Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3142 insertions, 0 deletions

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
new file mode 100644
index 000000000..50cb1c525
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -0,0 +1,3142 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2018 Microchip Technology Inc. */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/crc32.h>
+#include <linux/microchipphy.h>
+#include <linux/net_tstamp.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/rtnetlink.h>
+#include <linux/iopoll.h>
+#include <linux/crc16.h>
+#include "lan743x_main.h"
+#include "lan743x_ethtool.h"
+
+static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
+{
+	pci_release_selected_regions(adapter->pdev,
+				     pci_select_bars(adapter->pdev,
+						     IORESOURCE_MEM));
+	pci_disable_device(adapter->pdev);
+}
+
+static int lan743x_pci_init(struct lan743x_adapter *adapter,
+			    struct pci_dev *pdev)
+{
+	unsigned long bars = 0;
+	int ret;
+
+	adapter->pdev = pdev;
+	ret = pci_enable_device_mem(pdev);
+	if (ret)
+		goto return_error;
+
+	netif_info(adapter, probe, adapter->netdev,
+		   "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
+		   pdev->vendor, pdev->device);
+	bars = pci_select_bars(pdev, IORESOURCE_MEM);
+	if (!test_bit(0, &bars))
+		goto disable_device;
+
+	ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
+	if (ret)
+		goto disable_device;
+
+	pci_set_master(pdev);
+	return 0;
+
+disable_device:
+	pci_disable_device(adapter->pdev);
+
+return_error:
+	return ret;
+}
+
+u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
+{
+	return ioread32(&adapter->csr.csr_address[offset]);
+}
+
+void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
+		       u32 data)
+{
+	iowrite32(data, &adapter->csr.csr_address[offset]);
+}
+
+#define LAN743X_CSR_READ_OP(offset)	lan743x_csr_read(adapter, offset)
+
+static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
+{
+	u32 data;
+
+	data = lan743x_csr_read(adapter, HW_CFG);
+	data |= HW_CFG_LRST_;
+	lan743x_csr_write(adapter, HW_CFG, data);
+
+	return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
+				  !(data & HW_CFG_LRST_), 100000, 10000000);
+}
+
+static int lan743x_csr_wait_for_bit_atomic(struct lan743x_adapter *adapter,
+					   int offset, u32 bit_mask,
+					   int target_value, int udelay_min,
+					   int udelay_max, int count)
+{
+	u32 data;
+
+	return readx_poll_timeout_atomic(LAN743X_CSR_READ_OP, offset, data,
+					 target_value == !!(data & bit_mask),
+					 udelay_max, udelay_min * count);
+}
+
+static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
+				    int offset, u32 bit_mask,
+				    int target_value, int usleep_min,
+				    int usleep_max, int count)
+{
+	u32 data;
+
+	return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
+				  target_value == ((data & bit_mask) ? 1 : 0),
+				  usleep_max, usleep_min * count);
+}
+
+static int lan743x_csr_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_csr *csr = &adapter->csr;
+	resource_size_t bar_start, bar_length;
+	int result;
+
+	bar_start = pci_resource_start(adapter->pdev, 0);
+	bar_length = pci_resource_len(adapter->pdev, 0);
+	csr->csr_address = devm_ioremap(&adapter->pdev->dev,
+					bar_start, bar_length);
+	if (!csr->csr_address) {
+		result = -ENOMEM;
+		goto clean_up;
+	}
+
+	csr->id_rev = lan743x_csr_read(adapter, ID_REV);
+	csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
+	netif_info(adapter, probe, adapter->netdev,
+		   "ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
+		   csr->id_rev,	FPGA_REV_GET_MAJOR_(csr->fpga_rev),
+		   FPGA_REV_GET_MINOR_(csr->fpga_rev));
+	if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
+		result = -ENODEV;
+		goto clean_up;
+	}
+
+	csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
+	switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
+	case ID_REV_CHIP_REV_A0_:
+		csr->flags |= LAN743X_CSR_FLAG_IS_A0;
+		csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
+		break;
+	case ID_REV_CHIP_REV_B0_:
+		csr->flags |= LAN743X_CSR_FLAG_IS_B0;
+		break;
+	}
+
+	result = lan743x_csr_light_reset(adapter);
+	if (result)
+		goto clean_up;
+	return 0;
+clean_up:
+	return result;
+}
+
+static void lan743x_intr_software_isr(void *context)
+{
+	struct lan743x_adapter *adapter = context;
+	struct lan743x_intr *intr = &adapter->intr;
+	u32 int_sts;
+
+	int_sts = lan743x_csr_read(adapter, INT_STS);
+	if (int_sts & INT_BIT_SW_GP_) {
+		/* disable the interrupt to prevent repeated re-triggering */
+		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
+		intr->software_isr_flag = 1;
+	}
+}
+
+static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
+{
+	struct lan743x_tx *tx = context;
+	struct lan743x_adapter *adapter = tx->adapter;
+	bool enable_flag = true;
+
+	lan743x_csr_read(adapter, INT_EN_SET);
+	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
+		lan743x_csr_write(adapter, INT_EN_CLR,
+				  INT_BIT_DMA_TX_(tx->channel_number));
+	}
+
+	if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
+		u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
+		u32 dmac_int_sts;
+		u32 dmac_int_en;
+
+		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
+			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
+		else
+			dmac_int_sts = ioc_bit;
+		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
+			dmac_int_en = lan743x_csr_read(adapter,
+						       DMAC_INT_EN_SET);
+		else
+			dmac_int_en = ioc_bit;
+
+		dmac_int_en &= ioc_bit;
+		dmac_int_sts &= dmac_int_en;
+		if (dmac_int_sts & ioc_bit) {
+			napi_schedule(&tx->napi);
+			enable_flag = false;/* poll func will enable later */
+		}
+	}
+
+	if (enable_flag)
+		/* enable isr */
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_TX_(tx->channel_number));
+}
+
+static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
+{
+	struct lan743x_rx *rx = context;
+	struct lan743x_adapter *adapter = rx->adapter;
+	bool enable_flag = true;
+
+	if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
+		lan743x_csr_write(adapter, INT_EN_CLR,
+				  INT_BIT_DMA_RX_(rx->channel_number));
+	}
+
+	if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
+		u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
+		u32 dmac_int_sts;
+		u32 dmac_int_en;
+
+		if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
+			dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
+		else
+			dmac_int_sts = rx_frame_bit;
+		if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
+			dmac_int_en = lan743x_csr_read(adapter,
+						       DMAC_INT_EN_SET);
+		else
+			dmac_int_en = rx_frame_bit;
+
+		dmac_int_en &= rx_frame_bit;
+		dmac_int_sts &= dmac_int_en;
+		if (dmac_int_sts & rx_frame_bit) {
+			napi_schedule(&rx->napi);
+			enable_flag = false;/* poll funct will enable later */
+		}
+	}
+
+	if (enable_flag) {
+		/* enable isr */
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_RX_(rx->channel_number));
+	}
+}
+
+static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
+{
+	struct lan743x_adapter *adapter = context;
+	unsigned int channel;
+
+	if (int_sts & INT_BIT_ALL_RX_) {
+		for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
+			channel++) {
+			u32 int_bit = INT_BIT_DMA_RX_(channel);
+
+			if (int_sts & int_bit) {
+				lan743x_rx_isr(&adapter->rx[channel],
+					       int_bit, flags);
+				int_sts &= ~int_bit;
+			}
+		}
+	}
+	if (int_sts & INT_BIT_ALL_TX_) {
+		for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
+			channel++) {
+			u32 int_bit = INT_BIT_DMA_TX_(channel);
+
+			if (int_sts & int_bit) {
+				lan743x_tx_isr(&adapter->tx[channel],
+					       int_bit, flags);
+				int_sts &= ~int_bit;
+			}
+		}
+	}
+	if (int_sts & INT_BIT_ALL_OTHER_) {
+		if (int_sts & INT_BIT_SW_GP_) {
+			lan743x_intr_software_isr(adapter);
+			int_sts &= ~INT_BIT_SW_GP_;
+		}
+		if (int_sts & INT_BIT_1588_) {
+			lan743x_ptp_isr(adapter);
+			int_sts &= ~INT_BIT_1588_;
+		}
+	}
+	if (int_sts)
+		lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
+}
+
+static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
+{
+	struct lan743x_vector *vector = ptr;
+	struct lan743x_adapter *adapter = vector->adapter;
+	irqreturn_t result = IRQ_NONE;
+	u32 int_enables;
+	u32 int_sts;
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
+		int_sts = lan743x_csr_read(adapter, INT_STS);
+	} else if (vector->flags &
+		   (LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
+		   LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
+		int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
+	} else {
+		/* use mask as implied status */
+		int_sts = vector->int_mask | INT_BIT_MAS_;
+	}
+
+	if (!(int_sts & INT_BIT_MAS_))
+		goto irq_done;
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
+		/* disable vector interrupt */
+		lan743x_csr_write(adapter,
+				  INT_VEC_EN_CLR,
+				  INT_VEC_EN_(vector->vector_index));
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
+		/* disable master interrupt */
+		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
+		int_enables = lan743x_csr_read(adapter, INT_EN_SET);
+	} else {
+		/*  use vector mask as implied enable mask */
+		int_enables = vector->int_mask;
+	}
+
+	int_sts &= int_enables;
+	int_sts &= vector->int_mask;
+	if (int_sts) {
+		if (vector->handler) {
+			vector->handler(vector->context,
+					int_sts, vector->flags);
+		} else {
+			/* disable interrupts on this vector */
+			lan743x_csr_write(adapter, INT_EN_CLR,
+					  vector->int_mask);
+		}
+		result = IRQ_HANDLED;
+	}
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
+		/* enable master interrupt */
+		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+
+	if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
+		/* enable vector interrupt */
+		lan743x_csr_write(adapter,
+				  INT_VEC_EN_SET,
+				  INT_VEC_EN_(vector->vector_index));
+irq_done:
+	return result;
+}
+
+static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
+{
+	struct lan743x_intr *intr = &adapter->intr;
+	int result = -ENODEV;
+	int timeout = 10;
+
+	intr->software_isr_flag = 0;
+
+	/* enable interrupt */
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
+
+	/* activate interrupt here */
+	lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
+	while ((timeout > 0) && (!(intr->software_isr_flag))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+
+	if (intr->software_isr_flag)
+		result = 0;
+
+	/* disable interrupts */
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
+	return result;
+}
+
+static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
+				     int vector_index, u32 flags,
+				     u32 int_mask,
+				     lan743x_vector_handler handler,
+				     void *context)
+{
+	struct lan743x_vector *vector = &adapter->intr.vector_list
+					[vector_index];
+	int ret;
+
+	vector->adapter = adapter;
+	vector->flags = flags;
+	vector->vector_index = vector_index;
+	vector->int_mask = int_mask;
+	vector->handler = handler;
+	vector->context = context;
+
+	ret = request_irq(vector->irq,
