[PATCH net-next v5 0/2] add UniPhier AVE ethernet support

[PATCH net-next v5 0/2] add UniPhier AVE ethernet support

[Kunihiko Hayashi]

This series adds support for Socionext AVE ethernet controller implemented
on UniPhier SoCs. This driver supports RGMII/RMII modes.

v4: https://www.spinics.net/lists/netdev/msg469294.html

The PHY patch included in v1 has already separated in:
http://www.spinics.net/lists/netdev/msg454595.html

Changes since v4:
- fix larger integer warning on AVE_PFMBYTE_MASK0

Changes since v3:
- remove checking dma address and use dma_set_mask() to restirct address
- replace ave_mdio_busywait() with read_poll_timeout()
- replace functions to access to registers with readl/writel() directly
- replace a function to access to macaddr with ave_hw_write_macaddr()
- change return value of ave_dma_map() to error value
- move mdiobus_unregister() from ave_remove() to ave_uninit()
- eliminate else block at the end of ave_dma_map()
- add mask definitions for packet filter
- sort bitmap definitions in descending order
- add error check to some functions
- rename and sort functions to clear sub-categories
- fix error value consistency
- remove unneeded initializers
- change type of constant arrays

Changes since v2:
- replace clk_get() with devm_clk_get()
- replace reset_control_get() with devm_reset_control_get_optional_shared()
- add error return when the error occurs on the above *_get functions
- sort soc data and compatible strings
- remove clearly obvious comments
- modify dt-bindings document consistent with these modifications

Changes since v1:
- add/remove devicetree properties and sub-node
  - remove "internal-phy-interrupt" and "desc-bits" property
  - add SoC data structures based on compatible strings
  - add node operation to apply "mdio" sub-node
- add support for features
  - add support for {get,set}_pauseparam and pause frame operations
  - add support for ndo_get_stats64 instead of ndo_get_stats
- replace with desiable functions
  - replace check for valid phy_mode with phy_interface{_mode}_is_rgmii()
  - replace phy attach message with phy_attached_info()
  - replace 32bit operation with {upper,lower}_32_bits() on ave_wdesc_addr()
  - replace nway_reset and get_link with generic functions
- move operations to proper functions
  - move phy_start_aneg() to ndo_open,
    and remove unnecessary PHY interrupt operations
    See http://www.spinics.net/lists/netdev/msg454590.html
  - move irq initialization and descriptor memory allocation to ndo_open
  - move initialization of reset and clock and mdiobus to ndo_init
- fix skbuffer operations
  - fix skb alignment operations and add Rx buffer adjustment for descriptor
    See http://www.spinics.net/lists/netdev/msg456014.html
  - add error returns when dma_map_single() failed 
- clean up code structures
  - clean up wait-loop and wake-queue conditions
  - add ave_wdesc_addr() and offset definitions
  - add ave_macaddr_init() to clean up mac-address operation
  - fix checking whether Tx entry is not enough
  - fix supported features of phydev
  - add necessary free/disable operations
  - add phydev check on ave_{get,set}_wol()
  - remove netif_carrier functions, phydev initializer, and Tx budget check
- change obsolate codes
  - replace ndev->{base_addr,irq} with the members of ave_private
- rename goto labels and mask definitions, and remove unused codes

Kunihiko Hayashi (2):
  dt-bindings: net: add DT bindings for Socionext UniPhier AVE
  net: ethernet: socionext: add AVE ethernet driver

 .../bindings/net/socionext,uniphier-ave4.txt       |   48 +
 drivers/net/ethernet/Kconfig                       |    1 +
 drivers/net/ethernet/Makefile                      |    1 +
 drivers/net/ethernet/socionext/Kconfig             |   22 +
 drivers/net/ethernet/socionext/Makefile            |    5 +
 drivers/net/ethernet/socionext/sni_ave.c           | 1744 ++++++++++++++++++++
 6 files changed, 1821 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/socionext,uniphier-ave4.txt
 create mode 100644 drivers/net/ethernet/socionext/Kconfig
 create mode 100644 drivers/net/ethernet/socionext/Makefile
 create mode 100644 drivers/net/ethernet/socionext/sni_ave.c

