC_SIZE_32;
+		priv->tx.daddr  = AVE_TXDM_32;
+		priv->rx.daddr  = AVE_RXDM_32;
+		dma_mask = DMA_BIT_MASK(32);
+	}
+	ret = dma_set_mask(dev, dma_mask);
+	if (ret)
+		goto out_free_netdev;
+
+	priv->tx.ndesc = AVE_NR_TXDESC;
+	priv->rx.ndesc = AVE_NR_RXDESC;
+
+	u64_stats_init(&priv->stats_tx.syncp);
+	u64_stats_init(&priv->stats_rx.syncp);
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		ret = PTR_ERR(priv->clk);
+		goto out_free_netdev;
+	}
+
+	priv->rst = devm_reset_control_get_optional_shared(dev, NULL);
+	if (IS_ERR(priv->rst)) {
+		ret = PTR_ERR(priv->rst);
+		goto out_free_netdev;
+	}
+
+	priv->mdio = devm_mdiobus_alloc(dev);
+	if (!priv->mdio) {
+		ret = -ENOMEM;
+		goto out_free_netdev;
+	}
+	priv->mdio->priv = ndev;
+	priv->mdio->parent = dev;
+	priv->mdio->read = ave_mdiobus_read;
+	priv->mdio->write = ave_mdiobus_write;
+	priv->mdio->name = "uniphier-mdio";
+	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%x",
+		 pdev->name, pdev->id);
+
+	/* Register as a NAPI supported driver */
+	netif_napi_add(ndev, &priv->napi_rx, ave_napi_poll_rx, priv->rx.ndesc);
+	netif_tx_napi_add(ndev, &priv->napi_tx, ave_napi_poll_tx,
+			  priv->tx.ndesc);
+
+	platform_set_drvdata(pdev, ndev);
+
+	ret = register_netdev(ndev);
+	if (ret) {
+		dev_err(dev, "failed to register netdevice\n");
+		goto out_del_napi;
+	}
+
+	/* get ID and version */
+	ave_id = readl(priv->base + AVE_IDR);
+	ave_hw_read_version(ndev, buf, sizeof(buf));
+
+	dev_info(dev, "Socionext %c%c%c%c Ethernet IP %s (irq=%d, phy=%s)\n",
+		 (ave_id >> 24) & 0xff, (ave_id >> 16) & 0xff,
+		 (ave_id >> 8) & 0xff, (ave_id >> 0) & 0xff,
+		 buf, priv->irq, phy_modes(phy_mode));
+
+	return 0;
+
+out_del_napi:
+	netif_napi_del(&priv->napi_rx);
+	netif_napi_del(&priv->napi_tx);
+out_free_netdev:
+	free_netdev(ndev);
+
+	return ret;
+}
+
+static int ave_remove(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct ave_private *priv = netdev_priv(ndev);
+
+	unregister_netdev(ndev);
+	netif_napi_del(&priv->napi_rx);
+	netif_napi_del(&priv->napi_tx);
+	free_netdev(ndev);
+
+	return 0;
+}
+
+static const struct ave_soc_data ave_pro4_data = {
+	.is_desc_64bit = false,
+};
+
+static const struct ave_soc_data ave_pxs2_data = {
+	.is_desc_64bit = false,
+};
+
+static const struct ave_soc_data ave_ld11_data = {
+	.is_desc_64bit = false,
+};
+
+static const struct ave_soc_data ave_ld20_data = {
+	.is_desc_64bit = true,
+};
+
+static const struct of_device_id of_ave_match[] = {
+	{
+		.compatible = "socionext,uniphier-pro4-ave4",
+		.data = &ave_pro4_data,
+	},
+	{
+		.compatible = "socionext,uniphier-pxs2-ave4",
+		.data = &ave_pxs2_data,
+	},
+	{
+		.compatible = "socionext,uniphier-ld11-ave4",
+		.data = &ave_ld11_data,
+	},
+	{
+		.compatible = "socionext,uniphier-ld20-ave4",
+		.data = &ave_ld20_data,
+	},
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_ave_match);
+
+static struct platform_driver ave_driver = {
+	.probe  = ave_probe,
+	.remove = ave_remove,
+	.driver	= {
+		.name = "ave",
+		.of_match_table	= of_ave_match,
+	},
+};
+module_platform_driver(ave_driver);
+
+MODULE_DESCRIPTION("Socionext UniPhier AVE ethernet driver");
+MODULE_LICENSE("GPL v2");