+			  lan743x_intr_entry_isr,
+			  (flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
+			  IRQF_SHARED : 0, DRIVER_NAME, vector);
+	if (ret) {
+		vector->handler = NULL;
+		vector->context = NULL;
+		vector->int_mask = 0;
+		vector->flags = 0;
+	}
+	return ret;
+}
+
+static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
+					int vector_index)
+{
+	struct lan743x_vector *vector = &adapter->intr.vector_list
+					[vector_index];
+
+	free_irq(vector->irq, vector);
+	vector->handler = NULL;
+	vector->context = NULL;
+	vector->int_mask = 0;
+	vector->flags = 0;
+}
+
+static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
+					 u32 int_mask)
+{
+	int index;
+
+	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
+		if (adapter->intr.vector_list[index].int_mask & int_mask)
+			return adapter->intr.vector_list[index].flags;
+	}
+	return 0;
+}
+
+static void lan743x_intr_close(struct lan743x_adapter *adapter)
+{
+	struct lan743x_intr *intr = &adapter->intr;
+	int index = 0;
+
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
+	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
+
+	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
+		if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
+			lan743x_intr_unregister_isr(adapter, index);
+			intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
+		}
+	}
+
+	if (intr->flags & INTR_FLAG_MSI_ENABLED) {
+		pci_disable_msi(adapter->pdev);
+		intr->flags &= ~INTR_FLAG_MSI_ENABLED;
+	}
+
+	if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
+		pci_disable_msix(adapter->pdev);
+		intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
+	}
+}
+
+static int lan743x_intr_open(struct lan743x_adapter *adapter)
+{
+	struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
+	struct lan743x_intr *intr = &adapter->intr;
+	u32 int_vec_en_auto_clr = 0;
+	u32 int_vec_map0 = 0;
+	u32 int_vec_map1 = 0;
+	int ret = -ENODEV;
+	int index = 0;
+	u32 flags = 0;
+
+	intr->number_of_vectors = 0;
+
+	/* Try to set up MSIX interrupts */
+	memset(&msix_entries[0], 0,
+	       sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
+	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
+		msix_entries[index].entry = index;
+	ret = pci_enable_msix_range(adapter->pdev,
+				    msix_entries, 1,
+				    1 + LAN743X_USED_TX_CHANNELS +
+				    LAN743X_USED_RX_CHANNELS);
+
+	if (ret > 0) {
+		intr->flags |= INTR_FLAG_MSIX_ENABLED;
+		intr->number_of_vectors = ret;
+		intr->using_vectors = true;
+		for (index = 0; index < intr->number_of_vectors; index++)
+			intr->vector_list[index].irq = msix_entries
+						       [index].vector;
+		netif_info(adapter, ifup, adapter->netdev,
+			   "using MSIX interrupts, number of vectors = %d\n",
+			   intr->number_of_vectors);
+	}
+
+	/* If MSIX failed try to setup using MSI interrupts */
+	if (!intr->number_of_vectors) {
+		if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
+			if (!pci_enable_msi(adapter->pdev)) {
+				intr->flags |= INTR_FLAG_MSI_ENABLED;
+				intr->number_of_vectors = 1;
+				intr->using_vectors = true;
+				intr->vector_list[0].irq =
+					adapter->pdev->irq;
+				netif_info(adapter, ifup, adapter->netdev,
+					   "using MSI interrupts, number of vectors = %d\n",
+					   intr->number_of_vectors);
+			}
+		}
+	}
+
+	/* If MSIX, and MSI failed, setup using legacy interrupt */
+	if (!intr->number_of_vectors) {
+		intr->number_of_vectors = 1;
+		intr->using_vectors = false;
+		intr->vector_list[0].irq = intr->irq;
+		netif_info(adapter, ifup, adapter->netdev,
+			   "using legacy interrupts\n");
+	}
+
+	/* At this point we must have at least one irq */
+	lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
+
+	/* map all interrupts to vector 0 */
+	lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
+	lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
+	lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
+	flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
+		LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
+		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
+		LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
+
+	if (intr->using_vectors) {
+		flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
+			 LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
+	} else {
+		flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
+			 LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
+			 LAN743X_VECTOR_FLAG_IRQ_SHARED;
+	}
+
+	if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
+		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
+		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
+		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
+		flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
+		flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
+		flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
+	}
+
+	ret = lan743x_intr_register_isr(adapter, 0, flags,
+					INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
+					INT_BIT_ALL_OTHER_,
+					lan743x_intr_shared_isr, adapter);
+	if (ret)
+		goto clean_up;
+	intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
+
+	if (intr->using_vectors)
+		lan743x_csr_write(adapter, INT_VEC_EN_SET,
+				  INT_VEC_EN_(0));
+
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
+		lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
+		lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
+		lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
+		lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
+	}
+
+	/* enable interrupts */
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+	ret = lan743x_intr_test_isr(adapter);
+	if (ret)
+		goto clean_up;
+
+	if (intr->number_of_vectors > 1) {
+		int number_of_tx_vectors = intr->number_of_vectors - 1;
+
+		if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
+			number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
+		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
+			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
+			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
+			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
+			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
+			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
+
+		if (adapter->csr.flags &
+		   LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
+			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
+				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
+				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
+				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
+		}
+
+		for (index = 0; index < number_of_tx_vectors; index++) {
+			u32 int_bit = INT_BIT_DMA_TX_(index);
+			int vector = index + 1;
+
+			/* map TX interrupt to vector */
+			int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
+			lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
+
+			/* Remove TX interrupt from shared mask */
+			intr->vector_list[0].int_mask &= ~int_bit;
+			ret = lan743x_intr_register_isr(adapter, vector, flags,
+							int_bit, lan743x_tx_isr,
+							&adapter->tx[index]);
+			if (ret)
+				goto clean_up;
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
+			if (!(flags &
+			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
+				lan743x_csr_write(adapter, INT_VEC_EN_SET,
+						  INT_VEC_EN_(vector));
+		}
+	}
+	if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
+		int number_of_rx_vectors = intr->number_of_vectors -
+					   LAN743X_USED_TX_CHANNELS - 1;
+
+		if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
+			number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
+
+		flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
+			LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
+			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
+			LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
+			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
+			LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
+
+		if (adapter->csr.flags &
+		    LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
+			flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
+				LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
+				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
+				LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
+				LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
+		}
+		for (index = 0; index < number_of_rx_vectors; index++) {
+			int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
+			u32 int_bit = INT_BIT_DMA_RX_(index);
+
+			/* map RX interrupt to vector */
+			int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
+			lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
+			if (flags &
+			    LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
+				int_vec_en_auto_clr |= INT_VEC_EN_(vector);
+				lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
+						  int_vec_en_auto_clr);
+			}
+
+			/* Remove RX interrupt from shared mask */
+			intr->vector_list[0].int_mask &= ~int_bit;
+			ret = lan743x_intr_register_isr(adapter, vector, flags,
+							int_bit, lan743x_rx_isr,
+							&adapter->rx[index]);
+			if (ret)
+				goto clean_up;
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
+
+			lan743x_csr_write(adapter, INT_VEC_EN_SET,
+					  INT_VEC_EN_(vector));
+		}
+	}
+	return 0;
+
+clean_up:
+	lan743x_intr_close(adapter);
+	return ret;
+}
+
+static int lan743x_dp_write(struct lan743x_adapter *adapter,
+			    u32 select, u32 addr, u32 length, u32 *buf)
+{
+	u32 dp_sel;
+	int i;
+
+	if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, DP_SEL_DPRDY_,
+					    1, 40, 100, 100))
+		return -EIO;
+	dp_sel = lan743x_csr_read(adapter, DP_SEL);
+	dp_sel &= ~DP_SEL_MASK_;
+	dp_sel |= select;
+	lan743x_csr_write(adapter, DP_SEL, dp_sel);
+
+	for (i = 0; i < length; i++) {
+		lan743x_csr_write(adapter, DP_ADDR, addr + i);
+		lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
+		lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
+		if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL,
+						    DP_SEL_DPRDY_,
+						    1, 40, 100, 100))
+			return -EIO;
+	}
+
+	return 0;
+}
+
+static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
+{
+	u32 ret;
+
+	ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
+		MAC_MII_ACC_PHY_ADDR_MASK_;
+	ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
+		MAC_MII_ACC_MIIRINDA_MASK_;
+
+	if (read)
+		ret |= MAC_MII_ACC_MII_READ_;
+	else
+		ret |= MAC_MII_ACC_MII_WRITE_;
+	ret |= MAC_MII_ACC_MII_BUSY_;
+
+	return ret;
+}
+
+static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
+{
+	u32 data;
+
+	return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
+				  !(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
+}
+
+static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
+{
+	struct lan743x_adapter *adapter = bus->priv;
+	u32 val, mii_access;
+	int ret;
+
+	/* comfirm MII not busy */
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		return ret;
+
+	/* set the address, index & direction (read from PHY) */