-- 
2.7.4

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[PATCH net-next v5 1/2] dt-bindings: net: add DT bindings for Socionext UniPhier AVE

[Kunihiko Hayashi]

DT bindings for the AVE ethernet controller found on Socionext's
UniPhier platforms.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../bindings/net/socionext,uniphier-ave4.txt       | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/socionext,uniphier-ave4.txt

diff --git a/Documentation/devicetree/bindings/net/socionext,uniphier-ave4.txt b/Documentation/devicetree/bindings/net/socionext,uniphier-ave4.txt
new file mode 100644
index 0000000..4700377
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/socionext,uniphier-ave4.txt
@@ -0,0 +1,48 @@
+* Socionext AVE ethernet controller
+
+This describes the devicetree bindings for AVE ethernet controller
+implemented on Socionext UniPhier SoCs.
+
+Required properties:
+ - compatible: Should be
+	- "socionext,uniphier-pro4-ave4" : for Pro4 SoC
+	- "socionext,uniphier-pxs2-ave4" : for PXs2 SoC
+	- "socionext,uniphier-ld11-ave4" : for LD11 SoC
+	- "socionext,uniphier-ld20-ave4" : for LD20 SoC
+ - reg: Address where registers are mapped and size of region.
+ - interrupts: Should contain the MAC interrupt.
+ - phy-mode: See ethernet.txt in the same directory. Allow to choose
+	"rgmii", "rmii", or "mii" according to the PHY.
+ - phy-handle: Should point to the external phy device.
+	See ethernet.txt file in the same directory.
+ - clocks: A phandle to the clock for the MAC.
+
+Optional properties:
+ - resets: A phandle to the reset control for the MAC
+ - local-mac-address: See ethernet.txt in the same directory.
+
+Required subnode:
+ - mdio: Device tree subnode with the following required properties:
+	- #address-cells: Must be <1>.
+	- #size-cells: Must be <0>.
+	- reg: phy ID number, usually a small integer.
+
+Example:
+
+	ether: ethernet@65000000 {
+		compatible = "socionext,uniphier-ld20-ave4";
+		reg = <0x65000000 0x8500>;
+		interrupts = <0 66 4>;
+		phy-mode = "rgmii";
+		phy-handle = <&ethphy>;
+		clocks = <&sys_clk 6>;
+		resets = <&sys_rst 6>;
+		local-mac-address = [00 00 00 00 00 00];
+		mdio {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			ethphy: ethphy@1 {
+				reg = <1>;
+			};
+		};
+	};
-- 
2.7.4

[PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Kunihiko Hayashi]

The UniPhier platform from Socionext provides the AVE ethernet
controller that includes MAC and MDIO bus supporting RGMII/RMII
modes. The controller is named AVE.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/ethernet/Kconfig             |    1 +
 drivers/net/ethernet/Makefile            |    1 +
 drivers/net/ethernet/socionext/Kconfig   |   22 +
 drivers/net/ethernet/socionext/Makefile  |    5 +
 drivers/net/ethernet/socionext/sni_ave.c | 1744 ++++++++++++++++++++++++++++++
 5 files changed, 1773 insertions(+)
 create mode 100644 drivers/net/ethernet/socionext/Kconfig
 create mode 100644 drivers/net/ethernet/socionext/Makefile
 create mode 100644 drivers/net/ethernet/socionext/sni_ave.c