+	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
+	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		return ret;
+
+	val = lan743x_csr_read(adapter, MAC_MII_DATA);
+	return (int)(val & 0xFFFF);
+}
+
+static int lan743x_mdiobus_write(struct mii_bus *bus,
+				 int phy_id, int index, u16 regval)
+{
+	struct lan743x_adapter *adapter = bus->priv;
+	u32 val, mii_access;
+	int ret;
+
+	/* confirm MII not busy */
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		return ret;
+	val = (u32)regval;
+	lan743x_csr_write(adapter, MAC_MII_DATA, val);
+
+	/* set the address, index & direction (write to PHY) */
+	mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
+	lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	return ret;
+}
+
+static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
+				    u8 *addr)
+{
+	u32 addr_lo, addr_hi;
+
+	addr_lo = addr[0] |
+		addr[1] << 8 |
+		addr[2] << 16 |
+		addr[3] << 24;
+	addr_hi = addr[4] |
+		addr[5] << 8;
+	lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
+	lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
+
+	ether_addr_copy(adapter->mac_address, addr);
+	netif_info(adapter, drv, adapter->netdev,
+		   "MAC address set to %pM\n", addr);
+}
+
+static int lan743x_mac_init(struct lan743x_adapter *adapter)
+{
+	bool mac_address_valid = true;
+	struct net_device *netdev;
+	u32 mac_addr_hi = 0;
+	u32 mac_addr_lo = 0;
+	u32 data;
+
+	netdev = adapter->netdev;
+
+	/* disable auto duplex, and speed detection. Phylib does that */
+	data = lan743x_csr_read(adapter, MAC_CR);
+	data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
+	data |= MAC_CR_CNTR_RST_;
+	lan743x_csr_write(adapter, MAC_CR, data);
+
+	if (!is_valid_ether_addr(adapter->mac_address)) {
+		mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
+		mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
+		adapter->mac_address[0] = mac_addr_lo & 0xFF;
+		adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
+		adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
+		adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
+		adapter->mac_address[4] = mac_addr_hi & 0xFF;
+		adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
+
+		if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
+		    mac_addr_lo == 0xFFFFFFFF) {
+			mac_address_valid = false;
+		} else if (!is_valid_ether_addr(adapter->mac_address)) {
+			mac_address_valid = false;
+		}
+
+		if (!mac_address_valid)
+			eth_random_addr(adapter->mac_address);
+	}
+	lan743x_mac_set_address(adapter, adapter->mac_address);
+	ether_addr_copy(netdev->dev_addr, adapter->mac_address);
+
+	return 0;
+}
+
+static int lan743x_mac_open(struct lan743x_adapter *adapter)
+{
+	int ret = 0;
+	u32 temp;
+
+	temp = lan743x_csr_read(adapter, MAC_RX);
+	lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
+	temp = lan743x_csr_read(adapter, MAC_TX);
+	lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
+	return ret;
+}
+
+static void lan743x_mac_close(struct lan743x_adapter *adapter)
+{
+	u32 temp;
+
+	temp = lan743x_csr_read(adapter, MAC_TX);
+	temp &= ~MAC_TX_TXEN_;
+	lan743x_csr_write(adapter, MAC_TX, temp);
+	lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
+				 1, 1000, 20000, 100);
+
+	temp = lan743x_csr_read(adapter, MAC_RX);
+	temp &= ~MAC_RX_RXEN_;
+	lan743x_csr_write(adapter, MAC_RX, temp);
+	lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
+				 1, 1000, 20000, 100);
+}
+
+static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
+					      bool tx_enable, bool rx_enable)
+{
+	u32 flow_setting = 0;
+
+	/* set maximum pause time because when fifo space frees
+	 * up a zero value pause frame will be sent to release the pause
+	 */
+	flow_setting = MAC_FLOW_CR_FCPT_MASK_;
+	if (tx_enable)
+		flow_setting |= MAC_FLOW_CR_TX_FCEN_;
+	if (rx_enable)
+		flow_setting |= MAC_FLOW_CR_RX_FCEN_;
+	lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
+}
+
+static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
+{
+	int enabled = 0;
+	u32 mac_rx = 0;
+
+	mac_rx = lan743x_csr_read(adapter, MAC_RX);
+	if (mac_rx & MAC_RX_RXEN_) {
+		enabled = 1;
+		if (mac_rx & MAC_RX_RXD_) {
+			lan743x_csr_write(adapter, MAC_RX, mac_rx);
+			mac_rx &= ~MAC_RX_RXD_;
+		}
+		mac_rx &= ~MAC_RX_RXEN_;
+		lan743x_csr_write(adapter, MAC_RX, mac_rx);
+		lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
+					 1, 1000, 20000, 100);
+		lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
+	}
+
+	mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
+	mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
+		  MAC_RX_MAX_SIZE_MASK_);
+	lan743x_csr_write(adapter, MAC_RX, mac_rx);
+
+	if (enabled) {
+		mac_rx |= MAC_RX_RXEN_;
+		lan743x_csr_write(adapter, MAC_RX, mac_rx);
+	}
+	return 0;
+}
+
+/* PHY */
+static int lan743x_phy_reset(struct lan743x_adapter *adapter)
+{
+	u32 data;
+
+	/* Only called with in probe, and before mdiobus_register */
+
+	data = lan743x_csr_read(adapter, PMT_CTL);
+	data |= PMT_CTL_ETH_PHY_RST_;
+	lan743x_csr_write(adapter, PMT_CTL, data);
+
+	return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
+				  (!(data & PMT_CTL_ETH_PHY_RST_) &&
+				  (data & PMT_CTL_READY_)),
+				  50000, 1000000);
+}
+
+static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
+					   u16 local_adv, u16 remote_adv)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+	u8 cap;
+
+	if (phy->fc_autoneg)
+		cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
+	else
+		cap = phy->fc_request_control;
+
+	lan743x_mac_flow_ctrl_set_enables(adapter,
+					  cap & FLOW_CTRL_TX,
+					  cap & FLOW_CTRL_RX);
+}
+
+static int lan743x_phy_init(struct lan743x_adapter *adapter)
+{
+	return lan743x_phy_reset(adapter);
+}
+
+static void lan743x_phy_link_status_change(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct phy_device *phydev = netdev->phydev;
+	u32 data;
+
+	phy_print_status(phydev);
+	if (phydev->state == PHY_RUNNING) {
+		int remote_advertisement = 0;
+		int local_advertisement = 0;
+
+		data = lan743x_csr_read(adapter, MAC_CR);
+
+		/* set interface mode */
+		if (phy_interface_mode_is_rgmii(adapter->phy_mode))
+			/* RGMII */
+			data &= ~MAC_CR_MII_EN_;
+		else
+			/* GMII */
+			data |= MAC_CR_MII_EN_;
+
+		/* set duplex mode */
+		if (phydev->duplex)
+			data |= MAC_CR_DPX_;
+		else
+			data &= ~MAC_CR_DPX_;
+
+		/* set bus speed */
+		switch (phydev->speed) {
+		case SPEED_10:
+			data &= ~MAC_CR_CFG_H_;
+			data &= ~MAC_CR_CFG_L_;
+		break;
+		case SPEED_100:
+			data &= ~MAC_CR_CFG_H_;
+			data |= MAC_CR_CFG_L_;
+		break;
+		case SPEED_1000:
+			data |= MAC_CR_CFG_H_;
+			data &= ~MAC_CR_CFG_L_;
+		break;
+		}
+		lan743x_csr_write(adapter, MAC_CR, data);
+
+		local_advertisement =
+			linkmode_adv_to_mii_adv_t(phydev->advertising);
+		remote_advertisement =
+			linkmode_adv_to_mii_adv_t(phydev->lp_advertising);
+
+		lan743x_phy_update_flowcontrol(adapter, local_advertisement,
+					       remote_advertisement);
+		lan743x_ptp_update_latency(adapter, phydev->speed);
+	}
+}
+
+static void lan743x_phy_close(struct lan743x_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+
+	phy_stop(netdev->phydev);
+	phy_disconnect(netdev->phydev);
+	netdev->phydev = NULL;
+}
+
+static int lan743x_phy_open(struct lan743x_adapter *adapter)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+	struct phy_device *phydev = NULL;
+	struct device_node *phynode;
+	struct net_device *netdev;
+	int ret = -EIO;
+
+	netdev = adapter->netdev;
+	phynode = of_node_get(adapter->pdev->dev.of_node);
+
+	if (phynode) {
+		/* try devicetree phy, or fixed link */
+		of_get_phy_mode(phynode, &adapter->phy_mode);
+
+		if (of_phy_is_fixed_link(phynode)) {
+			ret = of_phy_register_fixed_link(phynode);
+			if (ret) {
+				netdev_err(netdev,
+					   "cannot register fixed PHY\n");
+				of_node_put(phynode);
+				goto return_error;
+			}
+		}
+		phydev = of_phy_connect(netdev, phynode,
+					lan743x_phy_link_status_change, 0,
+					adapter->phy_mode);
+		of_node_put(phynode);
+	}
+
+	if (!phydev) {
+		/* try internal phy */
+		phydev = phy_find_first(adapter->mdiobus);
+		if (!phydev)
+			goto return_error;
+
+		adapter->phy_mode = PHY_INTERFACE_MODE_GMII;
+		ret = phy_connect_direct(netdev, phydev,
+					 lan743x_phy_link_status_change,
+					 adapter->phy_mode);
+		if (ret)
+			goto return_error;
+	}
+
+	/* MAC doesn't support 1000T Half */
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+
+	/* support both flow controls */
+	phy_support_asym_pause(phydev);
+	phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
+	phy->fc_autoneg = phydev->autoneg;
+
+	phy_start(phydev);
+	phy_start_aneg(phydev);
+	return 0;
+
+return_error:
+	return ret;
+}
+
+static void lan743x_rfe_open(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, RFE_RSS_CFG,
+		RFE_RSS_CFG_UDP_IPV6_EX_ |
+		RFE_RSS_CFG_TCP_IPV6_EX_ |
+		RFE_RSS_CFG_IPV6_EX_ |
+		RFE_RSS_CFG_UDP_IPV6_ |
+		RFE_RSS_CFG_TCP_IPV6_ |
+		RFE_RSS_CFG_IPV6_ |
+		RFE_RSS_CFG_UDP_IPV4_ |
+		RFE_RSS_CFG_TCP_IPV4_ |
+		RFE_RSS_CFG_IPV4_ |
+		RFE_RSS_CFG_VALID_HASH_BITS_ |
+		RFE_RSS_CFG_RSS_QUEUE_ENABLE_ |
+		RFE_RSS_CFG_RSS_HASH_STORE_ |
+		RFE_RSS_CFG_RSS_ENABLE_);
+}
+
+static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
+{
+	u8 *mac_addr;
+	u32 mac_addr_hi = 0;
+	u32 mac_addr_lo = 0;
+
+	/* Add mac address to perfect Filter */
+	mac_addr = adapter->mac_address;
+	mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
+		      (((u32)(mac_addr[1])) << 8) |
+		      (((u32)(mac_addr[2])) << 16) |
+		      (((u32)(mac_addr[3])) << 24));
+	mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
+		      (((u32)(mac_addr[5])) << 8));
+
+	lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
+	lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
+			  mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
+}
+
+static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	u32 hash_table[DP_SEL_VHF_HASH_LEN];
+	u32 rfctl;
+	u32 data;
+
+	rfctl = lan743x_csr_read(adapter, RFE_CTL);
+	rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
+		 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
+	rfctl |= RFE_CTL_AB_;
+	if (netdev->flags & IFF_PROMISC) {
+		rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
+	} else {
+		if (netdev->flags & IFF_ALLMULTI)
+			rfctl |= RFE_CTL_AM_;
+	}
+
+	memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
+	if (netdev_mc_count(netdev)) {
+		struct netdev_hw_addr *ha;
+		int i;
+
+		rfctl |= RFE_CTL_DA_PERFECT_;
+		i = 1;
+		netdev_for_each_mc_addr(ha, netdev) {
+			/* set first 32 into Perfect Filter */
+			if (i < 33) {
+				lan743x_csr_write(adapter,
+						  RFE_ADDR_FILT_HI(i), 0);
+				data = ha->addr[3];
+				data = ha->addr[2] | (data << 8);
+				data = ha->addr[1] | (data << 8);
+				data = ha->addr[0] | (data << 8);
+				lan743x_csr_write(adapter,
+						  RFE_ADDR_FILT_LO(i), data);
+				data = ha->addr[5];
+				data = ha->addr[4] | (data << 8);
+				data |= RFE_ADDR_FILT_HI_VALID_;
+				lan743x_csr_write(adapter,
+						  RFE_ADDR_FILT_HI(i), data);
+			} else {
+				u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
+					     23) & 0x1FF;
+				hash_table[bitnum / 32] |= (1 << (bitnum % 32));
+				rfctl |= RFE_CTL_MCAST_HASH_;
+			}
+			i++;
+		}
+	}
+
+	lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
+			 DP_SEL_VHF_VLAN_LEN,
+			 DP_SEL_VHF_HASH_LEN, hash_table);
+	lan743x_csr_write(adapter, RFE_CTL, rfctl);
+}
+
+static int lan743x_dmac_init(struct lan743x_adapter *adapter)
+{
+	u32 data = 0;
+
+	lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
+	lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
+				 0, 1000, 20000, 100);
+	switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
+	case DMA_DESCRIPTOR_SPACING_16:
+		data = DMAC_CFG_MAX_DSPACE_16_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_32:
+		data = DMAC_CFG_MAX_DSPACE_32_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_64:
+		data = DMAC_CFG_MAX_DSPACE_64_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_128:
+		data = DMAC_CFG_MAX_DSPACE_128_;
+		break;
+	default:
+		return -EPERM;
+	}
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
+		data |= DMAC_CFG_COAL_EN_;
+	data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
+	data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
+	lan743x_csr_write(adapter, DMAC_CFG, data);
+	data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
+	data |= DMAC_COAL_CFG_TIMER_TX_START_;
+	data |= DMAC_COAL_CFG_FLUSH_INTS_;
+	data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
+	data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
+	data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
+	data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
+	lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
+	data = DMAC_OBFF_TX_THRES_SET_(0x08);
+	data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
+	lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
+	return 0;
+}
+
+static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
+				     int tx_channel)
+{
+	u32 dmac_cmd = 0;
+
+	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
+	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
+				      DMAC_CMD_START_T_(tx_channel)),
+				      (dmac_cmd &
+				      DMAC_CMD_STOP_T_(tx_channel)));
+}
+
+static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
+					     int tx_channel)
+{
+	int timeout = 100;
+	int result = 0;
+
+	while (timeout &&
+	       ((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
+	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
+		result = -ENODEV;
+	return result;
+}
+
+static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
+				     int rx_channel)
+{
+	u32 dmac_cmd = 0;
+
+	dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
+	return DMAC_CHANNEL_STATE_SET((dmac_cmd &
+				      DMAC_CMD_START_R_(rx_channel)),
+				      (dmac_cmd &
+				      DMAC_CMD_STOP_R_(rx_channel)));
+}
+
+static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
+					     int rx_channel)
+{
+	int timeout = 100;
+	int result = 0;
+
+	while (timeout &&
+	       ((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
+	       DMAC_CHANNEL_STATE_STOP_PENDING)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
+		result = -ENODEV;
+	return result;
+}
+
+static void lan743x_tx_release_desc(struct lan743x_tx *tx,
+				    int descriptor_index, bool cleanup)
+{
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	struct lan743x_tx_descriptor *descriptor = NULL;
+	u32 descriptor_type = 0;
+	bool ignore_sync;
+
+	descriptor = &tx->ring_cpu_ptr[descriptor_index];
+	buffer_info = &tx->buffer_info[descriptor_index];
+	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
+		goto done;
+
+	descriptor_type = le32_to_cpu(descriptor->data0) &
+			  TX_DESC_DATA0_DTYPE_MASK_;
+	if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
+		goto clean_up_data_descriptor;
+	else
+		goto clear_active;
+
+clean_up_data_descriptor:
+	if (buffer_info->dma_ptr) {
+		if (buffer_info->flags &
+		    TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
+			dma_unmap_page(&tx->adapter->pdev->dev,
+				       buffer_info->dma_ptr,
+				       buffer_info->buffer_length,
+				       DMA_TO_DEVICE);
+		} else {
+			dma_unmap_single(&tx->adapter->pdev->dev,
+					 buffer_info->dma_ptr,
+					 buffer_info->buffer_length,
+					 DMA_TO_DEVICE);
+		}
+		buffer_info->dma_ptr = 0;
+		buffer_info->buffer_length = 0;
+	}
+	if (!buffer_info->skb)
+		goto clear_active;
+
+	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) {
+		dev_kfree_skb_any(buffer_info->skb);
+		goto clear_skb;
+	}
+
+	if (cleanup) {
+		lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
+		dev_kfree_skb_any(buffer_info->skb);
+	} else {
+		ignore_sync = (buffer_info->flags &
+			       TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0;
+		lan743x_ptp_tx_timestamp_skb(tx->adapter,
+					     buffer_info->skb, ignore_sync);
+	}
+
+clear_skb:
+	buffer_info->skb = NULL;
+
+clear_active:
+	buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
+
+done:
+	memset(buffer_info, 0, sizeof(*buffer_info));
+	memset(descriptor, 0, sizeof(*descriptor));
+}
+
+static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
+{
+	return ((++index) % tx->ring_size);
+}
+
+static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
+{
+	while (le32_to_cpu(*tx->head_cpu_ptr) != (tx->last_head)) {
+		lan743x_tx_release_desc(tx, tx->last_head, false);
+		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
+	}
+}
+
+static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
+{
+	u32 original_head = 0;
+
+	original_head = tx->last_head;
+	do {
+		lan743x_tx_release_desc(tx, tx->last_head, true);
+		tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
+	} while (tx->last_head != original_head);
+	memset(tx->ring_cpu_ptr, 0,
+	       sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
+	memset(tx->buffer_info, 0,
+	       sizeof(*tx->buffer_info) * (tx->ring_size));
+}
+
+static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
+				   struct sk_buff *skb)
+{
+	int result = 1; /* 1 for the main skb buffer */
+	int nr_frags = 0;
+
+	if (skb_is_gso(skb))
+		result++; /* requires an extension descriptor */
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	result += nr_frags; /* 1 for each fragment buffer */
+	return result;
+}
+
+static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
+{
+	int last_head = tx->last_head;
+	int last_tail = tx->last_tail;
+
+	if (last_tail >= last_head)
+		return tx->ring_size - last_tail + last_head - 1;
+	else
+		return last_head - last_tail - 1;
+}
+
+void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx,
+				      bool enable_timestamping,
+				      bool enable_onestep_sync)
+{
+	if (enable_timestamping)
+		tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED;
+	else
+		tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED;
+	if (enable_onestep_sync)
+		tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC;
+	else
+		tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC;
+}
+
+static int lan743x_tx_frame_start(struct lan743x_tx *tx,
+				  unsigned char *first_buffer,
+				  unsigned int first_buffer_length,
+				  unsigned int frame_length,
+				  bool time_stamp,
+				  bool check_sum)
+{
+	/* called only from within lan743x_tx_xmit_frame.
+	 * assuming tx->ring_lock has already been acquired.
+	 */
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct device *dev = &adapter->pdev->dev;
+	dma_addr_t dma_ptr;
+
+	tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
+	tx->frame_first = tx->last_tail;
+	tx->frame_tail = tx->frame_first;
+
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	buffer_info = &tx->buffer_info[tx->frame_tail];
+	dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
+				 DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, dma_ptr))
+		return -ENOMEM;
+
+	tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
+	tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
+	tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
+		TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
+
+	buffer_info->skb = NULL;
+	buffer_info->dma_ptr = dma_ptr;
+	buffer_info->buffer_length = first_buffer_length;
+	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
+
+	tx->frame_data0 = (first_buffer_length &
+		TX_DESC_DATA0_BUF_LENGTH_MASK_) |
+		TX_DESC_DATA0_DTYPE_DATA_ |
+		TX_DESC_DATA0_FS_ |
+		TX_DESC_DATA0_FCS_;
+	if (time_stamp)
+		tx->frame_data0 |= TX_DESC_DATA0_TSE_;
+
+	if (check_sum)
+		tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
+				   TX_DESC_DATA0_IPE_ |
+				   TX_DESC_DATA0_TPE_;
+
+	/* data0 will be programmed in one of other frame assembler functions */
+	return 0;
+}
+
+static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
+				     unsigned int frame_length,
+				     int nr_frags)
+{
+	/* called only from within lan743x_tx_xmit_frame.
+	 * assuming tx->ring_lock has already been acquired.
+	 */
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+
+	/* wrap up previous descriptor */
+	tx->frame_data0 |= TX_DESC_DATA0_EXT_;
+	if (nr_frags <= 0) {
+		tx->frame_data0 |= TX_DESC_DATA0_LS_;
+		tx->frame_data0 |= TX_DESC_DATA0_IOC_;
+	}
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
+
+	/* move to next descriptor */
+	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	buffer_info = &tx->buffer_info[tx->frame_tail];
+
+	/* add extension descriptor */
+	tx_descriptor->data1 = 0;
+	tx_descriptor->data2 = 0;
+	tx_descriptor->data3 = 0;
+
+	buffer_info->skb = NULL;
+	buffer_info->dma_ptr = 0;
+	buffer_info->buffer_length = 0;
+	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
+
+	tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
+			  TX_DESC_DATA0_DTYPE_EXT_ |
+			  TX_DESC_DATA0_EXT_LSO_;
+
+	/* data0 will be programmed in one of other frame assembler functions */
+}
+
+static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
+					 const skb_frag_t *fragment,
+					 unsigned int frame_length)
+{
+	/* called only from within lan743x_tx_xmit_frame
+	 * assuming tx->ring_lock has already been acquired
+	 */
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct device *dev = &adapter->pdev->dev;
+	unsigned int fragment_length = 0;
+	dma_addr_t dma_ptr;
+
+	fragment_length = skb_frag_size(fragment);
+	if (!fragment_length)
+		return 0;
+
+	/* wrap up previous descriptor */
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
+
+	/* move to next descriptor */
+	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	buffer_info = &tx->buffer_info[tx->frame_tail];
+	dma_ptr = skb_frag_dma_map(dev, fragment,
+				   0, fragment_length,
+				   DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, dma_ptr)) {
+		int desc_index;
+
+		/* cleanup all previously setup descriptors */
+		desc_index = tx->frame_first;
+		while (desc_index != tx->frame_tail) {
+			lan743x_tx_release_desc(tx, desc_index, true);
+			desc_index = lan743x_tx_next_index(tx, desc_index);
+		}
+		dma_wmb();