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index c604213..d50519e 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -170,6 +170,7 @@ source "drivers/net/ethernet/sis/Kconfig"
 source "drivers/net/ethernet/sfc/Kconfig"
 source "drivers/net/ethernet/sgi/Kconfig"
 source "drivers/net/ethernet/smsc/Kconfig"
+source "drivers/net/ethernet/socionext/Kconfig"
 source "drivers/net/ethernet/stmicro/Kconfig"
 source "drivers/net/ethernet/sun/Kconfig"
 source "drivers/net/ethernet/tehuti/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 39f62733..6cf5ade 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_SFC) += sfc/
 obj-$(CONFIG_SFC_FALCON) += sfc/falcon/
 obj-$(CONFIG_NET_VENDOR_SGI) += sgi/
 obj-$(CONFIG_NET_VENDOR_SMSC) += smsc/
+obj-$(CONFIG_NET_VENDOR_SOCIONEXT) += socionext/
 obj-$(CONFIG_NET_VENDOR_STMICRO) += stmicro/
 obj-$(CONFIG_NET_VENDOR_SUN) += sun/
 obj-$(CONFIG_NET_VENDOR_TEHUTI) += tehuti/
diff --git a/drivers/net/ethernet/socionext/Kconfig b/drivers/net/ethernet/socionext/Kconfig
new file mode 100644
index 0000000..3a1829e
--- /dev/null
+++ b/drivers/net/ethernet/socionext/Kconfig
@@ -0,0 +1,22 @@
+config NET_VENDOR_SOCIONEXT
+	bool "Socionext ethernet drivers"
+	default y
+	---help---
+	  Option to select ethernet drivers for Socionext platforms.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Socionext devices. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_SOCIONEXT
+
+config SNI_AVE
+	tristate "Socionext AVE ethernet support"
+	depends on (ARCH_UNIPHIER || COMPILE_TEST) && OF
+	select PHYLIB
+	---help---
+	  Driver for gigabit ethernet MACs, called AVE, in the
+	  Socionext UniPhier family.
+
+endif #NET_VENDOR_SOCIONEXT
diff --git a/drivers/net/ethernet/socionext/Makefile b/drivers/net/ethernet/socionext/Makefile
new file mode 100644
index 0000000..ab83df6
--- /dev/null
+++ b/drivers/net/ethernet/socionext/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for all ethernet ip drivers on Socionext platforms
+#
+obj-$(CONFIG_SNI_AVE) += sni_ave.o
diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
new file mode 100644
index 0000000..7b293c2
--- /dev/null
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -0,0 +1,1744 @@
+/**
+ * sni_ave.c - Socionext UniPhier AVE ethernet driver
+ *
+ * Copyright 2014 Panasonic Corporation
+ * Copyright 2015-2017 Socionext Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#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 inline 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 = (id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr;
+
+	addr += entry * priv->desc_size + offset;
+
+	return readl(priv->base + addr);
+}
+
+static inline 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 inline 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 = (id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr;
+
+	addr += entry * priv->desc_size + offset;
+
+	writel(val, priv->base + addr);
+}
+
+static inline 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 inline 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 inline 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 inline void ave_irq_restore(struct net_device *ndev, u32 val)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	writel(val, priv->base + AVE_GIMR);
+}
+
+static inline 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 inline void ave_irq_disable(struct net_device *ndev, u32 bitflag)
+{
+	struct ave_private *priv = netdev_priv(ndev);
+
+	writel(readl(priv->base + AVE_GIMR) & ~bitflag, priv->base + AVE_GIMR);
+}
+
+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 = netdev_priv(ndev);
+	u32 mdioctl, mdiosr;
+	int ret;
+
+	/* 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 = netdev_priv(ndev);
+	u32 mdioctl, mdiosr;
+	int ret;
+
+	/* 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);
+	struct sk_buff *skb;
+	u32 proc_idx, done_idx, ndesc, cmdsts;
+	int restpkt, npkts;
+	unsigned int pktlen;
+	unsigned int rx_packets = 0;
+	unsigned int rx_bytes = 0;
+
+	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)
+{
+	int i;
+	unsigned char bcast_mac[ETH_ALEN];
+
+	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 ave_private *priv = netdev_priv(ndev);
+	struct device *dev = ndev->dev.parent;
+	struct device_node *np = dev->of_node, *mdio_np;
+	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
+	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 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 = netdev_mc_count(ndev);
+	u32 val;
+	static const u8 v4multi_macadr[6] = {
+		0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	static const u8 v6multi_macadr[6] = {
+		0x33, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+	/* MAC addr filter enable for promiscious mode */
+	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)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct ave_private *priv;
+	struct net_device *ndev;
+	struct resource	*res;
+	const struct ave_soc_data *data;
+	const void *mac_addr;
+	phy_interface_t phy_mode;
+	void __iomem *base;
+	u32 ave_id;
+	u64 dma_mask;
+	int irq, ret;
+	char buf[ETHTOOL_FWVERS_LEN];
+
+	data = of_device_get_match_data(dev);
+	if (WARN_ON(!data))
+		return -EINVAL;
+
+	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);
+
+	ret = register_netdev(ndev);
+	if (ret) {
+		dev_err(dev, "failed to register netdevice\n");
+		goto out_del_napi;
+	}
+
+	platform_set_drvdata(pdev, ndev);
+
+	/* 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");
-- 
2.7.4

Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Philippe Ombredanne]

Dear Kunihiko-san,

On Mon, Dec 11, 2017 at 8:57 AM, Kunihiko Hayashi
<hayashi.kunihiko@socionext.com> wrote:
> The UniPhier platform from Socionext provides the AVE ethernet
> controller that includes MAC and MDIO bus supporting RGMII/RMII
> modes. The controller is named AVE.
>
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
[...]
> --- /dev/null
> +++ b/drivers/net/ethernet/socionext/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0

You are correctly using SPDX ids here....

> +obj-$(CONFIG_SNI_AVE) += sni_ave.o
> diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
> new file mode 100644
> index 0000000..7b293c2
> --- /dev/null
> +++ b/drivers/net/ethernet/socionext/sni_ave.c
> @@ -0,0 +1,1744 @@
> +/**
> + * sni_ave.c - Socionext UniPhier AVE ethernet driver
> + *
> + * Copyright 2014 Panasonic Corporation
> + * Copyright 2015-2017 Socionext Inc.
> + *
> + * This program is free software: you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2  of
> + * the License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */

... then I guess you could also use them here, replacing at least 7
lines of boilerplate by a single id line?

> +// SDPX-License-Identifier: GPL-2.0

And if you go C++ style all the way, this could be even more compact:

> +// SDPX-License-Identifier: GPL-2.0
> +// sni_ave.c - Socionext UniPhier AVE ethernet driver
> +// Copyright 2014 Panasonic Corporation
> +// Copyright 2015-2017 Socionext Inc.

Thank you for your kind consideration!

-- 
Cordially
Philippe Ombredanne

Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Kunihiko Hayashi]

On Mon, 11 Dec 2017 10:19:15 +0100 Phlippe Ombredanne <pombredanne-od1rfyK75/E@public.gmane.org> wrote:

> Dear Kunihiko-san,
> 
> On Mon, Dec 11, 2017 at 8:57 AM, Kunihiko Hayashi
> <hayashi.kunihiko-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org> wrote:
> > The UniPhier platform from Socionext provides the AVE ethernet
> > controller that includes MAC and MDIO bus supporting RGMII/RMII
> > modes. The controller is named AVE.
> >
> > Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org>
> > Signed-off-by: Jassi Brar <jaswinder.singh-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> > Reviewed-by: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>
> [...]
> > --- /dev/null
> > +++ b/drivers/net/ethernet/socionext/Makefile
> > @@ -0,0 +1,5 @@
> > +# SPDX-License-Identifier: GPL-2.0
> 
> You are correctly using SPDX ids here....
> 
> > +obj-$(CONFIG_SNI_AVE) += sni_ave.o
> > diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
> > new file mode 100644
> > index 0000000..7b293c2
> > --- /dev/null
> > +++ b/drivers/net/ethernet/socionext/sni_ave.c
> > @@ -0,0 +1,1744 @@
> > +/**
> > + * sni_ave.c - Socionext UniPhier AVE ethernet driver
> > + *
> > + * Copyright 2014 Panasonic Corporation
> > + * Copyright 2015-2017 Socionext Inc.
> > + *
> > + * This program is free software: you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2  of
> > + * the License as published by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + * GNU General Public License for more details.
> > + */
> 
> ... then I guess you could also use them here, replacing at least 7
> lines of boilerplate by a single id line?
> 
> > +// SDPX-License-Identifier: GPL-2.0

Thank you for your kindly comment.

It seems there are few ethernet drivers applying SPDX-License-Identifier
to C source, then it has been difficult for me to decide whether to replace
boilerplate.

If it's no problem to apply SPDX to sources of ethernet drivers,
I'll replace it with the single line.

> And if you go C++ style all the way, this could be even more compact:
> 
> > +// SDPX-License-Identifier: GPL-2.0
> > +// sni_ave.c - Socionext UniPhier AVE ethernet driver
> > +// Copyright 2014 Panasonic Corporation
> > +// Copyright 2015-2017 Socionext Inc.