+		tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
+		tx->frame_first = 0;
+		tx->frame_data0 = 0;
+		tx->frame_tail = 0;
+		return -ENOMEM;
+	}
+
+	tx_descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(dma_ptr));
+	tx_descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(dma_ptr));
+	tx_descriptor->data3 = cpu_to_le32((frame_length << 16) &
+			       TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_);
+
+	buffer_info->skb = NULL;
+	buffer_info->dma_ptr = dma_ptr;
+	buffer_info->buffer_length = fragment_length;
+	buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
+	buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
+
+	tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
+			  TX_DESC_DATA0_DTYPE_DATA_ |
+			  TX_DESC_DATA0_FCS_;
+
+	/* data0 will be programmed in one of other frame assembler functions */
+	return 0;
+}
+
+static void lan743x_tx_frame_end(struct lan743x_tx *tx,
+				 struct sk_buff *skb,
+				 bool time_stamp,
+				 bool ignore_sync)
+{
+	/* called only from within lan743x_tx_xmit_frame
+	 * assuming tx->ring_lock has already been acquired
+	 */
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	struct lan743x_adapter *adapter = tx->adapter;
+	u32 tx_tail_flags = 0;
+
+	/* wrap up previous descriptor */
+	if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) ==
+	    TX_DESC_DATA0_DTYPE_DATA_) {
+		tx->frame_data0 |= TX_DESC_DATA0_LS_;
+		tx->frame_data0 |= TX_DESC_DATA0_IOC_;
+	}
+
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	buffer_info = &tx->buffer_info[tx->frame_tail];
+	buffer_info->skb = skb;
+	if (time_stamp)
+		buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED;
+	if (ignore_sync)
+		buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
+
+	tx_descriptor->data0 = cpu_to_le32(tx->frame_data0);
+	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
+	tx->last_tail = tx->frame_tail;
+
+	dma_wmb();
+
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
+		tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
+		tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
+		TX_TAIL_SET_TOP_INT_EN_;
+
+	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
+			  tx_tail_flags | tx->frame_tail);
+	tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
+}
+
+static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
+					 struct sk_buff *skb)
+{
+	int required_number_of_descriptors = 0;
+	unsigned int start_frame_length = 0;
+	unsigned int frame_length = 0;
+	unsigned int head_length = 0;
+	unsigned long irq_flags = 0;
+	bool do_timestamp = false;
+	bool ignore_sync = false;
+	int nr_frags = 0;
+	bool gso = false;
+	int j;
+
+	required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
+
+	spin_lock_irqsave(&tx->ring_lock, irq_flags);
+	if (required_number_of_descriptors >
+		lan743x_tx_get_avail_desc(tx)) {
+		if (required_number_of_descriptors > (tx->ring_size - 1)) {
+			dev_kfree_skb_irq(skb);
+		} else {
+			/* save to overflow buffer */
+			tx->overflow_skb = skb;
+			netif_stop_queue(tx->adapter->netdev);
+		}
+		goto unlock;
+	}
+
+	/* space available, transmit skb  */
+	if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
+	    (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) &&
+	    (lan743x_ptp_request_tx_timestamp(tx->adapter))) {
+		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+		do_timestamp = true;
+		if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC)
+			ignore_sync = true;
+	}
+	head_length = skb_headlen(skb);
+	frame_length = skb_pagelen(skb);
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	start_frame_length = frame_length;
+	gso = skb_is_gso(skb);
+	if (gso) {
+		start_frame_length = max(skb_shinfo(skb)->gso_size,
+					 (unsigned short)8);
+	}
+
+	if (lan743x_tx_frame_start(tx,
+				   skb->data, head_length,
+				   start_frame_length,
+				   do_timestamp,
+				   skb->ip_summed == CHECKSUM_PARTIAL)) {
+		dev_kfree_skb_irq(skb);
+		goto unlock;
+	}
+
+	if (gso)
+		lan743x_tx_frame_add_lso(tx, frame_length, nr_frags);
+
+	if (nr_frags <= 0)
+		goto finish;
+
+	for (j = 0; j < nr_frags; j++) {
+		const skb_frag_t *frag = &(skb_shinfo(skb)->frags[j]);
+
+		if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
+			/* upon error no need to call
+			 *	lan743x_tx_frame_end
+			 * frame assembler clean up was performed inside
+			 *	lan743x_tx_frame_add_fragment
+			 */
+			dev_kfree_skb_irq(skb);
+			goto unlock;
+		}
+	}
+
+finish:
+	lan743x_tx_frame_end(tx, skb, do_timestamp, ignore_sync);
+
+unlock:
+	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
+	return NETDEV_TX_OK;
+}
+
+static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
+{
+	struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
+	struct lan743x_adapter *adapter = tx->adapter;
+	bool start_transmitter = false;
+	unsigned long irq_flags = 0;
+	u32 ioc_bit = 0;
+
+	ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
+	lan743x_csr_read(adapter, DMAC_INT_STS);
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
+		lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
+	spin_lock_irqsave(&tx->ring_lock, irq_flags);
+
+	/* clean up tx ring */
+	lan743x_tx_release_completed_descriptors(tx);
+	if (netif_queue_stopped(adapter->netdev)) {
+		if (tx->overflow_skb) {
+			if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
+				lan743x_tx_get_avail_desc(tx))
+				start_transmitter = true;
+		} else {
+			netif_wake_queue(adapter->netdev);
+		}
+	}
+	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
+
+	if (start_transmitter) {
+		/* space is now available, transmit overflow skb */
+		lan743x_tx_xmit_frame(tx, tx->overflow_skb);
+		tx->overflow_skb = NULL;
+		netif_wake_queue(adapter->netdev);
+	}
+
+	if (!napi_complete(napi))
+		goto done;
+
+	/* enable isr */
+	lan743x_csr_write(adapter, INT_EN_SET,
+			  INT_BIT_DMA_TX_(tx->channel_number));
+	lan743x_csr_read(adapter, INT_STS);
+
+done:
+	return 0;
+}
+
+static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
+{
+	if (tx->head_cpu_ptr) {
+		dma_free_coherent(&tx->adapter->pdev->dev,
+				  sizeof(*tx->head_cpu_ptr), tx->head_cpu_ptr,
+				  tx->head_dma_ptr);
+		tx->head_cpu_ptr = NULL;
+		tx->head_dma_ptr = 0;
+	}
+	kfree(tx->buffer_info);
+	tx->buffer_info = NULL;
+
+	if (tx->ring_cpu_ptr) {
+		dma_free_coherent(&tx->adapter->pdev->dev,
+				  tx->ring_allocation_size, tx->ring_cpu_ptr,
+				  tx->ring_dma_ptr);
+		tx->ring_allocation_size = 0;
+		tx->ring_cpu_ptr = NULL;
+		tx->ring_dma_ptr = 0;
+	}
+	tx->ring_size = 0;
+}
+
+static int lan743x_tx_ring_init(struct lan743x_tx *tx)
+{
+	size_t ring_allocation_size = 0;
+	void *cpu_ptr = NULL;
+	dma_addr_t dma_ptr;
+	int ret = -ENOMEM;
+
+	tx->ring_size = LAN743X_TX_RING_SIZE;
+	if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
+		ret = -EINVAL;
+		goto cleanup;
+	}
+	if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
+				      DMA_BIT_MASK(64))) {
+		if (dma_set_mask_and_coherent(&tx->adapter->pdev->dev,
+					      DMA_BIT_MASK(32))) {
+			dev_warn(&tx->adapter->pdev->dev,
+				 "lan743x_: No suitable DMA available\n");
+			ret = -ENOMEM;
+			goto cleanup;
+		}
+	}
+	ring_allocation_size = ALIGN(tx->ring_size *
+				     sizeof(struct lan743x_tx_descriptor),
+				     PAGE_SIZE);
+	dma_ptr = 0;
+	cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
+				     ring_allocation_size, &dma_ptr, GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	tx->ring_allocation_size = ring_allocation_size;
+	tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
+	tx->ring_dma_ptr = dma_ptr;
+
+	cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
+	dma_ptr = 0;
+	cpu_ptr = dma_alloc_coherent(&tx->adapter->pdev->dev,
+				     sizeof(*tx->head_cpu_ptr), &dma_ptr,
+				     GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	tx->head_cpu_ptr = cpu_ptr;
+	tx->head_dma_ptr = dma_ptr;
+	if (tx->head_dma_ptr & 0x3) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	return 0;
+
+cleanup:
+	lan743x_tx_ring_cleanup(tx);
+	return ret;
+}
+
+static void lan743x_tx_close(struct lan743x_tx *tx)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+
+	lan743x_csr_write(adapter,
+			  DMAC_CMD,
+			  DMAC_CMD_STOP_T_(tx->channel_number));
+	lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
+
+	lan743x_csr_write(adapter,
+			  DMAC_INT_EN_CLR,
+			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
+	lan743x_csr_write(adapter, INT_EN_CLR,
+			  INT_BIT_DMA_TX_(tx->channel_number));
+	napi_disable(&tx->napi);
+	netif_napi_del(&tx->napi);
+
+	lan743x_csr_write(adapter, FCT_TX_CTL,
+			  FCT_TX_CTL_DIS_(tx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
+				 FCT_TX_CTL_EN_(tx->channel_number),
+				 0, 1000, 20000, 100);
+
+	lan743x_tx_release_all_descriptors(tx);
+
+	if (tx->overflow_skb) {
+		dev_kfree_skb(tx->overflow_skb);
+		tx->overflow_skb = NULL;
+	}
+
+	lan743x_tx_ring_cleanup(tx);
+}
+
+static int lan743x_tx_open(struct lan743x_tx *tx)
+{
+	struct lan743x_adapter *adapter = NULL;
+	u32 data = 0;
+	int ret;
+
+	adapter = tx->adapter;
+	ret = lan743x_tx_ring_init(tx);
+	if (ret)
+		return ret;
+
+	/* initialize fifo */
+	lan743x_csr_write(adapter, FCT_TX_CTL,
+			  FCT_TX_CTL_RESET_(tx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
+				 FCT_TX_CTL_RESET_(tx->channel_number),
+				 0, 1000, 20000, 100);
+
+	/* enable fifo */
+	lan743x_csr_write(adapter, FCT_TX_CTL,
+			  FCT_TX_CTL_EN_(tx->channel_number));
+
+	/* reset tx channel */
+	lan743x_csr_write(adapter, DMAC_CMD,
+			  DMAC_CMD_TX_SWR_(tx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
+				 DMAC_CMD_TX_SWR_(tx->channel_number),
+				 0, 1000, 20000, 100);
+
+	/* Write TX_BASE_ADDR */
+	lan743x_csr_write(adapter,
+			  TX_BASE_ADDRH(tx->channel_number),
+			  DMA_ADDR_HIGH32(tx->ring_dma_ptr));
+	lan743x_csr_write(adapter,
+			  TX_BASE_ADDRL(tx->channel_number),
+			  DMA_ADDR_LOW32(tx->ring_dma_ptr));
+
+	/* Write TX_CFG_B */
+	data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
+	data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
+	data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
+		data |= TX_CFG_B_TDMABL_512_;
+	lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
+
+	/* Write TX_CFG_A */
+	data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
+		data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
+		data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
+		data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
+		data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
+	}
+	lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
+
+	/* Write TX_HEAD_WRITEBACK_ADDR */
+	lan743x_csr_write(adapter,
+			  TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
+			  DMA_ADDR_HIGH32(tx->head_dma_ptr));
+	lan743x_csr_write(adapter,
+			  TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
+			  DMA_ADDR_LOW32(tx->head_dma_ptr));
+
+	/* set last head */
+	tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
+
+	/* write TX_TAIL */
+	tx->last_tail = 0;
+	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
+			  (u32)(tx->last_tail));
+	tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
+							 INT_BIT_DMA_TX_
+							 (tx->channel_number));
+	netif_tx_napi_add(adapter->netdev,
+			  &tx->napi, lan743x_tx_napi_poll,
+			  tx->ring_size - 1);
+	napi_enable(&tx->napi);
+
+	data = 0;
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
+		data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
+		data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
+		data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
+	if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
+		data |= TX_CFG_C_TX_INT_EN_R2C_;
+	lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
+
+	if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_TX_(tx->channel_number));
+	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
+			  DMAC_INT_BIT_TX_IOC_(tx->channel_number));
+
+	/*  start dmac channel */
+	lan743x_csr_write(adapter, DMAC_CMD,
+			  DMAC_CMD_START_T_(tx->channel_number));
+	return 0;
+}
+
+static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
+{
+	return ((++index) % rx->ring_size);
+}
+
+static struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx, gfp_t gfp)
+{
+	int length = 0;
+
+	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
+	return __netdev_alloc_skb(rx->adapter->netdev,
+				  length, gfp);
+}
+
+static void lan743x_rx_update_tail(struct lan743x_rx *rx, int index)
+{
+	/* update the tail once per 8 descriptors */
+	if ((index & 7) == 7)
+		lan743x_csr_write(rx->adapter, RX_TAIL(rx->channel_number),
+				  index);
+}
+
+static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index,
+					struct sk_buff *skb)
+{
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_rx_descriptor *descriptor;
+	int length = 0;
+
+	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
+	descriptor = &rx->ring_cpu_ptr[index];
+	buffer_info = &rx->buffer_info[index];
+	buffer_info->skb = skb;
+	if (!(buffer_info->skb))
+		return -ENOMEM;
+	buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
+					      buffer_info->skb->data,
+					      length,
+					      DMA_FROM_DEVICE);
+	if (dma_mapping_error(&rx->adapter->pdev->dev,
+			      buffer_info->dma_ptr)) {
+		buffer_info->dma_ptr = 0;
+		return -ENOMEM;
+	}
+
+	buffer_info->buffer_length = length;
+	descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
+	descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
+	descriptor->data3 = 0;
+	descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
+			    (length & RX_DESC_DATA0_BUF_LENGTH_MASK_)));
+	skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
+	lan743x_rx_update_tail(rx, index);
+
+	return 0;
+}
+
+static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
+{
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_rx_descriptor *descriptor;
+
+	descriptor = &rx->ring_cpu_ptr[index];
+	buffer_info = &rx->buffer_info[index];
+
+	descriptor->data1 = cpu_to_le32(DMA_ADDR_LOW32(buffer_info->dma_ptr));
+	descriptor->data2 = cpu_to_le32(DMA_ADDR_HIGH32(buffer_info->dma_ptr));
+	descriptor->data3 = 0;
+	descriptor->data0 = cpu_to_le32((RX_DESC_DATA0_OWN_ |
+			    ((buffer_info->buffer_length) &
+			    RX_DESC_DATA0_BUF_LENGTH_MASK_)));
+	lan743x_rx_update_tail(rx, index);
+}
+
+static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
+{
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_rx_descriptor *descriptor;
+
+	descriptor = &rx->ring_cpu_ptr[index];
+	buffer_info = &rx->buffer_info[index];
+
+	memset(descriptor, 0, sizeof(*descriptor));
+
+	if (buffer_info->dma_ptr) {
+		dma_unmap_single(&rx->adapter->pdev->dev,
+				 buffer_info->dma_ptr,
+				 buffer_info->buffer_length,
+				 DMA_FROM_DEVICE);
+		buffer_info->dma_ptr = 0;
+	}
+
+	if (buffer_info->skb) {
+		dev_kfree_skb(buffer_info->skb);
+		buffer_info->skb = NULL;
+	}
+
+	memset(buffer_info, 0, sizeof(*buffer_info));
+}
+
+static int lan743x_rx_process_packet(struct lan743x_rx *rx)
+{
+	struct skb_shared_hwtstamps *hwtstamps = NULL;
+	int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
+	int current_head_index = le32_to_cpu(*rx->head_cpu_ptr);
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_rx_descriptor *descriptor;
+	int extension_index = -1;
+	int first_index = -1;
+	int last_index = -1;
+
+	if (current_head_index < 0 || current_head_index >= rx->ring_size)
+		goto done;
+
+	if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
+		goto done;
+
+	if (rx->last_head != current_head_index) {
+		descriptor = &rx->ring_cpu_ptr[rx->last_head];
+		if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
+			goto done;
+
+		if (!(le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_FS_))
+			goto done;
+
+		first_index = rx->last_head;
+		if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_) {
+			last_index = rx->last_head;
+		} else {
+			int index;
+
+			index = lan743x_rx_next_index(rx, first_index);
+			while (index != current_head_index) {
+				descriptor = &rx->ring_cpu_ptr[index];
+				if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_OWN_)
+					goto done;
+
+				if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_LS_) {
+					last_index = index;
+					break;
+				}
+				index = lan743x_rx_next_index(rx, index);
+			}
+		}
+		if (last_index >= 0) {
+			descriptor = &rx->ring_cpu_ptr[last_index];
+			if (le32_to_cpu(descriptor->data0) & RX_DESC_DATA0_EXT_) {
+				/* extension is expected to follow */
+				int index = lan743x_rx_next_index(rx,
+								  last_index);
+				if (index != current_head_index) {
+					descriptor = &rx->ring_cpu_ptr[index];
+					if (le32_to_cpu(descriptor->data0) &
+					    RX_DESC_DATA0_OWN_) {
+						goto done;
+					}
+					if (le32_to_cpu(descriptor->data0) &
+					    RX_DESC_DATA0_EXT_) {
+						extension_index = index;
+					} else {
+						goto done;
+					}
+				} else {
+					/* extension is not yet available */
+					/* prevent processing of this packet */
+					first_index = -1;
+					last_index = -1;
+				}
+			}
+		}
+	}
+	if (first_index >= 0 && last_index >= 0) {
+		int real_last_index = last_index;
+		struct sk_buff *skb = NULL;
+		u32 ts_sec = 0;
+		u32 ts_nsec = 0;
+
+		/* packet is available */
+		if (first_index == last_index) {
+			/* single buffer packet */
+			struct sk_buff *new_skb = NULL;
+			int packet_length;
+
+			new_skb = lan743x_rx_allocate_skb(rx,
+							  GFP_ATOMIC | GFP_DMA);
+			if (!new_skb) {
+				/* failed to allocate next skb.
+				 * Memory is very low.
+				 * Drop this packet and reuse buffer.
+				 */
+				lan743x_rx_reuse_ring_element(rx, first_index);
+				goto process_extension;
+			}
+
+			buffer_info = &rx->buffer_info[first_index];
+			skb = buffer_info->skb;
+			descriptor = &rx->ring_cpu_ptr[first_index];
+
+			/* unmap from dma */
+			if (buffer_info->dma_ptr) {
+				dma_unmap_single(&rx->adapter->pdev->dev,
+						 buffer_info->dma_ptr,
+						 buffer_info->buffer_length,
+						 DMA_FROM_DEVICE);
+				buffer_info->dma_ptr = 0;
+				buffer_info->buffer_length = 0;
+			}
+			buffer_info->skb = NULL;
+			packet_length =	RX_DESC_DATA0_FRAME_LENGTH_GET_
+					(le32_to_cpu(descriptor->data0));
+			skb_put(skb, packet_length - 4);
+			skb->protocol = eth_type_trans(skb,
+						       rx->adapter->netdev);
+			lan743x_rx_init_ring_element(rx, first_index, new_skb);
+		} else {
+			int index = first_index;
+
+			/* multi buffer packet not supported */
+			/* this should not happen since
+			 * buffers are allocated to be at least jumbo size
+			 */
+
+			/* clean up buffers */
+			if (first_index <= last_index) {
+				while ((index >= first_index) &&
+				       (index <= last_index)) {
+					lan743x_rx_reuse_ring_element(rx,
+								      index);
+					index = lan743x_rx_next_index(rx,
+								      index);
+				}
+			} else {
+				while ((index >= first_index) ||
+				       (index <= last_index)) {
+					lan743x_rx_reuse_ring_element(rx,
+								      index);
+					index = lan743x_rx_next_index(rx,
+								      index);
+				}
+			}
+		}
+
+process_extension:
+		if (extension_index >= 0) {
+			descriptor = &rx->ring_cpu_ptr[extension_index];
+			buffer_info = &rx->buffer_info[extension_index];
+
+			ts_sec = le32_to_cpu(descriptor->data1);
+			ts_nsec = (le32_to_cpu(descriptor->data2) &
+				  RX_DESC_DATA2_TS_NS_MASK_);
+			lan743x_rx_reuse_ring_element(rx, extension_index);
+			real_last_index = extension_index;
+		}
+
+		if (!skb) {
+			result = RX_PROCESS_RESULT_PACKET_DROPPED;
+			goto move_forward;
+		}
+
+		if (extension_index < 0)
+			goto pass_packet_to_os;
+		hwtstamps = skb_hwtstamps(skb);
+		if (hwtstamps)
+			hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
+
+pass_packet_to_os:
+		/* pass packet to OS */
+		napi_gro_receive(&rx->napi, skb);
+		result = RX_PROCESS_RESULT_PACKET_RECEIVED;
+
+move_forward:
+		/* push tail and head forward */
+		rx->last_tail = real_last_index;
+		rx->last_head = lan743x_rx_next_index(rx, real_last_index);
+	}
+done:
+	return result;
+}
+
+static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
+{
+	struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
+	struct lan743x_adapter *adapter = rx->adapter;
+	int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
+	u32 rx_tail_flags = 0;
+	int count;
+
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
+		/* clear int status bit before reading packet */
+		lan743x_csr_write(adapter, DMAC_INT_STS,
+				  DMAC_INT_BIT_RXFRM_(rx->channel_number));
+	}
+	for (count = 0; count < weight; count++) {
+		result = lan743x_rx_process_packet(rx);
+		if (result == RX_PROCESS_RESULT_NOTHING_TO_DO)
+			break;
+	}
+	rx->frame_count += count;
+	if (count == weight || result == RX_PROCESS_RESULT_PACKET_RECEIVED)
+		return weight;
+
+	if (!napi_complete_done(napi, count))
+		return count;
+
+	/* re-arm interrupts, must write to rx tail on some chip variants */
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
+		rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
+		rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
+	} else {
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_RX_(rx->channel_number));
+	}
+
+	if (rx_tail_flags)
+		lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
+				  rx_tail_flags | rx->last_tail);
+
+	return count;
+}
+
+static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
+{
+	if (rx->buffer_info && rx->ring_cpu_ptr) {
+		int index;
+
+		for (index = 0; index < rx->ring_size; index++)
+			lan743x_rx_release_ring_element(rx, index);
+	}
+
+	if (rx->head_cpu_ptr) {
+		dma_free_coherent(&rx->adapter->pdev->dev,
+				  sizeof(*rx->head_cpu_ptr), rx->head_cpu_ptr,
+				  rx->head_dma_ptr);
+		rx->head_cpu_ptr = NULL;
+		rx->head_dma_ptr = 0;
+	}
+
+	kfree(rx->buffer_info);
+	rx->buffer_info = NULL;
+
+	if (rx->ring_cpu_ptr) {
+		dma_free_coherent(&rx->adapter->pdev->dev,
+				  rx->ring_allocation_size, rx->ring_cpu_ptr,
+				  rx->ring_dma_ptr);
+		rx->ring_allocation_size = 0;
+		rx->ring_cpu_ptr = NULL;
+		rx->ring_dma_ptr = 0;