It's much simpler.
If it's reasonable to apply this style here, I can replace it, too.

Thank you,

---
Best Regards,
Kunihiko Hayashi


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Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Masami Hiramatsu]

Hello,

2017-12-11 21:04 GMT+09:00 Kunihiko Hayashi <hayashi.kunihiko-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org>:
> On Mon, 11 Dec 2017 10:19:15 +0100 Phlippe Ombredanne <pombredanne-od1rfyK75/E@public.gmane.org> wrote:
>
>> Dear Kunihiko-san,
>>
>> On Mon, Dec 11, 2017 at 8:57 AM, Kunihiko Hayashi
>> <hayashi.kunihiko-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org> wrote:
>> > The UniPhier platform from Socionext provides the AVE ethernet
>> > controller that includes MAC and MDIO bus supporting RGMII/RMII
>> > modes. The controller is named AVE.
>> >
>> > Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko-uWyLwvC0a2jby3iVrkZq2A@public.gmane.org>
>> > Signed-off-by: Jassi Brar <jaswinder.singh-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> > Reviewed-by: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>
>> [...]
>> > --- /dev/null
>> > +++ b/drivers/net/ethernet/socionext/Makefile
>> > @@ -0,0 +1,5 @@
>> > +# SPDX-License-Identifier: GPL-2.0
>>
>> You are correctly using SPDX ids here....
>>
>> > +obj-$(CONFIG_SNI_AVE) += sni_ave.o
>> > diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
>> > new file mode 100644
>> > index 0000000..7b293c2
>> > --- /dev/null
>> > +++ b/drivers/net/ethernet/socionext/sni_ave.c
>> > @@ -0,0 +1,1744 @@
>> > +/**
>> > + * sni_ave.c - Socionext UniPhier AVE ethernet driver
>> > + *
>> > + * Copyright 2014 Panasonic Corporation
>> > + * Copyright 2015-2017 Socionext Inc.
>> > + *
>> > + * This program is free software: you can redistribute it and/or modify
>> > + * it under the terms of the GNU General Public License version 2  of
>> > + * the License as published by the Free Software Foundation.
>> > + *
>> > + * This program is distributed in the hope that it will be useful,
>> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> > + * GNU General Public License for more details.
>> > + */
>>
>> ... then I guess you could also use them here, replacing at least 7
>> lines of boilerplate by a single id line?
>>
>> > +// SDPX-License-Identifier: GPL-2.0
>
> Thank you for your kindly comment.
>
> It seems there are few ethernet drivers applying SPDX-License-Identifier
> to C source, then it has been difficult for me to decide whether to replace
> boilerplate.
>
> If it's no problem to apply SPDX to sources of ethernet drivers,
> I'll replace it with the single line.
>
>> And if you go C++ style all the way, this could be even more compact:
>>
>> > +// SDPX-License-Identifier: GPL-2.0
>> > +// sni_ave.c - Socionext UniPhier AVE ethernet driver
>> > +// Copyright 2014 Panasonic Corporation
>> > +// Copyright 2015-2017 Socionext Inc.
>
> It's much simpler.
> If it's reasonable to apply this style here, I can replace it, too.

IMHO, even if we use SPDX license identifier, I recommend to use
C-style comments as many other files do, since it is C code.
If SPDX identifier requires C++ style, that is SPDX parser's issue
and should be fixed to get it from C-style comment.

https://spdx.org/sites/cpstandard/files/pages/files/using_spdx_license_list_short_identifiers.pdf

Anyway, SPDX.org itself shows C-style (short header) example. See page 6.

Thank you,

>
> Thank you,
>
> ---
> Best Regards,
> Kunihiko Hayashi
>
>



-- 
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Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Russell King - ARM Linux]

On Mon, Dec 11, 2017 at 10:34:17PM +0900, Masami Hiramatsu wrote:
> IMHO, even if we use SPDX license identifier, I recommend to use
> C-style comments as many other files do, since it is C code.
> If SPDX identifier requires C++ style, that is SPDX parser's issue
> and should be fixed to get it from C-style comment.