+	}
+
+	rx->ring_size = 0;
+	rx->last_head = 0;
+}
+
+static int lan743x_rx_ring_init(struct lan743x_rx *rx)
+{
+	size_t ring_allocation_size = 0;
+	dma_addr_t dma_ptr = 0;
+	void *cpu_ptr = NULL;
+	int ret = -ENOMEM;
+	int index = 0;
+
+	rx->ring_size = LAN743X_RX_RING_SIZE;
+	if (rx->ring_size <= 1) {
+		ret = -EINVAL;
+		goto cleanup;
+	}
+	if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
+		ret = -EINVAL;
+		goto cleanup;
+	}
+	if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
+				      DMA_BIT_MASK(64))) {
+		if (dma_set_mask_and_coherent(&rx->adapter->pdev->dev,
+					      DMA_BIT_MASK(32))) {
+			dev_warn(&rx->adapter->pdev->dev,
+				 "lan743x_: No suitable DMA available\n");
+			ret = -ENOMEM;
+			goto cleanup;
+		}
+	}
+	ring_allocation_size = ALIGN(rx->ring_size *
+				     sizeof(struct lan743x_rx_descriptor),
+				     PAGE_SIZE);
+	dma_ptr = 0;
+	cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
+				     ring_allocation_size, &dma_ptr, GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	rx->ring_allocation_size = ring_allocation_size;
+	rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
+	rx->ring_dma_ptr = dma_ptr;
+
+	cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
+			  GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
+	dma_ptr = 0;
+	cpu_ptr = dma_alloc_coherent(&rx->adapter->pdev->dev,
+				     sizeof(*rx->head_cpu_ptr), &dma_ptr,
+				     GFP_KERNEL);
+	if (!cpu_ptr) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	rx->head_cpu_ptr = cpu_ptr;
+	rx->head_dma_ptr = dma_ptr;
+	if (rx->head_dma_ptr & 0x3) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	rx->last_head = 0;
+	for (index = 0; index < rx->ring_size; index++) {
+		struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx,
+								   GFP_KERNEL);
+
+		ret = lan743x_rx_init_ring_element(rx, index, new_skb);
+		if (ret)
+			goto cleanup;
+	}
+	return 0;
+
+cleanup:
+	lan743x_rx_ring_cleanup(rx);
+	return ret;
+}
+
+static void lan743x_rx_close(struct lan743x_rx *rx)
+{
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	lan743x_csr_write(adapter, FCT_RX_CTL,
+			  FCT_RX_CTL_DIS_(rx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
+				 FCT_RX_CTL_EN_(rx->channel_number),
+				 0, 1000, 20000, 100);
+
+	lan743x_csr_write(adapter, DMAC_CMD,
+			  DMAC_CMD_STOP_R_(rx->channel_number));
+	lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
+
+	lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
+			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
+	lan743x_csr_write(adapter, INT_EN_CLR,
+			  INT_BIT_DMA_RX_(rx->channel_number));
+	napi_disable(&rx->napi);
+
+	netif_napi_del(&rx->napi);
+
+	lan743x_rx_ring_cleanup(rx);
+}
+
+static int lan743x_rx_open(struct lan743x_rx *rx)
+{
+	struct lan743x_adapter *adapter = rx->adapter;
+	u32 data = 0;
+	int ret;
+
+	rx->frame_count = 0;
+	ret = lan743x_rx_ring_init(rx);
+	if (ret)
+		goto return_error;
+
+	netif_napi_add(adapter->netdev,
+		       &rx->napi, lan743x_rx_napi_poll,
+		       NAPI_POLL_WEIGHT);
+
+	lan743x_csr_write(adapter, DMAC_CMD,
+			  DMAC_CMD_RX_SWR_(rx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
+				 DMAC_CMD_RX_SWR_(rx->channel_number),
+				 0, 1000, 20000, 100);
+
+	/* set ring base address */
+	lan743x_csr_write(adapter,
+			  RX_BASE_ADDRH(rx->channel_number),
+			  DMA_ADDR_HIGH32(rx->ring_dma_ptr));
+	lan743x_csr_write(adapter,
+			  RX_BASE_ADDRL(rx->channel_number),
+			  DMA_ADDR_LOW32(rx->ring_dma_ptr));
+
+	/* set rx write back address */
+	lan743x_csr_write(adapter,
+			  RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
+			  DMA_ADDR_HIGH32(rx->head_dma_ptr));
+	lan743x_csr_write(adapter,
+			  RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
+			  DMA_ADDR_LOW32(rx->head_dma_ptr));
+	data = RX_CFG_A_RX_HP_WB_EN_;
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
+		data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
+			RX_CFG_A_RX_WB_THRES_SET_(0x7) |
+			RX_CFG_A_RX_PF_THRES_SET_(16) |
+			RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
+	}
+
+	/* set RX_CFG_A */
+	lan743x_csr_write(adapter,
+			  RX_CFG_A(rx->channel_number), data);
+
+	/* set RX_CFG_B */
+	data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
+	data &= ~RX_CFG_B_RX_PAD_MASK_;
+	if (!RX_HEAD_PADDING)
+		data |= RX_CFG_B_RX_PAD_0_;
+	else
+		data |= RX_CFG_B_RX_PAD_2_;
+	data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
+	data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
+	data |= RX_CFG_B_TS_ALL_RX_;
+	if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
+		data |= RX_CFG_B_RDMABL_512_;
+
+	lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
+	rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
+							 INT_BIT_DMA_RX_
+							 (rx->channel_number));
+
+	/* set RX_CFG_C */
+	data = 0;
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
+		data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
+		data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
+		data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
+	if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
+		data |= RX_CFG_C_RX_INT_EN_R2C_;
+	lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
+
+	rx->last_tail = ((u32)(rx->ring_size - 1));
+	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
+			  rx->last_tail);
+	rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
+	if (rx->last_head) {
+		ret = -EIO;
+		goto napi_delete;
+	}
+
+	napi_enable(&rx->napi);
+
+	lan743x_csr_write(adapter, INT_EN_SET,
+			  INT_BIT_DMA_RX_(rx->channel_number));
+	lan743x_csr_write(adapter, DMAC_INT_STS,
+			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
+	lan743x_csr_write(adapter, DMAC_INT_EN_SET,
+			  DMAC_INT_BIT_RXFRM_(rx->channel_number));
+	lan743x_csr_write(adapter, DMAC_CMD,
+			  DMAC_CMD_START_R_(rx->channel_number));
+
+	/* initialize fifo */
+	lan743x_csr_write(adapter, FCT_RX_CTL,
+			  FCT_RX_CTL_RESET_(rx->channel_number));
+	lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
+				 FCT_RX_CTL_RESET_(rx->channel_number),
+				 0, 1000, 20000, 100);
+	lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
+			  FCT_FLOW_CTL_REQ_EN_ |
+			  FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
+			  FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
+
+	/* enable fifo */
+	lan743x_csr_write(adapter, FCT_RX_CTL,
+			  FCT_RX_CTL_EN_(rx->channel_number));
+	return 0;
+
+napi_delete:
+	netif_napi_del(&rx->napi);
+	lan743x_rx_ring_cleanup(rx);
+
+return_error:
+	return ret;
+}
+
+static int lan743x_netdev_close(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int index;
+
+	lan743x_tx_close(&adapter->tx[0]);
+
+	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
+		lan743x_rx_close(&adapter->rx[index]);
+
+	lan743x_ptp_close(adapter);
+
+	lan743x_phy_close(adapter);
+
+	lan743x_mac_close(adapter);
+
+	lan743x_intr_close(adapter);
+
+	return 0;
+}
+
+static int lan743x_netdev_open(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int index;
+	int ret;
+
+	ret = lan743x_intr_open(adapter);
+	if (ret)
+		goto return_error;
+
+	ret = lan743x_mac_open(adapter);
+	if (ret)
+		goto close_intr;
+
+	ret = lan743x_phy_open(adapter);
+	if (ret)
+		goto close_mac;
+
+	ret = lan743x_ptp_open(adapter);
+	if (ret)
+		goto close_phy;
+
+	lan743x_rfe_open(adapter);
+
+	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
+		ret = lan743x_rx_open(&adapter->rx[index]);
+		if (ret)
+			goto close_rx;
+	}
+
+	ret = lan743x_tx_open(&adapter->tx[0]);
+	if (ret)
+		goto close_rx;
+
+	return 0;
+
+close_rx:
+	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
+		if (adapter->rx[index].ring_cpu_ptr)
+			lan743x_rx_close(&adapter->rx[index]);
+	}
+	lan743x_ptp_close(adapter);
+
+close_phy:
+	lan743x_phy_close(adapter);
+
+close_mac:
+	lan743x_mac_close(adapter);
+
+close_intr:
+	lan743x_intr_close(adapter);
+
+return_error:
+	netif_warn(adapter, ifup, adapter->netdev,
+		   "Error opening LAN743x\n");
+	return ret;
+}
+
+static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
+					     struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
+}
+
+static int lan743x_netdev_ioctl(struct net_device *netdev,
+				struct ifreq *ifr, int cmd)
+{
+	if (!netif_running(netdev))
+		return -EINVAL;
+	if (cmd == SIOCSHWTSTAMP)
+		return lan743x_ptp_ioctl(netdev, ifr, cmd);
+	return phy_mii_ioctl(netdev->phydev, ifr, cmd);
+}
+
+static void lan743x_netdev_set_multicast(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	lan743x_rfe_set_multicast(adapter);
+}
+
+static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int ret = 0;
+
+	ret = lan743x_mac_set_mtu(adapter, new_mtu);
+	if (!ret)
+		netdev->mtu = new_mtu;
+	return ret;
+}
+
+static void lan743x_netdev_get_stats64(struct net_device *netdev,
+				       struct rtnl_link_stats64 *stats)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
+	stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
+	stats->rx_bytes = lan743x_csr_read(adapter,
+					   STAT_RX_UNICAST_BYTE_COUNT) +
+			  lan743x_csr_read(adapter,
+					   STAT_RX_BROADCAST_BYTE_COUNT) +
+			  lan743x_csr_read(adapter,
+					   STAT_RX_MULTICAST_BYTE_COUNT);
+	stats->tx_bytes = lan743x_csr_read(adapter,
+					   STAT_TX_UNICAST_BYTE_COUNT) +
+			  lan743x_csr_read(adapter,
+					   STAT_TX_BROADCAST_BYTE_COUNT) +
+			  lan743x_csr_read(adapter,
+					   STAT_TX_MULTICAST_BYTE_COUNT);
+	stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
+			   lan743x_csr_read(adapter,
+					    STAT_RX_ALIGNMENT_ERRORS) +
+			   lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
+			   lan743x_csr_read(adapter,
+					    STAT_RX_UNDERSIZE_FRAME_ERRORS) +
+			   lan743x_csr_read(adapter,
+					    STAT_RX_OVERSIZE_FRAME_ERRORS);
+	stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
+			   lan743x_csr_read(adapter,
+					    STAT_TX_EXCESS_DEFERRAL_ERRORS) +
+			   lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
+	stats->rx_dropped = lan743x_csr_read(adapter,
+					     STAT_RX_DROPPED_FRAMES);
+	stats->tx_dropped = lan743x_csr_read(adapter,
+					     STAT_TX_EXCESSIVE_COLLISION);
+	stats->multicast = lan743x_csr_read(adapter,
+					    STAT_RX_MULTICAST_FRAMES) +
+			   lan743x_csr_read(adapter,
+					    STAT_TX_MULTICAST_FRAMES);
+	stats->collisions = lan743x_csr_read(adapter,
+					     STAT_TX_SINGLE_COLLISIONS) +
+			    lan743x_csr_read(adapter,
+					     STAT_TX_MULTIPLE_COLLISIONS) +
+			    lan743x_csr_read(adapter,
+					     STAT_TX_LATE_COLLISIONS);
+}
+
+static int lan743x_netdev_set_mac_address(struct net_device *netdev,
+					  void *addr)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct sockaddr *sock_addr = addr;
+	int ret;
+
+	ret = eth_prepare_mac_addr_change(netdev, sock_addr);
+	if (ret)
+		return ret;
+	ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
+	lan743x_mac_set_address(adapter, sock_addr->sa_data);
+	lan743x_rfe_update_mac_address(adapter);
+	return 0;
+}
+
+static const struct net_device_ops lan743x_netdev_ops = {
+	.ndo_open		= lan743x_netdev_open,
+	.ndo_stop		= lan743x_netdev_close,
+	.ndo_start_xmit		= lan743x_netdev_xmit_frame,
+	.ndo_do_ioctl		= lan743x_netdev_ioctl,
+	.ndo_set_rx_mode	= lan743x_netdev_set_multicast,
+	.ndo_change_mtu		= lan743x_netdev_change_mtu,
+	.ndo_get_stats64	= lan743x_netdev_get_stats64,
+	.ndo_set_mac_address	= lan743x_netdev_set_mac_address,
+};
+
+static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
+}
+
+static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
+{
+	mdiobus_unregister(adapter->mdiobus);
+}
+
+static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
+{
+	unregister_netdev(adapter->netdev);
+
+	lan743x_mdiobus_cleanup(adapter);
+	lan743x_hardware_cleanup(adapter);
+	lan743x_pci_cleanup(adapter);
+}
+
+static int lan743x_hardware_init(struct lan743x_adapter *adapter,
+				 struct pci_dev *pdev)
+{
+	struct lan743x_tx *tx;
+	int index;
+	int ret;
+
+	adapter->intr.irq = adapter->pdev->irq;
+	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
+
+	ret = lan743x_gpio_init(adapter);
+	if (ret)
+		return ret;
+
+	ret = lan743x_mac_init(adapter);
+	if (ret)
+		return ret;
+
+	ret = lan743x_phy_init(adapter);
+	if (ret)
+		return ret;
+
+	ret = lan743x_ptp_init(adapter);
+	if (ret)
+		return ret;
+
+	lan743x_rfe_update_mac_address(adapter);
+
+	ret = lan743x_dmac_init(adapter);
+	if (ret)
+		return ret;
+
+	for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
+		adapter->rx[index].adapter = adapter;
+		adapter->rx[index].channel_number = index;
+	}
+
+	tx = &adapter->tx[0];
+	tx->adapter = adapter;
+	tx->channel_number = 0;
+	spin_lock_init(&tx->ring_lock);
+	return 0;
+}
+
+static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
+{
+	int ret;
+
+	adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
+	if (!(adapter->mdiobus)) {
+		ret = -ENOMEM;
+		goto return_error;
+	}
+
+	adapter->mdiobus->priv = (void *)adapter;
+	adapter->mdiobus->read = lan743x_mdiobus_read;
+	adapter->mdiobus->write = lan743x_mdiobus_write;
+	adapter->mdiobus->name = "lan743x-mdiobus";
+	snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
+		 "pci-%s", pci_name(adapter->pdev));
+
+	if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_)
+		/* LAN7430 uses internal phy at address 1 */
+		adapter->mdiobus->phy_mask = ~(u32)BIT(1);
+
+	/* register mdiobus */
+	ret = mdiobus_register(adapter->mdiobus);
+	if (ret < 0)
+		goto return_error;
+	return 0;
+
+return_error:
+	return ret;
+}
+
+/* lan743x_pcidev_probe - Device Initialization Routine
+ * @pdev: PCI device information struct
+ * @id: entry in lan743x_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ *
+ * initializes an adapter identified by a pci_dev structure.
+ * The OS initialization, configuring of the adapter private structure,
+ * and a hardware reset occur.
+ **/
+static int lan743x_pcidev_probe(struct pci_dev *pdev,
+				const struct pci_device_id *id)
+{
+	struct lan743x_adapter *adapter = NULL;
+	struct net_device *netdev = NULL;
+	const void *mac_addr;
+	int ret = -ENODEV;
+
+	netdev = devm_alloc_etherdev(&pdev->dev,
+				     sizeof(struct lan743x_adapter));
+	if (!netdev)
+		goto return_error;
+
+	SET_NETDEV_DEV(netdev, &pdev->dev);
+	pci_set_drvdata(pdev, netdev);
+	adapter = netdev_priv(netdev);
+	adapter->netdev = netdev;
+	adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
+			      NETIF_MSG_LINK | NETIF_MSG_IFUP |
+			      NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
+	netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
+
+	mac_addr = of_get_mac_address(pdev->dev.of_node);
+	if (!IS_ERR(mac_addr))
+		ether_addr_copy(adapter->mac_address, mac_addr);
+
+	ret = lan743x_pci_init(adapter, pdev);
+	if (ret)
+		goto return_error;
+
+	ret = lan743x_csr_init(adapter);
+	if (ret)
+		goto cleanup_pci;
+
+	ret = lan743x_hardware_init(adapter, pdev);
+	if (ret)
+		goto cleanup_pci;
+
+	ret = lan743x_mdiobus_init(adapter);
+	if (ret)
+		goto cleanup_hardware;
+
+	adapter->netdev->netdev_ops = &lan743x_netdev_ops;
+	adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
+	adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
+	adapter->netdev->hw_features = adapter->netdev->features;
+
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
+	ret = register_netdev(adapter->netdev);
+	if (ret < 0)
+		goto cleanup_mdiobus;
+	return 0;
+
+cleanup_mdiobus:
+	lan743x_mdiobus_cleanup(adapter);
+
+cleanup_hardware:
+	lan743x_hardware_cleanup(adapter);
+
+cleanup_pci:
+	lan743x_pci_cleanup(adapter);
+
+return_error:
+	pr_warn("Initialization failed\n");
+	return ret;
+}
+
+/**
+ * lan743x_pcidev_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * this is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.  This could be caused by a
+ * Hot-Plug event, or because the driver is going to be removed from
+ * memory.
+ **/
+static void lan743x_pcidev_remove(struct pci_dev *pdev)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	lan743x_full_cleanup(adapter);
+}
+
+static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	rtnl_lock();
+	netif_device_detach(netdev);
+
+	/* close netdev when netdev is at running state.
+	 * For instance, it is true when system goes to sleep by pm-suspend
+	 * However, it is false when system goes to sleep by suspend GUI menu
+	 */
+	if (netif_running(netdev))
+		lan743x_netdev_close(netdev);
+	rtnl_unlock();
+
+#ifdef CONFIG_PM
+	pci_save_state(pdev);
+#endif
+
+	/* clean up lan743x portion */
+	lan743x_hardware_cleanup(adapter);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
+{
+	return bitrev16(crc16(0xFFFF, buf, len));
+}
+
+static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
+{
+	const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
+	const u8 ipv6_multicast[3] = { 0x33, 0x33 };
+	const u8 arp_type[2] = { 0x08, 0x06 };
+	int mask_index;
+	u32 pmtctl;
+	u32 wucsr;
+	u32 macrx;
+	u16 crc;
+
+	for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
+		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
+
+	/* clear wake settings */
+	pmtctl = lan743x_csr_read(adapter, PMT_CTL);
+	pmtctl |= PMT_CTL_WUPS_MASK_;
+	pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
+		PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
+		PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
+
+	macrx = lan743x_csr_read(adapter, MAC_RX);
+
+	wucsr = 0;
+	mask_index = 0;
+
+	pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
+
+	if (adapter->wolopts & WAKE_PHY) {
+		pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
+		pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
+	}
+	if (adapter->wolopts & WAKE_MAGIC) {
+		wucsr |= MAC_WUCSR_MPEN_;
+		macrx |= MAC_RX_RXEN_;
+		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
+	}
+	if (adapter->wolopts & WAKE_UCAST) {
+		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
+		macrx |= MAC_RX_RXEN_;
+		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
+		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
+	}
+	if (adapter->wolopts & WAKE_BCAST) {
+		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
+		macrx |= MAC_RX_RXEN_;
+		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
+		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
+	}
+	if (adapter->wolopts & WAKE_MCAST) {
+		/* IPv4 multicast */
+		crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
+		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
+				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
+				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
+				  (crc & MAC_WUF_CFG_CRC16_MASK_));
+		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
+		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
+		mask_index++;
+
+		/* IPv6 multicast */
+		crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
+		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
+				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
+				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
+				  (crc & MAC_WUF_CFG_CRC16_MASK_));
+		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
+		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
+		mask_index++;
+
+		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
+		macrx |= MAC_RX_RXEN_;
+		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
+		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
+	}
+	if (adapter->wolopts & WAKE_ARP) {
+		/* set MAC_WUF_CFG & WUF_MASK
+		 * for packettype (offset 12,13) = ARP (0x0806)
+		 */
+		crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
+		lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
+				  MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
+				  (0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
+				  (crc & MAC_WUF_CFG_CRC16_MASK_));
+		lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
+		lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
+		lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
+		mask_index++;
+
+		wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
+		macrx |= MAC_RX_RXEN_;
+		pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
+		pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
+	}
+
+	lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
+	lan743x_csr_write(adapter, PMT_CTL, pmtctl);
+	lan743x_csr_write(adapter, MAC_RX, macrx);
+}
+
+static int lan743x_pm_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	lan743x_pcidev_shutdown(pdev);
+
+	/* clear all wakes */
+	lan743x_csr_write(adapter, MAC_WUCSR, 0);
+	lan743x_csr_write(adapter, MAC_WUCSR2, 0);
+	lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
+
+	if (adapter->wolopts)
+		lan743x_pm_set_wol(adapter);
+
+	/* Host sets PME_En, put D3hot */
+	return pci_prepare_to_sleep(pdev);;
+}
+
+static int lan743x_pm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int ret;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+	pci_save_state(pdev);
+
+	ret = lan743x_hardware_init(adapter, pdev);
+	if (ret) {
+		netif_err(adapter, probe, adapter->netdev,
+			  "lan743x_hardware_init returned %d\n", ret);
+		lan743x_pci_cleanup(adapter);
+		return ret;
+	}
+
+	/* open netdev when netdev is at running state while resume.
+	 * For instance, it is true when system wakesup after pm-suspend
+	 * However, it is false when system wakes up after suspend GUI menu
+	 */
+	if (netif_running(netdev))
+		lan743x_netdev_open(netdev);
+
+	netif_device_attach(netdev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops lan743x_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
+};
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct pci_device_id lan743x_pcidev_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl);
+
+static struct pci_driver lan743x_pcidev_driver = {
+	.name     = DRIVER_NAME,
+	.id_table = lan743x_pcidev_tbl,
+	.probe    = lan743x_pcidev_probe,
+	.remove   = lan743x_pcidev_remove,
+#ifdef CONFIG_PM_SLEEP
+	.driver.pm = &lan743x_pm_ops,
+#endif
+	.shutdown = lan743x_pcidev_shutdown,
+};
+
+module_pci_driver(lan743x_pcidev_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");