See the numerous emails on this subject already.  The issue of C
vs C++ comments has come up many times by many different people, but
the result is the same.  That's not going to happen.  Linux kernel
C files are required to use "//" for the SPDX identifier by order
of Linus Torvalds.

Linus has also revealed in that discussion that he has a preference
for "//" style commenting for single comments, so it seems that the
kernel coding style may change - but there is no desire for patches
to "clean up" single line comments to use "//".

For further information, and to see the discussion that has already
happened, the arguments that have been made about style, see the
threads for the patch series that tglx has been posting wrt documenting
the SPDX stuff for the kernel.

Thanks (let's stop rehashing the same arguments.)

-- 
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Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[David Miller]

From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Date: Mon, 11 Dec 2017 16:57:29 +0900

> +static inline u32 ave_desc_read(struct net_device *ndev, enum desc_id id,
> +				int entry, int offset)

Do not use inline functions in foo.c files, let the compiler decide what
to do.

Thank you.

Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Masami Hiramatsu]

Hi Russell,

2017-12-11 22:46 GMT+09:00 Russell King - ARM Linux <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>:
> On Mon, Dec 11, 2017 at 10:34:17PM +0900, Masami Hiramatsu wrote:
>> IMHO, even if we use SPDX license identifier, I recommend to use
>> C-style comments as many other files do, since it is C code.
>> If SPDX identifier requires C++ style, that is SPDX parser's issue
>> and should be fixed to get it from C-style comment.
>
> See the numerous emails on this subject already.  The issue of C
> vs C++ comments has come up many times by many different people, but
> the result is the same.  That's not going to happen.  Linux kernel
> C files are required to use "//" for the SPDX identifier by order
> of Linus Torvalds.

OK, I got it.

>
> Linus has also revealed in that discussion that he has a preference
> for "//" style commenting for single comments, so it seems that the
> kernel coding style may change - but there is no desire for patches
> to "clean up" single line comments to use "//".

Thank you for making it clear.

Then what I'm considering is copyright notice lines. Those are usually
treat as the header lines, not single line. So

> +// SDPX-License-Identifier: GPL-2.0
> +// sni_ave.c - Socionext UniPhier AVE ethernet driver
> +// Copyright 2014 Panasonic Corporation
> +// Copyright 2015-2017 Socionext Inc.

is acceptable? or should we keep C-style header lines for new drivers?

> +// SDPX-License-Identifier: GPL-2.0
> +/*
> + * sni_ave.c - Socionext UniPhier AVE ethernet driver
> + * Copyright 2014 Panasonic Corporation
> + * Copyright 2015-2017 Socionext Inc.
> + */

I just concern that those lines are not "single". that's all. :)

>
> For further information, and to see the discussion that has already
> happened, the arguments that have been made about style, see the
> threads for the patch series that tglx has been posting wrt documenting
> the SPDX stuff for the kernel.

OK, got it.

https://lkml.org/lkml/2017/11/16/663


Thanks,

>
> Thanks (let's stop rehashing the same arguments.)
>


-- 
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Re: [PATCH net-next v5 2/2] net: ethernet: socionext: add AVE ethernet driver

[Philippe Ombredanne]

Dear Masami-san,

On Tue, Dec 12, 2017 at 3:29 AM, Masami Hiramatsu
<masami.hiramatsu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:
[...]
> Then what I'm considering is copyright notice lines. Those are usually
> treat as the header lines, not single line. So
>
>> +// SDPX-License-Identifier: GPL-2.0
>> +// sni_ave.c - Socionext UniPhier AVE ethernet driver
>> +// Copyright 2014 Panasonic Corporation
>> +// Copyright 2015-2017 Socionext Inc.
>
> is acceptable? or should we keep C-style header lines for new drivers?
>
>> +// SDPX-License-Identifier: GPL-2.0
>> +/*
>> + * sni_ave.c - Socionext UniPhier AVE ethernet driver
>> + * Copyright 2014 Panasonic Corporation
>> + * Copyright 2015-2017 Socionext Inc.
>> + */
>
> I just concern that those lines are not "single". that's all. :)

My voice carries the weight of a down feather in this discussion and
to me the benefit of the first form is that you have removed two
lines. Both forms work fine.

-- 
Cordially
Philippe Ombredanne
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